in Preprocessor::AdvanceToTokenCharacter, don't actually bother

creating a whole lexer when we just want one static method.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@62420 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Lex/Preprocessor.cpp b/lib/Lex/Preprocessor.cpp
index ff84b0abf36f75bb046605ba77b8326d71809dbf..54c17488c85f0d794bffa29c655ac65e68f2c3ec 100644 (file)
--- a/lib/Lex/Preprocessor.cpp
+++ b/lib/Lex/Preprocessor.cpp
@@ -320,18 +320,16 @@ SourceLocation Preprocessor::AdvanceToTokenCharacter(SourceLocation TokStart,
   while (CharNo && Lexer::isObviouslySimpleCharacter(*TokPtr))
     ++TokPtr, --CharNo, ++PhysOffset;
   
-  // If we have a character that may be a trigraph or escaped newline, create a
+  // If we have a character that may be a trigraph or escaped newline, use a
   // lexer to parse it correctly.
   if (CharNo != 0) {
-    // Create a lexer starting at this token position.
-    Lexer TheLexer(TokStart, *this, TokPtr);
-    Token Tok;
     // Skip over characters the remaining characters.
-    const char *TokStartPtr = TokPtr;
-    for (; CharNo; --CharNo)
-      TheLexer.getAndAdvanceChar(TokPtr, Tok);
-    
-    PhysOffset += TokPtr-TokStartPtr;
+    for (; CharNo; --CharNo) {
+      unsigned Size;
+      Lexer::getCharAndSizeNoWarn(TokPtr, Size, Features);
+      TokPtr += Size;
+      PhysOffset += Size;
+    }
   }
   
   return TokStart.getFileLocWithOffset(PhysOffset);