1 //===-- AttributeImpl.h - Attribute Internals -------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
11 /// \brief This file defines various helper methods and classes used by
12 /// LLVMContextImpl for creating and managing attributes.
14 //===----------------------------------------------------------------------===//
16 #ifndef LLVM_ATTRIBUTESIMPL_H
17 #define LLVM_ATTRIBUTESIMPL_H
19 #include "llvm/ADT/FoldingSet.h"
20 #include "llvm/IR/Attributes.h"
28 //===----------------------------------------------------------------------===//
30 /// \brief A set of classes that contain the kind and (optional) value of the
31 /// attribute object. There are three main categories: enum attribute entries,
32 /// represented by Attribute::AttrKind; alignment attribute entries; and string
33 /// attribute enties, which are for target-dependent attributes.
34 class AttributeEntry {
43 AttributeEntry(AttrEntryKind Kind)
45 virtual ~AttributeEntry() {}
47 unsigned getKindID() const { return KindID; }
49 static inline bool classof(const AttributeEntry *) { return true; }
52 class EnumAttributeEntry : public AttributeEntry {
53 Attribute::AttrKind Kind;
55 EnumAttributeEntry(Attribute::AttrKind Kind)
56 : AttributeEntry(EnumAttrEntry), Kind(Kind) {}
58 Attribute::AttrKind getEnumKind() const { return Kind; }
60 static inline bool classof(const AttributeEntry *AE) {
61 return AE->getKindID() == EnumAttrEntry;
63 static inline bool classof(const EnumAttributeEntry *) { return true; }
66 class AlignAttributeEntry : public AttributeEntry {
67 Attribute::AttrKind Kind;
70 AlignAttributeEntry(Attribute::AttrKind Kind, unsigned Align)
71 : AttributeEntry(AlignAttrEntry), Kind(Kind), Align(Align) {}
73 Attribute::AttrKind getEnumKind() const { return Kind; }
74 unsigned getAlignment() const { return Align; }
76 static inline bool classof(const AttributeEntry *AE) {
77 return AE->getKindID() == AlignAttrEntry;
79 static inline bool classof(const AlignAttributeEntry *) { return true; }
82 class StringAttributeEntry : public AttributeEntry {
86 StringAttributeEntry(StringRef Kind, StringRef Val = StringRef())
87 : AttributeEntry(StringAttrEntry), Kind(Kind), Val(Val) {}
89 StringRef getStringKind() const { return Kind; }
90 StringRef getStringValue() const { return Val; }
92 static inline bool classof(const AttributeEntry *AE) {
93 return AE->getKindID() == StringAttrEntry;
95 static inline bool classof(const StringAttributeEntry *) { return true; }
98 //===----------------------------------------------------------------------===//
100 /// \brief This class represents a single, uniqued attribute. That attribute
101 /// could be a single enum, a tuple, or a string.
102 class AttributeImpl : public FoldingSetNode {
103 LLVMContext &Context; ///< Global context for uniquing objects
104 Constant *Kind; ///< Kind of attribute: enum or string
106 AttributeEntry *Entry; ///< Holds the kind and value of the attribute
108 // AttributesImpl is uniqued, these should not be publicly available.
109 void operator=(const AttributeImpl &) LLVM_DELETED_FUNCTION;
110 AttributeImpl(const AttributeImpl &) LLVM_DELETED_FUNCTION;
112 AttributeImpl(LLVMContext &C, Attribute::AttrKind Kind);
113 AttributeImpl(LLVMContext &C, Attribute::AttrKind Kind, unsigned Align);
114 AttributeImpl(LLVMContext &C, StringRef Kind, StringRef Val = StringRef());
117 LLVMContext &getContext() { return Context; }
119 bool isEnumAttribute() const;
120 bool isAlignAttribute() const;
121 bool isStringAttribute() const;
123 bool hasAttribute(Attribute::AttrKind A) const;
124 bool hasAttribute(StringRef Kind) const;
126 Attribute::AttrKind getKindAsEnum() const;
127 uint64_t getValueAsInt() const;
129 StringRef getKindAsString() const;
130 StringRef getValueAsString() const;
132 /// \brief Used when sorting the attributes.
133 bool operator<(const AttributeImpl &AI) const;
135 void Profile(FoldingSetNodeID &ID) const {
136 if (isEnumAttribute())
137 Profile(ID, getKindAsEnum(), 0);
138 else if (isAlignAttribute())
139 Profile(ID, getKindAsEnum(), getValueAsInt());
141 Profile(ID, getKindAsString(), getValueAsString());
143 static void Profile(FoldingSetNodeID &ID, Attribute::AttrKind Kind,
146 if (Val) ID.AddInteger(Val);
148 static void Profile(FoldingSetNodeID &ID, StringRef Kind, StringRef Values) {
150 ID.AddString(Values);
153 // FIXME: Remove this!
154 static uint64_t getAttrMask(Attribute::AttrKind Val);
157 //===----------------------------------------------------------------------===//
159 /// \brief This class represents a group of attributes that apply to one
160 /// element: function, return type, or parameter.
161 class AttributeSetNode : public FoldingSetNode {
162 SmallVector<Attribute, 4> AttrList;
164 AttributeSetNode(ArrayRef<Attribute> Attrs)
165 : AttrList(Attrs.begin(), Attrs.end()) {}
167 // AttributesSetNode is uniqued, these should not be publicly available.
168 void operator=(const AttributeSetNode &) LLVM_DELETED_FUNCTION;
169 AttributeSetNode(const AttributeSetNode &) LLVM_DELETED_FUNCTION;
171 static AttributeSetNode *get(LLVMContext &C, ArrayRef<Attribute> Attrs);
173 bool hasAttribute(Attribute::AttrKind Kind) const;
174 bool hasAttributes() const { return !AttrList.empty(); }
176 unsigned getAlignment() const;
177 unsigned getStackAlignment() const;
178 std::string getAsString() const;
180 typedef SmallVectorImpl<Attribute>::iterator iterator;
181 typedef SmallVectorImpl<Attribute>::const_iterator const_iterator;
183 iterator begin() { return AttrList.begin(); }
184 iterator end() { return AttrList.end(); }
186 const_iterator begin() const { return AttrList.begin(); }
187 const_iterator end() const { return AttrList.end(); }
189 void Profile(FoldingSetNodeID &ID) const {
190 Profile(ID, AttrList);
192 static void Profile(FoldingSetNodeID &ID, ArrayRef<Attribute> AttrList) {
193 for (unsigned I = 0, E = AttrList.size(); I != E; ++I)
194 AttrList[I].Profile(ID);
198 //===----------------------------------------------------------------------===//
200 /// \brief This class represents a set of attributes that apply to the function,
201 /// return type, and parameters.
202 class AttributeSetImpl : public FoldingSetNode {
203 friend class AttributeSet;
205 LLVMContext &Context;
207 typedef std::pair<unsigned, AttributeSetNode*> IndexAttrPair;
208 SmallVector<IndexAttrPair, 4> AttrNodes;
210 // AttributesSet is uniqued, these should not be publicly available.
211 void operator=(const AttributeSetImpl &) LLVM_DELETED_FUNCTION;
212 AttributeSetImpl(const AttributeSetImpl &) LLVM_DELETED_FUNCTION;
214 AttributeSetImpl(LLVMContext &C,
215 ArrayRef<std::pair<unsigned, AttributeSetNode*> > attrs)
216 : Context(C), AttrNodes(attrs.begin(), attrs.end()) {}
218 /// \brief Get the context that created this AttributeSetImpl.
219 LLVMContext &getContext() { return Context; }
221 /// \brief Return the number of attributes this AttributeSet contains.
222 unsigned getNumAttributes() const { return AttrNodes.size(); }
224 /// \brief Get the index of the given "slot" in the AttrNodes list. This index
225 /// is the index of the return, parameter, or function object that the
226 /// attributes are applied to, not the index into the AttrNodes list where the
227 /// attributes reside.
228 uint64_t getSlotIndex(unsigned Slot) const {
229 return AttrNodes[Slot].first;
232 /// \brief Retrieve the attributes for the given "slot" in the AttrNode list.
233 /// \p Slot is an index into the AttrNodes list, not the index of the return /
234 /// parameter/ function which the attributes apply to.
235 AttributeSet getSlotAttributes(unsigned Slot) const {
236 return AttributeSet::get(Context, AttrNodes[Slot]);
239 /// \brief Retrieve the attribute set node for the given "slot" in the
241 AttributeSetNode *getSlotNode(unsigned Slot) const {
242 return AttrNodes[Slot].second;
245 typedef AttributeSetNode::iterator iterator;
246 typedef AttributeSetNode::const_iterator const_iterator;
248 iterator begin(unsigned Idx)
249 { return AttrNodes[Idx].second->begin(); }
250 iterator end(unsigned Idx)
251 { return AttrNodes[Idx].second->end(); }
253 const_iterator begin(unsigned Idx) const
254 { return AttrNodes[Idx].second->begin(); }
255 const_iterator end(unsigned Idx) const
256 { return AttrNodes[Idx].second->end(); }
258 void Profile(FoldingSetNodeID &ID) const {
259 Profile(ID, AttrNodes);
261 static void Profile(FoldingSetNodeID &ID,
262 ArrayRef<std::pair<unsigned, AttributeSetNode*> > Nodes) {
263 for (unsigned i = 0, e = Nodes.size(); i != e; ++i) {
264 ID.AddInteger(Nodes[i].first);
265 ID.AddPointer(Nodes[i].second);
269 // FIXME: This atrocity is temporary.
270 uint64_t Raw(uint64_t Index) const;
273 } // end llvm namespace