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 | // GenPoly.cc -- |
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8 | // |
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9 | // Author : Richard C. Bilson |
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10 | // Created On : Mon May 18 07:44:20 2015 |
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11 | // Last Modified By : Peter A. Buhr |
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12 | // Last Modified On : Wed Jun 29 21:45:53 2016 |
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13 | // Update Count : 14 |
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14 | // |
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15 | |
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16 | #include "GenPoly.h" |
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17 | |
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18 | #include "SynTree/Expression.h" |
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19 | #include "SynTree/Type.h" |
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20 | |
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21 | #include <iostream> |
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22 | using namespace std; |
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23 | |
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24 | namespace GenPoly { |
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25 | namespace { |
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26 | /// Checks a parameter list for polymorphic parameters; will substitute according to env if present |
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27 | bool hasPolyParams( std::list< Expression* >& params, const TypeSubstitution *env ) { |
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28 | for ( std::list< Expression* >::iterator param = params.begin(); param != params.end(); ++param ) { |
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29 | TypeExpr *paramType = dynamic_cast< TypeExpr* >( *param ); |
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30 | assertf(paramType, "Aggregate parameters should be type expressions"); |
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31 | if ( isPolyType( paramType->get_type(), env ) ) return true; |
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32 | } |
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33 | return false; |
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34 | } |
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35 | |
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36 | /// Checks a parameter list for polymorphic parameters from tyVars; will substitute according to env if present |
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37 | bool hasPolyParams( std::list< Expression* >& params, const TyVarMap &tyVars, const TypeSubstitution *env ) { |
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38 | for ( std::list< Expression* >::iterator param = params.begin(); param != params.end(); ++param ) { |
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39 | TypeExpr *paramType = dynamic_cast< TypeExpr* >( *param ); |
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40 | assert(paramType && "Aggregate parameters should be type expressions"); |
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41 | if ( isPolyType( paramType->get_type(), tyVars, env ) ) return true; |
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42 | } |
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43 | return false; |
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44 | } |
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45 | |
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46 | /// Checks a parameter list for dynamic-layout parameters from tyVars; will substitute according to env if present |
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47 | bool hasDynParams( std::list< Expression* >& params, const TyVarMap &tyVars, const TypeSubstitution *env ) { |
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48 | for ( std::list< Expression* >::iterator param = params.begin(); param != params.end(); ++param ) { |
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49 | TypeExpr *paramType = dynamic_cast< TypeExpr* >( *param ); |
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50 | assert(paramType && "Aggregate parameters should be type expressions"); |
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51 | if ( isDynType( paramType->get_type(), tyVars, env ) ) return true; |
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52 | } |
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53 | return false; |
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54 | } |
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55 | } |
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56 | |
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57 | Type* replaceTypeInst( Type* type, const TypeSubstitution* env ) { |
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58 | if ( ! env ) return type; |
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59 | if ( TypeInstType *typeInst = dynamic_cast< TypeInstType* >( type ) ) { |
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60 | Type *newType = env->lookup( typeInst->get_name() ); |
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61 | if ( newType ) return newType; |
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62 | } |
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63 | return type; |
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64 | } |
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65 | |
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66 | Type *isPolyType( Type *type, const TypeSubstitution *env ) { |
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67 | type = replaceTypeInst( type, env ); |
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68 | |
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69 | if ( dynamic_cast< TypeInstType * >( type ) ) { |
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70 | return type; |
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71 | } else if ( StructInstType *structType = dynamic_cast< StructInstType* >( type ) ) { |
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72 | if ( hasPolyParams( structType->get_parameters(), env ) ) return type; |
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73 | } else if ( UnionInstType *unionType = dynamic_cast< UnionInstType* >( type ) ) { |
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74 | if ( hasPolyParams( unionType->get_parameters(), env ) ) return type; |
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75 | } |
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76 | return 0; |
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77 | } |
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78 | |
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79 | Type *isPolyType( Type *type, const TyVarMap &tyVars, const TypeSubstitution *env ) { |
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80 | type = replaceTypeInst( type, env ); |
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81 | |
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82 | if ( TypeInstType *typeInst = dynamic_cast< TypeInstType * >( type ) ) { |
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83 | if ( tyVars.find( typeInst->get_name() ) != tyVars.end() ) { |
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84 | return type; |
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85 | } |
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86 | } else if ( StructInstType *structType = dynamic_cast< StructInstType* >( type ) ) { |
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87 | if ( hasPolyParams( structType->get_parameters(), tyVars, env ) ) return type; |
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88 | } else if ( UnionInstType *unionType = dynamic_cast< UnionInstType* >( type ) ) { |
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89 | if ( hasPolyParams( unionType->get_parameters(), tyVars, env ) ) return type; |
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90 | } |
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91 | return 0; |
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92 | } |
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93 | |
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94 | ReferenceToType *isDynType( Type *type, const TyVarMap &tyVars, const TypeSubstitution *env ) { |
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95 | type = replaceTypeInst( type, env ); |
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96 | |
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97 | if ( TypeInstType *typeInst = dynamic_cast< TypeInstType * >( type ) ) { |
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98 | auto var = tyVars.find( typeInst->get_name() ); |
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99 | if ( var != tyVars.end() && var->second.isComplete ) { |
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100 | return typeInst; |
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101 | } |
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102 | } else if ( StructInstType *structType = dynamic_cast< StructInstType* >( type ) ) { |
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103 | if ( hasDynParams( structType->get_parameters(), tyVars, env ) ) return structType; |
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104 | } else if ( UnionInstType *unionType = dynamic_cast< UnionInstType* >( type ) ) { |
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105 | if ( hasDynParams( unionType->get_parameters(), tyVars, env ) ) return unionType; |
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106 | } |
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107 | return 0; |
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108 | } |
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109 | |
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110 | ReferenceToType *isDynRet( FunctionType *function, const TyVarMap &forallTypes ) { |
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111 | if ( function->get_returnVals().empty() ) return 0; |
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112 | |
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113 | return (ReferenceToType*)isDynType( function->get_returnVals().front()->get_type(), forallTypes ); |
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114 | } |
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115 | |
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116 | ReferenceToType *isDynRet( FunctionType *function ) { |
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117 | if ( function->get_returnVals().empty() ) return 0; |
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118 | |
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119 | TyVarMap forallTypes( TypeDecl::Data{} ); |
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120 | makeTyVarMap( function, forallTypes ); |
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121 | return (ReferenceToType*)isDynType( function->get_returnVals().front()->get_type(), forallTypes ); |
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122 | } |
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123 | |
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124 | bool needsAdapter( FunctionType *adaptee, const TyVarMap &tyVars ) { |
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125 | // if ( ! adaptee->get_returnVals().empty() && isPolyType( adaptee->get_returnVals().front()->get_type(), tyVars ) ) { |
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126 | // return true; |
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127 | // } // if |
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128 | if ( isDynRet( adaptee, tyVars ) ) return true; |
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129 | |
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130 | for ( std::list< DeclarationWithType* >::const_iterator innerArg = adaptee->get_parameters().begin(); innerArg != adaptee->get_parameters().end(); ++innerArg ) { |
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131 | // if ( isPolyType( (*innerArg)->get_type(), tyVars ) ) { |
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132 | if ( isDynType( (*innerArg)->get_type(), tyVars ) ) { |
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133 | return true; |
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134 | } // if |
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135 | } // for |
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136 | return false; |
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137 | } |
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138 | |
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139 | Type *isPolyPtr( Type *type, const TypeSubstitution *env ) { |
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140 | type = replaceTypeInst( type, env ); |
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141 | |
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142 | if ( PointerType *ptr = dynamic_cast< PointerType *>( type ) ) { |
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143 | return isPolyType( ptr->get_base(), env ); |
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144 | } |
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145 | return 0; |
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146 | } |
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147 | |
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148 | Type *isPolyPtr( Type *type, const TyVarMap &tyVars, const TypeSubstitution *env ) { |
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149 | type = replaceTypeInst( type, env ); |
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150 | |
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151 | if ( PointerType *ptr = dynamic_cast< PointerType *>( type ) ) { |
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152 | return isPolyType( ptr->get_base(), tyVars, env ); |
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153 | } |
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154 | return 0; |
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155 | } |
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156 | |
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157 | Type * hasPolyBase( Type *type, int *levels, const TypeSubstitution *env ) { |
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158 | int dummy; |
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159 | if ( ! levels ) { levels = &dummy; } |
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160 | *levels = 0; |
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161 | |
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162 | while ( true ) { |
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163 | type = replaceTypeInst( type, env ); |
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164 | |
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165 | if ( PointerType *ptr = dynamic_cast< PointerType *>( type ) ) { |
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166 | type = ptr->get_base(); |
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167 | ++(*levels); |
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168 | } else break; |
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169 | } |
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170 | |
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171 | return isPolyType( type, env ); |
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172 | } |
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173 | |
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174 | Type * hasPolyBase( Type *type, const TyVarMap &tyVars, int *levels, const TypeSubstitution *env ) { |
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175 | int dummy; |
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176 | if ( ! levels ) { levels = &dummy; } |
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177 | *levels = 0; |
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178 | |
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179 | while ( true ) { |
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180 | type = replaceTypeInst( type, env ); |
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181 | |
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182 | if ( PointerType *ptr = dynamic_cast< PointerType *>( type ) ) { |
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183 | type = ptr->get_base(); |
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184 | ++(*levels); |
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185 | } else break; |
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186 | } |
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187 | |
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188 | return isPolyType( type, tyVars, env ); |
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189 | } |
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190 | |
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191 | FunctionType * getFunctionType( Type *ty ) { |
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192 | PointerType *ptrType; |
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193 | if ( ( ptrType = dynamic_cast< PointerType* >( ty ) ) ) { |
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194 | return dynamic_cast< FunctionType* >( ptrType->get_base() ); // pointer if FunctionType, NULL otherwise |
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195 | } else { |
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196 | return dynamic_cast< FunctionType* >( ty ); // pointer if FunctionType, NULL otherwise |
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197 | } |
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198 | } |
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199 | |
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200 | VariableExpr * getBaseVar( Expression *expr, int *levels ) { |
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201 | int dummy; |
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202 | if ( ! levels ) { levels = &dummy; } |
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203 | *levels = 0; |
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204 | |
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205 | while ( true ) { |
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206 | if ( VariableExpr *varExpr = dynamic_cast< VariableExpr* >( expr ) ) { |
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207 | return varExpr; |
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208 | } else if ( MemberExpr *memberExpr = dynamic_cast< MemberExpr* >( expr ) ) { |
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209 | expr = memberExpr->get_aggregate(); |
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210 | } else if ( AddressExpr *addressExpr = dynamic_cast< AddressExpr* >( expr ) ) { |
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211 | expr = addressExpr->get_arg(); |
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212 | } else if ( UntypedExpr *untypedExpr = dynamic_cast< UntypedExpr* >( expr ) ) { |
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213 | // look for compiler-inserted dereference operator |
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214 | NameExpr *fn = dynamic_cast< NameExpr* >( untypedExpr->get_function() ); |
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215 | if ( ! fn || fn->get_name() != std::string("*?") ) return 0; |
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216 | expr = *untypedExpr->begin_args(); |
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217 | } else if ( CommaExpr *commaExpr = dynamic_cast< CommaExpr* >( expr ) ) { |
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218 | // copy constructors insert comma exprs, look at second argument which contains the variable |
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219 | expr = commaExpr->get_arg2(); |
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220 | continue; |
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221 | } else if ( ConditionalExpr * condExpr = dynamic_cast< ConditionalExpr * >( expr ) ) { |
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222 | int lvl1; |
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223 | int lvl2; |
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224 | VariableExpr * var1 = getBaseVar( condExpr->get_arg2(), &lvl1 ); |
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225 | VariableExpr * var2 = getBaseVar( condExpr->get_arg3(), &lvl2 ); |
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226 | if ( lvl1 == lvl2 && var1 && var2 && var1->get_var() == var2->get_var() ) { |
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227 | *levels = lvl1; |
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228 | return var1; |
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229 | } |
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230 | break; |
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231 | } else break; |
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232 | |
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233 | ++(*levels); |
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234 | } |
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235 | |
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236 | return 0; |
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237 | } |
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238 | |
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239 | void addToTyVarMap( TypeDecl * tyVar, TyVarMap &tyVarMap ) { |
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240 | tyVarMap[ tyVar->get_name() ] = TypeDecl::Data{ tyVar }; |
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241 | } |
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242 | |
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243 | void makeTyVarMap( Type *type, TyVarMap &tyVarMap ) { |
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244 | for ( Type::ForallList::const_iterator tyVar = type->get_forall().begin(); tyVar != type->get_forall().end(); ++tyVar ) { |
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245 | assert( *tyVar ); |
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246 | addToTyVarMap( *tyVar, tyVarMap ); |
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247 | } |
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248 | if ( PointerType *pointer = dynamic_cast< PointerType* >( type ) ) { |
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249 | makeTyVarMap( pointer->get_base(), tyVarMap ); |
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250 | } |
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251 | } |
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252 | |
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253 | void printTyVarMap( std::ostream &os, const TyVarMap &tyVarMap ) { |
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254 | for ( TyVarMap::const_iterator i = tyVarMap.begin(); i != tyVarMap.end(); ++i ) { |
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255 | os << i->first << " (" << i->second << ") "; |
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256 | } // for |
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257 | os << std::endl; |
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258 | } |
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259 | |
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260 | } // namespace GenPoly |
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261 | |
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262 | // Local Variables: // |
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263 | // tab-width: 4 // |
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264 | // mode: c++ // |
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265 | // compile-command: "make install" // |
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266 | // End: // |
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