source: src/CodeGen/CodeGenerator.cc@ 893256d

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 with_gc
Last change on this file since 893256d was 2794fff, checked in by Rob Schluntz <rschlunt@…>, 10 years ago

started adding some of the basic code for constructors and destructors
  • Property mode set to 100644
File size: 17.9 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
[145f1fc]11// Last Modified By : Rob Schluntz
12// Last Modified On : Wed Jul 15 14:47:42 2015
13// Update Count : 177
[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
[145f1fc]40 // the kinds of statements that would ideally be followed by whitespace
[2b6c1e0]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:
[2794fff]240 case OT_CTOR:
241 case OT_DTOR:
242 // there are no intrinsic definitions of the function call operator or constructors or destructors
[51587aa]243 assert( false );
244 break;
245
246 case OT_PREFIX:
247 case OT_PREFIXASSIGN:
248 assert( applicationExpr->get_args().size() == 1 );
[6c4ff37]249 output << "(";
250 output << opInfo.symbol;
[51587aa]251 (*arg)->accept( *this );
[6c4ff37]252 output << ")";
[51587aa]253 break;
254
255 case OT_POSTFIX:
256 case OT_POSTFIXASSIGN:
257 assert( applicationExpr->get_args().size() == 1 );
258 (*arg)->accept( *this );
[6c4ff37]259 output << opInfo.symbol;
[51587aa]260 break;
261
262 case OT_INFIX:
263 case OT_INFIXASSIGN:
264 assert( applicationExpr->get_args().size() == 2 );
[6c4ff37]265 output << "(";
[51587aa]266 (*arg++)->accept( *this );
[6c4ff37]267 output << opInfo.symbol;
[51587aa]268 (*arg)->accept( *this );
[6c4ff37]269 output << ")";
[51587aa]270 break;
271
272 case OT_CONSTANT:
[721f17a]273 case OT_LABELADDRESS:
274 // there are no intrinsic definitions of 0/1 or label addresses as functions
[51587aa]275 assert( false );
276 }
[17cd4eb]277 } else {
[51587aa]278 varExpr->accept( *this );
[6c4ff37]279 output << "(";
[51587aa]280 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]281 output << ")";
[17cd4eb]282 } // if
[51587aa]283 } else {
284 applicationExpr->get_function()->accept( *this );
[6c4ff37]285 output << "(";
[51587aa]286 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]287 output << ")";
[51587aa]288 } // if
289 }
[51b73452]290
[6c4ff37]291 void CodeGenerator::visit( UntypedExpr *untypedExpr ) {
[51587aa]292 if ( NameExpr *nameExpr = dynamic_cast< NameExpr* >( untypedExpr->get_function() ) ) {
293 OperatorInfo opInfo;
294 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
295 std::list< Expression* >::iterator arg = untypedExpr->get_args().begin();
296 switch ( opInfo.type ) {
297 case OT_INDEX:
298 assert( untypedExpr->get_args().size() == 2 );
299 (*arg++)->accept( *this );
[6c4ff37]300 output << "[";
[51587aa]301 (*arg)->accept( *this );
[6c4ff37]302 output << "]";
[51587aa]303 break;
304
305 case OT_CALL:
306 assert( false );
307 break;
308
309 case OT_PREFIX:
310 case OT_PREFIXASSIGN:
[de62360d]311 case OT_LABELADDRESS:
[51587aa]312 assert( untypedExpr->get_args().size() == 1 );
[6c4ff37]313 output << "(";
314 output << opInfo.symbol;
[51587aa]315 (*arg)->accept( *this );
[6c4ff37]316 output << ")";
[51587aa]317 break;
318
319 case OT_POSTFIX:
320 case OT_POSTFIXASSIGN:
321 assert( untypedExpr->get_args().size() == 1 );
322 (*arg)->accept( *this );
[6c4ff37]323 output << opInfo.symbol;
[51587aa]324 break;
[51b73452]325
[51587aa]326 case OT_INFIX:
327 case OT_INFIXASSIGN:
328 assert( untypedExpr->get_args().size() == 2 );
[6c4ff37]329 output << "(";
[51587aa]330 (*arg++)->accept( *this );
[6c4ff37]331 output << opInfo.symbol;
[51587aa]332 (*arg)->accept( *this );
[6c4ff37]333 output << ")";
[51587aa]334 break;
[de62360d]335
[51587aa]336 case OT_CONSTANT:
337 // there are no intrinsic definitions of 0 or 1 as functions
338 assert( false );
339 }
340 } else {
341 nameExpr->accept( *this );
[6c4ff37]342 output << "(";
[51587aa]343 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
[6c4ff37]344 output << ")";
[51587aa]345 } // if
346 } else {
347 untypedExpr->get_function()->accept( *this );
[6c4ff37]348 output << "(";
[51587aa]349 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
[6c4ff37]350 output << ")";
[51587aa]351 } // if
352 }
[51b73452]353
[6c4ff37]354 void CodeGenerator::visit( NameExpr *nameExpr ) {
[51587aa]355 OperatorInfo opInfo;
356 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
357 assert( opInfo.type == OT_CONSTANT );
[6c4ff37]358 output << opInfo.symbol;
[51587aa]359 } else {
[6c4ff37]360 output << nameExpr->get_name();
[51587aa]361 } // if
362 }
[51b73452]363
[6c4ff37]364 void CodeGenerator::visit( AddressExpr *addressExpr ) {
365 output << "(&";
[51587aa]366 // this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address
367 if ( VariableExpr *variableExpr = dynamic_cast< VariableExpr* >( addressExpr->get_arg() ) ) {
[6c4ff37]368 output << mangleName( variableExpr->get_var() );
[51587aa]369 } else {
370 addressExpr->get_arg()->accept( *this );
371 } // if
[6c4ff37]372 output << ")";
[51587aa]373 }
374
[6c4ff37]375 void CodeGenerator::visit( CastExpr *castExpr ) {
376 output << "((";
[51587aa]377 if ( castExpr->get_results().empty() ) {
[6c4ff37]378 output << "void" ;
[51587aa]379 } else {
[6c4ff37]380 output << genType( castExpr->get_results().front(), "" );
[51587aa]381 } // if
[6c4ff37]382 output << ")";
[51587aa]383 castExpr->get_arg()->accept( *this );
[6c4ff37]384 output << ")";
[51587aa]385 }
[51b73452]386
[6c4ff37]387 void CodeGenerator::visit( UntypedMemberExpr *memberExpr ) {
[51587aa]388 assert( false );
389 }
[51b73452]390
[6c4ff37]391 void CodeGenerator::visit( MemberExpr *memberExpr ) {
[51587aa]392 memberExpr->get_aggregate()->accept( *this );
[6c4ff37]393 output << "." << mangleName( memberExpr->get_member() );
[51587aa]394 }
[51b73452]395
[6c4ff37]396 void CodeGenerator::visit( VariableExpr *variableExpr ) {
[51587aa]397 OperatorInfo opInfo;
398 if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) {
[6c4ff37]399 output << opInfo.symbol;
[51587aa]400 } else {
[6c4ff37]401 output << mangleName( variableExpr->get_var() );
[51587aa]402 } // if
403 }
[51b73452]404
[6c4ff37]405 void CodeGenerator::visit( ConstantExpr *constantExpr ) {
[51587aa]406 assert( constantExpr->get_constant() );
407 constantExpr->get_constant()->accept( *this );
408 }
[51b73452]409
[6c4ff37]410 void CodeGenerator::visit( SizeofExpr *sizeofExpr ) {
411 output << "sizeof(";
[51587aa]412 if ( sizeofExpr->get_isType() ) {
[6c4ff37]413 output << genType( sizeofExpr->get_type(), "" );
[51587aa]414 } else {
415 sizeofExpr->get_expr()->accept( *this );
416 } // if
[6c4ff37]417 output << ")";
[51587aa]418 }
[51b73452]419
[6c4ff37]420 void CodeGenerator::visit( LogicalExpr *logicalExpr ) {
421 output << "(";
[51587aa]422 logicalExpr->get_arg1()->accept( *this );
423 if ( logicalExpr->get_isAnd() ) {
[6c4ff37]424 output << " && ";
[51587aa]425 } else {
[6c4ff37]426 output << " || ";
[51587aa]427 } // if
428 logicalExpr->get_arg2()->accept( *this );
[6c4ff37]429 output << ")";
[51587aa]430 }
[51b73452]431
[6c4ff37]432 void CodeGenerator::visit( ConditionalExpr *conditionalExpr ) {
433 output << "(";
[51587aa]434 conditionalExpr->get_arg1()->accept( *this );
[6c4ff37]435 output << " ? ";
[51587aa]436 conditionalExpr->get_arg2()->accept( *this );
[6c4ff37]437 output << " : ";
[51587aa]438 conditionalExpr->get_arg3()->accept( *this );
[6c4ff37]439 output << ")";
[51587aa]440 }
[51b73452]441
[6c4ff37]442 void CodeGenerator::visit( CommaExpr *commaExpr ) {
443 output << "(";
[51587aa]444 commaExpr->get_arg1()->accept( *this );
[6c4ff37]445 output << " , ";
[51587aa]446 commaExpr->get_arg2()->accept( *this );
[6c4ff37]447 output << ")";
[51587aa]448 }
[51b73452]449
[6c4ff37]450 void CodeGenerator::visit( TupleExpr *tupleExpr ) {}
[51b73452]451
[6c4ff37]452 void CodeGenerator::visit( TypeExpr *typeExpr ) {}
[2b6c1e0]453
[51587aa]454 //*** Statements
[6c4ff37]455 void CodeGenerator::visit( CompoundStmt *compoundStmt ) {
[51587aa]456 std::list<Statement*> ks = compoundStmt->get_kids();
[2b6c1e0]457 output << "{" << endl;
[51587aa]458
[2b6c1e0]459 cur_indent += CodeGenerator::tabsize;
[51587aa]460
461 for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++) {
[cda48b6]462 output << indent << printLabels( (*i)->get_labels() );
[51587aa]463 (*i)->accept(*this );
[2b6c1e0]464
[6c4ff37]465 output << endl;
[2b6c1e0]466 if ( wantSpacing( *i ) ) {
467 output << endl;
468 }
[51587aa]469 }
[6c4ff37]470 cur_indent -= CodeGenerator::tabsize;
[51587aa]471
[cda48b6]472 output << indent << "}";
[51587aa]473 }
474
[6c4ff37]475 void CodeGenerator::visit( ExprStmt *exprStmt ) {
476 // I don't see why this check is necessary.
