[cfe-commits] r61168 - /cfe/trunk/include/clang/Lex/PTHLexer.h

[Ted Kremenek]

Author: kremenek
Date: Wed Dec 17 17:08:31 2008
New Revision: 61168

URL: http://llvm.org/viewvc/llvm-project?rev=61168&view=rev
Log:
PTHLexer::isNextPPTokenLParen() no longer calls GetToken() and just reads the token kind from the token data buffer.  This results in a minor speedup and reduces the dependency on GetToken().

Modified:
    cfe/trunk/include/clang/Lex/PTHLexer.h

Modified: cfe/trunk/include/clang/Lex/PTHLexer.h
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Lex/PTHLexer.h?rev=61168&r1=61167&r2=61168&view=diff

==============================================================================
--- cfe/trunk/include/clang/Lex/PTHLexer.h (original)
+++ cfe/trunk/include/clang/Lex/PTHLexer.h Wed Dec 17 17:08:31 2008
@@ -76,8 +76,13 @@
   /// tok::l_paren token, 0 if it is something else and 2 if there are no more
   /// tokens controlled by this lexer.
   unsigned isNextPPTokenLParen() {
-    return AtLastToken() ? 2 : GetToken().is(tok::l_paren);
-  }
+    // isNextPPTokenLParen is not on the hot path, and all we care about is
+    // whether or not we are at a token with kind tok::eof or tok::l_paren.
+    // Just read the first byte from the current token pointer to determine
+    // its kind.
+    tok::TokenKind x = (tok::TokenKind) (uint8_t) *CurPtr;
+    return x == tok::eof ? 2 : x == tok::l_paren;
+  }    
 
   /// IndirectLex - An indirect call to 'Lex' that can be invoked via
   ///  the PreprocessorLexer interface.