source: src/CodeGen/CodeGenerator.cc@ fd61a4f

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 fd61a4f was 7baed7d, checked in by Rob Schluntz <rschlunt@…>, 9 years ago

generalize notion of a GCC attribute
  • Property mode set to 100644
File size: 23.5 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
[9e2c1f0]12// Last Modified On : Fri May 06 16:01:00 2016
[d63eeb0]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
[e8032b0]23#include "SynTree/Declaration.h"
[51b73452]24#include "SynTree/Expression.h"
25#include "SynTree/Initializer.h"
[68cd1ce]26#include "SynTree/Statement.h"
[e8032b0]27#include "SynTree/Type.h"
[7baed7d]28#include "SynTree/Attribute.h"
[51b73452]29
[d3b7937]30#include "Common/utility.h"
31#include "Common/UnimplementedError.h"
[51b73452]32
[a61fea9a]33#include "CodeGenerator.h"
[51b73452]34#include "OperatorTable.h"
35#include "GenType.h"
36
[10a7775]37#include "InitTweak/InitTweak.h"
38
[51b73452]39using namespace std;
40
41namespace CodeGen {
[6c4ff37]42 int CodeGenerator::tabsize = 4;
[51587aa]43
[145f1fc]44 // the kinds of statements that would ideally be followed by whitespace
[2b6c1e0]45 bool wantSpacing( Statement * stmt) {
46 return dynamic_cast< IfStmt * >( stmt ) || dynamic_cast< CompoundStmt * >( stmt ) ||
47 dynamic_cast< WhileStmt * >( stmt ) || dynamic_cast< ForStmt * > ( stmt ) || dynamic_cast< SwitchStmt *>( stmt );
48 }
49
[cda48b6]50 ostream & CodeGenerator::Indenter::operator()( ostream & output ) {
51 return output << string( cg.cur_indent, ' ' );
52 }
53
54 ostream & operator<<( ostream & output, CodeGenerator::Indenter &indent ) {
55 return indent( output );
56 }
[51587aa]57
[7f5566b]58 CodeGenerator::CodeGenerator( std::ostream &os ) : indent( *this), cur_indent( 0 ), insideFunction( false ), output( os ) { }
[cda48b6]59
60 CodeGenerator::CodeGenerator( std::ostream &os, std::string init, int indentation, bool infunp )
[7f5566b]61 : indent( *this), cur_indent( indentation ), insideFunction( infunp ), output( os ) {
[6c4ff37]62 //output << std::string( init );
[51587aa]63 }
64
[cda48b6]65 CodeGenerator::CodeGenerator( std::ostream &os, char *init, int indentation, bool infunp )
[7f5566b]66 : indent( *this ), cur_indent( indentation ), insideFunction( infunp ), output( os ) {
[6c4ff37]67 //output << std::string( init );
[51587aa]68 }
69
70 string mangleName( DeclarationWithType *decl ) {
71 if ( decl->get_mangleName() != "" ) {
[f326f99]72 // need to incorporate scope level in order to differentiate names for destructors
73 return decl->get_scopedMangleName();
[51587aa]74 } else {
75 return decl->get_name();
76 } // if
77 }
[94b4364]78
[7baed7d]79 void CodeGenerator::genAttributes( std::list< Attribute * > & attributes ) {
80 if ( ! attributes.empty() ) {
81 output << "__attribute__ ((";
82 for ( Attribute *& attr : attributes ) {
83 if ( ! attr->empty() ) {
84 output << attr->get_name() << "(";
85 genCommaList( attr->get_parameters().begin(), attr->get_parameters().end() );
86 output << ")";
[03e5d14]87 }
[7baed7d]88 output << ",";
89 }
90 output << ")) ";
[4e24610]91 }
[7baed7d]92 }
93
94
95 //*** Declarations
96 void CodeGenerator::visit( FunctionDecl *functionDecl ) {
97 genAttributes( functionDecl->get_attributes() );
98
[51587aa]99 handleStorageClass( functionDecl );
[f38c8d9]100 if ( functionDecl->get_isInline() ) {
[6c4ff37]101 output << "inline ";
[f38c8d9]102 } // if
[de62360d]103 if ( functionDecl->get_isNoreturn() ) {
104 output << "_Noreturn ";
105 } // if
[6c4ff37]106 output << genType( functionDecl->get_functionType(), mangleName( functionDecl ) );
[51587aa]107
108 // how to get this to the Functype?
109 std::list< Declaration * > olds = functionDecl->get_oldDecls();
110 if ( ! olds.empty() ) {
[6c4ff37]111 output << " /* function has old declaration */";
[51587aa]112 } // if
113
114 // acceptAll( functionDecl->get_oldDecls(), *this );
115 if ( functionDecl->get_statements() ) {
[7f5566b]116 functionDecl->get_statements()->accept( *this );
[51587aa]117 } // if
118 }
119
[6c4ff37]120 void CodeGenerator::visit( ObjectDecl *objectDecl ) {
[51587aa]121 handleStorageClass( objectDecl );
[6c4ff37]122 output << genType( objectDecl->get_type(), mangleName( objectDecl ) );
[71f4e4f]123
[51587aa]124 if ( objectDecl->get_init() ) {
[6c4ff37]125 output << " = ";
[51587aa]126 objectDecl->get_init()->accept( *this );
127 } // if
128 if ( objectDecl->get_bitfieldWidth() ) {
[6c4ff37]129 output << ":";
[51587aa]130 objectDecl->get_bitfieldWidth()->accept( *this );
131 } // if
132 }
133
[6c4ff37]134 void CodeGenerator::handleAggregate( AggregateDecl *aggDecl ) {
[51587aa]135 if ( aggDecl->get_name() != "" )
[6c4ff37]136 output << aggDecl->get_name();
[71f4e4f]137
[51587aa]138 std::list< Declaration * > &memb = aggDecl->get_members();
139
140 if ( ! memb.empty() ) {
[94b4364]141 output << " {" << endl;
[51587aa]142
[71f4e4f]143 cur_indent += CodeGenerator::tabsize;
[51587aa]144 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) {
[71f4e4f]145 output << indent;
[7f5566b]146 (*i)->accept( *this );
[6c4ff37]147 output << ";" << endl;
[51587aa]148 }
149
[71f4e4f]150 cur_indent -= CodeGenerator::tabsize;
[51587aa]151
[cda48b6]152 output << indent << "}";
[17cd4eb]153 } // if
[51587aa]154 }
[17cd4eb]155
[6c4ff37]156 void CodeGenerator::visit( StructDecl *structDecl ) {
157 output << "struct ";
[51587aa]158 handleAggregate( structDecl );
159 }
[17cd4eb]160
[6c4ff37]161 void CodeGenerator::visit( UnionDecl *aggregateDecl ) {
162 output << "union ";
[51587aa]163 handleAggregate( aggregateDecl );
164 }
[71f4e4f]165
[6c4ff37]166 void CodeGenerator::visit( EnumDecl *aggDecl ) {
167 output << "enum ";
[51587aa]168
169 if ( aggDecl->get_name() != "" )
[6c4ff37]170 output << aggDecl->get_name();
[71f4e4f]171
[51587aa]172 std::list< Declaration* > &memb = aggDecl->get_members();
173
174 if ( ! memb.empty() ) {
[cda48b6]175 output << " {" << endl;
[51587aa]176
[71f4e4f]177 cur_indent += CodeGenerator::tabsize;
[51587aa]178 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) {
179 ObjectDecl *obj = dynamic_cast< ObjectDecl* >( *i );
180 assert( obj );
[71f4e4f]181 output << indent << mangleName( obj );
[51587aa]182 if ( obj->get_init() ) {
[6c4ff37]183 output << " = ";
[7f5566b]184 obj->get_init()->accept( *this );
[51587aa]185 } // if
[6c4ff37]186 output << "," << endl;
[51587aa]187 } // for
188
[71f4e4f]189 cur_indent -= CodeGenerator::tabsize;
[51587aa]190
[cda48b6]191 output << indent << "}";
[51587aa]192 } // if
193 }
[71f4e4f]194
[4040425]195 void CodeGenerator::visit( TraitDecl *aggregateDecl ) {}
[71f4e4f]196
[6c4ff37]197 void CodeGenerator::visit( TypedefDecl *typeDecl ) {
198 output << "typedef ";
199 output << genType( typeDecl->get_base(), typeDecl->get_name() );
[51587aa]200 }
[71f4e4f]201
[6c4ff37]202 void CodeGenerator::visit( TypeDecl *typeDecl ) {
[51587aa]203 // really, we should mutate this into something that isn't a TypeDecl but that requires large-scale changes,
204 // still to be done
[6c4ff37]205 output << "extern unsigned long " << typeDecl->get_name();
[51587aa]206 if ( typeDecl->get_base() ) {
[6c4ff37]207 output << " = sizeof( " << genType( typeDecl->get_base(), "" ) << " )";
[51587aa]208 } // if
209 }
210
[e45215c]211 void CodeGenerator::printDesignators( std::list< Expression * > & designators ) {
212 typedef std::list< Expression * > DesignatorList;
213 if ( designators.size() == 0 ) return;
214 for ( DesignatorList::iterator iter = designators.begin(); iter != designators.end(); ++iter ) {
[8a4da06]215 if ( dynamic_cast< NameExpr * >( *iter ) ) {
[f32c7f4]216 // if expression is a name, then initializing aggregate member
217 output << ".";
218 (*iter)->accept( *this );
219 } else {
220 // if not a simple name, it has to be a constant expression, i.e. an array designator
[e45215c]221 output << "[";
222 (*iter)->accept( *this );
223 output << "]";
224 }
225 }
226 output << " = ";
227 }
228
[6c4ff37]229 void CodeGenerator::visit( SingleInit *init ) {
[e45215c]230 printDesignators( init->get_designators() );
[51587aa]231 init->get_value()->accept( *this );
232 }
233
[6c4ff37]234 void CodeGenerator::visit( ListInit *init ) {
[e45215c]235 printDesignators( init->get_designators() );
[6c4ff37]236 output << "{ ";
[5b40f30]237 if ( init->begin_initializers() == init->end_initializers() ) {
238 // illegal to leave initializer list empty for scalar initializers,
239 // but always legal to have 0
240 output << "0";
241 } else {
242 genCommaList( init->begin_initializers(), init->end_initializers() );
243 }
[6c4ff37]244 output << " }";
[51587aa]245 }
246
[71f4e4f]247 void CodeGenerator::visit( Constant *constant ) {
[6c4ff37]248 output << constant->get_value() ;
[51587aa]249 }
250
251 //*** Expressions
[6c4ff37]252 void CodeGenerator::visit( ApplicationExpr *applicationExpr ) {
[51587aa]253 if ( VariableExpr *varExpr = dynamic_cast< VariableExpr* >( applicationExpr->get_function() ) ) {
254 OperatorInfo opInfo;
255 if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( varExpr->get_var()->get_name(), opInfo ) ) {
256 std::list< Expression* >::iterator arg = applicationExpr->get_args().begin();
257 switch ( opInfo.type ) {
258 case OT_PREFIXASSIGN:
259 case OT_POSTFIXASSIGN:
260 case OT_INFIXASSIGN:
[64071c2]261 case OT_CTOR:
262 case OT_DTOR:
[51587aa]263 {
264 assert( arg != applicationExpr->get_args().end() );
265 if ( AddressExpr *addrExpr = dynamic_cast< AddressExpr * >( *arg ) ) {
[356189a]266 // remove & from first assignment/ctor argument
[51587aa]267 *arg = addrExpr->get_arg();
268 } else {
[356189a]269 // no address-of operator, so must be a pointer - add dereference
[51587aa]270 UntypedExpr *newExpr = new UntypedExpr( new NameExpr( "*?" ) );
271 newExpr->get_args().push_back( *arg );
[10a7775]272 assert( (*arg)->get_results().size() == 1 );
273 Type * type = InitTweak::getPointerBase( (*arg)->get_results().front() );
274 assert( type );
275 newExpr->get_results().push_back( type );
[51587aa]276 *arg = newExpr;
277 } // if
278 break;
279 }
[71f4e4f]280
[51587aa]281 default:
282 // do nothing
283 ;
284 }
[71f4e4f]285
[51587aa]286 switch ( opInfo.type ) {
287 case OT_INDEX:
288 assert( applicationExpr->get_args().size() == 2 );
289 (*arg++)->accept( *this );
[6c4ff37]290 output << "[";
[51587aa]291 (*arg)->accept( *this );
[6c4ff37]292 output << "]";
[51587aa]293 break;
[71f4e4f]294
[51587aa]295 case OT_CALL:
[356189a]296 // there are no intrinsic definitions of the function call operator
[51587aa]297 assert( false );
298 break;
[71f4e4f]299
[f1e012b]300 case OT_CTOR:
[c2ce2350]301 case OT_DTOR:
[356189a]302 if ( applicationExpr->get_args().size() == 1 ) {
[c2ce2350]303 // the expression fed into a single parameter constructor or destructor
[64071c2]304 // may contain side effects, so must still output this expression
305 output << "(";
[356189a]306 (*arg++)->accept( *this );
[64071c2]307 output << ") /* " << opInfo.inputName << " */";
[356189a]308 } else if ( applicationExpr->get_args().size() == 2 ) {
[c2ce2350]309 // intrinsic two parameter constructors are essentially bitwise assignment
[356189a]310 output << "(";
311 (*arg++)->accept( *this );
312 output << opInfo.symbol;
313 (*arg)->accept( *this );
[c2ce2350]314 output << ") /* " << opInfo.inputName << " */";
[356189a]315 } else {
[c2ce2350]316 // no constructors with 0 or more than 2 parameters
[356189a]317 assert( false );
318 }
319 break;
[f1e012b]320
[51587aa]321 case OT_PREFIX:
322 case OT_PREFIXASSIGN:
323 assert( applicationExpr->get_args().size() == 1 );
[6c4ff37]324 output << "(";
325 output << opInfo.symbol;
[51587aa]326 (*arg)->accept( *this );
[6c4ff37]327 output << ")";
[51587aa]328 break;
[71f4e4f]329
[51587aa]330 case OT_POSTFIX:
331 case OT_POSTFIXASSIGN:
332 assert( applicationExpr->get_args().size() == 1 );
333 (*arg)->accept( *this );
[6c4ff37]334 output << opInfo.symbol;
[51587aa]335 break;
336
[f1e012b]337
[51587aa]338 case OT_INFIX:
339 case OT_INFIXASSIGN:
340 assert( applicationExpr->get_args().size() == 2 );
[6c4ff37]341 output << "(";
[51587aa]342 (*arg++)->accept( *this );
[6c4ff37]343 output << opInfo.symbol;
[51587aa]344 (*arg)->accept( *this );
[6c4ff37]345 output << ")";
[51587aa]346 break;
[71f4e4f]347
[51587aa]348 case OT_CONSTANT:
[721f17a]349 case OT_LABELADDRESS:
350 // there are no intrinsic definitions of 0/1 or label addresses as functions
[51587aa]351 assert( false );
352 }
[17cd4eb]353 } else {
[51587aa]354 varExpr->accept( *this );
[6c4ff37]355 output << "(";
[51587aa]356 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]357 output << ")";
[17cd4eb]358 } // if
[51587aa]359 } else {
360 applicationExpr->get_function()->accept( *this );
[6c4ff37]361 output << "(";
[51587aa]362 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]363 output << ")";
[51587aa]364 } // if
365 }
[71f4e4f]366
[6c4ff37]367 void CodeGenerator::visit( UntypedExpr *untypedExpr ) {
[51587aa]368 if ( NameExpr *nameExpr = dynamic_cast< NameExpr* >( untypedExpr->get_function() ) ) {
369 OperatorInfo opInfo;
370 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
371 std::list< Expression* >::iterator arg = untypedExpr->get_args().begin();
372 switch ( opInfo.type ) {
373 case OT_INDEX:
374 assert( untypedExpr->get_args().size() == 2 );
375 (*arg++)->accept( *this );
[6c4ff37]376 output << "[";
[51587aa]377 (*arg)->accept( *this );
[6c4ff37]378 output << "]";
[51587aa]379 break;
[71f4e4f]380
[51587aa]381 case OT_CALL:
[f1e012b]382 assert( false );
383
[c2ce2350]384
385 case OT_CTOR:
386 case OT_DTOR:
387 if ( untypedExpr->get_args().size() == 1 ) {
388 // the expression fed into a single parameter constructor or destructor
[64071c2]389 // may contain side effects, so must still output this expression
390 output << "(";
[c2ce2350]391 (*arg++)->accept( *this );
[64071c2]392 output << ") /* " << opInfo.inputName << " */";
[c2ce2350]393 } else if ( untypedExpr->get_args().size() == 2 ) {
394 // intrinsic two parameter constructors are essentially bitwise assignment
395 output << "(";
396 (*arg++)->accept( *this );
397 output << opInfo.symbol;
398 (*arg)->accept( *this );
399 output << ") /* " << opInfo.inputName << " */";
400 } else {
401 // no constructors with 0 or more than 2 parameters
402 assert( false );
403 }
[51587aa]404 break;
[71f4e4f]405
[51587aa]406 case OT_PREFIX:
407 case OT_PREFIXASSIGN:
[de62360d]408 case OT_LABELADDRESS:
[51587aa]409 assert( untypedExpr->get_args().size() == 1 );
[6c4ff37]410 output << "(";
411 output << opInfo.symbol;
[51587aa]412 (*arg)->accept( *this );
[6c4ff37]413 output << ")";
[51587aa]414 break;
[71f4e4f]415
[51587aa]416 case OT_POSTFIX:
417 case OT_POSTFIXASSIGN:
418 assert( untypedExpr->get_args().size() == 1 );
419 (*arg)->accept( *this );
[6c4ff37]420 output << opInfo.symbol;
[51587aa]421 break;
[71f4e4f]422
[51587aa]423 case OT_INFIX:
424 case OT_INFIXASSIGN:
425 assert( untypedExpr->get_args().size() == 2 );
[6c4ff37]426 output << "(";
[51587aa]427 (*arg++)->accept( *this );
[6c4ff37]428 output << opInfo.symbol;
[51587aa]429 (*arg)->accept( *this );
[6c4ff37]430 output << ")";
[51587aa]431 break;
[71f4e4f]432
[51587aa]433 case OT_CONSTANT:
434 // there are no intrinsic definitions of 0 or 1 as functions
435 assert( false );
436 }
437 } else {
438 nameExpr->accept( *this );
[6c4ff37]439 output << "(";
[51587aa]440 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
[6c4ff37]441 output << ")";
[51587aa]442 } // if
443 } else {
444 untypedExpr->get_function()->accept( *this );
[6c4ff37]445 output << "(";
[51587aa]446 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
[6c4ff37]447 output << ")";
[51587aa]448 } // if
449 }
[71f4e4f]450
[6c4ff37]451 void CodeGenerator::visit( NameExpr *nameExpr ) {
[51587aa]452 OperatorInfo opInfo;
453 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
454 assert( opInfo.type == OT_CONSTANT );
[6c4ff37]455 output << opInfo.symbol;
[51587aa]456 } else {
[6c4ff37]457 output << nameExpr->get_name();
[51587aa]458 } // if
459 }
[71f4e4f]460
[6c4ff37]461 void CodeGenerator::visit( AddressExpr *addressExpr ) {
462 output << "(&";
[51587aa]463 // this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address
464 if ( VariableExpr *variableExpr = dynamic_cast< VariableExpr* >( addressExpr->get_arg() ) ) {
[6c4ff37]465 output << mangleName( variableExpr->get_var() );
[51587aa]466 } else {
467 addressExpr->get_arg()->accept( *this );
468 } // if
[6c4ff37]469 output << ")";
[51587aa]470 }
471
[6c4ff37]472 void CodeGenerator::visit( CastExpr *castExpr ) {
[803deb1]473 output << "(";
474 if ( castExpr->get_results().empty() ) {
475 output << "(void)" ;
476 } else if ( ! castExpr->get_results().front()->get_isLvalue() ) {
477 // at least one result type of cast, but not an lvalue
478 output << "(";
479 output << genType( castExpr->get_results().front(), "" );
[71f4e4f]480 output << ")";
[803deb1]481 } else {
482 // otherwise, the cast is to an lvalue type, so the cast
483 // should be dropped, since the result of a cast is
484 // never an lvalue in C
[76b48f1]485 }
[803deb1]486 castExpr->get_arg()->accept( *this );
487 output << ")";
[51587aa]488 }
[71f4e4f]489
[6c4ff37]490 void CodeGenerator::visit( UntypedMemberExpr *memberExpr ) {
[51587aa]491 assert( false );
492 }
[71f4e4f]493
[6c4ff37]494 void CodeGenerator::visit( MemberExpr *memberExpr ) {
[51587aa]495 memberExpr->get_aggregate()->accept( *this );
[6c4ff37]496 output << "." << mangleName( memberExpr->get_member() );
[51587aa]497 }
[71f4e4f]498
[6c4ff37]499 void CodeGenerator::visit( VariableExpr *variableExpr ) {
[51587aa]500 OperatorInfo opInfo;
501 if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) {
[6c4ff37]502 output << opInfo.symbol;
[51587aa]503 } else {
[6c4ff37]504 output << mangleName( variableExpr->get_var() );
[51587aa]505 } // if
506 }
[71f4e4f]507
[6c4ff37]508 void CodeGenerator::visit( ConstantExpr *constantExpr ) {
[51587aa]509 assert( constantExpr->get_constant() );
510 constantExpr->get_constant()->accept( *this );
511 }
[71f4e4f]512
[6c4ff37]513 void CodeGenerator::visit( SizeofExpr *sizeofExpr ) {
514 output << "sizeof(";
[51587aa]515 if ( sizeofExpr->get_isType() ) {
[6c4ff37]516 output << genType( sizeofExpr->get_type(), "" );
[51587aa]517 } else {
518 sizeofExpr->get_expr()->accept( *this );
519 } // if
[6c4ff37]520 output << ")";
[51587aa]521 }
[47534159]522
[25a054f]523 void CodeGenerator::visit( AlignofExpr *alignofExpr ) {
[47534159]524 // use GCC extension to avoid bumping std to C11
525 output << "__alignof__(";
[25a054f]526 if ( alignofExpr->get_isType() ) {
527 output << genType( alignofExpr->get_type(), "" );
[47534159]528 } else {
[25a054f]529 alignofExpr->get_expr()->accept( *this );
[47534159]530 } // if
531 output << ")";
532 }
[71f4e4f]533
[2a4b088]534 void CodeGenerator::visit( UntypedOffsetofExpr *offsetofExpr ) {
[afc1045]535 assert( false && "UntypedOffsetofExpr should not reach code generation" );
[2a4b088]536 }
537
[25a054f]538 void CodeGenerator::visit( OffsetofExpr *offsetofExpr ) {
539 // use GCC builtin
540 output << "__builtin_offsetof(";
541 output << genType( offsetofExpr->get_type(), "" );
[e551c69]542 output << ", " << mangleName( offsetofExpr->get_member() );
[25a054f]543 output << ")";
544 }
[d63eeb0]545
[afc1045]546 void CodeGenerator::visit( OffsetPackExpr *offsetPackExpr ) {
547 assert( false && "OffsetPackExpr should not reach code generation" );
548 }
[70a06f6]549
[6c4ff37]550 void CodeGenerator::visit( LogicalExpr *logicalExpr ) {
551 output << "(";
[51587aa]552 logicalExpr->get_arg1()->accept( *this );
553 if ( logicalExpr->get_isAnd() ) {
[6c4ff37]554 output << " && ";
[51587aa]555 } else {
[6c4ff37]556 output << " || ";
[51587aa]557 } // if
558 logicalExpr->get_arg2()->accept( *this );
[6c4ff37]559 output << ")";
[51587aa]560 }
[71f4e4f]561
[6c4ff37]562 void CodeGenerator::visit( ConditionalExpr *conditionalExpr ) {
563 output << "(";
[51587aa]564 conditionalExpr->get_arg1()->accept( *this );
[6c4ff37]565 output << " ? ";
[51587aa]566 conditionalExpr->get_arg2()->accept( *this );
[6c4ff37]567 output << " : ";
[51587aa]568 conditionalExpr->get_arg3()->accept( *this );
[6c4ff37]569 output << ")";
[51587aa]570 }
[71f4e4f]571
[6c4ff37]572 void CodeGenerator::visit( CommaExpr *commaExpr ) {
573 output << "(";
[51587aa]574 commaExpr->get_arg1()->accept( *this );
[6c4ff37]575 output << " , ";
[51587aa]576 commaExpr->get_arg2()->accept( *this );
[6c4ff37]577 output << ")";
[51587aa]578 }
[71f4e4f]579
[6c4ff37]580 void CodeGenerator::visit( TupleExpr *tupleExpr ) {}
[71f4e4f]581
[6c4ff37]582 void CodeGenerator::visit( TypeExpr *typeExpr ) {}
[2b6c1e0]583
[7f5566b]584 void CodeGenerator::visit( AsmExpr *asmExpr ) {
585 if ( asmExpr->get_inout() ) {
586 output << "[ ";
587 asmExpr->get_inout()->accept( *this );
588 output << " ] ";
589 } // if
590 asmExpr->get_constraint()->accept( *this );
591 output << " ( ";
592 asmExpr->get_operand()->accept( *this );
593 output << " )";
594 }
595
[51587aa]596 //*** Statements
[6c4ff37]597 void CodeGenerator::visit( CompoundStmt *compoundStmt ) {
[51587aa]598 std::list<Statement*> ks = compoundStmt->get_kids();
[2b6c1e0]599 output << "{" << endl;
[51587aa]600
[2b6c1e0]601 cur_indent += CodeGenerator::tabsize;
[51587aa]602
[7f5566b]603 for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) {
[cda48b6]604 output << indent << printLabels( (*i)->get_labels() );
[7f5566b]605 (*i)->accept( *this );
[2b6c1e0]606
[6c4ff37]607 output << endl;
[2b6c1e0]608 if ( wantSpacing( *i ) ) {
609 output << endl;
610 }
[51587aa]611 }
[71f4e4f]612 cur_indent -= CodeGenerator::tabsize;
[51587aa]613
[cda48b6]614 output << indent << "}";
[51587aa]615 }
616
[6c4ff37]617 void CodeGenerator::visit( ExprStmt *exprStmt ) {
618 assert( exprStmt );
[321a2481]619 // cast the top-level expression to void to reduce gcc warnings.
620 Expression * expr = new CastExpr( exprStmt->get_expr() );
621 expr->accept( *this );
622 output << ";";
[51587aa]623 }
624
[7f5566b]625 void CodeGenerator::visit( AsmStmt *asmStmt ) {
626 output << "asm ";
627 if ( asmStmt->get_voltile() ) output << "volatile ";
628 if ( ! asmStmt->get_gotolabels().empty() ) output << "goto ";
629 output << "( ";
630 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
631 output << " : ";
632 genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() );
633 output << " : ";
634 genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() );
635 output << " : ";
636 genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() );
637 if ( ! asmStmt->get_gotolabels().empty() ) {
638 output << " : ";
639 for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) {
640 output << *begin++;
641 if ( begin == asmStmt->get_gotolabels().end() ) break;
642 output << ", ";
643 } // for
644 } // if
645 output << " );" ;
646 }
647
[6c4ff37]648 void CodeGenerator::visit( IfStmt *ifStmt ) {
[7f5566b]649 output << "if ( ";
650 ifStmt->get_condition()->accept( *this );
651 output << " ) ";
[51587aa]652
[7f5566b]653 ifStmt->get_thenPart()->accept( *this );
[51587aa]654
655 if ( ifStmt->get_elsePart() != 0) {
[2b6c1e0]656 output << " else ";
[7f5566b]657 ifStmt->get_elsePart()->accept( *this );
[51587aa]658 } // if
659 }
660
[6c4ff37]661 void CodeGenerator::visit( SwitchStmt *switchStmt ) {
[7f5566b]662 output << "switch ( " ;
663 switchStmt->get_condition()->accept( *this );
664 output << " ) ";
[71f4e4f]665
[2b6c1e0]666 output << "{" << std::endl;
[6c4ff37]667 cur_indent += CodeGenerator::tabsize;
[51587aa]668
[6c4ff37]669 acceptAll( switchStmt->get_branches(), *this );
[51587aa]670
[6c4ff37]671 cur_indent -= CodeGenerator::tabsize;
[51587aa]672
[cda48b6]673 output << indent << "}";
[51587aa]674 }
675
[6c4ff37]676 void CodeGenerator::visit( CaseStmt *caseStmt ) {
[cda48b6]677 output << indent;
[eb3261f]678 if ( caseStmt->isDefault()) {
[2b6c1e0]679 output << "default";
[eb3261f]680 } else {
[2b6c1e0]681 output << "case ";
[7f5566b]682 caseStmt->get_condition()->accept( *this );
[17cd4eb]683 } // if
[6c4ff37]684 output << ":\n";
[71f4e4f]685
[51587aa]686 std::list<Statement *> sts = caseStmt->get_statements();
687
[6c4ff37]688 cur_indent += CodeGenerator::tabsize;
[51587aa]689 for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) {
[cda48b6]690 output << indent << printLabels( (*i)->get_labels() ) ;
[7f5566b]691 (*i)->accept( *this );
[6c4ff37]692 output << endl;
[51587aa]693 }
[6c4ff37]694 cur_indent -= CodeGenerator::tabsize;
[51587aa]695 }
696
[6c4ff37]697 void CodeGenerator::visit( BranchStmt *branchStmt ) {
[51587aa]698 switch ( branchStmt->get_type()) {
699 case BranchStmt::Goto:
700 if ( ! branchStmt->get_target().empty() )
[6c4ff37]701 output << "goto " << branchStmt->get_target();
[71f4e4f]702 else {
[51587aa]703 if ( branchStmt->get_computedTarget() != 0 ) {
[6c4ff37]704 output << "goto *";
[51587aa]705 branchStmt->get_computedTarget()->accept( *this );
706 } // if
707 } // if
708 break;
709 case BranchStmt::Break:
[6c4ff37]710 output << "break";
[51587aa]711 break;
712 case BranchStmt::Continue:
[6c4ff37]713 output << "continue";
[51587aa]714 break;
715 }
[2b6c1e0]716 output << ";";
[51587aa]717 }
718
719
[6c4ff37]720 void CodeGenerator::visit( ReturnStmt *returnStmt ) {
721 output << "return ";
[51587aa]722
723 // xxx -- check for null expression;
724 if ( returnStmt->get_expr() ) {
725 returnStmt->get_expr()->accept( *this );
726 } // if
[6c4ff37]727 output << ";";
[51587aa]728 }
729
[6c4ff37]730 void CodeGenerator::visit( WhileStmt *whileStmt ) {
[321a2481]731 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]732 output << "do" ;
[321a2481]733 } else {
[6c4ff37]734 output << "while (" ;
[7f5566b]735 whileStmt->get_condition()->accept( *this );
[6c4ff37]736 output << ")";
[51587aa]737 } // if
[2b6c1e0]738 output << " ";
[51587aa]739
[2b6c1e0]740 output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() );
[51587aa]741 whileStmt->get_body()->accept( *this );
742
[cda48b6]743 output << indent;
[51587aa]744
745 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]746 output << " while (" ;
[7f5566b]747 whileStmt->get_condition()->accept( *this );
[6c4ff37]748 output << ");";
[51587aa]749 } // if
750 }
751
[6c4ff37]752 void CodeGenerator::visit( ForStmt *forStmt ) {
[71f4e4f]753 // initialization is always hoisted, so don't
754 // bother doing anything with that
[145f1fc]755 output << "for (;";
[51587aa]756
[321a2481]757 if ( forStmt->get_condition() != 0 ) {
[51587aa]758 forStmt->get_condition()->accept( *this );
[321a2481]759 }
[6c4ff37]760 output << ";";
[51587aa]761
[321a2481]762 if ( forStmt->get_increment() != 0 ) {
763 // cast the top-level expression to void to reduce gcc warnings.
764 Expression * expr = new CastExpr( forStmt->get_increment() );
765 expr->accept( *this );
766 }
[2b6c1e0]767 output << ") ";
[51587aa]768
769 if ( forStmt->get_body() != 0 ) {
[2b6c1e0]770 output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() );
[51587aa]771 forStmt->get_body()->accept( *this );
772 } // if
773 }
774
[6c4ff37]775 void CodeGenerator::visit( NullStmt *nullStmt ) {
[cda48b6]776 //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() );
[6c4ff37]777 output << "/* null statement */ ;";
[51587aa]778 }
779
[6c4ff37]780 void CodeGenerator::visit( DeclStmt *declStmt ) {
[51587aa]781 declStmt->get_decl()->accept( *this );
[71f4e4f]782
[51587aa]783 if ( doSemicolon( declStmt->get_decl() ) ) {
[6c4ff37]784 output << ";";
[51587aa]785 } // if
786 }
787
[6c4ff37]788 std::string CodeGenerator::printLabels( std::list< Label > &l ) {
[51587aa]789 std::string str( "" );
[6c4ff37]790 l.unique(); // assumes a sorted list. Why not use set?
[51587aa]791
792 for ( std::list< Label >::iterator i = l.begin(); i != l.end(); i++ )
793 str += *i + ": ";
794
795 return str;
796 }
797
[6c4ff37]798 void CodeGenerator::handleStorageClass( Declaration *decl ) {
[51587aa]799 switch ( decl->get_storageClass() ) {
[68cd1ce]800 case DeclarationNode::Extern:
[6c4ff37]801 output << "extern ";
[51587aa]802 break;
[68cd1ce]803 case DeclarationNode::Static:
[6c4ff37]804 output << "static ";
[51587aa]805 break;
[68cd1ce]806 case DeclarationNode::Auto:
[51587aa]807 // silently drop storage class
808 break;
[68cd1ce]809 case DeclarationNode::Register:
[6c4ff37]810 output << "register ";
[51587aa]811 break;
[68cd1ce]812 case DeclarationNode::Inline:
[de62360d]813 output << "inline ";
[f38c8d9]814 break;
[68cd1ce]815 case DeclarationNode::Fortran:
816 output << "fortran ";
817 break;
818 case DeclarationNode::Noreturn:
819 output << "_Noreturn ";
820 break;
821 case DeclarationNode::Threadlocal:
822 output << "_Thread_local ";
823 break;
824 case DeclarationNode::NoStorageClass:
[f38c8d9]825 break;
[843054c2]826 } // switch
[51587aa]827 }
[51b73452]828} // namespace CodeGen
[51587aa]829
830// Local Variables: //
831// tab-width: 4 //
832// mode: c++ //
833// compile-command: "make install" //
834// End: //
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