LLVM  6.0.0svn
AVRExpandPseudoInsts.cpp
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1 //===-- AVRExpandPseudoInsts.cpp - Expand pseudo instructions -------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file contains a pass that expands pseudo instructions into target
11 // instructions. This pass should be run after register allocation but before
12 // the post-regalloc scheduling pass.
13 //
14 //===----------------------------------------------------------------------===//
15 
16 #include "AVR.h"
17 #include "AVRInstrInfo.h"
18 #include "AVRTargetMachine.h"
19 #include "MCTargetDesc/AVRMCTargetDesc.h"
20 
21 #include "llvm/CodeGen/MachineFunctionPass.h"
22 #include "llvm/CodeGen/MachineInstrBuilder.h"
23 #include "llvm/CodeGen/MachineRegisterInfo.h"
24 #include "llvm/CodeGen/RegisterScavenging.h"
25 #include "llvm/Target/TargetRegisterInfo.h"
26 
27 using namespace llvm;
28 
29 #define AVR_EXPAND_PSEUDO_NAME "AVR pseudo instruction expansion pass"
30 
31 namespace {
32 
33 /// Expands "placeholder" instructions marked as pseudo into
34 /// actual AVR instructions.
35 class AVRExpandPseudo : public MachineFunctionPass {
36 public:
37  static char ID;
38 
39  AVRExpandPseudo() : MachineFunctionPass(ID) {
40  initializeAVRExpandPseudoPass(*PassRegistry::getPassRegistry());
41  }
42 
43  bool runOnMachineFunction(MachineFunction &MF) override;
44 
45  StringRef getPassName() const override { return AVR_EXPAND_PSEUDO_NAME; }
46 
47 private:
48  typedef MachineBasicBlock Block;
49  typedef Block::iterator BlockIt;
50 
51  const AVRRegisterInfo *TRI;
52  const TargetInstrInfo *TII;
53 
54  /// The register to be used for temporary storage.
55  const unsigned SCRATCH_REGISTER = AVR::R0;
56  /// The IO address of the status register.
57  const unsigned SREG_ADDR = 0x3f;
58 
59  bool expandMBB(Block &MBB);
60  bool expandMI(Block &MBB, BlockIt MBBI);
61  template <unsigned OP> bool expand(Block &MBB, BlockIt MBBI);
62 
63  MachineInstrBuilder buildMI(Block &MBB, BlockIt MBBI, unsigned Opcode) {
64  return BuildMI(MBB, MBBI, MBBI->getDebugLoc(), TII->get(Opcode));
65  }
66 
67  MachineInstrBuilder buildMI(Block &MBB, BlockIt MBBI, unsigned Opcode,
68  unsigned DstReg) {
69  return BuildMI(MBB, MBBI, MBBI->getDebugLoc(), TII->get(Opcode), DstReg);
70  }
71 
72  MachineRegisterInfo &getRegInfo(Block &MBB) { return MBB.getParent()->getRegInfo(); }
73 
74  bool expandArith(unsigned OpLo, unsigned OpHi, Block &MBB, BlockIt MBBI);
75  bool expandLogic(unsigned Op, Block &MBB, BlockIt MBBI);
76  bool expandLogicImm(unsigned Op, Block &MBB, BlockIt MBBI);
77  bool isLogicImmOpRedundant(unsigned Op, unsigned ImmVal) const;
78 
79  template<typename Func>
80  bool expandAtomic(Block &MBB, BlockIt MBBI, Func f);
81 
82  template<typename Func>
83  bool expandAtomicBinaryOp(unsigned Opcode, Block &MBB, BlockIt MBBI, Func f);
84 
85  bool expandAtomicBinaryOp(unsigned Opcode, Block &MBB, BlockIt MBBI);
86 
87  bool expandAtomicArithmeticOp(unsigned MemOpcode,
88  unsigned ArithOpcode,
89  Block &MBB,
90  BlockIt MBBI);
91 
92  /// Scavenges a free GPR8 register for use.
93  unsigned scavengeGPR8(MachineInstr &MI);
94 };
95 
96 char AVRExpandPseudo::ID = 0;
97 
98 bool AVRExpandPseudo::expandMBB(MachineBasicBlock &MBB) {
99  bool Modified = false;
100 
101  BlockIt MBBI = MBB.begin(), E = MBB.end();
102  while (MBBI != E) {
103  BlockIt NMBBI = std::next(MBBI);
104  Modified |= expandMI(MBB, MBBI);
105  MBBI = NMBBI;
106  }
107 
108  return Modified;
109 }
110 
111 bool AVRExpandPseudo::runOnMachineFunction(MachineFunction &MF) {
112  bool Modified = false;
113 
114  const AVRSubtarget &STI = MF.getSubtarget<AVRSubtarget>();
115  TRI = STI.getRegisterInfo();
116  TII = STI.getInstrInfo();
117 
118  // We need to track liveness in order to use register scavenging.
119  MF.getProperties().set(MachineFunctionProperties::Property::TracksLiveness);
120 
121  for (Block &MBB : MF) {
122  bool ContinueExpanding = true;
123  unsigned ExpandCount = 0;
124 
125  // Continue expanding the block until all pseudos are expanded.
126  do {
127  assert(ExpandCount < 10 && "pseudo expand limit reached");
128 
129  bool BlockModified = expandMBB(MBB);
130  Modified |= BlockModified;
131  ExpandCount++;
132 
133  ContinueExpanding = BlockModified;
134  } while (ContinueExpanding);
135  }
136 
137  return Modified;
138 }
139 
140 bool AVRExpandPseudo::
141 expandArith(unsigned OpLo, unsigned OpHi, Block &MBB, BlockIt MBBI) {
142  MachineInstr &MI = *MBBI;
143  unsigned SrcLoReg, SrcHiReg, DstLoReg, DstHiReg;
144  unsigned DstReg = MI.getOperand(0).getReg();
145  unsigned SrcReg = MI.getOperand(2).getReg();
146  bool DstIsDead = MI.getOperand(0).isDead();
147  bool DstIsKill = MI.getOperand(1).isKill();
148  bool SrcIsKill = MI.getOperand(2).isKill();
149  bool ImpIsDead = MI.getOperand(3).isDead();
150  TRI->splitReg(SrcReg, SrcLoReg, SrcHiReg);
151  TRI->splitReg(DstReg, DstLoReg, DstHiReg);
152 
153  buildMI(MBB, MBBI, OpLo)
154  .addReg(DstLoReg, RegState::Define | getDeadRegState(DstIsDead))
155  .addReg(DstLoReg, getKillRegState(DstIsKill))
156  .addReg(SrcLoReg, getKillRegState(SrcIsKill));
157 
158  auto MIBHI = buildMI(MBB, MBBI, OpHi)
159  .addReg(DstHiReg, RegState::Define | getDeadRegState(DstIsDead))
160  .addReg(DstHiReg, getKillRegState(DstIsKill))
161  .addReg(SrcHiReg, getKillRegState(SrcIsKill));
162 
163  if (ImpIsDead)
164  MIBHI->getOperand(3).setIsDead();
165 
166  // SREG is always implicitly killed
167  MIBHI->getOperand(4).setIsKill();
168 
169  MI.eraseFromParent();
170  return true;
171 }
172 
173 bool AVRExpandPseudo::
174 expandLogic(unsigned Op, Block &MBB, BlockIt MBBI) {
175  MachineInstr &MI = *MBBI;
176  unsigned SrcLoReg, SrcHiReg, DstLoReg, DstHiReg;
177  unsigned DstReg = MI.getOperand(0).getReg();
178  unsigned SrcReg = MI.getOperand(2).getReg();
179  bool DstIsDead = MI.getOperand(0).isDead();
180  bool DstIsKill = MI.getOperand(1).isKill();
181  bool SrcIsKill = MI.getOperand(2).isKill();
182  bool ImpIsDead = MI.getOperand(3).isDead();
183  TRI->splitReg(SrcReg, SrcLoReg, SrcHiReg);
184  TRI->splitReg(DstReg, DstLoReg, DstHiReg);
185 
186  auto MIBLO = buildMI(MBB, MBBI, Op)
187  .addReg(DstLoReg, RegState::Define | getDeadRegState(DstIsDead))
188  .addReg(DstLoReg, getKillRegState(DstIsKill))
189  .addReg(SrcLoReg, getKillRegState(SrcIsKill));
190 
191  // SREG is always implicitly dead
192  MIBLO->getOperand(3).setIsDead();
193 
194  auto MIBHI = buildMI(MBB, MBBI, Op)
195  .addReg(DstHiReg, RegState::Define | getDeadRegState(DstIsDead))
196  .addReg(DstHiReg, getKillRegState(DstIsKill))
197  .addReg(SrcHiReg, getKillRegState(SrcIsKill));
198 
199  if (ImpIsDead)
200  MIBHI->getOperand(3).setIsDead();
201 
202  MI.eraseFromParent();
203  return true;
204 }
205 
206 bool AVRExpandPseudo::
207  isLogicImmOpRedundant(unsigned Op, unsigned ImmVal) const {
208 
209  // ANDI Rd, 0xff is redundant.
210  if (Op == AVR::ANDIRdK && ImmVal == 0xff)
211  return true;
212 
213  // ORI Rd, 0x0 is redundant.
