source: src/GenPoly/GenPoly.cc@ 3c714ad

Last change on this file since 3c714ad was 52a5262e, checked in by Andrew Beach <ajbeach@…>, 2 years ago

TypeVarMap is now a subtype instead of an alias to remove the redundent constructor argument. Various bits of box pass clean-up.
  • Property mode set to 100644
File size: 32.2 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
36using namespace std;
37
38namespace 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.as<ast::TypeExpr>();
53 assertf( paramType, "Aggregate parameters should be type expressions" );
54 if ( isPolyType( paramType->type, env ) ) return true;
55 }
56 return false;
57 }
58
59 /// Checks a parameter list for polymorphic parameters from tyVars; will substitute according to env if present
60 bool hasPolyParams( std::list< Expression* >& params, const TyVarMap &tyVars, const TypeSubstitution *env ) {
61 for ( std::list< Expression* >::iterator param = params.begin(); param != params.end(); ++param ) {
62 TypeExpr *paramType = dynamic_cast< TypeExpr* >( *param );
63 assertf(paramType, "Aggregate parameters should be type expressions");
64 if ( isPolyType( paramType->get_type(), tyVars, env ) ) return true;
65 }
66 return false;
67 }
68
69 bool hasPolyParams( const std::vector<ast::ptr<ast::Expr>> & params, const TypeVarMap & typeVars, const ast::TypeSubstitution * env ) {
70 for ( auto & param : params ) {
71 auto paramType = param.as<ast::TypeExpr>();
72 assertf( paramType, "Aggregate parameters should be type expressions" );
73 if ( isPolyType( paramType->type, typeVars, env ) ) return true;
74 }
75 return false;
76 }
77
78 /// Checks a parameter list for dynamic-layout parameters from tyVars; will substitute according to env if present
79 bool hasDynParams( std::list< Expression* >& params, const TyVarMap &tyVars, const TypeSubstitution *env ) {
80 for ( std::list< Expression* >::iterator param = params.begin(); param != params.end(); ++param ) {
81 TypeExpr *paramType = dynamic_cast< TypeExpr* >( *param );
82 assertf(paramType, "Aggregate parameters should be type expressions");
83 if ( isDynType( paramType->get_type(), tyVars, env ) ) return true;
84 }
85 return false;
86 }
87
88 bool hasDynParams(
89 const std::vector<ast::ptr<ast::Expr>> & params,
90 const TypeVarMap & typeVars,
91 const ast::TypeSubstitution * subst ) {
92 for ( ast::ptr<ast::Expr> const & paramExpr : params ) {
93 auto param = paramExpr.as<ast::TypeExpr>();
94 assertf( param, "Aggregate parameters should be type expressions." );
95 if ( isDynType( param->type.get(), typeVars, subst ) ) {
96 return true;
97 }
98 }
99 return false;
100 }
101
102 /// Checks a parameter list for inclusion of polymorphic parameters; will substitute according to env if present
103 bool includesPolyParams( std::list< Expression* >& params, 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(), env ) ) return true;
108 }
109 return false;
110 }
111
112 /// Checks a parameter list for inclusion of polymorphic parameters from tyVars; will substitute according to env if present
113 bool includesPolyParams( std::list< Expression* >& params, const TyVarMap &tyVars, const TypeSubstitution *env ) {
114 for ( std::list< Expression* >::iterator param = params.begin(); param != params.end(); ++param ) {
115 TypeExpr *paramType = dynamic_cast< TypeExpr* >( *param );
116 assertf(paramType, "Aggregate parameters should be type expressions");
117 if ( includesPolyType( paramType->get_type(), tyVars, env ) ) return true;
118 }
119 return false;
120 }
121 }
122
123 Type* replaceTypeInst( Type* type, const TypeSubstitution* env ) {
124 if ( ! env ) return type;
125 if ( TypeInstType *typeInst = dynamic_cast< TypeInstType* >( type ) ) {
126 Type *newType = env->lookup( typeInst->get_name() );
127 if ( newType ) return newType;
128 }
129 return type;
130 }
131
132 const Type* replaceTypeInst( const Type* type, const TypeSubstitution* env ) {
133 if ( ! env ) return type;
