1 //===-- ARMExpandPseudoInsts.cpp - Expand pseudo instructions -------------===//
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 contains a pass that expands pseudo instructions into target
11 // instructions to allow proper scheduling, if-conversion, and other late
12 // optimizations. This pass should be run after register allocation but before
13 // the post-regalloc scheduling pass.
15 //===----------------------------------------------------------------------===//
18 #include "ARMBaseInstrInfo.h"
19 #include "ARMBaseRegisterInfo.h"
20 #include "ARMConstantPoolValue.h"
21 #include "ARMMachineFunctionInfo.h"
22 #include "ARMSubtarget.h"
23 #include "MCTargetDesc/ARMAddressingModes.h"
24 #include "llvm/CodeGen/LivePhysRegs.h"
25 #include "llvm/CodeGen/MachineFrameInfo.h"
26 #include "llvm/CodeGen/MachineFunctionPass.h"
27 #include "llvm/CodeGen/MachineInstrBuilder.h"
28 #include "llvm/CodeGen/MachineInstrBundle.h"
29 #include "llvm/IR/GlobalValue.h"
30 #include "llvm/Support/CommandLine.h"
31 #include "llvm/Support/raw_ostream.h" // FIXME: for debug only. remove!
32 #include "llvm/Target/TargetFrameLowering.h"
33 #include "llvm/Target/TargetRegisterInfo.h"
37 #define DEBUG_TYPE "arm-pseudo"
40 VerifyARMPseudo("verify-arm-pseudo-expand", cl::Hidden,
41 cl::desc("Verify machine code after expanding ARM pseudos"));
44 class ARMExpandPseudo : public MachineFunctionPass {
47 ARMExpandPseudo() : MachineFunctionPass(ID) {}
49 const ARMBaseInstrInfo *TII;
50 const TargetRegisterInfo *TRI;
51 const ARMSubtarget *STI;
54 bool runOnMachineFunction(MachineFunction &Fn) override;
56 MachineFunctionProperties getRequiredProperties() const override {
57 return MachineFunctionProperties().set(
58 MachineFunctionProperties::Property::NoVRegs);
61 StringRef getPassName() const override {
62 return "ARM pseudo instruction expansion pass";
66 void TransferImpOps(MachineInstr &OldMI,
67 MachineInstrBuilder &UseMI, MachineInstrBuilder &DefMI);
68 bool ExpandMI(MachineBasicBlock &MBB,
69 MachineBasicBlock::iterator MBBI,
70 MachineBasicBlock::iterator &NextMBBI);
71 bool ExpandMBB(MachineBasicBlock &MBB);
72 void ExpandVLD(MachineBasicBlock::iterator &MBBI);
73 void ExpandVST(MachineBasicBlock::iterator &MBBI);
74 void ExpandLaneOp(MachineBasicBlock::iterator &MBBI);
75 void ExpandVTBL(MachineBasicBlock::iterator &MBBI,
76 unsigned Opc, bool IsExt);
77 void ExpandMOV32BitImm(MachineBasicBlock &MBB,
78 MachineBasicBlock::iterator &MBBI);
79 bool ExpandCMP_SWAP(MachineBasicBlock &MBB,
80 MachineBasicBlock::iterator MBBI, unsigned LdrexOp,
81 unsigned StrexOp, unsigned UxtOp,
82 MachineBasicBlock::iterator &NextMBBI);
84 bool ExpandCMP_SWAP_64(MachineBasicBlock &MBB,
85 MachineBasicBlock::iterator MBBI,
86 MachineBasicBlock::iterator &NextMBBI);
88 char ARMExpandPseudo::ID = 0;
91 /// TransferImpOps - Transfer implicit operands on the pseudo instruction to
92 /// the instructions created from the expansion.
93 void ARMExpandPseudo::TransferImpOps(MachineInstr &OldMI,
94 MachineInstrBuilder &UseMI,
95 MachineInstrBuilder &DefMI) {
96 const MCInstrDesc &Desc = OldMI.getDesc();
97 for (unsigned i = Desc.getNumOperands(), e = OldMI.getNumOperands();
99 const MachineOperand &MO = OldMI.getOperand(i);
100 assert(MO.isReg() && MO.getReg());
109 // Constants for register spacing in NEON load/store instructions.
110 // For quad-register load-lane and store-lane pseudo instructors, the
111 // spacing is initially assumed to be EvenDblSpc, and that is changed to
112 // OddDblSpc depending on the lane number operand.
113 enum NEONRegSpacing {
119 // Entries for NEON load/store information table. The table is sorted by
120 // PseudoOpc for fast binary-search lookups.
121 struct NEONLdStTableEntry {
126 bool hasWritebackOperand;
127 uint8_t RegSpacing; // One of type NEONRegSpacing
128 uint8_t NumRegs; // D registers loaded or stored
129 uint8_t RegElts; // elements per D register; used for lane ops
130 // FIXME: Temporary flag to denote whether the real instruction takes
131 // a single register (like the encoding) or all of the registers in
132 // the list (like the asm syntax and the isel DAG). When all definitions
133 // are converted to take only the single encoded register, this will
135 bool copyAllListRegs;
137 // Comparison methods for binary search of the table.
138 bool operator<(const NEONLdStTableEntry &TE) const {
139 return PseudoOpc < TE.PseudoOpc;
141 friend bool operator<(const NEONLdStTableEntry &TE, unsigned PseudoOpc) {
142 return TE.PseudoOpc < PseudoOpc;
144 friend bool LLVM_ATTRIBUTE_UNUSED operator<(unsigned PseudoOpc,
145 const NEONLdStTableEntry &TE) {
146 return PseudoOpc < TE.PseudoOpc;
151 static const NEONLdStTableEntry NEONLdStTable[] = {
152 { ARM::VLD1LNq16Pseudo, ARM::VLD1LNd16, true, false, false, EvenDblSpc, 1, 4 ,true},
153 { ARM::VLD1LNq16Pseudo_UPD, ARM::VLD1LNd16_UPD, true, true, true, EvenDblSpc, 1, 4 ,true},
154 { ARM::VLD1LNq32Pseudo, ARM::VLD1LNd32, true, false, false, EvenDblSpc, 1, 2 ,true},
155 { ARM::VLD1LNq32Pseudo_UPD, ARM::VLD1LNd32_UPD, true, true, true, EvenDblSpc, 1, 2 ,true},
156 { ARM::VLD1LNq8Pseudo, ARM::VLD1LNd8, true, false, false, EvenDblSpc, 1, 8 ,true},
157 { ARM::VLD1LNq8Pseudo_UPD, ARM::VLD1LNd8_UPD, true, true, true, EvenDblSpc, 1, 8 ,true},
159 { ARM::VLD1d64QPseudo, ARM::VLD1d64Q, true, false, false, SingleSpc, 4, 1 ,false},
160 { ARM::VLD1d64QPseudoWB_fixed, ARM::VLD1d64Qwb_fixed, true, true, false, SingleSpc, 4, 1 ,false},
161 { ARM::VLD1d64TPseudo, ARM::VLD1d64T, true, false, false, SingleSpc, 3, 1 ,false},
162 { ARM::VLD1d64TPseudoWB_fixed, ARM::VLD1d64Twb_fixed, true, true, false, SingleSpc, 3, 1 ,false},
164 { ARM::VLD2LNd16Pseudo, ARM::VLD2LNd16, true, false, false, SingleSpc, 2, 4 ,true},
165 { ARM::VLD2LNd16Pseudo_UPD, ARM::VLD2LNd16_UPD, true, true, true, SingleSpc, 2, 4 ,true},
166 { ARM::VLD2LNd32Pseudo, ARM::VLD2LNd32, true, false, false, SingleSpc, 2, 2 ,true},
167 { ARM::VLD2LNd32Pseudo_UPD, ARM::VLD2LNd32_UPD, true, true, true, SingleSpc, 2, 2 ,true},
168 { ARM::VLD2LNd8Pseudo, ARM::VLD2LNd8, true, false, false, SingleSpc, 2, 8 ,true},
169 { ARM::VLD2LNd8Pseudo_UPD, ARM::VLD2LNd8_UPD, true, true, true, SingleSpc, 2, 8 ,true},
170 { ARM::VLD2LNq16Pseudo, ARM::VLD2LNq16, true, false, false, EvenDblSpc, 2, 4 ,true},
171 { ARM::VLD2LNq16Pseudo_UPD, ARM::VLD2LNq16_UPD, true, true, true, EvenDblSpc, 2, 4 ,true},
172 { ARM::VLD2LNq32Pseudo, ARM::VLD2LNq32, true, false, false, EvenDblSpc, 2, 2 ,true},
173 { ARM::VLD2LNq32Pseudo_UPD, ARM::VLD2LNq32_UPD, true, true, true, EvenDblSpc, 2, 2 ,true},
175 { ARM::VLD2q16Pseudo, ARM::VLD2q16, true, false, false, SingleSpc, 4, 4 ,false},
176 { ARM::VLD2q16PseudoWB_fixed, ARM::VLD2q16wb_fixed, true, true, false, SingleSpc, 4, 4 ,false},
177 { ARM::VLD2q16PseudoWB_register, ARM::VLD2q16wb_register, true, true, true, SingleSpc, 4, 4 ,false},
178 { ARM::VLD2q32Pseudo, ARM::VLD2q32, true, false, false, SingleSpc, 4, 2 ,false},
179 { ARM::VLD2q32PseudoWB_fixed, ARM::VLD2q32wb_fixed, true, true, false, SingleSpc, 4, 2 ,false},
180 { ARM::VLD2q32PseudoWB_register, ARM::VLD2q32wb_register, true, true, true, SingleSpc, 4, 2 ,false},
181 { ARM::VLD2q8Pseudo, ARM::VLD2q8, true, false, false, SingleSpc, 4, 8 ,false},
182 { ARM::VLD2q8PseudoWB_fixed, ARM::VLD2q8wb_fixed, true, true, false, SingleSpc, 4, 8 ,false},
183 { ARM::VLD2q8PseudoWB_register, ARM::VLD2q8wb_register, true, true, true, SingleSpc, 4, 8 ,false},
185 { ARM::VLD3DUPd16Pseudo, ARM::VLD3DUPd16, true, false, false, SingleSpc, 3, 4,true},
186 { ARM::VLD3DUPd16Pseudo_UPD, ARM::VLD3DUPd16_UPD, true, true, true, SingleSpc, 3, 4,true},
187 { ARM::VLD3DUPd32Pseudo, ARM::VLD3DUPd32, true, false, false, SingleSpc, 3, 2,true},
188 { ARM::VLD3DUPd32Pseudo_UPD, ARM::VLD3DUPd32_UPD, true, true, true, SingleSpc, 3, 2,true},
189 { ARM::VLD3DUPd8Pseudo, ARM::VLD3DUPd8, true, false, false, SingleSpc, 3, 8,true},
190 { ARM::VLD3DUPd8Pseudo_UPD, ARM::VLD3DUPd8_UPD, true, true, true, SingleSpc, 3, 8,true},
192 { ARM::VLD3LNd16Pseudo, ARM::VLD3LNd16, true, false, false, SingleSpc, 3, 4 ,true},
193 { ARM::VLD3LNd16Pseudo_UPD, ARM::VLD3LNd16_UPD, true, true, true, SingleSpc, 3, 4 ,true},
194 { ARM::VLD3LNd32Pseudo, ARM::VLD3LNd32, true, false, false, SingleSpc, 3, 2 ,true},
195 { ARM::VLD3LNd32Pseudo_UPD, ARM::VLD3LNd32_UPD, true, true, true, SingleSpc, 3, 2 ,true},
196 { ARM::VLD3LNd8Pseudo, ARM::VLD3LNd8, true, false, false, SingleSpc, 3, 8 ,true},
197 { ARM::VLD3LNd8Pseudo_UPD, ARM::VLD3LNd8_UPD, true, true, true, SingleSpc, 3, 8 ,true},
198 { ARM::VLD3LNq16Pseudo, ARM::VLD3LNq16, true, false, false, EvenDblSpc, 3, 4 ,true},
199 { ARM::VLD3LNq16Pseudo_UPD, ARM::VLD3LNq16_UPD, true, true, true, EvenDblSpc, 3, 4 ,true},
200 { ARM::VLD3LNq32Pseudo, ARM::VLD3LNq32, true, false, false, EvenDblSpc, 3, 2 ,true},
201 { ARM::VLD3LNq32Pseudo_UPD, ARM::VLD3LNq32_UPD, true, true, true, EvenDblSpc, 3, 2 ,true},
203 { ARM::VLD3d16Pseudo, ARM::VLD3d16, true, false, false, SingleSpc, 3, 4 ,true},
204 { ARM::VLD3d16Pseudo_UPD, ARM::VLD3d16_UPD, true, true, true, SingleSpc, 3, 4 ,true},
205 { ARM::VLD3d32Pseudo, ARM::VLD3d32, true, false, false, SingleSpc, 3, 2 ,true},
206 { ARM::VLD3d32Pseudo_UPD, ARM::VLD3d32_UPD, true, true, true, SingleSpc, 3, 2 ,true},
207 { ARM::VLD3d8Pseudo, ARM::VLD3d8, true, false, false, SingleSpc, 3, 8 ,true},
208 { ARM::VLD3d8Pseudo_UPD, ARM::VLD3d8_UPD, true, true, true, SingleSpc, 3, 8 ,true},
210 { ARM::VLD3q16Pseudo_UPD, ARM::VLD3q16_UPD, true, true, true, EvenDblSpc, 3, 4 ,true},
211 { ARM::VLD3q16oddPseudo, ARM::VLD3q16, true, false, false, OddDblSpc, 3, 4 ,true},
212 { ARM::VLD3q16oddPseudo_UPD, ARM::VLD3q16_UPD, true, true, true, OddDblSpc, 3, 4 ,true},
213 { ARM::VLD3q32Pseudo_UPD, ARM::VLD3q32_UPD, true, true, true, EvenDblSpc, 3, 2 ,true},
214 { ARM::VLD3q32oddPseudo, ARM::VLD3q32, true, false, false, OddDblSpc, 3, 2 ,true},
215 { ARM::VLD3q32oddPseudo_UPD, ARM::VLD3q32_UPD, true, true, true, OddDblSpc, 3, 2 ,true},
216 { ARM::VLD3q8Pseudo_UPD, ARM::VLD3q8_UPD, true, true, true, EvenDblSpc, 3, 8 ,true},
217 { ARM::VLD3q8oddPseudo, ARM::VLD3q8, true, false, false, OddDblSpc, 3, 8 ,true},
218 { ARM::VLD3q8oddPseudo_UPD, ARM::VLD3q8_UPD, true, true, true, OddDblSpc, 3, 8 ,true},
220 { ARM::VLD4DUPd16Pseudo, ARM::VLD4DUPd16, true, false, false, SingleSpc, 4, 4,true},
221 { ARM::VLD4DUPd16Pseudo_UPD, ARM::VLD4DUPd16_UPD, true, true, true, SingleSpc, 4, 4,true},
222 { ARM::VLD4DUPd32Pseudo, ARM::VLD4DUPd32, true, false, false, SingleSpc, 4, 2,true},
223 { ARM::VLD4DUPd32Pseudo_UPD, ARM::VLD4DUPd32_UPD, true, true, true, SingleSpc, 4, 2,true},
224 { ARM::VLD4DUPd8Pseudo, ARM::VLD4DUPd8, true, false, false, SingleSpc, 4, 8,true},
225 { ARM::VLD4DUPd8Pseudo_UPD, ARM::VLD4DUPd8_UPD, true, true, true, SingleSpc, 4, 8,true},
227 { ARM::VLD4LNd16Pseudo, ARM::VLD4LNd16, true, false, false, SingleSpc, 4, 4 ,true},
228 { ARM::VLD4LNd16Pseudo_UPD, ARM::VLD4LNd16_UPD, true, true, true, SingleSpc, 4, 4 ,true},
229 { ARM::VLD4LNd32Pseudo, ARM::VLD4LNd32, true, false, false, SingleSpc, 4, 2 ,true},
230 { ARM::VLD4LNd32Pseudo_UPD, ARM::VLD4LNd32_UPD, true, true, true, SingleSpc, 4, 2 ,true},
231 { ARM::VLD4LNd8Pseudo, ARM::VLD4LNd8, true, false, false, SingleSpc, 4, 8 ,true},
232 { ARM::VLD4LNd8Pseudo_UPD, ARM::VLD4LNd8_UPD, true, true, true, SingleSpc, 4, 8 ,true},
233 { ARM::VLD4LNq16Pseudo, ARM::VLD4LNq16, true, false, false, EvenDblSpc, 4, 4 ,true},
234 { ARM::VLD4LNq16Pseudo_UPD, ARM::VLD4LNq16_UPD, true, true, true, EvenDblSpc, 4, 4 ,true},
235 { ARM::VLD4LNq32Pseudo, ARM::VLD4LNq32, true, false, false, EvenDblSpc, 4, 2 ,true},
236 { ARM::VLD4LNq32Pseudo_UPD, ARM::VLD4LNq32_UPD, true, true, true, EvenDblSpc, 4, 2 ,true},
238 { ARM::VLD4d16Pseudo, ARM::VLD4d16, true, false, false, SingleSpc, 4, 4 ,true},
239 { ARM::VLD4d16Pseudo_UPD, ARM::VLD4d16_UPD, true, true, true, SingleSpc, 4, 4 ,true},
240 { ARM::VLD4d32Pseudo, ARM::VLD4d32, true, false, false, SingleSpc, 4, 2 ,true},
241 { ARM::VLD4d32Pseudo_UPD, ARM::VLD4d32_UPD, true, true, true, SingleSpc, 4, 2 ,true},
242 { ARM::VLD4d8Pseudo, ARM::VLD4d8, true, false, false, SingleSpc, 4, 8 ,true},
243 { ARM::VLD4d8Pseudo_UPD, ARM::VLD4d8_UPD, true, true, true, SingleSpc, 4, 8 ,true},
245 { ARM::VLD4q16Pseudo_UPD, ARM::VLD4q16_UPD, true, true, true, EvenDblSpc, 4, 4 ,true},
246 { ARM::VLD4q16oddPseudo, ARM::VLD4q16, true, false, false, OddDblSpc, 4, 4 ,true},
247 { ARM::VLD4q16oddPseudo_UPD, ARM::VLD4q16_UPD, true, true, true, OddDblSpc, 4, 4 ,true},
248 { ARM::VLD4q32Pseudo_UPD, ARM::VLD4q32_UPD, true, true, true, EvenDblSpc, 4, 2 ,true},
249 { ARM::VLD4q32oddPseudo, ARM::VLD4q32, true, false, false, OddDblSpc, 4, 2 ,true},
250 { ARM::VLD4q32oddPseudo_UPD, ARM::VLD4q32_UPD, true, true, true, OddDblSpc, 4, 2 ,true},
251 { ARM::VLD4q8Pseudo_UPD, ARM::VLD4q8_UPD, true, true, true, EvenDblSpc, 4, 8 ,true},
252 { ARM::VLD4q8oddPseudo, ARM::VLD4q8, true, false, false, OddDblSpc, 4, 8 ,true},
253 { ARM::VLD4q8oddPseudo_UPD, ARM::VLD4q8_UPD, true, true, true, OddDblSpc, 4, 8 ,true},
255 { ARM::VST1LNq16Pseudo, ARM::VST1LNd16, false, false, false, EvenDblSpc, 1, 4 ,true},
256 { ARM::VST1LNq16Pseudo_UPD, ARM::VST1LNd16_UPD, false, true, true, EvenDblSpc, 1, 4 ,true},
257 { ARM::VST1LNq32Pseudo, ARM::VST1LNd32, false, false, false, EvenDblSpc, 1, 2 ,true},
258 { ARM::VST1LNq32Pseudo_UPD, ARM::VST1LNd32_UPD, false, true, true, EvenDblSpc, 1, 2 ,true},
259 { ARM::VST1LNq8Pseudo, ARM::VST1LNd8, false, false, false, EvenDblSpc, 1, 8 ,true},
260 { ARM::VST1LNq8Pseudo_UPD, ARM::VST1LNd8_UPD, false, true, true, EvenDblSpc, 1, 8 ,true},
262 { ARM::VST1d64QPseudo, ARM::VST1d64Q, false, false, false, SingleSpc, 4, 1 ,false},
263 { ARM::VST1d64QPseudoWB_fixed, ARM::VST1d64Qwb_fixed, false, true, false, SingleSpc, 4, 1 ,false},
264 { ARM::VST1d64QPseudoWB_register, ARM::VST1d64Qwb_register, false, true, true, SingleSpc, 4, 1 ,false},
265 { ARM::VST1d64TPseudo, ARM::VST1d64T, false, false, false, SingleSpc, 3, 1 ,false},
266 { ARM::VST1d64TPseudoWB_fixed, ARM::VST1d64Twb_fixed, false, true, false, SingleSpc, 3, 1 ,false},
267 { ARM::VST1d64TPseudoWB_register, ARM::VST1d64Twb_register, false, true, true, SingleSpc, 3, 1 ,false},
269 { ARM::VST2LNd16Pseudo, ARM::VST2LNd16, false, false, false, SingleSpc, 2, 4 ,true},
270 { ARM::VST2LNd16Pseudo_UPD, ARM::VST2LNd16_UPD, false, true, true, SingleSpc, 2, 4 ,true},
271 { ARM::VST2LNd32Pseudo, ARM::VST2LNd32, false, false, false, SingleSpc, 2, 2 ,true},
272 { ARM::VST2LNd32Pseudo_UPD, ARM::VST2LNd32_UPD, false, true, true, SingleSpc, 2, 2 ,true},
273 { ARM::VST2LNd8Pseudo, ARM::VST2LNd8, false, false, false, SingleSpc, 2, 8 ,true},
274 { ARM::VST2LNd8Pseudo_UPD, ARM::VST2LNd8_UPD, false, true, true, SingleSpc, 2, 8 ,true},
275 { ARM::VST2LNq16Pseudo, ARM::VST2LNq16, false, false, false, EvenDblSpc, 2, 4,true},
276 { ARM::VST2LNq16Pseudo_UPD, ARM::VST2LNq16_UPD, false, true, true, EvenDblSpc, 2, 4,true},
277 { ARM::VST2LNq32Pseudo, ARM::VST2LNq32, false, false, false, EvenDblSpc, 2, 2,true},
278 { ARM::VST2LNq32Pseudo_UPD, ARM::VST2LNq32_UPD, false, true, true, EvenDblSpc, 2, 2,true},
280 { ARM::VST2q16Pseudo, ARM::VST2q16, false, false, false, SingleSpc, 4, 4 ,false},
281 { ARM::VST2q16PseudoWB_fixed, ARM::VST2q16wb_fixed, false, true, false, SingleSpc, 4, 4 ,false},
282 { ARM::VST2q16PseudoWB_register, ARM::VST2q16wb_register, false, true, true, SingleSpc, 4, 4 ,false},
283 { ARM::VST2q32Pseudo, ARM::VST2q32, false, false, false, SingleSpc, 4, 2 ,false},
284 { ARM::VST2q32PseudoWB_fixed, ARM::VST2q32wb_fixed, false, true, false, SingleSpc, 4, 2 ,false},
285 { ARM::VST2q32PseudoWB_register, ARM::VST2q32wb_register, false, true, true, SingleSpc, 4, 2 ,false},
286 { ARM::VST2q8Pseudo, ARM::VST2q8, false, false, false, SingleSpc, 4, 8 ,false},
287 { ARM::VST2q8PseudoWB_fixed, ARM::VST2q8wb_fixed, false, true, false, SingleSpc, 4, 8 ,false},
288 { ARM::VST2q8PseudoWB_register, ARM::VST2q8wb_register, false, true, true, SingleSpc, 4, 8 ,false},
290 { ARM::VST3LNd16Pseudo, ARM::VST3LNd16, false, false, false, SingleSpc, 3, 4 ,true},
291 { ARM::VST3LNd16Pseudo_UPD, ARM::VST3LNd16_UPD, false, true, true, SingleSpc, 3, 4 ,true},
292 { ARM::VST3LNd32Pseudo, ARM::VST3LNd32, false, false, false, SingleSpc, 3, 2 ,true},
293 { ARM::VST3LNd32Pseudo_UPD, ARM::VST3LNd32_UPD, false, true, true, SingleSpc, 3, 2 ,true},
294 { ARM::VST3LNd8Pseudo, ARM::VST3LNd8, false, false, false, SingleSpc, 3, 8 ,true},
295 { ARM::VST3LNd8Pseudo_UPD, ARM::VST3LNd8_UPD, false, true, true, SingleSpc, 3, 8 ,true},
296 { ARM::VST3LNq16Pseudo, ARM::VST3LNq16, false, false, false, EvenDblSpc, 3, 4,true},
297 { ARM::VST3LNq16Pseudo_UPD, ARM::VST3LNq16_UPD, false, true, true, EvenDblSpc, 3, 4,true},
298 { ARM::VST3LNq32Pseudo, ARM::VST3LNq32, false, false, false, EvenDblSpc, 3, 2,true},
299 { ARM::VST3LNq32Pseudo_UPD, ARM::VST3LNq32_UPD, false, true, true, EvenDblSpc, 3, 2,true},
301 { ARM::VST3d16Pseudo, ARM::VST3d16, false, false, false, SingleSpc, 3, 4 ,true},
302 { ARM::VST3d16Pseudo_UPD, ARM::VST3d16_UPD, false, true, true, SingleSpc, 3, 4 ,true},
303 { ARM::VST3d32Pseudo, ARM::VST3d32, false, false, false, SingleSpc, 3, 2 ,true},
304 { ARM::VST3d32Pseudo_UPD, ARM::VST3d32_UPD, false, true, true, SingleSpc, 3, 2 ,true},
305 { ARM::VST3d8Pseudo, ARM::VST3d8, false, false, false, SingleSpc, 3, 8 ,true},
306 { ARM::VST3d8Pseudo_UPD, ARM::VST3d8_UPD, false, true, true, SingleSpc, 3, 8 ,true},
308 { ARM::VST3q16Pseudo_UPD, ARM::VST3q16_UPD, false, true, true, EvenDblSpc, 3, 4 ,true},
309 { ARM::VST3q16oddPseudo, ARM::VST3q16, false, false, false, OddDblSpc, 3, 4 ,true},
310 { ARM::VST3q16oddPseudo_UPD, ARM::VST3q16_UPD, false, true, true, OddDblSpc, 3, 4 ,true},
311 { ARM::VST3q32Pseudo_UPD, ARM::VST3q32_UPD, false, true, true, EvenDblSpc, 3, 2 ,true},
312 { ARM::VST3q32oddPseudo, ARM::VST3q32, false, false, false, OddDblSpc, 3, 2 ,true},
313 { ARM::VST3q32oddPseudo_UPD, ARM::VST3q32_UPD, false, true, true, OddDblSpc, 3, 2 ,true},
314 { ARM::VST3q8Pseudo_UPD, ARM::VST3q8_UPD, false, true, true, EvenDblSpc, 3, 8 ,true},
315 { ARM::VST3q8oddPseudo, ARM::VST3q8, false, false, false, OddDblSpc, 3, 8 ,true},
316 { ARM::VST3q8oddPseudo_UPD, ARM::VST3q8_UPD, false, true, true, OddDblSpc, 3, 8 ,true},
318 { ARM::VST4LNd16Pseudo, ARM::VST4LNd16, false, false, false, SingleSpc, 4, 4 ,true},
319 { ARM::VST4LNd16Pseudo_UPD, ARM::VST4LNd16_UPD, false, true, true, SingleSpc, 4, 4 ,true},
320 { ARM::VST4LNd32Pseudo, ARM::VST4LNd32, false, false, false, SingleSpc, 4, 2 ,true},
321 { ARM::VST4LNd32Pseudo_UPD, ARM::VST4LNd32_UPD, false, true, true, SingleSpc, 4, 2 ,true},
322 { ARM::VST4LNd8Pseudo, ARM::VST4LNd8, false, false, false, SingleSpc, 4, 8 ,true},
323 { ARM::VST4LNd8Pseudo_UPD, ARM::VST4LNd8_UPD, false, true, true, SingleSpc, 4, 8 ,true},
324 { ARM::VST4LNq16Pseudo, ARM::VST4LNq16, false, false, false, EvenDblSpc, 4, 4,true},
325 { ARM::VST4LNq16Pseudo_UPD, ARM::VST4LNq16_UPD, false, true, true, EvenDblSpc, 4, 4,true},
326 { ARM::VST4LNq32Pseudo, ARM::VST4LNq32, false, false, false, EvenDblSpc, 4, 2,true},
327 { ARM::VST4LNq32Pseudo_UPD, ARM::VST4LNq32_UPD, false, true, true, EvenDblSpc, 4, 2,true},
329 { ARM::VST4d16Pseudo, ARM::VST4d16, false, false, false, SingleSpc, 4, 4 ,true},
330 { ARM::VST4d16Pseudo_UPD, ARM::VST4d16_UPD, false, true, true, SingleSpc, 4, 4 ,true},
331 { ARM::VST4d32Pseudo, ARM::VST4d32, false, false, false, SingleSpc, 4, 2 ,true},
332 { ARM::VST4d32Pseudo_UPD, ARM::VST4d32_UPD, false, true, true, SingleSpc, 4, 2 ,true},
333 { ARM::VST4d8Pseudo, ARM::VST4d8, false, false, false, SingleSpc, 4, 8 ,true},
334 { ARM::VST4d8Pseudo_UPD, ARM::VST4d8_UPD, false, true, true, SingleSpc, 4, 8 ,true},
336 { ARM::VST4q16Pseudo_UPD, ARM::VST4q16_UPD, false, true, true, EvenDblSpc, 4, 4 ,true},
337 { ARM::VST4q16oddPseudo, ARM::VST4q16, false, false, false, OddDblSpc, 4, 4 ,true},
338 { ARM::VST4q16oddPseudo_UPD, ARM::VST4q16_UPD, false, true, true, OddDblSpc, 4, 4 ,true},
339 { ARM::VST4q32Pseudo_UPD, ARM::VST4q32_UPD, false, true, true, EvenDblSpc, 4, 2 ,true},
340 { ARM::VST4q32oddPseudo, ARM::VST4q32, false, false, false, OddDblSpc, 4, 2 ,true},
341 { ARM::VST4q32oddPseudo_UPD, ARM::VST4q32_UPD, false, true, true, OddDblSpc, 4, 2 ,true},
342 { ARM::VST4q8Pseudo_UPD, ARM::VST4q8_UPD, false, true, true, EvenDblSpc, 4, 8 ,true},
343 { ARM::VST4q8oddPseudo, ARM::VST4q8, false, false, false, OddDblSpc, 4, 8 ,true},
344 { ARM::VST4q8oddPseudo_UPD, ARM::VST4q8_UPD, false, true, true, OddDblSpc, 4, 8 ,true}
347 /// LookupNEONLdSt - Search the NEONLdStTable for information about a NEON
348 /// load or store pseudo instruction.
349 static const NEONLdStTableEntry *LookupNEONLdSt(unsigned Opcode) {
351 // Make sure the table is sorted.
352 static bool TableChecked = false;
354 assert(std::is_sorted(std::begin(NEONLdStTable), std::end(NEONLdStTable)) &&
355 "NEONLdStTable is not sorted!");
360 auto I = std::lower_bound(std::begin(NEONLdStTable),
361 std::end(NEONLdStTable), Opcode);
362 if (I != std::end(NEONLdStTable) && I->PseudoOpc == Opcode)
367 /// GetDSubRegs - Get 4 D subregisters of a Q, QQ, or QQQQ register,
368 /// corresponding to the specified register spacing. Not all of the results
369 /// are necessarily valid, e.g., a Q register only has 2 D subregisters.
370 static void GetDSubRegs(unsigned Reg, NEONRegSpacing RegSpc,
371 const TargetRegisterInfo *TRI, unsigned &D0,
372 unsigned &D1, unsigned &D2, unsigned &D3) {
373 if (RegSpc == SingleSpc) {
374 D0 = TRI->getSubReg(Reg, ARM::dsub_0);
375 D1 = TRI->getSubReg(Reg, ARM::dsub_1);
376 D2 = TRI->getSubReg(Reg, ARM::dsub_2);
377 D3 = TRI->getSubReg(Reg, ARM::dsub_3);
378 } else if (RegSpc == EvenDblSpc) {
379 D0 = TRI->getSubReg(Reg, ARM::dsub_0);
380 D1 = TRI->getSubReg(Reg, ARM::dsub_2);
381 D2 = TRI->getSubReg(Reg, ARM::dsub_4);
382 D3 = TRI->getSubReg(Reg, ARM::dsub_6);
384 assert(RegSpc == OddDblSpc && "unknown register spacing");
385 D0 = TRI->getSubReg(Reg, ARM::dsub_1);
386 D1 = TRI->getSubReg(Reg, ARM::dsub_3);
387 D2 = TRI->getSubReg(Reg, ARM::dsub_5);
388 D3 = TRI->getSubReg(Reg, ARM::dsub_7);
392 /// ExpandVLD - Translate VLD pseudo instructions with Q, QQ or QQQQ register
393 /// operands to real VLD instructions with D register operands.
394 void ARMExpandPseudo::ExpandVLD(MachineBasicBlock::iterator &MBBI) {
395 MachineInstr &MI = *MBBI;
396 MachineBasicBlock &MBB = *MI.getParent();
398 const NEONLdStTableEntry *TableEntry = LookupNEONLdSt(MI.getOpcode());
399 assert(TableEntry && TableEntry->IsLoad && "NEONLdStTable lookup failed");
400 NEONRegSpacing RegSpc = (NEONRegSpacing)TableEntry->RegSpacing;
401 unsigned NumRegs = TableEntry->NumRegs;
403 MachineInstrBuilder MIB = BuildMI(MBB, MBBI, MI.getDebugLoc(),
404 TII->get(TableEntry->RealOpc));
407 bool DstIsDead = MI.getOperand(OpIdx).isDead();
408 unsigned DstReg = MI.getOperand(OpIdx++).getReg();
409 unsigned D0, D1, D2, D3;
410 GetDSubRegs(DstReg, RegSpc, TRI, D0, D1, D2, D3);
411 MIB.addReg(D0, RegState::Define | getDeadRegState(DstIsDead));
412 if (NumRegs > 1 && TableEntry->copyAllListRegs)
413 MIB.addReg(D1, RegState::Define | getDeadRegState(DstIsDead));
414 if (NumRegs > 2 && TableEntry->copyAllListRegs)
415 MIB.addReg(D2, RegState::Define | getDeadRegState(DstIsDead));
416 if (NumRegs > 3 && TableEntry->copyAllListRegs)
417 MIB.addReg(D3, RegState::Define | getDeadRegState(DstIsDead));
419 if (TableEntry->isUpdating)
420 MIB.add(MI.getOperand(OpIdx++));
422 // Copy the addrmode6 operands.
423 MIB.add(MI.getOperand(OpIdx++));
424 MIB.add(MI.getOperand(OpIdx++));
425 // Copy the am6offset operand.
426 if (TableEntry->hasWritebackOperand)
427 MIB.add(MI.getOperand(OpIdx++));
429 // For an instruction writing double-spaced subregs, the pseudo instruction
430 // has an extra operand that is a use of the super-register. Record the
431 // operand index and skip over it.
