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- Add LiveVariables::replaceKillInstruction. This does a subset of instructionChanged. That is, it only update the VarInfo.kills if the new instruction is known to have the correct dead and kill markers.

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- CommuteInstruction copies kill / dead markers over to new instruction. So use replaceKillInstruction instead.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53061 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2008-07-03 00:07:19 +00:00
parent 457b88fb95
commit be04dc1413
3 changed files with 16 additions and 3 deletions
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lib/CodeGen/TwoAddressInstructionPass.cpp
+2 -3
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@@ -375,10 +375,9 @@ bool TwoAddressInstructionPass::runOnMachineFunction(MachineFunction &MF) {
DOUT << "2addr: COMMUTED TO: " << *NewMI;
// If the instruction changed to commute it, update livevar.
if (NewMI != mi) {
if (LV) {
if (LV)
// Update live variables
LV->instructionChanged(mi, NewMI);
}
LV->replaceKillInstruction(regC, mi, NewMI);
mbbi->insert(mi, NewMI); // Insert the new inst
mbbi->erase(mi); // Nuke the old inst.