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annotate gen/dvalue.h @ 1151:3cf0066e6faf

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- Versioned Expresssion::toElem with #if IN_DMD/IN_LLVM. - Eliminated the DLRValue DValue. - Implemented proactive handling of l-value CastExpS. - Minor tweak in runtime memory.d .
author Tomas Lindquist Olsen <tomas.l.olsen gmail.com>
date Sat, 28 Mar 2009 05:00:43 +0100
parents 30b42a283c8e
children f5729209a1d4
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1 #ifndef LDC_GEN_DVALUE_H
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2 #define LDC_GEN_DVALUE_H
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3
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4 /*
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5 These classes are used for generating the IR. They encapsulate D values and
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6 provide a common interface to the most common operations. When more specialized
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7 handling is necessary, they hold enough information to do-the-right-thing (TM)
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8 */
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9
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10 #include <cassert>
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11 #include "root.h"
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12
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13 struct Type;
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14 struct Dsymbol;
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15 struct VarDeclaration;
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16 struct FuncDeclaration;
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17
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18 namespace llvm
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19 {
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20 class Value;
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21 class Type;
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22 class Constant;
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23 }
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24
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25 struct DImValue;
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26 struct DConstValue;
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27 struct DNullValue;
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28 struct DVarValue;
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29 struct DFieldValue;
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30 struct DFuncValue;
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31 struct DSliceValue;
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32
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33 // base class for d-values
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34 struct DValue : Object
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35 {
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36 virtual Type*& getType() = 0;
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37
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38 virtual LLValue* getLVal() { assert(0); return 0; }
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39 virtual LLValue* getRVal() { assert(0); return 0; }
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40
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41 virtual bool isLVal() { return false; }
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42
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43 virtual DImValue* isIm() { return NULL; }
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44 virtual DConstValue* isConst() { return NULL; }
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45 virtual DNullValue* isNull() { return NULL; }
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46 virtual DVarValue* isVar() { return NULL; }
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47 virtual DFieldValue* isField() { return NULL; }
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48 virtual DSliceValue* isSlice() { return NULL; }
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49 virtual DFuncValue* isFunc() { return NULL; }
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50
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51 protected:
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52 DValue() {}
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53 DValue(const DValue&) { }
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54 DValue& operator=(const DValue&) { return *this; }
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55 };
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56
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57 // immediate d-value
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58 struct DImValue : DValue
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59 {
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60 Type* type;
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61 LLValue* val;
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62
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63 DImValue(Type* t, LLValue* v) : type(t), val(v) { }
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64
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65 virtual LLValue* getRVal() { assert(val); return val; }
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67 virtual Type*& getType() { assert(type); return type; }
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68 virtual DImValue* isIm() { return this; }
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69 };
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70
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71 // constant d-value
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72 struct DConstValue : DValue
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73 {
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74 Type* type;
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75 LLConstant* c;
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77 DConstValue(Type* t, LLConstant* con) { type = t; c = con; }
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79 virtual LLValue* getRVal();
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81 virtual Type*& getType() { assert(type); return type; }
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82 virtual DConstValue* isConst() { return this; }
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83 };
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84
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85 // null d-value
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86 struct DNullValue : DConstValue
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87 {
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88 DNullValue(Type* t, LLConstant* con) : DConstValue(t,con) {}
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89 virtual DNullValue* isNull() { return this; }
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90 };
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91
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92 // variable d-value
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93 struct DVarValue : DValue
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94 {
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95 Type* type;
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96 VarDeclaration* var;
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97 LLValue* val;
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98
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99 DVarValue(Type* t, VarDeclaration* vd, LLValue* llvmValue);
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100 DVarValue(Type* t, LLValue* llvmValue);
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101
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102 virtual bool isLVal() { return true; }
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103 virtual LLValue* getLVal();
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104 virtual LLValue* getRVal();
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105
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106 virtual Type*& getType() { assert(type); return type; }
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107 virtual DVarValue* isVar() { return this; }
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108 };
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109
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110 // field d-value
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111 struct DFieldValue : DVarValue
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112 {
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113 DFieldValue(Type* t, LLValue* llvmValue) : DVarValue(t, llvmValue) {}
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114 virtual DFieldValue* isField() { return this; }
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115 };
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116
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117 // slice d-value
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118 struct DSliceValue : DValue
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119 {
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120 Type* type;
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121 LLValue* len;
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122 LLValue* ptr;
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123
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124 DSliceValue(Type* t, LLValue* l, LLValue* p) { type=t; ptr=p; len=l; }
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125
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126 virtual LLValue* getRVal();
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127
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128 virtual Type*& getType() { assert(type); return type; }
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129 virtual DSliceValue* isSlice() { return this; }
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130 };
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131
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132 // function d-value
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133 struct DFuncValue : DValue
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134 {
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135 Type* type;
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136 FuncDeclaration* func;
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137 LLValue* val;
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138 LLValue* vthis;
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139
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140 DFuncValue(FuncDeclaration* fd, LLValue* v, LLValue* vt = 0);
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141
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142 virtual LLValue* getRVal();
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143
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932229a851a4 [svn r382] In CastExp, after the cast to CastExp.to force the type to be CastExp.type.
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144 virtual Type*& getType() { assert(type); return type; }
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145 virtual DFuncValue* isFunc() { return this; }
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146 };
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147
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148 #endif // LDC_GEN_DVALUE_H