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Do not use SmallVector to store MDNode elements.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84784 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2009-10-21 21:25:09 +00:00
parent a55d33d96e
commit 028fa77d56
4 changed files with 25 additions and 34 deletions
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18
include/llvm/Metadata.h
View File

@ -110,6 +110,7 @@ class MDNode : public MetadataBase, public FoldingSetNode {
// Use CallbackVH to hold MDNOde elements.
struct ElementVH : public CallbackVH {
MDNode *Parent;
ElementVH() {}
ElementVH(Value *V, MDNode *P) : CallbackVH(V), Parent(P) {}
~ElementVH() {}
@ -124,7 +125,8 @@ class MDNode : public MetadataBase, public FoldingSetNode {
// Replace each instance of F from the element list of this node with T.
void replaceElement(Value *F, Value *T);
SmallVector<ElementVH, 4> Node;
ElementVH *Node;
unsigned NodeSize;
protected:
explicit MDNode(LLVMContext &C, Value *const *Vals, unsigned NumVals);
@ -150,19 +152,7 @@ public:
}
/// getNumElements - Return number of MDNode elements.
unsigned getNumElements() const {
return Node.size();
}
// Element access
typedef SmallVectorImpl<ElementVH>::const_iterator const_elem_iterator;
typedef SmallVectorImpl<ElementVH>::iterator elem_iterator;
/// elem_empty - Return true if MDNode is empty.
bool elem_empty() const { return Node.empty(); }
const_elem_iterator elem_begin() const { return Node.begin(); }
const_elem_iterator elem_end() const { return Node.end(); }
elem_iterator elem_begin() { return Node.begin(); }
elem_iterator elem_end() { return Node.end(); }
unsigned getNumElements() const { return NodeSize; }
/// Profile - calculate a unique identifier for this MDNode to collapse
/// duplicates

7
lib/Bitcode/Writer/ValueEnumerator.cpp
View File

@ -214,10 +214,9 @@ void ValueEnumerator::EnumerateMetadata(const MetadataBase *MD) {
MDValues.push_back(std::make_pair(MD, 1U));
MDValueMap[MD] = MDValues.size();
MDValueID = MDValues.size();
for (MDNode::const_elem_iterator I = N->elem_begin(), E = N->elem_end();
I != E; ++I) {
if (*I)
EnumerateValue(*I);
for (unsigned i = 0, e = N->getNumElements(); i != e; ++i) {
if (Value *V = N->getElement(i))
EnumerateValue(V);
else
EnumerateType(Type::getVoidTy(MD->getContext()));
}

17
lib/VMCore/AsmWriter.cpp
View File

@ -818,9 +818,8 @@ void SlotTracker::CreateMetadataSlot(const MDNode *N) {
unsigned DestSlot = mdnNext++;
mdnMap[N] = DestSlot;
for (MDNode::const_elem_iterator MDI = N->elem_begin(),
MDE = N->elem_end(); MDI != MDE; ++MDI) {
const Value *TV = *MDI;
for (unsigned i = 0, e = N->getNumElements(); i != e; ++i) {
const Value *TV = N->getElement(i);
if (TV)
if (const MDNode *N2 = dyn_cast<MDNode>(TV))
CreateMetadataSlot(N2);
@ -906,9 +905,8 @@ static void WriteMDNodes(formatted_raw_ostream &Out, TypePrinting &TypePrinter,
Out << '!' << i << " = metadata ";
const MDNode *Node = Nodes[i];
Out << "!{";
for (MDNode::const_elem_iterator NI = Node->elem_begin(),
NE = Node->elem_end(); NI != NE;) {
const Value *V = *NI;
for (unsigned mi = 0, me = Node->getNumElements(); mi != me; ++mi) {
const Value *V = Node->getElement(mi);
if (!V)
Out << "null";
else if (const MDNode *N = dyn_cast<MDNode>(V)) {
@ -916,11 +914,12 @@ static void WriteMDNodes(formatted_raw_ostream &Out, TypePrinting &TypePrinter,
Out << '!' << Machine.getMetadataSlot(N);
}
else {
TypePrinter.print((*NI)->getType(), Out);
TypePrinter.print(V->getType(), Out);
Out << ' ';
WriteAsOperandInternal(Out, *NI, &TypePrinter, &Machine);
WriteAsOperandInternal(Out, Node->getElement(mi),
&TypePrinter, &Machine);
}
if (++NI != NE)
if (mi + 1 != me)
Out << ", ";
}

17
lib/VMCore/Metadata.cpp
View File

@ -67,6 +67,9 @@ MDNode::MDNode(LLVMContext &C, Value *const *Vals, unsigned NumVals)
: MetadataBase(Type::getMetadataTy(C), Value::MDNodeVal) {
NumOperands = 0;
resizeOperands(NumVals);
NodeSize = NumVals;
Node = new ElementVH[NodeSize];
ElementVH *Ptr = Node;
for (unsigned i = 0; i != NumVals; ++i) {
// Only record metadata uses.
if (MetadataBase *MB = dyn_cast_or_null<MetadataBase>(Vals[i]))
@ -74,13 +77,13 @@ MDNode::MDNode(LLVMContext &C, Value *const *Vals, unsigned NumVals)
else if(Vals[i] &&
Vals[i]->getType()->getTypeID() == Type::MetadataTyID)
OperandList[NumOperands++] = Vals[i];
Node.push_back(ElementVH(Vals[i], this));
*Ptr++ = ElementVH(Vals[i], this);
}
}
void MDNode::Profile(FoldingSetNodeID &ID) const {
for (const_elem_iterator I = elem_begin(), E = elem_end(); I != E; ++I)
ID.AddPointer(*I);
for (unsigned i = 0, e = getNumElements(); i != e; ++i)
ID.AddPointer(getElement(i));
}
MDNode *MDNode::get(LLVMContext &Context, Value*const* Vals, unsigned NumVals) {
@ -109,7 +112,8 @@ MDNode *MDNode::get(LLVMContext &Context, Value*const* Vals, unsigned NumVals) {
/// dropAllReferences - Remove all uses and clear node vector.
void MDNode::dropAllReferences() {
User::dropAllReferences();
Node.clear();
delete [] Node;
Node = NULL;
}
MDNode::~MDNode() {
@ -132,9 +136,8 @@ void MDNode::replaceElement(Value *From, Value *To) {
// From in this MDNode's element list.
SmallVector<unsigned, 4> Indexes;
unsigned Index = 0;
for (SmallVector<ElementVH, 4>::iterator I = Node.begin(),
E = Node.end(); I != E; ++I, ++Index) {
Value *V = *I;
for (unsigned i = 0, e = getNumElements(); i != e; ++i, ++Index) {
Value *V = getElement(i);
if (V && V == From)
Indexes.push_back(Index);
}