1 //===-- ARMISelLowering.cpp - ARM DAG Lowering Implementation -------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the interfaces that ARM uses to lower LLVM code into a
13 //===----------------------------------------------------------------------===//
15 #include "ARMISelLowering.h"
16 #include "ARMCallingConv.h"
17 #include "ARMConstantPoolValue.h"
18 #include "ARMMachineFunctionInfo.h"
19 #include "ARMPerfectShuffle.h"
20 #include "ARMSubtarget.h"
21 #include "ARMTargetMachine.h"
22 #include "ARMTargetObjectFile.h"
23 #include "MCTargetDesc/ARMAddressingModes.h"
24 #include "llvm/ADT/Statistic.h"
25 #include "llvm/ADT/StringExtras.h"
26 #include "llvm/ADT/StringSwitch.h"
27 #include "llvm/CodeGen/CallingConvLower.h"
28 #include "llvm/CodeGen/IntrinsicLowering.h"
29 #include "llvm/CodeGen/MachineBasicBlock.h"
30 #include "llvm/CodeGen/MachineFrameInfo.h"
31 #include "llvm/CodeGen/MachineFunction.h"
32 #include "llvm/CodeGen/MachineInstrBuilder.h"
33 #include "llvm/CodeGen/MachineJumpTableInfo.h"
34 #include "llvm/CodeGen/MachineModuleInfo.h"
35 #include "llvm/CodeGen/MachineRegisterInfo.h"
36 #include "llvm/CodeGen/SelectionDAG.h"
37 #include "llvm/IR/CallingConv.h"
38 #include "llvm/IR/Constants.h"
39 #include "llvm/IR/Function.h"
40 #include "llvm/IR/GlobalValue.h"
41 #include "llvm/IR/IRBuilder.h"
42 #include "llvm/IR/Instruction.h"
43 #include "llvm/IR/Instructions.h"
44 #include "llvm/IR/IntrinsicInst.h"
45 #include "llvm/IR/Intrinsics.h"
46 #include "llvm/IR/Type.h"
47 #include "llvm/MC/MCSectionMachO.h"
48 #include "llvm/Support/CommandLine.h"
49 #include "llvm/Support/Debug.h"
50 #include "llvm/Support/ErrorHandling.h"
51 #include "llvm/Support/MathExtras.h"
52 #include "llvm/Support/raw_ostream.h"
53 #include "llvm/Target/TargetOptions.h"
57 #define DEBUG_TYPE "arm-isel"
59 STATISTIC(NumTailCalls, "Number of tail calls");
60 STATISTIC(NumMovwMovt, "Number of GAs materialized with movw + movt");
61 STATISTIC(NumLoopByVals, "Number of loops generated for byval arguments");
64 ARMInterworking("arm-interworking", cl::Hidden,
65 cl::desc("Enable / disable ARM interworking (for debugging only)"),
69 class ARMCCState : public CCState {
71 ARMCCState(CallingConv::ID CC, bool isVarArg, MachineFunction &MF,
72 SmallVectorImpl<CCValAssign> &locs, LLVMContext &C,
74 : CCState(CC, isVarArg, MF, locs, C) {
75 assert(((PC == Call) || (PC == Prologue)) &&
76 "ARMCCState users must specify whether their context is call"
77 "or prologue generation.");
83 // The APCS parameter registers.
84 static const MCPhysReg GPRArgRegs[] = {
85 ARM::R0, ARM::R1, ARM::R2, ARM::R3
88 void ARMTargetLowering::addTypeForNEON(MVT VT, MVT PromotedLdStVT,
89 MVT PromotedBitwiseVT) {
90 if (VT != PromotedLdStVT) {
91 setOperationAction(ISD::LOAD, VT, Promote);
92 AddPromotedToType (ISD::LOAD, VT, PromotedLdStVT);
94 setOperationAction(ISD::STORE, VT, Promote);
95 AddPromotedToType (ISD::STORE, VT, PromotedLdStVT);
98 MVT ElemTy = VT.getVectorElementType();
99 if (ElemTy != MVT::i64 && ElemTy != MVT::f64)
100 setOperationAction(ISD::SETCC, VT, Custom);
101 setOperationAction(ISD::INSERT_VECTOR_ELT, VT, Custom);
102 setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Custom);
103 if (ElemTy == MVT::i32) {
104 setOperationAction(ISD::SINT_TO_FP, VT, Custom);
105 setOperationAction(ISD::UINT_TO_FP, VT, Custom);
106 setOperationAction(ISD::FP_TO_SINT, VT, Custom);
107 setOperationAction(ISD::FP_TO_UINT, VT, Custom);
109 setOperationAction(ISD::SINT_TO_FP, VT, Expand);
110 setOperationAction(ISD::UINT_TO_FP, VT, Expand);
111 setOperationAction(ISD::FP_TO_SINT, VT, Expand);
112 setOperationAction(ISD::FP_TO_UINT, VT, Expand);
114 setOperationAction(ISD::BUILD_VECTOR, VT, Custom);
115 setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom);
116 setOperationAction(ISD::CONCAT_VECTORS, VT, Legal);
117 setOperationAction(ISD::EXTRACT_SUBVECTOR, VT, Legal);
118 setOperationAction(ISD::SELECT, VT, Expand);
119 setOperationAction(ISD::SELECT_CC, VT, Expand);
120 setOperationAction(ISD::VSELECT, VT, Expand);
121 setOperationAction(ISD::SIGN_EXTEND_INREG, VT, Expand);
122 if (VT.isInteger()) {
123 setOperationAction(ISD::SHL, VT, Custom);
124 setOperationAction(ISD::SRA, VT, Custom);
125 setOperationAction(ISD::SRL, VT, Custom);
128 // Promote all bit-wise operations.
129 if (VT.isInteger() && VT != PromotedBitwiseVT) {
130 setOperationAction(ISD::AND, VT, Promote);
131 AddPromotedToType (ISD::AND, VT, PromotedBitwiseVT);
132 setOperationAction(ISD::OR, VT, Promote);
133 AddPromotedToType (ISD::OR, VT, PromotedBitwiseVT);
134 setOperationAction(ISD::XOR, VT, Promote);
135 AddPromotedToType (ISD::XOR, VT, PromotedBitwiseVT);
138 // Neon does not support vector divide/remainder operations.
139 setOperationAction(ISD::SDIV, VT, Expand);
140 setOperationAction(ISD::UDIV, VT, Expand);
141 setOperationAction(ISD::FDIV, VT, Expand);
142 setOperationAction(ISD::SREM, VT, Expand);
143 setOperationAction(ISD::UREM, VT, Expand);
144 setOperationAction(ISD::FREM, VT, Expand);
147 void ARMTargetLowering::addDRTypeForNEON(MVT VT) {
148 addRegisterClass(VT, &ARM::DPRRegClass);
149 addTypeForNEON(VT, MVT::f64, MVT::v2i32);
152 void ARMTargetLowering::addQRTypeForNEON(MVT VT) {
153 addRegisterClass(VT, &ARM::DPairRegClass);
154 addTypeForNEON(VT, MVT::v2f64, MVT::v4i32);
157 ARMTargetLowering::ARMTargetLowering(const TargetMachine &TM,
158 const ARMSubtarget &STI)
159 : TargetLowering(TM), Subtarget(&STI) {
160 RegInfo = Subtarget->getRegisterInfo();
161 Itins = Subtarget->getInstrItineraryData();
163 setBooleanVectorContents(ZeroOrNegativeOneBooleanContent);
165 if (Subtarget->isTargetMachO()) {
166 // Uses VFP for Thumb libfuncs if available.
167 if (Subtarget->isThumb() && Subtarget->hasVFP2() &&
168 Subtarget->hasARMOps() && !Subtarget->useSoftFloat()) {
169 // Single-precision floating-point arithmetic.
170 setLibcallName(RTLIB::ADD_F32, "__addsf3vfp");
171 setLibcallName(RTLIB::SUB_F32, "__subsf3vfp");
172 setLibcallName(RTLIB::MUL_F32, "__mulsf3vfp");
173 setLibcallName(RTLIB::DIV_F32, "__divsf3vfp");
175 // Double-precision floating-point arithmetic.
176 setLibcallName(RTLIB::ADD_F64, "__adddf3vfp");
177 setLibcallName(RTLIB::SUB_F64, "__subdf3vfp");
178 setLibcallName(RTLIB::MUL_F64, "__muldf3vfp");
179 setLibcallName(RTLIB::DIV_F64, "__divdf3vfp");
181 // Single-precision comparisons.
182 setLibcallName(RTLIB::OEQ_F32, "__eqsf2vfp");
183 setLibcallName(RTLIB::UNE_F32, "__nesf2vfp");
184 setLibcallName(RTLIB::OLT_F32, "__ltsf2vfp");
185 setLibcallName(RTLIB::OLE_F32, "__lesf2vfp");
186 setLibcallName(RTLIB::OGE_F32, "__gesf2vfp");
187 setLibcallName(RTLIB::OGT_F32, "__gtsf2vfp");
188 setLibcallName(RTLIB::UO_F32, "__unordsf2vfp");
189 setLibcallName(RTLIB::O_F32, "__unordsf2vfp");
191 setCmpLibcallCC(RTLIB::OEQ_F32, ISD::SETNE);
192 setCmpLibcallCC(RTLIB::UNE_F32, ISD::SETNE);
193 setCmpLibcallCC(RTLIB::OLT_F32, ISD::SETNE);
194 setCmpLibcallCC(RTLIB::OLE_F32, ISD::SETNE);
195 setCmpLibcallCC(RTLIB::OGE_F32, ISD::SETNE);
196 setCmpLibcallCC(RTLIB::OGT_F32, ISD::SETNE);
197 setCmpLibcallCC(RTLIB::UO_F32, ISD::SETNE);
198 setCmpLibcallCC(RTLIB::O_F32, ISD::SETEQ);
200 // Double-precision comparisons.
201 setLibcallName(RTLIB::OEQ_F64, "__eqdf2vfp");
202 setLibcallName(RTLIB::UNE_F64, "__nedf2vfp");
203 setLibcallName(RTLIB::OLT_F64, "__ltdf2vfp");
204 setLibcallName(RTLIB::OLE_F64, "__ledf2vfp");
205 setLibcallName(RTLIB::OGE_F64, "__gedf2vfp");
206 setLibcallName(RTLIB::OGT_F64, "__gtdf2vfp");
207 setLibcallName(RTLIB::UO_F64, "__unorddf2vfp");
208 setLibcallName(RTLIB::O_F64, "__unorddf2vfp");
210 setCmpLibcallCC(RTLIB::OEQ_F64, ISD::SETNE);
211 setCmpLibcallCC(RTLIB::UNE_F64, ISD::SETNE);
212 setCmpLibcallCC(RTLIB::OLT_F64, ISD::SETNE);
213 setCmpLibcallCC(RTLIB::OLE_F64, ISD::SETNE);
214 setCmpLibcallCC(RTLIB::OGE_F64, ISD::SETNE);
215 setCmpLibcallCC(RTLIB::OGT_F64, ISD::SETNE);
216 setCmpLibcallCC(RTLIB::UO_F64, ISD::SETNE);
217 setCmpLibcallCC(RTLIB::O_F64, ISD::SETEQ);
219 // Floating-point to integer conversions.
220 // i64 conversions are done via library routines even when generating VFP
221 // instructions, so use the same ones.
222 setLibcallName(RTLIB::FPTOSINT_F64_I32, "__fixdfsivfp");
223 setLibcallName(RTLIB::FPTOUINT_F64_I32, "__fixunsdfsivfp");
224 setLibcallName(RTLIB::FPTOSINT_F32_I32, "__fixsfsivfp");
225 setLibcallName(RTLIB::FPTOUINT_F32_I32, "__fixunssfsivfp");
227 // Conversions between floating types.
228 setLibcallName(RTLIB::FPROUND_F64_F32, "__truncdfsf2vfp");
229 setLibcallName(RTLIB::FPEXT_F32_F64, "__extendsfdf2vfp");
231 // Integer to floating-point conversions.
232 // i64 conversions are done via library routines even when generating VFP
233 // instructions, so use the same ones.
234 // FIXME: There appears to be some naming inconsistency in ARM libgcc:
235 // e.g., __floatunsidf vs. __floatunssidfvfp.
236 setLibcallName(RTLIB::SINTTOFP_I32_F64, "__floatsidfvfp");
237 setLibcallName(RTLIB::UINTTOFP_I32_F64, "__floatunssidfvfp");
238 setLibcallName(RTLIB::SINTTOFP_I32_F32, "__floatsisfvfp");
239 setLibcallName(RTLIB::UINTTOFP_I32_F32, "__floatunssisfvfp");
243 // These libcalls are not available in 32-bit.
244 setLibcallName(RTLIB::SHL_I128, nullptr);
245 setLibcallName(RTLIB::SRL_I128, nullptr);
246 setLibcallName(RTLIB::SRA_I128, nullptr);
248 if (Subtarget->isAAPCS_ABI() && !Subtarget->isTargetMachO() &&
249 !Subtarget->isTargetWindows()) {
250 static const struct {
251 const RTLIB::Libcall Op;
252 const char * const Name;
253 const CallingConv::ID CC;
254 const ISD::CondCode Cond;
256 // Double-precision floating-point arithmetic helper functions
257 // RTABI chapter 4.1.2, Table 2
258 { RTLIB::ADD_F64, "__aeabi_dadd", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
259 { RTLIB::DIV_F64, "__aeabi_ddiv", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
260 { RTLIB::MUL_F64, "__aeabi_dmul", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
261 { RTLIB::SUB_F64, "__aeabi_dsub", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
263 // Double-precision floating-point comparison helper functions
264 // RTABI chapter 4.1.2, Table 3
265 { RTLIB::OEQ_F64, "__aeabi_dcmpeq", CallingConv::ARM_AAPCS, ISD::SETNE },
266 { RTLIB::UNE_F64, "__aeabi_dcmpeq", CallingConv::ARM_AAPCS, ISD::SETEQ },
267 { RTLIB::OLT_F64, "__aeabi_dcmplt", CallingConv::ARM_AAPCS, ISD::SETNE },
268 { RTLIB::OLE_F64, "__aeabi_dcmple", CallingConv::ARM_AAPCS, ISD::SETNE },
269 { RTLIB::OGE_F64, "__aeabi_dcmpge", CallingConv::ARM_AAPCS, ISD::SETNE },
270 { RTLIB::OGT_F64, "__aeabi_dcmpgt", CallingConv::ARM_AAPCS, ISD::SETNE },
271 { RTLIB::UO_F64, "__aeabi_dcmpun", CallingConv::ARM_AAPCS, ISD::SETNE },
272 { RTLIB::O_F64, "__aeabi_dcmpun", CallingConv::ARM_AAPCS, ISD::SETEQ },
274 // Single-precision floating-point arithmetic helper functions
275 // RTABI chapter 4.1.2, Table 4
276 { RTLIB::ADD_F32, "__aeabi_fadd", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
277 { RTLIB::DIV_F32, "__aeabi_fdiv", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
278 { RTLIB::MUL_F32, "__aeabi_fmul", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
279 { RTLIB::SUB_F32, "__aeabi_fsub", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
281 // Single-precision floating-point comparison helper functions
282 // RTABI chapter 4.1.2, Table 5
283 { RTLIB::OEQ_F32, "__aeabi_fcmpeq", CallingConv::ARM_AAPCS, ISD::SETNE },
284 { RTLIB::UNE_F32, "__aeabi_fcmpeq", CallingConv::ARM_AAPCS, ISD::SETEQ },
285 { RTLIB::OLT_F32, "__aeabi_fcmplt", CallingConv::ARM_AAPCS, ISD::SETNE },
286 { RTLIB::OLE_F32, "__aeabi_fcmple", CallingConv::ARM_AAPCS, ISD::SETNE },
287 { RTLIB::OGE_F32, "__aeabi_fcmpge", CallingConv::ARM_AAPCS, ISD::SETNE },
288 { RTLIB::OGT_F32, "__aeabi_fcmpgt", CallingConv::ARM_AAPCS, ISD::SETNE },
289 { RTLIB::UO_F32, "__aeabi_fcmpun", CallingConv::ARM_AAPCS, ISD::SETNE },
290 { RTLIB::O_F32, "__aeabi_fcmpun", CallingConv::ARM_AAPCS, ISD::SETEQ },
292 // Floating-point to integer conversions.
293 // RTABI chapter 4.1.2, Table 6
294 { RTLIB::FPTOSINT_F64_I32, "__aeabi_d2iz", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
295 { RTLIB::FPTOUINT_F64_I32, "__aeabi_d2uiz", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
296 { RTLIB::FPTOSINT_F64_I64, "__aeabi_d2lz", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
297 { RTLIB::FPTOUINT_F64_I64, "__aeabi_d2ulz", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
298 { RTLIB::FPTOSINT_F32_I32, "__aeabi_f2iz", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
299 { RTLIB::FPTOUINT_F32_I32, "__aeabi_f2uiz", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
300 { RTLIB::FPTOSINT_F32_I64, "__aeabi_f2lz", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
301 { RTLIB::FPTOUINT_F32_I64, "__aeabi_f2ulz", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
303 // Conversions between floating types.
304 // RTABI chapter 4.1.2, Table 7
305 { RTLIB::FPROUND_F64_F32, "__aeabi_d2f", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
306 { RTLIB::FPROUND_F64_F16, "__aeabi_d2h", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
307 { RTLIB::FPEXT_F32_F64, "__aeabi_f2d", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
309 // Integer to floating-point conversions.
310 // RTABI chapter 4.1.2, Table 8
311 { RTLIB::SINTTOFP_I32_F64, "__aeabi_i2d", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
312 { RTLIB::UINTTOFP_I32_F64, "__aeabi_ui2d", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
313 { RTLIB::SINTTOFP_I64_F64, "__aeabi_l2d", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
314 { RTLIB::UINTTOFP_I64_F64, "__aeabi_ul2d", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
315 { RTLIB::SINTTOFP_I32_F32, "__aeabi_i2f", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
316 { RTLIB::UINTTOFP_I32_F32, "__aeabi_ui2f", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
317 { RTLIB::SINTTOFP_I64_F32, "__aeabi_l2f", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
318 { RTLIB::UINTTOFP_I64_F32, "__aeabi_ul2f", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
320 // Long long helper functions
321 // RTABI chapter 4.2, Table 9
322 { RTLIB::MUL_I64, "__aeabi_lmul", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
323 { RTLIB::SHL_I64, "__aeabi_llsl", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
324 { RTLIB::SRL_I64, "__aeabi_llsr", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
325 { RTLIB::SRA_I64, "__aeabi_lasr", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
327 // Integer division functions
328 // RTABI chapter 4.3.1
329 { RTLIB::SDIV_I8, "__aeabi_idiv", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
330 { RTLIB::SDIV_I16, "__aeabi_idiv", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
331 { RTLIB::SDIV_I32, "__aeabi_idiv", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
332 { RTLIB::SDIV_I64, "__aeabi_ldivmod", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
333 { RTLIB::UDIV_I8, "__aeabi_uidiv", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
334 { RTLIB::UDIV_I16, "__aeabi_uidiv", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
335 { RTLIB::UDIV_I32, "__aeabi_uidiv", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
336 { RTLIB::UDIV_I64, "__aeabi_uldivmod", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
339 // RTABI chapter 4.3.4
340 { RTLIB::MEMCPY, "__aeabi_memcpy", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
341 { RTLIB::MEMMOVE, "__aeabi_memmove", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
342 { RTLIB::MEMSET, "__aeabi_memset", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },
345 for (const auto &LC : LibraryCalls) {
346 setLibcallName(LC.Op, LC.Name);
347 setLibcallCallingConv(LC.Op, LC.CC);
348 if (LC.Cond != ISD::SETCC_INVALID)
349 setCmpLibcallCC(LC.Op, LC.Cond);
353 if (Subtarget->isTargetWindows()) {
354 static const struct {
355 const RTLIB::Libcall Op;
356 const char * const Name;
357 const CallingConv::ID CC;
359 { RTLIB::FPTOSINT_F32_I64, "__stoi64", CallingConv::ARM_AAPCS_VFP },
360 { RTLIB::FPTOSINT_F64_I64, "__dtoi64", CallingConv::ARM_AAPCS_VFP },
361 { RTLIB::FPTOUINT_F32_I64, "__stou64", CallingConv::ARM_AAPCS_VFP },
362 { RTLIB::FPTOUINT_F64_I64, "__dtou64", CallingConv::ARM_AAPCS_VFP },
363 { RTLIB::SINTTOFP_I64_F32, "__i64tos", CallingConv::ARM_AAPCS_VFP },
364 { RTLIB::SINTTOFP_I64_F64, "__i64tod", CallingConv::ARM_AAPCS_VFP },
365 { RTLIB::UINTTOFP_I64_F32, "__u64tos", CallingConv::ARM_AAPCS_VFP },
366 { RTLIB::UINTTOFP_I64_F64, "__u64tod", CallingConv::ARM_AAPCS_VFP },
369 for (const auto &LC : LibraryCalls) {
370 setLibcallName(LC.Op, LC.Name);
371 setLibcallCallingConv(LC.Op, LC.CC);
375 // Use divmod compiler-rt calls for iOS 5.0 and later.
376 if (Subtarget->getTargetTriple().isiOS() &&
377 !Subtarget->getTargetTriple().isOSVersionLT(5, 0)) {
378 setLibcallName(RTLIB::SDIVREM_I32, "__divmodsi4");
379 setLibcallName(RTLIB::UDIVREM_I32, "__udivmodsi4");
382 // The half <-> float conversion functions are always soft-float, but are
383 // needed for some targets which use a hard-float calling convention by
385 if (Subtarget->isAAPCS_ABI()) {
386 setLibcallCallingConv(RTLIB::FPROUND_F32_F16, CallingConv::ARM_AAPCS);
387 setLibcallCallingConv(RTLIB::FPROUND_F64_F16, CallingConv::ARM_AAPCS);
388 setLibcallCallingConv(RTLIB::FPEXT_F16_F32, CallingConv::ARM_AAPCS);
390 setLibcallCallingConv(RTLIB::FPROUND_F32_F16, CallingConv::ARM_APCS);
391 setLibcallCallingConv(RTLIB::FPROUND_F64_F16, CallingConv::ARM_APCS);
392 setLibcallCallingConv(RTLIB::FPEXT_F16_F32, CallingConv::ARM_APCS);
395 if (Subtarget->isThumb1Only())
396 addRegisterClass(MVT::i32, &ARM::tGPRRegClass);
398 addRegisterClass(MVT::i32, &ARM::GPRRegClass);
399 if (!Subtarget->useSoftFloat() && Subtarget->hasVFP2() &&
400 !Subtarget->isThumb1Only()) {
401 addRegisterClass(MVT::f32, &ARM::SPRRegClass);
402 addRegisterClass(MVT::f64, &ARM::DPRRegClass);
405 for (MVT VT : MVT::vector_valuetypes()) {
406 for (MVT InnerVT : MVT::vector_valuetypes()) {
407 setTruncStoreAction(VT, InnerVT, Expand);
408 setLoadExtAction(ISD::SEXTLOAD, VT, InnerVT, Expand);
409 setLoadExtAction(ISD::ZEXTLOAD, VT, InnerVT, Expand);
410 setLoadExtAction(ISD::EXTLOAD, VT, InnerVT, Expand);
413 setOperationAction(ISD::MULHS, VT, Expand);
414 setOperationAction(ISD::SMUL_LOHI, VT, Expand);
415 setOperationAction(ISD::MULHU, VT, Expand);
416 setOperationAction(ISD::UMUL_LOHI, VT, Expand);
418 setOperationAction(ISD::BSWAP, VT, Expand);
421 setOperationAction(ISD::ConstantFP, MVT::f32, Custom);
422 setOperationAction(ISD::ConstantFP, MVT::f64, Custom);
424 setOperationAction(ISD::READ_REGISTER, MVT::i64, Custom);
425 setOperationAction(ISD::WRITE_REGISTER, MVT::i64, Custom);
427 if (Subtarget->hasNEON()) {
428 addDRTypeForNEON(MVT::v2f32);
429 addDRTypeForNEON(MVT::v8i8);
430 addDRTypeForNEON(MVT::v4i16);
431 addDRTypeForNEON(MVT::v2i32);
432 addDRTypeForNEON(MVT::v1i64);
434 addQRTypeForNEON(MVT::v4f32);
435 addQRTypeForNEON(MVT::v2f64);
436 addQRTypeForNEON(MVT::v16i8);
437 addQRTypeForNEON(MVT::v8i16);
438 addQRTypeForNEON(MVT::v4i32);
439 addQRTypeForNEON(MVT::v2i64);
441 // v2f64 is legal so that QR subregs can be extracted as f64 elements, but
442 // neither Neon nor VFP support any arithmetic operations on it.
443 // The same with v4f32. But keep in mind that vadd, vsub, vmul are natively
444 // supported for v4f32.
445 setOperationAction(ISD::FADD, MVT::v2f64, Expand);
446 setOperationAction(ISD::FSUB, MVT::v2f64, Expand);
447 setOperationAction(ISD::FMUL, MVT::v2f64, Expand);
448 // FIXME: Code duplication: FDIV and FREM are expanded always, see
449 // ARMTargetLowering::addTypeForNEON method for details.
450 setOperationAction(ISD::FDIV, MVT::v2f64, Expand);
451 setOperationAction(ISD::FREM, MVT::v2f64, Expand);
452 // FIXME: Create unittest.
453 // In another words, find a way when "copysign" appears in DAG with vector
455 setOperationAction(ISD::FCOPYSIGN, MVT::v2f64, Expand);
456 // FIXME: Code duplication: SETCC has custom operation action, see
457 // ARMTargetLowering::addTypeForNEON method for details.
458 setOperationAction(ISD::SETCC, MVT::v2f64, Expand);
459 // FIXME: Create unittest for FNEG and for FABS.
460 setOperationAction(ISD::FNEG, MVT::v2f64, Expand);
461 setOperationAction(ISD::FABS, MVT::v2f64, Expand);
462 setOperationAction(ISD::FSQRT, MVT::v2f64, Expand);
463 setOperationAction(ISD::FSIN, MVT::v2f64, Expand);
464 setOperationAction(ISD::FCOS, MVT::v2f64, Expand);
465 setOperationAction(ISD::FPOWI, MVT::v2f64, Expand);
466 setOperationAction(ISD::FPOW, MVT::v2f64, Expand);
467 setOperationAction(ISD::FLOG, MVT::v2f64, Expand);
468 setOperationAction(ISD::FLOG2, MVT::v2f64, Expand);
469 setOperationAction(ISD::FLOG10, MVT::v2f64, Expand);
470 setOperationAction(ISD::FEXP, MVT::v2f64, Expand);
471 setOperationAction(ISD::FEXP2, MVT::v2f64, Expand);
472 // FIXME: Create unittest for FCEIL, FTRUNC, FRINT, FNEARBYINT, FFLOOR.
473 setOperationAction(ISD::FCEIL, MVT::v2f64, Expand);
474 setOperationAction(ISD::FTRUNC, MVT::v2f64, Expand);
475 setOperationAction(ISD::FRINT, MVT::v2f64, Expand);
476 setOperationAction(ISD::FNEARBYINT, MVT::v2f64, Expand);
477 setOperationAction(ISD::FFLOOR, MVT::v2f64, Expand);
478 setOperationAction(ISD::FMA, MVT::v2f64, Expand);
480 setOperationAction(ISD::FSQRT, MVT::v4f32, Expand);
481 setOperationAction(ISD::FSIN, MVT::v4f32, Expand);
482 setOperationAction(ISD::FCOS, MVT::v4f32, Expand);
483 setOperationAction(ISD::FPOWI, MVT::v4f32, Expand);
484 setOperationAction(ISD::FPOW, MVT::v4f32, Expand);
485 setOperationAction(ISD::FLOG, MVT::v4f32, Expand);
486 setOperationAction(ISD::FLOG2, MVT::v4f32, Expand);
487 setOperationAction(ISD::FLOG10, MVT::v4f32, Expand);
488 setOperationAction(ISD::FEXP, MVT::v4f32, Expand);
489 setOperationAction(ISD::FEXP2, MVT::v4f32, Expand);
490 setOperationAction(ISD::FCEIL, MVT::v4f32, Expand);
491 setOperationAction(ISD::FTRUNC, MVT::v4f32, Expand);
492 setOperationAction(ISD::FRINT, MVT::v4f32, Expand);
493 setOperationAction(ISD::FNEARBYINT, MVT::v4f32, Expand);
494 setOperationAction(ISD::FFLOOR, MVT::v4f32, Expand);
496 // Mark v2f32 intrinsics.
497 setOperationAction(ISD::FSQRT, MVT::v2f32, Expand);
498 setOperationAction(ISD::FSIN, MVT::v2f32, Expand);
499 setOperationAction(ISD::FCOS, MVT::v2f32, Expand);
500 setOperationAction(ISD::FPOWI, MVT::v2f32, Expand);
501 setOperationAction(ISD::FPOW, MVT::v2f32, Expand);
502 setOperationAction(ISD::FLOG, MVT::v2f32, Expand);
503 setOperationAction(ISD::FLOG2, MVT::v2f32, Expand);
504 setOperationAction(ISD::FLOG10, MVT::v2f32, Expand);
505 setOperationAction(ISD::FEXP, MVT::v2f32, Expand);
506 setOperationAction(ISD::FEXP2, MVT::v2f32, Expand);
507 setOperationAction(ISD::FCEIL, MVT::v2f32, Expand);
508 setOperationAction(ISD::FTRUNC, MVT::v2f32, Expand);
509 setOperationAction(ISD::FRINT, MVT::v2f32, Expand);
510 setOperationAction(ISD::FNEARBYINT, MVT::v2f32, Expand);
511 setOperationAction(ISD::FFLOOR, MVT::v2f32, Expand);
513 // Neon does not support some operations on v1i64 and v2i64 types.
514 setOperationAction(ISD::MUL, MVT::v1i64, Expand);
515 // Custom handling for some quad-vector types to detect VMULL.
516 setOperationAction(ISD::MUL, MVT::v8i16, Custom);
517 setOperationAction(ISD::MUL, MVT::v4i32, Custom);
518 setOperationAction(ISD::MUL, MVT::v2i64, Custom);
519 // Custom handling for some vector types to avoid expensive expansions
520 setOperationAction(ISD::SDIV, MVT::v4i16, Custom);
521 setOperationAction(ISD::SDIV, MVT::v8i8, Custom);
522 setOperationAction(ISD::UDIV, MVT::v4i16, Custom);
523 setOperationAction(ISD::UDIV, MVT::v8i8, Custom);
524 setOperationAction(ISD::SETCC, MVT::v1i64, Expand);
525 setOperationAction(ISD::SETCC, MVT::v2i64, Expand);
526 // Neon does not have single instruction SINT_TO_FP and UINT_TO_FP with
527 // a destination type that is wider than the source, and nor does
528 // it have a FP_TO_[SU]INT instruction with a narrower destination than
530 setOperationAction(ISD::SINT_TO_FP, MVT::v4i16, Custom);
531 setOperationAction(ISD::UINT_TO_FP, MVT::v4i16, Custom);
532 setOperationAction(ISD::FP_TO_UINT, MVT::v4i16, Custom);
533 setOperationAction(ISD::FP_TO_SINT, MVT::v4i16, Custom);
535 setOperationAction(ISD::FP_ROUND, MVT::v2f32, Expand);
536 setOperationAction(ISD::FP_EXTEND, MVT::v2f64, Expand);
538 // NEON does not have single instruction CTPOP for vectors with element
539 // types wider than 8-bits. However, custom lowering can leverage the
540 // v8i8/v16i8 vcnt instruction.
541 setOperationAction(ISD::CTPOP, MVT::v2i32, Custom);
542 setOperationAction(ISD::CTPOP, MVT::v4i32, Custom);
543 setOperationAction(ISD::CTPOP, MVT::v4i16, Custom);
544 setOperationAction(ISD::CTPOP, MVT::v8i16, Custom);
546 // NEON does not have single instruction CTTZ for vectors.
547 setOperationAction(ISD::CTTZ, MVT::v8i8, Custom);
548 setOperationAction(ISD::CTTZ, MVT::v4i16, Custom);
549 setOperationAction(ISD::CTTZ, MVT::v2i32, Custom);
550 setOperationAction(ISD::CTTZ, MVT::v1i64, Custom);
552 setOperationAction(ISD::CTTZ, MVT::v16i8, Custom);
553 setOperationAction(ISD::CTTZ, MVT::v8i16, Custom);
554 setOperationAction(ISD::CTTZ, MVT::v4i32, Custom);
555 setOperationAction(ISD::CTTZ, MVT::v2i64, Custom);
557 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::v8i8, Custom);
558 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::v4i16, Custom);
559 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::v2i32, Custom);
560 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::v1i64, Custom);
562 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::v16i8, Custom);
563 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::v8i16, Custom);
564 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::v4i32, Custom);
565 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::v2i64, Custom);
567 // NEON only has FMA instructions as of VFP4.
568 if (!Subtarget->hasVFP4()) {
569 setOperationAction(ISD::FMA, MVT::v2f32, Expand);
570 setOperationAction(ISD::FMA, MVT::v4f32, Expand);
573 setTargetDAGCombine(ISD::INTRINSIC_VOID);
574 setTargetDAGCombine(ISD::INTRINSIC_W_CHAIN);
575 setTargetDAGCombine(ISD::INTRINSIC_WO_CHAIN);
576 setTargetDAGCombine(ISD::SHL);
577 setTargetDAGCombine(ISD::SRL);
578 setTargetDAGCombine(ISD::SRA);
579 setTargetDAGCombine(ISD::SIGN_EXTEND);
580 setTargetDAGCombine(ISD::ZERO_EXTEND);
581 setTargetDAGCombine(ISD::ANY_EXTEND);
582 setTargetDAGCombine(ISD::SELECT_CC);
583 setTargetDAGCombine(ISD::BUILD_VECTOR);
584 setTargetDAGCombine(ISD::VECTOR_SHUFFLE);
585 setTargetDAGCombine(ISD::INSERT_VECTOR_ELT);
586 setTargetDAGCombine(ISD::STORE);
587 setTargetDAGCombine(ISD::FP_TO_SINT);
588 setTargetDAGCombine(ISD::FP_TO_UINT);
589 setTargetDAGCombine(ISD::FDIV);
590 setTargetDAGCombine(ISD::LOAD);
592 // It is legal to extload from v4i8 to v4i16 or v4i32.
593 for (MVT Ty : {MVT::v8i8, MVT::v4i8, MVT::v2i8, MVT::v4i16, MVT::v2i16,
595 for (MVT VT : MVT::integer_vector_valuetypes()) {
596 setLoadExtAction(ISD::EXTLOAD, VT, Ty, Legal);
597 setLoadExtAction(ISD::ZEXTLOAD, VT, Ty, Legal);
598 setLoadExtAction(ISD::SEXTLOAD, VT, Ty, Legal);
603 // ARM and Thumb2 support UMLAL/SMLAL.
604 if (!Subtarget->isThumb1Only())
605 setTargetDAGCombine(ISD::ADDC);
607 if (Subtarget->isFPOnlySP()) {
608 // When targetting a floating-point unit with only single-precision
609 // operations, f64 is legal for the few double-precision instructions which
610 // are present However, no double-precision operations other than moves,
611 // loads and stores are provided by the hardware.
612 setOperationAction(ISD::FADD, MVT::f64, Expand);
613 setOperationAction(ISD::FSUB, MVT::f64, Expand);
614 setOperationAction(ISD::FMUL, MVT::f64, Expand);
615 setOperationAction(ISD::FMA, MVT::f64, Expand);
616 setOperationAction(ISD::FDIV, MVT::f64, Expand);
617 setOperationAction(ISD::FREM, MVT::f64, Expand);
618 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
619 setOperationAction(ISD::FGETSIGN, MVT::f64, Expand);
620 setOperationAction(ISD::FNEG, MVT::f64, Expand);
621 setOperationAction(ISD::FABS, MVT::f64, Expand);
622 setOperationAction(ISD::FSQRT, MVT::f64, Expand);
623 setOperationAction(ISD::FSIN, MVT::f64, Expand);
624 setOperationAction(ISD::FCOS, MVT::f64, Expand);
625 setOperationAction(ISD::FPOWI, MVT::f64, Expand);
626 setOperationAction(ISD::FPOW, MVT::f64, Expand);
627 setOperationAction(ISD::FLOG, MVT::f64, Expand);
628 setOperationAction(ISD::FLOG2, MVT::f64, Expand);
629 setOperationAction(ISD::FLOG10, MVT::f64, Expand);
630 setOperationAction(ISD::FEXP, MVT::f64, Expand);
631 setOperationAction(ISD::FEXP2, MVT::f64, Expand);
632 setOperationAction(ISD::FCEIL, MVT::f64, Expand);
633 setOperationAction(ISD::FTRUNC, MVT::f64, Expand);
634 setOperationAction(ISD::FRINT, MVT::f64, Expand);
635 setOperationAction(ISD::FNEARBYINT, MVT::f64, Expand);
636 setOperationAction(ISD::FFLOOR, MVT::f64, Expand);
637 setOperationAction(ISD::SINT_TO_FP, MVT::i32, Custom);
638 setOperationAction(ISD::UINT_TO_FP, MVT::i32, Custom);
639 setOperationAction(ISD::FP_TO_SINT, MVT::i32, Custom);
640 setOperationAction(ISD::FP_TO_UINT, MVT::i32, Custom);
641 setOperationAction(ISD::FP_TO_SINT, MVT::f64, Custom);
642 setOperationAction(ISD::FP_TO_UINT, MVT::f64, Custom);
643 setOperationAction(ISD::FP_ROUND, MVT::f32, Custom);
644 setOperationAction(ISD::FP_EXTEND, MVT::f64, Custom);
647 computeRegisterProperties(Subtarget->getRegisterInfo());
649 // ARM does not have floating-point extending loads.
650 for (MVT VT : MVT::fp_valuetypes()) {
651 setLoadExtAction(ISD::EXTLOAD, VT, MVT::f32, Expand);
652 setLoadExtAction(ISD::EXTLOAD, VT, MVT::f16, Expand);
655 // ... or truncating stores
656 setTruncStoreAction(MVT::f64, MVT::f32, Expand);
657 setTruncStoreAction(MVT::f32, MVT::f16, Expand);
658 setTruncStoreAction(MVT::f64, MVT::f16, Expand);
660 // ARM does not have i1 sign extending load.
661 for (MVT VT : MVT::integer_valuetypes())
662 setLoadExtAction(ISD::SEXTLOAD, VT, MVT::i1, Promote);
664 // ARM supports all 4 flavors of integer indexed load / store.
665 if (!Subtarget->isThumb1Only()) {
666 for (unsigned im = (unsigned)ISD::PRE_INC;
667 im != (unsigned)ISD::LAST_INDEXED_MODE; ++im) {
668 setIndexedLoadAction(im, MVT::i1, Legal);
669 setIndexedLoadAction(im, MVT::i8, Legal);
670 setIndexedLoadAction(im, MVT::i16, Legal);
671 setIndexedLoadAction(im, MVT::i32, Legal);
672 setIndexedStoreAction(im, MVT::i1, Legal);
673 setIndexedStoreAction(im, MVT::i8, Legal);
674 setIndexedStoreAction(im, MVT::i16, Legal);
675 setIndexedStoreAction(im, MVT::i32, Legal);
679 setOperationAction(ISD::SADDO, MVT::i32, Custom);
680 setOperationAction(ISD::UADDO, MVT::i32, Custom);
681 setOperationAction(ISD::SSUBO, MVT::i32, Custom);
682 setOperationAction(ISD::USUBO, MVT::i32, Custom);
684 // i64 operation support.
685 setOperationAction(ISD::MUL, MVT::i64, Expand);
686 setOperationAction(ISD::MULHU, MVT::i32, Expand);
687 if (Subtarget->isThumb1Only()) {
688 setOperationAction(ISD::UMUL_LOHI, MVT::i32, Expand);
689 setOperationAction(ISD::SMUL_LOHI, MVT::i32, Expand);
691 if (Subtarget->isThumb1Only() || !Subtarget->hasV6Ops()
692 || (Subtarget->isThumb2() && !Subtarget->hasThumb2DSP()))
693 setOperationAction(ISD::MULHS, MVT::i32, Expand);
695 setOperationAction(ISD::SHL_PARTS, MVT::i32, Custom);
696 setOperationAction(ISD::SRA_PARTS, MVT::i32, Custom);
697 setOperationAction(ISD::SRL_PARTS, MVT::i32, Custom);
698 setOperationAction(ISD::SRL, MVT::i64, Custom);
699 setOperationAction(ISD::SRA, MVT::i64, Custom);
701 if (!Subtarget->isThumb1Only()) {
702 // FIXME: We should do this for Thumb1 as well.
703 setOperationAction(ISD::ADDC, MVT::i32, Custom);
704 setOperationAction(ISD::ADDE, MVT::i32, Custom);
705 setOperationAction(ISD::SUBC, MVT::i32, Custom);
706 setOperationAction(ISD::SUBE, MVT::i32, Custom);
709 // ARM does not have ROTL.
710 setOperationAction(ISD::ROTL, MVT::i32, Expand);
711 setOperationAction(ISD::CTTZ, MVT::i32, Custom);
712 setOperationAction(ISD::CTPOP, MVT::i32, Expand);
713 if (!Subtarget->hasV5TOps() || Subtarget->isThumb1Only())
714 setOperationAction(ISD::CTLZ, MVT::i32, Expand);
716 // These just redirect to CTTZ and CTLZ on ARM.
717 setOperationAction(ISD::CTTZ_ZERO_UNDEF , MVT::i32 , Expand);
718 setOperationAction(ISD::CTLZ_ZERO_UNDEF , MVT::i32 , Expand);
720 setOperationAction(ISD::READCYCLECOUNTER, MVT::i64, Custom);
722 // Only ARMv6 has BSWAP.
723 if (!Subtarget->hasV6Ops())
724 setOperationAction(ISD::BSWAP, MVT::i32, Expand);
726 if (!(Subtarget->hasDivide() && Subtarget->isThumb2()) &&
727 !(Subtarget->hasDivideInARMMode() && !Subtarget->isThumb())) {
728 // These are expanded into libcalls if the cpu doesn't have HW divider.
729 setOperationAction(ISD::SDIV, MVT::i32, Expand);
730 setOperationAction(ISD::UDIV, MVT::i32, Expand);
733 // FIXME: Also set divmod for SREM on EABI
734 setOperationAction(ISD::SREM, MVT::i32, Expand);
735 setOperationAction(ISD::UREM, MVT::i32, Expand);
736 // Register based DivRem for AEABI (RTABI 4.2)
737 if (Subtarget->isTargetAEABI()) {
738 setLibcallName(RTLIB::SDIVREM_I8, "__aeabi_idivmod");
739 setLibcallName(RTLIB::SDIVREM_I16, "__aeabi_idivmod");
740 setLibcallName(RTLIB::SDIVREM_I32, "__aeabi_idivmod");
741 setLibcallName(RTLIB::SDIVREM_I64, "__aeabi_ldivmod");
742 setLibcallName(RTLIB::UDIVREM_I8, "__aeabi_uidivmod");
743 setLibcallName(RTLIB::UDIVREM_I16, "__aeabi_uidivmod");
744 setLibcallName(RTLIB::UDIVREM_I32, "__aeabi_uidivmod");
745 setLibcallName(RTLIB::UDIVREM_I64, "__aeabi_uldivmod");
747 setLibcallCallingConv(RTLIB::SDIVREM_I8, CallingConv::ARM_AAPCS);
748 setLibcallCallingConv(RTLIB::SDIVREM_I16, CallingConv::ARM_AAPCS);
749 setLibcallCallingConv(RTLIB::SDIVREM_I32, CallingConv::ARM_AAPCS);
750 setLibcallCallingConv(RTLIB::SDIVREM_I64, CallingConv::ARM_AAPCS);
751 setLibcallCallingConv(RTLIB::UDIVREM_I8, CallingConv::ARM_AAPCS);
752 setLibcallCallingConv(RTLIB::UDIVREM_I16, CallingConv::ARM_AAPCS);
753 setLibcallCallingConv(RTLIB::UDIVREM_I32, CallingConv::ARM_AAPCS);
754 setLibcallCallingConv(RTLIB::UDIVREM_I64, CallingConv::ARM_AAPCS);
756 setOperationAction(ISD::SDIVREM, MVT::i32, Custom);
757 setOperationAction(ISD::UDIVREM, MVT::i32, Custom);
759 setOperationAction(ISD::SDIVREM, MVT::i32, Expand);
760 setOperationAction(ISD::UDIVREM, MVT::i32, Expand);
763 setOperationAction(ISD::GlobalAddress, MVT::i32, Custom);
764 setOperationAction(ISD::ConstantPool, MVT::i32, Custom);
765 setOperationAction(ISD::GLOBAL_OFFSET_TABLE, MVT::i32, Custom);
766 setOperationAction(ISD::GlobalTLSAddress, MVT::i32, Custom);
767 setOperationAction(ISD::BlockAddress, MVT::i32, Custom);
769 setOperationAction(ISD::TRAP, MVT::Other, Legal);
771 // Use the default implementation.
772 setOperationAction(ISD::VASTART, MVT::Other, Custom);
773 setOperationAction(ISD::VAARG, MVT::Other, Expand);
774 setOperationAction(ISD::VACOPY, MVT::Other, Expand);
775 setOperationAction(ISD::VAEND, MVT::Other, Expand);
776 setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
777 setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
779 if (!Subtarget->isTargetMachO()) {
780 // Non-MachO platforms may return values in these registers via the
781 // personality function.
782 setExceptionPointerRegister(ARM::R0);
783 setExceptionSelectorRegister(ARM::R1);
786 if (Subtarget->getTargetTriple().isWindowsItaniumEnvironment())
787 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Custom);
789 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Expand);
791 // ARMv6 Thumb1 (except for CPUs that support dmb / dsb) and earlier use
792 // the default expansion. If we are targeting a single threaded system,
793 // then set them all for expand so we can lower them later into their
795 if (TM.Options.ThreadModel == ThreadModel::Single)
796 setOperationAction(ISD::ATOMIC_FENCE, MVT::Other, Expand);
797 else if (Subtarget->hasAnyDataBarrier() && !Subtarget->isThumb1Only()) {
798 // ATOMIC_FENCE needs custom lowering; the others should have been expanded
799 // to ldrex/strex loops already.
800 setOperationAction(ISD::ATOMIC_FENCE, MVT::Other, Custom);
802 // On v8, we have particularly efficient implementations of atomic fences
803 // if they can be combined with nearby atomic loads and stores.
804 if (!Subtarget->hasV8Ops()) {
805 // Automatically insert fences (dmb ish) around ATOMIC_SWAP etc.
806 setInsertFencesForAtomic(true);
809 // If there's anything we can use as a barrier, go through custom lowering
811 setOperationAction(ISD::ATOMIC_FENCE, MVT::Other,
812 Subtarget->hasAnyDataBarrier() ? Custom : Expand);
814 // Set them all for expansion, which will force libcalls.
815 setOperationAction(ISD::ATOMIC_CMP_SWAP, MVT::i32, Expand);
816 setOperationAction(ISD::ATOMIC_SWAP, MVT::i32, Expand);
817 setOperationAction(ISD::ATOMIC_LOAD_ADD, MVT::i32, Expand);
818 setOperationAction(ISD::ATOMIC_LOAD_SUB, MVT::i32, Expand);
819 setOperationAction(ISD::ATOMIC_LOAD_AND, MVT::i32, Expand);
820 setOperationAction(ISD::ATOMIC_LOAD_OR, MVT::i32, Expand);
821 setOperationAction(ISD::ATOMIC_LOAD_XOR, MVT::i32, Expand);
822 setOperationAction(ISD::ATOMIC_LOAD_NAND, MVT::i32, Expand);
823 setOperationAction(ISD::ATOMIC_LOAD_MIN, MVT::i32, Expand);
824 setOperationAction(ISD::ATOMIC_LOAD_MAX, MVT::i32, Expand);
825 setOperationAction(ISD::ATOMIC_LOAD_UMIN, MVT::i32, Expand);
826 setOperationAction(ISD::ATOMIC_LOAD_UMAX, MVT::i32, Expand);
827 // Mark ATOMIC_LOAD and ATOMIC_STORE custom so we can handle the
828 // Unordered/Monotonic case.
829 setOperationAction(ISD::ATOMIC_LOAD, MVT::i32, Custom);
830 setOperationAction(ISD::ATOMIC_STORE, MVT::i32, Custom);
833 setOperationAction(ISD::PREFETCH, MVT::Other, Custom);
835 // Requires SXTB/SXTH, available on v6 and up in both ARM and Thumb modes.
836 if (!Subtarget->hasV6Ops()) {
837 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16, Expand);
838 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8, Expand);
840 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1, Expand);
842 if (!Subtarget->useSoftFloat() && Subtarget->hasVFP2() &&
843 !Subtarget->isThumb1Only()) {
844 // Turn f64->i64 into VMOVRRD, i64 -> f64 to VMOVDRR
845 // iff target supports vfp2.
846 setOperationAction(ISD::BITCAST, MVT::i64, Custom);
847 setOperationAction(ISD::FLT_ROUNDS_, MVT::i32, Custom);
850 // We want to custom lower some of our intrinsics.
851 setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
852 if (Subtarget->isTargetDarwin()) {
853 setOperationAction(ISD::EH_SJLJ_SETJMP, MVT::i32, Custom);
854 setOperationAction(ISD::EH_SJLJ_LONGJMP, MVT::Other, Custom);
855 setLibcallName(RTLIB::UNWIND_RESUME, "_Unwind_SjLj_Resume");
858 setOperationAction(ISD::SETCC, MVT::i32, Expand);
859 setOperationAction(ISD::SETCC, MVT::f32, Expand);
860 setOperationAction(ISD::SETCC, MVT::f64, Expand);
861 setOperationAction(ISD::SELECT, MVT::i32, Custom);
862 setOperationAction(ISD::SELECT, MVT::f32, Custom);
863 setOperationAction(ISD::SELECT, MVT::f64, Custom);
864 setOperationAction(ISD::SELECT_CC, MVT::i32, Custom);
865 setOperationAction(ISD::SELECT_CC, MVT::f32, Custom);
866 setOperationAction(ISD::SELECT_CC, MVT::f64, Custom);
868 setOperationAction(ISD::BRCOND, MVT::Other, Expand);
869 setOperationAction(ISD::BR_CC, MVT::i32, Custom);
870 setOperationAction(ISD::BR_CC, MVT::f32, Custom);
871 setOperationAction(ISD::BR_CC, MVT::f64, Custom);
872 setOperationAction(ISD::BR_JT, MVT::Other, Custom);
874 // We don't support sin/cos/fmod/copysign/pow
875 setOperationAction(ISD::FSIN, MVT::f64, Expand);
876 setOperationAction(ISD::FSIN, MVT::f32, Expand);
877 setOperationAction(ISD::FCOS, MVT::f32, Expand);
878 setOperationAction(ISD::FCOS, MVT::f64, Expand);
879 setOperationAction(ISD::FSINCOS, MVT::f64, Expand);
880 setOperationAction(ISD::FSINCOS, MVT::f32, Expand);
881 setOperationAction(ISD::FREM, MVT::f64, Expand);
882 setOperationAction(ISD::FREM, MVT::f32, Expand);
883 if (!Subtarget->useSoftFloat() && Subtarget->hasVFP2() &&
884 !Subtarget->isThumb1Only()) {
885 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Custom);
886 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
888 setOperationAction(ISD::FPOW, MVT::f64, Expand);
889 setOperationAction(ISD::FPOW, MVT::f32, Expand);
891 if (!Subtarget->hasVFP4()) {
892 setOperationAction(ISD::FMA, MVT::f64, Expand);
893 setOperationAction(ISD::FMA, MVT::f32, Expand);
896 // Various VFP goodness
897 if (!Subtarget->useSoftFloat() && !Subtarget->isThumb1Only()) {
898 // FP-ARMv8 adds f64 <-> f16 conversion. Before that it should be expanded.
899 if (!Subtarget->hasFPARMv8() || Subtarget->isFPOnlySP()) {
900 setOperationAction(ISD::FP16_TO_FP, MVT::f64, Expand);
901 setOperationAction(ISD::FP_TO_FP16, MVT::f64, Expand);
904 // fp16 is a special v7 extension that adds f16 <-> f32 conversions.
905 if (!Subtarget->hasFP16()) {
906 setOperationAction(ISD::FP16_TO_FP, MVT::f32, Expand);
907 setOperationAction(ISD::FP_TO_FP16, MVT::f32, Expand);
911 // Combine sin / cos into one node or libcall if possible.
912 if (Subtarget->hasSinCos()) {
913 setLibcallName(RTLIB::SINCOS_F32, "sincosf");
914 setLibcallName(RTLIB::SINCOS_F64, "sincos");
915 if (Subtarget->getTargetTriple().isiOS()) {
916 // For iOS, we don't want to the normal expansion of a libcall to
917 // sincos. We want to issue a libcall to __sincos_stret.
918 setOperationAction(ISD::FSINCOS, MVT::f64, Custom);
919 setOperationAction(ISD::FSINCOS, MVT::f32, Custom);
923 // FP-ARMv8 implements a lot of rounding-like FP operations.
924 if (Subtarget->hasFPARMv8()) {
925 setOperationAction(ISD::FFLOOR, MVT::f32, Legal);
926 setOperationAction(ISD::FCEIL, MVT::f32, Legal);
927 setOperationAction(ISD::FROUND, MVT::f32, Legal);
928 setOperationAction(ISD::FTRUNC, MVT::f32, Legal);
929 setOperationAction(ISD::FNEARBYINT, MVT::f32, Legal);
930 setOperationAction(ISD::FRINT, MVT::f32, Legal);
931 if (!Subtarget->isFPOnlySP()) {
932 setOperationAction(ISD::FFLOOR, MVT::f64, Legal);
933 setOperationAction(ISD::FCEIL, MVT::f64, Legal);
934 setOperationAction(ISD::FROUND, MVT::f64, Legal);
935 setOperationAction(ISD::FTRUNC, MVT::f64, Legal);
936 setOperationAction(ISD::FNEARBYINT, MVT::f64, Legal);
937 setOperationAction(ISD::FRINT, MVT::f64, Legal);
940 // We have target-specific dag combine patterns for the following nodes:
941 // ARMISD::VMOVRRD - No need to call setTargetDAGCombine
942 setTargetDAGCombine(ISD::ADD);
943 setTargetDAGCombine(ISD::SUB);
944 setTargetDAGCombine(ISD::MUL);
945 setTargetDAGCombine(ISD::AND);
946 setTargetDAGCombine(ISD::OR);
947 setTargetDAGCombine(ISD::XOR);
949 if (Subtarget->hasV6Ops())
950 setTargetDAGCombine(ISD::SRL);
952 setStackPointerRegisterToSaveRestore(ARM::SP);
954 if (Subtarget->useSoftFloat() || Subtarget->isThumb1Only() ||
955 !Subtarget->hasVFP2())
956 setSchedulingPreference(Sched::RegPressure);
958 setSchedulingPreference(Sched::Hybrid);
960 //// temporary - rewrite interface to use type
961 MaxStoresPerMemset = 8;
962 MaxStoresPerMemsetOptSize = Subtarget->isTargetDarwin() ? 8 : 4;
963 MaxStoresPerMemcpy = 4; // For @llvm.memcpy -> sequence of stores
964 MaxStoresPerMemcpyOptSize = Subtarget->isTargetDarwin() ? 4 : 2;
965 MaxStoresPerMemmove = 4; // For @llvm.memmove -> sequence of stores
966 MaxStoresPerMemmoveOptSize = Subtarget->isTargetDarwin() ? 4 : 2;
968 // On ARM arguments smaller than 4 bytes are extended, so all arguments
969 // are at least 4 bytes aligned.
970 setMinStackArgumentAlignment(4);
972 // Prefer likely predicted branches to selects on out-of-order cores.
973 PredictableSelectIsExpensive = Subtarget->isLikeA9();
975 setMinFunctionAlignment(Subtarget->isThumb() ? 1 : 2);
978 bool ARMTargetLowering::useSoftFloat() const {
979 return Subtarget->useSoftFloat();
982 // FIXME: It might make sense to define the representative register class as the
983 // nearest super-register that has a non-null superset. For example, DPR_VFP2 is
984 // a super-register of SPR, and DPR is a superset if DPR_VFP2. Consequently,
985 // SPR's representative would be DPR_VFP2. This should work well if register
986 // pressure tracking were modified such that a register use would increment the
987 // pressure of the register class's representative and all of it's super
988 // classes' representatives transitively. We have not implemented this because
989 // of the difficulty prior to coalescing of modeling operand register classes
990 // due to the common occurrence of cross class copies and subregister insertions
992 std::pair<const TargetRegisterClass *, uint8_t>
993 ARMTargetLowering::findRepresentativeClass(const TargetRegisterInfo *TRI,
995 const TargetRegisterClass *RRC = nullptr;
997 switch (VT.SimpleTy) {
999 return TargetLowering::findRepresentativeClass(TRI, VT);
1000 // Use DPR as representative register class for all floating point
1001 // and vector types. Since there are 32 SPR registers and 32 DPR registers so
1002 // the cost is 1 for both f32 and f64.
1003 case MVT::f32: case MVT::f64: case MVT::v8i8: case MVT::v4i16:
1004 case MVT::v2i32: case MVT::v1i64: case MVT::v2f32:
1005 RRC = &ARM::DPRRegClass;
1006 // When NEON is used for SP, only half of the register file is available
1007 // because operations that define both SP and DP results will be constrained
1008 // to the VFP2 class (D0-D15). We currently model this constraint prior to
1009 // coalescing by double-counting the SP regs. See the FIXME above.
1010 if (Subtarget->useNEONForSinglePrecisionFP())
1013 case MVT::v16i8: case MVT::v8i16: case MVT::v4i32: case MVT::v2i64:
1014 case MVT::v4f32: case MVT::v2f64:
1015 RRC = &ARM::DPRRegClass;
1019 RRC = &ARM::DPRRegClass;
1023 RRC = &ARM::DPRRegClass;
1027 return std::make_pair(RRC, Cost);
1030 const char *ARMTargetLowering::getTargetNodeName(unsigned Opcode) const {
1031 switch ((ARMISD::NodeType)Opcode) {
1032 case ARMISD::FIRST_NUMBER: break;
1033 case ARMISD::Wrapper: return "ARMISD::Wrapper";
1034 case ARMISD::WrapperPIC: return "ARMISD::WrapperPIC";
1035 case ARMISD::WrapperJT: return "ARMISD::WrapperJT";
1036 case ARMISD::COPY_STRUCT_BYVAL: return "ARMISD::COPY_STRUCT_BYVAL";
1037 case ARMISD::CALL: return "ARMISD::CALL";
1038 case ARMISD::CALL_PRED: return "ARMISD::CALL_PRED";
1039 case ARMISD::CALL_NOLINK: return "ARMISD::CALL_NOLINK";
1040 case ARMISD::tCALL: return "ARMISD::tCALL";
1041 case ARMISD::BRCOND: return "ARMISD::BRCOND";
1042 case ARMISD::BR_JT: return "ARMISD::BR_JT";
1043 case ARMISD::BR2_JT: return "ARMISD::BR2_JT";
1044 case ARMISD::RET_FLAG: return "ARMISD::RET_FLAG";
1045 case ARMISD::INTRET_FLAG: return "ARMISD::INTRET_FLAG";
1046 case ARMISD::PIC_ADD: return "ARMISD::PIC_ADD";
1047 case ARMISD::CMP: return "ARMISD::CMP";
1048 case ARMISD::CMN: return "ARMISD::CMN";
1049 case ARMISD::CMPZ: return "ARMISD::CMPZ";
1050 case ARMISD::CMPFP: return "ARMISD::CMPFP";
1051 case ARMISD::CMPFPw0: return "ARMISD::CMPFPw0";
1052 case ARMISD::BCC_i64: return "ARMISD::BCC_i64";
1053 case ARMISD::FMSTAT: return "ARMISD::FMSTAT";
1055 case ARMISD::CMOV: return "ARMISD::CMOV";
1057 case ARMISD::RBIT: return "ARMISD::RBIT";
1059 case ARMISD::SRL_FLAG: return "ARMISD::SRL_FLAG";
1060 case ARMISD::SRA_FLAG: return "ARMISD::SRA_FLAG";
1061 case ARMISD::RRX: return "ARMISD::RRX";
1063 case ARMISD::ADDC: return "ARMISD::ADDC";
1064 case ARMISD::ADDE: return "ARMISD::ADDE";
1065 case ARMISD::SUBC: return "ARMISD::SUBC";
1066 case ARMISD::SUBE: return "ARMISD::SUBE";
1068 case ARMISD::VMOVRRD: return "ARMISD::VMOVRRD";
1069 case ARMISD::VMOVDRR: return "ARMISD::VMOVDRR";
1071 case ARMISD::EH_SJLJ_SETJMP: return "ARMISD::EH_SJLJ_SETJMP";
1072 case ARMISD::EH_SJLJ_LONGJMP:return "ARMISD::EH_SJLJ_LONGJMP";
1074 case ARMISD::TC_RETURN: return "ARMISD::TC_RETURN";
1076 case ARMISD::THREAD_POINTER:return "ARMISD::THREAD_POINTER";
1078 case ARMISD::DYN_ALLOC: return "ARMISD::DYN_ALLOC";
1080 case ARMISD::MEMBARRIER_MCR: return "ARMISD::MEMBARRIER_MCR";
1082 case ARMISD::PRELOAD: return "ARMISD::PRELOAD";
1084 case ARMISD::WIN__CHKSTK: return "ARMISD:::WIN__CHKSTK";
1086 case ARMISD::VCEQ: return "ARMISD::VCEQ";
1087 case ARMISD::VCEQZ: return "ARMISD::VCEQZ";
1088 case ARMISD::VCGE: return "ARMISD::VCGE";
1089 case ARMISD::VCGEZ: return "ARMISD::VCGEZ";
1090 case ARMISD::VCLEZ: return "ARMISD::VCLEZ";
1091 case ARMISD::VCGEU: return "ARMISD::VCGEU";
1092 case ARMISD::VCGT: return "ARMISD::VCGT";
1093 case ARMISD::VCGTZ: return "ARMISD::VCGTZ";
1094 case ARMISD::VCLTZ: return "ARMISD::VCLTZ";
1095 case ARMISD::VCGTU: return "ARMISD::VCGTU";
1096 case ARMISD::VTST: return "ARMISD::VTST";
1098 case ARMISD::VSHL: return "ARMISD::VSHL";
1099 case ARMISD::VSHRs: return "ARMISD::VSHRs";
1100 case ARMISD::VSHRu: return "ARMISD::VSHRu";
1101 case ARMISD::VRSHRs: return "ARMISD::VRSHRs";
1102 case ARMISD::VRSHRu: return "ARMISD::VRSHRu";
1103 case ARMISD::VRSHRN: return "ARMISD::VRSHRN";
1104 case ARMISD::VQSHLs: return "ARMISD::VQSHLs";
1105 case ARMISD::VQSHLu: return "ARMISD::VQSHLu";
1106 case ARMISD::VQSHLsu: return "ARMISD::VQSHLsu";
1107 case ARMISD::VQSHRNs: return "ARMISD::VQSHRNs";
1108 case ARMISD::VQSHRNu: return "ARMISD::VQSHRNu";
1109 case ARMISD::VQSHRNsu: return "ARMISD::VQSHRNsu";
1110 case ARMISD::VQRSHRNs: return "ARMISD::VQRSHRNs";
1111 case ARMISD::VQRSHRNu: return "ARMISD::VQRSHRNu";
1112 case ARMISD::VQRSHRNsu: return "ARMISD::VQRSHRNsu";
1113 case ARMISD::VSLI: return "ARMISD::VSLI";
1114 case ARMISD::VSRI: return "ARMISD::VSRI";
1115 case ARMISD::VGETLANEu: return "ARMISD::VGETLANEu";
1116 case ARMISD::VGETLANEs: return "ARMISD::VGETLANEs";
1117 case ARMISD::VMOVIMM: return "ARMISD::VMOVIMM";
1118 case ARMISD::VMVNIMM: return "ARMISD::VMVNIMM";
1119 case ARMISD::VMOVFPIMM: return "ARMISD::VMOVFPIMM";
1120 case ARMISD::VDUP: return "ARMISD::VDUP";
1121 case ARMISD::VDUPLANE: return "ARMISD::VDUPLANE";
1122 case ARMISD::VEXT: return "ARMISD::VEXT";
1123 case ARMISD::VREV64: return "ARMISD::VREV64";
1124 case ARMISD::VREV32: return "ARMISD::VREV32";
1125 case ARMISD::VREV16: return "ARMISD::VREV16";
1126 case ARMISD::VZIP: return "ARMISD::VZIP";
1127 case ARMISD::VUZP: return "ARMISD::VUZP";
1128 case ARMISD::VTRN: return "ARMISD::VTRN";
1129 case ARMISD::VTBL1: return "ARMISD::VTBL1";
1130 case ARMISD::VTBL2: return "ARMISD::VTBL2";
1131 case ARMISD::VMULLs: return "ARMISD::VMULLs";
1132 case ARMISD::VMULLu: return "ARMISD::VMULLu";
1133 case ARMISD::UMLAL: return "ARMISD::UMLAL";
1134 case ARMISD::SMLAL: return "ARMISD::SMLAL";
1135 case ARMISD::BUILD_VECTOR: return "ARMISD::BUILD_VECTOR";
1136 case ARMISD::FMAX: return "ARMISD::FMAX";
1137 case ARMISD::FMIN: return "ARMISD::FMIN";
1138 case ARMISD::VMAXNM: return "ARMISD::VMAX";
1139 case ARMISD::VMINNM: return "ARMISD::VMIN";
1140 case ARMISD::BFI: return "ARMISD::BFI";
1141 case ARMISD::VORRIMM: return "ARMISD::VORRIMM";
1142 case ARMISD::VBICIMM: return "ARMISD::VBICIMM";
1143 case ARMISD::VBSL: return "ARMISD::VBSL";
1144 case ARMISD::VLD2DUP: return "ARMISD::VLD2DUP";
1145 case ARMISD::VLD3DUP: return "ARMISD::VLD3DUP";
1146 case ARMISD::VLD4DUP: return "ARMISD::VLD4DUP";
1147 case ARMISD::VLD1_UPD: return "ARMISD::VLD1_UPD";
1148 case ARMISD::VLD2_UPD: return "ARMISD::VLD2_UPD";
1149 case ARMISD::VLD3_UPD: return "ARMISD::VLD3_UPD";
1150 case ARMISD::VLD4_UPD: return "ARMISD::VLD4_UPD";
1151 case ARMISD::VLD2LN_UPD: return "ARMISD::VLD2LN_UPD";
1152 case ARMISD::VLD3LN_UPD: return "ARMISD::VLD3LN_UPD";
1153 case ARMISD::VLD4LN_UPD: return "ARMISD::VLD4LN_UPD";
1154 case ARMISD::VLD2DUP_UPD: return "ARMISD::VLD2DUP_UPD";
1155 case ARMISD::VLD3DUP_UPD: return "ARMISD::VLD3DUP_UPD";
1156 case ARMISD::VLD4DUP_UPD: return "ARMISD::VLD4DUP_UPD";
1157 case ARMISD::VST1_UPD: return "ARMISD::VST1_UPD";
1158 case ARMISD::VST2_UPD: return "ARMISD::VST2_UPD";
1159 case ARMISD::VST3_UPD: return "ARMISD::VST3_UPD";
1160 case ARMISD::VST4_UPD: return "ARMISD::VST4_UPD";
1161 case ARMISD::VST2LN_UPD: return "ARMISD::VST2LN_UPD";
1162 case ARMISD::VST3LN_UPD: return "ARMISD::VST3LN_UPD";
1163 case ARMISD::VST4LN_UPD: return "ARMISD::VST4LN_UPD";
1168 EVT ARMTargetLowering::getSetCCResultType(const DataLayout &DL, LLVMContext &,
1171 return getPointerTy(DL);
1172 return VT.changeVectorElementTypeToInteger();
1175 /// getRegClassFor - Return the register class that should be used for the
1176 /// specified value type.
