source: src/CodeGen/CodeGenerator.cc@ dac0aa9

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 dac0aa9 was 5b40f30, checked in by Rob Schluntz <rschlunt@…>, 10 years ago

generate correct empty list initializer, ensure function return value is not incorrectly destructed before it is returned, do not add src parameter to autogenerated routines when they take a single argument
  • Property mode set to 100644
File size: 21.5 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// 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 if ( init->begin_initializers() == init->end_initializers() ) {
215 // illegal to leave initializer list empty for scalar initializers,
216 // but always legal to have 0
217 output << "0";
218 } else {
219 genCommaList( init->begin_initializers(), init->end_initializers() );
220 }
221 output << " }";
222 }
223
224 void CodeGenerator::visit( Constant *constant ) {
225 output << constant->get_value() ;
226 }
227
228 //*** Expressions
229 void CodeGenerator::visit( ApplicationExpr *applicationExpr ) {
230 if ( VariableExpr *varExpr = dynamic_cast< VariableExpr* >( applicationExpr->get_function() ) ) {
231 OperatorInfo opInfo;
232 if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( varExpr->get_var()->get_name(), opInfo ) ) {
233 std::list< Expression* >::iterator arg = applicationExpr->get_args().begin();
234 switch ( opInfo.type ) {
235 case OT_PREFIXASSIGN:
236 case OT_POSTFIXASSIGN:
237 case OT_INFIXASSIGN:
238 {
239 assert( arg != applicationExpr->get_args().end() );
240 if ( AddressExpr *addrExpr = dynamic_cast< AddressExpr * >( *arg ) ) {
241
242 *arg = addrExpr->get_arg();
243 } else {
244 UntypedExpr *newExpr = new UntypedExpr( new NameExpr( "*?" ) );
245 newExpr->get_args().push_back( *arg );
246 *arg = newExpr;
247 } // if
248 break;
249 }
250
251 default:
252 // do nothing
253 ;
254 }
255
256 switch ( opInfo.type ) {
257 case OT_INDEX:
258 assert( applicationExpr->get_args().size() == 2 );
259 (*arg++)->accept( *this );
260 output << "[";
261 (*arg)->accept( *this );
262 output << "]";
263 break;
264
265 case OT_CALL:
266 // there are no intrinsic definitions of the function call operator or constructors or destructors
267 assert( false );
268 break;
269
270 case OT_CTOR:
271 // it's just an optimization to disallow this, so for now let it through
272 // since it makes autogenerating constructors a lot easier
273 varExpr->accept( *this );
274 output << "(";
275 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
276 output << ")";
277
278 // intrinsic constructors should never be called directly - they should be transformed back into Initializer nodes
279 // assert(false);
280 break;
281
282 case OT_DTOR:
283 // intrinsic destructors do nothing - don't generate any code
284 output << " // " << dynamic_cast<VariableExpr*>(applicationExpr->get_function())->get_var()->get_name() << endl;
285 break;
286
287 case OT_PREFIX:
288 case OT_PREFIXASSIGN:
289 assert( applicationExpr->get_args().size() == 1 );
290 output << "(";
291 output << opInfo.symbol;
292 (*arg)->accept( *this );
293 output << ")";
294 break;
295
296 case OT_POSTFIX:
297 case OT_POSTFIXASSIGN:
298 assert( applicationExpr->get_args().size() == 1 );
299 (*arg)->accept( *this );
300 output << opInfo.symbol;
301 break;
302
303
304 case OT_INFIX:
305 case OT_INFIXASSIGN:
306 assert( applicationExpr->get_args().size() == 2 );
307 output << "(";
308 (*arg++)->accept( *this );
309 output << opInfo.symbol;
310 (*arg)->accept( *this );
311 output << ")";
312 break;
313
314 case OT_CONSTANT:
315 case OT_LABELADDRESS:
316 // there are no intrinsic definitions of 0/1 or label addresses as functions
317 assert( false );
318 }
319 } else {
320 varExpr->accept( *this );
321 output << "(";
322 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
323 output << ")";
324 } // if
325 } else {
326 applicationExpr->get_function()->accept( *this );
327 output << "(";
328 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
329 output << ")";
330 } // if
331 }
332
333 void CodeGenerator::visit( UntypedExpr *untypedExpr ) {
334 if ( NameExpr *nameExpr = dynamic_cast< NameExpr* >( untypedExpr->get_function() ) ) {
335 OperatorInfo opInfo;
336 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
337 std::list< Expression* >::iterator arg = untypedExpr->get_args().begin();
338 switch ( opInfo.type ) {
339 case OT_INDEX:
340 assert( untypedExpr->get_args().size() == 2 );
341 (*arg++)->accept( *this );
342 output << "[";
343 (*arg)->accept( *this );
344 output << "]";
345 break;
346
347 case OT_CALL:
348 assert( false );
349
350 case OT_CTOR:
351 case OT_DTOR:
352 // intrinsic constructors should never be called
353 // intrinsic destructors do nothing
354 break;
355
356 case OT_PREFIX:
357 case OT_PREFIXASSIGN:
358 case OT_LABELADDRESS:
359 assert( untypedExpr->get_args().size() == 1 );
360 output << "(";
361 output << opInfo.symbol;
362 (*arg)->accept( *this );
363 output << ")";
364 break;
365
366 case OT_POSTFIX:
367 case OT_POSTFIXASSIGN:
368 assert( untypedExpr->get_args().size() == 1 );
369 (*arg)->accept( *this );
370 output << opInfo.symbol;
371 break;
372
373 case OT_INFIX:
374 case OT_INFIXASSIGN:
375 assert( untypedExpr->get_args().size() == 2 );
376 output << "(";
377 (*arg++)->accept( *this );
378 output << opInfo.symbol;
379 (*arg)->accept( *this );
380 output << ")";
381 break;
382
383 case OT_CONSTANT:
384 // there are no intrinsic definitions of 0 or 1 as functions
385 assert( false );
386 }
387 } else {
388 nameExpr->accept( *this );
389 output << "(";
390 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
391 output << ")";
392 } // if
393 } else {
394 untypedExpr->get_function()->accept( *this );
395 output << "(";
396 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
397 output << ")";
398 } // if
399 }
400
401 void CodeGenerator::visit( NameExpr *nameExpr ) {
402 OperatorInfo opInfo;
403 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
404 assert( opInfo.type == OT_CONSTANT );
405 output << opInfo.symbol;
406 } else {
407 output << nameExpr->get_name();
408 } // if
409 }
410
411 void CodeGenerator::visit( AddressExpr *addressExpr ) {
412 output << "(&";
413 // this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address
414 if ( VariableExpr *variableExpr = dynamic_cast< VariableExpr* >( addressExpr->get_arg() ) ) {
415 output << mangleName( variableExpr->get_var() );
416 } else {
417 addressExpr->get_arg()->accept( *this );
418 } // if
419 output << ")";
420 }
421
422 void CodeGenerator::visit( CastExpr *castExpr ) {
423 output << "(";
424 if ( castExpr->get_results().empty() ) {
425 output << "(void)" ;
426 } else if ( ! castExpr->get_results().front()->get_isLvalue() ) {
427 // at least one result type of cast, but not an lvalue
428 output << "(";
429 output << genType( castExpr->get_results().front(), "" );
430 output << ")";
431 } else {
432 // otherwise, the cast is to an lvalue type, so the cast
433 // should be dropped, since the result of a cast is
434 // never an lvalue in C
435 }
436 castExpr->get_arg()->accept( *this );
437 output << ")";
438 }
439
440 void CodeGenerator::visit( UntypedMemberExpr *memberExpr ) {
441 assert( false );
442 }
443
444 void CodeGenerator::visit( MemberExpr *memberExpr ) {
445 memberExpr->get_aggregate()->accept( *this );
446 output << "." << mangleName( memberExpr->get_member() );
447 }
448
449 void CodeGenerator::visit( VariableExpr *variableExpr ) {
450 OperatorInfo opInfo;
451 if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) {
452 output << opInfo.symbol;
453 } else {
454 output << mangleName( variableExpr->get_var() );
455 } // if
456 }
457
458 void CodeGenerator::visit( ConstantExpr *constantExpr ) {
459 assert( constantExpr->get_constant() );
460 constantExpr->get_constant()->accept( *this );
461 }
462
463 void CodeGenerator::visit( SizeofExpr *sizeofExpr ) {
464 output << "sizeof(";
465 if ( sizeofExpr->get_isType() ) {
466 output << genType( sizeofExpr->get_type(), "" );
467 } else {
468 sizeofExpr->get_expr()->accept( *this );
469 } // if
470 output << ")";
471 }
472
473 void CodeGenerator::visit( AlignofExpr *alignofExpr ) {
474 // use GCC extension to avoid bumping std to C11
475 output << "__alignof__(";
476 if ( alignofExpr->get_isType() ) {
477 output << genType( alignofExpr->get_type(), "" );
