[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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[b128d3e] | 11 | // Last Modified By : Peter A. Buhr |
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| 12 | // Last Modified On : Mon Aug 28 13:47:23 2017 |
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| 13 | // Update Count : 359 |
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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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[d180746] | 42 | #include <cassert> // for assertf, assert |
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[30f9072] | 43 | #include <cstddef> // for size_t |
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[d180746] | 44 | #include <list> // for list |
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| 45 | #include <string> // for string |
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| 46 | #include <utility> // for pair |
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[30f9072] | 47 | |
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| 48 | #include "CodeGen/CodeGenerator.h" // for genName |
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[9236060] | 49 | #include "CodeGen/OperatorTable.h" // for isCtorDtor, isCtorDtorAssign |
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[30f9072] | 50 | #include "Common/PassVisitor.h" // for PassVisitor, WithDeclsToAdd |
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[d180746] | 51 | #include "Common/ScopedMap.h" // for ScopedMap |
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[30f9072] | 52 | #include "Common/SemanticError.h" // for SemanticError |
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| 53 | #include "Common/UniqueName.h" // for UniqueName |
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| 54 | #include "Common/utility.h" // for operator+, cloneAll, deleteAll |
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[be9288a] | 55 | #include "Concurrency/Keywords.h" // for applyKeywords |
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[30f9072] | 56 | #include "FixFunction.h" // for FixFunction |
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| 57 | #include "Indexer.h" // for Indexer |
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[8b11840] | 58 | #include "InitTweak/GenInit.h" // for fixReturnStatements |
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[d180746] | 59 | #include "InitTweak/InitTweak.h" // for isCtorDtorAssign |
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| 60 | #include "Parser/LinkageSpec.h" // for C |
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| 61 | #include "ResolvExpr/typeops.h" // for typesCompatible |
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[be9288a] | 62 | #include "SymTab/Autogen.h" // for SizeType |
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| 63 | #include "SynTree/Attribute.h" // for noAttributes, Attribute |
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[30f9072] | 64 | #include "SynTree/Constant.h" // for Constant |
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[d180746] | 65 | #include "SynTree/Declaration.h" // for ObjectDecl, DeclarationWithType |
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| 66 | #include "SynTree/Expression.h" // for CompoundLiteralExpr, Expressio... |
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| 67 | #include "SynTree/Initializer.h" // for ListInit, Initializer |
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| 68 | #include "SynTree/Label.h" // for operator==, Label |
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| 69 | #include "SynTree/Mutator.h" // for Mutator |
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| 70 | #include "SynTree/Type.h" // for Type, TypeInstType, EnumInstType |
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| 71 | #include "SynTree/TypeSubstitution.h" // for TypeSubstitution |
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| 72 | #include "SynTree/Visitor.h" // for Visitor |
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| 73 | |
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| 74 | class CompoundStmt; |
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| 75 | class ReturnStmt; |
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| 76 | class SwitchStmt; |
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[51b7345] | 77 | |
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| 78 | |
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[c8ffe20b] | 79 | #define debugPrint( x ) if ( doDebug ) { std::cout << x; } |
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[51b7345] | 80 | |
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| 81 | namespace SymTab { |
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[a09e45b] | 82 | struct HoistStruct final : public WithDeclsToAdd, public WithGuards { |
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[82dd287] | 83 | /// Flattens nested struct types |
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[0dd3a2f] | 84 | static void hoistStruct( std::list< Declaration * > &translationUnit ); |
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[9cb8e88d] | 85 | |
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[a09e45b] | 86 | void previsit( EnumInstType * enumInstType ); |
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| 87 | void previsit( StructInstType * structInstType ); |
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| 88 | void previsit( UnionInstType * unionInstType ); |
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| 89 | void previsit( StructDecl * aggregateDecl ); |
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| 90 | void previsit( UnionDecl * aggregateDecl ); |
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[9cb8e88d] | 91 | |
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[a08ba92] | 92 | private: |
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[0dd3a2f] | 93 | template< typename AggDecl > void handleAggregate( AggDecl *aggregateDecl ); |
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[c8ffe20b] | 94 | |
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[bdad6eb7] | 95 | AggregateDecl * parentAggr = nullptr; |
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[a08ba92] | 96 | }; |
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[c8ffe20b] | 97 | |
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[cce9429] | 98 | /// Fix return types so that every function returns exactly one value |
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[d24d4e1] | 99 | struct ReturnTypeFixer { |
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[cce9429] | 100 | static void fix( std::list< Declaration * > &translationUnit ); |
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| 101 | |
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[0db6fc0] | 102 | void postvisit( FunctionDecl * functionDecl ); |
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| 103 | void postvisit( FunctionType * ftype ); |
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[cce9429] | 104 | }; |
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| 105 | |
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[de91427b] | 106 | /// Replaces enum types by int, and function or array types in function parameter and return lists by appropriate pointers. |
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[d24d4e1] | 107 | struct EnumAndPointerDecay { |
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[06edda0] | 108 | void previsit( EnumDecl *aggregateDecl ); |
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| 109 | void previsit( FunctionType *func ); |
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[a08ba92] | 110 | }; |
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[82dd287] | 111 | |
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| 112 | /// Associates forward declarations of aggregates with their definitions |
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[b95fe40] | 113 | struct LinkReferenceToTypes final : public WithIndexer, public WithGuards { |
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[522363e] | 114 | LinkReferenceToTypes( const Indexer *indexer ); |
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| 115 | void postvisit( TypeInstType *typeInst ); |
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[be9036d] | 116 | |
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[522363e] | 117 | void postvisit( EnumInstType *enumInst ); |
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| 118 | void postvisit( StructInstType *structInst ); |
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| 119 | void postvisit( UnionInstType *unionInst ); |
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| 120 | void postvisit( TraitInstType *traitInst ); |
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[be9036d] | 121 | |
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[522363e] | 122 | void postvisit( EnumDecl *enumDecl ); |
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| 123 | void postvisit( StructDecl *structDecl ); |
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| 124 | void postvisit( UnionDecl *unionDecl ); |
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| 125 | void postvisit( TraitDecl * traitDecl ); |
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[be9036d] | 126 | |
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[b95fe40] | 127 | void previsit( StructDecl *structDecl ); |
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| 128 | void previsit( UnionDecl *unionDecl ); |
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| 129 | |
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| 130 | void renameGenericParams( std::list< TypeDecl * > & params ); |
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| 131 | |
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[06edda0] | 132 | private: |
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[522363e] | 133 | const Indexer *local_indexer; |
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[9cb8e88d] | 134 | |
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[c0aa336] | 135 | typedef std::map< std::string, std::list< EnumInstType * > > ForwardEnumsType; |
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[0dd3a2f] | 136 | typedef std::map< std::string, std::list< StructInstType * > > ForwardStructsType; |
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| 137 | typedef std::map< std::string, std::list< UnionInstType * > > ForwardUnionsType; |
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[c0aa336] | 138 | ForwardEnumsType forwardEnums; |
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[0dd3a2f] | 139 | ForwardStructsType forwardStructs; |
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| 140 | ForwardUnionsType forwardUnions; |
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[b95fe40] | 141 | /// true if currently in a generic type body, so that type parameter instances can be renamed appropriately |
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| 142 | bool inGeneric = false; |
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[a08ba92] | 143 | }; |
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[c8ffe20b] | 144 | |
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[06edda0] | 145 | /// 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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[522363e] | 146 | struct ForallPointerDecay final { |
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[8b11840] | 147 | void previsit( ObjectDecl * object ); |
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| 148 | void previsit( FunctionDecl * func ); |
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[bd7e609] | 149 | void previsit( StructDecl * aggrDecl ); |
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| 150 | void previsit( UnionDecl * aggrDecl ); |
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[a08ba92] | 151 | }; |
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[c8ffe20b] | 152 | |
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[d24d4e1] | 153 | struct ReturnChecker : public WithGuards { |
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[de91427b] | 154 | /// Checks that return statements return nothing if their return type is void |
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| 155 | /// and return something if the return type is non-void. |
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| 156 | static void checkFunctionReturns( std::list< Declaration * > & translationUnit ); |
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| 157 | |
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[0db6fc0] | 158 | void previsit( FunctionDecl * functionDecl ); |
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| 159 | void previsit( ReturnStmt * returnStmt ); |
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[de91427b] | 160 | |
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[0db6fc0] | 161 | typedef std::list< DeclarationWithType * > ReturnVals; |
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| 162 | ReturnVals returnVals; |
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[de91427b] | 163 | }; |
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| 164 | |
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[a506df4] | 165 | struct EliminateTypedef final : public WithVisitorRef<EliminateTypedef>, public WithGuards { |
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[de91427b] | 166 | EliminateTypedef() : scopeLevel( 0 ) {} |
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| 167 | /// Replaces typedefs by forward declarations |
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[0dd3a2f] | 168 | static void eliminateTypedef( std::list< Declaration * > &translationUnit ); |
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[85c4ef0] | 169 | |
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[a506df4] | 170 | Type * postmutate( TypeInstType * aggregateUseType ); |
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| 171 | Declaration * postmutate( TypedefDecl * typeDecl ); |
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| 172 | void premutate( TypeDecl * typeDecl ); |
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| 173 | void premutate( FunctionDecl * funcDecl ); |
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| 174 | void premutate( ObjectDecl * objDecl ); |
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| 175 | DeclarationWithType * postmutate( ObjectDecl * objDecl ); |
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| 176 | |
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| 177 | void premutate( CastExpr * castExpr ); |
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| 178 | |
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| 179 | void premutate( CompoundStmt * compoundStmt ); |
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| 180 | CompoundStmt * postmutate( CompoundStmt * compoundStmt ); |
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| 181 | |
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| 182 | void premutate( StructDecl * structDecl ); |
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| 183 | Declaration * postmutate( StructDecl * structDecl ); |
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| 184 | void premutate( UnionDecl * unionDecl ); |
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| 185 | Declaration * postmutate( UnionDecl * unionDecl ); |
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| 186 | void premutate( EnumDecl * enumDecl ); |
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| 187 | Declaration * postmutate( EnumDecl * enumDecl ); |
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| 188 | Declaration * postmutate( TraitDecl * contextDecl ); |
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| 189 | |
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[1f370451] | 190 | void premutate( FunctionType * ftype ); |
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| 191 | |
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[a506df4] | 192 | private: |
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[85c4ef0] | 193 | template<typename AggDecl> |
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| 194 | AggDecl *handleAggregate( AggDecl * aggDecl ); |
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| 195 | |
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[45161b4d] | 196 | template<typename AggDecl> |
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| 197 | void addImplicitTypedef( AggDecl * aggDecl ); |
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[70a06f6] | 198 | |
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[8d7bef2] | 199 | typedef ScopedMap< std::string, std::pair< TypedefDecl*, 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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[1f370451] | 204 | bool inFunctionType = false; |
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[a08ba92] | 205 | }; |
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[c8ffe20b] | 206 | |
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[d24d4e1] | 207 | struct VerifyCtorDtorAssign { |
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[d1969a6] | 208 | /// ensure that constructors, destructors, and assignment have at least one |
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| 209 | /// parameter, the first of which must be a pointer, and that ctor/dtors have no |
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[9cb8e88d] | 210 | /// return values. |
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| 211 | static void verify( std::list< Declaration * > &translationUnit ); |
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| 212 | |
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[0db6fc0] | 213 | void previsit( FunctionDecl *funcDecl ); |
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[5f98ce5] | 214 | }; |
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[70a06f6] | 215 | |
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[11ab8ea8] | 216 | /// ensure that generic types have the correct number of type arguments |
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[d24d4e1] | 217 | struct ValidateGenericParameters { |
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[0db6fc0] | 218 | void previsit( StructInstType * inst ); |
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| 219 | void previsit( UnionInstType * inst ); |
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[5f98ce5] | 220 | }; |
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[70a06f6] | 221 | |
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[d24d4e1] | 222 | struct ArrayLength { |
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[fbd7ad6] | 223 | /// for array types without an explicit length, compute the length and store it so that it |
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| 224 | /// is known to the rest of the phases. For example, |
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| 225 | /// int x[] = { 1, 2, 3 }; |
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| 226 | /// int y[][2] = { { 1, 2, 3 }, { 1, 2, 3 } }; |
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| 227 | /// here x and y are known at compile-time to have length 3, so change this into |
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| 228 | /// int x[3] = { 1, 2, 3 }; |
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| 229 | /// int y[3][2] = { { 1, 2, 3 }, { 1, 2, 3 } }; |
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| 230 | static void computeLength( std::list< Declaration * > & translationUnit ); |
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| 231 | |
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[0db6fc0] | 232 | void previsit( ObjectDecl * objDecl ); |
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[fbd7ad6] | 233 | }; |
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| 234 | |
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[d24d4e1] | 235 | struct CompoundLiteral final : public WithDeclsToAdd, public WithVisitorRef<CompoundLiteral> { |
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[68fe077a] | 236 | Type::StorageClasses storageClasses; |
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[630a82a] | 237 | |
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[d24d4e1] | 238 | void premutate( ObjectDecl *objectDecl ); |
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| 239 | Expression * postmutate( CompoundLiteralExpr *compLitExpr ); |
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[9cb8e88d] | 240 | }; |
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| 241 | |
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[5809461] | 242 | struct LabelAddressFixer final : public WithGuards { |
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| 243 | std::set< Label > labels; |
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| 244 | |
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| 245 | void premutate( FunctionDecl * funcDecl ); |
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| 246 | Expression * postmutate( AddressExpr * addrExpr ); |
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| 247 | }; |
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[4fbdfae0] | 248 | |
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| 249 | FunctionDecl * dereferenceOperator = nullptr; |
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| 250 | struct FindSpecialDeclarations final { |
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| 251 | void previsit( FunctionDecl * funcDecl ); |
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| 252 | }; |
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| 253 | |
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[522363e] | 254 | void validate( std::list< Declaration * > &translationUnit, __attribute__((unused)) bool doDebug ) { |
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[06edda0] | 255 | PassVisitor<EnumAndPointerDecay> epc; |
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[522363e] | 256 | PassVisitor<LinkReferenceToTypes> lrt( nullptr ); |
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| 257 | PassVisitor<ForallPointerDecay> fpd; |
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[d24d4e1] | 258 | PassVisitor<CompoundLiteral> compoundliteral; |
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[0db6fc0] | 259 | PassVisitor<ValidateGenericParameters> genericParams; |
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[4fbdfae0] | 260 | PassVisitor<FindSpecialDeclarations> finder; |
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[5809461] | 261 | PassVisitor<LabelAddressFixer> labelAddrFixer; |
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[630a82a] | 262 | |
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[fbcde64] | 263 | EliminateTypedef::eliminateTypedef( translationUnit ); |
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[11ab8ea8] | 264 | HoistStruct::hoistStruct( translationUnit ); // must happen after EliminateTypedef, so that aggregate typedefs occur in the correct order |
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[cce9429] | 265 | ReturnTypeFixer::fix( translationUnit ); // must happen before autogen |
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[8e0147a] | 266 | acceptAll( translationUnit, epc ); // must happen before VerifyCtorDtorAssign, because void return objects should not exist; before LinkReferenceToTypes because it is an indexer and needs correct types for mangling |
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[861799c] | 267 | acceptAll( translationUnit, lrt ); // must happen before autogen, because sized flag needs to propagate to generated functions |
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[11ab8ea8] | 268 | acceptAll( translationUnit, genericParams ); // check as early as possible - can't happen before LinkReferenceToTypes |
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[ed8a0d2] | 269 | VerifyCtorDtorAssign::verify( translationUnit ); // must happen before autogen, because autogen examines existing ctor/dtors |
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[bd7e609] | 270 | ReturnChecker::checkFunctionReturns( translationUnit ); |
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| 271 | InitTweak::fixReturnStatements( translationUnit ); // must happen before autogen |
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[bcda04c] | 272 | Concurrency::applyKeywords( translationUnit ); |
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[bd7e609] | 273 | acceptAll( translationUnit, fpd ); // must happen before autogenerateRoutines, after Concurrency::applyKeywords because uniqueIds must be set on declaration before resolution |
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[06edda0] | 274 | autogenerateRoutines( translationUnit ); // moved up, used to be below compoundLiteral - currently needs EnumAndPointerDecay |
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[bcda04c] | 275 | Concurrency::implementMutexFuncs( translationUnit ); |
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| 276 | Concurrency::implementThreadStarter( translationUnit ); |
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[d24d4e1] | 277 | mutateAll( translationUnit, compoundliteral ); |
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[fbd7ad6] | 278 | ArrayLength::computeLength( translationUnit ); |
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[bd7e609] | 279 | acceptAll( translationUnit, finder ); // xxx - remove this pass soon |
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[5809461] | 280 | mutateAll( translationUnit, labelAddrFixer ); |
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[a08ba92] | 281 | } |
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[9cb8e88d] | 282 | |
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[a08ba92] | 283 | void validateType( Type *type, const Indexer *indexer ) { |
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[06edda0] | 284 | PassVisitor<EnumAndPointerDecay> epc; |
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[522363e] | 285 | PassVisitor<LinkReferenceToTypes> lrt( indexer ); |
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| 286 | PassVisitor<ForallPointerDecay> fpd; |
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[bda58ad] | 287 | type->accept( epc ); |
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[cce9429] | 288 | type->accept( lrt ); |
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[06edda0] | 289 | type->accept( fpd ); |
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[a08ba92] | 290 | } |
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[c8ffe20b] | 291 | |
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[a08ba92] | 292 | void HoistStruct::hoistStruct( std::list< Declaration * > &translationUnit ) { |
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[a09e45b] | 293 | PassVisitor<HoistStruct> hoister; |
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| 294 | acceptAll( translationUnit, hoister ); |
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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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[bdad6eb7] | 303 | if ( parentAggr ) { |
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[0dd3a2f] | 304 | // Add elements in stack order corresponding to nesting structure. |
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[a09e45b] | 305 | declsToAddBefore.push_front( aggregateDecl ); |
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[0dd3a2f] | 306 | } else { |
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[bdad6eb7] | 307 | GuardValue( parentAggr ); |
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| 308 | parentAggr = aggregateDecl; |
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[0dd3a2f] | 309 | } // if |
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| 310 | // Always remove the hoisted aggregate from the inner structure. |
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[68f9c43] | 311 | GuardAction( [aggregateDecl]() { filter( aggregateDecl->members, isStructOrUnion ); } ); |
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[a08ba92] | 312 | } |
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[c8ffe20b] | 313 | |
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[a09e45b] | 314 | void HoistStruct::previsit( EnumInstType * inst ) { |
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| 315 | if ( inst->baseEnum ) { |
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| 316 | declsToAddBefore.push_front( inst->baseEnum ); |
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[c0aa336] | 317 | } |
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| 318 | } |
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| 319 | |
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[a09e45b] | 320 | void HoistStruct::previsit( StructInstType * inst ) { |
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| 321 | if ( inst->baseStruct ) { |
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| 322 | declsToAddBefore.push_front( inst->baseStruct ); |
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[c0aa336] | 323 | } |
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| 324 | } |
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| 325 | |
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[a09e45b] | 326 | void HoistStruct::previsit( UnionInstType * inst ) { |
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| 327 | if ( inst->baseUnion ) { |
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| 328 | declsToAddBefore.push_front( inst->baseUnion ); |
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[c0aa336] | 329 | } |
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| 330 | } |
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| 331 | |
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[a09e45b] | 332 | void HoistStruct::previsit( StructDecl * aggregateDecl ) { |
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[0dd3a2f] | 333 | handleAggregate( aggregateDecl ); |
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[a08ba92] | 334 | } |
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[c8ffe20b] | 335 | |
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[a09e45b] | 336 | void HoistStruct::previsit( UnionDecl * aggregateDecl ) { |
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[0dd3a2f] | 337 | handleAggregate( aggregateDecl ); |
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[a08ba92] | 338 | } |
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[c8ffe20b] | 339 | |
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[06edda0] | 340 | void EnumAndPointerDecay::previsit( EnumDecl *enumDecl ) { |
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[0dd3a2f] | 341 | // Set the type of each member of the enumeration to be EnumConstant |
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| 342 | for ( std::list< Declaration * >::iterator i = enumDecl->get_members().begin(); i != enumDecl->get_members().end(); ++i ) { |
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[f6d7e0f] | 343 | ObjectDecl * obj = dynamic_cast< ObjectDecl * >( *i ); |
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[0dd3a2f] | 344 | assert( obj ); |
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[f2e40a9f] | 345 | obj->set_type( new EnumInstType( Type::Qualifiers( Type::Const ), enumDecl->get_name() ) ); |
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[0dd3a2f] | 346 | } // for |
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[a08ba92] | 347 | } |
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[51b7345] | 348 | |
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[a08ba92] | 349 | namespace { |
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[83de11e] | 350 | template< typename DWTList > |
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[4bda2cf] | 351 | void fixFunctionList( DWTList & dwts, bool isVarArgs, FunctionType * func ) { |
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| 352 | auto nvals = dwts.size(); |
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| 353 | bool containsVoid = false; |
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| 354 | for ( auto & dwt : dwts ) { |
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| 355 | // fix each DWT and record whether a void was found |
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| 356 | containsVoid |= fixFunction( dwt ); |
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| 357 | } |
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| 358 | |
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| 359 | // the only case in which "void" is valid is where it is the only one in the list |
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| 360 | if ( containsVoid && ( nvals > 1 || isVarArgs ) ) { |
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[a16764a6] | 361 | SemanticError( func, "invalid type void in function type " ); |
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[4bda2cf] | 362 | } |
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| 363 | |
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| 364 | // one void is the only thing in the list; remove it. |
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| 365 | if ( containsVoid ) { |
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| 366 | dwts.clear(); |
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| 367 | } |
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[0dd3a2f] | 368 | } |
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[a08ba92] | 369 | } |
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[c8ffe20b] | 370 | |
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[06edda0] | 371 | void EnumAndPointerDecay::previsit( FunctionType *func ) { |
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[0dd3a2f] | 372 | // Fix up parameters and return types |
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[4bda2cf] | 373 | fixFunctionList( func->parameters, func->isVarArgs, func ); |
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| 374 | fixFunctionList( func->returnVals, false, func ); |
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[a08ba92] | 375 | } |
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[c8ffe20b] | 376 | |
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[522363e] | 377 | LinkReferenceToTypes::LinkReferenceToTypes( const Indexer *other_indexer ) { |
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[0dd3a2f] | 378 | if ( other_indexer ) { |
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[522363e] | 379 | local_indexer = other_indexer; |
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[0dd3a2f] | 380 | } else { |
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[522363e] | 381 | local_indexer = &indexer; |
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[0dd3a2f] | 382 | } // if |
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[a08ba92] | 383 | } |
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[c8ffe20b] | 384 | |
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[522363e] | 385 | void LinkReferenceToTypes::postvisit( EnumInstType *enumInst ) { |
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| 386 | EnumDecl *st = local_indexer->lookupEnum( enumInst->get_name() ); |
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[c0aa336] | 387 | // it's not a semantic error if the enum is not found, just an implicit forward declaration |
---|
| 388 | if ( st ) { |
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| 389 | //assert( ! enumInst->get_baseEnum() || enumInst->get_baseEnum()->get_members().empty() || ! st->get_members().empty() ); |
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| 390 | enumInst->set_baseEnum( st ); |
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| 391 | } // if |
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| 392 | if ( ! st || st->get_members().empty() ) { |
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| 393 | // use of forward declaration |
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| 394 | forwardEnums[ enumInst->get_name() ].push_back( enumInst ); |
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| 395 | } // if |
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| 396 | } |
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| 397 | |
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[48fa824] | 398 | void checkGenericParameters( ReferenceToType * inst ) { |
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| 399 | for ( Expression * param : inst->parameters ) { |
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| 400 | if ( ! dynamic_cast< TypeExpr * >( param ) ) { |
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[a16764a6] | 401 | SemanticError( inst, "Expression parameters for generic types are currently unsupported: " ); |
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[48fa824] | 402 | } |
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| 403 | } |
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| 404 | } |
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| 405 | |
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[522363e] | 406 | void LinkReferenceToTypes::postvisit( StructInstType *structInst ) { |
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| 407 | StructDecl *st = local_indexer->lookupStruct( structInst->get_name() ); |
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[0dd3a2f] | 408 | // it's not a semantic error if the struct is not found, just an implicit forward declaration |
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| 409 | if ( st ) { |
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[98735ef] | 410 | //assert( ! structInst->get_baseStruct() || structInst->get_baseStruct()->get_members().empty() || ! st->get_members().empty() ); |
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[0dd3a2f] | 411 | structInst->set_baseStruct( 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 | forwardStructs[ structInst->get_name() ].push_back( structInst ); |
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| 416 | } // if |
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[48fa824] | 417 | checkGenericParameters( structInst ); |
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[a08ba92] | 418 | } |
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[c8ffe20b] | 419 | |
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[522363e] | 420 | void LinkReferenceToTypes::postvisit( UnionInstType *unionInst ) { |
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| 421 | UnionDecl *un = local_indexer->lookupUnion( unionInst->get_name() ); |
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[0dd3a2f] | 422 | // it's not a semantic error if the union is not found, just an implicit forward declaration |
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| 423 | if ( un ) { |
---|
| 424 | unionInst->set_baseUnion( un ); |
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| 425 | } // if |
---|
| 426 | if ( ! un || un->get_members().empty() ) { |
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| 427 | // use of forward declaration |
---|
| 428 | forwardUnions[ unionInst->get_name() ].push_back( unionInst ); |
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| 429 | } // if |
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[48fa824] | 430 | checkGenericParameters( unionInst ); |
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[a08ba92] | 431 | } |
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[c8ffe20b] | 432 | |
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[be9036d] | 433 | template< typename Decl > |
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| 434 | void normalizeAssertions( std::list< Decl * > & assertions ) { |
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| 435 | // ensure no duplicate trait members after the clone |
---|
| 436 | auto pred = [](Decl * d1, Decl * d2) { |
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| 437 | // only care if they're equal |
---|
| 438 | DeclarationWithType * dwt1 = dynamic_cast<DeclarationWithType *>( d1 ); |
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| 439 | DeclarationWithType * dwt2 = dynamic_cast<DeclarationWithType *>( d2 ); |
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| 440 | if ( dwt1 && dwt2 ) { |
---|
| 441 | if ( dwt1->get_name() == dwt2->get_name() && ResolvExpr::typesCompatible( dwt1->get_type(), dwt2->get_type(), SymTab::Indexer() ) ) { |
---|
| 442 | // std::cerr << "=========== equal:" << std::endl; |
---|
| 443 | // std::cerr << "d1: " << d1 << std::endl; |
---|
| 444 | // std::cerr << "d2: " << d2 << std::endl; |
---|
| 445 | return false; |
---|
| 446 | } |
---|
[2c57025] | 447 | } |
---|
[be9036d] | 448 | return d1 < d2; |
---|
| 449 | }; |
---|
| 450 | std::set<Decl *, decltype(pred)> unique_members( assertions.begin(), assertions.end(), pred ); |
---|
| 451 | // if ( unique_members.size() != assertions.size() ) { |
---|
| 452 | // std::cerr << "============different" << std::endl; |
---|
| 453 | // std::cerr << unique_members.size() << " " << assertions.size() << std::endl; |
---|
| 454 | // } |
---|
| 455 | |
---|
| 456 | std::list< Decl * > order; |
---|
| 457 | order.splice( order.end(), assertions ); |
---|
| 458 | std::copy_if( order.begin(), order.end(), back_inserter( assertions ), [&]( Decl * decl ) { |
---|
| 459 | return unique_members.count( decl ); |
---|
| 460 | }); |
---|
| 461 | } |
---|
| 462 | |
---|
| 463 | // expand assertions from trait instance, performing the appropriate type variable substitutions |
---|
| 464 | template< typename Iterator > |
---|
| 465 | void expandAssertions( TraitInstType * inst, Iterator out ) { |
---|
| 466 | assertf( inst->baseTrait, "Trait instance not linked to base trait: %s", toString( inst ).c_str() ); |
---|
| 467 | std::list< DeclarationWithType * > asserts; |
---|
| 468 | for ( Declaration * decl : inst->baseTrait->members ) { |
---|
[e3e16bc] | 469 | asserts.push_back( strict_dynamic_cast<DeclarationWithType *>( decl->clone() ) ); |
---|
[2c57025] | 470 | } |
---|
[be9036d] | 471 | // substitute trait decl parameters for instance parameters |
---|
| 472 | applySubstitution( inst->baseTrait->parameters.begin(), inst->baseTrait->parameters.end(), inst->parameters.begin(), asserts.begin(), asserts.end(), out ); |
---|
| 473 | } |
---|
| 474 | |
---|
[522363e] | 475 | void LinkReferenceToTypes::postvisit( TraitDecl * traitDecl ) { |
---|
[be9036d] | 476 | if ( traitDecl->name == "sized" ) { |
---|
| 477 | // "sized" is a special trait - flick the sized status on for the type variable |
---|
| 478 | assertf( traitDecl->parameters.size() == 1, "Built-in trait 'sized' has incorrect number of parameters: %zd", traitDecl->parameters.size() ); |
---|
| 479 | TypeDecl * td = traitDecl->parameters.front(); |
---|
| 480 | td->set_sized( true ); |
---|
| 481 | } |
---|
| 482 | |
---|
| 483 | // move assertions from type parameters into the body of the trait |
---|
| 484 | for ( TypeDecl * td : traitDecl->parameters ) { |
---|
| 485 | for ( DeclarationWithType * assert : td->assertions ) { |
---|
| 486 | if ( TraitInstType * inst = dynamic_cast< TraitInstType * >( assert->get_type() ) ) { |
---|
| 487 | expandAssertions( inst, back_inserter( traitDecl->members ) ); |
---|
| 488 | } else { |
---|
| 489 | traitDecl->members.push_back( assert->clone() ); |
---|
| 490 | } |
---|
| 491 | } |
---|
| 492 | td->assertions.clear(); |
---|
| 493 | } // for |
---|
| 494 | } |
---|
[2ae171d8] | 495 | |
---|
[522363e] | 496 | void LinkReferenceToTypes::postvisit( TraitInstType * traitInst ) { |
---|
[2ae171d8] | 497 | // handle other traits |
---|
[522363e] | 498 | TraitDecl *traitDecl = local_indexer->lookupTrait( traitInst->name ); |
---|
[4a9ccc3] | 499 | if ( ! traitDecl ) { |
---|
[a16764a6] | 500 | SemanticError( traitInst->location, "use of undeclared trait " + traitInst->name ); |
---|
[17cd4eb] | 501 | } // if |
---|
[4a9ccc3] | 502 | if ( traitDecl->get_parameters().size() != traitInst->get_parameters().size() ) { |
---|
[a16764a6] | 503 | SemanticError( traitInst, "incorrect number of trait parameters: " ); |
---|
[4a9ccc3] | 504 | } // if |
---|
[be9036d] | 505 | traitInst->baseTrait = traitDecl; |
---|
[79970ed] | 506 | |
---|
[4a9ccc3] | 507 | // need to carry over the 'sized' status of each decl in the instance |
---|
| 508 | for ( auto p : group_iterate( traitDecl->get_parameters(), traitInst->get_parameters() ) ) { |
---|
[5c4d27f] | 509 | TypeExpr * expr = dynamic_cast< TypeExpr * >( std::get<1>(p) ); |
---|
| 510 | if ( ! expr ) { |
---|
[a16764a6] | 511 | SemanticError( std::get<1>(p), "Expression parameters for trait instances are currently unsupported: " ); |
---|
[5c4d27f] | 512 | } |
---|
[4a9ccc3] | 513 | if ( TypeInstType * inst = dynamic_cast< TypeInstType * >( expr->get_type() ) ) { |
---|
| 514 | TypeDecl * formalDecl = std::get<0>(p); |
---|
| 515 | TypeDecl * instDecl = inst->get_baseType(); |
---|
| 516 | if ( formalDecl->get_sized() ) instDecl->set_sized( true ); |
---|
| 517 | } |
---|
| 518 | } |
---|
[be9036d] | 519 | // normalizeAssertions( traitInst->members ); |
---|
[a08ba92] | 520 | } |
---|
[c8ffe20b] | 521 | |
---|
[522363e] | 522 | void LinkReferenceToTypes::postvisit( EnumDecl *enumDecl ) { |
---|
[c0aa336] | 523 | // visit enum members first so that the types of self-referencing members are updated properly |
---|
| 524 | if ( ! enumDecl->get_members().empty() ) { |
---|
| 525 | ForwardEnumsType::iterator fwds = forwardEnums.find( enumDecl->get_name() ); |
---|
| 526 | if ( fwds != forwardEnums.end() ) { |
---|
| 527 | for ( std::list< EnumInstType * >::iterator inst = fwds->second.begin(); inst != fwds->second.end(); ++inst ) { |
---|
| 528 | (*inst )->set_baseEnum( enumDecl ); |
---|
| 529 | } // for |
---|
| 530 | forwardEnums.erase( fwds ); |
---|
| 531 | } // if |
---|
| 532 | } // if |
---|
| 533 | } |
---|
| 534 | |
---|
[b95fe40] | 535 | void LinkReferenceToTypes::renameGenericParams( std::list< TypeDecl * > & params ) { |
---|
| 536 | // rename generic type parameters uniquely so that they do not conflict with user-defined function forall parameters, e.g. |
---|
| 537 | // forall(otype T) |
---|
| 538 | // struct Box { |
---|
| 539 | // T x; |
---|
| 540 | // }; |
---|
| 541 | // forall(otype T) |
---|
| 542 | // void f(Box(T) b) { |
---|
| 543 | // ... |
---|
| 544 | // } |
---|
| 545 | // The T in Box and the T in f are different, so internally the naming must reflect that. |
---|
| 546 | GuardValue( inGeneric ); |
---|
| 547 | inGeneric = ! params.empty(); |
---|
| 548 | for ( TypeDecl * td : params ) { |
---|
| 549 | td->name = "__" + td->name + "_generic_"; |
---|
| 550 | } |
---|
| 551 | } |
---|
| 552 | |
---|
| 553 | void LinkReferenceToTypes::previsit( StructDecl * structDecl ) { |
---|
| 554 | renameGenericParams( structDecl->parameters ); |
---|
| 555 | } |
---|
| 556 | |
---|
| 557 | void LinkReferenceToTypes::previsit( UnionDecl * unionDecl ) { |
---|
| 558 | renameGenericParams( unionDecl->parameters ); |
---|
| 559 | } |
---|
| 560 | |
---|
[522363e] | 561 | void LinkReferenceToTypes::postvisit( StructDecl *structDecl ) { |
---|
[677c1be] | 562 | // visit struct members first so that the types of self-referencing members are updated properly |
---|
[522363e] | 563 | // xxx - need to ensure that type parameters match up between forward declarations and definition (most importantly, number of type parameters and their defaults) |
---|
[0dd3a2f] | 564 | if ( ! structDecl->get_members().empty() ) { |
---|
| 565 | ForwardStructsType::iterator fwds = forwardStructs.find( structDecl->get_name() ); |
---|
| 566 | if ( fwds != forwardStructs.end() ) { |
---|
| 567 | for ( std::list< StructInstType * >::iterator inst = fwds->second.begin(); inst != fwds->second.end(); ++inst ) { |
---|
| 568 | (*inst )->set_baseStruct( structDecl ); |
---|
| 569 | } // for |
---|
| 570 | forwardStructs.erase( fwds ); |
---|
| 571 | } // if |
---|
| 572 | } // if |
---|
[a08ba92] | 573 | } |
---|
[c8ffe20b] | 574 | |
---|
[522363e] | 575 | void LinkReferenceToTypes::postvisit( UnionDecl *unionDecl ) { |
---|
[0dd3a2f] | 576 | if ( ! unionDecl->get_members().empty() ) { |
---|
| 577 | ForwardUnionsType::iterator fwds = forwardUnions.find( unionDecl->get_name() ); |
---|
| 578 | if ( fwds != forwardUnions.end() ) { |
---|
| 579 | for ( std::list< UnionInstType * >::iterator inst = fwds->second.begin(); inst != fwds->second.end(); ++inst ) { |
---|
| 580 | (*inst )->set_baseUnion( unionDecl ); |
---|
| 581 | } // for |
---|
| 582 | forwardUnions.erase( fwds ); |
---|
| 583 | } // if |
---|
| 584 | } // if |
---|
[a08ba92] | 585 | } |
---|
[c8ffe20b] | 586 | |
---|
[522363e] | 587 | void LinkReferenceToTypes::postvisit( TypeInstType *typeInst ) { |
---|
[b95fe40] | 588 | // ensure generic parameter instances are renamed like the base type |
---|
| 589 | if ( inGeneric && typeInst->baseType ) typeInst->name = typeInst->baseType->name; |
---|
[522363e] | 590 | if ( NamedTypeDecl *namedTypeDecl = local_indexer->lookupType( typeInst->get_name() ) ) { |
---|
[0dd3a2f] | 591 | if ( TypeDecl *typeDecl = dynamic_cast< TypeDecl * >( namedTypeDecl ) ) { |
---|
| 592 | typeInst->set_isFtype( typeDecl->get_kind() == TypeDecl::Ftype ); |
---|
| 593 | } // if |
---|
| 594 | } // if |
---|
[a08ba92] | 595 | } |
---|
[c8ffe20b] | 596 | |
---|
[4a9ccc3] | 597 | /// Fix up assertions - flattens assertion lists, removing all trait instances |
---|
[8b11840] | 598 | void forallFixer( std::list< TypeDecl * > & forall, BaseSyntaxNode * node ) { |
---|
| 599 | for ( TypeDecl * type : forall ) { |
---|
[be9036d] | 600 | std::list< DeclarationWithType * > asserts; |
---|
| 601 | asserts.splice( asserts.end(), type->assertions ); |
---|
| 602 | // expand trait instances into their members |
---|
| 603 | for ( DeclarationWithType * assertion : asserts ) { |
---|
| 604 | if ( TraitInstType *traitInst = dynamic_cast< TraitInstType * >( assertion->get_type() ) ) { |
---|
| 605 | // expand trait instance into all of its members |
---|
| 606 | expandAssertions( traitInst, back_inserter( type->assertions ) ); |
---|
| 607 | } else { |
---|
| 608 | // pass other assertions through |
---|
| 609 | type->assertions.push_back( assertion ); |
---|
| 610 | } // if |
---|
| 611 | } // for |
---|
| 612 | // apply FixFunction to every assertion to check for invalid void type |
---|
| 613 | for ( DeclarationWithType *& assertion : type->assertions ) { |
---|
[4bda2cf] | 614 | bool isVoid = fixFunction( assertion ); |
---|
| 615 | if ( isVoid ) { |
---|
[a16764a6] | 616 | SemanticError( node, "invalid type void in assertion of function " ); |
---|
[be9036d] | 617 | } // if |
---|
| 618 | } // for |
---|
| 619 | // normalizeAssertions( type->assertions ); |
---|
[0dd3a2f] | 620 | } // for |
---|
[a08ba92] | 621 | } |
---|
[c8ffe20b] | 622 | |
---|
[522363e] | 623 | void ForallPointerDecay::previsit( ObjectDecl *object ) { |
---|
[8b11840] | 624 | forallFixer( object->type->forall, object ); |
---|
| 625 | if ( PointerType *pointer = dynamic_cast< PointerType * >( object->type ) ) { |
---|
| 626 | forallFixer( pointer->base->forall, object ); |
---|
[0dd3a2f] | 627 | } // if |
---|
| 628 | object->fixUniqueId(); |
---|
[a08ba92] | 629 | } |
---|
[c8ffe20b] | 630 | |
---|
[522363e] | 631 | void ForallPointerDecay::previsit( FunctionDecl *func ) { |
---|
[8b11840] | 632 | forallFixer( func->type->forall, func ); |
---|
[0dd3a2f] | 633 | func->fixUniqueId(); |
---|
[a08ba92] | 634 | } |
---|
[c8ffe20b] | 635 | |
---|
[bd7e609] | 636 | void ForallPointerDecay::previsit( StructDecl * aggrDecl ) { |
---|
| 637 | forallFixer( aggrDecl->parameters, aggrDecl ); |
---|
| 638 | } |
---|
| 639 | |
---|
| 640 | void ForallPointerDecay::previsit( UnionDecl * aggrDecl ) { |
---|
| 641 | forallFixer( aggrDecl->parameters, aggrDecl ); |
---|
| 642 | } |
---|
| 643 | |
---|
[de91427b] | 644 | void ReturnChecker::checkFunctionReturns( std::list< Declaration * > & translationUnit ) { |
---|
[0db6fc0] | 645 | PassVisitor<ReturnChecker> checker; |
---|
[de91427b] | 646 | acceptAll( translationUnit, checker ); |
---|
| 647 | } |
---|
| 648 | |
---|
[0db6fc0] | 649 | void ReturnChecker::previsit( FunctionDecl * functionDecl ) { |
---|
[0508ab3] | 650 | GuardValue( returnVals ); |
---|
[de91427b] | 651 | returnVals = functionDecl->get_functionType()->get_returnVals(); |
---|
| 652 | } |
---|
| 653 | |
---|
[0db6fc0] | 654 | void ReturnChecker::previsit( ReturnStmt * returnStmt ) { |
---|
[74d1804] | 655 | // Previously this also checked for the existence of an expr paired with no return values on |
---|
| 656 | // the function return type. This is incorrect, since you can have an expression attached to |
---|
| 657 | // a return statement in a void-returning function in C. The expression is treated as if it |
---|
| 658 | // were cast to void. |
---|
[30f9072] | 659 | if ( ! returnStmt->get_expr() && returnVals.size() != 0 ) { |
---|
[a16764a6] | 660 | SemanticError( returnStmt, "Non-void function returns no values: " ); |
---|
[de91427b] | 661 | } |
---|
| 662 | } |
---|
| 663 | |
---|
| 664 | |
---|
[a08ba92] | 665 | bool isTypedef( Declaration *decl ) { |
---|
[0dd3a2f] | 666 | return dynamic_cast< TypedefDecl * >( decl ); |
---|
[a08ba92] | 667 | } |
---|
[c8ffe20b] | 668 | |
---|
[a08ba92] | 669 | void EliminateTypedef::eliminateTypedef( std::list< Declaration * > &translationUnit ) { |
---|
[a506df4] | 670 | PassVisitor<EliminateTypedef> eliminator; |
---|
[0dd3a2f] | 671 | mutateAll( translationUnit, eliminator ); |
---|
[a506df4] | 672 | if ( eliminator.pass.typedefNames.count( "size_t" ) ) { |
---|
[5f98ce5] | 673 | // grab and remember declaration of size_t |
---|
[a506df4] | 674 | SizeType = eliminator.pass.typedefNames["size_t"].first->get_base()->clone(); |
---|
[5f98ce5] | 675 | } else { |
---|
[40e636a] | 676 | // xxx - missing global typedef for size_t - default to long unsigned int, even though that may be wrong |
---|
| 677 | // eventually should have a warning for this case. |
---|
| 678 | SizeType = new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt ); |
---|
[5f98ce5] | 679 | } |
---|
[68f9c43] | 680 | filter( translationUnit, isTypedef ); |
---|
[a08ba92] | 681 | } |
---|
[c8ffe20b] | 682 | |
---|
[a506df4] | 683 | Type * EliminateTypedef::postmutate( TypeInstType * typeInst ) { |
---|
[9cb8e88d] | 684 | // instances of typedef types will come here. If it is an instance |
---|
[cc79d97] | 685 | // of a typdef type, link the instance to its actual type. |
---|
| 686 | TypedefMap::const_iterator def = typedefNames.find( typeInst->get_name() ); |
---|
[0dd3a2f] | 687 | if ( def != typedefNames.end() ) { |
---|
[f53836b] | 688 | Type *ret = def->second.first->base->clone(); |
---|
[6f95000] | 689 | ret->get_qualifiers() |= typeInst->get_qualifiers(); |
---|
[1f370451] | 690 | // attributes are not carried over from typedef to function parameters/return values |
---|
| 691 | if ( ! inFunctionType ) { |
---|
| 692 | ret->attributes.splice( ret->attributes.end(), typeInst->attributes ); |
---|
| 693 | } else { |
---|
| 694 | ret->attributes.clear(); |
---|
| 695 | } |
---|
[0215a76f] | 696 | // place instance parameters on the typedef'd type |
---|
[f53836b] | 697 | if ( ! typeInst->parameters.empty() ) { |
---|
[0215a76f] | 698 | ReferenceToType *rtt = dynamic_cast<ReferenceToType*>(ret); |
---|
| 699 | if ( ! rtt ) { |
---|
[a16764a6] | 700 | SemanticError( typeInst->location, "Cannot apply type parameters to base type of " + typeInst->name ); |
---|
[0215a76f] | 701 | } |
---|
| 702 | rtt->get_parameters().clear(); |
---|
[f53836b] | 703 | cloneAll( typeInst->parameters, rtt->parameters ); |
---|
| 704 | mutateAll( rtt->parameters, *visitor ); // recursively fix typedefs on parameters |
---|
[1db21619] | 705 | } // if |
---|
[0dd3a2f] | 706 | return ret; |
---|
[679864e1] | 707 | } else { |
---|
| 708 | TypeDeclMap::const_iterator base = typedeclNames.find( typeInst->get_name() ); |
---|
[f53836b] | 709 | assertf( base != typedeclNames.end(), "Cannot find typedecl name %s", typeInst->name.c_str() ); |
---|
[1e8b02f5] | 710 | typeInst->set_baseType( base->second ); |
---|
[0dd3a2f] | 711 | } // if |
---|
| 712 | return typeInst; |
---|
[a08ba92] | 713 | } |
---|
[c8ffe20b] | 714 | |
---|
[f53836b] | 715 | struct VarLenChecker : WithShortCircuiting { |
---|
| 716 | void previsit( FunctionType * ) { visit_children = false; } |
---|
| 717 | void previsit( ArrayType * at ) { |
---|
| 718 | isVarLen |= at->isVarLen; |
---|
| 719 | } |
---|
| 720 | bool isVarLen = false; |
---|
| 721 | }; |
---|
| 722 | |
---|
| 723 | bool isVariableLength( Type * t ) { |
---|
| 724 | PassVisitor<VarLenChecker> varLenChecker; |
---|
| 725 | maybeAccept( t, varLenChecker ); |
---|
| 726 | return varLenChecker.pass.isVarLen; |
---|
| 727 | } |
---|
| 728 | |
---|
[a506df4] | 729 | Declaration *EliminateTypedef::postmutate( TypedefDecl * tyDecl ) { |
---|
[cc79d97] | 730 | if ( typedefNames.count( tyDecl->get_name() ) == 1 && typedefNames[ tyDecl->get_name() ].second == scopeLevel ) { |
---|
[9cb8e88d] | 731 | // typedef to the same name from the same scope |
---|
[cc79d97] | 732 | // must be from the same type |
---|
| 733 | |
---|
| 734 | Type * t1 = tyDecl->get_base(); |
---|
| 735 | Type * t2 = typedefNames[ tyDecl->get_name() ].first->get_base(); |
---|
[1cbca6e] | 736 | if ( ! ResolvExpr::typesCompatible( t1, t2, Indexer() ) ) { |
---|
[a16764a6] | 737 | SemanticError( tyDecl->location, "Cannot redefine typedef: " + tyDecl->name ); |
---|
[f53836b] | 738 | } |
---|
[4b97770] | 739 | // Cannot redefine VLA typedefs. Note: this is slightly incorrect, because our notion of VLAs |
---|
| 740 | // at this point in the translator is imprecise. In particular, this will disallow redefining typedefs |
---|
| 741 | // with arrays whose dimension is an enumerator or a cast of a constant/enumerator. The effort required |
---|
| 742 | // to fix this corner case likely outweighs the utility of allowing it. |
---|
[f53836b] | 743 | if ( isVariableLength( t1 ) || isVariableLength( t2 ) ) { |
---|
[a16764a6] | 744 | SemanticError( tyDecl->location, "Cannot redefine typedef: " + tyDecl->name ); |
---|
[85c4ef0] | 745 | } |
---|
[cc79d97] | 746 | } else { |
---|
[8d7bef2] | 747 | typedefNames[ tyDecl->get_name() ] = std::make_pair( tyDecl, scopeLevel ); |
---|
[cc79d97] | 748 | } // if |
---|
| 749 | |
---|
[0dd3a2f] | 750 | // When a typedef is a forward declaration: |
---|
| 751 | // typedef struct screen SCREEN; |
---|
| 752 | // the declaration portion must be retained: |
---|
| 753 | // struct screen; |
---|
| 754 | // because the expansion of the typedef is: |
---|
| 755 | // void rtn( SCREEN *p ) => void rtn( struct screen *p ) |
---|
| 756 | // hence the type-name "screen" must be defined. |
---|
| 757 | // Note, qualifiers on the typedef are superfluous for the forward declaration. |
---|
[6f95000] | 758 | |
---|
| 759 | Type *designatorType = tyDecl->get_base()->stripDeclarator(); |
---|
| 760 | if ( StructInstType *aggDecl = dynamic_cast< StructInstType * >( designatorType ) ) { |
---|
[cbce272] | 761 | return new StructDecl( aggDecl->get_name(), DeclarationNode::Struct, noAttributes, tyDecl->get_linkage() ); |
---|
[6f95000] | 762 | } else if ( UnionInstType *aggDecl = dynamic_cast< UnionInstType * >( designatorType ) ) { |
---|
[cbce272] | 763 | return new UnionDecl( aggDecl->get_name(), noAttributes, tyDecl->get_linkage() ); |
---|
[6f95000] | 764 | } else if ( EnumInstType *enumDecl = dynamic_cast< EnumInstType * >( designatorType ) ) { |
---|
[cbce272] | 765 | return new EnumDecl( enumDecl->get_name(), noAttributes, tyDecl->get_linkage() ); |
---|
[0dd3a2f] | 766 | } else { |
---|
[a506df4] | 767 | return tyDecl->clone(); |
---|
[0dd3a2f] | 768 | } // if |
---|
[a08ba92] | 769 | } |
---|
[c8ffe20b] | 770 | |
---|
[a506df4] | 771 | void EliminateTypedef::premutate( TypeDecl * typeDecl ) { |
---|
[cc79d97] | 772 | TypedefMap::iterator i = typedefNames.find( typeDecl->get_name() ); |
---|
[0dd3a2f] | 773 | if ( i != typedefNames.end() ) { |
---|
| 774 | typedefNames.erase( i ) ; |
---|
| 775 | } // if |
---|
[679864e1] | 776 | |
---|
| 777 | typedeclNames[ typeDecl->get_name() ] = typeDecl; |
---|
[a08ba92] | 778 | } |
---|
[c8ffe20b] | 779 | |
---|
[a506df4] | 780 | void EliminateTypedef::premutate( FunctionDecl * ) { |
---|
| 781 | GuardScope( typedefNames ); |
---|
[a08ba92] | 782 | } |
---|
[c8ffe20b] | 783 | |
---|
[a506df4] | 784 | void EliminateTypedef::premutate( ObjectDecl * ) { |
---|
| 785 | GuardScope( typedefNames ); |
---|
| 786 | } |
---|
[dd020c0] | 787 | |
---|
[a506df4] | 788 | DeclarationWithType *EliminateTypedef::postmutate( ObjectDecl * objDecl ) { |
---|
| 789 | if ( FunctionType *funtype = dynamic_cast<FunctionType *>( objDecl->get_type() ) ) { // function type? |
---|
[02e5ab6] | 790 | // replace the current object declaration with a function declaration |
---|
[68f9c43] | 791 | return new FunctionDecl{ |
---|
| 792 | objDecl->get_name(), objDecl->get_storageClasses(), objDecl->get_linkage(), |
---|
| 793 | funtype, 0, objDecl->get_attributes(), objDecl->get_funcSpec() }; |
---|
[1db21619] | 794 | } // if |
---|
[a506df4] | 795 | return objDecl; |
---|
[a08ba92] | 796 | } |
---|
[c8ffe20b] | 797 | |
---|
[a506df4] | 798 | void EliminateTypedef::premutate( CastExpr * ) { |
---|
| 799 | GuardScope( typedefNames ); |
---|
[a08ba92] | 800 | } |
---|
[c8ffe20b] | 801 | |
---|
[a506df4] | 802 | void EliminateTypedef::premutate( CompoundStmt * ) { |
---|
| 803 | GuardScope( typedefNames ); |
---|
[cc79d97] | 804 | scopeLevel += 1; |
---|
[a506df4] | 805 | GuardAction( [this](){ scopeLevel -= 1; } ); |
---|
| 806 | } |
---|
| 807 | |
---|
| 808 | CompoundStmt *EliminateTypedef::postmutate( CompoundStmt * compoundStmt ) { |
---|
[2bf9c37] | 809 | // remove and delete decl stmts |
---|
| 810 | filter( compoundStmt->kids, [](Statement * stmt) { |
---|
| 811 | if ( DeclStmt *declStmt = dynamic_cast< DeclStmt * >( stmt ) ) { |
---|
[0dd3a2f] | 812 | if ( dynamic_cast< TypedefDecl * >( declStmt->get_decl() ) ) { |
---|
[2bf9c37] | 813 | return true; |
---|
[0dd3a2f] | 814 | } // if |
---|
| 815 | } // if |
---|
[2bf9c37] | 816 | return false; |
---|
[68f9c43] | 817 | } ); |
---|
[a506df4] | 818 | return compoundStmt; |
---|
[a08ba92] | 819 | } |
---|
[85c4ef0] | 820 | |
---|
[43c89a7] | 821 | // there may be typedefs nested within aggregates. in order for everything to work properly, these should be removed |
---|
[45161b4d] | 822 | // as well |
---|
[85c4ef0] | 823 | template<typename AggDecl> |
---|
| 824 | AggDecl *EliminateTypedef::handleAggregate( AggDecl * aggDecl ) { |
---|
[68f9c43] | 825 | filter( aggDecl->members, isTypedef ); |
---|
[85c4ef0] | 826 | return aggDecl; |
---|
| 827 | } |
---|
| 828 | |
---|
[45161b4d] | 829 | template<typename AggDecl> |
---|
| 830 | void EliminateTypedef::addImplicitTypedef( AggDecl * aggDecl ) { |
---|
| 831 | if ( typedefNames.count( aggDecl->get_name() ) == 0 ) { |
---|
[62e5546] | 832 | Type *type = nullptr; |
---|
[45161b4d] | 833 | if ( StructDecl * newDeclStructDecl = dynamic_cast< StructDecl * >( aggDecl ) ) { |
---|
| 834 | type = new StructInstType( Type::Qualifiers(), newDeclStructDecl->get_name() ); |
---|
| 835 | } else if ( UnionDecl * newDeclUnionDecl = dynamic_cast< UnionDecl * >( aggDecl ) ) { |
---|
| 836 | type = new UnionInstType( Type::Qualifiers(), newDeclUnionDecl->get_name() ); |
---|
| 837 | } else if ( EnumDecl * newDeclEnumDecl = dynamic_cast< EnumDecl * >( aggDecl ) ) { |
---|
| 838 | type = new EnumInstType( Type::Qualifiers(), newDeclEnumDecl->get_name() ); |
---|
| 839 | } // if |
---|
[8d7bef2] | 840 | TypedefDecl* tyDecl = new TypedefDecl{ aggDecl->get_name(), aggDecl->location, Type::StorageClasses(), type, aggDecl->get_linkage() }; |
---|
| 841 | typedefNames[ aggDecl->get_name() ] = std::make_pair( tyDecl, scopeLevel ); |
---|
[45161b4d] | 842 | } // if |
---|
| 843 | } |
---|
[4e06c1e] | 844 | |
---|
[a506df4] | 845 | void EliminateTypedef::premutate( StructDecl * structDecl ) { |
---|
[45161b4d] | 846 | addImplicitTypedef( structDecl ); |
---|
[a506df4] | 847 | } |
---|
| 848 | |
---|
| 849 | |
---|
| 850 | Declaration *EliminateTypedef::postmutate( StructDecl * structDecl ) { |
---|
[85c4ef0] | 851 | return handleAggregate( structDecl ); |
---|
| 852 | } |
---|
| 853 | |
---|
[a506df4] | 854 | void EliminateTypedef::premutate( UnionDecl * unionDecl ) { |
---|
[45161b4d] | 855 | addImplicitTypedef( unionDecl ); |
---|
[a506df4] | 856 | } |
---|
| 857 | |
---|
| 858 | Declaration *EliminateTypedef::postmutate( UnionDecl * unionDecl ) { |
---|
[85c4ef0] | 859 | return handleAggregate( unionDecl ); |
---|
| 860 | } |
---|
| 861 | |
---|
[a506df4] | 862 | void EliminateTypedef::premutate( EnumDecl * enumDecl ) { |
---|
[45161b4d] | 863 | addImplicitTypedef( enumDecl ); |
---|
[a506df4] | 864 | } |
---|
| 865 | |
---|
| 866 | Declaration *EliminateTypedef::postmutate( EnumDecl * enumDecl ) { |
---|
[85c4ef0] | 867 | return handleAggregate( enumDecl ); |
---|
| 868 | } |
---|
| 869 | |
---|
[a506df4] | 870 | Declaration *EliminateTypedef::postmutate( TraitDecl * traitDecl ) { |
---|
| 871 | return handleAggregate( traitDecl ); |
---|
[85c4ef0] | 872 | } |
---|
| 873 | |
---|
[1f370451] | 874 | void EliminateTypedef::premutate( FunctionType * ) { |
---|
| 875 | GuardValue( inFunctionType ); |
---|
| 876 | inFunctionType = true; |
---|
| 877 | } |
---|
| 878 | |
---|
[d1969a6] | 879 | void VerifyCtorDtorAssign::verify( std::list< Declaration * > & translationUnit ) { |
---|
[0db6fc0] | 880 | PassVisitor<VerifyCtorDtorAssign> verifier; |
---|
[9cb8e88d] | 881 | acceptAll( translationUnit, verifier ); |
---|
| 882 | } |
---|
| 883 | |
---|
[0db6fc0] | 884 | void VerifyCtorDtorAssign::previsit( FunctionDecl * funcDecl ) { |
---|
[9cb8e88d] | 885 | FunctionType * funcType = funcDecl->get_functionType(); |
---|
| 886 | std::list< DeclarationWithType * > &returnVals = funcType->get_returnVals(); |
---|
| 887 | std::list< DeclarationWithType * > ¶ms = funcType->get_parameters(); |
---|
| 888 | |
---|
[bff227f] | 889 | if ( CodeGen::isCtorDtorAssign( funcDecl->get_name() ) ) { // TODO: also check /=, etc. |
---|
[9cb8e88d] | 890 | if ( params.size() == 0 ) { |
---|
[a16764a6] | 891 | SemanticError( funcDecl, "Constructors, destructors, and assignment functions require at least one parameter " ); |
---|
[9cb8e88d] | 892 | } |
---|
[ce8c12f] | 893 | ReferenceType * refType = dynamic_cast< ReferenceType * >( params.front()->get_type() ); |
---|
[084fecc] | 894 | if ( ! refType ) { |
---|
[a16764a6] | 895 | SemanticError( funcDecl, "First parameter of a constructor, destructor, or assignment function must be a reference " ); |
---|
[9cb8e88d] | 896 | } |
---|
[bff227f] | 897 | if ( CodeGen::isCtorDtor( funcDecl->get_name() ) && returnVals.size() != 0 ) { |
---|
[a16764a6] | 898 | SemanticError( funcDecl, "Constructors and destructors cannot have explicit return values " ); |
---|
[9cb8e88d] | 899 | } |
---|
| 900 | } |
---|
| 901 | } |
---|
[70a06f6] | 902 | |
---|
[11ab8ea8] | 903 | template< typename Aggr > |
---|
| 904 | void validateGeneric( Aggr * inst ) { |
---|
| 905 | std::list< TypeDecl * > * params = inst->get_baseParameters(); |
---|
[30f9072] | 906 | if ( params ) { |
---|
[11ab8ea8] | 907 | std::list< Expression * > & args = inst->get_parameters(); |
---|
[67cf18c] | 908 | |
---|
| 909 | // insert defaults arguments when a type argument is missing (currently only supports missing arguments at the end of the list). |
---|
| 910 | // A substitution is used to ensure that defaults are replaced correctly, e.g., |
---|
| 911 | // forall(otype T, otype alloc = heap_allocator(T)) struct vector; |
---|
| 912 | // vector(int) v; |
---|
| 913 | // after insertion of default values becomes |
---|
| 914 | // vector(int, heap_allocator(T)) |
---|
| 915 | // and the substitution is built with T=int so that after substitution, the result is |
---|
| 916 | // vector(int, heap_allocator(int)) |
---|
| 917 | TypeSubstitution sub; |
---|
| 918 | auto paramIter = params->begin(); |
---|
| 919 | for ( size_t i = 0; paramIter != params->end(); ++paramIter, ++i ) { |
---|
| 920 | if ( i < args.size() ) { |
---|
[e3e16bc] | 921 | TypeExpr * expr = strict_dynamic_cast< TypeExpr * >( *std::next( args.begin(), i ) ); |
---|
[67cf18c] | 922 | sub.add( (*paramIter)->get_name(), expr->get_type()->clone() ); |
---|
| 923 | } else if ( i == args.size() ) { |
---|
| 924 | Type * defaultType = (*paramIter)->get_init(); |
---|
| 925 | if ( defaultType ) { |
---|
| 926 | args.push_back( new TypeExpr( defaultType->clone() ) ); |
---|
| 927 | sub.add( (*paramIter)->get_name(), defaultType->clone() ); |
---|
| 928 | } |
---|
| 929 | } |
---|
| 930 | } |
---|
| 931 | |
---|
| 932 | sub.apply( inst ); |
---|
[a16764a6] | 933 | if ( args.size() < params->size() ) SemanticError( inst, "Too few type arguments in generic type " ); |
---|
| 934 | if ( args.size() > params->size() ) SemanticError( inst, "Too many type arguments in generic type " ); |
---|
[11ab8ea8] | 935 | } |
---|
| 936 | } |
---|
| 937 | |
---|
[0db6fc0] | 938 | void ValidateGenericParameters::previsit( StructInstType * inst ) { |
---|
[11ab8ea8] | 939 | validateGeneric( inst ); |
---|
| 940 | } |
---|
[9cb8e88d] | 941 | |
---|
[0db6fc0] | 942 | void ValidateGenericParameters::previsit( UnionInstType * inst ) { |
---|
[11ab8ea8] | 943 | validateGeneric( inst ); |
---|
[9cb8e88d] | 944 | } |
---|
[70a06f6] | 945 | |
---|
[d24d4e1] | 946 | void CompoundLiteral::premutate( ObjectDecl *objectDecl ) { |
---|
[a7c90d4] | 947 | storageClasses = objectDecl->get_storageClasses(); |
---|
[630a82a] | 948 | } |
---|
| 949 | |
---|
[d24d4e1] | 950 | Expression *CompoundLiteral::postmutate( CompoundLiteralExpr *compLitExpr ) { |
---|
[630a82a] | 951 | // transform [storage_class] ... (struct S){ 3, ... }; |
---|
| 952 | // into [storage_class] struct S temp = { 3, ... }; |
---|
| 953 | static UniqueName indexName( "_compLit" ); |
---|
| 954 | |
---|
[68f9c43] | 955 | ObjectDecl * tempvar = new ObjectDecl{ |
---|
| 956 | indexName.newName(), storageClasses, LinkageSpec::C, nullptr, compLitExpr->get_result(), compLitExpr->get_initializer() }; |
---|
[d24d4e1] | 957 | declsToAddBefore.push_back( tempvar ); // add modified temporary to current block |
---|
| 958 | return new VariableExpr( tempvar ); |
---|
[630a82a] | 959 | } |
---|
[cce9429] | 960 | |
---|
| 961 | void ReturnTypeFixer::fix( std::list< Declaration * > &translationUnit ) { |
---|
[0db6fc0] | 962 | PassVisitor<ReturnTypeFixer> fixer; |
---|
[cce9429] | 963 | acceptAll( translationUnit, fixer ); |
---|
| 964 | } |
---|
| 965 | |
---|
[0db6fc0] | 966 | void ReturnTypeFixer::postvisit( FunctionDecl * functionDecl ) { |
---|
[9facf3b] | 967 | FunctionType * ftype = functionDecl->get_functionType(); |
---|
| 968 | std::list< DeclarationWithType * > & retVals = ftype->get_returnVals(); |
---|
[56e49b0] | 969 | assertf( retVals.size() == 0 || retVals.size() == 1, "Function %s has too many return values: %zu", functionDecl->get_name().c_str(), retVals.size() ); |
---|
[9facf3b] | 970 | if ( retVals.size() == 1 ) { |
---|
[861799c] | 971 | // 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). |
---|
| 972 | // ensure other return values have a name. |
---|
[9facf3b] | 973 | DeclarationWithType * ret = retVals.front(); |
---|
| 974 | if ( ret->get_name() == "" ) { |
---|
| 975 | ret->set_name( toString( "_retval_", CodeGen::genName( functionDecl ) ) ); |
---|
| 976 | } |
---|
[c6d2e93] | 977 | ret->get_attributes().push_back( new Attribute( "unused" ) ); |
---|
[9facf3b] | 978 | } |
---|
| 979 | } |
---|
[cce9429] | 980 | |
---|
[0db6fc0] | 981 | void ReturnTypeFixer::postvisit( FunctionType * ftype ) { |
---|
[cce9429] | 982 | // xxx - need to handle named return values - this information needs to be saved somehow |
---|
| 983 | // so that resolution has access to the names. |
---|
| 984 | // Note that this pass needs to happen early so that other passes which look for tuple types |
---|
| 985 | // find them in all of the right places, including function return types. |
---|
| 986 | std::list< DeclarationWithType * > & retVals = ftype->get_returnVals(); |
---|
| 987 | if ( retVals.size() > 1 ) { |
---|
| 988 | // generate a single return parameter which is the tuple of all of the return values |
---|
[e3e16bc] | 989 | TupleType * tupleType = strict_dynamic_cast< TupleType * >( ResolvExpr::extractResultType( ftype ) ); |
---|
[cce9429] | 990 | // ensure return value is not destructed by explicitly creating an empty ListInit node wherein maybeConstruct is false. |
---|
[68fe077a] | 991 | ObjectDecl * newRet = new ObjectDecl( "", Type::StorageClasses(), LinkageSpec::Cforall, 0, tupleType, new ListInit( std::list<Initializer*>(), noDesignators, false ) ); |
---|
[cce9429] | 992 | retVals.clear(); |
---|
| 993 | retVals.push_back( newRet ); |
---|
| 994 | } |
---|
| 995 | } |
---|
[fbd7ad6] | 996 | |
---|
| 997 | void ArrayLength::computeLength( std::list< Declaration * > & translationUnit ) { |
---|
[0db6fc0] | 998 | PassVisitor<ArrayLength> len; |
---|
[fbd7ad6] | 999 | acceptAll( translationUnit, len ); |
---|
| 1000 | } |
---|
| 1001 | |
---|
[0db6fc0] | 1002 | void ArrayLength::previsit( ObjectDecl * objDecl ) { |
---|
[fbd7ad6] | 1003 | if ( ArrayType * at = dynamic_cast< ArrayType * >( objDecl->get_type() ) ) { |
---|
[30f9072] | 1004 | if ( at->get_dimension() ) return; |
---|
[fbd7ad6] | 1005 | if ( ListInit * init = dynamic_cast< ListInit * >( objDecl->get_init() ) ) { |
---|
| 1006 | at->set_dimension( new ConstantExpr( Constant::from_ulong( init->get_initializers().size() ) ) ); |
---|
| 1007 | } |
---|
| 1008 | } |
---|
| 1009 | } |
---|
[4fbdfae0] | 1010 | |
---|
[5809461] | 1011 | struct LabelFinder { |
---|
| 1012 | std::set< Label > & labels; |
---|
| 1013 | LabelFinder( std::set< Label > & labels ) : labels( labels ) {} |
---|
| 1014 | void previsit( Statement * stmt ) { |
---|
| 1015 | for ( Label & l : stmt->labels ) { |
---|
| 1016 | labels.insert( l ); |
---|
| 1017 | } |
---|
| 1018 | } |
---|
| 1019 | }; |
---|
| 1020 | |
---|
| 1021 | void LabelAddressFixer::premutate( FunctionDecl * funcDecl ) { |
---|
| 1022 | GuardValue( labels ); |
---|
| 1023 | PassVisitor<LabelFinder> finder( labels ); |
---|
| 1024 | funcDecl->accept( finder ); |
---|
| 1025 | } |
---|
| 1026 | |
---|
| 1027 | Expression * LabelAddressFixer::postmutate( AddressExpr * addrExpr ) { |
---|
| 1028 | // convert &&label into label address |
---|
| 1029 | if ( AddressExpr * inner = dynamic_cast< AddressExpr * >( addrExpr->arg ) ) { |
---|
| 1030 | if ( NameExpr * nameExpr = dynamic_cast< NameExpr * >( inner->arg ) ) { |
---|
| 1031 | if ( labels.count( nameExpr->name ) ) { |
---|
[68f9c43] | 1032 | return new LabelAddressExpr{ nameExpr->name }; |
---|
[5809461] | 1033 | } |
---|
| 1034 | } |
---|
| 1035 | } |
---|
| 1036 | return addrExpr; |
---|
| 1037 | } |
---|
| 1038 | |
---|
[4fbdfae0] | 1039 | void FindSpecialDeclarations::previsit( FunctionDecl * funcDecl ) { |
---|
| 1040 | if ( ! dereferenceOperator ) { |
---|
| 1041 | if ( funcDecl->get_name() == "*?" && funcDecl->get_linkage() == LinkageSpec::Intrinsic ) { |
---|
| 1042 | FunctionType * ftype = funcDecl->get_functionType(); |
---|
| 1043 | if ( ftype->get_parameters().size() == 1 && ftype->get_parameters().front()->get_type()->get_qualifiers() == Type::Qualifiers() ) { |
---|
| 1044 | dereferenceOperator = funcDecl; |
---|
| 1045 | } |
---|
| 1046 | } |
---|
| 1047 | } |
---|
| 1048 | } |
---|
[51b7345] | 1049 | } // namespace SymTab |
---|
[0dd3a2f] | 1050 | |
---|
| 1051 | // Local Variables: // |
---|
| 1052 | // tab-width: 4 // |
---|
| 1053 | // mode: c++ // |
---|
| 1054 | // compile-command: "make install" // |
---|
| 1055 | // End: // |
---|