[51587aa] | 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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[540de412] | 7 | // GenPoly.cc -- |
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[51587aa] | 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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[540de412] | 11 | // Last Modified By : Rob Schluntz |
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[d9f1b2d] | 12 | // Last Modified On : Wed May 25 13:39:21 2016 |
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[4389966] | 13 | // Update Count : 13 |
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[51587aa] | 14 | // |
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[51b7345] | 15 | |
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| 16 | #include "GenPoly.h" |
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[ffad73a] | 17 | |
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| 18 | #include "SynTree/Expression.h" |
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[51b7345] | 19 | #include "SynTree/Type.h" |
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| 20 | |
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[b1a6d6b] | 21 | #include <iostream> |
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| 22 | using namespace std; |
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[51b7345] | 23 | |
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| 24 | namespace GenPoly { |
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[e56cfdb0] | 25 | bool needsAdapter( FunctionType *adaptee, const TyVarMap &tyVars ) { |
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[ffad73a] | 26 | if ( ! adaptee->get_returnVals().empty() && isPolyType( adaptee->get_returnVals().front()->get_type(), tyVars ) ) { |
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[e56cfdb0] | 27 | return true; |
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| 28 | } // if |
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| 29 | for ( std::list< DeclarationWithType* >::const_iterator innerArg = adaptee->get_parameters().begin(); innerArg != adaptee->get_parameters().end(); ++innerArg ) { |
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[ffad73a] | 30 | if ( isPolyType( (*innerArg)->get_type(), tyVars ) ) { |
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[e56cfdb0] | 31 | return true; |
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| 32 | } // if |
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| 33 | } // for |
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| 34 | return false; |
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| 35 | } |
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| 36 | |
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[aadc9a4] | 37 | ReferenceToType *isPolyRet( FunctionType *function ) { |
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[e56cfdb0] | 38 | if ( ! function->get_returnVals().empty() ) { |
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[bfae637] | 39 | TyVarMap forallTypes( (TypeDecl::Kind)-1 ); |
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[aadc9a4] | 40 | makeTyVarMap( function, forallTypes ); |
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| 41 | return (ReferenceToType*)isPolyType( function->get_returnVals().front()->get_type(), forallTypes ); |
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[e56cfdb0] | 42 | } // if |
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[aadc9a4] | 43 | return 0; |
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[01aeade] | 44 | } |
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[b1a6d6b] | 45 | |
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[ffad73a] | 46 | namespace { |
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[0f889a77] | 47 | /// Checks a parameter list for polymorphic parameters; will substitute according to env if present |
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| 48 | bool hasPolyParams( std::list< Expression* >& params, const TypeSubstitution *env ) { |
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| 49 | for ( std::list< Expression* >::iterator param = params.begin(); param != params.end(); ++param ) { |
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| 50 | TypeExpr *paramType = dynamic_cast< TypeExpr* >( *param ); |
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| 51 | assert(paramType && "Aggregate parameters should be type expressions"); |
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| 52 | if ( isPolyType( paramType->get_type(), env ) ) return true; |
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| 53 | } |
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| 54 | return false; |
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| 55 | } |
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| 56 | |
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| 57 | /// Checks a parameter list for polymorphic parameters from tyVars; will substitute according to env if present |
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[ffad73a] | 58 | bool hasPolyParams( std::list< Expression* >& params, const TyVarMap &tyVars, const TypeSubstitution *env ) { |
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| 59 | for ( std::list< Expression* >::iterator param = params.begin(); param != params.end(); ++param ) { |
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| 60 | TypeExpr *paramType = dynamic_cast< TypeExpr* >( *param ); |
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| 61 | assert(paramType && "Aggregate parameters should be type expressions"); |
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| 62 | if ( isPolyType( paramType->get_type(), tyVars, env ) ) return true; |
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| 63 | } |
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| 64 | return false; |
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| 65 | } |
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[83de11e] | 66 | |
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[e24955a] | 67 | /// Replaces a TypeInstType by its referrent in the environment, if applicable |
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| 68 | Type* replaceTypeInst( Type* type, const TypeSubstitution* env ) { |
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| 69 | if ( ! env ) return type; |
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| 70 | if ( TypeInstType *typeInst = dynamic_cast< TypeInstType* >( type ) ) { |
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| 71 | Type *newType = env->lookup( typeInst->get_name() ); |
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| 72 | if ( newType ) return newType; |
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| 73 | } |
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| 74 | return type; |
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| 75 | } |
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[ffad73a] | 76 | } |
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[0f889a77] | 77 | |
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| 78 | Type *isPolyType( Type *type, const TypeSubstitution *env ) { |
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[e24955a] | 79 | type = replaceTypeInst( type, env ); |
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[83de11e] | 80 | |
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[0f889a77] | 81 | if ( TypeInstType *typeInst = dynamic_cast< TypeInstType * >( type ) ) { |
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| 82 | return type; |
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| 83 | } else if ( StructInstType *structType = dynamic_cast< StructInstType* >( type ) ) { |
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| 84 | if ( hasPolyParams( structType->get_parameters(), env ) ) return type; |
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| 85 | } else if ( UnionInstType *unionType = dynamic_cast< UnionInstType* >( type ) ) { |
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| 86 | if ( hasPolyParams( unionType->get_parameters(), env ) ) return type; |
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| 87 | } |
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| 88 | return 0; |
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| 89 | } |
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[540de412] | 90 | |
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[ffad73a] | 91 | Type *isPolyType( Type *type, const TyVarMap &tyVars, const TypeSubstitution *env ) { |
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[e24955a] | 92 | type = replaceTypeInst( type, env ); |
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[83de11e] | 93 | |
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[e56cfdb0] | 94 | if ( TypeInstType *typeInst = dynamic_cast< TypeInstType * >( type ) ) { |
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[ffad73a] | 95 | if ( tyVars.find( typeInst->get_name() ) != tyVars.end() ) { |
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| 96 | return type; |
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[0f889a77] | 97 | } |
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[ffad73a] | 98 | } else if ( StructInstType *structType = dynamic_cast< StructInstType* >( type ) ) { |
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| 99 | if ( hasPolyParams( structType->get_parameters(), tyVars, env ) ) return type; |
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| 100 | } else if ( UnionInstType *unionType = dynamic_cast< UnionInstType* >( type ) ) { |
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| 101 | if ( hasPolyParams( unionType->get_parameters(), tyVars, env ) ) return type; |
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| 102 | } |
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| 103 | return 0; |
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[01aeade] | 104 | } |
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[b1a6d6b] | 105 | |
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[0f889a77] | 106 | Type *isPolyPtr( Type *type, const TypeSubstitution *env ) { |
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[e24955a] | 107 | type = replaceTypeInst( type, env ); |
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[83de11e] | 108 | |
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[0f889a77] | 109 | if ( PointerType *ptr = dynamic_cast< PointerType *>( type ) ) { |
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| 110 | return isPolyType( ptr->get_base(), env ); |
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[e24955a] | 111 | } |
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[0f889a77] | 112 | return 0; |
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| 113 | } |
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[540de412] | 114 | |
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[ffad73a] | 115 | Type *isPolyPtr( Type *type, const TyVarMap &tyVars, const TypeSubstitution *env ) { |
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[e24955a] | 116 | type = replaceTypeInst( type, env ); |
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[83de11e] | 117 | |
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[ffad73a] | 118 | if ( PointerType *ptr = dynamic_cast< PointerType *>( type ) ) { |
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| 119 | return isPolyType( ptr->get_base(), tyVars, env ); |
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[e24955a] | 120 | } |
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[ffad73a] | 121 | return 0; |
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[bdf1954] | 122 | } |
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| 123 | |
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[8488c715] | 124 | Type * hasPolyBase( Type *type, int *levels, const TypeSubstitution *env ) { |
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| 125 | int dummy; |
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| 126 | if ( ! levels ) { levels = &dummy; } |
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| 127 | *levels = 0; |
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| 128 | |
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| 129 | while ( true ) { |
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[e24955a] | 130 | type = replaceTypeInst( type, env ); |
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[83de11e] | 131 | |
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[8488c715] | 132 | if ( PointerType *ptr = dynamic_cast< PointerType *>( type ) ) { |
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| 133 | type = ptr->get_base(); |
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| 134 | ++(*levels); |
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| 135 | } else break; |
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[05d47278] | 136 | } |
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| 137 | |
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| 138 | return isPolyType( type, env ); |
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| 139 | } |
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[540de412] | 140 | |
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[8488c715] | 141 | Type * hasPolyBase( Type *type, const TyVarMap &tyVars, int *levels, const TypeSubstitution *env ) { |
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| 142 | int dummy; |
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| 143 | if ( ! levels ) { levels = &dummy; } |
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| 144 | *levels = 0; |
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| 145 | |
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| 146 | while ( true ) { |
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[e24955a] | 147 | type = replaceTypeInst( type, env ); |
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[83de11e] | 148 | |
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[8488c715] | 149 | if ( PointerType *ptr = dynamic_cast< PointerType *>( type ) ) { |
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| 150 | type = ptr->get_base(); |
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| 151 | ++(*levels); |
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| 152 | } else break; |
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[05d47278] | 153 | } |
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| 154 | |
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| 155 | return isPolyType( type, tyVars, env ); |
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| 156 | } |
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| 157 | |
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[7754cde] | 158 | FunctionType * getFunctionType( Type *ty ) { |
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| 159 | PointerType *ptrType; |
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| 160 | if ( ( ptrType = dynamic_cast< PointerType* >( ty ) ) ) { |
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| 161 | return dynamic_cast< FunctionType* >( ptrType->get_base() ); // pointer if FunctionType, NULL otherwise |
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| 162 | } else { |
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| 163 | return dynamic_cast< FunctionType* >( ty ); // pointer if FunctionType, NULL otherwise |
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| 164 | } |
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| 165 | } |
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| 166 | |
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[8488c715] | 167 | VariableExpr * getBaseVar( Expression *expr, int *levels ) { |
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| 168 | int dummy; |
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| 169 | if ( ! levels ) { levels = &dummy; } |
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| 170 | *levels = 0; |
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| 171 | |
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| 172 | while ( true ) { |
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| 173 | if ( VariableExpr *varExpr = dynamic_cast< VariableExpr* >( expr ) ) { |
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| 174 | return varExpr; |
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[d9f1b2d] | 175 | } else if ( MemberExpr *memberExpr = dynamic_cast< MemberExpr* >( expr ) ) { |
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| 176 | expr = memberExpr->get_aggregate(); |
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[8488c715] | 177 | } else if ( AddressExpr *addressExpr = dynamic_cast< AddressExpr* >( expr ) ) { |
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| 178 | expr = addressExpr->get_arg(); |
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| 179 | } else if ( UntypedExpr *untypedExpr = dynamic_cast< UntypedExpr* >( expr ) ) { |
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| 180 | // look for compiler-inserted dereference operator |
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| 181 | NameExpr *fn = dynamic_cast< NameExpr* >( untypedExpr->get_function() ); |
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| 182 | if ( ! fn || fn->get_name() != std::string("*?") ) return 0; |
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| 183 | expr = *untypedExpr->begin_args(); |
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[540de412] | 184 | } else if ( CommaExpr *commaExpr = dynamic_cast< CommaExpr* >( expr ) ) { |
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| 185 | // copy constructors insert comma exprs, look at second argument which contains the variable |
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| 186 | expr = commaExpr->get_arg2(); |
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| 187 | continue; |
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[8488c715] | 188 | } else break; |
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| 189 | |
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| 190 | ++(*levels); |
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| 191 | } |
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| 192 | |
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| 193 | return 0; |
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[05d47278] | 194 | } |
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| 195 | |
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[aadc9a4] | 196 | void makeTyVarMap( Type *type, TyVarMap &tyVarMap ) { |
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| 197 | for ( std::list< TypeDecl* >::const_iterator tyVar = type->get_forall().begin(); tyVar != type->get_forall().end(); ++tyVar ) { |
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| 198 | assert( *tyVar ); |
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| 199 | tyVarMap[ (*tyVar)->get_name() ] = (*tyVar)->get_kind(); |
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| 200 | } |
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| 201 | if ( PointerType *pointer = dynamic_cast< PointerType* >( type ) ) { |
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| 202 | makeTyVarMap( pointer->get_base(), tyVarMap ); |
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| 203 | } |
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| 204 | } |
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[540de412] | 205 | |
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[01aeade] | 206 | void printTyVarMap( std::ostream &os, const TyVarMap &tyVarMap ) { |
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| 207 | for ( TyVarMap::const_iterator i = tyVarMap.begin(); i != tyVarMap.end(); ++i ) { |
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| 208 | os << i->first << " (" << i->second << ") "; |
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| 209 | } // for |
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| 210 | os << std::endl; |
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| 211 | } |
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[ffad73a] | 212 | |
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[51b7345] | 213 | } // namespace GenPoly |
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[01aeade] | 214 | |
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[51587aa] | 215 | // Local Variables: // |
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| 216 | // tab-width: 4 // |
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| 217 | // mode: c++ // |
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| 218 | // compile-command: "make install" // |
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| 219 | // End: // |
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