diff options
| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-04-07 18:43:14 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-04-07 18:43:14 +0000 |
| commit | e815dab69f57da3f0ff365709491c7409cbb71bd (patch) | |
| tree | 67a02ac9edb7191a1eaa4f11f6472ef4104ee74d /lib/CodeGen | |
| parent | 4d4e25740bd1225f413a10db6166b620d2f5fbbb (diff) | |
Recompute hasPHIKill flags when shrinking live intervals.
PHI values may be deleted, causing the flags to be wrong. This fixes PR9616.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129092 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen')
| -rw-r--r-- | lib/CodeGen/LiveIntervalAnalysis.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp index 07f83ea7ce..c77ae1b7a7 100644 --- a/lib/CodeGen/LiveIntervalAnalysis.cpp +++ b/lib/CodeGen/LiveIntervalAnalysis.cpp @@ -787,6 +787,8 @@ bool LiveIntervals::shrinkToUses(LiveInterval *li, VNInfo *VNI = *I; if (VNI->isUnused()) continue; + // We may eliminate PHI values, so recompute PHIKill flags. + VNI->setHasPHIKill(false); NewLI.addRange(LiveRange(VNI->def, VNI->def.getNextSlot(), VNI)); // A use tied to an early-clobber def ends at the load slot and isn't caught @@ -822,7 +824,7 @@ bool LiveIntervals::shrinkToUses(LiveInterval *li, VNInfo *PVNI = li->getVNInfoAt(Stop); // A predecessor is not required to have a live-out value for a PHI. if (PVNI) { - assert(PVNI->hasPHIKill() && "Missing hasPHIKill flag"); + PVNI->setHasPHIKill(true); WorkList.push_back(std::make_pair(Stop, PVNI)); } } |