1 //===- ARMBaseInstrInfo.cpp - ARM Instruction Information -----------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains the Base ARM implementation of the TargetInstrInfo class.
12 //===----------------------------------------------------------------------===//
14 #include "ARMBaseInstrInfo.h"
16 #include "ARMAddressingModes.h"
17 #include "ARMGenInstrInfo.inc"
18 #include "ARMMachineFunctionInfo.h"
19 #include "llvm/ADT/STLExtras.h"
20 #include "llvm/CodeGen/LiveVariables.h"
21 #include "llvm/CodeGen/MachineFrameInfo.h"
22 #include "llvm/CodeGen/MachineInstrBuilder.h"
23 #include "llvm/CodeGen/MachineJumpTableInfo.h"
24 #include "llvm/Target/TargetAsmInfo.h"
25 #include "llvm/Support/CommandLine.h"
26 #include "llvm/Support/ErrorHandling.h"
30 EnableARM3Addr("enable-arm-3-addr-conv", cl::Hidden,
31 cl::desc("Enable ARM 2-addr to 3-addr conv"));
33 ARMBaseInstrInfo::ARMBaseInstrInfo(const ARMSubtarget &STI)
34 : TargetInstrInfoImpl(ARMInsts, array_lengthof(ARMInsts)) {
38 ARMBaseInstrInfo::convertToThreeAddress(MachineFunction::iterator &MFI,
39 MachineBasicBlock::iterator &MBBI,
40 LiveVariables *LV) const {
44 MachineInstr *MI = MBBI;
45 MachineFunction &MF = *MI->getParent()->getParent();
46 unsigned TSFlags = MI->getDesc().TSFlags;
48 switch ((TSFlags & ARMII::IndexModeMask) >> ARMII::IndexModeShift) {
50 case ARMII::IndexModePre:
53 case ARMII::IndexModePost:
57 // Try splitting an indexed load/store to an un-indexed one plus an add/sub
59 unsigned MemOpc = getUnindexedOpcode(MI->getOpcode());
63 MachineInstr *UpdateMI = NULL;
64 MachineInstr *MemMI = NULL;
65 unsigned AddrMode = (TSFlags & ARMII::AddrModeMask);
66 const TargetInstrDesc &TID = MI->getDesc();
67 unsigned NumOps = TID.getNumOperands();
68 bool isLoad = !TID.mayStore();
69 const MachineOperand &WB = isLoad ? MI->getOperand(1) : MI->getOperand(0);
70 const MachineOperand &Base = MI->getOperand(2);
71 const MachineOperand &Offset = MI->getOperand(NumOps-3);
72 unsigned WBReg = WB.getReg();
73 unsigned BaseReg = Base.getReg();
74 unsigned OffReg = Offset.getReg();
75 unsigned OffImm = MI->getOperand(NumOps-2).getImm();
76 ARMCC::CondCodes Pred = (ARMCC::CondCodes)MI->getOperand(NumOps-1).getImm();
79 assert(false && "Unknown indexed op!");
81 case ARMII::AddrMode2: {
82 bool isSub = ARM_AM::getAM2Op(OffImm) == ARM_AM::sub;
83 unsigned Amt = ARM_AM::getAM2Offset(OffImm);
85 if (ARM_AM::getSOImmVal(Amt) == -1)
86 // Can't encode it in a so_imm operand. This transformation will
87 // add more than 1 instruction. Abandon!
89 UpdateMI = BuildMI(MF, MI->getDebugLoc(),
90 get(isSub ? getOpcode(ARMII::SUBri) :
91 getOpcode(ARMII::ADDri)), WBReg)
92 .addReg(BaseReg).addImm(Amt)
93 .addImm(Pred).addReg(0).addReg(0);
94 } else if (Amt != 0) {
95 ARM_AM::ShiftOpc ShOpc = ARM_AM::getAM2ShiftOpc(OffImm);
96 unsigned SOOpc = ARM_AM::getSORegOpc(ShOpc, Amt);
97 UpdateMI = BuildMI(MF, MI->getDebugLoc(),
98 get(isSub ? getOpcode(ARMII::SUBrs) :
99 getOpcode(ARMII::ADDrs)), WBReg)
100 .addReg(BaseReg).addReg(OffReg).addReg(0).addImm(SOOpc)
101 .addImm(Pred).addReg(0).addReg(0);
103 UpdateMI = BuildMI(MF, MI->getDebugLoc(),
104 get(isSub ? getOpcode(ARMII::SUBrr) :
105 getOpcode(ARMII::ADDrr)), WBReg)
106 .addReg(BaseReg).addReg(OffReg)
107 .addImm(Pred).addReg(0).addReg(0);
110 case ARMII::AddrMode3 : {
111 bool isSub = ARM_AM::getAM3Op(OffImm) == ARM_AM::sub;
112 unsigned Amt = ARM_AM::getAM3Offset(OffImm);
114 // Immediate is 8-bits. It's guaranteed to fit in a so_imm operand.
115 UpdateMI = BuildMI(MF, MI->getDebugLoc(),
116 get(isSub ? getOpcode(ARMII::SUBri) :
117 getOpcode(ARMII::ADDri)), WBReg)
118 .addReg(BaseReg).addImm(Amt)
119 .addImm(Pred).addReg(0).addReg(0);
121 UpdateMI = BuildMI(MF, MI->getDebugLoc(),
122 get(isSub ? getOpcode(ARMII::SUBrr) :
123 getOpcode(ARMII::ADDrr)), WBReg)
124 .addReg(BaseReg).addReg(OffReg)
125 .addImm(Pred).addReg(0).addReg(0);
130 std::vector<MachineInstr*> NewMIs;
133 MemMI = BuildMI(MF, MI->getDebugLoc(),
134 get(MemOpc), MI->getOperand(0).getReg())
135 .addReg(WBReg).addReg(0).addImm(0).addImm(Pred);
137 MemMI = BuildMI(MF, MI->getDebugLoc(),
138 get(MemOpc)).addReg(MI->getOperand(1).getReg())
139 .addReg(WBReg).addReg(0).addImm(0).addImm(Pred);
140 NewMIs.push_back(MemMI);
141 NewMIs.push_back(UpdateMI);
144 MemMI = BuildMI(MF, MI->getDebugLoc(),
145 get(MemOpc), MI->getOperand(0).getReg())
146 .addReg(BaseReg).addReg(0).addImm(0).addImm(Pred);
148 MemMI = BuildMI(MF, MI->getDebugLoc(),
149 get(MemOpc)).addReg(MI->getOperand(1).getReg())
150 .addReg(BaseReg).addReg(0).addImm(0).addImm(Pred);
152 UpdateMI->getOperand(0).setIsDead();
153 NewMIs.push_back(UpdateMI);
154 NewMIs.push_back(MemMI);
157 // Transfer LiveVariables states, kill / dead info.
159 for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
160 MachineOperand &MO = MI->getOperand(i);
161 if (MO.isReg() && MO.getReg() &&
162 TargetRegisterInfo::isVirtualRegister(MO.getReg())) {
163 unsigned Reg = MO.getReg();
165 LiveVariables::VarInfo &VI = LV->getVarInfo(Reg);
167 MachineInstr *NewMI = (Reg == WBReg) ? UpdateMI : MemMI;
169 LV->addVirtualRegisterDead(Reg, NewMI);
171 if (MO.isUse() && MO.isKill()) {
172 for (unsigned j = 0; j < 2; ++j) {
173 // Look at the two new MI's in reverse order.
174 MachineInstr *NewMI = NewMIs[j];
175 if (!NewMI->readsRegister(Reg))
177 LV->addVirtualRegisterKilled(Reg, NewMI);
178 if (VI.removeKill(MI))
179 VI.Kills.push_back(NewMI);
187 MFI->insert(MBBI, NewMIs[1]);
188 MFI->insert(MBBI, NewMIs[0]);
194 ARMBaseInstrInfo::AnalyzeBranch(MachineBasicBlock &MBB,MachineBasicBlock *&TBB,
195 MachineBasicBlock *&FBB,
196 SmallVectorImpl<MachineOperand> &Cond,
197 bool AllowModify) const {
198 // If the block has no terminators, it just falls into the block after it.