432 unsigned SrcOpIdx = 0;
433 if (RegSpc == EvenDblSpc || RegSpc == OddDblSpc)
436 // Copy the predicate operands.
437 MIB.add(MI.getOperand(OpIdx++));
438 MIB.add(MI.getOperand(OpIdx++));
440 // Copy the super-register source operand used for double-spaced subregs over
441 // to the new instruction as an implicit operand.
443 MachineOperand MO = MI.getOperand(SrcOpIdx);
444 MO.setImplicit(true);
447 // Add an implicit def for the super-register.
448 MIB.addReg(DstReg, RegState::ImplicitDefine | getDeadRegState(DstIsDead));
449 TransferImpOps(MI, MIB, MIB);
451 // Transfer memoperands.
452 MIB->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
454 MI.eraseFromParent();
457 /// ExpandVST - Translate VST pseudo instructions with Q, QQ or QQQQ register
458 /// operands to real VST instructions with D register operands.
459 void ARMExpandPseudo::ExpandVST(MachineBasicBlock::iterator &MBBI) {
460 MachineInstr &MI = *MBBI;
461 MachineBasicBlock &MBB = *MI.getParent();
463 const NEONLdStTableEntry *TableEntry = LookupNEONLdSt(MI.getOpcode());
464 assert(TableEntry && !TableEntry->IsLoad && "NEONLdStTable lookup failed");
465 NEONRegSpacing RegSpc = (NEONRegSpacing)TableEntry->RegSpacing;
466 unsigned NumRegs = TableEntry->NumRegs;
468 MachineInstrBuilder MIB = BuildMI(MBB, MBBI, MI.getDebugLoc(),
469 TII->get(TableEntry->RealOpc));
471 if (TableEntry->isUpdating)
472 MIB.add(MI.getOperand(OpIdx++));
474 // Copy the addrmode6 operands.
475 MIB.add(MI.getOperand(OpIdx++));
476 MIB.add(MI.getOperand(OpIdx++));
477 // Copy the am6offset operand.
478 if (TableEntry->hasWritebackOperand)
479 MIB.add(MI.getOperand(OpIdx++));
481 bool SrcIsKill = MI.getOperand(OpIdx).isKill();
482 bool SrcIsUndef = MI.getOperand(OpIdx).isUndef();
483 unsigned SrcReg = MI.getOperand(OpIdx++).getReg();
484 unsigned D0, D1, D2, D3;
485 GetDSubRegs(SrcReg, RegSpc, TRI, D0, D1, D2, D3);
486 MIB.addReg(D0, getUndefRegState(SrcIsUndef));
487 if (NumRegs > 1 && TableEntry->copyAllListRegs)
488 MIB.addReg(D1, getUndefRegState(SrcIsUndef));
489 if (NumRegs > 2 && TableEntry->copyAllListRegs)
490 MIB.addReg(D2, getUndefRegState(SrcIsUndef));
491 if (NumRegs > 3 && TableEntry->copyAllListRegs)
492 MIB.addReg(D3, getUndefRegState(SrcIsUndef));
494 // Copy the predicate operands.
495 MIB.add(MI.getOperand(OpIdx++));
496 MIB.add(MI.getOperand(OpIdx++));
498 if (SrcIsKill && !SrcIsUndef) // Add an implicit kill for the super-reg.
499 MIB->addRegisterKilled(SrcReg, TRI, true);
500 else if (!SrcIsUndef)
501 MIB.addReg(SrcReg, RegState::Implicit); // Add implicit uses for src reg.
502 TransferImpOps(MI, MIB, MIB);
504 // Transfer memoperands.
505 MIB->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
507 MI.eraseFromParent();
510 /// ExpandLaneOp - Translate VLD*LN and VST*LN instructions with Q, QQ or QQQQ
511 /// register operands to real instructions with D register operands.
512 void ARMExpandPseudo::ExpandLaneOp(MachineBasicBlock::iterator &MBBI) {
513 MachineInstr &MI = *MBBI;
514 MachineBasicBlock &MBB = *MI.getParent();
516 const NEONLdStTableEntry *TableEntry = LookupNEONLdSt(MI.getOpcode());
517 assert(TableEntry && "NEONLdStTable lookup failed");
518 NEONRegSpacing RegSpc = (NEONRegSpacing)TableEntry->RegSpacing;
519 unsigned NumRegs = TableEntry->NumRegs;
520 unsigned RegElts = TableEntry->RegElts;
522 MachineInstrBuilder MIB = BuildMI(MBB, MBBI, MI.getDebugLoc(),
523 TII->get(TableEntry->RealOpc));
525 // The lane operand is always the 3rd from last operand, before the 2
526 // predicate operands.
527 unsigned Lane = MI.getOperand(MI.getDesc().getNumOperands() - 3).getImm();
529 // Adjust the lane and spacing as needed for Q registers.
530 assert(RegSpc != OddDblSpc && "unexpected register spacing for VLD/VST-lane");
531 if (RegSpc == EvenDblSpc && Lane >= RegElts) {
535 assert(Lane < RegElts && "out of range lane for VLD/VST-lane");
537 unsigned D0 = 0, D1 = 0, D2 = 0, D3 = 0;
539 bool DstIsDead = false;
540 if (TableEntry->IsLoad) {
541 DstIsDead = MI.getOperand(OpIdx).isDead();
542 DstReg = MI.getOperand(OpIdx++).getReg();
543 GetDSubRegs(DstReg, RegSpc, TRI, D0, D1, D2, D3);
544 MIB.addReg(D0, RegState::Define | getDeadRegState(DstIsDead));
546 MIB.addReg(D1, RegState::Define | getDeadRegState(DstIsDead));
548 MIB.addReg(D2, RegState::Define | getDeadRegState(DstIsDead));
550 MIB.addReg(D3, RegState::Define | getDeadRegState(DstIsDead));
553 if (TableEntry->isUpdating)
554 MIB.add(MI.getOperand(OpIdx++));
556 // Copy the addrmode6 operands.
557 MIB.add(MI.getOperand(OpIdx++));
558 MIB.add(MI.getOperand(OpIdx++));
559 // Copy the am6offset operand.
560 if (TableEntry->hasWritebackOperand)
561 MIB.add(MI.getOperand(OpIdx++));
563 // Grab the super-register source.
564 MachineOperand MO = MI.getOperand(OpIdx++);
565 if (!TableEntry->IsLoad)
566 GetDSubRegs(MO.getReg(), RegSpc, TRI, D0, D1, D2, D3);
568 // Add the subregs as sources of the new instruction.
569 unsigned SrcFlags = (getUndefRegState(MO.isUndef()) |
570 getKillRegState(MO.isKill()));
571 MIB.addReg(D0, SrcFlags);
573 MIB.addReg(D1, SrcFlags);
575 MIB.addReg(D2, SrcFlags);
577 MIB.addReg(D3, SrcFlags);
579 // Add the lane number operand.
583 // Copy the predicate operands.
584 MIB.add(MI.getOperand(OpIdx++));
585 MIB.add(MI.getOperand(OpIdx++));
587 // Copy the super-register source to be an implicit source.
588 MO.setImplicit(true);
590 if (TableEntry->IsLoad)
591 // Add an implicit def for the super-register.
592 MIB.addReg(DstReg, RegState::ImplicitDefine | getDeadRegState(DstIsDead));
593 TransferImpOps(MI, MIB, MIB);
594 // Transfer memoperands.
595 MIB->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
596 MI.eraseFromParent();
599 /// ExpandVTBL - Translate VTBL and VTBX pseudo instructions with Q or QQ
600 /// register operands to real instructions with D register operands.
601 void ARMExpandPseudo::ExpandVTBL(MachineBasicBlock::iterator &MBBI,
602 unsigned Opc, bool IsExt) {
603 MachineInstr &MI = *MBBI;
604 MachineBasicBlock &MBB = *MI.getParent();
606 MachineInstrBuilder MIB = BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(Opc));
609 // Transfer the destination register operand.
610 MIB.add(MI.getOperand(OpIdx++));
612 MIB.add(MI.getOperand(OpIdx++));
614 bool SrcIsKill = MI.getOperand(OpIdx).isKill();
615 unsigned SrcReg = MI.getOperand(OpIdx++).getReg();
616 unsigned D0, D1, D2, D3;
617 GetDSubRegs(SrcReg, SingleSpc, TRI, D0, D1, D2, D3);
620 // Copy the other source register operand.
621 MIB.add(MI.getOperand(OpIdx++));
623 // Copy the predicate operands.
624 MIB.add(MI.getOperand(OpIdx++));
625 MIB.add(MI.getOperand(OpIdx++));
627 // Add an implicit kill and use for the super-reg.
628 MIB.addReg(SrcReg, RegState::Implicit | getKillRegState(SrcIsKill));
629 TransferImpOps(MI, MIB, MIB);
630 MI.eraseFromParent();
633 static bool IsAnAddressOperand(const MachineOperand &MO) {
634 // This check is overly conservative. Unless we are certain that the machine
635 // operand is not a symbol reference, we return that it is a symbol reference.
636 // This is important as the load pair may not be split up Windows.
637 switch (MO.getType()) {
638 case MachineOperand::MO_Register:
639 case MachineOperand::MO_Immediate:
640 case MachineOperand::MO_CImmediate:
641 case MachineOperand::MO_FPImmediate:
643 case MachineOperand::MO_MachineBasicBlock:
645 case MachineOperand::MO_FrameIndex:
647 case MachineOperand::MO_ConstantPoolIndex:
648 case MachineOperand::MO_TargetIndex:
649 case MachineOperand::MO_JumpTableIndex:
650 case MachineOperand::MO_ExternalSymbol:
651 case MachineOperand::MO_GlobalAddress:
652 case MachineOperand::MO_BlockAddress:
654 case MachineOperand::MO_RegisterMask:
655 case MachineOperand::MO_RegisterLiveOut:
657 case MachineOperand::MO_Metadata:
658 case MachineOperand::MO_MCSymbol:
660 case MachineOperand::MO_CFIIndex:
662 case MachineOperand::MO_IntrinsicID:
663 case MachineOperand::MO_Predicate:
664 llvm_unreachable("should not exist post-isel");
666 llvm_unreachable("unhandled machine operand type");
669 void ARMExpandPseudo::ExpandMOV32BitImm(MachineBasicBlock &MBB,
670 MachineBasicBlock::iterator &MBBI) {
671 MachineInstr &MI = *MBBI;
672 unsigned Opcode = MI.getOpcode();
673 unsigned PredReg = 0;
674 ARMCC::CondCodes Pred = getInstrPredicate(MI, PredReg);
675 unsigned DstReg = MI.getOperand(0).getReg();
676 bool DstIsDead = MI.getOperand(0).isDead();
677 bool isCC = Opcode == ARM::MOVCCi32imm || Opcode == ARM::t2MOVCCi32imm;
678 const MachineOperand &MO = MI.getOperand(isCC ? 2 : 1);
679 bool RequiresBundling = STI->isTargetWindows() && IsAnAddressOperand(MO);
680 MachineInstrBuilder LO16, HI16;
682 if (!STI->hasV6T2Ops() &&
683 (Opcode == ARM::MOVi32imm || Opcode == ARM::MOVCCi32imm)) {
684 // FIXME Windows CE supports older ARM CPUs
685 assert(!STI->isTargetWindows() && "Windows on ARM requires ARMv7+");
687 // Expand into a movi + orr.
688 LO16 = BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(ARM::MOVi), DstReg);
689 HI16 = BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(ARM::ORRri))
690 .addReg(DstReg, RegState::Define | getDeadRegState(DstIsDead))
693 assert (MO.isImm() && "MOVi32imm w/ non-immediate source operand!");
694 unsigned ImmVal = (unsigned)MO.getImm();
695 unsigned SOImmValV1 = ARM_AM::getSOImmTwoPartFirst(ImmVal);
696 unsigned SOImmValV2 = ARM_AM::getSOImmTwoPartSecond(ImmVal);
697 LO16 = LO16.addImm(SOImmValV1);
698 HI16 = HI16.addImm(SOImmValV2);
699 LO16->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
700 HI16->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
701 LO16.addImm(Pred).addReg(PredReg).add(condCodeOp());
702 HI16.addImm(Pred).addReg(PredReg).add(condCodeOp());
703 TransferImpOps(MI, LO16, HI16);
704 MI.eraseFromParent();
708 unsigned LO16Opc = 0;
709 unsigned HI16Opc = 0;
710 if (Opcode == ARM::t2MOVi32imm || Opcode == ARM::t2MOVCCi32imm) {
711 LO16Opc = ARM::t2MOVi16;
712 HI16Opc = ARM::t2MOVTi16;
714 LO16Opc = ARM::MOVi16;
715 HI16Opc = ARM::MOVTi16;
718 LO16 = BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(LO16Opc), DstReg);
719 HI16 = BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(HI16Opc))
720 .addReg(DstReg, RegState::Define | getDeadRegState(DstIsDead))
723 switch (MO.getType()) {
724 case MachineOperand::MO_Immediate: {
725 unsigned Imm = MO.getImm();
726 unsigned Lo16 = Imm & 0xffff;
727 unsigned Hi16 = (Imm >> 16) & 0xffff;
728 LO16 = LO16.addImm(Lo16);
729 HI16 = HI16.addImm(Hi16);
732 case MachineOperand::MO_ExternalSymbol: {
733 const char *ES = MO.getSymbolName();
734 unsigned TF = MO.getTargetFlags();
735 LO16 = LO16.addExternalSymbol(ES, TF | ARMII::MO_LO16);
736 HI16 = HI16.addExternalSymbol(ES, TF | ARMII::MO_HI16);
740 const GlobalValue *GV = MO.getGlobal();
741 unsigned TF = MO.getTargetFlags();
742 LO16 = LO16.addGlobalAddress(GV, MO.getOffset(), TF | ARMII::MO_LO16);
743 HI16 = HI16.addGlobalAddress(GV, MO.getOffset(), TF | ARMII::MO_HI16);
748 LO16->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
749 HI16->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
750 LO16.addImm(Pred).addReg(PredReg);
751 HI16.addImm(Pred).addReg(PredReg);
753 if (RequiresBundling)
754 finalizeBundle(MBB, LO16->getIterator(), MBBI->getIterator());
756 TransferImpOps(MI, LO16, HI16);
757 MI.eraseFromParent();
760 /// Expand a CMP_SWAP pseudo-inst to an ldrex/strex loop as simply as
761 /// possible. This only gets used at -O0 so we don't care about efficiency of
762 /// the generated code.
763 bool ARMExpandPseudo::ExpandCMP_SWAP(MachineBasicBlock &MBB,
764 MachineBasicBlock::iterator MBBI,
765 unsigned LdrexOp, unsigned StrexOp,
767 MachineBasicBlock::iterator &NextMBBI) {
768 bool IsThumb = STI->isThumb();
769 MachineInstr &MI = *MBBI;
770 DebugLoc DL = MI.getDebugLoc();
771 const MachineOperand &Dest = MI.getOperand(0);
772 unsigned StatusReg = MI.getOperand(1).getReg();
773 bool StatusDead = MI.getOperand(1).isDead();
774 // Duplicating undef operands into 2 instructions does not guarantee the same
775 // value on both; However undef should be replaced by xzr anyway.
776 assert(!MI.getOperand(2).isUndef() && "cannot handle undef");
777 unsigned AddrReg = MI.getOperand(2).getReg();
778 unsigned DesiredReg = MI.getOperand(3).getReg();
779 unsigned NewReg = MI.getOperand(4).getReg();
781 MachineFunction *MF = MBB.getParent();
782 auto LoadCmpBB = MF->CreateMachineBasicBlock(MBB.getBasicBlock());
783 auto StoreBB = MF->CreateMachineBasicBlock(MBB.getBasicBlock());
784 auto DoneBB = MF->CreateMachineBasicBlock(MBB.getBasicBlock());
786 MF->insert(++MBB.getIterator(), LoadCmpBB);
787 MF->insert(++LoadCmpBB->getIterator(), StoreBB);
788 MF->insert(++StoreBB->getIterator(), DoneBB);
791 MachineInstrBuilder MIB =
792 BuildMI(MBB, MBBI, DL, TII->get(UxtOp), DesiredReg)
793 .addReg(DesiredReg, RegState::Kill);
796 MIB.add(predOps(ARMCC::AL));
801 // ldrex rDest, [rAddr]
802 // cmp rDest, rDesired
806 BuildMI(LoadCmpBB, DL, TII->get(ARM::tMOVi8), StatusReg)
807 .addDef(ARM::CPSR, RegState::Dead)
809 .add(predOps(ARMCC::AL));
811 BuildMI(LoadCmpBB, DL, TII->get(ARM::MOVi), StatusReg)
813 .add(predOps(ARMCC::AL))
818 MachineInstrBuilder MIB;
819 MIB = BuildMI(LoadCmpBB, DL, TII->get(LdrexOp), Dest.getReg());
821 if (LdrexOp == ARM::t2LDREX)
822 MIB.addImm(0); // a 32-bit Thumb ldrex (only) allows an offset.
823 MIB.add(predOps(ARMCC::AL));
825 unsigned CMPrr = IsThumb ? ARM::tCMPhir : ARM::CMPrr;
826 BuildMI(LoadCmpBB, DL, TII->get(CMPrr))
827 .addReg(Dest.getReg(), getKillRegState(Dest.isDead()))
829 .add(predOps(ARMCC::AL));
830 unsigned Bcc = IsThumb ? ARM::tBcc : ARM::Bcc;
831 BuildMI(LoadCmpBB, DL, TII->get(Bcc))
834 .addReg(ARM::CPSR, RegState::Kill);
835 LoadCmpBB->addSuccessor(DoneBB);
836 LoadCmpBB->addSuccessor(StoreBB);
839 // strex rStatus, rNew, [rAddr]
842 MIB = BuildMI(StoreBB, DL, TII->get(StrexOp), StatusReg)
845 if (StrexOp == ARM::t2STREX)
846 MIB.addImm(0); // a 32-bit Thumb strex (only) allows an offset.
847 MIB.add(predOps(ARMCC::AL));
849 unsigned CMPri = IsThumb ? ARM::t2CMPri : ARM::CMPri;
850 BuildMI(StoreBB, DL, TII->get(CMPri))
851 .addReg(StatusReg, getKillRegState(StatusDead))
853 .add(predOps(ARMCC::AL));
854 BuildMI(StoreBB, DL, TII->get(Bcc))
857 .addReg(ARM::CPSR, RegState::Kill);
858 StoreBB->addSuccessor(LoadCmpBB);
859 StoreBB->addSuccessor(DoneBB);
861 DoneBB->splice(DoneBB->end(), &MBB, MI, MBB.end());
862 DoneBB->transferSuccessors(&MBB);
864 MBB.addSuccessor(LoadCmpBB);
866 NextMBBI = MBB.end();
867 MI.eraseFromParent();
869 // Recompute livein lists.
870 const MachineRegisterInfo &MRI = MBB.getParent()->getRegInfo();
871 LivePhysRegs LiveRegs;
872 computeLiveIns(LiveRegs, MRI, *DoneBB);
873 computeLiveIns(LiveRegs, MRI, *StoreBB);
874 computeLiveIns(LiveRegs, MRI, *LoadCmpBB);
875 // Do an extra pass around the loop to get loop carried registers right.
876 StoreBB->clearLiveIns();
877 computeLiveIns(LiveRegs, MRI, *StoreBB);
878 LoadCmpBB->clearLiveIns();
879 computeLiveIns(LiveRegs, MRI, *LoadCmpBB);
884 /// ARM's ldrexd/strexd take a consecutive register pair (represented as a
885 /// single GPRPair register), Thumb's take two separate registers so we need to
886 /// extract the subregs from the pair.
887 static void addExclusiveRegPair(MachineInstrBuilder &MIB, MachineOperand &Reg,
888 unsigned Flags, bool IsThumb,
889 const TargetRegisterInfo *TRI) {
891 unsigned RegLo = TRI->getSubReg(Reg.getReg(), ARM::gsub_0);
892 unsigned RegHi = TRI->getSubReg(Reg.getReg(), ARM::gsub_1);
893 MIB.addReg(RegLo, Flags | getKillRegState(Reg.isDead()));
894 MIB.addReg(RegHi, Flags | getKillRegState(Reg.isDead()));
896 MIB.addReg(Reg.getReg(), Flags | getKillRegState(Reg.isDead()));
899 /// Expand a 64-bit CMP_SWAP to an ldrexd/strexd loop.
900 bool ARMExpandPseudo::ExpandCMP_SWAP_64(MachineBasicBlock &MBB,
901 MachineBasicBlock::iterator MBBI,
902 MachineBasicBlock::iterator &NextMBBI) {
903 bool IsThumb = STI->isThumb();
904 MachineInstr &MI = *MBBI;
905 DebugLoc DL = MI.getDebugLoc();
906 MachineOperand &Dest = MI.getOperand(0);
907 unsigned StatusReg = MI.getOperand(1).getReg();
908 bool StatusDead = MI.getOperand(1).isDead();
909 // Duplicating undef operands into 2 instructions does not guarantee the same
910 // value on both; However undef should be replaced by xzr anyway.
911 assert(!MI.getOperand(2).isUndef() && "cannot handle undef");
912 unsigned AddrReg = MI.getOperand(2).getReg();
913 unsigned DesiredReg = MI.getOperand(3).getReg();
914 MachineOperand New = MI.getOperand(4);
915 New.setIsKill(false);
917 unsigned DestLo = TRI->getSubReg(Dest.getReg(), ARM::gsub_0);
918 unsigned DestHi = TRI->getSubReg(Dest.getReg(), ARM::gsub_1);
919 unsigned DesiredLo = TRI->getSubReg(DesiredReg, ARM::gsub_0);
920 unsigned DesiredHi = TRI->getSubReg(DesiredReg, ARM::gsub_1);
922 MachineFunction *MF = MBB.getParent();
923 auto LoadCmpBB = MF->CreateMachineBasicBlock(MBB.getBasicBlock());
924 auto StoreBB = MF->CreateMachineBasicBlock(MBB.getBasicBlock());
925 auto DoneBB = MF->CreateMachineBasicBlock(MBB.getBasicBlock());
927 MF->insert(++MBB.getIterator(), LoadCmpBB);
928 MF->insert(++LoadCmpBB->getIterator(), StoreBB);
929 MF->insert(++StoreBB->getIterator(), DoneBB);
932 // ldrexd rDestLo, rDestHi, [rAddr]
933 // cmp rDestLo, rDesiredLo
934 // sbcs rStatus<dead>, rDestHi, rDesiredHi
936 unsigned LDREXD = IsThumb ? ARM::t2LDREXD : ARM::LDREXD;
937 MachineInstrBuilder MIB;
938 MIB = BuildMI(LoadCmpBB, DL, TII->get(LDREXD));
939 addExclusiveRegPair(MIB, Dest, RegState::Define, IsThumb, TRI);
940 MIB.addReg(AddrReg).add(predOps(ARMCC::AL));
942 unsigned CMPrr = IsThumb ? ARM::tCMPhir : ARM::CMPrr;
943 BuildMI(LoadCmpBB, DL, TII->get(CMPrr))
944 .addReg(DestLo, getKillRegState(Dest.isDead()))
946 .add(predOps(ARMCC::AL));
948 BuildMI(LoadCmpBB, DL, TII->get(CMPrr))
949 .addReg(DestHi, getKillRegState(Dest.isDead()))
951 .addImm(ARMCC::EQ).addReg(ARM::CPSR, RegState::Kill);
953 unsigned Bcc = IsThumb ? ARM::tBcc : ARM::Bcc;
954 BuildMI(LoadCmpBB, DL, TII->get(Bcc))
957 .addReg(ARM::CPSR, RegState::Kill);
958 LoadCmpBB->addSuccessor(DoneBB);
959 LoadCmpBB->addSuccessor(StoreBB);
962 // strexd rStatus, rNewLo, rNewHi, [rAddr]
965 unsigned STREXD = IsThumb ? ARM::t2STREXD : ARM::STREXD;
966 MIB = BuildMI(StoreBB, DL, TII->get(STREXD), StatusReg);
967 addExclusiveRegPair(MIB, New, 0, IsThumb, TRI);
968 MIB.addReg(AddrReg).add(predOps(ARMCC::AL));
970 unsigned CMPri = IsThumb ? ARM::t2CMPri : ARM::CMPri;
971 BuildMI(StoreBB, DL, TII->get(CMPri))
972 .addReg(StatusReg, getKillRegState(StatusDead))
974 .add(predOps(ARMCC::AL));
975 BuildMI(StoreBB, DL, TII->get(Bcc))
978 .addReg(ARM::CPSR, RegState::Kill);
979 StoreBB->addSuccessor(LoadCmpBB);
980 StoreBB->addSuccessor(DoneBB);
982 DoneBB->splice(DoneBB->end(), &MBB, MI, MBB.end());
983 DoneBB->transferSuccessors(&MBB);
985 MBB.addSuccessor(LoadCmpBB);
987 NextMBBI = MBB.end();
988 MI.eraseFromParent();
990 // Recompute livein lists.
991 const MachineRegisterInfo &MRI = MBB.getParent()->getRegInfo();
992 LivePhysRegs LiveRegs;
993 computeLiveIns(LiveRegs, MRI, *DoneBB);
994 computeLiveIns(LiveRegs, MRI, *StoreBB);
995 computeLiveIns(LiveRegs, MRI, *LoadCmpBB);
996 // Do an extra pass around the loop to get loop carried registers right.
997 StoreBB->clearLiveIns();
998 computeLiveIns(LiveRegs, MRI, *StoreBB);
999 LoadCmpBB->clearLiveIns();
1000 computeLiveIns(LiveRegs, MRI, *LoadCmpBB);
1006 bool ARMExpandPseudo::ExpandMI(MachineBasicBlock &MBB,
1007 MachineBasicBlock::iterator MBBI,
1008 MachineBasicBlock::iterator &NextMBBI) {
1009 MachineInstr &MI = *MBBI;
1010 unsigned Opcode = MI.getOpcode();
1015 case ARM::TCRETURNdi:
1016 case ARM::TCRETURNri: {
1017 MachineBasicBlock::iterator MBBI = MBB.getLastNonDebugInstr();
1018 assert(MBBI->isReturn() &&
1019 "Can only insert epilog into returning blocks");
1020 unsigned RetOpcode = MBBI->getOpcode();
1021 DebugLoc dl = MBBI->getDebugLoc();
1022 const ARMBaseInstrInfo &TII = *static_cast<const ARMBaseInstrInfo *>(
1023 MBB.getParent()->getSubtarget().getInstrInfo());
1025 // Tail call return: adjust the stack pointer and jump to callee.
1026 MBBI = MBB.getLastNonDebugInstr();
1027 MachineOperand &JumpTarget = MBBI->getOperand(0);
1029 // Jump to label or value in register.
1030 if (RetOpcode == ARM::TCRETURNdi) {
1033 ? (STI->isTargetMachO() ? ARM::tTAILJMPd : ARM::tTAILJMPdND)
1035 MachineInstrBuilder MIB = BuildMI(MBB, MBBI, dl, TII.get(TCOpcode));
1036 if (JumpTarget.isGlobal())
1037 MIB.addGlobalAddress(JumpTarget.getGlobal(), JumpTarget.getOffset(),
1038 JumpTarget.getTargetFlags());
1040 assert(JumpTarget.isSymbol());
1041 MIB.addExternalSymbol(JumpTarget.getSymbolName(),
1042 JumpTarget.getTargetFlags());
1045 // Add the default predicate in Thumb mode.
1047 MIB.add(predOps(ARMCC::AL));
1048 } else if (RetOpcode == ARM::TCRETURNri) {
1049 BuildMI(MBB, MBBI, dl,
1050 TII.get(STI->isThumb() ? ARM::tTAILJMPr : ARM::TAILJMPr))
1051 .addReg(JumpTarget.getReg(), RegState::Kill);
1054 auto NewMI = std::prev(MBBI);
1055 for (unsigned i = 1, e = MBBI->getNumOperands(); i != e; ++i)
1056 NewMI->addOperand(MBBI->getOperand(i));
1058 // Delete the pseudo instruction TCRETURN.
1064 case ARM::VMOVDcc: {
1065 unsigned newOpc = Opcode == ARM::VMOVScc ? ARM::VMOVS : ARM::VMOVD;
1066 BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(newOpc),
1067 MI.getOperand(1).getReg())
1068 .add(MI.getOperand(2))
1069 .addImm(MI.getOperand(3).getImm()) // 'pred'
1070 .add(MI.getOperand(4));
1072 MI.eraseFromParent();
1077 unsigned Opc = AFI->isThumbFunction() ? ARM::t2MOVr : ARM::MOVr;
1078 BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(Opc),
1079 MI.getOperand(1).getReg())
1080 .add(MI.getOperand(2))
1081 .addImm(MI.getOperand(3).getImm()) // 'pred'
1082 .add(MI.getOperand(4))
1083 .add(condCodeOp()); // 's' bit
1085 MI.eraseFromParent();
1088 case ARM::MOVCCsi: {
1089 BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(ARM::MOVsi),
1090 (MI.getOperand(1).getReg()))
1091 .add(MI.getOperand(2))
1092 .addImm(MI.getOperand(3).getImm())
1093 .addImm(MI.getOperand(4).getImm()) // 'pred'
1094 .add(MI.getOperand(5))
1095 .add(condCodeOp()); // 's' bit
1097 MI.eraseFromParent();
1100 case ARM::MOVCCsr: {
1101 BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(ARM::MOVsr),
1102 (MI.getOperand(1).getReg()))
1103 .add(MI.getOperand(2))
1104 .add(MI.getOperand(3))
1105 .addImm(MI.getOperand(4).getImm())
1106 .addImm(MI.getOperand(5).getImm()) // 'pred'
1107 .add(MI.getOperand(6))
1108 .add(condCodeOp()); // 's' bit
1110 MI.eraseFromParent();
1113 case ARM::t2MOVCCi16:
1114 case ARM::MOVCCi16: {
1115 unsigned NewOpc = AFI->isThumbFunction() ? ARM::t2MOVi16 : ARM::MOVi16;
1116 BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(NewOpc),
1117 MI.getOperand(1).getReg())
1118 .addImm(MI.getOperand(2).getImm())
1119 .addImm(MI.getOperand(3).getImm()) // 'pred'
1120 .add(MI.getOperand(4));
1121 MI.eraseFromParent();
1126 unsigned Opc = AFI->isThumbFunction() ? ARM::t2MOVi : ARM::MOVi;
1127 BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(Opc),
1128 MI.getOperand(1).getReg())
1129 .addImm(MI.getOperand(2).getImm())
1130 .addImm(MI.getOperand(3).getImm()) // 'pred'
1131 .add(MI.getOperand(4))
1132 .add(condCodeOp()); // 's' bit
1134 MI.eraseFromParent();
1139 unsigned Opc = AFI->isThumbFunction() ? ARM::t2MVNi : ARM::MVNi;
1140 BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(Opc),
1141 MI.getOperand(1).getReg())
1142 .addImm(MI.getOperand(2).getImm())
1143 .addImm(MI.getOperand(3).getImm()) // 'pred'
1144 .add(MI.getOperand(4))
1145 .add(condCodeOp()); // 's' bit
1147 MI.eraseFromParent();
1150 case ARM::t2MOVCClsl:
1151 case ARM::t2MOVCClsr:
1152 case ARM::t2MOVCCasr:
1153 case ARM::t2MOVCCror: {
1156 case ARM::t2MOVCClsl: NewOpc = ARM::t2LSLri; break;
1157 case ARM::t2MOVCClsr: NewOpc = ARM::t2LSRri; break;
1158 case ARM::t2MOVCCasr: NewOpc = ARM::t2ASRri; break;
1159 case ARM::t2MOVCCror: NewOpc = ARM::t2RORri; break;
1160 default: llvm_unreachable("unexpeced conditional move");
1162 BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(NewOpc),
1163 MI.getOperand(1).getReg())
1164 .add(MI.getOperand(2))
1165 .addImm(MI.getOperand(3).getImm())
1166 .addImm(MI.getOperand(4).getImm()) // 'pred'
1167 .add(MI.getOperand(5))
1168 .add(condCodeOp()); // 's' bit
1169 MI.eraseFromParent();
1172 case ARM::Int_eh_sjlj_dispatchsetup: {
1173 MachineFunction &MF = *MI.getParent()->getParent();
1174 const ARMBaseInstrInfo *AII =
1175 static_cast<const ARMBaseInstrInfo*>(TII);
1176 const ARMBaseRegisterInfo &RI = AII->getRegisterInfo();
1177 // For functions using a base pointer, we rematerialize it (via the frame
1178 // pointer) here since eh.sjlj.setjmp and eh.sjlj.longjmp don't do it
1179 // for us. Otherwise, expand to nothing.
1180 if (RI.hasBasePointer(MF)) {
1181 int32_t NumBytes = AFI->getFramePtrSpillOffset();
1182 unsigned FramePtr = RI.getFrameRegister(MF);
1183 assert(MF.getSubtarget().getFrameLowering()->hasFP(MF) &&
1184 "base pointer without frame pointer?");
1186 if (AFI->isThumb2Function()) {
1187 emitT2RegPlusImmediate(MBB, MBBI, MI.getDebugLoc(), ARM::R6,
1188 FramePtr, -NumBytes, ARMCC::AL, 0, *TII);
1189 } else if (AFI->isThumbFunction()) {
1190 emitThumbRegPlusImmediate(MBB, MBBI, MI.getDebugLoc(), ARM::R6,
1191 FramePtr, -NumBytes, *TII, RI);
1193 emitARMRegPlusImmediate(MBB, MBBI, MI.getDebugLoc(), ARM::R6,
1194 FramePtr, -NumBytes, ARMCC::AL, 0,
1197 // If there's dynamic realignment, adjust for it.
1198 if (RI.needsStackRealignment(MF)) {
1199 MachineFrameInfo &MFI = MF.getFrameInfo();
1200 unsigned MaxAlign = MFI.getMaxAlignment();
1201 assert (!AFI->isThumb1OnlyFunction());
1202 // Emit bic r6, r6, MaxAlign
1203 assert(MaxAlign <= 256 && "The BIC instruction cannot encode "
1204 "immediates larger than 256 with all lower "
1206 unsigned bicOpc = AFI->isThumbFunction() ?
1207 ARM::t2BICri : ARM::BICri;
1208 BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(bicOpc), ARM::R6)
1209 .addReg(ARM::R6, RegState::Kill)
1210 .addImm(MaxAlign - 1)
1211 .add(predOps(ARMCC::AL))
1216 MI.eraseFromParent();
1220 case ARM::MOVsrl_flag:
1221 case ARM::MOVsra_flag: {
1222 // These are just fancy MOVs instructions.
1223 BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(ARM::MOVsi),
1224 MI.getOperand(0).getReg())
1225 .add(MI.getOperand(1))
1226 .addImm(ARM_AM::getSORegOpc(
1227 (Opcode == ARM::MOVsrl_flag ? ARM_AM::lsr : ARM_AM::asr), 1))
1228 .add(predOps(ARMCC::AL))
1229 .addReg(ARM::CPSR, RegState::Define);
1230 MI.eraseFromParent();
1234 // This encodes as "MOVs Rd, Rm, rrx
1235 MachineInstrBuilder MIB =
1236 BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(ARM::MOVsi),
1237 MI.getOperand(0).getReg())
1238 .add(MI.getOperand(1))
1239 .addImm(ARM_AM::getSORegOpc(ARM_AM::rrx, 0))
1240 .add(predOps(ARMCC::AL))
1242 TransferImpOps(MI, MIB, MIB);
1243 MI.eraseFromParent();
1248 const bool Thumb = Opcode == ARM::tTPsoft;
1250 MachineInstrBuilder MIB;
1251 if (STI->genLongCalls()) {
1252 MachineFunction *MF = MBB.getParent();
1253 MachineConstantPool *MCP = MF->getConstantPool();
1254 unsigned PCLabelID = AFI->createPICLabelUId();
1255 MachineConstantPoolValue *CPV =
1256 ARMConstantPoolSymbol::Create(MF->getFunction()->getContext(),
1257 "__aeabi_read_tp", PCLabelID, 0);
1258 unsigned Reg = MI.getOperand(0).getReg();
1259 MIB = BuildMI(MBB, MBBI, MI.getDebugLoc(),
1260 TII->get(Thumb ? ARM::tLDRpci : ARM::LDRi12), Reg)
1261 .addConstantPoolIndex(MCP->getConstantPoolIndex(CPV, 4));
1264 MIB.add(predOps(ARMCC::AL));
1266 MIB = BuildMI(MBB, MBBI, MI.getDebugLoc(),
1267 TII->get(Thumb ? ARM::tBLXr : ARM::BLX));
1269 MIB.add(predOps(ARMCC::AL));
1270 MIB.addReg(Reg, RegState::Kill);
1272 MIB = BuildMI(MBB, MBBI, MI.getDebugLoc(),
1273 TII->get(Thumb ? ARM::tBL : ARM::BL));
1275 MIB.add(predOps(ARMCC::AL));
1276 MIB.addExternalSymbol("__aeabi_read_tp", 0);
1279 MIB->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
1280 TransferImpOps(MI, MIB, MIB);
1281 MI.eraseFromParent();
1284 case ARM::tLDRpci_pic:
1285 case ARM::t2LDRpci_pic: {
1286 unsigned NewLdOpc = (Opcode == ARM::tLDRpci_pic)
1287 ? ARM::tLDRpci : ARM::t2LDRpci;
1288 unsigned DstReg = MI.getOperand(0).getReg();
1289 bool DstIsDead = MI.getOperand(0).isDead();
1290 MachineInstrBuilder MIB1 =
1291 BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(NewLdOpc), DstReg)
1292 .add(MI.getOperand(1))
1293 .add(predOps(ARMCC::AL));
1294 MIB1->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
1295 MachineInstrBuilder MIB2 =
1296 BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(ARM::tPICADD))
1297 .addReg(DstReg, RegState::Define | getDeadRegState(DstIsDead))
1299 .add(MI.getOperand(2));
1300 TransferImpOps(MI, MIB1, MIB2);
1301 MI.eraseFromParent();
1305 case ARM::LDRLIT_ga_abs:
1306 case ARM::LDRLIT_ga_pcrel:
1307 case ARM::LDRLIT_ga_pcrel_ldr:
1308 case ARM::tLDRLIT_ga_abs:
1309 case ARM::tLDRLIT_ga_pcrel: {
1310 unsigned DstReg = MI.getOperand(0).getReg();
1311 bool DstIsDead = MI.getOperand(0).isDead();
1312 const MachineOperand &MO1 = MI.getOperand(1);
1313 const GlobalValue *GV = MO1.getGlobal();
1315 Opcode != ARM::tLDRLIT_ga_pcrel && Opcode != ARM::tLDRLIT_ga_abs;
1317 Opcode != ARM::LDRLIT_ga_abs && Opcode != ARM::tLDRLIT_ga_abs;
1318 unsigned LDRLITOpc = IsARM ? ARM::LDRi12 : ARM::tLDRpci;
1319 unsigned PICAddOpc =
1321 ? (Opcode == ARM::LDRLIT_ga_pcrel_ldr ? ARM::PICLDR : ARM::PICADD)
1324 // We need a new const-pool entry to load from.
1325 MachineConstantPool *MCP = MBB.getParent()->getConstantPool();
1326 unsigned ARMPCLabelIndex = 0;
1327 MachineConstantPoolValue *CPV;
1330 unsigned PCAdj = IsARM ? 8 : 4;
1331 ARMPCLabelIndex = AFI->createPICLabelUId();
1332 CPV = ARMConstantPoolConstant::Create(GV, ARMPCLabelIndex,
1333 ARMCP::CPValue, PCAdj);
1335 CPV = ARMConstantPoolConstant::Create(GV, ARMCP::no_modifier);
1337 MachineInstrBuilder MIB =
1338 BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(LDRLITOpc), DstReg)
1339 .addConstantPoolIndex(MCP->getConstantPoolIndex(CPV, 4));
1342 MIB.add(predOps(ARMCC::AL));
1345 MachineInstrBuilder MIB =
1346 BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(PICAddOpc))
1347 .addReg(DstReg, RegState::Define | getDeadRegState(DstIsDead))
1349 .addImm(ARMPCLabelIndex);
1352 MIB.add(predOps(ARMCC::AL));
1355 MI.eraseFromParent();
1358 case ARM::MOV_ga_pcrel:
1359 case ARM::MOV_ga_pcrel_ldr:
1360 case ARM::t2MOV_ga_pcrel: {
1361 // Expand into movw + movw. Also "add pc" / ldr [pc] in PIC mode.
1362 unsigned LabelId = AFI->createPICLabelUId();
1363 unsigned DstReg = MI.getOperand(0).getReg();
1364 bool DstIsDead = MI.getOperand(0).isDead();
1365 const MachineOperand &MO1 = MI.getOperand(1);
1366 const GlobalValue *GV = MO1.getGlobal();
1367 unsigned TF = MO1.getTargetFlags();
1368 bool isARM = Opcode != ARM::t2MOV_ga_pcrel;
1369 unsigned LO16Opc = isARM ? ARM::MOVi16_ga_pcrel : ARM::t2MOVi16_ga_pcrel;
1370 unsigned HI16Opc = isARM ? ARM::MOVTi16_ga_pcrel :ARM::t2MOVTi16_ga_pcrel;
1371 unsigned LO16TF = TF | ARMII::MO_LO16;
1372 unsigned HI16TF = TF | ARMII::MO_HI16;
1373 unsigned PICAddOpc = isARM
1374 ? (Opcode == ARM::MOV_ga_pcrel_ldr ? ARM::PICLDR : ARM::PICADD)
1376 MachineInstrBuilder MIB1 = BuildMI(MBB, MBBI, MI.getDebugLoc(),
1377 TII->get(LO16Opc), DstReg)
1378 .addGlobalAddress(GV, MO1.getOffset(), TF | LO16TF)
1381 BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(HI16Opc), DstReg)
1383 .addGlobalAddress(GV, MO1.getOffset(), TF | HI16TF)
1386 MachineInstrBuilder MIB3 = BuildMI(MBB, MBBI, MI.getDebugLoc(),
1387 TII->get(PICAddOpc))
1388 .addReg(DstReg, RegState::Define | getDeadRegState(DstIsDead))
1389 .addReg(DstReg).addImm(LabelId);
1391 MIB3.add(predOps(ARMCC::AL));
1392 if (Opcode == ARM::MOV_ga_pcrel_ldr)
1393 MIB3->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
1395 TransferImpOps(MI, MIB1, MIB3);
1396 MI.eraseFromParent();
1400 case ARM::MOVi32imm:
1401 case ARM::MOVCCi32imm:
1402 case ARM::t2MOVi32imm:
1403 case ARM::t2MOVCCi32imm:
1404 ExpandMOV32BitImm(MBB, MBBI);
1407 case ARM::SUBS_PC_LR: {
1408 MachineInstrBuilder MIB =
1409 BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(ARM::SUBri), ARM::PC)
1411 .add(MI.getOperand(0))
1412 .add(MI.getOperand(1))
1413 .add(MI.getOperand(2))
1414 .addReg(ARM::CPSR, RegState::Undef);
1415 TransferImpOps(MI, MIB, MIB);
1416 MI.eraseFromParent();
1419 case ARM::VLDMQIA: {
1420 unsigned NewOpc = ARM::VLDMDIA;
1421 MachineInstrBuilder MIB =
1422 BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(NewOpc));
1425 // Grab the Q register destination.
1426 bool DstIsDead = MI.getOperand(OpIdx).isDead();
1427 unsigned DstReg = MI.getOperand(OpIdx++).getReg();
1429 // Copy the source register.
1430 MIB.add(MI.getOperand(OpIdx++));
1432 // Copy the predicate operands.
1433 MIB.add(MI.getOperand(OpIdx++));
1434 MIB.add(MI.getOperand(OpIdx++));
1436 // Add the destination operands (D subregs).
1437 unsigned D0 = TRI->getSubReg(DstReg, ARM::dsub_0);
1438 unsigned D1 = TRI->getSubReg(DstReg, ARM::dsub_1);
1439 MIB.addReg(D0, RegState::Define | getDeadRegState(DstIsDead))
1440 .addReg(D1, RegState::Define | getDeadRegState(DstIsDead));
1442 // Add an implicit def for the super-register.
1443 MIB.addReg(DstReg, RegState::ImplicitDefine | getDeadRegState(DstIsDead));
1444 TransferImpOps(MI, MIB, MIB);
1445 MIB.setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
1446 MI.eraseFromParent();
1450 case ARM::VSTMQIA: {
1451 unsigned NewOpc = ARM::VSTMDIA;
1452 MachineInstrBuilder MIB =
1453 BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(NewOpc));
1456 // Grab the Q register source.
1457 bool SrcIsKill = MI.getOperand(OpIdx).isKill();
1458 unsigned SrcReg = MI.getOperand(OpIdx++).getReg();
1460 // Copy the destination register.
1461 MIB.add(MI.getOperand(OpIdx++));
1463 // Copy the predicate operands.
1464 MIB.add(MI.getOperand(OpIdx++));
1465 MIB.add(MI.getOperand(OpIdx++));
1467 // Add the source operands (D subregs).
1468 unsigned D0 = TRI->getSubReg(SrcReg, ARM::dsub_0);
1469 unsigned D1 = TRI->getSubReg(SrcReg, ARM::dsub_1);
1470 MIB.addReg(D0, SrcIsKill ? RegState::Kill : 0)
1471 .addReg(D1, SrcIsKill ? RegState::Kill : 0);
1473 if (SrcIsKill) // Add an implicit kill for the Q register.
1474 MIB->addRegisterKilled(SrcReg, TRI, true);
1476 TransferImpOps(MI, MIB, MIB);
1477 MIB.setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
1478 MI.eraseFromParent();
1482 case ARM::VLD2q8Pseudo:
1483 case ARM::VLD2q16Pseudo:
1484 case ARM::VLD2q32Pseudo:
1485 case ARM::VLD2q8PseudoWB_fixed:
1486 case ARM::VLD2q16PseudoWB_fixed:
1487 case ARM::VLD2q32PseudoWB_fixed:
1488 case ARM::VLD2q8PseudoWB_register:
1489 case ARM::VLD2q16PseudoWB_register:
1490 case ARM::VLD2q32PseudoWB_register:
1491 case ARM::VLD3d8Pseudo:
1492 case ARM::VLD3d16Pseudo:
1493 case ARM::VLD3d32Pseudo:
1494 case ARM::VLD1d64TPseudo:
1495 case ARM::VLD1d64TPseudoWB_fixed:
1496 case ARM::VLD3d8Pseudo_UPD:
1497 case ARM::VLD3d16Pseudo_UPD:
1498 case ARM::VLD3d32Pseudo_UPD:
1499 case ARM::VLD3q8Pseudo_UPD:
1500 case ARM::VLD3q16Pseudo_UPD:
1501 case ARM::VLD3q32Pseudo_UPD:
1502 case ARM::VLD3q8oddPseudo:
1503 case ARM::VLD3q16oddPseudo:
1504 case ARM::VLD3q32oddPseudo:
1505 case ARM::VLD3q8oddPseudo_UPD:
1506 case ARM::VLD3q16oddPseudo_UPD:
1507 case ARM::VLD3q32oddPseudo_UPD:
1508 case ARM::VLD4d8Pseudo:
1509 case ARM::VLD4d16Pseudo:
1510 case ARM::VLD4d32Pseudo:
1511 case ARM::VLD1d64QPseudo:
1512 case ARM::VLD1d64QPseudoWB_fixed:
1513 case ARM::VLD4d8Pseudo_UPD:
1514 case ARM::VLD4d16Pseudo_UPD:
1515 case ARM::VLD4d32Pseudo_UPD:
1516 case ARM::VLD4q8Pseudo_UPD:
1517 case ARM::VLD4q16Pseudo_UPD:
1518 case ARM::VLD4q32Pseudo_UPD:
1519 case ARM::VLD4q8oddPseudo:
1520 case ARM::VLD4q16oddPseudo:
1521 case ARM::VLD4q32oddPseudo:
1522 case ARM::VLD4q8oddPseudo_UPD:
1523 case ARM::VLD4q16oddPseudo_UPD:
1524 case ARM::VLD4q32oddPseudo_UPD:
1525 case ARM::VLD3DUPd8Pseudo:
1526 case ARM::VLD3DUPd16Pseudo:
1527 case ARM::VLD3DUPd32Pseudo:
1528 case ARM::VLD3DUPd8Pseudo_UPD:
1529 case ARM::VLD3DUPd16Pseudo_UPD:
1530 case ARM::VLD3DUPd32Pseudo_UPD:
1531 case ARM::VLD4DUPd8Pseudo:
1532 case ARM::VLD4DUPd16Pseudo:
1533 case ARM::VLD4DUPd32Pseudo:
1534 case ARM::VLD4DUPd8Pseudo_UPD:
1535 case ARM::VLD4DUPd16Pseudo_UPD:
1536 case ARM::VLD4DUPd32Pseudo_UPD:
1540 case ARM::VST2q8Pseudo:
1541 case ARM::VST2q16Pseudo:
1542 case ARM::VST2q32Pseudo:
1543 case ARM::VST2q8PseudoWB_fixed:
1544 case ARM::VST2q16PseudoWB_fixed:
1545 case ARM::VST2q32PseudoWB_fixed:
1546 case ARM::VST2q8PseudoWB_register:
1547 case ARM::VST2q16PseudoWB_register:
1548 case ARM::VST2q32PseudoWB_register:
1549 case ARM::VST3d8Pseudo:
1550 case ARM::VST3d16Pseudo:
1551 case ARM::VST3d32Pseudo:
1552 case ARM::VST1d64TPseudo:
1553 case ARM::VST3d8Pseudo_UPD:
1554 case ARM::VST3d16Pseudo_UPD:
1555 case ARM::VST3d32Pseudo_UPD:
1556 case ARM::VST1d64TPseudoWB_fixed:
1557 case ARM::VST1d64TPseudoWB_register:
1558 case ARM::VST3q8Pseudo_UPD:
1559 case ARM::VST3q16Pseudo_UPD:
1560 case ARM::VST3q32Pseudo_UPD:
1561 case ARM::VST3q8oddPseudo:
1562 case ARM::VST3q16oddPseudo:
1563 case ARM::VST3q32oddPseudo:
1564 case ARM::VST3q8oddPseudo_UPD:
1565 case ARM::VST3q16oddPseudo_UPD:
1566 case ARM::VST3q32oddPseudo_UPD:
1567 case ARM::VST4d8Pseudo:
1568 case ARM::VST4d16Pseudo:
1569 case ARM::VST4d32Pseudo:
1570 case ARM::VST1d64QPseudo:
1571 case ARM::VST4d8Pseudo_UPD:
1572 case ARM::VST4d16Pseudo_UPD:
1573 case ARM::VST4d32Pseudo_UPD:
1574 case ARM::VST1d64QPseudoWB_fixed:
1575 case ARM::VST1d64QPseudoWB_register:
1576 case ARM::VST4q8Pseudo_UPD:
1577 case ARM::VST4q16Pseudo_UPD:
1578 case ARM::VST4q32Pseudo_UPD:
1579 case ARM::VST4q8oddPseudo:
1580 case ARM::VST4q16oddPseudo:
1581 case ARM::VST4q32oddPseudo:
1582 case ARM::VST4q8oddPseudo_UPD:
1583 case ARM::VST4q16oddPseudo_UPD:
1584 case ARM::VST4q32oddPseudo_UPD:
1588 case ARM::VLD1LNq8Pseudo:
1589 case ARM::VLD1LNq16Pseudo:
1590 case ARM::VLD1LNq32Pseudo:
1591 case ARM::VLD1LNq8Pseudo_UPD:
1592 case ARM::VLD1LNq16Pseudo_UPD:
1593 case ARM::VLD1LNq32Pseudo_UPD:
1594 case ARM::VLD2LNd8Pseudo:
1595 case ARM::VLD2LNd16Pseudo:
1596 case ARM::VLD2LNd32Pseudo:
1597 case ARM::VLD2LNq16Pseudo:
1598 case ARM::VLD2LNq32Pseudo:
1599 case ARM::VLD2LNd8Pseudo_UPD:
1600 case ARM::VLD2LNd16Pseudo_UPD:
1601 case ARM::VLD2LNd32Pseudo_UPD:
1602 case ARM::VLD2LNq16Pseudo_UPD:
1603 case ARM::VLD2LNq32Pseudo_UPD:
1604 case ARM::VLD3LNd8Pseudo:
1605 case ARM::VLD3LNd16Pseudo:
1606 case ARM::VLD3LNd32Pseudo:
1607 case ARM::VLD3LNq16Pseudo:
1608 case ARM::VLD3LNq32Pseudo:
1609 case ARM::VLD3LNd8Pseudo_UPD:
1610 case ARM::VLD3LNd16Pseudo_UPD:
1611 case ARM::VLD3LNd32Pseudo_UPD:
1612 case ARM::VLD3LNq16Pseudo_UPD:
1613 case ARM::VLD3LNq32Pseudo_UPD:
1614 case ARM::VLD4LNd8Pseudo:
1615 case ARM::VLD4LNd16Pseudo:
1616 case ARM::VLD4LNd32Pseudo:
1617 case ARM::VLD4LNq16Pseudo:
1618 case ARM::VLD4LNq32Pseudo:
1619 case ARM::VLD4LNd8Pseudo_UPD:
1620 case ARM::VLD4LNd16Pseudo_UPD:
1621 case ARM::VLD4LNd32Pseudo_UPD:
1622 case ARM::VLD4LNq16Pseudo_UPD:
1623 case ARM::VLD4LNq32Pseudo_UPD:
1624 case ARM::VST1LNq8Pseudo:
1625 case ARM::VST1LNq16Pseudo:
1626 case ARM::VST1LNq32Pseudo:
1627 case ARM::VST1LNq8Pseudo_UPD:
1628 case ARM::VST1LNq16Pseudo_UPD:
1629 case ARM::VST1LNq32Pseudo_UPD:
1630 case ARM::VST2LNd8Pseudo:
1631 case ARM::VST2LNd16Pseudo:
1632 case ARM::VST2LNd32Pseudo:
1633 case ARM::VST2LNq16Pseudo:
1634 case ARM::VST2LNq32Pseudo:
1635 case ARM::VST2LNd8Pseudo_UPD:
1636 case ARM::VST2LNd16Pseudo_UPD:
1637 case ARM::VST2LNd32Pseudo_UPD:
1638 case ARM::VST2LNq16Pseudo_UPD:
1639 case ARM::VST2LNq32Pseudo_UPD:
1640 case ARM::VST3LNd8Pseudo:
1641 case ARM::VST3LNd16Pseudo:
1642 case ARM::VST3LNd32Pseudo:
1643 case ARM::VST3LNq16Pseudo:
1644 case ARM::VST3LNq32Pseudo:
1645 case ARM::VST3LNd8Pseudo_UPD:
1646 case ARM::VST3LNd16Pseudo_UPD:
1647 case ARM::VST3LNd32Pseudo_UPD:
1648 case ARM::VST3LNq16Pseudo_UPD:
1649 case ARM::VST3LNq32Pseudo_UPD:
1650 case ARM::VST4LNd8Pseudo:
1651 case ARM::VST4LNd16Pseudo:
1652 case ARM::VST4LNd32Pseudo:
1653 case ARM::VST4LNq16Pseudo:
1654 case ARM::VST4LNq32Pseudo:
1655 case ARM::VST4LNd8Pseudo_UPD:
1656 case ARM::VST4LNd16Pseudo_UPD:
1657 case ARM::VST4LNd32Pseudo_UPD:
1658 case ARM::VST4LNq16Pseudo_UPD:
1659 case ARM::VST4LNq32Pseudo_UPD:
1663 case ARM::VTBL3Pseudo: ExpandVTBL(MBBI, ARM::VTBL3, false); return true;
1664 case ARM::VTBL4Pseudo: ExpandVTBL(MBBI, ARM::VTBL4, false); return true;
1665 case ARM::VTBX3Pseudo: ExpandVTBL(MBBI, ARM::VTBX3, true); return true;
1666 case ARM::VTBX4Pseudo: ExpandVTBL(MBBI, ARM::VTBX4, true); return true;
1668 case ARM::CMP_SWAP_8:
1670 return ExpandCMP_SWAP(MBB, MBBI, ARM::t2LDREXB, ARM::t2STREXB,
1671 ARM::tUXTB, NextMBBI);
1673 return ExpandCMP_SWAP(MBB, MBBI, ARM::LDREXB, ARM::STREXB,
1674 ARM::UXTB, NextMBBI);
1675 case ARM::CMP_SWAP_16:
1677 return ExpandCMP_SWAP(MBB, MBBI, ARM::t2LDREXH, ARM::t2STREXH,
1678 ARM::tUXTH, NextMBBI);
1680 return ExpandCMP_SWAP(MBB, MBBI, ARM::LDREXH, ARM::STREXH,
1681 ARM::UXTH, NextMBBI);
1682 case ARM::CMP_SWAP_32:
1684 return ExpandCMP_SWAP(MBB, MBBI, ARM::t2LDREX, ARM::t2STREX, 0,
1687 return ExpandCMP_SWAP(MBB, MBBI, ARM::LDREX, ARM::STREX, 0, NextMBBI);
1689 case ARM::CMP_SWAP_64:
1690 return ExpandCMP_SWAP_64(MBB, MBBI, NextMBBI);
1694 bool ARMExpandPseudo::ExpandMBB(MachineBasicBlock &MBB) {
1695 bool Modified = false;
1697 MachineBasicBlock::iterator MBBI = MBB.begin(), E = MBB.end();
1699 MachineBasicBlock::iterator NMBBI = std::next(MBBI);
1700 Modified |= ExpandMI(MBB, MBBI, NMBBI);
1707 bool ARMExpandPseudo::runOnMachineFunction(MachineFunction &MF) {
1708 STI = &static_cast<const ARMSubtarget &>(MF.getSubtarget());
1709 TII = STI->getInstrInfo();
1710 TRI = STI->getRegisterInfo();
1711 AFI = MF.getInfo<ARMFunctionInfo>();
1713 bool Modified = false;
1714 for (MachineFunction::iterator MFI = MF.begin(), E = MF.end(); MFI != E;
1716 Modified |= ExpandMBB(*MFI);
1717 if (VerifyARMPseudo)
1718 MF.verify(this, "After expanding ARM pseudo instructions.");
1722 /// createARMExpandPseudoPass - returns an instance of the pseudo instruction
1724 FunctionPass *llvm::createARMExpandPseudoPass() {
1725 return new ARMExpandPseudo();