source: src/CodeGen/CodeGenerator2.cc@ 2bae7307

ADT aaron-thesis arm-eh ast-experimental cleanup-dtors ctor deferred_resn demangler enum forall-pointer-decay gc_noraii jacob/cs343-translation jenkins-sandbox memory new-ast new-ast-unique-expr new-env no_list persistent-indexer pthread-emulation qualifiedEnum resolv-new string with_gc
Last change on this file since 2bae7307 was f38c8d9, checked in by Peter A. Buhr <pabuhr@…>, 10 years ago

print storage-class inline, remove builtins.def
  • Property mode set to 100644
File size: 18.2 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// CodeGenerator2.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 May 24 20:43:16 2015
13// Update Count : 11
14//
15
16#include <algorithm>
17#include <iostream>
18#include <cassert>
19#include <list>
20
21#include "SynTree/Type.h"
22#include "SynTree/Declaration.h"
23#include "SynTree/Statement.h"
24#include "SynTree/Expression.h"
25#include "SynTree/Initializer.h"
26
27#include "utility.h"
28#include "UnimplementedError.h"
29
30#include "CodeGenerator2.h"
31#include "OperatorTable.h"
32#include "GenType.h"
33
34using namespace std;
35
36namespace CodeGen {
37 int CodeGenerator2::tabsize = 4;
38
39 CodeGenerator2::CodeGenerator2( std::ostream &os ) : cur_indent( 0 ), insideFunction( false ), before( os ), after() { }
40
41 CodeGenerator2::CodeGenerator2( std::ostream &os, std::string init, int indent, bool infunp )
42 : cur_indent( indent ), insideFunction( infunp ), before( os ) {
43 //before << std::string( init );
44 }
45
46 CodeGenerator2::CodeGenerator2( std::ostream &os, char *init, int indent, bool infunp )
47 : cur_indent( indent ), insideFunction( infunp ), before( os ) {
48 //before << std::string( init );
49 }
50
51 string mangleName( DeclarationWithType *decl ) {
52 if ( decl->get_mangleName() != "" ) {
53 return decl->get_mangleName();
54 } else {
55 return decl->get_name();
56 } // if
57 }
58
59 //*** Declarations
60 void CodeGenerator2::visit( FunctionDecl *functionDecl ) {
61 handleStorageClass( functionDecl );
62 if ( functionDecl->get_isInline() ) {
63 before << "inline ";
64 } // if
65 before << genType( functionDecl->get_functionType(), mangleName( functionDecl ) );
66
67 // how to get this to the Functype?
68 std::list< Declaration * > olds = functionDecl->get_oldDecls();
69 if ( ! olds.empty() ) {
70 before << " /* function has old declaration */";
71 } // if
72
73 // acceptAll( functionDecl->get_oldDecls(), *this );
74 if ( functionDecl->get_statements() ) {
75 functionDecl->get_statements()->accept(*this );
76 } // if
77 }
78
79 void CodeGenerator2::visit( ObjectDecl *objectDecl ) {
80 handleStorageClass( objectDecl );
81 before << genType( objectDecl->get_type(), mangleName( objectDecl ) );
82
83 if ( objectDecl->get_init() ) {
84 before << " = ";
85 objectDecl->get_init()->accept( *this );
86 } // if
87 if ( objectDecl->get_bitfieldWidth() ) {
88 before << ":";
89 objectDecl->get_bitfieldWidth()->accept( *this );
90 } // if
91 }
92
93 void CodeGenerator2::handleAggregate( AggregateDecl *aggDecl ) {
94 if ( aggDecl->get_name() != "" )
95 before << aggDecl->get_name();
96
97 std::list< Declaration * > &memb = aggDecl->get_members();
98
99 if ( ! memb.empty() ) {
100 before << endl << string( cur_indent, ' ' ) << "{" << endl;
101
102 cur_indent += CodeGenerator2::tabsize;
103 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) {
104 before << string( cur_indent, ' ' );
105 (*i)->accept(*this );
106 before << ";" << endl;
107 }
108
109 cur_indent -= CodeGenerator2::tabsize;
110
111 before << string( cur_indent, ' ' ) << "}";
112 } // if
113 }
114
115 void CodeGenerator2::visit( StructDecl *structDecl ) {
116 before << "struct ";
117 handleAggregate( structDecl );
118 }
119
120 void CodeGenerator2::visit( UnionDecl *aggregateDecl ) {
121 before << "union ";
122 handleAggregate( aggregateDecl );
123 }
124
125 void CodeGenerator2::visit( EnumDecl *aggDecl ) {
126 before << "enum ";
127
128 if ( aggDecl->get_name() != "" )
129 before << aggDecl->get_name();
130
131 std::list< Declaration* > &memb = aggDecl->get_members();
132
133 if ( ! memb.empty() ) {
134 before << endl << "{" << endl;
135
136 cur_indent += CodeGenerator2::tabsize;
137 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) {
138 ObjectDecl *obj = dynamic_cast< ObjectDecl* >( *i );
139 assert( obj );
140 before << string( cur_indent, ' ' ) << mangleName( obj );
141 if ( obj->get_init() ) {
142 before << " = ";
143 obj->get_init()->accept(*this );
144 } // if
145 before << "," << endl;
146 } // for
147
148 cur_indent -= CodeGenerator2::tabsize;
149
150 before << "}" << endl;
151 } // if
152 }
153
154 void CodeGenerator2::visit( ContextDecl *aggregateDecl ) {}
155
156 void CodeGenerator2::visit( TypedefDecl *typeDecl ) {
157 before << "typedef ";
158 before << genType( typeDecl->get_base(), typeDecl->get_name() );
159 }
160
161 void CodeGenerator2::visit( TypeDecl *typeDecl ) {
162 // really, we should mutate this into something that isn't a TypeDecl but that requires large-scale changes,
163 // still to be done
164 before << "extern unsigned long " << typeDecl->get_name();
165 if ( typeDecl->get_base() ) {
166 before << " = sizeof( " << genType( typeDecl->get_base(), "" ) << " )";
167 } // if
168 }
169
170 void CodeGenerator2::visit( SingleInit *init ) {
171 init->get_value()->accept( *this );
172 }
173
174 void CodeGenerator2::visit( ListInit *init ) {
175 before << "{ ";
176 genCommaList( init->begin_initializers(), init->end_initializers() );
177 before << " }";
178 }
179
180 void CodeGenerator2::visit( Constant *constant ) {
181 before << constant->get_value() ;
182 }
183
184 //*** Expressions
185 void CodeGenerator2::visit( ApplicationExpr *applicationExpr ) {
186 if ( VariableExpr *varExpr = dynamic_cast< VariableExpr* >( applicationExpr->get_function() ) ) {
187 OperatorInfo opInfo;
188 if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( varExpr->get_var()->get_name(), opInfo ) ) {
189 std::list< Expression* >::iterator arg = applicationExpr->get_args().begin();
190 switch ( opInfo.type ) {
191 case OT_PREFIXASSIGN:
192 case OT_POSTFIXASSIGN:
193 case OT_INFIXASSIGN:
194 {
195 assert( arg != applicationExpr->get_args().end() );
196 if ( AddressExpr *addrExpr = dynamic_cast< AddressExpr * >( *arg ) ) {
197
198 *arg = addrExpr->get_arg();
199 } else {
200 UntypedExpr *newExpr = new UntypedExpr( new NameExpr( "*?" ) );
201 newExpr->get_args().push_back( *arg );
202 *arg = newExpr;
203 } // if
204 break;
205 }
206
207 default:
208 // do nothing
209 ;
210 }
211
212 switch ( opInfo.type ) {
213 case OT_INDEX:
214 assert( applicationExpr->get_args().size() == 2 );
215 (*arg++)->accept( *this );
216 before << "[";
217 (*arg)->accept( *this );
218 before << "]";
219 break;
220
221 case OT_CALL:
222 // there are no intrinsic definitions of the function call operator
223 assert( false );
224 break;
225
226 case OT_PREFIX:
227 case OT_PREFIXASSIGN:
228 assert( applicationExpr->get_args().size() == 1 );
229 before << "(";
230 before << opInfo.symbol;
231 (*arg)->accept( *this );
232 before << ")";
233 break;
234
235 case OT_POSTFIX:
236 case OT_POSTFIXASSIGN:
237 assert( applicationExpr->get_args().size() == 1 );
238 (*arg)->accept( *this );
239 before << opInfo.symbol;
240 break;
241
242 case OT_INFIX:
243 case OT_INFIXASSIGN:
244 assert( applicationExpr->get_args().size() == 2 );
245 before << "(";
246 (*arg++)->accept( *this );
247 before << opInfo.symbol;
248 (*arg)->accept( *this );
249 before << ")";
250 break;
251
252 case OT_CONSTANT:
253 // there are no intrinsic definitions of 0 or 1 as functions
254 assert( false );
255 }
256 } else {
257 varExpr->accept( *this );
258 before << "(";
259 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
260 before << ")";
261 } // if
262 } else {
263 applicationExpr->get_function()->accept( *this );
264 before << "(";
265 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
266 before << ")";
267 } // if
268 }
269
270 void CodeGenerator2::visit( UntypedExpr *untypedExpr ) {
271 if ( NameExpr *nameExpr = dynamic_cast< NameExpr* >( untypedExpr->get_function() ) ) {
272 OperatorInfo opInfo;
273 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
274 std::list< Expression* >::iterator arg = untypedExpr->get_args().begin();
275 switch ( opInfo.type ) {
276 case OT_INDEX:
277 assert( untypedExpr->get_args().size() == 2 );
278 (*arg++)->accept( *this );
279 before << "[";
280 (*arg)->accept( *this );
281 before << "]";
282 break;
283
284 case OT_CALL:
285 assert( false );
286 break;
287
288 case OT_PREFIX:
289 case OT_PREFIXASSIGN:
290 assert( untypedExpr->get_args().size() == 1 );
291 before << "(";
292 before << opInfo.symbol;
293 (*arg)->accept( *this );
294 before << ")";
295 break;
296
297 case OT_POSTFIX:
298 case OT_POSTFIXASSIGN:
299 assert( untypedExpr->get_args().size() == 1 );
300 (*arg)->accept( *this );
301 before << opInfo.symbol;
302 break;
303
304 case OT_INFIX:
305 case OT_INFIXASSIGN:
306 assert( untypedExpr->get_args().size() == 2 );
307 before << "(";
308 (*arg++)->accept( *this );
309 before << opInfo.symbol;
310 (*arg)->accept( *this );
311 before << ")";
312 break;
313
314 case OT_CONSTANT:
315 // there are no intrinsic definitions of 0 or 1 as functions
316 assert( false );
317 }
318 } else {
319 nameExpr->accept( *this );
320 before << "(";
321 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
322 before << ")";
323 } // if
324 } else {
325 untypedExpr->get_function()->accept( *this );
326 before << "(";
327 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
328 before << ")";
329 } // if
330 }
331
332 void CodeGenerator2::visit( NameExpr *nameExpr ) {
333 OperatorInfo opInfo;
334 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
335 assert( opInfo.type == OT_CONSTANT );
336 before << opInfo.symbol;
337 } else {
338 before << nameExpr->get_name();
339 } // if
340 }
341
342 void CodeGenerator2::visit( AddressExpr *addressExpr ) {
343 before << "(&";
344 // this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address
345 if ( VariableExpr *variableExpr = dynamic_cast< VariableExpr* >( addressExpr->get_arg() ) ) {
346 before << mangleName( variableExpr->get_var() );
347 } else {
348 addressExpr->get_arg()->accept( *this );
349 } // if
350 before << ")";
351 }
352
353 void CodeGenerator2::visit( CastExpr *castExpr ) {
354 before << "((";
355 if ( castExpr->get_results().empty() ) {
356 before << "void" ;
357 } else {
358 before << genType( castExpr->get_results().front(), "" );
359 } // if
360 before << ")";
361 castExpr->get_arg()->accept( *this );
362 before << ")";
363 }
364
365 void CodeGenerator2::visit( UntypedMemberExpr *memberExpr ) {
366 assert( false );
367 }
368
369 void CodeGenerator2::visit( MemberExpr *memberExpr ) {
370 memberExpr->get_aggregate()->accept( *this );
371 before << "." << mangleName( memberExpr->get_member() );
372 }
373
374 void CodeGenerator2::visit( VariableExpr *variableExpr ) {
375 OperatorInfo opInfo;
376 if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) {
377 before << opInfo.symbol;
378 } else {
379 before << mangleName( variableExpr->get_var() );
380 } // if
381 }
382
383 void CodeGenerator2::visit( ConstantExpr *constantExpr ) {
384 assert( constantExpr->get_constant() );
385 constantExpr->get_constant()->accept( *this );
386 }
387
388 void CodeGenerator2::visit( SizeofExpr *sizeofExpr ) {
389 before << "sizeof(";
390 if ( sizeofExpr->get_isType() ) {
391 before << genType( sizeofExpr->get_type(), "" );
392 } else {
393 sizeofExpr->get_expr()->accept( *this );
394 } // if
395 before << ")";
396 }
397
398 void CodeGenerator2::visit( LogicalExpr *logicalExpr ) {
399 before << "(";
400 logicalExpr->get_arg1()->accept( *this );
401 if ( logicalExpr->get_isAnd() ) {
402 before << " && ";
403 } else {
404 before << " || ";
405 } // if
406 logicalExpr->get_arg2()->accept( *this );
407 before << ")";
408 }
409
410 void CodeGenerator2::visit( ConditionalExpr *conditionalExpr ) {
411 before << "(";
412 conditionalExpr->get_arg1()->accept( *this );
413 before << " ? ";
414 conditionalExpr->get_arg2()->accept( *this );
415 before << " : ";
416 conditionalExpr->get_arg3()->accept( *this );
417 before << ")";
418 }
419
420 void CodeGenerator2::visit( CommaExpr *commaExpr ) {
421 before << "(";
422 commaExpr->get_arg1()->accept( *this );
423 before << " , ";
424 commaExpr->get_arg2()->accept( *this );
425 before << ")";
426 }
427
428 void CodeGenerator2::visit( TupleExpr *tupleExpr ) {}
429
430 void CodeGenerator2::visit( TypeExpr *typeExpr ) {}
431
432
433 //*** Statements
434 void CodeGenerator2::visit( CompoundStmt *compoundStmt ) {
435 std::list<Statement*> ks = compoundStmt->get_kids();
436
437 before << endl << string( cur_indent, ' ' ) << "{" << endl;
438
439 cur_indent += CodeGenerator2::tabsize;
440
441 for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++) {
442 before << string( cur_indent, ' ' ) << printLabels( (*i)->get_labels() ) ;
443 (*i)->accept(*this );
444 shift_left();
445 before << endl;
446 }
447 cur_indent -= CodeGenerator2::tabsize;
448
449 before << string( cur_indent, ' ' ) << "}" << endl;
450 }
451
452 void CodeGenerator2::visit( ExprStmt *exprStmt ) {
453 if ( exprStmt != 0 ) {
454 exprStmt->get_expr()->accept( *this );
455 shift_left();
456 before << ";" ;
457 } // if
458 }
459
460 void CodeGenerator2::visit( IfStmt *ifStmt ) {
461 before << "if (";
462 ifStmt->get_condition()->accept(*this );
463 after += ")\n";
464 shift_left();
465
466 cur_indent += CodeGenerator2::tabsize;
467 before << string( cur_indent, ' ' );
468 ifStmt->get_thenPart()->accept(*this );
469 cur_indent -= CodeGenerator2::tabsize;
470 shift_left(); before << endl;
471
472 if ( ifStmt->get_elsePart() != 0) {
473 before << string( cur_indent, ' ' ) << " else " << endl ;
474
475 cur_indent += CodeGenerator2::tabsize;
476 ifStmt->get_elsePart()->accept(*this );
477 cur_indent -= CodeGenerator2::tabsize;
478 } // if
479 }
480
481 void CodeGenerator2::visit( SwitchStmt *switchStmt ) {
482 //before << /* "\r" << */ string( cur_indent, ' ' ) << CodeGenerator2::printLabels( switchStmt->get_labels() )
483 before << "switch (" ;
484 switchStmt->get_condition()->accept(*this );
485 after += ")\n";
486 shift_left();
487
488 before << string( cur_indent, ' ' ) << "{" << std::endl;
489 cur_indent += CodeGenerator2::tabsize;
490
491 std::list< Statement * > stmts = switchStmt->get_branches();
492 bool lastBreak = false;
493
494 // horrible, horrible hack
495 if ( dynamic_cast<BranchStmt *>( stmts.back() ) != 0 ) {
496 lastBreak = true;
497 stmts.pop_back();
498 } // if
499 acceptAll( stmts, *this );
500 if ( lastBreak ) {
501 Statement *st = switchStmt->get_branches().back();
502 before << CodeGenerator2::printLabels( st->get_labels());
503 st->accept( *this );
504 } // if
505
506 cur_indent -= CodeGenerator2::tabsize;
507
508 before << /* "\r" << */ string( cur_indent, ' ' ) << "}" << endl ;
509 }
510
511 void CodeGenerator2::visit( CaseStmt *caseStmt ) {
512 before << string( cur_indent, ' ' );
513 if ( caseStmt->isDefault())
514 before << "default " ;
515 else {
516 before << "case " ;
517 caseStmt->get_condition()->accept(*this );
518 } // if
519 after += ":\n";
520 shift_left();
521
522 std::list<Statement *> sts = caseStmt->get_statements();
523
524 cur_indent += CodeGenerator2::tabsize;
525 for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) {
526 before << /* "\r" << */ string( cur_indent, ' ' ) << printLabels( (*i)->get_labels() ) ;
527 (*i)->accept(*this );
528 shift_left();
529 before << ";" << endl;
530 }
531 cur_indent -= CodeGenerator2::tabsize;
532 }
533
534 void CodeGenerator2::visit( BranchStmt *branchStmt ) {
535 switch ( branchStmt->get_type()) {
536 case BranchStmt::Goto:
537 if ( ! branchStmt->get_target().empty() )
538 before << "goto " << branchStmt->get_target();
539 else {
540 if ( branchStmt->get_computedTarget() != 0 ) {
541 before << "goto *";
542 branchStmt->get_computedTarget()->accept( *this );
543 } // if
544 } // if
545 break;
546 case BranchStmt::Break:
547 before << "break";
548 break;
549 case BranchStmt::Continue:
550 before << "continue";
551 break;
552 }
553 before << ";";
554 }
555
556
557 void CodeGenerator2::visit( ReturnStmt *returnStmt ) {
558 before << "return ";
559
560 // xxx -- check for null expression;
561 if ( returnStmt->get_expr() ) {
562 returnStmt->get_expr()->accept( *this );
563 } // if
564 after += ";";
565 }
566
567 void CodeGenerator2::visit( WhileStmt *whileStmt ) {
568 if ( whileStmt->get_isDoWhile() )
569 before << "do" ;
570 else {
571 before << "while (" ;
572 whileStmt->get_condition()->accept(*this );
573 after += ")";
574 } // if
575 after += "{\n";
576 shift_left();
577
578 whileStmt->get_body()->accept( *this );
579
580 before << /* "\r" << */ string( cur_indent, ' ' ) << "}" ;
581
582 if ( whileStmt->get_isDoWhile() ) {
583 before << " while (" ;
584 whileStmt->get_condition()->accept(*this );
585 after += ");";
586 } // if
587
588 after += "\n";
589 }
590
591 void CodeGenerator2::visit( ForStmt *forStmt ) {
592 before << "for (";
593
594 if ( forStmt->get_initialization() != 0 )
595 forStmt->get_initialization()->accept( *this );
596 else
597 before << ";";
598 shift_left();
599
600 if ( forStmt->get_condition() != 0 )
601 forStmt->get_condition()->accept( *this );
602 shift_left(); before << ";";
603
604 if ( forStmt->get_increment() != 0 )
605 forStmt->get_increment()->accept( *this );
606 shift_left(); before << ")" << endl;
607
608 if ( forStmt->get_body() != 0 ) {
609 cur_indent += CodeGenerator2::tabsize;
610 before << string( cur_indent, ' ' ) << CodeGenerator2::printLabels( forStmt->get_body()->get_labels() );
611 forStmt->get_body()->accept( *this );
612 cur_indent -= CodeGenerator2::tabsize;
613 } // if
614 }
615
616 void CodeGenerator2::visit( NullStmt *nullStmt ) {
617 //before << /* "\r" << */ string( cur_indent, ' ' ) << CodeGenerator2::printLabels( nullStmt->get_labels() );
618 before << "/* null statement */ ;";
619 }
620
621 void CodeGenerator2::visit( DeclStmt *declStmt ) {
622 declStmt->get_decl()->accept( *this );
623
624 if ( doSemicolon( declStmt->get_decl() ) ) {
625 after += ";";
626 } // if
627 shift_left();
628 }
629
630 std::string CodeGenerator2::printLabels( std::list< Label > &l ) {
631 std::string str( "" );
632 l.unique();
633
634 for ( std::list< Label >::iterator i = l.begin(); i != l.end(); i++ )
635 str += *i + ": ";
636
637 return str;
638 }
639
640 void CodeGenerator2::shift_left() {
641 before << after;
642 after = "";
643 }
644
645 void CodeGenerator2::handleStorageClass( Declaration *decl ) {
646 switch ( decl->get_storageClass() ) {
647 case Declaration::NoStorageClass:
648 break;
649 case Declaration::Extern:
650 before << "extern ";
651 break;
652 case Declaration::Static:
653 before << "static ";
654 break;
655 case Declaration::Auto:
656 // silently drop storage class
657 break;
658 case Declaration::Register:
659 before << "register ";
660 break;
661 case Declaration::Inline:
662 // handled as special via isInline flag (FIX)
663 break;
664 case Declaration::Fortran:
665 // not handled
666 break;
667 } // switch
668 }
669} // namespace CodeGen
670
671// Local Variables: //
672// tab-width: 4 //
673// mode: c++ //
674// compile-command: "make install" //
675// End: //
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