[X86] Use __m128_u for _mm_loadu_ps after r353555

Add secondary triple to existing SSE test for it.  I audited other uses
of __attribute__((__packed__)) in the intrinsic headers, and this seemed
to be the only missing one.

llvm-svn: 353878

clang/lib/Headers/xmmintrin.h

@@ -1754,7 +1754,7 @@ static __inline__ __m128 __DEFAULT_FN_ATTRS
 _mm_loadu_ps(const float *__p)
 {
   struct __loadu_ps {
-    __m128 __v;
+    __m128_u __v;
   } __attribute__((__packed__, __may_alias__));
   return ((struct __loadu_ps*)__p)->__v;
 }

clang/test/CodeGen/sse-builtins.c

@@ -1,4 +1,5 @@
 // RUN: %clang_cc1 -ffreestanding %s -triple=x86_64-apple-darwin -target-feature +sse -emit-llvm -o - -Wall -Werror | FileCheck %s
+// RUN: %clang_cc1 -fms-extensions -fms-compatibility -ffreestanding %s -triple=x86_64-windows-msvc -target-feature +sse -emit-llvm -o - -Wall -Werror | FileCheck %s
 
 
 #include <immintrin.h>