source: src/CodeGen/CodeGenerator.cc@ fc1ef62

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 fc1ef62 was 87e08e24, checked in by Rob Schluntz <rschlunt@…>, 8 years ago

Add missing indent prints in codegen
  • Property mode set to 100644
File size: 31.0 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 : Andrew Beach
12// Last Modified On : Fri Aug 18 15:34:00 2017
13// Update Count : 488
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 = 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;
198 if ( aggDecl->get_name() != "" )
199 output << aggDecl->get_name();
200
201 if ( aggDecl->has_body() ) {
202 std::list< Declaration * > & memb = aggDecl->get_members();
203 output << " {" << endl;
204
205 ++indent;
206 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++ ) {
207 updateLocation( *i );
208 output << indent;
209 (*i)->accept( *this );
210 output << ";" << endl;
211 } // for
212
213 --indent;
214
215 output << indent << "}";
216 } // if
217 }
218
219 void CodeGenerator::visit( StructDecl * structDecl ) {
220 extension( structDecl );
221 handleAggregate( structDecl, "struct " );
222 }
223
224 void CodeGenerator::visit( UnionDecl * unionDecl ) {
225 extension( unionDecl );
226 handleAggregate( unionDecl, "union " );
227 }
228
229 void CodeGenerator::visit( EnumDecl * enumDecl ) {
230 extension( enumDecl );
231 updateLocation( enumDecl );
232 output << "enum ";
233 genAttributes( enumDecl->get_attributes() );
234
235 if ( enumDecl->get_name() != "" )
236 output << enumDecl->get_name();
237
238 std::list< Declaration* > &memb = enumDecl->get_members();
239
240 if ( ! memb.empty() ) {
241 output << " {" << endl;
242
243 ++indent;
244 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) {
245 ObjectDecl * obj = dynamic_cast< ObjectDecl* >( *i );
246 assert( obj );
247 updateLocation( obj );
248 output << indent << mangleName( obj );
249 if ( obj->get_init() ) {
250 output << " = ";
251 obj->get_init()->accept( *this );
252 } // if
253 output << "," << endl;
254 } // for
255
256 --indent;
257
258 output << indent << "}";
259 } // if
260 }
261
262 void CodeGenerator::visit( __attribute__((unused)) TraitDecl * traitDecl ) {}
263
264 void CodeGenerator::visit( TypedefDecl * typeDecl ) {
265 assertf( ! genC, "Typedefs are removed and substituted in earlier passes." );
266 updateLocation( typeDecl );
267 output << "typedef ";
268 output << genType( typeDecl->get_base(), typeDecl->get_name(), pretty, genC ) << endl;
269 }
270
271 void CodeGenerator::visit( TypeDecl * typeDecl ) {
272 if ( genC ) {
273 // really, we should mutate this into something that isn't a TypeDecl but that requires large-scale changes,
274 // still to be done
275 extension( typeDecl );
276 output << "extern unsigned long " << typeDecl->get_name();
277 if ( typeDecl->get_base() ) {
278 output << " = sizeof( " << genType( typeDecl->get_base(), "", pretty, genC ) << " )";
279 } // if
280 } else {
281 output << typeDecl->genTypeString() << " " << typeDecl->get_name();
282 if ( typeDecl->get_kind() != TypeDecl::Any && typeDecl->get_sized() ) {
283 output << " | sized(" << typeDecl->get_name() << ")";
284 }
285 if ( ! typeDecl->get_assertions().empty() ) {
286 output << " | { ";
287 genCommaList( typeDecl->get_assertions().begin(), typeDecl->get_assertions().end() );
288 output << " }";
289 }
290 }
291 }
292
293 void CodeGenerator::visit( Designation * designation ) {
294 std::list< Expression * > designators = designation->get_designators();
295 if ( designators.size() == 0 ) return;
296 for ( Expression * des : designators ) {
297 if ( dynamic_cast< NameExpr * >( des ) || dynamic_cast< VariableExpr * >( des ) ) {
298 // if expression is a NameExpr or VariableExpr, then initializing aggregate member
299 output << ".";
300 des->accept( *this );
301 } else {
302 // otherwise, it has to be a ConstantExpr or CastExpr, initializing array eleemnt
303 output << "[";
304 des->accept( *this );
305 output << "]";
306 } // if
307 } // for
308 output << " = ";
309 }
310
311 void CodeGenerator::visit( SingleInit * init ) {
312 init->get_value()->accept( *this );
313 }
314
315 void CodeGenerator::visit( ListInit * init ) {
316 auto initBegin = init->begin();
317 auto initEnd = init->end();
318 auto desigBegin = init->get_designations().begin();
319 auto desigEnd = init->get_designations().end();
320
321 output << "{ ";
322 for ( ; initBegin != initEnd && desigBegin != desigEnd; ) {
323 (*desigBegin)->accept( *this );
324 (*initBegin)->accept( *this );
325 ++initBegin, ++desigBegin;
326 if ( initBegin != initEnd ) {
327 output << ", ";
328 }
329 }
330 output << " }";
331 assertf( initBegin == initEnd && desigBegin == desigEnd, "Initializers and designators not the same length. %s", toString( init ).c_str() );
332 }
333
334 void CodeGenerator::visit( __attribute__((unused)) ConstructorInit * init ){
335 assertf( ! genC, "ConstructorInit nodes should not reach code generation." );
336 // pseudo-output for constructor/destructor pairs
337 output << "<ctorinit>{" << std::endl << ++indent << "ctor: ";
338 maybeAccept( init->get_ctor(), *this );
339 output << ", " << std::endl << indent << "dtor: ";
340 maybeAccept( init->get_dtor(), *this );
341 output << std::endl << --indent << "}";
342 }
343
344 void CodeGenerator::visit( Constant * constant ) {
345 output << constant->get_value() ;
346 }
347
348 // *** Expressions
349 void CodeGenerator::visit( ApplicationExpr * applicationExpr ) {
350 extension( applicationExpr );
351 if ( VariableExpr * varExpr = dynamic_cast< VariableExpr* >( applicationExpr->get_function() ) ) {
352 OperatorInfo opInfo;
353 if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( varExpr->get_var()->get_name(), opInfo ) ) {
354 std::list< Expression* >::iterator arg = applicationExpr->get_args().begin();
355 switch ( opInfo.type ) {
356 case OT_INDEX:
357 assert( applicationExpr->get_args().size() == 2 );
358 (*arg++)->accept( *this );
359 output << "[";
360 (*arg)->accept( *this );
361 output << "]";
362 break;
363
364 case OT_CALL:
365 // there are no intrinsic definitions of the function call operator
366 assert( false );
367 break;
368
369 case OT_CTOR:
370 case OT_DTOR:
371 if ( applicationExpr->get_args().size() == 1 ) {
372 // the expression fed into a single parameter constructor or destructor may contain side
373 // effects, so must still output this expression
374 output << "(";
375 (*arg++)->accept( *this );
376 output << ") /* " << opInfo.inputName << " */";
377 } else if ( applicationExpr->get_args().size() == 2 ) {
378 // intrinsic two parameter constructors are essentially bitwise assignment
379 output << "(";
380 (*arg++)->accept( *this );
381 output << opInfo.symbol;
382 (*arg)->accept( *this );
383 output << ") /* " << opInfo.inputName << " */";
384 } else {
385 // no constructors with 0 or more than 2 parameters
386 assert( false );
387 } // if
388 break;
389
390 case OT_PREFIX:
391 case OT_PREFIXASSIGN:
392 assert( applicationExpr->get_args().size() == 1 );
393 output << "(";
394 output << opInfo.symbol;
395 (*arg)->accept( *this );
396 output << ")";
397 break;
398
399 case OT_POSTFIX:
400 case OT_POSTFIXASSIGN:
401 assert( applicationExpr->get_args().size() == 1 );
402 (*arg)->accept( *this );
403 output << opInfo.symbol;
404 break;
405
406
407 case OT_INFIX:
408 case OT_INFIXASSIGN:
409 assert( applicationExpr->get_args().size() == 2 );
410 output << "(";
411 (*arg++)->accept( *this );
412 output << opInfo.symbol;
413 (*arg)->accept( *this );
414 output << ")";
415 break;
416
417 case OT_CONSTANT:
418 case OT_LABELADDRESS:
419 // there are no intrinsic definitions of 0/1 or label addresses as functions
420 assert( false );
421 } // switch
422 } else {
423 varExpr->accept( *this );
424 output << "(";
425 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
426 output << ")";
427 } // if
428 } else {
429 applicationExpr->get_function()->accept( *this );
430 output << "(";
431 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
432 output << ")";
433 } // if
434 }
435
436 void CodeGenerator::visit( UntypedExpr * untypedExpr ) {
437 extension( untypedExpr );
438 if ( NameExpr * nameExpr = dynamic_cast< NameExpr* >( untypedExpr->get_function() ) ) {
439 OperatorInfo opInfo;
440 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
441 std::list< Expression* >::iterator arg = untypedExpr->get_args().begin();
442 switch ( opInfo.type ) {
443 case OT_INDEX:
444 assert( untypedExpr->get_args().size() == 2 );
445 (*arg++)->accept( *this );
446 output << "[";
447 (*arg)->accept( *this );
448 output << "]";
449 break;
450
451 case OT_CALL:
452 assert( false );
453
454 case OT_CTOR:
455 case OT_DTOR:
456 if ( untypedExpr->get_args().size() == 1 ) {
457 // the expression fed into a single parameter constructor or destructor may contain side
458 // effects, so must still output this expression
459 output << "(";
460 (*arg++)->accept( *this );
461 output << ") /* " << opInfo.inputName << " */";
462 } else if ( untypedExpr->get_args().size() == 2 ) {
463 // intrinsic two parameter constructors are essentially bitwise assignment
464 output << "(";
465 (*arg++)->accept( *this );
466 output << opInfo.symbol;
467 (*arg)->accept( *this );
468 output << ") /* " << opInfo.inputName << " */";
469 } else {
470 // no constructors with 0 or more than 2 parameters
471 assert( false );
472 } // if
473 break;
474
475 case OT_PREFIX:
476 case OT_PREFIXASSIGN:
477 case OT_LABELADDRESS:
478 assert( untypedExpr->get_args().size() == 1 );
479 output << "(";
480 output << opInfo.symbol;
481 (*arg)->accept( *this );
482 output << ")";
483 break;
484
485 case OT_POSTFIX:
486 case OT_POSTFIXASSIGN:
487 assert( untypedExpr->get_args().size() == 1 );
488 (*arg)->accept( *this );
489 output << opInfo.symbol;
490 break;
491
492 case OT_INFIX:
493 case OT_INFIXASSIGN:
494 assert( untypedExpr->get_args().size() == 2 );
495 output << "(";
496 (*arg++)->accept( *this );
497 output << opInfo.symbol;
498 (*arg)->accept( *this );
499 output << ")";
500 break;
501
502 case OT_CONSTANT:
503 // there are no intrinsic definitions of 0 or 1 as functions
504 assert( false );
505 } // switch
506 } else {
507 if ( nameExpr->get_name() == "..." ) { // case V1 ... V2 or case V1~V2
508 assert( untypedExpr->get_args().size() == 2 );
509 (*untypedExpr->get_args().begin())->accept( *this );
510 output << " ... ";
511 (*--untypedExpr->get_args().end())->accept( *this );
512 } else { // builtin routines
513 nameExpr->accept( *this );
514 output << "(";
515 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
516 output << ")";
517 } // if
518 } // if
519 } else {
520 untypedExpr->get_function()->accept( *this );
521 output << "(";
522 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
523 output << ")";
524 } // if
525 }
526
527 void CodeGenerator::visit( RangeExpr * rangeExpr ) {
528 rangeExpr->get_low()->accept( *this );
529 output << " ... ";
530 rangeExpr->get_high()->accept( *this );
531 }
532
533 void CodeGenerator::visit( NameExpr * nameExpr ) {
534 extension( nameExpr );
535 OperatorInfo opInfo;
536 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
537 assert( opInfo.type == OT_CONSTANT );
538 output << opInfo.symbol;
539 } else {
540 output << nameExpr->get_name();
541 } // if
542 }
543
544 void CodeGenerator::visit( AddressExpr * addressExpr ) {
545 extension( addressExpr );
546 output << "(&";
547 // this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address
548 if ( VariableExpr * variableExpr = dynamic_cast< VariableExpr* >( addressExpr->get_arg() ) ) {
549 output << mangleName( variableExpr->get_var() );
550 } else {
551 addressExpr->get_arg()->accept( *this );
552 } // if
553 output << ")";
554 }
555
556 void CodeGenerator::visit( CastExpr * castExpr ) {
557 extension( castExpr );
558 output << "(";
559 if ( castExpr->get_result()->isVoid() ) {
560 output << "(void)" ;
561 } else {
562 // at least one result type of cast.
563 // Note: previously, lvalue casts were skipped. Since it's now impossible for the user to write
564 // an lvalue cast, this has been taken out.
565 output << "(";
566 output << genType( castExpr->get_result(), "", pretty, genC );
567 output << ")";
568 } // if
569 castExpr->get_arg()->accept( *this );
570 output << ")";
571 }
572
573 void CodeGenerator::visit( VirtualCastExpr * castExpr ) {
574 assertf( ! genC, "VirtualCastExpr should not reach code generation." );
575 extension( castExpr );
576 output << "(virtual ";
577 castExpr->get_arg()->accept( *this );
578 output << ")";
579 }
580
581 void CodeGenerator::visit( UntypedMemberExpr * memberExpr ) {
582 assertf( ! genC, "UntypedMemberExpr should not reach code generation." );
583 extension( memberExpr );
584 memberExpr->get_aggregate()->accept( *this );
585 output << ".";
586 memberExpr->get_member()->accept( *this );
587 }
588
589 void CodeGenerator::visit( MemberExpr * memberExpr ) {
590 extension( memberExpr );
591 memberExpr->get_aggregate()->accept( *this );
592 output << "." << mangleName( memberExpr->get_member() );
593 }
594
595 void CodeGenerator::visit( VariableExpr * variableExpr ) {
596 extension( variableExpr );
597 OperatorInfo opInfo;
598 if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) {
599 output << opInfo.symbol;
600 } else {
601 output << mangleName( variableExpr->get_var() );
602 } // if
603 }
604
605 void CodeGenerator::visit( ConstantExpr * constantExpr ) {
606 assert( constantExpr->get_constant() );
607 extension( constantExpr );
608 constantExpr->get_constant()->accept( *this );
609 }
610
611 void CodeGenerator::visit( SizeofExpr * sizeofExpr ) {
612 extension( sizeofExpr );
613 output << "sizeof(";
614 if ( sizeofExpr->get_isType() ) {
615 output << genType( sizeofExpr->get_type(), "", pretty, genC );
616 } else {
617 sizeofExpr->get_expr()->accept( *this );
618 } // if
619 output << ")";
620 }
621
622 void CodeGenerator::visit( AlignofExpr * alignofExpr ) {
623 // use GCC extension to avoid bumping std to C11
624 extension( alignofExpr );
625 output << "__alignof__(";
626 if ( alignofExpr->get_isType() ) {
627 output << genType( alignofExpr->get_type(), "", pretty, genC );
628 } else {
629 alignofExpr->get_expr()->accept( *this );
630 } // if
631 output << ")";
632 }
633
634 void CodeGenerator::visit( UntypedOffsetofExpr * offsetofExpr ) {
635 assertf( ! genC, "UntypedOffsetofExpr should not reach code generation." );
636 output << "offsetof(";
637 output << genType( offsetofExpr->get_type(), "", pretty, genC );
638 output << ", " << offsetofExpr->get_member();
639 output << ")";
640 }
641
642 void CodeGenerator::visit( OffsetofExpr * offsetofExpr ) {
643 // use GCC builtin
644 output << "__builtin_offsetof(";
645 output << genType( offsetofExpr->get_type(), "", pretty, genC );
646 output << ", " << mangleName( offsetofExpr->get_member() );
647 output << ")";
648 }
649
650 void CodeGenerator::visit( OffsetPackExpr * offsetPackExpr ) {
651 assertf( ! genC, "OffsetPackExpr should not reach code generation." );
652 output << "__CFA_offsetpack(" << genType( offsetPackExpr->get_type(), "", pretty, genC ) << ")";
653 }
654
655 void CodeGenerator::visit( LogicalExpr * logicalExpr ) {
656 extension( logicalExpr );
657 output << "(";
658 logicalExpr->get_arg1()->accept( *this );
659 if ( logicalExpr->get_isAnd() ) {
660 output << " && ";
661 } else {
662 output << " || ";
663 } // if
664 logicalExpr->get_arg2()->accept( *this );
665 output << ")";
666 }
667
668 void CodeGenerator::visit( ConditionalExpr * conditionalExpr ) {
669 extension( conditionalExpr );
670 output << "(";
671 conditionalExpr->get_arg1()->accept( *this );
672 output << " ? ";
673 conditionalExpr->get_arg2()->accept( *this );
674 output << " : ";
675 conditionalExpr->get_arg3()->accept( *this );
676 output << ")";
677 }
678
679 void CodeGenerator::visit( CommaExpr * commaExpr ) {
680 extension( commaExpr );
681 output << "(";
682 if ( genC ) {
683 // arg1 of a CommaExpr is never used, so it can be safely cast to void to reduce gcc warnings.
684 commaExpr->set_arg1( new CastExpr( commaExpr->get_arg1() ) );
685 }
686 commaExpr->get_arg1()->accept( *this );
687 output << " , ";
688 commaExpr->get_arg2()->accept( *this );
689 output << ")";
690 }
691
692 void CodeGenerator::visit( TupleAssignExpr * tupleExpr ) {
693 assertf( ! genC, "TupleAssignExpr should not reach code generation." );
694 tupleExpr->stmtExpr->accept( *this );
695 }
696
697 void CodeGenerator::visit( UntypedTupleExpr * tupleExpr ) {
698 assertf( ! genC, "UntypedTupleExpr 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( TupleExpr * tupleExpr ) {
706 assertf( ! genC, "TupleExpr should not reach code generation." );
707 extension( tupleExpr );
708 output << "[";
709 genCommaList( tupleExpr->get_exprs().begin(), tupleExpr->get_exprs().end() );
710 output << "]";
711 }
712
713 void CodeGenerator::visit( TupleIndexExpr * tupleExpr ) {
714 assertf( ! genC, "TupleIndexExpr should not reach code generation." );
715 extension( tupleExpr );
716 tupleExpr->get_tuple()->accept( *this );
717 output << "." << tupleExpr->get_index();
718 }
719
720 void CodeGenerator::visit( TypeExpr * typeExpr ) {
721 // if ( genC ) std::cerr << "typeexpr still exists: " << typeExpr << std::endl;
722 // assertf( ! genC, "TypeExpr should not reach code generation." );
723 if ( ! genC ) {
724 output<< genType( typeExpr->get_type(), "", pretty, genC );
725 }
726 }
727
728 void CodeGenerator::visit( AsmExpr * asmExpr ) {
729 if ( asmExpr->get_inout() ) {
730 output << "[ ";
731 asmExpr->get_inout()->accept( *this );
732 output << " ] ";
733 } // if
734 asmExpr->get_constraint()->accept( *this );
735 output << " ( ";
736 asmExpr->get_operand()->accept( *this );
737 output << " )";
738 }
739
740 void CodeGenerator::visit( CompoundLiteralExpr *compLitExpr ) {
741 assert( compLitExpr->get_result() && dynamic_cast< ListInit * > ( compLitExpr->get_initializer() ) );
742 output << "(" << genType( compLitExpr->get_result(), "", pretty, genC ) << ")";
743 compLitExpr->get_initializer()->accept( *this );
744 }
745
746 void CodeGenerator::visit( UniqueExpr * unqExpr ) {
747 assertf( ! genC, "Unique expressions should not reach code generation." );
748 output << "unq<" << unqExpr->get_id() << ">{ ";
749 unqExpr->get_expr()->accept( *this );
750 output << " }";
751 }
752
753 void CodeGenerator::visit( StmtExpr * stmtExpr ) {
754 std::list< Statement * > & stmts = stmtExpr->get_statements()->get_kids();
755 updateLocation( stmtExpr );
756 output << "({" << std::endl;
757 ++indent;
758 unsigned int numStmts = stmts.size();
759 unsigned int i = 0;
760 for ( Statement * stmt : stmts ) {
761 updateLocation( stmt );
762 output << printLabels( stmt->get_labels() );
763 if ( i+1 == numStmts ) {
764 // last statement in a statement expression needs to be handled specially -
765 // cannot cast to void, otherwise the expression statement has no value
766 if ( ExprStmt * exprStmt = dynamic_cast< ExprStmt * >( stmt ) ) {
767 exprStmt->get_expr()->accept( *this );
768 output << ";" << endl;
769 ++i;
770 break;
771 }
772 }
773 stmt->accept( *this );
774 output << endl;
775 if ( wantSpacing( stmt ) ) {
776 output << endl;
777 } // if
778 ++i;
779 }
780 --indent;
781 output << indent << "})";
782 }
783
784 // *** Statements
785 void CodeGenerator::visit( CompoundStmt * compoundStmt ) {
786 std::list<Statement*> ks = compoundStmt->get_kids();
787 output << "{" << endl;
788
789 ++indent;
790
791 for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) {
792 output << indent << printLabels( (*i)->get_labels() );
793 (*i)->accept( *this );
794
795 output << endl;
796 if ( wantSpacing( *i ) ) {
797 output << endl;
798 } // if
799 } // for
800 --indent;
801
802 output << indent << "}";
803 }
804
805 void CodeGenerator::visit( ExprStmt * exprStmt ) {
806 assert( exprStmt );
807 if ( genC ) {
808 // cast the top-level expression to void to reduce gcc warnings.
809 exprStmt->set_expr( new CastExpr( exprStmt->get_expr() ) );
810 }
811 exprStmt->get_expr()->accept( *this );
812 output << ";";
813 }
814
815 void CodeGenerator::visit( AsmStmt * asmStmt ) {
816 output << "asm ";
817 if ( asmStmt->get_voltile() ) output << "volatile ";
818 if ( ! asmStmt->get_gotolabels().empty() ) output << "goto ";
819 output << "( ";
820 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
821 output << " : ";
822 genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() );
823 output << " : ";
824 genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() );
825 output << " : ";
826 genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() );
827 if ( ! asmStmt->get_gotolabels().empty() ) {
828 output << " : ";
829 for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) {
830 output << *begin++;
831 if ( begin == asmStmt->get_gotolabels().end() ) break;
832 output << ", ";
833 } // for
834 } // if
835 output << " );" ;
836 }
837
838 void CodeGenerator::visit( AsmDecl * asmDecl ) {
839 output << "asm ";
840 AsmStmt * asmStmt = asmDecl->get_stmt();
841 output << "( ";
842 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
843 output << " )" ;
844 }
845
846 void CodeGenerator::visit( IfStmt * ifStmt ) {
847 updateLocation( ifStmt );
848 output << "if ( ";
849 ifStmt->get_condition()->accept( *this );
850 output << " ) ";
851
852 ifStmt->get_thenPart()->accept( *this );
853
854 if ( ifStmt->get_elsePart() != 0) {
855 output << " else ";
856 ifStmt->get_elsePart()->accept( *this );
857 } // if
858 }
859
860 void CodeGenerator::visit( SwitchStmt * switchStmt ) {
861 updateLocation( switchStmt );
862 output << "switch ( " ;
863 switchStmt->get_condition()->accept( *this );
864 output << " ) ";
865
866 output << "{" << std::endl;
867 ++indent;
868 acceptAll( switchStmt->get_statements(), *this );
869 --indent;
870 output << indent << "}";
871 }
872
873 void CodeGenerator::visit( CaseStmt * caseStmt ) {
874 updateLocation( caseStmt );
875 if ( caseStmt->isDefault()) {
876 output << "default";
877 } else {
878 output << "case ";
879 caseStmt->get_condition()->accept( *this );
880 } // if
881 output << ":\n";
882
883 std::list<Statement *> sts = caseStmt->get_statements();
884
885 ++indent;
886 for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) {
887 output << indent << printLabels( (*i)->get_labels() ) ;
888 (*i)->accept( *this );
889 output << endl;
890 } // for
891 --indent;
892 }
893
894 void CodeGenerator::visit( BranchStmt * branchStmt ) {
895 switch ( branchStmt->get_type()) {
896 case BranchStmt::Goto:
897 if ( ! branchStmt->get_target().empty() )
898 output << "goto " << branchStmt->get_target();
899 else {
900 if ( branchStmt->get_computedTarget() != 0 ) {
901 output << "goto *";
902 branchStmt->get_computedTarget()->accept( *this );
903 } // if
904 } // if
905 break;
906 case BranchStmt::Break:
907 output << "break";
908 break;
909 case BranchStmt::Continue:
910 output << "continue";
911 break;
912 } // switch
913 output << ";";
914 }
915
916 void CodeGenerator::visit( ReturnStmt * returnStmt ) {
917 output << "return ";
918 maybeAccept( returnStmt->get_expr(), *this );
919 output << ";";
920 }
921
922 void CodeGenerator::visit( ThrowStmt * throwStmt ) {
923 assertf( ! genC, "Throw statements should not reach code generation." );
924
925 output << ((throwStmt->get_kind() == ThrowStmt::Terminate) ?
926 "throw" : "throwResume");
927 if (throwStmt->get_expr()) {
928 output << " ";
929 throwStmt->get_expr()->accept( *this );
930 }
931 if (throwStmt->get_target()) {
932 output << " _At ";
933 throwStmt->get_target()->accept( *this );
934 }
935 output << ";";
936 }
937
938 void CodeGenerator::visit( WhileStmt * whileStmt ) {
939 if ( whileStmt->get_isDoWhile() ) {
940 output << "do" ;
941 } else {
942 output << "while (" ;
943 whileStmt->get_condition()->accept( *this );
944 output << ")";
945 } // if
946 output << " ";
947
948 output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() );
949 whileStmt->get_body()->accept( *this );
950
951 output << indent;
952
953 if ( whileStmt->get_isDoWhile() ) {
954 output << " while (" ;
955 whileStmt->get_condition()->accept( *this );
956 output << ");";
957 } // if
958 }
959
960 void CodeGenerator::visit( ForStmt * forStmt ) {
961 // initialization is always hoisted, so don't bother doing anything with that
962 output << "for (;";
963
964 if ( forStmt->get_condition() != 0 ) {
965 forStmt->get_condition()->accept( *this );
966 } // if
967 output << ";";
968
969 if ( forStmt->get_increment() != 0 ) {
970 // cast the top-level expression to void to reduce gcc warnings.
971 Expression * expr = new CastExpr( forStmt->get_increment() );
972 expr->accept( *this );
973 } // if
974 output << ") ";
975
976 if ( forStmt->get_body() != 0 ) {
977 output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() );
978 forStmt->get_body()->accept( *this );
979 } // if
980 }
981
982 void CodeGenerator::visit( __attribute__((unused)) NullStmt * nullStmt ) {
983 //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() );
984 output << "/* null statement */ ;";
985 }
986
987 void CodeGenerator::visit( DeclStmt * declStmt ) {
988 declStmt->get_decl()->accept( *this );
989
990 if ( doSemicolon( declStmt->get_decl() ) ) {
991 output << ";";
992 } // if
993 }
994
995 void CodeGenerator::handleStorageClass( DeclarationWithType * decl ) {
996 if ( decl->get_storageClasses().any() ) {
997 decl->get_storageClasses().print( output );
998 } // if
999 } // CodeGenerator::handleStorageClass
1000
1001 std::string genName( DeclarationWithType * decl ) {
1002 CodeGen::OperatorInfo opInfo;
1003 if ( operatorLookup( decl->get_name(), opInfo ) ) {
1004 return opInfo.outputName;
1005 } else {
1006 return decl->get_name();
1007 } // if
1008 }
1009} // namespace CodeGen
1010
1011// Local Variables: //
1012// tab-width: 4 //
1013// mode: c++ //
1014// compile-command: "make install" //
1015// End: //
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