Changeset 186fd86


Ignore:
Timestamp:
Nov 17, 2016, 4:22:24 PM (8 years ago)
Author:
Rob Schluntz <rschlunt@…>
Branches:
ADT, aaron-thesis, arm-eh, ast-experimental, cleanup-dtors, deferred_resn, demangler, enum, forall-pointer-decay, jacob/cs343-translation, jenkins-sandbox, master, new-ast, new-ast-unique-expr, new-env, no_list, persistent-indexer, pthread-emulation, qualifiedEnum, resolv-new, with_gc
Children:
2c57025
Parents:
d9fa60a
Message:

major refactoring of autogen code

Location:
src
Files:
3 edited

Legend:

Unmodified
Added
Removed

  • src/SymTab/Autogen.cc

    rd9fa60a r186fd86  
    3232                std::list< Declaration * > &get_declsToAdd() { return declsToAdd; }
    3333
     34                typedef Visitor Parent;
     35                using Parent::visit;
     36
    3437                virtual void visit( EnumDecl *enumDecl );
    3538                virtual void visit( StructDecl *structDecl );
    … …  
    6366        }
    6467
    65         template< typename OutputIterator >
    66         void makeUnionFieldsAssignment( ObjectDecl *srcParam, ObjectDecl *dstParam, OutputIterator out ) {
    67                 UntypedExpr *copy = new UntypedExpr( new NameExpr( "__builtin_memcpy" ) );
    68                 copy->get_args().push_back( new VariableExpr( dstParam ) );
    69                 copy->get_args().push_back( new AddressExpr( new VariableExpr( srcParam ) ) );
    70                 copy->get_args().push_back( new SizeofExpr( srcParam->get_type()->clone() ) );
    71 
    72                 *out++ = new ExprStmt( noLabels, copy );
    73         }
    74 
    75         //E ?=?(E volatile*, int),
    76         //  ?=?(E _Atomic volatile*, int);
    77         void makeEnumFunctions( EnumDecl *enumDecl, EnumInstType *refType, unsigned int functionNesting, std::list< Declaration * > &declsToAdd ) {
    78                 FunctionType *assignType = new FunctionType( Type::Qualifiers(), false );
    79 
    80                 ObjectDecl *dstParam = new ObjectDecl( "_dst", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), refType ), 0 );
    81                 assignType->get_parameters().push_back( dstParam );
    82 
    83                 // void ?{}(E *); void ^?{}(E *);
    84                 FunctionType * ctorType = assignType->clone();
    85                 FunctionType * dtorType = assignType->clone();
    86 
    87                 ObjectDecl *srcParam = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, refType->clone(), 0 );
    88                 assignType->get_parameters().push_back( srcParam );
    89                 // void ?{}(E *, E);
    90                 FunctionType *copyCtorType = assignType->clone();
    91 
    92                 // T ?=?(E *, E);
    93                 ObjectDecl *returnVal = new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, refType->clone(), 0 );
    94                 assignType->get_returnVals().push_back( returnVal );
    95 
    96                 // xxx - should we also generate void ?{}(E *, int) and E ?{}(E *, E)?
    97                 // right now these cases work, but that might change.
    98 
    99                 // Routines at global scope marked "static" to prevent multiple definitions is separate translation units
     68        /// inserts a forward declaration for functionDecl into declsToAdd
     69        void addForwardDecl( FunctionDecl * functionDecl, std::list< Declaration * > & declsToAdd ) {
     70                FunctionDecl * decl = functionDecl->clone();
     71                delete decl->get_statements();
     72                decl->set_statements( NULL );
     73                declsToAdd.push_back( decl );
     74                decl->fixUniqueId();
     75        }
     76
     77        /// given type T, generate type of default ctor/dtor, i.e. function type void (*) (T *)
     78        FunctionType * genDefaultType( Type * paramType ) {
     79                FunctionType *ftype = new FunctionType( Type::Qualifiers(), false );
     80                ObjectDecl *dstParam = new ObjectDecl( "_dst", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, nullptr, new PointerType( Type::Qualifiers(), paramType->clone() ), nullptr );
     81                ftype->get_parameters().push_back( dstParam );
     82
     83                return ftype;
     84        }
     85
     86        /// given type T, generate type of copy ctor, i.e. function type void (*) (T *, T)
     87        FunctionType * genCopyType( Type * paramType ) {
     88                FunctionType *ftype = genDefaultType( paramType );
     89                ObjectDecl *srcParam = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, nullptr, paramType->clone(), nullptr );
     90                ftype->get_parameters().push_back( srcParam );
     91                return ftype;
     92        }
     93
     94        /// given type T, generate type of assignment, i.e. function type T (*) (T *, T)
     95        FunctionType * genAssignType( Type * paramType, const std::list< Expression* > & params = std::list< Expression* >() ) {
     96                FunctionType *ftype = genCopyType( paramType );
     97                ObjectDecl *returnVal = new ObjectDecl( "_ret", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, nullptr, paramType->clone(), nullptr );
     98                ftype->get_returnVals().push_back( returnVal );
     99                return ftype;
     100        }
     101
     102        /// true if the aggregate's layout is dynamic
     103        template< typename AggrDecl >
     104        bool hasDynamicLayout( AggrDecl * aggregateDecl ) {
     105                for ( TypeDecl * param : aggregateDecl->get_parameters() ) {
     106                        if ( param->get_kind() == TypeDecl::Any ) return true;
     107                }
     108                return false;
     109        }
     110
     111        /// generate a function decl from a name and type. Nesting depth determines whether
     112        /// the declaration is static or not; optional paramter determines if declaration is intrinsic
     113        FunctionDecl * genFunc( const std::string & fname, FunctionType * ftype, unsigned int functionNesting, bool isIntrinsic = false  ) {
     114                // Routines at global scope marked "static" to prevent multiple definitions in separate translation units
    100115                // because each unit generates copies of the default routines for each aggregate.
    101                 // xxx - Temporary: make these functions intrinsic so they codegen as C assignment.
    102                 // Really they're something of a cross between instrinsic and autogen, so should
    103                 // probably make a new linkage type
    104                 FunctionDecl *assignDecl = new FunctionDecl( "?=?", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::Intrinsic, assignType, new CompoundStmt( noLabels ), true, false );
    105                 FunctionDecl *ctorDecl = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::Intrinsic, ctorType, new CompoundStmt( noLabels ), true, false );
    106                 FunctionDecl *copyCtorDecl = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::Intrinsic, copyCtorType, new CompoundStmt( noLabels ), true, false );
    107                 FunctionDecl *dtorDecl = new FunctionDecl( "^?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::Intrinsic, dtorType, new CompoundStmt( noLabels ), true, false );
    108                 assignDecl->fixUniqueId();
    109                 ctorDecl->fixUniqueId();
    110                 copyCtorDecl->fixUniqueId();
    111                 dtorDecl->fixUniqueId();
    112 
     116                DeclarationNode::StorageClass sc = functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static;
     117                LinkageSpec::Spec spec = isIntrinsic ? LinkageSpec::Intrinsic : LinkageSpec::AutoGen;
     118                FunctionDecl * decl = new FunctionDecl( fname, sc, spec, ftype, new CompoundStmt( noLabels ), true, false );
     119                decl->fixUniqueId();
     120                return decl;
     121        }
     122
     123        /// generates a single enumeration assignment expression
     124        ApplicationExpr * genEnumAssign( FunctionType * ftype, FunctionDecl * assignDecl ) {
    113125                // enum copy construct and assignment is just C-style assignment.
    114126                // this looks like a bad recursive call, but code gen will turn it into
    115127                // a C-style assignment.
    116128                // This happens before function pointer type conversion, so need to do it manually here
     129                // NOTE: ftype is not necessarily the functionType belonging to assignDecl - ftype is the
     130                // type of the function that this expression is being generated for (so that the correct
     131                // parameters) are using in the variable exprs
     132                assert( ftype->get_parameters().size() == 2 );
     133                ObjectDecl * dstParam = safe_dynamic_cast< ObjectDecl * >( ftype->get_parameters().front() );
     134                ObjectDecl * srcParam = safe_dynamic_cast< ObjectDecl * >( ftype->get_parameters().back() );
     135
    117136                VariableExpr * assignVarExpr = new VariableExpr( assignDecl );
    118137                Type * assignVarExprType = assignVarExpr->get_result();
    … …  
    122141                assignExpr->get_args().push_back( new VariableExpr( dstParam ) );
    123142                assignExpr->get_args().push_back( new VariableExpr( srcParam ) );
     143                return assignExpr;
     144        }
     145
     146        // E ?=?(E volatile*, int),
     147        //   ?=?(E _Atomic volatile*, int);
     148        void makeEnumFunctions( EnumDecl *enumDecl, EnumInstType *refType, unsigned int functionNesting, std::list< Declaration * > &declsToAdd ) {
     149
     150                // T ?=?(E *, E);
     151                FunctionType *assignType = genAssignType( refType );
     152
     153                // void ?{}(E *); void ^?{}(E *);
     154                FunctionType * ctorType = genDefaultType( refType->clone() );
     155                FunctionType * dtorType = genDefaultType( refType->clone() );
     156
     157                // void ?{}(E *, E);
     158                FunctionType *copyCtorType = genCopyType( refType->clone() );
     159
     160                // xxx - should we also generate void ?{}(E *, int) and E ?{}(E *, E)?
     161                // right now these cases work, but that might change.
     162
     163                // xxx - Temporary: make these functions intrinsic so they codegen as C assignment.
     164                // Really they're something of a cross between instrinsic and autogen, so should
     165                // probably make a new linkage type
     166                FunctionDecl *assignDecl = genFunc( "?=?", assignType, functionNesting, true );
     167                FunctionDecl *ctorDecl = genFunc( "?{}", ctorType, functionNesting, true );
     168                FunctionDecl *copyCtorDecl = genFunc( "?{}", copyCtorType, functionNesting, true );
     169                FunctionDecl *dtorDecl = genFunc( "^?{}", dtorType, functionNesting, true );
    124170
    125171                // body is either return stmt or expr stmt
    126                 assignDecl->get_statements()->get_kids().push_back( new ReturnStmt( noLabels, assignExpr ) );
    127                 copyCtorDecl->get_statements()->get_kids().push_back( new ExprStmt( noLabels, assignExpr->clone() ) );
     172                assignDecl->get_statements()->get_kids().push_back( new ReturnStmt( noLabels, genEnumAssign( assignType, assignDecl ) ) );
     173                copyCtorDecl->get_statements()->get_kids().push_back( new ExprStmt( noLabels, genEnumAssign( copyCtorType, assignDecl ) ) );
    128174
    129175                declsToAdd.push_back( assignDecl );
    … …  
    133179        }
    134180
    135         /// Clones a reference type, replacing any parameters it may have with a clone of the provided list
    136         template< typename GenericInstType >
    137         GenericInstType *cloneWithParams( GenericInstType *refType, const std::list< Expression* >& params ) {
    138                 GenericInstType *clone = refType->clone();
    139                 clone->get_parameters().clear();
    140                 cloneAll( params, clone->get_parameters() );
    141                 return clone;
    142         }
    143 
    144         /// Creates a new type decl that's the same as src, but renamed and with only the ?=?, ?{} (default and copy), and ^?{} assertions (for complete types only)
    145         TypeDecl *cloneAndRename( TypeDecl *src, const std::string &name ) {
    146                 // TypeDecl *dst = new TypeDecl( name, src->get_storageClass(), 0, src->get_kind() );
    147 
    148                 // if ( src->get_kind() == TypeDecl::Any ) {
    149                 //      TypeInstType *opParamType = new TypeInstType( Type::Qualifiers(), name, dst );
    150                 //      FunctionType *opFunctionType = new FunctionType( Type::Qualifiers(), false );
    151                 //      opFunctionType->get_parameters().push_back(
    152                 //              new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), opParamType->clone() ), 0 ) );
    153                 //      FunctionDecl *ctorAssert = new FunctionDecl( "?{}", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, opFunctionType->clone(), 0, false, false );
    154                 //      FunctionDecl *dtorAssert = new FunctionDecl( "^?{}", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, opFunctionType->clone(), 0, false, false );
    155 
    156                 //      opFunctionType->get_parameters().push_back(
    157                 //              new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, opParamType, 0 ) );
    158                 //      FunctionDecl *copyCtorAssert = new FunctionDecl( "?{}", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, opFunctionType->clone(), 0, false, false );
    159 
    160                 //      opFunctionType->get_returnVals().push_back(
    161                 //              new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, opParamType->clone(), 0 ) );
    162                 //      FunctionDecl *assignAssert = new FunctionDecl( "?=?", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, opFunctionType, 0, false, false );
    163 
    164 
    165                 //      dst->get_assertions().push_back( assignAssert );
    166                 //      dst->get_assertions().push_back( ctorAssert );
    167                 //      dst->get_assertions().push_back( dtorAssert );
    168                 //      dst->get_assertions().push_back( copyCtorAssert );
    169                 // }
    170 
    171                 TypeDecl *dst = new TypeDecl( src->get_name(), src->get_storageClass(), 0, src->get_kind() );
    172                 cloneAll(src->get_assertions(), dst->get_assertions());
    173                 return dst;
    174         }
    175 
    176         void makeStructMemberOp( ObjectDecl * dstParam, Expression * src, DeclarationWithType * field, FunctionDecl * func, TypeSubstitution & genericSubs, bool isDynamicLayout, bool forward = true ) {
     181        /// generates a single struct member operation (constructor call, destructor call, assignment call)
     182        void makeStructMemberOp( ObjectDecl * dstParam, Expression * src, DeclarationWithType * field, FunctionDecl * func, bool isDynamicLayout, bool forward = true ) {
    177183                ObjectDecl * returnVal = NULL;
    178184                if ( ! func->get_functionType()->get_returnVals().empty() ) {
    … …  
    194200        }
    195201
     202        /// generates the body of a struct function by iterating the struct members (via parameters) - generates default ctor, copy ctor, assignment, and dtor bodies, but NOT field ctor bodies
    196203        template<typename Iterator>
    197         void makeStructFunctionBody( Iterator member, Iterator end, FunctionDecl * func, TypeSubstitution & genericSubs, bool isDynamicLayout, bool forward = true ) {
     204        void makeStructFunctionBody( Iterator member, Iterator end, FunctionDecl * func, bool isDynamicLayout, bool forward = true ) {
    198205                for ( ; member != end; ++member ) {
    199206                        if ( DeclarationWithType *field = dynamic_cast< DeclarationWithType * >( *member ) ) { // otherwise some form of type declaration, e.g. Aggregate
    … …  
    231238
    232239                                Expression *srcselect = srcParam ? new MemberExpr( field, new VariableExpr( srcParam ) ) : NULL;
    233                                 makeStructMemberOp( dstParam, srcselect, field, func, genericSubs, isDynamicLayout, forward );
     240                                makeStructMemberOp( dstParam, srcselect, field, func, isDynamicLayout, forward );
    234241                        } // if
    235242                } // for
    … …  
    239246        /// void ?{}(A *, int) and void?{}(A *, int, int) for a struct A which has two int fields.
    240247        template<typename Iterator>
    241         void makeStructFieldCtorBody( Iterator member, Iterator end, FunctionDecl * func, TypeSubstitution & genericSubs, bool isDynamicLayout ) {
     248        void makeStructFieldCtorBody( Iterator member, Iterator end, FunctionDecl * func, bool isDynamicLayout ) {
    242249                FunctionType * ftype = func->get_functionType();
    243250                std::list<DeclarationWithType*> & params = ftype->get_parameters();
    … …  
    265272                                        // matching parameter, initialize field with copy ctor
    266273                                        Expression *srcselect = new VariableExpr(*parameter);
    267                                         makeStructMemberOp( dstParam, srcselect, field, func, genericSubs, isDynamicLayout );
     274                                        makeStructMemberOp( dstParam, srcselect, field, func, isDynamicLayout );
    268275                                        ++parameter;
    269276                                } else {
    270277                                        // no matching parameter, initialize field with default ctor
    271                                         makeStructMemberOp( dstParam, NULL, field, func, genericSubs, isDynamicLayout );
     278                                        makeStructMemberOp( dstParam, NULL, field, func, isDynamicLayout );
    272279                                }
    273280                        }
    … …  
    275282        }
    276283
    277         void addForwardDecl( FunctionDecl * functionDecl, std::list< Declaration * > & declsToAdd ) {
    278                 FunctionDecl * decl = functionDecl->clone();
    279                 delete decl->get_statements();
    280                 decl->set_statements( NULL );
    281                 declsToAdd.push_back( decl );
    282                 decl->fixUniqueId();
    283         }
    284 
     284        /// generates struct constructors, destructor, and assignment functions
    285285        void makeStructFunctions( StructDecl *aggregateDecl, StructInstType *refType, unsigned int functionNesting, std::list< Declaration * > & declsToAdd ) {
    286                 FunctionType *assignType = new FunctionType( Type::Qualifiers(), false );
    287286
    288287                // Make function polymorphic in same parameters as generic struct, if applicable
    289                 bool isDynamicLayout = false;  // NOTE this flag is an incredibly ugly kludge; we should fix the assignment signature instead (ditto for union)
    290                 std::list< TypeDecl* >& genericParams = aggregateDecl->get_parameters();
    291                 std::list< Expression* > structParams;  // List of matching parameters to put on types
    292                 TypeSubstitution genericSubs; // Substitutions to make to member types of struct
    293                 for ( std::list< TypeDecl* >::const_iterator param = genericParams.begin(); param != genericParams.end(); ++param ) {
    294                         if ( (*param)->get_kind() == TypeDecl::Any ) isDynamicLayout = true;
    295                         TypeDecl *typeParam = cloneAndRename( *param, "_autoassign_" + aggregateDecl->get_name() + "_" + (*param)->get_name() );
    296                         assignType->get_forall().push_back( typeParam );
    297                         TypeInstType *newParamType = new TypeInstType( Type::Qualifiers(), typeParam->get_name(), typeParam );
    298                         genericSubs.add( (*param)->get_name(), newParamType );
    299                         structParams.push_back( new TypeExpr( newParamType ) );
    300                 }
    301 
    302                 ObjectDecl *dstParam = new ObjectDecl( "_dst", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), cloneWithParams( refType, structParams ) ), 0 );
    303                 assignType->get_parameters().push_back( dstParam );
     288                const std::list< TypeDecl* > & typeParams = aggregateDecl->get_parameters(); // List of type variables to be placed on the generated functions
     289                bool isDynamicLayout = hasDynamicLayout( aggregateDecl );  // NOTE this flag is an incredibly ugly kludge; we should fix the assignment signature instead (ditto for union)
     290
     291                // T ?=?(T *, T);
     292                FunctionType *assignType = genAssignType( refType );
     293                cloneAll( typeParams, assignType->get_forall() );
    304294
    305295                // void ?{}(T *); void ^?{}(T *);
    306                 FunctionType *ctorType = assignType->clone();
    307                 FunctionType *dtorType = assignType->clone();
    308 
    309                 ObjectDecl *srcParam = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, cloneWithParams( refType, structParams ), 0 );
    310                 assignType->get_parameters().push_back( srcParam );
     296                FunctionType *ctorType = genDefaultType( refType );
     297                cloneAll( typeParams, ctorType->get_forall() );
     298                FunctionType *dtorType = genDefaultType( refType );
     299                cloneAll( typeParams, dtorType->get_forall() );
    311300
    312301                // void ?{}(T *, T);
    313                 FunctionType *copyCtorType = assignType->clone();
    314 
    315                 // T ?=?(T *, T);
    316                 ObjectDecl *returnVal = new ObjectDecl( "_ret", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, cloneWithParams( refType, structParams ), 0 );
    317                 assignType->get_returnVals().push_back( returnVal );
    318 
    319                 // Routines at global scope marked "static" to prevent multiple definitions is separate translation units
    320                 // because each unit generates copies of the default routines for each aggregate.
    321                 FunctionDecl *assignDecl = new FunctionDecl( "?=?", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, assignType, new CompoundStmt( noLabels ), true, false );
    322                 FunctionDecl *ctorDecl = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, ctorType, new CompoundStmt( noLabels ), true, false );
    323                 FunctionDecl *copyCtorDecl = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, copyCtorType, new CompoundStmt( noLabels ), true, false );
    324                 FunctionDecl *dtorDecl = new FunctionDecl( "^?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, dtorType, new CompoundStmt( noLabels ), true, false );
    325                 assignDecl->fixUniqueId();
    326                 ctorDecl->fixUniqueId();
    327                 copyCtorDecl->fixUniqueId();
    328                 dtorDecl->fixUniqueId();
     302                FunctionType *copyCtorType = genCopyType( refType );
     303                cloneAll( typeParams, copyCtorType->get_forall() );
     304
     305                FunctionDecl *assignDecl = genFunc( "?=?", assignType, functionNesting );
     306                FunctionDecl *ctorDecl = genFunc( "?{}", ctorType, functionNesting );
     307                FunctionDecl *copyCtorDecl = genFunc( "?{}", copyCtorType, functionNesting );
     308                FunctionDecl *dtorDecl = genFunc( "^?{}", dtorType, functionNesting );
    329309
    330310                if ( functionNesting == 0 ) {
    … …  
    359339                        }
    360340                        memCtorType->get_parameters().push_back( new ObjectDecl( member->get_name(), DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, member->get_type()->clone(), 0 ) );
    361                         FunctionDecl * ctor = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, memCtorType->clone(), new CompoundStmt( noLabels ), true, false );
    362                         ctor->fixUniqueId();
    363                         makeStructFieldCtorBody( aggregateDecl->get_members().begin(), aggregateDecl->get_members().end(), ctor, genericSubs, isDynamicLayout );
     341                        FunctionDecl * ctor = genFunc( "?{}", memCtorType->clone(), functionNesting );
     342                        makeStructFieldCtorBody( aggregateDecl->get_members().begin(), aggregateDecl->get_members().end(), ctor, isDynamicLayout );
    364343                        memCtors.push_back( ctor );
    365344                }
    … …  
    367346
    368347                // generate appropriate calls to member ctor, assignment
    369                 makeStructFunctionBody( aggregateDecl->get_members().begin(), aggregateDecl->get_members().end(), assignDecl, genericSubs, isDynamicLayout );
    370                 makeStructFunctionBody( aggregateDecl->get_members().begin(), aggregateDecl->get_members().end(), ctorDecl, genericSubs, isDynamicLayout );
    371                 makeStructFunctionBody( aggregateDecl->get_members().begin(), aggregateDecl->get_members().end(), copyCtorDecl, genericSubs, isDynamicLayout );
     348                makeStructFunctionBody( aggregateDecl->get_members().begin(), aggregateDecl->get_members().end(), assignDecl, isDynamicLayout );
     349                makeStructFunctionBody( aggregateDecl->get_members().begin(), aggregateDecl->get_members().end(), ctorDecl, isDynamicLayout );
     350                makeStructFunctionBody( aggregateDecl->get_members().begin(), aggregateDecl->get_members().end(), copyCtorDecl, isDynamicLayout );
    372351                // needs to do everything in reverse, so pass "forward" as false
    373                 makeStructFunctionBody( aggregateDecl->get_members().rbegin(), aggregateDecl->get_members().rend(), dtorDecl, genericSubs, isDynamicLayout, false );
    374 
    375                 if ( ! isDynamicLayout ) assignDecl->get_statements()->get_kids().push_back( new ReturnStmt( noLabels, new VariableExpr( srcParam ) ) );
     352                makeStructFunctionBody( aggregateDecl->get_members().rbegin(), aggregateDecl->get_members().rend(), dtorDecl, isDynamicLayout, false );
     353
     354                if ( ! isDynamicLayout ) {
     355                        assert( assignType->get_parameters().size() == 2 );
     356                        ObjectDecl * srcParam = safe_dynamic_cast< ObjectDecl * >( assignType->get_parameters().back() );
     357                        assignDecl->get_statements()->get_kids().push_back( new ReturnStmt( noLabels, new VariableExpr( srcParam ) ) );
     358                }
    376359
    377360                declsToAdd.push_back( assignDecl );
    … …  
    382365        }
    383366
     367        /// generate a single union assignment expression (using memcpy)
     368        template< typename OutputIterator >
     369        void makeUnionFieldsAssignment( ObjectDecl * srcParam, ObjectDecl * dstParam, OutputIterator out ) {
     370                UntypedExpr *copy = new UntypedExpr( new NameExpr( "__builtin_memcpy" ) );
     371                copy->get_args().push_back( new VariableExpr( dstParam ) );
     372                copy->get_args().push_back( new AddressExpr( new VariableExpr( srcParam ) ) );
     373                copy->get_args().push_back( new SizeofExpr( srcParam->get_type()->clone() ) );
     374                *out++ = new ExprStmt( noLabels, copy );
     375        }
     376
     377        /// generates the body of a union assignment/copy constructor/field constructor
     378        void makeUnionAssignBody( FunctionDecl * funcDecl, bool isDynamicLayout ) {
     379                FunctionType * ftype = funcDecl->get_functionType();
     380                assert( ftype->get_parameters().size() == 2 );
     381                ObjectDecl * dstParam = safe_dynamic_cast< ObjectDecl * >( ftype->get_parameters().front() );
     382                ObjectDecl * srcParam = safe_dynamic_cast< ObjectDecl * >( ftype->get_parameters().back() );
     383                ObjectDecl * returnVal = nullptr;
     384                if ( ! ftype->get_returnVals().empty() ) {
     385                        returnVal = safe_dynamic_cast< ObjectDecl * >( ftype->get_returnVals().front() );
     386                }
     387
     388                makeUnionFieldsAssignment( srcParam, dstParam, back_inserter( funcDecl->get_statements()->get_kids() ) );
     389                if ( returnVal ) {
     390                        if ( isDynamicLayout ) makeUnionFieldsAssignment( srcParam, returnVal, back_inserter( funcDecl->get_statements()->get_kids() ) );
     391                        else funcDecl->get_statements()->get_kids().push_back( new ReturnStmt( noLabels, new VariableExpr( srcParam ) ) );
     392                }
     393        }
     394
     395        /// generates union constructors, destructors, and assignment operator
    384396        void makeUnionFunctions( UnionDecl *aggregateDecl, UnionInstType *refType, unsigned int functionNesting, std::list< Declaration * > & declsToAdd ) {
    385                 FunctionType *assignType = new FunctionType( Type::Qualifiers(), false );
    386 
    387397                // Make function polymorphic in same parameters as generic union, if applicable
    388                 bool isDynamicLayout = false; // NOTE this flag is an incredibly ugly kludge; we should fix the assignment signature instead (ditto for struct)
    389                 std::list< TypeDecl* >& genericParams = aggregateDecl->get_parameters();
    390                 std::list< Expression* > unionParams;  // List of matching parameters to put on types
    391                 for ( std::list< TypeDecl* >::const_iterator param = genericParams.begin(); param != genericParams.end(); ++param ) {
    392                         if ( (*param)->get_kind() == TypeDecl::Any ) isDynamicLayout = true;
    393                         TypeDecl *typeParam = cloneAndRename( *param, "_autoassign_" + aggregateDecl->get_name() + "_" + (*param)->get_name() );
    394                         assignType->get_forall().push_back( typeParam );
    395                         unionParams.push_back( new TypeExpr( new TypeInstType( Type::Qualifiers(), typeParam->get_name(), typeParam ) ) );
    396                 }
    397 
    398                 ObjectDecl *dstParam = new ObjectDecl( "_dst", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), cloneWithParams( refType, unionParams ) ), 0 );
    399                 assignType->get_parameters().push_back( dstParam );
     398                const std::list< TypeDecl* > & typeParams = aggregateDecl->get_parameters(); // List of type variables to be placed on the generated functions
     399                bool isDynamicLayout = hasDynamicLayout( aggregateDecl );  // NOTE this flag is an incredibly ugly kludge; we should fix the assignment signature instead (ditto for struct)
    400400
    401401                // default ctor/dtor need only first parameter
    402                 FunctionType * ctorType = assignType->clone();
    403                 FunctionType * dtorType = assignType->clone();
    404 
    405                 ObjectDecl *srcParam = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, cloneWithParams( refType, unionParams ), 0 );
    406                 assignType->get_parameters().push_back( srcParam );
     402                // void ?{}(T *); void ^?{}(T *);
     403                FunctionType *ctorType = genDefaultType( refType );
     404                cloneAll( typeParams, ctorType->get_forall() );
     405                FunctionType *dtorType = genDefaultType( refType );
     406                cloneAll( typeParams, dtorType->get_forall() );
    407407
    408408                // copy ctor needs both parameters
    409                 FunctionType * copyCtorType = assignType->clone();
     409                // void ?{}(T *, T);
     410                FunctionType *copyCtorType = genCopyType( refType );
     411                cloneAll( typeParams, copyCtorType->get_forall() );
    410412
    411413                // assignment needs both and return value
    412                 ObjectDecl *returnVal = new ObjectDecl( "_ret", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, cloneWithParams( refType, unionParams ), 0 );
    413                 assignType->get_returnVals().push_back( returnVal );
     414                // T ?=?(T *, T);
     415                FunctionType *assignType = genAssignType( refType );
     416                cloneAll( typeParams, assignType->get_forall() );
    414417
    415418                // Routines at global scope marked "static" to prevent multiple definitions is separate translation units
    416419                // because each unit generates copies of the default routines for each aggregate.
    417                 FunctionDecl *assignDecl = new FunctionDecl( "?=?",  functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, assignType, new CompoundStmt( noLabels ), true, false );
    418                 FunctionDecl *ctorDecl = new FunctionDecl( "?{}",  functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, ctorType, new CompoundStmt( noLabels ), true, false );
    419                 FunctionDecl *copyCtorDecl = new FunctionDecl( "?{}",  functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, copyCtorType, NULL, true, false );
    420                 FunctionDecl *dtorDecl = new FunctionDecl( "^?{}",  functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, dtorType, new CompoundStmt( noLabels ), true, false );
    421 
    422                 assignDecl->fixUniqueId();
    423                 ctorDecl->fixUniqueId();
    424                 copyCtorDecl->fixUniqueId();
    425                 dtorDecl->fixUniqueId();
    426 
    427                 makeUnionFieldsAssignment( srcParam, dstParam, back_inserter( assignDecl->get_statements()->get_kids() ) );
    428                 if ( isDynamicLayout ) makeUnionFieldsAssignment( srcParam, returnVal, back_inserter( assignDecl->get_statements()->get_kids() ) );
    429                 else assignDecl->get_statements()->get_kids().push_back( new ReturnStmt( noLabels, new VariableExpr( srcParam ) ) );
     420                FunctionDecl *assignDecl = genFunc( "?=?", assignType, functionNesting );
     421                FunctionDecl *ctorDecl = genFunc( "?{}",  ctorType, functionNesting );
     422                FunctionDecl *copyCtorDecl = genFunc( "?{}", copyCtorType, functionNesting );
     423                FunctionDecl *dtorDecl = genFunc( "^?{}", dtorType, functionNesting );
     424
     425                makeUnionAssignBody( assignDecl, isDynamicLayout );
    430426
    431427                // body of assignment and copy ctor is the same
    432                 copyCtorDecl->set_statements( assignDecl->get_statements()->clone() );
     428                makeUnionAssignBody( copyCtorDecl, isDynamicLayout );
    433429
    434430                // create a constructor which takes the first member type as a parameter.
    … …  
    443439                                FunctionType * memCtorType = ctorType->clone();
    444440                                memCtorType->get_parameters().push_back( srcParam );
    445                                 FunctionDecl * ctor = new FunctionDecl( "?{}", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, memCtorType, new CompoundStmt( noLabels ), true, false );
    446                                 ctor->fixUniqueId();
    447 
    448                                 makeUnionFieldsAssignment( srcParam, dstParam, back_inserter( ctor->get_statements()->get_kids() ) );
     441                                FunctionDecl * ctor = genFunc( "?{}", memCtorType, functionNesting );
     442
     443                                makeUnionAssignBody( ctor, isDynamicLayout );
    449444                                memCtors.push_back( ctor );
    450445                                // only generate a ctor for the first field
    … …  
    472467                if ( ! structDecl->get_members().empty() && structsDone.find( structDecl->get_name() ) == structsDone.end() ) {
    473468                        StructInstType structInst( Type::Qualifiers(), structDecl->get_name() );
     469                        for ( TypeDecl * typeDecl : structDecl->get_parameters() ) {
     470                                structInst.get_parameters().push_back( new TypeExpr( new TypeInstType( Type::Qualifiers(), typeDecl->get_name(), typeDecl ) ) );
     471                        }
    474472                        structInst.set_baseStruct( structDecl );
    475473                        makeStructFunctions( structDecl, &structInst, functionNesting, declsToAdd );
    … …  
    482480                        UnionInstType unionInst( Type::Qualifiers(), unionDecl->get_name() );
    483481                        unionInst.set_baseUnion( unionDecl );
     482                        for ( TypeDecl * typeDecl : unionDecl->get_parameters() ) {
     483                                unionInst.get_parameters().push_back( new TypeExpr( new TypeInstType( Type::Qualifiers(), typeDecl->get_name(), typeDecl ) ) );
     484                        }
    484485                        makeUnionFunctions( unionDecl, &unionInst, functionNesting, declsToAdd );
    485486                } // if
    … …  
    487488
    488489        void AutogenerateRoutines::visit( TypeDecl *typeDecl ) {
    489                 CompoundStmt *stmts = 0;
    490490                TypeInstType *typeInst = new TypeInstType( Type::Qualifiers(), typeDecl->get_name(), false );
    491491                typeInst->set_baseType( typeDecl );
    492                 ObjectDecl *src = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, typeInst->clone(), 0 );
    493                 ObjectDecl *dst = new ObjectDecl( "_dst", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), typeInst->clone() ), 0 );
     492                ObjectDecl *src = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, nullptr, typeInst->clone(), nullptr );
     493                ObjectDecl *dst = new ObjectDecl( "_dst", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, nullptr, new PointerType( Type::Qualifiers(), typeInst->clone() ), nullptr );
     494
     495                std::list< Statement * > stmts;
    494496                if ( typeDecl->get_base() ) {
    495497                        // xxx - generate ctor/dtors for typedecls, e.g.
    496498                        // otype T = int *;
    497                         stmts = new CompoundStmt( std::list< Label >() );
    498499                        UntypedExpr *assign = new UntypedExpr( new NameExpr( "?=?" ) );
    499500                        assign->get_args().push_back( new CastExpr( new VariableExpr( dst ), new PointerType( Type::Qualifiers(), typeDecl->get_base()->clone() ) ) );
    500501                        assign->get_args().push_back( new CastExpr( new VariableExpr( src ), typeDecl->get_base()->clone() ) );
    501                         stmts->get_kids().push_back( new ReturnStmt( std::list< Label >(), assign ) );
     502                        stmts.push_back( new ReturnStmt( std::list< Label >(), assign ) );
    502503                } // if
    503504                FunctionType *type = new FunctionType( Type::Qualifiers(), false );
    … …  
    505506                type->get_parameters().push_back( dst );
    506507                type->get_parameters().push_back( src );
    507                 FunctionDecl *func = new FunctionDecl( "?=?", DeclarationNode::NoStorageClass, LinkageSpec::AutoGen, type, stmts, true, false );
     508                FunctionDecl *func = genFunc( "?=?", type, functionNesting );
     509                func->get_statements()->get_kids() = stmts;
    508510                declsToAdd.push_back( func );
    509511        }

  • src/tests/.expect/32/extension.txt

    rd9fa60a r186fd86  
    7070    ((void)((_tmp_cp_ret1=__builtin_memcpy(((void *)___dst__P2uU_1), ((const void *)(&___src__2uU_1)), sizeof(union U ))) , _tmp_cp_ret1));
    7171    ((void)(_tmp_cp_ret1) /* ^?{} */);
    72     return ((void)___src__2uU_1);
    7372}
    7473static inline void ___destructor__F_P2uU_autogen___1(union U *___dst__P2uU_1){

  • src/tests/.expect/64/extension.txt

    rd9fa60a r186fd86  
    7070    ((void)((_tmp_cp_ret1=__builtin_memcpy(((void *)___dst__P2uU_1), ((const void *)(&___src__2uU_1)), sizeof(union U ))) , _tmp_cp_ret1));
    7171    ((void)(_tmp_cp_ret1) /* ^?{} */);
    72     return ((void)___src__2uU_1);
    7372}
    7473static inline void ___destructor__F_P2uU_autogen___1(union U *___dst__P2uU_1){
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