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-rw-r--r--lib/Transforms/Scalar/SimplifyLibCalls.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/Transforms/Scalar/SimplifyLibCalls.cpp b/lib/Transforms/Scalar/SimplifyLibCalls.cpp
index 1100d6dd77..99b05389b2 100644
--- a/lib/Transforms/Scalar/SimplifyLibCalls.cpp
+++ b/lib/Transforms/Scalar/SimplifyLibCalls.cpp
@@ -1942,6 +1942,7 @@ void SimplifyLibCalls::inferPrototypeAttributes(Function &F) {
!FTy->getReturnType()->isPointerTy())
return;
setDoesNotThrow(F);
+ setDoesNotAlias(F, 0);
setDoesNotCapture(F, 1);
} else if (Name == "read") {
if (FTy->getNumParams() != 3 ||