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Explicitly check for the different SUB instructions. 

llvm-svn: 145976
This commit is contained in:
Bill Wendling 2011-12-06 22:14:27 +00:00
parent 2a81dd4a3c
commit 67a70c995a
1 changed files with 2 additions and 5 deletions
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7
llvm/lib/Target/X86/X86FrameLowering.cpp
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@ -475,9 +475,6 @@ uint32_t X86FrameLowering::getCompactUnwindEncoding(MachineFunction &MF) const {
unsigned FramePtr = RegInfo->getFrameRegister(MF);
unsigned StackPtr = RegInfo->getStackRegister();
X86MachineFunctionInfo *X86FI = MF.getInfo<X86MachineFunctionInfo>();
int TailCallReturnAddrDelta = X86FI->getTCReturnAddrDelta();
bool Is64Bit = STI.is64Bit();
bool HasFP = hasFP(MF);
@ -490,7 +487,6 @@ uint32_t X86FrameLowering::getCompactUnwindEncoding(MachineFunction &MF) const {
unsigned PushInstrSize = 1;
unsigned MoveInstr = (Is64Bit ? X86::MOV64rr : X86::MOV32rr);
unsigned MoveInstrSize = (Is64Bit ? 3 : 2);
unsigned SubtractInstr = getSUBriOpcode(Is64Bit, -TailCallReturnAddrDelta);
unsigned SubtractInstrIdx = (Is64Bit ? 3 : 2);
unsigned StackDivide = (Is64Bit ? 8 : 4);
@ -529,7 +525,8 @@ uint32_t X86FrameLowering::getCompactUnwindEncoding(MachineFunction &MF) const {
memset(SavedRegs, 0, sizeof(SavedRegs));
SavedRegIdx = CU_NUM_SAVED_REGS;
InstrOffset += MoveInstrSize;
} else if (Opc == SubtractInstr) {
} else if (Opc == X86::SUB64ri32 || Opc == X86::SUB64ri8 ||
Opc == X86::SUB32ri || Opc == X86::SUB32ri8) {
if (StackSize)
// We already have a stack size.
return 0;