source: src/GenPoly/GenPoly.cc@ dd46fd3

ADT ast-experimental
Last change on this file since dd46fd3 was 93c10de, checked in by Andrew Beach <ajbeach@…>, 3 years ago

Minimal changes to pull out nested types, TypeInstType::TypeEnvKey and TypeDecl::Data (now TypeData) from there parent types. Although they do connect to the parent types they were nested in they are used on their own most of the time.
  • Property mode set to 100644
File size: 31.5 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/Type.hpp"
27#include "GenPoly/ErasableScopedMap.h" // for ErasableScopedMap<>::const_it...
28#include "ResolvExpr/typeops.h" // for flatten
29#include "SynTree/Constant.h" // for Constant
30#include "SynTree/Expression.h" // for Expression, TypeExpr, Constan...
31#include "SynTree/Type.h" // for Type, StructInstType, UnionIn...
32#include "SynTree/TypeSubstitution.h" // for TypeSubstitution
33
34using namespace std;
35
36namespace GenPoly {
37 namespace {
38 /// Checks a parameter list for polymorphic parameters; will substitute according to env if present
39 bool hasPolyParams( std::list< Expression* >& params, const TypeSubstitution *env ) {
40 for ( std::list< Expression* >::iterator param = params.begin(); param != params.end(); ++param ) {
41 TypeExpr *paramType = dynamic_cast< TypeExpr* >( *param );
42 assertf(paramType, "Aggregate parameters should be type expressions");
43 if ( isPolyType( paramType->get_type(), env ) ) return true;
44 }
45 return false;
46 }
47
48 bool hasPolyParams( const std::vector<ast::ptr<ast::Expr>> & params, const ast::TypeSubstitution * env) {
49 for (auto &param : params) {
50 auto paramType = param.strict_as<ast::TypeExpr>();
51 if (isPolyType(paramType->type, env)) return true;
52 }
53 return false;
54 }
55
56 /// Checks a parameter list for polymorphic parameters from tyVars; will substitute according to env if present
57 bool hasPolyParams( std::list< Expression* >& params, const TyVarMap &tyVars, const TypeSubstitution *env ) {
58 for ( std::list< Expression* >::iterator param = params.begin(); param != params.end(); ++param ) {
59 TypeExpr *paramType = dynamic_cast< TypeExpr* >( *param );
60 assertf(paramType, "Aggregate parameters should be type expressions");
61 if ( isPolyType( paramType->get_type(), tyVars, env ) ) return true;
62 }
63 return false;
64 }
65
66 /// Checks a parameter list for dynamic-layout parameters from tyVars; will substitute according to env if present
67 bool hasDynParams( std::list< Expression* >& params, const TyVarMap &tyVars, const TypeSubstitution *env ) {
68 for ( std::list< Expression* >::iterator param = params.begin(); param != params.end(); ++param ) {
69 TypeExpr *paramType = dynamic_cast< TypeExpr* >( *param );
70 assertf(paramType, "Aggregate parameters should be type expressions");
71 if ( isDynType( paramType->get_type(), tyVars, env ) ) return true;
72 }
73 return false;
74 }
75
76 bool hasDynParams(
77 const std::vector<ast::ptr<ast::Expr>> & params,
78 const TypeVarMap & typeVars,
79 const ast::TypeSubstitution * subst ) {
80 for ( ast::ptr<ast::Expr> const & paramExpr : params ) {
81 auto param = paramExpr.as<ast::TypeExpr>();
82 assertf( param, "Aggregate parameters should be type expressions." );
83 if ( isDynType( param->type.get(), typeVars, subst ) ) {
84 return true;
85 }
86 }
87 return false;
88 }
89
90 /// Checks a parameter list for inclusion of polymorphic parameters; will substitute according to env if present
91 bool includesPolyParams( std::list< Expression* >& params, const TypeSubstitution *env ) {
92 for ( std::list< Expression* >::iterator param = params.begin(); param != params.end(); ++param ) {
93 TypeExpr *paramType = dynamic_cast< TypeExpr* >( *param );
94 assertf(paramType, "Aggregate parameters should be type expressions");
95 if ( includesPolyType( paramType->get_type(), env ) ) return true;
96 }
97 return false;
98 }
99
100 /// Checks a parameter list for inclusion of polymorphic parameters from tyVars; will substitute according to env if present
