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source: src/GenPoly/GenPoly.cc @ 1744e6d

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 1744e6d was 5a3ac84, checked in by Aaron Moss <a3moss@…>, 8 years ago
Fixed Box(T*) generic instantiation bug
Property mode set to `100644`
File size: 17.3 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 : Peter A. Buhr
12	// Last Modified On : Wed Jun 29 21:45:53 2016
13	// Update Count : 14
14	//
15
16	#include "GenPoly.h"
17	#include "assert.h"
18
19	#include "SynTree/Expression.h"
20	#include "SynTree/Type.h"
21	#include "ResolvExpr/typeops.h"
22
23	#include <iostream>
24	#include <iterator>
25	#include <list>
26	#include <typeindex>
27	#include <typeinfo>
28	#include <vector>
29	using namespace std;
30
31	namespace GenPoly {
32	namespace {
33	/// Checks a parameter list for polymorphic parameters; will substitute according to env if present
34	bool hasPolyParams( std::list< Expression* >& params, const TypeSubstitution *env ) {
35	for ( std::list< Expression* >::iterator param = params.begin(); param != params.end(); ++param ) {
36	TypeExpr paramType = dynamic_cast< TypeExpr >( *param );
37	assertf(paramType, "Aggregate parameters should be type expressions");
38	if ( isPolyType( paramType->get_type(), env ) ) return true;
39	}
40	return false;
41	}
42
43	/// Checks a parameter list for polymorphic parameters from tyVars; will substitute according to env if present
44	bool hasPolyParams( std::list< Expression* >& params, const TyVarMap &tyVars, const TypeSubstitution *env ) {
45	for ( std::list< Expression* >::iterator param = params.begin(); param != params.end(); ++param ) {
46	TypeExpr paramType = dynamic_cast< TypeExpr >( *param );
47	assertf(paramType, "Aggregate parameters should be type expressions");
48	if ( isPolyType( paramType->get_type(), tyVars, env ) ) return true;
49	}
50	return false;
51	}
52
53	/// Checks a parameter list for dynamic-layout parameters from tyVars; will substitute according to env if present
54	bool hasDynParams( std::list< Expression* >& params, const TyVarMap &tyVars, const TypeSubstitution *env ) {
55	for ( std::list< Expression* >::iterator param = params.begin(); param != params.end(); ++param ) {
56	TypeExpr paramType = dynamic_cast< TypeExpr >( *param );
57	assertf(paramType, "Aggregate parameters should be type expressions");
58	if ( isDynType( paramType->get_type(), tyVars, env ) ) return true;
59	}
60	return false;
61	}
62
63	/// Checks a parameter list for inclusion of polymorphic parameters; will substitute according to env if present
64	bool includesPolyParams( std::list< Expression* >& params, const TypeSubstitution *env ) {
65	for ( std::list< Expression* >::iterator param = params.begin(); param != params.end(); ++param ) {
66	TypeExpr paramType = dynamic_cast< TypeExpr >( *param );
67	assertf(paramType, "Aggregate parameters should be type expressions");
68	if ( includesPolyType( paramType->get_type(), env ) ) return true;
69	}
70	return false;
71	}
72
73	/// Checks a parameter list for inclusion of polymorphic parameters from tyVars; will substitute according to env if present
74	bool includesPolyParams( std::list< Expression* >& params, const TyVarMap &tyVars, const TypeSubstitution *env ) {
75	for ( std::list< Expression* >::iterator param = params.begin(); param != params.end(); ++param ) {
76	TypeExpr paramType = dynamic_cast< TypeExpr >( *param );
77	assertf(paramType, "Aggregate parameters should be type expressions");
78	if ( includesPolyType( paramType->get_type(), tyVars, env ) ) return true;
79	}
80	return false;
81	}
82	}
83
84	Type* replaceTypeInst( Type* type, const TypeSubstitution* env ) {
85	if ( ! env ) return type;
86	if ( TypeInstType typeInst = dynamic_cast< TypeInstType >( type ) ) {
87	Type *newType = env->lookup( typeInst->get_name() );
88	if ( newType ) return newType;
89	}
90	return type;
91	}
92
93	Type isPolyType( Type type, const TypeSubstitution *env ) {
94	type = replaceTypeInst( type, env );
95
96	if ( dynamic_cast< TypeInstType * >( type ) ) {
97	return type;
98	} else if ( StructInstType structType = dynamic_cast< StructInstType >( type ) ) {
99	if ( hasPolyParams( structType->get_parameters(), env ) ) return type;
100	} else if ( UnionInstType unionType = dynamic_cast< UnionInstType >( type ) ) {
101	if ( hasPolyParams( unionType->get_parameters(), env ) ) return type;
102	}
103	return 0;
104	}
105
106	Type isPolyType( Type type, const TyVarMap &tyVars, const TypeSubstitution *env ) {
107	type = replaceTypeInst( type, env );
108
109	if ( TypeInstType typeInst = dynamic_cast< TypeInstType >( type ) ) {
110	if ( tyVars.find( typeInst->get_name() ) != tyVars.end() ) {
111	return type;
112	}
113	} else if ( StructInstType structType = dynamic_cast< StructInstType >( type ) ) {
114	if ( hasPolyParams( structType->get_parameters(), tyVars, env ) ) return type;
115	} else if ( UnionInstType unionType = dynamic_cast< UnionInstType >( type ) ) {
116	if ( hasPolyParams( unionType->get_parameters(), tyVars, env ) ) return type;
117	}
118	return 0;
119	}
120
121	ReferenceToType isDynType( Type type, const TyVarMap &tyVars, const TypeSubstitution *env ) {
122	type = replaceTypeInst( type, env );
123
124	if ( TypeInstType typeInst = dynamic_cast< TypeInstType >( type ) ) {
125	auto var = tyVars.find( typeInst->get_name() );
126	if ( var != tyVars.end() && var->second.isComplete ) {
127	return typeInst;
128	}
129	} else if ( StructInstType structType = dynamic_cast< StructInstType >( type ) ) {
130	if ( hasDynParams( structType->get_parameters(), tyVars, env ) ) return structType;
131	} else if ( UnionInstType unionType = dynamic_cast< UnionInstType >( type ) ) {
132	if ( hasDynParams( unionType->get_parameters(), tyVars, env ) ) return unionType;
133	}
134	return 0;
135	}
136
137	ReferenceToType isDynRet( FunctionType function, const TyVarMap &forallTypes ) {
138	if ( function->get_returnVals().empty() ) return 0;
139
140	return (ReferenceToType*)isDynType( function->get_returnVals().front()->get_type(), forallTypes );
141	}
142
143	ReferenceToType isDynRet( FunctionType function ) {
144	if ( function->get_returnVals().empty() ) return 0;
145
146	TyVarMap forallTypes( TypeDecl::Data{} );
147	makeTyVarMap( function, forallTypes );
148	return (ReferenceToType*)isDynType( function->get_returnVals().front()->get_type(), forallTypes );
149	}
150
151	bool needsAdapter( FunctionType *adaptee, const TyVarMap &tyVars ) {
152	// if ( ! adaptee->get_returnVals().empty() && isPolyType( adaptee->get_returnVals().front()->get_type(), tyVars ) ) {
153	// return true;
154	// } // if
155	if ( isDynRet( adaptee, tyVars ) ) return true;
156
157	for ( std::list< DeclarationWithType* >::const_iterator innerArg = adaptee->get_parameters().begin(); innerArg != adaptee->get_parameters().end(); ++innerArg ) {
158	// if ( isPolyType( (*innerArg)->get_type(), tyVars ) ) {
159	if ( isDynType( (*innerArg)->get_type(), tyVars ) ) {
160	return true;
161	} // if
162	} // for
163	return false;
164	}
165
166	Type isPolyPtr( Type type, const TypeSubstitution *env ) {
167	type = replaceTypeInst( type, env );
168
169	if ( PointerType ptr = dynamic_cast< PointerType >( type ) ) {
170	return isPolyType( ptr->get_base(), env );
171	}
172	return 0;
173	}
174
175	Type isPolyPtr( Type type, const TyVarMap &tyVars, const TypeSubstitution *env ) {
