Context Navigation

source: src/CodeGen/CodeGenerator.cc @ 37024fd

ADTaaron-thesisarm-ehast-experimentalcleanup-dtorsctordeferred_resndemanglerenumforall-pointer-decaygc_noraiijacob/cs343-translationjenkins-sandboxmemorynew-astnew-ast-unique-exprnew-envno_listpersistent-indexerpthread-emulationqualifiedEnumresolv-newwith_gc

Last change on this file since 37024fd was 37024fd, checked in by Rob Schluntz <rschlunt@…>, 8 years ago
cleanup global init code, don't need to disambiguate with libcfa prefix
Property mode set to `100644`
File size: 21.0 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	// 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 : Fri May 06 14:57:16 2016
13	// Update Count : 243
14	//
15
16	#include <algorithm>
17	#include <iostream>
18	#include <cassert>
19	#include <list>
20
21	#include "Parser/ParseNode.h"
22
23	#include "SynTree/Declaration.h"
24	#include "SynTree/Expression.h"
25	#include "SynTree/Initializer.h"
26	#include "SynTree/Statement.h"
27	#include "SynTree/Type.h"
28
29	#include "Common/utility.h"
30	#include "Common/UnimplementedError.h"
31
32	#include "CodeGenerator.h"
33	#include "OperatorTable.h"
34	#include "GenType.h"
35
36	using namespace std;
37
38	namespace CodeGen {
39	int CodeGenerator::tabsize = 4;
40
41	// the kinds of statements that would ideally be followed by whitespace
42	bool wantSpacing( Statement * stmt) {
43	return dynamic_cast< IfStmt * >( stmt ) \|\| dynamic_cast< CompoundStmt * >( stmt ) \|\|
44	dynamic_cast< WhileStmt * >( stmt ) \|\| dynamic_cast< ForStmt * > ( stmt ) \|\| dynamic_cast< SwitchStmt *>( stmt );
45	}
46
47	ostream & CodeGenerator::Indenter::operator()( ostream & output ) {
48	return output << string( cg.cur_indent, ' ' );
49	}
50
51	ostream & operator<<( ostream & output, CodeGenerator::Indenter &indent ) {
52	return indent( output );
53	}
54
55	CodeGenerator::CodeGenerator( std::ostream &os ) : indent( *this), cur_indent( 0 ), insideFunction( false ), output( os ) { }
56
57	CodeGenerator::CodeGenerator( std::ostream &os, std::string init, int indentation, bool infunp )
58	: indent( *this), cur_indent( indentation ), insideFunction( infunp ), output( os ) {
59	//output << std::string( init );
60	}
61
62	CodeGenerator::CodeGenerator( std::ostream &os, char *init, int indentation, bool infunp )
63	: indent( *this ), cur_indent( indentation ), insideFunction( infunp ), output( os ) {
64	//output << std::string( init );
65	}
66
67	string mangleName( DeclarationWithType *decl ) {
68	if ( decl->get_mangleName() != "" ) {
69	return decl->get_mangleName();
70	} else {
71	return decl->get_name();
72	} // if
73	}
74
75	//*** Declarations
76	void CodeGenerator::visit( FunctionDecl *functionDecl ) {
77	// generalize this
78	switch ( functionDecl->get_attribute() ) {
79	case FunctionDecl::Constructor:
80	output << "__attribute__ ((constructor)) ";
81	break;
82	case FunctionDecl::Destructor:
83	output << "__attribute__ ((destructor)) ";
84	break;
85	default:
86	break;
87	}
88	handleStorageClass( functionDecl );
89	if ( functionDecl->get_isInline() ) {
90	output << "inline ";
91	} // if
92	if ( functionDecl->get_isNoreturn() ) {
93	output << "_Noreturn ";
94	} // if
95	output << genType( functionDecl->get_functionType(), mangleName( functionDecl ) );
96
97	// how to get this to the Functype?
98	std::list< Declaration * > olds = functionDecl->get_oldDecls();
99	if ( ! olds.empty() ) {
100	output << " /* function has old declaration */";
101	} // if
102
103	// acceptAll( functionDecl->get_oldDecls(), *this );
104	if ( functionDecl->get_statements() ) {
105	functionDecl->get_statements()->accept( *this );
106	} // if
107	}
108
109	void CodeGenerator::visit( ObjectDecl *objectDecl ) {
110	handleStorageClass( objectDecl );
111	output << genType( objectDecl->get_type(), mangleName( objectDecl ) );
112
113	if ( objectDecl->get_init() ) {
114	output << " = ";
115	objectDecl->get_init()->accept( *this );
116	} // if
117	if ( objectDecl->get_bitfieldWidth() ) {
118	output << ":";
119	objectDecl->get_bitfieldWidth()->accept( *this );
120	} // if
121	}
122
123	void CodeGenerator::handleAggregate( AggregateDecl *aggDecl ) {
124	if ( aggDecl->get_name() != "" )
125	output << aggDecl->get_name();
126
127	std::list< Declaration * > &memb = aggDecl->get_members();
128
129	if ( ! memb.empty() ) {
130	output << " {" << endl;
131
132	cur_indent += CodeGenerator::tabsize;
133	for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) {
134	output << indent;
135	(i)->accept( this );
136	output << ";" << endl;
137	}
138
139	cur_indent -= CodeGenerator::tabsize;
140
141	output << indent << "}";
142	} // if
143	}
144
145	void CodeGenerator::visit( StructDecl *structDecl ) {
146	output << "struct ";
147	handleAggregate( structDecl );
148	}
149
150	void CodeGenerator::visit( UnionDecl *aggregateDecl ) {
151	output << "union ";
152	handleAggregate( aggregateDecl );
153	}
154
155	void CodeGenerator::visit( EnumDecl *aggDecl ) {
156	output << "enum ";
157
158	if ( aggDecl->get_name() != "" )
159	output << aggDecl->get_name();
160
161	std::list< Declaration* > &memb = aggDecl->get_members();
162
163	if ( ! memb.empty() ) {
164	output << " {" << endl;
165
166	cur_indent += CodeGenerator::tabsize;
167	for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) {
168	ObjectDecl obj = dynamic_cast< ObjectDecl >( *i );
169	assert( obj );
170	output << indent << mangleName( obj );
171	if ( obj->get_init() ) {
172	output << " = ";
173	obj->get_init()->accept( *this );
174	} // if
175	output << "," << endl;
176	} // for
177
178	cur_indent -= CodeGenerator::tabsize;
179
180	output << indent << "}";
181	} // if
182	}
183
184	void CodeGenerator::visit( TraitDecl *aggregateDecl ) {}
185
186	void CodeGenerator::visit( TypedefDecl *typeDecl ) {
187	output << "typedef ";
188	output << genType( typeDecl->get_base(), typeDecl->get_name() );
189	}
190
191	void CodeGenerator::visit( TypeDecl *typeDecl ) {
192	// really, we should mutate this into something that isn't a TypeDecl but that requires large-scale changes,
193	// still to be done
194	output << "extern unsigned long " << typeDecl->get_name();
195	if ( typeDecl->get_base() ) {
196	output << " = sizeof( " << genType( typeDecl->get_base(), "" ) << " )";
197	} // if
198	}
199
200	void CodeGenerator::printDesignators( std::list< Expression * > & designators ) {
201	typedef std::list< Expression * > DesignatorList;
202	if ( designators.size() == 0 ) return;
203	for ( DesignatorList::iterator iter = designators.begin(); iter != designators.end(); ++iter ) {
204	if ( dynamic_cast< NameExpr * >( *iter ) ) {
205	// if expression is a name, then initializing aggregate member
206	output << ".";
207	(iter)->accept( this );
208	} else {
209	// if not a simple name, it has to be a constant expression, i.e. an array designator
210	output << "[";
211	(iter)->accept( this );
212	output << "]";
213	}
214	}
215	output << " = ";
216	}
217
218	void CodeGenerator::visit( SingleInit *init ) {
219	printDesignators( init->get_designators() );
220	init->get_value()->accept( *this );
221	}
222
223	void CodeGenerator::visit( ListInit *init ) {
224	printDesignators( init->get_designators() );
