From: Sanjay Patel <spatel@rotateright.com>
Date: Thu, 12 Mar 2015 17:23:46 +0000 (+0000)
Subject: Replace second (hopefully unused) access of macro input argument with zero vector... 
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=7955a3766b0876787e03fa2aaf61b5973114eff0;p=clang

Replace second (hopefully unused) access of macro input argument with zero vector to be safer.

Suggested by Craig Topper in D8275.

This is a follow-on to r232052.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@232061 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Headers/avxintrin.h b/lib/Headers/avxintrin.h
index f7bda6b360..f30a5adedb 100644
--- a/lib/Headers/avxintrin.h
+++ b/lib/Headers/avxintrin.h
@@ -1181,7 +1181,7 @@ _mm256_castsi128_si256(__m128i __a)
 #define _mm256_extractf128_ps(V, M) __extension__ ({ \
   (__m128)__builtin_shufflevector( \
     (__v8sf)(V), \
-    (__v8sf)(V), \
+    (__v8sf)(_mm256_setzero_ps()), \
     (((M) & 1) ? 4 : 0), \
     (((M) & 1) ? 5 : 1), \
     (((M) & 1) ? 6 : 2), \
@@ -1190,14 +1190,14 @@ _mm256_castsi128_si256(__m128i __a)
 #define _mm256_extractf128_pd(V, M) __extension__ ({ \
   (__m128d)__builtin_shufflevector( \
     (__v4df)(V), \
-    (__v4df)(V), \
+    (__v4df)(_mm256_setzero_pd()), \
     (((M) & 1) ? 2 : 0), \
     (((M) & 1) ? 3 : 1) );})
 
 #define _mm256_extractf128_si256(V, M) __extension__ ({ \
   (__m128i)__builtin_shufflevector( \
     (__v4di)(V), \
-    (__v4di)(V), \
+    (__v4di)(_mm256_setzero_si256()), \
     (((M) & 1) ? 2 : 0), \
     (((M) & 1) ? 3 : 1) );})