1 files changed, 4 insertions, 1 deletions
diff --git a/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp b/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
index 217f929e9ad..a5e31f21166 100644
--- a/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
+++ b/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
@@ -610,7 +610,10 @@ Value *LibCallSimplifier::optimizeStrNCpy(CallInst *CI, IRBuilder<> &B) {
 
   if (SrcLen == 0) {
     // strncpy(x, "", y) -> memset(align 1 x, '\0', y)
-    B.CreateMemSet(Dst, B.getInt8('\0'), Size, 1);
+    CallInst *NewCI = B.CreateMemSet(Dst, B.getInt8('\0'), Size, 1);
+    AttrBuilder ArgAttrs(CI->getAttributes().getParamAttributes(0));
+    NewCI->setAttributes(NewCI->getAttributes().addParamAttributes(
+        CI->getContext(), 0, ArgAttrs));
     return Dst;
   }