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CodeGenerator.cc @ a5a71d0

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 a5a71d0 was a5a71d0, checked in by Rob Schluntz <rschlunt@…>, 8 years ago

Merge branch 'fix-memory-error' into ctor

Conflicts:

src/CodeGen/CodeGenerator.cc
src/Makefile.in
src/Parser/DeclarationNode.cc
src/Parser/ParseNode.h
src/Parser/TypeData.cc
src/Parser/parser.cc
src/Parser/parser.yy
src/ResolvExpr/Resolver.cc
src/SymTab/Validate.cc
src/SynTree/Declaration.h
src/SynTree/Mutator.cc
src/SynTree/Mutator.h
src/SynTree/SynTree.h
src/SynTree/Visitor.cc
src/SynTree/Visitor.h
src/libcfa/prelude.cf

Property mode set to 100644

File size: 21.6 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 : Mon Apr 04 17:08:06 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/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	handleStorageClass( functionDecl );
78	if ( functionDecl->get_isInline() ) {
79	output << "inline ";
80	} // if
81	if ( functionDecl->get_isNoreturn() ) {
82	output << "_Noreturn ";
83	} // if
84	output << genType( functionDecl->get_functionType(), mangleName( functionDecl ) );
85
86	// how to get this to the Functype?
87	std::list< Declaration * > olds = functionDecl->get_oldDecls();
88	if ( ! olds.empty() ) {
89	output << " /* function has old declaration */";
90	} // if
91
92	// acceptAll( functionDecl->get_oldDecls(), *this );
93	if ( functionDecl->get_statements() ) {
94	functionDecl->get_statements()->accept( *this );
95	} // if
96	}
97
98	void CodeGenerator::visit( ObjectDecl *objectDecl ) {
99	handleStorageClass( objectDecl );
100	output << genType( objectDecl->get_type(), mangleName( objectDecl ) );
101
102	if ( objectDecl->get_init() ) {
103	output << " = ";
104	objectDecl->get_init()->accept( *this );
105	} // if
106	if ( objectDecl->get_bitfieldWidth() ) {
107	output << ":";
108	objectDecl->get_bitfieldWidth()->accept( *this );
109	} // if
110	}
111
112	void CodeGenerator::handleAggregate( AggregateDecl *aggDecl ) {
113	if ( aggDecl->get_name() != "" )
114	output << aggDecl->get_name();
115
116	std::list< Declaration * > &memb = aggDecl->get_members();
117
118	if ( ! memb.empty() ) {
119	output << " {" << endl;
120
121	cur_indent += CodeGenerator::tabsize;
122	for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) {
123	output << indent;
124	(i)->accept( this );
125	output << ";" << endl;
126	}
127
128	cur_indent -= CodeGenerator::tabsize;
129
130	output << indent << "}";
131	} // if
132	}
133
134	void CodeGenerator::visit( StructDecl *structDecl ) {
135	output << "struct ";
136	handleAggregate( structDecl );
137	}
138
139	void CodeGenerator::visit( UnionDecl *aggregateDecl ) {
140	output << "union ";
141	handleAggregate( aggregateDecl );
142	}
143
144	void CodeGenerator::visit( EnumDecl *aggDecl ) {
145	output << "enum ";
146
147	if ( aggDecl->get_name() != "" )
148	output << aggDecl->get_name();
149
150	std::list< Declaration* > &memb = aggDecl->get_members();
151
152	if ( ! memb.empty() ) {
153	output << " {" << endl;
154
155	cur_indent += CodeGenerator::tabsize;
156	for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) {
157	ObjectDecl obj = dynamic_cast< ObjectDecl >( *i );
158	assert( obj );
159	output << indent << mangleName( obj );
160	if ( obj->get_init() ) {
161	output << " = ";
162	obj->get_init()->accept( *this );
163	} // if
164	output << "," << endl;
165	} // for
166
167	cur_indent -= CodeGenerator::tabsize;
168
169	output << indent << "}";
170	} // if
171	}
172
173	void CodeGenerator::visit( TraitDecl *aggregateDecl ) {}
174
175	void CodeGenerator::visit( TypedefDecl *typeDecl ) {
176	output << "typedef ";
177	output << genType( typeDecl->get_base(), typeDecl->get_name() );
178	}
179
180	void CodeGenerator::visit( TypeDecl *typeDecl ) {
181	// really, we should mutate this into something that isn't a TypeDecl but that requires large-scale changes,
182	// still to be done
183	output << "extern unsigned long " << typeDecl->get_name();
184	if ( typeDecl->get_base() ) {
185	output << " = sizeof( " << genType( typeDecl->get_base(), "" ) << " )";
186	} // if
187	}
188
189	void CodeGenerator::printDesignators( std::list< Expression * > & designators ) {
190	typedef std::list< Expression * > DesignatorList;
191	if ( designators.size() == 0 ) return;
192	for ( DesignatorList::iterator iter = designators.begin(); iter != designators.end(); ++iter ) {
193	if ( dynamic_cast< NameExpr * >( *iter ) ) {
194	// if expression is a name, then initializing aggregate member
195	output << ".";
196	(iter)->accept( this );
197	} else {
198	// if not a simple name, it has to be a constant expression, i.e. an array designator
199	output << "[";
200	(iter)->accept( this );
201	output << "]";
202	}
203	}
204	output << " = ";
205	}
206
207	void CodeGenerator::visit( SingleInit *init ) {
208	printDesignators( init->get_designators() );
209	init->get_value()->accept( *this );
210	}
211
212	void CodeGenerator::visit( ListInit *init ) {
213	printDesignators( init->get_designators() );
214	output << "{ ";
215	if ( init->begin_initializers() == init->end_initializers() ) {
216	// illegal to leave initializer list empty for scalar initializers,
217	// but always legal to have 0
218	output << "0";
219	} else {
220	genCommaList( init->begin_initializers(), init->end_initializers() );
221	}
222	output << " }";
223	}
224
225	void CodeGenerator::visit( Constant *constant ) {
226	output << constant->get_value() ;
227	}
228
229	//*** Expressions
230	void CodeGenerator::visit( ApplicationExpr *applicationExpr ) {
231	if ( VariableExpr varExpr = dynamic_cast< VariableExpr >( applicationExpr->get_function() ) ) {
232	OperatorInfo opInfo;
233	if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( varExpr->get_var()->get_name(), opInfo ) ) {
234	std::list< Expression* >::iterator arg = applicationExpr->get_args().begin();
235	switch ( opInfo.type ) {
236	case OT_PREFIXASSIGN:
237	case OT_POSTFIXASSIGN:
238	case OT_INFIXASSIGN:
239	{
240	assert( arg != applicationExpr->get_args().end() );
241	if ( AddressExpr addrExpr = dynamic_cast< AddressExpr >( *arg ) ) {
242
243	*arg = addrExpr->get_arg();
244	} else {
245	UntypedExpr newExpr = new UntypedExpr( new NameExpr( "?" ) );
246	newExpr->get_args().push_back( *arg );
247	*arg = newExpr;
248	} // if
249	break;
250	}
251
252	default:
253	// do nothing
254	;
255	}
256
257	switch ( opInfo.type ) {
258	case OT_INDEX:
259	assert( applicationExpr->get_args().size() == 2 );
260	(arg++)->accept( this );
261	output << "[";
262	(arg)->accept( this );
263	output << "]";
264	break;
265
266	case OT_CALL:
267	// there are no intrinsic definitions of the function call operator or constructors or destructors
268	assert( false );
269	break;
270
271	case OT_CTOR:
272	// it's just an optimization to disallow this, so for now let it through
273	// since it makes autogenerating constructors a lot easier
274	varExpr->accept( *this );
275	output << "(";
276	genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
277	output << ")";
278
279	// intrinsic constructors should never be called directly - they should be transformed back into Initializer nodes
280	// assert(false);
281	break;
282
283	case OT_DTOR:
284	// intrinsic destructors do nothing - don't generate any code
285	output << " /* " << dynamic_cast<VariableExpr>(applicationExpr->get_function())->get_var()->get_name() << " /";
286	break;
287
288	case OT_PREFIX:
289	case OT_PREFIXASSIGN:
290	assert( applicationExpr->get_args().size() == 1 );
291	output << "(";
292	output << opInfo.symbol;
293	(arg)->accept( this );
294	output << ")";
295	break;
296
297	case OT_POSTFIX:
298	case OT_POSTFIXASSIGN:
299	assert( applicationExpr->get_args().size() == 1 );
300	(arg)->accept( this );
301	output << opInfo.symbol;
302	break;
303
304
305	case OT_INFIX:
306	case OT_INFIXASSIGN:
307	assert( applicationExpr->get_args().size() == 2 );
308	output << "(";
309	(arg++)->accept( this );
310	output << opInfo.symbol;
311	(arg)->accept( this );
312	output << ")";
313	break;
314
315	case OT_CONSTANT:
316	case OT_LABELADDRESS:
317	// there are no intrinsic definitions of 0/1 or label addresses as functions
318	assert( false );
319	}
320	} else {
321	varExpr->accept( *this );
322	output << "(";
323	genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
324	output << ")";
325	} // if
326	} else {
327	applicationExpr->get_function()->accept( *this );
328	output << "(";
329	genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
330	output << ")";
331	} // if
332	}
333
334	void CodeGenerator::visit( UntypedExpr *untypedExpr ) {
335	if ( NameExpr nameExpr = dynamic_cast< NameExpr >( untypedExpr->get_function() ) ) {
336	OperatorInfo opInfo;
337	if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
338	std::list< Expression* >::iterator arg = untypedExpr->get_args().begin();
339	switch ( opInfo.type ) {
340	case OT_INDEX:
341	assert( untypedExpr->get_args().size() == 2 );
342	(arg++)->accept( this );
343	output << "[";
344	(arg)->accept( this );
345	output << "]";
346	break;
347
348	case OT_CALL:
349	assert( false );
350
351	case OT_CTOR:
352	case OT_DTOR:
353	// intrinsic constructors should never be called
354	// intrinsic destructors do nothing
355	break;
356
357	case OT_PREFIX:
358	case OT_PREFIXASSIGN:
359	case OT_LABELADDRESS:
360	assert( untypedExpr->get_args().size() == 1 );
361	output << "(";
362	output << opInfo.symbol;
363	(arg)->accept( this );
364	output << ")";
365	break;
366
367	case OT_POSTFIX:
368	case OT_POSTFIXASSIGN:
369	assert( untypedExpr->get_args().size() == 1 );
370	(arg)->accept( this );
371	output << opInfo.symbol;
372	break;
373
374	case OT_INFIX:
375	case OT_INFIXASSIGN:
376	assert( untypedExpr->get_args().size() == 2 );
377	output << "(";
378	(arg++)->accept( this );
379	output << opInfo.symbol;
380	(arg)->accept( this );
381	output << ")";
382	break;
383
384	case OT_CONSTANT:
385	// there are no intrinsic definitions of 0 or 1 as functions
386	assert( false );
387	}
388	} else {
389	nameExpr->accept( *this );
390	output << "(";
391	genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
392	output << ")";
393	} // if
394	} else {
395	untypedExpr->get_function()->accept( *this );
396	output << "(";
397	genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
398	output << ")";
399	} // if
400	}
401
402	void CodeGenerator::visit( NameExpr *nameExpr ) {
403	OperatorInfo opInfo;
404	if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
405	assert( opInfo.type == OT_CONSTANT );
406	output << opInfo.symbol;
407	} else {
408	output << nameExpr->get_name();
409	} // if
410	}
411
