LLVM  10.0.0svn
ARMExpandPseudoInsts.cpp
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1 //===-- ARMExpandPseudoInsts.cpp - Expand pseudo instructions -------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file contains a pass that expands pseudo instructions into target
10 // instructions to allow proper scheduling, if-conversion, and other late
11 // optimizations. This pass should be run after register allocation but before
12 // the post-regalloc scheduling pass.
13 //
14 //===----------------------------------------------------------------------===//
15 
16 #include "ARM.h"
17 #include "ARMBaseInstrInfo.h"
18 #include "ARMBaseRegisterInfo.h"
19 #include "ARMConstantPoolValue.h"
20 #include "ARMMachineFunctionInfo.h"
21 #include "ARMSubtarget.h"
22 #include "MCTargetDesc/ARMAddressingModes.h"
23 #include "llvm/CodeGen/LivePhysRegs.h"
24 #include "llvm/CodeGen/MachineFrameInfo.h"
25 #include "llvm/CodeGen/MachineFunctionPass.h"
26 #include "llvm/Support/Debug.h"
27 
28 using namespace llvm;
29 
30 #define DEBUG_TYPE "arm-pseudo"
31 
32 static cl::opt<bool>
33 VerifyARMPseudo("verify-arm-pseudo-expand", cl::Hidden,
34  cl::desc("Verify machine code after expanding ARM pseudos"));
35 
36 #define ARM_EXPAND_PSEUDO_NAME "ARM pseudo instruction expansion pass"
37 
38 namespace {
39  class ARMExpandPseudo : public MachineFunctionPass {
40  public:
41  static char ID;
42  ARMExpandPseudo() : MachineFunctionPass(ID) {}
43 
44  const ARMBaseInstrInfo *TII;
45  const TargetRegisterInfo *TRI;
46  const ARMSubtarget *STI;
47  ARMFunctionInfo *AFI;
48 
49  bool runOnMachineFunction(MachineFunction &Fn) override;
50 
51  MachineFunctionProperties getRequiredProperties() const override {
52  return MachineFunctionProperties().set(
53  MachineFunctionProperties::Property::NoVRegs);
54  }
55 
56  StringRef getPassName() const override {
57  return ARM_EXPAND_PSEUDO_NAME;
58  }
59 
60  private:
61  void TransferImpOps(MachineInstr &OldMI,
62  MachineInstrBuilder &UseMI, MachineInstrBuilder &DefMI);
63  bool ExpandMI(MachineBasicBlock &MBB,
64  MachineBasicBlock::iterator MBBI,
65  MachineBasicBlock::iterator &NextMBBI);
66  bool ExpandMBB(MachineBasicBlock &MBB);
67  void ExpandVLD(MachineBasicBlock::iterator &MBBI);
68  void ExpandVST(MachineBasicBlock::iterator &MBBI);
69  void ExpandLaneOp(MachineBasicBlock::iterator &MBBI);
70  void ExpandVTBL(MachineBasicBlock::iterator &MBBI,
71  unsigned Opc, bool IsExt);
72  void ExpandMOV32BitImm(MachineBasicBlock &MBB,
73  MachineBasicBlock::iterator &MBBI);
74  bool ExpandCMP_SWAP(MachineBasicBlock &MBB,
75  MachineBasicBlock::iterator MBBI, unsigned LdrexOp,
76  unsigned StrexOp, unsigned UxtOp,
77  MachineBasicBlock::iterator &NextMBBI);
78 
79  bool ExpandCMP_SWAP_64(MachineBasicBlock &MBB,
80  MachineBasicBlock::iterator MBBI,
81  MachineBasicBlock::iterator &NextMBBI);
82  };
83  char ARMExpandPseudo::ID = 0;
84 }
85 
86 INITIALIZE_PASS(ARMExpandPseudo, DEBUG_TYPE, ARM_EXPAND_PSEUDO_NAME, false,
87  false)
88 
89 /// TransferImpOps - Transfer implicit operands on the pseudo instruction to
90 /// the instructions created from the expansion.
91 void ARMExpandPseudo::TransferImpOps(MachineInstr &OldMI,
92  MachineInstrBuilder &UseMI,
93  MachineInstrBuilder &DefMI) {
94  const MCInstrDesc &Desc = OldMI.getDesc();
95  for (unsigned i = Desc.getNumOperands(), e = OldMI.getNumOperands();
96  i != e; ++i) {
97  const MachineOperand &MO = OldMI.getOperand(i);
98  assert(MO.isReg() && MO.getReg());
99  if (MO.isUse())
100  UseMI.add(MO);
101  else
102  DefMI.add(MO);
103  }
104 }
105 
106 namespace {
107  // Constants for register spacing in NEON load/store instructions.
108  // For quad-register load-lane and store-lane pseudo instructors, the
109  // spacing is initially assumed to be EvenDblSpc, and that is changed to
110  // OddDblSpc depending on the lane number operand.
111  enum NEONRegSpacing {
112  SingleSpc,
113  SingleLowSpc , // Single spacing, low registers, three and four vectors.
114  SingleHighQSpc, // Single spacing, high registers, four vectors.
115  SingleHighTSpc, // Single spacing, high registers, three vectors.
116  EvenDblSpc,
117  OddDblSpc
118  };
119 
120  // Entries for NEON load/store information table. The table is sorted by
121  // PseudoOpc for fast binary-search lookups.
122  struct NEONLdStTableEntry {
123  uint16_t PseudoOpc;
124  uint16_t RealOpc;
125  bool IsLoad;
126  bool isUpdating;
127  bool hasWritebackOperand;
128  uint8_t RegSpacing; // One of type NEONRegSpacing
129  uint8_t NumRegs; // D registers loaded or stored
130  uint8_t RegElts; // elements per D register; used for lane ops
131  // FIXME: Temporary flag to denote whether the real instruction takes
132  // a single register (like the encoding) or all of the registers in
133  // the list (like the asm syntax and the isel DAG). When all definitions
134  // are converted to take only the single encoded register, this will
135  // go away.
136  bool copyAllListRegs;
137 
138  // Comparison methods for binary search of the table.
139  bool operator<(const NEONLdStTableEntry &TE) const {
140  return PseudoOpc < TE.PseudoOpc;
141  }
142  friend bool operator<(const NEONLdStTableEntry &TE, unsigned PseudoOpc) {
143  return TE.PseudoOpc < PseudoOpc;
144  }
145  friend bool LLVM_ATTRIBUTE_UNUSED operator<(unsigned PseudoOpc,
146  const NEONLdStTableEntry &TE) {
147  return PseudoOpc < TE.PseudoOpc;
148  }
149  };
150 }
151 
152 static const NEONLdStTableEntry NEONLdStTable[] = {
153 { ARM::VLD1LNq16Pseudo, ARM::VLD1LNd16, true, false, false, EvenDblSpc, 1, 4 ,true},
154 { ARM::VLD1LNq16Pseudo_UPD, ARM::VLD1LNd16_UPD, true, true, true, EvenDblSpc, 1, 4 ,true},
155 { ARM::VLD1LNq32Pseudo, ARM::VLD1LNd32, true, false, false, EvenDblSpc, 1, 2 ,true},
156 { ARM::VLD1LNq32Pseudo_UPD, ARM::VLD1LNd32_UPD, true, true, true, EvenDblSpc, 1, 2 ,true},
157 { ARM::VLD1LNq8Pseudo, ARM::VLD1LNd8, true, false, false, EvenDblSpc, 1, 8 ,true},
158 { ARM::VLD1LNq8Pseudo_UPD, ARM::VLD1LNd8_UPD, true, true, true, EvenDblSpc, 1, 8 ,true},
159 
160 { ARM::VLD1d16QPseudo, ARM::VLD1d16Q, true, false, false, SingleSpc, 4, 4 ,false},
161 { ARM::VLD1d16TPseudo, ARM::VLD1d16T, true, false, false, SingleSpc, 3, 4 ,false},
162 { ARM::VLD1d32QPseudo, ARM::VLD1d32Q, true, false, false, SingleSpc, 4, 2 ,false},
163 { ARM::VLD1d32TPseudo, ARM::VLD1d32T, true, false, false, SingleSpc, 3, 2 ,false},
164 { ARM::VLD1d64QPseudo, ARM::VLD1d64Q, true, false, false, SingleSpc, 4, 1 ,false},
165 { ARM::VLD1d64QPseudoWB_fixed, ARM::VLD1d64Qwb_fixed, true, true, false, SingleSpc, 4, 1 ,false},
166 { ARM::VLD1d64QPseudoWB_register, ARM::VLD1d64Qwb_register, true, true, true, SingleSpc, 4, 1 ,false},
167 { ARM::VLD1d64TPseudo, ARM::VLD1d64T, true, false, false, SingleSpc, 3, 1 ,false},
168 { ARM::VLD1d64TPseudoWB_fixed, ARM::VLD1d64Twb_fixed, true, true, false, SingleSpc, 3, 1 ,false},
169 { ARM::VLD1d64TPseudoWB_register, ARM::VLD1d64Twb_register, true, true, true, SingleSpc, 3, 1 ,false},
170 { ARM::VLD1d8QPseudo, ARM::VLD1d8Q, true, false, false, SingleSpc, 4, 8 ,false},
171 { ARM::VLD1d8TPseudo, ARM::VLD1d8T, true, false, false, SingleSpc, 3, 8 ,false},
172 { ARM::VLD1q16HighQPseudo, ARM::VLD1d16Q, true, false, false, SingleHighQSpc, 4, 4 ,false},
173 { ARM::VLD1q16HighTPseudo, ARM::VLD1d16T, true, false, false, SingleHighTSpc, 3, 4 ,false},
174 { ARM::VLD1q16LowQPseudo_UPD, ARM::VLD1d16Qwb_fixed, true, true, true, SingleLowSpc, 4, 4 ,false},
175 { ARM::VLD1q16LowTPseudo_UPD, ARM::VLD1d16Twb_fixed, true, true, true, SingleLowSpc, 3, 4 ,false},
176 { ARM::VLD1q32HighQPseudo, ARM::VLD1d32Q, true, false, false, SingleHighQSpc, 4, 2 ,false},
177 { ARM::VLD1q32HighTPseudo, ARM::VLD1d32T, true, false, false, SingleHighTSpc, 3, 2 ,false},
178 { ARM::VLD1q32LowQPseudo_UPD, ARM::VLD1d32Qwb_fixed, true, true, true, SingleLowSpc, 4, 2 ,false},
179 { ARM::VLD1q32LowTPseudo_UPD, ARM::VLD1d32Twb_fixed, true, true, true, SingleLowSpc, 3, 2 ,false},
180 { ARM::VLD1q64HighQPseudo, ARM::VLD1d64Q, true, false, false, SingleHighQSpc, 4, 1 ,false},
181 { ARM::VLD1q64HighTPseudo, ARM::VLD1d64T, true, false, false, SingleHighTSpc, 3, 1 ,false},
182 { ARM::VLD1q64LowQPseudo_UPD, ARM::VLD1d64Qwb_fixed, true, true, true, SingleLowSpc, 4, 1 ,false},
183 { ARM::VLD1q64LowTPseudo_UPD, ARM::VLD1d64Twb_fixed, true, true, true, SingleLowSpc, 3, 1 ,false},
184 { ARM::VLD1q8HighQPseudo, ARM::VLD1d8Q, true, false, false, SingleHighQSpc, 4, 8 ,false},
185 { ARM::VLD1q8HighTPseudo, ARM::VLD1d8T, true, false, false, SingleHighTSpc, 3, 8 ,false},
186 { ARM::VLD1q8LowQPseudo_UPD, ARM::VLD1d8Qwb_fixed, true, true, true, SingleLowSpc, 4, 8 ,false},
187 { ARM::VLD1q8LowTPseudo_UPD, ARM::VLD1d8Twb_fixed, true, true, true, SingleLowSpc, 3, 8 ,false},
188 
189 { ARM::VLD2DUPq16EvenPseudo, ARM::VLD2DUPd16x2, true, false, false, EvenDblSpc, 2, 4 ,false},
190 { ARM::VLD2DUPq16OddPseudo, ARM::VLD2DUPd16x2, true, false, false, OddDblSpc, 2, 4 ,false},
191 { ARM::VLD2DUPq32EvenPseudo, ARM::VLD2DUPd32x2, true, false, false, EvenDblSpc, 2, 2 ,false},
192 { ARM::VLD2DUPq32OddPseudo, ARM::VLD2DUPd32x2, true, false, false, OddDblSpc, 2, 2 ,false},
193 { ARM::VLD2DUPq8EvenPseudo, ARM::VLD2DUPd8x2, true, false, false, EvenDblSpc, 2, 8 ,false},
194 { ARM::VLD2DUPq8OddPseudo, ARM::VLD2DUPd8x2, true, false, false, OddDblSpc, 2, 8 ,false},
195 
196 { ARM::VLD2LNd16Pseudo, ARM::VLD2LNd16, true, false, false, SingleSpc, 2, 4 ,true},
197 { ARM::VLD2LNd16Pseudo_UPD, ARM::VLD2LNd16_UPD, true, true, true, SingleSpc, 2, 4 ,true},
198 { ARM::VLD2LNd32Pseudo, ARM::VLD2LNd32, true, false, false, SingleSpc, 2, 2 ,true},
199 { ARM::VLD2LNd32Pseudo_UPD, ARM::VLD2LNd32_UPD, true, true, true, SingleSpc, 2, 2 ,true},
200 { ARM::VLD2LNd8Pseudo, ARM::VLD2LNd8, true, false, false, SingleSpc, 2, 8 ,true},
201 { ARM::VLD2LNd8Pseudo_UPD, ARM::VLD2LNd8_UPD, true, true, true, SingleSpc, 2, 8 ,true},
202 { ARM::VLD2LNq16Pseudo, ARM::VLD2LNq16, true, false, false, EvenDblSpc, 2, 4 ,true},
203 { ARM::VLD2LNq16Pseudo_UPD, ARM::VLD2LNq16_UPD, true, true, true, EvenDblSpc, 2, 4 ,true},
204 { ARM::VLD2LNq32Pseudo, ARM::VLD2LNq32, true, false, false, EvenDblSpc, 2, 2 ,true},
205 { ARM::VLD2LNq32Pseudo_UPD, ARM::VLD2LNq32_UPD, true, true, true, EvenDblSpc, 2, 2 ,true},
206 
207 { ARM::VLD2q16Pseudo, ARM::VLD2q16, true, false, false, SingleSpc, 4, 4 ,false},
208 { ARM::VLD2q16PseudoWB_fixed, ARM::VLD2q16wb_fixed, true, true, false, SingleSpc, 4, 4 ,false},
209 { ARM::VLD2q16PseudoWB_register, ARM::VLD2q16wb_register, true, true, true, SingleSpc, 4, 4 ,false},
210 { ARM::VLD2q32Pseudo, ARM::VLD2q32, true, false, false, SingleSpc, 4, 2 ,false},
211 { ARM::VLD2q32PseudoWB_fixed, ARM::VLD2q32wb_fixed, true, true, false, SingleSpc, 4, 2 ,false},
212 { ARM::VLD2q32PseudoWB_register, ARM::VLD2q32wb_register, true, true, true, SingleSpc, 4, 2 ,false},
213 { ARM::VLD2q8Pseudo, ARM::VLD2q8, true, false, false, SingleSpc, 4, 8 ,false},
214 { ARM::VLD2q8PseudoWB_fixed, ARM::VLD2q8wb_fixed, true, true, false, SingleSpc, 4, 8 ,false},
215 { ARM::VLD2q8PseudoWB_register, ARM::VLD2q8wb_register, true, true, true, SingleSpc, 4, 8 ,false},
216 
217 { ARM::VLD3DUPd16Pseudo, ARM::VLD3DUPd16, true, false, false, SingleSpc, 3, 4,true},
218 { ARM::VLD3DUPd16Pseudo_UPD, ARM::VLD3DUPd16_UPD, true, true, true, SingleSpc, 3, 4,true},
219 { ARM::VLD3DUPd32Pseudo, ARM::VLD3DUPd32, true, false, false, SingleSpc, 3, 2,true},
220 { ARM::VLD3DUPd32Pseudo_UPD, ARM::VLD3DUPd32_UPD, true, true, true, SingleSpc, 3, 2,true},
221 { ARM::VLD3DUPd8Pseudo, ARM::VLD3DUPd8, true, false, false, SingleSpc, 3, 8,true},
222 { ARM::VLD3DUPd8Pseudo_UPD, ARM::VLD3DUPd8_UPD, true, true, true, SingleSpc, 3, 8,true},
223 { ARM::VLD3DUPq16EvenPseudo, ARM::VLD3DUPq16, true, false, false, EvenDblSpc, 3, 4 ,true},
224 { ARM::VLD3DUPq16OddPseudo, ARM::VLD3DUPq16, true, false, false, OddDblSpc, 3, 4 ,true},
225 { ARM::VLD3DUPq32EvenPseudo, ARM::VLD3DUPq32, true, false, false, EvenDblSpc, 3, 2 ,true},
226 { ARM::VLD3DUPq32OddPseudo, ARM::VLD3DUPq32, true, false, false, OddDblSpc, 3, 2 ,true},
227 { ARM::VLD3DUPq8EvenPseudo, ARM::VLD3DUPq8, true, false, false, EvenDblSpc, 3, 8 ,true},
228 { ARM::VLD3DUPq8OddPseudo, ARM::VLD3DUPq8, true, false, false, OddDblSpc, 3, 8 ,true},
229 
230 { ARM::VLD3LNd16Pseudo, ARM::VLD3LNd16, true, false, false, SingleSpc, 3, 4 ,true},
231 { ARM::VLD3LNd16Pseudo_UPD, ARM::VLD3LNd16_UPD, true, true, true, SingleSpc, 3, 4 ,true},
232 { ARM::VLD3LNd32Pseudo, ARM::VLD3LNd32, true, false, false, SingleSpc, 3, 2 ,true},
233 { ARM::VLD3LNd32Pseudo_UPD, ARM::VLD3LNd32_UPD, true, true, true, SingleSpc, 3, 2 ,true},
234 { ARM::VLD3LNd8Pseudo, ARM::VLD3LNd8, true, false, false, SingleSpc, 3, 8 ,true},
235 { ARM::VLD3LNd8Pseudo_UPD, ARM::VLD3LNd8_UPD, true, true, true, SingleSpc, 3, 8 ,true},
236 { ARM::VLD3LNq16Pseudo, ARM::VLD3LNq16, true, false, false, EvenDblSpc, 3, 4 ,true},
237 { ARM::VLD3LNq16Pseudo_UPD, ARM::VLD3LNq16_UPD, true, true, true, EvenDblSpc, 3, 4 ,true},
238 { ARM::VLD3LNq32Pseudo, ARM::VLD3LNq32, true, false, false, EvenDblSpc, 3, 2 ,true},
239 { ARM::VLD3LNq32Pseudo_UPD, ARM::VLD3LNq32_UPD, true, true, true, EvenDblSpc, 3, 2 ,true},
240 
241 { ARM::VLD3d16Pseudo, ARM::VLD3d16, true, false, false, SingleSpc, 3, 4 ,true},
242 { ARM::VLD3d16Pseudo_UPD, ARM::VLD3d16_UPD, true, true, true, SingleSpc, 3, 4 ,true},
243 { ARM::VLD3d32Pseudo, ARM::VLD3d32, true, false, false, SingleSpc, 3, 2 ,true},
244 { ARM::VLD3d32Pseudo_UPD, ARM::VLD3d32_UPD, true, true, true, SingleSpc, 3, 2 ,true},
245 { ARM::VLD3d8Pseudo, ARM::VLD3d8, true, false, false, SingleSpc, 3, 8 ,true},
246 { ARM::VLD3d8Pseudo_UPD, ARM::VLD3d8_UPD, true, true, true, SingleSpc, 3, 8 ,true},
247 
248 { ARM::VLD3q16Pseudo_UPD, ARM::VLD3q16_UPD, true, true, true, EvenDblSpc, 3, 4 ,true},
249 { ARM::VLD3q16oddPseudo, ARM::VLD3q16, true, false, false, OddDblSpc, 3, 4 ,true},
250 { ARM::VLD3q16oddPseudo_UPD, ARM::VLD3q16_UPD, true, true, true, OddDblSpc, 3, 4 ,true},
251 { ARM::VLD3q32Pseudo_UPD, ARM::VLD3q32_UPD, true, true, true, EvenDblSpc, 3, 2 ,true},
252 { ARM::VLD3q32oddPseudo, ARM::VLD3q32, true, false, false, OddDblSpc, 3, 2 ,true},
253 { ARM::VLD3q32oddPseudo_UPD, ARM::VLD3q32_UPD, true, true, true, OddDblSpc, 3, 2 ,true},
254 { ARM::VLD3q8Pseudo_UPD, ARM::VLD3q8_UPD, true, true, true, EvenDblSpc, 3, 8 ,true},
255 { ARM::VLD3q8oddPseudo, ARM::VLD3q8, true, false, false, OddDblSpc, 3, 8 ,true},
256 { ARM::VLD3q8oddPseudo_UPD, ARM::VLD3q8_UPD, true, true, true, OddDblSpc, 3, 8 ,true},
257 
258 { ARM::VLD4DUPd16Pseudo, ARM::VLD4DUPd16, true, false, false, SingleSpc, 4, 4,true},
259 { ARM::VLD4DUPd16Pseudo_UPD, ARM::VLD4DUPd16_UPD, true, true, true, SingleSpc, 4, 4,true},
260 { ARM::VLD4DUPd32Pseudo, ARM::VLD4DUPd32, true, false, false, SingleSpc, 4, 2,true},
261 { ARM::VLD4DUPd32Pseudo_UPD, ARM::VLD4DUPd32_UPD, true, true, true, SingleSpc, 4, 2,true},
262 { ARM::VLD4DUPd8Pseudo, ARM::VLD4DUPd8, true, false, false, SingleSpc, 4, 8,true},
263 { ARM::VLD4DUPd8Pseudo_UPD, ARM::VLD4DUPd8_UPD, true, true, true, SingleSpc, 4, 8,true},
264 { ARM::VLD4DUPq16EvenPseudo, ARM::VLD4DUPq16, true, false, false, EvenDblSpc, 4, 4 ,true},
265 { ARM::VLD4DUPq16OddPseudo, ARM::VLD4DUPq16, true, false, false, OddDblSpc, 4, 4 ,true},
266 { ARM::VLD4DUPq32EvenPseudo, ARM::VLD4DUPq32, true, false, false, EvenDblSpc, 4, 2 ,true},
267 { ARM::VLD4DUPq32OddPseudo, ARM::VLD4DUPq32, true, false, false, OddDblSpc, 4, 2 ,true},
268 { ARM::VLD4DUPq8EvenPseudo, ARM::VLD4DUPq8, true, false, false, EvenDblSpc, 4, 8 ,true},
269 { ARM::VLD4DUPq8OddPseudo, ARM::VLD4DUPq8, true, false, false, OddDblSpc, 4, 8 ,true},
270 
271 { ARM::VLD4LNd16Pseudo, ARM::VLD4LNd16, true, false, false, SingleSpc, 4, 4 ,true},
272 { ARM::VLD4LNd16Pseudo_UPD, ARM::VLD4LNd16_UPD, true, true, true, SingleSpc, 4, 4 ,true},
273 { ARM::VLD4LNd32Pseudo, ARM::VLD4LNd32, true, false, false, SingleSpc, 4, 2 ,true},
274 { ARM::VLD4LNd32Pseudo_UPD, ARM::VLD4LNd32_UPD, true, true, true, SingleSpc, 4, 2 ,true},
275 { ARM::VLD4LNd8Pseudo, ARM::VLD4LNd8, true, false, false, SingleSpc, 4, 8 ,true},
276 { ARM::VLD4LNd8Pseudo_UPD, ARM::VLD4LNd8_UPD, true, true, true, SingleSpc, 4, 8 ,true},
277 { ARM::VLD4LNq16Pseudo, ARM::VLD4LNq16, true, false, false, EvenDblSpc, 4, 4 ,true},
278 { ARM::VLD4LNq16Pseudo_UPD, ARM::VLD4LNq16_UPD, true, true, true, EvenDblSpc, 4, 4 ,true},
279 { ARM::VLD4LNq32Pseudo, ARM::VLD4LNq32, true, false, false, EvenDblSpc, 4, 2 ,true},
280 { ARM::VLD4LNq32Pseudo_UPD, ARM::VLD4LNq32_UPD, true, true, true, EvenDblSpc, 4, 2 ,true},
281 
282 { ARM::VLD4d16Pseudo, ARM::VLD4d16, true, false, false, SingleSpc, 4, 4 ,true},
283 { ARM::VLD4d16Pseudo_UPD, ARM::VLD4d16_UPD, true, true, true, SingleSpc, 4, 4 ,true},
284 { ARM::VLD4d32Pseudo, ARM::VLD4d32, true, false, false, SingleSpc, 4, 2 ,true},
285 { ARM::VLD4d32Pseudo_UPD, ARM::VLD4d32_UPD, true, true, true, SingleSpc, 4, 2 ,true},
286 { ARM::VLD4d8Pseudo, ARM::VLD4d8, true, false, false, SingleSpc, 4, 8 ,true},
287 { ARM::VLD4d8Pseudo_UPD, ARM::VLD4d8_UPD, true, true, true, SingleSpc, 4, 8 ,true},
288 
289 { ARM::VLD4q16Pseudo_UPD, ARM::VLD4q16_UPD, true, true, true, EvenDblSpc, 4, 4 ,true},
290 { ARM::VLD4q16oddPseudo, ARM::VLD4q16, true, false, false, OddDblSpc, 4, 4 ,true},
291 { ARM::VLD4q16oddPseudo_UPD, ARM::VLD4q16_UPD, true, true, true, OddDblSpc, 4, 4 ,true},
292 { ARM::VLD4q32Pseudo_UPD, ARM::VLD4q32_UPD, true, true, true, EvenDblSpc, 4, 2 ,true},
293 { ARM::VLD4q32oddPseudo, ARM::VLD4q32, true, false, false, OddDblSpc, 4, 2 ,true},
294 { ARM::VLD4q32oddPseudo_UPD, ARM::VLD4q32_UPD, true, true, true, OddDblSpc, 4, 2 ,true},
295 { ARM::VLD4q8Pseudo_UPD, ARM::VLD4q8_UPD, true, true, true, EvenDblSpc, 4, 8 ,true},
296 { ARM::VLD4q8oddPseudo, ARM::VLD4q8, true, false, false, OddDblSpc, 4, 8 ,true},
297 { ARM::VLD4q8oddPseudo_UPD, ARM::VLD4q8_UPD, true, true, true, OddDblSpc, 4, 8 ,true},
298 
299 { ARM::VST1LNq16Pseudo, ARM::VST1LNd16, false, false, false, EvenDblSpc, 1, 4 ,true},
300 { ARM::VST1LNq16Pseudo_UPD, ARM::VST1LNd16_UPD, false, true, true, EvenDblSpc, 1, 4 ,true},
301 { ARM::VST1LNq32Pseudo, ARM::VST1LNd32, false, false, false, EvenDblSpc, 1, 2 ,true},
302 { ARM::VST1LNq32Pseudo_UPD, ARM::VST1LNd32_UPD, false, true, true, EvenDblSpc, 1, 2 ,true},
303 { ARM::VST1LNq8Pseudo, ARM::VST1LNd8, false, false, false, EvenDblSpc, 1, 8 ,true},
304 { ARM::VST1LNq8Pseudo_UPD, ARM::VST1LNd8_UPD, false, true, true, EvenDblSpc, 1, 8 ,true},
305 
306 { ARM::VST1d16QPseudo, ARM::VST1d16Q, false, false, false, SingleSpc, 4, 4 ,false},
307 { ARM::VST1d16TPseudo, ARM::VST1d16T, false, false, false, SingleSpc, 3, 4 ,false},
308 { ARM::VST1d32QPseudo, ARM::VST1d32Q, false, false, false, SingleSpc, 4, 2 ,false},
309 { ARM::VST1d32TPseudo, ARM::VST1d32T, false, false, false, SingleSpc, 3, 2 ,false},
310 { ARM::VST1d64QPseudo, ARM::VST1d64Q, false, false, false, SingleSpc, 4, 1 ,false},
311 { ARM::VST1d64QPseudoWB_fixed, ARM::VST1d64Qwb_fixed, false, true, false, SingleSpc, 4, 1 ,false},
312 { ARM::VST1d64QPseudoWB_register, ARM::VST1d64Qwb_register, false, true, true, SingleSpc, 4, 1 ,false},
313 { ARM::VST1d64TPseudo, ARM::VST1d64T, false, false, false, SingleSpc, 3, 1 ,false},
314 { ARM::VST1d64TPseudoWB_fixed, ARM::VST1d64Twb_fixed, false, true, false, SingleSpc, 3, 1 ,false},
315 { ARM::VST1d64TPseudoWB_register, ARM::VST1d64Twb_register, false, true, true, SingleSpc, 3, 1 ,false},
316 { ARM::VST1d8QPseudo, ARM::VST1d8Q, false, false, false, SingleSpc, 4, 8 ,false},
317 { ARM::VST1d8TPseudo, ARM::VST1d8T, false, false, false, SingleSpc, 3, 8 ,false},
318 { ARM::VST1q16HighQPseudo, ARM::VST1d16Q, false, false, false, SingleHighQSpc, 4, 4 ,false},
319 { ARM::VST1q16HighTPseudo, ARM::VST1d16T, false, false, false, SingleHighTSpc, 3, 4 ,false},
320 { ARM::VST1q16LowQPseudo_UPD, ARM::VST1d16Qwb_fixed, false, true, true, SingleLowSpc, 4, 4 ,false},
321 { ARM::VST1q16LowTPseudo_UPD, ARM::VST1d16Twb_fixed, false, true, true, SingleLowSpc, 3, 4 ,false},
322 { ARM::VST1q32HighQPseudo, ARM::VST1d32Q, false, false, false, SingleHighQSpc, 4, 2 ,false},
323 { ARM::VST1q32HighTPseudo, ARM::VST1d32T, false, false, false, SingleHighTSpc, 3, 2 ,false},
324 { ARM::VST1q32LowQPseudo_UPD, ARM::VST1d32Qwb_fixed, false, true, true, SingleLowSpc, 4, 2 ,false},
325 { ARM::VST1q32LowTPseudo_UPD, ARM::VST1d32Twb_fixed, false, true, true, SingleLowSpc, 3, 2 ,false},
326 { ARM::VST1q64HighQPseudo, ARM::VST1d64Q, false, false, false, SingleHighQSpc, 4, 1 ,false},
327 { ARM::VST1q64HighTPseudo, ARM::VST1d64T, false, false, false, SingleHighTSpc, 3, 1 ,false},
328 { ARM::VST1q64LowQPseudo_UPD, ARM::VST1d64Qwb_fixed, false, true, true, SingleLowSpc, 4, 1 ,false},
329 { ARM::VST1q64LowTPseudo_UPD, ARM::VST1d64Twb_fixed, false, true, true, SingleLowSpc, 3, 1 ,false},
330 { ARM::VST1q8HighQPseudo, ARM::VST1d8Q, false, false, false, SingleHighQSpc, 4, 8 ,false},
331 { ARM::VST1q8HighTPseudo, ARM::VST1d8T, false, false, false, SingleHighTSpc, 3, 8 ,false},
332 { ARM::VST1q8LowQPseudo_UPD, ARM::VST1d8Qwb_fixed, false, true, true, SingleLowSpc, 4, 8 ,false},
333 { ARM::VST1q8LowTPseudo_UPD, ARM::VST1d8Twb_fixed, false, true, true, SingleLowSpc, 3, 8 ,false},
334 
335 { ARM::VST2LNd16Pseudo, ARM::VST2LNd16, false, false, false, SingleSpc, 2, 4 ,true},
336 { ARM::VST2LNd16Pseudo_UPD, ARM::VST2LNd16_UPD, false, true, true, SingleSpc, 2, 4 ,true},
337 { ARM::VST2LNd32Pseudo, ARM::VST2LNd32, false, false, false, SingleSpc, 2, 2 ,true},
338 { ARM::VST2LNd32Pseudo_UPD, ARM::VST2LNd32_UPD, false, true, true, SingleSpc, 2, 2 ,true},
339 { ARM::VST2LNd8Pseudo, ARM::VST2LNd8, false, false, false, SingleSpc, 2, 8 ,true},
340 { ARM::VST2LNd8Pseudo_UPD, ARM::VST2LNd8_UPD, false, true, true, SingleSpc, 2, 8 ,true},
341 { ARM::VST2LNq16Pseudo, ARM::VST2LNq16, false, false, false, EvenDblSpc, 2, 4,true},
342 { ARM::VST2LNq16Pseudo_UPD, ARM::VST2LNq16_UPD, false, true, true, EvenDblSpc, 2, 4,true},
343 { ARM::VST2LNq32Pseudo, ARM::VST2LNq32, false, false, false, EvenDblSpc, 2, 2,true},
344 { ARM::VST2LNq32Pseudo_UPD, ARM::VST2LNq32_UPD, false, true, true, EvenDblSpc, 2, 2,true},
345 
346 { ARM::VST2q16Pseudo, ARM::VST2q16, false, false, false, SingleSpc, 4, 4 ,false},
347 { ARM::VST2q16PseudoWB_fixed, ARM::VST2q16wb_fixed, false, true, false, SingleSpc, 4, 4 ,false},
348 { ARM::VST2q16PseudoWB_register, ARM::VST2q16wb_register, false, true, true, SingleSpc, 4, 4 ,false},
349 { ARM::VST2q32Pseudo, ARM::VST2q32, false, false, false, SingleSpc, 4, 2 ,false},
350 { ARM::VST2q32PseudoWB_fixed, ARM::VST2q32wb_fixed, false, true, false, SingleSpc, 4, 2 ,false},
351 { ARM::VST2q32PseudoWB_register, ARM::VST2q32wb_register, false, true, true, SingleSpc, 4, 2 ,false},
352 { ARM::VST2q8Pseudo, ARM::VST2q8, false, false, false, SingleSpc, 4, 8 ,false},
353 { ARM::VST2q8PseudoWB_fixed, ARM::VST2q8wb_fixed, false, true, false, SingleSpc, 4, 8 ,false},
354 { ARM::VST2q8PseudoWB_register, ARM::VST2q8wb_register, false, true, true, SingleSpc, 4, 8 ,false},
355 
356 { ARM::VST3LNd16Pseudo, ARM::VST3LNd16, false, false, false, SingleSpc, 3, 4 ,true},
357 { ARM::VST3LNd16Pseudo_UPD, ARM::VST3LNd16_UPD, false, true, true, SingleSpc, 3, 4 ,true},
358 { ARM::VST3LNd32Pseudo, ARM::VST3LNd32, false, false, false, SingleSpc, 3, 2 ,true},
359 { ARM::VST3LNd32Pseudo_UPD, ARM::VST3LNd32_UPD, false, true, true, SingleSpc, 3, 2 ,true},
360 { ARM::VST3LNd8Pseudo, ARM::VST3LNd8, false, false, false, SingleSpc, 3, 8 ,true},
361 { ARM::VST3LNd8Pseudo_UPD, ARM::VST3LNd8_UPD, false, true, true, SingleSpc, 3, 8 ,true},
362 { ARM::VST3LNq16Pseudo, ARM::VST3LNq16, false, false, false, EvenDblSpc, 3, 4,true},
363 { ARM::VST3LNq16Pseudo_UPD, ARM::VST3LNq16_UPD, false, true, true, EvenDblSpc, 3, 4,true},
364 { ARM::VST3LNq32Pseudo, ARM::VST3LNq32, false, false, false, EvenDblSpc, 3, 2,true},
365 { ARM::VST3LNq32Pseudo_UPD, ARM::VST3LNq32_UPD, false, true, true, EvenDblSpc, 3, 2,true},
366 
367 { ARM::VST3d16Pseudo, ARM::VST3d16, false, false, false, SingleSpc, 3, 4 ,true},
368 { ARM::VST3d16Pseudo_UPD, ARM::VST3d16_UPD, false, true, true, SingleSpc, 3, 4 ,true},
369 { ARM::VST3d32Pseudo, ARM::VST3d32, false, false, false, SingleSpc, 3, 2 ,true},
370 { ARM::VST3d32Pseudo_UPD, ARM::VST3d32_UPD, false, true, true, SingleSpc, 3, 2 ,true},
371 { ARM::VST3d8Pseudo, ARM::VST3d8, false, false, false, SingleSpc, 3, 8 ,true},
372 { ARM::VST3d8Pseudo_UPD, ARM::VST3d8_UPD, false, true, true, SingleSpc, 3, 8 ,true},
373 
374 { ARM::VST3q16Pseudo_UPD, ARM::VST3q16_UPD, false, true, true, EvenDblSpc, 3, 4 ,true},
375 { ARM::VST3q16oddPseudo, ARM::VST3q16, false, false, false, OddDblSpc, 3, 4 ,true},
376 { ARM::VST3q16oddPseudo_UPD, ARM::VST3q16_UPD, false, true, true, OddDblSpc, 3, 4 ,true},
377 { ARM::VST3q32Pseudo_UPD, ARM::VST3q32_UPD, false, true, true, EvenDblSpc, 3, 2 ,true},
378 { ARM::VST3q32oddPseudo, ARM::VST3q32, false, false, false, OddDblSpc, 3, 2 ,true},
379 { ARM::VST3q32oddPseudo_UPD, ARM::VST3q32_UPD, false, true, true, OddDblSpc, 3, 2 ,true},
380 { ARM::VST3q8Pseudo_UPD, ARM::VST3q8_UPD, false, true, true, EvenDblSpc, 3, 8 ,true},
381 { ARM::VST3q8oddPseudo, ARM::VST3q8, false, false, false, OddDblSpc, 3, 8 ,true},
382 { ARM::VST3q8oddPseudo_UPD, ARM::VST3q8_UPD, false, true, true, OddDblSpc, 3, 8 ,true},
383 
384 { ARM::VST4LNd16Pseudo, ARM::VST4LNd16, false, false, false, SingleSpc, 4, 4 ,true},
385 { ARM::VST4LNd16Pseudo_UPD, ARM::VST4LNd16_UPD, false, true, true, SingleSpc, 4, 4 ,true},
386 { ARM::VST4LNd32Pseudo, ARM::VST4LNd32, false, false, false, SingleSpc, 4, 2 ,true},
387 { ARM::VST4LNd32Pseudo_UPD, ARM::VST4LNd32_UPD, false, true, true, SingleSpc, 4, 2 ,true},
388 { ARM::VST4LNd8Pseudo, ARM::VST4LNd8, false, false, false, SingleSpc, 4, 8 ,true},
389 { ARM::VST4LNd8Pseudo_UPD, ARM::VST4LNd8_UPD, false, true, true, SingleSpc, 4, 8 ,true},
390 { ARM::VST4LNq16Pseudo, ARM::VST4LNq16, false, false, false, EvenDblSpc, 4, 4,true},
391 { ARM::VST4LNq16Pseudo_UPD, ARM::VST4LNq16_UPD, false, true, true, EvenDblSpc, 4, 4,true},
392 { ARM::VST4LNq32Pseudo, ARM::VST4LNq32, false, false, false, EvenDblSpc, 4, 2,true},
393 { ARM::VST4LNq32Pseudo_UPD, ARM::VST4LNq32_UPD, false, true, true, EvenDblSpc, 4, 2,true},
394 
395 { ARM::VST4d16Pseudo, ARM::VST4d16, false, false, false, SingleSpc, 4, 4 ,true},
396 { ARM::VST4d16Pseudo_UPD, ARM::VST4d16_UPD, false, true, true, SingleSpc, 4, 4 ,true},
397 { ARM::VST4d32Pseudo, ARM::VST4d32, false, false, false, SingleSpc, 4, 2 ,true},
398 { ARM::VST4d32Pseudo_UPD, ARM::VST4d32_UPD, false, true, true, SingleSpc, 4, 2 ,true},
399 { ARM::VST4d8Pseudo, ARM::VST4d8, false, false, false, SingleSpc, 4, 8 ,true},
400 { ARM::VST4d8Pseudo_UPD, ARM::VST4d8_UPD, false, true, true, SingleSpc, 4, 8 ,true},
401 
402 { ARM::VST4q16Pseudo_UPD, ARM::VST4q16_UPD, false, true, true, EvenDblSpc, 4, 4 ,true},
403 { ARM::VST4q16oddPseudo, ARM::VST4q16, false, false, false, OddDblSpc, 4, 4 ,true},
404 { ARM::VST4q16oddPseudo_UPD, ARM::VST4q16_UPD, false, true, true, OddDblSpc, 4, 4 ,true},
405 { ARM::VST4q32Pseudo_UPD, ARM::VST4q32_UPD, false, true, true, EvenDblSpc, 4, 2 ,true},
406 { ARM::VST4q32oddPseudo, ARM::VST4q32, false, false, false, OddDblSpc, 4, 2 ,true},
407 { ARM::VST4q32oddPseudo_UPD, ARM::VST4q32_UPD, false, true, true, OddDblSpc, 4, 2 ,true},
408 { ARM::VST4q8Pseudo_UPD, ARM::VST4q8_UPD, false, true, true, EvenDblSpc, 4, 8 ,true},
409 { ARM::VST4q8oddPseudo, ARM::VST4q8, false, false, false, OddDblSpc, 4, 8 ,true},
410 { ARM::VST4q8oddPseudo_UPD, ARM::VST4q8_UPD, false, true, true, OddDblSpc, 4, 8 ,true}
411 };
412 
413 /// LookupNEONLdSt - Search the NEONLdStTable for information about a NEON
414 /// load or store pseudo instruction.
415 static const NEONLdStTableEntry *LookupNEONLdSt(unsigned Opcode) {
416 #ifndef NDEBUG
417  // Make sure the table is sorted.
418  static std::atomic<bool> TableChecked(false);
419  if (!TableChecked.load(std::memory_order_relaxed)) {
420  assert(std::is_sorted(std::begin(NEONLdStTable), std::end(NEONLdStTable)) &&
421  "NEONLdStTable is not sorted!");
422  TableChecked.store(true, std::memory_order_relaxed);
423  }
424 #endif
425 
426  auto I = llvm::lower_bound(NEONLdStTable, Opcode);
427  if (I != std::end(NEONLdStTable) && I->PseudoOpc == Opcode)
428  return I;
429  return nullptr;
430 }
431 
432 /// GetDSubRegs - Get 4 D subregisters of a Q, QQ, or QQQQ register,
433 /// corresponding to the specified register spacing. Not all of the results
434 /// are necessarily valid, e.g., a Q register only has 2 D subregisters.
435 static void GetDSubRegs(unsigned Reg, NEONRegSpacing RegSpc,
436  const TargetRegisterInfo *TRI, unsigned &D0,
437  unsigned &D1, unsigned &D2, unsigned &D3) {
438  if (RegSpc == SingleSpc || RegSpc == SingleLowSpc) {
439  D0 = TRI->getSubReg(Reg, ARM::dsub_0);
440  D1 = TRI->getSubReg(Reg, ARM::dsub_1);
441  D2 = TRI->getSubReg(Reg, ARM::dsub_2);
442  D3 = TRI->getSubReg(Reg, ARM::dsub_3);
443  } else if (RegSpc == SingleHighQSpc) {
444  D0 = TRI->getSubReg(Reg, ARM::dsub_4);
445  D1 = TRI->getSubReg(Reg, ARM::dsub_5);
446  D2 = TRI->getSubReg(Reg, ARM::dsub_6);
447  D3 = TRI->getSubReg(Reg, ARM::dsub_7);
448  } else if (RegSpc == SingleHighTSpc) {
449  D0 = TRI->getSubReg(Reg, ARM::dsub_3);
450  D1 = TRI->getSubReg(Reg, ARM::dsub_4);
451  D2 = TRI->getSubReg(Reg, ARM::dsub_5);
452  D3 = TRI->getSubReg(Reg, ARM::dsub_6);
453  } else if (RegSpc == EvenDblSpc) {
454  D0 = TRI->getSubReg(Reg, ARM::dsub_0);
455  D1 = TRI->getSubReg(Reg, ARM::dsub_2);
456  D2 = TRI->getSubReg(Reg, ARM::dsub_4);
457  D3 = TRI->getSubReg(Reg, ARM::dsub_6);
458  } else {
459  assert(RegSpc == OddDblSpc && "unknown register spacing");
460  D0 = TRI->getSubReg(Reg, ARM::dsub_1);
461  D1 = TRI->getSubReg(Reg, ARM::dsub_3);
462  D2 = TRI->getSubReg(Reg, ARM::dsub_5);
463  D3 = TRI->getSubReg(Reg, ARM::dsub_7);
464  }
465 }
466 
467 /// ExpandVLD - Translate VLD pseudo instructions with Q, QQ or QQQQ register
468 /// operands to real VLD instructions with D register operands.
469 void ARMExpandPseudo::ExpandVLD(MachineBasicBlock::iterator &MBBI) {
470  MachineInstr &MI = *MBBI;
471  MachineBasicBlock &MBB = *MI.getParent();
472  LLVM_DEBUG(dbgs() << "Expanding: "; MI.dump());
473 
474  const NEONLdStTableEntry *TableEntry = LookupNEONLdSt(MI.getOpcode());
475  assert(TableEntry && TableEntry->IsLoad && "NEONLdStTable lookup failed");
476  NEONRegSpacing RegSpc = (NEONRegSpacing)TableEntry->RegSpacing;
477  unsigned NumRegs = TableEntry->NumRegs;
478 
479  MachineInstrBuilder MIB = BuildMI(MBB, MBBI, MI.getDebugLoc(),
480  TII->get(TableEntry->RealOpc));
481  unsigned OpIdx = 0;
482 
483  bool DstIsDead = MI.getOperand(OpIdx).isDead();
484  Register DstReg = MI.getOperand(OpIdx++).getReg();
485  if(TableEntry->RealOpc == ARM::VLD2DUPd8x2 ||
486  TableEntry->RealOpc == ARM::VLD2DUPd16x2 ||
487  TableEntry->RealOpc == ARM::VLD2DUPd32x2) {
488  unsigned SubRegIndex;
489  if (RegSpc == EvenDblSpc) {
490  SubRegIndex = ARM::dsub_0;
491  } else {
492  assert(RegSpc == OddDblSpc && "Unexpected spacing!");
493  SubRegIndex = ARM::dsub_1;
494  }
495  Register SubReg = TRI->getSubReg(DstReg, SubRegIndex);
496  unsigned DstRegPair = TRI->getMatchingSuperReg(SubReg, ARM::dsub_0,
497  &ARM::DPairSpcRegClass);
498  MIB.addReg(DstRegPair, RegState::Define | getDeadRegState(DstIsDead));
499  } else {
500  unsigned D0, D1, D2, D3;
501  GetDSubRegs(DstReg, RegSpc, TRI, D0, D1, D2, D3);
502  MIB.addReg(D0, RegState::Define | getDeadRegState(DstIsDead));
503  if (NumRegs > 1 && TableEntry->copyAllListRegs)
504  MIB.addReg(D1, RegState::Define | getDeadRegState(DstIsDead));
505  if (NumRegs > 2 && TableEntry->copyAllListRegs)
506  MIB.addReg(D2, RegState::Define | getDeadRegState(DstIsDead));
507  if (NumRegs > 3 && TableEntry->copyAllListRegs)
508  MIB.addReg(D3, RegState::Define | getDeadRegState(DstIsDead));
509  }
510 
511  if (TableEntry->isUpdating)
512  MIB.add(MI.getOperand(OpIdx++));
513 
514  // Copy the addrmode6 operands.
515  MIB.add(MI.getOperand(OpIdx++));
516  MIB.add(MI.getOperand(OpIdx++));
517 
518  // Copy the am6offset operand.
519  if (TableEntry->hasWritebackOperand) {
520  // TODO: The writing-back pseudo instructions we translate here are all
521  // defined to take am6offset nodes that are capable to represent both fixed
522  // and register forms. Some real instructions, however, do not rely on
523  // am6offset and have separate definitions for such forms. When this is the
524  // case, fixed forms do not take any offset nodes, so here we skip them for
525  // such instructions. Once all real and pseudo writing-back instructions are
526  // rewritten without use of am6offset nodes, this code will go away.
527  const MachineOperand &AM6Offset = MI.getOperand(OpIdx++);
528  if (TableEntry->RealOpc == ARM::VLD1d8Qwb_fixed ||
529  TableEntry->RealOpc == ARM::VLD1d16Qwb_fixed ||
530  TableEntry->RealOpc == ARM::VLD1d32Qwb_fixed ||
531  TableEntry->RealOpc == ARM::VLD1d64Qwb_fixed ||
532  TableEntry->RealOpc == ARM::VLD1d8Twb_fixed ||
533  TableEntry->RealOpc == ARM::VLD1d16Twb_fixed ||
534  TableEntry->RealOpc == ARM::VLD1d32Twb_fixed ||
535  TableEntry->RealOpc == ARM::VLD1d64Twb_fixed) {
536  assert(AM6Offset.getReg() == 0 &&
537  "A fixed writing-back pseudo instruction provides an offset "
538  "register!");
539  } else {
540  MIB.add(AM6Offset);
541  }
542  }
543 
544  // For an instruction writing double-spaced subregs, the pseudo instruction
545  // has an extra operand that is a use of the super-register. Record the
546  // operand index and skip over it.
547  unsigned SrcOpIdx = 0;
548  if(TableEntry->RealOpc != ARM::VLD2DUPd8x2 &&
549  TableEntry->RealOpc != ARM::VLD2DUPd16x2 &&
550  TableEntry->RealOpc != ARM::VLD2DUPd32x2) {
551  if (RegSpc == EvenDblSpc || RegSpc == OddDblSpc ||
552  RegSpc == SingleLowSpc || RegSpc == SingleHighQSpc ||
553  RegSpc == SingleHighTSpc)
554  SrcOpIdx = OpIdx++;
555  }
556 
557  // Copy the predicate operands.
558  MIB.add(MI.getOperand(OpIdx++));
559  MIB.add(MI.getOperand(OpIdx++));
560 
561  // Copy the super-register source operand used for double-spaced subregs over
562  // to the new instruction as an implicit operand.
563  if (SrcOpIdx != 0) {
564  MachineOperand MO = MI.getOperand(SrcOpIdx);
565  MO.setImplicit(true);
566  MIB.add(MO);
567  }
568  // Add an implicit def for the super-register.
569  MIB.addReg(DstReg, RegState::ImplicitDefine | getDeadRegState(DstIsDead));
570  TransferImpOps(MI, MIB, MIB);
571 
572  // Transfer memoperands.
573  MIB.cloneMemRefs(MI);
574  MI.eraseFromParent();
575  LLVM_DEBUG(dbgs() << "To: "; MIB.getInstr()->dump(););
576 }
577 
578 /// ExpandVST - Translate VST pseudo instructions with Q, QQ or QQQQ register
579 /// operands to real VST instructions with D register operands.
580 void ARMExpandPseudo::ExpandVST(MachineBasicBlock::iterator &MBBI) {
581  MachineInstr &MI = *MBBI;
582  MachineBasicBlock &MBB = *MI.getParent();
583  LLVM_DEBUG(dbgs() << "Expanding: "; MI.dump());
584 
585  const NEONLdStTableEntry *TableEntry = LookupNEONLdSt(MI.getOpcode());
586  assert(TableEntry && !TableEntry->IsLoad && "NEONLdStTable lookup failed");
587  NEONRegSpacing RegSpc = (NEONRegSpacing)TableEntry->RegSpacing;
588  unsigned NumRegs = TableEntry->NumRegs;
589 
590  MachineInstrBuilder MIB = BuildMI(MBB, MBBI, MI.getDebugLoc(),
591  TII->get(TableEntry->RealOpc));
592  unsigned OpIdx = 0;
593  if (TableEntry->isUpdating)
594  MIB.add(MI.getOperand(OpIdx++));
595 
596  // Copy the addrmode6 operands.
597  MIB.add(MI.getOperand(OpIdx++));
598  MIB.add(MI.getOperand(OpIdx++));
599 
600  if (TableEntry->hasWritebackOperand) {
601  // TODO: The writing-back pseudo instructions we translate here are all
602  // defined to take am6offset nodes that are capable to represent both fixed
603  // and register forms. Some real instructions, however, do not rely on
604  // am6offset and have separate definitions for such forms. When this is the
605  // case, fixed forms do not take any offset nodes, so here we skip them for
606  // such instructions. Once all real and pseudo writing-back instructions are
607  // rewritten without use of am6offset nodes, this code will go away.
608  const MachineOperand &AM6Offset = MI.getOperand(OpIdx++);
609  if (TableEntry->RealOpc == ARM::VST1d8Qwb_fixed ||
610  TableEntry->RealOpc == ARM::VST1d16Qwb_fixed ||
611  TableEntry->RealOpc == ARM::VST1d32Qwb_fixed ||
612  TableEntry->RealOpc == ARM::VST1d64Qwb_fixed ||
613  TableEntry->RealOpc == ARM::VST1d8Twb_fixed ||
614  TableEntry->RealOpc == ARM::VST1d16Twb_fixed ||
615  TableEntry->RealOpc == ARM::VST1d32Twb_fixed ||
616  TableEntry->RealOpc == ARM::VST1d64Twb_fixed) {
617  assert(AM6Offset.getReg() == 0 &&
618  "A fixed writing-back pseudo instruction provides an offset "
619  "register!");
620  } else {
621  MIB.add(AM6Offset);
622  }
623  }
624 
625  bool SrcIsKill = MI.getOperand(OpIdx).isKill();
626  bool SrcIsUndef = MI.getOperand(OpIdx).isUndef();
627  Register SrcReg = MI.getOperand(OpIdx++).getReg();
628  unsigned D0, D1, D2, D3;
629  GetDSubRegs(SrcReg, RegSpc, TRI, D0, D1, D2, D3);
630  MIB.addReg(D0, getUndefRegState(SrcIsUndef));
631  if (NumRegs > 1 && TableEntry->copyAllListRegs)
632  MIB.addReg(D1, getUndefRegState(SrcIsUndef));
633  if (NumRegs > 2 && TableEntry->copyAllListRegs)
634  MIB.addReg(D2, getUndefRegState(SrcIsUndef));
635  if (NumRegs > 3 && TableEntry->copyAllListRegs)
636  MIB.addReg(D3, getUndefRegState(SrcIsUndef));
637 
638  // Copy the predicate operands.
639  MIB.add(MI.getOperand(OpIdx++));
640  MIB.add(MI.getOperand(OpIdx++));
641 
642  if (SrcIsKill && !SrcIsUndef) // Add an implicit kill for the super-reg.
643  MIB->addRegisterKilled(SrcReg, TRI, true);
644  else if (!SrcIsUndef)
645  MIB.addReg(SrcReg, RegState::Implicit); // Add implicit uses for src reg.
646  TransferImpOps(MI, MIB, MIB);
647 
648  // Transfer memoperands.
