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 | // Autogen.cc -- |
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8 | // |
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9 | // Author : Rob Schluntz |
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10 | // Created On : Thu Mar 03 15:45:56 2016 |
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11 | // Last Modified By : Peter A. Buhr |
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12 | // Last Modified On : Tue Jul 12 17:47:17 2016 |
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13 | // Update Count : 2 |
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14 | // |
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15 | |
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16 | #include <list> |
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17 | #include <iterator> |
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18 | #include "SynTree/Visitor.h" |
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19 | #include "SynTree/Type.h" |
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20 | #include "SynTree/Statement.h" |
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21 | #include "SynTree/TypeSubstitution.h" |
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22 | #include "Common/utility.h" |
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23 | #include "AddVisit.h" |
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24 | #include "MakeLibCfa.h" |
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25 | #include "Autogen.h" |
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26 | |
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27 | namespace SymTab { |
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28 | Type * SizeType = 0; |
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29 | |
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30 | class AutogenerateRoutines : public Visitor { |
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31 | public: |
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32 | std::list< Declaration * > &get_declsToAdd() { return declsToAdd; } |
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33 | |
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34 | virtual void visit( EnumDecl *enumDecl ); |
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35 | virtual void visit( StructDecl *structDecl ); |
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36 | virtual void visit( UnionDecl *structDecl ); |
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37 | virtual void visit( TypeDecl *typeDecl ); |
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38 | virtual void visit( TraitDecl *ctxDecl ); |
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39 | virtual void visit( FunctionDecl *functionDecl ); |
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40 | |
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41 | virtual void visit( FunctionType *ftype ); |
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42 | virtual void visit( PointerType *ftype ); |
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43 | |
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44 | virtual void visit( CompoundStmt *compoundStmt ); |
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45 | virtual void visit( SwitchStmt *switchStmt ); |
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46 | |
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47 | AutogenerateRoutines() : functionNesting( 0 ) {} |
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48 | private: |
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49 | template< typename StmtClass > void visitStatement( StmtClass *stmt ); |
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50 | |
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51 | std::list< Declaration * > declsToAdd; |
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52 | std::set< std::string > structsDone; |
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53 | unsigned int functionNesting; // current level of nested functions |
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54 | }; |
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55 | |
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56 | void autogenerateRoutines( std::list< Declaration * > &translationUnit ) { |
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57 | AutogenerateRoutines visitor; |
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58 | acceptAndAdd( translationUnit, visitor, false ); |
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59 | } |
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60 | |
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61 | bool isUnnamedBitfield( ObjectDecl * obj ) { |
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62 | return obj != NULL && obj->get_name() == "" && obj->get_bitfieldWidth() != NULL; |
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63 | } |
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64 | |
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65 | template< typename OutputIterator > |
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66 | void makeUnionFieldsAssignment( ObjectDecl *srcParam, ObjectDecl *dstParam, UnionInstType *unionType, OutputIterator out ) { |
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67 | UntypedExpr *copy = new UntypedExpr( new NameExpr( "__builtin_memcpy" ) ); |
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68 | copy->get_args().push_back( new VariableExpr( dstParam ) ); |
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69 | copy->get_args().push_back( new AddressExpr( new VariableExpr( srcParam ) ) ); |
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70 | copy->get_args().push_back( new SizeofExpr( srcParam->get_type()->clone() ) ); |
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71 | |
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72 | *out++ = new ExprStmt( noLabels, copy ); |
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73 | } |
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74 | |
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75 | //E ?=?(E volatile*, int), |
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76 | // ?=?(E _Atomic volatile*, int); |
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77 | void makeEnumFunctions( EnumDecl *enumDecl, EnumInstType *refType, unsigned int functionNesting, std::list< Declaration * > &declsToAdd ) { |
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78 | FunctionType *assignType = new FunctionType( Type::Qualifiers(), false ); |
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79 | |
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80 | ObjectDecl *dstParam = new ObjectDecl( "_dst", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), refType ), 0 ); |
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81 | assignType->get_parameters().push_back( dstParam ); |
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82 | |
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83 | // void ?{}(E *); void ^?{}(E *); |
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84 | FunctionType * ctorType = assignType->clone(); |
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85 | FunctionType * dtorType = assignType->clone(); |
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86 | |
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87 | ObjectDecl *srcParam = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, refType->clone(), 0 ); |
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88 | assignType->get_parameters().push_back( srcParam ); |
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89 | // void ?{}(E *, E); |
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90 | FunctionType *copyCtorType = assignType->clone(); |
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91 | |
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92 | // T ?=?(E *, E); |
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93 | ObjectDecl *returnVal = new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, refType->clone(), 0 ); |
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94 | assignType->get_returnVals().push_back( returnVal ); |
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95 | |
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96 | // xxx - should we also generate void ?{}(E *, int) and E ?{}(E *, E)? |
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97 | // right now these cases work, but that might change. |
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98 | |
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99 | // Routines at global scope marked "static" to prevent multiple definitions is separate translation units |
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100 | // because each unit generates copies of the default routines for each aggregate. |
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101 | // xxx - Temporary: make these functions intrinsic so they codegen as C assignment. |
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102 | // Really they're something of a cross between instrinsic and autogen, so should |
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103 | // probably make a new linkage type |
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104 | FunctionDecl *assignDecl = new FunctionDecl( "?=?", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::Intrinsic, assignType, new CompoundStmt( noLabels ), true, false ); |
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105 | FunctionDecl *ctorDecl = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::Intrinsic, ctorType, new CompoundStmt( noLabels ), true, false ); |
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106 | FunctionDecl *copyCtorDecl = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::Intrinsic, copyCtorType, new CompoundStmt( noLabels ), true, false ); |
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107 | FunctionDecl *dtorDecl = new FunctionDecl( "^?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::Intrinsic, dtorType, new CompoundStmt( noLabels ), true, false ); |
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108 | assignDecl->fixUniqueId(); |
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109 | ctorDecl->fixUniqueId(); |
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110 | copyCtorDecl->fixUniqueId(); |
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111 | dtorDecl->fixUniqueId(); |
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112 | |
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113 | // enum copy construct and assignment is just C-style assignment. |
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114 | // this looks like a bad recursive call, but code gen will turn it into |
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115 | // a C-style assignment. |
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116 | // This happens before function pointer type conversion, so need to do it manually here |
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117 | VariableExpr * assignVarExpr = new VariableExpr( assignDecl ); |
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118 | Type *& assignVarExprType = assignVarExpr->get_results().front(); |
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119 | assignVarExprType = new PointerType( Type::Qualifiers(), assignVarExprType ); |
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120 | ApplicationExpr * assignExpr = new ApplicationExpr( assignVarExpr ); |
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121 | assignExpr->get_args().push_back( new VariableExpr( dstParam ) ); |
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122 | assignExpr->get_args().push_back( new VariableExpr( srcParam ) ); |
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123 | |
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124 | // body is either return stmt or expr stmt |
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125 | assignDecl->get_statements()->get_kids().push_back( new ReturnStmt( noLabels, assignExpr ) ); |
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126 | copyCtorDecl->get_statements()->get_kids().push_back( new ExprStmt( noLabels, assignExpr->clone() ) ); |
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127 | |
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128 | declsToAdd.push_back( assignDecl ); |
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129 | declsToAdd.push_back( ctorDecl ); |
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130 | declsToAdd.push_back( copyCtorDecl ); |
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131 | declsToAdd.push_back( dtorDecl ); |
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132 | } |
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133 | |
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134 | /// Clones a reference type, replacing any parameters it may have with a clone of the provided list |
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135 | template< typename GenericInstType > |
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136 | GenericInstType *cloneWithParams( GenericInstType *refType, const std::list< Expression* >& params ) { |
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137 | GenericInstType *clone = refType->clone(); |
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138 | clone->get_parameters().clear(); |
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139 | cloneAll( params, clone->get_parameters() ); |
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140 | return clone; |
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141 | } |
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142 | |
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143 | /// Creates a new type decl that's the same as src, but renamed and with only the ?=?, ?{} (default and copy), and ^?{} assertions (for complete types only) |
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144 | TypeDecl *cloneAndRename( TypeDecl *src, const std::string &name ) { |
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145 | // TypeDecl *dst = new TypeDecl( name, src->get_storageClass(), 0, src->get_kind() ); |
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146 | |
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147 | // if ( src->get_kind() == TypeDecl::Any ) { |
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148 | // TypeInstType *opParamType = new TypeInstType( Type::Qualifiers(), name, dst ); |
