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| author | Michael Kuperstein <mkuper@google.com> | 2016-12-19 22:47:52 +0000 |
|---|---|---|
| committer | Michael Kuperstein <mkuper@google.com> | 2016-12-19 22:47:52 +0000 |
| commit | fb7dd86fd667fa24dfb2bc2bb323d976058816e8 (patch) | |
| tree | 6a91e58ce9cf94ca15161a3eac63f1df99c8f1ff /llvm/lib/Transforms/Vectorize/LoopVectorize.cpp | |
| parent | 281139c159cc26a6e7aadcab25e607ea43aaae65 (diff) | |
| download | bcm5719-llvm-fb7dd86fd667fa24dfb2bc2bb323d976058816e8.tar.gz bcm5719-llvm-fb7dd86fd667fa24dfb2bc2bb323d976058816e8.zip | |
[LV] Sink tripcount query to where it's actually used. NFC.
llvm-svn: 290142
Diffstat (limited to 'llvm/lib/Transforms/Vectorize/LoopVectorize.cpp')
| -rw-r--r-- | llvm/lib/Transforms/Vectorize/LoopVectorize.cpp | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp index 70269ed61f5..8cde0c4cd60 100644 --- a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp +++ b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp @@ -6089,10 +6089,6 @@ LoopVectorizationCostModel::selectVectorizationFactor(bool OptForSize) { return Factor; } - // Find the trip count. - unsigned TC = PSE.getSE()->getSmallConstantTripCount(TheLoop); - DEBUG(dbgs() << "LV: Found trip count: " << TC << '\n'); - MinBWs = computeMinimumValueSizes(TheLoop->getBlocks(), *DB, &TTI); unsigned SmallestType, WidestType; std::tie(SmallestType, WidestType) = getSmallestAndWidestTypes(); @@ -6150,7 +6146,10 @@ LoopVectorizationCostModel::selectVectorizationFactor(bool OptForSize) { // If we optimize the program for size, avoid creating the tail loop. if (OptForSize) { - // If we are unable to calculate the trip count then don't try to vectorize. + unsigned TC = PSE.getSE()->getSmallConstantTripCount(TheLoop); + DEBUG(dbgs() << "LV: Found trip count: " << TC << '\n'); + + // If we don't know the precise trip count, don't try to vectorize. if (TC < 2) { ORE->emit( createMissedAnalysis("UnknownLoopCountComplexCFG") |
