Enable/silence -Wshadow.

llvm-svn: 152325

libcxxabi/lib/buildit

@@ -28,7 +28,7 @@ then
 fi
 
 EXTRA_FLAGS="-std=c++0x -stdlib=libc++ -fstrict-aliasing -Wstrict-aliasing=2 \
-             -Wsign-conversion -Wnewline-eof"
+             -Wsign-conversion -Wshadow -Wnewline-eof"
 
 case $TRIPLE in
   *-apple-*)

libcxxabi/src/cxa_handlers.cpp

@@ -177,12 +177,9 @@ terminate() _NOEXCEPT
                 (unwind_exception->exception_class & get_vendor_and_language) ==
                                (kOurExceptionClass & get_vendor_and_language);
             if (native_exception)
-            {
-                __cxa_exception* exception_header = (__cxa_exception*)(unwind_exception+1) - 1;
                 __terminate(exception_header->terminateHandler);
         }
     }
-    }
     __terminate(get_terminate());
 }