Context Navigation

source: src/GenPoly/GenPoly.cc @ 858350a

ADTast-experimental

Last change on this file since 858350a was c97b448, checked in by Andrew Beach <ajbeach@…>, 21 months ago
Added some box pass utilities that I believe are working and I don't want to look at all the time.
Property mode set to `100644`
File size: 32.5 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	// GenPoly.cc --
8	//
9	// Author : Richard C. Bilson
10	// Created On : Mon May 18 07:44:20 2015
11	// Last Modified By : Andrew Beach
12	// Last Modified On : Mon Oct 24 15:19:00 2022
13	// Update Count : 17
14	//
15
16	#include "GenPoly.h"
17
18	#include <cassert> // for assertf, assert
19	#include <iostream> // for operator<<, ostream, basic_os...
20	#include <iterator> // for back_insert_iterator, back_in...
21	#include <list> // for list, _List_iterator, list<>:...
22	#include <typeindex> // for type_index
23	#include <utility> // for pair
24	#include <vector> // for vector
25
26	#include "AST/Expr.hpp"
27	#include "AST/Type.hpp"
28	#include "AST/TypeSubstitution.hpp"
29	#include "GenPoly/ErasableScopedMap.h" // for ErasableScopedMap<>::const_it...
30	#include "ResolvExpr/typeops.h" // for flatten
31	#include "SynTree/Constant.h" // for Constant
32	#include "SynTree/Expression.h" // for Expression, TypeExpr, Constan...
33	#include "SynTree/Type.h" // for Type, StructInstType, UnionIn...
34	#include "SynTree/TypeSubstitution.h" // for TypeSubstitution
35
36	using namespace std;
37
38	namespace GenPoly {
39	namespace {
40	/// Checks a parameter list for polymorphic parameters; will substitute according to env if present
41	bool hasPolyParams( std::list< Expression* >& params, const TypeSubstitution *env ) {
42	for ( std::list< Expression* >::iterator param = params.begin(); param != params.end(); ++param ) {
43	TypeExpr paramType = dynamic_cast< TypeExpr >( *param );
44	assertf(paramType, "Aggregate parameters should be type expressions");
45	if ( isPolyType( paramType->get_type(), env ) ) return true;
46	}
47	return false;
48	}
49
50	bool hasPolyParams( const std::vector<ast::ptr<ast::Expr>> & params, const ast::TypeSubstitution * env) {
51	for (auto &param : params) {
52	auto paramType = param.strict_as<ast::TypeExpr>();
53	if (isPolyType(paramType->type, env)) return true;
54	}
55	return false;
56	}
57
58	/// Checks a parameter list for polymorphic parameters from tyVars; will substitute according to env if present
59	bool hasPolyParams( std::list< Expression* >& params, const TyVarMap &tyVars, const TypeSubstitution *env ) {
60	for ( std::list< Expression* >::iterator param = params.begin(); param != params.end(); ++param ) {
61	TypeExpr paramType = dynamic_cast< TypeExpr >( *param );
62	assertf(paramType, "Aggregate parameters should be type expressions");
63	if ( isPolyType( paramType->get_type(), tyVars, env ) ) return true;
64	}
65	return false;
66	}
67
68	/// Checks a parameter list for dynamic-layout parameters from tyVars; will substitute according to env if present
69	bool hasDynParams( std::list< Expression* >& params, const TyVarMap &tyVars, const TypeSubstitution *env ) {
70	for ( std::list< Expression* >::iterator param = params.begin(); param != params.end(); ++param ) {
71	TypeExpr paramType = dynamic_cast< TypeExpr >( *param );
72	assertf(paramType, "Aggregate parameters should be type expressions");
73	if ( isDynType( paramType->get_type(), tyVars, env ) ) return true;
74	}
75	return false;
76	}
77
78	bool hasDynParams(
79	const std::vector<ast::ptr<ast::Expr>> & params,
80	const TypeVarMap & typeVars,
81	const ast::TypeSubstitution * subst ) {
82	for ( ast::ptr<ast::Expr> const & paramExpr : params ) {
83	auto param = paramExpr.as<ast::TypeExpr>();
84	assertf( param, "Aggregate parameters should be type expressions." );
85	if ( isDynType( param->type.get(), typeVars, subst ) ) {
86	return true;
87	}
88	}
89	return false;
90	}
91
92	/// Checks a parameter list for inclusion of polymorphic parameters; will substitute according to env if present
93	bool includesPolyParams( std::list< Expression* >& params, const TypeSubstitution *env ) {
94	for ( std::list< Expression* >::iterator param = params.begin(); param != params.end(); ++param ) {
95	TypeExpr paramType = dynamic_cast< TypeExpr >( *param );
96	assertf(paramType, "Aggregate parameters should be type expressions");
97	if ( includesPolyType( paramType->get_type(), env ) ) return true;
