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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-03-17 20:37:07 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-03-17 20:37:07 +0000 |
| commit | 8630840c30a99e54414c0ee9b39928813301dcfc (patch) | |
| tree | 72387a2f78bd3a5a2c92d3ba40eca404749dd3d5 /llvm/include | |
| parent | 35944dda103ed588b68970c24bcd79b26d1b2dfd (diff) | |
| download | bcm5719-llvm-8630840c30a99e54414c0ee9b39928813301dcfc.tar.gz bcm5719-llvm-8630840c30a99e54414c0ee9b39928813301dcfc.zip | |
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.
llvm-svn: 127827
Diffstat (limited to 'llvm/include')
| -rw-r--r-- | llvm/include/llvm/CodeGen/LiveIntervalAnalysis.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/llvm/include/llvm/CodeGen/LiveIntervalAnalysis.h b/llvm/include/llvm/CodeGen/LiveIntervalAnalysis.h index b541a3a649f..8ca58b82c8b 100644 --- a/llvm/include/llvm/CodeGen/LiveIntervalAnalysis.h +++ b/llvm/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 |
