source: src/CodeGen/CodeGenerator.cc@ 35304009

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 35304009 was 47534159, checked in by Aaron Moss <a3moss@…>, 10 years ago

Added support for alignof expressions for everything but polymorphic types
  • Property mode set to 100644
File size: 20.3 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
[f32c7f4]11// Last Modified By : Rob Schluntz
[971ae89]12// Last Modified On : Thu Sep 17 15:24:08 2015
13// Update Count : 231
[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
[7f5566b]54 CodeGenerator::CodeGenerator( std::ostream &os ) : indent( *this), cur_indent( 0 ), insideFunction( false ), output( os ) { }
[cda48b6]55
56 CodeGenerator::CodeGenerator( std::ostream &os, std::string init, int indentation, bool infunp )
[7f5566b]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 )
[7f5566b]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() ) {
[7f5566b]93 functionDecl->get_statements()->accept( *this );
[51587aa]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;
[7f5566b]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 << " = ";
[7f5566b]161 obj->get_init()->accept( *this );
[51587aa]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
[e45215c]188 void CodeGenerator::printDesignators( std::list< Expression * > & designators ) {
189 typedef std::list< Expression * > DesignatorList;
190 if ( designators.size() == 0 ) return;
191 for ( DesignatorList::iterator iter = designators.begin(); iter != designators.end(); ++iter ) {
[8a4da06]192 if ( dynamic_cast< NameExpr * >( *iter ) ) {
[f32c7f4]193 // if expression is a name, then initializing aggregate member
194 output << ".";
195 (*iter)->accept( *this );
196 } else {
197 // if not a simple name, it has to be a constant expression, i.e. an array designator
[e45215c]198 output << "[";
199 (*iter)->accept( *this );
200 output << "]";
201 }
202 }
203 output << " = ";
204 }
205
[6c4ff37]206 void CodeGenerator::visit( SingleInit *init ) {
[e45215c]207 printDesignators( init->get_designators() );
[51587aa]208 init->get_value()->accept( *this );
209 }
210
[6c4ff37]211 void CodeGenerator::visit( ListInit *init ) {
[e45215c]212 printDesignators( init->get_designators() );
[6c4ff37]213 output << "{ ";
[51587aa]214 genCommaList( init->begin_initializers(), init->end_initializers() );
[6c4ff37]215 output << " }";
[51587aa]216 }
217
[6c4ff37]218 void CodeGenerator::visit( Constant *constant ) {
219 output << constant->get_value() ;
[51587aa]220 }
221
222 //*** Expressions
[6c4ff37]223 void CodeGenerator::visit( ApplicationExpr *applicationExpr ) {
[51587aa]224 if ( VariableExpr *varExpr = dynamic_cast< VariableExpr* >( applicationExpr->get_function() ) ) {
225 OperatorInfo opInfo;
226 if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( varExpr->get_var()->get_name(), opInfo ) ) {
227 std::list< Expression* >::iterator arg = applicationExpr->get_args().begin();
228 switch ( opInfo.type ) {
229 case OT_PREFIXASSIGN:
230 case OT_POSTFIXASSIGN:
231 case OT_INFIXASSIGN:
232 {
233 assert( arg != applicationExpr->get_args().end() );
234 if ( AddressExpr *addrExpr = dynamic_cast< AddressExpr * >( *arg ) ) {
235
236 *arg = addrExpr->get_arg();
237 } else {
238 UntypedExpr *newExpr = new UntypedExpr( new NameExpr( "*?" ) );
239 newExpr->get_args().push_back( *arg );
240 *arg = newExpr;
241 } // if
242 break;
243 }
244
245 default:
246 // do nothing
247 ;
248 }
249
250 switch ( opInfo.type ) {
251 case OT_INDEX:
252 assert( applicationExpr->get_args().size() == 2 );
253 (*arg++)->accept( *this );
[6c4ff37]254 output << "[";
[51587aa]255 (*arg)->accept( *this );
[6c4ff37]256 output << "]";
[51587aa]257 break;
258
259 case OT_CALL:
260 // there are no intrinsic definitions of the function call operator
261 assert( false );
262 break;
263
264 case OT_PREFIX:
265 case OT_PREFIXASSIGN:
266 assert( applicationExpr->get_args().size() == 1 );
[6c4ff37]267 output << "(";
268 output << opInfo.symbol;
[51587aa]269 (*arg)->accept( *this );
[6c4ff37]270 output << ")";
[51587aa]271 break;
272
273 case OT_POSTFIX:
274 case OT_POSTFIXASSIGN:
275 assert( applicationExpr->get_args().size() == 1 );
276 (*arg)->accept( *this );
[6c4ff37]277 output << opInfo.symbol;
[51587aa]278 break;
279
280 case OT_INFIX:
281 case OT_INFIXASSIGN:
282 assert( applicationExpr->get_args().size() == 2 );
[6c4ff37]283 output << "(";
[51587aa]284 (*arg++)->accept( *this );
[6c4ff37]285 output << opInfo.symbol;
[51587aa]286 (*arg)->accept( *this );
[6c4ff37]287 output << ")";
[51587aa]288 break;
289
290 case OT_CONSTANT:
[721f17a]291 case OT_LABELADDRESS:
292 // there are no intrinsic definitions of 0/1 or label addresses as functions
[51587aa]293 assert( false );
294 }
[17cd4eb]295 } else {
[51587aa]296 varExpr->accept( *this );
[6c4ff37]297 output << "(";
[51587aa]298 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]299 output << ")";
[17cd4eb]300 } // if
[51587aa]301 } else {
302 applicationExpr->get_function()->accept( *this );
[6c4ff37]303 output << "(";
[51587aa]304 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]305 output << ")";
[51587aa]306 } // if
307 }
[51b73452]308
[6c4ff37]309 void CodeGenerator::visit( UntypedExpr *untypedExpr ) {
[51587aa]310 if ( NameExpr *nameExpr = dynamic_cast< NameExpr* >( untypedExpr->get_function() ) ) {
311 OperatorInfo opInfo;
312 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
313 std::list< Expression* >::iterator arg = untypedExpr->get_args().begin();
314 switch ( opInfo.type ) {
315 case OT_INDEX:
316 assert( untypedExpr->get_args().size() == 2 );
317 (*arg++)->accept( *this );
[6c4ff37]318 output << "[";
[51587aa]319 (*arg)->accept( *this );
[6c4ff37]320 output << "]";
[51587aa]321 break;
322
323 case OT_CALL:
324 assert( false );
325 break;
326
327 case OT_PREFIX:
328 case OT_PREFIXASSIGN:
[de62360d]329 case OT_LABELADDRESS:
[51587aa]330 assert( untypedExpr->get_args().size() == 1 );
[6c4ff37]331 output << "(";
332 output << opInfo.symbol;
[51587aa]333 (*arg)->accept( *this );
[6c4ff37]334 output << ")";
[51587aa]335 break;
336
337 case OT_POSTFIX:
338 case OT_POSTFIXASSIGN:
339 assert( untypedExpr->get_args().size() == 1 );
340 (*arg)->accept( *this );
[6c4ff37]341 output << opInfo.symbol;
[51587aa]342 break;
[51b73452]343
[51587aa]344 case OT_INFIX:
345 case OT_INFIXASSIGN:
346 assert( untypedExpr->get_args().size() == 2 );
[6c4ff37]347 output << "(";
[51587aa]348 (*arg++)->accept( *this );
[6c4ff37]349 output << opInfo.symbol;
[51587aa]350 (*arg)->accept( *this );
[6c4ff37]351 output << ")";
[51587aa]352 break;
[de62360d]353
[51587aa]354 case OT_CONSTANT:
355 // there are no intrinsic definitions of 0 or 1 as functions
356 assert( false );
357 }
358 } else {
359 nameExpr->accept( *this );
[6c4ff37]360 output << "(";
[51587aa]361 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
[6c4ff37]362 output << ")";
[51587aa]363 } // if
364 } else {
365 untypedExpr->get_function()->accept( *this );
[6c4ff37]366 output << "(";
[51587aa]367 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
[6c4ff37]368 output << ")";
[51587aa]369 } // if
370 }
[51b73452]371
[6c4ff37]372 void CodeGenerator::visit( NameExpr *nameExpr ) {
[51587aa]373 OperatorInfo opInfo;
374 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
375 assert( opInfo.type == OT_CONSTANT );
[6c4ff37]376 output << opInfo.symbol;
[51587aa]377 } else {
[6c4ff37]378 output << nameExpr->get_name();
[51587aa]379 } // if
380 }
[51b73452]381
[6c4ff37]382 void CodeGenerator::visit( AddressExpr *addressExpr ) {
383 output << "(&";
[51587aa]384 // this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address
385 if ( VariableExpr *variableExpr = dynamic_cast< VariableExpr* >( addressExpr->get_arg() ) ) {
[6c4ff37]386 output << mangleName( variableExpr->get_var() );
[51587aa]387 } else {
388 addressExpr->get_arg()->accept( *this );
389 } // if
[6c4ff37]390 output << ")";
[51587aa]391 }
392
[6c4ff37]393 void CodeGenerator::visit( CastExpr *castExpr ) {
[76b48f1]394 // if the cast is to an lvalue type, then the cast
395 // should be dropped, since the result of a cast is
396 // never an lvalue in C
397 if ( castExpr->get_results().front()->get_isLvalue() ) {
398 castExpr->get_arg()->accept( *this );
[51587aa]399 } else {
[76b48f1]400 output << "((";
401 if ( castExpr->get_results().empty() ) {
402 output << "void" ;
403 } else {
404 output << genType( castExpr->get_results().front(), "" );
405 } // if
406 output << ")";
407 castExpr->get_arg()->accept( *this );
408 output << ")";
409 }
[51587aa]410 }
[51b73452]411
[6c4ff37]412 void CodeGenerator::visit( UntypedMemberExpr *memberExpr ) {
[51587aa]413 assert( false );
414 }
[51b73452]415
[6c4ff37]416 void CodeGenerator::visit( MemberExpr *memberExpr ) {
[51587aa]417 memberExpr->get_aggregate()->accept( *this );
[6c4ff37]418 output << "." << mangleName( memberExpr->get_member() );
[51587aa]419 }
[51b73452]420
[6c4ff37]421 void CodeGenerator::visit( VariableExpr *variableExpr ) {
[51587aa]422 OperatorInfo opInfo;
423 if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) {
[6c4ff37]424 output << opInfo.symbol;
[51587aa]425 } else {
[6c4ff37]426 output << mangleName( variableExpr->get_var() );
[51587aa]427 } // if
428 }
[51b73452]429
[6c4ff37]430 void CodeGenerator::visit( ConstantExpr *constantExpr ) {
[51587aa]431 assert( constantExpr->get_constant() );
432 constantExpr->get_constant()->accept( *this );
433 }
[51b73452]434
[6c4ff37]435 void CodeGenerator::visit( SizeofExpr *sizeofExpr ) {
436 output << "sizeof(";
[51587aa]437 if ( sizeofExpr->get_isType() ) {
[6c4ff37]438 output << genType( sizeofExpr->get_type(), "" );
[51587aa]439 } else {
440 sizeofExpr->get_expr()->accept( *this );
441 } // if
[6c4ff37]442 output << ")";
[51587aa]443 }
[47534159]444
445 void CodeGenerator::visit( AlignofExpr *sizeofExpr ) {
446 // use GCC extension to avoid bumping std to C11
447 output << "__alignof__(";
448 if ( sizeofExpr->get_isType() ) {
449 output << genType( sizeofExpr->get_type(), "" );
450 } else {
451 sizeofExpr->get_expr()->accept( *this );
452 } // if
453 output << ")";
454 }
[51b73452]455
[6c4ff37]456 void CodeGenerator::visit( LogicalExpr *logicalExpr ) {
457 output << "(";
[51587aa]458 logicalExpr->get_arg1()->accept( *this );
459 if ( logicalExpr->get_isAnd() ) {
[6c4ff37]460 output << " && ";
[51587aa]461 } else {
[6c4ff37]462 output << " || ";
[51587aa]463 } // if
464 logicalExpr->get_arg2()->accept( *this );
[6c4ff37]465 output << ")";
[51587aa]466 }
[51b73452]467
[6c4ff37]468 void CodeGenerator::visit( ConditionalExpr *conditionalExpr ) {
469 output << "(";
[51587aa]470 conditionalExpr->get_arg1()->accept( *this );
[6c4ff37]471 output << " ? ";
[51587aa]472 conditionalExpr->get_arg2()->accept( *this );
[6c4ff37]473 output << " : ";
[51587aa]474 conditionalExpr->get_arg3()->accept( *this );
[6c4ff37]475 output << ")";
[51587aa]476 }
[51b73452]477
[6c4ff37]478 void CodeGenerator::visit( CommaExpr *commaExpr ) {
479 output << "(";
[51587aa]480 commaExpr->get_arg1()->accept( *this );
[6c4ff37]481 output << " , ";
[51587aa]482 commaExpr->get_arg2()->accept( *this );
[6c4ff37]483 output << ")";
[51587aa]484 }
[51b73452]485
[6c4ff37]486 void CodeGenerator::visit( TupleExpr *tupleExpr ) {}
[51b73452]487
[6c4ff37]488 void CodeGenerator::visit( TypeExpr *typeExpr ) {}
[2b6c1e0]489
[7f5566b]490 void CodeGenerator::visit( AsmExpr *asmExpr ) {
491 if ( asmExpr->get_inout() ) {
492 output << "[ ";
493 asmExpr->get_inout()->accept( *this );
494 output << " ] ";
495 } // if
496 asmExpr->get_constraint()->accept( *this );
497 output << " ( ";
498 asmExpr->get_operand()->accept( *this );
499 output << " )";
500 }
501
[51587aa]502 //*** Statements
[6c4ff37]503 void CodeGenerator::visit( CompoundStmt *compoundStmt ) {
[51587aa]504 std::list<Statement*> ks = compoundStmt->get_kids();
[2b6c1e0]505 output << "{" << endl;
[51587aa]506
[2b6c1e0]507 cur_indent += CodeGenerator::tabsize;
[51587aa]508
[7f5566b]509 for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) {
[cda48b6]510 output << indent << printLabels( (*i)->get_labels() );
[7f5566b]511 (*i)->accept( *this );
[2b6c1e0]512
[6c4ff37]513 output << endl;
[2b6c1e0]514 if ( wantSpacing( *i ) ) {
515 output << endl;
516 }
[51587aa]517 }
[6c4ff37]518 cur_indent -= CodeGenerator::tabsize;
[51587aa]519
[cda48b6]520 output << indent << "}";
[51587aa]521 }
522
[6c4ff37]523 void CodeGenerator::visit( ExprStmt *exprStmt ) {
524 // I don't see why this check is necessary.
525 // If this starts to cause problems then put it back in,
526 // with an explanation
527 assert( exprStmt );
528
529 // if ( exprStmt != 0 ) {
530 exprStmt->get_expr()->accept( *this );
531 output << ";" ;
532 // } // if
[51587aa]533 }
534
[7f5566b]535 void CodeGenerator::visit( AsmStmt *asmStmt ) {
536 output << "asm ";
537 if ( asmStmt->get_voltile() ) output << "volatile ";
538 if ( ! asmStmt->get_gotolabels().empty() ) output << "goto ";
539 output << "( ";
540 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
541 output << " : ";
542 genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() );
543 output << " : ";
544 genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() );
545 output << " : ";
546 genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() );
547 if ( ! asmStmt->get_gotolabels().empty() ) {
548 output << " : ";
549 for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) {
550 output << *begin++;
551 if ( begin == asmStmt->get_gotolabels().end() ) break;
552 output << ", ";
553 } // for
554 } // if
555 output << " );" ;
556 }
557
[6c4ff37]558 void CodeGenerator::visit( IfStmt *ifStmt ) {
[7f5566b]559 output << "if ( ";
560 ifStmt->get_condition()->accept( *this );
561 output << " ) ";
[51587aa]562
[7f5566b]563 ifStmt->get_thenPart()->accept( *this );
[51587aa]564
565 if ( ifStmt->get_elsePart() != 0) {
[2b6c1e0]566 output << " else ";
[7f5566b]567 ifStmt->get_elsePart()->accept( *this );
[51587aa]568 } // if
569 }
570
[6c4ff37]571 void CodeGenerator::visit( SwitchStmt *switchStmt ) {
[7f5566b]572 output << "switch ( " ;
573 switchStmt->get_condition()->accept( *this );
574 output << " ) ";
[6c4ff37]575
[2b6c1e0]576 output << "{" << std::endl;
[6c4ff37]577 cur_indent += CodeGenerator::tabsize;
[51587aa]578
[6c4ff37]579 acceptAll( switchStmt->get_branches(), *this );
[51587aa]580
[6c4ff37]581 cur_indent -= CodeGenerator::tabsize;
[51587aa]582
[cda48b6]583 output << indent << "}";
[51587aa]584 }
585
[6c4ff37]586 void CodeGenerator::visit( CaseStmt *caseStmt ) {
[cda48b6]587 output << indent;
[eb3261f]588 if ( caseStmt->isDefault()) {
[2b6c1e0]589 output << "default";
[eb3261f]590 } else {
[2b6c1e0]591 output << "case ";
[7f5566b]592 caseStmt->get_condition()->accept( *this );
[17cd4eb]593 } // if
[6c4ff37]594 output << ":\n";
595
[51587aa]596 std::list<Statement *> sts = caseStmt->get_statements();
597
[6c4ff37]598 cur_indent += CodeGenerator::tabsize;
[51587aa]599 for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) {
[cda48b6]600 output << indent << printLabels( (*i)->get_labels() ) ;
[7f5566b]601 (*i)->accept( *this );
[6c4ff37]602 output << endl;
[51587aa]603 }
[6c4ff37]604 cur_indent -= CodeGenerator::tabsize;
[51587aa]605 }
606
[6c4ff37]607 void CodeGenerator::visit( BranchStmt *branchStmt ) {
[51587aa]608 switch ( branchStmt->get_type()) {
609 case BranchStmt::Goto:
610 if ( ! branchStmt->get_target().empty() )
[6c4ff37]611 output << "goto " << branchStmt->get_target();
[51587aa]612 else {
613 if ( branchStmt->get_computedTarget() != 0 ) {
[6c4ff37]614 output << "goto *";
[51587aa]615 branchStmt->get_computedTarget()->accept( *this );
616 } // if
617 } // if
618 break;
619 case BranchStmt::Break:
[6c4ff37]620 output << "break";
[51587aa]621 break;
622 case BranchStmt::Continue:
[6c4ff37]623 output << "continue";
[51587aa]624 break;
625 }
[2b6c1e0]626 output << ";";
[51587aa]627 }
628
629
[6c4ff37]630 void CodeGenerator::visit( ReturnStmt *returnStmt ) {
631 output << "return ";
[51587aa]632
633 // xxx -- check for null expression;
634 if ( returnStmt->get_expr() ) {
635 returnStmt->get_expr()->accept( *this );
636 } // if
[6c4ff37]637 output << ";";
[51587aa]638 }
639
[6c4ff37]640 void CodeGenerator::visit( WhileStmt *whileStmt ) {
[51587aa]641 if ( whileStmt->get_isDoWhile() )
[6c4ff37]642 output << "do" ;
[51587aa]643 else {
[6c4ff37]644 output << "while (" ;
[7f5566b]645 whileStmt->get_condition()->accept( *this );
[6c4ff37]646 output << ")";
[51587aa]647 } // if
[2b6c1e0]648 output << " ";
[51587aa]649
[2b6c1e0]650 output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() );
[51587aa]651 whileStmt->get_body()->accept( *this );
652
[cda48b6]653 output << indent;
[51587aa]654
655 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]656 output << " while (" ;
[7f5566b]657 whileStmt->get_condition()->accept( *this );
[6c4ff37]658 output << ");";
[51587aa]659 } // if
660 }
661
[6c4ff37]662 void CodeGenerator::visit( ForStmt *forStmt ) {
[145f1fc]663 // initialization is always hoisted, so don't
664 // bother doing anything with that
665 output << "for (;";
[51587aa]666
667 if ( forStmt->get_condition() != 0 )
668 forStmt->get_condition()->accept( *this );
[6c4ff37]669 output << ";";
[51587aa]670
671 if ( forStmt->get_increment() != 0 )
672 forStmt->get_increment()->accept( *this );
[2b6c1e0]673 output << ") ";
[51587aa]674
675 if ( forStmt->get_body() != 0 ) {
[2b6c1e0]676 output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() );
[51587aa]677 forStmt->get_body()->accept( *this );
678 } // if
679 }
680
[6c4ff37]681 void CodeGenerator::visit( NullStmt *nullStmt ) {
[cda48b6]682 //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() );
[6c4ff37]683 output << "/* null statement */ ;";
[51587aa]684 }
685
[6c4ff37]686 void CodeGenerator::visit( DeclStmt *declStmt ) {
[51587aa]687 declStmt->get_decl()->accept( *this );
688
689 if ( doSemicolon( declStmt->get_decl() ) ) {
[6c4ff37]690 output << ";";
[51587aa]691 } // if
692 }
693
[6c4ff37]694 std::string CodeGenerator::printLabels( std::list< Label > &l ) {
[51587aa]695 std::string str( "" );
[6c4ff37]696 l.unique(); // assumes a sorted list. Why not use set?
[51587aa]697
698 for ( std::list< Label >::iterator i = l.begin(); i != l.end(); i++ )
699 str += *i + ": ";
700
701 return str;
702 }
703
[6c4ff37]704 void CodeGenerator::handleStorageClass( Declaration *decl ) {
[51587aa]705 switch ( decl->get_storageClass() ) {
[68cd1ce]706 case DeclarationNode::Extern:
[6c4ff37]707 output << "extern ";
[51587aa]708 break;
[68cd1ce]709 case DeclarationNode::Static:
[6c4ff37]710 output << "static ";
[51587aa]711 break;
[68cd1ce]712 case DeclarationNode::Auto:
[51587aa]713 // silently drop storage class
714 break;
[68cd1ce]715 case DeclarationNode::Register:
[6c4ff37]716 output << "register ";
[51587aa]717 break;
[68cd1ce]718 case DeclarationNode::Inline:
[de62360d]719 output << "inline ";
[f38c8d9]720 break;
[68cd1ce]721 case DeclarationNode::Fortran:
722 output << "fortran ";
723 break;
724 case DeclarationNode::Noreturn:
725 output << "_Noreturn ";
726 break;
727 case DeclarationNode::Threadlocal:
728 output << "_Thread_local ";
729 break;
730 case DeclarationNode::NoStorageClass:
[f38c8d9]731 break;
[843054c2]732 } // switch
[51587aa]733 }
[51b73452]734} // namespace CodeGen
[51587aa]735
736// Local Variables: //
737// tab-width: 4 //
738// mode: c++ //
739// compile-command: "make install" //
740// End: //
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