1 files changed, 44 insertions, 0 deletions
diff --git a/clang/test/SemaCXX/warn-unused-result.cpp b/clang/test/SemaCXX/warn-unused-result.cpp
new file mode 100644
index 0000000..d14fdf9
--- /dev/null
+++ b/clang/test/SemaCXX/warn-unused-result.cpp
@@ -0,0 +1,44 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+
+int f() __attribute__((warn_unused_result));
+
+struct S {
+  void t() const;
+};
+S g1() __attribute__((warn_unused_result));
+S *g2() __attribute__((warn_unused_result));
+S &g3() __attribute__((warn_unused_result));
+
+void test() {
+  f(); // expected-warning {{ignoring return value}}
+  g1(); // expected-warning {{ignoring return value}}
+  g2(); // expected-warning {{ignoring return value}}
+  g3(); // expected-warning {{ignoring return value}}
+
+  (void)f();
+  (void)g1();
+  (void)g2();
+  (void)g3();
+
+  if (f() == 0) return;
+
+  g1().t();
+  g2()->t();
+  g3().t();
+
+  int i = f();
+  S s1 = g1();
+  S *s2 = g2();
+  S &s3 = g3();
+  const S &s4 = g1();
+}
+
+struct X {
+ int foo() __attribute__((warn_unused_result));
+};
+
+void bah() {
+  X x, *x2;
+  x.foo(); // expected-warning {{ignoring return value}}
+  x2->foo(); // expected-warning {{ignoring return value}}
+}