134 if ( auto typeInst = dynamic_cast< const TypeInstType* >( type ) ) {
135 Type *newType = env->lookup( typeInst->get_name() );
136 if ( newType ) return newType;
137 }
138 return type;
139 }
140
141 const ast::Type * replaceTypeInst(const ast::Type * type, const ast::TypeSubstitution * env) {
142 if (!env) return type;
143 if ( auto typeInst = dynamic_cast<const ast::TypeInstType*>(type) ) {
144 auto newType = env->lookup(typeInst);
145 if (newType) return newType;
146 }
147 return type;
148 }
149
150 Type *isPolyType( Type *type, const TypeSubstitution *env ) {
151 type = replaceTypeInst( type, env );
152
153 if ( dynamic_cast< TypeInstType * >( type ) ) {
154 return type;
155 } else if ( ArrayType * arrayType = dynamic_cast< ArrayType * >( type ) ) {
156 return isPolyType( arrayType->base, env );
157 } else if ( StructInstType *structType = dynamic_cast< StructInstType* >( type ) ) {
158 if ( hasPolyParams( structType->get_parameters(), env ) ) return type;
159 } else if ( UnionInstType *unionType = dynamic_cast< UnionInstType* >( type ) ) {
160 if ( hasPolyParams( unionType->get_parameters(), env ) ) return type;
161 }
162 return 0;
163 }
164
165 const ast::Type * isPolyType(const ast::Type * type, const ast::TypeSubstitution * env) {
166 type = replaceTypeInst( type, env );
167
168 if ( dynamic_cast< const ast::TypeInstType * >( type ) ) {
169 return type;
170 } else if ( auto arrayType = dynamic_cast< const ast::ArrayType * >( type ) ) {
171 return isPolyType( arrayType->base, env );
172 } else if ( auto structType = dynamic_cast< const ast::StructInstType* >( type ) ) {
173 if ( hasPolyParams( structType->params, env ) ) return type;
174 } else if ( auto unionType = dynamic_cast< const ast::UnionInstType* >( type ) ) {
175 if ( hasPolyParams( unionType->params, env ) ) return type;
176 }
177 return 0;
178 }
179
180 Type *isPolyType( Type *type, const TyVarMap &tyVars, const TypeSubstitution *env ) {
181 type = replaceTypeInst( type, env );
182
183 if ( TypeInstType *typeInst = dynamic_cast< TypeInstType * >( type ) ) {
184 if ( tyVars.contains( typeInst->get_name() ) ) {
185 return type;
186 }
187 } else if ( ArrayType * arrayType = dynamic_cast< ArrayType * >( type ) ) {
188 return isPolyType( arrayType->base, tyVars, env );
189 } else if ( StructInstType *structType = dynamic_cast< StructInstType* >( type ) ) {
190 if ( hasPolyParams( structType->get_parameters(), tyVars, env ) ) return type;
191 } else if ( UnionInstType *unionType = dynamic_cast< UnionInstType* >( type ) ) {
192 if ( hasPolyParams( unionType->get_parameters(), tyVars, env ) ) return type;
193 }
194 return 0;
195 }
196
197const ast::Type * isPolyType( const ast::Type * type,
198 const TypeVarMap & typeVars, const ast::TypeSubstitution * subst ) {
199 type = replaceTypeInst( type, subst );
200
201 if ( auto inst = dynamic_cast< const ast::TypeInstType * >( type ) ) {
202 if ( typeVars.contains( *inst ) ) return type;
203 } else if ( auto array = dynamic_cast< const ast::ArrayType * >( type ) ) {
204 return isPolyType( array->base, typeVars, subst );
205 } else if ( auto sue = dynamic_cast< const ast::StructInstType * >( type ) ) {
206 if ( hasPolyParams( sue->params, typeVars, subst ) ) return type;
207 } else if ( auto sue = dynamic_cast< const ast::UnionInstType * >( type ) ) {
208 if ( hasPolyParams( sue->params, typeVars, subst ) ) return type;
209 }
210 return nullptr;
211}
212
213 ReferenceToType *isDynType( Type *type, const TyVarMap &tyVars, const TypeSubstitution *env ) {
214 type = replaceTypeInst( type, env );
215
216 if ( TypeInstType *typeInst = dynamic_cast< TypeInstType * >( type ) ) {
217 auto var = tyVars.find( typeInst->get_name() );
218 if ( var != tyVars.end() && var->second.isComplete ) {
219 return typeInst;
220 }
221 } else if ( StructInstType *structType = dynamic_cast< StructInstType* >( type ) ) {
222 if ( hasDynParams( structType->get_parameters(), tyVars, env ) ) return structType;
223 } else if ( UnionInstType *unionType = dynamic_cast< UnionInstType* >( type ) ) {
224 if ( hasDynParams( unionType->get_parameters(), tyVars, env ) ) return unionType;
225 }
226 return 0;
227 }
228
229const ast::BaseInstType * isDynType(
230 const ast::Type * type, const TypeVarMap & typeVars,
231 const ast::TypeSubstitution * subst ) {
232 type = replaceTypeInst( type, subst );
233
234 if ( auto inst = dynamic_cast<ast::TypeInstType const *>( type ) ) {
235 auto var = typeVars.find( *inst );
236 if ( var != typeVars.end() && var->second.isComplete ) {
237 return inst;
238 }
239 } else if ( auto inst = dynamic_cast<ast::StructInstType const *>( type ) ) {
240 if ( hasDynParams( inst->params, typeVars, subst ) ) {
241 return inst;
242 }
243 } else if ( auto inst = dynamic_cast<ast::UnionInstType const *>( type ) ) {
244 if ( hasDynParams( inst->params, typeVars, subst ) ) {
245 return inst;
246 }
247 }
248 return nullptr;
249}
250
251 ReferenceToType *isDynRet( FunctionType *function, const TyVarMap &forallTypes ) {
252 if ( function->get_returnVals().empty() ) return 0;
253
254 return (ReferenceToType*)isDynType( function->get_returnVals().front()->get_type(), forallTypes );
255 }
256
257const ast::BaseInstType *isDynRet(
258 const ast::FunctionType * type, const TypeVarMap & typeVars ) {
259 if ( type->returns.empty() ) return nullptr;
260
261 return isDynType( type->returns.front(), typeVars );
262}
263
264 ReferenceToType *isDynRet( FunctionType *function ) {
265 if ( function->get_returnVals().empty() ) return 0;
266
267 TyVarMap forallTypes( TypeDecl::Data{} );
268 makeTyVarMap( function, forallTypes );
269 return (ReferenceToType*)isDynType( function->get_returnVals().front()->get_type(), forallTypes );
270 }
271
272const ast::BaseInstType *isDynRet( const ast::FunctionType * func ) {
273 if ( func->returns.empty() ) return nullptr;
274
275 TypeVarMap forallTypes;
276 makeTypeVarMap( func, forallTypes );
277 return isDynType( func->returns.front(), forallTypes );
278}
279
280 bool needsAdapter( FunctionType *adaptee, const TyVarMap &tyVars ) {
281// if ( ! adaptee->get_returnVals().empty() && isPolyType( adaptee->get_returnVals().front()->get_type(), tyVars ) ) {
282// return true;
283// } // if
284 if ( isDynRet( adaptee, tyVars ) ) return true;
285
286 for ( std::list< DeclarationWithType* >::const_iterator innerArg = adaptee->get_parameters().begin(); innerArg != adaptee->get_parameters().end(); ++innerArg ) {
287// if ( isPolyType( (*innerArg)->get_type(), tyVars ) ) {
288 if ( isDynType( (*innerArg)->get_type(), tyVars ) ) {
289 return true;
290 } // if
291 } // for
292 return false;
293 }
294
295bool needsAdapter(
296 ast::FunctionType const * adaptee, const TypeVarMap & typeVars ) {
297 if ( isDynRet( adaptee, typeVars ) ) return true;
298
299 for ( auto param : adaptee->params ) {
300 if ( isDynType( param, typeVars ) ) {
301 return true;
302 }
303 }
304 return false;
305}
306
307 Type *isPolyPtr( Type *type, const TypeSubstitution *env ) {
308 type = replaceTypeInst( type, env );
309
310 if ( PointerType *ptr = dynamic_cast< PointerType *>( type ) ) {
311 return isPolyType( ptr->get_base(), env );
312 }
313 return 0;
314 }
315
316 Type *isPolyPtr( Type *type, const TyVarMap &tyVars, const TypeSubstitution *env ) {
317 type = replaceTypeInst( type, env );
318
319 if ( PointerType *ptr = dynamic_cast< PointerType *>( type ) ) {
320 return isPolyType( ptr->get_base(), tyVars, env );
321 }
322 return 0;
323 }
324
325const ast::Type * isPolyPtr(
326 const ast::Type * type, const TypeVarMap & typeVars,
327 const ast::TypeSubstitution * typeSubs ) {
328 type = replaceTypeInst( type, typeSubs );
329
330 if ( auto * ptr = dynamic_cast<ast::PointerType const *>( type ) ) {
331 return isPolyType( ptr->base, typeVars, typeSubs );
332 }
333 return nullptr;
334}
335
336 Type * hasPolyBase( Type *type, int *levels, const TypeSubstitution *env ) {
337 int dummy;
338 if ( ! levels ) { levels = &dummy; }
339 *levels = 0;
340
341 while ( true ) {
342 type = replaceTypeInst( type, env );
343
344 if ( PointerType *ptr = dynamic_cast< PointerType *>( type ) ) {
345 type = ptr->get_base();
346 ++(*levels);
347 } else break;
348 }
349
350 return isPolyType( type, env );
351 }
352
353 Type * hasPolyBase( Type *type, const TyVarMap &tyVars, int *levels, const TypeSubstitution *env ) {
354 int dummy;
355 if ( ! levels ) { levels = &dummy; }
356 *levels = 0;
357
358 while ( true ) {
359 type = replaceTypeInst( type, env );
360
361 if ( PointerType *ptr = dynamic_cast< PointerType *>( type ) ) {
362 type = ptr->get_base();
363 ++(*levels);
364 } else break;
365 }
366
367 return isPolyType( type, tyVars, env );
368 }
369
370ast::Type const * hasPolyBase(
371 ast::Type const * type, const TypeVarMap & typeVars,
372 int * levels, const ast::TypeSubstitution * subst ) {
373 int level_count = 0;
374
375 while ( true ) {
376 type = replaceTypeInst( type, subst );
377
378 if ( auto ptr = dynamic_cast<ast::PointerType const *>( type ) ) {
379 type = ptr->base;
380 ++level_count;
381 } else {
382 break;
383 }
384 }
385
386 if ( nullptr != levels ) { *levels = level_count; }
387 return isPolyType( type, typeVars, subst );
388}
389
390 bool includesPolyType( Type *type, const TypeSubstitution *env ) {
391 type = replaceTypeInst( type, env );
392
393 if ( dynamic_cast< TypeInstType * >( type ) ) {
394 return true;
395 } else if ( PointerType *pointerType = dynamic_cast< PointerType* >( type ) ) {
396 if ( includesPolyType( pointerType->get_base(), env ) ) return true;
397 } else if ( StructInstType *structType = dynamic_cast< StructInstType* >( type ) ) {
398 if ( includesPolyParams( structType->get_parameters(), env ) ) return true;
399 } else if ( UnionInstType *unionType = dynamic_cast< UnionInstType* >( type ) ) {
400 if ( includesPolyParams( unionType->get_parameters(), env ) ) return true;
401 }
402 return false;
403 }
404
405 bool includesPolyType( Type *type, const TyVarMap &tyVars, const TypeSubstitution *env ) {
406 type = replaceTypeInst( type, env );
407
408 if ( TypeInstType *typeInstType = dynamic_cast< TypeInstType * >( type ) ) {
409 if ( tyVars.contains( typeInstType->get_name() ) ) {
410 return true;
411 }
412 } else if ( PointerType *pointerType = dynamic_cast< PointerType* >( type ) ) {
413 if ( includesPolyType( pointerType->get_base(), tyVars, env ) ) return true;
414 } else if ( StructInstType *structType = dynamic_cast< StructInstType* >( type ) ) {
415 if ( includesPolyParams( structType->get_parameters(), tyVars, env ) ) return true;
416 } else if ( UnionInstType *unionType = dynamic_cast< UnionInstType* >( type ) ) {
417 if ( includesPolyParams( unionType->get_parameters(), tyVars, env ) ) return true;
418 }
419 return false;
420 }
421
422 FunctionType * getFunctionType( Type *ty ) {
423 PointerType *ptrType;
424 if ( ( ptrType = dynamic_cast< PointerType* >( ty ) ) ) {
425 return dynamic_cast< FunctionType* >( ptrType->get_base() ); // pointer if FunctionType, NULL otherwise
426 } else {
427 return dynamic_cast< FunctionType* >( ty ); // pointer if FunctionType, NULL otherwise
428 }
429 }
430
431 const ast::FunctionType * getFunctionType( const ast::Type * ty ) {
432 if ( auto pty = dynamic_cast< const ast::PointerType * >( ty ) ) {
433 return pty->base.as< ast::FunctionType >();
434 } else {
435 return dynamic_cast< const ast::FunctionType * >( ty );
436 }
437 }
438
439 VariableExpr * getBaseVar( Expression *expr, int *levels ) {
440 int dummy;
441 if ( ! levels ) { levels = &dummy; }
442 *levels = 0;
443
444 while ( true ) {
445 if ( VariableExpr *varExpr = dynamic_cast< VariableExpr* >( expr ) ) {
446 return varExpr;
447 } else if ( MemberExpr *memberExpr = dynamic_cast< MemberExpr* >( expr ) ) {
448 expr = memberExpr->get_aggregate();
449 } else if ( AddressExpr *addressExpr = dynamic_cast< AddressExpr* >( expr ) ) {
450 expr = addressExpr->get_arg();
451 } else if ( UntypedExpr *untypedExpr = dynamic_cast< UntypedExpr* >( expr ) ) {
452 // look for compiler-inserted dereference operator
453 NameExpr *fn = dynamic_cast< NameExpr* >( untypedExpr->get_function() );
454 if ( ! fn || fn->get_name() != std::string("*?") ) return 0;
455 expr = *untypedExpr->begin_args();
456 } else if ( CommaExpr *commaExpr = dynamic_cast< CommaExpr* >( expr ) ) {
457 // copy constructors insert comma exprs, look at second argument which contains the variable
458 expr = commaExpr->get_arg2();
459 continue;
460 } else if ( ConditionalExpr * condExpr = dynamic_cast< ConditionalExpr * >( expr ) ) {
461 int lvl1;
462 int lvl2;
463 VariableExpr * var1 = getBaseVar( condExpr->get_arg2(), &lvl1 );
464 VariableExpr * var2 = getBaseVar( condExpr->get_arg3(), &lvl2 );
465 if ( lvl1 == lvl2 && var1 && var2 && var1->get_var() == var2->get_var() ) {
466 *levels = lvl1;
467 return var1;
468 }
469 break;
470 } else break;
471
472 ++(*levels);
473 }
474
475 return 0;
476 }
477
478 namespace {
479 /// Checks if is a pointer to D
480 template<typename D, typename B>
481 bool is( const B* p ) { return type_index{typeid(D)} == type_index{typeid(*p)}; }
482
483 /// Converts to a pointer to D without checking for safety
484 template<typename D, typename B>
485 inline D* as( B* p ) { return reinterpret_cast<D*>(p); }
486
487 template<typename D, typename B>
488 inline D const * as( B const * p ) {
489 return reinterpret_cast<D const *>( p );
490 }
491
492 /// Flattens a declaration list
493 template<typename Output>
494 void flattenList( list< DeclarationWithType* > src, Output out ) {
495 for ( DeclarationWithType* decl : src ) {
496 ResolvExpr::flatten( decl->get_type(), out );
497 }
498 }
499
500 /// Flattens a list of types
501 template<typename Output>
502 void flattenList( list< Type* > src, Output out ) {
503 for ( Type* ty : src ) {
504 ResolvExpr::flatten( ty, out );
505 }
506 }
507
508 /// Flattens a list of types.
509 // There is another flattenList in Unify.
510 void flattenList( vector<ast::ptr<ast::Type>> const & src,
511 vector<ast::ptr<ast::Type>> & out ) {
512 for ( auto const & type : src ) {
513 ResolvExpr::flatten( type, out );
514 }
515 }
516
517 /// Checks if two lists of parameters are equal up to polymorphic substitution.
518 bool paramListsPolyCompatible( const list< Expression* >& aparams, const list< Expression* >& bparams ) {
519 if ( aparams.size() != bparams.size() ) return false;
520
521 for ( list< Expression* >::const_iterator at = aparams.begin(), bt = bparams.begin();
522 at != aparams.end(); ++at, ++bt ) {
523 TypeExpr *aparam = dynamic_cast< TypeExpr* >(*at);
524 assertf(aparam, "Aggregate parameters should be type expressions");
525 TypeExpr *bparam = dynamic_cast< TypeExpr* >(*bt);
526 assertf(bparam, "Aggregate parameters should be type expressions");
527
528 // xxx - might need to let VoidType be a wildcard here too; could have some voids
529 // stuffed in for dtype-statics.
530 // if ( is<VoidType>( aparam->get_type() ) || is<VoidType>( bparam->get_type() ) ) continue;
531 if ( ! typesPolyCompatible( aparam->get_type(), bparam->get_type() ) ) return false;
532 }
533
534 return true;
535 }
536
537 bool paramListsPolyCompatible(
538 std::vector<ast::ptr<ast::Expr>> const & lparams,
539 std::vector<ast::ptr<ast::Expr>> const & rparams ) {
540 if ( lparams.size() != rparams.size() ) {
541 return false;
542 }
543
544 for ( auto lparam = lparams.begin(), rparam = rparams.begin() ;
545 lparam != lparams.end() ; ++lparam, ++rparam ) {
546 ast::TypeExpr const * lexpr = lparam->as<ast::TypeExpr>();
547 assertf( lexpr, "Aggregate parameters should be type expressions" );
548 ast::TypeExpr const * rexpr = rparam->as<ast::TypeExpr>();
549 assertf( rexpr, "Aggregate parameters should be type expressions" );
550
551 // xxx - might need to let VoidType be a wildcard here too; could have some voids
552 // stuffed in for dtype-statics.
