source: src/CodeGen/CodeGenerator.cc@ 3f869f0

ADT aaron-thesis arm-eh ast-experimental cleanup-dtors ctor deferred_resn demangler enum forall-pointer-decay 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 3f869f0 was 8e9cbb2, checked in by Peter A. Buhr <pabuhr@…>, 9 years ago

add more code to handle gcc extension and test program, second attempt
  • Property mode set to 100644
File size: 24.5 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
[e04ef3a]11// Last Modified By : Peter A. Buhr
[8e9cbb2]12// Last Modified On : Mon Jul 4 20:38:32 2016
13// Update Count : 300
[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
[8e9cbb2]50 void CodeGenerator::extension( Expression *expr ) {
51 if ( expr->get_extension() ) {
52 output << "__extension__ ";
53 } // if
54 } // extension
55
56 void CodeGenerator::extension( Declaration *decl ) {
57 if ( decl->get_extension() ) {
58 output << "__extension__ ";
59 } // if
60 } // extension
61
[888cbe4]62 ostream & CodeGenerator::Indenter::operator()( ostream & output ) const {
[cda48b6]63 return output << string( cg.cur_indent, ' ' );
64 }
65
[888cbe4]66 ostream & operator<<( ostream & output, const CodeGenerator::Indenter &indent ) {
[cda48b6]67 return indent( output );
68 }
[51587aa]69
[888cbe4]70 CodeGenerator::LabelPrinter & CodeGenerator::LabelPrinter::operator()( std::list< Label > & l ) {
71 labels = &l;
72 return *this;
73 }
74
75 ostream & operator<<( ostream & output, CodeGenerator::LabelPrinter &printLabels ) {
76 std::list< Label > & labs = *printLabels.labels;
77 // l.unique(); // assumes a sorted list. Why not use set? Does order matter?
78 for ( Label & l : labs ) {
79 output << l.get_name() + ": ";
80 printLabels.cg.genAttributes( l.get_attributes() );
81 }
82 return output;
83 }
84
85 CodeGenerator::CodeGenerator( std::ostream &os ) : indent( *this), cur_indent( 0 ), insideFunction( false ), output( os ), printLabels( *this ) { }
[cda48b6]86
87 CodeGenerator::CodeGenerator( std::ostream &os, std::string init, int indentation, bool infunp )
[888cbe4]88 : indent( *this), cur_indent( indentation ), insideFunction( infunp ), output( os ), printLabels( *this ) {
[6c4ff37]89 //output << std::string( init );
[51587aa]90 }
91
[cda48b6]92 CodeGenerator::CodeGenerator( std::ostream &os, char *init, int indentation, bool infunp )
[888cbe4]93 : indent( *this ), cur_indent( indentation ), insideFunction( infunp ), output( os ), printLabels( *this ) {
[6c4ff37]94 //output << std::string( init );
[51587aa]95 }
96
97 string mangleName( DeclarationWithType *decl ) {
98 if ( decl->get_mangleName() != "" ) {
[f326f99]99 // need to incorporate scope level in order to differentiate names for destructors
100 return decl->get_scopedMangleName();
[51587aa]101 } else {
102 return decl->get_name();
103 } // if
104 }
[94b4364]105
[7baed7d]106 void CodeGenerator::genAttributes( std::list< Attribute * > & attributes ) {
107 if ( ! attributes.empty() ) {
108 output << "__attribute__ ((";
109 for ( Attribute *& attr : attributes ) {
110 if ( ! attr->empty() ) {
111 output << attr->get_name() << "(";
112 genCommaList( attr->get_parameters().begin(), attr->get_parameters().end() );
113 output << ")";
[03e5d14]114 }
[7baed7d]115 output << ",";
116 }
117 output << ")) ";
[4e24610]118 }
[7baed7d]119 }
120
121
122 //*** Declarations
123 void CodeGenerator::visit( FunctionDecl *functionDecl ) {
[8e9cbb2]124 extension( functionDecl );
[7baed7d]125 genAttributes( functionDecl->get_attributes() );
126
[51587aa]127 handleStorageClass( functionDecl );
[f38c8d9]128 if ( functionDecl->get_isInline() ) {
[6c4ff37]129 output << "inline ";
[f38c8d9]130 } // if
[de62360d]131 if ( functionDecl->get_isNoreturn() ) {
132 output << "_Noreturn ";
133 } // if
[6c4ff37]134 output << genType( functionDecl->get_functionType(), mangleName( functionDecl ) );
[51587aa]135
136 // how to get this to the Functype?
