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Actually recycle SDNode allocations. SelectionDAG is using

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RecyclingAllocator, but this change is needed for the nodes
to actually be recycled. This cuts SelectionDAG's memory
usage high-water-mark in half in some cases.

llvm-svn: 55351
This commit is contained in:
Dan Gohman 2008-08-26 01:44:34 +00:00
parent 5438048f54
commit 815d50b9e6
1 changed files with 6 additions and 2 deletions
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8
lib/CodeGen/SelectionDAG/SelectionDAG.cpp
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@ -523,7 +523,7 @@ void SelectionDAG::RemoveDeadNodes(SmallVectorImpl<SDNode *> &DeadNodes,
N->NumOperands = 0;
// Finally, remove N itself.
AllNodes.remove(N);
NodeAllocator.Deallocate(AllNodes.remove(N));
}
}
@ -551,7 +551,8 @@ void SelectionDAG::DeleteNodeNotInCSEMaps(SDNode *N) {
if (N->OperandsNeedDelete)
delete[] N->OperandList;
AllNodes.remove(N);
assert(N != AllNodes.begin());
NodeAllocator.Deallocate(AllNodes.remove(N));
}
/// RemoveNodeFromCSEMaps - Take the specified node out of the CSE map that
@ -777,11 +778,14 @@ SelectionDAG::~SelectionDAG() {
}
void SelectionDAG::allnodes_clear() {
assert(&*AllNodes.begin() == &EntryNode);
AllNodes.remove(AllNodes.begin());
while (!AllNodes.empty()) {
SDNode *N = AllNodes.remove(AllNodes.begin());
N->SetNextInBucket(0);
if (N->OperandsNeedDelete)
delete [] N->OperandList;
NodeAllocator.Deallocate(N);
}
}