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Make sure not to break eh_return. 

llvm-svn: 39978
This commit is contained in:
Evan Cheng 2007-07-17 18:40:47 +00:00
parent 27ba94bf3b
commit b2bb4b4040
1 changed files with 10 additions and 9 deletions
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19
llvm/lib/Target/X86/X86RegisterInfo.cpp
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@ -1332,14 +1332,6 @@ void X86RegisterInfo::emitEpilogue(MachineFunction &MF,
NumBytes -= SlotSize;
}
// We're returning from function via eh_return.
if (RetOpcode == X86::EH_RETURN) {
MachineOperand &DestAddr = MBBI->getOperand(0);
assert(DestAddr.isReg() && "Offset should be in register!");
BuildMI(MBB, MBBI, TII.get(Is64Bit ? X86::MOV64rr : X86::MOV32rr),StackPtr).
addReg(DestAddr.getReg());
}
// Skip the callee-saved pop instructions.
while (MBBI != MBB.begin()) {
MachineBasicBlock::iterator PI = prior(MBBI);
@ -1355,7 +1347,7 @@ void X86RegisterInfo::emitEpilogue(MachineFunction &MF,
MachineInstr *MI = addRegOffset(BuildMI(TII.get(Opc), StackPtr),
FramePtr, -CSSize);
MBB.insert(MBBI, MI);
return;
NumBytes = 0;
}
if (NumBytes) { // adjust stack pointer back: ESP += numbytes
@ -1380,6 +1372,15 @@ void X86RegisterInfo::emitEpilogue(MachineFunction &MF,
if (NumBytes)
emitSPUpdate(MBB, MBBI, StackPtr, NumBytes, Is64Bit, TII);
}
// We're returning from function via eh_return.
if (RetOpcode == X86::EH_RETURN) {
MBBI = prior(MBB.end());
MachineOperand &DestAddr = MBBI->getOperand(0);
assert(DestAddr.isReg() && "Offset should be in register!");
BuildMI(MBB, MBBI, TII.get(Is64Bit ? X86::MOV64rr : X86::MOV32rr),StackPtr).
addReg(DestAddr.getReg());
}
}
unsigned X86RegisterInfo::getRARegister() const {