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Correctly update def/use information for modified machine operands.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11087 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Alkis Evlogimenos 2004-02-02 21:56:40 +00:00
parent 782ce955b2
commit eea81bafd6
1 changed files with 9 additions and 3 deletions
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12
lib/CodeGen/TwoAddressInstructionPass.cpp
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@ -146,11 +146,17 @@ bool TwoAddressInstructionPass::runOnMachineFunction(MachineFunction &MF) {
LV.addVirtualRegisterDead(regB, &*mbbi, prevMi);
// replace all occurences of regB with regA
// and mark all uses and defs of regA as def&use
for (unsigned i = 1; i < mi->getNumOperands(); ++i) {
if (mi->getOperand(i).isRegister() &&
mi->getOperand(i).getReg() == regB)
mi->SetMachineOperandReg(i, regA);
MachineOperand& op = mi->getOperand(i);
if (op.isRegister()) {
if (op.getReg() == regB)
mi->SetMachineOperandReg(i, regA);
if (op.getReg() == regA)
op.setDef().setUse();
}
}
DEBUG(std::cerr << "\t\tmodified original to: ";
mi->print(std::cerr, TM));
assert(mi->getOperand(0).getAllocatedRegNum() ==