-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.

llvm-svn: 110868

1 files changed, 3 insertions, 4 deletions

diff --git a/clang/lib/Basic/IdentifierTable.cpp b/clang/lib/Basic/IdentifierTable.cpp
index 1f0c52bdc19..c7b16c99c96 100644
--- a/clang/lib/Basic/IdentifierTable.cpp
+++ b/clang/lib/Basic/IdentifierTable.cpp
@@ -35,6 +35,7 @@ IdentifierInfo::IdentifierInfo() {
   IsCPPOperatorKeyword = false;
   NeedsHandleIdentifier = false;
   IsFromPCH = false;
+  RevertedTokenID = false;
   FETokenInfo = 0;
   Entry = 0;
 }
@@ -101,8 +102,7 @@ static void AddKeyword(llvm::StringRef Keyword,
   // Don't add this keyword if disabled in this language.
   if (AddResult == 0) return;
 
-  IdentifierInfo &Info = Table.get(Keyword);
-  Info.setTokenID(TokenCode);
+  IdentifierInfo &Info = Table.get(Keyword, TokenCode);
   Info.setIsExtensionToken(AddResult == 1);
 }
 
@@ -111,8 +111,7 @@ static void AddKeyword(llvm::StringRef Keyword,
 static void AddCXXOperatorKeyword(llvm::StringRef Keyword,
                                   tok::TokenKind TokenCode,
                                   IdentifierTable &Table) {
-  IdentifierInfo &Info = Table.get(Keyword);
-  Info.setTokenID(TokenCode);
+  IdentifierInfo &Info = Table.get(Keyword, TokenCode);
   Info.setIsCPlusPlusOperatorKeyword();
 }