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 : Andrew Beach |
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12 | // Last Modified On : Fri Apr 29 9:45:00 2022 |
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13 | // Update Count : 365 |
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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. A function |
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26 | // taking no arguments has no argument types. |
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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 "Validate.h" |
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41 | |
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42 | #include <cassert> // for assertf, assert |
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43 | #include <cstddef> // for size_t |
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44 | #include <list> // for list |
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45 | #include <string> // for string |
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46 | #include <unordered_map> // for unordered_map |
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47 | #include <utility> // for pair |
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48 | |
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49 | #include "AST/Chain.hpp" |
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50 | #include "AST/Decl.hpp" |
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51 | #include "AST/Node.hpp" |
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52 | #include "AST/Pass.hpp" |
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53 | #include "AST/SymbolTable.hpp" |
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54 | #include "AST/Type.hpp" |
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55 | #include "AST/TypeSubstitution.hpp" |
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56 | #include "CodeGen/CodeGenerator.h" // for genName |
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57 | #include "CodeGen/OperatorTable.h" // for isCtorDtor, isCtorDtorAssign |
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58 | #include "ControlStruct/Mutate.h" // for ForExprMutator |
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59 | #include "Common/CodeLocation.h" // for CodeLocation |
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60 | #include "Common/Stats.h" // for Stats::Heap |
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61 | #include "Common/PassVisitor.h" // for PassVisitor, WithDeclsToAdd |
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62 | #include "Common/ScopedMap.h" // for ScopedMap |
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63 | #include "Common/SemanticError.h" // for SemanticError |
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64 | #include "Common/UniqueName.h" // for UniqueName |
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65 | #include "Common/utility.h" // for operator+, cloneAll, deleteAll |
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66 | #include "CompilationState.h" // skip some passes in new-ast build |
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67 | #include "Concurrency/Keywords.h" // for applyKeywords |
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68 | #include "FixFunction.h" // for FixFunction |
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69 | #include "Indexer.h" // for Indexer |
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70 | #include "InitTweak/GenInit.h" // for fixReturnStatements |
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71 | #include "InitTweak/InitTweak.h" // for isCtorDtorAssign |
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72 | #include "ResolvExpr/typeops.h" // for typesCompatible |
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73 | #include "ResolvExpr/Resolver.h" // for findSingleExpression |
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74 | #include "ResolvExpr/ResolveTypeof.h" // for resolveTypeof |
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75 | #include "SymTab/Autogen.h" // for SizeType |
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76 | #include "SynTree/LinkageSpec.h" // for C |
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77 | #include "SynTree/Attribute.h" // for noAttributes, Attribute |
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78 | #include "SynTree/Constant.h" // for Constant |
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79 | #include "SynTree/Declaration.h" // for ObjectDecl, DeclarationWithType |
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80 | #include "SynTree/Expression.h" // for CompoundLiteralExpr, Expressio... |
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81 | #include "SynTree/Initializer.h" // for ListInit, Initializer |
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82 | #include "SynTree/Label.h" // for operator==, Label |
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83 | #include "SynTree/Mutator.h" // for Mutator |
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84 | #include "SynTree/Type.h" // for Type, TypeInstType, EnumInstType |
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85 | #include "SynTree/TypeSubstitution.h" // for TypeSubstitution |
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86 | #include "SynTree/Visitor.h" // for Visitor |
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87 | #include "Validate/HandleAttributes.h" // for handleAttributes |
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88 | #include "Validate/FindSpecialDecls.h" // for FindSpecialDecls |
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89 | |
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90 | class CompoundStmt; |
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91 | class ReturnStmt; |
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92 | class SwitchStmt; |
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93 | |
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94 | #define debugPrint( x ) if ( doDebug ) x |
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95 | |
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96 | namespace SymTab { |
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97 | /// hoists declarations that are difficult to hoist while parsing |
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98 | struct HoistTypeDecls final : public WithDeclsToAdd { |
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99 | void previsit( SizeofExpr * ); |
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100 | void previsit( AlignofExpr * ); |
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101 | void previsit( UntypedOffsetofExpr * ); |
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102 | void previsit( CompoundLiteralExpr * ); |
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103 | void handleType( Type * ); |
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104 | }; |
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105 | |
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106 | struct FixQualifiedTypes final : public WithIndexer { |
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107 | FixQualifiedTypes() : WithIndexer(false) {} |
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108 | Type * postmutate( QualifiedType * ); |
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109 | }; |
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110 | |
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111 | struct HoistStruct final : public WithDeclsToAdd, public WithGuards { |
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112 | /// Flattens nested struct types |
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113 | static void hoistStruct( std::list< Declaration * > &translationUnit ); |
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114 | |
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115 | void previsit( StructDecl * aggregateDecl ); |
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116 | void previsit( UnionDecl * aggregateDecl ); |
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117 | void previsit( StaticAssertDecl * assertDecl ); |
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118 | void previsit( StructInstType * type ); |
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119 | void previsit( UnionInstType * type ); |
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120 | void previsit( EnumInstType * type ); |
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121 | |
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122 | private: |
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123 | template< typename AggDecl > void handleAggregate( AggDecl * aggregateDecl ); |
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124 | |
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125 | AggregateDecl * parentAggr = nullptr; |
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126 | }; |
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127 | |
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128 | /// Fix return types so that every function returns exactly one value |
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129 | struct ReturnTypeFixer { |
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130 | static void fix( std::list< Declaration * > &translationUnit ); |
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131 | |
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132 | void postvisit( FunctionDecl * functionDecl ); |
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133 | void postvisit( FunctionType * ftype ); |
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134 | }; |
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135 | |
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136 | /// Replaces enum types by int, and function or array types in function parameter and return lists by appropriate pointers. |
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137 | struct EnumAndPointerDecay_old { |
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138 | void previsit( EnumDecl * aggregateDecl ); |
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139 | void previsit( FunctionType * func ); |
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140 | }; |
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141 | |
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142 | /// Associates forward declarations of aggregates with their definitions |
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143 | struct LinkReferenceToTypes_old final : public WithIndexer, public WithGuards, public WithVisitorRef<LinkReferenceToTypes_old>, public WithShortCircuiting { |
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144 | LinkReferenceToTypes_old( const Indexer * indexer ); |
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145 | |
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146 | void postvisit( TypeInstType * typeInst ); |
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147 | |
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148 | void postvisit( EnumInstType * enumInst ); |
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149 | void postvisit( StructInstType * structInst ); |
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150 | void postvisit( UnionInstType * unionInst ); |
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151 | void postvisit( TraitInstType * traitInst ); |
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152 | void previsit( QualifiedType * qualType ); |
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153 | void postvisit( QualifiedType * qualType ); |
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154 | |
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155 | void postvisit( EnumDecl * enumDecl ); |
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156 | void postvisit( StructDecl * structDecl ); |
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157 | void postvisit( UnionDecl * unionDecl ); |
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158 | void postvisit( TraitDecl * traitDecl ); |
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159 | |
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160 | void previsit( StructDecl * structDecl ); |
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161 | void previsit( UnionDecl * unionDecl ); |
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162 | |
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163 | void renameGenericParams( std::list< TypeDecl * > & params ); |
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164 | |
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165 | private: |
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166 | const Indexer * local_indexer; |
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167 | |
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168 | typedef std::map< std::string, std::list< EnumInstType * > > ForwardEnumsType; |
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169 | typedef std::map< std::string, std::list< StructInstType * > > ForwardStructsType; |
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170 | typedef std::map< std::string, std::list< UnionInstType * > > ForwardUnionsType; |
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171 | ForwardEnumsType forwardEnums; |
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172 | ForwardStructsType forwardStructs; |
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173 | ForwardUnionsType forwardUnions; |
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174 | /// true if currently in a generic type body, so that type parameter instances can be renamed appropriately |
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175 | bool inGeneric = false; |
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176 | }; |
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177 | |
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178 | /// Does early resolution on the expressions that give enumeration constants their values |
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179 | struct ResolveEnumInitializers final : public WithIndexer, public WithGuards, public WithVisitorRef<ResolveEnumInitializers>, public WithShortCircuiting { |
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180 | ResolveEnumInitializers( const Indexer * indexer ); |
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181 | void postvisit( EnumDecl * enumDecl ); |
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182 | |
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183 | private: |
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184 | const Indexer * local_indexer; |
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185 | |
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186 | }; |
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187 | |
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188 | /// Replaces array and function types in forall lists by appropriate pointer type and assigns each Object and Function declaration a unique ID. |
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189 | struct ForallPointerDecay_old final { |
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190 | void previsit( ObjectDecl * object ); |
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191 | void previsit( FunctionDecl * func ); |
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192 | void previsit( FunctionType * ftype ); |
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193 | void previsit( StructDecl * aggrDecl ); |
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194 | void previsit( UnionDecl * aggrDecl ); |
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195 | }; |
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196 | |
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197 | // These structs are the sub-sub-passes of ForallPointerDecay_old. |
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198 | |
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199 | struct TraitExpander_old final { |
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200 | void previsit( FunctionType * ); |
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201 | void previsit( StructDecl * ); |
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202 | void previsit( UnionDecl * ); |
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203 | }; |
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204 | |
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205 | struct AssertionFixer_old final { |
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206 | void previsit( FunctionType * ); |
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207 | void previsit( StructDecl * ); |
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208 | void previsit( UnionDecl * ); |
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209 | }; |
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210 | |
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211 | struct CheckOperatorTypes_old final { |
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212 | void previsit( ObjectDecl * ); |
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213 | }; |
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214 | |
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215 | struct FixUniqueIds_old final { |
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216 | void previsit( DeclarationWithType * ); |
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217 | }; |
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218 | |
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219 | struct ReturnChecker : public WithGuards { |
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220 | /// Checks that return statements return nothing if their return type is void |
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221 | /// and return something if the return type is non-void. |
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222 | static void checkFunctionReturns( std::list< Declaration * > & translationUnit ); |
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223 | |
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224 | void previsit( FunctionDecl * functionDecl ); |
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225 | void previsit( ReturnStmt * returnStmt ); |
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226 | |
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227 | typedef std::list< DeclarationWithType * > ReturnVals; |
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228 | ReturnVals returnVals; |
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229 | }; |
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230 | |
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231 | struct ReplaceTypedef final : public WithVisitorRef<ReplaceTypedef>, public WithGuards, public WithShortCircuiting, public WithDeclsToAdd { |
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232 | ReplaceTypedef() : scopeLevel( 0 ) {} |
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233 | /// Replaces typedefs by forward declarations |
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234 | static void replaceTypedef( std::list< Declaration * > &translationUnit ); |
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235 | |
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236 | void premutate( QualifiedType * ); |
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237 | Type * postmutate( QualifiedType * qualType ); |
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238 | Type * postmutate( TypeInstType * aggregateUseType ); |
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239 | Declaration * postmutate( TypedefDecl * typeDecl ); |
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240 | void premutate( TypeDecl * typeDecl ); |
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241 | void premutate( FunctionDecl * funcDecl ); |
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242 | void premutate( ObjectDecl * objDecl ); |
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243 | DeclarationWithType * postmutate( ObjectDecl * objDecl ); |
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244 | |
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245 | void premutate( CastExpr * castExpr ); |
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246 | |
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247 | void premutate( CompoundStmt * compoundStmt ); |
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248 | |
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249 | void premutate( StructDecl * structDecl ); |
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250 | void premutate( UnionDecl * unionDecl ); |
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251 | void premutate( EnumDecl * enumDecl ); |
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252 | void premutate( TraitDecl * ); |
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253 | |
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254 | void premutate( FunctionType * ftype ); |
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255 | |
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256 | private: |
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257 | template<typename AggDecl> |
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258 | void addImplicitTypedef( AggDecl * aggDecl ); |
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259 | template< typename AggDecl > |
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260 | void handleAggregate( AggDecl * aggr ); |
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261 | |
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262 | typedef std::unique_ptr<TypedefDecl> TypedefDeclPtr; |
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263 | typedef ScopedMap< std::string, std::pair< TypedefDeclPtr, int > > TypedefMap; |
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264 | typedef ScopedMap< std::string, TypeDecl * > TypeDeclMap; |
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265 | TypedefMap typedefNames; |
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266 | TypeDeclMap typedeclNames; |
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267 | int scopeLevel; |
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268 | bool inFunctionType = false; |
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269 | }; |
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270 | |
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271 | struct EliminateTypedef { |
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272 | /// removes TypedefDecls from the AST |
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273 | static void eliminateTypedef( std::list< Declaration * > &translationUnit ); |
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274 | |
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275 | template<typename AggDecl> |
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276 | void handleAggregate( AggDecl * aggregateDecl ); |
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277 | |
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278 | void previsit( StructDecl * aggregateDecl ); |
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279 | void previsit( UnionDecl * aggregateDecl ); |
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280 | void previsit( CompoundStmt * compoundStmt ); |
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281 | }; |
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282 | |
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283 | struct VerifyCtorDtorAssign { |
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284 | /// ensure that constructors, destructors, and assignment have at least one |
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285 | /// parameter, the first of which must be a pointer, and that ctor/dtors have no |
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286 | /// return values. |
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287 | static void verify( std::list< Declaration * > &translationUnit ); |
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288 | |
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289 | void previsit( FunctionDecl * funcDecl ); |
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290 | }; |
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291 | |
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292 | /// ensure that generic types have the correct number of type arguments |
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293 | struct ValidateGenericParameters { |
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294 | void previsit( StructInstType * inst ); |
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295 | void previsit( UnionInstType * inst ); |
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296 | }; |
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297 | |
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298 | /// desugar declarations and uses of dimension paramaters like [N], |
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299 | /// from type-system managed values, to tunnneling via ordinary types, |
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300 | /// as char[-] in and sizeof(-) out |
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301 | struct TranslateDimensionGenericParameters : public WithIndexer, public WithGuards { |
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302 | static void translateDimensions( std::list< Declaration * > &translationUnit ); |
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303 | TranslateDimensionGenericParameters(); |
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304 | |
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305 | bool nextVisitedNodeIsChildOfSUIT = false; // SUIT = Struct or Union -Inst Type |
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306 | bool visitingChildOfSUIT = false; |
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307 | void changeState_ChildOfSUIT( bool newVal ); |
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308 | void premutate( StructInstType * sit ); |
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309 | void premutate( UnionInstType * uit ); |
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310 | void premutate( BaseSyntaxNode * node ); |
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311 | |
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312 | TypeDecl * postmutate( TypeDecl * td ); |
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313 | Expression * postmutate( DimensionExpr * de ); |
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314 | Expression * postmutate( Expression * e ); |
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315 | }; |
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316 | |
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317 | struct FixObjectType : public WithIndexer { |
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318 | /// resolves typeof type in object, function, and type declarations |
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319 | static void fix( std::list< Declaration * > & translationUnit ); |
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320 | |
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321 | void previsit( ObjectDecl * ); |
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322 | void previsit( FunctionDecl * ); |
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323 | void previsit( TypeDecl * ); |
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324 | }; |
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325 | |
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326 | struct InitializerLength { |
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327 | /// for array types without an explicit length, compute the length and store it so that it |
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328 | /// is known to the rest of the phases. For example, |
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329 | /// int x[] = { 1, 2, 3 }; |
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330 | /// int y[][2] = { { 1, 2, 3 }, { 1, 2, 3 } }; |
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331 | /// here x and y are known at compile-time to have length 3, so change this into |
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332 | /// int x[3] = { 1, 2, 3 }; |
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333 | /// int y[3][2] = { { 1, 2, 3 }, { 1, 2, 3 } }; |
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334 | static void computeLength( std::list< Declaration * > & translationUnit ); |
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335 | |
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336 | void previsit( ObjectDecl * objDecl ); |
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337 | }; |
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338 | |
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339 | struct ArrayLength : public WithIndexer { |
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340 | static void computeLength( std::list< Declaration * > & translationUnit ); |
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341 | |
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342 | void previsit( ArrayType * arrayType ); |
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343 | }; |
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344 | |
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345 | struct CompoundLiteral final : public WithDeclsToAdd, public WithVisitorRef<CompoundLiteral> { |
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346 | Type::StorageClasses storageClasses; |
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347 | |
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348 | void premutate( ObjectDecl * objectDecl ); |
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349 | Expression * postmutate( CompoundLiteralExpr * compLitExpr ); |
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350 | }; |
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351 | |
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352 | struct LabelAddressFixer final : public WithGuards { |
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353 | std::set< Label > labels; |
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354 | |
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355 | void premutate( FunctionDecl * funcDecl ); |
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356 | Expression * postmutate( AddressExpr * addrExpr ); |
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357 | }; |
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358 | |
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359 | void validate_A( std::list< Declaration * > & translationUnit ) { |
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360 | PassVisitor<EnumAndPointerDecay_old> epc; |
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361 | PassVisitor<HoistTypeDecls> hoistDecls; |
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362 | { |
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363 | Stats::Heap::newPass("validate-A"); |
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364 | Stats::Time::BlockGuard guard("validate-A"); |
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365 | VerifyCtorDtorAssign::verify( translationUnit ); // must happen before autogen, because autogen examines existing ctor/dtors |
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366 | acceptAll( translationUnit, hoistDecls ); |
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367 | ReplaceTypedef::replaceTypedef( translationUnit ); |
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368 | ReturnTypeFixer::fix( translationUnit ); // must happen before autogen |
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369 | acceptAll( translationUnit, epc ); // must happen before VerifyCtorDtorAssign, because void return objects should not exist; before LinkReferenceToTypes_old because it is an indexer and needs correct types for mangling |
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370 | } |
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371 | } |
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372 | |
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373 | void linkReferenceToTypes( std::list< Declaration * > & translationUnit ) { |
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374 | PassVisitor<LinkReferenceToTypes_old> lrt( nullptr ); |
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375 | acceptAll( translationUnit, lrt ); // must happen before autogen, because sized flag needs to propagate to generated functions |
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376 | } |
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377 | |
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378 | void validate_B( std::list< Declaration * > & translationUnit ) { |
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379 | PassVisitor<FixQualifiedTypes> fixQual; |
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380 | { |
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381 | Stats::Heap::newPass("validate-B"); |
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382 | Stats::Time::BlockGuard guard("validate-B"); |
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383 | //linkReferenceToTypes( translationUnit ); |
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384 | mutateAll( translationUnit, fixQual ); // must happen after LinkReferenceToTypes_old, because aggregate members are accessed |
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385 | HoistStruct::hoistStruct( translationUnit ); |
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386 | EliminateTypedef::eliminateTypedef( translationUnit ); |
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387 | } |
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388 | } |
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389 | |
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390 | void validate_C( std::list< Declaration * > & translationUnit ) { |
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391 | PassVisitor<ValidateGenericParameters> genericParams; |
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392 | PassVisitor<ResolveEnumInitializers> rei( nullptr ); |
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393 | { |
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394 | Stats::Heap::newPass("validate-C"); |
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395 | Stats::Time::BlockGuard guard("validate-C"); |
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396 | Stats::Time::TimeBlock("Validate Generic Parameters", [&]() { |
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397 | acceptAll( translationUnit, genericParams ); // check as early as possible - can't happen before LinkReferenceToTypes_old; observed failing when attempted before eliminateTypedef |
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398 | }); |
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399 | Stats::Time::TimeBlock("Translate Dimensions", [&]() { |
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400 | TranslateDimensionGenericParameters::translateDimensions( translationUnit ); |
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401 | }); |
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402 | if (!useNewAST) { |
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403 | Stats::Time::TimeBlock("Resolve Enum Initializers", [&]() { |
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404 | acceptAll( translationUnit, rei ); // must happen after translateDimensions because rei needs identifier lookup, which needs name mangling |
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405 | }); |
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406 | } |
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407 | Stats::Time::TimeBlock("Check Function Returns", [&]() { |
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408 | ReturnChecker::checkFunctionReturns( translationUnit ); |
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409 | }); |
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410 | Stats::Time::TimeBlock("Fix Return Statements", [&]() { |
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411 | InitTweak::fixReturnStatements( translationUnit ); // must happen before autogen |
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412 | }); |
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413 | } |
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414 | } |
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415 | |
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416 | static void decayForallPointers( std::list< Declaration * > & translationUnit ) { |
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417 | PassVisitor<TraitExpander_old> te; |
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418 | acceptAll( translationUnit, te ); |
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419 | PassVisitor<AssertionFixer_old> af; |
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420 | acceptAll( translationUnit, af ); |
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421 | PassVisitor<CheckOperatorTypes_old> cot; |
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422 | acceptAll( translationUnit, cot ); |
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423 | PassVisitor<FixUniqueIds_old> fui; |
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424 | acceptAll( translationUnit, fui ); |
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425 | } |
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426 | |
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427 | void validate_D( std::list< Declaration * > & translationUnit ) { |
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428 | { |
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429 | Stats::Heap::newPass("validate-D"); |
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430 | Stats::Time::BlockGuard guard("validate-D"); |
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431 | Stats::Time::TimeBlock("Apply Concurrent Keywords", [&]() { |
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432 | Concurrency::applyKeywords( translationUnit ); |
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433 | }); |
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434 | Stats::Time::TimeBlock("Forall Pointer Decay", [&]() { |
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435 | decayForallPointers( translationUnit ); // must happen before autogenerateRoutines, after Concurrency::applyKeywords because uniqueIds must be set on declaration before resolution |
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436 | }); |
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437 | Stats::Time::TimeBlock("Hoist Control Declarations", [&]() { |
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438 | ControlStruct::hoistControlDecls( translationUnit ); // hoist initialization out of for statements; must happen before autogenerateRoutines |
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439 | }); |
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440 | Stats::Time::TimeBlock("Generate Autogen routines", [&]() { |
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441 | autogenerateRoutines( translationUnit ); // moved up, used to be below compoundLiteral - currently needs EnumAndPointerDecay_old |
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442 | }); |
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443 | } |
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444 | } |
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445 | |
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446 | void validate_E( std::list< Declaration * > & translationUnit ) { |
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447 | PassVisitor<CompoundLiteral> compoundliteral; |
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448 | { |
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449 | Stats::Heap::newPass("validate-E"); |
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450 | Stats::Time::BlockGuard guard("validate-E"); |
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451 | Stats::Time::TimeBlock("Implement Mutex Func", [&]() { |
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452 | Concurrency::implementMutexFuncs( translationUnit ); |
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453 | }); |
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454 | Stats::Time::TimeBlock("Implement Thread Start", [&]() { |
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455 | Concurrency::implementThreadStarter( translationUnit ); |
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456 | }); |
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457 | Stats::Time::TimeBlock("Compound Literal", [&]() { |
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458 | mutateAll( translationUnit, compoundliteral ); |
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459 | }); |
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460 | if (!useNewAST) { |
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461 | Stats::Time::TimeBlock("Resolve With Expressions", [&]() { |
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462 | ResolvExpr::resolveWithExprs( translationUnit ); // must happen before FixObjectType because user-code is resolved and may contain with variables |
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463 | }); |
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464 | } |
---|
465 | } |
---|
466 | } |
---|
467 | |
---|
468 | void validate_F( std::list< Declaration * > & translationUnit ) { |
---|
469 | PassVisitor<LabelAddressFixer> labelAddrFixer; |
---|
470 | { |
---|
471 | Stats::Heap::newPass("validate-F"); |
---|
472 | Stats::Time::BlockGuard guard("validate-F"); |
---|
473 | if (!useNewAST) { |
---|
474 | Stats::Time::TimeCall("Fix Object Type", |
---|
475 | FixObjectType::fix, translationUnit); |
---|
476 | } |
---|
477 | Stats::Time::TimeCall("Initializer Length", |
---|
478 | InitializerLength::computeLength, translationUnit); |
---|
479 | if (!useNewAST) { |
---|
480 | Stats::Time::TimeCall("Array Length", |
---|
481 | ArrayLength::computeLength, translationUnit); |
---|
482 | } |
---|
483 | Stats::Time::TimeCall("Find Special Declarations", |
---|
484 | Validate::findSpecialDecls, translationUnit); |
---|
485 | Stats::Time::TimeCall("Fix Label Address", |
---|
486 | mutateAll<LabelAddressFixer>, translationUnit, labelAddrFixer); |
---|
487 | if (!useNewAST) { |
---|
488 | Stats::Time::TimeCall("Handle Attributes", |
---|
489 | Validate::handleAttributes, translationUnit); |
---|
490 | } |
---|
491 | } |
---|
492 | } |
---|
493 | |
---|
494 | void validate( std::list< Declaration * > &translationUnit, __attribute__((unused)) bool doDebug ) { |
---|
495 | validate_A( translationUnit ); |
---|
496 | validate_B( translationUnit ); |
---|
497 | validate_C( translationUnit ); |
---|
498 | validate_D( translationUnit ); |
---|
499 | validate_E( translationUnit ); |
---|
500 | validate_F( translationUnit ); |
---|
501 | } |
---|
502 | |
---|
503 | void validateType( Type * type, const Indexer * indexer ) { |
---|
504 | PassVisitor<EnumAndPointerDecay_old> epc; |
---|
505 | PassVisitor<LinkReferenceToTypes_old> lrt( indexer ); |
---|
506 | PassVisitor<TraitExpander_old> te; |
---|
507 | PassVisitor<AssertionFixer_old> af; |
---|
508 | PassVisitor<CheckOperatorTypes_old> cot; |
---|
509 | PassVisitor<FixUniqueIds_old> fui; |
---|
510 | type->accept( epc ); |
---|
511 | type->accept( lrt ); |
---|
512 | type->accept( te ); |
---|
513 | type->accept( af ); |
---|
514 | type->accept( cot ); |
---|
515 | type->accept( fui ); |
---|
516 | } |
---|
517 | |
---|
518 | void HoistTypeDecls::handleType( Type * type ) { |
---|
519 | // some type declarations are buried in expressions and not easy to hoist during parsing; hoist them here |
---|
520 | AggregateDecl * aggr = nullptr; |
---|
521 | if ( StructInstType * inst = dynamic_cast< StructInstType * >( type ) ) { |
---|
522 | aggr = inst->baseStruct; |
---|
523 | } else if ( UnionInstType * inst = dynamic_cast< UnionInstType * >( type ) ) { |
---|
524 | aggr = inst->baseUnion; |
---|
525 | } else if ( EnumInstType * inst = dynamic_cast< EnumInstType * >( type ) ) { |
---|
526 | aggr = inst->baseEnum; |
---|
527 | } |
---|
528 | if ( aggr && aggr->body ) { |
---|
529 | declsToAddBefore.push_front( aggr ); |
---|
530 | } |
---|
531 | } |
---|
532 | |
---|
533 | void HoistTypeDecls::previsit( SizeofExpr * expr ) { |
---|
534 | handleType( expr->type ); |
---|
535 | } |
---|
536 | |
---|
537 | void HoistTypeDecls::previsit( AlignofExpr * expr ) { |
---|
538 | handleType( expr->type ); |
---|
539 | } |
---|
540 | |
---|
541 | void HoistTypeDecls::previsit( UntypedOffsetofExpr * expr ) { |
---|
542 | handleType( expr->type ); |
---|
543 | } |
---|
544 | |
---|
545 | void HoistTypeDecls::previsit( CompoundLiteralExpr * expr ) { |
---|
546 | handleType( expr->result ); |
---|
547 | } |
---|
548 | |
---|
549 | |
---|
550 | Type * FixQualifiedTypes::postmutate( QualifiedType * qualType ) { |
---|
551 | Type * parent = qualType->parent; |
---|
552 | Type * child = qualType->child; |
---|
553 | if ( dynamic_cast< GlobalScopeType * >( qualType->parent ) ) { |
---|
554 | // .T => lookup T at global scope |
---|
555 | if ( TypeInstType * inst = dynamic_cast< TypeInstType * >( child ) ) { |
---|
556 | auto td = indexer.globalLookupType( inst->name ); |
---|
557 | if ( ! td ) { |
---|
558 | SemanticError( qualType->location, toString("Use of undefined global type ", inst->name) ); |
---|
559 | } |
---|
560 | auto base = td->base; |
---|
561 | assert( base ); |
---|
562 | Type * ret = base->clone(); |
---|
563 | ret->get_qualifiers() = qualType->get_qualifiers(); |
---|
564 | return ret; |
---|
565 | } else { |
---|
566 | // .T => T is not a type name |
---|
567 | assertf( false, "unhandled global qualified child type: %s", toCString(child) ); |
---|
568 | } |
---|
569 | } else { |
---|
570 | // S.T => S must be an aggregate type, find the declaration for T in S. |
---|
571 | AggregateDecl * aggr = nullptr; |
---|
572 | if ( StructInstType * inst = dynamic_cast< StructInstType * >( parent ) ) { |
---|
573 | aggr = inst->baseStruct; |
---|
574 | } else if ( UnionInstType * inst = dynamic_cast< UnionInstType * > ( parent ) ) { |
---|
575 | aggr = inst->baseUnion; |
---|
576 | } else { |
---|
577 | SemanticError( qualType->location, toString("Qualified type requires an aggregate on the left, but has: ", parent) ); |
---|
578 | } |
---|
579 | assert( aggr ); // TODO: need to handle forward declarations |
---|
580 | for ( Declaration * member : aggr->members ) { |
---|
581 | if ( TypeInstType * inst = dynamic_cast< TypeInstType * >( child ) ) { |
---|
582 | // name on the right is a typedef |
---|
583 | if ( NamedTypeDecl * aggr = dynamic_cast< NamedTypeDecl * > ( member ) ) { |
---|
584 | if ( aggr->name == inst->name ) { |
---|
585 | assert( aggr->base ); |
---|
586 | Type * ret = aggr->base->clone(); |
---|
587 | ret->get_qualifiers() = qualType->get_qualifiers(); |
---|
588 | TypeSubstitution sub = parent->genericSubstitution(); |
---|
589 | sub.apply(ret); |
---|
590 | return ret; |
---|
591 | } |
---|
592 | } |
---|
593 | } else { |
---|
594 | // S.T - S is not an aggregate => error |
---|
595 | assertf( false, "unhandled qualified child type: %s", toCString(qualType) ); |
---|
596 | } |
---|
597 | } |
---|
598 | // failed to find a satisfying definition of type |
---|
599 | SemanticError( qualType->location, toString("Undefined type in qualified type: ", qualType) ); |
---|
600 | } |
---|
601 | |
---|
602 | // ... may want to link canonical SUE definition to each forward decl so that it becomes easier to lookup? |
---|
603 | } |
---|
604 | |
---|
605 | |
---|
606 | void HoistStruct::hoistStruct( std::list< Declaration * > &translationUnit ) { |
---|
607 | PassVisitor<HoistStruct> hoister; |
---|
608 | acceptAll( translationUnit, hoister ); |
---|
609 | } |
---|
610 | |
---|
611 | bool shouldHoist( Declaration * decl ) { |
---|
612 | return dynamic_cast< StructDecl * >( decl ) || dynamic_cast< UnionDecl * >( decl ) || dynamic_cast< StaticAssertDecl * >( decl ); |
---|
613 | } |
---|
614 | |
---|
615 | namespace { |
---|
616 | void qualifiedName( AggregateDecl * aggr, std::ostringstream & ss ) { |
---|
617 | if ( aggr->parent ) qualifiedName( aggr->parent, ss ); |
---|
618 | ss << "__" << aggr->name; |
---|
619 | } |
---|
620 | |
---|
621 | // mangle nested type names using entire parent chain |
---|
622 | std::string qualifiedName( AggregateDecl * aggr ) { |
---|
623 | std::ostringstream ss; |
---|
624 | qualifiedName( aggr, ss ); |
---|
625 | return ss.str(); |
---|
626 | } |
---|
627 | } |
---|
628 | |
---|
629 | template< typename AggDecl > |
---|
630 | void HoistStruct::handleAggregate( AggDecl * aggregateDecl ) { |
---|
631 | if ( parentAggr ) { |
---|
632 | aggregateDecl->parent = parentAggr; |
---|
633 | aggregateDecl->name = qualifiedName( aggregateDecl ); |
---|
634 | // Add elements in stack order corresponding to nesting structure. |
---|
635 | declsToAddBefore.push_front( aggregateDecl ); |
---|
636 | } else { |
---|
637 | GuardValue( parentAggr ); |
---|
638 | parentAggr = aggregateDecl; |
---|
639 | } // if |
---|
640 | // Always remove the hoisted aggregate from the inner structure. |
---|
641 | GuardAction( [aggregateDecl]() { filter( aggregateDecl->members, shouldHoist, false ); } ); |
---|
642 | } |
---|
643 | |
---|
644 | void HoistStruct::previsit( StaticAssertDecl * assertDecl ) { |
---|
645 | if ( parentAggr ) { |
---|
646 | declsToAddBefore.push_back( assertDecl ); |
---|
647 | } |
---|
648 | } |
---|
649 | |
---|
650 | void HoistStruct::previsit( StructDecl * aggregateDecl ) { |
---|
651 | handleAggregate( aggregateDecl ); |
---|
652 | } |
---|
653 | |
---|
654 | void HoistStruct::previsit( UnionDecl * aggregateDecl ) { |
---|
655 | handleAggregate( aggregateDecl ); |
---|
656 | } |
---|
657 | |
---|
658 | void HoistStruct::previsit( StructInstType * type ) { |
---|
659 | // need to reset type name after expanding to qualified name |
---|
660 | assert( type->baseStruct ); |
---|
661 | type->name = type->baseStruct->name; |
---|
662 | } |
---|
663 | |
---|
664 | void HoistStruct::previsit( UnionInstType * type ) { |
---|
665 | assert( type->baseUnion ); |
---|
666 | type->name = type->baseUnion->name; |
---|
667 | } |
---|
668 | |
---|
669 | void HoistStruct::previsit( EnumInstType * type ) { |
---|
670 | assert( type->baseEnum ); |
---|
671 | type->name = type->baseEnum->name; |
---|
672 | } |
---|
673 | |
---|
674 | |
---|
675 | bool isTypedef( Declaration * decl ) { |
---|
676 | return dynamic_cast< TypedefDecl * >( decl ); |
---|
677 | } |
---|
678 | |
---|
679 | void EliminateTypedef::eliminateTypedef( std::list< Declaration * > &translationUnit ) { |
---|
680 | PassVisitor<EliminateTypedef> eliminator; |
---|
681 | acceptAll( translationUnit, eliminator ); |
---|
682 | filter( translationUnit, isTypedef, true ); |
---|
683 | } |
---|
684 | |
---|
685 | template< typename AggDecl > |
---|
686 | void EliminateTypedef::handleAggregate( AggDecl * aggregateDecl ) { |
---|
687 | filter( aggregateDecl->members, isTypedef, true ); |
---|
688 | } |
---|
689 | |
---|
690 | void EliminateTypedef::previsit( StructDecl * aggregateDecl ) { |
---|
691 | handleAggregate( aggregateDecl ); |
---|
692 | } |
---|
693 | |
---|
694 | void EliminateTypedef::previsit( UnionDecl * aggregateDecl ) { |
---|
695 | handleAggregate( aggregateDecl ); |
---|
696 | } |
---|
697 | |
---|
698 | void EliminateTypedef::previsit( CompoundStmt * compoundStmt ) { |
---|
699 | // remove and delete decl stmts |
---|
700 | filter( compoundStmt->kids, [](Statement * stmt) { |
---|
701 | if ( DeclStmt * declStmt = dynamic_cast< DeclStmt * >( stmt ) ) { |
---|
702 | if ( dynamic_cast< TypedefDecl * >( declStmt->decl ) ) { |
---|
703 | return true; |
---|
704 | } // if |
---|
705 | } // if |
---|
706 | return false; |
---|
707 | }, true); |
---|
708 | } |
---|
709 | |
---|
710 | void EnumAndPointerDecay_old::previsit( EnumDecl * enumDecl ) { |
---|
711 | // Set the type of each member of the enumeration to be EnumConstant |
---|
712 | for ( std::list< Declaration * >::iterator i = enumDecl->members.begin(); i != enumDecl->members.end(); ++i ) { |
---|
713 | ObjectDecl * obj = dynamic_cast< ObjectDecl * >( * i ); |
---|
714 | assert( obj ); |
---|
715 | obj->set_type( new EnumInstType( Type::Qualifiers( Type::Const ), enumDecl->name ) ); |
---|
716 | } // for |
---|
717 | } |
---|
718 | |
---|
719 | namespace { |
---|
720 | template< typename DWTList > |
---|
721 | void fixFunctionList( DWTList & dwts, bool isVarArgs, FunctionType * func ) { |
---|
722 | auto nvals = dwts.size(); |
---|
723 | bool containsVoid = false; |
---|
724 | for ( auto & dwt : dwts ) { |
---|
725 | // fix each DWT and record whether a void was found |
---|
726 | containsVoid |= fixFunction( dwt ); |
---|
727 | } |
---|
728 | |
---|
729 | // the only case in which "void" is valid is where it is the only one in the list |
---|
730 | if ( containsVoid && ( nvals > 1 || isVarArgs ) ) { |
---|
731 | SemanticError( func, "invalid type void in function type " ); |
---|
732 | } |
---|
733 | |
---|
734 | // one void is the only thing in the list; remove it. |
---|
735 | if ( containsVoid ) { |
---|
736 | delete dwts.front(); |
---|
737 | dwts.clear(); |
---|
738 | } |
---|
739 | } |
---|
740 | } |
---|
741 | |
---|
742 | void EnumAndPointerDecay_old::previsit( FunctionType * func ) { |
---|
743 | // Fix up parameters and return types |
---|
744 | fixFunctionList( func->parameters, func->isVarArgs, func ); |
---|
745 | fixFunctionList( func->returnVals, false, func ); |
---|
746 | } |
---|
747 | |
---|
748 | LinkReferenceToTypes_old::LinkReferenceToTypes_old( const Indexer * other_indexer ) : WithIndexer( false ) { |
---|
749 | if ( other_indexer ) { |
---|
750 | local_indexer = other_indexer; |
---|
751 | } else { |
---|
752 | local_indexer = &indexer; |
---|
753 | } // if |
---|
754 | } |
---|
755 | |
---|
756 | void LinkReferenceToTypes_old::postvisit( EnumInstType * enumInst ) { |
---|
757 | const EnumDecl * st = local_indexer->lookupEnum( enumInst->name ); |
---|
758 | // it's not a semantic error if the enum is not found, just an implicit forward declaration |
---|
759 | if ( st ) { |
---|
760 | enumInst->baseEnum = const_cast<EnumDecl *>(st); // Just linking in the node |
---|
761 | } // if |
---|
762 | if ( ! st || ! st->body ) { |
---|
763 | // use of forward declaration |
---|
764 | forwardEnums[ enumInst->name ].push_back( enumInst ); |
---|
765 | } // if |
---|
766 | } |
---|
767 | |
---|
768 | void LinkReferenceToTypes_old::postvisit( StructInstType * structInst ) { |
---|
769 | const StructDecl * st = local_indexer->lookupStruct( structInst->name ); |
---|
770 | // it's not a semantic error if the struct is not found, just an implicit forward declaration |
---|
771 | if ( st ) { |
---|
772 | structInst->baseStruct = const_cast<StructDecl *>(st); // Just linking in the node |
---|
773 | } // if |
---|
774 | if ( ! st || ! st->body ) { |
---|
775 | // use of forward declaration |
---|
776 | forwardStructs[ structInst->name ].push_back( structInst ); |
---|
777 | } // if |
---|
778 | } |
---|
779 | |
---|
780 | void LinkReferenceToTypes_old::postvisit( UnionInstType * unionInst ) { |
---|
781 | const UnionDecl * un = local_indexer->lookupUnion( unionInst->name ); |
---|
782 | // it's not a semantic error if the union is not found, just an implicit forward declaration |
---|
783 | if ( un ) { |
---|
784 | unionInst->baseUnion = const_cast<UnionDecl *>(un); // Just linking in the node |
---|
785 | } // if |
---|
786 | if ( ! un || ! un->body ) { |
---|
787 | // use of forward declaration |
---|
788 | forwardUnions[ unionInst->name ].push_back( unionInst ); |
---|
789 | } // if |
---|
790 | } |
---|
791 | |
---|
792 | void LinkReferenceToTypes_old::previsit( QualifiedType * ) { |
---|
793 | visit_children = false; |
---|
794 | } |
---|
795 | |
---|
796 | void LinkReferenceToTypes_old::postvisit( QualifiedType * qualType ) { |
---|
797 | // linking only makes sense for the 'oldest ancestor' of the qualified type |
---|
798 | qualType->parent->accept( * visitor ); |
---|
799 | } |
---|
800 | |
---|
801 | template< typename Decl > |
---|
802 | void normalizeAssertions( std::list< Decl * > & assertions ) { |
---|
803 | // ensure no duplicate trait members after the clone |
---|
804 | auto pred = [](Decl * d1, Decl * d2) { |
---|
805 | // only care if they're equal |
---|
806 | DeclarationWithType * dwt1 = dynamic_cast<DeclarationWithType *>( d1 ); |
---|
807 | DeclarationWithType * dwt2 = dynamic_cast<DeclarationWithType *>( d2 ); |
---|
808 | if ( dwt1 && dwt2 ) { |
---|
809 | if ( dwt1->name == dwt2->name && ResolvExpr::typesCompatible( dwt1->get_type(), dwt2->get_type(), SymTab::Indexer() ) ) { |
---|
810 | // std::cerr << "=========== equal:" << std::endl; |
---|
811 | // std::cerr << "d1: " << d1 << std::endl; |
---|
812 | // std::cerr << "d2: " << d2 << std::endl; |
---|
813 | return false; |
---|
814 | } |
---|
815 | } |
---|
816 | return d1 < d2; |
---|
817 | }; |
---|
818 | std::set<Decl *, decltype(pred)> unique_members( assertions.begin(), assertions.end(), pred ); |
---|
819 | // if ( unique_members.size() != assertions.size() ) { |
---|
820 | // std::cerr << "============different" << std::endl; |
---|
821 | // std::cerr << unique_members.size() << " " << assertions.size() << std::endl; |
---|
822 | // } |
---|
823 | |
---|
824 | std::list< Decl * > order; |
---|
825 | order.splice( order.end(), assertions ); |
---|
826 | std::copy_if( order.begin(), order.end(), back_inserter( assertions ), [&]( Decl * decl ) { |
---|
827 | return unique_members.count( decl ); |
---|
828 | }); |
---|
829 | } |
---|
830 | |
---|
831 | // expand assertions from trait instance, performing the appropriate type variable substitutions |
---|
832 | template< typename Iterator > |
---|
833 | void expandAssertions( TraitInstType * inst, Iterator out ) { |
---|
834 | assertf( inst->baseTrait, "Trait instance not linked to base trait: %s", toCString( inst ) ); |
---|
835 | std::list< DeclarationWithType * > asserts; |
---|
836 | for ( Declaration * decl : inst->baseTrait->members ) { |
---|
837 | asserts.push_back( strict_dynamic_cast<DeclarationWithType *>( decl->clone() ) ); |
---|
838 | } |
---|
839 | // substitute trait decl parameters for instance parameters |
---|
840 | applySubstitution( inst->baseTrait->parameters.begin(), inst->baseTrait->parameters.end(), inst->parameters.begin(), asserts.begin(), asserts.end(), out ); |
---|
841 | } |
---|
842 | |
---|
843 | void LinkReferenceToTypes_old::postvisit( TraitDecl * traitDecl ) { |
---|
844 | if ( traitDecl->name == "sized" ) { |
---|
845 | // "sized" is a special trait - flick the sized status on for the type variable |
---|
846 | assertf( traitDecl->parameters.size() == 1, "Built-in trait 'sized' has incorrect number of parameters: %zd", traitDecl->parameters.size() ); |
---|
847 | TypeDecl * td = traitDecl->parameters.front(); |
---|
848 | td->set_sized( true ); |
---|
849 | } |
---|
850 | |
---|
851 | // move assertions from type parameters into the body of the trait |
---|
852 | for ( TypeDecl * td : traitDecl->parameters ) { |
---|
853 | for ( DeclarationWithType * assert : td->assertions ) { |
---|
854 | if ( TraitInstType * inst = dynamic_cast< TraitInstType * >( assert->get_type() ) ) { |
---|
855 | expandAssertions( inst, back_inserter( traitDecl->members ) ); |
---|
856 | } else { |
---|
857 | traitDecl->members.push_back( assert->clone() ); |
---|
858 | } |
---|
859 | } |
---|
860 | deleteAll( td->assertions ); |
---|
861 | td->assertions.clear(); |
---|
862 | } // for |
---|
863 | } |
---|
864 | |
---|
865 | void LinkReferenceToTypes_old::postvisit( TraitInstType * traitInst ) { |
---|
866 | // handle other traits |
---|
867 | const TraitDecl * traitDecl = local_indexer->lookupTrait( traitInst->name ); |
---|
868 | if ( ! traitDecl ) { |
---|
869 | SemanticError( traitInst->location, "use of undeclared trait " + traitInst->name ); |
---|
870 | } // if |
---|
871 | if ( traitDecl->parameters.size() != traitInst->parameters.size() ) { |
---|
872 | SemanticError( traitInst, "incorrect number of trait parameters: " ); |
---|
873 | } // if |
---|
874 | traitInst->baseTrait = const_cast<TraitDecl *>(traitDecl); // Just linking in the node |
---|
875 | |
---|
876 | // need to carry over the 'sized' status of each decl in the instance |
---|
877 | for ( auto p : group_iterate( traitDecl->parameters, traitInst->parameters ) ) { |
---|
878 | TypeExpr * expr = dynamic_cast< TypeExpr * >( std::get<1>(p) ); |
---|
879 | if ( ! expr ) { |
---|
880 | SemanticError( std::get<1>(p), "Expression parameters for trait instances are currently unsupported: " ); |
---|
881 | } |
---|
882 | if ( TypeInstType * inst = dynamic_cast< TypeInstType * >( expr->get_type() ) ) { |
---|
883 | TypeDecl * formalDecl = std::get<0>(p); |
---|
884 | TypeDecl * instDecl = inst->baseType; |
---|
885 | if ( formalDecl->get_sized() ) instDecl->set_sized( true ); |
---|
886 | } |
---|
887 | } |
---|
888 | // normalizeAssertions( traitInst->members ); |
---|
889 | } |
---|
890 | |
---|
891 | void LinkReferenceToTypes_old::postvisit( EnumDecl * enumDecl ) { |
---|
892 | // visit enum members first so that the types of self-referencing members are updated properly |
---|
893 | if ( enumDecl->body ) { |
---|
894 | ForwardEnumsType::iterator fwds = forwardEnums.find( enumDecl->name ); |
---|
895 | if ( fwds != forwardEnums.end() ) { |
---|
896 | for ( std::list< EnumInstType * >::iterator inst = fwds->second.begin(); inst != fwds->second.end(); ++inst ) { |
---|
897 | (* inst)->baseEnum = enumDecl; |
---|
898 | } // for |
---|
899 | forwardEnums.erase( fwds ); |
---|
900 | } // if |
---|
901 | } // if |
---|
902 | } |
---|
903 | |
---|
904 | void LinkReferenceToTypes_old::renameGenericParams( std::list< TypeDecl * > & params ) { |
---|
905 | // rename generic type parameters uniquely so that they do not conflict with user-defined function forall parameters, e.g. |
---|
906 | // forall(otype T) |
---|
907 | // struct Box { |
---|
908 | // T x; |
---|
909 | // }; |
---|
910 | // forall(otype T) |
---|
911 | // void f(Box(T) b) { |
---|
912 | // ... |
---|
913 | // } |
---|
914 | // The T in Box and the T in f are different, so internally the naming must reflect that. |
---|
915 | GuardValue( inGeneric ); |
---|
916 | inGeneric = ! params.empty(); |
---|
917 | for ( TypeDecl * td : params ) { |
---|
918 | td->name = "__" + td->name + "_generic_"; |
---|
919 | } |
---|
920 | } |
---|
921 | |
---|
922 | void LinkReferenceToTypes_old::previsit( StructDecl * structDecl ) { |
---|
923 | renameGenericParams( structDecl->parameters ); |
---|
924 | } |
---|
925 | |
---|
926 | void LinkReferenceToTypes_old::previsit( UnionDecl * unionDecl ) { |
---|
927 | renameGenericParams( unionDecl->parameters ); |
---|
928 | } |
---|
929 | |
---|
930 | void LinkReferenceToTypes_old::postvisit( StructDecl * structDecl ) { |
---|
931 | // visit struct members first so that the types of self-referencing members are updated properly |
---|
932 | // xxx - need to ensure that type parameters match up between forward declarations and definition (most importantly, number of type parameters and their defaults) |
---|
933 | if ( structDecl->body ) { |
---|
934 | ForwardStructsType::iterator fwds = forwardStructs.find( structDecl->name ); |
---|
935 | if ( fwds != forwardStructs.end() ) { |
---|
936 | for ( std::list< StructInstType * >::iterator inst = fwds->second.begin(); inst != fwds->second.end(); ++inst ) { |
---|
937 | (* inst)->baseStruct = structDecl; |
---|
938 | } // for |
---|
939 | forwardStructs.erase( fwds ); |
---|
940 | } // if |
---|
941 | } // if |
---|
942 | } |
---|
943 | |
---|
944 | void LinkReferenceToTypes_old::postvisit( UnionDecl * unionDecl ) { |
---|
945 | if ( unionDecl->body ) { |
---|
946 | ForwardUnionsType::iterator fwds = forwardUnions.find( unionDecl->name ); |
---|
947 | if ( fwds != forwardUnions.end() ) { |
---|
948 | for ( std::list< UnionInstType * >::iterator inst = fwds->second.begin(); inst != fwds->second.end(); ++inst ) { |
---|
949 | (* inst)->baseUnion = unionDecl; |
---|
950 | } // for |
---|
951 | forwardUnions.erase( fwds ); |
---|
952 | } // if |
---|
953 | } // if |
---|
954 | } |
---|
955 | |
---|
956 | void LinkReferenceToTypes_old::postvisit( TypeInstType * typeInst ) { |
---|
957 | // ensure generic parameter instances are renamed like the base type |
---|
958 | if ( inGeneric && typeInst->baseType ) typeInst->name = typeInst->baseType->name; |
---|
959 | if ( const NamedTypeDecl * namedTypeDecl = local_indexer->lookupType( typeInst->name ) ) { |
---|
960 | if ( const TypeDecl * typeDecl = dynamic_cast< const TypeDecl * >( namedTypeDecl ) ) { |
---|
961 | typeInst->set_isFtype( typeDecl->kind == TypeDecl::Ftype ); |
---|
962 | } // if |
---|
963 | } // if |
---|
964 | } |
---|
965 | |
---|
966 | ResolveEnumInitializers::ResolveEnumInitializers( const Indexer * other_indexer ) : WithIndexer( true ) { |
---|
967 | if ( other_indexer ) { |
---|
968 | local_indexer = other_indexer; |
---|
969 | } else { |
---|
970 | local_indexer = &indexer; |
---|
971 | } // if |
---|
972 | } |
---|
973 | |
---|
974 | void ResolveEnumInitializers::postvisit( EnumDecl * enumDecl ) { |
---|
975 | if ( enumDecl->body ) { |
---|
976 | for ( Declaration * member : enumDecl->members ) { |
---|
977 | ObjectDecl * field = strict_dynamic_cast<ObjectDecl *>( member ); |
---|
978 | if ( field->init ) { |
---|
979 | // need to resolve enumerator initializers early so that other passes that determine if an expression is constexpr have the appropriate information. |
---|
980 | SingleInit * init = strict_dynamic_cast<SingleInit *>( field->init ); |
---|
981 | if ( !enumDecl->base || dynamic_cast<BasicType *>(enumDecl->base)) |
---|
982 | ResolvExpr::findSingleExpression( init->value, new BasicType( Type::Qualifiers(), BasicType::SignedInt ), indexer ); |
---|
983 | else { |
---|
984 | if (dynamic_cast<PointerType *>(enumDecl->base)) { |
---|
985 | auto typePtr = dynamic_cast<PointerType *>(enumDecl->base); |
---|
986 | ResolvExpr::findSingleExpression( init->value, |
---|
987 | new PointerType( Type::Qualifiers(), typePtr->base ), indexer ); |
---|
988 | } else { |
---|
989 | ResolvExpr::findSingleExpression( init->value, new BasicType( Type::Qualifiers(), BasicType::SignedInt ), indexer ); |
---|
990 | } |
---|
991 | } |
---|
992 | |
---|
993 | } |
---|
994 | } |
---|
995 | |
---|
996 | } // if |
---|
997 | } |
---|
998 | |
---|
999 | /// Fix up assertions - flattens assertion lists, removing all trait instances |
---|
1000 | void forallFixer( std::list< TypeDecl * > & forall, BaseSyntaxNode * node ) { |
---|
1001 | for ( TypeDecl * type : forall ) { |
---|
1002 | std::list< DeclarationWithType * > asserts; |
---|
1003 | asserts.splice( asserts.end(), type->assertions ); |
---|
1004 | // expand trait instances into their members |
---|
1005 | for ( DeclarationWithType * assertion : asserts ) { |
---|
1006 | if ( TraitInstType * traitInst = dynamic_cast< TraitInstType * >( assertion->get_type() ) ) { |
---|
1007 | // expand trait instance into all of its members |
---|
1008 | expandAssertions( traitInst, back_inserter( type->assertions ) ); |
---|
1009 | delete traitInst; |
---|
1010 | } else { |
---|
1011 | // pass other assertions through |
---|
1012 | type->assertions.push_back( assertion ); |
---|
1013 | } // if |
---|
1014 | } // for |
---|
1015 | // apply FixFunction to every assertion to check for invalid void type |
---|
1016 | for ( DeclarationWithType *& assertion : type->assertions ) { |
---|
1017 | bool isVoid = fixFunction( assertion ); |
---|
1018 | if ( isVoid ) { |
---|
1019 | SemanticError( node, "invalid type void in assertion of function " ); |
---|
1020 | } // if |
---|
1021 | } // for |
---|
1022 | // normalizeAssertions( type->assertions ); |
---|
1023 | } // for |
---|
1024 | } |
---|
1025 | |
---|
1026 | /// Replace all traits in assertion lists with their assertions. |
---|
1027 | void expandTraits( std::list< TypeDecl * > & forall ) { |
---|
1028 | for ( TypeDecl * type : forall ) { |
---|
1029 | std::list< DeclarationWithType * > asserts; |
---|
1030 | asserts.splice( asserts.end(), type->assertions ); |
---|
1031 | // expand trait instances into their members |
---|
1032 | for ( DeclarationWithType * assertion : asserts ) { |
---|
1033 | if ( TraitInstType * traitInst = dynamic_cast< TraitInstType * >( assertion->get_type() ) ) { |
---|
1034 | // expand trait instance into all of its members |
---|
1035 | expandAssertions( traitInst, back_inserter( type->assertions ) ); |
---|
1036 | delete traitInst; |
---|
1037 | } else { |
---|
1038 | // pass other assertions through |
---|
1039 | type->assertions.push_back( assertion ); |
---|
1040 | } // if |
---|
1041 | } // for |
---|
1042 | } |
---|
1043 | } |
---|
1044 | |
---|
1045 | /// Fix each function in the assertion list and check for invalid void type. |
---|
1046 | void fixAssertions( |
---|
1047 | std::list< TypeDecl * > & forall, BaseSyntaxNode * node ) { |
---|
1048 | for ( TypeDecl * type : forall ) { |
---|
1049 | for ( DeclarationWithType *& assertion : type->assertions ) { |
---|
1050 | bool isVoid = fixFunction( assertion ); |
---|
1051 | if ( isVoid ) { |
---|
1052 | SemanticError( node, "invalid type void in assertion of function " ); |
---|
1053 | } // if |
---|
1054 | } // for |
---|
1055 | } |
---|
1056 | } |
---|
1057 | |
---|
1058 | void ForallPointerDecay_old::previsit( ObjectDecl * object ) { |
---|
1059 | // ensure that operator names only apply to functions or function pointers |
---|
1060 | if ( CodeGen::isOperator( object->name ) && ! dynamic_cast< FunctionType * >( object->type->stripDeclarator() ) ) { |
---|
1061 | SemanticError( object->location, toCString( "operator ", object->name.c_str(), " is not a function or function pointer." ) ); |
---|
1062 | } |
---|
1063 | object->fixUniqueId(); |
---|
1064 | } |
---|
1065 | |
---|
1066 | void ForallPointerDecay_old::previsit( FunctionDecl * func ) { |
---|
1067 | func->fixUniqueId(); |
---|
1068 | } |
---|
1069 | |
---|
1070 | void ForallPointerDecay_old::previsit( FunctionType * ftype ) { |
---|
1071 | forallFixer( ftype->forall, ftype ); |
---|
1072 | } |
---|
1073 | |
---|
1074 | void ForallPointerDecay_old::previsit( StructDecl * aggrDecl ) { |
---|
1075 | forallFixer( aggrDecl->parameters, aggrDecl ); |
---|
1076 | } |
---|
1077 | |
---|
1078 | void ForallPointerDecay_old::previsit( UnionDecl * aggrDecl ) { |
---|
1079 | forallFixer( aggrDecl->parameters, aggrDecl ); |
---|
1080 | } |
---|
1081 | |
---|
1082 | void TraitExpander_old::previsit( FunctionType * ftype ) { |
---|
1083 | expandTraits( ftype->forall ); |
---|
1084 | } |
---|
1085 | |
---|
1086 | void TraitExpander_old::previsit( StructDecl * aggrDecl ) { |
---|
1087 | expandTraits( aggrDecl->parameters ); |
---|
1088 | } |
---|
1089 | |
---|
1090 | void TraitExpander_old::previsit( UnionDecl * aggrDecl ) { |
---|
1091 | expandTraits( aggrDecl->parameters ); |
---|
1092 | } |
---|
1093 | |
---|
1094 | void AssertionFixer_old::previsit( FunctionType * ftype ) { |
---|
1095 | fixAssertions( ftype->forall, ftype ); |
---|
1096 | } |
---|
1097 | |
---|
1098 | void AssertionFixer_old::previsit( StructDecl * aggrDecl ) { |
---|
1099 | fixAssertions( aggrDecl->parameters, aggrDecl ); |
---|
1100 | } |
---|
1101 | |
---|
1102 | void AssertionFixer_old::previsit( UnionDecl * aggrDecl ) { |
---|
1103 | fixAssertions( aggrDecl->parameters, aggrDecl ); |
---|
1104 | } |
---|
1105 | |
---|
1106 | void CheckOperatorTypes_old::previsit( ObjectDecl * object ) { |
---|
1107 | // ensure that operator names only apply to functions or function pointers |
---|
1108 | if ( CodeGen::isOperator( object->name ) && ! dynamic_cast< FunctionType * >( object->type->stripDeclarator() ) ) { |
---|
1109 | SemanticError( object->location, toCString( "operator ", object->name.c_str(), " is not a function or function pointer." ) ); |
---|
1110 | } |
---|
1111 | } |
---|
1112 | |
---|
1113 | void FixUniqueIds_old::previsit( DeclarationWithType * decl ) { |
---|
1114 | decl->fixUniqueId(); |
---|
1115 | } |
---|
1116 | |
---|
1117 | void ReturnChecker::checkFunctionReturns( std::list< Declaration * > & translationUnit ) { |
---|
1118 | PassVisitor<ReturnChecker> checker; |
---|
1119 | acceptAll( translationUnit, checker ); |
---|
1120 | } |
---|
1121 | |
---|
1122 | void ReturnChecker::previsit( FunctionDecl * functionDecl ) { |
---|
1123 | GuardValue( returnVals ); |
---|
1124 | returnVals = functionDecl->get_functionType()->get_returnVals(); |
---|
1125 | } |
---|
1126 | |
---|
1127 | void ReturnChecker::previsit( ReturnStmt * returnStmt ) { |
---|
1128 | // Previously this also checked for the existence of an expr paired with no return values on |
---|
1129 | // the function return type. This is incorrect, since you can have an expression attached to |
---|
1130 | // a return statement in a void-returning function in C. The expression is treated as if it |
---|
1131 | // were cast to void. |
---|
1132 | if ( ! returnStmt->get_expr() && returnVals.size() != 0 ) { |
---|
1133 | SemanticError( returnStmt, "Non-void function returns no values: " ); |
---|
1134 | } |
---|
1135 | } |
---|
1136 | |
---|
1137 | |
---|
1138 | void ReplaceTypedef::replaceTypedef( std::list< Declaration * > &translationUnit ) { |
---|
1139 | PassVisitor<ReplaceTypedef> eliminator; |
---|
1140 | mutateAll( translationUnit, eliminator ); |
---|
1141 | if ( eliminator.pass.typedefNames.count( "size_t" ) ) { |
---|
1142 | // grab and remember declaration of size_t |
---|
1143 | Validate::SizeType = eliminator.pass.typedefNames["size_t"].first->base->clone(); |
---|
1144 | } else { |
---|
1145 | // xxx - missing global typedef for size_t - default to long unsigned int, even though that may be wrong |
---|
1146 | // eventually should have a warning for this case. |
---|
1147 | Validate::SizeType = new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt ); |
---|
1148 | } |
---|
1149 | } |
---|
1150 | |
---|
1151 | void ReplaceTypedef::premutate( QualifiedType * ) { |
---|
1152 | visit_children = false; |
---|
1153 | } |
---|
1154 | |
---|
1155 | Type * ReplaceTypedef::postmutate( QualifiedType * qualType ) { |
---|
1156 | // replacing typedefs only makes sense for the 'oldest ancestor' of the qualified type |
---|
1157 | qualType->parent = qualType->parent->acceptMutator( * visitor ); |
---|
1158 | return qualType; |
---|
1159 | } |
---|
1160 | |
---|
1161 | static bool isNonParameterAttribute( Attribute * attr ) { |
---|
1162 | static const std::vector<std::string> bad_names = { |
---|
1163 | "aligned", "__aligned__", |
---|
1164 | }; |
---|
1165 | for ( auto name : bad_names ) { |
---|
1166 | if ( name == attr->name ) { |
---|
1167 | return true; |
---|
1168 | } |
---|
1169 | } |
---|
1170 | return false; |
---|
1171 | } |
---|
1172 | |
---|
1173 | Type * ReplaceTypedef::postmutate( TypeInstType * typeInst ) { |
---|
1174 | // instances of typedef types will come here. If it is an instance |
---|
1175 | // of a typdef type, link the instance to its actual type. |
---|
1176 | TypedefMap::const_iterator def = typedefNames.find( typeInst->name ); |
---|
1177 | if ( def != typedefNames.end() ) { |
---|
1178 | Type * ret = def->second.first->base->clone(); |
---|
1179 | ret->location = typeInst->location; |
---|
1180 | ret->get_qualifiers() |= typeInst->get_qualifiers(); |
---|
1181 | // GCC ignores certain attributes if they arrive by typedef, this mimics that. |
---|
1182 | if ( inFunctionType ) { |
---|
1183 | ret->attributes.remove_if( isNonParameterAttribute ); |
---|
1184 | } |
---|
1185 | ret->attributes.splice( ret->attributes.end(), typeInst->attributes ); |
---|
1186 | // place instance parameters on the typedef'd type |
---|
1187 | if ( ! typeInst->parameters.empty() ) { |
---|
1188 | ReferenceToType * rtt = dynamic_cast<ReferenceToType *>(ret); |
---|
1189 | if ( ! rtt ) { |
---|
1190 | SemanticError( typeInst->location, "Cannot apply type parameters to base type of " + typeInst->name ); |
---|
1191 | } |
---|
1192 | rtt->parameters.clear(); |
---|
1193 | cloneAll( typeInst->parameters, rtt->parameters ); |
---|
1194 | mutateAll( rtt->parameters, * visitor ); // recursively fix typedefs on parameters |
---|
1195 | } // if |
---|
1196 | delete typeInst; |
---|
1197 | return ret; |
---|
1198 | } else { |
---|
1199 | TypeDeclMap::const_iterator base = typedeclNames.find( typeInst->name ); |
---|
1200 | if ( base == typedeclNames.end() ) { |
---|
1201 | SemanticError( typeInst->location, toString("Use of undefined type ", typeInst->name) ); |
---|
1202 | } |
---|
1203 | typeInst->set_baseType( base->second ); |
---|
1204 | return typeInst; |
---|
1205 | } // if |
---|
1206 | assert( false ); |
---|
1207 | } |
---|
1208 | |
---|
1209 | struct VarLenChecker : WithShortCircuiting { |
---|
1210 | void previsit( FunctionType * ) { visit_children = false; } |
---|
1211 | void previsit( ArrayType * at ) { |
---|
1212 | isVarLen |= at->isVarLen; |
---|
1213 | } |
---|
1214 | bool isVarLen = false; |
---|
1215 | }; |
---|
1216 | |
---|
1217 | bool isVariableLength( Type * t ) { |
---|
1218 | PassVisitor<VarLenChecker> varLenChecker; |
---|
1219 | maybeAccept( t, varLenChecker ); |
---|
1220 | return varLenChecker.pass.isVarLen; |
---|
1221 | } |
---|
1222 | |
---|
1223 | Declaration * ReplaceTypedef::postmutate( TypedefDecl * tyDecl ) { |
---|
1224 | if ( typedefNames.count( tyDecl->name ) == 1 && typedefNames[ tyDecl->name ].second == scopeLevel ) { |
---|
1225 | // typedef to the same name from the same scope |
---|
1226 | // must be from the same type |
---|
1227 | |
---|
1228 | Type * t1 = tyDecl->base; |
---|
1229 | Type * t2 = typedefNames[ tyDecl->name ].first->base; |
---|
1230 | if ( ! ResolvExpr::typesCompatible( t1, t2, Indexer() ) ) { |
---|
1231 | SemanticError( tyDecl->location, "Cannot redefine typedef: " + tyDecl->name ); |
---|
1232 | } |
---|
1233 | // Cannot redefine VLA typedefs. Note: this is slightly incorrect, because our notion of VLAs |
---|
1234 | // at this point in the translator is imprecise. In particular, this will disallow redefining typedefs |
---|
1235 | // with arrays whose dimension is an enumerator or a cast of a constant/enumerator. The effort required |
---|
1236 | // to fix this corner case likely outweighs the utility of allowing it. |
---|
1237 | if ( isVariableLength( t1 ) || isVariableLength( t2 ) ) { |
---|
1238 | SemanticError( tyDecl->location, "Cannot redefine typedef: " + tyDecl->name ); |
---|
1239 | } |
---|
1240 | } else { |
---|
1241 | typedefNames[ tyDecl->name ] = std::make_pair( TypedefDeclPtr( tyDecl ), scopeLevel ); |
---|
1242 | } // if |
---|
1243 | |
---|
1244 | // When a typedef is a forward declaration: |
---|
1245 | // typedef struct screen SCREEN; |
---|
1246 | // the declaration portion must be retained: |
---|
1247 | // struct screen; |
---|
1248 | // because the expansion of the typedef is: |
---|
1249 | // void rtn( SCREEN * p ) => void rtn( struct screen * p ) |
---|
1250 | // hence the type-name "screen" must be defined. |
---|
1251 | // Note, qualifiers on the typedef are superfluous for the forward declaration. |
---|
1252 | |
---|
1253 | Type * designatorType = tyDecl->base->stripDeclarator(); |
---|
1254 | if ( StructInstType * aggDecl = dynamic_cast< StructInstType * >( designatorType ) ) { |
---|
1255 | declsToAddBefore.push_back( new StructDecl( aggDecl->name, AggregateDecl::Struct, noAttributes, tyDecl->linkage ) ); |
---|
1256 | } else if ( UnionInstType * aggDecl = dynamic_cast< UnionInstType * >( designatorType ) ) { |
---|
1257 | declsToAddBefore.push_back( new UnionDecl( aggDecl->name, noAttributes, tyDecl->linkage ) ); |
---|
1258 | } else if ( EnumInstType * enumDecl = dynamic_cast< EnumInstType * >( designatorType ) ) { |
---|
1259 | // declsToAddBefore.push_back( new EnumDecl( enumDecl->name, noAttributes, tyDecl->linkage, enumDecl->baseEnum->base ) ); |
---|
1260 | if (enumDecl->baseEnum) { |
---|
1261 | declsToAddBefore.push_back( new EnumDecl( enumDecl->name, noAttributes, tyDecl->linkage, enumDecl->baseEnum->base ) ); |
---|
1262 | } else { |
---|
1263 | declsToAddBefore.push_back( new EnumDecl( enumDecl->name, noAttributes, tyDecl->linkage ) ); |
---|
1264 | } |
---|
1265 | } // if |
---|
1266 | return tyDecl->clone(); |
---|
1267 | } |
---|
1268 | |
---|
1269 | void ReplaceTypedef::premutate( TypeDecl * typeDecl ) { |
---|
1270 | TypedefMap::iterator i = typedefNames.find( typeDecl->name ); |
---|
1271 | if ( i != typedefNames.end() ) { |
---|
1272 | typedefNames.erase( i ) ; |
---|
1273 | } // if |
---|
1274 | |
---|
1275 | typedeclNames.insert( typeDecl->name, typeDecl ); |
---|
1276 | } |
---|
1277 | |
---|
1278 | void ReplaceTypedef::premutate( FunctionDecl * ) { |
---|
1279 | GuardScope( typedefNames ); |
---|
1280 | GuardScope( typedeclNames ); |
---|
1281 | } |
---|
1282 | |
---|
1283 | void ReplaceTypedef::premutate( ObjectDecl * ) { |
---|
1284 | GuardScope( typedefNames ); |
---|
1285 | GuardScope( typedeclNames ); |
---|
1286 | } |
---|
1287 | |
---|
1288 | DeclarationWithType * ReplaceTypedef::postmutate( ObjectDecl * objDecl ) { |
---|
1289 | if ( FunctionType * funtype = dynamic_cast<FunctionType *>( objDecl->type ) ) { // function type? |
---|
1290 | // replace the current object declaration with a function declaration |
---|
1291 | FunctionDecl * newDecl = new FunctionDecl( objDecl->name, objDecl->get_storageClasses(), objDecl->linkage, funtype, 0, objDecl->attributes, objDecl->get_funcSpec() ); |
---|
1292 | objDecl->attributes.clear(); |
---|
1293 | objDecl->set_type( nullptr ); |
---|
1294 | delete objDecl; |
---|
1295 | return newDecl; |
---|
1296 | } // if |
---|
1297 | return objDecl; |
---|
1298 | } |
---|
1299 | |
---|
1300 | void ReplaceTypedef::premutate( CastExpr * ) { |
---|
1301 | GuardScope( typedefNames ); |
---|
1302 | GuardScope( typedeclNames ); |
---|
1303 | } |
---|
1304 | |
---|
1305 | void ReplaceTypedef::premutate( CompoundStmt * ) { |
---|
1306 | GuardScope( typedefNames ); |
---|
1307 | GuardScope( typedeclNames ); |
---|
1308 | scopeLevel += 1; |
---|
1309 | GuardAction( [this](){ scopeLevel -= 1; } ); |
---|
1310 | } |
---|
1311 | |
---|
1312 | template<typename AggDecl> |
---|
1313 | void ReplaceTypedef::addImplicitTypedef( AggDecl * aggDecl ) { |
---|
1314 | if ( typedefNames.count( aggDecl->get_name() ) == 0 ) { |
---|
1315 | Type * type = nullptr; |
---|
1316 | if ( StructDecl * newDeclStructDecl = dynamic_cast< StructDecl * >( aggDecl ) ) { |
---|
1317 | type = new StructInstType( Type::Qualifiers(), newDeclStructDecl->get_name() ); |
---|
1318 | } else if ( UnionDecl * newDeclUnionDecl = dynamic_cast< UnionDecl * >( aggDecl ) ) { |
---|
1319 | type = new UnionInstType( Type::Qualifiers(), newDeclUnionDecl->get_name() ); |
---|
1320 | } else if ( EnumDecl * newDeclEnumDecl = dynamic_cast< EnumDecl * >( aggDecl ) ) { |
---|
1321 | type = new EnumInstType( Type::Qualifiers(), newDeclEnumDecl->get_name() ); |
---|
1322 | } // if |
---|
1323 | TypedefDeclPtr tyDecl( new TypedefDecl( aggDecl->get_name(), aggDecl->location, Type::StorageClasses(), type, aggDecl->get_linkage() ) ); |
---|
1324 | typedefNames[ aggDecl->get_name() ] = std::make_pair( std::move( tyDecl ), scopeLevel ); |
---|
1325 | // add the implicit typedef to the AST |
---|
1326 | declsToAddBefore.push_back( new TypedefDecl( aggDecl->get_name(), aggDecl->location, Type::StorageClasses(), type->clone(), aggDecl->get_linkage() ) ); |
---|
1327 | } // if |
---|
1328 | } |
---|
1329 | |
---|
1330 | template< typename AggDecl > |
---|
1331 | void ReplaceTypedef::handleAggregate( AggDecl * aggr ) { |
---|
1332 | SemanticErrorException errors; |
---|
1333 | |
---|
1334 | ValueGuard< std::list<Declaration * > > oldBeforeDecls( declsToAddBefore ); |
---|
1335 | ValueGuard< std::list<Declaration * > > oldAfterDecls ( declsToAddAfter ); |
---|
1336 | declsToAddBefore.clear(); |
---|
1337 | declsToAddAfter.clear(); |
---|
1338 | |
---|
1339 | GuardScope( typedefNames ); |
---|
1340 | GuardScope( typedeclNames ); |
---|
1341 | mutateAll( aggr->parameters, * visitor ); |
---|
1342 | mutateAll( aggr->attributes, * visitor ); |
---|
1343 | |
---|
1344 | // unroll mutateAll for aggr->members so that implicit typedefs for nested types are added to the aggregate body. |
---|
1345 | for ( std::list< Declaration * >::iterator i = aggr->members.begin(); i != aggr->members.end(); ++i ) { |
---|
1346 | if ( !declsToAddAfter.empty() ) { aggr->members.splice( i, declsToAddAfter ); } |
---|
1347 | |
---|
1348 | try { |
---|
1349 | * i = maybeMutate( * i, * visitor ); |
---|
1350 | } catch ( SemanticErrorException &e ) { |
---|
1351 | errors.append( e ); |
---|
1352 | } |
---|
1353 | |
---|
1354 | if ( !declsToAddBefore.empty() ) { aggr->members.splice( i, declsToAddBefore ); } |
---|
1355 | } |
---|
1356 | |
---|
1357 | if ( !declsToAddAfter.empty() ) { aggr->members.splice( aggr->members.end(), declsToAddAfter ); } |
---|
1358 | if ( !errors.isEmpty() ) { throw errors; } |
---|
1359 | } |
---|
1360 | |
---|
1361 | void ReplaceTypedef::premutate( StructDecl * structDecl ) { |
---|
1362 | visit_children = false; |
---|
1363 | addImplicitTypedef( structDecl ); |
---|
1364 | handleAggregate( structDecl ); |
---|
1365 | } |
---|
1366 | |
---|
1367 | void ReplaceTypedef::premutate( UnionDecl * unionDecl ) { |
---|
1368 | visit_children = false; |
---|
1369 | addImplicitTypedef( unionDecl ); |
---|
1370 | handleAggregate( unionDecl ); |
---|
1371 | } |
---|
1372 | |
---|
1373 | void ReplaceTypedef::premutate( EnumDecl * enumDecl ) { |
---|
1374 | addImplicitTypedef( enumDecl ); |
---|
1375 | } |
---|
1376 | |
---|
1377 | void ReplaceTypedef::premutate( FunctionType * ) { |
---|
1378 | GuardValue( inFunctionType ); |
---|
1379 | inFunctionType = true; |
---|
1380 | } |
---|
1381 | |
---|
1382 | void ReplaceTypedef::premutate( TraitDecl * ) { |
---|
1383 | GuardScope( typedefNames ); |
---|
1384 | GuardScope( typedeclNames); |
---|
1385 | } |
---|
1386 | |
---|
1387 | void VerifyCtorDtorAssign::verify( std::list< Declaration * > & translationUnit ) { |
---|
1388 | PassVisitor<VerifyCtorDtorAssign> verifier; |
---|
1389 | acceptAll( translationUnit, verifier ); |
---|
1390 | } |
---|
1391 | |
---|
1392 | void VerifyCtorDtorAssign::previsit( FunctionDecl * funcDecl ) { |
---|
1393 | FunctionType * funcType = funcDecl->get_functionType(); |
---|
1394 | std::list< DeclarationWithType * > &returnVals = funcType->get_returnVals(); |
---|
1395 | std::list< DeclarationWithType * > ¶ms = funcType->get_parameters(); |
---|
1396 | |
---|
1397 | if ( CodeGen::isCtorDtorAssign( funcDecl->get_name() ) ) { // TODO: also check /=, etc. |
---|
1398 | if ( params.size() == 0 ) { |
---|
1399 | SemanticError( funcDecl->location, "Constructors, destructors, and assignment functions require at least one parameter." ); |
---|
1400 | } |
---|
1401 | ReferenceType * refType = dynamic_cast< ReferenceType * >( params.front()->get_type() ); |
---|
1402 | if ( ! refType ) { |
---|
1403 | SemanticError( funcDecl->location, "First parameter of a constructor, destructor, or assignment function must be a reference." ); |
---|
1404 | } |
---|
1405 | if ( CodeGen::isCtorDtor( funcDecl->get_name() ) && returnVals.size() != 0 ) { |
---|
1406 | if(!returnVals.front()->get_type()->isVoid()) { |
---|
1407 | SemanticError( funcDecl->location, "Constructors and destructors cannot have explicit return values." ); |
---|
1408 | } |
---|
1409 | } |
---|
1410 | } |
---|
1411 | } |
---|
1412 | |
---|
1413 | // Test for special name on a generic parameter. Special treatment for the |
---|
1414 | // special name is a bootstrapping hack. In most cases, the worlds of T's |
---|
1415 | // and of N's don't overlap (normal treamtemt). The foundations in |
---|
1416 | // array.hfa use tagging for both types and dimensions. Tagging treats |
---|
1417 | // its subject parameter even more opaquely than T&, which assumes it is |
---|
1418 | // possible to have a pointer/reference to such an object. Tagging only |
---|
1419 | // seeks to identify the type-system resident at compile time. Both N's |
---|
1420 | // and T's can make tags. The tag definition uses the special name, which |
---|
1421 | // is treated as "an N or a T." This feature is not inteded to be used |
---|
1422 | // outside of the definition and immediate uses of a tag. |
---|
1423 | static inline bool isReservedTysysIdOnlyName( const std::string & name ) { |
---|
1424 | // name's prefix was __CFA_tysys_id_only, before it got wrapped in __..._generic |
---|
1425 | int foundAt = name.find("__CFA_tysys_id_only"); |
---|
1426 | if (foundAt == 0) return true; |
---|
1427 | if (foundAt == 2 && name[0] == '_' && name[1] == '_') return true; |
---|
1428 | return false; |
---|
1429 | } |
---|
1430 | |
---|
1431 | template< typename Aggr > |
---|
1432 | void validateGeneric( Aggr * inst ) { |
---|
1433 | std::list< TypeDecl * > * params = inst->get_baseParameters(); |
---|
1434 | if ( params ) { |
---|
1435 | std::list< Expression * > & args = inst->get_parameters(); |
---|
1436 | |
---|
1437 | // insert defaults arguments when a type argument is missing (currently only supports missing arguments at the end of the list). |
---|
1438 | // A substitution is used to ensure that defaults are replaced correctly, e.g., |
---|
1439 | // forall(otype T, otype alloc = heap_allocator(T)) struct vector; |
---|
1440 | // vector(int) v; |
---|
1441 | // after insertion of default values becomes |
---|
1442 | // vector(int, heap_allocator(T)) |
---|
1443 | // and the substitution is built with T=int so that after substitution, the result is |
---|
1444 | // vector(int, heap_allocator(int)) |
---|
1445 | TypeSubstitution sub; |
---|
1446 | auto paramIter = params->begin(); |
---|
1447 | auto argIter = args.begin(); |
---|
1448 | for ( ; paramIter != params->end(); ++paramIter, ++argIter ) { |
---|
1449 | if ( argIter != args.end() ) { |
---|
1450 | TypeExpr * expr = dynamic_cast< TypeExpr * >( * argIter ); |
---|
1451 | if ( expr ) { |
---|
1452 | sub.add( (* paramIter)->get_name(), expr->get_type()->clone() ); |
---|
1453 | } |
---|
1454 | } else { |
---|
1455 | Type * defaultType = (* paramIter)->get_init(); |
---|
1456 | if ( defaultType ) { |
---|
1457 | args.push_back( new TypeExpr( defaultType->clone() ) ); |
---|
1458 | sub.add( (* paramIter)->get_name(), defaultType->clone() ); |
---|
1459 | argIter = std::prev(args.end()); |
---|
1460 | } else { |
---|
1461 | SemanticError( inst, "Too few type arguments in generic type " ); |
---|
1462 | } |
---|
1463 | } |
---|
1464 | assert( argIter != args.end() ); |
---|
1465 | bool typeParamDeclared = (*paramIter)->kind != TypeDecl::Kind::Dimension; |
---|
1466 | bool typeArgGiven; |
---|
1467 | if ( isReservedTysysIdOnlyName( (*paramIter)->name ) ) { |
---|
1468 | // coerce a match when declaration is reserved name, which means "either" |
---|
1469 | typeArgGiven = typeParamDeclared; |
---|
1470 | } else { |
---|
1471 | typeArgGiven = dynamic_cast< TypeExpr * >( * argIter ); |
---|
1472 | } |
---|
1473 | if ( ! typeParamDeclared && typeArgGiven ) SemanticError( inst, "Type argument given for value parameter: " ); |
---|
1474 | if ( typeParamDeclared && ! typeArgGiven ) SemanticError( inst, "Expression argument given for type parameter: " ); |
---|
1475 | } |
---|
1476 | |
---|
1477 | sub.apply( inst ); |
---|
1478 | if ( args.size() > params->size() ) SemanticError( inst, "Too many type arguments in generic type " ); |
---|
1479 | } |
---|
1480 | } |
---|
1481 | |
---|
1482 | void ValidateGenericParameters::previsit( StructInstType * inst ) { |
---|
1483 | validateGeneric( inst ); |
---|
1484 | } |
---|
1485 | |
---|
1486 | void ValidateGenericParameters::previsit( UnionInstType * inst ) { |
---|
1487 | validateGeneric( inst ); |
---|
1488 | } |
---|
1489 | |
---|
1490 | void TranslateDimensionGenericParameters::translateDimensions( std::list< Declaration * > &translationUnit ) { |
---|
1491 | PassVisitor<TranslateDimensionGenericParameters> translator; |
---|
1492 | mutateAll( translationUnit, translator ); |
---|
1493 | } |
---|
1494 | |
---|
1495 | TranslateDimensionGenericParameters::TranslateDimensionGenericParameters() : WithIndexer( false ) {} |
---|
1496 | |
---|
1497 | // Declaration of type variable: forall( [N] ) -> forall( N & | sized( N ) ) |
---|
1498 | TypeDecl * TranslateDimensionGenericParameters::postmutate( TypeDecl * td ) { |
---|
1499 | if ( td->kind == TypeDecl::Dimension ) { |
---|
1500 | td->kind = TypeDecl::Dtype; |
---|
1501 | if ( ! isReservedTysysIdOnlyName( td->name ) ) { |
---|
1502 | td->sized = true; |
---|
1503 | } |
---|
1504 | } |
---|
1505 | return td; |
---|
1506 | } |
---|
1507 | |
---|
1508 | // Situational awareness: |
---|
1509 | // array( float, [[currentExpr]] ) has visitingChildOfSUIT == true |
---|
1510 | // array( float, [[currentExpr]] - 1 ) has visitingChildOfSUIT == false |
---|
1511 | // size_t x = [[currentExpr]] has visitingChildOfSUIT == false |
---|
1512 | void TranslateDimensionGenericParameters::changeState_ChildOfSUIT( bool newVal ) { |
---|
1513 | GuardValue( nextVisitedNodeIsChildOfSUIT ); |
---|
1514 | GuardValue( visitingChildOfSUIT ); |
---|
1515 | visitingChildOfSUIT = nextVisitedNodeIsChildOfSUIT; |
---|
1516 | nextVisitedNodeIsChildOfSUIT = newVal; |
---|
1517 | } |
---|
1518 | void TranslateDimensionGenericParameters::premutate( StructInstType * sit ) { |
---|
1519 | (void) sit; |
---|
1520 | changeState_ChildOfSUIT(true); |
---|
1521 | } |
---|
1522 | void TranslateDimensionGenericParameters::premutate( UnionInstType * uit ) { |
---|
1523 | (void) uit; |
---|
1524 | changeState_ChildOfSUIT(true); |
---|
1525 | } |
---|
1526 | void TranslateDimensionGenericParameters::premutate( BaseSyntaxNode * node ) { |
---|
1527 | (void) node; |
---|
1528 | changeState_ChildOfSUIT(false); |
---|
1529 | } |
---|
1530 | |
---|
1531 | // Passing values as dimension arguments: array( float, 7 ) -> array( float, char[ 7 ] ) |
---|
1532 | // Consuming dimension parameters: size_t x = N - 1 ; -> size_t x = sizeof(N) - 1 ; |
---|
1533 | // Intertwined reality: array( float, N ) -> array( float, N ) |
---|
1534 | // array( float, N - 1 ) -> array( float, char[ sizeof(N) - 1 ] ) |
---|
1535 | // Intertwined case 1 is not just an optimization. |
---|
1536 | // Avoiding char[sizeof(-)] is necessary to enable the call of f to bind the value of N, in: |
---|
1537 | // forall([N]) void f( array(float, N) & ); |
---|
1538 | // array(float, 7) a; |
---|
1539 | // f(a); |
---|
1540 | |
---|
1541 | Expression * TranslateDimensionGenericParameters::postmutate( DimensionExpr * de ) { |
---|
1542 | // Expression de is an occurrence of N in LHS of above examples. |
---|
1543 | // Look up the name that de references. |
---|
1544 | // If we are in a struct body, then this reference can be to an entry of the stuct's forall list. |
---|
1545 | // Whether or not we are in a struct body, this reference can be to an entry of a containing function's forall list. |
---|
1546 | // If we are in a struct body, then the stuct's forall declarations are innermost (functions don't occur in structs). |
---|
1547 | // Thus, a potential struct's declaration is highest priority. |
---|
1548 | // A struct's forall declarations are already renamed with _generic_ suffix. Try that name variant first. |
---|
1549 | |
---|
1550 | std::string useName = "__" + de->name + "_generic_"; |
---|
1551 | TypeDecl * namedParamDecl = const_cast<TypeDecl *>( strict_dynamic_cast<const TypeDecl *, nullptr >( indexer.lookupType( useName ) ) ); |
---|
1552 | |
---|
1553 | if ( ! namedParamDecl ) { |
---|
1554 | useName = de->name; |
---|
1555 | namedParamDecl = const_cast<TypeDecl *>( strict_dynamic_cast<const TypeDecl *, nullptr >( indexer.lookupType( useName ) ) ); |
---|
1556 | } |
---|
1557 | |
---|
1558 | // Expect to find it always. A misspelled name would have been parsed as an identifier. |
---|
1559 | assert( namedParamDecl && "Type-system-managed value name not found in symbol table" ); |
---|
1560 | |
---|
1561 | delete de; |
---|
1562 | |
---|
1563 | TypeInstType * refToDecl = new TypeInstType( 0, useName, namedParamDecl ); |
---|
1564 | |
---|
1565 | if ( visitingChildOfSUIT ) { |
---|
1566 | // As in postmutate( Expression * ), topmost expression needs a TypeExpr wrapper |
---|
1567 | // But avoid ArrayType-Sizeof |
---|
1568 | return new TypeExpr( refToDecl ); |
---|
1569 | } else { |
---|
1570 | // the N occurrence is being used directly as a runtime value, |
---|
1571 | // if we are in a type instantiation, then the N is within a bigger value computation |
---|
1572 | return new SizeofExpr( refToDecl ); |
---|
1573 | } |
---|
1574 | } |
---|
1575 | |
---|
1576 | Expression * TranslateDimensionGenericParameters::postmutate( Expression * e ) { |
---|
1577 | if ( visitingChildOfSUIT ) { |
---|
1578 | // e is an expression used as an argument to instantiate a type |
---|
1579 | if (! dynamic_cast< TypeExpr * >( e ) ) { |
---|
1580 | // e is a value expression |
---|
1581 | // but not a DimensionExpr, which has a distinct postmutate |
---|
1582 | Type * typeExprContent = new ArrayType( 0, new BasicType( 0, BasicType::Char ), e, true, false ); |
---|
1583 | TypeExpr * result = new TypeExpr( typeExprContent ); |
---|
1584 | return result; |
---|
1585 | } |
---|
1586 | } |
---|
1587 | return e; |
---|
1588 | } |
---|
1589 | |
---|
1590 | void CompoundLiteral::premutate( ObjectDecl * objectDecl ) { |
---|
1591 | storageClasses = objectDecl->get_storageClasses(); |
---|
1592 | } |
---|
1593 | |
---|
1594 | Expression * CompoundLiteral::postmutate( CompoundLiteralExpr * compLitExpr ) { |
---|
1595 | // transform [storage_class] ... (struct S){ 3, ... }; |
---|
1596 | // into [storage_class] struct S temp = { 3, ... }; |
---|
1597 | static UniqueName indexName( "_compLit" ); |
---|
1598 | |
---|
1599 | ObjectDecl * tempvar = new ObjectDecl( indexName.newName(), storageClasses, LinkageSpec::C, nullptr, compLitExpr->get_result(), compLitExpr->get_initializer() ); |
---|
1600 | compLitExpr->set_result( nullptr ); |
---|
1601 | compLitExpr->set_initializer( nullptr ); |
---|
1602 | delete compLitExpr; |
---|
1603 | declsToAddBefore.push_back( tempvar ); // add modified temporary to current block |
---|
1604 | return new VariableExpr( tempvar ); |
---|
1605 | } |
---|
1606 | |
---|
1607 | void ReturnTypeFixer::fix( std::list< Declaration * > &translationUnit ) { |
---|
1608 | PassVisitor<ReturnTypeFixer> fixer; |
---|
1609 | acceptAll( translationUnit, fixer ); |
---|
1610 | } |
---|
1611 | |
---|
1612 | void ReturnTypeFixer::postvisit( FunctionDecl * functionDecl ) { |
---|
1613 | FunctionType * ftype = functionDecl->get_functionType(); |
---|
1614 | std::list< DeclarationWithType * > & retVals = ftype->get_returnVals(); |
---|
1615 | assertf( retVals.size() == 0 || retVals.size() == 1, "Function %s has too many return values: %zu", functionDecl->get_name().c_str(), retVals.size() ); |
---|
1616 | if ( retVals.size() == 1 ) { |
---|
1617 | // ensure all function return values have a name - use the name of the function to disambiguate (this also provides a nice bit of help for debugging). |
---|
1618 | // ensure other return values have a name. |
---|
1619 | DeclarationWithType * ret = retVals.front(); |
---|
1620 | if ( ret->get_name() == "" ) { |
---|
1621 | ret->set_name( toString( "_retval_", CodeGen::genName( functionDecl ) ) ); |
---|
1622 | } |
---|
1623 | ret->get_attributes().push_back( new Attribute( "unused" ) ); |
---|
1624 | } |
---|
1625 | } |
---|
1626 | |
---|
1627 | void ReturnTypeFixer::postvisit( FunctionType * ftype ) { |
---|
1628 | // xxx - need to handle named return values - this information needs to be saved somehow |
---|
1629 | // so that resolution has access to the names. |
---|
1630 | // Note that this pass needs to happen early so that other passes which look for tuple types |
---|
1631 | // find them in all of the right places, including function return types. |
---|
1632 | std::list< DeclarationWithType * > & retVals = ftype->get_returnVals(); |
---|
1633 | if ( retVals.size() > 1 ) { |
---|
1634 | // generate a single return parameter which is the tuple of all of the return values |
---|
1635 | TupleType * tupleType = strict_dynamic_cast< TupleType * >( ResolvExpr::extractResultType( ftype ) ); |
---|
1636 | // ensure return value is not destructed by explicitly creating an empty ListInit node wherein maybeConstruct is false. |
---|
1637 | ObjectDecl * newRet = new ObjectDecl( "", Type::StorageClasses(), LinkageSpec::Cforall, 0, tupleType, new ListInit( std::list<Initializer *>(), noDesignators, false ) ); |
---|
1638 | deleteAll( retVals ); |
---|
1639 | retVals.clear(); |
---|
1640 | retVals.push_back( newRet ); |
---|
1641 | } |
---|
1642 | } |
---|
1643 | |
---|
1644 | void FixObjectType::fix( std::list< Declaration * > & translationUnit ) { |
---|
1645 | PassVisitor<FixObjectType> fixer; |
---|
1646 | acceptAll( translationUnit, fixer ); |
---|
1647 | } |
---|
1648 | |
---|
1649 | void FixObjectType::previsit( ObjectDecl * objDecl ) { |
---|
1650 | Type * new_type = ResolvExpr::resolveTypeof( objDecl->get_type(), indexer ); |
---|
1651 | objDecl->set_type( new_type ); |
---|
1652 | } |
---|
1653 | |
---|
1654 | void FixObjectType::previsit( FunctionDecl * funcDecl ) { |
---|
1655 | Type * new_type = ResolvExpr::resolveTypeof( funcDecl->type, indexer ); |
---|
1656 | funcDecl->set_type( new_type ); |
---|
1657 | } |
---|
1658 | |
---|
1659 | void FixObjectType::previsit( TypeDecl * typeDecl ) { |
---|
1660 | if ( typeDecl->get_base() ) { |
---|
1661 | Type * new_type = ResolvExpr::resolveTypeof( typeDecl->get_base(), indexer ); |
---|
1662 | typeDecl->set_base( new_type ); |
---|
1663 | } // if |
---|
1664 | } |
---|
1665 | |
---|
1666 | void InitializerLength::computeLength( std::list< Declaration * > & translationUnit ) { |
---|
1667 | PassVisitor<InitializerLength> len; |
---|
1668 | acceptAll( translationUnit, len ); |
---|
1669 | } |
---|
1670 | |
---|
1671 | void ArrayLength::computeLength( std::list< Declaration * > & translationUnit ) { |
---|
1672 | PassVisitor<ArrayLength> len; |
---|
1673 | acceptAll( translationUnit, len ); |
---|
1674 | } |
---|
1675 | |
---|
1676 | void InitializerLength::previsit( ObjectDecl * objDecl ) { |
---|
1677 | if ( ArrayType * at = dynamic_cast< ArrayType * >( objDecl->type ) ) { |
---|
1678 | if ( at->dimension ) return; |
---|
1679 | if ( ListInit * init = dynamic_cast< ListInit * >( objDecl->init ) ) { |
---|
1680 | at->dimension = new ConstantExpr( Constant::from_ulong( init->initializers.size() ) ); |
---|
1681 | } |
---|
1682 | } |
---|
1683 | } |
---|
1684 | |
---|
1685 | void ArrayLength::previsit( ArrayType * type ) { |
---|
1686 | if ( type->dimension ) { |
---|
1687 | // need to resolve array dimensions early so that constructor code can correctly determine |
---|
1688 | // if a type is a VLA (and hence whether its elements need to be constructed) |
---|
1689 | ResolvExpr::findSingleExpression( type->dimension, Validate::SizeType->clone(), indexer ); |
---|
1690 | |
---|
1691 | // must re-evaluate whether a type is a VLA, now that more information is available |
---|
1692 | // (e.g. the dimension may have been an enumerator, which was unknown prior to this step) |
---|
1693 | type->isVarLen = ! InitTweak::isConstExpr( type->dimension ); |
---|
1694 | } |
---|
1695 | } |
---|
1696 | |
---|
1697 | struct LabelFinder { |
---|
1698 | std::set< Label > & labels; |
---|
1699 | LabelFinder( std::set< Label > & labels ) : labels( labels ) {} |
---|
1700 | void previsit( Statement * stmt ) { |
---|
1701 | for ( Label & l : stmt->labels ) { |
---|
1702 | labels.insert( l ); |
---|
1703 | } |
---|
1704 | } |
---|
1705 | }; |
---|
1706 | |
---|
1707 | void LabelAddressFixer::premutate( FunctionDecl * funcDecl ) { |
---|
1708 | GuardValue( labels ); |
---|
1709 | PassVisitor<LabelFinder> finder( labels ); |
---|
1710 | funcDecl->accept( finder ); |
---|
1711 | } |
---|
1712 | |
---|
1713 | Expression * LabelAddressFixer::postmutate( AddressExpr * addrExpr ) { |
---|
1714 | // convert &&label into label address |
---|
1715 | if ( AddressExpr * inner = dynamic_cast< AddressExpr * >( addrExpr->arg ) ) { |
---|
1716 | if ( NameExpr * nameExpr = dynamic_cast< NameExpr * >( inner->arg ) ) { |
---|
1717 | if ( labels.count( nameExpr->name ) ) { |
---|
1718 | Label name = nameExpr->name; |
---|
1719 | delete addrExpr; |
---|
1720 | return new LabelAddressExpr( name ); |
---|
1721 | } |
---|
1722 | } |
---|
1723 | } |
---|
1724 | return addrExpr; |
---|
1725 | } |
---|
1726 | |
---|
1727 | namespace { |
---|
1728 | /// Replaces enum types by int, and function/array types in function parameter and return |
---|
1729 | /// lists by appropriate pointers |
---|
1730 | /* |
---|
1731 | struct EnumAndPointerDecay_new { |
---|
1732 | const ast::EnumDecl * previsit( const ast::EnumDecl * enumDecl ) { |
---|
1733 | // set the type of each member of the enumeration to be EnumConstant |
---|
1734 | for ( unsigned i = 0; i < enumDecl->members.size(); ++i ) { |
---|
1735 | // build new version of object with EnumConstant |
---|
1736 | ast::ptr< ast::ObjectDecl > obj = |
---|
1737 | enumDecl->members[i].strict_as< ast::ObjectDecl >(); |
---|
1738 | obj.get_and_mutate()->type = |
---|
1739 | new ast::EnumInstType{ enumDecl->name, ast::CV::Const }; |
---|
1740 | |
---|
1741 | // set into decl |
---|
1742 | ast::EnumDecl * mut = mutate( enumDecl ); |
---|
1743 | mut->members[i] = obj.get(); |
---|
1744 | enumDecl = mut; |
---|
1745 | } |
---|
1746 | return enumDecl; |
---|
1747 | } |
---|
1748 | |
---|
1749 | static const ast::FunctionType * fixFunctionList( |
---|
1750 | const ast::FunctionType * func, |
---|
1751 | std::vector< ast::ptr< ast::DeclWithType > > ast::FunctionType::* field, |
---|
1752 | ast::ArgumentFlag isVarArgs = ast::FixedArgs |
---|
1753 | ) { |
---|
1754 | const auto & dwts = func->* field; |
---|
1755 | unsigned nvals = dwts.size(); |
---|
1756 | bool hasVoid = false; |
---|
1757 | for ( unsigned i = 0; i < nvals; ++i ) { |
---|
1758 | func = ast::mutate_field_index( func, field, i, fixFunction( dwts[i], hasVoid ) ); |
---|
1759 | } |
---|
1760 | |
---|
1761 | // the only case in which "void" is valid is where it is the only one in the list |
---|
1762 | if ( hasVoid && ( nvals > 1 || isVarArgs ) ) { |
---|
1763 | SemanticError( |
---|
1764 | dwts.front()->location, func, "invalid type void in function type" ); |
---|
1765 | } |
---|
1766 | |
---|
1767 | // one void is the only thing in the list, remove it |
---|
1768 | if ( hasVoid ) { |
---|
1769 | func = ast::mutate_field( |
---|
1770 | func, field, std::vector< ast::ptr< ast::DeclWithType > >{} ); |
---|
1771 | } |
---|
1772 | |
---|
1773 | return func; |
---|
1774 | } |
---|
1775 | |
---|
1776 | const ast::FunctionType * previsit( const ast::FunctionType * func ) { |
---|
1777 | func = fixFunctionList( func, &ast::FunctionType::params, func->isVarArgs ); |
---|
1778 | return fixFunctionList( func, &ast::FunctionType::returns ); |
---|
1779 | } |
---|
1780 | }; |
---|
1781 | |
---|
1782 | /// expand assertions from a trait instance, performing appropriate type variable substitutions |
---|
1783 | void expandAssertions( |
---|
1784 | const ast::TraitInstType * inst, std::vector< ast::ptr< ast::DeclWithType > > & out |
---|
1785 | ) { |
---|
1786 | assertf( inst->base, "Trait instance not linked to base trait: %s", toCString( inst ) ); |
---|
1787 | |
---|
1788 | // build list of trait members, substituting trait decl parameters for instance parameters |
---|
1789 | ast::TypeSubstitution sub{ |
---|
1790 | inst->base->params.begin(), inst->base->params.end(), inst->params.begin() }; |
---|
1791 | // deliberately take ast::ptr by-value to ensure this does not mutate inst->base |
---|
1792 | for ( ast::ptr< ast::Decl > decl : inst->base->members ) { |
---|
1793 | auto member = decl.strict_as< ast::DeclWithType >(); |
---|
1794 | sub.apply( member ); |
---|
1795 | out.emplace_back( member ); |
---|
1796 | } |
---|
1797 | } |
---|
1798 | |
---|
1799 | /// Associates forward declarations of aggregates with their definitions |
---|
1800 | class LinkReferenceToTypes_new final |
---|
1801 | : public ast::WithSymbolTable, public ast::WithGuards, public |
---|
1802 | ast::WithVisitorRef<LinkReferenceToTypes_new>, public ast::WithShortCircuiting { |
---|
1803 | |
---|
1804 | // these maps of uses of forward declarations of types need to have the actual type |
---|
1805 | // declaration switched in * after * they have been traversed. To enable this in the |
---|
1806 | // ast::Pass framework, any node that needs to be so mutated has mutate() called on it |
---|
1807 | // before it is placed in the map, properly updating its parents in the usual traversal, |
---|
1808 | // then can have the actual mutation applied later |
---|
1809 | using ForwardEnumsType = std::unordered_multimap< std::string, ast::EnumInstType * >; |
---|
1810 | using ForwardStructsType = std::unordered_multimap< std::string, ast::StructInstType * >; |
---|
1811 | using ForwardUnionsType = std::unordered_multimap< std::string, ast::UnionInstType * >; |
---|
1812 | |
---|
1813 | const CodeLocation & location; |
---|
1814 | const ast::SymbolTable * localSymtab; |
---|
1815 | |
---|
1816 | ForwardEnumsType forwardEnums; |
---|
1817 | ForwardStructsType forwardStructs; |
---|
1818 | ForwardUnionsType forwardUnions; |
---|
1819 | |
---|
1820 | /// true if currently in a generic type body, so that type parameter instances can be |
---|
1821 | /// renamed appropriately |
---|
1822 | bool inGeneric = false; |
---|
1823 | |
---|
1824 | public: |
---|
1825 | /// contstruct using running symbol table |
---|
1826 | LinkReferenceToTypes_new( const CodeLocation & loc ) |
---|
1827 | : location( loc ), localSymtab( &symtab ) {} |
---|
1828 | |
---|
1829 | /// construct using provided symbol table |
---|
1830 | LinkReferenceToTypes_new( const CodeLocation & loc, const ast::SymbolTable & syms ) |
---|
1831 | : location( loc ), localSymtab( &syms ) {} |
---|
1832 | |
---|
1833 | const ast::Type * postvisit( const ast::TypeInstType * typeInst ) { |
---|
1834 | // ensure generic parameter instances are renamed like the base type |
---|
1835 | if ( inGeneric && typeInst->base ) { |
---|
1836 | typeInst = ast::mutate_field( |
---|
1837 | typeInst, &ast::TypeInstType::name, typeInst->base->name ); |
---|
1838 | } |
---|
1839 | |
---|
1840 | if ( |
---|
1841 | auto typeDecl = dynamic_cast< const ast::TypeDecl * >( |
---|
1842 | localSymtab->lookupType( typeInst->name ) ) |
---|
