llvm-6502/lib/IR/AttributeImpl.h
2013-02-13 08:42:21 +00:00

279 lines
9.3 KiB
C++

//===-- AttributeImpl.h - Attribute Internals -------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
///
/// \file
/// \brief This file defines various helper methods and classes used by
/// LLVMContextImpl for creating and managing attributes.
///
//===----------------------------------------------------------------------===//
#ifndef LLVM_ATTRIBUTESIMPL_H
#define LLVM_ATTRIBUTESIMPL_H
#include "llvm/ADT/FoldingSet.h"
#include "llvm/IR/Attributes.h"
#include <string>
namespace llvm {
class Constant;
class LLVMContext;
//===----------------------------------------------------------------------===//
/// \class
/// \brief A set of classes that contain the kind and (optional) value of the
/// attribute object. There are three main categories: enum attribute entries,
/// represented by Attribute::AttrKind; alignment attribute entries; and string
/// attribute enties, which are for target-dependent attributes.
class AttributeEntry {
unsigned char KindID;
protected:
enum AttrEntryKind {
EnumAttrEntry,
AlignAttrEntry,
StringAttrEntry
};
public:
AttributeEntry(AttrEntryKind Kind)
: KindID(Kind) {}
virtual ~AttributeEntry() {}
unsigned getKindID() const { return KindID; }
static inline bool classof(const AttributeEntry *) { return true; }
};
class EnumAttributeEntry : public AttributeEntry {
Attribute::AttrKind Kind;
public:
EnumAttributeEntry(Attribute::AttrKind Kind)
: AttributeEntry(EnumAttrEntry), Kind(Kind) {}
Attribute::AttrKind getEnumKind() const { return Kind; }
static inline bool classof(const AttributeEntry *AE) {
return AE->getKindID() == EnumAttrEntry;
}
static inline bool classof(const EnumAttributeEntry *) { return true; }
};
class AlignAttributeEntry : public AttributeEntry {
Attribute::AttrKind Kind;
unsigned Align;
public:
AlignAttributeEntry(Attribute::AttrKind Kind, unsigned Align)
: AttributeEntry(AlignAttrEntry), Kind(Kind), Align(Align) {}
Attribute::AttrKind getEnumKind() const { return Kind; }
unsigned getAlignment() const { return Align; }
static inline bool classof(const AttributeEntry *AE) {
return AE->getKindID() == AlignAttrEntry;
}
static inline bool classof(const AlignAttributeEntry *) { return true; }
};
class StringAttributeEntry : public AttributeEntry {
std::string Kind;
std::string Val;
public:
StringAttributeEntry(StringRef Kind, StringRef Val = StringRef())
: AttributeEntry(StringAttrEntry), Kind(Kind), Val(Val) {}
StringRef getStringKind() const { return Kind; }
StringRef getStringValue() const { return Val; }
static inline bool classof(const AttributeEntry *AE) {
return AE->getKindID() == StringAttrEntry;
}
static inline bool classof(const StringAttributeEntry *) { return true; }
};
//===----------------------------------------------------------------------===//
/// \class
/// \brief This class represents a single, uniqued attribute. That attribute
/// could be a single enum, a tuple, or a string.
class AttributeImpl : public FoldingSetNode {
LLVMContext &Context; ///< Global context for uniquing objects
AttributeEntry *Entry; ///< Holds the kind and value of the attribute
// AttributesImpl is uniqued, these should not be publicly available.
void operator=(const AttributeImpl &) LLVM_DELETED_FUNCTION;
AttributeImpl(const AttributeImpl &) LLVM_DELETED_FUNCTION;
public:
AttributeImpl(LLVMContext &C, Attribute::AttrKind Kind);
AttributeImpl(LLVMContext &C, Attribute::AttrKind Kind, unsigned Align);
AttributeImpl(LLVMContext &C, StringRef Kind, StringRef Val = StringRef());
~AttributeImpl();
LLVMContext &getContext() { return Context; }
bool isEnumAttribute() const;
bool isAlignAttribute() const;
bool isStringAttribute() const;
bool hasAttribute(Attribute::AttrKind A) const;
bool hasAttribute(StringRef Kind) const;
Attribute::AttrKind getKindAsEnum() const;
uint64_t getValueAsInt() const;
StringRef getKindAsString() const;
StringRef getValueAsString() const;
/// \brief Used when sorting the attributes.
bool operator<(const AttributeImpl &AI) const;
void Profile(FoldingSetNodeID &ID) const {
if (isEnumAttribute())
Profile(ID, getKindAsEnum(), 0);
else if (isAlignAttribute())
Profile(ID, getKindAsEnum(), getValueAsInt());
else
Profile(ID, getKindAsString(), getValueAsString());
}
static void Profile(FoldingSetNodeID &ID, Attribute::AttrKind Kind,
uint64_t Val) {
ID.AddInteger(Kind);
if (Val) ID.AddInteger(Val);
}
static void Profile(FoldingSetNodeID &ID, StringRef Kind, StringRef Values) {
ID.AddString(Kind);
ID.AddString(Values);
}
// FIXME: Remove this!