98	}
99	return false;
100	}
101
102	/// Checks a parameter list for inclusion of polymorphic parameters from tyVars; will substitute according to env if present
103	bool includesPolyParams( std::list< Expression* >& params, const TyVarMap &tyVars, const TypeSubstitution *env ) {
104	for ( std::list< Expression* >::iterator param = params.begin(); param != params.end(); ++param ) {
105	TypeExpr paramType = dynamic_cast< TypeExpr >( *param );
106	assertf(paramType, "Aggregate parameters should be type expressions");
107	if ( includesPolyType( paramType->get_type(), tyVars, env ) ) return true;
108	}
109	return false;
110	}
111	}
112
113	Type* replaceTypeInst( Type* type, const TypeSubstitution* env ) {
114	if ( ! env ) return type;
115	if ( TypeInstType typeInst = dynamic_cast< TypeInstType >( type ) ) {
116	Type *newType = env->lookup( typeInst->get_name() );
117	if ( newType ) return newType;
118	}
119	return type;
120	}
121
122	const Type* replaceTypeInst( const Type* type, const TypeSubstitution* env ) {
123	if ( ! env ) return type;
124	if ( auto typeInst = dynamic_cast< const TypeInstType* >( type ) ) {
125	Type *newType = env->lookup( typeInst->get_name() );
126	if ( newType ) return newType;
127	}
128	return type;
129	}
130
131	const ast::Type * replaceTypeInst(const ast::Type * type, const ast::TypeSubstitution * env) {
132	if (!env) return type;
133	if ( auto typeInst = dynamic_cast<const ast::TypeInstType*>(type) ) {
134	auto newType = env->lookup(typeInst);
135	if (newType) return newType;
136	}
137	return type;
138	}
139
140	Type isPolyType( Type type, const TypeSubstitution *env ) {
141	type = replaceTypeInst( type, env );
142
143	if ( dynamic_cast< TypeInstType * >( type ) ) {
144	return type;
145	} else if ( ArrayType * arrayType = dynamic_cast< ArrayType * >( type ) ) {
146	return isPolyType( arrayType->base, env );
147	} else if ( StructInstType structType = dynamic_cast< StructInstType >( type ) ) {
148	if ( hasPolyParams( structType->get_parameters(), env ) ) return type;
149	} else if ( UnionInstType unionType = dynamic_cast< UnionInstType >( type ) ) {
150	if ( hasPolyParams( unionType->get_parameters(), env ) ) return type;
151	}
152	return 0;
153	}
154
155	const ast::Type * isPolyType(const ast::Type * type, const ast::TypeSubstitution * env) {
156	type = replaceTypeInst( type, env );
157
158	if ( dynamic_cast< const ast::TypeInstType * >( type ) ) {
159	return type;
160	} else if ( auto arrayType = dynamic_cast< const ast::ArrayType * >( type ) ) {
161	return isPolyType( arrayType->base, env );
162	} else if ( auto structType = dynamic_cast< const ast::StructInstType* >( type ) ) {
163	if ( hasPolyParams( structType->params, env ) ) return type;
164	} else if ( auto unionType = dynamic_cast< const ast::UnionInstType* >( type ) ) {
165	if ( hasPolyParams( unionType->params, env ) ) return type;
166	}
167	return 0;
168	}
169
170	Type isPolyType( Type type, const TyVarMap &tyVars, const TypeSubstitution *env ) {
171	type = replaceTypeInst( type, env );
172
173	if ( TypeInstType typeInst = dynamic_cast< TypeInstType >( type ) ) {
174	if ( tyVars.contains( typeInst->get_name() ) ) {
175	return type;
176	}
177	} else if ( ArrayType * arrayType = dynamic_cast< ArrayType * >( type ) ) {
178	return isPolyType( arrayType->base, tyVars, env );
179	} else if ( StructInstType structType = dynamic_cast< StructInstType >( type ) ) {
180	if ( hasPolyParams( structType->get_parameters(), tyVars, env ) ) return type;
181	} else if ( UnionInstType unionType = dynamic_cast< UnionInstType >( type ) ) {
182	if ( hasPolyParams( unionType->get_parameters(), tyVars, env ) ) return type;
183	}
184	return 0;
185	}
186
187	const ast::Type * isPolyType(const ast::Type * type, const TyVarMap & tyVars, const ast::TypeSubstitution * env) {
188	type = replaceTypeInst( type, env );
189
190	if ( auto typeInst = dynamic_cast< const ast::TypeInstType * >( type ) ) {
191	if ( tyVars.contains( typeInst->typeString() ) ) return type;
192	} else if ( auto arrayType = dynamic_cast< const ast::ArrayType * >( type ) ) {
193	return isPolyType( arrayType->base, env );
194	} else if ( auto structType = dynamic_cast< const ast::StructInstType* >( type ) ) {
195	if ( hasPolyParams( structType->params, env ) ) return type;
196	} else if ( auto unionType = dynamic_cast< const ast::UnionInstType* >( type ) ) {