225	output << "{ ";
226	genCommaList( init->begin_initializers(), init->end_initializers() );
227	output << " }";
228	}
229
230	void CodeGenerator::visit( Constant *constant ) {
231	output << constant->get_value() ;
232	}
233
234	//*** Expressions
235	void CodeGenerator::visit( ApplicationExpr *applicationExpr ) {
236	if ( VariableExpr varExpr = dynamic_cast< VariableExpr >( applicationExpr->get_function() ) ) {
237	OperatorInfo opInfo;
238	if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( varExpr->get_var()->get_name(), opInfo ) ) {
239	std::list< Expression* >::iterator arg = applicationExpr->get_args().begin();
240	switch ( opInfo.type ) {
241	case OT_PREFIXASSIGN:
242	case OT_POSTFIXASSIGN:
243	case OT_INFIXASSIGN:
244	{
245	assert( arg != applicationExpr->get_args().end() );
246	if ( AddressExpr addrExpr = dynamic_cast< AddressExpr >( *arg ) ) {
247
248	*arg = addrExpr->get_arg();
249	} else {
250	UntypedExpr newExpr = new UntypedExpr( new NameExpr( "?" ) );
251	newExpr->get_args().push_back( *arg );
252	*arg = newExpr;
253	} // if
254	break;
255	}
256
257	default:
258	// do nothing
259	;
260	}
261
262	switch ( opInfo.type ) {
263	case OT_INDEX:
264	assert( applicationExpr->get_args().size() == 2 );
265	(arg++)->accept( this );
266	output << "[";
267	(arg)->accept( this );
268	output << "]";
269	break;
270
271	case OT_CALL:
272	// there are no intrinsic definitions of the function call operator
273	assert( false );
274	break;
275
276	case OT_PREFIX:
277	case OT_PREFIXASSIGN:
278	assert( applicationExpr->get_args().size() == 1 );
279	output << "(";
280	output << opInfo.symbol;
281	(arg)->accept( this );
282	output << ")";
283	break;
284
285	case OT_POSTFIX:
286	case OT_POSTFIXASSIGN:
287	assert( applicationExpr->get_args().size() == 1 );
288	(arg)->accept( this );
289	output << opInfo.symbol;
290	break;
291
292	case OT_INFIX:
293	case OT_INFIXASSIGN:
294	assert( applicationExpr->get_args().size() == 2 );
295	output << "(";
296	(arg++)->accept( this );
297	output << opInfo.symbol;
298	(arg)->accept( this );
299	output << ")";
300	break;
301
302	case OT_CONSTANT:
303	case OT_LABELADDRESS:
304	// there are no intrinsic definitions of 0/1 or label addresses as functions
305	assert( false );
306	}
307	} else {
308	varExpr->accept( *this );
309	output << "(";
310	genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
311	output << ")";
312	} // if
313	} else {
314	applicationExpr->get_function()->accept( *this );
315	output << "(";
316	genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
317	output << ")";
318	} // if
319	}
320
321	void CodeGenerator::visit( UntypedExpr *untypedExpr ) {
322	if ( NameExpr nameExpr = dynamic_cast< NameExpr >( untypedExpr->get_function() ) ) {
323	OperatorInfo opInfo;
324	if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
325	std::list< Expression* >::iterator arg = untypedExpr->get_args().begin();
326	switch ( opInfo.type ) {
327	case OT_INDEX:
328	assert( untypedExpr->get_args().size() == 2 );
329	(arg++)->accept( this );
330	output << "[";
331	(arg)->accept( this );
332	output << "]";
333	break;
334
335	case OT_CALL:
336	assert( false );
337	break;
338
339	case OT_PREFIX:
340	case OT_PREFIXASSIGN:
341	case OT_LABELADDRESS:
342	assert( untypedExpr->get_args().size() == 1 );
343	output << "(";
344	output << opInfo.symbol;
345	(arg)->accept( this );
346	output << ")";
347	break;
348
349	case OT_POSTFIX:
350	case OT_POSTFIXASSIGN:
351	assert( untypedExpr->get_args().size() == 1 );
352	(arg)->accept( this );
353	output << opInfo.symbol;
354	break;
355
356	case OT_INFIX:
357	case OT_INFIXASSIGN:
358	assert( untypedExpr->get_args().size() == 2 );
359	output << "(";
360	(arg++)->accept( this );
361	output << opInfo.symbol;
362	(arg)->accept( this );
363	output << ")";
364	break;
365
366	case OT_CONSTANT:
367	// there are no intrinsic definitions of 0 or 1 as functions
368	assert( false );
369	}
370	} else {
371	nameExpr->accept( *this );
372	output << "(";
373	genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
374	output << ")";
375	} // if
376	} else {
377	untypedExpr->get_function()->accept( *this );
378	output << "(";
379	genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
380	output << ")";
381	} // if
382	}
383
384	void CodeGenerator::visit( NameExpr *nameExpr ) {
385	OperatorInfo opInfo;
386	if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
387	assert( opInfo.type == OT_CONSTANT );
388	output << opInfo.symbol;
389	} else {
390	output << nameExpr->get_name();
391	} // if
392	}
393
394	void CodeGenerator::visit( AddressExpr *addressExpr ) {
395	output << "(&";
396	// this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address
397	if ( VariableExpr variableExpr = dynamic_cast< VariableExpr >( addressExpr->get_arg() ) ) {
398	output << mangleName( variableExpr->get_var() );
399	} else {
400	addressExpr->get_arg()->accept( *this );
401	} // if
402	output << ")";
403	}
404
405	void CodeGenerator::visit( CastExpr *castExpr ) {
406	output << "(";
407	if ( castExpr->get_results().empty() ) {
408	output << "(void)" ;
409	} else if ( ! castExpr->get_results().front()->get_isLvalue() ) {
410	// at least one result type of cast, but not an lvalue
411	output << "(";
412	output << genType( castExpr->get_results().front(), "" );
413	output << ")";
414	} else {
415	// otherwise, the cast is to an lvalue type, so the cast
416	// should be dropped, since the result of a cast is
417	// never an lvalue in C
418	}
419	castExpr->get_arg()->accept( *this );
420	output << ")";
421	}
422
423	void CodeGenerator::visit( UntypedMemberExpr *memberExpr ) {
424	assert( false );
425	}
426
427	void CodeGenerator::visit( MemberExpr *memberExpr ) {
428	memberExpr->get_aggregate()->accept( *this );
429	output << "." << mangleName( memberExpr->get_member() );
430	}
431
432	void CodeGenerator::visit( VariableExpr *variableExpr ) {
433	OperatorInfo opInfo;
434	if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) {
435	output << opInfo.symbol;
436	} else {
437	output << mangleName( variableExpr->get_var() );
438	} // if
439	}
440
441	void CodeGenerator::visit( ConstantExpr *constantExpr ) {
442	assert( constantExpr->get_constant() );
443	constantExpr->get_constant()->accept( *this );
444	}
445
446	void CodeGenerator::visit( SizeofExpr *sizeofExpr ) {
447	output << "sizeof(";
448	if ( sizeofExpr->get_isType() ) {
449	output << genType( sizeofExpr->get_type(), "" );
450	} else {
451	sizeofExpr->get_expr()->accept( *this );
452	} // if
453	output << ")";
454	}
455
456	void CodeGenerator::visit( AlignofExpr *alignofExpr ) {
457	// use GCC extension to avoid bumping std to C11
458	output << "__alignof__(";
459	if ( alignofExpr->get_isType() ) {
460	output << genType( alignofExpr->get_type(), "" );
461	} else {
462	alignofExpr->get_expr()->accept( *this );
463	} // if
464	output << ")";
465	}
466
467	void CodeGenerator::visit( UntypedOffsetofExpr *offsetofExpr ) {
468	assert( false && "UntypedOffsetofExpr should not reach code generation" );
469	}
470
471	void CodeGenerator::visit( OffsetofExpr *offsetofExpr ) {
472	// use GCC builtin
473	output << "__builtin_offsetof(";
474	output << genType( offsetofExpr->get_type(), "" );
475	output << ", " << mangleName( offsetofExpr->get_member() );
476	output << ")";
477	}
478
479	void CodeGenerator::visit( OffsetPackExpr *offsetPackExpr ) {
480	assert( false && "OffsetPackExpr should not reach code generation" );
481	}
482
483	void CodeGenerator::visit( LogicalExpr *logicalExpr ) {
484	output << "(";
485	logicalExpr->get_arg1()->accept( *this );
486	if ( logicalExpr->get_isAnd() ) {
487	output << " && ";
488	} else {
489	output << " \|\| ";
