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