source: src/CodeGen/CodeGenerator.cc@ 620cb95

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 620cb95 was a9a259c, checked in by Rob Schluntz <rschlunt@…>, 10 years ago

autogenerate union ctor/dtors, autogenerate struct copy ctor, temporarily allow explicit calls to autogenerated ctors, add copy ctor to type constraints
  • Property mode set to 100644
File size: 21.4 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//
[71f4e4f]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
[d63eeb0]12// Last Modified On : Tue Feb 09 13:24:40 2016
13// Update Count : 255
[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
[d3b7937]28#include "Common/utility.h"
29#include "Common/UnimplementedError.h"
[51b73452]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 ) );
[71f4e4f]100
[51587aa]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();
[71f4e4f]114
[51587aa]115 std::list< Declaration * > &memb = aggDecl->get_members();
116
117 if ( ! memb.empty() ) {
[94b4364]118 output << " {" << endl;
[51587aa]119
[71f4e4f]120 cur_indent += CodeGenerator::tabsize;
[51587aa]121 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) {
[71f4e4f]122 output << indent;
[7f5566b]123 (*i)->accept( *this );
[6c4ff37]124 output << ";" << endl;
[51587aa]125 }
126
[71f4e4f]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 }
[71f4e4f]142
[6c4ff37]143 void CodeGenerator::visit( EnumDecl *aggDecl ) {
144 output << "enum ";
[51587aa]145
146 if ( aggDecl->get_name() != "" )
[6c4ff37]147 output << aggDecl->get_name();
[71f4e4f]148
[51587aa]149 std::list< Declaration* > &memb = aggDecl->get_members();
150
151 if ( ! memb.empty() ) {
[cda48b6]152 output << " {" << endl;
[51587aa]153
[71f4e4f]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 );
[71f4e4f]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
[71f4e4f]166 cur_indent -= CodeGenerator::tabsize;
[51587aa]167
[cda48b6]168 output << indent << "}";
[51587aa]169 } // if
170 }
[71f4e4f]171
[6c4ff37]172 void CodeGenerator::visit( ContextDecl *aggregateDecl ) {}
[71f4e4f]173
[6c4ff37]174 void CodeGenerator::visit( TypedefDecl *typeDecl ) {
175 output << "typedef ";
176 output << genType( typeDecl->get_base(), typeDecl->get_name() );
[51587aa]177 }
[71f4e4f]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
[71f4e4f]218 void CodeGenerator::visit( Constant *constant ) {
[6c4ff37]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 ) ) {
[71f4e4f]235
[51587aa]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 }
[71f4e4f]244
[51587aa]245 default:
246 // do nothing
247 ;
248 }
[71f4e4f]249
[51587aa]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;
[71f4e4f]258
[51587aa]259 case OT_CALL:
[2794fff]260 // there are no intrinsic definitions of the function call operator or constructors or destructors
[51587aa]261 assert( false );
262 break;
[71f4e4f]263
[f1e012b]264 case OT_CTOR:
[a9a259c]265 // it's just an optimization to disallow this, so for now let it through
266 // since it makes autogenerating constructors a lot easier
267 varExpr->accept( *this );
268 output << "(";
269 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
270 output << ")";
271
[f1e012b]272 // intrinsic constructors should never be called directly - they should be transformed back into Initializer nodes
[a9a259c]273 // assert(false);
[f1e012b]274 break;
275
276 case OT_DTOR:
277 // intrinsic destructors do nothing - don't generate any code
278 output << " // " << dynamic_cast<VariableExpr*>(applicationExpr->get_function())->get_var()->get_name() << endl;
279 break;
280
[51587aa]281 case OT_PREFIX:
282 case OT_PREFIXASSIGN:
283 assert( applicationExpr->get_args().size() == 1 );
[6c4ff37]284 output << "(";
285 output << opInfo.symbol;
[51587aa]286 (*arg)->accept( *this );
[6c4ff37]287 output << ")";
[51587aa]288 break;
[71f4e4f]289
[51587aa]290 case OT_POSTFIX:
291 case OT_POSTFIXASSIGN:
292 assert( applicationExpr->get_args().size() == 1 );
293 (*arg)->accept( *this );
[6c4ff37]294 output << opInfo.symbol;
[51587aa]295 break;
296
[f1e012b]297
[51587aa]298 case OT_INFIX:
299 case OT_INFIXASSIGN:
300 assert( applicationExpr->get_args().size() == 2 );
[6c4ff37]301 output << "(";
[51587aa]302 (*arg++)->accept( *this );
[6c4ff37]303 output << opInfo.symbol;
[51587aa]304 (*arg)->accept( *this );
[6c4ff37]305 output << ")";
[51587aa]306 break;
[71f4e4f]307
[51587aa]308 case OT_CONSTANT:
[721f17a]309 case OT_LABELADDRESS:
310 // there are no intrinsic definitions of 0/1 or label addresses as functions
[51587aa]311 assert( false );
312 }
[17cd4eb]313 } else {
[51587aa]314 varExpr->accept( *this );
[6c4ff37]315 output << "(";
[51587aa]316 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]317 output << ")";
[17cd4eb]318 } // if
[51587aa]319 } else {
320 applicationExpr->get_function()->accept( *this );
[6c4ff37]321 output << "(";
[51587aa]322 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]323 output << ")";
[51587aa]324 } // if
325 }
[71f4e4f]326
[6c4ff37]327 void CodeGenerator::visit( UntypedExpr *untypedExpr ) {
[51587aa]328 if ( NameExpr *nameExpr = dynamic_cast< NameExpr* >( untypedExpr->get_function() ) ) {
329 OperatorInfo opInfo;
330 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
331 std::list< Expression* >::iterator arg = untypedExpr->get_args().begin();
332 switch ( opInfo.type ) {
333 case OT_INDEX:
334 assert( untypedExpr->get_args().size() == 2 );
335 (*arg++)->accept( *this );
[6c4ff37]336 output << "[";
[51587aa]337 (*arg)->accept( *this );
[6c4ff37]338 output << "]";
[51587aa]339 break;
[71f4e4f]340
[51587aa]341 case OT_CALL:
[f1e012b]342 assert( false );
343
[1840193]344 case OT_CTOR:
345 case OT_DTOR:
[f1e012b]346 // intrinsic constructors should never be called
347 // intrinsic destructors do nothing
[51587aa]348 break;
[71f4e4f]349
[51587aa]350 case OT_PREFIX:
351 case OT_PREFIXASSIGN:
[de62360d]352 case OT_LABELADDRESS:
[51587aa]353 assert( untypedExpr->get_args().size() == 1 );
[6c4ff37]354 output << "(";
355 output << opInfo.symbol;
[51587aa]356 (*arg)->accept( *this );
[6c4ff37]357 output << ")";
[51587aa]358 break;
[71f4e4f]359
[51587aa]360 case OT_POSTFIX:
361 case OT_POSTFIXASSIGN:
362 assert( untypedExpr->get_args().size() == 1 );
363 (*arg)->accept( *this );
[6c4ff37]364 output << opInfo.symbol;
[51587aa]365 break;
[71f4e4f]366
[51587aa]367 case OT_INFIX:
368 case OT_INFIXASSIGN:
369 assert( untypedExpr->get_args().size() == 2 );
[6c4ff37]370 output << "(";
[51587aa]371 (*arg++)->accept( *this );
[6c4ff37]372 output << opInfo.symbol;
[51587aa]373 (*arg)->accept( *this );
[6c4ff37]374 output << ")";
[51587aa]375 break;
[71f4e4f]376
[51587aa]377 case OT_CONSTANT:
378 // there are no intrinsic definitions of 0 or 1 as functions
379 assert( false );
380 }
381 } else {
382 nameExpr->accept( *this );
[6c4ff37]383 output << "(";
[51587aa]384 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
[6c4ff37]385 output << ")";
[51587aa]386 } // if
387 } else {
388 untypedExpr->get_function()->accept( *this );
[6c4ff37]389 output << "(";
[51587aa]390 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
[6c4ff37]391 output << ")";
[51587aa]392 } // if
393 }
[71f4e4f]394
[6c4ff37]395 void CodeGenerator::visit( NameExpr *nameExpr ) {
[51587aa]396 OperatorInfo opInfo;
397 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
398 assert( opInfo.type == OT_CONSTANT );
[6c4ff37]399 output << opInfo.symbol;
[51587aa]400 } else {
[6c4ff37]401 output << nameExpr->get_name();
[51587aa]402 } // if
403 }
[71f4e4f]404
[6c4ff37]405 void CodeGenerator::visit( AddressExpr *addressExpr ) {
406 output << "(&";
[51587aa]407 // this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address
408 if ( VariableExpr *variableExpr = dynamic_cast< VariableExpr* >( addressExpr->get_arg() ) ) {
[6c4ff37]409 output << mangleName( variableExpr->get_var() );
[51587aa]410 } else {
411 addressExpr->get_arg()->accept( *this );
412 } // if
[6c4ff37]413 output << ")";
[51587aa]414 }
415
[6c4ff37]416 void CodeGenerator::visit( CastExpr *castExpr ) {
[803deb1]417 output << "(";
418 if ( castExpr->get_results().empty() ) {
419 output << "(void)" ;
420 } else if ( ! castExpr->get_results().front()->get_isLvalue() ) {
421 // at least one result type of cast, but not an lvalue
422 output << "(";
423 output << genType( castExpr->get_results().front(), "" );
[71f4e4f]424 output << ")";
[803deb1]425 } else {
426 // otherwise, the cast is to an lvalue type, so the cast
427 // should be dropped, since the result of a cast is
428 // never an lvalue in C
[76b48f1]429 }
[803deb1]430 castExpr->get_arg()->accept( *this );
431 output << ")";
[51587aa]432 }
[71f4e4f]433
[6c4ff37]434 void CodeGenerator::visit( UntypedMemberExpr *memberExpr ) {
[51587aa]435 assert( false );
436 }
[71f4e4f]437
[6c4ff37]438 void CodeGenerator::visit( MemberExpr *memberExpr ) {
[51587aa]439 memberExpr->get_aggregate()->accept( *this );
[6c4ff37]440 output << "." << mangleName( memberExpr->get_member() );
[51587aa]441 }
[71f4e4f]442
[6c4ff37]443 void CodeGenerator::visit( VariableExpr *variableExpr ) {
[51587aa]444 OperatorInfo opInfo;
445 if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) {
[6c4ff37]446 output << opInfo.symbol;
[51587aa]447 } else {
[6c4ff37]448 output << mangleName( variableExpr->get_var() );
[51587aa]449 } // if
450 }
[71f4e4f]451
[6c4ff37]452 void CodeGenerator::visit( ConstantExpr *constantExpr ) {
[51587aa]453 assert( constantExpr->get_constant() );
454 constantExpr->get_constant()->accept( *this );
455 }
[71f4e4f]456
[6c4ff37]457 void CodeGenerator::visit( SizeofExpr *sizeofExpr ) {
458 output << "sizeof(";
[51587aa]459 if ( sizeofExpr->get_isType() ) {
[6c4ff37]460 output << genType( sizeofExpr->get_type(), "" );
[51587aa]461 } else {
462 sizeofExpr->get_expr()->accept( *this );
463 } // if
[6c4ff37]464 output << ")";
[51587aa]465 }
[47534159]466
[25a054f]467 void CodeGenerator::visit( AlignofExpr *alignofExpr ) {
[47534159]468 // use GCC extension to avoid bumping std to C11
469 output << "__alignof__(";
[25a054f]470 if ( alignofExpr->get_isType() ) {
471 output << genType( alignofExpr->get_type(), "" );
[47534159]472 } else {
[25a054f]473 alignofExpr->get_expr()->accept( *this );
[47534159]474 } // if
475 output << ")";
476 }
[71f4e4f]477
[2a4b088]478 void CodeGenerator::visit( UntypedOffsetofExpr *offsetofExpr ) {
479 assert( false );
480 }
481
[25a054f]482 void CodeGenerator::visit( OffsetofExpr *offsetofExpr ) {
483 // use GCC builtin
484 output << "__builtin_offsetof(";
485 output << genType( offsetofExpr->get_type(), "" );
[e551c69]486 output << ", " << mangleName( offsetofExpr->get_member() );
[25a054f]487 output << ")";
488 }
[d63eeb0]489
[6c4ff37]490 void CodeGenerator::visit( LogicalExpr *logicalExpr ) {
491 output << "(";
[51587aa]492 logicalExpr->get_arg1()->accept( *this );
493 if ( logicalExpr->get_isAnd() ) {
[6c4ff37]494 output << " && ";
[51587aa]495 } else {
[6c4ff37]496 output << " || ";
[51587aa]497 } // if
498 logicalExpr->get_arg2()->accept( *this );
[6c4ff37]499 output << ")";
[51587aa]500 }
[71f4e4f]501
[6c4ff37]502 void CodeGenerator::visit( ConditionalExpr *conditionalExpr ) {
503 output << "(";
[51587aa]504 conditionalExpr->get_arg1()->accept( *this );
[6c4ff37]505 output << " ? ";
[51587aa]506 conditionalExpr->get_arg2()->accept( *this );
[6c4ff37]507 output << " : ";
[51587aa]508 conditionalExpr->get_arg3()->accept( *this );
[6c4ff37]509 output << ")";
[51587aa]510 }
[71f4e4f]511
[6c4ff37]512 void CodeGenerator::visit( CommaExpr *commaExpr ) {
513 output << "(";
[51587aa]514 commaExpr->get_arg1()->accept( *this );
[6c4ff37]515 output << " , ";
[51587aa]516 commaExpr->get_arg2()->accept( *this );
[6c4ff37]517 output << ")";
[51587aa]518 }
[71f4e4f]519
[6c4ff37]520 void CodeGenerator::visit( TupleExpr *tupleExpr ) {}
[71f4e4f]521
[6c4ff37]522 void CodeGenerator::visit( TypeExpr *typeExpr ) {}
[2b6c1e0]523
[7f5566b]524 void CodeGenerator::visit( AsmExpr *asmExpr ) {
525 if ( asmExpr->get_inout() ) {
526 output << "[ ";
527 asmExpr->get_inout()->accept( *this );
528 output << " ] ";
529 } // if
530 asmExpr->get_constraint()->accept( *this );
531 output << " ( ";
532 asmExpr->get_operand()->accept( *this );
533 output << " )";
534 }
535
[51587aa]536 //*** Statements
[6c4ff37]537 void CodeGenerator::visit( CompoundStmt *compoundStmt ) {
[51587aa]538 std::list<Statement*> ks = compoundStmt->get_kids();
[2b6c1e0]539 output << "{" << endl;
[51587aa]540
[2b6c1e0]541 cur_indent += CodeGenerator::tabsize;
[51587aa]542
[7f5566b]543 for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) {
[cda48b6]544 output << indent << printLabels( (*i)->get_labels() );
[7f5566b]545 (*i)->accept( *this );
[2b6c1e0]546
[6c4ff37]547 output << endl;
[2b6c1e0]548 if ( wantSpacing( *i ) ) {
549 output << endl;
550 }
[51587aa]551 }
[71f4e4f]552 cur_indent -= CodeGenerator::tabsize;
[51587aa]553
[cda48b6]554 output << indent << "}";
[51587aa]555 }
556
[6c4ff37]557 void CodeGenerator::visit( ExprStmt *exprStmt ) {
[71f4e4f]558 // I don't see why this check is necessary.
559 // If this starts to cause problems then put it back in,
[6c4ff37]560 // with an explanation
561 assert( exprStmt );
562
563 // if ( exprStmt != 0 ) {
564 exprStmt->get_expr()->accept( *this );
565 output << ";" ;
566 // } // if
[51587aa]567 }
568
[7f5566b]569 void CodeGenerator::visit( AsmStmt *asmStmt ) {
570 output << "asm ";
571 if ( asmStmt->get_voltile() ) output << "volatile ";
572 if ( ! asmStmt->get_gotolabels().empty() ) output << "goto ";
573 output << "( ";
574 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
575 output << " : ";
576 genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() );
577 output << " : ";
578 genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() );
579 output << " : ";
580 genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() );
581 if ( ! asmStmt->get_gotolabels().empty() ) {
582 output << " : ";
583 for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) {
584 output << *begin++;
585 if ( begin == asmStmt->get_gotolabels().end() ) break;
586 output << ", ";
587 } // for
588 } // if
589 output << " );" ;
590 }
591
[6c4ff37]592 void CodeGenerator::visit( IfStmt *ifStmt ) {
[7f5566b]593 output << "if ( ";
594 ifStmt->get_condition()->accept( *this );
595 output << " ) ";
[51587aa]596
[7f5566b]597 ifStmt->get_thenPart()->accept( *this );
[51587aa]598
599 if ( ifStmt->get_elsePart() != 0) {
[2b6c1e0]600 output << " else ";
[7f5566b]601 ifStmt->get_elsePart()->accept( *this );
[51587aa]602 } // if
603 }
604
[6c4ff37]605 void CodeGenerator::visit( SwitchStmt *switchStmt ) {
[7f5566b]606 output << "switch ( " ;
607 switchStmt->get_condition()->accept( *this );
608 output << " ) ";
[71f4e4f]609
[2b6c1e0]610 output << "{" << std::endl;
[6c4ff37]611 cur_indent += CodeGenerator::tabsize;
[51587aa]612
[6c4ff37]613 acceptAll( switchStmt->get_branches(), *this );
[51587aa]614
[6c4ff37]615 cur_indent -= CodeGenerator::tabsize;
[51587aa]616
[cda48b6]617 output << indent << "}";
[51587aa]618 }
619
[6c4ff37]620 void CodeGenerator::visit( CaseStmt *caseStmt ) {
[cda48b6]621 output << indent;
[eb3261f]622 if ( caseStmt->isDefault()) {
[2b6c1e0]623 output << "default";
[eb3261f]624 } else {
[2b6c1e0]625 output << "case ";
[7f5566b]626 caseStmt->get_condition()->accept( *this );
[17cd4eb]627 } // if
[6c4ff37]628 output << ":\n";
[71f4e4f]629
[51587aa]630 std::list<Statement *> sts = caseStmt->get_statements();
631
[6c4ff37]632 cur_indent += CodeGenerator::tabsize;
[51587aa]633 for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) {
[cda48b6]634 output << indent << printLabels( (*i)->get_labels() ) ;
[7f5566b]635 (*i)->accept( *this );
[6c4ff37]636 output << endl;
[51587aa]637 }
[6c4ff37]638 cur_indent -= CodeGenerator::tabsize;
[51587aa]639 }
640
[6c4ff37]641 void CodeGenerator::visit( BranchStmt *branchStmt ) {
[51587aa]642 switch ( branchStmt->get_type()) {
643 case BranchStmt::Goto:
644 if ( ! branchStmt->get_target().empty() )
[6c4ff37]645 output << "goto " << branchStmt->get_target();
[71f4e4f]646 else {
[51587aa]647 if ( branchStmt->get_computedTarget() != 0 ) {
[6c4ff37]648 output << "goto *";
[51587aa]649 branchStmt->get_computedTarget()->accept( *this );
650 } // if
651 } // if
652 break;
653 case BranchStmt::Break:
[6c4ff37]654 output << "break";
[51587aa]655 break;
656 case BranchStmt::Continue:
[6c4ff37]657 output << "continue";
[51587aa]658 break;
659 }
[2b6c1e0]660 output << ";";
[51587aa]661 }
662
663
[6c4ff37]664 void CodeGenerator::visit( ReturnStmt *returnStmt ) {
665 output << "return ";
[51587aa]666
667 // xxx -- check for null expression;
668 if ( returnStmt->get_expr() ) {
669 returnStmt->get_expr()->accept( *this );
670 } // if
[6c4ff37]671 output << ";";
[51587aa]672 }
673
[6c4ff37]674 void CodeGenerator::visit( WhileStmt *whileStmt ) {
[51587aa]675 if ( whileStmt->get_isDoWhile() )
[6c4ff37]676 output << "do" ;
[51587aa]677 else {
[6c4ff37]678 output << "while (" ;
[7f5566b]679 whileStmt->get_condition()->accept( *this );
[6c4ff37]680 output << ")";
[51587aa]681 } // if
[2b6c1e0]682 output << " ";
[51587aa]683
[2b6c1e0]684 output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() );
[51587aa]685 whileStmt->get_body()->accept( *this );
686
[cda48b6]687 output << indent;
[51587aa]688
689 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]690 output << " while (" ;
[7f5566b]691 whileStmt->get_condition()->accept( *this );
[6c4ff37]692 output << ");";
[51587aa]693 } // if
694 }
695
[6c4ff37]696 void CodeGenerator::visit( ForStmt *forStmt ) {
[71f4e4f]697 // initialization is always hoisted, so don't
698 // bother doing anything with that
[145f1fc]699 output << "for (;";
[51587aa]700
701 if ( forStmt->get_condition() != 0 )
702 forStmt->get_condition()->accept( *this );
[6c4ff37]703 output << ";";
[51587aa]704
705 if ( forStmt->get_increment() != 0 )
706 forStmt->get_increment()->accept( *this );
[2b6c1e0]707 output << ") ";
[51587aa]708
709 if ( forStmt->get_body() != 0 ) {
[2b6c1e0]710 output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() );
[51587aa]711 forStmt->get_body()->accept( *this );
712 } // if
713 }
714
[6c4ff37]715 void CodeGenerator::visit( NullStmt *nullStmt ) {
[cda48b6]716 //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() );
[6c4ff37]717 output << "/* null statement */ ;";
[51587aa]718 }
719
[6c4ff37]720 void CodeGenerator::visit( DeclStmt *declStmt ) {
[51587aa]721 declStmt->get_decl()->accept( *this );
[71f4e4f]722
[51587aa]723 if ( doSemicolon( declStmt->get_decl() ) ) {
[6c4ff37]724 output << ";";
[51587aa]725 } // if
726 }
727
[6c4ff37]728 std::string CodeGenerator::printLabels( std::list< Label > &l ) {
[51587aa]729 std::string str( "" );
[6c4ff37]730 l.unique(); // assumes a sorted list. Why not use set?
[51587aa]731
732 for ( std::list< Label >::iterator i = l.begin(); i != l.end(); i++ )
733 str += *i + ": ";
734
735 return str;
736 }
737
[6c4ff37]738 void CodeGenerator::handleStorageClass( Declaration *decl ) {
[51587aa]739 switch ( decl->get_storageClass() ) {
[68cd1ce]740 case DeclarationNode::Extern:
[6c4ff37]741 output << "extern ";
[51587aa]742 break;
[68cd1ce]743 case DeclarationNode::Static:
[6c4ff37]744 output << "static ";
[51587aa]745 break;
[68cd1ce]746 case DeclarationNode::Auto:
[51587aa]747 // silently drop storage class
748 break;
[68cd1ce]749 case DeclarationNode::Register:
[6c4ff37]750 output << "register ";
[51587aa]751 break;
[68cd1ce]752 case DeclarationNode::Inline:
[de62360d]753 output << "inline ";
[f38c8d9]754 break;
[68cd1ce]755 case DeclarationNode::Fortran:
756 output << "fortran ";
757 break;
758 case DeclarationNode::Noreturn:
759 output << "_Noreturn ";
760 break;
761 case DeclarationNode::Threadlocal:
762 output << "_Thread_local ";
763 break;
764 case DeclarationNode::NoStorageClass:
[f38c8d9]765 break;
[843054c2]766 } // switch
[51587aa]767 }
[51b73452]768} // namespace CodeGen
[51587aa]769
770// Local Variables: //
771// tab-width: 4 //
772// mode: c++ //
773// compile-command: "make install" //
774// End: //
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