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149 | // FunctionType *opFunctionType = new FunctionType( Type::Qualifiers(), false ); |
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150 | // opFunctionType->get_parameters().push_back( |
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151 | // new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), opParamType->clone() ), 0 ) ); |
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152 | // FunctionDecl *ctorAssert = new FunctionDecl( "?{}", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, opFunctionType->clone(), 0, false, false ); |
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153 | // FunctionDecl *dtorAssert = new FunctionDecl( "^?{}", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, opFunctionType->clone(), 0, false, false ); |
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154 | |
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155 | // opFunctionType->get_parameters().push_back( |
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156 | // new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, opParamType, 0 ) ); |
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157 | // FunctionDecl *copyCtorAssert = new FunctionDecl( "?{}", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, opFunctionType->clone(), 0, false, false ); |
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158 | |
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159 | // opFunctionType->get_returnVals().push_back( |
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160 | // new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, opParamType->clone(), 0 ) ); |
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161 | // FunctionDecl *assignAssert = new FunctionDecl( "?=?", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, opFunctionType, 0, false, false ); |
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162 | |
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163 | |
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164 | // dst->get_assertions().push_back( assignAssert ); |
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165 | // dst->get_assertions().push_back( ctorAssert ); |
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166 | // dst->get_assertions().push_back( dtorAssert ); |
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167 | // dst->get_assertions().push_back( copyCtorAssert ); |
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168 | // } |
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169 | |
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170 | TypeDecl *dst = new TypeDecl( src->get_name(), src->get_storageClass(), 0, src->get_kind() ); |
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171 | cloneAll(src->get_assertions(), dst->get_assertions()); |
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172 | return dst; |
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173 | } |
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174 | |
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175 | void makeStructMemberOp( ObjectDecl * dstParam, Expression * src, DeclarationWithType * field, FunctionDecl * func, TypeSubstitution & genericSubs, bool isDynamicLayout, bool forward = true ) { |
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176 | if ( isDynamicLayout && src ) { |
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177 | genericSubs.apply( src ); |
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178 | } |
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179 | |
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180 | ObjectDecl * returnVal = NULL; |
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181 | if ( ! func->get_functionType()->get_returnVals().empty() ) { |
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182 | returnVal = dynamic_cast<ObjectDecl*>( func->get_functionType()->get_returnVals().front() ); |
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183 | } |
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184 | |
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185 | InitTweak::InitExpander srcParam( src ); |
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186 | |
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187 | // assign to destination (and return value if generic) |
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188 | UntypedExpr *derefExpr = new UntypedExpr( new NameExpr( "*?" ) ); |
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189 | derefExpr->get_args().push_back( new VariableExpr( dstParam ) ); |
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190 | Expression *dstselect = new MemberExpr( field, derefExpr ); |
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191 | genImplicitCall( srcParam, dstselect, func->get_name(), back_inserter( func->get_statements()->get_kids() ), field, forward ); |
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192 | |
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193 | if ( isDynamicLayout && returnVal ) { |
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194 | UntypedExpr *derefRet = new UntypedExpr( new NameExpr( "*?" ) ); |
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195 | derefRet->get_args().push_back( new VariableExpr( returnVal ) ); |
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196 | Expression *retselect = new MemberExpr( field, derefRet ); |
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197 | genImplicitCall( srcParam, retselect, func->get_name(), back_inserter( func->get_statements()->get_kids() ), field, forward ); |
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198 | } // if |
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199 | } |
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200 | |
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201 | template<typename Iterator> |
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202 | void makeStructFunctionBody( Iterator member, Iterator end, FunctionDecl * func, TypeSubstitution & genericSubs, bool isDynamicLayout, bool forward = true ) { |
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203 | for ( ; member != end; ++member ) { |
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204 | if ( DeclarationWithType *field = dynamic_cast< DeclarationWithType * >( *member ) ) { // otherwise some form of type declaration, e.g. Aggregate |
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205 | // query the type qualifiers of this field and skip assigning it if it is marked const. |
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206 | // If it is an array type, we need to strip off the array layers to find its qualifiers. |
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207 | Type * type = field->get_type(); |
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208 | while ( ArrayType * at = dynamic_cast< ArrayType * >( type ) ) { |
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209 | type = at->get_base(); |
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210 | } |
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211 | |
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212 | if ( type->get_qualifiers().isConst && func->get_name() == "?=?" ) { |
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213 | // don't assign const members, but do construct/destruct |
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214 | continue; |
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215 | } |
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216 | |
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217 | if ( field->get_name() == "" ) { |
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218 | // don't assign to anonymous members |
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219 | // xxx - this is a temporary fix. Anonymous members tie into |
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220 | // our inheritance model. I think the correct way to handle this is to |
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221 | // cast the structure to the type of the member and let the resolver |
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222 | // figure out whether it's valid and have a pass afterwards that fixes |
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223 | // the assignment to use pointer arithmetic with the offset of the |
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224 | // member, much like how generic type members are handled. |
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225 | continue; |
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226 | } |
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227 | |
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228 | assert( ! func->get_functionType()->get_parameters().empty() ); |
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229 | ObjectDecl * dstParam = dynamic_cast<ObjectDecl*>( func->get_functionType()->get_parameters().front() ); |
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230 | ObjectDecl * srcParam = NULL; |
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231 | if ( func->get_functionType()->get_parameters().size() == 2 ) { |
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232 | srcParam = dynamic_cast<ObjectDecl*>( func->get_functionType()->get_parameters().back() ); |
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233 | } |
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234 | // srcParam may be NULL, in which case we have default ctor/dtor |
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235 | assert( dstParam ); |
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236 | |
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237 | Expression *srcselect = srcParam ? new MemberExpr( field, new VariableExpr( srcParam ) ) : NULL; |
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238 | makeStructMemberOp( dstParam, srcselect, field, func, genericSubs, isDynamicLayout, forward ); |
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239 | } // if |
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240 | } // for |
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241 | } // makeStructFunctionBody |
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242 | |
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243 | /// generate the body of a constructor which takes parameters that match fields, e.g. |
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244 | /// void ?{}(A *, int) and void?{}(A *, int, int) for a struct A which has two int fields. |
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245 | template<typename Iterator> |
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246 | void makeStructFieldCtorBody( Iterator member, Iterator end, FunctionDecl * func, TypeSubstitution & genericSubs, bool isDynamicLayout ) { |
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247 | FunctionType * ftype = func->get_functionType(); |
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248 | std::list<DeclarationWithType*> & params = ftype->get_parameters(); |
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249 | assert( params.size() >= 2 ); // should not call this function for default ctor, etc. |
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250 | |
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251 | // skip 'this' parameter |
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252 | ObjectDecl * dstParam = dynamic_cast<ObjectDecl*>( params.front() ); |
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253 | assert( dstParam ); |
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254 | std::list<DeclarationWithType*>::iterator parameter = params.begin()+1; |
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255 | for ( ; member != end; ++member ) { |
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256 | if ( DeclarationWithType * field = dynamic_cast<DeclarationWithType*>( *member ) ) { |
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257 | if ( isUnnamedBitfield( dynamic_cast< ObjectDecl * > ( field ) ) ) { |
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258 | // don't make a function whose parameter is an unnamed bitfield |
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259 | continue; |
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260 | } else if ( field->get_name() == "" ) { |
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261 | // don't assign to anonymous members |
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262 | // xxx - this is a temporary fix. Anonymous members tie into |
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263 | // our inheritance model. I think the correct way to handle this is to |
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264 | // cast the structure to the type of the member and let the resolver |
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265 | // figure out whether it's valid and have a pass afterwards that fixes |
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266 | // the assignment to use pointer arithmetic with the offset of the |
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267 | // member, much like how generic type members are handled. |
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268 | continue; |
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269 | } else if ( parameter != params.end() ) { |
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270 | // matching parameter, initialize field with copy ctor |
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271 | Expression *srcselect = new VariableExpr(*parameter); |
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272 | makeStructMemberOp( dstParam, srcselect, field, func, genericSubs, isDynamicLayout ); |
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273 | ++parameter; |
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274 | } else { |
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275 | // no matching parameter, initialize field with default ctor |
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276 | makeStructMemberOp( dstParam, NULL, field, func, genericSubs, isDynamicLayout ); |
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277 | } |
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278 | } |
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279 | } |
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280 | } |
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281 | |
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282 | void makeStructFunctions( StructDecl *aggregateDecl, StructInstType *refType, unsigned int functionNesting, std::list< Declaration * > & declsToAdd ) { |
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283 | FunctionType *assignType = new FunctionType( Type::Qualifiers(), false ); |
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284 | |
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285 | // Make function polymorphic in same parameters as generic struct, if applicable |
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286 | bool isDynamicLayout = false; // NOTE this flag is an incredibly ugly kludge; we should fix the assignment signature instead (ditto for union) |
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287 | std::list< TypeDecl* >& genericParams = aggregateDecl->get_parameters(); |
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288 | std::list< Expression* > structParams; // List of matching parameters to put on types |
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289 | TypeSubstitution genericSubs; // Substitutions to make to member types of struct |
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290 | for ( std::list< TypeDecl* >::const_iterator param = genericParams.begin(); param != genericParams.end(); ++param ) { |
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291 | if ( (*param)->get_kind() == TypeDecl::Any ) isDynamicLayout = true; |
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292 | TypeDecl *typeParam = cloneAndRename( *param, "_autoassign_" + aggregateDecl->get_name() + "_" + (*param)->get_name() ); |
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293 | assignType->get_forall().push_back( typeParam ); |
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294 | TypeInstType *newParamType = new TypeInstType( Type::Qualifiers(), typeParam->get_name(), typeParam ); |
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295 | genericSubs.add( (*param)->get_name(), newParamType ); |
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296 | structParams.push_back( new TypeExpr( newParamType ) ); |
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297 | } |
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298 | |
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299 | ObjectDecl *dstParam = new ObjectDecl( "_dst", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), cloneWithParams( refType, structParams ) ), 0 ); |
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300 | assignType->get_parameters().push_back( dstParam ); |
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301 | |
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302 | // void ?{}(T *); void ^?{}(T *); |
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303 | FunctionType *ctorType = assignType->clone(); |
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304 | FunctionType *dtorType = assignType->clone(); |
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305 | |
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306 | ObjectDecl *srcParam = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, cloneWithParams( refType, structParams ), 0 ); |
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307 | assignType->get_parameters().push_back( srcParam ); |
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308 | |
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309 | // void ?{}(T *, T); |
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310 | FunctionType *copyCtorType = assignType->clone(); |
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311 | |
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312 | // T ?=?(T *, T); |
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313 | ObjectDecl *returnVal = new ObjectDecl( "_ret", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, cloneWithParams( refType, structParams ), 0 ); |
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314 | assignType->get_returnVals().push_back( returnVal ); |
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315 | |
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316 | // Routines at global scope marked "static" to prevent multiple definitions is separate translation units |
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317 | // because each unit generates copies of the default routines for each aggregate. |
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318 | FunctionDecl *assignDecl = new FunctionDecl( "?=?", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, assignType, new CompoundStmt( noLabels ), true, false ); |
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319 | FunctionDecl *ctorDecl = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, ctorType, new CompoundStmt( noLabels ), true, false ); |
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320 | FunctionDecl *copyCtorDecl = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, copyCtorType, new CompoundStmt( noLabels ), true, false ); |
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321 | FunctionDecl *dtorDecl = new FunctionDecl( "^?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, dtorType, new CompoundStmt( noLabels ), true, false ); |
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322 | assignDecl->fixUniqueId(); |
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323 | ctorDecl->fixUniqueId(); |
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324 | copyCtorDecl->fixUniqueId(); |
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325 | dtorDecl->fixUniqueId(); |
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326 | |
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327 | // create constructors which take each member type as a parameter. |
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328 | // for example, for struct A { int x, y; }; generate |
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329 | // void ?{}(A *, int) and void ?{}(A *, int, int) |
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330 | std::list<Declaration *> memCtors; |
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331 | FunctionType * memCtorType = ctorType->clone(); |
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332 | for ( std::list<Declaration *>::iterator i = aggregateDecl->get_members().begin(); i != aggregateDecl->get_members().end(); ++i ) { |
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333 | DeclarationWithType * member = dynamic_cast<DeclarationWithType *>( *i ); |
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334 | assert( member ); |
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335 | if ( isUnnamedBitfield( dynamic_cast< ObjectDecl * > ( member ) ) ) { |
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336 | // don't make a function whose parameter is an unnamed bitfield |
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337 | continue; |
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338 | } else if ( member->get_name() == "" ) { |
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339 | // don't assign to anonymous members |
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340 | // xxx - this is a temporary fix. Anonymous members tie into |
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341 | // our inheritance model. I think the correct way to handle this is to |
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342 | // cast the structure to the type of the member and let the resolver |
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343 | // figure out whether it's valid and have a pass afterwards that fixes |
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344 | // the assignment to use pointer arithmetic with the offset of the |
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345 | // member, much like how generic type members are handled. |
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346 | continue; |
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347 | } |
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348 | memCtorType->get_parameters().push_back( new ObjectDecl( member->get_name(), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, member->get_type()->clone(), 0 ) ); |
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349 | FunctionDecl * ctor = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, memCtorType->clone(), new CompoundStmt( noLabels ), true, false ); |
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350 | ctor->fixUniqueId(); |
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351 | makeStructFieldCtorBody( aggregateDecl->get_members().begin(), aggregateDecl->get_members().end(), ctor, genericSubs, isDynamicLayout ); |
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352 | memCtors.push_back( ctor ); |
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353 | } |
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354 | delete memCtorType; |
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355 | |
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356 | // generate appropriate calls to member ctor, assignment |
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357 | makeStructFunctionBody( aggregateDecl->get_members().begin(), aggregateDecl->get_members().end(), assignDecl, genericSubs, isDynamicLayout ); |
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358 | makeStructFunctionBody( aggregateDecl->get_members().begin(), aggregateDecl->get_members().end(), ctorDecl, genericSubs, isDynamicLayout ); |
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359 | makeStructFunctionBody( aggregateDecl->get_members().begin(), aggregateDecl->get_members().end(), copyCtorDecl, genericSubs, isDynamicLayout ); |
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360 | // needs to do everything in reverse, so pass "forward" as false |
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361 | makeStructFunctionBody( aggregateDecl->get_members().rbegin(), aggregateDecl->get_members().rend(), dtorDecl, genericSubs, isDynamicLayout, false ); |
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362 | |
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363 | if ( ! isDynamicLayout ) assignDecl->get_statements()->get_kids().push_back( new ReturnStmt( noLabels, new VariableExpr( srcParam ) ) ); |
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364 | |
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365 | declsToAdd.push_back( assignDecl ); |
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366 | declsToAdd.push_back( ctorDecl ); |
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367 | declsToAdd.push_back( copyCtorDecl ); |
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368 | declsToAdd.push_back( dtorDecl ); |
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369 | declsToAdd.splice( declsToAdd.end(), memCtors ); |
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370 | } |
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371 | |
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372 | void makeUnionFunctions( UnionDecl *aggregateDecl, UnionInstType *refType, unsigned int functionNesting, std::list< Declaration * > & declsToAdd ) { |
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373 | FunctionType *assignType = new FunctionType( Type::Qualifiers(), false ); |
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374 | |
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375 | // Make function polymorphic in same parameters as generic union, if applicable |
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376 | bool isDynamicLayout = false; // NOTE this flag is an incredibly ugly kludge; we should fix the assignment signature instead (ditto for struct) |
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377 | std::list< TypeDecl* >& genericParams = aggregateDecl->get_parameters(); |
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378 | std::list< Expression* > unionParams; // List of matching parameters to put on types |
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379 | for ( std::list< TypeDecl* >::const_iterator param = genericParams.begin(); param != genericParams.end(); ++param ) { |
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380 | if ( (*param)->get_kind() == TypeDecl::Any ) isDynamicLayout = true; |
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381 | TypeDecl *typeParam = cloneAndRename( *param, "_autoassign_" + aggregateDecl->get_name() + "_" + (*param)->get_name() ); |
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382 | assignType->get_forall().push_back( typeParam ); |
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383 | unionParams.push_back( new TypeExpr( new TypeInstType( Type::Qualifiers(), typeParam->get_name(), typeParam ) ) ); |
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384 | } |
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385 | |
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386 | ObjectDecl *dstParam = new ObjectDecl( "_dst", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), cloneWithParams( refType, unionParams ) ), 0 ); |
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387 | assignType->get_parameters().push_back( dstParam ); |
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388 | |
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389 | // default ctor/dtor need only first parameter |
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390 | FunctionType * ctorType = assignType->clone(); |
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391 | FunctionType * dtorType = assignType->clone(); |
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392 | |
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393 | ObjectDecl *srcParam = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, cloneWithParams( refType, unionParams ), 0 ); |
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394 | assignType->get_parameters().push_back( srcParam ); |
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395 | |
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396 | // copy ctor needs both parameters |
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397 | FunctionType * copyCtorType = assignType->clone(); |
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398 | |
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399 | // assignment needs both and return value |
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400 | ObjectDecl *returnVal = new ObjectDecl( "_ret", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, cloneWithParams( refType, unionParams ), 0 ); |
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401 | assignType->get_returnVals().push_back( returnVal ); |
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402 | |
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403 | // Routines at global scope marked "static" to prevent multiple definitions is separate translation units |