197	if ( hasPolyParams( unionType->params, env ) ) return type;
198	}
199	return nullptr;
200	}
201
202	const ast::Type * isPolyType( const ast::Type * type,
203	const TypeVarMap & typeVars, const ast::TypeSubstitution * subst ) {
204	type = replaceTypeInst( type, subst );
205
206	if ( auto inst = dynamic_cast< const ast::TypeInstType * >( type ) ) {
207	if ( typeVars.contains( *inst ) ) return type;
208	} else if ( auto array = dynamic_cast< const ast::ArrayType * >( type ) ) {
209	return isPolyType( array->base, subst );
210	} else if ( auto sue = dynamic_cast< const ast::StructInstType * >( type ) ) {
211	if ( hasPolyParams( sue->params, subst ) ) return type;
212	} else if ( auto sue = dynamic_cast< const ast::UnionInstType * >( type ) ) {
213	if ( hasPolyParams( sue->params, subst ) ) return type;
214	}
215	return nullptr;
216	}
217
218	ReferenceToType isDynType( Type type, const TyVarMap &tyVars, const TypeSubstitution *env ) {
219	type = replaceTypeInst( type, env );
220
221	if ( TypeInstType typeInst = dynamic_cast< TypeInstType >( type ) ) {
222	auto var = tyVars.find( typeInst->get_name() );
223	if ( var != tyVars.end() && var->second.isComplete ) {
224	return typeInst;
225	}
226	} else if ( StructInstType structType = dynamic_cast< StructInstType >( type ) ) {
227	if ( hasDynParams( structType->get_parameters(), tyVars, env ) ) return structType;
228	} else if ( UnionInstType unionType = dynamic_cast< UnionInstType >( type ) ) {
229	if ( hasDynParams( unionType->get_parameters(), tyVars, env ) ) return unionType;
230	}
231	return 0;
232	}
233
234	const ast::BaseInstType * isDynType(
235	const ast::Type * type, const TypeVarMap & typeVars,
236	const ast::TypeSubstitution * subst ) {
237	type = replaceTypeInst( type, subst );
238
239	if ( auto inst = dynamic_cast<ast::TypeInstType const *>( type ) ) {
240	auto var = typeVars.find( *inst );
241	if ( var != typeVars.end() && var->second.isComplete ) {
242	return inst;
243	}
244	} else if ( auto inst = dynamic_cast<ast::StructInstType const *>( type ) ) {
245	if ( hasDynParams( inst->params, typeVars, subst ) ) {
246	return inst;
247	}
248	} else if ( auto inst = dynamic_cast<ast::UnionInstType const *>( type ) ) {
249	if ( hasDynParams( inst->params, typeVars, subst ) ) {
250	return inst;
251	}
252	}
253	return nullptr;
254	}
255
256	ReferenceToType isDynRet( FunctionType function, const TyVarMap &forallTypes ) {
257	if ( function->get_returnVals().empty() ) return 0;
258
259	return (ReferenceToType*)isDynType( function->get_returnVals().front()->get_type(), forallTypes );
260	}
261
262	const ast::BaseInstType *isDynRet(
263	const ast::FunctionType * type, const TypeVarMap & typeVars ) {
264	if ( type->returns.empty() ) return nullptr;
265
266	return isDynType( type->returns.front(), typeVars );
267	}
268
269	ReferenceToType isDynRet( FunctionType function ) {
270	if ( function->get_returnVals().empty() ) return 0;
271
272	TyVarMap forallTypes( TypeDecl::Data{} );
273	makeTyVarMap( function, forallTypes );
274	return (ReferenceToType*)isDynType( function->get_returnVals().front()->get_type(), forallTypes );
275	}
276
277	const ast::BaseInstType isDynRet( const ast::FunctionType func ) {
278	if ( func->returns.empty() ) return nullptr;
279
280	TypeVarMap forallTypes = { ast::TypeData() };
281	makeTypeVarMap( func, forallTypes );
282	return isDynType( func->returns.front(), forallTypes );
283	}
284
285	bool needsAdapter( FunctionType *adaptee, const TyVarMap &tyVars ) {
286	// if ( ! adaptee->get_returnVals().empty() && isPolyType( adaptee->get_returnVals().front()->get_type(), tyVars ) ) {
287	// return true;
288	// } // if
289	if ( isDynRet( adaptee, tyVars ) ) return true;
290
291	for ( std::list< DeclarationWithType* >::const_iterator innerArg = adaptee->get_parameters().begin(); innerArg != adaptee->get_parameters().end(); ++innerArg ) {
292	// if ( isPolyType( (*innerArg)->get_type(), tyVars ) ) {
293	if ( isDynType( (*innerArg)->get_type(), tyVars ) ) {
294	return true;
295	} // if
296	} // for
297	return false;
298	}
299
300	bool needsAdapter(
301	ast::FunctionType const * adaptee, const TypeVarMap & typeVars ) {
302	if ( isDynRet( adaptee, typeVars ) ) return true;
303
304	for ( auto param : adaptee->params ) {
305	if ( isDynType( param, typeVars ) ) {
306	return true;
307	}
308	}
309	return false;
310	}
311
312	Type isPolyPtr( Type type, const TypeSubstitution *env ) {
