Merging r258318:
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r258318 | sgundapa | 2016-01-20 07:41:30 -0800 (Wed, 20 Jan 2016) | 2 lines

Fix the error in non-asserts Release mode build. NFC

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llvm-svn: 259541
diff --git a/polly/lib/Analysis/ScopInfo.cpp b/polly/lib/Analysis/ScopInfo.cpp
index ec16088..3e0573bd 100644
--- a/polly/lib/Analysis/ScopInfo.cpp
+++ b/polly/lib/Analysis/ScopInfo.cpp
@@ -3406,6 +3406,8 @@
 
   auto Res = isl_union_set_foreach_set(USet, &mapToDimension_AddSet, &Data);
 
+  (void)Res;
+
   assert(Res == isl_stat_ok);
 
   isl_union_set_free(USet);