137 std::list< Declaration * > olds = functionDecl->get_oldDecls();
138 if ( ! olds.empty() ) {
[6c4ff37]139 output << " /* function has old declaration */";
[51587aa]140 } // if
141
142 // acceptAll( functionDecl->get_oldDecls(), *this );
143 if ( functionDecl->get_statements() ) {
[7f5566b]144 functionDecl->get_statements()->accept( *this );
[51587aa]145 } // if
146 }
147
[6c4ff37]148 void CodeGenerator::visit( ObjectDecl *objectDecl ) {
[8e9cbb2]149 extension( objectDecl );
[51587aa]150 handleStorageClass( objectDecl );
[6c4ff37]151 output << genType( objectDecl->get_type(), mangleName( objectDecl ) );
[71f4e4f]152
[51587aa]153 if ( objectDecl->get_init() ) {
[6c4ff37]154 output << " = ";
[51587aa]155 objectDecl->get_init()->accept( *this );
156 } // if
157 if ( objectDecl->get_bitfieldWidth() ) {
[6c4ff37]158 output << ":";
[51587aa]159 objectDecl->get_bitfieldWidth()->accept( *this );
160 } // if
161 }
162
[6c4ff37]163 void CodeGenerator::handleAggregate( AggregateDecl *aggDecl ) {
[51587aa]164 if ( aggDecl->get_name() != "" )
[6c4ff37]165 output << aggDecl->get_name();
[71f4e4f]166
[51587aa]167 std::list< Declaration * > &memb = aggDecl->get_members();
168
169 if ( ! memb.empty() ) {
[94b4364]170 output << " {" << endl;
[51587aa]171
[71f4e4f]172 cur_indent += CodeGenerator::tabsize;
[51587aa]173 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) {
[71f4e4f]174 output << indent;
[7f5566b]175 (*i)->accept( *this );
[6c4ff37]176 output << ";" << endl;
[51587aa]177 }
178
[71f4e4f]179 cur_indent -= CodeGenerator::tabsize;
[51587aa]180
[cda48b6]181 output << indent << "}";
[17cd4eb]182 } // if
[51587aa]183 }
[17cd4eb]184
[6c4ff37]185 void CodeGenerator::visit( StructDecl *structDecl ) {
[8e9cbb2]186 extension( structDecl );
[6c4ff37]187 output << "struct ";
[51587aa]188 handleAggregate( structDecl );
189 }
[17cd4eb]190
[8e9cbb2]191 void CodeGenerator::visit( UnionDecl *unionDecl ) {
192 extension( unionDecl );
[6c4ff37]193 output << "union ";
[8e9cbb2]194 handleAggregate( unionDecl );
[51587aa]195 }
[71f4e4f]196
[8e9cbb2]197 void CodeGenerator::visit( EnumDecl *enumDecl ) {
198 extension( enumDecl );
[6c4ff37]199 output << "enum ";
[51587aa]200
[8e9cbb2]201 if ( enumDecl->get_name() != "" )
202 output << enumDecl->get_name();
[71f4e4f]203
[8e9cbb2]204 std::list< Declaration* > &memb = enumDecl->get_members();
[51587aa]205
206 if ( ! memb.empty() ) {
[cda48b6]207 output << " {" << endl;
[51587aa]208
[71f4e4f]209 cur_indent += CodeGenerator::tabsize;
[51587aa]210 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) {
211 ObjectDecl *obj = dynamic_cast< ObjectDecl* >( *i );
212 assert( obj );
[71f4e4f]213 output << indent << mangleName( obj );
[51587aa]214 if ( obj->get_init() ) {
[6c4ff37]215 output << " = ";
[7f5566b]216 obj->get_init()->accept( *this );
[51587aa]217 } // if
[6c4ff37]218 output << "," << endl;
[51587aa]219 } // for
220
[71f4e4f]221 cur_indent -= CodeGenerator::tabsize;
[51587aa]222
[cda48b6]223 output << indent << "}";
[51587aa]224 } // if
225 }
[71f4e4f]226
[8e9cbb2]227 void CodeGenerator::visit( TraitDecl *traitDecl ) {}
[71f4e4f]228
[6c4ff37]229 void CodeGenerator::visit( TypedefDecl *typeDecl ) {
[8e9cbb2]230 assert( false && "Typedefs are removed and substituted in earlier passes." );
231 //output << "typedef ";
232 //output << genType( typeDecl->get_base(), typeDecl->get_name() );
[51587aa]233 }
[71f4e4f]234
[6c4ff37]235 void CodeGenerator::visit( TypeDecl *typeDecl ) {
[51587aa]236 // really, we should mutate this into something that isn't a TypeDecl but that requires large-scale changes,
237 // still to be done
[8e9cbb2]238 extension( typeDecl );
[6c4ff37]239 output << "extern unsigned long " << typeDecl->get_name();
[51587aa]240 if ( typeDecl->get_base() ) {
[6c4ff37]241 output << " = sizeof( " << genType( typeDecl->get_base(), "" ) << " )";
[51587aa]242 } // if
243 }
244
[e45215c]245 void CodeGenerator::printDesignators( std::list< Expression * > & designators ) {
246 typedef std::list< Expression * > DesignatorList;
247 if ( designators.size() == 0 ) return;
248 for ( DesignatorList::iterator iter = designators.begin(); iter != designators.end(); ++iter ) {
[8a4da06]249 if ( dynamic_cast< NameExpr * >( *iter ) ) {
[f32c7f4]250 // if expression is a name, then initializing aggregate member
251 output << ".";
252 (*iter)->accept( *this );
253 } else {
254 // if not a simple name, it has to be a constant expression, i.e. an array designator
[e45215c]255 output << "[";
256 (*iter)->accept( *this );
257 output << "]";
258 }
259 }
260 output << " = ";
261 }
262
[6c4ff37]263 void CodeGenerator::visit( SingleInit *init ) {
[e45215c]264 printDesignators( init->get_designators() );
[51587aa]265 init->get_value()->accept( *this );
266 }
267
[6c4ff37]268 void CodeGenerator::visit( ListInit *init ) {
[e45215c]269 printDesignators( init->get_designators() );
[6c4ff37]270 output << "{ ";
[5b40f30]271 if ( init->begin_initializers() == init->end_initializers() ) {
[8e9cbb2]272 // illegal to leave initializer list empty for scalar initializers, but always legal to have 0
[5b40f30]273 output << "0";
274 } else {
275 genCommaList( init->begin_initializers(), init->end_initializers() );
276 }
[6c4ff37]277 output << " }";
[51587aa]278 }
279
[71f4e4f]280 void CodeGenerator::visit( Constant *constant ) {
[6c4ff37]281 output << constant->get_value() ;
[51587aa]282 }
283
284 //*** Expressions
[6c4ff37]285 void CodeGenerator::visit( ApplicationExpr *applicationExpr ) {
[e04ef3a]286 extension( applicationExpr );
[51587aa]287 if ( VariableExpr *varExpr = dynamic_cast< VariableExpr* >( applicationExpr->get_function() ) ) {
288 OperatorInfo opInfo;
289 if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( varExpr->get_var()->get_name(), opInfo ) ) {
290 std::list< Expression* >::iterator arg = applicationExpr->get_args().begin();
291 switch ( opInfo.type ) {
292 case OT_PREFIXASSIGN:
293 case OT_POSTFIXASSIGN:
294 case OT_INFIXASSIGN:
[356189a]295 case OT_CTOR:
[c2ce2350]296 case OT_DTOR:
[51587aa]297 {
298 assert( arg != applicationExpr->get_args().end() );
299 if ( AddressExpr *addrExpr = dynamic_cast< AddressExpr * >( *arg ) ) {
[356189a]300 // remove & from first assignment/ctor argument
[51587aa]301 *arg = addrExpr->get_arg();
302 } else {
[356189a]303 // no address-of operator, so must be a pointer - add dereference
[51587aa]304 UntypedExpr *newExpr = new UntypedExpr( new NameExpr( "*?" ) );
305 newExpr->get_args().push_back( *arg );
[10a7775]306 assert( (*arg)->get_results().size() == 1 );
307 Type * type = InitTweak::getPointerBase( (*arg)->get_results().front() );
308 assert( type );
309 newExpr->get_results().push_back( type );
[51587aa]310 *arg = newExpr;
311 } // if
312 break;
313 }
[71f4e4f]314
[51587aa]315 default:
316 // do nothing
317 ;
318 }
[71f4e4f]319
[51587aa]320 switch ( opInfo.type ) {
321 case OT_INDEX:
322 assert( applicationExpr->get_args().size() == 2 );
323 (*arg++)->accept( *this );
[6c4ff37]324 output << "[";
[51587aa]325 (*arg)->accept( *this );
[6c4ff37]326 output << "]";
[51587aa]327 break;
[71f4e4f]328
[51587aa]329 case OT_CALL:
[356189a]330 // there are no intrinsic definitions of the function call operator
[51587aa]331 assert( false );
332 break;
[71f4e4f]333
[f1e012b]334 case OT_CTOR:
[c2ce2350]335 case OT_DTOR:
[356189a]336 if ( applicationExpr->get_args().size() == 1 ) {
[8e9cbb2]337 // the expression fed into a single parameter constructor or destructor may contain side
338 // effects, so must still output this expression
[64071c2]339 output << "(";
[356189a]340 (*arg++)->accept( *this );
[64071c2]341 output << ") /* " << opInfo.inputName << " */";