214  if (Op == AVR::ORIRdK && ImmVal == 0x0)
215  return true;
216 
217  return false;
218 }
219 
220 bool AVRExpandPseudo::
221 expandLogicImm(unsigned Op, Block &MBB, BlockIt MBBI) {
222  MachineInstr &MI = *MBBI;
223  unsigned DstLoReg, DstHiReg;
224  unsigned DstReg = MI.getOperand(0).getReg();
225  bool DstIsDead = MI.getOperand(0).isDead();
226  bool SrcIsKill = MI.getOperand(1).isKill();
227  bool ImpIsDead = MI.getOperand(3).isDead();
228  unsigned Imm = MI.getOperand(2).getImm();
229  unsigned Lo8 = Imm & 0xff;
230  unsigned Hi8 = (Imm >> 8) & 0xff;
231  TRI->splitReg(DstReg, DstLoReg, DstHiReg);
232 
233  if (!isLogicImmOpRedundant(Op, Lo8)) {
234  auto MIBLO = buildMI(MBB, MBBI, Op)
235  .addReg(DstLoReg, RegState::Define | getDeadRegState(DstIsDead))
236  .addReg(DstLoReg, getKillRegState(SrcIsKill))
237  .addImm(Lo8);
238 
239  // SREG is always implicitly dead
240  MIBLO->getOperand(3).setIsDead();
241  }
242 
243  if (!isLogicImmOpRedundant(Op, Hi8)) {
244  auto MIBHI = buildMI(MBB, MBBI, Op)
245  .addReg(DstHiReg, RegState::Define | getDeadRegState(DstIsDead))
246  .addReg(DstHiReg, getKillRegState(SrcIsKill))
247  .addImm(Hi8);
248 
249  if (ImpIsDead)
250  MIBHI->getOperand(3).setIsDead();
251  }
252 
253  MI.eraseFromParent();
254  return true;
255 }
256 
257 template <>
258 bool AVRExpandPseudo::expand<AVR::ADDWRdRr>(Block &MBB, BlockIt MBBI) {
259  return expandArith(AVR::ADDRdRr, AVR::ADCRdRr, MBB, MBBI);
260 }
261 
262 template <>
263 bool AVRExpandPseudo::expand<AVR::ADCWRdRr>(Block &MBB, BlockIt MBBI) {
264  return expandArith(AVR::ADCRdRr, AVR::ADCRdRr, MBB, MBBI);
265 }
266 
267 template <>
268 bool AVRExpandPseudo::expand<AVR::SUBWRdRr>(Block &MBB, BlockIt MBBI) {
269  return expandArith(AVR::SUBRdRr, AVR::SBCRdRr, MBB, MBBI);
270 }
271 
272 template <>
273 bool AVRExpandPseudo::expand<AVR::SUBIWRdK>(Block &MBB, BlockIt MBBI) {
274  MachineInstr &MI = *MBBI;
275  unsigned DstLoReg, DstHiReg;
276  unsigned DstReg = MI.getOperand(0).getReg();
277  bool DstIsDead = MI.getOperand(0).isDead();
278  bool SrcIsKill = MI.getOperand(1).isKill();
279  bool ImpIsDead = MI.getOperand(3).isDead();
280  TRI->splitReg(DstReg, DstLoReg, DstHiReg);
281 
282  auto MIBLO = buildMI(MBB, MBBI, AVR::SUBIRdK)
283  .addReg(DstLoReg, RegState::Define | getDeadRegState(DstIsDead))
284  .addReg(DstLoReg, getKillRegState(SrcIsKill));
285 
286  auto MIBHI = buildMI(MBB, MBBI, AVR::SBCIRdK)
287  .addReg(DstHiReg, RegState::Define | getDeadRegState(DstIsDead))
288  .addReg(DstHiReg, getKillRegState(SrcIsKill));
289 
290  switch (MI.getOperand(2).getType()) {
291  case MachineOperand::MO_GlobalAddress: {
292  const GlobalValue *GV = MI.getOperand(2).getGlobal();
293  int64_t Offs = MI.getOperand(2).getOffset();
294  unsigned TF = MI.getOperand(2).getTargetFlags();
295  MIBLO.addGlobalAddress(GV, Offs, TF | AVRII::MO_NEG | AVRII::MO_LO);
296  MIBHI.addGlobalAddress(GV, Offs, TF | AVRII::MO_NEG | AVRII::MO_HI);
297  break;
298  }
299  case MachineOperand::MO_Immediate: {
300  unsigned Imm = MI.getOperand(2).getImm();
301  MIBLO.addImm(Imm & 0xff);
302  MIBHI.addImm((Imm >> 8) & 0xff);
303  break;
304  }
305  default:
306  llvm_unreachable("Unknown operand type!");
307  }
308 
309  if (ImpIsDead)
310  MIBHI->getOperand(3).setIsDead();
311 
312  // SREG is always implicitly killed
313  MIBHI->getOperand(4).setIsKill();
314 
315  MI.eraseFromParent();
316  return true;
317 }
318 
319 template <>
320 bool AVRExpandPseudo::expand<AVR::SBCWRdRr>(Block &MBB, BlockIt MBBI) {
321  return expandArith(AVR::SBCRdRr, AVR::SBCRdRr, MBB, MBBI);
322 }
323 
324 template <>
325 bool AVRExpandPseudo::expand<AVR::SBCIWRdK>(Block &MBB, BlockIt MBBI) {
326  MachineInstr &MI = *MBBI;
327  unsigned OpLo, OpHi, DstLoReg, DstHiReg;
328  unsigned DstReg = MI.getOperand(0).getReg();
329  bool DstIsDead = MI.getOperand(0).isDead();
330  bool SrcIsKill = MI.getOperand(1).isKill();
331  bool ImpIsDead = MI.getOperand(3).isDead();
332  unsigned Imm = MI.getOperand(2).getImm();
333  unsigned Lo8 = Imm & 0xff;
334  unsigned Hi8 = (Imm >> 8) & 0xff;
335  OpLo = AVR::SBCIRdK;
336  OpHi = AVR::SBCIRdK;
337  TRI->splitReg(DstReg, DstLoReg, DstHiReg);
338 
339  auto MIBLO = buildMI(MBB, MBBI, OpLo)
340  .addReg(DstLoReg, RegState::Define | getDeadRegState(DstIsDead))
341  .addReg(DstLoReg, getKillRegState(SrcIsKill))
342  .addImm(Lo8);
343 
344  // SREG is always implicitly killed
345  MIBLO->getOperand(4).setIsKill();
346 
347  auto MIBHI = buildMI(MBB, MBBI, OpHi)
348  .addReg(DstHiReg, RegState::Define | getDeadRegState(DstIsDead))
349  .addReg(DstHiReg, getKillRegState(SrcIsKill))
350  .addImm(Hi8);
351 
352  if (ImpIsDead)
353  MIBHI->getOperand(3).setIsDead();
354 
355  // SREG is always implicitly killed
356  MIBHI->getOperand(4).setIsKill();
357 
358  MI.eraseFromParent();
359  return true;
360 }
361 
362 template <>
363 bool AVRExpandPseudo::expand<AVR::ANDWRdRr>(Block &MBB, BlockIt MBBI) {
364  return expandLogic(AVR::ANDRdRr, MBB, MBBI);
365 }
366 
367 template <>
368 bool AVRExpandPseudo::expand<AVR::ANDIWRdK>(Block &MBB, BlockIt MBBI) {
369  return expandLogicImm(AVR::ANDIRdK, MBB, MBBI);
370 }
371 
372 template <>
373 bool AVRExpandPseudo::expand<AVR::ORWRdRr>(Block &MBB, BlockIt MBBI) {
374  return expandLogic(AVR::ORRdRr, MBB, MBBI);
375 }
376 
377 template <>
378 bool AVRExpandPseudo::expand<AVR::ORIWRdK>(Block &MBB, BlockIt MBBI) {
379  return expandLogicImm(AVR::ORIRdK, MBB, MBBI);
380 }
381 
382 template <>
383 bool AVRExpandPseudo::expand<AVR::EORWRdRr>(Block &MBB, BlockIt MBBI) {
384  return expandLogic(AVR::EORRdRr, MBB, MBBI);
385 }
386 
387 template <>
388 bool AVRExpandPseudo::expand<AVR::COMWRd>(Block &MBB, BlockIt MBBI) {
389  MachineInstr &MI = *MBBI;
390  unsigned OpLo, OpHi, DstLoReg, DstHiReg;
391  unsigned DstReg = MI.getOperand(0).getReg();
392  bool DstIsDead = MI.getOperand(0).isDead();
393  bool DstIsKill = MI.getOperand(1).isKill();
394  bool ImpIsDead = MI.getOperand(2).isDead();
395  OpLo = AVR::COMRd;
396  OpHi = AVR::COMRd;
397  TRI->splitReg(DstReg, DstLoReg, DstHiReg);
398 
399  auto MIBLO = buildMI(MBB, MBBI, OpLo)
400  .addReg(DstLoReg, RegState::Define | getDeadRegState(DstIsDead))
401  .addReg(DstLoReg, getKillRegState(DstIsKill));
402 
403  // SREG is always implicitly dead
404  MIBLO->getOperand(2).setIsDead();
405 
406  auto MIBHI = buildMI(MBB, MBBI, OpHi)
407  .addReg(DstHiReg, RegState::Define | getDeadRegState(DstIsDead))
408  .addReg(DstHiReg, getKillRegState(DstIsKill));
409 
410  if (ImpIsDead)
411  MIBHI->getOperand(2).setIsDead();
412 
413  MI.eraseFromParent();
414  return true;
415 }
416 
417 template <>
418 bool AVRExpandPseudo::expand<AVR::CPWRdRr>(Block &MBB, BlockIt MBBI) {
419  MachineInstr &MI = *MBBI;
420  unsigned OpLo, OpHi, SrcLoReg, SrcHiReg, DstLoReg, DstHiReg;
421  unsigned DstReg = MI.getOperand(0).getReg();
422  unsigned SrcReg = MI.getOperand(1).getReg();
423  bool DstIsKill = MI.getOperand(0).isKill();
424  bool SrcIsKill = MI.getOperand(1).isKill();
425  bool ImpIsDead = MI.getOperand(2).isDead();
426  OpLo = AVR::CPRdRr;
427  OpHi = AVR::CPCRdRr;
428  TRI->splitReg(SrcReg, SrcLoReg, SrcHiReg);
429  TRI->splitReg(DstReg, DstLoReg, DstHiReg);
430 
431  // Low part
432  buildMI(MBB, MBBI, OpLo)
433  .addReg(DstLoReg, getKillRegState(DstIsKill))
434  .addReg(SrcLoReg, getKillRegState(SrcIsKill));
435 
436  auto MIBHI = buildMI(MBB, MBBI, OpHi)
437  .addReg(DstHiReg, getKillRegState(DstIsKill))
438  .addReg(SrcHiReg, getKillRegState(SrcIsKill));
439 
440  if (ImpIsDead)
441  MIBHI->getOperand(2).setIsDead();
442 
443  // SREG is always implicitly killed
444  MIBHI->getOperand(3).setIsKill();
445 
446  MI.eraseFromParent();
447  return true;
448 }
449 
450 template <>
451 bool AVRExpandPseudo::expand<AVR::CPCWRdRr>(Block &MBB, BlockIt MBBI) {
452  MachineInstr &MI = *MBBI;
453  unsigned OpLo, OpHi, SrcLoReg, SrcHiReg, DstLoReg, DstHiReg;
454  unsigned DstReg = MI.getOperand(0).getReg();
455  unsigned SrcReg = MI.getOperand(1).getReg();
456  bool DstIsKill = MI.getOperand(0).isKill();
457  bool SrcIsKill = MI.getOperand(1).isKill();
458  bool ImpIsDead = MI.getOperand(2).isDead();
459  OpLo = AVR::CPCRdRr;
460  OpHi = AVR::CPCRdRr;
461  TRI->splitReg(SrcReg, SrcLoReg, SrcHiReg);
462  TRI->splitReg(DstReg, DstLoReg, DstHiReg);
463 
464  auto MIBLO = buildMI(MBB, MBBI, OpLo)
