source: src/CodeGen/CodeGenerator.cc@ c57ded70

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 c57ded70 was b3c7963, checked in by Rob Schluntz <rschlunt@…>, 8 years ago

Merge branch 'master' of plg.uwaterloo.ca:/u/cforall/software/cfa/cfa-cc
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File size: 30.6 KB
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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 : Peter A. Buhr
12// Last Modified On : Sun Sep 3 20:42:52 2017
13// Update Count : 490
14//
15#include "CodeGenerator.h"
16
17#include <cassert> // for assert, assertf
18#include <list> // for _List_iterator, list, list<>::it...
19
20#include "Common/SemanticError.h" // for SemanticError
21#include "Common/UniqueName.h" // for UniqueName
22#include "Common/utility.h" // for CodeLocation, toString
23#include "GenType.h" // for genType
24#include "InitTweak/InitTweak.h" // for getPointerBase
25#include "OperatorTable.h" // for OperatorInfo, operatorLookup
26#include "Parser/LinkageSpec.h" // for Spec, Intrinsic
27#include "SynTree/Attribute.h" // for Attribute
28#include "SynTree/BaseSyntaxNode.h" // for BaseSyntaxNode
29#include "SynTree/Constant.h" // for Constant
30#include "SynTree/Declaration.h" // for DeclarationWithType, TypeDecl
31#include "SynTree/Expression.h" // for Expression, UntypedExpr, Applica...
32#include "SynTree/Initializer.h" // for Initializer, ListInit, Designation
33#include "SynTree/Label.h" // for Label, operator<<
34#include "SynTree/Statement.h" // for Statement, AsmStmt, BranchStmt
35#include "SynTree/Type.h" // for Type, Type::StorageClasses, Func...
36
37using namespace std;
38
39namespace CodeGen {
40 int CodeGenerator::tabsize = 4;
41
42 // the kinds of statements that would ideally be followed by whitespace
43 bool wantSpacing( Statement * stmt) {
44 return dynamic_cast< IfStmt * >( stmt ) || dynamic_cast< CompoundStmt * >( stmt ) ||
45 dynamic_cast< WhileStmt * >( stmt ) || dynamic_cast< ForStmt * >( stmt ) || dynamic_cast< SwitchStmt *>( stmt );
46 }
47
48 void CodeGenerator::extension( Expression * expr ) {
49 if ( expr->get_extension() ) {
50 output << "__extension__ ";
51 } // if
52 } // extension
53
54 void CodeGenerator::extension( Declaration * decl ) {
55 if ( decl->get_extension() ) {
56 output << "__extension__ ";
57 } // if
58 } // extension
59
60 void CodeGenerator::asmName( DeclarationWithType * decl ) {
61 if ( ConstantExpr * asmName = dynamic_cast<ConstantExpr *>(decl->get_asmName()) ) {
62 output << " asm ( " << asmName->get_constant()->get_value() << " )";
63 } // if
64 } // extension
65
66 CodeGenerator::LabelPrinter & CodeGenerator::LabelPrinter::operator()( std::list< Label > & l ) {
67 labels = &l;
68 return *this;
69 }
70
71 ostream & operator<<( ostream & output, CodeGenerator::LabelPrinter & printLabels ) {
72 std::list< Label > & labs = *printLabels.labels;
73 // l.unique(); // assumes a sorted list. Why not use set? Does order matter?
74 for ( Label & l : labs ) {
75 output << l.get_name() + ": ";
76 printLabels.cg.genAttributes( l.get_attributes() );
77 } // for
78 return output;
79 }
80
81 /* Using updateLocation at the beginning of a node and nextLine
82 * within a node should become the method of formating.
83 */
84 void CodeGenerator::updateLocation( CodeLocation const & to ) {
85 if ( !lineMarks ) {
86 return;
87 } else if ( currentLocation.followedBy( to, 0 ) ) {
88 return;
89 } else if ( currentLocation.followedBy( to, 1 ) ) {
90 output << "\n" << indent;
91 currentLocation.linenumber += 1;
92 } else if ( currentLocation.followedBy( to, 2 ) ) {
93 output << "\n\n" << indent;
94 currentLocation.linenumber += 2;
95 } else {
96 output << "\n# " << to.linenumber << " \"" << to.filename
97 << "\"\n" << indent;
98 currentLocation = to;
99 }
100 output << std::flush;
101 }
102
103 void CodeGenerator::updateLocation( BaseSyntaxNode const * to ) {
104 updateLocation( to->location );
105 }
106
107 void CodeGenerator::nextLine() {
108 if ( !lineMarks ) {
109 output << "\n" << indent << std::flush;
110 }
111 }
112
113 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 ) {}
114
115 string CodeGenerator::mangleName( DeclarationWithType * decl ) {
116 if ( pretty ) return decl->get_name();
117 if ( decl->get_mangleName() != "" ) {
118 // need to incorporate scope level in order to differentiate names for destructors
119 return decl->get_scopedMangleName();
120 } else {
121 return decl->get_name();
122 } // if
123 }
124
125 void CodeGenerator::genAttributes( list< Attribute * > & attributes ) {
126 if ( attributes.empty() ) return;
127 output << "__attribute__ ((";
128 for ( list< Attribute * >::iterator attr( attributes.begin() );; ) {
129 output << (*attr)->get_name();
130 if ( ! (*attr)->get_parameters().empty() ) {
131 output << "(";
132 genCommaList( (*attr)->get_parameters().begin(), (*attr)->get_parameters().end() );
133 output << ")";
134 } // if
135 if ( ++attr == attributes.end() ) break;
136 output << ","; // separator
137 } // for
138 output << ")) ";
139 } // CodeGenerator::genAttributes
140
141
142 // *** Declarations
143 void CodeGenerator::visit( FunctionDecl * functionDecl ) {
144 extension( functionDecl );
145 genAttributes( functionDecl->get_attributes() );
146
147 handleStorageClass( functionDecl );
148 functionDecl->get_funcSpec().print( output );
149
150 output << genType( functionDecl->get_functionType(), mangleName( functionDecl ), pretty, genC );
151
152 asmName( functionDecl );
153
154 // acceptAll( functionDecl->get_oldDecls(), *this );
155 if ( functionDecl->get_statements() ) {
156 functionDecl->get_statements()->accept( *this );
157 } // if
158 }
159
160 void CodeGenerator::visit( ObjectDecl * objectDecl ) {
161 if (objectDecl->get_name().empty() && genC ) {
162 // only generate an anonymous name when generating C code, otherwise it clutters the output too much
163 static UniqueName name = { "__anonymous_object" };
164 objectDecl->set_name( name.newName() );
165 }
166
167 extension( objectDecl );
168 genAttributes( objectDecl->get_attributes() );
169
170 handleStorageClass( objectDecl );
171 output << genType( objectDecl->get_type(), mangleName( objectDecl ), pretty, genC );
172
173 asmName( objectDecl );
174
175 if ( objectDecl->get_init() ) {
176 output << " = ";
177 objectDecl->get_init()->accept( *this );
178 } // if
179
180 if ( objectDecl->get_bitfieldWidth() ) {
181 output << ":";
182 objectDecl->get_bitfieldWidth()->accept( *this );
183 } // if
184 }
185
186 void CodeGenerator::handleAggregate( AggregateDecl * aggDecl, const std::string & kind ) {
187 genAttributes( aggDecl->get_attributes() );
188
189 if( ! aggDecl->get_parameters().empty() && ! genC ) {
190 // assertf( ! genC, "Aggregate type parameters should not reach code generation." );
191 output << "forall(";
192 genCommaList( aggDecl->get_parameters().begin(), aggDecl->get_parameters().end() );
193 output << ")" << endl;
194 output << indent;
195 }
196
197 output << kind << aggDecl->get_name();
198
199 if ( aggDecl->has_body() ) {
200 std::list< Declaration * > & memb = aggDecl->get_members();
201 output << " {" << endl;
202
203 ++indent;
204 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++ ) {
205 updateLocation( *i );
206 output << indent;
207 (*i)->accept( *this );
208 output << ";" << endl;
209 } // for
210
211 --indent;
212
213 output << indent << "}";
214 } // if
215 }
216
217 void CodeGenerator::visit( StructDecl * structDecl ) {
218 extension( structDecl );
219 handleAggregate( structDecl, "struct " );
220 }
221
222 void CodeGenerator::visit( UnionDecl * unionDecl ) {
223 extension( unionDecl );
224 handleAggregate( unionDecl, "union " );
225 }
226
227 void CodeGenerator::visit( EnumDecl * enumDecl ) {
228 extension( enumDecl );
229 updateLocation( enumDecl );
230 output << "enum ";
231 genAttributes( enumDecl->get_attributes() );
232
233 output << enumDecl->get_name();
234
235 std::list< Declaration* > &memb = enumDecl->get_members();
236
237 if ( ! memb.empty() ) {
238 output << " {" << endl;
239
240 ++indent;
241 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) {
242 ObjectDecl * obj = dynamic_cast< ObjectDecl* >( *i );
243 assert( obj );
244 updateLocation( obj );
245 output << indent << mangleName( obj );
246 if ( obj->get_init() ) {
247 output << " = ";
248 obj->get_init()->accept( *this );
249 } // if
250 output << "," << endl;
251 } // for
252
253 --indent;
254
255 output << indent << "}";
256 } // if
257 }
258
259 void CodeGenerator::visit( TraitDecl * traitDecl ) {
260 assertf( ! genC, "TraitDecls should not reach code generation." );
261 extension( traitDecl );
262 handleAggregate( traitDecl, "trait " );
263 }
264
265 void CodeGenerator::visit( TypedefDecl * typeDecl ) {
266 assertf( ! genC, "Typedefs are removed and substituted in earlier passes." );
267 updateLocation( typeDecl );
268 output << "typedef ";
269 output << genType( typeDecl->get_base(), typeDecl->get_name(), pretty, genC ) << endl;
270 }
271
272 void CodeGenerator::visit( TypeDecl * typeDecl ) {
273 assertf( ! genC, "TypeDecls should not reach code generation." );
274 output << typeDecl->genTypeString() << " " << typeDecl->get_name();
275 if ( typeDecl->get_kind() != TypeDecl::Any && typeDecl->get_sized() ) {
276 output << " | sized(" << typeDecl->get_name() << ")";
277 }
278 if ( ! typeDecl->get_assertions().empty() ) {
279 output << " | { ";
280 genCommaList( typeDecl->get_assertions().begin(), typeDecl->get_assertions().end() );
281 output << " }";
282 }
283 }
284
285 void CodeGenerator::visit( Designation * designation ) {
286 std::list< Expression * > designators = designation->get_designators();
287 if ( designators.size() == 0 ) return;
288 for ( Expression * des : designators ) {
289 if ( dynamic_cast< NameExpr * >( des ) || dynamic_cast< VariableExpr * >( des ) ) {
290 // if expression is a NameExpr or VariableExpr, then initializing aggregate member
291 output << ".";
292 des->accept( *this );
293 } else {
294 // otherwise, it has to be a ConstantExpr or CastExpr, initializing array eleemnt
295 output << "[";
296 des->accept( *this );
297 output << "]";
298 } // if
299 } // for
300 output << " = ";
301 }
302
303 void CodeGenerator::visit( SingleInit * init ) {
304 init->get_value()->accept( *this );
305 }
306
307 void CodeGenerator::visit( ListInit * init ) {
308 auto initBegin = init->begin();
309 auto initEnd = init->end();
310 auto desigBegin = init->get_designations().begin();
311 auto desigEnd = init->get_designations().end();
312
313 output << "{ ";
314 for ( ; initBegin != initEnd && desigBegin != desigEnd; ) {
315 (*desigBegin)->accept( *this );
316 (*initBegin)->accept( *this );
317 ++initBegin, ++desigBegin;
318 if ( initBegin != initEnd ) {
319 output << ", ";
320 }
321 }
322 output << " }";
323 assertf( initBegin == initEnd && desigBegin == desigEnd, "Initializers and designators not the same length. %s", toString( init ).c_str() );
324 }
325
326 void CodeGenerator::visit( __attribute__((unused)) ConstructorInit * init ){
327 assertf( ! genC, "ConstructorInit nodes should not reach code generation." );
328 // pseudo-output for constructor/destructor pairs
329 output << "<ctorinit>{" << std::endl << ++indent << "ctor: ";
330 maybeAccept( init->get_ctor(), *this );
331 output << ", " << std::endl << indent << "dtor: ";
332 maybeAccept( init->get_dtor(), *this );
333 output << std::endl << --indent << "}";
334 }
335
336 void CodeGenerator::visit( Constant * constant ) {
337 output << constant->get_value() ;
338 }
339
340 // *** Expressions
341 void CodeGenerator::visit( ApplicationExpr * applicationExpr ) {
342 extension( applicationExpr );
343 if ( VariableExpr * varExpr = dynamic_cast< VariableExpr* >( applicationExpr->get_function() ) ) {
344 OperatorInfo opInfo;
345 if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( varExpr->get_var()->get_name(), opInfo ) ) {
346 std::list< Expression* >::iterator arg = applicationExpr->get_args().begin();
347 switch ( opInfo.type ) {
348 case OT_INDEX:
349 assert( applicationExpr->get_args().size() == 2 );
350 (*arg++)->accept( *this );
351 output << "[";
352 (*arg)->accept( *this );
353 output << "]";
354 break;
355
356 case OT_CALL:
357 // there are no intrinsic definitions of the function call operator
358 assert( false );
359 break;
360
361 case OT_CTOR:
362 case OT_DTOR:
363 if ( applicationExpr->get_args().size() == 1 ) {
364 // the expression fed into a single parameter constructor or destructor may contain side
365 // effects, so must still output this expression
366 output << "(";
367 (*arg++)->accept( *this );
368 output << ") /* " << opInfo.inputName << " */";
369 } else if ( applicationExpr->get_args().size() == 2 ) {
370 // intrinsic two parameter constructors are essentially bitwise assignment
371 output << "(";
372 (*arg++)->accept( *this );
373 output << opInfo.symbol;
374 (*arg)->accept( *this );
375 output << ") /* " << opInfo.inputName << " */";
376 } else {
377 // no constructors with 0 or more than 2 parameters
378 assert( false );
379 } // if
380 break;
381
382 case OT_PREFIX:
383 case OT_PREFIXASSIGN:
384 assert( applicationExpr->get_args().size() == 1 );
385 output << "(";
386 output << opInfo.symbol;
387 (*arg)->accept( *this );
388 output << ")";
389 break;
390
391 case OT_POSTFIX:
392 case OT_POSTFIXASSIGN:
393 assert( applicationExpr->get_args().size() == 1 );
394 (*arg)->accept( *this );
395 output << opInfo.symbol;
396 break;
397
398
399 case OT_INFIX:
400 case OT_INFIXASSIGN:
401 assert( applicationExpr->get_args().size() == 2 );
402 output << "(";
403 (*arg++)->accept( *this );
404 output << opInfo.symbol;
405 (*arg)->accept( *this );
406 output << ")";
407 break;
408
409 case OT_CONSTANT:
410 case OT_LABELADDRESS:
411 // there are no intrinsic definitions of 0/1 or label addresses as functions
412 assert( false );
413 } // switch
414 } else {
415 varExpr->accept( *this );
416 output << "(";
417 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
418 output << ")";
419 } // if
420 } else {
421 applicationExpr->get_function()->accept( *this );
422 output << "(";
423 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
424 output << ")";
425 } // if
426 }
427
428 void CodeGenerator::visit( UntypedExpr * untypedExpr ) {
429 extension( untypedExpr );
430 if ( NameExpr * nameExpr = dynamic_cast< NameExpr* >( untypedExpr->get_function() ) ) {
431 OperatorInfo opInfo;
432 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
433 std::list< Expression* >::iterator arg = untypedExpr->get_args().begin();
434 switch ( opInfo.type ) {
435 case OT_INDEX:
436 assert( untypedExpr->get_args().size() == 2 );
437 (*arg++)->accept( *this );
438 output << "[";
439 (*arg)->accept( *this );
440 output << "]";
441 break;
442
443 case OT_CALL:
444 assert( false );
445
446 case OT_CTOR:
447 case OT_DTOR:
448 if ( untypedExpr->get_args().size() == 1 ) {
449 // the expression fed into a single parameter constructor or destructor may contain side
450 // effects, so must still output this expression
451 output << "(";
452 (*arg++)->accept( *this );
453 output << ") /* " << opInfo.inputName << " */";
454 } else if ( untypedExpr->get_args().size() == 2 ) {
455 // intrinsic two parameter constructors are essentially bitwise assignment
456 output << "(";
457 (*arg++)->accept( *this );
458 output << opInfo.symbol;
459 (*arg)->accept( *this );
460 output << ") /* " << opInfo.inputName << " */";
461 } else {
462 // no constructors with 0 or more than 2 parameters
463 assert( false );
464 } // if
465 break;
466
467 case OT_PREFIX:
468 case OT_PREFIXASSIGN:
469 case OT_LABELADDRESS:
470 assert( untypedExpr->get_args().size() == 1 );
471 output << "(";
472 output << opInfo.symbol;
473 (*arg)->accept( *this );
474 output << ")";
475 break;
476
477 case OT_POSTFIX:
478 case OT_POSTFIXASSIGN:
479 assert( untypedExpr->get_args().size() == 1 );
480 (*arg)->accept( *this );
481 output << opInfo.symbol;
482 break;
483
484 case OT_INFIX:
485 case OT_INFIXASSIGN:
486 assert( untypedExpr->get_args().size() == 2 );
487 output << "(";
488 (*arg++)->accept( *this );
489 output << opInfo.symbol;
490 (*arg)->accept( *this );
491 output << ")";
492 break;
493
494 case OT_CONSTANT:
495 // there are no intrinsic definitions of 0 or 1 as functions
496 assert( false );
497 } // switch
498 } else {
499 if ( nameExpr->get_name() == "..." ) { // case V1 ... V2 or case V1~V2
500 assert( untypedExpr->get_args().size() == 2 );
501 (*untypedExpr->get_args().begin())->accept( *this );
502 output << " ... ";
503 (*--untypedExpr->get_args().end())->accept( *this );
504 } else { // builtin routines
505 nameExpr->accept( *this );
506 output << "(";
507 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
508 output << ")";
509 } // if
510 } // if
511 } else {
512 untypedExpr->get_function()->accept( *this );
513 output << "(";
514 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
515 output << ")";
516 } // if
517 }
518
519 void CodeGenerator::visit( RangeExpr * rangeExpr ) {
520 rangeExpr->get_low()->accept( *this );
521 output << " ... ";
522 rangeExpr->get_high()->accept( *this );
523 }
524
525 void CodeGenerator::visit( NameExpr * nameExpr ) {
526 extension( nameExpr );
527 OperatorInfo opInfo;
528 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
529 assert( opInfo.type == OT_CONSTANT );
530 output << opInfo.symbol;
531 } else {
532 output << nameExpr->get_name();
533 } // if
534 }
535
536 void CodeGenerator::visit( AddressExpr * addressExpr ) {
537 extension( addressExpr );
538 output << "(&";
539 addressExpr->arg->accept( *this );
540 output << ")";
541 }
542
543 void CodeGenerator::visit( LabelAddressExpr *addressExpr ) {
544 extension( addressExpr );
545 output << "(&&" << addressExpr->arg << ")";
546 }
547
548 void CodeGenerator::visit( CastExpr * castExpr ) {
549 extension( castExpr );
550 output << "(";
551 if ( castExpr->get_result()->isVoid() ) {
552 output << "(void)" ;
553 } else {
554 // at least one result type of cast.
555 // Note: previously, lvalue casts were skipped. Since it's now impossible for the user to write
556 // an lvalue cast, this has been taken out.
557 output << "(";
558 output << genType( castExpr->get_result(), "", pretty, genC );
559 output << ")";
560 } // if
561 castExpr->get_arg()->accept( *this );
562 output << ")";
563 }
564
565 void CodeGenerator::visit( VirtualCastExpr * castExpr ) {
566 assertf( ! genC, "VirtualCastExpr should not reach code generation." );
567 extension( castExpr );
568 output << "(virtual ";
569 castExpr->get_arg()->accept( *this );
570 output << ")";
571 }
572
573 void CodeGenerator::visit( UntypedMemberExpr * memberExpr ) {
574 assertf( ! genC, "UntypedMemberExpr should not reach code generation." );
575 extension( memberExpr );
576 memberExpr->get_aggregate()->accept( *this );
577 output << ".";
578 memberExpr->get_member()->accept( *this );
579 }
580
581 void CodeGenerator::visit( MemberExpr * memberExpr ) {
582 extension( memberExpr );
583 memberExpr->get_aggregate()->accept( *this );
584 output << "." << mangleName( memberExpr->get_member() );
585 }
586
587 void CodeGenerator::visit( VariableExpr * variableExpr ) {
588 extension( variableExpr );
589 OperatorInfo opInfo;
590 if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) {
591 output << opInfo.symbol;
592 } else {
593 output << mangleName( variableExpr->get_var() );
594 } // if
595 }
596
597 void CodeGenerator::visit( ConstantExpr * constantExpr ) {
598 assert( constantExpr->get_constant() );
599 extension( constantExpr );
600 constantExpr->get_constant()->accept( *this );
601 }
602
603 void CodeGenerator::visit( SizeofExpr * sizeofExpr ) {
604 extension( sizeofExpr );
605 output << "sizeof(";
606 if ( sizeofExpr->get_isType() ) {
607 output << genType( sizeofExpr->get_type(), "", pretty, genC );
608 } else {
609 sizeofExpr->get_expr()->accept( *this );
610 } // if
611 output << ")";
612 }
613
614 void CodeGenerator::visit( AlignofExpr * alignofExpr ) {
615 // use GCC extension to avoid bumping std to C11
616 extension( alignofExpr );
617 output << "__alignof__(";
618 if ( alignofExpr->get_isType() ) {
619 output << genType( alignofExpr->get_type(), "", pretty, genC );
620 } else {
621 alignofExpr->get_expr()->accept( *this );
622 } // if
623 output << ")";
624 }
625
626 void CodeGenerator::visit( UntypedOffsetofExpr * offsetofExpr ) {
627 assertf( ! genC, "UntypedOffsetofExpr should not reach code generation." );
628 output << "offsetof(";
629 output << genType( offsetofExpr->get_type(), "", pretty, genC );
630 output << ", " << offsetofExpr->get_member();
631 output << ")";
632 }
633
634 void CodeGenerator::visit( OffsetofExpr * offsetofExpr ) {
635 // use GCC builtin
636 output << "__builtin_offsetof(";
637 output << genType( offsetofExpr->get_type(), "", pretty, genC );
638 output << ", " << mangleName( offsetofExpr->get_member() );
639 output << ")";
640 }
641
642 void CodeGenerator::visit( OffsetPackExpr * offsetPackExpr ) {
643 assertf( ! genC, "OffsetPackExpr should not reach code generation." );
644 output << "__CFA_offsetpack(" << genType( offsetPackExpr->get_type(), "", pretty, genC ) << ")";
645 }
646
647 void CodeGenerator::visit( LogicalExpr * logicalExpr ) {
648 extension( logicalExpr );
649 output << "(";
650 logicalExpr->get_arg1()->accept( *this );
651 if ( logicalExpr->get_isAnd() ) {
652 output << " && ";
653 } else {
654 output << " || ";
655 } // if
656 logicalExpr->get_arg2()->accept( *this );
657 output << ")";
658 }
659
660 void CodeGenerator::visit( ConditionalExpr * conditionalExpr ) {
661 extension( conditionalExpr );
662 output << "(";
663 conditionalExpr->get_arg1()->accept( *this );
664 output << " ? ";
665 conditionalExpr->get_arg2()->accept( *this );
666 output << " : ";
667 conditionalExpr->get_arg3()->accept( *this );
668 output << ")";
669 }
670
671 void CodeGenerator::visit( CommaExpr * commaExpr ) {
672 extension( commaExpr );
673 output << "(";
674 if ( genC ) {
675 // arg1 of a CommaExpr is never used, so it can be safely cast to void to reduce gcc warnings.
676 commaExpr->set_arg1( new CastExpr( commaExpr->get_arg1() ) );
677 }
678 commaExpr->get_arg1()->accept( *this );
679 output << " , ";
680 commaExpr->get_arg2()->accept( *this );
681 output << ")";
682 }
683
684 void CodeGenerator::visit( TupleAssignExpr * tupleExpr ) {
685 assertf( ! genC, "TupleAssignExpr should not reach code generation." );
686 tupleExpr->stmtExpr->accept( *this );
687 }
688
689 void CodeGenerator::visit( UntypedTupleExpr * tupleExpr ) {
690 assertf( ! genC, "UntypedTupleExpr should not reach code generation." );
691 extension( tupleExpr );
692 output << "[";
693 genCommaList( tupleExpr->get_exprs().begin(), tupleExpr->get_exprs().end() );
694 output << "]";
695 }
696
697 void CodeGenerator::visit( TupleExpr * tupleExpr ) {
698 assertf( ! genC, "TupleExpr should not reach code generation." );
699 extension( tupleExpr );
700 output << "[";
701 genCommaList( tupleExpr->get_exprs().begin(), tupleExpr->get_exprs().end() );
702 output << "]";
703 }
704
705 void CodeGenerator::visit( TupleIndexExpr * tupleExpr ) {
706 assertf( ! genC, "TupleIndexExpr should not reach code generation." );
707 extension( tupleExpr );
708 tupleExpr->get_tuple()->accept( *this );
709 output << "." << tupleExpr->get_index();
710 }
711
712 void CodeGenerator::visit( TypeExpr * typeExpr ) {
713 // if ( genC ) std::cerr << "typeexpr still exists: " << typeExpr << std::endl;
714 // assertf( ! genC, "TypeExpr should not reach code generation." );
715 if ( ! genC ) {
716 output<< genType( typeExpr->get_type(), "", pretty, genC );
717 }
718 }
719
720 void CodeGenerator::visit( AsmExpr * asmExpr ) {
721 if ( asmExpr->get_inout() ) {
722 output << "[ ";
723 asmExpr->get_inout()->accept( *this );
724 output << " ] ";
725 } // if
726 asmExpr->get_constraint()->accept( *this );
727 output << " ( ";
728 asmExpr->get_operand()->accept( *this );
729 output << " )";
730 }
731
732 void CodeGenerator::visit( CompoundLiteralExpr *compLitExpr ) {
733 assert( compLitExpr->get_result() && dynamic_cast< ListInit * > ( compLitExpr->get_initializer() ) );
734 output << "(" << genType( compLitExpr->get_result(), "", pretty, genC ) << ")";
735 compLitExpr->get_initializer()->accept( *this );
736 }
737
738 void CodeGenerator::visit( UniqueExpr * unqExpr ) {
739 assertf( ! genC, "Unique expressions should not reach code generation." );
740 output << "unq<" << unqExpr->get_id() << ">{ ";
741 unqExpr->get_expr()->accept( *this );
742 output << " }";
743 }
744
745 void CodeGenerator::visit( StmtExpr * stmtExpr ) {
746 std::list< Statement * > & stmts = stmtExpr->get_statements()->get_kids();
747 updateLocation( stmtExpr );
748 output << "({" << std::endl;
749 ++indent;
750 unsigned int numStmts = stmts.size();
751 unsigned int i = 0;
752 for ( Statement * stmt : stmts ) {
753 updateLocation( stmt );
754 output << indent << printLabels( stmt->get_labels() );
755 if ( i+1 == numStmts ) {
756 // last statement in a statement expression needs to be handled specially -
757 // cannot cast to void, otherwise the expression statement has no value
758 if ( ExprStmt * exprStmt = dynamic_cast< ExprStmt * >( stmt ) ) {
759 exprStmt->get_expr()->accept( *this );
760 output << ";" << endl;
761 ++i;
762 break;
763 }
764 }
765 stmt->accept( *this );
766 output << endl;
767 if ( wantSpacing( stmt ) ) {
768 output << endl;
769 } // if
770 ++i;
771 }
772 --indent;
773 output << indent << "})";
774 }
775
776 // *** Statements
777 void CodeGenerator::visit( CompoundStmt * compoundStmt ) {
778 std::list<Statement*> ks = compoundStmt->get_kids();
779 output << "{" << endl;
780
781 ++indent;
782
783 for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) {
784 output << indent << printLabels( (*i)->get_labels() );
785 (*i)->accept( *this );
786
787 output << endl;
788 if ( wantSpacing( *i ) ) {
789 output << endl;
790 } // if
791 } // for
792 --indent;
793
794 output << indent << "}";
795 }
796
797 void CodeGenerator::visit( ExprStmt * exprStmt ) {
798 assert( exprStmt );
799 if ( genC ) {
800 // cast the top-level expression to void to reduce gcc warnings.
801 exprStmt->set_expr( new CastExpr( exprStmt->get_expr() ) );
802 }
803 exprStmt->get_expr()->accept( *this );
804 output << ";";
805 }
806
807 void CodeGenerator::visit( AsmStmt * asmStmt ) {
808 output << "asm ";
809 if ( asmStmt->get_voltile() ) output << "volatile ";
810 if ( ! asmStmt->get_gotolabels().empty() ) output << "goto ";
811 output << "( ";
812 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
813 output << " : ";
814 genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() );
815 output << " : ";
816 genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() );
817 output << " : ";
818 genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() );
819 if ( ! asmStmt->get_gotolabels().empty() ) {
820 output << " : ";
821 for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) {
822 output << *begin++;
823 if ( begin == asmStmt->get_gotolabels().end() ) break;
824 output << ", ";
825 } // for
826 } // if
827 output << " );" ;
828 }
829
830 void CodeGenerator::visit( AsmDecl * asmDecl ) {
831 output << "asm ";
832 AsmStmt * asmStmt = asmDecl->get_stmt();
833 output << "( ";
834 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
835 output << " )" ;
836 }
837
838 void CodeGenerator::visit( IfStmt * ifStmt ) {
839 updateLocation( ifStmt );
840 output << "if ( ";
841 ifStmt->get_condition()->accept( *this );
842 output << " ) ";
843
844 ifStmt->get_thenPart()->accept( *this );
845
846 if ( ifStmt->get_elsePart() != 0) {
847 output << " else ";
848 ifStmt->get_elsePart()->accept( *this );
849 } // if
850 }
851
852 void CodeGenerator::visit( SwitchStmt * switchStmt ) {
853 updateLocation( switchStmt );
854 output << "switch ( " ;
855 switchStmt->get_condition()->accept( *this );
856 output << " ) ";
857
858 output << "{" << std::endl;
859 ++indent;
860 acceptAll( switchStmt->get_statements(), *this );
861 --indent;
862 output << indent << "}";
863 }
864
865 void CodeGenerator::visit( CaseStmt * caseStmt ) {
866 updateLocation( caseStmt );
867 if ( caseStmt->isDefault()) {
868 output << "default";
869 } else {
870 output << "case ";
871 caseStmt->get_condition()->accept( *this );
872 } // if
873 output << ":\n";
874
875 std::list<Statement *> sts = caseStmt->get_statements();
876
877 ++indent;
878 for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) {
879 output << indent << printLabels( (*i)->get_labels() ) ;
880 (*i)->accept( *this );
881 output << endl;
882 } // for
883 --indent;
884 }
885
886 void CodeGenerator::visit( BranchStmt * branchStmt ) {
887 switch ( branchStmt->get_type()) {
888 case BranchStmt::Goto:
889 if ( ! branchStmt->get_target().empty() )
890 output << "goto " << branchStmt->get_target();
891 else {
892 if ( branchStmt->get_computedTarget() != 0 ) {
893 output << "goto *";
894 branchStmt->get_computedTarget()->accept( *this );
895 } // if
896 } // if
897 break;
898 case BranchStmt::Break:
899 output << "break";
900 break;
901 case BranchStmt::Continue:
902 output << "continue";
903 break;
904 } // switch
905 output << ";";
906 }
907
908 void CodeGenerator::visit( ReturnStmt * returnStmt ) {
909 output << "return ";
910 maybeAccept( returnStmt->get_expr(), *this );
911 output << ";";
912 }
913
914 void CodeGenerator::visit( ThrowStmt * throwStmt ) {
915 assertf( ! genC, "Throw statements should not reach code generation." );
916
917 output << ((throwStmt->get_kind() == ThrowStmt::Terminate) ?
918 "throw" : "throwResume");
919 if (throwStmt->get_expr()) {
920 output << " ";
921 throwStmt->get_expr()->accept( *this );
922 }
923 if (throwStmt->get_target()) {
924 output << " _At ";
925 throwStmt->get_target()->accept( *this );
926 }
927 output << ";";
928 }
929
930 void CodeGenerator::visit( WhileStmt * whileStmt ) {
931 if ( whileStmt->get_isDoWhile() ) {
932 output << "do" ;
933 } else {
934 output << "while (" ;
935 whileStmt->get_condition()->accept( *this );
936 output << ")";
937 } // if
938 output << " ";
939
940 output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() );
941 whileStmt->get_body()->accept( *this );
942
943 output << indent;
944
945 if ( whileStmt->get_isDoWhile() ) {
946 output << " while (" ;
947 whileStmt->get_condition()->accept( *this );
948 output << ");";
949 } // if
950 }
951
952 void CodeGenerator::visit( ForStmt * forStmt ) {
953 // initialization is always hoisted, so don't bother doing anything with that
954 output << "for (;";
955
956 if ( forStmt->get_condition() != 0 ) {
957 forStmt->get_condition()->accept( *this );
958 } // if
959 output << ";";
960
961 if ( forStmt->get_increment() != 0 ) {
962 // cast the top-level expression to void to reduce gcc warnings.
963 Expression * expr = new CastExpr( forStmt->get_increment() );
964 expr->accept( *this );
965 } // if
966 output << ") ";
967
968 if ( forStmt->get_body() != 0 ) {
969 output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() );
970 forStmt->get_body()->accept( *this );
971 } // if
972 }
973
974 void CodeGenerator::visit( __attribute__((unused)) NullStmt * nullStmt ) {
975 //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() );
976 output << "/* null statement */ ;";
977 }
978
979 void CodeGenerator::visit( DeclStmt * declStmt ) {
980 declStmt->get_decl()->accept( *this );
981
982 if ( doSemicolon( declStmt->get_decl() ) ) {
983 output << ";";
984 } // if
985 }
986
987 void CodeGenerator::handleStorageClass( DeclarationWithType * decl ) {
988 if ( decl->get_storageClasses().any() ) {
989 decl->get_storageClasses().print( output );
990 } // if
991 } // CodeGenerator::handleStorageClass
992
993 std::string genName( DeclarationWithType * decl ) {
994 CodeGen::OperatorInfo opInfo;
995 if ( operatorLookup( decl->get_name(), opInfo ) ) {
996 return opInfo.outputName;
997 } else {
998 return decl->get_name();
999 } // if
1000 }
1001} // namespace CodeGen
1002
1003// Local Variables: //
1004// tab-width: 4 //
1005// mode: c++ //
1006// compile-command: "make install" //
1007// End: //
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