source: src/CodeGen/CodeGenerator.cc@ 1869adf

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 1869adf was 94e0864d, checked in by Rob Schluntz <rschlunt@…>, 10 years ago

Merge branch 'master' into resolver

Conflicts:

src/CodeGen/CodeGenerator.cc
src/Parser/ExpressionNode.cc
src/ResolvExpr/Resolver.cc
  • Property mode set to 100644
File size: 17.8 KB
RevLine 
[51587aa]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//
[6c4ff37]7// CodeGenerator.cc --
[51587aa]8//
9// Author : Richard C. Bilson
10// Created On : Mon May 18 07:44:20 2015
[eb3261f]11// Last Modified By : Rob Schluntz
[94e0864d]12// Last Modified On : Wed Jun 24 16:11:41 2015
13// Update Count : 143
[51587aa]14//
15
[51b73452]16#include <algorithm>
17#include <iostream>
18#include <cassert>
19#include <list>
20
[68cd1ce]21#include "Parser/ParseNode.h"
22
[51b73452]23#include "SynTree/Type.h"
24#include "SynTree/Expression.h"
25#include "SynTree/Initializer.h"
[68cd1ce]26#include "SynTree/Statement.h"
[51b73452]27
28#include "utility.h"
29#include "UnimplementedError.h"
30
[a61fea9a]31#include "CodeGenerator.h"
[51b73452]32#include "OperatorTable.h"
33#include "GenType.h"
34
35using namespace std;
36
37namespace CodeGen {
[6c4ff37]38 int CodeGenerator::tabsize = 4;
[51587aa]39
[2b6c1e0]40 // the kinds of statements that would ideally be separated by more whitespace
41 bool wantSpacing( Statement * stmt) {
42 return dynamic_cast< IfStmt * >( stmt ) || dynamic_cast< CompoundStmt * >( stmt ) ||
43 dynamic_cast< WhileStmt * >( stmt ) || dynamic_cast< ForStmt * > ( stmt ) || dynamic_cast< SwitchStmt *>( stmt );
44 }
45
[cda48b6]46 ostream & CodeGenerator::Indenter::operator()( ostream & output ) {
47 return output << string( cg.cur_indent, ' ' );
48 }
49
50 ostream & operator<<( ostream & output, CodeGenerator::Indenter &indent ) {
51 return indent( output );
52 }
[51587aa]53
[cda48b6]54 CodeGenerator::CodeGenerator( std::ostream &os ) : indent(*this), cur_indent( 0 ), insideFunction( false ), output( os ) { }
55
56 CodeGenerator::CodeGenerator( std::ostream &os, std::string init, int indentation, bool infunp )
57 : indent(*this), cur_indent( indentation ), insideFunction( infunp ), output( os ) {
[6c4ff37]58 //output << std::string( init );
[51587aa]59 }
60
[cda48b6]61 CodeGenerator::CodeGenerator( std::ostream &os, char *init, int indentation, bool infunp )
62 : indent(*this), cur_indent( indentation ), insideFunction( infunp ), output( os ) {
[6c4ff37]63 //output << std::string( init );
[51587aa]64 }
65
66 string mangleName( DeclarationWithType *decl ) {
67 if ( decl->get_mangleName() != "" ) {
68 return decl->get_mangleName();
69 } else {
70 return decl->get_name();
71 } // if
72 }
[94b4364]73
[51587aa]74 //*** Declarations
[6c4ff37]75 void CodeGenerator::visit( FunctionDecl *functionDecl ) {
[51587aa]76 handleStorageClass( functionDecl );
[f38c8d9]77 if ( functionDecl->get_isInline() ) {
[6c4ff37]78 output << "inline ";
[f38c8d9]79 } // if
[de62360d]80 if ( functionDecl->get_isNoreturn() ) {
81 output << "_Noreturn ";
82 } // if
[6c4ff37]83 output << genType( functionDecl->get_functionType(), mangleName( functionDecl ) );
[51587aa]84
85 // how to get this to the Functype?
86 std::list< Declaration * > olds = functionDecl->get_oldDecls();
87 if ( ! olds.empty() ) {
[6c4ff37]88 output << " /* function has old declaration */";
[51587aa]89 } // if
90
91 // acceptAll( functionDecl->get_oldDecls(), *this );
92 if ( functionDecl->get_statements() ) {
93 functionDecl->get_statements()->accept(*this );
94 } // if
95 }
96
[6c4ff37]97 void CodeGenerator::visit( ObjectDecl *objectDecl ) {
[51587aa]98 handleStorageClass( objectDecl );
[6c4ff37]99 output << genType( objectDecl->get_type(), mangleName( objectDecl ) );
[51587aa]100
101 if ( objectDecl->get_init() ) {
[6c4ff37]102 output << " = ";
[51587aa]103 objectDecl->get_init()->accept( *this );
104 } // if
105 if ( objectDecl->get_bitfieldWidth() ) {
[6c4ff37]106 output << ":";
[51587aa]107 objectDecl->get_bitfieldWidth()->accept( *this );
108 } // if
109 }
110
[6c4ff37]111 void CodeGenerator::handleAggregate( AggregateDecl *aggDecl ) {
[51587aa]112 if ( aggDecl->get_name() != "" )
[6c4ff37]113 output << aggDecl->get_name();
[51587aa]114
115 std::list< Declaration * > &memb = aggDecl->get_members();
116
117 if ( ! memb.empty() ) {
[94b4364]118 output << " {" << endl;
[51587aa]119
[6c4ff37]120 cur_indent += CodeGenerator::tabsize;
[51587aa]121 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) {
[cda48b6]122 output << indent;
[51587aa]123 (*i)->accept(*this );
[6c4ff37]124 output << ";" << endl;
[51587aa]125 }
126
[6c4ff37]127 cur_indent -= CodeGenerator::tabsize;
[51587aa]128
[cda48b6]129 output << indent << "}";
[17cd4eb]130 } // if
[51587aa]131 }
[17cd4eb]132
[6c4ff37]133 void CodeGenerator::visit( StructDecl *structDecl ) {
134 output << "struct ";
[51587aa]135 handleAggregate( structDecl );
136 }
[17cd4eb]137
[6c4ff37]138 void CodeGenerator::visit( UnionDecl *aggregateDecl ) {
139 output << "union ";
[51587aa]140 handleAggregate( aggregateDecl );
141 }
[51b73452]142
[6c4ff37]143 void CodeGenerator::visit( EnumDecl *aggDecl ) {
144 output << "enum ";
[51587aa]145
146 if ( aggDecl->get_name() != "" )
[6c4ff37]147 output << aggDecl->get_name();
[51587aa]148
149 std::list< Declaration* > &memb = aggDecl->get_members();
150
151 if ( ! memb.empty() ) {
[cda48b6]152 output << " {" << endl;
[51587aa]153
[6c4ff37]154 cur_indent += CodeGenerator::tabsize;
[51587aa]155 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) {
156 ObjectDecl *obj = dynamic_cast< ObjectDecl* >( *i );
157 assert( obj );
[cda48b6]158 output << indent << mangleName( obj );
[51587aa]159 if ( obj->get_init() ) {
[6c4ff37]160 output << " = ";
[51587aa]161 obj->get_init()->accept(*this );
162 } // if
[6c4ff37]163 output << "," << endl;
[51587aa]164 } // for
165
[6c4ff37]166 cur_indent -= CodeGenerator::tabsize;
[51587aa]167
[cda48b6]168 output << indent << "}";
[51587aa]169 } // if
170 }
[51b73452]171
[6c4ff37]172 void CodeGenerator::visit( ContextDecl *aggregateDecl ) {}
[51587aa]173
[6c4ff37]174 void CodeGenerator::visit( TypedefDecl *typeDecl ) {
175 output << "typedef ";
176 output << genType( typeDecl->get_base(), typeDecl->get_name() );
[51587aa]177 }
[51b73452]178
[6c4ff37]179 void CodeGenerator::visit( TypeDecl *typeDecl ) {
[51587aa]180 // really, we should mutate this into something that isn't a TypeDecl but that requires large-scale changes,
181 // still to be done
[6c4ff37]182 output << "extern unsigned long " << typeDecl->get_name();
[51587aa]183 if ( typeDecl->get_base() ) {
[6c4ff37]184 output << " = sizeof( " << genType( typeDecl->get_base(), "" ) << " )";
[51587aa]185 } // if
186 }
187
[6c4ff37]188 void CodeGenerator::visit( SingleInit *init ) {
[51587aa]189 init->get_value()->accept( *this );
190 }
191
[6c4ff37]192 void CodeGenerator::visit( ListInit *init ) {
193 output << "{ ";
[51587aa]194 genCommaList( init->begin_initializers(), init->end_initializers() );
[6c4ff37]195 output << " }";
[51587aa]196 }
197
[6c4ff37]198 void CodeGenerator::visit( Constant *constant ) {
199 output << constant->get_value() ;
[51587aa]200 }
201
202 //*** Expressions
[6c4ff37]203 void CodeGenerator::visit( ApplicationExpr *applicationExpr ) {
[51587aa]204 if ( VariableExpr *varExpr = dynamic_cast< VariableExpr* >( applicationExpr->get_function() ) ) {
205 OperatorInfo opInfo;
206 if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( varExpr->get_var()->get_name(), opInfo ) ) {
207 std::list< Expression* >::iterator arg = applicationExpr->get_args().begin();
208 switch ( opInfo.type ) {
209 case OT_PREFIXASSIGN:
210 case OT_POSTFIXASSIGN:
211 case OT_INFIXASSIGN:
212 {
213 assert( arg != applicationExpr->get_args().end() );
214 if ( AddressExpr *addrExpr = dynamic_cast< AddressExpr * >( *arg ) ) {
215
216 *arg = addrExpr->get_arg();
217 } else {
218 UntypedExpr *newExpr = new UntypedExpr( new NameExpr( "*?" ) );
219 newExpr->get_args().push_back( *arg );
220 *arg = newExpr;
221 } // if
222 break;
223 }
224
225 default:
226 // do nothing
227 ;
228 }
229
230 switch ( opInfo.type ) {
231 case OT_INDEX:
232 assert( applicationExpr->get_args().size() == 2 );
233 (*arg++)->accept( *this );
[6c4ff37]234 output << "[";
[51587aa]235 (*arg)->accept( *this );
[6c4ff37]236 output << "]";
[51587aa]237 break;
238
239 case OT_CALL:
240 // there are no intrinsic definitions of the function call operator
241 assert( false );
242 break;
243
244 case OT_PREFIX:
245 case OT_PREFIXASSIGN:
246 assert( applicationExpr->get_args().size() == 1 );
[6c4ff37]247 output << "(";
248 output << opInfo.symbol;
[51587aa]249 (*arg)->accept( *this );
[6c4ff37]250 output << ")";
[51587aa]251 break;
252
253 case OT_POSTFIX:
254 case OT_POSTFIXASSIGN:
255 assert( applicationExpr->get_args().size() == 1 );
256 (*arg)->accept( *this );
[6c4ff37]257 output << opInfo.symbol;
[51587aa]258 break;
259
260 case OT_INFIX:
261 case OT_INFIXASSIGN:
262 assert( applicationExpr->get_args().size() == 2 );
[6c4ff37]263 output << "(";
[51587aa]264 (*arg++)->accept( *this );
[6c4ff37]265 output << opInfo.symbol;
[51587aa]266 (*arg)->accept( *this );
[6c4ff37]267 output << ")";
[51587aa]268 break;
269
270 case OT_CONSTANT:
271 // there are no intrinsic definitions of 0 or 1 as functions
272 assert( false );
273 }
[17cd4eb]274 } else {
[51587aa]275 varExpr->accept( *this );
[6c4ff37]276 output << "(";
[51587aa]277 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]278 output << ")";
[17cd4eb]279 } // if
[51587aa]280 } else {
281 applicationExpr->get_function()->accept( *this );
[6c4ff37]282 output << "(";
[51587aa]283 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]284 output << ")";
[51587aa]285 } // if
286 }
[51b73452]287
[6c4ff37]288 void CodeGenerator::visit( UntypedExpr *untypedExpr ) {
[51587aa]289 if ( NameExpr *nameExpr = dynamic_cast< NameExpr* >( untypedExpr->get_function() ) ) {
290 OperatorInfo opInfo;
291 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
292 std::list< Expression* >::iterator arg = untypedExpr->get_args().begin();
293 switch ( opInfo.type ) {
294 case OT_INDEX:
295 assert( untypedExpr->get_args().size() == 2 );
296 (*arg++)->accept( *this );
[6c4ff37]297 output << "[";
[51587aa]298 (*arg)->accept( *this );
[6c4ff37]299 output << "]";
[51587aa]300 break;
301
302 case OT_CALL:
303 assert( false );
304 break;
305
306 case OT_PREFIX:
307 case OT_PREFIXASSIGN:
[de62360d]308 case OT_LABELADDRESS:
[51587aa]309 assert( untypedExpr->get_args().size() == 1 );
[6c4ff37]310 output << "(";
311 output << opInfo.symbol;
[51587aa]312 (*arg)->accept( *this );
[6c4ff37]313 output << ")";
[51587aa]314 break;
315
316 case OT_POSTFIX:
317 case OT_POSTFIXASSIGN:
318 assert( untypedExpr->get_args().size() == 1 );
319 (*arg)->accept( *this );
[6c4ff37]320 output << opInfo.symbol;
[51587aa]321 break;
[51b73452]322
[51587aa]323 case OT_INFIX:
324 case OT_INFIXASSIGN:
325 assert( untypedExpr->get_args().size() == 2 );
[6c4ff37]326 output << "(";
[51587aa]327 (*arg++)->accept( *this );
[6c4ff37]328 output << opInfo.symbol;
[51587aa]329 (*arg)->accept( *this );
[6c4ff37]330 output << ")";
[51587aa]331 break;
[de62360d]332
[51587aa]333 case OT_CONSTANT:
334 // there are no intrinsic definitions of 0 or 1 as functions
335 assert( false );
336 }
337 } else {
338 nameExpr->accept( *this );
[6c4ff37]339 output << "(";
[51587aa]340 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
[6c4ff37]341 output << ")";
[51587aa]342 } // if
343 } else {
344 untypedExpr->get_function()->accept( *this );
[6c4ff37]345 output << "(";
[51587aa]346 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
[6c4ff37]347 output << ")";
[51587aa]348 } // if
349 }
[51b73452]350
[6c4ff37]351 void CodeGenerator::visit( NameExpr *nameExpr ) {
[51587aa]352 OperatorInfo opInfo;
353 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
354 assert( opInfo.type == OT_CONSTANT );
[6c4ff37]355 output << opInfo.symbol;
[51587aa]356 } else {
[6c4ff37]357 output << nameExpr->get_name();
[51587aa]358 } // if
359 }
[51b73452]360
[6c4ff37]361 void CodeGenerator::visit( AddressExpr *addressExpr ) {
362 output << "(&";
[51587aa]363 // this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address
364 if ( VariableExpr *variableExpr = dynamic_cast< VariableExpr* >( addressExpr->get_arg() ) ) {
[6c4ff37]365 output << mangleName( variableExpr->get_var() );
[51587aa]366 } else {
367 addressExpr->get_arg()->accept( *this );
368 } // if
[6c4ff37]369 output << ")";
[51587aa]370 }
371
[6c4ff37]372 void CodeGenerator::visit( CastExpr *castExpr ) {
373 output << "((";
[51587aa]374 if ( castExpr->get_results().empty() ) {
[6c4ff37]375 output << "void" ;
[51587aa]376 } else {
[6c4ff37]377 output << genType( castExpr->get_results().front(), "" );
[51587aa]378 } // if
[6c4ff37]379 output << ")";
[51587aa]380 castExpr->get_arg()->accept( *this );
[6c4ff37]381 output << ")";
[51587aa]382 }
