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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-03-17 20:37:07 +0000 |
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| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-03-17 20:37:07 +0000 |
| commit | 6a3dbd3b25bbc99bd1a233d6a74ddea3493ba6ac (patch) | |
| tree | 512a2f340823e0cb054136093b13d679f6200e6b /include | |
| parent | c74513d1b6e2f6c91533a23ebbdc47a6f1dfcc0c (diff) | |
| download | llvm-6a3dbd3b25bbc99bd1a233d6a74ddea3493ba6ac.tar.gz llvm-6a3dbd3b25bbc99bd1a233d6a74ddea3493ba6ac.tar.bz2 llvm-6a3dbd3b25bbc99bd1a233d6a74ddea3493ba6ac.tar.xz | |
Dead code elimination may separate the live interval into multiple connected components.
I have convinced myself that it can only happen when a phi value dies. When it
happens, allocate new virtual registers for the components.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127827 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include')
| -rw-r--r-- | include/llvm/CodeGen/LiveIntervalAnalysis.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/llvm/CodeGen/LiveIntervalAnalysis.h b/include/llvm/CodeGen/LiveIntervalAnalysis.h index b541a3a649..8ca58b82c8 100644 --- a/include/llvm/CodeGen/LiveIntervalAnalysis.h +++ b/include/llvm/CodeGen/LiveIntervalAnalysis.h @@ -160,7 +160,9 @@ namespace llvm { /// defs for new uses, and it doesn't remove dead defs. /// Dead PHIDef values are marked as unused. /// New dead machine instructions are added to the dead vector. - void shrinkToUses(LiveInterval *li, + /// Return true if the interval may have been separated into multiple + /// connected components. + bool shrinkToUses(LiveInterval *li, SmallVectorImpl<MachineInstr*> *dead = 0); // Interval removal |