649  MIB.cloneMemRefs(MI);
650  MI.eraseFromParent();
651  LLVM_DEBUG(dbgs() << "To: "; MIB.getInstr()->dump(););
652 }
653 
654 /// ExpandLaneOp - Translate VLD*LN and VST*LN instructions with Q, QQ or QQQQ
655 /// register operands to real instructions with D register operands.
656 void ARMExpandPseudo::ExpandLaneOp(MachineBasicBlock::iterator &MBBI) {
657  MachineInstr &MI = *MBBI;
658  MachineBasicBlock &MBB = *MI.getParent();
659  LLVM_DEBUG(dbgs() << "Expanding: "; MI.dump());
660 
661  const NEONLdStTableEntry *TableEntry = LookupNEONLdSt(MI.getOpcode());
662  assert(TableEntry && "NEONLdStTable lookup failed");
663  NEONRegSpacing RegSpc = (NEONRegSpacing)TableEntry->RegSpacing;
664  unsigned NumRegs = TableEntry->NumRegs;
665  unsigned RegElts = TableEntry->RegElts;
666 
667  MachineInstrBuilder MIB = BuildMI(MBB, MBBI, MI.getDebugLoc(),
668  TII->get(TableEntry->RealOpc));
669  unsigned OpIdx = 0;
670  // The lane operand is always the 3rd from last operand, before the 2
671  // predicate operands.
672  unsigned Lane = MI.getOperand(MI.getDesc().getNumOperands() - 3).getImm();
673 
674  // Adjust the lane and spacing as needed for Q registers.
675  assert(RegSpc != OddDblSpc && "unexpected register spacing for VLD/VST-lane");
676  if (RegSpc == EvenDblSpc && Lane >= RegElts) {
677  RegSpc = OddDblSpc;
678  Lane -= RegElts;
679  }
680  assert(Lane < RegElts && "out of range lane for VLD/VST-lane");
681 
682  unsigned D0 = 0, D1 = 0, D2 = 0, D3 = 0;
683  unsigned DstReg = 0;
684  bool DstIsDead = false;
685  if (TableEntry->IsLoad) {
686  DstIsDead = MI.getOperand(OpIdx).isDead();
687  DstReg = MI.getOperand(OpIdx++).getReg();
688  GetDSubRegs(DstReg, RegSpc, TRI, D0, D1, D2, D3);
689  MIB.addReg(D0, RegState::Define | getDeadRegState(DstIsDead));
690  if (NumRegs > 1)
691  MIB.addReg(D1, RegState::Define | getDeadRegState(DstIsDead));
692  if (NumRegs > 2)
693  MIB.addReg(D2, RegState::Define | getDeadRegState(DstIsDead));
694  if (NumRegs > 3)
695  MIB.addReg(D3, RegState::Define | getDeadRegState(DstIsDead));
696  }
697 
698  if (TableEntry->isUpdating)
699  MIB.add(MI.getOperand(OpIdx++));
700 
701  // Copy the addrmode6 operands.
702  MIB.add(MI.getOperand(OpIdx++));
703  MIB.add(MI.getOperand(OpIdx++));
704  // Copy the am6offset operand.
705  if (TableEntry->hasWritebackOperand)
706  MIB.add(MI.getOperand(OpIdx++));
707 
708  // Grab the super-register source.
709  MachineOperand MO = MI.getOperand(OpIdx++);
710  if (!TableEntry->IsLoad)
711  GetDSubRegs(MO.getReg(), RegSpc, TRI, D0, D1, D2, D3);
712 
713  // Add the subregs as sources of the new instruction.
714  unsigned SrcFlags = (getUndefRegState(MO.isUndef()) |
715  getKillRegState(MO.isKill()));
716  MIB.addReg(D0, SrcFlags);
717  if (NumRegs > 1)
718  MIB.addReg(D1, SrcFlags);
719  if (NumRegs > 2)
720  MIB.addReg(D2, SrcFlags);
721  if (NumRegs > 3)
722  MIB.addReg(D3, SrcFlags);
723 
724  // Add the lane number operand.
725  MIB.addImm(Lane);
726  OpIdx += 1;
727 
728  // Copy the predicate operands.
729  MIB.add(MI.getOperand(OpIdx++));
730  MIB.add(MI.getOperand(OpIdx++));
731 
732  // Copy the super-register source to be an implicit source.
733  MO.setImplicit(true);
734  MIB.add(MO);
735  if (TableEntry->IsLoad)
736  // Add an implicit def for the super-register.
737  MIB.addReg(DstReg, RegState::ImplicitDefine | getDeadRegState(DstIsDead));
738  TransferImpOps(MI, MIB, MIB);
739  // Transfer memoperands.
740  MIB.cloneMemRefs(MI);
741  MI.eraseFromParent();
742 }
743 
744 /// ExpandVTBL - Translate VTBL and VTBX pseudo instructions with Q or QQ
745 /// register operands to real instructions with D register operands.
746 void ARMExpandPseudo::ExpandVTBL(MachineBasicBlock::iterator &MBBI,
747  unsigned Opc, bool IsExt) {
748  MachineInstr &MI = *MBBI;
749  MachineBasicBlock &MBB = *MI.getParent();
750  LLVM_DEBUG(dbgs() << "Expanding: "; MI.dump());
751 
752  MachineInstrBuilder MIB = BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(Opc));
753  unsigned OpIdx = 0;
754 
755  // Transfer the destination register operand.
756  MIB.add(MI.getOperand(OpIdx++));
757  if (IsExt) {
758  MachineOperand VdSrc(MI.getOperand(OpIdx++));
759  MIB.add(VdSrc);
760  }
761 
762  bool SrcIsKill = MI.getOperand(OpIdx).isKill();
763  Register SrcReg = MI.getOperand(OpIdx++).getReg();
764  unsigned D0, D1, D2, D3;
765  GetDSubRegs(SrcReg, SingleSpc, TRI, D0, D1, D2, D3);
766  MIB.addReg(D0);
767 
768  // Copy the other source register operand.
769  MachineOperand VmSrc(MI.getOperand(OpIdx++));
770  MIB.add(VmSrc);
771 
772  // Copy the predicate operands.
773  MIB.add(MI.getOperand(OpIdx++));
774  MIB.add(MI.getOperand(OpIdx++));
775 
776  // Add an implicit kill and use for the super-reg.
777  MIB.addReg(SrcReg, RegState::Implicit | getKillRegState(SrcIsKill));
778  TransferImpOps(MI, MIB, MIB);
779  MI.eraseFromParent();
780  LLVM_DEBUG(dbgs() << "To: "; MIB.getInstr()->dump(););
781 }
782 
783 static bool IsAnAddressOperand(const MachineOperand &MO) {
784  // This check is overly conservative. Unless we are certain that the machine
785  // operand is not a symbol reference, we return that it is a symbol reference.
786  // This is important as the load pair may not be split up Windows.
787  switch (MO.getType()) {
788  case MachineOperand::MO_Register:
789  case MachineOperand::MO_Immediate:
790  case MachineOperand::MO_CImmediate:
791  case MachineOperand::MO_FPImmediate:
792  case MachineOperand::MO_ShuffleMask:
793  return false;
794  case MachineOperand::MO_MachineBasicBlock:
795  return true;
796  case MachineOperand::MO_FrameIndex:
797  return false;
798  case MachineOperand::MO_ConstantPoolIndex:
799  case MachineOperand::MO_TargetIndex:
800  case MachineOperand::MO_JumpTableIndex:
801  case MachineOperand::MO_ExternalSymbol:
802  case MachineOperand::MO_GlobalAddress:
803  case MachineOperand::MO_BlockAddress:
804  return true;
805  case MachineOperand::MO_RegisterMask:
806  case MachineOperand::MO_RegisterLiveOut:
807  return false;
808  case MachineOperand::MO_Metadata:
809  case MachineOperand::MO_MCSymbol:
810  return true;
811  case MachineOperand::MO_CFIIndex:
812  return false;
813  case MachineOperand::MO_IntrinsicID:
814  case MachineOperand::MO_Predicate:
815  llvm_unreachable("should not exist post-isel");
816  }
817  llvm_unreachable("unhandled machine operand type");
818 }
819 
820 static MachineOperand makeImplicit(const MachineOperand &MO) {
821  MachineOperand NewMO = MO;
822  NewMO.setImplicit();
823  return NewMO;
824 }
825 
826 void ARMExpandPseudo::ExpandMOV32BitImm(MachineBasicBlock &MBB,
827  MachineBasicBlock::iterator &MBBI) {
828  MachineInstr &MI = *MBBI;
829  unsigned Opcode = MI.getOpcode();
830  unsigned PredReg = 0;
831  ARMCC::CondCodes Pred = getInstrPredicate(MI, PredReg);
832  Register DstReg = MI.getOperand(0).getReg();
833  bool DstIsDead = MI.getOperand(0).isDead();
834  bool isCC = Opcode == ARM::MOVCCi32imm || Opcode == ARM::t2MOVCCi32imm;
835  const MachineOperand &MO = MI.getOperand(isCC ? 2 : 1);
836  bool RequiresBundling = STI->isTargetWindows() && IsAnAddressOperand(MO);
837  MachineInstrBuilder LO16, HI16;
838  LLVM_DEBUG(dbgs() << "Expanding: "; MI.dump());
839 
840  if (!STI->hasV6T2Ops() &&
841  (Opcode == ARM::MOVi32imm || Opcode == ARM::MOVCCi32imm)) {
842  // FIXME Windows CE supports older ARM CPUs
843  assert(!STI->isTargetWindows() && "Windows on ARM requires ARMv7+");
844 
845  // Expand into a movi + orr.
846  LO16 = BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(ARM::MOVi), DstReg);
847  HI16 = BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(ARM::ORRri))
848  .addReg(DstReg, RegState::Define | getDeadRegState(DstIsDead))
849  .addReg(DstReg);
850 
851  assert (MO.isImm() && "MOVi32imm w/ non-immediate source operand!");
852  unsigned ImmVal = (unsigned)MO.getImm();
853  unsigned SOImmValV1 = ARM_AM::getSOImmTwoPartFirst(ImmVal);
854  unsigned SOImmValV2 = ARM_AM::getSOImmTwoPartSecond(ImmVal);
855  LO16 = LO16.addImm(SOImmValV1);
856  HI16 = HI16.addImm(SOImmValV2);
857  LO16.cloneMemRefs(MI);
858  HI16.cloneMemRefs(MI);
859  LO16.addImm(Pred).addReg(PredReg).add(condCodeOp());
860  HI16.addImm(Pred).addReg(PredReg).add(condCodeOp());
861  if (isCC)
862  LO16.add(makeImplicit(MI.getOperand(1)));
863  TransferImpOps(MI, LO16, HI16);
864  MI.eraseFromParent();
865  return;
866  }
867 
868  unsigned LO16Opc = 0;
869  unsigned HI16Opc = 0;
870  if (Opcode == ARM::t2MOVi32imm || Opcode == ARM::t2MOVCCi32imm) {
871  LO16Opc = ARM::t2MOVi16;
872  HI16Opc = ARM::t2MOVTi16;
873  } else {
874  LO16Opc = ARM::MOVi16;
875  HI16Opc = ARM::MOVTi16;
876  }
877 
878  LO16 = BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(LO16Opc), DstReg);
879  HI16 = BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(HI16Opc))
880  .addReg(DstReg, RegState::Define | getDeadRegState(DstIsDead))
881  .addReg(DstReg);
882 
883  switch (MO.getType()) {
884  case MachineOperand::MO_Immediate: {
885  unsigned Imm = MO.getImm();
886  unsigned Lo16 = Imm & 0xffff;
887  unsigned Hi16 = (Imm >> 16) & 0xffff;
888  LO16 = LO16.addImm(Lo16);
889  HI16 = HI16.addImm(Hi16);
890  break;
891  }
892  case MachineOperand::MO_ExternalSymbol: {
893  const char *ES = MO.getSymbolName();
894  unsigned TF = MO.getTargetFlags();
895  LO16 = LO16.addExternalSymbol(ES, TF | ARMII::MO_LO16);
896  HI16 = HI16.addExternalSymbol(ES, TF | ARMII::MO_HI16);
897  break;
898  }
899  default: {
900  const GlobalValue *GV = MO.getGlobal();
901  unsigned TF = MO.getTargetFlags();
902  LO16 = LO16.addGlobalAddress(GV, MO.getOffset(), TF | ARMII::MO_LO16);
903  HI16 = HI16.addGlobalAddress(GV, MO.getOffset(), TF | ARMII::MO_HI16);
904  break;
905  }
906  }
907 
908  LO16.cloneMemRefs(MI);
909  HI16.cloneMemRefs(MI);
910  LO16.addImm(Pred).addReg(PredReg);
911  HI16.addImm(Pred).addReg(PredReg);
912 
913  if (RequiresBundling)
914  finalizeBundle(MBB, LO16->getIterator(), MBBI->getIterator());
915 
916  if (isCC)
917  LO16.add(makeImplicit(MI.getOperand(1)));
918  TransferImpOps(MI, LO16, HI16);
919  MI.eraseFromParent();
920  LLVM_DEBUG(dbgs() << "To: "; LO16.getInstr()->dump(););
921  LLVM_DEBUG(dbgs() << "And: "; HI16.getInstr()->dump(););
922 }
923 
924 /// Expand a CMP_SWAP pseudo-inst to an ldrex/strex loop as simply as
925 /// possible. This only gets used at -O0 so we don't care about efficiency of
926 /// the generated code.
927 bool ARMExpandPseudo::ExpandCMP_SWAP(MachineBasicBlock &MBB,
928  MachineBasicBlock::iterator MBBI,
929  unsigned LdrexOp, unsigned StrexOp,
930  unsigned UxtOp,
931  MachineBasicBlock::iterator &NextMBBI) {
932  bool IsThumb = STI->isThumb();
933  MachineInstr &MI = *MBBI;
934  DebugLoc DL = MI.getDebugLoc();
935  const MachineOperand &Dest = MI.getOperand(0);
936  Register TempReg = MI.getOperand(1).getReg();
937  // Duplicating undef operands into 2 instructions does not guarantee the same
938  // value on both; However undef should be replaced by xzr anyway.
939  assert(!MI.getOperand(2).isUndef() && "cannot handle undef");
940  Register AddrReg = MI.getOperand(2).getReg();
941  Register DesiredReg = MI.getOperand(3).getReg();
942  Register NewReg = MI.getOperand(4).getReg();
943 
944  MachineFunction *MF = MBB.getParent();
945  auto LoadCmpBB = MF->CreateMachineBasicBlock(MBB.getBasicBlock());
946  auto StoreBB = MF->CreateMachineBasicBlock(MBB.getBasicBlock());
947  auto DoneBB = MF->CreateMachineBasicBlock(MBB.getBasicBlock());
948 
949  MF->insert(++MBB.getIterator(), LoadCmpBB);
950  MF->insert(++LoadCmpBB->getIterator(), StoreBB);
951  MF->insert(++StoreBB->getIterator(), DoneBB);
952 
953  if (UxtOp) {
954  MachineInstrBuilder MIB =
955  BuildMI(MBB, MBBI, DL, TII->get(UxtOp), DesiredReg)
956  .addReg(DesiredReg, RegState::Kill);
957  if (!IsThumb)
958  MIB.addImm(0);
959  MIB.add(predOps(ARMCC::AL));
960  }
961 
962  // .Lloadcmp:
963  // ldrex rDest, [rAddr]
964  // cmp rDest, rDesired
965  // bne .Ldone
966 
967  MachineInstrBuilder MIB;
968  MIB = BuildMI(LoadCmpBB, DL, TII->get(LdrexOp), Dest.getReg());
969  MIB.addReg(AddrReg);
970  if (LdrexOp == ARM::t2LDREX)
971  MIB.addImm(0); // a 32-bit Thumb ldrex (only) allows an offset.
972  MIB.add(predOps(ARMCC::AL));
973 
974  unsigned CMPrr = IsThumb ? ARM::tCMPhir : ARM::CMPrr;
975  BuildMI(LoadCmpBB, DL, TII->get(CMPrr))
976  .addReg(Dest.getReg(), getKillRegState(Dest.isDead()))
977  .addReg(DesiredReg)
978  .add(predOps(ARMCC::AL));
979  unsigned Bcc = IsThumb ? ARM::tBcc : ARM::Bcc;
980  BuildMI(LoadCmpBB, DL, TII->get(Bcc))
981  .addMBB(DoneBB)
982  .addImm(ARMCC::NE)
983  .addReg(ARM::CPSR, RegState::Kill);
984  LoadCmpBB->addSuccessor(DoneBB);
985  LoadCmpBB->addSuccessor(StoreBB);
986 
987  // .Lstore:
988  // strex rTempReg, rNew, [rAddr]
989  // cmp rTempReg, #0
990  // bne .Lloadcmp
991  MIB = BuildMI(StoreBB, DL, TII->get(StrexOp), TempReg)
992  .addReg(NewReg)
993  .addReg(AddrReg);
994  if (StrexOp == ARM::t2STREX)
995  MIB.addImm(0); // a 32-bit Thumb strex (only) allows an offset.
996  MIB.add(predOps(ARMCC::AL));
997 
998  unsigned CMPri = IsThumb ? ARM::t2CMPri : ARM::CMPri;
999  BuildMI(StoreBB, DL, TII->get(CMPri))
1000  .addReg(TempReg, RegState::Kill)
1001  .addImm(0)
1002  .add(predOps(ARMCC::AL));
1003  BuildMI(StoreBB, DL, TII->get(Bcc))
1004  .addMBB(LoadCmpBB)
1005  .addImm(ARMCC::NE)
1006  .addReg(ARM::CPSR, RegState::Kill);
1007  StoreBB->addSuccessor(LoadCmpBB);
1008  StoreBB->addSuccessor(DoneBB);
1009 
1010  DoneBB->splice(DoneBB->end(), &MBB, MI, MBB.end());
1011  DoneBB->transferSuccessors(&MBB);
1012 
1013  MBB.addSuccessor(LoadCmpBB);
1014 
1015  NextMBBI = MBB.end();
1016  MI.eraseFromParent();
1017 
1018  // Recompute livein lists.
1019  LivePhysRegs LiveRegs;
1020  computeAndAddLiveIns(LiveRegs, *DoneBB);
1021  computeAndAddLiveIns(LiveRegs, *StoreBB);
1022  computeAndAddLiveIns(LiveRegs, *LoadCmpBB);
1023  // Do an extra pass around the loop to get loop carried registers right.
1024  StoreBB->clearLiveIns();
1025  computeAndAddLiveIns(LiveRegs, *StoreBB);
1026  LoadCmpBB->clearLiveIns();
1027  computeAndAddLiveIns(LiveRegs, *LoadCmpBB);
1028 
1029  return true;
1030 }
1031 
1032 /// ARM's ldrexd/strexd take a consecutive register pair (represented as a
1033 /// single GPRPair register), Thumb's take two separate registers so we need to
1034 /// extract the subregs from the pair.
1035 static void addExclusiveRegPair(MachineInstrBuilder &MIB, MachineOperand &Reg,
1036  unsigned Flags, bool IsThumb,
1037  const TargetRegisterInfo *TRI) {
1038  if (IsThumb) {
1039  Register RegLo = TRI->getSubReg(Reg.getReg(), ARM::gsub_0);
1040  Register RegHi = TRI->getSubReg(Reg.getReg(), ARM::gsub_1);
1041  MIB.addReg(RegLo, Flags);
1042  MIB.addReg(RegHi, Flags);
1043  } else
1044  MIB.addReg(Reg.getReg(), Flags);
1045 }
1046 
1047 /// Expand a 64-bit CMP_SWAP to an ldrexd/strexd loop.
1048 bool ARMExpandPseudo::ExpandCMP_SWAP_64(MachineBasicBlock &MBB,
1049  MachineBasicBlock::iterator MBBI,
1050  MachineBasicBlock::iterator &NextMBBI) {
1051  bool IsThumb = STI->isThumb();
1052  MachineInstr &MI = *MBBI;
1053  DebugLoc DL = MI.getDebugLoc();
1054  MachineOperand &Dest = MI.getOperand(0);
1055  Register TempReg = MI.getOperand(1).getReg();
1056  // Duplicating undef operands into 2 instructions does not guarantee the same
1057  // value on both; However undef should be replaced by xzr anyway.
1058  assert(!MI.getOperand(2).isUndef() && "cannot handle undef");
1059  Register AddrReg = MI.getOperand(2).getReg();
1060  Register DesiredReg = MI.getOperand(3).getReg();
1061  MachineOperand New = MI.getOperand(4);
1062  New.setIsKill(false);
1063 
1064  Register DestLo = TRI->getSubReg(Dest.getReg(), ARM::gsub_0);
1065  Register DestHi = TRI->getSubReg(Dest.getReg(), ARM::gsub_1);
1066  Register DesiredLo = TRI->getSubReg(DesiredReg, ARM::gsub_0);
1067  Register DesiredHi = TRI->getSubReg(DesiredReg, ARM::gsub_1);
1068 
1069  MachineFunction *MF = MBB.getParent();
1070  auto LoadCmpBB = MF->CreateMachineBasicBlock(MBB.getBasicBlock());
1071  auto StoreBB = MF->CreateMachineBasicBlock(MBB.getBasicBlock());
1072  auto DoneBB = MF->CreateMachineBasicBlock(MBB.getBasicBlock());
1073 
1074  MF->insert(++MBB.getIterator(), LoadCmpBB);
1075  MF->insert(++LoadCmpBB->getIterator(), StoreBB);
1076  MF->insert(++StoreBB->getIterator(), DoneBB);
1077 
1078  // .Lloadcmp:
1079  // ldrexd rDestLo, rDestHi, [rAddr]
1080  // cmp rDestLo, rDesiredLo
1081  // sbcs dead rTempReg, rDestHi, rDesiredHi
1082  // bne .Ldone
1083  unsigned LDREXD = IsThumb ? ARM::t2LDREXD : ARM::LDREXD;
1084  MachineInstrBuilder MIB;
1085  MIB = BuildMI(LoadCmpBB, DL, TII->get(LDREXD));
1086  addExclusiveRegPair(MIB, Dest, RegState::Define, IsThumb, TRI);
1087  MIB.addReg(AddrReg).add(predOps(ARMCC::AL));
1088 
1089  unsigned CMPrr = IsThumb ? ARM::tCMPhir : ARM::CMPrr;
1090  BuildMI(LoadCmpBB, DL, TII->get(CMPrr))
1091  .addReg(DestLo, getKillRegState(Dest.isDead()))
1092  .addReg(DesiredLo)
1093  .add(predOps(ARMCC::AL));
1094 
1095  BuildMI(LoadCmpBB, DL, TII->get(CMPrr))
1096  .addReg(DestHi, getKillRegState(Dest.isDead()))
1097  .addReg(DesiredHi)
1098  .addImm(ARMCC::EQ).addReg(ARM::CPSR, RegState::Kill);
1099 
1100  unsigned Bcc = IsThumb ? ARM::tBcc : ARM::Bcc;
1101  BuildMI(LoadCmpBB, DL, TII->get(Bcc))
1102  .addMBB(DoneBB)
1103  .addImm(ARMCC::NE)
1104  .addReg(ARM::CPSR, RegState::Kill);
1105  LoadCmpBB->addSuccessor(DoneBB);
1106  LoadCmpBB->addSuccessor(StoreBB);
1107 
1108  // .Lstore:
1109  // strexd rTempReg, rNewLo, rNewHi, [rAddr]
1110  // cmp rTempReg, #0
1111  // bne .Lloadcmp
1112  unsigned STREXD = IsThumb ? ARM::t2STREXD : ARM::STREXD;
1113  MIB = BuildMI(StoreBB, DL, TII->get(STREXD), TempReg);
1114  unsigned Flags = getKillRegState(New.isDead());
1115  addExclusiveRegPair(MIB, New, Flags, IsThumb, TRI);
1116  MIB.addReg(AddrReg).add(predOps(ARMCC::AL));
1117 
1118  unsigned CMPri = IsThumb ? ARM::t2CMPri : ARM::CMPri;
1119  BuildMI(StoreBB, DL, TII->get(CMPri))
1120  .addReg(TempReg, RegState::Kill)
1121  .addImm(0)
1122  .add(predOps(ARMCC::AL));
1123  BuildMI(StoreBB, DL, TII->get(Bcc))
1124  .addMBB(LoadCmpBB)
1125  .addImm(ARMCC::NE)
1126  .addReg(ARM::CPSR, RegState::Kill);
1127  StoreBB->addSuccessor(LoadCmpBB);
1128  StoreBB->addSuccessor(DoneBB);
1129 
1130  DoneBB->splice(DoneBB->end(), &MBB, MI, MBB.end());
1131  DoneBB->transferSuccessors(&MBB);
1132 
1133  MBB.addSuccessor(LoadCmpBB);
1134 
1135  NextMBBI = MBB.end();
1136  MI.eraseFromParent();
1137 
1138  // Recompute livein lists.
1139  LivePhysRegs LiveRegs;
1140  computeAndAddLiveIns(LiveRegs, *DoneBB);
1141  computeAndAddLiveIns(LiveRegs, *StoreBB);
1142  computeAndAddLiveIns(LiveRegs, *LoadCmpBB);
1143  // Do an extra pass around the loop to get loop carried registers right.
1144  StoreBB->clearLiveIns();
1145  computeAndAddLiveIns(LiveRegs, *StoreBB);
1146  LoadCmpBB->clearLiveIns();
1147  computeAndAddLiveIns(LiveRegs, *LoadCmpBB);
1148 
1149  return true;
1150 }
1151 
1152 
1153 bool ARMExpandPseudo::ExpandMI(MachineBasicBlock &MBB,
1154  MachineBasicBlock::iterator MBBI,
1155  MachineBasicBlock::iterator &NextMBBI) {
1156  MachineInstr &MI = *MBBI;
1157  unsigned Opcode = MI.getOpcode();
1158  switch (Opcode) {
1159  default:
1160  return false;
1161 
1162  case ARM::TCRETURNdi:
1163  case ARM::TCRETURNri: {
1164  MachineBasicBlock::iterator MBBI = MBB.getLastNonDebugInstr();
1165  assert(MBBI->isReturn() &&
1166  "Can only insert epilog into returning blocks");
1167  unsigned RetOpcode = MBBI->getOpcode();
1168  DebugLoc dl = MBBI->getDebugLoc();
1169  const ARMBaseInstrInfo &TII = *static_cast<const ARMBaseInstrInfo *>(
1170  MBB.getParent()->getSubtarget().getInstrInfo());
1171 
1172  // Tail call return: adjust the stack pointer and jump to callee.
1173  MBBI = MBB.getLastNonDebugInstr();
1174  MachineOperand &JumpTarget = MBBI->getOperand(0);
1175 
1176  // Jump to label or value in register.
1177  if (RetOpcode == ARM::TCRETURNdi) {
1178  unsigned TCOpcode =
1179  STI->isThumb()
1180  ? (STI->isTargetMachO() ? ARM::tTAILJMPd : ARM::tTAILJMPdND)
1181  : ARM::TAILJMPd;
1182  MachineInstrBuilder MIB = BuildMI(MBB, MBBI, dl, TII.get(TCOpcode));
1183  if (JumpTarget.isGlobal())
1184  MIB.addGlobalAddress(JumpTarget.getGlobal(), JumpTarget.getOffset(),
1185  JumpTarget.getTargetFlags());
1186  else {
1187  assert(JumpTarget.isSymbol());
1188  MIB.addExternalSymbol(JumpTarget.getSymbolName(),
1189  JumpTarget.getTargetFlags());
1190  }
1191 
1192  // Add the default predicate in Thumb mode.
1193  if (STI->isThumb())
1194  MIB.add(predOps(ARMCC::AL));
1195  } else if (RetOpcode == ARM::TCRETURNri) {
1196  unsigned Opcode =
1197  STI->isThumb() ? ARM::tTAILJMPr
1198  : (STI->hasV4TOps() ? ARM::TAILJMPr : ARM::TAILJMPr4);
1199  BuildMI(MBB, MBBI, dl,
1200  TII.get(Opcode))
1201  .addReg(JumpTarget.getReg(), RegState::Kill);
1202  }
1203 
1204  auto NewMI = std::prev(MBBI);
1205  for (unsigned i = 1, e = MBBI->getNumOperands(); i != e; ++i)
1206  NewMI->addOperand(MBBI->getOperand(i));
1207 
1208  // Delete the pseudo instruction TCRETURN.
1209  MBB.erase(MBBI);
1210  MBBI = NewMI;
1211  return true;
1212  }
1213  case ARM::VMOVScc:
1214  case ARM::VMOVDcc: {
1215  unsigned newOpc = Opcode == ARM::VMOVScc ? ARM::VMOVS : ARM::VMOVD;
1216  BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(newOpc),
1217  MI.getOperand(1).getReg())
1218  .add(MI.getOperand(2))
1219  .addImm(MI.getOperand(3).getImm()) // 'pred'
1220  .add(MI.getOperand(4))
1221  .add(makeImplicit(MI.getOperand(1)));
1222 
1223  MI.eraseFromParent();
1224  return true;
1225  }
1226  case ARM::t2MOVCCr:
1227  case ARM::MOVCCr: {
1228  unsigned Opc = AFI->isThumbFunction() ? ARM::t2MOVr : ARM::MOVr;
1229  BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(Opc),
1230  MI.getOperand(1).getReg())
1231  .add(MI.getOperand(2))
1232  .addImm(MI.getOperand(3).getImm()) // 'pred'
1233  .add(MI.getOperand(4))
1234  .add(condCodeOp()) // 's' bit
1235  .add(makeImplicit(MI.getOperand(1)));
1236 
1237  MI.eraseFromParent();
1238  return true;
1239  }
1240  case ARM::MOVCCsi: {
1241  BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(ARM::MOVsi),
1242  (MI.getOperand(1).getReg()))
1243  .add(MI.getOperand(2))
1244  .addImm(MI.getOperand(3).getImm())
1245  .addImm(MI.getOperand(4).getImm()) // 'pred'
1246  .add(MI.getOperand(5))
1247  .add(condCodeOp()) // 's' bit
1248  .add(makeImplicit(MI.getOperand(1)));
1249 
1250  MI.eraseFromParent();
1251  return true;
1252  }
1253  case ARM::MOVCCsr: {
1254  BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(ARM::MOVsr),
1255  (MI.getOperand(1).getReg()))
1256  .add(MI.getOperand(2))
1257  .add(MI.getOperand(3))
1258  .addImm(MI.getOperand(4).getImm())
1259  .addImm(MI.getOperand(5).getImm()) // 'pred'
1260  .add(MI.getOperand(6))
1261  .add(condCodeOp()) // 's' bit
1262  .add(makeImplicit(MI.getOperand(1)));
1263 
1264  MI.eraseFromParent();
1265  return true;
1266  }
1267  case ARM::t2MOVCCi16:
1268  case ARM::MOVCCi16: {
1269  unsigned NewOpc = AFI->isThumbFunction() ? ARM::t2MOVi16 : ARM::MOVi16;
1270  BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(NewOpc),
1271  MI.getOperand(1).getReg())
1272  .addImm(MI.getOperand(2).getImm())
1273  .addImm(MI.getOperand(3).getImm()) // 'pred'
1274  .add(MI.getOperand(4))
1275  .add(makeImplicit(MI.getOperand(1)));
1276  MI.eraseFromParent();
1277  return true;
1278  }
1279  case ARM::t2MOVCCi:
1280  case ARM::MOVCCi: {
1281  unsigned Opc = AFI->isThumbFunction() ? ARM::t2MOVi : ARM::MOVi;
1282  BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(Opc),
1283  MI.getOperand(1).getReg())
1284  .addImm(MI.getOperand(2).getImm())
1285  .addImm(MI.getOperand(3).getImm()) // 'pred'
1286  .add(MI.getOperand(4))
1287  .add(condCodeOp()) // 's' bit
1288  .add(makeImplicit(MI.getOperand(1)));
1289 
1290  MI.eraseFromParent();
1291  return true;
1292  }
1293  case ARM::t2MVNCCi:
1294  case ARM::MVNCCi: {
1295  unsigned Opc = AFI->isThumbFunction() ? ARM::t2MVNi : ARM::MVNi;
1296  BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(Opc),
1297  MI.getOperand(1).getReg())
1298  .addImm(MI.getOperand(2).getImm())
1299  .addImm(MI.getOperand(3).getImm()) // 'pred'
1300  .add(MI.getOperand(4))
1301  .add(condCodeOp()) // 's' bit
1302  .add(makeImplicit(MI.getOperand(1)));
1303 
1304  MI.eraseFromParent();
1305  return true;
1306  }
1307  case ARM::t2MOVCClsl:
1308  case ARM::t2MOVCClsr:
1309  case ARM::t2MOVCCasr:
1310  case ARM::t2MOVCCror: {
1311  unsigned NewOpc;
1312  switch (Opcode) {
1313  case ARM::t2MOVCClsl: NewOpc = ARM::t2LSLri; break;
1314  case ARM::t2MOVCClsr: NewOpc = ARM::t2LSRri; break;
1315  case ARM::t2MOVCCasr: NewOpc = ARM::t2ASRri; break;
1316  case ARM::t2MOVCCror: NewOpc = ARM::t2RORri; break;
1317  default: llvm_unreachable("unexpeced conditional move");
1318  }
1319  BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(NewOpc),
1320  MI.getOperand(1).getReg())
1321  .add(MI.getOperand(2))
1322  .addImm(MI.getOperand(3).getImm())
1323  .addImm(MI.getOperand(4).getImm()) // 'pred'
1324  .add(MI.getOperand(5))
1325  .add(condCodeOp()) // 's' bit
1326  .add(makeImplicit(MI.getOperand(1)));
1327  MI.eraseFromParent();
1328  return true;
1329  }
1330  case ARM::Int_eh_sjlj_dispatchsetup: {
1331  MachineFunction &MF = *MI.getParent()->getParent();
1332  const ARMBaseInstrInfo *AII =
1333  static_cast<const ARMBaseInstrInfo*>(TII);
1334  const ARMBaseRegisterInfo &RI = AII->getRegisterInfo();
1335  // For functions using a base pointer, we rematerialize it (via the frame
1336  // pointer) here since eh.sjlj.setjmp and eh.sjlj.longjmp don't do it
1337  // for us. Otherwise, expand to nothing.
1338  if (RI.hasBasePointer(MF)) {
1339  int32_t NumBytes = AFI->getFramePtrSpillOffset();
1340  Register FramePtr = RI.getFrameRegister(MF);
1341  assert(MF.getSubtarget().getFrameLowering()->hasFP(MF) &&
1342  "base pointer without frame pointer?");
1343 
1344  if (AFI->isThumb2Function()) {
1345  emitT2RegPlusImmediate(MBB, MBBI, MI.getDebugLoc(), ARM::R6,
1346  FramePtr, -NumBytes, ARMCC::AL, 0, *TII);
1347  } else if (AFI->isThumbFunction()) {
1348  emitThumbRegPlusImmediate(MBB, MBBI, MI.getDebugLoc(), ARM::R6,
1349  FramePtr, -NumBytes, *TII, RI);
1350  } else {
1351  emitARMRegPlusImmediate(MBB, MBBI, MI.getDebugLoc(), ARM::R6,
1352  FramePtr, -NumBytes, ARMCC::AL, 0,
1353  *TII);
1354  }
1355  // If there's dynamic realignment, adjust for it.
1356  if (RI.needsStackRealignment(MF)) {
1357  MachineFrameInfo &MFI = MF.getFrameInfo();
1358  unsigned MaxAlign = MFI.getMaxAlignment();
1359  assert (!AFI->isThumb1OnlyFunction());
1360  // Emit bic r6, r6, MaxAlign
1361  assert(MaxAlign <= 256 && "The BIC instruction cannot encode "
1362  "immediates larger than 256 with all lower "
1363  "bits set.");
1364  unsigned bicOpc = AFI->isThumbFunction() ?
1365  ARM::t2BICri : ARM::BICri;
1366  BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(bicOpc), ARM::R6)
1367  .addReg(ARM::R6, RegState::Kill)
1368  .addImm(MaxAlign - 1)
1369  .add(predOps(ARMCC::AL))
1370  .add(condCodeOp());
1371  }
1372 
1373  }
1374  MI.eraseFromParent();
1375  return true;
1376  }
1377 
1378  case ARM::MOVsrl_flag:
1379  case ARM::MOVsra_flag: {
1380  // These are just fancy MOVs instructions.
1381  BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(ARM::MOVsi),
1382  MI.getOperand(0).getReg())
1383  .add(MI.getOperand(1))
1384  .addImm(ARM_AM::getSORegOpc(
1385  (Opcode == ARM::MOVsrl_flag ? ARM_AM::lsr : ARM_AM::asr), 1))
1386  .add(predOps(ARMCC::AL))
1387  .addReg(ARM::CPSR, RegState::Define);
1388  MI.eraseFromParent();
1389  return true;
1390  }
1391  case ARM::RRX: {
1392  // This encodes as "MOVs Rd, Rm, rrx
1393  MachineInstrBuilder MIB =
1394  BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(ARM::MOVsi),
1395  MI.getOperand(0).getReg())
1396  .add(MI.getOperand(1))
1397  .addImm(ARM_AM::getSORegOpc(ARM_AM::rrx, 0))
1398  .add(predOps(ARMCC::AL))
1399  .add(condCodeOp());
1400  TransferImpOps(MI, MIB, MIB);
1401  MI.eraseFromParent();
1402  return true;
1403  }
1404  case ARM::tTPsoft:
1405  case ARM::TPsoft: {
1406  const bool Thumb = Opcode == ARM::tTPsoft;
1407 
1408  MachineInstrBuilder MIB;
1409  if (STI->genLongCalls()) {
1410  MachineFunction *MF = MBB.getParent();
1411  MachineConstantPool *MCP = MF->getConstantPool();
1412  unsigned PCLabelID = AFI->createPICLabelUId();
1413  MachineConstantPoolValue *CPV =
1414  ARMConstantPoolSymbol::Create(MF->getFunction().getContext(),
1415  "__aeabi_read_tp", PCLabelID, 0);
1416  Register Reg = MI.getOperand(0).getReg();
1417  MIB = BuildMI(MBB, MBBI, MI.getDebugLoc(),
1418  TII->get(Thumb ? ARM::tLDRpci : ARM::LDRi12), Reg)
1419  .addConstantPoolIndex(MCP->getConstantPoolIndex(CPV, 4));
1420  if (!Thumb)
1421  MIB.addImm(0);
1422  MIB.add(predOps(ARMCC::AL));
1423 
1424  MIB = BuildMI(MBB, MBBI, MI.getDebugLoc(),
1425  TII->get(Thumb ? ARM::tBLXr : ARM::BLX));
1426  if (Thumb)
1427  MIB.add(predOps(ARMCC::AL));
1428  MIB.addReg(Reg, RegState::Kill);
1429  } else {
1430  MIB = BuildMI(MBB, MBBI, MI.getDebugLoc(),
1431  TII->get(Thumb ? ARM::tBL : ARM::BL));
1432  if (Thumb)
1433  MIB.add(predOps(ARMCC::AL));
1434  MIB.addExternalSymbol("__aeabi_read_tp", 0);
1435  }
1436 
1437  MIB.cloneMemRefs(MI);
1438  TransferImpOps(MI, MIB, MIB);
1439  MI.eraseFromParent();
1440  return true;
1441  }
1442  case ARM::tLDRpci_pic:
1443  case ARM::t2LDRpci_pic: {
1444  unsigned NewLdOpc = (Opcode == ARM::tLDRpci_pic)
1445  ? ARM::tLDRpci : ARM::t2LDRpci;
1446  Register DstReg = MI.getOperand(0).getReg();
1447  bool DstIsDead = MI.getOperand(0).isDead();
1448  MachineInstrBuilder MIB1 =
1449  BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(NewLdOpc), DstReg)
1450  .add(MI.getOperand(1))
1451  .add(predOps(ARMCC::AL));
1452  MIB1.cloneMemRefs(MI);
1453  MachineInstrBuilder MIB2 =
1454  BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(ARM::tPICADD))
1455  .addReg(DstReg, RegState::Define | getDeadRegState(DstIsDead))
1456  .addReg(DstReg)
1457  .add(MI.getOperand(2));
1458  TransferImpOps(MI, MIB1, MIB2);
1459  MI.eraseFromParent();
1460  return true;
1461  }
1462 
1463  case ARM::LDRLIT_ga_abs:
1464  case ARM::LDRLIT_ga_pcrel:
1465  case ARM::LDRLIT_ga_pcrel_ldr:
1466  case ARM::tLDRLIT_ga_abs:
1467  case ARM::tLDRLIT_ga_pcrel: {
1468  Register DstReg = MI.getOperand(0).getReg();
1469  bool DstIsDead = MI.getOperand(0).isDead();
1470  const MachineOperand &MO1 = MI.getOperand(1);
1471  auto Flags = MO1.getTargetFlags();
1472  const GlobalValue *GV = MO1.getGlobal();
1473  bool IsARM =
1474  Opcode != ARM::tLDRLIT_ga_pcrel && Opcode != ARM::tLDRLIT_ga_abs;
1475  bool IsPIC =
1476  Opcode != ARM::LDRLIT_ga_abs && Opcode != ARM::tLDRLIT_ga_abs;
1477  unsigned LDRLITOpc = IsARM ? ARM::LDRi12 : ARM::tLDRpci;
1478  unsigned PICAddOpc =
1479  IsARM
1480  ? (Opcode == ARM::LDRLIT_ga_pcrel_ldr ? ARM::PICLDR : ARM::PICADD)
1481  : ARM::tPICADD;
1482 
1483  // We need a new const-pool entry to load from.
1484  MachineConstantPool *MCP = MBB.getParent()->getConstantPool();
1485  unsigned ARMPCLabelIndex = 0;
1486  MachineConstantPoolValue *CPV;
1487 
1488  if (IsPIC) {
1489  unsigned PCAdj = IsARM ? 8 : 4;
1490  auto Modifier = (Flags & ARMII::MO_GOT)
1491  ? ARMCP::GOT_PREL
1492  : ARMCP::no_modifier;
1493  ARMPCLabelIndex = AFI->createPICLabelUId();
1494  CPV = ARMConstantPoolConstant::Create(
1495  GV, ARMPCLabelIndex, ARMCP::CPValue, PCAdj, Modifier,
1496  /*AddCurrentAddr*/ Modifier == ARMCP::GOT_PREL);
1497  } else
1498  CPV = ARMConstantPoolConstant::Create(GV, ARMCP::no_modifier);
1499 
1500  MachineInstrBuilder MIB =
1501  BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(LDRLITOpc), DstReg)
1502  .addConstantPoolIndex(MCP->getConstantPoolIndex(CPV, 4));
1503  if (IsARM)
1504  MIB.addImm(0);
1505  MIB.add(predOps(ARMCC::AL));
1506 
1507  if (IsPIC) {
1508  MachineInstrBuilder MIB =
1509  BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(PICAddOpc))
1510  .addReg(DstReg, RegState::Define | getDeadRegState(DstIsDead))
1511  .addReg(DstReg)
1512  .addImm(ARMPCLabelIndex);
1513 
1514  if (IsARM)
1515  MIB.add(predOps(ARMCC::AL));
1516  }
1517 
1518  MI.eraseFromParent();
1519  return true;
1520  }
1521  case ARM::MOV_ga_pcrel:
1522  case ARM::MOV_ga_pcrel_ldr:
1523  case ARM::t2MOV_ga_pcrel: {
1524  // Expand into movw + movw. Also "add pc" / ldr [pc] in PIC mode.
1525  unsigned LabelId = AFI->createPICLabelUId();
1526  Register DstReg = MI.getOperand(0).getReg();
1527  bool DstIsDead = MI.getOperand(0).isDead();
1528  const MachineOperand &MO1 = MI.getOperand(1);
1529  const GlobalValue *GV = MO1.getGlobal();
1530  unsigned TF = MO1.getTargetFlags();
1531  bool isARM = Opcode != ARM::t2MOV_ga_pcrel;
1532  unsigned LO16Opc = isARM ? ARM::MOVi16_ga_pcrel : ARM::t2MOVi16_ga_pcrel;
1533  unsigned HI16Opc = isARM ? ARM::MOVTi16_ga_pcrel :ARM::t2MOVTi16_ga_pcrel;
1534  unsigned LO16TF = TF | ARMII::MO_LO16;
1535  unsigned HI16TF = TF | ARMII::MO_HI16;
1536  unsigned PICAddOpc = isARM
1537  ? (Opcode == ARM::MOV_ga_pcrel_ldr ? ARM::PICLDR : ARM::PICADD)
1538  : ARM::tPICADD;
1539  MachineInstrBuilder MIB1 = BuildMI(MBB, MBBI, MI.getDebugLoc(),
1540  TII->get(LO16Opc), DstReg)
1541  .addGlobalAddress(GV, MO1.getOffset(), TF | LO16TF)
1542  .addImm(LabelId);
1543 
1544  BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(HI16Opc), DstReg)
1545  .addReg(DstReg)
1546  .addGlobalAddress(GV, MO1.getOffset(), TF | HI16TF)
1547  .addImm(LabelId);
1548 
1549  MachineInstrBuilder MIB3 = BuildMI(MBB, MBBI, MI.getDebugLoc(),
1550  TII->get(PICAddOpc))
1551  .addReg(DstReg, RegState::Define | getDeadRegState(DstIsDead))
1552  .addReg(DstReg).addImm(LabelId);
1553  if (isARM) {
1554  MIB3.add(predOps(ARMCC::AL));
1555  if (Opcode == ARM::MOV_ga_pcrel_ldr)
1556  MIB3.cloneMemRefs(MI);
1557  }
1558  TransferImpOps(MI, MIB1, MIB3);
1559  MI.eraseFromParent();
1560  return true;
1561  }
1562 
1563  case ARM::MOVi32imm:
1564  case ARM::MOVCCi32imm:
1565  case ARM::t2MOVi32imm:
1566  case ARM::t2MOVCCi32imm:
1567  ExpandMOV32BitImm(MBB, MBBI);
1568  return true;
1569 
1570  case ARM::SUBS_PC_LR: {
1571  MachineInstrBuilder MIB =
1572  BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(ARM::SUBri), ARM::PC)
1573  .addReg(ARM::LR)
1574  .add(MI.getOperand(0))
1575  .add(MI.getOperand(1))
1576  .add(MI.getOperand(2))
1577  .addReg(ARM::CPSR, RegState::Undef);
1578  TransferImpOps(MI, MIB, MIB);
1579  MI.eraseFromParent();
1580  return true;
1581  }
1582  case ARM::VLDMQIA: {
1583  unsigned NewOpc = ARM::VLDMDIA;
1584  MachineInstrBuilder MIB =
1585  BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(NewOpc));
1586  unsigned OpIdx = 0;
1587 
1588  // Grab the Q register destination.
1589  bool DstIsDead = MI.getOperand(OpIdx).isDead();
1590  Register DstReg = MI.getOperand(OpIdx++).getReg();
1591 
1592  // Copy the source register.
1593  MIB.add(MI.getOperand(OpIdx++));
1594 
1595  // Copy the predicate operands.
1596  MIB.add(MI.getOperand(OpIdx++));
1597  MIB.add(MI.getOperand(OpIdx++));
1598 
1599  // Add the destination operands (D subregs).
1600  Register D0 = TRI->getSubReg(DstReg, ARM::dsub_0);
1601  Register D1 = TRI->getSubReg(DstReg, ARM::dsub_1);
1602  MIB.addReg(D0, RegState::Define | getDeadRegState(DstIsDead))
1603  .addReg(D1, RegState::Define | getDeadRegState(DstIsDead));
1604 
1605  // Add an implicit def for the super-register.
1606  MIB.addReg(DstReg, RegState::ImplicitDefine | getDeadRegState(DstIsDead));
1607  TransferImpOps(MI, MIB, MIB);
1608  MIB.cloneMemRefs(MI);
1609  MI.eraseFromParent();
1610  return true;
1611  }
1612 
1613  case ARM::VSTMQIA: {
1614  unsigned NewOpc = ARM::VSTMDIA;
1615  MachineInstrBuilder MIB =
1616  BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(NewOpc));
1617  unsigned OpIdx = 0;
1618 
1619  // Grab the Q register source.
1620  bool SrcIsKill = MI.getOperand(OpIdx).isKill();
1621  Register SrcReg = MI.getOperand(OpIdx++).getReg();
1622 
1623  // Copy the destination register.
1624  MachineOperand Dst(MI.getOperand(OpIdx++));
1625  MIB.add(Dst);
1626 
1627  // Copy the predicate operands.
1628  MIB.add(MI.getOperand(OpIdx++));
1629  MIB.add(MI.getOperand(OpIdx++));
1630 
1631  // Add the source operands (D subregs).
1632  Register D0 = TRI->getSubReg(SrcReg, ARM::dsub_0);
1633  Register D1 = TRI->getSubReg(SrcReg, ARM::dsub_1);
1634  MIB.addReg(D0, SrcIsKill ? RegState::Kill : 0)
1635  .addReg(D1, SrcIsKill ? RegState::Kill : 0);
1636 
1637  if (SrcIsKill) // Add an implicit kill for the Q register.
1638  MIB->addRegisterKilled(SrcReg, TRI, true);
1639 
1640  TransferImpOps(MI, MIB, MIB);
1641  MIB.cloneMemRefs(MI);
1642  MI.eraseFromParent();
1643  return true;
1644  }
1645 
1646  case ARM::VLD2q8Pseudo:
1647  case ARM::VLD2q16Pseudo:
1648  case ARM::VLD2q32Pseudo:
1649  case ARM::VLD2q8PseudoWB_fixed:
1650  case ARM::VLD2q16PseudoWB_fixed:
1651  case ARM::VLD2q32PseudoWB_fixed:
1652  case ARM::VLD2q8PseudoWB_register:
1653  case ARM::VLD2q16PseudoWB_register:
1654  case ARM::VLD2q32PseudoWB_register:
1655  case ARM::VLD3d8Pseudo:
1656  case ARM::VLD3d16Pseudo:
1657  case ARM::VLD3d32Pseudo:
1658  case ARM::VLD1d8TPseudo:
1659  case ARM::VLD1d16TPseudo:
1660  case ARM::VLD1d32TPseudo:
1661  case ARM::VLD1d64TPseudo:
1662  case ARM::VLD1d64TPseudoWB_fixed:
1663  case ARM::VLD1d64TPseudoWB_register:
1664  case ARM::VLD3d8Pseudo_UPD:
1665  case ARM::VLD3d16Pseudo_UPD:
1666  case ARM::VLD3d32Pseudo_UPD:
1667  case ARM::VLD3q8Pseudo_UPD:
1668  case ARM::VLD3q16Pseudo_UPD:
1669  case ARM::VLD3q32Pseudo_UPD:
1670  case ARM::VLD3q8oddPseudo:
1671  case ARM::VLD3q16oddPseudo:
1672  case ARM::VLD3q32oddPseudo:
1673  case ARM::VLD3q8oddPseudo_UPD:
1674  case ARM::VLD3q16oddPseudo_UPD:
1675  case ARM::VLD3q32oddPseudo_UPD:
1676  case ARM::VLD4d8Pseudo:
1677  case ARM::VLD4d16Pseudo:
1678  case ARM::VLD4d32Pseudo:
1679  case ARM::VLD1d8QPseudo:
1680  case ARM::VLD1d16QPseudo:
1681  case ARM::VLD1d32QPseudo:
1682  case ARM::VLD1d64QPseudo:
1683  case ARM::VLD1d64QPseudoWB_fixed:
1684  case ARM::VLD1d64QPseudoWB_register:
1685  case ARM::VLD1q8HighQPseudo:
1686  case ARM::VLD1q8LowQPseudo_UPD:
1687  case ARM::VLD1q8HighTPseudo:
1688  case ARM::VLD1q8LowTPseudo_UPD:
1689  case ARM::VLD1q16HighQPseudo:
1690  case ARM::VLD1q16LowQPseudo_UPD:
1691  case ARM::VLD1q16HighTPseudo:
1692  case ARM::VLD1q16LowTPseudo_UPD:
1693  case ARM::VLD1q32HighQPseudo:
1694  case ARM::VLD1q32LowQPseudo_UPD:
1695  case ARM::VLD1q32HighTPseudo:
1696  case ARM::VLD1q32LowTPseudo_UPD:
1697  case ARM::VLD1q64HighQPseudo:
1698  case ARM::VLD1q64LowQPseudo_UPD:
1699  case ARM::VLD1q64HighTPseudo:
1700  case ARM::VLD1q64LowTPseudo_UPD:
1701  case ARM::VLD4d8Pseudo_UPD:
1702  case ARM::VLD4d16Pseudo_UPD:
1703  case ARM::VLD4d32Pseudo_UPD:
1704  case ARM::VLD4q8Pseudo_UPD:
1705  case ARM::VLD4q16Pseudo_UPD:
1706  case ARM::VLD4q32Pseudo_UPD:
1707  case ARM::VLD4q8oddPseudo:
1708  case ARM::VLD4q16oddPseudo:
1709  case ARM::VLD4q32oddPseudo:
1710  case ARM::VLD4q8oddPseudo_UPD:
1711  case ARM::VLD4q16oddPseudo_UPD:
1712  case ARM::VLD4q32oddPseudo_UPD:
1713  case ARM::VLD3DUPd8Pseudo:
1714  case ARM::VLD3DUPd16Pseudo:
1715  case ARM::VLD3DUPd32Pseudo:
1716  case ARM::VLD3DUPd8Pseudo_UPD:
1717  case ARM::VLD3DUPd16Pseudo_UPD:
1718  case ARM::VLD3DUPd32Pseudo_UPD:
1719  case ARM::VLD4DUPd8Pseudo:
1720  case ARM::VLD4DUPd16Pseudo:
1721  case ARM::VLD4DUPd32Pseudo:
1722  case ARM::VLD4DUPd8Pseudo_UPD:
1723  case ARM::VLD4DUPd16Pseudo_UPD:
1724  case ARM::VLD4DUPd32Pseudo_UPD:
1725  case ARM::VLD2DUPq8EvenPseudo:
1726  case ARM::VLD2DUPq8OddPseudo:
1727  case ARM::VLD2DUPq16EvenPseudo:
1728  case ARM::VLD2DUPq16OddPseudo:
1729  case ARM::VLD2DUPq32EvenPseudo:
1730  case ARM::VLD2DUPq32OddPseudo:
1731  case ARM::VLD3DUPq8EvenPseudo:
1732  case ARM::VLD3DUPq8OddPseudo:
1733  case ARM::VLD3DUPq16EvenPseudo:
1734  case ARM::VLD3DUPq16OddPseudo:
1735  case ARM::VLD3DUPq32EvenPseudo:
1736  case ARM::VLD3DUPq32OddPseudo:
1737  case ARM::VLD4DUPq8EvenPseudo:
1738  case ARM::VLD4DUPq8OddPseudo:
1739  case ARM::VLD4DUPq16EvenPseudo:
1740  case ARM::VLD4DUPq16OddPseudo:
1741  case ARM::VLD4DUPq32EvenPseudo:
1742  case ARM::VLD4DUPq32OddPseudo:
1743  ExpandVLD(MBBI);
1744  return true;
1745 
1746  case ARM::VST2q8Pseudo:
1747  case ARM::VST2q16Pseudo:
1748  case ARM::VST2q32Pseudo:
1749  case ARM::VST2q8PseudoWB_fixed:
1750  case ARM::VST2q16PseudoWB_fixed:
1751  case ARM::VST2q32PseudoWB_fixed:
1752  case ARM::VST2q8PseudoWB_register:
1753  case ARM::VST2q16PseudoWB_register:
1754  case ARM::VST2q32PseudoWB_register:
1755  case ARM::VST3d8Pseudo:
1756  case ARM::VST3d16Pseudo:
1757  case ARM::VST3d32Pseudo:
1758  case ARM::VST1d8TPseudo:
1759  case ARM::VST1d16TPseudo:
1760  case ARM::VST1d32TPseudo:
1761  case ARM::VST1d64TPseudo:
1762  case ARM::VST3d8Pseudo_UPD:
1763  case ARM::VST3d16Pseudo_UPD:
1764  case ARM::VST3d32Pseudo_UPD:
1765  case ARM::VST1d64TPseudoWB_fixed:
1766  case ARM::VST1d64TPseudoWB_register:
1767  case ARM::VST3q8Pseudo_UPD:
1768  case ARM::VST3q16Pseudo_UPD:
1769  case ARM::VST3q32Pseudo_UPD:
1770  case ARM::VST3q8oddPseudo:
1771  case ARM::VST3q16oddPseudo:
1772  case ARM::VST3q32oddPseudo:
1773  case ARM::VST3q8oddPseudo_UPD:
1774  case ARM::VST3q16oddPseudo_UPD:
1775  case ARM::VST3q32oddPseudo_UPD:
1776  case ARM::VST4d8Pseudo:
1777  case ARM::VST4d16Pseudo:
1778  case ARM::VST4d32Pseudo:
1779  case ARM::VST1d8QPseudo:
1780  case ARM::VST1d16QPseudo:
1781  case ARM::VST1d32QPseudo:
1782  case ARM::VST1d64QPseudo:
1783  case ARM::VST4d8Pseudo_UPD:
1784  case ARM::VST4d16Pseudo_UPD:
1785  case ARM::VST4d32Pseudo_UPD:
1786  case ARM::VST1d64QPseudoWB_fixed:
1787  case ARM::VST1d64QPseudoWB_register:
1788  case ARM::VST1q8HighQPseudo:
1789  case ARM::VST1q8LowQPseudo_UPD:
1790  case ARM::VST1q8HighTPseudo:
1791  case ARM::VST1q8LowTPseudo_UPD:
1792  case ARM::VST1q16HighQPseudo:
1793  case ARM::VST1q16LowQPseudo_UPD:
1794  case ARM::VST1q16HighTPseudo:
1795  case ARM::VST1q16LowTPseudo_UPD:
1796  case ARM::VST1q32HighQPseudo:
1797  case ARM::VST1q32LowQPseudo_UPD:
1798  case ARM::VST1q32HighTPseudo:
1799  case ARM::VST1q32LowTPseudo_UPD:
1800  case ARM::VST1q64HighQPseudo:
1801  case ARM::VST1q64LowQPseudo_UPD:
1802  case ARM::VST1q64HighTPseudo:
1803  case ARM::VST1q64LowTPseudo_UPD:
1804  case ARM::VST4q8Pseudo_UPD:
1805  case ARM::VST4q16Pseudo_UPD:
1806  case ARM::VST4q32Pseudo_UPD:
1807  case ARM::VST4q8oddPseudo:
1808  case ARM::VST4q16oddPseudo:
1809  case ARM::VST4q32oddPseudo:
1810  case ARM::VST4q8oddPseudo_UPD:
1811  case ARM::VST4q16oddPseudo_UPD:
1812  case ARM::VST4q32oddPseudo_UPD:
1813  ExpandVST(MBBI);
1814  return true;
1815 
1816  case ARM::VLD1LNq8Pseudo:
1817  case ARM::VLD1LNq16Pseudo:
1818  case ARM::VLD1LNq32Pseudo:
1819  case ARM::VLD1LNq8Pseudo_UPD:
1820  case ARM::VLD1LNq16Pseudo_UPD:
1821  case ARM::VLD1LNq32Pseudo_UPD:
1822  case ARM::VLD2LNd8Pseudo:
1823  case ARM::VLD2LNd16Pseudo:
1824  case ARM::VLD2LNd32Pseudo:
1825  case ARM::VLD2LNq16Pseudo:
1826  case ARM::VLD2LNq32Pseudo:
1827  case ARM::VLD2LNd8Pseudo_UPD:
1828  case ARM::VLD2LNd16Pseudo_UPD:
1829  case ARM::VLD2LNd32Pseudo_UPD:
1830  case ARM::VLD2LNq16Pseudo_UPD:
1831  case ARM::VLD2LNq32Pseudo_UPD:
1832  case ARM::VLD3LNd8Pseudo:
1833  case ARM::VLD3LNd16Pseudo:
1834  case ARM::VLD3LNd32Pseudo:
1835  case ARM::VLD3LNq16Pseudo:
1836  case ARM::VLD3LNq32Pseudo:
1837  case ARM::VLD3LNd8Pseudo_UPD:
1838  case ARM::VLD3LNd16Pseudo_UPD:
1839  case ARM::VLD3LNd32Pseudo_UPD:
1840  case ARM::VLD3LNq16Pseudo_UPD:
1841  case ARM::VLD3LNq32Pseudo_UPD:
1842  case ARM::VLD4LNd8Pseudo:
1843  case ARM::VLD4LNd16Pseudo:
1844  case ARM::VLD4LNd32Pseudo:
1845  case ARM::VLD4LNq16Pseudo:
1846  case ARM::VLD4LNq32Pseudo:
1847  case ARM::VLD4LNd8Pseudo_UPD:
1848  case ARM::VLD4LNd16Pseudo_UPD:
1849  case ARM::VLD4LNd32Pseudo_UPD:
1850  case ARM::VLD4LNq16Pseudo_UPD:
1851  case ARM::VLD4LNq32Pseudo_UPD:
1852  case ARM::VST1LNq8Pseudo:
1853  case ARM::VST1LNq16Pseudo:
1854  case ARM::VST1LNq32Pseudo:
1855  case ARM::VST1LNq8Pseudo_UPD:
1856  case ARM::VST1LNq16Pseudo_UPD:
1857  case ARM::VST1LNq32Pseudo_UPD:
1858  case ARM::VST2LNd8Pseudo:
1859  case ARM::VST2LNd16Pseudo:
1860  case ARM::VST2LNd32Pseudo:
1861  case ARM::VST2LNq16Pseudo:
1862  case ARM::VST2LNq32Pseudo:
1863  case ARM::VST2LNd8Pseudo_UPD:
1864  case ARM::VST2LNd16Pseudo_UPD:
1865  case ARM::VST2LNd32Pseudo_UPD:
1866  case ARM::VST2LNq16Pseudo_UPD:
1867  case ARM::VST2LNq32Pseudo_UPD:
1868  case ARM::VST3LNd8Pseudo:
1869  case ARM::VST3LNd16Pseudo:
1870  case ARM::VST3LNd32Pseudo:
1871  case ARM::VST3LNq16Pseudo:
1872  case ARM::VST3LNq32Pseudo:
1873  case ARM::VST3LNd8Pseudo_UPD:
1874  case ARM::VST3LNd16Pseudo_UPD:
1875  case ARM::VST3LNd32Pseudo_UPD:
1876  case ARM::VST3LNq16Pseudo_UPD:
1877  case ARM::VST3LNq32Pseudo_UPD:
1878  case ARM::VST4LNd8Pseudo:
1879  case ARM::VST4LNd16Pseudo:
1880  case ARM::VST4LNd32Pseudo:
1881  case ARM::VST4LNq16Pseudo:
1882  case ARM::VST4LNq32Pseudo:
1883  case ARM::VST4LNd8Pseudo_UPD:
1884  case ARM::VST4LNd16Pseudo_UPD:
1885  case ARM::VST4LNd32Pseudo_UPD:
1886  case ARM::VST4LNq16Pseudo_UPD:
1887  case ARM::VST4LNq32Pseudo_UPD:
1888  ExpandLaneOp(MBBI);
1889  return true;
1890 
1891  case ARM::VTBL3Pseudo: ExpandVTBL(MBBI, ARM::VTBL3, false); return true;
1892  case ARM::VTBL4Pseudo: ExpandVTBL(MBBI, ARM::VTBL4, false); return true;
1893  case ARM::VTBX3Pseudo: ExpandVTBL(MBBI, ARM::VTBX3, true); return true;
1894  case ARM::VTBX4Pseudo: ExpandVTBL(MBBI, ARM::VTBX4, true); return true;
1895 
1896  case ARM::CMP_SWAP_8:
1897  if (STI->isThumb())
1898  return ExpandCMP_SWAP(MBB, MBBI, ARM::t2LDREXB, ARM::t2STREXB,
1899  ARM::tUXTB, NextMBBI);
1900  else
1901  return ExpandCMP_SWAP(MBB, MBBI, ARM::LDREXB, ARM::STREXB,
1902  ARM::UXTB, NextMBBI);
1903  case ARM::CMP_SWAP_16:
1904  if (STI->isThumb())
1905  return ExpandCMP_SWAP(MBB, MBBI, ARM::t2LDREXH, ARM::t2STREXH,
1906  ARM::tUXTH, NextMBBI);
1907  else
1908  return ExpandCMP_SWAP(MBB, MBBI, ARM::LDREXH, ARM::STREXH,
1909  ARM::UXTH, NextMBBI);
1910  case ARM::CMP_SWAP_32:
1911  if (STI->isThumb())
1912  return ExpandCMP_SWAP(MBB, MBBI, ARM::t2LDREX, ARM::t2STREX, 0,
1913  NextMBBI);
1914  else
1915  return ExpandCMP_SWAP(MBB, MBBI, ARM::LDREX, ARM::STREX, 0, NextMBBI);
1916 
1917  case ARM::CMP_SWAP_64:
1918  return ExpandCMP_SWAP_64(MBB, MBBI, NextMBBI);
1919 
1920  case ARM::tBL_PUSHLR:
1921  case ARM::BL_PUSHLR: {
1922  const bool Thumb = Opcode == ARM::tBL_PUSHLR;
1923  Register Reg = MI.getOperand(0).getReg();
1924  assert(Reg == ARM::LR && "expect LR register!");
1925  MachineInstrBuilder MIB;
1926  if (Thumb) {
1927  // push {lr}
1928  BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(ARM::tPUSH))
1929  .add(predOps(ARMCC::AL))
1930  .addReg(Reg);
1931 
1932  // bl __gnu_mcount_nc
1933  MIB = BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(ARM::tBL));
1934  } else {
1935  // stmdb sp!, {lr}
1936  BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(ARM::STMDB_UPD))
1937  .addReg(ARM::SP, RegState::Define)
1938  .addReg(ARM::SP)
1939  .add(predOps(ARMCC::AL))
1940  .addReg(Reg);
1941 
1942  // bl __gnu_mcount_nc
1943  MIB = BuildMI(MBB, MBBI, MI.getDebugLoc(), TII->get(ARM::BL));
1944  }
1945  MIB.cloneMemRefs(MI);
1946  for (unsigned i = 1; i < MI.getNumOperands(); ++i) MIB.add(MI.getOperand(i));
1947  MI.eraseFromParent();
1948  return true;
1949  }
1950  }
1951 }
1952 
1953 bool ARMExpandPseudo::ExpandMBB(MachineBasicBlock &MBB) {
1954  bool Modified = false;
1955 
1956  MachineBasicBlock::iterator MBBI = MBB.begin(), E = MBB.end();
1957  while (MBBI != E) {
1958  MachineBasicBlock::iterator NMBBI = std::next(MBBI);
1959  Modified |= ExpandMI(MBB, MBBI, NMBBI);
1960  MBBI = NMBBI;
1961  }
1962 
1963  return Modified;
1964 }
1965 
1966 bool ARMExpandPseudo::runOnMachineFunction(MachineFunction &MF) {
1967  STI = &static_cast<const ARMSubtarget &>(MF.getSubtarget());
1968  TII = STI->getInstrInfo();
1969  TRI = STI->getRegisterInfo();
1970  AFI = MF.getInfo<ARMFunctionInfo>();
1971 
1972  LLVM_DEBUG(dbgs() << "********** ARM EXPAND PSEUDO INSTRUCTIONS **********\n"
1973  << "********** Function: " << MF.getName() << '\n');
1974 
1975  bool Modified = false;
1976  for (MachineBasicBlock &MBB : MF)
1977  Modified |= ExpandMBB(MBB);
1978  if (VerifyARMPseudo)
1979  MF.verify(this, "After expanding ARM pseudo instructions.");
1980 
1981  LLVM_DEBUG(dbgs() << "***************************************************\n");
1982  return Modified;
1983 }
1984 
1985 /// createARMExpandPseudoPass - returns an instance of the pseudo instruction
1986 /// expansion pass.
1987 FunctionPass *llvm::createARMExpandPseudoPass() {
1988  return new ARMExpandPseudo();
1989 }
llvm::MachineOperand::getTargetFlags
unsigned getTargetFlags() const
Definition: MachineOperand.h:218
llvm::lower_bound
auto lower_bound(R &&Range, T &&Value) -> decltype(adl_begin(Range))
Provide wrappers to std::lower_bound which take ranges instead of having to pass begin/end explicitly...
Definition: STLExtras.h:1261
llvm::MachineInstrBuilder::add
const MachineInstrBuilder & add(const MachineOperand &MO) const
Definition: MachineInstrBuilder.h:215
llvm::sys::path::end
const_iterator end(StringRef path)
Get end iterator over path.
Definition: Path.cpp:233
llvm::MachineConstantPool
The MachineConstantPool class keeps track of constants referenced by a function which must be spilled...
Definition: MachineConstantPool.h:120
llvm::sys::path::begin
const_iterator begin(StringRef path, Style style=Style::native)
Get begin iterator over path.
Definition: Path.cpp:224
llvm::ARMConstantPoolSymbol::Create
static ARMConstantPoolSymbol * Create(LLVMContext &C, StringRef s, unsigned ID, unsigned char PCAdj)
Definition: ARMConstantPoolValue.cpp:232
llvm
This class represents lattice values for constants.
Definition: AllocatorList.h:23
VerifyARMPseudo
static cl::opt< bool > VerifyARMPseudo("verify-arm-pseudo-expand", cl::Hidden, cl::desc("Verify machine code after expanding ARM pseudos"))
LookupNEONLdSt
static const NEONLdStTableEntry * LookupNEONLdSt(unsigned Opcode)
LookupNEONLdSt - Search the NEONLdStTable for information about a NEON load or store pseudo instructi...
Definition: ARMExpandPseudoInsts.cpp:415
llvm::MachineInstr::getDebugLoc
const DebugLoc & getDebugLoc() const
Returns the debug location id of this MachineInstr.
Definition: MachineInstr.h:385
llvm::MCInstrDesc
Describe properties that are true of each instruction in the target description file.
Definition: MCInstrDesc.h:178
llvm::MachineOperand::MO_JumpTableIndex
Address of indexed Jump Table for switch.
Definition: MachineOperand.h:61
Reg
unsigned Reg
Definition: MachineSink.cpp:978
llvm::createARMExpandPseudoPass
FunctionPass * createARMExpandPseudoPass()
createARMExpandPseudoPass - returns an instance of the pseudo instruction expansion pass...
Definition: ARMExpandPseudoInsts.cpp:1987
llvm::AArch64_AM::UXTB
Definition: AArch64AddressingModes.h:40
llvm::ARMBaseRegisterInfo::getFrameRegister
Register getFrameRegister(const MachineFunction &MF) const override
Definition: ARMBaseRegisterInfo.cpp:442
llvm::ARMII::MO_GOT
MO_GOT - On a symbol operand, this represents a GOT relative relocation.
Definition: ARMBaseInfo.h:262
llvm::MachineOperand::MO_MachineBasicBlock
MachineBasicBlock reference.
Definition: MachineOperand.h:57
TRI
unsigned const TargetRegisterInfo * TRI
Definition: MachineSink.cpp:979
llvm::DebugLoc
A debug info location.
Definition: DebugLoc.h:33
llvm::MachineOperand::MO_RegisterLiveOut
Mask of live-out registers.
Definition: MachineOperand.h:66
llvm::ARM_AM::getSOImmTwoPartSecond
unsigned getSOImmTwoPartSecond(unsigned V)
getSOImmTwoPartSecond - If V is a value that satisfies isSOImmTwoPartVal, return the second chunk of ...
Definition: ARMAddressingModes.h:199
llvm::MachineOperand::isImm
bool isImm() const
isImm - Tests if this is a MO_Immediate operand.
Definition: MachineOperand.h:316
llvm::MachineOperand::MO_RegisterMask
Mask of preserved registers.
Definition: MachineOperand.h:65
llvm::MachineBasicBlock::erase
instr_iterator erase(instr_iterator I)
Remove an instruction from the instruction list and delete it.
Definition: MachineBasicBlock.cpp:1165
NEONLdStTable
static const NEONLdStTableEntry NEONLdStTable[]
Definition: ARMExpandPseudoInsts.cpp:152
llvm::MachineFunctionPass
MachineFunctionPass - This class adapts the FunctionPass interface to allow convenient creation of pa...
Definition: MachineFunctionPass.h:30
llvm::MCInstrDesc::getNumOperands
unsigned getNumOperands() const
Return the number of declared MachineOperands for this MachineInstruction.
Definition: MCInstrDesc.h:225
TII
const HexagonInstrInfo * TII
Definition: HexagonCopyToCombine.cpp:127
DEBUG_TYPE
#define DEBUG_TYPE
Definition: ARMExpandPseudoInsts.cpp:30
llvm::MachineOperand::MO_CFIIndex
MCCFIInstruction index.
Definition: MachineOperand.h:69
llvm::MachineInstr::getNumOperands
unsigned getNumOperands() const
Retuns the total number of operands.
Definition: MachineInstr.h:414
llvm::TargetFrameLowering::hasFP
virtual bool hasFP(const MachineFunction &MF) const =0
hasFP - Return true if the specified function should have a dedicated frame pointer register...
llvm::MachineOperand::MO_TargetIndex
Target-dependent index+offset operand.
Definition: MachineOperand.h:60
llvm::MachineOperand::setImplicit
void setImplicit(bool Val=true)
Definition: MachineOperand.h:488
llvm::MachineInstr::eraseFromParent
void eraseFromParent()
Unlink &#39;this&#39; from the containing basic block and delete it.
Definition: MachineInstr.cpp:678
llvm::emitT2RegPlusImmediate
void emitT2RegPlusImmediate(MachineBasicBlock &MBB, MachineBasicBlock::iterator &MBBI, const DebugLoc &dl, unsigned DestReg, unsigned BaseReg, int NumBytes, ARMCC::CondCodes Pred, unsigned PredReg, const ARMBaseInstrInfo &TII, unsigned MIFlags=0)
Definition: Thumb2InstrInfo.cpp:231
SubReg
unsigned SubReg
Definition: AArch64AdvSIMDScalarPass.cpp:104
llvm::MachineOperand::MO_ExternalSymbol
Name of external global symbol.
Definition: MachineOperand.h:62
llvm::MachineFrameInfo
The MachineFrameInfo class represents an abstract stack frame until prolog/epilog code is inserted...
Definition: MachineFrameInfo.h:106
llvm::MachineInstr::getOpcode
unsigned getOpcode() const
Returns the opcode of this MachineInstr.
Definition: MachineInstr.h:411
llvm::MachineOperand::getSymbolName
const char * getSymbolName() const
Definition: MachineOperand.h:601
llvm::MachineInstr::getDesc
const MCInstrDesc & getDesc() const
Returns the target instruction descriptor of this MachineInstr.
Definition: MachineInstr.h:408
llvm::predOps
static std::array< MachineOperand, 2 > predOps(ARMCC::CondCodes Pred, unsigned PredReg=0)
Get the operands corresponding to the given Pred value.
Definition: ARMBaseInstrInfo.h:459
llvm::MachineOperand::MO_CImmediate
Immediate >64bit operand.
Definition: MachineOperand.h:55
llvm::MachineInstr::addRegisterKilled
bool addRegisterKilled(Register IncomingReg, const TargetRegisterInfo *RegInfo, bool AddIfNotFound=false)
We have determined MI kills a register.
Definition: MachineInstr.cpp:1782
llvm::TargetRegisterInfo::getSubReg
Register getSubReg(MCRegister Reg, unsigned Idx) const
Returns the physical register number of sub-register "Index" for physical register RegNo...
Definition: TargetRegisterInfo.h:983
llvm::MachineInstrBuilder::addGlobalAddress
const MachineInstrBuilder & addGlobalAddress(const GlobalValue *GV, int64_t Offset=0, unsigned TargetFlags=0) const
Definition: MachineInstrBuilder.h:168
llvm::MachineBasicBlock::getLastNonDebugInstr
iterator getLastNonDebugInstr()
Returns an iterator to the last non-debug instruction in the basic block, or end().
Definition: MachineBasicBlock.cpp:223
llvm::TargetSubtargetInfo::getInstrInfo
virtual const TargetInstrInfo * getInstrInfo() const
Definition: TargetSubtargetInfo.h:95
llvm::getUndefRegState
unsigned getUndefRegState(bool B)
Definition: MachineInstrBuilder.h:482
llvm::MachineFunction::CreateMachineBasicBlock
MachineBasicBlock * CreateMachineBasicBlock(const BasicBlock *bb=nullptr)
CreateMachineBasicBlock - Allocate a new MachineBasicBlock.
Definition: MachineFunction.cpp:386
llvm::getKillRegState
unsigned getKillRegState(bool B)
Definition: MachineInstrBuilder.h:476
llvm::MachineFunction::getName
StringRef getName() const
getName - Return the name of the corresponding LLVM function.
Definition: MachineFunction.cpp:478
llvm::getDeadRegState
unsigned getDeadRegState(bool B)
Definition: MachineInstrBuilder.h:479
llvm::BuildMI
MachineInstrBuilder BuildMI(MachineFunction &MF, const DebugLoc &DL, const MCInstrDesc &MCID)
Builder interface. Specify how to create the initial instruction itself.
Definition: MachineInstrBuilder.h:316
llvm::MachineOperand::MO_GlobalAddress
Address of a global value.
Definition: MachineOperand.h:63
llvm::MachineFunction::getSubtarget
const TargetSubtargetInfo & getSubtarget() const
getSubtarget - Return the subtarget for which this machine code is being compiled.
Definition: MachineFunction.h:464
llvm::MachineFunction::getFrameInfo
MachineFrameInfo & getFrameInfo()
getFrameInfo - Return the frame info object for the current function.
Definition: MachineFunction.h:480
UseMI
MachineInstrBuilder & UseMI
Definition: AArch64ExpandPseudoInsts.cpp:92
E
static GCRegistry::Add< CoreCLRGC > E("coreclr", "CoreCLR-compatible GC")
llvm::MachineOperand::getGlobal
const GlobalValue * getGlobal() const
Definition: MachineOperand.h:556
llvm::MachineFrameInfo::getMaxAlignment
unsigned getMaxAlignment() const
Return the alignment in bytes that this function must be aligned to, which is greater than the defaul...
Definition: MachineFrameInfo.h:564
llvm::MachineOperand::MO_BlockAddress
Address of a basic block.
Definition: MachineOperand.h:64
LLVM_ATTRIBUTE_UNUSED
#define LLVM_ATTRIBUTE_UNUSED
Definition: Compiler.h:172
llvm::MachineFunction::getInfo
Ty * getInfo()
getInfo - Keep track of various per-function pieces of information for backends that would like to do...
Definition: MachineFunction.h:558
llvm::ARMBaseRegisterInfo::hasBasePointer
bool hasBasePointer(const MachineFunction &MF) const
Definition: ARMBaseRegisterInfo.cpp:374
llvm::FunctionPass
FunctionPass class - This class is used to implement most global optimizations.
Definition: Pass.h:284
llvm::ARMCP::GOT_PREL
Thread Local Storage (General Dynamic Mode)
Definition: ARMConstantPoolValue.h:49
llvm::ilist_node_impl::getIterator
self_iterator getIterator()
Definition: ilist_node.h:81
llvm::MachineFunction::getConstantPool
MachineConstantPool * getConstantPool()
getConstantPool - Return the constant pool object for the current function.
Definition: MachineFunction.h:496
llvm::Function::getContext
LLVMContext & getContext() const
getContext - Return a reference to the LLVMContext associated with this function. ...
Definition: Function.cpp:205
llvm::emitARMRegPlusImmediate
void emitARMRegPlusImmediate(MachineBasicBlock &MBB, MachineBasicBlock::iterator &MBBI, const DebugLoc &dl, unsigned DestReg, unsigned BaseReg, int NumBytes, ARMCC::CondCodes Pred, unsigned PredReg, const ARMBaseInstrInfo &TII, unsigned MIFlags=0)
emitARMRegPlusImmediate / emitT2RegPlusImmediate - Emits a series of instructions to materializea des...
Definition: ARMBaseInstrInfo.cpp:2321
llvm::getInstrPredicate
ARMCC::CondCodes getInstrPredicate(const MachineInstr &MI, unsigned &PredReg)
getInstrPredicate - If instruction is predicated, returns its predicate condition, otherwise returns AL.
Definition: ARMBaseInstrInfo.cpp:2089
llvm::TargetRegisterInfo
TargetRegisterInfo base class - We assume that the target defines a static array of TargetRegisterDes...
Definition: TargetRegisterInfo.h:228
LivePhysRegs.h
This file implements the LivePhysRegs utility for tracking liveness of physical registers.
llvm::MachineConstantPoolValue
Abstract base class for all machine specific constantpool value subclasses.
Definition: MachineConstantPool.h:34
llvm_unreachable
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
Definition: ErrorHandling.h:135
llvm::ARMII::MO_LO16
MO_LO16 - On a symbol operand, this represents a relocation containing lower 16 bit of the address...
Definition: ARMBaseInfo.h:246
llvm::MachineOperand::setIsKill
void setIsKill(bool Val=true)
Definition: MachineOperand.h:493
llvm::ARM_AM::asr
Definition: ARMAddressingModes.h:29
llvm::MachineBasicBlock::addSuccessor
void addSuccessor(MachineBasicBlock *Succ, BranchProbability Prob=BranchProbability::getUnknown())
Add Succ as a successor of this MachineBasicBlock.
Definition: MachineBasicBlock.cpp:655
R6
#define R6(n)
llvm::MachineOperand::isGlobal
bool isGlobal() const
isGlobal - Tests if this is a MO_GlobalAddress operand.
Definition: MachineOperand.h:332
llvm::MachineOperand::MO_Predicate
Generic predicate for ISel.
Definition: MachineOperand.h:71
add
static uint64_t add(uint64_t LeftOp, uint64_t RightOp)
Definition: FileCheck.cpp:243
llvm::MachineOperand
MachineOperand class - Representation of each machine instruction operand.
Definition: MachineOperand.h:50
DefMI
MachineInstrBuilder MachineInstrBuilder & DefMI
Definition: AArch64ExpandPseudoInsts.cpp:93
addExclusiveRegPair
static void addExclusiveRegPair(MachineInstrBuilder &MIB, MachineOperand &Reg, unsigned Flags, bool IsThumb, const TargetRegisterInfo *TRI)
ARM&#39;s ldrexd/strexd take a consecutive register pair (represented as a single GPRPair register)...
Definition: ARMExpandPseudoInsts.cpp:1035
llvm::ARM_AM::getSORegOpc
unsigned getSORegOpc(ShiftOpc ShOp, unsigned Imm)
Definition: ARMAddressingModes.h:112
llvm::MachineInstrBuilder::getInstr
MachineInstr * getInstr() const
If conversion operators fail, use this method to get the MachineInstr explicitly. ...
Definition: MachineInstrBuilder.h:80
llvm::MachineOperand::getImm
int64_t getImm() const
Definition: MachineOperand.h:530
llvm::MachineFunction::getFunction
const Function & getFunction() const
Return the LLVM function that this machine code represents.
Definition: MachineFunction.h:451
llvm::dbgs
raw_ostream & dbgs()
dbgs() - This returns a reference to a raw_ostream for debugging messages.
Definition: Debug.cpp:132
llvm::MachineOperand::MO_MCSymbol
MCSymbol reference (for debug/eh info)
Definition: MachineOperand.h:68
llvm::ARM_AM::rrx
Definition: ARMAddressingModes.h:33
llvm::computeAndAddLiveIns
void computeAndAddLiveIns(LivePhysRegs &LiveRegs, MachineBasicBlock &MBB)
Convenience function combining computeLiveIns() and addLiveIns().
Definition: LivePhysRegs.cpp:326
llvm::MachineInstr::getParent
const MachineBasicBlock * getParent() const
Definition: MachineInstr.h:256
llvm::MachineFunctionProperties::set
MachineFunctionProperties & set(Property P)
Definition: MachineFunction.h:161
llvm::MachineInstr
Representation of each machine instruction.
Definition: MachineInstr.h:64
llvm::MachineBasicBlock::getParent
const MachineFunction * getParent() const
Return the MachineFunction containing this basic block.
Definition: MachineBasicBlock.h:173
llvm::MachineInstrBuilder::addImm
const MachineInstrBuilder & addImm(int64_t Val) const
Add a new immediate operand.
Definition: MachineInstrBuilder.h:122
llvm::AArch64_AM::UXTH
Definition: AArch64AddressingModes.h:41
llvm::condCodeOp
static MachineOperand condCodeOp(unsigned CCReg=0)
Get the operand corresponding to the conditional code result.
Definition: ARMBaseInstrInfo.h:467
llvm::LivePhysRegs
A set of physical registers with utility functions to track liveness when walking backward/forward th...
Definition: LivePhysRegs.h:48
GetDSubRegs
static void GetDSubRegs(unsigned Reg, NEONRegSpacing RegSpc, const TargetRegisterInfo *TRI, unsigned &D0, unsigned &D1, unsigned &D2, unsigned &D3)
GetDSubRegs - Get 4 D subregisters of a Q, QQ, or QQQQ register, corresponding to the specified regis...
Definition: ARMExpandPseudoInsts.cpp:435
llvm::ARM_AM::lsr
Definition: ARMAddressingModes.h:31
llvm::ARMFunctionInfo
ARMFunctionInfo - This class is derived from MachineFunctionInfo and contains private ARM-specific in...
Definition: ARMMachineFunctionInfo.h:26
llvm::MachineOperand::getOffset
int64_t getOffset() const
Return the offset from the symbol in this operand.
Definition: MachineOperand.h:593
I
#define I(x, y, z)
Definition: MD5.cpp:58
llvm::MachineInstrBuilder::cloneMemRefs
const MachineInstrBuilder & cloneMemRefs(const MachineInstr &OtherMI) const
Definition: MachineInstrBuilder.h:204
llvm::TargetSubtargetInfo::getFrameLowering
virtual const TargetFrameLowering * getFrameLowering() const
Definition: TargetSubtargetInfo.h:96
llvm::emitThumbRegPlusImmediate
void emitThumbRegPlusImmediate(MachineBasicBlock &MBB, MachineBasicBlock::iterator &MBBI, const DebugLoc &dl, unsigned DestReg, unsigned BaseReg, int NumBytes, const TargetInstrInfo &TII, const ARMBaseRegisterInfo &MRI, unsigned MIFlags=0)
emitThumbRegPlusImmediate - Emits a series of instructions to materialize a destreg = basereg + immed...
Definition: ThumbRegisterInfo.cpp:186
llvm::MachineBasicBlock::getBasicBlock
const BasicBlock * getBasicBlock() const
Return the LLVM basic block that this instance corresponded to originally.
Definition: MachineBasicBlock.h:150
ARM_EXPAND_PSEUDO_NAME
#define ARM_EXPAND_PSEUDO_NAME
Definition: ARMExpandPseudoInsts.cpp:36
llvm::MachineOperand::MO_FrameIndex
Abstract Stack Frame Index.
Definition: MachineOperand.h:58
llvm::MachineOperand::isSymbol
bool isSymbol() const
isSymbol - Tests if this is a MO_ExternalSymbol operand.
Definition: MachineOperand.h:334
llvm::MachineOperand::isReg
bool isReg() const
isReg - Tests if this is a MO_Register operand.
Definition: MachineOperand.h:314
assert
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
llvm::MachineFunction::insert
void insert(iterator MBBI, MachineBasicBlock *MBB)
Definition: MachineFunction.h:657
llvm::operator<
bool operator<(int64_t V1, const APSInt &V2)
Definition: APSInt.h:343
llvm::ARMBaseInstrInfo::getRegisterInfo
virtual const ARMBaseRegisterInfo & getRegisterInfo() const =0
llvm::MachineOperand::MO_FPImmediate
Floating-point immediate operand.
Definition: MachineOperand.h:56
INITIALIZE_PASS
INITIALIZE_PASS(ARMExpandPseudo, DEBUG_TYPE, ARM_EXPAND_PSEUDO_NAME, false, false) void ARMExpandPseudo
TransferImpOps - Transfer implicit operands on the pseudo instruction to the instructions created fro...
Definition: ARMExpandPseudoInsts.cpp:86
IsAnAddressOperand
static bool IsAnAddressOperand(const MachineOperand &MO)
Definition: ARMExpandPseudoInsts.cpp:783
MI
IRTranslator LLVM IR MI
Definition: IRTranslator.cpp:91
llvm::StringRef
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:48
llvm::MachineOperand::MO_ConstantPoolIndex
Address of indexed Constant in Constant Pool.
Definition: MachineOperand.h:59
llvm::MachineOperand::getReg
Register getReg() const
getReg - Returns the register number.
Definition: MachineOperand.h:353
LLVM_DEBUG
#define LLVM_DEBUG(X)
Definition: Debug.h:122
llvm::MachineInstr::getOperand
const MachineOperand & getOperand(unsigned i) const
Definition: MachineInstr.h:416
llvm::finalizeBundle
void finalizeBundle(MachineBasicBlock &MBB, MachineBasicBlock::instr_iterator FirstMI, MachineBasicBlock::instr_iterator LastMI)
finalizeBundle - Finalize a machine instruction bundle which includes a sequence of instructions star...
Definition: MachineInstrBundle.cpp:124
llvm::MachineOperand::getType
MachineOperandType getType() const
getType - Returns the MachineOperandType for this operand.
Definition: MachineOperand.h:216
llvm::ARM_AM::getSOImmTwoPartFirst
unsigned getSOImmTwoPartFirst(unsigned V)
getSOImmTwoPartFirst - If V is a value that satisfies isSOImmTwoPartVal, return the first chunk of it...
Definition: ARMAddressingModes.h:193
llvm::MachineInstrBuilder::addReg
const MachineInstrBuilder & addReg(Register RegNo, unsigned flags=0, unsigned SubReg=0) const
Add a new virtual register operand.
Definition: MachineInstrBuilder.h:88
llvm::MachineOperand::MO_ShuffleMask
Other IR Constant for ISel (shuffle masks)
Definition: MachineOperand.h:72
llvm::ARMConstantPoolConstant::Create
static ARMConstantPoolConstant * Create(const Constant *C, unsigned ID)
Definition: ARMConstantPoolValue.cpp:147
llvm::MachineConstantPool::getConstantPoolIndex
unsigned getConstantPoolIndex(const Constant *C, unsigned Alignment)
getConstantPoolIndex - Create a new entry in the constant pool or return an existing one...
Definition: MachineFunction.cpp:1055
makeImplicit
static MachineOperand makeImplicit(const MachineOperand &MO)
Definition: ARMExpandPseudoInsts.cpp:820
llvm::MachineInstrBuilder::addExternalSymbol
const MachineInstrBuilder & addExternalSymbol(const char *FnName, unsigned TargetFlags=0) const
Definition: MachineInstrBuilder.h:175
llvm::ARMII::MO_HI16
MO_HI16 - On a symbol operand, this represents a relocation containing higher 16 bit of the address...
Definition: ARMBaseInfo.h:250
llvm::MachineFunctionProperties
Properties which a MachineFunction may have at a given point in time.
Definition: MachineFunction.h:109
llvm::Register
Wrapper class representing virtual and physical registers.
Definition: Register.h:19
llvm::MachineOperand::MO_Metadata
Metadata reference (for debug info)
Definition: MachineOperand.h:67
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