1 files changed, 19 insertions, 0 deletions
diff --git a/test/Sema/attr-warn_unused_result.c b/test/Sema/attr-warn_unused_result.c
new file mode 100644
index 0000000..b4ef1bb
--- /dev/null
+++ b/test/Sema/attr-warn_unused_result.c
@@ -0,0 +1,19 @@
+// RUN: clang-cc %s -fsyntax-only -verify
+// rdar://6587766
+
+int fn1() __attribute__ ((warn_unused_result));
+int fn2() __attribute__ ((pure));
+int fn3() __attribute__ ((const));
+
+int foo() {
+  if (fn1() < 0 || fn2(2,1) < 0 || fn3(2) < 0)  // no warnings
+    return -1;
+  
+  fn1();  // expected-warning {{expression result unused}}
+  fn2(92, 21);  // expected-warning {{expression result unused}}
+  fn3(42);  // expected-warning {{expression result unused}}
+  return 0;
+}
+
+int bar __attribute__ ((warn_unused_result)); // expected-warning {{warning: 'warn_unused_result' attribute only applies to function types}}
+