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Use a DenseMap instead of an std::map, speeding up the testcase in PR2368 by about a third. 

llvm-svn: 51565
This commit is contained in:
Owen Anderson 2008-05-26 10:07:43 +00:00
parent 2e8c82893b
commit d3f21d165f
1 changed files with 3 additions and 3 deletions
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6
llvm/lib/Transforms/Utils/LCSSA.cpp
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@ -87,7 +87,7 @@ namespace {
SetVector<Instruction*> &AffectedValues);
Value *GetValueForBlock(DomTreeNode *BB, Instruction *OrigInst,
std::map<DomTreeNode*, Value*> &Phis);
DenseMap<DomTreeNode*, Value*> &Phis);
/// inLoop - returns true if the given block is within the current loop
bool inLoop(BasicBlock* B) {
@ -143,7 +143,7 @@ void LCSSA::ProcessInstruction(Instruction *Instr,
++NumLCSSA; // We are applying the transformation
// Keep track of the blocks that have the value available already.
std::map<DomTreeNode*, Value*> Phis;
DenseMap<DomTreeNode*, Value*> Phis;
DomTreeNode *InstrNode = DT->getNode(Instr->getParent());
@ -247,7 +247,7 @@ void LCSSA::getLoopValuesUsedOutsideLoop(Loop *L,
/// GetValueForBlock - Get the value to use within the specified basic block.
/// available values are in Phis.
Value *LCSSA::GetValueForBlock(DomTreeNode *BB, Instruction *OrigInst,
std::map<DomTreeNode*, Value*> &Phis) {
DenseMap<DomTreeNode*, Value*> &Phis) {
// If there is no dominator info for this BB, it is unreachable.
if (BB == 0)
return UndefValue::get(OrigInst->getType());