source: src/CodeGen/CodeGenerator.cc@ 74d1804

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 74d1804 was c8c03683, checked in by Peter A. Buhr <pabuhr@…>, 9 years ago

Merge branch 'master' of plg2:software/cfa/cfa-cc
  • Property mode set to 100644
File size: 23.9 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
[cda48b6]50 ostream & CodeGenerator::Indenter::operator()( ostream & output ) {
51 return output << string( cg.cur_indent, ' ' );
52 }
53
54 ostream & operator<<( ostream & output, CodeGenerator::Indenter &indent ) {
55 return indent( output );
56 }
[51587aa]57
[7f5566b]58 CodeGenerator::CodeGenerator( std::ostream &os ) : indent( *this), cur_indent( 0 ), insideFunction( false ), output( os ) { }
[cda48b6]59
60 CodeGenerator::CodeGenerator( std::ostream &os, std::string init, int indentation, bool infunp )
[7f5566b]61 : indent( *this), cur_indent( indentation ), insideFunction( infunp ), output( os ) {
[6c4ff37]62 //output << std::string( init );
[51587aa]63 }
64
[cda48b6]65 CodeGenerator::CodeGenerator( std::ostream &os, char *init, int indentation, bool infunp )
[7f5566b]66 : indent( *this ), cur_indent( indentation ), insideFunction( infunp ), output( os ) {
[6c4ff37]67 //output << std::string( init );
[51587aa]68 }
69
70 string mangleName( DeclarationWithType *decl ) {
71 if ( decl->get_mangleName() != "" ) {
[f326f99]72 // need to incorporate scope level in order to differentiate names for destructors
73 return decl->get_scopedMangleName();
[51587aa]74 } else {
75 return decl->get_name();
76 } // if
77 }
[94b4364]78
[7baed7d]79 void CodeGenerator::genAttributes( std::list< Attribute * > & attributes ) {
80 if ( ! attributes.empty() ) {
81 output << "__attribute__ ((";
82 for ( Attribute *& attr : attributes ) {
83 if ( ! attr->empty() ) {
84 output << attr->get_name() << "(";
85 genCommaList( attr->get_parameters().begin(), attr->get_parameters().end() );
86 output << ")";
[03e5d14]87 }
[7baed7d]88 output << ",";
89 }
90 output << ")) ";
[4e24610]91 }
[7baed7d]92 }
93
94
95 //*** Declarations
96 void CodeGenerator::visit( FunctionDecl *functionDecl ) {
97 genAttributes( functionDecl->get_attributes() );
98
[51587aa]99 handleStorageClass( functionDecl );
[f38c8d9]100 if ( functionDecl->get_isInline() ) {
[6c4ff37]101 output << "inline ";
[f38c8d9]102 } // if
[de62360d]103 if ( functionDecl->get_isNoreturn() ) {
104 output << "_Noreturn ";
105 } // if
[6c4ff37]106 output << genType( functionDecl->get_functionType(), mangleName( functionDecl ) );
[51587aa]107
108 // how to get this to the Functype?
