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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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5
include/llvm/CodeGen/LiveVariables.h
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@ -189,6 +189,11 @@ public:
/// the records for NewMI.
void instructionChanged(MachineInstr *OldMI, MachineInstr *NewMI);
/// replaceKillInstruction - Update register kill info by replacing a kill
/// instruction with a new one.
void replaceKillInstruction(unsigned Reg, MachineInstr *OldMI,
MachineInstr *NewMI);
/// addVirtualRegisterKilled - Add information about the fact that the
/// specified register is killed after being used by the specified
/// instruction. If AddIfNotFound is true, add a implicit operand if it's