[_mm_prefetch] Returning previously deleted comment.

No functional change.  It's unclear if the word FIXME is relevant given
that the macro behaves as intended.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@201920 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Headers/xmmintrin.h b/lib/Headers/xmmintrin.h
index 9a2841fc59bbec782400bd5e3f6175623d649c70..c8765a70f8bc112685b751cf840b2041c23207cc 100644 (file)
--- a/lib/Headers/xmmintrin.h
+++ b/lib/Headers/xmmintrin.h
@@ -673,6 +673,9 @@ _mm_storer_ps(float *__p, __m128 __a)
 #define _MM_HINT_NTA 0
 
 #ifndef _MSC_VER
+/* FIXME: We have to #define this because "sel" must be a constant integer, and
+   Sema doesn't do any form of constant propagation yet. */
+
 #define _mm_prefetch(a, sel) (__builtin_prefetch((void *)(a), 0, (sel)))
 #endif