1177 const TargetRegisterClass *ARMTargetLowering::getRegClassFor(MVT VT) const {
1178 // Map v4i64 to QQ registers but do not make the type legal. Similarly map
1179 // v8i64 to QQQQ registers. v4i64 and v8i64 are only used for REG_SEQUENCE to
1180 // load / store 4 to 8 consecutive D registers.
1181 if (Subtarget->hasNEON()) {
1182 if (VT == MVT::v4i64)
1183 return &ARM::QQPRRegClass;
1184 if (VT == MVT::v8i64)
1185 return &ARM::QQQQPRRegClass;
1187 return TargetLowering::getRegClassFor(VT);
1190 // memcpy, and other memory intrinsics, typically tries to use LDM/STM if the
1191 // source/dest is aligned and the copy size is large enough. We therefore want
1192 // to align such objects passed to memory intrinsics.
1193 bool ARMTargetLowering::shouldAlignPointerArgs(CallInst *CI, unsigned &MinSize,
1194 unsigned &PrefAlign) const {
1195 if (!isa<MemIntrinsic>(CI))
1198 // On ARM11 onwards (excluding M class) 8-byte aligned LDM is typically 1
1199 // cycle faster than 4-byte aligned LDM.
1200 PrefAlign = (Subtarget->hasV6Ops() && !Subtarget->isMClass() ? 8 : 4);
1204 // Create a fast isel object.
1206 ARMTargetLowering::createFastISel(FunctionLoweringInfo &funcInfo,
1207 const TargetLibraryInfo *libInfo) const {
1208 return ARM::createFastISel(funcInfo, libInfo);
1211 Sched::Preference ARMTargetLowering::getSchedulingPreference(SDNode *N) const {
1212 unsigned NumVals = N->getNumValues();
1214 return Sched::RegPressure;
1216 for (unsigned i = 0; i != NumVals; ++i) {
1217 EVT VT = N->getValueType(i);
1218 if (VT == MVT::Glue || VT == MVT::Other)
1220 if (VT.isFloatingPoint() || VT.isVector())
1224 if (!N->isMachineOpcode())
1225 return Sched::RegPressure;
1227 // Load are scheduled for latency even if there instruction itinerary
1228 // is not available.
1229 const TargetInstrInfo *TII = Subtarget->getInstrInfo();
1230 const MCInstrDesc &MCID = TII->get(N->getMachineOpcode());
1232 if (MCID.getNumDefs() == 0)
1233 return Sched::RegPressure;
1234 if (!Itins->isEmpty() &&
1235 Itins->getOperandCycle(MCID.getSchedClass(), 0) > 2)
1238 return Sched::RegPressure;
1241 //===----------------------------------------------------------------------===//
1243 //===----------------------------------------------------------------------===//
1245 /// IntCCToARMCC - Convert a DAG integer condition code to an ARM CC
1246 static ARMCC::CondCodes IntCCToARMCC(ISD::CondCode CC) {
1248 default: llvm_unreachable("Unknown condition code!");
1249 case ISD::SETNE: return ARMCC::NE;
1250 case ISD::SETEQ: return ARMCC::EQ;
1251 case ISD::SETGT: return ARMCC::GT;
1252 case ISD::SETGE: return ARMCC::GE;
1253 case ISD::SETLT: return ARMCC::LT;
1254 case ISD::SETLE: return ARMCC::LE;
1255 case ISD::SETUGT: return ARMCC::HI;
1256 case ISD::SETUGE: return ARMCC::HS;
1257 case ISD::SETULT: return ARMCC::LO;
1258 case ISD::SETULE: return ARMCC::LS;
1262 /// FPCCToARMCC - Convert a DAG fp condition code to an ARM CC.
1263 static void FPCCToARMCC(ISD::CondCode CC, ARMCC::CondCodes &CondCode,
1264 ARMCC::CondCodes &CondCode2) {
1265 CondCode2 = ARMCC::AL;
1267 default: llvm_unreachable("Unknown FP condition!");
1269 case ISD::SETOEQ: CondCode = ARMCC::EQ; break;
1271 case ISD::SETOGT: CondCode = ARMCC::GT; break;
1273 case ISD::SETOGE: CondCode = ARMCC::GE; break;
1274 case ISD::SETOLT: CondCode = ARMCC::MI; break;
1275 case ISD::SETOLE: CondCode = ARMCC::LS; break;
1276 case ISD::SETONE: CondCode = ARMCC::MI; CondCode2 = ARMCC::GT; break;
1277 case ISD::SETO: CondCode = ARMCC::VC; break;
1278 case ISD::SETUO: CondCode = ARMCC::VS; break;
1279 case ISD::SETUEQ: CondCode = ARMCC::EQ; CondCode2 = ARMCC::VS; break;
1280 case ISD::SETUGT: CondCode = ARMCC::HI; break;
1281 case ISD::SETUGE: CondCode = ARMCC::PL; break;
1283 case ISD::SETULT: CondCode = ARMCC::LT; break;
1285 case ISD::SETULE: CondCode = ARMCC::LE; break;
1287 case ISD::SETUNE: CondCode = ARMCC::NE; break;
1291 //===----------------------------------------------------------------------===//
1292 // Calling Convention Implementation
1293 //===----------------------------------------------------------------------===//
1295 #include "ARMGenCallingConv.inc"
1297 /// getEffectiveCallingConv - Get the effective calling convention, taking into
1298 /// account presence of floating point hardware and calling convention
1299 /// limitations, such as support for variadic functions.
1301 ARMTargetLowering::getEffectiveCallingConv(CallingConv::ID CC,
1302 bool isVarArg) const {
1305 llvm_unreachable("Unsupported calling convention");
1306 case CallingConv::ARM_AAPCS:
1307 case CallingConv::ARM_APCS:
1308 case CallingConv::GHC:
1310 case CallingConv::ARM_AAPCS_VFP:
1311 return isVarArg ? CallingConv::ARM_AAPCS : CallingConv::ARM_AAPCS_VFP;
1312 case CallingConv::C:
1313 if (!Subtarget->isAAPCS_ABI())
1314 return CallingConv::ARM_APCS;
1315 else if (Subtarget->hasVFP2() && !Subtarget->isThumb1Only() &&
1316 getTargetMachine().Options.FloatABIType == FloatABI::Hard &&
1318 return CallingConv::ARM_AAPCS_VFP;
1320 return CallingConv::ARM_AAPCS;
1321 case CallingConv::Fast:
1322 if (!Subtarget->isAAPCS_ABI()) {
1323 if (Subtarget->hasVFP2() && !Subtarget->isThumb1Only() && !isVarArg)
1324 return CallingConv::Fast;
1325 return CallingConv::ARM_APCS;
1326 } else if (Subtarget->hasVFP2() && !Subtarget->isThumb1Only() && !isVarArg)
1327 return CallingConv::ARM_AAPCS_VFP;
1329 return CallingConv::ARM_AAPCS;
1333 /// CCAssignFnForNode - Selects the correct CCAssignFn for the given
1334 /// CallingConvention.
1335 CCAssignFn *ARMTargetLowering::CCAssignFnForNode(CallingConv::ID CC,
1337 bool isVarArg) const {
1338 switch (getEffectiveCallingConv(CC, isVarArg)) {
1340 llvm_unreachable("Unsupported calling convention");
1341 case CallingConv::ARM_APCS:
1342 return (Return ? RetCC_ARM_APCS : CC_ARM_APCS);
1343 case CallingConv::ARM_AAPCS:
1344 return (Return ? RetCC_ARM_AAPCS : CC_ARM_AAPCS);
1345 case CallingConv::ARM_AAPCS_VFP:
1346 return (Return ? RetCC_ARM_AAPCS_VFP : CC_ARM_AAPCS_VFP);
1347 case CallingConv::Fast:
1348 return (Return ? RetFastCC_ARM_APCS : FastCC_ARM_APCS);
1349 case CallingConv::GHC:
1350 return (Return ? RetCC_ARM_APCS : CC_ARM_APCS_GHC);
1354 /// LowerCallResult - Lower the result values of a call into the
1355 /// appropriate copies out of appropriate physical registers.
1357 ARMTargetLowering::LowerCallResult(SDValue Chain, SDValue InFlag,
1358 CallingConv::ID CallConv, bool isVarArg,
1359 const SmallVectorImpl<ISD::InputArg> &Ins,
1360 SDLoc dl, SelectionDAG &DAG,
1361 SmallVectorImpl<SDValue> &InVals,
1362 bool isThisReturn, SDValue ThisVal) const {
1364 // Assign locations to each value returned by this call.
1365 SmallVector<CCValAssign, 16> RVLocs;
1366 ARMCCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(), RVLocs,
1367 *DAG.getContext(), Call);
1368 CCInfo.AnalyzeCallResult(Ins,
1369 CCAssignFnForNode(CallConv, /* Return*/ true,
1372 // Copy all of the result registers out of their specified physreg.
1373 for (unsigned i = 0; i != RVLocs.size(); ++i) {
1374 CCValAssign VA = RVLocs[i];
1376 // Pass 'this' value directly from the argument to return value, to avoid
1377 // reg unit interference
1378 if (i == 0 && isThisReturn) {
1379 assert(!VA.needsCustom() && VA.getLocVT() == MVT::i32 &&
1380 "unexpected return calling convention register assignment");
1381 InVals.push_back(ThisVal);
1386 if (VA.needsCustom()) {
1387 // Handle f64 or half of a v2f64.
1388 SDValue Lo = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32,
1390 Chain = Lo.getValue(1);
1391 InFlag = Lo.getValue(2);
1392 VA = RVLocs[++i]; // skip ahead to next loc
1393 SDValue Hi = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32,
1395 Chain = Hi.getValue(1);
1396 InFlag = Hi.getValue(2);
1397 if (!Subtarget->isLittle())
1399 Val = DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi);
1401 if (VA.getLocVT() == MVT::v2f64) {
1402 SDValue Vec = DAG.getNode(ISD::UNDEF, dl, MVT::v2f64);
1403 Vec = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Vec, Val,
1404 DAG.getConstant(0, dl, MVT::i32));
1406 VA = RVLocs[++i]; // skip ahead to next loc
1407 Lo = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32, InFlag);
1408 Chain = Lo.getValue(1);
1409 InFlag = Lo.getValue(2);
1410 VA = RVLocs[++i]; // skip ahead to next loc
1411 Hi = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32, InFlag);
1412 Chain = Hi.getValue(1);
1413 InFlag = Hi.getValue(2);
1414 if (!Subtarget->isLittle())
1416 Val = DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi);
1417 Val = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Vec, Val,
1418 DAG.getConstant(1, dl, MVT::i32));
1421 Val = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), VA.getLocVT(),
1423 Chain = Val.getValue(1);
1424 InFlag = Val.getValue(2);
1427 switch (VA.getLocInfo()) {
1428 default: llvm_unreachable("Unknown loc info!");
1429 case CCValAssign::Full: break;
1430 case CCValAssign::BCvt:
1431 Val = DAG.getNode(ISD::BITCAST, dl, VA.getValVT(), Val);
1435 InVals.push_back(Val);
1441 /// LowerMemOpCallTo - Store the argument to the stack.
1443 ARMTargetLowering::LowerMemOpCallTo(SDValue Chain,
1444 SDValue StackPtr, SDValue Arg,
1445 SDLoc dl, SelectionDAG &DAG,
1446 const CCValAssign &VA,
1447 ISD::ArgFlagsTy Flags) const {
1448 unsigned LocMemOffset = VA.getLocMemOffset();
1449 SDValue PtrOff = DAG.getIntPtrConstant(LocMemOffset, dl);
1450 PtrOff = DAG.getNode(ISD::ADD, dl, getPointerTy(DAG.getDataLayout()),
1452 return DAG.getStore(Chain, dl, Arg, PtrOff,
1453 MachinePointerInfo::getStack(LocMemOffset),
1457 void ARMTargetLowering::PassF64ArgInRegs(SDLoc dl, SelectionDAG &DAG,
1458 SDValue Chain, SDValue &Arg,
1459 RegsToPassVector &RegsToPass,
1460 CCValAssign &VA, CCValAssign &NextVA,
1462 SmallVectorImpl<SDValue> &MemOpChains,
1463 ISD::ArgFlagsTy Flags) const {
1465 SDValue fmrrd = DAG.getNode(ARMISD::VMOVRRD, dl,
1466 DAG.getVTList(MVT::i32, MVT::i32), Arg);
1467 unsigned id = Subtarget->isLittle() ? 0 : 1;
1468 RegsToPass.push_back(std::make_pair(VA.getLocReg(), fmrrd.getValue(id)));
1470 if (NextVA.isRegLoc())
1471 RegsToPass.push_back(std::make_pair(NextVA.getLocReg(), fmrrd.getValue(1-id)));
1473 assert(NextVA.isMemLoc());
1474 if (!StackPtr.getNode())
1475 StackPtr = DAG.getCopyFromReg(Chain, dl, ARM::SP,
1476 getPointerTy(DAG.getDataLayout()));
1478 MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, fmrrd.getValue(1-id),
1484 /// LowerCall - Lowering a call into a callseq_start <-
1485 /// ARMISD:CALL <- callseq_end chain. Also add input and output parameter
1488 ARMTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI,
1489 SmallVectorImpl<SDValue> &InVals) const {
1490 SelectionDAG &DAG = CLI.DAG;
1492 SmallVectorImpl<ISD::OutputArg> &Outs = CLI.Outs;
1493 SmallVectorImpl<SDValue> &OutVals = CLI.OutVals;
1494 SmallVectorImpl<ISD::InputArg> &Ins = CLI.Ins;
1495 SDValue Chain = CLI.Chain;
1496 SDValue Callee = CLI.Callee;
1497 bool &isTailCall = CLI.IsTailCall;
1498 CallingConv::ID CallConv = CLI.CallConv;
1499 bool doesNotRet = CLI.DoesNotReturn;
1500 bool isVarArg = CLI.IsVarArg;
1502 MachineFunction &MF = DAG.getMachineFunction();
1503 bool isStructRet = (Outs.empty()) ? false : Outs[0].Flags.isSRet();
1504 bool isThisReturn = false;
1505 bool isSibCall = false;
1506 auto Attr = MF.getFunction()->getFnAttribute("disable-tail-calls");
1508 // Disable tail calls if they're not supported.
1509 if (!Subtarget->supportsTailCall() || Attr.getValueAsString() == "true")
1513 // Check if it's really possible to do a tail call.
1514 isTailCall = IsEligibleForTailCallOptimization(Callee, CallConv,
1515 isVarArg, isStructRet, MF.getFunction()->hasStructRetAttr(),
1516 Outs, OutVals, Ins, DAG);
1517 if (!isTailCall && CLI.CS && CLI.CS->isMustTailCall())
1518 report_fatal_error("failed to perform tail call elimination on a call "
1519 "site marked musttail");
1520 // We don't support GuaranteedTailCallOpt for ARM, only automatically
1521 // detected sibcalls.
1528 // Analyze operands of the call, assigning locations to each operand.
1529 SmallVector<CCValAssign, 16> ArgLocs;
1530 ARMCCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(), ArgLocs,
1531 *DAG.getContext(), Call);
1532 CCInfo.AnalyzeCallOperands(Outs,
1533 CCAssignFnForNode(CallConv, /* Return*/ false,
1536 // Get a count of how many bytes are to be pushed on the stack.
1537 unsigned NumBytes = CCInfo.getNextStackOffset();
1539 // For tail calls, memory operands are available in our caller's stack.
1543 // Adjust the stack pointer for the new arguments...
1544 // These operations are automatically eliminated by the prolog/epilog pass
1546 Chain = DAG.getCALLSEQ_START(Chain,
1547 DAG.getIntPtrConstant(NumBytes, dl, true), dl);
1550 DAG.getCopyFromReg(Chain, dl, ARM::SP, getPointerTy(DAG.getDataLayout()));
1552 RegsToPassVector RegsToPass;
1553 SmallVector<SDValue, 8> MemOpChains;
1555 // Walk the register/memloc assignments, inserting copies/loads. In the case
1556 // of tail call optimization, arguments are handled later.
1557 for (unsigned i = 0, realArgIdx = 0, e = ArgLocs.size();
1559 ++i, ++realArgIdx) {
1560 CCValAssign &VA = ArgLocs[i];
1561 SDValue Arg = OutVals[realArgIdx];
1562 ISD::ArgFlagsTy Flags = Outs[realArgIdx].Flags;
1563 bool isByVal = Flags.isByVal();
1565 // Promote the value if needed.
1566 switch (VA.getLocInfo()) {
1567 default: llvm_unreachable("Unknown loc info!");
1568 case CCValAssign::Full: break;
1569 case CCValAssign::SExt:
1570 Arg = DAG.getNode(ISD::SIGN_EXTEND, dl, VA.getLocVT(), Arg);
1572 case CCValAssign::ZExt:
1573 Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, VA.getLocVT(), Arg);
1575 case CCValAssign::AExt:
1576 Arg = DAG.getNode(ISD::ANY_EXTEND, dl, VA.getLocVT(), Arg);
1578 case CCValAssign::BCvt:
1579 Arg = DAG.getNode(ISD::BITCAST, dl, VA.getLocVT(), Arg);
1583 // f64 and v2f64 might be passed in i32 pairs and must be split into pieces
1584 if (VA.needsCustom()) {
1585 if (VA.getLocVT() == MVT::v2f64) {
1586 SDValue Op0 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg,
1587 DAG.getConstant(0, dl, MVT::i32));
1588 SDValue Op1 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg,
1589 DAG.getConstant(1, dl, MVT::i32));
1591 PassF64ArgInRegs(dl, DAG, Chain, Op0, RegsToPass,
1592 VA, ArgLocs[++i], StackPtr, MemOpChains, Flags);
1594 VA = ArgLocs[++i]; // skip ahead to next loc
1595 if (VA.isRegLoc()) {
1596 PassF64ArgInRegs(dl, DAG, Chain, Op1, RegsToPass,
1597 VA, ArgLocs[++i], StackPtr, MemOpChains, Flags);
1599 assert(VA.isMemLoc());
1601 MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, Op1,
1602 dl, DAG, VA, Flags));
1605 PassF64ArgInRegs(dl, DAG, Chain, Arg, RegsToPass, VA, ArgLocs[++i],
1606 StackPtr, MemOpChains, Flags);
1608 } else if (VA.isRegLoc()) {
1609 if (realArgIdx == 0 && Flags.isReturned() && Outs[0].VT == MVT::i32) {
1610 assert(VA.getLocVT() == MVT::i32 &&
1611 "unexpected calling convention register assignment");
1612 assert(!Ins.empty() && Ins[0].VT == MVT::i32 &&
1613 "unexpected use of 'returned'");
1614 isThisReturn = true;
1616 RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
1617 } else if (isByVal) {
1618 assert(VA.isMemLoc());
1619 unsigned offset = 0;
1621 // True if this byval aggregate will be split between registers
1623 unsigned ByValArgsCount = CCInfo.getInRegsParamsCount();
1624 unsigned CurByValIdx = CCInfo.getInRegsParamsProcessed();
1626 if (CurByValIdx < ByValArgsCount) {
1628 unsigned RegBegin, RegEnd;
1629 CCInfo.getInRegsParamInfo(CurByValIdx, RegBegin, RegEnd);
1632 DAG.getTargetLoweringInfo().getPointerTy(DAG.getDataLayout());
1634 for (i = 0, j = RegBegin; j < RegEnd; i++, j++) {
1635 SDValue Const = DAG.getConstant(4*i, dl, MVT::i32);
1636 SDValue AddArg = DAG.getNode(ISD::ADD, dl, PtrVT, Arg, Const);
1637 SDValue Load = DAG.getLoad(PtrVT, dl, Chain, AddArg,
1638 MachinePointerInfo(),
1639 false, false, false,
1640 DAG.InferPtrAlignment(AddArg));
1641 MemOpChains.push_back(Load.getValue(1));
1642 RegsToPass.push_back(std::make_pair(j, Load));
1645 // If parameter size outsides register area, "offset" value
1646 // helps us to calculate stack slot for remained part properly.
1647 offset = RegEnd - RegBegin;
1649 CCInfo.nextInRegsParam();
1652 if (Flags.getByValSize() > 4*offset) {
1653 auto PtrVT = getPointerTy(DAG.getDataLayout());
1654 unsigned LocMemOffset = VA.getLocMemOffset();
1655 SDValue StkPtrOff = DAG.getIntPtrConstant(LocMemOffset, dl);
1656 SDValue Dst = DAG.getNode(ISD::ADD, dl, PtrVT, StackPtr, StkPtrOff);
1657 SDValue SrcOffset = DAG.getIntPtrConstant(4*offset, dl);
1658 SDValue Src = DAG.getNode(ISD::ADD, dl, PtrVT, Arg, SrcOffset);
1659 SDValue SizeNode = DAG.getConstant(Flags.getByValSize() - 4*offset, dl,
1661 SDValue AlignNode = DAG.getConstant(Flags.getByValAlign(), dl,
1664 SDVTList VTs = DAG.getVTList(MVT::Other, MVT::Glue);
1665 SDValue Ops[] = { Chain, Dst, Src, SizeNode, AlignNode};
1666 MemOpChains.push_back(DAG.getNode(ARMISD::COPY_STRUCT_BYVAL, dl, VTs,
1669 } else if (!isSibCall) {
1670 assert(VA.isMemLoc());
1672 MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, Arg,
1673 dl, DAG, VA, Flags));
1677 if (!MemOpChains.empty())
1678 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOpChains);
1680 // Build a sequence of copy-to-reg nodes chained together with token chain
1681 // and flag operands which copy the outgoing args into the appropriate regs.
1683 // Tail call byval lowering might overwrite argument registers so in case of
1684 // tail call optimization the copies to registers are lowered later.
1686 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
1687 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
1688 RegsToPass[i].second, InFlag);
1689 InFlag = Chain.getValue(1);
1692 // For tail calls lower the arguments to the 'real' stack slot.
1694 // Force all the incoming stack arguments to be loaded from the stack
1695 // before any new outgoing arguments are stored to the stack, because the
1696 // outgoing stack slots may alias the incoming argument stack slots, and
1697 // the alias isn't otherwise explicit. This is slightly more conservative
1698 // than necessary, because it means that each store effectively depends
1699 // on every argument instead of just those arguments it would clobber.
1701 // Do not flag preceding copytoreg stuff together with the following stuff.
1703 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
1704 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
1705 RegsToPass[i].second, InFlag);
1706 InFlag = Chain.getValue(1);
1711 // If the callee is a GlobalAddress/ExternalSymbol node (quite common, every
1712 // direct call is) turn it into a TargetGlobalAddress/TargetExternalSymbol
1713 // node so that legalize doesn't hack it.
1714 bool isDirect = false;
1715 bool isARMFunc = false;
1716 bool isLocalARMFunc = false;
1717 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
1718 auto PtrVt = getPointerTy(DAG.getDataLayout());
1720 if (Subtarget->genLongCalls()) {
1721 assert((Subtarget->isTargetWindows() ||
1722 getTargetMachine().getRelocationModel() == Reloc::Static) &&
1723 "long-calls with non-static relocation model!");
1724 // Handle a global address or an external symbol. If it's not one of
1725 // those, the target's already in a register, so we don't need to do
1727 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
1728 const GlobalValue *GV = G->getGlobal();
1729 // Create a constant pool entry for the callee address
1730 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
1731 ARMConstantPoolValue *CPV =
1732 ARMConstantPoolConstant::Create(GV, ARMPCLabelIndex, ARMCP::CPValue, 0);
1734 // Get the address of the callee into a register
1735 SDValue CPAddr = DAG.getTargetConstantPool(CPV, PtrVt, 4);
1736 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1737 Callee = DAG.getLoad(PtrVt, dl, DAG.getEntryNode(), CPAddr,
1738 MachinePointerInfo::getConstantPool(), false, false,
1740 } else if (ExternalSymbolSDNode *S=dyn_cast<ExternalSymbolSDNode>(Callee)) {
1741 const char *Sym = S->getSymbol();
1743 // Create a constant pool entry for the callee address
1744 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
1745 ARMConstantPoolValue *CPV =
1746 ARMConstantPoolSymbol::Create(*DAG.getContext(), Sym,
1747 ARMPCLabelIndex, 0);
1748 // Get the address of the callee into a register
1749 SDValue CPAddr = DAG.getTargetConstantPool(CPV, PtrVt, 4);
1750 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1751 Callee = DAG.getLoad(PtrVt, dl, DAG.getEntryNode(), CPAddr,
1752 MachinePointerInfo::getConstantPool(), false, false,
1755 } else if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
1756 const GlobalValue *GV = G->getGlobal();
1758 bool isDef = GV->isStrongDefinitionForLinker();
1759 bool isStub = (!isDef && Subtarget->isTargetMachO()) &&
1760 getTargetMachine().getRelocationModel() != Reloc::Static;
1761 isARMFunc = !Subtarget->isThumb() || (isStub && !Subtarget->isMClass());
1762 // ARM call to a local ARM function is predicable.
1763 isLocalARMFunc = !Subtarget->isThumb() && (isDef || !ARMInterworking);
1764 // tBX takes a register source operand.
1765 if (isStub && Subtarget->isThumb1Only() && !Subtarget->hasV5TOps()) {
1766 assert(Subtarget->isTargetMachO() && "WrapperPIC use on non-MachO?");
1767 Callee = DAG.getNode(
1768 ARMISD::WrapperPIC, dl, PtrVt,
1769 DAG.getTargetGlobalAddress(GV, dl, PtrVt, 0, ARMII::MO_NONLAZY));
1770 Callee = DAG.getLoad(PtrVt, dl, DAG.getEntryNode(), Callee,
1771 MachinePointerInfo::getGOT(), false, false, true, 0);
1772 } else if (Subtarget->isTargetCOFF()) {
1773 assert(Subtarget->isTargetWindows() &&
1774 "Windows is the only supported COFF target");
1775 unsigned TargetFlags = GV->hasDLLImportStorageClass()
1776 ? ARMII::MO_DLLIMPORT
1777 : ARMII::MO_NO_FLAG;
1779 DAG.getTargetGlobalAddress(GV, dl, PtrVt, /*Offset=*/0, TargetFlags);
1780 if (GV->hasDLLImportStorageClass())
1782 DAG.getLoad(PtrVt, dl, DAG.getEntryNode(),
1783 DAG.getNode(ARMISD::Wrapper, dl, PtrVt, Callee),
1784 MachinePointerInfo::getGOT(), false, false, false, 0);
1786 // On ELF targets for PIC code, direct calls should go through the PLT
1787 unsigned OpFlags = 0;
1788 if (Subtarget->isTargetELF() &&
1789 getTargetMachine().getRelocationModel() == Reloc::PIC_)
1790 OpFlags = ARMII::MO_PLT;
1791 Callee = DAG.getTargetGlobalAddress(GV, dl, PtrVt, 0, OpFlags);
1793 } else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) {
1795 bool isStub = Subtarget->isTargetMachO() &&
1796 getTargetMachine().getRelocationModel() != Reloc::Static;
1797 isARMFunc = !Subtarget->isThumb() || (isStub && !Subtarget->isMClass());
1798 // tBX takes a register source operand.
1799 const char *Sym = S->getSymbol();
1800 if (isARMFunc && Subtarget->isThumb1Only() && !Subtarget->hasV5TOps()) {
1801 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
1802 ARMConstantPoolValue *CPV =
1803 ARMConstantPoolSymbol::Create(*DAG.getContext(), Sym,
1804 ARMPCLabelIndex, 4);
1805 SDValue CPAddr = DAG.getTargetConstantPool(CPV, PtrVt, 4);
1806 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1807 Callee = DAG.getLoad(PtrVt, dl, DAG.getEntryNode(), CPAddr,
1808 MachinePointerInfo::getConstantPool(), false, false,
1810 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, dl, MVT::i32);
1811 Callee = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVt, Callee, PICLabel);
1813 unsigned OpFlags = 0;
1814 // On ELF targets for PIC code, direct calls should go through the PLT
1815 if (Subtarget->isTargetELF() &&
1816 getTargetMachine().getRelocationModel() == Reloc::PIC_)
1817 OpFlags = ARMII::MO_PLT;
1818 Callee = DAG.getTargetExternalSymbol(Sym, PtrVt, OpFlags);
1822 // FIXME: handle tail calls differently.
1824 bool HasMinSizeAttr = MF.getFunction()->hasFnAttribute(Attribute::MinSize);
1825 if (Subtarget->isThumb()) {
1826 if ((!isDirect || isARMFunc) && !Subtarget->hasV5TOps())
1827 CallOpc = ARMISD::CALL_NOLINK;
1829 CallOpc = isARMFunc ? ARMISD::CALL : ARMISD::tCALL;
1831 if (!isDirect && !Subtarget->hasV5TOps())
1832 CallOpc = ARMISD::CALL_NOLINK;
1833 else if (doesNotRet && isDirect && Subtarget->hasRAS() &&
1834 // Emit regular call when code size is the priority
1836 // "mov lr, pc; b _foo" to avoid confusing the RSP
1837 CallOpc = ARMISD::CALL_NOLINK;
1839 CallOpc = isLocalARMFunc ? ARMISD::CALL_PRED : ARMISD::CALL;
1842 std::vector<SDValue> Ops;
1843 Ops.push_back(Chain);
1844 Ops.push_back(Callee);
1846 // Add argument registers to the end of the list so that they are known live
1848 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
1849 Ops.push_back(DAG.getRegister(RegsToPass[i].first,
1850 RegsToPass[i].second.getValueType()));
1852 // Add a register mask operand representing the call-preserved registers.
1854 const uint32_t *Mask;
1855 const ARMBaseRegisterInfo *ARI = Subtarget->getRegisterInfo();
1857 // For 'this' returns, use the R0-preserving mask if applicable
1858 Mask = ARI->getThisReturnPreservedMask(MF, CallConv);
1860 // Set isThisReturn to false if the calling convention is not one that
1861 // allows 'returned' to be modeled in this way, so LowerCallResult does
1862 // not try to pass 'this' straight through
1863 isThisReturn = false;
1864 Mask = ARI->getCallPreservedMask(MF, CallConv);
1867 Mask = ARI->getCallPreservedMask(MF, CallConv);
1869 assert(Mask && "Missing call preserved mask for calling convention");
1870 Ops.push_back(DAG.getRegisterMask(Mask));
1873 if (InFlag.getNode())
1874 Ops.push_back(InFlag);
1876 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
1878 MF.getFrameInfo()->setHasTailCall();
1879 return DAG.getNode(ARMISD::TC_RETURN, dl, NodeTys, Ops);
1882 // Returns a chain and a flag for retval copy to use.
1883 Chain = DAG.getNode(CallOpc, dl, NodeTys, Ops);
1884 InFlag = Chain.getValue(1);
1886 Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(NumBytes, dl, true),
1887 DAG.getIntPtrConstant(0, dl, true), InFlag, dl);
1889 InFlag = Chain.getValue(1);
1891 // Handle result values, copying them out of physregs into vregs that we
1893 return LowerCallResult(Chain, InFlag, CallConv, isVarArg, Ins, dl, DAG,
1894 InVals, isThisReturn,
1895 isThisReturn ? OutVals[0] : SDValue());
1898 /// HandleByVal - Every parameter *after* a byval parameter is passed
1899 /// on the stack. Remember the next parameter register to allocate,
1900 /// and then confiscate the rest of the parameter registers to insure
1902 void ARMTargetLowering::HandleByVal(CCState *State, unsigned &Size,
1903 unsigned Align) const {
1904 assert((State->getCallOrPrologue() == Prologue ||
1905 State->getCallOrPrologue() == Call) &&
1906 "unhandled ParmContext");
1908 // Byval (as with any stack) slots are always at least 4 byte aligned.
1909 Align = std::max(Align, 4U);
1911 unsigned Reg = State->AllocateReg(GPRArgRegs);
1915 unsigned AlignInRegs = Align / 4;
1916 unsigned Waste = (ARM::R4 - Reg) % AlignInRegs;
1917 for (unsigned i = 0; i < Waste; ++i)
1918 Reg = State->AllocateReg(GPRArgRegs);
1923 unsigned Excess = 4 * (ARM::R4 - Reg);
1925 // Special case when NSAA != SP and parameter size greater than size of
1926 // all remained GPR regs. In that case we can't split parameter, we must
1927 // send it to stack. We also must set NCRN to R4, so waste all
1928 // remained registers.
1929 const unsigned NSAAOffset = State->getNextStackOffset();
1930 if (NSAAOffset != 0 && Size > Excess) {
1931 while (State->AllocateReg(GPRArgRegs))
1936 // First register for byval parameter is the first register that wasn't
1937 // allocated before this method call, so it would be "reg".
1938 // If parameter is small enough to be saved in range [reg, r4), then
1939 // the end (first after last) register would be reg + param-size-in-regs,
1940 // else parameter would be splitted between registers and stack,
1941 // end register would be r4 in this case.
1942 unsigned ByValRegBegin = Reg;
1943 unsigned ByValRegEnd = std::min<unsigned>(Reg + Size / 4, ARM::R4);
1944 State->addInRegsParamInfo(ByValRegBegin, ByValRegEnd);
1945 // Note, first register is allocated in the beginning of function already,
1946 // allocate remained amount of registers we need.
1947 for (unsigned i = Reg + 1; i != ByValRegEnd; ++i)
1948 State->AllocateReg(GPRArgRegs);
1949 // A byval parameter that is split between registers and memory needs its
1950 // size truncated here.
1951 // In the case where the entire structure fits in registers, we set the
1952 // size in memory to zero.
1953 Size = std::max<int>(Size - Excess, 0);
1956 /// MatchingStackOffset - Return true if the given stack call argument is
1957 /// already available in the same position (relatively) of the caller's
1958 /// incoming argument stack.
1960 bool MatchingStackOffset(SDValue Arg, unsigned Offset, ISD::ArgFlagsTy Flags,
1961 MachineFrameInfo *MFI, const MachineRegisterInfo *MRI,
1962 const TargetInstrInfo *TII) {
1963 unsigned Bytes = Arg.getValueType().getSizeInBits() / 8;
1965 if (Arg.getOpcode() == ISD::CopyFromReg) {
1966 unsigned VR = cast<RegisterSDNode>(Arg.getOperand(1))->getReg();
1967 if (!TargetRegisterInfo::isVirtualRegister(VR))
1969 MachineInstr *Def = MRI->getVRegDef(VR);
1972 if (!Flags.isByVal()) {
1973 if (!TII->isLoadFromStackSlot(Def, FI))
1978 } else if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Arg)) {
1979 if (Flags.isByVal())
1980 // ByVal argument is passed in as a pointer but it's now being
1981 // dereferenced. e.g.
1982 // define @foo(%struct.X* %A) {
1983 // tail call @bar(%struct.X* byval %A)
1986 SDValue Ptr = Ld->getBasePtr();
1987 FrameIndexSDNode *FINode = dyn_cast<FrameIndexSDNode>(Ptr);
1990 FI = FINode->getIndex();
1994 assert(FI != INT_MAX);
1995 if (!MFI->isFixedObjectIndex(FI))
1997 return Offset == MFI->getObjectOffset(FI) && Bytes == MFI->getObjectSize(FI);
2000 /// IsEligibleForTailCallOptimization - Check whether the call is eligible
2001 /// for tail call optimization. Targets which want to do tail call
2002 /// optimization should implement this function.
2004 ARMTargetLowering::IsEligibleForTailCallOptimization(SDValue Callee,
2005 CallingConv::ID CalleeCC,
2007 bool isCalleeStructRet,
2008 bool isCallerStructRet,
2009 const SmallVectorImpl<ISD::OutputArg> &Outs,
2010 const SmallVectorImpl<SDValue> &OutVals,
2011 const SmallVectorImpl<ISD::InputArg> &Ins,
2012 SelectionDAG& DAG) const {
2013 const Function *CallerF = DAG.getMachineFunction().getFunction();
2014 CallingConv::ID CallerCC = CallerF->getCallingConv();
2015 bool CCMatch = CallerCC == CalleeCC;
2017 // Look for obvious safe cases to perform tail call optimization that do not
2018 // require ABI changes. This is what gcc calls sibcall.
2020 // Do not sibcall optimize vararg calls unless the call site is not passing
2022 if (isVarArg && !Outs.empty())
2025 // Exception-handling functions need a special set of instructions to indicate
2026 // a return to the hardware. Tail-calling another function would probably
2028 if (CallerF->hasFnAttribute("interrupt"))
2031 // Also avoid sibcall optimization if either caller or callee uses struct
2032 // return semantics.
2033 if (isCalleeStructRet || isCallerStructRet)
2036 // FIXME: Completely disable sibcall for Thumb1 since ThumbRegisterInfo::
2037 // emitEpilogue is not ready for them. Thumb tail calls also use t2B, as
2038 // the Thumb1 16-bit unconditional branch doesn't have sufficient relocation
2039 // support in the assembler and linker to be used. This would need to be
2040 // fixed to fully support tail calls in Thumb1.
2042 // Doing this is tricky, since the LDM/POP instruction on Thumb doesn't take
2043 // LR. This means if we need to reload LR, it takes an extra instructions,
2044 // which outweighs the value of the tail call; but here we don't know yet
2045 // whether LR is going to be used. Probably the right approach is to
2046 // generate the tail call here and turn it back into CALL/RET in
2047 // emitEpilogue if LR is used.
2049 // Thumb1 PIC calls to external symbols use BX, so they can be tail calls,
2050 // but we need to make sure there are enough registers; the only valid
2051 // registers are the 4 used for parameters. We don't currently do this
2053 if (Subtarget->isThumb1Only())
2056 // Externally-defined functions with weak linkage should not be
2057 // tail-called on ARM when the OS does not support dynamic
2058 // pre-emption of symbols, as the AAELF spec requires normal calls
2059 // to undefined weak functions to be replaced with a NOP or jump to the
2060 // next instruction. The behaviour of branch instructions in this
2061 // situation (as used for tail calls) is implementation-defined, so we
2062 // cannot rely on the linker replacing the tail call with a return.
2063 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
2064 const GlobalValue *GV = G->getGlobal();
2065 const Triple &TT = getTargetMachine().getTargetTriple();
2066 if (GV->hasExternalWeakLinkage() &&
2067 (!TT.isOSWindows() || TT.isOSBinFormatELF() || TT.isOSBinFormatMachO()))
2071 // If the calling conventions do not match, then we'd better make sure the
2072 // results are returned in the same way as what the caller expects.
2074 SmallVector<CCValAssign, 16> RVLocs1;
2075 ARMCCState CCInfo1(CalleeCC, false, DAG.getMachineFunction(), RVLocs1,
2076 *DAG.getContext(), Call);
2077 CCInfo1.AnalyzeCallResult(Ins, CCAssignFnForNode(CalleeCC, true, isVarArg));
2079 SmallVector<CCValAssign, 16> RVLocs2;
2080 ARMCCState CCInfo2(CallerCC, false, DAG.getMachineFunction(), RVLocs2,
2081 *DAG.getContext(), Call);
2082 CCInfo2.AnalyzeCallResult(Ins, CCAssignFnForNode(CallerCC, true, isVarArg));
2084 if (RVLocs1.size() != RVLocs2.size())
2086 for (unsigned i = 0, e = RVLocs1.size(); i != e; ++i) {
2087 if (RVLocs1[i].isRegLoc() != RVLocs2[i].isRegLoc())
2089 if (RVLocs1[i].getLocInfo() != RVLocs2[i].getLocInfo())
2091 if (RVLocs1[i].isRegLoc()) {
2092 if (RVLocs1[i].getLocReg() != RVLocs2[i].getLocReg())
2095 if (RVLocs1[i].getLocMemOffset() != RVLocs2[i].getLocMemOffset())
2101 // If Caller's vararg or byval argument has been split between registers and
2102 // stack, do not perform tail call, since part of the argument is in caller's
2104 const ARMFunctionInfo *AFI_Caller = DAG.getMachineFunction().
2105 getInfo<ARMFunctionInfo>();
2106 if (AFI_Caller->getArgRegsSaveSize())
2109 // If the callee takes no arguments then go on to check the results of the
2111 if (!Outs.empty()) {
2112 // Check if stack adjustment is needed. For now, do not do this if any
2113 // argument is passed on the stack.
2114 SmallVector<CCValAssign, 16> ArgLocs;
2115 ARMCCState CCInfo(CalleeCC, isVarArg, DAG.getMachineFunction(), ArgLocs,
2116 *DAG.getContext(), Call);
2117 CCInfo.AnalyzeCallOperands(Outs,
2118 CCAssignFnForNode(CalleeCC, false, isVarArg));
2119 if (CCInfo.getNextStackOffset()) {
2120 MachineFunction &MF = DAG.getMachineFunction();
2122 // Check if the arguments are already laid out in the right way as
2123 // the caller's fixed stack objects.
2124 MachineFrameInfo *MFI = MF.getFrameInfo();
2125 const MachineRegisterInfo *MRI = &MF.getRegInfo();
2126 const TargetInstrInfo *TII = Subtarget->getInstrInfo();
2127 for (unsigned i = 0, realArgIdx = 0, e = ArgLocs.size();
2129 ++i, ++realArgIdx) {
2130 CCValAssign &VA = ArgLocs[i];
2131 EVT RegVT = VA.getLocVT();
2132 SDValue Arg = OutVals[realArgIdx];
2133 ISD::ArgFlagsTy Flags = Outs[realArgIdx].Flags;
2134 if (VA.getLocInfo() == CCValAssign::Indirect)
2136 if (VA.needsCustom()) {
2137 // f64 and vector types are split into multiple registers or
2138 // register/stack-slot combinations. The types will not match
2139 // the registers; give up on memory f64 refs until we figure
2140 // out what to do about this.
2143 if (!ArgLocs[++i].isRegLoc())
2145 if (RegVT == MVT::v2f64) {
2146 if (!ArgLocs[++i].isRegLoc())
2148 if (!ArgLocs[++i].isRegLoc())
2151 } else if (!VA.isRegLoc()) {
2152 if (!MatchingStackOffset(Arg, VA.getLocMemOffset(), Flags,
2164 ARMTargetLowering::CanLowerReturn(CallingConv::ID CallConv,
2165 MachineFunction &MF, bool isVarArg,
2166 const SmallVectorImpl<ISD::OutputArg> &Outs,
2167 LLVMContext &Context) const {
2168 SmallVector<CCValAssign, 16> RVLocs;
2169 CCState CCInfo(CallConv, isVarArg, MF, RVLocs, Context);
2170 return CCInfo.CheckReturn(Outs, CCAssignFnForNode(CallConv, /*Return=*/true,
2174 static SDValue LowerInterruptReturn(SmallVectorImpl<SDValue> &RetOps,
2175 SDLoc DL, SelectionDAG &DAG) {
2176 const MachineFunction &MF = DAG.getMachineFunction();
2177 const Function *F = MF.getFunction();
2179 StringRef IntKind = F->getFnAttribute("interrupt").getValueAsString();
2181 // See ARM ARM v7 B1.8.3. On exception entry LR is set to a possibly offset
2182 // version of the "preferred return address". These offsets affect the return
2183 // instruction if this is a return from PL1 without hypervisor extensions.
2184 // IRQ/FIQ: +4 "subs pc, lr, #4"
2185 // SWI: 0 "subs pc, lr, #0"
2186 // ABORT: +4 "subs pc, lr, #4"
2187 // UNDEF: +4/+2 "subs pc, lr, #0"
2188 // UNDEF varies depending on where the exception came from ARM or Thumb
2189 // mode. Alongside GCC, we throw our hands up in disgust and pretend it's 0.
2192 if (IntKind == "" || IntKind == "IRQ" || IntKind == "FIQ" ||
2195 else if (IntKind == "SWI" || IntKind == "UNDEF")
2198 report_fatal_error("Unsupported interrupt attribute. If present, value "
2199 "must be one of: IRQ, FIQ, SWI, ABORT or UNDEF");
2201 RetOps.insert(RetOps.begin() + 1,
2202 DAG.getConstant(LROffset, DL, MVT::i32, false));
2204 return DAG.getNode(ARMISD::INTRET_FLAG, DL, MVT::Other, RetOps);
2208 ARMTargetLowering::LowerReturn(SDValue Chain,
2209 CallingConv::ID CallConv, bool isVarArg,
2210 const SmallVectorImpl<ISD::OutputArg> &Outs,
2211 const SmallVectorImpl<SDValue> &OutVals,
2212 SDLoc dl, SelectionDAG &DAG) const {
2214 // CCValAssign - represent the assignment of the return value to a location.
2215 SmallVector<CCValAssign, 16> RVLocs;
2217 // CCState - Info about the registers and stack slots.
2218 ARMCCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(), RVLocs,
2219 *DAG.getContext(), Call);
2221 // Analyze outgoing return values.
2222 CCInfo.AnalyzeReturn(Outs, CCAssignFnForNode(CallConv, /* Return */ true,
2226 SmallVector<SDValue, 4> RetOps;
2227 RetOps.push_back(Chain); // Operand #0 = Chain (updated below)
2228 bool isLittleEndian = Subtarget->isLittle();
2230 MachineFunction &MF = DAG.getMachineFunction();
2231 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2232 AFI->setReturnRegsCount(RVLocs.size());
2234 // Copy the result values into the output registers.
2235 for (unsigned i = 0, realRVLocIdx = 0;
2237 ++i, ++realRVLocIdx) {
2238 CCValAssign &VA = RVLocs[i];
2239 assert(VA.isRegLoc() && "Can only return in registers!");
2241 SDValue Arg = OutVals[realRVLocIdx];
2243 switch (VA.getLocInfo()) {
2244 default: llvm_unreachable("Unknown loc info!");
2245 case CCValAssign::Full: break;
2246 case CCValAssign::BCvt:
2247 Arg = DAG.getNode(ISD::BITCAST, dl, VA.getLocVT(), Arg);
2251 if (VA.needsCustom()) {
2252 if (VA.getLocVT() == MVT::v2f64) {
2253 // Extract the first half and return it in two registers.
2254 SDValue Half = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg,
2255 DAG.getConstant(0, dl, MVT::i32));
2256 SDValue HalfGPRs = DAG.getNode(ARMISD::VMOVRRD, dl,
2257 DAG.getVTList(MVT::i32, MVT::i32), Half);
2259 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(),
2260 HalfGPRs.getValue(isLittleEndian ? 0 : 1),
2262 Flag = Chain.getValue(1);
2263 RetOps.push_back(DAG.getRegister(VA.getLocReg(), VA.getLocVT()));
2264 VA = RVLocs[++i]; // skip ahead to next loc
2265 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(),
2266 HalfGPRs.getValue(isLittleEndian ? 1 : 0),
2268 Flag = Chain.getValue(1);
2269 RetOps.push_back(DAG.getRegister(VA.getLocReg(), VA.getLocVT()));
2270 VA = RVLocs[++i]; // skip ahead to next loc
2272 // Extract the 2nd half and fall through to handle it as an f64 value.
2273 Arg = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg,
2274 DAG.getConstant(1, dl, MVT::i32));
2276 // Legalize ret f64 -> ret 2 x i32. We always have fmrrd if f64 is
2278 SDValue fmrrd = DAG.getNode(ARMISD::VMOVRRD, dl,
2279 DAG.getVTList(MVT::i32, MVT::i32), Arg);
2280 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(),
2281 fmrrd.getValue(isLittleEndian ? 0 : 1),
2283 Flag = Chain.getValue(1);
2284 RetOps.push_back(DAG.getRegister(VA.getLocReg(), VA.getLocVT()));
2285 VA = RVLocs[++i]; // skip ahead to next loc
2286 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(),
2287 fmrrd.getValue(isLittleEndian ? 1 : 0),
2290 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), Arg, Flag);
2292 // Guarantee that all emitted copies are
2293 // stuck together, avoiding something bad.
2294 Flag = Chain.getValue(1);
2295 RetOps.push_back(DAG.getRegister(VA.getLocReg(), VA.getLocVT()));
2298 // Update chain and glue.
2301 RetOps.push_back(Flag);
2303 // CPUs which aren't M-class use a special sequence to return from
2304 // exceptions (roughly, any instruction setting pc and cpsr simultaneously,
2305 // though we use "subs pc, lr, #N").
2307 // M-class CPUs actually use a normal return sequence with a special
2308 // (hardware-provided) value in LR, so the normal code path works.
2309 if (DAG.getMachineFunction().getFunction()->hasFnAttribute("interrupt") &&
2310 !Subtarget->isMClass()) {
2311 if (Subtarget->isThumb1Only())
2312 report_fatal_error("interrupt attribute is not supported in Thumb1");
2313 return LowerInterruptReturn(RetOps, dl, DAG);
2316 return DAG.getNode(ARMISD::RET_FLAG, dl, MVT::Other, RetOps);
2319 bool ARMTargetLowering::isUsedByReturnOnly(SDNode *N, SDValue &Chain) const {
2320 if (N->getNumValues() != 1)
2322 if (!N->hasNUsesOfValue(1, 0))
2325 SDValue TCChain = Chain;
2326 SDNode *Copy = *N->use_begin();
2327 if (Copy->getOpcode() == ISD::CopyToReg) {
2328 // If the copy has a glue operand, we conservatively assume it isn't safe to
2329 // perform a tail call.
2330 if (Copy->getOperand(Copy->getNumOperands()-1).getValueType() == MVT::Glue)
2332 TCChain = Copy->getOperand(0);
2333 } else if (Copy->getOpcode() == ARMISD::VMOVRRD) {
2334 SDNode *VMov = Copy;
2335 // f64 returned in a pair of GPRs.
2336 SmallPtrSet<SDNode*, 2> Copies;
2337 for (SDNode::use_iterator UI = VMov->use_begin(), UE = VMov->use_end();
2339 if (UI->getOpcode() != ISD::CopyToReg)
2343 if (Copies.size() > 2)
2346 for (SDNode::use_iterator UI = VMov->use_begin(), UE = VMov->use_end();
2348 SDValue UseChain = UI->getOperand(0);
2349 if (Copies.count(UseChain.getNode()))
2353 // We are at the top of this chain.
2354 // If the copy has a glue operand, we conservatively assume it
2355 // isn't safe to perform a tail call.
2356 if (UI->getOperand(UI->getNumOperands()-1).getValueType() == MVT::Glue)
2362 } else if (Copy->getOpcode() == ISD::BITCAST) {
2363 // f32 returned in a single GPR.
2364 if (!Copy->hasOneUse())
2366 Copy = *Copy->use_begin();
2367 if (Copy->getOpcode() != ISD::CopyToReg || !Copy->hasNUsesOfValue(1, 0))
2369 // If the copy has a glue operand, we conservatively assume it isn't safe to
2370 // perform a tail call.
2371 if (Copy->getOperand(Copy->getNumOperands()-1).getValueType() == MVT::Glue)
2373 TCChain = Copy->getOperand(0);
2378 bool HasRet = false;
2379 for (SDNode::use_iterator UI = Copy->use_begin(), UE = Copy->use_end();
2381 if (UI->getOpcode() != ARMISD::RET_FLAG &&
2382 UI->getOpcode() != ARMISD::INTRET_FLAG)
2394 bool ARMTargetLowering::mayBeEmittedAsTailCall(CallInst *CI) const {
2395 if (!Subtarget->supportsTailCall())
2399 CI->getParent()->getParent()->getFnAttribute("disable-tail-calls");
2400 if (!CI->isTailCall() || Attr.getValueAsString() == "true")
2403 return !Subtarget->isThumb1Only();
2406 // Trying to write a 64 bit value so need to split into two 32 bit values first,
2407 // and pass the lower and high parts through.
2408 static SDValue LowerWRITE_REGISTER(SDValue Op, SelectionDAG &DAG) {
2410 SDValue WriteValue = Op->getOperand(2);
2412 // This function is only supposed to be called for i64 type argument.
2413 assert(WriteValue.getValueType() == MVT::i64
2414 && "LowerWRITE_REGISTER called for non-i64 type argument.");
2416 SDValue Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, MVT::i32, WriteValue,
2417 DAG.getConstant(0, DL, MVT::i32));
2418 SDValue Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, MVT::i32, WriteValue,
2419 DAG.getConstant(1, DL, MVT::i32));
2420 SDValue Ops[] = { Op->getOperand(0), Op->getOperand(1), Lo, Hi };
2421 return DAG.getNode(ISD::WRITE_REGISTER, DL, MVT::Other, Ops);
2424 // ConstantPool, JumpTable, GlobalAddress, and ExternalSymbol are lowered as
2425 // their target counterpart wrapped in the ARMISD::Wrapper node. Suppose N is
2426 // one of the above mentioned nodes. It has to be wrapped because otherwise
2427 // Select(N) returns N. So the raw TargetGlobalAddress nodes, etc. can only
2428 // be used to form addressing mode. These wrapped nodes will be selected
2430 static SDValue LowerConstantPool(SDValue Op, SelectionDAG &DAG) {
2431 EVT PtrVT = Op.getValueType();
2432 // FIXME there is no actual debug info here
2434 ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
2436 if (CP->isMachineConstantPoolEntry())
2437 Res = DAG.getTargetConstantPool(CP->getMachineCPVal(), PtrVT,
2438 CP->getAlignment());
2440 Res = DAG.getTargetConstantPool(CP->getConstVal(), PtrVT,
2441 CP->getAlignment());
2442 return DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Res);
2445 unsigned ARMTargetLowering::getJumpTableEncoding() const {
2446 return MachineJumpTableInfo::EK_Inline;
2449 SDValue ARMTargetLowering::LowerBlockAddress(SDValue Op,
2450 SelectionDAG &DAG) const {
2451 MachineFunction &MF = DAG.getMachineFunction();
2452 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2453 unsigned ARMPCLabelIndex = 0;
2455 EVT PtrVT = getPointerTy(DAG.getDataLayout());
2456 const BlockAddress *BA = cast<BlockAddressSDNode>(Op)->getBlockAddress();
2457 Reloc::Model RelocM = getTargetMachine().getRelocationModel();
2459 if (RelocM == Reloc::Static) {
2460 CPAddr = DAG.getTargetConstantPool(BA, PtrVT, 4);
2462 unsigned PCAdj = Subtarget->isThumb() ? 4 : 8;
2463 ARMPCLabelIndex = AFI->createPICLabelUId();
2464 ARMConstantPoolValue *CPV =
2465 ARMConstantPoolConstant::Create(BA, ARMPCLabelIndex,
2466 ARMCP::CPBlockAddress, PCAdj);
2467 CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2469 CPAddr = DAG.getNode(ARMISD::Wrapper, DL, PtrVT, CPAddr);
2470 SDValue Result = DAG.getLoad(PtrVT, DL, DAG.getEntryNode(), CPAddr,
2471 MachinePointerInfo::getConstantPool(),
2472 false, false, false, 0);
2473 if (RelocM == Reloc::Static)
2475 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, DL, MVT::i32);
2476 return DAG.getNode(ARMISD::PIC_ADD, DL, PtrVT, Result, PICLabel);
2479 // Lower ISD::GlobalTLSAddress using the "general dynamic" model
2481 ARMTargetLowering::LowerToTLSGeneralDynamicModel(GlobalAddressSDNode *GA,
2482 SelectionDAG &DAG) const {
2484 EVT PtrVT = getPointerTy(DAG.getDataLayout());
2485 unsigned char PCAdj = Subtarget->isThumb() ? 4 : 8;
2486 MachineFunction &MF = DAG.getMachineFunction();
2487 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2488 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
2489 ARMConstantPoolValue *CPV =
2490 ARMConstantPoolConstant::Create(GA->getGlobal(), ARMPCLabelIndex,
2491 ARMCP::CPValue, PCAdj, ARMCP::TLSGD, true);
2492 SDValue Argument = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2493 Argument = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Argument);
2494 Argument = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), Argument,
2495 MachinePointerInfo::getConstantPool(),
2496 false, false, false, 0);
2497 SDValue Chain = Argument.getValue(1);
2499 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, dl, MVT::i32);
2500 Argument = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Argument, PICLabel);
2502 // call __tls_get_addr.
2505 Entry.Node = Argument;
2506 Entry.Ty = (Type *) Type::getInt32Ty(*DAG.getContext());
2507 Args.push_back(Entry);
2509 // FIXME: is there useful debug info available here?
2510 TargetLowering::CallLoweringInfo CLI(DAG);
2511 CLI.setDebugLoc(dl).setChain(Chain)
2512 .setCallee(CallingConv::C, Type::getInt32Ty(*DAG.getContext()),
2513 DAG.getExternalSymbol("__tls_get_addr", PtrVT), std::move(Args),
2516 std::pair<SDValue, SDValue> CallResult = LowerCallTo(CLI);
2517 return CallResult.first;
2520 // Lower ISD::GlobalTLSAddress using the "initial exec" or
2521 // "local exec" model.
2523 ARMTargetLowering::LowerToTLSExecModels(GlobalAddressSDNode *GA,
2525 TLSModel::Model model) const {
2526 const GlobalValue *GV = GA->getGlobal();
2529 SDValue Chain = DAG.getEntryNode();
2530 EVT PtrVT = getPointerTy(DAG.getDataLayout());
2531 // Get the Thread Pointer
2532 SDValue ThreadPointer = DAG.getNode(ARMISD::THREAD_POINTER, dl, PtrVT);
2534 if (model == TLSModel::InitialExec) {
2535 MachineFunction &MF = DAG.getMachineFunction();
2536 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2537 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
2538 // Initial exec model.
2539 unsigned char PCAdj = Subtarget->isThumb() ? 4 : 8;
2540 ARMConstantPoolValue *CPV =
2541 ARMConstantPoolConstant::Create(GA->getGlobal(), ARMPCLabelIndex,
2542 ARMCP::CPValue, PCAdj, ARMCP::GOTTPOFF,
2544 Offset = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2545 Offset = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Offset);
2546 Offset = DAG.getLoad(PtrVT, dl, Chain, Offset,
2547 MachinePointerInfo::getConstantPool(),
2548 false, false, false, 0);
2549 Chain = Offset.getValue(1);
2551 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, dl, MVT::i32);
2552 Offset = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Offset, PICLabel);
2554 Offset = DAG.getLoad(PtrVT, dl, Chain, Offset,
2555 MachinePointerInfo::getConstantPool(),
2556 false, false, false, 0);
2559 assert(model == TLSModel::LocalExec);
2560 ARMConstantPoolValue *CPV =
2561 ARMConstantPoolConstant::Create(GV, ARMCP::TPOFF);
2562 Offset = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2563 Offset = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Offset);
2564 Offset = DAG.getLoad(PtrVT, dl, Chain, Offset,
2565 MachinePointerInfo::getConstantPool(),
2566 false, false, false, 0);
2569 // The address of the thread local variable is the add of the thread
2570 // pointer with the offset of the variable.
2571 return DAG.getNode(ISD::ADD, dl, PtrVT, ThreadPointer, Offset);
2575 ARMTargetLowering::LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const {
2576 // TODO: implement the "local dynamic" model
2577 assert(Subtarget->isTargetELF() &&
2578 "TLS not implemented for non-ELF targets");
2579 GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op);
2581 TLSModel::Model model = getTargetMachine().getTLSModel(GA->getGlobal());
2584 case TLSModel::GeneralDynamic:
2585 case TLSModel::LocalDynamic:
2586 return LowerToTLSGeneralDynamicModel(GA, DAG);
2587 case TLSModel::InitialExec:
2588 case TLSModel::LocalExec:
2589 return LowerToTLSExecModels(GA, DAG, model);
2591 llvm_unreachable("bogus TLS model");
2594 SDValue ARMTargetLowering::LowerGlobalAddressELF(SDValue Op,
2595 SelectionDAG &DAG) const {
2596 EVT PtrVT = getPointerTy(DAG.getDataLayout());
2598 const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
2599 if (getTargetMachine().getRelocationModel() == Reloc::PIC_) {
2600 bool UseGOTOFF = GV->hasLocalLinkage() || GV->hasHiddenVisibility();
2601 ARMConstantPoolValue *CPV =
2602 ARMConstantPoolConstant::Create(GV,
2603 UseGOTOFF ? ARMCP::GOTOFF : ARMCP::GOT);
2604 SDValue CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2605 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
2606 SDValue Result = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(),
2608 MachinePointerInfo::getConstantPool(),
2609 false, false, false, 0);
2610 SDValue Chain = Result.getValue(1);
2611 SDValue GOT = DAG.getGLOBAL_OFFSET_TABLE(PtrVT);
2612 Result = DAG.getNode(ISD::ADD, dl, PtrVT, Result, GOT);
2614 Result = DAG.getLoad(PtrVT, dl, Chain, Result,
2615 MachinePointerInfo::getGOT(),
2616 false, false, false, 0);
2620 // If we have T2 ops, we can materialize the address directly via movt/movw
2621 // pair. This is always cheaper.
