Test case for r209489.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@209532 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Headers/xmmintrin.c b/test/Headers/xmmintrin.c
new file mode 100644 (file)
index 0000000..de51f60
--- /dev/null
+++ b/test/Headers/xmmintrin.c
@@ -0,0 +1,13 @@
+// RUN: %clang_cc1 %s -triple x86_64-apple-macosx10.9.0 -emit-llvm -o - | FileCheck %s
+
+#include <xmmintrin.h>
+
+// Make sure the last step of _mm_cvtps_pi16 converts <4 x i32> to <4 x i16> by
+// checking that clang emits PACKSSDW instead of PACKSSWB.
+
+// CHECK: define i64 @test_mm_cvtps_pi16
+// CHECK: call x86_mmx @llvm.x86.mmx.packssdw
+
+__m64 test_mm_cvtps_pi16(__m128 a) {
+  return _mm_cvtps_pi16(a);
+}