477 // If this starts to cause problems then put it back in,
478 // with an explanation
479 assert( exprStmt );
480
481 // if ( exprStmt != 0 ) {
482 exprStmt->get_expr()->accept( *this );
483 output << ";" ;
484 // } // if
[51587aa]485 }
486
[6c4ff37]487 void CodeGenerator::visit( IfStmt *ifStmt ) {
488 output << "if (";
[51587aa]489 ifStmt->get_condition()->accept(*this );
[2b6c1e0]490 output << ") ";
[51587aa]491
492 ifStmt->get_thenPart()->accept(*this );
493
494 if ( ifStmt->get_elsePart() != 0) {
[2b6c1e0]495 output << " else ";
[51587aa]496 ifStmt->get_elsePart()->accept(*this );
497 } // if
498 }
499
[6c4ff37]500 void CodeGenerator::visit( SwitchStmt *switchStmt ) {
501 output << "switch (" ;
[51587aa]502 switchStmt->get_condition()->accept(*this );
[2b6c1e0]503 output << ") ";
[6c4ff37]504
[2b6c1e0]505 output << "{" << std::endl;
[6c4ff37]506 cur_indent += CodeGenerator::tabsize;
[51587aa]507
[6c4ff37]508 acceptAll( switchStmt->get_branches(), *this );
[51587aa]509
[6c4ff37]510 cur_indent -= CodeGenerator::tabsize;
[51587aa]511
[cda48b6]512 output << indent << "}";
[51587aa]513 }
514
[6c4ff37]515 void CodeGenerator::visit( CaseStmt *caseStmt ) {
[cda48b6]516 output << indent;
[eb3261f]517 if ( caseStmt->isDefault()) {
[2b6c1e0]518 output << "default";
[eb3261f]519 } else {
[2b6c1e0]520 output << "case ";
[51587aa]521 caseStmt->get_condition()->accept(*this );
[17cd4eb]522 } // if
[6c4ff37]523 output << ":\n";
524
[51587aa]525 std::list<Statement *> sts = caseStmt->get_statements();
526
[6c4ff37]527 cur_indent += CodeGenerator::tabsize;
[51587aa]528 for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) {
[cda48b6]529 output << indent << printLabels( (*i)->get_labels() ) ;
[51587aa]530 (*i)->accept(*this );
[6c4ff37]531 output << endl;
[51587aa]532 }
[6c4ff37]533 cur_indent -= CodeGenerator::tabsize;
[51587aa]534 }
535
[6c4ff37]536 void CodeGenerator::visit( BranchStmt *branchStmt ) {
[51587aa]537 switch ( branchStmt->get_type()) {
538 case BranchStmt::Goto:
539 if ( ! branchStmt->get_target().empty() )
[6c4ff37]540 output << "goto " << branchStmt->get_target();
[51587aa]541 else {
542 if ( branchStmt->get_computedTarget() != 0 ) {
[6c4ff37]543 output << "goto *";
[51587aa]544 branchStmt->get_computedTarget()->accept( *this );
545 } // if
546 } // if
547 break;
548 case BranchStmt::Break:
[6c4ff37]549 output << "break";
[51587aa]550 break;
551 case BranchStmt::Continue:
[6c4ff37]552 output << "continue";
[51587aa]553 break;
554 }
[2b6c1e0]555 output << ";";
[51587aa]556 }
557
558
[6c4ff37]559 void CodeGenerator::visit( ReturnStmt *returnStmt ) {
560 output << "return ";
[51587aa]561
562 // xxx -- check for null expression;
563 if ( returnStmt->get_expr() ) {
564 returnStmt->get_expr()->accept( *this );
565 } // if
[6c4ff37]566 output << ";";
[51587aa]567 }
568
[6c4ff37]569 void CodeGenerator::visit( WhileStmt *whileStmt ) {
[51587aa]570 if ( whileStmt->get_isDoWhile() )
[6c4ff37]571 output << "do" ;
[51587aa]572 else {
[6c4ff37]573 output << "while (" ;
[51587aa]574 whileStmt->get_condition()->accept(*this );
[6c4ff37]575 output << ")";
[51587aa]576 } // if
[2b6c1e0]577 output << " ";
[51587aa]578
[2b6c1e0]579 output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() );
[51587aa]580 whileStmt->get_body()->accept( *this );
581
[cda48b6]582 output << indent;
[51587aa]583
584 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]585 output << " while (" ;
[51587aa]586 whileStmt->get_condition()->accept(*this );
[6c4ff37]587 output << ");";
[51587aa]588 } // if
589 }
590
[6c4ff37]591 void CodeGenerator::visit( ForStmt *forStmt ) {
[145f1fc]592 // initialization is always hoisted, so don't
593 // bother doing anything with that
594 output << "for (;";
[51587aa]595
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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