2622 if (Subtarget->useMovt(DAG.getMachineFunction())) {
2624 // FIXME: Once remat is capable of dealing with instructions with register
2625 // operands, expand this into two nodes.
2626 return DAG.getNode(ARMISD::Wrapper, dl, PtrVT,
2627 DAG.getTargetGlobalAddress(GV, dl, PtrVT));
2629 SDValue CPAddr = DAG.getTargetConstantPool(GV, PtrVT, 4);
2630 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
2631 return DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), CPAddr,
2632 MachinePointerInfo::getConstantPool(),
2633 false, false, false, 0);
2637 SDValue ARMTargetLowering::LowerGlobalAddressDarwin(SDValue Op,
2638 SelectionDAG &DAG) const {
2639 EVT PtrVT = getPointerTy(DAG.getDataLayout());
2641 const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
2642 Reloc::Model RelocM = getTargetMachine().getRelocationModel();
2644 if (Subtarget->useMovt(DAG.getMachineFunction()))
2647 // FIXME: Once remat is capable of dealing with instructions with register
2648 // operands, expand this into multiple nodes
2650 RelocM == Reloc::PIC_ ? ARMISD::WrapperPIC : ARMISD::Wrapper;
2652 SDValue G = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0, ARMII::MO_NONLAZY);
2653 SDValue Result = DAG.getNode(Wrapper, dl, PtrVT, G);
2655 if (Subtarget->GVIsIndirectSymbol(GV, RelocM))
2656 Result = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), Result,
2657 MachinePointerInfo::getGOT(), false, false, false, 0);
2661 SDValue ARMTargetLowering::LowerGlobalAddressWindows(SDValue Op,
2662 SelectionDAG &DAG) const {
2663 assert(Subtarget->isTargetWindows() && "non-Windows COFF is not supported");
2664 assert(Subtarget->useMovt(DAG.getMachineFunction()) &&
2665 "Windows on ARM expects to use movw/movt");
2667 const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
2668 const ARMII::TOF TargetFlags =
2669 (GV->hasDLLImportStorageClass() ? ARMII::MO_DLLIMPORT : ARMII::MO_NO_FLAG);
2670 EVT PtrVT = getPointerTy(DAG.getDataLayout());
2676 // FIXME: Once remat is capable of dealing with instructions with register
2677 // operands, expand this into two nodes.
2678 Result = DAG.getNode(ARMISD::Wrapper, DL, PtrVT,
2679 DAG.getTargetGlobalAddress(GV, DL, PtrVT, /*Offset=*/0,
2681 if (GV->hasDLLImportStorageClass())
2682 Result = DAG.getLoad(PtrVT, DL, DAG.getEntryNode(), Result,
2683 MachinePointerInfo::getGOT(), false, false, false, 0);
2687 SDValue ARMTargetLowering::LowerGLOBAL_OFFSET_TABLE(SDValue Op,
2688 SelectionDAG &DAG) const {
2689 assert(Subtarget->isTargetELF() &&
2690 "GLOBAL OFFSET TABLE not implemented for non-ELF targets");
2691 MachineFunction &MF = DAG.getMachineFunction();
2692 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2693 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
2694 EVT PtrVT = getPointerTy(DAG.getDataLayout());
2696 unsigned PCAdj = Subtarget->isThumb() ? 4 : 8;
2697 ARMConstantPoolValue *CPV =
2698 ARMConstantPoolSymbol::Create(*DAG.getContext(), "_GLOBAL_OFFSET_TABLE_",
2699 ARMPCLabelIndex, PCAdj);
2700 SDValue CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2701 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
2702 SDValue Result = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), CPAddr,
2703 MachinePointerInfo::getConstantPool(),
2704 false, false, false, 0);
2705 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, dl, MVT::i32);
2706 return DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Result, PICLabel);
2710 ARMTargetLowering::LowerEH_SJLJ_SETJMP(SDValue Op, SelectionDAG &DAG) const {
2712 SDValue Val = DAG.getConstant(0, dl, MVT::i32);
2713 return DAG.getNode(ARMISD::EH_SJLJ_SETJMP, dl,
2714 DAG.getVTList(MVT::i32, MVT::Other), Op.getOperand(0),
2715 Op.getOperand(1), Val);
2719 ARMTargetLowering::LowerEH_SJLJ_LONGJMP(SDValue Op, SelectionDAG &DAG) const {
2721 return DAG.getNode(ARMISD::EH_SJLJ_LONGJMP, dl, MVT::Other, Op.getOperand(0),
2722 Op.getOperand(1), DAG.getConstant(0, dl, MVT::i32));
2726 ARMTargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG,
2727 const ARMSubtarget *Subtarget) const {
2728 unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
2731 default: return SDValue(); // Don't custom lower most intrinsics.
2732 case Intrinsic::arm_rbit: {
2733 assert(Op.getOperand(1).getValueType() == MVT::i32 &&
2734 "RBIT intrinsic must have i32 type!");
2735 return DAG.getNode(ARMISD::RBIT, dl, MVT::i32, Op.getOperand(1));
2737 case Intrinsic::arm_thread_pointer: {
2738 EVT PtrVT = getPointerTy(DAG.getDataLayout());
2739 return DAG.getNode(ARMISD::THREAD_POINTER, dl, PtrVT);
2741 case Intrinsic::eh_sjlj_lsda: {
2742 MachineFunction &MF = DAG.getMachineFunction();
2743 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2744 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
2745 EVT PtrVT = getPointerTy(DAG.getDataLayout());
2746 Reloc::Model RelocM = getTargetMachine().getRelocationModel();
2748 unsigned PCAdj = (RelocM != Reloc::PIC_)
2749 ? 0 : (Subtarget->isThumb() ? 4 : 8);
2750 ARMConstantPoolValue *CPV =
2751 ARMConstantPoolConstant::Create(MF.getFunction(), ARMPCLabelIndex,
2752 ARMCP::CPLSDA, PCAdj);
2753 CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2754 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
2756 DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), CPAddr,
2757 MachinePointerInfo::getConstantPool(),
2758 false, false, false, 0);
2760 if (RelocM == Reloc::PIC_) {
2761 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, dl, MVT::i32);
2762 Result = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Result, PICLabel);
2766 case Intrinsic::arm_neon_vmulls:
2767 case Intrinsic::arm_neon_vmullu: {
2768 unsigned NewOpc = (IntNo == Intrinsic::arm_neon_vmulls)
2769 ? ARMISD::VMULLs : ARMISD::VMULLu;
2770 return DAG.getNode(NewOpc, SDLoc(Op), Op.getValueType(),
2771 Op.getOperand(1), Op.getOperand(2));
2776 static SDValue LowerATOMIC_FENCE(SDValue Op, SelectionDAG &DAG,
2777 const ARMSubtarget *Subtarget) {
2778 // FIXME: handle "fence singlethread" more efficiently.
2780 if (!Subtarget->hasDataBarrier()) {
2781 // Some ARMv6 cpus can support data barriers with an mcr instruction.
2782 // Thumb1 and pre-v6 ARM mode use a libcall instead and should never get
2784 assert(Subtarget->hasV6Ops() && !Subtarget->isThumb() &&
2785 "Unexpected ISD::ATOMIC_FENCE encountered. Should be libcall!");
2786 return DAG.getNode(ARMISD::MEMBARRIER_MCR, dl, MVT::Other, Op.getOperand(0),
2787 DAG.getConstant(0, dl, MVT::i32));
2790 ConstantSDNode *OrdN = cast<ConstantSDNode>(Op.getOperand(1));
2791 AtomicOrdering Ord = static_cast<AtomicOrdering>(OrdN->getZExtValue());
2792 ARM_MB::MemBOpt Domain = ARM_MB::ISH;
2793 if (Subtarget->isMClass()) {
2794 // Only a full system barrier exists in the M-class architectures.
2795 Domain = ARM_MB::SY;
2796 } else if (Subtarget->isSwift() && Ord == Release) {
2797 // Swift happens to implement ISHST barriers in a way that's compatible with
2798 // Release semantics but weaker than ISH so we'd be fools not to use
2799 // it. Beware: other processors probably don't!
2800 Domain = ARM_MB::ISHST;
2803 return DAG.getNode(ISD::INTRINSIC_VOID, dl, MVT::Other, Op.getOperand(0),
2804 DAG.getConstant(Intrinsic::arm_dmb, dl, MVT::i32),
2805 DAG.getConstant(Domain, dl, MVT::i32));
2808 static SDValue LowerPREFETCH(SDValue Op, SelectionDAG &DAG,
2809 const ARMSubtarget *Subtarget) {
2810 // ARM pre v5TE and Thumb1 does not have preload instructions.
2811 if (!(Subtarget->isThumb2() ||
2812 (!Subtarget->isThumb1Only() && Subtarget->hasV5TEOps())))
2813 // Just preserve the chain.
2814 return Op.getOperand(0);
2817 unsigned isRead = ~cast<ConstantSDNode>(Op.getOperand(2))->getZExtValue() & 1;
2819 (!Subtarget->hasV7Ops() || !Subtarget->hasMPExtension()))
2820 // ARMv7 with MP extension has PLDW.
2821 return Op.getOperand(0);
2823 unsigned isData = cast<ConstantSDNode>(Op.getOperand(4))->getZExtValue();
2824 if (Subtarget->isThumb()) {
2826 isRead = ~isRead & 1;
2827 isData = ~isData & 1;
2830 return DAG.getNode(ARMISD::PRELOAD, dl, MVT::Other, Op.getOperand(0),
2831 Op.getOperand(1), DAG.getConstant(isRead, dl, MVT::i32),
2832 DAG.getConstant(isData, dl, MVT::i32));
2835 static SDValue LowerVASTART(SDValue Op, SelectionDAG &DAG) {
2836 MachineFunction &MF = DAG.getMachineFunction();
2837 ARMFunctionInfo *FuncInfo = MF.getInfo<ARMFunctionInfo>();
2839 // vastart just stores the address of the VarArgsFrameIndex slot into the
2840 // memory location argument.
2842 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy(DAG.getDataLayout());
2843 SDValue FR = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(), PtrVT);
2844 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
2845 return DAG.getStore(Op.getOperand(0), dl, FR, Op.getOperand(1),
2846 MachinePointerInfo(SV), false, false, 0);
2850 ARMTargetLowering::GetF64FormalArgument(CCValAssign &VA, CCValAssign &NextVA,
2851 SDValue &Root, SelectionDAG &DAG,
2853 MachineFunction &MF = DAG.getMachineFunction();
2854 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2856 const TargetRegisterClass *RC;
2857 if (AFI->isThumb1OnlyFunction())
2858 RC = &ARM::tGPRRegClass;
2860 RC = &ARM::GPRRegClass;
2862 // Transform the arguments stored in physical registers into virtual ones.
2863 unsigned Reg = MF.addLiveIn(VA.getLocReg(), RC);
2864 SDValue ArgValue = DAG.getCopyFromReg(Root, dl, Reg, MVT::i32);
2867 if (NextVA.isMemLoc()) {
2868 MachineFrameInfo *MFI = MF.getFrameInfo();
2869 int FI = MFI->CreateFixedObject(4, NextVA.getLocMemOffset(), true);
2871 // Create load node to retrieve arguments from the stack.
2872 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy(DAG.getDataLayout()));
2873 ArgValue2 = DAG.getLoad(MVT::i32, dl, Root, FIN,
2874 MachinePointerInfo::getFixedStack(FI),
2875 false, false, false, 0);
2877 Reg = MF.addLiveIn(NextVA.getLocReg(), RC);
2878 ArgValue2 = DAG.getCopyFromReg(Root, dl, Reg, MVT::i32);
2880 if (!Subtarget->isLittle())
2881 std::swap (ArgValue, ArgValue2);
2882 return DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, ArgValue, ArgValue2);
2885 // The remaining GPRs hold either the beginning of variable-argument
2886 // data, or the beginning of an aggregate passed by value (usually
2887 // byval). Either way, we allocate stack slots adjacent to the data
2888 // provided by our caller, and store the unallocated registers there.
2889 // If this is a variadic function, the va_list pointer will begin with
2890 // these values; otherwise, this reassembles a (byval) structure that
2891 // was split between registers and memory.
2892 // Return: The frame index registers were stored into.
2894 ARMTargetLowering::StoreByValRegs(CCState &CCInfo, SelectionDAG &DAG,
2895 SDLoc dl, SDValue &Chain,
2896 const Value *OrigArg,
2897 unsigned InRegsParamRecordIdx,
2899 unsigned ArgSize) const {
2900 // Currently, two use-cases possible:
2901 // Case #1. Non-var-args function, and we meet first byval parameter.
2902 // Setup first unallocated register as first byval register;
2903 // eat all remained registers
2904 // (these two actions are performed by HandleByVal method).
2905 // Then, here, we initialize stack frame with
2906 // "store-reg" instructions.
2907 // Case #2. Var-args function, that doesn't contain byval parameters.
2908 // The same: eat all remained unallocated registers,
2909 // initialize stack frame.
2911 MachineFunction &MF = DAG.getMachineFunction();
2912 MachineFrameInfo *MFI = MF.getFrameInfo();
2913 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2914 unsigned RBegin, REnd;
2915 if (InRegsParamRecordIdx < CCInfo.getInRegsParamsCount()) {
2916 CCInfo.getInRegsParamInfo(InRegsParamRecordIdx, RBegin, REnd);
2918 unsigned RBeginIdx = CCInfo.getFirstUnallocated(GPRArgRegs);
2919 RBegin = RBeginIdx == 4 ? (unsigned)ARM::R4 : GPRArgRegs[RBeginIdx];
2924 ArgOffset = -4 * (ARM::R4 - RBegin);
2926 auto PtrVT = getPointerTy(DAG.getDataLayout());
2927 int FrameIndex = MFI->CreateFixedObject(ArgSize, ArgOffset, false);
2928 SDValue FIN = DAG.getFrameIndex(FrameIndex, PtrVT);
2930 SmallVector<SDValue, 4> MemOps;
2931 const TargetRegisterClass *RC =
2932 AFI->isThumb1OnlyFunction() ? &ARM::tGPRRegClass : &ARM::GPRRegClass;
2934 for (unsigned Reg = RBegin, i = 0; Reg < REnd; ++Reg, ++i) {
2935 unsigned VReg = MF.addLiveIn(Reg, RC);
2936 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i32);
2938 DAG.getStore(Val.getValue(1), dl, Val, FIN,
2939 MachinePointerInfo(OrigArg, 4 * i), false, false, 0);
2940 MemOps.push_back(Store);
2941 FIN = DAG.getNode(ISD::ADD, dl, PtrVT, FIN, DAG.getConstant(4, dl, PtrVT));
2944 if (!MemOps.empty())
2945 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOps);
2949 // Setup stack frame, the va_list pointer will start from.
2951 ARMTargetLowering::VarArgStyleRegisters(CCState &CCInfo, SelectionDAG &DAG,
2952 SDLoc dl, SDValue &Chain,
2954 unsigned TotalArgRegsSaveSize,
2955 bool ForceMutable) const {
2956 MachineFunction &MF = DAG.getMachineFunction();
2957 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2959 // Try to store any remaining integer argument regs
2960 // to their spots on the stack so that they may be loaded by deferencing
2961 // the result of va_next.
2962 // If there is no regs to be stored, just point address after last
2963 // argument passed via stack.
2964 int FrameIndex = StoreByValRegs(CCInfo, DAG, dl, Chain, nullptr,
2965 CCInfo.getInRegsParamsCount(),
2966 CCInfo.getNextStackOffset(), 4);
2967 AFI->setVarArgsFrameIndex(FrameIndex);
2971 ARMTargetLowering::LowerFormalArguments(SDValue Chain,
2972 CallingConv::ID CallConv, bool isVarArg,
2973 const SmallVectorImpl<ISD::InputArg>
2975 SDLoc dl, SelectionDAG &DAG,
2976 SmallVectorImpl<SDValue> &InVals)
2978 MachineFunction &MF = DAG.getMachineFunction();
2979 MachineFrameInfo *MFI = MF.getFrameInfo();
2981 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2983 // Assign locations to all of the incoming arguments.
2984 SmallVector<CCValAssign, 16> ArgLocs;
2985 ARMCCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(), ArgLocs,
2986 *DAG.getContext(), Prologue);
2987 CCInfo.AnalyzeFormalArguments(Ins,
2988 CCAssignFnForNode(CallConv, /* Return*/ false,
2991 SmallVector<SDValue, 16> ArgValues;
2993 Function::const_arg_iterator CurOrigArg = MF.getFunction()->arg_begin();
2994 unsigned CurArgIdx = 0;
2996 // Initially ArgRegsSaveSize is zero.
2997 // Then we increase this value each time we meet byval parameter.
2998 // We also increase this value in case of varargs function.
2999 AFI->setArgRegsSaveSize(0);
3001 // Calculate the amount of stack space that we need to allocate to store
3002 // byval and variadic arguments that are passed in registers.
3003 // We need to know this before we allocate the first byval or variadic
3004 // argument, as they will be allocated a stack slot below the CFA (Canonical
3005 // Frame Address, the stack pointer at entry to the function).
3006 unsigned ArgRegBegin = ARM::R4;
3007 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
3008 if (CCInfo.getInRegsParamsProcessed() >= CCInfo.getInRegsParamsCount())
3011 CCValAssign &VA = ArgLocs[i];
3012 unsigned Index = VA.getValNo();
3013 ISD::ArgFlagsTy Flags = Ins[Index].Flags;
3014 if (!Flags.isByVal())
3017 assert(VA.isMemLoc() && "unexpected byval pointer in reg");
3018 unsigned RBegin, REnd;
3019 CCInfo.getInRegsParamInfo(CCInfo.getInRegsParamsProcessed(), RBegin, REnd);
3020 ArgRegBegin = std::min(ArgRegBegin, RBegin);
3022 CCInfo.nextInRegsParam();
3024 CCInfo.rewindByValRegsInfo();
3026 int lastInsIndex = -1;
3027 if (isVarArg && MFI->hasVAStart()) {
3028 unsigned RegIdx = CCInfo.getFirstUnallocated(GPRArgRegs);
3029 if (RegIdx != array_lengthof(GPRArgRegs))
3030 ArgRegBegin = std::min(ArgRegBegin, (unsigned)GPRArgRegs[RegIdx]);
3033 unsigned TotalArgRegsSaveSize = 4 * (ARM::R4 - ArgRegBegin);
3034 AFI->setArgRegsSaveSize(TotalArgRegsSaveSize);
3035 auto PtrVT = getPointerTy(DAG.getDataLayout());
3037 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
3038 CCValAssign &VA = ArgLocs[i];
3039 if (Ins[VA.getValNo()].isOrigArg()) {
3040 std::advance(CurOrigArg,
3041 Ins[VA.getValNo()].getOrigArgIndex() - CurArgIdx);
3042 CurArgIdx = Ins[VA.getValNo()].getOrigArgIndex();
3044 // Arguments stored in registers.
3045 if (VA.isRegLoc()) {
3046 EVT RegVT = VA.getLocVT();
3048 if (VA.needsCustom()) {
3049 // f64 and vector types are split up into multiple registers or
3050 // combinations of registers and stack slots.
3051 if (VA.getLocVT() == MVT::v2f64) {
3052 SDValue ArgValue1 = GetF64FormalArgument(VA, ArgLocs[++i],
3054 VA = ArgLocs[++i]; // skip ahead to next loc
3056 if (VA.isMemLoc()) {
3057 int FI = MFI->CreateFixedObject(8, VA.getLocMemOffset(), true);
3058 SDValue FIN = DAG.getFrameIndex(FI, PtrVT);
3059 ArgValue2 = DAG.getLoad(MVT::f64, dl, Chain, FIN,
3060 MachinePointerInfo::getFixedStack(FI),
3061 false, false, false, 0);
3063 ArgValue2 = GetF64FormalArgument(VA, ArgLocs[++i],
3066 ArgValue = DAG.getNode(ISD::UNDEF, dl, MVT::v2f64);
3067 ArgValue = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64,
3068 ArgValue, ArgValue1,
3069 DAG.getIntPtrConstant(0, dl));
3070 ArgValue = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64,
3071 ArgValue, ArgValue2,
3072 DAG.getIntPtrConstant(1, dl));
3074 ArgValue = GetF64FormalArgument(VA, ArgLocs[++i], Chain, DAG, dl);
3077 const TargetRegisterClass *RC;
3079 if (RegVT == MVT::f32)
3080 RC = &ARM::SPRRegClass;
3081 else if (RegVT == MVT::f64)
3082 RC = &ARM::DPRRegClass;
3083 else if (RegVT == MVT::v2f64)
3084 RC = &ARM::QPRRegClass;
3085 else if (RegVT == MVT::i32)
3086 RC = AFI->isThumb1OnlyFunction() ? &ARM::tGPRRegClass
3087 : &ARM::GPRRegClass;
3089 llvm_unreachable("RegVT not supported by FORMAL_ARGUMENTS Lowering");
3091 // Transform the arguments in physical registers into virtual ones.
3092 unsigned Reg = MF.addLiveIn(VA.getLocReg(), RC);
3093 ArgValue = DAG.getCopyFromReg(Chain, dl, Reg, RegVT);
3096 // If this is an 8 or 16-bit value, it is really passed promoted
3097 // to 32 bits. Insert an assert[sz]ext to capture this, then
3098 // truncate to the right size.
3099 switch (VA.getLocInfo()) {
3100 default: llvm_unreachable("Unknown loc info!");
3101 case CCValAssign::Full: break;
3102 case CCValAssign::BCvt:
3103 ArgValue = DAG.getNode(ISD::BITCAST, dl, VA.getValVT(), ArgValue);
3105 case CCValAssign::SExt:
3106 ArgValue = DAG.getNode(ISD::AssertSext, dl, RegVT, ArgValue,
3107 DAG.getValueType(VA.getValVT()));
3108 ArgValue = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), ArgValue);
3110 case CCValAssign::ZExt:
3111 ArgValue = DAG.getNode(ISD::AssertZext, dl, RegVT, ArgValue,
3112 DAG.getValueType(VA.getValVT()));
3113 ArgValue = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), ArgValue);
3117 InVals.push_back(ArgValue);
3119 } else { // VA.isRegLoc()
3122 assert(VA.isMemLoc());
3123 assert(VA.getValVT() != MVT::i64 && "i64 should already be lowered");
3125 int index = VA.getValNo();
3127 // Some Ins[] entries become multiple ArgLoc[] entries.
3128 // Process them only once.
3129 if (index != lastInsIndex)
3131 ISD::ArgFlagsTy Flags = Ins[index].Flags;
3132 // FIXME: For now, all byval parameter objects are marked mutable.
3133 // This can be changed with more analysis.
3134 // In case of tail call optimization mark all arguments mutable.
3135 // Since they could be overwritten by lowering of arguments in case of
3137 if (Flags.isByVal()) {
3138 assert(Ins[index].isOrigArg() &&
3139 "Byval arguments cannot be implicit");
3140 unsigned CurByValIndex = CCInfo.getInRegsParamsProcessed();
3142 int FrameIndex = StoreByValRegs(CCInfo, DAG, dl, Chain, CurOrigArg,
3143 CurByValIndex, VA.getLocMemOffset(),
3144 Flags.getByValSize());
3145 InVals.push_back(DAG.getFrameIndex(FrameIndex, PtrVT));
3146 CCInfo.nextInRegsParam();
3148 unsigned FIOffset = VA.getLocMemOffset();
3149 int FI = MFI->CreateFixedObject(VA.getLocVT().getSizeInBits()/8,
3152 // Create load nodes to retrieve arguments from the stack.
3153 SDValue FIN = DAG.getFrameIndex(FI, PtrVT);
3154 InVals.push_back(DAG.getLoad(VA.getValVT(), dl, Chain, FIN,
3155 MachinePointerInfo::getFixedStack(FI),
3156 false, false, false, 0));
3158 lastInsIndex = index;
3164 if (isVarArg && MFI->hasVAStart())
3165 VarArgStyleRegisters(CCInfo, DAG, dl, Chain,
3166 CCInfo.getNextStackOffset(),
3167 TotalArgRegsSaveSize);
3169 AFI->setArgumentStackSize(CCInfo.getNextStackOffset());
3174 /// isFloatingPointZero - Return true if this is +0.0.
3175 static bool isFloatingPointZero(SDValue Op) {
3176 if (ConstantFPSDNode *CFP = dyn_cast<ConstantFPSDNode>(Op))
3177 return CFP->getValueAPF().isPosZero();
3178 else if (ISD::isEXTLoad(Op.getNode()) || ISD::isNON_EXTLoad(Op.getNode())) {
3179 // Maybe this has already been legalized into the constant pool?
3180 if (Op.getOperand(1).getOpcode() == ARMISD::Wrapper) {
3181 SDValue WrapperOp = Op.getOperand(1).getOperand(0);
3182 if (ConstantPoolSDNode *CP = dyn_cast<ConstantPoolSDNode>(WrapperOp))
3183 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CP->getConstVal()))
3184 return CFP->getValueAPF().isPosZero();
3186 } else if (Op->getOpcode() == ISD::BITCAST &&
3187 Op->getValueType(0) == MVT::f64) {
3188 // Handle (ISD::BITCAST (ARMISD::VMOVIMM (ISD::TargetConstant 0)) MVT::f64)
3189 // created by LowerConstantFP().
3190 SDValue BitcastOp = Op->getOperand(0);
3191 if (BitcastOp->getOpcode() == ARMISD::VMOVIMM) {
3192 SDValue MoveOp = BitcastOp->getOperand(0);
3193 if (MoveOp->getOpcode() == ISD::TargetConstant &&
3194 cast<ConstantSDNode>(MoveOp)->getZExtValue() == 0) {
3202 /// Returns appropriate ARM CMP (cmp) and corresponding condition code for
3203 /// the given operands.
3205 ARMTargetLowering::getARMCmp(SDValue LHS, SDValue RHS, ISD::CondCode CC,
3206 SDValue &ARMcc, SelectionDAG &DAG,
3208 if (ConstantSDNode *RHSC = dyn_cast<ConstantSDNode>(RHS.getNode())) {
3209 unsigned C = RHSC->getZExtValue();
3210 if (!isLegalICmpImmediate(C)) {
3211 // Constant does not fit, try adjusting it by one?
3216 if (C != 0x80000000 && isLegalICmpImmediate(C-1)) {
3217 CC = (CC == ISD::SETLT) ? ISD::SETLE : ISD::SETGT;
3218 RHS = DAG.getConstant(C - 1, dl, MVT::i32);
3223 if (C != 0 && isLegalICmpImmediate(C-1)) {
3224 CC = (CC == ISD::SETULT) ? ISD::SETULE : ISD::SETUGT;
3225 RHS = DAG.getConstant(C - 1, dl, MVT::i32);
3230 if (C != 0x7fffffff && isLegalICmpImmediate(C+1)) {
3231 CC = (CC == ISD::SETLE) ? ISD::SETLT : ISD::SETGE;
3232 RHS = DAG.getConstant(C + 1, dl, MVT::i32);
3237 if (C != 0xffffffff && isLegalICmpImmediate(C+1)) {
3238 CC = (CC == ISD::SETULE) ? ISD::SETULT : ISD::SETUGE;
3239 RHS = DAG.getConstant(C + 1, dl, MVT::i32);
3246 ARMCC::CondCodes CondCode = IntCCToARMCC(CC);
3247 ARMISD::NodeType CompareType;
3250 CompareType = ARMISD::CMP;
3255 CompareType = ARMISD::CMPZ;
3258 ARMcc = DAG.getConstant(CondCode, dl, MVT::i32);
3259 return DAG.getNode(CompareType, dl, MVT::Glue, LHS, RHS);
3262 /// Returns a appropriate VFP CMP (fcmp{s|d}+fmstat) for the given operands.
3264 ARMTargetLowering::getVFPCmp(SDValue LHS, SDValue RHS, SelectionDAG &DAG,
3266 assert(!Subtarget->isFPOnlySP() || RHS.getValueType() != MVT::f64);
3268 if (!isFloatingPointZero(RHS))
3269 Cmp = DAG.getNode(ARMISD::CMPFP, dl, MVT::Glue, LHS, RHS);
3271 Cmp = DAG.getNode(ARMISD::CMPFPw0, dl, MVT::Glue, LHS);
3272 return DAG.getNode(ARMISD::FMSTAT, dl, MVT::Glue, Cmp);
3275 /// duplicateCmp - Glue values can have only one use, so this function
3276 /// duplicates a comparison node.
3278 ARMTargetLowering::duplicateCmp(SDValue Cmp, SelectionDAG &DAG) const {
3279 unsigned Opc = Cmp.getOpcode();
3281 if (Opc == ARMISD::CMP || Opc == ARMISD::CMPZ)
3282 return DAG.getNode(Opc, DL, MVT::Glue, Cmp.getOperand(0),Cmp.getOperand(1));
3284 assert(Opc == ARMISD::FMSTAT && "unexpected comparison operation");
3285 Cmp = Cmp.getOperand(0);
3286 Opc = Cmp.getOpcode();
3287 if (Opc == ARMISD::CMPFP)
3288 Cmp = DAG.getNode(Opc, DL, MVT::Glue, Cmp.getOperand(0),Cmp.getOperand(1));
3290 assert(Opc == ARMISD::CMPFPw0 && "unexpected operand of FMSTAT");
3291 Cmp = DAG.getNode(Opc, DL, MVT::Glue, Cmp.getOperand(0));
3293 return DAG.getNode(ARMISD::FMSTAT, DL, MVT::Glue, Cmp);
3296 std::pair<SDValue, SDValue>
3297 ARMTargetLowering::getARMXALUOOp(SDValue Op, SelectionDAG &DAG,
3298 SDValue &ARMcc) const {
3299 assert(Op.getValueType() == MVT::i32 && "Unsupported value type");
3301 SDValue Value, OverflowCmp;
3302 SDValue LHS = Op.getOperand(0);
3303 SDValue RHS = Op.getOperand(1);
3306 // FIXME: We are currently always generating CMPs because we don't support
3307 // generating CMN through the backend. This is not as good as the natural
3308 // CMP case because it causes a register dependency and cannot be folded
3311 switch (Op.getOpcode()) {
3313 llvm_unreachable("Unknown overflow instruction!");
3315 ARMcc = DAG.getConstant(ARMCC::VC, dl, MVT::i32);
3316 Value = DAG.getNode(ISD::ADD, dl, Op.getValueType(), LHS, RHS);
3317 OverflowCmp = DAG.getNode(ARMISD::CMP, dl, MVT::Glue, Value, LHS);
3320 ARMcc = DAG.getConstant(ARMCC::HS, dl, MVT::i32);
3321 Value = DAG.getNode(ISD::ADD, dl, Op.getValueType(), LHS, RHS);
3322 OverflowCmp = DAG.getNode(ARMISD::CMP, dl, MVT::Glue, Value, LHS);
3325 ARMcc = DAG.getConstant(ARMCC::VC, dl, MVT::i32);
3326 Value = DAG.getNode(ISD::SUB, dl, Op.getValueType(), LHS, RHS);
3327 OverflowCmp = DAG.getNode(ARMISD::CMP, dl, MVT::Glue, LHS, RHS);
3330 ARMcc = DAG.getConstant(ARMCC::HS, dl, MVT::i32);
3331 Value = DAG.getNode(ISD::SUB, dl, Op.getValueType(), LHS, RHS);
3332 OverflowCmp = DAG.getNode(ARMISD::CMP, dl, MVT::Glue, LHS, RHS);
3336 return std::make_pair(Value, OverflowCmp);
3341 ARMTargetLowering::LowerXALUO(SDValue Op, SelectionDAG &DAG) const {
3342 // Let legalize expand this if it isn't a legal type yet.
3343 if (!DAG.getTargetLoweringInfo().isTypeLegal(Op.getValueType()))
3346 SDValue Value, OverflowCmp;
3348 std::tie(Value, OverflowCmp) = getARMXALUOOp(Op, DAG, ARMcc);
3349 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
3351 // We use 0 and 1 as false and true values.
3352 SDValue TVal = DAG.getConstant(1, dl, MVT::i32);
3353 SDValue FVal = DAG.getConstant(0, dl, MVT::i32);
3354 EVT VT = Op.getValueType();
3356 SDValue Overflow = DAG.getNode(ARMISD::CMOV, dl, VT, TVal, FVal,
3357 ARMcc, CCR, OverflowCmp);
3359 SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::i32);
3360 return DAG.getNode(ISD::MERGE_VALUES, dl, VTs, Value, Overflow);
3364 SDValue ARMTargetLowering::LowerSELECT(SDValue Op, SelectionDAG &DAG) const {
3365 SDValue Cond = Op.getOperand(0);
3366 SDValue SelectTrue = Op.getOperand(1);
3367 SDValue SelectFalse = Op.getOperand(2);
3369 unsigned Opc = Cond.getOpcode();
3371 if (Cond.getResNo() == 1 &&
3372 (Opc == ISD::SADDO || Opc == ISD::UADDO || Opc == ISD::SSUBO ||
3373 Opc == ISD::USUBO)) {
3374 if (!DAG.getTargetLoweringInfo().isTypeLegal(Cond->getValueType(0)))
3377 SDValue Value, OverflowCmp;
3379 std::tie(Value, OverflowCmp) = getARMXALUOOp(Cond, DAG, ARMcc);
3380 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
3381 EVT VT = Op.getValueType();
3383 return getCMOV(dl, VT, SelectTrue, SelectFalse, ARMcc, CCR,
3389 // (select (cmov 1, 0, cond), t, f) -> (cmov t, f, cond)
3390 // (select (cmov 0, 1, cond), t, f) -> (cmov f, t, cond)
3392 if (Cond.getOpcode() == ARMISD::CMOV && Cond.hasOneUse()) {
3393 const ConstantSDNode *CMOVTrue =
3394 dyn_cast<ConstantSDNode>(Cond.getOperand(0));
3395 const ConstantSDNode *CMOVFalse =
3396 dyn_cast<ConstantSDNode>(Cond.getOperand(1));
3398 if (CMOVTrue && CMOVFalse) {
3399 unsigned CMOVTrueVal = CMOVTrue->getZExtValue();
3400 unsigned CMOVFalseVal = CMOVFalse->getZExtValue();
3404 if (CMOVTrueVal == 1 && CMOVFalseVal == 0) {
3406 False = SelectFalse;
3407 } else if (CMOVTrueVal == 0 && CMOVFalseVal == 1) {
3412 if (True.getNode() && False.getNode()) {
3413 EVT VT = Op.getValueType();
3414 SDValue ARMcc = Cond.getOperand(2);
3415 SDValue CCR = Cond.getOperand(3);
3416 SDValue Cmp = duplicateCmp(Cond.getOperand(4), DAG);
3417 assert(True.getValueType() == VT);
3418 return getCMOV(dl, VT, True, False, ARMcc, CCR, Cmp, DAG);
3423 // ARM's BooleanContents value is UndefinedBooleanContent. Mask out the
3424 // undefined bits before doing a full-word comparison with zero.
3425 Cond = DAG.getNode(ISD::AND, dl, Cond.getValueType(), Cond,
3426 DAG.getConstant(1, dl, Cond.getValueType()));
3428 return DAG.getSelectCC(dl, Cond,
3429 DAG.getConstant(0, dl, Cond.getValueType()),
3430 SelectTrue, SelectFalse, ISD::SETNE);
3433 static void checkVSELConstraints(ISD::CondCode CC, ARMCC::CondCodes &CondCode,
3434 bool &swpCmpOps, bool &swpVselOps) {
3435 // Start by selecting the GE condition code for opcodes that return true for
3437 if (CC == ISD::SETUGE || CC == ISD::SETOGE || CC == ISD::SETOLE ||
3439 CondCode = ARMCC::GE;
3441 // and GT for opcodes that return false for 'equality'.
3442 else if (CC == ISD::SETUGT || CC == ISD::SETOGT || CC == ISD::SETOLT ||
3444 CondCode = ARMCC::GT;
3446 // Since we are constrained to GE/GT, if the opcode contains 'less', we need
3447 // to swap the compare operands.
3448 if (CC == ISD::SETOLE || CC == ISD::SETULE || CC == ISD::SETOLT ||
3452 // Both GT and GE are ordered comparisons, and return false for 'unordered'.
3453 // If we have an unordered opcode, we need to swap the operands to the VSEL
3454 // instruction (effectively negating the condition).
3456 // This also has the effect of swapping which one of 'less' or 'greater'
3457 // returns true, so we also swap the compare operands. It also switches
3458 // whether we return true for 'equality', so we compensate by picking the
3459 // opposite condition code to our original choice.
3460 if (CC == ISD::SETULE || CC == ISD::SETULT || CC == ISD::SETUGE ||
3461 CC == ISD::SETUGT) {
3462 swpCmpOps = !swpCmpOps;
3463 swpVselOps = !swpVselOps;
3464 CondCode = CondCode == ARMCC::GT ? ARMCC::GE : ARMCC::GT;
3467 // 'ordered' is 'anything but unordered', so use the VS condition code and
3468 // swap the VSEL operands.
3469 if (CC == ISD::SETO) {
3470 CondCode = ARMCC::VS;
3474 // 'unordered or not equal' is 'anything but equal', so use the EQ condition
3475 // code and swap the VSEL operands.
3476 if (CC == ISD::SETUNE) {
3477 CondCode = ARMCC::EQ;
3482 SDValue ARMTargetLowering::getCMOV(SDLoc dl, EVT VT, SDValue FalseVal,
3483 SDValue TrueVal, SDValue ARMcc, SDValue CCR,
3484 SDValue Cmp, SelectionDAG &DAG) const {
3485 if (Subtarget->isFPOnlySP() && VT == MVT::f64) {
3486 FalseVal = DAG.getNode(ARMISD::VMOVRRD, dl,
3487 DAG.getVTList(MVT::i32, MVT::i32), FalseVal);
3488 TrueVal = DAG.getNode(ARMISD::VMOVRRD, dl,
3489 DAG.getVTList(MVT::i32, MVT::i32), TrueVal);
3491 SDValue TrueLow = TrueVal.getValue(0);
3492 SDValue TrueHigh = TrueVal.getValue(1);
3493 SDValue FalseLow = FalseVal.getValue(0);
3494 SDValue FalseHigh = FalseVal.getValue(1);
3496 SDValue Low = DAG.getNode(ARMISD::CMOV, dl, MVT::i32, FalseLow, TrueLow,
3498 SDValue High = DAG.getNode(ARMISD::CMOV, dl, MVT::i32, FalseHigh, TrueHigh,
3499 ARMcc, CCR, duplicateCmp(Cmp, DAG));
3501 return DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Low, High);
3503 return DAG.getNode(ARMISD::CMOV, dl, VT, FalseVal, TrueVal, ARMcc, CCR,
3508 SDValue ARMTargetLowering::LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const {
3509 EVT VT = Op.getValueType();
3510 SDValue LHS = Op.getOperand(0);
3511 SDValue RHS = Op.getOperand(1);
3512 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(4))->get();
3513 SDValue TrueVal = Op.getOperand(2);
3514 SDValue FalseVal = Op.getOperand(3);
3517 if (Subtarget->isFPOnlySP() && LHS.getValueType() == MVT::f64) {
3518 DAG.getTargetLoweringInfo().softenSetCCOperands(DAG, MVT::f64, LHS, RHS, CC,
3521 // If softenSetCCOperands only returned one value, we should compare it to
3523 if (!RHS.getNode()) {
3524 RHS = DAG.getConstant(0, dl, LHS.getValueType());
3529 if (LHS.getValueType() == MVT::i32) {
3530 // Try to generate VSEL on ARMv8.
3531 // The VSEL instruction can't use all the usual ARM condition
3532 // codes: it only has two bits to select the condition code, so it's
3533 // constrained to use only GE, GT, VS and EQ.
3535 // To implement all the various ISD::SETXXX opcodes, we sometimes need to
3536 // swap the operands of the previous compare instruction (effectively
3537 // inverting the compare condition, swapping 'less' and 'greater') and
3538 // sometimes need to swap the operands to the VSEL (which inverts the
3539 // condition in the sense of firing whenever the previous condition didn't)
3540 if (Subtarget->hasFPARMv8() && (TrueVal.getValueType() == MVT::f32 ||
3541 TrueVal.getValueType() == MVT::f64)) {
3542 ARMCC::CondCodes CondCode = IntCCToARMCC(CC);
3543 if (CondCode == ARMCC::LT || CondCode == ARMCC::LE ||
3544 CondCode == ARMCC::VC || CondCode == ARMCC::NE) {
3545 CC = ISD::getSetCCInverse(CC, true);
3546 std::swap(TrueVal, FalseVal);
3551 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
3552 SDValue Cmp = getARMCmp(LHS, RHS, CC, ARMcc, DAG, dl);
3553 return getCMOV(dl, VT, FalseVal, TrueVal, ARMcc, CCR, Cmp, DAG);
3556 ARMCC::CondCodes CondCode, CondCode2;
3557 FPCCToARMCC(CC, CondCode, CondCode2);
3559 // Try to generate VMAXNM/VMINNM on ARMv8.
3560 if (Subtarget->hasFPARMv8() && (TrueVal.getValueType() == MVT::f32 ||
3561 TrueVal.getValueType() == MVT::f64)) {
3562 // We can use VMAXNM/VMINNM for a compare followed by a select with the
3563 // same operands, as follows:
3564 // c = fcmp [?gt, ?ge, ?lt, ?le] a, b
3566 // In NoNaNsFPMath the CC will have been changed from, e.g., 'ogt' to 'gt'.
3567 bool swapSides = false;
3568 if (!getTargetMachine().Options.NoNaNsFPMath) {
3569 // transformability may depend on which way around we compare
3577 // the non-NaN should be RHS
3578 swapSides = DAG.isKnownNeverNaN(LHS) && !DAG.isKnownNeverNaN(RHS);
3584 // the non-NaN should be LHS
3585 swapSides = DAG.isKnownNeverNaN(RHS) && !DAG.isKnownNeverNaN(LHS);
3589 swapSides = swapSides || (LHS == FalseVal && RHS == TrueVal);
3591 CC = ISD::getSetCCSwappedOperands(CC);
3592 std::swap(LHS, RHS);
3594 if (LHS == TrueVal && RHS == FalseVal) {
3595 bool canTransform = true;
3596 // FIXME: FastMathFlags::noSignedZeros() doesn't appear reachable from here
3597 if (!getTargetMachine().Options.UnsafeFPMath &&
3598 !DAG.isKnownNeverZero(LHS) && !DAG.isKnownNeverZero(RHS)) {
3599 const ConstantFPSDNode *Zero;
3606 // RHS must not be -0
3607 canTransform = (Zero = dyn_cast<ConstantFPSDNode>(RHS)) &&
3608 !Zero->isNegative();
3613 // LHS must not be -0
3614 canTransform = (Zero = dyn_cast<ConstantFPSDNode>(LHS)) &&
3615 !Zero->isNegative();
3620 // RHS must not be +0
3621 canTransform = (Zero = dyn_cast<ConstantFPSDNode>(RHS)) &&
3627 // LHS must not be +0
3628 canTransform = (Zero = dyn_cast<ConstantFPSDNode>(LHS)) &&
3634 // Note: If one of the elements in a pair is a number and the other
3635 // element is NaN, the corresponding result element is the number.
3636 // This is consistent with the IEEE 754-2008 standard.
3637 // Therefore, a > b ? a : b <=> vmax(a,b), if b is constant and a is NaN
3643 if (!DAG.isKnownNeverNaN(RHS))
3645 return DAG.getNode(ARMISD::VMAXNM, dl, VT, LHS, RHS);
3648 if (!DAG.isKnownNeverNaN(LHS))
3652 return DAG.getNode(ARMISD::VMAXNM, dl, VT, LHS, RHS);
3655 if (!DAG.isKnownNeverNaN(RHS))
3657 return DAG.getNode(ARMISD::VMINNM, dl, VT, LHS, RHS);
3660 if (!DAG.isKnownNeverNaN(LHS))
3664 return DAG.getNode(ARMISD::VMINNM, dl, VT, LHS, RHS);
3669 bool swpCmpOps = false;
3670 bool swpVselOps = false;
3671 checkVSELConstraints(CC, CondCode, swpCmpOps, swpVselOps);
3673 if (CondCode == ARMCC::GT || CondCode == ARMCC::GE ||
3674 CondCode == ARMCC::VS || CondCode == ARMCC::EQ) {
3676 std::swap(LHS, RHS);
3678 std::swap(TrueVal, FalseVal);
3682 SDValue ARMcc = DAG.getConstant(CondCode, dl, MVT::i32);
3683 SDValue Cmp = getVFPCmp(LHS, RHS, DAG, dl);
3684 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
3685 SDValue Result = getCMOV(dl, VT, FalseVal, TrueVal, ARMcc, CCR, Cmp, DAG);
3686 if (CondCode2 != ARMCC::AL) {
3687 SDValue ARMcc2 = DAG.getConstant(CondCode2, dl, MVT::i32);
3688 // FIXME: Needs another CMP because flag can have but one use.
3689 SDValue Cmp2 = getVFPCmp(LHS, RHS, DAG, dl);
3690 Result = getCMOV(dl, VT, Result, TrueVal, ARMcc2, CCR, Cmp2, DAG);
3695 /// canChangeToInt - Given the fp compare operand, return true if it is suitable
3696 /// to morph to an integer compare sequence.
3697 static bool canChangeToInt(SDValue Op, bool &SeenZero,
3698 const ARMSubtarget *Subtarget) {
3699 SDNode *N = Op.getNode();
3700 if (!N->hasOneUse())
3701 // Otherwise it requires moving the value from fp to integer registers.
3703 if (!N->getNumValues())
3705 EVT VT = Op.getValueType();
3706 if (VT != MVT::f32 && !Subtarget->isFPBrccSlow())
3707 // f32 case is generally profitable. f64 case only makes sense when vcmpe +
3708 // vmrs are very slow, e.g. cortex-a8.
3711 if (isFloatingPointZero(Op)) {
3715 return ISD::isNormalLoad(N);
3718 static SDValue bitcastf32Toi32(SDValue Op, SelectionDAG &DAG) {
3719 if (isFloatingPointZero(Op))
3720 return DAG.getConstant(0, SDLoc(Op), MVT::i32);
3722 if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Op))
3723 return DAG.getLoad(MVT::i32, SDLoc(Op),
3724 Ld->getChain(), Ld->getBasePtr(), Ld->getPointerInfo(),
3725 Ld->isVolatile(), Ld->isNonTemporal(),
3726 Ld->isInvariant(), Ld->getAlignment());
3728 llvm_unreachable("Unknown VFP cmp argument!");
3731 static void expandf64Toi32(SDValue Op, SelectionDAG &DAG,
3732 SDValue &RetVal1, SDValue &RetVal2) {
3735 if (isFloatingPointZero(Op)) {
3736 RetVal1 = DAG.getConstant(0, dl, MVT::i32);
3737 RetVal2 = DAG.getConstant(0, dl, MVT::i32);
3741 if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Op)) {
3742 SDValue Ptr = Ld->getBasePtr();
3743 RetVal1 = DAG.getLoad(MVT::i32, dl,
3744 Ld->getChain(), Ptr,
3745 Ld->getPointerInfo(),
3746 Ld->isVolatile(), Ld->isNonTemporal(),
3747 Ld->isInvariant(), Ld->getAlignment());
3749 EVT PtrType = Ptr.getValueType();
3750 unsigned NewAlign = MinAlign(Ld->getAlignment(), 4);
3751 SDValue NewPtr = DAG.getNode(ISD::ADD, dl,
3752 PtrType, Ptr, DAG.getConstant(4, dl, PtrType));
3753 RetVal2 = DAG.getLoad(MVT::i32, dl,
3754 Ld->getChain(), NewPtr,
3755 Ld->getPointerInfo().getWithOffset(4),
3756 Ld->isVolatile(), Ld->isNonTemporal(),
3757 Ld->isInvariant(), NewAlign);
3761 llvm_unreachable("Unknown VFP cmp argument!");
3764 /// OptimizeVFPBrcond - With -enable-unsafe-fp-math, it's legal to optimize some
3765 /// f32 and even f64 comparisons to integer ones.
3767 ARMTargetLowering::OptimizeVFPBrcond(SDValue Op, SelectionDAG &DAG) const {
3768 SDValue Chain = Op.getOperand(0);
3769 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(1))->get();
3770 SDValue LHS = Op.getOperand(2);
3771 SDValue RHS = Op.getOperand(3);
3772 SDValue Dest = Op.getOperand(4);
3775 bool LHSSeenZero = false;
3776 bool LHSOk = canChangeToInt(LHS, LHSSeenZero, Subtarget);
3777 bool RHSSeenZero = false;
3778 bool RHSOk = canChangeToInt(RHS, RHSSeenZero, Subtarget);
3779 if (LHSOk && RHSOk && (LHSSeenZero || RHSSeenZero)) {
3780 // If unsafe fp math optimization is enabled and there are no other uses of
3781 // the CMP operands, and the condition code is EQ or NE, we can optimize it
3782 // to an integer comparison.
3783 if (CC == ISD::SETOEQ)
3785 else if (CC == ISD::SETUNE)
3788 SDValue Mask = DAG.getConstant(0x7fffffff, dl, MVT::i32);
3790 if (LHS.getValueType() == MVT::f32) {
3791 LHS = DAG.getNode(ISD::AND, dl, MVT::i32,
3792 bitcastf32Toi32(LHS, DAG), Mask);
3793 RHS = DAG.getNode(ISD::AND, dl, MVT::i32,
3794 bitcastf32Toi32(RHS, DAG), Mask);
3795 SDValue Cmp = getARMCmp(LHS, RHS, CC, ARMcc, DAG, dl);
3796 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
3797 return DAG.getNode(ARMISD::BRCOND, dl, MVT::Other,
3798 Chain, Dest, ARMcc, CCR, Cmp);
3803 expandf64Toi32(LHS, DAG, LHS1, LHS2);
3804 expandf64Toi32(RHS, DAG, RHS1, RHS2);
3805 LHS2 = DAG.getNode(ISD::AND, dl, MVT::i32, LHS2, Mask);
3806 RHS2 = DAG.getNode(ISD::AND, dl, MVT::i32, RHS2, Mask);
3807 ARMCC::CondCodes CondCode = IntCCToARMCC(CC);
3808 ARMcc = DAG.getConstant(CondCode, dl, MVT::i32);
3809 SDVTList VTList = DAG.getVTList(MVT::Other, MVT::Glue);
3810 SDValue Ops[] = { Chain, ARMcc, LHS1, LHS2, RHS1, RHS2, Dest };
3811 return DAG.getNode(ARMISD::BCC_i64, dl, VTList, Ops);
3817 SDValue ARMTargetLowering::LowerBR_CC(SDValue Op, SelectionDAG &DAG) const {
3818 SDValue Chain = Op.getOperand(0);
3819 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(1))->get();
3820 SDValue LHS = Op.getOperand(2);
3821 SDValue RHS = Op.getOperand(3);
3822 SDValue Dest = Op.getOperand(4);
3825 if (Subtarget->isFPOnlySP() && LHS.getValueType() == MVT::f64) {
3826 DAG.getTargetLoweringInfo().softenSetCCOperands(DAG, MVT::f64, LHS, RHS, CC,
3829 // If softenSetCCOperands only returned one value, we should compare it to
3831 if (!RHS.getNode()) {
3832 RHS = DAG.getConstant(0, dl, LHS.getValueType());
3837 if (LHS.getValueType() == MVT::i32) {
3839 SDValue Cmp = getARMCmp(LHS, RHS, CC, ARMcc, DAG, dl);
3840 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
3841 return DAG.getNode(ARMISD::BRCOND, dl, MVT::Other,
3842 Chain, Dest, ARMcc, CCR, Cmp);
3845 assert(LHS.getValueType() == MVT::f32 || LHS.getValueType() == MVT::f64);
3847 if (getTargetMachine().Options.UnsafeFPMath &&
3848 (CC == ISD::SETEQ || CC == ISD::SETOEQ ||
3849 CC == ISD::SETNE || CC == ISD::SETUNE)) {
3850 SDValue Result = OptimizeVFPBrcond(Op, DAG);
3851 if (Result.getNode())
3855 ARMCC::CondCodes CondCode, CondCode2;
3856 FPCCToARMCC(CC, CondCode, CondCode2);
3858 SDValue ARMcc = DAG.getConstant(CondCode, dl, MVT::i32);
3859 SDValue Cmp = getVFPCmp(LHS, RHS, DAG, dl);
3860 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
3861 SDVTList VTList = DAG.getVTList(MVT::Other, MVT::Glue);
3862 SDValue Ops[] = { Chain, Dest, ARMcc, CCR, Cmp };
3863 SDValue Res = DAG.getNode(ARMISD::BRCOND, dl, VTList, Ops);
3864 if (CondCode2 != ARMCC::AL) {
3865 ARMcc = DAG.getConstant(CondCode2, dl, MVT::i32);
3866 SDValue Ops[] = { Res, Dest, ARMcc, CCR, Res.getValue(1) };
3867 Res = DAG.getNode(ARMISD::BRCOND, dl, VTList, Ops);
3872 SDValue ARMTargetLowering::LowerBR_JT(SDValue Op, SelectionDAG &DAG) const {
3873 SDValue Chain = Op.getOperand(0);
3874 SDValue Table = Op.getOperand(1);
3875 SDValue Index = Op.getOperand(2);
3878 EVT PTy = getPointerTy(DAG.getDataLayout());
3879 JumpTableSDNode *JT = cast<JumpTableSDNode>(Table);
3880 SDValue JTI = DAG.getTargetJumpTable(JT->getIndex(), PTy);
3881 Table = DAG.getNode(ARMISD::WrapperJT, dl, MVT::i32, JTI);
3882 Index = DAG.getNode(ISD::MUL, dl, PTy, Index, DAG.getConstant(4, dl, PTy));
3883 SDValue Addr = DAG.getNode(ISD::ADD, dl, PTy, Index, Table);
3884 if (Subtarget->isThumb2()) {
3885 // Thumb2 uses a two-level jump. That is, it jumps into the jump table
3886 // which does another jump to the destination. This also makes it easier
3887 // to translate it to TBB / TBH later.
3888 // FIXME: This might not work if the function is extremely large.
3889 return DAG.getNode(ARMISD::BR2_JT, dl, MVT::Other, Chain,
3890 Addr, Op.getOperand(2), JTI);
3892 if (getTargetMachine().getRelocationModel() == Reloc::PIC_) {
3893 Addr = DAG.getLoad((EVT)MVT::i32, dl, Chain, Addr,
3894 MachinePointerInfo::getJumpTable(),
3895 false, false, false, 0);
3896 Chain = Addr.getValue(1);
3897 Addr = DAG.getNode(ISD::ADD, dl, PTy, Addr, Table);
3898 return DAG.getNode(ARMISD::BR_JT, dl, MVT::Other, Chain, Addr, JTI);
3900 Addr = DAG.getLoad(PTy, dl, Chain, Addr,
3901 MachinePointerInfo::getJumpTable(),
3902 false, false, false, 0);
3903 Chain = Addr.getValue(1);
3904 return DAG.getNode(ARMISD::BR_JT, dl, MVT::Other, Chain, Addr, JTI);
3908 static SDValue LowerVectorFP_TO_INT(SDValue Op, SelectionDAG &DAG) {
3909 EVT VT = Op.getValueType();
3912 if (Op.getValueType().getVectorElementType() == MVT::i32) {
3913 if (Op.getOperand(0).getValueType().getVectorElementType() == MVT::f32)
3915 return DAG.UnrollVectorOp(Op.getNode());
3918 assert(Op.getOperand(0).getValueType() == MVT::v4f32 &&
3919 "Invalid type for custom lowering!");
3920 if (VT != MVT::v4i16)
3921 return DAG.UnrollVectorOp(Op.getNode());
3923 Op = DAG.getNode(Op.getOpcode(), dl, MVT::v4i32, Op.getOperand(0));
3924 return DAG.getNode(ISD::TRUNCATE, dl, VT, Op);
3927 SDValue ARMTargetLowering::LowerFP_TO_INT(SDValue Op, SelectionDAG &DAG) const {
3928 EVT VT = Op.getValueType();
3930 return LowerVectorFP_TO_INT(Op, DAG);
3931 if (Subtarget->isFPOnlySP() && Op.getOperand(0).getValueType() == MVT::f64) {
3933 if (Op.getOpcode() == ISD::FP_TO_SINT)
3934 LC = RTLIB::getFPTOSINT(Op.getOperand(0).getValueType(),
3937 LC = RTLIB::getFPTOUINT(Op.getOperand(0).getValueType(),
3939 return makeLibCall(DAG, LC, Op.getValueType(), &Op.getOperand(0), 1,
3940 /*isSigned*/ false, SDLoc(Op)).first;
3946 static SDValue LowerVectorINT_TO_FP(SDValue Op, SelectionDAG &DAG) {
3947 EVT VT = Op.getValueType();
3950 if (Op.getOperand(0).getValueType().getVectorElementType() == MVT::i32) {
3951 if (VT.getVectorElementType() == MVT::f32)
3953 return DAG.UnrollVectorOp(Op.getNode());
3956 assert(Op.getOperand(0).getValueType() == MVT::v4i16 &&
3957 "Invalid type for custom lowering!");
3958 if (VT != MVT::v4f32)
3959 return DAG.UnrollVectorOp(Op.getNode());
3963 switch (Op.getOpcode()) {
3964 default: llvm_unreachable("Invalid opcode!");
3965 case ISD::SINT_TO_FP:
3966 CastOpc = ISD::SIGN_EXTEND;
3967 Opc = ISD::SINT_TO_FP;
3969 case ISD::UINT_TO_FP:
3970 CastOpc = ISD::ZERO_EXTEND;
3971 Opc = ISD::UINT_TO_FP;
3975 Op = DAG.getNode(CastOpc, dl, MVT::v4i32, Op.getOperand(0));
3976 return DAG.getNode(Opc, dl, VT, Op);
3979 SDValue ARMTargetLowering::LowerINT_TO_FP(SDValue Op, SelectionDAG &DAG) const {
3980 EVT VT = Op.getValueType();
3982 return LowerVectorINT_TO_FP(Op, DAG);
3983 if (Subtarget->isFPOnlySP() && Op.getValueType() == MVT::f64) {
3985 if (Op.getOpcode() == ISD::SINT_TO_FP)
3986 LC = RTLIB::getSINTTOFP(Op.getOperand(0).getValueType(),
3989 LC = RTLIB::getUINTTOFP(Op.getOperand(0).getValueType(),
3991 return makeLibCall(DAG, LC, Op.getValueType(), &Op.getOperand(0), 1,
3992 /*isSigned*/ false, SDLoc(Op)).first;
3998 SDValue ARMTargetLowering::LowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) const {
3999 // Implement fcopysign with a fabs and a conditional fneg.
4000 SDValue Tmp0 = Op.getOperand(0);
4001 SDValue Tmp1 = Op.getOperand(1);
4003 EVT VT = Op.getValueType();
4004 EVT SrcVT = Tmp1.getValueType();
4005 bool InGPR = Tmp0.getOpcode() == ISD::BITCAST ||
4006 Tmp0.getOpcode() == ARMISD::VMOVDRR;
4007 bool UseNEON = !InGPR && Subtarget->hasNEON();
4010 // Use VBSL to copy the sign bit.
4011 unsigned EncodedVal = ARM_AM::createNEONModImm(0x6, 0x80);
4012 SDValue Mask = DAG.getNode(ARMISD::VMOVIMM, dl, MVT::v2i32,
4013 DAG.getTargetConstant(EncodedVal, dl, MVT::i32));
4014 EVT OpVT = (VT == MVT::f32) ? MVT::v2i32 : MVT::v1i64;
4016 Mask = DAG.getNode(ARMISD::VSHL, dl, OpVT,
4017 DAG.getNode(ISD::BITCAST, dl, OpVT, Mask),
4018 DAG.getConstant(32, dl, MVT::i32));
4019 else /*if (VT == MVT::f32)*/
4020 Tmp0 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2f32, Tmp0);
4021 if (SrcVT == MVT::f32) {
4022 Tmp1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2f32, Tmp1);
4024 Tmp1 = DAG.getNode(ARMISD::VSHL, dl, OpVT,
4025 DAG.getNode(ISD::BITCAST, dl, OpVT, Tmp1),
4026 DAG.getConstant(32, dl, MVT::i32));
4027 } else if (VT == MVT::f32)
4028 Tmp1 = DAG.getNode(ARMISD::VSHRu, dl, MVT::v1i64,
4029 DAG.getNode(ISD::BITCAST, dl, MVT::v1i64, Tmp1),
4030 DAG.getConstant(32, dl, MVT::i32));
4031 Tmp0 = DAG.getNode(ISD::BITCAST, dl, OpVT, Tmp0);
4032 Tmp1 = DAG.getNode(ISD::BITCAST, dl, OpVT, Tmp1);
4034 SDValue AllOnes = DAG.getTargetConstant(ARM_AM::createNEONModImm(0xe, 0xff),
4036 AllOnes = DAG.getNode(ARMISD::VMOVIMM, dl, MVT::v8i8, AllOnes);
4037 SDValue MaskNot = DAG.getNode(ISD::XOR, dl, OpVT, Mask,
4038 DAG.getNode(ISD::BITCAST, dl, OpVT, AllOnes));
4040 SDValue Res = DAG.getNode(ISD::OR, dl, OpVT,
4041 DAG.getNode(ISD::AND, dl, OpVT, Tmp1, Mask),
4042 DAG.getNode(ISD::AND, dl, OpVT, Tmp0, MaskNot));
4043 if (VT == MVT::f32) {
4044 Res = DAG.getNode(ISD::BITCAST, dl, MVT::v2f32, Res);
4045 Res = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f32, Res,
4046 DAG.getConstant(0, dl, MVT::i32));
4048 Res = DAG.getNode(ISD::BITCAST, dl, MVT::f64, Res);
4054 // Bitcast operand 1 to i32.
4055 if (SrcVT == MVT::f64)
4056 Tmp1 = DAG.getNode(ARMISD::VMOVRRD, dl, DAG.getVTList(MVT::i32, MVT::i32),
4058 Tmp1 = DAG.getNode(ISD::BITCAST, dl, MVT::i32, Tmp1);
4060 // Or in the signbit with integer operations.
4061 SDValue Mask1 = DAG.getConstant(0x80000000, dl, MVT::i32);
4062 SDValue Mask2 = DAG.getConstant(0x7fffffff, dl, MVT::i32);
4063 Tmp1 = DAG.getNode(ISD::AND, dl, MVT::i32, Tmp1, Mask1);
4064 if (VT == MVT::f32) {
4065 Tmp0 = DAG.getNode(ISD::AND, dl, MVT::i32,
4066 DAG.getNode(ISD::BITCAST, dl, MVT::i32, Tmp0), Mask2);
4067 return DAG.getNode(ISD::BITCAST, dl, MVT::f32,
4068 DAG.getNode(ISD::OR, dl, MVT::i32, Tmp0, Tmp1));
4071 // f64: Or the high part with signbit and then combine two parts.
4072 Tmp0 = DAG.getNode(ARMISD::VMOVRRD, dl, DAG.getVTList(MVT::i32, MVT::i32),
4074 SDValue Lo = Tmp0.getValue(0);
4075 SDValue Hi = DAG.getNode(ISD::AND, dl, MVT::i32, Tmp0.getValue(1), Mask2);
4076 Hi = DAG.getNode(ISD::OR, dl, MVT::i32, Hi, Tmp1);
4077 return DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi);
4080 SDValue ARMTargetLowering::LowerRETURNADDR(SDValue Op, SelectionDAG &DAG) const{
4081 MachineFunction &MF = DAG.getMachineFunction();
4082 MachineFrameInfo *MFI = MF.getFrameInfo();
4083 MFI->setReturnAddressIsTaken(true);
4085 if (verifyReturnAddressArgumentIsConstant(Op, DAG))
4088 EVT VT = Op.getValueType();
4090 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
4092 SDValue FrameAddr = LowerFRAMEADDR(Op, DAG);
4093 SDValue Offset = DAG.getConstant(4, dl, MVT::i32);
4094 return DAG.getLoad(VT, dl, DAG.getEntryNode(),
4095 DAG.getNode(ISD::ADD, dl, VT, FrameAddr, Offset),
4096 MachinePointerInfo(), false, false, false, 0);
4099 // Return LR, which contains the return address. Mark it an implicit live-in.
4100 unsigned Reg = MF.addLiveIn(ARM::LR, getRegClassFor(MVT::i32));
4101 return DAG.getCopyFromReg(DAG.getEntryNode(), dl, Reg, VT);
4104 SDValue ARMTargetLowering::LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const {
4105 const ARMBaseRegisterInfo &ARI =
4106 *static_cast<const ARMBaseRegisterInfo*>(RegInfo);
4107 MachineFunction &MF = DAG.getMachineFunction();
4108 MachineFrameInfo *MFI = MF.getFrameInfo();
4109 MFI->setFrameAddressIsTaken(true);
4111 EVT VT = Op.getValueType();
4112 SDLoc dl(Op); // FIXME probably not meaningful
4113 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
4114 unsigned FrameReg = ARI.getFrameRegister(MF);
4115 SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, FrameReg, VT);
4117 FrameAddr = DAG.getLoad(VT, dl, DAG.getEntryNode(), FrameAddr,
4118 MachinePointerInfo(),
4119 false, false, false, 0);
4123 // FIXME? Maybe this could be a TableGen attribute on some registers and
4124 // this table could be generated automatically from RegInfo.
4125 unsigned ARMTargetLowering::getRegisterByName(const char* RegName, EVT VT,
4126 SelectionDAG &DAG) const {
4127 unsigned Reg = StringSwitch<unsigned>(RegName)
4128 .Case("sp", ARM::SP)
4132 report_fatal_error(Twine("Invalid register name \""
4133 + StringRef(RegName) + "\"."));
4136 // Result is 64 bit value so split into two 32 bit values and return as a
4138 static void ExpandREAD_REGISTER(SDNode *N, SmallVectorImpl<SDValue> &Results,
4139 SelectionDAG &DAG) {
4142 // This function is only supposed to be called for i64 type destination.
4143 assert(N->getValueType(0) == MVT::i64
4144 && "ExpandREAD_REGISTER called for non-i64 type result.");
4146 SDValue Read = DAG.getNode(ISD::READ_REGISTER, DL,
4147 DAG.getVTList(MVT::i32, MVT::i32, MVT::Other),
4151 Results.push_back(DAG.getNode(ISD::BUILD_PAIR, DL, MVT::i64, Read.getValue(0),
4153 Results.push_back(Read.getOperand(0));
4156 /// ExpandBITCAST - If the target supports VFP, this function is called to
4157 /// expand a bit convert where either the source or destination type is i64 to
4158 /// use a VMOVDRR or VMOVRRD node. This should not be done when the non-i64
4159 /// operand type is illegal (e.g., v2f32 for a target that doesn't support
4160 /// vectors), since the legalizer won't know what to do with that.
4161 static SDValue ExpandBITCAST(SDNode *N, SelectionDAG &DAG) {
4162 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
4164 SDValue Op = N->getOperand(0);
4166 // This function is only supposed to be called for i64 types, either as the
4167 // source or destination of the bit convert.
4168 EVT SrcVT = Op.getValueType();
4169 EVT DstVT = N->getValueType(0);
4170 assert((SrcVT == MVT::i64 || DstVT == MVT::i64) &&
4171 "ExpandBITCAST called for non-i64 type");
4173 // Turn i64->f64 into VMOVDRR.
4174 if (SrcVT == MVT::i64 && TLI.isTypeLegal(DstVT)) {
4175 SDValue Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, Op,
4176 DAG.getConstant(0, dl, MVT::i32));
4177 SDValue Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, Op,
4178 DAG.getConstant(1, dl, MVT::i32));
4179 return DAG.getNode(ISD::BITCAST, dl, DstVT,
4180 DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi));
4183 // Turn f64->i64 into VMOVRRD.
4184 if (DstVT == MVT::i64 && TLI.isTypeLegal(SrcVT)) {
4186 if (DAG.getDataLayout().isBigEndian() && SrcVT.isVector() &&
4187 SrcVT.getVectorNumElements() > 1)
4188 Cvt = DAG.getNode(ARMISD::VMOVRRD, dl,
4189 DAG.getVTList(MVT::i32, MVT::i32),
4190 DAG.getNode(ARMISD::VREV64, dl, SrcVT, Op));
4192 Cvt = DAG.getNode(ARMISD::VMOVRRD, dl,
4193 DAG.getVTList(MVT::i32, MVT::i32), Op);
4194 // Merge the pieces into a single i64 value.
4195 return DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Cvt, Cvt.getValue(1));
4201 /// getZeroVector - Returns a vector of specified type with all zero elements.
4202 /// Zero vectors are used to represent vector negation and in those cases
4203 /// will be implemented with the NEON VNEG instruction. However, VNEG does
4204 /// not support i64 elements, so sometimes the zero vectors will need to be
4205 /// explicitly constructed. Regardless, use a canonical VMOV to create the
4207 static SDValue getZeroVector(EVT VT, SelectionDAG &DAG, SDLoc dl) {
4208 assert(VT.isVector() && "Expected a vector type");
4209 // The canonical modified immediate encoding of a zero vector is....0!
4210 SDValue EncodedVal = DAG.getTargetConstant(0, dl, MVT::i32);
4211 EVT VmovVT = VT.is128BitVector() ? MVT::v4i32 : MVT::v2i32;
4212 SDValue Vmov = DAG.getNode(ARMISD::VMOVIMM, dl, VmovVT, EncodedVal);
4213 return DAG.getNode(ISD::BITCAST, dl, VT, Vmov);
4216 /// LowerShiftRightParts - Lower SRA_PARTS, which returns two
4217 /// i32 values and take a 2 x i32 value to shift plus a shift amount.
4218 SDValue ARMTargetLowering::LowerShiftRightParts(SDValue Op,
4219 SelectionDAG &DAG) const {
4220 assert(Op.getNumOperands() == 3 && "Not a double-shift!");
4221 EVT VT = Op.getValueType();
4222 unsigned VTBits = VT.getSizeInBits();
4224 SDValue ShOpLo = Op.getOperand(0);
4225 SDValue ShOpHi = Op.getOperand(1);
4226 SDValue ShAmt = Op.getOperand(2);
4228 unsigned Opc = (Op.getOpcode() == ISD::SRA_PARTS) ? ISD::SRA : ISD::SRL;
4230 assert(Op.getOpcode() == ISD::SRA_PARTS || Op.getOpcode() == ISD::SRL_PARTS);
4232 SDValue RevShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32,
4233 DAG.getConstant(VTBits, dl, MVT::i32), ShAmt);
4234 SDValue Tmp1 = DAG.getNode(ISD::SRL, dl, VT, ShOpLo, ShAmt);
4235 SDValue ExtraShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32, ShAmt,
4236 DAG.getConstant(VTBits, dl, MVT::i32));
4237 SDValue Tmp2 = DAG.getNode(ISD::SHL, dl, VT, ShOpHi, RevShAmt);
4238 SDValue FalseVal = DAG.getNode(ISD::OR, dl, VT, Tmp1, Tmp2);
4239 SDValue TrueVal = DAG.getNode(Opc, dl, VT, ShOpHi, ExtraShAmt);
4241 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
4242 SDValue Cmp = getARMCmp(ExtraShAmt, DAG.getConstant(0, dl, MVT::i32),
4243 ISD::SETGE, ARMcc, DAG, dl);
4244 SDValue Hi = DAG.getNode(Opc, dl, VT, ShOpHi, ShAmt);
4245 SDValue Lo = DAG.getNode(ARMISD::CMOV, dl, VT, FalseVal, TrueVal, ARMcc,
4248 SDValue Ops[2] = { Lo, Hi };
4249 return DAG.getMergeValues(Ops, dl);
4252 /// LowerShiftLeftParts - Lower SHL_PARTS, which returns two
4253 /// i32 values and take a 2 x i32 value to shift plus a shift amount.
4254 SDValue ARMTargetLowering::LowerShiftLeftParts(SDValue Op,
4255 SelectionDAG &DAG) const {
4256 assert(Op.getNumOperands() == 3 && "Not a double-shift!");
4257 EVT VT = Op.getValueType();
4258 unsigned VTBits = VT.getSizeInBits();
4260 SDValue ShOpLo = Op.getOperand(0);
4261 SDValue ShOpHi = Op.getOperand(1);
4262 SDValue ShAmt = Op.getOperand(2);
4265 assert(Op.getOpcode() == ISD::SHL_PARTS);
4266 SDValue RevShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32,
4267 DAG.getConstant(VTBits, dl, MVT::i32), ShAmt);
4268 SDValue Tmp1 = DAG.getNode(ISD::SRL, dl, VT, ShOpLo, RevShAmt);
4269 SDValue ExtraShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32, ShAmt,
4270 DAG.getConstant(VTBits, dl, MVT::i32));
4271 SDValue Tmp2 = DAG.getNode(ISD::SHL, dl, VT, ShOpHi, ShAmt);
4272 SDValue Tmp3 = DAG.getNode(ISD::SHL, dl, VT, ShOpLo, ExtraShAmt);
4274 SDValue FalseVal = DAG.getNode(ISD::OR, dl, VT, Tmp1, Tmp2);
4275 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
4276 SDValue Cmp = getARMCmp(ExtraShAmt, DAG.getConstant(0, dl, MVT::i32),
4277 ISD::SETGE, ARMcc, DAG, dl);
4278 SDValue Lo = DAG.getNode(ISD::SHL, dl, VT, ShOpLo, ShAmt);
4279 SDValue Hi = DAG.getNode(ARMISD::CMOV, dl, VT, FalseVal, Tmp3, ARMcc,
4282 SDValue Ops[2] = { Lo, Hi };
4283 return DAG.getMergeValues(Ops, dl);
4286 SDValue ARMTargetLowering::LowerFLT_ROUNDS_(SDValue Op,
4287 SelectionDAG &DAG) const {
4288 // The rounding mode is in bits 23:22 of the FPSCR.
4289 // The ARM rounding mode value to FLT_ROUNDS mapping is 0->1, 1->2, 2->3, 3->0
4290 // The formula we use to implement this is (((FPSCR + 1 << 22) >> 22) & 3)
4291 // so that the shift + and get folded into a bitfield extract.
4293 SDValue FPSCR = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::i32,
4294 DAG.getConstant(Intrinsic::arm_get_fpscr, dl,
4296 SDValue FltRounds = DAG.getNode(ISD::ADD, dl, MVT::i32, FPSCR,
4297 DAG.getConstant(1U << 22, dl, MVT::i32));
4298 SDValue RMODE = DAG.getNode(ISD::SRL, dl, MVT::i32, FltRounds,
4299 DAG.getConstant(22, dl, MVT::i32));
4300 return DAG.getNode(ISD::AND, dl, MVT::i32, RMODE,
4301 DAG.getConstant(3, dl, MVT::i32));
4304 static SDValue LowerCTTZ(SDNode *N, SelectionDAG &DAG,
4305 const ARMSubtarget *ST) {
4307 EVT VT = N->getValueType(0);
4308 if (VT.isVector()) {
4309 assert(ST->hasNEON());
4311 // Compute the least significant set bit: LSB = X & -X
4312 SDValue X = N->getOperand(0);
4313 SDValue NX = DAG.getNode(ISD::SUB, dl, VT, getZeroVector(VT, DAG, dl), X);
4314 SDValue LSB = DAG.getNode(ISD::AND, dl, VT, X, NX);
4316 EVT ElemTy = VT.getVectorElementType();
4318 if (ElemTy == MVT::i8) {
4319 // Compute with: cttz(x) = ctpop(lsb - 1)
4320 SDValue One = DAG.getNode(ARMISD::VMOVIMM, dl, VT,
4321 DAG.getTargetConstant(1, dl, ElemTy));
4322 SDValue Bits = DAG.getNode(ISD::SUB, dl, VT, LSB, One);
4323 return DAG.getNode(ISD::CTPOP, dl, VT, Bits);
4326 if ((ElemTy == MVT::i16 || ElemTy == MVT::i32) &&
4327 (N->getOpcode() == ISD::CTTZ_ZERO_UNDEF)) {
4328 // Compute with: cttz(x) = (width - 1) - ctlz(lsb), if x != 0
4329 unsigned NumBits = ElemTy.getSizeInBits();
4330 SDValue WidthMinus1 =
4331 DAG.getNode(ARMISD::VMOVIMM, dl, VT,
4332 DAG.getTargetConstant(NumBits - 1, dl, ElemTy));
4333 SDValue CTLZ = DAG.getNode(ISD::CTLZ, dl, VT, LSB);
4334 return DAG.getNode(ISD::SUB, dl, VT, WidthMinus1, CTLZ);
4337 // Compute with: cttz(x) = ctpop(lsb - 1)
4339 // Since we can only compute the number of bits in a byte with vcnt.8, we
4340 // have to gather the result with pairwise addition (vpaddl) for i16, i32,
4345 if (ElemTy == MVT::i64) {
4346 // Load constant 0xffff'ffff'ffff'ffff to register.
4347 SDValue FF = DAG.getNode(ARMISD::VMOVIMM, dl, VT,
4348 DAG.getTargetConstant(0x1eff, dl, MVT::i32));
4349 Bits = DAG.getNode(ISD::ADD, dl, VT, LSB, FF);
4351 SDValue One = DAG.getNode(ARMISD::VMOVIMM, dl, VT,
4352 DAG.getTargetConstant(1, dl, ElemTy));
4353 Bits = DAG.getNode(ISD::SUB, dl, VT, LSB, One);
4356 // Count #bits with vcnt.8.
4357 EVT VT8Bit = VT.is64BitVector() ? MVT::v8i8 : MVT::v16i8;
4358 SDValue BitsVT8 = DAG.getNode(ISD::BITCAST, dl, VT8Bit, Bits);
4359 SDValue Cnt8 = DAG.getNode(ISD::CTPOP, dl, VT8Bit, BitsVT8);
4361 // Gather the #bits with vpaddl (pairwise add.)
4362 EVT VT16Bit = VT.is64BitVector() ? MVT::v4i16 : MVT::v8i16;
4363 SDValue Cnt16 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT16Bit,
4364 DAG.getTargetConstant(Intrinsic::arm_neon_vpaddlu, dl, MVT::i32),
4366 if (ElemTy == MVT::i16)
4369 EVT VT32Bit = VT.is64BitVector() ? MVT::v2i32 : MVT::v4i32;
4370 SDValue Cnt32 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT32Bit,
4371 DAG.getTargetConstant(Intrinsic::arm_neon_vpaddlu, dl, MVT::i32),
4373 if (ElemTy == MVT::i32)
4376 assert(ElemTy == MVT::i64);
4377 SDValue Cnt64 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
4378 DAG.getTargetConstant(Intrinsic::arm_neon_vpaddlu, dl, MVT::i32),
4383 if (!ST->hasV6T2Ops())
4386 SDValue rbit = DAG.getNode(ARMISD::RBIT, dl, VT, N->getOperand(0));
4387 return DAG.getNode(ISD::CTLZ, dl, VT, rbit);
4390 /// getCTPOP16BitCounts - Returns a v8i8/v16i8 vector containing the bit-count
4391 /// for each 16-bit element from operand, repeated. The basic idea is to
4392 /// leverage vcnt to get the 8-bit counts, gather and add the results.
4394 /// Trace for v4i16:
4395 /// input = [v0 v1 v2 v3 ] (vi 16-bit element)
4396 /// cast: N0 = [w0 w1 w2 w3 w4 w5 w6 w7] (v0 = [w0 w1], wi 8-bit element)
4397 /// vcnt: N1 = [b0 b1 b2 b3 b4 b5 b6 b7] (bi = bit-count of 8-bit element wi)
4398 /// vrev: N2 = [b1 b0 b3 b2 b5 b4 b7 b6]
4399 /// [b0 b1 b2 b3 b4 b5 b6 b7]
4400 /// +[b1 b0 b3 b2 b5 b4 b7 b6]
4401 /// N3=N1+N2 = [k0 k0 k1 k1 k2 k2 k3 k3] (k0 = b0+b1 = bit-count of 16-bit v0,
4402 /// vuzp: = [k0 k1 k2 k3 k0 k1 k2 k3] each ki is 8-bits)
4403 static SDValue getCTPOP16BitCounts(SDNode *N, SelectionDAG &DAG) {
4404 EVT VT = N->getValueType(0);
4407 EVT VT8Bit = VT.is64BitVector() ? MVT::v8i8 : MVT::v16i8;
4408 SDValue N0 = DAG.getNode(ISD::BITCAST, DL, VT8Bit, N->getOperand(0));
4409 SDValue N1 = DAG.getNode(ISD::CTPOP, DL, VT8Bit, N0);
4410 SDValue N2 = DAG.getNode(ARMISD::VREV16, DL, VT8Bit, N1);
4411 SDValue N3 = DAG.getNode(ISD::ADD, DL, VT8Bit, N1, N2);
4412 return DAG.getNode(ARMISD::VUZP, DL, VT8Bit, N3, N3);
4415 /// lowerCTPOP16BitElements - Returns a v4i16/v8i16 vector containing the
4416 /// bit-count for each 16-bit element from the operand. We need slightly
4417 /// different sequencing for v4i16 and v8i16 to stay within NEON's available
4418 /// 64/128-bit registers.
4420 /// Trace for v4i16:
4421 /// input = [v0 v1 v2 v3 ] (vi 16-bit element)
4422 /// v8i8: BitCounts = [k0 k1 k2 k3 k0 k1 k2 k3 ] (ki is the bit-count of vi)
4423 /// v8i16:Extended = [k0 k1 k2 k3 k0 k1 k2 k3 ]
4424 /// v4i16:Extracted = [k0 k1 k2 k3 ]
4425 static SDValue lowerCTPOP16BitElements(SDNode *N, SelectionDAG &DAG) {
4426 EVT VT = N->getValueType(0);
4429 SDValue BitCounts = getCTPOP16BitCounts(N, DAG);
4430 if (VT.is64BitVector()) {
4431 SDValue Extended = DAG.getNode(ISD::ZERO_EXTEND, DL, MVT::v8i16, BitCounts);
4432 return DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, MVT::v4i16, Extended,
4433 DAG.getIntPtrConstant(0, DL));
4435 SDValue Extracted = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, MVT::v8i8,
4436 BitCounts, DAG.getIntPtrConstant(0, DL));
4437 return DAG.getNode(ISD::ZERO_EXTEND, DL, MVT::v8i16, Extracted);
4441 /// lowerCTPOP32BitElements - Returns a v2i32/v4i32 vector containing the
4442 /// bit-count for each 32-bit element from the operand. The idea here is
4443 /// to split the vector into 16-bit elements, leverage the 16-bit count
4444 /// routine, and then combine the results.
4446 /// Trace for v2i32 (v4i32 similar with Extracted/Extended exchanged):
4447 /// input = [v0 v1 ] (vi: 32-bit elements)
4448 /// Bitcast = [w0 w1 w2 w3 ] (wi: 16-bit elements, v0 = [w0 w1])
4449 /// Counts16 = [k0 k1 k2 k3 ] (ki: 16-bit elements, bit-count of wi)
4450 /// vrev: N0 = [k1 k0 k3 k2 ]
4452 /// N1 =+[k1 k0 k3 k2 ]
4454 /// N2 =+[k1 k3 k0 k2 ]
4456 /// Extended =+[k1 k3 k0 k2 ]
4458 /// Extracted=+[k1 k3 ]
4460 static SDValue lowerCTPOP32BitElements(SDNode *N, SelectionDAG &DAG) {
4461 EVT VT = N->getValueType(0);
4464 EVT VT16Bit = VT.is64BitVector() ? MVT::v4i16 : MVT::v8i16;
4466 SDValue Bitcast = DAG.getNode(ISD::BITCAST, DL, VT16Bit, N->getOperand(0));
4467 SDValue Counts16 = lowerCTPOP16BitElements(Bitcast.getNode(), DAG);
4468 SDValue N0 = DAG.getNode(ARMISD::VREV32, DL, VT16Bit, Counts16);
4469 SDValue N1 = DAG.getNode(ISD::ADD, DL, VT16Bit, Counts16, N0);
4470 SDValue N2 = DAG.getNode(ARMISD::VUZP, DL, VT16Bit, N1, N1);
4472 if (VT.is64BitVector()) {
4473 SDValue Extended = DAG.getNode(ISD::ZERO_EXTEND, DL, MVT::v4i32, N2);
4474 return DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, MVT::v2i32, Extended,
4475 DAG.getIntPtrConstant(0, DL));
4477 SDValue Extracted = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, MVT::v4i16, N2,
4478 DAG.getIntPtrConstant(0, DL));
4479 return DAG.getNode(ISD::ZERO_EXTEND, DL, MVT::v4i32, Extracted);
4483 static SDValue LowerCTPOP(SDNode *N, SelectionDAG &DAG,
4484 const ARMSubtarget *ST) {
4485 EVT VT = N->getValueType(0);
4487 assert(ST->hasNEON() && "Custom ctpop lowering requires NEON.");
4488 assert((VT == MVT::v2i32 || VT == MVT::v4i32 ||
4489 VT == MVT::v4i16 || VT == MVT::v8i16) &&
4490 "Unexpected type for custom ctpop lowering");
4492 if (VT.getVectorElementType() == MVT::i32)
4493 return lowerCTPOP32BitElements(N, DAG);
4495 return lowerCTPOP16BitElements(N, DAG);
4498 static SDValue LowerShift(SDNode *N, SelectionDAG &DAG,
4499 const ARMSubtarget *ST) {
4500 EVT VT = N->getValueType(0);
4506 // Lower vector shifts on NEON to use VSHL.
4507 assert(ST->hasNEON() && "unexpected vector shift");
4509 // Left shifts translate directly to the vshiftu intrinsic.
4510 if (N->getOpcode() == ISD::SHL)
4511 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
4512 DAG.getConstant(Intrinsic::arm_neon_vshiftu, dl,
4514 N->getOperand(0), N->getOperand(1));
4516 assert((N->getOpcode() == ISD::SRA ||
4517 N->getOpcode() == ISD::SRL) && "unexpected vector shift opcode");
4519 // NEON uses the same intrinsics for both left and right shifts. For
4520 // right shifts, the shift amounts are negative, so negate the vector of
4522 EVT ShiftVT = N->getOperand(1).getValueType();
4523 SDValue NegatedCount = DAG.getNode(ISD::SUB, dl, ShiftVT,
4524 getZeroVector(ShiftVT, DAG, dl),
4526 Intrinsic::ID vshiftInt = (N->getOpcode() == ISD::SRA ?
4527 Intrinsic::arm_neon_vshifts :
4528 Intrinsic::arm_neon_vshiftu);
4529 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
4530 DAG.getConstant(vshiftInt, dl, MVT::i32),
4531 N->getOperand(0), NegatedCount);
4534 static SDValue Expand64BitShift(SDNode *N, SelectionDAG &DAG,
4535 const ARMSubtarget *ST) {
4536 EVT VT = N->getValueType(0);
4539 // We can get here for a node like i32 = ISD::SHL i32, i64
4543 assert((N->getOpcode() == ISD::SRL || N->getOpcode() == ISD::SRA) &&
4544 "Unknown shift to lower!");
4546 // We only lower SRA, SRL of 1 here, all others use generic lowering.
4547 if (!isa<ConstantSDNode>(N->getOperand(1)) ||
4548 cast<ConstantSDNode>(N->getOperand(1))->getZExtValue() != 1)
4551 // If we are in thumb mode, we don't have RRX.
4552 if (ST->isThumb1Only()) return SDValue();
4554 // Okay, we have a 64-bit SRA or SRL of 1. Lower this to an RRX expr.
4555 SDValue Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(0),
4556 DAG.getConstant(0, dl, MVT::i32));
4557 SDValue Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(0),
4558 DAG.getConstant(1, dl, MVT::i32));
4560 // First, build a SRA_FLAG/SRL_FLAG op, which shifts the top part by one and
4561 // captures the result into a carry flag.
4562 unsigned Opc = N->getOpcode() == ISD::SRL ? ARMISD::SRL_FLAG:ARMISD::SRA_FLAG;
4563 Hi = DAG.getNode(Opc, dl, DAG.getVTList(MVT::i32, MVT::Glue), Hi);
4565 // The low part is an ARMISD::RRX operand, which shifts the carry in.
4566 Lo = DAG.getNode(ARMISD::RRX, dl, MVT::i32, Lo, Hi.getValue(1));
4568 // Merge the pieces into a single i64 value.
4569 return DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Lo, Hi);
4572 static SDValue LowerVSETCC(SDValue Op, SelectionDAG &DAG) {
4573 SDValue TmpOp0, TmpOp1;
4574 bool Invert = false;
4578 SDValue Op0 = Op.getOperand(0);
4579 SDValue Op1 = Op.getOperand(1);
4580 SDValue CC = Op.getOperand(2);
4581 EVT CmpVT = Op0.getValueType().changeVectorElementTypeToInteger();
4582 EVT VT = Op.getValueType();
4583 ISD::CondCode SetCCOpcode = cast<CondCodeSDNode>(CC)->get();
4586 if (CmpVT.getVectorElementType() == MVT::i64)
4587 // 64-bit comparisons are not legal. We've marked SETCC as non-Custom,
4588 // but it's possible that our operands are 64-bit but our result is 32-bit.
4589 // Bail in this case.
4592 if (Op1.getValueType().isFloatingPoint()) {
4593 switch (SetCCOpcode) {
4594 default: llvm_unreachable("Illegal FP comparison");
4596 case ISD::SETNE: Invert = true; // Fallthrough
4598 case ISD::SETEQ: Opc = ARMISD::VCEQ; break;
4600 case ISD::SETLT: Swap = true; // Fallthrough
4602 case ISD::SETGT: Opc = ARMISD::VCGT; break;
4604 case ISD::SETLE: Swap = true; // Fallthrough
4606 case ISD::SETGE: Opc = ARMISD::VCGE; break;
4607 case ISD::SETUGE: Swap = true; // Fallthrough
4608 case ISD::SETULE: Invert = true; Opc = ARMISD::VCGT; break;
4609 case ISD::SETUGT: Swap = true; // Fallthrough
4610 case ISD::SETULT: Invert = true; Opc = ARMISD::VCGE; break;
4611 case ISD::SETUEQ: Invert = true; // Fallthrough
4613 // Expand this to (OLT | OGT).
4617 Op0 = DAG.getNode(ARMISD::VCGT, dl, CmpVT, TmpOp1, TmpOp0);
4618 Op1 = DAG.getNode(ARMISD::VCGT, dl, CmpVT, TmpOp0, TmpOp1);
4620 case ISD::SETUO: Invert = true; // Fallthrough
4622 // Expand this to (OLT | OGE).
4626 Op0 = DAG.getNode(ARMISD::VCGT, dl, CmpVT, TmpOp1, TmpOp0);
4627 Op1 = DAG.getNode(ARMISD::VCGE, dl, CmpVT, TmpOp0, TmpOp1);
4631 // Integer comparisons.
4632 switch (SetCCOpcode) {
4633 default: llvm_unreachable("Illegal integer comparison");
4634 case ISD::SETNE: Invert = true;
4635 case ISD::SETEQ: Opc = ARMISD::VCEQ; break;
4636 case ISD::SETLT: Swap = true;
4637 case ISD::SETGT: Opc = ARMISD::VCGT; break;
4638 case ISD::SETLE: Swap = true;
4639 case ISD::SETGE: Opc = ARMISD::VCGE; break;
4640 case ISD::SETULT: Swap = true;
4641 case ISD::SETUGT: Opc = ARMISD::VCGTU; break;
4642 case ISD::SETULE: Swap = true;
4643 case ISD::SETUGE: Opc = ARMISD::VCGEU; break;
4646 // Detect VTST (Vector Test Bits) = icmp ne (and (op0, op1), zero).
4647 if (Opc == ARMISD::VCEQ) {
4650 if (ISD::isBuildVectorAllZeros(Op1.getNode()))
4652 else if (ISD::isBuildVectorAllZeros(Op0.getNode()))
4655 // Ignore bitconvert.
4656 if (AndOp.getNode() && AndOp.getOpcode() == ISD::BITCAST)
4657 AndOp = AndOp.getOperand(0);
4659 if (AndOp.getNode() && AndOp.getOpcode() == ISD::AND) {
4661 Op0 = DAG.getNode(ISD::BITCAST, dl, CmpVT, AndOp.getOperand(0));
4662 Op1 = DAG.getNode(ISD::BITCAST, dl, CmpVT, AndOp.getOperand(1));
4669 std::swap(Op0, Op1);
4671 // If one of the operands is a constant vector zero, attempt to fold the
4672 // comparison to a specialized compare-against-zero form.
4674 if (ISD::isBuildVectorAllZeros(Op1.getNode()))
4676 else if (ISD::isBuildVectorAllZeros(Op0.getNode())) {
4677 if (Opc == ARMISD::VCGE)
4678 Opc = ARMISD::VCLEZ;
4679 else if (Opc == ARMISD::VCGT)
4680 Opc = ARMISD::VCLTZ;
4685 if (SingleOp.getNode()) {
4688 Result = DAG.getNode(ARMISD::VCEQZ, dl, CmpVT, SingleOp); break;
4690 Result = DAG.getNode(ARMISD::VCGEZ, dl, CmpVT, SingleOp); break;
4692 Result = DAG.getNode(ARMISD::VCLEZ, dl, CmpVT, SingleOp); break;
4694 Result = DAG.getNode(ARMISD::VCGTZ, dl, CmpVT, SingleOp); break;
4696 Result = DAG.getNode(ARMISD::VCLTZ, dl, CmpVT, SingleOp); break;
4698 Result = DAG.getNode(Opc, dl, CmpVT, Op0, Op1);
4701 Result = DAG.getNode(Opc, dl, CmpVT, Op0, Op1);
4704 Result = DAG.getSExtOrTrunc(Result, dl, VT);
4707 Result = DAG.getNOT(dl, Result, VT);
4712 /// isNEONModifiedImm - Check if the specified splat value corresponds to a
4713 /// valid vector constant for a NEON instruction with a "modified immediate"
4714 /// operand (e.g., VMOV). If so, return the encoded value.
4715 static SDValue isNEONModifiedImm(uint64_t SplatBits, uint64_t SplatUndef,
4716 unsigned SplatBitSize, SelectionDAG &DAG,
4717 SDLoc dl, EVT &VT, bool is128Bits,
4718 NEONModImmType type) {
4719 unsigned OpCmode, Imm;
4721 // SplatBitSize is set to the smallest size that splats the vector, so a
4722 // zero vector will always have SplatBitSize == 8. However, NEON modified
4723 // immediate instructions others than VMOV do not support the 8-bit encoding
4724 // of a zero vector, and the default encoding of zero is supposed to be the
4729 switch (SplatBitSize) {
4731 if (type != VMOVModImm)
4733 // Any 1-byte value is OK. Op=0, Cmode=1110.
4734 assert((SplatBits & ~0xff) == 0 && "one byte splat value is too big");
4737 VT = is128Bits ? MVT::v16i8 : MVT::v8i8;
4741 // NEON's 16-bit VMOV supports splat values where only one byte is nonzero.
4742 VT = is128Bits ? MVT::v8i16 : MVT::v4i16;
4743 if ((SplatBits & ~0xff) == 0) {
4744 // Value = 0x00nn: Op=x, Cmode=100x.
4749 if ((SplatBits & ~0xff00) == 0) {
4750 // Value = 0xnn00: Op=x, Cmode=101x.
4752 Imm = SplatBits >> 8;
4758 // NEON's 32-bit VMOV supports splat values where:
4759 // * only one byte is nonzero, or
4760 // * the least significant byte is 0xff and the second byte is nonzero, or
4761 // * the least significant 2 bytes are 0xff and the third is nonzero.
4762 VT = is128Bits ? MVT::v4i32 : MVT::v2i32;
4763 if ((SplatBits & ~0xff) == 0) {
4764 // Value = 0x000000nn: Op=x, Cmode=000x.
4769 if ((SplatBits & ~0xff00) == 0) {
4770 // Value = 0x0000nn00: Op=x, Cmode=001x.
4772 Imm = SplatBits >> 8;
4775 if ((SplatBits & ~0xff0000) == 0) {
4776 // Value = 0x00nn0000: Op=x, Cmode=010x.
4778 Imm = SplatBits >> 16;
4781 if ((SplatBits & ~0xff000000) == 0) {
4782 // Value = 0xnn000000: Op=x, Cmode=011x.
4784 Imm = SplatBits >> 24;
4788 // cmode == 0b1100 and cmode == 0b1101 are not supported for VORR or VBIC
4789 if (type == OtherModImm) return SDValue();
4791 if ((SplatBits & ~0xffff) == 0 &&
4792 ((SplatBits | SplatUndef) & 0xff) == 0xff) {
4793 // Value = 0x0000nnff: Op=x, Cmode=1100.
4795 Imm = SplatBits >> 8;
4799 if ((SplatBits & ~0xffffff) == 0 &&
4800 ((SplatBits | SplatUndef) & 0xffff) == 0xffff) {
4801 // Value = 0x00nnffff: Op=x, Cmode=1101.
4803 Imm = SplatBits >> 16;
4807 // Note: there are a few 32-bit splat values (specifically: 00ffff00,
4808 // ff000000, ff0000ff, and ffff00ff) that are valid for VMOV.I64 but not
4809 // VMOV.I32. A (very) minor optimization would be to replicate the value
4810 // and fall through here to test for a valid 64-bit splat. But, then the
4811 // caller would also need to check and handle the change in size.
4815 if (type != VMOVModImm)
4817 // NEON has a 64-bit VMOV splat where each byte is either 0 or 0xff.
4818 uint64_t BitMask = 0xff;
4820 unsigned ImmMask = 1;
4822 for (int ByteNum = 0; ByteNum < 8; ++ByteNum) {
4823 if (((SplatBits | SplatUndef) & BitMask) == BitMask) {
4826 } else if ((SplatBits & BitMask) != 0) {
4833 if (DAG.getDataLayout().isBigEndian())
4834 // swap higher and lower 32 bit word
4835 Imm = ((Imm & 0xf) << 4) | ((Imm & 0xf0) >> 4);
4837 // Op=1, Cmode=1110.
4839 VT = is128Bits ? MVT::v2i64 : MVT::v1i64;
4844 llvm_unreachable("unexpected size for isNEONModifiedImm");
4847 unsigned EncodedVal = ARM_AM::createNEONModImm(OpCmode, Imm);
4848 return DAG.getTargetConstant(EncodedVal, dl, MVT::i32);
4851 SDValue ARMTargetLowering::LowerConstantFP(SDValue Op, SelectionDAG &DAG,
4852 const ARMSubtarget *ST) const {
4856 bool IsDouble = Op.getValueType() == MVT::f64;
4857 ConstantFPSDNode *CFP = cast<ConstantFPSDNode>(Op);
4859 // Use the default (constant pool) lowering for double constants when we have
4861 if (IsDouble && Subtarget->isFPOnlySP())
4864 // Try splatting with a VMOV.f32...
4865 APFloat FPVal = CFP->getValueAPF();
4866 int ImmVal = IsDouble ? ARM_AM::getFP64Imm(FPVal) : ARM_AM::getFP32Imm(FPVal);
4869 if (IsDouble || !ST->useNEONForSinglePrecisionFP()) {
4870 // We have code in place to select a valid ConstantFP already, no need to
4875 // It's a float and we are trying to use NEON operations where
4876 // possible. Lower it to a splat followed by an extract.
4878 SDValue NewVal = DAG.getTargetConstant(ImmVal, DL, MVT::i32);
4879 SDValue VecConstant = DAG.getNode(ARMISD::VMOVFPIMM, DL, MVT::v2f32,
4881 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, MVT::f32, VecConstant,
4882 DAG.getConstant(0, DL, MVT::i32));
4885 // The rest of our options are NEON only, make sure that's allowed before
4887 if (!ST->hasNEON() || (!IsDouble && !ST->useNEONForSinglePrecisionFP()))
4891 uint64_t iVal = FPVal.bitcastToAPInt().getZExtValue();
4893 // It wouldn't really be worth bothering for doubles except for one very
4894 // important value, which does happen to match: 0.0. So make sure we don't do
4896 if (IsDouble && (iVal & 0xffffffff) != (iVal >> 32))
4899 // Try a VMOV.i32 (FIXME: i8, i16, or i64 could work too).
4900 SDValue NewVal = isNEONModifiedImm(iVal & 0xffffffffU, 0, 32, DAG, SDLoc(Op),
4901 VMovVT, false, VMOVModImm);
4902 if (NewVal != SDValue()) {
4904 SDValue VecConstant = DAG.getNode(ARMISD::VMOVIMM, DL, VMovVT,
4907 return DAG.getNode(ISD::BITCAST, DL, MVT::f64, VecConstant);
4909 // It's a float: cast and extract a vector element.
4910 SDValue VecFConstant = DAG.getNode(ISD::BITCAST, DL, MVT::v2f32,
4912 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, MVT::f32, VecFConstant,
4913 DAG.getConstant(0, DL, MVT::i32));
4916 // Finally, try a VMVN.i32
4917 NewVal = isNEONModifiedImm(~iVal & 0xffffffffU, 0, 32, DAG, SDLoc(Op), VMovVT,
4919 if (NewVal != SDValue()) {
4921 SDValue VecConstant = DAG.getNode(ARMISD::VMVNIMM, DL, VMovVT, NewVal);
4924 return DAG.getNode(ISD::BITCAST, DL, MVT::f64, VecConstant);
4926 // It's a float: cast and extract a vector element.
4927 SDValue VecFConstant = DAG.getNode(ISD::BITCAST, DL, MVT::v2f32,
4929 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, MVT::f32, VecFConstant,
4930 DAG.getConstant(0, DL, MVT::i32));
4936 // check if an VEXT instruction can handle the shuffle mask when the
4937 // vector sources of the shuffle are the same.
4938 static bool isSingletonVEXTMask(ArrayRef<int> M, EVT VT, unsigned &Imm) {
4939 unsigned NumElts = VT.getVectorNumElements();
4941 // Assume that the first shuffle index is not UNDEF. Fail if it is.
4947 // If this is a VEXT shuffle, the immediate value is the index of the first
4948 // element. The other shuffle indices must be the successive elements after
4950 unsigned ExpectedElt = Imm;
4951 for (unsigned i = 1; i < NumElts; ++i) {
4952 // Increment the expected index. If it wraps around, just follow it
4953 // back to index zero and keep going.
4955 if (ExpectedElt == NumElts)
4958 if (M[i] < 0) continue; // ignore UNDEF indices
4959 if (ExpectedElt != static_cast<unsigned>(M[i]))
4967 static bool isVEXTMask(ArrayRef<int> M, EVT VT,
4968 bool &ReverseVEXT, unsigned &Imm) {
4969 unsigned NumElts = VT.getVectorNumElements();
4970 ReverseVEXT = false;
4972 // Assume that the first shuffle index is not UNDEF. Fail if it is.
4978 // If this is a VEXT shuffle, the immediate value is the index of the first
4979 // element. The other shuffle indices must be the successive elements after
4981 unsigned ExpectedElt = Imm;
4982 for (unsigned i = 1; i < NumElts; ++i) {
4983 // Increment the expected index. If it wraps around, it may still be
4984 // a VEXT but the source vectors must be swapped.
4986 if (ExpectedElt == NumElts * 2) {
4991 if (M[i] < 0) continue; // ignore UNDEF indices
4992 if (ExpectedElt != static_cast<unsigned>(M[i]))
4996 // Adjust the index value if the source operands will be swapped.
5003 /// isVREVMask - Check if a vector shuffle corresponds to a VREV
5004 /// instruction with the specified blocksize. (The order of the elements
5005 /// within each block of the vector is reversed.)
5006 static bool isVREVMask(ArrayRef<int> M, EVT VT, unsigned BlockSize) {
5007 assert((BlockSize==16 || BlockSize==32 || BlockSize==64) &&
5008 "Only possible block sizes for VREV are: 16, 32, 64");
5010 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
5014 unsigned NumElts = VT.getVectorNumElements();
5015 unsigned BlockElts = M[0] + 1;
5016 // If the first shuffle index is UNDEF, be optimistic.
5018 BlockElts = BlockSize / EltSz;
5020 if (BlockSize <= EltSz || BlockSize != BlockElts * EltSz)
5023 for (unsigned i = 0; i < NumElts; ++i) {
5024 if (M[i] < 0) continue; // ignore UNDEF indices
5025 if ((unsigned) M[i] != (i - i%BlockElts) + (BlockElts - 1 - i%BlockElts))
5032 static bool isVTBLMask(ArrayRef<int> M, EVT VT) {
5033 // We can handle <8 x i8> vector shuffles. If the index in the mask is out of
5034 // range, then 0 is placed into the resulting vector. So pretty much any mask
5035 // of 8 elements can work here.
5036 return VT == MVT::v8i8 && M.size() == 8;
5039 static bool isVTRNMask(ArrayRef<int> M, EVT VT, unsigned &WhichResult) {
5040 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
5044 unsigned NumElts = VT.getVectorNumElements();
5045 WhichResult = (M[0] == 0 ? 0 : 1);
5046 for (unsigned i = 0; i < NumElts; i += 2) {
5047 if ((M[i] >= 0 && (unsigned) M[i] != i + WhichResult) ||
5048 (M[i+1] >= 0 && (unsigned) M[i+1] != i + NumElts + WhichResult))
5054 /// isVTRN_v_undef_Mask - Special case of isVTRNMask for canonical form of
5055 /// "vector_shuffle v, v", i.e., "vector_shuffle v, undef".
5056 /// Mask is e.g., <0, 0, 2, 2> instead of <0, 4, 2, 6>.
5057 static bool isVTRN_v_undef_Mask(ArrayRef<int> M, EVT VT, unsigned &WhichResult){
5058 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
5062 unsigned NumElts = VT.getVectorNumElements();
5063 WhichResult = (M[0] == 0 ? 0 : 1);
5064 for (unsigned i = 0; i < NumElts; i += 2) {
5065 if ((M[i] >= 0 && (unsigned) M[i] != i + WhichResult) ||
5066 (M[i+1] >= 0 && (unsigned) M[i+1] != i + WhichResult))
5072 static bool isVUZPMask(ArrayRef<int> M, EVT VT, unsigned &WhichResult) {
5073 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
5077 unsigned NumElts = VT.getVectorNumElements();
5078 WhichResult = (M[0] == 0 ? 0 : 1);
5079 for (unsigned i = 0; i != NumElts; ++i) {
5080 if (M[i] < 0) continue; // ignore UNDEF indices
5081 if ((unsigned) M[i] != 2 * i + WhichResult)
5085 // VUZP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32.
5086 if (VT.is64BitVector() && EltSz == 32)
5092 /// isVUZP_v_undef_Mask - Special case of isVUZPMask for canonical form of
5093 /// "vector_shuffle v, v", i.e., "vector_shuffle v, undef".
5094 /// Mask is e.g., <0, 2, 0, 2> instead of <0, 2, 4, 6>,
5095 static bool isVUZP_v_undef_Mask(ArrayRef<int> M, EVT VT, unsigned &WhichResult){
5096 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
5100 unsigned Half = VT.getVectorNumElements() / 2;
5101 WhichResult = (M[0] == 0 ? 0 : 1);
5102 for (unsigned j = 0; j != 2; ++j) {
5103 unsigned Idx = WhichResult;
5104 for (unsigned i = 0; i != Half; ++i) {
5105 int MIdx = M[i + j * Half];
5106 if (MIdx >= 0 && (unsigned) MIdx != Idx)
5112 // VUZP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32.
5113 if (VT.is64BitVector() && EltSz == 32)
5119 static bool isVZIPMask(ArrayRef<int> M, EVT VT, unsigned &WhichResult) {
5120 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
5124 unsigned NumElts = VT.getVectorNumElements();
5125 WhichResult = (M[0] == 0 ? 0 : 1);
5126 unsigned Idx = WhichResult * NumElts / 2;
5127 for (unsigned i = 0; i != NumElts; i += 2) {
5128 if ((M[i] >= 0 && (unsigned) M[i] != Idx) ||
5129 (M[i+1] >= 0 && (unsigned) M[i+1] != Idx + NumElts))
5134 // VZIP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32.
5135 if (VT.is64BitVector() && EltSz == 32)
5141 /// isVZIP_v_undef_Mask - Special case of isVZIPMask for canonical form of
5142 /// "vector_shuffle v, v", i.e., "vector_shuffle v, undef".
5143 /// Mask is e.g., <0, 0, 1, 1> instead of <0, 4, 1, 5>.
5144 static bool isVZIP_v_undef_Mask(ArrayRef<int> M, EVT VT, unsigned &WhichResult){
5145 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
5149 unsigned NumElts = VT.getVectorNumElements();
5150 WhichResult = (M[0] == 0 ? 0 : 1);
5151 unsigned Idx = WhichResult * NumElts / 2;
5152 for (unsigned i = 0; i != NumElts; i += 2) {
5153 if ((M[i] >= 0 && (unsigned) M[i] != Idx) ||
5154 (M[i+1] >= 0 && (unsigned) M[i+1] != Idx))
5159 // VZIP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32.
5160 if (VT.is64BitVector() && EltSz == 32)
5166 /// Check if \p ShuffleMask is a NEON two-result shuffle (VZIP, VUZP, VTRN),
5167 /// and return the corresponding ARMISD opcode if it is, or 0 if it isn't.
5168 static unsigned isNEONTwoResultShuffleMask(ArrayRef<int> ShuffleMask, EVT VT,
5169 unsigned &WhichResult,
5172 if (isVTRNMask(ShuffleMask, VT, WhichResult))
5173 return ARMISD::VTRN;
5174 if (isVUZPMask(ShuffleMask, VT, WhichResult))
5175 return ARMISD::VUZP;
5176 if (isVZIPMask(ShuffleMask, VT, WhichResult))
5177 return ARMISD::VZIP;
5180 if (isVTRN_v_undef_Mask(ShuffleMask, VT, WhichResult))
5181 return ARMISD::VTRN;
5182 if (isVUZP_v_undef_Mask(ShuffleMask, VT, WhichResult))
5183 return ARMISD::VUZP;
5184 if (isVZIP_v_undef_Mask(ShuffleMask, VT, WhichResult))
5185 return ARMISD::VZIP;
5190 /// \return true if this is a reverse operation on an vector.
5191 static bool isReverseMask(ArrayRef<int> M, EVT VT) {
5192 unsigned NumElts = VT.getVectorNumElements();
5193 // Make sure the mask has the right size.
5194 if (NumElts != M.size())
5197 // Look for <15, ..., 3, -1, 1, 0>.
5198 for (unsigned i = 0; i != NumElts; ++i)
5199 if (M[i] >= 0 && M[i] != (int) (NumElts - 1 - i))
5205 // If N is an integer constant that can be moved into a register in one
5206 // instruction, return an SDValue of such a constant (will become a MOV
5207 // instruction). Otherwise return null.
5208 static SDValue IsSingleInstrConstant(SDValue N, SelectionDAG &DAG,
5209 const ARMSubtarget *ST, SDLoc dl) {
5211 if (!isa<ConstantSDNode>(N))
5213 Val = cast<ConstantSDNode>(N)->getZExtValue();
5215 if (ST->isThumb1Only()) {
5216 if (Val <= 255 || ~Val <= 255)
5217 return DAG.getConstant(Val, dl, MVT::i32);
5219 if (ARM_AM::getSOImmVal(Val) != -1 || ARM_AM::getSOImmVal(~Val) != -1)
5220 return DAG.getConstant(Val, dl, MVT::i32);
5225 // If this is a case we can't handle, return null and let the default
5226 // expansion code take care of it.
5227 SDValue ARMTargetLowering::LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG,
5228 const ARMSubtarget *ST) const {
5229 BuildVectorSDNode *BVN = cast<BuildVectorSDNode>(Op.getNode());
5231 EVT VT = Op.getValueType();
5233 APInt SplatBits, SplatUndef;
5234 unsigned SplatBitSize;
5236 if (BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize, HasAnyUndefs)) {
5237 if (SplatBitSize <= 64) {
5238 // Check if an immediate VMOV works.
5240 SDValue Val = isNEONModifiedImm(SplatBits.getZExtValue(),
5241 SplatUndef.getZExtValue(), SplatBitSize,
5242 DAG, dl, VmovVT, VT.is128BitVector(),
5244 if (Val.getNode()) {
5245 SDValue Vmov = DAG.getNode(ARMISD::VMOVIMM, dl, VmovVT, Val);
5246 return DAG.getNode(ISD::BITCAST, dl, VT, Vmov);
5249 // Try an immediate VMVN.
5250 uint64_t NegatedImm = (~SplatBits).getZExtValue();
5251 Val = isNEONModifiedImm(NegatedImm,
5252 SplatUndef.getZExtValue(), SplatBitSize,
5253 DAG, dl, VmovVT, VT.is128BitVector(),
5255 if (Val.getNode()) {
5256 SDValue Vmov = DAG.getNode(ARMISD::VMVNIMM, dl, VmovVT, Val);
5257 return DAG.getNode(ISD::BITCAST, dl, VT, Vmov);
5260 // Use vmov.f32 to materialize other v2f32 and v4f32 splats.
5261 if ((VT == MVT::v2f32 || VT == MVT::v4f32) && SplatBitSize == 32) {
5262 int ImmVal = ARM_AM::getFP32Imm(SplatBits);
5264 SDValue Val = DAG.getTargetConstant(ImmVal, dl, MVT::i32);
5265 return DAG.getNode(ARMISD::VMOVFPIMM, dl, VT, Val);
5271 // Scan through the operands to see if only one value is used.
5273 // As an optimisation, even if more than one value is used it may be more
5274 // profitable to splat with one value then change some lanes.
5276 // Heuristically we decide to do this if the vector has a "dominant" value,
5277 // defined as splatted to more than half of the lanes.
5278 unsigned NumElts = VT.getVectorNumElements();
5279 bool isOnlyLowElement = true;
5280 bool usesOnlyOneValue = true;
5281 bool hasDominantValue = false;
5282 bool isConstant = true;
5284 // Map of the number of times a particular SDValue appears in the
5286 DenseMap<SDValue, unsigned> ValueCounts;
5288 for (unsigned i = 0; i < NumElts; ++i) {
5289 SDValue V = Op.getOperand(i);
5290 if (V.getOpcode() == ISD::UNDEF)
5293 isOnlyLowElement = false;
5294 if (!isa<ConstantFPSDNode>(V) && !isa<ConstantSDNode>(V))
5297 ValueCounts.insert(std::make_pair(V, 0));
5298 unsigned &Count = ValueCounts[V];
5300 // Is this value dominant? (takes up more than half of the lanes)
5301 if (++Count > (NumElts / 2)) {
5302 hasDominantValue = true;
5306 if (ValueCounts.size() != 1)
5307 usesOnlyOneValue = false;
5308 if (!Value.getNode() && ValueCounts.size() > 0)
5309 Value = ValueCounts.begin()->first;
5311 if (ValueCounts.size() == 0)
5312 return DAG.getUNDEF(VT);
5314 // Loads are better lowered with insert_vector_elt/ARMISD::BUILD_VECTOR.
5315 // Keep going if we are hitting this case.
5316 if (isOnlyLowElement && !ISD::isNormalLoad(Value.getNode()))
5317 return DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Value);
5319 unsigned EltSize = VT.getVectorElementType().getSizeInBits();
5321 // Use VDUP for non-constant splats. For f32 constant splats, reduce to
5322 // i32 and try again.
5323 if (hasDominantValue && EltSize <= 32) {
5327 // If we are VDUPing a value that comes directly from a vector, that will
5328 // cause an unnecessary move to and from a GPR, where instead we could
5329 // just use VDUPLANE. We can only do this if the lane being extracted
5330 // is at a constant index, as the VDUP from lane instructions only have
5331 // constant-index forms.
5332 if (Value->getOpcode() == ISD::EXTRACT_VECTOR_ELT &&
5333 isa<ConstantSDNode>(Value->getOperand(1))) {
5334 // We need to create a new undef vector to use for the VDUPLANE if the
5335 // size of the vector from which we get the value is different than the
5336 // size of the vector that we need to create. We will insert the element
5337 // such that the register coalescer will remove unnecessary copies.
5338 if (VT != Value->getOperand(0).getValueType()) {
5339 ConstantSDNode *constIndex;
5340 constIndex = dyn_cast<ConstantSDNode>(Value->getOperand(1));
5341 assert(constIndex && "The index is not a constant!");
5342 unsigned index = constIndex->getAPIntValue().getLimitedValue() %
5343 VT.getVectorNumElements();
5344 N = DAG.getNode(ARMISD::VDUPLANE, dl, VT,
5345 DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, DAG.getUNDEF(VT),
5346 Value, DAG.getConstant(index, dl, MVT::i32)),
5347 DAG.getConstant(index, dl, MVT::i32));
5349 N = DAG.getNode(ARMISD::VDUPLANE, dl, VT,
5350 Value->getOperand(0), Value->getOperand(1));
5352 N = DAG.getNode(ARMISD::VDUP, dl, VT, Value);
5354 if (!usesOnlyOneValue) {
5355 // The dominant value was splatted as 'N', but we now have to insert
5356 // all differing elements.
5357 for (unsigned I = 0; I < NumElts; ++I) {
5358 if (Op.getOperand(I) == Value)
5360 SmallVector<SDValue, 3> Ops;
5362 Ops.push_back(Op.getOperand(I));
5363 Ops.push_back(DAG.getConstant(I, dl, MVT::i32));
5364 N = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, Ops);
5369 if (VT.getVectorElementType().isFloatingPoint()) {
5370 SmallVector<SDValue, 8> Ops;
5371 for (unsigned i = 0; i < NumElts; ++i)
5372 Ops.push_back(DAG.getNode(ISD::BITCAST, dl, MVT::i32,
5374 EVT VecVT = EVT::getVectorVT(*DAG.getContext(), MVT::i32, NumElts);
5375 SDValue Val = DAG.getNode(ISD::BUILD_VECTOR, dl, VecVT, Ops);
5376 Val = LowerBUILD_VECTOR(Val, DAG, ST);
5378 return DAG.getNode(ISD::BITCAST, dl, VT, Val);
5380 if (usesOnlyOneValue) {
5381 SDValue Val = IsSingleInstrConstant(Value, DAG, ST, dl);
5382 if (isConstant && Val.getNode())
5383 return DAG.getNode(ARMISD::VDUP, dl, VT, Val);
5387 // If all elements are constants and the case above didn't get hit, fall back
5388 // to the default expansion, which will generate a load from the constant
5393 // Empirical tests suggest this is rarely worth it for vectors of length <= 2.
5395 SDValue shuffle = ReconstructShuffle(Op, DAG);
5396 if (shuffle != SDValue())
5400 // Vectors with 32- or 64-bit elements can be built by directly assigning
5401 // the subregisters. Lower it to an ARMISD::BUILD_VECTOR so the operands
5402 // will be legalized.
5403 if (EltSize >= 32) {
5404 // Do the expansion with floating-point types, since that is what the VFP
5405 // registers are defined to use, and since i64 is not legal.
5406 EVT EltVT = EVT::getFloatingPointVT(EltSize);
5407 EVT VecVT = EVT::getVectorVT(*DAG.getContext(), EltVT, NumElts);
5408 SmallVector<SDValue, 8> Ops;
5409 for (unsigned i = 0; i < NumElts; ++i)
5410 Ops.push_back(DAG.getNode(ISD::BITCAST, dl, EltVT, Op.getOperand(i)));
5411 SDValue Val = DAG.getNode(ARMISD::BUILD_VECTOR, dl, VecVT, Ops);
5412 return DAG.getNode(ISD::BITCAST, dl, VT, Val);
5415 // If all else fails, just use a sequence of INSERT_VECTOR_ELT when we
5416 // know the default expansion would otherwise fall back on something even
5417 // worse. For a vector with one or two non-undef values, that's
5418 // scalar_to_vector for the elements followed by a shuffle (provided the
5419 // shuffle is valid for the target) and materialization element by element
5420 // on the stack followed by a load for everything else.
5421 if (!isConstant && !usesOnlyOneValue) {
5422 SDValue Vec = DAG.getUNDEF(VT);
5423 for (unsigned i = 0 ; i < NumElts; ++i) {
5424 SDValue V = Op.getOperand(i);
5425 if (V.getOpcode() == ISD::UNDEF)
5427 SDValue LaneIdx = DAG.getConstant(i, dl, MVT::i32);
5428 Vec = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, Vec, V, LaneIdx);
5436 // Gather data to see if the operation can be modelled as a
5437 // shuffle in combination with VEXTs.
5438 SDValue ARMTargetLowering::ReconstructShuffle(SDValue Op,
5439 SelectionDAG &DAG) const {
5441 EVT VT = Op.getValueType();
5442 unsigned NumElts = VT.getVectorNumElements();
5444 SmallVector<SDValue, 2> SourceVecs;
5445 SmallVector<unsigned, 2> MinElts;
5446 SmallVector<unsigned, 2> MaxElts;
5448 for (unsigned i = 0; i < NumElts; ++i) {
5449 SDValue V = Op.getOperand(i);
5450 if (V.getOpcode() == ISD::UNDEF)
5452 else if (V.getOpcode() != ISD::EXTRACT_VECTOR_ELT) {
5453 // A shuffle can only come from building a vector from various
5454 // elements of other vectors.
5456 } else if (V.getOperand(0).getValueType().getVectorElementType() !=
5457 VT.getVectorElementType()) {
5458 // This code doesn't know how to handle shuffles where the vector
5459 // element types do not match (this happens because type legalization
5460 // promotes the return type of EXTRACT_VECTOR_ELT).
5461 // FIXME: It might be appropriate to extend this code to handle
5462 // mismatched types.
5466 // Record this extraction against the appropriate vector if possible...
5467 SDValue SourceVec = V.getOperand(0);
5468 // If the element number isn't a constant, we can't effectively
5469 // analyze what's going on.
5470 if (!isa<ConstantSDNode>(V.getOperand(1)))
5472 unsigned EltNo = cast<ConstantSDNode>(V.getOperand(1))->getZExtValue();
5473 bool FoundSource = false;
5474 for (unsigned j = 0; j < SourceVecs.size(); ++j) {
5475 if (SourceVecs[j] == SourceVec) {
5476 if (MinElts[j] > EltNo)
5478 if (MaxElts[j] < EltNo)
5485 // Or record a new source if not...
5487 SourceVecs.push_back(SourceVec);
5488 MinElts.push_back(EltNo);
5489 MaxElts.push_back(EltNo);
5493 // Currently only do something sane when at most two source vectors
5495 if (SourceVecs.size() > 2)
5498 SDValue ShuffleSrcs[2] = {DAG.getUNDEF(VT), DAG.getUNDEF(VT) };
5499 int VEXTOffsets[2] = {0, 0};
5501 // This loop extracts the usage patterns of the source vectors
5502 // and prepares appropriate SDValues for a shuffle if possible.
5503 for (unsigned i = 0; i < SourceVecs.size(); ++i) {
5504 if (SourceVecs[i].getValueType() == VT) {
5505 // No VEXT necessary
5506 ShuffleSrcs[i] = SourceVecs[i];
5509 } else if (SourceVecs[i].getValueType().getVectorNumElements() < NumElts) {
5510 // It probably isn't worth padding out a smaller vector just to
5511 // break it down again in a shuffle.
5515 // Since only 64-bit and 128-bit vectors are legal on ARM and
5516 // we've eliminated the other cases...
5517 assert(SourceVecs[i].getValueType().getVectorNumElements() == 2*NumElts &&
5518 "unexpected vector sizes in ReconstructShuffle");
5520 if (MaxElts[i] - MinElts[i] >= NumElts) {
5521 // Span too large for a VEXT to cope
5525 if (MinElts[i] >= NumElts) {
5526 // The extraction can just take the second half
5527 VEXTOffsets[i] = NumElts;
5528 ShuffleSrcs[i] = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT,
5530 DAG.getIntPtrConstant(NumElts, dl));
5531 } else if (MaxElts[i] < NumElts) {
5532 // The extraction can just take the first half
5534 ShuffleSrcs[i] = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT,
5536 DAG.getIntPtrConstant(0, dl));
5538 // An actual VEXT is needed
5539 VEXTOffsets[i] = MinElts[i];
5540 SDValue VEXTSrc1 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT,
5542 DAG.getIntPtrConstant(0, dl));
5543 SDValue VEXTSrc2 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT,
5545 DAG.getIntPtrConstant(NumElts, dl));
5546 ShuffleSrcs[i] = DAG.getNode(ARMISD::VEXT, dl, VT, VEXTSrc1, VEXTSrc2,
5547 DAG.getConstant(VEXTOffsets[i], dl,
5552 SmallVector<int, 8> Mask;
5554 for (unsigned i = 0; i < NumElts; ++i) {
5555 SDValue Entry = Op.getOperand(i);
5556 if (Entry.getOpcode() == ISD::UNDEF) {
5561 SDValue ExtractVec = Entry.getOperand(0);
5562 int ExtractElt = cast<ConstantSDNode>(Op.getOperand(i)
5563 .getOperand(1))->getSExtValue();
5564 if (ExtractVec == SourceVecs[0]) {
5565 Mask.push_back(ExtractElt - VEXTOffsets[0]);
5567 Mask.push_back(ExtractElt + NumElts - VEXTOffsets[1]);
5571 // Final check before we try to produce nonsense...
5572 if (isShuffleMaskLegal(Mask, VT))
5573 return DAG.getVectorShuffle(VT, dl, ShuffleSrcs[0], ShuffleSrcs[1],
5579 /// isShuffleMaskLegal - Targets can use this to indicate that they only
5580 /// support *some* VECTOR_SHUFFLE operations, those with specific masks.
5581 /// By default, if a target supports the VECTOR_SHUFFLE node, all mask values
5582 /// are assumed to be legal.
5584 ARMTargetLowering::isShuffleMaskLegal(const SmallVectorImpl<int> &M,
5586 if (VT.getVectorNumElements() == 4 &&
5587 (VT.is128BitVector() || VT.is64BitVector())) {
5588 unsigned PFIndexes[4];
5589 for (unsigned i = 0; i != 4; ++i) {
5593 PFIndexes[i] = M[i];
5596 // Compute the index in the perfect shuffle table.
5597 unsigned PFTableIndex =
5598 PFIndexes[0]*9*9*9+PFIndexes[1]*9*9+PFIndexes[2]*9+PFIndexes[3];
5599 unsigned PFEntry = PerfectShuffleTable[PFTableIndex];
5600 unsigned Cost = (PFEntry >> 30);
5606 bool ReverseVEXT, isV_UNDEF;
5607 unsigned Imm, WhichResult;
5609 unsigned EltSize = VT.getVectorElementType().getSizeInBits();
5610 return (EltSize >= 32 ||
5611 ShuffleVectorSDNode::isSplatMask(&M[0], VT) ||
5612 isVREVMask(M, VT, 64) ||
5613 isVREVMask(M, VT, 32) ||
5614 isVREVMask(M, VT, 16) ||
5615 isVEXTMask(M, VT, ReverseVEXT, Imm) ||
5616 isVTBLMask(M, VT) ||
5617 isNEONTwoResultShuffleMask(M, VT, WhichResult, isV_UNDEF) ||
5618 ((VT == MVT::v8i16 || VT == MVT::v16i8) && isReverseMask(M, VT)));
5621 /// GeneratePerfectShuffle - Given an entry in the perfect-shuffle table, emit
5622 /// the specified operations to build the shuffle.
5623 static SDValue GeneratePerfectShuffle(unsigned PFEntry, SDValue LHS,
5624 SDValue RHS, SelectionDAG &DAG,
5626 unsigned OpNum = (PFEntry >> 26) & 0x0F;
5627 unsigned LHSID = (PFEntry >> 13) & ((1 << 13)-1);
5628 unsigned RHSID = (PFEntry >> 0) & ((1 << 13)-1);
5631 OP_COPY = 0, // Copy, used for things like <u,u,u,3> to say it is <0,1,2,3>
5640 OP_VUZPL, // VUZP, left result
5641 OP_VUZPR, // VUZP, right result
5642 OP_VZIPL, // VZIP, left result
5643 OP_VZIPR, // VZIP, right result
5644 OP_VTRNL, // VTRN, left result
5645 OP_VTRNR // VTRN, right result
5648 if (OpNum == OP_COPY) {
5649 if (LHSID == (1*9+2)*9+3) return LHS;
5650 assert(LHSID == ((4*9+5)*9+6)*9+7 && "Illegal OP_COPY!");
5654 SDValue OpLHS, OpRHS;
5655 OpLHS = GeneratePerfectShuffle(PerfectShuffleTable[LHSID], LHS, RHS, DAG, dl);
5656 OpRHS = GeneratePerfectShuffle(PerfectShuffleTable[RHSID], LHS, RHS, DAG, dl);
5657 EVT VT = OpLHS.getValueType();
5660 default: llvm_unreachable("Unknown shuffle opcode!");
5662 // VREV divides the vector in half and swaps within the half.
5663 if (VT.getVectorElementType() == MVT::i32 ||
5664 VT.getVectorElementType() == MVT::f32)
5665 return DAG.getNode(ARMISD::VREV64, dl, VT, OpLHS);
5666 // vrev <4 x i16> -> VREV32
5667 if (VT.getVectorElementType() == MVT::i16)
5668 return DAG.getNode(ARMISD::VREV32, dl, VT, OpLHS);
5669 // vrev <4 x i8> -> VREV16
5670 assert(VT.getVectorElementType() == MVT::i8);
5671 return DAG.getNode(ARMISD::VREV16, dl, VT, OpLHS);
5676 return DAG.getNode(ARMISD::VDUPLANE, dl, VT,
5677 OpLHS, DAG.getConstant(OpNum-OP_VDUP0, dl, MVT::i32));
5681 return DAG.getNode(ARMISD::VEXT, dl, VT,
5683 DAG.getConstant(OpNum - OP_VEXT1 + 1, dl, MVT::i32));
5686 return DAG.getNode(ARMISD::VUZP, dl, DAG.getVTList(VT, VT),
5687 OpLHS, OpRHS).getValue(OpNum-OP_VUZPL);
5690 return DAG.getNode(ARMISD::VZIP, dl, DAG.getVTList(VT, VT),
5691 OpLHS, OpRHS).getValue(OpNum-OP_VZIPL);
5694 return DAG.getNode(ARMISD::VTRN, dl, DAG.getVTList(VT, VT),
5695 OpLHS, OpRHS).getValue(OpNum-OP_VTRNL);
5699 static SDValue LowerVECTOR_SHUFFLEv8i8(SDValue Op,
5700 ArrayRef<int> ShuffleMask,
5701 SelectionDAG &DAG) {
5702 // Check to see if we can use the VTBL instruction.
5703 SDValue V1 = Op.getOperand(0);
5704 SDValue V2 = Op.getOperand(1);
5707 SmallVector<SDValue, 8> VTBLMask;
5708 for (ArrayRef<int>::iterator
5709 I = ShuffleMask.begin(), E = ShuffleMask.end(); I != E; ++I)
5710 VTBLMask.push_back(DAG.getConstant(*I, DL, MVT::i32));
5712 if (V2.getNode()->getOpcode() == ISD::UNDEF)
5713 return DAG.getNode(ARMISD::VTBL1, DL, MVT::v8i8, V1,
5714 DAG.getNode(ISD::BUILD_VECTOR, DL, MVT::v8i8, VTBLMask));
5716 return DAG.getNode(ARMISD::VTBL2, DL, MVT::v8i8, V1, V2,
5717 DAG.getNode(ISD::BUILD_VECTOR, DL, MVT::v8i8, VTBLMask));
5720 static SDValue LowerReverse_VECTOR_SHUFFLEv16i8_v8i16(SDValue Op,
5721 SelectionDAG &DAG) {
5723 SDValue OpLHS = Op.getOperand(0);
5724 EVT VT = OpLHS.getValueType();
5726 assert((VT == MVT::v8i16 || VT == MVT::v16i8) &&
5727 "Expect an v8i16/v16i8 type");
5728 OpLHS = DAG.getNode(ARMISD::VREV64, DL, VT, OpLHS);
5729 // For a v16i8 type: After the VREV, we have got <8, ...15, 8, ..., 0>. Now,
5730 // extract the first 8 bytes into the top double word and the last 8 bytes
5731 // into the bottom double word. The v8i16 case is similar.
5732 unsigned ExtractNum = (VT == MVT::v16i8) ? 8 : 4;
5733 return DAG.getNode(ARMISD::VEXT, DL, VT, OpLHS, OpLHS,
5734 DAG.getConstant(ExtractNum, DL, MVT::i32));
5737 static SDValue LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) {
5738 SDValue V1 = Op.getOperand(0);
5739 SDValue V2 = Op.getOperand(1);
5741 EVT VT = Op.getValueType();
5742 ShuffleVectorSDNode *SVN = cast<ShuffleVectorSDNode>(Op.getNode());
5744 // Convert shuffles that are directly supported on NEON to target-specific
5745 // DAG nodes, instead of keeping them as shuffles and matching them again
5746 // during code selection. This is more efficient and avoids the possibility
5747 // of inconsistencies between legalization and selection.
5748 // FIXME: floating-point vectors should be canonicalized to integer vectors
5749 // of the same time so that they get CSEd properly.
5750 ArrayRef<int> ShuffleMask = SVN->getMask();
5752 unsigned EltSize = VT.getVectorElementType().getSizeInBits();
5753 if (EltSize <= 32) {
5754 if (ShuffleVectorSDNode::isSplatMask(&ShuffleMask[0], VT)) {
5755 int Lane = SVN->getSplatIndex();
5756 // If this is undef splat, generate it via "just" vdup, if possible.
5757 if (Lane == -1) Lane = 0;
5759 // Test if V1 is a SCALAR_TO_VECTOR.
5760 if (Lane == 0 && V1.getOpcode() == ISD::SCALAR_TO_VECTOR) {
5761 return DAG.getNode(ARMISD::VDUP, dl, VT, V1.getOperand(0));
5763 // Test if V1 is a BUILD_VECTOR which is equivalent to a SCALAR_TO_VECTOR
5764 // (and probably will turn into a SCALAR_TO_VECTOR once legalization
5766 if (Lane == 0 && V1.getOpcode() == ISD::BUILD_VECTOR &&
5767 !isa<ConstantSDNode>(V1.getOperand(0))) {
5768 bool IsScalarToVector = true;
5769 for (unsigned i = 1, e = V1.getNumOperands(); i != e; ++i)
5770 if (V1.getOperand(i).getOpcode() != ISD::UNDEF) {
5771 IsScalarToVector = false;
5774 if (IsScalarToVector)
5775 return DAG.getNode(ARMISD::VDUP, dl, VT, V1.getOperand(0));
5777 return DAG.getNode(ARMISD::VDUPLANE, dl, VT, V1,
5778 DAG.getConstant(Lane, dl, MVT::i32));
5783 if (isVEXTMask(ShuffleMask, VT, ReverseVEXT, Imm)) {
5786 return DAG.getNode(ARMISD::VEXT, dl, VT, V1, V2,
5787 DAG.getConstant(Imm, dl, MVT::i32));
5790 if (isVREVMask(ShuffleMask, VT, 64))
5791 return DAG.getNode(ARMISD::VREV64, dl, VT, V1);
5792 if (isVREVMask(ShuffleMask, VT, 32))
5793 return DAG.getNode(ARMISD::VREV32, dl, VT, V1);
5794 if (isVREVMask(ShuffleMask, VT, 16))
5795 return DAG.getNode(ARMISD::VREV16, dl, VT, V1);
5797 if (V2->getOpcode() == ISD::UNDEF &&
5798 isSingletonVEXTMask(ShuffleMask, VT, Imm)) {
5799 return DAG.getNode(ARMISD::VEXT, dl, VT, V1, V1,
5800 DAG.getConstant(Imm, dl, MVT::i32));
5803 // Check for Neon shuffles that modify both input vectors in place.
5804 // If both results are used, i.e., if there are two shuffles with the same
5805 // source operands and with masks corresponding to both results of one of
5806 // these operations, DAG memoization will ensure that a single node is
5807 // used for both shuffles.
5808 unsigned WhichResult;
5810 if (unsigned ShuffleOpc = isNEONTwoResultShuffleMask(
5811 ShuffleMask, VT, WhichResult, isV_UNDEF)) {
5814 return DAG.getNode(ShuffleOpc, dl, DAG.getVTList(VT, VT), V1, V2)
5815 .getValue(WhichResult);
5818 // Also check for these shuffles through CONCAT_VECTORS: we canonicalize
5819 // shuffles that produce a result larger than their operands with:
5820 // shuffle(concat(v1, undef), concat(v2, undef))
5822 // shuffle(concat(v1, v2), undef)
5823 // because we can access quad vectors (see PerformVECTOR_SHUFFLECombine).
5825 // This is useful in the general case, but there are special cases where
5826 // native shuffles produce larger results: the two-result ops.
5828 // Look through the concat when lowering them:
5829 // shuffle(concat(v1, v2), undef)
5831 // concat(VZIP(v1, v2):0, :1)
5833 if (V1->getOpcode() == ISD::CONCAT_VECTORS &&
5834 V2->getOpcode() == ISD::UNDEF) {
5835 SDValue SubV1 = V1->getOperand(0);
5836 SDValue SubV2 = V1->getOperand(1);
5837 EVT SubVT = SubV1.getValueType();
5839 // We expect these to have been canonicalized to -1.
5840 assert(std::all_of(ShuffleMask.begin(), ShuffleMask.end(), [&](int i) {
5841 return i < (int)VT.getVectorNumElements();
5842 }) && "Unexpected shuffle index into UNDEF operand!");
5844 if (unsigned ShuffleOpc = isNEONTwoResultShuffleMask(
5845 ShuffleMask, SubVT, WhichResult, isV_UNDEF)) {
5848 assert((WhichResult == 0) &&
5849 "In-place shuffle of concat can only have one result!");
5850 SDValue Res = DAG.getNode(ShuffleOpc, dl, DAG.getVTList(SubVT, SubVT),
5852 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, Res.getValue(0),
5858 // If the shuffle is not directly supported and it has 4 elements, use
5859 // the PerfectShuffle-generated table to synthesize it from other shuffles.
5860 unsigned NumElts = VT.getVectorNumElements();
5862 unsigned PFIndexes[4];
5863 for (unsigned i = 0; i != 4; ++i) {
5864 if (ShuffleMask[i] < 0)
5867 PFIndexes[i] = ShuffleMask[i];
5870 // Compute the index in the perfect shuffle table.
5871 unsigned PFTableIndex =
5872 PFIndexes[0]*9*9*9+PFIndexes[1]*9*9+PFIndexes[2]*9+PFIndexes[3];
5873 unsigned PFEntry = PerfectShuffleTable[PFTableIndex];
5874 unsigned Cost = (PFEntry >> 30);
5877 return GeneratePerfectShuffle(PFEntry, V1, V2, DAG, dl);
5880 // Implement shuffles with 32- or 64-bit elements as ARMISD::BUILD_VECTORs.
5881 if (EltSize >= 32) {
5882 // Do the expansion with floating-point types, since that is what the VFP
5883 // registers are defined to use, and since i64 is not legal.
5884 EVT EltVT = EVT::getFloatingPointVT(EltSize);
5885 EVT VecVT = EVT::getVectorVT(*DAG.getContext(), EltVT, NumElts);
5886 V1 = DAG.getNode(ISD::BITCAST, dl, VecVT, V1);
5887 V2 = DAG.getNode(ISD::BITCAST, dl, VecVT, V2);
5888 SmallVector<SDValue, 8> Ops;
5889 for (unsigned i = 0; i < NumElts; ++i) {
5890 if (ShuffleMask[i] < 0)
5891 Ops.push_back(DAG.getUNDEF(EltVT));
5893 Ops.push_back(DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, EltVT,
5894 ShuffleMask[i] < (int)NumElts ? V1 : V2,
5895 DAG.getConstant(ShuffleMask[i] & (NumElts-1),
5898 SDValue Val = DAG.getNode(ARMISD::BUILD_VECTOR, dl, VecVT, Ops);
5899 return DAG.getNode(ISD::BITCAST, dl, VT, Val);
5902 if ((VT == MVT::v8i16 || VT == MVT::v16i8) && isReverseMask(ShuffleMask, VT))
5903 return LowerReverse_VECTOR_SHUFFLEv16i8_v8i16(Op, DAG);
5905 if (VT == MVT::v8i8) {
5906 SDValue NewOp = LowerVECTOR_SHUFFLEv8i8(Op, ShuffleMask, DAG);
5907 if (NewOp.getNode())
5914 static SDValue LowerINSERT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) {
5915 // INSERT_VECTOR_ELT is legal only for immediate indexes.
5916 SDValue Lane = Op.getOperand(2);
5917 if (!isa<ConstantSDNode>(Lane))
5923 static SDValue LowerEXTRACT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) {
5924 // EXTRACT_VECTOR_ELT is legal only for immediate indexes.
5925 SDValue Lane = Op.getOperand(1);
5926 if (!isa<ConstantSDNode>(Lane))
5929 SDValue Vec = Op.getOperand(0);
5930 if (Op.getValueType() == MVT::i32 &&
5931 Vec.getValueType().getVectorElementType().getSizeInBits() < 32) {
5933 return DAG.getNode(ARMISD::VGETLANEu, dl, MVT::i32, Vec, Lane);
5939 static SDValue LowerCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) {
5940 // The only time a CONCAT_VECTORS operation can have legal types is when
5941 // two 64-bit vectors are concatenated to a 128-bit vector.
5942 assert(Op.getValueType().is128BitVector() && Op.getNumOperands() == 2 &&
5943 "unexpected CONCAT_VECTORS");
5945 SDValue Val = DAG.getUNDEF(MVT::v2f64);
5946 SDValue Op0 = Op.getOperand(0);
5947 SDValue Op1 = Op.getOperand(1);
5948 if (Op0.getOpcode() != ISD::UNDEF)
5949 Val = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Val,
5950 DAG.getNode(ISD::BITCAST, dl, MVT::f64, Op0),
5951 DAG.getIntPtrConstant(0, dl));
5952 if (Op1.getOpcode() != ISD::UNDEF)
5953 Val = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Val,
5954 DAG.getNode(ISD::BITCAST, dl, MVT::f64, Op1),
5955 DAG.getIntPtrConstant(1, dl));
5956 return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), Val);
5959 /// isExtendedBUILD_VECTOR - Check if N is a constant BUILD_VECTOR where each
5960 /// element has been zero/sign-extended, depending on the isSigned parameter,
5961 /// from an integer type half its size.
5962 static bool isExtendedBUILD_VECTOR(SDNode *N, SelectionDAG &DAG,
5964 // A v2i64 BUILD_VECTOR will have been legalized to a BITCAST from v4i32.
5965 EVT VT = N->getValueType(0);
5966 if (VT == MVT::v2i64 && N->getOpcode() == ISD::BITCAST) {
5967 SDNode *BVN = N->getOperand(0).getNode();
5968 if (BVN->getValueType(0) != MVT::v4i32 ||
5969 BVN->getOpcode() != ISD::BUILD_VECTOR)
5971 unsigned LoElt = DAG.getDataLayout().isBigEndian() ? 1 : 0;
5972 unsigned HiElt = 1 - LoElt;
5973 ConstantSDNode *Lo0 = dyn_cast<ConstantSDNode>(BVN->getOperand(LoElt));
5974 ConstantSDNode *Hi0 = dyn_cast<ConstantSDNode>(BVN->getOperand(HiElt));
5975 ConstantSDNode *Lo1 = dyn_cast<ConstantSDNode>(BVN->getOperand(LoElt+2));
5976 ConstantSDNode *Hi1 = dyn_cast<ConstantSDNode>(BVN->getOperand(HiElt+2));
5977 if (!Lo0 || !Hi0 || !Lo1 || !Hi1)
5980 if (Hi0->getSExtValue() == Lo0->getSExtValue() >> 32 &&
5981 Hi1->getSExtValue() == Lo1->getSExtValue() >> 32)
5984 if (Hi0->isNullValue() && Hi1->isNullValue())
5990 if (N->getOpcode() != ISD::BUILD_VECTOR)
5993 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
5994 SDNode *Elt = N->getOperand(i).getNode();
5995 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Elt)) {
5996 unsigned EltSize = VT.getVectorElementType().getSizeInBits();
5997 unsigned HalfSize = EltSize / 2;
5999 if (!isIntN(HalfSize, C->getSExtValue()))
6002 if (!isUIntN(HalfSize, C->getZExtValue()))
6013 /// isSignExtended - Check if a node is a vector value that is sign-extended
6014 /// or a constant BUILD_VECTOR with sign-extended elements.
6015 static bool isSignExtended(SDNode *N, SelectionDAG &DAG) {
6016 if (N->getOpcode() == ISD::SIGN_EXTEND || ISD::isSEXTLoad(N))
6018 if (isExtendedBUILD_VECTOR(N, DAG, true))
6023 /// isZeroExtended - Check if a node is a vector value that is zero-extended
6024 /// or a constant BUILD_VECTOR with zero-extended elements.
6025 static bool isZeroExtended(SDNode *N, SelectionDAG &DAG) {
6026 if (N->getOpcode() == ISD::ZERO_EXTEND || ISD::isZEXTLoad(N))
6028 if (isExtendedBUILD_VECTOR(N, DAG, false))
6033 static EVT getExtensionTo64Bits(const EVT &OrigVT) {
6034 if (OrigVT.getSizeInBits() >= 64)
6037 assert(OrigVT.isSimple() && "Expecting a simple value type");
6039 MVT::SimpleValueType OrigSimpleTy = OrigVT.getSimpleVT().SimpleTy;
6040 switch (OrigSimpleTy) {
6041 default: llvm_unreachable("Unexpected Vector Type");
6050 /// AddRequiredExtensionForVMULL - Add a sign/zero extension to extend the total
6051 /// value size to 64 bits. We need a 64-bit D register as an operand to VMULL.
6052 /// We insert the required extension here to get the vector to fill a D register.
6053 static SDValue AddRequiredExtensionForVMULL(SDValue N, SelectionDAG &DAG,
6056 unsigned ExtOpcode) {
6057 // The vector originally had a size of OrigTy. It was then extended to ExtTy.
6058 // We expect the ExtTy to be 128-bits total. If the OrigTy is less than
6059 // 64-bits we need to insert a new extension so that it will be 64-bits.
6060 assert(ExtTy.is128BitVector() && "Unexpected extension size");
6061 if (OrigTy.getSizeInBits() >= 64)
6064 // Must extend size to at least 64 bits to be used as an operand for VMULL.
6065 EVT NewVT = getExtensionTo64Bits(OrigTy);
6067 return DAG.getNode(ExtOpcode, SDLoc(N), NewVT, N);
6070 /// SkipLoadExtensionForVMULL - return a load of the original vector size that
6071 /// does not do any sign/zero extension. If the original vector is less
6072 /// than 64 bits, an appropriate extension will be added after the load to
6073 /// reach a total size of 64 bits. We have to add the extension separately
6074 /// because ARM does not have a sign/zero extending load for vectors.
6075 static SDValue SkipLoadExtensionForVMULL(LoadSDNode *LD, SelectionDAG& DAG) {
6076 EVT ExtendedTy = getExtensionTo64Bits(LD->getMemoryVT());
6078 // The load already has the right type.
6079 if (ExtendedTy == LD->getMemoryVT())
6080 return DAG.getLoad(LD->getMemoryVT(), SDLoc(LD), LD->getChain(),
6081 LD->getBasePtr(), LD->getPointerInfo(), LD->isVolatile(),
6082 LD->isNonTemporal(), LD->isInvariant(),
6083 LD->getAlignment());
6085 // We need to create a zextload/sextload. We cannot just create a load
6086 // followed by a zext/zext node because LowerMUL is also run during normal
6087 // operation legalization where we can't create illegal types.
6088 return DAG.getExtLoad(LD->getExtensionType(), SDLoc(LD), ExtendedTy,
6089 LD->getChain(), LD->getBasePtr(), LD->getPointerInfo(),
6090 LD->getMemoryVT(), LD->isVolatile(), LD->isInvariant(),
6091 LD->isNonTemporal(), LD->getAlignment());
6094 /// SkipExtensionForVMULL - For a node that is a SIGN_EXTEND, ZERO_EXTEND,
6095 /// extending load, or BUILD_VECTOR with extended elements, return the
6096 /// unextended value. The unextended vector should be 64 bits so that it can
6097 /// be used as an operand to a VMULL instruction. If the original vector size
6098 /// before extension is less than 64 bits we add a an extension to resize
6099 /// the vector to 64 bits.
6100 static SDValue SkipExtensionForVMULL(SDNode *N, SelectionDAG &DAG) {
6101 if (N->getOpcode() == ISD::SIGN_EXTEND || N->getOpcode() == ISD::ZERO_EXTEND)
6102 return AddRequiredExtensionForVMULL(N->getOperand(0), DAG,
6103 N->getOperand(0)->getValueType(0),
6107 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N))
6108 return SkipLoadExtensionForVMULL(LD, DAG);
6110 // Otherwise, the value must be a BUILD_VECTOR. For v2i64, it will
6111 // have been legalized as a BITCAST from v4i32.
6112 if (N->getOpcode() == ISD::BITCAST) {
6113 SDNode *BVN = N->getOperand(0).getNode();
6114 assert(BVN->getOpcode() == ISD::BUILD_VECTOR &&
6115 BVN->getValueType(0) == MVT::v4i32 && "expected v4i32 BUILD_VECTOR");
6116 unsigned LowElt = DAG.getDataLayout().isBigEndian() ? 1 : 0;
6117 return DAG.getNode(ISD::BUILD_VECTOR, SDLoc(N), MVT::v2i32,
6118 BVN->getOperand(LowElt), BVN->getOperand(LowElt+2));
6120 // Construct a new BUILD_VECTOR with elements truncated to half the size.
6121 assert(N->getOpcode() == ISD::BUILD_VECTOR && "expected BUILD_VECTOR");
6122 EVT VT = N->getValueType(0);
6123 unsigned EltSize = VT.getVectorElementType().getSizeInBits() / 2;
6124 unsigned NumElts = VT.getVectorNumElements();
6125 MVT TruncVT = MVT::getIntegerVT(EltSize);
6126 SmallVector<SDValue, 8> Ops;
6128 for (unsigned i = 0; i != NumElts; ++i) {
6129 ConstantSDNode *C = cast<ConstantSDNode>(N->getOperand(i));
6130 const APInt &CInt = C->getAPIntValue();
6131 // Element types smaller than 32 bits are not legal, so use i32 elements.
6132 // The values are implicitly truncated so sext vs. zext doesn't matter.
6133 Ops.push_back(DAG.getConstant(CInt.zextOrTrunc(32), dl, MVT::i32));
6135 return DAG.getNode(ISD::BUILD_VECTOR, dl,
6136 MVT::getVectorVT(TruncVT, NumElts), Ops);
6139 static bool isAddSubSExt(SDNode *N, SelectionDAG &DAG) {
6140 unsigned Opcode = N->getOpcode();
6141 if (Opcode == ISD::ADD || Opcode == ISD::SUB) {
6142 SDNode *N0 = N->getOperand(0).getNode();
6143 SDNode *N1 = N->getOperand(1).getNode();
6144 return N0->hasOneUse() && N1->hasOneUse() &&
6145 isSignExtended(N0, DAG) && isSignExtended(N1, DAG);
6150 static bool isAddSubZExt(SDNode *N, SelectionDAG &DAG) {
6151 unsigned Opcode = N->getOpcode();
6152 if (Opcode == ISD::ADD || Opcode == ISD::SUB) {
6153 SDNode *N0 = N->getOperand(0).getNode();
6154 SDNode *N1 = N->getOperand(1).getNode();
6155 return N0->hasOneUse() && N1->hasOneUse() &&
6156 isZeroExtended(N0, DAG) && isZeroExtended(N1, DAG);
6161 static SDValue LowerMUL(SDValue Op, SelectionDAG &DAG) {
6162 // Multiplications are only custom-lowered for 128-bit vectors so that
6163 // VMULL can be detected. Otherwise v2i64 multiplications are not legal.
6164 EVT VT = Op.getValueType();
6165 assert(VT.is128BitVector() && VT.isInteger() &&
6166 "unexpected type for custom-lowering ISD::MUL");
6167 SDNode *N0 = Op.getOperand(0).getNode();
6168 SDNode *N1 = Op.getOperand(1).getNode();
6169 unsigned NewOpc = 0;
6171 bool isN0SExt = isSignExtended(N0, DAG);
6172 bool isN1SExt = isSignExtended(N1, DAG);
6173 if (isN0SExt && isN1SExt)
6174 NewOpc = ARMISD::VMULLs;
6176 bool isN0ZExt = isZeroExtended(N0, DAG);
6177 bool isN1ZExt = isZeroExtended(N1, DAG);
6178 if (isN0ZExt && isN1ZExt)
6179 NewOpc = ARMISD::VMULLu;
6180 else if (isN1SExt || isN1ZExt) {
6181 // Look for (s/zext A + s/zext B) * (s/zext C). We want to turn these
6182 // into (s/zext A * s/zext C) + (s/zext B * s/zext C)
6183 if (isN1SExt && isAddSubSExt(N0, DAG)) {
6184 NewOpc = ARMISD::VMULLs;
6186 } else if (isN1ZExt && isAddSubZExt(N0, DAG)) {
6187 NewOpc = ARMISD::VMULLu;
6189 } else if (isN0ZExt && isAddSubZExt(N1, DAG)) {
6191 NewOpc = ARMISD::VMULLu;
6197 if (VT == MVT::v2i64)
6198 // Fall through to expand this. It is not legal.
6201 // Other vector multiplications are legal.
6206 // Legalize to a VMULL instruction.
6209 SDValue Op1 = SkipExtensionForVMULL(N1, DAG);
6211 Op0 = SkipExtensionForVMULL(N0, DAG);
6212 assert(Op0.getValueType().is64BitVector() &&
6213 Op1.getValueType().is64BitVector() &&
6214 "unexpected types for extended operands to VMULL");
6215 return DAG.getNode(NewOpc, DL, VT, Op0, Op1);
6218 // Optimizing (zext A + zext B) * C, to (VMULL A, C) + (VMULL B, C) during
6219 // isel lowering to take advantage of no-stall back to back vmul + vmla.
6226 SDValue N00 = SkipExtensionForVMULL(N0->getOperand(0).getNode(), DAG);
6227 SDValue N01 = SkipExtensionForVMULL(N0->getOperand(1).getNode(), DAG);
6228 EVT Op1VT = Op1.getValueType();
6229 return DAG.getNode(N0->getOpcode(), DL, VT,
6230 DAG.getNode(NewOpc, DL, VT,
6231 DAG.getNode(ISD::BITCAST, DL, Op1VT, N00), Op1),
6232 DAG.getNode(NewOpc, DL, VT,
6233 DAG.getNode(ISD::BITCAST, DL, Op1VT, N01), Op1));
6237 LowerSDIV_v4i8(SDValue X, SDValue Y, SDLoc dl, SelectionDAG &DAG) {
6239 // float4 xf = vcvt_f32_s32(vmovl_s16(a.lo));
6240 // float4 yf = vcvt_f32_s32(vmovl_s16(b.lo));
6241 X = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v4i32, X);
6242 Y = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v4i32, Y);
6243 X = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, X);
6244 Y = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, Y);
6245 // Get reciprocal estimate.
6246 // float4 recip = vrecpeq_f32(yf);
6247 Y = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
6248 DAG.getConstant(Intrinsic::arm_neon_vrecpe, dl, MVT::i32),
6250 // Because char has a smaller range than uchar, we can actually get away
6251 // without any newton steps. This requires that we use a weird bias
6252 // of 0xb000, however (again, this has been exhaustively tested).
6253 // float4 result = as_float4(as_int4(xf*recip) + 0xb000);
6254 X = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, X, Y);
6255 X = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, X);
6256 Y = DAG.getConstant(0xb000, dl, MVT::i32);
6257 Y = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, Y, Y, Y, Y);
6258 X = DAG.getNode(ISD::ADD, dl, MVT::v4i32, X, Y);
6259 X = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, X);
6260 // Convert back to short.
6261 X = DAG.getNode(ISD::FP_TO_SINT, dl, MVT::v4i32, X);
6262 X = DAG.getNode(ISD::TRUNCATE, dl, MVT::v4i16, X);
6267 LowerSDIV_v4i16(SDValue N0, SDValue N1, SDLoc dl, SelectionDAG &DAG) {
6269 // Convert to float.
6270 // float4 yf = vcvt_f32_s32(vmovl_s16(y));
6271 // float4 xf = vcvt_f32_s32(vmovl_s16(x));
6272 N0 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v4i32, N0);
6273 N1 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v4i32, N1);
6274 N0 = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, N0);
6275 N1 = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, N1);
6277 // Use reciprocal estimate and one refinement step.
6278 // float4 recip = vrecpeq_f32(yf);
6279 // recip *= vrecpsq_f32(yf, recip);
6280 N2 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
6281 DAG.getConstant(Intrinsic::arm_neon_vrecpe, dl, MVT::i32),
6283 N1 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
6284 DAG.getConstant(Intrinsic::arm_neon_vrecps, dl, MVT::i32),
6286 N2 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N1, N2);
6287 // Because short has a smaller range than ushort, we can actually get away
6288 // with only a single newton step. This requires that we use a weird bias
6289 // of 89, however (again, this has been exhaustively tested).
6290 // float4 result = as_float4(as_int4(xf*recip) + 0x89);
6291 N0 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N0, N2);
6292 N0 = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, N0);
6293 N1 = DAG.getConstant(0x89, dl, MVT::i32);
6294 N1 = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, N1, N1, N1, N1);
6295 N0 = DAG.getNode(ISD::ADD, dl, MVT::v4i32, N0, N1);
6296 N0 = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, N0);
6297 // Convert back to integer and return.
6298 // return vmovn_s32(vcvt_s32_f32(result));
6299 N0 = DAG.getNode(ISD::FP_TO_SINT, dl, MVT::v4i32, N0);
6300 N0 = DAG.getNode(ISD::TRUNCATE, dl, MVT::v4i16, N0);
6304 static SDValue LowerSDIV(SDValue Op, SelectionDAG &DAG) {
6305 EVT VT = Op.getValueType();
6306 assert((VT == MVT::v4i16 || VT == MVT::v8i8) &&
6307 "unexpected type for custom-lowering ISD::SDIV");
6310 SDValue N0 = Op.getOperand(0);
6311 SDValue N1 = Op.getOperand(1);
6314 if (VT == MVT::v8i8) {
6315 N0 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v8i16, N0);
6316 N1 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v8i16, N1);
6318 N2 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N0,
6319 DAG.getIntPtrConstant(4, dl));
6320 N3 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N1,
6321 DAG.getIntPtrConstant(4, dl));
6322 N0 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N0,
6323 DAG.getIntPtrConstant(0, dl));
6324 N1 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N1,
6325 DAG.getIntPtrConstant(0, dl));
6327 N0 = LowerSDIV_v4i8(N0, N1, dl, DAG); // v4i16
6328 N2 = LowerSDIV_v4i8(N2, N3, dl, DAG); // v4i16
6330 N0 = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v8i16, N0, N2);
6331 N0 = LowerCONCAT_VECTORS(N0, DAG);
6333 N0 = DAG.getNode(ISD::TRUNCATE, dl, MVT::v8i8, N0);
6336 return LowerSDIV_v4i16(N0, N1, dl, DAG);
6339 static SDValue LowerUDIV(SDValue Op, SelectionDAG &DAG) {
6340 EVT VT = Op.getValueType();
6341 assert((VT == MVT::v4i16 || VT == MVT::v8i8) &&
6342 "unexpected type for custom-lowering ISD::UDIV");
6345 SDValue N0 = Op.getOperand(0);
6346 SDValue N1 = Op.getOperand(1);
6349 if (VT == MVT::v8i8) {
6350 N0 = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::v8i16, N0);
6351 N1 = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::v8i16, N1);
6353 N2 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N0,
6354 DAG.getIntPtrConstant(4, dl));
6355 N3 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N1,
6356 DAG.getIntPtrConstant(4, dl));
6357 N0 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N0,
6358 DAG.getIntPtrConstant(0, dl));
6359 N1 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N1,
6360 DAG.getIntPtrConstant(0, dl));
6362 N0 = LowerSDIV_v4i16(N0, N1, dl, DAG); // v4i16
6363 N2 = LowerSDIV_v4i16(N2, N3, dl, DAG); // v4i16
6365 N0 = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v8i16, N0, N2);
6366 N0 = LowerCONCAT_VECTORS(N0, DAG);
6368 N0 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v8i8,
6369 DAG.getConstant(Intrinsic::arm_neon_vqmovnsu, dl,
6375 // v4i16 sdiv ... Convert to float.
6376 // float4 yf = vcvt_f32_s32(vmovl_u16(y));
6377 // float4 xf = vcvt_f32_s32(vmovl_u16(x));
6378 N0 = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::v4i32, N0);
6379 N1 = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::v4i32, N1);
6380 N0 = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, N0);
6381 SDValue BN1 = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, N1);
6383 // Use reciprocal estimate and two refinement steps.
6384 // float4 recip = vrecpeq_f32(yf);
6385 // recip *= vrecpsq_f32(yf, recip);
6386 // recip *= vrecpsq_f32(yf, recip);
6387 N2 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
6388 DAG.getConstant(Intrinsic::arm_neon_vrecpe, dl, MVT::i32),
6390 N1 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
6391 DAG.getConstant(Intrinsic::arm_neon_vrecps, dl, MVT::i32),
6393 N2 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N1, N2);
6394 N1 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
6395 DAG.getConstant(Intrinsic::arm_neon_vrecps, dl, MVT::i32),
6397 N2 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N1, N2);
6398 // Simply multiplying by the reciprocal estimate can leave us a few ulps
6399 // too low, so we add 2 ulps (exhaustive testing shows that this is enough,
6400 // and that it will never cause us to return an answer too large).
6401 // float4 result = as_float4(as_int4(xf*recip) + 2);
6402 N0 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N0, N2);
6403 N0 = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, N0);
6404 N1 = DAG.getConstant(2, dl, MVT::i32);
6405 N1 = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, N1, N1, N1, N1);
6406 N0 = DAG.getNode(ISD::ADD, dl, MVT::v4i32, N0, N1);
6407 N0 = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, N0);
6408 // Convert back to integer and return.
6409 // return vmovn_u32(vcvt_s32_f32(result));
6410 N0 = DAG.getNode(ISD::FP_TO_SINT, dl, MVT::v4i32, N0);
6411 N0 = DAG.getNode(ISD::TRUNCATE, dl, MVT::v4i16, N0);
6415 static SDValue LowerADDC_ADDE_SUBC_SUBE(SDValue Op, SelectionDAG &DAG) {
6416 EVT VT = Op.getNode()->getValueType(0);
6417 SDVTList VTs = DAG.getVTList(VT, MVT::i32);
6420 bool ExtraOp = false;
6421 switch (Op.getOpcode()) {
6422 default: llvm_unreachable("Invalid code");
6423 case ISD::ADDC: Opc = ARMISD::ADDC; break;
6424 case ISD::ADDE: Opc = ARMISD::ADDE; ExtraOp = true; break;
6425 case ISD::SUBC: Opc = ARMISD::SUBC; break;
6426 case ISD::SUBE: Opc = ARMISD::SUBE; ExtraOp = true; break;
6430 return DAG.getNode(Opc, SDLoc(Op), VTs, Op.getOperand(0),
6432 return DAG.getNode(Opc, SDLoc(Op), VTs, Op.getOperand(0),
6433 Op.getOperand(1), Op.getOperand(2));
6436 SDValue ARMTargetLowering::LowerFSINCOS(SDValue Op, SelectionDAG &DAG) const {
6437 assert(Subtarget->isTargetDarwin());
6439 // For iOS, we want to call an alternative entry point: __sincos_stret,
6440 // return values are passed via sret.
6442 SDValue Arg = Op.getOperand(0);
6443 EVT ArgVT = Arg.getValueType();
6444 Type *ArgTy = ArgVT.getTypeForEVT(*DAG.getContext());
6445 auto PtrVT = getPointerTy(DAG.getDataLayout());
6447 MachineFrameInfo *FrameInfo = DAG.getMachineFunction().getFrameInfo();
6449 // Pair of floats / doubles used to pass the result.
6450 StructType *RetTy = StructType::get(ArgTy, ArgTy, nullptr);
6452 // Create stack object for sret.
6453 auto &DL = DAG.getDataLayout();
6454 const uint64_t ByteSize = DL.getTypeAllocSize(RetTy);
6455 const unsigned StackAlign = DL.getPrefTypeAlignment(RetTy);
6456 int FrameIdx = FrameInfo->CreateStackObject(ByteSize, StackAlign, false);
6457 SDValue SRet = DAG.getFrameIndex(FrameIdx, getPointerTy(DL));
6463 Entry.Ty = RetTy->getPointerTo();
6464 Entry.isSExt = false;
6465 Entry.isZExt = false;
6466 Entry.isSRet = true;
6467 Args.push_back(Entry);
6471 Entry.isSExt = false;
6472 Entry.isZExt = false;
6473 Args.push_back(Entry);
6475 const char *LibcallName = (ArgVT == MVT::f64)
6476 ? "__sincos_stret" : "__sincosf_stret";
6477 SDValue Callee = DAG.getExternalSymbol(LibcallName, getPointerTy(DL));
6479 TargetLowering::CallLoweringInfo CLI(DAG);
6480 CLI.setDebugLoc(dl).setChain(DAG.getEntryNode())
6481 .setCallee(CallingConv::C, Type::getVoidTy(*DAG.getContext()), Callee,
6483 .setDiscardResult();
6485 std::pair<SDValue, SDValue> CallResult = LowerCallTo(CLI);
6487 SDValue LoadSin = DAG.getLoad(ArgVT, dl, CallResult.second, SRet,
6488 MachinePointerInfo(), false, false, false, 0);
6490 // Address of cos field.
6491 SDValue Add = DAG.getNode(ISD::ADD, dl, PtrVT, SRet,
6492 DAG.getIntPtrConstant(ArgVT.getStoreSize(), dl));
6493 SDValue LoadCos = DAG.getLoad(ArgVT, dl, LoadSin.getValue(1), Add,
6494 MachinePointerInfo(), false, false, false, 0);
6496 SDVTList Tys = DAG.getVTList(ArgVT, ArgVT);
6497 return DAG.getNode(ISD::MERGE_VALUES, dl, Tys,
6498 LoadSin.getValue(0), LoadCos.getValue(0));
6501 static SDValue LowerAtomicLoadStore(SDValue Op, SelectionDAG &DAG) {
6502 // Monotonic load/store is legal for all targets
6503 if (cast<AtomicSDNode>(Op)->getOrdering() <= Monotonic)
6506 // Acquire/Release load/store is not legal for targets without a
6507 // dmb or equivalent available.
6511 static void ReplaceREADCYCLECOUNTER(SDNode *N,
6512 SmallVectorImpl<SDValue> &Results,
6514 const ARMSubtarget *Subtarget) {
6516 SDValue Cycles32, OutChain;
6518 if (Subtarget->hasPerfMon()) {
6519 // Under Power Management extensions, the cycle-count is:
6520 // mrc p15, #0, <Rt>, c9, c13, #0
6521 SDValue Ops[] = { N->getOperand(0), // Chain
6522 DAG.getConstant(Intrinsic::arm_mrc, DL, MVT::i32),
6523 DAG.getConstant(15, DL, MVT::i32),
6524 DAG.getConstant(0, DL, MVT::i32),
6525 DAG.getConstant(9, DL, MVT::i32),
6526 DAG.getConstant(13, DL, MVT::i32),
6527 DAG.getConstant(0, DL, MVT::i32)
6530 Cycles32 = DAG.getNode(ISD::INTRINSIC_W_CHAIN, DL,
6531 DAG.getVTList(MVT::i32, MVT::Other), Ops);
6532 OutChain = Cycles32.getValue(1);
6534 // Intrinsic is defined to return 0 on unsupported platforms. Technically
6535 // there are older ARM CPUs that have implementation-specific ways of
6536 // obtaining this information (FIXME!).
6537 Cycles32 = DAG.getConstant(0, DL, MVT::i32);
6538 OutChain = DAG.getEntryNode();
6542 SDValue Cycles64 = DAG.getNode(ISD::BUILD_PAIR, DL, MVT::i64,
6543 Cycles32, DAG.getConstant(0, DL, MVT::i32));
6544 Results.push_back(Cycles64);
6545 Results.push_back(OutChain);
6548 SDValue ARMTargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const {
6549 switch (Op.getOpcode()) {
6550 default: llvm_unreachable("Don't know how to custom lower this!");
6551 case ISD::WRITE_REGISTER: return LowerWRITE_REGISTER(Op, DAG);
6552 case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
6553 case ISD::BlockAddress: return LowerBlockAddress(Op, DAG);
6554 case ISD::GlobalAddress:
6555 switch (Subtarget->getTargetTriple().getObjectFormat()) {
6556 default: llvm_unreachable("unknown object format");
6558 return LowerGlobalAddressWindows(Op, DAG);
6560 return LowerGlobalAddressELF(Op, DAG);
6562 return LowerGlobalAddressDarwin(Op, DAG);
6564 case ISD::GlobalTLSAddress: return LowerGlobalTLSAddress(Op, DAG);
6565 case ISD::SELECT: return LowerSELECT(Op, DAG);
6566 case ISD::SELECT_CC: return LowerSELECT_CC(Op, DAG);
6567 case ISD::BR_CC: return LowerBR_CC(Op, DAG);
6568 case ISD::BR_JT: return LowerBR_JT(Op, DAG);
6569 case ISD::VASTART: return LowerVASTART(Op, DAG);
6570 case ISD::ATOMIC_FENCE: return LowerATOMIC_FENCE(Op, DAG, Subtarget);
6571 case ISD::PREFETCH: return LowerPREFETCH(Op, DAG, Subtarget);
6572 case ISD::SINT_TO_FP:
6573 case ISD::UINT_TO_FP: return LowerINT_TO_FP(Op, DAG);
6574 case ISD::FP_TO_SINT:
6575 case ISD::FP_TO_UINT: return LowerFP_TO_INT(Op, DAG);
6576 case ISD::FCOPYSIGN: return LowerFCOPYSIGN(Op, DAG);
6577 case ISD::RETURNADDR: return LowerRETURNADDR(Op, DAG);
6578 case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
6579 case ISD::GLOBAL_OFFSET_TABLE: return LowerGLOBAL_OFFSET_TABLE(Op, DAG);
6580 case ISD::EH_SJLJ_SETJMP: return LowerEH_SJLJ_SETJMP(Op, DAG);
6581 case ISD::EH_SJLJ_LONGJMP: return LowerEH_SJLJ_LONGJMP(Op, DAG);
6582 case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG,
6584 case ISD::BITCAST: return ExpandBITCAST(Op.getNode(), DAG);
6587 case ISD::SRA: return LowerShift(Op.getNode(), DAG, Subtarget);
6588 case ISD::SHL_PARTS: return LowerShiftLeftParts(Op, DAG);
6589 case ISD::SRL_PARTS:
6590 case ISD::SRA_PARTS: return LowerShiftRightParts(Op, DAG);
6592 case ISD::CTTZ_ZERO_UNDEF: return LowerCTTZ(Op.getNode(), DAG, Subtarget);
6593 case ISD::CTPOP: return LowerCTPOP(Op.getNode(), DAG, Subtarget);
6594 case ISD::SETCC: return LowerVSETCC(Op, DAG);
6595 case ISD::ConstantFP: return LowerConstantFP(Op, DAG, Subtarget);
6596 case ISD::BUILD_VECTOR: return LowerBUILD_VECTOR(Op, DAG, Subtarget);
6597 case ISD::VECTOR_SHUFFLE: return LowerVECTOR_SHUFFLE(Op, DAG);
6598 case ISD::INSERT_VECTOR_ELT: return LowerINSERT_VECTOR_ELT(Op, DAG);
6599 case ISD::EXTRACT_VECTOR_ELT: return LowerEXTRACT_VECTOR_ELT(Op, DAG);
6600 case ISD::CONCAT_VECTORS: return LowerCONCAT_VECTORS(Op, DAG);
6601 case ISD::FLT_ROUNDS_: return LowerFLT_ROUNDS_(Op, DAG);
6602 case ISD::MUL: return LowerMUL(Op, DAG);
6603 case ISD::SDIV: return LowerSDIV(Op, DAG);
6604 case ISD::UDIV: return LowerUDIV(Op, DAG);
6608 case ISD::SUBE: return LowerADDC_ADDE_SUBC_SUBE(Op, DAG);
6613 return LowerXALUO(Op, DAG);
6614 case ISD::ATOMIC_LOAD:
6615 case ISD::ATOMIC_STORE: return LowerAtomicLoadStore(Op, DAG);
6616 case ISD::FSINCOS: return LowerFSINCOS(Op, DAG);
6618 case ISD::UDIVREM: return LowerDivRem(Op, DAG);
6619 case ISD::DYNAMIC_STACKALLOC:
6620 if (Subtarget->getTargetTriple().isWindowsItaniumEnvironment())
6621 return LowerDYNAMIC_STACKALLOC(Op, DAG);
6622 llvm_unreachable("Don't know how to custom lower this!");
6623 case ISD::FP_ROUND: return LowerFP_ROUND(Op, DAG);
6624 case ISD::FP_EXTEND: return LowerFP_EXTEND(Op, DAG);
6628 /// ReplaceNodeResults - Replace the results of node with an illegal result
6629 /// type with new values built out of custom code.
6630 void ARMTargetLowering::ReplaceNodeResults(SDNode *N,
6631 SmallVectorImpl<SDValue>&Results,
6632 SelectionDAG &DAG) const {
6634 switch (N->getOpcode()) {
6636 llvm_unreachable("Don't know how to custom expand this!");
6637 case ISD::READ_REGISTER:
6638 ExpandREAD_REGISTER(N, Results, DAG);
6641 Res = ExpandBITCAST(N, DAG);
6645 Res = Expand64BitShift(N, DAG, Subtarget);
6647 case ISD::READCYCLECOUNTER:
6648 ReplaceREADCYCLECOUNTER(N, Results, DAG, Subtarget);
6652 Results.push_back(Res);
6655 //===----------------------------------------------------------------------===//
6656 // ARM Scheduler Hooks
6657 //===----------------------------------------------------------------------===//
6659 /// SetupEntryBlockForSjLj - Insert code into the entry block that creates and
6660 /// registers the function context.
6661 void ARMTargetLowering::
6662 SetupEntryBlockForSjLj(MachineInstr *MI, MachineBasicBlock *MBB,
6663 MachineBasicBlock *DispatchBB, int FI) const {
6664 const TargetInstrInfo *TII = Subtarget->getInstrInfo();
6665 DebugLoc dl = MI->getDebugLoc();
6666 MachineFunction *MF = MBB->getParent();
6667 MachineRegisterInfo *MRI = &MF->getRegInfo();
6668 MachineConstantPool *MCP = MF->getConstantPool();
6669 ARMFunctionInfo *AFI = MF->getInfo<ARMFunctionInfo>();
6670 const Function *F = MF->getFunction();
6672 bool isThumb = Subtarget->isThumb();
6673 bool isThumb2 = Subtarget->isThumb2();
6675 unsigned PCLabelId = AFI->createPICLabelUId();
6676 unsigned PCAdj = (isThumb || isThumb2) ? 4 : 8;
6677 ARMConstantPoolValue *CPV =
6678 ARMConstantPoolMBB::Create(F->getContext(), DispatchBB, PCLabelId, PCAdj);
6679 unsigned CPI = MCP->getConstantPoolIndex(CPV, 4);
6681 const TargetRegisterClass *TRC = isThumb ? &ARM::tGPRRegClass
6682 : &ARM::GPRRegClass;
6684 // Grab constant pool and fixed stack memory operands.
6685 MachineMemOperand *CPMMO =
6686 MF->getMachineMemOperand(MachinePointerInfo::getConstantPool(),
6687 MachineMemOperand::MOLoad, 4, 4);
6689 MachineMemOperand *FIMMOSt =
6690 MF->getMachineMemOperand(MachinePointerInfo::getFixedStack(FI),
6691 MachineMemOperand::MOStore, 4, 4);
6693 // Load the address of the dispatch MBB into the jump buffer.
6695 // Incoming value: jbuf
6696 // ldr.n r5, LCPI1_1
6699 // str r5, [$jbuf, #+4] ; &jbuf[1]
6700 unsigned NewVReg1 = MRI->createVirtualRegister(TRC);
6701 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::t2LDRpci), NewVReg1)
6702 .addConstantPoolIndex(CPI)
6703 .addMemOperand(CPMMO));
6704 // Set the low bit because of thumb mode.
6705 unsigned NewVReg2 = MRI->createVirtualRegister(TRC);
6707 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::t2ORRri), NewVReg2)
6708 .addReg(NewVReg1, RegState::Kill)
6710 unsigned NewVReg3 = MRI->createVirtualRegister(TRC);
6711 BuildMI(*MBB, MI, dl, TII->get(ARM::tPICADD), NewVReg3)
6712 .addReg(NewVReg2, RegState::Kill)
6714 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::t2STRi12))
6715 .addReg(NewVReg3, RegState::Kill)
6717 .addImm(36) // &jbuf[1] :: pc
6718 .addMemOperand(FIMMOSt));
6719 } else if (isThumb) {
6720 // Incoming value: jbuf
6721 // ldr.n r1, LCPI1_4
6725 // add r2, $jbuf, #+4 ; &jbuf[1]
6727 unsigned NewVReg1 = MRI->createVirtualRegister(TRC);
6728 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::tLDRpci), NewVReg1)
6729 .addConstantPoolIndex(CPI)
6730 .addMemOperand(CPMMO));
6731 unsigned NewVReg2 = MRI->createVirtualRegister(TRC);
6732 BuildMI(*MBB, MI, dl, TII->get(ARM::tPICADD), NewVReg2)
6733 .addReg(NewVReg1, RegState::Kill)
6735 // Set the low bit because of thumb mode.
6736 unsigned NewVReg3 = MRI->createVirtualRegister(TRC);
6737 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::tMOVi8), NewVReg3)
6738 .addReg(ARM::CPSR, RegState::Define)
6740 unsigned NewVReg4 = MRI->createVirtualRegister(TRC);
6741 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::tORR), NewVReg4)
6742 .addReg(ARM::CPSR, RegState::Define)
6743 .addReg(NewVReg2, RegState::Kill)
6744 .addReg(NewVReg3, RegState::Kill));
6745 unsigned NewVReg5 = MRI->createVirtualRegister(TRC);
6746 BuildMI(*MBB, MI, dl, TII->get(ARM::tADDframe), NewVReg5)
6748 .addImm(36); // &jbuf[1] :: pc
6749 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::tSTRi))
6750 .addReg(NewVReg4, RegState::Kill)
6751 .addReg(NewVReg5, RegState::Kill)
6753 .addMemOperand(FIMMOSt));
6755 // Incoming value: jbuf
6758 // str r1, [$jbuf, #+4] ; &jbuf[1]
6759 unsigned NewVReg1 = MRI->createVirtualRegister(TRC);
6760 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::LDRi12), NewVReg1)
6761 .addConstantPoolIndex(CPI)
6763 .addMemOperand(CPMMO));
6764 unsigned NewVReg2 = MRI->createVirtualRegister(TRC);
6765 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::PICADD), NewVReg2)
6766 .addReg(NewVReg1, RegState::Kill)
6767 .addImm(PCLabelId));
6768 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::STRi12))
6769 .addReg(NewVReg2, RegState::Kill)
6771 .addImm(36) // &jbuf[1] :: pc
6772 .addMemOperand(FIMMOSt));
6776 void ARMTargetLowering::EmitSjLjDispatchBlock(MachineInstr *MI,
6777 MachineBasicBlock *MBB) const {
6778 const TargetInstrInfo *TII = Subtarget->getInstrInfo();
6779 DebugLoc dl = MI->getDebugLoc();
6780 MachineFunction *MF = MBB->getParent();
6781 MachineRegisterInfo *MRI = &MF->getRegInfo();
6782 MachineFrameInfo *MFI = MF->getFrameInfo();
6783 int FI = MFI->getFunctionContextIndex();
6785 const TargetRegisterClass *TRC = Subtarget->isThumb() ? &ARM::tGPRRegClass
6786 : &ARM::GPRnopcRegClass;
6788 // Get a mapping of the call site numbers to all of the landing pads they're
6790 DenseMap<unsigned, SmallVector<MachineBasicBlock*, 2> > CallSiteNumToLPad;
6791 unsigned MaxCSNum = 0;
6792 MachineModuleInfo &MMI = MF->getMMI();
6793 for (MachineFunction::iterator BB = MF->begin(), E = MF->end(); BB != E;
6795 if (!BB->isLandingPad()) continue;
6797 // FIXME: We should assert that the EH_LABEL is the first MI in the landing
6799 for (MachineBasicBlock::iterator
6800 II = BB->begin(), IE = BB->end(); II != IE; ++II) {
6801 if (!II->isEHLabel()) continue;
6803 MCSymbol *Sym = II->getOperand(0).getMCSymbol();
6804 if (!MMI.hasCallSiteLandingPad(Sym)) continue;
6806 SmallVectorImpl<unsigned> &CallSiteIdxs = MMI.getCallSiteLandingPad(Sym);
6807 for (SmallVectorImpl<unsigned>::iterator
6808 CSI = CallSiteIdxs.begin(), CSE = CallSiteIdxs.end();
6809 CSI != CSE; ++CSI) {
6810 CallSiteNumToLPad[*CSI].push_back(BB);
6811 MaxCSNum = std::max(MaxCSNum, *CSI);
6817 // Get an ordered list of the machine basic blocks for the jump table.
6818 std::vector<MachineBasicBlock*> LPadList;
6819 SmallPtrSet<MachineBasicBlock*, 64> InvokeBBs;
6820 LPadList.reserve(CallSiteNumToLPad.size());
6821 for (unsigned I = 1; I <= MaxCSNum; ++I) {
6822 SmallVectorImpl<MachineBasicBlock*> &MBBList = CallSiteNumToLPad[I];
6823 for (SmallVectorImpl<MachineBasicBlock*>::iterator
6824 II = MBBList.begin(), IE = MBBList.end(); II != IE; ++II) {
6825 LPadList.push_back(*II);
6826 InvokeBBs.insert((*II)->pred_begin(), (*II)->pred_end());
6830 assert(!LPadList.empty() &&
6831 "No landing pad destinations for the dispatch jump table!");
6833 // Create the jump table and associated information.
6834 MachineJumpTableInfo *JTI =
6835 MF->getOrCreateJumpTableInfo(MachineJumpTableInfo::EK_Inline);
6836 unsigned MJTI = JTI->createJumpTableIndex(LPadList);
6837 Reloc::Model RelocM = getTargetMachine().getRelocationModel();
6839 // Create the MBBs for the dispatch code.
6841 // Shove the dispatch's address into the return slot in the function context.
6842 MachineBasicBlock *DispatchBB = MF->CreateMachineBasicBlock();
6843 DispatchBB->setIsLandingPad();
6845 MachineBasicBlock *TrapBB = MF->CreateMachineBasicBlock();
6846 unsigned trap_opcode;
6847 if (Subtarget->isThumb())
6848 trap_opcode = ARM::tTRAP;
6850 trap_opcode = Subtarget->useNaClTrap() ? ARM::TRAPNaCl : ARM::TRAP;
6852 BuildMI(TrapBB, dl, TII->get(trap_opcode));
6853 DispatchBB->addSuccessor(TrapBB);
6855 MachineBasicBlock *DispContBB = MF->CreateMachineBasicBlock();
6856 DispatchBB->addSuccessor(DispContBB);
6859 MF->insert(MF->end(), DispatchBB);
6860 MF->insert(MF->end(), DispContBB);
6861 MF->insert(MF->end(), TrapBB);
6863 // Insert code into the entry block that creates and registers the function
6865 SetupEntryBlockForSjLj(MI, MBB, DispatchBB, FI);
6867 MachineMemOperand *FIMMOLd =
6868 MF->getMachineMemOperand(MachinePointerInfo::getFixedStack(FI),
6869 MachineMemOperand::MOLoad |
6870 MachineMemOperand::MOVolatile, 4, 4);
6872 MachineInstrBuilder MIB;
6873 MIB = BuildMI(DispatchBB, dl, TII->get(ARM::Int_eh_sjlj_dispatchsetup));
6875 const ARMBaseInstrInfo *AII = static_cast<const ARMBaseInstrInfo*>(TII);
6876 const ARMBaseRegisterInfo &RI = AII->getRegisterInfo();
6878 // Add a register mask with no preserved registers. This results in all
6879 // registers being marked as clobbered.
6880 MIB.addRegMask(RI.getNoPreservedMask());
6882 unsigned NumLPads = LPadList.size();
6883 if (Subtarget->isThumb2()) {
6884 unsigned NewVReg1 = MRI->createVirtualRegister(TRC);
6885 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::t2LDRi12), NewVReg1)
6888 .addMemOperand(FIMMOLd));
6890 if (NumLPads < 256) {
6891 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::t2CMPri))
6893 .addImm(LPadList.size()));
6895 unsigned VReg1 = MRI->createVirtualRegister(TRC);
6896 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::t2MOVi16), VReg1)
6897 .addImm(NumLPads & 0xFFFF));
6899 unsigned VReg2 = VReg1;
6900 if ((NumLPads & 0xFFFF0000) != 0) {
6901 VReg2 = MRI->createVirtualRegister(TRC);
6902 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::t2MOVTi16), VReg2)
6904 .addImm(NumLPads >> 16));
6907 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::t2CMPrr))
6912 BuildMI(DispatchBB, dl, TII->get(ARM::t2Bcc))
6917 unsigned NewVReg3 = MRI->createVirtualRegister(TRC);
6918 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::t2LEApcrelJT),NewVReg3)
6919 .addJumpTableIndex(MJTI));
6921 unsigned NewVReg4 = MRI->createVirtualRegister(TRC);
6924 BuildMI(DispContBB, dl, TII->get(ARM::t2ADDrs), NewVReg4)
6925 .addReg(NewVReg3, RegState::Kill)
6927 .addImm(ARM_AM::getSORegOpc(ARM_AM::lsl, 2))));
6929 BuildMI(DispContBB, dl, TII->get(ARM::t2BR_JT))
6930 .addReg(NewVReg4, RegState::Kill)
6932 .addJumpTableIndex(MJTI);
6933 } else if (Subtarget->isThumb()) {
6934 unsigned NewVReg1 = MRI->createVirtualRegister(TRC);
6935 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::tLDRspi), NewVReg1)
6938 .addMemOperand(FIMMOLd));
6940 if (NumLPads < 256) {
6941 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::tCMPi8))
6945 MachineConstantPool *ConstantPool = MF->getConstantPool();
6946 Type *Int32Ty = Type::getInt32Ty(MF->getFunction()->getContext());
6947 const Constant *C = ConstantInt::get(Int32Ty, NumLPads);
6949 // MachineConstantPool wants an explicit alignment.
6950 unsigned Align = MF->getDataLayout().getPrefTypeAlignment(Int32Ty);
6952 Align = MF->getDataLayout().getTypeAllocSize(C->getType());
6953 unsigned Idx = ConstantPool->getConstantPoolIndex(C, Align);
6955 unsigned VReg1 = MRI->createVirtualRegister(TRC);
6956 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::tLDRpci))
6957 .addReg(VReg1, RegState::Define)
6958 .addConstantPoolIndex(Idx));
6959 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::tCMPr))
6964 BuildMI(DispatchBB, dl, TII->get(ARM::tBcc))
6969 unsigned NewVReg2 = MRI->createVirtualRegister(TRC);
6970 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::tLSLri), NewVReg2)
6971 .addReg(ARM::CPSR, RegState::Define)
6975 unsigned NewVReg3 = MRI->createVirtualRegister(TRC);
6976 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::tLEApcrelJT), NewVReg3)
6977 .addJumpTableIndex(MJTI));
6979 unsigned NewVReg4 = MRI->createVirtualRegister(TRC);
6980 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::tADDrr), NewVReg4)
6981 .addReg(ARM::CPSR, RegState::Define)
6982 .addReg(NewVReg2, RegState::Kill)
6985 MachineMemOperand *JTMMOLd =
6986 MF->getMachineMemOperand(MachinePointerInfo::getJumpTable(),
6987 MachineMemOperand::MOLoad, 4, 4);
6989 unsigned NewVReg5 = MRI->createVirtualRegister(TRC);
6990 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::tLDRi), NewVReg5)
6991 .addReg(NewVReg4, RegState::Kill)
6993 .addMemOperand(JTMMOLd));
6995 unsigned NewVReg6 = NewVReg5;
6996 if (RelocM == Reloc::PIC_) {
6997 NewVReg6 = MRI->createVirtualRegister(TRC);
6998 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::tADDrr), NewVReg6)
6999 .addReg(ARM::CPSR, RegState::Define)
7000 .addReg(NewVReg5, RegState::Kill)
7004 BuildMI(DispContBB, dl, TII->get(ARM::tBR_JTr))
7005 .addReg(NewVReg6, RegState::Kill)
7006 .addJumpTableIndex(MJTI);
7008 unsigned NewVReg1 = MRI->createVirtualRegister(TRC);
7009 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::LDRi12), NewVReg1)
7012 .addMemOperand(FIMMOLd));
7014 if (NumLPads < 256) {
7015 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::CMPri))
7018 } else if (Subtarget->hasV6T2Ops() && isUInt<16>(NumLPads)) {
7019 unsigned VReg1 = MRI->createVirtualRegister(TRC);
7020 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::MOVi16), VReg1)
7021 .addImm(NumLPads & 0xFFFF));
7023 unsigned VReg2 = VReg1;
7024 if ((NumLPads & 0xFFFF0000) != 0) {
7025 VReg2 = MRI->createVirtualRegister(TRC);
7026 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::MOVTi16), VReg2)
7028 .addImm(NumLPads >> 16));
7031 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::CMPrr))
7035 MachineConstantPool *ConstantPool = MF->getConstantPool();
7036 Type *Int32Ty = Type::getInt32Ty(MF->getFunction()->getContext());
7037 const Constant *C = ConstantInt::get(Int32Ty, NumLPads);
7039 // MachineConstantPool wants an explicit alignment.
7040 unsigned Align = MF->getDataLayout().getPrefTypeAlignment(Int32Ty);
7042 Align = MF->getDataLayout().getTypeAllocSize(C->getType());
7043 unsigned Idx = ConstantPool->getConstantPoolIndex(C, Align);
7045 unsigned VReg1 = MRI->createVirtualRegister(TRC);
7046 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::LDRcp))
7047 .addReg(VReg1, RegState::Define)
7048 .addConstantPoolIndex(Idx)
7050 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::CMPrr))
7052 .addReg(VReg1, RegState::Kill));
7055 BuildMI(DispatchBB, dl, TII->get(ARM::Bcc))
7060 unsigned NewVReg3 = MRI->createVirtualRegister(TRC);
7062 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::MOVsi), NewVReg3)
7064 .addImm(ARM_AM::getSORegOpc(ARM_AM::lsl, 2))));
7065 unsigned NewVReg4 = MRI->createVirtualRegister(TRC);
7066 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::LEApcrelJT), NewVReg4)
7067 .addJumpTableIndex(MJTI));
7069 MachineMemOperand *JTMMOLd =
7070 MF->getMachineMemOperand(MachinePointerInfo::getJumpTable(),
7071 MachineMemOperand::MOLoad, 4, 4);
7072 unsigned NewVReg5 = MRI->createVirtualRegister(TRC);
7074 BuildMI(DispContBB, dl, TII->get(ARM::LDRrs), NewVReg5)
7075 .addReg(NewVReg3, RegState::Kill)
7078 .addMemOperand(JTMMOLd));
7080 if (RelocM == Reloc::PIC_) {
7081 BuildMI(DispContBB, dl, TII->get(ARM::BR_JTadd))
7082 .addReg(NewVReg5, RegState::Kill)
7084 .addJumpTableIndex(MJTI);
7086 BuildMI(DispContBB, dl, TII->get(ARM::BR_JTr))
7087 .addReg(NewVReg5, RegState::Kill)
7088 .addJumpTableIndex(MJTI);
7092 // Add the jump table entries as successors to the MBB.
7093 SmallPtrSet<MachineBasicBlock*, 8> SeenMBBs;
7094 for (std::vector<MachineBasicBlock*>::iterator
7095 I = LPadList.begin(), E = LPadList.end(); I != E; ++I) {
7096 MachineBasicBlock *CurMBB = *I;
7097 if (SeenMBBs.insert(CurMBB).second)
7098 DispContBB->addSuccessor(CurMBB);
7101 // N.B. the order the invoke BBs are processed in doesn't matter here.
7102 const MCPhysReg *SavedRegs = RI.getCalleeSavedRegs(MF);
7103 SmallVector<MachineBasicBlock*, 64> MBBLPads;
7104 for (MachineBasicBlock *BB : InvokeBBs) {
7106 // Remove the landing pad successor from the invoke block and replace it
7107 // with the new dispatch block.
