Suppress useless -Wshadow warning when using _mm* macros from emmintrin.h

Fixes <rdar://problem/10679282>.

I'm not completely satisfied with this patch.  Sprinkling "diagnostic ignored"
_Pragmas throughout this file is gross, but I couldn't suppress
it for the entire file.

llvm-svn: 192143

1 files changed, 10 insertions, 0 deletions

diff --git a/clang/test/Sema/warn-shadow.c b/clang/test/Sema/warn-shadow.c
index 32aca8d612b..a9979ff9d79 100644
--- a/clang/test/Sema/warn-shadow.c
+++ b/clang/test/Sema/warn-shadow.c
@@ -1,5 +1,7 @@
 // RUN: %clang_cc1 -verify -fsyntax-only -fblocks -Wshadow %s
 
+#include <emmintrin.h>
+
 int i;          // expected-note 3 {{previous declaration is here}}
 
 void foo() {
@@ -59,3 +61,11 @@ void rdar8883302() {
 void test8() {
   int bob; // expected-warning {{declaration shadows a variable in the global scope}}
 }
+
+// Test that using two macros from emmintrin do not cause a
+// useless -Wshadow warning.
+void rdar10679282() {
+  __m128i qf = _mm_setzero_si128();
+  qf = _mm_slli_si128(_mm_add_epi64(qf, _mm_srli_si128(qf, 8)), 8); // no-warning
+  (void) qf;
+}