source: src/CodeGen/CodeGenerator.cc@ 6d160d7

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 6d160d7 was 421edab, checked in by Aaron Moss <a3moss@…>, 10 years ago

Merge changes from master
  • Property mode set to 100644
File size: 20.5 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
[803deb1]12// Last Modified On : Wed Jan 20 12:54:50 2016
13// Update Count : 241
[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 ) {
[803deb1]394 output << "(";
395 if ( castExpr->get_results().empty() ) {
396 output << "(void)" ;
397 } else if ( ! castExpr->get_results().front()->get_isLvalue() ) {
398 // at least one result type of cast, but not an lvalue
399 output << "(";
400 output << genType( castExpr->get_results().front(), "" );
[76b48f1]401 output << ")";
[803deb1]402 } else {
403 // otherwise, the cast is to an lvalue type, so the cast
404 // should be dropped, since the result of a cast is
405 // never an lvalue in C
[76b48f1]406 }
[803deb1]407 castExpr->get_arg()->accept( *this );
408 output << ")";
[51587aa]409 }
[51b73452]410
[6c4ff37]411 void CodeGenerator::visit( UntypedMemberExpr *memberExpr ) {
[51587aa]412 assert( false );
413 }
[51b73452]414
[6c4ff37]415 void CodeGenerator::visit( MemberExpr *memberExpr ) {
[51587aa]416 memberExpr->get_aggregate()->accept( *this );
[6c4ff37]417 output << "." << mangleName( memberExpr->get_member() );
[51587aa]418 }
[51b73452]419
[6c4ff37]420 void CodeGenerator::visit( VariableExpr *variableExpr ) {
[51587aa]421 OperatorInfo opInfo;
422 if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) {
[6c4ff37]423 output << opInfo.symbol;
[51587aa]424 } else {
[6c4ff37]425 output << mangleName( variableExpr->get_var() );
[51587aa]426 } // if
427 }
[51b73452]428
[6c4ff37]429 void CodeGenerator::visit( ConstantExpr *constantExpr ) {
[51587aa]430 assert( constantExpr->get_constant() );
431 constantExpr->get_constant()->accept( *this );
432 }
[51b73452]433
[6c4ff37]434 void CodeGenerator::visit( SizeofExpr *sizeofExpr ) {
435 output << "sizeof(";
[51587aa]436 if ( sizeofExpr->get_isType() ) {
[6c4ff37]437 output << genType( sizeofExpr->get_type(), "" );
[51587aa]438 } else {
439 sizeofExpr->get_expr()->accept( *this );
440 } // if
[6c4ff37]441 output << ")";
[51587aa]442 }
[47534159]443
[25a054f]444 void CodeGenerator::visit( AlignofExpr *alignofExpr ) {
[47534159]445 // use GCC extension to avoid bumping std to C11
446 output << "__alignof__(";
[25a054f]447 if ( alignofExpr->get_isType() ) {
448 output << genType( alignofExpr->get_type(), "" );
[47534159]449 } else {
[25a054f]450 alignofExpr->get_expr()->accept( *this );
[47534159]451 } // if
452 output << ")";
453 }
[25a054f]454
455 void CodeGenerator::visit( OffsetofExpr *offsetofExpr ) {
456 // use GCC builtin
457 output << "__builtin_offsetof(";
458 output << genType( offsetofExpr->get_type(), "" );
[e551c69]459 output << ", " << mangleName( offsetofExpr->get_member() );
[25a054f]460 output << ")";
461 }
[51b73452]462
[6c4ff37]463 void CodeGenerator::visit( LogicalExpr *logicalExpr ) {
464 output << "(";
[51587aa]465 logicalExpr->get_arg1()->accept( *this );
466 if ( logicalExpr->get_isAnd() ) {
[6c4ff37]467 output << " && ";
[51587aa]468 } else {
[6c4ff37]469 output << " || ";
[51587aa]470 } // if
471 logicalExpr->get_arg2()->accept( *this );
[6c4ff37]472 output << ")";
[51587aa]473 }
[51b73452]474
[6c4ff37]475 void CodeGenerator::visit( ConditionalExpr *conditionalExpr ) {
476 output << "(";
[51587aa]477 conditionalExpr->get_arg1()->accept( *this );
[6c4ff37]478 output << " ? ";
[51587aa]479 conditionalExpr->get_arg2()->accept( *this );
[6c4ff37]480 output << " : ";
[51587aa]481 conditionalExpr->get_arg3()->accept( *this );
[6c4ff37]482 output << ")";
[51587aa]483 }
[51b73452]484
[6c4ff37]485 void CodeGenerator::visit( CommaExpr *commaExpr ) {
486 output << "(";
[51587aa]487 commaExpr->get_arg1()->accept( *this );
[6c4ff37]488 output << " , ";
[51587aa]489 commaExpr->get_arg2()->accept( *this );
[6c4ff37]490 output << ")";
[51587aa]491 }
[51b73452]492
[6c4ff37]493 void CodeGenerator::visit( TupleExpr *tupleExpr ) {}
[51b73452]494
[6c4ff37]495 void CodeGenerator::visit( TypeExpr *typeExpr ) {}
[2b6c1e0]496
[7f5566b]497 void CodeGenerator::visit( AsmExpr *asmExpr ) {
498 if ( asmExpr->get_inout() ) {
499 output << "[ ";
500 asmExpr->get_inout()->accept( *this );
501 output << " ] ";
502 } // if
503 asmExpr->get_constraint()->accept( *this );
504 output << " ( ";
505 asmExpr->get_operand()->accept( *this );
506 output << " )";
507 }
508
[51587aa]509 //*** Statements
[6c4ff37]510 void CodeGenerator::visit( CompoundStmt *compoundStmt ) {
[51587aa]511 std::list<Statement*> ks = compoundStmt->get_kids();
[2b6c1e0]512 output << "{" << endl;
[51587aa]513
[2b6c1e0]514 cur_indent += CodeGenerator::tabsize;
[51587aa]515
[7f5566b]516 for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) {
[cda48b6]517 output << indent << printLabels( (*i)->get_labels() );
[7f5566b]518 (*i)->accept( *this );
[2b6c1e0]519
[6c4ff37]520 output << endl;
[2b6c1e0]521 if ( wantSpacing( *i ) ) {
522 output << endl;
523 }
[51587aa]524 }
[6c4ff37]525 cur_indent -= CodeGenerator::tabsize;
[51587aa]526
[cda48b6]527 output << indent << "}";
[51587aa]528 }
529
[6c4ff37]530 void CodeGenerator::visit( ExprStmt *exprStmt ) {
531 // I don't see why this check is necessary.
532 // If this starts to cause problems then put it back in,
533 // with an explanation
534 assert( exprStmt );
535
536 // if ( exprStmt != 0 ) {
537 exprStmt->get_expr()->accept( *this );
538 output << ";" ;
539 // } // if
[51587aa]540 }
541
[7f5566b]542 void CodeGenerator::visit( AsmStmt *asmStmt ) {
543 output << "asm ";
544 if ( asmStmt->get_voltile() ) output << "volatile ";
545 if ( ! asmStmt->get_gotolabels().empty() ) output << "goto ";
546 output << "( ";
547 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
548 output << " : ";
549 genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() );
550 output << " : ";
551 genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() );
552 output << " : ";
553 genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() );
554 if ( ! asmStmt->get_gotolabels().empty() ) {
555 output << " : ";
556 for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) {
557 output << *begin++;
558 if ( begin == asmStmt->get_gotolabels().end() ) break;
559 output << ", ";
560 } // for
561 } // if
562 output << " );" ;
563 }
564
[6c4ff37]565 void CodeGenerator::visit( IfStmt *ifStmt ) {
[7f5566b]566 output << "if ( ";
567 ifStmt->get_condition()->accept( *this );
568 output << " ) ";
[51587aa]569
[7f5566b]570 ifStmt->get_thenPart()->accept( *this );
[51587aa]571
572 if ( ifStmt->get_elsePart() != 0) {
[2b6c1e0]573 output << " else ";
[7f5566b]574 ifStmt->get_elsePart()->accept( *this );
[51587aa]575 } // if
576 }
577
[6c4ff37]578 void CodeGenerator::visit( SwitchStmt *switchStmt ) {
[7f5566b]579 output << "switch ( " ;
580 switchStmt->get_condition()->accept( *this );
581 output << " ) ";
[6c4ff37]582
[2b6c1e0]583 output << "{" << std::endl;
[6c4ff37]584 cur_indent += CodeGenerator::tabsize;
[51587aa]585
[6c4ff37]586 acceptAll( switchStmt->get_branches(), *this );
[51587aa]587
[6c4ff37]588 cur_indent -= CodeGenerator::tabsize;
[51587aa]589
[cda48b6]590 output << indent << "}";
[51587aa]591 }
592
[6c4ff37]593 void CodeGenerator::visit( CaseStmt *caseStmt ) {
[cda48b6]594 output << indent;
[eb3261f]595 if ( caseStmt->isDefault()) {
[2b6c1e0]596 output << "default";
[eb3261f]597 } else {
[2b6c1e0]598 output << "case ";
[7f5566b]599 caseStmt->get_condition()->accept( *this );
[17cd4eb]600 } // if
[6c4ff37]601 output << ":\n";
602
[51587aa]603 std::list<Statement *> sts = caseStmt->get_statements();
604
[6c4ff37]605 cur_indent += CodeGenerator::tabsize;
[51587aa]606 for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) {
[cda48b6]607 output << indent << printLabels( (*i)->get_labels() ) ;
[7f5566b]608 (*i)->accept( *this );
[6c4ff37]609 output << endl;
[51587aa]610 }
[6c4ff37]611 cur_indent -= CodeGenerator::tabsize;
[51587aa]612 }
613
[6c4ff37]614 void CodeGenerator::visit( BranchStmt *branchStmt ) {
[51587aa]615 switch ( branchStmt->get_type()) {
616 case BranchStmt::Goto:
617 if ( ! branchStmt->get_target().empty() )
[6c4ff37]618 output << "goto " << branchStmt->get_target();
[51587aa]619 else {
620 if ( branchStmt->get_computedTarget() != 0 ) {
[6c4ff37]621 output << "goto *";
[51587aa]622 branchStmt->get_computedTarget()->accept( *this );
623 } // if
624 } // if
625 break;
626 case BranchStmt::Break:
[6c4ff37]627 output << "break";
[51587aa]628 break;
629 case BranchStmt::Continue:
[6c4ff37]630 output << "continue";
[51587aa]631 break;
632 }
[2b6c1e0]633 output << ";";
[51587aa]634 }
635
636
[6c4ff37]637 void CodeGenerator::visit( ReturnStmt *returnStmt ) {
638 output << "return ";
[51587aa]639
640 // xxx -- check for null expression;
641 if ( returnStmt->get_expr() ) {
642 returnStmt->get_expr()->accept( *this );
643 } // if
[6c4ff37]644 output << ";";
[51587aa]645 }
646
[6c4ff37]647 void CodeGenerator::visit( WhileStmt *whileStmt ) {
[51587aa]648 if ( whileStmt->get_isDoWhile() )
[6c4ff37]649 output << "do" ;
[51587aa]650 else {
[6c4ff37]651 output << "while (" ;
[7f5566b]652 whileStmt->get_condition()->accept( *this );
[6c4ff37]653 output << ")";
[51587aa]654 } // if
[2b6c1e0]655 output << " ";
[51587aa]656
[2b6c1e0]657 output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() );
[51587aa]658 whileStmt->get_body()->accept( *this );
659
[cda48b6]660 output << indent;
[51587aa]661
662 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]663 output << " while (" ;
[7f5566b]664 whileStmt->get_condition()->accept( *this );
[6c4ff37]665 output << ");";
[51587aa]666 } // if
667 }
668
[6c4ff37]669 void CodeGenerator::visit( ForStmt *forStmt ) {
[145f1fc]670 // initialization is always hoisted, so don't
671 // bother doing anything with that
672 output << "for (;";
[51587aa]673
674 if ( forStmt->get_condition() != 0 )
675 forStmt->get_condition()->accept( *this );
[6c4ff37]676 output << ";";
[51587aa]677
678 if ( forStmt->get_increment() != 0 )
679 forStmt->get_increment()->accept( *this );
[2b6c1e0]680 output << ") ";
[51587aa]681
682 if ( forStmt->get_body() != 0 ) {
[2b6c1e0]683 output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() );
[51587aa]684 forStmt->get_body()->accept( *this );
685 } // if
686 }
687
[6c4ff37]688 void CodeGenerator::visit( NullStmt *nullStmt ) {
[cda48b6]689 //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() );
[6c4ff37]690 output << "/* null statement */ ;";
[51587aa]691 }
692
[6c4ff37]693 void CodeGenerator::visit( DeclStmt *declStmt ) {
[51587aa]694 declStmt->get_decl()->accept( *this );
695
696 if ( doSemicolon( declStmt->get_decl() ) ) {
[6c4ff37]697 output << ";";
[51587aa]698 } // if
699 }
700
[6c4ff37]701 std::string CodeGenerator::printLabels( std::list< Label > &l ) {
[51587aa]702 std::string str( "" );
[6c4ff37]703 l.unique(); // assumes a sorted list. Why not use set?
[51587aa]704
705 for ( std::list< Label >::iterator i = l.begin(); i != l.end(); i++ )
706 str += *i + ": ";
707
708 return str;
709 }
710
[6c4ff37]711 void CodeGenerator::handleStorageClass( Declaration *decl ) {
[51587aa]712 switch ( decl->get_storageClass() ) {
[68cd1ce]713 case DeclarationNode::Extern:
[6c4ff37]714 output << "extern ";
[51587aa]715 break;
[68cd1ce]716 case DeclarationNode::Static:
[6c4ff37]717 output << "static ";
[51587aa]718 break;
[68cd1ce]719 case DeclarationNode::Auto:
[51587aa]720 // silently drop storage class
721 break;
[68cd1ce]722 case DeclarationNode::Register:
[6c4ff37]723 output << "register ";
[51587aa]724 break;
[68cd1ce]725 case DeclarationNode::Inline:
[de62360d]726 output << "inline ";
[f38c8d9]727 break;
[68cd1ce]728 case DeclarationNode::Fortran:
729 output << "fortran ";
730 break;
731 case DeclarationNode::Noreturn:
732 output << "_Noreturn ";
733 break;
734 case DeclarationNode::Threadlocal:
735 output << "_Thread_local ";
736 break;
737 case DeclarationNode::NoStorageClass:
[f38c8d9]738 break;
[843054c2]739 } // switch
[51587aa]740 }
[51b73452]741} // namespace CodeGen
[51587aa]742
743// Local Variables: //
744// tab-width: 4 //
745// mode: c++ //
746// compile-command: "make install" //
747// End: //
Note: See TracBrowser for help on using the repository browser.