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-rw-r--r--llvm/include/llvm/Metadata.h99
1 files changed, 64 insertions, 35 deletions
diff --git a/llvm/include/llvm/Metadata.h b/llvm/include/llvm/Metadata.h
index 7b48d8afbfa..d0f3477e724 100644
--- a/llvm/include/llvm/Metadata.h
+++ b/llvm/include/llvm/Metadata.h
@@ -16,7 +16,7 @@
#ifndef LLVM_MDNODE_H
#define LLVM_MDNODE_H
-#include "llvm/Value.h"
+#include "llvm/User.h"
#include "llvm/Type.h"
#include "llvm/OperandTraits.h"
#include "llvm/ADT/FoldingSet.h"
@@ -31,11 +31,17 @@ class LLVMContext;
//===----------------------------------------------------------------------===//
// MetadataBase - A base class for MDNode, MDString and NamedMDNode.
-class MetadataBase : public Value {
+class MetadataBase : public User {
+private:
+ /// ReservedSpace - The number of operands actually allocated. NumOperands is
+ /// the number actually in use.
+ unsigned ReservedSpace;
+
protected:
MetadataBase(const Type *Ty, unsigned scid)
- : Value(Ty, scid) {}
+ : User(Ty, scid, NULL, 0), ReservedSpace(0) {}
+ void resizeOperands(unsigned NumOps);
public:
/// getType() specialization - Type is always MetadataTy.
///
@@ -64,13 +70,19 @@ public:
/// MDString is always unnamd.
class MDString : public MetadataBase {
MDString(const MDString &); // DO NOT IMPLEMENT
- StringRef Str;
+ void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
+ unsigned getNumOperands(); // DO NOT IMPLEMENT
+ StringRef Str;
protected:
explicit MDString(const char *begin, unsigned l)
: MetadataBase(Type::MetadataTy, Value::MDStringVal), Str(begin, l) {}
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);
StringRef getString() const { return Str; }
@@ -97,38 +109,49 @@ public:
/// These contain a list of the values that represent the metadata.
/// MDNode is always unnamed.
class MDNode : public MetadataBase, public FoldingSetNode {
- MDNode(const MDNode &); // DO NOT IMPLEMENT
+ 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(); }
SmallVector<WeakVH, 4> Node;
- typedef SmallVectorImpl<WeakVH>::iterator elem_iterator;
-
protected:
explicit MDNode(Value*const* Vals, unsigned NumVals);
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);
-
- typedef SmallVectorImpl<WeakVH>::const_iterator const_elem_iterator;
+ /// dropAllReferences - Remove all uses and clear node vector.
+ void dropAllReferences();
+
+ /// ~MDNode - Destroy NamedMDNode.
+ ~MDNode();
+
+ /// getElement - Return specified element.
Value *getElement(unsigned i) const {
+ assert (getNumElements() > i && "Invalid element number!");
return Node[i];
}
+ /// getNumElements - Return number of MDNode elements.
unsigned getNumElements() const {
return Node.size();
}
- 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();
- }
+ // Element access
+ typedef SmallVectorImpl<WeakVH>::const_iterator const_elem_iterator;
+ typedef SmallVectorImpl<WeakVH>::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(); }
+ const_elem_iterator elem_end() const { return Node.end(); }
+ elem_iterator elem_begin() { return Node.begin(); }
+ elem_iterator elem_end() { return Node.end(); }
/// getType() specialization - Type is always MetadataTy.
///
@@ -183,10 +206,13 @@ template<typename ValueSubClass, typename ItemParentClass>
class NamedMDNode : public MetadataBase, public ilist_node<NamedMDNode> {
friend class SymbolTableListTraits<NamedMDNode, Module>;
- NamedMDNode(const NamedMDNode &); // DO NOT IMPLEMENT
-
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;
@@ -195,6 +221,10 @@ protected:
explicit NamedMDNode(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,
unsigned NumMDs, Module *M = 0) {
return new NamedMDNode(N, MDs, NumMDs, M);
@@ -207,39 +237,38 @@ public:
/// dropAllReferences - Remove all uses and clear node vector.
void dropAllReferences();
+ /// ~NamedMDNode - Destroy NamedMDNode.
~NamedMDNode();
- typedef SmallVectorImpl<WeakMetadataVH>::const_iterator const_elem_iterator;
-
/// getParent - Get the module that holds this named metadata collection.
inline Module *getParent() { return Parent; }
inline const Module *getParent() const { return Parent; }
void setParent(Module *M) { Parent = M; }
+ /// getElement - Return specified element.
MetadataBase *getElement(unsigned i) const {
+ assert (getNumElements() > i && "Invalid element number!");
return Node[i];
}
+ /// getNumElements - Return number of NamedMDNode elements.
unsigned getNumElements() const {
return Node.size();
}
/// addElement - Add metadata element.
void addElement(MetadataBase *M) {
+ resizeOperands(0);
+ OperandList[NumOperands++] = M;
Node.push_back(WeakMetadataVH(M));
}
- 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();
- }
+ typedef SmallVectorImpl<WeakMetadataVH>::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(); }
+ elem_iterator elem_begin() { return Node.begin(); }
+ elem_iterator elem_end() { return Node.end(); }
/// getType() specialization - Type is always MetadataTy.
///
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