Preprocessor: Allocate MacroInfo objects using a BumpPtrAllocator instead using new/delete.  This speeds up -Eonly on Cocoa.h using the regular lexer by 1.8% and the PTHLexer by 3%.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@61042 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed