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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-06-01 22:39:25 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-06-01 22:39:25 +0000 |
| commit | a5135f60dd95275dcbc1123f866889151ced933d (patch) | |
| tree | 5e0dc69e54f439ac7bb172b3d378844eed75e103 /lib/CodeGen/MachineInstr.cpp | |
| parent | 23d3d4595c23784494cba422a76428e48431413a (diff) | |
| download | llvm-a5135f60dd95275dcbc1123f866889151ced933d.tar.gz llvm-a5135f60dd95275dcbc1123f866889151ced933d.tar.bz2 llvm-a5135f60dd95275dcbc1123f866889151ced933d.tar.xz | |
Properly compose subregister indices when coalescing.
The comment about ordering of subreg indices is no longer true.
This exposed a bug in the new substVirtReg method that is also fixed.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105294 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/MachineInstr.cpp')
| -rw-r--r-- | lib/CodeGen/MachineInstr.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/CodeGen/MachineInstr.cpp b/lib/CodeGen/MachineInstr.cpp index ce0c5e6a87..402178dc6d 100644 --- a/lib/CodeGen/MachineInstr.cpp +++ b/lib/CodeGen/MachineInstr.cpp @@ -117,7 +117,8 @@ void MachineOperand::substVirtReg(unsigned Reg, unsigned SubIdx, if (SubIdx && getSubReg()) SubIdx = TRI.composeSubRegIndices(SubIdx, getSubReg()); setReg(Reg); - setSubReg(SubIdx); + if (SubIdx) + setSubReg(SubIdx); } void MachineOperand::substPhysReg(unsigned Reg, const TargetRegisterInfo &TRI) { |