176	type = replaceTypeInst( type, env );
177
178	if ( PointerType ptr = dynamic_cast< PointerType >( type ) ) {
179	return isPolyType( ptr->get_base(), tyVars, env );
180	}
181	return 0;
182	}
183
184	Type * hasPolyBase( Type type, int levels, const TypeSubstitution *env ) {
185	int dummy;
186	if ( ! levels ) { levels = &dummy; }
187	*levels = 0;
188
189	while ( true ) {
190	type = replaceTypeInst( type, env );
191
192	if ( PointerType ptr = dynamic_cast< PointerType >( type ) ) {
193	type = ptr->get_base();
194	++(*levels);
195	} else break;
196	}
197
198	return isPolyType( type, env );
199	}
200
201	Type * hasPolyBase( Type type, const TyVarMap &tyVars, int levels, const TypeSubstitution *env ) {
202	int dummy;
203	if ( ! levels ) { levels = &dummy; }
204	*levels = 0;
205
206	while ( true ) {
207	type = replaceTypeInst( type, env );
208
209	if ( PointerType ptr = dynamic_cast< PointerType >( type ) ) {
210	type = ptr->get_base();
211	++(*levels);
212	} else break;
213	}
214
215	return isPolyType( type, tyVars, env );
216	}
217
218	bool includesPolyType( Type type, const TypeSubstitution env ) {
219	type = replaceTypeInst( type, env );
220
221	if ( dynamic_cast< TypeInstType * >( type ) ) {
222	return true;
223	} else if ( PointerType pointerType = dynamic_cast< PointerType >( type ) ) {
224	if ( includesPolyType( pointerType->get_base(), env ) ) return true;
225	} else if ( StructInstType structType = dynamic_cast< StructInstType >( type ) ) {
226	if ( includesPolyParams( structType->get_parameters(), env ) ) return true;
227	} else if ( UnionInstType unionType = dynamic_cast< UnionInstType >( type ) ) {
228	if ( includesPolyParams( unionType->get_parameters(), env ) ) return true;
229	}
230	return false;
231	}
232
233	bool includesPolyType( Type type, const TyVarMap &tyVars, const TypeSubstitution env ) {
234	type = replaceTypeInst( type, env );
235
236	if ( TypeInstType typeInstType = dynamic_cast< TypeInstType >( type ) ) {
237	if ( tyVars.find( typeInstType->get_name() ) != tyVars.end() ) {
238	return true;
239	}
240	} else if ( PointerType pointerType = dynamic_cast< PointerType >( type ) ) {
241	if ( includesPolyType( pointerType->get_base(), tyVars, env ) ) return true;
242	} else if ( StructInstType structType = dynamic_cast< StructInstType >( type ) ) {
243	if ( includesPolyParams( structType->get_parameters(), tyVars, env ) ) return true;
244	} else if ( UnionInstType unionType = dynamic_cast< UnionInstType >( type ) ) {
245	if ( includesPolyParams( unionType->get_parameters(), tyVars, env ) ) return true;
246	}
247	return false;
248	}
249
250	FunctionType * getFunctionType( Type *ty ) {
251	PointerType *ptrType;
252	if ( ( ptrType = dynamic_cast< PointerType* >( ty ) ) ) {
253	return dynamic_cast< FunctionType* >( ptrType->get_base() ); // pointer if FunctionType, NULL otherwise
254	} else {
255	return dynamic_cast< FunctionType* >( ty ); // pointer if FunctionType, NULL otherwise
256	}
257	}
258
259	VariableExpr * getBaseVar( Expression expr, int levels ) {
260	int dummy;
261	if ( ! levels ) { levels = &dummy; }
262	*levels = 0;
263
264	while ( true ) {
265	if ( VariableExpr varExpr = dynamic_cast< VariableExpr >( expr ) ) {
266	return varExpr;
267	} else if ( MemberExpr memberExpr = dynamic_cast< MemberExpr >( expr ) ) {
268	expr = memberExpr->get_aggregate();
269	} else if ( AddressExpr addressExpr = dynamic_cast< AddressExpr >( expr ) ) {
270	expr = addressExpr->get_arg();
271	} else if ( UntypedExpr untypedExpr = dynamic_cast< UntypedExpr >( expr ) ) {
272	// look for compiler-inserted dereference operator
273	NameExpr fn = dynamic_cast< NameExpr >( untypedExpr->get_function() );
274	if ( ! fn \|\| fn->get_name() != std::string("*?") ) return 0;
275	expr = *untypedExpr->begin_args();
276	} else if ( CommaExpr commaExpr = dynamic_cast< CommaExpr >( expr ) ) {
277	// copy constructors insert comma exprs, look at second argument which contains the variable
278	expr = commaExpr->get_arg2();
279	continue;
280	} else if ( ConditionalExpr * condExpr = dynamic_cast< ConditionalExpr * >( expr ) ) {
281	int lvl1;
282	int lvl2;
283	VariableExpr * var1 = getBaseVar( condExpr->get_arg2(), &lvl1 );
284	VariableExpr * var2 = getBaseVar( condExpr->get_arg3(), &lvl2 );
285	if ( lvl1 == lvl2 && var1 && var2 && var1->get_var() == var2->get_var() ) {
286	*levels = lvl1;
287	return var1;
288	}
289	break;
290	} else break;
291
292	++(*levels);
293	}
294
295	return 0;
296	}
297
298	namespace {
299	/// Checks if is a pointer to D
300	template<typename D, typename B>
301	bool is( const B* p ) { return type_index{typeid(D)} == type_index{typeid(*p)}; }
302
303	/// Converts to a pointer to D without checking for safety
304	template<typename D, typename B>
305	inline D* as( B* p ) { return reinterpret_cast<D*>(p); }
306
307	/// Flattens a declaration list
308	template<typename Output>
309	void flattenList( list< DeclarationWithType* > src, Output out ) {
310	for ( DeclarationWithType* decl : src ) {
311	ResolvExpr::flatten( decl->get_type(), out );
312	}
313	}
314
315	/// Flattens a list of types
316	template<typename Output>
317	void flattenList( list< Type* > src, Output out ) {
318	for ( Type* ty : src ) {
319	ResolvExpr::flatten( ty, out );
320	}
321	}
322
323	/// Checks if two lists of parameters are equal up to polymorphic substitution.
324	bool paramListsPolyCompatible( const list< Expression* >& aparams, const list< Expression* >& bparams ) {
325	if ( aparams.size() != bparams.size() ) return false;
326
327	for ( list< Expression* >::const_iterator at = aparams.begin(), bt = bparams.begin();
328	at != aparams.end(); ++at, ++bt ) {
329	TypeExpr aparam = dynamic_cast< TypeExpr >(*at);
330	assertf(aparam, "Aggregate parameters should be type expressions");
331	TypeExpr bparam = dynamic_cast< TypeExpr >(*bt);
332	assertf(bparam, "Aggregate parameters should be type expressions");
333
334	// xxx - might need to let VoidType be a wildcard here too; could have some voids
335	// stuffed in for dtype-statics.
336	// if ( is<VoidType>( aparam->get_type() ) \|\| is<VoidType>( bparam->get_type() ) ) continue;
337	if ( ! typesPolyCompatible( aparam->get_type(), bparam->get_type() ) ) return false;
338	}
339
340	return true;
341	}
342	}
343
344	bool typesPolyCompatible( Type a, Type b ) {
345	type_index aid{ typeid(*a) };
346	// polymorphic types always match
347	if ( aid == type_index{typeid(TypeInstType)} ) return true;
348
349	type_index bid{ typeid(*b) };
350	// polymorphic types always match
351	if ( bid == type_index{typeid(TypeInstType)} ) return true;
352
353	// can't match otherwise if different types
354	if ( aid != bid ) return false;
355
356	// recurse through type structure (conditions borrowed from Unify.cc)
357	if ( aid == type_index{typeid(BasicType)} ) {
358	return as<BasicType>(a)->get_kind() == as<BasicType>(b)->get_kind();
359	} else if ( aid == type_index{typeid(PointerType)} ) {
360	PointerType ap = as<PointerType>(a), bp = as<PointerType>(b);
361
362	// void pointers should match any other pointer type
363	return is<VoidType>( ap->get_base() ) \|\| is<VoidType>( bp->get_base() )
364	\|\| typesPolyCompatible( ap->get_base(), bp->get_base() );
365	} else if ( aid == type_index{typeid(ArrayType)} ) {
366	ArrayType aa = as<ArrayType>(a), ba = as<ArrayType>(b);
367
368	if ( aa->get_isVarLen() ) {
369	if ( ! ba->get_isVarLen() ) return false;
370	} else {
371	if ( ba->get_isVarLen() ) return false;
372
373	ConstantExpr ad = dynamic_cast<ConstantExpr>( aa->get_dimension() );
374	ConstantExpr bd = dynamic_cast<ConstantExpr>( ba->get_dimension() );
375	if ( ad && bd
376	&& ad->get_constant()->get_value() != bd->get_constant()->get_value() )
377	return false;
378	}
379
380	return typesPolyCompatible( aa->get_base(), ba->get_base() );
381	} else if ( aid == type_index{typeid(FunctionType)} ) {
382	FunctionType af = as<FunctionType>(a), bf = as<FunctionType>(b);
383
384	vector<Type*> aparams, bparams;
385	flattenList( af->get_parameters(), back_inserter( aparams ) );
386	flattenList( bf->get_parameters(), back_inserter( bparams ) );
387	if ( aparams.size() != bparams.size() ) return false;
388
389	vector<Type*> areturns, breturns;
390	flattenList( af->get_returnVals(), back_inserter( areturns ) );
391	flattenList( bf->get_returnVals(), back_inserter( breturns ) );
392	if ( areturns.size() != breturns.size() ) return false;
393
394	for ( unsigned i = 0; i < aparams.size(); ++i ) {
395	if ( ! typesPolyCompatible( aparams[i], bparams[i] ) ) return false;
396	}
397	for ( unsigned i = 0; i < areturns.size(); ++i ) {
398	if ( ! typesPolyCompatible( areturns[i], breturns[i] ) ) return false;
399	}
400	return true;
401	} else if ( aid == type_index{typeid(StructInstType)} ) {
402	StructInstType aa = as<StructInstType>(a), ba = as<StructInstType>(b);
403
404	if ( aa->get_name() != ba->get_name() ) return false;
405	return paramListsPolyCompatible( aa->get_parameters(), ba->get_parameters() );
406	} else if ( aid == type_index{typeid(UnionInstType)} ) {
407	UnionInstType aa = as<UnionInstType>(a), ba = as<UnionInstType>(b);
408
409	if ( aa->get_name() != ba->get_name() ) return false;
410	return paramListsPolyCompatible( aa->get_parameters(), ba->get_parameters() );
411	} else if ( aid == type_index{typeid(EnumInstType)} ) {
412	return as<EnumInstType>(a)->get_name() == as<EnumInstType>(b)->get_name();
413	} else if ( aid == type_index{typeid(TraitInstType)} ) {
414	return as<TraitInstType>(a)->get_name() == as<TraitInstType>(b)->get_name();
415	} else if ( aid == type_index{typeid(TupleType)} ) {
416	TupleType at = as<TupleType>(a), bt = as<TupleType>(b);
417
418	vector<Type*> atypes, btypes;
419	flattenList( at->get_types(), back_inserter( atypes ) );
420	flattenList( bt->get_types(), back_inserter( btypes ) );
421	if ( atypes.size() != btypes.size() ) return false;
422
423	for ( unsigned i = 0; i < atypes.size(); ++i ) {
424	if ( ! typesPolyCompatible( atypes[i], btypes[i] ) ) return false;
425	}
426	return true;
427	} else return true; // VoidType, VarArgsType, ZeroType & OneType just need the same type
428	}
429
430	void addToTyVarMap( TypeDecl * tyVar, TyVarMap &tyVarMap ) {
431	tyVarMap[ tyVar->get_name() ] = TypeDecl::Data{ tyVar };
432	}
433
434	void makeTyVarMap( Type *type, TyVarMap &tyVarMap ) {
435	for ( Type::ForallList::const_iterator tyVar = type->get_forall().begin(); tyVar != type->get_forall().end(); ++tyVar ) {
436	assert( *tyVar );
437	addToTyVarMap( *tyVar, tyVarMap );
438	}
439	if ( PointerType pointer = dynamic_cast< PointerType >( type ) ) {
440	makeTyVarMap( pointer->get_base(), tyVarMap );
441	}
442	}
443
444	void printTyVarMap( std::ostream &os, const TyVarMap &tyVarMap ) {
445	for ( TyVarMap::const_iterator i = tyVarMap.begin(); i != tyVarMap.end(); ++i ) {
446	os << i->first << " (" << i->second << ") ";
447	} // for
448	os << std::endl;
449	}
450
451	} // namespace GenPoly
452
453	// Local Variables: //
454	// tab-width: 4 //
455	// mode: c++ //
456	// compile-command: "make install" //
457	// End: //

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