make the token lexer allocate its temporary token buffers for
preexpanded macro arguments from the preprocessor's bump pointer.
This reduces # mallocs from 12444 to 11792.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@66025 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed