r278812 - Reduce the number of allocations required for AST attributes. In test cases, the max resident memory changed from 65760k to 64476k which is 1.9% improvement. Allocations in grow_pod changed from 8847 to 4872 according to tcmalloc heap profiler. Overall running time remained the same.

[Aaron Ballman via cfe-commits]

Author: aaronballman
Date: Tue Aug 16 09:48:39 2016
New Revision: 278812

URL: http://llvm.org/viewvc/llvm-project?rev=278812&view=rev
Log:
Reduce the number of allocations required for AST attributes. In test cases, the max resident memory changed from 65760k to 64476k which is 1.9% improvement. Allocations in grow_pod changed from 8847 to 4872 according to tcmalloc heap profiler. Overall running time remained the same.

Patch by Eugene Kosov

Modified:
    cfe/trunk/include/clang/AST/AttrIterator.h

Modified: cfe/trunk/include/clang/AST/AttrIterator.h
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/AST/AttrIterator.h?rev=278812&r1=278811&r2=278812&view=diff
==============================================================================
--- cfe/trunk/include/clang/AST/AttrIterator.h (original)
+++ cfe/trunk/include/clang/AST/AttrIterator.h Tue Aug 16 09:48:39 2016
@@ -39,8 +39,7 @@ void operator delete[](void *Ptr, const
 namespace clang {
 
 /// AttrVec - A vector of Attr, which is how they are stored on the AST.
-typedef SmallVector<Attr*, 2> AttrVec;
-typedef SmallVector<const Attr*, 2> ConstAttrVec;
+typedef SmallVector<Attr *, 4> AttrVec;
 
 /// specific_attr_iterator - Iterates over a subrange of an AttrVec, only
 /// providing attributes that are of a specific type.