[SimplifyLibCalls] Fix -Wunused-result after D53342/r372091

MaskRay · MaskRay · commit 835176370950 · 2019-09-17T09:56:55.000Z
llvm-svn: 372096
diff --git a/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp b/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
@@ -612,7 +612,8 @@ Value *LibCallSimplifier::optimizeStrNCpy(CallInst *CI, IRBuilder<> &B) {
     // strncpy(x, "", y) -> memset(align 1 x, '\0', y)
     CallInst *NewCI = B.CreateMemSet(Dst, B.getInt8('\0'), Size, 1);
     AttrBuilder ArgAttrs(CI->getAttributes().getParamAttributes(0));
-    NewCI->getAttributes().addParamAttributes(CI->getContext(), 0, ArgAttrs);
+    NewCI->setAttributes(NewCI->getAttributes().addParamAttributes(
+        CI->getContext(), 0, ArgAttrs));
     return Dst;
   }
 

Original file line number	Diff line number	Diff line change
`@@ -612,7 +612,8 @@ Value LibCallSimplifier::optimizeStrNCpy(CallInst CI, IRBuilder<> &B) {`
`612`	`612`	`// strncpy(x, "", y) -> memset(align 1 x, '\0', y)`
`613`	`613`	`CallInst *NewCI = B.CreateMemSet(Dst, B.getInt8('\0'), Size, 1);`
`614`	`614`	`AttrBuilder ArgAttrs(CI->getAttributes().getParamAttributes(0));`
`615`		`- NewCI->getAttributes().addParamAttributes(CI->getContext(), 0, ArgAttrs);`
	`615`	`+ NewCI->setAttributes(NewCI->getAttributes().addParamAttributes(`
	`616`	`+ CI->getContext(), 0, ArgAttrs));`
`616`	`617`	`return Dst;`
`617`	`618`	`}`
`618`	`619`