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| author | Evan Cheng <evan.cheng@apple.com> | 2008-07-03 00:07:19 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2008-07-03 00:07:19 +0000 |
| commit | be04dc1413bdab0c8687a8086792af6cfd7540c0 (patch) | |
| tree | ec20a72422a289cd10907a1515c5a6812064e1ec /lib/CodeGen/LiveVariables.cpp | |
| parent | 457b88fb95be895d914e52f3b44014a82e645e4a (diff) | |
- 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.
- 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
Diffstat (limited to 'lib/CodeGen/LiveVariables.cpp')
| -rw-r--r-- | lib/CodeGen/LiveVariables.cpp | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/CodeGen/LiveVariables.cpp b/lib/CodeGen/LiveVariables.cpp index ab73c97ec9..ee4492b6dd 100644 --- a/lib/CodeGen/LiveVariables.cpp +++ b/lib/CodeGen/LiveVariables.cpp @@ -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) { |