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Two-address pass should use findCommutedOpIndices to determine what registers are commuted. 

llvm-svn: 75317
This commit is contained in:
Evan Cheng 2009-07-11 00:04:23 +00:00
parent 74a7b9188a
commit b4dfce2dba
1 changed files with 10 additions and 3 deletions
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13
llvm/lib/CodeGen/TwoAddressInstructionPass.cpp
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@ -909,9 +909,16 @@ bool TwoAddressInstructionPass::runOnMachineFunction(MachineFunction &MF) {
}
// If it's profitable to commute the instruction, do so.
if (TID.isCommutable() && mi->getNumOperands() >= 3) {
unsigned regC = mi->getOperand(3-si).getReg();
if (isProfitableToCommute(regB, regC, mi, mbbi, Dist))
unsigned SrcOp1, SrcOp2;
if (TID.isCommutable() && mi->getNumOperands() >= 3 &&
TII->findCommutedOpIndices(mi, SrcOp1, SrcOp2)) {
unsigned regC = 0;
if (si == SrcOp1)
regC = mi->getOperand(SrcOp2).getReg();
else if (si == SrcOp2)
regC = mi->getOperand(SrcOp1).getReg();
if (regC && isProfitableToCommute(regB, regC, mi, mbbi, Dist))
if (CommuteInstruction(mi, mbbi, regB, regC, Dist)) {
++NumAggrCommuted;
++NumCommuted;