source: src/SymTab/Validate.cc@ 911348cd

ADT aaron-thesis arm-eh ast-experimental cleanup-dtors ctor deferred_resn demangler enum forall-pointer-decay jacob/cs343-translation jenkins-sandbox memory new-ast new-ast-unique-expr new-env no_list persistent-indexer pthread-emulation qualifiedEnum resolv-new with_gc
Last change on this file since 911348cd was 4e06c1e, checked in by Peter A. Buhr <pabuhr@…>, 9 years ago

changes for switch and choose statements
  • Property mode set to 100644
File size: 25.4 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// Validate.cc --
8//
9// Author : Richard C. Bilson
10// Created On : Sun May 17 21:50:04 2015
11// Last Modified By : Peter A. Buhr
12// Last Modified On : Tue Jul 12 17:49:21 2016
13// Update Count : 298
14//
15
16// The "validate" phase of translation is used to take a syntax tree and convert it into a standard form that aims to be
17// as regular in structure as possible. Some assumptions can be made regarding the state of the tree after this pass is
18// complete, including:
19//
20// - No nested structure or union definitions; any in the input are "hoisted" to the level of the containing struct or
21// union.
22//
23// - All enumeration constants have type EnumInstType.
24//
25// - The type "void" never occurs in lists of function parameter or return types; neither do tuple types. A function
26// taking no arguments has no argument types, and tuples are flattened.
27//
28// - No context instances exist; they are all replaced by the set of declarations signified by the context, instantiated
29// by the particular set of type arguments.
30//
31// - Every declaration is assigned a unique id.
32//
33// - No typedef declarations or instances exist; the actual type is substituted for each instance.
34//
35// - Each type, struct, and union definition is followed by an appropriate assignment operator.
36//
37// - Each use of a struct or union is connected to a complete definition of that struct or union, even if that
38// definition occurs later in the input.
39
40#include <list>
41#include <iterator>
42#include "Common/utility.h"
43#include "Common/UniqueName.h"
44#include "Validate.h"
45#include "SynTree/Visitor.h"
46#include "SynTree/Mutator.h"
47#include "SynTree/Type.h"
48#include "SynTree/Expression.h"
49#include "SynTree/Statement.h"
50#include "SynTree/TypeSubstitution.h"
51#include "Indexer.h"
52#include "FixFunction.h"
53// #include "ImplementationType.h"
54#include "GenPoly/DeclMutator.h"
55#include "AddVisit.h"
56#include "MakeLibCfa.h"
57#include "TypeEquality.h"
58#include "Autogen.h"
59#include "ResolvExpr/typeops.h"
60
61#define debugPrint( x ) if ( doDebug ) { std::cout << x; }
62
63namespace SymTab {
64 class HoistStruct : public Visitor {
65 public:
66 /// Flattens nested struct types
67 static void hoistStruct( std::list< Declaration * > &translationUnit );
68
69 std::list< Declaration * > &get_declsToAdd() { return declsToAdd; }
70
71 virtual void visit( StructDecl *aggregateDecl );
72 virtual void visit( UnionDecl *aggregateDecl );
73
74 virtual void visit( CompoundStmt *compoundStmt );
75 virtual void visit( SwitchStmt *switchStmt );
76 private:
77 HoistStruct();
78
79 template< typename AggDecl > void handleAggregate( AggDecl *aggregateDecl );
80
81 std::list< Declaration * > declsToAdd;
82 bool inStruct;
83 };
84
85 /// Replaces enum types by int, and function or array types in function parameter and return lists by appropriate pointers.
86 class Pass1 : public Visitor {
87 typedef Visitor Parent;
88 virtual void visit( EnumDecl *aggregateDecl );
89 virtual void visit( FunctionType *func );
90 };
91
92 /// Associates forward declarations of aggregates with their definitions
93 class Pass2 : public Indexer {
94 typedef Indexer Parent;
95 public:
96 Pass2( bool doDebug, const Indexer *indexer );
97 private:
98 virtual void visit( StructInstType *structInst );
99 virtual void visit( UnionInstType *unionInst );
100 virtual void visit( TraitInstType *contextInst );
101 virtual void visit( StructDecl *structDecl );
102 virtual void visit( UnionDecl *unionDecl );
103 virtual void visit( TypeInstType *typeInst );
104
105 const Indexer *indexer;
106
107 typedef std::map< std::string, std::list< StructInstType * > > ForwardStructsType;
108 typedef std::map< std::string, std::list< UnionInstType * > > ForwardUnionsType;
109 ForwardStructsType forwardStructs;
110 ForwardUnionsType forwardUnions;
111 };
112
113 /// Replaces array and function types in forall lists by appropriate pointer type
114 class Pass3 : public Indexer {
115 typedef Indexer Parent;
116 public:
117 Pass3( const Indexer *indexer );
118 private:
119 virtual void visit( ObjectDecl *object );
120 virtual void visit( FunctionDecl *func );
121
122 const Indexer *indexer;
123 };
124
125 class ReturnChecker : public Visitor {
126 public:
127 /// Checks that return statements return nothing if their return type is void
128 /// and return something if the return type is non-void.
129 static void checkFunctionReturns( std::list< Declaration * > & translationUnit );
130 private:
131 virtual void visit( FunctionDecl * functionDecl );
132
133 virtual void visit( ReturnStmt * returnStmt );
134
135 std::list< DeclarationWithType * > returnVals;
136 };
137
138 class EliminateTypedef : public Mutator {
139 public:
140 EliminateTypedef() : scopeLevel( 0 ) {}
141 /// Replaces typedefs by forward declarations
142 static void eliminateTypedef( std::list< Declaration * > &translationUnit );
143 private:
144 virtual Declaration *mutate( TypedefDecl *typeDecl );
145 virtual TypeDecl *mutate( TypeDecl *typeDecl );
146 virtual DeclarationWithType *mutate( FunctionDecl *funcDecl );
147 virtual DeclarationWithType *mutate( ObjectDecl *objDecl );
148 virtual CompoundStmt *mutate( CompoundStmt *compoundStmt );
149 virtual Type *mutate( TypeInstType *aggregateUseType );
150 virtual Expression *mutate( CastExpr *castExpr );
151
152 virtual Declaration *mutate( StructDecl * structDecl );
153 virtual Declaration *mutate( UnionDecl * unionDecl );
154 virtual Declaration *mutate( EnumDecl * enumDecl );
155 virtual Declaration *mutate( TraitDecl * contextDecl );
156
157 template<typename AggDecl>
158 AggDecl *handleAggregate( AggDecl * aggDecl );
159
160 template<typename AggDecl>
161 void addImplicitTypedef( AggDecl * aggDecl );
162
163 typedef std::map< std::string, std::pair< TypedefDecl *, int > > TypedefMap;
164 TypedefMap typedefNames;
165 int scopeLevel;
166 };
167
168 class VerifyCtorDtor : public Visitor {
169 public:
170 /// ensure that constructors and destructors have at least one
171 /// parameter, the first of which must be a pointer, and no
172 /// return values.
173 static void verify( std::list< Declaration * > &translationUnit );
174
175 virtual void visit( FunctionDecl *funcDecl );
176};
177
178 class CompoundLiteral : public GenPoly::DeclMutator {
179 DeclarationNode::StorageClass storageclass = DeclarationNode::NoStorageClass;
180
181 virtual DeclarationWithType * mutate( ObjectDecl *objectDecl );
182 virtual Expression *mutate( CompoundLiteralExpr *compLitExpr );
183 };
184
185 void validate( std::list< Declaration * > &translationUnit, bool doDebug ) {
186 Pass1 pass1;
187 Pass2 pass2( doDebug, 0 );
188 Pass3 pass3( 0 );
189 CompoundLiteral compoundliteral;
190
191 EliminateTypedef::eliminateTypedef( translationUnit );
192 HoistStruct::hoistStruct( translationUnit );
193 acceptAll( translationUnit, pass1 );
194 acceptAll( translationUnit, pass2 );
195 ReturnChecker::checkFunctionReturns( translationUnit );
196 mutateAll( translationUnit, compoundliteral );
197 autogenerateRoutines( translationUnit );
198 acceptAll( translationUnit, pass3 );
199 VerifyCtorDtor::verify( translationUnit );
200 }
201
202 void validateType( Type *type, const Indexer *indexer ) {
203 Pass1 pass1;
204 Pass2 pass2( false, indexer );
205 Pass3 pass3( indexer );
206 type->accept( pass1 );
207 type->accept( pass2 );
208 type->accept( pass3 );
209 }
210
211 void HoistStruct::hoistStruct( std::list< Declaration * > &translationUnit ) {
212 HoistStruct hoister;
213 acceptAndAdd( translationUnit, hoister, true );
214 }
215
216 HoistStruct::HoistStruct() : inStruct( false ) {
217 }
218
219 void filter( std::list< Declaration * > &declList, bool (*pred)( Declaration * ), bool doDelete ) {
220 std::list< Declaration * >::iterator i = declList.begin();
221 while ( i != declList.end() ) {
222 std::list< Declaration * >::iterator next = i;
223 ++next;
224 if ( pred( *i ) ) {
225 if ( doDelete ) {
226 delete *i;
227 } // if
228 declList.erase( i );
229 } // if
230 i = next;
231 } // while
232 }
233
234 bool isStructOrUnion( Declaration *decl ) {
235 return dynamic_cast< StructDecl * >( decl ) || dynamic_cast< UnionDecl * >( decl );
236 }
237
238 template< typename AggDecl >
239 void HoistStruct::handleAggregate( AggDecl *aggregateDecl ) {
240 if ( inStruct ) {
241 // Add elements in stack order corresponding to nesting structure.
242 declsToAdd.push_front( aggregateDecl );
243 Visitor::visit( aggregateDecl );
244 } else {
245 inStruct = true;
246 Visitor::visit( aggregateDecl );
247 inStruct = false;
248 } // if
249 // Always remove the hoisted aggregate from the inner structure.
250 filter( aggregateDecl->get_members(), isStructOrUnion, false );
251 }
252
253 void HoistStruct::visit( StructDecl *aggregateDecl ) {
254 handleAggregate( aggregateDecl );
255 }
256
257 void HoistStruct::visit( UnionDecl *aggregateDecl ) {
258 handleAggregate( aggregateDecl );
259 }
260
261 void HoistStruct::visit( CompoundStmt *compoundStmt ) {
262 addVisit( compoundStmt, *this );
263 }
264
265 void HoistStruct::visit( SwitchStmt *switchStmt ) {
266 addVisit( switchStmt, *this );
267 }
268
269 void Pass1::visit( EnumDecl *enumDecl ) {
270 // Set the type of each member of the enumeration to be EnumConstant
271 for ( std::list< Declaration * >::iterator i = enumDecl->get_members().begin(); i != enumDecl->get_members().end(); ++i ) {
272 ObjectDecl * obj = dynamic_cast< ObjectDecl * >( *i );
273 assert( obj );
274 obj->set_type( new EnumInstType( Type::Qualifiers( true, false, false, false, false, false ), enumDecl->get_name() ) );
275 } // for
276 Parent::visit( enumDecl );
277 }
278
279 namespace {
280 template< typename DWTList >
281 void fixFunctionList( DWTList & dwts, FunctionType * func ) {
282 // the only case in which "void" is valid is where it is the only one in the list; then it should be removed
283 // entirely other fix ups are handled by the FixFunction class
284 typedef typename DWTList::iterator DWTIterator;
285 DWTIterator begin( dwts.begin() ), end( dwts.end() );
286 if ( begin == end ) return;
287 FixFunction fixer;
288 DWTIterator i = begin;
289 *i = (*i)->acceptMutator( fixer );
290 if ( fixer.get_isVoid() ) {
291 DWTIterator j = i;
292 ++i;
293 dwts.erase( j );
294 if ( i != end ) {
295 throw SemanticError( "invalid type void in function type ", func );
296 } // if
297 } else {
298 ++i;
299 for ( ; i != end; ++i ) {
300 FixFunction fixer;
301 *i = (*i )->acceptMutator( fixer );
302 if ( fixer.get_isVoid() ) {
303 throw SemanticError( "invalid type void in function type ", func );
304 } // if
305 } // for
306 } // if
307 }
308 }
309
310 void Pass1::visit( FunctionType *func ) {
311 // Fix up parameters and return types
312 fixFunctionList( func->get_parameters(), func );
313 fixFunctionList( func->get_returnVals(), func );
314 Visitor::visit( func );
315 }
316
317 Pass2::Pass2( bool doDebug, const Indexer *other_indexer ) : Indexer( doDebug ) {
318 if ( other_indexer ) {
319 indexer = other_indexer;
320 } else {
321 indexer = this;
322 } // if
323 }
324
325 void Pass2::visit( StructInstType *structInst ) {
326 Parent::visit( structInst );
327 StructDecl *st = indexer->lookupStruct( structInst->get_name() );
328 // it's not a semantic error if the struct is not found, just an implicit forward declaration
329 if ( st ) {
330 //assert( ! structInst->get_baseStruct() || structInst->get_baseStruct()->get_members().empty() || ! st->get_members().empty() );
331 structInst->set_baseStruct( st );
332 } // if
333 if ( ! st || st->get_members().empty() ) {
334 // use of forward declaration
335 forwardStructs[ structInst->get_name() ].push_back( structInst );
336 } // if
337 }
338
339 void Pass2::visit( UnionInstType *unionInst ) {
340 Parent::visit( unionInst );
341 UnionDecl *un = indexer->lookupUnion( unionInst->get_name() );
342 // it's not a semantic error if the union is not found, just an implicit forward declaration
343 if ( un ) {
344 unionInst->set_baseUnion( un );
345 } // if
346 if ( ! un || un->get_members().empty() ) {
347 // use of forward declaration
348 forwardUnions[ unionInst->get_name() ].push_back( unionInst );
349 } // if
350 }
351
352 void Pass2::visit( TraitInstType *contextInst ) {
353 Parent::visit( contextInst );
354 TraitDecl *ctx = indexer->lookupTrait( contextInst->get_name() );
355 if ( ! ctx ) {
356 throw SemanticError( "use of undeclared context " + contextInst->get_name() );
357 } // if
358 for ( std::list< TypeDecl * >::const_iterator i = ctx->get_parameters().begin(); i != ctx->get_parameters().end(); ++i ) {
359 for ( std::list< DeclarationWithType * >::const_iterator assert = (*i )->get_assertions().begin(); assert != (*i )->get_assertions().end(); ++assert ) {
360 if ( TraitInstType *otherCtx = dynamic_cast< TraitInstType * >(*assert ) ) {
361 cloneAll( otherCtx->get_members(), contextInst->get_members() );
362 } else {
363 contextInst->get_members().push_back( (*assert )->clone() );
364 } // if
365 } // for
366 } // for
367
368 if ( ctx->get_parameters().size() != contextInst->get_parameters().size() ) {
369 throw SemanticError( "incorrect number of context parameters: ", contextInst );
370 } // if
371
372 applySubstitution( ctx->get_parameters().begin(), ctx->get_parameters().end(), contextInst->get_parameters().begin(), ctx->get_members().begin(), ctx->get_members().end(), back_inserter( contextInst->get_members() ) );
373 }
374
375 void Pass2::visit( StructDecl *structDecl ) {
376 // visit struct members first so that the types of self-referencing members are updated properly
377 Parent::visit( structDecl );
378 if ( ! structDecl->get_members().empty() ) {
379 ForwardStructsType::iterator fwds = forwardStructs.find( structDecl->get_name() );
380 if ( fwds != forwardStructs.end() ) {
381 for ( std::list< StructInstType * >::iterator inst = fwds->second.begin(); inst != fwds->second.end(); ++inst ) {
382 (*inst )->set_baseStruct( structDecl );
383 } // for
384 forwardStructs.erase( fwds );
385 } // if
386 } // if
387 }
388
389 void Pass2::visit( UnionDecl *unionDecl ) {
390 Parent::visit( unionDecl );
391 if ( ! unionDecl->get_members().empty() ) {
392 ForwardUnionsType::iterator fwds = forwardUnions.find( unionDecl->get_name() );
393 if ( fwds != forwardUnions.end() ) {
394 for ( std::list< UnionInstType * >::iterator inst = fwds->second.begin(); inst != fwds->second.end(); ++inst ) {
395 (*inst )->set_baseUnion( unionDecl );
396 } // for
397 forwardUnions.erase( fwds );
398 } // if
399 } // if
400 }
401
402 void Pass2::visit( TypeInstType *typeInst ) {
403 if ( NamedTypeDecl *namedTypeDecl = lookupType( typeInst->get_name() ) ) {
404 if ( TypeDecl *typeDecl = dynamic_cast< TypeDecl * >( namedTypeDecl ) ) {
405 typeInst->set_isFtype( typeDecl->get_kind() == TypeDecl::Ftype );
406 } // if
407 } // if
408 }
409
410 Pass3::Pass3( const Indexer *other_indexer ) : Indexer( false ) {
411 if ( other_indexer ) {
412 indexer = other_indexer;
413 } else {
414 indexer = this;
415 } // if
416 }
417
418 /// Fix up assertions
419 void forallFixer( Type *func ) {
420 for ( std::list< TypeDecl * >::iterator type = func->get_forall().begin(); type != func->get_forall().end(); ++type ) {
421 std::list< DeclarationWithType * > toBeDone, nextRound;
422 toBeDone.splice( toBeDone.end(), (*type )->get_assertions() );
423 while ( ! toBeDone.empty() ) {
424 for ( std::list< DeclarationWithType * >::iterator assertion = toBeDone.begin(); assertion != toBeDone.end(); ++assertion ) {
425 if ( TraitInstType *ctx = dynamic_cast< TraitInstType * >( (*assertion )->get_type() ) ) {
426 for ( std::list< Declaration * >::const_iterator i = ctx->get_members().begin(); i != ctx->get_members().end(); ++i ) {
427 DeclarationWithType *dwt = dynamic_cast< DeclarationWithType * >( *i );
428 assert( dwt );
429 nextRound.push_back( dwt->clone() );
430 }
431 delete ctx;
432 } else {
433 FixFunction fixer;
434 *assertion = (*assertion )->acceptMutator( fixer );
435 if ( fixer.get_isVoid() ) {
436 throw SemanticError( "invalid type void in assertion of function ", func );
437 }
438 (*type )->get_assertions().push_back( *assertion );
439 } // if
440 } // for
441 toBeDone.clear();
442 toBeDone.splice( toBeDone.end(), nextRound );
443 } // while
444 } // for
445 }
446
447 void Pass3::visit( ObjectDecl *object ) {
448 forallFixer( object->get_type() );
449 if ( PointerType *pointer = dynamic_cast< PointerType * >( object->get_type() ) ) {
450 forallFixer( pointer->get_base() );
451 } // if
452 Parent::visit( object );
453 object->fixUniqueId();
454 }
455
456 void Pass3::visit( FunctionDecl *func ) {
457 forallFixer( func->get_type() );
458 Parent::visit( func );
459 func->fixUniqueId();
460 }
461
462 void ReturnChecker::checkFunctionReturns( std::list< Declaration * > & translationUnit ) {
463 ReturnChecker checker;
464 acceptAll( translationUnit, checker );
465 }
466
467 void ReturnChecker::visit( FunctionDecl * functionDecl ) {
468 std::list< DeclarationWithType * > oldReturnVals = returnVals;
469 returnVals = functionDecl->get_functionType()->get_returnVals();
470 Visitor::visit( functionDecl );
471 returnVals = oldReturnVals;
472 }
473
474 void ReturnChecker::visit( ReturnStmt * returnStmt ) {
475 // Previously this also checked for the existence of an expr paired with no return values on
476 // the function return type. This is incorrect, since you can have an expression attached to
477 // a return statement in a void-returning function in C. The expression is treated as if it
478 // were cast to void.
479 if ( returnStmt->get_expr() == NULL && returnVals.size() != 0 ) {
480 throw SemanticError( "Non-void function returns no values: " , returnStmt );
481 }
482 }
483
484
485 bool isTypedef( Declaration *decl ) {
486 return dynamic_cast< TypedefDecl * >( decl );
487 }
488
489 void EliminateTypedef::eliminateTypedef( std::list< Declaration * > &translationUnit ) {
490 EliminateTypedef eliminator;
491 mutateAll( translationUnit, eliminator );
492 filter( translationUnit, isTypedef, true );
493 }
494
495 Type *EliminateTypedef::mutate( TypeInstType * typeInst ) {
496 // instances of typedef types will come here. If it is an instance
497 // of a typdef type, link the instance to its actual type.
498 TypedefMap::const_iterator def = typedefNames.find( typeInst->get_name() );
499 if ( def != typedefNames.end() ) {
500 Type *ret = def->second.first->get_base()->clone();
501 ret->get_qualifiers() += typeInst->get_qualifiers();
502 // place instance parameters on the typedef'd type
503 if ( ! typeInst->get_parameters().empty() ) {
504 ReferenceToType *rtt = dynamic_cast<ReferenceToType*>(ret);
505 if ( ! rtt ) {
506 throw SemanticError("cannot apply type parameters to base type of " + typeInst->get_name());
507 }
508 rtt->get_parameters().clear();
509 cloneAll( typeInst->get_parameters(), rtt->get_parameters() );
510 mutateAll( rtt->get_parameters(), *this ); // recursively fix typedefs on parameters
511 } // if
512 delete typeInst;
513 return ret;
514 } // if
515 return typeInst;
516 }
517
518 Declaration *EliminateTypedef::mutate( TypedefDecl * tyDecl ) {
519 Declaration *ret = Mutator::mutate( tyDecl );
520 if ( typedefNames.count( tyDecl->get_name() ) == 1 && typedefNames[ tyDecl->get_name() ].second == scopeLevel ) {
521 // typedef to the same name from the same scope
522 // must be from the same type
523
524 Type * t1 = tyDecl->get_base();
525 Type * t2 = typedefNames[ tyDecl->get_name() ].first->get_base();
526 if ( ! ResolvExpr::typesCompatible( t1, t2, Indexer() ) ) {
527 throw SemanticError( "cannot redefine typedef: " + tyDecl->get_name() );
528 }
529 } else {
530 typedefNames[ tyDecl->get_name() ] = std::make_pair( tyDecl, scopeLevel );
531 } // if
532
533 // When a typedef is a forward declaration:
534 // typedef struct screen SCREEN;
535 // the declaration portion must be retained:
536 // struct screen;
537 // because the expansion of the typedef is:
538 // void rtn( SCREEN *p ) => void rtn( struct screen *p )
539 // hence the type-name "screen" must be defined.
540 // Note, qualifiers on the typedef are superfluous for the forward declaration.
541 if ( StructInstType *aggDecl = dynamic_cast< StructInstType * >( tyDecl->get_base() ) ) {
542 return new StructDecl( aggDecl->get_name() );
543// return aggDecl->get_baseStruct();
544 } else if ( UnionInstType *aggDecl = dynamic_cast< UnionInstType * >( tyDecl->get_base() ) ) {
545 return new UnionDecl( aggDecl->get_name() );
546 } else {
547 return ret;
548 } // if
549 }
550
551 TypeDecl *EliminateTypedef::mutate( TypeDecl * typeDecl ) {
552 TypedefMap::iterator i = typedefNames.find( typeDecl->get_name() );
553 if ( i != typedefNames.end() ) {
554 typedefNames.erase( i ) ;
555 } // if
556 return typeDecl;
557 }
558
559 DeclarationWithType *EliminateTypedef::mutate( FunctionDecl * funcDecl ) {
560 TypedefMap oldNames = typedefNames;
561 DeclarationWithType *ret = Mutator::mutate( funcDecl );
562 typedefNames = oldNames;
563 return ret;
564 }
565
566 DeclarationWithType *EliminateTypedef::mutate( ObjectDecl * objDecl ) {
567 TypedefMap oldNames = typedefNames;
568 DeclarationWithType *ret = Mutator::mutate( objDecl );
569 typedefNames = oldNames;
570 // is the type a function?
571 if ( FunctionType *funtype = dynamic_cast<FunctionType *>( ret->get_type() ) ) {
572 // replace the current object declaration with a function declaration
573 return new FunctionDecl( ret->get_name(), ret->get_storageClass(), ret->get_linkage(), funtype, 0, ret->get_isInline(), ret->get_isNoreturn() );
574 } else if ( objDecl->get_isInline() || objDecl->get_isNoreturn() ) {
575 throw SemanticError( "invalid inline or _Noreturn specification in declaration of ", objDecl );
576 } // if
577 return ret;
578 }
579
580 Expression *EliminateTypedef::mutate( CastExpr * castExpr ) {
581 TypedefMap oldNames = typedefNames;
582 Expression *ret = Mutator::mutate( castExpr );
583 typedefNames = oldNames;
584 return ret;
585 }
586
587 CompoundStmt *EliminateTypedef::mutate( CompoundStmt * compoundStmt ) {
588 TypedefMap oldNames = typedefNames;
589 scopeLevel += 1;
590 CompoundStmt *ret = Mutator::mutate( compoundStmt );
591 scopeLevel -= 1;
592 std::list< Statement * >::iterator i = compoundStmt->get_kids().begin();
593 while ( i != compoundStmt->get_kids().end() ) {
594 std::list< Statement * >::iterator next = i+1;
595 if ( DeclStmt *declStmt = dynamic_cast< DeclStmt * >( *i ) ) {
596 if ( dynamic_cast< TypedefDecl * >( declStmt->get_decl() ) ) {
597 delete *i;
598 compoundStmt->get_kids().erase( i );
599 } // if
600 } // if
601 i = next;
602 } // while
603 typedefNames = oldNames;
604 return ret;
605 }
606
607 // there may be typedefs nested within aggregates in order for everything to work properly, these should be removed
608 // as well
609 template<typename AggDecl>
610 AggDecl *EliminateTypedef::handleAggregate( AggDecl * aggDecl ) {
611 std::list<Declaration *>::iterator it = aggDecl->get_members().begin();
612 for ( ; it != aggDecl->get_members().end(); ) {
613 std::list< Declaration * >::iterator next = it+1;
614 if ( dynamic_cast< TypedefDecl * >( *it ) ) {
615 delete *it;
616 aggDecl->get_members().erase( it );
617 } // if
618 it = next;
619 }
620 return aggDecl;
621 }
622
623 template<typename AggDecl>
624 void EliminateTypedef::addImplicitTypedef( AggDecl * aggDecl ) {
625 if ( typedefNames.count( aggDecl->get_name() ) == 0 ) {
626 Type *type;
627 if ( StructDecl * newDeclStructDecl = dynamic_cast< StructDecl * >( aggDecl ) ) {
628 type = new StructInstType( Type::Qualifiers(), newDeclStructDecl->get_name() );
629 } else if ( UnionDecl * newDeclUnionDecl = dynamic_cast< UnionDecl * >( aggDecl ) ) {
630 type = new UnionInstType( Type::Qualifiers(), newDeclUnionDecl->get_name() );
631 } else if ( EnumDecl * newDeclEnumDecl = dynamic_cast< EnumDecl * >( aggDecl ) ) {
632 type = new EnumInstType( Type::Qualifiers(), newDeclEnumDecl->get_name() );
633 } // if
634 TypedefDecl * tyDecl = new TypedefDecl( aggDecl->get_name(), DeclarationNode::NoStorageClass, type );
635 typedefNames[ aggDecl->get_name() ] = std::make_pair( tyDecl, scopeLevel );
636 } // if
637 }
638
639 Declaration *EliminateTypedef::mutate( StructDecl * structDecl ) {
640 addImplicitTypedef( structDecl );
641 Mutator::mutate( structDecl );
642 return handleAggregate( structDecl );
643 }
644
645 Declaration *EliminateTypedef::mutate( UnionDecl * unionDecl ) {
646 addImplicitTypedef( unionDecl );
647 Mutator::mutate( unionDecl );
648 return handleAggregate( unionDecl );
649 }
650
651 Declaration *EliminateTypedef::mutate( EnumDecl * enumDecl ) {
652 addImplicitTypedef( enumDecl );
653 Mutator::mutate( enumDecl );
654 return handleAggregate( enumDecl );
655 }
656
657 Declaration *EliminateTypedef::mutate( TraitDecl * contextDecl ) {
658 Mutator::mutate( contextDecl );
659 return handleAggregate( contextDecl );
660 }
661
662 void VerifyCtorDtor::verify( std::list< Declaration * > & translationUnit ) {
663 VerifyCtorDtor verifier;
664 acceptAll( translationUnit, verifier );
665 }
666
667 void VerifyCtorDtor::visit( FunctionDecl * funcDecl ) {
668 FunctionType * funcType = funcDecl->get_functionType();
669 std::list< DeclarationWithType * > &returnVals = funcType->get_returnVals();
670 std::list< DeclarationWithType * > &params = funcType->get_parameters();
671
672 if ( funcDecl->get_name() == "?{}" || funcDecl->get_name() == "^?{}" ) {
673 if ( params.size() == 0 ) {
674 throw SemanticError( "Constructors and destructors require at least one parameter ", funcDecl );
675 }
676 if ( ! dynamic_cast< PointerType * >( params.front()->get_type() ) ) {
677 throw SemanticError( "First parameter of a constructor or destructor must be a pointer ", funcDecl );
678 }
679 if ( returnVals.size() != 0 ) {
680 throw SemanticError( "Constructors and destructors cannot have explicit return values ", funcDecl );
681 }
682 }
683
684 Visitor::visit( funcDecl );
685 }
686
687 DeclarationWithType * CompoundLiteral::mutate( ObjectDecl *objectDecl ) {
688 storageclass = objectDecl->get_storageClass();
689 DeclarationWithType * temp = Mutator::mutate( objectDecl );
690 storageclass = DeclarationNode::NoStorageClass;
691 return temp;
692 }
693
694 Expression *CompoundLiteral::mutate( CompoundLiteralExpr *compLitExpr ) {
695 // transform [storage_class] ... (struct S){ 3, ... };
696 // into [storage_class] struct S temp = { 3, ... };
697 static UniqueName indexName( "_compLit" );
698
699 ObjectDecl *tempvar = new ObjectDecl( indexName.newName(), storageclass, LinkageSpec::C, 0, compLitExpr->get_type(), compLitExpr->get_initializer() );
700 compLitExpr->set_type( 0 );
701 compLitExpr->set_initializer( 0 );
702 delete compLitExpr;
703 DeclarationWithType * newtempvar = mutate( tempvar );
704 addDeclaration( newtempvar ); // add modified temporary to current block
705 return new VariableExpr( newtempvar );
706 }
707} // namespace SymTab
708
709// Local Variables: //
710// tab-width: 4 //
711// mode: c++ //
712// compile-command: "make install" //
713// End: //
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