Vendor import of clang release_34 branch r197841 (effectively, 3.4 RC3):

https://llvm.org/svn/llvm-project/cfe/branches/release_34@197841

1 files changed, 20 insertions, 0 deletions

diff --git a/test/SemaCXX/warn-unused-attribute.cpp b/test/SemaCXX/warn-unused-attribute.cpp
new file mode 100644
index 0000000..72f96ee
--- /dev/null
+++ b/test/SemaCXX/warn-unused-attribute.cpp
@@ -0,0 +1,20 @@
+// RUN: %clang_cc1 -fsyntax-only -Wunused-variable -verify %s
+struct __attribute__((warn_unused)) Test
+{
+    Test();
+    ~Test();
+    void use();
+};
+
+struct TestNormal
+{
+    TestNormal();
+};
+
+int main()
+{
+   Test unused;         // expected-warning {{unused variable 'unused'}}
+   Test used;
+   TestNormal normal;
+   used.use();
+}