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| author | Cameron Zwarich <zwarich@apple.com> | 2011-10-12 21:24:54 +0000 |
|---|---|---|
| committer | Cameron Zwarich <zwarich@apple.com> | 2011-10-12 21:24:54 +0000 |
| commit | 980df169203a5f60793e758cdc5cbcad853ca9eb (patch) | |
| tree | 1f603569c753d569b66c8d17f7e9afe5f7457e6e /lib/CodeGen/StrongPHIElimination.cpp | |
| parent | c66e7afcf2810a2c1ebf08514eaf45c478e5ff67 (diff) | |
| download | llvm-980df169203a5f60793e758cdc5cbcad853ca9eb.tar.gz llvm-980df169203a5f60793e758cdc5cbcad853ca9eb.tar.bz2 llvm-980df169203a5f60793e758cdc5cbcad853ca9eb.tar.xz | |
To find the exiting VN of a LiveInterval from a block, use the previous slot
rather than the previous index. If a block has a single instruction, the
previous index may be in a different basic block.
I have no clue how this used to work on all of test-suite, because now this
failure is seen quite often when trying to compile code with -strong-phi-elim.
This fixes PR10252.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141812 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/StrongPHIElimination.cpp')
| -rw-r--r-- | lib/CodeGen/StrongPHIElimination.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/CodeGen/StrongPHIElimination.cpp b/lib/CodeGen/StrongPHIElimination.cpp index 0fabd8e6ee..76e6c9966a 100644 --- a/lib/CodeGen/StrongPHIElimination.cpp +++ b/lib/CodeGen/StrongPHIElimination.cpp @@ -674,7 +674,7 @@ void StrongPHIElimination::InsertCopiesForPHI(MachineInstr *PHI, if (PHIColor && SrcColor == PHIColor) { LiveInterval &SrcInterval = LI->getInterval(SrcReg); SlotIndex PredIndex = LI->getMBBEndIdx(PredBB); - VNInfo *SrcVNI = SrcInterval.getVNInfoAt(PredIndex.getPrevIndex()); + VNInfo *SrcVNI = SrcInterval.getVNInfoAt(PredIndex.getPrevSlot()); assert(SrcVNI); SrcVNI->setHasPHIKill(true); continue; |