From: Chris Lattner <sabre@nondot.org>
Date: Mon, 23 Jul 2007 05:18:42 +0000 (+0000)
Subject: If a token doesn't need cleaning, we can get its first character
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=b19f5e8415223940c014187d45e75ef4aeff7678;p=clang

If a token doesn't need cleaning, we can get its first character
without having to get the whole token.  This speeds up -E on
447.dealII by 1.8%


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@40420 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/Driver/PrintPreprocessedOutput.cpp b/Driver/PrintPreprocessedOutput.cpp
index 706247877c..cb8bfec3c4 100644
--- a/Driver/PrintPreprocessedOutput.cpp
+++ b/Driver/PrintPreprocessedOutput.cpp
@@ -332,6 +332,10 @@ bool PrintPPOutputPPCallbacks::AvoidConcat(const Token &PrevTok,
   if (IdentifierInfo *II = Tok.getIdentifierInfo()) {
     // Avoid spelling identifiers, the most common form of token.
     FirstChar = II->getName()[0];
+  } else if (!Tok.needsCleaning()) {
+    SourceManager &SrcMgr = PP.getSourceManager();
+    FirstChar =
+      *SrcMgr.getCharacterData(SrcMgr.getPhysicalLoc(Tok.getLocation()));
   } else if (Tok.getLength() < 256) {
     const char *TokPtr = Buffer;
     PP.getSpelling(Tok, TokPtr);