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Replace std::vector -> SmallVector in BBVectorize

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For now, this uses 8 on-stack elements. I'll need to do some profiling
to see if this is the best number.

Pointed out by Jakob in post-commit review.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167966 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Hal Finkel 2012-11-14 19:53:27 +00:00
parent c7d180257c
commit 97d19ebe5b
1 changed files with 4 additions and 4 deletions
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8
lib/Transforms/Vectorize/BBVectorize.cpp
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@ -1485,7 +1485,7 @@ namespace {
PrunedTree.insert(QTop.first);
// Visit each child, pruning as necessary...
std::vector<ValuePairWithDepth> BestChildren;
SmallVector<ValuePairWithDepth, 8> BestChildren;
VPPIteratorPair QTopRange = ConnectedPairs.equal_range(QTop.first);
for (std::multimap<ValuePair, ValuePair>::iterator K = QTopRange.first;
K != QTopRange.second; ++K) {
@ -1517,7 +1517,7 @@ namespace {
DenseSet<ValuePair> CurrentPairs;
bool CanAdd = true;
for (std::vector<ValuePairWithDepth>::iterator C2
for (SmallVector<ValuePairWithDepth, 8>::iterator C2
= BestChildren.begin(), E2 = BestChildren.end();
C2 != E2; ++C2) {
if (C2->first.first == C->first.first ||
@ -1602,7 +1602,7 @@ namespace {
// to an already-selected child. Check for this here, and if a
// conflict is found, then remove the previously-selected child
// before adding this one in its place.
for (std::vector<ValuePairWithDepth>::iterator C2
for (SmallVector<ValuePairWithDepth, 8>::iterator C2
= BestChildren.begin(); C2 != BestChildren.end();) {
if (C2->first.first == C->first.first ||
C2->first.first == C->first.second ||
@ -1617,7 +1617,7 @@ namespace {
BestChildren.push_back(ValuePairWithDepth(C->first, C->second));
}
for (std::vector<ValuePairWithDepth>::iterator C
for (SmallVector<ValuePairWithDepth, 8>::iterator C
= BestChildren.begin(), E2 = BestChildren.end();
C != E2; ++C) {
size_t DepthF = getDepthFactor(C->first.first);