412	void CodeGenerator::visit( AddressExpr *addressExpr ) {
413	output << "(&";
414	// this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address
415	if ( VariableExpr variableExpr = dynamic_cast< VariableExpr >( addressExpr->get_arg() ) ) {
416	output << mangleName( variableExpr->get_var() );
417	} else {
418	addressExpr->get_arg()->accept( *this );
419	} // if
420	output << ")";
421	}
422
423	void CodeGenerator::visit( CastExpr *castExpr ) {
424	output << "(";
425	if ( castExpr->get_results().empty() ) {
426	output << "(void)" ;
427	} else if ( ! castExpr->get_results().front()->get_isLvalue() ) {
428	// at least one result type of cast, but not an lvalue
429	output << "(";
430	output << genType( castExpr->get_results().front(), "" );
431	output << ")";
432	} else {
433	// otherwise, the cast is to an lvalue type, so the cast
434	// should be dropped, since the result of a cast is
435	// never an lvalue in C
436	}
437	castExpr->get_arg()->accept( *this );
438	output << ")";
439	}
440
441	void CodeGenerator::visit( UntypedMemberExpr *memberExpr ) {
442	assert( false );
443	}
444
445	void CodeGenerator::visit( MemberExpr *memberExpr ) {
446	memberExpr->get_aggregate()->accept( *this );
447	output << "." << mangleName( memberExpr->get_member() );
448	}
449
450	void CodeGenerator::visit( VariableExpr *variableExpr ) {
451	OperatorInfo opInfo;
452	if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) {
453	output << opInfo.symbol;
454	} else {
455	output << mangleName( variableExpr->get_var() );
456	} // if
457	}
458
459	void CodeGenerator::visit( ConstantExpr *constantExpr ) {
460	assert( constantExpr->get_constant() );
461	constantExpr->get_constant()->accept( *this );
462	}
463
464	void CodeGenerator::visit( SizeofExpr *sizeofExpr ) {
465	output << "sizeof(";
466	if ( sizeofExpr->get_isType() ) {
467	output << genType( sizeofExpr->get_type(), "" );
468	} else {
469	sizeofExpr->get_expr()->accept( *this );
470	} // if
471	output << ")";
472	}
473
474	void CodeGenerator::visit( AlignofExpr *alignofExpr ) {
475	// use GCC extension to avoid bumping std to C11
476	output << "__alignof__(";
477	if ( alignofExpr->get_isType() ) {
478	output << genType( alignofExpr->get_type(), "" );
479	} else {
480	alignofExpr->get_expr()->accept( *this );
481	} // if
482	output << ")";
483	}
484
485	void CodeGenerator::visit( UntypedOffsetofExpr *offsetofExpr ) {
486	assert( false );
487	}
488
489	void CodeGenerator::visit( OffsetofExpr *offsetofExpr ) {
490	// use GCC builtin
491	output << "__builtin_offsetof(";
492	output << genType( offsetofExpr->get_type(), "" );
493	output << ", " << mangleName( offsetofExpr->get_member() );
494	output << ")";
495	}
496
497	void CodeGenerator::visit( LogicalExpr *logicalExpr ) {
498	output << "(";
499	logicalExpr->get_arg1()->accept( *this );
500	if ( logicalExpr->get_isAnd() ) {
501	output << " && ";
502	} else {
503	output << " \|\| ";
504	} // if
505	logicalExpr->get_arg2()->accept( *this );
506	output << ")";
507	}
508
509	void CodeGenerator::visit( ConditionalExpr *conditionalExpr ) {
510	output << "(";
511	conditionalExpr->get_arg1()->accept( *this );
512	output << " ? ";
513	conditionalExpr->get_arg2()->accept( *this );
514	output << " : ";
515	conditionalExpr->get_arg3()->accept( *this );
516	output << ")";
517	}
518
519	void CodeGenerator::visit( CommaExpr *commaExpr ) {
520	output << "(";
521	commaExpr->get_arg1()->accept( *this );
522	output << " , ";
523	commaExpr->get_arg2()->accept( *this );
524	output << ")";
525	}
526
527	void CodeGenerator::visit( TupleExpr *tupleExpr ) {}
