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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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9
lib/CodeGen/LiveVariables.cpp
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@ -684,6 +684,15 @@ void LiveVariables::instructionChanged(MachineInstr *OldMI,
}
}
/// replaceKillInstruction - Update register kill info by replacing a kill
/// instruction with a new one.
void LiveVariables::replaceKillInstruction(unsigned Reg, MachineInstr *OldMI,
MachineInstr *NewMI) {
VarInfo &VI = getVarInfo(Reg);
if (VI.removeKill(OldMI))
VI.Kills.push_back(NewMI); // Yes, there was a kill of it
}
/// removeVirtualRegistersKilled - Remove all killed info for the specified
/// instruction.
void LiveVariables::removeVirtualRegistersKilled(MachineInstr *MI) {