465  .addReg(DstLoReg, getKillRegState(DstIsKill))
466  .addReg(SrcLoReg, getKillRegState(SrcIsKill));
467 
468  // SREG is always implicitly killed
469  MIBLO->getOperand(3).setIsKill();
470 
471  auto MIBHI = buildMI(MBB, MBBI, OpHi)
472  .addReg(DstHiReg, getKillRegState(DstIsKill))
473  .addReg(SrcHiReg, getKillRegState(SrcIsKill));
474 
475  if (ImpIsDead)
476  MIBHI->getOperand(2).setIsDead();
477 
478  // SREG is always implicitly killed
479  MIBHI->getOperand(3).setIsKill();
480 
481  MI.eraseFromParent();
482  return true;
483 }
484 
485 template <>
486 bool AVRExpandPseudo::expand<AVR::LDIWRdK>(Block &MBB, BlockIt MBBI) {
487  MachineInstr &MI = *MBBI;
488  unsigned OpLo, OpHi, DstLoReg, DstHiReg;
489  unsigned DstReg = MI.getOperand(0).getReg();
490  bool DstIsDead = MI.getOperand(0).isDead();
491  OpLo = AVR::LDIRdK;
492  OpHi = AVR::LDIRdK;
493  TRI->splitReg(DstReg, DstLoReg, DstHiReg);
494 
495  auto MIBLO = buildMI(MBB, MBBI, OpLo)
496  .addReg(DstLoReg, RegState::Define | getDeadRegState(DstIsDead));
497 
498  auto MIBHI = buildMI(MBB, MBBI, OpHi)
499  .addReg(DstHiReg, RegState::Define | getDeadRegState(DstIsDead));
500 
501  switch (MI.getOperand(1).getType()) {
502  case MachineOperand::MO_GlobalAddress: {
503  const GlobalValue *GV = MI.getOperand(1).getGlobal();
504  int64_t Offs = MI.getOperand(1).getOffset();
505  unsigned TF = MI.getOperand(1).getTargetFlags();
506 
507  MIBLO.addGlobalAddress(GV, Offs, TF | AVRII::MO_LO);
508  MIBHI.addGlobalAddress(GV, Offs, TF | AVRII::MO_HI);
509  break;
510  }
511  case MachineOperand::MO_BlockAddress: {
512  const BlockAddress *BA = MI.getOperand(1).getBlockAddress();
513  unsigned TF = MI.getOperand(1).getTargetFlags();
514 
515  MIBLO.add(MachineOperand::CreateBA(BA, TF | AVRII::MO_LO));
516  MIBHI.add(MachineOperand::CreateBA(BA, TF | AVRII::MO_HI));
517  break;
518  }
519  case MachineOperand::MO_Immediate: {
520  unsigned Imm = MI.getOperand(1).getImm();
521 
522  MIBLO.addImm(Imm & 0xff);
523  MIBHI.addImm((Imm >> 8) & 0xff);
524  break;
525  }
526  default:
527  llvm_unreachable("Unknown operand type!");
528  }
529 
530  MI.eraseFromParent();
531  return true;
532 }
533 
534 template <>
535 bool AVRExpandPseudo::expand<AVR::LDSWRdK>(Block &MBB, BlockIt MBBI) {
536  MachineInstr &MI = *MBBI;
537  unsigned OpLo, OpHi, DstLoReg, DstHiReg;
538  unsigned DstReg = MI.getOperand(0).getReg();
539  bool DstIsDead = MI.getOperand(0).isDead();
540  OpLo = AVR::LDSRdK;
541  OpHi = AVR::LDSRdK;
542  TRI->splitReg(DstReg, DstLoReg, DstHiReg);
543 
544  auto MIBLO = buildMI(MBB, MBBI, OpLo)
545  .addReg(DstLoReg, RegState::Define | getDeadRegState(DstIsDead));
546 
547  auto MIBHI = buildMI(MBB, MBBI, OpHi)
548  .addReg(DstHiReg, RegState::Define | getDeadRegState(DstIsDead));
549 
550  switch (MI.getOperand(1).getType()) {
551  case MachineOperand::MO_GlobalAddress: {
552  const GlobalValue *GV = MI.getOperand(1).getGlobal();
553  int64_t Offs = MI.getOperand(1).getOffset();
554  unsigned TF = MI.getOperand(1).getTargetFlags();
555 
556  MIBLO.addGlobalAddress(GV, Offs, TF);
557  MIBHI.addGlobalAddress(GV, Offs + 1, TF);
558  break;
559  }
560  case MachineOperand::MO_Immediate: {
561  unsigned Imm = MI.getOperand(1).getImm();
562 
563  MIBLO.addImm(Imm);
564  MIBHI.addImm(Imm + 1);
565  break;
566  }
567  default:
568  llvm_unreachable("Unknown operand type!");
569  }
570 
571  MIBLO->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
572  MIBHI->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
573 
574  MI.eraseFromParent();
575  return true;
576 }
577 
578 template <>
579 bool AVRExpandPseudo::expand<AVR::LDWRdPtr>(Block &MBB, BlockIt MBBI) {
580  MachineInstr &MI = *MBBI;
581  unsigned OpLo, OpHi, DstLoReg, DstHiReg;
582  unsigned DstReg = MI.getOperand(0).getReg();
583  unsigned TmpReg = 0; // 0 for no temporary register
584  unsigned SrcReg = MI.getOperand(1).getReg();
585  bool SrcIsKill = MI.getOperand(1).isKill();
586  OpLo = AVR::LDRdPtrPi;
587  OpHi = AVR::LDRdPtr;
588  TRI->splitReg(DstReg, DstLoReg, DstHiReg);
589 
590  // Use a temporary register if src and dst registers are the same.
591  if (DstReg == SrcReg)
592  TmpReg = scavengeGPR8(MI);
593 
594  unsigned CurDstLoReg = (DstReg == SrcReg) ? TmpReg : DstLoReg;
595  unsigned CurDstHiReg = (DstReg == SrcReg) ? TmpReg : DstHiReg;
596 
597  // Load low byte.
598  auto MIBLO = buildMI(MBB, MBBI, OpLo)
599  .addReg(CurDstLoReg, RegState::Define)
600  .addReg(SrcReg, RegState::Define)
601  .addReg(SrcReg);
602 
603  // Push low byte onto stack if necessary.
604  if (TmpReg)
605  buildMI(MBB, MBBI, AVR::PUSHRr).addReg(TmpReg);
606 
607  // Load high byte.
608  auto MIBHI = buildMI(MBB, MBBI, OpHi)
609  .addReg(CurDstHiReg, RegState::Define)
610  .addReg(SrcReg, getKillRegState(SrcIsKill));
611 
612  if (TmpReg) {
613  // Move the high byte into the final destination.
614  buildMI(MBB, MBBI, AVR::MOVRdRr).addReg(DstHiReg).addReg(TmpReg);
615 
616  // Move the low byte from the scratch space into the final destination.
617  buildMI(MBB, MBBI, AVR::POPRd).addReg(DstLoReg);
618  }
619 
620  MIBLO->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
621  MIBHI->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
622 
623  MI.eraseFromParent();
624  return true;
625 }
626 
627 template <>
628 bool AVRExpandPseudo::expand<AVR::LDWRdPtrPi>(Block &MBB, BlockIt MBBI) {
629  MachineInstr &MI = *MBBI;
630  unsigned OpLo, OpHi, DstLoReg, DstHiReg;
631  unsigned DstReg = MI.getOperand(0).getReg();
632  unsigned SrcReg = MI.getOperand(1).getReg();
633  bool DstIsDead = MI.getOperand(0).isDead();
634  bool SrcIsDead = MI.getOperand(1).isKill();
635  OpLo = AVR::LDRdPtrPi;
636  OpHi = AVR::LDRdPtrPi;
637  TRI->splitReg(DstReg, DstLoReg, DstHiReg);
638 
639  assert(DstReg != SrcReg && "SrcReg and DstReg cannot be the same");
640 
641  auto MIBLO = buildMI(MBB, MBBI, OpLo)
642  .addReg(DstLoReg, RegState::Define | getDeadRegState(DstIsDead))
643  .addReg(SrcReg, RegState::Define)
644  .addReg(SrcReg, RegState::Kill);
645 
646  auto MIBHI = buildMI(MBB, MBBI, OpHi)
647  .addReg(DstHiReg, RegState::Define | getDeadRegState(DstIsDead))
648  .addReg(SrcReg, RegState::Define | getDeadRegState(SrcIsDead))
649  .addReg(SrcReg, RegState::Kill);
650 
651  MIBLO->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
652  MIBHI->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
653 
654  MI.eraseFromParent();
655  return true;
656 }
657 
658 template <>
659 bool AVRExpandPseudo::expand<AVR::LDWRdPtrPd>(Block &MBB, BlockIt MBBI) {
660  MachineInstr &MI = *MBBI;
661  unsigned OpLo, OpHi, DstLoReg, DstHiReg;
662  unsigned DstReg = MI.getOperand(0).getReg();
663  unsigned SrcReg = MI.getOperand(1).getReg();
664  bool DstIsDead = MI.getOperand(0).isDead();
665  bool SrcIsDead = MI.getOperand(1).isKill();
666  OpLo = AVR::LDRdPtrPd;
667  OpHi = AVR::LDRdPtrPd;
668  TRI->splitReg(DstReg, DstLoReg, DstHiReg);
669 
670  assert(DstReg != SrcReg && "SrcReg and DstReg cannot be the same");
671 
672  auto MIBHI = buildMI(MBB, MBBI, OpHi)
673  .addReg(DstHiReg, RegState::Define | getDeadRegState(DstIsDead))
674  .addReg(SrcReg, RegState::Define)
675  .addReg(SrcReg, RegState::Kill);
676 
677  auto MIBLO = buildMI(MBB, MBBI, OpLo)
678  .addReg(DstLoReg, RegState::Define | getDeadRegState(DstIsDead))
679  .addReg(SrcReg, RegState::Define | getDeadRegState(SrcIsDead))
680  .addReg(SrcReg, RegState::Kill);
681 
682  MIBLO->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
683  MIBHI->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
684 
685  MI.eraseFromParent();
686  return true;
687 }
688 
689 template <>
690 bool AVRExpandPseudo::expand<AVR::LDDWRdPtrQ>(Block &MBB, BlockIt MBBI) {
691  MachineInstr &MI = *MBBI;
692  unsigned OpLo, OpHi, DstLoReg, DstHiReg;
693  unsigned DstReg = MI.getOperand(0).getReg();
694  unsigned TmpReg = 0; // 0 for no temporary register
695  unsigned SrcReg = MI.getOperand(1).getReg();
696  unsigned Imm = MI.getOperand(2).getImm();
697  bool SrcIsKill = MI.getOperand(1).isKill();
698  OpLo = AVR::LDDRdPtrQ;
699  OpHi = AVR::LDDRdPtrQ;
700  TRI->splitReg(DstReg, DstLoReg, DstHiReg);
701 
702  // Since we add 1 to the Imm value for the high byte below, and 63 is the highest Imm value
703  // allowed for the instruction, 62 is the limit here.
704  assert(Imm <= 62 && "Offset is out of range");
705 
706  // Use a temporary register if src and dst registers are the same.
707  if (DstReg == SrcReg)
708  TmpReg = scavengeGPR8(MI);
709 
710  unsigned CurDstLoReg = (DstReg == SrcReg) ? TmpReg : DstLoReg;
711  unsigned CurDstHiReg = (DstReg == SrcReg) ? TmpReg : DstHiReg;
712 
713  // Load low byte.
714  auto MIBLO = buildMI(MBB, MBBI, OpLo)
715  .addReg(CurDstLoReg, RegState::Define)
716  .addReg(SrcReg)
717  .addImm(Imm);
718 
719  // Push low byte onto stack if necessary.
720  if (TmpReg)
721  buildMI(MBB, MBBI, AVR::PUSHRr).addReg(TmpReg);
722 
723  // Load high byte.
724  auto MIBHI = buildMI(MBB, MBBI, OpHi)
725  .addReg(CurDstHiReg, RegState::Define)
726  .addReg(SrcReg, getKillRegState(SrcIsKill))
727  .addImm(Imm + 1);
728 
729  if (TmpReg) {
730  // Move the high byte into the final destination.
731  buildMI(MBB, MBBI, AVR::MOVRdRr).addReg(DstHiReg).addReg(TmpReg);
732 
733  // Move the low byte from the scratch space into the final destination.
734  buildMI(MBB, MBBI, AVR::POPRd).addReg(DstLoReg);
735  }
736 
737  MIBLO->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
738  MIBHI->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
739 
740  MI.eraseFromParent();
741  return true;
742 }
743 
744 template <>
745 bool AVRExpandPseudo::expand<AVR::LPMWRdZ>(Block &MBB, BlockIt MBBI) {
746  MachineInstr &MI = *MBBI;
747  unsigned OpLo, OpHi, DstLoReg, DstHiReg;
748  unsigned DstReg = MI.getOperand(0).getReg();
749  unsigned TmpReg = 0; // 0 for no temporary register
750  unsigned SrcReg = MI.getOperand(1).getReg();
751  bool SrcIsKill = MI.getOperand(1).isKill();
752  OpLo = AVR::LPMRdZPi;
753  OpHi = AVR::LPMRdZ;
754  TRI->splitReg(DstReg, DstLoReg, DstHiReg);
755 
756  // Use a temporary register if src and dst registers are the same.
757  if (DstReg == SrcReg)
758  TmpReg = scavengeGPR8(MI);
759 
760  unsigned CurDstLoReg = (DstReg == SrcReg) ? TmpReg : DstLoReg;
761  unsigned CurDstHiReg = (DstReg == SrcReg) ? TmpReg : DstHiReg;
762 
763  // Load low byte.
764  auto MIBLO = buildMI(MBB, MBBI, OpLo)
765  .addReg(CurDstLoReg, RegState::Define)
766  .addReg(SrcReg);
767 
768  // Push low byte onto stack if necessary.
769  if (TmpReg)
770  buildMI(MBB, MBBI, AVR::PUSHRr).addReg(TmpReg);
771 
772  // Load high byte.
773  auto MIBHI = buildMI(MBB, MBBI, OpHi)
774  .addReg(CurDstHiReg, RegState::Define)
775  .addReg(SrcReg, getKillRegState(SrcIsKill));
776 
777  if (TmpReg) {
778  // Move the high byte into the final destination.
779  buildMI(MBB, MBBI, AVR::MOVRdRr).addReg(DstHiReg).addReg(TmpReg);
780 
781  // Move the low byte from the scratch space into the final destination.
782  buildMI(MBB, MBBI, AVR::POPRd).addReg(DstLoReg);
783  }
784 
785  MIBLO->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
786  MIBHI->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
787 
788  MI.eraseFromParent();
789  return true;
790 }
791 
792 template <>
793 bool AVRExpandPseudo::expand<AVR::LPMWRdZPi>(Block &MBB, BlockIt MBBI) {
794  llvm_unreachable("wide LPMPi is unimplemented");
795 }
796 
797 template<typename Func>
798 bool AVRExpandPseudo::expandAtomic(Block &MBB, BlockIt MBBI, Func f) {
799  // Remove the pseudo instruction.
800  MachineInstr &MI = *MBBI;
801 
802  // Store the SREG.
803  buildMI(MBB, MBBI, AVR::INRdA)
804  .addReg(SCRATCH_REGISTER, RegState::Define)
805  .addImm(SREG_ADDR);
806 
807  // Disable exceptions.
808  buildMI(MBB, MBBI, AVR::BCLRs).addImm(7); // CLI
809 
810  f(MI);
811 
812  // Restore the status reg.
813  buildMI(MBB, MBBI, AVR::OUTARr)
814  .addImm(SREG_ADDR)
815  .addReg(SCRATCH_REGISTER);
816 
817  MI.eraseFromParent();
818  return true;
819 }
820 
821 template<typename Func>
822 bool AVRExpandPseudo::expandAtomicBinaryOp(unsigned Opcode,
823  Block &MBB,
824  BlockIt MBBI,
825  Func f) {
826  return expandAtomic(MBB, MBBI, [&](MachineInstr &MI) {
827  auto Op1 = MI.getOperand(0);
828  auto Op2 = MI.getOperand(1);
829 
830  MachineInstr &NewInst =
831  *buildMI(MBB, MBBI, Opcode).add(Op1).add(Op2).getInstr();
832  f(NewInst);
833  });
834 }
835 
836 bool AVRExpandPseudo::expandAtomicBinaryOp(unsigned Opcode,
837  Block &MBB,
838  BlockIt MBBI) {
839  return expandAtomicBinaryOp(Opcode, MBB, MBBI, [](MachineInstr &MI) {});
840 }
841 
842 bool AVRExpandPseudo::expandAtomicArithmeticOp(unsigned Width,
843  unsigned ArithOpcode,
844  Block &MBB,
845  BlockIt MBBI) {
846  return expandAtomic(MBB, MBBI, [&](MachineInstr &MI) {
847  auto Op1 = MI.getOperand(0);
848  auto Op2 = MI.getOperand(1);
849 
850  unsigned LoadOpcode = (Width == 8) ? AVR::LDRdPtr : AVR::LDWRdPtr;
851  unsigned StoreOpcode = (Width == 8) ? AVR::STPtrRr : AVR::STWPtrRr;
852 
853  // Create the load
854  buildMI(MBB, MBBI, LoadOpcode).add(Op1).add(Op2);
855 
856  // Create the arithmetic op
857  buildMI(MBB, MBBI, ArithOpcode).add(Op1).add(Op1).add(Op2);
858 
859  // Create the store
860  buildMI(MBB, MBBI, StoreOpcode).add(Op2).add(Op1);
861  });
862 }
863 
864 unsigned AVRExpandPseudo::scavengeGPR8(MachineInstr &MI) {
865  MachineBasicBlock &MBB = *MI.getParent();
866  RegScavenger RS;
867 
868  RS.enterBasicBlock(MBB);
869  RS.forward(MI);
870 
871  BitVector Candidates =
872  TRI->getAllocatableSet
873  (*MBB.getParent(), &AVR::GPR8RegClass);
874 
875  // Exclude all the registers being used by the instruction.
876  for (MachineOperand &MO : MI.operands()) {
877  if (MO.isReg() && MO.getReg() != 0 && !MO.isDef() &&
878  !TargetRegisterInfo::isVirtualRegister(MO.getReg()))
879  Candidates.reset(MO.getReg());
880  }
881 
882  BitVector Available = RS.getRegsAvailable(&AVR::GPR8RegClass);
883  Available &= Candidates;
884 
885  signed Reg = Available.find_first();
886  assert(Reg != -1 && "ran out of registers");
887  return Reg;
888 }
889 
890 template<>
891 bool AVRExpandPseudo::expand<AVR::AtomicLoad8>(Block &MBB, BlockIt MBBI) {
892  return expandAtomicBinaryOp(AVR::LDRdPtr, MBB, MBBI);
893 }
894 
895 template<>
896 bool AVRExpandPseudo::expand<AVR::AtomicLoad16>(Block &MBB, BlockIt MBBI) {
897  return expandAtomicBinaryOp(AVR::LDWRdPtr, MBB, MBBI);
898 }
899 
900 template<>
901 bool AVRExpandPseudo::expand<AVR::AtomicStore8>(Block &MBB, BlockIt MBBI) {
902  return expandAtomicBinaryOp(AVR::STPtrRr, MBB, MBBI);
903 }
904 
905 template<>
906 bool AVRExpandPseudo::expand<AVR::AtomicStore16>(Block &MBB, BlockIt MBBI) {
907  return expandAtomicBinaryOp(AVR::STWPtrRr, MBB, MBBI);
908 }
909 
910 template<>
911 bool AVRExpandPseudo::expand<AVR::AtomicLoadAdd8>(Block &MBB, BlockIt MBBI) {
912  return expandAtomicArithmeticOp(8, AVR::ADDRdRr, MBB, MBBI);
913 }
914 
915 template<>
916 bool AVRExpandPseudo::expand<AVR::AtomicLoadAdd16>(Block &MBB, BlockIt MBBI) {
917  return expandAtomicArithmeticOp(16, AVR::ADDWRdRr, MBB, MBBI);
918 }
919 
920 template<>
921 bool AVRExpandPseudo::expand<AVR::AtomicLoadSub8>(Block &MBB, BlockIt MBBI) {
922  return expandAtomicArithmeticOp(8, AVR::SUBRdRr, MBB, MBBI);
923 }
924 
925 template<>
926 bool AVRExpandPseudo::expand<AVR::AtomicLoadSub16>(Block &MBB, BlockIt MBBI) {
927  return expandAtomicArithmeticOp(16, AVR::SUBWRdRr, MBB, MBBI);
928 }
929 
930 template<>
931 bool AVRExpandPseudo::expand<AVR::AtomicLoadAnd8>(Block &MBB, BlockIt MBBI) {
932  return expandAtomicArithmeticOp(8, AVR::ANDRdRr, MBB, MBBI);
933 }
934 
935 template<>
936 bool AVRExpandPseudo::expand<AVR::AtomicLoadAnd16>(Block &MBB, BlockIt MBBI) {
937  return expandAtomicArithmeticOp(16, AVR::ANDWRdRr, MBB, MBBI);
938 }
939 
940 template<>
941 bool AVRExpandPseudo::expand<AVR::AtomicLoadOr8>(Block &MBB, BlockIt MBBI) {
942  return expandAtomicArithmeticOp(8, AVR::ORRdRr, MBB, MBBI);
943 }
944 
945 template<>
946 bool AVRExpandPseudo::expand<AVR::AtomicLoadOr16>(Block &MBB, BlockIt MBBI) {
947  return expandAtomicArithmeticOp(16, AVR::ORWRdRr, MBB, MBBI);
948 }
949 
950 template<>
951 bool AVRExpandPseudo::expand<AVR::AtomicLoadXor8>(Block &MBB, BlockIt MBBI) {
952  return expandAtomicArithmeticOp(8, AVR::EORRdRr, MBB, MBBI);
953 }
954 
955 template<>
956 bool AVRExpandPseudo::expand<AVR::AtomicLoadXor16>(Block &MBB, BlockIt MBBI) {
957  return expandAtomicArithmeticOp(16, AVR::EORWRdRr, MBB, MBBI);
958 }
959 
960 template<>
961 bool AVRExpandPseudo::expand<AVR::AtomicFence>(Block &MBB, BlockIt MBBI) {
962  // On AVR, there is only one core and so atomic fences do nothing.
963  MBBI->eraseFromParent();
964  return true;
965 }
966 
967 template <>
968 bool AVRExpandPseudo::expand<AVR::STSWKRr>(Block &MBB, BlockIt MBBI) {
969  MachineInstr &MI = *MBBI;
970  unsigned OpLo, OpHi, SrcLoReg, SrcHiReg;
971  unsigned SrcReg = MI.getOperand(1).getReg();
972  bool SrcIsKill = MI.getOperand(1).isKill();
973  OpLo = AVR::STSKRr;
974  OpHi = AVR::STSKRr;
975  TRI->splitReg(SrcReg, SrcLoReg, SrcHiReg);
976 
977  // Write the high byte first in case this address belongs to a special
978  // I/O address with a special temporary register.
979  auto MIBHI = buildMI(MBB, MBBI, OpHi);
980  auto MIBLO = buildMI(MBB, MBBI, OpLo);
981 
982  switch (MI.getOperand(0).getType()) {
983  case MachineOperand::MO_GlobalAddress: {
984  const GlobalValue *GV = MI.getOperand(0).getGlobal();
985  int64_t Offs = MI.getOperand(0).getOffset();
986  unsigned TF = MI.getOperand(0).getTargetFlags();
987 
988  MIBLO.addGlobalAddress(GV, Offs, TF);
989  MIBHI.addGlobalAddress(GV, Offs + 1, TF);
990  break;
991  }
992  case MachineOperand::MO_Immediate: {
993  unsigned Imm = MI.getOperand(0).getImm();
994 
995  MIBLO.addImm(Imm);
996  MIBHI.addImm(Imm + 1);
997  break;
998  }
999  default:
1000  llvm_unreachable("Unknown operand type!");
1001  }
1002 
1003  MIBLO.addReg(SrcLoReg, getKillRegState(SrcIsKill));
1004  MIBHI.addReg(SrcHiReg, getKillRegState(SrcIsKill));
1005 
1006  MIBLO->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
1007  MIBHI->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
1008 
1009  MI.eraseFromParent();
1010  return true;
1011 }
1012 
1013 template <>
1014 bool AVRExpandPseudo::expand<AVR::STWPtrRr>(Block &MBB, BlockIt MBBI) {
1015  MachineInstr &MI = *MBBI;
1016  unsigned OpLo, OpHi, SrcLoReg, SrcHiReg;
1017  unsigned DstReg = MI.getOperand(0).getReg();
1018  unsigned SrcReg = MI.getOperand(1).getReg();
1019  bool SrcIsKill = MI.getOperand(1).isKill();
1020  OpLo = AVR::STPtrRr;
1021  OpHi = AVR::STDPtrQRr;
1022  TRI->splitReg(SrcReg, SrcLoReg, SrcHiReg);
1023 
1024  //:TODO: need to reverse this order like inw and stsw?
1025  auto MIBLO = buildMI(MBB, MBBI, OpLo)
1026  .addReg(DstReg)
1027  .addReg(SrcLoReg, getKillRegState(SrcIsKill));
1028 
1029  auto MIBHI = buildMI(MBB, MBBI, OpHi)
1030  .addReg(DstReg)
1031  .addImm(1)
1032  .addReg(SrcHiReg, getKillRegState(SrcIsKill));
1033 
1034  MIBLO->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
1035  MIBHI->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
1036 
1037  MI.eraseFromParent();
1038  return true;
1039 }
1040 
1041 template <>
1042 bool AVRExpandPseudo::expand<AVR::STWPtrPiRr>(Block &MBB, BlockIt MBBI) {
1043  MachineInstr &MI = *MBBI;
1044  unsigned OpLo, OpHi, SrcLoReg, SrcHiReg;
1045  unsigned DstReg = MI.getOperand(0).getReg();
1046  unsigned SrcReg = MI.getOperand(2).getReg();
1047  unsigned Imm = MI.getOperand(3).getImm();
1048  bool DstIsDead = MI.getOperand(0).isDead();
1049  bool SrcIsKill = MI.getOperand(2).isKill();
1050  OpLo = AVR::STPtrPiRr;
1051  OpHi = AVR::STPtrPiRr;
1052  TRI->splitReg(SrcReg, SrcLoReg, SrcHiReg);
1053 
1054  assert(DstReg != SrcReg && "SrcReg and DstReg cannot be the same");
1055 
1056  auto MIBLO = buildMI(MBB, MBBI, OpLo)
1057  .addReg(DstReg, RegState::Define)
1058  .addReg(DstReg, RegState::Kill)
1059  .addReg(SrcLoReg, getKillRegState(SrcIsKill))
1060  .addImm(Imm);
1061 
1062  auto MIBHI = buildMI(MBB, MBBI, OpHi)
1063  .addReg(DstReg, RegState::Define | getDeadRegState(DstIsDead))
1064  .addReg(DstReg, RegState::Kill)
1065  .addReg(SrcHiReg, getKillRegState(SrcIsKill))
1066  .addImm(Imm);
1067 
1068  MIBLO->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
1069  MIBHI->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
1070 
1071  MI.eraseFromParent();
1072  return true;
1073 }
1074 
1075 template <>
1076 bool AVRExpandPseudo::expand<AVR::STWPtrPdRr>(Block &MBB, BlockIt MBBI) {
1077  MachineInstr &MI = *MBBI;
1078  unsigned OpLo, OpHi, SrcLoReg, SrcHiReg;
1079  unsigned DstReg = MI.getOperand(0).getReg();
1080  unsigned SrcReg = MI.getOperand(2).getReg();
1081  unsigned Imm = MI.getOperand(3).getImm();
1082  bool DstIsDead = MI.getOperand(0).isDead();
1083  bool SrcIsKill = MI.getOperand(2).isKill();
1084  OpLo = AVR::STPtrPdRr;
1085  OpHi = AVR::STPtrPdRr;
1086  TRI->splitReg(SrcReg, SrcLoReg, SrcHiReg);
1087 
1088  assert(DstReg != SrcReg && "SrcReg and DstReg cannot be the same");
1089 
1090  auto MIBHI = buildMI(MBB, MBBI, OpHi)
1091  .addReg(DstReg, RegState::Define)
1092  .addReg(DstReg, RegState::Kill)
1093  .addReg(SrcHiReg, getKillRegState(SrcIsKill))
1094  .addImm(Imm);
1095 
1096  auto MIBLO = buildMI(MBB, MBBI, OpLo)
1097  .addReg(DstReg, RegState::Define | getDeadRegState(DstIsDead))
1098  .addReg(DstReg, RegState::Kill)
1099  .addReg(SrcLoReg, getKillRegState(SrcIsKill))
1100  .addImm(Imm);
1101 
1102  MIBLO->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
1103  MIBHI->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
1104 
1105  MI.eraseFromParent();
1106  return true;
1107 }
1108 
1109 template <>
1110 bool AVRExpandPseudo::expand<AVR::STDWPtrQRr>(Block &MBB, BlockIt MBBI) {
1111  MachineInstr &MI = *MBBI;
1112  unsigned OpLo, OpHi, SrcLoReg, SrcHiReg;
1113  unsigned DstReg = MI.getOperand(0).getReg();
1114  unsigned SrcReg = MI.getOperand(2).getReg();
1115  unsigned Imm = MI.getOperand(1).getImm();
1116  bool DstIsKill = MI.getOperand(0).isKill();
1117  bool SrcIsKill = MI.getOperand(2).isKill();
1118  OpLo = AVR::STDPtrQRr;
1119  OpHi = AVR::STDPtrQRr;
1120  TRI->splitReg(SrcReg, SrcLoReg, SrcHiReg);
1121 
1122  // Since we add 1 to the Imm value for the high byte below, and 63 is the highest Imm value
1123  // allowed for the instruction, 62 is the limit here.
1124  assert(Imm <= 62 && "Offset is out of range");
1125 
1126  auto MIBLO = buildMI(MBB, MBBI, OpLo)
1127  .addReg(DstReg)
1128  .addImm(Imm)
1129  .addReg(SrcLoReg, getKillRegState(SrcIsKill));
1130 
1131  auto MIBHI = buildMI(MBB, MBBI, OpHi)
1132  .addReg(DstReg, getKillRegState(DstIsKill))
1133  .addImm(Imm + 1)
1134  .addReg(SrcHiReg, getKillRegState(SrcIsKill));
1135 
1136  MIBLO->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
1137  MIBHI->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
1138 
1139  MI.eraseFromParent();
1140  return true;
1141 }
1142 
1143 template <>
1144 bool AVRExpandPseudo::expand<AVR::INWRdA>(Block &MBB, BlockIt MBBI) {
1145  MachineInstr &MI = *MBBI;
1146  unsigned OpLo, OpHi, DstLoReg, DstHiReg;
1147  unsigned Imm = MI.getOperand(1).getImm();
1148  unsigned DstReg = MI.getOperand(0).getReg();
1149  bool DstIsDead = MI.getOperand(0).isDead();
1150  OpLo = AVR::INRdA;
1151  OpHi = AVR::INRdA;
1152  TRI->splitReg(DstReg, DstLoReg, DstHiReg);
1153 
1154  // Since we add 1 to the Imm value for the high byte below, and 63 is the highest Imm value
1155  // allowed for the instruction, 62 is the limit here.
1156  assert(Imm <= 62 && "Address is out of range");
1157 
1158  auto MIBLO = buildMI(MBB, MBBI, OpLo)
1159  .addReg(DstLoReg, RegState::Define | getDeadRegState(DstIsDead))
1160  .addImm(Imm);
1161 
1162  auto MIBHI = buildMI(MBB, MBBI, OpHi)
1163  .addReg(DstHiReg, RegState::Define | getDeadRegState(DstIsDead))
1164  .addImm(Imm + 1);
1165 
1166  MIBLO->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
1167  MIBHI->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
1168 
1169  MI.eraseFromParent();
1170  return true;
1171 }
1172 
1173 template <>
1174 bool AVRExpandPseudo::expand<AVR::OUTWARr>(Block &MBB, BlockIt MBBI) {
1175  MachineInstr &MI = *MBBI;
1176  unsigned OpLo, OpHi, SrcLoReg, SrcHiReg;
1177  unsigned Imm = MI.getOperand(0).getImm();
1178  unsigned SrcReg = MI.getOperand(1).getReg();
1179  bool SrcIsKill = MI.getOperand(1).isKill();
1180  OpLo = AVR::OUTARr;
1181  OpHi = AVR::OUTARr;
1182  TRI->splitReg(SrcReg, SrcLoReg, SrcHiReg);
1183 
1184  // Since we add 1 to the Imm value for the high byte below, and 63 is the highest Imm value
1185  // allowed for the instruction, 62 is the limit here.
1186  assert(Imm <= 62 && "Address is out of range");
1187 
1188  // 16 bit I/O writes need the high byte first
1189  auto MIBHI = buildMI(MBB, MBBI, OpHi)
1190  .addImm(Imm + 1)
1191  .addReg(SrcHiReg, getKillRegState(SrcIsKill));
1192 
1193  auto MIBLO = buildMI(MBB, MBBI, OpLo)
1194  .addImm(Imm)
1195  .addReg(SrcLoReg, getKillRegState(SrcIsKill));
1196 
1197  MIBLO->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
1198  MIBHI->setMemRefs(MI.memoperands_begin(), MI.memoperands_end());
1199 
1200  MI.eraseFromParent();
1201  return true;
1202 }
1203 
1204 template <>
1205 bool AVRExpandPseudo::expand<AVR::PUSHWRr>(Block &MBB, BlockIt MBBI) {
1206  MachineInstr &MI = *MBBI;
1207  unsigned OpLo, OpHi, SrcLoReg, SrcHiReg;
1208  unsigned SrcReg = MI.getOperand(0).getReg();
1209  bool SrcIsKill = MI.getOperand(0).isKill();
1210  unsigned Flags = MI.getFlags();
1211  OpLo = AVR::PUSHRr;
1212  OpHi = AVR::PUSHRr;
1213  TRI->splitReg(SrcReg, SrcLoReg, SrcHiReg);
1214 
1215  // Low part
1216  buildMI(MBB, MBBI, OpLo)
1217  .addReg(SrcLoReg, getKillRegState(SrcIsKill))
1218  .setMIFlags(Flags);
1219 
1220  // High part
1221  buildMI(MBB, MBBI, OpHi)
1222  .addReg(SrcHiReg, getKillRegState(SrcIsKill))
1223  .setMIFlags(Flags);
1224 
1225  MI.eraseFromParent();
1226  return true;
1227 }
1228 
1229 template <>
1230 bool AVRExpandPseudo::expand<AVR::POPWRd>(Block &MBB, BlockIt MBBI) {
1231  MachineInstr &MI = *MBBI;
1232  unsigned OpLo, OpHi, DstLoReg, DstHiReg;
1233  unsigned DstReg = MI.getOperand(0).getReg();
1234  unsigned Flags = MI.getFlags();
1235  OpLo = AVR::POPRd;
1236  OpHi = AVR::POPRd;
1237  TRI->splitReg(DstReg, DstLoReg, DstHiReg);
1238 
1239  buildMI(MBB, MBBI, OpHi, DstHiReg).setMIFlags(Flags); // High
1240  buildMI(MBB, MBBI, OpLo, DstLoReg).setMIFlags(Flags); // Low
1241 
1242  MI.eraseFromParent();
1243  return true;
1244 }
1245 
1246 template <>
1247 bool AVRExpandPseudo::expand<AVR::LSLWRd>(Block &MBB, BlockIt MBBI) {
1248  MachineInstr &MI = *MBBI;
1249  unsigned OpLo, OpHi, DstLoReg, DstHiReg;
1250  unsigned DstReg = MI.getOperand(0).getReg();
1251  bool DstIsDead = MI.getOperand(0).isDead();
1252  bool DstIsKill = MI.getOperand(1).isKill();
1253  bool ImpIsDead = MI.getOperand(2).isDead();
1254  OpLo = AVR::LSLRd;
1255  OpHi = AVR::ROLRd;
1256  TRI->splitReg(DstReg, DstLoReg, DstHiReg);
1257 
1258  // Low part
1259  buildMI(MBB, MBBI, OpLo)
1260  .addReg(DstLoReg, RegState::Define | getDeadRegState(DstIsDead))
1261  .addReg(DstLoReg, getKillRegState(DstIsKill));
1262 
1263  auto MIBHI = buildMI(MBB, MBBI, OpHi)
1264  .addReg(DstHiReg, RegState::Define | getDeadRegState(DstIsDead))
1265  .addReg(DstHiReg, getKillRegState(DstIsKill));
1266 
1267  if (ImpIsDead)
1268  MIBHI->getOperand(2).setIsDead();
1269 
1270  // SREG is always implicitly killed
1271  MIBHI->getOperand(3).setIsKill();
1272 
1273  MI.eraseFromParent();
1274  return true;
1275 }
1276 
1277 template <>
1278 bool AVRExpandPseudo::expand<AVR::LSRWRd>(Block &MBB, BlockIt MBBI) {
1279  MachineInstr &MI = *MBBI;
1280  unsigned OpLo, OpHi, DstLoReg, DstHiReg;
1281  unsigned DstReg = MI.getOperand(0).getReg();
1282  bool DstIsDead = MI.getOperand(0).isDead();
1283  bool DstIsKill = MI.getOperand(1).isKill();
1284  bool ImpIsDead = MI.getOperand(2).isDead();
1285  OpLo = AVR::RORRd;
1286  OpHi = AVR::LSRRd;
1287  TRI->splitReg(DstReg, DstLoReg, DstHiReg);
1288 
1289  // High part
1290  buildMI(MBB, MBBI, OpHi)
1291  .addReg(DstHiReg, RegState::Define | getDeadRegState(DstIsDead))
1292  .addReg(DstHiReg, getKillRegState(DstIsKill));
1293 
1294  auto MIBLO = buildMI(MBB, MBBI, OpLo)
1295  .addReg(DstLoReg, RegState::Define | getDeadRegState(DstIsDead))
1296  .addReg(DstLoReg, getKillRegState(DstIsKill));
1297 
1298  if (ImpIsDead)
1299  MIBLO->getOperand(2).setIsDead();
1300 
1301  // SREG is always implicitly killed
1302  MIBLO->getOperand(3).setIsKill();
1303 
1304  MI.eraseFromParent();
1305  return true;
1306 }
1307 
1308 template <>
1309 bool AVRExpandPseudo::expand<AVR::RORWRd>(Block &MBB, BlockIt MBBI) {
1310  llvm_unreachable("RORW unimplemented");
1311  return false;
1312 }
1313 
1314 template <>
1315 bool AVRExpandPseudo::expand<AVR::ROLWRd>(Block &MBB, BlockIt MBBI) {
1316  llvm_unreachable("ROLW unimplemented");
1317  return false;
1318 }
1319 
1320 template <>
1321 bool AVRExpandPseudo::expand<AVR::ASRWRd>(Block &MBB, BlockIt MBBI) {
1322  MachineInstr &MI = *MBBI;
1323  unsigned OpLo, OpHi, DstLoReg, DstHiReg;
1324  unsigned DstReg = MI.getOperand(0).getReg();
1325  bool DstIsDead = MI.getOperand(0).isDead();
1326  bool DstIsKill = MI.getOperand(1).isKill();
1327  bool ImpIsDead = MI.getOperand(2).isDead();
1328  OpLo = AVR::RORRd;
1329  OpHi = AVR::ASRRd;
1330  TRI->splitReg(DstReg, DstLoReg, DstHiReg);
1331 
1332  // High part
1333  buildMI(MBB, MBBI, OpHi)
1334  .addReg(DstHiReg, RegState::Define | getDeadRegState(DstIsDead))
1335  .addReg(DstHiReg, getKillRegState(DstIsKill));
1336 
1337  auto MIBLO = buildMI(MBB, MBBI, OpLo)
1338  .addReg(DstLoReg, RegState::Define | getDeadRegState(DstIsDead))
1339  .addReg(DstLoReg, getKillRegState(DstIsKill));
1340 
1341  if (ImpIsDead)
1342  MIBLO->getOperand(2).setIsDead();
1343 
1344  // SREG is always implicitly killed
1345  MIBLO->getOperand(3).setIsKill();
1346 
1347  MI.eraseFromParent();
1348  return true;
1349 }
1350 
1351 template <> bool AVRExpandPseudo::expand<AVR::SEXT>(Block &MBB, BlockIt MBBI) {
1352  MachineInstr &MI = *MBBI;
1353  unsigned DstLoReg, DstHiReg;
1354  // sext R17:R16, R17
1355  // mov r16, r17
1356  // lsl r17
1357  // sbc r17, r17
1358  // sext R17:R16, R13
1359  // mov r16, r13
1360  // mov r17, r13
1361  // lsl r17
1362  // sbc r17, r17
1363  // sext R17:R16, R16
1364  // mov r17, r16
1365  // lsl r17
1366  // sbc r17, r17
1367  unsigned DstReg = MI.getOperand(0).getReg();
1368  unsigned SrcReg = MI.getOperand(1).getReg();
1369  bool DstIsDead = MI.getOperand(0).isDead();
1370  bool SrcIsKill = MI.getOperand(1).isKill();
1371  bool ImpIsDead = MI.getOperand(2).isDead();
1372  TRI->splitReg(DstReg, DstLoReg, DstHiReg);
1373 
1374  if (SrcReg != DstLoReg) {
1375  auto MOV = buildMI(MBB, MBBI, AVR::MOVRdRr)
1376  .addReg(DstLoReg, RegState::Define | getDeadRegState(DstIsDead))
1377  .addReg(SrcReg);
1378 
1379  if (SrcReg == DstHiReg) {
1380  MOV->getOperand(1).setIsKill();
1381  }
1382  }
1383 
1384  if (SrcReg != DstHiReg) {
1385  buildMI(MBB, MBBI, AVR::MOVRdRr)
1386  .addReg(DstHiReg, RegState::Define)
1387  .addReg(SrcReg, getKillRegState(SrcIsKill));
1388  }
1389 
1390  buildMI(MBB, MBBI, AVR::LSLRd)
1391  .addReg(DstHiReg, RegState::Define)
1392  .addReg(DstHiReg, RegState::Kill);
1393 
1394  auto SBC = buildMI(MBB, MBBI, AVR::SBCRdRr)
1395  .addReg(DstHiReg, RegState::Define | getDeadRegState(DstIsDead))
1396  .addReg(DstHiReg, RegState::Kill)
1397  .addReg(DstHiReg, RegState::Kill);
1398 
1399  if (ImpIsDead)
1400  SBC->getOperand(3).setIsDead();
1401 
1402  // SREG is always implicitly killed
1403  SBC->getOperand(4).setIsKill();
1404 
1405  MI.eraseFromParent();
1406  return true;
1407 }
1408 
1409 template <> bool AVRExpandPseudo::expand<AVR::ZEXT>(Block &MBB, BlockIt MBBI) {
1410  MachineInstr &MI = *MBBI;
1411  unsigned DstLoReg, DstHiReg;
1412  // zext R25:R24, R20
1413  // mov R24, R20
1414  // eor R25, R25
1415  // zext R25:R24, R24
1416  // eor R25, R25
1417  // zext R25:R24, R25
1418  // mov R24, R25
1419  // eor R25, R25
1420  unsigned DstReg = MI.getOperand(0).getReg();
1421  unsigned SrcReg = MI.getOperand(1).getReg();
1422  bool DstIsDead = MI.getOperand(0).isDead();
1423  bool SrcIsKill = MI.getOperand(1).isKill();
1424  bool ImpIsDead = MI.getOperand(2).isDead();
1425  TRI->splitReg(DstReg, DstLoReg, DstHiReg);
1426 
1427  if (SrcReg != DstLoReg) {
1428  buildMI(MBB, MBBI, AVR::MOVRdRr)
1429  .addReg(DstLoReg, RegState::Define | getDeadRegState(DstIsDead))
1430  .addReg(SrcReg, getKillRegState(SrcIsKill));
1431  }
1432 
1433  auto EOR = buildMI(MBB, MBBI, AVR::EORRdRr)
1434  .addReg(DstHiReg, RegState::Define | getDeadRegState(DstIsDead))
1435  .addReg(DstHiReg, RegState::Kill)
1436  .addReg(DstHiReg, RegState::Kill);
1437 
1438  if (ImpIsDead)
1439  EOR->getOperand(3).setIsDead();
1440 
1441  MI.eraseFromParent();
1442  return true;
1443 }
1444 
1445 template <>
1446 bool AVRExpandPseudo::expand<AVR::SPREAD>(Block &MBB, BlockIt MBBI) {
1447  MachineInstr &MI = *MBBI;
1448  unsigned OpLo, OpHi, DstLoReg, DstHiReg;
1449  unsigned DstReg = MI.getOperand(0).getReg();
1450  bool DstIsDead = MI.getOperand(0).isDead();
1451  unsigned Flags = MI.getFlags();
1452  OpLo = AVR::INRdA;
1453  OpHi = AVR::INRdA;
1454  TRI->splitReg(DstReg, DstLoReg, DstHiReg);
1455 
1456  // Low part
1457  buildMI(MBB, MBBI, OpLo)
1458  .addReg(DstLoReg, RegState::Define | getDeadRegState(DstIsDead))
1459  .addImm(0x3d)
1460  .setMIFlags(Flags);
1461 
1462  // High part
1463  buildMI(MBB, MBBI, OpHi)
1464  .addReg(DstHiReg, RegState::Define | getDeadRegState(DstIsDead))
1465  .addImm(0x3e)
1466  .setMIFlags(Flags);
1467 
1468  MI.eraseFromParent();
1469  return true;
1470 }
1471 
1472 template <>
1473 bool AVRExpandPseudo::expand<AVR::SPWRITE>(Block &MBB, BlockIt MBBI) {
1474  MachineInstr &MI = *MBBI;
1475  unsigned SrcLoReg, SrcHiReg;
1476  unsigned SrcReg = MI.getOperand(1).getReg();
1477  bool SrcIsKill = MI.getOperand(1).isKill();
1478  unsigned Flags = MI.getFlags();
1479  TRI->splitReg(SrcReg, SrcLoReg, SrcHiReg);
1480 
1481  buildMI(MBB, MBBI, AVR::INRdA)
1482  .addReg(AVR::R0, RegState::Define)
1483  .addImm(SREG_ADDR)
1484  .setMIFlags(Flags);
1485 
1486  buildMI(MBB, MBBI, AVR::BCLRs).addImm(0x07).setMIFlags(Flags);
1487 
1488  buildMI(MBB, MBBI, AVR::OUTARr)
1489  .addImm(0x3e)
1490  .addReg(SrcHiReg, getKillRegState(SrcIsKill))
1491  .setMIFlags(Flags);
1492 
1493  buildMI(MBB, MBBI, AVR::OUTARr)
1494  .addImm(SREG_ADDR)
1495  .addReg(AVR::R0, RegState::Kill)
1496  .setMIFlags(Flags);
1497 
1498  buildMI(MBB, MBBI, AVR::OUTARr)
1499  .addImm(0x3d)
1500  .addReg(SrcLoReg, getKillRegState(SrcIsKill))
1501  .setMIFlags(Flags);
1502 
1503  MI.eraseFromParent();
1504  return true;
1505 }
1506 
1507 bool AVRExpandPseudo::expandMI(Block &MBB, BlockIt MBBI) {
1508  MachineInstr &MI = *MBBI;
1509  int Opcode = MBBI->getOpcode();
1510 
1511 #define EXPAND(Op) \
1512  case Op: \
1513  return expand<Op>(MBB, MI)
1514 
1515  switch (Opcode) {
1516  EXPAND(AVR::ADDWRdRr);
1517  EXPAND(AVR::ADCWRdRr);
1518  EXPAND(AVR::SUBWRdRr);
1519  EXPAND(AVR::SUBIWRdK);
1520  EXPAND(AVR::SBCWRdRr);
1521  EXPAND(AVR::SBCIWRdK);
1522  EXPAND(AVR::ANDWRdRr);
1523  EXPAND(AVR::ANDIWRdK);
1524  EXPAND(AVR::ORWRdRr);
1525  EXPAND(AVR::ORIWRdK);
1526  EXPAND(AVR::EORWRdRr);
1527  EXPAND(AVR::COMWRd);
1528  EXPAND(AVR::CPWRdRr);
1529  EXPAND(AVR::CPCWRdRr);
1530  EXPAND(AVR::LDIWRdK);
1531  EXPAND(AVR::LDSWRdK);
1532  EXPAND(AVR::LDWRdPtr);
1533  EXPAND(AVR::LDWRdPtrPi);
1534  EXPAND(AVR::LDWRdPtrPd);
1535  case AVR::LDDWRdYQ: //:FIXME: remove this once PR13375 gets fixed
1536  EXPAND(AVR::LDDWRdPtrQ);
1537  EXPAND(AVR::LPMWRdZ);
1538  EXPAND(AVR::LPMWRdZPi);
1539  EXPAND(AVR::AtomicLoad8);
1540  EXPAND(AVR::AtomicLoad16);
1541  EXPAND(AVR::AtomicStore8);
1542  EXPAND(AVR::AtomicStore16);
1543  EXPAND(AVR::AtomicLoadAdd8);
1544  EXPAND(AVR::AtomicLoadAdd16);
1545  EXPAND(AVR::AtomicLoadSub8);
1546  EXPAND(AVR::AtomicLoadSub16);
1547  EXPAND(AVR::AtomicLoadAnd8);
1548  EXPAND(AVR::AtomicLoadAnd16);
1549  EXPAND(AVR::AtomicLoadOr8);
1550  EXPAND(AVR::AtomicLoadOr16);
1551  EXPAND(AVR::AtomicLoadXor8);
1552  EXPAND(AVR::AtomicLoadXor16);
1553  EXPAND(AVR::AtomicFence);
1554  EXPAND(AVR::STSWKRr);
1555  EXPAND(AVR::STWPtrRr);
1556  EXPAND(AVR::STWPtrPiRr);
1557  EXPAND(AVR::STWPtrPdRr);
1558  EXPAND(AVR::STDWPtrQRr);
1559  EXPAND(AVR::INWRdA);
1560  EXPAND(AVR::OUTWARr);
1561  EXPAND(AVR::PUSHWRr);
1562  EXPAND(AVR::POPWRd);
1563  EXPAND(AVR::LSLWRd);
1564  EXPAND(AVR::LSRWRd);
1565  EXPAND(AVR::RORWRd);
1566  EXPAND(AVR::ROLWRd);
1567  EXPAND(AVR::ASRWRd);
1568  EXPAND(AVR::SEXT);
1569  EXPAND(AVR::ZEXT);
1570  EXPAND(AVR::SPREAD);
1571  EXPAND(AVR::SPWRITE);
1572  }
1573 #undef EXPAND
1574  return false;
1575 }
1576 
1577 } // end of anonymous namespace
1578 
1579 INITIALIZE_PASS(AVRExpandPseudo, "avr-expand-pseudo",
1580  AVR_EXPAND_PSEUDO_NAME, false, false)
1581 namespace llvm {
1582 
1583 FunctionPass *createAVRExpandPseudoPass() { return new AVRExpandPseudo(); }
1584 
1585 } // end of namespace llvm
llvm::MachineOperand::getTargetFlags
unsigned getTargetFlags() const
Definition: MachineOperand.h:199
llvm::AVRSubtarget::getInstrInfo
const AVRInstrInfo * getInstrInfo() const override
Definition: AVRSubtarget.h:42
llvm::PassRegistry::getPassRegistry
static PassRegistry * getPassRegistry()
getPassRegistry - Access the global registry object, which is automatically initialized at applicatio...
