1 //===-- PPCISelLowering.cpp - PPC 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 implements the PPCISelLowering class.
12 //===----------------------------------------------------------------------===//
14 #include "PPCISelLowering.h"
15 #include "MCTargetDesc/PPCPredicates.h"
16 #include "PPCCallingConv.h"
17 #include "PPCMachineFunctionInfo.h"
18 #include "PPCPerfectShuffle.h"
19 #include "PPCTargetMachine.h"
20 #include "PPCTargetObjectFile.h"
21 #include "llvm/ADT/STLExtras.h"
22 #include "llvm/ADT/StringSwitch.h"
23 #include "llvm/ADT/Triple.h"
24 #include "llvm/CodeGen/CallingConvLower.h"
25 #include "llvm/CodeGen/MachineFrameInfo.h"
26 #include "llvm/CodeGen/MachineFunction.h"
27 #include "llvm/CodeGen/MachineInstrBuilder.h"
28 #include "llvm/CodeGen/MachineLoopInfo.h"
29 #include "llvm/CodeGen/MachineRegisterInfo.h"
30 #include "llvm/CodeGen/SelectionDAG.h"
31 #include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
32 #include "llvm/IR/CallingConv.h"
33 #include "llvm/IR/Constants.h"
34 #include "llvm/IR/DerivedTypes.h"
35 #include "llvm/IR/Function.h"
36 #include "llvm/IR/Intrinsics.h"
37 #include "llvm/Support/CommandLine.h"
38 #include "llvm/Support/ErrorHandling.h"
39 #include "llvm/Support/MathExtras.h"
40 #include "llvm/Support/raw_ostream.h"
41 #include "llvm/Target/TargetOptions.h"
44 // FIXME: Remove this once soft-float is supported.
45 static cl::opt<bool> DisablePPCFloatInVariadic("disable-ppc-float-in-variadic",
46 cl::desc("disable saving float registers for va_start on PPC"), cl::Hidden);
48 static cl::opt<bool> DisablePPCPreinc("disable-ppc-preinc",
49 cl::desc("disable preincrement load/store generation on PPC"), cl::Hidden);
51 static cl::opt<bool> DisableILPPref("disable-ppc-ilp-pref",
52 cl::desc("disable setting the node scheduling preference to ILP on PPC"), cl::Hidden);
54 static cl::opt<bool> DisablePPCUnaligned("disable-ppc-unaligned",
55 cl::desc("disable unaligned load/store generation on PPC"), cl::Hidden);
57 // FIXME: Remove this once the bug has been fixed!
58 extern cl::opt<bool> ANDIGlueBug;
60 PPCTargetLowering::PPCTargetLowering(const PPCTargetMachine &TM)
62 Subtarget(*TM.getSubtargetImpl()) {
63 // Use _setjmp/_longjmp instead of setjmp/longjmp.
64 setUseUnderscoreSetJmp(true);
65 setUseUnderscoreLongJmp(true);
67 // On PPC32/64, arguments smaller than 4/8 bytes are extended, so all
68 // arguments are at least 4/8 bytes aligned.
69 bool isPPC64 = Subtarget.isPPC64();
70 setMinStackArgumentAlignment(isPPC64 ? 8:4);
72 // Set up the register classes.
73 addRegisterClass(MVT::i32, &PPC::GPRCRegClass);
74 addRegisterClass(MVT::f32, &PPC::F4RCRegClass);
75 addRegisterClass(MVT::f64, &PPC::F8RCRegClass);
77 // PowerPC has an i16 but no i8 (or i1) SEXTLOAD
78 for (MVT VT : MVT::integer_valuetypes()) {
79 setLoadExtAction(ISD::SEXTLOAD, VT, MVT::i1, Promote);
80 setLoadExtAction(ISD::SEXTLOAD, VT, MVT::i8, Expand);
83 setTruncStoreAction(MVT::f64, MVT::f32, Expand);
85 // PowerPC has pre-inc load and store's.
86 setIndexedLoadAction(ISD::PRE_INC, MVT::i1, Legal);
87 setIndexedLoadAction(ISD::PRE_INC, MVT::i8, Legal);
88 setIndexedLoadAction(ISD::PRE_INC, MVT::i16, Legal);
89 setIndexedLoadAction(ISD::PRE_INC, MVT::i32, Legal);
90 setIndexedLoadAction(ISD::PRE_INC, MVT::i64, Legal);
91 setIndexedStoreAction(ISD::PRE_INC, MVT::i1, Legal);
92 setIndexedStoreAction(ISD::PRE_INC, MVT::i8, Legal);
93 setIndexedStoreAction(ISD::PRE_INC, MVT::i16, Legal);
94 setIndexedStoreAction(ISD::PRE_INC, MVT::i32, Legal);
95 setIndexedStoreAction(ISD::PRE_INC, MVT::i64, Legal);
97 if (Subtarget.useCRBits()) {
98 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1, Expand);
100 if (isPPC64 || Subtarget.hasFPCVT()) {
101 setOperationAction(ISD::SINT_TO_FP, MVT::i1, Promote);
102 AddPromotedToType (ISD::SINT_TO_FP, MVT::i1,
103 isPPC64 ? MVT::i64 : MVT::i32);
104 setOperationAction(ISD::UINT_TO_FP, MVT::i1, Promote);
105 AddPromotedToType (ISD::UINT_TO_FP, MVT::i1,
106 isPPC64 ? MVT::i64 : MVT::i32);
108 setOperationAction(ISD::SINT_TO_FP, MVT::i1, Custom);
109 setOperationAction(ISD::UINT_TO_FP, MVT::i1, Custom);
112 // PowerPC does not support direct load / store of condition registers
113 setOperationAction(ISD::LOAD, MVT::i1, Custom);
114 setOperationAction(ISD::STORE, MVT::i1, Custom);
116 // FIXME: Remove this once the ANDI glue bug is fixed:
118 setOperationAction(ISD::TRUNCATE, MVT::i1, Custom);
120 for (MVT VT : MVT::integer_valuetypes()) {
121 setLoadExtAction(ISD::SEXTLOAD, VT, MVT::i1, Promote);
122 setLoadExtAction(ISD::ZEXTLOAD, VT, MVT::i1, Promote);
123 setTruncStoreAction(VT, MVT::i1, Expand);
126 addRegisterClass(MVT::i1, &PPC::CRBITRCRegClass);
129 // This is used in the ppcf128->int sequence. Note it has different semantics
130 // from FP_ROUND: that rounds to nearest, this rounds to zero.
131 setOperationAction(ISD::FP_ROUND_INREG, MVT::ppcf128, Custom);
133 // We do not currently implement these libm ops for PowerPC.
134 setOperationAction(ISD::FFLOOR, MVT::ppcf128, Expand);
135 setOperationAction(ISD::FCEIL, MVT::ppcf128, Expand);
136 setOperationAction(ISD::FTRUNC, MVT::ppcf128, Expand);
137 setOperationAction(ISD::FRINT, MVT::ppcf128, Expand);
138 setOperationAction(ISD::FNEARBYINT, MVT::ppcf128, Expand);
139 setOperationAction(ISD::FREM, MVT::ppcf128, Expand);
141 // PowerPC has no SREM/UREM instructions
142 setOperationAction(ISD::SREM, MVT::i32, Expand);
143 setOperationAction(ISD::UREM, MVT::i32, Expand);
144 setOperationAction(ISD::SREM, MVT::i64, Expand);
145 setOperationAction(ISD::UREM, MVT::i64, Expand);
147 // Don't use SMUL_LOHI/UMUL_LOHI or SDIVREM/UDIVREM to lower SREM/UREM.
148 setOperationAction(ISD::UMUL_LOHI, MVT::i32, Expand);
149 setOperationAction(ISD::SMUL_LOHI, MVT::i32, Expand);
150 setOperationAction(ISD::UMUL_LOHI, MVT::i64, Expand);
151 setOperationAction(ISD::SMUL_LOHI, MVT::i64, Expand);
152 setOperationAction(ISD::UDIVREM, MVT::i32, Expand);
153 setOperationAction(ISD::SDIVREM, MVT::i32, Expand);
154 setOperationAction(ISD::UDIVREM, MVT::i64, Expand);
155 setOperationAction(ISD::SDIVREM, MVT::i64, Expand);
157 // We don't support sin/cos/sqrt/fmod/pow
158 setOperationAction(ISD::FSIN , MVT::f64, Expand);
159 setOperationAction(ISD::FCOS , MVT::f64, Expand);
160 setOperationAction(ISD::FSINCOS, MVT::f64, Expand);
161 setOperationAction(ISD::FREM , MVT::f64, Expand);
162 setOperationAction(ISD::FPOW , MVT::f64, Expand);
163 setOperationAction(ISD::FMA , MVT::f64, Legal);
164 setOperationAction(ISD::FSIN , MVT::f32, Expand);
165 setOperationAction(ISD::FCOS , MVT::f32, Expand);
166 setOperationAction(ISD::FSINCOS, MVT::f32, Expand);
167 setOperationAction(ISD::FREM , MVT::f32, Expand);
168 setOperationAction(ISD::FPOW , MVT::f32, Expand);
169 setOperationAction(ISD::FMA , MVT::f32, Legal);
171 setOperationAction(ISD::FLT_ROUNDS_, MVT::i32, Custom);
173 // If we're enabling GP optimizations, use hardware square root
174 if (!Subtarget.hasFSQRT() &&
175 !(TM.Options.UnsafeFPMath &&
176 Subtarget.hasFRSQRTE() && Subtarget.hasFRE()))
177 setOperationAction(ISD::FSQRT, MVT::f64, Expand);
179 if (!Subtarget.hasFSQRT() &&
180 !(TM.Options.UnsafeFPMath &&
181 Subtarget.hasFRSQRTES() && Subtarget.hasFRES()))
182 setOperationAction(ISD::FSQRT, MVT::f32, Expand);
184 if (Subtarget.hasFCPSGN()) {
185 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Legal);
186 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Legal);
188 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
189 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand);
192 if (Subtarget.hasFPRND()) {
193 setOperationAction(ISD::FFLOOR, MVT::f64, Legal);
194 setOperationAction(ISD::FCEIL, MVT::f64, Legal);
195 setOperationAction(ISD::FTRUNC, MVT::f64, Legal);
196 setOperationAction(ISD::FROUND, MVT::f64, Legal);
198 setOperationAction(ISD::FFLOOR, MVT::f32, Legal);
199 setOperationAction(ISD::FCEIL, MVT::f32, Legal);
200 setOperationAction(ISD::FTRUNC, MVT::f32, Legal);
201 setOperationAction(ISD::FROUND, MVT::f32, Legal);
204 // PowerPC does not have BSWAP, CTPOP or CTTZ
205 setOperationAction(ISD::BSWAP, MVT::i32 , Expand);
206 setOperationAction(ISD::CTTZ , MVT::i32 , Expand);
207 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i32, Expand);
208 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i32, Expand);
209 setOperationAction(ISD::BSWAP, MVT::i64 , Expand);
210 setOperationAction(ISD::CTTZ , MVT::i64 , Expand);
211 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i64, Expand);
212 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i64, Expand);
214 if (Subtarget.hasPOPCNTD()) {
215 setOperationAction(ISD::CTPOP, MVT::i32 , Legal);
216 setOperationAction(ISD::CTPOP, MVT::i64 , Legal);
218 setOperationAction(ISD::CTPOP, MVT::i32 , Expand);
219 setOperationAction(ISD::CTPOP, MVT::i64 , Expand);
222 // PowerPC does not have ROTR
223 setOperationAction(ISD::ROTR, MVT::i32 , Expand);
224 setOperationAction(ISD::ROTR, MVT::i64 , Expand);
226 if (!Subtarget.useCRBits()) {
227 // PowerPC does not have Select
228 setOperationAction(ISD::SELECT, MVT::i32, Expand);
229 setOperationAction(ISD::SELECT, MVT::i64, Expand);
230 setOperationAction(ISD::SELECT, MVT::f32, Expand);
231 setOperationAction(ISD::SELECT, MVT::f64, Expand);
234 // PowerPC wants to turn select_cc of FP into fsel when possible.
235 setOperationAction(ISD::SELECT_CC, MVT::f32, Custom);
236 setOperationAction(ISD::SELECT_CC, MVT::f64, Custom);
238 // PowerPC wants to optimize integer setcc a bit
239 if (!Subtarget.useCRBits())
240 setOperationAction(ISD::SETCC, MVT::i32, Custom);
242 // PowerPC does not have BRCOND which requires SetCC
243 if (!Subtarget.useCRBits())
244 setOperationAction(ISD::BRCOND, MVT::Other, Expand);
246 setOperationAction(ISD::BR_JT, MVT::Other, Expand);
248 // PowerPC turns FP_TO_SINT into FCTIWZ and some load/stores.
249 setOperationAction(ISD::FP_TO_SINT, MVT::i32, Custom);
251 // PowerPC does not have [U|S]INT_TO_FP
252 setOperationAction(ISD::SINT_TO_FP, MVT::i32, Expand);
253 setOperationAction(ISD::UINT_TO_FP, MVT::i32, Expand);
255 setOperationAction(ISD::BITCAST, MVT::f32, Expand);
256 setOperationAction(ISD::BITCAST, MVT::i32, Expand);
257 setOperationAction(ISD::BITCAST, MVT::i64, Expand);
258 setOperationAction(ISD::BITCAST, MVT::f64, Expand);
260 // We cannot sextinreg(i1). Expand to shifts.
261 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1, Expand);
263 // NOTE: EH_SJLJ_SETJMP/_LONGJMP supported here is NOT intended to support
264 // SjLj exception handling but a light-weight setjmp/longjmp replacement to
265 // support continuation, user-level threading, and etc.. As a result, no
266 // other SjLj exception interfaces are implemented and please don't build
267 // your own exception handling based on them.
268 // LLVM/Clang supports zero-cost DWARF exception handling.
269 setOperationAction(ISD::EH_SJLJ_SETJMP, MVT::i32, Custom);
270 setOperationAction(ISD::EH_SJLJ_LONGJMP, MVT::Other, Custom);
272 // We want to legalize GlobalAddress and ConstantPool nodes into the
273 // appropriate instructions to materialize the address.
274 setOperationAction(ISD::GlobalAddress, MVT::i32, Custom);
275 setOperationAction(ISD::GlobalTLSAddress, MVT::i32, Custom);
276 setOperationAction(ISD::BlockAddress, MVT::i32, Custom);
277 setOperationAction(ISD::ConstantPool, MVT::i32, Custom);
278 setOperationAction(ISD::JumpTable, MVT::i32, Custom);
279 setOperationAction(ISD::GlobalAddress, MVT::i64, Custom);
280 setOperationAction(ISD::GlobalTLSAddress, MVT::i64, Custom);
281 setOperationAction(ISD::BlockAddress, MVT::i64, Custom);
282 setOperationAction(ISD::ConstantPool, MVT::i64, Custom);
283 setOperationAction(ISD::JumpTable, MVT::i64, Custom);
286 setOperationAction(ISD::TRAP, MVT::Other, Legal);
288 // TRAMPOLINE is custom lowered.
289 setOperationAction(ISD::INIT_TRAMPOLINE, MVT::Other, Custom);
290 setOperationAction(ISD::ADJUST_TRAMPOLINE, MVT::Other, Custom);
292 // VASTART needs to be custom lowered to use the VarArgsFrameIndex
293 setOperationAction(ISD::VASTART , MVT::Other, Custom);
295 if (Subtarget.isSVR4ABI()) {
297 // VAARG always uses double-word chunks, so promote anything smaller.
298 setOperationAction(ISD::VAARG, MVT::i1, Promote);
299 AddPromotedToType (ISD::VAARG, MVT::i1, MVT::i64);
300 setOperationAction(ISD::VAARG, MVT::i8, Promote);
301 AddPromotedToType (ISD::VAARG, MVT::i8, MVT::i64);
302 setOperationAction(ISD::VAARG, MVT::i16, Promote);
303 AddPromotedToType (ISD::VAARG, MVT::i16, MVT::i64);
304 setOperationAction(ISD::VAARG, MVT::i32, Promote);
305 AddPromotedToType (ISD::VAARG, MVT::i32, MVT::i64);
306 setOperationAction(ISD::VAARG, MVT::Other, Expand);
308 // VAARG is custom lowered with the 32-bit SVR4 ABI.
309 setOperationAction(ISD::VAARG, MVT::Other, Custom);
310 setOperationAction(ISD::VAARG, MVT::i64, Custom);
313 setOperationAction(ISD::VAARG, MVT::Other, Expand);
315 if (Subtarget.isSVR4ABI() && !isPPC64)
316 // VACOPY is custom lowered with the 32-bit SVR4 ABI.
317 setOperationAction(ISD::VACOPY , MVT::Other, Custom);
319 setOperationAction(ISD::VACOPY , MVT::Other, Expand);
321 // Use the default implementation.
322 setOperationAction(ISD::VAEND , MVT::Other, Expand);
323 setOperationAction(ISD::STACKSAVE , MVT::Other, Expand);
324 setOperationAction(ISD::STACKRESTORE , MVT::Other, Custom);
325 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32 , Custom);
326 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i64 , Custom);
328 // We want to custom lower some of our intrinsics.
329 setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
331 // To handle counter-based loop conditions.
332 setOperationAction(ISD::INTRINSIC_W_CHAIN, MVT::i1, Custom);
334 // Comparisons that require checking two conditions.
335 setCondCodeAction(ISD::SETULT, MVT::f32, Expand);
336 setCondCodeAction(ISD::SETULT, MVT::f64, Expand);
337 setCondCodeAction(ISD::SETUGT, MVT::f32, Expand);
338 setCondCodeAction(ISD::SETUGT, MVT::f64, Expand);
339 setCondCodeAction(ISD::SETUEQ, MVT::f32, Expand);
340 setCondCodeAction(ISD::SETUEQ, MVT::f64, Expand);
341 setCondCodeAction(ISD::SETOGE, MVT::f32, Expand);
342 setCondCodeAction(ISD::SETOGE, MVT::f64, Expand);
343 setCondCodeAction(ISD::SETOLE, MVT::f32, Expand);
344 setCondCodeAction(ISD::SETOLE, MVT::f64, Expand);
345 setCondCodeAction(ISD::SETONE, MVT::f32, Expand);
346 setCondCodeAction(ISD::SETONE, MVT::f64, Expand);
348 if (Subtarget.has64BitSupport()) {
349 // They also have instructions for converting between i64 and fp.
350 setOperationAction(ISD::FP_TO_SINT, MVT::i64, Custom);
351 setOperationAction(ISD::FP_TO_UINT, MVT::i64, Expand);
352 setOperationAction(ISD::SINT_TO_FP, MVT::i64, Custom);
353 setOperationAction(ISD::UINT_TO_FP, MVT::i64, Expand);
354 // This is just the low 32 bits of a (signed) fp->i64 conversion.
355 // We cannot do this with Promote because i64 is not a legal type.
356 setOperationAction(ISD::FP_TO_UINT, MVT::i32, Custom);
358 if (Subtarget.hasLFIWAX() || Subtarget.isPPC64())
359 setOperationAction(ISD::SINT_TO_FP, MVT::i32, Custom);
361 // PowerPC does not have FP_TO_UINT on 32-bit implementations.
362 setOperationAction(ISD::FP_TO_UINT, MVT::i32, Expand);
365 // With the instructions enabled under FPCVT, we can do everything.
366 if (Subtarget.hasFPCVT()) {
367 if (Subtarget.has64BitSupport()) {
368 setOperationAction(ISD::FP_TO_SINT, MVT::i64, Custom);
369 setOperationAction(ISD::FP_TO_UINT, MVT::i64, Custom);
370 setOperationAction(ISD::SINT_TO_FP, MVT::i64, Custom);
371 setOperationAction(ISD::UINT_TO_FP, MVT::i64, Custom);
374 setOperationAction(ISD::FP_TO_SINT, MVT::i32, Custom);
375 setOperationAction(ISD::FP_TO_UINT, MVT::i32, Custom);
376 setOperationAction(ISD::SINT_TO_FP, MVT::i32, Custom);
377 setOperationAction(ISD::UINT_TO_FP, MVT::i32, Custom);
380 if (Subtarget.use64BitRegs()) {
381 // 64-bit PowerPC implementations can support i64 types directly
382 addRegisterClass(MVT::i64, &PPC::G8RCRegClass);
383 // BUILD_PAIR can't be handled natively, and should be expanded to shl/or
384 setOperationAction(ISD::BUILD_PAIR, MVT::i64, Expand);
385 // 64-bit PowerPC wants to expand i128 shifts itself.
386 setOperationAction(ISD::SHL_PARTS, MVT::i64, Custom);
387 setOperationAction(ISD::SRA_PARTS, MVT::i64, Custom);
388 setOperationAction(ISD::SRL_PARTS, MVT::i64, Custom);
390 // 32-bit PowerPC wants to expand i64 shifts itself.
391 setOperationAction(ISD::SHL_PARTS, MVT::i32, Custom);
392 setOperationAction(ISD::SRA_PARTS, MVT::i32, Custom);
393 setOperationAction(ISD::SRL_PARTS, MVT::i32, Custom);
396 if (Subtarget.hasAltivec()) {
397 // First set operation action for all vector types to expand. Then we
398 // will selectively turn on ones that can be effectively codegen'd.
399 for (MVT VT : MVT::vector_valuetypes()) {
400 // add/sub are legal for all supported vector VT's.
401 setOperationAction(ISD::ADD , VT, Legal);
402 setOperationAction(ISD::SUB , VT, Legal);
404 // We promote all shuffles to v16i8.
405 setOperationAction(ISD::VECTOR_SHUFFLE, VT, Promote);
406 AddPromotedToType (ISD::VECTOR_SHUFFLE, VT, MVT::v16i8);
408 // We promote all non-typed operations to v4i32.
409 setOperationAction(ISD::AND , VT, Promote);
410 AddPromotedToType (ISD::AND , VT, MVT::v4i32);
411 setOperationAction(ISD::OR , VT, Promote);
412 AddPromotedToType (ISD::OR , VT, MVT::v4i32);
413 setOperationAction(ISD::XOR , VT, Promote);
414 AddPromotedToType (ISD::XOR , VT, MVT::v4i32);
415 setOperationAction(ISD::LOAD , VT, Promote);
416 AddPromotedToType (ISD::LOAD , VT, MVT::v4i32);
417 setOperationAction(ISD::SELECT, VT, Promote);
418 AddPromotedToType (ISD::SELECT, VT, MVT::v4i32);
419 setOperationAction(ISD::STORE, VT, Promote);
420 AddPromotedToType (ISD::STORE, VT, MVT::v4i32);
422 // No other operations are legal.
423 setOperationAction(ISD::MUL , VT, Expand);
424 setOperationAction(ISD::SDIV, VT, Expand);
425 setOperationAction(ISD::SREM, VT, Expand);
426 setOperationAction(ISD::UDIV, VT, Expand);
427 setOperationAction(ISD::UREM, VT, Expand);
428 setOperationAction(ISD::FDIV, VT, Expand);
429 setOperationAction(ISD::FREM, VT, Expand);
430 setOperationAction(ISD::FNEG, VT, Expand);
431 setOperationAction(ISD::FSQRT, VT, Expand);
432 setOperationAction(ISD::FLOG, VT, Expand);
433 setOperationAction(ISD::FLOG10, VT, Expand);
434 setOperationAction(ISD::FLOG2, VT, Expand);
435 setOperationAction(ISD::FEXP, VT, Expand);
436 setOperationAction(ISD::FEXP2, VT, Expand);
437 setOperationAction(ISD::FSIN, VT, Expand);
438 setOperationAction(ISD::FCOS, VT, Expand);
439 setOperationAction(ISD::FABS, VT, Expand);
440 setOperationAction(ISD::FPOWI, VT, Expand);
441 setOperationAction(ISD::FFLOOR, VT, Expand);
442 setOperationAction(ISD::FCEIL, VT, Expand);
443 setOperationAction(ISD::FTRUNC, VT, Expand);
444 setOperationAction(ISD::FRINT, VT, Expand);
445 setOperationAction(ISD::FNEARBYINT, VT, Expand);
446 setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Expand);
447 setOperationAction(ISD::INSERT_VECTOR_ELT, VT, Expand);
448 setOperationAction(ISD::BUILD_VECTOR, VT, Expand);
449 setOperationAction(ISD::MULHU, VT, Expand);
450 setOperationAction(ISD::MULHS, VT, Expand);
451 setOperationAction(ISD::UMUL_LOHI, VT, Expand);
452 setOperationAction(ISD::SMUL_LOHI, VT, Expand);
453 setOperationAction(ISD::UDIVREM, VT, Expand);
454 setOperationAction(ISD::SDIVREM, VT, Expand);
455 setOperationAction(ISD::SCALAR_TO_VECTOR, VT, Expand);
456 setOperationAction(ISD::FPOW, VT, Expand);
457 setOperationAction(ISD::BSWAP, VT, Expand);
458 setOperationAction(ISD::CTPOP, VT, Expand);
459 setOperationAction(ISD::CTLZ, VT, Expand);
460 setOperationAction(ISD::CTLZ_ZERO_UNDEF, VT, Expand);
461 setOperationAction(ISD::CTTZ, VT, Expand);
462 setOperationAction(ISD::CTTZ_ZERO_UNDEF, VT, Expand);
463 setOperationAction(ISD::VSELECT, VT, Expand);
464 setOperationAction(ISD::SIGN_EXTEND_INREG, VT, Expand);
466 for (MVT InnerVT : MVT::vector_valuetypes()) {
467 setTruncStoreAction(VT, InnerVT, Expand);
468 setLoadExtAction(ISD::SEXTLOAD, VT, InnerVT, Expand);
469 setLoadExtAction(ISD::ZEXTLOAD, VT, InnerVT, Expand);
470 setLoadExtAction(ISD::EXTLOAD, VT, InnerVT, Expand);
474 // We can custom expand all VECTOR_SHUFFLEs to VPERM, others we can handle
475 // with merges, splats, etc.
476 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v16i8, Custom);
478 setOperationAction(ISD::AND , MVT::v4i32, Legal);
479 setOperationAction(ISD::OR , MVT::v4i32, Legal);
480 setOperationAction(ISD::XOR , MVT::v4i32, Legal);
481 setOperationAction(ISD::LOAD , MVT::v4i32, Legal);
482 setOperationAction(ISD::SELECT, MVT::v4i32,
483 Subtarget.useCRBits() ? Legal : Expand);
484 setOperationAction(ISD::STORE , MVT::v4i32, Legal);
485 setOperationAction(ISD::FP_TO_SINT, MVT::v4i32, Legal);
486 setOperationAction(ISD::FP_TO_UINT, MVT::v4i32, Legal);
487 setOperationAction(ISD::SINT_TO_FP, MVT::v4i32, Legal);
488 setOperationAction(ISD::UINT_TO_FP, MVT::v4i32, Legal);
489 setOperationAction(ISD::FFLOOR, MVT::v4f32, Legal);
490 setOperationAction(ISD::FCEIL, MVT::v4f32, Legal);
491 setOperationAction(ISD::FTRUNC, MVT::v4f32, Legal);
492 setOperationAction(ISD::FNEARBYINT, MVT::v4f32, Legal);
494 addRegisterClass(MVT::v4f32, &PPC::VRRCRegClass);
495 addRegisterClass(MVT::v4i32, &PPC::VRRCRegClass);
496 addRegisterClass(MVT::v8i16, &PPC::VRRCRegClass);
497 addRegisterClass(MVT::v16i8, &PPC::VRRCRegClass);
499 setOperationAction(ISD::MUL, MVT::v4f32, Legal);
500 setOperationAction(ISD::FMA, MVT::v4f32, Legal);
502 if (TM.Options.UnsafeFPMath || Subtarget.hasVSX()) {
503 setOperationAction(ISD::FDIV, MVT::v4f32, Legal);
504 setOperationAction(ISD::FSQRT, MVT::v4f32, Legal);
507 setOperationAction(ISD::MUL, MVT::v4i32, Custom);
508 setOperationAction(ISD::MUL, MVT::v8i16, Custom);
509 setOperationAction(ISD::MUL, MVT::v16i8, Custom);
511 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v4f32, Custom);
512 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v4i32, Custom);
514 setOperationAction(ISD::BUILD_VECTOR, MVT::v16i8, Custom);
515 setOperationAction(ISD::BUILD_VECTOR, MVT::v8i16, Custom);
516 setOperationAction(ISD::BUILD_VECTOR, MVT::v4i32, Custom);
517 setOperationAction(ISD::BUILD_VECTOR, MVT::v4f32, Custom);
519 // Altivec does not contain unordered floating-point compare instructions
520 setCondCodeAction(ISD::SETUO, MVT::v4f32, Expand);
521 setCondCodeAction(ISD::SETUEQ, MVT::v4f32, Expand);
522 setCondCodeAction(ISD::SETO, MVT::v4f32, Expand);
523 setCondCodeAction(ISD::SETONE, MVT::v4f32, Expand);
525 if (Subtarget.hasVSX()) {
526 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v2f64, Legal);
527 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2f64, Legal);
529 setOperationAction(ISD::FFLOOR, MVT::v2f64, Legal);
530 setOperationAction(ISD::FCEIL, MVT::v2f64, Legal);
531 setOperationAction(ISD::FTRUNC, MVT::v2f64, Legal);
532 setOperationAction(ISD::FNEARBYINT, MVT::v2f64, Legal);
533 setOperationAction(ISD::FROUND, MVT::v2f64, Legal);
535 setOperationAction(ISD::FROUND, MVT::v4f32, Legal);
537 setOperationAction(ISD::MUL, MVT::v2f64, Legal);
538 setOperationAction(ISD::FMA, MVT::v2f64, Legal);
540 setOperationAction(ISD::FDIV, MVT::v2f64, Legal);
541 setOperationAction(ISD::FSQRT, MVT::v2f64, Legal);
543 setOperationAction(ISD::VSELECT, MVT::v16i8, Legal);
544 setOperationAction(ISD::VSELECT, MVT::v8i16, Legal);
545 setOperationAction(ISD::VSELECT, MVT::v4i32, Legal);
546 setOperationAction(ISD::VSELECT, MVT::v4f32, Legal);
547 setOperationAction(ISD::VSELECT, MVT::v2f64, Legal);
549 // Share the Altivec comparison restrictions.
550 setCondCodeAction(ISD::SETUO, MVT::v2f64, Expand);
551 setCondCodeAction(ISD::SETUEQ, MVT::v2f64, Expand);
552 setCondCodeAction(ISD::SETO, MVT::v2f64, Expand);
553 setCondCodeAction(ISD::SETONE, MVT::v2f64, Expand);
555 setOperationAction(ISD::LOAD, MVT::v2f64, Legal);
556 setOperationAction(ISD::STORE, MVT::v2f64, Legal);
558 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2f64, Legal);
560 addRegisterClass(MVT::f64, &PPC::VSFRCRegClass);
562 addRegisterClass(MVT::v4f32, &PPC::VSRCRegClass);
563 addRegisterClass(MVT::v2f64, &PPC::VSRCRegClass);
565 // VSX v2i64 only supports non-arithmetic operations.
566 setOperationAction(ISD::ADD, MVT::v2i64, Expand);
567 setOperationAction(ISD::SUB, MVT::v2i64, Expand);
569 setOperationAction(ISD::SHL, MVT::v2i64, Expand);
570 setOperationAction(ISD::SRA, MVT::v2i64, Expand);
571 setOperationAction(ISD::SRL, MVT::v2i64, Expand);
573 setOperationAction(ISD::SETCC, MVT::v2i64, Custom);
575 setOperationAction(ISD::LOAD, MVT::v2i64, Promote);
576 AddPromotedToType (ISD::LOAD, MVT::v2i64, MVT::v2f64);
577 setOperationAction(ISD::STORE, MVT::v2i64, Promote);
578 AddPromotedToType (ISD::STORE, MVT::v2i64, MVT::v2f64);
580 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2i64, Legal);
582 setOperationAction(ISD::SINT_TO_FP, MVT::v2i64, Legal);
583 setOperationAction(ISD::UINT_TO_FP, MVT::v2i64, Legal);
584 setOperationAction(ISD::FP_TO_SINT, MVT::v2i64, Legal);
585 setOperationAction(ISD::FP_TO_UINT, MVT::v2i64, Legal);
587 // Vector operation legalization checks the result type of
588 // SIGN_EXTEND_INREG, overall legalization checks the inner type.
589 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::v2i64, Legal);
590 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::v2i32, Legal);
591 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::v2i16, Custom);
592 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::v2i8, Custom);
594 addRegisterClass(MVT::v2i64, &PPC::VSRCRegClass);
598 if (Subtarget.has64BitSupport())
599 setOperationAction(ISD::PREFETCH, MVT::Other, Legal);
601 setOperationAction(ISD::READCYCLECOUNTER, MVT::i64, isPPC64 ? Legal : Custom);
604 setOperationAction(ISD::ATOMIC_LOAD, MVT::i64, Expand);
605 setOperationAction(ISD::ATOMIC_STORE, MVT::i64, Expand);
608 setBooleanContents(ZeroOrOneBooleanContent);
609 // Altivec instructions set fields to all zeros or all ones.
610 setBooleanVectorContents(ZeroOrNegativeOneBooleanContent);
613 // These libcalls are not available in 32-bit.
614 setLibcallName(RTLIB::SHL_I128, nullptr);
615 setLibcallName(RTLIB::SRL_I128, nullptr);
616 setLibcallName(RTLIB::SRA_I128, nullptr);
620 setStackPointerRegisterToSaveRestore(PPC::X1);
621 setExceptionPointerRegister(PPC::X3);
622 setExceptionSelectorRegister(PPC::X4);
624 setStackPointerRegisterToSaveRestore(PPC::R1);
625 setExceptionPointerRegister(PPC::R3);
626 setExceptionSelectorRegister(PPC::R4);
629 // We have target-specific dag combine patterns for the following nodes:
630 setTargetDAGCombine(ISD::SINT_TO_FP);
631 if (Subtarget.hasFPCVT())
632 setTargetDAGCombine(ISD::UINT_TO_FP);
633 setTargetDAGCombine(ISD::LOAD);
634 setTargetDAGCombine(ISD::STORE);
635 setTargetDAGCombine(ISD::BR_CC);
636 if (Subtarget.useCRBits())
637 setTargetDAGCombine(ISD::BRCOND);
638 setTargetDAGCombine(ISD::BSWAP);
639 setTargetDAGCombine(ISD::INTRINSIC_WO_CHAIN);
640 setTargetDAGCombine(ISD::INTRINSIC_W_CHAIN);
641 setTargetDAGCombine(ISD::INTRINSIC_VOID);
643 setTargetDAGCombine(ISD::SIGN_EXTEND);
644 setTargetDAGCombine(ISD::ZERO_EXTEND);
645 setTargetDAGCombine(ISD::ANY_EXTEND);
647 if (Subtarget.useCRBits()) {
648 setTargetDAGCombine(ISD::TRUNCATE);
649 setTargetDAGCombine(ISD::SETCC);
650 setTargetDAGCombine(ISD::SELECT_CC);
653 // Use reciprocal estimates.
654 if (TM.Options.UnsafeFPMath) {
655 setTargetDAGCombine(ISD::FDIV);
656 setTargetDAGCombine(ISD::FSQRT);
659 // Darwin long double math library functions have $LDBL128 appended.
660 if (Subtarget.isDarwin()) {
661 setLibcallName(RTLIB::COS_PPCF128, "cosl$LDBL128");
662 setLibcallName(RTLIB::POW_PPCF128, "powl$LDBL128");
663 setLibcallName(RTLIB::REM_PPCF128, "fmodl$LDBL128");
664 setLibcallName(RTLIB::SIN_PPCF128, "sinl$LDBL128");
665 setLibcallName(RTLIB::SQRT_PPCF128, "sqrtl$LDBL128");
666 setLibcallName(RTLIB::LOG_PPCF128, "logl$LDBL128");
667 setLibcallName(RTLIB::LOG2_PPCF128, "log2l$LDBL128");
668 setLibcallName(RTLIB::LOG10_PPCF128, "log10l$LDBL128");
669 setLibcallName(RTLIB::EXP_PPCF128, "expl$LDBL128");
670 setLibcallName(RTLIB::EXP2_PPCF128, "exp2l$LDBL128");
673 // With 32 condition bits, we don't need to sink (and duplicate) compares
674 // aggressively in CodeGenPrep.
675 if (Subtarget.useCRBits())
676 setHasMultipleConditionRegisters();
678 setMinFunctionAlignment(2);
679 if (Subtarget.isDarwin())
680 setPrefFunctionAlignment(4);
682 switch (Subtarget.getDarwinDirective()) {
686 case PPC::DIR_E500mc:
695 setPrefFunctionAlignment(4);
696 setPrefLoopAlignment(4);
700 setInsertFencesForAtomic(true);
702 if (Subtarget.enableMachineScheduler())
703 setSchedulingPreference(Sched::Source);
705 setSchedulingPreference(Sched::Hybrid);
707 computeRegisterProperties();
709 // The Freescale cores do better with aggressive inlining of memcpy and
710 // friends. GCC uses same threshold of 128 bytes (= 32 word stores).
711 if (Subtarget.getDarwinDirective() == PPC::DIR_E500mc ||
712 Subtarget.getDarwinDirective() == PPC::DIR_E5500) {
713 MaxStoresPerMemset = 32;
714 MaxStoresPerMemsetOptSize = 16;
715 MaxStoresPerMemcpy = 32;
716 MaxStoresPerMemcpyOptSize = 8;
717 MaxStoresPerMemmove = 32;
718 MaxStoresPerMemmoveOptSize = 8;
722 /// getMaxByValAlign - Helper for getByValTypeAlignment to determine
723 /// the desired ByVal argument alignment.
724 static void getMaxByValAlign(Type *Ty, unsigned &MaxAlign,
725 unsigned MaxMaxAlign) {
726 if (MaxAlign == MaxMaxAlign)
728 if (VectorType *VTy = dyn_cast<VectorType>(Ty)) {
729 if (MaxMaxAlign >= 32 && VTy->getBitWidth() >= 256)
731 else if (VTy->getBitWidth() >= 128 && MaxAlign < 16)
733 } else if (ArrayType *ATy = dyn_cast<ArrayType>(Ty)) {
734 unsigned EltAlign = 0;
735 getMaxByValAlign(ATy->getElementType(), EltAlign, MaxMaxAlign);
736 if (EltAlign > MaxAlign)
738 } else if (StructType *STy = dyn_cast<StructType>(Ty)) {
739 for (unsigned i = 0, e = STy->getNumElements(); i != e; ++i) {
740 unsigned EltAlign = 0;
741 getMaxByValAlign(STy->getElementType(i), EltAlign, MaxMaxAlign);
742 if (EltAlign > MaxAlign)
744 if (MaxAlign == MaxMaxAlign)
750 /// getByValTypeAlignment - Return the desired alignment for ByVal aggregate
751 /// function arguments in the caller parameter area.
752 unsigned PPCTargetLowering::getByValTypeAlignment(Type *Ty) const {
753 // Darwin passes everything on 4 byte boundary.
754 if (Subtarget.isDarwin())
757 // 16byte and wider vectors are passed on 16byte boundary.
758 // The rest is 8 on PPC64 and 4 on PPC32 boundary.
759 unsigned Align = Subtarget.isPPC64() ? 8 : 4;
760 if (Subtarget.hasAltivec() || Subtarget.hasQPX())
761 getMaxByValAlign(Ty, Align, Subtarget.hasQPX() ? 32 : 16);
765 const char *PPCTargetLowering::getTargetNodeName(unsigned Opcode) const {
767 default: return nullptr;
768 case PPCISD::FSEL: return "PPCISD::FSEL";
769 case PPCISD::FCFID: return "PPCISD::FCFID";
770 case PPCISD::FCFIDU: return "PPCISD::FCFIDU";
771 case PPCISD::FCFIDS: return "PPCISD::FCFIDS";
772 case PPCISD::FCFIDUS: return "PPCISD::FCFIDUS";
773 case PPCISD::FCTIDZ: return "PPCISD::FCTIDZ";
774 case PPCISD::FCTIWZ: return "PPCISD::FCTIWZ";
775 case PPCISD::FCTIDUZ: return "PPCISD::FCTIDUZ";
776 case PPCISD::FCTIWUZ: return "PPCISD::FCTIWUZ";
777 case PPCISD::FRE: return "PPCISD::FRE";
778 case PPCISD::FRSQRTE: return "PPCISD::FRSQRTE";
779 case PPCISD::STFIWX: return "PPCISD::STFIWX";
780 case PPCISD::VMADDFP: return "PPCISD::VMADDFP";
781 case PPCISD::VNMSUBFP: return "PPCISD::VNMSUBFP";
782 case PPCISD::VPERM: return "PPCISD::VPERM";
783 case PPCISD::CMPB: return "PPCISD::CMPB";
784 case PPCISD::Hi: return "PPCISD::Hi";
785 case PPCISD::Lo: return "PPCISD::Lo";
786 case PPCISD::TOC_ENTRY: return "PPCISD::TOC_ENTRY";
787 case PPCISD::LOAD: return "PPCISD::LOAD";
788 case PPCISD::LOAD_TOC: return "PPCISD::LOAD_TOC";
789 case PPCISD::DYNALLOC: return "PPCISD::DYNALLOC";
790 case PPCISD::GlobalBaseReg: return "PPCISD::GlobalBaseReg";
791 case PPCISD::SRL: return "PPCISD::SRL";
792 case PPCISD::SRA: return "PPCISD::SRA";
793 case PPCISD::SHL: return "PPCISD::SHL";
794 case PPCISD::CALL: return "PPCISD::CALL";
795 case PPCISD::CALL_NOP: return "PPCISD::CALL_NOP";
796 case PPCISD::CALL_TLS: return "PPCISD::CALL_TLS";
797 case PPCISD::CALL_NOP_TLS: return "PPCISD::CALL_NOP_TLS";
798 case PPCISD::MTCTR: return "PPCISD::MTCTR";
799 case PPCISD::BCTRL: return "PPCISD::BCTRL";
800 case PPCISD::BCTRL_LOAD_TOC: return "PPCISD::BCTRL_LOAD_TOC";
801 case PPCISD::RET_FLAG: return "PPCISD::RET_FLAG";
802 case PPCISD::READ_TIME_BASE: return "PPCISD::READ_TIME_BASE";
803 case PPCISD::EH_SJLJ_SETJMP: return "PPCISD::EH_SJLJ_SETJMP";
804 case PPCISD::EH_SJLJ_LONGJMP: return "PPCISD::EH_SJLJ_LONGJMP";
805 case PPCISD::MFOCRF: return "PPCISD::MFOCRF";
806 case PPCISD::VCMP: return "PPCISD::VCMP";
807 case PPCISD::VCMPo: return "PPCISD::VCMPo";
808 case PPCISD::LBRX: return "PPCISD::LBRX";
809 case PPCISD::STBRX: return "PPCISD::STBRX";
810 case PPCISD::LFIWAX: return "PPCISD::LFIWAX";
811 case PPCISD::LFIWZX: return "PPCISD::LFIWZX";
812 case PPCISD::LARX: return "PPCISD::LARX";
813 case PPCISD::STCX: return "PPCISD::STCX";
814 case PPCISD::COND_BRANCH: return "PPCISD::COND_BRANCH";
815 case PPCISD::BDNZ: return "PPCISD::BDNZ";
816 case PPCISD::BDZ: return "PPCISD::BDZ";
817 case PPCISD::MFFS: return "PPCISD::MFFS";
818 case PPCISD::FADDRTZ: return "PPCISD::FADDRTZ";
819 case PPCISD::TC_RETURN: return "PPCISD::TC_RETURN";
820 case PPCISD::CR6SET: return "PPCISD::CR6SET";
821 case PPCISD::CR6UNSET: return "PPCISD::CR6UNSET";
822 case PPCISD::ADDIS_TOC_HA: return "PPCISD::ADDIS_TOC_HA";
823 case PPCISD::LD_TOC_L: return "PPCISD::LD_TOC_L";
824 case PPCISD::ADDI_TOC_L: return "PPCISD::ADDI_TOC_L";
825 case PPCISD::PPC32_GOT: return "PPCISD::PPC32_GOT";
826 case PPCISD::ADDIS_GOT_TPREL_HA: return "PPCISD::ADDIS_GOT_TPREL_HA";
827 case PPCISD::LD_GOT_TPREL_L: return "PPCISD::LD_GOT_TPREL_L";
828 case PPCISD::ADD_TLS: return "PPCISD::ADD_TLS";
829 case PPCISD::ADDIS_TLSGD_HA: return "PPCISD::ADDIS_TLSGD_HA";
830 case PPCISD::ADDI_TLSGD_L: return "PPCISD::ADDI_TLSGD_L";
831 case PPCISD::ADDIS_TLSLD_HA: return "PPCISD::ADDIS_TLSLD_HA";
832 case PPCISD::ADDI_TLSLD_L: return "PPCISD::ADDI_TLSLD_L";
833 case PPCISD::ADDIS_DTPREL_HA: return "PPCISD::ADDIS_DTPREL_HA";
834 case PPCISD::ADDI_DTPREL_L: return "PPCISD::ADDI_DTPREL_L";
835 case PPCISD::VADD_SPLAT: return "PPCISD::VADD_SPLAT";
836 case PPCISD::SC: return "PPCISD::SC";
840 EVT PPCTargetLowering::getSetCCResultType(LLVMContext &, EVT VT) const {
842 return Subtarget.useCRBits() ? MVT::i1 : MVT::i32;
843 return VT.changeVectorElementTypeToInteger();
846 bool PPCTargetLowering::enableAggressiveFMAFusion(EVT VT) const {
847 assert(VT.isFloatingPoint() && "Non-floating-point FMA?");
851 //===----------------------------------------------------------------------===//
852 // Node matching predicates, for use by the tblgen matching code.
853 //===----------------------------------------------------------------------===//
855 /// isFloatingPointZero - Return true if this is 0.0 or -0.0.
856 static bool isFloatingPointZero(SDValue Op) {
857 if (ConstantFPSDNode *CFP = dyn_cast<ConstantFPSDNode>(Op))
858 return CFP->getValueAPF().isZero();
859 else if (ISD::isEXTLoad(Op.getNode()) || ISD::isNON_EXTLoad(Op.getNode())) {
860 // Maybe this has already been legalized into the constant pool?
861 if (ConstantPoolSDNode *CP = dyn_cast<ConstantPoolSDNode>(Op.getOperand(1)))
862 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CP->getConstVal()))
863 return CFP->getValueAPF().isZero();
868 /// isConstantOrUndef - Op is either an undef node or a ConstantSDNode. Return
869 /// true if Op is undef or if it matches the specified value.
870 static bool isConstantOrUndef(int Op, int Val) {
871 return Op < 0 || Op == Val;
874 /// isVPKUHUMShuffleMask - Return true if this is the shuffle mask for a
875 /// VPKUHUM instruction.
876 /// The ShuffleKind distinguishes between big-endian operations with
877 /// two different inputs (0), either-endian operations with two identical
878 /// inputs (1), and little-endian operantion with two different inputs (2).
879 /// For the latter, the input operands are swapped (see PPCInstrAltivec.td).
880 bool PPC::isVPKUHUMShuffleMask(ShuffleVectorSDNode *N, unsigned ShuffleKind,
882 bool IsLE = DAG.getSubtarget().getDataLayout()->isLittleEndian();
883 if (ShuffleKind == 0) {
886 for (unsigned i = 0; i != 16; ++i)
887 if (!isConstantOrUndef(N->getMaskElt(i), i*2+1))
889 } else if (ShuffleKind == 2) {
892 for (unsigned i = 0; i != 16; ++i)
893 if (!isConstantOrUndef(N->getMaskElt(i), i*2))
895 } else if (ShuffleKind == 1) {
896 unsigned j = IsLE ? 0 : 1;
897 for (unsigned i = 0; i != 8; ++i)
898 if (!isConstantOrUndef(N->getMaskElt(i), i*2+j) ||
899 !isConstantOrUndef(N->getMaskElt(i+8), i*2+j))
905 /// isVPKUWUMShuffleMask - Return true if this is the shuffle mask for a
906 /// VPKUWUM instruction.
907 /// The ShuffleKind distinguishes between big-endian operations with
908 /// two different inputs (0), either-endian operations with two identical
909 /// inputs (1), and little-endian operantion with two different inputs (2).
910 /// For the latter, the input operands are swapped (see PPCInstrAltivec.td).
911 bool PPC::isVPKUWUMShuffleMask(ShuffleVectorSDNode *N, unsigned ShuffleKind,
913 bool IsLE = DAG.getSubtarget().getDataLayout()->isLittleEndian();
914 if (ShuffleKind == 0) {
917 for (unsigned i = 0; i != 16; i += 2)
918 if (!isConstantOrUndef(N->getMaskElt(i ), i*2+2) ||
919 !isConstantOrUndef(N->getMaskElt(i+1), i*2+3))
921 } else if (ShuffleKind == 2) {
924 for (unsigned i = 0; i != 16; i += 2)
925 if (!isConstantOrUndef(N->getMaskElt(i ), i*2) ||
926 !isConstantOrUndef(N->getMaskElt(i+1), i*2+1))
928 } else if (ShuffleKind == 1) {
929 unsigned j = IsLE ? 0 : 2;
930 for (unsigned i = 0; i != 8; i += 2)
931 if (!isConstantOrUndef(N->getMaskElt(i ), i*2+j) ||
932 !isConstantOrUndef(N->getMaskElt(i+1), i*2+j+1) ||
933 !isConstantOrUndef(N->getMaskElt(i+8), i*2+j) ||
934 !isConstantOrUndef(N->getMaskElt(i+9), i*2+j+1))
940 /// isVMerge - Common function, used to match vmrg* shuffles.
942 static bool isVMerge(ShuffleVectorSDNode *N, unsigned UnitSize,
943 unsigned LHSStart, unsigned RHSStart) {
944 if (N->getValueType(0) != MVT::v16i8)
946 assert((UnitSize == 1 || UnitSize == 2 || UnitSize == 4) &&
947 "Unsupported merge size!");
949 for (unsigned i = 0; i != 8/UnitSize; ++i) // Step over units
950 for (unsigned j = 0; j != UnitSize; ++j) { // Step over bytes within unit
951 if (!isConstantOrUndef(N->getMaskElt(i*UnitSize*2+j),
952 LHSStart+j+i*UnitSize) ||
953 !isConstantOrUndef(N->getMaskElt(i*UnitSize*2+UnitSize+j),
954 RHSStart+j+i*UnitSize))
960 /// isVMRGLShuffleMask - Return true if this is a shuffle mask suitable for
961 /// a VMRGL* instruction with the specified unit size (1,2 or 4 bytes).
962 /// The ShuffleKind distinguishes between big-endian merges with two
963 /// different inputs (0), either-endian merges with two identical inputs (1),
964 /// and little-endian merges with two different inputs (2). For the latter,
965 /// the input operands are swapped (see PPCInstrAltivec.td).
966 bool PPC::isVMRGLShuffleMask(ShuffleVectorSDNode *N, unsigned UnitSize,
967 unsigned ShuffleKind, SelectionDAG &DAG) {
968 if (DAG.getSubtarget().getDataLayout()->isLittleEndian()) {
969 if (ShuffleKind == 1) // unary
970 return isVMerge(N, UnitSize, 0, 0);
971 else if (ShuffleKind == 2) // swapped
972 return isVMerge(N, UnitSize, 0, 16);
976 if (ShuffleKind == 1) // unary
977 return isVMerge(N, UnitSize, 8, 8);
978 else if (ShuffleKind == 0) // normal
979 return isVMerge(N, UnitSize, 8, 24);
985 /// isVMRGHShuffleMask - Return true if this is a shuffle mask suitable for
986 /// a VMRGH* instruction with the specified unit size (1,2 or 4 bytes).
987 /// The ShuffleKind distinguishes between big-endian merges with two
988 /// different inputs (0), either-endian merges with two identical inputs (1),
989 /// and little-endian merges with two different inputs (2). For the latter,
990 /// the input operands are swapped (see PPCInstrAltivec.td).
991 bool PPC::isVMRGHShuffleMask(ShuffleVectorSDNode *N, unsigned UnitSize,
992 unsigned ShuffleKind, SelectionDAG &DAG) {
993 if (DAG.getSubtarget().getDataLayout()->isLittleEndian()) {
994 if (ShuffleKind == 1) // unary
995 return isVMerge(N, UnitSize, 8, 8);
996 else if (ShuffleKind == 2) // swapped
997 return isVMerge(N, UnitSize, 8, 24);
1001 if (ShuffleKind == 1) // unary
1002 return isVMerge(N, UnitSize, 0, 0);
1003 else if (ShuffleKind == 0) // normal
1004 return isVMerge(N, UnitSize, 0, 16);
1011 /// isVSLDOIShuffleMask - If this is a vsldoi shuffle mask, return the shift
1012 /// amount, otherwise return -1.
1013 /// The ShuffleKind distinguishes between big-endian operations with two
1014 /// different inputs (0), either-endian operations with two identical inputs
1015 /// (1), and little-endian operations with two different inputs (2). For the
1016 /// latter, the input operands are swapped (see PPCInstrAltivec.td).
1017 int PPC::isVSLDOIShuffleMask(SDNode *N, unsigned ShuffleKind,
1018 SelectionDAG &DAG) {
1019 if (N->getValueType(0) != MVT::v16i8)
1022 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
1024 // Find the first non-undef value in the shuffle mask.
1026 for (i = 0; i != 16 && SVOp->getMaskElt(i) < 0; ++i)
1029 if (i == 16) return -1; // all undef.
1031 // Otherwise, check to see if the rest of the elements are consecutively
1032 // numbered from this value.
1033 unsigned ShiftAmt = SVOp->getMaskElt(i);
1034 if (ShiftAmt < i) return -1;
1037 bool isLE = DAG.getTarget().getSubtargetImpl()->getDataLayout()->
1040 if ((ShuffleKind == 0 && !isLE) || (ShuffleKind == 2 && isLE)) {
1041 // Check the rest of the elements to see if they are consecutive.
1042 for (++i; i != 16; ++i)
1043 if (!isConstantOrUndef(SVOp->getMaskElt(i), ShiftAmt+i))
1045 } else if (ShuffleKind == 1) {
1046 // Check the rest of the elements to see if they are consecutive.
1047 for (++i; i != 16; ++i)
1048 if (!isConstantOrUndef(SVOp->getMaskElt(i), (ShiftAmt+i) & 15))
1053 if (ShuffleKind == 2 && isLE)
1054 ShiftAmt = 16 - ShiftAmt;
1059 /// isSplatShuffleMask - Return true if the specified VECTOR_SHUFFLE operand
1060 /// specifies a splat of a single element that is suitable for input to
1061 /// VSPLTB/VSPLTH/VSPLTW.
1062 bool PPC::isSplatShuffleMask(ShuffleVectorSDNode *N, unsigned EltSize) {
1063 assert(N->getValueType(0) == MVT::v16i8 &&
1064 (EltSize == 1 || EltSize == 2 || EltSize == 4));
1066 // This is a splat operation if each element of the permute is the same, and
1067 // if the value doesn't reference the second vector.
1068 unsigned ElementBase = N->getMaskElt(0);
1070 // FIXME: Handle UNDEF elements too!
1071 if (ElementBase >= 16)
1074 // Check that the indices are consecutive, in the case of a multi-byte element
1075 // splatted with a v16i8 mask.