7108 SmallVector<MachineBasicBlock*, 4> Successors(BB->succ_begin(),
7110 while (!Successors.empty()) {
7111 MachineBasicBlock *SMBB = Successors.pop_back_val();
7112 if (SMBB->isLandingPad()) {
7113 BB->removeSuccessor(SMBB);
7114 MBBLPads.push_back(SMBB);
7118 BB->addSuccessor(DispatchBB);
7120 // Find the invoke call and mark all of the callee-saved registers as
7121 // 'implicit defined' so that they're spilled. This prevents code from
7122 // moving instructions to before the EH block, where they will never be
7124 for (MachineBasicBlock::reverse_iterator
7125 II = BB->rbegin(), IE = BB->rend(); II != IE; ++II) {
7126 if (!II->isCall()) continue;
7128 DenseMap<unsigned, bool> DefRegs;
7129 for (MachineInstr::mop_iterator
7130 OI = II->operands_begin(), OE = II->operands_end();
7132 if (!OI->isReg()) continue;
7133 DefRegs[OI->getReg()] = true;
7136 MachineInstrBuilder MIB(*MF, &*II);
7138 for (unsigned i = 0; SavedRegs[i] != 0; ++i) {
7139 unsigned Reg = SavedRegs[i];
7140 if (Subtarget->isThumb2() &&
7141 !ARM::tGPRRegClass.contains(Reg) &&
7142 !ARM::hGPRRegClass.contains(Reg))
7144 if (Subtarget->isThumb1Only() && !ARM::tGPRRegClass.contains(Reg))
7146 if (!Subtarget->isThumb() && !ARM::GPRRegClass.contains(Reg))
7149 MIB.addReg(Reg, RegState::ImplicitDefine | RegState::Dead);
7156 // Mark all former landing pads as non-landing pads. The dispatch is the only
7158 for (SmallVectorImpl<MachineBasicBlock*>::iterator
7159 I = MBBLPads.begin(), E = MBBLPads.end(); I != E; ++I)
7160 (*I)->setIsLandingPad(false);
7162 // The instruction is gone now.
7163 MI->eraseFromParent();
7167 MachineBasicBlock *OtherSucc(MachineBasicBlock *MBB, MachineBasicBlock *Succ) {
7168 for (MachineBasicBlock::succ_iterator I = MBB->succ_begin(),
7169 E = MBB->succ_end(); I != E; ++I)
7172 llvm_unreachable("Expecting a BB with two successors!");
7175 /// Return the load opcode for a given load size. If load size >= 8,
7176 /// neon opcode will be returned.
7177 static unsigned getLdOpcode(unsigned LdSize, bool IsThumb1, bool IsThumb2) {
7179 return LdSize == 16 ? ARM::VLD1q32wb_fixed
7180 : LdSize == 8 ? ARM::VLD1d32wb_fixed : 0;
7182 return LdSize == 4 ? ARM::tLDRi
7183 : LdSize == 2 ? ARM::tLDRHi
7184 : LdSize == 1 ? ARM::tLDRBi : 0;
7186 return LdSize == 4 ? ARM::t2LDR_POST
7187 : LdSize == 2 ? ARM::t2LDRH_POST
7188 : LdSize == 1 ? ARM::t2LDRB_POST : 0;
7189 return LdSize == 4 ? ARM::LDR_POST_IMM
7190 : LdSize == 2 ? ARM::LDRH_POST
7191 : LdSize == 1 ? ARM::LDRB_POST_IMM : 0;
7194 /// Return the store opcode for a given store size. If store size >= 8,
7195 /// neon opcode will be returned.
7196 static unsigned getStOpcode(unsigned StSize, bool IsThumb1, bool IsThumb2) {
7198 return StSize == 16 ? ARM::VST1q32wb_fixed
7199 : StSize == 8 ? ARM::VST1d32wb_fixed : 0;
7201 return StSize == 4 ? ARM::tSTRi
7202 : StSize == 2 ? ARM::tSTRHi
7203 : StSize == 1 ? ARM::tSTRBi : 0;
7205 return StSize == 4 ? ARM::t2STR_POST
7206 : StSize == 2 ? ARM::t2STRH_POST
7207 : StSize == 1 ? ARM::t2STRB_POST : 0;
7208 return StSize == 4 ? ARM::STR_POST_IMM
7209 : StSize == 2 ? ARM::STRH_POST
7210 : StSize == 1 ? ARM::STRB_POST_IMM : 0;
7213 /// Emit a post-increment load operation with given size. The instructions
7214 /// will be added to BB at Pos.
7215 static void emitPostLd(MachineBasicBlock *BB, MachineInstr *Pos,
7216 const TargetInstrInfo *TII, DebugLoc dl,
7217 unsigned LdSize, unsigned Data, unsigned AddrIn,
7218 unsigned AddrOut, bool IsThumb1, bool IsThumb2) {
7219 unsigned LdOpc = getLdOpcode(LdSize, IsThumb1, IsThumb2);
7220 assert(LdOpc != 0 && "Should have a load opcode");
7222 AddDefaultPred(BuildMI(*BB, Pos, dl, TII->get(LdOpc), Data)
7223 .addReg(AddrOut, RegState::Define).addReg(AddrIn)
7225 } else if (IsThumb1) {
7226 // load + update AddrIn
7227 AddDefaultPred(BuildMI(*BB, Pos, dl, TII->get(LdOpc), Data)
7228 .addReg(AddrIn).addImm(0));
7229 MachineInstrBuilder MIB =
7230 BuildMI(*BB, Pos, dl, TII->get(ARM::tADDi8), AddrOut);
7231 MIB = AddDefaultT1CC(MIB);
7232 MIB.addReg(AddrIn).addImm(LdSize);
7233 AddDefaultPred(MIB);
7234 } else if (IsThumb2) {
7235 AddDefaultPred(BuildMI(*BB, Pos, dl, TII->get(LdOpc), Data)
7236 .addReg(AddrOut, RegState::Define).addReg(AddrIn)
7239 AddDefaultPred(BuildMI(*BB, Pos, dl, TII->get(LdOpc), Data)
7240 .addReg(AddrOut, RegState::Define).addReg(AddrIn)
7241 .addReg(0).addImm(LdSize));
7245 /// Emit a post-increment store operation with given size. The instructions
7246 /// will be added to BB at Pos.
7247 static void emitPostSt(MachineBasicBlock *BB, MachineInstr *Pos,
7248 const TargetInstrInfo *TII, DebugLoc dl,
7249 unsigned StSize, unsigned Data, unsigned AddrIn,
7250 unsigned AddrOut, bool IsThumb1, bool IsThumb2) {
7251 unsigned StOpc = getStOpcode(StSize, IsThumb1, IsThumb2);
7252 assert(StOpc != 0 && "Should have a store opcode");
7254 AddDefaultPred(BuildMI(*BB, Pos, dl, TII->get(StOpc), AddrOut)
7255 .addReg(AddrIn).addImm(0).addReg(Data));
7256 } else if (IsThumb1) {
7257 // store + update AddrIn
7258 AddDefaultPred(BuildMI(*BB, Pos, dl, TII->get(StOpc)).addReg(Data)
7259 .addReg(AddrIn).addImm(0));
7260 MachineInstrBuilder MIB =
7261 BuildMI(*BB, Pos, dl, TII->get(ARM::tADDi8), AddrOut);
7262 MIB = AddDefaultT1CC(MIB);
7263 MIB.addReg(AddrIn).addImm(StSize);
7264 AddDefaultPred(MIB);
7265 } else if (IsThumb2) {
7266 AddDefaultPred(BuildMI(*BB, Pos, dl, TII->get(StOpc), AddrOut)
7267 .addReg(Data).addReg(AddrIn).addImm(StSize));
7269 AddDefaultPred(BuildMI(*BB, Pos, dl, TII->get(StOpc), AddrOut)
7270 .addReg(Data).addReg(AddrIn).addReg(0)
7276 ARMTargetLowering::EmitStructByval(MachineInstr *MI,
7277 MachineBasicBlock *BB) const {
7278 // This pseudo instruction has 3 operands: dst, src, size
7279 // We expand it to a loop if size > Subtarget->getMaxInlineSizeThreshold().
7280 // Otherwise, we will generate unrolled scalar copies.
7281 const TargetInstrInfo *TII = Subtarget->getInstrInfo();
7282 const BasicBlock *LLVM_BB = BB->getBasicBlock();
7283 MachineFunction::iterator It = BB;
7286 unsigned dest = MI->getOperand(0).getReg();
7287 unsigned src = MI->getOperand(1).getReg();
7288 unsigned SizeVal = MI->getOperand(2).getImm();
7289 unsigned Align = MI->getOperand(3).getImm();
7290 DebugLoc dl = MI->getDebugLoc();
7292 MachineFunction *MF = BB->getParent();
7293 MachineRegisterInfo &MRI = MF->getRegInfo();
7294 unsigned UnitSize = 0;
7295 const TargetRegisterClass *TRC = nullptr;
7296 const TargetRegisterClass *VecTRC = nullptr;
7298 bool IsThumb1 = Subtarget->isThumb1Only();
7299 bool IsThumb2 = Subtarget->isThumb2();
7303 } else if (Align & 2) {
7306 // Check whether we can use NEON instructions.
7307 if (!MF->getFunction()->hasFnAttribute(Attribute::NoImplicitFloat) &&
7308 Subtarget->hasNEON()) {
7309 if ((Align % 16 == 0) && SizeVal >= 16)
7311 else if ((Align % 8 == 0) && SizeVal >= 8)
7314 // Can't use NEON instructions.
7319 // Select the correct opcode and register class for unit size load/store
7320 bool IsNeon = UnitSize >= 8;
7321 TRC = (IsThumb1 || IsThumb2) ? &ARM::tGPRRegClass : &ARM::GPRRegClass;
7323 VecTRC = UnitSize == 16 ? &ARM::DPairRegClass
7324 : UnitSize == 8 ? &ARM::DPRRegClass
7327 unsigned BytesLeft = SizeVal % UnitSize;
7328 unsigned LoopSize = SizeVal - BytesLeft;
7330 if (SizeVal <= Subtarget->getMaxInlineSizeThreshold()) {
7331 // Use LDR and STR to copy.
7332 // [scratch, srcOut] = LDR_POST(srcIn, UnitSize)
7333 // [destOut] = STR_POST(scratch, destIn, UnitSize)
7334 unsigned srcIn = src;
7335 unsigned destIn = dest;
7336 for (unsigned i = 0; i < LoopSize; i+=UnitSize) {
7337 unsigned srcOut = MRI.createVirtualRegister(TRC);
7338 unsigned destOut = MRI.createVirtualRegister(TRC);
7339 unsigned scratch = MRI.createVirtualRegister(IsNeon ? VecTRC : TRC);
7340 emitPostLd(BB, MI, TII, dl, UnitSize, scratch, srcIn, srcOut,
7341 IsThumb1, IsThumb2);
7342 emitPostSt(BB, MI, TII, dl, UnitSize, scratch, destIn, destOut,
7343 IsThumb1, IsThumb2);
7348 // Handle the leftover bytes with LDRB and STRB.
7349 // [scratch, srcOut] = LDRB_POST(srcIn, 1)
7350 // [destOut] = STRB_POST(scratch, destIn, 1)
7351 for (unsigned i = 0; i < BytesLeft; i++) {
7352 unsigned srcOut = MRI.createVirtualRegister(TRC);
7353 unsigned destOut = MRI.createVirtualRegister(TRC);
7354 unsigned scratch = MRI.createVirtualRegister(TRC);
7355 emitPostLd(BB, MI, TII, dl, 1, scratch, srcIn, srcOut,
7356 IsThumb1, IsThumb2);
7357 emitPostSt(BB, MI, TII, dl, 1, scratch, destIn, destOut,
7358 IsThumb1, IsThumb2);
7362 MI->eraseFromParent(); // The instruction is gone now.
7366 // Expand the pseudo op to a loop.
7369 // movw varEnd, # --> with thumb2
7371 // ldrcp varEnd, idx --> without thumb2
7372 // fallthrough --> loopMBB
7374 // PHI varPhi, varEnd, varLoop
7375 // PHI srcPhi, src, srcLoop
7376 // PHI destPhi, dst, destLoop
7377 // [scratch, srcLoop] = LDR_POST(srcPhi, UnitSize)
7378 // [destLoop] = STR_POST(scratch, destPhi, UnitSize)
7379 // subs varLoop, varPhi, #UnitSize
7381 // fallthrough --> exitMBB
7383 // epilogue to handle left-over bytes
7384 // [scratch, srcOut] = LDRB_POST(srcLoop, 1)
7385 // [destOut] = STRB_POST(scratch, destLoop, 1)
7386 MachineBasicBlock *loopMBB = MF->CreateMachineBasicBlock(LLVM_BB);
7387 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
7388 MF->insert(It, loopMBB);
7389 MF->insert(It, exitMBB);
7391 // Transfer the remainder of BB and its successor edges to exitMBB.
7392 exitMBB->splice(exitMBB->begin(), BB,
7393 std::next(MachineBasicBlock::iterator(MI)), BB->end());
7394 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
7396 // Load an immediate to varEnd.
7397 unsigned varEnd = MRI.createVirtualRegister(TRC);
7398 if (Subtarget->useMovt(*MF)) {
7399 unsigned Vtmp = varEnd;
7400 if ((LoopSize & 0xFFFF0000) != 0)
7401 Vtmp = MRI.createVirtualRegister(TRC);
7402 AddDefaultPred(BuildMI(BB, dl,
7403 TII->get(IsThumb2 ? ARM::t2MOVi16 : ARM::MOVi16),
7404 Vtmp).addImm(LoopSize & 0xFFFF));
7406 if ((LoopSize & 0xFFFF0000) != 0)
7407 AddDefaultPred(BuildMI(BB, dl,
7408 TII->get(IsThumb2 ? ARM::t2MOVTi16 : ARM::MOVTi16),
7411 .addImm(LoopSize >> 16));
7413 MachineConstantPool *ConstantPool = MF->getConstantPool();
7414 Type *Int32Ty = Type::getInt32Ty(MF->getFunction()->getContext());
7415 const Constant *C = ConstantInt::get(Int32Ty, LoopSize);
7417 // MachineConstantPool wants an explicit alignment.
7418 unsigned Align = MF->getDataLayout().getPrefTypeAlignment(Int32Ty);
7420 Align = MF->getDataLayout().getTypeAllocSize(C->getType());
7421 unsigned Idx = ConstantPool->getConstantPoolIndex(C, Align);
7424 AddDefaultPred(BuildMI(*BB, MI, dl, TII->get(ARM::tLDRpci)).addReg(
7425 varEnd, RegState::Define).addConstantPoolIndex(Idx));
7427 AddDefaultPred(BuildMI(*BB, MI, dl, TII->get(ARM::LDRcp)).addReg(
7428 varEnd, RegState::Define).addConstantPoolIndex(Idx).addImm(0));
7430 BB->addSuccessor(loopMBB);
7432 // Generate the loop body:
7433 // varPhi = PHI(varLoop, varEnd)
7434 // srcPhi = PHI(srcLoop, src)
7435 // destPhi = PHI(destLoop, dst)
7436 MachineBasicBlock *entryBB = BB;
7438 unsigned varLoop = MRI.createVirtualRegister(TRC);
7439 unsigned varPhi = MRI.createVirtualRegister(TRC);
7440 unsigned srcLoop = MRI.createVirtualRegister(TRC);
7441 unsigned srcPhi = MRI.createVirtualRegister(TRC);
7442 unsigned destLoop = MRI.createVirtualRegister(TRC);
7443 unsigned destPhi = MRI.createVirtualRegister(TRC);
7445 BuildMI(*BB, BB->begin(), dl, TII->get(ARM::PHI), varPhi)
7446 .addReg(varLoop).addMBB(loopMBB)
7447 .addReg(varEnd).addMBB(entryBB);
7448 BuildMI(BB, dl, TII->get(ARM::PHI), srcPhi)
7449 .addReg(srcLoop).addMBB(loopMBB)
7450 .addReg(src).addMBB(entryBB);
7451 BuildMI(BB, dl, TII->get(ARM::PHI), destPhi)
7452 .addReg(destLoop).addMBB(loopMBB)
7453 .addReg(dest).addMBB(entryBB);
7455 // [scratch, srcLoop] = LDR_POST(srcPhi, UnitSize)
7456 // [destLoop] = STR_POST(scratch, destPhi, UnitSiz)
7457 unsigned scratch = MRI.createVirtualRegister(IsNeon ? VecTRC : TRC);
7458 emitPostLd(BB, BB->end(), TII, dl, UnitSize, scratch, srcPhi, srcLoop,
7459 IsThumb1, IsThumb2);
7460 emitPostSt(BB, BB->end(), TII, dl, UnitSize, scratch, destPhi, destLoop,
7461 IsThumb1, IsThumb2);
7463 // Decrement loop variable by UnitSize.
7465 MachineInstrBuilder MIB =
7466 BuildMI(*BB, BB->end(), dl, TII->get(ARM::tSUBi8), varLoop);
7467 MIB = AddDefaultT1CC(MIB);
7468 MIB.addReg(varPhi).addImm(UnitSize);
7469 AddDefaultPred(MIB);
7471 MachineInstrBuilder MIB =
7472 BuildMI(*BB, BB->end(), dl,
7473 TII->get(IsThumb2 ? ARM::t2SUBri : ARM::SUBri), varLoop);
7474 AddDefaultCC(AddDefaultPred(MIB.addReg(varPhi).addImm(UnitSize)));
7475 MIB->getOperand(5).setReg(ARM::CPSR);
7476 MIB->getOperand(5).setIsDef(true);
7478 BuildMI(*BB, BB->end(), dl,
7479 TII->get(IsThumb1 ? ARM::tBcc : IsThumb2 ? ARM::t2Bcc : ARM::Bcc))
7480 .addMBB(loopMBB).addImm(ARMCC::NE).addReg(ARM::CPSR);
7482 // loopMBB can loop back to loopMBB or fall through to exitMBB.
7483 BB->addSuccessor(loopMBB);
7484 BB->addSuccessor(exitMBB);
7486 // Add epilogue to handle BytesLeft.
7488 MachineInstr *StartOfExit = exitMBB->begin();
7490 // [scratch, srcOut] = LDRB_POST(srcLoop, 1)
7491 // [destOut] = STRB_POST(scratch, destLoop, 1)
7492 unsigned srcIn = srcLoop;
7493 unsigned destIn = destLoop;
7494 for (unsigned i = 0; i < BytesLeft; i++) {
7495 unsigned srcOut = MRI.createVirtualRegister(TRC);
7496 unsigned destOut = MRI.createVirtualRegister(TRC);
7497 unsigned scratch = MRI.createVirtualRegister(TRC);
7498 emitPostLd(BB, StartOfExit, TII, dl, 1, scratch, srcIn, srcOut,
7499 IsThumb1, IsThumb2);
7500 emitPostSt(BB, StartOfExit, TII, dl, 1, scratch, destIn, destOut,
7501 IsThumb1, IsThumb2);
7506 MI->eraseFromParent(); // The instruction is gone now.
7511 ARMTargetLowering::EmitLowered__chkstk(MachineInstr *MI,
7512 MachineBasicBlock *MBB) const {
7513 const TargetMachine &TM = getTargetMachine();
7514 const TargetInstrInfo &TII = *Subtarget->getInstrInfo();
7515 DebugLoc DL = MI->getDebugLoc();
7517 assert(Subtarget->isTargetWindows() &&
7518 "__chkstk is only supported on Windows");
7519 assert(Subtarget->isThumb2() && "Windows on ARM requires Thumb-2 mode");
7521 // __chkstk takes the number of words to allocate on the stack in R4, and
7522 // returns the stack adjustment in number of bytes in R4. This will not
7523 // clober any other registers (other than the obvious lr).
7525 // Although, technically, IP should be considered a register which may be
7526 // clobbered, the call itself will not touch it. Windows on ARM is a pure
7527 // thumb-2 environment, so there is no interworking required. As a result, we
7528 // do not expect a veneer to be emitted by the linker, clobbering IP.
7530 // Each module receives its own copy of __chkstk, so no import thunk is
7531 // required, again, ensuring that IP is not clobbered.
7533 // Finally, although some linkers may theoretically provide a trampoline for
7534 // out of range calls (which is quite common due to a 32M range limitation of
7535 // branches for Thumb), we can generate the long-call version via
7536 // -mcmodel=large, alleviating the need for the trampoline which may clobber
7539 switch (TM.getCodeModel()) {
7540 case CodeModel::Small:
7541 case CodeModel::Medium:
7542 case CodeModel::Default:
7543 case CodeModel::Kernel:
7544 BuildMI(*MBB, MI, DL, TII.get(ARM::tBL))
7545 .addImm((unsigned)ARMCC::AL).addReg(0)
7546 .addExternalSymbol("__chkstk")
7547 .addReg(ARM::R4, RegState::Implicit | RegState::Kill)
7548 .addReg(ARM::R4, RegState::Implicit | RegState::Define)
7549 .addReg(ARM::R12, RegState::Implicit | RegState::Define | RegState::Dead);
7551 case CodeModel::Large:
7552 case CodeModel::JITDefault: {
7553 MachineRegisterInfo &MRI = MBB->getParent()->getRegInfo();
7554 unsigned Reg = MRI.createVirtualRegister(&ARM::rGPRRegClass);
7556 BuildMI(*MBB, MI, DL, TII.get(ARM::t2MOVi32imm), Reg)
7557 .addExternalSymbol("__chkstk");
7558 BuildMI(*MBB, MI, DL, TII.get(ARM::tBLXr))
7559 .addImm((unsigned)ARMCC::AL).addReg(0)
7560 .addReg(Reg, RegState::Kill)
7561 .addReg(ARM::R4, RegState::Implicit | RegState::Kill)
7562 .addReg(ARM::R4, RegState::Implicit | RegState::Define)
7563 .addReg(ARM::R12, RegState::Implicit | RegState::Define | RegState::Dead);
7568 AddDefaultCC(AddDefaultPred(BuildMI(*MBB, MI, DL, TII.get(ARM::t2SUBrr),
7570 .addReg(ARM::SP).addReg(ARM::R4)));
7572 MI->eraseFromParent();
7577 ARMTargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
7578 MachineBasicBlock *BB) const {
7579 const TargetInstrInfo *TII = Subtarget->getInstrInfo();
7580 DebugLoc dl = MI->getDebugLoc();
7581 bool isThumb2 = Subtarget->isThumb2();
7582 switch (MI->getOpcode()) {
7585 llvm_unreachable("Unexpected instr type to insert");
7587 // The Thumb2 pre-indexed stores have the same MI operands, they just
7588 // define them differently in the .td files from the isel patterns, so
7589 // they need pseudos.
7590 case ARM::t2STR_preidx:
7591 MI->setDesc(TII->get(ARM::t2STR_PRE));
7593 case ARM::t2STRB_preidx:
7594 MI->setDesc(TII->get(ARM::t2STRB_PRE));
7596 case ARM::t2STRH_preidx:
7597 MI->setDesc(TII->get(ARM::t2STRH_PRE));
7600 case ARM::STRi_preidx:
7601 case ARM::STRBi_preidx: {
7602 unsigned NewOpc = MI->getOpcode() == ARM::STRi_preidx ?
7603 ARM::STR_PRE_IMM : ARM::STRB_PRE_IMM;
7604 // Decode the offset.
7605 unsigned Offset = MI->getOperand(4).getImm();
7606 bool isSub = ARM_AM::getAM2Op(Offset) == ARM_AM::sub;
7607 Offset = ARM_AM::getAM2Offset(Offset);
7611 MachineMemOperand *MMO = *MI->memoperands_begin();
7612 BuildMI(*BB, MI, dl, TII->get(NewOpc))
7613 .addOperand(MI->getOperand(0)) // Rn_wb
7614 .addOperand(MI->getOperand(1)) // Rt
7615 .addOperand(MI->getOperand(2)) // Rn
7616 .addImm(Offset) // offset (skip GPR==zero_reg)
7617 .addOperand(MI->getOperand(5)) // pred
7618 .addOperand(MI->getOperand(6))
7619 .addMemOperand(MMO);
7620 MI->eraseFromParent();
7623 case ARM::STRr_preidx:
7624 case ARM::STRBr_preidx:
7625 case ARM::STRH_preidx: {
7627 switch (MI->getOpcode()) {
7628 default: llvm_unreachable("unexpected opcode!");
7629 case ARM::STRr_preidx: NewOpc = ARM::STR_PRE_REG; break;
7630 case ARM::STRBr_preidx: NewOpc = ARM::STRB_PRE_REG; break;
7631 case ARM::STRH_preidx: NewOpc = ARM::STRH_PRE; break;
7633 MachineInstrBuilder MIB = BuildMI(*BB, MI, dl, TII->get(NewOpc));
7634 for (unsigned i = 0; i < MI->getNumOperands(); ++i)
7635 MIB.addOperand(MI->getOperand(i));
7636 MI->eraseFromParent();
7640 case ARM::tMOVCCr_pseudo: {
7641 // To "insert" a SELECT_CC instruction, we actually have to insert the
7642 // diamond control-flow pattern. The incoming instruction knows the
7643 // destination vreg to set, the condition code register to branch on, the
7644 // true/false values to select between, and a branch opcode to use.
7645 const BasicBlock *LLVM_BB = BB->getBasicBlock();
7646 MachineFunction::iterator It = BB;
7652 // cmpTY ccX, r1, r2
7654 // fallthrough --> copy0MBB
7655 MachineBasicBlock *thisMBB = BB;
7656 MachineFunction *F = BB->getParent();
7657 MachineBasicBlock *copy0MBB = F->CreateMachineBasicBlock(LLVM_BB);
7658 MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);
7659 F->insert(It, copy0MBB);
7660 F->insert(It, sinkMBB);
7662 // Transfer the remainder of BB and its successor edges to sinkMBB.
7663 sinkMBB->splice(sinkMBB->begin(), BB,
7664 std::next(MachineBasicBlock::iterator(MI)), BB->end());
7665 sinkMBB->transferSuccessorsAndUpdatePHIs(BB);
7667 BB->addSuccessor(copy0MBB);
7668 BB->addSuccessor(sinkMBB);
7670 BuildMI(BB, dl, TII->get(ARM::tBcc)).addMBB(sinkMBB)
7671 .addImm(MI->getOperand(3).getImm()).addReg(MI->getOperand(4).getReg());
7674 // %FalseValue = ...
7675 // # fallthrough to sinkMBB
7678 // Update machine-CFG edges
7679 BB->addSuccessor(sinkMBB);
7682 // %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
7685 BuildMI(*BB, BB->begin(), dl,
7686 TII->get(ARM::PHI), MI->getOperand(0).getReg())
7687 .addReg(MI->getOperand(1).getReg()).addMBB(copy0MBB)
7688 .addReg(MI->getOperand(2).getReg()).addMBB(thisMBB);
7690 MI->eraseFromParent(); // The pseudo instruction is gone now.
7695 case ARM::BCCZi64: {
7696 // If there is an unconditional branch to the other successor, remove it.
7697 BB->erase(std::next(MachineBasicBlock::iterator(MI)), BB->end());
7699 // Compare both parts that make up the double comparison separately for
7701 bool RHSisZero = MI->getOpcode() == ARM::BCCZi64;
7703 unsigned LHS1 = MI->getOperand(1).getReg();
7704 unsigned LHS2 = MI->getOperand(2).getReg();
7706 AddDefaultPred(BuildMI(BB, dl,
7707 TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
7708 .addReg(LHS1).addImm(0));
7709 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
7710 .addReg(LHS2).addImm(0)
7711 .addImm(ARMCC::EQ).addReg(ARM::CPSR);
7713 unsigned RHS1 = MI->getOperand(3).getReg();
7714 unsigned RHS2 = MI->getOperand(4).getReg();
7715 AddDefaultPred(BuildMI(BB, dl,
7716 TII->get(isThumb2 ? ARM::t2CMPrr : ARM::CMPrr))
7717 .addReg(LHS1).addReg(RHS1));
7718 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPrr : ARM::CMPrr))
7719 .addReg(LHS2).addReg(RHS2)
7720 .addImm(ARMCC::EQ).addReg(ARM::CPSR);
7723 MachineBasicBlock *destMBB = MI->getOperand(RHSisZero ? 3 : 5).getMBB();
7724 MachineBasicBlock *exitMBB = OtherSucc(BB, destMBB);
7725 if (MI->getOperand(0).getImm() == ARMCC::NE)
7726 std::swap(destMBB, exitMBB);
7728 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
7729 .addMBB(destMBB).addImm(ARMCC::EQ).addReg(ARM::CPSR);
7731 AddDefaultPred(BuildMI(BB, dl, TII->get(ARM::t2B)).addMBB(exitMBB));
7733 BuildMI(BB, dl, TII->get(ARM::B)) .addMBB(exitMBB);
7735 MI->eraseFromParent(); // The pseudo instruction is gone now.
7739 case ARM::Int_eh_sjlj_setjmp:
7740 case ARM::Int_eh_sjlj_setjmp_nofp:
7741 case ARM::tInt_eh_sjlj_setjmp:
7742 case ARM::t2Int_eh_sjlj_setjmp:
7743 case ARM::t2Int_eh_sjlj_setjmp_nofp:
7744 EmitSjLjDispatchBlock(MI, BB);
7749 // To insert an ABS instruction, we have to insert the
7750 // diamond control-flow pattern. The incoming instruction knows the
7751 // source vreg to test against 0, the destination vreg to set,
7752 // the condition code register to branch on, the
7753 // true/false values to select between, and a branch opcode to use.
7758 // BCC (branch to SinkBB if V0 >= 0)
7759 // RSBBB: V3 = RSBri V2, 0 (compute ABS if V2 < 0)
7760 // SinkBB: V1 = PHI(V2, V3)
7761 const BasicBlock *LLVM_BB = BB->getBasicBlock();
7762 MachineFunction::iterator BBI = BB;
7764 MachineFunction *Fn = BB->getParent();
7765 MachineBasicBlock *RSBBB = Fn->CreateMachineBasicBlock(LLVM_BB);
7766 MachineBasicBlock *SinkBB = Fn->CreateMachineBasicBlock(LLVM_BB);
7767 Fn->insert(BBI, RSBBB);
7768 Fn->insert(BBI, SinkBB);
7770 unsigned int ABSSrcReg = MI->getOperand(1).getReg();
7771 unsigned int ABSDstReg = MI->getOperand(0).getReg();
7772 bool ABSSrcKIll = MI->getOperand(1).isKill();
7773 bool isThumb2 = Subtarget->isThumb2();
7774 MachineRegisterInfo &MRI = Fn->getRegInfo();
7775 // In Thumb mode S must not be specified if source register is the SP or
7776 // PC and if destination register is the SP, so restrict register class
7777 unsigned NewRsbDstReg =
7778 MRI.createVirtualRegister(isThumb2 ? &ARM::rGPRRegClass : &ARM::GPRRegClass);
7780 // Transfer the remainder of BB and its successor edges to sinkMBB.
7781 SinkBB->splice(SinkBB->begin(), BB,
7782 std::next(MachineBasicBlock::iterator(MI)), BB->end());
7783 SinkBB->transferSuccessorsAndUpdatePHIs(BB);
7785 BB->addSuccessor(RSBBB);
7786 BB->addSuccessor(SinkBB);
7788 // fall through to SinkMBB
7789 RSBBB->addSuccessor(SinkBB);
7791 // insert a cmp at the end of BB
7792 AddDefaultPred(BuildMI(BB, dl,
7793 TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
7794 .addReg(ABSSrcReg).addImm(0));
7796 // insert a bcc with opposite CC to ARMCC::MI at the end of BB
7798 TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc)).addMBB(SinkBB)
7799 .addImm(ARMCC::getOppositeCondition(ARMCC::MI)).addReg(ARM::CPSR);
7801 // insert rsbri in RSBBB
7802 // Note: BCC and rsbri will be converted into predicated rsbmi
7803 // by if-conversion pass
7804 BuildMI(*RSBBB, RSBBB->begin(), dl,
7805 TII->get(isThumb2 ? ARM::t2RSBri : ARM::RSBri), NewRsbDstReg)
7806 .addReg(ABSSrcReg, ABSSrcKIll ? RegState::Kill : 0)
7807 .addImm(0).addImm((unsigned)ARMCC::AL).addReg(0).addReg(0);
7809 // insert PHI in SinkBB,
7810 // reuse ABSDstReg to not change uses of ABS instruction
7811 BuildMI(*SinkBB, SinkBB->begin(), dl,
7812 TII->get(ARM::PHI), ABSDstReg)
7813 .addReg(NewRsbDstReg).addMBB(RSBBB)
7814 .addReg(ABSSrcReg).addMBB(BB);
7816 // remove ABS instruction
7817 MI->eraseFromParent();
7819 // return last added BB
7822 case ARM::COPY_STRUCT_BYVAL_I32:
7824 return EmitStructByval(MI, BB);
7825 case ARM::WIN__CHKSTK:
7826 return EmitLowered__chkstk(MI, BB);
7830 void ARMTargetLowering::AdjustInstrPostInstrSelection(MachineInstr *MI,
7831 SDNode *Node) const {
7832 const MCInstrDesc *MCID = &MI->getDesc();
7833 // Adjust potentially 's' setting instructions after isel, i.e. ADC, SBC, RSB,
7834 // RSC. Coming out of isel, they have an implicit CPSR def, but the optional
7835 // operand is still set to noreg. If needed, set the optional operand's
7836 // register to CPSR, and remove the redundant implicit def.
7838 // e.g. ADCS (..., CPSR<imp-def>) -> ADC (... opt:CPSR<def>).
7840 // Rename pseudo opcodes.
7841 unsigned NewOpc = convertAddSubFlagsOpcode(MI->getOpcode());
7843 const ARMBaseInstrInfo *TII = Subtarget->getInstrInfo();
7844 MCID = &TII->get(NewOpc);
7846 assert(MCID->getNumOperands() == MI->getDesc().getNumOperands() + 1 &&
7847 "converted opcode should be the same except for cc_out");
7851 // Add the optional cc_out operand
7852 MI->addOperand(MachineOperand::CreateReg(0, /*isDef=*/true));
7854 unsigned ccOutIdx = MCID->getNumOperands() - 1;
7856 // Any ARM instruction that sets the 's' bit should specify an optional
7857 // "cc_out" operand in the last operand position.
7858 if (!MI->hasOptionalDef() || !MCID->OpInfo[ccOutIdx].isOptionalDef()) {
7859 assert(!NewOpc && "Optional cc_out operand required");
7862 // Look for an implicit def of CPSR added by MachineInstr ctor. Remove it
7863 // since we already have an optional CPSR def.
7864 bool definesCPSR = false;
7865 bool deadCPSR = false;
7866 for (unsigned i = MCID->getNumOperands(), e = MI->getNumOperands();
7868 const MachineOperand &MO = MI->getOperand(i);
7869 if (MO.isReg() && MO.isDef() && MO.getReg() == ARM::CPSR) {
7873 MI->RemoveOperand(i);
7878 assert(!NewOpc && "Optional cc_out operand required");
7881 assert(deadCPSR == !Node->hasAnyUseOfValue(1) && "inconsistent dead flag");
7883 assert(!MI->getOperand(ccOutIdx).getReg() &&
7884 "expect uninitialized optional cc_out operand");
7888 // If this instruction was defined with an optional CPSR def and its dag node
7889 // had a live implicit CPSR def, then activate the optional CPSR def.
7890 MachineOperand &MO = MI->getOperand(ccOutIdx);
7891 MO.setReg(ARM::CPSR);
7895 //===----------------------------------------------------------------------===//
7896 // ARM Optimization Hooks
7897 //===----------------------------------------------------------------------===//
7899 // Helper function that checks if N is a null or all ones constant.
7900 static inline bool isZeroOrAllOnes(SDValue N, bool AllOnes) {
7901 ConstantSDNode *C = dyn_cast<ConstantSDNode>(N);
7904 return AllOnes ? C->isAllOnesValue() : C->isNullValue();
7907 // Return true if N is conditionally 0 or all ones.
7908 // Detects these expressions where cc is an i1 value:
7910 // (select cc 0, y) [AllOnes=0]
7911 // (select cc y, 0) [AllOnes=0]
7912 // (zext cc) [AllOnes=0]
7913 // (sext cc) [AllOnes=0/1]
7914 // (select cc -1, y) [AllOnes=1]
7915 // (select cc y, -1) [AllOnes=1]
7917 // Invert is set when N is the null/all ones constant when CC is false.
7918 // OtherOp is set to the alternative value of N.
7919 static bool isConditionalZeroOrAllOnes(SDNode *N, bool AllOnes,
7920 SDValue &CC, bool &Invert,
7922 SelectionDAG &DAG) {
7923 switch (N->getOpcode()) {
7924 default: return false;
7926 CC = N->getOperand(0);
7927 SDValue N1 = N->getOperand(1);
7928 SDValue N2 = N->getOperand(2);
7929 if (isZeroOrAllOnes(N1, AllOnes)) {
7934 if (isZeroOrAllOnes(N2, AllOnes)) {
7941 case ISD::ZERO_EXTEND:
7942 // (zext cc) can never be the all ones value.
7946 case ISD::SIGN_EXTEND: {
7948 EVT VT = N->getValueType(0);
7949 CC = N->getOperand(0);
7950 if (CC.getValueType() != MVT::i1)
7954 // When looking for an AllOnes constant, N is an sext, and the 'other'
7956 OtherOp = DAG.getConstant(0, dl, VT);
7957 else if (N->getOpcode() == ISD::ZERO_EXTEND)
7958 // When looking for a 0 constant, N can be zext or sext.
7959 OtherOp = DAG.getConstant(1, dl, VT);
7961 OtherOp = DAG.getConstant(APInt::getAllOnesValue(VT.getSizeInBits()), dl,
7968 // Combine a constant select operand into its use:
7970 // (add (select cc, 0, c), x) -> (select cc, x, (add, x, c))
7971 // (sub x, (select cc, 0, c)) -> (select cc, x, (sub, x, c))
7972 // (and (select cc, -1, c), x) -> (select cc, x, (and, x, c)) [AllOnes=1]
7973 // (or (select cc, 0, c), x) -> (select cc, x, (or, x, c))
7974 // (xor (select cc, 0, c), x) -> (select cc, x, (xor, x, c))
7976 // The transform is rejected if the select doesn't have a constant operand that
7977 // is null, or all ones when AllOnes is set.
7979 // Also recognize sext/zext from i1:
7981 // (add (zext cc), x) -> (select cc (add x, 1), x)
7982 // (add (sext cc), x) -> (select cc (add x, -1), x)
7984 // These transformations eventually create predicated instructions.
7986 // @param N The node to transform.
7987 // @param Slct The N operand that is a select.
7988 // @param OtherOp The other N operand (x above).
7989 // @param DCI Context.
7990 // @param AllOnes Require the select constant to be all ones instead of null.
7991 // @returns The new node, or SDValue() on failure.
7993 SDValue combineSelectAndUse(SDNode *N, SDValue Slct, SDValue OtherOp,
7994 TargetLowering::DAGCombinerInfo &DCI,
7995 bool AllOnes = false) {
7996 SelectionDAG &DAG = DCI.DAG;
7997 EVT VT = N->getValueType(0);
7998 SDValue NonConstantVal;
8001 if (!isConditionalZeroOrAllOnes(Slct.getNode(), AllOnes, CCOp, SwapSelectOps,
8002 NonConstantVal, DAG))
8005 // Slct is now know to be the desired identity constant when CC is true.
8006 SDValue TrueVal = OtherOp;
8007 SDValue FalseVal = DAG.getNode(N->getOpcode(), SDLoc(N), VT,
8008 OtherOp, NonConstantVal);
8009 // Unless SwapSelectOps says CC should be false.
8011 std::swap(TrueVal, FalseVal);
8013 return DAG.getNode(ISD::SELECT, SDLoc(N), VT,
8014 CCOp, TrueVal, FalseVal);
8017 // Attempt combineSelectAndUse on each operand of a commutative operator N.
8019 SDValue combineSelectAndUseCommutative(SDNode *N, bool AllOnes,
8020 TargetLowering::DAGCombinerInfo &DCI) {
8021 SDValue N0 = N->getOperand(0);
8022 SDValue N1 = N->getOperand(1);
8023 if (N0.getNode()->hasOneUse()) {
8024 SDValue Result = combineSelectAndUse(N, N0, N1, DCI, AllOnes);
8025 if (Result.getNode())
8028 if (N1.getNode()->hasOneUse()) {
8029 SDValue Result = combineSelectAndUse(N, N1, N0, DCI, AllOnes);
8030 if (Result.getNode())
8036 // AddCombineToVPADDL- For pair-wise add on neon, use the vpaddl instruction
8037 // (only after legalization).
8038 static SDValue AddCombineToVPADDL(SDNode *N, SDValue N0, SDValue N1,
8039 TargetLowering::DAGCombinerInfo &DCI,
8040 const ARMSubtarget *Subtarget) {
8042 // Only perform optimization if after legalize, and if NEON is available. We
8043 // also expected both operands to be BUILD_VECTORs.
8044 if (DCI.isBeforeLegalize() || !Subtarget->hasNEON()
8045 || N0.getOpcode() != ISD::BUILD_VECTOR
8046 || N1.getOpcode() != ISD::BUILD_VECTOR)
8049 // Check output type since VPADDL operand elements can only be 8, 16, or 32.
8050 EVT VT = N->getValueType(0);
8051 if (!VT.isInteger() || VT.getVectorElementType() == MVT::i64)
8054 // Check that the vector operands are of the right form.
8055 // N0 and N1 are BUILD_VECTOR nodes with N number of EXTRACT_VECTOR
8056 // operands, where N is the size of the formed vector.
8057 // Each EXTRACT_VECTOR should have the same input vector and odd or even
8058 // index such that we have a pair wise add pattern.
8060 // Grab the vector that all EXTRACT_VECTOR nodes should be referencing.
8061 if (N0->getOperand(0)->getOpcode() != ISD::EXTRACT_VECTOR_ELT)
8063 SDValue Vec = N0->getOperand(0)->getOperand(0);
8064 SDNode *V = Vec.getNode();
8065 unsigned nextIndex = 0;
8067 // For each operands to the ADD which are BUILD_VECTORs,
8068 // check to see if each of their operands are an EXTRACT_VECTOR with
8069 // the same vector and appropriate index.
8070 for (unsigned i = 0, e = N0->getNumOperands(); i != e; ++i) {
8071 if (N0->getOperand(i)->getOpcode() == ISD::EXTRACT_VECTOR_ELT
8072 && N1->getOperand(i)->getOpcode() == ISD::EXTRACT_VECTOR_ELT) {
8074 SDValue ExtVec0 = N0->getOperand(i);
8075 SDValue ExtVec1 = N1->getOperand(i);
8077 // First operand is the vector, verify its the same.
8078 if (V != ExtVec0->getOperand(0).getNode() ||
8079 V != ExtVec1->getOperand(0).getNode())
8082 // Second is the constant, verify its correct.
8083 ConstantSDNode *C0 = dyn_cast<ConstantSDNode>(ExtVec0->getOperand(1));
8084 ConstantSDNode *C1 = dyn_cast<ConstantSDNode>(ExtVec1->getOperand(1));
8086 // For the constant, we want to see all the even or all the odd.
8087 if (!C0 || !C1 || C0->getZExtValue() != nextIndex
8088 || C1->getZExtValue() != nextIndex+1)
8097 // Create VPADDL node.
8098 SelectionDAG &DAG = DCI.DAG;
8099 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
8103 // Build operand list.
8104 SmallVector<SDValue, 8> Ops;
8105 Ops.push_back(DAG.getConstant(Intrinsic::arm_neon_vpaddls, dl,
8106 TLI.getPointerTy(DAG.getDataLayout())));
8108 // Input is the vector.
8111 // Get widened type and narrowed type.
8113 unsigned numElem = VT.getVectorNumElements();
8115 EVT inputLaneType = Vec.getValueType().getVectorElementType();
8116 switch (inputLaneType.getSimpleVT().SimpleTy) {
8117 case MVT::i8: widenType = MVT::getVectorVT(MVT::i16, numElem); break;
8118 case MVT::i16: widenType = MVT::getVectorVT(MVT::i32, numElem); break;
8119 case MVT::i32: widenType = MVT::getVectorVT(MVT::i64, numElem); break;
8121 llvm_unreachable("Invalid vector element type for padd optimization.");
8124 SDValue tmp = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, widenType, Ops);
8125 unsigned ExtOp = VT.bitsGT(tmp.getValueType()) ? ISD::ANY_EXTEND : ISD::TRUNCATE;
8126 return DAG.getNode(ExtOp, dl, VT, tmp);
8129 static SDValue findMUL_LOHI(SDValue V) {
8130 if (V->getOpcode() == ISD::UMUL_LOHI ||
8131 V->getOpcode() == ISD::SMUL_LOHI)
8136 static SDValue AddCombineTo64bitMLAL(SDNode *AddcNode,
8137 TargetLowering::DAGCombinerInfo &DCI,
8138 const ARMSubtarget *Subtarget) {
8140 if (Subtarget->isThumb1Only()) return SDValue();
8142 // Only perform the checks after legalize when the pattern is available.
8143 if (DCI.isBeforeLegalize()) return SDValue();
8145 // Look for multiply add opportunities.
8146 // The pattern is a ISD::UMUL_LOHI followed by two add nodes, where
8147 // each add nodes consumes a value from ISD::UMUL_LOHI and there is
8148 // a glue link from the first add to the second add.
8149 // If we find this pattern, we can replace the U/SMUL_LOHI, ADDC, and ADDE by
8150 // a S/UMLAL instruction.
8153 // / \ [no multiline comment]
8159 assert(AddcNode->getOpcode() == ISD::ADDC && "Expect an ADDC");
8160 SDValue AddcOp0 = AddcNode->getOperand(0);
8161 SDValue AddcOp1 = AddcNode->getOperand(1);
8163 // Check if the two operands are from the same mul_lohi node.
8164 if (AddcOp0.getNode() == AddcOp1.getNode())
8167 assert(AddcNode->getNumValues() == 2 &&
8168 AddcNode->getValueType(0) == MVT::i32 &&
8169 "Expect ADDC with two result values. First: i32");
8171 // Check that we have a glued ADDC node.
8172 if (AddcNode->getValueType(1) != MVT::Glue)
8175 // Check that the ADDC adds the low result of the S/UMUL_LOHI.
8176 if (AddcOp0->getOpcode() != ISD::UMUL_LOHI &&
8177 AddcOp0->getOpcode() != ISD::SMUL_LOHI &&
8178 AddcOp1->getOpcode() != ISD::UMUL_LOHI &&
8179 AddcOp1->getOpcode() != ISD::SMUL_LOHI)
8182 // Look for the glued ADDE.
8183 SDNode* AddeNode = AddcNode->getGluedUser();
8187 // Make sure it is really an ADDE.
8188 if (AddeNode->getOpcode() != ISD::ADDE)
8191 assert(AddeNode->getNumOperands() == 3 &&
8192 AddeNode->getOperand(2).getValueType() == MVT::Glue &&
8193 "ADDE node has the wrong inputs");
8195 // Check for the triangle shape.
8196 SDValue AddeOp0 = AddeNode->getOperand(0);
8197 SDValue AddeOp1 = AddeNode->getOperand(1);
8199 // Make sure that the ADDE operands are not coming from the same node.
8200 if (AddeOp0.getNode() == AddeOp1.getNode())
8203 // Find the MUL_LOHI node walking up ADDE's operands.
8204 bool IsLeftOperandMUL = false;
8205 SDValue MULOp = findMUL_LOHI(AddeOp0);
8206 if (MULOp == SDValue())
8207 MULOp = findMUL_LOHI(AddeOp1);
8209 IsLeftOperandMUL = true;
8210 if (MULOp == SDValue())
8213 // Figure out the right opcode.
8214 unsigned Opc = MULOp->getOpcode();
8215 unsigned FinalOpc = (Opc == ISD::SMUL_LOHI) ? ARMISD::SMLAL : ARMISD::UMLAL;
8217 // Figure out the high and low input values to the MLAL node.
8218 SDValue* HiAdd = nullptr;
8219 SDValue* LoMul = nullptr;
8220 SDValue* LowAdd = nullptr;
8222 // Ensure that ADDE is from high result of ISD::SMUL_LOHI.
8223 if ((AddeOp0 != MULOp.getValue(1)) && (AddeOp1 != MULOp.getValue(1)))
8226 if (IsLeftOperandMUL)
8232 // Ensure that LoMul and LowAdd are taken from correct ISD::SMUL_LOHI node
8233 // whose low result is fed to the ADDC we are checking.
8235 if (AddcOp0 == MULOp.getValue(0)) {
8239 if (AddcOp1 == MULOp.getValue(0)) {
8247 // Create the merged node.
8248 SelectionDAG &DAG = DCI.DAG;
8250 // Build operand list.
8251 SmallVector<SDValue, 8> Ops;
8252 Ops.push_back(LoMul->getOperand(0));
8253 Ops.push_back(LoMul->getOperand(1));
8254 Ops.push_back(*LowAdd);
8255 Ops.push_back(*HiAdd);
8257 SDValue MLALNode = DAG.getNode(FinalOpc, SDLoc(AddcNode),
8258 DAG.getVTList(MVT::i32, MVT::i32), Ops);
8260 // Replace the ADDs' nodes uses by the MLA node's values.
8261 SDValue HiMLALResult(MLALNode.getNode(), 1);
8262 DAG.ReplaceAllUsesOfValueWith(SDValue(AddeNode, 0), HiMLALResult);
8264 SDValue LoMLALResult(MLALNode.getNode(), 0);
8265 DAG.ReplaceAllUsesOfValueWith(SDValue(AddcNode, 0), LoMLALResult);
8267 // Return original node to notify the driver to stop replacing.
8268 SDValue resNode(AddcNode, 0);
8272 /// PerformADDCCombine - Target-specific dag combine transform from
8273 /// ISD::ADDC, ISD::ADDE, and ISD::MUL_LOHI to MLAL.
8274 static SDValue PerformADDCCombine(SDNode *N,
8275 TargetLowering::DAGCombinerInfo &DCI,
8276 const ARMSubtarget *Subtarget) {
8278 return AddCombineTo64bitMLAL(N, DCI, Subtarget);
8282 /// PerformADDCombineWithOperands - Try DAG combinations for an ADD with
8283 /// operands N0 and N1. This is a helper for PerformADDCombine that is
8284 /// called with the default operands, and if that fails, with commuted
8286 static SDValue PerformADDCombineWithOperands(SDNode *N, SDValue N0, SDValue N1,
8287 TargetLowering::DAGCombinerInfo &DCI,
8288 const ARMSubtarget *Subtarget){
8290 // Attempt to create vpaddl for this add.
8291 SDValue Result = AddCombineToVPADDL(N, N0, N1, DCI, Subtarget);
8292 if (Result.getNode())
8295 // fold (add (select cc, 0, c), x) -> (select cc, x, (add, x, c))
8296 if (N0.getNode()->hasOneUse()) {
8297 SDValue Result = combineSelectAndUse(N, N0, N1, DCI);
8298 if (Result.getNode()) return Result;
8303 /// PerformADDCombine - Target-specific dag combine xforms for ISD::ADD.
8305 static SDValue PerformADDCombine(SDNode *N,
8306 TargetLowering::DAGCombinerInfo &DCI,
8307 const ARMSubtarget *Subtarget) {
8308 SDValue N0 = N->getOperand(0);
8309 SDValue N1 = N->getOperand(1);
8311 // First try with the default operand order.
8312 SDValue Result = PerformADDCombineWithOperands(N, N0, N1, DCI, Subtarget);
8313 if (Result.getNode())
8316 // If that didn't work, try again with the operands commuted.
8317 return PerformADDCombineWithOperands(N, N1, N0, DCI, Subtarget);
8320 /// PerformSUBCombine - Target-specific dag combine xforms for ISD::SUB.
8322 static SDValue PerformSUBCombine(SDNode *N,
8323 TargetLowering::DAGCombinerInfo &DCI) {
8324 SDValue N0 = N->getOperand(0);
8325 SDValue N1 = N->getOperand(1);
8327 // fold (sub x, (select cc, 0, c)) -> (select cc, x, (sub, x, c))
8328 if (N1.getNode()->hasOneUse()) {
8329 SDValue Result = combineSelectAndUse(N, N1, N0, DCI);
8330 if (Result.getNode()) return Result;
8336 /// PerformVMULCombine
8337 /// Distribute (A + B) * C to (A * C) + (B * C) to take advantage of the
8338 /// special multiplier accumulator forwarding.
8344 // However, for (A + B) * (A + B),
8351 static SDValue PerformVMULCombine(SDNode *N,
8352 TargetLowering::DAGCombinerInfo &DCI,
8353 const ARMSubtarget *Subtarget) {
8354 if (!Subtarget->hasVMLxForwarding())
8357 SelectionDAG &DAG = DCI.DAG;
8358 SDValue N0 = N->getOperand(0);
8359 SDValue N1 = N->getOperand(1);
8360 unsigned Opcode = N0.getOpcode();
8361 if (Opcode != ISD::ADD && Opcode != ISD::SUB &&
8362 Opcode != ISD::FADD && Opcode != ISD::FSUB) {
8363 Opcode = N1.getOpcode();
8364 if (Opcode != ISD::ADD && Opcode != ISD::SUB &&
8365 Opcode != ISD::FADD && Opcode != ISD::FSUB)
8373 EVT VT = N->getValueType(0);
8375 SDValue N00 = N0->getOperand(0);
8376 SDValue N01 = N0->getOperand(1);
8377 return DAG.getNode(Opcode, DL, VT,
8378 DAG.getNode(ISD::MUL, DL, VT, N00, N1),
8379 DAG.getNode(ISD::MUL, DL, VT, N01, N1));
8382 static SDValue PerformMULCombine(SDNode *N,
8383 TargetLowering::DAGCombinerInfo &DCI,
8384 const ARMSubtarget *Subtarget) {
8385 SelectionDAG &DAG = DCI.DAG;
8387 if (Subtarget->isThumb1Only())
8390 if (DCI.isBeforeLegalize() || DCI.isCalledByLegalizer())
8393 EVT VT = N->getValueType(0);
8394 if (VT.is64BitVector() || VT.is128BitVector())
8395 return PerformVMULCombine(N, DCI, Subtarget);
8399 ConstantSDNode *C = dyn_cast<ConstantSDNode>(N->getOperand(1));
8403 int64_t MulAmt = C->getSExtValue();
8404 unsigned ShiftAmt = countTrailingZeros<uint64_t>(MulAmt);
8406 ShiftAmt = ShiftAmt & (32 - 1);
8407 SDValue V = N->getOperand(0);
8411 MulAmt >>= ShiftAmt;
8414 if (isPowerOf2_32(MulAmt - 1)) {
8415 // (mul x, 2^N + 1) => (add (shl x, N), x)
8416 Res = DAG.getNode(ISD::ADD, DL, VT,
8418 DAG.getNode(ISD::SHL, DL, VT,
8420 DAG.getConstant(Log2_32(MulAmt - 1), DL,
8422 } else if (isPowerOf2_32(MulAmt + 1)) {
8423 // (mul x, 2^N - 1) => (sub (shl x, N), x)
8424 Res = DAG.getNode(ISD::SUB, DL, VT,
8425 DAG.getNode(ISD::SHL, DL, VT,
8427 DAG.getConstant(Log2_32(MulAmt + 1), DL,
8433 uint64_t MulAmtAbs = -MulAmt;
8434 if (isPowerOf2_32(MulAmtAbs + 1)) {
8435 // (mul x, -(2^N - 1)) => (sub x, (shl x, N))
8436 Res = DAG.getNode(ISD::SUB, DL, VT,
8438 DAG.getNode(ISD::SHL, DL, VT,
8440 DAG.getConstant(Log2_32(MulAmtAbs + 1), DL,
8442 } else if (isPowerOf2_32(MulAmtAbs - 1)) {
8443 // (mul x, -(2^N + 1)) => - (add (shl x, N), x)
8444 Res = DAG.getNode(ISD::ADD, DL, VT,
8446 DAG.getNode(ISD::SHL, DL, VT,
8448 DAG.getConstant(Log2_32(MulAmtAbs - 1), DL,
8450 Res = DAG.getNode(ISD::SUB, DL, VT,
8451 DAG.getConstant(0, DL, MVT::i32), Res);
8458 Res = DAG.getNode(ISD::SHL, DL, VT,
8459 Res, DAG.getConstant(ShiftAmt, DL, MVT::i32));
8461 // Do not add new nodes to DAG combiner worklist.
8462 DCI.CombineTo(N, Res, false);
8466 static SDValue PerformANDCombine(SDNode *N,
8467 TargetLowering::DAGCombinerInfo &DCI,
8468 const ARMSubtarget *Subtarget) {
8470 // Attempt to use immediate-form VBIC
8471 BuildVectorSDNode *BVN = dyn_cast<BuildVectorSDNode>(N->getOperand(1));
8473 EVT VT = N->getValueType(0);
8474 SelectionDAG &DAG = DCI.DAG;
8476 if(!DAG.getTargetLoweringInfo().isTypeLegal(VT))
8479 APInt SplatBits, SplatUndef;
8480 unsigned SplatBitSize;
8483 BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize, HasAnyUndefs)) {
8484 if (SplatBitSize <= 64) {
8486 SDValue Val = isNEONModifiedImm((~SplatBits).getZExtValue(),
8487 SplatUndef.getZExtValue(), SplatBitSize,
8488 DAG, dl, VbicVT, VT.is128BitVector(),
8490 if (Val.getNode()) {
8492 DAG.getNode(ISD::BITCAST, dl, VbicVT, N->getOperand(0));
8493 SDValue Vbic = DAG.getNode(ARMISD::VBICIMM, dl, VbicVT, Input, Val);
8494 return DAG.getNode(ISD::BITCAST, dl, VT, Vbic);
8499 if (!Subtarget->isThumb1Only()) {
8500 // fold (and (select cc, -1, c), x) -> (select cc, x, (and, x, c))
8501 SDValue Result = combineSelectAndUseCommutative(N, true, DCI);
8502 if (Result.getNode())
8509 /// PerformORCombine - Target-specific dag combine xforms for ISD::OR
8510 static SDValue PerformORCombine(SDNode *N,
8511 TargetLowering::DAGCombinerInfo &DCI,
8512 const ARMSubtarget *Subtarget) {
8513 // Attempt to use immediate-form VORR
8514 BuildVectorSDNode *BVN = dyn_cast<BuildVectorSDNode>(N->getOperand(1));
8516 EVT VT = N->getValueType(0);
8517 SelectionDAG &DAG = DCI.DAG;
8519 if(!DAG.getTargetLoweringInfo().isTypeLegal(VT))
8522 APInt SplatBits, SplatUndef;
8523 unsigned SplatBitSize;
8525 if (BVN && Subtarget->hasNEON() &&
8526 BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize, HasAnyUndefs)) {
8527 if (SplatBitSize <= 64) {
8529 SDValue Val = isNEONModifiedImm(SplatBits.getZExtValue(),
8530 SplatUndef.getZExtValue(), SplatBitSize,
8531 DAG, dl, VorrVT, VT.is128BitVector(),
8533 if (Val.getNode()) {
8535 DAG.getNode(ISD::BITCAST, dl, VorrVT, N->getOperand(0));
8536 SDValue Vorr = DAG.getNode(ARMISD::VORRIMM, dl, VorrVT, Input, Val);
8537 return DAG.getNode(ISD::BITCAST, dl, VT, Vorr);
8542 if (!Subtarget->isThumb1Only()) {
8543 // fold (or (select cc, 0, c), x) -> (select cc, x, (or, x, c))
8544 SDValue Result = combineSelectAndUseCommutative(N, false, DCI);
8545 if (Result.getNode())
8549 // The code below optimizes (or (and X, Y), Z).
8550 // The AND operand needs to have a single user to make these optimizations
8552 SDValue N0 = N->getOperand(0);
8553 if (N0.getOpcode() != ISD::AND || !N0.hasOneUse())
8555 SDValue N1 = N->getOperand(1);
8557 // (or (and B, A), (and C, ~A)) => (VBSL A, B, C) when A is a constant.
8558 if (Subtarget->hasNEON() && N1.getOpcode() == ISD::AND && VT.isVector() &&
8559 DAG.getTargetLoweringInfo().isTypeLegal(VT)) {
8561 unsigned SplatBitSize;
8564 APInt SplatBits0, SplatBits1;
8565 BuildVectorSDNode *BVN0 = dyn_cast<BuildVectorSDNode>(N0->getOperand(1));
8566 BuildVectorSDNode *BVN1 = dyn_cast<BuildVectorSDNode>(N1->getOperand(1));
8567 // Ensure that the second operand of both ands are constants
8568 if (BVN0 && BVN0->isConstantSplat(SplatBits0, SplatUndef, SplatBitSize,
8569 HasAnyUndefs) && !HasAnyUndefs) {
8570 if (BVN1 && BVN1->isConstantSplat(SplatBits1, SplatUndef, SplatBitSize,
8571 HasAnyUndefs) && !HasAnyUndefs) {
8572 // Ensure that the bit width of the constants are the same and that
8573 // the splat arguments are logical inverses as per the pattern we
8574 // are trying to simplify.
8575 if (SplatBits0.getBitWidth() == SplatBits1.getBitWidth() &&
8576 SplatBits0 == ~SplatBits1) {
8577 // Canonicalize the vector type to make instruction selection
8579 EVT CanonicalVT = VT.is128BitVector() ? MVT::v4i32 : MVT::v2i32;
8580 SDValue Result = DAG.getNode(ARMISD::VBSL, dl, CanonicalVT,
8584 return DAG.getNode(ISD::BITCAST, dl, VT, Result);
8590 // Try to use the ARM/Thumb2 BFI (bitfield insert) instruction when
8593 // BFI is only available on V6T2+
8594 if (Subtarget->isThumb1Only() || !Subtarget->hasV6T2Ops())
8598 // 1) or (and A, mask), val => ARMbfi A, val, mask
8599 // iff (val & mask) == val
8601 // 2) or (and A, mask), (and B, mask2) => ARMbfi A, (lsr B, amt), mask
8602 // 2a) iff isBitFieldInvertedMask(mask) && isBitFieldInvertedMask(~mask2)
8603 // && mask == ~mask2
8604 // 2b) iff isBitFieldInvertedMask(~mask) && isBitFieldInvertedMask(mask2)
8605 // && ~mask == mask2
8606 // (i.e., copy a bitfield value into another bitfield of the same width)
8611 SDValue N00 = N0.getOperand(0);
8613 // The value and the mask need to be constants so we can verify this is
8614 // actually a bitfield set. If the mask is 0xffff, we can do better
8615 // via a movt instruction, so don't use BFI in that case.
8616 SDValue MaskOp = N0.getOperand(1);
8617 ConstantSDNode *MaskC = dyn_cast<ConstantSDNode>(MaskOp);
8620 unsigned Mask = MaskC->getZExtValue();
8624 // Case (1): or (and A, mask), val => ARMbfi A, val, mask
8625 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1);
8627 unsigned Val = N1C->getZExtValue();
8628 if ((Val & ~Mask) != Val)
8631 if (ARM::isBitFieldInvertedMask(Mask)) {
8632 Val >>= countTrailingZeros(~Mask);
8634 Res = DAG.getNode(ARMISD::BFI, DL, VT, N00,
8635 DAG.getConstant(Val, DL, MVT::i32),
8636 DAG.getConstant(Mask, DL, MVT::i32));
8638 // Do not add new nodes to DAG combiner worklist.
8639 DCI.CombineTo(N, Res, false);
8642 } else if (N1.getOpcode() == ISD::AND) {
8643 // case (2) or (and A, mask), (and B, mask2) => ARMbfi A, (lsr B, amt), mask
8644 ConstantSDNode *N11C = dyn_cast<ConstantSDNode>(N1.getOperand(1));
8647 unsigned Mask2 = N11C->getZExtValue();
8649 // Mask and ~Mask2 (or reverse) must be equivalent for the BFI pattern
8651 if (ARM::isBitFieldInvertedMask(Mask) &&
8653 // The pack halfword instruction works better for masks that fit it,
8654 // so use that when it's available.
