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SLPVectorizer: Strength reduce SmallVectors to ArrayRefs.

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Avoids a couple of copies and allows more flexibility in the clients.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179935 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer
2013-04-20 09:49:10 +00:00
parent cd949714eb
commit 6fe5cc49d8
3 changed files with 28 additions and 30 deletions
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8
lib/Transforms/Vectorize/SLPVectorizer.cpp
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@ -128,7 +128,7 @@ private:
bool tryToVectorizePair(Value *A, Value *B, BoUpSLP &R);
/// \brief Try to vectorize a list of operands.
bool tryToVectorizeList(BoUpSLP::ValueList &VL, BoUpSLP &R);
bool tryToVectorizeList(ArrayRef<Value *> VL, BoUpSLP &R);
/// \brief Try to vectorize a chain that may start at the operands of \V;
bool tryToVectorize(BinaryOperator *V, BoUpSLP &R);
@ -174,13 +174,11 @@ unsigned SLPVectorizer::collectStores(BasicBlock *BB, BoUpSLP &R) {
bool SLPVectorizer::tryToVectorizePair(Value *A, Value *B, BoUpSLP &R) {
if (!A || !B) return false;
BoUpSLP::ValueList VL;
VL.push_back(A);
VL.push_back(B);
Value *VL[] = { A, B };
return tryToVectorizeList(VL, R);
}
bool SLPVectorizer::tryToVectorizeList(BoUpSLP::ValueList &VL, BoUpSLP &R) {
bool SLPVectorizer::tryToVectorizeList(ArrayRef<Value *> VL, BoUpSLP &R) {
DEBUG(dbgs()<<"SLP: Vectorizing a list of length = " << VL.size() << ".\n");
int Cost = R.getTreeCost(VL);
int ExtrCost = R.getScalarizationCost(VL);