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commuteInstruction should propagate kill / dead info.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31763 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2006-11-15 20:56:03 +00:00
parent ddee842062
commit ff608a7a69
1 changed files with 10 additions and 0 deletions
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10
lib/Target/TargetInstrInfo.cpp
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@ -60,7 +60,17 @@ MachineInstr *TargetInstrInfo::commuteInstruction(MachineInstr *MI) const {
"This only knows how to commute register operands so far");
unsigned Reg1 = MI->getOperand(1).getReg();
unsigned Reg2 = MI->getOperand(2).getReg();
bool Reg1IsKill = MI->getOperand(1).isKill();
bool Reg2IsKill = MI->getOperand(2).isKill();
MI->getOperand(2).setReg(Reg1);
MI->getOperand(1).setReg(Reg2);
if (Reg1IsKill)
MI->getOperand(2).setIsKill();
else
MI->getOperand(2).unsetIsKill();
if (Reg2IsKill)
MI->getOperand(1).setIsKill();
else
MI->getOperand(1).unsetIsKill();
return MI;
}