313	type = replaceTypeInst( type, env );
314
315	if ( PointerType ptr = dynamic_cast< PointerType >( type ) ) {
316	return isPolyType( ptr->get_base(), env );
317	}
318	return 0;
319	}
320
321	Type isPolyPtr( Type type, const TyVarMap &tyVars, const TypeSubstitution *env ) {
322	type = replaceTypeInst( type, env );
323
324	if ( PointerType ptr = dynamic_cast< PointerType >( type ) ) {
325	return isPolyType( ptr->get_base(), tyVars, env );
326	}
327	return 0;
328	}
329
330	const ast::Type * isPolyPtr(
331	const ast::Type * type, const TypeVarMap & typeVars,
332	const ast::TypeSubstitution * typeSubs ) {
333	type = replaceTypeInst( type, typeSubs );
334
335	if ( auto * ptr = dynamic_cast<ast::PointerType const *>( type ) ) {
336	return isPolyType( ptr->base, typeVars, typeSubs );
337	}
338	return nullptr;
339	}
340
341	Type * hasPolyBase( Type type, int levels, const TypeSubstitution *env ) {
342	int dummy;
343	if ( ! levels ) { levels = &dummy; }
344	*levels = 0;
345
346	while ( true ) {
347	type = replaceTypeInst( type, env );
348
349	if ( PointerType ptr = dynamic_cast< PointerType >( type ) ) {
350	type = ptr->get_base();
351	++(*levels);
352	} else break;
353	}
354
355	return isPolyType( type, env );
356	}
357
358	Type * hasPolyBase( Type type, const TyVarMap &tyVars, int levels, const TypeSubstitution *env ) {
359	int dummy;
360	if ( ! levels ) { levels = &dummy; }
361	*levels = 0;
362
363	while ( true ) {
364	type = replaceTypeInst( type, env );
365
366	if ( PointerType ptr = dynamic_cast< PointerType >( type ) ) {
367	type = ptr->get_base();
368	++(*levels);
369	} else break;
370	}
371
372	return isPolyType( type, tyVars, env );
373	}
374
375	ast::Type const * hasPolyBase(
376	ast::Type const * type, const TypeVarMap & typeVars,
377	int * levels, const ast::TypeSubstitution * subst ) {
378	int level_count = 0;
379
380	while ( true ) {
381	type = replaceTypeInst( type, subst );
382
383	if ( auto ptr = dynamic_cast<ast::PointerType const *>( type ) ) {
384	type = ptr->base;
385	++level_count;
386	} else {
387	break;
388	}
389	}
390
391	if ( nullptr != levels ) { *levels = level_count; }
392	return isPolyType( type, typeVars, subst );
393	}
394
395	bool includesPolyType( Type type, const TypeSubstitution env ) {
396	type = replaceTypeInst( type, env );
397
398	if ( dynamic_cast< TypeInstType * >( type ) ) {
399	return true;
400	} else if ( PointerType pointerType = dynamic_cast< PointerType >( type ) ) {
401	if ( includesPolyType( pointerType->get_base(), env ) ) return true;
402	} else if ( StructInstType structType = dynamic_cast< StructInstType >( type ) ) {
403	if ( includesPolyParams( structType->get_parameters(), env ) ) return true;
404	} else if ( UnionInstType unionType = dynamic_cast< UnionInstType >( type ) ) {
405	if ( includesPolyParams( unionType->get_parameters(), env ) ) return true;
406	}
407	return false;
408	}
409
410	bool includesPolyType( Type type, const TyVarMap &tyVars, const TypeSubstitution env ) {
411	type = replaceTypeInst( type, env );
412
413	if ( TypeInstType typeInstType = dynamic_cast< TypeInstType >( type ) ) {
414	if ( tyVars.contains( typeInstType->get_name() ) ) {
415	return true;
416	}
417	} else if ( PointerType pointerType = dynamic_cast< PointerType >( type ) ) {
418	if ( includesPolyType( pointerType->get_base(), tyVars, env ) ) return true;
419	} else if ( StructInstType structType = dynamic_cast< StructInstType >( type ) ) {
420	if ( includesPolyParams( structType->get_parameters(), tyVars, env ) ) return true;
421	} else if ( UnionInstType unionType = dynamic_cast< UnionInstType >( type ) ) {
422	if ( includesPolyParams( unionType->get_parameters(), tyVars, env ) ) return true;
423	}
424	return false;
425	}
426
427	FunctionType * getFunctionType( Type *ty ) {
428	PointerType *ptrType;
429	if ( ( ptrType = dynamic_cast< PointerType* >( ty ) ) ) {
430	return dynamic_cast< FunctionType* >( ptrType->get_base() ); // pointer if FunctionType, NULL otherwise
431	} else {
432	return dynamic_cast< FunctionType* >( ty ); // pointer if FunctionType, NULL otherwise
433	}
434	}
435
436	const ast::FunctionType * getFunctionType( const ast::Type * ty ) {
437	if ( auto pty = dynamic_cast< const ast::PointerType * >( ty ) ) {
438	return pty->base.as< ast::FunctionType >();
439	} else {
440	return dynamic_cast< const ast::FunctionType * >( ty );
441	}
442	}
443
444	VariableExpr * getBaseVar( Expression expr, int levels ) {
445	int dummy;
446	if ( ! levels ) { levels = &dummy; }
447	*levels = 0;
448
449	while ( true ) {
450	if ( VariableExpr varExpr = dynamic_cast< VariableExpr >( expr ) ) {
451	return varExpr;
452	} else if ( MemberExpr memberExpr = dynamic_cast< MemberExpr >( expr ) ) {
453	expr = memberExpr->get_aggregate();
454	} else if ( AddressExpr addressExpr = dynamic_cast< AddressExpr >( expr ) ) {
455	expr = addressExpr->get_arg();
456	} else if ( UntypedExpr untypedExpr = dynamic_cast< UntypedExpr >( expr ) ) {
457	// look for compiler-inserted dereference operator
458	NameExpr fn = dynamic_cast< NameExpr >( untypedExpr->get_function() );
459	if ( ! fn \|\| fn->get_name() != std::string("*?") ) return 0;
460	expr = *untypedExpr->begin_args();
461	} else if ( CommaExpr commaExpr = dynamic_cast< CommaExpr >( expr ) ) {
462	// copy constructors insert comma exprs, look at second argument which contains the variable
463	expr = commaExpr->get_arg2();
464	continue;
465	} else if ( ConditionalExpr * condExpr = dynamic_cast< ConditionalExpr * >( expr ) ) {
466	int lvl1;
467	int lvl2;
468	VariableExpr * var1 = getBaseVar( condExpr->get_arg2(), &lvl1 );
469	VariableExpr * var2 = getBaseVar( condExpr->get_arg3(), &lvl2 );
470	if ( lvl1 == lvl2 && var1 && var2 && var1->get_var() == var2->get_var() ) {
471	*levels = lvl1;
472	return var1;
473	}
474	break;
475	} else break;
476
477	++(*levels);
478	}
479
480	return 0;
481	}
482
483	namespace {
484	/// Checks if is a pointer to D
485	template<typename D, typename B>
486	bool is( const B* p ) { return type_index{typeid(D)} == type_index{typeid(*p)}; }
487
488	/// Converts to a pointer to D without checking for safety
489	template<typename D, typename B>
490	inline D* as( B* p ) { return reinterpret_cast<D*>(p); }
491
492	template<typename D, typename B>
493	inline D const * as( B const * p ) {
494	return reinterpret_cast<D const *>( p );
495	}
496
497	/// Flattens a declaration list
498	template<typename Output>
499	void flattenList( list< DeclarationWithType* > src, Output out ) {
500	for ( DeclarationWithType* decl : src ) {
501	ResolvExpr::flatten( decl->get_type(), out );
502	}
503	}
504
505	/// Flattens a list of types
506	template<typename Output>
507	void flattenList( list< Type* > src, Output out ) {
508	for ( Type* ty : src ) {
509	ResolvExpr::flatten( ty, out );
510	}
511	}
512
513	/// Flattens a list of types.
514	// There is another flattenList in Unify.
515	void flattenList( vector<ast::ptr<ast::Type>> const & src,
516	vector<ast::ptr<ast::Type>> & out ) {
517	for ( auto const & type : src ) {
518	ResolvExpr::flatten( type, out );
519	}
520	}
521
522	/// Checks if two lists of parameters are equal up to polymorphic substitution.
523	bool paramListsPolyCompatible( const list< Expression* >& aparams, const list< Expression* >& bparams ) {
524	if ( aparams.size() != bparams.size() ) return false;
525
526	for ( list< Expression* >::const_iterator at = aparams.begin(), bt = bparams.begin();
527	at != aparams.end(); ++at, ++bt ) {
528	TypeExpr aparam = dynamic_cast< TypeExpr >(*at);
529	assertf(aparam, "Aggregate parameters should be type expressions");
530	TypeExpr bparam = dynamic_cast< TypeExpr >(*bt);
531	assertf(bparam, "Aggregate parameters should be type expressions");
532
533	// xxx - might need to let VoidType be a wildcard here too; could have some voids
534	// stuffed in for dtype-statics.
535	// if ( is<VoidType>( aparam->get_type() ) \|\| is<VoidType>( bparam->get_type() ) ) continue;
536	if ( ! typesPolyCompatible( aparam->get_type(), bparam->get_type() ) ) return false;
537	}
538
539	return true;
540	}
541
542	bool paramListsPolyCompatible(
543	std::vector<ast::ptr<ast::Expr>> const & lparams,
544	std::vector<ast::ptr<ast::Expr>> const & rparams ) {
545	if ( lparams.size() != rparams.size() ) {
546	return false;
547	}
548
549	for ( auto lparam = lparams.begin(), rparam = rparams.begin() ;
550	lparam != lparams.end() ; ++lparam, ++rparam ) {
551	ast::TypeExpr const * lexpr = lparam->as<ast::TypeExpr>();
552	assertf( lexpr, "Aggregate parameters should be type expressions" );
553	ast::TypeExpr const * rexpr = rparam->as<ast::TypeExpr>();
554	assertf( rexpr, "Aggregate parameters should be type expressions" );
555
556	// xxx - might need to let VoidType be a wildcard here too; could have some voids
557	// stuffed in for dtype-statics.
558	// if ( is<VoidType>( lexpr->type() ) \|\| is<VoidType>( bparam->get_type() ) ) continue;
559	if ( !typesPolyCompatible( lexpr->type, rexpr->type ) ) {
560	return false;
561	}
562	}
563
564	return true;
565	}
566	}
567
568	bool typesPolyCompatible( Type a, Type b ) {
569	type_index aid{ typeid(*a) };
570	// polymorphic types always match
571	if ( aid == type_index{typeid(TypeInstType)} ) return true;
572
573	type_index bid{ typeid(*b) };
574	// polymorphic types always match
575	if ( bid == type_index{typeid(TypeInstType)} ) return true;
576
577	// can't match otherwise if different types
578	if ( aid != bid ) return false;
579
580	// recurse through type structure (conditions borrowed from Unify.cc)
581	if ( aid == type_index{typeid(BasicType)} ) {
582	return as<BasicType>(a)->get_kind() == as<BasicType>(b)->get_kind();
583	} else if ( aid == type_index{typeid(PointerType)} ) {
584	PointerType ap = as<PointerType>(a), bp = as<PointerType>(b);
585
586	// void pointers should match any other pointer type
587	return is<VoidType>( ap->get_base() ) \|\| is<VoidType>( bp->get_base() )
588	\|\| typesPolyCompatible( ap->get_base(), bp->get_base() );
589	} else if ( aid == type_index{typeid(ReferenceType)} ) {
590	ReferenceType ap = as<ReferenceType>(a), bp = as<ReferenceType>(b);
591	return is<VoidType>( ap->get_base() ) \|\| is<VoidType>( bp->get_base() )
592	\|\| typesPolyCompatible( ap->get_base(), bp->get_base() );
593	} else if ( aid == type_index{typeid(ArrayType)} ) {
594	ArrayType aa = as<ArrayType>(a), ba = as<ArrayType>(b);
595
596	if ( aa->get_isVarLen() ) {
597	if ( ! ba->get_isVarLen() ) return false;
598	} else {
599	if ( ba->get_isVarLen() ) return false;
600
601	ConstantExpr ad = dynamic_cast<ConstantExpr>( aa->get_dimension() );
602	ConstantExpr bd = dynamic_cast<ConstantExpr>( ba->get_dimension() );
603	if ( ad && bd
604	&& ad->get_constant()->get_value() != bd->get_constant()->get_value() )
605	return false;
606	}
607
608	return typesPolyCompatible( aa->get_base(), ba->get_base() );
609	} else if ( aid == type_index{typeid(FunctionType)} ) {
610	FunctionType af = as<FunctionType>(a), bf = as<FunctionType>(b);
611
612	vector<Type*> aparams, bparams;
613	flattenList( af->get_parameters(), back_inserter( aparams ) );
614	flattenList( bf->get_parameters(), back_inserter( bparams ) );
615	if ( aparams.size() != bparams.size() ) return false;
616
617	vector<Type*> areturns, breturns;
618	flattenList( af->get_returnVals(), back_inserter( areturns ) );
619	flattenList( bf->get_returnVals(), back_inserter( breturns ) );
620	if ( areturns.size() != breturns.size() ) return false;
621
622	for ( unsigned i = 0; i < aparams.size(); ++i ) {
623	if ( ! typesPolyCompatible( aparams[i], bparams[i] ) ) return false;
624	}
625	for ( unsigned i = 0; i < areturns.size(); ++i ) {
626	if ( ! typesPolyCompatible( areturns[i], breturns[i] ) ) return false;
627	}
628	return true;
629	} else if ( aid == type_index{typeid(StructInstType)} ) {
630	StructInstType aa = as<StructInstType>(a), ba = as<StructInstType>(b);
631
632	if ( aa->get_name() != ba->get_name() ) return false;
633	return paramListsPolyCompatible( aa->get_parameters(), ba->get_parameters() );
634	} else if ( aid == type_index{typeid(UnionInstType)} ) {
635	UnionInstType aa = as<UnionInstType>(a), ba = as<UnionInstType>(b);
636
637	if ( aa->get_name() != ba->get_name() ) return false;
638	return paramListsPolyCompatible( aa->get_parameters(), ba->get_parameters() );
639	} else if ( aid == type_index{typeid(EnumInstType)} ) {
640	return as<EnumInstType>(a)->get_name() == as<EnumInstType>(b)->get_name();
641	} else if ( aid == type_index{typeid(TraitInstType)} ) {
642	return as<TraitInstType>(a)->get_name() == as<TraitInstType>(b)->get_name();
643	} else if ( aid == type_index{typeid(TupleType)} ) {
644	TupleType at = as<TupleType>(a), bt = as<TupleType>(b);
645
646	vector<Type*> atypes, btypes;
647	flattenList( at->get_types(), back_inserter( atypes ) );
648	flattenList( bt->get_types(), back_inserter( btypes ) );
649	if ( atypes.size() != btypes.size() ) return false;
650
651	for ( unsigned i = 0; i < atypes.size(); ++i ) {
652	if ( ! typesPolyCompatible( atypes[i], btypes[i] ) ) return false;
653	}
654	return true;
655	} else return true; // VoidType, VarArgsType, ZeroType & OneType just need the same type
656	}
657
658	bool typesPolyCompatible( ast::Type const * lhs, ast::Type const * rhs ) {
659	type_index const lid = typeid(*lhs);
660
661	// Polymorphic types always match:
662	if ( type_index(typeid(ast::TypeInstType)) == lid ) return true;
663
664	type_index const rid = typeid(*rhs);
665	if ( type_index(typeid(ast::TypeInstType)) == rid ) return true;
666
667	// All other types only match if they are the same type:
668	if ( lid != rid ) return false;
669
670	// So remaining types can be examined case by case.
671	// Recurse through type structure (conditions borrowed from Unify.cc).
672
673	if ( type_index(typeid(ast::BasicType)) == lid ) {
674	return as<ast::BasicType>(lhs)->kind == as<ast::BasicType>(rhs)->kind;
675	} else if ( type_index(typeid(ast::PointerType)) == lid ) {
676	ast::PointerType const * l = as<ast::PointerType>(lhs);
677	ast::PointerType const * r = as<ast::PointerType>(rhs);
678
679	// void pointers should match any other pointer type.
680	return is<ast::VoidType>( l->base.get() )
681	\|\| is<ast::VoidType>( r->base.get() )
682	\|\| typesPolyCompatible( l->base.get(), r->base.get() );
683	} else if ( type_index(typeid(ast::ReferenceType)) == lid ) {
684	ast::ReferenceType const * l = as<ast::ReferenceType>(lhs);
685	ast::ReferenceType const * r = as<ast::ReferenceType>(rhs);
686
687	// void references should match any other reference type.
688	return is<ast::VoidType>( l->base.get() )
689	\|\| is<ast::VoidType>( r->base.get() )
690	\|\| typesPolyCompatible( l->base.get(), r->base.get() );
691	} else if ( type_index(typeid(ast::ArrayType)) == lid ) {
692	ast::ArrayType const * l = as<ast::ArrayType>(lhs);
693	ast::ArrayType const * r = as<ast::ArrayType>(rhs);
694
695	if ( l->isVarLen ) {
696	if ( !r->isVarLen ) return false;
697	} else {
698	if ( r->isVarLen ) return false;
699
700	auto lc = l->dimension.as<ast::ConstantExpr>();
701	auto rc = r->dimension.as<ast::ConstantExpr>();
702	if ( lc && rc && lc->intValue() != rc->intValue() ) {
703	return false;
704	}
705	}
706
707	return typesPolyCompatible( l->base.get(), r->base.get() );
708	} else if ( type_index(typeid(ast::FunctionType)) == lid ) {
709	ast::FunctionType const * l = as<ast::FunctionType>(lhs);
710	ast::FunctionType const * r = as<ast::FunctionType>(rhs);
711
712	std::vector<ast::ptr<ast::Type>> lparams, rparams;
713	flattenList( l->params, lparams );
714	flattenList( r->params, rparams );
715	if ( lparams.size() != rparams.size() ) return false;
716	for ( unsigned i = 0; i < lparams.size(); ++i ) {
717	if ( !typesPolyCompatible( lparams[i], rparams[i] ) ) return false;
718	}
719
720	std::vector<ast::ptr<ast::Type>> lrets, rrets;
721	flattenList( l->returns, lrets );
722	flattenList( r->returns, rrets );
723	if ( lrets.size() != rrets.size() ) return false;
724	for ( unsigned i = 0; i < lrets.size(); ++i ) {
725	if ( !typesPolyCompatible( lrets[i], rrets[i] ) ) return false;
726	}
727	return true;
728	} else if ( type_index(typeid(ast::StructInstType)) == lid ) {
729	ast::StructInstType const * l = as<ast::StructInstType>(lhs);
730	ast::StructInstType const * r = as<ast::StructInstType>(rhs);
731
732	if ( l->name != r->name ) return false;
733	return paramListsPolyCompatible( l->params, r->params );
734	} else if ( type_index(typeid(ast::UnionInstType)) == lid ) {
735	ast::UnionInstType const * l = as<ast::UnionInstType>(lhs);
736	ast::UnionInstType const * r = as<ast::UnionInstType>(rhs);
737
738	if ( l->name != r->name ) return false;
739	return paramListsPolyCompatible( l->params, r->params );
740	} else if ( type_index(typeid(ast::EnumInstType)) == lid ) {
741	ast::EnumInstType const * l = as<ast::EnumInstType>(lhs);
742	ast::EnumInstType const * r = as<ast::EnumInstType>(rhs);
743
744	return l->name == r->name;
745	} else if ( type_index(typeid(ast::TraitInstType)) == lid ) {
746	ast::TraitInstType const * l = as<ast::TraitInstType>(lhs);
747	ast::TraitInstType const * r = as<ast::TraitInstType>(rhs);
748
749	return l->name == r->name;
750	} else if ( type_index(typeid(ast::TupleType)) == lid ) {
751	ast::TupleType const * l = as<ast::TupleType>(lhs);
752	ast::TupleType const * r = as<ast::TupleType>(rhs);
753
754	std::vector<ast::ptr<ast::Type>> ltypes, rtypes;
755	flattenList( l->types, ( ltypes ) );
756	flattenList( r->types, ( rtypes ) );
757	if ( ltypes.size() != rtypes.size() ) return false;
758
759	for ( unsigned i = 0 ; i < ltypes.size() ; ++i ) {
760	if ( !typesPolyCompatible( ltypes[i], rtypes[i] ) ) return false;
761	}
762	return true;
763	// The remaining types (VoidType, VarArgsType, ZeroType & OneType)
764	// have no variation so will always be equal.