1076 for (unsigned i = 1; i != EltSize; ++i)
1077 if (N->getMaskElt(i) < 0 || N->getMaskElt(i) != (int)(i+ElementBase))
1080 for (unsigned i = EltSize, e = 16; i != e; i += EltSize) {
1081 if (N->getMaskElt(i) < 0) continue;
1082 for (unsigned j = 0; j != EltSize; ++j)
1083 if (N->getMaskElt(i+j) != N->getMaskElt(j))
1089 /// isAllNegativeZeroVector - Returns true if all elements of build_vector
1091 bool PPC::isAllNegativeZeroVector(SDNode *N) {
1092 BuildVectorSDNode *BV = cast<BuildVectorSDNode>(N);
1094 APInt APVal, APUndef;
1098 if (BV->isConstantSplat(APVal, APUndef, BitSize, HasAnyUndefs, 32, true))
1099 if (ConstantFPSDNode *CFP = dyn_cast<ConstantFPSDNode>(N->getOperand(0)))
1100 return CFP->getValueAPF().isNegZero();
1105 /// getVSPLTImmediate - Return the appropriate VSPLT* immediate to splat the
1106 /// specified isSplatShuffleMask VECTOR_SHUFFLE mask.
1107 unsigned PPC::getVSPLTImmediate(SDNode *N, unsigned EltSize,
1108 SelectionDAG &DAG) {
1109 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
1110 assert(isSplatShuffleMask(SVOp, EltSize));
1111 if (DAG.getSubtarget().getDataLayout()->isLittleEndian())
1112 return (16 / EltSize) - 1 - (SVOp->getMaskElt(0) / EltSize);
1114 return SVOp->getMaskElt(0) / EltSize;
1117 /// get_VSPLTI_elt - If this is a build_vector of constants which can be formed
1118 /// by using a vspltis[bhw] instruction of the specified element size, return
1119 /// the constant being splatted. The ByteSize field indicates the number of
1120 /// bytes of each element [124] -> [bhw].
1121 SDValue PPC::get_VSPLTI_elt(SDNode *N, unsigned ByteSize, SelectionDAG &DAG) {
1122 SDValue OpVal(nullptr, 0);
1124 // If ByteSize of the splat is bigger than the element size of the
1125 // build_vector, then we have a case where we are checking for a splat where
1126 // multiple elements of the buildvector are folded together into a single
1127 // logical element of the splat (e.g. "vsplish 1" to splat {0,1}*8).
1128 unsigned EltSize = 16/N->getNumOperands();
1129 if (EltSize < ByteSize) {
1130 unsigned Multiple = ByteSize/EltSize; // Number of BV entries per spltval.
1131 SDValue UniquedVals[4];
1132 assert(Multiple > 1 && Multiple <= 4 && "How can this happen?");
1134 // See if all of the elements in the buildvector agree across.
1135 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
1136 if (N->getOperand(i).getOpcode() == ISD::UNDEF) continue;
1137 // If the element isn't a constant, bail fully out.
1138 if (!isa<ConstantSDNode>(N->getOperand(i))) return SDValue();
1141 if (!UniquedVals[i&(Multiple-1)].getNode())
1142 UniquedVals[i&(Multiple-1)] = N->getOperand(i);
1143 else if (UniquedVals[i&(Multiple-1)] != N->getOperand(i))
1144 return SDValue(); // no match.
1147 // Okay, if we reached this point, UniquedVals[0..Multiple-1] contains
1148 // either constant or undef values that are identical for each chunk. See
1149 // if these chunks can form into a larger vspltis*.
1151 // Check to see if all of the leading entries are either 0 or -1. If
1152 // neither, then this won't fit into the immediate field.
1153 bool LeadingZero = true;
1154 bool LeadingOnes = true;
1155 for (unsigned i = 0; i != Multiple-1; ++i) {
1156 if (!UniquedVals[i].getNode()) continue; // Must have been undefs.
1158 LeadingZero &= cast<ConstantSDNode>(UniquedVals[i])->isNullValue();
1159 LeadingOnes &= cast<ConstantSDNode>(UniquedVals[i])->isAllOnesValue();
1161 // Finally, check the least significant entry.
1163 if (!UniquedVals[Multiple-1].getNode())
1164 return DAG.getTargetConstant(0, MVT::i32); // 0,0,0,undef
1165 int Val = cast<ConstantSDNode>(UniquedVals[Multiple-1])->getZExtValue();
1167 return DAG.getTargetConstant(Val, MVT::i32); // 0,0,0,4 -> vspltisw(4)
1170 if (!UniquedVals[Multiple-1].getNode())
1171 return DAG.getTargetConstant(~0U, MVT::i32); // -1,-1,-1,undef
1172 int Val =cast<ConstantSDNode>(UniquedVals[Multiple-1])->getSExtValue();
1173 if (Val >= -16) // -1,-1,-1,-2 -> vspltisw(-2)
1174 return DAG.getTargetConstant(Val, MVT::i32);
1180 // Check to see if this buildvec has a single non-undef value in its elements.
1181 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
1182 if (N->getOperand(i).getOpcode() == ISD::UNDEF) continue;
1183 if (!OpVal.getNode())
1184 OpVal = N->getOperand(i);
1185 else if (OpVal != N->getOperand(i))
1189 if (!OpVal.getNode()) return SDValue(); // All UNDEF: use implicit def.
1191 unsigned ValSizeInBytes = EltSize;
1193 if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(OpVal)) {
1194 Value = CN->getZExtValue();
1195 } else if (ConstantFPSDNode *CN = dyn_cast<ConstantFPSDNode>(OpVal)) {
1196 assert(CN->getValueType(0) == MVT::f32 && "Only one legal FP vector type!");
1197 Value = FloatToBits(CN->getValueAPF().convertToFloat());
1200 // If the splat value is larger than the element value, then we can never do
1201 // this splat. The only case that we could fit the replicated bits into our
1202 // immediate field for would be zero, and we prefer to use vxor for it.
1203 if (ValSizeInBytes < ByteSize) return SDValue();
1205 // If the element value is larger than the splat value, cut it in half and
1206 // check to see if the two halves are equal. Continue doing this until we
1207 // get to ByteSize. This allows us to handle 0x01010101 as 0x01.
1208 while (ValSizeInBytes > ByteSize) {
1209 ValSizeInBytes >>= 1;
1211 // If the top half equals the bottom half, we're still ok.
1212 if (((Value >> (ValSizeInBytes*8)) & ((1 << (8*ValSizeInBytes))-1)) !=
1213 (Value & ((1 << (8*ValSizeInBytes))-1)))
1217 // Properly sign extend the value.
1218 int MaskVal = SignExtend32(Value, ByteSize * 8);
1220 // If this is zero, don't match, zero matches ISD::isBuildVectorAllZeros.
1221 if (MaskVal == 0) return SDValue();
1223 // Finally, if this value fits in a 5 bit sext field, return it
1224 if (SignExtend32<5>(MaskVal) == MaskVal)
1225 return DAG.getTargetConstant(MaskVal, MVT::i32);
1229 //===----------------------------------------------------------------------===//
1230 // Addressing Mode Selection
1231 //===----------------------------------------------------------------------===//
1233 /// isIntS16Immediate - This method tests to see if the node is either a 32-bit
1234 /// or 64-bit immediate, and if the value can be accurately represented as a
1235 /// sign extension from a 16-bit value. If so, this returns true and the
1237 static bool isIntS16Immediate(SDNode *N, short &Imm) {
1238 if (!isa<ConstantSDNode>(N))
1241 Imm = (short)cast<ConstantSDNode>(N)->getZExtValue();
1242 if (N->getValueType(0) == MVT::i32)
1243 return Imm == (int32_t)cast<ConstantSDNode>(N)->getZExtValue();
1245 return Imm == (int64_t)cast<ConstantSDNode>(N)->getZExtValue();
1247 static bool isIntS16Immediate(SDValue Op, short &Imm) {
1248 return isIntS16Immediate(Op.getNode(), Imm);
1252 /// SelectAddressRegReg - Given the specified addressed, check to see if it
1253 /// can be represented as an indexed [r+r] operation. Returns false if it
1254 /// can be more efficiently represented with [r+imm].
1255 bool PPCTargetLowering::SelectAddressRegReg(SDValue N, SDValue &Base,
1257 SelectionDAG &DAG) const {
1259 if (N.getOpcode() == ISD::ADD) {
1260 if (isIntS16Immediate(N.getOperand(1), imm))
1261 return false; // r+i
1262 if (N.getOperand(1).getOpcode() == PPCISD::Lo)
1263 return false; // r+i
1265 Base = N.getOperand(0);
1266 Index = N.getOperand(1);
1268 } else if (N.getOpcode() == ISD::OR) {
1269 if (isIntS16Immediate(N.getOperand(1), imm))
1270 return false; // r+i can fold it if we can.
1272 // If this is an or of disjoint bitfields, we can codegen this as an add
1273 // (for better address arithmetic) if the LHS and RHS of the OR are provably
1275 APInt LHSKnownZero, LHSKnownOne;
1276 APInt RHSKnownZero, RHSKnownOne;
1277 DAG.computeKnownBits(N.getOperand(0),
1278 LHSKnownZero, LHSKnownOne);
1280 if (LHSKnownZero.getBoolValue()) {
1281 DAG.computeKnownBits(N.getOperand(1),
1282 RHSKnownZero, RHSKnownOne);
1283 // If all of the bits are known zero on the LHS or RHS, the add won't
1285 if (~(LHSKnownZero | RHSKnownZero) == 0) {
1286 Base = N.getOperand(0);
1287 Index = N.getOperand(1);
1296 // If we happen to be doing an i64 load or store into a stack slot that has
1297 // less than a 4-byte alignment, then the frame-index elimination may need to
1298 // use an indexed load or store instruction (because the offset may not be a
1299 // multiple of 4). The extra register needed to hold the offset comes from the
1300 // register scavenger, and it is possible that the scavenger will need to use
1301 // an emergency spill slot. As a result, we need to make sure that a spill slot
1302 // is allocated when doing an i64 load/store into a less-than-4-byte-aligned
1304 static void fixupFuncForFI(SelectionDAG &DAG, int FrameIdx, EVT VT) {
1305 // FIXME: This does not handle the LWA case.
1309 // NOTE: We'll exclude negative FIs here, which come from argument
1310 // lowering, because there are no known test cases triggering this problem
1311 // using packed structures (or similar). We can remove this exclusion if
1312 // we find such a test case. The reason why this is so test-case driven is
1313 // because this entire 'fixup' is only to prevent crashes (from the
1314 // register scavenger) on not-really-valid inputs. For example, if we have:
1316 // %b = bitcast i1* %a to i64*
1317 // store i64* a, i64 b
1318 // then the store should really be marked as 'align 1', but is not. If it
1319 // were marked as 'align 1' then the indexed form would have been
1320 // instruction-selected initially, and the problem this 'fixup' is preventing
1321 // won't happen regardless.
1325 MachineFunction &MF = DAG.getMachineFunction();
1326 MachineFrameInfo *MFI = MF.getFrameInfo();
1328 unsigned Align = MFI->getObjectAlignment(FrameIdx);
1332 PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>();
1333 FuncInfo->setHasNonRISpills();
1336 /// Returns true if the address N can be represented by a base register plus
1337 /// a signed 16-bit displacement [r+imm], and if it is not better
1338 /// represented as reg+reg. If Aligned is true, only accept displacements
1339 /// suitable for STD and friends, i.e. multiples of 4.
1340 bool PPCTargetLowering::SelectAddressRegImm(SDValue N, SDValue &Disp,
1343 bool Aligned) const {
1344 // FIXME dl should come from parent load or store, not from address
1346 // If this can be more profitably realized as r+r, fail.
1347 if (SelectAddressRegReg(N, Disp, Base, DAG))
1350 if (N.getOpcode() == ISD::ADD) {
1352 if (isIntS16Immediate(N.getOperand(1), imm) &&
1353 (!Aligned || (imm & 3) == 0)) {
1354 Disp = DAG.getTargetConstant(imm, N.getValueType());
1355 if (FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(N.getOperand(0))) {
1356 Base = DAG.getTargetFrameIndex(FI->getIndex(), N.getValueType());
1357 fixupFuncForFI(DAG, FI->getIndex(), N.getValueType());
1359 Base = N.getOperand(0);
1361 return true; // [r+i]
1362 } else if (N.getOperand(1).getOpcode() == PPCISD::Lo) {
1363 // Match LOAD (ADD (X, Lo(G))).
1364 assert(!cast<ConstantSDNode>(N.getOperand(1).getOperand(1))->getZExtValue()
1365 && "Cannot handle constant offsets yet!");
1366 Disp = N.getOperand(1).getOperand(0); // The global address.
1367 assert(Disp.getOpcode() == ISD::TargetGlobalAddress ||
1368 Disp.getOpcode() == ISD::TargetGlobalTLSAddress ||
1369 Disp.getOpcode() == ISD::TargetConstantPool ||
1370 Disp.getOpcode() == ISD::TargetJumpTable);
1371 Base = N.getOperand(0);
1372 return true; // [&g+r]
1374 } else if (N.getOpcode() == ISD::OR) {
1376 if (isIntS16Immediate(N.getOperand(1), imm) &&
1377 (!Aligned || (imm & 3) == 0)) {
1378 // If this is an or of disjoint bitfields, we can codegen this as an add
1379 // (for better address arithmetic) if the LHS and RHS of the OR are
1380 // provably disjoint.
1381 APInt LHSKnownZero, LHSKnownOne;
1382 DAG.computeKnownBits(N.getOperand(0), LHSKnownZero, LHSKnownOne);
1384 if ((LHSKnownZero.getZExtValue()|~(uint64_t)imm) == ~0ULL) {
1385 // If all of the bits are known zero on the LHS or RHS, the add won't
1387 if (FrameIndexSDNode *FI =
1388 dyn_cast<FrameIndexSDNode>(N.getOperand(0))) {
1389 Base = DAG.getTargetFrameIndex(FI->getIndex(), N.getValueType());
1390 fixupFuncForFI(DAG, FI->getIndex(), N.getValueType());
1392 Base = N.getOperand(0);
1394 Disp = DAG.getTargetConstant(imm, N.getValueType());
1398 } else if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(N)) {
1399 // Loading from a constant address.
1401 // If this address fits entirely in a 16-bit sext immediate field, codegen
1404 if (isIntS16Immediate(CN, Imm) && (!Aligned || (Imm & 3) == 0)) {
1405 Disp = DAG.getTargetConstant(Imm, CN->getValueType(0));
1406 Base = DAG.getRegister(Subtarget.isPPC64() ? PPC::ZERO8 : PPC::ZERO,
1407 CN->getValueType(0));
1411 // Handle 32-bit sext immediates with LIS + addr mode.
1412 if ((CN->getValueType(0) == MVT::i32 ||
1413 (int64_t)CN->getZExtValue() == (int)CN->getZExtValue()) &&
1414 (!Aligned || (CN->getZExtValue() & 3) == 0)) {
1415 int Addr = (int)CN->getZExtValue();
1417 // Otherwise, break this down into an LIS + disp.
1418 Disp = DAG.getTargetConstant((short)Addr, MVT::i32);
1420 Base = DAG.getTargetConstant((Addr - (signed short)Addr) >> 16, MVT::i32);
1421 unsigned Opc = CN->getValueType(0) == MVT::i32 ? PPC::LIS : PPC::LIS8;
1422 Base = SDValue(DAG.getMachineNode(Opc, dl, CN->getValueType(0), Base), 0);
1427 Disp = DAG.getTargetConstant(0, getPointerTy());
1428 if (FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(N)) {
1429 Base = DAG.getTargetFrameIndex(FI->getIndex(), N.getValueType());
1430 fixupFuncForFI(DAG, FI->getIndex(), N.getValueType());
1433 return true; // [r+0]
1436 /// SelectAddressRegRegOnly - Given the specified addressed, force it to be
1437 /// represented as an indexed [r+r] operation.
1438 bool PPCTargetLowering::SelectAddressRegRegOnly(SDValue N, SDValue &Base,
1440 SelectionDAG &DAG) const {
1441 // Check to see if we can easily represent this as an [r+r] address. This
1442 // will fail if it thinks that the address is more profitably represented as
1443 // reg+imm, e.g. where imm = 0.
1444 if (SelectAddressRegReg(N, Base, Index, DAG))
1447 // If the operand is an addition, always emit this as [r+r], since this is
1448 // better (for code size, and execution, as the memop does the add for free)
1449 // than emitting an explicit add.
1450 if (N.getOpcode() == ISD::ADD) {
1451 Base = N.getOperand(0);
1452 Index = N.getOperand(1);
1456 // Otherwise, do it the hard way, using R0 as the base register.
1457 Base = DAG.getRegister(Subtarget.isPPC64() ? PPC::ZERO8 : PPC::ZERO,
1463 /// getPreIndexedAddressParts - returns true by value, base pointer and
1464 /// offset pointer and addressing mode by reference if the node's address
1465 /// can be legally represented as pre-indexed load / store address.
1466 bool PPCTargetLowering::getPreIndexedAddressParts(SDNode *N, SDValue &Base,
1468 ISD::MemIndexedMode &AM,
1469 SelectionDAG &DAG) const {
1470 if (DisablePPCPreinc) return false;
1476 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) {
1477 Ptr = LD->getBasePtr();
1478 VT = LD->getMemoryVT();
1479 Alignment = LD->getAlignment();
1480 } else if (StoreSDNode *ST = dyn_cast<StoreSDNode>(N)) {
1481 Ptr = ST->getBasePtr();
1482 VT = ST->getMemoryVT();
1483 Alignment = ST->getAlignment();
1488 // PowerPC doesn't have preinc load/store instructions for vectors.
1492 if (SelectAddressRegReg(Ptr, Base, Offset, DAG)) {
1494 // Common code will reject creating a pre-inc form if the base pointer
1495 // is a frame index, or if N is a store and the base pointer is either
1496 // the same as or a predecessor of the value being stored. Check for
1497 // those situations here, and try with swapped Base/Offset instead.
1500 if (isa<FrameIndexSDNode>(Base) || isa<RegisterSDNode>(Base))
1503 SDValue Val = cast<StoreSDNode>(N)->getValue();
1504 if (Val == Base || Base.getNode()->isPredecessorOf(Val.getNode()))
1509 std::swap(Base, Offset);
1515 // LDU/STU can only handle immediates that are a multiple of 4.
1516 if (VT != MVT::i64) {
1517 if (!SelectAddressRegImm(Ptr, Offset, Base, DAG, false))
1520 // LDU/STU need an address with at least 4-byte alignment.
1524 if (!SelectAddressRegImm(Ptr, Offset, Base, DAG, true))
1528 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) {
1529 // PPC64 doesn't have lwau, but it does have lwaux. Reject preinc load of
1530 // sext i32 to i64 when addr mode is r+i.
1531 if (LD->getValueType(0) == MVT::i64 && LD->getMemoryVT() == MVT::i32 &&
1532 LD->getExtensionType() == ISD::SEXTLOAD &&
1533 isa<ConstantSDNode>(Offset))
1541 //===----------------------------------------------------------------------===//
1542 // LowerOperation implementation
1543 //===----------------------------------------------------------------------===//
1545 /// GetLabelAccessInfo - Return true if we should reference labels using a
1546 /// PICBase, set the HiOpFlags and LoOpFlags to the target MO flags.
1547 static bool GetLabelAccessInfo(const TargetMachine &TM, unsigned &HiOpFlags,
1548 unsigned &LoOpFlags,
1549 const GlobalValue *GV = nullptr) {
1550 HiOpFlags = PPCII::MO_HA;
1551 LoOpFlags = PPCII::MO_LO;
1553 // Don't use the pic base if not in PIC relocation model.
1554 bool isPIC = TM.getRelocationModel() == Reloc::PIC_;
1557 HiOpFlags |= PPCII::MO_PIC_FLAG;
1558 LoOpFlags |= PPCII::MO_PIC_FLAG;
1561 // If this is a reference to a global value that requires a non-lazy-ptr, make
1562 // sure that instruction lowering adds it.
1563 if (GV && TM.getSubtarget<PPCSubtarget>().hasLazyResolverStub(GV, TM)) {
1564 HiOpFlags |= PPCII::MO_NLP_FLAG;
1565 LoOpFlags |= PPCII::MO_NLP_FLAG;
1567 if (GV->hasHiddenVisibility()) {
1568 HiOpFlags |= PPCII::MO_NLP_HIDDEN_FLAG;
1569 LoOpFlags |= PPCII::MO_NLP_HIDDEN_FLAG;
1576 static SDValue LowerLabelRef(SDValue HiPart, SDValue LoPart, bool isPIC,
1577 SelectionDAG &DAG) {
1578 EVT PtrVT = HiPart.getValueType();
1579 SDValue Zero = DAG.getConstant(0, PtrVT);
1582 SDValue Hi = DAG.getNode(PPCISD::Hi, DL, PtrVT, HiPart, Zero);
1583 SDValue Lo = DAG.getNode(PPCISD::Lo, DL, PtrVT, LoPart, Zero);
1585 // With PIC, the first instruction is actually "GR+hi(&G)".
1587 Hi = DAG.getNode(ISD::ADD, DL, PtrVT,
1588 DAG.getNode(PPCISD::GlobalBaseReg, DL, PtrVT), Hi);
1590 // Generate non-pic code that has direct accesses to the constant pool.
1591 // The address of the global is just (hi(&g)+lo(&g)).
1592 return DAG.getNode(ISD::ADD, DL, PtrVT, Hi, Lo);
1595 SDValue PPCTargetLowering::LowerConstantPool(SDValue Op,
1596 SelectionDAG &DAG) const {
1597 EVT PtrVT = Op.getValueType();
1598 ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
1599 const Constant *C = CP->getConstVal();
1601 // 64-bit SVR4 ABI code is always position-independent.
1602 // The actual address of the GlobalValue is stored in the TOC.
1603 if (Subtarget.isSVR4ABI() && Subtarget.isPPC64()) {
1604 SDValue GA = DAG.getTargetConstantPool(C, PtrVT, CP->getAlignment(), 0);
1605 return DAG.getNode(PPCISD::TOC_ENTRY, SDLoc(CP), MVT::i64, GA,
1606 DAG.getRegister(PPC::X2, MVT::i64));
1609 unsigned MOHiFlag, MOLoFlag;
1610 bool isPIC = GetLabelAccessInfo(DAG.getTarget(), MOHiFlag, MOLoFlag);
1612 if (isPIC && Subtarget.isSVR4ABI()) {
1613 SDValue GA = DAG.getTargetConstantPool(C, PtrVT, CP->getAlignment(),
1614 PPCII::MO_PIC_FLAG);
1616 return DAG.getNode(PPCISD::TOC_ENTRY, DL, MVT::i32, GA,
1617 DAG.getNode(PPCISD::GlobalBaseReg, DL, PtrVT));
1621 DAG.getTargetConstantPool(C, PtrVT, CP->getAlignment(), 0, MOHiFlag);
1623 DAG.getTargetConstantPool(C, PtrVT, CP->getAlignment(), 0, MOLoFlag);
1624 return LowerLabelRef(CPIHi, CPILo, isPIC, DAG);
1627 SDValue PPCTargetLowering::LowerJumpTable(SDValue Op, SelectionDAG &DAG) const {
1628 EVT PtrVT = Op.getValueType();
1629 JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
1631 // 64-bit SVR4 ABI code is always position-independent.
1632 // The actual address of the GlobalValue is stored in the TOC.
1633 if (Subtarget.isSVR4ABI() && Subtarget.isPPC64()) {
1634 SDValue GA = DAG.getTargetJumpTable(JT->getIndex(), PtrVT);
1635 return DAG.getNode(PPCISD::TOC_ENTRY, SDLoc(JT), MVT::i64, GA,
1636 DAG.getRegister(PPC::X2, MVT::i64));
1639 unsigned MOHiFlag, MOLoFlag;
1640 bool isPIC = GetLabelAccessInfo(DAG.getTarget(), MOHiFlag, MOLoFlag);
1642 if (isPIC && Subtarget.isSVR4ABI()) {
1643 SDValue GA = DAG.getTargetJumpTable(JT->getIndex(), PtrVT,
1644 PPCII::MO_PIC_FLAG);
1646 return DAG.getNode(PPCISD::TOC_ENTRY, SDLoc(JT), PtrVT, GA,
1647 DAG.getNode(PPCISD::GlobalBaseReg, DL, PtrVT));
1650 SDValue JTIHi = DAG.getTargetJumpTable(JT->getIndex(), PtrVT, MOHiFlag);
1651 SDValue JTILo = DAG.getTargetJumpTable(JT->getIndex(), PtrVT, MOLoFlag);
1652 return LowerLabelRef(JTIHi, JTILo, isPIC, DAG);
1655 SDValue PPCTargetLowering::LowerBlockAddress(SDValue Op,
1656 SelectionDAG &DAG) const {
1657 EVT PtrVT = Op.getValueType();
1658 BlockAddressSDNode *BASDN = cast<BlockAddressSDNode>(Op);
1659 const BlockAddress *BA = BASDN->getBlockAddress();
1661 // 64-bit SVR4 ABI code is always position-independent.
1662 // The actual BlockAddress is stored in the TOC.
1663 if (Subtarget.isSVR4ABI() && Subtarget.isPPC64()) {
1664 SDValue GA = DAG.getTargetBlockAddress(BA, PtrVT, BASDN->getOffset());
1665 return DAG.getNode(PPCISD::TOC_ENTRY, SDLoc(BASDN), MVT::i64, GA,
1666 DAG.getRegister(PPC::X2, MVT::i64));
1669 unsigned MOHiFlag, MOLoFlag;
1670 bool isPIC = GetLabelAccessInfo(DAG.getTarget(), MOHiFlag, MOLoFlag);
1671 SDValue TgtBAHi = DAG.getTargetBlockAddress(BA, PtrVT, 0, MOHiFlag);
1672 SDValue TgtBALo = DAG.getTargetBlockAddress(BA, PtrVT, 0, MOLoFlag);
1673 return LowerLabelRef(TgtBAHi, TgtBALo, isPIC, DAG);
1676 // Generate a call to __tls_get_addr for the given GOT entry Op.
1677 std::pair<SDValue,SDValue>
1678 PPCTargetLowering::lowerTLSCall(SDValue Op, SDLoc dl,
1679 SelectionDAG &DAG) const {
1681 Type *IntPtrTy = getDataLayout()->getIntPtrType(*DAG.getContext());
1682 TargetLowering::ArgListTy Args;
1683 TargetLowering::ArgListEntry Entry;
1685 Entry.Ty = IntPtrTy;
1686 Args.push_back(Entry);
1688 TargetLowering::CallLoweringInfo CLI(DAG);
1689 CLI.setDebugLoc(dl).setChain(DAG.getEntryNode())
1690 .setCallee(CallingConv::C, IntPtrTy,
1691 DAG.getTargetExternalSymbol("__tls_get_addr", getPointerTy()),
1692 std::move(Args), 0);
1694 return LowerCallTo(CLI);
1697 SDValue PPCTargetLowering::LowerGlobalTLSAddress(SDValue Op,
1698 SelectionDAG &DAG) const {
1700 // FIXME: TLS addresses currently use medium model code sequences,
1701 // which is the most useful form. Eventually support for small and
1702 // large models could be added if users need it, at the cost of
1703 // additional complexity.
1704 GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op);
1706 const GlobalValue *GV = GA->getGlobal();
1707 EVT PtrVT = getPointerTy();
1708 bool is64bit = Subtarget.isPPC64();
1709 const Module *M = DAG.getMachineFunction().getFunction()->getParent();
1710 PICLevel::Level picLevel = M->getPICLevel();
1712 TLSModel::Model Model = getTargetMachine().getTLSModel(GV);
1714 if (Model == TLSModel::LocalExec) {
1715 SDValue TGAHi = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0,
1716 PPCII::MO_TPREL_HA);
1717 SDValue TGALo = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0,
1718 PPCII::MO_TPREL_LO);
1719 SDValue TLSReg = DAG.getRegister(is64bit ? PPC::X13 : PPC::R2,
1720 is64bit ? MVT::i64 : MVT::i32);
1721 SDValue Hi = DAG.getNode(PPCISD::Hi, dl, PtrVT, TGAHi, TLSReg);
1722 return DAG.getNode(PPCISD::Lo, dl, PtrVT, TGALo, Hi);
1725 if (Model == TLSModel::InitialExec) {
1726 SDValue TGA = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0, 0);
1727 SDValue TGATLS = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0,
1731 SDValue GOTReg = DAG.getRegister(PPC::X2, MVT::i64);
1732 GOTPtr = DAG.getNode(PPCISD::ADDIS_GOT_TPREL_HA, dl,
1733 PtrVT, GOTReg, TGA);
1735 GOTPtr = DAG.getNode(PPCISD::PPC32_GOT, dl, PtrVT);
1736 SDValue TPOffset = DAG.getNode(PPCISD::LD_GOT_TPREL_L, dl,
1737 PtrVT, TGA, GOTPtr);
1738 return DAG.getNode(PPCISD::ADD_TLS, dl, PtrVT, TPOffset, TGATLS);
1741 if (Model == TLSModel::GeneralDynamic) {
1742 SDValue TGA = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0,
1746 SDValue GOTReg = DAG.getRegister(PPC::X2, MVT::i64);
1747 GOTPtr = DAG.getNode(PPCISD::ADDIS_TLSGD_HA, dl, PtrVT,
1750 if (picLevel == PICLevel::Small)
1751 GOTPtr = DAG.getNode(PPCISD::GlobalBaseReg, dl, PtrVT);
1753 GOTPtr = DAG.getNode(PPCISD::PPC32_PICGOT, dl, PtrVT);
1755 SDValue GOTEntry = DAG.getNode(PPCISD::ADDI_TLSGD_L, dl, PtrVT,
1757 std::pair<SDValue, SDValue> CallResult = lowerTLSCall(GOTEntry, dl, DAG);
1758 return CallResult.first;
1761 if (Model == TLSModel::LocalDynamic) {
1762 SDValue TGA = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0,
1766 SDValue GOTReg = DAG.getRegister(PPC::X2, MVT::i64);
1767 GOTPtr = DAG.getNode(PPCISD::ADDIS_TLSLD_HA, dl, PtrVT,
1770 if (picLevel == PICLevel::Small)
1771 GOTPtr = DAG.getNode(PPCISD::GlobalBaseReg, dl, PtrVT);
1773 GOTPtr = DAG.getNode(PPCISD::PPC32_PICGOT, dl, PtrVT);
1775 SDValue GOTEntry = DAG.getNode(PPCISD::ADDI_TLSLD_L, dl, PtrVT,
1777 std::pair<SDValue, SDValue> CallResult = lowerTLSCall(GOTEntry, dl, DAG);
1778 SDValue TLSAddr = CallResult.first;
1779 SDValue Chain = CallResult.second;
1780 SDValue DtvOffsetHi = DAG.getNode(PPCISD::ADDIS_DTPREL_HA, dl, PtrVT,
1781 Chain, TLSAddr, TGA);
1782 return DAG.getNode(PPCISD::ADDI_DTPREL_L, dl, PtrVT, DtvOffsetHi, TGA);
1785 llvm_unreachable("Unknown TLS model!");
1788 SDValue PPCTargetLowering::LowerGlobalAddress(SDValue Op,
1789 SelectionDAG &DAG) const {
1790 EVT PtrVT = Op.getValueType();
1791 GlobalAddressSDNode *GSDN = cast<GlobalAddressSDNode>(Op);
1793 const GlobalValue *GV = GSDN->getGlobal();
1795 // 64-bit SVR4 ABI code is always position-independent.
1796 // The actual address of the GlobalValue is stored in the TOC.
1797 if (Subtarget.isSVR4ABI() && Subtarget.isPPC64()) {
1798 SDValue GA = DAG.getTargetGlobalAddress(GV, DL, PtrVT, GSDN->getOffset());
1799 return DAG.getNode(PPCISD::TOC_ENTRY, DL, MVT::i64, GA,
1800 DAG.getRegister(PPC::X2, MVT::i64));
1803 unsigned MOHiFlag, MOLoFlag;
1804 bool isPIC = GetLabelAccessInfo(DAG.getTarget(), MOHiFlag, MOLoFlag, GV);
1806 if (isPIC && Subtarget.isSVR4ABI()) {
1807 SDValue GA = DAG.getTargetGlobalAddress(GV, DL, PtrVT,
1809 PPCII::MO_PIC_FLAG);
1810 return DAG.getNode(PPCISD::TOC_ENTRY, DL, MVT::i32, GA,
1811 DAG.getNode(PPCISD::GlobalBaseReg, DL, MVT::i32));
1815 DAG.getTargetGlobalAddress(GV, DL, PtrVT, GSDN->getOffset(), MOHiFlag);
1817 DAG.getTargetGlobalAddress(GV, DL, PtrVT, GSDN->getOffset(), MOLoFlag);
1819 SDValue Ptr = LowerLabelRef(GAHi, GALo, isPIC, DAG);
1821 // If the global reference is actually to a non-lazy-pointer, we have to do an
1822 // extra load to get the address of the global.
1823 if (MOHiFlag & PPCII::MO_NLP_FLAG)
1824 Ptr = DAG.getLoad(PtrVT, DL, DAG.getEntryNode(), Ptr, MachinePointerInfo(),
1825 false, false, false, 0);
1829 SDValue PPCTargetLowering::LowerSETCC(SDValue Op, SelectionDAG &DAG) const {
1830 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(2))->get();
1833 if (Op.getValueType() == MVT::v2i64) {
1834 // When the operands themselves are v2i64 values, we need to do something
1835 // special because VSX has no underlying comparison operations for these.
1836 if (Op.getOperand(0).getValueType() == MVT::v2i64) {
1837 // Equality can be handled by casting to the legal type for Altivec
1838 // comparisons, everything else needs to be expanded.
1839 if (CC == ISD::SETEQ || CC == ISD::SETNE) {
1840 return DAG.getNode(ISD::BITCAST, dl, MVT::v2i64,
1841 DAG.getSetCC(dl, MVT::v4i32,
1842 DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, Op.getOperand(0)),
1843 DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, Op.getOperand(1)),
1850 // We handle most of these in the usual way.
1854 // If we're comparing for equality to zero, expose the fact that this is
1855 // implented as a ctlz/srl pair on ppc, so that the dag combiner can
1856 // fold the new nodes.
1857 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(1))) {
1858 if (C->isNullValue() && CC == ISD::SETEQ) {
1859 EVT VT = Op.getOperand(0).getValueType();
1860 SDValue Zext = Op.getOperand(0);
1861 if (VT.bitsLT(MVT::i32)) {
1863 Zext = DAG.getNode(ISD::ZERO_EXTEND, dl, VT, Op.getOperand(0));
1865 unsigned Log2b = Log2_32(VT.getSizeInBits());
1866 SDValue Clz = DAG.getNode(ISD::CTLZ, dl, VT, Zext);
1867 SDValue Scc = DAG.getNode(ISD::SRL, dl, VT, Clz,
1868 DAG.getConstant(Log2b, MVT::i32));
1869 return DAG.getNode(ISD::TRUNCATE, dl, MVT::i32, Scc);
1871 // Leave comparisons against 0 and -1 alone for now, since they're usually
1872 // optimized. FIXME: revisit this when we can custom lower all setcc
1874 if (C->isAllOnesValue() || C->isNullValue())
1878 // If we have an integer seteq/setne, turn it into a compare against zero
1879 // by xor'ing the rhs with the lhs, which is faster than setting a
1880 // condition register, reading it back out, and masking the correct bit. The
1881 // normal approach here uses sub to do this instead of xor. Using xor exposes
1882 // the result to other bit-twiddling opportunities.
1883 EVT LHSVT = Op.getOperand(0).getValueType();
1884 if (LHSVT.isInteger() && (CC == ISD::SETEQ || CC == ISD::SETNE)) {
1885 EVT VT = Op.getValueType();
1886 SDValue Sub = DAG.getNode(ISD::XOR, dl, LHSVT, Op.getOperand(0),
1888 return DAG.getSetCC(dl, VT, Sub, DAG.getConstant(0, LHSVT), CC);
1893 SDValue PPCTargetLowering::LowerVAARG(SDValue Op, SelectionDAG &DAG,
1894 const PPCSubtarget &Subtarget) const {
1895 SDNode *Node = Op.getNode();
1896 EVT VT = Node->getValueType(0);
1897 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
1898 SDValue InChain = Node->getOperand(0);
1899 SDValue VAListPtr = Node->getOperand(1);
1900 const Value *SV = cast<SrcValueSDNode>(Node->getOperand(2))->getValue();
1903 assert(!Subtarget.isPPC64() && "LowerVAARG is PPC32 only");
1906 SDValue GprIndex = DAG.getExtLoad(ISD::ZEXTLOAD, dl, MVT::i32, InChain,
1907 VAListPtr, MachinePointerInfo(SV), MVT::i8,
1908 false, false, false, 0);
1909 InChain = GprIndex.getValue(1);
1911 if (VT == MVT::i64) {
1912 // Check if GprIndex is even
1913 SDValue GprAnd = DAG.getNode(ISD::AND, dl, MVT::i32, GprIndex,
1914 DAG.getConstant(1, MVT::i32));
1915 SDValue CC64 = DAG.getSetCC(dl, MVT::i32, GprAnd,
1916 DAG.getConstant(0, MVT::i32), ISD::SETNE);
1917 SDValue GprIndexPlusOne = DAG.getNode(ISD::ADD, dl, MVT::i32, GprIndex,
1918 DAG.getConstant(1, MVT::i32));
1919 // Align GprIndex to be even if it isn't
1920 GprIndex = DAG.getNode(ISD::SELECT, dl, MVT::i32, CC64, GprIndexPlusOne,
1924 // fpr index is 1 byte after gpr
1925 SDValue FprPtr = DAG.getNode(ISD::ADD, dl, PtrVT, VAListPtr,
1926 DAG.getConstant(1, MVT::i32));
1929 SDValue FprIndex = DAG.getExtLoad(ISD::ZEXTLOAD, dl, MVT::i32, InChain,
1930 FprPtr, MachinePointerInfo(SV), MVT::i8,
1931 false, false, false, 0);
1932 InChain = FprIndex.getValue(1);
1934 SDValue RegSaveAreaPtr = DAG.getNode(ISD::ADD, dl, PtrVT, VAListPtr,
1935 DAG.getConstant(8, MVT::i32));
1937 SDValue OverflowAreaPtr = DAG.getNode(ISD::ADD, dl, PtrVT, VAListPtr,
1938 DAG.getConstant(4, MVT::i32));
1941 SDValue OverflowArea = DAG.getLoad(MVT::i32, dl, InChain, OverflowAreaPtr,
1942 MachinePointerInfo(), false, false,
1944 InChain = OverflowArea.getValue(1);
1946 SDValue RegSaveArea = DAG.getLoad(MVT::i32, dl, InChain, RegSaveAreaPtr,
1947 MachinePointerInfo(), false, false,
1949 InChain = RegSaveArea.getValue(1);
1951 // select overflow_area if index > 8
1952 SDValue CC = DAG.getSetCC(dl, MVT::i32, VT.isInteger() ? GprIndex : FprIndex,
1953 DAG.getConstant(8, MVT::i32), ISD::SETLT);
1955 // adjustment constant gpr_index * 4/8
1956 SDValue RegConstant = DAG.getNode(ISD::MUL, dl, MVT::i32,
1957 VT.isInteger() ? GprIndex : FprIndex,
1958 DAG.getConstant(VT.isInteger() ? 4 : 8,
1961 // OurReg = RegSaveArea + RegConstant
1962 SDValue OurReg = DAG.getNode(ISD::ADD, dl, PtrVT, RegSaveArea,
1965 // Floating types are 32 bytes into RegSaveArea
1966 if (VT.isFloatingPoint())
1967 OurReg = DAG.getNode(ISD::ADD, dl, PtrVT, OurReg,
1968 DAG.getConstant(32, MVT::i32));
1970 // increase {f,g}pr_index by 1 (or 2 if VT is i64)
1971 SDValue IndexPlus1 = DAG.getNode(ISD::ADD, dl, MVT::i32,
1972 VT.isInteger() ? GprIndex : FprIndex,
1973 DAG.getConstant(VT == MVT::i64 ? 2 : 1,
1976 InChain = DAG.getTruncStore(InChain, dl, IndexPlus1,
1977 VT.isInteger() ? VAListPtr : FprPtr,
1978 MachinePointerInfo(SV),
1979 MVT::i8, false, false, 0);
1981 // determine if we should load from reg_save_area or overflow_area
1982 SDValue Result = DAG.getNode(ISD::SELECT, dl, PtrVT, CC, OurReg, OverflowArea);
1984 // increase overflow_area by 4/8 if gpr/fpr > 8
1985 SDValue OverflowAreaPlusN = DAG.getNode(ISD::ADD, dl, PtrVT, OverflowArea,
1986 DAG.getConstant(VT.isInteger() ? 4 : 8,
1989 OverflowArea = DAG.getNode(ISD::SELECT, dl, MVT::i32, CC, OverflowArea,
1992 InChain = DAG.getTruncStore(InChain, dl, OverflowArea,
1994 MachinePointerInfo(),
1995 MVT::i32, false, false, 0);
1997 return DAG.getLoad(VT, dl, InChain, Result, MachinePointerInfo(),
1998 false, false, false, 0);
2001 SDValue PPCTargetLowering::LowerVACOPY(SDValue Op, SelectionDAG &DAG,
2002 const PPCSubtarget &Subtarget) const {
2003 assert(!Subtarget.isPPC64() && "LowerVACOPY is PPC32 only");
2005 // We have to copy the entire va_list struct:
2006 // 2*sizeof(char) + 2 Byte alignment + 2*sizeof(char*) = 12 Byte
2007 return DAG.getMemcpy(Op.getOperand(0), Op,
2008 Op.getOperand(1), Op.getOperand(2),
2009 DAG.getConstant(12, MVT::i32), 8, false, true,
2010 MachinePointerInfo(), MachinePointerInfo());
2013 SDValue PPCTargetLowering::LowerADJUST_TRAMPOLINE(SDValue Op,
2014 SelectionDAG &DAG) const {
2015 return Op.getOperand(0);
2018 SDValue PPCTargetLowering::LowerINIT_TRAMPOLINE(SDValue Op,
2019 SelectionDAG &DAG) const {
2020 SDValue Chain = Op.getOperand(0);
2021 SDValue Trmp = Op.getOperand(1); // trampoline
2022 SDValue FPtr = Op.getOperand(2); // nested function
2023 SDValue Nest = Op.getOperand(3); // 'nest' parameter value
2026 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
2027 bool isPPC64 = (PtrVT == MVT::i64);
2029 DAG.getTargetLoweringInfo().getDataLayout()->getIntPtrType(
2032 TargetLowering::ArgListTy Args;
2033 TargetLowering::ArgListEntry Entry;
2035 Entry.Ty = IntPtrTy;
2036 Entry.Node = Trmp; Args.push_back(Entry);
2038 // TrampSize == (isPPC64 ? 48 : 40);
2039 Entry.Node = DAG.getConstant(isPPC64 ? 48 : 40,
2040 isPPC64 ? MVT::i64 : MVT::i32);
2041 Args.push_back(Entry);
2043 Entry.Node = FPtr; Args.push_back(Entry);
2044 Entry.Node = Nest; Args.push_back(Entry);
2046 // Lower to a call to __trampoline_setup(Trmp, TrampSize, FPtr, ctx_reg)
2047 TargetLowering::CallLoweringInfo CLI(DAG);
2048 CLI.setDebugLoc(dl).setChain(Chain)
2049 .setCallee(CallingConv::C, Type::getVoidTy(*DAG.getContext()),
2050 DAG.getExternalSymbol("__trampoline_setup", PtrVT),
2051 std::move(Args), 0);
2053 std::pair<SDValue, SDValue> CallResult = LowerCallTo(CLI);
2054 return CallResult.second;
2057 SDValue PPCTargetLowering::LowerVASTART(SDValue Op, SelectionDAG &DAG,
2058 const PPCSubtarget &Subtarget) const {
2059 MachineFunction &MF = DAG.getMachineFunction();
2060 PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>();
2064 if (Subtarget.isDarwinABI() || Subtarget.isPPC64()) {
2065 // vastart just stores the address of the VarArgsFrameIndex slot into the
2066 // memory location argument.
2067 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
2068 SDValue FR = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(), PtrVT);
2069 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
2070 return DAG.getStore(Op.getOperand(0), dl, FR, Op.getOperand(1),
2071 MachinePointerInfo(SV),
2075 // For the 32-bit SVR4 ABI we follow the layout of the va_list struct.
2076 // We suppose the given va_list is already allocated.
2079 // char gpr; /* index into the array of 8 GPRs
2080 // * stored in the register save area
2081 // * gpr=0 corresponds to r3,
2082 // * gpr=1 to r4, etc.
2084 // char fpr; /* index into the array of 8 FPRs
2085 // * stored in the register save area
2086 // * fpr=0 corresponds to f1,
2087 // * fpr=1 to f2, etc.
2089 // char *overflow_arg_area;
2090 // /* location on stack that holds
2091 // * the next overflow argument
2093 // char *reg_save_area;
2094 // /* where r3:r10 and f1:f8 (if saved)
2100 SDValue ArgGPR = DAG.getConstant(FuncInfo->getVarArgsNumGPR(), MVT::i32);
2101 SDValue ArgFPR = DAG.getConstant(FuncInfo->getVarArgsNumFPR(), MVT::i32);
2104 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
2106 SDValue StackOffsetFI = DAG.getFrameIndex(FuncInfo->getVarArgsStackOffset(),
2108 SDValue FR = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(),
2111 uint64_t FrameOffset = PtrVT.getSizeInBits()/8;
2112 SDValue ConstFrameOffset = DAG.getConstant(FrameOffset, PtrVT);
2114 uint64_t StackOffset = PtrVT.getSizeInBits()/8 - 1;
2115 SDValue ConstStackOffset = DAG.getConstant(StackOffset, PtrVT);
2117 uint64_t FPROffset = 1;
2118 SDValue ConstFPROffset = DAG.getConstant(FPROffset, PtrVT);
2120 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
2122 // Store first byte : number of int regs
2123 SDValue firstStore = DAG.getTruncStore(Op.getOperand(0), dl, ArgGPR,
2125 MachinePointerInfo(SV),
2126 MVT::i8, false, false, 0);
2127 uint64_t nextOffset = FPROffset;
2128 SDValue nextPtr = DAG.getNode(ISD::ADD, dl, PtrVT, Op.getOperand(1),
2131 // Store second byte : number of float regs
2132 SDValue secondStore =
2133 DAG.getTruncStore(firstStore, dl, ArgFPR, nextPtr,
2134 MachinePointerInfo(SV, nextOffset), MVT::i8,
2136 nextOffset += StackOffset;
2137 nextPtr = DAG.getNode(ISD::ADD, dl, PtrVT, nextPtr, ConstStackOffset);
2139 // Store second word : arguments given on stack
2140 SDValue thirdStore =
2141 DAG.getStore(secondStore, dl, StackOffsetFI, nextPtr,
2142 MachinePointerInfo(SV, nextOffset),
2144 nextOffset += FrameOffset;
2145 nextPtr = DAG.getNode(ISD::ADD, dl, PtrVT, nextPtr, ConstFrameOffset);
2147 // Store third word : arguments given in registers
2148 return DAG.getStore(thirdStore, dl, FR, nextPtr,
2149 MachinePointerInfo(SV, nextOffset),
2154 #include "PPCGenCallingConv.inc"
2156 // Function whose sole purpose is to kill compiler warnings
2157 // stemming from unused functions included from PPCGenCallingConv.inc.
2158 CCAssignFn *PPCTargetLowering::useFastISelCCs(unsigned Flag) const {
2159 return Flag ? CC_PPC64_ELF_FIS : RetCC_PPC64_ELF_FIS;
2162 bool llvm::CC_PPC32_SVR4_Custom_Dummy(unsigned &ValNo, MVT &ValVT, MVT &LocVT,
2163 CCValAssign::LocInfo &LocInfo,
2164 ISD::ArgFlagsTy &ArgFlags,
2169 bool llvm::CC_PPC32_SVR4_Custom_AlignArgRegs(unsigned &ValNo, MVT &ValVT,
2171 CCValAssign::LocInfo &LocInfo,
2172 ISD::ArgFlagsTy &ArgFlags,
2174 static const MCPhysReg ArgRegs[] = {
2175 PPC::R3, PPC::R4, PPC::R5, PPC::R6,
2176 PPC::R7, PPC::R8, PPC::R9, PPC::R10,
2178 const unsigned NumArgRegs = array_lengthof(ArgRegs);
2180 unsigned RegNum = State.getFirstUnallocated(ArgRegs, NumArgRegs);
2182 // Skip one register if the first unallocated register has an even register
2183 // number and there are still argument registers available which have not been
2184 // allocated yet. RegNum is actually an index into ArgRegs, which means we
2185 // need to skip a register if RegNum is odd.
2186 if (RegNum != NumArgRegs && RegNum % 2 == 1) {
2187 State.AllocateReg(ArgRegs[RegNum]);
2190 // Always return false here, as this function only makes sure that the first
2191 // unallocated register has an odd register number and does not actually
2192 // allocate a register for the current argument.
2196 bool llvm::CC_PPC32_SVR4_Custom_AlignFPArgRegs(unsigned &ValNo, MVT &ValVT,
2198 CCValAssign::LocInfo &LocInfo,
2199 ISD::ArgFlagsTy &ArgFlags,
2201 static const MCPhysReg ArgRegs[] = {
2202 PPC::F1, PPC::F2, PPC::F3, PPC::F4, PPC::F5, PPC::F6, PPC::F7,
2206 const unsigned NumArgRegs = array_lengthof(ArgRegs);
2208 unsigned RegNum = State.getFirstUnallocated(ArgRegs, NumArgRegs);
2210 // If there is only one Floating-point register left we need to put both f64
2211 // values of a split ppc_fp128 value on the stack.
2212 if (RegNum != NumArgRegs && ArgRegs[RegNum] == PPC::F8) {
2213 State.AllocateReg(ArgRegs[RegNum]);
2216 // Always return false here, as this function only makes sure that the two f64
2217 // values a ppc_fp128 value is split into are both passed in registers or both
2218 // passed on the stack and does not actually allocate a register for the
2219 // current argument.
2223 /// GetFPR - Get the set of FP registers that should be allocated for arguments,
2225 static const MCPhysReg *GetFPR() {
2226 static const MCPhysReg FPR[] = {
2227 PPC::F1, PPC::F2, PPC::F3, PPC::F4, PPC::F5, PPC::F6, PPC::F7,
2228 PPC::F8, PPC::F9, PPC::F10, PPC::F11, PPC::F12, PPC::F13
2234 /// CalculateStackSlotSize - Calculates the size reserved for this argument on
2236 static unsigned CalculateStackSlotSize(EVT ArgVT, ISD::ArgFlagsTy Flags,
2237 unsigned PtrByteSize) {
2238 unsigned ArgSize = ArgVT.getStoreSize();
2239 if (Flags.isByVal())
2240 ArgSize = Flags.getByValSize();
2242 // Round up to multiples of the pointer size, except for array members,
2243 // which are always packed.
2244 if (!Flags.isInConsecutiveRegs())
2245 ArgSize = ((ArgSize + PtrByteSize - 1)/PtrByteSize) * PtrByteSize;
2250 /// CalculateStackSlotAlignment - Calculates the alignment of this argument
2252 static unsigned CalculateStackSlotAlignment(EVT ArgVT, EVT OrigVT,
2253 ISD::ArgFlagsTy Flags,
2254 unsigned PtrByteSize) {
2255 unsigned Align = PtrByteSize;
2257 // Altivec parameters are padded to a 16 byte boundary.
2258 if (ArgVT == MVT::v4f32 || ArgVT == MVT::v4i32 ||
2259 ArgVT == MVT::v8i16 || ArgVT == MVT::v16i8 ||
2260 ArgVT == MVT::v2f64 || ArgVT == MVT::v2i64)
2263 // ByVal parameters are aligned as requested.
2264 if (Flags.isByVal()) {
2265 unsigned BVAlign = Flags.getByValAlign();
2266 if (BVAlign > PtrByteSize) {
2267 if (BVAlign % PtrByteSize != 0)
2269 "ByVal alignment is not a multiple of the pointer size");
2275 // Array members are always packed to their original alignment.
2276 if (Flags.isInConsecutiveRegs()) {
2277 // If the array member was split into multiple registers, the first
2278 // needs to be aligned to the size of the full type. (Except for
2279 // ppcf128, which is only aligned as its f64 components.)
2280 if (Flags.isSplit() && OrigVT != MVT::ppcf128)
2281 Align = OrigVT.getStoreSize();
2283 Align = ArgVT.getStoreSize();
2289 /// CalculateStackSlotUsed - Return whether this argument will use its
2290 /// stack slot (instead of being passed in registers). ArgOffset,
2291 /// AvailableFPRs, and AvailableVRs must hold the current argument
2292 /// position, and will be updated to account for this argument.
2293 static bool CalculateStackSlotUsed(EVT ArgVT, EVT OrigVT,
2294 ISD::ArgFlagsTy Flags,
2295 unsigned PtrByteSize,
2296 unsigned LinkageSize,
2297 unsigned ParamAreaSize,
2298 unsigned &ArgOffset,
2299 unsigned &AvailableFPRs,
2300 unsigned &AvailableVRs) {
2301 bool UseMemory = false;
2303 // Respect alignment of argument on the stack.
2305 CalculateStackSlotAlignment(ArgVT, OrigVT, Flags, PtrByteSize);
2306 ArgOffset = ((ArgOffset + Align - 1) / Align) * Align;
2307 // If there's no space left in the argument save area, we must
2308 // use memory (this check also catches zero-sized arguments).
2309 if (ArgOffset >= LinkageSize + ParamAreaSize)
2312 // Allocate argument on the stack.
2313 ArgOffset += CalculateStackSlotSize(ArgVT, Flags, PtrByteSize);
2314 if (Flags.isInConsecutiveRegsLast())
2315 ArgOffset = ((ArgOffset + PtrByteSize - 1)/PtrByteSize) * PtrByteSize;
2316 // If we overran the argument save area, we must use memory
2317 // (this check catches arguments passed partially in memory)
2318 if (ArgOffset > LinkageSize + ParamAreaSize)
2321 // However, if the argument is actually passed in an FPR or a VR,
2322 // we don't use memory after all.
2323 if (!Flags.isByVal()) {
2324 if (ArgVT == MVT::f32 || ArgVT == MVT::f64)
2325 if (AvailableFPRs > 0) {
2329 if (ArgVT == MVT::v4f32 || ArgVT == MVT::v4i32 ||
2330 ArgVT == MVT::v8i16 || ArgVT == MVT::v16i8 ||
2331 ArgVT == MVT::v2f64 || ArgVT == MVT::v2i64)
2332 if (AvailableVRs > 0) {
2341 /// EnsureStackAlignment - Round stack frame size up from NumBytes to
2342 /// ensure minimum alignment required for target.
2343 static unsigned EnsureStackAlignment(const TargetMachine &Target,
2344 unsigned NumBytes) {
2345 unsigned TargetAlign =
2346 Target.getSubtargetImpl()->getFrameLowering()->getStackAlignment();
2347 unsigned AlignMask = TargetAlign - 1;
2348 NumBytes = (NumBytes + AlignMask) & ~AlignMask;
2353 PPCTargetLowering::LowerFormalArguments(SDValue Chain,
2354 CallingConv::ID CallConv, bool isVarArg,
2355 const SmallVectorImpl<ISD::InputArg>
2357 SDLoc dl, SelectionDAG &DAG,
2358 SmallVectorImpl<SDValue> &InVals)
2360 if (Subtarget.isSVR4ABI()) {
2361 if (Subtarget.isPPC64())
2362 return LowerFormalArguments_64SVR4(Chain, CallConv, isVarArg, Ins,
2365 return LowerFormalArguments_32SVR4(Chain, CallConv, isVarArg, Ins,
2368 return LowerFormalArguments_Darwin(Chain, CallConv, isVarArg, Ins,
2374 PPCTargetLowering::LowerFormalArguments_32SVR4(
2376 CallingConv::ID CallConv, bool isVarArg,
2377 const SmallVectorImpl<ISD::InputArg>
2379 SDLoc dl, SelectionDAG &DAG,
2380 SmallVectorImpl<SDValue> &InVals) const {
2382 // 32-bit SVR4 ABI Stack Frame Layout:
2383 // +-----------------------------------+
2384 // +--> | Back chain |
2385 // | +-----------------------------------+
2386 // | | Floating-point register save area |
2387 // | +-----------------------------------+
2388 // | | General register save area |
2389 // | +-----------------------------------+
2390 // | | CR save word |
2391 // | +-----------------------------------+
2392 // | | VRSAVE save word |
2393 // | +-----------------------------------+
2394 // | | Alignment padding |
2395 // | +-----------------------------------+
2396 // | | Vector register save area |
2397 // | +-----------------------------------+
2398 // | | Local variable space |
2399 // | +-----------------------------------+
2400 // | | Parameter list area |
2401 // | +-----------------------------------+
2402 // | | LR save word |
2403 // | +-----------------------------------+
2404 // SP--> +--- | Back chain |
2405 // +-----------------------------------+
2408 // System V Application Binary Interface PowerPC Processor Supplement
2409 // AltiVec Technology Programming Interface Manual
2411 MachineFunction &MF = DAG.getMachineFunction();
2412 MachineFrameInfo *MFI = MF.getFrameInfo();
2413 PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>();
2415 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
2416 // Potential tail calls could cause overwriting of argument stack slots.
2417 bool isImmutable = !(getTargetMachine().Options.GuaranteedTailCallOpt &&
2418 (CallConv == CallingConv::Fast));
2419 unsigned PtrByteSize = 4;
2421 // Assign locations to all of the incoming arguments.
2422 SmallVector<CCValAssign, 16> ArgLocs;
2423 CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(), ArgLocs,
2426 // Reserve space for the linkage area on the stack.
2427 unsigned LinkageSize = PPCFrameLowering::getLinkageSize(false, false, false);
2428 CCInfo.AllocateStack(LinkageSize, PtrByteSize);
2430 CCInfo.AnalyzeFormalArguments(Ins, CC_PPC32_SVR4);
2432 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2433 CCValAssign &VA = ArgLocs[i];
2435 // Arguments stored in registers.
2436 if (VA.isRegLoc()) {
2437 const TargetRegisterClass *RC;
2438 EVT ValVT = VA.getValVT();
2440 switch (ValVT.getSimpleVT().SimpleTy) {
2442 llvm_unreachable("ValVT not supported by formal arguments Lowering");
2445 RC = &PPC::GPRCRegClass;
2448 RC = &PPC::F4RCRegClass;
2451 if (Subtarget.hasVSX())
2452 RC = &PPC::VSFRCRegClass;
2454 RC = &PPC::F8RCRegClass;
2460 RC = &PPC::VRRCRegClass;
2464 RC = &PPC::VSHRCRegClass;
2468 // Transform the arguments stored in physical registers into virtual ones.
2469 unsigned Reg = MF.addLiveIn(VA.getLocReg(), RC);
2470 SDValue ArgValue = DAG.getCopyFromReg(Chain, dl, Reg,
2471 ValVT == MVT::i1 ? MVT::i32 : ValVT);
2473 if (ValVT == MVT::i1)
2474 ArgValue = DAG.getNode(ISD::TRUNCATE, dl, MVT::i1, ArgValue);
2476 InVals.push_back(ArgValue);
2478 // Argument stored in memory.
2479 assert(VA.isMemLoc());
2481 unsigned ArgSize = VA.getLocVT().getStoreSize();
2482 int FI = MFI->CreateFixedObject(ArgSize, VA.getLocMemOffset(),
2485 // Create load nodes to retrieve arguments from the stack.
2486 SDValue FIN = DAG.getFrameIndex(FI, PtrVT);
2487 InVals.push_back(DAG.getLoad(VA.getValVT(), dl, Chain, FIN,
2488 MachinePointerInfo(),
2489 false, false, false, 0));
2493 // Assign locations to all of the incoming aggregate by value arguments.
2494 // Aggregates passed by value are stored in the local variable space of the
2495 // caller's stack frame, right above the parameter list area.
2496 SmallVector<CCValAssign, 16> ByValArgLocs;
2497 CCState CCByValInfo(CallConv, isVarArg, DAG.getMachineFunction(),
2498 ByValArgLocs, *DAG.getContext());
2500 // Reserve stack space for the allocations in CCInfo.
2501 CCByValInfo.AllocateStack(CCInfo.getNextStackOffset(), PtrByteSize);
2503 CCByValInfo.AnalyzeFormalArguments(Ins, CC_PPC32_SVR4_ByVal);
2505 // Area that is at least reserved in the caller of this function.
2506 unsigned MinReservedArea = CCByValInfo.getNextStackOffset();
2507 MinReservedArea = std::max(MinReservedArea, LinkageSize);
2509 // Set the size that is at least reserved in caller of this function. Tail
2510 // call optimized function's reserved stack space needs to be aligned so that
2511 // taking the difference between two stack areas will result in an aligned
2513 MinReservedArea = EnsureStackAlignment(MF.getTarget(), MinReservedArea);
2514 FuncInfo->setMinReservedArea(MinReservedArea);
2516 SmallVector<SDValue, 8> MemOps;
2518 // If the function takes variable number of arguments, make a frame index for
2519 // the start of the first vararg value... for expansion of llvm.va_start.
2521 static const MCPhysReg GPArgRegs[] = {
2522 PPC::R3, PPC::R4, PPC::R5, PPC::R6,
2523 PPC::R7, PPC::R8, PPC::R9, PPC::R10,
2525 const unsigned NumGPArgRegs = array_lengthof(GPArgRegs);
2527 static const MCPhysReg FPArgRegs[] = {
2528 PPC::F1, PPC::F2, PPC::F3, PPC::F4, PPC::F5, PPC::F6, PPC::F7,
2531 unsigned NumFPArgRegs = array_lengthof(FPArgRegs);
2532 if (DisablePPCFloatInVariadic)
2535 FuncInfo->setVarArgsNumGPR(CCInfo.getFirstUnallocated(GPArgRegs,
2537 FuncInfo->setVarArgsNumFPR(CCInfo.getFirstUnallocated(FPArgRegs,
2540 // Make room for NumGPArgRegs and NumFPArgRegs.
2541 int Depth = NumGPArgRegs * PtrVT.getSizeInBits()/8 +
2542 NumFPArgRegs * MVT(MVT::f64).getSizeInBits()/8;
2544 FuncInfo->setVarArgsStackOffset(
2545 MFI->CreateFixedObject(PtrVT.getSizeInBits()/8,
2546 CCInfo.getNextStackOffset(), true));
2548 FuncInfo->setVarArgsFrameIndex(MFI->CreateStackObject(Depth, 8, false));
2549 SDValue FIN = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(), PtrVT);
2551 // The fixed integer arguments of a variadic function are stored to the
2552 // VarArgsFrameIndex on the stack so that they may be loaded by deferencing
2553 // the result of va_next.
2554 for (unsigned GPRIndex = 0; GPRIndex != NumGPArgRegs; ++GPRIndex) {
2555 // Get an existing live-in vreg, or add a new one.
2556 unsigned VReg = MF.getRegInfo().getLiveInVirtReg(GPArgRegs[GPRIndex]);
2558 VReg = MF.addLiveIn(GPArgRegs[GPRIndex], &PPC::GPRCRegClass);
2560 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, PtrVT);
2561 SDValue Store = DAG.getStore(Val.getValue(1), dl, Val, FIN,
2562 MachinePointerInfo(), false, false, 0);
2563 MemOps.push_back(Store);
2564 // Increment the address by four for the next argument to store
2565 SDValue PtrOff = DAG.getConstant(PtrVT.getSizeInBits()/8, PtrVT);
2566 FIN = DAG.getNode(ISD::ADD, dl, PtrOff.getValueType(), FIN, PtrOff);
2569 // FIXME 32-bit SVR4: We only need to save FP argument registers if CR bit 6
2571 // The double arguments are stored to the VarArgsFrameIndex
2573 for (unsigned FPRIndex = 0; FPRIndex != NumFPArgRegs; ++FPRIndex) {
2574 // Get an existing live-in vreg, or add a new one.
2575 unsigned VReg = MF.getRegInfo().getLiveInVirtReg(FPArgRegs[FPRIndex]);
2577 VReg = MF.addLiveIn(FPArgRegs[FPRIndex], &PPC::F8RCRegClass);
2579 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::f64);
2580 SDValue Store = DAG.getStore(Val.getValue(1), dl, Val, FIN,
2581 MachinePointerInfo(), false, false, 0);
2582 MemOps.push_back(Store);
2583 // Increment the address by eight for the next argument to store
2584 SDValue PtrOff = DAG.getConstant(MVT(MVT::f64).getSizeInBits()/8,
2586 FIN = DAG.getNode(ISD::ADD, dl, PtrOff.getValueType(), FIN, PtrOff);
2590 if (!MemOps.empty())
2591 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOps);
2596 // PPC64 passes i8, i16, and i32 values in i64 registers. Promote
2597 // value to MVT::i64 and then truncate to the correct register size.
2599 PPCTargetLowering::extendArgForPPC64(ISD::ArgFlagsTy Flags, EVT ObjectVT,
2600 SelectionDAG &DAG, SDValue ArgVal,
2603 ArgVal = DAG.getNode(ISD::AssertSext, dl, MVT::i64, ArgVal,
2604 DAG.getValueType(ObjectVT));
2605 else if (Flags.isZExt())
2606 ArgVal = DAG.getNode(ISD::AssertZext, dl, MVT::i64, ArgVal,
2607 DAG.getValueType(ObjectVT));
2609 return DAG.getNode(ISD::TRUNCATE, dl, ObjectVT, ArgVal);
2613 PPCTargetLowering::LowerFormalArguments_64SVR4(
2615 CallingConv::ID CallConv, bool isVarArg,
2616 const SmallVectorImpl<ISD::InputArg>
2618 SDLoc dl, SelectionDAG &DAG,
2619 SmallVectorImpl<SDValue> &InVals) const {
2620 // TODO: add description of PPC stack frame format, or at least some docs.
2622 bool isELFv2ABI = Subtarget.isELFv2ABI();
2623 bool isLittleEndian = Subtarget.isLittleEndian();
2624 MachineFunction &MF = DAG.getMachineFunction();
2625 MachineFrameInfo *MFI = MF.getFrameInfo();
2626 PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>();
2628 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
2629 // Potential tail calls could cause overwriting of argument stack slots.
2630 bool isImmutable = !(getTargetMachine().Options.GuaranteedTailCallOpt &&
2631 (CallConv == CallingConv::Fast));
2632 unsigned PtrByteSize = 8;
2634 unsigned LinkageSize = PPCFrameLowering::getLinkageSize(true, false,
2637 static const MCPhysReg GPR[] = {
2638 PPC::X3, PPC::X4, PPC::X5, PPC::X6,
2639 PPC::X7, PPC::X8, PPC::X9, PPC::X10,
2642 static const MCPhysReg *FPR = GetFPR();
2644 static const MCPhysReg VR[] = {
2645 PPC::V2, PPC::V3, PPC::V4, PPC::V5, PPC::V6, PPC::V7, PPC::V8,
2646 PPC::V9, PPC::V10, PPC::V11, PPC::V12, PPC::V13
2648 static const MCPhysReg VSRH[] = {
2649 PPC::VSH2, PPC::VSH3, PPC::VSH4, PPC::VSH5, PPC::VSH6, PPC::VSH7, PPC::VSH8,
2650 PPC::VSH9, PPC::VSH10, PPC::VSH11, PPC::VSH12, PPC::VSH13
2653 const unsigned Num_GPR_Regs = array_lengthof(GPR);
2654 const unsigned Num_FPR_Regs = 13;
2655 const unsigned Num_VR_Regs = array_lengthof(VR);
2657 // Do a first pass over the arguments to determine whether the ABI
2658 // guarantees that our caller has allocated the parameter save area
2659 // on its stack frame. In the ELFv1 ABI, this is always the case;
2660 // in the ELFv2 ABI, it is true if this is a vararg function or if
2661 // any parameter is located in a stack slot.
2663 bool HasParameterArea = !isELFv2ABI || isVarArg;
2664 unsigned ParamAreaSize = Num_GPR_Regs * PtrByteSize;
2665 unsigned NumBytes = LinkageSize;
2666 unsigned AvailableFPRs = Num_FPR_Regs;
2667 unsigned AvailableVRs = Num_VR_Regs;
2668 for (unsigned i = 0, e = Ins.size(); i != e; ++i)
2669 if (CalculateStackSlotUsed(Ins[i].VT, Ins[i].ArgVT, Ins[i].Flags,
2670 PtrByteSize, LinkageSize, ParamAreaSize,
2671 NumBytes, AvailableFPRs, AvailableVRs))
2672 HasParameterArea = true;
2674 // Add DAG nodes to load the arguments or copy them out of registers. On
2675 // entry to a function on PPC, the arguments start after the linkage area,
2676 // although the first ones are often in registers.
2678 unsigned ArgOffset = LinkageSize;
2679 unsigned GPR_idx, FPR_idx = 0, VR_idx = 0;
2680 SmallVector<SDValue, 8> MemOps;
2681 Function::const_arg_iterator FuncArg = MF.getFunction()->arg_begin();
2682 unsigned CurArgIdx = 0;
2683 for (unsigned ArgNo = 0, e = Ins.size(); ArgNo != e; ++ArgNo) {
2685 bool needsLoad = false;
2686 EVT ObjectVT = Ins[ArgNo].VT;
2687 EVT OrigVT = Ins[ArgNo].ArgVT;
2688 unsigned ObjSize = ObjectVT.getStoreSize();
2689 unsigned ArgSize = ObjSize;
2690 ISD::ArgFlagsTy Flags = Ins[ArgNo].Flags;
2691 if (Ins[ArgNo].isOrigArg()) {
2692 std::advance(FuncArg, Ins[ArgNo].getOrigArgIndex() - CurArgIdx);
2693 CurArgIdx = Ins[ArgNo].getOrigArgIndex();
2695 /* Respect alignment of argument on the stack. */
2697 CalculateStackSlotAlignment(ObjectVT, OrigVT, Flags, PtrByteSize);
2698 ArgOffset = ((ArgOffset + Align - 1) / Align) * Align;
2699 unsigned CurArgOffset = ArgOffset;
2701 /* Compute GPR index associated with argument offset. */
2702 GPR_idx = (ArgOffset - LinkageSize) / PtrByteSize;
2703 GPR_idx = std::min(GPR_idx, Num_GPR_Regs);
2705 // FIXME the codegen can be much improved in some cases.
2706 // We do not have to keep everything in memory.
2707 if (Flags.isByVal()) {
2708 assert(Ins[ArgNo].isOrigArg() && "Byval arguments cannot be implicit");
2710 // ObjSize is the true size, ArgSize rounded up to multiple of registers.
2711 ObjSize = Flags.getByValSize();
2712 ArgSize = ((ObjSize + PtrByteSize - 1)/PtrByteSize) * PtrByteSize;
2713 // Empty aggregate parameters do not take up registers. Examples:
2717 // etc. However, we have to provide a place-holder in InVals, so
2718 // pretend we have an 8-byte item at the current address for that
2721 int FI = MFI->CreateFixedObject(PtrByteSize, ArgOffset, true);
2722 SDValue FIN = DAG.getFrameIndex(FI, PtrVT);
2723 InVals.push_back(FIN);
2727 // Create a stack object covering all stack doublewords occupied
2728 // by the argument. If the argument is (fully or partially) on
2729 // the stack, or if the argument is fully in registers but the
2730 // caller has allocated the parameter save anyway, we can refer
2731 // directly to the caller's stack frame. Otherwise, create a
2732 // local copy in our own frame.
2734 if (HasParameterArea ||
2735 ArgSize + ArgOffset > LinkageSize + Num_GPR_Regs * PtrByteSize)
2736 FI = MFI->CreateFixedObject(ArgSize, ArgOffset, false, true);
2738 FI = MFI->CreateStackObject(ArgSize, Align, false);
2739 SDValue FIN = DAG.getFrameIndex(FI, PtrVT);
2741 // Handle aggregates smaller than 8 bytes.
2742 if (ObjSize < PtrByteSize) {
2743 // The value of the object is its address, which differs from the
2744 // address of the enclosing doubleword on big-endian systems.
2746 if (!isLittleEndian) {
2747 SDValue ArgOff = DAG.getConstant(PtrByteSize - ObjSize, PtrVT);
2748 Arg = DAG.getNode(ISD::ADD, dl, ArgOff.getValueType(), Arg, ArgOff);
2750 InVals.push_back(Arg);
2752 if (GPR_idx != Num_GPR_Regs) {
2753 unsigned VReg = MF.addLiveIn(GPR[GPR_idx], &PPC::G8RCRegClass);
2754 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, PtrVT);
2757 if (ObjSize==1 || ObjSize==2 || ObjSize==4) {
2758 EVT ObjType = (ObjSize == 1 ? MVT::i8 :
2759 (ObjSize == 2 ? MVT::i16 : MVT::i32));
2760 Store = DAG.getTruncStore(Val.getValue(1), dl, Val, Arg,
2761 MachinePointerInfo(FuncArg),
2762 ObjType, false, false, 0);
2764 // For sizes that don't fit a truncating store (3, 5, 6, 7),
2765 // store the whole register as-is to the parameter save area
2767 Store = DAG.getStore(Val.getValue(1), dl, Val, FIN,
2768 MachinePointerInfo(FuncArg),
2772 MemOps.push_back(Store);
2774 // Whether we copied from a register or not, advance the offset
2775 // into the parameter save area by a full doubleword.
2776 ArgOffset += PtrByteSize;
2780 // The value of the object is its address, which is the address of
2781 // its first stack doubleword.
2782 InVals.push_back(FIN);
2784 // Store whatever pieces of the object are in registers to memory.
2785 for (unsigned j = 0; j < ArgSize; j += PtrByteSize) {
2786 if (GPR_idx == Num_GPR_Regs)
2789 unsigned VReg = MF.addLiveIn(GPR[GPR_idx], &PPC::G8RCRegClass);
2790 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, PtrVT);
2793 SDValue Off = DAG.getConstant(j, PtrVT);
2794 Addr = DAG.getNode(ISD::ADD, dl, Off.getValueType(), Addr, Off);
2796 SDValue Store = DAG.getStore(Val.getValue(1), dl, Val, Addr,
2797 MachinePointerInfo(FuncArg, j),
2799 MemOps.push_back(Store);
2802 ArgOffset += ArgSize;
2806 switch (ObjectVT.getSimpleVT().SimpleTy) {
2807 default: llvm_unreachable("Unhandled argument type!");
2811 // These can be scalar arguments or elements of an integer array type
2812 // passed directly. Clang may use those instead of "byval" aggregate
2813 // types to avoid forcing arguments to memory unnecessarily.
2814 if (GPR_idx != Num_GPR_Regs) {
2815 unsigned VReg = MF.addLiveIn(GPR[GPR_idx], &PPC::G8RCRegClass);
2816 ArgVal = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i64);
2818 if (ObjectVT == MVT::i32 || ObjectVT == MVT::i1)
2819 // PPC64 passes i8, i16, and i32 values in i64 registers. Promote
2820 // value to MVT::i64 and then truncate to the correct register size.
2821 ArgVal = extendArgForPPC64(Flags, ObjectVT, DAG, ArgVal, dl);
2824 ArgSize = PtrByteSize;
2831 // These can be scalar arguments or elements of a float array type
2832 // passed directly. The latter are used to implement ELFv2 homogenous
2833 // float aggregates.
2834 if (FPR_idx != Num_FPR_Regs) {
2837 if (ObjectVT == MVT::f32)
2838 VReg = MF.addLiveIn(FPR[FPR_idx], &PPC::F4RCRegClass);
2840 VReg = MF.addLiveIn(FPR[FPR_idx], Subtarget.hasVSX() ?
2841 &PPC::VSFRCRegClass :
2842 &PPC::F8RCRegClass);
2844 ArgVal = DAG.getCopyFromReg(Chain, dl, VReg, ObjectVT);
2846 } else if (GPR_idx != Num_GPR_Regs) {
2847 // This can only ever happen in the presence of f32 array types,
2848 // since otherwise we never run out of FPRs before running out
2850 unsigned VReg = MF.addLiveIn(GPR[GPR_idx], &PPC::G8RCRegClass);
2851 ArgVal = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i64);
2853 if (ObjectVT == MVT::f32) {
2854 if ((ArgOffset % PtrByteSize) == (isLittleEndian ? 4 : 0))
2855 ArgVal = DAG.getNode(ISD::SRL, dl, MVT::i64, ArgVal,
2856 DAG.getConstant(32, MVT::i32));
2857 ArgVal = DAG.getNode(ISD::TRUNCATE, dl, MVT::i32, ArgVal);
2860 ArgVal = DAG.getNode(ISD::BITCAST, dl, ObjectVT, ArgVal);
2865 // When passing an array of floats, the array occupies consecutive
2866 // space in the argument area; only round up to the next doubleword
2867 // at the end of the array. Otherwise, each float takes 8 bytes.
2868 ArgSize = Flags.isInConsecutiveRegs() ? ObjSize : PtrByteSize;
2869 ArgOffset += ArgSize;
2870 if (Flags.isInConsecutiveRegsLast())
2871 ArgOffset = ((ArgOffset + PtrByteSize - 1)/PtrByteSize) * PtrByteSize;
2879 // These can be scalar arguments or elements of a vector array type
2880 // passed directly. The latter are used to implement ELFv2 homogenous
2881 // vector aggregates.
2882 if (VR_idx != Num_VR_Regs) {
2883 unsigned VReg = (ObjectVT == MVT::v2f64 || ObjectVT == MVT::v2i64) ?
2884 MF.addLiveIn(VSRH[VR_idx], &PPC::VSHRCRegClass) :
2885 MF.addLiveIn(VR[VR_idx], &PPC::VRRCRegClass);
2886 ArgVal = DAG.getCopyFromReg(Chain, dl, VReg, ObjectVT);
2895 // We need to load the argument to a virtual register if we determined
2896 // above that we ran out of physical registers of the appropriate type.
2898 if (ObjSize < ArgSize && !isLittleEndian)
2899 CurArgOffset += ArgSize - ObjSize;
2900 int FI = MFI->CreateFixedObject(ObjSize, CurArgOffset, isImmutable);
2901 SDValue FIN = DAG.getFrameIndex(FI, PtrVT);
2902 ArgVal = DAG.getLoad(ObjectVT, dl, Chain, FIN, MachinePointerInfo(),
2903 false, false, false, 0);
2906 InVals.push_back(ArgVal);
2909 // Area that is at least reserved in the caller of this function.
2910 unsigned MinReservedArea;
2911 if (HasParameterArea)
2912 MinReservedArea = std::max(ArgOffset, LinkageSize + 8 * PtrByteSize);
2914 MinReservedArea = LinkageSize;
2916 // Set the size that is at least reserved in caller of this function. Tail
2917 // call optimized functions' reserved stack space needs to be aligned so that
2918 // taking the difference between two stack areas will result in an aligned
2920 MinReservedArea = EnsureStackAlignment(MF.getTarget(), MinReservedArea);
2921 FuncInfo->setMinReservedArea(MinReservedArea);
2923 // If the function takes variable number of arguments, make a frame index for
2924 // the start of the first vararg value... for expansion of llvm.va_start.
2926 int Depth = ArgOffset;
2928 FuncInfo->setVarArgsFrameIndex(
2929 MFI->CreateFixedObject(PtrByteSize, Depth, true));
2930 SDValue FIN = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(), PtrVT);
2932 // If this function is vararg, store any remaining integer argument regs
2933 // to their spots on the stack so that they may be loaded by deferencing the
2934 // result of va_next.
2935 for (GPR_idx = (ArgOffset - LinkageSize) / PtrByteSize;
2936 GPR_idx < Num_GPR_Regs; ++GPR_idx) {
2937 unsigned VReg = MF.addLiveIn(GPR[GPR_idx], &PPC::G8RCRegClass);
2938 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, PtrVT);
2939 SDValue Store = DAG.getStore(Val.getValue(1), dl, Val, FIN,
2940 MachinePointerInfo(), false, false, 0);
2941 MemOps.push_back(Store);
2942 // Increment the address by four for the next argument to store
2943 SDValue PtrOff = DAG.getConstant(PtrByteSize, PtrVT);
2944 FIN = DAG.getNode(ISD::ADD, dl, PtrOff.getValueType(), FIN, PtrOff);
2948 if (!MemOps.empty())
2949 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOps);
2955 PPCTargetLowering::LowerFormalArguments_Darwin(
2957 CallingConv::ID CallConv, bool isVarArg,
2958 const SmallVectorImpl<ISD::InputArg>
2960 SDLoc dl, SelectionDAG &DAG,
2961 SmallVectorImpl<SDValue> &InVals) const {
2962 // TODO: add description of PPC stack frame format, or at least some docs.
2964 MachineFunction &MF = DAG.getMachineFunction();
2965 MachineFrameInfo *MFI = MF.getFrameInfo();
2966 PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>();
2968 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
2969 bool isPPC64 = PtrVT == MVT::i64;
2970 // Potential tail calls could cause overwriting of argument stack slots.
2971 bool isImmutable = !(getTargetMachine().Options.GuaranteedTailCallOpt &&
2972 (CallConv == CallingConv::Fast));
2973 unsigned PtrByteSize = isPPC64 ? 8 : 4;
2975 unsigned LinkageSize = PPCFrameLowering::getLinkageSize(isPPC64, true,
2977 unsigned ArgOffset = LinkageSize;
2978 // Area that is at least reserved in caller of this function.
2979 unsigned MinReservedArea = ArgOffset;
2981 static const MCPhysReg GPR_32[] = { // 32-bit registers.
2982 PPC::R3, PPC::R4, PPC::R5, PPC::R6,
2983 PPC::R7, PPC::R8, PPC::R9, PPC::R10,
2985 static const MCPhysReg GPR_64[] = { // 64-bit registers.
2986 PPC::X3, PPC::X4, PPC::X5, PPC::X6,
2987 PPC::X7, PPC::X8, PPC::X9, PPC::X10,
2990 static const MCPhysReg *FPR = GetFPR();
2992 static const MCPhysReg VR[] = {
2993 PPC::V2, PPC::V3, PPC::V4, PPC::V5, PPC::V6, PPC::V7, PPC::V8,
2994 PPC::V9, PPC::V10, PPC::V11, PPC::V12, PPC::V13
2997 const unsigned Num_GPR_Regs = array_lengthof(GPR_32);
2998 const unsigned Num_FPR_Regs = 13;
2999 const unsigned Num_VR_Regs = array_lengthof( VR);
3001 unsigned GPR_idx = 0, FPR_idx = 0, VR_idx = 0;
3003 const MCPhysReg *GPR = isPPC64 ? GPR_64 : GPR_32;
3005 // In 32-bit non-varargs functions, the stack space for vectors is after the
3006 // stack space for non-vectors. We do not use this space unless we have
3007 // too many vectors to fit in registers, something that only occurs in
3008 // constructed examples:), but we have to walk the arglist to figure
3009 // that out...for the pathological case, compute VecArgOffset as the
3010 // start of the vector parameter area. Computing VecArgOffset is the
3011 // entire point of the following loop.
3012 unsigned VecArgOffset = ArgOffset;
3013 if (!isVarArg && !isPPC64) {
3014 for (unsigned ArgNo = 0, e = Ins.size(); ArgNo != e;
3016 EVT ObjectVT = Ins[ArgNo].VT;
3017 ISD::ArgFlagsTy Flags = Ins[ArgNo].Flags;
3019 if (Flags.isByVal()) {
3020 // ObjSize is the true size, ArgSize rounded up to multiple of regs.
3021 unsigned ObjSize = Flags.getByValSize();
3023 ((ObjSize + PtrByteSize - 1)/PtrByteSize) * PtrByteSize;
3024 VecArgOffset += ArgSize;
3028 switch(ObjectVT.getSimpleVT().SimpleTy) {
3029 default: llvm_unreachable("Unhandled argument type!");
3035 case MVT::i64: // PPC64
3037 // FIXME: We are guaranteed to be !isPPC64 at this point.
3038 // Does MVT::i64 apply?
3045 // Nothing to do, we're only looking at Nonvector args here.
3050 // We've found where the vector parameter area in memory is. Skip the
3051 // first 12 parameters; these don't use that memory.
3052 VecArgOffset = ((VecArgOffset+15)/16)*16;
3053 VecArgOffset += 12*16;
3055 // Add DAG nodes to load the arguments or copy them out of registers. On
3056 // entry to a function on PPC, the arguments start after the linkage area,
3057 // although the first ones are often in registers.
3059 SmallVector<SDValue, 8> MemOps;
3060 unsigned nAltivecParamsAtEnd = 0;
3061 Function::const_arg_iterator FuncArg = MF.getFunction()->arg_begin();
3062 unsigned CurArgIdx = 0;
3063 for (unsigned ArgNo = 0, e = Ins.size(); ArgNo != e; ++ArgNo) {
3065 bool needsLoad = false;
3066 EVT ObjectVT = Ins[ArgNo].VT;
3067 unsigned ObjSize = ObjectVT.getSizeInBits()/8;
3068 unsigned ArgSize = ObjSize;
3069 ISD::ArgFlagsTy Flags = Ins[ArgNo].Flags;
3070 if (Ins[ArgNo].isOrigArg()) {
3071 std::advance(FuncArg, Ins[ArgNo].getOrigArgIndex() - CurArgIdx);
3072 CurArgIdx = Ins[ArgNo].getOrigArgIndex();
3074 unsigned CurArgOffset = ArgOffset;
3076 // Varargs or 64 bit Altivec parameters are padded to a 16 byte boundary.
3077 if (ObjectVT==MVT::v4f32 || ObjectVT==MVT::v4i32 ||
3078 ObjectVT==MVT::v8i16 || ObjectVT==MVT::v16i8) {
3079 if (isVarArg || isPPC64) {
3080 MinReservedArea = ((MinReservedArea+15)/16)*16;
3081 MinReservedArea += CalculateStackSlotSize(ObjectVT,
3084 } else nAltivecParamsAtEnd++;
3086 // Calculate min reserved area.
3087 MinReservedArea += CalculateStackSlotSize(Ins[ArgNo].VT,
3091 // FIXME the codegen can be much improved in some cases.
3092 // We do not have to keep everything in memory.
3093 if (Flags.isByVal()) {
3094 assert(Ins[ArgNo].isOrigArg() && "Byval arguments cannot be implicit");
3096 // ObjSize is the true size, ArgSize rounded up to multiple of registers.
3097 ObjSize = Flags.getByValSize();
3098 ArgSize = ((ObjSize + PtrByteSize - 1)/PtrByteSize) * PtrByteSize;
3099 // Objects of size 1 and 2 are right justified, everything else is
3100 // left justified. This means the memory address is adjusted forwards.
3101 if (ObjSize==1 || ObjSize==2) {
3102 CurArgOffset = CurArgOffset + (4 - ObjSize);
3104 // The value of the object is its address.
3105 int FI = MFI->CreateFixedObject(ObjSize, CurArgOffset, false, true);
3106 SDValue FIN = DAG.getFrameIndex(FI, PtrVT);
3107 InVals.push_back(FIN);
3108 if (ObjSize==1 || ObjSize==2) {
3109 if (GPR_idx != Num_GPR_Regs) {
3112 VReg = MF.addLiveIn(GPR[GPR_idx], &PPC::G8RCRegClass);
3114 VReg = MF.addLiveIn(GPR[GPR_idx], &PPC::GPRCRegClass);
3115 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, PtrVT);
3116 EVT ObjType = ObjSize == 1 ? MVT::i8 : MVT::i16;
3117 SDValue Store = DAG.getTruncStore(Val.getValue(1), dl, Val, FIN,
3118 MachinePointerInfo(FuncArg),
3119 ObjType, false, false, 0);
3120 MemOps.push_back(Store);
3124 ArgOffset += PtrByteSize;
3128 for (unsigned j = 0; j < ArgSize; j += PtrByteSize) {
3129 // Store whatever pieces of the object are in registers
3130 // to memory. ArgOffset will be the address of the beginning
3132 if (GPR_idx != Num_GPR_Regs) {
3135 VReg = MF.addLiveIn(GPR[GPR_idx], &PPC::G8RCRegClass);
3137 VReg = MF.addLiveIn(GPR[GPR_idx], &PPC::GPRCRegClass);
3138 int FI = MFI->CreateFixedObject(PtrByteSize, ArgOffset, true);
3139 SDValue FIN = DAG.getFrameIndex(FI, PtrVT);
3140 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, PtrVT);
3141 SDValue Store = DAG.getStore(Val.getValue(1), dl, Val, FIN,
3142 MachinePointerInfo(FuncArg, j),
3144 MemOps.push_back(Store);
3146 ArgOffset += PtrByteSize;
3148 ArgOffset += ArgSize - (ArgOffset-CurArgOffset);
3155 switch (ObjectVT.getSimpleVT().SimpleTy) {
3156 default: llvm_unreachable("Unhandled argument type!");
3160 if (GPR_idx != Num_GPR_Regs) {
3161 unsigned VReg = MF.addLiveIn(GPR[GPR_idx], &PPC::GPRCRegClass);
3162 ArgVal = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i32);
3164 if (ObjectVT == MVT::i1)
3165 ArgVal = DAG.getNode(ISD::TRUNCATE, dl, MVT::i1, ArgVal);
3170 ArgSize = PtrByteSize;
3172 // All int arguments reserve stack space in the Darwin ABI.
3173 ArgOffset += PtrByteSize;
3177 case MVT::i64: // PPC64
3178 if (GPR_idx != Num_GPR_Regs) {
3179 unsigned VReg = MF.addLiveIn(GPR[GPR_idx], &PPC::G8RCRegClass);
3180 ArgVal = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i64);
3182 if (ObjectVT == MVT::i32 || ObjectVT == MVT::i1)
3183 // PPC64 passes i8, i16, and i32 values in i64 registers. Promote
3184 // value to MVT::i64 and then truncate to the correct register size.
3185 ArgVal = extendArgForPPC64(Flags, ObjectVT, DAG, ArgVal, dl);
3190 ArgSize = PtrByteSize;
3192 // All int arguments reserve stack space in the Darwin ABI.
3198 // Every 4 bytes of argument space consumes one of the GPRs available for
3199 // argument passing.
3200 if (GPR_idx != Num_GPR_Regs) {
3202 if (ObjSize == 8 && GPR_idx != Num_GPR_Regs && !isPPC64)
3205 if (FPR_idx != Num_FPR_Regs) {
3208 if (ObjectVT == MVT::f32)
3209 VReg = MF.addLiveIn(FPR[FPR_idx], &PPC::F4RCRegClass);
3211 VReg = MF.addLiveIn(FPR[FPR_idx], &PPC::F8RCRegClass);
3213 ArgVal = DAG.getCopyFromReg(Chain, dl, VReg, ObjectVT);
3219 // All FP arguments reserve stack space in the Darwin ABI.
3220 ArgOffset += isPPC64 ? 8 : ObjSize;
3226 // Note that vector arguments in registers don't reserve stack space,
3227 // except in varargs functions.
3228 if (VR_idx != Num_VR_Regs) {
3229 unsigned VReg = MF.addLiveIn(VR[VR_idx], &PPC::VRRCRegClass);
3230 ArgVal = DAG.getCopyFromReg(Chain, dl, VReg, ObjectVT);
3232 while ((ArgOffset % 16) != 0) {
3233 ArgOffset += PtrByteSize;
3234 if (GPR_idx != Num_GPR_Regs)
3238 GPR_idx = std::min(GPR_idx+4, Num_GPR_Regs); // FIXME correct for ppc64?
3242 if (!isVarArg && !isPPC64) {
3243 // Vectors go after all the nonvectors.
3244 CurArgOffset = VecArgOffset;
3247 // Vectors are aligned.
3248 ArgOffset = ((ArgOffset+15)/16)*16;
3249 CurArgOffset = ArgOffset;
3257 // We need to load the argument to a virtual register if we determined above
3258 // that we ran out of physical registers of the appropriate type.
3260 int FI = MFI->CreateFixedObject(ObjSize,
3261 CurArgOffset + (ArgSize - ObjSize),
3263 SDValue FIN = DAG.getFrameIndex(FI, PtrVT);
3264 ArgVal = DAG.getLoad(ObjectVT, dl, Chain, FIN, MachinePointerInfo(),
3265 false, false, false, 0);
3268 InVals.push_back(ArgVal);
3271 // Allow for Altivec parameters at the end, if needed.
3272 if (nAltivecParamsAtEnd) {
3273 MinReservedArea = ((MinReservedArea+15)/16)*16;
3274 MinReservedArea += 16*nAltivecParamsAtEnd;
3277 // Area that is at least reserved in the caller of this function.
3278 MinReservedArea = std::max(MinReservedArea, LinkageSize + 8 * PtrByteSize);
3280 // Set the size that is at least reserved in caller of this function. Tail
3281 // call optimized functions' reserved stack space needs to be aligned so that
3282 // taking the difference between two stack areas will result in an aligned
3284 MinReservedArea = EnsureStackAlignment(MF.getTarget(), MinReservedArea);
3285 FuncInfo->setMinReservedArea(MinReservedArea);
3287 // If the function takes variable number of arguments, make a frame index for
3288 // the start of the first vararg value... for expansion of llvm.va_start.
3290 int Depth = ArgOffset;
3292 FuncInfo->setVarArgsFrameIndex(
3293 MFI->CreateFixedObject(PtrVT.getSizeInBits()/8,
3295 SDValue FIN = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(), PtrVT);
3297 // If this function is vararg, store any remaining integer argument regs
3298 // to their spots on the stack so that they may be loaded by deferencing the
3299 // result of va_next.
3300 for (; GPR_idx != Num_GPR_Regs; ++GPR_idx) {
3304 VReg = MF.addLiveIn(GPR[GPR_idx], &PPC::G8RCRegClass);
3306 VReg = MF.addLiveIn(GPR[GPR_idx], &PPC::GPRCRegClass);
3308 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, PtrVT);
3309 SDValue Store = DAG.getStore(Val.getValue(1), dl, Val, FIN,
3310 MachinePointerInfo(), false, false, 0);
3311 MemOps.push_back(Store);
3312 // Increment the address by four for the next argument to store
3313 SDValue PtrOff = DAG.getConstant(PtrVT.getSizeInBits()/8, PtrVT);
3314 FIN = DAG.getNode(ISD::ADD, dl, PtrOff.getValueType(), FIN, PtrOff);
3318 if (!MemOps.empty())
3319 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOps);
3324 /// CalculateTailCallSPDiff - Get the amount the stack pointer has to be
3325 /// adjusted to accommodate the arguments for the tailcall.
3326 static int CalculateTailCallSPDiff(SelectionDAG& DAG, bool isTailCall,
3327 unsigned ParamSize) {
3329 if (!isTailCall) return 0;
3331 PPCFunctionInfo *FI = DAG.getMachineFunction().getInfo<PPCFunctionInfo>();
3332 unsigned CallerMinReservedArea = FI->getMinReservedArea();
3333 int SPDiff = (int)CallerMinReservedArea - (int)ParamSize;
3334 // Remember only if the new adjustement is bigger.
3335 if (SPDiff < FI->getTailCallSPDelta())
3336 FI->setTailCallSPDelta(SPDiff);
3341 /// IsEligibleForTailCallOptimization - Check whether the call is eligible
3342 /// for tail call optimization. Targets which want to do tail call
3343 /// optimization should implement this function.
3345 PPCTargetLowering::IsEligibleForTailCallOptimization(SDValue Callee,
3346 CallingConv::ID CalleeCC,
3348 const SmallVectorImpl<ISD::InputArg> &Ins,
3349 SelectionDAG& DAG) const {
3350 if (!getTargetMachine().Options.GuaranteedTailCallOpt)
3353 // Variable argument functions are not supported.
3357 MachineFunction &MF = DAG.getMachineFunction();
3358 CallingConv::ID CallerCC = MF.getFunction()->getCallingConv();
3359 if (CalleeCC == CallingConv::Fast && CallerCC == CalleeCC) {
3360 // Functions containing by val parameters are not supported.
3361 for (unsigned i = 0; i != Ins.size(); i++) {
3362 ISD::ArgFlagsTy Flags = Ins[i].Flags;
3363 if (Flags.isByVal()) return false;
3366 // Non-PIC/GOT tail calls are supported.
3367 if (getTargetMachine().getRelocationModel() != Reloc::PIC_)
3370 // At the moment we can only do local tail calls (in same module, hidden
3371 // or protected) if we are generating PIC.
3372 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee))
3373 return G->getGlobal()->hasHiddenVisibility()
3374 || G->getGlobal()->hasProtectedVisibility();
3380 /// isCallCompatibleAddress - Return the immediate to use if the specified
3381 /// 32-bit value is representable in the immediate field of a BxA instruction.
3382 static SDNode *isBLACompatibleAddress(SDValue Op, SelectionDAG &DAG) {
3383 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op);
3384 if (!C) return nullptr;
3386 int Addr = C->getZExtValue();
3387 if ((Addr & 3) != 0 || // Low 2 bits are implicitly zero.
3388 SignExtend32<26>(Addr) != Addr)
3389 return nullptr; // Top 6 bits have to be sext of immediate.
3391 return DAG.getConstant((int)C->getZExtValue() >> 2,
3392 DAG.getTargetLoweringInfo().getPointerTy()).getNode();
3397 struct TailCallArgumentInfo {
3402 TailCallArgumentInfo() : FrameIdx(0) {}
3407 /// StoreTailCallArgumentsToStackSlot - Stores arguments to their stack slot.
3409 StoreTailCallArgumentsToStackSlot(SelectionDAG &DAG,
3411 const SmallVectorImpl<TailCallArgumentInfo> &TailCallArgs,
3412 SmallVectorImpl<SDValue> &MemOpChains,
3414 for (unsigned i = 0, e = TailCallArgs.size(); i != e; ++i) {
3415 SDValue Arg = TailCallArgs[i].Arg;
3416 SDValue FIN = TailCallArgs[i].FrameIdxOp;
3417 int FI = TailCallArgs[i].FrameIdx;
3418 // Store relative to framepointer.
3419 MemOpChains.push_back(DAG.getStore(Chain, dl, Arg, FIN,
3420 MachinePointerInfo::getFixedStack(FI),
3425 /// EmitTailCallStoreFPAndRetAddr - Move the frame pointer and return address to
3426 /// the appropriate stack slot for the tail call optimized function call.
3427 static SDValue EmitTailCallStoreFPAndRetAddr(SelectionDAG &DAG,
3428 MachineFunction &MF,
3437 // Calculate the new stack slot for the return address.
3438 int SlotSize = isPPC64 ? 8 : 4;
3439 int NewRetAddrLoc = SPDiff + PPCFrameLowering::getReturnSaveOffset(isPPC64,
3441 int NewRetAddr = MF.getFrameInfo()->CreateFixedObject(SlotSize,
3442 NewRetAddrLoc, true);
3443 EVT VT = isPPC64 ? MVT::i64 : MVT::i32;
3444 SDValue NewRetAddrFrIdx = DAG.getFrameIndex(NewRetAddr, VT);
3445 Chain = DAG.getStore(Chain, dl, OldRetAddr, NewRetAddrFrIdx,
3446 MachinePointerInfo::getFixedStack(NewRetAddr),
3449 // When using the 32/64-bit SVR4 ABI there is no need to move the FP stack
3450 // slot as the FP is never overwritten.
3453 SPDiff + PPCFrameLowering::getFramePointerSaveOffset(isPPC64, isDarwinABI);
3454 int NewFPIdx = MF.getFrameInfo()->CreateFixedObject(SlotSize, NewFPLoc,
3456 SDValue NewFramePtrIdx = DAG.getFrameIndex(NewFPIdx, VT);
3457 Chain = DAG.getStore(Chain, dl, OldFP, NewFramePtrIdx,
3458 MachinePointerInfo::getFixedStack(NewFPIdx),
3465 /// CalculateTailCallArgDest - Remember Argument for later processing. Calculate
3466 /// the position of the argument.
3468 CalculateTailCallArgDest(SelectionDAG &DAG, MachineFunction &MF, bool isPPC64,
3469 SDValue Arg, int SPDiff, unsigned ArgOffset,
3470 SmallVectorImpl<TailCallArgumentInfo>& TailCallArguments) {
3471 int Offset = ArgOffset + SPDiff;
3472 uint32_t OpSize = (Arg.getValueType().getSizeInBits()+7)/8;
3473 int FI = MF.getFrameInfo()->CreateFixedObject(OpSize, Offset, true);
3474 EVT VT = isPPC64 ? MVT::i64 : MVT::i32;
3475 SDValue FIN = DAG.getFrameIndex(FI, VT);
3476 TailCallArgumentInfo Info;
3478 Info.FrameIdxOp = FIN;
3480 TailCallArguments.push_back(Info);
3483 /// EmitTCFPAndRetAddrLoad - Emit load from frame pointer and return address
3484 /// stack slot. Returns the chain as result and the loaded frame pointers in
3485 /// LROpOut/FPOpout. Used when tail calling.
3486 SDValue PPCTargetLowering::EmitTailCallLoadFPAndRetAddr(SelectionDAG & DAG,
3494 // Load the LR and FP stack slot for later adjusting.
3495 EVT VT = Subtarget.isPPC64() ? MVT::i64 : MVT::i32;
3496 LROpOut = getReturnAddrFrameIndex(DAG);
3497 LROpOut = DAG.getLoad(VT, dl, Chain, LROpOut, MachinePointerInfo(),
3498 false, false, false, 0);
3499 Chain = SDValue(LROpOut.getNode(), 1);
3501 // When using the 32/64-bit SVR4 ABI there is no need to load the FP stack
3502 // slot as the FP is never overwritten.
3504 FPOpOut = getFramePointerFrameIndex(DAG);
3505 FPOpOut = DAG.getLoad(VT, dl, Chain, FPOpOut, MachinePointerInfo(),
3506 false, false, false, 0);
3507 Chain = SDValue(FPOpOut.getNode(), 1);
3513 /// CreateCopyOfByValArgument - Make a copy of an aggregate at address specified
3514 /// by "Src" to address "Dst" of size "Size". Alignment information is
3515 /// specified by the specific parameter attribute. The copy will be passed as
3516 /// a byval function parameter.
3517 /// Sometimes what we are copying is the end of a larger object, the part that
3518 /// does not fit in registers.
3520 CreateCopyOfByValArgument(SDValue Src, SDValue Dst, SDValue Chain,
3521 ISD::ArgFlagsTy Flags, SelectionDAG &DAG,
3523 SDValue SizeNode = DAG.getConstant(Flags.getByValSize(), MVT::i32);
3524 return DAG.getMemcpy(Chain, dl, Dst, Src, SizeNode, Flags.getByValAlign(),
3525 false, false, MachinePointerInfo(),
3526 MachinePointerInfo());
3529 /// LowerMemOpCallTo - Store the argument to the stack or remember it in case of
3532 LowerMemOpCallTo(SelectionDAG &DAG, MachineFunction &MF, SDValue Chain,
3533 SDValue Arg, SDValue PtrOff, int SPDiff,
3534 unsigned ArgOffset, bool isPPC64, bool isTailCall,
3535 bool isVector, SmallVectorImpl<SDValue> &MemOpChains,
3536 SmallVectorImpl<TailCallArgumentInfo> &TailCallArguments,
3538 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
3543 StackPtr = DAG.getRegister(PPC::X1, MVT::i64);
3545 StackPtr = DAG.getRegister(PPC::R1, MVT::i32);
3546 PtrOff = DAG.getNode(ISD::ADD, dl, PtrVT, StackPtr,
3547 DAG.getConstant(ArgOffset, PtrVT));
3549 MemOpChains.push_back(DAG.getStore(Chain, dl, Arg, PtrOff,
3550 MachinePointerInfo(), false, false, 0));
3551 // Calculate and remember argument location.
3552 } else CalculateTailCallArgDest(DAG, MF, isPPC64, Arg, SPDiff, ArgOffset,
3557 void PrepareTailCall(SelectionDAG &DAG, SDValue &InFlag, SDValue &Chain,
3558 SDLoc dl, bool isPPC64, int SPDiff, unsigned NumBytes,
3559 SDValue LROp, SDValue FPOp, bool isDarwinABI,
3560 SmallVectorImpl<TailCallArgumentInfo> &TailCallArguments) {
3561 MachineFunction &MF = DAG.getMachineFunction();
3563 // Emit a sequence of copyto/copyfrom virtual registers for arguments that
3564 // might overwrite each other in case of tail call optimization.
3565 SmallVector<SDValue, 8> MemOpChains2;
3566 // Do not flag preceding copytoreg stuff together with the following stuff.
3568 StoreTailCallArgumentsToStackSlot(DAG, Chain, TailCallArguments,
3570 if (!MemOpChains2.empty())
3571 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOpChains2);
3573 // Store the return address to the appropriate stack slot.
3574 Chain = EmitTailCallStoreFPAndRetAddr(DAG, MF, Chain, LROp, FPOp, SPDiff,
3575 isPPC64, isDarwinABI, dl);
3577 // Emit callseq_end just before tailcall node.
3578 Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(NumBytes, true),
3579 DAG.getIntPtrConstant(0, true), InFlag, dl);
3580 InFlag = Chain.getValue(1);
3583 // Is this global address that of a function that can be called by name? (as
3584 // opposed to something that must hold a descriptor for an indirect call).
3585 static bool isFunctionGlobalAddress(SDValue Callee) {
3586 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
3587 if (Callee.getOpcode() == ISD::GlobalTLSAddress ||
3588 Callee.getOpcode() == ISD::TargetGlobalTLSAddress)
3591 return G->getGlobal()->getType()->getElementType()->isFunctionTy();
3598 unsigned PrepareCall(SelectionDAG &DAG, SDValue &Callee, SDValue &InFlag,
3599 SDValue &Chain, SDLoc dl, int SPDiff, bool isTailCall,
3601 SmallVectorImpl<std::pair<unsigned, SDValue> > &RegsToPass,
3602 SmallVectorImpl<SDValue> &Ops, std::vector<EVT> &NodeTys,
3603 const PPCSubtarget &Subtarget) {
3605 bool isPPC64 = Subtarget.isPPC64();
3606 bool isSVR4ABI = Subtarget.isSVR4ABI();
3607 bool isELFv2ABI = Subtarget.isELFv2ABI();
3609 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
3610 NodeTys.push_back(MVT::Other); // Returns a chain
3611 NodeTys.push_back(MVT::Glue); // Returns a flag for retval copy to use.
3613 unsigned CallOpc = PPCISD::CALL;
3615 bool needIndirectCall = true;
3616 if (!isSVR4ABI || !isPPC64)
3617 if (SDNode *Dest = isBLACompatibleAddress(Callee, DAG)) {
3618 // If this is an absolute destination address, use the munged value.
3619 Callee = SDValue(Dest, 0);
3620 needIndirectCall = false;
3623 if (isFunctionGlobalAddress(Callee)) {
3624 GlobalAddressSDNode *G = cast<GlobalAddressSDNode>(Callee);
3625 // A call to a TLS address is actually an indirect call to a
3626 // thread-specific pointer.
3627 unsigned OpFlags = 0;
3628 if ((DAG.getTarget().getRelocationModel() != Reloc::Static &&
3629 (Subtarget.getTargetTriple().isMacOSX() &&
3630 Subtarget.getTargetTriple().isMacOSXVersionLT(10, 5)) &&
3631 (G->getGlobal()->isDeclaration() ||
3632 G->getGlobal()->isWeakForLinker())) ||
3633 (Subtarget.isTargetELF() && !isPPC64 &&
3634 !G->getGlobal()->hasLocalLinkage() &&
3635 DAG.getTarget().getRelocationModel() == Reloc::PIC_)) {
3636 // PC-relative references to external symbols should go through $stub,
3637 // unless we're building with the leopard linker or later, which
3638 // automatically synthesizes these stubs.
3639 OpFlags = PPCII::MO_PLT_OR_STUB;
3642 // If the callee is a GlobalAddress/ExternalSymbol node (quite common,
3643 // every direct call is) turn it into a TargetGlobalAddress /
3644 // TargetExternalSymbol node so that legalize doesn't hack it.
3645 Callee = DAG.getTargetGlobalAddress(G->getGlobal(), dl,
3646 Callee.getValueType(), 0, OpFlags);
3647 needIndirectCall = false;
3650 if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) {
3651 unsigned char OpFlags = 0;
3653 if ((DAG.getTarget().getRelocationModel() != Reloc::Static &&
3654 (Subtarget.getTargetTriple().isMacOSX() &&
3655 Subtarget.getTargetTriple().isMacOSXVersionLT(10, 5))) ||
3656 (Subtarget.isTargetELF() && !isPPC64 &&
3657 DAG.getTarget().getRelocationModel() == Reloc::PIC_)) {
3658 // PC-relative references to external symbols should go through $stub,
3659 // unless we're building with the leopard linker or later, which
3660 // automatically synthesizes these stubs.
3661 OpFlags = PPCII::MO_PLT_OR_STUB;
3664 Callee = DAG.getTargetExternalSymbol(S->getSymbol(), Callee.getValueType(),
3666 needIndirectCall = false;
3670 // We'll form an invalid direct call when lowering a patchpoint; the full
3671 // sequence for an indirect call is complicated, and many of the
3672 // instructions introduced might have side effects (and, thus, can't be
3673 // removed later). The call itself will be removed as soon as the
3674 // argument/return lowering is complete, so the fact that it has the wrong
3675 // kind of operands should not really matter.
3676 needIndirectCall = false;
3679 if (needIndirectCall) {
3680 // Otherwise, this is an indirect call. We have to use a MTCTR/BCTRL pair
3681 // to do the call, we can't use PPCISD::CALL.
3682 SDValue MTCTROps[] = {Chain, Callee, InFlag};
3684 if (isSVR4ABI && isPPC64 && !isELFv2ABI) {
3685 // Function pointers in the 64-bit SVR4 ABI do not point to the function
3686 // entry point, but to the function descriptor (the function entry point
3687 // address is part of the function descriptor though).
3688 // The function descriptor is a three doubleword structure with the
3689 // following fields: function entry point, TOC base address and
3690 // environment pointer.
3691 // Thus for a call through a function pointer, the following actions need
3693 // 1. Save the TOC of the caller in the TOC save area of its stack
3694 // frame (this is done in LowerCall_Darwin() or LowerCall_64SVR4()).
3695 // 2. Load the address of the function entry point from the function
3697 // 3. Load the TOC of the callee from the function descriptor into r2.
3698 // 4. Load the environment pointer from the function descriptor into
3700 // 5. Branch to the function entry point address.
3701 // 6. On return of the callee, the TOC of the caller needs to be
3702 // restored (this is done in FinishCall()).
3704 // All those operations are flagged together to ensure that no other
3705 // operations can be scheduled in between. E.g. without flagging the
3706 // operations together, a TOC access in the caller could be scheduled
3707 // between the load of the callee TOC and the branch to the callee, which
3708 // results in the TOC access going through the TOC of the callee instead
3709 // of going through the TOC of the caller, which leads to incorrect code.
3711 // Load the address of the function entry point from the function
3713 SDVTList VTs = DAG.getVTList(MVT::i64, MVT::Other, MVT::Glue);
3714 SDValue LoadFuncPtr = DAG.getNode(PPCISD::LOAD, dl, VTs,
3715 makeArrayRef(MTCTROps, InFlag.getNode() ? 3 : 2));
3716 Chain = LoadFuncPtr.getValue(1);
3717 InFlag = LoadFuncPtr.getValue(2);
3719 // Load environment pointer into r11.
3720 // Offset of the environment pointer within the function descriptor.
3721 SDValue PtrOff = DAG.getIntPtrConstant(16);
3723 SDValue AddPtr = DAG.getNode(ISD::ADD, dl, MVT::i64, Callee, PtrOff);
3724 SDValue LoadEnvPtr = DAG.getNode(PPCISD::LOAD, dl, VTs, Chain, AddPtr,
3726 Chain = LoadEnvPtr.getValue(1);
3727 InFlag = LoadEnvPtr.getValue(2);
3729 SDValue EnvVal = DAG.getCopyToReg(Chain, dl, PPC::X11, LoadEnvPtr,
3731 Chain = EnvVal.getValue(0);
3732 InFlag = EnvVal.getValue(1);
3734 // Load TOC of the callee into r2. We are using a target-specific load
3735 // with r2 hard coded, because the result of a target-independent load
3736 // would never go directly into r2, since r2 is a reserved register (which
3737 // prevents the register allocator from allocating it), resulting in an
3738 // additional register being allocated and an unnecessary move instruction
3740 VTs = DAG.getVTList(MVT::Other, MVT::Glue);
3741 SDValue TOCOff = DAG.getIntPtrConstant(8);
3742 SDValue AddTOC = DAG.getNode(ISD::ADD, dl, MVT::i64, Callee, TOCOff);
3743 SDValue LoadTOCPtr = DAG.getNode(PPCISD::LOAD_TOC, dl, VTs, Chain,
3745 Chain = LoadTOCPtr.getValue(0);
3746 InFlag = LoadTOCPtr.getValue(1);
3748 MTCTROps[0] = Chain;
3749 MTCTROps[1] = LoadFuncPtr;
3750 MTCTROps[2] = InFlag;
3753 Chain = DAG.getNode(PPCISD::MTCTR, dl, NodeTys,
3754 makeArrayRef(MTCTROps, InFlag.getNode() ? 3 : 2));
3755 InFlag = Chain.getValue(1);
3758 NodeTys.push_back(MVT::Other);
3759 NodeTys.push_back(MVT::Glue);
3760 Ops.push_back(Chain);
3761 CallOpc = PPCISD::BCTRL;
3762 Callee.setNode(nullptr);
3763 // Add use of X11 (holding environment pointer)
3764 if (isSVR4ABI && isPPC64 && !isELFv2ABI)
3765 Ops.push_back(DAG.getRegister(PPC::X11, PtrVT));
3766 // Add CTR register as callee so a bctr can be emitted later.
3768 Ops.push_back(DAG.getRegister(isPPC64 ? PPC::CTR8 : PPC::CTR, PtrVT));
3771 // If this is a direct call, pass the chain and the callee.
3772 if (Callee.getNode()) {
3773 Ops.push_back(Chain);
3774 Ops.push_back(Callee);
3776 // If this is a call to __tls_get_addr, find the symbol whose address
3777 // is to be taken and add it to the list. This will be used to
3778 // generate __tls_get_addr(<sym>@tlsgd) or __tls_get_addr(<sym>@tlsld).
3779 // We find the symbol by walking the chain to the CopyFromReg, walking
3780 // back from the CopyFromReg to the ADDI_TLSGD_L or ADDI_TLSLD_L, and
3781 // pulling the symbol from that node.
3782 if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee))
3783 if (!strcmp(S->getSymbol(), "__tls_get_addr")) {
3784 assert(!needIndirectCall && "Indirect call to __tls_get_addr???");
3785 SDNode *AddI = Chain.getNode()->getOperand(2).getNode();
3786 SDValue TGTAddr = AddI->getOperand(1);
3787 assert(TGTAddr.getNode()->getOpcode() == ISD::TargetGlobalTLSAddress &&
3788 "Didn't find target global TLS address where we expected one");
3789 Ops.push_back(TGTAddr);
3790 CallOpc = PPCISD::CALL_TLS;
3793 // If this is a tail call add stack pointer delta.
3795 Ops.push_back(DAG.getConstant(SPDiff, MVT::i32));
3797 // Add argument registers to the end of the list so that they are known live
3799 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
3800 Ops.push_back(DAG.getRegister(RegsToPass[i].first,
3801 RegsToPass[i].second.getValueType()));
3803 // Direct calls in the ELFv2 ABI need the TOC register live into the call.
3804 if (Callee.getNode() && isELFv2ABI && !IsPatchPoint)
3805 Ops.push_back(DAG.getRegister(PPC::X2, PtrVT));
3811 bool isLocalCall(const SDValue &Callee)
3813 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee))
3814 return !G->getGlobal()->isDeclaration() &&
3815 !G->getGlobal()->isWeakForLinker();
3820 PPCTargetLowering::LowerCallResult(SDValue Chain, SDValue InFlag,
3821 CallingConv::ID CallConv, bool isVarArg,
3822 const SmallVectorImpl<ISD::InputArg> &Ins,
3823 SDLoc dl, SelectionDAG &DAG,
3824 SmallVectorImpl<SDValue> &InVals) const {
3826 SmallVector<CCValAssign, 16> RVLocs;
3827 CCState CCRetInfo(CallConv, isVarArg, DAG.getMachineFunction(), RVLocs,
3829 CCRetInfo.AnalyzeCallResult(Ins, RetCC_PPC);
3831 // Copy all of the result registers out of their specified physreg.
3832 for (unsigned i = 0, e = RVLocs.size(); i != e; ++i) {
3833 CCValAssign &VA = RVLocs[i];
3834 assert(VA.isRegLoc() && "Can only return in registers!");
3836 SDValue Val = DAG.getCopyFromReg(Chain, dl,
3837 VA.getLocReg(), VA.getLocVT(), InFlag);
3838 Chain = Val.getValue(1);
3839 InFlag = Val.getValue(2);
3841 switch (VA.getLocInfo()) {
3842 default: llvm_unreachable("Unknown loc info!");
3843 case CCValAssign::Full: break;
3844 case CCValAssign::AExt:
3845 Val = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), Val);
3847 case CCValAssign::ZExt:
3848 Val = DAG.getNode(ISD::AssertZext, dl, VA.getLocVT(), Val,
3849 DAG.getValueType(VA.getValVT()));
3850 Val = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), Val);
3852 case CCValAssign::SExt:
3853 Val = DAG.getNode(ISD::AssertSext, dl, VA.getLocVT(), Val,
3854 DAG.getValueType(VA.getValVT()));
3855 Val = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), Val);
3859 InVals.push_back(Val);
3866 PPCTargetLowering::FinishCall(CallingConv::ID CallConv, SDLoc dl,
3867 bool isTailCall, bool isVarArg, bool IsPatchPoint,
3869 SmallVector<std::pair<unsigned, SDValue>, 8>
3871 SDValue InFlag, SDValue Chain,
3873 int SPDiff, unsigned NumBytes,
3874 const SmallVectorImpl<ISD::InputArg> &Ins,
3875 SmallVectorImpl<SDValue> &InVals) const {
3877 bool isELFv2ABI = Subtarget.isELFv2ABI();
3878 std::vector<EVT> NodeTys;
3879 SmallVector<SDValue, 8> Ops;
3880 unsigned CallOpc = PrepareCall(DAG, Callee, InFlag, Chain, dl, SPDiff,
3881 isTailCall, IsPatchPoint, RegsToPass, Ops,
3882 NodeTys, Subtarget);
3884 // Add implicit use of CR bit 6 for 32-bit SVR4 vararg calls
3885 if (isVarArg && Subtarget.isSVR4ABI() && !Subtarget.isPPC64())
3886 Ops.push_back(DAG.getRegister(PPC::CR1EQ, MVT::i32));
3888 // When performing tail call optimization the callee pops its arguments off
3889 // the stack. Account for this here so these bytes can be pushed back on in
3890 // PPCFrameLowering::eliminateCallFramePseudoInstr.
3891 int BytesCalleePops =
3892 (CallConv == CallingConv::Fast &&
3893 getTargetMachine().Options.GuaranteedTailCallOpt) ? NumBytes : 0;
3895 // Add a register mask operand representing the call-preserved registers.
3896 const TargetRegisterInfo *TRI =
3897 getTargetMachine().getSubtargetImpl()->getRegisterInfo();
3898 const uint32_t *Mask = TRI->getCallPreservedMask(CallConv);
3899 assert(Mask && "Missing call preserved mask for calling convention");
3900 Ops.push_back(DAG.getRegisterMask(Mask));
3902 if (InFlag.getNode())
3903 Ops.push_back(InFlag);
3907 assert(((Callee.getOpcode() == ISD::Register &&
3908 cast<RegisterSDNode>(Callee)->getReg() == PPC::CTR) ||
3909 Callee.getOpcode() == ISD::TargetExternalSymbol ||
3910 Callee.getOpcode() == ISD::TargetGlobalAddress ||
3911 isa<ConstantSDNode>(Callee)) &&
3912 "Expecting an global address, external symbol, absolute value or register");
3914 return DAG.getNode(PPCISD::TC_RETURN, dl, MVT::Other, Ops);
3917 // Add a NOP immediately after the branch instruction when using the 64-bit
3918 // SVR4 ABI. At link time, if caller and callee are in a different module and
3919 // thus have a different TOC, the call will be replaced with a call to a stub
3920 // function which saves the current TOC, loads the TOC of the callee and
3921 // branches to the callee. The NOP will be replaced with a load instruction
3922 // which restores the TOC of the caller from the TOC save slot of the current
3923 // stack frame. If caller and callee belong to the same module (and have the
3924 // same TOC), the NOP will remain unchanged.
3926 if (!isTailCall && Subtarget.isSVR4ABI()&& Subtarget.isPPC64() &&
3928 if (CallOpc == PPCISD::BCTRL) {
3929 // This is a call through a function pointer.
3930 // Restore the caller TOC from the save area into R2.
3931 // See PrepareCall() for more information about calls through function
3932 // pointers in the 64-bit SVR4 ABI.
3933 // We are using a target-specific load with r2 hard coded, because the
3934 // result of a target-independent load would never go directly into r2,
3935 // since r2 is a reserved register (which prevents the register allocator
3936 // from allocating it), resulting in an additional register being
3937 // allocated and an unnecessary move instruction being generated.
3938 CallOpc = PPCISD::BCTRL_LOAD_TOC;
3940 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
3941 SDValue StackPtr = DAG.getRegister(PPC::X1, PtrVT);
3942 unsigned TOCSaveOffset = PPCFrameLowering::getTOCSaveOffset(isELFv2ABI);
3943 SDValue TOCOff = DAG.getIntPtrConstant(TOCSaveOffset);
3944 SDValue AddTOC = DAG.getNode(ISD::ADD, dl, MVT::i64, StackPtr, TOCOff);
3946 // The address needs to go after the chain input but before the flag (or
3947 // any other variadic arguments).
3948 Ops.insert(std::next(Ops.begin()), AddTOC);
3949 } else if ((CallOpc == PPCISD::CALL) &&
3950 (!isLocalCall(Callee) ||
3951 DAG.getTarget().getRelocationModel() == Reloc::PIC_)) {
3952 // Otherwise insert NOP for non-local calls.
3953 CallOpc = PPCISD::CALL_NOP;
3954 } else if (CallOpc == PPCISD::CALL_TLS)
3955 // For 64-bit SVR4, TLS calls are always non-local.
3956 CallOpc = PPCISD::CALL_NOP_TLS;
3959 Chain = DAG.getNode(CallOpc, dl, NodeTys, Ops);
3960 InFlag = Chain.getValue(1);
3962 Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(NumBytes, true),
3963 DAG.getIntPtrConstant(BytesCalleePops, true),
3966 InFlag = Chain.getValue(1);
3968 return LowerCallResult(Chain, InFlag, CallConv, isVarArg,
3969 Ins, dl, DAG, InVals);
3973 PPCTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI,
3974 SmallVectorImpl<SDValue> &InVals) const {
3975 SelectionDAG &DAG = CLI.DAG;
3977 SmallVectorImpl<ISD::OutputArg> &Outs = CLI.Outs;
3978 SmallVectorImpl<SDValue> &OutVals = CLI.OutVals;
3979 SmallVectorImpl<ISD::InputArg> &Ins = CLI.Ins;
3980 SDValue Chain = CLI.Chain;
3981 SDValue Callee = CLI.Callee;
3982 bool &isTailCall = CLI.IsTailCall;
3983 CallingConv::ID CallConv = CLI.CallConv;
3984 bool isVarArg = CLI.IsVarArg;
3985 bool IsPatchPoint = CLI.IsPatchPoint;
3988 isTailCall = IsEligibleForTailCallOptimization(Callee, CallConv, isVarArg,
3991 if (!isTailCall && CLI.CS && CLI.CS->isMustTailCall())
3992 report_fatal_error("failed to perform tail call elimination on a call "
3993 "site marked musttail");
3995 if (Subtarget.isSVR4ABI()) {
3996 if (Subtarget.isPPC64())
3997 return LowerCall_64SVR4(Chain, Callee, CallConv, isVarArg,
3998 isTailCall, IsPatchPoint, Outs, OutVals, Ins,
4001 return LowerCall_32SVR4(Chain, Callee, CallConv, isVarArg,
4002 isTailCall, IsPatchPoint, Outs, OutVals, Ins,
4006 return LowerCall_Darwin(Chain, Callee, CallConv, isVarArg,
4007 isTailCall, IsPatchPoint, Outs, OutVals, Ins,
4012 PPCTargetLowering::LowerCall_32SVR4(SDValue Chain, SDValue Callee,
4013 CallingConv::ID CallConv, bool isVarArg,
4014 bool isTailCall, bool IsPatchPoint,
4015 const SmallVectorImpl<ISD::OutputArg> &Outs,
4016 const SmallVectorImpl<SDValue> &OutVals,
4017 const SmallVectorImpl<ISD::InputArg> &Ins,
4018 SDLoc dl, SelectionDAG &DAG,
4019 SmallVectorImpl<SDValue> &InVals) const {
4020 // See PPCTargetLowering::LowerFormalArguments_32SVR4() for a description
4021 // of the 32-bit SVR4 ABI stack frame layout.
4023 assert((CallConv == CallingConv::C ||
4024 CallConv == CallingConv::Fast) && "Unknown calling convention!");
4026 unsigned PtrByteSize = 4;
4028 MachineFunction &MF = DAG.getMachineFunction();
4030 // Mark this function as potentially containing a function that contains a
4031 // tail call. As a consequence the frame pointer will be used for dynamicalloc
4032 // and restoring the callers stack pointer in this functions epilog. This is
4033 // done because by tail calling the called function might overwrite the value
4034 // in this function's (MF) stack pointer stack slot 0(SP).
4035 if (getTargetMachine().Options.GuaranteedTailCallOpt &&
4036 CallConv == CallingConv::Fast)
4037 MF.getInfo<PPCFunctionInfo>()->setHasFastCall();
4039 // Count how many bytes are to be pushed on the stack, including the linkage
4040 // area, parameter list area and the part of the local variable space which
4041 // contains copies of aggregates which are passed by value.
4043 // Assign locations to all of the outgoing arguments.
4044 SmallVector<CCValAssign, 16> ArgLocs;
4045 CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(), ArgLocs,
4048 // Reserve space for the linkage area on the stack.
4049 CCInfo.AllocateStack(PPCFrameLowering::getLinkageSize(false, false, false),
4053 // Handle fixed and variable vector arguments differently.
4054 // Fixed vector arguments go into registers as long as registers are
4055 // available. Variable vector arguments always go into memory.
4056 unsigned NumArgs = Outs.size();
4058 for (unsigned i = 0; i != NumArgs; ++i) {
4059 MVT ArgVT = Outs[i].VT;
4060 ISD::ArgFlagsTy ArgFlags = Outs[i].Flags;
4063 if (Outs[i].IsFixed) {
4064 Result = CC_PPC32_SVR4(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags,
4067 Result = CC_PPC32_SVR4_VarArg(i, ArgVT, ArgVT, CCValAssign::Full,
4073 errs() << "Call operand #" << i << " has unhandled type "
4074 << EVT(ArgVT).getEVTString() << "\n";
4076 llvm_unreachable(nullptr);
4080 // All arguments are treated the same.
4081 CCInfo.AnalyzeCallOperands(Outs, CC_PPC32_SVR4);
4084 // Assign locations to all of the outgoing aggregate by value arguments.
4085 SmallVector<CCValAssign, 16> ByValArgLocs;
4086 CCState CCByValInfo(CallConv, isVarArg, DAG.getMachineFunction(),
4087 ByValArgLocs, *DAG.getContext());
4089 // Reserve stack space for the allocations in CCInfo.
4090 CCByValInfo.AllocateStack(CCInfo.getNextStackOffset(), PtrByteSize);
4092 CCByValInfo.AnalyzeCallOperands(Outs, CC_PPC32_SVR4_ByVal);
4094 // Size of the linkage area, parameter list area and the part of the local
4095 // space variable where copies of aggregates which are passed by value are
4097 unsigned NumBytes = CCByValInfo.getNextStackOffset();
4099 // Calculate by how many bytes the stack has to be adjusted in case of tail
4100 // call optimization.
4101 int SPDiff = CalculateTailCallSPDiff(DAG, isTailCall, NumBytes);
4103 // Adjust the stack pointer for the new arguments...
4104 // These operations are automatically eliminated by the prolog/epilog pass
4105 Chain = DAG.getCALLSEQ_START(Chain, DAG.getIntPtrConstant(NumBytes, true),
4107 SDValue CallSeqStart = Chain;
4109 // Load the return address and frame pointer so it can be moved somewhere else
4112 Chain = EmitTailCallLoadFPAndRetAddr(DAG, SPDiff, Chain, LROp, FPOp, false,
4115 // Set up a copy of the stack pointer for use loading and storing any
4116 // arguments that may not fit in the registers available for argument
4118 SDValue StackPtr = DAG.getRegister(PPC::R1, MVT::i32);
4120 SmallVector<std::pair<unsigned, SDValue>, 8> RegsToPass;
4121 SmallVector<TailCallArgumentInfo, 8> TailCallArguments;
4122 SmallVector<SDValue, 8> MemOpChains;
4124 bool seenFloatArg = false;
4125 // Walk the register/memloc assignments, inserting copies/loads.
4126 for (unsigned i = 0, j = 0, e = ArgLocs.size();
4129 CCValAssign &VA = ArgLocs[i];
4130 SDValue Arg = OutVals[i];
4131 ISD::ArgFlagsTy Flags = Outs[i].Flags;
4133 if (Flags.isByVal()) {
4134 // Argument is an aggregate which is passed by value, thus we need to
4135 // create a copy of it in the local variable space of the current stack
4136 // frame (which is the stack frame of the caller) and pass the address of
4137 // this copy to the callee.
4138 assert((j < ByValArgLocs.size()) && "Index out of bounds!");
4139 CCValAssign &ByValVA = ByValArgLocs[j++];
4140 assert((VA.getValNo() == ByValVA.getValNo()) && "ValNo mismatch!");
4142 // Memory reserved in the local variable space of the callers stack frame.
4143 unsigned LocMemOffset = ByValVA.getLocMemOffset();
4145 SDValue PtrOff = DAG.getIntPtrConstant(LocMemOffset);
4146 PtrOff = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr, PtrOff);
4148 // Create a copy of the argument in the local area of the current
4150 SDValue MemcpyCall =
4151 CreateCopyOfByValArgument(Arg, PtrOff,
4152 CallSeqStart.getNode()->getOperand(0),
4155 // This must go outside the CALLSEQ_START..END.
4156 SDValue NewCallSeqStart = DAG.getCALLSEQ_START(MemcpyCall,
4157 CallSeqStart.getNode()->getOperand(1),
4159 DAG.ReplaceAllUsesWith(CallSeqStart.getNode(),
4160 NewCallSeqStart.getNode());
4161 Chain = CallSeqStart = NewCallSeqStart;
4163 // Pass the address of the aggregate copy on the stack either in a
4164 // physical register or in the parameter list area of the current stack
4165 // frame to the callee.
4169 if (VA.isRegLoc()) {
4170 if (Arg.getValueType() == MVT::i1)
4171 Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, Arg);
4173 seenFloatArg |= VA.getLocVT().isFloatingPoint();
4174 // Put argument in a physical register.
4175 RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
4177 // Put argument in the parameter list area of the current stack frame.
4178 assert(VA.isMemLoc());
4179 unsigned LocMemOffset = VA.getLocMemOffset();
4182 SDValue PtrOff = DAG.getIntPtrConstant(LocMemOffset);
4183 PtrOff = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr, PtrOff);
4185 MemOpChains.push_back(DAG.getStore(Chain, dl, Arg, PtrOff,
4186 MachinePointerInfo(),
4189 // Calculate and remember argument location.
4190 CalculateTailCallArgDest(DAG, MF, false, Arg, SPDiff, LocMemOffset,
4196 if (!MemOpChains.empty())
4197 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOpChains);
4199 // Build a sequence of copy-to-reg nodes chained together with token chain
4200 // and flag operands which copy the outgoing args into the appropriate regs.
4202 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
4203 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
4204 RegsToPass[i].second, InFlag);
4205 InFlag = Chain.getValue(1);
4208 // Set CR bit 6 to true if this is a vararg call with floating args passed in
4211 SDVTList VTs = DAG.getVTList(MVT::Other, MVT::Glue);
4212 SDValue Ops[] = { Chain, InFlag };
4214 Chain = DAG.getNode(seenFloatArg ? PPCISD::CR6SET : PPCISD::CR6UNSET,
4215 dl, VTs, makeArrayRef(Ops, InFlag.getNode() ? 2 : 1));
4217 InFlag = Chain.getValue(1);
4221 PrepareTailCall(DAG, InFlag, Chain, dl, false, SPDiff, NumBytes, LROp, FPOp,
4222 false, TailCallArguments);
4224 return FinishCall(CallConv, dl, isTailCall, isVarArg, IsPatchPoint, DAG,
4225 RegsToPass, InFlag, Chain, Callee, SPDiff, NumBytes,
4229 // Copy an argument into memory, being careful to do this outside the
4230 // call sequence for the call to which the argument belongs.
4232 PPCTargetLowering::createMemcpyOutsideCallSeq(SDValue Arg, SDValue PtrOff,
4233 SDValue CallSeqStart,
4234 ISD::ArgFlagsTy Flags,
4237 SDValue MemcpyCall = CreateCopyOfByValArgument(Arg, PtrOff,
4238 CallSeqStart.getNode()->getOperand(0),
4240 // The MEMCPY must go outside the CALLSEQ_START..END.
4241 SDValue NewCallSeqStart = DAG.getCALLSEQ_START(MemcpyCall,
4242 CallSeqStart.getNode()->getOperand(1),
4244 DAG.ReplaceAllUsesWith(CallSeqStart.getNode(),
4245 NewCallSeqStart.getNode());
4246 return NewCallSeqStart;
4250 PPCTargetLowering::LowerCall_64SVR4(SDValue Chain, SDValue Callee,
4251 CallingConv::ID CallConv, bool isVarArg,
4252 bool isTailCall, bool IsPatchPoint,
4253 const SmallVectorImpl<ISD::OutputArg> &Outs,
4254 const SmallVectorImpl<SDValue> &OutVals,
4255 const SmallVectorImpl<ISD::InputArg> &Ins,
4256 SDLoc dl, SelectionDAG &DAG,
4257 SmallVectorImpl<SDValue> &InVals) const {
4259 bool isELFv2ABI = Subtarget.isELFv2ABI();
4260 bool isLittleEndian = Subtarget.isLittleEndian();
4261 unsigned NumOps = Outs.size();
4263 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
4264 unsigned PtrByteSize = 8;
4266 MachineFunction &MF = DAG.getMachineFunction();
4268 // Mark this function as potentially containing a function that contains a
4269 // tail call. As a consequence the frame pointer will be used for dynamicalloc
4270 // and restoring the callers stack pointer in this functions epilog. This is
4271 // done because by tail calling the called function might overwrite the value
4272 // in this function's (MF) stack pointer stack slot 0(SP).
4273 if (getTargetMachine().Options.GuaranteedTailCallOpt &&
4274 CallConv == CallingConv::Fast)
4275 MF.getInfo<PPCFunctionInfo>()->setHasFastCall();
4277 // Count how many bytes are to be pushed on the stack, including the linkage
4278 // area, and parameter passing area. On ELFv1, the linkage area is 48 bytes
4279 // reserved space for [SP][CR][LR][2 x unused][TOC]; on ELFv2, the linkage
4280 // area is 32 bytes reserved space for [SP][CR][LR][TOC].
4281 unsigned LinkageSize = PPCFrameLowering::getLinkageSize(true, false,
4283 unsigned NumBytes = LinkageSize;
4285 // Add up all the space actually used.
4286 for (unsigned i = 0; i != NumOps; ++i) {
4287 ISD::ArgFlagsTy Flags = Outs[i].Flags;
4288 EVT ArgVT = Outs[i].VT;
4289 EVT OrigVT = Outs[i].ArgVT;
4291 /* Respect alignment of argument on the stack. */
4293 CalculateStackSlotAlignment(ArgVT, OrigVT, Flags, PtrByteSize);
4294 NumBytes = ((NumBytes + Align - 1) / Align) * Align;
4296 NumBytes += CalculateStackSlotSize(ArgVT, Flags, PtrByteSize);
4297 if (Flags.isInConsecutiveRegsLast())
4298 NumBytes = ((NumBytes + PtrByteSize - 1)/PtrByteSize) * PtrByteSize;
4301 unsigned NumBytesActuallyUsed = NumBytes;
4303 // The prolog code of the callee may store up to 8 GPR argument registers to
4304 // the stack, allowing va_start to index over them in memory if its varargs.
4305 // Because we cannot tell if this is needed on the caller side, we have to
4306 // conservatively assume that it is needed. As such, make sure we have at
4307 // least enough stack space for the caller to store the 8 GPRs.
4308 // FIXME: On ELFv2, it may be unnecessary to allocate the parameter area.
4309 NumBytes = std::max(NumBytes, LinkageSize + 8 * PtrByteSize);
4311 // Tail call needs the stack to be aligned.
4312 if (getTargetMachine().Options.GuaranteedTailCallOpt &&
4313 CallConv == CallingConv::Fast)
4314 NumBytes = EnsureStackAlignment(MF.getTarget(), NumBytes);
4316 // Calculate by how many bytes the stack has to be adjusted in case of tail
4317 // call optimization.
4318 int SPDiff = CalculateTailCallSPDiff(DAG, isTailCall, NumBytes);
4320 // To protect arguments on the stack from being clobbered in a tail call,
4321 // force all the loads to happen before doing any other lowering.
4323 Chain = DAG.getStackArgumentTokenFactor(Chain);
4325 // Adjust the stack pointer for the new arguments...
4326 // These operations are automatically eliminated by the prolog/epilog pass
4327 Chain = DAG.getCALLSEQ_START(Chain, DAG.getIntPtrConstant(NumBytes, true),
4329 SDValue CallSeqStart = Chain;
4331 // Load the return address and frame pointer so it can be move somewhere else
4334 Chain = EmitTailCallLoadFPAndRetAddr(DAG, SPDiff, Chain, LROp, FPOp, true,
4337 // Set up a copy of the stack pointer for use loading and storing any
4338 // arguments that may not fit in the registers available for argument
4340 SDValue StackPtr = DAG.getRegister(PPC::X1, MVT::i64);
4342 // Figure out which arguments are going to go in registers, and which in
4343 // memory. Also, if this is a vararg function, floating point operations
4344 // must be stored to our stack, and loaded into integer regs as well, if
4345 // any integer regs are available for argument passing.
4346 unsigned ArgOffset = LinkageSize;
4347 unsigned GPR_idx, FPR_idx = 0, VR_idx = 0;
4349 static const MCPhysReg GPR[] = {
4350 PPC::X3, PPC::X4, PPC::X5, PPC::X6,
4351 PPC::X7, PPC::X8, PPC::X9, PPC::X10,
4353 static const MCPhysReg *FPR = GetFPR();
4355 static const MCPhysReg VR[] = {
4356 PPC::V2, PPC::V3, PPC::V4, PPC::V5, PPC::V6, PPC::V7, PPC::V8,
4357 PPC::V9, PPC::V10, PPC::V11, PPC::V12, PPC::V13
4359 static const MCPhysReg VSRH[] = {
4360 PPC::VSH2, PPC::VSH3, PPC::VSH4, PPC::VSH5, PPC::VSH6, PPC::VSH7, PPC::VSH8,
4361 PPC::VSH9, PPC::VSH10, PPC::VSH11, PPC::VSH12, PPC::VSH13
4364 const unsigned NumGPRs = array_lengthof(GPR);
4365 const unsigned NumFPRs = 13;
4366 const unsigned NumVRs = array_lengthof(VR);
4368 SmallVector<std::pair<unsigned, SDValue>, 8> RegsToPass;
4369 SmallVector<TailCallArgumentInfo, 8> TailCallArguments;
4371 SmallVector<SDValue, 8> MemOpChains;
4372 for (unsigned i = 0; i != NumOps; ++i) {
4373 SDValue Arg = OutVals[i];
4374 ISD::ArgFlagsTy Flags = Outs[i].Flags;
4375 EVT ArgVT = Outs[i].VT;
4376 EVT OrigVT = Outs[i].ArgVT;
4378 /* Respect alignment of argument on the stack. */
4380 CalculateStackSlotAlignment(ArgVT, OrigVT, Flags, PtrByteSize);
4381 ArgOffset = ((ArgOffset + Align - 1) / Align) * Align;
4383 /* Compute GPR index associated with argument offset. */
4384 GPR_idx = (ArgOffset - LinkageSize) / PtrByteSize;
4385 GPR_idx = std::min(GPR_idx, NumGPRs);
4387 // PtrOff will be used to store the current argument to the stack if a
4388 // register cannot be found for it.
4391 PtrOff = DAG.getConstant(ArgOffset, StackPtr.getValueType());
4393 PtrOff = DAG.getNode(ISD::ADD, dl, PtrVT, StackPtr, PtrOff);
4395 // Promote integers to 64-bit values.
4396 if (Arg.getValueType() == MVT::i32 || Arg.getValueType() == MVT::i1) {
4397 // FIXME: Should this use ANY_EXTEND if neither sext nor zext?
4398 unsigned ExtOp = Flags.isSExt() ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND;
4399 Arg = DAG.getNode(ExtOp, dl, MVT::i64, Arg);
4402 // FIXME memcpy is used way more than necessary. Correctness first.
4403 // Note: "by value" is code for passing a structure by value, not
4405 if (Flags.isByVal()) {
4406 // Note: Size includes alignment padding, so
4407 // struct x { short a; char b; }
4408 // will have Size = 4. With #pragma pack(1), it will have Size = 3.
4409 // These are the proper values we need for right-justifying the
4410 // aggregate in a parameter register.
4411 unsigned Size = Flags.getByValSize();
4413 // An empty aggregate parameter takes up no storage and no
4418 // All aggregates smaller than 8 bytes must be passed right-justified.
4419 if (Size==1 || Size==2 || Size==4) {
4420 EVT VT = (Size==1) ? MVT::i8 : ((Size==2) ? MVT::i16 : MVT::i32);
4421 if (GPR_idx != NumGPRs) {
4422 SDValue Load = DAG.getExtLoad(ISD::EXTLOAD, dl, PtrVT, Chain, Arg,
4423 MachinePointerInfo(), VT,
4424 false, false, false, 0);
4425 MemOpChains.push_back(Load.getValue(1));
4426 RegsToPass.push_back(std::make_pair(GPR[GPR_idx], Load));
4428 ArgOffset += PtrByteSize;
4433 if (GPR_idx == NumGPRs && Size < 8) {
4434 SDValue AddPtr = PtrOff;
4435 if (!isLittleEndian) {
4436 SDValue Const = DAG.getConstant(PtrByteSize - Size,
4437 PtrOff.getValueType());
4438 AddPtr = DAG.getNode(ISD::ADD, dl, PtrVT, PtrOff, Const);
4440 Chain = CallSeqStart = createMemcpyOutsideCallSeq(Arg, AddPtr,
4443 ArgOffset += PtrByteSize;
4446 // Copy entire object into memory. There are cases where gcc-generated
4447 // code assumes it is there, even if it could be put entirely into
4448 // registers. (This is not what the doc says.)
4450 // FIXME: The above statement is likely due to a misunderstanding of the
4451 // documents. All arguments must be copied into the parameter area BY
4452 // THE CALLEE in the event that the callee takes the address of any
4453 // formal argument. That has not yet been implemented. However, it is
4454 // reasonable to use the stack area as a staging area for the register
4457 // Skip this for small aggregates, as we will use the same slot for a
4458 // right-justified copy, below.
4460 Chain = CallSeqStart = createMemcpyOutsideCallSeq(Arg, PtrOff,
4464 // When a register is available, pass a small aggregate right-justified.
4465 if (Size < 8 && GPR_idx != NumGPRs) {
4466 // The easiest way to get this right-justified in a register
4467 // is to copy the structure into the rightmost portion of a
4468 // local variable slot, then load the whole slot into the
4470 // FIXME: The memcpy seems to produce pretty awful code for
4471 // small aggregates, particularly for packed ones.
4472 // FIXME: It would be preferable to use the slot in the
4473 // parameter save area instead of a new local variable.
4474 SDValue AddPtr = PtrOff;
4475 if (!isLittleEndian) {
4476 SDValue Const = DAG.getConstant(8 - Size, PtrOff.getValueType());
4477 AddPtr = DAG.getNode(ISD::ADD, dl, PtrVT, PtrOff, Const);
4479 Chain = CallSeqStart = createMemcpyOutsideCallSeq(Arg, AddPtr,
4483 // Load the slot into the register.
4484 SDValue Load = DAG.getLoad(PtrVT, dl, Chain, PtrOff,
4485 MachinePointerInfo(),
4486 false, false, false, 0);
4487 MemOpChains.push_back(Load.getValue(1));
4488 RegsToPass.push_back(std::make_pair(GPR[GPR_idx], Load));
4490 // Done with this argument.
4491 ArgOffset += PtrByteSize;
4495 // For aggregates larger than PtrByteSize, copy the pieces of the
4496 // object that fit into registers from the parameter save area.
4497 for (unsigned j=0; j<Size; j+=PtrByteSize) {
4498 SDValue Const = DAG.getConstant(j, PtrOff.getValueType());
4499 SDValue AddArg = DAG.getNode(ISD::ADD, dl, PtrVT, Arg, Const);
4500 if (GPR_idx != NumGPRs) {
4501 SDValue Load = DAG.getLoad(PtrVT, dl, Chain, AddArg,
4502 MachinePointerInfo(),
4503 false, false, false, 0);
4504 MemOpChains.push_back(Load.getValue(1));
4505 RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], Load));
4506 ArgOffset += PtrByteSize;
4508 ArgOffset += ((Size - j + PtrByteSize-1)/PtrByteSize)*PtrByteSize;
4515 switch (Arg.getSimpleValueType().SimpleTy) {
4516 default: llvm_unreachable("Unexpected ValueType for argument!");
4520 // These can be scalar arguments or elements of an integer array type
4521 // passed directly. Clang may use those instead of "byval" aggregate
4522 // types to avoid forcing arguments to memory unnecessarily.
4523 if (GPR_idx != NumGPRs) {
4524 RegsToPass.push_back(std::make_pair(GPR[GPR_idx], Arg));
4526 LowerMemOpCallTo(DAG, MF, Chain, Arg, PtrOff, SPDiff, ArgOffset,
4527 true, isTailCall, false, MemOpChains,
4528 TailCallArguments, dl);
4530 ArgOffset += PtrByteSize;
4534 // These can be scalar arguments or elements of a float array type
4535 // passed directly. The latter are used to implement ELFv2 homogenous
4536 // float aggregates.
4538 // Named arguments go into FPRs first, and once they overflow, the
4539 // remaining arguments go into GPRs and then the parameter save area.
4540 // Unnamed arguments for vararg functions always go to GPRs and
4541 // then the parameter save area. For now, put all arguments to vararg
4542 // routines always in both locations (FPR *and* GPR or stack slot).
4543 bool NeedGPROrStack = isVarArg || FPR_idx == NumFPRs;
4545 // First load the argument into the next available FPR.
4546 if (FPR_idx != NumFPRs)
4547 RegsToPass.push_back(std::make_pair(FPR[FPR_idx++], Arg));
4549 // Next, load the argument into GPR or stack slot if needed.
4550 if (!NeedGPROrStack)
4552 else if (GPR_idx != NumGPRs) {
4553 // In the non-vararg case, this can only ever happen in the
4554 // presence of f32 array types, since otherwise we never run
4555 // out of FPRs before running out of GPRs.
4558 // Double values are always passed in a single GPR.
4559 if (Arg.getValueType() != MVT::f32) {
4560 ArgVal = DAG.getNode(ISD::BITCAST, dl, MVT::i64, Arg);
4562 // Non-array float values are extended and passed in a GPR.
4563 } else if (!Flags.isInConsecutiveRegs()) {
4564 ArgVal = DAG.getNode(ISD::BITCAST, dl, MVT::i32, Arg);
4565 ArgVal = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i64, ArgVal);
4567 // If we have an array of floats, we collect every odd element
4568 // together with its predecessor into one GPR.
4569 } else if (ArgOffset % PtrByteSize != 0) {
4571 Lo = DAG.getNode(ISD::BITCAST, dl, MVT::i32, OutVals[i - 1]);
4572 Hi = DAG.getNode(ISD::BITCAST, dl, MVT::i32, Arg);
4573 if (!isLittleEndian)
4575 ArgVal = DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Lo, Hi);
4577 // The final element, if even, goes into the first half of a GPR.
4578 } else if (Flags.isInConsecutiveRegsLast()) {
4579 ArgVal = DAG.getNode(ISD::BITCAST, dl, MVT::i32, Arg);
4580 ArgVal = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i64, ArgVal);
4581 if (!isLittleEndian)
4582 ArgVal = DAG.getNode(ISD::SHL, dl, MVT::i64, ArgVal,
4583 DAG.getConstant(32, MVT::i32));
4585 // Non-final even elements are skipped; they will be handled
4586 // together the with subsequent argument on the next go-around.
4590 if (ArgVal.getNode())
4591 RegsToPass.push_back(std::make_pair(GPR[GPR_idx], ArgVal));
4593 // Single-precision floating-point values are mapped to the
4594 // second (rightmost) word of the stack doubleword.
4595 if (Arg.getValueType() == MVT::f32 &&
4596 !isLittleEndian && !Flags.isInConsecutiveRegs()) {
4597 SDValue ConstFour = DAG.getConstant(4, PtrOff.getValueType());
4598 PtrOff = DAG.getNode(ISD::ADD, dl, PtrVT, PtrOff, ConstFour);
4601 LowerMemOpCallTo(DAG, MF, Chain, Arg, PtrOff, SPDiff, ArgOffset,
4602 true, isTailCall, false, MemOpChains,
4603 TailCallArguments, dl);
4605 // When passing an array of floats, the array occupies consecutive
4606 // space in the argument area; only round up to the next doubleword
4607 // at the end of the array. Otherwise, each float takes 8 bytes.
4608 ArgOffset += (Arg.getValueType() == MVT::f32 &&
4609 Flags.isInConsecutiveRegs()) ? 4 : 8;
4610 if (Flags.isInConsecutiveRegsLast())
4611 ArgOffset = ((ArgOffset + PtrByteSize - 1)/PtrByteSize) * PtrByteSize;
4620 // These can be scalar arguments or elements of a vector array type
4621 // passed directly. The latter are used to implement ELFv2 homogenous
4622 // vector aggregates.
4624 // For a varargs call, named arguments go into VRs or on the stack as
4625 // usual; unnamed arguments always go to the stack or the corresponding
4626 // GPRs when within range. For now, we always put the value in both
4627 // locations (or even all three).
4629 // We could elide this store in the case where the object fits
4630 // entirely in R registers. Maybe later.
4631 SDValue Store = DAG.getStore(Chain, dl, Arg, PtrOff,
4632 MachinePointerInfo(), false, false, 0);
4633 MemOpChains.push_back(Store);
4634 if (VR_idx != NumVRs) {
4635 SDValue Load = DAG.getLoad(MVT::v4f32, dl, Store, PtrOff,
4636 MachinePointerInfo(),
4637 false, false, false, 0);
4638 MemOpChains.push_back(Load.getValue(1));
4640 unsigned VReg = (Arg.getSimpleValueType() == MVT::v2f64 ||
4641 Arg.getSimpleValueType() == MVT::v2i64) ?
4642 VSRH[VR_idx] : VR[VR_idx];
4645 RegsToPass.push_back(std::make_pair(VReg, Load));
4648 for (unsigned i=0; i<16; i+=PtrByteSize) {
4649 if (GPR_idx == NumGPRs)
4651 SDValue Ix = DAG.getNode(ISD::ADD, dl, PtrVT, PtrOff,
4652 DAG.getConstant(i, PtrVT));
4653 SDValue Load = DAG.getLoad(PtrVT, dl, Store, Ix, MachinePointerInfo(),
4654 false, false, false, 0);
4655 MemOpChains.push_back(Load.getValue(1));
4656 RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], Load));
4661 // Non-varargs Altivec params go into VRs or on the stack.
4662 if (VR_idx != NumVRs) {
4663 unsigned VReg = (Arg.getSimpleValueType() == MVT::v2f64 ||
4664 Arg.getSimpleValueType() == MVT::v2i64) ?
4665 VSRH[VR_idx] : VR[VR_idx];
4668 RegsToPass.push_back(std::make_pair(VReg, Arg));
4670 LowerMemOpCallTo(DAG, MF, Chain, Arg, PtrOff, SPDiff, ArgOffset,
4671 true, isTailCall, true, MemOpChains,
4672 TailCallArguments, dl);
4679 assert(NumBytesActuallyUsed == ArgOffset);
4680 (void)NumBytesActuallyUsed;
4682 if (!MemOpChains.empty())
4683 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOpChains);
4685 // Check if this is an indirect call (MTCTR/BCTRL).
4686 // See PrepareCall() for more information about calls through function
4687 // pointers in the 64-bit SVR4 ABI.
4688 if (!isTailCall && !IsPatchPoint &&
4689 !isFunctionGlobalAddress(Callee) &&
4690 !isa<ExternalSymbolSDNode>(Callee)) {
4691 // Load r2 into a virtual register and store it to the TOC save area.
4692 SDValue Val = DAG.getCopyFromReg(Chain, dl, PPC::X2, MVT::i64);
4693 // TOC save area offset.
4694 unsigned TOCSaveOffset = PPCFrameLowering::getTOCSaveOffset(isELFv2ABI);
4695 SDValue PtrOff = DAG.getIntPtrConstant(TOCSaveOffset);
4696 SDValue AddPtr = DAG.getNode(ISD::ADD, dl, PtrVT, StackPtr, PtrOff);
4697 Chain = DAG.getStore(Val.getValue(1), dl, Val, AddPtr, MachinePointerInfo(),
4699 // In the ELFv2 ABI, R12 must contain the address of an indirect callee.
4700 // This does not mean the MTCTR instruction must use R12; it's easier
4701 // to model this as an extra parameter, so do that.
4702 if (isELFv2ABI && !IsPatchPoint)
4703 RegsToPass.push_back(std::make_pair((unsigned)PPC::X12, Callee));
4706 // Build a sequence of copy-to-reg nodes chained together with token chain
4707 // and flag operands which copy the outgoing args into the appropriate regs.
4709 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
4710 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
4711 RegsToPass[i].second, InFlag);
4712 InFlag = Chain.getValue(1);
4716 PrepareTailCall(DAG, InFlag, Chain, dl, true, SPDiff, NumBytes, LROp,
4717 FPOp, true, TailCallArguments);
4719 return FinishCall(CallConv, dl, isTailCall, isVarArg, IsPatchPoint, DAG,
4720 RegsToPass, InFlag, Chain, Callee, SPDiff, NumBytes,
4725 PPCTargetLowering::LowerCall_Darwin(SDValue Chain, SDValue Callee,
4726 CallingConv::ID CallConv, bool isVarArg,
4727 bool isTailCall, bool IsPatchPoint,
4728 const SmallVectorImpl<ISD::OutputArg> &Outs,
4729 const SmallVectorImpl<SDValue> &OutVals,
4730 const SmallVectorImpl<ISD::InputArg> &Ins,
4731 SDLoc dl, SelectionDAG &DAG,
4732 SmallVectorImpl<SDValue> &InVals) const {
4734 unsigned NumOps = Outs.size();
4736 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
4737 bool isPPC64 = PtrVT == MVT::i64;
4738 unsigned PtrByteSize = isPPC64 ? 8 : 4;
4740 MachineFunction &MF = DAG.getMachineFunction();
4742 // Mark this function as potentially containing a function that contains a
4743 // tail call. As a consequence the frame pointer will be used for dynamicalloc
4744 // and restoring the callers stack pointer in this functions epilog. This is
4745 // done because by tail calling the called function might overwrite the value
4746 // in this function's (MF) stack pointer stack slot 0(SP).
4747 if (getTargetMachine().Options.GuaranteedTailCallOpt &&
4748 CallConv == CallingConv::Fast)
4749 MF.getInfo<PPCFunctionInfo>()->setHasFastCall();
4751 // Count how many bytes are to be pushed on the stack, including the linkage
4752 // area, and parameter passing area. We start with 24/48 bytes, which is
4753 // prereserved space for [SP][CR][LR][3 x unused].
4754 unsigned LinkageSize = PPCFrameLowering::getLinkageSize(isPPC64, true,
4756 unsigned NumBytes = LinkageSize;
4758 // Add up all the space actually used.
4759 // In 32-bit non-varargs calls, Altivec parameters all go at the end; usually
4760 // they all go in registers, but we must reserve stack space for them for
4761 // possible use by the caller. In varargs or 64-bit calls, parameters are
4762 // assigned stack space in order, with padding so Altivec parameters are
4764 unsigned nAltivecParamsAtEnd = 0;
4765 for (unsigned i = 0; i != NumOps; ++i) {
4766 ISD::ArgFlagsTy Flags = Outs[i].Flags;
4767 EVT ArgVT = Outs[i].VT;
4768 // Varargs Altivec parameters are padded to a 16 byte boundary.
4769 if (ArgVT == MVT::v4f32 || ArgVT == MVT::v4i32 ||
4770 ArgVT == MVT::v8i16 || ArgVT == MVT::v16i8 ||
4771 ArgVT == MVT::v2f64 || ArgVT == MVT::v2i64) {
4772 if (!isVarArg && !isPPC64) {
4773 // Non-varargs Altivec parameters go after all the non-Altivec
4774 // parameters; handle those later so we know how much padding we need.
4775 nAltivecParamsAtEnd++;
4778 // Varargs and 64-bit Altivec parameters are padded to 16 byte boundary.
4779 NumBytes = ((NumBytes+15)/16)*16;
4781 NumBytes += CalculateStackSlotSize(ArgVT, Flags, PtrByteSize);
4784 // Allow for Altivec parameters at the end, if needed.
4785 if (nAltivecParamsAtEnd) {
4786 NumBytes = ((NumBytes+15)/16)*16;
4787 NumBytes += 16*nAltivecParamsAtEnd;
4790 // The prolog code of the callee may store up to 8 GPR argument registers to
4791 // the stack, allowing va_start to index over them in memory if its varargs.
4792 // Because we cannot tell if this is needed on the caller side, we have to
4793 // conservatively assume that it is needed. As such, make sure we have at
4794 // least enough stack space for the caller to store the 8 GPRs.
4795 NumBytes = std::max(NumBytes, LinkageSize + 8 * PtrByteSize);
4797 // Tail call needs the stack to be aligned.
4798 if (getTargetMachine().Options.GuaranteedTailCallOpt &&
4799 CallConv == CallingConv::Fast)
4800 NumBytes = EnsureStackAlignment(MF.getTarget(), NumBytes);
4802 // Calculate by how many bytes the stack has to be adjusted in case of tail
4803 // call optimization.
4804 int SPDiff = CalculateTailCallSPDiff(DAG, isTailCall, NumBytes);
4806 // To protect arguments on the stack from being clobbered in a tail call,
4807 // force all the loads to happen before doing any other lowering.
4809 Chain = DAG.getStackArgumentTokenFactor(Chain);
4811 // Adjust the stack pointer for the new arguments...
4812 // These operations are automatically eliminated by the prolog/epilog pass
4813 Chain = DAG.getCALLSEQ_START(Chain, DAG.getIntPtrConstant(NumBytes, true),
4815 SDValue CallSeqStart = Chain;
4817 // Load the return address and frame pointer so it can be move somewhere else
4820 Chain = EmitTailCallLoadFPAndRetAddr(DAG, SPDiff, Chain, LROp, FPOp, true,
4823 // Set up a copy of the stack pointer for use loading and storing any
4824 // arguments that may not fit in the registers available for argument
4828 StackPtr = DAG.getRegister(PPC::X1, MVT::i64);
4830 StackPtr = DAG.getRegister(PPC::R1, MVT::i32);
4832 // Figure out which arguments are going to go in registers, and which in
4833 // memory. Also, if this is a vararg function, floating point operations
4834 // must be stored to our stack, and loaded into integer regs as well, if
4835 // any integer regs are available for argument passing.
4836 unsigned ArgOffset = LinkageSize;
4837 unsigned GPR_idx = 0, FPR_idx = 0, VR_idx = 0;
4839 static const MCPhysReg GPR_32[] = { // 32-bit registers.
4840 PPC::R3, PPC::R4, PPC::R5, PPC::R6,
4841 PPC::R7, PPC::R8, PPC::R9, PPC::R10,
4843 static const MCPhysReg GPR_64[] = { // 64-bit registers.
4844 PPC::X3, PPC::X4, PPC::X5, PPC::X6,
4845 PPC::X7, PPC::X8, PPC::X9, PPC::X10,
4847 static const MCPhysReg *FPR = GetFPR();
4849 static const MCPhysReg VR[] = {
4850 PPC::V2, PPC::V3, PPC::V4, PPC::V5, PPC::V6, PPC::V7, PPC::V8,
4851 PPC::V9, PPC::V10, PPC::V11, PPC::V12, PPC::V13
4853 const unsigned NumGPRs = array_lengthof(GPR_32);
4854 const unsigned NumFPRs = 13;
4855 const unsigned NumVRs = array_lengthof(VR);
4857 const MCPhysReg *GPR = isPPC64 ? GPR_64 : GPR_32;
4859 SmallVector<std::pair<unsigned, SDValue>, 8> RegsToPass;
4860 SmallVector<TailCallArgumentInfo, 8> TailCallArguments;
4862 SmallVector<SDValue, 8> MemOpChains;
4863 for (unsigned i = 0; i != NumOps; ++i) {
4864 SDValue Arg = OutVals[i];
4865 ISD::ArgFlagsTy Flags = Outs[i].Flags;
4867 // PtrOff will be used to store the current argument to the stack if a
4868 // register cannot be found for it.
4871 PtrOff = DAG.getConstant(ArgOffset, StackPtr.getValueType());
4873 PtrOff = DAG.getNode(ISD::ADD, dl, PtrVT, StackPtr, PtrOff);
4875 // On PPC64, promote integers to 64-bit values.
4876 if (isPPC64 && Arg.getValueType() == MVT::i32) {
4877 // FIXME: Should this use ANY_EXTEND if neither sext nor zext?
4878 unsigned ExtOp = Flags.isSExt() ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND;
4879 Arg = DAG.getNode(ExtOp, dl, MVT::i64, Arg);
4882 // FIXME memcpy is used way more than necessary. Correctness first.
4883 // Note: "by value" is code for passing a structure by value, not
4885 if (Flags.isByVal()) {
4886 unsigned Size = Flags.getByValSize();
4887 // Very small objects are passed right-justified. Everything else is
4888 // passed left-justified.
4889 if (Size==1 || Size==2) {
4890 EVT VT = (Size==1) ? MVT::i8 : MVT::i16;
4891 if (GPR_idx != NumGPRs) {
4892 SDValue Load = DAG.getExtLoad(ISD::EXTLOAD, dl, PtrVT, Chain, Arg,
4893 MachinePointerInfo(), VT,
4894 false, false, false, 0);
4895 MemOpChains.push_back(Load.getValue(1));
4896 RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], Load));
4898 ArgOffset += PtrByteSize;
4900 SDValue Const = DAG.getConstant(PtrByteSize - Size,
4901 PtrOff.getValueType());
4902 SDValue AddPtr = DAG.getNode(ISD::ADD, dl, PtrVT, PtrOff, Const);
4903 Chain = CallSeqStart = createMemcpyOutsideCallSeq(Arg, AddPtr,
4906 ArgOffset += PtrByteSize;
4910 // Copy entire object into memory. There are cases where gcc-generated
4911 // code assumes it is there, even if it could be put entirely into
4912 // registers. (This is not what the doc says.)
4913 Chain = CallSeqStart = createMemcpyOutsideCallSeq(Arg, PtrOff,
4917 // For small aggregates (Darwin only) and aggregates >= PtrByteSize,
4918 // copy the pieces of the object that fit into registers from the
4919 // parameter save area.
4920 for (unsigned j=0; j<Size; j+=PtrByteSize) {
4921 SDValue Const = DAG.getConstant(j, PtrOff.getValueType());
4922 SDValue AddArg = DAG.getNode(ISD::ADD, dl, PtrVT, Arg, Const);
4923 if (GPR_idx != NumGPRs) {
4924 SDValue Load = DAG.getLoad(PtrVT, dl, Chain, AddArg,
4925 MachinePointerInfo(),
4926 false, false, false, 0);
4927 MemOpChains.push_back(Load.getValue(1));
4928 RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], Load));
4929 ArgOffset += PtrByteSize;
4931 ArgOffset += ((Size - j + PtrByteSize-1)/PtrByteSize)*PtrByteSize;
4938 switch (Arg.getSimpleValueType().SimpleTy) {
4939 default: llvm_unreachable("Unexpected ValueType for argument!");
4943 if (GPR_idx != NumGPRs) {
4944 if (Arg.getValueType() == MVT::i1)
4945 Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, PtrVT, Arg);
4947 RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], Arg));
4949 LowerMemOpCallTo(DAG, MF, Chain, Arg, PtrOff, SPDiff, ArgOffset,
4950 isPPC64, isTailCall, false, MemOpChains,
4951 TailCallArguments, dl);
4953 ArgOffset += PtrByteSize;
4957 if (FPR_idx != NumFPRs) {
4958 RegsToPass.push_back(std::make_pair(FPR[FPR_idx++], Arg));
4961 SDValue Store = DAG.getStore(Chain, dl, Arg, PtrOff,
4962 MachinePointerInfo(), false, false, 0);
4963 MemOpChains.push_back(Store);
4965 // Float varargs are always shadowed in available integer registers
4966 if (GPR_idx != NumGPRs) {
4967 SDValue Load = DAG.getLoad(PtrVT, dl, Store, PtrOff,
4968 MachinePointerInfo(), false, false,
4970 MemOpChains.push_back(Load.getValue(1));
4971 RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], Load));
4973 if (GPR_idx != NumGPRs && Arg.getValueType() == MVT::f64 && !isPPC64){
4974 SDValue ConstFour = DAG.getConstant(4, PtrOff.getValueType());
4975 PtrOff = DAG.getNode(ISD::ADD, dl, PtrVT, PtrOff, ConstFour);
4976 SDValue Load = DAG.getLoad(PtrVT, dl, Store, PtrOff,
4977 MachinePointerInfo(),
4978 false, false, false, 0);
4979 MemOpChains.push_back(Load.getValue(1));
4980 RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], Load));
4983 // If we have any FPRs remaining, we may also have GPRs remaining.
