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use efficient form of getSpelling, this speeds up -dM by 16%. 

llvm-svn: 64244
This commit is contained in:
Chris Lattner 2009-02-10 22:16:03 +00:00
parent 654e47f366
commit 8ac63738b4
1 changed files with 9 additions and 1 deletions
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10
clang/Driver/PrintPreprocessedOutput.cpp
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@ -582,11 +582,19 @@ static void PrintMacroDefinition(IdentifierInfo &II, const MacroInfo &MI,
if (MI.tokens_empty() || !MI.tokens_begin()->hasLeadingSpace())
OS << ' ';
llvm::SmallVector<char, 128> SpellingBuffer;
for (MacroInfo::tokens_iterator I = MI.tokens_begin(), E = MI.tokens_end();
I != E; ++I) {
if (I->hasLeadingSpace())
OS << ' ';
OS << PP.getSpelling(*I);
// Make sure we have enough space in the spelling buffer.
if (I->getLength() < SpellingBuffer.size())
SpellingBuffer.resize(I->getLength());
const char *Buffer = &SpellingBuffer[0];
unsigned SpellingLen = PP.getSpelling(*I, Buffer);
OS.write(Buffer, SpellingLen);
}
OS << "\n";
}