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271 lines
9.1 KiB
C++
271 lines
9.1 KiB
C++
//===-- 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 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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unsigned char KindID; ///< Holds the AttrEntryKind 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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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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AttributeImpl(AttrEntryKind KindID) : KindID(KindID) {}
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public:
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virtual ~AttributeImpl();
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bool isEnumAttribute() const { return KindID == EnumAttrEntry; }
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bool isAlignAttribute() const { return KindID == AlignAttrEntry; }
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bool isStringAttribute() const { return KindID == StringAttrEntry; }
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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 A set of classes that contain the 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 EnumAttributeImpl : public AttributeImpl {
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virtual void anchor();
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Attribute::AttrKind Kind;
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protected:
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EnumAttributeImpl(AttrEntryKind ID, Attribute::AttrKind Kind)
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: AttributeImpl(ID), Kind(Kind) {}
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public:
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EnumAttributeImpl(Attribute::AttrKind Kind)
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: AttributeImpl(EnumAttrEntry), Kind(Kind) {}
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Attribute::AttrKind getEnumKind() const { return Kind; }
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};
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class AlignAttributeImpl : public EnumAttributeImpl {
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void anchor() override;
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unsigned Align;
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public:
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AlignAttributeImpl(Attribute::AttrKind Kind, unsigned Align)
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: EnumAttributeImpl(AlignAttrEntry, Kind), Align(Align) {
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assert(
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(Kind == Attribute::Alignment || Kind == Attribute::StackAlignment) &&
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"Wrong kind for alignment attribute!");
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}
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unsigned getAlignment() const { return Align; }
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};
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class StringAttributeImpl : public AttributeImpl {
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virtual void anchor();
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std::string Kind;
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std::string Val;
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public:
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StringAttributeImpl(StringRef Kind, StringRef Val = StringRef())
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: AttributeImpl(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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};
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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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unsigned NumAttrs; ///< Number of attributes in this node.
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AttributeSetNode(ArrayRef<Attribute> Attrs) : NumAttrs(Attrs.size()) {
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// There's memory after the node where we can store the entries in.
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std::copy(Attrs.begin(), Attrs.end(),
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reinterpret_cast<Attribute *>(this + 1));
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}
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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 NumAttrs != 0; }
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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 const Attribute *iterator;
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iterator begin() const { return reinterpret_cast<iterator>(this + 1); }
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iterator end() const { return begin() + NumAttrs; }
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void Profile(FoldingSetNodeID &ID) const {
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Profile(ID, makeArrayRef(begin(), end()));
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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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unsigned NumAttrs; ///< Number of entries in this set.
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/// \brief Return a pointer to the IndexAttrPair for the specified slot.
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const IndexAttrPair *getNode(unsigned Slot) const {
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return reinterpret_cast<const IndexAttrPair *>(this + 1) + Slot;
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}
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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), NumAttrs(Attrs.size()) {
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#ifndef NDEBUG
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if (Attrs.size() >= 2) {
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for (const std::pair<unsigned, AttributeSetNode *> *i = Attrs.begin() + 1,
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*e = Attrs.end();
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i != e; ++i) {
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assert((i-1)->first <= i->first && "Attribute set not ordered!");
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}
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}
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#endif
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// There's memory after the node where we can store the entries in.
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std::copy(Attrs.begin(), Attrs.end(),
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reinterpret_cast<IndexAttrPair *>(this + 1));
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}
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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 NumAttrs; }
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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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unsigned getSlotIndex(unsigned Slot) const {
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return getNode(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, *getNode(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 getNode(Slot)->second;
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}
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typedef AttributeSetNode::iterator iterator;
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iterator begin(unsigned Slot) const { return getSlotNode(Slot)->begin(); }
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iterator end(unsigned Slot) const { return getSlotNode(Slot)->end(); }
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void Profile(FoldingSetNodeID &ID) const {
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Profile(ID, makeArrayRef(getNode(0), getNumAttributes()));
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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(unsigned Index) const;
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void dump() const;
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};
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} // end llvm namespace
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#endif
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