source: src/SymTab/Autogen.cc@ 84733c1

ADT aaron-thesis arm-eh ast-experimental cleanup-dtors deferred_resn demangler enum forall-pointer-decay jacob/cs343-translation jenkins-sandbox new-ast new-ast-unique-expr new-env no_list persistent-indexer pthread-emulation qualifiedEnum resolv-new with_gc
Last change on this file since 84733c1 was f232977, checked in by Rob Schluntz <rschlunt@…>, 8 years ago

Refactor assignment return autogen code
  • Property mode set to 100644
File size: 34.0 KB
Line 
1//
2// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
3//
4// The contents of this file are covered under the licence agreement in the
5// file "LICENCE" distributed with Cforall.
6//
7// Autogen.cc --
8//
9// Author : Rob Schluntz
10// Created On : Thu Mar 03 15:45:56 2016
11// Last Modified By : Andrew Beach
12// Last Modified On : Fri Jul 14 16:41:00 2017
13// Update Count : 62
14//
15
16#include "Autogen.h"
17
18#include <algorithm> // for count_if
19#include <cassert> // for strict_dynamic_cast, assert, assertf
20#include <iterator> // for back_insert_iterator, back_inserter
21#include <list> // for list, _List_iterator, list<>::iter...
22#include <set> // for set, _Rb_tree_const_iterator
23#include <utility> // for pair
24#include <vector> // for vector
25
26#include "AddVisit.h" // for addVisit
27#include "CodeGen/OperatorTable.h" // for isCtorDtor, isCtorDtorAssign
28#include "Common/PassVisitor.h" // for PassVisitor
29#include "Common/ScopedMap.h" // for ScopedMap<>::const_iterator, Scope...
30#include "Common/utility.h" // for cloneAll, operator+
31#include "GenPoly/ScopedSet.h" // for ScopedSet, ScopedSet<>::iterator
32#include "InitTweak/GenInit.h" // for fixReturnStatements
33#include "ResolvExpr/Resolver.h" // for resolveDecl
34#include "SymTab/Mangler.h" // for Mangler
35#include "SynTree/Attribute.h" // For Attribute
36#include "SynTree/Mutator.h" // for maybeMutate
37#include "SynTree/Statement.h" // for CompoundStmt, ReturnStmt, ExprStmt
38#include "SynTree/Type.h" // for FunctionType, Type, TypeInstType
39#include "SynTree/Visitor.h" // for maybeAccept, Visitor, acceptAll
40
41class Attribute;
42
43namespace SymTab {
44 Type * SizeType = 0;
45
46 /// Data used to generate functions generically. Specifically, the name of the generated function and a function which generates the routine protoype
47 struct FuncData {
48 typedef FunctionType * (*TypeGen)( Type * );
49 FuncData( const std::string & fname, const TypeGen & genType ) : fname( fname ), genType( genType ) {}
50 std::string fname;
51 TypeGen genType;
52 };
53
54 struct AutogenerateRoutines final : public WithDeclsToAdd, public WithVisitorRef<AutogenerateRoutines>, public WithGuards, public WithShortCircuiting, public WithIndexer {
55 AutogenerateRoutines();
56
57 void previsit( EnumDecl * enumDecl );
58 void previsit( StructDecl * structDecl );
59 void previsit( UnionDecl * structDecl );
60 void previsit( TypeDecl * typeDecl );
61 void previsit( TraitDecl * traitDecl );
62 void previsit( FunctionDecl * functionDecl );
63
64 void previsit( FunctionType * ftype );
65 void previsit( PointerType * ptype );
66
67 void previsit( CompoundStmt * compoundStmt );
68
69 private:
70
71 GenPoly::ScopedSet< std::string > structsDone;
72 unsigned int functionNesting = 0; // current level of nested functions
73
74 InitTweak::ManagedTypes managedTypes;
75 std::vector< FuncData > data;
76 };
77
78 /// generates routines for tuple types.
79 struct AutogenTupleRoutines : public WithDeclsToAdd, public WithVisitorRef<AutogenTupleRoutines>, public WithGuards, public WithShortCircuiting {
80 void previsit( FunctionDecl * functionDecl );
81
82 void postvisit( TupleType * tupleType );
83
84 void previsit( CompoundStmt * compoundStmt );
85
86 private:
87 unsigned int functionNesting = 0; // current level of nested functions
88 GenPoly::ScopedSet< std::string > seenTuples;
89 };
90
91 void autogenerateRoutines( std::list< Declaration * > &translationUnit ) {
92 PassVisitor<AutogenerateRoutines> generator;
93 acceptAll( translationUnit, generator );
94
95 // needs to be done separately because AutogenerateRoutines skips types that appear as function arguments, etc.
96 // AutogenTupleRoutines tupleGenerator;
97 // acceptAll( translationUnit, tupleGenerator );
98 }
99
100 //=============================================================================================
101 // FuncGenerator definitions
102 //=============================================================================================
103 class FuncGenerator {
104 public:
105 std::list< Declaration * > definitions, forwards;
106
107 FuncGenerator( Type * type, const std::vector< FuncData > & data, unsigned int functionNesting, SymTab::Indexer & indexer ) : type( type ), data( data ), functionNesting( functionNesting ), indexer( indexer ) {}
108
109 virtual bool shouldAutogen() const = 0;
110 void genStandardFuncs();
111 virtual void genFieldCtors() = 0;
112 protected:
113 Type * type;
114 const std::vector< FuncData > & data;
115 unsigned int functionNesting;
116 SymTab::Indexer & indexer;
117
118 virtual void genFuncBody( FunctionDecl * dcl ) = 0;
119 virtual bool isConcurrentType() const = 0;
120
121 void resolve( FunctionDecl * dcl );
122 void generatePrototypes( std::list< FunctionDecl * > & newFuncs );
123 };
124
125 class StructFuncGenerator : public FuncGenerator {
126 StructDecl * aggregateDecl;
127 public:
128 StructFuncGenerator( StructDecl * aggregateDecl, StructInstType * refType, const std::vector< FuncData > & data, unsigned int functionNesting, SymTab::Indexer & indexer ) : FuncGenerator( refType, data, functionNesting, indexer ), aggregateDecl( aggregateDecl) {}
129
130 virtual bool shouldAutogen() const override;
131 virtual bool isConcurrentType() const override;
132
133 virtual void genFuncBody( FunctionDecl * dcl ) override;
134 virtual void genFieldCtors() override;
135
136 private:
137 /// generates a single struct member operation (constructor call, destructor call, assignment call)
138 void makeMemberOp( ObjectDecl * dstParam, Expression * src, DeclarationWithType * field, FunctionDecl * func, bool forward = true );
139
140 /// 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
141 template<typename Iterator>
142 void makeFunctionBody( Iterator member, Iterator end, FunctionDecl * func, bool forward = true );
143
144 /// generate the body of a constructor which takes parameters that match fields, e.g.
145 /// void ?{}(A *, int) and void?{}(A *, int, int) for a struct A which has two int fields.
146 template<typename Iterator>
147 void makeFieldCtorBody( Iterator member, Iterator end, FunctionDecl * func );
148 };
149
150 class UnionFuncGenerator : public FuncGenerator {
151 UnionDecl * aggregateDecl;
152 public:
153 UnionFuncGenerator( UnionDecl * aggregateDecl, UnionInstType * refType, const std::vector< FuncData > & data, unsigned int functionNesting, SymTab::Indexer & indexer ) : FuncGenerator( refType, data, functionNesting, indexer ), aggregateDecl( aggregateDecl) {}
154
155 virtual bool shouldAutogen() const override;
156 virtual bool isConcurrentType() const override;
157
158 virtual void genFuncBody( FunctionDecl * dcl ) override;
159 virtual void genFieldCtors() override;
160
161 private:
162 /// generates a single struct member operation (constructor call, destructor call, assignment call)
163 template<typename OutputIterator>
164 void makeMemberOp( ObjectDecl * srcParam, ObjectDecl * dstParam, OutputIterator out );
165
166 /// 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
167 template<typename Iterator>
168 void makeFunctionBody( Iterator member, Iterator end, FunctionDecl * func, bool forward = true );
169
170 /// generate the body of a constructor which takes parameters that match fields, e.g.
171 /// void ?{}(A *, int) and void?{}(A *, int, int) for a struct A which has two int fields.
172 template<typename Iterator>
173 void makeFieldCtorBody( Iterator member, Iterator end, FunctionDecl * func );
174 };
175
176 class EnumFuncGenerator : public FuncGenerator {
177 public:
178 EnumFuncGenerator( EnumInstType * refType, const std::vector< FuncData > & data, unsigned int functionNesting, SymTab::Indexer & indexer ) : FuncGenerator( refType, data, functionNesting, indexer ) {}
179
180 virtual bool shouldAutogen() const override;
181 virtual bool isConcurrentType() const override;
182
183 virtual void genFuncBody( FunctionDecl * dcl ) override;
184 virtual void genFieldCtors() override;
185
186 private:
187 };
188
189 class TypeFuncGenerator : public FuncGenerator {
190 TypeDecl * typeDecl;
191 public:
192 TypeFuncGenerator( TypeDecl * typeDecl, TypeInstType * refType, const std::vector<FuncData> & data, unsigned int functionNesting, SymTab::Indexer & indexer ) : FuncGenerator( refType, data, functionNesting, indexer ), typeDecl( typeDecl ) {}
193
194 virtual bool shouldAutogen() const override;
195 virtual void genFuncBody( FunctionDecl * dcl ) override;
196 virtual bool isConcurrentType() const override;
197 virtual void genFieldCtors() override;
198 };
199
200 //=============================================================================================
201 // helper functions
202 //=============================================================================================
203 void generateFunctions( FuncGenerator & gen, std::list< Declaration * > & declsToAdd ) {
204 if ( ! gen.shouldAutogen() ) return;
205
206 // generate each of the functions based on the supplied FuncData objects
207 gen.genStandardFuncs();
208 gen.genFieldCtors();
209
210 declsToAdd.splice( declsToAdd.end(), gen.forwards );
211 declsToAdd.splice( declsToAdd.end(), gen.definitions );
212 }
213
214 bool isUnnamedBitfield( ObjectDecl * obj ) {
215 return obj != nullptr && obj->get_name() == "" && obj->get_bitfieldWidth() != nullptr;
216 }
217
218 /// inserts a forward declaration for functionDecl into declsToAdd
219 void addForwardDecl( FunctionDecl * functionDecl, std::list< Declaration * > & declsToAdd ) {
220 FunctionDecl * decl = functionDecl->clone();
221 delete decl->get_statements();
222 decl->set_statements( nullptr );
223 declsToAdd.push_back( decl );
224 decl->fixUniqueId();
225 }
226
227 /// given type T, generate type of default ctor/dtor, i.e. function type void (*) (T *)
228 FunctionType * genDefaultType( Type * paramType ) {
229 FunctionType *ftype = new FunctionType( Type::Qualifiers(), false );
230 ObjectDecl *dstParam = new ObjectDecl( "_dst", Type::StorageClasses(), LinkageSpec::Cforall, nullptr, new ReferenceType( Type::Qualifiers(), paramType->clone() ), nullptr );
231 ftype->get_parameters().push_back( dstParam );
232 return ftype;
233 }
234
235 /// given type T, generate type of copy ctor, i.e. function type void (*) (T *, T)
236 FunctionType * genCopyType( Type * paramType ) {
237 FunctionType *ftype = genDefaultType( paramType );
238 ObjectDecl *srcParam = new ObjectDecl( "_src", Type::StorageClasses(), LinkageSpec::Cforall, nullptr, paramType->clone(), nullptr );
239 ftype->get_parameters().push_back( srcParam );
240 return ftype;
241 }
242
243 /// given type T, generate type of assignment, i.e. function type T (*) (T *, T)
244 FunctionType * genAssignType( Type * paramType ) {
245 FunctionType *ftype = genCopyType( paramType );
246 ObjectDecl *returnVal = new ObjectDecl( "_ret", Type::StorageClasses(), LinkageSpec::Cforall, nullptr, paramType->clone(), nullptr );
247 ftype->get_returnVals().push_back( returnVal );
248 return ftype;
249 }
250
251 /// generate a function decl from a name and type. Nesting depth determines whether
252 /// the declaration is static or not; optional paramter determines if declaration is intrinsic
253 FunctionDecl * genFunc( const std::string & fname, FunctionType * ftype, unsigned int functionNesting, bool isIntrinsic = false ) {
254 // Routines at global scope marked "static" to prevent multiple definitions in separate translation units
255 // because each unit generates copies of the default routines for each aggregate.
256 Type::StorageClasses scs = functionNesting > 0 ? Type::StorageClasses() : Type::StorageClasses( Type::Static );
257 LinkageSpec::Spec spec = isIntrinsic ? LinkageSpec::Intrinsic : LinkageSpec::AutoGen;
258 FunctionDecl * decl = new FunctionDecl( fname, scs, spec, ftype, new CompoundStmt( noLabels ),
259 std::list< Attribute * >(), Type::FuncSpecifiers( Type::Inline ) );
260 decl->fixUniqueId();
261 return decl;
262 }
263
264 Type * declToType( Declaration * decl ) {
265 if ( DeclarationWithType * dwt = dynamic_cast< DeclarationWithType * >( decl ) ) {
266 return dwt->get_type();
267 }
268 return nullptr;
269 }
270
271 Type * declToTypeDeclBase( Declaration * decl ) {
272 if ( TypeDecl * td = dynamic_cast< TypeDecl * >( decl ) ) {
273 return td->base;
274 }
275 return nullptr;
276 }
277
278 const std::list< TypeDecl * > getGenericParams( Type * t ) {
279 std::list< TypeDecl * > * ret = nullptr;
280 if ( StructInstType * inst = dynamic_cast< StructInstType * > ( t ) ) {
281 ret = inst->get_baseParameters();
282 } else if ( UnionInstType * inst = dynamic_cast< UnionInstType * >( t ) ) {
283 ret = inst->get_baseParameters();
284 }
285 return ret ? *ret : std::list< TypeDecl * >();
286 }
287
288 //=============================================================================================
289 // FuncGenerator member definitions
290 //=============================================================================================
291 void FuncGenerator::genStandardFuncs() {
292 std::list< FunctionDecl * > newFuncs;
293 generatePrototypes( newFuncs );
294
295 for ( FunctionDecl * dcl : newFuncs ) {
296 genFuncBody( dcl );
297 if ( CodeGen::isAssignment( dcl->name ) ) {
298 // assignment needs to return a value
299 FunctionType * assignType = dcl->type;
300 assert( assignType->parameters.size() == 2 );
301 assert( assignType->returnVals.size() == 1 );
302 ObjectDecl * dstParam = strict_dynamic_cast< ObjectDecl * >( assignType->parameters.front() );
303 dcl->statements->push_back( new ReturnStmt( noLabels, new VariableExpr( dstParam ) ) );
304 }
305 resolve( dcl );
306 }
307 }
308
309 void FuncGenerator::generatePrototypes( std::list< FunctionDecl * > & newFuncs ) {
310 bool concurrent_type = isConcurrentType();
311 for ( const FuncData & data : data ) {
312 // generate a function (?{}, ?=?, ^?{}) based on the current FuncData.
313 FunctionType * ftype = data.genType( type );
314
315 // destructor for concurrent type must be mutex
316 if ( concurrent_type && CodeGen::isDestructor( data.fname ) ) {
317 ftype->parameters.front()->get_type()->set_mutex( true );
318 }
319
320 // Make function polymorphic in same parameters as generic struct, if applicable
321 std::list< TypeDecl * > typeParams = getGenericParams( type ); // List of type variables to be placed on the generated functions
322 cloneAll( typeParams, ftype->forall );
323
324 newFuncs.push_back( genFunc( data.fname, ftype, functionNesting ) );
325 }
326 }
327
328 void FuncGenerator::resolve( FunctionDecl * dcl ) {
329 try {
330 ResolvExpr::resolveDecl( dcl, indexer );
331 if ( functionNesting == 0 ) {
332 // forward declare if top-level struct, so that
333 // type is complete as soon as its body ends
334 // Note: this is necessary if we want structs which contain
335 // generic (otype) structs as members.
336 addForwardDecl( dcl, forwards );
337 }
338 definitions.push_back( dcl );
339 indexer.addId( dcl );
340 } catch ( SemanticError err ) {
341 // okay if decl does not resolve - that means the function should not be generated
342 delete dcl;
343 }
344 }
345
346 bool StructFuncGenerator::shouldAutogen() const {
347 // Builtins do not use autogeneration.
348 return ! aggregateDecl->linkage.is_builtin;
349 }
350 bool StructFuncGenerator::isConcurrentType() const { return aggregateDecl->is_thread() || aggregateDecl->is_monitor(); }
351
352 void StructFuncGenerator::genFuncBody( FunctionDecl * dcl ) {
353 // generate appropriate calls to member ctor, assignment
354 // destructor needs to do everything in reverse, so pass "forward" based on whether the function is a destructor
355 if ( ! CodeGen::isDestructor( dcl->get_name() ) ) {
356 makeFunctionBody( aggregateDecl->members.begin(), aggregateDecl->members.end(), dcl );
357 } else {
358 makeFunctionBody( aggregateDecl->members.rbegin(), aggregateDecl->members.rend(), dcl, false );
359 }
360 }
361
362 void StructFuncGenerator::genFieldCtors() {
363 // field ctors are only generated if default constructor and copy constructor are both generated
364 unsigned numCtors = std::count_if( definitions.begin(), definitions.end(), [](Declaration * dcl) { return CodeGen::isConstructor( dcl->get_name() ); } );
365
366 // Field constructors are only generated if default and copy constructor
367 // are generated, since they need access to both
368 if ( numCtors != 2 ) return;
369
370 // create constructors which take each member type as a parameter.
371 // for example, for struct A { int x, y; }; generate
372 // void ?{}(A *, int) and void ?{}(A *, int, int)
373 const auto & typeParams = aggregateDecl->parameters;
374 FunctionType * memCtorType = genDefaultType( type );
375 cloneAll( typeParams, memCtorType->forall );
376 for ( Declaration * member : aggregateDecl->members ) {
377 DeclarationWithType * field = strict_dynamic_cast<DeclarationWithType *>( member );
378 if ( isUnnamedBitfield( dynamic_cast< ObjectDecl * > ( field ) ) ) {
379 // don't make a function whose parameter is an unnamed bitfield
380 continue;
381 }
382 memCtorType->parameters.push_back( new ObjectDecl( field->name, Type::StorageClasses(), LinkageSpec::Cforall, 0, field->get_type()->clone(), 0 ) );
383 FunctionDecl * ctor = genFunc( "?{}", memCtorType->clone(), functionNesting );
384 makeFieldCtorBody( aggregateDecl->members.begin(), aggregateDecl->members.end(), ctor );
385 resolve( ctor );
386 }
387 delete memCtorType;
388 }
389
390 void StructFuncGenerator::makeMemberOp( ObjectDecl * dstParam, Expression * src, DeclarationWithType * field, FunctionDecl * func, bool forward ) {
391 InitTweak::InitExpander srcParam( src );
392
393 // assign to destination
394 Expression *dstselect = new MemberExpr( field, new CastExpr( new VariableExpr( dstParam ), strict_dynamic_cast< ReferenceType* >( dstParam->get_type() )->get_base()->clone() ) );
395 genImplicitCall( srcParam, dstselect, func->get_name(), back_inserter( func->get_statements()->get_kids() ), field, forward );
396 }
397
398 template<typename Iterator>
399 void StructFuncGenerator::makeFunctionBody( Iterator member, Iterator end, FunctionDecl * func, bool forward ) {
400 for ( ; member != end; ++member ) {
401 if ( DeclarationWithType *field = dynamic_cast< DeclarationWithType * >( *member ) ) { // otherwise some form of type declaration, e.g. Aggregate
402 // query the type qualifiers of this field and skip assigning it if it is marked const.
403 // If it is an array type, we need to strip off the array layers to find its qualifiers.
404 Type * type = field->get_type();
405 while ( ArrayType * at = dynamic_cast< ArrayType * >( type ) ) {
406 type = at->get_base();
407 }
408
409 if ( type->get_const() && func->get_name() == "?=?" ) {
410 // don't assign const members, but do construct/destruct
411 continue;
412 }
413
414 assert( ! func->get_functionType()->get_parameters().empty() );
415 ObjectDecl * dstParam = dynamic_cast<ObjectDecl*>( func->get_functionType()->get_parameters().front() );
416 ObjectDecl * srcParam = nullptr;
417 if ( func->get_functionType()->get_parameters().size() == 2 ) {
418 srcParam = dynamic_cast<ObjectDecl*>( func->get_functionType()->get_parameters().back() );
419 }
420 // srcParam may be NULL, in which case we have default ctor/dtor
421 assert( dstParam );
422
423 Expression *srcselect = srcParam ? new MemberExpr( field, new VariableExpr( srcParam ) ) : nullptr;
424 makeMemberOp( dstParam, srcselect, field, func, forward );
425 } // if
426 } // for
427 } // makeFunctionBody
428
429 template<typename Iterator>
430 void StructFuncGenerator::makeFieldCtorBody( Iterator member, Iterator end, FunctionDecl * func ) {
431 FunctionType * ftype = func->type;
432 std::list<DeclarationWithType*> & params = ftype->parameters;
433 assert( params.size() >= 2 ); // should not call this function for default ctor, etc.
434
435 // skip 'this' parameter
436 ObjectDecl * dstParam = dynamic_cast<ObjectDecl*>( params.front() );
437 assert( dstParam );
438 std::list<DeclarationWithType*>::iterator parameter = params.begin()+1;
439 for ( ; member != end; ++member ) {
440 if ( DeclarationWithType * field = dynamic_cast<DeclarationWithType*>( *member ) ) {
441 if ( isUnnamedBitfield( dynamic_cast< ObjectDecl * > ( field ) ) ) {
442 // don't make a function whose parameter is an unnamed bitfield
443 continue;
444 } else if ( parameter != params.end() ) {
445 // matching parameter, initialize field with copy ctor
446 Expression *srcselect = new VariableExpr(*parameter);
447 makeMemberOp( dstParam, srcselect, field, func );
448 ++parameter;
449 } else {
450 // no matching parameter, initialize field with default ctor
451 makeMemberOp( dstParam, nullptr, field, func );
452 }
453 }
454 }
455 }
456
457 bool UnionFuncGenerator::shouldAutogen() const {
458 // Builtins do not use autogeneration.
459 return ! aggregateDecl->linkage.is_builtin;
460 }
461
462 // xxx - is this right?
463 bool UnionFuncGenerator::isConcurrentType() const { return false; };
464
465 /// generate a single union assignment expression (using memcpy)
466 template< typename OutputIterator >
467 void UnionFuncGenerator::makeMemberOp( ObjectDecl * srcParam, ObjectDecl * dstParam, OutputIterator out ) {
468 UntypedExpr *copy = new UntypedExpr( new NameExpr( "__builtin_memcpy" ) );
469 copy->args.push_back( new AddressExpr( new VariableExpr( dstParam ) ) );
470 copy->args.push_back( new AddressExpr( new VariableExpr( srcParam ) ) );
471 copy->args.push_back( new SizeofExpr( srcParam->get_type()->clone() ) );
472 *out++ = new ExprStmt( noLabels, copy );
473 }
474
475 /// generates the body of a union assignment/copy constructor/field constructor
476 void UnionFuncGenerator::genFuncBody( FunctionDecl * funcDecl ) {
477 FunctionType * ftype = funcDecl->type;
478 if ( InitTweak::isCopyConstructor( funcDecl ) || InitTweak::isAssignment( funcDecl ) ) {
479 assert( ftype->parameters.size() == 2 );
480 ObjectDecl * dstParam = strict_dynamic_cast< ObjectDecl * >( ftype->parameters.front() );
481 ObjectDecl * srcParam = strict_dynamic_cast< ObjectDecl * >( ftype->parameters.back() );
482 makeMemberOp( srcParam, dstParam, back_inserter( funcDecl->statements->kids ) );
483 } else {
484 // default ctor/dtor body is empty - add unused attribute to parameter to silence warnings
485 assert( ftype->parameters.size() == 1 );
486 ObjectDecl * dstParam = strict_dynamic_cast< ObjectDecl * >( ftype->parameters.front() );
487 dstParam->attributes.push_back( new Attribute( "unused" ) );
488 }
489 }
490
491 /// generate the body of a constructor which takes parameters that match fields, e.g.
492 /// void ?{}(A *, int) and void?{}(A *, int, int) for a struct A which has two int fields.
493 void UnionFuncGenerator::genFieldCtors() {
494 // field ctors are only generated if default constructor and copy constructor are both generated
495 unsigned numCtors = std::count_if( definitions.begin(), definitions.end(), [](Declaration * dcl) { return CodeGen::isConstructor( dcl->get_name() ); } );
496
497 // Field constructors are only generated if default and copy constructor
498 // are generated, since they need access to both
499 if ( numCtors != 2 ) return;
500
501 // create a constructor which takes the first member type as a parameter.
502 // for example, for Union A { int x; double y; }; generate
503 // void ?{}(A *, int)
504 // This is to mimic C's behaviour which initializes the first member of the union.
505 const auto & typeParams = aggregateDecl->parameters;
506 FunctionType * memCtorType = genDefaultType( type );
507 cloneAll( typeParams, memCtorType->forall );
508 for ( Declaration * member : aggregateDecl->members ) {
509 DeclarationWithType * field = strict_dynamic_cast<DeclarationWithType *>( member );
510 if ( isUnnamedBitfield( dynamic_cast< ObjectDecl * > ( field ) ) ) {
511 // don't make a function whose parameter is an unnamed bitfield
512 break;
513 }
514 memCtorType->parameters.push_back( new ObjectDecl( field->name, Type::StorageClasses(), LinkageSpec::Cforall, nullptr, field->get_type()->clone(), nullptr ) );
515 FunctionDecl * ctor = genFunc( "?{}", memCtorType->clone(), functionNesting );
516 ObjectDecl * srcParam = strict_dynamic_cast<ObjectDecl *>( ctor->type->parameters.back() );
517 ObjectDecl * dstParam = InitTweak::getParamThis( ctor->type );
518 makeMemberOp( srcParam, dstParam, back_inserter( ctor->statements->kids ) );
519 resolve( ctor );
520 // only generate one field ctor for unions
521 break;
522 }
523 delete memCtorType;
524 }
525
526 void EnumFuncGenerator::genFuncBody( FunctionDecl * funcDecl ) {
527 // xxx - Temporary: make these functions intrinsic so they codegen as C assignment.
528 // Really they're something of a cross between instrinsic and autogen, so should
529 // probably make a new linkage type
530 funcDecl->linkage = LinkageSpec::Intrinsic;
531 FunctionType * ftype = funcDecl->type;
532 if ( InitTweak::isCopyConstructor( funcDecl ) || InitTweak::isAssignment( funcDecl ) ) {
533 assert( ftype->parameters.size() == 2 );
534 ObjectDecl * dstParam = strict_dynamic_cast< ObjectDecl * >( ftype->parameters.front() );
535 ObjectDecl * srcParam = strict_dynamic_cast< ObjectDecl * >( ftype->parameters.back() );
536
537 // enum copy construct and assignment is just C-style assignment.
538 // this looks like a bad recursive call, but code gen will turn it into
539 // a C-style assignment.
540 // This happens before function pointer type conversion, so need to do it manually here
541 ApplicationExpr * callExpr = new ApplicationExpr( VariableExpr::functionPointer( funcDecl ) );
542 callExpr->get_args().push_back( new VariableExpr( dstParam ) );
543 callExpr->get_args().push_back( new VariableExpr( srcParam ) );
544 funcDecl->statements->push_back( new ExprStmt( noLabels, callExpr ) );
545 } else {
546 // default ctor/dtor body is empty - add unused attribute to parameter to silence warnings
547 assert( ftype->parameters.size() == 1 );
548 ObjectDecl * dstParam = strict_dynamic_cast< ObjectDecl * >( ftype->parameters.front() );
549 dstParam->attributes.push_back( new Attribute( "unused" ) );
550 }
551 }
552
553 bool EnumFuncGenerator::shouldAutogen() const { return true; }
554 bool EnumFuncGenerator::isConcurrentType() const { return false; }
555 // enums do not have field constructors
556 void EnumFuncGenerator::genFieldCtors() {}
557
558 bool TypeFuncGenerator::shouldAutogen() const { return true; };
559
560 void TypeFuncGenerator::genFuncBody( FunctionDecl * dcl ) {
561 FunctionType * ftype = dcl->type;
562 assertf( ftype->parameters.size() == 1 || ftype->parameters.size() == 2, "Incorrect number of parameters in autogenerated typedecl function: %zd", ftype->parameters.size() );
563 DeclarationWithType * dst = ftype->parameters.front();
564 DeclarationWithType * src = ftype->parameters.size() == 2 ? ftype->parameters.back() : nullptr;
565 // generate appropriate calls to member ctor, assignment
566 UntypedExpr * expr = new UntypedExpr( new NameExpr( dcl->name ) );
567 expr->args.push_back( new CastExpr( new VariableExpr( dst ), new ReferenceType( Type::Qualifiers(), typeDecl->base->clone() ) ) );
568 if ( src ) expr->args.push_back( new CastExpr( new VariableExpr( src ), typeDecl->base->clone() ) );
569 dcl->statements->kids.push_back( new ExprStmt( noLabels, expr ) );
570 };
571
572 // xxx - should reach in and determine if base type is concurrent?
573 bool TypeFuncGenerator::isConcurrentType() const { return false; };
574
575 // opaque types do not have field constructors
576 void TypeFuncGenerator::genFieldCtors() {};
577
578 //=============================================================================================
579 // Visitor definitions
580 //=============================================================================================
581 AutogenerateRoutines::AutogenerateRoutines() {
582 // the order here determines the order that these functions are generated.
583 // assignment should come last since it uses copy constructor in return.
584 data.emplace_back( "?{}", genDefaultType );
585 data.emplace_back( "?{}", genCopyType );
586 data.emplace_back( "^?{}", genDefaultType );
587 data.emplace_back( "?=?", genAssignType );
588 }
589
590 void AutogenerateRoutines::previsit( EnumDecl * enumDecl ) {
591 // must visit children (enum constants) to add them to the indexer
592 if ( enumDecl->has_body() ) {
593 EnumInstType enumInst( Type::Qualifiers(), enumDecl->get_name() );
594 enumInst.set_baseEnum( enumDecl );
595 EnumFuncGenerator gen( &enumInst, data, functionNesting, indexer );
596 generateFunctions( gen, declsToAddAfter );
597 }
598 }
599
600 void AutogenerateRoutines::previsit( StructDecl * structDecl ) {
601 visit_children = false;
602 if ( structDecl->has_body() ) {
603 StructInstType structInst( Type::Qualifiers(), structDecl->name );
604 structInst.set_baseStruct( structDecl );
605 for ( TypeDecl * typeDecl : structDecl->parameters ) {
606 structInst.parameters.push_back( new TypeExpr( new TypeInstType( Type::Qualifiers(), typeDecl->name, typeDecl ) ) );
607 }
608 StructFuncGenerator gen( structDecl, &structInst, data, functionNesting, indexer );
609 generateFunctions( gen, declsToAddAfter );
610 } // if
611 }
612
613 void AutogenerateRoutines::previsit( UnionDecl * unionDecl ) {
614 visit_children = false;
615 if ( unionDecl->has_body() ) {
616 UnionInstType unionInst( Type::Qualifiers(), unionDecl->get_name() );
617 unionInst.set_baseUnion( unionDecl );
618 for ( TypeDecl * typeDecl : unionDecl->get_parameters() ) {
619 unionInst.get_parameters().push_back( new TypeExpr( new TypeInstType( Type::Qualifiers(), typeDecl->get_name(), typeDecl ) ) );
620 }
621 UnionFuncGenerator gen( unionDecl, &unionInst, data, functionNesting, indexer );
622 generateFunctions( gen, declsToAddAfter );
623 } // if
624 }
625
626 // generate ctor/dtors/assign for typedecls, e.g., otype T = int *;
627 void AutogenerateRoutines::previsit( TypeDecl * typeDecl ) {
628 visit_children = false;
629 if ( ! typeDecl->base ) return;
630
631 TypeInstType refType( Type::Qualifiers(), typeDecl->name, typeDecl );
632 TypeFuncGenerator gen( typeDecl, &refType, data, functionNesting, indexer );
633 generateFunctions( gen, declsToAddAfter );
634 }
635
636 void AutogenerateRoutines::previsit( FunctionType *) {
637 // ensure that we don't add assignment ops for types defined as part of the function
638 visit_children = false;
639 }
640
641 void AutogenerateRoutines::previsit( PointerType *) {
642 // ensure that we don't add assignment ops for types defined as part of the pointer
643 visit_children = false;
644 }
645
646 void AutogenerateRoutines::previsit( TraitDecl * ) {
647 // ensure that we don't add assignment ops for types defined as part of the trait
648 visit_children = false;
649 }
650
651 void AutogenerateRoutines::previsit( FunctionDecl * functionDecl ) {
652 visit_children = false;
653 // record the existence of this function as appropriate
654 managedTypes.handleDWT( functionDecl );
655
656 maybeAccept( functionDecl->type, *visitor );
657 functionNesting += 1;
658 maybeAccept( functionDecl->statements, *visitor );
659 functionNesting -= 1;
660 }
661
662 void AutogenerateRoutines::previsit( CompoundStmt * ) {
663 GuardScope( managedTypes );
664 GuardScope( structsDone );
665 }
666
667 void makeTupleFunctionBody( FunctionDecl * function ) {
668 FunctionType * ftype = function->get_functionType();
669 assertf( ftype->get_parameters().size() == 1 || ftype->get_parameters().size() == 2, "too many parameters in generated tuple function" );
670
671 UntypedExpr * untyped = new UntypedExpr( new NameExpr( function->get_name() ) );
672
673 /// xxx - &* is used to make this easier for later passes to handle
674 untyped->get_args().push_back( new AddressExpr( UntypedExpr::createDeref( new VariableExpr( ftype->get_parameters().front() ) ) ) );
675 if ( ftype->get_parameters().size() == 2 ) {
676 untyped->get_args().push_back( new VariableExpr( ftype->get_parameters().back() ) );
677 }
678 function->get_statements()->get_kids().push_back( new ExprStmt( noLabels, untyped ) );
679 function->get_statements()->get_kids().push_back( new ReturnStmt( noLabels, UntypedExpr::createDeref( new VariableExpr( ftype->get_parameters().front() ) ) ) );
680 }
681
682 void AutogenTupleRoutines::postvisit( TupleType * tupleType ) {
683 std::string mangleName = SymTab::Mangler::mangleType( tupleType );
684 if ( seenTuples.find( mangleName ) != seenTuples.end() ) return;
685 seenTuples.insert( mangleName );
686
687 // T ?=?(T *, T);
688 FunctionType *assignType = genAssignType( tupleType );
689
690 // void ?{}(T *); void ^?{}(T *);
691 FunctionType *ctorType = genDefaultType( tupleType );
692 FunctionType *dtorType = genDefaultType( tupleType );
693
694 // void ?{}(T *, T);
695 FunctionType *copyCtorType = genCopyType( tupleType );
696
697 std::set< TypeDecl* > done;
698 std::list< TypeDecl * > typeParams;
699 for ( Type * t : *tupleType ) {
700 if ( TypeInstType * ty = dynamic_cast< TypeInstType * >( t ) ) {
701 if ( ! done.count( ty->get_baseType() ) ) {
702 TypeDecl * newDecl = new TypeDecl( ty->get_baseType()->get_name(), Type::StorageClasses(), nullptr, TypeDecl::Any );
703 TypeInstType * inst = new TypeInstType( Type::Qualifiers(), newDecl->get_name(), newDecl );
704 newDecl->get_assertions().push_back( new FunctionDecl( "?=?", Type::StorageClasses(), LinkageSpec::Cforall, genAssignType( inst ), nullptr,
705 std::list< Attribute * >(), Type::FuncSpecifiers( Type::Inline ) ) );
706 newDecl->get_assertions().push_back( new FunctionDecl( "?{}", Type::StorageClasses(), LinkageSpec::Cforall, genDefaultType( inst ), nullptr,
707 std::list< Attribute * >(), Type::FuncSpecifiers( Type::Inline ) ) );
708 newDecl->get_assertions().push_back( new FunctionDecl( "?{}", Type::StorageClasses(), LinkageSpec::Cforall, genCopyType( inst ), nullptr,
709 std::list< Attribute * >(), Type::FuncSpecifiers( Type::Inline ) ) );
710 newDecl->get_assertions().push_back( new FunctionDecl( "^?{}", Type::StorageClasses(), LinkageSpec::Cforall, genDefaultType( inst ), nullptr,
711 std::list< Attribute * >(), Type::FuncSpecifiers( Type::Inline ) ) );
712 typeParams.push_back( newDecl );
713 done.insert( ty->get_baseType() );
714 }
715 }
716 }
717 cloneAll( typeParams, ctorType->get_forall() );
718 cloneAll( typeParams, dtorType->get_forall() );
719 cloneAll( typeParams, copyCtorType->get_forall() );
720 cloneAll( typeParams, assignType->get_forall() );
721
722 FunctionDecl *assignDecl = genFunc( "?=?", assignType, functionNesting );
723 FunctionDecl *ctorDecl = genFunc( "?{}", ctorType, functionNesting );
724 FunctionDecl *copyCtorDecl = genFunc( "?{}", copyCtorType, functionNesting );
725 FunctionDecl *dtorDecl = genFunc( "^?{}", dtorType, functionNesting );
726
727 makeTupleFunctionBody( assignDecl );
728 makeTupleFunctionBody( ctorDecl );
729 makeTupleFunctionBody( copyCtorDecl );
730 makeTupleFunctionBody( dtorDecl );
731
732 declsToAddBefore.push_back( ctorDecl );
733 declsToAddBefore.push_back( copyCtorDecl );
734 declsToAddBefore.push_back( dtorDecl );
735 declsToAddBefore.push_back( assignDecl ); // assignment should come last since it uses copy constructor in return
736 }
737
738 void AutogenTupleRoutines::previsit( FunctionDecl *functionDecl ) {
739 visit_children = false;
740 maybeAccept( functionDecl->type, *visitor );
741 functionNesting += 1;
742 maybeAccept( functionDecl->statements, *visitor );
743 functionNesting -= 1;
744 }
745
746 void AutogenTupleRoutines::previsit( CompoundStmt * ) {
747 GuardScope( seenTuples );
748 }
749} // SymTab
750
751// Local Variables: //
752// tab-width: 4 //
753// mode: c++ //
754// compile-command: "make install" //
755// End: //
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