Reduce initial Sema memory consumption by 400KB. By Elisavet Sakellari.

llvm-svn: 259637

clang/lib/Sema/SemaOpenMP.cpp

@@ -123,7 +123,7 @@ private:
           CancelRegion(false), AssociatedLoops(1), InnerTeamsRegionLoc() {}
   };
 
-  typedef SmallVector<SharingMapTy, 64> StackTy;
+  typedef SmallVector<SharingMapTy, 4> StackTy;
 
   /// \brief Stack of used declaration and their data-sharing attributes.
   StackTy Stack;