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SLP Vectorizer: do not search for store-chains that are wider than the vector-register size. 

llvm-svn: 184527
This commit is contained in:
Nadav Rotem 2013-06-21 04:18:13 +00:00
parent a02291010d
commit e1713e5fcf
1 changed files with 4 additions and 2 deletions
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6
llvm/lib/Transforms/Vectorize/VecUtils.cpp
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@ -141,9 +141,11 @@ bool BoUpSLP::vectorizeStoreChain(ArrayRef<Value *> Chain, int CostThreshold) {
} }
} }
if (Changed) if (Changed || ChainLen > VF)
return true; return Changed;
// Handle short chains. This helps us catch types such as <3 x float> that
// are smaller than vector size.
int Cost = getTreeCost(Chain); int Cost = getTreeCost(Chain);
if (Cost < CostThreshold) { if (Cost < CostThreshold) {
DEBUG(dbgs() << "SLP: Found store chain cost = " << Cost DEBUG(dbgs() << "SLP: Found store chain cost = " << Cost