Suppress the ASan reports in swizzle_for_size()

BUG=139772
TBR=kbr

Review URL: https://chromiumcodereview.appspot.com/10843004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@149172 0039d316-1c4b-4281-b951-d872f2087c98

third_party/mesa/MesaLib/src/mesa/program/ir_to_mesa.cpp

@@ -56,6 +56,11 @@ extern "C" {
 #include "program/prog_parameter.h"
 }
 
+#if defined(ADDRESS_SANITIZER)
+// Suppress AddressSanitizer reports about OOB reads in swizzle_for_size().
+// See also http://crbug.com/139772.
+__attribute__((no_address_safety_analysis))
+#endif
 static int swizzle_for_size(int size);
 
 /**

third_party/mesa/README.chromium

@@ -101,3 +101,8 @@ Later modifications (see chromium.patch):
 
 - Merged the replacement of memcpy() with memmove() in SHIFT_ARRAY declared in
   s_span.c (commit a44d715d2b19dc2f8f48b01144cc38e4e2c5015a)
+
+- Suppressed the OOB read reported by AddressSanitizer in swizzle_for_size from
+  ir_to_mesa.cpp
+  https://code.google.com/p/chromium/issues/detail?id=139772
+  https://bugs.freedesktop.org/show_bug.cgi?id=52996