199 MachineBasicBlock::iterator I = MBB.end();
200 if (I == MBB.begin() || !isUnpredicatedTerminator(--I))
203 // Get the last instruction in the block.
204 MachineInstr *LastInst = I;
206 // If there is only one terminator instruction, process it.
207 unsigned LastOpc = LastInst->getOpcode();
208 if (I == MBB.begin() || !isUnpredicatedTerminator(--I)) {
209 if (LastOpc == getOpcode(ARMII::B)) {
210 TBB = LastInst->getOperand(0).getMBB();
213 if (LastOpc == getOpcode(ARMII::Bcc)) {
214 // Block ends with fall-through condbranch.
215 TBB = LastInst->getOperand(0).getMBB();
216 Cond.push_back(LastInst->getOperand(1));
217 Cond.push_back(LastInst->getOperand(2));
220 return true; // Can't handle indirect branch.
223 // Get the instruction before it if it is a terminator.
224 MachineInstr *SecondLastInst = I;
226 // If there are three terminators, we don't know what sort of block this is.
227 if (SecondLastInst && I != MBB.begin() && isUnpredicatedTerminator(--I))
230 // If the block ends with ARMII::B and a ARMII::Bcc, handle it.
231 unsigned SecondLastOpc = SecondLastInst->getOpcode();
232 if ((SecondLastOpc == getOpcode(ARMII::Bcc)) &&
233 (LastOpc == getOpcode(ARMII::B))) {
234 TBB = SecondLastInst->getOperand(0).getMBB();
235 Cond.push_back(SecondLastInst->getOperand(1));
236 Cond.push_back(SecondLastInst->getOperand(2));
237 FBB = LastInst->getOperand(0).getMBB();
241 // If the block ends with two unconditional branches, handle it. The second
242 // one is not executed, so remove it.
243 if ((SecondLastOpc == getOpcode(ARMII::B)) &&
244 (LastOpc == getOpcode(ARMII::B))) {
245 TBB = SecondLastInst->getOperand(0).getMBB();
248 I->eraseFromParent();
252 // ...likewise if it ends with a branch table followed by an unconditional
253 // branch. The branch folder can create these, and we must get rid of them for
254 // correctness of Thumb constant islands.
255 if (((SecondLastOpc == getOpcode(ARMII::BR_JTr)) ||
256 (SecondLastOpc == getOpcode(ARMII::BR_JTm)) ||
257 (SecondLastOpc == getOpcode(ARMII::BR_JTadd))) &&
258 (LastOpc == getOpcode(ARMII::B))) {
261 I->eraseFromParent();
265 // Otherwise, can't handle this.
270 unsigned ARMBaseInstrInfo::RemoveBranch(MachineBasicBlock &MBB) const {
271 int BOpc = getOpcode(ARMII::B);
272 int BccOpc = getOpcode(ARMII::Bcc);
274 MachineBasicBlock::iterator I = MBB.end();
275 if (I == MBB.begin()) return 0;
277 if (I->getOpcode() != BOpc && I->getOpcode() != BccOpc)
280 // Remove the branch.
281 I->eraseFromParent();
285 if (I == MBB.begin()) return 1;
287 if (I->getOpcode() != BccOpc)
290 // Remove the branch.
291 I->eraseFromParent();
296 ARMBaseInstrInfo::InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
297 MachineBasicBlock *FBB,
298 const SmallVectorImpl<MachineOperand> &Cond) const {
299 // FIXME this should probably have a DebugLoc argument
300 DebugLoc dl = DebugLoc::getUnknownLoc();
301 int BOpc = getOpcode(ARMII::B);
302 int BccOpc = getOpcode(ARMII::Bcc);
304 // Shouldn't be a fall through.
305 assert(TBB && "InsertBranch must not be told to insert a fallthrough");
306 assert((Cond.size() == 2 || Cond.size() == 0) &&
307 "ARM branch conditions have two components!");
310 if (Cond.empty()) // Unconditional branch?
311 BuildMI(&MBB, dl, get(BOpc)).addMBB(TBB);
313 BuildMI(&MBB, dl, get(BccOpc)).addMBB(TBB)
314 .addImm(Cond[0].getImm()).addReg(Cond[1].getReg());
318 // Two-way conditional branch.
319 BuildMI(&MBB, dl, get(BccOpc)).addMBB(TBB)
320 .addImm(Cond[0].getImm()).addReg(Cond[1].getReg());
321 BuildMI(&MBB, dl, get(BOpc)).addMBB(FBB);
325 bool ARMBaseInstrInfo::
326 ReverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const {
327 ARMCC::CondCodes CC = (ARMCC::CondCodes)(int)Cond[0].getImm();
328 Cond[0].setImm(ARMCC::getOppositeCondition(CC));
332 bool ARMBaseInstrInfo::
333 PredicateInstruction(MachineInstr *MI,
334 const SmallVectorImpl<MachineOperand> &Pred) const {
335 unsigned Opc = MI->getOpcode();
336 if (Opc == getOpcode(ARMII::B)) {
337 MI->setDesc(get(getOpcode(ARMII::Bcc)));
338 MI->addOperand(MachineOperand::CreateImm(Pred[0].getImm()));
339 MI->addOperand(MachineOperand::CreateReg(Pred[1].getReg(), false));
343 int PIdx = MI->findFirstPredOperandIdx();
345 MachineOperand &PMO = MI->getOperand(PIdx);
346 PMO.setImm(Pred[0].getImm());
347 MI->getOperand(PIdx+1).setReg(Pred[1].getReg());
353 bool ARMBaseInstrInfo::
354 SubsumesPredicate(const SmallVectorImpl<MachineOperand> &Pred1,
355 const SmallVectorImpl<MachineOperand> &Pred2) const {
356 if (Pred1.size() > 2 || Pred2.size() > 2)
359 ARMCC::CondCodes CC1 = (ARMCC::CondCodes)Pred1[0].getImm();
360 ARMCC::CondCodes CC2 = (ARMCC::CondCodes)Pred2[0].getImm();
370 return CC2 == ARMCC::HI;
372 return CC2 == ARMCC::LO || CC2 == ARMCC::EQ;
374 return CC2 == ARMCC::GT;
376 return CC2 == ARMCC::LT;
380 bool ARMBaseInstrInfo::DefinesPredicate(MachineInstr *MI,
381 std::vector<MachineOperand> &Pred) const {
382 const TargetInstrDesc &TID = MI->getDesc();
383 if (!TID.getImplicitDefs() && !TID.hasOptionalDef())
387 for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
388 const MachineOperand &MO = MI->getOperand(i);
389 if (MO.isReg() && MO.getReg() == ARM::CPSR) {
399 /// FIXME: Works around a gcc miscompilation with -fstrict-aliasing
400 static unsigned getNumJTEntries(const std::vector<MachineJumpTableEntry> &JT,
401 unsigned JTI) DISABLE_INLINE;
402 static unsigned getNumJTEntries(const std::vector<MachineJumpTableEntry> &JT,
404 return JT[JTI].MBBs.size();
407 /// GetInstSize - Return the size of the specified MachineInstr.
409 unsigned ARMBaseInstrInfo::GetInstSizeInBytes(const MachineInstr *MI) const {
410 const MachineBasicBlock &MBB = *MI->getParent();
411 const MachineFunction *MF = MBB.getParent();
412 const TargetAsmInfo *TAI = MF->getTarget().getTargetAsmInfo();
414 // Basic size info comes from the TSFlags field.
415 const TargetInstrDesc &TID = MI->getDesc();
416 unsigned TSFlags = TID.TSFlags;
418 switch ((TSFlags & ARMII::SizeMask) >> ARMII::SizeShift) {
420 // If this machine instr is an inline asm, measure it.
421 if (MI->getOpcode() == ARM::INLINEASM)
422 return TAI->getInlineAsmLength(MI->getOperand(0).getSymbolName());
425 switch (MI->getOpcode()) {
427 llvm_unreachable("Unknown or unset size field for instr!");
428 case TargetInstrInfo::IMPLICIT_DEF:
429 case TargetInstrInfo::DECLARE:
430 case TargetInstrInfo::DBG_LABEL:
431 case TargetInstrInfo::EH_LABEL:
436 case ARMII::Size8Bytes: return 8; // Arm instruction x 2.
437 case ARMII::Size4Bytes: return 4; // Arm instruction.
438 case ARMII::Size2Bytes: return 2; // Thumb instruction.
439 case ARMII::SizeSpecial: {
440 switch (MI->getOpcode()) {
441 case ARM::CONSTPOOL_ENTRY:
442 // If this machine instr is a constant pool entry, its size is recorded as
444 return MI->getOperand(2).getImm();
445 case ARM::Int_eh_sjlj_setjmp: return 12;
451 case ARM::t2BR_JTadd:
453 // These are jumptable branches, i.e. a branch followed by an inlined
454 // jumptable. The size is 4 + 4 * number of entries.
455 unsigned NumOps = TID.getNumOperands();
456 MachineOperand JTOP =
457 MI->getOperand(NumOps - (TID.isPredicable() ? 3 : 2));
458 unsigned JTI = JTOP.getIndex();
459 const MachineJumpTableInfo *MJTI = MF->getJumpTableInfo();
460 const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
461 assert(JTI < JT.size());
462 // Thumb instructions are 2 byte aligned, but JT entries are 4 byte
463 // 4 aligned. The assembler / linker may add 2 byte padding just before
464 // the JT entries. The size does not include this padding; the
465 // constant islands pass does separate bookkeeping for it.
466 // FIXME: If we know the size of the function is less than (1 << 16) *2
467 // bytes, we can use 16-bit entries instead. Then there won't be an
469 return getNumJTEntries(JT, JTI) * 4 +
470 ((MI->getOpcode()==ARM::tBR_JTr) ? 2 : 4);
473 // Otherwise, pseudo-instruction sizes are zero.
478 return 0; // Not reached
481 /// Return true if the instruction is a register to register move and
482 /// leave the source and dest operands in the passed parameters.
485 ARMBaseInstrInfo::isMoveInstr(const MachineInstr &MI,
486 unsigned &SrcReg, unsigned &DstReg,
487 unsigned& SrcSubIdx, unsigned& DstSubIdx) const {
488 SrcSubIdx = DstSubIdx = 0; // No sub-registers.
490 unsigned oc = MI.getOpcode();
491 if ((oc == getOpcode(ARMII::FCPYS)) ||
492 (oc == getOpcode(ARMII::FCPYD)) ||
493 (oc == getOpcode(ARMII::VMOVD)) ||
494 (oc == getOpcode(ARMII::VMOVQ))) {
495 SrcReg = MI.getOperand(1).getReg();
496 DstReg = MI.getOperand(0).getReg();
499 else if (oc == getOpcode(ARMII::MOVr)) {
500 assert(MI.getDesc().getNumOperands() >= 2 &&
501 MI.getOperand(0).isReg() &&
502 MI.getOperand(1).isReg() &&
503 "Invalid ARM MOV instruction");
504 SrcReg = MI.getOperand(1).getReg();
505 DstReg = MI.getOperand(0).getReg();
513 ARMBaseInstrInfo::isLoadFromStackSlot(const MachineInstr *MI,
514 int &FrameIndex) const {
515 unsigned oc = MI->getOpcode();
516 if (oc == getOpcode(ARMII::LDR)) {
517 if (MI->getOperand(1).isFI() &&
518 MI->getOperand(2).isReg() &&
519 MI->getOperand(3).isImm() &&
520 MI->getOperand(2).getReg() == 0 &&
521 MI->getOperand(3).getImm() == 0) {
522 FrameIndex = MI->getOperand(1).getIndex();
523 return MI->getOperand(0).getReg();
526 else if ((oc == getOpcode(ARMII::FLDD)) ||
527 (oc == getOpcode(ARMII::FLDS))) {
528 if (MI->getOperand(1).isFI() &&
529 MI->getOperand(2).isImm() &&
530 MI->getOperand(2).getImm() == 0) {
531 FrameIndex = MI->getOperand(1).getIndex();
532 return MI->getOperand(0).getReg();
540 ARMBaseInstrInfo::isStoreToStackSlot(const MachineInstr *MI,
541 int &FrameIndex) const {
542 unsigned oc = MI->getOpcode();
543 if (oc == getOpcode(ARMII::STR)) {
544 if (MI->getOperand(1).isFI() &&
545 MI->getOperand(2).isReg() &&
546 MI->getOperand(3).isImm() &&
547 MI->getOperand(2).getReg() == 0 &&
548 MI->getOperand(3).getImm() == 0) {
549 FrameIndex = MI->getOperand(1).getIndex();
550 return MI->getOperand(0).getReg();
553 else if ((oc == getOpcode(ARMII::FSTD)) ||
554 (oc == getOpcode(ARMII::FSTS))) {
555 if (MI->getOperand(1).isFI() &&
556 MI->getOperand(2).isImm() &&
557 MI->getOperand(2).getImm() == 0) {
558 FrameIndex = MI->getOperand(1).getIndex();
559 return MI->getOperand(0).getReg();
567 ARMBaseInstrInfo::copyRegToReg(MachineBasicBlock &MBB,
568 MachineBasicBlock::iterator I,
569 unsigned DestReg, unsigned SrcReg,
570 const TargetRegisterClass *DestRC,
571 const TargetRegisterClass *SrcRC) const {
572 DebugLoc DL = DebugLoc::getUnknownLoc();
573 if (I != MBB.end()) DL = I->getDebugLoc();
575 if (DestRC != SrcRC) {
576 // Not yet supported!
580 if (DestRC == ARM::GPRRegisterClass)
581 AddDefaultCC(AddDefaultPred(BuildMI(MBB, I, DL, get(getOpcode(ARMII::MOVr)),
582 DestReg).addReg(SrcReg)));
583 else if (DestRC == ARM::SPRRegisterClass)
584 AddDefaultPred(BuildMI(MBB, I, DL, get(getOpcode(ARMII::FCPYS)), DestReg)
586 else if (DestRC == ARM::DPRRegisterClass)
587 AddDefaultPred(BuildMI(MBB, I, DL, get(getOpcode(ARMII::FCPYD)), DestReg)
589 else if (DestRC == ARM::QPRRegisterClass)
590 BuildMI(MBB, I, DL, get(getOpcode(ARMII::VMOVQ)), DestReg).addReg(SrcReg);
597 void ARMBaseInstrInfo::
598 storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
599 unsigned SrcReg, bool isKill, int FI,
600 const TargetRegisterClass *RC) const {
601 DebugLoc DL = DebugLoc::getUnknownLoc();
602 if (I != MBB.end()) DL = I->getDebugLoc();
604 if (RC == ARM::GPRRegisterClass) {
605 AddDefaultPred(BuildMI(MBB, I, DL, get(getOpcode(ARMII::STR)))
606 .addReg(SrcReg, getKillRegState(isKill))
607 .addFrameIndex(FI).addReg(0).addImm(0));
608 } else if (RC == ARM::DPRRegisterClass) {
609 AddDefaultPred(BuildMI(MBB, I, DL, get(getOpcode(ARMII::FSTD)))
610 .addReg(SrcReg, getKillRegState(isKill))
611 .addFrameIndex(FI).addImm(0));
613 assert(RC == ARM::SPRRegisterClass && "Unknown regclass!");
614 AddDefaultPred(BuildMI(MBB, I, DL, get(getOpcode(ARMII::FSTS)))
615 .addReg(SrcReg, getKillRegState(isKill))
616 .addFrameIndex(FI).addImm(0));
621 ARMBaseInstrInfo::storeRegToAddr(MachineFunction &MF, unsigned SrcReg,
623 SmallVectorImpl<MachineOperand> &Addr,
624 const TargetRegisterClass *RC,
625 SmallVectorImpl<MachineInstr*> &NewMIs) const{
626 DebugLoc DL = DebugLoc::getUnknownLoc();
628 if (RC == ARM::GPRRegisterClass) {
629 Opc = getOpcode(ARMII::STR);
630 } else if (RC == ARM::DPRRegisterClass) {
631 Opc = getOpcode(ARMII::FSTD);
633 assert(RC == ARM::SPRRegisterClass && "Unknown regclass!");
634 Opc = getOpcode(ARMII::FSTS);
637 MachineInstrBuilder MIB =
638 BuildMI(MF, DL, get(Opc)).addReg(SrcReg, getKillRegState(isKill));
639 for (unsigned i = 0, e = Addr.size(); i != e; ++i)
640 MIB.addOperand(Addr[i]);
642 NewMIs.push_back(MIB);
646 void ARMBaseInstrInfo::
647 loadRegFromStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
648 unsigned DestReg, int FI,
649 const TargetRegisterClass *RC) const {
650 DebugLoc DL = DebugLoc::getUnknownLoc();
651 if (I != MBB.end()) DL = I->getDebugLoc();
653 if (RC == ARM::GPRRegisterClass) {
654 AddDefaultPred(BuildMI(MBB, I, DL, get(getOpcode(ARMII::LDR)), DestReg)
655 .addFrameIndex(FI).addReg(0).addImm(0));
656 } else if (RC == ARM::DPRRegisterClass) {
657 AddDefaultPred(BuildMI(MBB, I, DL, get(getOpcode(ARMII::FLDD)), DestReg)
658 .addFrameIndex(FI).addImm(0));
660 assert(RC == ARM::SPRRegisterClass && "Unknown regclass!");
661 AddDefaultPred(BuildMI(MBB, I, DL, get(getOpcode(ARMII::FLDS)), DestReg)
662 .addFrameIndex(FI).addImm(0));
666 void ARMBaseInstrInfo::
667 loadRegFromAddr(MachineFunction &MF, unsigned DestReg,
668 SmallVectorImpl<MachineOperand> &Addr,
669 const TargetRegisterClass *RC,
670 SmallVectorImpl<MachineInstr*> &NewMIs) const {
671 DebugLoc DL = DebugLoc::getUnknownLoc();
673 if (RC == ARM::GPRRegisterClass) {
674 Opc = getOpcode(ARMII::LDR);
675 } else if (RC == ARM::DPRRegisterClass) {
676 Opc = getOpcode(ARMII::FLDD);
678 assert(RC == ARM::SPRRegisterClass && "Unknown regclass!");
679 Opc = getOpcode(ARMII::FLDS);
682 MachineInstrBuilder MIB = BuildMI(MF, DL, get(Opc), DestReg);
683 for (unsigned i = 0, e = Addr.size(); i != e; ++i)
684 MIB.addOperand(Addr[i]);
686 NewMIs.push_back(MIB);
690 MachineInstr *ARMBaseInstrInfo::
691 foldMemoryOperandImpl(MachineFunction &MF, MachineInstr *MI,
692 const SmallVectorImpl<unsigned> &Ops, int FI) const {
693 if (Ops.size() != 1) return NULL;
695 unsigned OpNum = Ops[0];
696 unsigned Opc = MI->getOpcode();
697 MachineInstr *NewMI = NULL;
698 if (Opc == getOpcode(ARMII::MOVr)) {
699 // If it is updating CPSR, then it cannot be folded.
