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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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50
include/llvm/Constants.h
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@ -26,7 +26,6 @@
#include "llvm/OperandTraits.h"
#include "llvm/ADT/APInt.h"
#include "llvm/ADT/APFloat.h"
#include "llvm/ADT/FoldingSet.h"
#include "llvm/ADT/SmallVector.h"
namespace llvm {
@ -877,55 +876,6 @@ public:
}
};
//===----------------------------------------------------------------------===//
/// MDNode - a tuple of other values.
/// These contain a list of the Constants that represent the metadata.
///
class MDNode : public Constant, public FoldingSetNode {
MDNode(const MDNode &); // DO NOT IMPLEMENT
protected:
explicit MDNode(Constant*const* Vals, unsigned NumVals);
public:
/// get() - Static factory methods - Return objects of the specified value.
///
static MDNode *get(Constant*const* Vals, unsigned NumVals);
// Transparently provide more efficient getOperand methods.
DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Constant);
/// getType() specialization - Type is always an empty struct.
///
inline const Type *getType() const {
return Type::EmptyStructTy;
}
/// isNullValue - Return true if this is the value that would be returned by
/// getNullValue. This always returns false because getNullValue will never
/// produce metadata.
virtual bool isNullValue() const {
return false;
}
/// Profile - calculate a unique identifier for this MDNode to collapse
/// duplicates
void Profile(FoldingSetNodeID &ID);
virtual void destroyConstant();
virtual void replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U);
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const MDNode *) { return true; }
static bool classof(const Value *V) {
return V->getValueID() == MDNodeVal;
}
};
template <>
struct OperandTraits<MDNode> : VariadicOperandTraits<> {
};
DEFINE_TRANSPARENT_CASTED_OPERAND_ACCESSORS(MDNode, Constant)
} // End llvm namespace
#endif