From 853d21a18aeaf98be0c3b3fa67a59dd94b3b756d Mon Sep 17 00:00:00 2001
From: Fariborz Jahanian <fjahanian@apple.com>
Date: Wed, 12 Aug 2009 00:45:33 +0000
Subject: [PATCH] Warn on use of property dot syntax when unused.

llvm-svn: 78760
---
 clang/lib/AST/Expr.cpp       | 1 -
 clang/test/SemaObjC/unused.m | 3 +--
 2 files changed, 1 insertion(+), 3 deletions(-)

diff --git a/clang/lib/AST/Expr.cpp b/clang/lib/AST/Expr.cpp
index 6aa971112d57..ce8bb516c090 100644
--- a/clang/lib/AST/Expr.cpp
+++ b/clang/lib/AST/Expr.cpp
@@ -540,7 +540,6 @@ bool Expr::isUnusedResultAWarning(SourceLocation &Loc, SourceRange &R1,
     return false;
   }
   case ObjCMessageExprClass:
-  case ObjCKVCRefExprClass:   // Dot syntax for message send.
     return false;
   case StmtExprClass: {
     // Statement exprs don't logically have side effects themselves, but are
diff --git a/clang/test/SemaObjC/unused.m b/clang/test/SemaObjC/unused.m
index 44d31ab7ec75..ce77cf1b5f56 100644
--- a/clang/test/SemaObjC/unused.m
+++ b/clang/test/SemaObjC/unused.m
@@ -25,8 +25,7 @@ int test1(void) {
 @end
 
 void test2() {
-  // No unused warning: rdar://7126285
-  @"pointless example call for test purposes".length;
+  @"pointless example call for test purposes".length; // expected-warning {{expression result unused}}
 }