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Correctly update LiveVariables when an instruction changes

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llvm-svn: 12561
This commit is contained in:
Alkis Evlogimenos 2004-03-30 22:44:39 +00:00
parent f477746a61
commit 45cb0b871d
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) {
// If the instruction defines any virtual registers, update the VarInfo for
// the instruction.
for (unsigned i = 0, e = NewMI->getNumOperands(); i != e; ++i) {
MachineOperand &MO = NewMI->getOperand(i);
for (unsigned i = 0, e = OldMI->getNumOperands(); i != e; ++i) {
MachineOperand &MO = OldMI->getOperand(i);
if (MO.isRegister() && MO.isDef() && MO.getReg() &&
MRegisterInfo::isVirtualRegister(MO.getReg())) {
unsigned Reg = MO.getReg();
VarInfo &VI = getVarInfo(Reg);
if (VI.DefInst == OldMI)
VI.DefInst = NewMI;
VI.DefInst = NewMI;
}
}