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 : Rob Schluntz |
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12 | // Last Modified On : Wed Jul 22 13:16:00 2015 |
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13 | // Update Count : 194 |
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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 "Validate.h" |
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43 | #include "SynTree/Visitor.h" |
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44 | #include "SynTree/Mutator.h" |
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45 | #include "SynTree/Type.h" |
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46 | #include "SynTree/Statement.h" |
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47 | #include "SynTree/TypeSubstitution.h" |
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48 | #include "Indexer.h" |
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49 | #include "FixFunction.h" |
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50 | // #include "ImplementationType.h" |
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51 | #include "utility.h" |
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52 | #include "UniqueName.h" |
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53 | #include "AddVisit.h" |
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54 | #include "MakeLibCfa.h" |
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55 | #include "TypeEquality.h" |
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56 | |
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57 | #define debugPrint( x ) if ( doDebug ) { std::cout << x; } |
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58 | |
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59 | namespace SymTab { |
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60 | class HoistStruct : public Visitor { |
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61 | public: |
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62 | /// Flattens nested struct types |
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63 | static void hoistStruct( std::list< Declaration * > &translationUnit ); |
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64 | |
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65 | std::list< Declaration * > &get_declsToAdd() { return declsToAdd; } |
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66 | |
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67 | virtual void visit( StructDecl *aggregateDecl ); |
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68 | virtual void visit( UnionDecl *aggregateDecl ); |
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69 | |
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70 | virtual void visit( CompoundStmt *compoundStmt ); |
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71 | virtual void visit( IfStmt *ifStmt ); |
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72 | virtual void visit( WhileStmt *whileStmt ); |
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73 | virtual void visit( ForStmt *forStmt ); |
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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 | virtual void visit( CatchStmt *catchStmt ); |
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78 | private: |
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79 | HoistStruct(); |
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80 | |
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81 | template< typename AggDecl > void handleAggregate( AggDecl *aggregateDecl ); |
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82 | |
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83 | std::list< Declaration * > declsToAdd; |
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84 | bool inStruct; |
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85 | }; |
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86 | |
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87 | /// Replaces enum types by int, and function or array types in function parameter and return lists by appropriate pointers |
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88 | class Pass1 : public Visitor { |
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89 | typedef Visitor Parent; |
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90 | virtual void visit( EnumDecl *aggregateDecl ); |
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91 | virtual void visit( FunctionType *func ); |
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92 | }; |
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93 | |
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94 | /// Associates forward declarations of aggregates with their definitions |
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95 | class Pass2 : public Indexer { |
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96 | typedef Indexer Parent; |
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97 | public: |
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98 | Pass2( bool doDebug, const Indexer *indexer ); |
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99 | private: |
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100 | virtual void visit( StructInstType *structInst ); |
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101 | virtual void visit( UnionInstType *unionInst ); |
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102 | virtual void visit( ContextInstType *contextInst ); |
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103 | virtual void visit( StructDecl *structDecl ); |
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104 | virtual void visit( UnionDecl *unionDecl ); |
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105 | virtual void visit( TypeInstType *typeInst ); |
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106 | |
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107 | const Indexer *indexer; |
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108 | |
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109 | typedef std::map< std::string, std::list< StructInstType * > > ForwardStructsType; |
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110 | typedef std::map< std::string, std::list< UnionInstType * > > ForwardUnionsType; |
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111 | ForwardStructsType forwardStructs; |
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112 | ForwardUnionsType forwardUnions; |
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113 | }; |
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114 | |
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115 | /// Replaces array and function types in forall lists by appropriate pointer type |
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116 | class Pass3 : public Indexer { |
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117 | typedef Indexer Parent; |
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118 | public: |
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119 | Pass3( const Indexer *indexer ); |
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120 | private: |
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121 | virtual void visit( ObjectDecl *object ); |
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122 | virtual void visit( FunctionDecl *func ); |
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123 | |
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124 | const Indexer *indexer; |
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125 | }; |
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126 | |
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127 | class AddStructAssignment : public Visitor { |
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128 | public: |
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129 | /// Generates assignment operators for aggregate types as required |
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130 | static void addStructAssignment( std::list< Declaration * > &translationUnit ); |
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131 | |
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132 | std::list< Declaration * > &get_declsToAdd() { return declsToAdd; } |