1843 | ) { |
---|
1844 | typeInst = ast::mutate_field( typeInst, &ast::TypeInstType::kind, typeDecl->kind ); |
---|
1845 | } |
---|
1846 | |
---|
1847 | return typeInst; |
---|
1848 | } |
---|
1849 | |
---|
1850 | const ast::Type * postvisit( const ast::EnumInstType * inst ) { |
---|
1851 | const ast::EnumDecl * decl = localSymtab->lookupEnum( inst->name ); |
---|
1852 | // not a semantic error if the enum is not found, just an implicit forward declaration |
---|
1853 | if ( decl ) { |
---|
1854 | inst = ast::mutate_field( inst, &ast::EnumInstType::base, decl ); |
---|
1855 | } |
---|
1856 | if ( ! decl || ! decl->body ) { |
---|
1857 | // forward declaration |
---|
1858 | auto mut = mutate( inst ); |
---|
1859 | forwardEnums.emplace( inst->name, mut ); |
---|
1860 | inst = mut; |
---|
1861 | } |
---|
1862 | return inst; |
---|
1863 | } |
---|
1864 | |
---|
1865 | void checkGenericParameters( const ast::BaseInstType * inst ) { |
---|
1866 | for ( const ast::Expr * param : inst->params ) { |
---|
1867 | if ( ! dynamic_cast< const ast::TypeExpr * >( param ) ) { |
---|
1868 | SemanticError( |
---|
1869 | location, inst, "Expression parameters for generic types are currently " |
---|
1870 | "unsupported: " ); |
---|
1871 | } |
---|
1872 | } |
---|
1873 | } |
---|
1874 | |
---|
1875 | const ast::StructInstType * postvisit( const ast::StructInstType * inst ) { |
---|
1876 | const ast::StructDecl * decl = localSymtab->lookupStruct( inst->name ); |
---|
1877 | // not a semantic error if the struct is not found, just an implicit forward declaration |
---|
1878 | if ( decl ) { |
---|
1879 | inst = ast::mutate_field( inst, &ast::StructInstType::base, decl ); |
---|
1880 | } |
---|
1881 | if ( ! decl || ! decl->body ) { |
---|
1882 | // forward declaration |
---|
1883 | auto mut = mutate( inst ); |
---|
1884 | forwardStructs.emplace( inst->name, mut ); |
---|
1885 | inst = mut; |
---|
1886 | } |
---|
1887 | checkGenericParameters( inst ); |
---|
1888 | return inst; |
---|
1889 | } |
---|
1890 | |
---|
1891 | const ast::UnionInstType * postvisit( const ast::UnionInstType * inst ) { |
---|
1892 | const ast::UnionDecl * decl = localSymtab->lookupUnion( inst->name ); |
---|
1893 | // not a semantic error if the struct is not found, just an implicit forward declaration |
---|
1894 | if ( decl ) { |
---|
1895 | inst = ast::mutate_field( inst, &ast::UnionInstType::base, decl ); |
---|
1896 | } |
---|
1897 | if ( ! decl || ! decl->body ) { |
---|
1898 | // forward declaration |
---|
1899 | auto mut = mutate( inst ); |
---|
1900 | forwardUnions.emplace( inst->name, mut ); |
---|
1901 | inst = mut; |
---|
1902 | } |
---|
1903 | checkGenericParameters( inst ); |
---|
1904 | return inst; |
---|
1905 | } |
---|
1906 | |
---|
1907 | const ast::Type * postvisit( const ast::TraitInstType * traitInst ) { |
---|
1908 | // handle other traits |
---|
1909 | const ast::TraitDecl * traitDecl = localSymtab->lookupTrait( traitInst->name ); |
---|
1910 | if ( ! traitDecl ) { |
---|
1911 | SemanticError( location, "use of undeclared trait " + traitInst->name ); |
---|
1912 | } |
---|
1913 | if ( traitDecl->params.size() != traitInst->params.size() ) { |
---|
1914 | SemanticError( location, traitInst, "incorrect number of trait parameters: " ); |
---|
1915 | } |
---|
1916 | traitInst = ast::mutate_field( traitInst, &ast::TraitInstType::base, traitDecl ); |
---|
1917 | |
---|
1918 | // need to carry over the "sized" status of each decl in the instance |
---|
1919 | for ( unsigned i = 0; i < traitDecl->params.size(); ++i ) { |
---|
1920 | auto expr = traitInst->params[i].as< ast::TypeExpr >(); |
---|
1921 | if ( ! expr ) { |
---|
1922 | SemanticError( |
---|
1923 | traitInst->params[i].get(), "Expression parameters for trait instances " |
---|
1924 | "are currently unsupported: " ); |
---|
1925 | } |
---|
1926 | |
---|
1927 | if ( auto inst = expr->type.as< ast::TypeInstType >() ) { |
---|
1928 | if ( traitDecl->params[i]->sized && ! inst->base->sized ) { |
---|
1929 | // traitInst = ast::mutate_field_index( |
---|
1930 | // traitInst, &ast::TraitInstType::params, i, |
---|
1931 | // ... |
---|
1932 | // ); |
---|
1933 | ast::TraitInstType * mut = ast::mutate( traitInst ); |
---|
1934 | ast::chain_mutate( mut->params[i] ) |
---|
1935 | ( &ast::TypeExpr::type ) |
---|
1936 | ( &ast::TypeInstType::base )->sized = true; |
---|
1937 | traitInst = mut; |
---|
1938 | } |
---|
1939 | } |
---|
1940 | } |
---|
1941 | |
---|
1942 | return traitInst; |
---|
1943 | } |
---|
1944 | |
---|
1945 | void previsit( const ast::QualifiedType * ) { visit_children = false; } |
---|
1946 | |
---|
1947 | const ast::Type * postvisit( const ast::QualifiedType * qualType ) { |
---|
1948 | // linking only makes sense for the "oldest ancestor" of the qualified type |
---|
1949 | return ast::mutate_field( |
---|
1950 | qualType, &ast::QualifiedType::parent, qualType->parent->accept( * visitor ) ); |
---|
1951 | } |
---|
1952 | |
---|
1953 | const ast::Decl * postvisit( const ast::EnumDecl * enumDecl ) { |
---|
1954 | // visit enum members first so that the types of self-referencing members are updated |
---|
1955 | // properly |
---|
1956 | if ( ! enumDecl->body ) return enumDecl; |
---|
1957 | |
---|
1958 | // update forward declarations to point here |
---|
1959 | auto fwds = forwardEnums.equal_range( enumDecl->name ); |
---|
1960 | if ( fwds.first != fwds.second ) { |
---|
1961 | auto inst = fwds.first; |
---|
1962 | do { |
---|
1963 | // forward decl is stored * mutably * in map, can thus be updated |
---|
1964 | inst->second->base = enumDecl; |
---|
1965 | } while ( ++inst != fwds.second ); |
---|
1966 | forwardEnums.erase( fwds.first, fwds.second ); |
---|
1967 | } |
---|
1968 | |
---|
1969 | // ensure that enumerator initializers are properly set |
---|
1970 | for ( unsigned i = 0; i < enumDecl->members.size(); ++i ) { |
---|
1971 | auto field = enumDecl->members[i].strict_as< ast::ObjectDecl >(); |
---|
1972 | if ( field->init ) { |
---|
1973 | // need to resolve enumerator initializers early so that other passes that |
---|
1974 | // determine if an expression is constexpr have appropriate information |
---|
1975 | auto init = field->init.strict_as< ast::SingleInit >(); |
---|
1976 | |
---|
1977 | enumDecl = ast::mutate_field_index( |
---|
1978 | enumDecl, &ast::EnumDecl::members, i, |
---|
1979 | ast::mutate_field( field, &ast::ObjectDecl::init, |
---|
1980 | ast::mutate_field( init, &ast::SingleInit::value, |
---|
1981 | ResolvExpr::findSingleExpression( |
---|
1982 | init->value, new ast::BasicType{ ast::BasicType::SignedInt }, |
---|
1983 | symtab ) ) ) ); |
---|
1984 | } |
---|
1985 | } |
---|
1986 | |
---|
1987 | return enumDecl; |
---|
1988 | } |
---|
1989 | |
---|
1990 | /// rename generic type parameters uniquely so that they do not conflict with user defined |
---|
1991 | /// function forall parameters, e.g. the T in Box and the T in f, below |
---|
1992 | /// forall(otype T) |
---|
1993 | /// struct Box { |
---|
1994 | /// T x; |
---|
1995 | /// }; |
---|
1996 | /// forall(otype T) |
---|
1997 | /// void f(Box(T) b) { |
---|
1998 | /// ... |
---|
1999 | /// } |
---|
2000 | template< typename AggrDecl > |
---|
2001 | const AggrDecl * renameGenericParams( const AggrDecl * aggr ) { |
---|
2002 | GuardValue( inGeneric ); |
---|
2003 | inGeneric = ! aggr->params.empty(); |
---|
2004 | |
---|
2005 | for ( unsigned i = 0; i < aggr->params.size(); ++i ) { |
---|
2006 | const ast::TypeDecl * td = aggr->params[i]; |
---|
2007 | |
---|
2008 | aggr = ast::mutate_field_index( |
---|
2009 | aggr, &AggrDecl::params, i, |
---|
2010 | ast::mutate_field( td, &ast::TypeDecl::name, "__" + td->name + "_generic_" ) ); |
---|
2011 | } |
---|
2012 | return aggr; |
---|
2013 | } |
---|
2014 | |
---|
2015 | const ast::StructDecl * previsit( const ast::StructDecl * structDecl ) { |
---|
2016 | return renameGenericParams( structDecl ); |
---|
2017 | } |
---|
2018 | |
---|
2019 | void postvisit( const ast::StructDecl * structDecl ) { |
---|
2020 | // visit struct members first so that the types of self-referencing members are |
---|
2021 | // updated properly |
---|
2022 | if ( ! structDecl->body ) return; |
---|
2023 | |
---|
2024 | // update forward declarations to point here |
---|
2025 | auto fwds = forwardStructs.equal_range( structDecl->name ); |
---|
2026 | if ( fwds.first != fwds.second ) { |
---|
2027 | auto inst = fwds.first; |
---|
2028 | do { |
---|
2029 | // forward decl is stored * mutably * in map, can thus be updated |
---|
2030 | inst->second->base = structDecl; |
---|
2031 | } while ( ++inst != fwds.second ); |
---|
2032 | forwardStructs.erase( fwds.first, fwds.second ); |
---|
2033 | } |
---|
2034 | } |
---|
2035 | |
---|
2036 | const ast::UnionDecl * previsit( const ast::UnionDecl * unionDecl ) { |
---|
2037 | return renameGenericParams( unionDecl ); |
---|
2038 | } |
---|
2039 | |
---|
2040 | void postvisit( const ast::UnionDecl * unionDecl ) { |
---|
2041 | // visit union members first so that the types of self-referencing members are updated |
---|
2042 | // properly |
---|
2043 | if ( ! unionDecl->body ) return; |
---|
2044 | |
---|
2045 | // update forward declarations to point here |
---|
2046 | auto fwds = forwardUnions.equal_range( unionDecl->name ); |
---|
2047 | if ( fwds.first != fwds.second ) { |
---|
2048 | auto inst = fwds.first; |
---|
2049 | do { |
---|
2050 | // forward decl is stored * mutably * in map, can thus be updated |
---|
2051 | inst->second->base = unionDecl; |
---|
2052 | } while ( ++inst != fwds.second ); |
---|
2053 | forwardUnions.erase( fwds.first, fwds.second ); |
---|
2054 | } |
---|
2055 | } |
---|
2056 | |
---|
2057 | const ast::Decl * postvisit( const ast::TraitDecl * traitDecl ) { |
---|
2058 | // set the "sized" status for the special "sized" trait |
---|
2059 | if ( traitDecl->name == "sized" ) { |
---|
2060 | assertf( traitDecl->params.size() == 1, "Built-in trait 'sized' has incorrect " |
---|
2061 | "number of parameters: %zd", traitDecl->params.size() ); |
---|
2062 | |
---|
2063 | traitDecl = ast::mutate_field_index( |
---|
2064 | traitDecl, &ast::TraitDecl::params, 0, |
---|
2065 | ast::mutate_field( |
---|
2066 | traitDecl->params.front().get(), &ast::TypeDecl::sized, true ) ); |
---|
2067 | } |
---|
2068 | |
---|
2069 | // move assertions from type parameters into the body of the trait |
---|
2070 | std::vector< ast::ptr< ast::DeclWithType > > added; |
---|
2071 | for ( const ast::TypeDecl * td : traitDecl->params ) { |
---|
2072 | for ( const ast::DeclWithType * assn : td->assertions ) { |
---|
2073 | auto inst = dynamic_cast< const ast::TraitInstType * >( assn->get_type() ); |
---|
2074 | if ( inst ) { |
---|
2075 | expandAssertions( inst, added ); |
---|
2076 | } else { |
---|
2077 | added.emplace_back( assn ); |
---|
2078 | } |
---|
2079 | } |
---|
2080 | } |
---|
2081 | if ( ! added.empty() ) { |
---|
2082 | auto mut = mutate( traitDecl ); |
---|
2083 | for ( const ast::DeclWithType * decl : added ) { |
---|
2084 | mut->members.emplace_back( decl ); |
---|
2085 | } |
---|
2086 | traitDecl = mut; |
---|
2087 | } |
---|
2088 | |
---|
2089 | return traitDecl; |
---|
2090 | } |
---|
2091 | }; |
---|
2092 | |
---|
2093 | /// Replaces array and function types in forall lists by appropriate pointer type and assigns |
---|
2094 | /// each object and function declaration a unique ID |
---|
2095 | class ForallPointerDecay_new { |
---|
2096 | const CodeLocation & location; |
---|
2097 | public: |
---|
2098 | ForallPointerDecay_new( const CodeLocation & loc ) : location( loc ) {} |
---|
2099 | |
---|
2100 | const ast::ObjectDecl * previsit( const ast::ObjectDecl * obj ) { |
---|
2101 | // ensure that operator names only apply to functions or function pointers |
---|
2102 | if ( |
---|
2103 | CodeGen::isOperator( obj->name ) |
---|
2104 | && ! dynamic_cast< const ast::FunctionType * >( obj->type->stripDeclarator() ) |
---|
2105 | ) { |
---|
2106 | SemanticError( obj->location, toCString( "operator ", obj->name.c_str(), " is not " |
---|
2107 | "a function or function pointer." ) ); |
---|
2108 | } |
---|
2109 | |
---|
2110 | // ensure object has unique ID |
---|
2111 | if ( obj->uniqueId ) return obj; |
---|
2112 | auto mut = mutate( obj ); |
---|
2113 | mut->fixUniqueId(); |
---|
2114 | return mut; |
---|
2115 | } |
---|
2116 | |
---|
2117 | const ast::FunctionDecl * previsit( const ast::FunctionDecl * func ) { |
---|
2118 | // ensure function has unique ID |
---|
2119 | if ( func->uniqueId ) return func; |
---|
2120 | auto mut = mutate( func ); |
---|
2121 | mut->fixUniqueId(); |
---|
2122 | return mut; |
---|
2123 | } |
---|
2124 | |
---|
2125 | /// Fix up assertions -- flattens assertion lists, removing all trait instances |
---|
2126 | template< typename node_t, typename parent_t > |
---|
2127 | static const node_t * forallFixer( |
---|
2128 | const CodeLocation & loc, const node_t * node, |
---|
2129 | ast::FunctionType::ForallList parent_t::* forallField |
---|
2130 | ) { |
---|
2131 | for ( unsigned i = 0; i < (node->* forallField).size(); ++i ) { |
---|
2132 | const ast::TypeDecl * type = (node->* forallField)[i]; |
---|
2133 | if ( type->assertions.empty() ) continue; |
---|
2134 | |
---|
2135 | std::vector< ast::ptr< ast::DeclWithType > > asserts; |
---|
2136 | asserts.reserve( type->assertions.size() ); |
---|
2137 | |
---|
2138 | // expand trait instances into their members |
---|
2139 | for ( const ast::DeclWithType * assn : type->assertions ) { |
---|
2140 | auto traitInst = |
---|
2141 | dynamic_cast< const ast::TraitInstType * >( assn->get_type() ); |
---|
2142 | if ( traitInst ) { |
---|
2143 | // expand trait instance to all its members |
---|
2144 | expandAssertions( traitInst, asserts ); |
---|
2145 | } else { |
---|
2146 | // pass other assertions through |
---|
2147 | asserts.emplace_back( assn ); |
---|
2148 | } |
---|
2149 | } |
---|
2150 | |
---|
2151 | // apply FixFunction to every assertion to check for invalid void type |
---|
2152 | for ( ast::ptr< ast::DeclWithType > & assn : asserts ) { |
---|
2153 | bool isVoid = false; |
---|
2154 | assn = fixFunction( assn, isVoid ); |
---|
2155 | if ( isVoid ) { |
---|
2156 | SemanticError( loc, node, "invalid type void in assertion of function " ); |
---|
2157 | } |
---|
2158 | } |
---|
2159 | |
---|
2160 | // place mutated assertion list in node |
---|
2161 | auto mut = mutate( type ); |
---|
2162 | mut->assertions = move( asserts ); |
---|
2163 | node = ast::mutate_field_index( node, forallField, i, mut ); |
---|
2164 | } |
---|
2165 | return node; |
---|
2166 | } |
---|
2167 | |
---|
2168 | const ast::FunctionType * previsit( const ast::FunctionType * ftype ) { |
---|
2169 | return forallFixer( location, ftype, &ast::FunctionType::forall ); |
---|
2170 | } |
---|
2171 | |
---|
2172 | const ast::StructDecl * previsit( const ast::StructDecl * aggrDecl ) { |
---|
2173 | return forallFixer( aggrDecl->location, aggrDecl, &ast::StructDecl::params ); |
---|
2174 | } |
---|
2175 | |
---|
2176 | const ast::UnionDecl * previsit( const ast::UnionDecl * aggrDecl ) { |
---|
2177 | return forallFixer( aggrDecl->location, aggrDecl, &ast::UnionDecl::params ); |
---|
2178 | } |
---|
2179 | }; |
---|
2180 | */ |
---|
2181 | } // anonymous namespace |
---|
2182 | |
---|
2183 | /* |
---|
2184 | const ast::Type * validateType( |
---|
2185 | const CodeLocation & loc, const ast::Type * type, const ast::SymbolTable & symtab ) { |
---|
2186 | // ast::Pass< EnumAndPointerDecay_new > epc; |
---|
2187 | ast::Pass< LinkReferenceToTypes_new > lrt{ loc, symtab }; |
---|
2188 | ast::Pass< ForallPointerDecay_new > fpd{ loc }; |
---|
2189 | |
---|
2190 | return type->accept( lrt )->accept( fpd ); |
---|
2191 | } |
---|
2192 | */ |
---|
2193 | |
---|
2194 | } // namespace SymTab |
---|
2195 | |
---|
2196 | // Local Variables: // |
---|
2197 | // tab-width: 4 // |
---|
2198 | // mode: c++ // |
---|
2199 | // compile-command: "make install" // |
---|
2200 | // End: // |
---|