source: src/SymTab/Indexer.cc@ 0642216

ADT aaron-thesis arm-eh ast-experimental cleanup-dtors deferred_resn demangler enum forall-pointer-decay jacob/cs343-translation jenkins-sandbox 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 0642216 was fbcde64, checked in by Peter A. Buhr <pabuhr@…>, 9 years ago

remove duplication in compound literal, support aggregate-type compound literals
  • Property mode set to 100644
File size: 34.0 KB
Line 
1//
2// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
3//
4// The contents of this file are covered under the licence agreement in the
5// file "LICENCE" distributed with Cforall.
6//
7// Indexer.cc --
8//
9// Author : Richard C. Bilson
10// Created On : Sun May 17 21:37:33 2015
11// Last Modified By : Peter A. Buhr
12// Last Modified On : Thu Mar 30 16:38:47 2017
13// Update Count : 19
14//
15
16#include "Indexer.h"
17
18#include <string>
19#include <typeinfo>
20#include <unordered_map>
21#include <unordered_set>
22#include <utility>
23#include <algorithm>
24
25#include "Mangler.h"
26
27#include "Common/utility.h"
28
29#include "ResolvExpr/typeops.h"
30
31#include "SynTree/Declaration.h"
32#include "SynTree/Type.h"
33#include "SynTree/Expression.h"
34#include "SynTree/Initializer.h"
35#include "SynTree/Statement.h"
36
37#include "InitTweak/InitTweak.h"
38
39#define debugPrint(x) if ( doDebug ) { std::cout << x; }
40
41namespace SymTab {
42 struct NewScope {
43 NewScope( SymTab::Indexer & indexer ) : indexer( indexer ) { indexer.enterScope(); }
44 ~NewScope() { indexer.leaveScope(); }
45 SymTab::Indexer & indexer;
46 };
47
48 template< typename TreeType, typename VisitorType >
49 inline void acceptNewScope( TreeType *tree, VisitorType &visitor ) {
50 visitor.enterScope();
51 maybeAccept( tree, visitor );
52 visitor.leaveScope();
53 }
54
55 typedef std::unordered_map< std::string, DeclarationWithType* > MangleTable;
56 typedef std::unordered_map< std::string, MangleTable > IdTable;
57 typedef std::unordered_map< std::string, NamedTypeDecl* > TypeTable;
58 typedef std::unordered_map< std::string, StructDecl* > StructTable;
59 typedef std::unordered_map< std::string, EnumDecl* > EnumTable;
60 typedef std::unordered_map< std::string, UnionDecl* > UnionTable;
61 typedef std::unordered_map< std::string, TraitDecl* > TraitTable;
62
63 void dump( const IdTable &table, std::ostream &os ) {
64 for ( IdTable::const_iterator id = table.begin(); id != table.end(); ++id ) {
65 for ( MangleTable::const_iterator mangle = id->second.begin(); mangle != id->second.end(); ++mangle ) {
66 os << mangle->second << std::endl;
67 }
68 }
69 }
70
71 template< typename Decl >
72 void dump( const std::unordered_map< std::string, Decl* > &table, std::ostream &os ) {
73 for ( typename std::unordered_map< std::string, Decl* >::const_iterator it = table.begin(); it != table.end(); ++it ) {
74 os << it->second << std::endl;
75 } // for
76 }
77
78 struct Indexer::Impl {
79 Impl( unsigned long _scope ) : refCount(1), scope( _scope ), size( 0 ), base(),
80 idTable(), typeTable(), structTable(), enumTable(), unionTable(), traitTable() {}
81 Impl( unsigned long _scope, Indexer &&_base ) : refCount(1), scope( _scope ), size( 0 ), base( _base ),
82 idTable(), typeTable(), structTable(), enumTable(), unionTable(), traitTable() {}
83 unsigned long refCount; ///< Number of references to these tables
84 unsigned long scope; ///< Scope these tables are associated with
85 unsigned long size; ///< Number of elements stored in this table
86 const Indexer base; ///< Base indexer this extends
87
88 IdTable idTable; ///< Identifier namespace
89 TypeTable typeTable; ///< Type namespace
90 StructTable structTable; ///< Struct namespace
91 EnumTable enumTable; ///< Enum namespace
92 UnionTable unionTable; ///< Union namespace
93 TraitTable traitTable; ///< Trait namespace
94 };
95
96 Indexer::Impl *Indexer::newRef( Indexer::Impl *toClone ) {
97 if ( ! toClone ) return 0;
98
99 // shorten the search chain by skipping empty links
100 Indexer::Impl *ret = toClone->size == 0 ? toClone->base.tables : toClone;
101 if ( ret ) { ++ret->refCount; }
102
103 return ret;
104 }
105
106 void Indexer::deleteRef( Indexer::Impl *toFree ) {
107 if ( ! toFree ) return;
108
109 if ( --toFree->refCount == 0 ) delete toFree;
110 }
111
112 void Indexer::removeSpecialOverrides( const std::string &id, std::list< DeclarationWithType * > & out ) const {
113 // only need to perform this step for constructors, destructors, and assignment functions
114 if ( ! InitTweak::isCtorDtorAssign( id ) ) return;
115
116 // helpful data structure
117 struct ValueType {
118 struct DeclBall {
119 FunctionDecl * decl;
120 bool isUserDefinedFunc; // properties for this particular decl
121 bool isDefaultCtor;
122 bool isDtor;
123 bool isCopyFunc;
124 };
125 // properties for this type
126 bool userDefinedFunc = false; // any user-defined function found
127 bool userDefinedCtor = false; // any user-defined constructor found
128 bool userDefinedDtor = false; // any user-defined destructor found
129 bool userDefinedCopyFunc = false; // user-defined copy ctor found
130 std::list< DeclBall > decls;
131
132 // another FunctionDecl for the current type was found - determine
133 // if it has special properties and update data structure accordingly
134 ValueType & operator+=( FunctionDecl * function ) {
135 bool isUserDefinedFunc = ! LinkageSpec::isOverridable( function->get_linkage() );
136 bool isDefaultCtor = InitTweak::isDefaultConstructor( function );
137 bool isDtor = InitTweak::isDestructor( function );
138 bool isCopyFunc = InitTweak::isCopyFunction( function, function->get_name() );
139 decls.push_back( DeclBall{ function, isUserDefinedFunc, isDefaultCtor, isDtor, isCopyFunc } );
140 userDefinedFunc = userDefinedFunc || isUserDefinedFunc;
141 userDefinedCtor = userDefinedCtor || (isUserDefinedFunc && InitTweak::isConstructor( function->get_name() ) );
142 userDefinedDtor = userDefinedDtor || (isUserDefinedFunc && isDtor);
143 userDefinedCopyFunc = userDefinedCopyFunc || (isUserDefinedFunc && isCopyFunc);
144 return *this;
145 }
146 }; // ValueType
147
148 std::list< DeclarationWithType * > copy;
149 copy.splice( copy.end(), out );
150
151 // organize discovered declarations by type
152 std::unordered_map< std::string, ValueType > funcMap;
153 for ( DeclarationWithType * decl : copy ) {
154 if ( FunctionDecl * function = dynamic_cast< FunctionDecl * >( decl ) ) {
155 std::list< DeclarationWithType * > & params = function->get_functionType()->get_parameters();
156 assert( ! params.empty() );
157 // use base type of pointer, so that qualifiers on the pointer type aren't considered.
158 Type * base = safe_dynamic_cast< PointerType * >( params.front()->get_type() )->get_base();
159 funcMap[ Mangler::mangle( base ) ] += function;
160 } else {
161 out.push_back( decl );
162 }
163 }
164
165 // if a type contains user defined ctor/dtors, then special rules trigger, which determine
166 // the set of ctor/dtors that are seen by the requester. In particular, if the user defines
167 // a default ctor, then the generated default ctor should never be seen, likewise for copy ctor
168 // and dtor. If the user defines any ctor/dtor, then no generated field ctors should be seen.
169 // If the user defines any ctor then the generated default ctor should not be seen.
170 for ( std::pair< const std::string, ValueType > & pair : funcMap ) {
171 ValueType & val = pair.second;
172 for ( ValueType::DeclBall ball : val.decls ) {
173 if ( ! val.userDefinedFunc || ball.isUserDefinedFunc || (! val.userDefinedCtor && ball.isDefaultCtor) || (! val.userDefinedCopyFunc && ball.isCopyFunc) || (! val.userDefinedDtor && ball.isDtor) ) {
174 // decl conforms to the rules described above, so it should be seen by the requester
175 out.push_back( ball.decl );
176 }
177 }
178 }
179 }
180
181 void Indexer::makeWritable() {
182 if ( ! tables ) {
183 // create indexer if not yet set
184 tables = new Indexer::Impl( scope );
185 } else if ( tables->refCount > 1 || tables->scope != scope ) {
186 // make this indexer the base of a fresh indexer at the current scope
187 tables = new Indexer::Impl( scope, std::move( *this ) );
188 }
189 }
190
191 Indexer::Indexer( bool _doDebug ) : tables( 0 ), scope( 0 ), doDebug( _doDebug ) {}
192
193 Indexer::Indexer( const Indexer &that ) : tables( newRef( that.tables ) ), scope( that.scope ), doDebug( that.doDebug ) {}
194
195 Indexer::Indexer( Indexer &&that ) : tables( that.tables ), scope( that.scope ), doDebug( that.doDebug ) {
196 that.tables = 0;
197 }
198
199 Indexer::~Indexer() {
200 deleteRef( tables );
201 }
202
203 Indexer& Indexer::operator= ( const Indexer &that ) {
204 deleteRef( tables );
205
206 tables = newRef( that.tables );
207 scope = that.scope;
208 doDebug = that.doDebug;
209
210 return *this;
211 }
212
213 Indexer& Indexer::operator= ( Indexer &&that ) {
214 deleteRef( tables );
215
216 tables = that.tables;
217 scope = that.scope;
218 doDebug = that.doDebug;
219
220 that.tables = 0;
221
222 return *this;
223 }
224
225 void Indexer::visit( ObjectDecl *objectDecl ) {
226 enterScope();
227 maybeAccept( objectDecl->get_type(), *this );
228 leaveScope();
229 maybeAccept( objectDecl->get_init(), *this );
230 maybeAccept( objectDecl->get_bitfieldWidth(), *this );
231 if ( objectDecl->get_name() != "" ) {
232 debugPrint( "Adding object " << objectDecl->get_name() << std::endl );
233 addId( objectDecl );
234 } // if
235 }
236
237 void Indexer::visit( FunctionDecl *functionDecl ) {
238 if ( functionDecl->get_name() == "" ) return;
239 debugPrint( "Adding function " << functionDecl->get_name() << std::endl );
240 addId( functionDecl );
241 enterScope();
242 maybeAccept( functionDecl->get_functionType(), *this );
243 maybeAccept( functionDecl->get_statements(), *this );
244 leaveScope();
245 }
246
247
248// A NOTE ON THE ORDER OF TRAVERSAL
249//
250// Types and typedefs have their base types visited before they are added to the type table. This is ok, since there is
251// no such thing as a recursive type or typedef.
252//
253// typedef struct { T *x; } T; // never allowed
254//
255// for structs/unions, it is possible to have recursion, so the decl should be added as if it's incomplete to begin, the
256// members are traversed, and then the complete type should be added (assuming the type is completed by this particular
257// declaration).
258//
259// struct T { struct T *x; }; // allowed
260//
261// It is important to add the complete type to the symbol table *after* the members/base has been traversed, since that
262// traversal may modify the definition of the type and these modifications should be visible when the symbol table is
263// queried later in this pass.
264//
265// TODO: figure out whether recursive contexts are sensible/possible/reasonable.
266
267
268 void Indexer::visit( TypeDecl *typeDecl ) {
269 // see A NOTE ON THE ORDER OF TRAVERSAL, above
270 // note that assertions come after the type is added to the symtab, since they are not part of the type proper
271 // and may depend on the type itself
272 enterScope();
273 acceptAll( typeDecl->get_parameters(), *this );
274 maybeAccept( typeDecl->get_base(), *this );
275 leaveScope();
276 debugPrint( "Adding type " << typeDecl->get_name() << std::endl );
277 addType( typeDecl );
278 acceptAll( typeDecl->get_assertions(), *this );
279 }
280
281 void Indexer::visit( TypedefDecl *typeDecl ) {
282 enterScope();
283 acceptAll( typeDecl->get_parameters(), *this );
284 maybeAccept( typeDecl->get_base(), *this );
285 leaveScope();
286 debugPrint( "Adding typedef " << typeDecl->get_name() << std::endl );
287 addType( typeDecl );
288 }
289
290 void Indexer::visit( StructDecl *aggregateDecl ) {
291 // make up a forward declaration and add it before processing the members
292 // needs to be on the heap because addStruct saves the pointer
293 StructDecl &fwdDecl = *new StructDecl( aggregateDecl->get_name() );
294 cloneAll( aggregateDecl->get_parameters(), fwdDecl.get_parameters() );
295 debugPrint( "Adding fwd decl for struct " << fwdDecl.get_name() << std::endl );
296 addStruct( &fwdDecl );
297
298 enterScope();
299 acceptAll( aggregateDecl->get_parameters(), *this );
300 acceptAll( aggregateDecl->get_members(), *this );
301 leaveScope();
302
303 debugPrint( "Adding struct " << aggregateDecl->get_name() << std::endl );
304 // this addition replaces the forward declaration
305 addStruct( aggregateDecl );
306 }
307
308 void Indexer::visit( UnionDecl *aggregateDecl ) {
309 // make up a forward declaration and add it before processing the members
310 UnionDecl fwdDecl( aggregateDecl->get_name() );
311 cloneAll( aggregateDecl->get_parameters(), fwdDecl.get_parameters() );
312 debugPrint( "Adding fwd decl for union " << fwdDecl.get_name() << std::endl );
313 addUnion( &fwdDecl );
314
315 enterScope();
316 acceptAll( aggregateDecl->get_parameters(), *this );
317 acceptAll( aggregateDecl->get_members(), *this );
318 leaveScope();
319
320 debugPrint( "Adding union " << aggregateDecl->get_name() << std::endl );
321 addUnion( aggregateDecl );
322 }
323
324 void Indexer::visit( EnumDecl *aggregateDecl ) {
325 debugPrint( "Adding enum " << aggregateDecl->get_name() << std::endl );
326 addEnum( aggregateDecl );
327 // unlike structs, contexts, and unions, enums inject their members into the global scope
328 acceptAll( aggregateDecl->get_members(), *this );
329 }
330
331 void Indexer::visit( TraitDecl *aggregateDecl ) {
332 enterScope();
333 acceptAll( aggregateDecl->get_parameters(), *this );
334 acceptAll( aggregateDecl->get_members(), *this );
335 leaveScope();
336
337 debugPrint( "Adding context " << aggregateDecl->get_name() << std::endl );
338 addTrait( aggregateDecl );
339 }
340
341 void Indexer::visit( CompoundStmt *compoundStmt ) {
342 enterScope();
343 acceptAll( compoundStmt->get_kids(), *this );
344 leaveScope();
345 }
346
347
348 void Indexer::visit( ApplicationExpr *applicationExpr ) {
349 acceptNewScope( applicationExpr->get_result(), *this );
350 maybeAccept( applicationExpr->get_function(), *this );
351 acceptAll( applicationExpr->get_args(), *this );
352 }
353
354 void Indexer::visit( UntypedExpr *untypedExpr ) {
355 acceptNewScope( untypedExpr->get_result(), *this );
356 acceptAll( untypedExpr->get_args(), *this );
357 }
358
359 void Indexer::visit( NameExpr *nameExpr ) {
360 acceptNewScope( nameExpr->get_result(), *this );
361 }
362
363 void Indexer::visit( AddressExpr *addressExpr ) {
364 acceptNewScope( addressExpr->get_result(), *this );
365 maybeAccept( addressExpr->get_arg(), *this );
366 }
367
368 void Indexer::visit( LabelAddressExpr *labAddressExpr ) {
369 acceptNewScope( labAddressExpr->get_result(), *this );
370 maybeAccept( labAddressExpr->get_arg(), *this );
371 }
372
373 void Indexer::visit( CastExpr *castExpr ) {
374 acceptNewScope( castExpr->get_result(), *this );
375 maybeAccept( castExpr->get_arg(), *this );
376 }
377
378 void Indexer::visit( UntypedMemberExpr *memberExpr ) {
379 acceptNewScope( memberExpr->get_result(), *this );
380 maybeAccept( memberExpr->get_aggregate(), *this );
381 }
382
383 void Indexer::visit( MemberExpr *memberExpr ) {
384 acceptNewScope( memberExpr->get_result(), *this );
385 maybeAccept( memberExpr->get_aggregate(), *this );
386 }
387
388 void Indexer::visit( VariableExpr *variableExpr ) {
389 acceptNewScope( variableExpr->get_result(), *this );
390 }
391
392 void Indexer::visit( ConstantExpr *constantExpr ) {
393 acceptNewScope( constantExpr->get_result(), *this );
394 maybeAccept( constantExpr->get_constant(), *this );
395 }
396
397 void Indexer::visit( SizeofExpr *sizeofExpr ) {
398 acceptNewScope( sizeofExpr->get_result(), *this );
399 if ( sizeofExpr->get_isType() ) {
400 maybeAccept( sizeofExpr->get_type(), *this );
401 } else {
402 maybeAccept( sizeofExpr->get_expr(), *this );
403 }
404 }
405
406 void Indexer::visit( AlignofExpr *alignofExpr ) {
407 acceptNewScope( alignofExpr->get_result(), *this );
408 if ( alignofExpr->get_isType() ) {
409 maybeAccept( alignofExpr->get_type(), *this );
410 } else {
411 maybeAccept( alignofExpr->get_expr(), *this );
412 }
413 }
414
415 void Indexer::visit( UntypedOffsetofExpr *offsetofExpr ) {
416 acceptNewScope( offsetofExpr->get_result(), *this );
417 maybeAccept( offsetofExpr->get_type(), *this );
418 }
419
420 void Indexer::visit( OffsetofExpr *offsetofExpr ) {
421 acceptNewScope( offsetofExpr->get_result(), *this );
422 maybeAccept( offsetofExpr->get_type(), *this );
423 maybeAccept( offsetofExpr->get_member(), *this );
424 }
425
426 void Indexer::visit( OffsetPackExpr *offsetPackExpr ) {
427 acceptNewScope( offsetPackExpr->get_result(), *this );
428 maybeAccept( offsetPackExpr->get_type(), *this );
429 }
430
431 void Indexer::visit( AttrExpr *attrExpr ) {
432 acceptNewScope( attrExpr->get_result(), *this );
433 if ( attrExpr->get_isType() ) {
434 maybeAccept( attrExpr->get_type(), *this );
435 } else {
436 maybeAccept( attrExpr->get_expr(), *this );
437 }
438 }
439
440 void Indexer::visit( LogicalExpr *logicalExpr ) {
441 acceptNewScope( logicalExpr->get_result(), *this );
442 maybeAccept( logicalExpr->get_arg1(), *this );
443 maybeAccept( logicalExpr->get_arg2(), *this );
444 }
445
446 void Indexer::visit( ConditionalExpr *conditionalExpr ) {
447 acceptNewScope( conditionalExpr->get_result(), *this );
448 maybeAccept( conditionalExpr->get_arg1(), *this );
449 maybeAccept( conditionalExpr->get_arg2(), *this );
450 maybeAccept( conditionalExpr->get_arg3(), *this );
451 }
452
453 void Indexer::visit( CommaExpr *commaExpr ) {
454 acceptNewScope( commaExpr->get_result(), *this );
455 maybeAccept( commaExpr->get_arg1(), *this );
456 maybeAccept( commaExpr->get_arg2(), *this );
457 }
458
459 void Indexer::visit( TypeExpr *typeExpr ) {
460 acceptNewScope( typeExpr->get_result(), *this );
461 maybeAccept( typeExpr->get_type(), *this );
462 }
463
464 void Indexer::visit( AsmExpr *asmExpr ) {
465 maybeAccept( asmExpr->get_inout(), *this );
466 maybeAccept( asmExpr->get_constraint(), *this );
467 maybeAccept( asmExpr->get_operand(), *this );
468 }
469
470 void Indexer::visit( ImplicitCopyCtorExpr *impCpCtorExpr ) {
471 acceptNewScope( impCpCtorExpr->get_result(), *this );
472 maybeAccept( impCpCtorExpr->get_callExpr(), *this );
473 acceptAll( impCpCtorExpr->get_tempDecls(), *this );
474 acceptAll( impCpCtorExpr->get_returnDecls(), *this );
475 acceptAll( impCpCtorExpr->get_dtors(), *this );
476 }
477
478 void Indexer::visit( ConstructorExpr * ctorExpr ) {
479 acceptNewScope( ctorExpr->get_result(), *this );
480 maybeAccept( ctorExpr->get_callExpr(), *this );
481 }
482
483 void Indexer::visit( CompoundLiteralExpr *compLitExpr ) {
484 acceptNewScope( compLitExpr->get_result(), *this );
485 maybeAccept( compLitExpr->get_initializer(), *this );
486 }
487
488 void Indexer::visit( UntypedValofExpr *valofExpr ) {
489 acceptNewScope( valofExpr->get_result(), *this );
490 maybeAccept( valofExpr->get_body(), *this );
491 }
492
493 void Indexer::visit( RangeExpr *rangeExpr ) {
494 maybeAccept( rangeExpr->get_low(), *this );
495 maybeAccept( rangeExpr->get_high(), *this );
496 }
497
498 void Indexer::visit( UntypedTupleExpr *tupleExpr ) {
499 acceptNewScope( tupleExpr->get_result(), *this );
500 acceptAll( tupleExpr->get_exprs(), *this );
501 }
502
503 void Indexer::visit( TupleExpr *tupleExpr ) {
504 acceptNewScope( tupleExpr->get_result(), *this );
505 acceptAll( tupleExpr->get_exprs(), *this );
506 }
507
508 void Indexer::visit( TupleIndexExpr *tupleExpr ) {
509 acceptNewScope( tupleExpr->get_result(), *this );
510 maybeAccept( tupleExpr->get_tuple(), *this );
511 }
512
513 void Indexer::visit( MemberTupleExpr *tupleExpr ) {
514 acceptNewScope( tupleExpr->get_result(), *this );
515 maybeAccept( tupleExpr->get_member(), *this );
516 maybeAccept( tupleExpr->get_aggregate(), *this );
517 }
518
519 void Indexer::visit( TupleAssignExpr *tupleExpr ) {
520 acceptNewScope( tupleExpr->get_result(), *this );
521 maybeAccept( tupleExpr->get_stmtExpr(), *this );
522 }
523
524 void Indexer::visit( StmtExpr *stmtExpr ) {
525 acceptNewScope( stmtExpr->get_result(), *this );
526 maybeAccept( stmtExpr->get_statements(), *this );
527 acceptAll( stmtExpr->get_returnDecls(), *this );
528 acceptAll( stmtExpr->get_dtors(), *this );
529 }
530
531 void Indexer::visit( UniqueExpr *uniqueExpr ) {
532 acceptNewScope( uniqueExpr->get_result(), *this );
533 maybeAccept( uniqueExpr->get_expr(), *this );
534 }
535
536
537 void Indexer::visit( TraitInstType *contextInst ) {
538 acceptAll( contextInst->get_parameters(), *this );
539 acceptAll( contextInst->get_members(), *this );
540 }
541
542 void Indexer::visit( StructInstType *structInst ) {
543 if ( ! lookupStruct( structInst->get_name() ) ) {
544 debugPrint( "Adding struct " << structInst->get_name() << " from implicit forward declaration" << std::endl );
545 addStruct( structInst->get_name() );
546 }
547 enterScope();
548 acceptAll( structInst->get_parameters(), *this );
549 leaveScope();
550 }
551
552 void Indexer::visit( UnionInstType *unionInst ) {
553 if ( ! lookupUnion( unionInst->get_name() ) ) {
554 debugPrint( "Adding union " << unionInst->get_name() << " from implicit forward declaration" << std::endl );
555 addUnion( unionInst->get_name() );
556 }
557 enterScope();
558 acceptAll( unionInst->get_parameters(), *this );
559 leaveScope();
560 }
561
562 void Indexer::visit( ForStmt *forStmt ) {
563 // for statements introduce a level of scope
564 enterScope();
565 Visitor::visit( forStmt );
566 leaveScope();
567 }
568
569
570
571 void Indexer::lookupId( const std::string &id, std::list< DeclarationWithType* > &out ) const {
572 std::unordered_set< std::string > foundMangleNames;
573
574 Indexer::Impl *searchTables = tables;
575 while ( searchTables ) {
576
577 IdTable::const_iterator decls = searchTables->idTable.find( id );
578 if ( decls != searchTables->idTable.end() ) {
579 const MangleTable &mangleTable = decls->second;
580 for ( MangleTable::const_iterator decl = mangleTable.begin(); decl != mangleTable.end(); ++decl ) {
581 // mark the mangled name as found, skipping this insertion if a declaration for that name has already been found
582 if ( foundMangleNames.insert( decl->first ).second == false ) continue;
583
584 out.push_back( decl->second );
585 }
586 }
587
588 // get declarations from base indexers
589 searchTables = searchTables->base.tables;
590 }
591
592 // some special functions, e.g. constructors and destructors
593 // remove autogenerated functions when they are defined so that
594 // they can never be matched
595 removeSpecialOverrides( id, out );
596 }
597
598 NamedTypeDecl *Indexer::lookupType( const std::string &id ) const {
599 if ( ! tables ) return 0;
600
601 TypeTable::const_iterator ret = tables->typeTable.find( id );
602 return ret != tables->typeTable.end() ? ret->second : tables->base.lookupType( id );
603 }
604
605 StructDecl *Indexer::lookupStruct( const std::string &id ) const {
606 if ( ! tables ) return 0;
607
608 StructTable::const_iterator ret = tables->structTable.find( id );
609 return ret != tables->structTable.end() ? ret->second : tables->base.lookupStruct( id );
610 }
611
612 EnumDecl *Indexer::lookupEnum( const std::string &id ) const {
613 if ( ! tables ) return 0;
614
615 EnumTable::const_iterator ret = tables->enumTable.find( id );
616 return ret != tables->enumTable.end() ? ret->second : tables->base.lookupEnum( id );
617 }
618
619 UnionDecl *Indexer::lookupUnion( const std::string &id ) const {
620 if ( ! tables ) return 0;
621
622 UnionTable::const_iterator ret = tables->unionTable.find( id );
623 return ret != tables->unionTable.end() ? ret->second : tables->base.lookupUnion( id );
624 }
625
626 TraitDecl *Indexer::lookupTrait( const std::string &id ) const {
627 if ( ! tables ) return 0;
628
629 TraitTable::const_iterator ret = tables->traitTable.find( id );
630 return ret != tables->traitTable.end() ? ret->second : tables->base.lookupTrait( id );
631 }
632
633 DeclarationWithType *Indexer::lookupIdAtScope( const std::string &id, const std::string &mangleName, unsigned long scope ) const {