8655 if (Subtarget->hasT2ExtractPack() &&
8656 (Mask == 0xffff || Mask == 0xffff0000))
8659 unsigned amt = countTrailingZeros(Mask2);
8660 Res = DAG.getNode(ISD::SRL, DL, VT, N1.getOperand(0),
8661 DAG.getConstant(amt, DL, MVT::i32));
8662 Res = DAG.getNode(ARMISD::BFI, DL, VT, N00, Res,
8663 DAG.getConstant(Mask, DL, MVT::i32));
8664 // Do not add new nodes to DAG combiner worklist.
8665 DCI.CombineTo(N, Res, false);
8667 } else if (ARM::isBitFieldInvertedMask(~Mask) &&
8669 // The pack halfword instruction works better for masks that fit it,
8670 // so use that when it's available.
8671 if (Subtarget->hasT2ExtractPack() &&
8672 (Mask2 == 0xffff || Mask2 == 0xffff0000))
8675 unsigned lsb = countTrailingZeros(Mask);
8676 Res = DAG.getNode(ISD::SRL, DL, VT, N00,
8677 DAG.getConstant(lsb, DL, MVT::i32));
8678 Res = DAG.getNode(ARMISD::BFI, DL, VT, N1.getOperand(0), Res,
8679 DAG.getConstant(Mask2, DL, MVT::i32));
8680 // Do not add new nodes to DAG combiner worklist.
8681 DCI.CombineTo(N, Res, false);
8686 if (DAG.MaskedValueIsZero(N1, MaskC->getAPIntValue()) &&
8687 N00.getOpcode() == ISD::SHL && isa<ConstantSDNode>(N00.getOperand(1)) &&
8688 ARM::isBitFieldInvertedMask(~Mask)) {
8689 // Case (3): or (and (shl A, #shamt), mask), B => ARMbfi B, A, ~mask
8690 // where lsb(mask) == #shamt and masked bits of B are known zero.
8691 SDValue ShAmt = N00.getOperand(1);
8692 unsigned ShAmtC = cast<ConstantSDNode>(ShAmt)->getZExtValue();
8693 unsigned LSB = countTrailingZeros(Mask);
8697 Res = DAG.getNode(ARMISD::BFI, DL, VT, N1, N00.getOperand(0),
8698 DAG.getConstant(~Mask, DL, MVT::i32));
8700 // Do not add new nodes to DAG combiner worklist.
8701 DCI.CombineTo(N, Res, false);
8707 static SDValue PerformXORCombine(SDNode *N,
8708 TargetLowering::DAGCombinerInfo &DCI,
8709 const ARMSubtarget *Subtarget) {
8710 EVT VT = N->getValueType(0);
8711 SelectionDAG &DAG = DCI.DAG;
8713 if(!DAG.getTargetLoweringInfo().isTypeLegal(VT))
8716 if (!Subtarget->isThumb1Only()) {
8717 // fold (xor (select cc, 0, c), x) -> (select cc, x, (xor, x, c))
8718 SDValue Result = combineSelectAndUseCommutative(N, false, DCI);
8719 if (Result.getNode())
8726 /// PerformBFICombine - (bfi A, (and B, Mask1), Mask2) -> (bfi A, B, Mask2) iff
8727 /// the bits being cleared by the AND are not demanded by the BFI.
8728 static SDValue PerformBFICombine(SDNode *N,
8729 TargetLowering::DAGCombinerInfo &DCI) {
8730 SDValue N1 = N->getOperand(1);
8731 if (N1.getOpcode() == ISD::AND) {
8732 ConstantSDNode *N11C = dyn_cast<ConstantSDNode>(N1.getOperand(1));
8735 unsigned InvMask = cast<ConstantSDNode>(N->getOperand(2))->getZExtValue();
8736 unsigned LSB = countTrailingZeros(~InvMask);
8737 unsigned Width = (32 - countLeadingZeros(~InvMask)) - LSB;
8739 static_cast<unsigned>(std::numeric_limits<unsigned>::digits) &&
8740 "undefined behavior");
8741 unsigned Mask = (1u << Width) - 1;
8742 unsigned Mask2 = N11C->getZExtValue();
8743 if ((Mask & (~Mask2)) == 0)
8744 return DCI.DAG.getNode(ARMISD::BFI, SDLoc(N), N->getValueType(0),
8745 N->getOperand(0), N1.getOperand(0),
8751 /// PerformVMOVRRDCombine - Target-specific dag combine xforms for
8752 /// ARMISD::VMOVRRD.
8753 static SDValue PerformVMOVRRDCombine(SDNode *N,
8754 TargetLowering::DAGCombinerInfo &DCI,
8755 const ARMSubtarget *Subtarget) {
8756 // vmovrrd(vmovdrr x, y) -> x,y
8757 SDValue InDouble = N->getOperand(0);
8758 if (InDouble.getOpcode() == ARMISD::VMOVDRR && !Subtarget->isFPOnlySP())
8759 return DCI.CombineTo(N, InDouble.getOperand(0), InDouble.getOperand(1));
8761 // vmovrrd(load f64) -> (load i32), (load i32)
8762 SDNode *InNode = InDouble.getNode();
8763 if (ISD::isNormalLoad(InNode) && InNode->hasOneUse() &&
8764 InNode->getValueType(0) == MVT::f64 &&
8765 InNode->getOperand(1).getOpcode() == ISD::FrameIndex &&
8766 !cast<LoadSDNode>(InNode)->isVolatile()) {
8767 // TODO: Should this be done for non-FrameIndex operands?
8768 LoadSDNode *LD = cast<LoadSDNode>(InNode);
8770 SelectionDAG &DAG = DCI.DAG;
8772 SDValue BasePtr = LD->getBasePtr();
8773 SDValue NewLD1 = DAG.getLoad(MVT::i32, DL, LD->getChain(), BasePtr,
8774 LD->getPointerInfo(), LD->isVolatile(),
8775 LD->isNonTemporal(), LD->isInvariant(),
8776 LD->getAlignment());
8778 SDValue OffsetPtr = DAG.getNode(ISD::ADD, DL, MVT::i32, BasePtr,
8779 DAG.getConstant(4, DL, MVT::i32));
8780 SDValue NewLD2 = DAG.getLoad(MVT::i32, DL, NewLD1.getValue(1), OffsetPtr,
8781 LD->getPointerInfo(), LD->isVolatile(),
8782 LD->isNonTemporal(), LD->isInvariant(),
8783 std::min(4U, LD->getAlignment() / 2));
8785 DAG.ReplaceAllUsesOfValueWith(SDValue(LD, 1), NewLD2.getValue(1));
8786 if (DCI.DAG.getDataLayout().isBigEndian())
8787 std::swap (NewLD1, NewLD2);
8788 SDValue Result = DCI.CombineTo(N, NewLD1, NewLD2);
8795 /// PerformVMOVDRRCombine - Target-specific dag combine xforms for
8796 /// ARMISD::VMOVDRR. This is also used for BUILD_VECTORs with 2 operands.
8797 static SDValue PerformVMOVDRRCombine(SDNode *N, SelectionDAG &DAG) {
8798 // N=vmovrrd(X); vmovdrr(N:0, N:1) -> bit_convert(X)
8799 SDValue Op0 = N->getOperand(0);
8800 SDValue Op1 = N->getOperand(1);
8801 if (Op0.getOpcode() == ISD::BITCAST)
8802 Op0 = Op0.getOperand(0);
8803 if (Op1.getOpcode() == ISD::BITCAST)
8804 Op1 = Op1.getOperand(0);
8805 if (Op0.getOpcode() == ARMISD::VMOVRRD &&
8806 Op0.getNode() == Op1.getNode() &&
8807 Op0.getResNo() == 0 && Op1.getResNo() == 1)
8808 return DAG.getNode(ISD::BITCAST, SDLoc(N),
8809 N->getValueType(0), Op0.getOperand(0));
8813 /// hasNormalLoadOperand - Check if any of the operands of a BUILD_VECTOR node
8814 /// are normal, non-volatile loads. If so, it is profitable to bitcast an
8815 /// i64 vector to have f64 elements, since the value can then be loaded
8816 /// directly into a VFP register.
8817 static bool hasNormalLoadOperand(SDNode *N) {
8818 unsigned NumElts = N->getValueType(0).getVectorNumElements();
8819 for (unsigned i = 0; i < NumElts; ++i) {
8820 SDNode *Elt = N->getOperand(i).getNode();
8821 if (ISD::isNormalLoad(Elt) && !cast<LoadSDNode>(Elt)->isVolatile())
8827 /// PerformBUILD_VECTORCombine - Target-specific dag combine xforms for
8828 /// ISD::BUILD_VECTOR.
8829 static SDValue PerformBUILD_VECTORCombine(SDNode *N,
8830 TargetLowering::DAGCombinerInfo &DCI,
8831 const ARMSubtarget *Subtarget) {
8832 // build_vector(N=ARMISD::VMOVRRD(X), N:1) -> bit_convert(X):
8833 // VMOVRRD is introduced when legalizing i64 types. It forces the i64 value
8834 // into a pair of GPRs, which is fine when the value is used as a scalar,
8835 // but if the i64 value is converted to a vector, we need to undo the VMOVRRD.
8836 SelectionDAG &DAG = DCI.DAG;
8837 if (N->getNumOperands() == 2) {
8838 SDValue RV = PerformVMOVDRRCombine(N, DAG);
8843 // Load i64 elements as f64 values so that type legalization does not split
8844 // them up into i32 values.
8845 EVT VT = N->getValueType(0);
8846 if (VT.getVectorElementType() != MVT::i64 || !hasNormalLoadOperand(N))
8849 SmallVector<SDValue, 8> Ops;
8850 unsigned NumElts = VT.getVectorNumElements();
8851 for (unsigned i = 0; i < NumElts; ++i) {
8852 SDValue V = DAG.getNode(ISD::BITCAST, dl, MVT::f64, N->getOperand(i));
8854 // Make the DAGCombiner fold the bitcast.
8855 DCI.AddToWorklist(V.getNode());
8857 EVT FloatVT = EVT::getVectorVT(*DAG.getContext(), MVT::f64, NumElts);
8858 SDValue BV = DAG.getNode(ISD::BUILD_VECTOR, dl, FloatVT, Ops);
8859 return DAG.getNode(ISD::BITCAST, dl, VT, BV);
8862 /// \brief Target-specific dag combine xforms for ARMISD::BUILD_VECTOR.
8864 PerformARMBUILD_VECTORCombine(SDNode *N, TargetLowering::DAGCombinerInfo &DCI) {
8865 // ARMISD::BUILD_VECTOR is introduced when legalizing ISD::BUILD_VECTOR.
8866 // At that time, we may have inserted bitcasts from integer to float.
8867 // If these bitcasts have survived DAGCombine, change the lowering of this
8868 // BUILD_VECTOR in something more vector friendly, i.e., that does not
8869 // force to use floating point types.
8871 // Make sure we can change the type of the vector.
8872 // This is possible iff:
8873 // 1. The vector is only used in a bitcast to a integer type. I.e.,
8874 // 1.1. Vector is used only once.
8875 // 1.2. Use is a bit convert to an integer type.
8876 // 2. The size of its operands are 32-bits (64-bits are not legal).
8877 EVT VT = N->getValueType(0);
8878 EVT EltVT = VT.getVectorElementType();
8880 // Check 1.1. and 2.
8881 if (EltVT.getSizeInBits() != 32 || !N->hasOneUse())
8884 // By construction, the input type must be float.
8885 assert(EltVT == MVT::f32 && "Unexpected type!");
8888 SDNode *Use = *N->use_begin();
8889 if (Use->getOpcode() != ISD::BITCAST ||
8890 Use->getValueType(0).isFloatingPoint())
8893 // Check profitability.
8894 // Model is, if more than half of the relevant operands are bitcast from
8895 // i32, turn the build_vector into a sequence of insert_vector_elt.
8896 // Relevant operands are everything that is not statically
8897 // (i.e., at compile time) bitcasted.
8898 unsigned NumOfBitCastedElts = 0;
8899 unsigned NumElts = VT.getVectorNumElements();
8900 unsigned NumOfRelevantElts = NumElts;
8901 for (unsigned Idx = 0; Idx < NumElts; ++Idx) {
8902 SDValue Elt = N->getOperand(Idx);
8903 if (Elt->getOpcode() == ISD::BITCAST) {
8904 // Assume only bit cast to i32 will go away.
8905 if (Elt->getOperand(0).getValueType() == MVT::i32)
8906 ++NumOfBitCastedElts;
8907 } else if (Elt.getOpcode() == ISD::UNDEF || isa<ConstantSDNode>(Elt))
8908 // Constants are statically casted, thus do not count them as
8909 // relevant operands.
8910 --NumOfRelevantElts;
8913 // Check if more than half of the elements require a non-free bitcast.
8914 if (NumOfBitCastedElts <= NumOfRelevantElts / 2)
8917 SelectionDAG &DAG = DCI.DAG;
8918 // Create the new vector type.
8919 EVT VecVT = EVT::getVectorVT(*DAG.getContext(), MVT::i32, NumElts);
8920 // Check if the type is legal.
8921 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
8922 if (!TLI.isTypeLegal(VecVT))
8926 // ARMISD::BUILD_VECTOR E1, E2, ..., EN.
8927 // => BITCAST INSERT_VECTOR_ELT
8928 // (INSERT_VECTOR_ELT (...), (BITCAST EN-1), N-1),
8930 SDValue Vec = DAG.getUNDEF(VecVT);
8932 for (unsigned Idx = 0 ; Idx < NumElts; ++Idx) {
8933 SDValue V = N->getOperand(Idx);
8934 if (V.getOpcode() == ISD::UNDEF)
8936 if (V.getOpcode() == ISD::BITCAST &&
8937 V->getOperand(0).getValueType() == MVT::i32)
8938 // Fold obvious case.
8939 V = V.getOperand(0);
8941 V = DAG.getNode(ISD::BITCAST, SDLoc(V), MVT::i32, V);
8942 // Make the DAGCombiner fold the bitcasts.
8943 DCI.AddToWorklist(V.getNode());
8945 SDValue LaneIdx = DAG.getConstant(Idx, dl, MVT::i32);
8946 Vec = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VecVT, Vec, V, LaneIdx);
8948 Vec = DAG.getNode(ISD::BITCAST, dl, VT, Vec);
8949 // Make the DAGCombiner fold the bitcasts.
8950 DCI.AddToWorklist(Vec.getNode());
8954 /// PerformInsertEltCombine - Target-specific dag combine xforms for
8955 /// ISD::INSERT_VECTOR_ELT.
8956 static SDValue PerformInsertEltCombine(SDNode *N,
8957 TargetLowering::DAGCombinerInfo &DCI) {
8958 // Bitcast an i64 load inserted into a vector to f64.
8959 // Otherwise, the i64 value will be legalized to a pair of i32 values.
8960 EVT VT = N->getValueType(0);
8961 SDNode *Elt = N->getOperand(1).getNode();
8962 if (VT.getVectorElementType() != MVT::i64 ||
8963 !ISD::isNormalLoad(Elt) || cast<LoadSDNode>(Elt)->isVolatile())
8966 SelectionDAG &DAG = DCI.DAG;
8968 EVT FloatVT = EVT::getVectorVT(*DAG.getContext(), MVT::f64,
8969 VT.getVectorNumElements());
8970 SDValue Vec = DAG.getNode(ISD::BITCAST, dl, FloatVT, N->getOperand(0));
8971 SDValue V = DAG.getNode(ISD::BITCAST, dl, MVT::f64, N->getOperand(1));
8972 // Make the DAGCombiner fold the bitcasts.
8973 DCI.AddToWorklist(Vec.getNode());
8974 DCI.AddToWorklist(V.getNode());
8975 SDValue InsElt = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, FloatVT,
8976 Vec, V, N->getOperand(2));
8977 return DAG.getNode(ISD::BITCAST, dl, VT, InsElt);
8980 /// PerformVECTOR_SHUFFLECombine - Target-specific dag combine xforms for
8981 /// ISD::VECTOR_SHUFFLE.
8982 static SDValue PerformVECTOR_SHUFFLECombine(SDNode *N, SelectionDAG &DAG) {
8983 // The LLVM shufflevector instruction does not require the shuffle mask
8984 // length to match the operand vector length, but ISD::VECTOR_SHUFFLE does
8985 // have that requirement. When translating to ISD::VECTOR_SHUFFLE, if the
8986 // operands do not match the mask length, they are extended by concatenating
8987 // them with undef vectors. That is probably the right thing for other
8988 // targets, but for NEON it is better to concatenate two double-register
8989 // size vector operands into a single quad-register size vector. Do that
8990 // transformation here:
8991 // shuffle(concat(v1, undef), concat(v2, undef)) ->
8992 // shuffle(concat(v1, v2), undef)
8993 SDValue Op0 = N->getOperand(0);
8994 SDValue Op1 = N->getOperand(1);
8995 if (Op0.getOpcode() != ISD::CONCAT_VECTORS ||
8996 Op1.getOpcode() != ISD::CONCAT_VECTORS ||
8997 Op0.getNumOperands() != 2 ||
8998 Op1.getNumOperands() != 2)
9000 SDValue Concat0Op1 = Op0.getOperand(1);
9001 SDValue Concat1Op1 = Op1.getOperand(1);
9002 if (Concat0Op1.getOpcode() != ISD::UNDEF ||
9003 Concat1Op1.getOpcode() != ISD::UNDEF)
9005 // Skip the transformation if any of the types are illegal.
9006 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
9007 EVT VT = N->getValueType(0);
9008 if (!TLI.isTypeLegal(VT) ||
9009 !TLI.isTypeLegal(Concat0Op1.getValueType()) ||
9010 !TLI.isTypeLegal(Concat1Op1.getValueType()))
9013 SDValue NewConcat = DAG.getNode(ISD::CONCAT_VECTORS, SDLoc(N), VT,
9014 Op0.getOperand(0), Op1.getOperand(0));
9015 // Translate the shuffle mask.
9016 SmallVector<int, 16> NewMask;
9017 unsigned NumElts = VT.getVectorNumElements();
9018 unsigned HalfElts = NumElts/2;
9019 ShuffleVectorSDNode *SVN = cast<ShuffleVectorSDNode>(N);
9020 for (unsigned n = 0; n < NumElts; ++n) {
9021 int MaskElt = SVN->getMaskElt(n);
9023 if (MaskElt < (int)HalfElts)
9025 else if (MaskElt >= (int)NumElts && MaskElt < (int)(NumElts + HalfElts))
9026 NewElt = HalfElts + MaskElt - NumElts;
9027 NewMask.push_back(NewElt);
9029 return DAG.getVectorShuffle(VT, SDLoc(N), NewConcat,
9030 DAG.getUNDEF(VT), NewMask.data());
9033 /// CombineBaseUpdate - Target-specific DAG combine function for VLDDUP,
9034 /// NEON load/store intrinsics, and generic vector load/stores, to merge
9035 /// base address updates.
9036 /// For generic load/stores, the memory type is assumed to be a vector.
9037 /// The caller is assumed to have checked legality.
9038 static SDValue CombineBaseUpdate(SDNode *N,
9039 TargetLowering::DAGCombinerInfo &DCI) {
9040 SelectionDAG &DAG = DCI.DAG;
9041 const bool isIntrinsic = (N->getOpcode() == ISD::INTRINSIC_VOID ||
9042 N->getOpcode() == ISD::INTRINSIC_W_CHAIN);
9043 const bool isStore = N->getOpcode() == ISD::STORE;
9044 const unsigned AddrOpIdx = ((isIntrinsic || isStore) ? 2 : 1);
9045 SDValue Addr = N->getOperand(AddrOpIdx);
9046 MemSDNode *MemN = cast<MemSDNode>(N);
9049 // Search for a use of the address operand that is an increment.
9050 for (SDNode::use_iterator UI = Addr.getNode()->use_begin(),
9051 UE = Addr.getNode()->use_end(); UI != UE; ++UI) {
9053 if (User->getOpcode() != ISD::ADD ||
9054 UI.getUse().getResNo() != Addr.getResNo())
9057 // Check that the add is independent of the load/store. Otherwise, folding
9058 // it would create a cycle.
9059 if (User->isPredecessorOf(N) || N->isPredecessorOf(User))
9062 // Find the new opcode for the updating load/store.
9063 bool isLoadOp = true;
9064 bool isLaneOp = false;
9065 unsigned NewOpc = 0;
9066 unsigned NumVecs = 0;
9068 unsigned IntNo = cast<ConstantSDNode>(N->getOperand(1))->getZExtValue();
9070 default: llvm_unreachable("unexpected intrinsic for Neon base update");
9071 case Intrinsic::arm_neon_vld1: NewOpc = ARMISD::VLD1_UPD;
9073 case Intrinsic::arm_neon_vld2: NewOpc = ARMISD::VLD2_UPD;
9075 case Intrinsic::arm_neon_vld3: NewOpc = ARMISD::VLD3_UPD;
9077 case Intrinsic::arm_neon_vld4: NewOpc = ARMISD::VLD4_UPD;
9079 case Intrinsic::arm_neon_vld2lane: NewOpc = ARMISD::VLD2LN_UPD;
9080 NumVecs = 2; isLaneOp = true; break;
9081 case Intrinsic::arm_neon_vld3lane: NewOpc = ARMISD::VLD3LN_UPD;
9082 NumVecs = 3; isLaneOp = true; break;
9083 case Intrinsic::arm_neon_vld4lane: NewOpc = ARMISD::VLD4LN_UPD;
9084 NumVecs = 4; isLaneOp = true; break;
9085 case Intrinsic::arm_neon_vst1: NewOpc = ARMISD::VST1_UPD;
9086 NumVecs = 1; isLoadOp = false; break;
9087 case Intrinsic::arm_neon_vst2: NewOpc = ARMISD::VST2_UPD;
9088 NumVecs = 2; isLoadOp = false; break;
9089 case Intrinsic::arm_neon_vst3: NewOpc = ARMISD::VST3_UPD;
9090 NumVecs = 3; isLoadOp = false; break;
9091 case Intrinsic::arm_neon_vst4: NewOpc = ARMISD::VST4_UPD;
9092 NumVecs = 4; isLoadOp = false; break;
9093 case Intrinsic::arm_neon_vst2lane: NewOpc = ARMISD::VST2LN_UPD;
9094 NumVecs = 2; isLoadOp = false; isLaneOp = true; break;
9095 case Intrinsic::arm_neon_vst3lane: NewOpc = ARMISD::VST3LN_UPD;
9096 NumVecs = 3; isLoadOp = false; isLaneOp = true; break;
9097 case Intrinsic::arm_neon_vst4lane: NewOpc = ARMISD::VST4LN_UPD;
9098 NumVecs = 4; isLoadOp = false; isLaneOp = true; break;
9102 switch (N->getOpcode()) {
9103 default: llvm_unreachable("unexpected opcode for Neon base update");
9104 case ARMISD::VLD2DUP: NewOpc = ARMISD::VLD2DUP_UPD; NumVecs = 2; break;
9105 case ARMISD::VLD3DUP: NewOpc = ARMISD::VLD3DUP_UPD; NumVecs = 3; break;
9106 case ARMISD::VLD4DUP: NewOpc = ARMISD::VLD4DUP_UPD; NumVecs = 4; break;
9107 case ISD::LOAD: NewOpc = ARMISD::VLD1_UPD;
9108 NumVecs = 1; isLaneOp = false; break;
9109 case ISD::STORE: NewOpc = ARMISD::VST1_UPD;
9110 NumVecs = 1; isLaneOp = false; isLoadOp = false; break;
9114 // Find the size of memory referenced by the load/store.
9117 VecTy = N->getValueType(0);
9118 } else if (isIntrinsic) {
9119 VecTy = N->getOperand(AddrOpIdx+1).getValueType();
9121 assert(isStore && "Node has to be a load, a store, or an intrinsic!");
9122 VecTy = N->getOperand(1).getValueType();
9125 unsigned NumBytes = NumVecs * VecTy.getSizeInBits() / 8;
9127 NumBytes /= VecTy.getVectorNumElements();
9129 // If the increment is a constant, it must match the memory ref size.
9130 SDValue Inc = User->getOperand(User->getOperand(0) == Addr ? 1 : 0);
9131 if (ConstantSDNode *CInc = dyn_cast<ConstantSDNode>(Inc.getNode())) {
9132 uint64_t IncVal = CInc->getZExtValue();
9133 if (IncVal != NumBytes)
9135 } else if (NumBytes >= 3 * 16) {
9136 // VLD3/4 and VST3/4 for 128-bit vectors are implemented with two
9137 // separate instructions that make it harder to use a non-constant update.
9141 // OK, we found an ADD we can fold into the base update.
9142 // Now, create a _UPD node, taking care of not breaking alignment.
9144 EVT AlignedVecTy = VecTy;
9145 unsigned Alignment = MemN->getAlignment();
9147 // If this is a less-than-standard-aligned load/store, change the type to
9148 // match the standard alignment.
9149 // The alignment is overlooked when selecting _UPD variants; and it's
9150 // easier to introduce bitcasts here than fix that.
9151 // There are 3 ways to get to this base-update combine:
9152 // - intrinsics: they are assumed to be properly aligned (to the standard
9153 // alignment of the memory type), so we don't need to do anything.
9154 // - ARMISD::VLDx nodes: they are only generated from the aforementioned
9155 // intrinsics, so, likewise, there's nothing to do.
9156 // - generic load/store instructions: the alignment is specified as an
9157 // explicit operand, rather than implicitly as the standard alignment
9158 // of the memory type (like the intrisics). We need to change the
9159 // memory type to match the explicit alignment. That way, we don't
9160 // generate non-standard-aligned ARMISD::VLDx nodes.
9161 if (isa<LSBaseSDNode>(N)) {
9164 if (Alignment < VecTy.getScalarSizeInBits() / 8) {
9165 MVT EltTy = MVT::getIntegerVT(Alignment * 8);
9166 assert(NumVecs == 1 && "Unexpected multi-element generic load/store.");
9167 assert(!isLaneOp && "Unexpected generic load/store lane.");
9168 unsigned NumElts = NumBytes / (EltTy.getSizeInBits() / 8);
9169 AlignedVecTy = MVT::getVectorVT(EltTy, NumElts);
9171 // Don't set an explicit alignment on regular load/stores that we want
9172 // to transform to VLD/VST 1_UPD nodes.
9173 // This matches the behavior of regular load/stores, which only get an
9174 // explicit alignment if the MMO alignment is larger than the standard
9175 // alignment of the memory type.
9176 // Intrinsics, however, always get an explicit alignment, set to the
9177 // alignment of the MMO.
9181 // Create the new updating load/store node.
9182 // First, create an SDVTList for the new updating node's results.
9184 unsigned NumResultVecs = (isLoadOp ? NumVecs : 0);
9186 for (n = 0; n < NumResultVecs; ++n)
9187 Tys[n] = AlignedVecTy;
9188 Tys[n++] = MVT::i32;
9189 Tys[n] = MVT::Other;
9190 SDVTList SDTys = DAG.getVTList(makeArrayRef(Tys, NumResultVecs+2));
9192 // Then, gather the new node's operands.
9193 SmallVector<SDValue, 8> Ops;
9194 Ops.push_back(N->getOperand(0)); // incoming chain
9195 Ops.push_back(N->getOperand(AddrOpIdx));
9198 if (StoreSDNode *StN = dyn_cast<StoreSDNode>(N)) {
9199 // Try to match the intrinsic's signature
9200 Ops.push_back(StN->getValue());
9202 // Loads (and of course intrinsics) match the intrinsics' signature,
9203 // so just add all but the alignment operand.
9204 for (unsigned i = AddrOpIdx + 1; i < N->getNumOperands() - 1; ++i)
9205 Ops.push_back(N->getOperand(i));
9208 // For all node types, the alignment operand is always the last one.
9209 Ops.push_back(DAG.getConstant(Alignment, dl, MVT::i32));
9211 // If this is a non-standard-aligned STORE, the penultimate operand is the
9212 // stored value. Bitcast it to the aligned type.
9213 if (AlignedVecTy != VecTy && N->getOpcode() == ISD::STORE) {
9214 SDValue &StVal = Ops[Ops.size()-2];
9215 StVal = DAG.getNode(ISD::BITCAST, dl, AlignedVecTy, StVal);
9218 SDValue UpdN = DAG.getMemIntrinsicNode(NewOpc, dl, SDTys,
9220 MemN->getMemOperand());
9223 SmallVector<SDValue, 5> NewResults;
9224 for (unsigned i = 0; i < NumResultVecs; ++i)
9225 NewResults.push_back(SDValue(UpdN.getNode(), i));
9227 // If this is an non-standard-aligned LOAD, the first result is the loaded
9228 // value. Bitcast it to the expected result type.
9229 if (AlignedVecTy != VecTy && N->getOpcode() == ISD::LOAD) {
9230 SDValue &LdVal = NewResults[0];
9231 LdVal = DAG.getNode(ISD::BITCAST, dl, VecTy, LdVal);
9234 NewResults.push_back(SDValue(UpdN.getNode(), NumResultVecs+1)); // chain
9235 DCI.CombineTo(N, NewResults);
9236 DCI.CombineTo(User, SDValue(UpdN.getNode(), NumResultVecs));
9243 static SDValue PerformVLDCombine(SDNode *N,
9244 TargetLowering::DAGCombinerInfo &DCI) {
9245 if (DCI.isBeforeLegalize() || DCI.isCalledByLegalizer())
9248 return CombineBaseUpdate(N, DCI);
9251 /// CombineVLDDUP - For a VDUPLANE node N, check if its source operand is a
9252 /// vldN-lane (N > 1) intrinsic, and if all the other uses of that intrinsic
9253 /// are also VDUPLANEs. If so, combine them to a vldN-dup operation and
9255 static bool CombineVLDDUP(SDNode *N, TargetLowering::DAGCombinerInfo &DCI) {
9256 SelectionDAG &DAG = DCI.DAG;
9257 EVT VT = N->getValueType(0);
9258 // vldN-dup instructions only support 64-bit vectors for N > 1.
9259 if (!VT.is64BitVector())
9262 // Check if the VDUPLANE operand is a vldN-dup intrinsic.
9263 SDNode *VLD = N->getOperand(0).getNode();
9264 if (VLD->getOpcode() != ISD::INTRINSIC_W_CHAIN)
9266 unsigned NumVecs = 0;
9267 unsigned NewOpc = 0;
9268 unsigned IntNo = cast<ConstantSDNode>(VLD->getOperand(1))->getZExtValue();
9269 if (IntNo == Intrinsic::arm_neon_vld2lane) {
9271 NewOpc = ARMISD::VLD2DUP;
9272 } else if (IntNo == Intrinsic::arm_neon_vld3lane) {
9274 NewOpc = ARMISD::VLD3DUP;
9275 } else if (IntNo == Intrinsic::arm_neon_vld4lane) {
9277 NewOpc = ARMISD::VLD4DUP;
9282 // First check that all the vldN-lane uses are VDUPLANEs and that the lane
9283 // numbers match the load.
9284 unsigned VLDLaneNo =
9285 cast<ConstantSDNode>(VLD->getOperand(NumVecs+3))->getZExtValue();
9286 for (SDNode::use_iterator UI = VLD->use_begin(), UE = VLD->use_end();
9288 // Ignore uses of the chain result.
9289 if (UI.getUse().getResNo() == NumVecs)
9292 if (User->getOpcode() != ARMISD::VDUPLANE ||
9293 VLDLaneNo != cast<ConstantSDNode>(User->getOperand(1))->getZExtValue())
9297 // Create the vldN-dup node.
9300 for (n = 0; n < NumVecs; ++n)
9302 Tys[n] = MVT::Other;
9303 SDVTList SDTys = DAG.getVTList(makeArrayRef(Tys, NumVecs+1));
9304 SDValue Ops[] = { VLD->getOperand(0), VLD->getOperand(2) };
9305 MemIntrinsicSDNode *VLDMemInt = cast<MemIntrinsicSDNode>(VLD);
9306 SDValue VLDDup = DAG.getMemIntrinsicNode(NewOpc, SDLoc(VLD), SDTys,
9307 Ops, VLDMemInt->getMemoryVT(),
9308 VLDMemInt->getMemOperand());
9311 for (SDNode::use_iterator UI = VLD->use_begin(), UE = VLD->use_end();
9313 unsigned ResNo = UI.getUse().getResNo();
9314 // Ignore uses of the chain result.
9315 if (ResNo == NumVecs)
9318 DCI.CombineTo(User, SDValue(VLDDup.getNode(), ResNo));
9321 // Now the vldN-lane intrinsic is dead except for its chain result.
9322 // Update uses of the chain.
9323 std::vector<SDValue> VLDDupResults;
9324 for (unsigned n = 0; n < NumVecs; ++n)
9325 VLDDupResults.push_back(SDValue(VLDDup.getNode(), n));
9326 VLDDupResults.push_back(SDValue(VLDDup.getNode(), NumVecs));
9327 DCI.CombineTo(VLD, VLDDupResults);
9332 /// PerformVDUPLANECombine - Target-specific dag combine xforms for
9333 /// ARMISD::VDUPLANE.
9334 static SDValue PerformVDUPLANECombine(SDNode *N,
9335 TargetLowering::DAGCombinerInfo &DCI) {
9336 SDValue Op = N->getOperand(0);
9338 // If the source is a vldN-lane (N > 1) intrinsic, and all the other uses
9339 // of that intrinsic are also VDUPLANEs, combine them to a vldN-dup operation.
9340 if (CombineVLDDUP(N, DCI))
9341 return SDValue(N, 0);
9343 // If the source is already a VMOVIMM or VMVNIMM splat, the VDUPLANE is
9344 // redundant. Ignore bit_converts for now; element sizes are checked below.
9345 while (Op.getOpcode() == ISD::BITCAST)
9346 Op = Op.getOperand(0);
9347 if (Op.getOpcode() != ARMISD::VMOVIMM && Op.getOpcode() != ARMISD::VMVNIMM)
9350 // Make sure the VMOV element size is not bigger than the VDUPLANE elements.
9351 unsigned EltSize = Op.getValueType().getVectorElementType().getSizeInBits();
9352 // The canonical VMOV for a zero vector uses a 32-bit element size.
9353 unsigned Imm = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
9355 if (ARM_AM::decodeNEONModImm(Imm, EltBits) == 0)
9357 EVT VT = N->getValueType(0);
9358 if (EltSize > VT.getVectorElementType().getSizeInBits())
9361 return DCI.DAG.getNode(ISD::BITCAST, SDLoc(N), VT, Op);
9364 static SDValue PerformLOADCombine(SDNode *N,
9365 TargetLowering::DAGCombinerInfo &DCI) {
9366 EVT VT = N->getValueType(0);
9368 // If this is a legal vector load, try to combine it into a VLD1_UPD.
9369 if (ISD::isNormalLoad(N) && VT.isVector() &&
9370 DCI.DAG.getTargetLoweringInfo().isTypeLegal(VT))
9371 return CombineBaseUpdate(N, DCI);
9376 /// PerformSTORECombine - Target-specific dag combine xforms for
9378 static SDValue PerformSTORECombine(SDNode *N,
9379 TargetLowering::DAGCombinerInfo &DCI) {
9380 StoreSDNode *St = cast<StoreSDNode>(N);
9381 if (St->isVolatile())
9384 // Optimize trunc store (of multiple scalars) to shuffle and store. First,
9385 // pack all of the elements in one place. Next, store to memory in fewer
9387 SDValue StVal = St->getValue();
9388 EVT VT = StVal.getValueType();
9389 if (St->isTruncatingStore() && VT.isVector()) {
9390 SelectionDAG &DAG = DCI.DAG;
9391 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
9392 EVT StVT = St->getMemoryVT();
9393 unsigned NumElems = VT.getVectorNumElements();
9394 assert(StVT != VT && "Cannot truncate to the same type");
9395 unsigned FromEltSz = VT.getVectorElementType().getSizeInBits();
9396 unsigned ToEltSz = StVT.getVectorElementType().getSizeInBits();
9398 // From, To sizes and ElemCount must be pow of two
9399 if (!isPowerOf2_32(NumElems * FromEltSz * ToEltSz)) return SDValue();
9401 // We are going to use the original vector elt for storing.
9402 // Accumulated smaller vector elements must be a multiple of the store size.
9403 if (0 != (NumElems * FromEltSz) % ToEltSz) return SDValue();
9405 unsigned SizeRatio = FromEltSz / ToEltSz;
9406 assert(SizeRatio * NumElems * ToEltSz == VT.getSizeInBits());
9408 // Create a type on which we perform the shuffle.
9409 EVT WideVecVT = EVT::getVectorVT(*DAG.getContext(), StVT.getScalarType(),
9410 NumElems*SizeRatio);
9411 assert(WideVecVT.getSizeInBits() == VT.getSizeInBits());
9414 SDValue WideVec = DAG.getNode(ISD::BITCAST, DL, WideVecVT, StVal);
9415 SmallVector<int, 8> ShuffleVec(NumElems * SizeRatio, -1);
9416 for (unsigned i = 0; i < NumElems; ++i)
9417 ShuffleVec[i] = DAG.getDataLayout().isBigEndian()
9418 ? (i + 1) * SizeRatio - 1
9421 // Can't shuffle using an illegal type.
9422 if (!TLI.isTypeLegal(WideVecVT)) return SDValue();
9424 SDValue Shuff = DAG.getVectorShuffle(WideVecVT, DL, WideVec,
9425 DAG.getUNDEF(WideVec.getValueType()),
9427 // At this point all of the data is stored at the bottom of the
9428 // register. We now need to save it to mem.
9430 // Find the largest store unit
9431 MVT StoreType = MVT::i8;
9432 for (MVT Tp : MVT::integer_valuetypes()) {
9433 if (TLI.isTypeLegal(Tp) && Tp.getSizeInBits() <= NumElems * ToEltSz)
9436 // Didn't find a legal store type.
9437 if (!TLI.isTypeLegal(StoreType))
9440 // Bitcast the original vector into a vector of store-size units
9441 EVT StoreVecVT = EVT::getVectorVT(*DAG.getContext(),
9442 StoreType, VT.getSizeInBits()/EVT(StoreType).getSizeInBits());
9443 assert(StoreVecVT.getSizeInBits() == VT.getSizeInBits());
9444 SDValue ShuffWide = DAG.getNode(ISD::BITCAST, DL, StoreVecVT, Shuff);
9445 SmallVector<SDValue, 8> Chains;
9446 SDValue Increment = DAG.getConstant(StoreType.getSizeInBits() / 8, DL,
9447 TLI.getPointerTy(DAG.getDataLayout()));
9448 SDValue BasePtr = St->getBasePtr();
9450 // Perform one or more big stores into memory.
9451 unsigned E = (ToEltSz*NumElems)/StoreType.getSizeInBits();
9452 for (unsigned I = 0; I < E; I++) {
9453 SDValue SubVec = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL,
9454 StoreType, ShuffWide,
9455 DAG.getIntPtrConstant(I, DL));
9456 SDValue Ch = DAG.getStore(St->getChain(), DL, SubVec, BasePtr,
9457 St->getPointerInfo(), St->isVolatile(),
9458 St->isNonTemporal(), St->getAlignment());
9459 BasePtr = DAG.getNode(ISD::ADD, DL, BasePtr.getValueType(), BasePtr,
9461 Chains.push_back(Ch);
9463 return DAG.getNode(ISD::TokenFactor, DL, MVT::Other, Chains);
9466 if (!ISD::isNormalStore(St))
9469 // Split a store of a VMOVDRR into two integer stores to avoid mixing NEON and
9470 // ARM stores of arguments in the same cache line.
9471 if (StVal.getNode()->getOpcode() == ARMISD::VMOVDRR &&
9472 StVal.getNode()->hasOneUse()) {
9473 SelectionDAG &DAG = DCI.DAG;
9474 bool isBigEndian = DAG.getDataLayout().isBigEndian();
9476 SDValue BasePtr = St->getBasePtr();
9477 SDValue NewST1 = DAG.getStore(St->getChain(), DL,
9478 StVal.getNode()->getOperand(isBigEndian ? 1 : 0 ),
9479 BasePtr, St->getPointerInfo(), St->isVolatile(),
9480 St->isNonTemporal(), St->getAlignment());
9482 SDValue OffsetPtr = DAG.getNode(ISD::ADD, DL, MVT::i32, BasePtr,
9483 DAG.getConstant(4, DL, MVT::i32));
9484 return DAG.getStore(NewST1.getValue(0), DL,
9485 StVal.getNode()->getOperand(isBigEndian ? 0 : 1),
9486 OffsetPtr, St->getPointerInfo(), St->isVolatile(),
9487 St->isNonTemporal(),
9488 std::min(4U, St->getAlignment() / 2));
9491 if (StVal.getValueType() == MVT::i64 &&
9492 StVal.getNode()->getOpcode() == ISD::EXTRACT_VECTOR_ELT) {
9494 // Bitcast an i64 store extracted from a vector to f64.
9495 // Otherwise, the i64 value will be legalized to a pair of i32 values.
9496 SelectionDAG &DAG = DCI.DAG;
9498 SDValue IntVec = StVal.getOperand(0);
9499 EVT FloatVT = EVT::getVectorVT(*DAG.getContext(), MVT::f64,
9500 IntVec.getValueType().getVectorNumElements());
9501 SDValue Vec = DAG.getNode(ISD::BITCAST, dl, FloatVT, IntVec);
9502 SDValue ExtElt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64,
9503 Vec, StVal.getOperand(1));
9505 SDValue V = DAG.getNode(ISD::BITCAST, dl, MVT::i64, ExtElt);
9506 // Make the DAGCombiner fold the bitcasts.
9507 DCI.AddToWorklist(Vec.getNode());
9508 DCI.AddToWorklist(ExtElt.getNode());
9509 DCI.AddToWorklist(V.getNode());
9510 return DAG.getStore(St->getChain(), dl, V, St->getBasePtr(),
9511 St->getPointerInfo(), St->isVolatile(),
9512 St->isNonTemporal(), St->getAlignment(),
9516 // If this is a legal vector store, try to combine it into a VST1_UPD.
9517 if (ISD::isNormalStore(N) && VT.isVector() &&
9518 DCI.DAG.getTargetLoweringInfo().isTypeLegal(VT))
9519 return CombineBaseUpdate(N, DCI);
9524 // isConstVecPow2 - Return true if each vector element is a power of 2, all
9525 // elements are the same constant, C, and Log2(C) ranges from 1 to 32.
9526 static bool isConstVecPow2(SDValue ConstVec, bool isSigned, uint64_t &C)
9530 for (unsigned I = 0, E = ConstVec.getValueType().getVectorNumElements();
9532 ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(ConstVec.getOperand(I));
9537 APFloat APF = C->getValueAPF();
9538 if (APF.convertToInteger(&cN, 64, isSigned, APFloat::rmTowardZero, &isExact)
9539 != APFloat::opOK || !isExact)
9542 c0 = (I == 0) ? cN : c0;
9543 if (!isPowerOf2_64(cN) || c0 != cN || Log2_64(c0) < 1 || Log2_64(c0) > 32)
9550 /// PerformVCVTCombine - VCVT (floating-point to fixed-point, Advanced SIMD)
9551 /// can replace combinations of VMUL and VCVT (floating-point to integer)
9552 /// when the VMUL has a constant operand that is a power of 2.
9554 /// Example (assume d17 = <float 8.000000e+00, float 8.000000e+00>):
9555 /// vmul.f32 d16, d17, d16
9556 /// vcvt.s32.f32 d16, d16
9558 /// vcvt.s32.f32 d16, d16, #3
9559 static SDValue PerformVCVTCombine(SDNode *N,
9560 TargetLowering::DAGCombinerInfo &DCI,
9561 const ARMSubtarget *Subtarget) {
9562 SelectionDAG &DAG = DCI.DAG;
9563 SDValue Op = N->getOperand(0);
9565 if (!Subtarget->hasNEON() || !Op.getValueType().isVector() ||
9566 Op.getOpcode() != ISD::FMUL)
9570 SDValue N0 = Op->getOperand(0);
9571 SDValue ConstVec = Op->getOperand(1);
9572 bool isSigned = N->getOpcode() == ISD::FP_TO_SINT;
9574 if (ConstVec.getOpcode() != ISD::BUILD_VECTOR ||
9575 !isConstVecPow2(ConstVec, isSigned, C))
9578 MVT FloatTy = Op.getSimpleValueType().getVectorElementType();
9579 MVT IntTy = N->getSimpleValueType(0).getVectorElementType();
9580 unsigned NumLanes = Op.getValueType().getVectorNumElements();
9581 if (FloatTy.getSizeInBits() != 32 || IntTy.getSizeInBits() > 32 ||
9583 // These instructions only exist converting from f32 to i32. We can handle
9584 // smaller integers by generating an extra truncate, but larger ones would
9585 // be lossy. We also can't handle more then 4 lanes, since these intructions
9586 // only support v2i32/v4i32 types.
9591 unsigned IntrinsicOpcode = isSigned ? Intrinsic::arm_neon_vcvtfp2fxs :
9592 Intrinsic::arm_neon_vcvtfp2fxu;
9593 SDValue FixConv = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl,
9594 NumLanes == 2 ? MVT::v2i32 : MVT::v4i32,
9595 DAG.getConstant(IntrinsicOpcode, dl, MVT::i32),
9597 DAG.getConstant(Log2_64(C), dl, MVT::i32));
9599 if (IntTy.getSizeInBits() < FloatTy.getSizeInBits())
9600 FixConv = DAG.getNode(ISD::TRUNCATE, dl, N->getValueType(0), FixConv);
9605 /// PerformVDIVCombine - VCVT (fixed-point to floating-point, Advanced SIMD)
9606 /// can replace combinations of VCVT (integer to floating-point) and VDIV
9607 /// when the VDIV has a constant operand that is a power of 2.
9609 /// Example (assume d17 = <float 8.000000e+00, float 8.000000e+00>):
9610 /// vcvt.f32.s32 d16, d16
9611 /// vdiv.f32 d16, d17, d16
9613 /// vcvt.f32.s32 d16, d16, #3
9614 static SDValue PerformVDIVCombine(SDNode *N,
9615 TargetLowering::DAGCombinerInfo &DCI,
9616 const ARMSubtarget *Subtarget) {
9617 SelectionDAG &DAG = DCI.DAG;
9618 SDValue Op = N->getOperand(0);
9619 unsigned OpOpcode = Op.getNode()->getOpcode();
9621 if (!Subtarget->hasNEON() || !N->getValueType(0).isVector() ||
9622 (OpOpcode != ISD::SINT_TO_FP && OpOpcode != ISD::UINT_TO_FP))
9626 SDValue ConstVec = N->getOperand(1);
9627 bool isSigned = OpOpcode == ISD::SINT_TO_FP;
9629 if (ConstVec.getOpcode() != ISD::BUILD_VECTOR ||
9630 !isConstVecPow2(ConstVec, isSigned, C))
9633 MVT FloatTy = N->getSimpleValueType(0).getVectorElementType();
9634 MVT IntTy = Op.getOperand(0).getSimpleValueType().getVectorElementType();
9635 if (FloatTy.getSizeInBits() != 32 || IntTy.getSizeInBits() > 32) {
9636 // These instructions only exist converting from i32 to f32. We can handle
9637 // smaller integers by generating an extra extend, but larger ones would
9643 SDValue ConvInput = Op.getOperand(0);
9644 unsigned NumLanes = Op.getValueType().getVectorNumElements();
9645 if (IntTy.getSizeInBits() < FloatTy.getSizeInBits())
9646 ConvInput = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND,
9647 dl, NumLanes == 2 ? MVT::v2i32 : MVT::v4i32,
9650 unsigned IntrinsicOpcode = isSigned ? Intrinsic::arm_neon_vcvtfxs2fp :
9651 Intrinsic::arm_neon_vcvtfxu2fp;
9652 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl,
9654 DAG.getConstant(IntrinsicOpcode, dl, MVT::i32),
9655 ConvInput, DAG.getConstant(Log2_64(C), dl, MVT::i32));
9658 /// Getvshiftimm - Check if this is a valid build_vector for the immediate
9659 /// operand of a vector shift operation, where all the elements of the
9660 /// build_vector must have the same constant integer value.
9661 static bool getVShiftImm(SDValue Op, unsigned ElementBits, int64_t &Cnt) {
9662 // Ignore bit_converts.
9663 while (Op.getOpcode() == ISD::BITCAST)
9664 Op = Op.getOperand(0);
9665 BuildVectorSDNode *BVN = dyn_cast<BuildVectorSDNode>(Op.getNode());
9666 APInt SplatBits, SplatUndef;
9667 unsigned SplatBitSize;
9669 if (! BVN || ! BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize,
9670 HasAnyUndefs, ElementBits) ||
9671 SplatBitSize > ElementBits)
9673 Cnt = SplatBits.getSExtValue();
9677 /// isVShiftLImm - Check if this is a valid build_vector for the immediate
9678 /// operand of a vector shift left operation. That value must be in the range:
9679 /// 0 <= Value < ElementBits for a left shift; or
9680 /// 0 <= Value <= ElementBits for a long left shift.
9681 static bool isVShiftLImm(SDValue Op, EVT VT, bool isLong, int64_t &Cnt) {
9682 assert(VT.isVector() && "vector shift count is not a vector type");
9683 unsigned ElementBits = VT.getVectorElementType().getSizeInBits();
9684 if (! getVShiftImm(Op, ElementBits, Cnt))
9686 return (Cnt >= 0 && (isLong ? Cnt-1 : Cnt) < ElementBits);
9689 /// isVShiftRImm - Check if this is a valid build_vector for the immediate
9690 /// operand of a vector shift right operation. For a shift opcode, the value
9691 /// is positive, but for an intrinsic the value count must be negative. The
9692 /// absolute value must be in the range:
9693 /// 1 <= |Value| <= ElementBits for a right shift; or
9694 /// 1 <= |Value| <= ElementBits/2 for a narrow right shift.
9695 static bool isVShiftRImm(SDValue Op, EVT VT, bool isNarrow, bool isIntrinsic,
9697 assert(VT.isVector() && "vector shift count is not a vector type");
9698 unsigned ElementBits = VT.getVectorElementType().getSizeInBits();
9699 if (! getVShiftImm(Op, ElementBits, Cnt))
9703 return (Cnt >= 1 && Cnt <= (isNarrow ? ElementBits/2 : ElementBits));
9706 /// PerformIntrinsicCombine - ARM-specific DAG combining for intrinsics.
9707 static SDValue PerformIntrinsicCombine(SDNode *N, SelectionDAG &DAG) {
9708 unsigned IntNo = cast<ConstantSDNode>(N->getOperand(0))->getZExtValue();
9711 // Don't do anything for most intrinsics.
9714 // Vector shifts: check for immediate versions and lower them.
9715 // Note: This is done during DAG combining instead of DAG legalizing because
9716 // the build_vectors for 64-bit vector element shift counts are generally
9717 // not legal, and it is hard to see their values after they get legalized to
9718 // loads from a constant pool.
9719 case Intrinsic::arm_neon_vshifts:
9720 case Intrinsic::arm_neon_vshiftu:
9721 case Intrinsic::arm_neon_vrshifts:
9722 case Intrinsic::arm_neon_vrshiftu:
9723 case Intrinsic::arm_neon_vrshiftn:
9724 case Intrinsic::arm_neon_vqshifts:
9725 case Intrinsic::arm_neon_vqshiftu:
9726 case Intrinsic::arm_neon_vqshiftsu:
9727 case Intrinsic::arm_neon_vqshiftns:
9728 case Intrinsic::arm_neon_vqshiftnu:
9729 case Intrinsic::arm_neon_vqshiftnsu:
9730 case Intrinsic::arm_neon_vqrshiftns:
9731 case Intrinsic::arm_neon_vqrshiftnu:
9732 case Intrinsic::arm_neon_vqrshiftnsu: {
9733 EVT VT = N->getOperand(1).getValueType();
9735 unsigned VShiftOpc = 0;
9738 case Intrinsic::arm_neon_vshifts:
9739 case Intrinsic::arm_neon_vshiftu:
9740 if (isVShiftLImm(N->getOperand(2), VT, false, Cnt)) {
9741 VShiftOpc = ARMISD::VSHL;
9744 if (isVShiftRImm(N->getOperand(2), VT, false, true, Cnt)) {
9745 VShiftOpc = (IntNo == Intrinsic::arm_neon_vshifts ?
9746 ARMISD::VSHRs : ARMISD::VSHRu);
9751 case Intrinsic::arm_neon_vrshifts:
9752 case Intrinsic::arm_neon_vrshiftu:
9753 if (isVShiftRImm(N->getOperand(2), VT, false, true, Cnt))
9757 case Intrinsic::arm_neon_vqshifts:
9758 case Intrinsic::arm_neon_vqshiftu:
9759 if (isVShiftLImm(N->getOperand(2), VT, false, Cnt))
9763 case Intrinsic::arm_neon_vqshiftsu:
9764 if (isVShiftLImm(N->getOperand(2), VT, false, Cnt))
9766 llvm_unreachable("invalid shift count for vqshlu intrinsic");
9768 case Intrinsic::arm_neon_vrshiftn:
9769 case Intrinsic::arm_neon_vqshiftns:
9770 case Intrinsic::arm_neon_vqshiftnu:
9771 case Intrinsic::arm_neon_vqshiftnsu:
9772 case Intrinsic::arm_neon_vqrshiftns:
9773 case Intrinsic::arm_neon_vqrshiftnu:
9774 case Intrinsic::arm_neon_vqrshiftnsu:
9775 // Narrowing shifts require an immediate right shift.
9776 if (isVShiftRImm(N->getOperand(2), VT, true, true, Cnt))
9778 llvm_unreachable("invalid shift count for narrowing vector shift "
9782 llvm_unreachable("unhandled vector shift");
9786 case Intrinsic::arm_neon_vshifts:
9787 case Intrinsic::arm_neon_vshiftu:
9788 // Opcode already set above.
9790 case Intrinsic::arm_neon_vrshifts:
9791 VShiftOpc = ARMISD::VRSHRs; break;
9792 case Intrinsic::arm_neon_vrshiftu:
9793 VShiftOpc = ARMISD::VRSHRu; break;
9794 case Intrinsic::arm_neon_vrshiftn:
9795 VShiftOpc = ARMISD::VRSHRN; break;
9796 case Intrinsic::arm_neon_vqshifts:
9797 VShiftOpc = ARMISD::VQSHLs; break;
9798 case Intrinsic::arm_neon_vqshiftu:
9799 VShiftOpc = ARMISD::VQSHLu; break;
9800 case Intrinsic::arm_neon_vqshiftsu:
9801 VShiftOpc = ARMISD::VQSHLsu; break;
9802 case Intrinsic::arm_neon_vqshiftns:
9803 VShiftOpc = ARMISD::VQSHRNs; break;
9804 case Intrinsic::arm_neon_vqshiftnu:
9805 VShiftOpc = ARMISD::VQSHRNu; break;
9806 case Intrinsic::arm_neon_vqshiftnsu:
9807 VShiftOpc = ARMISD::VQSHRNsu; break;
9808 case Intrinsic::arm_neon_vqrshiftns:
9809 VShiftOpc = ARMISD::VQRSHRNs; break;
9810 case Intrinsic::arm_neon_vqrshiftnu:
9811 VShiftOpc = ARMISD::VQRSHRNu; break;
9812 case Intrinsic::arm_neon_vqrshiftnsu:
9813 VShiftOpc = ARMISD::VQRSHRNsu; break;
9817 return DAG.getNode(VShiftOpc, dl, N->getValueType(0),
9818 N->getOperand(1), DAG.getConstant(Cnt, dl, MVT::i32));
9821 case Intrinsic::arm_neon_vshiftins: {
9822 EVT VT = N->getOperand(1).getValueType();
9824 unsigned VShiftOpc = 0;
9826 if (isVShiftLImm(N->getOperand(3), VT, false, Cnt))
9827 VShiftOpc = ARMISD::VSLI;
9828 else if (isVShiftRImm(N->getOperand(3), VT, false, true, Cnt))
9829 VShiftOpc = ARMISD::VSRI;
9831 llvm_unreachable("invalid shift count for vsli/vsri intrinsic");
9835 return DAG.getNode(VShiftOpc, dl, N->getValueType(0),
9836 N->getOperand(1), N->getOperand(2),
9837 DAG.getConstant(Cnt, dl, MVT::i32));
9840 case Intrinsic::arm_neon_vqrshifts:
9841 case Intrinsic::arm_neon_vqrshiftu:
9842 // No immediate versions of these to check for.
9849 /// PerformShiftCombine - Checks for immediate versions of vector shifts and
9850 /// lowers them. As with the vector shift intrinsics, this is done during DAG
9851 /// combining instead of DAG legalizing because the build_vectors for 64-bit
9852 /// vector element shift counts are generally not legal, and it is hard to see
9853 /// their values after they get legalized to loads from a constant pool.
9854 static SDValue PerformShiftCombine(SDNode *N, SelectionDAG &DAG,
9855 const ARMSubtarget *ST) {
9856 EVT VT = N->getValueType(0);
9857 if (N->getOpcode() == ISD::SRL && VT == MVT::i32 && ST->hasV6Ops()) {
9858 // Canonicalize (srl (bswap x), 16) to (rotr (bswap x), 16) if the high
9859 // 16-bits of x is zero. This optimizes rev + lsr 16 to rev16.
9860 SDValue N1 = N->getOperand(1);
9861 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(N1)) {
9862 SDValue N0 = N->getOperand(0);
9863 if (C->getZExtValue() == 16 && N0.getOpcode() == ISD::BSWAP &&
9864 DAG.MaskedValueIsZero(N0.getOperand(0),
9865 APInt::getHighBitsSet(32, 16)))
9866 return DAG.getNode(ISD::ROTR, SDLoc(N), VT, N0, N1);
9870 // Nothing to be done for scalar shifts.
9871 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
9872 if (!VT.isVector() || !TLI.isTypeLegal(VT))
9875 assert(ST->hasNEON() && "unexpected vector shift");
9878 switch (N->getOpcode()) {
9879 default: llvm_unreachable("unexpected shift opcode");
9882 if (isVShiftLImm(N->getOperand(1), VT, false, Cnt)) {
9884 return DAG.getNode(ARMISD::VSHL, dl, VT, N->getOperand(0),
9885 DAG.getConstant(Cnt, dl, MVT::i32));
9891 if (isVShiftRImm(N->getOperand(1), VT, false, false, Cnt)) {
9892 unsigned VShiftOpc = (N->getOpcode() == ISD::SRA ?
9893 ARMISD::VSHRs : ARMISD::VSHRu);
9895 return DAG.getNode(VShiftOpc, dl, VT, N->getOperand(0),
9896 DAG.getConstant(Cnt, dl, MVT::i32));
9902 /// PerformExtendCombine - Target-specific DAG combining for ISD::SIGN_EXTEND,
9903 /// ISD::ZERO_EXTEND, and ISD::ANY_EXTEND.
9904 static SDValue PerformExtendCombine(SDNode *N, SelectionDAG &DAG,
9905 const ARMSubtarget *ST) {
9906 SDValue N0 = N->getOperand(0);
9908 // Check for sign- and zero-extensions of vector extract operations of 8-
9909 // and 16-bit vector elements. NEON supports these directly. They are
9910 // handled during DAG combining because type legalization will promote them
9911 // to 32-bit types and it is messy to recognize the operations after that.
9912 if (ST->hasNEON() && N0.getOpcode() == ISD::EXTRACT_VECTOR_ELT) {
9913 SDValue Vec = N0.getOperand(0);
9914 SDValue Lane = N0.getOperand(1);
9915 EVT VT = N->getValueType(0);
9916 EVT EltVT = N0.getValueType();
9917 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
9919 if (VT == MVT::i32 &&
9920 (EltVT == MVT::i8 || EltVT == MVT::i16) &&
9921 TLI.isTypeLegal(Vec.getValueType()) &&
9922 isa<ConstantSDNode>(Lane)) {
9925 switch (N->getOpcode()) {
9926 default: llvm_unreachable("unexpected opcode");
9927 case ISD::SIGN_EXTEND:
9928 Opc = ARMISD::VGETLANEs;
9930 case ISD::ZERO_EXTEND:
9931 case ISD::ANY_EXTEND:
9932 Opc = ARMISD::VGETLANEu;
9935 return DAG.getNode(Opc, SDLoc(N), VT, Vec, Lane);
9942 /// PerformSELECT_CCCombine - Target-specific DAG combining for ISD::SELECT_CC
9943 /// to match f32 max/min patterns to use NEON vmax/vmin instructions.
9944 static SDValue PerformSELECT_CCCombine(SDNode *N, SelectionDAG &DAG,
9945 const ARMSubtarget *ST) {
9946 // If the target supports NEON, try to use vmax/vmin instructions for f32
9947 // selects like "x < y ? x : y". Unless the NoNaNsFPMath option is set,
9948 // be careful about NaNs: NEON's vmax/vmin return NaN if either operand is
9949 // a NaN; only do the transformation when it matches that behavior.
9951 // For now only do this when using NEON for FP operations; if using VFP, it
9952 // is not obvious that the benefit outweighs the cost of switching to the
9954 if (!ST->hasNEON() || !ST->useNEONForSinglePrecisionFP() ||
9955 N->getValueType(0) != MVT::f32)
9958 SDValue CondLHS = N->getOperand(0);
9959 SDValue CondRHS = N->getOperand(1);
9960 SDValue LHS = N->getOperand(2);
9961 SDValue RHS = N->getOperand(3);
9962 ISD::CondCode CC = cast<CondCodeSDNode>(N->getOperand(4))->get();
9964 unsigned Opcode = 0;
9966 if (DAG.isEqualTo(LHS, CondLHS) && DAG.isEqualTo(RHS, CondRHS)) {
9967 IsReversed = false; // x CC y ? x : y
9968 } else if (DAG.isEqualTo(LHS, CondRHS) && DAG.isEqualTo(RHS, CondLHS)) {
9969 IsReversed = true ; // x CC y ? y : x
9983 // If LHS is NaN, an ordered comparison will be false and the result will
9984 // be the RHS, but vmin(NaN, RHS) = NaN. Avoid this by checking that LHS
9985 // != NaN. Likewise, for unordered comparisons, check for RHS != NaN.
9986 IsUnordered = (CC == ISD::SETULT || CC == ISD::SETULE);
9987 if (!DAG.isKnownNeverNaN(IsUnordered ? RHS : LHS))
9989 // For less-than-or-equal comparisons, "+0 <= -0" will be true but vmin
9990 // will return -0, so vmin can only be used for unsafe math or if one of
9991 // the operands is known to be nonzero.
9992 if ((CC == ISD::SETLE || CC == ISD::SETOLE || CC == ISD::SETULE) &&
9993 !DAG.getTarget().Options.UnsafeFPMath &&
9994 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS)))
9996 Opcode = IsReversed ? ARMISD::FMAX : ARMISD::FMIN;
10005 // If LHS is NaN, an ordered comparison will be false and the result will
10006 // be the RHS, but vmax(NaN, RHS) = NaN. Avoid this by checking that LHS
10007 // != NaN. Likewise, for unordered comparisons, check for RHS != NaN.
10008 IsUnordered = (CC == ISD::SETUGT || CC == ISD::SETUGE);
10009 if (!DAG.isKnownNeverNaN(IsUnordered ? RHS : LHS))
10011 // For greater-than-or-equal comparisons, "-0 >= +0" will be true but vmax
10012 // will return +0, so vmax can only be used for unsafe math or if one of
10013 // the operands is known to be nonzero.
10014 if ((CC == ISD::SETGE || CC == ISD::SETOGE || CC == ISD::SETUGE) &&
10015 !DAG.getTarget().Options.UnsafeFPMath &&
10016 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS)))
10018 Opcode = IsReversed ? ARMISD::FMIN : ARMISD::FMAX;
10024 return DAG.getNode(Opcode, SDLoc(N), N->getValueType(0), LHS, RHS);
10027 /// PerformCMOVCombine - Target-specific DAG combining for ARMISD::CMOV.
10029 ARMTargetLowering::PerformCMOVCombine(SDNode *N, SelectionDAG &DAG) const {
10030 SDValue Cmp = N->getOperand(4);
10031 if (Cmp.getOpcode() != ARMISD::CMPZ)
10032 // Only looking at EQ and NE cases.
10035 EVT VT = N->getValueType(0);
10037 SDValue LHS = Cmp.getOperand(0);
10038 SDValue RHS = Cmp.getOperand(1);
10039 SDValue FalseVal = N->getOperand(0);
10040 SDValue TrueVal = N->getOperand(1);
10041 SDValue ARMcc = N->getOperand(2);
10042 ARMCC::CondCodes CC =
10043 (ARMCC::CondCodes)cast<ConstantSDNode>(ARMcc)->getZExtValue();
10061 /// FIXME: Turn this into a target neutral optimization?
10063 if (CC == ARMCC::NE && FalseVal == RHS && FalseVal != LHS) {
10064 Res = DAG.getNode(ARMISD::CMOV, dl, VT, LHS, TrueVal, ARMcc,
10065 N->getOperand(3), Cmp);
10066 } else if (CC == ARMCC::EQ && TrueVal == RHS) {
10068 SDValue NewCmp = getARMCmp(LHS, RHS, ISD::SETNE, ARMcc, DAG, dl);
10069 Res = DAG.getNode(ARMISD::CMOV, dl, VT, LHS, FalseVal, ARMcc,
10070 N->getOperand(3), NewCmp);
10073 if (Res.getNode()) {
10074 APInt KnownZero, KnownOne;
10075 DAG.computeKnownBits(SDValue(N,0), KnownZero, KnownOne);
10076 // Capture demanded bits information that would be otherwise lost.
10077 if (KnownZero == 0xfffffffe)
10078 Res = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Res,
10079 DAG.getValueType(MVT::i1));
10080 else if (KnownZero == 0xffffff00)
10081 Res = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Res,
10082 DAG.getValueType(MVT::i8));
10083 else if (KnownZero == 0xffff0000)
10084 Res = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Res,
10085 DAG.getValueType(MVT::i16));
10091 SDValue ARMTargetLowering::PerformDAGCombine(SDNode *N,
10092 DAGCombinerInfo &DCI) const {
10093 switch (N->getOpcode()) {
10095 case ISD::ADDC: return PerformADDCCombine(N, DCI, Subtarget);
10096 case ISD::ADD: return PerformADDCombine(N, DCI, Subtarget);
10097 case ISD::SUB: return PerformSUBCombine(N, DCI);
10098 case ISD::MUL: return PerformMULCombine(N, DCI, Subtarget);
10099 case ISD::OR: return PerformORCombine(N, DCI, Subtarget);
10100 case ISD::XOR: return PerformXORCombine(N, DCI, Subtarget);
10101 case ISD::AND: return PerformANDCombine(N, DCI, Subtarget);
10102 case ARMISD::BFI: return PerformBFICombine(N, DCI);
10103 case ARMISD::VMOVRRD: return PerformVMOVRRDCombine(N, DCI, Subtarget);
10104 case ARMISD::VMOVDRR: return PerformVMOVDRRCombine(N, DCI.DAG);
10105 case ISD::STORE: return PerformSTORECombine(N, DCI);
10106 case ISD::BUILD_VECTOR: return PerformBUILD_VECTORCombine(N, DCI, Subtarget);
10107 case ISD::INSERT_VECTOR_ELT: return PerformInsertEltCombine(N, DCI);
10108 case ISD::VECTOR_SHUFFLE: return PerformVECTOR_SHUFFLECombine(N, DCI.DAG);
10109 case ARMISD::VDUPLANE: return PerformVDUPLANECombine(N, DCI);
10110 case ISD::FP_TO_SINT:
10111 case ISD::FP_TO_UINT: return PerformVCVTCombine(N, DCI, Subtarget);
10112 case ISD::FDIV: return PerformVDIVCombine(N, DCI, Subtarget);
10113 case ISD::INTRINSIC_WO_CHAIN: return PerformIntrinsicCombine(N, DCI.DAG);
10116 case ISD::SRL: return PerformShiftCombine(N, DCI.DAG, Subtarget);
10117 case ISD::SIGN_EXTEND:
10118 case ISD::ZERO_EXTEND:
10119 case ISD::ANY_EXTEND: return PerformExtendCombine(N, DCI.DAG, Subtarget);
10120 case ISD::SELECT_CC: return PerformSELECT_CCCombine(N, DCI.DAG, Subtarget);
10121 case ARMISD::CMOV: return PerformCMOVCombine(N, DCI.DAG);
10122 case ISD::LOAD: return PerformLOADCombine(N, DCI);
10123 case ARMISD::VLD2DUP:
10124 case ARMISD::VLD3DUP:
10125 case ARMISD::VLD4DUP:
10126 return PerformVLDCombine(N, DCI);
10127 case ARMISD::BUILD_VECTOR:
10128 return PerformARMBUILD_VECTORCombine(N, DCI);
10129 case ISD::INTRINSIC_VOID:
10130 case ISD::INTRINSIC_W_CHAIN:
10131 switch (cast<ConstantSDNode>(N->getOperand(1))->getZExtValue()) {
10132 case Intrinsic::arm_neon_vld1:
10133 case Intrinsic::arm_neon_vld2:
10134 case Intrinsic::arm_neon_vld3:
10135 case Intrinsic::arm_neon_vld4:
10136 case Intrinsic::arm_neon_vld2lane:
10137 case Intrinsic::arm_neon_vld3lane:
10138 case Intrinsic::arm_neon_vld4lane:
10139 case Intrinsic::arm_neon_vst1:
10140 case Intrinsic::arm_neon_vst2:
10141 case Intrinsic::arm_neon_vst3:
10142 case Intrinsic::arm_neon_vst4:
10143 case Intrinsic::arm_neon_vst2lane:
10144 case Intrinsic::arm_neon_vst3lane:
10145 case Intrinsic::arm_neon_vst4lane:
10146 return PerformVLDCombine(N, DCI);
10154 bool ARMTargetLowering::isDesirableToTransformToIntegerOp(unsigned Opc,
10156 return (VT == MVT::f32) && (Opc == ISD::LOAD || Opc == ISD::STORE);
10159 bool ARMTargetLowering::allowsMisalignedMemoryAccesses(EVT VT,
10162 bool *Fast) const {
10163 // The AllowsUnaliged flag models the SCTLR.A setting in ARM cpus
10164 bool AllowsUnaligned = Subtarget->allowsUnalignedMem();
10166 switch (VT.getSimpleVT().SimpleTy) {
10172 // Unaligned access can use (for example) LRDB, LRDH, LDR
10173 if (AllowsUnaligned) {
10175 *Fast = Subtarget->hasV7Ops();
10182 // For any little-endian targets with neon, we can support unaligned ld/st
10183 // of D and Q (e.g. {D0,D1}) registers by using vld1.i8/vst1.i8.
10184 // A big-endian target may also explicitly support unaligned accesses
10185 if (Subtarget->hasNEON() && (AllowsUnaligned || Subtarget->isLittle())) {
10195 static bool memOpAlign(unsigned DstAlign, unsigned SrcAlign,
10196 unsigned AlignCheck) {
10197 return ((SrcAlign == 0 || SrcAlign % AlignCheck == 0) &&
10198 (DstAlign == 0 || DstAlign % AlignCheck == 0));
10201 EVT ARMTargetLowering::getOptimalMemOpType(uint64_t Size,
10202 unsigned DstAlign, unsigned SrcAlign,
10203 bool IsMemset, bool ZeroMemset,
10205 MachineFunction &MF) const {
10206 const Function *F = MF.getFunction();
10208 // See if we can use NEON instructions for this...
10209 if ((!IsMemset || ZeroMemset) && Subtarget->hasNEON() &&
10210 !F->hasFnAttribute(Attribute::NoImplicitFloat)) {
10213 (memOpAlign(SrcAlign, DstAlign, 16) ||
10214 (allowsMisalignedMemoryAccesses(MVT::v2f64, 0, 1, &Fast) && Fast))) {
10216 } else if (Size >= 8 &&
10217 (memOpAlign(SrcAlign, DstAlign, 8) ||
10218 (allowsMisalignedMemoryAccesses(MVT::f64, 0, 1, &Fast) &&
10224 // Lowering to i32/i16 if the size permits.
10227 else if (Size >= 2)
10230 // Let the target-independent logic figure it out.
10234 bool ARMTargetLowering::isZExtFree(SDValue Val, EVT VT2) const {
10235 if (Val.getOpcode() != ISD::LOAD)
10238 EVT VT1 = Val.getValueType();
10239 if (!VT1.isSimple() || !VT1.isInteger() ||
10240 !VT2.isSimple() || !VT2.isInteger())
10243 switch (VT1.getSimpleVT().SimpleTy) {
10248 // 8-bit and 16-bit loads implicitly zero-extend to 32-bits.
10255 bool ARMTargetLowering::isVectorLoadExtDesirable(SDValue ExtVal) const {
10256 EVT VT = ExtVal.getValueType();
10258 if (!isTypeLegal(VT))
10261 // Don't create a loadext if we can fold the extension into a wide/long
10263 // If there's more than one user instruction, the loadext is desirable no
10264 // matter what. There can be two uses by the same instruction.
10265 if (ExtVal->use_empty() ||
10266 !ExtVal->use_begin()->isOnlyUserOf(ExtVal.getNode()))
10269 SDNode *U = *ExtVal->use_begin();
10270 if ((U->getOpcode() == ISD::ADD || U->getOpcode() == ISD::SUB ||
10271 U->getOpcode() == ISD::SHL || U->getOpcode() == ARMISD::VSHL))
10277 bool ARMTargetLowering::allowTruncateForTailCall(Type *Ty1, Type *Ty2) const {
10278 if (!Ty1->isIntegerTy() || !Ty2->isIntegerTy())
10281 if (!isTypeLegal(EVT::getEVT(Ty1)))
10284 assert(Ty1->getPrimitiveSizeInBits() <= 64 && "i128 is probably not a noop");
10286 // Assuming the caller doesn't have a zeroext or signext return parameter,
10287 // truncation all the way down to i1 is valid.
10292 static bool isLegalT1AddressImmediate(int64_t V, EVT VT) {
10296 unsigned Scale = 1;
10297 switch (VT.getSimpleVT().SimpleTy) {
10298 default: return false;
10313 if ((V & (Scale - 1)) != 0)
10316 return V == (V & ((1LL << 5) - 1));
10319 static bool isLegalT2AddressImmediate(int64_t V, EVT VT,
10320 const ARMSubtarget *Subtarget) {
10321 bool isNeg = false;
10327 switch (VT.getSimpleVT().SimpleTy) {
10328 default: return false;
10333 // + imm12 or - imm8
10335 return V == (V & ((1LL << 8) - 1));
10336 return V == (V & ((1LL << 12) - 1));
10339 // Same as ARM mode. FIXME: NEON?
10340 if (!Subtarget->hasVFP2())
10345 return V == (V & ((1LL << 8) - 1));
10349 /// isLegalAddressImmediate - Return true if the integer value can be used
10350 /// as the offset of the target addressing mode for load / store of the
10352 static bool isLegalAddressImmediate(int64_t V, EVT VT,
10353 const ARMSubtarget *Subtarget) {
10357 if (!VT.isSimple())
10360 if (Subtarget->isThumb1Only())
10361 return isLegalT1AddressImmediate(V, VT);
10362 else if (Subtarget->isThumb2())
10363 return isLegalT2AddressImmediate(V, VT, Subtarget);
10368 switch (VT.getSimpleVT().SimpleTy) {
10369 default: return false;
10374 return V == (V & ((1LL << 12) - 1));
10377 return V == (V & ((1LL << 8) - 1));
10380 if (!Subtarget->hasVFP2()) // FIXME: NEON?
10385 return V == (V & ((1LL << 8) - 1));
10389 bool ARMTargetLowering::isLegalT2ScaledAddressingMode(const AddrMode &AM,
10391 int Scale = AM.Scale;
10395 switch (VT.getSimpleVT().SimpleTy) {
10396 default: return false;
10404 Scale = Scale & ~1;
10405 return Scale == 2 || Scale == 4 || Scale == 8;
10408 if (((unsigned)AM.HasBaseReg + Scale) <= 2)
10412 // Note, we allow "void" uses (basically, uses that aren't loads or
10413 // stores), because arm allows folding a scale into many arithmetic
10414 // operations. This should be made more precise and revisited later.
10416 // Allow r << imm, but the imm has to be a multiple of two.
10417 if (Scale & 1) return false;
10418 return isPowerOf2_32(Scale);
10422 /// isLegalAddressingMode - Return true if the addressing mode represented
10423 /// by AM is legal for this target, for a load/store of the specified type.
10424 bool ARMTargetLowering::isLegalAddressingMode(const DataLayout &DL,
10425 const AddrMode &AM, Type *Ty,
10426 unsigned AS) const {
10427 EVT VT = getValueType(DL, Ty, true);
10428 if (!isLegalAddressImmediate(AM.BaseOffs, VT, Subtarget))
10431 // Can never fold addr of global into load/store.
10435 switch (AM.Scale) {
10436 case 0: // no scale reg, must be "r+i" or "r", or "i".
10439 if (Subtarget->isThumb1Only())
10443 // ARM doesn't support any R+R*scale+imm addr modes.
10447 if (!VT.isSimple())
10450 if (Subtarget->isThumb2())
10451 return isLegalT2ScaledAddressingMode(AM, VT);
10453 int Scale = AM.Scale;
10454 switch (VT.getSimpleVT().SimpleTy) {
10455 default: return false;
10459 if (Scale < 0) Scale = -Scale;
10463 return isPowerOf2_32(Scale & ~1);
10467 if (((unsigned)AM.HasBaseReg + Scale) <= 2)
10472 // Note, we allow "void" uses (basically, uses that aren't loads or
10473 // stores), because arm allows folding a scale into many arithmetic
10474 // operations. This should be made more precise and revisited later.
10476 // Allow r << imm, but the imm has to be a multiple of two.
10477 if (Scale & 1) return false;
10478 return isPowerOf2_32(Scale);
10484 /// isLegalICmpImmediate - Return true if the specified immediate is legal
10485 /// icmp immediate, that is the target has icmp instructions which can compare
10486 /// a register against the immediate without having to materialize the
10487 /// immediate into a register.
10488 bool ARMTargetLowering::isLegalICmpImmediate(int64_t Imm) const {
10489 // Thumb2 and ARM modes can use cmn for negative immediates.
10490 if (!Subtarget->isThumb())
10491 return ARM_AM::getSOImmVal(std::abs(Imm)) != -1;
10492 if (Subtarget->isThumb2())
10493 return ARM_AM::getT2SOImmVal(std::abs(Imm)) != -1;
10494 // Thumb1 doesn't have cmn, and only 8-bit immediates.
10495 return Imm >= 0 && Imm <= 255;
10498 /// isLegalAddImmediate - Return true if the specified immediate is a legal add
10499 /// *or sub* immediate, that is the target has add or sub instructions which can
10500 /// add a register with the immediate without having to materialize the
10501 /// immediate into a register.
10502 bool ARMTargetLowering::isLegalAddImmediate(int64_t Imm) const {
10503 // Same encoding for add/sub, just flip the sign.
10504 int64_t AbsImm = std::abs(Imm);
10505 if (!Subtarget->isThumb())
10506 return ARM_AM::getSOImmVal(AbsImm) != -1;
10507 if (Subtarget->isThumb2())
10508 return ARM_AM::getT2SOImmVal(AbsImm) != -1;
10509 // Thumb1 only has 8-bit unsigned immediate.
10510 return AbsImm >= 0 && AbsImm <= 255;
10513 static bool getARMIndexedAddressParts(SDNode *Ptr, EVT VT,
10514 bool isSEXTLoad, SDValue &Base,
10515 SDValue &Offset, bool &isInc,
10516 SelectionDAG &DAG) {
10517 if (Ptr->getOpcode() != ISD::ADD && Ptr->getOpcode() != ISD::SUB)
10520 if (VT == MVT::i16 || ((VT == MVT::i8 || VT == MVT::i1) && isSEXTLoad)) {
10521 // AddressingMode 3
10522 Base = Ptr->getOperand(0);
10523 if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(Ptr->getOperand(1))) {
10524 int RHSC = (int)RHS->getZExtValue();
10525 if (RHSC < 0 && RHSC > -256) {
10526 assert(Ptr->getOpcode() == ISD::ADD);
10528 Offset = DAG.getConstant(-RHSC, SDLoc(Ptr), RHS->getValueType(0));
10532 isInc = (Ptr->getOpcode() == ISD::ADD);
10533 Offset = Ptr->getOperand(1);
10535 } else if (VT == MVT::i32 || VT == MVT::i8 || VT == MVT::i1) {
10536 // AddressingMode 2
10537 if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(Ptr->getOperand(1))) {
10538 int RHSC = (int)RHS->getZExtValue();
10539 if (RHSC < 0 && RHSC > -0x1000) {
10540 assert(Ptr->getOpcode() == ISD::ADD);
10542 Offset = DAG.getConstant(-RHSC, SDLoc(Ptr), RHS->getValueType(0));
10543 Base = Ptr->getOperand(0);
10548 if (Ptr->getOpcode() == ISD::ADD) {
10550 ARM_AM::ShiftOpc ShOpcVal=
10551 ARM_AM::getShiftOpcForNode(Ptr->getOperand(0).getOpcode());
10552 if (ShOpcVal != ARM_AM::no_shift) {
10553 Base = Ptr->getOperand(1);
10554 Offset = Ptr->getOperand(0);
10556 Base = Ptr->getOperand(0);
10557 Offset = Ptr->getOperand(1);
10562 isInc = (Ptr->getOpcode() == ISD::ADD);
10563 Base = Ptr->getOperand(0);
10564 Offset = Ptr->getOperand(1);
10568 // FIXME: Use VLDM / VSTM to emulate indexed FP load / store.
10572 static bool getT2IndexedAddressParts(SDNode *Ptr, EVT VT,
10573 bool isSEXTLoad, SDValue &Base,
10574 SDValue &Offset, bool &isInc,
10575 SelectionDAG &DAG) {
10576 if (Ptr->getOpcode() != ISD::ADD && Ptr->getOpcode() != ISD::SUB)
10579 Base = Ptr->getOperand(0);
10580 if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(Ptr->getOperand(1))) {
10581 int RHSC = (int)RHS->getZExtValue();
10582 if (RHSC < 0 && RHSC > -0x100) { // 8 bits.
10583 assert(Ptr->getOpcode() == ISD::ADD);
10585 Offset = DAG.getConstant(-RHSC, SDLoc(Ptr), RHS->getValueType(0));
10587 } else if (RHSC > 0 && RHSC < 0x100) { // 8 bit, no zero.
10588 isInc = Ptr->getOpcode() == ISD::ADD;
10589 Offset = DAG.getConstant(RHSC, SDLoc(Ptr), RHS->getValueType(0));
10597 /// getPreIndexedAddressParts - returns true by value, base pointer and
10598 /// offset pointer and addressing mode by reference if the node's address
10599 /// can be legally represented as pre-indexed load / store address.
10601 ARMTargetLowering::getPreIndexedAddressParts(SDNode *N, SDValue &Base,
10603 ISD::MemIndexedMode &AM,
10604 SelectionDAG &DAG) const {
10605 if (Subtarget->isThumb1Only())
10610 bool isSEXTLoad = false;
10611 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) {
10612 Ptr = LD->getBasePtr();
10613 VT = LD->getMemoryVT();
10614 isSEXTLoad = LD->getExtensionType() == ISD::SEXTLOAD;
10615 } else if (StoreSDNode *ST = dyn_cast<StoreSDNode>(N)) {
10616 Ptr = ST->getBasePtr();
10617 VT = ST->getMemoryVT();
10622 bool isLegal = false;
10623 if (Subtarget->isThumb2())
10624 isLegal = getT2IndexedAddressParts(Ptr.getNode(), VT, isSEXTLoad, Base,
10625 Offset, isInc, DAG);
10627 isLegal = getARMIndexedAddressParts(Ptr.getNode(), VT, isSEXTLoad, Base,
10628 Offset, isInc, DAG);
10632 AM = isInc ? ISD::PRE_INC : ISD::PRE_DEC;
10636 /// getPostIndexedAddressParts - returns true by value, base pointer and
10637 /// offset pointer and addressing mode by reference if this node can be
10638 /// combined with a load / store to form a post-indexed load / store.
10639 bool ARMTargetLowering::getPostIndexedAddressParts(SDNode *N, SDNode *Op,
10642 ISD::MemIndexedMode &AM,
10643 SelectionDAG &DAG) const {
10644 if (Subtarget->isThumb1Only())
10649 bool isSEXTLoad = false;
10650 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) {
10651 VT = LD->getMemoryVT();
10652 Ptr = LD->getBasePtr();
10653 isSEXTLoad = LD->getExtensionType() == ISD::SEXTLOAD;
10654 } else if (StoreSDNode *ST = dyn_cast<StoreSDNode>(N)) {
10655 VT = ST->getMemoryVT();
10656 Ptr = ST->getBasePtr();
10661 bool isLegal = false;
10662 if (Subtarget->isThumb2())
10663 isLegal = getT2IndexedAddressParts(Op, VT, isSEXTLoad, Base, Offset,
10666 isLegal = getARMIndexedAddressParts(Op, VT, isSEXTLoad, Base, Offset,
10672 // Swap base ptr and offset to catch more post-index load / store when
10673 // it's legal. In Thumb2 mode, offset must be an immediate.
10674 if (Ptr == Offset && Op->getOpcode() == ISD::ADD &&
10675 !Subtarget->isThumb2())
10676 std::swap(Base, Offset);
10678 // Post-indexed load / store update the base pointer.
10683 AM = isInc ? ISD::POST_INC : ISD::POST_DEC;
10687 void ARMTargetLowering::computeKnownBitsForTargetNode(const SDValue Op,
10690 const SelectionDAG &DAG,
10691 unsigned Depth) const {
10692 unsigned BitWidth = KnownOne.getBitWidth();
10693 KnownZero = KnownOne = APInt(BitWidth, 0);
10694 switch (Op.getOpcode()) {
10700 // These nodes' second result is a boolean
10701 if (Op.getResNo() == 0)
10703 KnownZero |= APInt::getHighBitsSet(BitWidth, BitWidth - 1);
10705 case ARMISD::CMOV: {
10706 // Bits are known zero/one if known on the LHS and RHS.
10707 DAG.computeKnownBits(Op.getOperand(0), KnownZero, KnownOne, Depth+1);
10708 if (KnownZero == 0 && KnownOne == 0) return;
10710 APInt KnownZeroRHS, KnownOneRHS;
10711 DAG.computeKnownBits(Op.getOperand(1), KnownZeroRHS, KnownOneRHS, Depth+1);
10712 KnownZero &= KnownZeroRHS;
10713 KnownOne &= KnownOneRHS;
10716 case ISD::INTRINSIC_W_CHAIN: {
10717 ConstantSDNode *CN = cast<ConstantSDNode>(Op->getOperand(1));
10718 Intrinsic::ID IntID = static_cast<Intrinsic::ID>(CN->getZExtValue());
10721 case Intrinsic::arm_ldaex:
10722 case Intrinsic::arm_ldrex: {
10723 EVT VT = cast<MemIntrinsicSDNode>(Op)->getMemoryVT();
10724 unsigned MemBits = VT.getScalarType().getSizeInBits();
10725 KnownZero |= APInt::getHighBitsSet(BitWidth, BitWidth - MemBits);
10733 //===----------------------------------------------------------------------===//
10734 // ARM Inline Assembly Support
10735 //===----------------------------------------------------------------------===//
10737 bool ARMTargetLowering::ExpandInlineAsm(CallInst *CI) const {
10738 // Looking for "rev" which is V6+.
10739 if (!Subtarget->hasV6Ops())
10742 InlineAsm *IA = cast<InlineAsm>(CI->getCalledValue());
10743 std::string AsmStr = IA->getAsmString();
10744 SmallVector<StringRef, 4> AsmPieces;
10745 SplitString(AsmStr, AsmPieces, ";\n");
10747 switch (AsmPieces.size()) {
10748 default: return false;
10750 AsmStr = AsmPieces[0];
10752 SplitString(AsmStr, AsmPieces, " \t,");
10755 if (AsmPieces.size() == 3 &&
10756 AsmPieces[0] == "rev" && AsmPieces[1] == "$0" && AsmPieces[2] == "$1" &&
10757 IA->getConstraintString().compare(0, 4, "=l,l") == 0) {
10758 IntegerType *Ty = dyn_cast<IntegerType>(CI->getType());
10759 if (Ty && Ty->getBitWidth() == 32)
10760 return IntrinsicLowering::LowerToByteSwap(CI);
10768 /// getConstraintType - Given a constraint letter, return the type of
10769 /// constraint it is for this target.
10770 ARMTargetLowering::ConstraintType
10771 ARMTargetLowering::getConstraintType(StringRef Constraint) const {
10772 if (Constraint.size() == 1) {
10773 switch (Constraint[0]) {
10775 case 'l': return C_RegisterClass;
10776 case 'w': return C_RegisterClass;
10777 case 'h': return C_RegisterClass;
10778 case 'x': return C_RegisterClass;
10779 case 't': return C_RegisterClass;
10780 case 'j': return C_Other; // Constant for movw.
10781 // An address with a single base register. Due to the way we
10782 // currently handle addresses it is the same as an 'r' memory constraint.
10783 case 'Q': return C_Memory;
10785 } else if (Constraint.size() == 2) {
10786 switch (Constraint[0]) {
10788 // All 'U+' constraints are addresses.
10789 case 'U': return C_Memory;
10792 return TargetLowering::getConstraintType(Constraint);
10795 /// Examine constraint type and operand type and determine a weight value.
10796 /// This object must already have been set up with the operand type
10797 /// and the current alternative constraint selected.
10798 TargetLowering::ConstraintWeight
10799 ARMTargetLowering::getSingleConstraintMatchWeight(
10800 AsmOperandInfo &info, const char *constraint) const {
10801 ConstraintWeight weight = CW_Invalid;
10802 Value *CallOperandVal = info.CallOperandVal;
10803 // If we don't have a value, we can't do a match,
10804 // but allow it at the lowest weight.
10805 if (!CallOperandVal)
10807 Type *type = CallOperandVal->getType();
10808 // Look at the constraint type.
10809 switch (*constraint) {
10811 weight = TargetLowering::getSingleConstraintMatchWeight(info, constraint);
10814 if (type->isIntegerTy()) {
10815 if (Subtarget->isThumb())
10816 weight = CW_SpecificReg;
10818 weight = CW_Register;
10822 if (type->isFloatingPointTy())
10823 weight = CW_Register;
10829 typedef std::pair<unsigned, const TargetRegisterClass*> RCPair;
10830 RCPair ARMTargetLowering::getRegForInlineAsmConstraint(
10831 const TargetRegisterInfo *TRI, StringRef Constraint, MVT VT) const {
10832 if (Constraint.size() == 1) {
10833 // GCC ARM Constraint Letters
10834 switch (Constraint[0]) {
10835 case 'l': // Low regs or general regs.
10836 if (Subtarget->isThumb())
10837 return RCPair(0U, &ARM::tGPRRegClass);
10838 return RCPair(0U, &ARM::GPRRegClass);
10839 case 'h': // High regs or no regs.
10840 if (Subtarget->isThumb())
10841 return RCPair(0U, &ARM::hGPRRegClass);
10844 if (Subtarget->isThumb1Only())
10845 return RCPair(0U, &ARM::tGPRRegClass);
10846 return RCPair(0U, &ARM::GPRRegClass);
10848 if (VT == MVT::Other)
10850 if (VT == MVT::f32)
10851 return RCPair(0U, &ARM::SPRRegClass);
10852 if (VT.getSizeInBits() == 64)
10853 return RCPair(0U, &ARM::DPRRegClass);
10854 if (VT.getSizeInBits() == 128)
10855 return RCPair(0U, &ARM::QPRRegClass);
10858 if (VT == MVT::Other)
10860 if (VT == MVT::f32)
10861 return RCPair(0U, &ARM::SPR_8RegClass);
10862 if (VT.getSizeInBits() == 64)
10863 return RCPair(0U, &ARM::DPR_8RegClass);
10864 if (VT.getSizeInBits() == 128)
10865 return RCPair(0U, &ARM::QPR_8RegClass);
10868 if (VT == MVT::f32)
10869 return RCPair(0U, &ARM::SPRRegClass);
10873 if (StringRef("{cc}").equals_lower(Constraint))
10874 return std::make_pair(unsigned(ARM::CPSR), &ARM::CCRRegClass);
10876 return TargetLowering::getRegForInlineAsmConstraint(TRI, Constraint, VT);
10879 /// LowerAsmOperandForConstraint - Lower the specified operand into the Ops
10880 /// vector. If it is invalid, don't add anything to Ops.
10881 void ARMTargetLowering::LowerAsmOperandForConstraint(SDValue Op,
10882 std::string &Constraint,
10883 std::vector<SDValue>&Ops,
10884 SelectionDAG &DAG) const {
10887 // Currently only support length 1 constraints.
10888 if (Constraint.length() != 1) return;
10890 char ConstraintLetter = Constraint[0];
10891 switch (ConstraintLetter) {
10894 case 'I': case 'J': case 'K': case 'L':
10895 case 'M': case 'N': case 'O':
10896 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op);
10900 int64_t CVal64 = C->getSExtValue();
10901 int CVal = (int) CVal64;
10902 // None of these constraints allow values larger than 32 bits. Check
10903 // that the value fits in an int.
10904 if (CVal != CVal64)
10907 switch (ConstraintLetter) {
10909 // Constant suitable for movw, must be between 0 and
10911 if (Subtarget->hasV6T2Ops())
10912 if (CVal >= 0 && CVal <= 65535)
10916 if (Subtarget->isThumb1Only()) {
10917 // This must be a constant between 0 and 255, for ADD
10919 if (CVal >= 0 && CVal <= 255)
10921 } else if (Subtarget->isThumb2()) {
10922 // A constant that can be used as an immediate value in a
10923 // data-processing instruction.
10924 if (ARM_AM::getT2SOImmVal(CVal) != -1)
10927 // A constant that can be used as an immediate value in a
10928 // data-processing instruction.
10929 if (ARM_AM::getSOImmVal(CVal) != -1)
10935 if (Subtarget->isThumb()) { // FIXME thumb2
10936 // This must be a constant between -255 and -1, for negated ADD
10937 // immediates. This can be used in GCC with an "n" modifier that
10938 // prints the negated value, for use with SUB instructions. It is
10939 // not useful otherwise but is implemented for compatibility.
10940 if (CVal >= -255 && CVal <= -1)
10943 // This must be a constant between -4095 and 4095. It is not clear
10944 // what this constraint is intended for. Implemented for
10945 // compatibility with GCC.
10946 if (CVal >= -4095 && CVal <= 4095)
10952 if (Subtarget->isThumb1Only()) {
10953 // A 32-bit value where only one byte has a nonzero value. Exclude
10954 // zero to match GCC. This constraint is used by GCC internally for
10955 // constants that can be loaded with a move/shift combination.
10956 // It is not useful otherwise but is implemented for compatibility.
10957 if (CVal != 0 && ARM_AM::isThumbImmShiftedVal(CVal))
10959 } else if (Subtarget->isThumb2()) {
10960 // A constant whose bitwise inverse can be used as an immediate
10961 // value in a data-processing instruction. This can be used in GCC
10962 // with a "B" modifier that prints the inverted value, for use with
10963 // BIC and MVN instructions. It is not useful otherwise but is
10964 // implemented for compatibility.
10965 if (ARM_AM::getT2SOImmVal(~CVal) != -1)
10968 // A constant whose bitwise inverse can be used as an immediate
10969 // value in a data-processing instruction. This can be used in GCC
10970 // with a "B" modifier that prints the inverted value, for use with
10971 // BIC and MVN instructions. It is not useful otherwise but is
10972 // implemented for compatibility.
10973 if (ARM_AM::getSOImmVal(~CVal) != -1)
10979 if (Subtarget->isThumb1Only()) {
10980 // This must be a constant between -7 and 7,
10981 // for 3-operand ADD/SUB immediate instructions.
10982 if (CVal >= -7 && CVal < 7)
10984 } else if (Subtarget->isThumb2()) {
10985 // A constant whose negation can be used as an immediate value in a
10986 // data-processing instruction. This can be used in GCC with an "n"
10987 // modifier that prints the negated value, for use with SUB
10988 // instructions. It is not useful otherwise but is implemented for
10990 if (ARM_AM::getT2SOImmVal(-CVal) != -1)
10993 // A constant whose negation can be used as an immediate value in a
10994 // data-processing instruction. This can be used in GCC with an "n"
10995 // modifier that prints the negated value, for use with SUB
10996 // instructions. It is not useful otherwise but is implemented for
10998 if (ARM_AM::getSOImmVal(-CVal) != -1)
11004 if (Subtarget->isThumb()) { // FIXME thumb2
11005 // This must be a multiple of 4 between 0 and 1020, for
11006 // ADD sp + immediate.
11007 if ((CVal >= 0 && CVal <= 1020) && ((CVal & 3) == 0))
11010 // A power of two or a constant between 0 and 32. This is used in
11011 // GCC for the shift amount on shifted register operands, but it is
11012 // useful in general for any shift amounts.
11013 if ((CVal >= 0 && CVal <= 32) || ((CVal & (CVal - 1)) == 0))
11019 if (Subtarget->isThumb()) { // FIXME thumb2
11020 // This must be a constant between 0 and 31, for shift amounts.
11021 if (CVal >= 0 && CVal <= 31)
11027 if (Subtarget->isThumb()) { // FIXME thumb2
11028 // This must be a multiple of 4 between -508 and 508, for
11029 // ADD/SUB sp = sp + immediate.
11030 if ((CVal >= -508 && CVal <= 508) && ((CVal & 3) == 0))
11035 Result = DAG.getTargetConstant(CVal, SDLoc(Op), Op.getValueType());
11039 if (Result.getNode()) {
11040 Ops.push_back(Result);
11043 return TargetLowering::LowerAsmOperandForConstraint(Op, Constraint, Ops, DAG);
11046 SDValue ARMTargetLowering::LowerDivRem(SDValue Op, SelectionDAG &DAG) const {
11047 assert(Subtarget->isTargetAEABI() && "Register-based DivRem lowering only");
11048 unsigned Opcode = Op->getOpcode();
11049 assert((Opcode == ISD::SDIVREM || Opcode == ISD::UDIVREM) &&
11050 "Invalid opcode for Div/Rem lowering");
11051 bool isSigned = (Opcode == ISD::SDIVREM);
11052 EVT VT = Op->getValueType(0);
11053 Type *Ty = VT.getTypeForEVT(*DAG.getContext());
11056 switch (VT.getSimpleVT().SimpleTy) {
11057 default: llvm_unreachable("Unexpected request for libcall!");
11058 case MVT::i8: LC = isSigned ? RTLIB::SDIVREM_I8 : RTLIB::UDIVREM_I8; break;
11059 case MVT::i16: LC = isSigned ? RTLIB::SDIVREM_I16 : RTLIB::UDIVREM_I16; break;
11060 case MVT::i32: LC = isSigned ? RTLIB::SDIVREM_I32 : RTLIB::UDIVREM_I32; break;
11061 case MVT::i64: LC = isSigned ? RTLIB::SDIVREM_I64 : RTLIB::UDIVREM_I64; break;
11064 SDValue InChain = DAG.getEntryNode();
11066 TargetLowering::ArgListTy Args;
11067 TargetLowering::ArgListEntry Entry;
11068 for (unsigned i = 0, e = Op->getNumOperands(); i != e; ++i) {
11069 EVT ArgVT = Op->getOperand(i).getValueType();
11070 Type *ArgTy = ArgVT.getTypeForEVT(*DAG.getContext());
11071 Entry.Node = Op->getOperand(i);
11073 Entry.isSExt = isSigned;
11074 Entry.isZExt = !isSigned;
11075 Args.push_back(Entry);
11078 SDValue Callee = DAG.getExternalSymbol(getLibcallName(LC),
11079 getPointerTy(DAG.getDataLayout()));
11081 Type *RetTy = (Type*)StructType::get(Ty, Ty, nullptr);
11084 TargetLowering::CallLoweringInfo CLI(DAG);
11085 CLI.setDebugLoc(dl).setChain(InChain)
11086 .setCallee(getLibcallCallingConv(LC), RetTy, Callee, std::move(Args), 0)
11087 .setInRegister().setSExtResult(isSigned).setZExtResult(!isSigned);
11089 std::pair<SDValue, SDValue> CallInfo = LowerCallTo(CLI);
11090 return CallInfo.first;
11094 ARMTargetLowering::LowerDYNAMIC_STACKALLOC(SDValue Op, SelectionDAG &DAG) const {
11095 assert(Subtarget->isTargetWindows() && "unsupported target platform");
11099 SDValue Chain = Op.getOperand(0);
11100 SDValue Size = Op.getOperand(1);
11102 SDValue Words = DAG.getNode(ISD::SRL, DL, MVT::i32, Size,
11103 DAG.getConstant(2, DL, MVT::i32));
11106 Chain = DAG.getCopyToReg(Chain, DL, ARM::R4, Words, Flag);
11107 Flag = Chain.getValue(1);
11109 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
11110 Chain = DAG.getNode(ARMISD::WIN__CHKSTK, DL, NodeTys, Chain, Flag);
11112 SDValue NewSP = DAG.getCopyFromReg(Chain, DL, ARM::SP, MVT::i32);
11113 Chain = NewSP.getValue(1);
11115 SDValue Ops[2] = { NewSP, Chain };
11116 return DAG.getMergeValues(Ops, DL);
11119 SDValue ARMTargetLowering::LowerFP_EXTEND(SDValue Op, SelectionDAG &DAG) const {
11120 assert(Op.getValueType() == MVT::f64 && Subtarget->isFPOnlySP() &&
11121 "Unexpected type for custom-lowering FP_EXTEND");
11124 LC = RTLIB::getFPEXT(Op.getOperand(0).getValueType(), Op.getValueType());
11126 SDValue SrcVal = Op.getOperand(0);
11127 return makeLibCall(DAG, LC, Op.getValueType(), &SrcVal, 1,
11128 /*isSigned*/ false, SDLoc(Op)).first;
11131 SDValue ARMTargetLowering::LowerFP_ROUND(SDValue Op, SelectionDAG &DAG) const {
11132 assert(Op.getOperand(0).getValueType() == MVT::f64 &&
11133 Subtarget->isFPOnlySP() &&
11134 "Unexpected type for custom-lowering FP_ROUND");
11137 LC = RTLIB::getFPROUND(Op.getOperand(0).getValueType(), Op.getValueType());
11139 SDValue SrcVal = Op.getOperand(0);
11140 return makeLibCall(DAG, LC, Op.getValueType(), &SrcVal, 1,
11141 /*isSigned*/ false, SDLoc(Op)).first;
11145 ARMTargetLowering::isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const {
11146 // The ARM target isn't yet aware of offsets.
11150 bool ARM::isBitFieldInvertedMask(unsigned v) {
11151 if (v == 0xffffffff)
11154 // there can be 1's on either or both "outsides", all the "inside"
11155 // bits must be 0's
11156 return isShiftedMask_32(~v);
11159 /// isFPImmLegal - Returns true if the target can instruction select the
11160 /// specified FP immediate natively. If false, the legalizer will
11161 /// materialize the FP immediate as a load from a constant pool.
11162 bool ARMTargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT) const {
11163 if (!Subtarget->hasVFP3())
11165 if (VT == MVT::f32)
11166 return ARM_AM::getFP32Imm(Imm) != -1;
11167 if (VT == MVT::f64 && !Subtarget->isFPOnlySP())
11168 return ARM_AM::getFP64Imm(Imm) != -1;
11172 /// getTgtMemIntrinsic - Represent NEON load and store intrinsics as
11173 /// MemIntrinsicNodes. The associated MachineMemOperands record the alignment
11174 /// specified in the intrinsic calls.
11175 bool ARMTargetLowering::getTgtMemIntrinsic(IntrinsicInfo &Info,
11177 unsigned Intrinsic) const {
11178 switch (Intrinsic) {
11179 case Intrinsic::arm_neon_vld1:
11180 case Intrinsic::arm_neon_vld2:
11181 case Intrinsic::arm_neon_vld3:
11182 case Intrinsic::arm_neon_vld4:
11183 case Intrinsic::arm_neon_vld2lane:
11184 case Intrinsic::arm_neon_vld3lane:
11185 case Intrinsic::arm_neon_vld4lane: {
11186 Info.opc = ISD::INTRINSIC_W_CHAIN;
11187 // Conservatively set memVT to the entire set of vectors loaded.
11188 auto &DL = I.getCalledFunction()->getParent()->getDataLayout();
11189 uint64_t NumElts = DL.getTypeAllocSize(I.getType()) / 8;
11190 Info.memVT = EVT::getVectorVT(I.getType()->getContext(), MVT::i64, NumElts);
11191 Info.ptrVal = I.getArgOperand(0);
11193 Value *AlignArg = I.getArgOperand(I.getNumArgOperands() - 1);
11194 Info.align = cast<ConstantInt>(AlignArg)->getZExtValue();
11195 Info.vol = false; // volatile loads with NEON intrinsics not supported
11196 Info.readMem = true;
11197 Info.writeMem = false;
11200 case Intrinsic::arm_neon_vst1:
11201 case Intrinsic::arm_neon_vst2:
11202 case Intrinsic::arm_neon_vst3:
11203 case Intrinsic::arm_neon_vst4:
11204 case Intrinsic::arm_neon_vst2lane:
11205 case Intrinsic::arm_neon_vst3lane:
11206 case Intrinsic::arm_neon_vst4lane: {
11207 Info.opc = ISD::INTRINSIC_VOID;
11208 // Conservatively set memVT to the entire set of vectors stored.
11209 auto &DL = I.getCalledFunction()->getParent()->getDataLayout();
11210 unsigned NumElts = 0;
11211 for (unsigned ArgI = 1, ArgE = I.getNumArgOperands(); ArgI < ArgE; ++ArgI) {
11212 Type *ArgTy = I.getArgOperand(ArgI)->getType();
11213 if (!ArgTy->isVectorTy())
11215 NumElts += DL.getTypeAllocSize(ArgTy) / 8;
11217 Info.memVT = EVT::getVectorVT(I.getType()->getContext(), MVT::i64, NumElts);
11218 Info.ptrVal = I.getArgOperand(0);
11220 Value *AlignArg = I.getArgOperand(I.getNumArgOperands() - 1);
11221 Info.align = cast<ConstantInt>(AlignArg)->getZExtValue();
11222 Info.vol = false; // volatile stores with NEON intrinsics not supported
11223 Info.readMem = false;
11224 Info.writeMem = true;
11227 case Intrinsic::arm_ldaex:
11228 case Intrinsic::arm_ldrex: {
11229 auto &DL = I.getCalledFunction()->getParent()->getDataLayout();
11230 PointerType *PtrTy = cast<PointerType>(I.getArgOperand(0)->getType());
11231 Info.opc = ISD::INTRINSIC_W_CHAIN;
11232 Info.memVT = MVT::getVT(PtrTy->getElementType());
11233 Info.ptrVal = I.getArgOperand(0);
11235 Info.align = DL.getABITypeAlignment(PtrTy->getElementType());
11237 Info.readMem = true;
11238 Info.writeMem = false;
11241 case Intrinsic::arm_stlex:
11242 case Intrinsic::arm_strex: {
11243 auto &DL = I.getCalledFunction()->getParent()->getDataLayout();
11244 PointerType *PtrTy = cast<PointerType>(I.getArgOperand(1)->getType());
11245 Info.opc = ISD::INTRINSIC_W_CHAIN;
11246 Info.memVT = MVT::getVT(PtrTy->getElementType());
11247 Info.ptrVal = I.getArgOperand(1);
11249 Info.align = DL.getABITypeAlignment(PtrTy->getElementType());
11251 Info.readMem = false;
11252 Info.writeMem = true;
11255 case Intrinsic::arm_stlexd:
11256 case Intrinsic::arm_strexd: {
11257 Info.opc = ISD::INTRINSIC_W_CHAIN;
11258 Info.memVT = MVT::i64;
11259 Info.ptrVal = I.getArgOperand(2);
11263 Info.readMem = false;
11264 Info.writeMem = true;
11267 case Intrinsic::arm_ldaexd:
11268 case Intrinsic::arm_ldrexd: {
11269 Info.opc = ISD::INTRINSIC_W_CHAIN;
11270 Info.memVT = MVT::i64;
11271 Info.ptrVal = I.getArgOperand(0);
11275 Info.readMem = true;
11276 Info.writeMem = false;
11286 /// \brief Returns true if it is beneficial to convert a load of a constant
11287 /// to just the constant itself.
11288 bool ARMTargetLowering::shouldConvertConstantLoadToIntImm(const APInt &Imm,
11290 assert(Ty->isIntegerTy());
11292 unsigned Bits = Ty->getPrimitiveSizeInBits();
11293 if (Bits == 0 || Bits > 32)
11298 bool ARMTargetLowering::hasLoadLinkedStoreConditional() const { return true; }
11300 Instruction* ARMTargetLowering::makeDMB(IRBuilder<> &Builder,
11301 ARM_MB::MemBOpt Domain) const {
11302 Module *M = Builder.GetInsertBlock()->getParent()->getParent();
11304 // First, if the target has no DMB, see what fallback we can use.
11305 if (!Subtarget->hasDataBarrier()) {
11306 // Some ARMv6 cpus can support data barriers with an mcr instruction.
11307 // Thumb1 and pre-v6 ARM mode use a libcall instead and should never get
11309 if (Subtarget->hasV6Ops() && !Subtarget->isThumb()) {
11310 Function *MCR = llvm::Intrinsic::getDeclaration(M, Intrinsic::arm_mcr);
11311 Value* args[6] = {Builder.getInt32(15), Builder.getInt32(0),
11312 Builder.getInt32(0), Builder.getInt32(7),
11313 Builder.getInt32(10), Builder.getInt32(5)};
11314 return Builder.CreateCall(MCR, args);
11316 // Instead of using barriers, atomic accesses on these subtargets use
11318 llvm_unreachable("makeDMB on a target so old that it has no barriers");
11321 Function *DMB = llvm::Intrinsic::getDeclaration(M, Intrinsic::arm_dmb);
11322 // Only a full system barrier exists in the M-class architectures.
11323 Domain = Subtarget->isMClass() ? ARM_MB::SY : Domain;
11324 Constant *CDomain = Builder.getInt32(Domain);
11325 return Builder.CreateCall(DMB, CDomain);
11329 // Based on http://www.cl.cam.ac.uk/~pes20/cpp/cpp0xmappings.html
11330 Instruction* ARMTargetLowering::emitLeadingFence(IRBuilder<> &Builder,
11331 AtomicOrdering Ord, bool IsStore,
11332 bool IsLoad) const {
11333 if (!getInsertFencesForAtomic())
11339 llvm_unreachable("Invalid fence: unordered/non-atomic");
11342 return nullptr; // Nothing to do
11343 case SequentiallyConsistent:
11345 return nullptr; // Nothing to do
11348 case AcquireRelease:
11349 if (Subtarget->isSwift())
11350 return makeDMB(Builder, ARM_MB::ISHST);
11351 // FIXME: add a comment with a link to documentation justifying this.
11353 return makeDMB(Builder, ARM_MB::ISH);
11355 llvm_unreachable("Unknown fence ordering in emitLeadingFence");
11358 Instruction* ARMTargetLowering::emitTrailingFence(IRBuilder<> &Builder,
11359 AtomicOrdering Ord, bool IsStore,
11360 bool IsLoad) const {
11361 if (!getInsertFencesForAtomic())
11367 llvm_unreachable("Invalid fence: unordered/not-atomic");
11370 return nullptr; // Nothing to do
11372 case AcquireRelease:
11373 case SequentiallyConsistent:
11374 return makeDMB(Builder, ARM_MB::ISH);
11376 llvm_unreachable("Unknown fence ordering in emitTrailingFence");
11379 // Loads and stores less than 64-bits are already atomic; ones above that
11380 // are doomed anyway, so defer to the default libcall and blame the OS when
11381 // things go wrong. Cortex M doesn't have ldrexd/strexd though, so don't emit
11382 // anything for those.
11383 bool ARMTargetLowering::shouldExpandAtomicStoreInIR(StoreInst *SI) const {
11384 unsigned Size = SI->getValueOperand()->getType()->getPrimitiveSizeInBits();
11385 return (Size == 64) && !Subtarget->isMClass();
11388 // Loads and stores less than 64-bits are already atomic; ones above that
11389 // are doomed anyway, so defer to the default libcall and blame the OS when
11390 // things go wrong. Cortex M doesn't have ldrexd/strexd though, so don't emit
11391 // anything for those.
11392 // FIXME: ldrd and strd are atomic if the CPU has LPAE (e.g. A15 has that
11393 // guarantee, see DDI0406C ARM architecture reference manual,
11394 // sections A8.8.72-74 LDRD)
11395 bool ARMTargetLowering::shouldExpandAtomicLoadInIR(LoadInst *LI) const {
11396 unsigned Size = LI->getType()->getPrimitiveSizeInBits();
11397 return (Size == 64) && !Subtarget->isMClass();
11400 // For the real atomic operations, we have ldrex/strex up to 32 bits,
11401 // and up to 64 bits on the non-M profiles
11402 TargetLoweringBase::AtomicRMWExpansionKind
11403 ARMTargetLowering::shouldExpandAtomicRMWInIR(AtomicRMWInst *AI) const {
11404 unsigned Size = AI->getType()->getPrimitiveSizeInBits();
11405 return (Size <= (Subtarget->isMClass() ? 32U : 64U))
11406 ? AtomicRMWExpansionKind::LLSC
11407 : AtomicRMWExpansionKind::None;
11410 // This has so far only been implemented for MachO.
11411 bool ARMTargetLowering::useLoadStackGuardNode() const {
11412 return Subtarget->isTargetMachO();
11415 bool ARMTargetLowering::canCombineStoreAndExtract(Type *VectorTy, Value *Idx,
11416 unsigned &Cost) const {
11417 // If we do not have NEON, vector types are not natively supported.
11418 if (!Subtarget->hasNEON())
11421 // Floating point values and vector values map to the same register file.
11422 // Therefore, althought we could do a store extract of a vector type, this is
11423 // better to leave at float as we have more freedom in the addressing mode for
11425 if (VectorTy->isFPOrFPVectorTy())
11428 // If the index is unknown at compile time, this is very expensive to lower
11429 // and it is not possible to combine the store with the extract.
11430 if (!isa<ConstantInt>(Idx))
11433 assert(VectorTy->isVectorTy() && "VectorTy is not a vector type");
11434 unsigned BitWidth = cast<VectorType>(VectorTy)->getBitWidth();
11435 // We can do a store + vector extract on any vector that fits perfectly in a D
11437 if (BitWidth == 64 || BitWidth == 128) {
11444 Value *ARMTargetLowering::emitLoadLinked(IRBuilder<> &Builder, Value *Addr,
11445 AtomicOrdering Ord) const {
11446 Module *M = Builder.GetInsertBlock()->getParent()->getParent();
11447 Type *ValTy = cast<PointerType>(Addr->getType())->getElementType();
11448 bool IsAcquire = isAtLeastAcquire(Ord);
11450 // Since i64 isn't legal and intrinsics don't get type-lowered, the ldrexd
11451 // intrinsic must return {i32, i32} and we have to recombine them into a
11452 // single i64 here.
11453 if (ValTy->getPrimitiveSizeInBits() == 64) {
11454 Intrinsic::ID Int =
11455 IsAcquire ? Intrinsic::arm_ldaexd : Intrinsic::arm_ldrexd;
11456 Function *Ldrex = llvm::Intrinsic::getDeclaration(M, Int);
11458 Addr = Builder.CreateBitCast(Addr, Type::getInt8PtrTy(M->getContext()));
11459 Value *LoHi = Builder.CreateCall(Ldrex, Addr, "lohi");
11461 Value *Lo = Builder.CreateExtractValue(LoHi, 0, "lo");
11462 Value *Hi = Builder.CreateExtractValue(LoHi, 1, "hi");
11463 if (!Subtarget->isLittle())
11464 std::swap (Lo, Hi);
11465 Lo = Builder.CreateZExt(Lo, ValTy, "lo64");
11466 Hi = Builder.CreateZExt(Hi, ValTy, "hi64");
11467 return Builder.CreateOr(
11468 Lo, Builder.CreateShl(Hi, ConstantInt::get(ValTy, 32)), "val64");
11471 Type *Tys[] = { Addr->getType() };
11472 Intrinsic::ID Int = IsAcquire ? Intrinsic::arm_ldaex : Intrinsic::arm_ldrex;
11473 Function *Ldrex = llvm::Intrinsic::getDeclaration(M, Int, Tys);
11475 return Builder.CreateTruncOrBitCast(
11476 Builder.CreateCall(Ldrex, Addr),
11477 cast<PointerType>(Addr->getType())->getElementType());
11480 Value *ARMTargetLowering::emitStoreConditional(IRBuilder<> &Builder, Value *Val,
11482 AtomicOrdering Ord) const {
11483 Module *M = Builder.GetInsertBlock()->getParent()->getParent();
11484 bool IsRelease = isAtLeastRelease(Ord);
11486 // Since the intrinsics must have legal type, the i64 intrinsics take two
11487 // parameters: "i32, i32". We must marshal Val into the appropriate form
11488 // before the call.
11489 if (Val->getType()->getPrimitiveSizeInBits() == 64) {
11490 Intrinsic::ID Int =
11491 IsRelease ? Intrinsic::arm_stlexd : Intrinsic::arm_strexd;
11492 Function *Strex = Intrinsic::getDeclaration(M, Int);
11493 Type *Int32Ty = Type::getInt32Ty(M->getContext());
11495 Value *Lo = Builder.CreateTrunc(Val, Int32Ty, "lo");
11496 Value *Hi = Builder.CreateTrunc(Builder.CreateLShr(Val, 32), Int32Ty, "hi");
11497 if (!Subtarget->isLittle())
11498 std::swap (Lo, Hi);
11499 Addr = Builder.CreateBitCast(Addr, Type::getInt8PtrTy(M->getContext()));
11500 return Builder.CreateCall(Strex, {Lo, Hi, Addr});
11503 Intrinsic::ID Int = IsRelease ? Intrinsic::arm_stlex : Intrinsic::arm_strex;
11504 Type *Tys[] = { Addr->getType() };
11505 Function *Strex = Intrinsic::getDeclaration(M, Int, Tys);
11507 return Builder.CreateCall(
11508 Strex, {Builder.CreateZExtOrBitCast(
11509 Val, Strex->getFunctionType()->getParamType(0)),
11513 /// \brief Lower an interleaved load into a vldN intrinsic.
11515 /// E.g. Lower an interleaved load (Factor = 2):
11516 /// %wide.vec = load <8 x i32>, <8 x i32>* %ptr, align 4
11517 /// %v0 = shuffle %wide.vec, undef, <0, 2, 4, 6> ; Extract even elements
11518 /// %v1 = shuffle %wide.vec, undef, <1, 3, 5, 7> ; Extract odd elements
11521 /// %vld2 = { <4 x i32>, <4 x i32> } call llvm.arm.neon.vld2(%ptr, 4)
11522 /// %vec0 = extractelement { <4 x i32>, <4 x i32> } %vld2, i32 0
11523 /// %vec1 = extractelement { <4 x i32>, <4 x i32> } %vld2, i32 1
11524 bool ARMTargetLowering::lowerInterleavedLoad(
11525 LoadInst *LI, ArrayRef<ShuffleVectorInst *> Shuffles,
11526 ArrayRef<unsigned> Indices, unsigned Factor) const {
11527 assert(Factor >= 2 && Factor <= getMaxSupportedInterleaveFactor() &&
11528 "Invalid interleave factor");
11529 assert(!Shuffles.empty() && "Empty shufflevector input");
11530 assert(Shuffles.size() == Indices.size() &&
11531 "Unmatched number of shufflevectors and indices");
11533 VectorType *VecTy = Shuffles[0]->getType();
11534 Type *EltTy = VecTy->getVectorElementType();
11536 const DataLayout &DL = LI->getModule()->getDataLayout();
11537 unsigned VecSize = DL.getTypeAllocSizeInBits(VecTy);
11538 bool EltIs64Bits = DL.getTypeAllocSizeInBits(EltTy) == 64;
11540 // Skip illegal vector types and vector types of i64/f64 element (vldN doesn't
11541 // support i64/f64 element).
11542 if ((VecSize != 64 && VecSize != 128) || EltIs64Bits)
11545 // A pointer vector can not be the return type of the ldN intrinsics. Need to
11546 // load integer vectors first and then convert to pointer vectors.
11547 if (EltTy->isPointerTy())
11549 VectorType::get(DL.getIntPtrType(EltTy), VecTy->getVectorNumElements());
11551 static const Intrinsic::ID LoadInts[3] = {Intrinsic::arm_neon_vld2,
11552 Intrinsic::arm_neon_vld3,
11553 Intrinsic::arm_neon_vld4};
11555 Function *VldnFunc =
11556 Intrinsic::getDeclaration(LI->getModule(), LoadInts[Factor - 2], VecTy);
11558 IRBuilder<> Builder(LI);
11559 SmallVector<Value *, 2> Ops;
11561 Type *Int8Ptr = Builder.getInt8PtrTy(LI->getPointerAddressSpace());
11562 Ops.push_back(Builder.CreateBitCast(LI->getPointerOperand(), Int8Ptr));
11563 Ops.push_back(Builder.getInt32(LI->getAlignment()));
11565 CallInst *VldN = Builder.CreateCall(VldnFunc, Ops, "vldN");
11567 // Replace uses of each shufflevector with the corresponding vector loaded
11569 for (unsigned i = 0; i < Shuffles.size(); i++) {
11570 ShuffleVectorInst *SV = Shuffles[i];
11571 unsigned Index = Indices[i];
11573 Value *SubVec = Builder.CreateExtractValue(VldN, Index);
11575 // Convert the integer vector to pointer vector if the element is pointer.
11576 if (EltTy->isPointerTy())
11577 SubVec = Builder.CreateIntToPtr(SubVec, SV->getType());
11579 SV->replaceAllUsesWith(SubVec);
11585 /// \brief Get a mask consisting of sequential integers starting from \p Start.
11587 /// I.e. <Start, Start + 1, ..., Start + NumElts - 1>
11588 static Constant *getSequentialMask(IRBuilder<> &Builder, unsigned Start,
11589 unsigned NumElts) {
11590 SmallVector<Constant *, 16> Mask;
11591 for (unsigned i = 0; i < NumElts; i++)
11592 Mask.push_back(Builder.getInt32(Start + i));
11594 return ConstantVector::get(Mask);
11597 /// \brief Lower an interleaved store into a vstN intrinsic.
11599 /// E.g. Lower an interleaved store (Factor = 3):
11600 /// %i.vec = shuffle <8 x i32> %v0, <8 x i32> %v1,
11601 /// <0, 4, 8, 1, 5, 9, 2, 6, 10, 3, 7, 11>
11602 /// store <12 x i32> %i.vec, <12 x i32>* %ptr, align 4
11605 /// %sub.v0 = shuffle <8 x i32> %v0, <8 x i32> v1, <0, 1, 2, 3>
11606 /// %sub.v1 = shuffle <8 x i32> %v0, <8 x i32> v1, <4, 5, 6, 7>
11607 /// %sub.v2 = shuffle <8 x i32> %v0, <8 x i32> v1, <8, 9, 10, 11>
11608 /// call void llvm.arm.neon.vst3(%ptr, %sub.v0, %sub.v1, %sub.v2, 4)
11610 /// Note that the new shufflevectors will be removed and we'll only generate one
11611 /// vst3 instruction in CodeGen.
11612 bool ARMTargetLowering::lowerInterleavedStore(StoreInst *SI,
11613 ShuffleVectorInst *SVI,
11614 unsigned Factor) const {
11615 assert(Factor >= 2 && Factor <= getMaxSupportedInterleaveFactor() &&
11616 "Invalid interleave factor");
11618 VectorType *VecTy = SVI->getType();
11619 assert(VecTy->getVectorNumElements() % Factor == 0 &&
11620 "Invalid interleaved store");
11622 unsigned NumSubElts = VecTy->getVectorNumElements() / Factor;
11623 Type *EltTy = VecTy->getVectorElementType();
11624 VectorType *SubVecTy = VectorType::get(EltTy, NumSubElts);
11626 const DataLayout &DL = SI->getModule()->getDataLayout();
11627 unsigned SubVecSize = DL.getTypeAllocSizeInBits(SubVecTy);
11628 bool EltIs64Bits = DL.getTypeAllocSizeInBits(EltTy) == 64;
11630 // Skip illegal sub vector types and vector types of i64/f64 element (vstN
11631 // doesn't support i64/f64 element).
11632 if ((SubVecSize != 64 && SubVecSize != 128) || EltIs64Bits)
11635 Value *Op0 = SVI->getOperand(0);
11636 Value *Op1 = SVI->getOperand(1);
11637 IRBuilder<> Builder(SI);
11639 // StN intrinsics don't support pointer vectors as arguments. Convert pointer
11640 // vectors to integer vectors.
11641 if (EltTy->isPointerTy()) {
11642 Type *IntTy = DL.getIntPtrType(EltTy);
11644 // Convert to the corresponding integer vector.
11646 VectorType::get(IntTy, Op0->getType()->getVectorNumElements());
11647 Op0 = Builder.CreatePtrToInt(Op0, IntVecTy);
11648 Op1 = Builder.CreatePtrToInt(Op1, IntVecTy);
11650 SubVecTy = VectorType::get(IntTy, NumSubElts);
11653 static Intrinsic::ID StoreInts[3] = {Intrinsic::arm_neon_vst2,
11654 Intrinsic::arm_neon_vst3,
11655 Intrinsic::arm_neon_vst4};
11656 Function *VstNFunc = Intrinsic::getDeclaration(
11657 SI->getModule(), StoreInts[Factor - 2], SubVecTy);
11659 SmallVector<Value *, 6> Ops;
11661 Type *Int8Ptr = Builder.getInt8PtrTy(SI->getPointerAddressSpace());
11662 Ops.push_back(Builder.CreateBitCast(SI->getPointerOperand(), Int8Ptr));
11664 // Split the shufflevector operands into sub vectors for the new vstN call.
11665 for (unsigned i = 0; i < Factor; i++)
11666 Ops.push_back(Builder.CreateShuffleVector(
11667 Op0, Op1, getSequentialMask(Builder, NumSubElts * i, NumSubElts)));
11669 Ops.push_back(Builder.getInt32(SI->getAlignment()));
11670 Builder.CreateCall(VstNFunc, Ops);
11682 static bool isHomogeneousAggregate(Type *Ty, HABaseType &Base,
11683 uint64_t &Members) {
11684 if (const StructType *ST = dyn_cast<StructType>(Ty)) {
11685 for (unsigned i = 0; i < ST->getNumElements(); ++i) {
11686 uint64_t SubMembers = 0;
11687 if (!isHomogeneousAggregate(ST->getElementType(i), Base, SubMembers))
11689 Members += SubMembers;
11691 } else if (const ArrayType *AT = dyn_cast<ArrayType>(Ty)) {
11692 uint64_t SubMembers = 0;
11693 if (!isHomogeneousAggregate(AT->getElementType(), Base, SubMembers))
11695 Members += SubMembers * AT->getNumElements();
11696 } else if (Ty->isFloatTy()) {
11697 if (Base != HA_UNKNOWN && Base != HA_FLOAT)
11701 } else if (Ty->isDoubleTy()) {
11702 if (Base != HA_UNKNOWN && Base != HA_DOUBLE)
11706 } else if (const VectorType *VT = dyn_cast<VectorType>(Ty)) {
11713 return VT->getBitWidth() == 64;
11715 return VT->getBitWidth() == 128;
11717 switch (VT->getBitWidth()) {
11730 return (Members > 0 && Members <= 4);
11733 /// \brief Return true if a type is an AAPCS-VFP homogeneous aggregate or one of
11734 /// [N x i32] or [N x i64]. This allows front-ends to skip emitting padding when
11735 /// passing according to AAPCS rules.
11736 bool ARMTargetLowering::functionArgumentNeedsConsecutiveRegisters(
11737 Type *Ty, CallingConv::ID CallConv, bool isVarArg) const {
11738 if (getEffectiveCallingConv(CallConv, isVarArg) !=
11739 CallingConv::ARM_AAPCS_VFP)
11742 HABaseType Base = HA_UNKNOWN;
11743 uint64_t Members = 0;
11744 bool IsHA = isHomogeneousAggregate(Ty, Base, Members);
11745 DEBUG(dbgs() << "isHA: " << IsHA << " "; Ty->dump());
11747 bool IsIntArray = Ty->isArrayTy() && Ty->getArrayElementType()->isIntegerTy();
11748 return IsHA || IsIntArray;