478 } else {
479 alignofExpr->get_expr()->accept( *this );
480 } // if
481 output << ")";
482 }
483
484 void CodeGenerator::visit( UntypedOffsetofExpr *offsetofExpr ) {
485 assert( false );
486 }
487
488 void CodeGenerator::visit( OffsetofExpr *offsetofExpr ) {
489 // use GCC builtin
490 output << "__builtin_offsetof(";
491 output << genType( offsetofExpr->get_type(), "" );
492 output << ", " << mangleName( offsetofExpr->get_member() );
493 output << ")";
494 }
495
496 void CodeGenerator::visit( LogicalExpr *logicalExpr ) {
497 output << "(";
498 logicalExpr->get_arg1()->accept( *this );
499 if ( logicalExpr->get_isAnd() ) {
500 output << " && ";
501 } else {
502 output << " || ";
503 } // if
504 logicalExpr->get_arg2()->accept( *this );
505 output << ")";
506 }
507
508 void CodeGenerator::visit( ConditionalExpr *conditionalExpr ) {
509 output << "(";
510 conditionalExpr->get_arg1()->accept( *this );
511 output << " ? ";
512 conditionalExpr->get_arg2()->accept( *this );
513 output << " : ";
514 conditionalExpr->get_arg3()->accept( *this );
515 output << ")";
516 }
517
518 void CodeGenerator::visit( CommaExpr *commaExpr ) {
519 output << "(";
520 commaExpr->get_arg1()->accept( *this );
521 output << " , ";
522 commaExpr->get_arg2()->accept( *this );
523 output << ")";
524 }
525
526 void CodeGenerator::visit( TupleExpr *tupleExpr ) {}
527
528 void CodeGenerator::visit( TypeExpr *typeExpr ) {}
529
530 void CodeGenerator::visit( AsmExpr *asmExpr ) {
531 if ( asmExpr->get_inout() ) {
532 output << "[ ";
533 asmExpr->get_inout()->accept( *this );
534 output << " ] ";
535 } // if
536 asmExpr->get_constraint()->accept( *this );
537 output << " ( ";
538 asmExpr->get_operand()->accept( *this );
539 output << " )";
540 }
541
542 //*** Statements
543 void CodeGenerator::visit( CompoundStmt *compoundStmt ) {
544 std::list<Statement*> ks = compoundStmt->get_kids();
545 output << "{" << endl;
546
547 cur_indent += CodeGenerator::tabsize;
548
549 for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) {
550 output << indent << printLabels( (*i)->get_labels() );
551 (*i)->accept( *this );
552
553 output << endl;
554 if ( wantSpacing( *i ) ) {
555 output << endl;
556 }
557 }
558 cur_indent -= CodeGenerator::tabsize;
559
560 output << indent << "}";
561 }
562
563 void CodeGenerator::visit( ExprStmt *exprStmt ) {
564 // I don't see why this check is necessary.
565 // If this starts to cause problems then put it back in,
566 // with an explanation
567 assert( exprStmt );
568
569 // if ( exprStmt != 0 ) {
570 exprStmt->get_expr()->accept( *this );
571 output << ";" ;
572 // } // if
573 }
574
575 void CodeGenerator::visit( AsmStmt *asmStmt ) {
576 output << "asm ";
577 if ( asmStmt->get_voltile() ) output << "volatile ";
578 if ( ! asmStmt->get_gotolabels().empty() ) output << "goto ";
579 output << "( ";
580 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
581 output << " : ";
582 genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() );
583 output << " : ";
584 genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() );
585 output << " : ";
586 genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() );
587 if ( ! asmStmt->get_gotolabels().empty() ) {
588 output << " : ";
589 for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) {
590 output << *begin++;
591 if ( begin == asmStmt->get_gotolabels().end() ) break;
592 output << ", ";
593 } // for
594 } // if
595 output << " );" ;
596 }
597
598 void CodeGenerator::visit( IfStmt *ifStmt ) {
599 output << "if ( ";
600 ifStmt->get_condition()->accept( *this );
601 output << " ) ";
602
603 ifStmt->get_thenPart()->accept( *this );
604
605 if ( ifStmt->get_elsePart() != 0) {
606 output << " else ";
607 ifStmt->get_elsePart()->accept( *this );
608 } // if
609 }
610
611 void CodeGenerator::visit( SwitchStmt *switchStmt ) {
612 output << "switch ( " ;
613 switchStmt->get_condition()->accept( *this );
614 output << " ) ";
615
616 output << "{" << std::endl;
617 cur_indent += CodeGenerator::tabsize;
618
619 acceptAll( switchStmt->get_branches(), *this );
620
621 cur_indent -= CodeGenerator::tabsize;
622
623 output << indent << "}";
624 }
625
626 void CodeGenerator::visit( CaseStmt *caseStmt ) {
627 output << indent;
628 if ( caseStmt->isDefault()) {
629 output << "default";
630 } else {
631 output << "case ";
632 caseStmt->get_condition()->accept( *this );
633 } // if
634 output << ":\n";
635
636 std::list<Statement *> sts = caseStmt->get_statements();
637
638 cur_indent += CodeGenerator::tabsize;
639 for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) {
640 output << indent << printLabels( (*i)->get_labels() ) ;
641 (*i)->accept( *this );
642 output << endl;
643 }
644 cur_indent -= CodeGenerator::tabsize;
645 }
646
647 void CodeGenerator::visit( BranchStmt *branchStmt ) {
648 switch ( branchStmt->get_type()) {
649 case BranchStmt::Goto:
650 if ( ! branchStmt->get_target().empty() )
651 output << "goto " << branchStmt->get_target();
652 else {
653 if ( branchStmt->get_computedTarget() != 0 ) {
654 output << "goto *";
655 branchStmt->get_computedTarget()->accept( *this );
656 } // if
657 } // if
658 break;
659 case BranchStmt::Break:
660 output << "break";
661 break;
662 case BranchStmt::Continue:
663 output << "continue";
664 break;
665 }
666 output << ";";
667 }
668
669
670 void CodeGenerator::visit( ReturnStmt *returnStmt ) {
671 output << "return ";
672
673 // xxx -- check for null expression;
674 if ( returnStmt->get_expr() ) {
675 returnStmt->get_expr()->accept( *this );
676 } // if
677 output << ";";
678 }
679
680 void CodeGenerator::visit( WhileStmt *whileStmt ) {
681 if ( whileStmt->get_isDoWhile() )
682 output << "do" ;
683 else {
684 output << "while (" ;
685 whileStmt->get_condition()->accept( *this );
686 output << ")";
687 } // if
688 output << " ";
689
690 output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() );
691 whileStmt->get_body()->accept( *this );
692
693 output << indent;
694
695 if ( whileStmt->get_isDoWhile() ) {
696 output << " while (" ;
697 whileStmt->get_condition()->accept( *this );
698 output << ");";
699 } // if
700 }
701
702 void CodeGenerator::visit( ForStmt *forStmt ) {
703 // initialization is always hoisted, so don't
704 // bother doing anything with that
705 output << "for (;";
706
707 if ( forStmt->get_condition() != 0 )
708 forStmt->get_condition()->accept( *this );
709 output << ";";
710
711 if ( forStmt->get_increment() != 0 )
712 forStmt->get_increment()->accept( *this );
713 output << ") ";
714
715 if ( forStmt->get_body() != 0 ) {
716 output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() );
717 forStmt->get_body()->accept( *this );
718 } // if
719 }
720
721 void CodeGenerator::visit( NullStmt *nullStmt ) {
722 //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() );
723 output << "/* null statement */ ;";
724 }
725
726 void CodeGenerator::visit( DeclStmt *declStmt ) {
727 declStmt->get_decl()->accept( *this );
728
729 if ( doSemicolon( declStmt->get_decl() ) ) {
730 output << ";";
731 } // if
732 }
733
734 std::string CodeGenerator::printLabels( std::list< Label > &l ) {
735 std::string str( "" );
736 l.unique(); // assumes a sorted list. Why not use set?
737
738 for ( std::list< Label >::iterator i = l.begin(); i != l.end(); i++ )
739 str += *i + ": ";
740
741 return str;
742 }
743
744 void CodeGenerator::handleStorageClass( Declaration *decl ) {
745 switch ( decl->get_storageClass() ) {
746 case DeclarationNode::Extern:
747 output << "extern ";
748 break;
749 case DeclarationNode::Static:
750 output << "static ";
751 break;
752 case DeclarationNode::Auto:
753 // silently drop storage class
754 break;
755 case DeclarationNode::Register:
756 output << "register ";
757 break;
758 case DeclarationNode::Inline:
759 output << "inline ";
760 break;
761 case DeclarationNode::Fortran:
762 output << "fortran ";
763 break;
764 case DeclarationNode::Noreturn:
765 output << "_Noreturn ";
766 break;
767 case DeclarationNode::Threadlocal:
768 output << "_Thread_local ";
769 break;
770 case DeclarationNode::NoStorageClass:
771 break;
772 } // switch
773 }
774} // namespace CodeGen
775
776// Local Variables: //
777// tab-width: 4 //
778// mode: c++ //
779// compile-command: "make install" //
780// End: //
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