source: src/CodeGen/CodeGenerator.cc@ 620cb95

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 620cb95 was a9a259c, checked in by Rob Schluntz <rschlunt@…>, 10 years ago

autogenerate union ctor/dtors, autogenerate struct copy ctor, temporarily allow explicit calls to autogenerated ctors, add copy ctor to type constraints
  • Property mode set to 100644
File size: 21.4 KB
Line 
1//
2// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
3//
4// The contents of this file are covered under the licence agreement in the
5// file "LICENCE" distributed with Cforall.
6//
7// CodeGenerator.cc --
8//
9// Author : Richard C. Bilson
10// Created On : Mon May 18 07:44:20 2015
11// Last Modified By : Rob Schluntz
12// Last Modified On : Tue Feb 09 13:24:40 2016
13// Update Count : 255
14//
15
16#include <algorithm>
17#include <iostream>
18#include <cassert>
19#include <list>
20
21#include "Parser/ParseNode.h"
22
23#include "SynTree/Type.h"
24#include "SynTree/Expression.h"
25#include "SynTree/Initializer.h"
26#include "SynTree/Statement.h"
27
28#include "Common/utility.h"
29#include "Common/UnimplementedError.h"
30
31#include "CodeGenerator.h"
32#include "OperatorTable.h"
33#include "GenType.h"
34
35using namespace std;
36
37namespace CodeGen {
38 int CodeGenerator::tabsize = 4;
39
40 // the kinds of statements that would ideally be followed by whitespace
41 bool wantSpacing( Statement * stmt) {
42 return dynamic_cast< IfStmt * >( stmt ) || dynamic_cast< CompoundStmt * >( stmt ) ||
43 dynamic_cast< WhileStmt * >( stmt ) || dynamic_cast< ForStmt * > ( stmt ) || dynamic_cast< SwitchStmt *>( stmt );
44 }
45
46 ostream & CodeGenerator::Indenter::operator()( ostream & output ) {
47 return output << string( cg.cur_indent, ' ' );
48 }
49
50 ostream & operator<<( ostream & output, CodeGenerator::Indenter &indent ) {
51 return indent( output );
52 }
53
54 CodeGenerator::CodeGenerator( std::ostream &os ) : indent( *this), cur_indent( 0 ), insideFunction( false ), output( os ) { }
55
56 CodeGenerator::CodeGenerator( std::ostream &os, std::string init, int indentation, bool infunp )
57 : indent( *this), cur_indent( indentation ), insideFunction( infunp ), output( os ) {
58 //output << std::string( init );
59 }
60
61 CodeGenerator::CodeGenerator( std::ostream &os, char *init, int indentation, bool infunp )
62 : indent( *this ), cur_indent( indentation ), insideFunction( infunp ), output( os ) {
63 //output << std::string( init );
64 }
65
66 string mangleName( DeclarationWithType *decl ) {
67 if ( decl->get_mangleName() != "" ) {
68 return decl->get_mangleName();
69 } else {
70 return decl->get_name();
71 } // if
72 }
73
74 //*** Declarations
75 void CodeGenerator::visit( FunctionDecl *functionDecl ) {
76 handleStorageClass( functionDecl );
77 if ( functionDecl->get_isInline() ) {
78 output << "inline ";
79 } // if
80 if ( functionDecl->get_isNoreturn() ) {
81 output << "_Noreturn ";
82 } // if
83 output << genType( functionDecl->get_functionType(), mangleName( functionDecl ) );
84
85 // how to get this to the Functype?
86 std::list< Declaration * > olds = functionDecl->get_oldDecls();
87 if ( ! olds.empty() ) {
88 output << " /* function has old declaration */";
89 } // if
90
91 // acceptAll( functionDecl->get_oldDecls(), *this );
92 if ( functionDecl->get_statements() ) {
93 functionDecl->get_statements()->accept( *this );
94 } // if
95 }
96
97 void CodeGenerator::visit( ObjectDecl *objectDecl ) {
98 handleStorageClass( objectDecl );
99 output << genType( objectDecl->get_type(), mangleName( objectDecl ) );
100
101 if ( objectDecl->get_init() ) {
102 output << " = ";
103 objectDecl->get_init()->accept( *this );
104 } // if
105 if ( objectDecl->get_bitfieldWidth() ) {
106 output << ":";
107 objectDecl->get_bitfieldWidth()->accept( *this );
108 } // if
109 }
110
111 void CodeGenerator::handleAggregate( AggregateDecl *aggDecl ) {
112 if ( aggDecl->get_name() != "" )
113 output << aggDecl->get_name();
114
115 std::list< Declaration * > &memb = aggDecl->get_members();
116
117 if ( ! memb.empty() ) {
118 output << " {" << endl;
119
120 cur_indent += CodeGenerator::tabsize;
121 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) {
122 output << indent;
123 (*i)->accept( *this );
124 output << ";" << endl;
125 }
126
127 cur_indent -= CodeGenerator::tabsize;
128
129 output << indent << "}";
130 } // if
131 }
132
133 void CodeGenerator::visit( StructDecl *structDecl ) {
134 output << "struct ";
135 handleAggregate( structDecl );
136 }
137
138 void CodeGenerator::visit( UnionDecl *aggregateDecl ) {
139 output << "union ";
140 handleAggregate( aggregateDecl );
141 }
142
143 void CodeGenerator::visit( EnumDecl *aggDecl ) {
144 output << "enum ";
145
146 if ( aggDecl->get_name() != "" )
147 output << aggDecl->get_name();
148
149 std::list< Declaration* > &memb = aggDecl->get_members();
150
151 if ( ! memb.empty() ) {
152 output << " {" << endl;
153
154 cur_indent += CodeGenerator::tabsize;
155 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) {
156 ObjectDecl *obj = dynamic_cast< ObjectDecl* >( *i );
157 assert( obj );
158 output << indent << mangleName( obj );
159 if ( obj->get_init() ) {
160 output << " = ";
161 obj->get_init()->accept( *this );
162 } // if
163 output << "," << endl;
164 } // for
165
166 cur_indent -= CodeGenerator::tabsize;
167
168 output << indent << "}";
169 } // if
170 }
171
172 void CodeGenerator::visit( ContextDecl *aggregateDecl ) {}
173
174 void CodeGenerator::visit( TypedefDecl *typeDecl ) {
175 output << "typedef ";
176 output << genType( typeDecl->get_base(), typeDecl->get_name() );
177 }
178
179 void CodeGenerator::visit( TypeDecl *typeDecl ) {
180 // really, we should mutate this into something that isn't a TypeDecl but that requires large-scale changes,
181 // still to be done
182 output << "extern unsigned long " << typeDecl->get_name();
183 if ( typeDecl->get_base() ) {
184 output << " = sizeof( " << genType( typeDecl->get_base(), "" ) << " )";
185 } // if
186 }
187
188 void CodeGenerator::printDesignators( std::list< Expression * > & designators ) {
189 typedef std::list< Expression * > DesignatorList;
190 if ( designators.size() == 0 ) return;
191 for ( DesignatorList::iterator iter = designators.begin(); iter != designators.end(); ++iter ) {
192 if ( dynamic_cast< NameExpr * >( *iter ) ) {
193 // if expression is a name, then initializing aggregate member
194 output << ".";
195 (*iter)->accept( *this );
196 } else {
197 // if not a simple name, it has to be a constant expression, i.e. an array designator
198 output << "[";
199 (*iter)->accept( *this );
200 output << "]";
201 }
202 }
203 output << " = ";
204 }
205
206 void CodeGenerator::visit( SingleInit *init ) {
207 printDesignators( init->get_designators() );
208 init->get_value()->accept( *this );
209 }
210
211 void CodeGenerator::visit( ListInit *init ) {
212 printDesignators( init->get_designators() );
213 output << "{ ";
214 genCommaList( init->begin_initializers(), init->end_initializers() );
215 output << " }";
216 }
217
218 void CodeGenerator::visit( Constant *constant ) {
219 output << constant->get_value() ;
220 }
221
222 //*** Expressions
223 void CodeGenerator::visit( ApplicationExpr *applicationExpr ) {
224 if ( VariableExpr *varExpr = dynamic_cast< VariableExpr* >( applicationExpr->get_function() ) ) {
225 OperatorInfo opInfo;
226 if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( varExpr->get_var()->get_name(), opInfo ) ) {
227 std::list< Expression* >::iterator arg = applicationExpr->get_args().begin();
228 switch ( opInfo.type ) {
229 case OT_PREFIXASSIGN:
230 case OT_POSTFIXASSIGN:
231 case OT_INFIXASSIGN:
232 {
233 assert( arg != applicationExpr->get_args().end() );
234 if ( AddressExpr *addrExpr = dynamic_cast< AddressExpr * >( *arg ) ) {
235
236 *arg = addrExpr->get_arg();
237 } else {
238 UntypedExpr *newExpr = new UntypedExpr( new NameExpr( "*?" ) );
239 newExpr->get_args().push_back( *arg );
240 *arg = newExpr;
241 } // if
242 break;
243 }
244
245 default:
246 // do nothing
247 ;
248 }
249
250 switch ( opInfo.type ) {
251 case OT_INDEX:
252 assert( applicationExpr->get_args().size() == 2 );
253 (*arg++)->accept( *this );
254 output << "[";
255 (*arg)->accept( *this );
256 output << "]";
257 break;
258
259 case OT_CALL:
260 // there are no intrinsic definitions of the function call operator or constructors or destructors
261 assert( false );
262 break;
263
264 case OT_CTOR:
265 // it's just an optimization to disallow this, so for now let it through
266 // since it makes autogenerating constructors a lot easier
267 varExpr->accept( *this );
268 output << "(";
269 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
270 output << ")";
271
272 // intrinsic constructors should never be called directly - they should be transformed back into Initializer nodes
273 // assert(false);
274 break;
275
276 case OT_DTOR:
277 // intrinsic destructors do nothing - don't generate any code
278 output << " // " << dynamic_cast<VariableExpr*>(applicationExpr->get_function())->get_var()->get_name() << endl;
279 break;
280
281 case OT_PREFIX:
282 case OT_PREFIXASSIGN:
283 assert( applicationExpr->get_args().size() == 1 );
284 output << "(";
285 output << opInfo.symbol;
286 (*arg)->accept( *this );
287 output << ")";
288 break;
289
290 case OT_POSTFIX:
291 case OT_POSTFIXASSIGN:
292 assert( applicationExpr->get_args().size() == 1 );
293 (*arg)->accept( *this );
294 output << opInfo.symbol;
295 break;
296
297
298 case OT_INFIX:
299 case OT_INFIXASSIGN:
300 assert( applicationExpr->get_args().size() == 2 );
301 output << "(";
302 (*arg++)->accept( *this );
303 output << opInfo.symbol;
304 (*arg)->accept( *this );
305 output << ")";
306 break;
307
308 case OT_CONSTANT:
309 case OT_LABELADDRESS:
310 // there are no intrinsic definitions of 0/1 or label addresses as functions
311 assert( false );
312 }
313 } else {
314 varExpr->accept( *this );
315 output << "(";
316 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
317 output << ")";
318 } // if
319 } else {
320 applicationExpr->get_function()->accept( *this );
321 output << "(";
322 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
323 output << ")";
324 } // if
325 }
326
327 void CodeGenerator::visit( UntypedExpr *untypedExpr ) {
328 if ( NameExpr *nameExpr = dynamic_cast< NameExpr* >( untypedExpr->get_function() ) ) {
329 OperatorInfo opInfo;
330 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
331 std::list< Expression* >::iterator arg = untypedExpr->get_args().begin();
332 switch ( opInfo.type ) {
333 case OT_INDEX:
334 assert( untypedExpr->get_args().size() == 2 );
335 (*arg++)->accept( *this );
336 output << "[";
337 (*arg)->accept( *this );
338 output << "]";
339 break;
340
341 case OT_CALL:
342 assert( false );
343
344 case OT_CTOR:
345 case OT_DTOR:
346 // intrinsic constructors should never be called
347 // intrinsic destructors do nothing
348 break;
349
350 case OT_PREFIX:
351 case OT_PREFIXASSIGN:
352 case OT_LABELADDRESS:
353 assert( untypedExpr->get_args().size() == 1 );
354 output << "(";
355 output << opInfo.symbol;
356 (*arg)->accept( *this );
357 output << ")";
358 break;
359
360 case OT_POSTFIX:
361 case OT_POSTFIXASSIGN:
362 assert( untypedExpr->get_args().size() == 1 );
363 (*arg)->accept( *this );
364 output << opInfo.symbol;
365 break;
366
367 case OT_INFIX:
368 case OT_INFIXASSIGN:
369 assert( untypedExpr->get_args().size() == 2 );
370 output << "(";
371 (*arg++)->accept( *this );
372 output << opInfo.symbol;
373 (*arg)->accept( *this );
374 output << ")";
375 break;
376
377 case OT_CONSTANT:
378 // there are no intrinsic definitions of 0 or 1 as functions
379 assert( false );
380 }
381 } else {
382 nameExpr->accept( *this );
383 output << "(";
384 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
385 output << ")";
386 } // if
387 } else {
388 untypedExpr->get_function()->accept( *this );
389 output << "(";
390 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
391 output << ")";
392 } // if
393 }
394
395 void CodeGenerator::visit( NameExpr *nameExpr ) {
396 OperatorInfo opInfo;
397 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
398 assert( opInfo.type == OT_CONSTANT );
399 output << opInfo.symbol;
400 } else {
401 output << nameExpr->get_name();
402 } // if
403 }
404
405 void CodeGenerator::visit( AddressExpr *addressExpr ) {
406 output << "(&";
407 // this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address
408 if ( VariableExpr *variableExpr = dynamic_cast< VariableExpr* >( addressExpr->get_arg() ) ) {
409 output << mangleName( variableExpr->get_var() );
410 } else {
411 addressExpr->get_arg()->accept( *this );
412 } // if
413 output << ")";
414 }
415
416 void CodeGenerator::visit( CastExpr *castExpr ) {
417 output << "(";
418 if ( castExpr->get_results().empty() ) {
419 output << "(void)" ;
420 } else if ( ! castExpr->get_results().front()->get_isLvalue() ) {
421 // at least one result type of cast, but not an lvalue
422 output << "(";
423 output << genType( castExpr->get_results().front(), "" );
424 output << ")";
425 } else {
426 // otherwise, the cast is to an lvalue type, so the cast
427 // should be dropped, since the result of a cast is
428 // never an lvalue in C
429 }
430 castExpr->get_arg()->accept( *this );
431 output << ")";
432 }
433
434 void CodeGenerator::visit( UntypedMemberExpr *memberExpr ) {
435 assert( false );
436 }
437
438 void CodeGenerator::visit( MemberExpr *memberExpr ) {
439 memberExpr->get_aggregate()->accept( *this );
440 output << "." << mangleName( memberExpr->get_member() );
441 }
442
443 void CodeGenerator::visit( VariableExpr *variableExpr ) {
444 OperatorInfo opInfo;
445 if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) {
446 output << opInfo.symbol;
447 } else {
448 output << mangleName( variableExpr->get_var() );
449 } // if
450 }
451
452 void CodeGenerator::visit( ConstantExpr *constantExpr ) {
453 assert( constantExpr->get_constant() );
454 constantExpr->get_constant()->accept( *this );
455 }
456
457 void CodeGenerator::visit( SizeofExpr *sizeofExpr ) {
458 output << "sizeof(";
459 if ( sizeofExpr->get_isType() ) {
460 output << genType( sizeofExpr->get_type(), "" );
461 } else {
462 sizeofExpr->get_expr()->accept( *this );
463 } // if
464 output << ")";
465 }
466
467 void CodeGenerator::visit( AlignofExpr *alignofExpr ) {
468 // use GCC extension to avoid bumping std to C11
469 output << "__alignof__(";
470 if ( alignofExpr->get_isType() ) {
471 output << genType( alignofExpr->get_type(), "" );
472 } else {
473 alignofExpr->get_expr()->accept( *this );
474 } // if
475 output << ")";
476 }
477
478 void CodeGenerator::visit( UntypedOffsetofExpr *offsetofExpr ) {
479 assert( false );
480 }
481
482 void CodeGenerator::visit( OffsetofExpr *offsetofExpr ) {
483 // use GCC builtin
484 output << "__builtin_offsetof(";
485 output << genType( offsetofExpr->get_type(), "" );
486 output << ", " << mangleName( offsetofExpr->get_member() );
487 output << ")";
488 }
489
490 void CodeGenerator::visit( LogicalExpr *logicalExpr ) {
491 output << "(";
492 logicalExpr->get_arg1()->accept( *this );
493 if ( logicalExpr->get_isAnd() ) {
494 output << " && ";
495 } else {
496 output << " || ";
497 } // if
498 logicalExpr->get_arg2()->accept( *this );
499 output << ")";
500 }
501
502 void CodeGenerator::visit( ConditionalExpr *conditionalExpr ) {
503 output << "(";
504 conditionalExpr->get_arg1()->accept( *this );
505 output << " ? ";
506 conditionalExpr->get_arg2()->accept( *this );
507 output << " : ";
508 conditionalExpr->get_arg3()->accept( *this );
509 output << ")";
510 }
511
512 void CodeGenerator::visit( CommaExpr *commaExpr ) {
513 output << "(";
514 commaExpr->get_arg1()->accept( *this );
515 output << " , ";
516 commaExpr->get_arg2()->accept( *this );
517 output << ")";
518 }
519
520 void CodeGenerator::visit( TupleExpr *tupleExpr ) {}
521
522 void CodeGenerator::visit( TypeExpr *typeExpr ) {}
523
524 void CodeGenerator::visit( AsmExpr *asmExpr ) {
525 if ( asmExpr->get_inout() ) {
526 output << "[ ";
527 asmExpr->get_inout()->accept( *this );
528 output << " ] ";
529 } // if
530 asmExpr->get_constraint()->accept( *this );
531 output << " ( ";
532 asmExpr->get_operand()->accept( *this );
533 output << " )";
534 }
535
536 //*** Statements
537 void CodeGenerator::visit( CompoundStmt *compoundStmt ) {
538 std::list<Statement*> ks = compoundStmt->get_kids();
539 output << "{" << endl;
540
541 cur_indent += CodeGenerator::tabsize;
542
543 for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) {
544 output << indent << printLabels( (*i)->get_labels() );
545 (*i)->accept( *this );
546
547 output << endl;
548 if ( wantSpacing( *i ) ) {
549 output << endl;
550 }
551 }
552 cur_indent -= CodeGenerator::tabsize;
553
554 output << indent << "}";
555 }
556
557 void CodeGenerator::visit( ExprStmt *exprStmt ) {
558 // I don't see why this check is necessary.
559 // If this starts to cause problems then put it back in,
560 // with an explanation
561 assert( exprStmt );
562
563 // if ( exprStmt != 0 ) {
564 exprStmt->get_expr()->accept( *this );
565 output << ";" ;
566 // } // if
567 }
568
569 void CodeGenerator::visit( AsmStmt *asmStmt ) {
570 output << "asm ";
571 if ( asmStmt->get_voltile() ) output << "volatile ";
572 if ( ! asmStmt->get_gotolabels().empty() ) output << "goto ";
573 output << "( ";
574 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
575 output << " : ";
576 genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() );
577 output << " : ";
578 genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() );
579 output << " : ";
580 genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() );
581 if ( ! asmStmt->get_gotolabels().empty() ) {
582 output << " : ";
583 for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) {
584 output << *begin++;
585 if ( begin == asmStmt->get_gotolabels().end() ) break;
586 output << ", ";
587 } // for
588 } // if
589 output << " );" ;
590 }
591
592 void CodeGenerator::visit( IfStmt *ifStmt ) {
593 output << "if ( ";
594 ifStmt->get_condition()->accept( *this );
595 output << " ) ";
596
597 ifStmt->get_thenPart()->accept( *this );
598
599 if ( ifStmt->get_elsePart() != 0) {
600 output << " else ";
601 ifStmt->get_elsePart()->accept( *this );
602 } // if
603 }
604
605 void CodeGenerator::visit( SwitchStmt *switchStmt ) {
606 output << "switch ( " ;
607 switchStmt->get_condition()->accept( *this );
608 output << " ) ";
609
610 output << "{" << std::endl;
611 cur_indent += CodeGenerator::tabsize;
612
613 acceptAll( switchStmt->get_branches(), *this );
614
615 cur_indent -= CodeGenerator::tabsize;
616
617 output << indent << "}";
618 }
619
620 void CodeGenerator::visit( CaseStmt *caseStmt ) {
621 output << indent;
622 if ( caseStmt->isDefault()) {
623 output << "default";
624 } else {
625 output << "case ";
626 caseStmt->get_condition()->accept( *this );
627 } // if
628 output << ":\n";
629
630 std::list<Statement *> sts = caseStmt->get_statements();
631
632 cur_indent += CodeGenerator::tabsize;
633 for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) {
634 output << indent << printLabels( (*i)->get_labels() ) ;
635 (*i)->accept( *this );
636 output << endl;
637 }
638 cur_indent -= CodeGenerator::tabsize;
639 }
640
641 void CodeGenerator::visit( BranchStmt *branchStmt ) {
642 switch ( branchStmt->get_type()) {
643 case BranchStmt::Goto:
644 if ( ! branchStmt->get_target().empty() )
645 output << "goto " << branchStmt->get_target();
646 else {
647 if ( branchStmt->get_computedTarget() != 0 ) {
648 output << "goto *";
649 branchStmt->get_computedTarget()->accept( *this );
650 } // if
651 } // if
652 break;
653 case BranchStmt::Break:
654 output << "break";
655 break;
656 case BranchStmt::Continue:
657 output << "continue";
658 break;
659 }
660 output << ";";
661 }
662
663
664 void CodeGenerator::visit( ReturnStmt *returnStmt ) {
665 output << "return ";
666
667 // xxx -- check for null expression;
668 if ( returnStmt->get_expr() ) {
669 returnStmt->get_expr()->accept( *this );
670 } // if
671 output << ";";
672 }
673
674 void CodeGenerator::visit( WhileStmt *whileStmt ) {
675 if ( whileStmt->get_isDoWhile() )
676 output << "do" ;
677 else {
678 output << "while (" ;
679 whileStmt->get_condition()->accept( *this );
680 output << ")";
681 } // if
682 output << " ";
683
684 output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() );
685 whileStmt->get_body()->accept( *this );
686
687 output << indent;
688
689 if ( whileStmt->get_isDoWhile() ) {
690 output << " while (" ;
691 whileStmt->get_condition()->accept( *this );
692 output << ");";
693 } // if
694 }
695
696 void CodeGenerator::visit( ForStmt *forStmt ) {
697 // initialization is always hoisted, so don't
698 // bother doing anything with that
699 output << "for (;";
700
701 if ( forStmt->get_condition() != 0 )
702 forStmt->get_condition()->accept( *this );
703 output << ";";
704
705 if ( forStmt->get_increment() != 0 )
706 forStmt->get_increment()->accept( *this );
707 output << ") ";
708
709 if ( forStmt->get_body() != 0 ) {
710 output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() );
711 forStmt->get_body()->accept( *this );
712 } // if
713 }
714
715 void CodeGenerator::visit( NullStmt *nullStmt ) {
716 //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() );
717 output << "/* null statement */ ;";
718 }
719
720 void CodeGenerator::visit( DeclStmt *declStmt ) {
721 declStmt->get_decl()->accept( *this );
722
723 if ( doSemicolon( declStmt->get_decl() ) ) {
724 output << ";";
725 } // if
726 }
727
728 std::string CodeGenerator::printLabels( std::list< Label > &l ) {
729 std::string str( "" );
730 l.unique(); // assumes a sorted list. Why not use set?
731
732 for ( std::list< Label >::iterator i = l.begin(); i != l.end(); i++ )
733 str += *i + ": ";
734
735 return str;
736 }
737
738 void CodeGenerator::handleStorageClass( Declaration *decl ) {
739 switch ( decl->get_storageClass() ) {
740 case DeclarationNode::Extern:
741 output << "extern ";
742 break;
743 case DeclarationNode::Static:
744 output << "static ";
745 break;
746 case DeclarationNode::Auto:
747 // silently drop storage class
748 break;
749 case DeclarationNode::Register:
750 output << "register ";
751 break;
752 case DeclarationNode::Inline:
753 output << "inline ";
754 break;
755 case DeclarationNode::Fortran:
756 output << "fortran ";
757 break;
758 case DeclarationNode::Noreturn:
759 output << "_Noreturn ";
760 break;
761 case DeclarationNode::Threadlocal:
762 output << "_Thread_local ";
763 break;
764 case DeclarationNode::NoStorageClass:
765 break;
766 } // switch
767 }
768} // namespace CodeGen
769
770// Local Variables: //
771// tab-width: 4 //
772// mode: c++ //
773// compile-command: "make install" //
774// End: //
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