528
529	void CodeGenerator::visit( TypeExpr *typeExpr ) {}
530
531	void CodeGenerator::visit( AsmExpr *asmExpr ) {
532	if ( asmExpr->get_inout() ) {
533	output << "[ ";
534	asmExpr->get_inout()->accept( *this );
535	output << " ] ";
536	} // if
537	asmExpr->get_constraint()->accept( *this );
538	output << " ( ";
539	asmExpr->get_operand()->accept( *this );
540	output << " )";
541	}
542
543	//*** Statements
544	void CodeGenerator::visit( CompoundStmt *compoundStmt ) {
545	std::list<Statement*> ks = compoundStmt->get_kids();
546	output << "{" << endl;
547
548	cur_indent += CodeGenerator::tabsize;
549
550	for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) {
551	output << indent << printLabels( (*i)->get_labels() );
552	(i)->accept( this );
553
554	output << endl;
555	if ( wantSpacing( *i ) ) {
556	output << endl;
557	}
558	}
559	cur_indent -= CodeGenerator::tabsize;
560
561	output << indent << "}";
562	}
563
564	void CodeGenerator::visit( ExprStmt *exprStmt ) {
565	// I don't see why this check is necessary.
566	// If this starts to cause problems then put it back in,
567	// with an explanation
568	assert( exprStmt );
569
570	// if ( exprStmt != 0 ) {
571	exprStmt->get_expr()->accept( *this );
572	output << ";" ;
573	// } // if
574	}
575
576	void CodeGenerator::visit( AsmStmt *asmStmt ) {
577	output << "asm ";
578	if ( asmStmt->get_voltile() ) output << "volatile ";
579	if ( ! asmStmt->get_gotolabels().empty() ) output << "goto ";
580	output << "( ";
581	if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
582	output << " : ";
583	genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() );
584	output << " : ";
585	genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() );
586	output << " : ";
587	genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() );
588	if ( ! asmStmt->get_gotolabels().empty() ) {
589	output << " : ";
590	for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) {
591	output << *begin++;
592	if ( begin == asmStmt->get_gotolabels().end() ) break;
593	output << ", ";
594	} // for
595	} // if
596	output << " );" ;
597	}
598
599	void CodeGenerator::visit( IfStmt *ifStmt ) {
600	output << "if ( ";
601	ifStmt->get_condition()->accept( *this );
602	output << " ) ";
603
604	ifStmt->get_thenPart()->accept( *this );
605
606	if ( ifStmt->get_elsePart() != 0) {
607	output << " else ";
608	ifStmt->get_elsePart()->accept( *this );
609	} // if
610	}
611
612	void CodeGenerator::visit( SwitchStmt *switchStmt ) {
613	output << "switch ( " ;
614	switchStmt->get_condition()->accept( *this );
615	output << " ) ";
616
617	output << "{" << std::endl;
618	cur_indent += CodeGenerator::tabsize;
619
620	acceptAll( switchStmt->get_branches(), *this );
621
622	cur_indent -= CodeGenerator::tabsize;
623
624	output << indent << "}";
625	}
626
627	void CodeGenerator::visit( CaseStmt *caseStmt ) {
628	output << indent;
629	if ( caseStmt->isDefault()) {
630	output << "default";
631	} else {
632	output << "case ";
633	caseStmt->get_condition()->accept( *this );
634	} // if
635	output << ":\n";
636
637	std::list<Statement *> sts = caseStmt->get_statements();
638
639	cur_indent += CodeGenerator::tabsize;
640	for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) {
641	output << indent << printLabels( (*i)->get_labels() ) ;
642	(i)->accept( this );
643	output << endl;
644	}
645	cur_indent -= CodeGenerator::tabsize;
646	}
647
648	void CodeGenerator::visit( BranchStmt *branchStmt ) {
649	switch ( branchStmt->get_type()) {
650	case BranchStmt::Goto:
651	if ( ! branchStmt->get_target().empty() )
652	output << "goto " << branchStmt->get_target();
653	else {
654	if ( branchStmt->get_computedTarget() != 0 ) {
655	output << "goto *";
656	branchStmt->get_computedTarget()->accept( *this );
657	} // if
658	} // if
659	break;
660	case BranchStmt::Break:
661	output << "break";
662	break;
663	case BranchStmt::Continue:
664	output << "continue";
665	break;
666	}
667	output << ";";
668	}
669
670
671	void CodeGenerator::visit( ReturnStmt *returnStmt ) {
672	output << "return ";
673
674	// xxx -- check for null expression;
675	if ( returnStmt->get_expr() ) {
676	returnStmt->get_expr()->accept( *this );
677	} // if
678	output << ";";
679	}
680
681	void CodeGenerator::visit( WhileStmt *whileStmt ) {
682	if ( whileStmt->get_isDoWhile() )
683	output << "do" ;
684	else {
685	output << "while (" ;
686	whileStmt->get_condition()->accept( *this );
687	output << ")";
688	} // if
689	output << " ";
690
691	output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() );
692	whileStmt->get_body()->accept( *this );
693
694	output << indent;
695
696	if ( whileStmt->get_isDoWhile() ) {
697	output << " while (" ;
698	whileStmt->get_condition()->accept( *this );
699	output << ");";
700	} // if
701	}
702
703	void CodeGenerator::visit( ForStmt *forStmt ) {
704	// initialization is always hoisted, so don't
705	// bother doing anything with that
706	output << "for (;";
707
708	if ( forStmt->get_condition() != 0 )
709	forStmt->get_condition()->accept( *this );
710	output << ";";
711
712	if ( forStmt->get_increment() != 0 )
713	forStmt->get_increment()->accept( *this );
714	output << ") ";
715
716	if ( forStmt->get_body() != 0 ) {
717	output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() );
718	forStmt->get_body()->accept( *this );
719	} // if
720	}
721
722	void CodeGenerator::visit( NullStmt *nullStmt ) {
723	//output << indent << CodeGenerator::printLabels( nullStmt->get_labels() );
724	output << "/* null statement */ ;";
725	}
726
727	void CodeGenerator::visit( DeclStmt *declStmt ) {
728	declStmt->get_decl()->accept( *this );
729
730	if ( doSemicolon( declStmt->get_decl() ) ) {
731	output << ";";
732	} // if
733	}
734
735	std::string CodeGenerator::printLabels( std::list< Label > &l ) {
736	std::string str( "" );
737	l.unique(); // assumes a sorted list. Why not use set?
738
739	for ( std::list< Label >::iterator i = l.begin(); i != l.end(); i++ )
740	str += *i + ": ";
741
742	return str;
743	}
744
745	void CodeGenerator::handleStorageClass( Declaration *decl ) {
746	switch ( decl->get_storageClass() ) {
747	case DeclarationNode::Extern:
748	output << "extern ";
749	break;
750	case DeclarationNode::Static:
751	output << "static ";
752	break;
753	case DeclarationNode::Auto:
754	// silently drop storage class
755	break;
756	case DeclarationNode::Register:
757	output << "register ";
758	break;
759	case DeclarationNode::Inline:
760	output << "inline ";
761	break;
762	case DeclarationNode::Fortran:
763	output << "fortran ";
764	break;
765	case DeclarationNode::Noreturn:
766	output << "_Noreturn ";
767	break;
768	case DeclarationNode::Threadlocal:
769	output << "_Thread_local ";
770	break;
771	case DeclarationNode::NoStorageClass:
772	break;
773	} // switch
774	}
775	} // namespace CodeGen
776
777	// Local Variables: //
778	// tab-width: 4 //
779	// mode: c++ //
780	// compile-command: "make install" //
781	// End: //

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source: src/CodeGen/CodeGenerator.cc @ a5a71d0

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