const uint16_t *
X86RegisterInfo::getCalleeSavedRegs(const MachineFunction *MF) const {
- bool callsEHReturn = false;
- bool ghcCall = false;
- bool oclBiCall = false;
- bool hipeCall = false;
- bool HasAVX = TM.getSubtarget<X86Subtarget>().hasAVX();
-
- if (MF) {
- callsEHReturn = MF->getMMI().callsEHReturn();
- const Function *F = MF->getFunction();
- ghcCall = (F ? F->getCallingConv() == CallingConv::GHC : false);
- oclBiCall = (F ? F->getCallingConv() == CallingConv::Intel_OCL_BI : false);
- hipeCall = (F ? F->getCallingConv() == CallingConv::HiPE : false);
- }
-
- if (ghcCall || hipeCall)
+ switch (MF->getFunction()->getCallingConv()) {
+ case CallingConv::GHC:
+ case CallingConv::HiPE:
return CSR_NoRegs_SaveList;
- if (oclBiCall) {
+
+ case CallingConv::Intel_OCL_BI: {
+ bool HasAVX = TM.getSubtarget<X86Subtarget>().hasAVX();
if (HasAVX && IsWin64)
- return CSR_Win64_Intel_OCL_BI_AVX_SaveList;
+ return CSR_Win64_Intel_OCL_BI_AVX_SaveList;
if (HasAVX && Is64Bit)
- return CSR_64_Intel_OCL_BI_AVX_SaveList;
+ return CSR_64_Intel_OCL_BI_AVX_SaveList;
if (!HasAVX && !IsWin64 && Is64Bit)
- return CSR_64_Intel_OCL_BI_SaveList;
+ return CSR_64_Intel_OCL_BI_SaveList;
+ break;
+ }
+
+ case CallingConv::Cold:
+ if (Is64Bit)
+ return CSR_MostRegs_64_SaveList;
+ break;
+
+ default:
+ break;
}
+
+ bool CallsEHReturn = MF->getMMI().callsEHReturn();
if (Is64Bit) {
if (IsWin64)
return CSR_Win64_SaveList;
- if (callsEHReturn)
+ if (CallsEHReturn)
return CSR_64EHRet_SaveList;
return CSR_64_SaveList;
}
- if (callsEHReturn)
+ if (CallsEHReturn)
return CSR_32EHRet_SaveList;
return CSR_32_SaveList;
}
return CSR_NoRegs_RegMask;
if (!Is64Bit)
return CSR_32_RegMask;
+ if (CC == CallingConv::Cold)
+ return CSR_MostRegs_64_RegMask;
if (IsWin64)
return CSR_Win64_RegMask;
return CSR_64_RegMask;
return false;
}
-static unsigned getSUBriOpcode(unsigned is64Bit, int64_t Imm) {
- if (is64Bit) {
- if (isInt<8>(Imm))
- return X86::SUB64ri8;
- return X86::SUB64ri32;
- } else {
- if (isInt<8>(Imm))
- return X86::SUB32ri8;
- return X86::SUB32ri;
- }
-}
-
-static unsigned getADDriOpcode(unsigned is64Bit, int64_t Imm) {
- if (is64Bit) {
- if (isInt<8>(Imm))
- return X86::ADD64ri8;
- return X86::ADD64ri32;
- } else {
- if (isInt<8>(Imm))
- return X86::ADD32ri8;
- return X86::ADD32ri;
- }
-}
-
-void X86RegisterInfo::
-eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
- MachineBasicBlock::iterator I) const {
- const TargetFrameLowering *TFI = MF.getTarget().getFrameLowering();
- bool reseveCallFrame = TFI->hasReservedCallFrame(MF);
- int Opcode = I->getOpcode();
- bool isDestroy = Opcode == TII.getCallFrameDestroyOpcode();
- DebugLoc DL = I->getDebugLoc();
- uint64_t Amount = !reseveCallFrame ? I->getOperand(0).getImm() : 0;
- uint64_t CalleeAmt = isDestroy ? I->getOperand(1).getImm() : 0;
- I = MBB.erase(I);
-
- if (!reseveCallFrame) {
- // If the stack pointer can be changed after prologue, turn the
- // adjcallstackup instruction into a 'sub ESP, <amt>' and the
- // adjcallstackdown instruction into 'add ESP, <amt>'
- // TODO: consider using push / pop instead of sub + store / add
- if (Amount == 0)
- return;
-
- // We need to keep the stack aligned properly. To do this, we round the
- // amount of space needed for the outgoing arguments up to the next
- // alignment boundary.
- unsigned StackAlign = TM.getFrameLowering()->getStackAlignment();
- Amount = (Amount + StackAlign - 1) / StackAlign * StackAlign;
-
- MachineInstr *New = 0;
- if (Opcode == TII.getCallFrameSetupOpcode()) {
- New = BuildMI(MF, DL, TII.get(getSUBriOpcode(Is64Bit, Amount)),
- StackPtr)
- .addReg(StackPtr)
- .addImm(Amount);
- } else {
- assert(Opcode == TII.getCallFrameDestroyOpcode());
-
- // Factor out the amount the callee already popped.
- Amount -= CalleeAmt;
-
- if (Amount) {
- unsigned Opc = getADDriOpcode(Is64Bit, Amount);
- New = BuildMI(MF, DL, TII.get(Opc), StackPtr)
- .addReg(StackPtr).addImm(Amount);
- }
- }
-
- if (New) {
- // The EFLAGS implicit def is dead.
- New->getOperand(3).setIsDead();
-
- // Replace the pseudo instruction with a new instruction.
- MBB.insert(I, New);
- }
-
- return;
- }
-
- if (Opcode == TII.getCallFrameDestroyOpcode() && CalleeAmt) {
- // If we are performing frame pointer elimination and if the callee pops
- // something off the stack pointer, add it back. We do this until we have
- // more advanced stack pointer tracking ability.
- unsigned Opc = getSUBriOpcode(Is64Bit, CalleeAmt);
- MachineInstr *New = BuildMI(MF, DL, TII.get(Opc), StackPtr)
- .addReg(StackPtr).addImm(CalleeAmt);
-
- // The EFLAGS implicit def is dead.
- New->getOperand(3).setIsDead();
-
- // We are not tracking the stack pointer adjustment by the callee, so make
- // sure we restore the stack pointer immediately after the call, there may
- // be spill code inserted between the CALL and ADJCALLSTACKUP instructions.
- MachineBasicBlock::iterator B = MBB.begin();
- while (I != B && !llvm::prior(I)->isCall())
- --I;
- MBB.insert(I, New);
- }
-}
-
void
X86RegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
int SPAdj, unsigned FIOperandNum,
case MVT::i8:
if (High) {
switch (Reg) {
- default: return getX86SubSuperRegister(Reg, MVT::i64, High);
+ default: return getX86SubSuperRegister(Reg, MVT::i64);
+ case X86::SIL: case X86::SI: case X86::ESI: case X86::RSI:
+ return X86::SI;
+ case X86::DIL: case X86::DI: case X86::EDI: case X86::RDI:
+ return X86::DI;
+ case X86::BPL: case X86::BP: case X86::EBP: case X86::RBP:
+ return X86::BP;
+ case X86::SPL: case X86::SP: case X86::ESP: case X86::RSP:
+ return X86::SP;
case X86::AH: case X86::AL: case X86::AX: case X86::EAX: case X86::RAX:
return X86::AH;
case X86::DH: case X86::DL: case X86::DX: case X86::EDX: case X86::RDX:
return X86::R15D;
}
case MVT::i64:
- // For 64-bit mode if we've requested a "high" register and the
- // Q or r constraints we want one of these high registers or
- // just the register name otherwise.
- if (High) {
- switch (Reg) {
- case X86::SIL: case X86::SI: case X86::ESI: case X86::RSI:
- return X86::SI;
- case X86::DIL: case X86::DI: case X86::EDI: case X86::RDI:
- return X86::DI;
- case X86::BPL: case X86::BP: case X86::EBP: case X86::RBP:
- return X86::BP;
- case X86::SPL: case X86::SP: case X86::ESP: case X86::RSP:
- return X86::SP;
- // Fallthrough.
- }
- }
switch (Reg) {
default: llvm_unreachable("Unexpected register");
case X86::AH: case X86::AL: case X86::AX: case X86::EAX: case X86::RAX:
projects / oota-llvm.git / blobdiff