static bool needsFP(const MachineFunction &MF) {
const MachineFrameInfo *MFI = MF.getFrameInfo();
return NoFramePointerElim || MFI->hasVarSizedObjects() ||
- (
PerformTailCallOpt && MF.getInfo<PPCFunctionInfo>()->hasFastCall());
+ (
GuaranteedTailCallOpt && MF.getInfo<PPCFunctionInfo>()->hasFastCall());
}
static bool spillsCR(const MachineFunction &MF) {
Reserved.set(PPC::R2); // System-reserved register
Reserved.set(PPC::R13); // Small Data Area pointer register
}
+ // Reserve R2 on Darwin to hack around the problem of save/restore of CR
+ // when the stack frame is too big to address directly; we need two regs.
+ // This is a hack.
+ if (Subtarget.isDarwinABI()) {
+ Reserved.set(PPC::R2);
+ }
// On PPC64, r13 is the thread pointer. Never allocate this register.
// Note that this is over conservative, as it also prevents allocation of R31
if (Subtarget.isSVR4ABI()) {
Reserved.set(PPC::X2);
}
+ // Reserve R2 on Darwin to hack around the problem of save/restore of CR
+ // when the stack frame is too big to address directly; we need two regs.
+ // This is a hack.
+ if (Subtarget.isDarwinABI()) {
+ Reserved.set(PPC::X2);
+ }
}
if (needsFP(MF))
void PPCRegisterInfo::
eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
MachineBasicBlock::iterator I) const {
- if (PerformTailCallOpt && I->getOpcode() == PPC::ADJCALLSTACKUP) {
+ if (GuaranteedTailCallOpt && I->getOpcode() == PPC::ADJCALLSTACKUP) {
// Add (actually subtract) back the amount the callee popped on return.
if (int CalleeAmt = I->getOperand(1).getImm()) {
bool is64Bit = Subtarget.isPPC64();
MachineInstr *MI = I;
DebugLoc dl = MI->getDebugLoc();
- if (isInt16(CalleeAmt)) {
+ if (isInt<16>(CalleeAmt)) {
BuildMI(MBB, I, dl, TII.get(ADDIInstr), StackReg).addReg(StackReg).
addImm(CalleeAmt);
} else {
unsigned findScratchRegister(MachineBasicBlock::iterator II, RegScavenger *RS,
const TargetRegisterClass *RC, int SPAdj) {
assert(RS && "Register scavenging must be on");
- unsigned Reg = RS->FindUnusedReg(RC, true);
+ unsigned Reg = RS->FindUnusedReg(RC);
// FIXME: move ARM callee-saved reg scan to target independent code, then
// search for already spilled CS register here.
if (Reg == 0)
else
Reg = PPC::R0;
- if (MaxAlign < TargetAlign && isInt16(FrameSize)) {
+ if (MaxAlign < TargetAlign && isInt<16>(FrameSize)) {
BuildMI(MBB, II, dl, TII.get(PPC::ADDI), Reg)
.addReg(PPC::R31)
.addImm(FrameSize);
MBB.erase(II);
}
-void PPCRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
- int SPAdj, RegScavenger *RS) const {
+unsigned
+PPCRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
+ int SPAdj, FrameIndexValue *Value,
+ RegScavenger *RS) const {
assert(SPAdj == 0 && "Unexpected");
// Get the instruction.
}
// Take into account whether it's an add or mem instruction
unsigned OffsetOperandNo = (FIOperandNo == 2) ? 1 : 2;
- if (MI.getOpcode() == TargetInstrInfo::INLINEASM)
+ if (MI.isInlineAsm())
OffsetOperandNo = FIOperandNo-1;
// Get the frame index.
if (FPSI && FrameIndex == FPSI &&
(OpC == PPC::DYNALLOC || OpC == PPC::DYNALLOC8)) {
lowerDynamicAlloc(II, SPAdj, RS);
- return;
+ return 0;
}
// Special case for pseudo-op SPILL_CR.
if (EnableRegisterScavenging) // FIXME (64-bit): Enable by default.
if (OpC == PPC::SPILL_CR) {
lowerCRSpilling(II, FrameIndex, SPAdj, RS);
- return;
+ return 0;
}
// Replace the FrameIndex with base register with GPR1 (SP) or GPR31 (FP).
// clear can be encoded. This is extremely uncommon, because normally you
// only "std" to a stack slot that is at least 4-byte aligned, but it can
// happen in invalid code.
- if (isInt16(Offset) && (!isIXAddr || (Offset & 3) == 0)) {
+ if (isInt<16>(Offset) && (!isIXAddr || (Offset & 3) == 0)) {
if (isIXAddr)
Offset >>= 2; // The actual encoded value has the low two bits zero.
MI.getOperand(OffsetOperandNo).ChangeToImmediate(Offset);
- return;
+ return 0;
}
// The offset doesn't fit into a single register, scavenge one to build the
// addi 0:rA 1:rB, 2, imm ==> add 0:rA, 1:rB, 2:r0
unsigned OperandBase;
- if (OpC != TargetInstrInfo::INLINEASM) {
+ if (OpC != TargetOpcode::INLINEASM) {
assert(ImmToIdxMap.count(OpC) &&
"No indexed form of load or store available!");
unsigned NewOpcode = ImmToIdxMap.find(OpC)->second;
unsigned StackReg = MI.getOperand(FIOperandNo).getReg();
MI.getOperand(OperandBase).ChangeToRegister(StackReg, false);
MI.getOperand(OperandBase + 1).ChangeToRegister(SReg, false);
+ return 0;
}
/// VRRegNo - Map from a numbered VR register to its enum value.
// Save R31 if necessary
int FPSI = FI->getFramePointerSaveIndex();
- bool IsPPC64 = Subtarget.isPPC64();
- bool IsSVR4ABI = Subtarget.isSVR4ABI();
+ bool isPPC64 = Subtarget.isPPC64();
bool isDarwinABI = Subtarget.isDarwinABI();
MachineFrameInfo *MFI = MF.getFrameInfo();
// If the frame pointer save index hasn't been defined yet.
- if (!FPSI && needsFP(MF) && IsSVR4ABI) {
+ if (!FPSI && needsFP(MF)) {
// Find out what the fix offset of the frame pointer save area.
- int FPOffset = PPCFrameInfo::getFramePointerSaveOffset(IsPPC64,
+ int FPOffset = PPCFrameInfo::getFramePointerSaveOffset(isPPC64,
isDarwinABI);
// Allocate the frame index for frame pointer save area.
- FPSI = MF.getFrameInfo()->CreateFixedObject(IsPPC64? 8 : 4, FPOffset);
+ FPSI = MF.getFrameInfo()->CreateFixedObject(isPPC64? 8 : 4, FPOffset,
+ true, false);
// Save the result.
FI->setFramePointerSaveIndex(FPSI);
}
// Reserve stack space to move the linkage area to in case of a tail call.
int TCSPDelta = 0;
- if (PerformTailCallOpt && (TCSPDelta = FI->getTailCallSPDelta()) < 0) {
- MF.getFrameInfo()->CreateFixedObject(-1 * TCSPDelta, TCSPDelta);
+ if (GuaranteedTailCallOpt && (TCSPDelta = FI->getTailCallSPDelta()) < 0) {
+ MF.getFrameInfo()->CreateFixedObject(-1 * TCSPDelta, TCSPDelta,
+ true, false);
}
// Reserve a slot closest to SP or frame pointer if we have a dynalloc or
if (needsFP(MF) || spillsCR(MF)) {
const TargetRegisterClass *GPRC = &PPC::GPRCRegClass;
const TargetRegisterClass *G8RC = &PPC::G8RCRegClass;
- const TargetRegisterClass *RC = IsPPC64 ? G8RC : GPRC;
+ const TargetRegisterClass *RC = isPPC64 ? G8RC : GPRC;
RS->setScavengingFrameIndex(MFI->CreateStackObject(RC->getSize(),
- RC->getAlignment()));
+ RC->getAlignment(),
+ false));
}
}
// Take into account stack space reserved for tail calls.
int TCSPDelta = 0;
- if (PerformTailCallOpt && (TCSPDelta = PFI->getTailCallSPDelta()) < 0) {
+ if (GuaranteedTailCallOpt && (TCSPDelta = PFI->getTailCallSPDelta()) < 0) {
LowerBound = TCSPDelta;
}
MachineBasicBlock::iterator MBBI = MBB.begin();
MachineFrameInfo *MFI = MF.getFrameInfo();
MachineModuleInfo *MMI = MFI->getMachineModuleInfo();
- DebugLoc dl = DebugLoc::getUnknownLoc();
+ DebugLoc dl;
bool needsFrameMoves = (MMI && MMI->hasDebugInfo()) ||
!MF.getFunction()->doesNotThrow() ||
UnwindTablesMandatory;
// Prepare for frame info.
- unsigned FrameLabelId = 0;
+ MCSymbol *FrameLabel = 0;
// Scan the prolog, looking for an UPDATE_VRSAVE instruction. If we find it,
// process it.
int NegFrameSize = -FrameSize;
// Get processor type.
- bool IsPPC64 = Subtarget.isPPC64();
+ bool isPPC64 = Subtarget.isPPC64();
// Get operating system
bool isDarwinABI = Subtarget.isDarwinABI();
// Check if the link register (LR) must be saved.
// Do we have a frame pointer for this function?
bool HasFP = hasFP(MF) && FrameSize;
- int LROffset = PPCFrameInfo::getReturnSaveOffset(IsPPC64, isDarwinABI);
+ int LROffset = PPCFrameInfo::getReturnSaveOffset(isPPC64, isDarwinABI);
int FPOffset = 0;
if (HasFP) {
assert(FPIndex && "No Frame Pointer Save Slot!");
FPOffset = FFI->getObjectOffset(FPIndex);
} else {
- FPOffset = PPCFrameInfo::getFramePointerSaveOffset(IsPPC64, isDarwinABI);
+ FPOffset = PPCFrameInfo::getFramePointerSaveOffset(isPPC64, isDarwinABI);
}
}
- if (IsPPC64) {
+ if (isPPC64) {
if (MustSaveLR)
BuildMI(MBB, MBBI, dl, TII.get(PPC::MFLR8), PPC::X0);
unsigned TargetAlign = MF.getTarget().getFrameInfo()->getStackAlignment();
unsigned MaxAlign = MFI->getMaxAlignment();
- if (needsFrameMoves) {
- // Mark effective beginning of when frame pointer becomes valid.
- FrameLabelId = MMI->NextLabelID();
- BuildMI(MBB, MBBI, dl, TII.get(PPC::DBG_LABEL)).addImm(FrameLabelId);
- }
-
// Adjust stack pointer: r1 += NegFrameSize.
// If there is a preferred stack alignment, align R1 now
- if (!IsPPC64) {
+ if (!isPPC64) {
// PPC32.
if (ALIGN_STACK && MaxAlign > TargetAlign) {
- assert(isPowerOf2_32(MaxAlign)&&isInt16(MaxAlign)&&"Invalid alignment!");
- assert(isInt16(NegFrameSize) && "Unhandled stack size and alignment!");
+ assert(isPowerOf2_32(MaxAlign) && isInt<16>(MaxAlign) &&
+ "Invalid alignment!");
+ assert(isInt<16>(NegFrameSize) && "Unhandled stack size and alignment!");
BuildMI(MBB, MBBI, dl, TII.get(PPC::RLWINM), PPC::R0)
.addReg(PPC::R1)
.addReg(PPC::R1)
.addReg(PPC::R1)
.addReg(PPC::R0);
- } else if (isInt16(NegFrameSize)) {
+ } else if (isInt<16>(NegFrameSize)) {
BuildMI(MBB, MBBI, dl, TII.get(PPC::STWU), PPC::R1)
.addReg(PPC::R1)
.addImm(NegFrameSize)
}
} else { // PPC64.
if (ALIGN_STACK && MaxAlign > TargetAlign) {
- assert(isPowerOf2_32(MaxAlign)&&isInt16(MaxAlign)&&"Invalid alignment!");
- assert(isInt16(NegFrameSize) && "Unhandled stack size and alignment!");
+ assert(isPowerOf2_32(MaxAlign) && isInt<16>(MaxAlign) &&
+ "Invalid alignment!");
+ assert(isInt<16>(NegFrameSize) && "Unhandled stack size and alignment!");
BuildMI(MBB, MBBI, dl, TII.get(PPC::RLDICL), PPC::X0)
.addReg(PPC::X1)
.addReg(PPC::X1)
.addReg(PPC::X1)
.addReg(PPC::X0);
- } else if (isInt16(NegFrameSize)) {
+ } else if (isInt<16>(NegFrameSize)) {
BuildMI(MBB, MBBI, dl, TII.get(PPC::STDU), PPC::X1)
.addReg(PPC::X1)
.addImm(NegFrameSize / 4)
.addReg(PPC::X0);
}
}
+
+ std::vector<MachineMove> &Moves = MMI->getFrameMoves();
+ // Add the "machine moves" for the instructions we generated above, but in
+ // reverse order.
if (needsFrameMoves) {
- std::vector<MachineMove> &Moves = MMI->getFrameMoves();
-
+ // Mark effective beginning of when frame pointer becomes valid.
+ FrameLabel = MMI->getContext().CreateTempSymbol();
+ BuildMI(MBB, MBBI, dl, TII.get(PPC::DBG_LABEL)).addSym(FrameLabel);
+
+ // Show update of SP.
if (NegFrameSize) {
- // Show update of SP.
MachineLocation SPDst(MachineLocation::VirtualFP);
MachineLocation SPSrc(MachineLocation::VirtualFP, NegFrameSize);
- Moves.push_back(MachineMove(FrameLabelId, SPDst, SPSrc));
+ Moves.push_back(MachineMove(FrameLabel, SPDst, SPSrc));
} else {
- MachineLocation SP(IsPPC64 ? PPC::X31 : PPC::R31);
- Moves.push_back(MachineMove(FrameLabelId, SP, SP));
+ MachineLocation SP(isPPC64 ? PPC::X31 : PPC::R31);
+ Moves.push_back(MachineMove(FrameLabel, SP, SP));
}
if (HasFP) {
MachineLocation FPDst(MachineLocation::VirtualFP, FPOffset);
- MachineLocation FPSrc(IsPPC64 ? PPC::X31 : PPC::R31);
- Moves.push_back(MachineMove(FrameLabelId, FPDst, FPSrc));
+ MachineLocation FPSrc(isPPC64 ? PPC::X31 : PPC::R31);
+ Moves.push_back(MachineMove(FrameLabel, FPDst, FPSrc));
}
- // Add callee saved registers to move list.
- const std::vector<CalleeSavedInfo> &CSI = MFI->getCalleeSavedInfo();
- for (unsigned I = 0, E = CSI.size(); I != E; ++I) {
- int Offset = MFI->getObjectOffset(CSI[I].getFrameIdx());
- unsigned Reg = CSI[I].getReg();
- if (Reg == PPC::LR || Reg == PPC::LR8 || Reg == PPC::RM) continue;
- MachineLocation CSDst(MachineLocation::VirtualFP, Offset);
- MachineLocation CSSrc(Reg);
- Moves.push_back(MachineMove(FrameLabelId, CSDst, CSSrc));
+ if (MustSaveLR) {
+ MachineLocation LRDst(MachineLocation::VirtualFP, LROffset);
+ MachineLocation LRSrc(isPPC64 ? PPC::LR8 : PPC::LR);
+ Moves.push_back(MachineMove(FrameLabel, LRDst, LRSrc));
}
-
- MachineLocation LRDst(MachineLocation::VirtualFP, LROffset);
- MachineLocation LRSrc(IsPPC64 ? PPC::LR8 : PPC::LR);
- Moves.push_back(MachineMove(FrameLabelId, LRDst, LRSrc));
-
- // Mark effective beginning of when frame pointer is ready.
- unsigned ReadyLabelId = MMI->NextLabelID();
- BuildMI(MBB, MBBI, dl, TII.get(PPC::DBG_LABEL)).addImm(ReadyLabelId);
-
- MachineLocation FPDst(HasFP ? (IsPPC64 ? PPC::X31 : PPC::R31) :
- (IsPPC64 ? PPC::X1 : PPC::R1));
- MachineLocation FPSrc(MachineLocation::VirtualFP);
- Moves.push_back(MachineMove(ReadyLabelId, FPDst, FPSrc));
}
+ MCSymbol *ReadyLabel = 0;
+
// If there is a frame pointer, copy R1 into R31
if (HasFP) {
- if (!IsPPC64) {
+ if (!isPPC64) {
BuildMI(MBB, MBBI, dl, TII.get(PPC::OR), PPC::R31)
.addReg(PPC::R1)
.addReg(PPC::R1);
.addReg(PPC::X1)
.addReg(PPC::X1);
}
+
+ if (needsFrameMoves) {
+ ReadyLabel = MMI->getContext().CreateTempSymbol();
+
+ // Mark effective beginning of when frame pointer is ready.
+ BuildMI(MBB, MBBI, dl, TII.get(PPC::DBG_LABEL)).addSym(ReadyLabel);
+
+ MachineLocation FPDst(HasFP ? (isPPC64 ? PPC::X31 : PPC::R31) :
+ (isPPC64 ? PPC::X1 : PPC::R1));
+ MachineLocation FPSrc(MachineLocation::VirtualFP);
+ Moves.push_back(MachineMove(ReadyLabel, FPDst, FPSrc));
+ }
+ }
+
+ if (needsFrameMoves) {
+ MCSymbol *Label = HasFP ? ReadyLabel : FrameLabel;
+
+ // Add callee saved registers to move list.
+ const std::vector<CalleeSavedInfo> &CSI = MFI->getCalleeSavedInfo();
+ for (unsigned I = 0, E = CSI.size(); I != E; ++I) {
+ int Offset = MFI->getObjectOffset(CSI[I].getFrameIdx());
+ unsigned Reg = CSI[I].getReg();
+ if (Reg == PPC::LR || Reg == PPC::LR8 || Reg == PPC::RM) continue;
+ MachineLocation CSDst(MachineLocation::VirtualFP, Offset);
+ MachineLocation CSSrc(Reg);
+ Moves.push_back(MachineMove(Label, CSDst, CSSrc));
+ }
}
}
MachineBasicBlock &MBB) const {
MachineBasicBlock::iterator MBBI = prior(MBB.end());
unsigned RetOpcode = MBBI->getOpcode();
- DebugLoc dl = DebugLoc::getUnknownLoc();
+ DebugLoc dl;
assert( (RetOpcode == PPC::BLR ||
RetOpcode == PPC::TCRETURNri ||
int FrameSize = MFI->getStackSize();
// Get processor type.
- bool IsPPC64 = Subtarget.isPPC64();
+ bool isPPC64 = Subtarget.isPPC64();
// Get operating system
bool isDarwinABI = Subtarget.isDarwinABI();
// Check if the link register (LR) has been saved.
// Do we have a frame pointer for this function?
bool HasFP = hasFP(MF) && FrameSize;
- int LROffset = PPCFrameInfo::getReturnSaveOffset(IsPPC64, isDarwinABI);
+ int LROffset = PPCFrameInfo::getReturnSaveOffset(isPPC64, isDarwinABI);
int FPOffset = 0;
if (HasFP) {
assert(FPIndex && "No Frame Pointer Save Slot!");
FPOffset = FFI->getObjectOffset(FPIndex);
} else {
- FPOffset = PPCFrameInfo::getFramePointerSaveOffset(IsPPC64, isDarwinABI);
+ FPOffset = PPCFrameInfo::getFramePointerSaveOffset(isPPC64, isDarwinABI);
}
}
if (FrameSize) {
// The loaded (or persistent) stack pointer value is offset by the 'stwu'
// on entry to the function. Add this offset back now.
- if (!IsPPC64) {
- // If this function contained a fastcc call and PerformTailCallOpt is
+ if (!isPPC64) {
+ // If this function contained a fastcc call and GuaranteedTailCallOpt is
// enabled (=> hasFastCall()==true) the fastcc call might contain a tail
// call which invalidates the stack pointer value in SP(0). So we use the
// value of R31 in this case.
- if (FI->hasFastCall() && isInt16(FrameSize)) {
+ if (FI->hasFastCall() && isInt<16>(FrameSize)) {
assert(hasFP(MF) && "Expecting a valid the frame pointer.");
BuildMI(MBB, MBBI, dl, TII.get(PPC::ADDI), PPC::R1)
.addReg(PPC::R31).addImm(FrameSize);
.addReg(PPC::R1)
.addReg(PPC::R31)
.addReg(PPC::R0);
- } else if (isInt16(FrameSize) &&
+ } else if (isInt<16>(FrameSize) &&
(!ALIGN_STACK || TargetAlign >= MaxAlign) &&
!MFI->hasVarSizedObjects()) {
BuildMI(MBB, MBBI, dl, TII.get(PPC::ADDI), PPC::R1)
.addImm(0).addReg(PPC::R1);
}
} else {
- if (FI->hasFastCall() && isInt16(FrameSize)) {
+ if (FI->hasFastCall() && isInt<16>(FrameSize)) {
assert(hasFP(MF) && "Expecting a valid the frame pointer.");
BuildMI(MBB, MBBI, dl, TII.get(PPC::ADDI8), PPC::X1)
.addReg(PPC::X31).addImm(FrameSize);
.addReg(PPC::X1)
.addReg(PPC::X31)
.addReg(PPC::X0);
- } else if (isInt16(FrameSize) && TargetAlign >= MaxAlign &&
+ } else if (isInt<16>(FrameSize) && TargetAlign >= MaxAlign &&
!MFI->hasVarSizedObjects()) {
BuildMI(MBB, MBBI, dl, TII.get(PPC::ADDI8), PPC::X1)
.addReg(PPC::X1).addImm(FrameSize);
}
}
- if (IsPPC64) {
+ if (isPPC64) {
if (MustSaveLR)
BuildMI(MBB, MBBI, dl, TII.get(PPC::LD), PPC::X0)
.addImm(LROffset/4).addReg(PPC::X1);
// Callee pop calling convention. Pop parameter/linkage area. Used for tail
// call optimization
- if (PerformTailCallOpt && RetOpcode == PPC::BLR &&
+ if (GuaranteedTailCallOpt && RetOpcode == PPC::BLR &&
MF.getFunction()->getCallingConv() == CallingConv::Fast) {
PPCFunctionInfo *FI = MF.getInfo<PPCFunctionInfo>();
unsigned CallerAllocatedAmt = FI->getMinReservedArea();
- unsigned StackReg = IsPPC64 ? PPC::X1 : PPC::R1;
- unsigned FPReg = IsPPC64 ? PPC::X31 : PPC::R31;
- unsigned TmpReg = IsPPC64 ? PPC::X0 : PPC::R0;
- unsigned ADDIInstr = IsPPC64 ? PPC::ADDI8 : PPC::ADDI;
- unsigned ADDInstr = IsPPC64 ? PPC::ADD8 : PPC::ADD4;
- unsigned LISInstr = IsPPC64 ? PPC::LIS8 : PPC::LIS;
- unsigned ORIInstr = IsPPC64 ? PPC::ORI8 : PPC::ORI;
-
- if (CallerAllocatedAmt && isInt16(CallerAllocatedAmt)) {
+ unsigned StackReg = isPPC64 ? PPC::X1 : PPC::R1;
+ unsigned FPReg = isPPC64 ? PPC::X31 : PPC::R31;
+ unsigned TmpReg = isPPC64 ? PPC::X0 : PPC::R0;
+ unsigned ADDIInstr = isPPC64 ? PPC::ADDI8 : PPC::ADDI;
+ unsigned ADDInstr = isPPC64 ? PPC::ADD8 : PPC::ADD4;
+ unsigned LISInstr = isPPC64 ? PPC::LIS8 : PPC::LIS;
+ unsigned ORIInstr = isPPC64 ? PPC::ORI8 : PPC::ORI;
+
+ if (CallerAllocatedAmt && isInt<16>(CallerAllocatedAmt)) {
BuildMI(MBB, MBBI, dl, TII.get(ADDIInstr), StackReg)
.addReg(StackReg).addImm(CallerAllocatedAmt);
} else {
return !Subtarget.isPPC64() ? PPC::LR : PPC::LR8;
}
-unsigned PPCRegisterInfo::getFrameRegister(MachineFunction &MF) const {
+unsigned PPCRegisterInfo::getFrameRegister(const MachineFunction &MF) const {
if (!Subtarget.isPPC64())
return hasFP(MF) ? PPC::R31 : PPC::R1;
else
projects / oota-llvm.git / blobdiff