-Make TokenID of IdentifierInfo read-only, remove setTokenID().
-There are 2 instances that change the TokenID for GNU libstdc++ 4.2 compatibility.
  To handler those cases introduce a RevertedTokenID bitfield, RevertTokenIDToIdentifier() and hasRevertedTokenIDToIdentifier() methods.
  Store the bitfield in PCH.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@110868 91177308-0d34-0410-b5e6-96231b3b80d8
7 files changed