Implement the _Pragma-style of pragma handling, implementing
test/Preprocessor/_Pragma-poison.c.

This unifies the MacroStack and IncludeStack together into IncludeMacroStack.

llvm-svn: 38606
3 files changed
tree: 3bc66d29865051be076ff7ae93f190776583df47
  1. clang/
  2. llvm/
  3. stacker/