source: src/CodeGen/CodeGenerator.cc@ 65cec25

ADT aaron-thesis arm-eh ast-experimental cleanup-dtors deferred_resn demangler enum forall-pointer-decay jacob/cs343-translation jenkins-sandbox new-ast new-ast-unique-expr new-env no_list persistent-indexer pthread-emulation qualifiedEnum resolv-new with_gc
Last change on this file since 65cec25 was 0a81c3f, checked in by Rob Schluntz <rschlunt@…>, 8 years ago

Remove several missing-reference related hacks
  • Property mode set to 100644
File size: 29.1 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 : Andrew Beach
12// Last Modified On : Thu Jun 8 16:00:00 2017
13// Update Count : 485
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#include "SynTree/Attribute.h"
29
30#include "Common/utility.h"
31#include "Common/UnimplementedError.h"
32
33#include "CodeGenerator.h"
34#include "OperatorTable.h"
35#include "GenType.h"
36
37#include "InitTweak/InitTweak.h"
38
39using namespace std;
40
41namespace CodeGen {
42 int CodeGenerator::tabsize = 4;
43
44 // the kinds of statements that would ideally be followed by whitespace
45 bool wantSpacing( Statement * stmt) {
46 return dynamic_cast< IfStmt * >( stmt ) || dynamic_cast< CompoundStmt * >( stmt ) ||
47 dynamic_cast< WhileStmt * >( stmt ) || dynamic_cast< ForStmt * >( stmt ) || dynamic_cast< SwitchStmt *>( stmt );
48 }
49
50 void CodeGenerator::extension( Expression * expr ) {
51 if ( expr->get_extension() ) {
52 output << "__extension__ ";
53 } // if
54 } // extension
55
56 void CodeGenerator::extension( Declaration * decl ) {
57 if ( decl->get_extension() ) {
58 output << "__extension__ ";
59 } // if
60 } // extension
61
62 void CodeGenerator::asmName( DeclarationWithType * decl ) {
63 if ( ConstantExpr * asmName = decl->get_asmName() ) {
64 output << " asm ( " << asmName->get_constant()->get_value() << " )";
65 } // if
66 } // extension
67
68 CodeGenerator::LabelPrinter & CodeGenerator::LabelPrinter::operator()( std::list< Label > & l ) {
69 labels = &l;
70 return *this;
71 }
72
73 ostream & operator<<( ostream & output, CodeGenerator::LabelPrinter & printLabels ) {
74 std::list< Label > & labs = *printLabels.labels;
75 // l.unique(); // assumes a sorted list. Why not use set? Does order matter?
76 for ( Label & l : labs ) {
77 output << l.get_name() + ": ";
78 printLabels.cg.genAttributes( l.get_attributes() );
79 } // for
80 return output;
81 }
82
83 CodeGenerator::LineMarker::LineMarker(
84 CodeLocation const & loc, bool toPrint) :
85 loc(loc), toPrint(toPrint)
86 {}
87
88 CodeGenerator::LineMarker CodeGenerator::lineDirective(
89 BaseSyntaxNode const * node) {
90 return LineMarker(node->location, lineMarks);
91 }
92
93 std::ostream & operator<<(std::ostream & out,
94 CodeGenerator::LineMarker const & marker) {
95 if (marker.toPrint && marker.loc.isSet()) {
96 return out << "\n# " << marker.loc.linenumber << " \""
97 << marker.loc.filename << "\"\n";
98 } else if (marker.toPrint) {
99 return out << "\n/* Missing CodeLocation */\n";
100 } else {
101 return out;
102 }
103 }
104
105 CodeGenerator::CodeGenerator( std::ostream & os, bool pretty, bool genC, bool lineMarks ) : indent( CodeGenerator::tabsize ), insideFunction( false ), output( os ), printLabels( *this ), pretty( pretty ), genC( genC ), lineMarks( lineMarks ) {}
106
107 string CodeGenerator::mangleName( DeclarationWithType * decl ) {
108 if ( pretty ) return decl->get_name();
109 if ( decl->get_mangleName() != "" ) {
110 // need to incorporate scope level in order to differentiate names for destructors
111 return decl->get_scopedMangleName();
112 } else {
113 return decl->get_name();
114 } // if
115 }
116
117 void CodeGenerator::genAttributes( list< Attribute * > & attributes ) {
118 if ( attributes.empty() ) return;
119 output << "__attribute__ ((";
120 for ( list< Attribute * >::iterator attr( attributes.begin() );; ) {
121 output << (*attr)->get_name();
122 if ( ! (*attr)->get_parameters().empty() ) {
123 output << "(";
124 genCommaList( (*attr)->get_parameters().begin(), (*attr)->get_parameters().end() );
125 output << ")";
126 } // if
127 if ( ++attr == attributes.end() ) break;
128 output << ","; // separator
129 } // for
130 output << ")) ";
131 } // CodeGenerator::genAttributes
132
133
134 // *** Declarations
135 void CodeGenerator::visit( FunctionDecl * functionDecl ) {
136 extension( functionDecl );
137 genAttributes( functionDecl->get_attributes() );
138
139 handleStorageClass( functionDecl );
140 functionDecl->get_funcSpec().print( output );
141
142 output << genType( functionDecl->get_functionType(), mangleName( functionDecl ), pretty, genC );
143
144 asmName( functionDecl );
145
146 // acceptAll( functionDecl->get_oldDecls(), *this );
147 if ( functionDecl->get_statements() ) {
148 functionDecl->get_statements()->accept( *this );
149 } // if
150 }
151
152 void CodeGenerator::visit( ObjectDecl * objectDecl ) {
153 if (objectDecl->get_name().empty() && genC ) {
154 // only generate an anonymous name when generating C code, otherwise it clutters the output too much
155 static UniqueName name = { "__anonymous_object" };
156 objectDecl->set_name( name.newName() );
157 }
158
159 extension( objectDecl );
160 genAttributes( objectDecl->get_attributes() );
161
162 handleStorageClass( objectDecl );
163 output << genType( objectDecl->get_type(), mangleName( objectDecl ), pretty, genC );
164
165 asmName( objectDecl );
166
167 if ( objectDecl->get_init() ) {
168 output << " = ";
169 objectDecl->get_init()->accept( *this );
170 } // if
171
172 if ( objectDecl->get_bitfieldWidth() ) {
173 output << ":";
174 objectDecl->get_bitfieldWidth()->accept( *this );
175 } // if
176 }
177
178 void CodeGenerator::handleAggregate( AggregateDecl * aggDecl, const std::string & kind ) {
179 genAttributes( aggDecl->get_attributes() );
180
181 if( ! aggDecl->get_parameters().empty() && ! genC ) {
182 // assertf( ! genC, "Aggregate type parameters should not reach code generation." );
183 output << "forall(";
184 genCommaList( aggDecl->get_parameters().begin(), aggDecl->get_parameters().end() );
185 output << ")" << endl;
186 }
187
188 output << kind;
189 if ( aggDecl->get_name() != "" )
190 output << aggDecl->get_name();
191
192 if ( aggDecl->has_body() ) {
193 std::list< Declaration * > & memb = aggDecl->get_members();
194 output << " {" << endl;
195
196 ++indent;
197 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++ ) {
198 output << lineDirective( *i ) << indent;
199 (*i)->accept( *this );
200 output << ";" << endl;
201 } // for
202
203 --indent;
204
205 output << indent << "}";
206 } // if
207 }
208
209 void CodeGenerator::visit( StructDecl * structDecl ) {
210 extension( structDecl );
211 handleAggregate( structDecl, "struct " );
212 }
213
214 void CodeGenerator::visit( UnionDecl * unionDecl ) {
215 extension( unionDecl );
216 handleAggregate( unionDecl, "union " );
217 }
218
219 void CodeGenerator::visit( EnumDecl * enumDecl ) {
220 extension( enumDecl );
221 output << lineDirective ( enumDecl );
222 output << "enum ";
223 genAttributes( enumDecl->get_attributes() );
224
225 if ( enumDecl->get_name() != "" )
226 output << enumDecl->get_name();
227
228 std::list< Declaration* > &memb = enumDecl->get_members();
229
230 if ( ! memb.empty() ) {
231 output << " {" << endl;
232
233 ++indent;
234 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) {
235 ObjectDecl * obj = dynamic_cast< ObjectDecl* >( *i );
236 assert( obj );
237 output << lineDirective( obj ) << indent << mangleName( obj );
238 if ( obj->get_init() ) {
239 output << " = ";
240 obj->get_init()->accept( *this );
241 } // if
242 output << "," << endl;
243 } // for
244
245 --indent;
246
247 output << indent << "}";
248 } // if
249 }
250
251 void CodeGenerator::visit( __attribute__((unused)) TraitDecl * traitDecl ) {}
252
253 void CodeGenerator::visit( TypedefDecl * typeDecl ) {
254 assertf( ! genC, "Typedefs are removed and substituted in earlier passes." );
255 output << lineDirective( typeDecl );
256 output << "typedef ";
257 output << genType( typeDecl->get_base(), typeDecl->get_name(), pretty, genC ) << endl;
258 }
259
260 void CodeGenerator::visit( TypeDecl * typeDecl ) {
261 if ( genC ) {
262 // really, we should mutate this into something that isn't a TypeDecl but that requires large-scale changes,
263 // still to be done
264 extension( typeDecl );
265 output << "extern unsigned long " << typeDecl->get_name();
266 if ( typeDecl->get_base() ) {
267 output << " = sizeof( " << genType( typeDecl->get_base(), "", pretty, genC ) << " )";
268 } // if
269 } else {
270 output << typeDecl->genTypeString() << " " << typeDecl->get_name();
271 if ( typeDecl->get_kind() != TypeDecl::Any && typeDecl->get_sized() ) {
272 output << " | sized(" << typeDecl->get_name() << ")";
273 }
274 if ( ! typeDecl->get_assertions().empty() ) {
275 output << " | { ";
276 genCommaList( typeDecl->get_assertions().begin(), typeDecl->get_assertions().end() );
277 output << " }";
278 }
279 }
280 }
281
282 void CodeGenerator::visit( Designation * designation ) {
283 std::list< Expression * > designators = designation->get_designators();
284 if ( designators.size() == 0 ) return;
285 for ( Expression * des : designators ) {
286 if ( dynamic_cast< NameExpr * >( des ) || dynamic_cast< VariableExpr * >( des ) ) {
287 // if expression is a NameExpr or VariableExpr, then initializing aggregate member
288 output << ".";
289 des->accept( *this );
290 } else {
291 // otherwise, it has to be a ConstantExpr or CastExpr, initializing array eleemnt
292 output << "[";
293 des->accept( *this );
294 output << "]";
295 } // if
296 } // for
297 output << " = ";
298 }
299
300 void CodeGenerator::visit( SingleInit * init ) {
301 init->get_value()->accept( *this );
302 }
303
304 void CodeGenerator::visit( ListInit * init ) {
305 auto initBegin = init->begin();
306 auto initEnd = init->end();
307 auto desigBegin = init->get_designations().begin();
308 auto desigEnd = init->get_designations().end();
309
310 output << "{ ";
311 for ( ; initBegin != initEnd && desigBegin != desigEnd; ) {
312 (*desigBegin)->accept( *this );
313 (*initBegin)->accept( *this );
314 ++initBegin, ++desigBegin;
315 if ( initBegin != initEnd ) {
316 output << ", ";
317 }
318 }
319 output << " }";
320 assertf( initBegin == initEnd && desigBegin == desigEnd, "Initializers and designators not the same length. %s", toString( init ).c_str() );
321 }
322
323 void CodeGenerator::visit( __attribute__((unused)) ConstructorInit * init ){
324 assertf( ! genC, "ConstructorInit nodes should not reach code generation." );
325 // xxx - generate something reasonable for constructor/destructor pairs
326 output << "<ctorinit>";
327 }
328
329 void CodeGenerator::visit( Constant * constant ) {
330 output << constant->get_value() ;
331 }
332
333 // *** Expressions
334 void CodeGenerator::visit( ApplicationExpr * applicationExpr ) {
335 extension( applicationExpr );
336 if ( VariableExpr * varExpr = dynamic_cast< VariableExpr* >( applicationExpr->get_function() ) ) {
337 OperatorInfo opInfo;
338 if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( varExpr->get_var()->get_name(), opInfo ) ) {
339 std::list< Expression* >::iterator arg = applicationExpr->get_args().begin();
340 switch ( opInfo.type ) {
341 case OT_INDEX:
342 assert( applicationExpr->get_args().size() == 2 );
343 (*arg++)->accept( *this );
344 output << "[";
345 (*arg)->accept( *this );
346 output << "]";
347 break;
348
349 case OT_CALL:
350 // there are no intrinsic definitions of the function call operator
351 assert( false );
352 break;
353
354 case OT_CTOR:
355 case OT_DTOR:
356 if ( applicationExpr->get_args().size() == 1 ) {
357 // the expression fed into a single parameter constructor or destructor may contain side
358 // effects, so must still output this expression
359 output << "(";
360 (*arg++)->accept( *this );
361 output << ") /* " << opInfo.inputName << " */";
362 } else if ( applicationExpr->get_args().size() == 2 ) {
363 // intrinsic two parameter constructors are essentially bitwise assignment
364 output << "(";
365 (*arg++)->accept( *this );
366 output << opInfo.symbol;
367 (*arg)->accept( *this );
368 output << ") /* " << opInfo.inputName << " */";
369 } else {
370 // no constructors with 0 or more than 2 parameters
371 assert( false );
372 } // if
373 break;
374
375 case OT_PREFIX:
376 case OT_PREFIXASSIGN:
377 assert( applicationExpr->get_args().size() == 1 );
378 output << "(";
379 output << opInfo.symbol;
380 (*arg)->accept( *this );
381 output << ")";
382 break;
383
384 case OT_POSTFIX:
385 case OT_POSTFIXASSIGN:
386 assert( applicationExpr->get_args().size() == 1 );
387 (*arg)->accept( *this );
388 output << opInfo.symbol;
389 break;
390
391
392 case OT_INFIX:
393 case OT_INFIXASSIGN:
394 assert( applicationExpr->get_args().size() == 2 );
395 output << "(";
396 (*arg++)->accept( *this );
397 output << opInfo.symbol;
398 (*arg)->accept( *this );
399 output << ")";
400 break;
401
402 case OT_CONSTANT:
403 case OT_LABELADDRESS:
404 // there are no intrinsic definitions of 0/1 or label addresses as functions
405 assert( false );
406 } // switch
407 } else {
408 varExpr->accept( *this );
409 output << "(";
410 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
411 output << ")";
412 } // if
413 } else {
414 applicationExpr->get_function()->accept( *this );
415 output << "(";
416 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
417 output << ")";
418 } // if
419 }
420
421 void CodeGenerator::visit( UntypedExpr * untypedExpr ) {
422 extension( untypedExpr );
423 if ( NameExpr * nameExpr = dynamic_cast< NameExpr* >( untypedExpr->get_function() ) ) {
424 OperatorInfo opInfo;
425 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
426 std::list< Expression* >::iterator arg = untypedExpr->get_args().begin();
427 switch ( opInfo.type ) {
428 case OT_INDEX:
429 assert( untypedExpr->get_args().size() == 2 );
430 (*arg++)->accept( *this );
431 output << "[";
432 (*arg)->accept( *this );
433 output << "]";
434 break;
435
436 case OT_CALL:
437 assert( false );
438
439 case OT_CTOR:
440 case OT_DTOR:
441 if ( untypedExpr->get_args().size() == 1 ) {
442 // the expression fed into a single parameter constructor or destructor may contain side
443 // effects, so must still output this expression
444 output << "(";
445 (*arg++)->accept( *this );
446 output << ") /* " << opInfo.inputName << " */";
447 } else if ( untypedExpr->get_args().size() == 2 ) {
448 // intrinsic two parameter constructors are essentially bitwise assignment
449 output << "(";
450 (*arg++)->accept( *this );
451 output << opInfo.symbol;
452 (*arg)->accept( *this );
453 output << ") /* " << opInfo.inputName << " */";
454 } else {
455 // no constructors with 0 or more than 2 parameters
456 assert( false );
457 } // if
458 break;
459
460 case OT_PREFIX:
461 case OT_PREFIXASSIGN:
462 case OT_LABELADDRESS:
463 assert( untypedExpr->get_args().size() == 1 );
464 output << "(";
465 output << opInfo.symbol;
466 (*arg)->accept( *this );
467 output << ")";
468 break;
469
470 case OT_POSTFIX:
471 case OT_POSTFIXASSIGN:
472 assert( untypedExpr->get_args().size() == 1 );
473 (*arg)->accept( *this );
474 output << opInfo.symbol;
475 break;
476
477 case OT_INFIX:
478 case OT_INFIXASSIGN:
479 assert( untypedExpr->get_args().size() == 2 );
480 output << "(";
481 (*arg++)->accept( *this );
