source: src/SymTab/Validate.cc@ cc3528f

ADT aaron-thesis arm-eh ast-experimental cleanup-dtors ctor deferred_resn demangler enum forall-pointer-decay gc_noraii 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 cc3528f was fac84be, checked in by Rob Schluntz <rschlunt@…>, 9 years ago

autogenerated assignment should not assign an unnamed member
  • Property mode set to 100644
File size: 45.5 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// Validate.cc --
8//
9// Author : Richard C. Bilson
10// Created On : Sun May 17 21:50:04 2015
11// Last Modified By : Rob Schluntz
12// Last Modified On : Wed May 11 13:13:16 2016
13// Update Count : 251
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 "ResolvExpr/typeops.h"
59
60#define debugPrint( x ) if ( doDebug ) { std::cout << x; }
61
62namespace SymTab {
63 class HoistStruct : public Visitor {
64 public:
65 /// Flattens nested struct types
66 static void hoistStruct( std::list< Declaration * > &translationUnit );
67
68 std::list< Declaration * > &get_declsToAdd() { return declsToAdd; }
69
70 virtual void visit( StructDecl *aggregateDecl );
71 virtual void visit( UnionDecl *aggregateDecl );
72
73 virtual void visit( CompoundStmt *compoundStmt );
74 virtual void visit( SwitchStmt *switchStmt );
75 virtual void visit( ChooseStmt *chooseStmt );
76 // virtual void visit( CaseStmt *caseStmt );
77 private:
78 HoistStruct();
79
80 template< typename AggDecl > void handleAggregate( AggDecl *aggregateDecl );
81
82 std::list< Declaration * > declsToAdd;
83 bool inStruct;
84 };
85
86 /// Replaces enum types by int, and function or array types in function parameter and return lists by appropriate pointers.
87 class Pass1 : public Visitor {
88 typedef Visitor Parent;
89 virtual void visit( EnumDecl *aggregateDecl );
90 virtual void visit( FunctionType *func );
91 };
92
93 /// Associates forward declarations of aggregates with their definitions
94 class Pass2 : public Indexer {
95 typedef Indexer Parent;
96 public:
97 Pass2( bool doDebug, const Indexer *indexer );
98 private:
99 virtual void visit( StructInstType *structInst );
100 virtual void visit( UnionInstType *unionInst );
101 virtual void visit( TraitInstType *contextInst );
102 virtual void visit( StructDecl *structDecl );
103 virtual void visit( UnionDecl *unionDecl );
104 virtual void visit( TypeInstType *typeInst );
105
106 const Indexer *indexer;
107
108 typedef std::map< std::string, std::list< StructInstType * > > ForwardStructsType;
109 typedef std::map< std::string, std::list< UnionInstType * > > ForwardUnionsType;
110 ForwardStructsType forwardStructs;
111 ForwardUnionsType forwardUnions;
112 };
113
114 /// Replaces array and function types in forall lists by appropriate pointer type
115 class Pass3 : public Indexer {
116 typedef Indexer Parent;
117 public:
118 Pass3( const Indexer *indexer );
119 private:
120 virtual void visit( ObjectDecl *object );
121 virtual void visit( FunctionDecl *func );
122
123 const Indexer *indexer;
124 };
125
126 class AutogenerateRoutines : public Visitor {
127 public:
128 /// Generates assignment operators for aggregate types as required
129 static void autogenerateRoutines( std::list< Declaration * > &translationUnit );
130
131 std::list< Declaration * > &get_declsToAdd() { return declsToAdd; }
132
133 virtual void visit( EnumDecl *enumDecl );
134 virtual void visit( StructDecl *structDecl );
135 virtual void visit( UnionDecl *structDecl );
136 virtual void visit( TypeDecl *typeDecl );
137 virtual void visit( TraitDecl *ctxDecl );
138 virtual void visit( FunctionDecl *functionDecl );
139
140 virtual void visit( FunctionType *ftype );
141 virtual void visit( PointerType *ftype );
142
143 virtual void visit( CompoundStmt *compoundStmt );
144 virtual void visit( SwitchStmt *switchStmt );
145 virtual void visit( ChooseStmt *chooseStmt );
146 // virtual void visit( CaseStmt *caseStmt );
147
148 AutogenerateRoutines() : functionNesting( 0 ) {}
149 private:
150 template< typename StmtClass > void visitStatement( StmtClass *stmt );
151
152 std::list< Declaration * > declsToAdd;
153 std::set< std::string > structsDone;
154 unsigned int functionNesting; // current level of nested functions
155 };
156
157 class ReturnChecker : public Visitor {
158 public:
159 /// Checks that return statements return nothing if their return type is void
160 /// and return something if the return type is non-void.
161 static void checkFunctionReturns( std::list< Declaration * > & translationUnit );
162 private:
163 virtual void visit( FunctionDecl * functionDecl );
164
165 virtual void visit( ReturnStmt * returnStmt );
166
167 std::list< DeclarationWithType * > returnVals;
168 };
169
170 class EliminateTypedef : public Mutator {
171 public:
172 EliminateTypedef() : scopeLevel( 0 ) {}
173 /// Replaces typedefs by forward declarations
174 static void eliminateTypedef( std::list< Declaration * > &translationUnit );
175 private:
176 virtual Declaration *mutate( TypedefDecl *typeDecl );
177 virtual TypeDecl *mutate( TypeDecl *typeDecl );
178 virtual DeclarationWithType *mutate( FunctionDecl *funcDecl );
179 virtual DeclarationWithType *mutate( ObjectDecl *objDecl );
180 virtual CompoundStmt *mutate( CompoundStmt *compoundStmt );
181 virtual Type *mutate( TypeInstType *aggregateUseType );
182 virtual Expression *mutate( CastExpr *castExpr );
183
184 virtual Declaration *mutate( StructDecl * structDecl );
185 virtual Declaration *mutate( UnionDecl * unionDecl );
186 virtual Declaration *mutate( EnumDecl * enumDecl );
187 virtual Declaration *mutate( TraitDecl * contextDecl );
188
189 template<typename AggDecl>
190 AggDecl *handleAggregate( AggDecl * aggDecl );
191
192 template<typename AggDecl>
193 void addImplicitTypedef( AggDecl * aggDecl );
194
195 typedef std::map< std::string, std::pair< TypedefDecl *, int > > TypedefMap;
196 TypedefMap typedefNames;
197 int scopeLevel;
198 };
199
200 class CompoundLiteral : public GenPoly::DeclMutator {
201 DeclarationNode::StorageClass storageclass = DeclarationNode::NoStorageClass;
202
203 virtual DeclarationWithType * mutate( ObjectDecl *objectDecl );
204 virtual Expression *mutate( CompoundLiteralExpr *compLitExpr );
205 };
206
207 void validate( std::list< Declaration * > &translationUnit, bool doDebug ) {
208 Pass1 pass1;
209 Pass2 pass2( doDebug, 0 );
210 Pass3 pass3( 0 );
211 CompoundLiteral compoundliteral;
212
213 EliminateTypedef::eliminateTypedef( translationUnit );
214 HoistStruct::hoistStruct( translationUnit );
215 acceptAll( translationUnit, pass1 );
216 acceptAll( translationUnit, pass2 );
217 ReturnChecker::checkFunctionReturns( translationUnit );
218 mutateAll( translationUnit, compoundliteral );
219 AutogenerateRoutines::autogenerateRoutines( translationUnit );
220 acceptAll( translationUnit, pass3 );
221 }
222
223 void validateType( Type *type, const Indexer *indexer ) {
224 Pass1 pass1;
225 Pass2 pass2( false, indexer );
226 Pass3 pass3( indexer );
227 type->accept( pass1 );
228 type->accept( pass2 );
229 type->accept( pass3 );
230 }
231
232 template< typename Visitor >
233 void acceptAndAdd( std::list< Declaration * > &translationUnit, Visitor &visitor, bool addBefore ) {
234 std::list< Declaration * >::iterator i = translationUnit.begin();
235 while ( i != translationUnit.end() ) {
236 (*i)->accept( visitor );
237 std::list< Declaration * >::iterator next = i;
238 next++;
239 if ( ! visitor.get_declsToAdd().empty() ) {
240 translationUnit.splice( addBefore ? i : next, visitor.get_declsToAdd() );
241 } // if
242 i = next;
243 } // while
244 }
245
246 void HoistStruct::hoistStruct( std::list< Declaration * > &translationUnit ) {
247 HoistStruct hoister;
248 acceptAndAdd( translationUnit, hoister, true );
249 }
250
251 HoistStruct::HoistStruct() : inStruct( false ) {
252 }
253
254 void filter( std::list< Declaration * > &declList, bool (*pred)( Declaration * ), bool doDelete ) {
255 std::list< Declaration * >::iterator i = declList.begin();
256 while ( i != declList.end() ) {
257 std::list< Declaration * >::iterator next = i;
258 ++next;
259 if ( pred( *i ) ) {
260 if ( doDelete ) {
261 delete *i;
262 } // if
263 declList.erase( i );
264 } // if
265 i = next;
266 } // while
267 }
268
269 bool isStructOrUnion( Declaration *decl ) {
270 return dynamic_cast< StructDecl * >( decl ) || dynamic_cast< UnionDecl * >( decl );
271 }
272
273 template< typename AggDecl >
274 void HoistStruct::handleAggregate( AggDecl *aggregateDecl ) {
275 if ( inStruct ) {
276 // Add elements in stack order corresponding to nesting structure.
277 declsToAdd.push_front( aggregateDecl );
278 Visitor::visit( aggregateDecl );
279 } else {
280 inStruct = true;
281 Visitor::visit( aggregateDecl );
282 inStruct = false;
283 } // if
284 // Always remove the hoisted aggregate from the inner structure.
285 filter( aggregateDecl->get_members(), isStructOrUnion, false );
286 }
287
288 void HoistStruct::visit( StructDecl *aggregateDecl ) {
289 handleAggregate( aggregateDecl );
290 }
291
292 void HoistStruct::visit( UnionDecl *aggregateDecl ) {
293 handleAggregate( aggregateDecl );
294 }
295
296 void HoistStruct::visit( CompoundStmt *compoundStmt ) {
297 addVisit( compoundStmt, *this );
298 }
299
300 void HoistStruct::visit( SwitchStmt *switchStmt ) {
301 addVisit( switchStmt, *this );
302 }
303
304 void HoistStruct::visit( ChooseStmt *switchStmt ) {
305 addVisit( switchStmt, *this );
306 }
307
308 // void HoistStruct::visit( CaseStmt *caseStmt ) {
309 // addVisit( caseStmt, *this );
310 // }
311
312 void Pass1::visit( EnumDecl *enumDecl ) {
313 // Set the type of each member of the enumeration to be EnumConstant
314
315 for ( std::list< Declaration * >::iterator i = enumDecl->get_members().begin(); i != enumDecl->get_members().end(); ++i ) {
316 ObjectDecl * obj = dynamic_cast< ObjectDecl * >( *i );
317 assert( obj );
318 // obj->set_type( new EnumInstType( Type::Qualifiers( true, false, false, false, false, false ), enumDecl->get_name() ) );
319 BasicType * enumType = new BasicType( Type::Qualifiers(), BasicType::SignedInt );
320 obj->set_type( enumType ) ;
321 } // for
322 Parent::visit( enumDecl );
323 }
324
325 namespace {
326 template< typename DWTIterator >
327 void fixFunctionList( DWTIterator begin, DWTIterator end, FunctionType *func ) {
328 // the only case in which "void" is valid is where it is the only one in the list; then it should be removed
329 // entirely other fix ups are handled by the FixFunction class
330 if ( begin == end ) return;
331 FixFunction fixer;
332 DWTIterator i = begin;
333 *i = (*i )->acceptMutator( fixer );
334 if ( fixer.get_isVoid() ) {
335 DWTIterator j = i;
336 ++i;
337 func->get_parameters().erase( j );
338 if ( i != end ) {
339 throw SemanticError( "invalid type void in function type ", func );
340 } // if
341 } else {
342 ++i;
343 for ( ; i != end; ++i ) {
344 FixFunction fixer;
345 *i = (*i )->acceptMutator( fixer );
346 if ( fixer.get_isVoid() ) {
347 throw SemanticError( "invalid type void in function type ", func );
348 } // if
349 } // for
350 } // if
351 }
352 }
353
354 void Pass1::visit( FunctionType *func ) {
355 // Fix up parameters and return types
356 fixFunctionList( func->get_parameters().begin(), func->get_parameters().end(), func );
357 fixFunctionList( func->get_returnVals().begin(), func->get_returnVals().end(), func );
358 Visitor::visit( func );
359 }
360
361 Pass2::Pass2( bool doDebug, const Indexer *other_indexer ) : Indexer( doDebug ) {
362 if ( other_indexer ) {
363 indexer = other_indexer;
364 } else {
365 indexer = this;
366 } // if
367 }
368
369 void Pass2::visit( StructInstType *structInst ) {
370 Parent::visit( structInst );
371 StructDecl *st = indexer->lookupStruct( structInst->get_name() );
372 // it's not a semantic error if the struct is not found, just an implicit forward declaration
373 if ( st ) {
374 //assert( ! structInst->get_baseStruct() || structInst->get_baseStruct()->get_members().empty() || ! st->get_members().empty() );
375 structInst->set_baseStruct( st );
376 } // if
377 if ( ! st || st->get_members().empty() ) {
378 // use of forward declaration
379 forwardStructs[ structInst->get_name() ].push_back( structInst );
380 } // if
381 }
382
383 void Pass2::visit( UnionInstType *unionInst ) {
384 Parent::visit( unionInst );
385 UnionDecl *un = indexer->lookupUnion( unionInst->get_name() );
386 // it's not a semantic error if the union is not found, just an implicit forward declaration
387 if ( un ) {
388 unionInst->set_baseUnion( un );
389 } // if
390 if ( ! un || un->get_members().empty() ) {
391 // use of forward declaration
392 forwardUnions[ unionInst->get_name() ].push_back( unionInst );
393 } // if
394 }
395
396 void Pass2::visit( TraitInstType *contextInst ) {
397 Parent::visit( contextInst );
398 TraitDecl *ctx = indexer->lookupTrait( contextInst->get_name() );
399 if ( ! ctx ) {
400 throw SemanticError( "use of undeclared context " + contextInst->get_name() );
401 } // if
402 for ( std::list< TypeDecl * >::const_iterator i = ctx->get_parameters().begin(); i != ctx->get_parameters().end(); ++i ) {
403 for ( std::list< DeclarationWithType * >::const_iterator assert = (*i )->get_assertions().begin(); assert != (*i )->get_assertions().end(); ++assert ) {
404 if ( TraitInstType *otherCtx = dynamic_cast< TraitInstType * >(*assert ) ) {
405 cloneAll( otherCtx->get_members(), contextInst->get_members() );
406 } else {
407 contextInst->get_members().push_back( (*assert )->clone() );
408 } // if
409 } // for
410 } // for
411
412 if ( ctx->get_parameters().size() != contextInst->get_parameters().size() ) {
413 throw SemanticError( "incorrect number of context parameters: ", contextInst );
414 } // if
415
416 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() ) );
417 }
418
419 void Pass2::visit( StructDecl *structDecl ) {
420 if ( ! structDecl->get_members().empty() ) {
421 ForwardStructsType::iterator fwds = forwardStructs.find( structDecl->get_name() );
422 if ( fwds != forwardStructs.end() ) {
423 for ( std::list< StructInstType * >::iterator inst = fwds->second.begin(); inst != fwds->second.end(); ++inst ) {
424 (*inst )->set_baseStruct( structDecl );
425 } // for
426 forwardStructs.erase( fwds );
427 } // if
428 } // if
429 Indexer::visit( structDecl );
430 }
431
432 void Pass2::visit( UnionDecl *unionDecl ) {
433 if ( ! unionDecl->get_members().empty() ) {
434 ForwardUnionsType::iterator fwds = forwardUnions.find( unionDecl->get_name() );
435 if ( fwds != forwardUnions.end() ) {
436 for ( std::list< UnionInstType * >::iterator inst = fwds->second.begin(); inst != fwds->second.end(); ++inst ) {
437 (*inst )->set_baseUnion( unionDecl );
438 } // for
439 forwardUnions.erase( fwds );
440 } // if
441 } // if
442 Indexer::visit( unionDecl );
443 }
444
445 void Pass2::visit( TypeInstType *typeInst ) {
446 if ( NamedTypeDecl *namedTypeDecl = lookupType( typeInst->get_name() ) ) {
447 if ( TypeDecl *typeDecl = dynamic_cast< TypeDecl * >( namedTypeDecl ) ) {
448 typeInst->set_isFtype( typeDecl->get_kind() == TypeDecl::Ftype );
449 } // if
450 } // if
451 }
452
453 Pass3::Pass3( const Indexer *other_indexer ) : Indexer( false ) {
454 if ( other_indexer ) {
455 indexer = other_indexer;
456 } else {
457 indexer = this;
458 } // if
459 }
460
461 /// Fix up assertions
462 void forallFixer( Type *func ) {
463 for ( std::list< TypeDecl * >::iterator type = func->get_forall().begin(); type != func->get_forall().end(); ++type ) {
464 std::list< DeclarationWithType * > toBeDone, nextRound;
465 toBeDone.splice( toBeDone.end(), (*type )->get_assertions() );
466 while ( ! toBeDone.empty() ) {
467 for ( std::list< DeclarationWithType * >::iterator assertion = toBeDone.begin(); assertion != toBeDone.end(); ++assertion ) {
468 if ( TraitInstType *ctx = dynamic_cast< TraitInstType * >( (*assertion )->get_type() ) ) {
469 for ( std::list< Declaration * >::const_iterator i = ctx->get_members().begin(); i != ctx->get_members().end(); ++i ) {
470 DeclarationWithType *dwt = dynamic_cast< DeclarationWithType * >( *i );
471 assert( dwt );
472 nextRound.push_back( dwt->clone() );
473 }
474 delete ctx;
475 } else {
476 FixFunction fixer;
477 *assertion = (*assertion )->acceptMutator( fixer );
478 if ( fixer.get_isVoid() ) {
479 throw SemanticError( "invalid type void in assertion of function ", func );
480 }
481 (*type )->get_assertions().push_back( *assertion );
482 } // if
483 } // for
484 toBeDone.clear();
485 toBeDone.splice( toBeDone.end(), nextRound );
486 } // while
487 } // for
488 }
489
490 void Pass3::visit( ObjectDecl *object ) {
491 forallFixer( object->get_type() );
492 if ( PointerType *pointer = dynamic_cast< PointerType * >( object->get_type() ) ) {
493 forallFixer( pointer->get_base() );
494 } // if
495 Parent::visit( object );
496 object->fixUniqueId();
497 }
498
499 void Pass3::visit( FunctionDecl *func ) {
500 forallFixer( func->get_type() );
501 Parent::visit( func );
502 func->fixUniqueId();
503 }
504
505 static const std::list< std::string > noLabels;
506
507 void AutogenerateRoutines::autogenerateRoutines( std::list< Declaration * > &translationUnit ) {
508 AutogenerateRoutines visitor;
509 acceptAndAdd( translationUnit, visitor, false );
510 }
511
512 template< typename OutputIterator >
513 void makeScalarAssignment( ObjectDecl *srcParam, ObjectDecl *dstParam, DeclarationWithType *member, OutputIterator out ) {
514 ObjectDecl *obj = dynamic_cast<ObjectDecl *>( member );
515 // unnamed bit fields are not copied as they cannot be accessed
516 if ( obj != NULL && obj->get_name() == "" && obj->get_bitfieldWidth() != NULL ) return;
517
518 UntypedExpr *assignExpr = new UntypedExpr( new NameExpr( "?=?" ) );
519
520 UntypedExpr *derefExpr = new UntypedExpr( new NameExpr( "*?" ) );
521 derefExpr->get_args().push_back( new VariableExpr( dstParam ) );
522
523 // do something special for unnamed members
524 Expression *dstselect = new AddressExpr( new MemberExpr( member, derefExpr ) );
525 assignExpr->get_args().push_back( dstselect );
526
527 Expression *srcselect = new MemberExpr( member, new VariableExpr( srcParam ) );
528 assignExpr->get_args().push_back( srcselect );
529
530 *out++ = new ExprStmt( noLabels, assignExpr );
531 }
532
533 template< typename OutputIterator >
534 void makeArrayAssignment( ObjectDecl *srcParam, ObjectDecl *dstParam, DeclarationWithType *member, ArrayType *array, OutputIterator out ) {
535 static UniqueName indexName( "_index" );
536
537 // for a flexible array member nothing is done -- user must define own assignment
538 if ( ! array->get_dimension() ) return;
539
540 ObjectDecl *index = new ObjectDecl( indexName.newName(), DeclarationNode::NoStorageClass, LinkageSpec::C, 0, new BasicType( Type::Qualifiers(), BasicType::SignedInt ), 0 );
541 *out++ = new DeclStmt( noLabels, index );
542
543 UntypedExpr *init = new UntypedExpr( new NameExpr( "?=?" ) );
544 init->get_args().push_back( new AddressExpr( new VariableExpr( index ) ) );
545 init->get_args().push_back( new NameExpr( "0" ) );
546 Statement *initStmt = new ExprStmt( noLabels, init );
547 std::list<Statement *> initList;
548 initList.push_back( initStmt );
549
550 UntypedExpr *cond = new UntypedExpr( new NameExpr( "?<?" ) );
551 cond->get_args().push_back( new VariableExpr( index ) );
552 cond->get_args().push_back( array->get_dimension()->clone() );
553
554 UntypedExpr *inc = new UntypedExpr( new NameExpr( "++?" ) );
555 inc->get_args().push_back( new AddressExpr( new VariableExpr( index ) ) );
556
557 UntypedExpr *assignExpr = new UntypedExpr( new NameExpr( "?=?" ) );
558
559 UntypedExpr *derefExpr = new UntypedExpr( new NameExpr( "*?" ) );
560 derefExpr->get_args().push_back( new VariableExpr( dstParam ) );
561
562 Expression *dstselect = new MemberExpr( member, derefExpr );
563 UntypedExpr *dstIndex = new UntypedExpr( new NameExpr( "?+?" ) );
564 dstIndex->get_args().push_back( dstselect );
565 dstIndex->get_args().push_back( new VariableExpr( index ) );
566 assignExpr->get_args().push_back( dstIndex );
567
568 Expression *srcselect = new MemberExpr( member, new VariableExpr( srcParam ) );
569 UntypedExpr *srcIndex = new UntypedExpr( new NameExpr( "?[?]" ) );
570 srcIndex->get_args().push_back( srcselect );
571 srcIndex->get_args().push_back( new VariableExpr( index ) );
572 assignExpr->get_args().push_back( srcIndex );
573
574 *out++ = new ForStmt( noLabels, initList, cond, inc, new ExprStmt( noLabels, assignExpr ) );
575 }
576
577 template< typename OutputIterator >
578 void makeUnionFieldsAssignment( ObjectDecl *srcParam, ObjectDecl *dstParam, UnionInstType *unionType, OutputIterator out ) {
579 UntypedExpr *copy = new UntypedExpr( new NameExpr( "__builtin_memcpy" ) );
580 copy->get_args().push_back( new VariableExpr( dstParam ) );
581 copy->get_args().push_back( new AddressExpr( new VariableExpr( srcParam ) ) );
582 copy->get_args().push_back( new SizeofExpr( unionType ) );
583
584 *out++ = new ExprStmt( noLabels, copy );
585 }
586
587 //E ?=?(E volatile*, int),
588 // ?=?(E _Atomic volatile*, int);
589 void makeEnumAssignment( EnumDecl *enumDecl, EnumInstType *refType, unsigned int functionNesting, std::list< Declaration * > &declsToAdd ) {
590 FunctionType *assignType = new FunctionType( Type::Qualifiers(), false );
591
592 ObjectDecl *returnVal = new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, refType->clone(), 0 );
593 assignType->get_returnVals().push_back( returnVal );
594
595 // need two assignment operators with different types
596 FunctionType * assignType2 = assignType->clone();
597
598 // E ?=?(E volatile *, E)
599 Type *etype = refType->clone();
600 // etype->get_qualifiers() += Type::Qualifiers(false, true, false, false, false, false);
601
602 ObjectDecl *dstParam = new ObjectDecl( "_dst", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), etype ), 0 );
603 assignType->get_parameters().push_back( dstParam );
604
605 ObjectDecl *srcParam = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, etype->clone(), 0 );
606 assignType->get_parameters().push_back( srcParam );
607
608 // E ?=?(E volatile *, int)
609 assignType2->get_parameters().push_back( dstParam->clone() );
610 BasicType * paramType = new BasicType(Type::Qualifiers(), BasicType::SignedInt);
611 ObjectDecl *srcParam2 = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, paramType, 0 );
612 assignType2->get_parameters().push_back( srcParam2 );
613
614 // Routines at global scope marked "static" to prevent multiple definitions is separate translation units
615 // because each unit generates copies of the default routines for each aggregate.
616
617 // since there is no definition, these should not be inline
618 // make these intrinsic so that the code generator does not make use of them
619 FunctionDecl *assignDecl = new FunctionDecl( "?=?", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::Intrinsic, assignType, 0, false, false );
620 assignDecl->fixUniqueId();
621 FunctionDecl *assignDecl2 = new FunctionDecl( "?=?", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::Intrinsic, assignType2, 0, false, false );
622 assignDecl2->fixUniqueId();
623
624 // these should be built in the same way that the prelude
625 // functions are, so build a list containing the prototypes
626 // and allow MakeLibCfa to autogenerate the bodies.
627 std::list< Declaration * > assigns;
628 assigns.push_back( assignDecl );
629 assigns.push_back( assignDecl2 );
630
631 LibCfa::makeLibCfa( assigns );
632
633 // need to remove the prototypes, since this may be nested in a routine
634 for (int start = 0, end = assigns.size()/2; start < end; start++) {
635 delete assigns.front();
636 assigns.pop_front();
637 } // for
638
639 declsToAdd.insert( declsToAdd.begin(), assigns.begin(), assigns.end() );
640 }
641
642 /// Clones a reference type, replacing any parameters it may have with a clone of the provided list
643 template< typename GenericInstType >
644 GenericInstType *cloneWithParams( GenericInstType *refType, const std::list< Expression* >& params ) {
645 GenericInstType *clone = refType->clone();
646 clone->get_parameters().clear();
647 cloneAll( params, clone->get_parameters() );
648 return clone;
649 }
650
651 /// Creates a new type decl that's the same as src, but renamed and with only the ?=? assertion (for complete types only)
652 TypeDecl *cloneAndRename( TypeDecl *src, const std::string &name ) {
653 TypeDecl *dst = new TypeDecl( name, src->get_storageClass(), 0, src->get_kind() );
654
655 if ( src->get_kind() == TypeDecl::Any ) {
656 // just include assignment operator assertion
657 TypeInstType *assignParamType = new TypeInstType( Type::Qualifiers(), name, dst );
658 FunctionType *assignFunctionType = new FunctionType( Type::Qualifiers(), false );
659 assignFunctionType->get_returnVals().push_back(
660 new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, assignParamType->clone(), 0 ) );
661 assignFunctionType->get_parameters().push_back(
662 new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), assignParamType->clone() ), 0 ) );
663 assignFunctionType->get_parameters().push_back(
664 new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, assignParamType, 0 ) );
665 FunctionDecl *assignAssert = new FunctionDecl( "?=?", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, assignFunctionType, 0, false, false );
666 dst->get_assertions().push_back( assignAssert );
667 }
668
669 return dst;
670 }
671
672 Declaration *makeStructAssignment( StructDecl *aggregateDecl, StructInstType *refType, unsigned int functionNesting ) {
673 FunctionType *assignType = new FunctionType( Type::Qualifiers(), false );
674
675 // Make function polymorphic in same parameters as generic struct, if applicable
676 bool isGeneric = false; // NOTE this flag is an incredibly ugly kludge; we should fix the assignment signature instead (ditto for union)
677 std::list< TypeDecl* >& genericParams = aggregateDecl->get_parameters();
678 std::list< Expression* > structParams; // List of matching parameters to put on types
679 TypeSubstitution genericSubs; // Substitutions to make to member types of struct
680 for ( std::list< TypeDecl* >::const_iterator param = genericParams.begin(); param != genericParams.end(); ++param ) {
681 isGeneric = true;
682 TypeDecl *typeParam = cloneAndRename( *param, "_autoassign_" + aggregateDecl->get_name() + "_" + (*param)->get_name() );
683 assignType->get_forall().push_back( typeParam );
684 TypeInstType *newParamType = new TypeInstType( Type::Qualifiers(), typeParam->get_name(), typeParam );
685 genericSubs.add( (*param)->get_name(), newParamType );
686 structParams.push_back( new TypeExpr( newParamType ) );
687 }
688
689 ObjectDecl *returnVal = new ObjectDecl( "_ret", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, cloneWithParams( refType, structParams ), 0 );
690 assignType->get_returnVals().push_back( returnVal );
691
692 ObjectDecl *dstParam = new ObjectDecl( "_dst", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), cloneWithParams( refType, structParams ) ), 0 );
693 assignType->get_parameters().push_back( dstParam );
694
695 ObjectDecl *srcParam = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, cloneWithParams( refType, structParams ), 0 );
696 assignType->get_parameters().push_back( srcParam );
697
698 // Routines at global scope marked "static" to prevent multiple definitions is separate translation units
699 // because each unit generates copies of the default routines for each aggregate.
700 FunctionDecl *assignDecl = new FunctionDecl( "?=?", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, assignType, new CompoundStmt( noLabels ), true, false );
701 assignDecl->fixUniqueId();
702
703 for ( std::list< Declaration * >::const_iterator member = aggregateDecl->get_members().begin(); member != aggregateDecl->get_members().end(); ++member ) {
704 if ( DeclarationWithType *dwt = dynamic_cast< DeclarationWithType * >( *member ) ) {
705 // query the type qualifiers of this field and skip assigning it if it is marked const.
706 // If it is an array type, we need to strip off the array layers to find its qualifiers.
707 Type * type = dwt->get_type();
708 while ( ArrayType * at = dynamic_cast< ArrayType * >( type ) ) {
709 type = at->get_base();
710 }
711
712 if ( type->get_qualifiers().isConst ) {
713 // don't assign const members
714 continue;
715 }
716
717 if ( dwt->get_name() == "" ) {
718 // don't assign to anonymous members
719 // xxx - this is a temporary fix. Anonymous members tie into
720 // our inheritance model. I think the correct way to handle this is to
721 // cast the structure to the type of the member and let the resolver
722 // figure out whether it's valid and have a pass afterwards that fixes
723 // the assignment to use pointer arithmetic with the offset of the
724 // member, much like how generic type members are handled.
725 continue;
726 }
727
728 if ( isGeneric ) {
729 // rewrite member type in terms of the type variables on this operator
730 DeclarationWithType *fixedMember = dwt->clone();
731 genericSubs.apply( fixedMember );
732
733 // assign to both destination and return value
734 if ( ArrayType *array = dynamic_cast< ArrayType * >( fixedMember->get_type() ) ) {
735 makeArrayAssignment( srcParam, dstParam, fixedMember, array, back_inserter( assignDecl->get_statements()->get_kids() ) );
736 makeArrayAssignment( srcParam, returnVal, fixedMember, array, back_inserter( assignDecl->get_statements()->get_kids() ) );
737 } else {
738 makeScalarAssignment( srcParam, dstParam, fixedMember, back_inserter( assignDecl->get_statements()->get_kids() ) );
739 makeScalarAssignment( srcParam, returnVal, fixedMember, back_inserter( assignDecl->get_statements()->get_kids() ) );
740 } // if
741 } else {
742 // assign to destination
743 if ( ArrayType *array = dynamic_cast< ArrayType * >( dwt->get_type() ) ) {
744 makeArrayAssignment( srcParam, dstParam, dwt, array, back_inserter( assignDecl->get_statements()->get_kids() ) );
745 } else {
746 makeScalarAssignment( srcParam, dstParam, dwt, back_inserter( assignDecl->get_statements()->get_kids() ) );
747 } // if
748 } // if
749 } // if
750 } // for
751 if ( ! isGeneric ) assignDecl->get_statements()->get_kids().push_back( new ReturnStmt( noLabels, new VariableExpr( srcParam ) ) );
752
753 return assignDecl;
754 }
755
756 Declaration *makeUnionAssignment( UnionDecl *aggregateDecl, UnionInstType *refType, unsigned int functionNesting ) {
757 FunctionType *assignType = new FunctionType( Type::Qualifiers(), false );
758
759 // Make function polymorphic in same parameters as generic union, if applicable
760 bool isGeneric = false; // NOTE this flag is an incredibly ugly kludge; we should fix the assignment signature instead (ditto for struct)
761 std::list< TypeDecl* >& genericParams = aggregateDecl->get_parameters();
762 std::list< Expression* > unionParams; // List of matching parameters to put on types
763 for ( std::list< TypeDecl* >::const_iterator param = genericParams.begin(); param != genericParams.end(); ++param ) {
764 isGeneric = true;
765 TypeDecl *typeParam = cloneAndRename( *param, "_autoassign_" + aggregateDecl->get_name() + "_" + (*param)->get_name() );
766 assignType->get_forall().push_back( typeParam );
767 unionParams.push_back( new TypeExpr( new TypeInstType( Type::Qualifiers(), typeParam->get_name(), typeParam ) ) );
768 }
769
770 ObjectDecl *returnVal = new ObjectDecl( "_ret", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, cloneWithParams( refType, unionParams ), 0 );
771 assignType->get_returnVals().push_back( returnVal );
772
773 ObjectDecl *dstParam = new ObjectDecl( "_dst", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), cloneWithParams( refType, unionParams ) ), 0 );
774 assignType->get_parameters().push_back( dstParam );
775
776 ObjectDecl *srcParam = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, cloneWithParams( refType, unionParams ), 0 );
777 assignType->get_parameters().push_back( srcParam );
778
779 // Routines at global scope marked "static" to prevent multiple definitions is separate translation units
780 // because each unit generates copies of the default routines for each aggregate.
781 FunctionDecl *assignDecl = new FunctionDecl( "?=?", functionNesting > 0 ? DeclarationNode::NoStorageClass : DeclarationNode::Static, LinkageSpec::AutoGen, assignType, new CompoundStmt( noLabels ), true, false );
782 assignDecl->fixUniqueId();
783
784 makeUnionFieldsAssignment( srcParam, dstParam, cloneWithParams( refType, unionParams ), back_inserter( assignDecl->get_statements()->get_kids() ) );
785 if ( isGeneric ) makeUnionFieldsAssignment( srcParam, returnVal, cloneWithParams( refType, unionParams ), back_inserter( assignDecl->get_statements()->get_kids() ) );
786
787 if ( ! isGeneric ) assignDecl->get_statements()->get_kids().push_back( new ReturnStmt( noLabels, new VariableExpr( srcParam ) ) );
788
789 return assignDecl;
790 }
791
792 void AutogenerateRoutines::visit( EnumDecl *enumDecl ) {
793 if ( ! enumDecl->get_members().empty() ) {
794 EnumInstType *enumInst = new EnumInstType( Type::Qualifiers(), enumDecl->get_name() );
795 // enumInst->set_baseEnum( enumDecl );
796 // declsToAdd.push_back(
797 makeEnumAssignment( enumDecl, enumInst, functionNesting, declsToAdd );
798 }
799 }
800
801 void AutogenerateRoutines::visit( StructDecl *structDecl ) {
802 if ( ! structDecl->get_members().empty() && structsDone.find( structDecl->get_name() ) == structsDone.end() ) {
803 StructInstType structInst( Type::Qualifiers(), structDecl->get_name() );
804 structInst.set_baseStruct( structDecl );
805 declsToAdd.push_back( makeStructAssignment( structDecl, &structInst, functionNesting ) );
806 structsDone.insert( structDecl->get_name() );
807 } // if
808 }
809
810 void AutogenerateRoutines::visit( UnionDecl *unionDecl ) {
811 if ( ! unionDecl->get_members().empty() ) {
812 UnionInstType unionInst( Type::Qualifiers(), unionDecl->get_name() );
813 unionInst.set_baseUnion( unionDecl );
814 declsToAdd.push_back( makeUnionAssignment( unionDecl, &unionInst, functionNesting ) );
815 } // if
816 }
817
818 void AutogenerateRoutines::visit( TypeDecl *typeDecl ) {
819 CompoundStmt *stmts = 0;
820 TypeInstType *typeInst = new TypeInstType( Type::Qualifiers(), typeDecl->get_name(), false );
821 typeInst->set_baseType( typeDecl );
822 ObjectDecl *src = new ObjectDecl( "_src", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, typeInst->clone(), 0 );
823 ObjectDecl *dst = new ObjectDecl( "_dst", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), typeInst->clone() ), 0 );
824 if ( typeDecl->get_base() ) {
825 stmts = new CompoundStmt( std::list< Label >() );
826 UntypedExpr *assign = new UntypedExpr( new NameExpr( "?=?" ) );
827 assign->get_args().push_back( new CastExpr( new VariableExpr( dst ), new PointerType( Type::Qualifiers(), typeDecl->get_base()->clone() ) ) );
828 assign->get_args().push_back( new CastExpr( new VariableExpr( src ), typeDecl->get_base()->clone() ) );
829 stmts->get_kids().push_back( new ReturnStmt( std::list< Label >(), assign ) );
830 } // if
831 FunctionType *type = new FunctionType( Type::Qualifiers(), false );
832 type->get_returnVals().push_back( new ObjectDecl( "", DeclarationNode::NoStorageClass, LinkageSpec::Cforall, 0, typeInst, 0 ) );
833 type->get_parameters().push_back( dst );
834 type->get_parameters().push_back( src );
835 FunctionDecl *func = new FunctionDecl( "?=?", DeclarationNode::NoStorageClass, LinkageSpec::AutoGen, type, stmts, false, false );
836 declsToAdd.push_back( func );
837 }
838
839 void addDecls( std::list< Declaration * > &declsToAdd, std::list< Statement * > &statements, std::list< Statement * >::iterator i ) {
840 for ( std::list< Declaration * >::iterator decl = declsToAdd.begin(); decl != declsToAdd.end(); ++decl ) {
841 statements.insert( i, new DeclStmt( noLabels, *decl ) );
842 } // for
843 declsToAdd.clear();
844 }
845
846 void AutogenerateRoutines::visit( FunctionType *) {
847 // ensure that we don't add assignment ops for types defined as part of the function
848 }
849
850 void AutogenerateRoutines::visit( PointerType *) {
851 // ensure that we don't add assignment ops for types defined as part of the pointer
852 }
853
854 void AutogenerateRoutines::visit( TraitDecl *) {
855 // ensure that we don't add assignment ops for types defined as part of the context
856 }
857
858 template< typename StmtClass >
859 inline void AutogenerateRoutines::visitStatement( StmtClass *stmt ) {
860 std::set< std::string > oldStructs = structsDone;
861 addVisit( stmt, *this );
862 structsDone = oldStructs;
863 }
864
865 void AutogenerateRoutines::visit( FunctionDecl *functionDecl ) {
866 maybeAccept( functionDecl->get_functionType(), *this );
867 acceptAll( functionDecl->get_oldDecls(), *this );
868 functionNesting += 1;
869 maybeAccept( functionDecl->get_statements(), *this );
870 functionNesting -= 1;
871 }
872
873 void AutogenerateRoutines::visit( CompoundStmt *compoundStmt ) {
874 visitStatement( compoundStmt );
875 }
876
877 void AutogenerateRoutines::visit( SwitchStmt *switchStmt ) {
878 visitStatement( switchStmt );
879 }
880
881 void AutogenerateRoutines::visit( ChooseStmt *switchStmt ) {
882 visitStatement( switchStmt );
883 }
884
885 // void AutogenerateRoutines::visit( CaseStmt *caseStmt ) {
886 // visitStatement( caseStmt );
887 // }
888
889 void ReturnChecker::checkFunctionReturns( std::list< Declaration * > & translationUnit ) {
890 ReturnChecker checker;
891 acceptAll( translationUnit, checker );
892 }
893
894 void ReturnChecker::visit( FunctionDecl * functionDecl ) {
895 std::list< DeclarationWithType * > oldReturnVals = returnVals;
896 returnVals = functionDecl->get_functionType()->get_returnVals();
897 Visitor::visit( functionDecl );
898 returnVals = oldReturnVals;
899 }
900
901 void ReturnChecker::visit( ReturnStmt * returnStmt ) {
902 if ( returnStmt->get_expr() == NULL && returnVals.size() != 0 ) {
903 throw SemanticError( "Non-void function returns no values: " , returnStmt );
904 } else if ( returnStmt->get_expr() != NULL && returnVals.size() == 0 ) {
905 throw SemanticError( "void function returns values: " , returnStmt );
906 }
907 }
908
909
910 bool isTypedef( Declaration *decl ) {
911 return dynamic_cast< TypedefDecl * >( decl );
912 }
913
914 void EliminateTypedef::eliminateTypedef( std::list< Declaration * > &translationUnit ) {
915 EliminateTypedef eliminator;
916 mutateAll( translationUnit, eliminator );
917 filter( translationUnit, isTypedef, true );
918 }
919
920 Type *EliminateTypedef::mutate( TypeInstType * typeInst ) {
921 // instances of typedef types will come here. If it is an instance
922 // of a typdef type, link the instance to its actual type.
923 TypedefMap::const_iterator def = typedefNames.find( typeInst->get_name() );
924 if ( def != typedefNames.end() ) {
925 Type *ret = def->second.first->get_base()->clone();
926 ret->get_qualifiers() += typeInst->get_qualifiers();
927 // place instance parameters on the typedef'd type
928 if ( ! typeInst->get_parameters().empty() ) {
929 ReferenceToType *rtt = dynamic_cast<ReferenceToType*>(ret);
930 if ( ! rtt ) {
931 throw SemanticError("cannot apply type parameters to base type of " + typeInst->get_name());
932 }
933 rtt->get_parameters().clear();
934 cloneAll( typeInst->get_parameters(), rtt->get_parameters() );
935 mutateAll( rtt->get_parameters(), *this ); // recursively fix typedefs on parameters
936 } // if
937 delete typeInst;
938 return ret;
939 } // if
940 return typeInst;
941 }
942
943 Declaration *EliminateTypedef::mutate( TypedefDecl * tyDecl ) {
944 Declaration *ret = Mutator::mutate( tyDecl );
945 if ( typedefNames.count( tyDecl->get_name() ) == 1 && typedefNames[ tyDecl->get_name() ].second == scopeLevel ) {
946 // typedef to the same name from the same scope
947 // must be from the same type
948
949 Type * t1 = tyDecl->get_base();
950 Type * t2 = typedefNames[ tyDecl->get_name() ].first->get_base();
951 if ( ! ResolvExpr::typesCompatible( t1, t2, Indexer() ) ) {
952 throw SemanticError( "cannot redefine typedef: " + tyDecl->get_name() );
953 }
954 } else {
955 typedefNames[ tyDecl->get_name() ] = std::make_pair( tyDecl, scopeLevel );
956 } // if
957
958 // When a typedef is a forward declaration:
959 // typedef struct screen SCREEN;
960 // the declaration portion must be retained:
961 // struct screen;
962 // because the expansion of the typedef is:
963 // void rtn( SCREEN *p ) => void rtn( struct screen *p )
964 // hence the type-name "screen" must be defined.
965 // Note, qualifiers on the typedef are superfluous for the forward declaration.
966 if ( StructInstType *aggDecl = dynamic_cast< StructInstType * >( tyDecl->get_base() ) ) {
967 return new StructDecl( aggDecl->get_name() );
968 } else if ( UnionInstType *aggDecl = dynamic_cast< UnionInstType * >( tyDecl->get_base() ) ) {
969 return new UnionDecl( aggDecl->get_name() );
970 } else {
971 return ret;
972 } // if
973 }
974
975 TypeDecl *EliminateTypedef::mutate( TypeDecl * typeDecl ) {
976 TypedefMap::iterator i = typedefNames.find( typeDecl->get_name() );
977 if ( i != typedefNames.end() ) {
978 typedefNames.erase( i ) ;
979 } // if
980 return typeDecl;
981 }
982
983 DeclarationWithType *EliminateTypedef::mutate( FunctionDecl * funcDecl ) {
984 TypedefMap oldNames = typedefNames;
985 DeclarationWithType *ret = Mutator::mutate( funcDecl );
986 typedefNames = oldNames;
987 return ret;
988 }
989
990 DeclarationWithType *EliminateTypedef::mutate( ObjectDecl * objDecl ) {
991 TypedefMap oldNames = typedefNames;
992 DeclarationWithType *ret = Mutator::mutate( objDecl );
993 typedefNames = oldNames;
994 // is the type a function?
995 if ( FunctionType *funtype = dynamic_cast<FunctionType *>( ret->get_type() ) ) {
996 // replace the current object declaration with a function declaration
997 return new FunctionDecl( ret->get_name(), ret->get_storageClass(), ret->get_linkage(), funtype, 0, ret->get_isInline(), ret->get_isNoreturn() );
998 } else if ( objDecl->get_isInline() || objDecl->get_isNoreturn() ) {
999 throw SemanticError( "invalid inline or _Noreturn specification in declaration of ", objDecl );
1000 } // if
1001 return ret;
1002 }
1003
1004 Expression *EliminateTypedef::mutate( CastExpr * castExpr ) {
1005 TypedefMap oldNames = typedefNames;
1006 Expression *ret = Mutator::mutate( castExpr );
1007 typedefNames = oldNames;
1008 return ret;
1009 }
1010
1011 CompoundStmt *EliminateTypedef::mutate( CompoundStmt * compoundStmt ) {
1012 TypedefMap oldNames = typedefNames;
1013 scopeLevel += 1;
1014 CompoundStmt *ret = Mutator::mutate( compoundStmt );
1015 scopeLevel -= 1;
1016 std::list< Statement * >::iterator i = compoundStmt->get_kids().begin();
1017 while ( i != compoundStmt->get_kids().end() ) {
1018 std::list< Statement * >::iterator next = i+1;
1019 if ( DeclStmt *declStmt = dynamic_cast< DeclStmt * >( *i ) ) {
1020 if ( dynamic_cast< TypedefDecl * >( declStmt->get_decl() ) ) {
1021 delete *i;
1022 compoundStmt->get_kids().erase( i );
1023 } // if
1024 } // if
1025 i = next;
1026 } // while
1027 typedefNames = oldNames;
1028 return ret;
1029 }
1030
1031 // there may be typedefs nested within aggregates in order for everything to work properly, these should be removed
1032 // as well
1033 template<typename AggDecl>
1034 AggDecl *EliminateTypedef::handleAggregate( AggDecl * aggDecl ) {
1035 std::list<Declaration *>::iterator it = aggDecl->get_members().begin();
1036 for ( ; it != aggDecl->get_members().end(); ) {
1037 std::list< Declaration * >::iterator next = it+1;
1038 if ( dynamic_cast< TypedefDecl * >( *it ) ) {
1039 delete *it;
1040 aggDecl->get_members().erase( it );
1041 } // if
1042 it = next;
1043 }
1044 return aggDecl;
1045 }
1046
1047 template<typename AggDecl>
1048 void EliminateTypedef::addImplicitTypedef( AggDecl * aggDecl ) {
1049 if ( typedefNames.count( aggDecl->get_name() ) == 0 ) {
1050 Type *type;
1051 if ( StructDecl * newDeclStructDecl = dynamic_cast< StructDecl * >( aggDecl ) ) {
1052 type = new StructInstType( Type::Qualifiers(), newDeclStructDecl->get_name() );
1053 } else if ( UnionDecl * newDeclUnionDecl = dynamic_cast< UnionDecl * >( aggDecl ) ) {
1054 type = new UnionInstType( Type::Qualifiers(), newDeclUnionDecl->get_name() );
1055 } else if ( EnumDecl * newDeclEnumDecl = dynamic_cast< EnumDecl * >( aggDecl ) ) {
1056 type = new EnumInstType( Type::Qualifiers(), newDeclEnumDecl->get_name() );
1057 } // if
1058 TypedefDecl * tyDecl = new TypedefDecl( aggDecl->get_name(), DeclarationNode::NoStorageClass, type );
1059 typedefNames[ aggDecl->get_name() ] = std::make_pair( tyDecl, scopeLevel );
1060 } // if
1061 }
1062 Declaration *EliminateTypedef::mutate( StructDecl * structDecl ) {
1063 addImplicitTypedef( structDecl );
1064 Mutator::mutate( structDecl );
1065 return handleAggregate( structDecl );
1066 }
1067
1068 Declaration *EliminateTypedef::mutate( UnionDecl * unionDecl ) {
1069 addImplicitTypedef( unionDecl );
1070 Mutator::mutate( unionDecl );
1071 return handleAggregate( unionDecl );
1072 }
1073
1074 Declaration *EliminateTypedef::mutate( EnumDecl * enumDecl ) {
1075 addImplicitTypedef( enumDecl );
1076 Mutator::mutate( enumDecl );
1077 return handleAggregate( enumDecl );
1078 }
1079
1080 Declaration *EliminateTypedef::mutate( TraitDecl * contextDecl ) {
1081 Mutator::mutate( contextDecl );
1082 return handleAggregate( contextDecl );
1083 }
1084
1085 DeclarationWithType * CompoundLiteral::mutate( ObjectDecl *objectDecl ) {
1086 storageclass = objectDecl->get_storageClass();
1087 DeclarationWithType * temp = Mutator::mutate( objectDecl );
1088 storageclass = DeclarationNode::NoStorageClass;
1089 return temp;
1090 }
1091
1092 Expression *CompoundLiteral::mutate( CompoundLiteralExpr *compLitExpr ) {
1093 // transform [storage_class] ... (struct S){ 3, ... };
1094 // into [storage_class] struct S temp = { 3, ... };
1095 static UniqueName indexName( "_compLit" );
1096
1097 ObjectDecl *tempvar = new ObjectDecl( indexName.newName(), storageclass, LinkageSpec::C, 0, compLitExpr->get_type(), compLitExpr->get_initializer() );
1098 compLitExpr->set_type( 0 );
1099 compLitExpr->set_initializer( 0 );
1100 delete compLitExpr;
1101 DeclarationWithType * newtempvar = mutate( tempvar );
1102 addDeclaration( newtempvar ); // add modified temporary to current block
1103 return new VariableExpr( newtempvar );
1104 }
1105} // namespace SymTab
1106
1107// Local Variables: //
1108// tab-width: 4 //
1109// mode: c++ //
1110// compile-command: "make install" //
1111// End: //
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