#include "llvm/OperandTraits.h"
#include "llvm/ADT/FoldingSet.h"
#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/SmallPtrSet.h"
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/SmallSet.h"
+#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/ilist_node.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/ValueHandle.h"
namespace llvm {
class Constant;
-struct LLVMContext;
+class Instruction;
+class LLVMContext;
//===----------------------------------------------------------------------===//
// MetadataBase - A base class for MDNode, MDString and NamedMDNode.
void resizeOperands(unsigned NumOps);
public:
- /// getType() specialization - Type is always MetadataTy.
- ///
- inline const Type *getType() const {
- return Type::MetadataTy;
- }
-
/// isNullValue - Return true if this is the value that would be returned by
/// getNullValue. This always returns false because getNullValue will never
/// produce metadata.
StringRef Str;
protected:
- explicit MDString(const char *begin, unsigned l)
- : MetadataBase(Type::MetadataTy, Value::MDStringVal), Str(begin, l) {}
+ explicit MDString(LLVMContext &C, const char *begin, unsigned l)
+ : MetadataBase(Type::getMetadataTy(C), Value::MDStringVal), Str(begin, l) {}
public:
// Do not allocate any space for operands.
// getNumOperands - Make this only available for private uses.
unsigned getNumOperands() { return User::getNumOperands(); }
- SmallVector<WeakVH, 4> Node;
+ friend class ElementVH;
+ // Use CallbackVH to hold MDNOde elements.
+ struct ElementVH : public CallbackVH {
+ MDNode *Parent;
+ ElementVH(Value *V, MDNode *P) : CallbackVH(V), Parent(P) {}
+ ~ElementVH() {}
+
+ virtual void deleted() {
+ Parent->replaceElement(this->operator Value*(), 0);
+ }
+
+ virtual void allUsesReplacedWith(Value *NV) {
+ Parent->replaceElement(this->operator Value*(), NV);
+ }
+ };
+ // Replace each instance of F from the element list of this node with T.
+ void replaceElement(Value *F, Value *T);
+
+ SmallVector<ElementVH, 4> Node;
+
protected:
- explicit MDNode(Value*const* Vals, unsigned NumVals);
+ explicit MDNode(LLVMContext &C, Value*const* Vals, unsigned NumVals);
public:
// Do not allocate any space for operands.
void *operator new(size_t s) {
/// dropAllReferences - Remove all uses and clear node vector.
void dropAllReferences();
- /// ~MDNode - Destroy NamedMDNode.
+ /// ~MDNode - Destroy MDNode.
~MDNode();
/// getElement - Return specified element.
}
// Element access
- typedef SmallVectorImpl<WeakVH>::const_iterator const_elem_iterator;
- typedef SmallVectorImpl<WeakVH>::iterator elem_iterator;
+ 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(); }
elem_iterator elem_begin() { return Node.begin(); }
elem_iterator elem_end() { return Node.end(); }
- /// getType() specialization - Type is always MetadataTy.
- ///
- inline const Type *getType() const {
- return Type::MetadataTy;
- }
-
/// isNullValue - Return true if this is the value that would be returned by
/// getNullValue. This always returns false because getNullValue will never
/// produce metadata.
class NamedMDNode : public MetadataBase, public ilist_node<NamedMDNode> {
friend class SymbolTableListTraits<NamedMDNode, Module>;
- friend struct LLVMContextImpl;
+ friend class LLVMContextImpl;
NamedMDNode(const NamedMDNode &); // DO NOT IMPLEMENT
void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
typedef SmallVectorImpl<WeakMetadataVH>::iterator elem_iterator;
protected:
- explicit NamedMDNode(const Twine &N, MetadataBase*const* Vals,
+ explicit NamedMDNode(LLVMContext &C, const Twine &N, MetadataBase*const* Vals,
unsigned NumVals, Module *M = 0);
public:
// Do not allocate any space for operands.
void *operator new(size_t s) {
return User::operator new(s, 0);
}
- static NamedMDNode *Create(const Twine &N, MetadataBase*const*MDs,
+ static NamedMDNode *Create(LLVMContext &C, const Twine &N,
+ MetadataBase*const*MDs,
unsigned NumMDs, Module *M = 0) {
- return new NamedMDNode(N, MDs, NumMDs, M);
+ return new NamedMDNode(C, N, MDs, NumMDs, M);
}
+ static NamedMDNode *Create(const NamedMDNode *NMD, Module *M = 0);
+
/// eraseFromParent - Drop all references and remove the node from parent
/// module.
void eraseFromParent();
elem_iterator elem_begin() { return Node.begin(); }
elem_iterator elem_end() { return Node.end(); }
- /// getType() specialization - Type is always MetadataTy.
- ///
- inline const Type *getType() const {
- return Type::MetadataTy;
- }
-
/// isNullValue - Return true if this is the value that would be returned by
/// getNullValue. This always returns false because getNullValue will never
/// produce metadata.
return false;
}
- /// Profile - calculate a unique identifier for this MDNode to collapse
- /// duplicates
- void Profile(FoldingSetNodeID &ID) const;
-
virtual void replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U) {
llvm_unreachable(
"This should never be called because NamedMDNodes have no ops");
}
};
+//===----------------------------------------------------------------------===//
+/// Metadata -
+/// Metadata manages metadata used in a context.
+
+/// MDKindID - This id identifies metadata kind the metadata store. Valid
+/// ID values are 1 or higher. This ID is set by RegisterMDKind.
+typedef unsigned MDKindID;
+
+class Metadata {
+public:
+ typedef std::pair<MDKindID, WeakVH> MDPairTy;
+ typedef SmallVector<MDPairTy, 2> MDMapTy;
+ typedef DenseMap<const Instruction *, MDMapTy> MDStoreTy;
+ friend class BitcodeReader;
+private:
+
+ /// MetadataStore - Collection of metadata used in this context.
+ MDStoreTy MetadataStore;
+
+ /// MDHandlerNames - Map to hold metadata handler names.
+ StringMap<unsigned> MDHandlerNames;
+
+public:
+ /// RegisterMDKind - Register a new metadata kind and return its ID.
+ /// A metadata kind can be registered only once.
+ MDKindID RegisterMDKind(const char *Name);
+
+ /// getMDKind - Return metadata kind. If the requested metadata kind
+ /// is not registered then return 0.
+ MDKindID getMDKind(const char *Name);
+
+ /// getMD - Get the metadata of given kind attached with an Instruction.
+ /// If the metadata is not found then return 0.
+ MDNode *getMD(MDKindID Kind, const Instruction *Inst);
+
+ /// getMDs - Get the metadata attached with an Instruction.
+ const MDMapTy *getMDs(const Instruction *Inst);
+
+ /// setMD - Attach the metadata of given kind with an Instruction.
+ void setMD(MDKindID Kind, MDNode *Node, Instruction *Inst);
+
+ /// getHandlerNames - Get handler names. This is used by bitcode
+ /// writer.
+ const StringMap<unsigned> *getHandlerNames();
+
+ /// ValueIsDeleted - This handler is used to update metadata store
+ /// when a value is deleted.
+ void ValueIsDeleted(Value *V) {}
+ void ValueIsDeleted(const Instruction *Inst);
+};
+
} // end llvm namespace
#endif
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