Vendor import of clang release_32 branch r168974 (effectively, 3.2 RC2):

http://llvm.org/svn/llvm-project/cfe/branches/release_32@168974

1 files changed, 11 insertions, 0 deletions

diff --git a/test/Sema/unused-expr.c b/test/Sema/unused-expr.c
index 056d09a..aa81febd 100644
--- a/test/Sema/unused-expr.c
+++ b/test/Sema/unused-expr.c
@@ -122,3 +122,14 @@ void f(int i, ...) {
 
 // PR8371
 int fn5() __attribute__ ((__const));
+
+// OpenSSL has some macros like this; we shouldn't warn on the cast.
+#define M1(a, b) (long)foo((a), (b))
+// But, we should still warn on other subexpressions of casts in macros.
+#define M2 (long)0;
+void t11(int i, int j) {
+  M1(i, j);  // no warning
+  M2;  // expected-warning {{expression result unused}}
+}
+#undef M1
+#undef M2