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Diffstat (limited to 'include/llvm/CodeGen/LiveIntervalAnalysis.h')
| -rw-r--r-- | include/llvm/CodeGen/LiveIntervalAnalysis.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/llvm/CodeGen/LiveIntervalAnalysis.h b/include/llvm/CodeGen/LiveIntervalAnalysis.h index ddd623c..176665b 100644 --- a/include/llvm/CodeGen/LiveIntervalAnalysis.h +++ b/include/llvm/CodeGen/LiveIntervalAnalysis.h @@ -155,6 +155,17 @@ namespace llvm { bool shrinkToUses(LiveInterval *li, SmallVectorImpl<MachineInstr*> *dead = nullptr); + /// \brief Walk the values in the given interval and compute which ones + /// are dead. Dead values are not deleted, however: + /// - Dead PHIDef values are marked as unused. + /// - New dead machine instructions are added to the dead vector. + /// - CanSeparate is set to true if the interval may have been separated + /// into multiple connected components. + void computeDeadValues(LiveInterval *li, + LiveRange &LR, + bool *CanSeparate, + SmallVectorImpl<MachineInstr*> *dead); + /// extendToIndices - Extend the live range of LI to reach all points in /// Indices. The points in the Indices array must be jointly dominated by /// existing defs in LI. PHI-defs are added as needed to maintain SSA form. |