[a32b204] | 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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[71f4e4f] | 7 | // Resolver.cc -- |
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[a32b204] | 8 | // |
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| 9 | // Author : Richard C. Bilson |
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| 10 | // Created On : Sun May 17 12:17:01 2015 |
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[93401f8] | 11 | // Last Modified By : Peter A. Buhr |
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| 12 | // Last Modified On : Sat Feb 17 11:19:40 2018 |
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| 13 | // Update Count : 213 |
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[a32b204] | 14 | // |
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| 15 | |
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[ea6332d] | 16 | #include <stddef.h> // for NULL |
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[e3e16bc] | 17 | #include <cassert> // for strict_dynamic_cast, assert |
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[ea6332d] | 18 | #include <memory> // for allocator, allocator_traits<... |
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| 19 | #include <tuple> // for get |
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[bd4f2e9] | 20 | #include <vector> |
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[ea6332d] | 21 | |
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| 22 | #include "Alternative.h" // for Alternative, AltList |
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| 23 | #include "AlternativeFinder.h" // for AlternativeFinder, resolveIn... |
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[a4ca48c] | 24 | #include "Common/PassVisitor.h" // for PassVisitor |
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[ea6332d] | 25 | #include "Common/SemanticError.h" // for SemanticError |
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| 26 | #include "Common/utility.h" // for ValueGuard, group_iterate |
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| 27 | #include "CurrentObject.h" // for CurrentObject |
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[0a60c04] | 28 | #include "InitTweak/GenInit.h" |
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[ea6332d] | 29 | #include "InitTweak/InitTweak.h" // for isIntrinsicSingleArgCallStmt |
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| 30 | #include "RenameVars.h" // for RenameVars, global_renamer |
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| 31 | #include "ResolvExpr/TypeEnvironment.h" // for TypeEnvironment |
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| 32 | #include "ResolveTypeof.h" // for resolveTypeof |
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[e4d829b] | 33 | #include "Resolver.h" |
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[ea6332d] | 34 | #include "SymTab/Autogen.h" // for SizeType |
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| 35 | #include "SymTab/Indexer.h" // for Indexer |
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| 36 | #include "SynTree/Declaration.h" // for ObjectDecl, TypeDecl, Declar... |
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| 37 | #include "SynTree/Expression.h" // for Expression, CastExpr, InitExpr |
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| 38 | #include "SynTree/Initializer.h" // for ConstructorInit, SingleInit |
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| 39 | #include "SynTree/Statement.h" // for ForStmt, Statement, BranchStmt |
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| 40 | #include "SynTree/Type.h" // for Type, BasicType, PointerType |
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| 41 | #include "SynTree/TypeSubstitution.h" // for TypeSubstitution |
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| 42 | #include "SynTree/Visitor.h" // for acceptAll, maybeAccept |
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[0a60c04] | 43 | #include "Tuples/Tuples.h" |
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[ea6332d] | 44 | #include "typeops.h" // for extractResultType |
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[1dcd9554] | 45 | #include "Unify.h" // for unify |
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[51b7345] | 46 | |
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[d9a0e76] | 47 | using namespace std; |
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[51b7345] | 48 | |
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[d9a0e76] | 49 | namespace ResolvExpr { |
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[0a60c04] | 50 | struct Resolver final : public WithIndexer, public WithGuards, public WithVisitorRef<Resolver>, public WithShortCircuiting, public WithStmtsToAdd { |
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[a4ca48c] | 51 | Resolver() {} |
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| 52 | Resolver( const SymTab::Indexer & other ) { |
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| 53 | indexer = other; |
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[1d2b64f] | 54 | } |
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[71f4e4f] | 55 | |
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[a4ca48c] | 56 | void previsit( FunctionDecl *functionDecl ); |
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| 57 | void postvisit( FunctionDecl *functionDecl ); |
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[3c398b6] | 58 | void previsit( ObjectDecl *objectDecll ); |
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[a4ca48c] | 59 | void previsit( TypeDecl *typeDecl ); |
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| 60 | void previsit( EnumDecl * enumDecl ); |
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[bd87b138] | 61 | void previsit( StaticAssertDecl * assertDecl ); |
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[a4ca48c] | 62 | |
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| 63 | void previsit( ArrayType * at ); |
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| 64 | void previsit( PointerType * at ); |
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| 65 | |
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| 66 | void previsit( ExprStmt *exprStmt ); |
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| 67 | void previsit( AsmExpr *asmExpr ); |
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| 68 | void previsit( AsmStmt *asmStmt ); |
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| 69 | void previsit( IfStmt *ifStmt ); |
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| 70 | void previsit( WhileStmt *whileStmt ); |
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| 71 | void previsit( ForStmt *forStmt ); |
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| 72 | void previsit( SwitchStmt *switchStmt ); |
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| 73 | void previsit( CaseStmt *caseStmt ); |
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| 74 | void previsit( BranchStmt *branchStmt ); |
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| 75 | void previsit( ReturnStmt *returnStmt ); |
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| 76 | void previsit( ThrowStmt *throwStmt ); |
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| 77 | void previsit( CatchStmt *catchStmt ); |
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[695e00d] | 78 | void previsit( WaitForStmt * stmt ); |
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[882ad37] | 79 | void previsit( WithStmt * withStmt ); |
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[a4ca48c] | 80 | |
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| 81 | void previsit( SingleInit *singleInit ); |
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| 82 | void previsit( ListInit *listInit ); |
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| 83 | void previsit( ConstructorInit *ctorInit ); |
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[a32b204] | 84 | private: |
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[c28a038d] | 85 | typedef std::list< Initializer * >::iterator InitIterator; |
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[94b4364] | 86 | |
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[40e636a] | 87 | template< typename PtrType > |
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| 88 | void handlePtrType( PtrType * type ); |
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| 89 | |
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[c28a038d] | 90 | void resolveWithExprs( std::list< Expression * > & withExprs, std::list< Statement * > & newStmts ); |
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| 91 | void fallbackInit( ConstructorInit * ctorInit ); |
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[b726084] | 92 | |
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[77971f6] | 93 | Type * functionReturn = nullptr; |
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[e4d829b] | 94 | CurrentObject currentObject = nullptr; |
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[a436947] | 95 | bool inEnumDecl = false; |
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[a32b204] | 96 | }; |
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[d9a0e76] | 97 | |
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[a32b204] | 98 | void resolve( std::list< Declaration * > translationUnit ) { |
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[a4ca48c] | 99 | PassVisitor<Resolver> resolver; |
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[a32b204] | 100 | acceptAll( translationUnit, resolver ); |
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[d9a0e76] | 101 | } |
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| 102 | |
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[8b11840] | 103 | void resolveDecl( Declaration * decl, const SymTab::Indexer &indexer ) { |
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| 104 | PassVisitor<Resolver> resolver( indexer ); |
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| 105 | maybeAccept( decl, resolver ); |
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| 106 | } |
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| 107 | |
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[c71b256] | 108 | namespace { |
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| 109 | struct DeleteFinder : public WithShortCircuiting { |
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| 110 | DeletedExpr * delExpr = nullptr; |
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| 111 | void previsit( DeletedExpr * expr ) { |
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| 112 | if ( delExpr ) visit_children = false; |
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| 113 | else delExpr = expr; |
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| 114 | } |
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| 115 | |
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| 116 | void previsit( Expression * ) { |
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| 117 | if ( delExpr ) visit_children = false; |
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| 118 | } |
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| 119 | }; |
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| 120 | } |
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| 121 | |
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| 122 | DeletedExpr * findDeletedExpr( Expression * expr ) { |
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| 123 | PassVisitor<DeleteFinder> finder; |
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| 124 | expr->accept( finder ); |
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| 125 | return finder.pass.delExpr; |
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[d9a0e76] | 126 | } |
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[a32b204] | 127 | |
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| 128 | namespace { |
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[cdb990a] | 129 | struct StripCasts { |
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| 130 | Expression * postmutate( CastExpr * castExpr ) { |
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| 131 | if ( castExpr->isGenerated && ResolvExpr::typesCompatible( castExpr->arg->result, castExpr->result, SymTab::Indexer() ) ) { |
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| 132 | // generated cast is to the same type as its argument, so it's unnecessary -- remove it |
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| 133 | Expression * expr = castExpr->arg; |
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| 134 | castExpr->arg = nullptr; |
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| 135 | std::swap( expr->env, castExpr->env ); |
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| 136 | return expr; |
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| 137 | } |
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| 138 | return castExpr; |
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| 139 | } |
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| 140 | |
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| 141 | static void strip( Expression *& expr ) { |
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| 142 | PassVisitor<StripCasts> stripper; |
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| 143 | expr = expr->acceptMutator( stripper ); |
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| 144 | } |
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| 145 | }; |
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| 146 | |
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| 147 | void finishExpr( Expression *&expr, const TypeEnvironment &env, TypeSubstitution * oldenv = nullptr ) { |
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[7664fad] | 148 | expr->env = oldenv ? oldenv->clone() : new TypeSubstitution; |
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[cdb990a] | 149 | env.makeSubstitution( *expr->env ); |
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| 150 | StripCasts::strip( expr ); // remove unnecessary casts that may be buried in an expression |
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[a32b204] | 151 | } |
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[0a22cda] | 152 | |
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| 153 | void removeExtraneousCast( Expression *& expr, const SymTab::Indexer & indexer ) { |
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| 154 | if ( CastExpr * castExpr = dynamic_cast< CastExpr * >( expr ) ) { |
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| 155 | if ( ResolvExpr::typesCompatible( castExpr->arg->result, castExpr->result, indexer ) ) { |
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| 156 | // cast is to the same type as its argument, so it's unnecessary -- remove it |
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| 157 | expr = castExpr->arg; |
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| 158 | castExpr->arg = nullptr; |
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| 159 | std::swap( expr->env, castExpr->env ); |
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| 160 | delete castExpr; |
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| 161 | } |
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| 162 | } |
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| 163 | } |
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[db4ecc5] | 164 | } // namespace |
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[a32b204] | 165 | |
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[8f98b78] | 166 | namespace { |
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[c71b256] | 167 | void findUnfinishedKindExpression(Expression * untyped, Alternative & alt, const SymTab::Indexer & indexer, const std::string & kindStr, std::function<bool(const Alternative &)> pred, bool adjust = false, bool prune = true, bool failFast = true) { |
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| 168 | assertf( untyped, "expected a non-null expression." ); |
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[8587878e] | 169 | TypeEnvironment env; |
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| 170 | AlternativeFinder finder( indexer, env ); |
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[c71b256] | 171 | finder.find( untyped, adjust, prune, failFast ); |
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| 172 | |
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| 173 | #if 0 |
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| 174 | if ( finder.get_alternatives().size() != 1 ) { |
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| 175 | std::cerr << "untyped expr is "; |
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| 176 | untyped->print( std::cerr ); |
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| 177 | std::cerr << std::endl << "alternatives are:"; |
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| 178 | for ( const Alternative & alt : finder.get_alternatives() ) { |
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| 179 | alt.print( std::cerr ); |
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| 180 | } // for |
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| 181 | } // if |
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| 182 | #endif |
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[8587878e] | 183 | |
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| 184 | AltList candidates; |
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| 185 | for ( Alternative & alt : finder.get_alternatives() ) { |
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[c71b256] | 186 | if ( pred( alt ) ) { |
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[8587878e] | 187 | candidates.push_back( std::move( alt ) ); |
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| 188 | } |
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| 189 | } |
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| 190 | |
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[c71b256] | 191 | // xxx - if > 1 alternative with same cost, ignore deleted and pick from remaining |
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[8587878e] | 192 | // choose the lowest cost expression among the candidates |
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| 193 | AltList winners; |
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| 194 | findMinCost( candidates.begin(), candidates.end(), back_inserter( winners ) ); |
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| 195 | if ( winners.size() == 0 ) { |
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[a16764a6] | 196 | SemanticError( untyped, toString( "No reasonable alternatives for ", kindStr, (kindStr != "" ? " " : ""), "expression: ") ); |
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[8587878e] | 197 | } else if ( winners.size() != 1 ) { |
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| 198 | std::ostringstream stream; |
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[c71b256] | 199 | stream << "Cannot choose between " << winners.size() << " alternatives for " << kindStr << (kindStr != "" ? " " : "") << "expression\n"; |
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[8587878e] | 200 | untyped->print( stream ); |
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[93401f8] | 201 | stream << " Alternatives are:\n"; |
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[8587878e] | 202 | printAlts( winners, stream, 1 ); |
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[a16764a6] | 203 | SemanticError( untyped->location, stream.str() ); |
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[8587878e] | 204 | } |
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| 205 | |
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| 206 | // there is one unambiguous interpretation - move the expression into the with statement |
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[c71b256] | 207 | Alternative & choice = winners.front(); |
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| 208 | if ( findDeletedExpr( choice.expr ) ) { |
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[2a08c25] | 209 | SemanticError( untyped->location, choice.expr, "Unique best alternative includes deleted identifier in " ); |
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[c71b256] | 210 | } |
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| 211 | alt = std::move( choice ); |
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| 212 | } |
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| 213 | |
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| 214 | /// resolve `untyped` to the expression whose alternative satisfies `pred` with the lowest cost; kindStr is used for providing better error messages |
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| 215 | void findKindExpression(Expression *& untyped, const SymTab::Indexer & indexer, const std::string & kindStr, std::function<bool(const Alternative &)> pred, bool adjust = false, bool prune = true, bool failFast = true) { |
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| 216 | if ( ! untyped ) return; |
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| 217 | Alternative choice; |
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| 218 | findUnfinishedKindExpression( untyped, choice, indexer, kindStr, pred, adjust, prune, failFast ); |
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| 219 | finishExpr( choice.expr, choice.env, untyped->env ); |
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[8587878e] | 220 | delete untyped; |
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[c71b256] | 221 | untyped = choice.expr; |
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| 222 | choice.expr = nullptr; |
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[8587878e] | 223 | } |
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| 224 | |
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[c71b256] | 225 | bool standardAlternativeFilter( const Alternative & ) { |
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| 226 | // currently don't need to filter, under normal circumstances. |
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| 227 | // in the future, this may be useful for removing deleted expressions |
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| 228 | return true; |
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| 229 | } |
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| 230 | } // namespace |
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| 231 | |
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| 232 | // used in resolveTypeof |
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| 233 | Expression * resolveInVoidContext( Expression *expr, const SymTab::Indexer &indexer ) { |
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| 234 | TypeEnvironment env; |
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| 235 | return resolveInVoidContext( expr, indexer, env ); |
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| 236 | } |
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| 237 | |
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| 238 | Expression * resolveInVoidContext( Expression *expr, const SymTab::Indexer &indexer, TypeEnvironment &env ) { |
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| 239 | // it's a property of the language that a cast expression has either 1 or 0 interpretations; if it has 0 |
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| 240 | // interpretations, an exception has already been thrown. |
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| 241 | assertf( expr, "expected a non-null expression." ); |
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| 242 | |
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| 243 | static CastExpr untyped( nullptr ); // cast to void |
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[2a08c25] | 244 | untyped.location = expr->location; |
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[c71b256] | 245 | |
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| 246 | // set up and resolve expression cast to void |
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| 247 | untyped.arg = expr; |
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| 248 | Alternative choice; |
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| 249 | findUnfinishedKindExpression( &untyped, choice, indexer, "", standardAlternativeFilter, true ); |
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| 250 | CastExpr * castExpr = strict_dynamic_cast< CastExpr * >( choice.expr ); |
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| 251 | env = std::move( choice.env ); |
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| 252 | |
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| 253 | // clean up resolved expression |
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| 254 | Expression * ret = castExpr->arg; |
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| 255 | castExpr->arg = nullptr; |
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| 256 | |
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| 257 | // unlink the arg so that it isn't deleted twice at the end of the program |
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| 258 | untyped.arg = nullptr; |
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| 259 | return ret; |
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| 260 | } |
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| 261 | |
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| 262 | void findVoidExpression( Expression *& untyped, const SymTab::Indexer &indexer ) { |
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| 263 | resetTyVarRenaming(); |
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| 264 | TypeEnvironment env; |
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| 265 | Expression * newExpr = resolveInVoidContext( untyped, indexer, env ); |
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| 266 | finishExpr( newExpr, env, untyped->env ); |
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| 267 | delete untyped; |
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| 268 | untyped = newExpr; |
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| 269 | } |
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| 270 | |
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| 271 | void findSingleExpression( Expression *&untyped, const SymTab::Indexer &indexer ) { |
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| 272 | findKindExpression( untyped, indexer, "", standardAlternativeFilter ); |
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| 273 | } |
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| 274 | |
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| 275 | void findSingleExpression( Expression *& untyped, Type * type, const SymTab::Indexer & indexer ) { |
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| 276 | assert( untyped && type ); |
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[2a08c25] | 277 | // transfer location to generated cast for error purposes |
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| 278 | CodeLocation location = untyped->location; |
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[c71b256] | 279 | untyped = new CastExpr( untyped, type ); |
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[2a08c25] | 280 | untyped->location = location; |
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[c71b256] | 281 | findSingleExpression( untyped, indexer ); |
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| 282 | removeExtraneousCast( untyped, indexer ); |
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| 283 | } |
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| 284 | |
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| 285 | namespace { |
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| 286 | bool isIntegralType( const Alternative & alt ) { |
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| 287 | Type * type = alt.expr->result; |
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[a32b204] | 288 | if ( dynamic_cast< EnumInstType * >( type ) ) { |
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| 289 | return true; |
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| 290 | } else if ( BasicType *bt = dynamic_cast< BasicType * >( type ) ) { |
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| 291 | return bt->isInteger(); |
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[89e6ffc] | 292 | } else if ( dynamic_cast< ZeroType* >( type ) != nullptr || dynamic_cast< OneType* >( type ) != nullptr ) { |
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| 293 | return true; |
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[a32b204] | 294 | } else { |
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| 295 | return false; |
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| 296 | } // if |
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| 297 | } |
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[71f4e4f] | 298 | |
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[08da53d] | 299 | void findIntegralExpression( Expression *& untyped, const SymTab::Indexer &indexer ) { |
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[8587878e] | 300 | findKindExpression( untyped, indexer, "condition", isIntegralType ); |
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[a32b204] | 301 | } |
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| 302 | } |
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[71f4e4f] | 303 | |
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[a4ca48c] | 304 | void Resolver::previsit( ObjectDecl *objectDecl ) { |
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| 305 | Type *new_type = resolveTypeof( objectDecl->get_type(), indexer ); |
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[a32b204] | 306 | objectDecl->set_type( new_type ); |
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[3cfe27f] | 307 | // To handle initialization of routine pointers, e.g., int (*fp)(int) = foo(), means that class-variable |
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| 308 | // initContext is changed multiple time because the LHS is analysed twice. The second analysis changes |
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| 309 | // initContext because of a function type can contain object declarations in the return and parameter types. So |
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| 310 | // each value of initContext is retained, so the type on the first analysis is preserved and used for selecting |
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| 311 | // the RHS. |
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[a4ca48c] | 312 | GuardValue( currentObject ); |
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[e4d829b] | 313 | currentObject = CurrentObject( objectDecl->get_type() ); |
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| 314 | if ( inEnumDecl && dynamic_cast< EnumInstType * >( objectDecl->get_type() ) ) { |
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[a436947] | 315 | // enumerator initializers should not use the enum type to initialize, since |
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| 316 | // the enum type is still incomplete at this point. Use signed int instead. |
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[e4d829b] | 317 | currentObject = CurrentObject( new BasicType( Type::Qualifiers(), BasicType::SignedInt ) ); |
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[a436947] | 318 | } |
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[bfbf97f] | 319 | } |
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| 320 | |
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[40e636a] | 321 | template< typename PtrType > |
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| 322 | void Resolver::handlePtrType( PtrType * type ) { |
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| 323 | if ( type->get_dimension() ) { |
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[08da53d] | 324 | findSingleExpression( type->dimension, SymTab::SizeType->clone(), indexer ); |
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[d1d17f5] | 325 | } |
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[40e636a] | 326 | } |
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| 327 | |
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[a4ca48c] | 328 | void Resolver::previsit( ArrayType * at ) { |
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[40e636a] | 329 | handlePtrType( at ); |
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[a32b204] | 330 | } |
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[94b4364] | 331 | |
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[a4ca48c] | 332 | void Resolver::previsit( PointerType * pt ) { |
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[40e636a] | 333 | handlePtrType( pt ); |
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| 334 | } |
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| 335 | |
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[a4ca48c] | 336 | void Resolver::previsit( TypeDecl *typeDecl ) { |
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[a32b204] | 337 | if ( typeDecl->get_base() ) { |
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[a4ca48c] | 338 | Type *new_type = resolveTypeof( typeDecl->get_base(), indexer ); |
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[a32b204] | 339 | typeDecl->set_base( new_type ); |
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| 340 | } // if |
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| 341 | } |
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[94b4364] | 342 | |
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[a4ca48c] | 343 | void Resolver::previsit( FunctionDecl *functionDecl ) { |
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[d9a0e76] | 344 | #if 0 |
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[a4ca48c] | 345 | std::cerr << "resolver visiting functiondecl "; |
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| 346 | functionDecl->print( std::cerr ); |
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| 347 | std::cerr << std::endl; |
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[d9a0e76] | 348 | #endif |
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[c28a038d] | 349 | Type *new_type = resolveTypeof( functionDecl->type, indexer ); |
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[a32b204] | 350 | functionDecl->set_type( new_type ); |
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[a4ca48c] | 351 | GuardValue( functionReturn ); |
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[60914351] | 352 | functionReturn = ResolvExpr::extractResultType( functionDecl->type ); |
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| 353 | |
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| 354 | { |
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| 355 | // resolve with-exprs with parameters in scope and add any newly generated declarations to the |
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| 356 | // front of the function body. |
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| 357 | auto guard = makeFuncGuard( [this]() { indexer.enterScope(); }, [this](){ indexer.leaveScope(); } ); |
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| 358 | indexer.addFunctionType( functionDecl->type ); |
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| 359 | std::list< Statement * > newStmts; |
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| 360 | resolveWithExprs( functionDecl->withExprs, newStmts ); |
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[a33fdbe] | 361 | if ( functionDecl->statements ) { |
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| 362 | functionDecl->statements->kids.splice( functionDecl->statements->kids.begin(), newStmts ); |
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| 363 | } else { |
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| 364 | assertf( functionDecl->withExprs.empty() && newStmts.empty(), "Function %s without a body has with-clause and/or generated with declarations.", functionDecl->name.c_str() ); |
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| 365 | } |
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[60914351] | 366 | } |
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[a4ca48c] | 367 | } |
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[88d1066] | 368 | |
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[a4ca48c] | 369 | void Resolver::postvisit( FunctionDecl *functionDecl ) { |
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[88d1066] | 370 | // default value expressions have an environment which shouldn't be there and trips up later passes. |
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| 371 | // xxx - it might be necessary to somehow keep the information from this environment, but I can't currently |
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| 372 | // see how it's useful. |
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[c28a038d] | 373 | for ( Declaration * d : functionDecl->type->parameters ) { |
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[88d1066] | 374 | if ( ObjectDecl * obj = dynamic_cast< ObjectDecl * >( d ) ) { |
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[c28a038d] | 375 | if ( SingleInit * init = dynamic_cast< SingleInit * >( obj->init ) ) { |
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| 376 | delete init->value->env; |
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| 377 | init->value->env = nullptr; |
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[88d1066] | 378 | } |
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| 379 | } |
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| 380 | } |
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[a32b204] | 381 | } |
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[51b7345] | 382 | |
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[a4ca48c] | 383 | void Resolver::previsit( EnumDecl * ) { |
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[a436947] | 384 | // in case we decide to allow nested enums |
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[a4ca48c] | 385 | GuardValue( inEnumDecl ); |
---|
[a436947] | 386 | inEnumDecl = true; |
---|
| 387 | } |
---|
| 388 | |
---|
[bd87b138] | 389 | void Resolver::previsit( StaticAssertDecl * assertDecl ) { |
---|
| 390 | findIntegralExpression( assertDecl->condition, indexer ); |
---|
| 391 | } |
---|
| 392 | |
---|
[a4ca48c] | 393 | void Resolver::previsit( ExprStmt *exprStmt ) { |
---|
| 394 | visit_children = false; |
---|
[08da53d] | 395 | assertf( exprStmt->expr, "ExprStmt has null Expression in resolver" ); |
---|
| 396 | findVoidExpression( exprStmt->expr, indexer ); |
---|
[a32b204] | 397 | } |
---|
[51b7345] | 398 | |
---|
[a4ca48c] | 399 | void Resolver::previsit( AsmExpr *asmExpr ) { |
---|
| 400 | visit_children = false; |
---|
[08da53d] | 401 | findVoidExpression( asmExpr->operand, indexer ); |
---|
[7f5566b] | 402 | if ( asmExpr->get_inout() ) { |
---|
[08da53d] | 403 | findVoidExpression( asmExpr->inout, indexer ); |
---|
[7f5566b] | 404 | } // if |
---|
| 405 | } |
---|
| 406 | |
---|
[a4ca48c] | 407 | void Resolver::previsit( AsmStmt *asmStmt ) { |
---|
| 408 | visit_children = false; |
---|
| 409 | acceptAll( asmStmt->get_input(), *visitor ); |
---|
| 410 | acceptAll( asmStmt->get_output(), *visitor ); |
---|
[7f5566b] | 411 | } |
---|
| 412 | |
---|
[a4ca48c] | 413 | void Resolver::previsit( IfStmt *ifStmt ) { |
---|
[8587878e] | 414 | findIntegralExpression( ifStmt->condition, indexer ); |
---|
[a32b204] | 415 | } |
---|
[51b7345] | 416 | |
---|
[a4ca48c] | 417 | void Resolver::previsit( WhileStmt *whileStmt ) { |
---|
[8587878e] | 418 | findIntegralExpression( whileStmt->condition, indexer ); |
---|
[a32b204] | 419 | } |
---|
[51b7345] | 420 | |
---|
[a4ca48c] | 421 | void Resolver::previsit( ForStmt *forStmt ) { |
---|
[08da53d] | 422 | if ( forStmt->condition ) { |
---|
[8587878e] | 423 | findIntegralExpression( forStmt->condition, indexer ); |
---|
[a32b204] | 424 | } // if |
---|
[71f4e4f] | 425 | |
---|
[08da53d] | 426 | if ( forStmt->increment ) { |
---|
| 427 | findVoidExpression( forStmt->increment, indexer ); |
---|
[a32b204] | 428 | } // if |
---|
| 429 | } |
---|
[51b7345] | 430 | |
---|
[a4ca48c] | 431 | void Resolver::previsit( SwitchStmt *switchStmt ) { |
---|
| 432 | GuardValue( currentObject ); |
---|
[08da53d] | 433 | findIntegralExpression( switchStmt->condition, indexer ); |
---|
[71f4e4f] | 434 | |
---|
[08da53d] | 435 | currentObject = CurrentObject( switchStmt->condition->result ); |
---|
[a32b204] | 436 | } |
---|
[51b7345] | 437 | |
---|
[a4ca48c] | 438 | void Resolver::previsit( CaseStmt *caseStmt ) { |
---|
[cdb990a] | 439 | if ( caseStmt->condition ) { |
---|
[e4d829b] | 440 | std::list< InitAlternative > initAlts = currentObject.getOptions(); |
---|
| 441 | assertf( initAlts.size() == 1, "SwitchStmt did not correctly resolve an integral expression." ); |
---|
[08da53d] | 442 | // must remove cast from case statement because RangeExpr cannot be cast. |
---|
| 443 | Expression * newExpr = new CastExpr( caseStmt->condition, initAlts.front().type->clone() ); |
---|
| 444 | findSingleExpression( newExpr, indexer ); |
---|
[cdb990a] | 445 | // case condition cannot have a cast in C, so it must be removed, regardless of whether it performs a conversion. |
---|
| 446 | // Ideally we would perform the conversion internally here. |
---|
| 447 | if ( CastExpr * castExpr = dynamic_cast< CastExpr * >( newExpr ) ) { |
---|
| 448 | newExpr = castExpr->arg; |
---|
| 449 | castExpr->arg = nullptr; |
---|
| 450 | std::swap( newExpr->env, castExpr->env ); |
---|
| 451 | delete castExpr; |
---|
| 452 | } |
---|
| 453 | caseStmt->condition = newExpr; |
---|
[32b8144] | 454 | } |
---|
[a32b204] | 455 | } |
---|
[51b7345] | 456 | |
---|
[a4ca48c] | 457 | void Resolver::previsit( BranchStmt *branchStmt ) { |
---|
| 458 | visit_children = false; |
---|
[de62360d] | 459 | // must resolve the argument for a computed goto |
---|
| 460 | if ( branchStmt->get_type() == BranchStmt::Goto ) { // check for computed goto statement |
---|
[08da53d] | 461 | if ( branchStmt->computedTarget ) { |
---|
| 462 | // computed goto argument is void * |
---|
| 463 | findSingleExpression( branchStmt->computedTarget, new PointerType( Type::Qualifiers(), new VoidType( Type::Qualifiers() ) ), indexer ); |
---|
[de62360d] | 464 | } // if |
---|
| 465 | } // if |
---|
| 466 | } |
---|
| 467 | |
---|
[a4ca48c] | 468 | void Resolver::previsit( ReturnStmt *returnStmt ) { |
---|
| 469 | visit_children = false; |
---|
[08da53d] | 470 | if ( returnStmt->expr ) { |
---|
| 471 | findSingleExpression( returnStmt->expr, functionReturn->clone(), indexer ); |
---|
[a32b204] | 472 | } // if |
---|
| 473 | } |
---|
[51b7345] | 474 | |
---|
[a4ca48c] | 475 | void Resolver::previsit( ThrowStmt *throwStmt ) { |
---|
| 476 | visit_children = false; |
---|
[cbce272] | 477 | // TODO: Replace *exception type with &exception type. |
---|
[307a732] | 478 | if ( throwStmt->get_expr() ) { |
---|
[cbce272] | 479 | StructDecl * exception_decl = |
---|
[36982fc] | 480 | indexer.lookupStruct( "__cfaabi_ehm__base_exception_t" ); |
---|
[cbce272] | 481 | assert( exception_decl ); |
---|
[08da53d] | 482 | Type * exceptType = new PointerType( noQualifiers, new StructInstType( noQualifiers, exception_decl ) ); |
---|
| 483 | findSingleExpression( throwStmt->expr, exceptType, indexer ); |
---|
[307a732] | 484 | } |
---|
| 485 | } |
---|
| 486 | |
---|
[a4ca48c] | 487 | void Resolver::previsit( CatchStmt *catchStmt ) { |
---|
[08da53d] | 488 | if ( catchStmt->cond ) { |
---|
| 489 | findSingleExpression( catchStmt->cond, new BasicType( noQualifiers, BasicType::Bool ), indexer ); |
---|
[cbce272] | 490 | } |
---|
| 491 | } |
---|
| 492 | |
---|
[1dcd9554] | 493 | template< typename iterator_t > |
---|
| 494 | inline bool advance_to_mutex( iterator_t & it, const iterator_t & end ) { |
---|
| 495 | while( it != end && !(*it)->get_type()->get_mutex() ) { |
---|
| 496 | it++; |
---|
| 497 | } |
---|
| 498 | |
---|
| 499 | return it != end; |
---|
| 500 | } |
---|
| 501 | |
---|
[695e00d] | 502 | void Resolver::previsit( WaitForStmt * stmt ) { |
---|
[8f98b78] | 503 | visit_children = false; |
---|
[1dcd9554] | 504 | |
---|
| 505 | // Resolve all clauses first |
---|
| 506 | for( auto& clause : stmt->clauses ) { |
---|
| 507 | |
---|
| 508 | TypeEnvironment env; |
---|
[8f98b78] | 509 | AlternativeFinder funcFinder( indexer, env ); |
---|
[1dcd9554] | 510 | |
---|
| 511 | // Find all alternatives for a function in canonical form |
---|
| 512 | funcFinder.findWithAdjustment( clause.target.function ); |
---|
| 513 | |
---|
| 514 | if ( funcFinder.get_alternatives().empty() ) { |
---|
| 515 | stringstream ss; |
---|
| 516 | ss << "Use of undeclared indentifier '"; |
---|
| 517 | ss << strict_dynamic_cast<NameExpr*>( clause.target.function )->name; |
---|
| 518 | ss << "' in call to waitfor"; |
---|
[a16764a6] | 519 | SemanticError( stmt->location, ss.str() ); |
---|
[1dcd9554] | 520 | } |
---|
| 521 | |
---|
[b9f383f] | 522 | if(clause.target.arguments.empty()) { |
---|
| 523 | SemanticError( stmt->location, "Waitfor clause must have at least one mutex parameter"); |
---|
| 524 | } |
---|
| 525 | |
---|
[1dcd9554] | 526 | // Find all alternatives for all arguments in canonical form |
---|
[bd4f2e9] | 527 | std::vector< AlternativeFinder > argAlternatives; |
---|
[1dcd9554] | 528 | funcFinder.findSubExprs( clause.target.arguments.begin(), clause.target.arguments.end(), back_inserter( argAlternatives ) ); |
---|
| 529 | |
---|
| 530 | // List all combinations of arguments |
---|
[bd4f2e9] | 531 | std::vector< AltList > possibilities; |
---|
[1dcd9554] | 532 | combos( argAlternatives.begin(), argAlternatives.end(), back_inserter( possibilities ) ); |
---|
| 533 | |
---|
| 534 | AltList func_candidates; |
---|
| 535 | std::vector< AltList > args_candidates; |
---|
| 536 | |
---|
| 537 | // For every possible function : |
---|
| 538 | // try matching the arguments to the parameters |
---|
| 539 | // not the other way around because we have more arguments than parameters |
---|
[a16764a6] | 540 | SemanticErrorException errors; |
---|
[1dcd9554] | 541 | for ( Alternative & func : funcFinder.get_alternatives() ) { |
---|
| 542 | try { |
---|
| 543 | PointerType * pointer = dynamic_cast< PointerType* >( func.expr->get_result()->stripReferences() ); |
---|
| 544 | if( !pointer ) { |
---|
[a16764a6] | 545 | SemanticError( func.expr->get_result(), "candidate not viable: not a pointer type\n" ); |
---|
[1dcd9554] | 546 | } |
---|
| 547 | |
---|
| 548 | FunctionType * function = dynamic_cast< FunctionType* >( pointer->get_base() ); |
---|
| 549 | if( !function ) { |
---|
[a16764a6] | 550 | SemanticError( pointer->get_base(), "candidate not viable: not a function type\n" ); |
---|
[1dcd9554] | 551 | } |
---|
| 552 | |
---|
| 553 | |
---|
| 554 | { |
---|
| 555 | auto param = function->parameters.begin(); |
---|
| 556 | auto param_end = function->parameters.end(); |
---|
| 557 | |
---|
| 558 | if( !advance_to_mutex( param, param_end ) ) { |
---|
[a16764a6] | 559 | SemanticError(function, "candidate function not viable: no mutex parameters\n"); |
---|
[1dcd9554] | 560 | } |
---|
| 561 | } |
---|
| 562 | |
---|
| 563 | Alternative newFunc( func ); |
---|
| 564 | // Strip reference from function |
---|
[a181494] | 565 | referenceToRvalueConversion( newFunc.expr, newFunc.cost ); |
---|
[1dcd9554] | 566 | |
---|
| 567 | // For all the set of arguments we have try to match it with the parameter of the current function alternative |
---|
| 568 | for ( auto & argsList : possibilities ) { |
---|
| 569 | |
---|
| 570 | try { |
---|
| 571 | // Declare data structures need for resolution |
---|
| 572 | OpenVarSet openVars; |
---|
| 573 | AssertionSet resultNeed, resultHave; |
---|
[6f326b1] | 574 | TypeEnvironment resultEnv( func.env ); |
---|
| 575 | makeUnifiableVars( function, openVars, resultNeed ); |
---|
| 576 | // add all type variables as open variables now so that those not used in the parameter |
---|
| 577 | // list are still considered open. |
---|
| 578 | resultEnv.add( function->forall ); |
---|
[1dcd9554] | 579 | |
---|
| 580 | // Load type variables from arguemnts into one shared space |
---|
| 581 | simpleCombineEnvironments( argsList.begin(), argsList.end(), resultEnv ); |
---|
| 582 | |
---|
| 583 | // Make sure we don't widen any existing bindings |
---|
[d286cf68] | 584 | resultEnv.forbidWidening(); |
---|
[c5283ba] | 585 | |
---|
[1dcd9554] | 586 | // Find any unbound type variables |
---|
| 587 | resultEnv.extractOpenVars( openVars ); |
---|
| 588 | |
---|
| 589 | auto param = function->parameters.begin(); |
---|
| 590 | auto param_end = function->parameters.end(); |
---|
| 591 | |
---|
[c5283ba] | 592 | int n_mutex_param = 0; |
---|
[b9f383f] | 593 | |
---|
[1dcd9554] | 594 | // For every arguments of its set, check if it matches one of the parameter |
---|
| 595 | // The order is important |
---|
| 596 | for( auto & arg : argsList ) { |
---|
| 597 | |
---|
| 598 | // Ignore non-mutex arguments |
---|
| 599 | if( !advance_to_mutex( param, param_end ) ) { |
---|
| 600 | // We ran out of parameters but still have arguments |
---|
| 601 | // this function doesn't match |
---|
[c5283ba] | 602 | SemanticError( function, toString("candidate function not viable: too many mutex arguments, expected ", n_mutex_param, "\n" )); |
---|
[1dcd9554] | 603 | } |
---|
| 604 | |
---|
[c5283ba] | 605 | n_mutex_param++; |
---|
[b9f383f] | 606 | |
---|
[1dcd9554] | 607 | // Check if the argument matches the parameter type in the current scope |
---|
[b9f383f] | 608 | if( ! unify( arg.expr->get_result(), (*param)->get_type(), resultEnv, resultNeed, resultHave, openVars, this->indexer ) ) { |
---|
[1dcd9554] | 609 | // Type doesn't match |
---|
| 610 | stringstream ss; |
---|
| 611 | ss << "candidate function not viable: no known convertion from '"; |
---|
| 612 | (*param)->get_type()->print( ss ); |
---|
[b9f383f] | 613 | ss << "' to '"; |
---|
| 614 | arg.expr->get_result()->print( ss ); |
---|
[5248789] | 615 | ss << "' with env '"; |
---|
| 616 | resultEnv.print(ss); |
---|
[1dcd9554] | 617 | ss << "'\n"; |
---|
[a16764a6] | 618 | SemanticError( function, ss.str() ); |
---|
[1dcd9554] | 619 | } |
---|
| 620 | |
---|
| 621 | param++; |
---|
| 622 | } |
---|
| 623 | |
---|
| 624 | // All arguments match ! |
---|
| 625 | |
---|
| 626 | // Check if parameters are missing |
---|
| 627 | if( advance_to_mutex( param, param_end ) ) { |
---|
[c5283ba] | 628 | do { |
---|
| 629 | n_mutex_param++; |
---|
| 630 | param++; |
---|
| 631 | } while( advance_to_mutex( param, param_end ) ); |
---|
| 632 | |
---|
[1dcd9554] | 633 | // We ran out of arguments but still have parameters left |
---|
| 634 | // this function doesn't match |
---|
[c5283ba] | 635 | SemanticError( function, toString("candidate function not viable: too few mutex arguments, expected ", n_mutex_param, "\n" )); |
---|
[1dcd9554] | 636 | } |
---|
| 637 | |
---|
| 638 | // All parameters match ! |
---|
| 639 | |
---|
| 640 | // Finish the expressions to tie in the proper environments |
---|
| 641 | finishExpr( newFunc.expr, resultEnv ); |
---|
| 642 | for( Alternative & alt : argsList ) { |
---|
| 643 | finishExpr( alt.expr, resultEnv ); |
---|
| 644 | } |
---|
| 645 | |
---|
| 646 | // This is a match store it and save it for later |
---|
| 647 | func_candidates.push_back( newFunc ); |
---|
| 648 | args_candidates.push_back( argsList ); |
---|
| 649 | |
---|
| 650 | } |
---|
[a16764a6] | 651 | catch( SemanticErrorException &e ) { |
---|
[1dcd9554] | 652 | errors.append( e ); |
---|
| 653 | } |
---|
| 654 | } |
---|
| 655 | } |
---|
[a16764a6] | 656 | catch( SemanticErrorException &e ) { |
---|
[1dcd9554] | 657 | errors.append( e ); |
---|
| 658 | } |
---|
| 659 | } |
---|
| 660 | |
---|
| 661 | // Make sure we got the right number of arguments |
---|
[a16764a6] | 662 | if( func_candidates.empty() ) { SemanticErrorException top( stmt->location, "No alternatives for function in call to waitfor" ); top.append( errors ); throw top; } |
---|
| 663 | if( args_candidates.empty() ) { SemanticErrorException top( stmt->location, "No alternatives for arguments in call to waitfor" ); top.append( errors ); throw top; } |
---|
| 664 | if( func_candidates.size() > 1 ) { SemanticErrorException top( stmt->location, "Ambiguous function in call to waitfor" ); top.append( errors ); throw top; } |
---|
| 665 | if( args_candidates.size() > 1 ) { SemanticErrorException top( stmt->location, "Ambiguous arguments in call to waitfor" ); top.append( errors ); throw top; } |
---|
[c71b256] | 666 | // TODO: need to use findDeletedExpr to ensure no deleted identifiers are used. |
---|
[1dcd9554] | 667 | |
---|
| 668 | // Swap the results from the alternative with the unresolved values. |
---|
| 669 | // Alternatives will handle deletion on destruction |
---|
| 670 | std::swap( clause.target.function, func_candidates.front().expr ); |
---|
| 671 | for( auto arg_pair : group_iterate( clause.target.arguments, args_candidates.front() ) ) { |
---|
| 672 | std::swap ( std::get<0>( arg_pair), std::get<1>( arg_pair).expr ); |
---|
| 673 | } |
---|
| 674 | |
---|
| 675 | // Resolve the conditions as if it were an IfStmt |
---|
| 676 | // Resolve the statments normally |
---|
[08da53d] | 677 | findSingleExpression( clause.condition, this->indexer ); |
---|
[8f98b78] | 678 | clause.statement->accept( *visitor ); |
---|
[1dcd9554] | 679 | } |
---|
| 680 | |
---|
| 681 | |
---|
| 682 | if( stmt->timeout.statement ) { |
---|
| 683 | // Resolve the timeout as an size_t for now |
---|
| 684 | // Resolve the conditions as if it were an IfStmt |
---|
| 685 | // Resolve the statments normally |
---|
[08da53d] | 686 | findSingleExpression( stmt->timeout.time, new BasicType( noQualifiers, BasicType::LongLongUnsignedInt ), this->indexer ); |
---|
| 687 | findSingleExpression( stmt->timeout.condition, this->indexer ); |
---|
[8f98b78] | 688 | stmt->timeout.statement->accept( *visitor ); |
---|
[1dcd9554] | 689 | } |
---|
| 690 | |
---|
| 691 | if( stmt->orelse.statement ) { |
---|
| 692 | // Resolve the conditions as if it were an IfStmt |
---|
| 693 | // Resolve the statments normally |
---|
[08da53d] | 694 | findSingleExpression( stmt->orelse.condition, this->indexer ); |
---|
[8f98b78] | 695 | stmt->orelse.statement->accept( *visitor ); |
---|
[1dcd9554] | 696 | } |
---|
| 697 | } |
---|
| 698 | |
---|
[c71b256] | 699 | bool isStructOrUnion( const Alternative & alt ) { |
---|
| 700 | Type * t = alt.expr->result->stripReferences(); |
---|
[882ad37] | 701 | return dynamic_cast< StructInstType * >( t ) || dynamic_cast< UnionInstType * >( t ); |
---|
| 702 | } |
---|
| 703 | |
---|
[c28a038d] | 704 | void Resolver::resolveWithExprs( std::list< Expression * > & withExprs, std::list< Statement * > & newStmts ) { |
---|
| 705 | for ( Expression *& expr : withExprs ) { |
---|
[882ad37] | 706 | // only struct- and union-typed expressions are viable candidates |
---|
[8587878e] | 707 | findKindExpression( expr, indexer, "with statement", isStructOrUnion ); |
---|
[0a60c04] | 708 | |
---|
| 709 | // if with expression might be impure, create a temporary so that it is evaluated once |
---|
| 710 | if ( Tuples::maybeImpure( expr ) ) { |
---|
| 711 | static UniqueName tmpNamer( "_with_tmp_" ); |
---|
| 712 | ObjectDecl * tmp = ObjectDecl::newObject( tmpNamer.newName(), expr->result->clone(), new SingleInit( expr ) ); |
---|
| 713 | expr = new VariableExpr( tmp ); |
---|
[c28a038d] | 714 | newStmts.push_back( new DeclStmt( tmp ) ); |
---|
[0a60c04] | 715 | if ( InitTweak::isConstructable( tmp->type ) ) { |
---|
| 716 | // generate ctor/dtor and resolve them |
---|
| 717 | tmp->init = InitTweak::genCtorInit( tmp ); |
---|
| 718 | tmp->accept( *visitor ); |
---|
| 719 | } |
---|
| 720 | } |
---|
[882ad37] | 721 | } |
---|
| 722 | } |
---|
| 723 | |
---|
[c28a038d] | 724 | void Resolver::previsit( WithStmt * withStmt ) { |
---|
| 725 | resolveWithExprs( withStmt->exprs, stmtsToAddBefore ); |
---|
| 726 | } |
---|
| 727 | |
---|
[b5c5684] | 728 | template< typename T > |
---|
| 729 | bool isCharType( T t ) { |
---|
| 730 | if ( BasicType * bt = dynamic_cast< BasicType * >( t ) ) { |
---|
[71f4e4f] | 731 | return bt->get_kind() == BasicType::Char || bt->get_kind() == BasicType::SignedChar || |
---|
[b5c5684] | 732 | bt->get_kind() == BasicType::UnsignedChar; |
---|
| 733 | } |
---|
| 734 | return false; |
---|
| 735 | } |
---|
| 736 | |
---|
[a4ca48c] | 737 | void Resolver::previsit( SingleInit *singleInit ) { |
---|
| 738 | visit_children = false; |
---|
[62423350] | 739 | // resolve initialization using the possibilities as determined by the currentObject cursor |
---|
[0a22cda] | 740 | Expression * newExpr = new UntypedInitExpr( singleInit->value, currentObject.getOptions() ); |
---|
[08da53d] | 741 | findSingleExpression( newExpr, indexer ); |
---|
[e3e16bc] | 742 | InitExpr * initExpr = strict_dynamic_cast< InitExpr * >( newExpr ); |
---|
[62423350] | 743 | |
---|
| 744 | // move cursor to the object that is actually initialized |
---|
[e4d829b] | 745 | currentObject.setNext( initExpr->get_designation() ); |
---|
[62423350] | 746 | |
---|
| 747 | // discard InitExpr wrapper and retain relevant pieces |
---|
[08da53d] | 748 | newExpr = initExpr->expr; |
---|
| 749 | initExpr->expr = nullptr; |
---|
| 750 | std::swap( initExpr->env, newExpr->env ); |
---|
[cdb990a] | 751 | // InitExpr may have inferParams in the case where the expression specializes a function pointer, |
---|
| 752 | // and newExpr may already have inferParams of its own, so a simple swap is not sufficient. |
---|
| 753 | newExpr->spliceInferParams( initExpr ); |
---|
[e4d829b] | 754 | delete initExpr; |
---|
| 755 | |
---|
[62423350] | 756 | // get the actual object's type (may not exactly match what comes back from the resolver due to conversions) |
---|
| 757 | Type * initContext = currentObject.getCurrentType(); |
---|
| 758 | |
---|
[0a22cda] | 759 | removeExtraneousCast( newExpr, indexer ); |
---|
| 760 | |
---|
[62423350] | 761 | // check if actual object's type is char[] |
---|
| 762 | if ( ArrayType * at = dynamic_cast< ArrayType * >( initContext ) ) { |
---|
| 763 | if ( isCharType( at->get_base() ) ) { |
---|
| 764 | // check if the resolved type is char * |
---|
| 765 | if ( PointerType * pt = dynamic_cast< PointerType *>( newExpr->get_result() ) ) { |
---|
| 766 | if ( isCharType( pt->get_base() ) ) { |
---|
[0a22cda] | 767 | if ( CastExpr *ce = dynamic_cast< CastExpr * >( newExpr ) ) { |
---|
| 768 | // strip cast if we're initializing a char[] with a char *, e.g. char x[] = "hello"; |
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| 769 | newExpr = ce->get_arg(); |
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| 770 | ce->set_arg( nullptr ); |
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| 771 | std::swap( ce->env, newExpr->env ); |
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| 772 | delete ce; |
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| 773 | } |
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[62423350] | 774 | } |
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| 775 | } |
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| 776 | } |
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| 777 | } |
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[94b4364] | 778 | |
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[62423350] | 779 | // set initializer expr to resolved express |
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[0a22cda] | 780 | singleInit->value = newExpr; |
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[62423350] | 781 | |
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| 782 | // move cursor to next object in preparation for next initializer |
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| 783 | currentObject.increment(); |
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| 784 | } |
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[94b4364] | 785 | |
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[a4ca48c] | 786 | void Resolver::previsit( ListInit * listInit ) { |
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| 787 | visit_children = false; |
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[62423350] | 788 | // move cursor into brace-enclosed initializer-list |
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[e4d829b] | 789 | currentObject.enterListInit(); |
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| 790 | // xxx - fix this so that the list isn't copied, iterator should be used to change current element |
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| 791 | std::list<Designation *> newDesignations; |
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| 792 | for ( auto p : group_iterate(listInit->get_designations(), listInit->get_initializers()) ) { |
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[62423350] | 793 | // iterate designations and initializers in pairs, moving the cursor to the current designated object and resolving |
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| 794 | // the initializer against that object. |
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[e4d829b] | 795 | Designation * des = std::get<0>(p); |
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| 796 | Initializer * init = std::get<1>(p); |
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| 797 | newDesignations.push_back( currentObject.findNext( des ) ); |
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[a4ca48c] | 798 | init->accept( *visitor ); |
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[b5c5684] | 799 | } |
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[62423350] | 800 | // set the set of 'resolved' designations and leave the brace-enclosed initializer-list |
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[e4d829b] | 801 | listInit->get_designations() = newDesignations; // xxx - memory management |
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| 802 | currentObject.exitListInit(); |
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| 803 | |
---|
[62423350] | 804 | // xxx - this part has not be folded into CurrentObject yet |
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[e4d829b] | 805 | // } else if ( TypeInstType * tt = dynamic_cast< TypeInstType * >( initContext ) ) { |
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| 806 | // Type * base = tt->get_baseType()->get_base(); |
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| 807 | // if ( base ) { |
---|
| 808 | // // know the implementation type, so try using that as the initContext |
---|
| 809 | // ObjectDecl tmpObj( "", Type::StorageClasses(), LinkageSpec::Cforall, nullptr, base->clone(), nullptr ); |
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| 810 | // currentObject = &tmpObj; |
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| 811 | // visit( listInit ); |
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| 812 | // } else { |
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| 813 | // // missing implementation type -- might be an unknown type variable, so try proceeding with the current init context |
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| 814 | // Parent::visit( listInit ); |
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| 815 | // } |
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| 816 | // } else { |
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[a32b204] | 817 | } |
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[71f4e4f] | 818 | |
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[f1e012b] | 819 | // ConstructorInit - fall back on C-style initializer |
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| 820 | void Resolver::fallbackInit( ConstructorInit * ctorInit ) { |
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| 821 | // could not find valid constructor, or found an intrinsic constructor |
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| 822 | // fall back on C-style initializer |
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| 823 | delete ctorInit->get_ctor(); |
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| 824 | ctorInit->set_ctor( NULL ); |
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[71a145de] | 825 | delete ctorInit->get_dtor(); |
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| 826 | ctorInit->set_dtor( NULL ); |
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[a4ca48c] | 827 | maybeAccept( ctorInit->get_init(), *visitor ); |
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[f1e012b] | 828 | } |
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| 829 | |
---|
[1d2b64f] | 830 | // needs to be callable from outside the resolver, so this is a standalone function |
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| 831 | void resolveCtorInit( ConstructorInit * ctorInit, const SymTab::Indexer & indexer ) { |
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| 832 | assert( ctorInit ); |
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[a4ca48c] | 833 | PassVisitor<Resolver> resolver( indexer ); |
---|
[1d2b64f] | 834 | ctorInit->accept( resolver ); |
---|
| 835 | } |
---|
| 836 | |
---|
| 837 | void resolveStmtExpr( StmtExpr * stmtExpr, const SymTab::Indexer & indexer ) { |
---|
| 838 | assert( stmtExpr ); |
---|
[a4ca48c] | 839 | PassVisitor<Resolver> resolver( indexer ); |
---|
[1d2b64f] | 840 | stmtExpr->accept( resolver ); |
---|
[5e2c348] | 841 | stmtExpr->computeResult(); |
---|
[dd05e12] | 842 | // xxx - aggregate the environments from all statements? Possibly in AlternativeFinder instead? |
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[1d2b64f] | 843 | } |
---|
| 844 | |
---|
[a4ca48c] | 845 | void Resolver::previsit( ConstructorInit *ctorInit ) { |
---|
| 846 | visit_children = false; |
---|
[1ba88a0] | 847 | // xxx - fallback init has been removed => remove fallbackInit function and remove complexity from FixInit and remove C-init from ConstructorInit |
---|
[dd05e12] | 848 | maybeAccept( ctorInit->ctor, *visitor ); |
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| 849 | maybeAccept( ctorInit->dtor, *visitor ); |
---|
[071a31a] | 850 | |
---|
[5b2f5bb] | 851 | // found a constructor - can get rid of C-style initializer |
---|
[dd05e12] | 852 | delete ctorInit->init; |
---|
| 853 | ctorInit->init = nullptr; |
---|
[ec79847] | 854 | |
---|
| 855 | // intrinsic single parameter constructors and destructors do nothing. Since this was |
---|
| 856 | // implicitly generated, there's no way for it to have side effects, so get rid of it |
---|
| 857 | // to clean up generated code. |
---|
[dd05e12] | 858 | if ( InitTweak::isIntrinsicSingleArgCallStmt( ctorInit->ctor ) ) { |
---|
| 859 | delete ctorInit->ctor; |
---|
| 860 | ctorInit->ctor = nullptr; |
---|
[ec79847] | 861 | } |
---|
[f9cebb5] | 862 | |
---|
[dd05e12] | 863 | if ( InitTweak::isIntrinsicSingleArgCallStmt( ctorInit->dtor ) ) { |
---|
| 864 | delete ctorInit->dtor; |
---|
| 865 | ctorInit->dtor = nullptr; |
---|
[ec79847] | 866 | } |
---|
[a465caf] | 867 | |
---|
| 868 | // xxx - todo -- what about arrays? |
---|
| 869 | // if ( dtor == NULL && InitTweak::isIntrinsicCallStmt( ctorInit->get_ctor() ) ) { |
---|
| 870 | // // can reduce the constructor down to a SingleInit using the |
---|
| 871 | // // second argument from the ctor call, since |
---|
| 872 | // delete ctorInit->get_ctor(); |
---|
| 873 | // ctorInit->set_ctor( NULL ); |
---|
| 874 | |
---|
| 875 | // Expression * arg = |
---|
| 876 | // ctorInit->set_init( new SingleInit( arg ) ); |
---|
| 877 | // } |
---|
[71f4e4f] | 878 | } |
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[51b7345] | 879 | } // namespace ResolvExpr |
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[a32b204] | 880 | |
---|
| 881 | // Local Variables: // |
---|
| 882 | // tab-width: 4 // |
---|
| 883 | // mode: c++ // |
---|
| 884 | // compile-command: "make install" // |
---|
| 885 | // End: // |
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