source: translator/SymTab/Validate.cc@ c8ffe20b

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 string stuck-waitfor-destruct with_gc
Last change on this file since c8ffe20b was c8ffe20b, checked in by Peter A. Buhr <pabuhr@…>, 12 years ago

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1/*
2 The "validate" phase of translation is used to take a syntax tree and convert it into a
3 standard form that aims to be as regular in structure as possible. Some assumptions can be
4 made regarding the state of the tree after this pass is complete, including:
5
6 - No nested structure or union definitions; any in the input are "hoisted" to the level of
7 the containing struct or union.
8
9 - All enumeration constants have type EnumInstType.
10
11 - The type "void" never occurs in lists of function parameter or return types; neither do
12 tuple types. A function taking no arguments has no argument types, and tuples are flattened.
13
14 - No context instances exist; they are all replaced by the set of declarations signified by
15 the context, instantiated by the particular set of type arguments.
16
17 - Every declaration is assigned a unique id.
18
19 - No typedef declarations or instances exist; the actual type is substituted for each instance.
20
21 - Each type, struct, and union definition is followed by an appropriate assignment operator.
22
23 - Each use of a struct or union is connected to a complete definition of that struct or union,
24 even if that definition occurs later in the input.
25*/
26
27#include <list>
28#include <iterator>
29#include "Validate.h"
30#include "SynTree/Visitor.h"
31#include "SynTree/Mutator.h"
32#include "SynTree/Type.h"
33#include "SynTree/Statement.h"
34#include "Indexer.h"
35#include "SynTree/TypeSubstitution.h"
36#include "FixFunction.h"
37#include "ImplementationType.h"
38#include "utility.h"
39#include "UniqueName.h"
40#include "AddVisit.h"
41
42
43#define debugPrint( x ) if ( doDebug ) { std::cout << x; }
44
45namespace SymTab {
46 class HoistStruct : public Visitor {
47 public:
48 static void hoistStruct( std::list< Declaration * > &translationUnit );
49
50 std::list< Declaration * > &get_declsToAdd() { return declsToAdd; }
51
52 virtual void visit( StructDecl *aggregateDecl );
53 virtual void visit( UnionDecl *aggregateDecl );
54
55 virtual void visit( CompoundStmt *compoundStmt );
56 virtual void visit( IfStmt *ifStmt );
57 virtual void visit( WhileStmt *whileStmt );
58 virtual void visit( ForStmt *forStmt );
59 virtual void visit( SwitchStmt *switchStmt );
60 virtual void visit( ChooseStmt *chooseStmt );
61 virtual void visit( CaseStmt *caseStmt );
62 virtual void visit( CatchStmt *catchStmt );
63 private:
64 HoistStruct();
65
66 template< typename AggDecl > void handleAggregate( AggDecl *aggregateDecl );
67
68 std::list< Declaration * > declsToAdd;
69 bool inStruct;
70 };
71
72 class Pass1 : public Visitor {
73 typedef Visitor Parent;
74 virtual void visit( EnumDecl *aggregateDecl );
75 virtual void visit( FunctionType *func );
76 };
77
78 class Pass2 : public Indexer {
79 typedef Indexer Parent;
80 public:
81 Pass2( bool doDebug, const Indexer *indexer );
82 private:
83 virtual void visit( StructInstType *structInst );
84 virtual void visit( UnionInstType *unionInst );
85 virtual void visit( ContextInstType *contextInst );
86 virtual void visit( StructDecl *structDecl );
87 virtual void visit( UnionDecl *unionDecl );
88 virtual void visit( TypeInstType *typeInst );
89
90 const Indexer *indexer;
91
92 typedef std::map< std::string, std::list< StructInstType * > > ForwardStructsType;
93 typedef std::map< std::string, std::list< UnionInstType * > > ForwardUnionsType;
94 ForwardStructsType forwardStructs;
95 ForwardUnionsType forwardUnions;
96 };
97
98 class Pass3 : public Indexer {
99 typedef Indexer Parent;
100 public:
101 Pass3( const Indexer *indexer );
102 private:
103 virtual void visit( ObjectDecl *object );
104 virtual void visit( FunctionDecl *func );
105
106 const Indexer *indexer;
107 };
108
109 class AddStructAssignment : public Visitor {
110 public:
111 static void addStructAssignment( std::list< Declaration * > &translationUnit );
112
113 std::list< Declaration * > &get_declsToAdd() { return declsToAdd; }
114
115 virtual void visit( StructDecl *structDecl );
116 virtual void visit( UnionDecl *structDecl );
117 virtual void visit( TypeDecl *typeDecl );
118 virtual void visit( ContextDecl *ctxDecl );
119
120 virtual void visit( FunctionType *ftype );
121 virtual void visit( PointerType *ftype );
122
123 virtual void visit( CompoundStmt *compoundStmt );
124 virtual void visit( IfStmt *ifStmt );
125 virtual void visit( WhileStmt *whileStmt );
126 virtual void visit( ForStmt *forStmt );
127 virtual void visit( SwitchStmt *switchStmt );
128 virtual void visit( ChooseStmt *chooseStmt );
129 virtual void visit( CaseStmt *caseStmt );
130 virtual void visit( CatchStmt *catchStmt );
131 private:
132 template< typename StmtClass > void visitStatement( StmtClass *stmt );
133
134 std::list< Declaration * > declsToAdd;
135 std::set< std::string > structsDone;
136 };
137
138 class EliminateTypedef : public Mutator {
139 public:
140 static void eliminateTypedef( std::list< Declaration * > &translationUnit );
141 private:
142 virtual Declaration *mutate( TypedefDecl *typeDecl );
143 virtual TypeDecl *mutate( TypeDecl *typeDecl );
144 virtual DeclarationWithType *mutate( FunctionDecl *funcDecl );
145 virtual ObjectDecl *mutate( ObjectDecl *objDecl );
146 virtual CompoundStmt *mutate( CompoundStmt *compoundStmt );
147 virtual Type *mutate( TypeInstType *aggregateUseType );
148 virtual Expression *mutate( CastExpr *castExpr );
149
150 std::map< std::string, TypedefDecl * > typedefNames;
151 };
152
153 void validate( std::list< Declaration * > &translationUnit, bool doDebug, const Indexer *indexer ) {
154 Pass1 pass1;
155 Pass2 pass2( doDebug, indexer );
156 Pass3 pass3( indexer );
157 EliminateTypedef::eliminateTypedef( translationUnit );
158 HoistStruct::hoistStruct( translationUnit );
159 acceptAll( translationUnit, pass1 );
160 acceptAll( translationUnit, pass2 );
161 AddStructAssignment::addStructAssignment( translationUnit );
162 acceptAll( translationUnit, pass3 );
163 }
164
165 void validateType( Type *type, const Indexer *indexer ) {
166 Pass1 pass1;
167 Pass2 pass2( false, indexer );
168 Pass3 pass3( indexer );
169 type->accept( pass1 );
170 type->accept( pass2 );
171 type->accept( pass3 );
172 }
173
174 template< typename Visitor >
175 void acceptAndAdd( std::list< Declaration * > &translationUnit, Visitor &visitor, bool addBefore ) {
176 std::list< Declaration * >::iterator i = translationUnit.begin();
177 while ( i != translationUnit.end() ) {
178 (*i )->accept( visitor );
179 std::list< Declaration * >::iterator next = i;
180 next++;
181 if ( ! visitor.get_declsToAdd().empty() ) {
182 translationUnit.splice( addBefore ? i : next, visitor.get_declsToAdd() );
183 }
184 i = next;
185 }
186 }
187
188 void HoistStruct::hoistStruct( std::list< Declaration * > &translationUnit ) {
189 HoistStruct hoister;
190 acceptAndAdd( translationUnit, hoister, true );
191 }
192
193 HoistStruct::HoistStruct()
194 : inStruct( false ) {
195 }
196
197 void filter( std::list< Declaration * > &declList, bool (*pred )( Declaration * ), bool doDelete ) {
198 std::list< Declaration * >::iterator i = declList.begin();
199 while ( i != declList.end() ) {