634 if ( ! tables ) return 0;
635 if ( tables->scope < scope ) return 0;
636
637 IdTable::const_iterator decls = tables->idTable.find( id );
638 if ( decls != tables->idTable.end() ) {
639 const MangleTable &mangleTable = decls->second;
640 MangleTable::const_iterator decl = mangleTable.find( mangleName );
641 if ( decl != mangleTable.end() ) return decl->second;
642 }
643
644 return tables->base.lookupIdAtScope( id, mangleName, scope );
645 }
646
647 bool Indexer::hasIncompatibleCDecl( const std::string &id, const std::string &mangleName, unsigned long scope ) const {
648 if ( ! tables ) return false;
649 if ( tables->scope < scope ) return false;
650
651 IdTable::const_iterator decls = tables->idTable.find( id );
652 if ( decls != tables->idTable.end() ) {
653 const MangleTable &mangleTable = decls->second;
654 for ( MangleTable::const_iterator decl = mangleTable.begin(); decl != mangleTable.end(); ++decl ) {
655 // check for C decls with the same name, skipping those with a compatible type (by mangleName)
656 if ( decl->second->get_linkage() == LinkageSpec::C && decl->first != mangleName ) return true;
657 }
658 }
659
660 return tables->base.hasIncompatibleCDecl( id, mangleName, scope );
661 }
662
663 bool Indexer::hasCompatibleCDecl( const std::string &id, const std::string &mangleName, unsigned long scope ) const {
664 if ( ! tables ) return false;
665 if ( tables->scope < scope ) return false;
666
667 IdTable::const_iterator decls = tables->idTable.find( id );
668 if ( decls != tables->idTable.end() ) {
669 const MangleTable &mangleTable = decls->second;
670 for ( MangleTable::const_iterator decl = mangleTable.begin(); decl != mangleTable.end(); ++decl ) {
671 // check for C decls with the same name, skipping
672 // those with an incompatible type (by mangleName)
673 if ( decl->second->get_linkage() == LinkageSpec::C && decl->first == mangleName ) return true;
674 }
675 }
676
677 return tables->base.hasCompatibleCDecl( id, mangleName, scope );
678 }
679
680 NamedTypeDecl *Indexer::lookupTypeAtScope( const std::string &id, unsigned long scope ) const {
681 if ( ! tables ) return 0;
682 if ( tables->scope < scope ) return 0;
683
684 TypeTable::const_iterator ret = tables->typeTable.find( id );
685 return ret != tables->typeTable.end() ? ret->second : tables->base.lookupTypeAtScope( id, scope );
686 }
687
688 StructDecl *Indexer::lookupStructAtScope( const std::string &id, unsigned long scope ) const {
689 if ( ! tables ) return 0;
690 if ( tables->scope < scope ) return 0;
691
692 StructTable::const_iterator ret = tables->structTable.find( id );
693 return ret != tables->structTable.end() ? ret->second : tables->base.lookupStructAtScope( id, scope );
694 }
695
696 EnumDecl *Indexer::lookupEnumAtScope( const std::string &id, unsigned long scope ) const {
697 if ( ! tables ) return 0;
698 if ( tables->scope < scope ) return 0;
699
700 EnumTable::const_iterator ret = tables->enumTable.find( id );
701 return ret != tables->enumTable.end() ? ret->second : tables->base.lookupEnumAtScope( id, scope );
702 }
703
704 UnionDecl *Indexer::lookupUnionAtScope( const std::string &id, unsigned long scope ) const {
705 if ( ! tables ) return 0;
706 if ( tables->scope < scope ) return 0;
707
708 UnionTable::const_iterator ret = tables->unionTable.find( id );
709 return ret != tables->unionTable.end() ? ret->second : tables->base.lookupUnionAtScope( id, scope );
710 }
711
712 TraitDecl *Indexer::lookupTraitAtScope( const std::string &id, unsigned long scope ) const {
713 if ( ! tables ) return 0;
714 if ( tables->scope < scope ) return 0;
715
716 TraitTable::const_iterator ret = tables->traitTable.find( id );
717 return ret != tables->traitTable.end() ? ret->second : tables->base.lookupTraitAtScope( id, scope );
718 }
719
720 bool addedIdConflicts( DeclarationWithType *existing, DeclarationWithType *added ) {
721 // if we're giving the same name mangling to things of different types then there is something wrong
722 assert( (dynamic_cast<ObjectDecl*>( added ) && dynamic_cast<ObjectDecl*>( existing ) )
723 || (dynamic_cast<FunctionDecl*>( added ) && dynamic_cast<FunctionDecl*>( existing ) ) );
724
725 if ( LinkageSpec::isOverridable( existing->get_linkage() ) ) {
726 // new definition shadows the autogenerated one, even at the same scope
727 return false;
728 } else if ( added->get_linkage() != LinkageSpec::C || ResolvExpr::typesCompatible( added->get_type(), existing->get_type(), Indexer() ) ) {
729 // typesCompatible doesn't really do the right thing here. When checking compatibility of function types,
730 // we should ignore outermost pointer qualifiers, except _Atomic?
731 FunctionDecl *newentry = dynamic_cast< FunctionDecl* >( added );
732 FunctionDecl *oldentry = dynamic_cast< FunctionDecl* >( existing );
733 if ( newentry && oldentry ) {
734 if ( newentry->get_statements() && oldentry->get_statements() ) {
735 throw SemanticError( "duplicate function definition for ", added );
736 } // if
737 } else {
738 // two objects with the same mangled name defined in the same scope.
739 // both objects must be marked extern or both must be intrinsic for this to be okay
740 // xxx - perhaps it's actually if either is intrinsic then this is okay?
741 // might also need to be same storage class?
742 ObjectDecl *newobj = dynamic_cast< ObjectDecl* >( added );
743 ObjectDecl *oldobj = dynamic_cast< ObjectDecl* >( existing );
744 if ( ! newobj->get_storageClasses().is_extern && ! oldobj->get_storageClasses().is_extern ) {
745 throw SemanticError( "duplicate object definition for ", added );
746 } // if
747 } // if
748 } else {
749 throw SemanticError( "duplicate definition for ", added );
750 } // if
751
752 return true;
753 }
754
755 void Indexer::addId( DeclarationWithType *decl ) {
756 makeWritable();
757
758 const std::string &name = decl->get_name();
759 std::string mangleName;
760 if ( LinkageSpec::isOverridable( decl->get_linkage() ) ) {
761 // mangle the name without including the appropriate suffix, so overridable routines are placed into the
762 // same "bucket" as their user defined versions.
763 mangleName = Mangler::mangle( decl, false );
764 } else {
765 mangleName = Mangler::mangle( decl );
766 } // if
767
768 // this ensures that no two declarations with the same unmangled name at the same scope both have C linkage
769 if ( decl->get_linkage() == LinkageSpec::C ) {
770 // NOTE this is broken in Richard's original code in such a way that it never triggers (it
771 // doesn't check decls that have the same manglename, and all C-linkage decls are defined to
772 // have their name as their manglename, hence the error can never trigger).
773 // The code here is closer to correct, but name mangling would have to be completely
774 // isomorphic to C type-compatibility, which it may not be.
775 if ( hasIncompatibleCDecl( name, mangleName, scope ) ) {
776 throw SemanticError( "conflicting overload of C function ", decl );
777 }
778 } else {
779 // Check that a Cforall declaration doesn't overload any C declaration
780 if ( hasCompatibleCDecl( name, mangleName, scope ) ) {
781 throw SemanticError( "Cforall declaration hides C function ", decl );
782 }
783 }
784
785 // Skip repeat declarations of the same identifier
786 DeclarationWithType *existing = lookupIdAtScope( name, mangleName, scope );
787 if ( existing && addedIdConflicts( existing, decl ) ) return;
788
789 // add to indexer
790 tables->idTable[ name ][ mangleName ] = decl;
791 ++tables->size;
792 }
793
794 bool addedTypeConflicts( NamedTypeDecl *existing, NamedTypeDecl *added ) {
795 if ( existing->get_base() == 0 ) {
796 return false;
797 } else if ( added->get_base() == 0 ) {
798 return true;
799 } else {
800 throw SemanticError( "redeclaration of ", added );
801 }
802 }
803
804 void Indexer::addType( NamedTypeDecl *decl ) {
805 makeWritable();
806
807 const std::string &id = decl->get_name();
808 TypeTable::iterator existing = tables->typeTable.find( id );
809 if ( existing == tables->typeTable.end() ) {
810 NamedTypeDecl *parent = tables->base.lookupTypeAtScope( id, scope );
811 if ( ! parent || ! addedTypeConflicts( parent, decl ) ) {
812 tables->typeTable.insert( existing, std::make_pair( id, decl ) );
813 ++tables->size;
814 }
815 } else {
816 if ( ! addedTypeConflicts( existing->second, decl ) ) {
817 existing->second = decl;
818 }
819 }
820 }
821
822 bool addedDeclConflicts( AggregateDecl *existing, AggregateDecl *added ) {
823 if ( existing->get_members().empty() ) {
824 return false;
825 } else if ( ! added->get_members().empty() ) {
826 throw SemanticError( "redeclaration of ", added );
827 } // if
828 return true;
829 }
830
831 void Indexer::addStruct( const std::string &id ) {
832 addStruct( new StructDecl( id ) );
833 }
834
835 void Indexer::addStruct( StructDecl *decl ) {
836 makeWritable();
837
838 const std::string &id = decl->get_name();
839 StructTable::iterator existing = tables->structTable.find( id );
840 if ( existing == tables->structTable.end() ) {
841 StructDecl *parent = tables->base.lookupStructAtScope( id, scope );
842 if ( ! parent || ! addedDeclConflicts( parent, decl ) ) {
843 tables->structTable.insert( existing, std::make_pair( id, decl ) );
844 ++tables->size;
845 }
846 } else {
847 if ( ! addedDeclConflicts( existing->second, decl ) ) {
848 existing->second = decl;
849 }
850 }
851 }
852
853 void Indexer::addEnum( EnumDecl *decl ) {
854 makeWritable();
855
856 const std::string &id = decl->get_name();
857 EnumTable::iterator existing = tables->enumTable.find( id );
858 if ( existing == tables->enumTable.end() ) {
859 EnumDecl *parent = tables->base.lookupEnumAtScope( id, scope );
860 if ( ! parent || ! addedDeclConflicts( parent, decl ) ) {
861 tables->enumTable.insert( existing, std::make_pair( id, decl ) );
862 ++tables->size;
863 }
864 } else {
865 if ( ! addedDeclConflicts( existing->second, decl ) ) {
866 existing->second = decl;
867 }
868 }
869 }
870
871 void Indexer::addUnion( const std::string &id ) {
872 addUnion( new UnionDecl( id ) );
873 }
874
875 void Indexer::addUnion( UnionDecl *decl ) {
876 makeWritable();
877
878 const std::string &id = decl->get_name();
879 UnionTable::iterator existing = tables->unionTable.find( id );
880 if ( existing == tables->unionTable.end() ) {
881 UnionDecl *parent = tables->base.lookupUnionAtScope( id, scope );
882 if ( ! parent || ! addedDeclConflicts( parent, decl ) ) {
883 tables->unionTable.insert( existing, std::make_pair( id, decl ) );
884 ++tables->size;
885 }
886 } else {
887 if ( ! addedDeclConflicts( existing->second, decl ) ) {
888 existing->second = decl;
889 }
890 }
891 }
892
893 void Indexer::addTrait( TraitDecl *decl ) {
894 makeWritable();
895
896 const std::string &id = decl->get_name();
897 TraitTable::iterator existing = tables->traitTable.find( id );
898 if ( existing == tables->traitTable.end() ) {
899 TraitDecl *parent = tables->base.lookupTraitAtScope( id, scope );
900 if ( ! parent || ! addedDeclConflicts( parent, decl ) ) {
901 tables->traitTable.insert( existing, std::make_pair( id, decl ) );
902 ++tables->size;
903 }
904 } else {
905 if ( ! addedDeclConflicts( existing->second, decl ) ) {
906 existing->second = decl;
907 }
908 }
909 }
910
911 void Indexer::enterScope() {
912 ++scope;
913
914 if ( doDebug ) {
915 std::cout << "--- Entering scope " << scope << std::endl;
916 }
917 }
918
919 void Indexer::leaveScope() {
920 using std::cout;
921
922 assert( scope > 0 && "cannot leave initial scope" );
923 --scope;
924
925 while ( tables && tables->scope > scope ) {
926 if ( doDebug ) {
927 cout << "--- Leaving scope " << tables->scope << " containing" << std::endl;
928 dump( tables->idTable, cout );
929 dump( tables->typeTable, cout );
930 dump( tables->structTable, cout );
931 dump( tables->enumTable, cout );
932 dump( tables->unionTable, cout );
933 dump( tables->traitTable, cout );
934 }
935
936 // swap tables for base table until we find one at an appropriate scope
937 Indexer::Impl *base = newRef( tables->base.tables );
938 deleteRef( tables );
939 tables = base;
940 }
941 }
942
943 void Indexer::print( std::ostream &os, int indent ) const {
944 using std::cerr;
945
946 if ( tables ) {
947 os << "--- scope " << tables->scope << " ---" << std::endl;
948
949 os << "===idTable===" << std::endl;
950 dump( tables->idTable, os );
951 os << "===typeTable===" << std::endl;
952 dump( tables->typeTable, os );
953 os << "===structTable===" << std::endl;
954 dump( tables->structTable, os );
955 os << "===enumTable===" << std::endl;
956 dump( tables->enumTable, os );
957 os << "===unionTable===" << std::endl;
958 dump( tables->unionTable, os );
959 os << "===contextTable===" << std::endl;
960 dump( tables->traitTable, os );
961
962 tables->base.print( os, indent );
963 } else {
964 os << "--- end ---" << std::endl;
965 }
966
967 }
968} // namespace SymTab
969
970// Local Variables: //
971// tab-width: 4 //
972// mode: c++ //
973// compile-command: "make install" //
974// End: //
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