source: src/SymTab/ValidateType.cc@ ffec1bf

ADT ast-experimental pthread-emulation qualifiedEnum
Last change on this file since ffec1bf was 1df492a, checked in by JiadaL <j82liang@…>, 3 years ago

Convert TypeInstType to PointerType before resolution
  • Property mode set to 100644
File size: 17.0 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// ValidateType.cc -- Validate and normalize types.
8//
9// Author : Andrew Beach
10// Created On : Mon May 16 16:21:00 2022
11// Last Modified By : Andrew Beach
12// Last Modified On : Tue May 17 14:06:00 2022
13// Update Count : 0
14//
15
16#include "ValidateType.h"
17
18#include "CodeGen/OperatorTable.h"
19#include "Common/PassVisitor.h"
20#include "SymTab/FixFunction.h"
21#include "SynTree/Declaration.h"
22#include "SynTree/Type.h"
23
24namespace SymTab {
25
26namespace {
27
28/// Replaces enum types by int, and function or array types in function
29/// parameter and return lists by appropriate pointers.
30struct EnumAndPointerDecay_old {
31 void previsit( EnumDecl * aggregateDecl );
32 void previsit( FunctionType * func );
33};
34
35void EnumAndPointerDecay_old::previsit( EnumDecl * enumDecl ) {
36 // Set the type of each member of the enumeration to be EnumConstant
37 for ( std::list< Declaration * >::iterator i = enumDecl->members.begin(); i != enumDecl->members.end(); ++i ) {
38 ObjectDecl * obj = dynamic_cast< ObjectDecl * >( * i );
39 assert( obj );
40 obj->set_type( new EnumInstType( Type::Qualifiers( Type::Const ), enumDecl->name ) );
41 } // for
42}
43
44template< typename DWTList >
45void fixFunctionList( DWTList & dwts, bool isVarArgs, FunctionType * func ) {
46 auto nvals = dwts.size();
47 bool containsVoid = false;
48 for ( auto & dwt : dwts ) {
49 // fix each DWT and record whether a void was found
50 containsVoid |= fixFunction( dwt );
51 }
52
53 // the only case in which "void" is valid is where it is the only one in the list
54 if ( containsVoid && ( nvals > 1 || isVarArgs ) ) {
55 SemanticError( func, "invalid type void in function type " );
56 }
57
58 // one void is the only thing in the list; remove it.
59 if ( containsVoid ) {
60 delete dwts.front();
61 dwts.clear();
62 }
63}
64
65void EnumAndPointerDecay_old::previsit( FunctionType * func ) {
66 // Fix up parameters and return types
67 fixFunctionList( func->parameters, func->isVarArgs, func );
68 fixFunctionList( func->returnVals, false, func );
69}
70
71/// Associates forward declarations of aggregates with their definitions
72struct LinkReferenceToTypes_old final : public WithIndexer, public WithGuards, public WithVisitorRef<LinkReferenceToTypes_old>, public WithShortCircuiting {
73 LinkReferenceToTypes_old( const Indexer * indexer );
74
75 void postvisit( TypeInstType * typeInst );
76
77 void postvisit( EnumInstType * enumInst );
78 void postvisit( StructInstType * structInst );
79 void postvisit( UnionInstType * unionInst );
80 void postvisit( TraitInstType * traitInst );
81 void previsit( QualifiedType * qualType );
82 void postvisit( QualifiedType * qualType );
83
84 void postvisit( EnumDecl * enumDecl );
85 void postvisit( StructDecl * structDecl );
86 void postvisit( UnionDecl * unionDecl );
87 void postvisit( TraitDecl * traitDecl );
88
89 void previsit( StructDecl * structDecl );
90 void previsit( UnionDecl * unionDecl );
91
92 void renameGenericParams( std::list< TypeDecl * > & params );
93
94private:
95 const Indexer * local_indexer;
96
97 typedef std::map< std::string, std::list< EnumInstType * > > ForwardEnumsType;
98 typedef std::map< std::string, std::list< StructInstType * > > ForwardStructsType;
99 typedef std::map< std::string, std::list< UnionInstType * > > ForwardUnionsType;
100 ForwardEnumsType forwardEnums;
101 ForwardStructsType forwardStructs;
102 ForwardUnionsType forwardUnions;
103 /// true if currently in a generic type body, so that type parameter instances can be renamed appropriately
104 bool inGeneric = false;
105};
106
107
108LinkReferenceToTypes_old::LinkReferenceToTypes_old( const Indexer * other_indexer ) : WithIndexer( false ) {
109 if ( other_indexer ) {
110 local_indexer = other_indexer;
111 } else {
112 local_indexer = &indexer;
113 } // if
114}
115
116void LinkReferenceToTypes_old::postvisit( EnumInstType * enumInst ) {
117 const EnumDecl * st = local_indexer->lookupEnum( enumInst->name );
118 // it's not a semantic error if the enum is not found, just an implicit forward declaration
119 if ( st ) {
120 enumInst->baseEnum = const_cast<EnumDecl *>(st); // Just linking in the node
121 } // if
122 if ( ! st || ! st->body ) {
123 // use of forward declaration
124 forwardEnums[ enumInst->name ].push_back( enumInst );
125 } // if
126}
127
128void LinkReferenceToTypes_old::postvisit( StructInstType * structInst ) {
129 const StructDecl * st = local_indexer->lookupStruct( structInst->name );
130 // it's not a semantic error if the struct is not found, just an implicit forward declaration
131 if ( st ) {
132 structInst->baseStruct = const_cast<StructDecl *>(st); // Just linking in the node
133 } // if
134 if ( ! st || ! st->body ) {
135 // use of forward declaration
136 forwardStructs[ structInst->name ].push_back( structInst );
137 } // if
138}
139
140void LinkReferenceToTypes_old::postvisit( UnionInstType * unionInst ) {
141 const UnionDecl * un = local_indexer->lookupUnion( unionInst->name );
142 // it's not a semantic error if the union is not found, just an implicit forward declaration
143 if ( un ) {
144 unionInst->baseUnion = const_cast<UnionDecl *>(un); // Just linking in the node
145 } // if
146 if ( ! un || ! un->body ) {
147 // use of forward declaration
148 forwardUnions[ unionInst->name ].push_back( unionInst );
149 } // if
150}
151
152void LinkReferenceToTypes_old::previsit( QualifiedType * ) {
153 visit_children = false;
154}
155
156void LinkReferenceToTypes_old::postvisit( QualifiedType * qualType ) {
157 // linking only makes sense for the 'oldest ancestor' of the qualified type
158 qualType->parent->accept( * visitor );
159}
160
161// expand assertions from trait instance, performing the appropriate type variable substitutions
162template< typename Iterator >
163void expandAssertions( TraitInstType * inst, Iterator out ) {
164 assertf( inst->baseTrait, "Trait instance not linked to base trait: %s", toCString( inst ) );
165 std::list< DeclarationWithType * > asserts;
166 for ( Declaration * decl : inst->baseTrait->members ) {
167 asserts.push_back( strict_dynamic_cast<DeclarationWithType *>( decl->clone() ) );
168 }
169 // substitute trait decl parameters for instance parameters
170 applySubstitution( inst->baseTrait->parameters.begin(), inst->baseTrait->parameters.end(), inst->parameters.begin(), asserts.begin(), asserts.end(), out );
171}
172
173void LinkReferenceToTypes_old::postvisit( TraitDecl * traitDecl ) {
174 if ( traitDecl->name == "sized" ) {
175 // "sized" is a special trait - flick the sized status on for the type variable
176 assertf( traitDecl->parameters.size() == 1, "Built-in trait 'sized' has incorrect number of parameters: %zd", traitDecl->parameters.size() );
177 TypeDecl * td = traitDecl->parameters.front();
178 td->set_sized( true );
179 }
180
181 // move assertions from type parameters into the body of the trait
182 for ( TypeDecl * td : traitDecl->parameters ) {
183 for ( DeclarationWithType * assert : td->assertions ) {
184 if ( TraitInstType * inst = dynamic_cast< TraitInstType * >( assert->get_type() ) ) {
185 expandAssertions( inst, back_inserter( traitDecl->members ) );
186 } else {
187 traitDecl->members.push_back( assert->clone() );
188 }
189 }
190 deleteAll( td->assertions );
191 td->assertions.clear();
192 } // for
193}
194
195void LinkReferenceToTypes_old::postvisit( TraitInstType * traitInst ) {
196 // handle other traits
197 const TraitDecl * traitDecl = local_indexer->lookupTrait( traitInst->name );
198 if ( ! traitDecl ) {
199 SemanticError( traitInst->location, "use of undeclared trait " + traitInst->name );
200 } // if
201 if ( traitDecl->parameters.size() != traitInst->parameters.size() ) {
202 SemanticError( traitInst, "incorrect number of trait parameters: " );
203 } // if
204 traitInst->baseTrait = const_cast<TraitDecl *>(traitDecl); // Just linking in the node
205
206 // need to carry over the 'sized' status of each decl in the instance
207 for ( auto p : group_iterate( traitDecl->parameters, traitInst->parameters ) ) {
208 TypeExpr * expr = dynamic_cast< TypeExpr * >( std::get<1>(p) );
209 if ( ! expr ) {
210 SemanticError( std::get<1>(p), "Expression parameters for trait instances are currently unsupported: " );
211 }
212 if ( TypeInstType * inst = dynamic_cast< TypeInstType * >( expr->get_type() ) ) {
213 TypeDecl * formalDecl = std::get<0>(p);
214 TypeDecl * instDecl = inst->baseType;
215 if ( formalDecl->get_sized() ) instDecl->set_sized( true );
216 }
217 }
218 // normalizeAssertions( traitInst->members );
219}
220
221void LinkReferenceToTypes_old::postvisit( EnumDecl * enumDecl ) {
222 // visit enum members first so that the types of self-referencing members are updated properly
223 // Replace the enum base; right now it works only for StructEnum
224 if ( enumDecl->base ) {
225 if ( const TypeInstType * base = dynamic_cast< TypeInstType * >(enumDecl->base) ) {
226 if ( const StructDecl * decl = local_indexer->lookupStruct( base->name ) ) {
227 enumDecl->base = new StructInstType( Type::Qualifiers(), const_cast< StructDecl * >( decl ) ); // Just linking in the node
228 }
229 } else if ( const PointerType * ptr = dynamic_cast< PointerType * >(enumDecl->base) ) {
230 if ( const TypeInstType * ptrBase = dynamic_cast< TypeInstType * >( ptr->base ) ) {
231 if ( const StructDecl * decl = local_indexer->lookupStruct( ptrBase->name ) ) {
232 enumDecl->base = new PointerType( Type::Qualifiers(),
233 new StructInstType( Type::Qualifiers(), const_cast< StructDecl * >( decl ) ) );
234 }
235 }
236 }
237 }
238
239 if ( enumDecl->body ) {
240 ForwardEnumsType::iterator fwds = forwardEnums.find( enumDecl->name );
241 if ( fwds != forwardEnums.end() ) {
242 for ( std::list< EnumInstType * >::iterator inst = fwds->second.begin(); inst != fwds->second.end(); ++inst ) {
243 (* inst)->baseEnum = enumDecl;
244 } // for
245 forwardEnums.erase( fwds );
246 } // if
247 } // if
248}
249
250void LinkReferenceToTypes_old::renameGenericParams( std::list< TypeDecl * > & params ) {
251 // rename generic type parameters uniquely so that they do not conflict with user-defined function forall parameters, e.g.
252 // forall(otype T)
253 // struct Box {
254 // T x;
255 // };
256 // forall(otype T)
257 // void f(Box(T) b) {
258 // ...
259 // }
260 // The T in Box and the T in f are different, so internally the naming must reflect that.
261 GuardValue( inGeneric );
262 inGeneric = ! params.empty();
263 for ( TypeDecl * td : params ) {
264 td->name = "__" + td->name + "_generic_";
265 }
266}
267
268void LinkReferenceToTypes_old::previsit( StructDecl * structDecl ) {
269 renameGenericParams( structDecl->parameters );
270}
271
272void LinkReferenceToTypes_old::previsit( UnionDecl * unionDecl ) {
273 renameGenericParams( unionDecl->parameters );
274}
275
276void LinkReferenceToTypes_old::postvisit( StructDecl * structDecl ) {
277 // visit struct members first so that the types of self-referencing members are updated properly
278 // xxx - need to ensure that type parameters match up between forward declarations and definition (most importantly, number of type parameters and their def>
279 if ( structDecl->body ) {
280 ForwardStructsType::iterator fwds = forwardStructs.find( structDecl->name );
281 if ( fwds != forwardStructs.end() ) {
282 for ( std::list< StructInstType * >::iterator inst = fwds->second.begin(); inst != fwds->second.end(); ++inst ) {
283 (* inst)->baseStruct = structDecl;
284 } // for
285 forwardStructs.erase( fwds );
286 } // if
287 } // if
288}
289
290void LinkReferenceToTypes_old::postvisit( UnionDecl * unionDecl ) {
291 if ( unionDecl->body ) {
292 ForwardUnionsType::iterator fwds = forwardUnions.find( unionDecl->name );
293 if ( fwds != forwardUnions.end() ) {
294 for ( std::list< UnionInstType * >::iterator inst = fwds->second.begin(); inst != fwds->second.end(); ++inst ) {
295 (* inst)->baseUnion = unionDecl;
296 } // for
297 forwardUnions.erase( fwds );
298 } // if
299 } // if
300}
301
302void LinkReferenceToTypes_old::postvisit( TypeInstType * typeInst ) {
303 // ensure generic parameter instances are renamed like the base type
304 if ( inGeneric && typeInst->baseType ) typeInst->name = typeInst->baseType->name;
305 if ( const NamedTypeDecl * namedTypeDecl = local_indexer->lookupType( typeInst->name ) ) {
306 if ( const TypeDecl * typeDecl = dynamic_cast< const TypeDecl * >( namedTypeDecl ) ) {
307 typeInst->set_isFtype( typeDecl->kind == TypeDecl::Ftype );
308 } // if
309 } // if
310}
311
312/* // expand assertions from trait instance, performing the appropriate type variable substitutions
313template< typename Iterator >
314void expandAssertions( TraitInstType * inst, Iterator out ) {
315 assertf( inst->baseTrait, "Trait instance not linked to base trait: %s", toCString( inst ) );
316 std::list< DeclarationWithType * > asserts;
317 for ( Declaration * decl : inst->baseTrait->members ) {
318 asserts.push_back( strict_dynamic_cast<DeclarationWithType *>( decl->clone() ) );
319 }
320 // substitute trait decl parameters for instance parameters
321 applySubstitution( inst->baseTrait->parameters.begin(), inst->baseTrait->parameters.end(), inst->parameters.begin(), asserts.begin(), asserts.end(), out );
322}*/
323
324/// Replace all traits in assertion lists with their assertions.
325void expandTraits( std::list< TypeDecl * > & forall ) {
326 for ( TypeDecl * type : forall ) {
327 std::list< DeclarationWithType * > asserts;
328 asserts.splice( asserts.end(), type->assertions );
329 // expand trait instances into their members
330 for ( DeclarationWithType * assertion : asserts ) {
331 if ( TraitInstType * traitInst = dynamic_cast< TraitInstType * >( assertion->get_type() ) ) {
332 // expand trait instance into all of its members
333 expandAssertions( traitInst, back_inserter( type->assertions ) );
334 delete traitInst;
335 } else {
336 // pass other assertions through
337 type->assertions.push_back( assertion );
338 } // if
339 } // for
340 } // for
341}
342
343struct TraitExpander_old final {
344 void previsit( FunctionType * type ) {
345 expandTraits( type->forall );
346 }
347 void previsit( StructDecl * decl ) {
348 expandTraits( decl->parameters );
349 }
350 void previsit( UnionDecl * decl ) {
351 expandTraits( decl->parameters );
352 }
353};
354
355/*struct TraitExpander_old final {
356 void previsit( FunctionType * );
357 void previsit( StructDecl * );
358 void previsit( UnionDecl * );
359};
360
361void TraitExpander_old::previsit( FunctionType * ftype ) {
362 expandTraits( ftype->forall );
363}
364
365void TraitExpander_old::previsit( StructDecl * aggrDecl ) {
366 expandTraits( aggrDecl->parameters );
367}
368
369void TraitExpander_old::previsit( UnionDecl * aggrDecl ) {
370 expandTraits( aggrDecl->parameters );
371}*/
372
373/// Fix each function in the assertion list and check for invalid void type.
374void fixAssertions(
375 std::list< TypeDecl * > & forall, BaseSyntaxNode * node ) {
376 for ( TypeDecl * type : forall ) {
377 for ( DeclarationWithType *& assertion : type->assertions ) {
378 bool isVoid = fixFunction( assertion );
379 if ( isVoid ) {
380 SemanticError( node, "invalid type void in assertion of function " );
381 } // if
382 } // for
383 }
384}
385
386struct AssertionFixer_old final {
387 void previsit( FunctionType * type ) {
388 fixAssertions( type->forall, type );
389 }
390 void previsit( StructDecl * decl ) {
391 fixAssertions( decl->parameters, decl );
392 }
393 void previsit( UnionDecl * decl ) {
394 fixAssertions( decl->parameters, decl );
395 }
396};
397
398/*
399struct AssertionFixer_old final {
400 void previsit( FunctionType * );
401 void previsit( StructDecl * );
402 void previsit( UnionDecl * );
403};
404
405void AssertionFixer_old::previsit( FunctionType * ftype ) {
406 fixAssertions( ftype->forall, ftype );
407}
408
409void AssertionFixer_old::previsit( StructDecl * aggrDecl ) {
410 fixAssertions( aggrDecl->parameters, aggrDecl );
411}
412
413void AssertionFixer_old::previsit( UnionDecl * aggrDecl ) {
414 fixAssertions( aggrDecl->parameters, aggrDecl );
415}*/
416
417struct CheckOperatorTypes_old final {
418 void previsit( ObjectDecl * );
419};
420
421void CheckOperatorTypes_old::previsit( ObjectDecl * object ) {
422 // ensure that operator names only apply to functions or function pointers
423 if ( CodeGen::isOperator( object->name ) && ! dynamic_cast< FunctionType * >( object->type->stripDeclarator() ) ) {
424 SemanticError( object->location, toCString( "operator ", object->name.c_str(), " is not a function or function pointer." ) );
425 }
426}
427
428struct FixUniqueIds_old final {
429 void previsit( DeclarationWithType * decl ) {
430 decl->fixUniqueId();
431 }
432};
433
434//void FixUniqueIds_old::previsit( DeclarationWithType * decl ) {
435// decl->fixUniqueId();
436//}
437
438
439} // namespace
440
441void validateType( Type *type, const Indexer *indexer ) {
442 PassVisitor<EnumAndPointerDecay_old> epc;
443 PassVisitor<LinkReferenceToTypes_old> lrt( indexer );
444 PassVisitor<TraitExpander_old> te;
445 PassVisitor<AssertionFixer_old> af;
446 PassVisitor<CheckOperatorTypes_old> cot;
447 PassVisitor<FixUniqueIds_old> fui;
448 type->accept( epc );
449 type->accept( lrt );
450 type->accept( te );
451 type->accept( af );
452 type->accept( cot );
453 type->accept( fui );
454}
455
456void decayEnumsAndPointers( std::list< Declaration * > & translationUnit ) {
457 PassVisitor<EnumAndPointerDecay_old> epc;
458 acceptAll( translationUnit, epc );
459}
460
461void linkReferenceToTypes( std::list< Declaration * > & translationUnit ) {
462 PassVisitor<LinkReferenceToTypes_old> lrt( nullptr );
463 acceptAll( translationUnit, lrt ); // must happen before autogen, because sized flag needs to propagate to generated functions
464}
465
466void decayForallPointers( std::list< Declaration * > & translationUnit ) {
467 PassVisitor<TraitExpander_old> te;
468 acceptAll( translationUnit, te );
469 PassVisitor<AssertionFixer_old> af;
470 acceptAll( translationUnit, af );
471 PassVisitor<CheckOperatorTypes_old> cot;
472 acceptAll( translationUnit, cot );
473 PassVisitor<FixUniqueIds_old> fui;
474 acceptAll( translationUnit, fui );
475}
476
477
478} // namespace SymTab
479
480// Local Variables: //
481// tab-width: 4 //
482// mode: c++ //
483// compile-command: "make install" //
484// End: //
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