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implement the 'string constant' optimization. This shrinks kc.bit from

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2878544 to 2815788

llvm-svn: 36818
This commit is contained in:
Chris Lattner
2007-05-06 00:35:24 +00:00
parent e9759c29d1
commit 036d1bddf2
4 changed files with 34 additions and 12 deletions
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6
llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
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@@ -484,6 +484,12 @@ static void WriteConstants(unsigned FirstVal, unsigned LastVal,
assert (CFP->getType() == Type::DoubleTy && "Unknown FP type!");
Record.push_back(DoubleToBits((double)CFP->getValue()));
}
} else if (isa<ConstantArray>(C) && cast<ConstantArray>(C)->isString()) {
// Emit constant strings specially.
Code = bitc::CST_CODE_STRING;
for (unsigned i = 0, e = C->getNumOperands(); i != e; ++i)
Record.push_back(cast<ConstantInt>(C->getOperand(i))->getZExtValue());
} else if (isa<ConstantArray>(C) || isa<ConstantStruct>(V) ||
isa<ConstantVector>(V)) {
Code = bitc::CST_CODE_AGGREGATE;