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133 | |
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134 | virtual void visit( EnumDecl *enumDecl ); |
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135 | virtual void visit( StructDecl *structDecl ); |
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136 | virtual void visit( UnionDecl *structDecl ); |
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137 | virtual void visit( TypeDecl *typeDecl ); |
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138 | virtual void visit( ContextDecl *ctxDecl ); |
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139 | virtual void visit( FunctionDecl *functionDecl ); |
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140 | |
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141 | virtual void visit( FunctionType *ftype ); |
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142 | virtual void visit( PointerType *ftype ); |
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143 | |
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144 | virtual void visit( CompoundStmt *compoundStmt ); |
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145 | virtual void visit( IfStmt *ifStmt ); |
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146 | virtual void visit( WhileStmt *whileStmt ); |
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147 | virtual void visit( ForStmt *forStmt ); |
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148 | virtual void visit( SwitchStmt *switchStmt ); |
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149 | virtual void visit( ChooseStmt *chooseStmt ); |
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150 | virtual void visit( CaseStmt *caseStmt ); |
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151 | virtual void visit( CatchStmt *catchStmt ); |
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152 | |
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153 | AddStructAssignment() : functionNesting( 0 ) {} |
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154 | private: |
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155 | template< typename StmtClass > void visitStatement( StmtClass *stmt ); |
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156 | |
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157 | std::list< Declaration * > declsToAdd; |
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158 | std::set< std::string > structsDone; |
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159 | unsigned int functionNesting; // current level of nested functions |
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160 | }; |
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161 | |
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162 | class EliminateTypedef : public Mutator { |
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163 | public: |
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164 | EliminateTypedef() : scopeLevel( 0 ) {} |
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165 | static void eliminateTypedef( std::list< Declaration * > &translationUnit ); |
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166 | private: |
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167 | virtual Declaration *mutate( TypedefDecl *typeDecl ); |
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168 | virtual TypeDecl *mutate( TypeDecl *typeDecl ); |
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169 | virtual DeclarationWithType *mutate( FunctionDecl *funcDecl ); |
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170 | virtual DeclarationWithType *mutate( ObjectDecl *objDecl ); |
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171 | virtual CompoundStmt *mutate( CompoundStmt *compoundStmt ); |
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172 | virtual Type *mutate( TypeInstType *aggregateUseType ); |
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173 | virtual Expression *mutate( CastExpr *castExpr ); |
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174 | |
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175 | virtual Declaration *mutate( StructDecl * structDecl ); |
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176 | virtual Declaration *mutate( UnionDecl * unionDecl ); |
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177 | virtual Declaration *mutate( EnumDecl * enumDecl ); |
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178 | virtual Declaration *mutate( ContextDecl * contextDecl ); |
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179 | |
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180 | template<typename AggDecl> |
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181 | AggDecl *handleAggregate( AggDecl * aggDecl ); |
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182 | |
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183 | typedef std::map< std::string, std::pair< TypedefDecl *, int > > TypedefMap; |
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184 | TypedefMap typedefNames; |
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185 | int scopeLevel; |
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186 | }; |
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187 | |
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188 | void validate( std::list< Declaration * > &translationUnit, bool doDebug ) { |
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189 | Pass1 pass1; |
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190 | Pass2 pass2( doDebug, 0 ); |
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191 | Pass3 pass3( 0 ); |
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192 | EliminateTypedef::eliminateTypedef( translationUnit ); |
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193 | HoistStruct::hoistStruct( translationUnit ); |
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194 | acceptAll( translationUnit, pass1 ); |
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195 | acceptAll( translationUnit, pass2 ); |
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196 | // need to collect all of the assignment operators prior to |
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197 | // this point and only generate assignment operators if one doesn't exist |
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198 | AddStructAssignment::addStructAssignment( translationUnit ); |
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199 | acceptAll( translationUnit, pass3 ); |
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200 | } |
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201 | |
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202 | void validateType( Type *type, const Indexer *indexer ) { |
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203 | Pass1 pass1; |
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204 | Pass2 pass2( false, indexer ); |
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205 | Pass3 pass3( indexer ); |
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206 | type->accept( pass1 ); |
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207 | type->accept( pass2 ); |
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208 | type->accept( pass3 ); |
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209 | } |
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210 | |
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211 | template< typename Visitor > |
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212 | void acceptAndAdd( std::list< Declaration * > &translationUnit, Visitor &visitor, bool addBefore ) { |
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213 | std::list< Declaration * >::iterator i = translationUnit.begin(); |
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214 | while ( i != translationUnit.end() ) { |
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215 | (*i)->accept( visitor ); |
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216 | std::list< Declaration * >::iterator next = i; |
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217 | next++; |
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218 | if ( ! visitor.get_declsToAdd().empty() ) { |
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219 | translationUnit.splice( addBefore ? i : next, visitor.get_declsToAdd() ); |
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220 | } // if |
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221 | i = next; |
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222 | } // while |
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223 | } |
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224 | |
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225 | void HoistStruct::hoistStruct( std::list< Declaration * > &translationUnit ) { |
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226 | HoistStruct hoister; |
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227 | acceptAndAdd( translationUnit, hoister, true ); |
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228 | } |
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229 | |
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230 | HoistStruct::HoistStruct() : inStruct( false ) { |
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231 | } |
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232 | |
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233 | void filter( std::list< Declaration * > &declList, bool (*pred)( Declaration * ), bool doDelete ) { |
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234 | std::list< Declaration * >::iterator i = declList.begin(); |
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235 | while ( i != declList.end() ) { |
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236 | std::list< Declaration * >::iterator next = i; |
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237 | ++next; |
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238 | if ( pred( *i ) ) { |
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239 | if ( doDelete ) { |
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240 | delete *i; |
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241 | } // if |
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242 | declList.erase( i ); |
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243 | } // if |
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244 | i = next; |
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245 | } // while |
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246 | } |
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247 | |
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248 | bool isStructOrUnion( Declaration *decl ) { |
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249 | return dynamic_cast< StructDecl * >( decl ) || dynamic_cast< UnionDecl * >( decl ); |
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250 | } |
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251 | |
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252 | template< typename AggDecl > |
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253 | void HoistStruct::handleAggregate( AggDecl *aggregateDecl ) { |
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254 | if ( inStruct ) { |
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255 | // Add elements in stack order corresponding to nesting structure. |
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256 | declsToAdd.push_front( aggregateDecl ); |
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257 | Visitor::visit( aggregateDecl ); |
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258 | } else { |
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259 | inStruct = true; |
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260 | Visitor::visit( aggregateDecl ); |
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261 | inStruct = false; |
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262 | } // if |
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263 | // Always remove the hoisted aggregate from the inner structure. |
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264 | filter( aggregateDecl->get_members(), isStructOrUnion, false ); |
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265 | } |
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266 | |
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267 | void HoistStruct::visit( StructDecl *aggregateDecl ) { |
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268 | handleAggregate( aggregateDecl ); |
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269 | } |
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270 | |
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271 | void HoistStruct::visit( UnionDecl *aggregateDecl ) { |
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272 | handleAggregate( aggregateDecl ); |
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273 | } |
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274 | |
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275 | void HoistStruct::visit( CompoundStmt *compoundStmt ) { |
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276 | addVisit( compoundStmt, *this ); |
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277 | } |
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278 | |
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279 | void HoistStruct::visit( IfStmt *ifStmt ) { |
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280 | addVisit( ifStmt, *this ); |
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281 | } |
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282 | |
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283 | void HoistStruct::visit( WhileStmt *whileStmt ) { |
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284 | addVisit( whileStmt, *this ); |
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285 | } |
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286 | |
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287 | void HoistStruct::visit( ForStmt *forStmt ) { |
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288 | addVisit( forStmt, *this ); |
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289 | } |
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290 | |
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291 | void HoistStruct::visit( SwitchStmt *switchStmt ) { |
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292 | addVisit( switchStmt, *this ); |
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293 | } |
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294 | |
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295 | void HoistStruct::visit( ChooseStmt *switchStmt ) { |
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296 | addVisit( switchStmt, *this ); |
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297 | } |
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298 | |
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299 | void HoistStruct::visit( CaseStmt *caseStmt ) { |
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300 | addVisit( caseStmt, *this ); |
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301 | } |
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302 | |
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303 | void HoistStruct::visit( CatchStmt *cathStmt ) { |
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304 | addVisit( cathStmt, *this ); |
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305 | } |
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306 | |
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307 | void Pass1::visit( EnumDecl *enumDecl ) { |
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308 | // Set the type of each member of the enumeration to be EnumConstant |
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309 | |
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310 | for ( std::list< Declaration * >::iterator i = enumDecl->get_members().begin(); i != enumDecl->get_members().end(); ++i ) { |
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311 | ObjectDecl * obj = dynamic_cast< ObjectDecl * >( *i ); |
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312 | assert( obj ); |
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313 | // obj->set_type( new EnumInstType( Type::Qualifiers( true, false, false, false, false, false ), enumDecl->get_name() ) ); |
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314 | BasicType * enumType = new BasicType( Type::Qualifiers(), BasicType::SignedInt ); |
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315 | obj->set_type( enumType ) ; |
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316 | } // for |
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317 | Parent::visit( enumDecl ); |
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318 | } |
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319 | |
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320 | namespace { |
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321 | template< typename DWTIterator > |
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322 | void fixFunctionList( DWTIterator begin, DWTIterator end, FunctionType *func ) { |
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323 | // 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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324 | // entirely other fix ups are handled by the FixFunction class |
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325 | if ( begin == end ) return; |
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326 | FixFunction fixer; |
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327 | DWTIterator i = begin; |
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328 | *i = (*i )->acceptMutator( fixer ); |
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329 | if ( fixer.get_isVoid() ) { |
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330 | DWTIterator j = i; |
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331 | ++i; |
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332 | func->get_parameters().erase( j ); |
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333 | if ( i != end ) { |
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334 | throw SemanticError( "invalid type void in function type ", func ); |
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335 | } // if |
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336 | } else { |
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337 | ++i; |
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338 | for ( ; i != end; ++i ) { |
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339 | FixFunction fixer; |
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340 | *i = (*i )->acceptMutator( fixer ); |
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341 | if ( fixer.get_isVoid() ) { |
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342 | throw SemanticError( "invalid type void in function type ", func ); |
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343 | } // if |
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344 | } // for |
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345 | } // if |
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346 | } |
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347 | } |
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348 | |
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349 | void Pass1::visit( FunctionType *func ) { |
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350 | // Fix up parameters and return types |
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351 | fixFunctionList( func->get_parameters().begin(), func->get_parameters().end(), func ); |
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352 | fixFunctionList( func->get_returnVals().begin(), func->get_returnVals().end(), func ); |
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353 | Visitor::visit( func ); |
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354 | } |
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355 | |
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356 | Pass2::Pass2( bool doDebug, const Indexer *other_indexer ) : Indexer( doDebug ) { |
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357 | if ( other_indexer ) { |
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358 | indexer = other_indexer; |
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359 | } else { |
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360 | indexer = this; |
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361 | } // if |
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362 | } |
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363 | |
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364 | void Pass2::visit( StructInstType *structInst ) { |
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365 | Parent::visit( structInst ); |
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366 | StructDecl *st = indexer->lookupStruct( structInst->get_name() ); |
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367 | // it's not a semantic error if the struct is not found, just an implicit forward declaration |
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368 | if ( st ) { |
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369 | assert( ! structInst->get_baseStruct() || structInst->get_baseStruct()->get_members().empty() || ! st->get_members().empty() ); |
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370 | structInst->set_baseStruct( st ); |
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371 | } // if |
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372 | if ( ! st || st->get_members().empty() ) { |
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373 | // use of forward declaration |
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374 | forwardStructs[ structInst->get_name() ].push_back( structInst ); |
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375 | } // if |
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376 | } |
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377 | |
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378 | void Pass2::visit( UnionInstType *unionInst ) { |
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379 | Parent::visit( unionInst ); |
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380 | UnionDecl *un = indexer->lookupUnion( unionInst->get_name() ); |
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381 | // it's not a semantic error if the union is not found, just an implicit forward declaration |
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382 | if ( un ) { |
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383 | unionInst->set_baseUnion( un ); |
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384 | } // if |
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385 | if ( ! un || un->get_members().empty() ) { |
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386 | // use of forward declaration |
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387 | forwardUnions[ unionInst->get_name() ].push_back( unionInst ); |
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388 | } // if |
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389 | } |
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390 | |
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391 | void Pass2::visit( ContextInstType *contextInst ) { |
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392 | Parent::visit( contextInst ); |
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393 | ContextDecl *ctx = indexer->lookupContext( contextInst->get_name() ); |
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394 | if ( ! ctx ) { |
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395 | throw SemanticError( "use of undeclared context " + contextInst->get_name() ); |
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396 | } // if |
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397 | for ( std::list< TypeDecl * >::const_iterator i = ctx->get_parameters().begin(); i != ctx->get_parameters().end(); ++i ) { |
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398 | for ( std::list< DeclarationWithType * >::const_iterator assert = (*i )->get_assertions().begin(); assert != (*i )->get_assertions().end(); ++assert ) { |
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399 | if ( ContextInstType *otherCtx = dynamic_cast< ContextInstType * >(*assert ) ) { |
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400 | cloneAll( otherCtx->get_members(), contextInst->get_members() ); |
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401 | } else { |
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402 | contextInst->get_members().push_back( (*assert )->clone() ); |
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403 | } // if |
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404 | } // for |
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405 | } // for |
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406 | |
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407 | if ( ctx->get_parameters().size() != contextInst->get_parameters().size() ) { |
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408 | throw SemanticError( "incorrect number of context parameters: ", contextInst ); |
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409 | } // if |
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410 | |
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411 | 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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412 | } |
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413 | |
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414 | void Pass2::visit( StructDecl *structDecl ) { |
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415 | if ( ! structDecl->get_members().empty() ) { |
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416 | ForwardStructsType::iterator fwds = forwardStructs.find( structDecl->get_name() ); |
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417 | if ( fwds != forwardStructs.end() ) { |
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418 | for ( std::list< StructInstType * >::iterator inst = fwds->second.begin(); inst != fwds->second.end(); ++inst ) { |
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419 | (*inst )->set_baseStruct( structDecl ); |
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420 | } // for |
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421 | forwardStructs.erase( fwds ); |
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422 | } // if |
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423 | } // if |
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424 | Indexer::visit( structDecl ); |
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425 | } |
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426 | |
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427 | void Pass2::visit( UnionDecl *unionDecl ) { |
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428 | if ( ! unionDecl->get_members().empty() ) { |
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429 | ForwardUnionsType::iterator fwds = forwardUnions.find( unionDecl->get_name() ); |
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430 | if ( fwds != forwardUnions.end() ) { |
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431 | for ( std::list< UnionInstType * >::iterator inst = fwds->second.begin(); inst != fwds->second.end(); ++inst ) { |
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432 | (*inst )->set_baseUnion( unionDecl ); |
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433 | } // for |
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434 | forwardUnions.erase( fwds ); |
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435 | } // if |
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436 | } // if |
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437 | Indexer::visit( unionDecl ); |
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438 | } |
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439 | |
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440 | void Pass2::visit( TypeInstType *typeInst ) { |
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441 | if ( NamedTypeDecl *namedTypeDecl = lookupType( typeInst->get_name() ) ) { |
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442 | if ( TypeDecl *typeDecl = dynamic_cast< TypeDecl * >( namedTypeDecl ) ) { |
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443 | typeInst->set_isFtype( typeDecl->get_kind() == TypeDecl::Ftype ); |
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444 | } // if |
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445 | } // if |
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446 | } |
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447 | |
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448 | Pass3::Pass3( const Indexer *other_indexer ) : Indexer( false ) { |
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449 | if ( other_indexer ) { |
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450 | indexer = other_indexer; |
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451 | } else { |
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452 | indexer = this; |
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453 | } // if |
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454 | } |
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455 | |
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456 | /// Fix up assertions |
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457 | void forallFixer( Type *func ) { |
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458 | for ( std::list< TypeDecl * >::iterator type = func->get_forall().begin(); type != func->get_forall().end(); ++type ) { |
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459 | std::list< DeclarationWithType * > toBeDone, nextRound; |
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460 | toBeDone.splice( toBeDone.end(), (*type )->get_assertions() ); |
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461 | while ( ! toBeDone.empty() ) { |
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462 | for ( std::list< DeclarationWithType * >::iterator assertion = toBeDone.begin(); assertion != toBeDone.end(); ++assertion ) { |
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463 | if ( ContextInstType *ctx = dynamic_cast< ContextInstType * >( (*assertion )->get_type() ) ) { |
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464 | for ( std::list< Declaration * >::const_iterator i = ctx->get_members().begin(); i != ctx->get_members().end(); ++i ) { |
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465 | DeclarationWithType *dwt = dynamic_cast< DeclarationWithType * >( *i ); |
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466 | assert( dwt ); |
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467 | nextRound.push_back( dwt->clone() ); |
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468 | } |
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469 | delete ctx; |
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470 | } else { |
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471 | FixFunction fixer; |
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472 | *assertion = (*assertion )->acceptMutator( fixer ); |
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473 | if ( fixer.get_isVoid() ) { |
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474 | throw SemanticError( "invalid type void in assertion of function ", func ); |
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475 | } |
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476 | (*type )->get_assertions().push_back( *assertion ); |
---|
477 | } // if |
---|
478 | } // for |
---|
479 | toBeDone.clear(); |
---|
480 | toBeDone.splice( toBeDone.end(), nextRound ); |
---|
481 | } // while |
---|
482 | } // for |
---|
483 | } |
---|
484 | |
---|
485 | void Pass3::visit( ObjectDecl *object ) { |
---|
486 | forallFixer( object->get_type() ); |
---|
487 | if ( PointerType *pointer = dynamic_cast< PointerType * >( object->get_type() ) ) { |
---|
488 | forallFixer( pointer->get_base() ); |
---|
489 | } // if |
---|
490 | Parent::visit( object ); |
---|
491 | object->fixUniqueId(); |
---|
492 | } |
---|
493 | |
---|
494 | void Pass3::visit( FunctionDecl *func ) { |
---|
495 | forallFixer( func->get_type() ); |
---|
496 | Parent::visit( func ); |
---|
497 | func->fixUniqueId(); |
---|
498 | } |
---|
499 | |
---|
500 | static const std::list< std::string > noLabels; |
---|
501 | |
---|
502 | void AddStructAssignment::addStructAssignment( std::list< Declaration * > &translationUnit ) { |
---|
503 | AddStructAssignment visitor; |
---|
504 | acceptAndAdd( translationUnit, visitor, false ); |
---|
505 | } |
---|
506 | |
---|
507 | template< typename OutputIterator > |
---|
508 | void makeScalarAssignment( ObjectDecl *srcParam, ObjectDecl *dstParam, DeclarationWithType *member, OutputIterator out ) { |
---|
509 | ObjectDecl *obj = dynamic_cast<ObjectDecl *>( member ); |
---|
510 | // unnamed bit fields are not copied as they cannot be accessed |
---|
511 | if ( obj != NULL && obj->get_name() == "" && obj->get_bitfieldWidth() != NULL ) return; |
---|
512 | |
---|
513 | UntypedExpr *assignExpr = new UntypedExpr( new NameExpr( "?=?" ) ); |
---|
514 | |
---|
515 | UntypedExpr *derefExpr = new UntypedExpr( new NameExpr( "*?" ) ); |
---|
516 | derefExpr->get_args().push_back( new VariableExpr( dstParam ) ); |
---|
517 | |
---|
518 | // do something special for unnamed members |
---|
519 | Expression *dstselect = new AddressExpr( new MemberExpr( member, derefExpr ) ); |
---|
520 | assignExpr->get_args().push_back( dstselect ); |
---|
521 | |
---|
522 | Expression *srcselect = new MemberExpr( member, new VariableExpr( srcParam ) ); |
---|
523 | assignExpr->get_args().push_back( srcselect ); |
---|
524 | |
---|
525 | *out++ = new ExprStmt( noLabels, assignExpr ); |
---|
526 | } |
---|
527 | |
---|
528 | template< typename OutputIterator > |
---|
529 | void makeArrayAssignment( ObjectDecl *srcParam, ObjectDecl *dstParam, DeclarationWithType *member, ArrayType *array, OutputIterator out ) { |
---|
530 | static UniqueName indexName( "_index" ); |
---|
531 | |
---|
532 | // for a flexible array member nothing is done -- user must define own assignment |
---|
533 | if ( ! array->get_dimension() ) return; |
---|
534 | |
---|
535 | ObjectDecl *index = new ObjectDecl( indexName.newName(), DeclarationNode::NoStorageClass, LinkageSpec::C, 0, new BasicType( Type::Qualifiers(), BasicType::SignedInt ), 0 ); |
---|
536 | *out++ = new DeclStmt( noLabels, index ); |
---|
537 | |
---|
538 | UntypedExpr *init = new UntypedExpr( new NameExpr( "?=?" ) ); |
---|
539 | init->get_args().push_back( new AddressExpr( new VariableExpr( index ) ) ); |
---|
540 | init->get_args().push_back( new NameExpr( "0" ) ); |
---|
541 | Statement *initStmt = new ExprStmt( noLabels, init ); |
---|
542 | std::list<Statement *> initList; |
---|
543 | initList.push_back( initStmt ); |
---|
544 | |
---|
545 | UntypedExpr *cond = new UntypedExpr( new NameExpr( "?<?" ) ); |
---|
546 | cond->get_args().push_back( new VariableExpr( index ) ); |
---|
547 | cond->get_args().push_back( array->get_dimension()->clone() ); |
---|
548 | |
---|
549 | UntypedExpr *inc = new UntypedExpr( new NameExpr( "++?" ) ); |
---|
550 | inc->get_args().push_back( new AddressExpr( new VariableExpr( index ) ) ); |
---|
551 | |
---|
552 | UntypedExpr *assignExpr = new UntypedExpr( new NameExpr( "?=?" ) ); |
---|
553 | |
---|
554 | UntypedExpr *derefExpr = new UntypedExpr( new NameExpr( "*?" ) ); |
---|
555 | derefExpr->get_args().push_back( new VariableExpr( dstParam ) ); |
---|
556 | |
---|
557 | Expression *dstselect = new MemberExpr( member, derefExpr ); |
---|
558 | UntypedExpr *dstIndex = new UntypedExpr( new NameExpr( "?+?" ) ); |
---|
559 | dstIndex->get_args().push_back( dstselect ); |
---|
560 | dstIndex->get_args().push_back( new VariableExpr( index ) ); |
---|
561 | assignExpr->get_args().push_back( dstIndex ); |
---|
562 | |
---|
563 | Expression *srcselect = new MemberExpr( member, new VariableExpr( srcParam ) ); |
---|
564 | UntypedExpr *srcIndex = new UntypedExpr( new NameExpr( "?[?]" ) ); |
---|
565 | srcIndex->get_args().push_back( srcselect ); |
---|
566 | srcIndex->get_args().push_back( new VariableExpr( index ) ); |
---|
567 | assignExpr->get_args().push_back( srcIndex ); |
---|
568 | |
---|
569 | *out++ = new ForStmt( noLabels, initList, cond, inc, new ExprStmt( noLabels, assignExpr ) ); |
---|
570 | } |
---|
571 | |
---|
572 | //E ?=?(E volatile*, int), |
---|
573 | // ?=?(E _Atomic volatile*, int); |
---|
574 | void makeEnumAssignment( EnumDecl *enumDecl, EnumInstType *refType, unsigned int functionNesting, std::list< Declaration * > &declsToAdd ) { |
---|
575 | FunctionType *assignType = new FunctionType( Type::Qualifiers(), false ); |
---|
576 | |
---|
577 | ObjectDecl *returnVal = new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, refType->clone(), 0 ); |
---|
578 | assignType->get_returnVals().push_back( returnVal ); |
---|
579 | |
---|
580 | // need two assignment operators with different types |
---|
581 | FunctionType * assignType2 = assignType->clone(); |
---|
582 | |
---|
583 | // E ?=?(E volatile *, E) |
---|
584 | Type *etype = refType->clone(); |
---|
585 | // etype->get_qualifiers() += Type::Qualifiers(false, true, false, false, false, false); |
---|
586 | |
---|
587 | ObjectDecl *dstParam = new ObjectDecl( "_dst", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), etype ), 0 ); |
---|
588 | assignType->get_parameters().push_back( dstParam ); |
---|
589 | |
---|
590 | ObjectDecl *srcParam = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, etype->clone(), 0 ); |
---|
591 | assignType->get_parameters().push_back( srcParam ); |
---|
592 | |
---|
593 | // E ?=?(E volatile *, int) |
---|
594 | assignType2->get_parameters().push_back( dstParam->clone() ); |
---|
595 | BasicType * paramType = new BasicType(Type::Qualifiers(), BasicType::SignedInt); |
---|
596 | ObjectDecl *srcParam2 = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, paramType, 0 ); |
---|
597 | assignType2->get_parameters().push_back( srcParam2 ); |
---|
598 | |
---|
599 | // Routines at global scope marked "static" to prevent multiple definitions is separate translation units |
---|
600 | // because each unit generates copies of the default routines for each aggregate. |
---|
601 | |
---|
602 | // since there is no definition, these should not be inline |
---|
603 | // make these intrinsic so that the code generator does not make use of them |
---|
604 | FunctionDecl *assignDecl = new FunctionDecl( "?=?", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::Intrinsic, assignType, 0, false, false ); |
---|
605 | assignDecl->fixUniqueId(); |
---|
606 | FunctionDecl *assignDecl2 = new FunctionDecl( "?=?", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::Intrinsic, assignType2, 0, false, false ); |
---|
607 | assignDecl2->fixUniqueId(); |
---|
608 | |
---|
609 | // these should be built in the same way that the prelude |
---|
610 | // functions are, so build a list containing the prototypes |
---|
611 | // and allow MakeLibCfa to autogenerate the bodies. |
---|
612 | std::list< Declaration * > assigns; |
---|
613 | assigns.push_back( assignDecl ); |
---|
614 | assigns.push_back( assignDecl2 ); |
---|
615 | |
---|
616 | LibCfa::makeLibCfa( assigns ); |
---|
617 | |
---|
618 | // need to remove the prototypes, since this may be nested in a routine |
---|
619 | for ( int start = 0, end = assigns.size() / 2; start < end; start++ ) { |
---|
620 | delete assigns.front(); |
---|
621 | assigns.pop_front(); |
---|
622 | } // for |
---|
623 | |
---|
624 | declsToAdd.insert( declsToAdd.begin(), assigns.begin(), assigns.end() ); |
---|
625 | } |
---|
626 | |
---|
627 | |
---|
628 | Declaration *makeStructAssignment( StructDecl *aggregateDecl, StructInstType *refType, unsigned int functionNesting ) { |
---|
629 | FunctionType *assignType = new FunctionType( Type::Qualifiers(), false ); |
---|
630 | |
---|
631 | ObjectDecl *returnVal = new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, refType->clone(), 0 ); |
---|
632 | assignType->get_returnVals().push_back( returnVal ); |
---|
633 | |
---|
634 | ObjectDecl *dstParam = new ObjectDecl( "_dst", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), refType->clone() ), 0 ); |
---|
635 | assignType->get_parameters().push_back( dstParam ); |
---|
636 | |
---|
637 | ObjectDecl *srcParam = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, refType, 0 ); |
---|
638 | assignType->get_parameters().push_back( srcParam ); |
---|
639 | |
---|
640 | // Routines at global scope marked "static" to prevent multiple definitions is separate translation units |
---|
641 | // because each unit generates copies of the default routines for each aggregate. |
---|
642 | FunctionDecl *assignDecl = new FunctionDecl( "?=?", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, assignType, new CompoundStmt( noLabels ), true, false ); |
---|
643 | assignDecl->fixUniqueId(); |
---|
644 | |
---|
645 | for ( std::list< Declaration * >::const_iterator member = aggregateDecl->get_members().begin(); member != aggregateDecl->get_members().end(); ++member ) { |
---|
646 | if ( DeclarationWithType *dwt = dynamic_cast< DeclarationWithType * >( *member ) ) { |
---|
647 | // query the type qualifiers of this field and skip assigning it if it is marked const. |
---|
648 | // If it is an array type, we need to strip off the array layers to find its qualifiers. |
---|
649 | Type * type = dwt->get_type(); |
---|
650 | while ( ArrayType * at = dynamic_cast< ArrayType * >( type ) ) { |
---|
651 | type = at->get_base(); |
---|
652 | } |
---|
653 | |
---|
654 | if ( type->get_qualifiers().isConst ) { |
---|
655 | // don't assign const members |
---|
656 | continue; |
---|
657 | } |
---|
658 | |
---|
659 | if ( ArrayType *array = dynamic_cast< ArrayType * >( dwt->get_type() ) ) { |
---|
660 | makeArrayAssignment( srcParam, dstParam, dwt, array, back_inserter( assignDecl->get_statements()->get_kids() ) ); |
---|
661 | } else { |
---|
662 | makeScalarAssignment( srcParam, dstParam, dwt, back_inserter( assignDecl->get_statements()->get_kids() ) ); |
---|
663 | } // if |
---|
664 | } // if |
---|
665 | } // for |
---|
666 | assignDecl->get_statements()->get_kids().push_back( new ReturnStmt( noLabels, new VariableExpr( srcParam ) ) ); |
---|
667 | |
---|
668 | return assignDecl; |
---|
669 | } |
---|
670 | |
---|
671 | Declaration *makeUnionAssignment( UnionDecl *aggregateDecl, UnionInstType *refType, unsigned int functionNesting ) { |
---|
672 | FunctionType *assignType = new FunctionType( Type::Qualifiers(), false ); |
---|
673 | |
---|
674 | ObjectDecl *returnVal = new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, refType->clone(), 0 ); |
---|
675 | assignType->get_returnVals().push_back( returnVal ); |
---|
676 | |
---|
677 | ObjectDecl *dstParam = new ObjectDecl( "_dst", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), refType->clone() ), 0 ); |
---|
678 | assignType->get_parameters().push_back( dstParam ); |
---|
679 | |
---|
680 | ObjectDecl *srcParam = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, refType, 0 ); |
---|
681 | assignType->get_parameters().push_back( srcParam ); |
---|
682 | |
---|
683 | // Routines at global scope marked "static" to prevent multiple definitions is separate translation units |
---|
684 | // because each unit generates copies of the default routines for each aggregate. |
---|
685 | FunctionDecl *assignDecl = new FunctionDecl( "?=?", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, assignType, new CompoundStmt( noLabels ), true, false ); |
---|
686 | assignDecl->fixUniqueId(); |
---|
687 | |
---|
688 | UntypedExpr *copy = new UntypedExpr( new NameExpr( "__builtin_memcpy" ) ); |
---|
689 | copy->get_args().push_back( new VariableExpr( dstParam ) ); |
---|
690 | copy->get_args().push_back( new AddressExpr( new VariableExpr( srcParam ) ) ); |
---|
691 | copy->get_args().push_back( new SizeofExpr( refType->clone() ) ); |
---|
692 | |
---|
693 | assignDecl->get_statements()->get_kids().push_back( new ExprStmt( noLabels, copy ) ); |
---|
694 | assignDecl->get_statements()->get_kids().push_back( new ReturnStmt( noLabels, new VariableExpr( srcParam ) ) ); |
---|
695 | |
---|
696 | return assignDecl; |
---|
697 | } |
---|
698 | |
---|
699 | void AddStructAssignment::visit( EnumDecl *enumDecl ) { |
---|
700 | if ( ! enumDecl->get_members().empty() ) { |
---|
701 | EnumInstType *enumInst = new EnumInstType( Type::Qualifiers(), enumDecl->get_name() ); |
---|
702 | // enumInst->set_baseEnum( enumDecl ); |
---|
703 | // declsToAdd.push_back( |
---|
704 | makeEnumAssignment( enumDecl, enumInst, functionNesting, declsToAdd ); |
---|
705 | } |
---|
706 | } |
---|
707 | |
---|
708 | void AddStructAssignment::visit( StructDecl *structDecl ) { |
---|
709 | if ( ! structDecl->get_members().empty() && structsDone.find( structDecl->get_name() ) == structsDone.end() ) { |
---|
710 | StructInstType *structInst = new StructInstType( Type::Qualifiers(), structDecl->get_name() ); |
---|
711 | structInst->set_baseStruct( structDecl ); |
---|
712 | declsToAdd.push_back( makeStructAssignment( structDecl, structInst, functionNesting ) ); |
---|
713 | structsDone.insert( structDecl->get_name() ); |
---|
714 | } // if |
---|
715 | } |
---|
716 | |
---|
717 | void AddStructAssignment::visit( UnionDecl *unionDecl ) { |
---|
718 | if ( ! unionDecl->get_members().empty() ) { |
---|
719 | UnionInstType *unionInst = new UnionInstType( Type::Qualifiers(), unionDecl->get_name() ); |
---|
720 | unionInst->set_baseUnion( unionDecl ); |
---|
721 | declsToAdd.push_back( makeUnionAssignment( unionDecl, unionInst, functionNesting ) ); |
---|
722 | } // if |
---|
723 | } |
---|
724 | |
---|
725 | void AddStructAssignment::visit( TypeDecl *typeDecl ) { |
---|
726 | CompoundStmt *stmts = 0; |
---|
727 | TypeInstType *typeInst = new TypeInstType( Type::Qualifiers(), typeDecl->get_name(), false ); |
---|
728 | typeInst->set_baseType( typeDecl ); |
---|
729 | ObjectDecl *src = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, typeInst->clone(), 0 ); |
---|
730 | ObjectDecl *dst = new ObjectDecl( "_dst", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), typeInst->clone() ), 0 ); |
---|
731 | if ( typeDecl->get_base() ) { |
---|
732 | stmts = new CompoundStmt( std::list< Label >() ); |
---|
733 | UntypedExpr *assign = new UntypedExpr( new NameExpr( "?=?" ) ); |
---|
734 | assign->get_args().push_back( new CastExpr( new VariableExpr( dst ), new PointerType( Type::Qualifiers(), typeDecl->get_base()->clone() ) ) ); |
---|
735 | assign->get_args().push_back( new CastExpr( new VariableExpr( src ), typeDecl->get_base()->clone() ) ); |
---|
736 | stmts->get_kids().push_back( new ReturnStmt( std::list< Label >(), assign ) ); |
---|
737 | } // if |
---|
738 | FunctionType *type = new FunctionType( Type::Qualifiers(), false ); |
---|
739 | type->get_returnVals().push_back( new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, typeInst, 0 ) ); |
---|
740 | type->get_parameters().push_back( dst ); |
---|
741 | type->get_parameters().push_back( src ); |
---|
742 | FunctionDecl *func = new FunctionDecl( "?=?", DeclarationNode::NoStorageClass, LinkageSpec::AutoGen, type, stmts, false, false ); |
---|
743 | declsToAdd.push_back( func ); |
---|
744 | } |
---|
745 | |
---|
746 | void addDecls( std::list< Declaration * > &declsToAdd, std::list< Statement * > &statements, std::list< Statement * >::iterator i ) { |
---|
747 | for ( std::list< Declaration * >::iterator decl = declsToAdd.begin(); decl != declsToAdd.end(); ++decl ) { |
---|
748 | statements.insert( i, new DeclStmt( noLabels, *decl ) ); |
---|
749 | } // for |
---|
750 | declsToAdd.clear(); |
---|
751 | } |
---|
752 | |
---|
753 | void AddStructAssignment::visit( FunctionType *) { |
---|
754 | // ensure that we don't add assignment ops for types defined as part of the function |
---|
755 | } |
---|
756 | |
---|
757 | void AddStructAssignment::visit( PointerType *) { |
---|
758 | // ensure that we don't add assignment ops for types defined as part of the pointer |
---|
759 | } |
---|
760 | |
---|
761 | void AddStructAssignment::visit( ContextDecl *) { |
---|
762 | // ensure that we don't add assignment ops for types defined as part of the context |
---|
763 | } |
---|
764 | |
---|
765 | template< typename StmtClass > |
---|
766 | inline void AddStructAssignment::visitStatement( StmtClass *stmt ) { |
---|
767 | std::set< std::string > oldStructs = structsDone; |
---|
768 | addVisit( stmt, *this ); |
---|
769 | structsDone = oldStructs; |
---|
770 | } |
---|
771 | |
---|
772 | void AddStructAssignment::visit( FunctionDecl *functionDecl ) { |
---|
773 | maybeAccept( functionDecl->get_functionType(), *this ); |
---|
774 | acceptAll( functionDecl->get_oldDecls(), *this ); |
---|
775 | functionNesting += 1; |
---|
776 | maybeAccept( functionDecl->get_statements(), *this ); |
---|
777 | functionNesting -= 1; |
---|
778 | } |
---|
779 | |
---|
780 | void AddStructAssignment::visit( CompoundStmt *compoundStmt ) { |
---|
781 | visitStatement( compoundStmt ); |
---|
782 | } |
---|
783 | |
---|
784 | void AddStructAssignment::visit( IfStmt *ifStmt ) { |
---|
785 | visitStatement( ifStmt ); |
---|
786 | } |
---|
787 | |
---|
788 | void AddStructAssignment::visit( WhileStmt *whileStmt ) { |
---|
789 | visitStatement( whileStmt ); |
---|
790 | } |
---|
791 | |
---|
792 | void AddStructAssignment::visit( ForStmt *forStmt ) { |
---|
793 | visitStatement( forStmt ); |
---|
794 | } |
---|
795 | |
---|
796 | void AddStructAssignment::visit( SwitchStmt *switchStmt ) { |
---|
797 | visitStatement( switchStmt ); |
---|
798 | } |
---|
799 | |
---|
800 | void AddStructAssignment::visit( ChooseStmt *switchStmt ) { |
---|
801 | visitStatement( switchStmt ); |
---|
802 | } |
---|
803 | |
---|
804 | void AddStructAssignment::visit( CaseStmt *caseStmt ) { |
---|
805 | visitStatement( caseStmt ); |
---|
806 | } |
---|
807 | |
---|
808 | void AddStructAssignment::visit( CatchStmt *cathStmt ) { |
---|
809 | visitStatement( cathStmt ); |
---|
810 | } |
---|
811 | |
---|
812 | bool isTypedef( Declaration *decl ) { |
---|
813 | return dynamic_cast< TypedefDecl * >( decl ); |
---|
814 | } |
---|
815 | |
---|
816 | void EliminateTypedef::eliminateTypedef( std::list< Declaration * > &translationUnit ) { |
---|
817 | EliminateTypedef eliminator; |
---|
818 | mutateAll( translationUnit, eliminator ); |
---|
819 | filter( translationUnit, isTypedef, true ); |
---|
820 | } |
---|
821 | |
---|
822 | Type *EliminateTypedef::mutate( TypeInstType * typeInst ) { |
---|
823 | // instances of typedef types will come here. If it is an instance |
---|
824 | // of a typdef type, link the instance to its actual type. |
---|
825 | TypedefMap::const_iterator def = typedefNames.find( typeInst->get_name() ); |
---|
826 | if ( def != typedefNames.end() ) { |
---|
827 | Type *ret = def->second.first->get_base()->clone(); |
---|
828 | ret->get_qualifiers() += typeInst->get_qualifiers(); |
---|
829 | // place instance parameters on the typedef'd type |
---|
830 | if ( ! typeInst->get_parameters().empty() ) { |
---|
831 | ReferenceToType *rtt = dynamic_cast<ReferenceToType*>(ret); |
---|
832 | if ( ! rtt ) { |
---|
833 | throw SemanticError("cannot apply type parameters to base type of " + typeInst->get_name()); |
---|
834 | } |
---|
835 | rtt->get_parameters().clear(); |
---|
836 | cloneAll(typeInst->get_parameters(), rtt->get_parameters()); |
---|
837 | } // if |
---|
838 | delete typeInst; |
---|
839 | return ret; |
---|
840 | } // if |
---|
841 | return typeInst; |
---|
842 | } |
---|
843 | |
---|
844 | Declaration *EliminateTypedef::mutate( TypedefDecl * tyDecl ) { |
---|
845 | Declaration *ret = Mutator::mutate( tyDecl ); |
---|
846 | if ( typedefNames.count( tyDecl->get_name() ) == 1 && typedefNames[ tyDecl->get_name() ].second == scopeLevel ) { |
---|
847 | // typedef to the same name from the same scope |
---|
848 | // must be from the same type |
---|
849 | |
---|
850 | Type * t1 = tyDecl->get_base(); |
---|
851 | Type * t2 = typedefNames[ tyDecl->get_name() ].first->get_base(); |
---|
852 | if ( ! typeEquals( t1, t2, true ) ) { |
---|
853 | throw SemanticError( "cannot redefine typedef: " + tyDecl->get_name() ); |
---|
854 | } |
---|
855 | } else { |
---|
856 | typedefNames[ tyDecl->get_name() ] = std::make_pair( tyDecl, scopeLevel ); |
---|
857 | } // if |
---|
858 | |
---|
859 | // When a typedef is a forward declaration: |
---|
860 | // typedef struct screen SCREEN; |
---|
861 | // the declaration portion must be retained: |
---|
862 | // struct screen; |
---|
863 | // because the expansion of the typedef is: |
---|
864 | // void rtn( SCREEN *p ) => void rtn( struct screen *p ) |
---|
865 | // hence the type-name "screen" must be defined. |
---|
866 | // Note, qualifiers on the typedef are superfluous for the forward declaration. |
---|
867 | if ( StructInstType *aggDecl = dynamic_cast< StructInstType * >( tyDecl->get_base() ) ) { |
---|
868 | return new StructDecl( aggDecl->get_name() ); |
---|
869 | } else if ( UnionInstType *aggDecl = dynamic_cast< UnionInstType * >( tyDecl->get_base() ) ) { |
---|
870 | return new UnionDecl( aggDecl->get_name() ); |
---|
871 | } else { |
---|
872 | return ret; |
---|
873 | } // if |
---|
874 | } |
---|
875 | |
---|
876 | TypeDecl *EliminateTypedef::mutate( TypeDecl * typeDecl ) { |
---|
877 | TypedefMap::iterator i = typedefNames.find( typeDecl->get_name() ); |
---|
878 | if ( i != typedefNames.end() ) { |
---|
879 | typedefNames.erase( i ) ; |
---|
880 | } // if |
---|
881 | return typeDecl; |
---|
882 | } |
---|
883 | |
---|
884 | DeclarationWithType *EliminateTypedef::mutate( FunctionDecl * funcDecl ) { |
---|
885 | TypedefMap oldNames = typedefNames; |
---|
886 | DeclarationWithType *ret = Mutator::mutate( funcDecl ); |
---|
887 | typedefNames = oldNames; |
---|
888 | return ret; |
---|
889 | } |
---|
890 | |
---|
891 | DeclarationWithType *EliminateTypedef::mutate( ObjectDecl * objDecl ) { |
---|
892 | TypedefMap oldNames = typedefNames; |
---|
893 | DeclarationWithType *ret = Mutator::mutate( objDecl ); |
---|
894 | if ( FunctionType *funtype = dynamic_cast<FunctionType *>( ret->get_type() ) ) { |
---|
895 | return new FunctionDecl( ret->get_name(), ret->get_storageClass(), ret->get_linkage(), funtype, 0, ret->get_isInline(), ret->get_isNoreturn() ); |
---|
896 | } else if ( objDecl->get_isInline() || objDecl->get_isNoreturn() ) { |
---|
897 | throw SemanticError( "invalid inline or _Noreturn specification in declaration of ", objDecl ); |
---|
898 | } // if |
---|
899 | typedefNames = oldNames; |
---|
900 | return ret; |
---|
901 | } |
---|
902 | |
---|
903 | Expression *EliminateTypedef::mutate( CastExpr * castExpr ) { |
---|
904 | TypedefMap oldNames = typedefNames; |
---|
905 | Expression *ret = Mutator::mutate( castExpr ); |
---|
906 | typedefNames = oldNames; |
---|
907 | return ret; |
---|
908 | } |
---|
909 | |
---|
910 | CompoundStmt *EliminateTypedef::mutate( CompoundStmt * compoundStmt ) { |
---|
911 | TypedefMap oldNames = typedefNames; |
---|
912 | scopeLevel += 1; |
---|
913 | CompoundStmt *ret = Mutator::mutate( compoundStmt ); |
---|
914 | scopeLevel -= 1; |
---|
915 | std::list< Statement * >::iterator i = compoundStmt->get_kids().begin(); |
---|
916 | while ( i != compoundStmt->get_kids().end() ) { |
---|
917 | std::list< Statement * >::iterator next = i+1; |
---|
918 | if ( DeclStmt *declStmt = dynamic_cast< DeclStmt * >( *i ) ) { |
---|
919 | if ( dynamic_cast< TypedefDecl * >( declStmt->get_decl() ) ) { |
---|
920 | delete *i; |
---|
921 | compoundStmt->get_kids().erase( i ); |
---|
922 | } // if |
---|
923 | } // if |
---|
924 | i = next; |
---|
925 | } // while |
---|
926 | typedefNames = oldNames; |
---|
927 | return ret; |
---|
928 | } |
---|
929 | |
---|
930 | // there may be typedefs nested within aggregates |
---|
931 | // in order for everything to work properly, these |
---|
932 | // should be removed as well |
---|
933 | template<typename AggDecl> |
---|
934 | AggDecl *EliminateTypedef::handleAggregate( AggDecl * aggDecl ) { |
---|
935 | std::list<Declaration *>::iterator it = aggDecl->get_members().begin(); |
---|
936 | for ( ; it != aggDecl->get_members().end(); ) { |
---|
937 | std::list< Declaration * >::iterator next = it+1; |
---|
938 | if ( dynamic_cast< TypedefDecl * >( *it ) ) { |
---|
939 | delete *it; |
---|
940 | aggDecl->get_members().erase( it ); |
---|
941 | } // if |
---|
942 | it = next; |
---|
943 | } |
---|
944 | return aggDecl; |
---|
945 | } |
---|
946 | |
---|
947 | Declaration *EliminateTypedef::mutate( StructDecl * structDecl ) { |
---|
948 | Mutator::mutate( structDecl ); |
---|
949 | return handleAggregate( structDecl ); |
---|
950 | } |
---|
951 | |
---|
952 | Declaration *EliminateTypedef::mutate( UnionDecl * unionDecl ) { |
---|
953 | Mutator::mutate( unionDecl ); |
---|
954 | return handleAggregate( unionDecl ); |
---|
955 | } |
---|
956 | |
---|
957 | Declaration *EliminateTypedef::mutate( EnumDecl * enumDecl ) { |
---|
958 | Mutator::mutate( enumDecl ); |
---|
959 | return handleAggregate( enumDecl ); |
---|
960 | } |
---|
961 | |
---|
962 | Declaration *EliminateTypedef::mutate( ContextDecl * contextDecl ) { |
---|
963 | Mutator::mutate( contextDecl ); |
---|
964 | return handleAggregate( contextDecl ); |
---|
965 | } |
---|
966 | |
---|
967 | } // namespace SymTab |
---|
968 | |
---|
969 | // Local Variables: // |
---|
970 | // tab-width: 4 // |
---|
971 | // mode: c++ // |
---|
972 | // compile-command: "make install" // |
---|
973 | // End: // |
---|