482 output << opInfo.symbol;
483 (*arg)->accept( *this );
484 output << ")";
485 break;
486
487 case OT_CONSTANT:
488 // there are no intrinsic definitions of 0 or 1 as functions
489 assert( false );
490 } // switch
491 } else {
492 if ( nameExpr->get_name() == "..." ) { // case V1 ... V2 or case V1~V2
493 assert( untypedExpr->get_args().size() == 2 );
494 (*untypedExpr->get_args().begin())->accept( *this );
495 output << " ... ";
496 (*--untypedExpr->get_args().end())->accept( *this );
497 } else { // builtin routines
498 nameExpr->accept( *this );
499 output << "(";
500 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
501 output << ")";
502 } // if
503 } // if
504 } else {
505 untypedExpr->get_function()->accept( *this );
506 output << "(";
507 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
508 output << ")";
509 } // if
510 }
511
512 void CodeGenerator::visit( RangeExpr * rangeExpr ) {
513 rangeExpr->get_low()->accept( *this );
514 output << " ... ";
515 rangeExpr->get_high()->accept( *this );
516 }
517
518 void CodeGenerator::visit( NameExpr * nameExpr ) {
519 extension( nameExpr );
520 OperatorInfo opInfo;
521 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
522 assert( opInfo.type == OT_CONSTANT );
523 output << opInfo.symbol;
524 } else {
525 output << nameExpr->get_name();
526 } // if
527 }
528
529 void CodeGenerator::visit( AddressExpr * addressExpr ) {
530 extension( addressExpr );
531 output << "(&";
532 // this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address
533 if ( VariableExpr * variableExpr = dynamic_cast< VariableExpr* >( addressExpr->get_arg() ) ) {
534 output << mangleName( variableExpr->get_var() );
535 } else {
536 addressExpr->get_arg()->accept( *this );
537 } // if
538 output << ")";
539 }
540
541 void CodeGenerator::visit( CastExpr * castExpr ) {
542 extension( castExpr );
543 output << "(";
544 if ( castExpr->get_result()->isVoid() ) {
545 output << "(void)" ;
546 } else if ( ! castExpr->get_result()->get_lvalue() ) {
547 // at least one result type of cast, but not an lvalue
548 output << "(";
549 output << genType( castExpr->get_result(), "", pretty, genC );
550 output << ")";
551 } else {
552 // otherwise, the cast is to an lvalue type, so the cast should be dropped, since the result of a cast is
553 // never an lvalue in C
554 } // if
555 castExpr->get_arg()->accept( *this );
556 output << ")";
557 }
558
559 void CodeGenerator::visit( UntypedMemberExpr * memberExpr ) {
560 assertf( ! genC, "UntypedMemberExpr should not reach code generation." );
561 extension( memberExpr );
562 memberExpr->get_aggregate()->accept( *this );
563 output << ".";
564 memberExpr->get_member()->accept( *this );
565 }
566
567 void CodeGenerator::visit( MemberExpr * memberExpr ) {
568 extension( memberExpr );
569 memberExpr->get_aggregate()->accept( *this );
570 output << "." << mangleName( memberExpr->get_member() );
571 }
572
573 void CodeGenerator::visit( VariableExpr * variableExpr ) {
574 extension( variableExpr );
575 OperatorInfo opInfo;
576 if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) {
577 output << opInfo.symbol;
578 } else {
579 output << mangleName( variableExpr->get_var() );
580 } // if
581 }
582
583 void CodeGenerator::visit( ConstantExpr * constantExpr ) {
584 assert( constantExpr->get_constant() );
585 extension( constantExpr );
586 constantExpr->get_constant()->accept( *this );
587 }
588
589 void CodeGenerator::visit( SizeofExpr * sizeofExpr ) {
590 extension( sizeofExpr );
591 output << "sizeof(";
592 if ( sizeofExpr->get_isType() ) {
593 output << genType( sizeofExpr->get_type(), "", pretty, genC );
594 } else {
595 sizeofExpr->get_expr()->accept( *this );
596 } // if
597 output << ")";
598 }
599
600 void CodeGenerator::visit( AlignofExpr * alignofExpr ) {
601 // use GCC extension to avoid bumping std to C11
602 extension( alignofExpr );
603 output << "__alignof__(";
604 if ( alignofExpr->get_isType() ) {
605 output << genType( alignofExpr->get_type(), "", pretty, genC );
606 } else {
607 alignofExpr->get_expr()->accept( *this );
608 } // if
609 output << ")";
610 }
611
612 void CodeGenerator::visit( UntypedOffsetofExpr * offsetofExpr ) {
613 assertf( ! genC, "UntypedOffsetofExpr should not reach code generation." );
614 output << "offsetof(";
615 output << genType( offsetofExpr->get_type(), "", pretty, genC );
616 output << ", " << offsetofExpr->get_member();
617 output << ")";
618 }
619
620 void CodeGenerator::visit( OffsetofExpr * offsetofExpr ) {
621 // use GCC builtin
622 output << "__builtin_offsetof(";
623 output << genType( offsetofExpr->get_type(), "", pretty, genC );
624 output << ", " << mangleName( offsetofExpr->get_member() );
625 output << ")";
626 }
627
628 void CodeGenerator::visit( OffsetPackExpr * offsetPackExpr ) {
629 assertf( ! genC, "OffsetPackExpr should not reach code generation." );
630 output << "__CFA_offsetpack(" << genType( offsetPackExpr->get_type(), "", pretty, genC ) << ")";
631 }
632
633 void CodeGenerator::visit( LogicalExpr * logicalExpr ) {
634 extension( logicalExpr );
635 output << "(";
636 logicalExpr->get_arg1()->accept( *this );
637 if ( logicalExpr->get_isAnd() ) {
638 output << " && ";
639 } else {
640 output << " || ";
641 } // if
642 logicalExpr->get_arg2()->accept( *this );
643 output << ")";
644 }
645
646 void CodeGenerator::visit( ConditionalExpr * conditionalExpr ) {
647 extension( conditionalExpr );
648 output << "(";
649 conditionalExpr->get_arg1()->accept( *this );
650 output << " ? ";
651 conditionalExpr->get_arg2()->accept( *this );
652 output << " : ";
653 conditionalExpr->get_arg3()->accept( *this );
654 output << ")";
655 }
656
657 void CodeGenerator::visit( CommaExpr * commaExpr ) {
658 extension( commaExpr );
659 output << "(";
660 commaExpr->get_arg1()->accept( *this );
661 output << " , ";
662 commaExpr->get_arg2()->accept( *this );
663 output << ")";
664 }
665
666 void CodeGenerator::visit( UntypedTupleExpr * tupleExpr ) {
667 assertf( ! genC, "UntypedTupleExpr should not reach code generation." );
668 extension( tupleExpr );
669 output << "[";
670 genCommaList( tupleExpr->get_exprs().begin(), tupleExpr->get_exprs().end() );
671 output << "]";
672 }
673
674 void CodeGenerator::visit( TupleExpr * tupleExpr ) {
675 assertf( ! genC, "TupleExpr should not reach code generation." );
676 extension( tupleExpr );
677 output << "[";
678 genCommaList( tupleExpr->get_exprs().begin(), tupleExpr->get_exprs().end() );
679 output << "]";
680 }
681
682 void CodeGenerator::visit( TupleIndexExpr * tupleExpr ) {
683 assertf( ! genC, "TupleIndexExpr should not reach code generation." );
684 extension( tupleExpr );
685 tupleExpr->get_tuple()->accept( *this );
686 output << "." << tupleExpr->get_index();
687 }
688
689 void CodeGenerator::visit( TypeExpr * typeExpr ) {
690 // if ( genC ) std::cerr << "typeexpr still exists: " << typeExpr << std::endl;
691 // assertf( ! genC, "TypeExpr should not reach code generation." );
692 if ( ! genC ) {
693 output<< genType( typeExpr->get_type(), "", pretty, genC );
694 }
695 }
696
697 void CodeGenerator::visit( AsmExpr * asmExpr ) {
698 if ( asmExpr->get_inout() ) {
699 output << "[ ";
700 asmExpr->get_inout()->accept( *this );
701 output << " ] ";
702 } // if
703 asmExpr->get_constraint()->accept( *this );
704 output << " ( ";
705 asmExpr->get_operand()->accept( *this );
706 output << " )";
707 }
708
709 void CodeGenerator::visit( CompoundLiteralExpr *compLitExpr ) {
710 assert( compLitExpr->get_result() && dynamic_cast< ListInit * > ( compLitExpr->get_initializer() ) );
711 output << "(" << genType( compLitExpr->get_result(), "", pretty, genC ) << ")";
712 compLitExpr->get_initializer()->accept( *this );
713 }
714
715 void CodeGenerator::visit( StmtExpr * stmtExpr ) {
716 std::list< Statement * > & stmts = stmtExpr->get_statements()->get_kids();
717 output << lineDirective( stmtExpr) << "({" << std::endl;
718 ++indent;
719 unsigned int numStmts = stmts.size();
720 unsigned int i = 0;
721 for ( Statement * stmt : stmts ) {
722 output << lineDirective( stmt ) << indent;
723 output << printLabels( stmt->get_labels() );
724 if ( i+1 == numStmts ) {
725 // last statement in a statement expression needs to be handled specially -
726 // cannot cast to void, otherwise the expression statement has no value
727 if ( ExprStmt * exprStmt = dynamic_cast< ExprStmt * >( stmt ) ) {
728 exprStmt->get_expr()->accept( *this );
729 output << ";" << endl;
730 ++i;
731 break;
732 }
733 }
734 stmt->accept( *this );
735 output << endl;
736 if ( wantSpacing( stmt ) ) {
737 output << endl;
738 } // if
739 ++i;
740 }
741 --indent;
742 output << indent << "})";
743 }
744
745 // *** Statements
746 void CodeGenerator::visit( CompoundStmt * compoundStmt ) {
747 std::list<Statement*> ks = compoundStmt->get_kids();
748 output << "{" << endl;
749
750 ++indent;
751
752 for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) {
753 output << indent << printLabels( (*i)->get_labels() );
754 (*i)->accept( *this );
755
756 output << endl;
757 if ( wantSpacing( *i ) ) {
758 output << endl;
759 } // if
760 } // for
761 --indent;
762
763 output << indent << "}";
764 }
765
766 void CodeGenerator::visit( ExprStmt * exprStmt ) {
767 assert( exprStmt );
768 Expression * expr = exprStmt->get_expr();
769 if ( genC ) {
770 // cast the top-level expression to void to reduce gcc warnings.
771 expr = new CastExpr( expr );
772 }
773 expr->accept( *this );
774 output << ";";
775 }
776
777 void CodeGenerator::visit( AsmStmt * asmStmt ) {
778 output << "asm ";
779 if ( asmStmt->get_voltile() ) output << "volatile ";
780 if ( ! asmStmt->get_gotolabels().empty() ) output << "goto ";
781 output << "( ";
782 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
783 output << " : ";
784 genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() );
785 output << " : ";
786 genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() );
787 output << " : ";
788 genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() );
789 if ( ! asmStmt->get_gotolabels().empty() ) {
790 output << " : ";
791 for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) {
792 output << *begin++;
793 if ( begin == asmStmt->get_gotolabels().end() ) break;
794 output << ", ";
795 } // for
796 } // if
797 output << " );" ;
798 }
799
800 void CodeGenerator::visit( AsmDecl * asmDecl ) {
801 output << "asm ";
802 AsmStmt * asmStmt = asmDecl->get_stmt();
803 output << "( ";
804 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
805 output << " )" ;
806 }
807
808 void CodeGenerator::visit( IfStmt * ifStmt ) {
809 output << lineDirective( ifStmt );
810 output << "if ( ";
811 ifStmt->get_condition()->accept( *this );
812 output << " ) ";
813
814 ifStmt->get_thenPart()->accept( *this );
815
816 if ( ifStmt->get_elsePart() != 0) {
817 output << " else ";
818 ifStmt->get_elsePart()->accept( *this );
819 } // if
820 }
821
822 void CodeGenerator::visit( SwitchStmt * switchStmt ) {
823 output << lineDirective( switchStmt );
824 output << "switch ( " ;
825 switchStmt->get_condition()->accept( *this );
826 output << " ) ";
827
828 output << "{" << std::endl;
829 ++indent;
830 acceptAll( switchStmt->get_statements(), *this );
831 --indent;
832 output << indent << "}";
833 }
834
835 void CodeGenerator::visit( CaseStmt * caseStmt ) {
836 output << lineDirective( caseStmt );
837 output << indent;
838 if ( caseStmt->isDefault()) {
839 output << "default";
840 } else {
841 output << "case ";
842 caseStmt->get_condition()->accept( *this );
843 } // if
844 output << ":\n";
845
846 std::list<Statement *> sts = caseStmt->get_statements();
847
848 ++indent;
849 for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) {
850 output << indent << printLabels( (*i)->get_labels() ) ;
851 (*i)->accept( *this );
852 output << endl;
853 } // for
854 --indent;
855 }
856
857 void CodeGenerator::visit( BranchStmt * branchStmt ) {
858 switch ( branchStmt->get_type()) {
859 case BranchStmt::Goto:
860 if ( ! branchStmt->get_target().empty() )
861 output << "goto " << branchStmt->get_target();
862 else {
863 if ( branchStmt->get_computedTarget() != 0 ) {
864 output << "goto *";
865 branchStmt->get_computedTarget()->accept( *this );
866 } // if
867 } // if
868 break;
869 case BranchStmt::Break:
870 output << "break";
871 break;
872 case BranchStmt::Continue:
873 output << "continue";
874 break;
875 } // switch
876 output << ";";
877 }
878
879 void CodeGenerator::visit( ReturnStmt * returnStmt ) {
880 output << "return ";
881 maybeAccept( returnStmt->get_expr(), *this );
882 output << ";";
883 }
884
885 void CodeGenerator::visit( ThrowStmt * throwStmt ) {
886 assertf( ! genC, "Throw statements should not reach code generation." );
887
888 output << ((throwStmt->get_kind() == ThrowStmt::Terminate) ?
889 "throw" : "throwResume");
890 if (throwStmt->get_expr()) {
891 output << " ";
892 throwStmt->get_expr()->accept( *this );
893 }
894 if (throwStmt->get_target()) {
895 output << " _At ";
896 throwStmt->get_target()->accept( *this );
897 }
898 output << ";";
899 }
900
901 void CodeGenerator::visit( WhileStmt * whileStmt ) {
902 if ( whileStmt->get_isDoWhile() ) {
903 output << "do" ;
904 } else {
905 output << "while (" ;
906 whileStmt->get_condition()->accept( *this );
907 output << ")";
908 } // if
909 output << " ";
910
911 output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() );
912 whileStmt->get_body()->accept( *this );
913
914 output << indent;
915
916 if ( whileStmt->get_isDoWhile() ) {
917 output << " while (" ;
918 whileStmt->get_condition()->accept( *this );
919 output << ");";
920 } // if
921 }
922
923 void CodeGenerator::visit( ForStmt * forStmt ) {
924 // initialization is always hoisted, so don't bother doing anything with that
925 output << "for (;";
926
927 if ( forStmt->get_condition() != 0 ) {
928 forStmt->get_condition()->accept( *this );
929 } // if
930 output << ";";
931
932 if ( forStmt->get_increment() != 0 ) {
933 // cast the top-level expression to void to reduce gcc warnings.
934 Expression * expr = new CastExpr( forStmt->get_increment() );
935 expr->accept( *this );
936 } // if
937 output << ") ";
938
939 if ( forStmt->get_body() != 0 ) {
940 output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() );
941 forStmt->get_body()->accept( *this );
942 } // if
943 }
944
945 void CodeGenerator::visit( __attribute__((unused)) NullStmt * nullStmt ) {
946 //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() );
947 output << "/* null statement */ ;";
948 }
949
950 void CodeGenerator::visit( DeclStmt * declStmt ) {
951 declStmt->get_decl()->accept( *this );
952
953 if ( doSemicolon( declStmt->get_decl() ) ) {
954 output << ";";
955 } // if
956 }
957
958 void CodeGenerator::handleStorageClass( DeclarationWithType * decl ) {
959 if ( decl->get_storageClasses().any() ) {
960 decl->get_storageClasses().print( output );
961 } // if
962 } // CodeGenerator::handleStorageClass
963
964 std::string genName( DeclarationWithType * decl ) {
965 CodeGen::OperatorInfo opInfo;
966 if ( operatorLookup( decl->get_name(), opInfo ) ) {
967 return opInfo.outputName;
968 } else {
969 return decl->get_name();
970 } // if
971 }
972} // namespace CodeGen
973
974// Local Variables: //
975// tab-width: 4 //
976// mode: c++ //
977// compile-command: "make install" //
978// End: //
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