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Speedup bitcode writer. Do not walk all values for all functions to emit function local metadata. In one testcase, probably worst case scenario, the 70x speed up is seen.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105360 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel
2010-06-02 23:05:04 +00:00
parent 05c68374c1
commit 6209869f83
3 changed files with 16 additions and 9 deletions
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7
lib/Bitcode/Writer/BitcodeWriter.cpp
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@@ -577,10 +577,9 @@ static void WriteFunctionLocalMetadata(const Function &F,
BitstreamWriter &Stream) {
bool StartedMetadataBlock = false;
SmallVector<uint64_t, 64> Record;
const ValueEnumerator::ValueList &Vals = VE.getMDValues();
const SmallVector<const MDNode *, 8> &Vals = VE.getFunctionLocalMDValues();
for (unsigned i = 0, e = Vals.size(); i != e; ++i)
if (const MDNode *N = dyn_cast<MDNode>(Vals[i].first))
if (const MDNode *N = Vals[i])
if (N->isFunctionLocal() && N->getFunction() == &F) {
if (!StartedMetadataBlock) {
Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
@@ -588,7 +587,7 @@ static void WriteFunctionLocalMetadata(const Function &F,
}
WriteMDNode(N, VE, Stream, Record);
}
if (StartedMetadataBlock)
Stream.ExitBlock();
}