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[SLP] Add command line option for minimum tree size (NFC)

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llvm-svn: 279369
This commit is contained in:
Matthew Simpson 2016-08-20 14:10:06 +00:00
parent 09ae2d110f
commit 7199d2952c
1 changed files with 5 additions and 1 deletions
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6
lib/Transforms/Vectorize/SLPVectorizer.cpp
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@ -86,6 +86,10 @@ static cl::opt<unsigned> RecursionMaxDepth(
"slp-recursion-max-depth", cl::init(12), cl::Hidden,
cl::desc("Limit the recursion depth when building a vectorizable tree"));
static cl::opt<unsigned> MinTreeSize(
"slp-min-tree-size", cl::init(3), cl::Hidden,
cl::desc("Only vectorize small trees if they are fully vectorizable"));
// Limit the number of alias checks. The limit is chosen so that
// it has no negative effect on the llvm benchmarks.
static const unsigned AliasedCheckLimit = 10;
@ -1871,7 +1875,7 @@ int BoUpSLP::getTreeCost() {
VectorizableTree.size() << ".\n");
// We only vectorize tiny trees if it is fully vectorizable.
if (VectorizableTree.size() < 3 && !isFullyVectorizableTinyTree()) {
if (VectorizableTree.size() < MinTreeSize && !isFullyVectorizableTinyTree()) {
if (VectorizableTree.empty()) {
assert(!ExternalUses.size() && "We should not have any external users");
}