200 std::list< Declaration * >::iterator next = i;
201 ++next;
202 if ( pred( *i ) ) {
203 if ( doDelete ) {
204 delete *i;
205 }
206 declList.erase( i );
207 }
208 i = next;
209 }
210 }
211
212 bool
213 isStructOrUnion( Declaration *decl ) {
214 return dynamic_cast< StructDecl * >( decl ) || dynamic_cast< UnionDecl * >( decl );
215 }
216
217 template< typename AggDecl >
218 void HoistStruct::handleAggregate( AggDecl *aggregateDecl ) {
219 if ( inStruct ) {
220 declsToAdd.push_back( aggregateDecl );
221 Visitor::visit( aggregateDecl );
222 } else {
223 inStruct = true;
224 Visitor::visit( aggregateDecl );
225 inStruct = false;
226 filter( aggregateDecl->get_members(), isStructOrUnion, false );
227 }
228 }
229
230 void HoistStruct::visit( StructDecl *aggregateDecl ) {
231 handleAggregate( aggregateDecl );
232 }
233
234 void HoistStruct::visit( UnionDecl *aggregateDecl ) {
235 handleAggregate( aggregateDecl );
236 }
237
238 void HoistStruct::visit( CompoundStmt *compoundStmt ) {
239 addVisit( compoundStmt, *this );
240 }
241
242 void HoistStruct::visit( IfStmt *ifStmt ) {
243 addVisit( ifStmt, *this );
244 }
245
246 void HoistStruct::visit( WhileStmt *whileStmt ) {
247 addVisit( whileStmt, *this );
248 }
249
250 void HoistStruct::visit( ForStmt *forStmt ) {
251 addVisit( forStmt, *this );
252 }
253
254 void HoistStruct::visit( SwitchStmt *switchStmt ) {
255 addVisit( switchStmt, *this );
256 }
257
258 void HoistStruct::visit( ChooseStmt *switchStmt ) {
259 addVisit( switchStmt, *this );
260 }
261
262 void HoistStruct::visit( CaseStmt *caseStmt ) {
263 addVisit( caseStmt, *this );
264 }
265
266 void HoistStruct::visit( CatchStmt *cathStmt ) {
267 addVisit( cathStmt, *this );
268 }
269
270 void Pass1::visit( EnumDecl *enumDecl ) {
271 // Set the type of each member of the enumeration to be EnumConstant
272
273 for( std::list< Declaration * >::iterator i = enumDecl->get_members().begin(); i != enumDecl->get_members().end(); ++i ) {
274 ObjectDecl *obj = dynamic_cast< ObjectDecl * >( *i );
275 assert( obj );
276 obj->set_type( new EnumInstType( Type::Qualifiers( true, false, false, false ), enumDecl->get_name() ) );
277 }
278 Parent::visit( enumDecl );
279 }
280
281 namespace {
282 template< typename DWTIterator >
283 void
284 fixFunctionList( DWTIterator begin, DWTIterator end, FunctionType *func ) {
285 // the only case in which "void" is valid is where it is the only one in the list; then
286 // it should be removed entirely
287 // other fix ups are handled by the FixFunction class
288 if ( begin == end ) return;
289 FixFunction fixer;
290 DWTIterator i = begin;
291 *i = (*i )->acceptMutator( fixer );
292 if ( fixer.get_isVoid() ) {
293 DWTIterator j = i;
294 ++i;
295 func->get_parameters().erase( j );
296 if ( i != end ) {
297 throw SemanticError( "invalid type void in function type ", func );
298 }
299 } else {
300 ++i;
301 for( ; i != end; ++i ) {
302 FixFunction fixer;
303 *i = (*i )->acceptMutator( fixer );
304 if ( fixer.get_isVoid() ) {
305 throw SemanticError( "invalid type void in function type ", func );
306 }
307 }
308 }
309 }
310 }
311
312 void Pass1::visit( FunctionType *func ) {
313 // Fix up parameters and return types
314 fixFunctionList( func->get_parameters().begin(), func->get_parameters().end(), func );
315 fixFunctionList( func->get_returnVals().begin(), func->get_returnVals().end(), func );
316 Visitor::visit( func );
317 }
318
319 Pass2::Pass2( bool doDebug, const Indexer *other_indexer )
320 : Indexer( doDebug ) {
321 if ( other_indexer ) {
322 indexer = other_indexer;
323 } else {
324 indexer = this;
325 }
326 }
327
328 void Pass2::visit( StructInstType *structInst ) {
329 Parent::visit( structInst );
330 StructDecl *st = indexer->lookupStruct( structInst->get_name() );
331 // it's not a semantic error if the struct is not found, just an implicit forward declaration
332 if ( st ) {
333 assert( ! structInst->get_baseStruct() || structInst->get_baseStruct()->get_members().empty() || ! st->get_members().empty() );
334 structInst->set_baseStruct( st );
335 }
336 if ( ! st || st->get_members().empty() ) {
337 // use of forward declaration
338 forwardStructs[ structInst->get_name() ].push_back( structInst );
339 }
340 }
341
342 void Pass2::visit( UnionInstType *unionInst ) {
343 Parent::visit( unionInst );
344 UnionDecl *un = indexer->lookupUnion( unionInst->get_name() );
345 // it's not a semantic error if the union is not found, just an implicit forward declaration
346 if ( un ) {
347 unionInst->set_baseUnion( un );
348 }
349 if ( ! un || un->get_members().empty() ) {
350 // use of forward declaration
351 forwardUnions[ unionInst->get_name() ].push_back( unionInst );
352 }
353 }
354
355 void Pass2::visit( ContextInstType *contextInst ) {
356 Parent::visit( contextInst );
357 ContextDecl *ctx = indexer->lookupContext( contextInst->get_name() );
358 if ( ! ctx ) {
359 throw SemanticError( "use of undeclared context " + contextInst->get_name() );
360 }
361 for( std::list< TypeDecl * >::const_iterator i = ctx->get_parameters().begin(); i != ctx->get_parameters().end(); ++i ) {
362 for( std::list< DeclarationWithType * >::const_iterator assert = (*i )->get_assertions().begin(); assert != (*i )->get_assertions().end(); ++assert ) {
363 if ( ContextInstType *otherCtx = dynamic_cast< ContextInstType * >(*assert ) ) {
364 cloneAll( otherCtx->get_members(), contextInst->get_members() );
365 } else {
366 contextInst->get_members().push_back( (*assert )->clone() );
367 }
368 }
369 }
370 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() ) );
371 }
372
373 void Pass2::visit( StructDecl *structDecl ) {
374 if ( ! structDecl->get_members().empty() ) {
375 ForwardStructsType::iterator fwds = forwardStructs.find( structDecl->get_name() );
376 if ( fwds != forwardStructs.end() ) {
377 for( std::list< StructInstType * >::iterator inst = fwds->second.begin(); inst != fwds->second.end(); ++inst ) {
378 (*inst )->set_baseStruct( structDecl );
379 }
380 forwardStructs.erase( fwds );
381 }
382 }
383 Indexer::visit( structDecl );
384 }
385
386 void Pass2::visit( UnionDecl *unionDecl ) {
387 if ( ! unionDecl->get_members().empty() ) {
388 ForwardUnionsType::iterator fwds = forwardUnions.find( unionDecl->get_name() );
389 if ( fwds != forwardUnions.end() ) {
390 for( std::list< UnionInstType * >::iterator inst = fwds->second.begin(); inst != fwds->second.end(); ++inst ) {
391 (*inst )->set_baseUnion( unionDecl );
392 }
393 forwardUnions.erase( fwds );
394 }
395 }
396 Indexer::visit( unionDecl );
397 }
398
399 void Pass2::visit( TypeInstType *typeInst ) {
400 if ( NamedTypeDecl *namedTypeDecl = lookupType( typeInst->get_name() ) ) {
401 if ( TypeDecl *typeDecl = dynamic_cast< TypeDecl * >( namedTypeDecl ) ) {
402 typeInst->set_isFtype( typeDecl->get_kind() == TypeDecl::Ftype );
403 }
404 }
405 }
406
407 Pass3::Pass3( const Indexer *other_indexer )
408 : Indexer( false ) {
409 if ( other_indexer ) {
410 indexer = other_indexer;
411 } else {
412 indexer = this;
413 }
414 }
415
416 void forallFixer( Type *func ) {
417 // Fix up assertions
418 for( std::list< TypeDecl * >::iterator type = func->get_forall().begin(); type != func->get_forall().end(); ++type ) {
419 std::list< DeclarationWithType * > toBeDone, nextRound;
420 toBeDone.splice( toBeDone.end(), (*type )->get_assertions() );
421 while ( ! toBeDone.empty() ) {
422 for( std::list< DeclarationWithType * >::iterator assertion = toBeDone.begin(); assertion != toBeDone.end(); ++assertion ) {
423 if ( ContextInstType *ctx = dynamic_cast< ContextInstType * >( (*assertion )->get_type() ) ) {
424 for( std::list< Declaration * >::const_iterator i = ctx->get_members().begin(); i != ctx->get_members().end(); ++i ) {
425 DeclarationWithType *dwt = dynamic_cast< DeclarationWithType * >( *i );
426 assert( dwt );
427 nextRound.push_back( dwt->clone() );
428 }
429 delete ctx;
430 } else {
431 FixFunction fixer;
432 *assertion = (*assertion )->acceptMutator( fixer );
433 if ( fixer.get_isVoid() ) {
434 throw SemanticError( "invalid type void in assertion of function ", func );
435 }
436 (*type )->get_assertions().push_back( *assertion );
437 }
438 }
439 toBeDone.clear();
440 toBeDone.splice( toBeDone.end(), nextRound );
441 }
442 }
443 }
444
445 void Pass3::visit( ObjectDecl *object ) {
446 forallFixer( object->get_type() );
447 if ( PointerType *pointer = dynamic_cast< PointerType * >( object->get_type() ) ) {
448 forallFixer( pointer->get_base() );
449 }
450 Parent::visit( object );
451 object->fixUniqueId();
452 }
453
454 void Pass3::visit( FunctionDecl *func ) {
455 forallFixer( func->get_type() );
456 Parent::visit( func );
457 func->fixUniqueId();
458 }
459
460 static const std::list< std::string > noLabels;
461
462 void AddStructAssignment::addStructAssignment( std::list< Declaration * > &translationUnit ) {
463 AddStructAssignment visitor;
464 acceptAndAdd( translationUnit, visitor, false );
465 }
466
467 template< typename OutputIterator >
468 void makeScalarAssignment( ObjectDecl *srcParam, ObjectDecl *dstParam, DeclarationWithType *member, OutputIterator out ) {
469 ObjectDecl *obj = dynamic_cast<ObjectDecl *>( member ); // PAB: unnamed bit fields are not copied
470 if ( obj != NULL && obj->get_name() == "" && obj->get_bitfieldWidth() != NULL ) return;
471
472 UntypedExpr *assignExpr = new UntypedExpr( new NameExpr( "?=?" ) );
473
474 UntypedExpr *derefExpr = new UntypedExpr( new NameExpr( "*?" ) );
475 derefExpr->get_args().push_back( new VariableExpr( dstParam ) );
476
477 // do something special for unnamed members
478 Expression *dstselect = new AddressExpr( new MemberExpr( member, derefExpr ) );
479 assignExpr->get_args().push_back( dstselect );
480
481 Expression *srcselect = new MemberExpr( member, new VariableExpr( srcParam ) );
482 assignExpr->get_args().push_back( srcselect );
483
484 *out++ = new ExprStmt( noLabels, assignExpr );
485 }
486
487 template< typename OutputIterator >
488 void makeArrayAssignment( ObjectDecl *srcParam, ObjectDecl *dstParam, DeclarationWithType *member, ArrayType *array, OutputIterator out ) {
489 static UniqueName indexName( "_index" );
490
491 // for a flexible array member nothing is done -- user must define own assignment
492 if ( ! array->get_dimension() ) return;
493
494 ObjectDecl *index = new ObjectDecl( indexName.newName(), Declaration::NoStorageClass, LinkageSpec::C, 0, new BasicType( Type::Qualifiers(), BasicType::SignedInt ), 0 );
495 *out++ = new DeclStmt( noLabels, index );
496
497 UntypedExpr *init = new UntypedExpr( new NameExpr( "?=?" ) );
498 init->get_args().push_back( new AddressExpr( new VariableExpr( index ) ) );
499 init->get_args().push_back( new NameExpr( "0" ) );
500 Statement *initStmt = new ExprStmt( noLabels, init );
501
502 UntypedExpr *cond = new UntypedExpr( new NameExpr( "?<?" ) );
503 cond->get_args().push_back( new VariableExpr( index ) );
504 cond->get_args().push_back( array->get_dimension()->clone() );
505
506 UntypedExpr *inc = new UntypedExpr( new NameExpr( "++?" ) );
507 inc->get_args().push_back( new AddressExpr( new VariableExpr( index ) ) );
508
509 UntypedExpr *assignExpr = new UntypedExpr( new NameExpr( "?=?" ) );
510
511 UntypedExpr *derefExpr = new UntypedExpr( new NameExpr( "*?" ) );
512 derefExpr->get_args().push_back( new VariableExpr( dstParam ) );
513
514 Expression *dstselect = new MemberExpr( member, derefExpr );
515 UntypedExpr *dstIndex = new UntypedExpr( new NameExpr( "?+?" ) );
516 dstIndex->get_args().push_back( dstselect );
517 dstIndex->get_args().push_back( new VariableExpr( index ) );
518 assignExpr->get_args().push_back( dstIndex );
519
520 Expression *srcselect = new MemberExpr( member, new VariableExpr( srcParam ) );
521 UntypedExpr *srcIndex = new UntypedExpr( new NameExpr( "?[?]" ) );
522 srcIndex->get_args().push_back( srcselect );
523 srcIndex->get_args().push_back( new VariableExpr( index ) );
524 assignExpr->get_args().push_back( srcIndex );
525
526 *out++ = new ForStmt( noLabels, initStmt, cond, inc, new ExprStmt( noLabels, assignExpr ) );
527 }
528
529 Declaration *makeStructAssignment( StructDecl *aggregateDecl, StructInstType *refType ) {
530 FunctionType *assignType = new FunctionType( Type::Qualifiers(), false );
531
532 ObjectDecl *returnVal = new ObjectDecl( "", Declaration::NoStorageClass, LinkageSpec::Cforall, 0, refType->clone(), 0 );
533 assignType->get_returnVals().push_back( returnVal );
534
535 ObjectDecl *dstParam = new ObjectDecl( "_dst", Declaration::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), refType->clone() ), 0 );
536 assignType->get_parameters().push_back( dstParam );
537
538 ObjectDecl *srcParam = new ObjectDecl( "_src", Declaration::NoStorageClass, LinkageSpec::Cforall, 0, refType, 0 );
539 assignType->get_parameters().push_back( srcParam );
540
541 FunctionDecl *assignDecl = new FunctionDecl( "?=?", Declaration::Static, LinkageSpec::AutoGen, assignType, new CompoundStmt( noLabels ), true );
542 assignDecl->fixUniqueId();
543
544 for( std::list< Declaration * >::const_iterator member = aggregateDecl->get_members().begin(); member != aggregateDecl->get_members().end(); ++member ) {
545 if ( DeclarationWithType *dwt = dynamic_cast< DeclarationWithType * >( *member ) ) {
546 if ( ArrayType *array = dynamic_cast< ArrayType * >( dwt->get_type() ) ) {
547 makeArrayAssignment( srcParam, dstParam, dwt, array, back_inserter( assignDecl->get_statements()->get_kids() ) );
548 } else {
549 makeScalarAssignment( srcParam, dstParam, dwt, back_inserter( assignDecl->get_statements()->get_kids() ) );
550 }
551 }
552 }
553 assignDecl->get_statements()->get_kids().push_back( new ReturnStmt( noLabels, new VariableExpr( srcParam ) ) );
554
555 return assignDecl;
556 }
557
558 Declaration *makeUnionAssignment( UnionDecl *aggregateDecl, UnionInstType *refType ) {
559 FunctionType *assignType = new FunctionType( Type::Qualifiers(), false );
560
561 ObjectDecl *returnVal = new ObjectDecl( "", Declaration::NoStorageClass, LinkageSpec::Cforall, 0, refType->clone(), 0 );
562 assignType->get_returnVals().push_back( returnVal );
563
564 ObjectDecl *dstParam = new ObjectDecl( "_dst", Declaration::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), refType->clone() ), 0 );
565 assignType->get_parameters().push_back( dstParam );
566
567 ObjectDecl *srcParam = new ObjectDecl( "_src", Declaration::NoStorageClass, LinkageSpec::Cforall, 0, refType, 0 );
568 assignType->get_parameters().push_back( srcParam );
569
570 FunctionDecl *assignDecl = new FunctionDecl( "?=?", Declaration::Static, LinkageSpec::AutoGen, assignType, new CompoundStmt( noLabels ), true );
571 assignDecl->fixUniqueId();
572
573 UntypedExpr *copy = new UntypedExpr( new NameExpr( "__builtin_memcpy" ) );
574 copy->get_args().push_back( new VariableExpr( dstParam ) );
575 copy->get_args().push_back( new AddressExpr( new VariableExpr( srcParam ) ) );
576 copy->get_args().push_back( new SizeofExpr( refType->clone() ) );
577
578 assignDecl->get_statements()->get_kids().push_back( new ExprStmt( noLabels, copy ) );
579 assignDecl->get_statements()->get_kids().push_back( new ReturnStmt( noLabels, new VariableExpr( srcParam ) ) );
580
581 return assignDecl;
582 }
583
584 void AddStructAssignment::visit( StructDecl *structDecl ) {
585 if ( ! structDecl->get_members().empty() && structsDone.find( structDecl->get_name() ) == structsDone.end() ) {
586 StructInstType *structInst = new StructInstType( Type::Qualifiers(), structDecl->get_name() );
587 structInst->set_baseStruct( structDecl );
588 declsToAdd.push_back( makeStructAssignment( structDecl, structInst ) );
589 structsDone.insert( structDecl->get_name() );
590 }
591 }
592
593 void AddStructAssignment::visit( UnionDecl *unionDecl ) {
594 if ( ! unionDecl->get_members().empty() ) {
595 UnionInstType *unionInst = new UnionInstType( Type::Qualifiers(), unionDecl->get_name() );
596 unionInst->set_baseUnion( unionDecl );
597 declsToAdd.push_back( makeUnionAssignment( unionDecl, unionInst ) );
598 }
599 }
600
601 void AddStructAssignment::visit( TypeDecl *typeDecl ) {
602 CompoundStmt *stmts = 0;
603 TypeInstType *typeInst = new TypeInstType( Type::Qualifiers(), typeDecl->get_name(), false );
604 typeInst->set_baseType( typeDecl );
605 ObjectDecl *src = new ObjectDecl( "_src", Declaration::NoStorageClass, LinkageSpec::Cforall, 0, typeInst->clone(), 0 );
606 ObjectDecl *dst = new ObjectDecl( "_dst", Declaration::NoStorageClass, LinkageSpec::Cforall, 0, new PointerType( Type::Qualifiers(), typeInst->clone() ), 0 );
607 if ( typeDecl->get_base() ) {
608 stmts = new CompoundStmt( std::list< Label >() );
609 UntypedExpr *assign = new UntypedExpr( new NameExpr( "?=?" ) );
610 assign->get_args().push_back( new CastExpr( new VariableExpr( dst ), new PointerType( Type::Qualifiers(), typeDecl->get_base()->clone() ) ) );
611 assign->get_args().push_back( new CastExpr( new VariableExpr( src ), typeDecl->get_base()->clone() ) );
612 stmts->get_kids().push_back( new ReturnStmt( std::list< Label >(), assign ) );
613 }
614 FunctionType *type = new FunctionType( Type::Qualifiers(), false );
615 type->get_returnVals().push_back( new ObjectDecl( "", Declaration::NoStorageClass, LinkageSpec::Cforall, 0, typeInst, 0 ) );
616 type->get_parameters().push_back( dst );
617 type->get_parameters().push_back( src );
618 FunctionDecl *func = new FunctionDecl( "?=?", Declaration::NoStorageClass, LinkageSpec::AutoGen, type, stmts, false );
619 declsToAdd.push_back( func );
620 }
621
622 void addDecls( std::list< Declaration * > &declsToAdd, std::list< Statement * > &statements, std::list< Statement * >::iterator i ) {
623 if ( ! declsToAdd.empty() ) {
624 for( std::list< Declaration * >::iterator decl = declsToAdd.begin(); decl != declsToAdd.end(); ++decl ) {
625 statements.insert( i, new DeclStmt( noLabels, *decl ) );
626 }
627 declsToAdd.clear();
628 }
629 }
630
631 void AddStructAssignment::visit( FunctionType *) {
632 // ensure that we don't add assignment ops for types defined
633 // as part of the function
634 }
635
636 void AddStructAssignment::visit( PointerType *) {
637 // ensure that we don't add assignment ops for types defined
638 // as part of the pointer
639 }
640
641 void AddStructAssignment::visit( ContextDecl *) {
642 // ensure that we don't add assignment ops for types defined
643 // as part of the context
644 }
645
646 template< typename StmtClass >
647 inline void AddStructAssignment::visitStatement( StmtClass *stmt ) {
648 std::set< std::string > oldStructs = structsDone;
649 addVisit( stmt, *this );
650 structsDone = oldStructs;
651 }
652
653 void AddStructAssignment::visit( CompoundStmt *compoundStmt ) {
654 visitStatement( compoundStmt );
655 }
656
657 void AddStructAssignment::visit( IfStmt *ifStmt ) {
658 visitStatement( ifStmt );
659 }
660
661 void AddStructAssignment::visit( WhileStmt *whileStmt ) {
662 visitStatement( whileStmt );
663 }
664
665 void AddStructAssignment::visit( ForStmt *forStmt ) {
666 visitStatement( forStmt );
667 }
668
669 void AddStructAssignment::visit( SwitchStmt *switchStmt ) {
670 visitStatement( switchStmt );
671 }
672
673 void AddStructAssignment::visit( ChooseStmt *switchStmt ) {
674 visitStatement( switchStmt );
675 }
676
677 void AddStructAssignment::visit( CaseStmt *caseStmt ) {
678 visitStatement( caseStmt );
679 }
680
681 void AddStructAssignment::visit( CatchStmt *cathStmt ) {
682 visitStatement( cathStmt );
683 }
684
685 bool isTypedef( Declaration *decl ) {
686 return dynamic_cast< TypedefDecl * >( decl );
687 }
688
689 void EliminateTypedef::eliminateTypedef( std::list< Declaration * > &translationUnit ) {
690 EliminateTypedef eliminator;
691 mutateAll( translationUnit, eliminator );
692 filter( translationUnit, isTypedef, true );
693 }
694
695 Type *EliminateTypedef::mutate( TypeInstType *typeInst ) {
696 std::map< std::string, TypedefDecl * >::const_iterator def = typedefNames.find( typeInst->get_name() );
697 if ( def != typedefNames.end() ) {
698 Type *ret = def->second->get_base()->clone();
699 ret->get_qualifiers() += typeInst->get_qualifiers();
700 delete typeInst;
701 return ret;
702 }
703 return typeInst;
704 }
705
706 Declaration *EliminateTypedef::mutate( TypedefDecl *tyDecl ) {
707 Declaration *ret = Mutator::mutate( tyDecl );
708 typedefNames[ tyDecl->get_name() ] = tyDecl;
709 if ( AggregateDecl *aggDecl = dynamic_cast< AggregateDecl * >( tyDecl->get_base() ) ) {
710 tyDecl->set_base( 0 );
711 delete tyDecl;
712 return aggDecl;
713 } else {
714 return ret;
715 }
716 }
717
718 TypeDecl *EliminateTypedef::mutate( TypeDecl *typeDecl ) {
719 std::map< std::string, TypedefDecl * >::iterator i = typedefNames.find( typeDecl->get_name() );
720 if ( i != typedefNames.end() ) {
721 typedefNames.erase( i ) ;
722 }
723 return typeDecl;
724 }
725
726 DeclarationWithType *EliminateTypedef::mutate( FunctionDecl *funcDecl ) {
727 std::map< std::string, TypedefDecl * > oldNames = typedefNames;
728 DeclarationWithType *ret = Mutator::mutate( funcDecl );
729 typedefNames = oldNames;
730 return ret;
731 }
732
733 ObjectDecl *EliminateTypedef::mutate( ObjectDecl *objDecl ) {
734 std::map< std::string, TypedefDecl * > oldNames = typedefNames;
735 ObjectDecl *ret = Mutator::mutate( objDecl );
736 typedefNames = oldNames;
737 return ret;
738 }
739
740 Expression *EliminateTypedef::mutate( CastExpr *castExpr ) {
741 std::map< std::string, TypedefDecl * > oldNames = typedefNames;
742 Expression *ret = Mutator::mutate( castExpr );
743 typedefNames = oldNames;
744 return ret;
745 }
746
747 CompoundStmt *EliminateTypedef::mutate( CompoundStmt *compoundStmt ) {
748 std::map< std::string, TypedefDecl * > oldNames = typedefNames;
749 CompoundStmt *ret = Mutator::mutate( compoundStmt );
750 std::list< Statement * >::iterator i = compoundStmt->get_kids().begin();
751 while ( i != compoundStmt->get_kids().end() ) {
752 std::list< Statement * >::iterator next = i;
753 ++next;
754 if ( DeclStmt *declStmt = dynamic_cast< DeclStmt * >( *i ) ) {
755 if ( dynamic_cast< TypedefDecl * >( declStmt->get_decl() ) ) {
756 delete *i;
757 compoundStmt->get_kids().erase( i );
758 }
759 }
760 i = next;
761 }
762 typedefNames = oldNames;
763 return ret;
764 }
765} // namespace SymTab
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