33#define DEBUG_TYPE "framelowering"
34STATISTIC(NumPESpillVSR,
"Number of spills to vector in prologue");
35STATISTIC(NumPEReloadVSR,
"Number of reloads from vector in epilogue");
36STATISTIC(NumPrologProbed,
"Number of prologues probed");
40 cl::desc(
"Enable spills in prologue to vector registers."),
58 return STI.
isPPC64() ? -8U : -4U;
75 return STI.
isPPC64() ? -16U : -8U;
84 STI.getPlatformStackAlignment(), 0),
94 unsigned &NumEntries)
const {
97#define CALLEE_SAVED_FPRS \
119#define CALLEE_SAVED_GPRS32 \
140#define CALLEE_SAVED_GPRS64 \
161#define CALLEE_SAVED_VRS \
178 static const SpillSlot ELFOffsets32[] = {
213 static const SpillSlot ELFOffsets64[] = {
228 static const SpillSlot AIXOffsets64[] = {
232 NumEntries = std::size(ELFOffsets64);
237 NumEntries = std::size(ELFOffsets32);
244 NumEntries = std::size(AIXOffsets64);
248 NumEntries = std::size(AIXOffsets32);
285 bool UseEstimate)
const {
286 unsigned NewMaxCallFrameSize = 0;
288 &NewMaxCallFrameSize);
299 unsigned *NewMaxCallFrameSize)
const {
310 Align Alignment = std::max(TargetAlign, MaxAlign);
314 unsigned LR = RegInfo->getRARegister();
327 if (!DisableRedZone && CanUseRedZone && FitsInRedZone) {
337 maxCallFrameSize = std::max(maxCallFrameSize, minCallFrameSize);
342 maxCallFrameSize =
alignTo(maxCallFrameSize, Alignment);
345 if (NewMaxCallFrameSize)
346 *NewMaxCallFrameSize = maxCallFrameSize;
349 FrameSize += maxCallFrameSize;
352 FrameSize =
alignTo(FrameSize, Alignment);
387 unsigned FPReg = is31 ? PPC::R31 : PPC::R1;
388 unsigned FP8Reg = is31 ? PPC::X31 : PPC::X1;
393 unsigned BP8Reg = HasBP ? (
unsigned) PPC::X30 : FP8Reg;
402 switch (MO.getReg()) {
440 bool TwoUniqueRegsRequired,
452 assert (SR1 &&
"Asking for the second scratch register but not the first?");
495 for (
int i = 0; CSRegs[i]; ++i)
501 *SR1 = FirstScratchReg == -1 ? (
unsigned)PPC::NoRegister : FirstScratchReg;
508 int SecondScratchReg = BV.
find_next(*SR1);
509 if (SecondScratchReg != -1)
510 *SR2 = SecondScratchReg;
512 *SR2 = TwoUniqueRegsRequired ?
Register() : *SR1;
517 if (BV.
count() < (TwoUniqueRegsRequired ? 2U : 1U))
534 bool HasBP =
RegInfo->hasBasePointer(MF);
536 int NegFrameSize = -FrameSize;
537 bool IsLargeFrame = !isInt<16>(NegFrameSize);
543 return ((IsLargeFrame || !HasRedZone) && HasBP && MaxAlign > 1) ||
550 return findScratchRegister(TmpMBB,
false,
551 twoUniqueScratchRegsRequired(TmpMBB));
557 return findScratchRegister(TmpMBB,
true);
560bool PPCFrameLowering::stackUpdateCanBeMoved(
MachineFunction &MF)
const {
618 const bool HasFastMFLR = Subtarget.hasFastMFLR();
621 bool isPPC64 = Subtarget.
isPPC64();
625 assert((isSVR4ABI || Subtarget.
isAIXABI()) &&
"Unsupported PPC ABI.");
629 int64_t NegFrameSize = -FrameSize;
630 if (!isPPC64 && (!isInt<32>(FrameSize) || !isInt<32>(NegFrameSize)))
641 bool MustSaveCR = !MustSaveCRs.
empty();
643 bool HasFP =
hasFP(MF);
645 bool HasRedZone = isPPC64 || !isSVR4ABI;
646 bool HasROPProtect = Subtarget.hasROPProtect();
647 bool HasPrivileged = Subtarget.hasPrivileged();
649 Register SPReg = isPPC64 ? PPC::X1 : PPC::R1;
651 Register FPReg = isPPC64 ? PPC::X31 : PPC::R31;
652 Register LRReg = isPPC64 ? PPC::LR8 : PPC::LR;
653 Register TOCReg = isPPC64 ? PPC::X2 : PPC::R2;
655 Register TempReg = isPPC64 ? PPC::X12 : PPC::R12;
663 const MCInstrDesc& StoreUpdtIdxInst =
TII.get(isPPC64 ? PPC::STDUX
667 const MCInstrDesc& SubtractCarryingInst =
TII.get(isPPC64 ? PPC::SUBFC8
669 const MCInstrDesc& SubtractImmCarryingInst =
TII.get(isPPC64 ? PPC::SUBFIC8
671 const MCInstrDesc &MoveFromCondRegInst =
TII.get(isPPC64 ? PPC::MFCR8
673 const MCInstrDesc &StoreWordInst =
TII.get(isPPC64 ? PPC::STW8 : PPC::STW);
675 TII.get(isPPC64 ? (HasPrivileged ? PPC::HASHSTP8 : PPC::HASHST8)
676 : (HasPrivileged ? PPC::HASHSTP : PPC::HASHST));
683 "FrameSize must be >0 to save/restore the FP or LR for 32-bit SVR4.");
686 bool SingleScratchReg = findScratchRegister(
687 &
MBB,
false, twoUniqueScratchRegsRequired(&
MBB), &ScratchReg, &TempReg);
688 assert(SingleScratchReg &&
689 "Required number of registers not available in this block");
691 SingleScratchReg = ScratchReg == TempReg;
695 int64_t FPOffset = 0;
699 assert(FPIndex &&
"No Frame Pointer Save Slot!");
703 int64_t BPOffset = 0;
707 assert(BPIndex &&
"No Base Pointer Save Slot!");
711 int64_t PBPOffset = 0;
715 assert(PBPIndex &&
"No PIC Base Pointer Save Slot!");
721 if (HasBP && MaxAlign > 1)
722 assert(
Log2(MaxAlign) < 16 &&
"Invalid alignment!");
726 bool isLargeFrame = !isInt<16>(NegFrameSize);
732 bool MovingStackUpdateDown =
false;
735 if (stackUpdateCanBeMoved(MF)) {
748 if (CSI.isSpilledToReg()) {
749 StackUpdateLoc =
MBBI;
750 MovingStackUpdateDown =
false;
754 int FrIdx = CSI.getFrameIdx();
763 MovingStackUpdateDown =
true;
767 StackUpdateLoc =
MBBI;
768 MovingStackUpdateDown =
false;
774 if (MovingStackUpdateDown) {
776 int FrIdx = CSI.getFrameIdx();
786 auto BuildMoveFromCR = [&]() {
787 if (isELFv2ABI && MustSaveCRs.
size() == 1) {
792 assert(isPPC64 &&
"V2 ABI is 64-bit only.");
799 for (
unsigned CRfield : MustSaveCRs)
806 if (MustSaveCR && SingleScratchReg &&
MustSaveLR) {
817 if (MustSaveCR && !(SingleScratchReg &&
MustSaveLR))
841 auto SaveLR = [&](int64_t
Offset) {
857 assert((ImmOffset <= -8 && ImmOffset >= -512) &&
858 "ROP hash save offset out of range.");
859 assert(((ImmOffset & 0x7) == 0) &&
860 "ROP hash save offset must be 8 byte aligned.");
873 assert(HasRedZone &&
"A red zone is always available on PPC64");
890 if (HasBP && HasRedZone) {
901 (HasBP && MaxAlign > 1) || isLargeFrame;
909 (HasSTUX || !isInt<16>(FrameSize + LROffset)))
919 TII.get(isPPC64 ? PPC::PROBED_STACKALLOC_64
920 : PPC::PROBED_STACKALLOC_32))
934 if (HasBP && MaxAlign > 1) {
951 assert(!SingleScratchReg &&
"Only a single scratch reg available");
952 TII.materializeImmPostRA(
MBB,
MBBI, dl, TempReg, NegFrameSize);
962 }
else if (!isLargeFrame) {
963 BuildMI(
MBB, StackUpdateLoc, dl, StoreUpdtInst, SPReg)
968 TII.materializeImmPostRA(
MBB,
MBBI, dl, ScratchReg, NegFrameSize);
979 assert(isELFv2ABI &&
"TOC saves in the prologue only supported on ELFv2");
987 assert(!isPPC64 &&
"A red zone is always available on PPC64");
1003 if (ScratchReg == PPC::R0) {
1012 .
addImm(FPOffset-LastOffset);
1013 LastOffset = FPOffset;
1024 .
addImm(PBPOffset-LastOffset);
1025 LastOffset = PBPOffset;
1035 .
addImm(BPOffset-LastOffset);
1036 LastOffset = BPOffset;
1080 .
addImm(FrameSize + FPOffset)
1085 .
addImm(FrameSize + PBPOffset)
1090 .
addImm(FrameSize + BPOffset)
1100 if (!HasSTUX &&
MustSaveLR && !HasFastMFLR && isInt<16>(FrameSize + LROffset))
1101 SaveLR(LROffset + FrameSize);
1111 unsigned Reg =
MRI->getDwarfRegNum(BPReg,
true);
1125 unsigned Reg =
MRI->getDwarfRegNum(FPReg,
true);
1134 unsigned Reg =
MRI->getDwarfRegNum(PPC::R30,
true);
1143 unsigned Reg =
MRI->getDwarfRegNum(BPReg,
true);
1152 unsigned Reg =
MRI->getDwarfRegNum(LRReg,
true);
1166 if (!HasBP && needsCFI) {
1169 unsigned Reg =
MRI->getDwarfRegNum(FPReg,
true);
1184 if (Reg == PPC::LR || Reg == PPC::LR8 || Reg == PPC::RM)
continue;
1188 if (PPC::CRBITRCRegClass.
contains(Reg))
1191 if ((Reg == PPC::X2 || Reg == PPC::R2) && MustSaveTOC)
1196 if (isSVR4ABI && isPPC64 && (PPC::CR2 <= Reg && Reg <= PPC::CR4)) {
1200 Register CRReg = isELFv2ABI? Reg : PPC::CR2;
1202 nullptr,
MRI->getDwarfRegNum(CRReg,
true), CRSaveOffset));
1208 if (
I.isSpilledToReg()) {
1209 unsigned SpilledReg =
I.getDstReg();
1211 nullptr,
MRI->getDwarfRegNum(Reg,
true),
1212 MRI->getDwarfRegNum(SpilledReg,
true)));
1220 if (MovingStackUpdateDown)
1224 nullptr,
MRI->getDwarfRegNum(Reg,
true),
Offset));
1234 bool isPPC64 = Subtarget.
isPPC64();
1243 int Opc =
MI.getOpcode();
1244 return Opc == PPC::PROBED_STACKALLOC_64 || Opc == PPC::PROBED_STACKALLOC_32;
1246 if (StackAllocMIPos == PrologMBB.
end())
1252 int64_t NegFrameSize =
MI.getOperand(2).getImm();
1254 int64_t NegProbeSize = -(int64_t)ProbeSize;
1255 assert(isInt<32>(NegProbeSize) &&
"Unhandled probe size");
1256 int64_t NumBlocks = NegFrameSize / NegProbeSize;
1257 int64_t NegResidualSize = NegFrameSize % NegProbeSize;
1258 Register SPReg = isPPC64 ? PPC::X1 : PPC::R1;
1259 Register ScratchReg =
MI.getOperand(0).getReg();
1266 const MCInstrDesc &CopyInst =
TII.get(isPPC64 ? PPC::OR8 : PPC::OR);
1270 unsigned RegNum =
MRI->getDwarfRegNum(Reg,
true);
1279 unsigned RegNum =
MRI->getDwarfRegNum(Reg,
true);
1286 auto CanUseDForm = [](int64_t Imm) {
return isInt<16>(Imm) && Imm % 4 == 0; };
1291 assert(isInt<32>(Imm) &&
"Unhandled imm");
1306 Register NegSizeReg,
bool UseDForm,
1348 assert(HasBP &&
"The function is supposed to have base pointer when its "
1349 "stack is realigned.");
1357 "Probe size should be larger or equal to the size of red-zone so "
1358 "that red-zone is not clobbered by probing.");
1364 NegProbeSize = std::max(NegProbeSize, -((int64_t)1 << 15));
1365 assert(isInt<16>(NegProbeSize) &&
1366 "NegProbeSize should be materializable by DForm");
1383 MF.
insert(MBBInsertPoint, ProbeLoopBodyMBB);
1385 MF.
insert(MBBInsertPoint, ProbeExitMBB);
1388 Register BackChainPointer = HasRedZone ? BPReg : TempReg;
1389 allocateAndProbe(*ProbeExitMBB, ProbeExitMBB->
end(), 0, ScratchReg,
false,
1394 BuildMI(*ProbeExitMBB, ProbeExitMBB->
end(),
DL, CopyInst, TempReg)
1402 BuildMI(&
MBB,
DL,
TII.get(isPPC64 ? PPC::SUBF8 : PPC::SUBF), ScratchReg)
1419 Register BackChainPointer = HasRedZone ? BPReg : TempReg;
1420 allocateAndProbe(*ProbeLoopBodyMBB, ProbeLoopBodyMBB->
end(), NegProbeSize,
1421 0,
true , BackChainPointer);
1422 BuildMI(ProbeLoopBodyMBB,
DL,
TII.get(isPPC64 ? PPC::ADDI8 : PPC::ADDI),
1426 BuildMI(ProbeLoopBodyMBB,
DL,
TII.get(isPPC64 ? PPC::CMPDI : PPC::CMPWI),
1433 .
addMBB(ProbeLoopBodyMBB);
1438 bool anyChange =
false;
1442 }
while (anyChange);
1443 return ProbeExitMBB;
1448 if (HasBP && MaxAlign > 1) {
1461 BuildMI(*CurrentMBB, {
MI},
DL,
TII.get(isPPC64 ? PPC::SUBF8 : PPC::SUBF),
1465 MaterializeImm(*CurrentMBB, {
MI}, NegFrameSize, ScratchReg);
1466 BuildMI(*CurrentMBB, {
MI},
DL,
TII.get(isPPC64 ? PPC::ADD8 : PPC::ADD4),
1470 CurrentMBB = probeRealignedStack(*CurrentMBB, {
MI}, ScratchReg, FPReg);
1478 buildDefCFA(*CurrentMBB, {
MI}, FPReg, 0);
1480 if (NegResidualSize) {
1481 bool ResidualUseDForm = CanUseDForm(NegResidualSize);
1482 if (!ResidualUseDForm)
1483 MaterializeImm(*CurrentMBB, {
MI}, NegResidualSize, ScratchReg);
1484 allocateAndProbe(*CurrentMBB, {
MI}, NegResidualSize, ScratchReg,
1485 ResidualUseDForm, FPReg);
1487 bool UseDForm = CanUseDForm(NegProbeSize);
1489 if (NumBlocks < 3) {
1491 MaterializeImm(*CurrentMBB, {
MI}, NegProbeSize, ScratchReg);
1492 for (
int i = 0; i < NumBlocks; ++i)
1493 allocateAndProbe(*CurrentMBB, {
MI}, NegProbeSize, ScratchReg, UseDForm,
1504 MaterializeImm(*CurrentMBB, {
MI}, NumBlocks, ScratchReg);
1505 BuildMI(*CurrentMBB, {
MI},
DL,
TII.get(isPPC64 ? PPC::MTCTR8 : PPC::MTCTR))
1508 MaterializeImm(*CurrentMBB, {
MI}, NegProbeSize, ScratchReg);
1513 MF.
insert(MBBInsertPoint, LoopMBB);
1515 MF.
insert(MBBInsertPoint, ExitMBB);
1517 allocateAndProbe(*LoopMBB, LoopMBB->
end(), NegProbeSize, ScratchReg,
1519 BuildMI(LoopMBB,
DL,
TII.get(isPPC64 ? PPC::BDNZ8 : PPC::BDNZ))
1524 ExitMBB->
splice(ExitMBB->
end(), CurrentMBB,
1534 bool anyChange =
false;
1537 }
while (anyChange);
1541 MI.eraseFromParent();
1550 dl =
MBBI->getDebugLoc();
1562 bool isPPC64 = Subtarget.
isPPC64();
1568 bool MustSaveCR = !MustSaveCRs.
empty();
1570 bool HasFP =
hasFP(MF);
1573 bool HasROPProtect = Subtarget.hasROPProtect();
1574 bool HasPrivileged = Subtarget.hasPrivileged();
1576 Register SPReg = isPPC64 ? PPC::X1 : PPC::R1;
1578 Register FPReg = isPPC64 ? PPC::X31 : PPC::R31;
1580 Register TempReg = isPPC64 ? PPC::X12 : PPC::R12;
1585 const MCInstrDesc& LoadImmShiftedInst =
TII.get( isPPC64 ? PPC::LIS8
1597 const MCInstrDesc& MoveToCRInst =
TII.get( isPPC64 ? PPC::MTOCRF8
1600 TII.get(isPPC64 ? (HasPrivileged ? PPC::HASHCHKP8 : PPC::HASHCHK8)
1601 : (HasPrivileged ? PPC::HASHCHKP : PPC::HASHCHK));
1604 int64_t FPOffset = 0;
1607 bool SingleScratchReg = findScratchRegister(&
MBB,
true,
false, &ScratchReg,
1609 assert(SingleScratchReg &&
1610 "Could not find an available scratch register");
1612 SingleScratchReg = ScratchReg == TempReg;
1616 assert(FPIndex &&
"No Frame Pointer Save Slot!");
1620 int64_t BPOffset = 0;
1623 assert(BPIndex &&
"No Base Pointer Save Slot!");
1627 int64_t PBPOffset = 0;
1630 assert(PBPIndex &&
"No PIC Base Pointer Save Slot!");
1636 if (IsReturnBlock) {
1637 unsigned RetOpcode =
MBBI->getOpcode();
1638 bool UsesTCRet = RetOpcode == PPC::TCRETURNri ||
1639 RetOpcode == PPC::TCRETURNdi ||
1640 RetOpcode == PPC::TCRETURNai ||
1641 RetOpcode == PPC::TCRETURNri8 ||
1642 RetOpcode == PPC::TCRETURNdi8 ||
1643 RetOpcode == PPC::TCRETURNai8;
1648 assert(StackAdjust.
isImm() &&
"Expecting immediate value.");
1650 int StackAdj = StackAdjust.
getImm();
1651 int Delta = StackAdj - MaxTCRetDelta;
1652 assert((Delta >= 0) &&
"Delta must be positive");
1653 if (MaxTCRetDelta>0)
1654 FrameSize += (StackAdj +Delta);
1656 FrameSize += StackAdj;
1662 bool isLargeFrame = !isInt<16>(FrameSize);
1676 unsigned RBReg = SPReg;
1684 if (stackUpdateCanBeMoved(MF)) {
1689 if (CSI.isSpilledToReg()) {
1690 StackUpdateLoc =
MBBI;
1693 int FrIdx = CSI.getFrameIdx();
1705 StackUpdateLoc =
MBBI;
1718 if (HasRedZone && HasBP) {
1728 assert(HasFP &&
"Expecting a valid frame pointer.");
1731 if (!isLargeFrame) {
1735 TII.materializeImmPostRA(
MBB,
MBBI, dl, ScratchReg, FrameSize);
1743 BuildMI(
MBB, StackUpdateLoc, dl, AddImmInst, SPReg)
1749 assert(FPOffset <= 0 && BPOffset <= 0 && PBPOffset <= 0 &&
1750 "Local offsets should be negative");
1752 FPOffset += FrameSize;
1753 BPOffset += FrameSize;
1754 PBPOffset += FrameSize;
1772 assert(RBReg != ScratchReg &&
"Should have avoided ScratchReg");
1779 if (MustSaveCR && SingleScratchReg &&
MustSaveLR) {
1782 assert(HasRedZone &&
"Expecting red zone");
1786 for (
unsigned i = 0, e = MustSaveCRs.
size(); i != e; ++i)
1795 bool LoadedLR =
false;
1796 if (
MustSaveLR && RBReg == SPReg && isInt<16>(LROffset+SPAdd)) {
1803 if (MustSaveCR && !(SingleScratchReg &&
MustSaveLR)) {
1804 assert(RBReg == SPReg &&
"Should be using SP as a base register");
1813 if (HasRedZone || RBReg == SPReg)
1835 if (RBReg != SPReg || SPAdd != 0) {
1836 assert(!HasRedZone &&
"This should not happen with red zone");
1847 assert(RBReg != ScratchReg &&
"Should be using FP or SP as base register");
1862 for (
unsigned i = 0, e = MustSaveCRs.
size(); i != e; ++i)
1869 if (HasROPProtect) {
1872 assert((ImmOffset <= -8 && ImmOffset >= -512) &&
1873 "ROP hash check location offset out of range.");
1874 assert(((ImmOffset & 0x7) == 0) &&
1875 "ROP hash check location offset must be 8 byte aligned.");
1886 if (IsReturnBlock) {
1887 unsigned RetOpcode =
MBBI->getOpcode();
1889 (RetOpcode == PPC::BLR || RetOpcode == PPC::BLR8) &&
1894 if (CallerAllocatedAmt && isInt<16>(CallerAllocatedAmt)) {
1899 .
addImm(CallerAllocatedAmt >> 16);
1902 .
addImm(CallerAllocatedAmt & 0xFFFF);
1909 createTailCallBranchInstr(
MBB);
1930 unsigned RetOpcode =
MBBI->getOpcode();
1931 if (RetOpcode == PPC::TCRETURNdi) {
1942 }
else if (RetOpcode == PPC::TCRETURNri) {
1944 assert(
MBBI->getOperand(0).isReg() &&
"Expecting register operand.");
1946 }
else if (RetOpcode == PPC::TCRETURNai) {
1950 }
else if (RetOpcode == PPC::TCRETURNdi8) {
1961 }
else if (RetOpcode == PPC::TCRETURNri8) {
1963 assert(
MBBI->getOperand(0).isReg() &&
"Expecting register operand.");
1965 }
else if (RetOpcode == PPC::TCRETURNai8) {
1981 SavedRegs.
reset(PPC::VSRp26);
1982 SavedRegs.
reset(PPC::VSRp27);
1983 SavedRegs.
reset(PPC::VSRp28);
1984 SavedRegs.
reset(PPC::VSRp29);
1985 SavedRegs.
reset(PPC::VSRp30);
1986 SavedRegs.
reset(PPC::VSRp31);
1990 unsigned LR = RegInfo->getRARegister();
1992 SavedRegs.
reset(LR);
1996 const bool isPPC64 = Subtarget.
isPPC64();
2030 SavedRegs.
reset(isPPC64 ? PPC::X31 : PPC::R31);
2034 SavedRegs.
reset(PPC::R30);
2049 if ((SavedRegs.
test(PPC::CR2) || SavedRegs.
test(PPC::CR3) ||
2050 SavedRegs.
test(PPC::CR4))) {
2052 const int64_t SpillOffset =
2075 createTailCallBranchInstr(
MBB);
2080 if (CSI.empty() && !
needsFP(MF)) {
2085 unsigned MinGPR = PPC::R31;
2086 unsigned MinG8R = PPC::X31;
2087 unsigned MinFPR = PPC::F31;
2088 unsigned MinVR = Subtarget.hasSPE() ? PPC::S31 : PPC::V31;
2090 bool HasGPSaveArea =
false;
2091 bool HasG8SaveArea =
false;
2092 bool HasFPSaveArea =
false;
2093 bool HasVRSaveArea =
false;
2103 (Reg != PPC::X2 && Reg != PPC::R2)) &&
2104 "Not expecting to try to spill R2 in a function that must save TOC");
2105 if (PPC::GPRCRegClass.
contains(Reg)) {
2106 HasGPSaveArea =
true;
2113 }
else if (PPC::G8RCRegClass.
contains(Reg)) {
2114 HasG8SaveArea =
true;
2121 }
else if (PPC::F8RCRegClass.
contains(Reg)) {
2122 HasFPSaveArea =
true;
2129 }
else if (PPC::CRBITRCRegClass.
contains(Reg) ||
2132 }
else if (PPC::VRRCRegClass.
contains(Reg) ||
2133 PPC::SPERCRegClass.
contains(Reg)) {
2136 HasVRSaveArea =
true;
2151 int64_t LowerBound = 0;
2157 LowerBound = TCSPDelta;
2162 if (HasFPSaveArea) {
2163 for (
unsigned i = 0, e = FPRegs.
size(); i != e; ++i) {
2164 int FI = FPRegs[i].getFrameIdx();
2169 LowerBound -= (31 -
TRI->getEncodingValue(MinFPR) + 1) * 8;
2176 assert(FI &&
"No Frame Pointer Save Slot!");
2179 HasGPSaveArea =
true;
2184 assert(FI &&
"No PIC Base Pointer Save Slot!");
2187 MinGPR = std::min<unsigned>(MinGPR, PPC::R30);
2188 HasGPSaveArea =
true;
2194 assert(FI &&
"No Base Pointer Save Slot!");
2198 if (PPC::G8RCRegClass.
contains(BP)) {
2199 MinG8R = std::min<unsigned>(MinG8R, BP);
2200 HasG8SaveArea =
true;
2201 }
else if (PPC::GPRCRegClass.
contains(BP)) {
2202 MinGPR = std::min<unsigned>(MinGPR, BP);
2203 HasGPSaveArea =
true;
2209 if (HasGPSaveArea || HasG8SaveArea) {
2212 for (
unsigned i = 0, e = GPRegs.
size(); i != e; ++i) {
2213 if (!GPRegs[i].isSpilledToReg()) {
2214 int FI = GPRegs[i].getFrameIdx();
2221 for (
unsigned i = 0, e = G8Regs.
size(); i != e; ++i) {
2222 if (!G8Regs[i].isSpilledToReg()) {
2223 int FI = G8Regs[i].getFrameIdx();
2229 std::min<unsigned>(
TRI->getEncodingValue(MinGPR),
2230 TRI->getEncodingValue(MinG8R));
2232 const unsigned GPRegSize = Subtarget.
isPPC64() ? 8 : 4;
2233 LowerBound -= (31 - MinReg + 1) * GPRegSize;
2243 for (
const auto &CSInfo : CSI) {
2244 if (CSInfo.getReg() == PPC::CR2) {
2245 int FI = CSInfo.getFrameIdx();
2256 if (HasVRSaveArea) {
2262 assert(LowerBound <= 0 &&
"Expect LowerBound have a non-positive value!");
2263 LowerBound &= ~(15);
2265 for (
unsigned i = 0, e = VRegs.
size(); i != e; ++i) {
2266 int FI = VRegs[i].getFrameIdx();
2293 bool NeedSpills = Subtarget.hasSPE() ? !isInt<8>(StackSize) : !isInt<16>(StackSize);
2301 unsigned Size =
TRI.getSpillSize(RC);
2302 Align Alignment =
TRI.getSpillAlign(RC);
2323 std::vector<CalleeSavedInfo> &CSI)
const {
2332 if (Subtarget.hasSPE()) {
2336 for (
auto &CalleeSaveReg : CSI) {
2339 MCPhysReg Higher = RegInfo->getSubReg(Reg, 2);
2344 !
MRI.isPhysRegModified(Higher))
2357 for (
unsigned i = 0; CSRegs[i]; ++i)
2358 BVCalleeSaved.
set(CSRegs[i]);
2360 for (
unsigned Reg : BVAllocatable.
set_bits()) {
2363 if (BVCalleeSaved[Reg] || !PPC::VSRCRegClass.
contains(Reg) ||
2364 MRI.isPhysRegUsed(Reg))
2365 BVAllocatable.
reset(Reg);
2368 bool AllSpilledToReg =
true;
2369 unsigned LastVSRUsedForSpill = 0;
2370 for (
auto &CS : CSI) {
2371 if (BVAllocatable.
none())
2376 if (!PPC::G8RCRegClass.
contains(Reg)) {
2377 AllSpilledToReg =
false;
2383 if (LastVSRUsedForSpill != 0) {
2384 CS.setDstReg(LastVSRUsedForSpill);
2385 BVAllocatable.
reset(LastVSRUsedForSpill);
2386 LastVSRUsedForSpill = 0;
2390 unsigned VolatileVFReg = BVAllocatable.
find_first();
2391 if (VolatileVFReg < BVAllocatable.
size()) {
2392 CS.setDstReg(VolatileVFReg);
2393 LastVSRUsedForSpill = VolatileVFReg;
2395 AllSpilledToReg =
false;
2398 return AllSpilledToReg;
2410 bool CRSpilled =
false;
2414 VSRContainingGPRs.clear();
2419 if (
Info.isSpilledToReg()) {
2421 VSRContainingGPRs.FindAndConstruct(
Info.getDstReg()).second;
2422 assert(SpilledVSR.second == 0 &&
2423 "Can't spill more than two GPRs into VSR!");
2424 if (SpilledVSR.first == 0)
2425 SpilledVSR.first =
Info.getReg();
2427 SpilledVSR.second =
Info.getReg();
2435 bool IsCRField = PPC::CR2 <= Reg && Reg <= PPC::CR4;
2443 bool IsLiveIn =
MRI.isLiveIn(Reg);
2447 if (CRSpilled && IsCRField) {
2453 if ((Reg == PPC::X2 || Reg == PPC::R2) && MustSaveTOC)
2478 if (
I.isSpilledToReg()) {
2479 unsigned Dst =
I.getDstReg();
2484 if (VSRContainingGPRs[Dst].second != 0) {
2485 assert(Subtarget.hasP9Vector() &&
2486 "mtvsrdd is unavailable on pre-P9 targets.");
2492 }
else if (VSRContainingGPRs[Dst].second == 0) {
2493 assert(Subtarget.hasP8Vector() &&
2494 "Can't move GPR to VSR on pre-P8 targets.");
2498 TRI->getSubReg(Dst, PPC::sub_64))
2513 TII.storeRegToStackSlotNoUpd(
MBB,
MI, Reg, !IsLiveIn,
2514 I.getFrameIdx(), RC,
TRI);
2524static void restoreCRs(
bool is31,
bool CR2Spilled,
bool CR3Spilled,
2532 unsigned MoveReg = PPC::R12;
2537 CSI[CSIIndex].getFrameIdx()));
2539 unsigned RestoreOp = PPC::MTOCRF;
2558 I->getOpcode() == PPC::ADJCALLSTACKUP) {
2560 if (
int CalleeAmt =
I->getOperand(1).getImm()) {
2563 unsigned StackReg =
is64Bit ? PPC::X1 : PPC::R1;
2564 unsigned TmpReg =
is64Bit ? PPC::X0 : PPC::R0;
2565 unsigned ADDIInstr =
is64Bit ? PPC::ADDI8 : PPC::ADDI;
2566 unsigned ADDInstr =
is64Bit ? PPC::ADD8 : PPC::ADD4;
2567 unsigned LISInstr =
is64Bit ? PPC::LIS8 : PPC::LIS;
2568 unsigned ORIInstr =
is64Bit ? PPC::ORI8 : PPC::ORI;
2571 if (isInt<16>(CalleeAmt)) {
2578 .
addImm(CalleeAmt >> 16);
2581 .
addImm(CalleeAmt & 0xFFFF);
2593 return PPC::CR2 == Reg || Reg == PPC::CR3 || Reg == PPC::CR4;
2603 bool CR2Spilled =
false;
2604 bool CR3Spilled =
false;
2605 bool CR4Spilled =
false;
2606 unsigned CSIIndex = 0;
2617 for (
unsigned i = 0, e = CSI.
size(); i != e; ++i) {
2620 if ((Reg == PPC::X2 || Reg == PPC::R2) && MustSaveTOC)
2628 if (Reg == PPC::CR2) {
2634 }
else if (Reg == PPC::CR3) {
2637 }
else if (Reg == PPC::CR4) {
2643 if (CR2Spilled || CR3Spilled || CR4Spilled) {
2645 restoreCRs(is31, CR2Spilled, CR3Spilled, CR4Spilled,
MBB,
I, CSI,
2647 CR2Spilled = CR3Spilled = CR4Spilled =
false;
2650 if (CSI[i].isSpilledToReg()) {
2652 unsigned Dst = CSI[i].getDstReg();
2657 if (VSRContainingGPRs[Dst].second != 0) {
2658 assert(Subtarget.hasP9Vector());
2659 NumPEReloadVSR += 2;
2661 VSRContainingGPRs[Dst].second)
2664 VSRContainingGPRs[Dst].first)
2666 }
else if (VSRContainingGPRs[Dst].second == 0) {
2667 assert(Subtarget.hasP8Vector());
2670 VSRContainingGPRs[Dst].first)
2686 TII.loadRegFromStackSlotNoUpd(
MBB,
I, Reg, CSI[i].getFrameIdx(), RC,
2693 "loadRegFromStackSlot didn't insert any code!");
2707 if (CR2Spilled || CR3Spilled || CR4Spilled) {
2709 "Only set CR[2|3|4]Spilled on 32-bit SVR4.");
2711 restoreCRs(is31, CR2Spilled, CR3Spilled, CR4Spilled,
MBB,
I, CSI, CSIIndex);
2718 return TOCSaveOffset;
2722 return FramePointerSaveOffset;
2726 return BasePointerSaveOffset;
unsigned const MachineRegisterInfo * MRI
MachineBasicBlock MachineBasicBlock::iterator DebugLoc DL
MachineBasicBlock MachineBasicBlock::iterator MBBI
Analysis containing CSE Info
const HexagonInstrInfo * TII
This file implements the LivePhysRegs utility for tracking liveness of physical registers.
unsigned const TargetRegisterInfo * TRI
static bool hasSpills(const MachineFunction &MF)
static unsigned computeCRSaveOffset(const PPCSubtarget &STI)
static void restoreCRs(bool is31, bool CR2Spilled, bool CR3Spilled, bool CR4Spilled, MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, ArrayRef< CalleeSavedInfo > CSI, unsigned CSIIndex)
static unsigned computeReturnSaveOffset(const PPCSubtarget &STI)
static bool MustSaveLR(const MachineFunction &MF, unsigned LR)
MustSaveLR - Return true if this function requires that we save the LR register onto the stack in the...
#define CALLEE_SAVED_FPRS
static cl::opt< bool > EnablePEVectorSpills("ppc-enable-pe-vector-spills", cl::desc("Enable spills in prologue to vector registers."), cl::init(false), cl::Hidden)
#define CALLEE_SAVED_GPRS32
#define CALLEE_SAVED_GPRS64
static unsigned computeLinkageSize(const PPCSubtarget &STI)
static unsigned computeFramePointerSaveOffset(const PPCSubtarget &STI)
static bool isCalleeSavedCR(unsigned Reg)
static unsigned computeTOCSaveOffset(const PPCSubtarget &STI)
static bool hasNonRISpills(const MachineFunction &MF)
static bool spillsCR(const MachineFunction &MF)
static unsigned computeBasePointerSaveOffset(const PPCSubtarget &STI)
This file declares the machine register scavenger class.
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
This file defines the 'Statistic' class, which is designed to be an easy way to expose various metric...
#define STATISTIC(VARNAME, DESC)
static void buildDefCFAReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, const DebugLoc &DL, unsigned Reg, const SystemZInstrInfo *ZII)
static bool contains(SmallPtrSetImpl< ConstantExpr * > &Cache, ConstantExpr *Expr, Constant *C)
static bool is64Bit(const char *name)
ArrayRef - Represent a constant reference to an array (0 or more elements consecutively in memory),...
size_t size() const
size - Get the array size.
LLVM Basic Block Representation.
bool test(unsigned Idx) const
int find_first() const
find_first - Returns the index of the first set bit, -1 if none of the bits are set.
size_type count() const
count - Returns the number of bits which are set.
int find_next(unsigned Prev) const
find_next - Returns the index of the next set bit following the "Prev" bit.
bool none() const
none - Returns true if none of the bits are set.
iterator_range< const_set_bits_iterator > set_bits() const
size_type size() const
size - Returns the number of bits in this bitvector.
The CalleeSavedInfo class tracks the information need to locate where a callee saved register is in t...
CallingConv::ID getCallingConv() const
getCallingConv()/setCallingConv(CC) - These method get and set the calling convention of this functio...
bool hasFnAttribute(Attribute::AttrKind Kind) const
Return true if the function has the attribute.
void storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, Register SrcReg, bool isKill, int FrameIndex, const TargetRegisterClass *RC, const TargetRegisterInfo *TRI, Register VReg) const override
Store the specified register of the given register class to the specified stack frame index.
void loadRegFromStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, Register DestReg, int FrameIndex, const TargetRegisterClass *RC, const TargetRegisterInfo *TRI, Register VReg) const override
Load the specified register of the given register class from the specified stack frame index.
An instruction for reading from memory.
static MCCFIInstruction createDefCfaRegister(MCSymbol *L, unsigned Register, SMLoc Loc={})
.cfi_def_cfa_register modifies a rule for computing CFA.
static MCCFIInstruction createOffset(MCSymbol *L, unsigned Register, int Offset, SMLoc Loc={})
.cfi_offset Previous value of Register is saved at offset Offset from CFA.
static MCCFIInstruction cfiDefCfaOffset(MCSymbol *L, int Offset, SMLoc Loc={})
.cfi_def_cfa_offset modifies a rule for computing CFA.
static MCCFIInstruction createRegister(MCSymbol *L, unsigned Register1, unsigned Register2, SMLoc Loc={})
.cfi_register Previous value of Register1 is saved in register Register2.
static MCCFIInstruction cfiDefCfa(MCSymbol *L, unsigned Register, int Offset, SMLoc Loc={})
.cfi_def_cfa defines a rule for computing CFA as: take address from Register and add Offset to it.
const MCRegisterInfo * getRegisterInfo() const
Describe properties that are true of each instruction in the target description file.
MCRegisterInfo base class - We assume that the target defines a static array of MCRegisterDesc object...
void transferSuccessorsAndUpdatePHIs(MachineBasicBlock *FromMBB)
Transfers all the successors, as in transferSuccessors, and update PHI operands in the successor bloc...
instr_iterator insert(instr_iterator I, MachineInstr *M)
Insert MI into the instruction list before I, possibly inside a bundle.
const BasicBlock * getBasicBlock() const
Return the LLVM basic block that this instance corresponded to originally.
iterator getFirstTerminator()
Returns an iterator to the first terminator instruction of this basic block.
bool isReturnBlock() const
Convenience function that returns true if the block ends in a return instruction.
void addSuccessor(MachineBasicBlock *Succ, BranchProbability Prob=BranchProbability::getUnknown())
Add Succ as a successor of this MachineBasicBlock.
DebugLoc findDebugLoc(instr_iterator MBBI)
Find the next valid DebugLoc starting at MBBI, skipping any debug instructions.
iterator getLastNonDebugInstr(bool SkipPseudoOp=true)
Returns an iterator to the last non-debug instruction in the basic block, or end().
void addLiveIn(MCRegister PhysReg, LaneBitmask LaneMask=LaneBitmask::getAll())
Adds the specified register as a live in.
const MachineFunction * getParent() const
Return the MachineFunction containing this basic block.
instr_iterator erase(instr_iterator I)
Remove an instruction from the instruction list and delete it.
void splice(iterator Where, MachineBasicBlock *Other, iterator From)
Take an instruction from MBB 'Other' at the position From, and insert it into this MBB right before '...
The MachineFrameInfo class represents an abstract stack frame until prolog/epilog code is inserted.
int CreateFixedObject(uint64_t Size, int64_t SPOffset, bool IsImmutable, bool isAliased=false)
Create a new object at a fixed location on the stack.
bool hasVarSizedObjects() const
This method may be called any time after instruction selection is complete to determine if the stack ...
uint64_t getStackSize() const
Return the number of bytes that must be allocated to hold all of the fixed size frame objects.
bool adjustsStack() const
Return true if this function adjusts the stack – e.g., when calling another function.
int CreateStackObject(uint64_t Size, Align Alignment, bool isSpillSlot, const AllocaInst *Alloca=nullptr, uint8_t ID=0)
Create a new statically sized stack object, returning a nonnegative identifier to represent it.
bool hasCalls() const
Return true if the current function has any function calls.
bool isFrameAddressTaken() const
This method may be called any time after instruction selection is complete to determine if there is a...
Align getMaxAlign() const
Return the alignment in bytes that this function must be aligned to, which is greater than the defaul...
void setObjectOffset(int ObjectIdx, int64_t SPOffset)
Set the stack frame offset of the specified object.
bool hasPatchPoint() const
This method may be called any time after instruction selection is complete to determine if there is a...
MachineBasicBlock * getRestorePoint() const
uint64_t estimateStackSize(const MachineFunction &MF) const
Estimate and return the size of the stack frame.
bool hasTailCall() const
Returns true if the function contains a tail call.
bool hasStackMap() const
This method may be called any time after instruction selection is complete to determine if there is a...
const std::vector< CalleeSavedInfo > & getCalleeSavedInfo() const
Returns a reference to call saved info vector for the current function.
unsigned getMaxCallFrameSize() const
Return the maximum size of a call frame that must be allocated for an outgoing function call.
void setMaxCallFrameSize(unsigned S)
int64_t getObjectOffset(int ObjectIdx) const
Return the assigned stack offset of the specified object from the incoming stack pointer.
void setStackSize(uint64_t Size)
Set the size of the stack.
bool isFixedObjectIndex(int ObjectIdx) const
Returns true if the specified index corresponds to a fixed stack object.
MachineBasicBlock * getSavePoint() const
unsigned addFrameInst(const MCCFIInstruction &Inst)
const TargetSubtargetInfo & getSubtarget() const
getSubtarget - Return the subtarget for which this machine code is being compiled.
bool exposesReturnsTwice() const
exposesReturnsTwice - Returns true if the function calls setjmp or any other similar functions with a...
bool needsFrameMoves() const
True if this function needs frame moves for debug or exceptions.
MachineFrameInfo & getFrameInfo()
getFrameInfo - Return the frame info object for the current function.
MachineRegisterInfo & getRegInfo()
getRegInfo - Return information about the registers currently in use.
Function & getFunction()
Return the LLVM function that this machine code represents.
const LLVMTargetMachine & getTarget() const
getTarget - Return the target machine this machine code is compiled with
MachineModuleInfo & getMMI() const
Ty * getInfo()
getInfo - Keep track of various per-function pieces of information for backends that would like to do...
const MachineBasicBlock & front() const
MachineBasicBlock * CreateMachineBasicBlock(const BasicBlock *BB=nullptr, std::optional< UniqueBBID > BBID=std::nullopt)
CreateMachineBasicBlock - Allocate a new MachineBasicBlock.
void insert(iterator MBBI, MachineBasicBlock *MBB)
const MachineInstrBuilder & addCFIIndex(unsigned CFIIndex) const
const MachineInstrBuilder & addImm(int64_t Val) const
Add a new immediate operand.
const MachineInstrBuilder & addReg(Register RegNo, unsigned flags=0, unsigned SubReg=0) const
Add a new virtual register operand.
const MachineInstrBuilder & addMBB(MachineBasicBlock *MBB, unsigned TargetFlags=0) const
const MachineInstrBuilder & addDef(Register RegNo, unsigned Flags=0, unsigned SubReg=0) const
Add a virtual register definition operand.
Representation of each machine instruction.
This class contains meta information specific to a module.
const MCContext & getContext() const
MachineOperand class - Representation of each machine instruction operand.
const GlobalValue * getGlobal() const
bool isImm() const
isImm - Tests if this is a MO_Immediate operand.
bool isSymbol() const
isSymbol - Tests if this is a MO_ExternalSymbol operand.
bool isGlobal() const
isGlobal - Tests if this is a MO_GlobalAddress operand.
const char * getSymbolName() const
int64_t getOffset() const
Return the offset from the symbol in this operand.
reg_begin/reg_end - Provide iteration support to walk over all definitions and uses of a register wit...
MachineRegisterInfo - Keep track of information for virtual and physical registers,...
def_iterator def_begin(Register RegNo) const
static def_iterator def_end()
MutableArrayRef - Represent a mutable reference to an array (0 or more elements consecutively in memo...
uint64_t getReturnSaveOffset() const
getReturnSaveOffset - Return the previous frame offset to save the return address.
bool needsFP(const MachineFunction &MF) const
void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override
bool hasFP(const MachineFunction &MF) const override
hasFP - Return true if the specified function should have a dedicated frame pointer register.
bool canUseAsEpilogue(const MachineBasicBlock &MBB) const override
Check whether or not the given MBB can be used as a epilogue for the target.
uint64_t getStackThreshold() const override
getStackThreshold - Return the maximum stack size
void processFunctionBeforeFrameFinalized(MachineFunction &MF, RegScavenger *RS=nullptr) const override
processFunctionBeforeFrameFinalized - This method is called immediately before the specified function...
uint64_t getFramePointerSaveOffset() const
getFramePointerSaveOffset - Return the previous frame offset to save the frame pointer.
bool spillCalleeSavedRegisters(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, ArrayRef< CalleeSavedInfo > CSI, const TargetRegisterInfo *TRI) const override
spillCalleeSavedRegisters - Issues instruction(s) to spill all callee saved registers and returns tru...
unsigned getLinkageSize() const
getLinkageSize - Return the size of the PowerPC ABI linkage area.
MachineBasicBlock::iterator eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB, MachineBasicBlock::iterator I) const override
This method is called during prolog/epilog code insertion to eliminate call frame setup and destroy p...
const SpillSlot * getCalleeSavedSpillSlots(unsigned &NumEntries) const override
getCalleeSavedSpillSlots - This method returns a pointer to an array of pairs, that contains an entry...
void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs, RegScavenger *RS=nullptr) const override
This method determines which of the registers reported by TargetRegisterInfo::getCalleeSavedRegs() sh...
bool canUseAsPrologue(const MachineBasicBlock &MBB) const override
Methods used by shrink wrapping to determine if MBB can be used for the function prologue/epilogue.
void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override
emitProlog/emitEpilog - These methods insert prolog and epilog code into the function.
bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, MutableArrayRef< CalleeSavedInfo > CSI, const TargetRegisterInfo *TRI) const override
restoreCalleeSavedRegisters - Issues instruction(s) to restore all callee saved registers and returns...
void replaceFPWithRealFP(MachineFunction &MF) const
bool enableShrinkWrapping(const MachineFunction &MF) const override
Returns true if the target will correctly handle shrink wrapping.
uint64_t determineFrameLayout(const MachineFunction &MF, bool UseEstimate=false, unsigned *NewMaxCallFrameSize=nullptr) const
Determine the frame layout but do not update the machine function.
void addScavengingSpillSlot(MachineFunction &MF, RegScavenger *RS) const
PPCFrameLowering(const PPCSubtarget &STI)
bool assignCalleeSavedSpillSlots(MachineFunction &MF, const TargetRegisterInfo *TRI, std::vector< CalleeSavedInfo > &CSI) const override
This function will assign callee saved gprs to volatile vector registers for prologue spills when app...
uint64_t determineFrameLayoutAndUpdate(MachineFunction &MF, bool UseEstimate=false) const
Determine the frame layout and update the machine function.
void inlineStackProbe(MachineFunction &MF, MachineBasicBlock &PrologMBB) const override
Replace a StackProbe stub (if any) with the actual probe code inline.
uint64_t getTOCSaveOffset() const
getTOCSaveOffset - Return the previous frame offset to save the TOC register – 64-bit SVR4 ABI only.
uint64_t getBasePointerSaveOffset() const
getBasePointerSaveOffset - Return the previous frame offset to save the base pointer.
PPCFunctionInfo - This class is derived from MachineFunction private PowerPC target-specific informat...
int getTailCallSPDelta() const
const SmallVectorImpl< Register > & getMustSaveCRs() const
int getPICBasePointerSaveIndex() const
bool shrinkWrapDisabled() const
int getFramePointerSaveIndex() const
void addMustSaveCR(Register Reg)
void setBasePointerSaveIndex(int Idx)
bool hasNonRISpills() const
bool isLRStoreRequired() const
void setPICBasePointerSaveIndex(int Idx)
int getROPProtectionHashSaveIndex() const
unsigned getMinReservedArea() const
void setMustSaveLR(bool U)
MustSaveLR - This is set when the prolog/epilog inserter does its initial scan of the function.
void setCRSpillFrameIndex(int idx)
int getBasePointerSaveIndex() const
void setFramePointerSaveIndex(int Idx)
bool hasBasePointer(const MachineFunction &MF) const
Register getBaseRegister(const MachineFunction &MF) const
bool requiresFrameIndexScavenging(const MachineFunction &MF) const override
const MCPhysReg * getCalleeSavedRegs(const MachineFunction *MF) const override
Code Generation virtual methods...
bool is32BitELFABI() const
bool needsSwapsForVSXMemOps() const
bool isPPC64() const
isPPC64 - Return true if we are generating code for 64-bit pointer mode.
const PPCTargetLowering * getTargetLowering() const override
const PPCInstrInfo * getInstrInfo() const override
unsigned getRedZoneSize() const
bool is64BitELFABI() const
const PPCTargetMachine & getTargetMachine() const
const PPCRegisterInfo * getRegisterInfo() const override
bool hasInlineStackProbe(const MachineFunction &MF) const override
unsigned getStackProbeSize(const MachineFunction &MF) const
void enterBasicBlockEnd(MachineBasicBlock &MBB)
Start tracking liveness from the end of basic block MBB.
bool isRegUsed(Register Reg, bool includeReserved=true) const
Return if a specific register is currently used.
void backward()
Update internal register state and move MBB iterator backwards.
void enterBasicBlock(MachineBasicBlock &MBB)
Start tracking liveness from the begin of basic block MBB.
void addScavengingFrameIndex(int FI)
Add a scavenging frame index.
BitVector getRegsAvailable(const TargetRegisterClass *RC)
Return all available registers in the register class in Mask.
Wrapper class representing virtual and physical registers.
This class consists of common code factored out of the SmallVector class to reduce code duplication b...
void push_back(const T &Elt)
This is a 'vector' (really, a variable-sized array), optimized for the case when the array is small.
An instruction for storing to memory.
Information about stack frame layout on the target.
virtual void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs, RegScavenger *RS=nullptr) const
This method determines which of the registers reported by TargetRegisterInfo::getCalleeSavedRegs() sh...
virtual uint64_t getStackThreshold() const
getStackThreshold - Return the maximum stack size
Align getStackAlign() const
getStackAlignment - This method returns the number of bytes to which the stack pointer must be aligne...
TargetInstrInfo - Interface to description of machine instruction set.
bool isPositionIndependent() const
bool DisableFramePointerElim(const MachineFunction &MF) const
DisableFramePointerElim - This returns true if frame pointer elimination optimization should be disab...
unsigned GuaranteedTailCallOpt
GuaranteedTailCallOpt - This flag is enabled when -tailcallopt is specified on the commandline.
TargetRegisterInfo base class - We assume that the target defines a static array of TargetRegisterDes...
self_iterator getIterator()
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
@ Fast
Attempts to make calls as fast as possible (e.g.
@ Kill
The last use of a register.
initializer< Ty > init(const Ty &Val)
This is an optimization pass for GlobalISel generic memory operations.
MachineInstrBuilder BuildMI(MachineFunction &MF, const MIMetadata &MIMD, const MCInstrDesc &MCID)
Builder interface. Specify how to create the initial instruction itself.
static const MachineInstrBuilder & addFrameReference(const MachineInstrBuilder &MIB, int FI, int Offset=0, bool mem=true)
addFrameReference - This function is used to add a reference to the base of an abstract object on the...
constexpr bool isPowerOf2_64(uint64_t Value)
Return true if the argument is a power of two > 0 (64 bit edition.)
unsigned getKillRegState(bool B)
uint64_t alignTo(uint64_t Size, Align A)
Returns a multiple of A needed to store Size bytes.
auto find_if(R &&Range, UnaryPredicate P)
Provide wrappers to std::find_if which take ranges instead of having to pass begin/end explicitly.
unsigned Log2(Align A)
Returns the log2 of the alignment.
static bool recomputeLiveIns(MachineBasicBlock &MBB)
Convenience function for recomputing live-in's for a MBB.
This struct is a compact representation of a valid (non-zero power of two) alignment.