source: src/CodeGen/CodeGenerator.cc@ b762122

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 b762122 was 1840193, checked in by Rob Schluntz <rschlunt@…>, 10 years ago

adding constructor and destructor cases for codegen calls
  • Property mode set to 100644
File size: 20.1 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
[1840193]12// Last Modified On : Thu Sep 17 15:25:58 2015
13// Update Count : 233
[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:
[2794fff]260 case OT_CTOR:
261 case OT_DTOR:
262 // there are no intrinsic definitions of the function call operator or constructors or destructors
[51587aa]263 assert( false );
264 break;
265
266 case OT_PREFIX:
267 case OT_PREFIXASSIGN:
268 assert( applicationExpr->get_args().size() == 1 );
[6c4ff37]269 output << "(";
270 output << opInfo.symbol;
[51587aa]271 (*arg)->accept( *this );
[6c4ff37]272 output << ")";
[51587aa]273 break;
274
275 case OT_POSTFIX:
276 case OT_POSTFIXASSIGN:
277 assert( applicationExpr->get_args().size() == 1 );
278 (*arg)->accept( *this );
[6c4ff37]279 output << opInfo.symbol;
[51587aa]280 break;
281
282 case OT_INFIX:
283 case OT_INFIXASSIGN:
284 assert( applicationExpr->get_args().size() == 2 );
[6c4ff37]285 output << "(";
[51587aa]286 (*arg++)->accept( *this );
[6c4ff37]287 output << opInfo.symbol;
[51587aa]288 (*arg)->accept( *this );
[6c4ff37]289 output << ")";
[51587aa]290 break;
291
292 case OT_CONSTANT:
[721f17a]293 case OT_LABELADDRESS:
294 // there are no intrinsic definitions of 0/1 or label addresses as functions
[51587aa]295 assert( false );
296 }
[17cd4eb]297 } else {
[51587aa]298 varExpr->accept( *this );
[6c4ff37]299 output << "(";
[51587aa]300 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]301 output << ")";
[17cd4eb]302 } // if
[51587aa]303 } else {
304 applicationExpr->get_function()->accept( *this );
[6c4ff37]305 output << "(";
[51587aa]306 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]307 output << ")";
[51587aa]308 } // if
309 }
[51b73452]310
[6c4ff37]311 void CodeGenerator::visit( UntypedExpr *untypedExpr ) {
[51587aa]312 if ( NameExpr *nameExpr = dynamic_cast< NameExpr* >( untypedExpr->get_function() ) ) {
313 OperatorInfo opInfo;
314 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
315 std::list< Expression* >::iterator arg = untypedExpr->get_args().begin();
316 switch ( opInfo.type ) {
317 case OT_INDEX:
318 assert( untypedExpr->get_args().size() == 2 );
319 (*arg++)->accept( *this );
[6c4ff37]320 output << "[";
[51587aa]321 (*arg)->accept( *this );
[6c4ff37]322 output << "]";
[51587aa]323 break;
324
325 case OT_CALL:
[1840193]326 case OT_CTOR:
327 case OT_DTOR:
[51587aa]328 assert( false );
329 break;
330
331 case OT_PREFIX:
332 case OT_PREFIXASSIGN:
[de62360d]333 case OT_LABELADDRESS:
[51587aa]334 assert( untypedExpr->get_args().size() == 1 );
[6c4ff37]335 output << "(";
336 output << opInfo.symbol;
[51587aa]337 (*arg)->accept( *this );
[6c4ff37]338 output << ")";
[51587aa]339 break;
340
341 case OT_POSTFIX:
342 case OT_POSTFIXASSIGN:
343 assert( untypedExpr->get_args().size() == 1 );
344 (*arg)->accept( *this );
[6c4ff37]345 output << opInfo.symbol;
[51587aa]346 break;
[51b73452]347
[51587aa]348 case OT_INFIX:
349 case OT_INFIXASSIGN:
350 assert( untypedExpr->get_args().size() == 2 );
[6c4ff37]351 output << "(";
[51587aa]352 (*arg++)->accept( *this );
[6c4ff37]353 output << opInfo.symbol;
[51587aa]354 (*arg)->accept( *this );
[6c4ff37]355 output << ")";
[51587aa]356 break;
[de62360d]357
[51587aa]358 case OT_CONSTANT:
359 // there are no intrinsic definitions of 0 or 1 as functions
360 assert( false );
361 }
362 } else {
363 nameExpr->accept( *this );
[6c4ff37]364 output << "(";
[51587aa]365 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
[6c4ff37]366 output << ")";
[51587aa]367 } // if
368 } else {
369 untypedExpr->get_function()->accept( *this );
[6c4ff37]370 output << "(";
[51587aa]371 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
[6c4ff37]372 output << ")";
[51587aa]373 } // if
374 }
[51b73452]375
[6c4ff37]376 void CodeGenerator::visit( NameExpr *nameExpr ) {
[51587aa]377 OperatorInfo opInfo;
378 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
379 assert( opInfo.type == OT_CONSTANT );
[6c4ff37]380 output << opInfo.symbol;
[51587aa]381 } else {
[6c4ff37]382 output << nameExpr->get_name();
[51587aa]383 } // if
384 }
[51b73452]385
[6c4ff37]386 void CodeGenerator::visit( AddressExpr *addressExpr ) {
387 output << "(&";
[51587aa]388 // this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address
389 if ( VariableExpr *variableExpr = dynamic_cast< VariableExpr* >( addressExpr->get_arg() ) ) {
[6c4ff37]390 output << mangleName( variableExpr->get_var() );
[51587aa]391 } else {
392 addressExpr->get_arg()->accept( *this );
393 } // if
[6c4ff37]394 output << ")";
[51587aa]395 }
396
[6c4ff37]397 void CodeGenerator::visit( CastExpr *castExpr ) {
[76b48f1]398 // if the cast is to an lvalue type, then the cast
399 // should be dropped, since the result of a cast is
400 // never an lvalue in C
401 if ( castExpr->get_results().front()->get_isLvalue() ) {
402 castExpr->get_arg()->accept( *this );
[51587aa]403 } else {
[76b48f1]404 output << "((";
405 if ( castExpr->get_results().empty() ) {
406 output << "void" ;
407 } else {
408 output << genType( castExpr->get_results().front(), "" );
409 } // if
410 output << ")";
411 castExpr->get_arg()->accept( *this );
412 output << ")";
413 }
[51587aa]414 }
[51b73452]415
[6c4ff37]416 void CodeGenerator::visit( UntypedMemberExpr *memberExpr ) {
[51587aa]417 assert( false );
418 }
[51b73452]419
[6c4ff37]420 void CodeGenerator::visit( MemberExpr *memberExpr ) {
[51587aa]421 memberExpr->get_aggregate()->accept( *this );
[6c4ff37]422 output << "." << mangleName( memberExpr->get_member() );
[51587aa]423 }
[51b73452]424
[6c4ff37]425 void CodeGenerator::visit( VariableExpr *variableExpr ) {
[51587aa]426 OperatorInfo opInfo;
427 if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) {
[6c4ff37]428 output << opInfo.symbol;
[51587aa]429 } else {
[6c4ff37]430 output << mangleName( variableExpr->get_var() );
[51587aa]431 } // if
432 }
[51b73452]433
[6c4ff37]434 void CodeGenerator::visit( ConstantExpr *constantExpr ) {
[51587aa]435 assert( constantExpr->get_constant() );
436 constantExpr->get_constant()->accept( *this );
437 }
[51b73452]438
[6c4ff37]439 void CodeGenerator::visit( SizeofExpr *sizeofExpr ) {
440 output << "sizeof(";
[51587aa]441 if ( sizeofExpr->get_isType() ) {
[6c4ff37]442 output << genType( sizeofExpr->get_type(), "" );
[51587aa]443 } else {
444 sizeofExpr->get_expr()->accept( *this );
445 } // if
[6c4ff37]446 output << ")";
[51587aa]447 }
[51b73452]448
[6c4ff37]449 void CodeGenerator::visit( LogicalExpr *logicalExpr ) {
450 output << "(";
[51587aa]451 logicalExpr->get_arg1()->accept( *this );
452 if ( logicalExpr->get_isAnd() ) {
[6c4ff37]453 output << " && ";
[51587aa]454 } else {
[6c4ff37]455 output << " || ";
[51587aa]456 } // if
457 logicalExpr->get_arg2()->accept( *this );
[6c4ff37]458 output << ")";
[51587aa]459 }
[51b73452]460
[6c4ff37]461 void CodeGenerator::visit( ConditionalExpr *conditionalExpr ) {
462 output << "(";
[51587aa]463 conditionalExpr->get_arg1()->accept( *this );
[6c4ff37]464 output << " ? ";
[51587aa]465 conditionalExpr->get_arg2()->accept( *this );
[6c4ff37]466 output << " : ";
[51587aa]467 conditionalExpr->get_arg3()->accept( *this );
[6c4ff37]468 output << ")";
[51587aa]469 }
[51b73452]470
[6c4ff37]471 void CodeGenerator::visit( CommaExpr *commaExpr ) {
472 output << "(";
[51587aa]473 commaExpr->get_arg1()->accept( *this );
[6c4ff37]474 output << " , ";
[51587aa]475 commaExpr->get_arg2()->accept( *this );
[6c4ff37]476 output << ")";
[51587aa]477 }
[51b73452]478
[6c4ff37]479 void CodeGenerator::visit( TupleExpr *tupleExpr ) {}
[51b73452]480
[6c4ff37]481 void CodeGenerator::visit( TypeExpr *typeExpr ) {}
[2b6c1e0]482
[7f5566b]483 void CodeGenerator::visit( AsmExpr *asmExpr ) {
484 if ( asmExpr->get_inout() ) {
485 output << "[ ";
486 asmExpr->get_inout()->accept( *this );
487 output << " ] ";
488 } // if
489 asmExpr->get_constraint()->accept( *this );
490 output << " ( ";
491 asmExpr->get_operand()->accept( *this );
492 output << " )";
493 }
494
[51587aa]495 //*** Statements
[6c4ff37]496 void CodeGenerator::visit( CompoundStmt *compoundStmt ) {
[51587aa]497 std::list<Statement*> ks = compoundStmt->get_kids();
[2b6c1e0]498 output << "{" << endl;
[51587aa]499
[2b6c1e0]500 cur_indent += CodeGenerator::tabsize;
[51587aa]501
[7f5566b]502 for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) {
[cda48b6]503 output << indent << printLabels( (*i)->get_labels() );
[7f5566b]504 (*i)->accept( *this );
[2b6c1e0]505
[6c4ff37]506 output << endl;
[2b6c1e0]507 if ( wantSpacing( *i ) ) {
508 output << endl;
509 }
[51587aa]510 }
[6c4ff37]511 cur_indent -= CodeGenerator::tabsize;
[51587aa]512
[cda48b6]513 output << indent << "}";
[51587aa]514 }
515
[6c4ff37]516 void CodeGenerator::visit( ExprStmt *exprStmt ) {
517 // I don't see why this check is necessary.
518 // If this starts to cause problems then put it back in,
519 // with an explanation
520 assert( exprStmt );
521
522 // if ( exprStmt != 0 ) {
523 exprStmt->get_expr()->accept( *this );
524 output << ";" ;
525 // } // if
[51587aa]526 }
527
[7f5566b]528 void CodeGenerator::visit( AsmStmt *asmStmt ) {
529 output << "asm ";
530 if ( asmStmt->get_voltile() ) output << "volatile ";
531 if ( ! asmStmt->get_gotolabels().empty() ) output << "goto ";
532 output << "( ";
533 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
534 output << " : ";
535 genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() );
536 output << " : ";
537 genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() );
538 output << " : ";
539 genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() );
540 if ( ! asmStmt->get_gotolabels().empty() ) {
541 output << " : ";
542 for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) {
543 output << *begin++;
544 if ( begin == asmStmt->get_gotolabels().end() ) break;
545 output << ", ";
546 } // for
547 } // if
548 output << " );" ;
549 }
550
[6c4ff37]551 void CodeGenerator::visit( IfStmt *ifStmt ) {
[7f5566b]552 output << "if ( ";
553 ifStmt->get_condition()->accept( *this );
554 output << " ) ";
[51587aa]555
[7f5566b]556 ifStmt->get_thenPart()->accept( *this );
[51587aa]557
558 if ( ifStmt->get_elsePart() != 0) {
[2b6c1e0]559 output << " else ";
[7f5566b]560 ifStmt->get_elsePart()->accept( *this );
[51587aa]561 } // if
562 }
563
[6c4ff37]564 void CodeGenerator::visit( SwitchStmt *switchStmt ) {
[7f5566b]565 output << "switch ( " ;
566 switchStmt->get_condition()->accept( *this );
567 output << " ) ";
[6c4ff37]568
[2b6c1e0]569 output << "{" << std::endl;
[6c4ff37]570 cur_indent += CodeGenerator::tabsize;
[51587aa]571
[6c4ff37]572 acceptAll( switchStmt->get_branches(), *this );
[51587aa]573
[6c4ff37]574 cur_indent -= CodeGenerator::tabsize;
[51587aa]575
[cda48b6]576 output << indent << "}";
[51587aa]577 }
578
[6c4ff37]579 void CodeGenerator::visit( CaseStmt *caseStmt ) {
[cda48b6]580 output << indent;
[eb3261f]581 if ( caseStmt->isDefault()) {
[2b6c1e0]582 output << "default";
[eb3261f]583 } else {
[2b6c1e0]584 output << "case ";
[7f5566b]585 caseStmt->get_condition()->accept( *this );
[17cd4eb]586 } // if
[6c4ff37]587 output << ":\n";
588
[51587aa]589 std::list<Statement *> sts = caseStmt->get_statements();
590
[6c4ff37]591 cur_indent += CodeGenerator::tabsize;
[51587aa]592 for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) {
[cda48b6]593 output << indent << printLabels( (*i)->get_labels() ) ;
[7f5566b]594 (*i)->accept( *this );
[6c4ff37]595 output << endl;
[51587aa]596 }
[6c4ff37]597 cur_indent -= CodeGenerator::tabsize;
[51587aa]598 }
599
[6c4ff37]600 void CodeGenerator::visit( BranchStmt *branchStmt ) {
[51587aa]601 switch ( branchStmt->get_type()) {
602 case BranchStmt::Goto:
603 if ( ! branchStmt->get_target().empty() )
[6c4ff37]604 output << "goto " << branchStmt->get_target();
[51587aa]605 else {
606 if ( branchStmt->get_computedTarget() != 0 ) {
[6c4ff37]607 output << "goto *";
[51587aa]608 branchStmt->get_computedTarget()->accept( *this );
609 } // if
610 } // if
611 break;
612 case BranchStmt::Break:
[6c4ff37]613 output << "break";
[51587aa]614 break;
615 case BranchStmt::Continue:
[6c4ff37]616 output << "continue";
[51587aa]617 break;
618 }
[2b6c1e0]619 output << ";";
[51587aa]620 }
621
622
[6c4ff37]623 void CodeGenerator::visit( ReturnStmt *returnStmt ) {
624 output << "return ";
[51587aa]625
626 // xxx -- check for null expression;
627 if ( returnStmt->get_expr() ) {
628 returnStmt->get_expr()->accept( *this );
629 } // if
[6c4ff37]630 output << ";";
[51587aa]631 }
632
[6c4ff37]633 void CodeGenerator::visit( WhileStmt *whileStmt ) {
[51587aa]634 if ( whileStmt->get_isDoWhile() )
[6c4ff37]635 output << "do" ;
[51587aa]636 else {
[6c4ff37]637 output << "while (" ;
[7f5566b]638 whileStmt->get_condition()->accept( *this );
[6c4ff37]639 output << ")";
[51587aa]640 } // if
[2b6c1e0]641 output << " ";
[51587aa]642
[2b6c1e0]643 output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() );
[51587aa]644 whileStmt->get_body()->accept( *this );
645
[cda48b6]646 output << indent;
[51587aa]647
648 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]649 output << " while (" ;
[7f5566b]650 whileStmt->get_condition()->accept( *this );
[6c4ff37]651 output << ");";
[51587aa]652 } // if
653 }
654
[6c4ff37]655 void CodeGenerator::visit( ForStmt *forStmt ) {
[145f1fc]656 // initialization is always hoisted, so don't
657 // bother doing anything with that
658 output << "for (;";
[51587aa]659
660 if ( forStmt->get_condition() != 0 )
661 forStmt->get_condition()->accept( *this );
[6c4ff37]662 output << ";";
[51587aa]663
664 if ( forStmt->get_increment() != 0 )
665 forStmt->get_increment()->accept( *this );
[2b6c1e0]666 output << ") ";
[51587aa]667
668 if ( forStmt->get_body() != 0 ) {
[2b6c1e0]669 output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() );
[51587aa]670 forStmt->get_body()->accept( *this );
671 } // if
672 }
673
[6c4ff37]674 void CodeGenerator::visit( NullStmt *nullStmt ) {
[cda48b6]675 //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() );
[6c4ff37]676 output << "/* null statement */ ;";
[51587aa]677 }
678
[6c4ff37]679 void CodeGenerator::visit( DeclStmt *declStmt ) {
[51587aa]680 declStmt->get_decl()->accept( *this );
681
682 if ( doSemicolon( declStmt->get_decl() ) ) {
[6c4ff37]683 output << ";";
[51587aa]684 } // if
685 }
686
[6c4ff37]687 std::string CodeGenerator::printLabels( std::list< Label > &l ) {
[51587aa]688 std::string str( "" );
[6c4ff37]689 l.unique(); // assumes a sorted list. Why not use set?
[51587aa]690
691 for ( std::list< Label >::iterator i = l.begin(); i != l.end(); i++ )
692 str += *i + ": ";
693
694 return str;
695 }
696
[6c4ff37]697 void CodeGenerator::handleStorageClass( Declaration *decl ) {
[51587aa]698 switch ( decl->get_storageClass() ) {
[68cd1ce]699 case DeclarationNode::Extern:
[6c4ff37]700 output << "extern ";
[51587aa]701 break;
[68cd1ce]702 case DeclarationNode::Static:
[6c4ff37]703 output << "static ";
[51587aa]704 break;
[68cd1ce]705 case DeclarationNode::Auto:
[51587aa]706 // silently drop storage class
707 break;
[68cd1ce]708 case DeclarationNode::Register:
[6c4ff37]709 output << "register ";
[51587aa]710 break;
[68cd1ce]711 case DeclarationNode::Inline:
[de62360d]712 output << "inline ";
[f38c8d9]713 break;
[68cd1ce]714 case DeclarationNode::Fortran:
715 output << "fortran ";
716 break;
717 case DeclarationNode::Noreturn:
718 output << "_Noreturn ";
719 break;
720 case DeclarationNode::Threadlocal:
721 output << "_Thread_local ";
722 break;
723 case DeclarationNode::NoStorageClass:
[f38c8d9]724 break;
[843054c2]725 } // switch
[51587aa]726 }
[51b73452]727} // namespace CodeGen
[51587aa]728
729// Local Variables: //
730// tab-width: 4 //
731// mode: c++ //
732// compile-command: "make install" //
733// End: //
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