700 if (MI->getOperand(4).getReg() != ARM::CPSR) {
701 unsigned Pred = MI->getOperand(2).getImm();
702 unsigned PredReg = MI->getOperand(3).getReg();
703 if (OpNum == 0) { // move -> store
704 unsigned SrcReg = MI->getOperand(1).getReg();
705 bool isKill = MI->getOperand(1).isKill();
706 bool isUndef = MI->getOperand(1).isUndef();
707 NewMI = BuildMI(MF, MI->getDebugLoc(), get(getOpcode(ARMII::STR)))
708 .addReg(SrcReg, getKillRegState(isKill) | getUndefRegState(isUndef))
709 .addFrameIndex(FI).addReg(0).addImm(0).addImm(Pred).addReg(PredReg);
710 } else { // move -> load
711 unsigned DstReg = MI->getOperand(0).getReg();
712 bool isDead = MI->getOperand(0).isDead();
713 bool isUndef = MI->getOperand(0).isUndef();
714 NewMI = BuildMI(MF, MI->getDebugLoc(), get(getOpcode(ARMII::LDR)))
717 getDeadRegState(isDead) |
718 getUndefRegState(isUndef))
719 .addFrameIndex(FI).addReg(0).addImm(0).addImm(Pred).addReg(PredReg);
723 else if (Opc == getOpcode(ARMII::FCPYS)) {
724 unsigned Pred = MI->getOperand(2).getImm();
725 unsigned PredReg = MI->getOperand(3).getReg();
726 if (OpNum == 0) { // move -> store
727 unsigned SrcReg = MI->getOperand(1).getReg();
728 bool isKill = MI->getOperand(1).isKill();
729 bool isUndef = MI->getOperand(1).isUndef();
730 NewMI = BuildMI(MF, MI->getDebugLoc(), get(getOpcode(ARMII::FSTS)))
731 .addReg(SrcReg, getKillRegState(isKill) | getUndefRegState(isUndef))
733 .addImm(0).addImm(Pred).addReg(PredReg);
734 } else { // move -> load
735 unsigned DstReg = MI->getOperand(0).getReg();
736 bool isDead = MI->getOperand(0).isDead();
737 bool isUndef = MI->getOperand(0).isUndef();
738 NewMI = BuildMI(MF, MI->getDebugLoc(), get(getOpcode(ARMII::FLDS)))
741 getDeadRegState(isDead) |
742 getUndefRegState(isUndef))
743 .addFrameIndex(FI).addImm(0).addImm(Pred).addReg(PredReg);
746 else if (Opc == getOpcode(ARMII::FCPYD)) {
747 unsigned Pred = MI->getOperand(2).getImm();
748 unsigned PredReg = MI->getOperand(3).getReg();
749 if (OpNum == 0) { // move -> store
750 unsigned SrcReg = MI->getOperand(1).getReg();
751 bool isKill = MI->getOperand(1).isKill();
752 bool isUndef = MI->getOperand(1).isUndef();
753 NewMI = BuildMI(MF, MI->getDebugLoc(), get(getOpcode(ARMII::FSTD)))
754 .addReg(SrcReg, getKillRegState(isKill) | getUndefRegState(isUndef))
755 .addFrameIndex(FI).addImm(0).addImm(Pred).addReg(PredReg);
756 } else { // move -> load
757 unsigned DstReg = MI->getOperand(0).getReg();
758 bool isDead = MI->getOperand(0).isDead();
759 bool isUndef = MI->getOperand(0).isUndef();
760 NewMI = BuildMI(MF, MI->getDebugLoc(), get(getOpcode(ARMII::FLDD)))
763 getDeadRegState(isDead) |
764 getUndefRegState(isUndef))
765 .addFrameIndex(FI).addImm(0).addImm(Pred).addReg(PredReg);
773 ARMBaseInstrInfo::foldMemoryOperandImpl(MachineFunction &MF,
775 const SmallVectorImpl<unsigned> &Ops,
776 MachineInstr* LoadMI) const {
781 ARMBaseInstrInfo::canFoldMemoryOperand(const MachineInstr *MI,
782 const SmallVectorImpl<unsigned> &Ops) const {
783 if (Ops.size() != 1) return false;
785 unsigned Opc = MI->getOpcode();
786 if (Opc == getOpcode(ARMII::MOVr)) {
787 // If it is updating CPSR, then it cannot be folded.
788 return MI->getOperand(4).getReg() != ARM::CPSR;
790 else if ((Opc == getOpcode(ARMII::FCPYS)) ||
791 (Opc == getOpcode(ARMII::FCPYD))) {
794 else if ((Opc == getOpcode(ARMII::VMOVD)) ||
795 (Opc == getOpcode(ARMII::VMOVQ))) {
796 return false; // FIXME