490	} // if
491	logicalExpr->get_arg2()->accept( *this );
492	output << ")";
493	}
494
495	void CodeGenerator::visit( ConditionalExpr *conditionalExpr ) {
496	output << "(";
497	conditionalExpr->get_arg1()->accept( *this );
498	output << " ? ";
499	conditionalExpr->get_arg2()->accept( *this );
500	output << " : ";
501	conditionalExpr->get_arg3()->accept( *this );
502	output << ")";
503	}
504
505	void CodeGenerator::visit( CommaExpr *commaExpr ) {
506	output << "(";
507	commaExpr->get_arg1()->accept( *this );
508	output << " , ";
509	commaExpr->get_arg2()->accept( *this );
510	output << ")";
511	}
512
513	void CodeGenerator::visit( TupleExpr *tupleExpr ) {}
514
515	void CodeGenerator::visit( TypeExpr *typeExpr ) {}
516
517	void CodeGenerator::visit( AsmExpr *asmExpr ) {
518	if ( asmExpr->get_inout() ) {
519	output << "[ ";
520	asmExpr->get_inout()->accept( *this );
521	output << " ] ";
522	} // if
523	asmExpr->get_constraint()->accept( *this );
524	output << " ( ";
525	asmExpr->get_operand()->accept( *this );
526	output << " )";
527	}
528
529	//*** Statements
530	void CodeGenerator::visit( CompoundStmt *compoundStmt ) {
531	std::list<Statement*> ks = compoundStmt->get_kids();
532	output << "{" << endl;
533
534	cur_indent += CodeGenerator::tabsize;
535
536	for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) {
537	output << indent << printLabels( (*i)->get_labels() );
538	(i)->accept( this );
539
540	output << endl;
541	if ( wantSpacing( *i ) ) {
542	output << endl;
543	}
544	}
545	cur_indent -= CodeGenerator::tabsize;
546
547	output << indent << "}";
548	}
549
550	void CodeGenerator::visit( ExprStmt *exprStmt ) {
551	// I don't see why this check is necessary.
552	// If this starts to cause problems then put it back in,
553	// with an explanation
554	assert( exprStmt );
555
556	// if ( exprStmt != 0 ) {
557	exprStmt->get_expr()->accept( *this );
558	output << ";" ;
559	// } // if
560	}
561
562	void CodeGenerator::visit( AsmStmt *asmStmt ) {
563	output << "asm ";
564	if ( asmStmt->get_voltile() ) output << "volatile ";
565	if ( ! asmStmt->get_gotolabels().empty() ) output << "goto ";
566	output << "( ";
567	if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
568	output << " : ";
569	genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() );
570	output << " : ";
571	genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() );
572	output << " : ";
573	genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() );
574	if ( ! asmStmt->get_gotolabels().empty() ) {
575	output << " : ";
576	for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) {
577	output << *begin++;
578	if ( begin == asmStmt->get_gotolabels().end() ) break;
579	output << ", ";
580	} // for
581	} // if
582	output << " );" ;
583	}
584
585	void CodeGenerator::visit( IfStmt *ifStmt ) {
586	output << "if ( ";
587	ifStmt->get_condition()->accept( *this );
588	output << " ) ";
589
590	ifStmt->get_thenPart()->accept( *this );
591
592	if ( ifStmt->get_elsePart() != 0) {
593	output << " else ";
594	ifStmt->get_elsePart()->accept( *this );
595	} // if
596	}
597
598	void CodeGenerator::visit( SwitchStmt *switchStmt ) {
599	output << "switch ( " ;
600	switchStmt->get_condition()->accept( *this );
601	output << " ) ";
602
603	output << "{" << std::endl;
604	cur_indent += CodeGenerator::tabsize;
605
606	acceptAll( switchStmt->get_branches(), *this );
607
608	cur_indent -= CodeGenerator::tabsize;
609
610	output << indent << "}";
611	}
612
613	void CodeGenerator::visit( CaseStmt *caseStmt ) {
614	output << indent;
615	if ( caseStmt->isDefault()) {
616	output << "default";
617	} else {
618	output << "case ";
619	caseStmt->get_condition()->accept( *this );
620	} // if
621	output << ":\n";
622
623	std::list<Statement *> sts = caseStmt->get_statements();
624
625	cur_indent += CodeGenerator::tabsize;
626	for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) {
627	output << indent << printLabels( (*i)->get_labels() ) ;
628	(i)->accept( this );
629	output << endl;
630	}
631	cur_indent -= CodeGenerator::tabsize;
632	}
633
634	void CodeGenerator::visit( BranchStmt *branchStmt ) {
635	switch ( branchStmt->get_type()) {
636	case BranchStmt::Goto:
637	if ( ! branchStmt->get_target().empty() )
638	output << "goto " << branchStmt->get_target();
639	else {
640	if ( branchStmt->get_computedTarget() != 0 ) {
641	output << "goto *";
642	branchStmt->get_computedTarget()->accept( *this );
643	} // if
644	} // if
645	break;
646	case BranchStmt::Break:
647	output << "break";
648	break;
649	case BranchStmt::Continue:
650	output << "continue";
651	break;
652	}
653	output << ";";
654	}
655
656
657	void CodeGenerator::visit( ReturnStmt *returnStmt ) {
658	output << "return ";
659
660	// xxx -- check for null expression;
661	if ( returnStmt->get_expr() ) {
662	returnStmt->get_expr()->accept( *this );
663	} // if
664	output << ";";
665	}
666
667	void CodeGenerator::visit( WhileStmt *whileStmt ) {
668	if ( whileStmt->get_isDoWhile() )
669	output << "do" ;
670	else {
671	output << "while (" ;
672	whileStmt->get_condition()->accept( *this );
673	output << ")";
674	} // if
675	output << " ";
676
677	output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() );
678	whileStmt->get_body()->accept( *this );
679
680	output << indent;
681
682	if ( whileStmt->get_isDoWhile() ) {
683	output << " while (" ;
684	whileStmt->get_condition()->accept( *this );
685	output << ");";
686	} // if
687	}
688
689	void CodeGenerator::visit( ForStmt *forStmt ) {
690	// initialization is always hoisted, so don't
691	// bother doing anything with that
692	output << "for (;";
693
694	if ( forStmt->get_condition() != 0 )
695	forStmt->get_condition()->accept( *this );
696	output << ";";
697
698	if ( forStmt->get_increment() != 0 )
699	forStmt->get_increment()->accept( *this );
700	output << ") ";
701
702	if ( forStmt->get_body() != 0 ) {
703	output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() );
704	forStmt->get_body()->accept( *this );
705	} // if
706	}
707
708	void CodeGenerator::visit( NullStmt *nullStmt ) {
709	//output << indent << CodeGenerator::printLabels( nullStmt->get_labels() );
710	output << "/* null statement */ ;";
711	}
712
713	void CodeGenerator::visit( DeclStmt *declStmt ) {
714	declStmt->get_decl()->accept( *this );
715
716	if ( doSemicolon( declStmt->get_decl() ) ) {
717	output << ";";
718	} // if
719	}
720
721	std::string CodeGenerator::printLabels( std::list< Label > &l ) {
722	std::string str( "" );
723	l.unique(); // assumes a sorted list. Why not use set?
724
725	for ( std::list< Label >::iterator i = l.begin(); i != l.end(); i++ )
726	str += *i + ": ";
727
728	return str;
729	}
730
731	void CodeGenerator::handleStorageClass( Declaration *decl ) {
732	switch ( decl->get_storageClass() ) {
733	case DeclarationNode::Extern:
734	output << "extern ";
735	break;
736	case DeclarationNode::Static:
737	output << "static ";
738	break;
739	case DeclarationNode::Auto:
740	// silently drop storage class
741	break;
742	case DeclarationNode::Register:
743	output << "register ";
744	break;
745	case DeclarationNode::Inline:
746	output << "inline ";
747	break;
748	case DeclarationNode::Fortran:
749	output << "fortran ";
750	break;
751	case DeclarationNode::Noreturn:
752	output << "_Noreturn ";
753	break;
754	case DeclarationNode::Threadlocal:
755	output << "_Thread_local ";
756	break;
757	case DeclarationNode::NoStorageClass:
758	break;
759	} // switch
760	}
761	} // namespace CodeGen
762
763	// Local Variables: //
764	// tab-width: 4 //
765	// mode: c++ //
766	// compile-command: "make install" //
767	// End: //

Note: See TracBrowser for help on using the repository browser.

Download in other formats: