source: src/CodeGen/CodeGenerator.cc@ f5ef08c

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 f5ef08c was 5b40f30, checked in by Rob Schluntz <rschlunt@…>, 10 years ago

generate correct empty list initializer, ensure function return value is not incorrectly destructed before it is returned, do not add src parameter to autogenerated routines when they take a single argument
  • Property mode set to 100644
File size: 21.5 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//
[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 << "{ ";
[5b40f30]214 if ( init->begin_initializers() == init->end_initializers() ) {
215 // illegal to leave initializer list empty for scalar initializers,
216 // but always legal to have 0
217 output << "0";
218 } else {
219 genCommaList( init->begin_initializers(), init->end_initializers() );
220 }
[6c4ff37]221 output << " }";
[51587aa]222 }
223
[71f4e4f]224 void CodeGenerator::visit( Constant *constant ) {
[6c4ff37]225 output << constant->get_value() ;
[51587aa]226 }
227
228 //*** Expressions
[6c4ff37]229 void CodeGenerator::visit( ApplicationExpr *applicationExpr ) {
[51587aa]230 if ( VariableExpr *varExpr = dynamic_cast< VariableExpr* >( applicationExpr->get_function() ) ) {
231 OperatorInfo opInfo;
232 if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( varExpr->get_var()->get_name(), opInfo ) ) {
233 std::list< Expression* >::iterator arg = applicationExpr->get_args().begin();
234 switch ( opInfo.type ) {
235 case OT_PREFIXASSIGN:
236 case OT_POSTFIXASSIGN:
237 case OT_INFIXASSIGN:
238 {
239 assert( arg != applicationExpr->get_args().end() );
240 if ( AddressExpr *addrExpr = dynamic_cast< AddressExpr * >( *arg ) ) {
[71f4e4f]241
[51587aa]242 *arg = addrExpr->get_arg();
243 } else {
244 UntypedExpr *newExpr = new UntypedExpr( new NameExpr( "*?" ) );
245 newExpr->get_args().push_back( *arg );
246 *arg = newExpr;
247 } // if
248 break;
249 }
[71f4e4f]250
[51587aa]251 default:
252 // do nothing
253 ;
254 }
[71f4e4f]255
[51587aa]256 switch ( opInfo.type ) {
257 case OT_INDEX:
258 assert( applicationExpr->get_args().size() == 2 );
259 (*arg++)->accept( *this );
[6c4ff37]260 output << "[";
[51587aa]261 (*arg)->accept( *this );
[6c4ff37]262 output << "]";
[51587aa]263 break;
[71f4e4f]264
[51587aa]265 case OT_CALL:
[2794fff]266 // there are no intrinsic definitions of the function call operator or constructors or destructors
[51587aa]267 assert( false );
268 break;
[71f4e4f]269
[f1e012b]270 case OT_CTOR:
[a9a259c]271 // it's just an optimization to disallow this, so for now let it through
272 // since it makes autogenerating constructors a lot easier
273 varExpr->accept( *this );
274 output << "(";
275 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
276 output << ")";
277
[f1e012b]278 // intrinsic constructors should never be called directly - they should be transformed back into Initializer nodes
[a9a259c]279 // assert(false);
[f1e012b]280 break;
281
282 case OT_DTOR:
283 // intrinsic destructors do nothing - don't generate any code
284 output << " // " << dynamic_cast<VariableExpr*>(applicationExpr->get_function())->get_var()->get_name() << endl;
285 break;
286
[51587aa]287 case OT_PREFIX:
288 case OT_PREFIXASSIGN:
289 assert( applicationExpr->get_args().size() == 1 );
[6c4ff37]290 output << "(";
291 output << opInfo.symbol;
[51587aa]292 (*arg)->accept( *this );
[6c4ff37]293 output << ")";
[51587aa]294 break;
[71f4e4f]295
[51587aa]296 case OT_POSTFIX:
297 case OT_POSTFIXASSIGN:
298 assert( applicationExpr->get_args().size() == 1 );
299 (*arg)->accept( *this );
[6c4ff37]300 output << opInfo.symbol;
[51587aa]301 break;
302
[f1e012b]303
[51587aa]304 case OT_INFIX:
305 case OT_INFIXASSIGN:
306 assert( applicationExpr->get_args().size() == 2 );
[6c4ff37]307 output << "(";
[51587aa]308 (*arg++)->accept( *this );
[6c4ff37]309 output << opInfo.symbol;
[51587aa]310 (*arg)->accept( *this );
[6c4ff37]311 output << ")";
[51587aa]312 break;
[71f4e4f]313
[51587aa]314 case OT_CONSTANT:
[721f17a]315 case OT_LABELADDRESS:
316 // there are no intrinsic definitions of 0/1 or label addresses as functions
[51587aa]317 assert( false );
318 }
[17cd4eb]319 } else {
[51587aa]320 varExpr->accept( *this );
[6c4ff37]321 output << "(";
[51587aa]322 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]323 output << ")";
[17cd4eb]324 } // if
[51587aa]325 } else {
326 applicationExpr->get_function()->accept( *this );
[6c4ff37]327 output << "(";
[51587aa]328 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]329 output << ")";
[51587aa]330 } // if
331 }
[71f4e4f]332
[6c4ff37]333 void CodeGenerator::visit( UntypedExpr *untypedExpr ) {
[51587aa]334 if ( NameExpr *nameExpr = dynamic_cast< NameExpr* >( untypedExpr->get_function() ) ) {
335 OperatorInfo opInfo;
336 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
337 std::list< Expression* >::iterator arg = untypedExpr->get_args().begin();
338 switch ( opInfo.type ) {
339 case OT_INDEX:
340 assert( untypedExpr->get_args().size() == 2 );
341 (*arg++)->accept( *this );
[6c4ff37]342 output << "[";
[51587aa]343 (*arg)->accept( *this );
[6c4ff37]344 output << "]";
[51587aa]345 break;
[71f4e4f]346
[51587aa]347 case OT_CALL:
[f1e012b]348 assert( false );
349
[1840193]350 case OT_CTOR:
351 case OT_DTOR:
[f1e012b]352 // intrinsic constructors should never be called
353 // intrinsic destructors do nothing
[51587aa]354 break;
[71f4e4f]355
[51587aa]356 case OT_PREFIX:
357 case OT_PREFIXASSIGN:
[de62360d]358 case OT_LABELADDRESS:
[51587aa]359 assert( untypedExpr->get_args().size() == 1 );
[6c4ff37]360 output << "(";
361 output << opInfo.symbol;
[51587aa]362 (*arg)->accept( *this );
[6c4ff37]363 output << ")";
[51587aa]364 break;
[71f4e4f]365
[51587aa]366 case OT_POSTFIX:
367 case OT_POSTFIXASSIGN:
368 assert( untypedExpr->get_args().size() == 1 );
369 (*arg)->accept( *this );
[6c4ff37]370 output << opInfo.symbol;
[51587aa]371 break;
[71f4e4f]372
[51587aa]373 case OT_INFIX:
374 case OT_INFIXASSIGN:
375 assert( untypedExpr->get_args().size() == 2 );
[6c4ff37]376 output << "(";
[51587aa]377 (*arg++)->accept( *this );
[6c4ff37]378 output << opInfo.symbol;
[51587aa]379 (*arg)->accept( *this );
[6c4ff37]380 output << ")";
[51587aa]381 break;
[71f4e4f]382
[51587aa]383 case OT_CONSTANT:
384 // there are no intrinsic definitions of 0 or 1 as functions
385 assert( false );
386 }
387 } else {
388 nameExpr->accept( *this );
[6c4ff37]389 output << "(";
[51587aa]390 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
[6c4ff37]391 output << ")";
[51587aa]392 } // if
393 } else {
394 untypedExpr->get_function()->accept( *this );
[6c4ff37]395 output << "(";
[51587aa]396 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
[6c4ff37]397 output << ")";
[51587aa]398 } // if
399 }
[71f4e4f]400
[6c4ff37]401 void CodeGenerator::visit( NameExpr *nameExpr ) {
[51587aa]402 OperatorInfo opInfo;
403 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
404 assert( opInfo.type == OT_CONSTANT );
[6c4ff37]405 output << opInfo.symbol;
[51587aa]406 } else {
[6c4ff37]407 output << nameExpr->get_name();
[51587aa]408 } // if
409 }
[71f4e4f]410
[6c4ff37]411 void CodeGenerator::visit( AddressExpr *addressExpr ) {
412 output << "(&";
[51587aa]413 // this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address
414 if ( VariableExpr *variableExpr = dynamic_cast< VariableExpr* >( addressExpr->get_arg() ) ) {
[6c4ff37]415 output << mangleName( variableExpr->get_var() );
[51587aa]416 } else {
417 addressExpr->get_arg()->accept( *this );
418 } // if
[6c4ff37]419 output << ")";
[51587aa]420 }
421
[6c4ff37]422 void CodeGenerator::visit( CastExpr *castExpr ) {
[803deb1]423 output << "(";
424 if ( castExpr->get_results().empty() ) {
425 output << "(void)" ;
426 } else if ( ! castExpr->get_results().front()->get_isLvalue() ) {
427 // at least one result type of cast, but not an lvalue
428 output << "(";
429 output << genType( castExpr->get_results().front(), "" );
[71f4e4f]430 output << ")";
[803deb1]431 } else {
432 // otherwise, the cast is to an lvalue type, so the cast
433 // should be dropped, since the result of a cast is
434 // never an lvalue in C
[76b48f1]435 }
[803deb1]436 castExpr->get_arg()->accept( *this );
437 output << ")";
[51587aa]438 }
[71f4e4f]439
[6c4ff37]440 void CodeGenerator::visit( UntypedMemberExpr *memberExpr ) {
[51587aa]441 assert( false );
442 }
[71f4e4f]443
[6c4ff37]444 void CodeGenerator::visit( MemberExpr *memberExpr ) {
[51587aa]445 memberExpr->get_aggregate()->accept( *this );
[6c4ff37]446 output << "." << mangleName( memberExpr->get_member() );
[51587aa]447 }
[71f4e4f]448
[6c4ff37]449 void CodeGenerator::visit( VariableExpr *variableExpr ) {
[51587aa]450 OperatorInfo opInfo;
451 if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) {
[6c4ff37]452 output << opInfo.symbol;
[51587aa]453 } else {
[6c4ff37]454 output << mangleName( variableExpr->get_var() );
[51587aa]455 } // if
456 }
[71f4e4f]457
[6c4ff37]458 void CodeGenerator::visit( ConstantExpr *constantExpr ) {
[51587aa]459 assert( constantExpr->get_constant() );
460 constantExpr->get_constant()->accept( *this );
461 }
[71f4e4f]462
[6c4ff37]463 void CodeGenerator::visit( SizeofExpr *sizeofExpr ) {
464 output << "sizeof(";
[51587aa]465 if ( sizeofExpr->get_isType() ) {
[6c4ff37]466 output << genType( sizeofExpr->get_type(), "" );
[51587aa]467 } else {
468 sizeofExpr->get_expr()->accept( *this );
469 } // if
[6c4ff37]470 output << ")";
[51587aa]471 }
[47534159]472
[25a054f]473 void CodeGenerator::visit( AlignofExpr *alignofExpr ) {
[47534159]474 // use GCC extension to avoid bumping std to C11
475 output << "__alignof__(";
[25a054f]476 if ( alignofExpr->get_isType() ) {
477 output << genType( alignofExpr->get_type(), "" );
[47534159]478 } else {
[25a054f]479 alignofExpr->get_expr()->accept( *this );
[47534159]480 } // if
481 output << ")";
482 }
[71f4e4f]483
[2a4b088]484 void CodeGenerator::visit( UntypedOffsetofExpr *offsetofExpr ) {
485 assert( false );
486 }
487
[25a054f]488 void CodeGenerator::visit( OffsetofExpr *offsetofExpr ) {
489 // use GCC builtin
490 output << "__builtin_offsetof(";
491 output << genType( offsetofExpr->get_type(), "" );
[e551c69]492 output << ", " << mangleName( offsetofExpr->get_member() );
[25a054f]493 output << ")";
494 }
[d63eeb0]495
[6c4ff37]496 void CodeGenerator::visit( LogicalExpr *logicalExpr ) {
497 output << "(";
[51587aa]498 logicalExpr->get_arg1()->accept( *this );
499 if ( logicalExpr->get_isAnd() ) {
[6c4ff37]500 output << " && ";
[51587aa]501 } else {
[6c4ff37]502 output << " || ";
[51587aa]503 } // if
504 logicalExpr->get_arg2()->accept( *this );
[6c4ff37]505 output << ")";
[51587aa]506 }
[71f4e4f]507
[6c4ff37]508 void CodeGenerator::visit( ConditionalExpr *conditionalExpr ) {
509 output << "(";
[51587aa]510 conditionalExpr->get_arg1()->accept( *this );
[6c4ff37]511 output << " ? ";
[51587aa]512 conditionalExpr->get_arg2()->accept( *this );
[6c4ff37]513 output << " : ";
[51587aa]514 conditionalExpr->get_arg3()->accept( *this );
[6c4ff37]515 output << ")";
[51587aa]516 }
[71f4e4f]517
[6c4ff37]518 void CodeGenerator::visit( CommaExpr *commaExpr ) {
519 output << "(";
[51587aa]520 commaExpr->get_arg1()->accept( *this );
[6c4ff37]521 output << " , ";
[51587aa]522 commaExpr->get_arg2()->accept( *this );
[6c4ff37]523 output << ")";
[51587aa]524 }
[71f4e4f]525
[6c4ff37]526 void CodeGenerator::visit( TupleExpr *tupleExpr ) {}
[71f4e4f]527
[6c4ff37]528 void CodeGenerator::visit( TypeExpr *typeExpr ) {}
[2b6c1e0]529
[7f5566b]530 void CodeGenerator::visit( AsmExpr *asmExpr ) {
531 if ( asmExpr->get_inout() ) {
532 output << "[ ";
533 asmExpr->get_inout()->accept( *this );
534 output << " ] ";
535 } // if
536 asmExpr->get_constraint()->accept( *this );
537 output << " ( ";
538 asmExpr->get_operand()->accept( *this );
539 output << " )";
540 }
541
[51587aa]542 //*** Statements
[6c4ff37]543 void CodeGenerator::visit( CompoundStmt *compoundStmt ) {
[51587aa]544 std::list<Statement*> ks = compoundStmt->get_kids();
[2b6c1e0]545 output << "{" << endl;
[51587aa]546
[2b6c1e0]547 cur_indent += CodeGenerator::tabsize;
[51587aa]548
[7f5566b]549 for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) {
[cda48b6]550 output << indent << printLabels( (*i)->get_labels() );
[7f5566b]551 (*i)->accept( *this );
[2b6c1e0]552
[6c4ff37]553 output << endl;
[2b6c1e0]554 if ( wantSpacing( *i ) ) {
555 output << endl;
556 }
[51587aa]557 }
[71f4e4f]558 cur_indent -= CodeGenerator::tabsize;
[51587aa]559
[cda48b6]560 output << indent << "}";
[51587aa]561 }
562
[6c4ff37]563 void CodeGenerator::visit( ExprStmt *exprStmt ) {
[71f4e4f]564 // I don't see why this check is necessary.
565 // If this starts to cause problems then put it back in,
[6c4ff37]566 // with an explanation
567 assert( exprStmt );
568
569 // if ( exprStmt != 0 ) {
570 exprStmt->get_expr()->accept( *this );
571 output << ";" ;
572 // } // if
[51587aa]573 }
574
[7f5566b]575 void CodeGenerator::visit( AsmStmt *asmStmt ) {
576 output << "asm ";
577 if ( asmStmt->get_voltile() ) output << "volatile ";
578 if ( ! asmStmt->get_gotolabels().empty() ) output << "goto ";
579 output << "( ";
580 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
581 output << " : ";
582 genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() );
583 output << " : ";
584 genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() );
585 output << " : ";
586 genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() );
587 if ( ! asmStmt->get_gotolabels().empty() ) {
588 output << " : ";
589 for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) {
590 output << *begin++;
591 if ( begin == asmStmt->get_gotolabels().end() ) break;
592 output << ", ";
593 } // for
594 } // if
595 output << " );" ;
596 }
597
[6c4ff37]598 void CodeGenerator::visit( IfStmt *ifStmt ) {
[7f5566b]599 output << "if ( ";
600 ifStmt->get_condition()->accept( *this );
601 output << " ) ";
[51587aa]602
[7f5566b]603 ifStmt->get_thenPart()->accept( *this );
[51587aa]604
605 if ( ifStmt->get_elsePart() != 0) {
[2b6c1e0]606 output << " else ";
[7f5566b]607 ifStmt->get_elsePart()->accept( *this );
[51587aa]608 } // if
609 }
610
[6c4ff37]611 void CodeGenerator::visit( SwitchStmt *switchStmt ) {
[7f5566b]612 output << "switch ( " ;
613 switchStmt->get_condition()->accept( *this );
614 output << " ) ";
[71f4e4f]615
[2b6c1e0]616 output << "{" << std::endl;
[6c4ff37]617 cur_indent += CodeGenerator::tabsize;
[51587aa]618
[6c4ff37]619 acceptAll( switchStmt->get_branches(), *this );
[51587aa]620
[6c4ff37]621 cur_indent -= CodeGenerator::tabsize;
[51587aa]622
[cda48b6]623 output << indent << "}";
[51587aa]624 }
625
[6c4ff37]626 void CodeGenerator::visit( CaseStmt *caseStmt ) {
[cda48b6]627 output << indent;
[eb3261f]628 if ( caseStmt->isDefault()) {
[2b6c1e0]629 output << "default";
[eb3261f]630 } else {
[2b6c1e0]631 output << "case ";
[7f5566b]632 caseStmt->get_condition()->accept( *this );
[17cd4eb]633 } // if
[6c4ff37]634 output << ":\n";
[71f4e4f]635
[51587aa]636 std::list<Statement *> sts = caseStmt->get_statements();
637
[6c4ff37]638 cur_indent += CodeGenerator::tabsize;
[51587aa]639 for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) {
[cda48b6]640 output << indent << printLabels( (*i)->get_labels() ) ;
[7f5566b]641 (*i)->accept( *this );
[6c4ff37]642 output << endl;
[51587aa]643 }
[6c4ff37]644 cur_indent -= CodeGenerator::tabsize;
[51587aa]645 }
646
[6c4ff37]647 void CodeGenerator::visit( BranchStmt *branchStmt ) {
[51587aa]648 switch ( branchStmt->get_type()) {
649 case BranchStmt::Goto:
650 if ( ! branchStmt->get_target().empty() )
[6c4ff37]651 output << "goto " << branchStmt->get_target();
[71f4e4f]652 else {
[51587aa]653 if ( branchStmt->get_computedTarget() != 0 ) {
[6c4ff37]654 output << "goto *";
[51587aa]655 branchStmt->get_computedTarget()->accept( *this );
656 } // if
657 } // if
658 break;
659 case BranchStmt::Break:
[6c4ff37]660 output << "break";
[51587aa]661 break;
662 case BranchStmt::Continue:
[6c4ff37]663 output << "continue";
[51587aa]664 break;
665 }
[2b6c1e0]666 output << ";";
[51587aa]667 }
668
669
[6c4ff37]670 void CodeGenerator::visit( ReturnStmt *returnStmt ) {
671 output << "return ";
[51587aa]672
673 // xxx -- check for null expression;
674 if ( returnStmt->get_expr() ) {
675 returnStmt->get_expr()->accept( *this );
676 } // if
[6c4ff37]677 output << ";";
[51587aa]678 }
679
[6c4ff37]680 void CodeGenerator::visit( WhileStmt *whileStmt ) {
[51587aa]681 if ( whileStmt->get_isDoWhile() )
[6c4ff37]682 output << "do" ;
[51587aa]683 else {
[6c4ff37]684 output << "while (" ;
[7f5566b]685 whileStmt->get_condition()->accept( *this );
[6c4ff37]686 output << ")";
[51587aa]687 } // if
[2b6c1e0]688 output << " ";
[51587aa]689
[2b6c1e0]690 output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() );
[51587aa]691 whileStmt->get_body()->accept( *this );
692
[cda48b6]693 output << indent;
[51587aa]694
695 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]696 output << " while (" ;
[7f5566b]697 whileStmt->get_condition()->accept( *this );
[6c4ff37]698 output << ");";
[51587aa]699 } // if
700 }
701
[6c4ff37]702 void CodeGenerator::visit( ForStmt *forStmt ) {
[71f4e4f]703 // initialization is always hoisted, so don't
704 // bother doing anything with that
[145f1fc]705 output << "for (;";
[51587aa]706
707 if ( forStmt->get_condition() != 0 )
708 forStmt->get_condition()->accept( *this );
[6c4ff37]709 output << ";";
[51587aa]710
711 if ( forStmt->get_increment() != 0 )
712 forStmt->get_increment()->accept( *this );
[2b6c1e0]713 output << ") ";
[51587aa]714
715 if ( forStmt->get_body() != 0 ) {
[2b6c1e0]716 output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() );
[51587aa]717 forStmt->get_body()->accept( *this );
718 } // if
719 }
720
[6c4ff37]721 void CodeGenerator::visit( NullStmt *nullStmt ) {
[cda48b6]722 //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() );
[6c4ff37]723 output << "/* null statement */ ;";
[51587aa]724 }
725
[6c4ff37]726 void CodeGenerator::visit( DeclStmt *declStmt ) {
[51587aa]727 declStmt->get_decl()->accept( *this );
[71f4e4f]728
[51587aa]729 if ( doSemicolon( declStmt->get_decl() ) ) {
[6c4ff37]730 output << ";";
[51587aa]731 } // if
732 }
733
[6c4ff37]734 std::string CodeGenerator::printLabels( std::list< Label > &l ) {
[51587aa]735 std::string str( "" );
[6c4ff37]736 l.unique(); // assumes a sorted list. Why not use set?
[51587aa]737
738 for ( std::list< Label >::iterator i = l.begin(); i != l.end(); i++ )
739 str += *i + ": ";
740
741 return str;
742 }
743
[6c4ff37]744 void CodeGenerator::handleStorageClass( Declaration *decl ) {
[51587aa]745 switch ( decl->get_storageClass() ) {
[68cd1ce]746 case DeclarationNode::Extern:
[6c4ff37]747 output << "extern ";
[51587aa]748 break;
[68cd1ce]749 case DeclarationNode::Static:
[6c4ff37]750 output << "static ";
[51587aa]751 break;
[68cd1ce]752 case DeclarationNode::Auto:
[51587aa]753 // silently drop storage class
754 break;
[68cd1ce]755 case DeclarationNode::Register:
[6c4ff37]756 output << "register ";
[51587aa]757 break;
[68cd1ce]758 case DeclarationNode::Inline:
[de62360d]759 output << "inline ";
[f38c8d9]760 break;
[68cd1ce]761 case DeclarationNode::Fortran:
762 output << "fortran ";
763 break;
764 case DeclarationNode::Noreturn:
765 output << "_Noreturn ";
766 break;
767 case DeclarationNode::Threadlocal:
768 output << "_Thread_local ";
769 break;
770 case DeclarationNode::NoStorageClass:
[f38c8d9]771 break;
[843054c2]772 } // switch
[51587aa]773 }
[51b73452]774} // namespace CodeGen
[51587aa]775
776// Local Variables: //
777// tab-width: 4 //
778// mode: c++ //
779// compile-command: "make install" //
780// End: //
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