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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-01-26 17:52:15 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-01-26 17:52:15 +0000 |
| commit | 1a96c914315b0286d84c507d696484e2c95875a4 (patch) | |
| tree | 58b1f0a6bb6afe302f820c7970a4e6fe1cb5d1b7 /include | |
| parent | ef4d3ebe2a36ebfd9370e1efbe74dff13f64c40f (diff) | |
| download | llvm-1a96c914315b0286d84c507d696484e2c95875a4.tar.gz llvm-1a96c914315b0286d84c507d696484e2c95875a4.tar.bz2 llvm-1a96c914315b0286d84c507d696484e2c95875a4.tar.xz | |
Clear kill flags before propagating a copy.
The live range of the source register may be extended when a redundant
copy is eliminated. Make sure any kill flags between the two copies are
cleared.
This fixes PR11765.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149069 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include')
| -rw-r--r-- | include/llvm/CodeGen/MachineInstr.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/llvm/CodeGen/MachineInstr.h b/include/llvm/CodeGen/MachineInstr.h index 660d0d02cf..f1d41d4482 100644 --- a/include/llvm/CodeGen/MachineInstr.h +++ b/include/llvm/CodeGen/MachineInstr.h @@ -773,6 +773,10 @@ public: const TargetRegisterInfo *RegInfo, bool AddIfNotFound = false); + /// clearRegisterKills - Clear all kill flags affecting Reg. If RegInfo is + /// provided, this includes super-register kills. + void clearRegisterKills(unsigned Reg, const TargetRegisterInfo *RegInfo); + /// addRegisterDead - We have determined MI defined a register without a use. /// Look for the operand that defines it and mark it as IsDead. If /// AddIfNotFound is true, add a implicit operand if it's not found. Returns |