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Privatize the MDNode uniquing table.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76126 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson
2009-07-16 23:44:30 +00:00
parent b8e9ac834a
commit ce032b483c
6 changed files with 49 additions and 33 deletions
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31
lib/VMCore/Constants.cpp
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@@ -1443,8 +1443,6 @@ void MDString::destroyConstant() {
//---- MDNode::get() implementation
//
static ManagedStatic<FoldingSet<MDNode> > MDNodeSet;
MDNode::MDNode(Value*const* Vals, unsigned NumVals)
: Constant(Type::MetadataTy, MDNodeVal, 0, 0) {
for (unsigned i = 0; i != NumVals; ++i)
@@ -1456,32 +1454,8 @@ void MDNode::Profile(FoldingSetNodeID &ID) const {
ID.AddPointer(*I);
}
MDNode *MDNode::get(Value*const* Vals, unsigned NumVals) {
FoldingSetNodeID ID;
for (unsigned i = 0; i != NumVals; ++i)
ID.AddPointer(Vals[i]);
ConstantsLock->reader_acquire();
void *InsertPoint;
MDNode *N = MDNodeSet->FindNodeOrInsertPos(ID, InsertPoint);
ConstantsLock->reader_release();
if (!N) {
sys::SmartScopedWriter<true> Writer(*ConstantsLock);
N = MDNodeSet->FindNodeOrInsertPos(ID, InsertPoint);
if (!N) {
// InsertPoint will have been set by the FindNodeOrInsertPos call.
N = new(0) MDNode(Vals, NumVals);
MDNodeSet->InsertNode(N, InsertPoint);
}
}
return N;
}
void MDNode::destroyConstant() {
sys::SmartScopedWriter<true> Writer(*ConstantsLock);
MDNodeSet->RemoveNode(this);
getType()->getContext().erase(this);
destroyConstantImpl();
}
@@ -2519,7 +2493,8 @@ void MDNode::replaceElement(Value *From, Value *To) {
Values.push_back(Val);
}
MDNode *Replacement = MDNode::get(&Values[0], Values.size());
MDNode *Replacement =
getType()->getContext().getMDNode(&Values[0], Values.size());
assert(Replacement != this && "I didn't contain From!");
uncheckedReplaceAllUsesWith(Replacement);