[9490621] | 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 | // ForallPointerDecay.cpp -- |
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| 8 | // |
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| 9 | // Author : Andrew Beach |
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| 10 | // Created On : Tue Dec 7 16:15:00 2021 |
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| 11 | // Last Modified By : Andrew Beach |
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[298fe57] | 12 | // Last Modified On : Sat Apr 23 13:10:00 2022 |
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| 13 | // Update Count : 1 |
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[9490621] | 14 | // |
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| 15 | |
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| 16 | #include "ForallPointerDecay.hpp" |
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| 17 | |
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| 18 | #include "AST/Copy.hpp" |
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| 19 | #include "AST/Decl.hpp" |
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| 20 | #include "AST/DeclReplacer.hpp" |
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| 21 | #include "AST/Pass.hpp" |
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| 22 | #include "CodeGen/OperatorTable.h" |
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| 23 | #include "Common/CodeLocation.h" |
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[9feb34b] | 24 | #include "Common/ToString.hpp" |
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[9490621] | 25 | #include "SymTab/FixFunction.h" |
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| 26 | |
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| 27 | #include "AST/Print.hpp" |
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| 28 | |
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| 29 | namespace Validate { |
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| 30 | |
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| 31 | namespace { |
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| 32 | |
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| 33 | // Create a function type only using information on the FunctionDecl. |
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| 34 | ast::FunctionType * makeFuncType( const ast::FunctionDecl * decl ) { |
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| 35 | auto type = new ast::FunctionType( decl->type->isVarArgs ); |
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| 36 | for ( auto & param : decl->params ) { |
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| 37 | type->params.emplace_back( param->get_type() ); |
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| 38 | } |
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| 39 | for ( auto & ret : decl->returns ) { |
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| 40 | type->returns.emplace_back( ret->get_type() ); |
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| 41 | } |
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| 42 | for ( auto & type_param : decl->type_params ) { |
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| 43 | type->forall.emplace_back( |
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[b230091] | 44 | new ast::TypeInstType( type_param ) ); |
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[9490621] | 45 | } |
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| 46 | for ( auto & assertion : decl->assertions ) { |
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| 47 | type->assertions.emplace_back( new ast::VariableExpr( |
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| 48 | assertion->location, assertion ) ); |
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| 49 | } |
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| 50 | return type; |
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| 51 | } |
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| 52 | |
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| 53 | template<typename T> |
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| 54 | void append( std::vector<T> & dst, std::vector<T> & src ) { |
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| 55 | dst.reserve( dst.size() + src.size() ); |
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| 56 | for ( auto el : src ) { |
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| 57 | dst.emplace_back( std::move( el ) ); |
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| 58 | } |
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| 59 | src.clear(); |
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| 60 | } |
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| 61 | |
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| 62 | // Component Passes: |
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| 63 | /// Expand assertions from a trait instance, |
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| 64 | /// performing appropriate type variable substitutions. |
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| 65 | struct TraitExpander final { |
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| 66 | using AssertionList = std::vector<ast::ptr<ast::DeclWithType>>; |
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| 67 | |
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| 68 | static AssertionList expandTrait( const ast::TraitInstType * inst ) { |
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| 69 | assertf( inst->base, "Trait instance not linked to base trait: %s", |
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| 70 | toCString( inst ) ); |
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| 71 | AssertionList assertions; |
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| 72 | // Substitute trait decl parameters for instance parameters. |
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[4f6dda0] | 73 | ast::TypeSubstitution sub( inst->base->params, inst->params ); |
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[9490621] | 74 | for ( const ast::ptr<ast::Decl> & decl : inst->base->members ) { |
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| 75 | ast::ptr<ast::DeclWithType> copy = |
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| 76 | ast::deepCopy( decl.strict_as<ast::DeclWithType>() ); |
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| 77 | |
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| 78 | int count = sub.apply( copy ); |
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| 79 | (void)count; |
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| 80 | |
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[a556492] | 81 | // Update the type (type substution does not seem to cover it). |
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[9490621] | 82 | if ( auto func = copy.as<ast::FunctionDecl>() ) { |
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| 83 | auto mut = ast::mutate( func ); |
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| 84 | mut->type = makeFuncType( func ); |
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| 85 | copy = mut; |
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| 86 | } |
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| 87 | assertions.push_back( copy ); |
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| 88 | } |
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| 89 | return assertions; |
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| 90 | } |
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| 91 | |
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| 92 | static AssertionList expandAssertions( const AssertionList & old ) { |
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| 93 | AssertionList assertions; |
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| 94 | for ( const ast::ptr<ast::DeclWithType> & decl : old ) { |
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| 95 | if ( auto traitInst = dynamic_cast<const ast::TraitInstType *>( |
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| 96 | decl->get_type() ) ) { |
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| 97 | auto moreAsserts = expandTrait( traitInst ); |
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| 98 | append( assertions, moreAsserts ); |
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| 99 | } else { |
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| 100 | assertions.push_back( decl ); |
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| 101 | } |
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| 102 | } |
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| 103 | return assertions; |
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| 104 | } |
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| 105 | |
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| 106 | using TypeDeclVec = std::vector<ast::ptr<ast::TypeDecl>>; |
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| 107 | |
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| 108 | static TypeDeclVec expandTypeDecls( const TypeDeclVec & old ) { |
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| 109 | TypeDeclVec typeDecls; |
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| 110 | for ( const ast::TypeDecl * typeDecl : old ) { |
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| 111 | typeDecls.push_back( ast::mutate_field( typeDecl, |
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| 112 | &ast::TypeDecl::assertions, |
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| 113 | expandAssertions( typeDecl->assertions ) ) ); |
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| 114 | } |
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| 115 | return typeDecls; |
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| 116 | } |
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| 117 | |
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| 118 | const ast::FunctionDecl * postvisit( const ast::FunctionDecl * decl ) { |
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| 119 | if ( decl->assertions.empty() ) { |
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| 120 | return decl; |
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| 121 | } |
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| 122 | auto mut = ast::mutate( decl ); |
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[51b8582] | 123 | mut->assertions = expandAssertions( decl->assertions ); |
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[a556492] | 124 | // Update the assertion list on the type as well. |
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[9490621] | 125 | auto mutType = ast::mutate( mut->type.get() ); |
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| 126 | mutType->assertions.clear(); |
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| 127 | for ( auto & assertion : mut->assertions ) { |
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| 128 | mutType->assertions.emplace_back( |
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| 129 | new ast::VariableExpr( mut->location, assertion ) ); |
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| 130 | } |
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| 131 | mut->type = mutType; |
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| 132 | return mut; |
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| 133 | } |
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| 134 | |
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| 135 | const ast::StructDecl * previsit( const ast::StructDecl * decl ) { |
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| 136 | if ( decl->params.empty() ) { |
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| 137 | return decl; |
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| 138 | } |
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| 139 | return ast::mutate_field( decl, &ast::StructDecl::params, |
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[51b8582] | 140 | expandTypeDecls( decl->params ) ); |
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[9490621] | 141 | } |
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| 142 | |
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| 143 | const ast::UnionDecl * previsit( const ast::UnionDecl * decl ) { |
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| 144 | if ( decl->params.empty() ) { |
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| 145 | return decl; |
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| 146 | } |
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| 147 | return ast::mutate_field( decl, &ast::UnionDecl::params, |
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[51b8582] | 148 | expandTypeDecls( decl->params ) ); |
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[9490621] | 149 | } |
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| 150 | }; |
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| 151 | |
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| 152 | std::vector<ast::ptr<ast::DeclWithType>> fixAssertionList( |
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| 153 | const ast::ParseNode * node, |
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| 154 | const std::vector<ast::ptr<ast::DeclWithType>> & assertions ) { |
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| 155 | std::vector<ast::ptr<ast::DeclWithType>> ret; |
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| 156 | for ( const auto & assn : assertions ) { |
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| 157 | bool isVoid = false; |
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| 158 | ret.push_back( SymTab::fixFunction( assn, isVoid ) ); |
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| 159 | if ( isVoid ) { |
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| 160 | SemanticError( node->location, node, |
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| 161 | "invalid type void in assertion of function " ); |
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| 162 | } |
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| 163 | } |
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| 164 | return ret; |
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| 165 | } |
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| 166 | |
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| 167 | std::vector<ast::ptr<ast::TypeDecl>> fixTypeDeclList( |
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| 168 | const ast::ParseNode * node, |
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| 169 | const std::vector<ast::ptr<ast::TypeDecl>> & type_params ) { |
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| 170 | std::vector<ast::ptr<ast::TypeDecl>> ret; |
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| 171 | ret.reserve( type_params.size() ); |
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| 172 | for ( const ast::TypeDecl * type_param : type_params ) { |
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| 173 | auto mutParam = ast::mutate( type_param ); |
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| 174 | mutParam->assertions = fixAssertionList( node, mutParam->assertions ); |
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| 175 | ret.push_back( mutParam ); |
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| 176 | } |
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| 177 | return ret; |
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| 178 | } |
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| 179 | |
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| 180 | struct AssertionFunctionFixer final { |
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| 181 | const ast::FunctionDecl * previsit( const ast::FunctionDecl * decl ) { |
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| 182 | if ( decl->assertions.empty() ) { |
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| 183 | return decl; |
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| 184 | } |
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| 185 | return ast::mutate_field( decl, &ast::FunctionDecl::assertions, |
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| 186 | fixAssertionList( decl, decl->assertions ) ); |
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| 187 | } |
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| 188 | |
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| 189 | const ast::StructDecl * previsit( const ast::StructDecl * decl ) { |
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| 190 | if ( decl->params.empty() ) { |
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| 191 | return decl; |
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| 192 | } |
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| 193 | return ast::mutate_field( decl, &ast::StructDecl::params, |
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| 194 | fixTypeDeclList( decl, decl->params ) ); |
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| 195 | } |
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| 196 | |
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| 197 | const ast::UnionDecl * previsit( const ast::UnionDecl * decl ) { |
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| 198 | if ( decl->params.empty() ) { |
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| 199 | return decl; |
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| 200 | } |
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| 201 | return ast::mutate_field( decl, &ast::UnionDecl::params, |
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| 202 | fixTypeDeclList( decl, decl->params ) ); |
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| 203 | } |
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| 204 | }; |
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| 205 | |
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| 206 | struct OberatorChecker final { |
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| 207 | void previsit( const ast::ObjectDecl * obj ) { |
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| 208 | if ( CodeGen::isOperator( obj->name ) ) { |
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| 209 | auto type = obj->type->stripDeclarator(); |
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| 210 | if ( ! dynamic_cast< const ast::FunctionType * >( type ) ) { |
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| 211 | SemanticError( obj->location, |
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| 212 | toCString( "operator ", obj->name.c_str(), " is not " |
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| 213 | "a function or function pointer." ) ); |
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| 214 | } |
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| 215 | } |
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| 216 | } |
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| 217 | }; |
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| 218 | |
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| 219 | struct UniqueFixCore final { |
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| 220 | const ast::DeclWithType * postvisit( const ast::DeclWithType * decl ) { |
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| 221 | if ( decl->uniqueId ) { |
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| 222 | return decl; |
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| 223 | } else { |
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| 224 | auto mut = ast::mutate( decl ); |
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| 225 | mut->fixUniqueId(); |
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| 226 | return mut; |
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| 227 | } |
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| 228 | } |
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| 229 | }; |
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| 230 | |
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| 231 | } // namespace |
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| 232 | |
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| 233 | void decayForallPointers( ast::TranslationUnit & transUnit ) { |
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| 234 | ast::Pass<TraitExpander>::run( transUnit ); |
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| 235 | ast::Pass<AssertionFunctionFixer>::run( transUnit ); |
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| 236 | ast::Pass<OberatorChecker>::run( transUnit ); |
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| 237 | ast::Pass<UniqueFixCore>::run( transUnit ); |
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| 238 | } |
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| 239 | |
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[298fe57] | 240 | std::vector<ast::ptr<ast::DeclWithType>> expandAssertions( |
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| 241 | std::vector<ast::ptr<ast::DeclWithType>> const & old ) { |
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| 242 | return TraitExpander::expandAssertions( old ); |
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| 243 | } |
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| 244 | |
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[9490621] | 245 | } // namespace Validate |
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| 246 | |
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| 247 | // Local Variables: // |
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| 248 | // tab-width: 4 // |
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| 249 | // mode: c++ // |
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| 250 | // compile-command: "make install" // |
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| 251 | // End: // |
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