static uint64_t getAttrMask(Attribute::AttrKind Val);
};
//===----------------------------------------------------------------------===//
/// \class
/// \brief This class represents a group of attributes that apply to one
/// element: function, return type, or parameter.
class AttributeSetNode : public FoldingSetNode {
SmallVector<Attribute, 4> AttrList;
AttributeSetNode(ArrayRef<Attribute> Attrs)
: AttrList(Attrs.begin(), Attrs.end()) {}
// AttributesSetNode is uniqued, these should not be publicly available.
void operator=(const AttributeSetNode &) LLVM_DELETED_FUNCTION;
AttributeSetNode(const AttributeSetNode &) LLVM_DELETED_FUNCTION;
public:
static AttributeSetNode *get(LLVMContext &C, ArrayRef<Attribute> Attrs);
bool hasAttribute(Attribute::AttrKind Kind) const;
bool hasAttribute(StringRef Kind) const;
bool hasAttributes() const { return !AttrList.empty(); }
Attribute getAttribute(Attribute::AttrKind Kind) const;
Attribute getAttribute(StringRef Kind) const;
unsigned getAlignment() const;
unsigned getStackAlignment() const;
std::string getAsString(bool InAttrGrp) const;
typedef SmallVectorImpl<Attribute>::iterator iterator;
typedef SmallVectorImpl<Attribute>::const_iterator const_iterator;
iterator begin() { return AttrList.begin(); }
iterator end() { return AttrList.end(); }
const_iterator begin() const { return AttrList.begin(); }
const_iterator end() const { return AttrList.end(); }
void Profile(FoldingSetNodeID &ID) const {
Profile(ID, AttrList);
}
static void Profile(FoldingSetNodeID &ID, ArrayRef<Attribute> AttrList) {
for (unsigned I = 0, E = AttrList.size(); I != E; ++I)
AttrList[I].Profile(ID);
}
};
//===----------------------------------------------------------------------===//
/// \class
/// \brief This class represents a set of attributes that apply to the function,
/// return type, and parameters.
class AttributeSetImpl : public FoldingSetNode {
friend class AttributeSet;
LLVMContext &Context;
typedef std::pair<unsigned, AttributeSetNode*> IndexAttrPair;
SmallVector<IndexAttrPair, 4> AttrNodes;
// AttributesSet is uniqued, these should not be publicly available.
void operator=(const AttributeSetImpl &) LLVM_DELETED_FUNCTION;
AttributeSetImpl(const AttributeSetImpl &) LLVM_DELETED_FUNCTION;
public:
AttributeSetImpl(LLVMContext &C,
ArrayRef<std::pair<unsigned, AttributeSetNode*> > attrs)
: Context(C), AttrNodes(attrs.begin(), attrs.end()) {}
/// \brief Get the context that created this AttributeSetImpl.
LLVMContext &getContext() { return Context; }
/// \brief Return the number of attributes this AttributeSet contains.
unsigned getNumAttributes() const { return AttrNodes.size(); }
/// \brief Get the index of the given "slot" in the AttrNodes list. This index
/// is the index of the return, parameter, or function object that the
/// attributes are applied to, not the index into the AttrNodes list where the
/// attributes reside.
uint64_t getSlotIndex(unsigned Slot) const {
return AttrNodes[Slot].first;
}
/// \brief Retrieve the attributes for the given "slot" in the AttrNode list.
/// \p Slot is an index into the AttrNodes list, not the index of the return /
/// parameter/ function which the attributes apply to.
AttributeSet getSlotAttributes(unsigned Slot) const {
return AttributeSet::get(Context, AttrNodes[Slot]);
}
/// \brief Retrieve the attribute set node for the given "slot" in the
/// AttrNode list.
AttributeSetNode *getSlotNode(unsigned Slot) const {
return AttrNodes[Slot].second;
}
typedef AttributeSetNode::iterator iterator;
typedef AttributeSetNode::const_iterator const_iterator;
iterator begin(unsigned Idx)
{ return AttrNodes[Idx].second->begin(); }
iterator end(unsigned Idx)
{ return AttrNodes[Idx].second->end(); }
const_iterator begin(unsigned Idx) const
{ return AttrNodes[Idx].second->begin(); }
const_iterator end(unsigned Idx) const
{ return AttrNodes[Idx].second->end(); }
void Profile(FoldingSetNodeID &ID) const {
Profile(ID, AttrNodes);
}
static void Profile(FoldingSetNodeID &ID,
ArrayRef<std::pair<unsigned, AttributeSetNode*> > Nodes) {
for (unsigned i = 0, e = Nodes.size(); i != e; ++i) {
ID.AddInteger(Nodes[i].first);
ID.AddPointer(Nodes[i].second);
}
}
// FIXME: This atrocity is temporary.
uint64_t Raw(uint64_t Index) const;
};
} // end llvm namespace
#endif