class Instruction;
class LLVMContext;
class Module;
-class MetadataContextImpl;
template <typename T> class SmallVectorImpl;
-
-//===----------------------------------------------------------------------===//
-// MetadataBase - A base class for MDNode, MDString and NamedMDNode.
-class MetadataBase : public Value {
-protected:
- MetadataBase(const Type *Ty, unsigned scid)
- : Value(Ty, scid) {}
-
-public:
-
- /// Methods for support type inquiry through isa, cast, and dyn_cast:
- static inline bool classof(const MetadataBase *) { return true; }
- static bool classof(const Value *V) {
- return V->getValueID() == MDStringVal || V->getValueID() == MDNodeVal
- || V->getValueID() == NamedMDNodeVal;
- }
-};
-
+template<typename ValueSubClass, typename ItemParentClass>
+ class SymbolTableListTraits;
+
+
//===----------------------------------------------------------------------===//
/// MDString - a single uniqued string.
/// These are used to efficiently contain a byte sequence for metadata.
/// MDString is always unnamd.
-class MDString : public MetadataBase {
+class MDString : public Value {
MDString(const MDString &); // DO NOT IMPLEMENT
StringRef Str;
};
-class MDNodeElement;
+class MDNodeOperand;
//===----------------------------------------------------------------------===//
/// MDNode - a tuple of other values.
-/// These contain a list of the values that represent the metadata.
-/// MDNode is always unnamed.
-class MDNode : public MetadataBase, public FoldingSetNode {
+class MDNode : public Value, public FoldingSetNode {
MDNode(const MDNode &); // DO NOT IMPLEMENT
void operator=(const MDNode &); // DO NOT IMPLEMENT
- friend class MDNodeElement;
+ friend class MDNodeOperand;
+ friend class LLVMContextImpl;
- MDNodeElement *Operands;
+ /// NumOperands - This many 'MDNodeOperand' items are co-allocated onto the
+ /// end of this MDNode.
unsigned NumOperands;
// Subclass data enums.
enum {
- FunctionLocalBit = 1
+ /// FunctionLocalBit - This bit is set if this MDNode is function local.
+ /// This is true when it (potentially transitively) contains a reference to
+ /// something in a function, like an argument, basicblock, or instruction.
+ FunctionLocalBit = 1 << 0,
+
+ /// NotUniquedBit - This is set on MDNodes that are not uniqued because they
+ /// have a null perand.
+ NotUniquedBit = 1 << 1,
+
+ /// DestroyFlag - This bit is set by destroy() so the destructor can assert
+ /// that the node isn't being destroyed with a plain 'delete'.
+ DestroyFlag = 1 << 2
};
- // Replace each instance of F from the element list of this node with T.
- void replaceElement(MDNodeElement *Op, Value *NewVal);
+ // FunctionLocal enums.
+ enum FunctionLocalness {
+ FL_Unknown = -1,
+ FL_No = 0,
+ FL_Yes = 1
+ };
+
+ /// replaceOperand - Replace each instance of F from the operand list of this
+ /// node with T.
+ void replaceOperand(MDNodeOperand *Op, Value *NewVal);
+ ~MDNode();
protected:
explicit MDNode(LLVMContext &C, Value *const *Vals, unsigned NumVals,
bool isFunctionLocal);
+
+ static MDNode *getMDNode(LLVMContext &C, Value *const *Vals, unsigned NumVals,
+ FunctionLocalness FL, bool Insert = true);
public:
// Constructors and destructors.
- static MDNode *get(LLVMContext &Context, Value *const *Vals, unsigned NumVals,
- bool isFunctionLocal = false);
-
- /// ~MDNode - Destroy MDNode.
- ~MDNode();
+ static MDNode *get(LLVMContext &Context, Value *const *Vals,
+ unsigned NumVals);
+ // getWhenValsUnresolved - Construct MDNode determining function-localness
+ // from isFunctionLocal argument, not by analyzing Vals.
+ static MDNode *getWhenValsUnresolved(LLVMContext &Context, Value *const *Vals,
+ unsigned NumVals, bool isFunctionLocal);
+
+ static MDNode *getIfExists(LLVMContext &Context, Value *const *Vals,
+ unsigned NumVals);
- /// getElement - Return specified element.
- Value *getElement(unsigned i) const;
+ /// getOperand - Return specified operand.
+ Value *getOperand(unsigned i) const;
- /// getNumElements - Return number of MDNode elements.
- unsigned getNumElements() const { return NumOperands; }
+ /// getNumOperands - Return number of MDNode operands.
+ unsigned getNumOperands() const { return NumOperands; }
/// isFunctionLocal - Return whether MDNode is local to a function.
/// Note: MDNodes are designated as function-local when created, and keep
bool isFunctionLocal() const {
return (getSubclassDataFromValue() & FunctionLocalBit) != 0;
}
+
+ // getFunction - If this metadata is function-local and recursively has a
+ // function-local operand, return the first such operand's parent function.
+ // Otherwise, return null. getFunction() should not be used for performance-
+ // critical code because it recursively visits all the MDNode's operands.
+ const Function *getFunction() const;
+
+ // destroy - Delete this node. Only when there are no uses.
+ void destroy();
/// Profile - calculate a unique identifier for this MDNode to collapse
/// duplicates
return V->getValueID() == MDNodeVal;
}
private:
+ bool isNotUniqued() const {
+ return (getSubclassDataFromValue() & NotUniquedBit) != 0;
+ }
+ void setIsNotUniqued();
+
// Shadow Value::setValueSubclassData with a private forwarding method so that
// any future subclasses cannot accidentally use it.
void setValueSubclassData(unsigned short D) {
};
//===----------------------------------------------------------------------===//
-/// NamedMDNode - a tuple of other metadata.
-/// NamedMDNode is always named. All NamedMDNode element has a type of metadata.
-template<typename ValueSubClass, typename ItemParentClass>
- class SymbolTableListTraits;
-
-class NamedMDNode : public MetadataBase, public ilist_node<NamedMDNode> {
+/// NamedMDNode - a tuple of MDNodes.
+/// NamedMDNode is always named. All NamedMDNode operand has a type of metadata.
+class NamedMDNode : public Value, public ilist_node<NamedMDNode> {
friend class SymbolTableListTraits<NamedMDNode, Module>;
+ friend struct ilist_traits<NamedMDNode>;
friend class LLVMContextImpl;
-
NamedMDNode(const NamedMDNode &); // DO NOT IMPLEMENT
+ std::string Name;
Module *Parent;
- void *Operands; // SmallVector<TrackingVH<MetadataBase>, 4>
+ void *Operands; // SmallVector<WeakVH<MDNode>, 4>
void setParent(Module *M) { Parent = M; }
protected:
- explicit NamedMDNode(LLVMContext &C, const Twine &N, MetadataBase*const *Vals,
+ explicit NamedMDNode(LLVMContext &C, const Twine &N, MDNode*const *Vals,
unsigned NumVals, Module *M = 0);
public:
- static NamedMDNode *Create(LLVMContext &C, const Twine &N,
- MetadataBase *const *MDs,
+ static NamedMDNode *Create(LLVMContext &C, const Twine &N,
+ MDNode *const *MDs,
unsigned NumMDs, Module *M = 0) {
return new NamedMDNode(C, N, MDs, NumMDs, M);
}
inline Module *getParent() { return Parent; }
inline const Module *getParent() const { return Parent; }
- /// getElement - Return specified element.
- MetadataBase *getElement(unsigned i) const;
+ /// getOperand - Return specified operand.
+ MDNode *getOperand(unsigned i) const;
- /// getNumElements - Return number of NamedMDNode elements.
- unsigned getNumElements() const;
+ /// getNumOperands - Return the number of NamedMDNode operands.
+ unsigned getNumOperands() const;
+
+ /// addOperand - Add metadata operand.
+ void addOperand(MDNode *M);
+
+ /// setName - Set the name of this named metadata.
+ void setName(const Twine &NewName);
+
+ /// getName - Return a constant reference to this named metadata's name.
+ StringRef getName() const;
- /// addElement - Add metadata element.
- void addElement(MetadataBase *M);
-
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const NamedMDNode *) { return true; }
static bool classof(const Value *V) {
}
};
-//===----------------------------------------------------------------------===//
-/// MetadataContext - MetadataContext handles uniquing and assignment of IDs for
-/// custom metadata types.
-///
-class MetadataContext {
- MetadataContext(MetadataContext&); // DO NOT IMPLEMENT
- void operator=(MetadataContext&); // DO NOT IMPLEMENT
-
- MetadataContextImpl *const pImpl;
- friend class Instruction;
-public:
- MetadataContext();
- ~MetadataContext();
-
- /// getMDKindID - Return a unique non-zero ID for the specified metadata kind.
- unsigned getMDKindID(StringRef Name) const;
-
- /// isValidName - Return true if Name is a valid custom metadata handler name.
- static bool isValidName(StringRef Name);
-
- /// copyMD - If metadata is attached with Instruction In1 then attach
- /// the same metadata to In2.
- void copyMD(Instruction *In1, Instruction *In2);
-
- /// getMDKindNames - Populate client supplied SmallVector with the name for
- /// each custom metadata ID. ID #0 is not used, so it is filled in as empty.
- void getMDKindNames(SmallVectorImpl<StringRef> &) const;
-
- /// ValueIsDeleted - This handler is used to update metadata store
- /// when a value is deleted.
- void ValueIsDeleted(Instruction *Inst);
-
- /// ValueIsCloned - This handler is used to update metadata store
- /// when In1 is cloned to create In2.
- void ValueIsCloned(const Instruction *In1, Instruction *In2);
-};
-
} // end llvm namespace
#endif
projects / oota-llvm.git / blobdiff