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comparison lib/IR/AttributeImpl.h @ 0:95c75e76d11b LLVM3.4

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LLVM 3.4
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Thu, 12 Dec 2013 13:56:28 +0900
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children 54457678186b
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-1:000000000000 0:95c75e76d11b
1 //===-- AttributeImpl.h - Attribute Internals -------------------*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 ///
10 /// \file
11 /// \brief This file defines various helper methods and classes used by
12 /// LLVMContextImpl for creating and managing attributes.
13 ///
14 //===----------------------------------------------------------------------===//
15
16 #ifndef LLVM_ATTRIBUTESIMPL_H
17 #define LLVM_ATTRIBUTESIMPL_H
18
19 #include "llvm/ADT/FoldingSet.h"
20 #include "llvm/IR/Attributes.h"
21 #include <string>
22
23 namespace llvm {
24
25 class Constant;
26 class LLVMContext;
27
28 //===----------------------------------------------------------------------===//
29 /// \class
30 /// \brief This class represents a single, uniqued attribute. That attribute
31 /// could be a single enum, a tuple, or a string.
32 class AttributeImpl : public FoldingSetNode {
33 unsigned char KindID; ///< Holds the AttrEntryKind of the attribute
34
35 // AttributesImpl is uniqued, these should not be publicly available.
36 void operator=(const AttributeImpl &) LLVM_DELETED_FUNCTION;
37 AttributeImpl(const AttributeImpl &) LLVM_DELETED_FUNCTION;
38
39 protected:
40 enum AttrEntryKind {
41 EnumAttrEntry,
42 AlignAttrEntry,
43 StringAttrEntry
44 };
45
46 AttributeImpl(AttrEntryKind KindID) : KindID(KindID) {}
47
48 public:
49 virtual ~AttributeImpl();
50
51 bool isEnumAttribute() const { return KindID == EnumAttrEntry; }
52 bool isAlignAttribute() const { return KindID == AlignAttrEntry; }
53 bool isStringAttribute() const { return KindID == StringAttrEntry; }
54
55 bool hasAttribute(Attribute::AttrKind A) const;
56 bool hasAttribute(StringRef Kind) const;
57
58 Attribute::AttrKind getKindAsEnum() const;
59 uint64_t getValueAsInt() const;
60
61 StringRef getKindAsString() const;
62 StringRef getValueAsString() const;
63
64 /// \brief Used when sorting the attributes.
65 bool operator<(const AttributeImpl &AI) const;
66
67 void Profile(FoldingSetNodeID &ID) const {
68 if (isEnumAttribute())
69 Profile(ID, getKindAsEnum(), 0);
70 else if (isAlignAttribute())
71 Profile(ID, getKindAsEnum(), getValueAsInt());
72 else
73 Profile(ID, getKindAsString(), getValueAsString());
74 }
75 static void Profile(FoldingSetNodeID &ID, Attribute::AttrKind Kind,
76 uint64_t Val) {
77 ID.AddInteger(Kind);
78 if (Val) ID.AddInteger(Val);
79 }
80 static void Profile(FoldingSetNodeID &ID, StringRef Kind, StringRef Values) {
81 ID.AddString(Kind);
82 if (!Values.empty()) ID.AddString(Values);
83 }
84
85 // FIXME: Remove this!
86 static uint64_t getAttrMask(Attribute::AttrKind Val);
87 };
88
89 //===----------------------------------------------------------------------===//
90 /// \class
91 /// \brief A set of classes that contain the value of the
92 /// attribute object. There are three main categories: enum attribute entries,
93 /// represented by Attribute::AttrKind; alignment attribute entries; and string
94 /// attribute enties, which are for target-dependent attributes.
95
96 class EnumAttributeImpl : public AttributeImpl {
97 virtual void anchor();
98 Attribute::AttrKind Kind;
99
100 protected:
101 EnumAttributeImpl(AttrEntryKind ID, Attribute::AttrKind Kind)
102 : AttributeImpl(ID), Kind(Kind) {}
103
104 public:
105 EnumAttributeImpl(Attribute::AttrKind Kind)
106 : AttributeImpl(EnumAttrEntry), Kind(Kind) {}
107
108 Attribute::AttrKind getEnumKind() const { return Kind; }
109 };
110
111 class AlignAttributeImpl : public EnumAttributeImpl {
112 virtual void anchor();
113 unsigned Align;
114
115 public:
116 AlignAttributeImpl(Attribute::AttrKind Kind, unsigned Align)
117 : EnumAttributeImpl(AlignAttrEntry, Kind), Align(Align) {
118 assert(
119 (Kind == Attribute::Alignment || Kind == Attribute::StackAlignment) &&
120 "Wrong kind for alignment attribute!");
121 }
122
123 unsigned getAlignment() const { return Align; }
124 };
125
126 class StringAttributeImpl : public AttributeImpl {
127 virtual void anchor();
128 std::string Kind;
129 std::string Val;
130
131 public:
132 StringAttributeImpl(StringRef Kind, StringRef Val = StringRef())
133 : AttributeImpl(StringAttrEntry), Kind(Kind), Val(Val) {}
134
135 StringRef getStringKind() const { return Kind; }
136 StringRef getStringValue() const { return Val; }
137 };
138
139 //===----------------------------------------------------------------------===//
140 /// \class
141 /// \brief This class represents a group of attributes that apply to one
142 /// element: function, return type, or parameter.
143 class AttributeSetNode : public FoldingSetNode {
144 unsigned NumAttrs; ///< Number of attributes in this node.
145
146 AttributeSetNode(ArrayRef<Attribute> Attrs) : NumAttrs(Attrs.size()) {
147 // There's memory after the node where we can store the entries in.
148 std::copy(Attrs.begin(), Attrs.end(),
149 reinterpret_cast<Attribute *>(this + 1));
150 }
151
152 // AttributesSetNode is uniqued, these should not be publicly available.
153 void operator=(const AttributeSetNode &) LLVM_DELETED_FUNCTION;
154 AttributeSetNode(const AttributeSetNode &) LLVM_DELETED_FUNCTION;
155 public:
156 static AttributeSetNode *get(LLVMContext &C, ArrayRef<Attribute> Attrs);
157
158 bool hasAttribute(Attribute::AttrKind Kind) const;
159 bool hasAttribute(StringRef Kind) const;
160 bool hasAttributes() const { return NumAttrs != 0; }
161
162 Attribute getAttribute(Attribute::AttrKind Kind) const;
163 Attribute getAttribute(StringRef Kind) const;
164
165 unsigned getAlignment() const;
166 unsigned getStackAlignment() const;
167 std::string getAsString(bool InAttrGrp) const;
168
169 typedef const Attribute *iterator;
170 iterator begin() const { return reinterpret_cast<iterator>(this + 1); }
171 iterator end() const { return begin() + NumAttrs; }
172
173 void Profile(FoldingSetNodeID &ID) const {
174 Profile(ID, makeArrayRef(begin(), end()));
175 }
176 static void Profile(FoldingSetNodeID &ID, ArrayRef<Attribute> AttrList) {
177 for (unsigned I = 0, E = AttrList.size(); I != E; ++I)
178 AttrList[I].Profile(ID);
179 }
180 };
181
182 //===----------------------------------------------------------------------===//
183 /// \class
184 /// \brief This class represents a set of attributes that apply to the function,
185 /// return type, and parameters.
186 class AttributeSetImpl : public FoldingSetNode {
187 friend class AttributeSet;
188
189 LLVMContext &Context;
190
191 typedef std::pair<unsigned, AttributeSetNode*> IndexAttrPair;
192 unsigned NumAttrs; ///< Number of entries in this set.
193
194 /// \brief Return a pointer to the IndexAttrPair for the specified slot.
195 const IndexAttrPair *getNode(unsigned Slot) const {
196 return reinterpret_cast<const IndexAttrPair *>(this + 1) + Slot;
197 }
198
199 // AttributesSet is uniqued, these should not be publicly available.
200 void operator=(const AttributeSetImpl &) LLVM_DELETED_FUNCTION;
201 AttributeSetImpl(const AttributeSetImpl &) LLVM_DELETED_FUNCTION;
202 public:
203 AttributeSetImpl(LLVMContext &C,
204 ArrayRef<std::pair<unsigned, AttributeSetNode *> > Attrs)
205 : Context(C), NumAttrs(Attrs.size()) {
206 #ifndef NDEBUG
207 if (Attrs.size() >= 2) {
208 for (const std::pair<unsigned, AttributeSetNode *> *i = Attrs.begin() + 1,
209 *e = Attrs.end();
210 i != e; ++i) {
211 assert((i-1)->first <= i->first && "Attribute set not ordered!");
212 }
213 }
214 #endif
215 // There's memory after the node where we can store the entries in.
216 std::copy(Attrs.begin(), Attrs.end(),
217 reinterpret_cast<IndexAttrPair *>(this + 1));
218 }
219
220 /// \brief Get the context that created this AttributeSetImpl.
221 LLVMContext &getContext() { return Context; }
222
223 /// \brief Return the number of attributes this AttributeSet contains.
224 unsigned getNumAttributes() const { return NumAttrs; }
225
226 /// \brief Get the index of the given "slot" in the AttrNodes list. This index
227 /// is the index of the return, parameter, or function object that the
228 /// attributes are applied to, not the index into the AttrNodes list where the
229 /// attributes reside.
230 unsigned getSlotIndex(unsigned Slot) const {
231 return getNode(Slot)->first;
232 }
233
234 /// \brief Retrieve the attributes for the given "slot" in the AttrNode list.
235 /// \p Slot is an index into the AttrNodes list, not the index of the return /
236 /// parameter/ function which the attributes apply to.
237 AttributeSet getSlotAttributes(unsigned Slot) const {
238 return AttributeSet::get(Context, *getNode(Slot));
239 }
240
241 /// \brief Retrieve the attribute set node for the given "slot" in the
242 /// AttrNode list.
243 AttributeSetNode *getSlotNode(unsigned Slot) const {
244 return getNode(Slot)->second;
245 }
246
247 typedef AttributeSetNode::iterator iterator;
248 iterator begin(unsigned Slot) const { return getSlotNode(Slot)->begin(); }
249 iterator end(unsigned Slot) const { return getSlotNode(Slot)->end(); }
250
251 void Profile(FoldingSetNodeID &ID) const {
252 Profile(ID, makeArrayRef(getNode(0), getNumAttributes()));
253 }
254 static void Profile(FoldingSetNodeID &ID,
255 ArrayRef<std::pair<unsigned, AttributeSetNode*> > Nodes) {
256 for (unsigned i = 0, e = Nodes.size(); i != e; ++i) {
257 ID.AddInteger(Nodes[i].first);
258 ID.AddPointer(Nodes[i].second);
259 }
260 }
261
262 // FIXME: This atrocity is temporary.
263 uint64_t Raw(unsigned Index) const;
264
265 void dump() const;
266 };
267
268 } // end llvm namespace
269
270 #endif