Check in LLVM r95781.
diff --git a/test/SemaCXX/warn-unused-variables.cpp b/test/SemaCXX/warn-unused-variables.cpp
new file mode 100644
index 0000000..5620248
--- /dev/null
+++ b/test/SemaCXX/warn-unused-variables.cpp
@@ -0,0 +1,45 @@
+// RUN: %clang -fsyntax-only -Wunused-variable -verify %s
+
+template<typename T> void f() {
+ T t;
+ t = 17;
+}
+
+// PR5407
+struct A { A(); };
+struct B { ~B(); };
+void f() {
+ A a;
+ B b;
+}
+
+// PR5531
+namespace PR5531 {
+ struct A {
+ };
+
+ struct B {
+ B(int);
+ };
+
+ struct C {
+ ~C();
+ };
+
+ void test() {
+ A();
+ B(17);
+ C();
+ }
+}
+
+
+struct X {
+ int foo() __attribute__((warn_unused_result));
+};
+
+void bah() {
+ X x, *x2;
+ x.foo(); // expected-warning {{ignoring return value of function declared with warn_unused_result attribute}}
+ x2->foo(); // expected-warning {{ignoring return value of function declared with warn_unused_result attribute}}
+}