A minor tweak to the new volatile lvalue warning: don't warn on "(void)x", where "x" refers to a local variable. This should silence a useless warning in compiler-rt and other places.

llvm-svn: 157414

1 files changed, 2 insertions, 0 deletions

diff --git a/clang/test/SemaCXX/unused.cpp b/clang/test/SemaCXX/unused.cpp
index b330d6ecf46..54898c828ec 100644
--- a/clang/test/SemaCXX/unused.cpp
+++ b/clang/test/SemaCXX/unused.cpp
@@ -30,5 +30,7 @@ namespace derefvolatile {
   void f(volatile char* x) {
     *x; // expected-warning {{expression result unused; assign into a variable to force a volatile load}}
     (void)*x; // expected-warning {{expression result unused; assign into a variable to force a volatile load}}
+    volatile char y = 10;
+    (void)y; // don't warn here, because it's a common pattern.
   }
 }