1 | // |
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2 | // Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo |
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3 | // |
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4 | // The contents of this file are covered under the licence agreement in the |
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5 | // file "LICENCE" distributed with Cforall. |
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6 | // |
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7 | // Validate.cc -- |
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8 | // |
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9 | // Author : Richard C. Bilson |
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10 | // Created On : Sun May 17 21:50:04 2015 |
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11 | // Last Modified By : Peter A. Buhr |
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12 | // Last Modified On : Wed Apr 13 16:39:30 2016 |
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13 | // Update Count : 251 |
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14 | // |
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15 | |
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16 | // The "validate" phase of translation is used to take a syntax tree and convert it into a standard form that aims to be |
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17 | // as regular in structure as possible. Some assumptions can be made regarding the state of the tree after this pass is |
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18 | // complete, including: |
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19 | // |
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20 | // - No nested structure or union definitions; any in the input are "hoisted" to the level of the containing struct or |
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21 | // union. |
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22 | // |
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23 | // - All enumeration constants have type EnumInstType. |
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24 | // |
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25 | // - The type "void" never occurs in lists of function parameter or return types; neither do tuple types. A function |
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26 | // taking no arguments has no argument types, and tuples are flattened. |
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27 | // |
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28 | // - No context instances exist; they are all replaced by the set of declarations signified by the context, instantiated |
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29 | // by the particular set of type arguments. |
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30 | // |
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31 | // - Every declaration is assigned a unique id. |
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32 | // |
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33 | // - No typedef declarations or instances exist; the actual type is substituted for each instance. |
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34 | // |
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35 | // - Each type, struct, and union definition is followed by an appropriate assignment operator. |
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36 | // |
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37 | // - Each use of a struct or union is connected to a complete definition of that struct or union, even if that |
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38 | // definition occurs later in the input. |
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39 | |
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40 | #include <list> |
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41 | #include <iterator> |
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42 | #include "Common/utility.h" |
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43 | #include "Common/UniqueName.h" |
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44 | #include "Validate.h" |
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45 | #include "SynTree/Visitor.h" |
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46 | #include "SynTree/Mutator.h" |
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47 | #include "SynTree/Type.h" |
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48 | #include "SynTree/Expression.h" |
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49 | #include "SynTree/Statement.h" |
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50 | #include "SynTree/TypeSubstitution.h" |
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51 | #include "Indexer.h" |
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52 | #include "FixFunction.h" |
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53 | // #include "ImplementationType.h" |
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54 | #include "GenPoly/DeclMutator.h" |
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55 | #include "AddVisit.h" |
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56 | #include "MakeLibCfa.h" |
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57 | #include "TypeEquality.h" |
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58 | #include "ResolvExpr/typeops.h" |
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59 | |
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60 | #define debugPrint( x ) if ( doDebug ) { std::cout << x; } |
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61 | |
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62 | namespace SymTab { |
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63 | class HoistStruct : public Visitor { |
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64 | public: |
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65 | /// Flattens nested struct types |
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66 | static void hoistStruct( std::list< Declaration * > &translationUnit ); |
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67 | |
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68 | std::list< Declaration * > &get_declsToAdd() { return declsToAdd; } |
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69 | |
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70 | virtual void visit( StructDecl *aggregateDecl ); |
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71 | virtual void visit( UnionDecl *aggregateDecl ); |
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72 | |
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73 | virtual void visit( CompoundStmt *compoundStmt ); |
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74 | virtual void visit( SwitchStmt *switchStmt ); |
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75 | virtual void visit( ChooseStmt *chooseStmt ); |
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76 | // virtual void visit( CaseStmt *caseStmt ); |
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77 | private: |
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78 | HoistStruct(); |
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79 | |
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80 | template< typename AggDecl > void handleAggregate( AggDecl *aggregateDecl ); |
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81 | |
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82 | std::list< Declaration * > declsToAdd; |
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83 | bool inStruct; |
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84 | }; |
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85 | |
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86 | /// Replaces enum types by int, and function or array types in function parameter and return lists by appropriate pointers. |
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87 | class Pass1 : public Visitor { |
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88 | typedef Visitor Parent; |
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89 | virtual void visit( EnumDecl *aggregateDecl ); |
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90 | virtual void visit( FunctionType *func ); |
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91 | }; |
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92 | |
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93 | /// Associates forward declarations of aggregates with their definitions |
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94 | class Pass2 : public Indexer { |
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95 | typedef Indexer Parent; |
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96 | public: |
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97 | Pass2( bool doDebug, const Indexer *indexer ); |
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98 | private: |
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99 | virtual void visit( StructInstType *structInst ); |
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100 | virtual void visit( UnionInstType *unionInst ); |
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101 | virtual void visit( TraitInstType *contextInst ); |
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102 | virtual void visit( StructDecl *structDecl ); |
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103 | virtual void visit( UnionDecl *unionDecl ); |
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104 | virtual void visit( TypeInstType *typeInst ); |
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105 | |
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106 | const Indexer *indexer; |
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107 | |
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108 | typedef std::map< std::string, std::list< StructInstType * > > ForwardStructsType; |
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109 | typedef std::map< std::string, std::list< UnionInstType * > > ForwardUnionsType; |
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110 | ForwardStructsType forwardStructs; |
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111 | ForwardUnionsType forwardUnions; |
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112 | }; |
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113 | |
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114 | /// Replaces array and function types in forall lists by appropriate pointer type |
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115 | class Pass3 : public Indexer { |
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116 | typedef Indexer Parent; |
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117 | public: |
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118 | Pass3( const Indexer *indexer ); |
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119 | private: |
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120 | virtual void visit( ObjectDecl *object ); |
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121 | virtual void visit( FunctionDecl *func ); |
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122 | |
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123 | const Indexer *indexer; |
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124 | }; |
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125 | |
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126 | class AutogenerateRoutines : public Visitor { |
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127 | public: |
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128 | /// Generates assignment operators for aggregate types as required |
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129 | static void autogenerateRoutines( std::list< Declaration * > &translationUnit ); |
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130 | |
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131 | std::list< Declaration * > &get_declsToAdd() { return declsToAdd; } |
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132 | |
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133 | virtual void visit( EnumDecl *enumDecl ); |
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134 | virtual void visit( StructDecl *structDecl ); |
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135 | virtual void visit( UnionDecl *structDecl ); |
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136 | virtual void visit( TypeDecl *typeDecl ); |
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137 | virtual void visit( TraitDecl *ctxDecl ); |
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138 | virtual void visit( FunctionDecl *functionDecl ); |
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139 | |
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140 | virtual void visit( FunctionType *ftype ); |
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141 | virtual void visit( PointerType *ftype ); |
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142 | |
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143 | virtual void visit( CompoundStmt *compoundStmt ); |
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144 | virtual void visit( SwitchStmt *switchStmt ); |
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145 | virtual void visit( ChooseStmt *chooseStmt ); |
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146 | // virtual void visit( CaseStmt *caseStmt ); |
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147 | |
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148 | AutogenerateRoutines() : functionNesting( 0 ) {} |
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149 | private: |
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150 | template< typename StmtClass > void visitStatement( StmtClass *stmt ); |
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151 | |
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152 | std::list< Declaration * > declsToAdd; |
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153 | std::set< std::string > structsDone; |
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154 | unsigned int functionNesting; // current level of nested functions |
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155 | }; |
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156 | |
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157 | class ReturnChecker : public Visitor { |
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158 | public: |
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159 | /// Checks that return statements return nothing if their return type is void |
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160 | /// and return something if the return type is non-void. |
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161 | static void checkFunctionReturns( std::list< Declaration * > & translationUnit ); |
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162 | private: |
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163 | virtual void visit( FunctionDecl * functionDecl ); |
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164 | |
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165 | virtual void visit( ReturnStmt * returnStmt ); |
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166 | |
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167 | std::list< DeclarationWithType * > returnVals; |
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168 | }; |
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169 | |
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170 | class EliminateTypedef : public Mutator { |
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171 | public: |
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172 | EliminateTypedef() : scopeLevel( 0 ) {} |
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173 | /// Replaces typedefs by forward declarations |
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174 | static void eliminateTypedef( std::list< Declaration * > &translationUnit ); |
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175 | private: |
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176 | virtual Declaration *mutate( TypedefDecl *typeDecl ); |
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177 | virtual TypeDecl *mutate( TypeDecl *typeDecl ); |
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178 | virtual DeclarationWithType *mutate( FunctionDecl *funcDecl ); |
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179 | virtual DeclarationWithType *mutate( ObjectDecl *objDecl ); |
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180 | virtual CompoundStmt *mutate( CompoundStmt *compoundStmt ); |
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181 | virtual Type *mutate( TypeInstType *aggregateUseType ); |
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182 | virtual Expression *mutate( CastExpr *castExpr ); |
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183 | |
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184 | virtual Declaration *mutate( StructDecl * structDecl ); |
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185 | virtual Declaration *mutate( UnionDecl * unionDecl ); |
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186 | virtual Declaration *mutate( EnumDecl * enumDecl ); |
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187 | virtual Declaration *mutate( TraitDecl * contextDecl ); |
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188 | |
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189 | template<typename AggDecl> |
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190 | AggDecl *handleAggregate( AggDecl * aggDecl ); |
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191 | |
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192 | template<typename AggDecl> |
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193 | void addImplicitTypedef( AggDecl * aggDecl ); |
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194 | |
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195 | typedef std::map< std::string, std::pair< TypedefDecl *, int > > TypedefMap; |
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196 | TypedefMap typedefNames; |
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197 | int scopeLevel; |
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198 | }; |
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199 | |
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200 | class CompoundLiteral : public GenPoly::DeclMutator { |
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201 | DeclarationNode::StorageClass storageclass = DeclarationNode::NoStorageClass; |
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202 | |
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203 | virtual DeclarationWithType * mutate( ObjectDecl *objectDecl ); |
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204 | virtual Expression *mutate( CompoundLiteralExpr *compLitExpr ); |
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205 | }; |
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206 | |
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207 | void validate( std::list< Declaration * > &translationUnit, bool doDebug ) { |
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208 | Pass1 pass1; |
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209 | Pass2 pass2( doDebug, 0 ); |
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210 | Pass3 pass3( 0 ); |
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211 | CompoundLiteral compoundliteral; |
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212 | |
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213 | EliminateTypedef::eliminateTypedef( translationUnit ); |
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214 | HoistStruct::hoistStruct( translationUnit ); |
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215 | acceptAll( translationUnit, pass1 ); |
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216 | acceptAll( translationUnit, pass2 ); |
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217 | ReturnChecker::checkFunctionReturns( translationUnit ); |
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218 | mutateAll( translationUnit, compoundliteral ); |
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219 | AutogenerateRoutines::autogenerateRoutines( translationUnit ); |
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220 | acceptAll( translationUnit, pass3 ); |
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221 | } |
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222 | |
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223 | void validateType( Type *type, const Indexer *indexer ) { |
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224 | Pass1 pass1; |
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225 | Pass2 pass2( false, indexer ); |
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226 | Pass3 pass3( indexer ); |
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227 | type->accept( pass1 ); |
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228 | type->accept( pass2 ); |
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229 | type->accept( pass3 ); |
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230 | } |
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231 | |
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232 | template< typename Visitor > |
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233 | void acceptAndAdd( std::list< Declaration * > &translationUnit, Visitor &visitor, bool addBefore ) { |
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234 | std::list< Declaration * >::iterator i = translationUnit.begin(); |
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235 | while ( i != translationUnit.end() ) { |
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236 | (*i)->accept( visitor ); |
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237 | std::list< Declaration * >::iterator next = i; |
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238 | next++; |
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239 | if ( ! visitor.get_declsToAdd().empty() ) { |
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240 | translationUnit.splice( addBefore ? i : next, visitor.get_declsToAdd() ); |
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241 | } // if |
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242 | i = next; |
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243 | } // while |
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244 | } |
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245 | |
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246 | void HoistStruct::hoistStruct( std::list< Declaration * > &translationUnit ) { |
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247 | HoistStruct hoister; |
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248 | acceptAndAdd( translationUnit, hoister, true ); |
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249 | } |
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250 | |
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251 | HoistStruct::HoistStruct() : inStruct( false ) { |
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252 | } |
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253 | |
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254 | void filter( std::list< Declaration * > &declList, bool (*pred)( Declaration * ), bool doDelete ) { |
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255 | std::list< Declaration * >::iterator i = declList.begin(); |
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256 | while ( i != declList.end() ) { |
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257 | std::list< Declaration * >::iterator next = i; |
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258 | ++next; |
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259 | if ( pred( *i ) ) { |
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260 | if ( doDelete ) { |
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261 | delete *i; |
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262 | } // if |
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263 | declList.erase( i ); |
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264 | } // if |
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265 | i = next; |
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266 | } // while |
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267 | } |
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268 | |
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269 | bool isStructOrUnion( Declaration *decl ) { |
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270 | return dynamic_cast< StructDecl * >( decl ) || dynamic_cast< UnionDecl * >( decl ); |
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271 | } |
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272 | |
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273 | template< typename AggDecl > |
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274 | void HoistStruct::handleAggregate( AggDecl *aggregateDecl ) { |
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275 | if ( inStruct ) { |
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276 | // Add elements in stack order corresponding to nesting structure. |
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277 | declsToAdd.push_front( aggregateDecl ); |
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278 | Visitor::visit( aggregateDecl ); |
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279 | } else { |
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280 | inStruct = true; |
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281 | Visitor::visit( aggregateDecl ); |
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282 | inStruct = false; |
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283 | } // if |
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284 | // Always remove the hoisted aggregate from the inner structure. |
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285 | filter( aggregateDecl->get_members(), isStructOrUnion, false ); |
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286 | } |
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287 | |
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288 | void HoistStruct::visit( StructDecl *aggregateDecl ) { |
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289 | handleAggregate( aggregateDecl ); |
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290 | } |
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291 | |
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292 | void HoistStruct::visit( UnionDecl *aggregateDecl ) { |
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293 | handleAggregate( aggregateDecl ); |
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294 | } |
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295 | |
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296 | void HoistStruct::visit( CompoundStmt *compoundStmt ) { |
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297 | addVisit( compoundStmt, *this ); |
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298 | } |
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299 | |
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300 | void HoistStruct::visit( SwitchStmt *switchStmt ) { |
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301 | addVisit( switchStmt, *this ); |
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302 | } |
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303 | |
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304 | void HoistStruct::visit( ChooseStmt *switchStmt ) { |
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305 | addVisit( switchStmt, *this ); |
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306 | } |
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307 | |
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308 | // void HoistStruct::visit( CaseStmt *caseStmt ) { |
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309 | // addVisit( caseStmt, *this ); |
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310 | // } |
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311 | |
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312 | void Pass1::visit( EnumDecl *enumDecl ) { |
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313 | // Set the type of each member of the enumeration to be EnumConstant |
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314 | |
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315 | for ( std::list< Declaration * >::iterator i = enumDecl->get_members().begin(); i != enumDecl->get_members().end(); ++i ) { |
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316 | ObjectDecl * obj = dynamic_cast< ObjectDecl * >( *i ); |
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317 | assert( obj ); |
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318 | // obj->set_type( new EnumInstType( Type::Qualifiers( true, false, false, false, false, false ), enumDecl->get_name() ) ); |
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319 | BasicType * enumType = new BasicType( Type::Qualifiers(), BasicType::SignedInt ); |
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320 | obj->set_type( enumType ) ; |
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321 | } // for |
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322 | Parent::visit( enumDecl ); |
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323 | } |
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324 | |
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325 | namespace { |
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326 | template< typename DWTIterator > |
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327 | void fixFunctionList( DWTIterator begin, DWTIterator end, FunctionType *func ) { |
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328 | // the only case in which "void" is valid is where it is the only one in the list; then it should be removed |
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329 | // entirely other fix ups are handled by the FixFunction class |
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330 | if ( begin == end ) return; |
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331 | FixFunction fixer; |
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332 | DWTIterator i = begin; |
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333 | *i = (*i )->acceptMutator( fixer ); |
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334 | if ( fixer.get_isVoid() ) { |
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335 | DWTIterator j = i; |
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336 | ++i; |
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337 | func->get_parameters().erase( j ); |
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338 | if ( i != end ) { |
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339 | throw SemanticError( "invalid type void in function type ", func ); |
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340 | } // if |
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341 | } else { |
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342 | ++i; |
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343 | for ( ; i != end; ++i ) { |
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344 | FixFunction fixer; |
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345 | *i = (*i )->acceptMutator( fixer ); |
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346 | if ( fixer.get_isVoid() ) { |
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347 | throw SemanticError( "invalid type void in function type ", func ); |
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348 | } // if |
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349 | } // for |
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350 | } // if |
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351 | } |
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352 | } |
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353 | |
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354 | void Pass1::visit( FunctionType *func ) { |
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355 | // Fix up parameters and return types |
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356 | fixFunctionList( func->get_parameters().begin(), func->get_parameters().end(), func ); |
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357 | fixFunctionList( func->get_returnVals().begin(), func->get_returnVals().end(), func ); |
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358 | Visitor::visit( func ); |
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359 | } |
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360 | |
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361 | Pass2::Pass2( bool doDebug, const Indexer *other_indexer ) : Indexer( doDebug ) { |
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362 | if ( other_indexer ) { |
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363 | indexer = other_indexer; |
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364 | } else { |
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365 | indexer = this; |
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366 | } // if |
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367 | } |
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368 | |
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369 | void Pass2::visit( StructInstType *structInst ) { |
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370 | Parent::visit( structInst ); |
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371 | StructDecl *st = indexer->lookupStruct( structInst->get_name() ); |
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372 | // it's not a semantic error if the struct is not found, just an implicit forward declaration |
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373 | if ( st ) { |
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374 | //assert( ! structInst->get_baseStruct() || structInst->get_baseStruct()->get_members().empty() || ! st->get_members().empty() ); |
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375 | structInst->set_baseStruct( st ); |
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376 | } // if |
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377 | if ( ! st || st->get_members().empty() ) { |
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378 | // use of forward declaration |
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379 | forwardStructs[ structInst->get_name() ].push_back( structInst ); |
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380 | } // if |
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381 | } |
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382 | |
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383 | void Pass2::visit( UnionInstType *unionInst ) { |
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384 | Parent::visit( unionInst ); |
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385 | UnionDecl *un = indexer->lookupUnion( unionInst->get_name() ); |
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386 | // it's not a semantic error if the union is not found, just an implicit forward declaration |
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387 | if ( un ) { |
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388 | unionInst->set_baseUnion( un ); |
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389 | } // if |
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390 | if ( ! un || un->get_members().empty() ) { |
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391 | // use of forward declaration |
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392 | forwardUnions[ unionInst->get_name() ].push_back( unionInst ); |
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393 | } // if |
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394 | } |
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395 | |
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396 | void Pass2::visit( TraitInstType *contextInst ) { |
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397 | Parent::visit( contextInst ); |
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398 | TraitDecl *ctx = indexer->lookupTrait( contextInst->get_name() ); |
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399 | if ( ! ctx ) { |
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400 | throw SemanticError( "use of undeclared context " + contextInst->get_name() ); |
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401 | } // if |
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402 | for ( std::list< TypeDecl * >::const_iterator i = ctx->get_parameters().begin(); i != ctx->get_parameters().end(); ++i ) { |
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403 | for ( std::list< DeclarationWithType * >::const_iterator assert = (*i )->get_assertions().begin(); assert != (*i )->get_assertions().end(); ++assert ) { |
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404 | if ( TraitInstType *otherCtx = dynamic_cast< TraitInstType * >(*assert ) ) { |
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405 | cloneAll( otherCtx->get_members(), contextInst->get_members() ); |
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406 | } else { |
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407 | contextInst->get_members().push_back( (*assert )->clone() ); |
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408 | } // if |
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409 | } // for |
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410 | } // for |
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411 | |
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412 | if ( ctx->get_parameters().size() != contextInst->get_parameters().size() ) { |
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413 | throw SemanticError( "incorrect number of context parameters: ", contextInst ); |
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414 | } // if |
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415 | |
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416 | applySubstitution( ctx->get_parameters().begin(), ctx->get_parameters().end(), contextInst->get_parameters().begin(), ctx->get_members().begin(), ctx->get_members().end(), back_inserter( contextInst->get_members() ) ); |
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417 | } |
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418 | |
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419 | void Pass2::visit( StructDecl *structDecl ) { |
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420 | if ( ! structDecl->get_members().empty() ) { |
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421 | ForwardStructsType::iterator fwds = forwardStructs.find( structDecl->get_name() ); |
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422 | if ( fwds != forwardStructs.end() ) { |
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423 | for ( std::list< StructInstType * >::iterator inst = fwds->second.begin(); inst != fwds->second.end(); ++inst ) { |
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424 | (*inst )->set_baseStruct( structDecl ); |
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425 | } // for |
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426 | forwardStructs.erase( fwds ); |
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427 | } // if |
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428 | } // if |
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429 | Indexer::visit( structDecl ); |
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430 | } |
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431 | |
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432 | void Pass2::visit( UnionDecl *unionDecl ) { |
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433 | if ( ! unionDecl->get_members().empty() ) { |
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434 | ForwardUnionsType::iterator fwds = forwardUnions.find( unionDecl->get_name() ); |
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435 | if ( fwds != forwardUnions.end() ) { |
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436 | for ( std::list< UnionInstType * >::iterator inst = fwds->second.begin(); inst != fwds->second.end(); ++inst ) { |
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437 | (*inst )->set_baseUnion( unionDecl ); |
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438 | } // for |
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439 | forwardUnions.erase( fwds ); |
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440 | } // if |
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441 | } // if |
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442 | Indexer::visit( unionDecl ); |
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443 | } |
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444 | |
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445 | void Pass2::visit( TypeInstType *typeInst ) { |
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446 | if ( NamedTypeDecl *namedTypeDecl = lookupType( typeInst->get_name() ) ) { |
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447 | if ( TypeDecl *typeDecl = dynamic_cast< TypeDecl * >( namedTypeDecl ) ) { |
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448 | typeInst->set_isFtype( typeDecl->get_kind() == TypeDecl::Ftype ); |
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449 | } // if |
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450 | } // if |
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451 | } |
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452 | |
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453 | Pass3::Pass3( const Indexer *other_indexer ) : Indexer( false ) { |
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454 | if ( other_indexer ) { |
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455 | indexer = other_indexer; |
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456 | } else { |
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457 | indexer = this; |
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458 | } // if |
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459 | } |
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460 | |
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461 | /// Fix up assertions |
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462 | void forallFixer( Type *func ) { |
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463 | for ( std::list< TypeDecl * >::iterator type = func->get_forall().begin(); type != func->get_forall().end(); ++type ) { |
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464 | std::list< DeclarationWithType * > toBeDone, nextRound; |
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465 | toBeDone.splice( toBeDone.end(), (*type )->get_assertions() ); |
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466 | while ( ! toBeDone.empty() ) { |
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467 | for ( std::list< DeclarationWithType * >::iterator assertion = toBeDone.begin(); assertion != toBeDone.end(); ++assertion ) { |
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468 | if ( TraitInstType *ctx = dynamic_cast< TraitInstType * >( (*assertion )->get_type() ) ) { |
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469 | for ( std::list< Declaration * >::const_iterator i = ctx->get_members().begin(); i != ctx->get_members().end(); ++i ) { |
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470 | DeclarationWithType *dwt = dynamic_cast< DeclarationWithType * >( *i ); |
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471 | assert( dwt ); |
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472 | nextRound.push_back( dwt->clone() ); |
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473 | } |
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474 | delete ctx; |
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475 | } else { |
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476 | FixFunction fixer; |
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477 | *assertion = (*assertion )->acceptMutator( fixer ); |
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478 | if ( fixer.get_isVoid() ) { |
---|
479 | throw SemanticError( "invalid type void in assertion of function ", func ); |
---|
480 | } |
---|
481 | (*type )->get_assertions().push_back( *assertion ); |
---|
482 | } // if |
---|
483 | } // for |
---|
484 | toBeDone.clear(); |
---|
485 | toBeDone.splice( toBeDone.end(), nextRound ); |
---|
486 | } // while |
---|
487 | } // for |
---|
488 | } |
---|
489 | |
---|
490 | void Pass3::visit( ObjectDecl *object ) { |
---|
491 | forallFixer( object->get_type() ); |
---|
492 | if ( PointerType *pointer = dynamic_cast< PointerType * >( object->get_type() ) ) { |
---|
493 | forallFixer( pointer->get_base() ); |
---|
494 | } // if |
---|
495 | Parent::visit( object ); |
---|
496 | object->fixUniqueId(); |
---|
497 | } |
---|
498 | |
---|
499 | void Pass3::visit( FunctionDecl *func ) { |
---|
500 | forallFixer( func->get_type() ); |
---|
501 | Parent::visit( func ); |
---|
502 | func->fixUniqueId(); |
---|
503 | } |
---|
504 | |
---|
505 | static const std::list< std::string > noLabels; |
---|
506 | |
---|
507 | void AutogenerateRoutines::autogenerateRoutines( std::list< Declaration * > &translationUnit ) { |
---|
508 | AutogenerateRoutines visitor; |
---|
509 | acceptAndAdd( translationUnit, visitor, false ); |
---|
510 | } |
---|
511 | |
---|
512 | template< typename OutputIterator > |
---|
513 | void makeScalarAssignment( ObjectDecl *srcParam, ObjectDecl *dstParam, DeclarationWithType *member, OutputIterator out ) { |
---|
514 | ObjectDecl *obj = dynamic_cast<ObjectDecl *>( member ); |
---|
515 | // unnamed bit fields are not copied as they cannot be accessed |
---|
516 | if ( obj != NULL && obj->get_name() == "" && obj->get_bitfieldWidth() != NULL ) return; |
---|
517 | |
---|
518 | UntypedExpr *assignExpr = new UntypedExpr( new NameExpr( "?=?" ) ); |
---|
519 | |
---|
520 | UntypedExpr *derefExpr = new UntypedExpr( new NameExpr( "*?" ) ); |
---|
521 | derefExpr->get_args().push_back( new VariableExpr( dstParam ) ); |
---|
522 | |
---|
523 | // do something special for unnamed members |
---|
524 | Expression *dstselect = new AddressExpr( new MemberExpr( member, derefExpr ) ); |
---|
525 | assignExpr->get_args().push_back( dstselect ); |
---|
526 | |
---|
527 | Expression *srcselect = new MemberExpr( member, new VariableExpr( srcParam ) ); |
---|
528 | assignExpr->get_args().push_back( srcselect ); |
---|
529 | |
---|
530 | *out++ = new ExprStmt( noLabels, assignExpr ); |
---|
531 | } |
---|
532 | |
---|
533 | template< typename OutputIterator > |
---|
534 | void makeArrayAssignment( ObjectDecl *srcParam, ObjectDecl *dstParam, DeclarationWithType *member, ArrayType *array, OutputIterator out ) { |
---|
535 | static UniqueName indexName( "_index" ); |
---|
536 | |
---|
537 | // for a flexible array member nothing is done -- user must define own assignment |
---|
538 | if ( ! array->get_dimension() ) return; |
---|
539 | |
---|
540 | ObjectDecl *index = new ObjectDecl( indexName.newName(), DeclarationNode::NoStorageClass, LinkageSpec::C, 0, new BasicType( Type::Qualifiers(), BasicType::SignedInt ), 0 ); |
---|
541 | *out++ = new DeclStmt( noLabels, index ); |
---|
542 | |
---|
543 | UntypedExpr *init = new UntypedExpr( new NameExpr( "?=?" ) ); |
---|
544 | init->get_args().push_back( new AddressExpr( new VariableExpr( index ) ) ); |
---|
545 | init->get_args().push_back( new NameExpr( "0" ) ); |
---|
546 | Statement *initStmt = new ExprStmt( noLabels, init ); |
---|
547 | std::list<Statement *> initList; |
---|
548 | initList.push_back( initStmt ); |
---|
549 | |
---|
550 | UntypedExpr *cond = new UntypedExpr( new NameExpr( "?<?" ) ); |
---|
551 | cond->get_args().push_back( new VariableExpr( index ) ); |
---|
552 | cond->get_args().push_back( array->get_dimension()->clone() ); |
---|
553 | |
---|
554 | UntypedExpr *inc = new UntypedExpr( new NameExpr( "++?" ) ); |
---|
555 | inc->get_args().push_back( new AddressExpr( new VariableExpr( index ) ) ); |
---|
556 | |
---|
557 | UntypedExpr *assignExpr = new UntypedExpr( new NameExpr( "?=?" ) ); |
---|
558 | |
---|
559 | UntypedExpr *derefExpr = new UntypedExpr( new NameExpr( "*?" ) ); |
---|
560 | derefExpr->get_args().push_back( new VariableExpr( dstParam ) ); |
---|
561 | |
---|
562 | Expression *dstselect = new MemberExpr( member, derefExpr ); |
---|
563 | UntypedExpr *dstIndex = new UntypedExpr( new NameExpr( "?+?" ) ); |
---|
564 | dstIndex->get_args().push_back( dstselect ); |
---|
565 | dstIndex->get_args().push_back( new VariableExpr( index ) ); |
---|
566 | assignExpr->get_args().push_back( dstIndex ); |
---|
567 | |
---|
568 | Expression *srcselect = new MemberExpr( member, new VariableExpr( srcParam ) ); |
---|
569 | UntypedExpr *srcIndex = new UntypedExpr( new NameExpr( "?[?]" ) ); |
---|
570 | srcIndex->get_args().push_back( srcselect ); |
---|
571 | srcIndex->get_args().push_back( new VariableExpr( index ) ); |
---|
572 | assignExpr->get_args().push_back( srcIndex ); |
---|
573 | |
---|
574 | *out++ = new ForStmt( noLabels, initList, cond, inc, new ExprStmt( noLabels, assignExpr ) ); |
---|
575 | } |
---|
576 | |
---|
577 | template< typename OutputIterator > |
---|
578 | void makeUnionFieldsAssignment( ObjectDecl *srcParam, ObjectDecl *dstParam, UnionInstType *unionType, OutputIterator out ) { |
---|
579 | UntypedExpr *copy = new UntypedExpr( new NameExpr( "__builtin_memcpy" ) ); |
---|
580 | copy->get_args().push_back( new VariableExpr( dstParam ) ); |
---|
581 | copy->get_args().push_back( new AddressExpr( new VariableExpr( srcParam ) ) ); |
---|
582 | copy->get_args().push_back( new SizeofExpr( unionType ) ); |
---|
583 | |
---|
584 | *out++ = new ExprStmt( noLabels, copy ); |
---|
585 | } |
---|
586 | |
---|
587 | //E ?=?(E volatile*, int), |
---|
588 | // ?=?(E _Atomic volatile*, int); |
---|
589 | void makeEnumAssignment( EnumDecl *enumDecl, EnumInstType *refType, unsigned int functionNesting, std::list< Declaration * > &declsToAdd ) { |
---|
590 | FunctionType *assignType = new FunctionType( Type::Qualifiers(), false ); |
---|
591 | |
---|
592 | ObjectDecl *returnVal = new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, refType->clone(), 0 ); |
---|
593 | assignType->get_returnVals().push_back( returnVal ); |
---|
594 | |
---|
595 | // need two assignment operators with different types |
---|
596 | FunctionType * assignType2 = assignType->clone(); |
---|
597 | |
---|
598 | // E ?=?(E volatile *, E) |
---|
599 | Type *etype = refType->clone(); |
---|
600 | // etype->get_qualifiers() += Type::Qualifiers(false, true, false, false, false, false); |
---|
601 | |
---|
602 | ObjectDecl *dstParam = new ObjectDecl( "_dst", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), etype ), 0 ); |
---|
603 | assignType->get_parameters().push_back( dstParam ); |
---|
604 | |
---|
605 | ObjectDecl *srcParam = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, etype->clone(), 0 ); |
---|
606 | assignType->get_parameters().push_back( srcParam ); |
---|
607 | |
---|
608 | // E ?=?(E volatile *, int) |
---|
609 | assignType2->get_parameters().push_back( dstParam->clone() ); |
---|
610 | BasicType * paramType = new BasicType(Type::Qualifiers(), BasicType::SignedInt); |
---|
611 | ObjectDecl *srcParam2 = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, paramType, 0 ); |
---|
612 | assignType2->get_parameters().push_back( srcParam2 ); |
---|
613 | |
---|
614 | // Routines at global scope marked "static" to prevent multiple definitions is separate translation units |
---|
615 | // because each unit generates copies of the default routines for each aggregate. |
---|
616 | |
---|
617 | // since there is no definition, these should not be inline |
---|
618 | // make these intrinsic so that the code generator does not make use of them |
---|
619 | FunctionDecl *assignDecl = new FunctionDecl( "?=?", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::Intrinsic, assignType, 0, false, false ); |
---|
620 | assignDecl->fixUniqueId(); |
---|
621 | FunctionDecl *assignDecl2 = new FunctionDecl( "?=?", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::Intrinsic, assignType2, 0, false, false ); |
---|
622 | assignDecl2->fixUniqueId(); |
---|
623 | |
---|
624 | // these should be built in the same way that the prelude |
---|
625 | // functions are, so build a list containing the prototypes |
---|
626 | // and allow MakeLibCfa to autogenerate the bodies. |
---|
627 | std::list< Declaration * > assigns; |
---|
628 | assigns.push_back( assignDecl ); |
---|
629 | assigns.push_back( assignDecl2 ); |
---|
630 | |
---|
631 | LibCfa::makeLibCfa( assigns ); |
---|
632 | |
---|
633 | // need to remove the prototypes, since this may be nested in a routine |
---|
634 | for (int start = 0, end = assigns.size()/2; start < end; start++) { |
---|
635 | delete assigns.front(); |
---|
636 | assigns.pop_front(); |
---|
637 | } // for |
---|
638 | |
---|
639 | declsToAdd.insert( declsToAdd.begin(), assigns.begin(), assigns.end() ); |
---|
640 | } |
---|
641 | |
---|
642 | /// Clones a reference type, replacing any parameters it may have with a clone of the provided list |
---|
643 | template< typename GenericInstType > |
---|
644 | GenericInstType *cloneWithParams( GenericInstType *refType, const std::list< Expression* >& params ) { |
---|
645 | GenericInstType *clone = refType->clone(); |
---|
646 | clone->get_parameters().clear(); |
---|
647 | cloneAll( params, clone->get_parameters() ); |
---|
648 | return clone; |
---|
649 | } |
---|
650 | |
---|
651 | /// Creates a new type decl that's the same as src, but renamed and with only the ?=? assertion (for complete types only) |
---|
652 | TypeDecl *cloneAndRename( TypeDecl *src, const std::string &name ) { |
---|
653 | TypeDecl *dst = new TypeDecl( name, src->get_storageClass(), 0, src->get_kind() ); |
---|
654 | |
---|
655 | if ( src->get_kind() == TypeDecl::Any ) { |
---|
656 | // just include assignment operator assertion |
---|
657 | TypeInstType *assignParamType = new TypeInstType( Type::Qualifiers(), name, dst ); |
---|
658 | FunctionType *assignFunctionType = new FunctionType( Type::Qualifiers(), false ); |
---|
659 | assignFunctionType->get_returnVals().push_back( |
---|
660 | new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, assignParamType->clone(), 0 ) ); |
---|
661 | assignFunctionType->get_parameters().push_back( |
---|
662 | new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), assignParamType->clone() ), 0 ) ); |
---|
663 | assignFunctionType->get_parameters().push_back( |
---|
664 | new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, assignParamType, 0 ) ); |
---|
665 | FunctionDecl *assignAssert = new FunctionDecl( "?=?", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, assignFunctionType, 0, false, false ); |
---|
666 | dst->get_assertions().push_back( assignAssert ); |
---|
667 | } |
---|
668 | |
---|
669 | return dst; |
---|
670 | } |
---|
671 | |
---|
672 | Declaration *makeStructAssignment( StructDecl *aggregateDecl, StructInstType *refType, unsigned int functionNesting ) { |
---|
673 | FunctionType *assignType = new FunctionType( Type::Qualifiers(), false ); |
---|
674 | |
---|
675 | // Make function polymorphic in same parameters as generic struct, if applicable |
---|
676 | bool isGeneric = false; // NOTE this flag is an incredibly ugly kludge; we should fix the assignment signature instead (ditto for union) |
---|
677 | std::list< TypeDecl* >& genericParams = aggregateDecl->get_parameters(); |
---|
678 | std::list< Expression* > structParams; // List of matching parameters to put on types |
---|
679 | TypeSubstitution genericSubs; // Substitutions to make to member types of struct |
---|
680 | for ( std::list< TypeDecl* >::const_iterator param = genericParams.begin(); param != genericParams.end(); ++param ) { |
---|
681 | isGeneric = true; |
---|
682 | TypeDecl *typeParam = cloneAndRename( *param, "_autoassign_" + aggregateDecl->get_name() + "_" + (*param)->get_name() ); |
---|
683 | assignType->get_forall().push_back( typeParam ); |
---|
684 | TypeInstType *newParamType = new TypeInstType( Type::Qualifiers(), typeParam->get_name(), typeParam ); |
---|
685 | genericSubs.add( (*param)->get_name(), newParamType ); |
---|
686 | structParams.push_back( new TypeExpr( newParamType ) ); |
---|
687 | } |
---|
688 | |
---|
689 | ObjectDecl *returnVal = new ObjectDecl( "_ret", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, cloneWithParams( refType, structParams ), 0 ); |
---|
690 | assignType->get_returnVals().push_back( returnVal ); |
---|
691 | |
---|
692 | ObjectDecl *dstParam = new ObjectDecl( "_dst", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), cloneWithParams( refType, structParams ) ), 0 ); |
---|
693 | assignType->get_parameters().push_back( dstParam ); |
---|
694 | |
---|
695 | ObjectDecl *srcParam = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, cloneWithParams( refType, structParams ), 0 ); |
---|
696 | assignType->get_parameters().push_back( srcParam ); |
---|
697 | |
---|
698 | // Routines at global scope marked "static" to prevent multiple definitions is separate translation units |
---|
699 | // because each unit generates copies of the default routines for each aggregate. |
---|
700 | FunctionDecl *assignDecl = new FunctionDecl( "?=?", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, assignType, new CompoundStmt( noLabels ), true, false ); |
---|
701 | assignDecl->fixUniqueId(); |
---|
702 | |
---|
703 | for ( std::list< Declaration * >::const_iterator member = aggregateDecl->get_members().begin(); member != aggregateDecl->get_members().end(); ++member ) { |
---|
704 | if ( DeclarationWithType *dwt = dynamic_cast< DeclarationWithType * >( *member ) ) { |
---|
705 | // query the type qualifiers of this field and skip assigning it if it is marked const. |
---|
706 | // If it is an array type, we need to strip off the array layers to find its qualifiers. |
---|
707 | Type * type = dwt->get_type(); |
---|
708 | while ( ArrayType * at = dynamic_cast< ArrayType * >( type ) ) { |
---|
709 | type = at->get_base(); |
---|
710 | } |
---|
711 | |
---|
712 | if ( type->get_qualifiers().isConst ) { |
---|
713 | // don't assign const members |
---|
714 | continue; |
---|
715 | } |
---|
716 | |
---|
717 | if ( isGeneric ) { |
---|
718 | // rewrite member type in terms of the type variables on this operator |
---|
719 | DeclarationWithType *fixedMember = dwt->clone(); |
---|
720 | genericSubs.apply( fixedMember ); |
---|
721 | |
---|
722 | // assign to both destination and return value |
---|
723 | if ( ArrayType *array = dynamic_cast< ArrayType * >( fixedMember->get_type() ) ) { |
---|
724 | makeArrayAssignment( srcParam, dstParam, fixedMember, array, back_inserter( assignDecl->get_statements()->get_kids() ) ); |
---|
725 | makeArrayAssignment( srcParam, returnVal, fixedMember, array, back_inserter( assignDecl->get_statements()->get_kids() ) ); |
---|
726 | } else { |
---|
727 | makeScalarAssignment( srcParam, dstParam, fixedMember, back_inserter( assignDecl->get_statements()->get_kids() ) ); |
---|
728 | makeScalarAssignment( srcParam, returnVal, fixedMember, back_inserter( assignDecl->get_statements()->get_kids() ) ); |
---|
729 | } // if |
---|
730 | } else { |
---|
731 | // assign to destination |
---|
732 | if ( ArrayType *array = dynamic_cast< ArrayType * >( dwt->get_type() ) ) { |
---|
733 | makeArrayAssignment( srcParam, dstParam, dwt, array, back_inserter( assignDecl->get_statements()->get_kids() ) ); |
---|
734 | } else { |
---|
735 | makeScalarAssignment( srcParam, dstParam, dwt, back_inserter( assignDecl->get_statements()->get_kids() ) ); |
---|
736 | } // if |
---|
737 | } // if |
---|
738 | } // if |
---|
739 | } // for |
---|
740 | if ( ! isGeneric ) assignDecl->get_statements()->get_kids().push_back( new ReturnStmt( noLabels, new VariableExpr( srcParam ) ) ); |
---|
741 | |
---|
742 | return assignDecl; |
---|
743 | } |
---|
744 | |
---|
745 | Declaration *makeUnionAssignment( UnionDecl *aggregateDecl, UnionInstType *refType, unsigned int functionNesting ) { |
---|
746 | FunctionType *assignType = new FunctionType( Type::Qualifiers(), false ); |
---|
747 | |
---|
748 | // Make function polymorphic in same parameters as generic union, if applicable |
---|
749 | bool isGeneric = false; // NOTE this flag is an incredibly ugly kludge; we should fix the assignment signature instead (ditto for struct) |
---|
750 | std::list< TypeDecl* >& genericParams = aggregateDecl->get_parameters(); |
---|
751 | std::list< Expression* > unionParams; // List of matching parameters to put on types |
---|
752 | for ( std::list< TypeDecl* >::const_iterator param = genericParams.begin(); param != genericParams.end(); ++param ) { |
---|
753 | isGeneric = true; |
---|
754 | TypeDecl *typeParam = cloneAndRename( *param, "_autoassign_" + aggregateDecl->get_name() + "_" + (*param)->get_name() ); |
---|
755 | assignType->get_forall().push_back( typeParam ); |
---|
756 | unionParams.push_back( new TypeExpr( new TypeInstType( Type::Qualifiers(), typeParam->get_name(), typeParam ) ) ); |
---|
757 | } |
---|
758 | |
---|
759 | ObjectDecl *returnVal = new ObjectDecl( "_ret", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, cloneWithParams( refType, unionParams ), 0 ); |
---|
760 | assignType->get_returnVals().push_back( returnVal ); |
---|
761 | |
---|
762 | ObjectDecl *dstParam = new ObjectDecl( "_dst", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), cloneWithParams( refType, unionParams ) ), 0 ); |
---|
763 | assignType->get_parameters().push_back( dstParam ); |
---|
764 | |
---|
765 | ObjectDecl *srcParam = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, cloneWithParams( refType, unionParams ), 0 ); |
---|
766 | assignType->get_parameters().push_back( srcParam ); |
---|
767 | |
---|
768 | // Routines at global scope marked "static" to prevent multiple definitions is separate translation units |
---|
769 | // because each unit generates copies of the default routines for each aggregate. |
---|
770 | FunctionDecl *assignDecl = new FunctionDecl( "?=?", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, assignType, new CompoundStmt( noLabels ), true, false ); |
---|
771 | assignDecl->fixUniqueId(); |
---|
772 | |
---|
773 | makeUnionFieldsAssignment( srcParam, dstParam, cloneWithParams( refType, unionParams ), back_inserter( assignDecl->get_statements()->get_kids() ) ); |
---|
774 | if ( isGeneric ) makeUnionFieldsAssignment( srcParam, returnVal, cloneWithParams( refType, unionParams ), back_inserter( assignDecl->get_statements()->get_kids() ) ); |
---|
775 | |
---|
776 | if ( ! isGeneric ) assignDecl->get_statements()->get_kids().push_back( new ReturnStmt( noLabels, new VariableExpr( srcParam ) ) ); |
---|
777 | |
---|
778 | return assignDecl; |
---|
779 | } |
---|
780 | |
---|
781 | void AutogenerateRoutines::visit( EnumDecl *enumDecl ) { |
---|
782 | if ( ! enumDecl->get_members().empty() ) { |
---|
783 | EnumInstType *enumInst = new EnumInstType( Type::Qualifiers(), enumDecl->get_name() ); |
---|
784 | // enumInst->set_baseEnum( enumDecl ); |
---|
785 | // declsToAdd.push_back( |
---|
786 | makeEnumAssignment( enumDecl, enumInst, functionNesting, declsToAdd ); |
---|
787 | } |
---|
788 | } |
---|
789 | |
---|
790 | void AutogenerateRoutines::visit( StructDecl *structDecl ) { |
---|
791 | if ( ! structDecl->get_members().empty() && structsDone.find( structDecl->get_name() ) == structsDone.end() ) { |
---|
792 | StructInstType structInst( Type::Qualifiers(), structDecl->get_name() ); |
---|
793 | structInst.set_baseStruct( structDecl ); |
---|
794 | declsToAdd.push_back( makeStructAssignment( structDecl, &structInst, functionNesting ) ); |
---|
795 | structsDone.insert( structDecl->get_name() ); |
---|
796 | } // if |
---|
797 | } |
---|
798 | |
---|
799 | void AutogenerateRoutines::visit( UnionDecl *unionDecl ) { |
---|
800 | if ( ! unionDecl->get_members().empty() ) { |
---|
801 | UnionInstType unionInst( Type::Qualifiers(), unionDecl->get_name() ); |
---|
802 | unionInst.set_baseUnion( unionDecl ); |
---|
803 | declsToAdd.push_back( makeUnionAssignment( unionDecl, &unionInst, functionNesting ) ); |
---|
804 | } // if |
---|
805 | } |
---|
806 | |
---|
807 | void AutogenerateRoutines::visit( TypeDecl *typeDecl ) { |
---|
808 | CompoundStmt *stmts = 0; |
---|
809 | TypeInstType *typeInst = new TypeInstType( Type::Qualifiers(), typeDecl->get_name(), false ); |
---|
810 | typeInst->set_baseType( typeDecl ); |
---|
811 | ObjectDecl *src = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, typeInst->clone(), 0 ); |
---|
812 | ObjectDecl *dst = new ObjectDecl( "_dst", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), typeInst->clone() ), 0 ); |
---|
813 | if ( typeDecl->get_base() ) { |
---|
814 | stmts = new CompoundStmt( std::list< Label >() ); |
---|
815 | UntypedExpr *assign = new UntypedExpr( new NameExpr( "?=?" ) ); |
---|
816 | assign->get_args().push_back( new CastExpr( new VariableExpr( dst ), new PointerType( Type::Qualifiers(), typeDecl->get_base()->clone() ) ) ); |
---|
817 | assign->get_args().push_back( new CastExpr( new VariableExpr( src ), typeDecl->get_base()->clone() ) ); |
---|
818 | stmts->get_kids().push_back( new ReturnStmt( std::list< Label >(), assign ) ); |
---|
819 | } // if |
---|
820 | FunctionType *type = new FunctionType( Type::Qualifiers(), false ); |
---|
821 | type->get_returnVals().push_back( new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, typeInst, 0 ) ); |
---|
822 | type->get_parameters().push_back( dst ); |
---|
823 | type->get_parameters().push_back( src ); |
---|
824 | FunctionDecl *func = new FunctionDecl( "?=?", DeclarationNode::NoStorageClass, LinkageSpec::AutoGen, type, stmts, false, false ); |
---|
825 | declsToAdd.push_back( func ); |
---|
826 | } |
---|
827 | |
---|
828 | void addDecls( std::list< Declaration * > &declsToAdd, std::list< Statement * > &statements, std::list< Statement * >::iterator i ) { |
---|
829 | for ( std::list< Declaration * >::iterator decl = declsToAdd.begin(); decl != declsToAdd.end(); ++decl ) { |
---|
830 | statements.insert( i, new DeclStmt( noLabels, *decl ) ); |
---|
831 | } // for |
---|
832 | declsToAdd.clear(); |
---|
833 | } |
---|
834 | |
---|
835 | void AutogenerateRoutines::visit( FunctionType *) { |
---|
836 | // ensure that we don't add assignment ops for types defined as part of the function |
---|
837 | } |
---|
838 | |
---|
839 | void AutogenerateRoutines::visit( PointerType *) { |
---|
840 | // ensure that we don't add assignment ops for types defined as part of the pointer |
---|
841 | } |
---|
842 | |
---|
843 | void AutogenerateRoutines::visit( TraitDecl *) { |
---|
844 | // ensure that we don't add assignment ops for types defined as part of the context |
---|
845 | } |
---|
846 | |
---|
847 | template< typename StmtClass > |
---|
848 | inline void AutogenerateRoutines::visitStatement( StmtClass *stmt ) { |
---|
849 | std::set< std::string > oldStructs = structsDone; |
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850 | addVisit( stmt, *this ); |
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851 | structsDone = oldStructs; |
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852 | } |
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853 | |
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854 | void AutogenerateRoutines::visit( FunctionDecl *functionDecl ) { |
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855 | maybeAccept( functionDecl->get_functionType(), *this ); |
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856 | acceptAll( functionDecl->get_oldDecls(), *this ); |
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857 | functionNesting += 1; |
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858 | maybeAccept( functionDecl->get_statements(), *this ); |
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859 | functionNesting -= 1; |
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860 | } |
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861 | |
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862 | void AutogenerateRoutines::visit( CompoundStmt *compoundStmt ) { |
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863 | visitStatement( compoundStmt ); |
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864 | } |
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865 | |
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866 | void AutogenerateRoutines::visit( SwitchStmt *switchStmt ) { |
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867 | visitStatement( switchStmt ); |
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868 | } |
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869 | |
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870 | void AutogenerateRoutines::visit( ChooseStmt *switchStmt ) { |
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871 | visitStatement( switchStmt ); |
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872 | } |
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873 | |
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874 | // void AutogenerateRoutines::visit( CaseStmt *caseStmt ) { |
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875 | // visitStatement( caseStmt ); |
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876 | // } |
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877 | |
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878 | void ReturnChecker::checkFunctionReturns( std::list< Declaration * > & translationUnit ) { |
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879 | ReturnChecker checker; |
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880 | acceptAll( translationUnit, checker ); |
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881 | } |
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882 | |
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883 | void ReturnChecker::visit( FunctionDecl * functionDecl ) { |
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884 | std::list< DeclarationWithType * > oldReturnVals = returnVals; |
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885 | returnVals = functionDecl->get_functionType()->get_returnVals(); |
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886 | Visitor::visit( functionDecl ); |
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887 | returnVals = oldReturnVals; |
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888 | } |
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889 | |
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890 | void ReturnChecker::visit( ReturnStmt * returnStmt ) { |
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891 | if ( returnStmt->get_expr() == NULL && returnVals.size() != 0 ) { |
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892 | throw SemanticError( "Non-void function returns no values: " , returnStmt ); |
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893 | } else if ( returnStmt->get_expr() != NULL && returnVals.size() == 0 ) { |
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894 | throw SemanticError( "void function returns values: " , returnStmt ); |
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895 | } |
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896 | } |
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897 | |
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898 | |
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899 | bool isTypedef( Declaration *decl ) { |
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900 | return dynamic_cast< TypedefDecl * >( decl ); |
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901 | } |
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902 | |
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903 | void EliminateTypedef::eliminateTypedef( std::list< Declaration * > &translationUnit ) { |
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904 | EliminateTypedef eliminator; |
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905 | mutateAll( translationUnit, eliminator ); |
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906 | filter( translationUnit, isTypedef, true ); |
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907 | } |
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908 | |
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909 | Type *EliminateTypedef::mutate( TypeInstType * typeInst ) { |
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910 | // instances of typedef types will come here. If it is an instance |
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911 | // of a typdef type, link the instance to its actual type. |
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912 | TypedefMap::const_iterator def = typedefNames.find( typeInst->get_name() ); |
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913 | if ( def != typedefNames.end() ) { |
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914 | Type *ret = def->second.first->get_base()->clone(); |
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915 | ret->get_qualifiers() += typeInst->get_qualifiers(); |
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916 | // place instance parameters on the typedef'd type |
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917 | if ( ! typeInst->get_parameters().empty() ) { |
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918 | ReferenceToType *rtt = dynamic_cast<ReferenceToType*>(ret); |
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919 | if ( ! rtt ) { |
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920 | throw SemanticError("cannot apply type parameters to base type of " + typeInst->get_name()); |
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921 | } |
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922 | rtt->get_parameters().clear(); |
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923 | cloneAll(typeInst->get_parameters(), rtt->get_parameters()); |
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924 | } // if |
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925 | delete typeInst; |
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926 | return ret; |
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927 | } // if |
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928 | return typeInst; |
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929 | } |
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930 | |
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931 | Declaration *EliminateTypedef::mutate( TypedefDecl * tyDecl ) { |
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932 | Declaration *ret = Mutator::mutate( tyDecl ); |
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933 | if ( typedefNames.count( tyDecl->get_name() ) == 1 && typedefNames[ tyDecl->get_name() ].second == scopeLevel ) { |
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934 | // typedef to the same name from the same scope |
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935 | // must be from the same type |
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936 | |
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937 | Type * t1 = tyDecl->get_base(); |
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938 | Type * t2 = typedefNames[ tyDecl->get_name() ].first->get_base(); |
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939 | if ( ! ResolvExpr::typesCompatible( t1, t2, Indexer() ) ) { |
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940 | throw SemanticError( "cannot redefine typedef: " + tyDecl->get_name() ); |
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941 | } |
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942 | } else { |
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943 | typedefNames[ tyDecl->get_name() ] = std::make_pair( tyDecl, scopeLevel ); |
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944 | } // if |
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945 | |
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946 | // When a typedef is a forward declaration: |
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947 | // typedef struct screen SCREEN; |
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948 | // the declaration portion must be retained: |
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949 | // struct screen; |
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950 | // because the expansion of the typedef is: |
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951 | // void rtn( SCREEN *p ) => void rtn( struct screen *p ) |
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952 | // hence the type-name "screen" must be defined. |
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953 | // Note, qualifiers on the typedef are superfluous for the forward declaration. |
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954 | if ( StructInstType *aggDecl = dynamic_cast< StructInstType * >( tyDecl->get_base() ) ) { |
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955 | return new StructDecl( aggDecl->get_name() ); |
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956 | } else if ( UnionInstType *aggDecl = dynamic_cast< UnionInstType * >( tyDecl->get_base() ) ) { |
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957 | return new UnionDecl( aggDecl->get_name() ); |
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958 | } else { |
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959 | return ret; |
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960 | } // if |
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961 | } |
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962 | |
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963 | TypeDecl *EliminateTypedef::mutate( TypeDecl * typeDecl ) { |
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964 | TypedefMap::iterator i = typedefNames.find( typeDecl->get_name() ); |
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965 | if ( i != typedefNames.end() ) { |
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966 | typedefNames.erase( i ) ; |
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967 | } // if |
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968 | return typeDecl; |
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969 | } |
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970 | |
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971 | DeclarationWithType *EliminateTypedef::mutate( FunctionDecl * funcDecl ) { |
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972 | TypedefMap oldNames = typedefNames; |
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973 | DeclarationWithType *ret = Mutator::mutate( funcDecl ); |
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974 | typedefNames = oldNames; |
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975 | return ret; |
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976 | } |
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977 | |
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978 | DeclarationWithType *EliminateTypedef::mutate( ObjectDecl * objDecl ) { |
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979 | TypedefMap oldNames = typedefNames; |
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980 | DeclarationWithType *ret = Mutator::mutate( objDecl ); |
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981 | typedefNames = oldNames; |
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982 | // is the type a function? |
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983 | if ( FunctionType *funtype = dynamic_cast<FunctionType *>( ret->get_type() ) ) { |
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984 | // replace the current object declaration with a function declaration |
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985 | return new FunctionDecl( ret->get_name(), ret->get_storageClass(), ret->get_linkage(), funtype, 0, ret->get_isInline(), ret->get_isNoreturn() ); |
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986 | } else if ( objDecl->get_isInline() || objDecl->get_isNoreturn() ) { |
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987 | throw SemanticError( "invalid inline or _Noreturn specification in declaration of ", objDecl ); |
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988 | } // if |
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989 | return ret; |
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990 | } |
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991 | |
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992 | Expression *EliminateTypedef::mutate( CastExpr * castExpr ) { |
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993 | TypedefMap oldNames = typedefNames; |
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994 | Expression *ret = Mutator::mutate( castExpr ); |
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995 | typedefNames = oldNames; |
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996 | return ret; |
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997 | } |
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998 | |
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999 | CompoundStmt *EliminateTypedef::mutate( CompoundStmt * compoundStmt ) { |
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1000 | TypedefMap oldNames = typedefNames; |
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1001 | scopeLevel += 1; |
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1002 | CompoundStmt *ret = Mutator::mutate( compoundStmt ); |
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1003 | scopeLevel -= 1; |
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1004 | std::list< Statement * >::iterator i = compoundStmt->get_kids().begin(); |
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1005 | while ( i != compoundStmt->get_kids().end() ) { |
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1006 | std::list< Statement * >::iterator next = i+1; |
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1007 | if ( DeclStmt *declStmt = dynamic_cast< DeclStmt * >( *i ) ) { |
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1008 | if ( dynamic_cast< TypedefDecl * >( declStmt->get_decl() ) ) { |
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1009 | delete *i; |
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1010 | compoundStmt->get_kids().erase( i ); |
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1011 | } // if |
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1012 | } // if |
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1013 | i = next; |
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1014 | } // while |
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1015 | typedefNames = oldNames; |
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1016 | return ret; |
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1017 | } |
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1018 | |
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1019 | // there may be typedefs nested within aggregates in order for everything to work properly, these should be removed |
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1020 | // as well |
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1021 | template<typename AggDecl> |
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1022 | AggDecl *EliminateTypedef::handleAggregate( AggDecl * aggDecl ) { |
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1023 | std::list<Declaration *>::iterator it = aggDecl->get_members().begin(); |
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1024 | for ( ; it != aggDecl->get_members().end(); ) { |
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1025 | std::list< Declaration * >::iterator next = it+1; |
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1026 | if ( dynamic_cast< TypedefDecl * >( *it ) ) { |
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1027 | delete *it; |
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1028 | aggDecl->get_members().erase( it ); |
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1029 | } // if |
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1030 | it = next; |
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1031 | } |
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1032 | return aggDecl; |
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1033 | } |
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1034 | |
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1035 | template<typename AggDecl> |
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1036 | void EliminateTypedef::addImplicitTypedef( AggDecl * aggDecl ) { |
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1037 | if ( typedefNames.count( aggDecl->get_name() ) == 0 ) { |
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1038 | Type *type; |
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1039 | if ( StructDecl * newDeclStructDecl = dynamic_cast< StructDecl * >( aggDecl ) ) { |
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1040 | type = new StructInstType( Type::Qualifiers(), newDeclStructDecl->get_name() ); |
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1041 | } else if ( UnionDecl * newDeclUnionDecl = dynamic_cast< UnionDecl * >( aggDecl ) ) { |
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1042 | type = new UnionInstType( Type::Qualifiers(), newDeclUnionDecl->get_name() ); |
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1043 | } else if ( EnumDecl * newDeclEnumDecl = dynamic_cast< EnumDecl * >( aggDecl ) ) { |
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1044 | type = new EnumInstType( Type::Qualifiers(), newDeclEnumDecl->get_name() ); |
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1045 | } // if |
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1046 | TypedefDecl * tyDecl = new TypedefDecl( aggDecl->get_name(), DeclarationNode::NoStorageClass, type ); |
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1047 | typedefNames[ aggDecl->get_name() ] = std::make_pair( tyDecl, scopeLevel ); |
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1048 | } // if |
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1049 | } |
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1050 | Declaration *EliminateTypedef::mutate( StructDecl * structDecl ) { |
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1051 | addImplicitTypedef( structDecl ); |
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1052 | Mutator::mutate( structDecl ); |
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1053 | return handleAggregate( structDecl ); |
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1054 | } |
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1055 | |
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1056 | Declaration *EliminateTypedef::mutate( UnionDecl * unionDecl ) { |
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1057 | addImplicitTypedef( unionDecl ); |
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1058 | Mutator::mutate( unionDecl ); |
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1059 | return handleAggregate( unionDecl ); |
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1060 | } |
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1061 | |
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1062 | Declaration *EliminateTypedef::mutate( EnumDecl * enumDecl ) { |
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1063 | addImplicitTypedef( enumDecl ); |
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1064 | Mutator::mutate( enumDecl ); |
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1065 | return handleAggregate( enumDecl ); |
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1066 | } |
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1067 | |
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1068 | Declaration *EliminateTypedef::mutate( TraitDecl * contextDecl ) { |
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1069 | Mutator::mutate( contextDecl ); |
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1070 | return handleAggregate( contextDecl ); |
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1071 | } |
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1072 | |
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1073 | DeclarationWithType * CompoundLiteral::mutate( ObjectDecl *objectDecl ) { |
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1074 | storageclass = objectDecl->get_storageClass(); |
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1075 | DeclarationWithType * temp = Mutator::mutate( objectDecl ); |
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1076 | storageclass = DeclarationNode::NoStorageClass; |
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1077 | return temp; |
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1078 | } |
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1079 | |
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1080 | Expression *CompoundLiteral::mutate( CompoundLiteralExpr *compLitExpr ) { |
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1081 | // transform [storage_class] ... (struct S){ 3, ... }; |
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1082 | // into [storage_class] struct S temp = { 3, ... }; |
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1083 | static UniqueName indexName( "_compLit" ); |
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1084 | |
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1085 | ObjectDecl *tempvar = new ObjectDecl( indexName.newName(), storageclass, LinkageSpec::C, 0, compLitExpr->get_type(), compLitExpr->get_initializer() ); |
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1086 | compLitExpr->set_type( 0 ); |
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1087 | compLitExpr->set_initializer( 0 ); |
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1088 | delete compLitExpr; |
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1089 | DeclarationWithType * newtempvar = mutate( tempvar ); |
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1090 | addDeclaration( newtempvar ); // add modified temporary to current block |
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1091 | return new VariableExpr( newtempvar ); |
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1092 | } |
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1093 | } // namespace SymTab |
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1094 | |
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1095 | // Local Variables: // |
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1096 | // tab-width: 4 // |
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1097 | // mode: c++ // |
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1098 | // compile-command: "make install" // |
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1099 | // End: // |
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