[1c01c58] | 1 | // |
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| 2 | // Cforall Version 1.0.0 Copyright (C) 2016 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 | // Tables.cc -- |
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| 8 | // |
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| 9 | // Author : Andrew Beach |
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| 10 | // Created On : Mon Aug 31 11:11:00 2020 |
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| 11 | // Last Modified By : Andrew Beach |
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| 12 | // Last Modified On : Tue Sep 3 14:56:00 2020 |
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| 13 | // Update Count : 0 |
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| 14 | // |
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| 15 | |
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| 16 | #include <SynTree/Declaration.h> |
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| 17 | #include <SynTree/Expression.h> |
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| 18 | #include <SynTree/Type.h> |
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| 19 | |
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| 20 | namespace Virtual { |
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| 21 | |
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| 22 | std::string vtableTypeName( std::string const & name ) { |
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| 23 | return name + "_vtable"; |
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| 24 | } |
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| 25 | |
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| 26 | std::string instanceName( std::string const & name ) { |
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| 27 | return std::string("_") + name + "_instance"; |
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| 28 | } |
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| 29 | |
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| 30 | std::string vtableInstanceName( std::string const & name ) { |
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| 31 | return instanceName( vtableTypeName( name ) ); |
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| 32 | } |
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| 33 | |
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| 34 | bool isVTableInstanceName( std::string const & name ) { |
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| 35 | // There are some delicate length calculations here. |
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| 36 | return 17 < name.size() && '_' == name[0] && |
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| 37 | std::string("_vtable_instance") == name.substr(1, name.size() - 17); |
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| 38 | } |
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| 39 | |
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| 40 | // Fuse base polymorphic declaration and forall arguments into a new type. |
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| 41 | static StructInstType * vtableInstType( |
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| 42 | StructDecl * polyDecl, std::list< Expression * > && parameters ) { |
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| 43 | assert( parameters.size() == polyDecl->parameters.size() ); |
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| 44 | StructInstType * type = new StructInstType( |
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| 45 | Type::Qualifiers( /* Type::Const */ ), polyDecl ); |
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| 46 | type->parameters = std::move( parameters ); |
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| 47 | return type; |
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| 48 | } |
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| 49 | |
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| 50 | static ObjectDecl * makeVtableDeclaration( |
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| 51 | StructInstType * type, Initializer * init ) { |
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| 52 | std::string const & name = instanceName( type->name ); |
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| 53 | Type::StorageClasses storage = noStorageClasses; |
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| 54 | if ( nullptr == init ) { |
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| 55 | storage.is_extern = true; |
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| 56 | } |
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| 57 | return new ObjectDecl( |
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| 58 | name, |
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| 59 | storage, |
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| 60 | LinkageSpec::Cforall, |
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| 61 | nullptr, |
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| 62 | type, |
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| 63 | init |
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| 64 | ); |
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| 65 | } |
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| 66 | |
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| 67 | ObjectDecl * makeVtableForward( StructInstType * type ) { |
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| 68 | return makeVtableDeclaration( type, nullptr ); |
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| 69 | } |
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| 70 | |
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| 71 | ObjectDecl * makeVtableForward( |
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| 72 | StructDecl * polyDecl, std::list< Expression * > && parameters ) { |
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| 73 | return makeVtableForward( vtableInstType( polyDecl, std::move( parameters ) ) ); |
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| 74 | } |
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| 75 | |
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| 76 | ObjectDecl * makeVtableInstance( |
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| 77 | StructInstType * vtableType, Type * vobject_type, Initializer * init ) { |
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| 78 | StructDecl * vtableStruct = vtableType->baseStruct; |
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| 79 | // Build the initialization |
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| 80 | if ( nullptr == init ) { |
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| 81 | std::list< Initializer * > inits; |
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| 82 | |
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| 83 | // This is going to have to be run before the resolver to connect expressions. |
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| 84 | for ( auto field : vtableStruct->members ) { |
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| 85 | if ( std::string( "parent" ) == field->name ) { |
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| 86 | // This will not work with polymorphic state. |
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| 87 | auto oField = strict_dynamic_cast< ObjectDecl * >( field ); |
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| 88 | auto fieldType = strict_dynamic_cast< PointerType * >( oField->type ); |
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| 89 | auto parentType = strict_dynamic_cast< StructInstType * >( fieldType->base ); |
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| 90 | std::string const & parentInstance = instanceName( parentType->name ); |
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| 91 | inits.push_back( |
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| 92 | new SingleInit( new AddressExpr( new NameExpr( parentInstance ) ) ) ); |
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| 93 | } else if ( std::string( "size" ) == field->name ) { |
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| 94 | inits.push_back( new SingleInit( new SizeofExpr( vobject_type->clone() ) ) ); |
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| 95 | } else if ( std::string( "align" ) == field->name ) { |
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| 96 | inits.push_back( new SingleInit( new AlignofExpr( vobject_type->clone() ) ) ); |
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| 97 | } else { |
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| 98 | inits.push_back( new SingleInit( new NameExpr( field->name ) ) ); |
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| 99 | } |
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| 100 | } |
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| 101 | init = new ListInit( inits ); |
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| 102 | // This should initialize everything except the parent pointer, the |
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| 103 | // size-of and align-of fields. These should be inserted. |
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| 104 | } else { |
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| 105 | assert(false); |
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| 106 | } |
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| 107 | return makeVtableDeclaration( vtableType, init ); |
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| 108 | } |
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| 109 | |
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| 110 | ObjectDecl * makeVtableInstance( |
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| 111 | StructDecl * polyDecl, std::list< Expression * > && parameters, |
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| 112 | Type * vobject, Initializer * init ) { |
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| 113 | return makeVtableInstance( |
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| 114 | vtableInstType( polyDecl, std::move( parameters ) ), vobject, init ); |
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| 115 | } |
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| 116 | |
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| 117 | } |
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