[356189a]342 } else if ( applicationExpr->get_args().size() == 2 ) {
[c2ce2350]343 // intrinsic two parameter constructors are essentially bitwise assignment
[356189a]344 output << "(";
345 (*arg++)->accept( *this );
346 output << opInfo.symbol;
347 (*arg)->accept( *this );
[c2ce2350]348 output << ") /* " << opInfo.inputName << " */";
[356189a]349 } else {
[c2ce2350]350 // no constructors with 0 or more than 2 parameters
[356189a]351 assert( false );
352 }
353 break;
[f1e012b]354
[51587aa]355 case OT_PREFIX:
356 case OT_PREFIXASSIGN:
357 assert( applicationExpr->get_args().size() == 1 );
[6c4ff37]358 output << "(";
359 output << opInfo.symbol;
[51587aa]360 (*arg)->accept( *this );
[6c4ff37]361 output << ")";
[51587aa]362 break;
[71f4e4f]363
[51587aa]364 case OT_POSTFIX:
365 case OT_POSTFIXASSIGN:
366 assert( applicationExpr->get_args().size() == 1 );
367 (*arg)->accept( *this );
[6c4ff37]368 output << opInfo.symbol;
[51587aa]369 break;
370
[f1e012b]371
[51587aa]372 case OT_INFIX:
373 case OT_INFIXASSIGN:
374 assert( applicationExpr->get_args().size() == 2 );
[6c4ff37]375 output << "(";
[51587aa]376 (*arg++)->accept( *this );
[6c4ff37]377 output << opInfo.symbol;
[51587aa]378 (*arg)->accept( *this );
[6c4ff37]379 output << ")";
[51587aa]380 break;
[71f4e4f]381
[51587aa]382 case OT_CONSTANT:
[721f17a]383 case OT_LABELADDRESS:
384 // there are no intrinsic definitions of 0/1 or label addresses as functions
[51587aa]385 assert( false );
386 }
[17cd4eb]387 } else {
[51587aa]388 varExpr->accept( *this );
[6c4ff37]389 output << "(";
[51587aa]390 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]391 output << ")";
[17cd4eb]392 } // if
[51587aa]393 } else {
394 applicationExpr->get_function()->accept( *this );
[6c4ff37]395 output << "(";
[51587aa]396 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]397 output << ")";
[51587aa]398 } // if
399 }
[71f4e4f]400
[6c4ff37]401 void CodeGenerator::visit( UntypedExpr *untypedExpr ) {
[e04ef3a]402 extension( untypedExpr );
[51587aa]403 if ( NameExpr *nameExpr = dynamic_cast< NameExpr* >( untypedExpr->get_function() ) ) {
404 OperatorInfo opInfo;
405 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
406 std::list< Expression* >::iterator arg = untypedExpr->get_args().begin();
407 switch ( opInfo.type ) {
408 case OT_INDEX:
409 assert( untypedExpr->get_args().size() == 2 );
410 (*arg++)->accept( *this );
[6c4ff37]411 output << "[";
[51587aa]412 (*arg)->accept( *this );
[6c4ff37]413 output << "]";
[51587aa]414 break;
[71f4e4f]415
[51587aa]416 case OT_CALL:
[f1e012b]417 assert( false );
418
[c2ce2350]419
420 case OT_CTOR:
421 case OT_DTOR:
422 if ( untypedExpr->get_args().size() == 1 ) {
[8e9cbb2]423 // the expression fed into a single parameter constructor or destructor may contain side
424 // effects, so must still output this expression
[64071c2]425 output << "(";
[c2ce2350]426 (*arg++)->accept( *this );
[64071c2]427 output << ") /* " << opInfo.inputName << " */";
[c2ce2350]428 } else if ( untypedExpr->get_args().size() == 2 ) {
429 // intrinsic two parameter constructors are essentially bitwise assignment
430 output << "(";
431 (*arg++)->accept( *this );
432 output << opInfo.symbol;
433 (*arg)->accept( *this );
434 output << ") /* " << opInfo.inputName << " */";
435 } else {
436 // no constructors with 0 or more than 2 parameters
437 assert( false );
438 }
[51587aa]439 break;
[71f4e4f]440
[51587aa]441 case OT_PREFIX:
442 case OT_PREFIXASSIGN:
[de62360d]443 case OT_LABELADDRESS:
[51587aa]444 assert( untypedExpr->get_args().size() == 1 );
[6c4ff37]445 output << "(";
446 output << opInfo.symbol;
[51587aa]447 (*arg)->accept( *this );
[6c4ff37]448 output << ")";
[51587aa]449 break;
[71f4e4f]450
[51587aa]451 case OT_POSTFIX:
452 case OT_POSTFIXASSIGN:
453 assert( untypedExpr->get_args().size() == 1 );
454 (*arg)->accept( *this );
[6c4ff37]455 output << opInfo.symbol;
[51587aa]456 break;
[71f4e4f]457
[51587aa]458 case OT_INFIX:
459 case OT_INFIXASSIGN:
460 assert( untypedExpr->get_args().size() == 2 );
[6c4ff37]461 output << "(";
[51587aa]462 (*arg++)->accept( *this );
[6c4ff37]463 output << opInfo.symbol;
[51587aa]464 (*arg)->accept( *this );
[6c4ff37]465 output << ")";
[51587aa]466 break;
[71f4e4f]467
[51587aa]468 case OT_CONSTANT:
469 // there are no intrinsic definitions of 0 or 1 as functions
470 assert( false );
471 }
472 } else {
473 nameExpr->accept( *this );
[6c4ff37]474 output << "(";
[51587aa]475 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
[6c4ff37]476 output << ")";
[51587aa]477 } // if
478 } else {
479 untypedExpr->get_function()->accept( *this );
[6c4ff37]480 output << "(";
[51587aa]481 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
[6c4ff37]482 output << ")";
[51587aa]483 } // if
484 }
[71f4e4f]485
[6c4ff37]486 void CodeGenerator::visit( NameExpr *nameExpr ) {
[e04ef3a]487 extension( nameExpr );
[51587aa]488 OperatorInfo opInfo;
489 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
490 assert( opInfo.type == OT_CONSTANT );
[6c4ff37]491 output << opInfo.symbol;
[51587aa]492 } else {
[6c4ff37]493 output << nameExpr->get_name();
[51587aa]494 } // if
495 }
[71f4e4f]496
[6c4ff37]497 void CodeGenerator::visit( AddressExpr *addressExpr ) {
[e04ef3a]498 extension( addressExpr );
[6c4ff37]499 output << "(&";
[51587aa]500 // this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address
501 if ( VariableExpr *variableExpr = dynamic_cast< VariableExpr* >( addressExpr->get_arg() ) ) {
[6c4ff37]502 output << mangleName( variableExpr->get_var() );
[51587aa]503 } else {
504 addressExpr->get_arg()->accept( *this );
505 } // if
[6c4ff37]506 output << ")";
[51587aa]507 }
508
[6c4ff37]509 void CodeGenerator::visit( CastExpr *castExpr ) {
[e04ef3a]510 extension( castExpr );
[803deb1]511 output << "(";
512 if ( castExpr->get_results().empty() ) {
513 output << "(void)" ;
514 } else if ( ! castExpr->get_results().front()->get_isLvalue() ) {
515 // at least one result type of cast, but not an lvalue
516 output << "(";
517 output << genType( castExpr->get_results().front(), "" );
[71f4e4f]518 output << ")";
[803deb1]519 } else {
[8e9cbb2]520 // otherwise, the cast is to an lvalue type, so the cast should be dropped, since the result of a cast is
[803deb1]521 // never an lvalue in C
[76b48f1]522 }
[803deb1]523 castExpr->get_arg()->accept( *this );
524 output << ")";
[51587aa]525 }
[71f4e4f]526
[6c4ff37]527 void CodeGenerator::visit( UntypedMemberExpr *memberExpr ) {
[51587aa]528 assert( false );
529 }
[71f4e4f]530
[6c4ff37]531 void CodeGenerator::visit( MemberExpr *memberExpr ) {
[e04ef3a]532 extension( memberExpr );
[51587aa]533 memberExpr->get_aggregate()->accept( *this );
[6c4ff37]534 output << "." << mangleName( memberExpr->get_member() );
[51587aa]535 }
[71f4e4f]536
[6c4ff37]537 void CodeGenerator::visit( VariableExpr *variableExpr ) {
[e04ef3a]538 extension( variableExpr );
[51587aa]539 OperatorInfo opInfo;
540 if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) {
[6c4ff37]541 output << opInfo.symbol;
[51587aa]542 } else {
[6c4ff37]543 output << mangleName( variableExpr->get_var() );
[51587aa]544 } // if
545 }
[71f4e4f]546
[6c4ff37]547 void CodeGenerator::visit( ConstantExpr *constantExpr ) {
[51587aa]548 assert( constantExpr->get_constant() );
[e04ef3a]549 extension( constantExpr );
[51587aa]550 constantExpr->get_constant()->accept( *this );
551 }
[71f4e4f]552
[6c4ff37]553 void CodeGenerator::visit( SizeofExpr *sizeofExpr ) {
[e04ef3a]554 extension( sizeofExpr );
[6c4ff37]555 output << "sizeof(";
[51587aa]556 if ( sizeofExpr->get_isType() ) {
[6c4ff37]557 output << genType( sizeofExpr->get_type(), "" );
[51587aa]558 } else {
559 sizeofExpr->get_expr()->accept( *this );
560 } // if
[6c4ff37]561 output << ")";
[51587aa]562 }
[47534159]563
[25a054f]564 void CodeGenerator::visit( AlignofExpr *alignofExpr ) {
[47534159]565 // use GCC extension to avoid bumping std to C11
[8e9cbb2]566 extension( alignofExpr );
[47534159]567 output << "__alignof__(";
[25a054f]568 if ( alignofExpr->get_isType() ) {
569 output << genType( alignofExpr->get_type(), "" );
[47534159]570 } else {
[25a054f]571 alignofExpr->get_expr()->accept( *this );
[47534159]572 } // if
573 output << ")";
574 }
[71f4e4f]575
[2a4b088]576 void CodeGenerator::visit( UntypedOffsetofExpr *offsetofExpr ) {
[8e9cbb2]577 assert( false && "UntypedOffsetofExpr should not reach code generation." );
[2a4b088]578 }
579
[25a054f]580 void CodeGenerator::visit( OffsetofExpr *offsetofExpr ) {
581 // use GCC builtin
582 output << "__builtin_offsetof(";
583 output << genType( offsetofExpr->get_type(), "" );
[e551c69]584 output << ", " << mangleName( offsetofExpr->get_member() );
[25a054f]585 output << ")";
586 }
[d63eeb0]587
[afc1045]588 void CodeGenerator::visit( OffsetPackExpr *offsetPackExpr ) {
[8e9cbb2]589 assert( false && "OffsetPackExpr should not reach code generation." );
[afc1045]590 }
[70a06f6]591
[6c4ff37]592 void CodeGenerator::visit( LogicalExpr *logicalExpr ) {
[e04ef3a]593 extension( logicalExpr );
[6c4ff37]594 output << "(";
[51587aa]595 logicalExpr->get_arg1()->accept( *this );
596 if ( logicalExpr->get_isAnd() ) {
[6c4ff37]597 output << " && ";
[51587aa]598 } else {
[6c4ff37]599 output << " || ";
[51587aa]600 } // if
601 logicalExpr->get_arg2()->accept( *this );
[6c4ff37]602 output << ")";
[51587aa]603 }
[71f4e4f]604
[6c4ff37]605 void CodeGenerator::visit( ConditionalExpr *conditionalExpr ) {
[e04ef3a]606 extension( conditionalExpr );
[6c4ff37]607 output << "(";
[51587aa]608 conditionalExpr->get_arg1()->accept( *this );
[6c4ff37]609 output << " ? ";
[51587aa]610 conditionalExpr->get_arg2()->accept( *this );
[6c4ff37]611 output << " : ";
[51587aa]612 conditionalExpr->get_arg3()->accept( *this );
[6c4ff37]613 output << ")";
[51587aa]614 }
[71f4e4f]615
[6c4ff37]616 void CodeGenerator::visit( CommaExpr *commaExpr ) {
[e04ef3a]617 extension( commaExpr );
[6c4ff37]618 output << "(";
[51587aa]619 commaExpr->get_arg1()->accept( *this );
[6c4ff37]620 output << " , ";
[51587aa]621 commaExpr->get_arg2()->accept( *this );
[6c4ff37]622 output << ")";
[51587aa]623 }
[71f4e4f]624
[6c4ff37]625 void CodeGenerator::visit( TupleExpr *tupleExpr ) {}
[71f4e4f]626
[6c4ff37]627 void CodeGenerator::visit( TypeExpr *typeExpr ) {}
[2b6c1e0]628
[7f5566b]629 void CodeGenerator::visit( AsmExpr *asmExpr ) {
630 if ( asmExpr->get_inout() ) {
631 output << "[ ";
632 asmExpr->get_inout()->accept( *this );
633 output << " ] ";
634 } // if
635 asmExpr->get_constraint()->accept( *this );
636 output << " ( ";
637 asmExpr->get_operand()->accept( *this );
638 output << " )";
639 }
640
[51587aa]641 //*** Statements
[6c4ff37]642 void CodeGenerator::visit( CompoundStmt *compoundStmt ) {
[51587aa]643 std::list<Statement*> ks = compoundStmt->get_kids();
[2b6c1e0]644 output << "{" << endl;
[51587aa]645
[2b6c1e0]646 cur_indent += CodeGenerator::tabsize;
[51587aa]647
[7f5566b]648 for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) {
[cda48b6]649 output << indent << printLabels( (*i)->get_labels() );
[7f5566b]650 (*i)->accept( *this );
[2b6c1e0]651
[6c4ff37]652 output << endl;
[2b6c1e0]653 if ( wantSpacing( *i ) ) {
654 output << endl;
655 }
[51587aa]656 }
[71f4e4f]657 cur_indent -= CodeGenerator::tabsize;
[51587aa]658
[cda48b6]659 output << indent << "}";
[51587aa]660 }
661
[6c4ff37]662 void CodeGenerator::visit( ExprStmt *exprStmt ) {
663 assert( exprStmt );
[321a2481]664 // cast the top-level expression to void to reduce gcc warnings.