[51b73452]383
[6c4ff37]384 void CodeGenerator::visit( UntypedMemberExpr *memberExpr ) {
[51587aa]385 assert( false );
386 }
[51b73452]387
[6c4ff37]388 void CodeGenerator::visit( MemberExpr *memberExpr ) {
[51587aa]389 memberExpr->get_aggregate()->accept( *this );
[6c4ff37]390 output << "." << mangleName( memberExpr->get_member() );
[51587aa]391 }
[51b73452]392
[6c4ff37]393 void CodeGenerator::visit( VariableExpr *variableExpr ) {
[51587aa]394 OperatorInfo opInfo;
395 if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) {
[6c4ff37]396 output << opInfo.symbol;
[51587aa]397 } else {
[6c4ff37]398 output << mangleName( variableExpr->get_var() );
[51587aa]399 } // if
400 }
[51b73452]401
[6c4ff37]402 void CodeGenerator::visit( ConstantExpr *constantExpr ) {
[51587aa]403 assert( constantExpr->get_constant() );
404 constantExpr->get_constant()->accept( *this );
405 }
[51b73452]406
[6c4ff37]407 void CodeGenerator::visit( SizeofExpr *sizeofExpr ) {
408 output << "sizeof(";
[51587aa]409 if ( sizeofExpr->get_isType() ) {
[6c4ff37]410 output << genType( sizeofExpr->get_type(), "" );
[51587aa]411 } else {
412 sizeofExpr->get_expr()->accept( *this );
413 } // if
[6c4ff37]414 output << ")";
[51587aa]415 }
[51b73452]416
[6c4ff37]417 void CodeGenerator::visit( LogicalExpr *logicalExpr ) {
418 output << "(";
[51587aa]419 logicalExpr->get_arg1()->accept( *this );
420 if ( logicalExpr->get_isAnd() ) {
[6c4ff37]421 output << " && ";
[51587aa]422 } else {
[6c4ff37]423 output << " || ";
[51587aa]424 } // if
425 logicalExpr->get_arg2()->accept( *this );
[6c4ff37]426 output << ")";
[51587aa]427 }
[51b73452]428
[6c4ff37]429 void CodeGenerator::visit( ConditionalExpr *conditionalExpr ) {
430 output << "(";
[51587aa]431 conditionalExpr->get_arg1()->accept( *this );
[6c4ff37]432 output << " ? ";
[51587aa]433 conditionalExpr->get_arg2()->accept( *this );
[6c4ff37]434 output << " : ";
[51587aa]435 conditionalExpr->get_arg3()->accept( *this );
[6c4ff37]436 output << ")";
[51587aa]437 }
[51b73452]438
[6c4ff37]439 void CodeGenerator::visit( CommaExpr *commaExpr ) {
440 output << "(";
[51587aa]441 commaExpr->get_arg1()->accept( *this );
[6c4ff37]442 output << " , ";
[51587aa]443 commaExpr->get_arg2()->accept( *this );
[6c4ff37]444 output << ")";
[51587aa]445 }
[51b73452]446
[6c4ff37]447 void CodeGenerator::visit( TupleExpr *tupleExpr ) {}
[51b73452]448
[6c4ff37]449 void CodeGenerator::visit( TypeExpr *typeExpr ) {}
[2b6c1e0]450
[51587aa]451 //*** Statements
[6c4ff37]452 void CodeGenerator::visit( CompoundStmt *compoundStmt ) {
[51587aa]453 std::list<Statement*> ks = compoundStmt->get_kids();
[2b6c1e0]454 output << "{" << endl;
[51587aa]455
[2b6c1e0]456 cur_indent += CodeGenerator::tabsize;
[51587aa]457
458 for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++) {
[cda48b6]459 output << indent << printLabels( (*i)->get_labels() );
[51587aa]460 (*i)->accept(*this );
[2b6c1e0]461
[6c4ff37]462 output << endl;
[2b6c1e0]463 if ( wantSpacing( *i ) ) {
464 output << endl;
465 }
[51587aa]466 }
[6c4ff37]467 cur_indent -= CodeGenerator::tabsize;
[51587aa]468
[cda48b6]469 output << indent << "}";
[51587aa]470 }
471
[6c4ff37]472 void CodeGenerator::visit( ExprStmt *exprStmt ) {
473 // I don't see why this check is necessary.
474 // If this starts to cause problems then put it back in,
475 // with an explanation
476 assert( exprStmt );
477
478 // if ( exprStmt != 0 ) {
479 exprStmt->get_expr()->accept( *this );
480 output << ";" ;
481 // } // if
[51587aa]482 }
483
[6c4ff37]484 void CodeGenerator::visit( IfStmt *ifStmt ) {
485 output << "if (";
[51587aa]486 ifStmt->get_condition()->accept(*this );
[2b6c1e0]487 output << ") ";
[51587aa]488
489 ifStmt->get_thenPart()->accept(*this );
490
491 if ( ifStmt->get_elsePart() != 0) {
[2b6c1e0]492 output << " else ";
[51587aa]493 ifStmt->get_elsePart()->accept(*this );
494 } // if
495 }
496
[6c4ff37]497 void CodeGenerator::visit( SwitchStmt *switchStmt ) {
498 output << "switch (" ;
[51587aa]499 switchStmt->get_condition()->accept(*this );
[2b6c1e0]500 output << ") ";
[6c4ff37]501
[2b6c1e0]502 output << "{" << std::endl;
[6c4ff37]503 cur_indent += CodeGenerator::tabsize;
[51587aa]504
[6c4ff37]505 acceptAll( switchStmt->get_branches(), *this );
[51587aa]506
[6c4ff37]507 cur_indent -= CodeGenerator::tabsize;
[51587aa]508
[cda48b6]509 output << indent << "}";
[51587aa]510 }
511
[6c4ff37]512 void CodeGenerator::visit( CaseStmt *caseStmt ) {
[cda48b6]513 output << indent;
[eb3261f]514 if ( caseStmt->isDefault()) {
[2b6c1e0]515 output << "default";
[eb3261f]516 } else {
[2b6c1e0]517 output << "case ";
[51587aa]518 caseStmt->get_condition()->accept(*this );
[17cd4eb]519 } // if
[6c4ff37]520 output << ":\n";
521
[51587aa]522 std::list<Statement *> sts = caseStmt->get_statements();
523
[6c4ff37]524 cur_indent += CodeGenerator::tabsize;
[51587aa]525 for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) {
[cda48b6]526 output << indent << printLabels( (*i)->get_labels() ) ;
[51587aa]527 (*i)->accept(*this );
[6c4ff37]528 output << endl;
[51587aa]529 }
[6c4ff37]530 cur_indent -= CodeGenerator::tabsize;
[51587aa]531 }
532
[6c4ff37]533 void CodeGenerator::visit( BranchStmt *branchStmt ) {
[51587aa]534 switch ( branchStmt->get_type()) {
535 case BranchStmt::Goto:
536 if ( ! branchStmt->get_target().empty() )
[6c4ff37]537 output << "goto " << branchStmt->get_target();
[51587aa]538 else {
539 if ( branchStmt->get_computedTarget() != 0 ) {
[6c4ff37]540 output << "goto *";
[51587aa]541 branchStmt->get_computedTarget()->accept( *this );
542 } // if
543 } // if
544 break;
545 case BranchStmt::Break:
[6c4ff37]546 output << "break";
[51587aa]547 break;
548 case BranchStmt::Continue:
[6c4ff37]549 output << "continue";
[51587aa]550 break;
551 }
[2b6c1e0]552 output << ";";
[51587aa]553 }
554
555
[6c4ff37]556 void CodeGenerator::visit( ReturnStmt *returnStmt ) {
557 output << "return ";
[51587aa]558
559 // xxx -- check for null expression;
560 if ( returnStmt->get_expr() ) {
561 returnStmt->get_expr()->accept( *this );
562 } // if
[6c4ff37]563 output << ";";
[51587aa]564 }
565
[6c4ff37]566 void CodeGenerator::visit( WhileStmt *whileStmt ) {
[51587aa]567 if ( whileStmt->get_isDoWhile() )
[6c4ff37]568 output << "do" ;
[51587aa]569 else {
[6c4ff37]570 output << "while (" ;
[51587aa]571 whileStmt->get_condition()->accept(*this );
[6c4ff37]572 output << ")";
[51587aa]573 } // if
[2b6c1e0]574 output << " ";
[51587aa]575
[2b6c1e0]576 output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() );
[51587aa]577 whileStmt->get_body()->accept( *this );
578
[cda48b6]579 output << indent;
[51587aa]580
581 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]582 output << " while (" ;
[51587aa]583 whileStmt->get_condition()->accept(*this );
[6c4ff37]584 output << ");";
[51587aa]585 } // if
586 }
587
[6c4ff37]588 void CodeGenerator::visit( ForStmt *forStmt ) {
589 output << "for (";
[51587aa]590
591 if ( forStmt->get_initialization() != 0 )
592 forStmt->get_initialization()->accept( *this );
593 else
[6c4ff37]594 output << ";";
595
[51587aa]596 if ( forStmt->get_condition() != 0 )
597 forStmt->get_condition()->accept( *this );
[6c4ff37]598 output << ";";
[51587aa]599
600 if ( forStmt->get_increment() != 0 )
601 forStmt->get_increment()->accept( *this );
[2b6c1e0]602 output << ") ";
[51587aa]603
604 if ( forStmt->get_body() != 0 ) {
[2b6c1e0]605 output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() );
[51587aa]606 forStmt->get_body()->accept( *this );
607 } // if
608 }
609
[6c4ff37]610 void CodeGenerator::visit( NullStmt *nullStmt ) {
[cda48b6]611 //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() );
[6c4ff37]612 output << "/* null statement */ ;";
[51587aa]613 }
614
[6c4ff37]615 void CodeGenerator::visit( DeclStmt *declStmt ) {
[51587aa]616 declStmt->get_decl()->accept( *this );
617
618 if ( doSemicolon( declStmt->get_decl() ) ) {
[6c4ff37]619 output << ";";
[51587aa]620 } // if
621 }
622
[6c4ff37]623 std::string CodeGenerator::printLabels( std::list< Label > &l ) {
[51587aa]624 std::string str( "" );
[6c4ff37]625 l.unique(); // assumes a sorted list. Why not use set?
[51587aa]626
627 for ( std::list< Label >::iterator i = l.begin(); i != l.end(); i++ )
628 str += *i + ": ";
629
630 return str;
631 }
632
[6c4ff37]633 void CodeGenerator::handleStorageClass( Declaration *decl ) {
[51587aa]634 switch ( decl->get_storageClass() ) {
[68cd1ce]635 case DeclarationNode::Extern:
[6c4ff37]636 output << "extern ";
[51587aa]637 break;
[68cd1ce]638 case DeclarationNode::Static:
[6c4ff37]639 output << "static ";
[51587aa]640 break;
[68cd1ce]641 case DeclarationNode::Auto:
[51587aa]642 // silently drop storage class
643 break;
[68cd1ce]644 case DeclarationNode::Register:
[6c4ff37]645 output << "register ";
[51587aa]646 break;
[68cd1ce]647 case DeclarationNode::Inline:
[de62360d]648 output << "inline ";
[f38c8d9]649 break;
[68cd1ce]650 case DeclarationNode::Fortran:
651 output << "fortran ";
652 break;
653 case DeclarationNode::Noreturn:
654 output << "_Noreturn ";
655 break;
656 case DeclarationNode::Threadlocal:
657 output << "_Thread_local ";
658 break;
659 case DeclarationNode::NoStorageClass:
[f38c8d9]660 break;
[843054c2]661 } // switch
[51587aa]662 }
[51b73452]663} // namespace CodeGen
[51587aa]664
665// Local Variables: //
666// tab-width: 4 //
667// mode: c++ //
668// compile-command: "make install" //
669// End: //
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