diff options
Diffstat (limited to 'lib/Analysis/DependenceAnalysis.cpp')
| -rw-r--r-- | lib/Analysis/DependenceAnalysis.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/Analysis/DependenceAnalysis.cpp b/lib/Analysis/DependenceAnalysis.cpp index 684da98ce2..385e779a59 100644 --- a/lib/Analysis/DependenceAnalysis.cpp +++ b/lib/Analysis/DependenceAnalysis.cpp @@ -3199,6 +3199,9 @@ static void dumpSmallBitVector(SmallBitVector &BV) { Dependence *DependenceAnalysis::depends(Instruction *Src, Instruction *Dst, bool PossiblyLoopIndependent) { + if (Src == Dst) + PossiblyLoopIndependent = false; + if ((!Src->mayReadFromMemory() && !Src->mayWriteToMemory()) || (!Dst->mayReadFromMemory() && !Dst->mayWriteToMemory())) // if both instructions don't reference memory, there's no dependence |