source: src/CodeGen/CodeGenerator.cc@ cff1143

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 cff1143 was 721f17a, checked in by Peter A. Buhr <pabuhr@…>, 10 years ago

fix OT_LABELADDRESS warning, parse genric types
  • 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
[721f17a]11// Last Modified By : Peter A. Buhr
12// Last Modified On : Fri Jun 26 16:52:58 2015
13// Update Count : 144
[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:
[721f17a]271 case OT_LABELADDRESS:
272 // there are no intrinsic definitions of 0/1 or label addresses as functions
[51587aa]273 assert( false );
274 }
[17cd4eb]275 } else {
[51587aa]276 varExpr->accept( *this );
[6c4ff37]277 output << "(";
[51587aa]278 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]279 output << ")";
[17cd4eb]280 } // if
[51587aa]281 } else {
282 applicationExpr->get_function()->accept( *this );
[6c4ff37]283 output << "(";
[51587aa]284 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]285 output << ")";
[51587aa]286 } // if
287 }
[51b73452]288
[6c4ff37]289 void CodeGenerator::visit( UntypedExpr *untypedExpr ) {
[51587aa]290 if ( NameExpr *nameExpr = dynamic_cast< NameExpr* >( untypedExpr->get_function() ) ) {
291 OperatorInfo opInfo;
292 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
293 std::list< Expression* >::iterator arg = untypedExpr->get_args().begin();
294 switch ( opInfo.type ) {
295 case OT_INDEX:
296 assert( untypedExpr->get_args().size() == 2 );
297 (*arg++)->accept( *this );
[6c4ff37]298 output << "[";
[51587aa]299 (*arg)->accept( *this );
[6c4ff37]300 output << "]";
[51587aa]301 break;
302
303 case OT_CALL:
304 assert( false );
305 break;
306
307 case OT_PREFIX:
308 case OT_PREFIXASSIGN:
[de62360d]309 case OT_LABELADDRESS:
[51587aa]310 assert( untypedExpr->get_args().size() == 1 );
[6c4ff37]311 output << "(";
312 output << opInfo.symbol;
[51587aa]313 (*arg)->accept( *this );
[6c4ff37]314 output << ")";
[51587aa]315 break;
316
317 case OT_POSTFIX:
318 case OT_POSTFIXASSIGN:
319 assert( untypedExpr->get_args().size() == 1 );
320 (*arg)->accept( *this );
[6c4ff37]321 output << opInfo.symbol;
[51587aa]322 break;
[51b73452]323
[51587aa]324 case OT_INFIX:
325 case OT_INFIXASSIGN:
326 assert( untypedExpr->get_args().size() == 2 );
[6c4ff37]327 output << "(";
[51587aa]328 (*arg++)->accept( *this );
[6c4ff37]329 output << opInfo.symbol;
[51587aa]330 (*arg)->accept( *this );
[6c4ff37]331 output << ")";
[51587aa]332 break;
[de62360d]333
[51587aa]334 case OT_CONSTANT:
335 // there are no intrinsic definitions of 0 or 1 as functions
336 assert( false );
337 }
338 } else {
339 nameExpr->accept( *this );
[6c4ff37]340 output << "(";
[51587aa]341 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
[6c4ff37]342 output << ")";
[51587aa]343 } // if
344 } else {
345 untypedExpr->get_function()->accept( *this );
[6c4ff37]346 output << "(";
[51587aa]347 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
[6c4ff37]348 output << ")";
[51587aa]349 } // if
350 }
[51b73452]351
[6c4ff37]352 void CodeGenerator::visit( NameExpr *nameExpr ) {
[51587aa]353 OperatorInfo opInfo;
354 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
355 assert( opInfo.type == OT_CONSTANT );
[6c4ff37]356 output << opInfo.symbol;
[51587aa]357 } else {
[6c4ff37]358 output << nameExpr->get_name();
[51587aa]359 } // if
360 }
[51b73452]361
[6c4ff37]362 void CodeGenerator::visit( AddressExpr *addressExpr ) {
363 output << "(&";
[51587aa]364 // this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address
365 if ( VariableExpr *variableExpr = dynamic_cast< VariableExpr* >( addressExpr->get_arg() ) ) {
[6c4ff37]366 output << mangleName( variableExpr->get_var() );
[51587aa]367 } else {
368 addressExpr->get_arg()->accept( *this );
369 } // if
[6c4ff37]370 output << ")";
[51587aa]371 }
372
[6c4ff37]373 void CodeGenerator::visit( CastExpr *castExpr ) {
374 output << "((";
[51587aa]375 if ( castExpr->get_results().empty() ) {
[6c4ff37]376 output << "void" ;
[51587aa]377 } else {
[6c4ff37]378 output << genType( castExpr->get_results().front(), "" );
[51587aa]379 } // if
[6c4ff37]380 output << ")";
[51587aa]381 castExpr->get_arg()->accept( *this );
[6c4ff37]382 output << ")";
[51587aa]383 }
[51b73452]384
[6c4ff37]385 void CodeGenerator::visit( UntypedMemberExpr *memberExpr ) {
[51587aa]386 assert( false );
387 }
[51b73452]388
[6c4ff37]389 void CodeGenerator::visit( MemberExpr *memberExpr ) {
[51587aa]390 memberExpr->get_aggregate()->accept( *this );
[6c4ff37]391 output << "." << mangleName( memberExpr->get_member() );
[51587aa]392 }
[51b73452]393
[6c4ff37]394 void CodeGenerator::visit( VariableExpr *variableExpr ) {
[51587aa]395 OperatorInfo opInfo;
396 if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) {
[6c4ff37]397 output << opInfo.symbol;
[51587aa]398 } else {
[6c4ff37]399 output << mangleName( variableExpr->get_var() );
[51587aa]400 } // if
401 }
[51b73452]402
[6c4ff37]403 void CodeGenerator::visit( ConstantExpr *constantExpr ) {
[51587aa]404 assert( constantExpr->get_constant() );
405 constantExpr->get_constant()->accept( *this );
406 }
[51b73452]407
[6c4ff37]408 void CodeGenerator::visit( SizeofExpr *sizeofExpr ) {
409 output << "sizeof(";
[51587aa]410 if ( sizeofExpr->get_isType() ) {
[6c4ff37]411 output << genType( sizeofExpr->get_type(), "" );
[51587aa]412 } else {
413 sizeofExpr->get_expr()->accept( *this );
414 } // if
[6c4ff37]415 output << ")";
[51587aa]416 }
[51b73452]417
[6c4ff37]418 void CodeGenerator::visit( LogicalExpr *logicalExpr ) {
419 output << "(";
[51587aa]420 logicalExpr->get_arg1()->accept( *this );
421 if ( logicalExpr->get_isAnd() ) {
[6c4ff37]422 output << " && ";
[51587aa]423 } else {
[6c4ff37]424 output << " || ";
[51587aa]425 } // if
426 logicalExpr->get_arg2()->accept( *this );
[6c4ff37]427 output << ")";
[51587aa]428 }
[51b73452]429
[6c4ff37]430 void CodeGenerator::visit( ConditionalExpr *conditionalExpr ) {
431 output << "(";
[51587aa]432 conditionalExpr->get_arg1()->accept( *this );
[6c4ff37]433 output << " ? ";
[51587aa]434 conditionalExpr->get_arg2()->accept( *this );
[6c4ff37]435 output << " : ";
[51587aa]436 conditionalExpr->get_arg3()->accept( *this );
[6c4ff37]437 output << ")";
[51587aa]438 }
[51b73452]439
[6c4ff37]440 void CodeGenerator::visit( CommaExpr *commaExpr ) {
441 output << "(";
[51587aa]442 commaExpr->get_arg1()->accept( *this );
[6c4ff37]443 output << " , ";
[51587aa]444 commaExpr->get_arg2()->accept( *this );
[6c4ff37]445 output << ")";
[51587aa]446 }
[51b73452]447
[6c4ff37]448 void CodeGenerator::visit( TupleExpr *tupleExpr ) {}
[51b73452]449
[6c4ff37]450 void CodeGenerator::visit( TypeExpr *typeExpr ) {}
[2b6c1e0]451
[51587aa]452 //*** Statements
[6c4ff37]453 void CodeGenerator::visit( CompoundStmt *compoundStmt ) {
[51587aa]454 std::list<Statement*> ks = compoundStmt->get_kids();
[2b6c1e0]455 output << "{" << endl;
[51587aa]456
[2b6c1e0]457 cur_indent += CodeGenerator::tabsize;
[51587aa]458
459 for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++) {
[cda48b6]460 output << indent << printLabels( (*i)->get_labels() );
[51587aa]461 (*i)->accept(*this );
[2b6c1e0]462
[6c4ff37]463 output << endl;
[2b6c1e0]464 if ( wantSpacing( *i ) ) {
465 output << endl;
466 }
[51587aa]467 }
[6c4ff37]468 cur_indent -= CodeGenerator::tabsize;
[51587aa]469
[cda48b6]470 output << indent << "}";
[51587aa]471 }
472
[6c4ff37]473 void CodeGenerator::visit( ExprStmt *exprStmt ) {
474 // I don't see why this check is necessary.
475 // If this starts to cause problems then put it back in,
476 // with an explanation
477 assert( exprStmt );
478
479 // if ( exprStmt != 0 ) {
480 exprStmt->get_expr()->accept( *this );
481 output << ";" ;
482 // } // if
[51587aa]483 }
484
[6c4ff37]485 void CodeGenerator::visit( IfStmt *ifStmt ) {
486 output << "if (";
[51587aa]487 ifStmt->get_condition()->accept(*this );
[2b6c1e0]488 output << ") ";
[51587aa]489
490 ifStmt->get_thenPart()->accept(*this );
491
492 if ( ifStmt->get_elsePart() != 0) {
[2b6c1e0]493 output << " else ";
[51587aa]494 ifStmt->get_elsePart()->accept(*this );
495 } // if
496 }
497
[6c4ff37]498 void CodeGenerator::visit( SwitchStmt *switchStmt ) {
499 output << "switch (" ;
[51587aa]500 switchStmt->get_condition()->accept(*this );
[2b6c1e0]501 output << ") ";
[6c4ff37]502
[2b6c1e0]503 output << "{" << std::endl;
[6c4ff37]504 cur_indent += CodeGenerator::tabsize;
[51587aa]505
[6c4ff37]506 acceptAll( switchStmt->get_branches(), *this );
[51587aa]507
[6c4ff37]508 cur_indent -= CodeGenerator::tabsize;
[51587aa]509
[cda48b6]510 output << indent << "}";
[51587aa]511 }
512
[6c4ff37]513 void CodeGenerator::visit( CaseStmt *caseStmt ) {
[cda48b6]514 output << indent;
[eb3261f]515 if ( caseStmt->isDefault()) {
[2b6c1e0]516 output << "default";
[eb3261f]517 } else {
[2b6c1e0]518 output << "case ";
[51587aa]519 caseStmt->get_condition()->accept(*this );
[17cd4eb]520 } // if
[6c4ff37]521 output << ":\n";
522
[51587aa]523 std::list<Statement *> sts = caseStmt->get_statements();
524
[6c4ff37]525 cur_indent += CodeGenerator::tabsize;
[51587aa]526 for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) {
[cda48b6]527 output << indent << printLabels( (*i)->get_labels() ) ;
[51587aa]528 (*i)->accept(*this );
[6c4ff37]529 output << endl;
[51587aa]530 }
[6c4ff37]531 cur_indent -= CodeGenerator::tabsize;
[51587aa]532 }
533
[6c4ff37]534 void CodeGenerator::visit( BranchStmt *branchStmt ) {
[51587aa]535 switch ( branchStmt->get_type()) {
536 case BranchStmt::Goto:
537 if ( ! branchStmt->get_target().empty() )
[6c4ff37]538 output << "goto " << branchStmt->get_target();
[51587aa]539 else {
540 if ( branchStmt->get_computedTarget() != 0 ) {
[6c4ff37]541 output << "goto *";
[51587aa]542 branchStmt->get_computedTarget()->accept( *this );
543 } // if
544 } // if
545 break;
546 case BranchStmt::Break:
[6c4ff37]547 output << "break";
[51587aa]548 break;
549 case BranchStmt::Continue:
[6c4ff37]550 output << "continue";
[51587aa]551 break;
552 }
[2b6c1e0]553 output << ";";
[51587aa]554 }
555
556
[6c4ff37]557 void CodeGenerator::visit( ReturnStmt *returnStmt ) {
558 output << "return ";
[51587aa]559
560 // xxx -- check for null expression;
561 if ( returnStmt->get_expr() ) {
562 returnStmt->get_expr()->accept( *this );
563 } // if
[6c4ff37]564 output << ";";
[51587aa]565 }
566
[6c4ff37]567 void CodeGenerator::visit( WhileStmt *whileStmt ) {
[51587aa]568 if ( whileStmt->get_isDoWhile() )
[6c4ff37]569 output << "do" ;
[51587aa]570 else {
[6c4ff37]571 output << "while (" ;
[51587aa]572 whileStmt->get_condition()->accept(*this );
[6c4ff37]573 output << ")";
[51587aa]574 } // if
[2b6c1e0]575 output << " ";
[51587aa]576
[2b6c1e0]577 output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() );
[51587aa]578 whileStmt->get_body()->accept( *this );
579
[cda48b6]580 output << indent;
[51587aa]581
582 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]583 output << " while (" ;
[51587aa]584 whileStmt->get_condition()->accept(*this );
[6c4ff37]585 output << ");";
[51587aa]586 } // if
587 }
588
[6c4ff37]589 void CodeGenerator::visit( ForStmt *forStmt ) {
590 output << "for (";
[51587aa]591
592 if ( forStmt->get_initialization() != 0 )
593 forStmt->get_initialization()->accept( *this );
594 else
[6c4ff37]595 output << ";";
596
[51587aa]597 if ( forStmt->get_condition() != 0 )
598 forStmt->get_condition()->accept( *this );
[6c4ff37]599 output << ";";
[51587aa]600
601 if ( forStmt->get_increment() != 0 )
602 forStmt->get_increment()->accept( *this );
[2b6c1e0]603 output << ") ";
[51587aa]604
605 if ( forStmt->get_body() != 0 ) {
[2b6c1e0]606 output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() );
[51587aa]607 forStmt->get_body()->accept( *this );
608 } // if
609 }
610
[6c4ff37]611 void CodeGenerator::visit( NullStmt *nullStmt ) {
[cda48b6]612 //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() );
[6c4ff37]613 output << "/* null statement */ ;";
[51587aa]614 }
615
[6c4ff37]616 void CodeGenerator::visit( DeclStmt *declStmt ) {
[51587aa]617 declStmt->get_decl()->accept( *this );
618
619 if ( doSemicolon( declStmt->get_decl() ) ) {
[6c4ff37]620 output << ";";
[51587aa]621 } // if
622 }
623
[6c4ff37]624 std::string CodeGenerator::printLabels( std::list< Label > &l ) {
[51587aa]625 std::string str( "" );
[6c4ff37]626 l.unique(); // assumes a sorted list. Why not use set?
[51587aa]627
628 for ( std::list< Label >::iterator i = l.begin(); i != l.end(); i++ )
629 str += *i + ": ";
630
631 return str;
632 }
633
[6c4ff37]634 void CodeGenerator::handleStorageClass( Declaration *decl ) {
[51587aa]635 switch ( decl->get_storageClass() ) {
[68cd1ce]636 case DeclarationNode::Extern:
[6c4ff37]637 output << "extern ";
[51587aa]638 break;
[68cd1ce]639 case DeclarationNode::Static:
[6c4ff37]640 output << "static ";
[51587aa]641 break;
[68cd1ce]642 case DeclarationNode::Auto:
[51587aa]643 // silently drop storage class
644 break;
[68cd1ce]645 case DeclarationNode::Register:
[6c4ff37]646 output << "register ";
[51587aa]647 break;
[68cd1ce]648 case DeclarationNode::Inline:
[de62360d]649 output << "inline ";
[f38c8d9]650 break;
[68cd1ce]651 case DeclarationNode::Fortran:
652 output << "fortran ";
653 break;
654 case DeclarationNode::Noreturn:
655 output << "_Noreturn ";
656 break;
657 case DeclarationNode::Threadlocal:
658 output << "_Thread_local ";
659 break;
660 case DeclarationNode::NoStorageClass:
[f38c8d9]661 break;
[843054c2]662 } // switch
[51587aa]663 }
[51b73452]664} // namespace CodeGen
[51587aa]665
666// Local Variables: //
667// tab-width: 4 //
668// mode: c++ //
669// compile-command: "make install" //
670// End: //
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