source: src/GenPoly/GenPoly.cc@ 8fd1b7c

ADT ast-experimental
Last change on this file since 8fd1b7c was c97b448, checked in by Andrew Beach <ajbeach@…>, 3 years 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
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.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
202const 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
234const 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
262const 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
277const 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
300bool 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
330const 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
375ast::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
658bool 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
780bool 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
802bool 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
817void addToTypeVarMap( const ast::TypeDecl * decl, TypeVarMap & typeVars ) {
818 typeVars.insert( ast::TypeEnvKey( decl, 0, 0 ), ast::TypeData( decl ) );
819}
820
821void 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
835void 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
847void 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: //
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