source: src/CodeGen/CodeGenerator.cc@ ef3b335

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 ef3b335 was 5d125e4, checked in by Peter A. Buhr <pabuhr@…>, 9 years ago

start code allowing structures to no fields
  • Property mode set to 100644
File size: 24.6 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
[5d125e4]12// Last Modified On : Fri Jul 15 15:53:15 2016
13// Update Count : 306
[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 if ( ! memb.empty() ) {
[5d125e4]169// if ( aggDecl->has_body() ) {
170// std::list< Declaration * > &memb = aggDecl->get_members();
[94b4364]171 output << " {" << endl;
[51587aa]172
[71f4e4f]173 cur_indent += CodeGenerator::tabsize;
[51587aa]174 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) {
[71f4e4f]175 output << indent;
[7f5566b]176 (*i)->accept( *this );
[6c4ff37]177 output << ";" << endl;
[51587aa]178 }
179
[71f4e4f]180 cur_indent -= CodeGenerator::tabsize;
[51587aa]181
[cda48b6]182 output << indent << "}";
[17cd4eb]183 } // if
[51587aa]184 }
[17cd4eb]185
[6c4ff37]186 void CodeGenerator::visit( StructDecl *structDecl ) {
[8e9cbb2]187 extension( structDecl );
[6c4ff37]188 output << "struct ";
[51587aa]189 handleAggregate( structDecl );
190 }
[17cd4eb]191
[8e9cbb2]192 void CodeGenerator::visit( UnionDecl *unionDecl ) {
193 extension( unionDecl );
[6c4ff37]194 output << "union ";
[8e9cbb2]195 handleAggregate( unionDecl );
[51587aa]196 }
[71f4e4f]197
[8e9cbb2]198 void CodeGenerator::visit( EnumDecl *enumDecl ) {
199 extension( enumDecl );
[6c4ff37]200 output << "enum ";
[51587aa]201
[8e9cbb2]202 if ( enumDecl->get_name() != "" )
203 output << enumDecl->get_name();
[71f4e4f]204
[8e9cbb2]205 std::list< Declaration* > &memb = enumDecl->get_members();
[51587aa]206
207 if ( ! memb.empty() ) {
[cda48b6]208 output << " {" << endl;
[51587aa]209
[71f4e4f]210 cur_indent += CodeGenerator::tabsize;
[51587aa]211 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) {
212 ObjectDecl *obj = dynamic_cast< ObjectDecl* >( *i );
213 assert( obj );
[71f4e4f]214 output << indent << mangleName( obj );
[51587aa]215 if ( obj->get_init() ) {
[6c4ff37]216 output << " = ";
[7f5566b]217 obj->get_init()->accept( *this );
[51587aa]218 } // if
[6c4ff37]219 output << "," << endl;
[51587aa]220 } // for
221
[71f4e4f]222 cur_indent -= CodeGenerator::tabsize;
[51587aa]223
[cda48b6]224 output << indent << "}";
[51587aa]225 } // if
226 }
[71f4e4f]227
[8e9cbb2]228 void CodeGenerator::visit( TraitDecl *traitDecl ) {}
[71f4e4f]229
[6c4ff37]230 void CodeGenerator::visit( TypedefDecl *typeDecl ) {
[8e9cbb2]231 assert( false && "Typedefs are removed and substituted in earlier passes." );
232 //output << "typedef ";
233 //output << genType( typeDecl->get_base(), typeDecl->get_name() );
[51587aa]234 }
[71f4e4f]235
[6c4ff37]236 void CodeGenerator::visit( TypeDecl *typeDecl ) {
[51587aa]237 // really, we should mutate this into something that isn't a TypeDecl but that requires large-scale changes,
238 // still to be done
[8e9cbb2]239 extension( typeDecl );
[6c4ff37]240 output << "extern unsigned long " << typeDecl->get_name();
[51587aa]241 if ( typeDecl->get_base() ) {
[6c4ff37]242 output << " = sizeof( " << genType( typeDecl->get_base(), "" ) << " )";
[51587aa]243 } // if
244 }
245
[e45215c]246 void CodeGenerator::printDesignators( std::list< Expression * > & designators ) {
247 typedef std::list< Expression * > DesignatorList;
248 if ( designators.size() == 0 ) return;
249 for ( DesignatorList::iterator iter = designators.begin(); iter != designators.end(); ++iter ) {
[8a4da06]250 if ( dynamic_cast< NameExpr * >( *iter ) ) {
[f32c7f4]251 // if expression is a name, then initializing aggregate member
252 output << ".";
253 (*iter)->accept( *this );
254 } else {
255 // if not a simple name, it has to be a constant expression, i.e. an array designator
[e45215c]256 output << "[";
257 (*iter)->accept( *this );
258 output << "]";
259 }
260 }
261 output << " = ";
262 }
263
[6c4ff37]264 void CodeGenerator::visit( SingleInit *init ) {
[e45215c]265 printDesignators( init->get_designators() );
[51587aa]266 init->get_value()->accept( *this );
267 }
268
[6c4ff37]269 void CodeGenerator::visit( ListInit *init ) {
[e45215c]270 printDesignators( init->get_designators() );
[6c4ff37]271 output << "{ ";
[5b40f30]272 if ( init->begin_initializers() == init->end_initializers() ) {
[8e9cbb2]273 // illegal to leave initializer list empty for scalar initializers, but always legal to have 0
[5b40f30]274 output << "0";
275 } else {
276 genCommaList( init->begin_initializers(), init->end_initializers() );
277 }
[6c4ff37]278 output << " }";
[51587aa]279 }
280
[71f4e4f]281 void CodeGenerator::visit( Constant *constant ) {
[6c4ff37]282 output << constant->get_value() ;
[51587aa]283 }
284
285 //*** Expressions
[6c4ff37]286 void CodeGenerator::visit( ApplicationExpr *applicationExpr ) {
[e04ef3a]287 extension( applicationExpr );
[51587aa]288 if ( VariableExpr *varExpr = dynamic_cast< VariableExpr* >( applicationExpr->get_function() ) ) {
289 OperatorInfo opInfo;
290 if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( varExpr->get_var()->get_name(), opInfo ) ) {
291 std::list< Expression* >::iterator arg = applicationExpr->get_args().begin();
292 switch ( opInfo.type ) {
293 case OT_PREFIXASSIGN:
294 case OT_POSTFIXASSIGN:
295 case OT_INFIXASSIGN:
[356189a]296 case OT_CTOR:
[c2ce2350]297 case OT_DTOR:
[51587aa]298 {
299 assert( arg != applicationExpr->get_args().end() );
300 if ( AddressExpr *addrExpr = dynamic_cast< AddressExpr * >( *arg ) ) {
[356189a]301 // remove & from first assignment/ctor argument
[51587aa]302 *arg = addrExpr->get_arg();
303 } else {
[356189a]304 // no address-of operator, so must be a pointer - add dereference
[51587aa]305 UntypedExpr *newExpr = new UntypedExpr( new NameExpr( "*?" ) );
306 newExpr->get_args().push_back( *arg );
[10a7775]307 assert( (*arg)->get_results().size() == 1 );
308 Type * type = InitTweak::getPointerBase( (*arg)->get_results().front() );
309 assert( type );
310 newExpr->get_results().push_back( type );
[51587aa]311 *arg = newExpr;
312 } // if
313 break;
314 }
[71f4e4f]315
[51587aa]316 default:
317 // do nothing
318 ;
319 }
[71f4e4f]320
[51587aa]321 switch ( opInfo.type ) {
322 case OT_INDEX:
323 assert( applicationExpr->get_args().size() == 2 );
324 (*arg++)->accept( *this );
[6c4ff37]325 output << "[";
[51587aa]326 (*arg)->accept( *this );
[6c4ff37]327 output << "]";
[51587aa]328 break;
[71f4e4f]329
[51587aa]330 case OT_CALL:
[356189a]331 // there are no intrinsic definitions of the function call operator
[51587aa]332 assert( false );
333 break;
[71f4e4f]334
[f1e012b]335 case OT_CTOR:
[c2ce2350]336 case OT_DTOR:
[356189a]337 if ( applicationExpr->get_args().size() == 1 ) {
[8e9cbb2]338 // the expression fed into a single parameter constructor or destructor may contain side
339 // effects, so must still output this expression
[64071c2]340 output << "(";
[356189a]341 (*arg++)->accept( *this );
[64071c2]342 output << ") /* " << opInfo.inputName << " */";
[356189a]343 } else if ( applicationExpr->get_args().size() == 2 ) {
[c2ce2350]344 // intrinsic two parameter constructors are essentially bitwise assignment
[356189a]345 output << "(";
346 (*arg++)->accept( *this );
347 output << opInfo.symbol;
348 (*arg)->accept( *this );
[c2ce2350]349 output << ") /* " << opInfo.inputName << " */";
[356189a]350 } else {
[c2ce2350]351 // no constructors with 0 or more than 2 parameters
[356189a]352 assert( false );
353 }
354 break;
[f1e012b]355
[51587aa]356 case OT_PREFIX:
357 case OT_PREFIXASSIGN:
358 assert( applicationExpr->get_args().size() == 1 );
[6c4ff37]359 output << "(";
360 output << opInfo.symbol;
[51587aa]361 (*arg)->accept( *this );
[6c4ff37]362 output << ")";
[51587aa]363 break;
[71f4e4f]364
[51587aa]365 case OT_POSTFIX:
366 case OT_POSTFIXASSIGN:
367 assert( applicationExpr->get_args().size() == 1 );
368 (*arg)->accept( *this );
[6c4ff37]369 output << opInfo.symbol;
[51587aa]370 break;
371
[f1e012b]372
[51587aa]373 case OT_INFIX:
374 case OT_INFIXASSIGN:
375 assert( applicationExpr->get_args().size() == 2 );
[6c4ff37]376 output << "(";
[51587aa]377 (*arg++)->accept( *this );
[6c4ff37]378 output << opInfo.symbol;
[51587aa]379 (*arg)->accept( *this );
[6c4ff37]380 output << ")";
[51587aa]381 break;
[71f4e4f]382
[51587aa]383 case OT_CONSTANT:
[721f17a]384 case OT_LABELADDRESS:
385 // there are no intrinsic definitions of 0/1 or label addresses as functions
[51587aa]386 assert( false );
387 }
[17cd4eb]388 } else {
[51587aa]389 varExpr->accept( *this );
[6c4ff37]390 output << "(";
[51587aa]391 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]392 output << ")";
[17cd4eb]393 } // if
[51587aa]394 } else {
395 applicationExpr->get_function()->accept( *this );
[6c4ff37]396 output << "(";
[51587aa]397 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]398 output << ")";
[51587aa]399 } // if
400 }
[71f4e4f]401
[6c4ff37]402 void CodeGenerator::visit( UntypedExpr *untypedExpr ) {
[e04ef3a]403 extension( untypedExpr );
[51587aa]404 if ( NameExpr *nameExpr = dynamic_cast< NameExpr* >( untypedExpr->get_function() ) ) {
405 OperatorInfo opInfo;
406 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
407 std::list< Expression* >::iterator arg = untypedExpr->get_args().begin();
408 switch ( opInfo.type ) {
409 case OT_INDEX:
410 assert( untypedExpr->get_args().size() == 2 );
411 (*arg++)->accept( *this );
[6c4ff37]412 output << "[";
[51587aa]413 (*arg)->accept( *this );
[6c4ff37]414 output << "]";
[51587aa]415 break;
[71f4e4f]416
[51587aa]417 case OT_CALL:
[f1e012b]418 assert( false );
419
[c2ce2350]420
421 case OT_CTOR:
422 case OT_DTOR:
423 if ( untypedExpr->get_args().size() == 1 ) {
[8e9cbb2]424 // the expression fed into a single parameter constructor or destructor may contain side
425 // effects, so must still output this expression
[64071c2]426 output << "(";
[c2ce2350]427 (*arg++)->accept( *this );
[64071c2]428 output << ") /* " << opInfo.inputName << " */";
[c2ce2350]429 } else if ( untypedExpr->get_args().size() == 2 ) {
430 // intrinsic two parameter constructors are essentially bitwise assignment
431 output << "(";
432 (*arg++)->accept( *this );
433 output << opInfo.symbol;
434 (*arg)->accept( *this );
435 output << ") /* " << opInfo.inputName << " */";
436 } else {
437 // no constructors with 0 or more than 2 parameters
438 assert( false );
439 }
[51587aa]440 break;
[71f4e4f]441
[51587aa]442 case OT_PREFIX:
443 case OT_PREFIXASSIGN:
[de62360d]444 case OT_LABELADDRESS:
[51587aa]445 assert( untypedExpr->get_args().size() == 1 );
[6c4ff37]446 output << "(";
447 output << opInfo.symbol;
[51587aa]448 (*arg)->accept( *this );
[6c4ff37]449 output << ")";
[51587aa]450 break;
[71f4e4f]451
[51587aa]452 case OT_POSTFIX:
453 case OT_POSTFIXASSIGN:
454 assert( untypedExpr->get_args().size() == 1 );
455 (*arg)->accept( *this );
[6c4ff37]456 output << opInfo.symbol;
[51587aa]457 break;
[71f4e4f]458
[51587aa]459 case OT_INFIX:
460 case OT_INFIXASSIGN:
461 assert( untypedExpr->get_args().size() == 2 );
[6c4ff37]462 output << "(";
[51587aa]463 (*arg++)->accept( *this );
[6c4ff37]464 output << opInfo.symbol;
[51587aa]465 (*arg)->accept( *this );
[6c4ff37]466 output << ")";
[51587aa]467 break;
[71f4e4f]468
[51587aa]469 case OT_CONSTANT:
470 // there are no intrinsic definitions of 0 or 1 as functions
471 assert( false );
472 }
473 } else {
474 nameExpr->accept( *this );
[6c4ff37]475 output << "(";
[51587aa]476 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
[6c4ff37]477 output << ")";
[51587aa]478 } // if
479 } else {
480 untypedExpr->get_function()->accept( *this );
[6c4ff37]481 output << "(";
[51587aa]482 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
[6c4ff37]483 output << ")";
[51587aa]484 } // if
485 }
[71f4e4f]486
[6c4ff37]487 void CodeGenerator::visit( NameExpr *nameExpr ) {
[e04ef3a]488 extension( nameExpr );
[51587aa]489 OperatorInfo opInfo;
490 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
491 assert( opInfo.type == OT_CONSTANT );
[6c4ff37]492 output << opInfo.symbol;
[51587aa]493 } else {
[6c4ff37]494 output << nameExpr->get_name();
[51587aa]495 } // if
496 }
[71f4e4f]497
[6c4ff37]498 void CodeGenerator::visit( AddressExpr *addressExpr ) {
[e04ef3a]499 extension( addressExpr );
[6c4ff37]500 output << "(&";
[51587aa]501 // this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address
502 if ( VariableExpr *variableExpr = dynamic_cast< VariableExpr* >( addressExpr->get_arg() ) ) {
[6c4ff37]503 output << mangleName( variableExpr->get_var() );
[51587aa]504 } else {
505 addressExpr->get_arg()->accept( *this );
506 } // if
[6c4ff37]507 output << ")";
[51587aa]508 }
509
[6c4ff37]510 void CodeGenerator::visit( CastExpr *castExpr ) {
[e04ef3a]511 extension( castExpr );
[803deb1]512 output << "(";
513 if ( castExpr->get_results().empty() ) {
514 output << "(void)" ;
515 } else if ( ! castExpr->get_results().front()->get_isLvalue() ) {
516 // at least one result type of cast, but not an lvalue
517 output << "(";
518 output << genType( castExpr->get_results().front(), "" );
[71f4e4f]519 output << ")";
[803deb1]520 } else {
[8e9cbb2]521 // otherwise, the cast is to an lvalue type, so the cast should be dropped, since the result of a cast is
[803deb1]522 // never an lvalue in C
[76b48f1]523 }
[803deb1]524 castExpr->get_arg()->accept( *this );
525 output << ")";
[51587aa]526 }
[71f4e4f]527
[6c4ff37]528 void CodeGenerator::visit( UntypedMemberExpr *memberExpr ) {
[51587aa]529 assert( false );
530 }
[71f4e4f]531
[6c4ff37]532 void CodeGenerator::visit( MemberExpr *memberExpr ) {
[e04ef3a]533 extension( memberExpr );
[51587aa]534 memberExpr->get_aggregate()->accept( *this );
[6c4ff37]535 output << "." << mangleName( memberExpr->get_member() );
[51587aa]536 }
[71f4e4f]537
[6c4ff37]538 void CodeGenerator::visit( VariableExpr *variableExpr ) {
[e04ef3a]539 extension( variableExpr );
[51587aa]540 OperatorInfo opInfo;
541 if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) {
[6c4ff37]542 output << opInfo.symbol;
[51587aa]543 } else {
[6c4ff37]544 output << mangleName( variableExpr->get_var() );
[51587aa]545 } // if
546 }
[71f4e4f]547
[6c4ff37]548 void CodeGenerator::visit( ConstantExpr *constantExpr ) {
[51587aa]549 assert( constantExpr->get_constant() );
[e04ef3a]550 extension( constantExpr );
[51587aa]551 constantExpr->get_constant()->accept( *this );
552 }
[71f4e4f]553
[6c4ff37]554 void CodeGenerator::visit( SizeofExpr *sizeofExpr ) {
[e04ef3a]555 extension( sizeofExpr );
[6c4ff37]556 output << "sizeof(";
[51587aa]557 if ( sizeofExpr->get_isType() ) {
[6c4ff37]558 output << genType( sizeofExpr->get_type(), "" );
[51587aa]559 } else {
560 sizeofExpr->get_expr()->accept( *this );
561 } // if
[6c4ff37]562 output << ")";
[51587aa]563 }
[47534159]564
[25a054f]565 void CodeGenerator::visit( AlignofExpr *alignofExpr ) {
[47534159]566 // use GCC extension to avoid bumping std to C11
[8e9cbb2]567 extension( alignofExpr );
[47534159]568 output << "__alignof__(";
[25a054f]569 if ( alignofExpr->get_isType() ) {
570 output << genType( alignofExpr->get_type(), "" );
[47534159]571 } else {
[25a054f]572 alignofExpr->get_expr()->accept( *this );
[47534159]573 } // if
574 output << ")";
575 }
[71f4e4f]576
[2a4b088]577 void CodeGenerator::visit( UntypedOffsetofExpr *offsetofExpr ) {
[8e9cbb2]578 assert( false && "UntypedOffsetofExpr should not reach code generation." );
[2a4b088]579 }
580
[25a054f]581 void CodeGenerator::visit( OffsetofExpr *offsetofExpr ) {
582 // use GCC builtin
583 output << "__builtin_offsetof(";
584 output << genType( offsetofExpr->get_type(), "" );
[e551c69]585 output << ", " << mangleName( offsetofExpr->get_member() );
[25a054f]586 output << ")";
587 }
[d63eeb0]588
[afc1045]589 void CodeGenerator::visit( OffsetPackExpr *offsetPackExpr ) {
[8e9cbb2]590 assert( false && "OffsetPackExpr should not reach code generation." );
[afc1045]591 }
[70a06f6]592
[6c4ff37]593 void CodeGenerator::visit( LogicalExpr *logicalExpr ) {
[e04ef3a]594 extension( logicalExpr );
[6c4ff37]595 output << "(";
[51587aa]596 logicalExpr->get_arg1()->accept( *this );
597 if ( logicalExpr->get_isAnd() ) {
[6c4ff37]598 output << " && ";
[51587aa]599 } else {
[6c4ff37]600 output << " || ";
[51587aa]601 } // if
602 logicalExpr->get_arg2()->accept( *this );
[6c4ff37]603 output << ")";
[51587aa]604 }
[71f4e4f]605
[6c4ff37]606 void CodeGenerator::visit( ConditionalExpr *conditionalExpr ) {
[e04ef3a]607 extension( conditionalExpr );
[6c4ff37]608 output << "(";
[51587aa]609 conditionalExpr->get_arg1()->accept( *this );
[6c4ff37]610 output << " ? ";
[51587aa]611 conditionalExpr->get_arg2()->accept( *this );
[6c4ff37]612 output << " : ";
[51587aa]613 conditionalExpr->get_arg3()->accept( *this );
[6c4ff37]614 output << ")";
[51587aa]615 }
[71f4e4f]616
[6c4ff37]617 void CodeGenerator::visit( CommaExpr *commaExpr ) {
[e04ef3a]618 extension( commaExpr );
[6c4ff37]619 output << "(";
[51587aa]620 commaExpr->get_arg1()->accept( *this );
[6c4ff37]621 output << " , ";
[51587aa]622 commaExpr->get_arg2()->accept( *this );
[6c4ff37]623 output << ")";
[51587aa]624 }
[71f4e4f]625
[6c4ff37]626 void CodeGenerator::visit( TupleExpr *tupleExpr ) {}
[71f4e4f]627
[6c4ff37]628 void CodeGenerator::visit( TypeExpr *typeExpr ) {}
[2b6c1e0]629
[7f5566b]630 void CodeGenerator::visit( AsmExpr *asmExpr ) {
631 if ( asmExpr->get_inout() ) {
632 output << "[ ";
633 asmExpr->get_inout()->accept( *this );
634 output << " ] ";
635 } // if
636 asmExpr->get_constraint()->accept( *this );
637 output << " ( ";
638 asmExpr->get_operand()->accept( *this );
639 output << " )";
640 }
641
[51587aa]642 //*** Statements
[6c4ff37]643 void CodeGenerator::visit( CompoundStmt *compoundStmt ) {
[51587aa]644 std::list<Statement*> ks = compoundStmt->get_kids();
[2b6c1e0]645 output << "{" << endl;
[51587aa]646
[2b6c1e0]647 cur_indent += CodeGenerator::tabsize;
[51587aa]648
[7f5566b]649 for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) {
[cda48b6]650 output << indent << printLabels( (*i)->get_labels() );
[7f5566b]651 (*i)->accept( *this );
[2b6c1e0]652
[6c4ff37]653 output << endl;
[2b6c1e0]654 if ( wantSpacing( *i ) ) {
655 output << endl;
656 }
[51587aa]657 }
[71f4e4f]658 cur_indent -= CodeGenerator::tabsize;
[51587aa]659
[cda48b6]660 output << indent << "}";
[51587aa]661 }
662
[6c4ff37]663 void CodeGenerator::visit( ExprStmt *exprStmt ) {
664 assert( exprStmt );
[321a2481]665 // cast the top-level expression to void to reduce gcc warnings.
666 Expression * expr = new CastExpr( exprStmt->get_expr() );
667 expr->accept( *this );
668 output << ";";
[51587aa]669 }
670
[7f5566b]671 void CodeGenerator::visit( AsmStmt *asmStmt ) {
672 output << "asm ";
673 if ( asmStmt->get_voltile() ) output << "volatile ";
674 if ( ! asmStmt->get_gotolabels().empty() ) output << "goto ";
675 output << "( ";
676 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
677 output << " : ";
678 genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() );
679 output << " : ";
680 genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() );
681 output << " : ";
682 genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() );
683 if ( ! asmStmt->get_gotolabels().empty() ) {
684 output << " : ";
685 for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) {
686 output << *begin++;
687 if ( begin == asmStmt->get_gotolabels().end() ) break;
688 output << ", ";
689 } // for
690 } // if
691 output << " );" ;
692 }
693
[6c4ff37]694 void CodeGenerator::visit( IfStmt *ifStmt ) {
[7f5566b]695 output << "if ( ";
696 ifStmt->get_condition()->accept( *this );
697 output << " ) ";
[51587aa]698
[7f5566b]699 ifStmt->get_thenPart()->accept( *this );
[51587aa]700
701 if ( ifStmt->get_elsePart() != 0) {
[2b6c1e0]702 output << " else ";
[7f5566b]703 ifStmt->get_elsePart()->accept( *this );
[51587aa]704 } // if
705 }
706
[6c4ff37]707 void CodeGenerator::visit( SwitchStmt *switchStmt ) {
[7f5566b]708 output << "switch ( " ;
709 switchStmt->get_condition()->accept( *this );
710 output << " ) ";
[71f4e4f]711
[2b6c1e0]712 output << "{" << std::endl;
[6c4ff37]713 cur_indent += CodeGenerator::tabsize;
[51587aa]714
[6c4ff37]715 acceptAll( switchStmt->get_branches(), *this );
[51587aa]716
[6c4ff37]717 cur_indent -= CodeGenerator::tabsize;
[51587aa]718
[cda48b6]719 output << indent << "}";
[51587aa]720 }
721
[6c4ff37]722 void CodeGenerator::visit( CaseStmt *caseStmt ) {
[cda48b6]723 output << indent;
[eb3261f]724 if ( caseStmt->isDefault()) {
[2b6c1e0]725 output << "default";
[eb3261f]726 } else {
[2b6c1e0]727 output << "case ";
[7f5566b]728 caseStmt->get_condition()->accept( *this );
[17cd4eb]729 } // if
[6c4ff37]730 output << ":\n";
[71f4e4f]731
[51587aa]732 std::list<Statement *> sts = caseStmt->get_statements();
733
[6c4ff37]734 cur_indent += CodeGenerator::tabsize;
[51587aa]735 for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) {
[cda48b6]736 output << indent << printLabels( (*i)->get_labels() ) ;
[7f5566b]737 (*i)->accept( *this );
[6c4ff37]738 output << endl;
[51587aa]739 }
[6c4ff37]740 cur_indent -= CodeGenerator::tabsize;
[51587aa]741 }
742
[6c4ff37]743 void CodeGenerator::visit( BranchStmt *branchStmt ) {
[51587aa]744 switch ( branchStmt->get_type()) {
745 case BranchStmt::Goto:
746 if ( ! branchStmt->get_target().empty() )
[6c4ff37]747 output << "goto " << branchStmt->get_target();
[71f4e4f]748 else {
[51587aa]749 if ( branchStmt->get_computedTarget() != 0 ) {
[6c4ff37]750 output << "goto *";
[51587aa]751 branchStmt->get_computedTarget()->accept( *this );
752 } // if
753 } // if
754 break;
755 case BranchStmt::Break:
[6c4ff37]756 output << "break";
[51587aa]757 break;
758 case BranchStmt::Continue:
[6c4ff37]759 output << "continue";
[51587aa]760 break;
761 }
[2b6c1e0]762 output << ";";
[51587aa]763 }
764
765
[6c4ff37]766 void CodeGenerator::visit( ReturnStmt *returnStmt ) {
767 output << "return ";
[4b2589a]768 maybeAccept( returnStmt->get_expr(), *this );
[6c4ff37]769 output << ";";
[51587aa]770 }
771
[6c4ff37]772 void CodeGenerator::visit( WhileStmt *whileStmt ) {
[321a2481]773 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]774 output << "do" ;
[321a2481]775 } else {
[6c4ff37]776 output << "while (" ;
[7f5566b]777 whileStmt->get_condition()->accept( *this );
[6c4ff37]778 output << ")";
[51587aa]779 } // if
[2b6c1e0]780 output << " ";
[51587aa]781
[2b6c1e0]782 output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() );
[51587aa]783 whileStmt->get_body()->accept( *this );
784
[cda48b6]785 output << indent;
[51587aa]786
787 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]788 output << " while (" ;
[7f5566b]789 whileStmt->get_condition()->accept( *this );
[6c4ff37]790 output << ");";
[51587aa]791 } // if
792 }
793
[6c4ff37]794 void CodeGenerator::visit( ForStmt *forStmt ) {
[8e9cbb2]795 // initialization is always hoisted, so don't bother doing anything with that
[145f1fc]796 output << "for (;";
[51587aa]797
[321a2481]798 if ( forStmt->get_condition() != 0 ) {
[51587aa]799 forStmt->get_condition()->accept( *this );
[321a2481]800 }
[6c4ff37]801 output << ";";
[51587aa]802
[321a2481]803 if ( forStmt->get_increment() != 0 ) {
804 // cast the top-level expression to void to reduce gcc warnings.
805 Expression * expr = new CastExpr( forStmt->get_increment() );
806 expr->accept( *this );
807 }
[2b6c1e0]808 output << ") ";
[51587aa]809
810 if ( forStmt->get_body() != 0 ) {
[2b6c1e0]811 output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() );
[51587aa]812 forStmt->get_body()->accept( *this );
813 } // if
814 }
815
[6c4ff37]816 void CodeGenerator::visit( NullStmt *nullStmt ) {
[cda48b6]817 //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() );
[6c4ff37]818 output << "/* null statement */ ;";
[51587aa]819 }
820
[6c4ff37]821 void CodeGenerator::visit( DeclStmt *declStmt ) {
[51587aa]822 declStmt->get_decl()->accept( *this );
[71f4e4f]823
[51587aa]824 if ( doSemicolon( declStmt->get_decl() ) ) {
[6c4ff37]825 output << ";";
[51587aa]826 } // if
827 }
828
[6c4ff37]829 void CodeGenerator::handleStorageClass( Declaration *decl ) {
[51587aa]830 switch ( decl->get_storageClass() ) {
[68cd1ce]831 case DeclarationNode::Extern:
[6c4ff37]832 output << "extern ";
[51587aa]833 break;
[68cd1ce]834 case DeclarationNode::Static:
[6c4ff37]835 output << "static ";
[51587aa]836 break;
[68cd1ce]837 case DeclarationNode::Auto:
[51587aa]838 // silently drop storage class
839 break;
[68cd1ce]840 case DeclarationNode::Register:
[6c4ff37]841 output << "register ";
[51587aa]842 break;
[68cd1ce]843 case DeclarationNode::Inline:
[de62360d]844 output << "inline ";
[f38c8d9]845 break;
[68cd1ce]846 case DeclarationNode::Fortran:
847 output << "fortran ";
848 break;
849 case DeclarationNode::Noreturn:
850 output << "_Noreturn ";
851 break;
852 case DeclarationNode::Threadlocal:
853 output << "_Thread_local ";
854 break;
855 case DeclarationNode::NoStorageClass:
[f38c8d9]856 break;
[843054c2]857 } // switch
[51587aa]858 }
[51b73452]859} // namespace CodeGen
[51587aa]860
861// Local Variables: //
862// tab-width: 4 //
863// mode: c++ //
864// compile-command: "make install" //
865// End: //
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