Context Navigation

source: src/SymTab/Autogen.cc @ 53a8e68

ADTaaron-thesisarm-ehast-experimentalcleanup-dtorsdeferred_resndemanglerenumforall-pointer-decayjacob/cs343-translationjenkins-sandboxnew-astnew-ast-unique-exprnew-envno_listpersistent-indexerpthread-emulationqualifiedEnumresolv-newwith_gc

Last change on this file since 53a8e68 was 49148d5, checked in by Rob Schluntz <rschlunt@…>, 7 years ago
Update autogen to generate ctor/dtor/assign with references
Property mode set to `100644`
File size: 36.1 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 : Wed Jun 28 15:30:00 2017
13	// Update Count : 61
14	//
15
16	#include <list>
17	#include <iterator>
18	#include "SynTree/Visitor.h"
19	#include "SynTree/Type.h"
20	#include "SynTree/Statement.h"
21	#include "SynTree/TypeSubstitution.h"
22	#include "Common/utility.h"
23	#include "AddVisit.h"
24	#include "MakeLibCfa.h"
25	#include "Autogen.h"
26	#include "GenPoly/ScopedSet.h"
27	#include "Common/ScopedMap.h"
28	#include "SymTab/Mangler.h"
29	#include "GenPoly/DeclMutator.h"
30
31	namespace SymTab {
32	Type * SizeType = 0;
33	typedef ScopedMap< std::string, bool > TypeMap;
34
35	/// Data used to generate functions generically. Specifically, the name of the generated function, a function which generates the routine protoype, and a map which contains data to determine whether a function should be generated.
36	struct FuncData {
37	typedef FunctionType * (TypeGen)( Type );
38	FuncData( const std::string & fname, const TypeGen & genType, TypeMap & map ) : fname( fname ), genType( genType ), map( map ) {}
39	std::string fname;
40	TypeGen genType;
41	TypeMap & map;
42	};
43
44	class AutogenerateRoutines final : public Visitor {
45	template< typename Visitor >
46	friend void acceptAndAdd( std::list< Declaration * > &translationUnit, Visitor &visitor );
47	template< typename Visitor >
48	friend void addVisitStatementList( std::list< Statement* > &stmts, Visitor &visitor );
49	public:
50	std::list< Declaration * > &get_declsToAdd() { return declsToAdd; }
51
52	typedef Visitor Parent;
53	using Parent::visit;
54
55	AutogenerateRoutines();
56
57	virtual void visit( EnumDecl *enumDecl );
58	virtual void visit( StructDecl *structDecl );
59	virtual void visit( UnionDecl *structDecl );
60	virtual void visit( TypeDecl *typeDecl );
61	virtual void visit( TraitDecl *ctxDecl );
62	virtual void visit( FunctionDecl *functionDecl );
63
64	virtual void visit( FunctionType *ftype );
65	virtual void visit( PointerType *ftype );
66
67	virtual void visit( CompoundStmt *compoundStmt );
68	virtual void visit( SwitchStmt *switchStmt );
69
70	private:
71	template< typename StmtClass > void visitStatement( StmtClass *stmt );
72
73	std::list< Declaration * > declsToAdd, declsToAddAfter;
74	std::set< std::string > structsDone;
75	unsigned int functionNesting = 0; // current level of nested functions
76	/// Note: the following maps could be ScopedSets, but it should be easier to work
77	/// deleted functions in if they are maps, since the value false can be inserted
78	/// at the current scope without affecting outer scopes or requiring copies.
79	TypeMap copyable, assignable, constructable, destructable;
80	std::vector< FuncData > data;
81	};
82
83	/// generates routines for tuple types.
84	/// Doesn't really need to be a mutator, but it's easier to reuse DeclMutator than it is to use AddVisit
85	/// or anything we currently have that supports adding new declarations for visitors
86	class AutogenTupleRoutines : public GenPoly::DeclMutator {
87	public:
88	typedef GenPoly::DeclMutator Parent;
89	using Parent::mutate;
90
91	virtual DeclarationWithType * mutate( FunctionDecl *functionDecl );
92
93	virtual Type * mutate( TupleType *tupleType );
94
95	virtual CompoundStmt * mutate( CompoundStmt *compoundStmt );
96
97	private:
98	unsigned int functionNesting = 0; // current level of nested functions
99	GenPoly::ScopedSet< std::string > seenTuples;
100	};
101
102	void autogenerateRoutines( std::list< Declaration * > &translationUnit ) {
103	AutogenerateRoutines generator;
104	acceptAndAdd( translationUnit, generator );
105
106	// needs to be done separately because AutogenerateRoutines skips types that appear as function arguments, etc.
107	// AutogenTupleRoutines tupleGenerator;
108	// tupleGenerator.mutateDeclarationList( translationUnit );
109	}
110
111	bool isUnnamedBitfield( ObjectDecl * obj ) {
112	return obj != NULL && obj->get_name() == "" && obj->get_bitfieldWidth() != NULL;
113	}
114
115	/// inserts a forward declaration for functionDecl into declsToAdd
116	void addForwardDecl( FunctionDecl * functionDecl, std::list< Declaration * > & declsToAdd ) {
117	FunctionDecl * decl = functionDecl->clone();
118	delete decl->get_statements();
119	decl->set_statements( NULL );
120	declsToAdd.push_back( decl );
121	decl->fixUniqueId();
122	}
123
124	/// given type T, generate type of default ctor/dtor, i.e. function type void () (T )
125	FunctionType * genDefaultType( Type * paramType ) {
126	FunctionType *ftype = new FunctionType( Type::Qualifiers(), false );
127	ObjectDecl *dstParam = new ObjectDecl( "_dst", Type::StorageClasses(), LinkageSpec::Cforall, nullptr, new ReferenceType( Type::Qualifiers(), paramType->clone() ), nullptr );
128	ftype->get_parameters().push_back( dstParam );
129
130	return ftype;
131	}
132
133	/// given type T, generate type of copy ctor, i.e. function type void () (T , T)
134	FunctionType * genCopyType( Type * paramType ) {
135	FunctionType *ftype = genDefaultType( paramType );
136	ObjectDecl *srcParam = new ObjectDecl( "_src", Type::StorageClasses(), LinkageSpec::Cforall, nullptr, paramType->clone(), nullptr );
137	ftype->get_parameters().push_back( srcParam );
138	return ftype;
139	}
140
141	/// given type T, generate type of assignment, i.e. function type T () (T , T)
142	FunctionType * genAssignType( Type * paramType ) {
143	FunctionType *ftype = genCopyType( paramType );
144	ObjectDecl *returnVal = new ObjectDecl( "_ret", Type::StorageClasses(), LinkageSpec::Cforall, nullptr, paramType->clone(), nullptr );
145	ftype->get_returnVals().push_back( returnVal );
146	return ftype;
147	}
148
149	/// true if the aggregate's layout is dynamic
150	template< typename AggrDecl >
151	bool hasDynamicLayout( AggrDecl * aggregateDecl ) {
152	for ( TypeDecl * param : aggregateDecl->get_parameters() ) {
153	if ( param->isComplete() ) return true;
154	}
155	return false;
156	}
157
158	/// generate a function decl from a name and type. Nesting depth determines whether
159	/// the declaration is static or not; optional paramter determines if declaration is intrinsic
160	FunctionDecl * genFunc( const std::string & fname, FunctionType * ftype, unsigned int functionNesting, bool isIntrinsic = false ) {
161	// Routines at global scope marked "static" to prevent multiple definitions in separate translation units
162	// because each unit generates copies of the default routines for each aggregate.
163	// DeclarationNode::StorageClass sc = functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static;
164	Type::StorageClasses scs = functionNesting > 0 ? Type::StorageClasses() : Type::StorageClasses( Type::Static );
165	LinkageSpec::Spec spec = isIntrinsic ? LinkageSpec::Intrinsic : LinkageSpec::AutoGen;
166	FunctionDecl * decl = new FunctionDecl( fname, scs, spec, ftype, new CompoundStmt( noLabels ),
167	std::list< Attribute * >(), Type::FuncSpecifiers( Type::Inline ) );
168	decl->fixUniqueId();
169	return decl;
170	}
171
172	/// inserts base type of first argument into map if pred(funcDecl) is true
173	void insert( FunctionDecl funcDecl, TypeMap & map, FunctionDecl (pred)(Declaration ) ) {
174	// insert type into constructable, etc. map if appropriate
175	if ( pred( funcDecl ) ) {
176	FunctionType * ftype = funcDecl->get_functionType();
177	assert( ! ftype->get_parameters().empty() );
178	Type * t = InitTweak::getPointerBase( ftype->get_parameters().front()->get_type() );
179	assert( t );
180	map.insert( Mangler::mangleType( t ), true );
181	}
182	}
183
184	/// using map and t, determines if is constructable, etc.
185	bool lookup( const TypeMap & map, Type * t ) {
186	if ( dynamic_cast< PointerType * >( t ) ) {
187	// will need more complicated checking if we want this to work with pointer types, since currently
188	return true;
189	} else if ( ArrayType * at = dynamic_cast< ArrayType * >( t ) ) {
190	// an array's constructor, etc. is generated on the fly based on the base type's constructor, etc.
191	return lookup( map, at->get_base() );
192	}
193	TypeMap::const_iterator it = map.find( Mangler::mangleType( t ) );
194	if ( it != map.end() ) return it->second;
195	// something that does not appear in the map is by default not constructable, etc.
196	return false;
197	}
198
199	/// using map and aggr, examines each member to determine if constructor, etc. should be generated
200	template<typename AggrDecl>
201	bool shouldGenerate( const TypeMap & map, AggrDecl * aggr ) {
202	for ( Declaration * dcl : aggr->get_members() ) {
203	if ( DeclarationWithType * dwt = dynamic_cast< DeclarationWithType * >( dcl ) ) {
204	if ( ! lookup( map, dwt->get_type() ) ) return false;
205	}
206	}
207	return true;
208	}
209
210	/// data structure for abstracting the generation of special functions
211	template< typename OutputIterator >
212	struct FuncGenerator {
213	StructDecl *aggregateDecl;
214	StructInstType *refType;
215	unsigned int functionNesting;
216	const std::list< TypeDecl* > & typeParams;
217	OutputIterator out;
218	FuncGenerator( StructDecl aggregateDecl, StructInstType refType, unsigned int functionNesting, const std::list< TypeDecl* > & typeParams, OutputIterator out ) : aggregateDecl( aggregateDecl ), refType( refType ), functionNesting( functionNesting ), typeParams( typeParams ), out( out ) {}
219
220	/// generates a function (?{}, ?=?, ^?{}) based on the data argument and members. If function is generated, inserts the type into the map.
221	void gen( const FuncData & data, bool concurrent_type ) {
222	if ( ! shouldGenerate( data.map, aggregateDecl ) ) return;
223	FunctionType * ftype = data.genType( refType );
224
225	if(concurrent_type && InitTweak::isDestructor( data.fname )) {
226	ftype->get_parameters().front()->get_type()->set_mutex( true );
227	}
228
229	cloneAll( typeParams, ftype->get_forall() );
230	*out++ = genFunc( data.fname, ftype, functionNesting );
231	data.map.insert( Mangler::mangleType( refType ), true );
232	}
233	};
234
235	template< typename OutputIterator >
236	FuncGenerator<OutputIterator> makeFuncGenerator( StructDecl aggregateDecl, StructInstType refType, unsigned int functionNesting, const std::list< TypeDecl* > & typeParams, OutputIterator out ) {
237	return FuncGenerator<OutputIterator>( aggregateDecl, refType, functionNesting, typeParams, out );
238	}
239
240	/// generates a single enumeration assignment expression
241	ApplicationExpr * genEnumAssign( FunctionType * ftype, FunctionDecl * assignDecl ) {
242	// enum copy construct and assignment is just C-style assignment.
243	// this looks like a bad recursive call, but code gen will turn it into
244	// a C-style assignment.
245	// This happens before function pointer type conversion, so need to do it manually here
246	// NOTE: ftype is not necessarily the functionType belonging to assignDecl - ftype is the
247	// type of the function that this expression is being generated for (so that the correct
248	// parameters) are using in the variable exprs
249	assert( ftype->get_parameters().size() == 2 );
250	ObjectDecl * dstParam = safe_dynamic_cast< ObjectDecl * >( ftype->get_parameters().front() );
251	ObjectDecl * srcParam = safe_dynamic_cast< ObjectDecl * >( ftype->get_parameters().back() );
252
253	VariableExpr * assignVarExpr = new VariableExpr( assignDecl );
254	Type * assignVarExprType = assignVarExpr->get_result();
255	assignVarExprType = new PointerType( Type::Qualifiers(), assignVarExprType );
256	assignVarExpr->set_result( assignVarExprType );
257	ApplicationExpr * assignExpr = new ApplicationExpr( assignVarExpr );
258	assignExpr->get_args().push_back( new VariableExpr( dstParam ) );
259	assignExpr->get_args().push_back( new VariableExpr( srcParam ) );
260	return assignExpr;
261	}
262
263	// E ?=?(E volatile*, int),
264	// ?=?(E _Atomic volatile*, int);
265	void makeEnumFunctions( EnumInstType refType, unsigned int functionNesting, std::list< Declaration > &declsToAdd ) {
266
267	// T ?=?(E *, E);
268	FunctionType *assignType = genAssignType( refType );
269
270	// void ?{}(E ); void ^?{}(E );
271	FunctionType * ctorType = genDefaultType( refType->clone() );
272	FunctionType * dtorType = genDefaultType( refType->clone() );
273
274	// void ?{}(E *, E);
275	FunctionType *copyCtorType = genCopyType( refType->clone() );
276
277	// xxx - should we also generate void ?{}(E , int) and E ?{}(E , E)?
278	// right now these cases work, but that might change.
279
280	// xxx - Temporary: make these functions intrinsic so they codegen as C assignment.
281	// Really they're something of a cross between instrinsic and autogen, so should
282	// probably make a new linkage type
283	FunctionDecl *assignDecl = genFunc( "?=?", assignType, functionNesting, true );
284	FunctionDecl *ctorDecl = genFunc( "?{}", ctorType, functionNesting, true );
285	FunctionDecl *copyCtorDecl = genFunc( "?{}", copyCtorType, functionNesting, true );
286	FunctionDecl *dtorDecl = genFunc( "^?{}", dtorType, functionNesting, true );
287
288	// body is either return stmt or expr stmt
289	assignDecl->get_statements()->get_kids().push_back( new ReturnStmt( noLabels, genEnumAssign( assignType, assignDecl ) ) );
290	copyCtorDecl->get_statements()->get_kids().push_back( new ExprStmt( noLabels, genEnumAssign( copyCtorType, assignDecl ) ) );
291
292	declsToAdd.push_back( ctorDecl );
293	declsToAdd.push_back( copyCtorDecl );
294	declsToAdd.push_back( dtorDecl );
295	declsToAdd.push_back( assignDecl ); // assignment should come last since it uses copy constructor in return
296	}
297
298	/// generates a single struct member operation (constructor call, destructor call, assignment call)
299	void makeStructMemberOp( ObjectDecl * dstParam, Expression * src, DeclarationWithType * field, FunctionDecl * func, bool isDynamicLayout, bool forward = true ) {
300	InitTweak::InitExpander srcParam( src );
301
302	// assign to destination
303	Expression dstselect = new MemberExpr( field, new CastExpr( new VariableExpr( dstParam ), safe_dynamic_cast< ReferenceType >( dstParam->get_type() )->get_base()->clone() ) );
304	genImplicitCall( srcParam, dstselect, func->get_name(), back_inserter( func->get_statements()->get_kids() ), field, forward );
305	}
306
307	/// 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
308	template<typename Iterator>
309	void makeStructFunctionBody( Iterator member, Iterator end, FunctionDecl * func, bool isDynamicLayout, bool forward = true ) {
310	for ( ; member != end; ++member ) {
311	if ( DeclarationWithType field = dynamic_cast< DeclarationWithType >( *member ) ) { // otherwise some form of type declaration, e.g. Aggregate
312	// query the type qualifiers of this field and skip assigning it if it is marked const.
313	// If it is an array type, we need to strip off the array layers to find its qualifiers.
314	Type * type = field->get_type();
315	while ( ArrayType * at = dynamic_cast< ArrayType * >( type ) ) {
316	type = at->get_base();
317	}
318
319	if ( type->get_const() && func->get_name() == "?=?" ) {
320	// don't assign const members, but do construct/destruct
321	continue;
322	}
323
324	if ( field->get_name() == "" ) {
325	// don't assign to anonymous members
326	// xxx - this is a temporary fix. Anonymous members tie into
327	// our inheritance model. I think the correct way to handle this is to
328	// cast the structure to the type of the member and let the resolver
329	// figure out whether it's valid and have a pass afterwards that fixes
330	// the assignment to use pointer arithmetic with the offset of the
331	// member, much like how generic type members are handled.
332	continue;
333	}
334
335	assert( ! func->get_functionType()->get_parameters().empty() );
336	ObjectDecl * dstParam = dynamic_cast<ObjectDecl*>( func->get_functionType()->get_parameters().front() );
337	ObjectDecl * srcParam = NULL;
338	if ( func->get_functionType()->get_parameters().size() == 2 ) {
339	srcParam = dynamic_cast<ObjectDecl*>( func->get_functionType()->get_parameters().back() );
340	}
341	// srcParam may be NULL, in which case we have default ctor/dtor
342	assert( dstParam );
343
344	Expression *srcselect = srcParam ? new MemberExpr( field, new VariableExpr( srcParam ) ) : NULL;
345	makeStructMemberOp( dstParam, srcselect, field, func, isDynamicLayout, forward );
346	} // if
347	} // for
348	} // makeStructFunctionBody
349
350	/// generate the body of a constructor which takes parameters that match fields, e.g.
351	/// void ?{}(A , int) and void?{}(A , int, int) for a struct A which has two int fields.
352	template<typename Iterator>
353	void makeStructFieldCtorBody( Iterator member, Iterator end, FunctionDecl * func, bool isDynamicLayout ) {
354	FunctionType * ftype = func->get_functionType();
355	std::list<DeclarationWithType*> & params = ftype->get_parameters();
356	assert( params.size() >= 2 ); // should not call this function for default ctor, etc.
357
358	// skip 'this' parameter
359	ObjectDecl * dstParam = dynamic_cast<ObjectDecl*>( params.front() );
360	assert( dstParam );
361	std::list<DeclarationWithType*>::iterator parameter = params.begin()+1;
362	for ( ; member != end; ++member ) {
363	if ( DeclarationWithType * field = dynamic_cast<DeclarationWithType>( member ) ) {
364	if ( isUnnamedBitfield( dynamic_cast< ObjectDecl * > ( field ) ) ) {
365	// don't make a function whose parameter is an unnamed bitfield
366	continue;
367	} else if ( field->get_name() == "" ) {
368	// don't assign to anonymous members
369	// xxx - this is a temporary fix. Anonymous members tie into
370	// our inheritance model. I think the correct way to handle this is to
371	// cast the structure to the type of the member and let the resolver
372	// figure out whether it's valid and have a pass afterwards that fixes
373	// the assignment to use pointer arithmetic with the offset of the
374	// member, much like how generic type members are handled.
375	continue;
376	} else if ( parameter != params.end() ) {
377	// matching parameter, initialize field with copy ctor
378	Expression srcselect = new VariableExpr(parameter);
379	makeStructMemberOp( dstParam, srcselect, field, func, isDynamicLayout );
380	++parameter;
381	} else {
382	// no matching parameter, initialize field with default ctor
383	makeStructMemberOp( dstParam, NULL, field, func, isDynamicLayout );
384	}
385	}
386	}
387	}
388
389	/// generates struct constructors, destructor, and assignment functions
390	void makeStructFunctions( StructDecl aggregateDecl, StructInstType refType, unsigned int functionNesting, std::list< Declaration * > & declsToAdd, const std::vector< FuncData > & data ) {
391	// Builtins do not use autogeneration.
392	if ( aggregateDecl->get_linkage() == LinkageSpec::Builtin \|\|
393	aggregateDecl->get_linkage() == LinkageSpec::BuiltinC ) {
394	return;
395	}
396
397	// Make function polymorphic in same parameters as generic struct, if applicable
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 union)
400
401	// generate each of the functions based on the supplied FuncData objects
402	std::list< FunctionDecl * > newFuncs;
403	auto generator = makeFuncGenerator( aggregateDecl, refType, functionNesting, typeParams, back_inserter( newFuncs ) );
404	for ( const FuncData & d : data ) {
405	generator.gen( d, aggregateDecl->is_thread() \|\| aggregateDecl->is_monitor() );
406	}
407
408	// field ctors are only generated if default constructor and copy constructor are both generated
409	unsigned numCtors = std::count_if( newFuncs.begin(), newFuncs.end(), [](FunctionDecl * dcl) { return InitTweak::isConstructor( dcl->get_name() ); } );
410
411	if ( functionNesting == 0 ) {
412	// forward declare if top-level struct, so that
413	// type is complete as soon as its body ends
414	// Note: this is necessary if we want structs which contain
415	// generic (otype) structs as members.
416	for ( FunctionDecl * dcl : newFuncs ) {
417	addForwardDecl( dcl, declsToAdd );
418	}
419	}
420
421	for ( FunctionDecl * dcl : newFuncs ) {
422	// generate appropriate calls to member ctor, assignment
423	// destructor needs to do everything in reverse, so pass "forward" based on whether the function is a destructor
424	if ( ! InitTweak::isDestructor( dcl->get_name() ) ) {
425	makeStructFunctionBody( aggregateDecl->get_members().begin(), aggregateDecl->get_members().end(), dcl, isDynamicLayout );
426	} else {
427	makeStructFunctionBody( aggregateDecl->get_members().rbegin(), aggregateDecl->get_members().rend(), dcl, isDynamicLayout, false );
428	}
429	if ( InitTweak::isAssignment( dcl->get_name() ) ) {
430	// assignment needs to return a value
431	FunctionType * assignType = dcl->get_functionType();
432	assert( assignType->get_parameters().size() == 2 );
433	ObjectDecl * srcParam = safe_dynamic_cast< ObjectDecl * >( assignType->get_parameters().back() );
434	dcl->get_statements()->get_kids().push_back( new ReturnStmt( noLabels, new VariableExpr( srcParam ) ) );
435	}
436	declsToAdd.push_back( dcl );
437	}
438
439	// create constructors which take each member type as a parameter.
440	// for example, for struct A { int x, y; }; generate
441	// void ?{}(A , int) and void ?{}(A , int, int)
442	// Field constructors are only generated if default and copy constructor
443	// are generated, since they need access to both
444	if ( numCtors == 2 ) {
445	FunctionType * memCtorType = genDefaultType( refType );
446	cloneAll( typeParams, memCtorType->get_forall() );
447	for ( std::list<Declaration *>::iterator i = aggregateDecl->get_members().begin(); i != aggregateDecl->get_members().end(); ++i ) {
448	DeclarationWithType * member = dynamic_cast<DeclarationWithType >( i );
449	assert( member );
450	if ( isUnnamedBitfield( dynamic_cast< ObjectDecl * > ( member ) ) ) {
451	// don't make a function whose parameter is an unnamed bitfield
452	continue;
453	} else if ( member->get_name() == "" ) {
454	// don't assign to anonymous members
455	// xxx - this is a temporary fix. Anonymous members tie into
456	// our inheritance model. I think the correct way to handle this is to
457	// cast the structure to the type of the member and let the resolver
458	// figure out whether it's valid/choose the correct unnamed member
459	continue;
460	}
461	memCtorType->get_parameters().push_back( new ObjectDecl( member->get_name(), Type::StorageClasses(), LinkageSpec::Cforall, 0, member->get_type()->clone(), 0 ) );
462	FunctionDecl * ctor = genFunc( "?{}", memCtorType->clone(), functionNesting );
463	makeStructFieldCtorBody( aggregateDecl->get_members().begin(), aggregateDecl->get_members().end(), ctor, isDynamicLayout );
464	declsToAdd.push_back( ctor );
465	}
466	delete memCtorType;
467	}
468	}
469
470	/// generate a single union assignment expression (using memcpy)
471	template< typename OutputIterator >
472	void makeUnionFieldsAssignment( ObjectDecl * srcParam, ObjectDecl * dstParam, OutputIterator out ) {
473	UntypedExpr *copy = new UntypedExpr( new NameExpr( "__builtin_memcpy" ) );
474	copy->get_args().push_back( new AddressExpr( new VariableExpr( dstParam ) ) );
475	copy->get_args().push_back( new AddressExpr( new VariableExpr( srcParam ) ) );
476	copy->get_args().push_back( new SizeofExpr( srcParam->get_type()->clone() ) );
477	*out++ = new ExprStmt( noLabels, copy );
478	}
479
480	/// generates the body of a union assignment/copy constructor/field constructor
481	void makeUnionAssignBody( FunctionDecl * funcDecl ) {
482	FunctionType * ftype = funcDecl->get_functionType();
483	assert( ftype->get_parameters().size() == 2 );
484	ObjectDecl * dstParam = safe_dynamic_cast< ObjectDecl * >( ftype->get_parameters().front() );
485	ObjectDecl * srcParam = safe_dynamic_cast< ObjectDecl * >( ftype->get_parameters().back() );
486
487	makeUnionFieldsAssignment( srcParam, dstParam, back_inserter( funcDecl->get_statements()->get_kids() ) );
488	if ( InitTweak::isAssignment( funcDecl->get_name() ) ) {
489	// also generate return statement in assignment
490	funcDecl->get_statements()->get_kids().push_back( new ReturnStmt( noLabels, new VariableExpr( srcParam ) ) );
491	}
492	}
493
494	/// generates union constructors, destructors, and assignment operator
495	void makeUnionFunctions( UnionDecl aggregateDecl, UnionInstType refType, unsigned int functionNesting, std::list< Declaration * > & declsToAdd ) {
496	// Make function polymorphic in same parameters as generic union, if applicable
497	const std::list< TypeDecl* > & typeParams = aggregateDecl->get_parameters(); // List of type variables to be placed on the generated functions
498
499	// default ctor/dtor need only first parameter
500	// void ?{}(T ); void ^?{}(T );
501	FunctionType *ctorType = genDefaultType( refType );
502	FunctionType *dtorType = genDefaultType( refType );
503
504	// copy ctor needs both parameters
505	// void ?{}(T *, T);
506	FunctionType *copyCtorType = genCopyType( refType );
507
508	// assignment needs both and return value
509	// T ?=?(T *, T);
510	FunctionType *assignType = genAssignType( refType );
511
512	cloneAll( typeParams, ctorType->get_forall() );
513	cloneAll( typeParams, dtorType->get_forall() );
514	cloneAll( typeParams, copyCtorType->get_forall() );
515	cloneAll( typeParams, assignType->get_forall() );
516
517	// Routines at global scope marked "static" to prevent multiple definitions is separate translation units
518	// because each unit generates copies of the default routines for each aggregate.
519	FunctionDecl *assignDecl = genFunc( "?=?", assignType, functionNesting );
520	FunctionDecl *ctorDecl = genFunc( "?{}", ctorType, functionNesting );
521	FunctionDecl *copyCtorDecl = genFunc( "?{}", copyCtorType, functionNesting );
522	FunctionDecl *dtorDecl = genFunc( "^?{}", dtorType, functionNesting );
523
524	makeUnionAssignBody( assignDecl );
525
526	// body of assignment and copy ctor is the same
527	makeUnionAssignBody( copyCtorDecl );
528
529	// create a constructor which takes the first member type as a parameter.
530	// for example, for Union A { int x; double y; }; generate
531	// void ?{}(A *, int)
532	// This is to mimic C's behaviour which initializes the first member of the union.
533	std::list<Declaration *> memCtors;
534	for ( Declaration * member : aggregateDecl->get_members() ) {
535	if ( DeclarationWithType * field = dynamic_cast< DeclarationWithType * >( member ) ) {
536	ObjectDecl * srcParam = new ObjectDecl( "src", Type::StorageClasses(), LinkageSpec::Cforall, 0, field->get_type()->clone(), 0 );
537
538	FunctionType * memCtorType = ctorType->clone();
539	memCtorType->get_parameters().push_back( srcParam );
540	FunctionDecl * ctor = genFunc( "?{}", memCtorType, functionNesting );
541
542	makeUnionAssignBody( ctor );
543	memCtors.push_back( ctor );
544	// only generate a ctor for the first field
545	break;
546	}
547	}
548
549	declsToAdd.push_back( ctorDecl );
550	declsToAdd.push_back( copyCtorDecl );
551	declsToAdd.push_back( dtorDecl );
552	declsToAdd.push_back( assignDecl ); // assignment should come last since it uses copy constructor in return
553	declsToAdd.splice( declsToAdd.end(), memCtors );
554	}
555
556	AutogenerateRoutines::AutogenerateRoutines() {
557	// the order here determines the order that these functions are generated.
558	// assignment should come last since it uses copy constructor in return.
559	data.push_back( FuncData( "?{}", genDefaultType, constructable ) );
560	data.push_back( FuncData( "?{}", genCopyType, copyable ) );
561	data.push_back( FuncData( "^?{}", genDefaultType, destructable ) );
562	data.push_back( FuncData( "?=?", genAssignType, assignable ) );
563	}
564
565	void AutogenerateRoutines::visit( EnumDecl *enumDecl ) {
566	if ( ! enumDecl->get_members().empty() ) {
567	EnumInstType *enumInst = new EnumInstType( Type::Qualifiers(), enumDecl->get_name() );
568	// enumInst->set_baseEnum( enumDecl );
569	makeEnumFunctions( enumInst, functionNesting, declsToAddAfter );
570	}
571	}
572
573	void AutogenerateRoutines::visit( StructDecl *structDecl ) {
574	if ( structDecl->has_body() && structsDone.find( structDecl->get_name() ) == structsDone.end() ) {
575	StructInstType structInst( Type::Qualifiers(), structDecl->get_name() );
576	for ( TypeDecl * typeDecl : structDecl->get_parameters() ) {
577	// need to visit assertions so that they are added to the appropriate maps
578	acceptAll( typeDecl->get_assertions(), *this );
579	structInst.get_parameters().push_back( new TypeExpr( new TypeInstType( Type::Qualifiers(), typeDecl->get_name(), typeDecl ) ) );
580	}
581	structInst.set_baseStruct( structDecl );
582	makeStructFunctions( structDecl, &structInst, functionNesting, declsToAddAfter, data );
583	structsDone.insert( structDecl->get_name() );
584	} // if
585	}
586
587	void AutogenerateRoutines::visit( UnionDecl *unionDecl ) {
588	if ( ! unionDecl->get_members().empty() ) {
589	UnionInstType unionInst( Type::Qualifiers(), unionDecl->get_name() );
590	unionInst.set_baseUnion( unionDecl );
591	for ( TypeDecl * typeDecl : unionDecl->get_parameters() ) {
592	unionInst.get_parameters().push_back( new TypeExpr( new TypeInstType( Type::Qualifiers(), typeDecl->get_name(), typeDecl ) ) );
593	}
594	makeUnionFunctions( unionDecl, &unionInst, functionNesting, declsToAddAfter );
595	} // if
596	}
597
598	void AutogenerateRoutines::visit( TypeDecl *typeDecl ) {
599	TypeInstType *typeInst = new TypeInstType( Type::Qualifiers(), typeDecl->get_name(), false );
600	typeInst->set_baseType( typeDecl );
601	ObjectDecl *src = new ObjectDecl( "_src", Type::StorageClasses(), LinkageSpec::Cforall, nullptr, typeInst->clone(), nullptr );
602	ObjectDecl *dst = new ObjectDecl( "_dst", Type::StorageClasses(), LinkageSpec::Cforall, nullptr, new PointerType( Type::Qualifiers(), typeInst->clone() ), nullptr );
603
604	std::list< Statement * > stmts;
605	if ( typeDecl->get_base() ) {
606	// xxx - generate ctor/dtors for typedecls, e.g.
607	// otype T = int *;
608	UntypedExpr *assign = new UntypedExpr( new NameExpr( "?=?" ) );
609	assign->get_args().push_back( new CastExpr( new VariableExpr( dst ), new PointerType( Type::Qualifiers(), typeDecl->get_base()->clone() ) ) );
610	assign->get_args().push_back( new CastExpr( new VariableExpr( src ), typeDecl->get_base()->clone() ) );
611	stmts.push_back( new ReturnStmt( std::list< Label >(), assign ) );
612	} // if
613	FunctionType *type = new FunctionType( Type::Qualifiers(), false );
614	type->get_returnVals().push_back( new ObjectDecl( "", Type::StorageClasses(), LinkageSpec::Cforall, 0, typeInst, 0 ) );
615	type->get_parameters().push_back( dst );
616	type->get_parameters().push_back( src );
617	FunctionDecl *func = genFunc( "?=?", type, functionNesting );
618	func->get_statements()->get_kids() = stmts;
619	declsToAddAfter.push_back( func );
620	}
621
622	void addDecls( std::list< Declaration * > &declsToAdd, std::list< Statement * > &statements, std::list< Statement * >::iterator i ) {
623	for ( std::list< Declaration * >::iterator decl = declsToAdd.begin(); decl != declsToAdd.end(); ++decl ) {
624	statements.insert( i, new DeclStmt( noLabels, *decl ) );
625	} // for
626	declsToAdd.clear();
627	}
628
629	void AutogenerateRoutines::visit( FunctionType *) {
630	// ensure that we don't add assignment ops for types defined as part of the function
631	}
632
633	void AutogenerateRoutines::visit( PointerType *) {
634	// ensure that we don't add assignment ops for types defined as part of the pointer
635	}
636
637	void AutogenerateRoutines::visit( TraitDecl *) {
638	// ensure that we don't add assignment ops for types defined as part of the trait
639	}
640
641	template< typename StmtClass >
642	inline void AutogenerateRoutines::visitStatement( StmtClass *stmt ) {
643	std::set< std::string > oldStructs = structsDone;
644	addVisit( stmt, *this );
645	structsDone = oldStructs;
646	}
647
648	void AutogenerateRoutines::visit( FunctionDecl *functionDecl ) {
649	// record the existence of this function as appropriate
650	insert( functionDecl, constructable, InitTweak::isDefaultConstructor );
651	insert( functionDecl, assignable, InitTweak::isAssignment );
652	insert( functionDecl, copyable, InitTweak::isCopyConstructor );
653	insert( functionDecl, destructable, InitTweak::isDestructor );
654
655	maybeAccept( functionDecl->get_functionType(), *this );
656	functionNesting += 1;
657	maybeAccept( functionDecl->get_statements(), *this );
658	functionNesting -= 1;
659	}
660
661	void AutogenerateRoutines::visit( CompoundStmt *compoundStmt ) {
662	constructable.beginScope();
663	assignable.beginScope();
664	copyable.beginScope();
665	destructable.beginScope();
666	visitStatement( compoundStmt );
667	constructable.endScope();
668	assignable.endScope();
669	copyable.endScope();
670	destructable.endScope();
671	}
672
673	void AutogenerateRoutines::visit( SwitchStmt *switchStmt ) {
674	visitStatement( switchStmt );
675	}
676
677	void makeTupleFunctionBody( FunctionDecl * function ) {
678	FunctionType * ftype = function->get_functionType();
679	assertf( ftype->get_parameters().size() == 1 \|\| ftype->get_parameters().size() == 2, "too many parameters in generated tuple function" );
680
681	UntypedExpr * untyped = new UntypedExpr( new NameExpr( function->get_name() ) );
682
683	/// xxx - &* is used to make this easier for later passes to handle
684	untyped->get_args().push_back( new AddressExpr( UntypedExpr::createDeref( new VariableExpr( ftype->get_parameters().front() ) ) ) );
685	if ( ftype->get_parameters().size() == 2 ) {
686	untyped->get_args().push_back( new VariableExpr( ftype->get_parameters().back() ) );
687	}
688	function->get_statements()->get_kids().push_back( new ExprStmt( noLabels, untyped ) );
689	function->get_statements()->get_kids().push_back( new ReturnStmt( noLabels, UntypedExpr::createDeref( new VariableExpr( ftype->get_parameters().front() ) ) ) );
690	}
691
692	Type * AutogenTupleRoutines::mutate( TupleType * tupleType ) {
693	tupleType = safe_dynamic_cast< TupleType * >( Parent::mutate( tupleType ) );
694	std::string mangleName = SymTab::Mangler::mangleType( tupleType );
695	if ( seenTuples.find( mangleName ) != seenTuples.end() ) return tupleType;
696	seenTuples.insert( mangleName );
697
698	// T ?=?(T *, T);
699	FunctionType *assignType = genAssignType( tupleType );
700
701	// void ?{}(T ); void ^?{}(T );
702	FunctionType *ctorType = genDefaultType( tupleType );
703	FunctionType *dtorType = genDefaultType( tupleType );
704
705	// void ?{}(T *, T);
706	FunctionType *copyCtorType = genCopyType( tupleType );
707
708	std::set< TypeDecl* > done;
709	std::list< TypeDecl * > typeParams;
710	for ( Type * t : *tupleType ) {
711	if ( TypeInstType * ty = dynamic_cast< TypeInstType * >( t ) ) {
712	if ( ! done.count( ty->get_baseType() ) ) {
713	TypeDecl * newDecl = new TypeDecl( ty->get_baseType()->get_name(), Type::StorageClasses(), nullptr, TypeDecl::Any );
714	TypeInstType * inst = new TypeInstType( Type::Qualifiers(), newDecl->get_name(), newDecl );
715	newDecl->get_assertions().push_back( new FunctionDecl( "?=?", Type::StorageClasses(), LinkageSpec::Cforall, genAssignType( inst ), nullptr,
716	std::list< Attribute * >(), Type::FuncSpecifiers( Type::Inline ) ) );
717	newDecl->get_assertions().push_back( new FunctionDecl( "?{}", Type::StorageClasses(), LinkageSpec::Cforall, genDefaultType( inst ), nullptr,
718	std::list< Attribute * >(), Type::FuncSpecifiers( Type::Inline ) ) );
719	newDecl->get_assertions().push_back( new FunctionDecl( "?{}", Type::StorageClasses(), LinkageSpec::Cforall, genCopyType( inst ), nullptr,
720	std::list< Attribute * >(), Type::FuncSpecifiers( Type::Inline ) ) );
721	newDecl->get_assertions().push_back( new FunctionDecl( "^?{}", Type::StorageClasses(), LinkageSpec::Cforall, genDefaultType( inst ), nullptr,
722	std::list< Attribute * >(), Type::FuncSpecifiers( Type::Inline ) ) );
723	typeParams.push_back( newDecl );
724	done.insert( ty->get_baseType() );
725	}
726	}
727	}
728	cloneAll( typeParams, ctorType->get_forall() );
729	cloneAll( typeParams, dtorType->get_forall() );
730	cloneAll( typeParams, copyCtorType->get_forall() );
731	cloneAll( typeParams, assignType->get_forall() );
732
733	FunctionDecl *assignDecl = genFunc( "?=?", assignType, functionNesting );
734	FunctionDecl *ctorDecl = genFunc( "?{}", ctorType, functionNesting );
735	FunctionDecl *copyCtorDecl = genFunc( "?{}", copyCtorType, functionNesting );
736	FunctionDecl *dtorDecl = genFunc( "^?{}", dtorType, functionNesting );
737
738	makeTupleFunctionBody( assignDecl );
739	makeTupleFunctionBody( ctorDecl );
740	makeTupleFunctionBody( copyCtorDecl );
741	makeTupleFunctionBody( dtorDecl );
742
743	addDeclaration( ctorDecl );
744	addDeclaration( copyCtorDecl );
745	addDeclaration( dtorDecl );
746	addDeclaration( assignDecl ); // assignment should come last since it uses copy constructor in return
747
748	return tupleType;
749	}
750
751	DeclarationWithType * AutogenTupleRoutines::mutate( FunctionDecl *functionDecl ) {
752	functionDecl->set_functionType( maybeMutate( functionDecl->get_functionType(), *this ) );
753	functionNesting += 1;
754	functionDecl->set_statements( maybeMutate( functionDecl->get_statements(), *this ) );
755	functionNesting -= 1;
756	return functionDecl;
757	}
758
759	CompoundStmt * AutogenTupleRoutines::mutate( CompoundStmt *compoundStmt ) {
760	seenTuples.beginScope();
761	compoundStmt = safe_dynamic_cast< CompoundStmt * >( Parent::mutate( compoundStmt ) );
762	seenTuples.endScope();
763	return compoundStmt;
764	}
765	} // SymTab
766
767	// Local Variables: //
768	// tab-width: 4 //
769	// mode: c++ //
770	// compile-command: "make install" //
771	// End: //

Note: See TracBrowser for help on using the repository browser.

Download in other formats: