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