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-rw-r--r--llvm/lib/Analysis/BasicAliasAnalysis.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/llvm/lib/Analysis/BasicAliasAnalysis.cpp b/llvm/lib/Analysis/BasicAliasAnalysis.cpp
index c162b8f..ca65abe 100644
--- a/llvm/lib/Analysis/BasicAliasAnalysis.cpp
+++ b/llvm/lib/Analysis/BasicAliasAnalysis.cpp
@@ -662,6 +662,7 @@ BasicAAResult::DecomposeGEPExpression(const Value *V, const DataLayout &DL,
if (Decomposed.VarIndices[i].Val.V == LE.Val.V &&
Decomposed.VarIndices[i].Val.hasSameCastsAs(LE.Val)) {
Scale += Decomposed.VarIndices[i].Scale;
+ LE.IsNSW = false; // We cannot guarantee nsw for the merge.
Decomposed.VarIndices.erase(Decomposed.VarIndices.begin() + i);
break;
}