[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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[4e06c1e] | 11 | // Last Modified By : Peter A. Buhr |
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| 12 | // Last Modified On : Tue Jul 12 17:49:21 2016 |
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| 13 | // Update Count : 298 |
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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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| 40 | #include <list> |
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| 41 | #include <iterator> |
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[e491159] | 42 | #include "Common/ScopedMap.h" |
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[630a82a] | 43 | #include "Common/utility.h" |
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| 44 | #include "Common/UniqueName.h" |
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[51b7345] | 45 | #include "Validate.h" |
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| 46 | #include "SynTree/Visitor.h" |
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| 47 | #include "SynTree/Mutator.h" |
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| 48 | #include "SynTree/Type.h" |
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[630a82a] | 49 | #include "SynTree/Expression.h" |
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[51b7345] | 50 | #include "SynTree/Statement.h" |
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| 51 | #include "SynTree/TypeSubstitution.h" |
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[68cd1ce] | 52 | #include "Indexer.h" |
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[51b7345] | 53 | #include "FixFunction.h" |
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[cc79d97] | 54 | // #include "ImplementationType.h" |
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[630a82a] | 55 | #include "GenPoly/DeclMutator.h" |
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[51b7345] | 56 | #include "AddVisit.h" |
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[f6d7e0f] | 57 | #include "MakeLibCfa.h" |
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[cc79d97] | 58 | #include "TypeEquality.h" |
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[620cb95] | 59 | #include "Autogen.h" |
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[1cbca6e] | 60 | #include "ResolvExpr/typeops.h" |
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[79970ed] | 61 | #include <algorithm> |
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[d1969a6] | 62 | #include "InitTweak/InitTweak.h" |
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[9facf3b] | 63 | #include "CodeGen/CodeGenerator.h" |
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[51b7345] | 64 | |
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[c8ffe20b] | 65 | #define debugPrint( x ) if ( doDebug ) { std::cout << x; } |
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[51b7345] | 66 | |
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| 67 | namespace SymTab { |
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[9facf3b] | 68 | class HoistStruct final : public Visitor { |
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[a08ba92] | 69 | public: |
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[82dd287] | 70 | /// Flattens nested struct types |
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[0dd3a2f] | 71 | static void hoistStruct( std::list< Declaration * > &translationUnit ); |
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[9cb8e88d] | 72 | |
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[0dd3a2f] | 73 | std::list< Declaration * > &get_declsToAdd() { return declsToAdd; } |
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[9cb8e88d] | 74 | |
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[0dd3a2f] | 75 | virtual void visit( StructDecl *aggregateDecl ); |
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| 76 | virtual void visit( UnionDecl *aggregateDecl ); |
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[c8ffe20b] | 77 | |
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[0dd3a2f] | 78 | virtual void visit( CompoundStmt *compoundStmt ); |
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| 79 | virtual void visit( SwitchStmt *switchStmt ); |
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[a08ba92] | 80 | private: |
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[0dd3a2f] | 81 | HoistStruct(); |
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[c8ffe20b] | 82 | |
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[0dd3a2f] | 83 | template< typename AggDecl > void handleAggregate( AggDecl *aggregateDecl ); |
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[c8ffe20b] | 84 | |
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[0dd3a2f] | 85 | std::list< Declaration * > declsToAdd; |
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| 86 | bool inStruct; |
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[a08ba92] | 87 | }; |
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[c8ffe20b] | 88 | |
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[cce9429] | 89 | /// Fix return types so that every function returns exactly one value |
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[9facf3b] | 90 | class ReturnTypeFixer final : public Visitor { |
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[cce9429] | 91 | public: |
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[9facf3b] | 92 | |
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| 93 | typedef Visitor Parent; |
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| 94 | using Parent::visit; |
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| 95 | |
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[cce9429] | 96 | static void fix( std::list< Declaration * > &translationUnit ); |
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| 97 | |
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[9facf3b] | 98 | virtual void visit( FunctionDecl * functionDecl ); |
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| 99 | |
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[cce9429] | 100 | virtual void visit( FunctionType * ftype ); |
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| 101 | }; |
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| 102 | |
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[de91427b] | 103 | /// Replaces enum types by int, and function or array types in function parameter and return lists by appropriate pointers. |
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[9facf3b] | 104 | class EnumAndPointerDecayPass final : public Visitor { |
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[0dd3a2f] | 105 | typedef Visitor Parent; |
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| 106 | virtual void visit( EnumDecl *aggregateDecl ); |
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| 107 | virtual void visit( FunctionType *func ); |
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[a08ba92] | 108 | }; |
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[82dd287] | 109 | |
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| 110 | /// Associates forward declarations of aggregates with their definitions |
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[cce9429] | 111 | class LinkReferenceToTypes final : public Indexer { |
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[0dd3a2f] | 112 | typedef Indexer Parent; |
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[a08ba92] | 113 | public: |
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[cce9429] | 114 | LinkReferenceToTypes( bool doDebug, const Indexer *indexer ); |
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[a08ba92] | 115 | private: |
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[62e5546] | 116 | using Indexer::visit; |
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| 117 | void visit( StructInstType *structInst ) final; |
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| 118 | void visit( UnionInstType *unionInst ) final; |
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| 119 | void visit( TraitInstType *contextInst ) final; |
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| 120 | void visit( StructDecl *structDecl ) final; |
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| 121 | void visit( UnionDecl *unionDecl ) final; |
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| 122 | void visit( TypeInstType *typeInst ) final; |
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[0dd3a2f] | 123 | |
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| 124 | const Indexer *indexer; |
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[9cb8e88d] | 125 | |
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[0dd3a2f] | 126 | typedef std::map< std::string, std::list< StructInstType * > > ForwardStructsType; |
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| 127 | typedef std::map< std::string, std::list< UnionInstType * > > ForwardUnionsType; |
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| 128 | ForwardStructsType forwardStructs; |
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| 129 | ForwardUnionsType forwardUnions; |
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[a08ba92] | 130 | }; |
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[c8ffe20b] | 131 | |
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[82dd287] | 132 | /// Replaces array and function types in forall lists by appropriate pointer type |
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[a08ba92] | 133 | class Pass3 : public Indexer { |
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[0dd3a2f] | 134 | typedef Indexer Parent; |
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[a08ba92] | 135 | public: |
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[0dd3a2f] | 136 | Pass3( const Indexer *indexer ); |
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[a08ba92] | 137 | private: |
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[0dd3a2f] | 138 | virtual void visit( ObjectDecl *object ); |
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| 139 | virtual void visit( FunctionDecl *func ); |
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[c8ffe20b] | 140 | |
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[0dd3a2f] | 141 | const Indexer *indexer; |
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[a08ba92] | 142 | }; |
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[c8ffe20b] | 143 | |
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[de91427b] | 144 | class ReturnChecker : public Visitor { |
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| 145 | public: |
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| 146 | /// Checks that return statements return nothing if their return type is void |
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| 147 | /// and return something if the return type is non-void. |
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| 148 | static void checkFunctionReturns( std::list< Declaration * > & translationUnit ); |
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| 149 | private: |
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| 150 | virtual void visit( FunctionDecl * functionDecl ); |
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| 151 | |
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| 152 | virtual void visit( ReturnStmt * returnStmt ); |
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| 153 | |
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| 154 | std::list< DeclarationWithType * > returnVals; |
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| 155 | }; |
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| 156 | |
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[a08ba92] | 157 | class EliminateTypedef : public Mutator { |
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| 158 | public: |
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[de91427b] | 159 | EliminateTypedef() : scopeLevel( 0 ) {} |
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| 160 | /// Replaces typedefs by forward declarations |
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[0dd3a2f] | 161 | static void eliminateTypedef( std::list< Declaration * > &translationUnit ); |
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[a08ba92] | 162 | private: |
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[0dd3a2f] | 163 | virtual Declaration *mutate( TypedefDecl *typeDecl ); |
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| 164 | virtual TypeDecl *mutate( TypeDecl *typeDecl ); |
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| 165 | virtual DeclarationWithType *mutate( FunctionDecl *funcDecl ); |
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[1db21619] | 166 | virtual DeclarationWithType *mutate( ObjectDecl *objDecl ); |
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[0dd3a2f] | 167 | virtual CompoundStmt *mutate( CompoundStmt *compoundStmt ); |
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| 168 | virtual Type *mutate( TypeInstType *aggregateUseType ); |
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| 169 | virtual Expression *mutate( CastExpr *castExpr ); |
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[cc79d97] | 170 | |
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[85c4ef0] | 171 | virtual Declaration *mutate( StructDecl * structDecl ); |
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| 172 | virtual Declaration *mutate( UnionDecl * unionDecl ); |
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| 173 | virtual Declaration *mutate( EnumDecl * enumDecl ); |
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[4040425] | 174 | virtual Declaration *mutate( TraitDecl * contextDecl ); |
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[85c4ef0] | 175 | |
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| 176 | template<typename AggDecl> |
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| 177 | AggDecl *handleAggregate( AggDecl * aggDecl ); |
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| 178 | |
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[45161b4d] | 179 | template<typename AggDecl> |
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| 180 | void addImplicitTypedef( AggDecl * aggDecl ); |
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[70a06f6] | 181 | |
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[46f6134] | 182 | typedef std::unique_ptr<TypedefDecl> TypedefDeclPtr; |
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[e491159] | 183 | typedef ScopedMap< std::string, std::pair< TypedefDeclPtr, int > > TypedefMap; |
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[679864e1] | 184 | typedef std::map< std::string, TypeDecl * > TypeDeclMap; |
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[cc79d97] | 185 | TypedefMap typedefNames; |
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[679864e1] | 186 | TypeDeclMap typedeclNames; |
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[cc79d97] | 187 | int scopeLevel; |
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[a08ba92] | 188 | }; |
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[c8ffe20b] | 189 | |
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[d1969a6] | 190 | class VerifyCtorDtorAssign : public Visitor { |
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[9cb8e88d] | 191 | public: |
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[d1969a6] | 192 | /// ensure that constructors, destructors, and assignment have at least one |
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| 193 | /// parameter, the first of which must be a pointer, and that ctor/dtors have no |
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[9cb8e88d] | 194 | /// return values. |
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| 195 | static void verify( std::list< Declaration * > &translationUnit ); |
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| 196 | |
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| 197 | virtual void visit( FunctionDecl *funcDecl ); |
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[5f98ce5] | 198 | }; |
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[70a06f6] | 199 | |
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[62e5546] | 200 | class CompoundLiteral final : public GenPoly::DeclMutator { |
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[630a82a] | 201 | DeclarationNode::StorageClass storageclass = DeclarationNode::NoStorageClass; |
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| 202 | |
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[62e5546] | 203 | using GenPoly::DeclMutator::mutate; |
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| 204 | DeclarationWithType * mutate( ObjectDecl *objectDecl ) final; |
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| 205 | Expression *mutate( CompoundLiteralExpr *compLitExpr ) final; |
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[9cb8e88d] | 206 | }; |
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| 207 | |
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[a08ba92] | 208 | void validate( std::list< Declaration * > &translationUnit, bool doDebug ) { |
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[bda58ad] | 209 | EnumAndPointerDecayPass epc; |
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[cce9429] | 210 | LinkReferenceToTypes lrt( doDebug, 0 ); |
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[0dd3a2f] | 211 | Pass3 pass3( 0 ); |
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[630a82a] | 212 | CompoundLiteral compoundliteral; |
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| 213 | |
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[0dd3a2f] | 214 | EliminateTypedef::eliminateTypedef( translationUnit ); |
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| 215 | HoistStruct::hoistStruct( translationUnit ); |
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[cce9429] | 216 | ReturnTypeFixer::fix( translationUnit ); // must happen before autogen |
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[bda58ad] | 217 | autogenerateRoutines( translationUnit ); // moved up, used to be below compoundLiteral - currently needs EnumAndPointerDecayPass |
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| 218 | acceptAll( translationUnit, epc ); |
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[cce9429] | 219 | acceptAll( translationUnit, lrt ); |
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[de91427b] | 220 | ReturnChecker::checkFunctionReturns( translationUnit ); |
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[40e636a] | 221 | compoundliteral.mutateDeclarationList( translationUnit ); |
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[0dd3a2f] | 222 | acceptAll( translationUnit, pass3 ); |
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[d1969a6] | 223 | VerifyCtorDtorAssign::verify( translationUnit ); |
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[a08ba92] | 224 | } |
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[9cb8e88d] | 225 | |
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[a08ba92] | 226 | void validateType( Type *type, const Indexer *indexer ) { |
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[bda58ad] | 227 | EnumAndPointerDecayPass epc; |
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[cce9429] | 228 | LinkReferenceToTypes lrt( false, indexer ); |
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[0dd3a2f] | 229 | Pass3 pass3( indexer ); |
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[bda58ad] | 230 | type->accept( epc ); |
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[cce9429] | 231 | type->accept( lrt ); |
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[0dd3a2f] | 232 | type->accept( pass3 ); |
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[a08ba92] | 233 | } |
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[c8ffe20b] | 234 | |
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[a08ba92] | 235 | void HoistStruct::hoistStruct( std::list< Declaration * > &translationUnit ) { |
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[0dd3a2f] | 236 | HoistStruct hoister; |
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| 237 | acceptAndAdd( translationUnit, hoister, true ); |
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[a08ba92] | 238 | } |
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[c8ffe20b] | 239 | |
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[a08ba92] | 240 | HoistStruct::HoistStruct() : inStruct( false ) { |
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| 241 | } |
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[c8ffe20b] | 242 | |
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[a08ba92] | 243 | void filter( std::list< Declaration * > &declList, bool (*pred)( Declaration * ), bool doDelete ) { |
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[0dd3a2f] | 244 | std::list< Declaration * >::iterator i = declList.begin(); |
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| 245 | while ( i != declList.end() ) { |
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| 246 | std::list< Declaration * >::iterator next = i; |
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| 247 | ++next; |
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| 248 | if ( pred( *i ) ) { |
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| 249 | if ( doDelete ) { |
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| 250 | delete *i; |
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| 251 | } // if |
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| 252 | declList.erase( i ); |
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| 253 | } // if |
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| 254 | i = next; |
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| 255 | } // while |
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[a08ba92] | 256 | } |
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[c8ffe20b] | 257 | |
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[a08ba92] | 258 | bool isStructOrUnion( Declaration *decl ) { |
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[0dd3a2f] | 259 | return dynamic_cast< StructDecl * >( decl ) || dynamic_cast< UnionDecl * >( decl ); |
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[a08ba92] | 260 | } |
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[b3b2077] | 261 | // xxx - shouldn't this be declsToAddBefore? |
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[a08ba92] | 262 | template< typename AggDecl > |
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| 263 | void HoistStruct::handleAggregate( AggDecl *aggregateDecl ) { |
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[0dd3a2f] | 264 | if ( inStruct ) { |
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| 265 | // Add elements in stack order corresponding to nesting structure. |
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| 266 | declsToAdd.push_front( aggregateDecl ); |
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| 267 | Visitor::visit( aggregateDecl ); |
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| 268 | } else { |
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| 269 | inStruct = true; |
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| 270 | Visitor::visit( aggregateDecl ); |
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| 271 | inStruct = false; |
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| 272 | } // if |
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| 273 | // Always remove the hoisted aggregate from the inner structure. |
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| 274 | filter( aggregateDecl->get_members(), isStructOrUnion, false ); |
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[a08ba92] | 275 | } |
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[c8ffe20b] | 276 | |
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[a08ba92] | 277 | void HoistStruct::visit( StructDecl *aggregateDecl ) { |
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[0dd3a2f] | 278 | handleAggregate( aggregateDecl ); |
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[a08ba92] | 279 | } |
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[c8ffe20b] | 280 | |
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[a08ba92] | 281 | void HoistStruct::visit( UnionDecl *aggregateDecl ) { |
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[0dd3a2f] | 282 | handleAggregate( aggregateDecl ); |
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[a08ba92] | 283 | } |
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[c8ffe20b] | 284 | |
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[a08ba92] | 285 | void HoistStruct::visit( CompoundStmt *compoundStmt ) { |
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[0dd3a2f] | 286 | addVisit( compoundStmt, *this ); |
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[a08ba92] | 287 | } |
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[c8ffe20b] | 288 | |
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[a08ba92] | 289 | void HoistStruct::visit( SwitchStmt *switchStmt ) { |
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[0dd3a2f] | 290 | addVisit( switchStmt, *this ); |
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[a08ba92] | 291 | } |
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[c8ffe20b] | 292 | |
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[bda58ad] | 293 | void EnumAndPointerDecayPass::visit( EnumDecl *enumDecl ) { |
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[0dd3a2f] | 294 | // Set the type of each member of the enumeration to be EnumConstant |
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| 295 | for ( std::list< Declaration * >::iterator i = enumDecl->get_members().begin(); i != enumDecl->get_members().end(); ++i ) { |
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[f6d7e0f] | 296 | ObjectDecl * obj = dynamic_cast< ObjectDecl * >( *i ); |
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[0dd3a2f] | 297 | assert( obj ); |
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[a436947] | 298 | obj->set_type( new EnumInstType( Type::Qualifiers( true, false, false, false, false, false ), enumDecl->get_name() ) ); |
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[0dd3a2f] | 299 | } // for |
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| 300 | Parent::visit( enumDecl ); |
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[a08ba92] | 301 | } |
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[51b7345] | 302 | |
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[a08ba92] | 303 | namespace { |
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[83de11e] | 304 | template< typename DWTList > |
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| 305 | void fixFunctionList( DWTList & dwts, FunctionType * func ) { |
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[0dd3a2f] | 306 | // 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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| 307 | // entirely other fix ups are handled by the FixFunction class |
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[83de11e] | 308 | typedef typename DWTList::iterator DWTIterator; |
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| 309 | DWTIterator begin( dwts.begin() ), end( dwts.end() ); |
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[0dd3a2f] | 310 | if ( begin == end ) return; |
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| 311 | FixFunction fixer; |
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| 312 | DWTIterator i = begin; |
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[83de11e] | 313 | *i = (*i)->acceptMutator( fixer ); |
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[0dd3a2f] | 314 | if ( fixer.get_isVoid() ) { |
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| 315 | DWTIterator j = i; |
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| 316 | ++i; |
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[bda58ad] | 317 | delete *j; |
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[83de11e] | 318 | dwts.erase( j ); |
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[9cb8e88d] | 319 | if ( i != end ) { |
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[0dd3a2f] | 320 | throw SemanticError( "invalid type void in function type ", func ); |
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| 321 | } // if |
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| 322 | } else { |
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| 323 | ++i; |
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| 324 | for ( ; i != end; ++i ) { |
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| 325 | FixFunction fixer; |
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| 326 | *i = (*i )->acceptMutator( fixer ); |
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| 327 | if ( fixer.get_isVoid() ) { |
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| 328 | throw SemanticError( "invalid type void in function type ", func ); |
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| 329 | } // if |
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| 330 | } // for |
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| 331 | } // if |
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| 332 | } |
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[a08ba92] | 333 | } |
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[c8ffe20b] | 334 | |
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[bda58ad] | 335 | void EnumAndPointerDecayPass::visit( FunctionType *func ) { |
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[0dd3a2f] | 336 | // Fix up parameters and return types |
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[83de11e] | 337 | fixFunctionList( func->get_parameters(), func ); |
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| 338 | fixFunctionList( func->get_returnVals(), func ); |
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[0dd3a2f] | 339 | Visitor::visit( func ); |
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[a08ba92] | 340 | } |
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[c8ffe20b] | 341 | |
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[cce9429] | 342 | LinkReferenceToTypes::LinkReferenceToTypes( bool doDebug, const Indexer *other_indexer ) : Indexer( doDebug ) { |
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[0dd3a2f] | 343 | if ( other_indexer ) { |
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| 344 | indexer = other_indexer; |
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| 345 | } else { |
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| 346 | indexer = this; |
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| 347 | } // if |
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[a08ba92] | 348 | } |
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[c8ffe20b] | 349 | |
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[cce9429] | 350 | void LinkReferenceToTypes::visit( StructInstType *structInst ) { |
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[0dd3a2f] | 351 | Parent::visit( structInst ); |
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| 352 | StructDecl *st = indexer->lookupStruct( structInst->get_name() ); |
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| 353 | // it's not a semantic error if the struct is not found, just an implicit forward declaration |
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| 354 | if ( st ) { |
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[98735ef] | 355 | //assert( ! structInst->get_baseStruct() || structInst->get_baseStruct()->get_members().empty() || ! st->get_members().empty() ); |
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[0dd3a2f] | 356 | structInst->set_baseStruct( st ); |
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| 357 | } // if |
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| 358 | if ( ! st || st->get_members().empty() ) { |
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| 359 | // use of forward declaration |
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| 360 | forwardStructs[ structInst->get_name() ].push_back( structInst ); |
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| 361 | } // if |
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[a08ba92] | 362 | } |
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[c8ffe20b] | 363 | |
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[cce9429] | 364 | void LinkReferenceToTypes::visit( UnionInstType *unionInst ) { |
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[0dd3a2f] | 365 | Parent::visit( unionInst ); |
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| 366 | UnionDecl *un = indexer->lookupUnion( unionInst->get_name() ); |
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| 367 | // it's not a semantic error if the union is not found, just an implicit forward declaration |
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| 368 | if ( un ) { |
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| 369 | unionInst->set_baseUnion( un ); |
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| 370 | } // if |
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| 371 | if ( ! un || un->get_members().empty() ) { |
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| 372 | // use of forward declaration |
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| 373 | forwardUnions[ unionInst->get_name() ].push_back( unionInst ); |
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| 374 | } // if |
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[a08ba92] | 375 | } |
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[c8ffe20b] | 376 | |
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[cce9429] | 377 | void LinkReferenceToTypes::visit( TraitInstType *contextInst ) { |
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[0dd3a2f] | 378 | Parent::visit( contextInst ); |
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[2c57025] | 379 | if ( contextInst->get_name() == "sized" ) { |
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| 380 | // "sized" is a special trait with no members - just flick the sized status on for the type variable |
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| 381 | if ( contextInst->get_parameters().size() != 1 ) { |
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| 382 | throw SemanticError( "incorrect number of context parameters: ", contextInst ); |
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| 383 | } |
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| 384 | TypeExpr * param = safe_dynamic_cast< TypeExpr * > ( contextInst->get_parameters().front() ); |
---|
| 385 | TypeInstType * inst = safe_dynamic_cast< TypeInstType * > ( param->get_type() ); |
---|
| 386 | TypeDecl * decl = inst->get_baseType(); |
---|
| 387 | decl->set_sized( true ); |
---|
| 388 | // since "sized" is special, the next few steps don't apply |
---|
| 389 | return; |
---|
| 390 | } |
---|
[4040425] | 391 | TraitDecl *ctx = indexer->lookupTrait( contextInst->get_name() ); |
---|
[0dd3a2f] | 392 | if ( ! ctx ) { |
---|
| 393 | throw SemanticError( "use of undeclared context " + contextInst->get_name() ); |
---|
[17cd4eb] | 394 | } // if |
---|
[0dd3a2f] | 395 | for ( std::list< TypeDecl * >::const_iterator i = ctx->get_parameters().begin(); i != ctx->get_parameters().end(); ++i ) { |
---|
| 396 | for ( std::list< DeclarationWithType * >::const_iterator assert = (*i )->get_assertions().begin(); assert != (*i )->get_assertions().end(); ++assert ) { |
---|
[4040425] | 397 | if ( TraitInstType *otherCtx = dynamic_cast< TraitInstType * >(*assert ) ) { |
---|
[0dd3a2f] | 398 | cloneAll( otherCtx->get_members(), contextInst->get_members() ); |
---|
| 399 | } else { |
---|
| 400 | contextInst->get_members().push_back( (*assert )->clone() ); |
---|
| 401 | } // if |
---|
| 402 | } // for |
---|
| 403 | } // for |
---|
[51b986f] | 404 | |
---|
| 405 | if ( ctx->get_parameters().size() != contextInst->get_parameters().size() ) { |
---|
| 406 | throw SemanticError( "incorrect number of context parameters: ", contextInst ); |
---|
| 407 | } // if |
---|
| 408 | |
---|
[79970ed] | 409 | // need to clone members of the context for ownership purposes |
---|
| 410 | std::list< Declaration * > members; |
---|
| 411 | std::transform( ctx->get_members().begin(), ctx->get_members().end(), back_inserter( members ), [](Declaration * dwt) { return dwt->clone(); } ); |
---|
| 412 | |
---|
| 413 | applySubstitution( ctx->get_parameters().begin(), ctx->get_parameters().end(), contextInst->get_parameters().begin(), members.begin(), members.end(), back_inserter( contextInst->get_members() ) ); |
---|
[a08ba92] | 414 | } |
---|
[c8ffe20b] | 415 | |
---|
[cce9429] | 416 | void LinkReferenceToTypes::visit( StructDecl *structDecl ) { |
---|
[677c1be] | 417 | // visit struct members first so that the types of self-referencing members are updated properly |
---|
| 418 | Parent::visit( structDecl ); |
---|
[0dd3a2f] | 419 | if ( ! structDecl->get_members().empty() ) { |
---|
| 420 | ForwardStructsType::iterator fwds = forwardStructs.find( structDecl->get_name() ); |
---|
| 421 | if ( fwds != forwardStructs.end() ) { |
---|
| 422 | for ( std::list< StructInstType * >::iterator inst = fwds->second.begin(); inst != fwds->second.end(); ++inst ) { |
---|
| 423 | (*inst )->set_baseStruct( structDecl ); |
---|
| 424 | } // for |
---|
| 425 | forwardStructs.erase( fwds ); |
---|
| 426 | } // if |
---|
| 427 | } // if |
---|
[a08ba92] | 428 | } |
---|
[c8ffe20b] | 429 | |
---|
[cce9429] | 430 | void LinkReferenceToTypes::visit( UnionDecl *unionDecl ) { |
---|
[677c1be] | 431 | Parent::visit( unionDecl ); |
---|
[0dd3a2f] | 432 | if ( ! unionDecl->get_members().empty() ) { |
---|
| 433 | ForwardUnionsType::iterator fwds = forwardUnions.find( unionDecl->get_name() ); |
---|
| 434 | if ( fwds != forwardUnions.end() ) { |
---|
| 435 | for ( std::list< UnionInstType * >::iterator inst = fwds->second.begin(); inst != fwds->second.end(); ++inst ) { |
---|
| 436 | (*inst )->set_baseUnion( unionDecl ); |
---|
| 437 | } // for |
---|
| 438 | forwardUnions.erase( fwds ); |
---|
| 439 | } // if |
---|
| 440 | } // if |
---|
[a08ba92] | 441 | } |
---|
[c8ffe20b] | 442 | |
---|
[cce9429] | 443 | void LinkReferenceToTypes::visit( TypeInstType *typeInst ) { |
---|
[0dd3a2f] | 444 | if ( NamedTypeDecl *namedTypeDecl = lookupType( typeInst->get_name() ) ) { |
---|
| 445 | if ( TypeDecl *typeDecl = dynamic_cast< TypeDecl * >( namedTypeDecl ) ) { |
---|
| 446 | typeInst->set_isFtype( typeDecl->get_kind() == TypeDecl::Ftype ); |
---|
| 447 | } // if |
---|
| 448 | } // if |
---|
[a08ba92] | 449 | } |
---|
[c8ffe20b] | 450 | |
---|
[a08ba92] | 451 | Pass3::Pass3( const Indexer *other_indexer ) : Indexer( false ) { |
---|
[0dd3a2f] | 452 | if ( other_indexer ) { |
---|
| 453 | indexer = other_indexer; |
---|
| 454 | } else { |
---|
| 455 | indexer = this; |
---|
| 456 | } // if |
---|
[a08ba92] | 457 | } |
---|
[c8ffe20b] | 458 | |
---|
[82dd287] | 459 | /// Fix up assertions |
---|
[a08ba92] | 460 | void forallFixer( Type *func ) { |
---|
[8c49c0e] | 461 | for ( Type::ForallList::iterator type = func->get_forall().begin(); type != func->get_forall().end(); ++type ) { |
---|
[0dd3a2f] | 462 | std::list< DeclarationWithType * > toBeDone, nextRound; |
---|
| 463 | toBeDone.splice( toBeDone.end(), (*type )->get_assertions() ); |
---|
| 464 | while ( ! toBeDone.empty() ) { |
---|
| 465 | for ( std::list< DeclarationWithType * >::iterator assertion = toBeDone.begin(); assertion != toBeDone.end(); ++assertion ) { |
---|
[4040425] | 466 | if ( TraitInstType *ctx = dynamic_cast< TraitInstType * >( (*assertion )->get_type() ) ) { |
---|
[0dd3a2f] | 467 | for ( std::list< Declaration * >::const_iterator i = ctx->get_members().begin(); i != ctx->get_members().end(); ++i ) { |
---|
| 468 | DeclarationWithType *dwt = dynamic_cast< DeclarationWithType * >( *i ); |
---|
| 469 | assert( dwt ); |
---|
| 470 | nextRound.push_back( dwt->clone() ); |
---|
| 471 | } |
---|
| 472 | delete ctx; |
---|
| 473 | } else { |
---|
| 474 | FixFunction fixer; |
---|
| 475 | *assertion = (*assertion )->acceptMutator( fixer ); |
---|
| 476 | if ( fixer.get_isVoid() ) { |
---|
| 477 | throw SemanticError( "invalid type void in assertion of function ", func ); |
---|
| 478 | } |
---|
| 479 | (*type )->get_assertions().push_back( *assertion ); |
---|
| 480 | } // if |
---|
| 481 | } // for |
---|
| 482 | toBeDone.clear(); |
---|
| 483 | toBeDone.splice( toBeDone.end(), nextRound ); |
---|
| 484 | } // while |
---|
| 485 | } // for |
---|
[a08ba92] | 486 | } |
---|
[c8ffe20b] | 487 | |
---|
[a08ba92] | 488 | void Pass3::visit( ObjectDecl *object ) { |
---|
[0dd3a2f] | 489 | forallFixer( object->get_type() ); |
---|
| 490 | if ( PointerType *pointer = dynamic_cast< PointerType * >( object->get_type() ) ) { |
---|
| 491 | forallFixer( pointer->get_base() ); |
---|
| 492 | } // if |
---|
| 493 | Parent::visit( object ); |
---|
| 494 | object->fixUniqueId(); |
---|
[a08ba92] | 495 | } |
---|
[c8ffe20b] | 496 | |
---|
[a08ba92] | 497 | void Pass3::visit( FunctionDecl *func ) { |
---|
[0dd3a2f] | 498 | forallFixer( func->get_type() ); |
---|
| 499 | Parent::visit( func ); |
---|
| 500 | func->fixUniqueId(); |
---|
[a08ba92] | 501 | } |
---|
[c8ffe20b] | 502 | |
---|
[de91427b] | 503 | void ReturnChecker::checkFunctionReturns( std::list< Declaration * > & translationUnit ) { |
---|
| 504 | ReturnChecker checker; |
---|
| 505 | acceptAll( translationUnit, checker ); |
---|
| 506 | } |
---|
| 507 | |
---|
| 508 | void ReturnChecker::visit( FunctionDecl * functionDecl ) { |
---|
| 509 | std::list< DeclarationWithType * > oldReturnVals = returnVals; |
---|
| 510 | returnVals = functionDecl->get_functionType()->get_returnVals(); |
---|
| 511 | Visitor::visit( functionDecl ); |
---|
| 512 | returnVals = oldReturnVals; |
---|
| 513 | } |
---|
| 514 | |
---|
| 515 | void ReturnChecker::visit( ReturnStmt * returnStmt ) { |
---|
[74d1804] | 516 | // Previously this also checked for the existence of an expr paired with no return values on |
---|
| 517 | // the function return type. This is incorrect, since you can have an expression attached to |
---|
| 518 | // a return statement in a void-returning function in C. The expression is treated as if it |
---|
| 519 | // were cast to void. |
---|
[de91427b] | 520 | if ( returnStmt->get_expr() == NULL && returnVals.size() != 0 ) { |
---|
| 521 | throw SemanticError( "Non-void function returns no values: " , returnStmt ); |
---|
| 522 | } |
---|
| 523 | } |
---|
| 524 | |
---|
| 525 | |
---|
[a08ba92] | 526 | bool isTypedef( Declaration *decl ) { |
---|
[0dd3a2f] | 527 | return dynamic_cast< TypedefDecl * >( decl ); |
---|
[a08ba92] | 528 | } |
---|
[c8ffe20b] | 529 | |
---|
[a08ba92] | 530 | void EliminateTypedef::eliminateTypedef( std::list< Declaration * > &translationUnit ) { |
---|
[0dd3a2f] | 531 | EliminateTypedef eliminator; |
---|
| 532 | mutateAll( translationUnit, eliminator ); |
---|
[5f98ce5] | 533 | if ( eliminator.typedefNames.count( "size_t" ) ) { |
---|
| 534 | // grab and remember declaration of size_t |
---|
| 535 | SizeType = eliminator.typedefNames["size_t"].first->get_base()->clone(); |
---|
| 536 | } else { |
---|
[40e636a] | 537 | // xxx - missing global typedef for size_t - default to long unsigned int, even though that may be wrong |
---|
| 538 | // eventually should have a warning for this case. |
---|
| 539 | SizeType = new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt ); |
---|
[5f98ce5] | 540 | } |
---|
[0dd3a2f] | 541 | filter( translationUnit, isTypedef, true ); |
---|
[5f98ce5] | 542 | |
---|
[a08ba92] | 543 | } |
---|
[c8ffe20b] | 544 | |
---|
[85c4ef0] | 545 | Type *EliminateTypedef::mutate( TypeInstType * typeInst ) { |
---|
[9cb8e88d] | 546 | // instances of typedef types will come here. If it is an instance |
---|
[cc79d97] | 547 | // of a typdef type, link the instance to its actual type. |
---|
| 548 | TypedefMap::const_iterator def = typedefNames.find( typeInst->get_name() ); |
---|
[0dd3a2f] | 549 | if ( def != typedefNames.end() ) { |
---|
[cc79d97] | 550 | Type *ret = def->second.first->get_base()->clone(); |
---|
[0dd3a2f] | 551 | ret->get_qualifiers() += typeInst->get_qualifiers(); |
---|
[0215a76f] | 552 | // place instance parameters on the typedef'd type |
---|
| 553 | if ( ! typeInst->get_parameters().empty() ) { |
---|
| 554 | ReferenceToType *rtt = dynamic_cast<ReferenceToType*>(ret); |
---|
| 555 | if ( ! rtt ) { |
---|
| 556 | throw SemanticError("cannot apply type parameters to base type of " + typeInst->get_name()); |
---|
| 557 | } |
---|
| 558 | rtt->get_parameters().clear(); |
---|
[b644d6f] | 559 | cloneAll( typeInst->get_parameters(), rtt->get_parameters() ); |
---|
| 560 | mutateAll( rtt->get_parameters(), *this ); // recursively fix typedefs on parameters |
---|
[1db21619] | 561 | } // if |
---|
[0dd3a2f] | 562 | delete typeInst; |
---|
| 563 | return ret; |
---|
[679864e1] | 564 | } else { |
---|
| 565 | TypeDeclMap::const_iterator base = typedeclNames.find( typeInst->get_name() ); |
---|
| 566 | assert( base != typedeclNames.end() ); |
---|
[1e8b02f5] | 567 | typeInst->set_baseType( base->second ); |
---|
[0dd3a2f] | 568 | } // if |
---|
| 569 | return typeInst; |
---|
[a08ba92] | 570 | } |
---|
[c8ffe20b] | 571 | |
---|
[85c4ef0] | 572 | Declaration *EliminateTypedef::mutate( TypedefDecl * tyDecl ) { |
---|
[0dd3a2f] | 573 | Declaration *ret = Mutator::mutate( tyDecl ); |
---|
[5f98ce5] | 574 | |
---|
[cc79d97] | 575 | if ( typedefNames.count( tyDecl->get_name() ) == 1 && typedefNames[ tyDecl->get_name() ].second == scopeLevel ) { |
---|
[9cb8e88d] | 576 | // typedef to the same name from the same scope |
---|
[cc79d97] | 577 | // must be from the same type |
---|
| 578 | |
---|
| 579 | Type * t1 = tyDecl->get_base(); |
---|
| 580 | Type * t2 = typedefNames[ tyDecl->get_name() ].first->get_base(); |
---|
[1cbca6e] | 581 | if ( ! ResolvExpr::typesCompatible( t1, t2, Indexer() ) ) { |
---|
[cc79d97] | 582 | throw SemanticError( "cannot redefine typedef: " + tyDecl->get_name() ); |
---|
[85c4ef0] | 583 | } |
---|
[cc79d97] | 584 | } else { |
---|
[46f6134] | 585 | typedefNames[ tyDecl->get_name() ] = std::make_pair( TypedefDeclPtr( tyDecl ), scopeLevel ); |
---|
[cc79d97] | 586 | } // if |
---|
| 587 | |
---|
[0dd3a2f] | 588 | // When a typedef is a forward declaration: |
---|
| 589 | // typedef struct screen SCREEN; |
---|
| 590 | // the declaration portion must be retained: |
---|
| 591 | // struct screen; |
---|
| 592 | // because the expansion of the typedef is: |
---|
| 593 | // void rtn( SCREEN *p ) => void rtn( struct screen *p ) |
---|
| 594 | // hence the type-name "screen" must be defined. |
---|
| 595 | // Note, qualifiers on the typedef are superfluous for the forward declaration. |
---|
| 596 | if ( StructInstType *aggDecl = dynamic_cast< StructInstType * >( tyDecl->get_base() ) ) { |
---|
| 597 | return new StructDecl( aggDecl->get_name() ); |
---|
| 598 | } else if ( UnionInstType *aggDecl = dynamic_cast< UnionInstType * >( tyDecl->get_base() ) ) { |
---|
| 599 | return new UnionDecl( aggDecl->get_name() ); |
---|
[956a9c7] | 600 | } else if ( EnumInstType *enumDecl = dynamic_cast< EnumInstType * >( tyDecl->get_base() ) ) { |
---|
| 601 | return new EnumDecl( enumDecl->get_name() ); |
---|
[0dd3a2f] | 602 | } else { |
---|
[46f6134] | 603 | return ret->clone(); |
---|
[0dd3a2f] | 604 | } // if |
---|
[a08ba92] | 605 | } |
---|
[c8ffe20b] | 606 | |
---|
[85c4ef0] | 607 | TypeDecl *EliminateTypedef::mutate( TypeDecl * typeDecl ) { |
---|
[cc79d97] | 608 | TypedefMap::iterator i = typedefNames.find( typeDecl->get_name() ); |
---|
[0dd3a2f] | 609 | if ( i != typedefNames.end() ) { |
---|
| 610 | typedefNames.erase( i ) ; |
---|
| 611 | } // if |
---|
[679864e1] | 612 | |
---|
| 613 | typedeclNames[ typeDecl->get_name() ] = typeDecl; |
---|
[2c57025] | 614 | return Mutator::mutate( typeDecl ); |
---|
[a08ba92] | 615 | } |
---|
[c8ffe20b] | 616 | |
---|
[85c4ef0] | 617 | DeclarationWithType *EliminateTypedef::mutate( FunctionDecl * funcDecl ) { |
---|
[46f6134] | 618 | typedefNames.beginScope(); |
---|
[0dd3a2f] | 619 | DeclarationWithType *ret = Mutator::mutate( funcDecl ); |
---|
[46f6134] | 620 | typedefNames.endScope(); |
---|
[0dd3a2f] | 621 | return ret; |
---|
[a08ba92] | 622 | } |
---|
[c8ffe20b] | 623 | |
---|
[1db21619] | 624 | DeclarationWithType *EliminateTypedef::mutate( ObjectDecl * objDecl ) { |
---|
[46f6134] | 625 | typedefNames.beginScope(); |
---|
[1db21619] | 626 | DeclarationWithType *ret = Mutator::mutate( objDecl ); |
---|
[46f6134] | 627 | typedefNames.endScope(); |
---|
[02e5ab6] | 628 | // is the type a function? |
---|
[1db21619] | 629 | if ( FunctionType *funtype = dynamic_cast<FunctionType *>( ret->get_type() ) ) { |
---|
[02e5ab6] | 630 | // replace the current object declaration with a function declaration |
---|
[1db21619] | 631 | return new FunctionDecl( ret->get_name(), ret->get_storageClass(), ret->get_linkage(), funtype, 0, ret->get_isInline(), ret->get_isNoreturn() ); |
---|
| 632 | } else if ( objDecl->get_isInline() || objDecl->get_isNoreturn() ) { |
---|
| 633 | throw SemanticError( "invalid inline or _Noreturn specification in declaration of ", objDecl ); |
---|
| 634 | } // if |
---|
[0dd3a2f] | 635 | return ret; |
---|
[a08ba92] | 636 | } |
---|
[c8ffe20b] | 637 | |
---|
[85c4ef0] | 638 | Expression *EliminateTypedef::mutate( CastExpr * castExpr ) { |
---|
[46f6134] | 639 | typedefNames.beginScope(); |
---|
[0dd3a2f] | 640 | Expression *ret = Mutator::mutate( castExpr ); |
---|
[46f6134] | 641 | typedefNames.endScope(); |
---|
[0dd3a2f] | 642 | return ret; |
---|
[a08ba92] | 643 | } |
---|
[c8ffe20b] | 644 | |
---|
[85c4ef0] | 645 | CompoundStmt *EliminateTypedef::mutate( CompoundStmt * compoundStmt ) { |
---|
[46f6134] | 646 | typedefNames.beginScope(); |
---|
[cc79d97] | 647 | scopeLevel += 1; |
---|
[0dd3a2f] | 648 | CompoundStmt *ret = Mutator::mutate( compoundStmt ); |
---|
[cc79d97] | 649 | scopeLevel -= 1; |
---|
[0dd3a2f] | 650 | std::list< Statement * >::iterator i = compoundStmt->get_kids().begin(); |
---|
| 651 | while ( i != compoundStmt->get_kids().end() ) { |
---|
[85c4ef0] | 652 | std::list< Statement * >::iterator next = i+1; |
---|
[0dd3a2f] | 653 | if ( DeclStmt *declStmt = dynamic_cast< DeclStmt * >( *i ) ) { |
---|
| 654 | if ( dynamic_cast< TypedefDecl * >( declStmt->get_decl() ) ) { |
---|
| 655 | delete *i; |
---|
| 656 | compoundStmt->get_kids().erase( i ); |
---|
| 657 | } // if |
---|
| 658 | } // if |
---|
| 659 | i = next; |
---|
| 660 | } // while |
---|
[46f6134] | 661 | typedefNames.endScope(); |
---|
[0dd3a2f] | 662 | return ret; |
---|
[a08ba92] | 663 | } |
---|
[85c4ef0] | 664 | |
---|
[45161b4d] | 665 | // there may be typedefs nested within aggregates in order for everything to work properly, these should be removed |
---|
| 666 | // as well |
---|
[85c4ef0] | 667 | template<typename AggDecl> |
---|
| 668 | AggDecl *EliminateTypedef::handleAggregate( AggDecl * aggDecl ) { |
---|
| 669 | std::list<Declaration *>::iterator it = aggDecl->get_members().begin(); |
---|
| 670 | for ( ; it != aggDecl->get_members().end(); ) { |
---|
| 671 | std::list< Declaration * >::iterator next = it+1; |
---|
| 672 | if ( dynamic_cast< TypedefDecl * >( *it ) ) { |
---|
| 673 | delete *it; |
---|
| 674 | aggDecl->get_members().erase( it ); |
---|
| 675 | } // if |
---|
| 676 | it = next; |
---|
| 677 | } |
---|
| 678 | return aggDecl; |
---|
| 679 | } |
---|
| 680 | |
---|
[45161b4d] | 681 | template<typename AggDecl> |
---|
| 682 | void EliminateTypedef::addImplicitTypedef( AggDecl * aggDecl ) { |
---|
| 683 | if ( typedefNames.count( aggDecl->get_name() ) == 0 ) { |
---|
[62e5546] | 684 | Type *type = nullptr; |
---|
[45161b4d] | 685 | if ( StructDecl * newDeclStructDecl = dynamic_cast< StructDecl * >( aggDecl ) ) { |
---|
| 686 | type = new StructInstType( Type::Qualifiers(), newDeclStructDecl->get_name() ); |
---|
| 687 | } else if ( UnionDecl * newDeclUnionDecl = dynamic_cast< UnionDecl * >( aggDecl ) ) { |
---|
| 688 | type = new UnionInstType( Type::Qualifiers(), newDeclUnionDecl->get_name() ); |
---|
| 689 | } else if ( EnumDecl * newDeclEnumDecl = dynamic_cast< EnumDecl * >( aggDecl ) ) { |
---|
| 690 | type = new EnumInstType( Type::Qualifiers(), newDeclEnumDecl->get_name() ); |
---|
| 691 | } // if |
---|
[46f6134] | 692 | TypedefDeclPtr tyDecl( new TypedefDecl( aggDecl->get_name(), DeclarationNode::NoStorageClass, type ) ); |
---|
| 693 | typedefNames[ aggDecl->get_name() ] = std::make_pair( std::move( tyDecl ), scopeLevel ); |
---|
[45161b4d] | 694 | } // if |
---|
| 695 | } |
---|
[4e06c1e] | 696 | |
---|
[85c4ef0] | 697 | Declaration *EliminateTypedef::mutate( StructDecl * structDecl ) { |
---|
[45161b4d] | 698 | addImplicitTypedef( structDecl ); |
---|
[85c4ef0] | 699 | Mutator::mutate( structDecl ); |
---|
| 700 | return handleAggregate( structDecl ); |
---|
| 701 | } |
---|
| 702 | |
---|
| 703 | Declaration *EliminateTypedef::mutate( UnionDecl * unionDecl ) { |
---|
[45161b4d] | 704 | addImplicitTypedef( unionDecl ); |
---|
[85c4ef0] | 705 | Mutator::mutate( unionDecl ); |
---|
| 706 | return handleAggregate( unionDecl ); |
---|
| 707 | } |
---|
| 708 | |
---|
| 709 | Declaration *EliminateTypedef::mutate( EnumDecl * enumDecl ) { |
---|
[45161b4d] | 710 | addImplicitTypedef( enumDecl ); |
---|
[85c4ef0] | 711 | Mutator::mutate( enumDecl ); |
---|
| 712 | return handleAggregate( enumDecl ); |
---|
| 713 | } |
---|
| 714 | |
---|
[45161b4d] | 715 | Declaration *EliminateTypedef::mutate( TraitDecl * contextDecl ) { |
---|
[85c4ef0] | 716 | Mutator::mutate( contextDecl ); |
---|
| 717 | return handleAggregate( contextDecl ); |
---|
| 718 | } |
---|
| 719 | |
---|
[d1969a6] | 720 | void VerifyCtorDtorAssign::verify( std::list< Declaration * > & translationUnit ) { |
---|
| 721 | VerifyCtorDtorAssign verifier; |
---|
[9cb8e88d] | 722 | acceptAll( translationUnit, verifier ); |
---|
| 723 | } |
---|
| 724 | |
---|
[d1969a6] | 725 | void VerifyCtorDtorAssign::visit( FunctionDecl * funcDecl ) { |
---|
[9cb8e88d] | 726 | FunctionType * funcType = funcDecl->get_functionType(); |
---|
| 727 | std::list< DeclarationWithType * > &returnVals = funcType->get_returnVals(); |
---|
| 728 | std::list< DeclarationWithType * > ¶ms = funcType->get_parameters(); |
---|
| 729 | |
---|
[d1969a6] | 730 | if ( InitTweak::isCtorDtorAssign( funcDecl->get_name() ) ) { |
---|
[9cb8e88d] | 731 | if ( params.size() == 0 ) { |
---|
[d1969a6] | 732 | throw SemanticError( "Constructors, destructors, and assignment functions require at least one parameter ", funcDecl ); |
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[9cb8e88d] | 733 | } |
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| 734 | if ( ! dynamic_cast< PointerType * >( params.front()->get_type() ) ) { |
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[d1969a6] | 735 | throw SemanticError( "First parameter of a constructor, destructor, or assignment function must be a pointer ", funcDecl ); |
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[9cb8e88d] | 736 | } |
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[d1969a6] | 737 | if ( InitTweak::isCtorDtor( funcDecl->get_name() ) && returnVals.size() != 0 ) { |
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[9cb8e88d] | 738 | throw SemanticError( "Constructors and destructors cannot have explicit return values ", funcDecl ); |
---|
| 739 | } |
---|
| 740 | } |
---|
| 741 | |
---|
| 742 | Visitor::visit( funcDecl ); |
---|
| 743 | } |
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[70a06f6] | 744 | |
---|
[630a82a] | 745 | DeclarationWithType * CompoundLiteral::mutate( ObjectDecl *objectDecl ) { |
---|
| 746 | storageclass = objectDecl->get_storageClass(); |
---|
| 747 | DeclarationWithType * temp = Mutator::mutate( objectDecl ); |
---|
| 748 | storageclass = DeclarationNode::NoStorageClass; |
---|
| 749 | return temp; |
---|
| 750 | } |
---|
| 751 | |
---|
| 752 | Expression *CompoundLiteral::mutate( CompoundLiteralExpr *compLitExpr ) { |
---|
| 753 | // transform [storage_class] ... (struct S){ 3, ... }; |
---|
| 754 | // into [storage_class] struct S temp = { 3, ... }; |
---|
| 755 | static UniqueName indexName( "_compLit" ); |
---|
| 756 | |
---|
| 757 | ObjectDecl *tempvar = new ObjectDecl( indexName.newName(), storageclass, LinkageSpec::C, 0, compLitExpr->get_type(), compLitExpr->get_initializer() ); |
---|
| 758 | compLitExpr->set_type( 0 ); |
---|
| 759 | compLitExpr->set_initializer( 0 ); |
---|
| 760 | delete compLitExpr; |
---|
| 761 | DeclarationWithType * newtempvar = mutate( tempvar ); |
---|
| 762 | addDeclaration( newtempvar ); // add modified temporary to current block |
---|
| 763 | return new VariableExpr( newtempvar ); |
---|
| 764 | } |
---|
[cce9429] | 765 | |
---|
| 766 | void ReturnTypeFixer::fix( std::list< Declaration * > &translationUnit ) { |
---|
| 767 | ReturnTypeFixer fixer; |
---|
| 768 | acceptAll( translationUnit, fixer ); |
---|
| 769 | } |
---|
| 770 | |
---|
[9facf3b] | 771 | void ReturnTypeFixer::visit( FunctionDecl * functionDecl ) { |
---|
| 772 | Parent::visit( functionDecl ); |
---|
| 773 | FunctionType * ftype = functionDecl->get_functionType(); |
---|
| 774 | std::list< DeclarationWithType * > & retVals = ftype->get_returnVals(); |
---|
| 775 | assertf( retVals.size() == 0 || retVals.size() == 1, "Function %s has too many return values: %d", functionDecl->get_name().c_str(), retVals.size() ); |
---|
| 776 | if ( retVals.size() == 1 ) { |
---|
| 777 | // 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) |
---|
| 778 | // ensure other return values have a name |
---|
| 779 | DeclarationWithType * ret = retVals.front(); |
---|
| 780 | if ( ret->get_name() == "" ) { |
---|
| 781 | ret->set_name( toString( "_retval_", CodeGen::genName( functionDecl ) ) ); |
---|
| 782 | } |
---|
| 783 | } |
---|
| 784 | } |
---|
[cce9429] | 785 | |
---|
[9facf3b] | 786 | void ReturnTypeFixer::visit( FunctionType * ftype ) { |
---|
[cce9429] | 787 | // xxx - need to handle named return values - this information needs to be saved somehow |
---|
| 788 | // so that resolution has access to the names. |
---|
| 789 | // Note that this pass needs to happen early so that other passes which look for tuple types |
---|
| 790 | // find them in all of the right places, including function return types. |
---|
| 791 | std::list< DeclarationWithType * > & retVals = ftype->get_returnVals(); |
---|
| 792 | if ( retVals.size() > 1 ) { |
---|
| 793 | // generate a single return parameter which is the tuple of all of the return values |
---|
| 794 | TupleType * tupleType = safe_dynamic_cast< TupleType * >( ResolvExpr::extractResultType( ftype ) ); |
---|
| 795 | // ensure return value is not destructed by explicitly creating an empty ListInit node wherein maybeConstruct is false. |
---|
[9facf3b] | 796 | ObjectDecl * newRet = new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, tupleType, new ListInit( std::list<Initializer*>(), noDesignators, false ) ); |
---|
[cce9429] | 797 | deleteAll( retVals ); |
---|
| 798 | retVals.clear(); |
---|
| 799 | retVals.push_back( newRet ); |
---|
| 800 | } |
---|
| 801 | } |
---|
[51b7345] | 802 | } // namespace SymTab |
---|
[0dd3a2f] | 803 | |
---|
| 804 | // Local Variables: // |
---|
| 805 | // tab-width: 4 // |
---|
| 806 | // mode: c++ // |
---|
| 807 | // compile-command: "make install" // |
---|
| 808 | // End: // |
---|