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404 | // because each unit generates copies of the default routines for each aggregate. |
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405 | FunctionDecl *assignDecl = new FunctionDecl( "?=?", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, assignType, new CompoundStmt( noLabels ), true, false ); |
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406 | FunctionDecl *ctorDecl = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, ctorType, new CompoundStmt( noLabels ), true, false ); |
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407 | FunctionDecl *copyCtorDecl = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, copyCtorType, NULL, true, false ); |
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408 | FunctionDecl *dtorDecl = new FunctionDecl( "^?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, dtorType, new CompoundStmt( noLabels ), true, false ); |
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409 | |
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410 | assignDecl->fixUniqueId(); |
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411 | ctorDecl->fixUniqueId(); |
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412 | copyCtorDecl->fixUniqueId(); |
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413 | dtorDecl->fixUniqueId(); |
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414 | |
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415 | makeUnionFieldsAssignment( srcParam, dstParam, cloneWithParams( refType, unionParams ), back_inserter( assignDecl->get_statements()->get_kids() ) ); |
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416 | if ( isDynamicLayout ) makeUnionFieldsAssignment( srcParam, returnVal, cloneWithParams( refType, unionParams ), back_inserter( assignDecl->get_statements()->get_kids() ) ); |
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417 | else assignDecl->get_statements()->get_kids().push_back( new ReturnStmt( noLabels, new VariableExpr( srcParam ) ) ); |
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418 | |
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419 | // body of assignment and copy ctor is the same |
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420 | copyCtorDecl->set_statements( assignDecl->get_statements()->clone() ); |
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421 | |
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422 | // create a constructor which takes the first member type as a parameter. |
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423 | // for example, for Union A { int x; double y; }; generate |
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424 | // void ?{}(A *, int) |
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425 | // This is to mimic C's behaviour which initializes the first member of the union. |
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426 | std::list<Declaration *> memCtors; |
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427 | for ( Declaration * member : aggregateDecl->get_members() ) { |
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428 | if ( DeclarationWithType * field = dynamic_cast< DeclarationWithType * >( member ) ) { |
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429 | ObjectDecl * srcParam = new ObjectDecl( "src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, field->get_type()->clone(), 0 ); |
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430 | |
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431 | FunctionType * memCtorType = ctorType->clone(); |
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432 | memCtorType->get_parameters().push_back( srcParam ); |
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433 | FunctionDecl * ctor = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, memCtorType, new CompoundStmt( noLabels ), true, false ); |
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434 | ctor->fixUniqueId(); |
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435 | |
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436 | makeUnionFieldsAssignment( srcParam, dstParam, cloneWithParams( refType, unionParams ), back_inserter( ctor->get_statements()->get_kids() ) ); |
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437 | memCtors.push_back( ctor ); |
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438 | // only generate a ctor for the first field |
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439 | break; |
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440 | } |
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441 | } |
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442 | |
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443 | declsToAdd.push_back( assignDecl ); |
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444 | declsToAdd.push_back( ctorDecl ); |
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445 | declsToAdd.push_back( copyCtorDecl ); |
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446 | declsToAdd.push_back( dtorDecl ); |
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447 | declsToAdd.splice( declsToAdd.end(), memCtors ); |
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448 | } |
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449 | |
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450 | void AutogenerateRoutines::visit( EnumDecl *enumDecl ) { |
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451 | if ( ! enumDecl->get_members().empty() ) { |
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452 | EnumInstType *enumInst = new EnumInstType( Type::Qualifiers(), enumDecl->get_name() ); |
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453 | // enumInst->set_baseEnum( enumDecl ); |
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454 | // declsToAdd.push_back( |
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455 | makeEnumFunctions( enumDecl, enumInst, functionNesting, declsToAdd ); |
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456 | } |
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457 | } |
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458 | |
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459 | void AutogenerateRoutines::visit( StructDecl *structDecl ) { |
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460 | if ( ! structDecl->get_members().empty() && structsDone.find( structDecl->get_name() ) == structsDone.end() ) { |
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461 | StructInstType structInst( Type::Qualifiers(), structDecl->get_name() ); |
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462 | structInst.set_baseStruct( structDecl ); |
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463 | makeStructFunctions( structDecl, &structInst, functionNesting, declsToAdd ); |
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464 | structsDone.insert( structDecl->get_name() ); |
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465 | } // if |
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466 | } |
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467 | |
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468 | void AutogenerateRoutines::visit( UnionDecl *unionDecl ) { |
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469 | if ( ! unionDecl->get_members().empty() ) { |
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470 | UnionInstType unionInst( Type::Qualifiers(), unionDecl->get_name() ); |
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471 | unionInst.set_baseUnion( unionDecl ); |
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472 | makeUnionFunctions( unionDecl, &unionInst, functionNesting, declsToAdd ); |
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473 | } // if |
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474 | } |
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475 | |
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476 | void AutogenerateRoutines::visit( TypeDecl *typeDecl ) { |
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477 | CompoundStmt *stmts = 0; |
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478 | TypeInstType *typeInst = new TypeInstType( Type::Qualifiers(), typeDecl->get_name(), false ); |
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479 | typeInst->set_baseType( typeDecl ); |
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480 | ObjectDecl *src = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, typeInst->clone(), 0 ); |
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481 | ObjectDecl *dst = new ObjectDecl( "_dst", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), typeInst->clone() ), 0 ); |
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482 | if ( typeDecl->get_base() ) { |
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483 | // xxx - generate ctor/dtors for typedecls, e.g. |
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484 | // otype T = int *; |
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485 | stmts = new CompoundStmt( std::list< Label >() ); |
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486 | UntypedExpr *assign = new UntypedExpr( new NameExpr( "?=?" ) ); |
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487 | assign->get_args().push_back( new CastExpr( new VariableExpr( dst ), new PointerType( Type::Qualifiers(), typeDecl->get_base()->clone() ) ) ); |
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488 | assign->get_args().push_back( new CastExpr( new VariableExpr( src ), typeDecl->get_base()->clone() ) ); |
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489 | stmts->get_kids().push_back( new ReturnStmt( std::list< Label >(), assign ) ); |
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490 | } // if |
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491 | FunctionType *type = new FunctionType( Type::Qualifiers(), false ); |
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492 | type->get_returnVals().push_back( new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, typeInst, 0 ) ); |
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493 | type->get_parameters().push_back( dst ); |
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494 | type->get_parameters().push_back( src ); |
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495 | FunctionDecl *func = new FunctionDecl( "?=?", DeclarationNode::NoStorageClass, LinkageSpec::AutoGen, type, stmts, true, false ); |
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496 | declsToAdd.push_back( func ); |
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497 | } |
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498 | |
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499 | void addDecls( std::list< Declaration * > &declsToAdd, std::list< Statement * > &statements, std::list< Statement * >::iterator i ) { |
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500 | for ( std::list< Declaration * >::iterator decl = declsToAdd.begin(); decl != declsToAdd.end(); ++decl ) { |
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501 | statements.insert( i, new DeclStmt( noLabels, *decl ) ); |
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502 | } // for |
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503 | declsToAdd.clear(); |
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504 | } |
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505 | |
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506 | void AutogenerateRoutines::visit( FunctionType *) { |
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507 | // ensure that we don't add assignment ops for types defined as part of the function |
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508 | } |
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509 | |
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510 | void AutogenerateRoutines::visit( PointerType *) { |
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511 | // ensure that we don't add assignment ops for types defined as part of the pointer |
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512 | } |
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513 | |
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514 | void AutogenerateRoutines::visit( TraitDecl *) { |
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515 | // ensure that we don't add assignment ops for types defined as part of the trait |
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516 | } |
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517 | |
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518 | template< typename StmtClass > |
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519 | inline void AutogenerateRoutines::visitStatement( StmtClass *stmt ) { |
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520 | std::set< std::string > oldStructs = structsDone; |
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521 | addVisit( stmt, *this ); |
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522 | structsDone = oldStructs; |
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523 | } |
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524 | |
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525 | void AutogenerateRoutines::visit( FunctionDecl *functionDecl ) { |
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526 | maybeAccept( functionDecl->get_functionType(), *this ); |
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527 | acceptAll( functionDecl->get_oldDecls(), *this ); |
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528 | functionNesting += 1; |
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529 | maybeAccept( functionDecl->get_statements(), *this ); |
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530 | functionNesting -= 1; |
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531 | } |
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532 | |
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533 | void AutogenerateRoutines::visit( CompoundStmt *compoundStmt ) { |
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534 | visitStatement( compoundStmt ); |
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535 | } |
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536 | |
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537 | void AutogenerateRoutines::visit( SwitchStmt *switchStmt ) { |
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538 | visitStatement( switchStmt ); |
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539 | } |
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540 | } // SymTab |
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