[0dd3a2f] | 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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[9cb8e88d] | 7 | // Validate.cc -- |
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[0dd3a2f] | 8 | // |
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| 9 | // Author : Richard C. Bilson |
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| 10 | // Created On : Sun May 17 21:50:04 2015 |
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[cbce272] | 11 | // Last Modified By : Andrew Beach |
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| 12 | // Last Modified On : Tus Aug 8 13:27:00 2017 |
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| 13 | // Update Count : 358 |
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[0dd3a2f] | 14 | // |
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| 15 | |
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| 16 | // The "validate" phase of translation is used to take a syntax tree and convert it into a standard form that aims to be |
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| 17 | // as regular in structure as possible. Some assumptions can be made regarding the state of the tree after this pass is |
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| 18 | // complete, including: |
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| 19 | // |
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| 20 | // - No nested structure or union definitions; any in the input are "hoisted" to the level of the containing struct or |
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| 21 | // union. |
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| 22 | // |
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| 23 | // - All enumeration constants have type EnumInstType. |
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| 24 | // |
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[3c13c03] | 25 | // - The type "void" never occurs in lists of function parameter or return types. A function |
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| 26 | // taking no arguments has no argument types. |
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[0dd3a2f] | 27 | // |
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| 28 | // - No context instances exist; they are all replaced by the set of declarations signified by the context, instantiated |
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| 29 | // by the particular set of type arguments. |
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| 30 | // |
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| 31 | // - Every declaration is assigned a unique id. |
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| 32 | // |
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| 33 | // - No typedef declarations or instances exist; the actual type is substituted for each instance. |
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| 34 | // |
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| 35 | // - Each type, struct, and union definition is followed by an appropriate assignment operator. |
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| 36 | // |
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| 37 | // - Each use of a struct or union is connected to a complete definition of that struct or union, even if that |
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| 38 | // definition occurs later in the input. |
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[51b7345] | 39 | |
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[0db6fc0] | 40 | #include "Validate.h" |
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| 41 | |
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[30f9072] | 42 | #include <cstddef> // for size_t |
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| 43 | #include <algorithm> // for move, transform |
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| 44 | #include <cassert> // for safe_dynamic_cast, assertf |
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| 45 | #include <iterator> // for back_inserter, inserter, back_... |
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| 46 | #include <list> // for list, _List_iterator, list<>::... |
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| 47 | #include <map> // for _Rb_tree_iterator, map, map<>:... |
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| 48 | #include <memory> // for unique_ptr, allocator |
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| 49 | #include <string> // for string, operator+, operator== |
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| 50 | #include <tuple> // for get |
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| 51 | #include <utility> // for pair, make_pair |
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| 52 | |
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| 53 | #include "AddVisit.h" // for addVisit |
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| 54 | #include "Autogen.h" // for SizeType, autogenerateRoutines |
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| 55 | #include "CodeGen/CodeGenerator.h" // for genName |
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| 56 | #include "Common/PassVisitor.h" // for PassVisitor, WithDeclsToAdd |
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| 57 | #include "Common/ScopedMap.h" // for ScopedMap<>::const_iterator |
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| 58 | #include "Common/SemanticError.h" // for SemanticError |
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| 59 | #include "Common/UniqueName.h" // for UniqueName |
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| 60 | #include "Common/utility.h" // for operator+, cloneAll, deleteAll |
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| 61 | #include "Concurrency/Keywords.h" // for applyKeywords, implementMutexF... |
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| 62 | #include "FixFunction.h" // for FixFunction |
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| 63 | #include "Indexer.h" // for Indexer |
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| 64 | #include "InitTweak/InitTweak.h" // for isCtorDtor, isCtorDtorAssign |
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| 65 | #include "Parser/LinkageSpec.h" // for C, Cforall |
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| 66 | #include "ResolvExpr/typeops.h" // for extractResultType, typesCompat... |
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| 67 | #include "SynTree/Attribute.h" // for Attribute |
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| 68 | #include "SynTree/Constant.h" // for Constant |
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| 69 | #include "SynTree/Declaration.h" // for EnumDecl, StructDecl, UnionDecl |
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| 70 | #include "SynTree/Expression.h" // for TypeExpr, CompoundLiteralExpr |
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| 71 | #include "SynTree/Initializer.h" // for ListInit, Initializer, noDesig... |
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| 72 | #include "SynTree/Mutator.h" // for mutateAll, Mutator |
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| 73 | #include "SynTree/Statement.h" // for CompoundStmt, DeclStmt, Return... |
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| 74 | #include "SynTree/Type.h" // for Type, TypeInstType, TraitInstType |
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| 75 | #include "SynTree/TypeSubstitution.h" // for TypeSubstitution, applySubstit... |
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| 76 | #include "SynTree/Visitor.h" // for acceptAll, Visitor |
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[51b7345] | 77 | |
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[c8ffe20b] | 78 | #define debugPrint( x ) if ( doDebug ) { std::cout << x; } |
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[51b7345] | 79 | |
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| 80 | namespace SymTab { |
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[9facf3b] | 81 | class HoistStruct final : public Visitor { |
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[c0aa336] | 82 | template< typename Visitor > |
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| 83 | friend void acceptAndAdd( std::list< Declaration * > &translationUnit, Visitor &visitor ); |
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| 84 | template< typename Visitor > |
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| 85 | friend void addVisitStatementList( std::list< Statement* > &stmts, Visitor &visitor ); |
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[a08ba92] | 86 | public: |
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[82dd287] | 87 | /// Flattens nested struct types |
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[0dd3a2f] | 88 | static void hoistStruct( std::list< Declaration * > &translationUnit ); |
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[9cb8e88d] | 89 | |
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[0dd3a2f] | 90 | std::list< Declaration * > &get_declsToAdd() { return declsToAdd; } |
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[9cb8e88d] | 91 | |
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[c0aa336] | 92 | virtual void visit( EnumInstType *enumInstType ); |
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| 93 | virtual void visit( StructInstType *structInstType ); |
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| 94 | virtual void visit( UnionInstType *unionInstType ); |
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[0dd3a2f] | 95 | virtual void visit( StructDecl *aggregateDecl ); |
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| 96 | virtual void visit( UnionDecl *aggregateDecl ); |
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[c8ffe20b] | 97 | |
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[0dd3a2f] | 98 | virtual void visit( CompoundStmt *compoundStmt ); |
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| 99 | virtual void visit( SwitchStmt *switchStmt ); |
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[a08ba92] | 100 | private: |
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[0dd3a2f] | 101 | HoistStruct(); |
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[c8ffe20b] | 102 | |
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[0dd3a2f] | 103 | template< typename AggDecl > void handleAggregate( AggDecl *aggregateDecl ); |
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[c8ffe20b] | 104 | |
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[c0aa336] | 105 | std::list< Declaration * > declsToAdd, declsToAddAfter; |
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[0dd3a2f] | 106 | bool inStruct; |
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[a08ba92] | 107 | }; |
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[c8ffe20b] | 108 | |
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[cce9429] | 109 | /// Fix return types so that every function returns exactly one value |
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[d24d4e1] | 110 | struct ReturnTypeFixer { |
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[cce9429] | 111 | static void fix( std::list< Declaration * > &translationUnit ); |
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| 112 | |
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[0db6fc0] | 113 | void postvisit( FunctionDecl * functionDecl ); |
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| 114 | void postvisit( FunctionType * ftype ); |
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[cce9429] | 115 | }; |
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| 116 | |
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[de91427b] | 117 | /// Replaces enum types by int, and function or array types in function parameter and return lists by appropriate pointers. |
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[d24d4e1] | 118 | struct EnumAndPointerDecay { |
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[06edda0] | 119 | void previsit( EnumDecl *aggregateDecl ); |
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| 120 | void previsit( FunctionType *func ); |
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[a08ba92] | 121 | }; |
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[82dd287] | 122 | |
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| 123 | /// Associates forward declarations of aggregates with their definitions |
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[cce9429] | 124 | class LinkReferenceToTypes final : public Indexer { |
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[0dd3a2f] | 125 | typedef Indexer Parent; |
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[a08ba92] | 126 | public: |
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[cce9429] | 127 | LinkReferenceToTypes( bool doDebug, const Indexer *indexer ); |
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[4a9ccc3] | 128 | using Parent::visit; |
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[c0aa336] | 129 | void visit( EnumInstType *enumInst ) final; |
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[62e5546] | 130 | void visit( StructInstType *structInst ) final; |
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| 131 | void visit( UnionInstType *unionInst ) final; |
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| 132 | void visit( TraitInstType *contextInst ) final; |
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[c0aa336] | 133 | void visit( EnumDecl *enumDecl ) final; |
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[62e5546] | 134 | void visit( StructDecl *structDecl ) final; |
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| 135 | void visit( UnionDecl *unionDecl ) final; |
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| 136 | void visit( TypeInstType *typeInst ) final; |
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[06edda0] | 137 | private: |
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[0dd3a2f] | 138 | const Indexer *indexer; |
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[9cb8e88d] | 139 | |
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[c0aa336] | 140 | typedef std::map< std::string, std::list< EnumInstType * > > ForwardEnumsType; |
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[0dd3a2f] | 141 | typedef std::map< std::string, std::list< StructInstType * > > ForwardStructsType; |
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| 142 | typedef std::map< std::string, std::list< UnionInstType * > > ForwardUnionsType; |
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[c0aa336] | 143 | ForwardEnumsType forwardEnums; |
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[0dd3a2f] | 144 | ForwardStructsType forwardStructs; |
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| 145 | ForwardUnionsType forwardUnions; |
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[a08ba92] | 146 | }; |
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[c8ffe20b] | 147 | |
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[06edda0] | 148 | /// Replaces array and function types in forall lists by appropriate pointer type and assigns each Object and Function declaration a unique ID. |
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| 149 | class ForallPointerDecay final : public Indexer { |
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[0dd3a2f] | 150 | typedef Indexer Parent; |
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[a08ba92] | 151 | public: |
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[4a9ccc3] | 152 | using Parent::visit; |
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[06edda0] | 153 | ForallPointerDecay( const Indexer *indexer ); |
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| 154 | |
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[4a9ccc3] | 155 | virtual void visit( ObjectDecl *object ) override; |
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| 156 | virtual void visit( FunctionDecl *func ) override; |
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[c8ffe20b] | 157 | |
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[0dd3a2f] | 158 | const Indexer *indexer; |
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[a08ba92] | 159 | }; |
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[c8ffe20b] | 160 | |
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[d24d4e1] | 161 | struct ReturnChecker : public WithGuards { |
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[de91427b] | 162 | /// Checks that return statements return nothing if their return type is void |
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| 163 | /// and return something if the return type is non-void. |
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| 164 | static void checkFunctionReturns( std::list< Declaration * > & translationUnit ); |
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[d24d4e1] | 165 | |
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[0db6fc0] | 166 | void previsit( FunctionDecl * functionDecl ); |
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| 167 | void previsit( ReturnStmt * returnStmt ); |
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[de91427b] | 168 | |
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[0db6fc0] | 169 | typedef std::list< DeclarationWithType * > ReturnVals; |
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| 170 | ReturnVals returnVals; |
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[de91427b] | 171 | }; |
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| 172 | |
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[a08ba92] | 173 | class EliminateTypedef : public Mutator { |
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| 174 | public: |
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[de91427b] | 175 | EliminateTypedef() : scopeLevel( 0 ) {} |
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| 176 | /// Replaces typedefs by forward declarations |
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[0dd3a2f] | 177 | static void eliminateTypedef( std::list< Declaration * > &translationUnit ); |
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[a08ba92] | 178 | private: |
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[0dd3a2f] | 179 | virtual Declaration *mutate( TypedefDecl *typeDecl ); |
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| 180 | virtual TypeDecl *mutate( TypeDecl *typeDecl ); |
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| 181 | virtual DeclarationWithType *mutate( FunctionDecl *funcDecl ); |
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[1db21619] | 182 | virtual DeclarationWithType *mutate( ObjectDecl *objDecl ); |
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[0dd3a2f] | 183 | virtual CompoundStmt *mutate( CompoundStmt *compoundStmt ); |
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| 184 | virtual Type *mutate( TypeInstType *aggregateUseType ); |
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| 185 | virtual Expression *mutate( CastExpr *castExpr ); |
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[cc79d97] | 186 | |
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[85c4ef0] | 187 | virtual Declaration *mutate( StructDecl * structDecl ); |
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| 188 | virtual Declaration *mutate( UnionDecl * unionDecl ); |
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| 189 | virtual Declaration *mutate( EnumDecl * enumDecl ); |
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[4040425] | 190 | virtual Declaration *mutate( TraitDecl * contextDecl ); |
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[85c4ef0] | 191 | |
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| 192 | template<typename AggDecl> |
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| 193 | AggDecl *handleAggregate( AggDecl * aggDecl ); |
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| 194 | |
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[45161b4d] | 195 | template<typename AggDecl> |
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| 196 | void addImplicitTypedef( AggDecl * aggDecl ); |
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[70a06f6] | 197 | |
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[46f6134] | 198 | typedef std::unique_ptr<TypedefDecl> TypedefDeclPtr; |
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[e491159] | 199 | typedef ScopedMap< std::string, std::pair< TypedefDeclPtr, int > > TypedefMap; |
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[679864e1] | 200 | typedef std::map< std::string, TypeDecl * > TypeDeclMap; |
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[cc79d97] | 201 | TypedefMap typedefNames; |
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[679864e1] | 202 | TypeDeclMap typedeclNames; |
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[cc79d97] | 203 | int scopeLevel; |
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[a08ba92] | 204 | }; |
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[c8ffe20b] | 205 | |
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[d24d4e1] | 206 | struct VerifyCtorDtorAssign { |
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[d1969a6] | 207 | /// ensure that constructors, destructors, and assignment have at least one |
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| 208 | /// parameter, the first of which must be a pointer, and that ctor/dtors have no |
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[9cb8e88d] | 209 | /// return values. |
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| 210 | static void verify( std::list< Declaration * > &translationUnit ); |
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| 211 | |
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[0db6fc0] | 212 | void previsit( FunctionDecl *funcDecl ); |
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[5f98ce5] | 213 | }; |
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[70a06f6] | 214 | |
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[11ab8ea8] | 215 | /// ensure that generic types have the correct number of type arguments |
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[d24d4e1] | 216 | struct ValidateGenericParameters { |
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[0db6fc0] | 217 | void previsit( StructInstType * inst ); |
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| 218 | void previsit( UnionInstType * inst ); |
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[11ab8ea8] | 219 | }; |
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| 220 | |
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[d24d4e1] | 221 | struct ArrayLength { |
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[fbd7ad6] | 222 | /// for array types without an explicit length, compute the length and store it so that it |
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| 223 | /// is known to the rest of the phases. For example, |
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| 224 | /// int x[] = { 1, 2, 3 }; |
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| 225 | /// int y[][2] = { { 1, 2, 3 }, { 1, 2, 3 } }; |
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| 226 | /// here x and y are known at compile-time to have length 3, so change this into |
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| 227 | /// int x[3] = { 1, 2, 3 }; |
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| 228 | /// int y[3][2] = { { 1, 2, 3 }, { 1, 2, 3 } }; |
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| 229 | static void computeLength( std::list< Declaration * > & translationUnit ); |
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| 230 | |
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[0db6fc0] | 231 | void previsit( ObjectDecl * objDecl ); |
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[fbd7ad6] | 232 | }; |
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| 233 | |
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[d24d4e1] | 234 | struct CompoundLiteral final : public WithDeclsToAdd, public WithVisitorRef<CompoundLiteral> { |
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[68fe077a] | 235 | Type::StorageClasses storageClasses; |
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[630a82a] | 236 | |
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[d24d4e1] | 237 | void premutate( ObjectDecl *objectDecl ); |
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| 238 | Expression * postmutate( CompoundLiteralExpr *compLitExpr ); |
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[9cb8e88d] | 239 | }; |
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| 240 | |
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[a08ba92] | 241 | void validate( std::list< Declaration * > &translationUnit, bool doDebug ) { |
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[06edda0] | 242 | PassVisitor<EnumAndPointerDecay> epc; |
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[cce9429] | 243 | LinkReferenceToTypes lrt( doDebug, 0 ); |
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[06edda0] | 244 | ForallPointerDecay fpd( 0 ); |
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[d24d4e1] | 245 | PassVisitor<CompoundLiteral> compoundliteral; |
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[0db6fc0] | 246 | PassVisitor<ValidateGenericParameters> genericParams; |
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[630a82a] | 247 | |
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[fbcde64] | 248 | EliminateTypedef::eliminateTypedef( translationUnit ); |
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[11ab8ea8] | 249 | HoistStruct::hoistStruct( translationUnit ); // must happen after EliminateTypedef, so that aggregate typedefs occur in the correct order |
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[cce9429] | 250 | ReturnTypeFixer::fix( translationUnit ); // must happen before autogen |
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[861799c] | 251 | acceptAll( translationUnit, lrt ); // must happen before autogen, because sized flag needs to propagate to generated functions |
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[11ab8ea8] | 252 | acceptAll( translationUnit, genericParams ); // check as early as possible - can't happen before LinkReferenceToTypes |
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[ed8a0d2] | 253 | acceptAll( translationUnit, epc ); // must happen before VerifyCtorDtorAssign, because void return objects should not exist |
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| 254 | VerifyCtorDtorAssign::verify( translationUnit ); // must happen before autogen, because autogen examines existing ctor/dtors |
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[bcda04c] | 255 | Concurrency::applyKeywords( translationUnit ); |
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[06edda0] | 256 | autogenerateRoutines( translationUnit ); // moved up, used to be below compoundLiteral - currently needs EnumAndPointerDecay |
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[bcda04c] | 257 | Concurrency::implementMutexFuncs( translationUnit ); |
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| 258 | Concurrency::implementThreadStarter( translationUnit ); |
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[de91427b] | 259 | ReturnChecker::checkFunctionReturns( translationUnit ); |
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[d24d4e1] | 260 | mutateAll( translationUnit, compoundliteral ); |
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[06edda0] | 261 | acceptAll( translationUnit, fpd ); |
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[fbd7ad6] | 262 | ArrayLength::computeLength( translationUnit ); |
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[a08ba92] | 263 | } |
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[9cb8e88d] | 264 | |
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[a08ba92] | 265 | void validateType( Type *type, const Indexer *indexer ) { |
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[06edda0] | 266 | PassVisitor<EnumAndPointerDecay> epc; |
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[cce9429] | 267 | LinkReferenceToTypes lrt( false, indexer ); |
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[06edda0] | 268 | ForallPointerDecay fpd( indexer ); |
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[bda58ad] | 269 | type->accept( epc ); |
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[cce9429] | 270 | type->accept( lrt ); |
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[06edda0] | 271 | type->accept( fpd ); |
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[a08ba92] | 272 | } |
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[c8ffe20b] | 273 | |
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[a08ba92] | 274 | void HoistStruct::hoistStruct( std::list< Declaration * > &translationUnit ) { |
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[0dd3a2f] | 275 | HoistStruct hoister; |
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[c0aa336] | 276 | acceptAndAdd( translationUnit, hoister ); |
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[a08ba92] | 277 | } |
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[c8ffe20b] | 278 | |
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[a08ba92] | 279 | HoistStruct::HoistStruct() : inStruct( false ) { |
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| 280 | } |
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[c8ffe20b] | 281 | |
