source: src/CodeGen/CodeGenerator.cc@ 77acda06

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 77acda06 was 083cf31, checked in by Rob Schluntz <rschlunt@…>, 10 years ago

merge with master
  • Property mode set to 100644
File size: 20.4 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 }
[47534159]448
449 void CodeGenerator::visit( AlignofExpr *sizeofExpr ) {
450 // use GCC extension to avoid bumping std to C11
451 output << "__alignof__(";
452 if ( sizeofExpr->get_isType() ) {
453 output << genType( sizeofExpr->get_type(), "" );
454 } else {
455 sizeofExpr->get_expr()->accept( *this );
456 } // if
457 output << ")";
458 }
[51b73452]459
[6c4ff37]460 void CodeGenerator::visit( LogicalExpr *logicalExpr ) {
461 output << "(";
[51587aa]462 logicalExpr->get_arg1()->accept( *this );
463 if ( logicalExpr->get_isAnd() ) {
[6c4ff37]464 output << " && ";
[51587aa]465 } else {
[6c4ff37]466 output << " || ";
[51587aa]467 } // if
468 logicalExpr->get_arg2()->accept( *this );
[6c4ff37]469 output << ")";
[51587aa]470 }
[51b73452]471
[6c4ff37]472 void CodeGenerator::visit( ConditionalExpr *conditionalExpr ) {
473 output << "(";
[51587aa]474 conditionalExpr->get_arg1()->accept( *this );
[6c4ff37]475 output << " ? ";
[51587aa]476 conditionalExpr->get_arg2()->accept( *this );
[6c4ff37]477 output << " : ";
[51587aa]478 conditionalExpr->get_arg3()->accept( *this );
[6c4ff37]479 output << ")";
[51587aa]480 }
[51b73452]481
[6c4ff37]482 void CodeGenerator::visit( CommaExpr *commaExpr ) {
483 output << "(";
[51587aa]484 commaExpr->get_arg1()->accept( *this );
[6c4ff37]485 output << " , ";
[51587aa]486 commaExpr->get_arg2()->accept( *this );
[6c4ff37]487 output << ")";
[51587aa]488 }
[51b73452]489
[6c4ff37]490 void CodeGenerator::visit( TupleExpr *tupleExpr ) {}
[51b73452]491
[6c4ff37]492 void CodeGenerator::visit( TypeExpr *typeExpr ) {}
[2b6c1e0]493
[7f5566b]494 void CodeGenerator::visit( AsmExpr *asmExpr ) {
495 if ( asmExpr->get_inout() ) {
496 output << "[ ";
497 asmExpr->get_inout()->accept( *this );
498 output << " ] ";
499 } // if
500 asmExpr->get_constraint()->accept( *this );
501 output << " ( ";
502 asmExpr->get_operand()->accept( *this );
503 output << " )";
504 }
505
[51587aa]506 //*** Statements
[6c4ff37]507 void CodeGenerator::visit( CompoundStmt *compoundStmt ) {
[51587aa]508 std::list<Statement*> ks = compoundStmt->get_kids();
[2b6c1e0]509 output << "{" << endl;
[51587aa]510
[2b6c1e0]511 cur_indent += CodeGenerator::tabsize;
[51587aa]512
[7f5566b]513 for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) {
[cda48b6]514 output << indent << printLabels( (*i)->get_labels() );
[7f5566b]515 (*i)->accept( *this );
[2b6c1e0]516
[6c4ff37]517 output << endl;
[2b6c1e0]518 if ( wantSpacing( *i ) ) {
519 output << endl;
520 }
[51587aa]521 }
[6c4ff37]522 cur_indent -= CodeGenerator::tabsize;
[51587aa]523
[cda48b6]524 output << indent << "}";
[51587aa]525 }
526
[6c4ff37]527 void CodeGenerator::visit( ExprStmt *exprStmt ) {
528 // I don't see why this check is necessary.
529 // If this starts to cause problems then put it back in,
530 // with an explanation
531 assert( exprStmt );
532
533 // if ( exprStmt != 0 ) {
534 exprStmt->get_expr()->accept( *this );
535 output << ";" ;
536 // } // if
[51587aa]537 }
538
[7f5566b]539 void CodeGenerator::visit( AsmStmt *asmStmt ) {
540 output << "asm ";
541 if ( asmStmt->get_voltile() ) output << "volatile ";
542 if ( ! asmStmt->get_gotolabels().empty() ) output << "goto ";
543 output << "( ";
544 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
545 output << " : ";
546 genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() );
547 output << " : ";
548 genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() );
549 output << " : ";
550 genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() );
551 if ( ! asmStmt->get_gotolabels().empty() ) {
552 output << " : ";
553 for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) {
554 output << *begin++;
555 if ( begin == asmStmt->get_gotolabels().end() ) break;
556 output << ", ";
557 } // for
558 } // if
559 output << " );" ;
560 }
561
[6c4ff37]562 void CodeGenerator::visit( IfStmt *ifStmt ) {
[7f5566b]563 output << "if ( ";
564 ifStmt->get_condition()->accept( *this );
565 output << " ) ";
[51587aa]566
[7f5566b]567 ifStmt->get_thenPart()->accept( *this );
[51587aa]568
569 if ( ifStmt->get_elsePart() != 0) {
[2b6c1e0]570 output << " else ";
[7f5566b]571 ifStmt->get_elsePart()->accept( *this );
[51587aa]572 } // if
573 }
574
[6c4ff37]575 void CodeGenerator::visit( SwitchStmt *switchStmt ) {
[7f5566b]576 output << "switch ( " ;
577 switchStmt->get_condition()->accept( *this );
578 output << " ) ";
[6c4ff37]579
[2b6c1e0]580 output << "{" << std::endl;
[6c4ff37]581 cur_indent += CodeGenerator::tabsize;
[51587aa]582
[6c4ff37]583 acceptAll( switchStmt->get_branches(), *this );
[51587aa]584
[6c4ff37]585 cur_indent -= CodeGenerator::tabsize;
[51587aa]586
[cda48b6]587 output << indent << "}";
[51587aa]588 }
589
[6c4ff37]590 void CodeGenerator::visit( CaseStmt *caseStmt ) {
[cda48b6]591 output << indent;
[eb3261f]592 if ( caseStmt->isDefault()) {
[2b6c1e0]593 output << "default";
[eb3261f]594 } else {
[2b6c1e0]595 output << "case ";
[7f5566b]596 caseStmt->get_condition()->accept( *this );
[17cd4eb]597 } // if
[6c4ff37]598 output << ":\n";
599
[51587aa]600 std::list<Statement *> sts = caseStmt->get_statements();
601
[6c4ff37]602 cur_indent += CodeGenerator::tabsize;
[51587aa]603 for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) {
[cda48b6]604 output << indent << printLabels( (*i)->get_labels() ) ;
[7f5566b]605 (*i)->accept( *this );
[6c4ff37]606 output << endl;
[51587aa]607 }
[6c4ff37]608 cur_indent -= CodeGenerator::tabsize;
[51587aa]609 }
610
[6c4ff37]611 void CodeGenerator::visit( BranchStmt *branchStmt ) {
[51587aa]612 switch ( branchStmt->get_type()) {
613 case BranchStmt::Goto:
614 if ( ! branchStmt->get_target().empty() )
[6c4ff37]615 output << "goto " << branchStmt->get_target();
[51587aa]616 else {
617 if ( branchStmt->get_computedTarget() != 0 ) {
[6c4ff37]618 output << "goto *";
[51587aa]619 branchStmt->get_computedTarget()->accept( *this );
620 } // if
621 } // if
622 break;
623 case BranchStmt::Break:
[6c4ff37]624 output << "break";
[51587aa]625 break;
626 case BranchStmt::Continue:
[6c4ff37]627 output << "continue";
[51587aa]628 break;
629 }
[2b6c1e0]630 output << ";";
[51587aa]631 }
632
633
[6c4ff37]634 void CodeGenerator::visit( ReturnStmt *returnStmt ) {
635 output << "return ";
[51587aa]636
637 // xxx -- check for null expression;
638 if ( returnStmt->get_expr() ) {
639 returnStmt->get_expr()->accept( *this );
640 } // if
[6c4ff37]641 output << ";";
[51587aa]642 }
643
[6c4ff37]644 void CodeGenerator::visit( WhileStmt *whileStmt ) {
[51587aa]645 if ( whileStmt->get_isDoWhile() )
[6c4ff37]646 output << "do" ;
[51587aa]647 else {
[6c4ff37]648 output << "while (" ;
[7f5566b]649 whileStmt->get_condition()->accept( *this );
[6c4ff37]650 output << ")";
[51587aa]651 } // if
[2b6c1e0]652 output << " ";
[51587aa]653
[2b6c1e0]654 output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() );
[51587aa]655 whileStmt->get_body()->accept( *this );
656
[cda48b6]657 output << indent;
[51587aa]658
659 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]660 output << " while (" ;
[7f5566b]661 whileStmt->get_condition()->accept( *this );
[6c4ff37]662 output << ");";
[51587aa]663 } // if
664 }
665
[6c4ff37]666 void CodeGenerator::visit( ForStmt *forStmt ) {
[145f1fc]667 // initialization is always hoisted, so don't
668 // bother doing anything with that
669 output << "for (;";
[51587aa]670
671 if ( forStmt->get_condition() != 0 )
672 forStmt->get_condition()->accept( *this );
[6c4ff37]673 output << ";";
[51587aa]674
675 if ( forStmt->get_increment() != 0 )
676 forStmt->get_increment()->accept( *this );
[2b6c1e0]677 output << ") ";
[51587aa]678
679 if ( forStmt->get_body() != 0 ) {
[2b6c1e0]680 output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() );
[51587aa]681 forStmt->get_body()->accept( *this );
682 } // if
683 }
684
[6c4ff37]685 void CodeGenerator::visit( NullStmt *nullStmt ) {
[cda48b6]686 //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() );
[6c4ff37]687 output << "/* null statement */ ;";
[51587aa]688 }
689
[6c4ff37]690 void CodeGenerator::visit( DeclStmt *declStmt ) {
[51587aa]691 declStmt->get_decl()->accept( *this );
692
693 if ( doSemicolon( declStmt->get_decl() ) ) {
[6c4ff37]694 output << ";";
[51587aa]695 } // if
696 }
697
[6c4ff37]698 std::string CodeGenerator::printLabels( std::list< Label > &l ) {
[51587aa]699 std::string str( "" );
[6c4ff37]700 l.unique(); // assumes a sorted list. Why not use set?
[51587aa]701
702 for ( std::list< Label >::iterator i = l.begin(); i != l.end(); i++ )
703 str += *i + ": ";
704
705 return str;
706 }
707
[6c4ff37]708 void CodeGenerator::handleStorageClass( Declaration *decl ) {
[51587aa]709 switch ( decl->get_storageClass() ) {
[68cd1ce]710 case DeclarationNode::Extern:
[6c4ff37]711 output << "extern ";
[51587aa]712 break;
[68cd1ce]713 case DeclarationNode::Static:
[6c4ff37]714 output << "static ";
[51587aa]715 break;
[68cd1ce]716 case DeclarationNode::Auto:
[51587aa]717 // silently drop storage class
718 break;
[68cd1ce]719 case DeclarationNode::Register:
[6c4ff37]720 output << "register ";
[51587aa]721 break;
[68cd1ce]722 case DeclarationNode::Inline:
[de62360d]723 output << "inline ";
[f38c8d9]724 break;
[68cd1ce]725 case DeclarationNode::Fortran:
726 output << "fortran ";
727 break;
728 case DeclarationNode::Noreturn:
729 output << "_Noreturn ";
730 break;
731 case DeclarationNode::Threadlocal:
732 output << "_Thread_local ";
733 break;
734 case DeclarationNode::NoStorageClass:
[f38c8d9]735 break;
[843054c2]736 } // switch
[51587aa]737 }
[51b73452]738} // namespace CodeGen
[51587aa]739
740// Local Variables: //
741// tab-width: 4 //
742// mode: c++ //
743// compile-command: "make install" //
744// End: //
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