665 Expression * expr = new CastExpr( exprStmt->get_expr() );
666 expr->accept( *this );
667 output << ";";
[51587aa]668 }
669
[7f5566b]670 void CodeGenerator::visit( AsmStmt *asmStmt ) {
671 output << "asm ";
672 if ( asmStmt->get_voltile() ) output << "volatile ";
673 if ( ! asmStmt->get_gotolabels().empty() ) output << "goto ";
674 output << "( ";
675 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
676 output << " : ";
677 genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() );
678 output << " : ";
679 genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() );
680 output << " : ";
681 genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() );
682 if ( ! asmStmt->get_gotolabels().empty() ) {
683 output << " : ";
684 for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) {
685 output << *begin++;
686 if ( begin == asmStmt->get_gotolabels().end() ) break;
687 output << ", ";
688 } // for
689 } // if
690 output << " );" ;
691 }
692
[6c4ff37]693 void CodeGenerator::visit( IfStmt *ifStmt ) {
[7f5566b]694 output << "if ( ";
695 ifStmt->get_condition()->accept( *this );
696 output << " ) ";
[51587aa]697
[7f5566b]698 ifStmt->get_thenPart()->accept( *this );
[51587aa]699
700 if ( ifStmt->get_elsePart() != 0) {
[2b6c1e0]701 output << " else ";
[7f5566b]702 ifStmt->get_elsePart()->accept( *this );
[51587aa]703 } // if
704 }
705
[6c4ff37]706 void CodeGenerator::visit( SwitchStmt *switchStmt ) {
[7f5566b]707 output << "switch ( " ;
708 switchStmt->get_condition()->accept( *this );
709 output << " ) ";
[71f4e4f]710
[2b6c1e0]711 output << "{" << std::endl;
[6c4ff37]712 cur_indent += CodeGenerator::tabsize;
[51587aa]713
[6c4ff37]714 acceptAll( switchStmt->get_branches(), *this );
[51587aa]715
[6c4ff37]716 cur_indent -= CodeGenerator::tabsize;
[51587aa]717
[cda48b6]718 output << indent << "}";
[51587aa]719 }
720
[6c4ff37]721 void CodeGenerator::visit( CaseStmt *caseStmt ) {
[cda48b6]722 output << indent;
[eb3261f]723 if ( caseStmt->isDefault()) {
[2b6c1e0]724 output << "default";
[eb3261f]725 } else {
[2b6c1e0]726 output << "case ";
[7f5566b]727 caseStmt->get_condition()->accept( *this );
[17cd4eb]728 } // if
[6c4ff37]729 output << ":\n";
[71f4e4f]730
[51587aa]731 std::list<Statement *> sts = caseStmt->get_statements();
732
[6c4ff37]733 cur_indent += CodeGenerator::tabsize;
[51587aa]734 for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) {
[cda48b6]735 output << indent << printLabels( (*i)->get_labels() ) ;
[7f5566b]736 (*i)->accept( *this );
[6c4ff37]737 output << endl;
[51587aa]738 }
[6c4ff37]739 cur_indent -= CodeGenerator::tabsize;
[51587aa]740 }
741
[6c4ff37]742 void CodeGenerator::visit( BranchStmt *branchStmt ) {
[51587aa]743 switch ( branchStmt->get_type()) {
744 case BranchStmt::Goto:
745 if ( ! branchStmt->get_target().empty() )
[6c4ff37]746 output << "goto " << branchStmt->get_target();
[71f4e4f]747 else {
[51587aa]748 if ( branchStmt->get_computedTarget() != 0 ) {
[6c4ff37]749 output << "goto *";
[51587aa]750 branchStmt->get_computedTarget()->accept( *this );
751 } // if
752 } // if
753 break;
754 case BranchStmt::Break:
[6c4ff37]755 output << "break";
[51587aa]756 break;
757 case BranchStmt::Continue:
[6c4ff37]758 output << "continue";
[51587aa]759 break;
760 }
[2b6c1e0]761 output << ";";
[51587aa]762 }
763
764
[6c4ff37]765 void CodeGenerator::visit( ReturnStmt *returnStmt ) {
766 output << "return ";
[4b2589a]767 maybeAccept( returnStmt->get_expr(), *this );
[6c4ff37]768 output << ";";
[51587aa]769 }
770
[6c4ff37]771 void CodeGenerator::visit( WhileStmt *whileStmt ) {
[321a2481]772 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]773 output << "do" ;
[321a2481]774 } else {
[6c4ff37]775 output << "while (" ;
[7f5566b]776 whileStmt->get_condition()->accept( *this );
[6c4ff37]777 output << ")";
[51587aa]778 } // if
[2b6c1e0]779 output << " ";
[51587aa]780
[2b6c1e0]781 output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() );
[51587aa]782 whileStmt->get_body()->accept( *this );
783
[cda48b6]784 output << indent;
[51587aa]785
786 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]787 output << " while (" ;
[7f5566b]788 whileStmt->get_condition()->accept( *this );
[6c4ff37]789 output << ");";
[51587aa]790 } // if
791 }
792
[6c4ff37]793 void CodeGenerator::visit( ForStmt *forStmt ) {
[8e9cbb2]794 // initialization is always hoisted, so don't bother doing anything with that
[145f1fc]795 output << "for (;";
[51587aa]796
[321a2481]797 if ( forStmt->get_condition() != 0 ) {
[51587aa]798 forStmt->get_condition()->accept( *this );
[321a2481]799 }
[6c4ff37]800 output << ";";
[51587aa]801
[321a2481]802 if ( forStmt->get_increment() != 0 ) {
803 // cast the top-level expression to void to reduce gcc warnings.
804 Expression * expr = new CastExpr( forStmt->get_increment() );
805 expr->accept( *this );
806 }
[2b6c1e0]807 output << ") ";
[51587aa]808
809 if ( forStmt->get_body() != 0 ) {
[2b6c1e0]810 output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() );
[51587aa]811 forStmt->get_body()->accept( *this );
812 } // if
813 }
814
[6c4ff37]815 void CodeGenerator::visit( NullStmt *nullStmt ) {
[cda48b6]816 //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() );
[6c4ff37]817 output << "/* null statement */ ;";
[51587aa]818 }
819
[6c4ff37]820 void CodeGenerator::visit( DeclStmt *declStmt ) {
[51587aa]821 declStmt->get_decl()->accept( *this );
[71f4e4f]822
[51587aa]823 if ( doSemicolon( declStmt->get_decl() ) ) {
[6c4ff37]824 output << ";";
[51587aa]825 } // if
826 }
827
[6c4ff37]828 void CodeGenerator::handleStorageClass( Declaration *decl ) {
[51587aa]829 switch ( decl->get_storageClass() ) {
[68cd1ce]830 case DeclarationNode::Extern:
[6c4ff37]831 output << "extern ";
[51587aa]832 break;
[68cd1ce]833 case DeclarationNode::Static:
[6c4ff37]834 output << "static ";
[51587aa]835 break;
[68cd1ce]836 case DeclarationNode::Auto:
[51587aa]837 // silently drop storage class
838 break;
[68cd1ce]839 case DeclarationNode::Register:
[6c4ff37]840 output << "register ";
[51587aa]841 break;
[68cd1ce]842 case DeclarationNode::Inline:
[de62360d]843 output << "inline ";
[f38c8d9]844 break;
[68cd1ce]845 case DeclarationNode::Fortran:
846 output << "fortran ";
847 break;
848 case DeclarationNode::Noreturn:
849 output << "_Noreturn ";
850 break;
851 case DeclarationNode::Threadlocal:
852 output << "_Thread_local ";
853 break;
854 case DeclarationNode::NoStorageClass:
[f38c8d9]855 break;
[843054c2]856 } // switch
[51587aa]857 }
[51b73452]858} // namespace CodeGen
[51587aa]859
860// Local Variables: //
861// tab-width: 4 //
862// mode: c++ //
863// compile-command: "make install" //
864// End: //
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