[298fe57] | 1 | // |
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| 2 | // Cforall Version 1.0.0 Copyright (C) 2018 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 | // HoistStruct.cpp -- Flattens nested type declarations. |
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| 8 | // |
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| 9 | // Author : Andrew Beach |
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| 10 | // Created On : Thr Apr 21 10:34:00 2022 |
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| 11 | // Last Modified By : Andrew Beach |
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| 12 | // Last Modified On : Thr Apr 21 10:34:00 2022 |
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| 13 | // Update Count : 0 |
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| 14 | // |
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| 15 | |
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| 16 | #include "Validate/HoistStruct.hpp" |
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| 17 | |
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[9feb34b] | 18 | #include <sstream> |
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| 19 | |
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[0658672] | 20 | #include "AST/DeclReplacer.hpp" |
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[298fe57] | 21 | #include "AST/Pass.hpp" |
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| 22 | #include "AST/TranslationUnit.hpp" |
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[0658672] | 23 | #include "AST/Vector.hpp" |
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[298fe57] | 24 | |
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| 25 | namespace Validate { |
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| 26 | |
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| 27 | namespace { |
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| 28 | |
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| 29 | bool shouldHoist( ast::Decl const * decl ) { |
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| 30 | return dynamic_cast< ast::StructDecl const * >( decl ) |
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| 31 | || dynamic_cast< ast::UnionDecl const * >( decl ) |
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[8b4faf6] | 32 | || dynamic_cast< ast::EnumDecl const * >( decl ) |
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[298fe57] | 33 | || dynamic_cast< ast::StaticAssertDecl const * >( decl ); |
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| 34 | } |
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| 35 | |
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| 36 | /* This pass also does some renaming and internal field alteration, but the |
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| 37 | * complex part is the actual hoisting. Hoisted declarations should always |
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| 38 | * appear before the declaration they are hoisted out of and if two types are |
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| 39 | * nested in the same declaration their order should not change. |
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| 40 | */ |
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| 41 | struct HoistStructCore final : |
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| 42 | public ast::WithDeclsToAdd<>, public ast::WithGuards { |
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| 43 | ast::StructDecl const * previsit( ast::StructDecl const * decl ); |
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| 44 | ast::StructDecl const * postvisit( ast::StructDecl const * decl ); |
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| 45 | ast::UnionDecl const * previsit( ast::UnionDecl const * decl ); |
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| 46 | ast::UnionDecl const * postvisit( ast::UnionDecl const * decl ); |
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| 47 | ast::StructInstType const * previsit( ast::StructInstType const * type ); |
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| 48 | ast::UnionInstType const * previsit( ast::UnionInstType const * type ); |
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| 49 | ast::EnumInstType const * previsit( ast::EnumInstType const * type ); |
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| 50 | |
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| 51 | private: |
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| 52 | template<typename AggrDecl> |
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| 53 | AggrDecl const * preAggregate( AggrDecl const * ); |
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| 54 | template<typename AggrDecl> |
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| 55 | AggrDecl const * postAggregate( AggrDecl const * ); |
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[0658672] | 56 | template<typename InstType> |
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| 57 | InstType const * preCollectionInstType( InstType const * type ); |
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[298fe57] | 58 | |
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| 59 | ast::AggregateDecl const * parent = nullptr; |
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| 60 | }; |
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| 61 | |
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| 62 | void qualifiedName( ast::AggregateDecl const * decl, std::ostringstream & ss ) { |
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| 63 | if ( decl->parent ) { |
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| 64 | qualifiedName( decl->parent, ss ); |
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| 65 | } |
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| 66 | ss << "__" << decl->name; |
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| 67 | } |
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| 68 | |
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| 69 | std::string qualifiedName( ast::AggregateDecl const * decl ) { |
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| 70 | std::ostringstream ss; |
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| 71 | qualifiedName( decl, ss ); |
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| 72 | return ss.str(); |
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| 73 | } |
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| 74 | |
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[0658672] | 75 | void extendParams( ast::vector<ast::TypeDecl> & dstParams, |
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| 76 | ast::vector<ast::TypeDecl> const & srcParams ) { |
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| 77 | if ( srcParams.empty() ) return; |
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| 78 | |
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| 79 | ast::DeclReplacer::TypeMap newToOld; |
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| 80 | ast::vector<ast::TypeDecl> params; |
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| 81 | for ( ast::ptr<ast::TypeDecl> const & srcParam : srcParams ) { |
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| 82 | ast::TypeDecl * dstParam = ast::deepCopy( srcParam.get() ); |
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| 83 | dstParam->init = nullptr; |
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| 84 | newToOld.emplace( srcParam, dstParam ); |
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| 85 | for ( auto assertion : dstParam->assertions ) { |
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| 86 | assertion = ast::DeclReplacer::replace( assertion, newToOld ); |
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| 87 | } |
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| 88 | params.emplace_back( dstParam ); |
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| 89 | } |
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| 90 | spliceBegin( dstParams, params ); |
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| 91 | } |
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| 92 | |
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[298fe57] | 93 | template<typename AggrDecl> |
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| 94 | AggrDecl const * HoistStructCore::preAggregate( AggrDecl const * decl ) { |
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| 95 | if ( parent ) { |
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| 96 | auto mut = ast::mutate( decl ); |
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| 97 | mut->parent = parent; |
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| 98 | mut->name = qualifiedName( mut ); |
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[0658672] | 99 | extendParams( mut->params, parent->params ); |
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| 100 | decl = mut; |
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[298fe57] | 101 | } |
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[0658672] | 102 | GuardValue( parent ) = decl; |
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| 103 | return decl; |
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[298fe57] | 104 | } |
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| 105 | |
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| 106 | template<typename AggrDecl> |
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| 107 | AggrDecl const * HoistStructCore::postAggregate( AggrDecl const * decl ) { |
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| 108 | auto mut = ast::mutate( decl ); |
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| 109 | for ( auto it = mut->members.begin() ; it != mut->members.end() ; ) { |
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| 110 | if ( shouldHoist( *it ) ) { |
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| 111 | // This is the place where the actual hoisting happens. |
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| 112 | declsToAddBefore.push_back( it->get() ); |
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| 113 | it = mut->members.erase( it ); |
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| 114 | } else { |
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| 115 | ++it; |
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| 116 | } |
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| 117 | } |
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| 118 | return mut; |
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| 119 | } |
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| 120 | |
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| 121 | ast::StructDecl const * HoistStructCore::previsit( ast::StructDecl const * decl ) { |
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| 122 | return preAggregate( decl ); |
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| 123 | } |
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| 124 | |
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| 125 | ast::StructDecl const * HoistStructCore::postvisit( ast::StructDecl const * decl ) { |
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| 126 | return postAggregate( decl ); |
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| 127 | } |
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| 128 | |
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| 129 | ast::UnionDecl const * HoistStructCore::previsit( ast::UnionDecl const * decl ) { |
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| 130 | return preAggregate( decl ); |
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| 131 | } |
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| 132 | |
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| 133 | ast::UnionDecl const * HoistStructCore::postvisit( ast::UnionDecl const * decl ) { |
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| 134 | return postAggregate( decl ); |
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| 135 | } |
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| 136 | |
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[0658672] | 137 | ast::AggregateDecl const * commonParent( |
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| 138 | ast::AggregateDecl const * lhs, ast::AggregateDecl const * rhs ) { |
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| 139 | for ( auto outer = lhs ; outer ; outer = outer->parent ) { |
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| 140 | for ( auto inner = rhs ; inner ; inner = inner->parent ) { |
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| 141 | if ( outer == inner ) { |
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| 142 | return outer; |
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| 143 | } |
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| 144 | } |
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| 145 | } |
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| 146 | return nullptr; |
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| 147 | } |
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| 148 | |
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| 149 | template<typename InstType> |
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| 150 | InstType const * HoistStructCore::preCollectionInstType( InstType const * type ) { |
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[fc1a3e2] | 151 | if ( !type->base->parent ) return type; |
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| 152 | if ( type->base->params.empty() ) return type; |
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| 153 | |
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| 154 | InstType * mut = ast::mutate( type ); |
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| 155 | ast::AggregateDecl const * parent = |
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| 156 | commonParent( this->parent, mut->base->parent ); |
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| 157 | assert( parent ); |
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| 158 | |
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| 159 | std::vector<ast::ptr<ast::Expr>> args; |
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| 160 | for ( const ast::ptr<ast::TypeDecl> & param : parent->params ) { |
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| 161 | args.emplace_back( new ast::TypeExpr( param->location, |
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| 162 | new ast::TypeInstType( param ) |
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| 163 | ) ); |
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| 164 | } |
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| 165 | spliceBegin( mut->params, args ); |
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| 166 | return mut; |
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[0658672] | 167 | } |
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| 168 | |
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[298fe57] | 169 | template<typename InstType> |
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| 170 | InstType const * preInstType( InstType const * type ) { |
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| 171 | assert( type->base ); |
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| 172 | auto mut = ast::mutate( type ); |
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| 173 | mut->name = mut->base->name; |
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| 174 | return mut; |
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| 175 | } |
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| 176 | |
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| 177 | ast::StructInstType const * HoistStructCore::previsit( ast::StructInstType const * type ) { |
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[0658672] | 178 | return preInstType( preCollectionInstType( type ) ); |
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[298fe57] | 179 | } |
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| 180 | |
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| 181 | ast::UnionInstType const * HoistStructCore::previsit( ast::UnionInstType const * type ) { |
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[0658672] | 182 | return preInstType( preCollectionInstType( type ) ); |
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[298fe57] | 183 | } |
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| 184 | |
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| 185 | ast::EnumInstType const * HoistStructCore::previsit( ast::EnumInstType const * type ) { |
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| 186 | return preInstType( type ); |
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| 187 | } |
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| 188 | |
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| 189 | } // namespace |
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| 190 | |
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| 191 | void hoistStruct( ast::TranslationUnit & translationUnit ) { |
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| 192 | ast::Pass<HoistStructCore>::run( translationUnit ); |
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| 193 | } |
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| 194 | |
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| 195 | } // namespace Validate |
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| 196 | |
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| 197 | // Local Variables: // |
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| 198 | // tab-width: 4 // |
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| 199 | // mode: c++ // |
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| 200 | // compile-command: "make install" // |
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| 201 | // End: // |
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