Add Support for 'warn_unused_result" attribute on
objective-c methods. (radar 7418262).
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@99903 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/Expr.cpp b/lib/AST/Expr.cpp
index 6a71e92..b4e5a5d 100644
--- a/lib/AST/Expr.cpp
+++ b/lib/AST/Expr.cpp
@@ -914,8 +914,15 @@
case CXXConstructExprClass:
return false;
- case ObjCMessageExprClass:
+ case ObjCMessageExprClass: {
+ const ObjCMessageExpr *ME = cast<ObjCMessageExpr>(this);
+ const ObjCMethodDecl *MD = ME->getMethodDecl();
+ if (MD && MD->getAttr<WarnUnusedResultAttr>()) {
+ Loc = getExprLoc();
+ return true;
+ }
return false;
+ }
case ObjCImplicitSetterGetterRefExprClass: { // Dot syntax for message send.
#if 0