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Make MDNode use CallbackVH. Also change MDNode to store Value* instead of

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Constant* in preperation of a future change to support holding non-Constants
in an MDNode.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71407 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nick Lewycky
2009-05-10 20:57:05 +00:00
parent af3fdb5dc4
commit cb33799b9f
12 changed files with 270 additions and 105 deletions
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42
lib/VMCore/Constants.cpp
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@ -16,6 +16,7 @@
#include "llvm/DerivedTypes.h"
#include "llvm/GlobalValue.h"
#include "llvm/Instructions.h"
#include "llvm/MDNode.h"
#include "llvm/Module.h"
#include "llvm/ADT/FoldingSet.h"
#include "llvm/ADT/StringExtras.h"
@ -1687,18 +1688,18 @@ void MDString::destroyConstant() {
static ManagedStatic<FoldingSet<MDNode> > MDNodeSet;
MDNode::MDNode(Constant*const* Vals, unsigned NumVals)
: Constant(Type::EmptyStructTy, MDNodeVal,
OperandTraits<MDNode>::op_end(this) - NumVals, NumVals) {
std::copy(Vals, Vals + NumVals, OperandList);
MDNode::MDNode(Value*const* Vals, unsigned NumVals)
: Constant(Type::EmptyStructTy, MDNodeVal, 0, 0) {
for (unsigned i = 0; i != NumVals; ++i)
Node.push_back(ElementVH(Vals[i], this));
}
void MDNode::Profile(FoldingSetNodeID &ID) {
for (op_iterator I = op_begin(), E = op_end(); I != E; ++I)
void MDNode::Profile(FoldingSetNodeID &ID) const {
for (const_elem_iterator I = elem_begin(), E = elem_end(); I != E; ++I)
ID.AddPointer(*I);
}
MDNode *MDNode::get(Constant*const* Vals, unsigned NumVals) {
MDNode *MDNode::get(Value*const* Vals, unsigned NumVals) {
FoldingSetNodeID ID;
for (unsigned i = 0; i != NumVals; ++i)
ID.AddPointer(Vals[i]);
@ -1708,12 +1709,13 @@ MDNode *MDNode::get(Constant*const* Vals, unsigned NumVals) {
return N;
// InsertPoint will have been set by the FindNodeOrInsertPos call.
MDNode *N = new(NumVals) MDNode(Vals, NumVals);
MDNode *N = new(0) MDNode(Vals, NumVals);
MDNodeSet->InsertNode(N, InsertPoint);
return N;
}
void MDNode::destroyConstant() {
MDNodeSet->RemoveNode(this);
destroyConstantImpl();
}
@ -2801,23 +2803,19 @@ void ConstantExpr::replaceUsesOfWithOnConstant(Value *From, Value *ToV,
destroyConstant();
}
void MDNode::replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U) {
assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
SmallVector<Constant*, 8> Values;
Values.reserve(getNumOperands()); // Build replacement array...
for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
Constant *Val = getOperand(i);
if (Val == From) Val = cast<Constant>(To);
void MDNode::replaceElement(Value *From, Value *To) {
SmallVector<Value*, 4> Values;
Values.reserve(getNumElements()); // Build replacement array...
for (unsigned i = 0, e = getNumElements(); i != e; ++i) {
Value *Val = getElement(i);
if (Val == From) Val = To;
Values.push_back(Val);
}
Constant *Replacement = MDNode::get(&Values[0], Values.size());
MDNode *Replacement = MDNode::get(&Values[0], Values.size());
assert(Replacement != this && "I didn't contain From!");
// Everyone using this now uses the replacement.
uncheckedReplaceAllUsesWith(Replacement);
// Delete the old constant!
destroyConstant();
}