553 // if ( is<VoidType>( lexpr->type() ) || is<VoidType>( bparam->get_type() ) ) continue;
554 if ( !typesPolyCompatible( lexpr->type, rexpr->type ) ) {
555 return false;
556 }
557 }
558
559 return true;
560 }
561 }
562
563 bool typesPolyCompatible( Type *a, Type *b ) {
564 type_index aid{ typeid(*a) };
565 // polymorphic types always match
566 if ( aid == type_index{typeid(TypeInstType)} ) return true;
567
568 type_index bid{ typeid(*b) };
569 // polymorphic types always match
570 if ( bid == type_index{typeid(TypeInstType)} ) return true;
571
572 // can't match otherwise if different types
573 if ( aid != bid ) return false;
574
575 // recurse through type structure (conditions borrowed from Unify.cc)
576 if ( aid == type_index{typeid(BasicType)} ) {
577 return as<BasicType>(a)->get_kind() == as<BasicType>(b)->get_kind();
578 } else if ( aid == type_index{typeid(PointerType)} ) {
579 PointerType *ap = as<PointerType>(a), *bp = as<PointerType>(b);
580
581 // void pointers should match any other pointer type
582 return is<VoidType>( ap->get_base() ) || is<VoidType>( bp->get_base() )
583 || typesPolyCompatible( ap->get_base(), bp->get_base() );
584 } else if ( aid == type_index{typeid(ReferenceType)} ) {
585 ReferenceType *ap = as<ReferenceType>(a), *bp = as<ReferenceType>(b);
586 return is<VoidType>( ap->get_base() ) || is<VoidType>( bp->get_base() )
587 || typesPolyCompatible( ap->get_base(), bp->get_base() );
588 } else if ( aid == type_index{typeid(ArrayType)} ) {
589 ArrayType *aa = as<ArrayType>(a), *ba = as<ArrayType>(b);
590
591 if ( aa->get_isVarLen() ) {
592 if ( ! ba->get_isVarLen() ) return false;
593 } else {
594 if ( ba->get_isVarLen() ) return false;
595
596 ConstantExpr *ad = dynamic_cast<ConstantExpr*>( aa->get_dimension() );
597 ConstantExpr *bd = dynamic_cast<ConstantExpr*>( ba->get_dimension() );
598 if ( ad && bd
599 && ad->get_constant()->get_value() != bd->get_constant()->get_value() )
600 return false;
601 }
602
603 return typesPolyCompatible( aa->get_base(), ba->get_base() );
604 } else if ( aid == type_index{typeid(FunctionType)} ) {
605 FunctionType *af = as<FunctionType>(a), *bf = as<FunctionType>(b);
606
607 vector<Type*> aparams, bparams;
608 flattenList( af->get_parameters(), back_inserter( aparams ) );
609 flattenList( bf->get_parameters(), back_inserter( bparams ) );
610 if ( aparams.size() != bparams.size() ) return false;
611
612 vector<Type*> areturns, breturns;
613 flattenList( af->get_returnVals(), back_inserter( areturns ) );
614 flattenList( bf->get_returnVals(), back_inserter( breturns ) );
615 if ( areturns.size() != breturns.size() ) return false;
616
617 for ( unsigned i = 0; i < aparams.size(); ++i ) {
618 if ( ! typesPolyCompatible( aparams[i], bparams[i] ) ) return false;
619 }
620 for ( unsigned i = 0; i < areturns.size(); ++i ) {
621 if ( ! typesPolyCompatible( areturns[i], breturns[i] ) ) return false;
622 }
623 return true;
624 } else if ( aid == type_index{typeid(StructInstType)} ) {
625 StructInstType *aa = as<StructInstType>(a), *ba = as<StructInstType>(b);
626
627 if ( aa->get_name() != ba->get_name() ) return false;
628 return paramListsPolyCompatible( aa->get_parameters(), ba->get_parameters() );
629 } else if ( aid == type_index{typeid(UnionInstType)} ) {
630 UnionInstType *aa = as<UnionInstType>(a), *ba = as<UnionInstType>(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(EnumInstType)} ) {
635 return as<EnumInstType>(a)->get_name() == as<EnumInstType>(b)->get_name();
636 } else if ( aid == type_index{typeid(TraitInstType)} ) {
637 return as<TraitInstType>(a)->get_name() == as<TraitInstType>(b)->get_name();
638 } else if ( aid == type_index{typeid(TupleType)} ) {
639 TupleType *at = as<TupleType>(a), *bt = as<TupleType>(b);
640
641 vector<Type*> atypes, btypes;
642 flattenList( at->get_types(), back_inserter( atypes ) );
643 flattenList( bt->get_types(), back_inserter( btypes ) );
644 if ( atypes.size() != btypes.size() ) return false;
645
646 for ( unsigned i = 0; i < atypes.size(); ++i ) {
647 if ( ! typesPolyCompatible( atypes[i], btypes[i] ) ) return false;
648 }
649 return true;
650 } else return true; // VoidType, VarArgsType, ZeroType & OneType just need the same type
651 }
652
653bool typesPolyCompatible( ast::Type const * lhs, ast::Type const * rhs ) {
654 type_index const lid = typeid(*lhs);
655
656 // Polymorphic types always match:
657 if ( type_index(typeid(ast::TypeInstType)) == lid ) return true;
658
659 type_index const rid = typeid(*rhs);
660 if ( type_index(typeid(ast::TypeInstType)) == rid ) return true;
661
662 // All other types only match if they are the same type:
663 if ( lid != rid ) return false;
664
665 // So remaining types can be examined case by case.
666 // Recurse through type structure (conditions borrowed from Unify.cc).
667
668 if ( type_index(typeid(ast::BasicType)) == lid ) {
669 return as<ast::BasicType>(lhs)->kind == as<ast::BasicType>(rhs)->kind;
670 } else if ( type_index(typeid(ast::PointerType)) == lid ) {
671 ast::PointerType const * l = as<ast::PointerType>(lhs);
672 ast::PointerType const * r = as<ast::PointerType>(rhs);
673
674 // void pointers should match any other pointer type.
675 return is<ast::VoidType>( l->base.get() )
676 || is<ast::VoidType>( r->base.get() )
677 || typesPolyCompatible( l->base.get(), r->base.get() );
678 } else if ( type_index(typeid(ast::ReferenceType)) == lid ) {
679 ast::ReferenceType const * l = as<ast::ReferenceType>(lhs);
680 ast::ReferenceType const * r = as<ast::ReferenceType>(rhs);
681
682 // void references should match any other reference type.
683 return is<ast::VoidType>( l->base.get() )
684 || is<ast::VoidType>( r->base.get() )
685 || typesPolyCompatible( l->base.get(), r->base.get() );
686 } else if ( type_index(typeid(ast::ArrayType)) == lid ) {
687 ast::ArrayType const * l = as<ast::ArrayType>(lhs);
688 ast::ArrayType const * r = as<ast::ArrayType>(rhs);
689
690 if ( l->isVarLen ) {
691 if ( !r->isVarLen ) return false;
692 } else {
693 if ( r->isVarLen ) return false;
694
695 auto lc = l->dimension.as<ast::ConstantExpr>();
696 auto rc = r->dimension.as<ast::ConstantExpr>();
697 if ( lc && rc && lc->intValue() != rc->intValue() ) {
698 return false;
699 }
700 }
701
702 return typesPolyCompatible( l->base.get(), r->base.get() );
703 } else if ( type_index(typeid(ast::FunctionType)) == lid ) {
704 ast::FunctionType const * l = as<ast::FunctionType>(lhs);
705 ast::FunctionType const * r = as<ast::FunctionType>(rhs);
706
707 std::vector<ast::ptr<ast::Type>> lparams, rparams;
708 flattenList( l->params, lparams );
709 flattenList( r->params, rparams );
710 if ( lparams.size() != rparams.size() ) return false;
711 for ( unsigned i = 0; i < lparams.size(); ++i ) {
712 if ( !typesPolyCompatible( lparams[i], rparams[i] ) ) return false;
713 }
714
715 std::vector<ast::ptr<ast::Type>> lrets, rrets;
716 flattenList( l->returns, lrets );
717 flattenList( r->returns, rrets );
718 if ( lrets.size() != rrets.size() ) return false;
719 for ( unsigned i = 0; i < lrets.size(); ++i ) {
720 if ( !typesPolyCompatible( lrets[i], rrets[i] ) ) return false;
721 }
722 return true;
723 } else if ( type_index(typeid(ast::StructInstType)) == lid ) {
724 ast::StructInstType const * l = as<ast::StructInstType>(lhs);
725 ast::StructInstType const * r = as<ast::StructInstType>(rhs);
726
727 if ( l->name != r->name ) return false;
728 return paramListsPolyCompatible( l->params, r->params );
729 } else if ( type_index(typeid(ast::UnionInstType)) == lid ) {
730 ast::UnionInstType const * l = as<ast::UnionInstType>(lhs);
731 ast::UnionInstType const * r = as<ast::UnionInstType>(rhs);
732
733 if ( l->name != r->name ) return false;
734 return paramListsPolyCompatible( l->params, r->params );
735 } else if ( type_index(typeid(ast::EnumInstType)) == lid ) {
736 ast::EnumInstType const * l = as<ast::EnumInstType>(lhs);
737 ast::EnumInstType const * r = as<ast::EnumInstType>(rhs);
738
739 return l->name == r->name;
740 } else if ( type_index(typeid(ast::TraitInstType)) == lid ) {
741 ast::TraitInstType const * l = as<ast::TraitInstType>(lhs);
742 ast::TraitInstType const * r = as<ast::TraitInstType>(rhs);
743
744 return l->name == r->name;
745 } else if ( type_index(typeid(ast::TupleType)) == lid ) {
746 ast::TupleType const * l = as<ast::TupleType>(lhs);
747 ast::TupleType const * r = as<ast::TupleType>(rhs);
748
749 std::vector<ast::ptr<ast::Type>> ltypes, rtypes;
750 flattenList( l->types, ( ltypes ) );
751 flattenList( r->types, ( rtypes ) );
752 if ( ltypes.size() != rtypes.size() ) return false;
753
754 for ( unsigned i = 0 ; i < ltypes.size() ; ++i ) {
755 if ( !typesPolyCompatible( ltypes[i], rtypes[i] ) ) return false;
756 }
757 return true;
758 // The remaining types (VoidType, VarArgsType, ZeroType & OneType)
759 // have no variation so will always be equal.
760 } else {
761 return true;
762 }
763}
764
765 bool needsBoxing( Type * param, Type * arg, const TyVarMap &exprTyVars, const TypeSubstitution * env ) {
766 // is parameter is not polymorphic, don't need to box
767 if ( ! isPolyType( param, exprTyVars ) ) return false;
768 Type * newType = arg->clone();
769 if ( env ) env->apply( newType );
770 std::unique_ptr<Type> manager( newType );
771 // if the argument's type is polymorphic, we don't need to box again!
772 return ! isPolyType( newType );
773 }
774
775bool needsBoxing( const ast::Type * param, const ast::Type * arg,
776 const TypeVarMap & typeVars, const ast::TypeSubstitution * subst ) {
777 // Don't need to box if the parameter is not polymorphic.
778 if ( !isPolyType( param, typeVars ) ) return false;
779
780 ast::ptr<ast::Type> newType = arg;
781 if ( subst ) {
782 int count = subst->apply( newType );
783 (void)count;
784 }
785 // Only need to box if the argument is not also polymorphic.
786 return !isPolyType( newType );
787}
788
789 bool needsBoxing( Type * param, Type * arg, ApplicationExpr * appExpr, const TypeSubstitution * env ) {
790 FunctionType * function = getFunctionType( appExpr->function->result );
791 assertf( function, "ApplicationExpr has non-function type: %s", toString( appExpr->function->result ).c_str() );
792 TyVarMap exprTyVars( TypeDecl::Data{} );
793 makeTyVarMap( function, exprTyVars );
794 return needsBoxing( param, arg, exprTyVars, env );
795 }
796
797bool needsBoxing(
798 const ast::Type * param, const ast::Type * arg,
799 const ast::ApplicationExpr * expr,
800 const ast::TypeSubstitution * subst ) {
801 const ast::FunctionType * function = getFunctionType( expr->func->result );
802 assertf( function, "ApplicationExpr has non-function type: %s", toString( expr->func->result ).c_str() );
803 TypeVarMap exprTyVars;
804 makeTypeVarMap( function, exprTyVars );
805 return needsBoxing( param, arg, exprTyVars, subst );
806}
807
808 void addToTyVarMap( TypeDecl * tyVar, TyVarMap &tyVarMap ) {
809 tyVarMap.insert( tyVar->name, TypeDecl::Data{ tyVar } );
810 }
811
812void addToTypeVarMap( const ast::TypeDecl * decl, TypeVarMap & typeVars ) {
813 typeVars.insert( ast::TypeEnvKey( decl, 0, 0 ), ast::TypeData( decl ) );
814}
815
816void addToTypeVarMap( const ast::TypeInstType * type, TypeVarMap & typeVars ) {
817 typeVars.insert( ast::TypeEnvKey( *type ), ast::TypeData( type->base ) );
818}
819
820 void makeTyVarMap( Type *type, TyVarMap &tyVarMap ) {
821 for ( Type::ForallList::const_iterator tyVar = type->get_forall().begin(); tyVar != type->get_forall().end(); ++tyVar ) {
822 assert( *tyVar );
823 addToTyVarMap( *tyVar, tyVarMap );
824 }
825 if ( PointerType *pointer = dynamic_cast< PointerType* >( type ) ) {
826 makeTyVarMap( pointer->get_base(), tyVarMap );
827 }
828 }
829
830void makeTypeVarMap( const ast::Type * type, TypeVarMap & typeVars ) {
831 if ( auto func = dynamic_cast<ast::FunctionType const *>( type ) ) {
832 for ( auto & typeVar : func->forall ) {
833 assert( typeVar );
834 addToTypeVarMap( typeVar, typeVars );
835 }
836 }
837 if ( auto pointer = dynamic_cast<ast::PointerType const *>( type ) ) {
838 makeTypeVarMap( pointer->base, typeVars );
839 }
840}
841
842void makeTypeVarMap( const ast::FunctionDecl * decl, TypeVarMap & typeVars ) {
843 for ( auto & typeDecl : decl->type_params ) {
844 addToTypeVarMap( typeDecl, typeVars );
845 }
846}
847
848 void printTyVarMap( std::ostream &os, const TyVarMap &tyVarMap ) {
849 for ( TyVarMap::const_iterator i = tyVarMap.begin(); i != tyVarMap.end(); ++i ) {
850 os << i->first << " (" << i->second << ") ";
851 } // for
852 os << std::endl;
853 }
854
855} // namespace GenPoly
856
857// Local Variables: //
858// tab-width: 4 //
859// mode: c++ //
860// compile-command: "make install" //
861// End: //
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