[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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[cbce272] | 11 | // Last Modified By : Andrew Beach
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| 12 | // Last Modified On : Tus Aug 8 16:06:00 2017
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| 13 | // Update Count : 212
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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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| 20 |
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| 21 | #include "Alternative.h" // for Alternative, AltList
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| 22 | #include "AlternativeFinder.h" // for AlternativeFinder, resolveIn...
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[a4ca48c] | 23 | #include "Common/PassVisitor.h" // for PassVisitor
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[ea6332d] | 24 | #include "Common/SemanticError.h" // for SemanticError
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| 25 | #include "Common/utility.h" // for ValueGuard, group_iterate
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| 26 | #include "CurrentObject.h" // for CurrentObject
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| 27 | #include "InitTweak/InitTweak.h" // for isIntrinsicSingleArgCallStmt
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| 28 | #include "RenameVars.h" // for RenameVars, global_renamer
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| 29 | #include "ResolvExpr/TypeEnvironment.h" // for TypeEnvironment
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| 30 | #include "ResolveTypeof.h" // for resolveTypeof
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[e4d829b] | 31 | #include "Resolver.h"
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[ea6332d] | 32 | #include "SymTab/Autogen.h" // for SizeType
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| 33 | #include "SymTab/Indexer.h" // for Indexer
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| 34 | #include "SynTree/Declaration.h" // for ObjectDecl, TypeDecl, Declar...
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| 35 | #include "SynTree/Expression.h" // for Expression, CastExpr, InitExpr
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| 36 | #include "SynTree/Initializer.h" // for ConstructorInit, SingleInit
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| 37 | #include "SynTree/Statement.h" // for ForStmt, Statement, BranchStmt
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| 38 | #include "SynTree/Type.h" // for Type, BasicType, PointerType
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| 39 | #include "SynTree/TypeSubstitution.h" // for TypeSubstitution
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| 40 | #include "SynTree/Visitor.h" // for acceptAll, maybeAccept
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| 41 | #include "typeops.h" // for extractResultType
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[1dcd9554] | 42 | #include "Unify.h" // for unify
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[51b73452] | 43 |
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[d9a0e76] | 44 | using namespace std;
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[51b73452] | 45 |
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[d9a0e76] | 46 | namespace ResolvExpr {
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[a4ca48c] | 47 | struct Resolver final : public WithIndexer, public WithGuards, public WithVisitorRef<Resolver>, public WithShortCircuiting {
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| 48 | Resolver() {}
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| 49 | Resolver( const SymTab::Indexer & other ) {
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| 50 | indexer = other;
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[1d2b64f] | 51 | }
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[71f4e4f] | 52 |
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[a4ca48c] | 53 | void previsit( FunctionDecl *functionDecl );
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| 54 | void postvisit( FunctionDecl *functionDecl );
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[3c398b6] | 55 | void previsit( ObjectDecl *objectDecll );
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[a4ca48c] | 56 | void previsit( TypeDecl *typeDecl );
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| 57 | void previsit( EnumDecl * enumDecl );
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| 58 |
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| 59 | void previsit( ArrayType * at );
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| 60 | void previsit( PointerType * at );
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| 61 |
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| 62 | void previsit( ExprStmt *exprStmt );
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| 63 | void previsit( AsmExpr *asmExpr );
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| 64 | void previsit( AsmStmt *asmStmt );
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| 65 | void previsit( IfStmt *ifStmt );
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| 66 | void previsit( WhileStmt *whileStmt );
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| 67 | void previsit( ForStmt *forStmt );
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| 68 | void previsit( SwitchStmt *switchStmt );
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| 69 | void previsit( CaseStmt *caseStmt );
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| 70 | void previsit( BranchStmt *branchStmt );
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| 71 | void previsit( ReturnStmt *returnStmt );
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| 72 | void previsit( ThrowStmt *throwStmt );
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| 73 | void previsit( CatchStmt *catchStmt );
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[695e00d] | 74 | void previsit( WaitForStmt * stmt );
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[a4ca48c] | 75 |
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| 76 | void previsit( SingleInit *singleInit );
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| 77 | void previsit( ListInit *listInit );
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| 78 | void previsit( ConstructorInit *ctorInit );
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[a32b204] | 79 | private:
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[94b4364] | 80 | typedef std::list< Initializer * >::iterator InitIterator;
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| 81 |
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[40e636a] | 82 | template< typename PtrType >
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| 83 | void handlePtrType( PtrType * type );
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| 84 |
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[30b65d8] | 85 | void resolveAggrInit( ReferenceToType *, InitIterator &, InitIterator & );
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| 86 | void resolveSingleAggrInit( Declaration *, InitIterator &, InitIterator &, TypeSubstitution sub );
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[f1e012b] | 87 | void fallbackInit( ConstructorInit * ctorInit );
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[b726084] | 88 |
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[77971f6] | 89 | Type * functionReturn = nullptr;
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[e4d829b] | 90 | CurrentObject currentObject = nullptr;
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[a436947] | 91 | bool inEnumDecl = false;
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[a32b204] | 92 | };
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[d9a0e76] | 93 |
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[a32b204] | 94 | void resolve( std::list< Declaration * > translationUnit ) {
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[a4ca48c] | 95 | PassVisitor<Resolver> resolver;
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[a32b204] | 96 | acceptAll( translationUnit, resolver );
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[d9a0e76] | 97 | }
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| 98 |
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[8b11840] | 99 | void resolveDecl( Declaration * decl, const SymTab::Indexer &indexer ) {
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| 100 | PassVisitor<Resolver> resolver( indexer );
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| 101 | maybeAccept( decl, resolver );
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| 102 | }
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| 103 |
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[a4ca48c] | 104 | // used in resolveTypeof
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[a32b204] | 105 | Expression *resolveInVoidContext( Expression *expr, const SymTab::Indexer &indexer ) {
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| 106 | TypeEnvironment env;
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| 107 | return resolveInVoidContext( expr, indexer, env );
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[d9a0e76] | 108 | }
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[a32b204] | 109 |
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| 110 | namespace {
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[7664fad] | 111 | void finishExpr( Expression *expr, const TypeEnvironment &env, TypeSubstitution * oldenv = nullptr ) {
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| 112 | expr->env = oldenv ? oldenv->clone() : new TypeSubstitution;
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[a32b204] | 113 | env.makeSubstitution( *expr->get_env() );
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| 114 | }
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[0a22cda] | 115 |
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| 116 | void removeExtraneousCast( Expression *& expr, const SymTab::Indexer & indexer ) {
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| 117 | if ( CastExpr * castExpr = dynamic_cast< CastExpr * >( expr ) ) {
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| 118 | if ( ResolvExpr::typesCompatible( castExpr->arg->result, castExpr->result, indexer ) ) {
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| 119 | // cast is to the same type as its argument, so it's unnecessary -- remove it
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| 120 | expr = castExpr->arg;
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| 121 | castExpr->arg = nullptr;
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| 122 | std::swap( expr->env, castExpr->env );
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| 123 | delete castExpr;
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| 124 | }
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| 125 | }
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| 126 | }
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[db4ecc5] | 127 | } // namespace
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[a32b204] | 128 |
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[08da53d] | 129 | void findVoidExpression( Expression *& untyped, const SymTab::Indexer &indexer ) {
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[db4ecc5] | 130 | global_renamer.reset();
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| 131 | TypeEnvironment env;
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| 132 | Expression *newExpr = resolveInVoidContext( untyped, indexer, env );
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[7664fad] | 133 | finishExpr( newExpr, env, untyped->env );
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[08da53d] | 134 | delete untyped;
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| 135 | untyped = newExpr;
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[db4ecc5] | 136 | }
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[71f4e4f] | 137 |
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[08da53d] | 138 | void findSingleExpression( Expression *&untyped, const SymTab::Indexer &indexer ) {
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| 139 | if ( ! untyped ) return;
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[8f98b78] | 140 | TypeEnvironment env;
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| 141 | AlternativeFinder finder( indexer, env );
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| 142 | finder.find( untyped );
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| 143 | #if 0
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| 144 | if ( finder.get_alternatives().size() != 1 ) {
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[7664fad] | 145 | std::cerr << "untyped expr is ";
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| 146 | untyped->print( std::cerr );
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| 147 | std::cerr << std::endl << "alternatives are:";
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| 148 | for ( const Alternative & alt : finder.get_alternatives() ) {
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| 149 | alt.print( std::cerr );
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[8f98b78] | 150 | } // for
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| 151 | } // if
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| 152 | #endif
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| 153 | assertf( finder.get_alternatives().size() == 1, "findSingleExpression: must have exactly one alternative at the end." );
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| 154 | Alternative &choice = finder.get_alternatives().front();
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| 155 | Expression *newExpr = choice.expr->clone();
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[7664fad] | 156 | finishExpr( newExpr, choice.env, untyped->env );
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[08da53d] | 157 | delete untyped;
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| 158 | untyped = newExpr;
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| 159 | }
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| 160 |
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| 161 | void findSingleExpression( Expression *& untyped, Type * type, const SymTab::Indexer & indexer ) {
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| 162 | assert( untyped && type );
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| 163 | untyped = new CastExpr( untyped, type );
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| 164 | findSingleExpression( untyped, indexer );
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[0a22cda] | 165 | removeExtraneousCast( untyped, indexer );
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[8f98b78] | 166 | }
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[d9a0e76] | 167 |
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[8f98b78] | 168 | namespace {
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[a32b204] | 169 | bool isIntegralType( Type *type ) {
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| 170 | if ( dynamic_cast< EnumInstType * >( type ) ) {
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| 171 | return true;
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| 172 | } else if ( BasicType *bt = dynamic_cast< BasicType * >( type ) ) {
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| 173 | return bt->isInteger();
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[89e6ffc] | 174 | } else if ( dynamic_cast< ZeroType* >( type ) != nullptr || dynamic_cast< OneType* >( type ) != nullptr ) {
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| 175 | return true;
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[a32b204] | 176 | } else {
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| 177 | return false;
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| 178 | } // if
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| 179 | }
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[71f4e4f] | 180 |
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[08da53d] | 181 | void findIntegralExpression( Expression *& untyped, const SymTab::Indexer &indexer ) {
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[a32b204] | 182 | TypeEnvironment env;
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| 183 | AlternativeFinder finder( indexer, env );
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| 184 | finder.find( untyped );
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[d9a0e76] | 185 | #if 0
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[a32b204] | 186 | if ( finder.get_alternatives().size() != 1 ) {
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| 187 | std::cout << "untyped expr is ";
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| 188 | untyped->print( std::cout );
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| 189 | std::cout << std::endl << "alternatives are:";
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| 190 | for ( std::list< Alternative >::const_iterator i = finder.get_alternatives().begin(); i != finder.get_alternatives().end(); ++i ) {
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| 191 | i->print( std::cout );
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| 192 | } // for
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| 193 | } // if
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[d9a0e76] | 194 | #endif
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[a32b204] | 195 | Expression *newExpr = 0;
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| 196 | const TypeEnvironment *newEnv = 0;
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| 197 | for ( AltList::const_iterator i = finder.get_alternatives().begin(); i != finder.get_alternatives().end(); ++i ) {
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[906e24d] | 198 | if ( i->expr->get_result()->size() == 1 && isIntegralType( i->expr->get_result() ) ) {
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[a32b204] | 199 | if ( newExpr ) {
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| 200 | throw SemanticError( "Too many interpretations for case control expression", untyped );
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| 201 | } else {
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| 202 | newExpr = i->expr->clone();
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| 203 | newEnv = &i->env;
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| 204 | } // if
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| 205 | } // if
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| 206 | } // for
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| 207 | if ( ! newExpr ) {
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| 208 | throw SemanticError( "No interpretations for case control expression", untyped );
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| 209 | } // if
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[7664fad] | 210 | finishExpr( newExpr, *newEnv, untyped->env );
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[08da53d] | 211 | delete untyped;
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| 212 | untyped = newExpr;
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[a32b204] | 213 | }
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[71f4e4f] | 214 |
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[a32b204] | 215 | }
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[71f4e4f] | 216 |
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[a4ca48c] | 217 | void Resolver::previsit( ObjectDecl *objectDecl ) {
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| 218 | Type *new_type = resolveTypeof( objectDecl->get_type(), indexer );
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[a32b204] | 219 | objectDecl->set_type( new_type );
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[3cfe27f] | 220 | // To handle initialization of routine pointers, e.g., int (*fp)(int) = foo(), means that class-variable
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| 221 | // initContext is changed multiple time because the LHS is analysed twice. The second analysis changes
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| 222 | // initContext because of a function type can contain object declarations in the return and parameter types. So
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| 223 | // each value of initContext is retained, so the type on the first analysis is preserved and used for selecting
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| 224 | // the RHS.
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[a4ca48c] | 225 | GuardValue( currentObject );
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[e4d829b] | 226 | currentObject = CurrentObject( objectDecl->get_type() );
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| 227 | if ( inEnumDecl && dynamic_cast< EnumInstType * >( objectDecl->get_type() ) ) {
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[a436947] | 228 | // enumerator initializers should not use the enum type to initialize, since
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| 229 | // the enum type is still incomplete at this point. Use signed int instead.
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[e4d829b] | 230 | currentObject = CurrentObject( new BasicType( Type::Qualifiers(), BasicType::SignedInt ) );
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[a436947] | 231 | }
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[bfbf97f] | 232 | }
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| 233 |
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[40e636a] | 234 | template< typename PtrType >
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| 235 | void Resolver::handlePtrType( PtrType * type ) {
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| 236 | if ( type->get_dimension() ) {
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[08da53d] | 237 | findSingleExpression( type->dimension, SymTab::SizeType->clone(), indexer );
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[d1d17f5] | 238 | }
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[40e636a] | 239 | }
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| 240 |
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[a4ca48c] | 241 | void Resolver::previsit( ArrayType * at ) {
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[40e636a] | 242 | handlePtrType( at );
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[a32b204] | 243 | }
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[94b4364] | 244 |
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[a4ca48c] | 245 | void Resolver::previsit( PointerType * pt ) {
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[40e636a] | 246 | handlePtrType( pt );
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| 247 | }
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| 248 |
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[a4ca48c] | 249 | void Resolver::previsit( TypeDecl *typeDecl ) {
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[a32b204] | 250 | if ( typeDecl->get_base() ) {
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[a4ca48c] | 251 | Type *new_type = resolveTypeof( typeDecl->get_base(), indexer );
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[a32b204] | 252 | typeDecl->set_base( new_type );
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| 253 | } // if
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| 254 | }
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[94b4364] | 255 |
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[a4ca48c] | 256 | void Resolver::previsit( FunctionDecl *functionDecl ) {
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[d9a0e76] | 257 | #if 0
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[a4ca48c] | 258 | std::cerr << "resolver visiting functiondecl ";
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| 259 | functionDecl->print( std::cerr );
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| 260 | std::cerr << std::endl;
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[d9a0e76] | 261 | #endif
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[a4ca48c] | 262 | Type *new_type = resolveTypeof( functionDecl->get_type(), indexer );
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[a32b204] | 263 | functionDecl->set_type( new_type );
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[a4ca48c] | 264 | GuardValue( functionReturn );
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[906e24d] | 265 | functionReturn = ResolvExpr::extractResultType( functionDecl->get_functionType() );
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[a4ca48c] | 266 | }
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[88d1066] | 267 |
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[a4ca48c] | 268 | void Resolver::postvisit( FunctionDecl *functionDecl ) {
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[88d1066] | 269 | // default value expressions have an environment which shouldn't be there and trips up later passes.
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| 270 | // xxx - it might be necessary to somehow keep the information from this environment, but I can't currently
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| 271 | // see how it's useful.
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| 272 | for ( Declaration * d : functionDecl->get_functionType()->get_parameters() ) {
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| 273 | if ( ObjectDecl * obj = dynamic_cast< ObjectDecl * >( d ) ) {
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| 274 | if ( SingleInit * init = dynamic_cast< SingleInit * >( obj->get_init() ) ) {
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| 275 | delete init->get_value()->get_env();
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| 276 | init->get_value()->set_env( nullptr );
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| 277 | }
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| 278 | }
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| 279 | }
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[a32b204] | 280 | }
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[51b73452] | 281 |
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[a4ca48c] | 282 | void Resolver::previsit( EnumDecl * ) {
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[a436947] | 283 | // in case we decide to allow nested enums
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[a4ca48c] | 284 | GuardValue( inEnumDecl );
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[a436947] | 285 | inEnumDecl = true;
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| 286 | }
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| 287 |
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[a4ca48c] | 288 | void Resolver::previsit( ExprStmt *exprStmt ) {
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| 289 | visit_children = false;
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[08da53d] | 290 | assertf( exprStmt->expr, "ExprStmt has null Expression in resolver" );
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| 291 | findVoidExpression( exprStmt->expr, indexer );
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[a32b204] | 292 | }
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[51b73452] | 293 |
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[a4ca48c] | 294 | void Resolver::previsit( AsmExpr *asmExpr ) {
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| 295 | visit_children = false;
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[08da53d] | 296 | findVoidExpression( asmExpr->operand, indexer );
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[7f5566b] | 297 | if ( asmExpr->get_inout() ) {
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[08da53d] | 298 | findVoidExpression( asmExpr->inout, indexer );
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[7f5566b] | 299 | } // if
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| 300 | }
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| 301 |
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[a4ca48c] | 302 | void Resolver::previsit( AsmStmt *asmStmt ) {
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| 303 | visit_children = false;
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| 304 | acceptAll( asmStmt->get_input(), *visitor );
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| 305 | acceptAll( asmStmt->get_output(), *visitor );
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[7f5566b] | 306 | }
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| 307 |
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[a4ca48c] | 308 | void Resolver::previsit( IfStmt *ifStmt ) {
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[08da53d] | 309 | findSingleExpression( ifStmt->condition, indexer );
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[a32b204] | 310 | }
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[51b73452] | 311 |
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[a4ca48c] | 312 | void Resolver::previsit( WhileStmt *whileStmt ) {
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[08da53d] | 313 | findSingleExpression( whileStmt->condition, indexer );
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[a32b204] | 314 | }
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[51b73452] | 315 |
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[a4ca48c] | 316 | void Resolver::previsit( ForStmt *forStmt ) {
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[08da53d] | 317 | if ( forStmt->condition ) {
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| 318 | findSingleExpression( forStmt->condition, indexer );
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[a32b204] | 319 | } // if
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[71f4e4f] | 320 |
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[08da53d] | 321 | if ( forStmt->increment ) {
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| 322 | findVoidExpression( forStmt->increment, indexer );
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[a32b204] | 323 | } // if
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| 324 | }
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[51b73452] | 325 |
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[a4ca48c] | 326 | void Resolver::previsit( SwitchStmt *switchStmt ) {
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| 327 | GuardValue( currentObject );
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[08da53d] | 328 | findIntegralExpression( switchStmt->condition, indexer );
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[71f4e4f] | 329 |
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[08da53d] | 330 | currentObject = CurrentObject( switchStmt->condition->result );
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[a32b204] | 331 | }
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[51b73452] | 332 |
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[a4ca48c] | 333 | void Resolver::previsit( CaseStmt *caseStmt ) {
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[32b8144] | 334 | if ( caseStmt->get_condition() ) {
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[e4d829b] | 335 | std::list< InitAlternative > initAlts = currentObject.getOptions();
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| 336 | assertf( initAlts.size() == 1, "SwitchStmt did not correctly resolve an integral expression." );
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[08da53d] | 337 | // must remove cast from case statement because RangeExpr cannot be cast.
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| 338 | Expression * newExpr = new CastExpr( caseStmt->condition, initAlts.front().type->clone() );
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| 339 | findSingleExpression( newExpr, indexer );
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| 340 | CastExpr * castExpr = strict_dynamic_cast< CastExpr * >( newExpr );
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| 341 | caseStmt->condition = castExpr->arg;
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| 342 | castExpr->arg = nullptr;
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[32b8144] | 343 | delete castExpr;
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| 344 | }
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[a32b204] | 345 | }
|
---|
[51b73452] | 346 |
|
---|
[a4ca48c] | 347 | void Resolver::previsit( BranchStmt *branchStmt ) {
|
---|
| 348 | visit_children = false;
|
---|
[de62360d] | 349 | // must resolve the argument for a computed goto
|
---|
| 350 | if ( branchStmt->get_type() == BranchStmt::Goto ) { // check for computed goto statement
|
---|
[08da53d] | 351 | if ( branchStmt->computedTarget ) {
|
---|
| 352 | // computed goto argument is void *
|
---|
| 353 | findSingleExpression( branchStmt->computedTarget, new PointerType( Type::Qualifiers(), new VoidType( Type::Qualifiers() ) ), indexer );
|
---|
[de62360d] | 354 | } // if
|
---|
| 355 | } // if
|
---|
| 356 | }
|
---|
| 357 |
|
---|
[a4ca48c] | 358 | void Resolver::previsit( ReturnStmt *returnStmt ) {
|
---|
| 359 | visit_children = false;
|
---|
[08da53d] | 360 | if ( returnStmt->expr ) {
|
---|
| 361 | findSingleExpression( returnStmt->expr, functionReturn->clone(), indexer );
|
---|
[a32b204] | 362 | } // if
|
---|
| 363 | }
|
---|
[51b73452] | 364 |
|
---|
[a4ca48c] | 365 | void Resolver::previsit( ThrowStmt *throwStmt ) {
|
---|
| 366 | visit_children = false;
|
---|
[cbce272] | 367 | // TODO: Replace *exception type with &exception type.
|
---|
[307a732] | 368 | if ( throwStmt->get_expr() ) {
|
---|
[cbce272] | 369 | StructDecl * exception_decl =
|
---|
[a4ca48c] | 370 | indexer.lookupStruct( "__cfaehm__base_exception_t" );
|
---|
[cbce272] | 371 | assert( exception_decl );
|
---|
[08da53d] | 372 | Type * exceptType = new PointerType( noQualifiers, new StructInstType( noQualifiers, exception_decl ) );
|
---|
| 373 | findSingleExpression( throwStmt->expr, exceptType, indexer );
|
---|
[307a732] | 374 | }
|
---|
| 375 | }
|
---|
| 376 |
|
---|
[a4ca48c] | 377 | void Resolver::previsit( CatchStmt *catchStmt ) {
|
---|
[08da53d] | 378 | if ( catchStmt->cond ) {
|
---|
| 379 | findSingleExpression( catchStmt->cond, new BasicType( noQualifiers, BasicType::Bool ), indexer );
|
---|
[cbce272] | 380 | }
|
---|
| 381 | }
|
---|
| 382 |
|
---|
[1dcd9554] | 383 | template< typename iterator_t >
|
---|
| 384 | inline bool advance_to_mutex( iterator_t & it, const iterator_t & end ) {
|
---|
| 385 | while( it != end && !(*it)->get_type()->get_mutex() ) {
|
---|
| 386 | it++;
|
---|
| 387 | }
|
---|
| 388 |
|
---|
| 389 | return it != end;
|
---|
| 390 | }
|
---|
| 391 |
|
---|
[695e00d] | 392 | void Resolver::previsit( WaitForStmt * stmt ) {
|
---|
[8f98b78] | 393 | visit_children = false;
|
---|
[1dcd9554] | 394 |
|
---|
| 395 | // Resolve all clauses first
|
---|
| 396 | for( auto& clause : stmt->clauses ) {
|
---|
| 397 |
|
---|
| 398 | TypeEnvironment env;
|
---|
[8f98b78] | 399 | AlternativeFinder funcFinder( indexer, env );
|
---|
[1dcd9554] | 400 |
|
---|
| 401 | // Find all alternatives for a function in canonical form
|
---|
| 402 | funcFinder.findWithAdjustment( clause.target.function );
|
---|
| 403 |
|
---|
| 404 | if ( funcFinder.get_alternatives().empty() ) {
|
---|
| 405 | stringstream ss;
|
---|
| 406 | ss << "Use of undeclared indentifier '";
|
---|
| 407 | ss << strict_dynamic_cast<NameExpr*>( clause.target.function )->name;
|
---|
| 408 | ss << "' in call to waitfor";
|
---|
| 409 | throw SemanticError( ss.str() );
|
---|
| 410 | }
|
---|
| 411 |
|
---|
| 412 | // Find all alternatives for all arguments in canonical form
|
---|
| 413 | std::list< AlternativeFinder > argAlternatives;
|
---|
| 414 | funcFinder.findSubExprs( clause.target.arguments.begin(), clause.target.arguments.end(), back_inserter( argAlternatives ) );
|
---|
| 415 |
|
---|
| 416 | // List all combinations of arguments
|
---|
| 417 | std::list< AltList > possibilities;
|
---|
| 418 | combos( argAlternatives.begin(), argAlternatives.end(), back_inserter( possibilities ) );
|
---|
| 419 |
|
---|
| 420 | AltList func_candidates;
|
---|
| 421 | std::vector< AltList > args_candidates;
|
---|
| 422 |
|
---|
| 423 | // For every possible function :
|
---|
| 424 | // try matching the arguments to the parameters
|
---|
| 425 | // not the other way around because we have more arguments than parameters
|
---|
| 426 | SemanticError errors;
|
---|
| 427 | for ( Alternative & func : funcFinder.get_alternatives() ) {
|
---|
| 428 | try {
|
---|
| 429 | PointerType * pointer = dynamic_cast< PointerType* >( func.expr->get_result()->stripReferences() );
|
---|
| 430 | if( !pointer ) {
|
---|
| 431 | throw SemanticError( "candidate not viable: not a pointer type\n", func.expr->get_result() );
|
---|
| 432 | }
|
---|
| 433 |
|
---|
| 434 | FunctionType * function = dynamic_cast< FunctionType* >( pointer->get_base() );
|
---|
| 435 | if( !function ) {
|
---|
| 436 | throw SemanticError( "candidate not viable: not a function type\n", pointer->get_base() );
|
---|
| 437 | }
|
---|
| 438 |
|
---|
| 439 |
|
---|
| 440 | {
|
---|
| 441 | auto param = function->parameters.begin();
|
---|
| 442 | auto param_end = function->parameters.end();
|
---|
| 443 |
|
---|
| 444 | if( !advance_to_mutex( param, param_end ) ) {
|
---|
| 445 | throw SemanticError("candidate function not viable: no mutex parameters\n", function);
|
---|
| 446 | }
|
---|
| 447 | }
|
---|
| 448 |
|
---|
| 449 | Alternative newFunc( func );
|
---|
| 450 | // Strip reference from function
|
---|
| 451 | referenceToRvalueConversion( newFunc.expr );
|
---|
| 452 |
|
---|
| 453 | // For all the set of arguments we have try to match it with the parameter of the current function alternative
|
---|
| 454 | for ( auto & argsList : possibilities ) {
|
---|
| 455 |
|
---|
| 456 | try {
|
---|
| 457 | // Declare data structures need for resolution
|
---|
| 458 | OpenVarSet openVars;
|
---|
| 459 | AssertionSet resultNeed, resultHave;
|
---|
| 460 | TypeEnvironment resultEnv;
|
---|
| 461 |
|
---|
| 462 | // Load type variables from arguemnts into one shared space
|
---|
| 463 | simpleCombineEnvironments( argsList.begin(), argsList.end(), resultEnv );
|
---|
| 464 |
|
---|
| 465 | // Make sure we don't widen any existing bindings
|
---|
| 466 | for ( auto & i : resultEnv ) {
|
---|
| 467 | i.allowWidening = false;
|
---|
| 468 | }
|
---|
| 469 |
|
---|
| 470 | // Find any unbound type variables
|
---|
| 471 | resultEnv.extractOpenVars( openVars );
|
---|
| 472 |
|
---|
| 473 | auto param = function->parameters.begin();
|
---|
| 474 | auto param_end = function->parameters.end();
|
---|
| 475 |
|
---|
| 476 | // For every arguments of its set, check if it matches one of the parameter
|
---|
| 477 | // The order is important
|
---|
| 478 | for( auto & arg : argsList ) {
|
---|
| 479 |
|
---|
| 480 | // Ignore non-mutex arguments
|
---|
| 481 | if( !advance_to_mutex( param, param_end ) ) {
|
---|
| 482 | // We ran out of parameters but still have arguments
|
---|
| 483 | // this function doesn't match
|
---|
| 484 | throw SemanticError("candidate function not viable: too many mutex arguments\n", function);
|
---|
| 485 | }
|
---|
| 486 |
|
---|
| 487 | // Check if the argument matches the parameter type in the current scope
|
---|
[8f98b78] | 488 | if( ! unify( (*param)->get_type(), arg.expr->get_result(), resultEnv, resultNeed, resultHave, openVars, this->indexer ) ) {
|
---|
[1dcd9554] | 489 | // Type doesn't match
|
---|
| 490 | stringstream ss;
|
---|
| 491 | ss << "candidate function not viable: no known convertion from '";
|
---|
| 492 | arg.expr->get_result()->print( ss );
|
---|
| 493 | ss << "' to '";
|
---|
| 494 | (*param)->get_type()->print( ss );
|
---|
| 495 | ss << "'\n";
|
---|
| 496 | throw SemanticError(ss.str(), function);
|
---|
| 497 | }
|
---|
| 498 |
|
---|
| 499 | param++;
|
---|
| 500 | }
|
---|
| 501 |
|
---|
| 502 | // All arguments match !
|
---|
| 503 |
|
---|
| 504 | // Check if parameters are missing
|
---|
| 505 | if( advance_to_mutex( param, param_end ) ) {
|
---|
| 506 | // We ran out of arguments but still have parameters left
|
---|
| 507 | // this function doesn't match
|
---|
| 508 | throw SemanticError("candidate function not viable: too few mutex arguments\n", function);
|
---|
| 509 | }
|
---|
| 510 |
|
---|
| 511 | // All parameters match !
|
---|
| 512 |
|
---|
| 513 | // Finish the expressions to tie in the proper environments
|
---|
| 514 | finishExpr( newFunc.expr, resultEnv );
|
---|
| 515 | for( Alternative & alt : argsList ) {
|
---|
| 516 | finishExpr( alt.expr, resultEnv );
|
---|
| 517 | }
|
---|
| 518 |
|
---|
| 519 | // This is a match store it and save it for later
|
---|
| 520 | func_candidates.push_back( newFunc );
|
---|
| 521 | args_candidates.push_back( argsList );
|
---|
| 522 |
|
---|
| 523 | }
|
---|
| 524 | catch( SemanticError &e ) {
|
---|
| 525 | errors.append( e );
|
---|
| 526 | }
|
---|
| 527 | }
|
---|
| 528 | }
|
---|
| 529 | catch( SemanticError &e ) {
|
---|
| 530 | errors.append( e );
|
---|
| 531 | }
|
---|
| 532 | }
|
---|
| 533 |
|
---|
| 534 | // Make sure we got the right number of arguments
|
---|
| 535 | if( func_candidates.empty() ) { SemanticError top( "No alternatives for function in call to waitfor" ); top.append( errors ); throw top; }
|
---|
| 536 | if( args_candidates.empty() ) { SemanticError top( "No alternatives for arguments in call to waitfor" ); top.append( errors ); throw top; }
|
---|
| 537 | if( func_candidates.size() > 1 ) { SemanticError top( "Ambiguous function in call to waitfor" ); top.append( errors ); throw top; }
|
---|
| 538 | if( args_candidates.size() > 1 ) { SemanticError top( "Ambiguous arguments in call to waitfor" ); top.append( errors ); throw top; }
|
---|
| 539 |
|
---|
| 540 |
|
---|
| 541 | // Swap the results from the alternative with the unresolved values.
|
---|
| 542 | // Alternatives will handle deletion on destruction
|
---|
| 543 | std::swap( clause.target.function, func_candidates.front().expr );
|
---|
| 544 | for( auto arg_pair : group_iterate( clause.target.arguments, args_candidates.front() ) ) {
|
---|
| 545 | std::swap ( std::get<0>( arg_pair), std::get<1>( arg_pair).expr );
|
---|
| 546 | }
|
---|
| 547 |
|
---|
| 548 | // Resolve the conditions as if it were an IfStmt
|
---|
| 549 | // Resolve the statments normally
|
---|
[08da53d] | 550 | findSingleExpression( clause.condition, this->indexer );
|
---|
[8f98b78] | 551 | clause.statement->accept( *visitor );
|
---|
[1dcd9554] | 552 | }
|
---|
| 553 |
|
---|
| 554 |
|
---|
| 555 | if( stmt->timeout.statement ) {
|
---|
| 556 | // Resolve the timeout as an size_t for now
|
---|
| 557 | // Resolve the conditions as if it were an IfStmt
|
---|
| 558 | // Resolve the statments normally
|
---|
[08da53d] | 559 | findSingleExpression( stmt->timeout.time, new BasicType( noQualifiers, BasicType::LongLongUnsignedInt ), this->indexer );
|
---|
| 560 | findSingleExpression( stmt->timeout.condition, this->indexer );
|
---|
[8f98b78] | 561 | stmt->timeout.statement->accept( *visitor );
|
---|
[1dcd9554] | 562 | }
|
---|
| 563 |
|
---|
| 564 | if( stmt->orelse.statement ) {
|
---|
| 565 | // Resolve the conditions as if it were an IfStmt
|
---|
| 566 | // Resolve the statments normally
|
---|
[08da53d] | 567 | findSingleExpression( stmt->orelse.condition, this->indexer );
|
---|
[8f98b78] | 568 | stmt->orelse.statement->accept( *visitor );
|
---|
[1dcd9554] | 569 | }
|
---|
| 570 | }
|
---|
| 571 |
|
---|
[b5c5684] | 572 | template< typename T >
|
---|
| 573 | bool isCharType( T t ) {
|
---|
| 574 | if ( BasicType * bt = dynamic_cast< BasicType * >( t ) ) {
|
---|
[71f4e4f] | 575 | return bt->get_kind() == BasicType::Char || bt->get_kind() == BasicType::SignedChar ||
|
---|
[b5c5684] | 576 | bt->get_kind() == BasicType::UnsignedChar;
|
---|
| 577 | }
|
---|
| 578 | return false;
|
---|
| 579 | }
|
---|
| 580 |
|
---|
[a4ca48c] | 581 | void Resolver::previsit( SingleInit *singleInit ) {
|
---|
| 582 | visit_children = false;
|
---|
[62423350] | 583 | // resolve initialization using the possibilities as determined by the currentObject cursor
|
---|
[0a22cda] | 584 | Expression * newExpr = new UntypedInitExpr( singleInit->value, currentObject.getOptions() );
|
---|
[08da53d] | 585 | findSingleExpression( newExpr, indexer );
|
---|
[e3e16bc] | 586 | InitExpr * initExpr = strict_dynamic_cast< InitExpr * >( newExpr );
|
---|
[62423350] | 587 |
|
---|
| 588 | // move cursor to the object that is actually initialized
|
---|
[e4d829b] | 589 | currentObject.setNext( initExpr->get_designation() );
|
---|
[62423350] | 590 |
|
---|
| 591 | // discard InitExpr wrapper and retain relevant pieces
|
---|
[08da53d] | 592 | newExpr = initExpr->expr;
|
---|
| 593 | initExpr->expr = nullptr;
|
---|
| 594 | std::swap( initExpr->env, newExpr->env );
|
---|
[bb666f64] | 595 | std::swap( initExpr->inferParams, newExpr->inferParams ) ;
|
---|
[e4d829b] | 596 | delete initExpr;
|
---|
| 597 |
|
---|
[62423350] | 598 | // get the actual object's type (may not exactly match what comes back from the resolver due to conversions)
|
---|
| 599 | Type * initContext = currentObject.getCurrentType();
|
---|
| 600 |
|
---|
[0a22cda] | 601 | removeExtraneousCast( newExpr, indexer );
|
---|
| 602 |
|
---|
[62423350] | 603 | // check if actual object's type is char[]
|
---|
| 604 | if ( ArrayType * at = dynamic_cast< ArrayType * >( initContext ) ) {
|
---|
| 605 | if ( isCharType( at->get_base() ) ) {
|
---|
| 606 | // check if the resolved type is char *
|
---|
| 607 | if ( PointerType * pt = dynamic_cast< PointerType *>( newExpr->get_result() ) ) {
|
---|
| 608 | if ( isCharType( pt->get_base() ) ) {
|
---|
[0a22cda] | 609 | if ( CastExpr *ce = dynamic_cast< CastExpr * >( newExpr ) ) {
|
---|
| 610 | // strip cast if we're initializing a char[] with a char *, e.g. char x[] = "hello";
|
---|
| 611 | newExpr = ce->get_arg();
|
---|
| 612 | ce->set_arg( nullptr );
|
---|
| 613 | std::swap( ce->env, newExpr->env );
|
---|
| 614 | delete ce;
|
---|
| 615 | }
|
---|
[62423350] | 616 | }
|
---|
| 617 | }
|
---|
| 618 | }
|
---|
| 619 | }
|
---|
[94b4364] | 620 |
|
---|
[62423350] | 621 | // set initializer expr to resolved express
|
---|
[0a22cda] | 622 | singleInit->value = newExpr;
|
---|
[62423350] | 623 |
|
---|
| 624 | // move cursor to next object in preparation for next initializer
|
---|
| 625 | currentObject.increment();
|
---|
| 626 | }
|
---|
[94b4364] | 627 |
|
---|
[a4ca48c] | 628 | void Resolver::previsit( ListInit * listInit ) {
|
---|
| 629 | visit_children = false;
|
---|
[62423350] | 630 | // move cursor into brace-enclosed initializer-list
|
---|
[e4d829b] | 631 | currentObject.enterListInit();
|
---|
| 632 | // xxx - fix this so that the list isn't copied, iterator should be used to change current element
|
---|
| 633 | std::list<Designation *> newDesignations;
|
---|
| 634 | for ( auto p : group_iterate(listInit->get_designations(), listInit->get_initializers()) ) {
|
---|
[62423350] | 635 | // iterate designations and initializers in pairs, moving the cursor to the current designated object and resolving
|
---|
| 636 | // the initializer against that object.
|
---|
[e4d829b] | 637 | Designation * des = std::get<0>(p);
|
---|
| 638 | Initializer * init = std::get<1>(p);
|
---|
| 639 | newDesignations.push_back( currentObject.findNext( des ) );
|
---|
[a4ca48c] | 640 | init->accept( *visitor );
|
---|
[b5c5684] | 641 | }
|
---|
[62423350] | 642 | // set the set of 'resolved' designations and leave the brace-enclosed initializer-list
|
---|
[e4d829b] | 643 | listInit->get_designations() = newDesignations; // xxx - memory management
|
---|
| 644 | currentObject.exitListInit();
|
---|
| 645 |
|
---|
[62423350] | 646 | // xxx - this part has not be folded into CurrentObject yet
|
---|
[e4d829b] | 647 | // } else if ( TypeInstType * tt = dynamic_cast< TypeInstType * >( initContext ) ) {
|
---|
| 648 | // Type * base = tt->get_baseType()->get_base();
|
---|
| 649 | // if ( base ) {
|
---|
| 650 | // // know the implementation type, so try using that as the initContext
|
---|
| 651 | // ObjectDecl tmpObj( "", Type::StorageClasses(), LinkageSpec::Cforall, nullptr, base->clone(), nullptr );
|
---|
| 652 | // currentObject = &tmpObj;
|
---|
| 653 | // visit( listInit );
|
---|
| 654 | // } else {
|
---|
| 655 | // // missing implementation type -- might be an unknown type variable, so try proceeding with the current init context
|
---|
| 656 | // Parent::visit( listInit );
|
---|
| 657 | // }
|
---|
| 658 | // } else {
|
---|
[a32b204] | 659 | }
|
---|
[71f4e4f] | 660 |
|
---|
[f1e012b] | 661 | // ConstructorInit - fall back on C-style initializer
|
---|
| 662 | void Resolver::fallbackInit( ConstructorInit * ctorInit ) {
|
---|
| 663 | // could not find valid constructor, or found an intrinsic constructor
|
---|
| 664 | // fall back on C-style initializer
|
---|
| 665 | delete ctorInit->get_ctor();
|
---|
| 666 | ctorInit->set_ctor( NULL );
|
---|
[71a145de] | 667 | delete ctorInit->get_dtor();
|
---|
| 668 | ctorInit->set_dtor( NULL );
|
---|
[a4ca48c] | 669 | maybeAccept( ctorInit->get_init(), *visitor );
|
---|
[f1e012b] | 670 | }
|
---|
| 671 |
|
---|
[1d2b64f] | 672 | // needs to be callable from outside the resolver, so this is a standalone function
|
---|
| 673 | void resolveCtorInit( ConstructorInit * ctorInit, const SymTab::Indexer & indexer ) {
|
---|
| 674 | assert( ctorInit );
|
---|
[a4ca48c] | 675 | PassVisitor<Resolver> resolver( indexer );
|
---|
[1d2b64f] | 676 | ctorInit->accept( resolver );
|
---|
| 677 | }
|
---|
| 678 |
|
---|
| 679 | void resolveStmtExpr( StmtExpr * stmtExpr, const SymTab::Indexer & indexer ) {
|
---|
| 680 | assert( stmtExpr );
|
---|
[a4ca48c] | 681 | PassVisitor<Resolver> resolver( indexer );
|
---|
[1d2b64f] | 682 | stmtExpr->accept( resolver );
|
---|
| 683 | }
|
---|
| 684 |
|
---|
[a4ca48c] | 685 | void Resolver::previsit( ConstructorInit *ctorInit ) {
|
---|
| 686 | visit_children = false;
|
---|
[1ba88a0] | 687 | // xxx - fallback init has been removed => remove fallbackInit function and remove complexity from FixInit and remove C-init from ConstructorInit
|
---|
[a4ca48c] | 688 | maybeAccept( ctorInit->get_ctor(), *visitor );
|
---|
| 689 | maybeAccept( ctorInit->get_dtor(), *visitor );
|
---|
[071a31a] | 690 |
|
---|
[5b2f5bb] | 691 | // found a constructor - can get rid of C-style initializer
|
---|
| 692 | delete ctorInit->get_init();
|
---|
| 693 | ctorInit->set_init( NULL );
|
---|
[ec79847] | 694 |
|
---|
| 695 | // intrinsic single parameter constructors and destructors do nothing. Since this was
|
---|
| 696 | // implicitly generated, there's no way for it to have side effects, so get rid of it
|
---|
| 697 | // to clean up generated code.
|
---|
[f9cebb5] | 698 | if ( InitTweak::isIntrinsicSingleArgCallStmt( ctorInit->get_ctor() ) ) {
|
---|
[ec79847] | 699 | delete ctorInit->get_ctor();
|
---|
| 700 | ctorInit->set_ctor( NULL );
|
---|
| 701 | }
|
---|
[f9cebb5] | 702 |
|
---|
| 703 | if ( InitTweak::isIntrinsicSingleArgCallStmt( ctorInit->get_dtor() ) ) {
|
---|
[ec79847] | 704 | delete ctorInit->get_dtor();
|
---|
| 705 | ctorInit->set_dtor( NULL );
|
---|
| 706 | }
|
---|
[a465caff] | 707 |
|
---|
| 708 | // xxx - todo -- what about arrays?
|
---|
| 709 | // if ( dtor == NULL && InitTweak::isIntrinsicCallStmt( ctorInit->get_ctor() ) ) {
|
---|
| 710 | // // can reduce the constructor down to a SingleInit using the
|
---|
| 711 | // // second argument from the ctor call, since
|
---|
| 712 | // delete ctorInit->get_ctor();
|
---|
| 713 | // ctorInit->set_ctor( NULL );
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| 714 |
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| 715 | // Expression * arg =
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| 716 | // ctorInit->set_init( new SingleInit( arg ) );
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| 717 | // }
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[71f4e4f] | 718 | }
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[51b73452] | 719 | } // namespace ResolvExpr
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[a32b204] | 720 |
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| 721 | // Local Variables: //
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| 722 | // tab-width: 4 //
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| 723 | // mode: c++ //
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| 724 | // compile-command: "make install" //
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| 725 | // End: //
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