101 bool includesPolyParams( std::list< Expression* >& params, const TyVarMap &tyVars, const TypeSubstitution *env ) {
102 for ( std::list< Expression* >::iterator param = params.begin(); param != params.end(); ++param ) {
103 TypeExpr *paramType = dynamic_cast< TypeExpr* >( *param );
104 assertf(paramType, "Aggregate parameters should be type expressions");
105 if ( includesPolyType( paramType->get_type(), tyVars, env ) ) return true;
106 }
107 return false;
108 }
109 }
110
111 Type* replaceTypeInst( Type* type, const TypeSubstitution* env ) {
112 if ( ! env ) return type;
113 if ( TypeInstType *typeInst = dynamic_cast< TypeInstType* >( type ) ) {
114 Type *newType = env->lookup( typeInst->get_name() );
115 if ( newType ) return newType;
116 }
117 return type;
118 }
119
120 const Type* replaceTypeInst( const Type* type, const TypeSubstitution* env ) {
121 if ( ! env ) return type;
122 if ( auto typeInst = dynamic_cast< const TypeInstType* >( type ) ) {
123 Type *newType = env->lookup( typeInst->get_name() );
124 if ( newType ) return newType;
125 }
126 return type;
127 }
128
129 const ast::Type * replaceTypeInst(const ast::Type * type, const ast::TypeSubstitution * env) {
130 if (!env) return type;
131 if ( auto typeInst = dynamic_cast<const ast::TypeInstType*>(type) ) {
132 auto newType = env->lookup(typeInst);
133 if (newType) return newType;
134 }
135 return type;
136 }
137
138 Type *isPolyType( Type *type, const TypeSubstitution *env ) {
139 type = replaceTypeInst( type, env );
140
141 if ( dynamic_cast< TypeInstType * >( type ) ) {
142 return type;
143 } else if ( ArrayType * arrayType = dynamic_cast< ArrayType * >( type ) ) {
144 return isPolyType( arrayType->base, env );
145 } else if ( StructInstType *structType = dynamic_cast< StructInstType* >( type ) ) {
146 if ( hasPolyParams( structType->get_parameters(), env ) ) return type;
147 } else if ( UnionInstType *unionType = dynamic_cast< UnionInstType* >( type ) ) {
148 if ( hasPolyParams( unionType->get_parameters(), env ) ) return type;
149 }
150 return 0;
151 }
152
153 const ast::Type * isPolyType(const ast::Type * type, const ast::TypeSubstitution * env) {
154 type = replaceTypeInst( type, env );
155
156 if ( dynamic_cast< const ast::TypeInstType * >( type ) ) {
157 return type;
158 } else if ( auto arrayType = dynamic_cast< const ast::ArrayType * >( type ) ) {
159 return isPolyType( arrayType->base, env );
160 } else if ( auto structType = dynamic_cast< const ast::StructInstType* >( type ) ) {
161 if ( hasPolyParams( structType->params, env ) ) return type;
162 } else if ( auto unionType = dynamic_cast< const ast::UnionInstType* >( type ) ) {
163 if ( hasPolyParams( unionType->params, env ) ) return type;
164 }
165 return 0;
166 }
167
168 Type *isPolyType( Type *type, const TyVarMap &tyVars, const TypeSubstitution *env ) {
169 type = replaceTypeInst( type, env );
170
171 if ( TypeInstType *typeInst = dynamic_cast< TypeInstType * >( type ) ) {
172 if ( tyVars.find( typeInst->get_name() ) != tyVars.end() ) {
173 return type;
174 }
175 } else if ( ArrayType * arrayType = dynamic_cast< ArrayType * >( type ) ) {
176 return isPolyType( arrayType->base, tyVars, env );
177 } else if ( StructInstType *structType = dynamic_cast< StructInstType* >( type ) ) {
178 if ( hasPolyParams( structType->get_parameters(), tyVars, env ) ) return type;
179 } else if ( UnionInstType *unionType = dynamic_cast< UnionInstType* >( type ) ) {
180 if ( hasPolyParams( unionType->get_parameters(), tyVars, env ) ) return type;
181 }
182 return 0;
183 }
184
185 const ast::Type * isPolyType(const ast::Type * type, const TyVarMap & tyVars, const ast::TypeSubstitution * env) {
186 type = replaceTypeInst( type, env );
187
188 if ( auto typeInst = dynamic_cast< const ast::TypeInstType * >( type ) ) {
189 return tyVars.find(typeInst->typeString()) != tyVars.end() ? type : nullptr;
190 } else if ( auto arrayType = dynamic_cast< const ast::ArrayType * >( type ) ) {
191 return isPolyType( arrayType->base, env );
192 } else if ( auto structType = dynamic_cast< const ast::StructInstType* >( type ) ) {
193 if ( hasPolyParams( structType->params, env ) ) return type;
194 } else if ( auto unionType = dynamic_cast< const ast::UnionInstType* >( type ) ) {
195 if ( hasPolyParams( unionType->params, env ) ) return type;
196 }
197 return nullptr;
198 }
199
200const ast::Type * isPolyType( const ast::Type * type,
201 const TypeVarMap & typeVars, const ast::TypeSubstitution * subst ) {
202 type = replaceTypeInst( type, subst );
203
204 if ( auto inst = dynamic_cast< const ast::TypeInstType * >( type ) ) {
205 if ( typeVars.find( *inst ) != typeVars.end() ) return type;
206 } else if ( auto array = dynamic_cast< const ast::ArrayType * >( type ) ) {
207 return isPolyType( array->base, subst );
208 } else if ( auto sue = dynamic_cast< const ast::StructInstType * >( type ) ) {
209 if ( hasPolyParams( sue->params, subst ) ) return type;
210 } else if ( auto sue = dynamic_cast< const ast::UnionInstType * >( type ) ) {
211 if ( hasPolyParams( sue->params, subst ) ) return type;
212 }
213 return nullptr;
214}
215
216 ReferenceToType *isDynType( Type *type, const TyVarMap &tyVars, const TypeSubstitution *env ) {
217 type = replaceTypeInst( type, env );
218
219 if ( TypeInstType *typeInst = dynamic_cast< TypeInstType * >( type ) ) {
220 auto var = tyVars.find( typeInst->get_name() );
221 if ( var != tyVars.end() && var->second.isComplete ) {
222 return typeInst;
223 }
224 } else if ( StructInstType *structType = dynamic_cast< StructInstType* >( type ) ) {
225 if ( hasDynParams( structType->get_parameters(), tyVars, env ) ) return structType;
226 } else if ( UnionInstType *unionType = dynamic_cast< UnionInstType* >( type ) ) {
227 if ( hasDynParams( unionType->get_parameters(), tyVars, env ) ) return unionType;
228 }
229 return 0;
230 }
231
232const ast::BaseInstType * isDynType(
233 const ast::Type * type, const TypeVarMap & typeVars,
234 const ast::TypeSubstitution * subst ) {
235 type = replaceTypeInst( type, subst );
236
237 if ( auto inst = dynamic_cast<ast::TypeInstType const *>( type ) ) {
238 auto var = typeVars.find( *inst );
239 if ( var != typeVars.end() && var->second.isComplete ) {
240 return inst;
241 }
242 } else if ( auto inst = dynamic_cast<ast::StructInstType const *>( type ) ) {
243 if ( hasDynParams( inst->params, typeVars, subst ) ) {
244 return inst;
245 }
246 } else if ( auto inst = dynamic_cast<ast::UnionInstType const *>( type ) ) {
247 if ( hasDynParams( inst->params, typeVars, subst ) ) {
248 return inst;
249 }
250 }
251 return nullptr;
252}
253
254 ReferenceToType *isDynRet( FunctionType *function, const TyVarMap &forallTypes ) {
255 if ( function->get_returnVals().empty() ) return 0;
256
257 return (ReferenceToType*)isDynType( function->get_returnVals().front()->get_type(), forallTypes );
258 }
259
260const ast::BaseInstType *isDynRet(
261 const ast::FunctionType * type, const TypeVarMap & typeVars ) {
262 if ( type->returns.empty() ) return nullptr;
263
264 return isDynType( type->returns.front(), typeVars );
265}
266
267 ReferenceToType *isDynRet( FunctionType *function ) {
268 if ( function->get_returnVals().empty() ) return 0;
269
270 TyVarMap forallTypes( TypeDecl::Data{} );
271 makeTyVarMap( function, forallTypes );
272 return (ReferenceToType*)isDynType( function->get_returnVals().front()->get_type(), forallTypes );
273 }
274
275 bool needsAdapter( FunctionType *adaptee, const TyVarMap &tyVars ) {
276// if ( ! adaptee->get_returnVals().empty() && isPolyType( adaptee->get_returnVals().front()->get_type(), tyVars ) ) {
277// return true;
278// } // if
279 if ( isDynRet( adaptee, tyVars ) ) return true;
280
281 for ( std::list< DeclarationWithType* >::const_iterator innerArg = adaptee->get_parameters().begin(); innerArg != adaptee->get_parameters().end(); ++innerArg ) {
282// if ( isPolyType( (*innerArg)->get_type(), tyVars ) ) {
283 if ( isDynType( (*innerArg)->get_type(), tyVars ) ) {
284 return true;
285 } // if
286 } // for
287 return false;
288 }
289
290bool needsAdapter(
291 ast::FunctionType const * adaptee, const TypeVarMap & typeVars ) {
292 if ( isDynRet( adaptee, typeVars ) ) return true;
293
294 for ( auto param : adaptee->params ) {
295 if ( isDynType( param, typeVars ) ) {
296 return true;
297 }
298 }
299 return false;
300}
301
302 Type *isPolyPtr( Type *type, const TypeSubstitution *env ) {
303 type = replaceTypeInst( type, env );
304
305 if ( PointerType *ptr = dynamic_cast< PointerType *>( type ) ) {
306 return isPolyType( ptr->get_base(), env );
307 }
308 return 0;
309 }
310
311 Type *isPolyPtr( Type *type, const TyVarMap &tyVars, const TypeSubstitution *env ) {
312 type = replaceTypeInst( type, env );
313
314 if ( PointerType *ptr = dynamic_cast< PointerType *>( type ) ) {
315 return isPolyType( ptr->get_base(), tyVars, env );
316 }
317 return 0;
318 }
319
320 Type * hasPolyBase( Type *type, int *levels, const TypeSubstitution *env ) {
321 int dummy;
322 if ( ! levels ) { levels = &dummy; }
323 *levels = 0;
324
325 while ( true ) {
326 type = replaceTypeInst( type, env );
327
328 if ( PointerType *ptr = dynamic_cast< PointerType *>( type ) ) {
329 type = ptr->get_base();
330 ++(*levels);
331 } else break;
332 }
333
334 return isPolyType( type, env );
335 }
336
337 Type * hasPolyBase( Type *type, const TyVarMap &tyVars, int *levels, const TypeSubstitution *env ) {
338 int dummy;
339 if ( ! levels ) { levels = &dummy; }
340 *levels = 0;
341
342 while ( true ) {
343 type = replaceTypeInst( type, env );
344
345 if ( PointerType *ptr = dynamic_cast< PointerType *>( type ) ) {
346 type = ptr->get_base();
347 ++(*levels);
348 } else break;
349 }
350
351 return isPolyType( type, tyVars, env );
352 }
353
354ast::Type const * hasPolyBase(
355 ast::Type const * type, const TypeVarMap & typeVars,
356 int * levels, const ast::TypeSubstitution * subst ) {
357 int level_count = 0;
358
359 while ( true ) {
360 type = replaceTypeInst( type, subst );
361
362 if ( auto ptr = dynamic_cast<ast::PointerType const *>( type ) ) {
363 type = ptr->base;
364 ++level_count;
365 } else {
366 break;
367 }
368 }
369
370 if ( nullptr != levels ) { *levels = level_count; }
371 return isPolyType( type, typeVars, subst );
372}
373
374 bool includesPolyType( Type *type, const TypeSubstitution *env ) {
375 type = replaceTypeInst( type, env );
376
377 if ( dynamic_cast< TypeInstType * >( type ) ) {
378 return true;
379 } else if ( PointerType *pointerType = dynamic_cast< PointerType* >( type ) ) {
380 if ( includesPolyType( pointerType->get_base(), env ) ) return true;
381 } else if ( StructInstType *structType = dynamic_cast< StructInstType* >( type ) ) {
382 if ( includesPolyParams( structType->get_parameters(), env ) ) return true;
383 } else if ( UnionInstType *unionType = dynamic_cast< UnionInstType* >( type ) ) {
384 if ( includesPolyParams( unionType->get_parameters(), env ) ) return true;
385 }
386 return false;
387 }
388
389 bool includesPolyType( Type *type, const TyVarMap &tyVars, const TypeSubstitution *env ) {
390 type = replaceTypeInst( type, env );
391
392 if ( TypeInstType *typeInstType = dynamic_cast< TypeInstType * >( type ) ) {
393 if ( tyVars.find( typeInstType->get_name() ) != tyVars.end() ) {
394 return true;
395 }
396 } else if ( PointerType *pointerType = dynamic_cast< PointerType* >( type ) ) {
397 if ( includesPolyType( pointerType->get_base(), tyVars, env ) ) return true;
398 } else if ( StructInstType *structType = dynamic_cast< StructInstType* >( type ) ) {
399 if ( includesPolyParams( structType->get_parameters(), tyVars, env ) ) return true;
400 } else if ( UnionInstType *unionType = dynamic_cast< UnionInstType* >( type ) ) {
401 if ( includesPolyParams( unionType->get_parameters(), tyVars, env ) ) return true;
402 }
403 return false;
404 }
405
406 FunctionType * getFunctionType( Type *ty ) {
407 PointerType *ptrType;
408 if ( ( ptrType = dynamic_cast< PointerType* >( ty ) ) ) {
409 return dynamic_cast< FunctionType* >( ptrType->get_base() ); // pointer if FunctionType, NULL otherwise
410 } else {
411 return dynamic_cast< FunctionType* >( ty ); // pointer if FunctionType, NULL otherwise
412 }
413 }
414
415 const ast::FunctionType * getFunctionType( const ast::Type * ty ) {
416 if ( auto pty = dynamic_cast< const ast::PointerType * >( ty ) ) {
417 return pty->base.as< ast::FunctionType >();
418 } else {
419 return dynamic_cast< const ast::FunctionType * >( ty );
420 }
421 }
422
423 VariableExpr * getBaseVar( Expression *expr, int *levels ) {
424 int dummy;
425 if ( ! levels ) { levels = &dummy; }
426 *levels = 0;
427
428 while ( true ) {
429 if ( VariableExpr *varExpr = dynamic_cast< VariableExpr* >( expr ) ) {
430 return varExpr;
431 } else if ( MemberExpr *memberExpr = dynamic_cast< MemberExpr* >( expr ) ) {
432 expr = memberExpr->get_aggregate();
433 } else if ( AddressExpr *addressExpr = dynamic_cast< AddressExpr* >( expr ) ) {
434 expr = addressExpr->get_arg();
435 } else if ( UntypedExpr *untypedExpr = dynamic_cast< UntypedExpr* >( expr ) ) {
436 // look for compiler-inserted dereference operator
437 NameExpr *fn = dynamic_cast< NameExpr* >( untypedExpr->get_function() );
438 if ( ! fn || fn->get_name() != std::string("*?") ) return 0;
439 expr = *untypedExpr->begin_args();
440 } else if ( CommaExpr *commaExpr = dynamic_cast< CommaExpr* >( expr ) ) {
441 // copy constructors insert comma exprs, look at second argument which contains the variable
442 expr = commaExpr->get_arg2();
443 continue;
444 } else if ( ConditionalExpr * condExpr = dynamic_cast< ConditionalExpr * >( expr ) ) {
445 int lvl1;
446 int lvl2;
447 VariableExpr * var1 = getBaseVar( condExpr->get_arg2(), &lvl1 );
448 VariableExpr * var2 = getBaseVar( condExpr->get_arg3(), &lvl2 );
449 if ( lvl1 == lvl2 && var1 && var2 && var1->get_var() == var2->get_var() ) {
450 *levels = lvl1;
451 return var1;
452 }
453 break;
454 } else break;
455
456 ++(*levels);
457 }
458
459 return 0;
460 }
461
462 namespace {
463 /// Checks if is a pointer to D
464 template<typename D, typename B>
465 bool is( const B* p ) { return type_index{typeid(D)} == type_index{typeid(*p)}; }
466
467 /// Converts to a pointer to D without checking for safety
468 template<typename D, typename B>
469 inline D* as( B* p ) { return reinterpret_cast<D*>(p); }
470
471 template<typename D, typename B>
472 inline D const * as( B const * p ) {
473 return reinterpret_cast<D const *>( p );
474 }
475
476 /// Flattens a declaration list
477 template<typename Output>
478 void flattenList( list< DeclarationWithType* > src, Output out ) {
479 for ( DeclarationWithType* decl : src ) {
480 ResolvExpr::flatten( decl->get_type(), out );
481 }
482 }
483
484 /// Flattens a list of types
485 template<typename Output>
486 void flattenList( list< Type* > src, Output out ) {
487 for ( Type* ty : src ) {
488 ResolvExpr::flatten( ty, out );
489 }
490 }
491
492 void flattenList( vector<ast::ptr<ast::Type>> const & src,
493 vector<ast::ptr<ast::Type>> & out ) {
494 for ( auto const & type : src ) {
495 ResolvExpr::flatten( type, out );
496 }
497 }
498
499 /// Checks if two lists of parameters are equal up to polymorphic substitution.
500 bool paramListsPolyCompatible( const list< Expression* >& aparams, const list< Expression* >& bparams ) {
501 if ( aparams.size() != bparams.size() ) return false;
502
503 for ( list< Expression* >::const_iterator at = aparams.begin(), bt = bparams.begin();
504 at != aparams.end(); ++at, ++bt ) {
505 TypeExpr *aparam = dynamic_cast< TypeExpr* >(*at);
506 assertf(aparam, "Aggregate parameters should be type expressions");
507 TypeExpr *bparam = dynamic_cast< TypeExpr* >(*bt);
508 assertf(bparam, "Aggregate parameters should be type expressions");
509
510 // xxx - might need to let VoidType be a wildcard here too; could have some voids
511 // stuffed in for dtype-statics.