4984 // Args passed in FPRs consume either 1 (f32) or 2 (f64) available
4986 if (GPR_idx != NumGPRs)
4988 if (GPR_idx != NumGPRs && Arg.getValueType() == MVT::f64 &&
4989 !isPPC64) // PPC64 has 64-bit GPR's obviously :)
4993 LowerMemOpCallTo(DAG, MF, Chain, Arg, PtrOff, SPDiff, ArgOffset,
4994 isPPC64, isTailCall, false, MemOpChains,
4995 TailCallArguments, dl);
4999 ArgOffset += Arg.getValueType() == MVT::f32 ? 4 : 8;
5006 // These go aligned on the stack, or in the corresponding R registers
5007 // when within range. The Darwin PPC ABI doc claims they also go in
5008 // V registers; in fact gcc does this only for arguments that are
5009 // prototyped, not for those that match the ... We do it for all
5010 // arguments, seems to work.
5011 while (ArgOffset % 16 !=0) {
5012 ArgOffset += PtrByteSize;
5013 if (GPR_idx != NumGPRs)
5016 // We could elide this store in the case where the object fits
5017 // entirely in R registers. Maybe later.
5018 PtrOff = DAG.getNode(ISD::ADD, dl, PtrVT, StackPtr,
5019 DAG.getConstant(ArgOffset, PtrVT));
5020 SDValue Store = DAG.getStore(Chain, dl, Arg, PtrOff,
5021 MachinePointerInfo(), false, false, 0);
5022 MemOpChains.push_back(Store);
5023 if (VR_idx != NumVRs) {
5024 SDValue Load = DAG.getLoad(MVT::v4f32, dl, Store, PtrOff,
5025 MachinePointerInfo(),
5026 false, false, false, 0);
5027 MemOpChains.push_back(Load.getValue(1));
5028 RegsToPass.push_back(std::make_pair(VR[VR_idx++], Load));
5031 for (unsigned i=0; i<16; i+=PtrByteSize) {
5032 if (GPR_idx == NumGPRs)
5034 SDValue Ix = DAG.getNode(ISD::ADD, dl, PtrVT, PtrOff,
5035 DAG.getConstant(i, PtrVT));
5036 SDValue Load = DAG.getLoad(PtrVT, dl, Store, Ix, MachinePointerInfo(),
5037 false, false, false, 0);
5038 MemOpChains.push_back(Load.getValue(1));
5039 RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], Load));
5044 // Non-varargs Altivec params generally go in registers, but have
5045 // stack space allocated at the end.
5046 if (VR_idx != NumVRs) {
5047 // Doesn't have GPR space allocated.
5048 RegsToPass.push_back(std::make_pair(VR[VR_idx++], Arg));
5049 } else if (nAltivecParamsAtEnd==0) {
5050 // We are emitting Altivec params in order.
5051 LowerMemOpCallTo(DAG, MF, Chain, Arg, PtrOff, SPDiff, ArgOffset,
5052 isPPC64, isTailCall, true, MemOpChains,
5053 TailCallArguments, dl);
5059 // If all Altivec parameters fit in registers, as they usually do,
5060 // they get stack space following the non-Altivec parameters. We
5061 // don't track this here because nobody below needs it.
5062 // If there are more Altivec parameters than fit in registers emit
5064 if (!isVarArg && nAltivecParamsAtEnd > NumVRs) {
5066 // Offset is aligned; skip 1st 12 params which go in V registers.
5067 ArgOffset = ((ArgOffset+15)/16)*16;
5069 for (unsigned i = 0; i != NumOps; ++i) {
5070 SDValue Arg = OutVals[i];
5071 EVT ArgType = Outs[i].VT;
5072 if (ArgType==MVT::v4f32 || ArgType==MVT::v4i32 ||
5073 ArgType==MVT::v8i16 || ArgType==MVT::v16i8) {
5076 // We are emitting Altivec params in order.
5077 LowerMemOpCallTo(DAG, MF, Chain, Arg, PtrOff, SPDiff, ArgOffset,
5078 isPPC64, isTailCall, true, MemOpChains,
5079 TailCallArguments, dl);
5086 if (!MemOpChains.empty())
5087 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOpChains);
5089 // On Darwin, R12 must contain the address of an indirect callee. This does
5090 // not mean the MTCTR instruction must use R12; it's easier to model this as
5091 // an extra parameter, so do that.
5093 !isFunctionGlobalAddress(Callee) &&
5094 !isa<ExternalSymbolSDNode>(Callee) &&
5095 !isBLACompatibleAddress(Callee, DAG))
5096 RegsToPass.push_back(std::make_pair((unsigned)(isPPC64 ? PPC::X12 :
5097 PPC::R12), Callee));
5099 // Build a sequence of copy-to-reg nodes chained together with token chain
5100 // and flag operands which copy the outgoing args into the appropriate regs.
5102 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
5103 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
5104 RegsToPass[i].second, InFlag);
5105 InFlag = Chain.getValue(1);
5109 PrepareTailCall(DAG, InFlag, Chain, dl, isPPC64, SPDiff, NumBytes, LROp,
5110 FPOp, true, TailCallArguments);
5112 return FinishCall(CallConv, dl, isTailCall, isVarArg, IsPatchPoint, DAG,
5113 RegsToPass, InFlag, Chain, Callee, SPDiff, NumBytes,
5118 PPCTargetLowering::CanLowerReturn(CallingConv::ID CallConv,
5119 MachineFunction &MF, bool isVarArg,
5120 const SmallVectorImpl<ISD::OutputArg> &Outs,
5121 LLVMContext &Context) const {
5122 SmallVector<CCValAssign, 16> RVLocs;
5123 CCState CCInfo(CallConv, isVarArg, MF, RVLocs, Context);
5124 return CCInfo.CheckReturn(Outs, RetCC_PPC);
5128 PPCTargetLowering::LowerReturn(SDValue Chain,
5129 CallingConv::ID CallConv, bool isVarArg,
5130 const SmallVectorImpl<ISD::OutputArg> &Outs,
5131 const SmallVectorImpl<SDValue> &OutVals,
5132 SDLoc dl, SelectionDAG &DAG) const {
5134 SmallVector<CCValAssign, 16> RVLocs;
5135 CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(), RVLocs,
5137 CCInfo.AnalyzeReturn(Outs, RetCC_PPC);
5140 SmallVector<SDValue, 4> RetOps(1, Chain);
5142 // Copy the result values into the output registers.
5143 for (unsigned i = 0; i != RVLocs.size(); ++i) {
5144 CCValAssign &VA = RVLocs[i];
5145 assert(VA.isRegLoc() && "Can only return in registers!");
5147 SDValue Arg = OutVals[i];
5149 switch (VA.getLocInfo()) {
5150 default: llvm_unreachable("Unknown loc info!");
5151 case CCValAssign::Full: break;
5152 case CCValAssign::AExt:
5153 Arg = DAG.getNode(ISD::ANY_EXTEND, dl, VA.getLocVT(), Arg);
5155 case CCValAssign::ZExt:
5156 Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, VA.getLocVT(), Arg);
5158 case CCValAssign::SExt:
5159 Arg = DAG.getNode(ISD::SIGN_EXTEND, dl, VA.getLocVT(), Arg);
5163 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), Arg, Flag);
5164 Flag = Chain.getValue(1);
5165 RetOps.push_back(DAG.getRegister(VA.getLocReg(), VA.getLocVT()));
5168 RetOps[0] = Chain; // Update chain.
5170 // Add the flag if we have it.
5172 RetOps.push_back(Flag);
5174 return DAG.getNode(PPCISD::RET_FLAG, dl, MVT::Other, RetOps);
5177 SDValue PPCTargetLowering::LowerSTACKRESTORE(SDValue Op, SelectionDAG &DAG,
5178 const PPCSubtarget &Subtarget) const {
5179 // When we pop the dynamic allocation we need to restore the SP link.
5182 // Get the corect type for pointers.
5183 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
5185 // Construct the stack pointer operand.
5186 bool isPPC64 = Subtarget.isPPC64();
5187 unsigned SP = isPPC64 ? PPC::X1 : PPC::R1;
5188 SDValue StackPtr = DAG.getRegister(SP, PtrVT);
5190 // Get the operands for the STACKRESTORE.
5191 SDValue Chain = Op.getOperand(0);
5192 SDValue SaveSP = Op.getOperand(1);
5194 // Load the old link SP.
5195 SDValue LoadLinkSP = DAG.getLoad(PtrVT, dl, Chain, StackPtr,
5196 MachinePointerInfo(),
5197 false, false, false, 0);
5199 // Restore the stack pointer.
5200 Chain = DAG.getCopyToReg(LoadLinkSP.getValue(1), dl, SP, SaveSP);
5202 // Store the old link SP.
5203 return DAG.getStore(Chain, dl, LoadLinkSP, StackPtr, MachinePointerInfo(),
5210 PPCTargetLowering::getReturnAddrFrameIndex(SelectionDAG & DAG) const {
5211 MachineFunction &MF = DAG.getMachineFunction();
5212 bool isPPC64 = Subtarget.isPPC64();
5213 bool isDarwinABI = Subtarget.isDarwinABI();
5214 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
5216 // Get current frame pointer save index. The users of this index will be
5217 // primarily DYNALLOC instructions.
5218 PPCFunctionInfo *FI = MF.getInfo<PPCFunctionInfo>();
5219 int RASI = FI->getReturnAddrSaveIndex();
5221 // If the frame pointer save index hasn't been defined yet.
5223 // Find out what the fix offset of the frame pointer save area.
5224 int LROffset = PPCFrameLowering::getReturnSaveOffset(isPPC64, isDarwinABI);
5225 // Allocate the frame index for frame pointer save area.
5226 RASI = MF.getFrameInfo()->CreateFixedObject(isPPC64? 8 : 4, LROffset, false);
5228 FI->setReturnAddrSaveIndex(RASI);
5230 return DAG.getFrameIndex(RASI, PtrVT);
5234 PPCTargetLowering::getFramePointerFrameIndex(SelectionDAG & DAG) const {
5235 MachineFunction &MF = DAG.getMachineFunction();
5236 bool isPPC64 = Subtarget.isPPC64();
5237 bool isDarwinABI = Subtarget.isDarwinABI();
5238 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
5240 // Get current frame pointer save index. The users of this index will be
5241 // primarily DYNALLOC instructions.
5242 PPCFunctionInfo *FI = MF.getInfo<PPCFunctionInfo>();
5243 int FPSI = FI->getFramePointerSaveIndex();
5245 // If the frame pointer save index hasn't been defined yet.
5247 // Find out what the fix offset of the frame pointer save area.
5248 int FPOffset = PPCFrameLowering::getFramePointerSaveOffset(isPPC64,
5251 // Allocate the frame index for frame pointer save area.
5252 FPSI = MF.getFrameInfo()->CreateFixedObject(isPPC64? 8 : 4, FPOffset, true);
5254 FI->setFramePointerSaveIndex(FPSI);
5256 return DAG.getFrameIndex(FPSI, PtrVT);
5259 SDValue PPCTargetLowering::LowerDYNAMIC_STACKALLOC(SDValue Op,
5261 const PPCSubtarget &Subtarget) const {
5263 SDValue Chain = Op.getOperand(0);
5264 SDValue Size = Op.getOperand(1);
5267 // Get the corect type for pointers.
5268 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
5270 SDValue NegSize = DAG.getNode(ISD::SUB, dl, PtrVT,
5271 DAG.getConstant(0, PtrVT), Size);
5272 // Construct a node for the frame pointer save index.
5273 SDValue FPSIdx = getFramePointerFrameIndex(DAG);
5274 // Build a DYNALLOC node.
5275 SDValue Ops[3] = { Chain, NegSize, FPSIdx };
5276 SDVTList VTs = DAG.getVTList(PtrVT, MVT::Other);
5277 return DAG.getNode(PPCISD::DYNALLOC, dl, VTs, Ops);
5280 SDValue PPCTargetLowering::lowerEH_SJLJ_SETJMP(SDValue Op,
5281 SelectionDAG &DAG) const {
5283 return DAG.getNode(PPCISD::EH_SJLJ_SETJMP, DL,
5284 DAG.getVTList(MVT::i32, MVT::Other),
5285 Op.getOperand(0), Op.getOperand(1));
5288 SDValue PPCTargetLowering::lowerEH_SJLJ_LONGJMP(SDValue Op,
5289 SelectionDAG &DAG) const {
5291 return DAG.getNode(PPCISD::EH_SJLJ_LONGJMP, DL, MVT::Other,
5292 Op.getOperand(0), Op.getOperand(1));
5295 SDValue PPCTargetLowering::LowerLOAD(SDValue Op, SelectionDAG &DAG) const {
5296 assert(Op.getValueType() == MVT::i1 &&
5297 "Custom lowering only for i1 loads");
5299 // First, load 8 bits into 32 bits, then truncate to 1 bit.
5302 LoadSDNode *LD = cast<LoadSDNode>(Op);
5304 SDValue Chain = LD->getChain();
5305 SDValue BasePtr = LD->getBasePtr();
5306 MachineMemOperand *MMO = LD->getMemOperand();
5308 SDValue NewLD = DAG.getExtLoad(ISD::EXTLOAD, dl, getPointerTy(), Chain,
5309 BasePtr, MVT::i8, MMO);
5310 SDValue Result = DAG.getNode(ISD::TRUNCATE, dl, MVT::i1, NewLD);
5312 SDValue Ops[] = { Result, SDValue(NewLD.getNode(), 1) };
5313 return DAG.getMergeValues(Ops, dl);
5316 SDValue PPCTargetLowering::LowerSTORE(SDValue Op, SelectionDAG &DAG) const {
5317 assert(Op.getOperand(1).getValueType() == MVT::i1 &&
5318 "Custom lowering only for i1 stores");
5320 // First, zero extend to 32 bits, then use a truncating store to 8 bits.
5323 StoreSDNode *ST = cast<StoreSDNode>(Op);
5325 SDValue Chain = ST->getChain();
5326 SDValue BasePtr = ST->getBasePtr();
5327 SDValue Value = ST->getValue();
5328 MachineMemOperand *MMO = ST->getMemOperand();
5330 Value = DAG.getNode(ISD::ZERO_EXTEND, dl, getPointerTy(), Value);
5331 return DAG.getTruncStore(Chain, dl, Value, BasePtr, MVT::i8, MMO);
5334 // FIXME: Remove this once the ANDI glue bug is fixed:
5335 SDValue PPCTargetLowering::LowerTRUNCATE(SDValue Op, SelectionDAG &DAG) const {
5336 assert(Op.getValueType() == MVT::i1 &&
5337 "Custom lowering only for i1 results");
5340 return DAG.getNode(PPCISD::ANDIo_1_GT_BIT, DL, MVT::i1,
5344 /// LowerSELECT_CC - Lower floating point select_cc's into fsel instruction when
5346 SDValue PPCTargetLowering::LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const {
5347 // Not FP? Not a fsel.
5348 if (!Op.getOperand(0).getValueType().isFloatingPoint() ||
5349 !Op.getOperand(2).getValueType().isFloatingPoint())
5352 // We might be able to do better than this under some circumstances, but in
5353 // general, fsel-based lowering of select is a finite-math-only optimization.
5354 // For more information, see section F.3 of the 2.06 ISA specification.
5355 if (!DAG.getTarget().Options.NoInfsFPMath ||
5356 !DAG.getTarget().Options.NoNaNsFPMath)
5359 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(4))->get();
5361 EVT ResVT = Op.getValueType();
5362 EVT CmpVT = Op.getOperand(0).getValueType();
5363 SDValue LHS = Op.getOperand(0), RHS = Op.getOperand(1);
5364 SDValue TV = Op.getOperand(2), FV = Op.getOperand(3);
5367 // If the RHS of the comparison is a 0.0, we don't need to do the
5368 // subtraction at all.
5370 if (isFloatingPointZero(RHS))
5372 default: break; // SETUO etc aren't handled by fsel.
5376 if (LHS.getValueType() == MVT::f32) // Comparison is always 64-bits
5377 LHS = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, LHS);
5378 Sel1 = DAG.getNode(PPCISD::FSEL, dl, ResVT, LHS, TV, FV);
5379 if (Sel1.getValueType() == MVT::f32) // Comparison is always 64-bits
5380 Sel1 = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Sel1);
5381 return DAG.getNode(PPCISD::FSEL, dl, ResVT,
5382 DAG.getNode(ISD::FNEG, dl, MVT::f64, LHS), Sel1, FV);
5385 std::swap(TV, FV); // fsel is natively setge, swap operands for setlt
5388 if (LHS.getValueType() == MVT::f32) // Comparison is always 64-bits
5389 LHS = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, LHS);
5390 return DAG.getNode(PPCISD::FSEL, dl, ResVT, LHS, TV, FV);
5393 std::swap(TV, FV); // fsel is natively setge, swap operands for setlt
5396 if (LHS.getValueType() == MVT::f32) // Comparison is always 64-bits
5397 LHS = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, LHS);
5398 return DAG.getNode(PPCISD::FSEL, dl, ResVT,
5399 DAG.getNode(ISD::FNEG, dl, MVT::f64, LHS), TV, FV);
5404 default: break; // SETUO etc aren't handled by fsel.
5408 Cmp = DAG.getNode(ISD::FSUB, dl, CmpVT, LHS, RHS);
5409 if (Cmp.getValueType() == MVT::f32) // Comparison is always 64-bits
5410 Cmp = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Cmp);
5411 Sel1 = DAG.getNode(PPCISD::FSEL, dl, ResVT, Cmp, TV, FV);
5412 if (Sel1.getValueType() == MVT::f32) // Comparison is always 64-bits
5413 Sel1 = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Sel1);
5414 return DAG.getNode(PPCISD::FSEL, dl, ResVT,
5415 DAG.getNode(ISD::FNEG, dl, MVT::f64, Cmp), Sel1, FV);
5418 Cmp = DAG.getNode(ISD::FSUB, dl, CmpVT, LHS, RHS);
5419 if (Cmp.getValueType() == MVT::f32) // Comparison is always 64-bits
5420 Cmp = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Cmp);
5421 return DAG.getNode(PPCISD::FSEL, dl, ResVT, Cmp, FV, TV);
5424 Cmp = DAG.getNode(ISD::FSUB, dl, CmpVT, LHS, RHS);
5425 if (Cmp.getValueType() == MVT::f32) // Comparison is always 64-bits
5426 Cmp = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Cmp);
5427 return DAG.getNode(PPCISD::FSEL, dl, ResVT, Cmp, TV, FV);
5430 Cmp = DAG.getNode(ISD::FSUB, dl, CmpVT, RHS, LHS);
5431 if (Cmp.getValueType() == MVT::f32) // Comparison is always 64-bits
5432 Cmp = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Cmp);
5433 return DAG.getNode(PPCISD::FSEL, dl, ResVT, Cmp, FV, TV);
5436 Cmp = DAG.getNode(ISD::FSUB, dl, CmpVT, RHS, LHS);
5437 if (Cmp.getValueType() == MVT::f32) // Comparison is always 64-bits
5438 Cmp = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Cmp);
5439 return DAG.getNode(PPCISD::FSEL, dl, ResVT, Cmp, TV, FV);
5444 void PPCTargetLowering::LowerFP_TO_INTForReuse(SDValue Op, ReuseLoadInfo &RLI,
5447 assert(Op.getOperand(0).getValueType().isFloatingPoint());
5448 SDValue Src = Op.getOperand(0);
5449 if (Src.getValueType() == MVT::f32)
5450 Src = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Src);
5453 switch (Op.getSimpleValueType().SimpleTy) {
5454 default: llvm_unreachable("Unhandled FP_TO_INT type in custom expander!");
5456 Tmp = DAG.getNode(Op.getOpcode()==ISD::FP_TO_SINT ? PPCISD::FCTIWZ :
5457 (Subtarget.hasFPCVT() ? PPCISD::FCTIWUZ :
5462 assert((Op.getOpcode() == ISD::FP_TO_SINT || Subtarget.hasFPCVT()) &&
5463 "i64 FP_TO_UINT is supported only with FPCVT");
5464 Tmp = DAG.getNode(Op.getOpcode()==ISD::FP_TO_SINT ? PPCISD::FCTIDZ :
5470 // Convert the FP value to an int value through memory.
5471 bool i32Stack = Op.getValueType() == MVT::i32 && Subtarget.hasSTFIWX() &&
5472 (Op.getOpcode() == ISD::FP_TO_SINT || Subtarget.hasFPCVT());
5473 SDValue FIPtr = DAG.CreateStackTemporary(i32Stack ? MVT::i32 : MVT::f64);
5474 int FI = cast<FrameIndexSDNode>(FIPtr)->getIndex();
5475 MachinePointerInfo MPI = MachinePointerInfo::getFixedStack(FI);
5477 // Emit a store to the stack slot.
5480 MachineFunction &MF = DAG.getMachineFunction();
5481 MachineMemOperand *MMO =
5482 MF.getMachineMemOperand(MPI, MachineMemOperand::MOStore, 4, 4);
5483 SDValue Ops[] = { DAG.getEntryNode(), Tmp, FIPtr };
5484 Chain = DAG.getMemIntrinsicNode(PPCISD::STFIWX, dl,
5485 DAG.getVTList(MVT::Other), Ops, MVT::i32, MMO);
5487 Chain = DAG.getStore(DAG.getEntryNode(), dl, Tmp, FIPtr,
5488 MPI, false, false, 0);
5490 // Result is a load from the stack slot. If loading 4 bytes, make sure to
5492 if (Op.getValueType() == MVT::i32 && !i32Stack) {
5493 FIPtr = DAG.getNode(ISD::ADD, dl, FIPtr.getValueType(), FIPtr,
5494 DAG.getConstant(4, FIPtr.getValueType()));
5495 MPI = MPI.getWithOffset(4);
5503 SDValue PPCTargetLowering::LowerFP_TO_INT(SDValue Op, SelectionDAG &DAG,
5506 LowerFP_TO_INTForReuse(Op, RLI, DAG, dl);
5508 return DAG.getLoad(Op.getValueType(), dl, RLI.Chain, RLI.Ptr, RLI.MPI, false,
5509 false, RLI.IsInvariant, RLI.Alignment, RLI.AAInfo,
5513 // We're trying to insert a regular store, S, and then a load, L. If the
5514 // incoming value, O, is a load, we might just be able to have our load use the
5515 // address used by O. However, we don't know if anything else will store to
5516 // that address before we can load from it. To prevent this situation, we need
5517 // to insert our load, L, into the chain as a peer of O. To do this, we give L
5518 // the same chain operand as O, we create a token factor from the chain results
5519 // of O and L, and we replace all uses of O's chain result with that token
5520 // factor (see spliceIntoChain below for this last part).
5521 bool PPCTargetLowering::canReuseLoadAddress(SDValue Op, EVT MemVT,
5524 ISD::LoadExtType ET) const {
5526 if (ET == ISD::NON_EXTLOAD &&
5527 (Op.getOpcode() == ISD::FP_TO_UINT ||
5528 Op.getOpcode() == ISD::FP_TO_SINT) &&
5529 isOperationLegalOrCustom(Op.getOpcode(),
5530 Op.getOperand(0).getValueType())) {
5532 LowerFP_TO_INTForReuse(Op, RLI, DAG, dl);
5536 LoadSDNode *LD = dyn_cast<LoadSDNode>(Op);
5537 if (!LD || LD->getExtensionType() != ET || LD->isVolatile() ||
5538 LD->isNonTemporal())
5540 if (LD->getMemoryVT() != MemVT)
5543 RLI.Ptr = LD->getBasePtr();
5544 if (LD->isIndexed() && LD->getOffset().getOpcode() != ISD::UNDEF) {
5545 assert(LD->getAddressingMode() == ISD::PRE_INC &&
5546 "Non-pre-inc AM on PPC?");
5547 RLI.Ptr = DAG.getNode(ISD::ADD, dl, RLI.Ptr.getValueType(), RLI.Ptr,
5551 RLI.Chain = LD->getChain();
5552 RLI.MPI = LD->getPointerInfo();
5553 RLI.IsInvariant = LD->isInvariant();
5554 RLI.Alignment = LD->getAlignment();
5555 RLI.AAInfo = LD->getAAInfo();
5556 RLI.Ranges = LD->getRanges();
5558 RLI.ResChain = SDValue(LD, LD->isIndexed() ? 2 : 1);
5562 // Given the head of the old chain, ResChain, insert a token factor containing
5563 // it and NewResChain, and make users of ResChain now be users of that token
5565 void PPCTargetLowering::spliceIntoChain(SDValue ResChain,
5566 SDValue NewResChain,
5567 SelectionDAG &DAG) const {
5571 SDLoc dl(NewResChain);
5573 SDValue TF = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
5574 NewResChain, DAG.getUNDEF(MVT::Other));
5575 assert(TF.getNode() != NewResChain.getNode() &&
5576 "A new TF really is required here");
5578 DAG.ReplaceAllUsesOfValueWith(ResChain, TF);
5579 DAG.UpdateNodeOperands(TF.getNode(), ResChain, NewResChain);
5582 SDValue PPCTargetLowering::LowerINT_TO_FP(SDValue Op,
5583 SelectionDAG &DAG) const {
5585 // Don't handle ppc_fp128 here; let it be lowered to a libcall.
5586 if (Op.getValueType() != MVT::f32 && Op.getValueType() != MVT::f64)
5589 if (Op.getOperand(0).getValueType() == MVT::i1)
5590 return DAG.getNode(ISD::SELECT, dl, Op.getValueType(), Op.getOperand(0),
5591 DAG.getConstantFP(1.0, Op.getValueType()),
5592 DAG.getConstantFP(0.0, Op.getValueType()));
5594 assert((Op.getOpcode() == ISD::SINT_TO_FP || Subtarget.hasFPCVT()) &&
5595 "UINT_TO_FP is supported only with FPCVT");
5597 // If we have FCFIDS, then use it when converting to single-precision.
5598 // Otherwise, convert to double-precision and then round.
5599 unsigned FCFOp = (Subtarget.hasFPCVT() && Op.getValueType() == MVT::f32) ?
5600 (Op.getOpcode() == ISD::UINT_TO_FP ?
5601 PPCISD::FCFIDUS : PPCISD::FCFIDS) :
5602 (Op.getOpcode() == ISD::UINT_TO_FP ?
5603 PPCISD::FCFIDU : PPCISD::FCFID);
5604 MVT FCFTy = (Subtarget.hasFPCVT() && Op.getValueType() == MVT::f32) ?
5605 MVT::f32 : MVT::f64;
5607 if (Op.getOperand(0).getValueType() == MVT::i64) {
5608 SDValue SINT = Op.getOperand(0);
5609 // When converting to single-precision, we actually need to convert
5610 // to double-precision first and then round to single-precision.
5611 // To avoid double-rounding effects during that operation, we have
5612 // to prepare the input operand. Bits that might be truncated when
5613 // converting to double-precision are replaced by a bit that won't
5614 // be lost at this stage, but is below the single-precision rounding
5617 // However, if -enable-unsafe-fp-math is in effect, accept double
5618 // rounding to avoid the extra overhead.
5619 if (Op.getValueType() == MVT::f32 &&
5620 !Subtarget.hasFPCVT() &&
5621 !DAG.getTarget().Options.UnsafeFPMath) {
5623 // Twiddle input to make sure the low 11 bits are zero. (If this
5624 // is the case, we are guaranteed the value will fit into the 53 bit
5625 // mantissa of an IEEE double-precision value without rounding.)
5626 // If any of those low 11 bits were not zero originally, make sure
5627 // bit 12 (value 2048) is set instead, so that the final rounding
5628 // to single-precision gets the correct result.
5629 SDValue Round = DAG.getNode(ISD::AND, dl, MVT::i64,
5630 SINT, DAG.getConstant(2047, MVT::i64));
5631 Round = DAG.getNode(ISD::ADD, dl, MVT::i64,
5632 Round, DAG.getConstant(2047, MVT::i64));
5633 Round = DAG.getNode(ISD::OR, dl, MVT::i64, Round, SINT);
5634 Round = DAG.getNode(ISD::AND, dl, MVT::i64,
5635 Round, DAG.getConstant(-2048, MVT::i64));
5637 // However, we cannot use that value unconditionally: if the magnitude
5638 // of the input value is small, the bit-twiddling we did above might
5639 // end up visibly changing the output. Fortunately, in that case, we
5640 // don't need to twiddle bits since the original input will convert
5641 // exactly to double-precision floating-point already. Therefore,
5642 // construct a conditional to use the original value if the top 11
5643 // bits are all sign-bit copies, and use the rounded value computed
5645 SDValue Cond = DAG.getNode(ISD::SRA, dl, MVT::i64,
5646 SINT, DAG.getConstant(53, MVT::i32));
5647 Cond = DAG.getNode(ISD::ADD, dl, MVT::i64,
5648 Cond, DAG.getConstant(1, MVT::i64));
5649 Cond = DAG.getSetCC(dl, MVT::i32,
5650 Cond, DAG.getConstant(1, MVT::i64), ISD::SETUGT);
5652 SINT = DAG.getNode(ISD::SELECT, dl, MVT::i64, Cond, Round, SINT);
5658 MachineFunction &MF = DAG.getMachineFunction();
5659 if (canReuseLoadAddress(SINT, MVT::i64, RLI, DAG)) {
5660 Bits = DAG.getLoad(MVT::f64, dl, RLI.Chain, RLI.Ptr, RLI.MPI, false,
5661 false, RLI.IsInvariant, RLI.Alignment, RLI.AAInfo,
5663 spliceIntoChain(RLI.ResChain, Bits.getValue(1), DAG);
5664 } else if (Subtarget.hasLFIWAX() &&
5665 canReuseLoadAddress(SINT, MVT::i32, RLI, DAG, ISD::SEXTLOAD)) {
5666 MachineMemOperand *MMO =
5667 MF.getMachineMemOperand(RLI.MPI, MachineMemOperand::MOLoad, 4,
5668 RLI.Alignment, RLI.AAInfo, RLI.Ranges);
5669 SDValue Ops[] = { RLI.Chain, RLI.Ptr };
5670 Bits = DAG.getMemIntrinsicNode(PPCISD::LFIWAX, dl,
5671 DAG.getVTList(MVT::f64, MVT::Other),
5672 Ops, MVT::i32, MMO);
5673 spliceIntoChain(RLI.ResChain, Bits.getValue(1), DAG);
5674 } else if (Subtarget.hasFPCVT() &&
5675 canReuseLoadAddress(SINT, MVT::i32, RLI, DAG, ISD::ZEXTLOAD)) {
5676 MachineMemOperand *MMO =
5677 MF.getMachineMemOperand(RLI.MPI, MachineMemOperand::MOLoad, 4,
5678 RLI.Alignment, RLI.AAInfo, RLI.Ranges);
5679 SDValue Ops[] = { RLI.Chain, RLI.Ptr };
5680 Bits = DAG.getMemIntrinsicNode(PPCISD::LFIWZX, dl,
5681 DAG.getVTList(MVT::f64, MVT::Other),
5682 Ops, MVT::i32, MMO);
5683 spliceIntoChain(RLI.ResChain, Bits.getValue(1), DAG);
5684 } else if (((Subtarget.hasLFIWAX() &&
5685 SINT.getOpcode() == ISD::SIGN_EXTEND) ||
5686 (Subtarget.hasFPCVT() &&
5687 SINT.getOpcode() == ISD::ZERO_EXTEND)) &&
5688 SINT.getOperand(0).getValueType() == MVT::i32) {
5689 MachineFrameInfo *FrameInfo = MF.getFrameInfo();
5690 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
5692 int FrameIdx = FrameInfo->CreateStackObject(4, 4, false);
5693 SDValue FIdx = DAG.getFrameIndex(FrameIdx, PtrVT);
5696 DAG.getStore(DAG.getEntryNode(), dl, SINT.getOperand(0), FIdx,
5697 MachinePointerInfo::getFixedStack(FrameIdx),
5700 assert(cast<StoreSDNode>(Store)->getMemoryVT() == MVT::i32 &&
5701 "Expected an i32 store");
5705 RLI.MPI = MachinePointerInfo::getFixedStack(FrameIdx);
5708 MachineMemOperand *MMO =
5709 MF.getMachineMemOperand(RLI.MPI, MachineMemOperand::MOLoad, 4,
5710 RLI.Alignment, RLI.AAInfo, RLI.Ranges);
5711 SDValue Ops[] = { RLI.Chain, RLI.Ptr };
5712 Bits = DAG.getMemIntrinsicNode(SINT.getOpcode() == ISD::ZERO_EXTEND ?
5713 PPCISD::LFIWZX : PPCISD::LFIWAX,
5714 dl, DAG.getVTList(MVT::f64, MVT::Other),
5715 Ops, MVT::i32, MMO);
5717 Bits = DAG.getNode(ISD::BITCAST, dl, MVT::f64, SINT);
5719 SDValue FP = DAG.getNode(FCFOp, dl, FCFTy, Bits);
5721 if (Op.getValueType() == MVT::f32 && !Subtarget.hasFPCVT())
5722 FP = DAG.getNode(ISD::FP_ROUND, dl,
5723 MVT::f32, FP, DAG.getIntPtrConstant(0));
5727 assert(Op.getOperand(0).getValueType() == MVT::i32 &&
5728 "Unhandled INT_TO_FP type in custom expander!");
5729 // Since we only generate this in 64-bit mode, we can take advantage of
5730 // 64-bit registers. In particular, sign extend the input value into the
5731 // 64-bit register with extsw, store the WHOLE 64-bit value into the stack
5732 // then lfd it and fcfid it.
5733 MachineFunction &MF = DAG.getMachineFunction();
5734 MachineFrameInfo *FrameInfo = MF.getFrameInfo();
5735 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
5738 if (Subtarget.hasLFIWAX() || Subtarget.hasFPCVT()) {
5741 if (!(ReusingLoad = canReuseLoadAddress(Op.getOperand(0), MVT::i32, RLI,
5743 int FrameIdx = FrameInfo->CreateStackObject(4, 4, false);
5744 SDValue FIdx = DAG.getFrameIndex(FrameIdx, PtrVT);
5746 SDValue Store = DAG.getStore(DAG.getEntryNode(), dl, Op.getOperand(0), FIdx,
5747 MachinePointerInfo::getFixedStack(FrameIdx),
5750 assert(cast<StoreSDNode>(Store)->getMemoryVT() == MVT::i32 &&
5751 "Expected an i32 store");
5755 RLI.MPI = MachinePointerInfo::getFixedStack(FrameIdx);
5759 MachineMemOperand *MMO =
5760 MF.getMachineMemOperand(RLI.MPI, MachineMemOperand::MOLoad, 4,
5761 RLI.Alignment, RLI.AAInfo, RLI.Ranges);
5762 SDValue Ops[] = { RLI.Chain, RLI.Ptr };
5763 Ld = DAG.getMemIntrinsicNode(Op.getOpcode() == ISD::UINT_TO_FP ?
5764 PPCISD::LFIWZX : PPCISD::LFIWAX,
5765 dl, DAG.getVTList(MVT::f64, MVT::Other),
5766 Ops, MVT::i32, MMO);
5768 spliceIntoChain(RLI.ResChain, Ld.getValue(1), DAG);
5770 assert(Subtarget.isPPC64() &&
5771 "i32->FP without LFIWAX supported only on PPC64");
5773 int FrameIdx = FrameInfo->CreateStackObject(8, 8, false);
5774 SDValue FIdx = DAG.getFrameIndex(FrameIdx, PtrVT);
5776 SDValue Ext64 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::i64,
5779 // STD the extended value into the stack slot.
5780 SDValue Store = DAG.getStore(DAG.getEntryNode(), dl, Ext64, FIdx,
5781 MachinePointerInfo::getFixedStack(FrameIdx),
5784 // Load the value as a double.
5785 Ld = DAG.getLoad(MVT::f64, dl, Store, FIdx,
5786 MachinePointerInfo::getFixedStack(FrameIdx),
5787 false, false, false, 0);
5790 // FCFID it and return it.
5791 SDValue FP = DAG.getNode(FCFOp, dl, FCFTy, Ld);
5792 if (Op.getValueType() == MVT::f32 && !Subtarget.hasFPCVT())
5793 FP = DAG.getNode(ISD::FP_ROUND, dl, MVT::f32, FP, DAG.getIntPtrConstant(0));
5797 SDValue PPCTargetLowering::LowerFLT_ROUNDS_(SDValue Op,
5798 SelectionDAG &DAG) const {
5801 The rounding mode is in bits 30:31 of FPSR, and has the following
5808 FLT_ROUNDS, on the other hand, expects the following:
5815 To perform the conversion, we do:
5816 ((FPSCR & 0x3) ^ ((~FPSCR & 0x3) >> 1))
5819 MachineFunction &MF = DAG.getMachineFunction();
5820 EVT VT = Op.getValueType();
5821 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
5823 // Save FP Control Word to register
5825 MVT::f64, // return register
5826 MVT::Glue // unused in this context
5828 SDValue Chain = DAG.getNode(PPCISD::MFFS, dl, NodeTys, None);
5830 // Save FP register to stack slot
5831 int SSFI = MF.getFrameInfo()->CreateStackObject(8, 8, false);
5832 SDValue StackSlot = DAG.getFrameIndex(SSFI, PtrVT);
5833 SDValue Store = DAG.getStore(DAG.getEntryNode(), dl, Chain,
5834 StackSlot, MachinePointerInfo(), false, false,0);
5836 // Load FP Control Word from low 32 bits of stack slot.
5837 SDValue Four = DAG.getConstant(4, PtrVT);
5838 SDValue Addr = DAG.getNode(ISD::ADD, dl, PtrVT, StackSlot, Four);
5839 SDValue CWD = DAG.getLoad(MVT::i32, dl, Store, Addr, MachinePointerInfo(),
5840 false, false, false, 0);
5842 // Transform as necessary
5844 DAG.getNode(ISD::AND, dl, MVT::i32,
5845 CWD, DAG.getConstant(3, MVT::i32));
5847 DAG.getNode(ISD::SRL, dl, MVT::i32,
5848 DAG.getNode(ISD::AND, dl, MVT::i32,
5849 DAG.getNode(ISD::XOR, dl, MVT::i32,
5850 CWD, DAG.getConstant(3, MVT::i32)),
5851 DAG.getConstant(3, MVT::i32)),
5852 DAG.getConstant(1, MVT::i32));
5855 DAG.getNode(ISD::XOR, dl, MVT::i32, CWD1, CWD2);
5857 return DAG.getNode((VT.getSizeInBits() < 16 ?
5858 ISD::TRUNCATE : ISD::ZERO_EXTEND), dl, VT, RetVal);
5861 SDValue PPCTargetLowering::LowerSHL_PARTS(SDValue Op, SelectionDAG &DAG) const {
5862 EVT VT = Op.getValueType();
5863 unsigned BitWidth = VT.getSizeInBits();
5865 assert(Op.getNumOperands() == 3 &&
5866 VT == Op.getOperand(1).getValueType() &&
5869 // Expand into a bunch of logical ops. Note that these ops
5870 // depend on the PPC behavior for oversized shift amounts.
5871 SDValue Lo = Op.getOperand(0);
5872 SDValue Hi = Op.getOperand(1);
5873 SDValue Amt = Op.getOperand(2);
5874 EVT AmtVT = Amt.getValueType();
5876 SDValue Tmp1 = DAG.getNode(ISD::SUB, dl, AmtVT,
5877 DAG.getConstant(BitWidth, AmtVT), Amt);
5878 SDValue Tmp2 = DAG.getNode(PPCISD::SHL, dl, VT, Hi, Amt);
5879 SDValue Tmp3 = DAG.getNode(PPCISD::SRL, dl, VT, Lo, Tmp1);
5880 SDValue Tmp4 = DAG.getNode(ISD::OR , dl, VT, Tmp2, Tmp3);
5881 SDValue Tmp5 = DAG.getNode(ISD::ADD, dl, AmtVT, Amt,
5882 DAG.getConstant(-BitWidth, AmtVT));
5883 SDValue Tmp6 = DAG.getNode(PPCISD::SHL, dl, VT, Lo, Tmp5);
5884 SDValue OutHi = DAG.getNode(ISD::OR, dl, VT, Tmp4, Tmp6);
5885 SDValue OutLo = DAG.getNode(PPCISD::SHL, dl, VT, Lo, Amt);
5886 SDValue OutOps[] = { OutLo, OutHi };
5887 return DAG.getMergeValues(OutOps, dl);
5890 SDValue PPCTargetLowering::LowerSRL_PARTS(SDValue Op, SelectionDAG &DAG) const {
5891 EVT VT = Op.getValueType();
5893 unsigned BitWidth = VT.getSizeInBits();
5894 assert(Op.getNumOperands() == 3 &&
5895 VT == Op.getOperand(1).getValueType() &&
5898 // Expand into a bunch of logical ops. Note that these ops
5899 // depend on the PPC behavior for oversized shift amounts.
5900 SDValue Lo = Op.getOperand(0);
5901 SDValue Hi = Op.getOperand(1);
5902 SDValue Amt = Op.getOperand(2);
5903 EVT AmtVT = Amt.getValueType();
5905 SDValue Tmp1 = DAG.getNode(ISD::SUB, dl, AmtVT,
5906 DAG.getConstant(BitWidth, AmtVT), Amt);
5907 SDValue Tmp2 = DAG.getNode(PPCISD::SRL, dl, VT, Lo, Amt);
5908 SDValue Tmp3 = DAG.getNode(PPCISD::SHL, dl, VT, Hi, Tmp1);
5909 SDValue Tmp4 = DAG.getNode(ISD::OR, dl, VT, Tmp2, Tmp3);
5910 SDValue Tmp5 = DAG.getNode(ISD::ADD, dl, AmtVT, Amt,
5911 DAG.getConstant(-BitWidth, AmtVT));
5912 SDValue Tmp6 = DAG.getNode(PPCISD::SRL, dl, VT, Hi, Tmp5);
5913 SDValue OutLo = DAG.getNode(ISD::OR, dl, VT, Tmp4, Tmp6);
5914 SDValue OutHi = DAG.getNode(PPCISD::SRL, dl, VT, Hi, Amt);
5915 SDValue OutOps[] = { OutLo, OutHi };
5916 return DAG.getMergeValues(OutOps, dl);
5919 SDValue PPCTargetLowering::LowerSRA_PARTS(SDValue Op, SelectionDAG &DAG) const {
5921 EVT VT = Op.getValueType();
5922 unsigned BitWidth = VT.getSizeInBits();
5923 assert(Op.getNumOperands() == 3 &&
5924 VT == Op.getOperand(1).getValueType() &&
5927 // Expand into a bunch of logical ops, followed by a select_cc.
5928 SDValue Lo = Op.getOperand(0);
5929 SDValue Hi = Op.getOperand(1);
5930 SDValue Amt = Op.getOperand(2);
5931 EVT AmtVT = Amt.getValueType();
5933 SDValue Tmp1 = DAG.getNode(ISD::SUB, dl, AmtVT,
5934 DAG.getConstant(BitWidth, AmtVT), Amt);
5935 SDValue Tmp2 = DAG.getNode(PPCISD::SRL, dl, VT, Lo, Amt);
5936 SDValue Tmp3 = DAG.getNode(PPCISD::SHL, dl, VT, Hi, Tmp1);
5937 SDValue Tmp4 = DAG.getNode(ISD::OR, dl, VT, Tmp2, Tmp3);
5938 SDValue Tmp5 = DAG.getNode(ISD::ADD, dl, AmtVT, Amt,
5939 DAG.getConstant(-BitWidth, AmtVT));
5940 SDValue Tmp6 = DAG.getNode(PPCISD::SRA, dl, VT, Hi, Tmp5);
5941 SDValue OutHi = DAG.getNode(PPCISD::SRA, dl, VT, Hi, Amt);
5942 SDValue OutLo = DAG.getSelectCC(dl, Tmp5, DAG.getConstant(0, AmtVT),
5943 Tmp4, Tmp6, ISD::SETLE);
5944 SDValue OutOps[] = { OutLo, OutHi };
5945 return DAG.getMergeValues(OutOps, dl);
5948 //===----------------------------------------------------------------------===//
5949 // Vector related lowering.
5952 /// BuildSplatI - Build a canonical splati of Val with an element size of
5953 /// SplatSize. Cast the result to VT.
5954 static SDValue BuildSplatI(int Val, unsigned SplatSize, EVT VT,
5955 SelectionDAG &DAG, SDLoc dl) {
5956 assert(Val >= -16 && Val <= 15 && "vsplti is out of range!");
5958 static const EVT VTys[] = { // canonical VT to use for each size.
5959 MVT::v16i8, MVT::v8i16, MVT::Other, MVT::v4i32
5962 EVT ReqVT = VT != MVT::Other ? VT : VTys[SplatSize-1];
5964 // Force vspltis[hw] -1 to vspltisb -1 to canonicalize.
5968 EVT CanonicalVT = VTys[SplatSize-1];
5970 // Build a canonical splat for this value.
5971 SDValue Elt = DAG.getConstant(Val, MVT::i32);
5972 SmallVector<SDValue, 8> Ops;
5973 Ops.assign(CanonicalVT.getVectorNumElements(), Elt);
5974 SDValue Res = DAG.getNode(ISD::BUILD_VECTOR, dl, CanonicalVT, Ops);
5975 return DAG.getNode(ISD::BITCAST, dl, ReqVT, Res);
5978 /// BuildIntrinsicOp - Return a unary operator intrinsic node with the
5979 /// specified intrinsic ID.
5980 static SDValue BuildIntrinsicOp(unsigned IID, SDValue Op,
5981 SelectionDAG &DAG, SDLoc dl,
5982 EVT DestVT = MVT::Other) {
5983 if (DestVT == MVT::Other) DestVT = Op.getValueType();
5984 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, DestVT,
5985 DAG.getConstant(IID, MVT::i32), Op);
5988 /// BuildIntrinsicOp - Return a binary operator intrinsic node with the
5989 /// specified intrinsic ID.
5990 static SDValue BuildIntrinsicOp(unsigned IID, SDValue LHS, SDValue RHS,
5991 SelectionDAG &DAG, SDLoc dl,
5992 EVT DestVT = MVT::Other) {
5993 if (DestVT == MVT::Other) DestVT = LHS.getValueType();
5994 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, DestVT,
5995 DAG.getConstant(IID, MVT::i32), LHS, RHS);
5998 /// BuildIntrinsicOp - Return a ternary operator intrinsic node with the
5999 /// specified intrinsic ID.
6000 static SDValue BuildIntrinsicOp(unsigned IID, SDValue Op0, SDValue Op1,
6001 SDValue Op2, SelectionDAG &DAG,
6002 SDLoc dl, EVT DestVT = MVT::Other) {
6003 if (DestVT == MVT::Other) DestVT = Op0.getValueType();
6004 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, DestVT,
6005 DAG.getConstant(IID, MVT::i32), Op0, Op1, Op2);
6009 /// BuildVSLDOI - Return a VECTOR_SHUFFLE that is a vsldoi of the specified
6010 /// amount. The result has the specified value type.
6011 static SDValue BuildVSLDOI(SDValue LHS, SDValue RHS, unsigned Amt,
6012 EVT VT, SelectionDAG &DAG, SDLoc dl) {
6013 // Force LHS/RHS to be the right type.
6014 LHS = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, LHS);
6015 RHS = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, RHS);
6018 for (unsigned i = 0; i != 16; ++i)
6020 SDValue T = DAG.getVectorShuffle(MVT::v16i8, dl, LHS, RHS, Ops);
6021 return DAG.getNode(ISD::BITCAST, dl, VT, T);
6024 // If this is a case we can't handle, return null and let the default
6025 // expansion code take care of it. If we CAN select this case, and if it
6026 // selects to a single instruction, return Op. Otherwise, if we can codegen
6027 // this case more efficiently than a constant pool load, lower it to the
6028 // sequence of ops that should be used.
6029 SDValue PPCTargetLowering::LowerBUILD_VECTOR(SDValue Op,
6030 SelectionDAG &DAG) const {
6032 BuildVectorSDNode *BVN = dyn_cast<BuildVectorSDNode>(Op.getNode());
6033 assert(BVN && "Expected a BuildVectorSDNode in LowerBUILD_VECTOR");
6035 // Check if this is a splat of a constant value.
6036 APInt APSplatBits, APSplatUndef;
6037 unsigned SplatBitSize;
6039 if (! BVN->isConstantSplat(APSplatBits, APSplatUndef, SplatBitSize,
6040 HasAnyUndefs, 0, true) || SplatBitSize > 32)
6043 unsigned SplatBits = APSplatBits.getZExtValue();
6044 unsigned SplatUndef = APSplatUndef.getZExtValue();
6045 unsigned SplatSize = SplatBitSize / 8;
6047 // First, handle single instruction cases.
6050 if (SplatBits == 0) {
6051 // Canonicalize all zero vectors to be v4i32.
6052 if (Op.getValueType() != MVT::v4i32 || HasAnyUndefs) {
6053 SDValue Z = DAG.getConstant(0, MVT::i32);
6054 Z = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, Z, Z, Z, Z);
6055 Op = DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), Z);
6060 // If the sign extended value is in the range [-16,15], use VSPLTI[bhw].
6061 int32_t SextVal= (int32_t(SplatBits << (32-SplatBitSize)) >>
6063 if (SextVal >= -16 && SextVal <= 15)
6064 return BuildSplatI(SextVal, SplatSize, Op.getValueType(), DAG, dl);
6067 // Two instruction sequences.
6069 // If this value is in the range [-32,30] and is even, use:
6070 // VSPLTI[bhw](val/2) + VSPLTI[bhw](val/2)
6071 // If this value is in the range [17,31] and is odd, use:
6072 // VSPLTI[bhw](val-16) - VSPLTI[bhw](-16)
6073 // If this value is in the range [-31,-17] and is odd, use:
6074 // VSPLTI[bhw](val+16) + VSPLTI[bhw](-16)
6075 // Note the last two are three-instruction sequences.
6076 if (SextVal >= -32 && SextVal <= 31) {
6077 // To avoid having these optimizations undone by constant folding,
6078 // we convert to a pseudo that will be expanded later into one of
6080 SDValue Elt = DAG.getConstant(SextVal, MVT::i32);
6081 EVT VT = (SplatSize == 1 ? MVT::v16i8 :
6082 (SplatSize == 2 ? MVT::v8i16 : MVT::v4i32));
6083 SDValue EltSize = DAG.getConstant(SplatSize, MVT::i32);
6084 SDValue RetVal = DAG.getNode(PPCISD::VADD_SPLAT, dl, VT, Elt, EltSize);
6085 if (VT == Op.getValueType())
6088 return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), RetVal);
6091 // If this is 0x8000_0000 x 4, turn into vspltisw + vslw. If it is
6092 // 0x7FFF_FFFF x 4, turn it into not(0x8000_0000). This is important
6094 if (SplatSize == 4 && SplatBits == (0x7FFFFFFF&~SplatUndef)) {
6095 // Make -1 and vspltisw -1:
6096 SDValue OnesV = BuildSplatI(-1, 4, MVT::v4i32, DAG, dl);
6098 // Make the VSLW intrinsic, computing 0x8000_0000.
6099 SDValue Res = BuildIntrinsicOp(Intrinsic::ppc_altivec_vslw, OnesV,
6102 // xor by OnesV to invert it.
6103 Res = DAG.getNode(ISD::XOR, dl, MVT::v4i32, Res, OnesV);
6104 return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), Res);
6107 // The remaining cases assume either big endian element order or
6108 // a splat-size that equates to the element size of the vector
6109 // to be built. An example that doesn't work for little endian is
6110 // {0, -1, 0, -1, 0, -1, 0, -1} which has a splat size of 32 bits
6111 // and a vector element size of 16 bits. The code below will
6112 // produce the vector in big endian element order, which for little
6113 // endian is {-1, 0, -1, 0, -1, 0, -1, 0}.
6115 // For now, just avoid these optimizations in that case.
6116 // FIXME: Develop correct optimizations for LE with mismatched
6117 // splat and element sizes.
6119 if (Subtarget.isLittleEndian() &&
6120 SplatSize != Op.getValueType().getVectorElementType().getSizeInBits())
6123 // Check to see if this is a wide variety of vsplti*, binop self cases.
6124 static const signed char SplatCsts[] = {
6125 -1, 1, -2, 2, -3, 3, -4, 4, -5, 5, -6, 6, -7, 7,
6126 -8, 8, -9, 9, -10, 10, -11, 11, -12, 12, -13, 13, 14, -14, 15, -15, -16
6129 for (unsigned idx = 0; idx < array_lengthof(SplatCsts); ++idx) {
6130 // Indirect through the SplatCsts array so that we favor 'vsplti -1' for
6131 // cases which are ambiguous (e.g. formation of 0x8000_0000). 'vsplti -1'
6132 int i = SplatCsts[idx];
6134 // Figure out what shift amount will be used by altivec if shifted by i in
6136 unsigned TypeShiftAmt = i & (SplatBitSize-1);
6138 // vsplti + shl self.
6139 if (SextVal == (int)((unsigned)i << TypeShiftAmt)) {
6140 SDValue Res = BuildSplatI(i, SplatSize, MVT::Other, DAG, dl);
6141 static const unsigned IIDs[] = { // Intrinsic to use for each size.
6142 Intrinsic::ppc_altivec_vslb, Intrinsic::ppc_altivec_vslh, 0,
6143 Intrinsic::ppc_altivec_vslw
6145 Res = BuildIntrinsicOp(IIDs[SplatSize-1], Res, Res, DAG, dl);
6146 return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), Res);
6149 // vsplti + srl self.
6150 if (SextVal == (int)((unsigned)i >> TypeShiftAmt)) {
6151 SDValue Res = BuildSplatI(i, SplatSize, MVT::Other, DAG, dl);
6152 static const unsigned IIDs[] = { // Intrinsic to use for each size.
6153 Intrinsic::ppc_altivec_vsrb, Intrinsic::ppc_altivec_vsrh, 0,
6154 Intrinsic::ppc_altivec_vsrw
6156 Res = BuildIntrinsicOp(IIDs[SplatSize-1], Res, Res, DAG, dl);
6157 return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), Res);
6160 // vsplti + sra self.
6161 if (SextVal == (int)((unsigned)i >> TypeShiftAmt)) {
6162 SDValue Res = BuildSplatI(i, SplatSize, MVT::Other, DAG, dl);
6163 static const unsigned IIDs[] = { // Intrinsic to use for each size.
6164 Intrinsic::ppc_altivec_vsrab, Intrinsic::ppc_altivec_vsrah, 0,
6165 Intrinsic::ppc_altivec_vsraw
6167 Res = BuildIntrinsicOp(IIDs[SplatSize-1], Res, Res, DAG, dl);
6168 return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), Res);
6171 // vsplti + rol self.
6172 if (SextVal == (int)(((unsigned)i << TypeShiftAmt) |
6173 ((unsigned)i >> (SplatBitSize-TypeShiftAmt)))) {
6174 SDValue Res = BuildSplatI(i, SplatSize, MVT::Other, DAG, dl);
6175 static const unsigned IIDs[] = { // Intrinsic to use for each size.
6176 Intrinsic::ppc_altivec_vrlb, Intrinsic::ppc_altivec_vrlh, 0,
6177 Intrinsic::ppc_altivec_vrlw
6179 Res = BuildIntrinsicOp(IIDs[SplatSize-1], Res, Res, DAG, dl);
6180 return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), Res);
6183 // t = vsplti c, result = vsldoi t, t, 1
6184 if (SextVal == (int)(((unsigned)i << 8) | (i < 0 ? 0xFF : 0))) {
6185 SDValue T = BuildSplatI(i, SplatSize, MVT::v16i8, DAG, dl);
6186 return BuildVSLDOI(T, T, 1, Op.getValueType(), DAG, dl);
6188 // t = vsplti c, result = vsldoi t, t, 2
6189 if (SextVal == (int)(((unsigned)i << 16) | (i < 0 ? 0xFFFF : 0))) {
6190 SDValue T = BuildSplatI(i, SplatSize, MVT::v16i8, DAG, dl);
6191 return BuildVSLDOI(T, T, 2, Op.getValueType(), DAG, dl);
6193 // t = vsplti c, result = vsldoi t, t, 3
6194 if (SextVal == (int)(((unsigned)i << 24) | (i < 0 ? 0xFFFFFF : 0))) {
6195 SDValue T = BuildSplatI(i, SplatSize, MVT::v16i8, DAG, dl);
6196 return BuildVSLDOI(T, T, 3, Op.getValueType(), DAG, dl);
6203 /// GeneratePerfectShuffle - Given an entry in the perfect-shuffle table, emit
6204 /// the specified operations to build the shuffle.
6205 static SDValue GeneratePerfectShuffle(unsigned PFEntry, SDValue LHS,
6206 SDValue RHS, SelectionDAG &DAG,
6208 unsigned OpNum = (PFEntry >> 26) & 0x0F;
6209 unsigned LHSID = (PFEntry >> 13) & ((1 << 13)-1);
6210 unsigned RHSID = (PFEntry >> 0) & ((1 << 13)-1);
6213 OP_COPY = 0, // Copy, used for things like <u,u,u,3> to say it is <0,1,2,3>
6225 if (OpNum == OP_COPY) {
6226 if (LHSID == (1*9+2)*9+3) return LHS;
6227 assert(LHSID == ((4*9+5)*9+6)*9+7 && "Illegal OP_COPY!");
6231 SDValue OpLHS, OpRHS;
6232 OpLHS = GeneratePerfectShuffle(PerfectShuffleTable[LHSID], LHS, RHS, DAG, dl);
6233 OpRHS = GeneratePerfectShuffle(PerfectShuffleTable[RHSID], LHS, RHS, DAG, dl);
6237 default: llvm_unreachable("Unknown i32 permute!");
6239 ShufIdxs[ 0] = 0; ShufIdxs[ 1] = 1; ShufIdxs[ 2] = 2; ShufIdxs[ 3] = 3;
6240 ShufIdxs[ 4] = 16; ShufIdxs[ 5] = 17; ShufIdxs[ 6] = 18; ShufIdxs[ 7] = 19;
6241 ShufIdxs[ 8] = 4; ShufIdxs[ 9] = 5; ShufIdxs[10] = 6; ShufIdxs[11] = 7;
6242 ShufIdxs[12] = 20; ShufIdxs[13] = 21; ShufIdxs[14] = 22; ShufIdxs[15] = 23;
6245 ShufIdxs[ 0] = 8; ShufIdxs[ 1] = 9; ShufIdxs[ 2] = 10; ShufIdxs[ 3] = 11;
6246 ShufIdxs[ 4] = 24; ShufIdxs[ 5] = 25; ShufIdxs[ 6] = 26; ShufIdxs[ 7] = 27;
6247 ShufIdxs[ 8] = 12; ShufIdxs[ 9] = 13; ShufIdxs[10] = 14; ShufIdxs[11] = 15;
6248 ShufIdxs[12] = 28; ShufIdxs[13] = 29; ShufIdxs[14] = 30; ShufIdxs[15] = 31;
6251 for (unsigned i = 0; i != 16; ++i)
6252 ShufIdxs[i] = (i&3)+0;
6255 for (unsigned i = 0; i != 16; ++i)
6256 ShufIdxs[i] = (i&3)+4;
6259 for (unsigned i = 0; i != 16; ++i)
6260 ShufIdxs[i] = (i&3)+8;
6263 for (unsigned i = 0; i != 16; ++i)
6264 ShufIdxs[i] = (i&3)+12;
6267 return BuildVSLDOI(OpLHS, OpRHS, 4, OpLHS.getValueType(), DAG, dl);
6269 return BuildVSLDOI(OpLHS, OpRHS, 8, OpLHS.getValueType(), DAG, dl);
6271 return BuildVSLDOI(OpLHS, OpRHS, 12, OpLHS.getValueType(), DAG, dl);
6273 EVT VT = OpLHS.getValueType();
6274 OpLHS = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, OpLHS);
6275 OpRHS = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, OpRHS);
6276 SDValue T = DAG.getVectorShuffle(MVT::v16i8, dl, OpLHS, OpRHS, ShufIdxs);
6277 return DAG.getNode(ISD::BITCAST, dl, VT, T);
6280 /// LowerVECTOR_SHUFFLE - Return the code we lower for VECTOR_SHUFFLE. If this
6281 /// is a shuffle we can handle in a single instruction, return it. Otherwise,
6282 /// return the code it can be lowered into. Worst case, it can always be
6283 /// lowered into a vperm.
6284 SDValue PPCTargetLowering::LowerVECTOR_SHUFFLE(SDValue Op,
6285 SelectionDAG &DAG) const {
6287 SDValue V1 = Op.getOperand(0);
6288 SDValue V2 = Op.getOperand(1);
6289 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
6290 EVT VT = Op.getValueType();
6291 bool isLittleEndian = Subtarget.isLittleEndian();
6293 // Cases that are handled by instructions that take permute immediates
6294 // (such as vsplt*) should be left as VECTOR_SHUFFLE nodes so they can be
6295 // selected by the instruction selector.
6296 if (V2.getOpcode() == ISD::UNDEF) {
6297 if (PPC::isSplatShuffleMask(SVOp, 1) ||
6298 PPC::isSplatShuffleMask(SVOp, 2) ||
6299 PPC::isSplatShuffleMask(SVOp, 4) ||
6300 PPC::isVPKUWUMShuffleMask(SVOp, 1, DAG) ||
6301 PPC::isVPKUHUMShuffleMask(SVOp, 1, DAG) ||
6302 PPC::isVSLDOIShuffleMask(SVOp, 1, DAG) != -1 ||
6303 PPC::isVMRGLShuffleMask(SVOp, 1, 1, DAG) ||
6304 PPC::isVMRGLShuffleMask(SVOp, 2, 1, DAG) ||
6305 PPC::isVMRGLShuffleMask(SVOp, 4, 1, DAG) ||
6306 PPC::isVMRGHShuffleMask(SVOp, 1, 1, DAG) ||
6307 PPC::isVMRGHShuffleMask(SVOp, 2, 1, DAG) ||
6308 PPC::isVMRGHShuffleMask(SVOp, 4, 1, DAG)) {
6313 // Altivec has a variety of "shuffle immediates" that take two vector inputs
6314 // and produce a fixed permutation. If any of these match, do not lower to
6316 unsigned int ShuffleKind = isLittleEndian ? 2 : 0;
6317 if (PPC::isVPKUWUMShuffleMask(SVOp, ShuffleKind, DAG) ||
6318 PPC::isVPKUHUMShuffleMask(SVOp, ShuffleKind, DAG) ||
6319 PPC::isVSLDOIShuffleMask(SVOp, ShuffleKind, DAG) != -1 ||
6320 PPC::isVMRGLShuffleMask(SVOp, 1, ShuffleKind, DAG) ||
6321 PPC::isVMRGLShuffleMask(SVOp, 2, ShuffleKind, DAG) ||
6322 PPC::isVMRGLShuffleMask(SVOp, 4, ShuffleKind, DAG) ||
6323 PPC::isVMRGHShuffleMask(SVOp, 1, ShuffleKind, DAG) ||
6324 PPC::isVMRGHShuffleMask(SVOp, 2, ShuffleKind, DAG) ||
6325 PPC::isVMRGHShuffleMask(SVOp, 4, ShuffleKind, DAG))
6328 // Check to see if this is a shuffle of 4-byte values. If so, we can use our
6329 // perfect shuffle table to emit an optimal matching sequence.
6330 ArrayRef<int> PermMask = SVOp->getMask();
6332 unsigned PFIndexes[4];
6333 bool isFourElementShuffle = true;
6334 for (unsigned i = 0; i != 4 && isFourElementShuffle; ++i) { // Element number
6335 unsigned EltNo = 8; // Start out undef.
6336 for (unsigned j = 0; j != 4; ++j) { // Intra-element byte.
6337 if (PermMask[i*4+j] < 0)
6338 continue; // Undef, ignore it.
6340 unsigned ByteSource = PermMask[i*4+j];
6341 if ((ByteSource & 3) != j) {
6342 isFourElementShuffle = false;
6347 EltNo = ByteSource/4;
6348 } else if (EltNo != ByteSource/4) {
6349 isFourElementShuffle = false;
6353 PFIndexes[i] = EltNo;
6356 // If this shuffle can be expressed as a shuffle of 4-byte elements, use the
6357 // perfect shuffle vector to determine if it is cost effective to do this as
6358 // discrete instructions, or whether we should use a vperm.
6359 // For now, we skip this for little endian until such time as we have a
6360 // little-endian perfect shuffle table.
6361 if (isFourElementShuffle && !isLittleEndian) {
6362 // Compute the index in the perfect shuffle table.
6363 unsigned PFTableIndex =
6364 PFIndexes[0]*9*9*9+PFIndexes[1]*9*9+PFIndexes[2]*9+PFIndexes[3];
6366 unsigned PFEntry = PerfectShuffleTable[PFTableIndex];
6367 unsigned Cost = (PFEntry >> 30);
6369 // Determining when to avoid vperm is tricky. Many things affect the cost
6370 // of vperm, particularly how many times the perm mask needs to be computed.
6371 // For example, if the perm mask can be hoisted out of a loop or is already
6372 // used (perhaps because there are multiple permutes with the same shuffle
6373 // mask?) the vperm has a cost of 1. OTOH, hoisting the permute mask out of
6374 // the loop requires an extra register.
6376 // As a compromise, we only emit discrete instructions if the shuffle can be
6377 // generated in 3 or fewer operations. When we have loop information
6378 // available, if this block is within a loop, we should avoid using vperm
6379 // for 3-operation perms and use a constant pool load instead.
6381 return GeneratePerfectShuffle(PFEntry, V1, V2, DAG, dl);
6384 // Lower this to a VPERM(V1, V2, V3) expression, where V3 is a constant
6385 // vector that will get spilled to the constant pool.
6386 if (V2.getOpcode() == ISD::UNDEF) V2 = V1;
6388 // The SHUFFLE_VECTOR mask is almost exactly what we want for vperm, except
6389 // that it is in input element units, not in bytes. Convert now.
6391 // For little endian, the order of the input vectors is reversed, and
6392 // the permutation mask is complemented with respect to 31. This is
6393 // necessary to produce proper semantics with the big-endian-biased vperm
6395 EVT EltVT = V1.getValueType().getVectorElementType();
6396 unsigned BytesPerElement = EltVT.getSizeInBits()/8;
6398 SmallVector<SDValue, 16> ResultMask;
6399 for (unsigned i = 0, e = VT.getVectorNumElements(); i != e; ++i) {
6400 unsigned SrcElt = PermMask[i] < 0 ? 0 : PermMask[i];
6402 for (unsigned j = 0; j != BytesPerElement; ++j)
6404 ResultMask.push_back(DAG.getConstant(31 - (SrcElt*BytesPerElement+j),
6407 ResultMask.push_back(DAG.getConstant(SrcElt*BytesPerElement+j,
6411 SDValue VPermMask = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v16i8,
6414 return DAG.getNode(PPCISD::VPERM, dl, V1.getValueType(),
6417 return DAG.getNode(PPCISD::VPERM, dl, V1.getValueType(),
6421 /// getAltivecCompareInfo - Given an intrinsic, return false if it is not an
6422 /// altivec comparison. If it is, return true and fill in Opc/isDot with
6423 /// information about the intrinsic.
6424 static bool getAltivecCompareInfo(SDValue Intrin, int &CompareOpc,
6426 unsigned IntrinsicID =
6427 cast<ConstantSDNode>(Intrin.getOperand(0))->getZExtValue();
6430 switch (IntrinsicID) {
6431 default: return false;
6432 // Comparison predicates.
6433 case Intrinsic::ppc_altivec_vcmpbfp_p: CompareOpc = 966; isDot = 1; break;
6434 case Intrinsic::ppc_altivec_vcmpeqfp_p: CompareOpc = 198; isDot = 1; break;
6435 case Intrinsic::ppc_altivec_vcmpequb_p: CompareOpc = 6; isDot = 1; break;
6436 case Intrinsic::ppc_altivec_vcmpequh_p: CompareOpc = 70; isDot = 1; break;
6437 case Intrinsic::ppc_altivec_vcmpequw_p: CompareOpc = 134; isDot = 1; break;
6438 case Intrinsic::ppc_altivec_vcmpgefp_p: CompareOpc = 454; isDot = 1; break;
6439 case Intrinsic::ppc_altivec_vcmpgtfp_p: CompareOpc = 710; isDot = 1; break;
6440 case Intrinsic::ppc_altivec_vcmpgtsb_p: CompareOpc = 774; isDot = 1; break;
6441 case Intrinsic::ppc_altivec_vcmpgtsh_p: CompareOpc = 838; isDot = 1; break;
6442 case Intrinsic::ppc_altivec_vcmpgtsw_p: CompareOpc = 902; isDot = 1; break;
6443 case Intrinsic::ppc_altivec_vcmpgtub_p: CompareOpc = 518; isDot = 1; break;
6444 case Intrinsic::ppc_altivec_vcmpgtuh_p: CompareOpc = 582; isDot = 1; break;
6445 case Intrinsic::ppc_altivec_vcmpgtuw_p: CompareOpc = 646; isDot = 1; break;
6447 // Normal Comparisons.
6448 case Intrinsic::ppc_altivec_vcmpbfp: CompareOpc = 966; isDot = 0; break;
6449 case Intrinsic::ppc_altivec_vcmpeqfp: CompareOpc = 198; isDot = 0; break;
6450 case Intrinsic::ppc_altivec_vcmpequb: CompareOpc = 6; isDot = 0; break;
6451 case Intrinsic::ppc_altivec_vcmpequh: CompareOpc = 70; isDot = 0; break;
6452 case Intrinsic::ppc_altivec_vcmpequw: CompareOpc = 134; isDot = 0; break;
6453 case Intrinsic::ppc_altivec_vcmpgefp: CompareOpc = 454; isDot = 0; break;
6454 case Intrinsic::ppc_altivec_vcmpgtfp: CompareOpc = 710; isDot = 0; break;
6455 case Intrinsic::ppc_altivec_vcmpgtsb: CompareOpc = 774; isDot = 0; break;
6456 case Intrinsic::ppc_altivec_vcmpgtsh: CompareOpc = 838; isDot = 0; break;
6457 case Intrinsic::ppc_altivec_vcmpgtsw: CompareOpc = 902; isDot = 0; break;
6458 case Intrinsic::ppc_altivec_vcmpgtub: CompareOpc = 518; isDot = 0; break;
6459 case Intrinsic::ppc_altivec_vcmpgtuh: CompareOpc = 582; isDot = 0; break;
6460 case Intrinsic::ppc_altivec_vcmpgtuw: CompareOpc = 646; isDot = 0; break;
6465 /// LowerINTRINSIC_WO_CHAIN - If this is an intrinsic that we want to custom
6466 /// lower, do it, otherwise return null.
6467 SDValue PPCTargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op,
6468 SelectionDAG &DAG) const {
6469 // If this is a lowered altivec predicate compare, CompareOpc is set to the
6470 // opcode number of the comparison.
6474 if (!getAltivecCompareInfo(Op, CompareOpc, isDot))
6475 return SDValue(); // Don't custom lower most intrinsics.
6477 // If this is a non-dot comparison, make the VCMP node and we are done.
6479 SDValue Tmp = DAG.getNode(PPCISD::VCMP, dl, Op.getOperand(2).getValueType(),
6480 Op.getOperand(1), Op.getOperand(2),
6481 DAG.getConstant(CompareOpc, MVT::i32));
6482 return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), Tmp);
6485 // Create the PPCISD altivec 'dot' comparison node.
6487 Op.getOperand(2), // LHS
6488 Op.getOperand(3), // RHS
6489 DAG.getConstant(CompareOpc, MVT::i32)
6491 EVT VTs[] = { Op.getOperand(2).getValueType(), MVT::Glue };
6492 SDValue CompNode = DAG.getNode(PPCISD::VCMPo, dl, VTs, Ops);
6494 // Now that we have the comparison, emit a copy from the CR to a GPR.
6495 // This is flagged to the above dot comparison.
6496 SDValue Flags = DAG.getNode(PPCISD::MFOCRF, dl, MVT::i32,
6497 DAG.getRegister(PPC::CR6, MVT::i32),
6498 CompNode.getValue(1));
6500 // Unpack the result based on how the target uses it.
6501 unsigned BitNo; // Bit # of CR6.
6502 bool InvertBit; // Invert result?
6503 switch (cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue()) {
6504 default: // Can't happen, don't crash on invalid number though.
6505 case 0: // Return the value of the EQ bit of CR6.
6506 BitNo = 0; InvertBit = false;
6508 case 1: // Return the inverted value of the EQ bit of CR6.
6509 BitNo = 0; InvertBit = true;
6511 case 2: // Return the value of the LT bit of CR6.
6512 BitNo = 2; InvertBit = false;
6514 case 3: // Return the inverted value of the LT bit of CR6.
6515 BitNo = 2; InvertBit = true;
6519 // Shift the bit into the low position.
6520 Flags = DAG.getNode(ISD::SRL, dl, MVT::i32, Flags,
6521 DAG.getConstant(8-(3-BitNo), MVT::i32));
6523 Flags = DAG.getNode(ISD::AND, dl, MVT::i32, Flags,
6524 DAG.getConstant(1, MVT::i32));
6526 // If we are supposed to, toggle the bit.
6528 Flags = DAG.getNode(ISD::XOR, dl, MVT::i32, Flags,
6529 DAG.getConstant(1, MVT::i32));
6533 SDValue PPCTargetLowering::LowerSIGN_EXTEND_INREG(SDValue Op,
6534 SelectionDAG &DAG) const {
6536 // For v2i64 (VSX), we can pattern patch the v2i32 case (using fp <-> int
6537 // instructions), but for smaller types, we need to first extend up to v2i32
6538 // before doing going farther.
6539 if (Op.getValueType() == MVT::v2i64) {
6540 EVT ExtVT = cast<VTSDNode>(Op.getOperand(1))->getVT();
6541 if (ExtVT != MVT::v2i32) {
6542 Op = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, Op.getOperand(0));
6543 Op = DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, MVT::v4i32, Op,
6544 DAG.getValueType(EVT::getVectorVT(*DAG.getContext(),
6545 ExtVT.getVectorElementType(), 4)));
6546 Op = DAG.getNode(ISD::BITCAST, dl, MVT::v2i64, Op);
6547 Op = DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, MVT::v2i64, Op,
6548 DAG.getValueType(MVT::v2i32));
6557 SDValue PPCTargetLowering::LowerSCALAR_TO_VECTOR(SDValue Op,
6558 SelectionDAG &DAG) const {
6560 // Create a stack slot that is 16-byte aligned.
6561 MachineFrameInfo *FrameInfo = DAG.getMachineFunction().getFrameInfo();
6562 int FrameIdx = FrameInfo->CreateStackObject(16, 16, false);
6563 EVT PtrVT = getPointerTy();
6564 SDValue FIdx = DAG.getFrameIndex(FrameIdx, PtrVT);
6566 // Store the input value into Value#0 of the stack slot.
6567 SDValue Store = DAG.getStore(DAG.getEntryNode(), dl,
6568 Op.getOperand(0), FIdx, MachinePointerInfo(),
6571 return DAG.getLoad(Op.getValueType(), dl, Store, FIdx, MachinePointerInfo(),
6572 false, false, false, 0);
6575 SDValue PPCTargetLowering::LowerMUL(SDValue Op, SelectionDAG &DAG) const {
6577 if (Op.getValueType() == MVT::v4i32) {
6578 SDValue LHS = Op.getOperand(0), RHS = Op.getOperand(1);
6580 SDValue Zero = BuildSplatI( 0, 1, MVT::v4i32, DAG, dl);
6581 SDValue Neg16 = BuildSplatI(-16, 4, MVT::v4i32, DAG, dl);//+16 as shift amt.
6583 SDValue RHSSwap = // = vrlw RHS, 16
6584 BuildIntrinsicOp(Intrinsic::ppc_altivec_vrlw, RHS, Neg16, DAG, dl);
6586 // Shrinkify inputs to v8i16.
6587 LHS = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, LHS);
6588 RHS = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, RHS);
6589 RHSSwap = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, RHSSwap);
6591 // Low parts multiplied together, generating 32-bit results (we ignore the
6593 SDValue LoProd = BuildIntrinsicOp(Intrinsic::ppc_altivec_vmulouh,
6594 LHS, RHS, DAG, dl, MVT::v4i32);
6596 SDValue HiProd = BuildIntrinsicOp(Intrinsic::ppc_altivec_vmsumuhm,
6597 LHS, RHSSwap, Zero, DAG, dl, MVT::v4i32);
6598 // Shift the high parts up 16 bits.
6599 HiProd = BuildIntrinsicOp(Intrinsic::ppc_altivec_vslw, HiProd,
6601 return DAG.getNode(ISD::ADD, dl, MVT::v4i32, LoProd, HiProd);
6602 } else if (Op.getValueType() == MVT::v8i16) {
6603 SDValue LHS = Op.getOperand(0), RHS = Op.getOperand(1);
6605 SDValue Zero = BuildSplatI(0, 1, MVT::v8i16, DAG, dl);
6607 return BuildIntrinsicOp(Intrinsic::ppc_altivec_vmladduhm,
6608 LHS, RHS, Zero, DAG, dl);
6609 } else if (Op.getValueType() == MVT::v16i8) {
6610 SDValue LHS = Op.getOperand(0), RHS = Op.getOperand(1);
6611 bool isLittleEndian = Subtarget.isLittleEndian();
6613 // Multiply the even 8-bit parts, producing 16-bit sums.
6614 SDValue EvenParts = BuildIntrinsicOp(Intrinsic::ppc_altivec_vmuleub,
6615 LHS, RHS, DAG, dl, MVT::v8i16);
6616 EvenParts = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, EvenParts);
6618 // Multiply the odd 8-bit parts, producing 16-bit sums.
6619 SDValue OddParts = BuildIntrinsicOp(Intrinsic::ppc_altivec_vmuloub,
6620 LHS, RHS, DAG, dl, MVT::v8i16);
6621 OddParts = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, OddParts);
6623 // Merge the results together. Because vmuleub and vmuloub are
6624 // instructions with a big-endian bias, we must reverse the
6625 // element numbering and reverse the meaning of "odd" and "even"
6626 // when generating little endian code.
6628 for (unsigned i = 0; i != 8; ++i) {
6629 if (isLittleEndian) {
6631 Ops[i*2+1] = 2*i+16;
6634 Ops[i*2+1] = 2*i+1+16;
6638 return DAG.getVectorShuffle(MVT::v16i8, dl, OddParts, EvenParts, Ops);
6640 return DAG.getVectorShuffle(MVT::v16i8, dl, EvenParts, OddParts, Ops);
6642 llvm_unreachable("Unknown mul to lower!");
6646 /// LowerOperation - Provide custom lowering hooks for some operations.
6648 SDValue PPCTargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const {
6649 switch (Op.getOpcode()) {
6650 default: llvm_unreachable("Wasn't expecting to be able to lower this!");
6651 case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
6652 case ISD::BlockAddress: return LowerBlockAddress(Op, DAG);
6653 case ISD::GlobalAddress: return LowerGlobalAddress(Op, DAG);
6654 case ISD::GlobalTLSAddress: return LowerGlobalTLSAddress(Op, DAG);
6655 case ISD::JumpTable: return LowerJumpTable(Op, DAG);
6656 case ISD::SETCC: return LowerSETCC(Op, DAG);
6657 case ISD::INIT_TRAMPOLINE: return LowerINIT_TRAMPOLINE(Op, DAG);
6658 case ISD::ADJUST_TRAMPOLINE: return LowerADJUST_TRAMPOLINE(Op, DAG);
6660 return LowerVASTART(Op, DAG, Subtarget);
6663 return LowerVAARG(Op, DAG, Subtarget);
6666 return LowerVACOPY(Op, DAG, Subtarget);
6668 case ISD::STACKRESTORE: return LowerSTACKRESTORE(Op, DAG, Subtarget);
6669 case ISD::DYNAMIC_STACKALLOC:
6670 return LowerDYNAMIC_STACKALLOC(Op, DAG, Subtarget);
6672 case ISD::EH_SJLJ_SETJMP: return lowerEH_SJLJ_SETJMP(Op, DAG);
6673 case ISD::EH_SJLJ_LONGJMP: return lowerEH_SJLJ_LONGJMP(Op, DAG);
6675 case ISD::LOAD: return LowerLOAD(Op, DAG);
6676 case ISD::STORE: return LowerSTORE(Op, DAG);
6677 case ISD::TRUNCATE: return LowerTRUNCATE(Op, DAG);
6678 case ISD::SELECT_CC: return LowerSELECT_CC(Op, DAG);
6679 case ISD::FP_TO_UINT:
6680 case ISD::FP_TO_SINT: return LowerFP_TO_INT(Op, DAG,
6682 case ISD::UINT_TO_FP:
6683 case ISD::SINT_TO_FP: return LowerINT_TO_FP(Op, DAG);
6684 case ISD::FLT_ROUNDS_: return LowerFLT_ROUNDS_(Op, DAG);
6686 // Lower 64-bit shifts.
6687 case ISD::SHL_PARTS: return LowerSHL_PARTS(Op, DAG);
6688 case ISD::SRL_PARTS: return LowerSRL_PARTS(Op, DAG);
6689 case ISD::SRA_PARTS: return LowerSRA_PARTS(Op, DAG);
6691 // Vector-related lowering.
6692 case ISD::BUILD_VECTOR: return LowerBUILD_VECTOR(Op, DAG);
6693 case ISD::VECTOR_SHUFFLE: return LowerVECTOR_SHUFFLE(Op, DAG);
6694 case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG);
6695 case ISD::SCALAR_TO_VECTOR: return LowerSCALAR_TO_VECTOR(Op, DAG);
6696 case ISD::SIGN_EXTEND_INREG: return LowerSIGN_EXTEND_INREG(Op, DAG);
6697 case ISD::MUL: return LowerMUL(Op, DAG);
6699 // For counter-based loop handling.
6700 case ISD::INTRINSIC_W_CHAIN: return SDValue();
6702 // Frame & Return address.
6703 case ISD::RETURNADDR: return LowerRETURNADDR(Op, DAG);
6704 case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
6708 void PPCTargetLowering::ReplaceNodeResults(SDNode *N,
6709 SmallVectorImpl<SDValue>&Results,
6710 SelectionDAG &DAG) const {
6711 const TargetMachine &TM = getTargetMachine();
6713 switch (N->getOpcode()) {
6715 llvm_unreachable("Do not know how to custom type legalize this operation!");
6716 case ISD::READCYCLECOUNTER: {
6717 SDVTList VTs = DAG.getVTList(MVT::i32, MVT::i32, MVT::Other);
6718 SDValue RTB = DAG.getNode(PPCISD::READ_TIME_BASE, dl, VTs, N->getOperand(0));
6720 Results.push_back(RTB);
6721 Results.push_back(RTB.getValue(1));
6722 Results.push_back(RTB.getValue(2));
6725 case ISD::INTRINSIC_W_CHAIN: {
6726 if (cast<ConstantSDNode>(N->getOperand(1))->getZExtValue() !=
6727 Intrinsic::ppc_is_decremented_ctr_nonzero)
6730 assert(N->getValueType(0) == MVT::i1 &&
6731 "Unexpected result type for CTR decrement intrinsic");
6732 EVT SVT = getSetCCResultType(*DAG.getContext(), N->getValueType(0));
6733 SDVTList VTs = DAG.getVTList(SVT, MVT::Other);
6734 SDValue NewInt = DAG.getNode(N->getOpcode(), dl, VTs, N->getOperand(0),
6737 Results.push_back(NewInt);
6738 Results.push_back(NewInt.getValue(1));
6742 if (!TM.getSubtarget<PPCSubtarget>().isSVR4ABI()
6743 || TM.getSubtarget<PPCSubtarget>().isPPC64())
6746 EVT VT = N->getValueType(0);
6748 if (VT == MVT::i64) {
6749 SDValue NewNode = LowerVAARG(SDValue(N, 1), DAG, Subtarget);
6751 Results.push_back(NewNode);
6752 Results.push_back(NewNode.getValue(1));
6756 case ISD::FP_ROUND_INREG: {
6757 assert(N->getValueType(0) == MVT::ppcf128);
6758 assert(N->getOperand(0).getValueType() == MVT::ppcf128);
6759 SDValue Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, dl,
6760 MVT::f64, N->getOperand(0),
6761 DAG.getIntPtrConstant(0));
6762 SDValue Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, dl,
6763 MVT::f64, N->getOperand(0),
6764 DAG.getIntPtrConstant(1));
6766 // Add the two halves of the long double in round-to-zero mode.
6767 SDValue FPreg = DAG.getNode(PPCISD::FADDRTZ, dl, MVT::f64, Lo, Hi);
6769 // We know the low half is about to be thrown away, so just use something
6771 Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, MVT::ppcf128,
6775 case ISD::FP_TO_SINT:
6776 // LowerFP_TO_INT() can only handle f32 and f64.
6777 if (N->getOperand(0).getValueType() == MVT::ppcf128)
6779 Results.push_back(LowerFP_TO_INT(SDValue(N, 0), DAG, dl));
6785 //===----------------------------------------------------------------------===//
6786 // Other Lowering Code
6787 //===----------------------------------------------------------------------===//
6789 static Instruction* callIntrinsic(IRBuilder<> &Builder, Intrinsic::ID Id) {
6790 Module *M = Builder.GetInsertBlock()->getParent()->getParent();
6791 Function *Func = Intrinsic::getDeclaration(M, Id);
6792 return Builder.CreateCall(Func);
6795 // The mappings for emitLeading/TrailingFence is taken from
6796 // http://www.cl.cam.ac.uk/~pes20/cpp/cpp0xmappings.html
6797 Instruction* PPCTargetLowering::emitLeadingFence(IRBuilder<> &Builder,
6798 AtomicOrdering Ord, bool IsStore,
6799 bool IsLoad) const {
6800 if (Ord == SequentiallyConsistent)
6801 return callIntrinsic(Builder, Intrinsic::ppc_sync);
6802 else if (isAtLeastRelease(Ord))
6803 return callIntrinsic(Builder, Intrinsic::ppc_lwsync);
6808 Instruction* PPCTargetLowering::emitTrailingFence(IRBuilder<> &Builder,
6809 AtomicOrdering Ord, bool IsStore,
6810 bool IsLoad) const {
6811 if (IsLoad && isAtLeastAcquire(Ord))
6812 return callIntrinsic(Builder, Intrinsic::ppc_lwsync);
6813 // FIXME: this is too conservative, a dependent branch + isync is enough.
6814 // See http://www.cl.cam.ac.uk/~pes20/cpp/cpp0xmappings.html and
6815 // http://www.rdrop.com/users/paulmck/scalability/paper/N2745r.2011.03.04a.html
6816 // and http://www.cl.cam.ac.uk/~pes20/cppppc/ for justification.
6822 PPCTargetLowering::EmitAtomicBinary(MachineInstr *MI, MachineBasicBlock *BB,
6823 bool is64bit, unsigned BinOpcode) const {
6824 // This also handles ATOMIC_SWAP, indicated by BinOpcode==0.
6825 const TargetInstrInfo *TII =
6826 getTargetMachine().getSubtargetImpl()->getInstrInfo();
6828 const BasicBlock *LLVM_BB = BB->getBasicBlock();
6829 MachineFunction *F = BB->getParent();
6830 MachineFunction::iterator It = BB;
6833 unsigned dest = MI->getOperand(0).getReg();
6834 unsigned ptrA = MI->getOperand(1).getReg();
6835 unsigned ptrB = MI->getOperand(2).getReg();
6836 unsigned incr = MI->getOperand(3).getReg();
6837 DebugLoc dl = MI->getDebugLoc();
6839 MachineBasicBlock *loopMBB = F->CreateMachineBasicBlock(LLVM_BB);
6840 MachineBasicBlock *exitMBB = F->CreateMachineBasicBlock(LLVM_BB);
6841 F->insert(It, loopMBB);
6842 F->insert(It, exitMBB);
6843 exitMBB->splice(exitMBB->begin(), BB,
6844 std::next(MachineBasicBlock::iterator(MI)), BB->end());
6845 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
6847 MachineRegisterInfo &RegInfo = F->getRegInfo();
6848 unsigned TmpReg = (!BinOpcode) ? incr :
6849 RegInfo.createVirtualRegister( is64bit ? &PPC::G8RCRegClass
6850 : &PPC::GPRCRegClass);
6854 // fallthrough --> loopMBB
6855 BB->addSuccessor(loopMBB);
6858 // l[wd]arx dest, ptr
6859 // add r0, dest, incr
6860 // st[wd]cx. r0, ptr
6862 // fallthrough --> exitMBB
6864 BuildMI(BB, dl, TII->get(is64bit ? PPC::LDARX : PPC::LWARX), dest)
6865 .addReg(ptrA).addReg(ptrB);
6867 BuildMI(BB, dl, TII->get(BinOpcode), TmpReg).addReg(incr).addReg(dest);
6868 BuildMI(BB, dl, TII->get(is64bit ? PPC::STDCX : PPC::STWCX))
6869 .addReg(TmpReg).addReg(ptrA).addReg(ptrB);
6870 BuildMI(BB, dl, TII->get(PPC::BCC))
6871 .addImm(PPC::PRED_NE).addReg(PPC::CR0).addMBB(loopMBB);
6872 BB->addSuccessor(loopMBB);
6873 BB->addSuccessor(exitMBB);
6882 PPCTargetLowering::EmitPartwordAtomicBinary(MachineInstr *MI,
6883 MachineBasicBlock *BB,
6884 bool is8bit, // operation
6885 unsigned BinOpcode) const {
6886 // This also handles ATOMIC_SWAP, indicated by BinOpcode==0.
6887 const TargetInstrInfo *TII =
6888 getTargetMachine().getSubtargetImpl()->getInstrInfo();
6889 // In 64 bit mode we have to use 64 bits for addresses, even though the
6890 // lwarx/stwcx are 32 bits. With the 32-bit atomics we can use address
6891 // registers without caring whether they're 32 or 64, but here we're
6892 // doing actual arithmetic on the addresses.
6893 bool is64bit = Subtarget.isPPC64();
6894 unsigned ZeroReg = is64bit ? PPC::ZERO8 : PPC::ZERO;
6896 const BasicBlock *LLVM_BB = BB->getBasicBlock();
6897 MachineFunction *F = BB->getParent();
6898 MachineFunction::iterator It = BB;
6901 unsigned dest = MI->getOperand(0).getReg();
6902 unsigned ptrA = MI->getOperand(1).getReg();
6903 unsigned ptrB = MI->getOperand(2).getReg();
6904 unsigned incr = MI->getOperand(3).getReg();
6905 DebugLoc dl = MI->getDebugLoc();
6907 MachineBasicBlock *loopMBB = F->CreateMachineBasicBlock(LLVM_BB);
6908 MachineBasicBlock *exitMBB = F->CreateMachineBasicBlock(LLVM_BB);
6909 F->insert(It, loopMBB);
6910 F->insert(It, exitMBB);
6911 exitMBB->splice(exitMBB->begin(), BB,
6912 std::next(MachineBasicBlock::iterator(MI)), BB->end());
6913 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
6915 MachineRegisterInfo &RegInfo = F->getRegInfo();
6916 const TargetRegisterClass *RC = is64bit ? &PPC::G8RCRegClass
6917 : &PPC::GPRCRegClass;
6918 unsigned PtrReg = RegInfo.createVirtualRegister(RC);
6919 unsigned Shift1Reg = RegInfo.createVirtualRegister(RC);
6920 unsigned ShiftReg = RegInfo.createVirtualRegister(RC);
6921 unsigned Incr2Reg = RegInfo.createVirtualRegister(RC);
6922 unsigned MaskReg = RegInfo.createVirtualRegister(RC);
6923 unsigned Mask2Reg = RegInfo.createVirtualRegister(RC);
6924 unsigned Mask3Reg = RegInfo.createVirtualRegister(RC);
6925 unsigned Tmp2Reg = RegInfo.createVirtualRegister(RC);
6926 unsigned Tmp3Reg = RegInfo.createVirtualRegister(RC);
6927 unsigned Tmp4Reg = RegInfo.createVirtualRegister(RC);
6928 unsigned TmpDestReg = RegInfo.createVirtualRegister(RC);
6930 unsigned TmpReg = (!BinOpcode) ? Incr2Reg : RegInfo.createVirtualRegister(RC);
6934 // fallthrough --> loopMBB
6935 BB->addSuccessor(loopMBB);
6937 // The 4-byte load must be aligned, while a char or short may be
6938 // anywhere in the word. Hence all this nasty bookkeeping code.
6939 // add ptr1, ptrA, ptrB [copy if ptrA==0]
6940 // rlwinm shift1, ptr1, 3, 27, 28 [3, 27, 27]
6941 // xori shift, shift1, 24 [16]
6942 // rlwinm ptr, ptr1, 0, 0, 29
6943 // slw incr2, incr, shift
6944 // li mask2, 255 [li mask3, 0; ori mask2, mask3, 65535]
6945 // slw mask, mask2, shift
6947 // lwarx tmpDest, ptr
6948 // add tmp, tmpDest, incr2
6949 // andc tmp2, tmpDest, mask
6950 // and tmp3, tmp, mask
6951 // or tmp4, tmp3, tmp2
6954 // fallthrough --> exitMBB
6955 // srw dest, tmpDest, shift
6956 if (ptrA != ZeroReg) {
6957 Ptr1Reg = RegInfo.createVirtualRegister(RC);
6958 BuildMI(BB, dl, TII->get(is64bit ? PPC::ADD8 : PPC::ADD4), Ptr1Reg)
6959 .addReg(ptrA).addReg(ptrB);
6963 BuildMI(BB, dl, TII->get(PPC::RLWINM), Shift1Reg).addReg(Ptr1Reg)
6964 .addImm(3).addImm(27).addImm(is8bit ? 28 : 27);
6965 BuildMI(BB, dl, TII->get(is64bit ? PPC::XORI8 : PPC::XORI), ShiftReg)
6966 .addReg(Shift1Reg).addImm(is8bit ? 24 : 16);
6968 BuildMI(BB, dl, TII->get(PPC::RLDICR), PtrReg)
6969 .addReg(Ptr1Reg).addImm(0).addImm(61);
6971 BuildMI(BB, dl, TII->get(PPC::RLWINM), PtrReg)
6972 .addReg(Ptr1Reg).addImm(0).addImm(0).addImm(29);
6973 BuildMI(BB, dl, TII->get(PPC::SLW), Incr2Reg)
6974 .addReg(incr).addReg(ShiftReg);
6976 BuildMI(BB, dl, TII->get(PPC::LI), Mask2Reg).addImm(255);
6978 BuildMI(BB, dl, TII->get(PPC::LI), Mask3Reg).addImm(0);
6979 BuildMI(BB, dl, TII->get(PPC::ORI),Mask2Reg).addReg(Mask3Reg).addImm(65535);
6981 BuildMI(BB, dl, TII->get(PPC::SLW), MaskReg)
6982 .addReg(Mask2Reg).addReg(ShiftReg);
6985 BuildMI(BB, dl, TII->get(PPC::LWARX), TmpDestReg)
6986 .addReg(ZeroReg).addReg(PtrReg);
6988 BuildMI(BB, dl, TII->get(BinOpcode), TmpReg)
6989 .addReg(Incr2Reg).addReg(TmpDestReg);
6990 BuildMI(BB, dl, TII->get(is64bit ? PPC::ANDC8 : PPC::ANDC), Tmp2Reg)
6991 .addReg(TmpDestReg).addReg(MaskReg);
6992 BuildMI(BB, dl, TII->get(is64bit ? PPC::AND8 : PPC::AND), Tmp3Reg)
6993 .addReg(TmpReg).addReg(MaskReg);
6994 BuildMI(BB, dl, TII->get(is64bit ? PPC::OR8 : PPC::OR), Tmp4Reg)
6995 .addReg(Tmp3Reg).addReg(Tmp2Reg);
6996 BuildMI(BB, dl, TII->get(PPC::STWCX))
6997 .addReg(Tmp4Reg).addReg(ZeroReg).addReg(PtrReg);
6998 BuildMI(BB, dl, TII->get(PPC::BCC))
6999 .addImm(PPC::PRED_NE).addReg(PPC::CR0).addMBB(loopMBB);
7000 BB->addSuccessor(loopMBB);
7001 BB->addSuccessor(exitMBB);
7006 BuildMI(*BB, BB->begin(), dl, TII->get(PPC::SRW), dest).addReg(TmpDestReg)
7011 llvm::MachineBasicBlock*
7012 PPCTargetLowering::emitEHSjLjSetJmp(MachineInstr *MI,
7013 MachineBasicBlock *MBB) const {
7014 DebugLoc DL = MI->getDebugLoc();
7015 const TargetInstrInfo *TII =
7016 getTargetMachine().getSubtargetImpl()->getInstrInfo();
7018 MachineFunction *MF = MBB->getParent();
7019 MachineRegisterInfo &MRI = MF->getRegInfo();
7021 const BasicBlock *BB = MBB->getBasicBlock();
7022 MachineFunction::iterator I = MBB;
7026 MachineInstr::mmo_iterator MMOBegin = MI->memoperands_begin();
7027 MachineInstr::mmo_iterator MMOEnd = MI->memoperands_end();
7029 unsigned DstReg = MI->getOperand(0).getReg();
7030 const TargetRegisterClass *RC = MRI.getRegClass(DstReg);
7031 assert(RC->hasType(MVT::i32) && "Invalid destination!");
7032 unsigned mainDstReg = MRI.createVirtualRegister(RC);
7033 unsigned restoreDstReg = MRI.createVirtualRegister(RC);
7035 MVT PVT = getPointerTy();
7036 assert((PVT == MVT::i64 || PVT == MVT::i32) &&
7037 "Invalid Pointer Size!");
7038 // For v = setjmp(buf), we generate
7041 // SjLjSetup mainMBB
7047 // buf[LabelOffset] = LR
7051 // v = phi(main, restore)
7054 MachineBasicBlock *thisMBB = MBB;
7055 MachineBasicBlock *mainMBB = MF->CreateMachineBasicBlock(BB);
7056 MachineBasicBlock *sinkMBB = MF->CreateMachineBasicBlock(BB);
7057 MF->insert(I, mainMBB);
7058 MF->insert(I, sinkMBB);
7060 MachineInstrBuilder MIB;
7062 // Transfer the remainder of BB and its successor edges to sinkMBB.
7063 sinkMBB->splice(sinkMBB->begin(), MBB,
7064 std::next(MachineBasicBlock::iterator(MI)), MBB->end());
7065 sinkMBB->transferSuccessorsAndUpdatePHIs(MBB);
7067 // Note that the structure of the jmp_buf used here is not compatible
7068 // with that used by libc, and is not designed to be. Specifically, it
7069 // stores only those 'reserved' registers that LLVM does not otherwise
7070 // understand how to spill. Also, by convention, by the time this
7071 // intrinsic is called, Clang has already stored the frame address in the
7072 // first slot of the buffer and stack address in the third. Following the
7073 // X86 target code, we'll store the jump address in the second slot. We also
7074 // need to save the TOC pointer (R2) to handle jumps between shared
7075 // libraries, and that will be stored in the fourth slot. The thread
7076 // identifier (R13) is not affected.
7079 const int64_t LabelOffset = 1 * PVT.getStoreSize();
7080 const int64_t TOCOffset = 3 * PVT.getStoreSize();
7081 const int64_t BPOffset = 4 * PVT.getStoreSize();
7083 // Prepare IP either in reg.
7084 const TargetRegisterClass *PtrRC = getRegClassFor(PVT);
7085 unsigned LabelReg = MRI.createVirtualRegister(PtrRC);
7086 unsigned BufReg = MI->getOperand(1).getReg();
7088 if (Subtarget.isPPC64() && Subtarget.isSVR4ABI()) {
7089 MIB = BuildMI(*thisMBB, MI, DL, TII->get(PPC::STD))
7093 MIB.setMemRefs(MMOBegin, MMOEnd);
7096 // Naked functions never have a base pointer, and so we use r1. For all
7097 // other functions, this decision must be delayed until during PEI.
7099 if (MF->getFunction()->getAttributes().hasAttribute(
7100 AttributeSet::FunctionIndex, Attribute::Naked))
7101 BaseReg = Subtarget.isPPC64() ? PPC::X1 : PPC::R1;
7103 BaseReg = Subtarget.isPPC64() ? PPC::BP8 : PPC::BP;
7105 MIB = BuildMI(*thisMBB, MI, DL,
7106 TII->get(Subtarget.isPPC64() ? PPC::STD : PPC::STW))
7110 MIB.setMemRefs(MMOBegin, MMOEnd);
7113 MIB = BuildMI(*thisMBB, MI, DL, TII->get(PPC::BCLalways)).addMBB(mainMBB);
7114 const PPCRegisterInfo *TRI =
7115 getTargetMachine().getSubtarget<PPCSubtarget>().getRegisterInfo();
7116 MIB.addRegMask(TRI->getNoPreservedMask());
7118 BuildMI(*thisMBB, MI, DL, TII->get(PPC::LI), restoreDstReg).addImm(1);
7120 MIB = BuildMI(*thisMBB, MI, DL, TII->get(PPC::EH_SjLj_Setup))
7122 MIB = BuildMI(*thisMBB, MI, DL, TII->get(PPC::B)).addMBB(sinkMBB);
7124 thisMBB->addSuccessor(mainMBB, /* weight */ 0);
7125 thisMBB->addSuccessor(sinkMBB, /* weight */ 1);
7129 MIB = BuildMI(mainMBB, DL,
7130 TII->get(Subtarget.isPPC64() ? PPC::MFLR8 : PPC::MFLR), LabelReg);
7133 if (Subtarget.isPPC64()) {
7134 MIB = BuildMI(mainMBB, DL, TII->get(PPC::STD))
7136 .addImm(LabelOffset)
7139 MIB = BuildMI(mainMBB, DL, TII->get(PPC::STW))
7141 .addImm(LabelOffset)
7145 MIB.setMemRefs(MMOBegin, MMOEnd);
7147 BuildMI(mainMBB, DL, TII->get(PPC::LI), mainDstReg).addImm(0);
7148 mainMBB->addSuccessor(sinkMBB);
7151 BuildMI(*sinkMBB, sinkMBB->begin(), DL,
7152 TII->get(PPC::PHI), DstReg)
7153 .addReg(mainDstReg).addMBB(mainMBB)
7154 .addReg(restoreDstReg).addMBB(thisMBB);
7156 MI->eraseFromParent();
7161 PPCTargetLowering::emitEHSjLjLongJmp(MachineInstr *MI,
7162 MachineBasicBlock *MBB) const {
7163 DebugLoc DL = MI->getDebugLoc();
7164 const TargetInstrInfo *TII =
7165 getTargetMachine().getSubtargetImpl()->getInstrInfo();
7167 MachineFunction *MF = MBB->getParent();
7168 MachineRegisterInfo &MRI = MF->getRegInfo();
7171 MachineInstr::mmo_iterator MMOBegin = MI->memoperands_begin();
7172 MachineInstr::mmo_iterator MMOEnd = MI->memoperands_end();
7174 MVT PVT = getPointerTy();
7175 assert((PVT == MVT::i64 || PVT == MVT::i32) &&
7176 "Invalid Pointer Size!");
7178 const TargetRegisterClass *RC =
7179 (PVT == MVT::i64) ? &PPC::G8RCRegClass : &PPC::GPRCRegClass;
7180 unsigned Tmp = MRI.createVirtualRegister(RC);
7181 // Since FP is only updated here but NOT referenced, it's treated as GPR.
7182 unsigned FP = (PVT == MVT::i64) ? PPC::X31 : PPC::R31;
7183 unsigned SP = (PVT == MVT::i64) ? PPC::X1 : PPC::R1;
7184 unsigned BP = (PVT == MVT::i64) ? PPC::X30 :
7185 (Subtarget.isSVR4ABI() &&
7186 MF->getTarget().getRelocationModel() == Reloc::PIC_ ?
7187 PPC::R29 : PPC::R30);
7189 MachineInstrBuilder MIB;
7191 const int64_t LabelOffset = 1 * PVT.getStoreSize();
7192 const int64_t SPOffset = 2 * PVT.getStoreSize();
7193 const int64_t TOCOffset = 3 * PVT.getStoreSize();
7194 const int64_t BPOffset = 4 * PVT.getStoreSize();
7196 unsigned BufReg = MI->getOperand(0).getReg();
7198 // Reload FP (the jumped-to function may not have had a
7199 // frame pointer, and if so, then its r31 will be restored
7201 if (PVT == MVT::i64) {
7202 MIB = BuildMI(*MBB, MI, DL, TII->get(PPC::LD), FP)
7206 MIB = BuildMI(*MBB, MI, DL, TII->get(PPC::LWZ), FP)
7210 MIB.setMemRefs(MMOBegin, MMOEnd);
7213 if (PVT == MVT::i64) {
7214 MIB = BuildMI(*MBB, MI, DL, TII->get(PPC::LD), Tmp)
7215 .addImm(LabelOffset)
7218 MIB = BuildMI(*MBB, MI, DL, TII->get(PPC::LWZ), Tmp)
7219 .addImm(LabelOffset)
7222 MIB.setMemRefs(MMOBegin, MMOEnd);
7225 if (PVT == MVT::i64) {
7226 MIB = BuildMI(*MBB, MI, DL, TII->get(PPC::LD), SP)
7230 MIB = BuildMI(*MBB, MI, DL, TII->get(PPC::LWZ), SP)
7234 MIB.setMemRefs(MMOBegin, MMOEnd);
7237 if (PVT == MVT::i64) {
7238 MIB = BuildMI(*MBB, MI, DL, TII->get(PPC::LD), BP)
7242 MIB = BuildMI(*MBB, MI, DL, TII->get(PPC::LWZ), BP)
7246 MIB.setMemRefs(MMOBegin, MMOEnd);
7249 if (PVT == MVT::i64 && Subtarget.isSVR4ABI()) {
7250 MIB = BuildMI(*MBB, MI, DL, TII->get(PPC::LD), PPC::X2)
7254 MIB.setMemRefs(MMOBegin, MMOEnd);
7258 BuildMI(*MBB, MI, DL,
7259 TII->get(PVT == MVT::i64 ? PPC::MTCTR8 : PPC::MTCTR)).addReg(Tmp);
7260 BuildMI(*MBB, MI, DL, TII->get(PVT == MVT::i64 ? PPC::BCTR8 : PPC::BCTR));
7262 MI->eraseFromParent();
7267 PPCTargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
7268 MachineBasicBlock *BB) const {
7269 if (MI->getOpcode() == TargetOpcode::STACKMAP ||
7270 MI->getOpcode() == TargetOpcode::PATCHPOINT)
7271 return emitPatchPoint(MI, BB);
7273 if (MI->getOpcode() == PPC::EH_SjLj_SetJmp32 ||
7274 MI->getOpcode() == PPC::EH_SjLj_SetJmp64) {
7275 return emitEHSjLjSetJmp(MI, BB);
7276 } else if (MI->getOpcode() == PPC::EH_SjLj_LongJmp32 ||
7277 MI->getOpcode() == PPC::EH_SjLj_LongJmp64) {
7278 return emitEHSjLjLongJmp(MI, BB);
7281 const TargetInstrInfo *TII =
7282 getTargetMachine().getSubtargetImpl()->getInstrInfo();
7284 // To "insert" these instructions we actually have to insert their
7285 // control-flow patterns.
7286 const BasicBlock *LLVM_BB = BB->getBasicBlock();
7287 MachineFunction::iterator It = BB;
7290 MachineFunction *F = BB->getParent();
7292 if (Subtarget.hasISEL() && (MI->getOpcode() == PPC::SELECT_CC_I4 ||
7293 MI->getOpcode() == PPC::SELECT_CC_I8 ||
7294 MI->getOpcode() == PPC::SELECT_I4 ||
7295 MI->getOpcode() == PPC::SELECT_I8)) {
7296 SmallVector<MachineOperand, 2> Cond;
7297 if (MI->getOpcode() == PPC::SELECT_CC_I4 ||
7298 MI->getOpcode() == PPC::SELECT_CC_I8)
7299 Cond.push_back(MI->getOperand(4));
7301 Cond.push_back(MachineOperand::CreateImm(PPC::PRED_BIT_SET));
7302 Cond.push_back(MI->getOperand(1));
7304 DebugLoc dl = MI->getDebugLoc();
7305 const TargetInstrInfo *TII =
7306 getTargetMachine().getSubtargetImpl()->getInstrInfo();
7307 TII->insertSelect(*BB, MI, dl, MI->getOperand(0).getReg(),
7308 Cond, MI->getOperand(2).getReg(),
7309 MI->getOperand(3).getReg());
7310 } else if (MI->getOpcode() == PPC::SELECT_CC_I4 ||
7311 MI->getOpcode() == PPC::SELECT_CC_I8 ||
7312 MI->getOpcode() == PPC::SELECT_CC_F4 ||
7313 MI->getOpcode() == PPC::SELECT_CC_F8 ||
7314 MI->getOpcode() == PPC::SELECT_CC_VRRC ||
7315 MI->getOpcode() == PPC::SELECT_CC_VSFRC ||
7316 MI->getOpcode() == PPC::SELECT_CC_VSRC ||
7317 MI->getOpcode() == PPC::SELECT_I4 ||
7318 MI->getOpcode() == PPC::SELECT_I8 ||
7319 MI->getOpcode() == PPC::SELECT_F4 ||
7320 MI->getOpcode() == PPC::SELECT_F8 ||
7321 MI->getOpcode() == PPC::SELECT_VRRC ||
7322 MI->getOpcode() == PPC::SELECT_VSFRC ||
7323 MI->getOpcode() == PPC::SELECT_VSRC) {
7324 // The incoming instruction knows the destination vreg to set, the
7325 // condition code register to branch on, the true/false values to
7326 // select between, and a branch opcode to use.
7331 // cmpTY ccX, r1, r2
7333 // fallthrough --> copy0MBB
7334 MachineBasicBlock *thisMBB = BB;
7335 MachineBasicBlock *copy0MBB = F->CreateMachineBasicBlock(LLVM_BB);
7336 MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);
7337 DebugLoc dl = MI->getDebugLoc();
7338 F->insert(It, copy0MBB);
7339 F->insert(It, sinkMBB);
7341 // Transfer the remainder of BB and its successor edges to sinkMBB.
7342 sinkMBB->splice(sinkMBB->begin(), BB,
7343 std::next(MachineBasicBlock::iterator(MI)), BB->end());
7344 sinkMBB->transferSuccessorsAndUpdatePHIs(BB);
7346 // Next, add the true and fallthrough blocks as its successors.
7347 BB->addSuccessor(copy0MBB);
7348 BB->addSuccessor(sinkMBB);
7350 if (MI->getOpcode() == PPC::SELECT_I4 ||
7351 MI->getOpcode() == PPC::SELECT_I8 ||
7352 MI->getOpcode() == PPC::SELECT_F4 ||
7353 MI->getOpcode() == PPC::SELECT_F8 ||
7354 MI->getOpcode() == PPC::SELECT_VRRC ||
7355 MI->getOpcode() == PPC::SELECT_VSFRC ||
7356 MI->getOpcode() == PPC::SELECT_VSRC) {
7357 BuildMI(BB, dl, TII->get(PPC::BC))
7358 .addReg(MI->getOperand(1).getReg()).addMBB(sinkMBB);
7360 unsigned SelectPred = MI->getOperand(4).getImm();
7361 BuildMI(BB, dl, TII->get(PPC::BCC))
7362 .addImm(SelectPred).addReg(MI->getOperand(1).getReg()).addMBB(sinkMBB);
7366 // %FalseValue = ...
7367 // # fallthrough to sinkMBB
7370 // Update machine-CFG edges
7371 BB->addSuccessor(sinkMBB);
7374 // %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
7377 BuildMI(*BB, BB->begin(), dl,
7378 TII->get(PPC::PHI), MI->getOperand(0).getReg())
7379 .addReg(MI->getOperand(3).getReg()).addMBB(copy0MBB)
7380 .addReg(MI->getOperand(2).getReg()).addMBB(thisMBB);
7381 } else if (MI->getOpcode() == PPC::ReadTB) {
7382 // To read the 64-bit time-base register on a 32-bit target, we read the
7383 // two halves. Should the counter have wrapped while it was being read, we
7384 // need to try again.
7387 // mfspr Rx,TBU # load from TBU
7388 // mfspr Ry,TB # load from TB
7389 // mfspr Rz,TBU # load from TBU
7390 // cmpw crX,Rx,Rz # check if ‘old’=’new’
7391 // bne readLoop # branch if they're not equal
7394 MachineBasicBlock *readMBB = F->CreateMachineBasicBlock(LLVM_BB);
7395 MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);
7396 DebugLoc dl = MI->getDebugLoc();
7397 F->insert(It, readMBB);
7398 F->insert(It, sinkMBB);
7400 // Transfer the remainder of BB and its successor edges to sinkMBB.
7401 sinkMBB->splice(sinkMBB->begin(), BB,
7402 std::next(MachineBasicBlock::iterator(MI)), BB->end());
7403 sinkMBB->transferSuccessorsAndUpdatePHIs(BB);
7405 BB->addSuccessor(readMBB);
7408 MachineRegisterInfo &RegInfo = F->getRegInfo();
7409 unsigned ReadAgainReg = RegInfo.createVirtualRegister(&PPC::GPRCRegClass);
7410 unsigned LoReg = MI->getOperand(0).getReg();
7411 unsigned HiReg = MI->getOperand(1).getReg();
7413 BuildMI(BB, dl, TII->get(PPC::MFSPR), HiReg).addImm(269);
7414 BuildMI(BB, dl, TII->get(PPC::MFSPR), LoReg).addImm(268);
7415 BuildMI(BB, dl, TII->get(PPC::MFSPR), ReadAgainReg).addImm(269);
7417 unsigned CmpReg = RegInfo.createVirtualRegister(&PPC::CRRCRegClass);
7419 BuildMI(BB, dl, TII->get(PPC::CMPW), CmpReg)
7420 .addReg(HiReg).addReg(ReadAgainReg);
7421 BuildMI(BB, dl, TII->get(PPC::BCC))
7422 .addImm(PPC::PRED_NE).addReg(CmpReg).addMBB(readMBB);
7424 BB->addSuccessor(readMBB);
7425 BB->addSuccessor(sinkMBB);
7427 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_ADD_I8)
7428 BB = EmitPartwordAtomicBinary(MI, BB, true, PPC::ADD4);
7429 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_ADD_I16)
7430 BB = EmitPartwordAtomicBinary(MI, BB, false, PPC::ADD4);
7431 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_ADD_I32)
7432 BB = EmitAtomicBinary(MI, BB, false, PPC::ADD4);
7433 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_ADD_I64)
7434 BB = EmitAtomicBinary(MI, BB, true, PPC::ADD8);
7436 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_AND_I8)
7437 BB = EmitPartwordAtomicBinary(MI, BB, true, PPC::AND);
7438 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_AND_I16)
7439 BB = EmitPartwordAtomicBinary(MI, BB, false, PPC::AND);
7440 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_AND_I32)
7441 BB = EmitAtomicBinary(MI, BB, false, PPC::AND);
7442 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_AND_I64)
7443 BB = EmitAtomicBinary(MI, BB, true, PPC::AND8);
7445 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_OR_I8)
7446 BB = EmitPartwordAtomicBinary(MI, BB, true, PPC::OR);
7447 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_OR_I16)
7448 BB = EmitPartwordAtomicBinary(MI, BB, false, PPC::OR);
7449 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_OR_I32)
7450 BB = EmitAtomicBinary(MI, BB, false, PPC::OR);
7451 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_OR_I64)
7452 BB = EmitAtomicBinary(MI, BB, true, PPC::OR8);
7454 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_XOR_I8)
7455 BB = EmitPartwordAtomicBinary(MI, BB, true, PPC::XOR);
7456 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_XOR_I16)
7457 BB = EmitPartwordAtomicBinary(MI, BB, false, PPC::XOR);
7458 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_XOR_I32)
7459 BB = EmitAtomicBinary(MI, BB, false, PPC::XOR);
7460 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_XOR_I64)
7461 BB = EmitAtomicBinary(MI, BB, true, PPC::XOR8);
7463 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_NAND_I8)
7464 BB = EmitPartwordAtomicBinary(MI, BB, true, PPC::NAND);
7465 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_NAND_I16)
7466 BB = EmitPartwordAtomicBinary(MI, BB, false, PPC::NAND);
7467 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_NAND_I32)
7468 BB = EmitAtomicBinary(MI, BB, false, PPC::NAND);
7469 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_NAND_I64)
7470 BB = EmitAtomicBinary(MI, BB, true, PPC::NAND8);
7472 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_SUB_I8)
7473 BB = EmitPartwordAtomicBinary(MI, BB, true, PPC::SUBF);
7474 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_SUB_I16)
7475 BB = EmitPartwordAtomicBinary(MI, BB, false, PPC::SUBF);
7476 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_SUB_I32)
7477 BB = EmitAtomicBinary(MI, BB, false, PPC::SUBF);
7478 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_SUB_I64)
7479 BB = EmitAtomicBinary(MI, BB, true, PPC::SUBF8);
7481 else if (MI->getOpcode() == PPC::ATOMIC_SWAP_I8)
7482 BB = EmitPartwordAtomicBinary(MI, BB, true, 0);
7483 else if (MI->getOpcode() == PPC::ATOMIC_SWAP_I16)
7484 BB = EmitPartwordAtomicBinary(MI, BB, false, 0);
7485 else if (MI->getOpcode() == PPC::ATOMIC_SWAP_I32)
7486 BB = EmitAtomicBinary(MI, BB, false, 0);
7487 else if (MI->getOpcode() == PPC::ATOMIC_SWAP_I64)
7488 BB = EmitAtomicBinary(MI, BB, true, 0);
7490 else if (MI->getOpcode() == PPC::ATOMIC_CMP_SWAP_I32 ||
7491 MI->getOpcode() == PPC::ATOMIC_CMP_SWAP_I64) {
7492 bool is64bit = MI->getOpcode() == PPC::ATOMIC_CMP_SWAP_I64;
7494 unsigned dest = MI->getOperand(0).getReg();
7495 unsigned ptrA = MI->getOperand(1).getReg();
7496 unsigned ptrB = MI->getOperand(2).getReg();
7497 unsigned oldval = MI->getOperand(3).getReg();
7498 unsigned newval = MI->getOperand(4).getReg();
7499 DebugLoc dl = MI->getDebugLoc();
7501 MachineBasicBlock *loop1MBB = F->CreateMachineBasicBlock(LLVM_BB);
7502 MachineBasicBlock *loop2MBB = F->CreateMachineBasicBlock(LLVM_BB);
7503 MachineBasicBlock *midMBB = F->CreateMachineBasicBlock(LLVM_BB);
7504 MachineBasicBlock *exitMBB = F->CreateMachineBasicBlock(LLVM_BB);
7505 F->insert(It, loop1MBB);
7506 F->insert(It, loop2MBB);
7507 F->insert(It, midMBB);
7508 F->insert(It, exitMBB);
7509 exitMBB->splice(exitMBB->begin(), BB,
7510 std::next(MachineBasicBlock::iterator(MI)), BB->end());
7511 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
7515 // fallthrough --> loopMBB
7516 BB->addSuccessor(loop1MBB);
7519 // l[wd]arx dest, ptr
7520 // cmp[wd] dest, oldval
7523 // st[wd]cx. newval, ptr
7527 // st[wd]cx. dest, ptr
7530 BuildMI(BB, dl, TII->get(is64bit ? PPC::LDARX : PPC::LWARX), dest)
7531 .addReg(ptrA).addReg(ptrB);
7532 BuildMI(BB, dl, TII->get(is64bit ? PPC::CMPD : PPC::CMPW), PPC::CR0)
7533 .addReg(oldval).addReg(dest);
7534 BuildMI(BB, dl, TII->get(PPC::BCC))
7535 .addImm(PPC::PRED_NE).addReg(PPC::CR0).addMBB(midMBB);
7536 BB->addSuccessor(loop2MBB);
7537 BB->addSuccessor(midMBB);
7540 BuildMI(BB, dl, TII->get(is64bit ? PPC::STDCX : PPC::STWCX))
7541 .addReg(newval).addReg(ptrA).addReg(ptrB);
7542 BuildMI(BB, dl, TII->get(PPC::BCC))
7543 .addImm(PPC::PRED_NE).addReg(PPC::CR0).addMBB(loop1MBB);
7544 BuildMI(BB, dl, TII->get(PPC::B)).addMBB(exitMBB);
7545 BB->addSuccessor(loop1MBB);
7546 BB->addSuccessor(exitMBB);
7549 BuildMI(BB, dl, TII->get(is64bit ? PPC::STDCX : PPC::STWCX))
7550 .addReg(dest).addReg(ptrA).addReg(ptrB);
7551 BB->addSuccessor(exitMBB);
7556 } else if (MI->getOpcode() == PPC::ATOMIC_CMP_SWAP_I8 ||
7557 MI->getOpcode() == PPC::ATOMIC_CMP_SWAP_I16) {
7558 // We must use 64-bit registers for addresses when targeting 64-bit,
7559 // since we're actually doing arithmetic on them. Other registers
7561 bool is64bit = Subtarget.isPPC64();
7562 bool is8bit = MI->getOpcode() == PPC::ATOMIC_CMP_SWAP_I8;
7564 unsigned dest = MI->getOperand(0).getReg();
7565 unsigned ptrA = MI->getOperand(1).getReg();
7566 unsigned ptrB = MI->getOperand(2).getReg();
7567 unsigned oldval = MI->getOperand(3).getReg();
7568 unsigned newval = MI->getOperand(4).getReg();
7569 DebugLoc dl = MI->getDebugLoc();
7571 MachineBasicBlock *loop1MBB = F->CreateMachineBasicBlock(LLVM_BB);
7572 MachineBasicBlock *loop2MBB = F->CreateMachineBasicBlock(LLVM_BB);
7573 MachineBasicBlock *midMBB = F->CreateMachineBasicBlock(LLVM_BB);
7574 MachineBasicBlock *exitMBB = F->CreateMachineBasicBlock(LLVM_BB);
7575 F->insert(It, loop1MBB);
7576 F->insert(It, loop2MBB);
7577 F->insert(It, midMBB);
7578 F->insert(It, exitMBB);
7579 exitMBB->splice(exitMBB->begin(), BB,
7580 std::next(MachineBasicBlock::iterator(MI)), BB->end());
7581 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
7583 MachineRegisterInfo &RegInfo = F->getRegInfo();
7584 const TargetRegisterClass *RC = is64bit ? &PPC::G8RCRegClass
7585 : &PPC::GPRCRegClass;
7586 unsigned PtrReg = RegInfo.createVirtualRegister(RC);
7587 unsigned Shift1Reg = RegInfo.createVirtualRegister(RC);
7588 unsigned ShiftReg = RegInfo.createVirtualRegister(RC);
7589 unsigned NewVal2Reg = RegInfo.createVirtualRegister(RC);
7590 unsigned NewVal3Reg = RegInfo.createVirtualRegister(RC);
7591 unsigned OldVal2Reg = RegInfo.createVirtualRegister(RC);
7592 unsigned OldVal3Reg = RegInfo.createVirtualRegister(RC);
7593 unsigned MaskReg = RegInfo.createVirtualRegister(RC);
7594 unsigned Mask2Reg = RegInfo.createVirtualRegister(RC);
7595 unsigned Mask3Reg = RegInfo.createVirtualRegister(RC);
7596 unsigned Tmp2Reg = RegInfo.createVirtualRegister(RC);
7597 unsigned Tmp4Reg = RegInfo.createVirtualRegister(RC);
7598 unsigned TmpDestReg = RegInfo.createVirtualRegister(RC);
7600 unsigned TmpReg = RegInfo.createVirtualRegister(RC);
7601 unsigned ZeroReg = is64bit ? PPC::ZERO8 : PPC::ZERO;
7604 // fallthrough --> loopMBB
7605 BB->addSuccessor(loop1MBB);
7607 // The 4-byte load must be aligned, while a char or short may be
7608 // anywhere in the word. Hence all this nasty bookkeeping code.
7609 // add ptr1, ptrA, ptrB [copy if ptrA==0]
7610 // rlwinm shift1, ptr1, 3, 27, 28 [3, 27, 27]
7611 // xori shift, shift1, 24 [16]
7612 // rlwinm ptr, ptr1, 0, 0, 29
7613 // slw newval2, newval, shift
7614 // slw oldval2, oldval,shift
7615 // li mask2, 255 [li mask3, 0; ori mask2, mask3, 65535]
7616 // slw mask, mask2, shift
7617 // and newval3, newval2, mask
7618 // and oldval3, oldval2, mask
7620 // lwarx tmpDest, ptr
7621 // and tmp, tmpDest, mask
7622 // cmpw tmp, oldval3
7625 // andc tmp2, tmpDest, mask
7626 // or tmp4, tmp2, newval3
7631 // stwcx. tmpDest, ptr
7633 // srw dest, tmpDest, shift
7634 if (ptrA != ZeroReg) {
7635 Ptr1Reg = RegInfo.createVirtualRegister(RC);
7636 BuildMI(BB, dl, TII->get(is64bit ? PPC::ADD8 : PPC::ADD4), Ptr1Reg)
7637 .addReg(ptrA).addReg(ptrB);
7641 BuildMI(BB, dl, TII->get(PPC::RLWINM), Shift1Reg).addReg(Ptr1Reg)
7642 .addImm(3).addImm(27).addImm(is8bit ? 28 : 27);
7643 BuildMI(BB, dl, TII->get(is64bit ? PPC::XORI8 : PPC::XORI), ShiftReg)
7644 .addReg(Shift1Reg).addImm(is8bit ? 24 : 16);
7646 BuildMI(BB, dl, TII->get(PPC::RLDICR), PtrReg)
7647 .addReg(Ptr1Reg).addImm(0).addImm(61);
7649 BuildMI(BB, dl, TII->get(PPC::RLWINM), PtrReg)
7650 .addReg(Ptr1Reg).addImm(0).addImm(0).addImm(29);
7651 BuildMI(BB, dl, TII->get(PPC::SLW), NewVal2Reg)
7652 .addReg(newval).addReg(ShiftReg);
7653 BuildMI(BB, dl, TII->get(PPC::SLW), OldVal2Reg)
7654 .addReg(oldval).addReg(ShiftReg);
7656 BuildMI(BB, dl, TII->get(PPC::LI), Mask2Reg).addImm(255);
7658 BuildMI(BB, dl, TII->get(PPC::LI), Mask3Reg).addImm(0);
7659 BuildMI(BB, dl, TII->get(PPC::ORI), Mask2Reg)
7660 .addReg(Mask3Reg).addImm(65535);
7662 BuildMI(BB, dl, TII->get(PPC::SLW), MaskReg)
7663 .addReg(Mask2Reg).addReg(ShiftReg);
7664 BuildMI(BB, dl, TII->get(PPC::AND), NewVal3Reg)
7665 .addReg(NewVal2Reg).addReg(MaskReg);
7666 BuildMI(BB, dl, TII->get(PPC::AND), OldVal3Reg)
7667 .addReg(OldVal2Reg).addReg(MaskReg);
7670 BuildMI(BB, dl, TII->get(PPC::LWARX), TmpDestReg)
7671 .addReg(ZeroReg).addReg(PtrReg);
7672 BuildMI(BB, dl, TII->get(PPC::AND),TmpReg)
7673 .addReg(TmpDestReg).addReg(MaskReg);
7674 BuildMI(BB, dl, TII->get(PPC::CMPW), PPC::CR0)
7675 .addReg(TmpReg).addReg(OldVal3Reg);
7676 BuildMI(BB, dl, TII->get(PPC::BCC))
7677 .addImm(PPC::PRED_NE).addReg(PPC::CR0).addMBB(midMBB);
7678 BB->addSuccessor(loop2MBB);
7679 BB->addSuccessor(midMBB);
7682 BuildMI(BB, dl, TII->get(PPC::ANDC),Tmp2Reg)
7683 .addReg(TmpDestReg).addReg(MaskReg);
7684 BuildMI(BB, dl, TII->get(PPC::OR),Tmp4Reg)
7685 .addReg(Tmp2Reg).addReg(NewVal3Reg);
7686 BuildMI(BB, dl, TII->get(PPC::STWCX)).addReg(Tmp4Reg)
7687 .addReg(ZeroReg).addReg(PtrReg);
7688 BuildMI(BB, dl, TII->get(PPC::BCC))
7689 .addImm(PPC::PRED_NE).addReg(PPC::CR0).addMBB(loop1MBB);
7690 BuildMI(BB, dl, TII->get(PPC::B)).addMBB(exitMBB);
7691 BB->addSuccessor(loop1MBB);
7692 BB->addSuccessor(exitMBB);
7695 BuildMI(BB, dl, TII->get(PPC::STWCX)).addReg(TmpDestReg)
7696 .addReg(ZeroReg).addReg(PtrReg);
7697 BB->addSuccessor(exitMBB);
7702 BuildMI(*BB, BB->begin(), dl, TII->get(PPC::SRW),dest).addReg(TmpReg)
7704 } else if (MI->getOpcode() == PPC::FADDrtz) {
7705 // This pseudo performs an FADD with rounding mode temporarily forced
7706 // to round-to-zero. We emit this via custom inserter since the FPSCR
7707 // is not modeled at the SelectionDAG level.
7708 unsigned Dest = MI->getOperand(0).getReg();
7709 unsigned Src1 = MI->getOperand(1).getReg();
7710 unsigned Src2 = MI->getOperand(2).getReg();
7711 DebugLoc dl = MI->getDebugLoc();
7713 MachineRegisterInfo &RegInfo = F->getRegInfo();
7714 unsigned MFFSReg = RegInfo.createVirtualRegister(&PPC::F8RCRegClass);
7716 // Save FPSCR value.
7717 BuildMI(*BB, MI, dl, TII->get(PPC::MFFS), MFFSReg);
7719 // Set rounding mode to round-to-zero.
7720 BuildMI(*BB, MI, dl, TII->get(PPC::MTFSB1)).addImm(31);
7721 BuildMI(*BB, MI, dl, TII->get(PPC::MTFSB0)).addImm(30);
7723 // Perform addition.
7724 BuildMI(*BB, MI, dl, TII->get(PPC::FADD), Dest).addReg(Src1).addReg(Src2);
7726 // Restore FPSCR value.
7727 BuildMI(*BB, MI, dl, TII->get(PPC::MTFSF)).addImm(1).addReg(MFFSReg);
7728 } else if (MI->getOpcode() == PPC::ANDIo_1_EQ_BIT ||
7729 MI->getOpcode() == PPC::ANDIo_1_GT_BIT ||
7730 MI->getOpcode() == PPC::ANDIo_1_EQ_BIT8 ||
7731 MI->getOpcode() == PPC::ANDIo_1_GT_BIT8) {
7732 unsigned Opcode = (MI->getOpcode() == PPC::ANDIo_1_EQ_BIT8 ||
7733 MI->getOpcode() == PPC::ANDIo_1_GT_BIT8) ?
7734 PPC::ANDIo8 : PPC::ANDIo;
7735 bool isEQ = (MI->getOpcode() == PPC::ANDIo_1_EQ_BIT ||
7736 MI->getOpcode() == PPC::ANDIo_1_EQ_BIT8);
7738 MachineRegisterInfo &RegInfo = F->getRegInfo();
7739 unsigned Dest = RegInfo.createVirtualRegister(Opcode == PPC::ANDIo ?
7740 &PPC::GPRCRegClass :
7741 &PPC::G8RCRegClass);
7743 DebugLoc dl = MI->getDebugLoc();
7744 BuildMI(*BB, MI, dl, TII->get(Opcode), Dest)
7745 .addReg(MI->getOperand(1).getReg()).addImm(1);
7746 BuildMI(*BB, MI, dl, TII->get(TargetOpcode::COPY),
7747 MI->getOperand(0).getReg())
7748 .addReg(isEQ ? PPC::CR0EQ : PPC::CR0GT);
7750 llvm_unreachable("Unexpected instr type to insert");
7753 MI->eraseFromParent(); // The pseudo instruction is gone now.
7757 //===----------------------------------------------------------------------===//
7758 // Target Optimization Hooks
7759 //===----------------------------------------------------------------------===//
7761 SDValue PPCTargetLowering::getRsqrtEstimate(SDValue Operand,
7762 DAGCombinerInfo &DCI,
7763 unsigned &RefinementSteps,
7764 bool &UseOneConstNR) const {
7765 EVT VT = Operand.getValueType();
7766 if ((VT == MVT::f32 && Subtarget.hasFRSQRTES()) ||
7767 (VT == MVT::f64 && Subtarget.hasFRSQRTE()) ||
7768 (VT == MVT::v4f32 && Subtarget.hasAltivec()) ||
7769 (VT == MVT::v2f64 && Subtarget.hasVSX())) {
7770 // Convergence is quadratic, so we essentially double the number of digits
7771 // correct after every iteration. For both FRE and FRSQRTE, the minimum
7772 // architected relative accuracy is 2^-5. When hasRecipPrec(), this is
7773 // 2^-14. IEEE float has 23 digits and double has 52 digits.
7774 RefinementSteps = Subtarget.hasRecipPrec() ? 1 : 3;
7775 if (VT.getScalarType() == MVT::f64)
7777 UseOneConstNR = true;
7778 return DCI.DAG.getNode(PPCISD::FRSQRTE, SDLoc(Operand), VT, Operand);
7783 SDValue PPCTargetLowering::getRecipEstimate(SDValue Operand,
7784 DAGCombinerInfo &DCI,
7785 unsigned &RefinementSteps) const {
7786 EVT VT = Operand.getValueType();
7787 if ((VT == MVT::f32 && Subtarget.hasFRES()) ||
7788 (VT == MVT::f64 && Subtarget.hasFRE()) ||
7789 (VT == MVT::v4f32 && Subtarget.hasAltivec()) ||
7790 (VT == MVT::v2f64 && Subtarget.hasVSX())) {
7791 // Convergence is quadratic, so we essentially double the number of digits
7792 // correct after every iteration. For both FRE and FRSQRTE, the minimum
7793 // architected relative accuracy is 2^-5. When hasRecipPrec(), this is
7794 // 2^-14. IEEE float has 23 digits and double has 52 digits.
7795 RefinementSteps = Subtarget.hasRecipPrec() ? 1 : 3;
7796 if (VT.getScalarType() == MVT::f64)
7798 return DCI.DAG.getNode(PPCISD::FRE, SDLoc(Operand), VT, Operand);
7803 bool PPCTargetLowering::combineRepeatedFPDivisors(unsigned NumUsers) const {
7804 // Note: This functionality is used only when unsafe-fp-math is enabled, and
7805 // on cores with reciprocal estimates (which are used when unsafe-fp-math is
7806 // enabled for division), this functionality is redundant with the default
7807 // combiner logic (once the division -> reciprocal/multiply transformation
7808 // has taken place). As a result, this matters more for older cores than for
7811 // Combine multiple FDIVs with the same divisor into multiple FMULs by the
7812 // reciprocal if there are two or more FDIVs (for embedded cores with only
7813 // one FP pipeline) for three or more FDIVs (for generic OOO cores).
7814 switch (Subtarget.getDarwinDirective()) {
7816 return NumUsers > 2;
7819 case PPC::DIR_E500mc:
7820 case PPC::DIR_E5500:
7821 return NumUsers > 1;
7825 static bool isConsecutiveLSLoc(SDValue Loc, EVT VT, LSBaseSDNode *Base,
7826 unsigned Bytes, int Dist,
7827 SelectionDAG &DAG) {
7828 if (VT.getSizeInBits() / 8 != Bytes)
7831 SDValue BaseLoc = Base->getBasePtr();
7832 if (Loc.getOpcode() == ISD::FrameIndex) {
7833 if (BaseLoc.getOpcode() != ISD::FrameIndex)
7835 const MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
7836 int FI = cast<FrameIndexSDNode>(Loc)->getIndex();
7837 int BFI = cast<FrameIndexSDNode>(BaseLoc)->getIndex();
7838 int FS = MFI->getObjectSize(FI);
7839 int BFS = MFI->getObjectSize(BFI);
7840 if (FS != BFS || FS != (int)Bytes) return false;
7841 return MFI->getObjectOffset(FI) == (MFI->getObjectOffset(BFI) + Dist*Bytes);
7845 if (DAG.isBaseWithConstantOffset(Loc) && Loc.getOperand(0) == BaseLoc &&
7846 cast<ConstantSDNode>(Loc.getOperand(1))->getSExtValue() == Dist*Bytes)
7849 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
7850 const GlobalValue *GV1 = nullptr;
7851 const GlobalValue *GV2 = nullptr;
7852 int64_t Offset1 = 0;
7853 int64_t Offset2 = 0;
7854 bool isGA1 = TLI.isGAPlusOffset(Loc.getNode(), GV1, Offset1);
7855 bool isGA2 = TLI.isGAPlusOffset(BaseLoc.getNode(), GV2, Offset2);
7856 if (isGA1 && isGA2 && GV1 == GV2)
7857 return Offset1 == (Offset2 + Dist*Bytes);
7861 // Like SelectionDAG::isConsecutiveLoad, but also works for stores, and does
7862 // not enforce equality of the chain operands.
7863 static bool isConsecutiveLS(SDNode *N, LSBaseSDNode *Base,
7864 unsigned Bytes, int Dist,
7865 SelectionDAG &DAG) {
7866 if (LSBaseSDNode *LS = dyn_cast<LSBaseSDNode>(N)) {
7867 EVT VT = LS->getMemoryVT();
7868 SDValue Loc = LS->getBasePtr();
7869 return isConsecutiveLSLoc(Loc, VT, Base, Bytes, Dist, DAG);
7872 if (N->getOpcode() == ISD::INTRINSIC_W_CHAIN) {
7874 switch (cast<ConstantSDNode>(N->getOperand(1))->getZExtValue()) {
7875 default: return false;
7876 case Intrinsic::ppc_altivec_lvx:
7877 case Intrinsic::ppc_altivec_lvxl:
7878 case Intrinsic::ppc_vsx_lxvw4x:
7881 case Intrinsic::ppc_vsx_lxvd2x:
7884 case Intrinsic::ppc_altivec_lvebx:
7887 case Intrinsic::ppc_altivec_lvehx:
7890 case Intrinsic::ppc_altivec_lvewx:
7895 return isConsecutiveLSLoc(N->getOperand(2), VT, Base, Bytes, Dist, DAG);
7898 if (N->getOpcode() == ISD::INTRINSIC_VOID) {
7900 switch (cast<ConstantSDNode>(N->getOperand(1))->getZExtValue()) {
7901 default: return false;
7902 case Intrinsic::ppc_altivec_stvx:
7903 case Intrinsic::ppc_altivec_stvxl:
7904 case Intrinsic::ppc_vsx_stxvw4x:
7907 case Intrinsic::ppc_vsx_stxvd2x:
7910 case Intrinsic::ppc_altivec_stvebx:
7913 case Intrinsic::ppc_altivec_stvehx:
7916 case Intrinsic::ppc_altivec_stvewx:
7921 return isConsecutiveLSLoc(N->getOperand(3), VT, Base, Bytes, Dist, DAG);
7927 // Return true is there is a nearyby consecutive load to the one provided
7928 // (regardless of alignment). We search up and down the chain, looking though
7929 // token factors and other loads (but nothing else). As a result, a true result
7930 // indicates that it is safe to create a new consecutive load adjacent to the
7932 static bool findConsecutiveLoad(LoadSDNode *LD, SelectionDAG &DAG) {
7933 SDValue Chain = LD->getChain();
7934 EVT VT = LD->getMemoryVT();
7936 SmallSet<SDNode *, 16> LoadRoots;
7937 SmallVector<SDNode *, 8> Queue(1, Chain.getNode());
7938 SmallSet<SDNode *, 16> Visited;
7940 // First, search up the chain, branching to follow all token-factor operands.
7941 // If we find a consecutive load, then we're done, otherwise, record all
7942 // nodes just above the top-level loads and token factors.
7943 while (!Queue.empty()) {
7944 SDNode *ChainNext = Queue.pop_back_val();
7945 if (!Visited.insert(ChainNext).second)
7948 if (MemSDNode *ChainLD = dyn_cast<MemSDNode>(ChainNext)) {
7949 if (isConsecutiveLS(ChainLD, LD, VT.getStoreSize(), 1, DAG))
7952 if (!Visited.count(ChainLD->getChain().getNode()))
7953 Queue.push_back(ChainLD->getChain().getNode());
7954 } else if (ChainNext->getOpcode() == ISD::TokenFactor) {
7955 for (const SDUse &O : ChainNext->ops())
7956 if (!Visited.count(O.getNode()))
7957 Queue.push_back(O.getNode());
7959 LoadRoots.insert(ChainNext);
7962 // Second, search down the chain, starting from the top-level nodes recorded
7963 // in the first phase. These top-level nodes are the nodes just above all
7964 // loads and token factors. Starting with their uses, recursively look though
7965 // all loads (just the chain uses) and token factors to find a consecutive
7970 for (SmallSet<SDNode *, 16>::iterator I = LoadRoots.begin(),
7971 IE = LoadRoots.end(); I != IE; ++I) {
7972 Queue.push_back(*I);
7974 while (!Queue.empty()) {
7975 SDNode *LoadRoot = Queue.pop_back_val();
7976 if (!Visited.insert(LoadRoot).second)
7979 if (MemSDNode *ChainLD = dyn_cast<MemSDNode>(LoadRoot))
7980 if (isConsecutiveLS(ChainLD, LD, VT.getStoreSize(), 1, DAG))
7983 for (SDNode::use_iterator UI = LoadRoot->use_begin(),
7984 UE = LoadRoot->use_end(); UI != UE; ++UI)
7985 if (((isa<MemSDNode>(*UI) &&
7986 cast<MemSDNode>(*UI)->getChain().getNode() == LoadRoot) ||
7987 UI->getOpcode() == ISD::TokenFactor) && !Visited.count(*UI))
7988 Queue.push_back(*UI);
7995 SDValue PPCTargetLowering::DAGCombineTruncBoolExt(SDNode *N,
7996 DAGCombinerInfo &DCI) const {
7997 SelectionDAG &DAG = DCI.DAG;
8000 assert(Subtarget.useCRBits() &&
8001 "Expecting to be tracking CR bits");
8002 // If we're tracking CR bits, we need to be careful that we don't have:
8003 // trunc(binary-ops(zext(x), zext(y)))
8005 // trunc(binary-ops(binary-ops(zext(x), zext(y)), ...)
8006 // such that we're unnecessarily moving things into GPRs when it would be
8007 // better to keep them in CR bits.
8009 // Note that trunc here can be an actual i1 trunc, or can be the effective
8010 // truncation that comes from a setcc or select_cc.
8011 if (N->getOpcode() == ISD::TRUNCATE &&
8012 N->getValueType(0) != MVT::i1)
8015 if (N->getOperand(0).getValueType() != MVT::i32 &&
8016 N->getOperand(0).getValueType() != MVT::i64)
8019 if (N->getOpcode() == ISD::SETCC ||
8020 N->getOpcode() == ISD::SELECT_CC) {
8021 // If we're looking at a comparison, then we need to make sure that the
8022 // high bits (all except for the first) don't matter the result.
8024 cast<CondCodeSDNode>(N->getOperand(
8025 N->getOpcode() == ISD::SETCC ? 2 : 4))->get();
8026 unsigned OpBits = N->getOperand(0).getValueSizeInBits();
8028 if (ISD::isSignedIntSetCC(CC)) {
8029 if (DAG.ComputeNumSignBits(N->getOperand(0)) != OpBits ||
8030 DAG.ComputeNumSignBits(N->getOperand(1)) != OpBits)
8032 } else if (ISD::isUnsignedIntSetCC(CC)) {
8033 if (!DAG.MaskedValueIsZero(N->getOperand(0),
8034 APInt::getHighBitsSet(OpBits, OpBits-1)) ||
8035 !DAG.MaskedValueIsZero(N->getOperand(1),
8036 APInt::getHighBitsSet(OpBits, OpBits-1)))
8039 // This is neither a signed nor an unsigned comparison, just make sure
8040 // that the high bits are equal.
8041 APInt Op1Zero, Op1One;
8042 APInt Op2Zero, Op2One;
8043 DAG.computeKnownBits(N->getOperand(0), Op1Zero, Op1One);
8044 DAG.computeKnownBits(N->getOperand(1), Op2Zero, Op2One);
8046 // We don't really care about what is known about the first bit (if
8047 // anything), so clear it in all masks prior to comparing them.
8048 Op1Zero.clearBit(0); Op1One.clearBit(0);
8049 Op2Zero.clearBit(0); Op2One.clearBit(0);
8051 if (Op1Zero != Op2Zero || Op1One != Op2One)
8056 // We now know that the higher-order bits are irrelevant, we just need to
8057 // make sure that all of the intermediate operations are bit operations, and
8058 // all inputs are extensions.
8059 if (N->getOperand(0).getOpcode() != ISD::AND &&
8060 N->getOperand(0).getOpcode() != ISD::OR &&
8061 N->getOperand(0).getOpcode() != ISD::XOR &&
8062 N->getOperand(0).getOpcode() != ISD::SELECT &&
8063 N->getOperand(0).getOpcode() != ISD::SELECT_CC &&
8064 N->getOperand(0).getOpcode() != ISD::TRUNCATE &&
8065 N->getOperand(0).getOpcode() != ISD::SIGN_EXTEND &&
8066 N->getOperand(0).getOpcode() != ISD::ZERO_EXTEND &&
8067 N->getOperand(0).getOpcode() != ISD::ANY_EXTEND)
8070 if ((N->getOpcode() == ISD::SETCC || N->getOpcode() == ISD::SELECT_CC) &&
8071 N->getOperand(1).getOpcode() != ISD::AND &&
8072 N->getOperand(1).getOpcode() != ISD::OR &&
8073 N->getOperand(1).getOpcode() != ISD::XOR &&
8074 N->getOperand(1).getOpcode() != ISD::SELECT &&
8075 N->getOperand(1).getOpcode() != ISD::SELECT_CC &&
8076 N->getOperand(1).getOpcode() != ISD::TRUNCATE &&
8077 N->getOperand(1).getOpcode() != ISD::SIGN_EXTEND &&
8078 N->getOperand(1).getOpcode() != ISD::ZERO_EXTEND &&
8079 N->getOperand(1).getOpcode() != ISD::ANY_EXTEND)
8082 SmallVector<SDValue, 4> Inputs;
8083 SmallVector<SDValue, 8> BinOps, PromOps;
8084 SmallPtrSet<SDNode *, 16> Visited;
8086 for (unsigned i = 0; i < 2; ++i) {
8087 if (((N->getOperand(i).getOpcode() == ISD::SIGN_EXTEND ||
8088 N->getOperand(i).getOpcode() == ISD::ZERO_EXTEND ||
8089 N->getOperand(i).getOpcode() == ISD::ANY_EXTEND) &&
8090 N->getOperand(i).getOperand(0).getValueType() == MVT::i1) ||
8091 isa<ConstantSDNode>(N->getOperand(i)))
8092 Inputs.push_back(N->getOperand(i));
8094 BinOps.push_back(N->getOperand(i));
8096 if (N->getOpcode() == ISD::TRUNCATE)
8100 // Visit all inputs, collect all binary operations (and, or, xor and
8101 // select) that are all fed by extensions.
8102 while (!BinOps.empty()) {
8103 SDValue BinOp = BinOps.back();
8106 if (!Visited.insert(BinOp.getNode()).second)
8109 PromOps.push_back(BinOp);
8111 for (unsigned i = 0, ie = BinOp.getNumOperands(); i != ie; ++i) {
8112 // The condition of the select is not promoted.
8113 if (BinOp.getOpcode() == ISD::SELECT && i == 0)
8115 if (BinOp.getOpcode() == ISD::SELECT_CC && i != 2 && i != 3)
8118 if (((BinOp.getOperand(i).getOpcode() == ISD::SIGN_EXTEND ||
8119 BinOp.getOperand(i).getOpcode() == ISD::ZERO_EXTEND ||
8120 BinOp.getOperand(i).getOpcode() == ISD::ANY_EXTEND) &&
8121 BinOp.getOperand(i).getOperand(0).getValueType() == MVT::i1) ||
8122 isa<ConstantSDNode>(BinOp.getOperand(i))) {
8123 Inputs.push_back(BinOp.getOperand(i));
8124 } else if (BinOp.getOperand(i).getOpcode() == ISD::AND ||
8125 BinOp.getOperand(i).getOpcode() == ISD::OR ||
8126 BinOp.getOperand(i).getOpcode() == ISD::XOR ||
8127 BinOp.getOperand(i).getOpcode() == ISD::SELECT ||
8128 BinOp.getOperand(i).getOpcode() == ISD::SELECT_CC ||
8129 BinOp.getOperand(i).getOpcode() == ISD::TRUNCATE ||
8130 BinOp.getOperand(i).getOpcode() == ISD::SIGN_EXTEND ||
8131 BinOp.getOperand(i).getOpcode() == ISD::ZERO_EXTEND ||
8132 BinOp.getOperand(i).getOpcode() == ISD::ANY_EXTEND) {
8133 BinOps.push_back(BinOp.getOperand(i));
8135 // We have an input that is not an extension or another binary
8136 // operation; we'll abort this transformation.
8142 // Make sure that this is a self-contained cluster of operations (which
8143 // is not quite the same thing as saying that everything has only one
8145 for (unsigned i = 0, ie = Inputs.size(); i != ie; ++i) {
8146 if (isa<ConstantSDNode>(Inputs[i]))
8149 for (SDNode::use_iterator UI = Inputs[i].getNode()->use_begin(),
8150 UE = Inputs[i].getNode()->use_end();
8153 if (User != N && !Visited.count(User))
8156 // Make sure that we're not going to promote the non-output-value
8157 // operand(s) or SELECT or SELECT_CC.
8158 // FIXME: Although we could sometimes handle this, and it does occur in
8159 // practice that one of the condition inputs to the select is also one of
8160 // the outputs, we currently can't deal with this.
8161 if (User->getOpcode() == ISD::SELECT) {
8162 if (User->getOperand(0) == Inputs[i])
8164 } else if (User->getOpcode() == ISD::SELECT_CC) {
8165 if (User->getOperand(0) == Inputs[i] ||
8166 User->getOperand(1) == Inputs[i])
8172 for (unsigned i = 0, ie = PromOps.size(); i != ie; ++i) {
8173 for (SDNode::use_iterator UI = PromOps[i].getNode()->use_begin(),
8174 UE = PromOps[i].getNode()->use_end();
8177 if (User != N && !Visited.count(User))
8180 // Make sure that we're not going to promote the non-output-value
8181 // operand(s) or SELECT or SELECT_CC.
8182 // FIXME: Although we could sometimes handle this, and it does occur in
8183 // practice that one of the condition inputs to the select is also one of
8184 // the outputs, we currently can't deal with this.
8185 if (User->getOpcode() == ISD::SELECT) {
8186 if (User->getOperand(0) == PromOps[i])
8188 } else if (User->getOpcode() == ISD::SELECT_CC) {
8189 if (User->getOperand(0) == PromOps[i] ||
8190 User->getOperand(1) == PromOps[i])
8196 // Replace all inputs with the extension operand.
8197 for (unsigned i = 0, ie = Inputs.size(); i != ie; ++i) {
8198 // Constants may have users outside the cluster of to-be-promoted nodes,
8199 // and so we need to replace those as we do the promotions.
8200 if (isa<ConstantSDNode>(Inputs[i]))
8203 DAG.ReplaceAllUsesOfValueWith(Inputs[i], Inputs[i].getOperand(0));
8206 // Replace all operations (these are all the same, but have a different
8207 // (i1) return type). DAG.getNode will validate that the types of
8208 // a binary operator match, so go through the list in reverse so that
8209 // we've likely promoted both operands first. Any intermediate truncations or
8210 // extensions disappear.
8211 while (!PromOps.empty()) {
8212 SDValue PromOp = PromOps.back();
8215 if (PromOp.getOpcode() == ISD::TRUNCATE ||
8216 PromOp.getOpcode() == ISD::SIGN_EXTEND ||
8217 PromOp.getOpcode() == ISD::ZERO_EXTEND ||
8218 PromOp.getOpcode() == ISD::ANY_EXTEND) {
8219 if (!isa<ConstantSDNode>(PromOp.getOperand(0)) &&
8220 PromOp.getOperand(0).getValueType() != MVT::i1) {
8221 // The operand is not yet ready (see comment below).
8222 PromOps.insert(PromOps.begin(), PromOp);
8226 SDValue RepValue = PromOp.getOperand(0);
8227 if (isa<ConstantSDNode>(RepValue))
8228 RepValue = DAG.getNode(ISD::TRUNCATE, dl, MVT::i1, RepValue);
8230 DAG.ReplaceAllUsesOfValueWith(PromOp, RepValue);
8235 switch (PromOp.getOpcode()) {
8236 default: C = 0; break;
8237 case ISD::SELECT: C = 1; break;
8238 case ISD::SELECT_CC: C = 2; break;
8241 if ((!isa<ConstantSDNode>(PromOp.getOperand(C)) &&
8242 PromOp.getOperand(C).getValueType() != MVT::i1) ||
8243 (!isa<ConstantSDNode>(PromOp.getOperand(C+1)) &&
8244 PromOp.getOperand(C+1).getValueType() != MVT::i1)) {
8245 // The to-be-promoted operands of this node have not yet been
8246 // promoted (this should be rare because we're going through the
8247 // list backward, but if one of the operands has several users in
8248 // this cluster of to-be-promoted nodes, it is possible).
8249 PromOps.insert(PromOps.begin(), PromOp);
8253 SmallVector<SDValue, 3> Ops(PromOp.getNode()->op_begin(),
8254 PromOp.getNode()->op_end());
8256 // If there are any constant inputs, make sure they're replaced now.
8257 for (unsigned i = 0; i < 2; ++i)
8258 if (isa<ConstantSDNode>(Ops[C+i]))
8259 Ops[C+i] = DAG.getNode(ISD::TRUNCATE, dl, MVT::i1, Ops[C+i]);
8261 DAG.ReplaceAllUsesOfValueWith(PromOp,
8262 DAG.getNode(PromOp.getOpcode(), dl, MVT::i1, Ops));
8265 // Now we're left with the initial truncation itself.
8266 if (N->getOpcode() == ISD::TRUNCATE)
8267 return N->getOperand(0);
8269 // Otherwise, this is a comparison. The operands to be compared have just
8270 // changed type (to i1), but everything else is the same.
8271 return SDValue(N, 0);
8274 SDValue PPCTargetLowering::DAGCombineExtBoolTrunc(SDNode *N,
8275 DAGCombinerInfo &DCI) const {
8276 SelectionDAG &DAG = DCI.DAG;
8279 // If we're tracking CR bits, we need to be careful that we don't have:
8280 // zext(binary-ops(trunc(x), trunc(y)))
8282 // zext(binary-ops(binary-ops(trunc(x), trunc(y)), ...)
8283 // such that we're unnecessarily moving things into CR bits that can more
8284 // efficiently stay in GPRs. Note that if we're not certain that the high
8285 // bits are set as required by the final extension, we still may need to do
8286 // some masking to get the proper behavior.
8288 // This same functionality is important on PPC64 when dealing with
8289 // 32-to-64-bit extensions; these occur often when 32-bit values are used as
8290 // the return values of functions. Because it is so similar, it is handled
8293 if (N->getValueType(0) != MVT::i32 &&
8294 N->getValueType(0) != MVT::i64)
8297 if (!((N->getOperand(0).getValueType() == MVT::i1 &&
8298 Subtarget.useCRBits()) ||
8299 (N->getOperand(0).getValueType() == MVT::i32 &&
8300 Subtarget.isPPC64())))
8303 if (N->getOperand(0).getOpcode() != ISD::AND &&
8304 N->getOperand(0).getOpcode() != ISD::OR &&
8305 N->getOperand(0).getOpcode() != ISD::XOR &&
8306 N->getOperand(0).getOpcode() != ISD::SELECT &&
8307 N->getOperand(0).getOpcode() != ISD::SELECT_CC)
8310 SmallVector<SDValue, 4> Inputs;
8311 SmallVector<SDValue, 8> BinOps(1, N->getOperand(0)), PromOps;
8312 SmallPtrSet<SDNode *, 16> Visited;
8314 // Visit all inputs, collect all binary operations (and, or, xor and
8315 // select) that are all fed by truncations.
8316 while (!BinOps.empty()) {
8317 SDValue BinOp = BinOps.back();
8320 if (!Visited.insert(BinOp.getNode()).second)
8323 PromOps.push_back(BinOp);
8325 for (unsigned i = 0, ie = BinOp.getNumOperands(); i != ie; ++i) {
8326 // The condition of the select is not promoted.
8327 if (BinOp.getOpcode() == ISD::SELECT && i == 0)
8329 if (BinOp.getOpcode() == ISD::SELECT_CC && i != 2 && i != 3)
8332 if (BinOp.getOperand(i).getOpcode() == ISD::TRUNCATE ||
8333 isa<ConstantSDNode>(BinOp.getOperand(i))) {
8334 Inputs.push_back(BinOp.getOperand(i));
8335 } else if (BinOp.getOperand(i).getOpcode() == ISD::AND ||
8336 BinOp.getOperand(i).getOpcode() == ISD::OR ||
8337 BinOp.getOperand(i).getOpcode() == ISD::XOR ||
8338 BinOp.getOperand(i).getOpcode() == ISD::SELECT ||
8339 BinOp.getOperand(i).getOpcode() == ISD::SELECT_CC) {
8340 BinOps.push_back(BinOp.getOperand(i));
8342 // We have an input that is not a truncation or another binary
8343 // operation; we'll abort this transformation.
8349 // The operands of a select that must be truncated when the select is
8350 // promoted because the operand is actually part of the to-be-promoted set.
8351 DenseMap<SDNode *, EVT> SelectTruncOp[2];
8353 // Make sure that this is a self-contained cluster of operations (which
8354 // is not quite the same thing as saying that everything has only one
8356 for (unsigned i = 0, ie = Inputs.size(); i != ie; ++i) {
8357 if (isa<ConstantSDNode>(Inputs[i]))
8360 for (SDNode::use_iterator UI = Inputs[i].getNode()->use_begin(),
8361 UE = Inputs[i].getNode()->use_end();
8364 if (User != N && !Visited.count(User))
8367 // If we're going to promote the non-output-value operand(s) or SELECT or
8368 // SELECT_CC, record them for truncation.
8369 if (User->getOpcode() == ISD::SELECT) {
8370 if (User->getOperand(0) == Inputs[i])
8371 SelectTruncOp[0].insert(std::make_pair(User,
8372 User->getOperand(0).getValueType()));
8373 } else if (User->getOpcode() == ISD::SELECT_CC) {
8374 if (User->getOperand(0) == Inputs[i])
8375 SelectTruncOp[0].insert(std::make_pair(User,
8376 User->getOperand(0).getValueType()));
8377 if (User->getOperand(1) == Inputs[i])
8378 SelectTruncOp[1].insert(std::make_pair(User,
8379 User->getOperand(1).getValueType()));
8384 for (unsigned i = 0, ie = PromOps.size(); i != ie; ++i) {
8385 for (SDNode::use_iterator UI = PromOps[i].getNode()->use_begin(),
8386 UE = PromOps[i].getNode()->use_end();
8389 if (User != N && !Visited.count(User))
8392 // If we're going to promote the non-output-value operand(s) or SELECT or
8393 // SELECT_CC, record them for truncation.
8394 if (User->getOpcode() == ISD::SELECT) {
8395 if (User->getOperand(0) == PromOps[i])
8396 SelectTruncOp[0].insert(std::make_pair(User,
8397 User->getOperand(0).getValueType()));
8398 } else if (User->getOpcode() == ISD::SELECT_CC) {
8399 if (User->getOperand(0) == PromOps[i])
8400 SelectTruncOp[0].insert(std::make_pair(User,
8401 User->getOperand(0).getValueType()));
8402 if (User->getOperand(1) == PromOps[i])
8403 SelectTruncOp[1].insert(std::make_pair(User,
8404 User->getOperand(1).getValueType()));
8409 unsigned PromBits = N->getOperand(0).getValueSizeInBits();
8410 bool ReallyNeedsExt = false;
8411 if (N->getOpcode() != ISD::ANY_EXTEND) {
8412 // If all of the inputs are not already sign/zero extended, then
8413 // we'll still need to do that at the end.
8414 for (unsigned i = 0, ie = Inputs.size(); i != ie; ++i) {
8415 if (isa<ConstantSDNode>(Inputs[i]))
8419 Inputs[i].getOperand(0).getValueSizeInBits();
8420 assert(PromBits < OpBits && "Truncation not to a smaller bit count?");
8422 if ((N->getOpcode() == ISD::ZERO_EXTEND &&
8423 !DAG.MaskedValueIsZero(Inputs[i].getOperand(0),
8424 APInt::getHighBitsSet(OpBits,
8425 OpBits-PromBits))) ||
8426 (N->getOpcode() == ISD::SIGN_EXTEND &&
8427 DAG.ComputeNumSignBits(Inputs[i].getOperand(0)) <
8428 (OpBits-(PromBits-1)))) {
8429 ReallyNeedsExt = true;
8435 // Replace all inputs, either with the truncation operand, or a
8436 // truncation or extension to the final output type.
8437 for (unsigned i = 0, ie = Inputs.size(); i != ie; ++i) {
8438 // Constant inputs need to be replaced with the to-be-promoted nodes that
8439 // use them because they might have users outside of the cluster of
8441 if (isa<ConstantSDNode>(Inputs[i]))
8444 SDValue InSrc = Inputs[i].getOperand(0);
8445 if (Inputs[i].getValueType() == N->getValueType(0))
8446 DAG.ReplaceAllUsesOfValueWith(Inputs[i], InSrc);
8447 else if (N->getOpcode() == ISD::SIGN_EXTEND)
8448 DAG.ReplaceAllUsesOfValueWith(Inputs[i],
8449 DAG.getSExtOrTrunc(InSrc, dl, N->getValueType(0)));
8450 else if (N->getOpcode() == ISD::ZERO_EXTEND)
8451 DAG.ReplaceAllUsesOfValueWith(Inputs[i],
8452 DAG.getZExtOrTrunc(InSrc, dl, N->getValueType(0)));
8454 DAG.ReplaceAllUsesOfValueWith(Inputs[i],
8455 DAG.getAnyExtOrTrunc(InSrc, dl, N->getValueType(0)));
8458 // Replace all operations (these are all the same, but have a different
8459 // (promoted) return type). DAG.getNode will validate that the types of
8460 // a binary operator match, so go through the list in reverse so that
8461 // we've likely promoted both operands first.
8462 while (!PromOps.empty()) {
8463 SDValue PromOp = PromOps.back();
8467 switch (PromOp.getOpcode()) {
8468 default: C = 0; break;
8469 case ISD::SELECT: C = 1; break;
8470 case ISD::SELECT_CC: C = 2; break;
8473 if ((!isa<ConstantSDNode>(PromOp.getOperand(C)) &&
8474 PromOp.getOperand(C).getValueType() != N->getValueType(0)) ||
8475 (!isa<ConstantSDNode>(PromOp.getOperand(C+1)) &&
8476 PromOp.getOperand(C+1).getValueType() != N->getValueType(0))) {
8477 // The to-be-promoted operands of this node have not yet been
8478 // promoted (this should be rare because we're going through the
8479 // list backward, but if one of the operands has several users in
8480 // this cluster of to-be-promoted nodes, it is possible).
8481 PromOps.insert(PromOps.begin(), PromOp);
8485 // For SELECT and SELECT_CC nodes, we do a similar check for any
8486 // to-be-promoted comparison inputs.
8487 if (PromOp.getOpcode() == ISD::SELECT ||
8488 PromOp.getOpcode() == ISD::SELECT_CC) {
8489 if ((SelectTruncOp[0].count(PromOp.getNode()) &&
8490 PromOp.getOperand(0).getValueType() != N->getValueType(0)) ||
8491 (SelectTruncOp[1].count(PromOp.getNode()) &&
8492 PromOp.getOperand(1).getValueType() != N->getValueType(0))) {
8493 PromOps.insert(PromOps.begin(), PromOp);
8498 SmallVector<SDValue, 3> Ops(PromOp.getNode()->op_begin(),
8499 PromOp.getNode()->op_end());
8501 // If this node has constant inputs, then they'll need to be promoted here.
8502 for (unsigned i = 0; i < 2; ++i) {
8503 if (!isa<ConstantSDNode>(Ops[C+i]))
8505 if (Ops[C+i].getValueType() == N->getValueType(0))
8508 if (N->getOpcode() == ISD::SIGN_EXTEND)
8509 Ops[C+i] = DAG.getSExtOrTrunc(Ops[C+i], dl, N->getValueType(0));
8510 else if (N->getOpcode() == ISD::ZERO_EXTEND)
8511 Ops[C+i] = DAG.getZExtOrTrunc(Ops[C+i], dl, N->getValueType(0));
8513 Ops[C+i] = DAG.getAnyExtOrTrunc(Ops[C+i], dl, N->getValueType(0));
8516 // If we've promoted the comparison inputs of a SELECT or SELECT_CC,
8517 // truncate them again to the original value type.
8518 if (PromOp.getOpcode() == ISD::SELECT ||
8519 PromOp.getOpcode() == ISD::SELECT_CC) {
8520 auto SI0 = SelectTruncOp[0].find(PromOp.getNode());
8521 if (SI0 != SelectTruncOp[0].end())
8522 Ops[0] = DAG.getNode(ISD::TRUNCATE, dl, SI0->second, Ops[0]);
8523 auto SI1 = SelectTruncOp[1].find(PromOp.getNode());
8524 if (SI1 != SelectTruncOp[1].end())
8525 Ops[1] = DAG.getNode(ISD::TRUNCATE, dl, SI1->second, Ops[1]);
8528 DAG.ReplaceAllUsesOfValueWith(PromOp,
8529 DAG.getNode(PromOp.getOpcode(), dl, N->getValueType(0), Ops));
8532 // Now we're left with the initial extension itself.
8533 if (!ReallyNeedsExt)
8534 return N->getOperand(0);
8536 // To zero extend, just mask off everything except for the first bit (in the
8538 if (N->getOpcode() == ISD::ZERO_EXTEND)
8539 return DAG.getNode(ISD::AND, dl, N->getValueType(0), N->getOperand(0),
8540 DAG.getConstant(APInt::getLowBitsSet(
8541 N->getValueSizeInBits(0), PromBits),
8542 N->getValueType(0)));
8544 assert(N->getOpcode() == ISD::SIGN_EXTEND &&
8545 "Invalid extension type");
8546 EVT ShiftAmountTy = getShiftAmountTy(N->getValueType(0));
8548 DAG.getConstant(N->getValueSizeInBits(0)-PromBits, ShiftAmountTy);
8549 return DAG.getNode(ISD::SRA, dl, N->getValueType(0),
8550 DAG.getNode(ISD::SHL, dl, N->getValueType(0),
8551 N->getOperand(0), ShiftCst), ShiftCst);
8554 SDValue PPCTargetLowering::combineFPToIntToFP(SDNode *N,
8555 DAGCombinerInfo &DCI) const {
8556 assert((N->getOpcode() == ISD::SINT_TO_FP ||
8557 N->getOpcode() == ISD::UINT_TO_FP) &&
8558 "Need an int -> FP conversion node here");
8560 if (!Subtarget.has64BitSupport())
8563 SelectionDAG &DAG = DCI.DAG;
8567 // Don't handle ppc_fp128 here or i1 conversions.
8568 if (Op.getValueType() != MVT::f32 && Op.getValueType() != MVT::f64)
8570 if (Op.getOperand(0).getValueType() == MVT::i1)
8573 // For i32 intermediate values, unfortunately, the conversion functions
8574 // leave the upper 32 bits of the value are undefined. Within the set of
8575 // scalar instructions, we have no method for zero- or sign-extending the
8576 // value. Thus, we cannot handle i32 intermediate values here.
8577 if (Op.getOperand(0).getValueType() == MVT::i32)
8580 assert((Op.getOpcode() == ISD::SINT_TO_FP || Subtarget.hasFPCVT()) &&
8581 "UINT_TO_FP is supported only with FPCVT");
8583 // If we have FCFIDS, then use it when converting to single-precision.
8584 // Otherwise, convert to double-precision and then round.
8585 unsigned FCFOp = (Subtarget.hasFPCVT() && Op.getValueType() == MVT::f32) ?
8586 (Op.getOpcode() == ISD::UINT_TO_FP ?
8587 PPCISD::FCFIDUS : PPCISD::FCFIDS) :
8588 (Op.getOpcode() == ISD::UINT_TO_FP ?
8589 PPCISD::FCFIDU : PPCISD::FCFID);
8590 MVT FCFTy = (Subtarget.hasFPCVT() && Op.getValueType() == MVT::f32) ?
8591 MVT::f32 : MVT::f64;
8593 // If we're converting from a float, to an int, and back to a float again,
8594 // then we don't need the store/load pair at all.
8595 if ((Op.getOperand(0).getOpcode() == ISD::FP_TO_UINT &&
8596 Subtarget.hasFPCVT()) ||
8597 (Op.getOperand(0).getOpcode() == ISD::FP_TO_SINT)) {
8598 SDValue Src = Op.getOperand(0).getOperand(0);
8599 if (Src.getValueType() == MVT::f32) {
8600 Src = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Src);
8601 DCI.AddToWorklist(Src.getNode());
8605 Op.getOperand(0).getOpcode() == ISD::FP_TO_SINT ? PPCISD::FCTIDZ :
8608 SDValue Tmp = DAG.getNode(FCTOp, dl, MVT::f64, Src);
8609 SDValue FP = DAG.getNode(FCFOp, dl, FCFTy, Tmp);
8611 if (Op.getValueType() == MVT::f32 && !Subtarget.hasFPCVT()) {
8612 FP = DAG.getNode(ISD::FP_ROUND, dl,
8613 MVT::f32, FP, DAG.getIntPtrConstant(0));
8614 DCI.AddToWorklist(FP.getNode());
8623 // expandVSXLoadForLE - Convert VSX loads (which may be intrinsics for
8624 // builtins) into loads with swaps.
8625 SDValue PPCTargetLowering::expandVSXLoadForLE(SDNode *N,
8626 DAGCombinerInfo &DCI) const {
8627 SelectionDAG &DAG = DCI.DAG;
8631 MachineMemOperand *MMO;
8633 switch (N->getOpcode()) {
8635 llvm_unreachable("Unexpected opcode for little endian VSX load");
8637 LoadSDNode *LD = cast<LoadSDNode>(N);
8638 Chain = LD->getChain();
8639 Base = LD->getBasePtr();
8640 MMO = LD->getMemOperand();
8641 // If the MMO suggests this isn't a load of a full vector, leave
8642 // things alone. For a built-in, we have to make the change for
8643 // correctness, so if there is a size problem that will be a bug.
8644 if (MMO->getSize() < 16)
8648 case ISD::INTRINSIC_W_CHAIN: {
8649 MemIntrinsicSDNode *Intrin = cast<MemIntrinsicSDNode>(N);
8650 Chain = Intrin->getChain();
8651 Base = Intrin->getBasePtr();
8652 MMO = Intrin->getMemOperand();
8657 MVT VecTy = N->getValueType(0).getSimpleVT();
8658 SDValue LoadOps[] = { Chain, Base };
8659 SDValue Load = DAG.getMemIntrinsicNode(PPCISD::LXVD2X, dl,
8660 DAG.getVTList(VecTy, MVT::Other),
8661 LoadOps, VecTy, MMO);
8662 DCI.AddToWorklist(Load.getNode());
8663 Chain = Load.getValue(1);
8664 SDValue Swap = DAG.getNode(PPCISD::XXSWAPD, dl,
8665 DAG.getVTList(VecTy, MVT::Other), Chain, Load);
8666 DCI.AddToWorklist(Swap.getNode());
8670 // expandVSXStoreForLE - Convert VSX stores (which may be intrinsics for
8671 // builtins) into stores with swaps.
8672 SDValue PPCTargetLowering::expandVSXStoreForLE(SDNode *N,
8673 DAGCombinerInfo &DCI) const {
8674 SelectionDAG &DAG = DCI.DAG;
8679 MachineMemOperand *MMO;
8681 switch (N->getOpcode()) {
8683 llvm_unreachable("Unexpected opcode for little endian VSX store");
8685 StoreSDNode *ST = cast<StoreSDNode>(N);
8686 Chain = ST->getChain();
8687 Base = ST->getBasePtr();
8688 MMO = ST->getMemOperand();
8690 // If the MMO suggests this isn't a store of a full vector, leave
8691 // things alone. For a built-in, we have to make the change for
8692 // correctness, so if there is a size problem that will be a bug.
8693 if (MMO->getSize() < 16)
8697 case ISD::INTRINSIC_VOID: {
8698 MemIntrinsicSDNode *Intrin = cast<MemIntrinsicSDNode>(N);
8699 Chain = Intrin->getChain();
8700 // Intrin->getBasePtr() oddly does not get what we want.
8701 Base = Intrin->getOperand(3);
8702 MMO = Intrin->getMemOperand();
8708 SDValue Src = N->getOperand(SrcOpnd);
8709 MVT VecTy = Src.getValueType().getSimpleVT();
8710 SDValue Swap = DAG.getNode(PPCISD::XXSWAPD, dl,
8711 DAG.getVTList(VecTy, MVT::Other), Chain, Src);
8712 DCI.AddToWorklist(Swap.getNode());
8713 Chain = Swap.getValue(1);
8714 SDValue StoreOps[] = { Chain, Swap, Base };
8715 SDValue Store = DAG.getMemIntrinsicNode(PPCISD::STXVD2X, dl,
8716 DAG.getVTList(MVT::Other),
8717 StoreOps, VecTy, MMO);
8718 DCI.AddToWorklist(Store.getNode());
8722 SDValue PPCTargetLowering::PerformDAGCombine(SDNode *N,
8723 DAGCombinerInfo &DCI) const {
8724 const TargetMachine &TM = getTargetMachine();
8725 SelectionDAG &DAG = DCI.DAG;
8727 switch (N->getOpcode()) {
8730 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(N->getOperand(0))) {
8731 if (C->isNullValue()) // 0 << V -> 0.
8732 return N->getOperand(0);
8736 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(N->getOperand(0))) {
8737 if (C->isNullValue()) // 0 >>u V -> 0.
8738 return N->getOperand(0);
8742 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(N->getOperand(0))) {
8743 if (C->isNullValue() || // 0 >>s V -> 0.
8744 C->isAllOnesValue()) // -1 >>s V -> -1.
8745 return N->getOperand(0);
8748 case ISD::SIGN_EXTEND:
8749 case ISD::ZERO_EXTEND:
8750 case ISD::ANY_EXTEND:
8751 return DAGCombineExtBoolTrunc(N, DCI);
8754 case ISD::SELECT_CC:
8755 return DAGCombineTruncBoolExt(N, DCI);
8756 case ISD::SINT_TO_FP:
8757 case ISD::UINT_TO_FP:
8758 return combineFPToIntToFP(N, DCI);
8760 // Turn STORE (FP_TO_SINT F) -> STFIWX(FCTIWZ(F)).
8761 if (TM.getSubtarget<PPCSubtarget>().hasSTFIWX() &&
8762 !cast<StoreSDNode>(N)->isTruncatingStore() &&
8763 N->getOperand(1).getOpcode() == ISD::FP_TO_SINT &&
8764 N->getOperand(1).getValueType() == MVT::i32 &&
8765 N->getOperand(1).getOperand(0).getValueType() != MVT::ppcf128) {
8766 SDValue Val = N->getOperand(1).getOperand(0);
8767 if (Val.getValueType() == MVT::f32) {
8768 Val = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Val);
8769 DCI.AddToWorklist(Val.getNode());
8771 Val = DAG.getNode(PPCISD::FCTIWZ, dl, MVT::f64, Val);
8772 DCI.AddToWorklist(Val.getNode());
8775 N->getOperand(0), Val, N->getOperand(2),
8776 DAG.getValueType(N->getOperand(1).getValueType())
8779 Val = DAG.getMemIntrinsicNode(PPCISD::STFIWX, dl,
8780 DAG.getVTList(MVT::Other), Ops,
8781 cast<StoreSDNode>(N)->getMemoryVT(),
8782 cast<StoreSDNode>(N)->getMemOperand());
8783 DCI.AddToWorklist(Val.getNode());
8787 // Turn STORE (BSWAP) -> sthbrx/stwbrx.
8788 if (cast<StoreSDNode>(N)->isUnindexed() &&
8789 N->getOperand(1).getOpcode() == ISD::BSWAP &&
8790 N->getOperand(1).getNode()->hasOneUse() &&
8791 (N->getOperand(1).getValueType() == MVT::i32 ||
8792 N->getOperand(1).getValueType() == MVT::i16 ||
8793 (TM.getSubtarget<PPCSubtarget>().hasLDBRX() &&
8794 TM.getSubtarget<PPCSubtarget>().isPPC64() &&
8795 N->getOperand(1).getValueType() == MVT::i64))) {
8796 SDValue BSwapOp = N->getOperand(1).getOperand(0);
8797 // Do an any-extend to 32-bits if this is a half-word input.
8798 if (BSwapOp.getValueType() == MVT::i16)
8799 BSwapOp = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, BSwapOp);
8802 N->getOperand(0), BSwapOp, N->getOperand(2),
8803 DAG.getValueType(N->getOperand(1).getValueType())
8806 DAG.getMemIntrinsicNode(PPCISD::STBRX, dl, DAG.getVTList(MVT::Other),
8807 Ops, cast<StoreSDNode>(N)->getMemoryVT(),
8808 cast<StoreSDNode>(N)->getMemOperand());
8811 // For little endian, VSX stores require generating xxswapd/lxvd2x.
8812 EVT VT = N->getOperand(1).getValueType();
8813 if (VT.isSimple()) {
8814 MVT StoreVT = VT.getSimpleVT();
8815 if (TM.getSubtarget<PPCSubtarget>().hasVSX() &&
8816 TM.getSubtarget<PPCSubtarget>().isLittleEndian() &&
8817 (StoreVT == MVT::v2f64 || StoreVT == MVT::v2i64 ||
8818 StoreVT == MVT::v4f32 || StoreVT == MVT::v4i32))
8819 return expandVSXStoreForLE(N, DCI);
8824 LoadSDNode *LD = cast<LoadSDNode>(N);
8825 EVT VT = LD->getValueType(0);
8827 // For little endian, VSX loads require generating lxvd2x/xxswapd.
8828 if (VT.isSimple()) {
8829 MVT LoadVT = VT.getSimpleVT();
8830 if (TM.getSubtarget<PPCSubtarget>().hasVSX() &&
8831 TM.getSubtarget<PPCSubtarget>().isLittleEndian() &&
8832 (LoadVT == MVT::v2f64 || LoadVT == MVT::v2i64 ||
8833 LoadVT == MVT::v4f32 || LoadVT == MVT::v4i32))
8834 return expandVSXLoadForLE(N, DCI);
8837 Type *Ty = LD->getMemoryVT().getTypeForEVT(*DAG.getContext());
8838 unsigned ABIAlignment = getDataLayout()->getABITypeAlignment(Ty);
8839 if (ISD::isNON_EXTLoad(N) && VT.isVector() &&
8840 TM.getSubtarget<PPCSubtarget>().hasAltivec() &&
8841 // P8 and later hardware should just use LOAD.
8842 !TM.getSubtarget<PPCSubtarget>().hasP8Vector() &&
8843 (VT == MVT::v16i8 || VT == MVT::v8i16 ||
8844 VT == MVT::v4i32 || VT == MVT::v4f32) &&
8845 LD->getAlignment() < ABIAlignment) {
8846 // This is a type-legal unaligned Altivec load.
8847 SDValue Chain = LD->getChain();
8848 SDValue Ptr = LD->getBasePtr();
8849 bool isLittleEndian = Subtarget.isLittleEndian();
8851 // This implements the loading of unaligned vectors as described in
8852 // the venerable Apple Velocity Engine overview. Specifically:
8853 // https://developer.apple.com/hardwaredrivers/ve/alignment.html
8854 // https://developer.apple.com/hardwaredrivers/ve/code_optimization.html
8856 // The general idea is to expand a sequence of one or more unaligned
8857 // loads into an alignment-based permutation-control instruction (lvsl
8858 // or lvsr), a series of regular vector loads (which always truncate
8859 // their input address to an aligned address), and a series of
8860 // permutations. The results of these permutations are the requested
8861 // loaded values. The trick is that the last "extra" load is not taken
8862 // from the address you might suspect (sizeof(vector) bytes after the
8863 // last requested load), but rather sizeof(vector) - 1 bytes after the
8864 // last requested vector. The point of this is to avoid a page fault if
8865 // the base address happened to be aligned. This works because if the
8866 // base address is aligned, then adding less than a full vector length
8867 // will cause the last vector in the sequence to be (re)loaded.
8868 // Otherwise, the next vector will be fetched as you might suspect was
8871 // We might be able to reuse the permutation generation from
8872 // a different base address offset from this one by an aligned amount.
8873 // The INTRINSIC_WO_CHAIN DAG combine will attempt to perform this
8874 // optimization later.
8875 Intrinsic::ID Intr = (isLittleEndian ?
8876 Intrinsic::ppc_altivec_lvsr :
8877 Intrinsic::ppc_altivec_lvsl);
8878 SDValue PermCntl = BuildIntrinsicOp(Intr, Ptr, DAG, dl, MVT::v16i8);
8880 // Create the new MMO for the new base load. It is like the original MMO,
8881 // but represents an area in memory almost twice the vector size centered
8882 // on the original address. If the address is unaligned, we might start
8883 // reading up to (sizeof(vector)-1) bytes below the address of the
8884 // original unaligned load.
8885 MachineFunction &MF = DAG.getMachineFunction();
8886 MachineMemOperand *BaseMMO =
8887 MF.getMachineMemOperand(LD->getMemOperand(),
8888 -LD->getMemoryVT().getStoreSize()+1,
8889 2*LD->getMemoryVT().getStoreSize()-1);
8891 // Create the new base load.
8892 SDValue LDXIntID = DAG.getTargetConstant(Intrinsic::ppc_altivec_lvx,
8894 SDValue BaseLoadOps[] = { Chain, LDXIntID, Ptr };
8896 DAG.getMemIntrinsicNode(ISD::INTRINSIC_W_CHAIN, dl,
8897 DAG.getVTList(MVT::v4i32, MVT::Other),
8898 BaseLoadOps, MVT::v4i32, BaseMMO);
8900 // Note that the value of IncOffset (which is provided to the next
8901 // load's pointer info offset value, and thus used to calculate the
8902 // alignment), and the value of IncValue (which is actually used to
8903 // increment the pointer value) are different! This is because we
8904 // require the next load to appear to be aligned, even though it
8905 // is actually offset from the base pointer by a lesser amount.
8906 int IncOffset = VT.getSizeInBits() / 8;
8907 int IncValue = IncOffset;
8909 // Walk (both up and down) the chain looking for another load at the real
8910 // (aligned) offset (the alignment of the other load does not matter in
8911 // this case). If found, then do not use the offset reduction trick, as
8912 // that will prevent the loads from being later combined (as they would
8913 // otherwise be duplicates).
8914 if (!findConsecutiveLoad(LD, DAG))
8917 SDValue Increment = DAG.getConstant(IncValue, getPointerTy());
8918 Ptr = DAG.getNode(ISD::ADD, dl, Ptr.getValueType(), Ptr, Increment);
8920 MachineMemOperand *ExtraMMO =
8921 MF.getMachineMemOperand(LD->getMemOperand(),
8922 1, 2*LD->getMemoryVT().getStoreSize()-1);
8923 SDValue ExtraLoadOps[] = { Chain, LDXIntID, Ptr };
8925 DAG.getMemIntrinsicNode(ISD::INTRINSIC_W_CHAIN, dl,
8926 DAG.getVTList(MVT::v4i32, MVT::Other),
8927 ExtraLoadOps, MVT::v4i32, ExtraMMO);
8929 SDValue TF = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
8930 BaseLoad.getValue(1), ExtraLoad.getValue(1));
8932 // Because vperm has a big-endian bias, we must reverse the order
8933 // of the input vectors and complement the permute control vector
8934 // when generating little endian code. We have already handled the
8935 // latter by using lvsr instead of lvsl, so just reverse BaseLoad
8936 // and ExtraLoad here.
8939 Perm = BuildIntrinsicOp(Intrinsic::ppc_altivec_vperm,
8940 ExtraLoad, BaseLoad, PermCntl, DAG, dl);
8942 Perm = BuildIntrinsicOp(Intrinsic::ppc_altivec_vperm,
8943 BaseLoad, ExtraLoad, PermCntl, DAG, dl);
8945 if (VT != MVT::v4i32)
8946 Perm = DAG.getNode(ISD::BITCAST, dl, VT, Perm);
8948 // The output of the permutation is our loaded result, the TokenFactor is
8950 DCI.CombineTo(N, Perm, TF);
8951 return SDValue(N, 0);
8955 case ISD::INTRINSIC_WO_CHAIN: {
8956 bool isLittleEndian = Subtarget.isLittleEndian();
8957 Intrinsic::ID Intr = (isLittleEndian ?
8958 Intrinsic::ppc_altivec_lvsr :
8959 Intrinsic::ppc_altivec_lvsl);
8960 if (cast<ConstantSDNode>(N->getOperand(0))->getZExtValue() == Intr &&
8961 N->getOperand(1)->getOpcode() == ISD::ADD) {
8962 SDValue Add = N->getOperand(1);
8964 if (DAG.MaskedValueIsZero(Add->getOperand(1),
8965 APInt::getAllOnesValue(4 /* 16 byte alignment */).zext(
8966 Add.getValueType().getScalarType().getSizeInBits()))) {
8967 SDNode *BasePtr = Add->getOperand(0).getNode();
8968 for (SDNode::use_iterator UI = BasePtr->use_begin(),
8969 UE = BasePtr->use_end(); UI != UE; ++UI) {
8970 if (UI->getOpcode() == ISD::INTRINSIC_WO_CHAIN &&
8971 cast<ConstantSDNode>(UI->getOperand(0))->getZExtValue() ==
8973 // We've found another LVSL/LVSR, and this address is an aligned
8974 // multiple of that one. The results will be the same, so use the
8975 // one we've just found instead.
8977 return SDValue(*UI, 0);
8985 case ISD::INTRINSIC_W_CHAIN: {
8986 // For little endian, VSX loads require generating lxvd2x/xxswapd.
8987 if (TM.getSubtarget<PPCSubtarget>().hasVSX() &&
8988 TM.getSubtarget<PPCSubtarget>().isLittleEndian()) {
8989 switch (cast<ConstantSDNode>(N->getOperand(1))->getZExtValue()) {
8992 case Intrinsic::ppc_vsx_lxvw4x:
8993 case Intrinsic::ppc_vsx_lxvd2x:
8994 return expandVSXLoadForLE(N, DCI);
8999 case ISD::INTRINSIC_VOID: {
9000 // For little endian, VSX stores require generating xxswapd/stxvd2x.
9001 if (TM.getSubtarget<PPCSubtarget>().hasVSX() &&
9002 TM.getSubtarget<PPCSubtarget>().isLittleEndian()) {
9003 switch (cast<ConstantSDNode>(N->getOperand(1))->getZExtValue()) {
9006 case Intrinsic::ppc_vsx_stxvw4x:
9007 case Intrinsic::ppc_vsx_stxvd2x:
9008 return expandVSXStoreForLE(N, DCI);
9014 // Turn BSWAP (LOAD) -> lhbrx/lwbrx.
9015 if (ISD::isNON_EXTLoad(N->getOperand(0).getNode()) &&
9016 N->getOperand(0).hasOneUse() &&
9017 (N->getValueType(0) == MVT::i32 || N->getValueType(0) == MVT::i16 ||
9018 (TM.getSubtarget<PPCSubtarget>().hasLDBRX() &&
9019 TM.getSubtarget<PPCSubtarget>().isPPC64() &&
9020 N->getValueType(0) == MVT::i64))) {
9021 SDValue Load = N->getOperand(0);
9022 LoadSDNode *LD = cast<LoadSDNode>(Load);
9023 // Create the byte-swapping load.
9025 LD->getChain(), // Chain
9026 LD->getBasePtr(), // Ptr
9027 DAG.getValueType(N->getValueType(0)) // VT
9030 DAG.getMemIntrinsicNode(PPCISD::LBRX, dl,
9031 DAG.getVTList(N->getValueType(0) == MVT::i64 ?
9032 MVT::i64 : MVT::i32, MVT::Other),
9033 Ops, LD->getMemoryVT(), LD->getMemOperand());
9035 // If this is an i16 load, insert the truncate.
9036 SDValue ResVal = BSLoad;
9037 if (N->getValueType(0) == MVT::i16)
9038 ResVal = DAG.getNode(ISD::TRUNCATE, dl, MVT::i16, BSLoad);
9040 // First, combine the bswap away. This makes the value produced by the
9042 DCI.CombineTo(N, ResVal);
9044 // Next, combine the load away, we give it a bogus result value but a real
9045 // chain result. The result value is dead because the bswap is dead.
9046 DCI.CombineTo(Load.getNode(), ResVal, BSLoad.getValue(1));
9048 // Return N so it doesn't get rechecked!
9049 return SDValue(N, 0);
9053 case PPCISD::VCMP: {
9054 // If a VCMPo node already exists with exactly the same operands as this
9055 // node, use its result instead of this node (VCMPo computes both a CR6 and
9056 // a normal output).
9058 if (!N->getOperand(0).hasOneUse() &&
9059 !N->getOperand(1).hasOneUse() &&
9060 !N->getOperand(2).hasOneUse()) {
9062 // Scan all of the users of the LHS, looking for VCMPo's that match.
9063 SDNode *VCMPoNode = nullptr;
9065 SDNode *LHSN = N->getOperand(0).getNode();
9066 for (SDNode::use_iterator UI = LHSN->use_begin(), E = LHSN->use_end();
9068 if (UI->getOpcode() == PPCISD::VCMPo &&
9069 UI->getOperand(1) == N->getOperand(1) &&
9070 UI->getOperand(2) == N->getOperand(2) &&
9071 UI->getOperand(0) == N->getOperand(0)) {
9076 // If there is no VCMPo node, or if the flag value has a single use, don't
9078 if (!VCMPoNode || VCMPoNode->hasNUsesOfValue(0, 1))
9081 // Look at the (necessarily single) use of the flag value. If it has a
9082 // chain, this transformation is more complex. Note that multiple things
9083 // could use the value result, which we should ignore.
9084 SDNode *FlagUser = nullptr;
9085 for (SDNode::use_iterator UI = VCMPoNode->use_begin();
9086 FlagUser == nullptr; ++UI) {
9087 assert(UI != VCMPoNode->use_end() && "Didn't find user!");
9089 for (unsigned i = 0, e = User->getNumOperands(); i != e; ++i) {
9090 if (User->getOperand(i) == SDValue(VCMPoNode, 1)) {
9097 // If the user is a MFOCRF instruction, we know this is safe.
9098 // Otherwise we give up for right now.
9099 if (FlagUser->getOpcode() == PPCISD::MFOCRF)
9100 return SDValue(VCMPoNode, 0);
9105 SDValue Cond = N->getOperand(1);
9106 SDValue Target = N->getOperand(2);
9108 if (Cond.getOpcode() == ISD::INTRINSIC_W_CHAIN &&
9109 cast<ConstantSDNode>(Cond.getOperand(1))->getZExtValue() ==
9110 Intrinsic::ppc_is_decremented_ctr_nonzero) {
9112 // We now need to make the intrinsic dead (it cannot be instruction
9114 DAG.ReplaceAllUsesOfValueWith(Cond.getValue(1), Cond.getOperand(0));
9115 assert(Cond.getNode()->hasOneUse() &&
9116 "Counter decrement has more than one use");
9118 return DAG.getNode(PPCISD::BDNZ, dl, MVT::Other,
9119 N->getOperand(0), Target);
9124 // If this is a branch on an altivec predicate comparison, lower this so
9125 // that we don't have to do a MFOCRF: instead, branch directly on CR6. This
9126 // lowering is done pre-legalize, because the legalizer lowers the predicate
9127 // compare down to code that is difficult to reassemble.
9128 ISD::CondCode CC = cast<CondCodeSDNode>(N->getOperand(1))->get();
9129 SDValue LHS = N->getOperand(2), RHS = N->getOperand(3);
9131 // Sometimes the promoted value of the intrinsic is ANDed by some non-zero
9132 // value. If so, pass-through the AND to get to the intrinsic.
9133 if (LHS.getOpcode() == ISD::AND &&
9134 LHS.getOperand(0).getOpcode() == ISD::INTRINSIC_W_CHAIN &&
9135 cast<ConstantSDNode>(LHS.getOperand(0).getOperand(1))->getZExtValue() ==
9136 Intrinsic::ppc_is_decremented_ctr_nonzero &&
9137 isa<ConstantSDNode>(LHS.getOperand(1)) &&
9138 !cast<ConstantSDNode>(LHS.getOperand(1))->getConstantIntValue()->
9140 LHS = LHS.getOperand(0);
9142 if (LHS.getOpcode() == ISD::INTRINSIC_W_CHAIN &&
9143 cast<ConstantSDNode>(LHS.getOperand(1))->getZExtValue() ==
9144 Intrinsic::ppc_is_decremented_ctr_nonzero &&
9145 isa<ConstantSDNode>(RHS)) {
9146 assert((CC == ISD::SETEQ || CC == ISD::SETNE) &&
9147 "Counter decrement comparison is not EQ or NE");
9149 unsigned Val = cast<ConstantSDNode>(RHS)->getZExtValue();
9150 bool isBDNZ = (CC == ISD::SETEQ && Val) ||
9151 (CC == ISD::SETNE && !Val);
9153 // We now need to make the intrinsic dead (it cannot be instruction
9155 DAG.ReplaceAllUsesOfValueWith(LHS.getValue(1), LHS.getOperand(0));
9156 assert(LHS.getNode()->hasOneUse() &&
9157 "Counter decrement has more than one use");
9159 return DAG.getNode(isBDNZ ? PPCISD::BDNZ : PPCISD::BDZ, dl, MVT::Other,
9160 N->getOperand(0), N->getOperand(4));
9166 if (LHS.getOpcode() == ISD::INTRINSIC_WO_CHAIN &&
9167 isa<ConstantSDNode>(RHS) && (CC == ISD::SETEQ || CC == ISD::SETNE) &&
9168 getAltivecCompareInfo(LHS, CompareOpc, isDot)) {
9169 assert(isDot && "Can't compare against a vector result!");
9171 // If this is a comparison against something other than 0/1, then we know
9172 // that the condition is never/always true.
9173 unsigned Val = cast<ConstantSDNode>(RHS)->getZExtValue();
9174 if (Val != 0 && Val != 1) {
9175 if (CC == ISD::SETEQ) // Cond never true, remove branch.
9176 return N->getOperand(0);
9177 // Always !=, turn it into an unconditional branch.
9178 return DAG.getNode(ISD::BR, dl, MVT::Other,
9179 N->getOperand(0), N->getOperand(4));
9182 bool BranchOnWhenPredTrue = (CC == ISD::SETEQ) ^ (Val == 0);
9184 // Create the PPCISD altivec 'dot' comparison node.
9186 LHS.getOperand(2), // LHS of compare
9187 LHS.getOperand(3), // RHS of compare
9188 DAG.getConstant(CompareOpc, MVT::i32)
9190 EVT VTs[] = { LHS.getOperand(2).getValueType(), MVT::Glue };
9191 SDValue CompNode = DAG.getNode(PPCISD::VCMPo, dl, VTs, Ops);
9193 // Unpack the result based on how the target uses it.
9194 PPC::Predicate CompOpc;
9195 switch (cast<ConstantSDNode>(LHS.getOperand(1))->getZExtValue()) {
9196 default: // Can't happen, don't crash on invalid number though.
9197 case 0: // Branch on the value of the EQ bit of CR6.
9198 CompOpc = BranchOnWhenPredTrue ? PPC::PRED_EQ : PPC::PRED_NE;
9200 case 1: // Branch on the inverted value of the EQ bit of CR6.
9201 CompOpc = BranchOnWhenPredTrue ? PPC::PRED_NE : PPC::PRED_EQ;
9203 case 2: // Branch on the value of the LT bit of CR6.
9204 CompOpc = BranchOnWhenPredTrue ? PPC::PRED_LT : PPC::PRED_GE;
9206 case 3: // Branch on the inverted value of the LT bit of CR6.
9207 CompOpc = BranchOnWhenPredTrue ? PPC::PRED_GE : PPC::PRED_LT;
9211 return DAG.getNode(PPCISD::COND_BRANCH, dl, MVT::Other, N->getOperand(0),
9212 DAG.getConstant(CompOpc, MVT::i32),
9213 DAG.getRegister(PPC::CR6, MVT::i32),
9214 N->getOperand(4), CompNode.getValue(1));
9224 PPCTargetLowering::BuildSDIVPow2(SDNode *N, const APInt &Divisor,
9226 std::vector<SDNode *> *Created) const {
9227 // fold (sdiv X, pow2)
9228 EVT VT = N->getValueType(0);
9229 if (VT == MVT::i64 && !Subtarget.isPPC64())
9231 if ((VT != MVT::i32 && VT != MVT::i64) ||
9232 !(Divisor.isPowerOf2() || (-Divisor).isPowerOf2()))
9236 SDValue N0 = N->getOperand(0);
9238 bool IsNegPow2 = (-Divisor).isPowerOf2();
9239 unsigned Lg2 = (IsNegPow2 ? -Divisor : Divisor).countTrailingZeros();
9240 SDValue ShiftAmt = DAG.getConstant(Lg2, VT);
9242 SDValue Op = DAG.getNode(PPCISD::SRA_ADDZE, DL, VT, N0, ShiftAmt);
9244 Created->push_back(Op.getNode());
9247 Op = DAG.getNode(ISD::SUB, DL, VT, DAG.getConstant(0, VT), Op);
9249 Created->push_back(Op.getNode());
9255 //===----------------------------------------------------------------------===//
9256 // Inline Assembly Support
9257 //===----------------------------------------------------------------------===//
9259 void PPCTargetLowering::computeKnownBitsForTargetNode(const SDValue Op,
9262 const SelectionDAG &DAG,
9263 unsigned Depth) const {
9264 KnownZero = KnownOne = APInt(KnownZero.getBitWidth(), 0);
9265 switch (Op.getOpcode()) {
9267 case PPCISD::LBRX: {
9268 // lhbrx is known to have the top bits cleared out.
9269 if (cast<VTSDNode>(Op.getOperand(2))->getVT() == MVT::i16)
9270 KnownZero = 0xFFFF0000;
9273 case ISD::INTRINSIC_WO_CHAIN: {
9274 switch (cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue()) {
9276 case Intrinsic::ppc_altivec_vcmpbfp_p:
9277 case Intrinsic::ppc_altivec_vcmpeqfp_p:
9278 case Intrinsic::ppc_altivec_vcmpequb_p:
9279 case Intrinsic::ppc_altivec_vcmpequh_p:
9280 case Intrinsic::ppc_altivec_vcmpequw_p:
9281 case Intrinsic::ppc_altivec_vcmpgefp_p:
9282 case Intrinsic::ppc_altivec_vcmpgtfp_p:
9283 case Intrinsic::ppc_altivec_vcmpgtsb_p:
9284 case Intrinsic::ppc_altivec_vcmpgtsh_p:
9285 case Intrinsic::ppc_altivec_vcmpgtsw_p:
9286 case Intrinsic::ppc_altivec_vcmpgtub_p:
9287 case Intrinsic::ppc_altivec_vcmpgtuh_p:
9288 case Intrinsic::ppc_altivec_vcmpgtuw_p:
9289 KnownZero = ~1U; // All bits but the low one are known to be zero.
9296 unsigned PPCTargetLowering::getPrefLoopAlignment(MachineLoop *ML) const {
9297 switch (Subtarget.getDarwinDirective()) {
9302 case PPC::DIR_PWR5X:
9304 case PPC::DIR_PWR6X:
9306 case PPC::DIR_PWR8: {
9310 const PPCInstrInfo *TII =
9311 static_cast<const PPCInstrInfo *>(getTargetMachine().getSubtargetImpl()->
9314 // For small loops (between 5 and 8 instructions), align to a 32-byte
9315 // boundary so that the entire loop fits in one instruction-cache line.
9316 uint64_t LoopSize = 0;
9317 for (auto I = ML->block_begin(), IE = ML->block_end(); I != IE; ++I)
9318 for (auto J = (*I)->begin(), JE = (*I)->end(); J != JE; ++J)
9319 LoopSize += TII->GetInstSizeInBytes(J);
9321 if (LoopSize > 16 && LoopSize <= 32)
9328 return TargetLowering::getPrefLoopAlignment(ML);
9331 /// getConstraintType - Given a constraint, return the type of
9332 /// constraint it is for this target.
9333 PPCTargetLowering::ConstraintType
9334 PPCTargetLowering::getConstraintType(const std::string &Constraint) const {
9335 if (Constraint.size() == 1) {
9336 switch (Constraint[0]) {
9343 return C_RegisterClass;
9345 // FIXME: While Z does indicate a memory constraint, it specifically
9346 // indicates an r+r address (used in conjunction with the 'y' modifier
9347 // in the replacement string). Currently, we're forcing the base
9348 // register to be r0 in the asm printer (which is interpreted as zero)
9349 // and forming the complete address in the second register. This is
9353 } else if (Constraint == "wc") { // individual CR bits.
9354 return C_RegisterClass;
9355 } else if (Constraint == "wa" || Constraint == "wd" ||
9356 Constraint == "wf" || Constraint == "ws") {
9357 return C_RegisterClass; // VSX registers.
9359 return TargetLowering::getConstraintType(Constraint);
9362 /// Examine constraint type and operand type and determine a weight value.
9363 /// This object must already have been set up with the operand type
9364 /// and the current alternative constraint selected.
9365 TargetLowering::ConstraintWeight
9366 PPCTargetLowering::getSingleConstraintMatchWeight(
9367 AsmOperandInfo &info, const char *constraint) const {
9368 ConstraintWeight weight = CW_Invalid;
9369 Value *CallOperandVal = info.CallOperandVal;
9370 // If we don't have a value, we can't do a match,
9371 // but allow it at the lowest weight.
9372 if (!CallOperandVal)
9374 Type *type = CallOperandVal->getType();
9376 // Look at the constraint type.
9377 if (StringRef(constraint) == "wc" && type->isIntegerTy(1))
9378 return CW_Register; // an individual CR bit.
9379 else if ((StringRef(constraint) == "wa" ||
9380 StringRef(constraint) == "wd" ||
9381 StringRef(constraint) == "wf") &&
9384 else if (StringRef(constraint) == "ws" && type->isDoubleTy())
9387 switch (*constraint) {
9389 weight = TargetLowering::getSingleConstraintMatchWeight(info, constraint);
9392 if (type->isIntegerTy())
9393 weight = CW_Register;
9396 if (type->isFloatTy())
9397 weight = CW_Register;
9400 if (type->isDoubleTy())
9401 weight = CW_Register;
9404 if (type->isVectorTy())
9405 weight = CW_Register;
9408 weight = CW_Register;
9417 std::pair<unsigned, const TargetRegisterClass*>
9418 PPCTargetLowering::getRegForInlineAsmConstraint(const std::string &Constraint,
9420 if (Constraint.size() == 1) {
9421 // GCC RS6000 Constraint Letters
9422 switch (Constraint[0]) {
9424 if (VT == MVT::i64 && Subtarget.isPPC64())
9425 return std::make_pair(0U, &PPC::G8RC_NOX0RegClass);
9426 return std::make_pair(0U, &PPC::GPRC_NOR0RegClass);
9428 if (VT == MVT::i64 && Subtarget.isPPC64())
9429 return std::make_pair(0U, &PPC::G8RCRegClass);
9430 return std::make_pair(0U, &PPC::GPRCRegClass);
9432 if (VT == MVT::f32 || VT == MVT::i32)
9433 return std::make_pair(0U, &PPC::F4RCRegClass);
9434 if (VT == MVT::f64 || VT == MVT::i64)
9435 return std::make_pair(0U, &PPC::F8RCRegClass);
9438 return std::make_pair(0U, &PPC::VRRCRegClass);
9440 return std::make_pair(0U, &PPC::CRRCRegClass);
9442 } else if (Constraint == "wc") { // an individual CR bit.
9443 return std::make_pair(0U, &PPC::CRBITRCRegClass);
9444 } else if (Constraint == "wa" || Constraint == "wd" ||
9445 Constraint == "wf") {
9446 return std::make_pair(0U, &PPC::VSRCRegClass);
9447 } else if (Constraint == "ws") {
9448 return std::make_pair(0U, &PPC::VSFRCRegClass);
9451 std::pair<unsigned, const TargetRegisterClass*> R =
9452 TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
9454 // r[0-9]+ are used, on PPC64, to refer to the corresponding 64-bit registers
9455 // (which we call X[0-9]+). If a 64-bit value has been requested, and a
9456 // 32-bit GPR has been selected, then 'upgrade' it to the 64-bit parent
9458 // FIXME: If TargetLowering::getRegForInlineAsmConstraint could somehow use
9459 // the AsmName field from *RegisterInfo.td, then this would not be necessary.
9460 if (R.first && VT == MVT::i64 && Subtarget.isPPC64() &&
9461 PPC::GPRCRegClass.contains(R.first)) {
9462 const TargetRegisterInfo *TRI =
9463 getTargetMachine().getSubtargetImpl()->getRegisterInfo();
9464 return std::make_pair(TRI->getMatchingSuperReg(R.first,
9465 PPC::sub_32, &PPC::G8RCRegClass),
9466 &PPC::G8RCRegClass);
9469 // GCC accepts 'cc' as an alias for 'cr0', and we need to do the same.
9470 if (!R.second && StringRef("{cc}").equals_lower(Constraint)) {
9472 R.second = &PPC::CRRCRegClass;
9479 /// LowerAsmOperandForConstraint - Lower the specified operand into the Ops
9480 /// vector. If it is invalid, don't add anything to Ops.
9481 void PPCTargetLowering::LowerAsmOperandForConstraint(SDValue Op,
9482 std::string &Constraint,
9483 std::vector<SDValue>&Ops,
9484 SelectionDAG &DAG) const {
9487 // Only support length 1 constraints.
9488 if (Constraint.length() > 1) return;
9490 char Letter = Constraint[0];
9501 ConstantSDNode *CST = dyn_cast<ConstantSDNode>(Op);
9502 if (!CST) return; // Must be an immediate to match.
9503 int64_t Value = CST->getSExtValue();
9504 EVT TCVT = MVT::i64; // All constants taken to be 64 bits so that negative
9505 // numbers are printed as such.
9507 default: llvm_unreachable("Unknown constraint letter!");
9508 case 'I': // "I" is a signed 16-bit constant.
9509 if (isInt<16>(Value))
9510 Result = DAG.getTargetConstant(Value, TCVT);
9512 case 'J': // "J" is a constant with only the high-order 16 bits nonzero.
9513 if (isShiftedUInt<16, 16>(Value))
9514 Result = DAG.getTargetConstant(Value, TCVT);
9516 case 'L': // "L" is a signed 16-bit constant shifted left 16 bits.
9517 if (isShiftedInt<16, 16>(Value))
9518 Result = DAG.getTargetConstant(Value, TCVT);
9520 case 'K': // "K" is a constant with only the low-order 16 bits nonzero.
9521 if (isUInt<16>(Value))
9522 Result = DAG.getTargetConstant(Value, TCVT);
9524 case 'M': // "M" is a constant that is greater than 31.
9526 Result = DAG.getTargetConstant(Value, TCVT);
9528 case 'N': // "N" is a positive constant that is an exact power of two.
9529 if (Value > 0 && isPowerOf2_64(Value))
9530 Result = DAG.getTargetConstant(Value, TCVT);
9532 case 'O': // "O" is the constant zero.
9534 Result = DAG.getTargetConstant(Value, TCVT);
9536 case 'P': // "P" is a constant whose negation is a signed 16-bit constant.
9537 if (isInt<16>(-Value))
9538 Result = DAG.getTargetConstant(Value, TCVT);
9545 if (Result.getNode()) {
9546 Ops.push_back(Result);
9550 // Handle standard constraint letters.
9551 TargetLowering::LowerAsmOperandForConstraint(Op, Constraint, Ops, DAG);
9554 // isLegalAddressingMode - Return true if the addressing mode represented
9555 // by AM is legal for this target, for a load/store of the specified type.
9556 bool PPCTargetLowering::isLegalAddressingMode(const AddrMode &AM,
9558 // FIXME: PPC does not allow r+i addressing modes for vectors!
9560 // PPC allows a sign-extended 16-bit immediate field.
9561 if (AM.BaseOffs <= -(1LL << 16) || AM.BaseOffs >= (1LL << 16)-1)
9564 // No global is ever allowed as a base.
9568 // PPC only support r+r,
9570 case 0: // "r+i" or just "i", depending on HasBaseReg.
9573 if (AM.HasBaseReg && AM.BaseOffs) // "r+r+i" is not allowed.
9575 // Otherwise we have r+r or r+i.
9578 if (AM.HasBaseReg || AM.BaseOffs) // 2*r+r or 2*r+i is not allowed.
9580 // Allow 2*r as r+r.
9583 // No other scales are supported.
9590 SDValue PPCTargetLowering::LowerRETURNADDR(SDValue Op,
9591 SelectionDAG &DAG) const {
9592 MachineFunction &MF = DAG.getMachineFunction();
9593 MachineFrameInfo *MFI = MF.getFrameInfo();
9594 MFI->setReturnAddressIsTaken(true);
9596 if (verifyReturnAddressArgumentIsConstant(Op, DAG))
9600 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
9602 // Make sure the function does not optimize away the store of the RA to
9604 PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>();
9605 FuncInfo->setLRStoreRequired();
9606 bool isPPC64 = Subtarget.isPPC64();
9607 bool isDarwinABI = Subtarget.isDarwinABI();
9610 SDValue FrameAddr = LowerFRAMEADDR(Op, DAG);
9613 DAG.getConstant(PPCFrameLowering::getReturnSaveOffset(isPPC64, isDarwinABI),
9614 isPPC64? MVT::i64 : MVT::i32);
9615 return DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
9616 DAG.getNode(ISD::ADD, dl, getPointerTy(),
9618 MachinePointerInfo(), false, false, false, 0);
9621 // Just load the return address off the stack.
9622 SDValue RetAddrFI = getReturnAddrFrameIndex(DAG);
9623 return DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
9624 RetAddrFI, MachinePointerInfo(), false, false, false, 0);
9627 SDValue PPCTargetLowering::LowerFRAMEADDR(SDValue Op,
9628 SelectionDAG &DAG) const {
9630 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
9632 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
9633 bool isPPC64 = PtrVT == MVT::i64;
9635 MachineFunction &MF = DAG.getMachineFunction();
9636 MachineFrameInfo *MFI = MF.getFrameInfo();
9637 MFI->setFrameAddressIsTaken(true);
9639 // Naked functions never have a frame pointer, and so we use r1. For all
9640 // other functions, this decision must be delayed until during PEI.
9642 if (MF.getFunction()->getAttributes().hasAttribute(
9643 AttributeSet::FunctionIndex, Attribute::Naked))
9644 FrameReg = isPPC64 ? PPC::X1 : PPC::R1;
9646 FrameReg = isPPC64 ? PPC::FP8 : PPC::FP;
9648 SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, FrameReg,
9651 FrameAddr = DAG.getLoad(Op.getValueType(), dl, DAG.getEntryNode(),
9652 FrameAddr, MachinePointerInfo(), false, false,
9657 // FIXME? Maybe this could be a TableGen attribute on some registers and
9658 // this table could be generated automatically from RegInfo.
9659 unsigned PPCTargetLowering::getRegisterByName(const char* RegName,
9661 bool isPPC64 = Subtarget.isPPC64();
9662 bool isDarwinABI = Subtarget.isDarwinABI();
9664 if ((isPPC64 && VT != MVT::i64 && VT != MVT::i32) ||
9665 (!isPPC64 && VT != MVT::i32))
9666 report_fatal_error("Invalid register global variable type");
9668 bool is64Bit = isPPC64 && VT == MVT::i64;
9669 unsigned Reg = StringSwitch<unsigned>(RegName)
9670 .Case("r1", is64Bit ? PPC::X1 : PPC::R1)
9671 .Case("r2", isDarwinABI ? 0 : (is64Bit ? PPC::X2 : PPC::R2))
9672 .Case("r13", (!isPPC64 && isDarwinABI) ? 0 :
9673 (is64Bit ? PPC::X13 : PPC::R13))
9678 report_fatal_error("Invalid register name global variable");
9682 PPCTargetLowering::isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const {
9683 // The PowerPC target isn't yet aware of offsets.
9687 bool PPCTargetLowering::getTgtMemIntrinsic(IntrinsicInfo &Info,
9689 unsigned Intrinsic) const {
9691 switch (Intrinsic) {
9692 case Intrinsic::ppc_altivec_lvx:
9693 case Intrinsic::ppc_altivec_lvxl:
9694 case Intrinsic::ppc_altivec_lvebx:
9695 case Intrinsic::ppc_altivec_lvehx:
9696 case Intrinsic::ppc_altivec_lvewx:
9697 case Intrinsic::ppc_vsx_lxvd2x:
9698 case Intrinsic::ppc_vsx_lxvw4x: {
9700 switch (Intrinsic) {
9701 case Intrinsic::ppc_altivec_lvebx:
9704 case Intrinsic::ppc_altivec_lvehx:
9707 case Intrinsic::ppc_altivec_lvewx:
9710 case Intrinsic::ppc_vsx_lxvd2x:
9718 Info.opc = ISD::INTRINSIC_W_CHAIN;
9720 Info.ptrVal = I.getArgOperand(0);
9721 Info.offset = -VT.getStoreSize()+1;
9722 Info.size = 2*VT.getStoreSize()-1;
9725 Info.readMem = true;
9726 Info.writeMem = false;
9729 case Intrinsic::ppc_altivec_stvx:
9730 case Intrinsic::ppc_altivec_stvxl:
9731 case Intrinsic::ppc_altivec_stvebx:
9732 case Intrinsic::ppc_altivec_stvehx:
9733 case Intrinsic::ppc_altivec_stvewx:
9734 case Intrinsic::ppc_vsx_stxvd2x:
9735 case Intrinsic::ppc_vsx_stxvw4x: {
9737 switch (Intrinsic) {
9738 case Intrinsic::ppc_altivec_stvebx:
9741 case Intrinsic::ppc_altivec_stvehx:
9744 case Intrinsic::ppc_altivec_stvewx:
9747 case Intrinsic::ppc_vsx_stxvd2x:
9755 Info.opc = ISD::INTRINSIC_VOID;
9757 Info.ptrVal = I.getArgOperand(1);
9758 Info.offset = -VT.getStoreSize()+1;
9759 Info.size = 2*VT.getStoreSize()-1;
9762 Info.readMem = false;
9763 Info.writeMem = true;
9773 /// getOptimalMemOpType - Returns the target specific optimal type for load
9774 /// and store operations as a result of memset, memcpy, and memmove
9775 /// lowering. If DstAlign is zero that means it's safe to destination
9776 /// alignment can satisfy any constraint. Similarly if SrcAlign is zero it
9777 /// means there isn't a need to check it against alignment requirement,
9778 /// probably because the source does not need to be loaded. If 'IsMemset' is
9779 /// true, that means it's expanding a memset. If 'ZeroMemset' is true, that
9780 /// means it's a memset of zero. 'MemcpyStrSrc' indicates whether the memcpy
9781 /// source is constant so it does not need to be loaded.
9782 /// It returns EVT::Other if the type should be determined using generic
9783 /// target-independent logic.
9784 EVT PPCTargetLowering::getOptimalMemOpType(uint64_t Size,
9785 unsigned DstAlign, unsigned SrcAlign,
9786 bool IsMemset, bool ZeroMemset,
9788 MachineFunction &MF) const {
9789 if (Subtarget.isPPC64()) {
9796 /// \brief Returns true if it is beneficial to convert a load of a constant
9797 /// to just the constant itself.
9798 bool PPCTargetLowering::shouldConvertConstantLoadToIntImm(const APInt &Imm,
9800 assert(Ty->isIntegerTy());
9802 unsigned BitSize = Ty->getPrimitiveSizeInBits();
9803 if (BitSize == 0 || BitSize > 64)
9808 bool PPCTargetLowering::isTruncateFree(Type *Ty1, Type *Ty2) const {
9809 if (!Ty1->isIntegerTy() || !Ty2->isIntegerTy())
9811 unsigned NumBits1 = Ty1->getPrimitiveSizeInBits();
9812 unsigned NumBits2 = Ty2->getPrimitiveSizeInBits();
9813 return NumBits1 == 64 && NumBits2 == 32;
9816 bool PPCTargetLowering::isTruncateFree(EVT VT1, EVT VT2) const {
9817 if (!VT1.isInteger() || !VT2.isInteger())
9819 unsigned NumBits1 = VT1.getSizeInBits();
9820 unsigned NumBits2 = VT2.getSizeInBits();
9821 return NumBits1 == 64 && NumBits2 == 32;
9824 bool PPCTargetLowering::isZExtFree(SDValue Val, EVT VT2) const {
9825 // Generally speaking, zexts are not free, but they are free when they can be
9826 // folded with other operations.
9827 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(Val)) {
9828 EVT MemVT = LD->getMemoryVT();
9829 if ((MemVT == MVT::i1 || MemVT == MVT::i8 || MemVT == MVT::i16 ||
9830 (Subtarget.isPPC64() && MemVT == MVT::i32)) &&
9831 (LD->getExtensionType() == ISD::NON_EXTLOAD ||
9832 LD->getExtensionType() == ISD::ZEXTLOAD))
9836 // FIXME: Add other cases...
9837 // - 32-bit shifts with a zext to i64
9838 // - zext after ctlz, bswap, etc.
9839 // - zext after and by a constant mask
9841 return TargetLowering::isZExtFree(Val, VT2);
9844 bool PPCTargetLowering::isFPExtFree(EVT VT) const {
9845 assert(VT.isFloatingPoint());
9849 bool PPCTargetLowering::isLegalICmpImmediate(int64_t Imm) const {
9850 return isInt<16>(Imm) || isUInt<16>(Imm);
9853 bool PPCTargetLowering::isLegalAddImmediate(int64_t Imm) const {
9854 return isInt<16>(Imm) || isUInt<16>(Imm);
9857 bool PPCTargetLowering::allowsMisalignedMemoryAccesses(EVT VT,
9861 if (DisablePPCUnaligned)
9864 // PowerPC supports unaligned memory access for simple non-vector types.
9865 // Although accessing unaligned addresses is not as efficient as accessing
9866 // aligned addresses, it is generally more efficient than manual expansion,
9867 // and generally only traps for software emulation when crossing page
9873 if (VT.getSimpleVT().isVector()) {
9874 if (Subtarget.hasVSX()) {
9875 if (VT != MVT::v2f64 && VT != MVT::v2i64 &&
9876 VT != MVT::v4f32 && VT != MVT::v4i32)
9883 if (VT == MVT::ppcf128)
9892 bool PPCTargetLowering::isFMAFasterThanFMulAndFAdd(EVT VT) const {
9893 VT = VT.getScalarType();
9898 switch (VT.getSimpleVT().SimpleTy) {
9910 PPCTargetLowering::getScratchRegisters(CallingConv::ID) const {
9911 // LR is a callee-save register, but we must treat it as clobbered by any call
9912 // site. Hence we include LR in the scratch registers, which are in turn added
9913 // as implicit-defs for stackmaps and patchpoints. The same reasoning applies
9914 // to CTR, which is used by any indirect call.
9915 static const MCPhysReg ScratchRegs[] = {
9916 PPC::X11, PPC::X12, PPC::LR8, PPC::CTR8, 0
9923 PPCTargetLowering::shouldExpandBuildVectorWithShuffles(
9924 EVT VT , unsigned DefinedValues) const {
9925 if (VT == MVT::v2i64)
9928 return TargetLowering::shouldExpandBuildVectorWithShuffles(VT, DefinedValues);
9931 Sched::Preference PPCTargetLowering::getSchedulingPreference(SDNode *N) const {
9932 if (DisableILPPref || Subtarget.enableMachineScheduler())
9933 return TargetLowering::getSchedulingPreference(N);
9938 // Create a fast isel object.
9940 PPCTargetLowering::createFastISel(FunctionLoweringInfo &FuncInfo,
9941 const TargetLibraryInfo *LibInfo) const {
9942 return PPC::createFastISel(FuncInfo, LibInfo);