Definition: PassRegistry.cpp:32
llvm
Compute iterated dominance frontiers using a linear time algorithm.
Definition: AllocatorList.h:24
llvm::MachineFunction::getProperties
const MachineFunctionProperties & getProperties() const
Get the function properties.
Definition: MachineFunction.h:479
llvm::MachineOperand::getReg
unsigned getReg() const
getReg - Returns the register number.
Definition: MachineOperand.h:279
llvm::TargetRegisterInfo::isVirtualRegister
static bool isVirtualRegister(unsigned Reg)
Return true if the specified register number is in the virtual register namespace.
Definition: TargetRegisterInfo.h:295
llvm::MachineInstr::operands
iterator_range< mop_iterator > operands()
Definition: MachineInstr.h:317
llvm::AVRRegisterInfo
Utilities relating to AVR registers.
Definition: AVRRegisterInfo.h:25
llvm::BlockAddress
The address of a basic block.
Definition: Constants.h:813
llvm::MachineFunctionPass
MachineFunctionPass - This class adapts the FunctionPass interface to allow convenient creation of pa...
Definition: MachineFunctionPass.h:31
TII
const HexagonInstrInfo * TII
Definition: HexagonCopyToCombine.cpp:128
llvm::BitVector::find_first
int find_first() const
find_first - Returns the index of the first set bit, -1 if none of the bits are set.
Definition: BitVector.h:332
llvm::MachineInstr::eraseFromParent
void eraseFromParent()
Unlink &#39;this&#39; from the containing basic block and delete it.
Definition: MachineInstr.cpp:1171
llvm::X86Disassembler::Reg
Reg
All possible values of the reg field in the ModR/M byte.
Definition: X86DisassemblerDecoder.h:451
llvm::RegScavenger::forward
void forward()
Move the internal MBB iterator and update register states.
Definition: RegisterScavenging.cpp:176
llvm::RegScavenger::getRegsAvailable
BitVector getRegsAvailable(const TargetRegisterClass *RC)
Return all available registers in the register class in Mask.
Definition: RegisterScavenging.cpp:299
llvm::AVRII::MO_NEG
On a symbol operand, this represents it has to be negated.
Definition: AVRInstrInfo.h:59
llvm::getKillRegState
unsigned getKillRegState(bool B)
Definition: MachineInstrBuilder.h:431
llvm::TargetInstrInfo
TargetInstrInfo - Interface to description of machine instruction set.
Definition: TargetInstrInfo.h:65
llvm::getDeadRegState
unsigned getDeadRegState(bool B)
Definition: MachineInstrBuilder.h:434
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:286
llvm::MachineOperand::MO_GlobalAddress
Address of a global value.
Definition: MachineOperand.h:60
RegisterScavenging.h
This file declares the machine register scavenger class.
llvm::MachineFunction::getSubtarget
const TargetSubtargetInfo & getSubtarget() const
getSubtarget - Return the subtarget for which this machine code is being compiled.
Definition: MachineFunction.h:396
E
static GCRegistry::Add< CoreCLRGC > E("coreclr", "CoreCLR-compatible GC")
llvm::MachineOperand::getGlobal
const GlobalValue * getGlobal() const
Definition: MachineOperand.h:448
llvm::MachineInstr::getFlags
uint8_t getFlags() const
Return the MI flags bitvector.
Definition: MachineInstr.h:175
llvm::MachineOperand::CreateBA
static MachineOperand CreateBA(const BlockAddress *BA, int64_t Offset, unsigned char TargetFlags=0)
Definition: MachineOperand.h:716
llvm::BitVector::reset
BitVector & reset()
Definition: BitVector.h:439
llvm::MachineOperand::MO_BlockAddress
Address of a basic block.
Definition: MachineOperand.h:61
llvm::FunctionPass
FunctionPass class - This class is used to implement most global optimizations.
Definition: Pass.h:285
expand
static Expected< BitVector > expand(StringRef S, StringRef Original)
Definition: GlobPattern.cpp:28
llvm::AVRII::MO_HI
On a symbol operand, this represents the hi part.
Definition: AVRInstrInfo.h:56
llvm_unreachable
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
Definition: ErrorHandling.h:134
llvm::MachineInstr::memoperands_begin
mmo_iterator memoperands_begin() const
Access to memory operands of the instruction.
Definition: MachineInstr.h:374
llvm::MachineOperand
MachineOperand class - Representation of each machine instruction operand.
Definition: MachineOperand.h:47
llvm::MachineOperand::getImm
int64_t getImm() const
Definition: MachineOperand.h:422
EXPAND
#define EXPAND(Op)
llvm::AVRSubtarget
A specific AVR target MCU.
Definition: AVRSubtarget.h:32
llvm::createAVRExpandPseudoPass
FunctionPass * createAVRExpandPseudoPass()
llvm::AVRII::MO_LO
On a symbol operand, this represents the lo part.
Definition: AVRInstrInfo.h:53
llvm::MachineInstr::getParent
const MachineBasicBlock * getParent() const
Definition: MachineInstr.h:139
llvm::MachineRegisterInfo
MachineRegisterInfo - Keep track of information for virtual and physical registers, including vreg register classes, use/def chains for registers, etc.
Definition: MachineRegisterInfo.h:52
llvm::MachineFunctionProperties::set
MachineFunctionProperties & set(Property P)
Definition: MachineFunction.h:164
llvm::MachineInstr
Representation of each machine instruction.
Definition: MachineInstr.h:59
llvm::MachineBasicBlock::getParent
const MachineFunction * getParent() const
Return the MachineFunction containing this basic block.
Definition: MachineBasicBlock.h:155
llvm::RegScavenger::enterBasicBlock
void enterBasicBlock(MachineBasicBlock &MBB)
Start tracking liveness from the begin of basic block MBB.
Definition: RegisterScavenging.cpp:84
llvm::MCInstrInfo::get
const MCInstrDesc & get(unsigned Opcode) const
Return the machine instruction descriptor that corresponds to the specified instruction opcode...
Definition: MCInstrInfo.h:45
llvm::MachineOperand::getOffset
int64_t getOffset() const
Return the offset from the symbol in this operand.
Definition: MachineOperand.h:480
llvm::MachineOperand::getBlockAddress
const BlockAddress * getBlockAddress() const
Definition: MachineOperand.h:453
INITIALIZE_PASS
INITIALIZE_PASS(AVRExpandPseudo, "avr-expand-pseudo", AVR_EXPAND_PSEUDO_NAME, false, false) namespace llvm
Definition: AVRExpandPseudoInsts.cpp:1579
assert
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
llvm::AVRSubtarget::getRegisterInfo
const AVRRegisterInfo * getRegisterInfo() const override
Definition: AVRSubtarget.h:46
MI
IRTranslator LLVM IR MI
Definition: IRTranslator.cpp:80
llvm::StringRef
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:49
llvm::MachineInstr::getOperand
const MachineOperand & getOperand(unsigned i) const
Definition: MachineInstr.h:295
AVR_EXPAND_PSEUDO_NAME
#define AVR_EXPAND_PSEUDO_NAME
Definition: AVRExpandPseudoInsts.cpp:29
llvm::MachineOperand::getType
MachineOperandType getType() const
getType - Returns the MachineOperandType for this operand.
Definition: MachineOperand.h:197
llvm::initializeAVRExpandPseudoPass
void initializeAVRExpandPseudoPass(PassRegistry &)
llvm::MachineInstr::memoperands_end
mmo_iterator memoperands_end() const
Definition: MachineInstr.h:375
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