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[a08ba92] | 282 | void filter( std::list< Declaration * > &declList, bool (*pred)( Declaration * ), bool doDelete ) { |
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[0dd3a2f] | 283 | std::list< Declaration * >::iterator i = declList.begin(); |
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| 284 | while ( i != declList.end() ) { |
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| 285 | std::list< Declaration * >::iterator next = i; |
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| 286 | ++next; |
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| 287 | if ( pred( *i ) ) { |
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| 288 | if ( doDelete ) { |
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| 289 | delete *i; |
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| 290 | } // if |
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| 291 | declList.erase( i ); |
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| 292 | } // if |
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| 293 | i = next; |
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| 294 | } // while |
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[a08ba92] | 295 | } |
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[c8ffe20b] | 296 | |
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[a08ba92] | 297 | bool isStructOrUnion( Declaration *decl ) { |
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[0dd3a2f] | 298 | return dynamic_cast< StructDecl * >( decl ) || dynamic_cast< UnionDecl * >( decl ); |
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[a08ba92] | 299 | } |
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[c0aa336] | 300 | |
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[a08ba92] | 301 | template< typename AggDecl > |
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| 302 | void HoistStruct::handleAggregate( AggDecl *aggregateDecl ) { |
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[0dd3a2f] | 303 | if ( inStruct ) { |
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| 304 | // Add elements in stack order corresponding to nesting structure. |
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| 305 | declsToAdd.push_front( aggregateDecl ); |
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| 306 | Visitor::visit( aggregateDecl ); |
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| 307 | } else { |
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| 308 | inStruct = true; |
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| 309 | Visitor::visit( aggregateDecl ); |
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| 310 | inStruct = false; |
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| 311 | } // if |
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| 312 | // Always remove the hoisted aggregate from the inner structure. |
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| 313 | filter( aggregateDecl->get_members(), isStructOrUnion, false ); |
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[a08ba92] | 314 | } |
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[c8ffe20b] | 315 | |
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[c0aa336] | 316 | void HoistStruct::visit( EnumInstType *structInstType ) { |
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| 317 | if ( structInstType->get_baseEnum() ) { |
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| 318 | declsToAdd.push_front( structInstType->get_baseEnum() ); |
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| 319 | } |
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| 320 | } |
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| 321 | |
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| 322 | void HoistStruct::visit( StructInstType *structInstType ) { |
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| 323 | if ( structInstType->get_baseStruct() ) { |
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| 324 | declsToAdd.push_front( structInstType->get_baseStruct() ); |
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| 325 | } |
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| 326 | } |
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| 327 | |
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| 328 | void HoistStruct::visit( UnionInstType *structInstType ) { |
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| 329 | if ( structInstType->get_baseUnion() ) { |
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| 330 | declsToAdd.push_front( structInstType->get_baseUnion() ); |
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| 331 | } |
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| 332 | } |
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| 333 | |
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[a08ba92] | 334 | void HoistStruct::visit( StructDecl *aggregateDecl ) { |
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[0dd3a2f] | 335 | handleAggregate( aggregateDecl ); |
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[a08ba92] | 336 | } |
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[c8ffe20b] | 337 | |
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[a08ba92] | 338 | void HoistStruct::visit( UnionDecl *aggregateDecl ) { |
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[0dd3a2f] | 339 | handleAggregate( aggregateDecl ); |
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[a08ba92] | 340 | } |
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[c8ffe20b] | 341 | |
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[a08ba92] | 342 | void HoistStruct::visit( CompoundStmt *compoundStmt ) { |
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[0dd3a2f] | 343 | addVisit( compoundStmt, *this ); |
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[a08ba92] | 344 | } |
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[c8ffe20b] | 345 | |
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[a08ba92] | 346 | void HoistStruct::visit( SwitchStmt *switchStmt ) { |
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[0dd3a2f] | 347 | addVisit( switchStmt, *this ); |
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[a08ba92] | 348 | } |
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[c8ffe20b] | 349 | |
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[06edda0] | 350 | void EnumAndPointerDecay::previsit( EnumDecl *enumDecl ) { |
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[0dd3a2f] | 351 | // Set the type of each member of the enumeration to be EnumConstant |
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| 352 | for ( std::list< Declaration * >::iterator i = enumDecl->get_members().begin(); i != enumDecl->get_members().end(); ++i ) { |
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[f6d7e0f] | 353 | ObjectDecl * obj = dynamic_cast< ObjectDecl * >( *i ); |
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[0dd3a2f] | 354 | assert( obj ); |
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[f2e40a9f] | 355 | obj->set_type( new EnumInstType( Type::Qualifiers( Type::Const ), enumDecl->get_name() ) ); |
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[0dd3a2f] | 356 | } // for |
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[a08ba92] | 357 | } |
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[51b7345] | 358 | |
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[a08ba92] | 359 | namespace { |
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[83de11e] | 360 | template< typename DWTList > |
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| 361 | void fixFunctionList( DWTList & dwts, FunctionType * func ) { |
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[0dd3a2f] | 362 | // the only case in which "void" is valid is where it is the only one in the list; then it should be removed |
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[06edda0] | 363 | // entirely. other fix ups are handled by the FixFunction class |
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[83de11e] | 364 | typedef typename DWTList::iterator DWTIterator; |
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| 365 | DWTIterator begin( dwts.begin() ), end( dwts.end() ); |
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[0dd3a2f] | 366 | if ( begin == end ) return; |
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| 367 | FixFunction fixer; |
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| 368 | DWTIterator i = begin; |
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[83de11e] | 369 | *i = (*i)->acceptMutator( fixer ); |
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[0dd3a2f] | 370 | if ( fixer.get_isVoid() ) { |
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| 371 | DWTIterator j = i; |
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| 372 | ++i; |
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[bda58ad] | 373 | delete *j; |
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[83de11e] | 374 | dwts.erase( j ); |
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[9cb8e88d] | 375 | if ( i != end ) { |
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[0dd3a2f] | 376 | throw SemanticError( "invalid type void in function type ", func ); |
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| 377 | } // if |
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| 378 | } else { |
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| 379 | ++i; |
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| 380 | for ( ; i != end; ++i ) { |
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| 381 | FixFunction fixer; |
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[06edda0] | 382 | *i = (*i)->acceptMutator( fixer ); |
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[0dd3a2f] | 383 | if ( fixer.get_isVoid() ) { |
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| 384 | throw SemanticError( "invalid type void in function type ", func ); |
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| 385 | } // if |
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| 386 | } // for |
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| 387 | } // if |
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| 388 | } |
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[a08ba92] | 389 | } |
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[c8ffe20b] | 390 | |
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[06edda0] | 391 | void EnumAndPointerDecay::previsit( FunctionType *func ) { |
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[0dd3a2f] | 392 | // Fix up parameters and return types |
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[83de11e] | 393 | fixFunctionList( func->get_parameters(), func ); |
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| 394 | fixFunctionList( func->get_returnVals(), func ); |
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[a08ba92] | 395 | } |
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[c8ffe20b] | 396 | |
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[cce9429] | 397 | LinkReferenceToTypes::LinkReferenceToTypes( bool doDebug, const Indexer *other_indexer ) : Indexer( doDebug ) { |
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[0dd3a2f] | 398 | if ( other_indexer ) { |
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| 399 | indexer = other_indexer; |
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| 400 | } else { |
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| 401 | indexer = this; |
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| 402 | } // if |
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[a08ba92] | 403 | } |
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[c8ffe20b] | 404 | |
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[c0aa336] | 405 | void LinkReferenceToTypes::visit( EnumInstType *enumInst ) { |
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| 406 | Parent::visit( enumInst ); |
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| 407 | EnumDecl *st = indexer->lookupEnum( enumInst->get_name() ); |
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| 408 | // it's not a semantic error if the enum is not found, just an implicit forward declaration |
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| 409 | if ( st ) { |
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| 410 | //assert( ! enumInst->get_baseEnum() || enumInst->get_baseEnum()->get_members().empty() || ! st->get_members().empty() ); |
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| 411 | enumInst->set_baseEnum( st ); |
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| 412 | } // if |
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| 413 | if ( ! st || st->get_members().empty() ) { |
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| 414 | // use of forward declaration |
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| 415 | forwardEnums[ enumInst->get_name() ].push_back( enumInst ); |
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| 416 | } // if |
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| 417 | } |
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| 418 | |
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[cce9429] | 419 | void LinkReferenceToTypes::visit( StructInstType *structInst ) { |
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[0dd3a2f] | 420 | Parent::visit( structInst ); |
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| 421 | StructDecl *st = indexer->lookupStruct( structInst->get_name() ); |
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| 422 | // it's not a semantic error if the struct is not found, just an implicit forward declaration |
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| 423 | if ( st ) { |
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[98735ef] | 424 | //assert( ! structInst->get_baseStruct() || structInst->get_baseStruct()->get_members().empty() || ! st->get_members().empty() ); |
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[0dd3a2f] | 425 | structInst->set_baseStruct( st ); |
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| 426 | } // if |
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| 427 | if ( ! st || st->get_members().empty() ) { |
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| 428 | // use of forward declaration |
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| 429 | forwardStructs[ structInst->get_name() ].push_back( structInst ); |
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| 430 | } // if |
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[a08ba92] | 431 | } |
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[c8ffe20b] | 432 | |
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[cce9429] | 433 | void LinkReferenceToTypes::visit( UnionInstType *unionInst ) { |
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[0dd3a2f] | 434 | Parent::visit( unionInst ); |
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| 435 | UnionDecl *un = indexer->lookupUnion( unionInst->get_name() ); |
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| 436 | // it's not a semantic error if the union is not found, just an implicit forward declaration |
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| 437 | if ( un ) { |
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| 438 | unionInst->set_baseUnion( un ); |
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| 439 | } // if |
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| 440 | if ( ! un || un->get_members().empty() ) { |
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| 441 | // use of forward declaration |
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| 442 | forwardUnions[ unionInst->get_name() ].push_back( unionInst ); |
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| 443 | } // if |
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[a08ba92] | 444 | } |
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[c8ffe20b] | 445 | |
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[4a9ccc3] | 446 | void LinkReferenceToTypes::visit( TraitInstType *traitInst ) { |
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| 447 | Parent::visit( traitInst ); |
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| 448 | if ( traitInst->get_name() == "sized" ) { |
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[2c57025] | 449 | // "sized" is a special trait with no members - just flick the sized status on for the type variable |
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[4a9ccc3] | 450 | if ( traitInst->get_parameters().size() != 1 ) { |
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| 451 | throw SemanticError( "incorrect number of trait parameters: ", traitInst ); |
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[2c57025] | 452 | } |
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[4a9ccc3] | 453 | TypeExpr * param = safe_dynamic_cast< TypeExpr * > ( traitInst->get_parameters().front() ); |
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[2c57025] | 454 | TypeInstType * inst = safe_dynamic_cast< TypeInstType * > ( param->get_type() ); |
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| 455 | TypeDecl * decl = inst->get_baseType(); |
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| 456 | decl->set_sized( true ); |
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| 457 | // since "sized" is special, the next few steps don't apply |
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| 458 | return; |
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| 459 | } |
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[4a9ccc3] | 460 | TraitDecl *traitDecl = indexer->lookupTrait( traitInst->get_name() ); |
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| 461 | if ( ! traitDecl ) { |
---|
| 462 | throw SemanticError( "use of undeclared trait " + traitInst->get_name() ); |
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[17cd4eb] | 463 | } // if |
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[4a9ccc3] | 464 | if ( traitDecl->get_parameters().size() != traitInst->get_parameters().size() ) { |
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| 465 | throw SemanticError( "incorrect number of trait parameters: ", traitInst ); |
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| 466 | } // if |
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| 467 | |
---|
| 468 | for ( TypeDecl * td : traitDecl->get_parameters() ) { |
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| 469 | for ( DeclarationWithType * assert : td->get_assertions() ) { |
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| 470 | traitInst->get_members().push_back( assert->clone() ); |
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[0dd3a2f] | 471 | } // for |
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| 472 | } // for |
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[51b986f] | 473 | |
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[4a9ccc3] | 474 | // need to clone members of the trait for ownership purposes |
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[79970ed] | 475 | std::list< Declaration * > members; |
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[4a9ccc3] | 476 | std::transform( traitDecl->get_members().begin(), traitDecl->get_members().end(), back_inserter( members ), [](Declaration * dwt) { return dwt->clone(); } ); |
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| 477 | |
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| 478 | applySubstitution( traitDecl->get_parameters().begin(), traitDecl->get_parameters().end(), traitInst->get_parameters().begin(), members.begin(), members.end(), back_inserter( traitInst->get_members() ) ); |
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[79970ed] | 479 | |
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[4a9ccc3] | 480 | // need to carry over the 'sized' status of each decl in the instance |
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| 481 | for ( auto p : group_iterate( traitDecl->get_parameters(), traitInst->get_parameters() ) ) { |
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| 482 | TypeExpr * expr = safe_dynamic_cast< TypeExpr * >( std::get<1>(p) ); |
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| 483 | if ( TypeInstType * inst = dynamic_cast< TypeInstType * >( expr->get_type() ) ) { |
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| 484 | TypeDecl * formalDecl = std::get<0>(p); |
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| 485 | TypeDecl * instDecl = inst->get_baseType(); |
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| 486 | if ( formalDecl->get_sized() ) instDecl->set_sized( true ); |
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| 487 | } |
---|
| 488 | } |
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[a08ba92] | 489 | } |
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[c8ffe20b] | 490 | |
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[c0aa336] | 491 | void LinkReferenceToTypes::visit( EnumDecl *enumDecl ) { |
---|
| 492 | // visit enum members first so that the types of self-referencing members are updated properly |
---|
| 493 | Parent::visit( enumDecl ); |
---|
| 494 | if ( ! enumDecl->get_members().empty() ) { |
---|
| 495 | ForwardEnumsType::iterator fwds = forwardEnums.find( enumDecl->get_name() ); |
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| 496 | if ( fwds != forwardEnums.end() ) { |
---|
| 497 | for ( std::list< EnumInstType * >::iterator inst = fwds->second.begin(); inst != fwds->second.end(); ++inst ) { |
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| 498 | (*inst )->set_baseEnum( enumDecl ); |
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| 499 | } // for |
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| 500 | forwardEnums.erase( fwds ); |
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| 501 | } // if |
---|
| 502 | } // if |
---|
| 503 | } |
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| 504 | |
---|
[cce9429] | 505 | void LinkReferenceToTypes::visit( StructDecl *structDecl ) { |
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[677c1be] | 506 | // visit struct members first so that the types of self-referencing members are updated properly |
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[67cf18c] | 507 | // xxx - need to ensure that type parameters match up between forward declarations and definition (most importantly, number of type parameters and and their defaults) |
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[677c1be] | 508 | Parent::visit( structDecl ); |
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[0dd3a2f] | 509 | if ( ! structDecl->get_members().empty() ) { |
---|
| 510 | ForwardStructsType::iterator fwds = forwardStructs.find( structDecl->get_name() ); |
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| 511 | if ( fwds != forwardStructs.end() ) { |
---|
| 512 | for ( std::list< StructInstType * >::iterator inst = fwds->second.begin(); inst != fwds->second.end(); ++inst ) { |
---|
| 513 | (*inst )->set_baseStruct( structDecl ); |
---|
| 514 | } // for |
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| 515 | forwardStructs.erase( fwds ); |
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| 516 | } // if |
---|
| 517 | } // if |
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[a08ba92] | 518 | } |
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[c8ffe20b] | 519 | |
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[cce9429] | 520 | void LinkReferenceToTypes::visit( UnionDecl *unionDecl ) { |
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[677c1be] | 521 | Parent::visit( unionDecl ); |
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[0dd3a2f] | 522 | if ( ! unionDecl->get_members().empty() ) { |
---|
| 523 | ForwardUnionsType::iterator fwds = forwardUnions.find( unionDecl->get_name() ); |
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| 524 | if ( fwds != forwardUnions.end() ) { |
---|
| 525 | for ( std::list< UnionInstType * >::iterator inst = fwds->second.begin(); inst != fwds->second.end(); ++inst ) { |
---|
| 526 | (*inst )->set_baseUnion( unionDecl ); |
---|
| 527 | } // for |
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| 528 | forwardUnions.erase( fwds ); |
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| 529 | } // if |
---|
| 530 | } // if |
---|
[a08ba92] | 531 | } |
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[c8ffe20b] | 532 | |
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[cce9429] | 533 | void LinkReferenceToTypes::visit( TypeInstType *typeInst ) { |
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[0dd3a2f] | 534 | if ( NamedTypeDecl *namedTypeDecl = lookupType( typeInst->get_name() ) ) { |
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| 535 | if ( TypeDecl *typeDecl = dynamic_cast< TypeDecl * >( namedTypeDecl ) ) { |
---|
| 536 | typeInst->set_isFtype( typeDecl->get_kind() == TypeDecl::Ftype ); |
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| 537 | } // if |
---|
| 538 | } // if |
---|
[a08ba92] | 539 | } |
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[c8ffe20b] | 540 | |
---|
[06edda0] | 541 | ForallPointerDecay::ForallPointerDecay( const Indexer *other_indexer ) : Indexer( false ) { |
---|
[0dd3a2f] | 542 | if ( other_indexer ) { |
---|
| 543 | indexer = other_indexer; |
---|
| 544 | } else { |
---|
| 545 | indexer = this; |
---|
| 546 | } // if |
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[a08ba92] | 547 | } |
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[c8ffe20b] | 548 | |
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[4a9ccc3] | 549 | /// Fix up assertions - flattens assertion lists, removing all trait instances |
---|
| 550 | void forallFixer( Type * func ) { |
---|
| 551 | for ( TypeDecl * type : func->get_forall() ) { |
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[0dd3a2f] | 552 | std::list< DeclarationWithType * > toBeDone, nextRound; |
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[4a9ccc3] | 553 | toBeDone.splice( toBeDone.end(), type->get_assertions() ); |
---|
[0dd3a2f] | 554 | while ( ! toBeDone.empty() ) { |
---|
[4a9ccc3] | 555 | for ( DeclarationWithType * assertion : toBeDone ) { |
---|
| 556 | if ( TraitInstType *traitInst = dynamic_cast< TraitInstType * >( assertion->get_type() ) ) { |
---|
| 557 | // expand trait instance into all of its members |
---|
| 558 | for ( Declaration * member : traitInst->get_members() ) { |
---|
| 559 | DeclarationWithType *dwt = safe_dynamic_cast< DeclarationWithType * >( member ); |
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[0dd3a2f] | 560 | nextRound.push_back( dwt->clone() ); |
---|
| 561 | } |
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[4a9ccc3] | 562 | delete traitInst; |
---|
[0dd3a2f] | 563 | } else { |
---|
[4a9ccc3] | 564 | // pass assertion through |
---|
[0dd3a2f] | 565 | FixFunction fixer; |
---|
[4a9ccc3] | 566 | assertion = assertion->acceptMutator( fixer ); |
---|
[0dd3a2f] | 567 | if ( fixer.get_isVoid() ) { |
---|
| 568 | throw SemanticError( "invalid type void in assertion of function ", func ); |
---|
| 569 | } |
---|
[4a9ccc3] | 570 | type->get_assertions().push_back( assertion ); |
---|
[0dd3a2f] | 571 | } // if |
---|
| 572 | } // for |
---|
| 573 | toBeDone.clear(); |
---|
| 574 | toBeDone.splice( toBeDone.end(), nextRound ); |
---|
| 575 | } // while |
---|
| 576 | } // for |
---|
[a08ba92] | 577 | } |
---|
[c8ffe20b] | 578 | |
---|
[06edda0] | 579 | void ForallPointerDecay::visit( ObjectDecl *object ) { |
---|
[0dd3a2f] | 580 | forallFixer( object->get_type() ); |
---|
| 581 | if ( PointerType *pointer = dynamic_cast< PointerType * >( object->get_type() ) ) { |
---|
| 582 | forallFixer( pointer->get_base() ); |
---|
| 583 | } // if |
---|
| 584 | Parent::visit( object ); |
---|
| 585 | object->fixUniqueId(); |
---|
[a08ba92] | 586 | } |
---|
[c8ffe20b] | 587 | |
---|
[06edda0] | 588 | void ForallPointerDecay::visit( FunctionDecl *func ) { |
---|
[0dd3a2f] | 589 | forallFixer( func->get_type() ); |
---|
| 590 | Parent::visit( func ); |
---|
| 591 | func->fixUniqueId(); |
---|
[a08ba92] | 592 | } |
---|
[c8ffe20b] | 593 | |
---|
[de91427b] | 594 | void ReturnChecker::checkFunctionReturns( std::list< Declaration * > & translationUnit ) { |
---|
[0db6fc0] | 595 | PassVisitor<ReturnChecker> checker; |
---|
[de91427b] | 596 | acceptAll( translationUnit, checker ); |
---|
| 597 | } |
---|
| 598 | |
---|
[0db6fc0] | 599 | void ReturnChecker::previsit( FunctionDecl * functionDecl ) { |
---|
[0508ab3] | 600 | GuardValue( returnVals ); |
---|
[de91427b] | 601 | returnVals = functionDecl->get_functionType()->get_returnVals(); |
---|
[0db6fc0] | 602 | } |
---|
[de91427b] | 603 | |
---|
[0db6fc0] | 604 | void ReturnChecker::previsit( ReturnStmt * returnStmt ) { |
---|
[74d1804] | 605 | // Previously this also checked for the existence of an expr paired with no return values on |
---|
| 606 | // the function return type. This is incorrect, since you can have an expression attached to |
---|
| 607 | // a return statement in a void-returning function in C. The expression is treated as if it |
---|
| 608 | // were cast to void. |
---|
[30f9072] | 609 | if ( ! returnStmt->get_expr() && returnVals.size() != 0 ) { |
---|
[de91427b] | 610 | throw SemanticError( "Non-void function returns no values: " , returnStmt ); |
---|
| 611 | } |
---|
| 612 | } |
---|
| 613 | |
---|
| 614 | |
---|
[a08ba92] | 615 | bool isTypedef( Declaration *decl ) { |
---|
[0dd3a2f] | 616 | return dynamic_cast< TypedefDecl * >( decl ); |
---|
[a08ba92] | 617 | } |
---|
[c8ffe20b] | 618 | |
---|
[a08ba92] | 619 | void EliminateTypedef::eliminateTypedef( std::list< Declaration * > &translationUnit ) { |
---|
[0dd3a2f] | 620 | EliminateTypedef eliminator; |
---|
| 621 | mutateAll( translationUnit, eliminator ); |
---|
[5f98ce5] | 622 | if ( eliminator.typedefNames.count( "size_t" ) ) { |
---|
| 623 | // grab and remember declaration of size_t |
---|
| 624 | SizeType = eliminator.typedefNames["size_t"].first->get_base()->clone(); |
---|
| 625 | } else { |
---|
[40e636a] | 626 | // xxx - missing global typedef for size_t - default to long unsigned int, even though that may be wrong |
---|
| 627 | // eventually should have a warning for this case. |
---|
| 628 | SizeType = new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt ); |
---|
[5f98ce5] | 629 | } |
---|
[0dd3a2f] | 630 | filter( translationUnit, isTypedef, true ); |
---|
[5f98ce5] | 631 | |
---|
[a08ba92] | 632 | } |
---|
[c8ffe20b] | 633 | |
---|
[85c4ef0] | 634 | Type *EliminateTypedef::mutate( TypeInstType * typeInst ) { |
---|
[9cb8e88d] | 635 | // instances of typedef types will come here. If it is an instance |
---|
[cc79d97] | 636 | // of a typdef type, link the instance to its actual type. |
---|
| 637 | TypedefMap::const_iterator def = typedefNames.find( typeInst->get_name() ); |
---|
[0dd3a2f] | 638 | if ( def != typedefNames.end() ) { |
---|
[cc79d97] | 639 | Type *ret = def->second.first->get_base()->clone(); |
---|
[6f95000] | 640 | ret->get_qualifiers() |= typeInst->get_qualifiers(); |
---|
[0215a76f] | 641 | // place instance parameters on the typedef'd type |
---|
| 642 | if ( ! typeInst->get_parameters().empty() ) { |
---|
| 643 | ReferenceToType *rtt = dynamic_cast<ReferenceToType*>(ret); |
---|
| 644 | if ( ! rtt ) { |
---|
| 645 | throw SemanticError("cannot apply type parameters to base type of " + typeInst->get_name()); |
---|
| 646 | } |
---|
| 647 | rtt->get_parameters().clear(); |
---|
[b644d6f] | 648 | cloneAll( typeInst->get_parameters(), rtt->get_parameters() ); |
---|
| 649 | mutateAll( rtt->get_parameters(), *this ); // recursively fix typedefs on parameters |
---|
[1db21619] | 650 | } // if |
---|
[0dd3a2f] | 651 | delete typeInst; |
---|
| 652 | return ret; |
---|
[679864e1] | 653 | } else { |
---|
| 654 | TypeDeclMap::const_iterator base = typedeclNames.find( typeInst->get_name() ); |
---|
[43c89a7] | 655 | assertf( base != typedeclNames.end(), "Can't find typedecl name %s", typeInst->get_name().c_str() ); |
---|
[1e8b02f5] | 656 | typeInst->set_baseType( base->second ); |
---|
[0dd3a2f] | 657 | } // if |
---|
| 658 | return typeInst; |
---|
[a08ba92] | 659 | } |
---|
[c8ffe20b] | 660 | |
---|
[85c4ef0] | 661 | Declaration *EliminateTypedef::mutate( TypedefDecl * tyDecl ) { |
---|
[0dd3a2f] | 662 | Declaration *ret = Mutator::mutate( tyDecl ); |
---|
[5f98ce5] | 663 | |
---|
[cc79d97] | 664 | if ( typedefNames.count( tyDecl->get_name() ) == 1 && typedefNames[ tyDecl->get_name() ].second == scopeLevel ) { |
---|
[9cb8e88d] | 665 | // typedef to the same name from the same scope |
---|
[cc79d97] | 666 | // must be from the same type |
---|
| 667 | |
---|
| 668 | Type * t1 = tyDecl->get_base(); |
---|
| 669 | Type * t2 = typedefNames[ tyDecl->get_name() ].first->get_base(); |
---|
[1cbca6e] | 670 | if ( ! ResolvExpr::typesCompatible( t1, t2, Indexer() ) ) { |
---|
[cc79d97] | 671 | throw SemanticError( "cannot redefine typedef: " + tyDecl->get_name() ); |
---|
[85c4ef0] | 672 | } |
---|
[cc79d97] | 673 | } else { |
---|
[46f6134] | 674 | typedefNames[ tyDecl->get_name() ] = std::make_pair( TypedefDeclPtr( tyDecl ), scopeLevel ); |
---|
[cc79d97] | 675 | } // if |
---|
| 676 | |
---|
[0dd3a2f] | 677 | // When a typedef is a forward declaration: |
---|
| 678 | // typedef struct screen SCREEN; |
---|
| 679 | // the declaration portion must be retained: |
---|
| 680 | // struct screen; |
---|
| 681 | // because the expansion of the typedef is: |
---|
| 682 | // void rtn( SCREEN *p ) => void rtn( struct screen *p ) |
---|
| 683 | // hence the type-name "screen" must be defined. |
---|
| 684 | // Note, qualifiers on the typedef are superfluous for the forward declaration. |
---|
[6f95000] | 685 | |
---|
| 686 | Type *designatorType = tyDecl->get_base()->stripDeclarator(); |
---|
| 687 | if ( StructInstType *aggDecl = dynamic_cast< StructInstType * >( designatorType ) ) { |
---|
[cbce272] | 688 | return new StructDecl( aggDecl->get_name(), DeclarationNode::Struct, noAttributes, tyDecl->get_linkage() ); |
---|
[6f95000] | 689 | } else if ( UnionInstType *aggDecl = dynamic_cast< UnionInstType * >( designatorType ) ) { |
---|
[cbce272] | 690 | return new UnionDecl( aggDecl->get_name(), noAttributes, tyDecl->get_linkage() ); |
---|
[6f95000] | 691 | } else if ( EnumInstType *enumDecl = dynamic_cast< EnumInstType * >( designatorType ) ) { |
---|
[cbce272] | 692 | return new EnumDecl( enumDecl->get_name(), noAttributes, tyDecl->get_linkage() ); |
---|
[0dd3a2f] | 693 | } else { |
---|
[46f6134] | 694 | return ret->clone(); |
---|
[0dd3a2f] | 695 | } // if |
---|
[a08ba92] | 696 | } |
---|
[c8ffe20b] | 697 | |
---|
[85c4ef0] | 698 | TypeDecl *EliminateTypedef::mutate( TypeDecl * typeDecl ) { |
---|
[cc79d97] | 699 | TypedefMap::iterator i = typedefNames.find( typeDecl->get_name() ); |
---|
[0dd3a2f] | 700 | if ( i != typedefNames.end() ) { |
---|
| 701 | typedefNames.erase( i ) ; |
---|
| 702 | } // if |
---|
[679864e1] | 703 | |
---|
| 704 | typedeclNames[ typeDecl->get_name() ] = typeDecl; |
---|
[2c57025] | 705 | return Mutator::mutate( typeDecl ); |
---|
[a08ba92] | 706 | } |
---|
[c8ffe20b] | 707 | |
---|
[85c4ef0] | 708 | DeclarationWithType *EliminateTypedef::mutate( FunctionDecl * funcDecl ) { |
---|
[46f6134] | 709 | typedefNames.beginScope(); |
---|
[0dd3a2f] | 710 | DeclarationWithType *ret = Mutator::mutate( funcDecl ); |
---|
[46f6134] | 711 | typedefNames.endScope(); |
---|
[0dd3a2f] | 712 | return ret; |
---|
[a08ba92] | 713 | } |
---|
[c8ffe20b] | 714 | |
---|
[1db21619] | 715 | DeclarationWithType *EliminateTypedef::mutate( ObjectDecl * objDecl ) { |
---|
[46f6134] | 716 | typedefNames.beginScope(); |
---|
[1db21619] | 717 | DeclarationWithType *ret = Mutator::mutate( objDecl ); |
---|
[46f6134] | 718 | typedefNames.endScope(); |
---|
[dd020c0] | 719 | |
---|
| 720 | if ( FunctionType *funtype = dynamic_cast<FunctionType *>( ret->get_type() ) ) { // function type? |
---|
[02e5ab6] | 721 | // replace the current object declaration with a function declaration |
---|
[a7c90d4] | 722 | FunctionDecl * newDecl = new FunctionDecl( ret->get_name(), ret->get_storageClasses(), ret->get_linkage(), funtype, 0, objDecl->get_attributes(), ret->get_funcSpec() ); |
---|
[0a86a30] | 723 | objDecl->get_attributes().clear(); |
---|
[dbe8f244] | 724 | objDecl->set_type( nullptr ); |
---|
[0a86a30] | 725 | delete objDecl; |
---|
| 726 | return newDecl; |
---|
[1db21619] | 727 | } // if |
---|
[0dd3a2f] | 728 | return ret; |
---|
[a08ba92] | 729 | } |
---|
[c8ffe20b] | 730 | |
---|
[85c4ef0] | 731 | Expression *EliminateTypedef::mutate( CastExpr * castExpr ) { |
---|
[46f6134] | 732 | typedefNames.beginScope(); |
---|
[0dd3a2f] | 733 | Expression *ret = Mutator::mutate( castExpr ); |
---|
[46f6134] | 734 | typedefNames.endScope(); |
---|
[0dd3a2f] | 735 | return ret; |
---|
[a08ba92] | 736 | } |
---|
[c8ffe20b] | 737 | |
---|
[85c4ef0] | 738 | CompoundStmt *EliminateTypedef::mutate( CompoundStmt * compoundStmt ) { |
---|
[46f6134] | 739 | typedefNames.beginScope(); |
---|
[cc79d97] | 740 | scopeLevel += 1; |
---|
[0dd3a2f] | 741 | CompoundStmt *ret = Mutator::mutate( compoundStmt ); |
---|
[cc79d97] | 742 | scopeLevel -= 1; |
---|
[0dd3a2f] | 743 | std::list< Statement * >::iterator i = compoundStmt->get_kids().begin(); |
---|
| 744 | while ( i != compoundStmt->get_kids().end() ) { |
---|
[85c4ef0] | 745 | std::list< Statement * >::iterator next = i+1; |
---|
[0dd3a2f] | 746 | if ( DeclStmt *declStmt = dynamic_cast< DeclStmt * >( *i ) ) { |
---|
| 747 | if ( dynamic_cast< TypedefDecl * >( declStmt->get_decl() ) ) { |
---|
| 748 | delete *i; |
---|
| 749 | compoundStmt->get_kids().erase( i ); |
---|
| 750 | } // if |
---|
| 751 | } // if |
---|
| 752 | i = next; |
---|
| 753 | } // while |
---|
[46f6134] | 754 | typedefNames.endScope(); |
---|
[0dd3a2f] | 755 | return ret; |
---|
[a08ba92] | 756 | } |
---|
[85c4ef0] | 757 | |
---|
[43c89a7] | 758 | // there may be typedefs nested within aggregates. in order for everything to work properly, these should be removed |
---|
[45161b4d] | 759 | // as well |
---|
[85c4ef0] | 760 | template<typename AggDecl> |
---|
| 761 | AggDecl *EliminateTypedef::handleAggregate( AggDecl * aggDecl ) { |
---|
| 762 | std::list<Declaration *>::iterator it = aggDecl->get_members().begin(); |
---|
| 763 | for ( ; it != aggDecl->get_members().end(); ) { |
---|
| 764 | std::list< Declaration * >::iterator next = it+1; |
---|
| 765 | if ( dynamic_cast< TypedefDecl * >( *it ) ) { |
---|
| 766 | delete *it; |
---|
| 767 | aggDecl->get_members().erase( it ); |
---|
| 768 | } // if |
---|
| 769 | it = next; |
---|
| 770 | } |
---|
| 771 | return aggDecl; |
---|
| 772 | } |
---|
| 773 | |
---|
[45161b4d] | 774 | template<typename AggDecl> |
---|
| 775 | void EliminateTypedef::addImplicitTypedef( AggDecl * aggDecl ) { |
---|
| 776 | if ( typedefNames.count( aggDecl->get_name() ) == 0 ) { |
---|
[62e5546] | 777 | Type *type = nullptr; |
---|
[45161b4d] | 778 | if ( StructDecl * newDeclStructDecl = dynamic_cast< StructDecl * >( aggDecl ) ) { |
---|
| 779 | type = new StructInstType( Type::Qualifiers(), newDeclStructDecl->get_name() ); |
---|
| 780 | } else if ( UnionDecl * newDeclUnionDecl = dynamic_cast< UnionDecl * >( aggDecl ) ) { |
---|
| 781 | type = new UnionInstType( Type::Qualifiers(), newDeclUnionDecl->get_name() ); |
---|
| 782 | } else if ( EnumDecl * newDeclEnumDecl = dynamic_cast< EnumDecl * >( aggDecl ) ) { |
---|
| 783 | type = new EnumInstType( Type::Qualifiers(), newDeclEnumDecl->get_name() ); |
---|
| 784 | } // if |
---|
[cbce272] | 785 | TypedefDeclPtr tyDecl( new TypedefDecl( aggDecl->get_name(), Type::StorageClasses(), type, aggDecl->get_linkage() ) ); |
---|
[46f6134] | 786 | typedefNames[ aggDecl->get_name() ] = std::make_pair( std::move( tyDecl ), scopeLevel ); |
---|
[45161b4d] | 787 | } // if |
---|
| 788 | } |
---|
[4e06c1e] | 789 | |
---|
[85c4ef0] | 790 | Declaration *EliminateTypedef::mutate( StructDecl * structDecl ) { |
---|
[45161b4d] | 791 | addImplicitTypedef( structDecl ); |
---|
[85c4ef0] | 792 | Mutator::mutate( structDecl ); |
---|
| 793 | return handleAggregate( structDecl ); |
---|
| 794 | } |
---|
| 795 | |
---|
| 796 | Declaration *EliminateTypedef::mutate( UnionDecl * unionDecl ) { |
---|
[45161b4d] | 797 | addImplicitTypedef( unionDecl ); |
---|
[85c4ef0] | 798 | Mutator::mutate( unionDecl ); |
---|
| 799 | return handleAggregate( unionDecl ); |
---|
| 800 | } |
---|
| 801 | |
---|
| 802 | Declaration *EliminateTypedef::mutate( EnumDecl * enumDecl ) { |
---|
[45161b4d] | 803 | addImplicitTypedef( enumDecl ); |
---|
[85c4ef0] | 804 | Mutator::mutate( enumDecl ); |
---|
| 805 | return handleAggregate( enumDecl ); |
---|
| 806 | } |
---|
| 807 | |
---|
[45161b4d] | 808 | Declaration *EliminateTypedef::mutate( TraitDecl * contextDecl ) { |
---|
[85c4ef0] | 809 | Mutator::mutate( contextDecl ); |
---|
| 810 | return handleAggregate( contextDecl ); |
---|
| 811 | } |
---|
| 812 | |
---|
[d1969a6] | 813 | void VerifyCtorDtorAssign::verify( std::list< Declaration * > & translationUnit ) { |
---|
[0db6fc0] | 814 | PassVisitor<VerifyCtorDtorAssign> verifier; |
---|
[9cb8e88d] | 815 | acceptAll( translationUnit, verifier ); |
---|
| 816 | } |
---|
| 817 | |
---|
[0db6fc0] | 818 | void VerifyCtorDtorAssign::previsit( FunctionDecl * funcDecl ) { |
---|
[9cb8e88d] | 819 | FunctionType * funcType = funcDecl->get_functionType(); |
---|
| 820 | std::list< DeclarationWithType * > &returnVals = funcType->get_returnVals(); |
---|
| 821 | std::list< DeclarationWithType * > ¶ms = funcType->get_parameters(); |
---|
| 822 | |
---|
[d1969a6] | 823 | if ( InitTweak::isCtorDtorAssign( funcDecl->get_name() ) ) { |
---|
[9cb8e88d] | 824 | if ( params.size() == 0 ) { |
---|
[d1969a6] | 825 | throw SemanticError( "Constructors, destructors, and assignment functions require at least one parameter ", funcDecl ); |
---|
[9cb8e88d] | 826 | } |
---|
[ed8a0d2] | 827 | PointerType * ptrType = dynamic_cast< PointerType * >( params.front()->get_type() ); |
---|
| 828 | if ( ! ptrType || ptrType->is_array() ) { |
---|
[d1969a6] | 829 | throw SemanticError( "First parameter of a constructor, destructor, or assignment function must be a pointer ", funcDecl ); |
---|
[9cb8e88d] | 830 | } |
---|
[d1969a6] | 831 | if ( InitTweak::isCtorDtor( funcDecl->get_name() ) && returnVals.size() != 0 ) { |
---|
[9cb8e88d] | 832 | throw SemanticError( "Constructors and destructors cannot have explicit return values ", funcDecl ); |
---|
| 833 | } |
---|
| 834 | } |
---|
| 835 | } |
---|
[70a06f6] | 836 | |
---|
[11ab8ea8] | 837 | template< typename Aggr > |
---|
| 838 | void validateGeneric( Aggr * inst ) { |
---|
| 839 | std::list< TypeDecl * > * params = inst->get_baseParameters(); |
---|
[30f9072] | 840 | if ( params ) { |
---|
[11ab8ea8] | 841 | std::list< Expression * > & args = inst->get_parameters(); |
---|
[67cf18c] | 842 | |
---|
| 843 | // insert defaults arguments when a type argument is missing (currently only supports missing arguments at the end of the list). |
---|
| 844 | // A substitution is used to ensure that defaults are replaced correctly, e.g., |
---|
| 845 | // forall(otype T, otype alloc = heap_allocator(T)) struct vector; |
---|
| 846 | // vector(int) v; |
---|
| 847 | // after insertion of default values becomes |
---|
| 848 | // vector(int, heap_allocator(T)) |
---|
| 849 | // and the substitution is built with T=int so that after substitution, the result is |
---|
| 850 | // vector(int, heap_allocator(int)) |
---|
| 851 | TypeSubstitution sub; |
---|
| 852 | auto paramIter = params->begin(); |
---|
| 853 | for ( size_t i = 0; paramIter != params->end(); ++paramIter, ++i ) { |
---|
| 854 | if ( i < args.size() ) { |
---|
| 855 | TypeExpr * expr = safe_dynamic_cast< TypeExpr * >( *std::next( args.begin(), i ) ); |
---|
| 856 | sub.add( (*paramIter)->get_name(), expr->get_type()->clone() ); |
---|
| 857 | } else if ( i == args.size() ) { |
---|
| 858 | Type * defaultType = (*paramIter)->get_init(); |
---|
| 859 | if ( defaultType ) { |
---|
| 860 | args.push_back( new TypeExpr( defaultType->clone() ) ); |
---|
| 861 | sub.add( (*paramIter)->get_name(), defaultType->clone() ); |
---|
| 862 | } |
---|
| 863 | } |
---|
| 864 | } |
---|
| 865 | |
---|
| 866 | sub.apply( inst ); |
---|
[11ab8ea8] | 867 | if ( args.size() < params->size() ) throw SemanticError( "Too few type arguments in generic type ", inst ); |
---|
| 868 | if ( args.size() > params->size() ) throw SemanticError( "Too many type arguments in generic type ", inst ); |
---|
| 869 | } |
---|
| 870 | } |
---|
| 871 | |
---|
[0db6fc0] | 872 | void ValidateGenericParameters::previsit( StructInstType * inst ) { |
---|
[11ab8ea8] | 873 | validateGeneric( inst ); |
---|
| 874 | } |
---|
| 875 | |
---|
[0db6fc0] | 876 | void ValidateGenericParameters::previsit( UnionInstType * inst ) { |
---|
[11ab8ea8] | 877 | validateGeneric( inst ); |
---|
| 878 | } |
---|
| 879 | |
---|
[d24d4e1] | 880 | void CompoundLiteral::premutate( ObjectDecl *objectDecl ) { |
---|
[a7c90d4] | 881 | storageClasses = objectDecl->get_storageClasses(); |
---|
[630a82a] | 882 | } |
---|
| 883 | |
---|
[d24d4e1] | 884 | Expression *CompoundLiteral::postmutate( CompoundLiteralExpr *compLitExpr ) { |
---|
[630a82a] | 885 | // transform [storage_class] ... (struct S){ 3, ... }; |
---|
| 886 | // into [storage_class] struct S temp = { 3, ... }; |
---|
| 887 | static UniqueName indexName( "_compLit" ); |
---|
| 888 | |
---|
[d24d4e1] | 889 | ObjectDecl *tempvar = new ObjectDecl( indexName.newName(), storageClasses, LinkageSpec::C, nullptr, compLitExpr->get_result(), compLitExpr->get_initializer() ); |
---|
| 890 | compLitExpr->set_result( nullptr ); |
---|
| 891 | compLitExpr->set_initializer( nullptr ); |
---|
[630a82a] | 892 | delete compLitExpr; |
---|
[d24d4e1] | 893 | declsToAddBefore.push_back( tempvar ); // add modified temporary to current block |
---|
| 894 | return new VariableExpr( tempvar ); |
---|
[630a82a] | 895 | } |
---|
[cce9429] | 896 | |
---|
| 897 | void ReturnTypeFixer::fix( std::list< Declaration * > &translationUnit ) { |
---|
[0db6fc0] | 898 | PassVisitor<ReturnTypeFixer> fixer; |
---|
[cce9429] | 899 | acceptAll( translationUnit, fixer ); |
---|
| 900 | } |
---|
| 901 | |
---|
[0db6fc0] | 902 | void ReturnTypeFixer::postvisit( FunctionDecl * functionDecl ) { |
---|
[9facf3b] | 903 | FunctionType * ftype = functionDecl->get_functionType(); |
---|
| 904 | std::list< DeclarationWithType * > & retVals = ftype->get_returnVals(); |
---|
[56e49b0] | 905 | assertf( retVals.size() == 0 || retVals.size() == 1, "Function %s has too many return values: %zu", functionDecl->get_name().c_str(), retVals.size() ); |
---|
[9facf3b] | 906 | if ( retVals.size() == 1 ) { |
---|
[861799c] | 907 | // ensure all function return values have a name - use the name of the function to disambiguate (this also provides a nice bit of help for debugging). |
---|
| 908 | // ensure other return values have a name. |
---|
[9facf3b] | 909 | DeclarationWithType * ret = retVals.front(); |
---|
| 910 | if ( ret->get_name() == "" ) { |
---|
| 911 | ret->set_name( toString( "_retval_", CodeGen::genName( functionDecl ) ) ); |
---|
| 912 | } |
---|
[c6d2e93] | 913 | ret->get_attributes().push_back( new Attribute( "unused" ) ); |
---|
[9facf3b] | 914 | } |
---|
| 915 | } |
---|
[cce9429] | 916 | |
---|
[0db6fc0] | 917 | void ReturnTypeFixer::postvisit( FunctionType * ftype ) { |
---|
[cce9429] | 918 | // xxx - need to handle named return values - this information needs to be saved somehow |
---|
| 919 | // so that resolution has access to the names. |
---|
| 920 | // Note that this pass needs to happen early so that other passes which look for tuple types |
---|
| 921 | // find them in all of the right places, including function return types. |
---|
| 922 | std::list< DeclarationWithType * > & retVals = ftype->get_returnVals(); |
---|
| 923 | if ( retVals.size() > 1 ) { |
---|
| 924 | // generate a single return parameter which is the tuple of all of the return values |
---|
| 925 | TupleType * tupleType = safe_dynamic_cast< TupleType * >( ResolvExpr::extractResultType( ftype ) ); |
---|
| 926 | // ensure return value is not destructed by explicitly creating an empty ListInit node wherein maybeConstruct is false. |
---|
[68fe077a] | 927 | ObjectDecl * newRet = new ObjectDecl( "", Type::StorageClasses(), LinkageSpec::Cforall, 0, tupleType, new ListInit( std::list<Initializer*>(), noDesignators, false ) ); |
---|
[cce9429] | 928 | deleteAll( retVals ); |
---|
| 929 | retVals.clear(); |
---|
| 930 | retVals.push_back( newRet ); |
---|
| 931 | } |
---|
| 932 | } |
---|
[fbd7ad6] | 933 | |
---|
| 934 | void ArrayLength::computeLength( std::list< Declaration * > & translationUnit ) { |
---|
[0db6fc0] | 935 | PassVisitor<ArrayLength> len; |
---|
[fbd7ad6] | 936 | acceptAll( translationUnit, len ); |
---|
| 937 | } |
---|
| 938 | |
---|
[0db6fc0] | 939 | void ArrayLength::previsit( ObjectDecl * objDecl ) { |
---|
[fbd7ad6] | 940 | if ( ArrayType * at = dynamic_cast< ArrayType * >( objDecl->get_type() ) ) { |
---|
[30f9072] | 941 | if ( at->get_dimension() ) return; |
---|
[fbd7ad6] | 942 | if ( ListInit * init = dynamic_cast< ListInit * >( objDecl->get_init() ) ) { |
---|
| 943 | at->set_dimension( new ConstantExpr( Constant::from_ulong( init->get_initializers().size() ) ) ); |
---|
| 944 | } |
---|
| 945 | } |
---|
| 946 | } |
---|
[51b7345] | 947 | } // namespace SymTab |
---|
[0dd3a2f] | 948 | |
---|
| 949 | // Local Variables: // |
---|
| 950 | // tab-width: 4 // |
---|
| 951 | // mode: c++ // |
---|
| 952 | // compile-command: "make install" // |
---|
| 953 | // End: // |
---|