expect avx2 compiler support means one of the avx2 functions exists.

BUG=none
TESTED=try bots
R=bcornell@google.com

Review URL: https://webrtc-codereview.appspot.com/22299004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1076 16f28f9a-4ce2-e073-06de-1de4eb20be90

unit_test/cpu_test.cc

@@ -13,6 +13,7 @@
 
 #include "libyuv/basic_types.h"
 #include "libyuv/cpu_id.h"
+#include "libyuv/row.h"  // For HAS_ARGBSHUFFLEROW_AVX2.
 #include "libyuv/version.h"
 #include "../unit_test/unit_test.h"
 
@@ -52,11 +53,22 @@ TEST_F(libyuvTest, TestCpuHas) {
 }
 
 TEST_F(libyuvTest, TestCompilerHasAVX2) {
-#if defined(GCC_HAS_AVX2) || defined(CLANG_HAS_AVX2) || \
-    defined(VISUALC_HAS_AVX2)
+#ifdef _MSC_VER
+printf("_MSC_VER %d\n", _MSC_VER);
+#endif
+#if !defined(LIBYUV_DISABLE_X86) && (defined(GCC_HAS_AVX2) || \
+    defined(CLANG_HAS_AVX2) || defined(VISUALC_HAS_AVX2))
   printf("Has AVX2 1\n");
+  // If compiler supports AVX2, the following function is expected to exist:
+#if !defined(HAS_ARGBSHUFFLEROW_AVX2)
+  EXPECT_TRUE(0);  // HAS_ARGBSHUFFLEROW_AVX2 was expected.
+#endif
 #else
   printf("Has AVX2 0\n");
+  // If compiler does not support AVX2, the following function not expected:
+#if defined(HAS_ARGBSHUFFLEROW_AVX2)
+  EXPECT_TRUE(0);  // HAS_ARGBSHUFFLEROW_AVX2 was not expected.
+#endif
 #endif
 }