Unrevert r155951, reverted in r155962, with two changes:
 * Work around build failures due to gcc 4.2 bugs.
 * Remove BodyIndexer::TraverseCXXOperatorCallExpr, which was not being called
   prior to this change, and whose presence disables a RecursiveASTVisitor
   stack space optimization after this change.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@155969 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed