#ifndef LLVM_METADATA_H
#define LLVM_METADATA_H
-#include "llvm/User.h"
+#include "llvm/Value.h"
#include "llvm/Type.h"
#include "llvm/ADT/FoldingSet.h"
+#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallVector.h"
-#include "llvm/ADT/DenseMap.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;
class Instruction;
class LLVMContext;
+class MetadataContextImpl;
//===----------------------------------------------------------------------===//
// MetadataBase - A base class for MDNode, MDString and NamedMDNode.
-class MetadataBase : public User {
-private:
- /// ReservedSpace - The number of operands actually allocated. NumOperands is
- /// the number actually in use.
- unsigned ReservedSpace;
-
+class MetadataBase : public Value {
protected:
MetadataBase(const Type *Ty, unsigned scid)
- : User(Ty, scid, NULL, 0), ReservedSpace(0) {}
+ : Value(Ty, scid) {}
- void resizeOperands(unsigned NumOps);
public:
/// Methods for support type inquiry through isa, cast, and dyn_cast:
/// MDString is always unnamd.
class MDString : public MetadataBase {
MDString(const MDString &); // DO NOT IMPLEMENT
- void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
- unsigned getNumOperands(); // DO NOT IMPLEMENT
StringRef Str;
protected:
- explicit MDString(LLVMContext &C, const char *begin, unsigned l)
- : MetadataBase(Type::getMetadataTy(C), Value::MDStringVal), Str(begin, l) {}
+ explicit MDString(LLVMContext &C, StringRef S)
+ : MetadataBase(Type::getMetadataTy(C), Value::MDStringVal), Str(S) {}
public:
- // Do not allocate any space for operands.
- void *operator new(size_t s) {
- return User::operator new(s, 0);
- }
- static MDString *get(LLVMContext &Context, const StringRef &Str);
+ static MDString *get(LLVMContext &Context, StringRef Str);
+ static MDString *get(LLVMContext &Context, const char *Str);
StringRef getString() const { return Str; }
- unsigned getLength() const { return Str.size(); }
+ unsigned getLength() const { return (unsigned)Str.size(); }
typedef StringRef::iterator iterator;
/// MDNode is always unnamed.
class MDNode : public MetadataBase, public FoldingSetNode {
MDNode(const MDNode &); // DO NOT IMPLEMENT
- void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
- // getNumOperands - Make this only available for private uses.
- unsigned getNumOperands() { return User::getNumOperands(); }
friend class ElementVH;
- // Use CallbackVH to hold MDNOde elements.
+ // Use CallbackVH to hold MDNode elements.
struct ElementVH : public CallbackVH {
MDNode *Parent;
ElementVH() {}
Parent->replaceElement(this->operator Value*(), NV);
}
};
+
+ static const unsigned short FunctionLocalBit = 1;
+
// Replace each instance of F from the element list of this node with T.
void replaceElement(Value *F, Value *T);
unsigned NodeSize;
protected:
- explicit MDNode(LLVMContext &C, Value *const *Vals, unsigned NumVals);
+ explicit MDNode(LLVMContext &C, Value *const *Vals, unsigned NumVals,
+ bool isFunctionLocal);
public:
- // Do not allocate any space for operands.
- void *operator new(size_t s) {
- return User::operator new(s, 0);
- }
// Constructors and destructors.
- static MDNode *get(LLVMContext &Context,
- Value *const *Vals, unsigned NumVals);
-
- /// dropAllReferences - Remove all uses and clear node vector.
- void dropAllReferences();
+ static MDNode *get(LLVMContext &Context, Value *const *Vals, unsigned NumVals,
+ bool isFunctionLocal = false);
/// ~MDNode - Destroy MDNode.
~MDNode();
/// getNumElements - Return number of MDNode elements.
unsigned getNumElements() const { return NodeSize; }
+
+ /// isFunctionLocal - Return whether MDNode is local to a function.
+ /// Note: MDNodes are designated as function-local when created, and keep
+ /// that designation even if their operands are modified to no longer
+ /// refer to function-local IR.
+ bool isFunctionLocal() const { return SubclassData & FunctionLocalBit; }
+
+ /// getLocalFunction - Return false if MDNode's recursive function-localness
+ /// is invalid (local to more than one function). Return true otherwise.
+ /// If MDNode has one function to which it is local, set LocalFunction to that
+ /// function.
+ bool getLocalFunction(Function *LocalFunction,
+ SmallPtrSet<MDNode *, 32> *VisitedMDNodes = NULL);
/// Profile - calculate a unique identifier for this MDNode to collapse
/// duplicates
}
};
-//===----------------------------------------------------------------------===//
-/// WeakMetadataVH - a weak value handle for metadata.
-class WeakMetadataVH : public WeakVH {
-public:
- WeakMetadataVH() : WeakVH() {}
- WeakMetadataVH(MetadataBase *M) : WeakVH(M) {}
- WeakMetadataVH(const WeakMetadataVH &RHS) : WeakVH(RHS) {}
-
- operator Value*() const {
- llvm_unreachable("WeakMetadataVH only handles Metadata");
- }
-
- operator MetadataBase*() const {
- return dyn_cast_or_null<MetadataBase>(getValPtr());
- }
-};
-
//===----------------------------------------------------------------------===//
/// NamedMDNode - a tuple of other metadata.
/// NamedMDNode is always named. All NamedMDNode element has a type of metadata.
friend class LLVMContextImpl;
NamedMDNode(const NamedMDNode &); // DO NOT IMPLEMENT
- void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
- // getNumOperands - Make this only available for private uses.
- unsigned getNumOperands() { return User::getNumOperands(); }
Module *Parent;
- SmallVector<WeakMetadataVH, 4> Node;
- typedef SmallVectorImpl<WeakMetadataVH>::iterator elem_iterator;
+ SmallVector<TrackingVH<MetadataBase>, 4> Node;
void setParent(Module *M) { Parent = M; }
protected:
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(LLVMContext &C, const Twine &N,
MetadataBase *const *MDs,
unsigned NumMDs, Module *M = 0) {
/// getNumElements - Return number of NamedMDNode elements.
unsigned getNumElements() const {
- return Node.size();
+ return (unsigned)Node.size();
}
/// addElement - Add metadata element.
void addElement(MetadataBase *M) {
- resizeOperands(NumOperands + 1);
- OperandList[NumOperands++] = M;
- Node.push_back(WeakMetadataVH(M));
+ Node.push_back(TrackingVH<MetadataBase>(M));
}
- typedef SmallVectorImpl<WeakMetadataVH>::const_iterator const_elem_iterator;
+ typedef SmallVectorImpl<TrackingVH<MetadataBase> >::iterator elem_iterator;
+ typedef SmallVectorImpl<TrackingVH<MetadataBase> >::const_iterator
+ const_elem_iterator;
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(); }
/// must start with an alphabet. The regular expression used to check name
/// is [a-zA-Z$._][a-zA-Z$._0-9]*
class MetadataContext {
-public:
- typedef std::pair<unsigned, 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;
+ // DO NOT IMPLEMENT
+ MetadataContext(MetadataContext&);
+ void operator=(MetadataContext&);
+ MetadataContextImpl *const pImpl;
public:
+ MetadataContext();
+ ~MetadataContext();
+
/// registerMDKind - Register a new metadata kind and return its ID.
/// A metadata kind can be registered only once.
- unsigned registerMDKind(const StringRef Name);
+ unsigned registerMDKind(StringRef Name);
/// getMDKind - Return metadata kind. If the requested metadata kind
/// is not registered then return 0.
- unsigned getMDKind(const StringRef Name) const;
+ unsigned getMDKind(StringRef Name) const;
/// isValidName - Return true if Name is a valid custom metadata handler name.
- static bool isValidName(const StringRef Name);
+ static bool isValidName(StringRef Name);
/// getMD - Get the metadata of given kind attached to an Instruction.
/// If the metadata is not found then return 0.
MDNode *getMD(unsigned Kind, const Instruction *Inst);
/// getMDs - Get the metadata attached to an Instruction.
- const MDMapTy *getMDs(const Instruction *Inst);
+ void getMDs(const Instruction *Inst,
+ SmallVectorImpl<std::pair<unsigned, TrackingVH<MDNode> > > &MDs) const;
/// addMD - Attach the metadata of given kind to an Instruction.
void addMD(unsigned Kind, MDNode *Node, Instruction *Inst);
/// the same metadata to In2.
void copyMD(Instruction *In1, Instruction *In2);
- /// getHandlerNames - Get handler names. This is used by bitcode
- /// writer.
- const StringMap<unsigned> *getHandlerNames();
+ /// getHandlerNames - Populate client supplied smallvector using custom
+ /// metadata name and ID.
+ void getHandlerNames(SmallVectorImpl<std::pair<unsigned, StringRef> >&) const;
/// ValueIsDeleted - This handler is used to update metadata store
/// when a value is deleted.
void ValueIsDeleted(const Value *) {}
- void ValueIsDeleted(Instruction *Inst) {
- removeAllMetadata(Inst);
- }
+ void ValueIsDeleted(Instruction *Inst);
void ValueIsRAUWd(Value *V1, Value *V2);
/// ValueIsCloned - This handler is used to update metadata store
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