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;
}
ret i8* %ret
}
+define i8* @test3(i8* %dst, i32 %n) {
+; CHECK-LABEL: @test3(
+; CHECK-NEXT: call void @llvm.memset.p0i8.i32(i8* noalias nonnull align 1 dereferenceable(5) [[DST:%.*]], i8 0, i32 5, i1 false)
+; CHECK-NEXT: ret i8* [[DST]]
+;
+ %src = getelementptr [1 x i8], [1 x i8]* @null, i32 0, i32 0
+ %ret = call i8* @strncpy(i8* noalias nonnull %dst, i8* nonnull %src, i32 5);
+ ret i8* %ret
+}
+
; Check cases that shouldn't be simplified.
define void @test_no_simplify1() {