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Correctly update LiveVariables when an instruction changes

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12561 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Alkis Evlogimenos
2004-03-30 22:44:39 +00:00
parent 307ecbaddb
commit a8db01ac83
1 changed files with 3 additions and 3 deletions
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6
lib/CodeGen/LiveVariables.cpp
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@ -326,14 +326,14 @@ void LiveVariables::instructionChanged(MachineInstr *OldMI,
MachineInstr *NewMI) { MachineInstr *NewMI) {
// If the instruction defines any virtual registers, update the VarInfo for // If the instruction defines any virtual registers, update the VarInfo for
// the instruction. // the instruction.
for (unsigned i = 0, e = NewMI->getNumOperands(); i != e; ++i) { for (unsigned i = 0, e = OldMI->getNumOperands(); i != e; ++i) {
MachineOperand &MO = NewMI->getOperand(i); MachineOperand &MO = OldMI->getOperand(i);
if (MO.isRegister() && MO.isDef() && MO.getReg() && if (MO.isRegister() && MO.isDef() && MO.getReg() &&
MRegisterInfo::isVirtualRegister(MO.getReg())) { MRegisterInfo::isVirtualRegister(MO.getReg())) {
unsigned Reg = MO.getReg(); unsigned Reg = MO.getReg();
VarInfo &VI = getVarInfo(Reg); VarInfo &VI = getVarInfo(Reg);
if (VI.DefInst == OldMI) if (VI.DefInst == OldMI)
VI.DefInst = NewMI; VI.DefInst = NewMI;
} }
} }