512 // if ( is<VoidType>( aparam->get_type() ) || is<VoidType>( bparam->get_type() ) ) continue;
513 if ( ! typesPolyCompatible( aparam->get_type(), bparam->get_type() ) ) return false;
514 }
515
516 return true;
517 }
518
519 bool paramListsPolyCompatible(
520 std::vector<ast::ptr<ast::Expr>> const & lparams,
521 std::vector<ast::ptr<ast::Expr>> const & rparams ) {
522 if ( lparams.size() != rparams.size() ) {
523 return false;
524 }
525
526 for ( auto lparam = lparams.begin(), rparam = rparams.begin() ;
527 lparam != lparams.end() ; ++lparam, ++rparam ) {
528 ast::TypeExpr const * lexpr = lparam->as<ast::TypeExpr>();
529 assertf( lexpr, "Aggregate parameters should be type expressions" );
530 ast::TypeExpr const * rexpr = rparam->as<ast::TypeExpr>();
531 assertf( rexpr, "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>( lexpr->type() ) || is<VoidType>( bparam->get_type() ) ) continue;
536 if ( !typesPolyCompatible( lexpr->type, rexpr->type ) ) {
537 return false;
538 }
539 }
540
541 return true;
542 }
543 }
544
545 bool typesPolyCompatible( Type *a, Type *b ) {
546 type_index aid{ typeid(*a) };
547 // polymorphic types always match
548 if ( aid == type_index{typeid(TypeInstType)} ) return true;
549
550 type_index bid{ typeid(*b) };
551 // polymorphic types always match
552 if ( bid == type_index{typeid(TypeInstType)} ) return true;
553
554 // can't match otherwise if different types
555 if ( aid != bid ) return false;
556
557 // recurse through type structure (conditions borrowed from Unify.cc)
558 if ( aid == type_index{typeid(BasicType)} ) {
559 return as<BasicType>(a)->get_kind() == as<BasicType>(b)->get_kind();
560 } else if ( aid == type_index{typeid(PointerType)} ) {
561 PointerType *ap = as<PointerType>(a), *bp = as<PointerType>(b);
562
563 // void pointers should match any other pointer type
564 return is<VoidType>( ap->get_base() ) || is<VoidType>( bp->get_base() )
565 || typesPolyCompatible( ap->get_base(), bp->get_base() );
566 } else if ( aid == type_index{typeid(ReferenceType)} ) {
567 ReferenceType *ap = as<ReferenceType>(a), *bp = as<ReferenceType>(b);
568 return is<VoidType>( ap->get_base() ) || is<VoidType>( bp->get_base() )
569 || typesPolyCompatible( ap->get_base(), bp->get_base() );
570 } else if ( aid == type_index{typeid(ArrayType)} ) {
571 ArrayType *aa = as<ArrayType>(a), *ba = as<ArrayType>(b);
572
573 if ( aa->get_isVarLen() ) {
574 if ( ! ba->get_isVarLen() ) return false;
575 } else {
576 if ( ba->get_isVarLen() ) return false;
577
578 ConstantExpr *ad = dynamic_cast<ConstantExpr*>( aa->get_dimension() );
579 ConstantExpr *bd = dynamic_cast<ConstantExpr*>( ba->get_dimension() );
580 if ( ad && bd
581 && ad->get_constant()->get_value() != bd->get_constant()->get_value() )
582 return false;
583 }
584
585 return typesPolyCompatible( aa->get_base(), ba->get_base() );
586 } else if ( aid == type_index{typeid(FunctionType)} ) {
587 FunctionType *af = as<FunctionType>(a), *bf = as<FunctionType>(b);
588
589 vector<Type*> aparams, bparams;
590 flattenList( af->get_parameters(), back_inserter( aparams ) );
591 flattenList( bf->get_parameters(), back_inserter( bparams ) );
592 if ( aparams.size() != bparams.size() ) return false;
593
594 vector<Type*> areturns, breturns;
595 flattenList( af->get_returnVals(), back_inserter( areturns ) );
596 flattenList( bf->get_returnVals(), back_inserter( breturns ) );
597 if ( areturns.size() != breturns.size() ) return false;
598
599 for ( unsigned i = 0; i < aparams.size(); ++i ) {
600 if ( ! typesPolyCompatible( aparams[i], bparams[i] ) ) return false;
601 }
602 for ( unsigned i = 0; i < areturns.size(); ++i ) {
603 if ( ! typesPolyCompatible( areturns[i], breturns[i] ) ) return false;
604 }
605 return true;
606 } else if ( aid == type_index{typeid(StructInstType)} ) {
607 StructInstType *aa = as<StructInstType>(a), *ba = as<StructInstType>(b);
608
609 if ( aa->get_name() != ba->get_name() ) return false;
610 return paramListsPolyCompatible( aa->get_parameters(), ba->get_parameters() );
611 } else if ( aid == type_index{typeid(UnionInstType)} ) {
612 UnionInstType *aa = as<UnionInstType>(a), *ba = as<UnionInstType>(b);
613
614 if ( aa->get_name() != ba->get_name() ) return false;
615 return paramListsPolyCompatible( aa->get_parameters(), ba->get_parameters() );
616 } else if ( aid == type_index{typeid(EnumInstType)} ) {
617 return as<EnumInstType>(a)->get_name() == as<EnumInstType>(b)->get_name();
618 } else if ( aid == type_index{typeid(TraitInstType)} ) {
619 return as<TraitInstType>(a)->get_name() == as<TraitInstType>(b)->get_name();
620 } else if ( aid == type_index{typeid(TupleType)} ) {
621 TupleType *at = as<TupleType>(a), *bt = as<TupleType>(b);
622
623 vector<Type*> atypes, btypes;
624 flattenList( at->get_types(), back_inserter( atypes ) );
625 flattenList( bt->get_types(), back_inserter( btypes ) );
626 if ( atypes.size() != btypes.size() ) return false;
627
628 for ( unsigned i = 0; i < atypes.size(); ++i ) {
629 if ( ! typesPolyCompatible( atypes[i], btypes[i] ) ) return false;
630 }
631 return true;
632 } else return true; // VoidType, VarArgsType, ZeroType & OneType just need the same type
633 }
634
635bool typesPolyCompatible( ast::Type const * lhs, ast::Type const * rhs ) {
636 type_index const lid = typeid(*lhs);
637
638 // Polymorphic types always match:
639 if ( type_index(typeid(ast::TypeInstType)) == lid ) return true;
640
641 type_index const rid = typeid(*rhs);
642 if ( type_index(typeid(ast::TypeInstType)) == rid ) return true;
643
644 // All other types only match if they are the same type:
645 if ( lid != rid ) return false;
646
647 // So remaining types can be examined case by case.
648 // Recurse through type structure (conditions borrowed from Unify.cc).
649
650 if ( type_index(typeid(ast::BasicType)) == lid ) {
651 return as<ast::BasicType>(lhs)->kind == as<ast::BasicType>(rhs)->kind;
652 } else if ( type_index(typeid(ast::PointerType)) == lid ) {
653 ast::PointerType const * l = as<ast::PointerType>(lhs);
654 ast::PointerType const * r = as<ast::PointerType>(rhs);
655
656 // void pointers should match any other pointer type.
657 return is<ast::VoidType>( l->base.get() )
658 || is<ast::VoidType>( r->base.get() )
659 || typesPolyCompatible( l->base.get(), r->base.get() );
660 } else if ( type_index(typeid(ast::ReferenceType)) == lid ) {
661 ast::ReferenceType const * l = as<ast::ReferenceType>(lhs);
662 ast::ReferenceType const * r = as<ast::ReferenceType>(rhs);
663
664 // void references should match any other reference type.
665 return is<ast::VoidType>( l->base.get() )
666 || is<ast::VoidType>( r->base.get() )
667 || typesPolyCompatible( l->base.get(), r->base.get() );
668 } else if ( type_index(typeid(ast::ArrayType)) == lid ) {
669 ast::ArrayType const * l = as<ast::ArrayType>(lhs);
670 ast::ArrayType const * r = as<ast::ArrayType>(rhs);
671
672 if ( l->isVarLen ) {
673 if ( !r->isVarLen ) return false;
674 } else {
675 if ( r->isVarLen ) return false;
676
677 auto lc = l->dimension.as<ast::ConstantExpr>();
678 auto rc = r->dimension.as<ast::ConstantExpr>();
679 if ( lc && rc && lc->intValue() != rc->intValue() ) {
680 return false;
681 }
682 }
683
684 return typesPolyCompatible( l->base.get(), r->base.get() );
685 } else if ( type_index(typeid(ast::FunctionType)) == lid ) {
686 ast::FunctionType const * l = as<ast::FunctionType>(lhs);
687 ast::FunctionType const * r = as<ast::FunctionType>(rhs);
688
689 std::vector<ast::ptr<ast::Type>> lparams, rparams;
690 flattenList( l->params, lparams );
691 flattenList( r->params, rparams );
692 if ( lparams.size() != rparams.size() ) return false;
693 for ( unsigned i = 0; i < lparams.size(); ++i ) {
694 if ( !typesPolyCompatible( lparams[i], rparams[i] ) ) return false;
695 }
696
697 std::vector<ast::ptr<ast::Type>> lrets, rrets;
698 flattenList( l->returns, lrets );
699 flattenList( r->returns, rrets );
700 if ( lrets.size() != rrets.size() ) return false;
701 for ( unsigned i = 0; i < lrets.size(); ++i ) {
702 if ( !typesPolyCompatible( lrets[i], rrets[i] ) ) return false;
703 }
704 return true;
705 } else if ( type_index(typeid(ast::StructInstType)) == lid ) {
706 ast::StructInstType const * l = as<ast::StructInstType>(lhs);
707 ast::StructInstType const * r = as<ast::StructInstType>(rhs);
708
709 if ( l->name != r->name ) return false;
710 return paramListsPolyCompatible( l->params, r->params );
711 } else if ( type_index(typeid(ast::UnionInstType)) == lid ) {
712 ast::UnionInstType const * l = as<ast::UnionInstType>(lhs);
713 ast::UnionInstType const * r = as<ast::UnionInstType>(rhs);
714
715 if ( l->name != r->name ) return false;
716 return paramListsPolyCompatible( l->params, r->params );
717 } else if ( type_index(typeid(ast::EnumInstType)) == lid ) {
718 ast::EnumInstType const * l = as<ast::EnumInstType>(lhs);
719 ast::EnumInstType const * r = as<ast::EnumInstType>(rhs);
720
721 return l->name == r->name;
722 } else if ( type_index(typeid(ast::TraitInstType)) == lid ) {
723 ast::TraitInstType const * l = as<ast::TraitInstType>(lhs);
724 ast::TraitInstType const * r = as<ast::TraitInstType>(rhs);
725
726 return l->name == r->name;
727 } else if ( type_index(typeid(ast::TupleType)) == lid ) {
728 ast::TupleType const * l = as<ast::TupleType>(lhs);
729 ast::TupleType const * r = as<ast::TupleType>(rhs);
730
731 std::vector<ast::ptr<ast::Type>> ltypes, rtypes;
732 flattenList( l->types, ( ltypes ) );
733 flattenList( r->types, ( rtypes ) );
734 if ( ltypes.size() != rtypes.size() ) return false;
735
736 for ( unsigned i = 0 ; i < ltypes.size() ; ++i ) {
737 if ( !typesPolyCompatible( ltypes[i], rtypes[i] ) ) return false;
738 }
739 return true;
740 // The remaining types (VoidType, VarArgsType, ZeroType & OneType)
741 // have no variation so will always be equal.
742 } else {
743 return true;
744 }
745}
746
747 bool needsBoxing( Type * param, Type * arg, const TyVarMap &exprTyVars, const TypeSubstitution * env ) {
748 // is parameter is not polymorphic, don't need to box
749 if ( ! isPolyType( param, exprTyVars ) ) return false;
750 Type * newType = arg->clone();
751 if ( env ) env->apply( newType );
752 std::unique_ptr<Type> manager( newType );
753 // if the argument's type is polymorphic, we don't need to box again!
754 return ! isPolyType( newType );
755 }
756
757bool needsBoxing( const ast::Type * param, const ast::Type * arg,
758 const TypeVarMap & typeVars, const ast::TypeSubstitution * subst ) {
759 // Don't need to box if the parameter is not polymorphic.
760 if ( !isPolyType( param, typeVars ) ) return false;
761
762 ast::ptr<ast::Type> newType = arg;
763 if ( subst ) {
764 int count = subst->apply( newType );
765 (void)count;
766 }
767 // Only need to box if the argument is not also polymorphic.
768 return !isPolyType( newType );
769}
770
771 bool needsBoxing( Type * param, Type * arg, ApplicationExpr * appExpr, const TypeSubstitution * env ) {
772 FunctionType * function = getFunctionType( appExpr->function->result );
773 assertf( function, "ApplicationExpr has non-function type: %s", toString( appExpr->function->result ).c_str() );
774 TyVarMap exprTyVars( TypeDecl::Data{} );
775 makeTyVarMap( function, exprTyVars );
776 return needsBoxing( param, arg, exprTyVars, env );
777 }
778
779bool needsBoxing(
780 const ast::Type * param, const ast::Type * arg,
781 const ast::ApplicationExpr * expr,
782 const ast::TypeSubstitution * subst ) {
783 const ast::FunctionType * function = getFunctionType( expr->func->result );
784 assertf( function, "ApplicationExpr has non-function type: %s", toString( expr->func->result ).c_str() );
785 TypeVarMap exprTyVars = { ast::TypeData() };
786 makeTypeVarMap( function, exprTyVars );
787 return needsBoxing( param, arg, exprTyVars, subst );
788}
789
790 void addToTyVarMap( TypeDecl * tyVar, TyVarMap &tyVarMap ) {
791 tyVarMap.insert( tyVar->name, TypeDecl::Data{ tyVar } );
792 }
793
794void addToTypeVarMap( const ast::TypeInstType * type, TypeVarMap & typeVars ) {
795 typeVars.insert( *type, ast::TypeData( type->base ) );
796}
797
798 void makeTyVarMap( Type *type, TyVarMap &tyVarMap ) {
799 for ( Type::ForallList::const_iterator tyVar = type->get_forall().begin(); tyVar != type->get_forall().end(); ++tyVar ) {
800 assert( *tyVar );
801 addToTyVarMap( *tyVar, tyVarMap );
802 }
803 if ( PointerType *pointer = dynamic_cast< PointerType* >( type ) ) {
804 makeTyVarMap( pointer->get_base(), tyVarMap );
805 }
806 }
807
808void makeTypeVarMap( const ast::Type * type, TypeVarMap & typeVars ) {
809 if ( auto func = dynamic_cast<ast::FunctionType const *>( type ) ) {
810 for ( auto & typeVar : func->forall ) {
811 assert( typeVar );
812 addToTypeVarMap( typeVar, typeVars );
813 }
814 }
815 if ( auto pointer = dynamic_cast<ast::PointerType const *>( type ) ) {
816 makeTypeVarMap( pointer->base, typeVars );
817 }
818}
819
820 void printTyVarMap( std::ostream &os, const TyVarMap &tyVarMap ) {
821 for ( TyVarMap::const_iterator i = tyVarMap.begin(); i != tyVarMap.end(); ++i ) {
822 os << i->first << " (" << i->second << ") ";
823 } // for
824 os << std::endl;
825 }
826
827} // namespace GenPoly
828
829// Local Variables: //
830// tab-width: 4 //
831// mode: c++ //
832// compile-command: "make install" //
833// End: //
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