765	} else {
766	return true;
767	}
768	}
769
770	bool needsBoxing( Type * param, Type * arg, const TyVarMap &exprTyVars, const TypeSubstitution * env ) {
771	// is parameter is not polymorphic, don't need to box
772	if ( ! isPolyType( param, exprTyVars ) ) return false;
773	Type * newType = arg->clone();
774	if ( env ) env->apply( newType );
775	std::unique_ptr<Type> manager( newType );
776	// if the argument's type is polymorphic, we don't need to box again!
777	return ! isPolyType( newType );
778	}
779
780	bool needsBoxing( const ast::Type * param, const ast::Type * arg,
781	const TypeVarMap & typeVars, const ast::TypeSubstitution * subst ) {
782	// Don't need to box if the parameter is not polymorphic.
783	if ( !isPolyType( param, typeVars ) ) return false;
784
785	ast::ptr<ast::Type> newType = arg;
786	if ( subst ) {
787	int count = subst->apply( newType );
788	(void)count;
789	}
790	// Only need to box if the argument is not also polymorphic.
791	return !isPolyType( newType );
792	}
793
794	bool needsBoxing( Type * param, Type * arg, ApplicationExpr * appExpr, const TypeSubstitution * env ) {
795	FunctionType * function = getFunctionType( appExpr->function->result );
796	assertf( function, "ApplicationExpr has non-function type: %s", toString( appExpr->function->result ).c_str() );
797	TyVarMap exprTyVars( TypeDecl::Data{} );
798	makeTyVarMap( function, exprTyVars );
799	return needsBoxing( param, arg, exprTyVars, env );
800	}
801
802	bool needsBoxing(
803	const ast::Type * param, const ast::Type * arg,
804	const ast::ApplicationExpr * expr,
805	const ast::TypeSubstitution * subst ) {
806	const ast::FunctionType * function = getFunctionType( expr->func->result );
807	assertf( function, "ApplicationExpr has non-function type: %s", toString( expr->func->result ).c_str() );
808	TypeVarMap exprTyVars = { ast::TypeData() };
809	makeTypeVarMap( function, exprTyVars );
810	return needsBoxing( param, arg, exprTyVars, subst );
811	}
812
813	void addToTyVarMap( TypeDecl * tyVar, TyVarMap &tyVarMap ) {
814	tyVarMap.insert( tyVar->name, TypeDecl::Data{ tyVar } );
815	}
816
817	void addToTypeVarMap( const ast::TypeDecl * decl, TypeVarMap & typeVars ) {
818	typeVars.insert( ast::TypeEnvKey( decl, 0, 0 ), ast::TypeData( decl ) );
819	}
820
821	void addToTypeVarMap( const ast::TypeInstType * type, TypeVarMap & typeVars ) {
822	typeVars.insert( ast::TypeEnvKey( *type ), ast::TypeData( type->base ) );
823	}
824
825	void makeTyVarMap( Type *type, TyVarMap &tyVarMap ) {
826	for ( Type::ForallList::const_iterator tyVar = type->get_forall().begin(); tyVar != type->get_forall().end(); ++tyVar ) {
827	assert( *tyVar );
828	addToTyVarMap( *tyVar, tyVarMap );
829	}
830	if ( PointerType pointer = dynamic_cast< PointerType >( type ) ) {
831	makeTyVarMap( pointer->get_base(), tyVarMap );
832	}
833	}
834
835	void makeTypeVarMap( const ast::Type * type, TypeVarMap & typeVars ) {
836	if ( auto func = dynamic_cast<ast::FunctionType const *>( type ) ) {
837	for ( auto & typeVar : func->forall ) {
838	assert( typeVar );
839	addToTypeVarMap( typeVar, typeVars );
840	}
841	}
842	if ( auto pointer = dynamic_cast<ast::PointerType const *>( type ) ) {
843	makeTypeVarMap( pointer->base, typeVars );
844	}
845	}
846
847	void makeTypeVarMap( const ast::FunctionDecl * decl, TypeVarMap & typeVars ) {
848	for ( auto & typeDecl : decl->type_params ) {
849	addToTypeVarMap( typeDecl, typeVars );
850	}
851	}
852
853	void printTyVarMap( std::ostream &os, const TyVarMap &tyVarMap ) {
854	for ( TyVarMap::const_iterator i = tyVarMap.begin(); i != tyVarMap.end(); ++i ) {
855	os << i->first << " (" << i->second << ") ";
856	} // for
857	os << std::endl;
858	}
859
860	} // namespace GenPoly
861
862	// Local Variables: //
863	// tab-width: 4 //
864	// mode: c++ //
865	// compile-command: "make install" //
866	// End: //

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

Download in other formats: