source: src/CodeGen/CodeGenerator.cc@ aaf1f4d

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 aaf1f4d was 4b2589a, checked in by Rob Schluntz <rschlunt@…>, 9 years ago

clean up comments, remove dead code
  • Property mode set to 100644
File size: 24.1 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
[e04ef3a]11// Last Modified By : Peter A. Buhr
12// Last Modified On : Thu Jun 9 13:21:00 2016
13// Update Count : 256
[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
[888cbe4]50 ostream & CodeGenerator::Indenter::operator()( ostream & output ) const {
[cda48b6]51 return output << string( cg.cur_indent, ' ' );
52 }
53
[888cbe4]54 ostream & operator<<( ostream & output, const CodeGenerator::Indenter &indent ) {
[cda48b6]55 return indent( output );
56 }
[51587aa]57
[888cbe4]58 CodeGenerator::LabelPrinter & CodeGenerator::LabelPrinter::operator()( std::list< Label > & l ) {
59 labels = &l;
60 return *this;
61 }
62
63 ostream & operator<<( ostream & output, CodeGenerator::LabelPrinter &printLabels ) {
64 std::list< Label > & labs = *printLabels.labels;
65 // l.unique(); // assumes a sorted list. Why not use set? Does order matter?
66 for ( Label & l : labs ) {
67 output << l.get_name() + ": ";
68 printLabels.cg.genAttributes( l.get_attributes() );
69 }
70 return output;
71 }
72
73 CodeGenerator::CodeGenerator( std::ostream &os ) : indent( *this), cur_indent( 0 ), insideFunction( false ), output( os ), printLabels( *this ) { }
[cda48b6]74
75 CodeGenerator::CodeGenerator( std::ostream &os, std::string init, int indentation, bool infunp )
[888cbe4]76 : indent( *this), cur_indent( indentation ), insideFunction( infunp ), output( os ), printLabels( *this ) {
[6c4ff37]77 //output << std::string( init );
[51587aa]78 }
79
[cda48b6]80 CodeGenerator::CodeGenerator( std::ostream &os, char *init, int indentation, bool infunp )
[888cbe4]81 : indent( *this ), cur_indent( indentation ), insideFunction( infunp ), output( os ), printLabels( *this ) {
[6c4ff37]82 //output << std::string( init );
[51587aa]83 }
84
85 string mangleName( DeclarationWithType *decl ) {
86 if ( decl->get_mangleName() != "" ) {
[f326f99]87 // need to incorporate scope level in order to differentiate names for destructors
88 return decl->get_scopedMangleName();
[51587aa]89 } else {
90 return decl->get_name();
91 } // if
92 }
[94b4364]93
[7baed7d]94 void CodeGenerator::genAttributes( std::list< Attribute * > & attributes ) {
95 if ( ! attributes.empty() ) {
96 output << "__attribute__ ((";
97 for ( Attribute *& attr : attributes ) {
98 if ( ! attr->empty() ) {
99 output << attr->get_name() << "(";
100 genCommaList( attr->get_parameters().begin(), attr->get_parameters().end() );
101 output << ")";
[03e5d14]102 }
[7baed7d]103 output << ",";
104 }
105 output << ")) ";
[4e24610]106 }
[7baed7d]107 }
108
109
110 //*** Declarations
111 void CodeGenerator::visit( FunctionDecl *functionDecl ) {
112 genAttributes( functionDecl->get_attributes() );
113
[51587aa]114 handleStorageClass( functionDecl );
[f38c8d9]115 if ( functionDecl->get_isInline() ) {
[6c4ff37]116 output << "inline ";
[f38c8d9]117 } // if
[de62360d]118 if ( functionDecl->get_isNoreturn() ) {
119 output << "_Noreturn ";
120 } // if
[6c4ff37]121 output << genType( functionDecl->get_functionType(), mangleName( functionDecl ) );
[51587aa]122
123 // how to get this to the Functype?
124 std::list< Declaration * > olds = functionDecl->get_oldDecls();
125 if ( ! olds.empty() ) {
[6c4ff37]126 output << " /* function has old declaration */";
[51587aa]127 } // if
128
129 // acceptAll( functionDecl->get_oldDecls(), *this );
130 if ( functionDecl->get_statements() ) {
[7f5566b]131 functionDecl->get_statements()->accept( *this );
[51587aa]132 } // if
133 }
134
[6c4ff37]135 void CodeGenerator::visit( ObjectDecl *objectDecl ) {
[51587aa]136 handleStorageClass( objectDecl );
[6c4ff37]137 output << genType( objectDecl->get_type(), mangleName( objectDecl ) );
[71f4e4f]138
[51587aa]139 if ( objectDecl->get_init() ) {
[6c4ff37]140 output << " = ";
[51587aa]141 objectDecl->get_init()->accept( *this );
142 } // if
143 if ( objectDecl->get_bitfieldWidth() ) {
[6c4ff37]144 output << ":";
[51587aa]145 objectDecl->get_bitfieldWidth()->accept( *this );
146 } // if
147 }
148
[6c4ff37]149 void CodeGenerator::handleAggregate( AggregateDecl *aggDecl ) {
[51587aa]150 if ( aggDecl->get_name() != "" )
[6c4ff37]151 output << aggDecl->get_name();
[71f4e4f]152
[51587aa]153 std::list< Declaration * > &memb = aggDecl->get_members();
154
155 if ( ! memb.empty() ) {
[94b4364]156 output << " {" << endl;
[51587aa]157
[71f4e4f]158 cur_indent += CodeGenerator::tabsize;
[51587aa]159 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) {
[71f4e4f]160 output << indent;
[7f5566b]161 (*i)->accept( *this );
[6c4ff37]162 output << ";" << endl;
[51587aa]163 }
164
[71f4e4f]165 cur_indent -= CodeGenerator::tabsize;
[51587aa]166
[cda48b6]167 output << indent << "}";
[17cd4eb]168 } // if
[51587aa]169 }
[17cd4eb]170
[6c4ff37]171 void CodeGenerator::visit( StructDecl *structDecl ) {
172 output << "struct ";
[51587aa]173 handleAggregate( structDecl );
174 }
[17cd4eb]175
[6c4ff37]176 void CodeGenerator::visit( UnionDecl *aggregateDecl ) {
177 output << "union ";
[51587aa]178 handleAggregate( aggregateDecl );
179 }
[71f4e4f]180
[6c4ff37]181 void CodeGenerator::visit( EnumDecl *aggDecl ) {
182 output << "enum ";
[51587aa]183
184 if ( aggDecl->get_name() != "" )
[6c4ff37]185 output << aggDecl->get_name();
[71f4e4f]186
[51587aa]187 std::list< Declaration* > &memb = aggDecl->get_members();
188
189 if ( ! memb.empty() ) {
[cda48b6]190 output << " {" << endl;
[51587aa]191
[71f4e4f]192 cur_indent += CodeGenerator::tabsize;
[51587aa]193 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) {
194 ObjectDecl *obj = dynamic_cast< ObjectDecl* >( *i );
195 assert( obj );
[71f4e4f]196 output << indent << mangleName( obj );
[51587aa]197 if ( obj->get_init() ) {
[6c4ff37]198 output << " = ";
[7f5566b]199 obj->get_init()->accept( *this );
[51587aa]200 } // if
[6c4ff37]201 output << "," << endl;
[51587aa]202 } // for
203
[71f4e4f]204 cur_indent -= CodeGenerator::tabsize;
[51587aa]205
[cda48b6]206 output << indent << "}";
[51587aa]207 } // if
208 }
[71f4e4f]209
[4040425]210 void CodeGenerator::visit( TraitDecl *aggregateDecl ) {}
[71f4e4f]211
[6c4ff37]212 void CodeGenerator::visit( TypedefDecl *typeDecl ) {
213 output << "typedef ";
214 output << genType( typeDecl->get_base(), typeDecl->get_name() );
[51587aa]215 }
[71f4e4f]216
[6c4ff37]217 void CodeGenerator::visit( TypeDecl *typeDecl ) {
[51587aa]218 // really, we should mutate this into something that isn't a TypeDecl but that requires large-scale changes,
219 // still to be done
[6c4ff37]220 output << "extern unsigned long " << typeDecl->get_name();
[51587aa]221 if ( typeDecl->get_base() ) {
[6c4ff37]222 output << " = sizeof( " << genType( typeDecl->get_base(), "" ) << " )";
[51587aa]223 } // if
224 }
225
[e45215c]226 void CodeGenerator::printDesignators( std::list< Expression * > & designators ) {
227 typedef std::list< Expression * > DesignatorList;
228 if ( designators.size() == 0 ) return;
229 for ( DesignatorList::iterator iter = designators.begin(); iter != designators.end(); ++iter ) {
[8a4da06]230 if ( dynamic_cast< NameExpr * >( *iter ) ) {
[f32c7f4]231 // if expression is a name, then initializing aggregate member
232 output << ".";
233 (*iter)->accept( *this );
234 } else {
235 // if not a simple name, it has to be a constant expression, i.e. an array designator
[e45215c]236 output << "[";
237 (*iter)->accept( *this );
238 output << "]";
239 }
240 }
241 output << " = ";
242 }
243
[6c4ff37]244 void CodeGenerator::visit( SingleInit *init ) {
[e45215c]245 printDesignators( init->get_designators() );
[51587aa]246 init->get_value()->accept( *this );
247 }
248
[6c4ff37]249 void CodeGenerator::visit( ListInit *init ) {
[e45215c]250 printDesignators( init->get_designators() );
[6c4ff37]251 output << "{ ";
[5b40f30]252 if ( init->begin_initializers() == init->end_initializers() ) {
253 // illegal to leave initializer list empty for scalar initializers,
254 // but always legal to have 0
255 output << "0";
256 } else {
257 genCommaList( init->begin_initializers(), init->end_initializers() );
258 }
[6c4ff37]259 output << " }";
[51587aa]260 }
261
[71f4e4f]262 void CodeGenerator::visit( Constant *constant ) {
[6c4ff37]263 output << constant->get_value() ;
[51587aa]264 }
265
266 //*** Expressions
[6c4ff37]267 void CodeGenerator::visit( ApplicationExpr *applicationExpr ) {
[e04ef3a]268 extension( applicationExpr );
[51587aa]269 if ( VariableExpr *varExpr = dynamic_cast< VariableExpr* >( applicationExpr->get_function() ) ) {
270 OperatorInfo opInfo;
271 if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( varExpr->get_var()->get_name(), opInfo ) ) {
272 std::list< Expression* >::iterator arg = applicationExpr->get_args().begin();
273 switch ( opInfo.type ) {
274 case OT_PREFIXASSIGN:
275 case OT_POSTFIXASSIGN:
276 case OT_INFIXASSIGN:
[356189a]277 case OT_CTOR:
[c2ce2350]278 case OT_DTOR:
[51587aa]279 {
280 assert( arg != applicationExpr->get_args().end() );
281 if ( AddressExpr *addrExpr = dynamic_cast< AddressExpr * >( *arg ) ) {
[356189a]282 // remove & from first assignment/ctor argument
[51587aa]283 *arg = addrExpr->get_arg();
284 } else {
[356189a]285 // no address-of operator, so must be a pointer - add dereference
[51587aa]286 UntypedExpr *newExpr = new UntypedExpr( new NameExpr( "*?" ) );
287 newExpr->get_args().push_back( *arg );
[10a7775]288 assert( (*arg)->get_results().size() == 1 );
289 Type * type = InitTweak::getPointerBase( (*arg)->get_results().front() );
290 assert( type );
291 newExpr->get_results().push_back( type );
[51587aa]292 *arg = newExpr;
293 } // if
294 break;
295 }
[71f4e4f]296
[51587aa]297 default:
298 // do nothing
299 ;
300 }
[71f4e4f]301
[51587aa]302 switch ( opInfo.type ) {
303 case OT_INDEX:
304 assert( applicationExpr->get_args().size() == 2 );
305 (*arg++)->accept( *this );
[6c4ff37]306 output << "[";
[51587aa]307 (*arg)->accept( *this );
[6c4ff37]308 output << "]";
[51587aa]309 break;
[71f4e4f]310
[51587aa]311 case OT_CALL:
[356189a]312 // there are no intrinsic definitions of the function call operator
[51587aa]313 assert( false );
314 break;
[71f4e4f]315
[f1e012b]316 case OT_CTOR:
[c2ce2350]317 case OT_DTOR:
[356189a]318 if ( applicationExpr->get_args().size() == 1 ) {
[c2ce2350]319 // the expression fed into a single parameter constructor or destructor
[64071c2]320 // may contain side effects, so must still output this expression
321 output << "(";
[356189a]322 (*arg++)->accept( *this );
[64071c2]323 output << ") /* " << opInfo.inputName << " */";
[356189a]324 } else if ( applicationExpr->get_args().size() == 2 ) {
[c2ce2350]325 // intrinsic two parameter constructors are essentially bitwise assignment
[356189a]326 output << "(";
327 (*arg++)->accept( *this );
328 output << opInfo.symbol;
329 (*arg)->accept( *this );
[c2ce2350]330 output << ") /* " << opInfo.inputName << " */";
[356189a]331 } else {
[c2ce2350]332 // no constructors with 0 or more than 2 parameters
[356189a]333 assert( false );
334 }
335 break;
[f1e012b]336
[51587aa]337 case OT_PREFIX:
338 case OT_PREFIXASSIGN:
339 assert( applicationExpr->get_args().size() == 1 );
[6c4ff37]340 output << "(";
341 output << opInfo.symbol;
[51587aa]342 (*arg)->accept( *this );
[6c4ff37]343 output << ")";
[51587aa]344 break;
[71f4e4f]345
[51587aa]346 case OT_POSTFIX:
347 case OT_POSTFIXASSIGN:
348 assert( applicationExpr->get_args().size() == 1 );
349 (*arg)->accept( *this );
[6c4ff37]350 output << opInfo.symbol;
[51587aa]351 break;
352
[f1e012b]353
[51587aa]354 case OT_INFIX:
355 case OT_INFIXASSIGN:
356 assert( applicationExpr->get_args().size() == 2 );
[6c4ff37]357 output << "(";
[51587aa]358 (*arg++)->accept( *this );
[6c4ff37]359 output << opInfo.symbol;
[51587aa]360 (*arg)->accept( *this );
[6c4ff37]361 output << ")";
[51587aa]362 break;
[71f4e4f]363
[51587aa]364 case OT_CONSTANT:
[721f17a]365 case OT_LABELADDRESS:
366 // there are no intrinsic definitions of 0/1 or label addresses as functions
[51587aa]367 assert( false );
368 }
[17cd4eb]369 } else {
[51587aa]370 varExpr->accept( *this );
[6c4ff37]371 output << "(";
[51587aa]372 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]373 output << ")";
[17cd4eb]374 } // if
[51587aa]375 } else {
376 applicationExpr->get_function()->accept( *this );
[6c4ff37]377 output << "(";
[51587aa]378 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]379 output << ")";
[51587aa]380 } // if
381 }
[71f4e4f]382
[6c4ff37]383 void CodeGenerator::visit( UntypedExpr *untypedExpr ) {
[e04ef3a]384 extension( untypedExpr );
[51587aa]385 if ( NameExpr *nameExpr = dynamic_cast< NameExpr* >( untypedExpr->get_function() ) ) {
386 OperatorInfo opInfo;
387 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
388 std::list< Expression* >::iterator arg = untypedExpr->get_args().begin();
389 switch ( opInfo.type ) {
390 case OT_INDEX:
391 assert( untypedExpr->get_args().size() == 2 );
392 (*arg++)->accept( *this );
[6c4ff37]393 output << "[";
[51587aa]394 (*arg)->accept( *this );
[6c4ff37]395 output << "]";
[51587aa]396 break;
[71f4e4f]397
[51587aa]398 case OT_CALL:
[f1e012b]399 assert( false );
400
[c2ce2350]401
402 case OT_CTOR:
403 case OT_DTOR:
404 if ( untypedExpr->get_args().size() == 1 ) {
405 // the expression fed into a single parameter constructor or destructor
[64071c2]406 // may contain side effects, so must still output this expression
407 output << "(";
[c2ce2350]408 (*arg++)->accept( *this );
[64071c2]409 output << ") /* " << opInfo.inputName << " */";
[c2ce2350]410 } else if ( untypedExpr->get_args().size() == 2 ) {
411 // intrinsic two parameter constructors are essentially bitwise assignment
412 output << "(";
413 (*arg++)->accept( *this );
414 output << opInfo.symbol;
415 (*arg)->accept( *this );
416 output << ") /* " << opInfo.inputName << " */";
417 } else {
418 // no constructors with 0 or more than 2 parameters
419 assert( false );
420 }
[51587aa]421 break;
[71f4e4f]422
[51587aa]423 case OT_PREFIX:
424 case OT_PREFIXASSIGN:
[de62360d]425 case OT_LABELADDRESS:
[51587aa]426 assert( untypedExpr->get_args().size() == 1 );
[6c4ff37]427 output << "(";
428 output << opInfo.symbol;
[51587aa]429 (*arg)->accept( *this );
[6c4ff37]430 output << ")";
[51587aa]431 break;
[71f4e4f]432
[51587aa]433 case OT_POSTFIX:
434 case OT_POSTFIXASSIGN:
435 assert( untypedExpr->get_args().size() == 1 );
436 (*arg)->accept( *this );
[6c4ff37]437 output << opInfo.symbol;
[51587aa]438 break;
[71f4e4f]439
[51587aa]440 case OT_INFIX:
441 case OT_INFIXASSIGN:
442 assert( untypedExpr->get_args().size() == 2 );
[6c4ff37]443 output << "(";
[51587aa]444 (*arg++)->accept( *this );
[6c4ff37]445 output << opInfo.symbol;
[51587aa]446 (*arg)->accept( *this );
[6c4ff37]447 output << ")";
[51587aa]448 break;
[71f4e4f]449
[51587aa]450 case OT_CONSTANT:
451 // there are no intrinsic definitions of 0 or 1 as functions
452 assert( false );
453 }
454 } else {
455 nameExpr->accept( *this );
[6c4ff37]456 output << "(";
[51587aa]457 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
[6c4ff37]458 output << ")";
[51587aa]459 } // if
460 } else {
461 untypedExpr->get_function()->accept( *this );
[6c4ff37]462 output << "(";
[51587aa]463 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
[6c4ff37]464 output << ")";
[51587aa]465 } // if
466 }
[71f4e4f]467
[6c4ff37]468 void CodeGenerator::visit( NameExpr *nameExpr ) {
[e04ef3a]469 extension( nameExpr );
[51587aa]470 OperatorInfo opInfo;
471 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
472 assert( opInfo.type == OT_CONSTANT );
[6c4ff37]473 output << opInfo.symbol;
[51587aa]474 } else {
[6c4ff37]475 output << nameExpr->get_name();
[51587aa]476 } // if
477 }
[71f4e4f]478
[6c4ff37]479 void CodeGenerator::visit( AddressExpr *addressExpr ) {
[e04ef3a]480 extension( addressExpr );
[6c4ff37]481 output << "(&";
[51587aa]482 // this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address
483 if ( VariableExpr *variableExpr = dynamic_cast< VariableExpr* >( addressExpr->get_arg() ) ) {
[6c4ff37]484 output << mangleName( variableExpr->get_var() );
[51587aa]485 } else {
486 addressExpr->get_arg()->accept( *this );
487 } // if
[6c4ff37]488 output << ")";
[51587aa]489 }
490
[6c4ff37]491 void CodeGenerator::visit( CastExpr *castExpr ) {
[e04ef3a]492 extension( castExpr );
[803deb1]493 output << "(";
494 if ( castExpr->get_results().empty() ) {
495 output << "(void)" ;
496 } else if ( ! castExpr->get_results().front()->get_isLvalue() ) {
497 // at least one result type of cast, but not an lvalue
498 output << "(";
499 output << genType( castExpr->get_results().front(), "" );
[71f4e4f]500 output << ")";
[803deb1]501 } else {
502 // otherwise, the cast is to an lvalue type, so the cast
503 // should be dropped, since the result of a cast is
504 // never an lvalue in C
[76b48f1]505 }
[803deb1]506 castExpr->get_arg()->accept( *this );
507 output << ")";
[51587aa]508 }
[71f4e4f]509
[6c4ff37]510 void CodeGenerator::visit( UntypedMemberExpr *memberExpr ) {
[51587aa]511 assert( false );
512 }
[71f4e4f]513
[6c4ff37]514 void CodeGenerator::visit( MemberExpr *memberExpr ) {
[e04ef3a]515 extension( memberExpr );
[51587aa]516 memberExpr->get_aggregate()->accept( *this );
[6c4ff37]517 output << "." << mangleName( memberExpr->get_member() );
[51587aa]518 }
[71f4e4f]519
[6c4ff37]520 void CodeGenerator::visit( VariableExpr *variableExpr ) {
[e04ef3a]521 extension( variableExpr );
[51587aa]522 OperatorInfo opInfo;
523 if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) {
[6c4ff37]524 output << opInfo.symbol;
[51587aa]525 } else {
[6c4ff37]526 output << mangleName( variableExpr->get_var() );
[51587aa]527 } // if
528 }
[71f4e4f]529
[6c4ff37]530 void CodeGenerator::visit( ConstantExpr *constantExpr ) {
[51587aa]531 assert( constantExpr->get_constant() );
[e04ef3a]532 extension( constantExpr );
[51587aa]533 constantExpr->get_constant()->accept( *this );
534 }
[71f4e4f]535
[6c4ff37]536 void CodeGenerator::visit( SizeofExpr *sizeofExpr ) {
[e04ef3a]537 extension( sizeofExpr );
[6c4ff37]538 output << "sizeof(";
[51587aa]539 if ( sizeofExpr->get_isType() ) {
[6c4ff37]540 output << genType( sizeofExpr->get_type(), "" );
[51587aa]541 } else {
542 sizeofExpr->get_expr()->accept( *this );
543 } // if
[6c4ff37]544 output << ")";
[51587aa]545 }
[47534159]546
[25a054f]547 void CodeGenerator::visit( AlignofExpr *alignofExpr ) {
[e04ef3a]548 extension( alignofExpr );
[47534159]549 // use GCC extension to avoid bumping std to C11
550 output << "__alignof__(";
[25a054f]551 if ( alignofExpr->get_isType() ) {
552 output << genType( alignofExpr->get_type(), "" );
[47534159]553 } else {
[25a054f]554 alignofExpr->get_expr()->accept( *this );
[47534159]555 } // if
556 output << ")";
557 }
[71f4e4f]558
[2a4b088]559 void CodeGenerator::visit( UntypedOffsetofExpr *offsetofExpr ) {
[afc1045]560 assert( false && "UntypedOffsetofExpr should not reach code generation" );
[2a4b088]561 }
562
[25a054f]563 void CodeGenerator::visit( OffsetofExpr *offsetofExpr ) {
[e04ef3a]564 extension( offsetofExpr );
[25a054f]565 // use GCC builtin
566 output << "__builtin_offsetof(";
567 output << genType( offsetofExpr->get_type(), "" );
[e551c69]568 output << ", " << mangleName( offsetofExpr->get_member() );
[25a054f]569 output << ")";
570 }
[d63eeb0]571
[afc1045]572 void CodeGenerator::visit( OffsetPackExpr *offsetPackExpr ) {
573 assert( false && "OffsetPackExpr should not reach code generation" );
574 }
[70a06f6]575
[6c4ff37]576 void CodeGenerator::visit( LogicalExpr *logicalExpr ) {
[e04ef3a]577 extension( logicalExpr );
[6c4ff37]578 output << "(";
[51587aa]579 logicalExpr->get_arg1()->accept( *this );
580 if ( logicalExpr->get_isAnd() ) {
[6c4ff37]581 output << " && ";
[51587aa]582 } else {
[6c4ff37]583 output << " || ";
[51587aa]584 } // if
585 logicalExpr->get_arg2()->accept( *this );
[6c4ff37]586 output << ")";
[51587aa]587 }
[71f4e4f]588
[6c4ff37]589 void CodeGenerator::visit( ConditionalExpr *conditionalExpr ) {
[e04ef3a]590 extension( conditionalExpr );
[6c4ff37]591 output << "(";
[51587aa]592 conditionalExpr->get_arg1()->accept( *this );
[6c4ff37]593 output << " ? ";
[51587aa]594 conditionalExpr->get_arg2()->accept( *this );
[6c4ff37]595 output << " : ";
[51587aa]596 conditionalExpr->get_arg3()->accept( *this );
[6c4ff37]597 output << ")";
[51587aa]598 }
[71f4e4f]599
[6c4ff37]600 void CodeGenerator::visit( CommaExpr *commaExpr ) {
[e04ef3a]601 extension( commaExpr );
[6c4ff37]602 output << "(";
[51587aa]603 commaExpr->get_arg1()->accept( *this );
[6c4ff37]604 output << " , ";
[51587aa]605 commaExpr->get_arg2()->accept( *this );
[6c4ff37]606 output << ")";
[51587aa]607 }
[71f4e4f]608
[6c4ff37]609 void CodeGenerator::visit( TupleExpr *tupleExpr ) {}
[71f4e4f]610
[6c4ff37]611 void CodeGenerator::visit( TypeExpr *typeExpr ) {}
[2b6c1e0]612
[7f5566b]613 void CodeGenerator::visit( AsmExpr *asmExpr ) {
[e04ef3a]614 extension( asmExpr );
[7f5566b]615 if ( asmExpr->get_inout() ) {
616 output << "[ ";
617 asmExpr->get_inout()->accept( *this );
618 output << " ] ";
619 } // if
620 asmExpr->get_constraint()->accept( *this );
621 output << " ( ";
622 asmExpr->get_operand()->accept( *this );
623 output << " )";
624 }
625
[51587aa]626 //*** Statements
[6c4ff37]627 void CodeGenerator::visit( CompoundStmt *compoundStmt ) {
[51587aa]628 std::list<Statement*> ks = compoundStmt->get_kids();
[2b6c1e0]629 output << "{" << endl;
[51587aa]630
[2b6c1e0]631 cur_indent += CodeGenerator::tabsize;
[51587aa]632
[7f5566b]633 for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) {
[cda48b6]634 output << indent << printLabels( (*i)->get_labels() );
[7f5566b]635 (*i)->accept( *this );
[2b6c1e0]636
[6c4ff37]637 output << endl;
[2b6c1e0]638 if ( wantSpacing( *i ) ) {
639 output << endl;
640 }
[51587aa]641 }
[71f4e4f]642 cur_indent -= CodeGenerator::tabsize;
[51587aa]643
[cda48b6]644 output << indent << "}";
[51587aa]645 }
646
[6c4ff37]647 void CodeGenerator::visit( ExprStmt *exprStmt ) {
648 assert( exprStmt );
[321a2481]649 // cast the top-level expression to void to reduce gcc warnings.
650 Expression * expr = new CastExpr( exprStmt->get_expr() );
651 expr->accept( *this );
652 output << ";";
[51587aa]653 }
654
[7f5566b]655 void CodeGenerator::visit( AsmStmt *asmStmt ) {
656 output << "asm ";
657 if ( asmStmt->get_voltile() ) output << "volatile ";
658 if ( ! asmStmt->get_gotolabels().empty() ) output << "goto ";
659 output << "( ";
660 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
661 output << " : ";
662 genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() );
663 output << " : ";
664 genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() );
665 output << " : ";
666 genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() );
667 if ( ! asmStmt->get_gotolabels().empty() ) {
668 output << " : ";
669 for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) {
670 output << *begin++;
671 if ( begin == asmStmt->get_gotolabels().end() ) break;
672 output << ", ";
673 } // for
674 } // if
675 output << " );" ;
676 }
677
[6c4ff37]678 void CodeGenerator::visit( IfStmt *ifStmt ) {
[7f5566b]679 output << "if ( ";
680 ifStmt->get_condition()->accept( *this );
681 output << " ) ";
[51587aa]682
[7f5566b]683 ifStmt->get_thenPart()->accept( *this );
[51587aa]684
685 if ( ifStmt->get_elsePart() != 0) {
[2b6c1e0]686 output << " else ";
[7f5566b]687 ifStmt->get_elsePart()->accept( *this );
[51587aa]688 } // if
689 }
690
[6c4ff37]691 void CodeGenerator::visit( SwitchStmt *switchStmt ) {
[7f5566b]692 output << "switch ( " ;
693 switchStmt->get_condition()->accept( *this );
694 output << " ) ";
[71f4e4f]695
[2b6c1e0]696 output << "{" << std::endl;
[6c4ff37]697 cur_indent += CodeGenerator::tabsize;
[51587aa]698
[6c4ff37]699 acceptAll( switchStmt->get_branches(), *this );
[51587aa]700
[6c4ff37]701 cur_indent -= CodeGenerator::tabsize;
[51587aa]702
[cda48b6]703 output << indent << "}";
[51587aa]704 }
705
[6c4ff37]706 void CodeGenerator::visit( CaseStmt *caseStmt ) {
[cda48b6]707 output << indent;
[eb3261f]708 if ( caseStmt->isDefault()) {
[2b6c1e0]709 output << "default";
[eb3261f]710 } else {
[2b6c1e0]711 output << "case ";
[7f5566b]712 caseStmt->get_condition()->accept( *this );
[17cd4eb]713 } // if
[6c4ff37]714 output << ":\n";
[71f4e4f]715
[51587aa]716 std::list<Statement *> sts = caseStmt->get_statements();
717
[6c4ff37]718 cur_indent += CodeGenerator::tabsize;
[51587aa]719 for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) {
[cda48b6]720 output << indent << printLabels( (*i)->get_labels() ) ;
[7f5566b]721 (*i)->accept( *this );
[6c4ff37]722 output << endl;
[51587aa]723 }
[6c4ff37]724 cur_indent -= CodeGenerator::tabsize;
[51587aa]725 }
726
[6c4ff37]727 void CodeGenerator::visit( BranchStmt *branchStmt ) {
[51587aa]728 switch ( branchStmt->get_type()) {
729 case BranchStmt::Goto:
730 if ( ! branchStmt->get_target().empty() )
[6c4ff37]731 output << "goto " << branchStmt->get_target();
[71f4e4f]732 else {
[51587aa]733 if ( branchStmt->get_computedTarget() != 0 ) {
[6c4ff37]734 output << "goto *";
[51587aa]735 branchStmt->get_computedTarget()->accept( *this );
736 } // if
737 } // if
738 break;
739 case BranchStmt::Break:
[6c4ff37]740 output << "break";
[51587aa]741 break;
742 case BranchStmt::Continue:
[6c4ff37]743 output << "continue";
[51587aa]744 break;
745 }
[2b6c1e0]746 output << ";";
[51587aa]747 }
748
749
[6c4ff37]750 void CodeGenerator::visit( ReturnStmt *returnStmt ) {
751 output << "return ";
[4b2589a]752 maybeAccept( returnStmt->get_expr(), *this );
[6c4ff37]753 output << ";";
[51587aa]754 }
755
[6c4ff37]756 void CodeGenerator::visit( WhileStmt *whileStmt ) {
[321a2481]757 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]758 output << "do" ;
[321a2481]759 } else {
[6c4ff37]760 output << "while (" ;
[7f5566b]761 whileStmt->get_condition()->accept( *this );
[6c4ff37]762 output << ")";
[51587aa]763 } // if
[2b6c1e0]764 output << " ";
[51587aa]765
[2b6c1e0]766 output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() );
[51587aa]767 whileStmt->get_body()->accept( *this );
768
[cda48b6]769 output << indent;
[51587aa]770
771 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]772 output << " while (" ;
[7f5566b]773 whileStmt->get_condition()->accept( *this );
[6c4ff37]774 output << ");";
[51587aa]775 } // if
776 }
777
[6c4ff37]778 void CodeGenerator::visit( ForStmt *forStmt ) {
[71f4e4f]779 // initialization is always hoisted, so don't
780 // bother doing anything with that
[145f1fc]781 output << "for (;";
[51587aa]782
[321a2481]783 if ( forStmt->get_condition() != 0 ) {
[51587aa]784 forStmt->get_condition()->accept( *this );
[321a2481]785 }
[6c4ff37]786 output << ";";
[51587aa]787
[321a2481]788 if ( forStmt->get_increment() != 0 ) {
789 // cast the top-level expression to void to reduce gcc warnings.
790 Expression * expr = new CastExpr( forStmt->get_increment() );
791 expr->accept( *this );
792 }
[2b6c1e0]793 output << ") ";
[51587aa]794
795 if ( forStmt->get_body() != 0 ) {
[2b6c1e0]796 output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() );
[51587aa]797 forStmt->get_body()->accept( *this );
798 } // if
799 }
800
[6c4ff37]801 void CodeGenerator::visit( NullStmt *nullStmt ) {
[cda48b6]802 //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() );
[6c4ff37]803 output << "/* null statement */ ;";
[51587aa]804 }
805
[6c4ff37]806 void CodeGenerator::visit( DeclStmt *declStmt ) {
[51587aa]807 declStmt->get_decl()->accept( *this );
[71f4e4f]808
[51587aa]809 if ( doSemicolon( declStmt->get_decl() ) ) {
[6c4ff37]810 output << ";";
[51587aa]811 } // if
812 }
813
[6c4ff37]814 void CodeGenerator::handleStorageClass( Declaration *decl ) {
[51587aa]815 switch ( decl->get_storageClass() ) {
[68cd1ce]816 case DeclarationNode::Extern:
[6c4ff37]817 output << "extern ";
[51587aa]818 break;
[68cd1ce]819 case DeclarationNode::Static:
[6c4ff37]820 output << "static ";
[51587aa]821 break;
[68cd1ce]822 case DeclarationNode::Auto:
[51587aa]823 // silently drop storage class
824 break;
[68cd1ce]825 case DeclarationNode::Register:
[6c4ff37]826 output << "register ";
[51587aa]827 break;
[68cd1ce]828 case DeclarationNode::Inline:
[de62360d]829 output << "inline ";
[f38c8d9]830 break;
[68cd1ce]831 case DeclarationNode::Fortran:
832 output << "fortran ";
833 break;
834 case DeclarationNode::Noreturn:
835 output << "_Noreturn ";
836 break;
837 case DeclarationNode::Threadlocal:
838 output << "_Thread_local ";
839 break;
840 case DeclarationNode::NoStorageClass:
[f38c8d9]841 break;
[843054c2]842 } // switch
[51587aa]843 }
[51b73452]844} // namespace CodeGen
[51587aa]845
846// Local Variables: //
847// tab-width: 4 //
848// mode: c++ //
849// compile-command: "make install" //
850// End: //
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