109 std::list< Declaration * > olds = functionDecl->get_oldDecls();
110 if ( ! olds.empty() ) {
[6c4ff37]111 output << " /* function has old declaration */";
[51587aa]112 } // if
113
114 // acceptAll( functionDecl->get_oldDecls(), *this );
115 if ( functionDecl->get_statements() ) {
[7f5566b]116 functionDecl->get_statements()->accept( *this );
[51587aa]117 } // if
118 }
119
[6c4ff37]120 void CodeGenerator::visit( ObjectDecl *objectDecl ) {
[51587aa]121 handleStorageClass( objectDecl );
[6c4ff37]122 output << genType( objectDecl->get_type(), mangleName( objectDecl ) );
[71f4e4f]123
[51587aa]124 if ( objectDecl->get_init() ) {
[6c4ff37]125 output << " = ";
[51587aa]126 objectDecl->get_init()->accept( *this );
127 } // if
128 if ( objectDecl->get_bitfieldWidth() ) {
[6c4ff37]129 output << ":";
[51587aa]130 objectDecl->get_bitfieldWidth()->accept( *this );
131 } // if
132 }
133
[6c4ff37]134 void CodeGenerator::handleAggregate( AggregateDecl *aggDecl ) {
[51587aa]135 if ( aggDecl->get_name() != "" )
[6c4ff37]136 output << aggDecl->get_name();
[71f4e4f]137
[51587aa]138 std::list< Declaration * > &memb = aggDecl->get_members();
139
140 if ( ! memb.empty() ) {
[94b4364]141 output << " {" << endl;
[51587aa]142
[71f4e4f]143 cur_indent += CodeGenerator::tabsize;
[51587aa]144 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) {
[71f4e4f]145 output << indent;
[7f5566b]146 (*i)->accept( *this );
[6c4ff37]147 output << ";" << endl;
[51587aa]148 }
149
[71f4e4f]150 cur_indent -= CodeGenerator::tabsize;
[51587aa]151
[cda48b6]152 output << indent << "}";
[17cd4eb]153 } // if
[51587aa]154 }
[17cd4eb]155
[6c4ff37]156 void CodeGenerator::visit( StructDecl *structDecl ) {
157 output << "struct ";
[51587aa]158 handleAggregate( structDecl );
159 }
[17cd4eb]160
[6c4ff37]161 void CodeGenerator::visit( UnionDecl *aggregateDecl ) {
162 output << "union ";
[51587aa]163 handleAggregate( aggregateDecl );
164 }
[71f4e4f]165
[6c4ff37]166 void CodeGenerator::visit( EnumDecl *aggDecl ) {
167 output << "enum ";
[51587aa]168
169 if ( aggDecl->get_name() != "" )
[6c4ff37]170 output << aggDecl->get_name();
[71f4e4f]171
[51587aa]172 std::list< Declaration* > &memb = aggDecl->get_members();
173
174 if ( ! memb.empty() ) {
[cda48b6]175 output << " {" << endl;
[51587aa]176
[71f4e4f]177 cur_indent += CodeGenerator::tabsize;
[51587aa]178 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) {
179 ObjectDecl *obj = dynamic_cast< ObjectDecl* >( *i );
180 assert( obj );
[71f4e4f]181 output << indent << mangleName( obj );
[51587aa]182 if ( obj->get_init() ) {
[6c4ff37]183 output << " = ";
[7f5566b]184 obj->get_init()->accept( *this );
[51587aa]185 } // if
[6c4ff37]186 output << "," << endl;
[51587aa]187 } // for
188
[71f4e4f]189 cur_indent -= CodeGenerator::tabsize;
[51587aa]190
[cda48b6]191 output << indent << "}";
[51587aa]192 } // if
193 }
[71f4e4f]194
[4040425]195 void CodeGenerator::visit( TraitDecl *aggregateDecl ) {}
[71f4e4f]196
[6c4ff37]197 void CodeGenerator::visit( TypedefDecl *typeDecl ) {
198 output << "typedef ";
199 output << genType( typeDecl->get_base(), typeDecl->get_name() );
[51587aa]200 }
[71f4e4f]201
[6c4ff37]202 void CodeGenerator::visit( TypeDecl *typeDecl ) {
[51587aa]203 // really, we should mutate this into something that isn't a TypeDecl but that requires large-scale changes,
204 // still to be done
[6c4ff37]205 output << "extern unsigned long " << typeDecl->get_name();
[51587aa]206 if ( typeDecl->get_base() ) {
[6c4ff37]207 output << " = sizeof( " << genType( typeDecl->get_base(), "" ) << " )";
[51587aa]208 } // if
209 }
210
[e45215c]211 void CodeGenerator::printDesignators( std::list< Expression * > & designators ) {
212 typedef std::list< Expression * > DesignatorList;
213 if ( designators.size() == 0 ) return;
214 for ( DesignatorList::iterator iter = designators.begin(); iter != designators.end(); ++iter ) {
[8a4da06]215 if ( dynamic_cast< NameExpr * >( *iter ) ) {
[f32c7f4]216 // if expression is a name, then initializing aggregate member
217 output << ".";
218 (*iter)->accept( *this );
219 } else {
220 // if not a simple name, it has to be a constant expression, i.e. an array designator
[e45215c]221 output << "[";
222 (*iter)->accept( *this );
223 output << "]";
224 }
225 }
226 output << " = ";
227 }
228
[6c4ff37]229 void CodeGenerator::visit( SingleInit *init ) {
[e45215c]230 printDesignators( init->get_designators() );
[51587aa]231 init->get_value()->accept( *this );
232 }
233
[6c4ff37]234 void CodeGenerator::visit( ListInit *init ) {
[e45215c]235 printDesignators( init->get_designators() );
[6c4ff37]236 output << "{ ";
[5b40f30]237 if ( init->begin_initializers() == init->end_initializers() ) {
238 // illegal to leave initializer list empty for scalar initializers,
239 // but always legal to have 0
240 output << "0";
241 } else {
242 genCommaList( init->begin_initializers(), init->end_initializers() );
243 }
[6c4ff37]244 output << " }";
[51587aa]245 }
246
[71f4e4f]247 void CodeGenerator::visit( Constant *constant ) {
[6c4ff37]248 output << constant->get_value() ;
[51587aa]249 }
250
251 //*** Expressions
[6c4ff37]252 void CodeGenerator::visit( ApplicationExpr *applicationExpr ) {
[e04ef3a]253 extension( applicationExpr );
[51587aa]254 if ( VariableExpr *varExpr = dynamic_cast< VariableExpr* >( applicationExpr->get_function() ) ) {
255 OperatorInfo opInfo;
256 if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( varExpr->get_var()->get_name(), opInfo ) ) {
257 std::list< Expression* >::iterator arg = applicationExpr->get_args().begin();
258 switch ( opInfo.type ) {
259 case OT_PREFIXASSIGN:
260 case OT_POSTFIXASSIGN:
261 case OT_INFIXASSIGN:
[356189a]262 case OT_CTOR:
[c2ce2350]263 case OT_DTOR:
[51587aa]264 {
265 assert( arg != applicationExpr->get_args().end() );
266 if ( AddressExpr *addrExpr = dynamic_cast< AddressExpr * >( *arg ) ) {
[356189a]267 // remove & from first assignment/ctor argument
[51587aa]268 *arg = addrExpr->get_arg();
269 } else {
[356189a]270 // no address-of operator, so must be a pointer - add dereference
[51587aa]271 UntypedExpr *newExpr = new UntypedExpr( new NameExpr( "*?" ) );
272 newExpr->get_args().push_back( *arg );
[10a7775]273 assert( (*arg)->get_results().size() == 1 );
274 Type * type = InitTweak::getPointerBase( (*arg)->get_results().front() );
275 assert( type );
276 newExpr->get_results().push_back( type );
[51587aa]277 *arg = newExpr;
278 } // if
279 break;
280 }
[71f4e4f]281
[51587aa]282 default:
283 // do nothing
284 ;
285 }
[71f4e4f]286
[51587aa]287 switch ( opInfo.type ) {
288 case OT_INDEX:
289 assert( applicationExpr->get_args().size() == 2 );
290 (*arg++)->accept( *this );
[6c4ff37]291 output << "[";
[51587aa]292 (*arg)->accept( *this );
[6c4ff37]293 output << "]";
[51587aa]294 break;
[71f4e4f]295
[51587aa]296 case OT_CALL:
[356189a]297 // there are no intrinsic definitions of the function call operator
[51587aa]298 assert( false );
299 break;
[71f4e4f]300
[f1e012b]301 case OT_CTOR:
[c2ce2350]302 case OT_DTOR:
[356189a]303 if ( applicationExpr->get_args().size() == 1 ) {
[c2ce2350]304 // the expression fed into a single parameter constructor or destructor
[64071c2]305 // may contain side effects, so must still output this expression
306 output << "(";
[356189a]307 (*arg++)->accept( *this );
[64071c2]308 output << ") /* " << opInfo.inputName << " */";
[356189a]309 } else if ( applicationExpr->get_args().size() == 2 ) {
[c2ce2350]310 // intrinsic two parameter constructors are essentially bitwise assignment
[356189a]311 output << "(";
312 (*arg++)->accept( *this );
313 output << opInfo.symbol;
314 (*arg)->accept( *this );
[c2ce2350]315 output << ") /* " << opInfo.inputName << " */";
[356189a]316 } else {
[c2ce2350]317 // no constructors with 0 or more than 2 parameters
[356189a]318 assert( false );
319 }
320 break;
[f1e012b]321
[51587aa]322 case OT_PREFIX:
323 case OT_PREFIXASSIGN:
324 assert( applicationExpr->get_args().size() == 1 );
[6c4ff37]325 output << "(";
326 output << opInfo.symbol;
[51587aa]327 (*arg)->accept( *this );
[6c4ff37]328 output << ")";
[51587aa]329 break;
[71f4e4f]330
[51587aa]331 case OT_POSTFIX:
332 case OT_POSTFIXASSIGN:
333 assert( applicationExpr->get_args().size() == 1 );
334 (*arg)->accept( *this );
[6c4ff37]335 output << opInfo.symbol;
[51587aa]336 break;
337
[f1e012b]338
[51587aa]339 case OT_INFIX:
340 case OT_INFIXASSIGN:
341 assert( applicationExpr->get_args().size() == 2 );
[6c4ff37]342 output << "(";
[51587aa]343 (*arg++)->accept( *this );
[6c4ff37]344 output << opInfo.symbol;
[51587aa]345 (*arg)->accept( *this );
[6c4ff37]346 output << ")";
[51587aa]347 break;
[71f4e4f]348
[51587aa]349 case OT_CONSTANT:
[721f17a]350 case OT_LABELADDRESS:
351 // there are no intrinsic definitions of 0/1 or label addresses as functions
[51587aa]352 assert( false );
353 }
[17cd4eb]354 } else {
[51587aa]355 varExpr->accept( *this );
[6c4ff37]356 output << "(";
[51587aa]357 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]358 output << ")";
[17cd4eb]359 } // if
[51587aa]360 } else {
361 applicationExpr->get_function()->accept( *this );
[6c4ff37]362 output << "(";
[51587aa]363 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]364 output << ")";
[51587aa]365 } // if
366 }
[71f4e4f]367
[6c4ff37]368 void CodeGenerator::visit( UntypedExpr *untypedExpr ) {
[e04ef3a]369 extension( untypedExpr );
[51587aa]370 if ( NameExpr *nameExpr = dynamic_cast< NameExpr* >( untypedExpr->get_function() ) ) {
371 OperatorInfo opInfo;
372 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
373 std::list< Expression* >::iterator arg = untypedExpr->get_args().begin();
374 switch ( opInfo.type ) {
375 case OT_INDEX:
376 assert( untypedExpr->get_args().size() == 2 );
377 (*arg++)->accept( *this );
[6c4ff37]378 output << "[";
[51587aa]379 (*arg)->accept( *this );
[6c4ff37]380 output << "]";
[51587aa]381 break;
[71f4e4f]382
[51587aa]383 case OT_CALL:
[f1e012b]384 assert( false );
385
[c2ce2350]386
387 case OT_CTOR:
388 case OT_DTOR:
389 if ( untypedExpr->get_args().size() == 1 ) {
390 // the expression fed into a single parameter constructor or destructor
[64071c2]391 // may contain side effects, so must still output this expression
392 output << "(";
[c2ce2350]393 (*arg++)->accept( *this );
[64071c2]394 output << ") /* " << opInfo.inputName << " */";
[c2ce2350]395 } else if ( untypedExpr->get_args().size() == 2 ) {
396 // intrinsic two parameter constructors are essentially bitwise assignment
397 output << "(";
398 (*arg++)->accept( *this );
399 output << opInfo.symbol;
400 (*arg)->accept( *this );
401 output << ") /* " << opInfo.inputName << " */";
402 } else {
403 // no constructors with 0 or more than 2 parameters
404 assert( false );
405 }
[51587aa]406 break;
[71f4e4f]407
[51587aa]408 case OT_PREFIX:
409 case OT_PREFIXASSIGN:
[de62360d]410 case OT_LABELADDRESS:
[51587aa]411 assert( untypedExpr->get_args().size() == 1 );
[6c4ff37]412 output << "(";
413 output << opInfo.symbol;
[51587aa]414 (*arg)->accept( *this );
[6c4ff37]415 output << ")";
[51587aa]416 break;
[71f4e4f]417
[51587aa]418 case OT_POSTFIX:
419 case OT_POSTFIXASSIGN:
420 assert( untypedExpr->get_args().size() == 1 );
421 (*arg)->accept( *this );
[6c4ff37]422 output << opInfo.symbol;
[51587aa]423 break;
[71f4e4f]424
[51587aa]425 case OT_INFIX:
426 case OT_INFIXASSIGN:
427 assert( untypedExpr->get_args().size() == 2 );
[6c4ff37]428 output << "(";
[51587aa]429 (*arg++)->accept( *this );
[6c4ff37]430 output << opInfo.symbol;
[51587aa]431 (*arg)->accept( *this );
[6c4ff37]432 output << ")";
[51587aa]433 break;
[71f4e4f]434
[51587aa]435 case OT_CONSTANT:
436 // there are no intrinsic definitions of 0 or 1 as functions
437 assert( false );
438 }
439 } else {
440 nameExpr->accept( *this );
[6c4ff37]441 output << "(";
[51587aa]442 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
[6c4ff37]443 output << ")";
[51587aa]444 } // if
445 } else {
446 untypedExpr->get_function()->accept( *this );
[6c4ff37]447 output << "(";
[51587aa]448 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
[6c4ff37]449 output << ")";
[51587aa]450 } // if
451 }
[71f4e4f]452
[6c4ff37]453 void CodeGenerator::visit( NameExpr *nameExpr ) {
[e04ef3a]454 extension( nameExpr );
[51587aa]455 OperatorInfo opInfo;
456 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
457 assert( opInfo.type == OT_CONSTANT );
[6c4ff37]458 output << opInfo.symbol;
[51587aa]459 } else {
[6c4ff37]460 output << nameExpr->get_name();
[51587aa]461 } // if
462 }
[71f4e4f]463
[6c4ff37]464 void CodeGenerator::visit( AddressExpr *addressExpr ) {
[e04ef3a]465 extension( addressExpr );
[6c4ff37]466 output << "(&";
[51587aa]467 // this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address
468 if ( VariableExpr *variableExpr = dynamic_cast< VariableExpr* >( addressExpr->get_arg() ) ) {
[6c4ff37]469 output << mangleName( variableExpr->get_var() );
[51587aa]470 } else {
471 addressExpr->get_arg()->accept( *this );
472 } // if
[6c4ff37]473 output << ")";
[51587aa]474 }
475
[6c4ff37]476 void CodeGenerator::visit( CastExpr *castExpr ) {
[e04ef3a]477 extension( castExpr );
[803deb1]478 output << "(";
479 if ( castExpr->get_results().empty() ) {
480 output << "(void)" ;
481 } else if ( ! castExpr->get_results().front()->get_isLvalue() ) {
482 // at least one result type of cast, but not an lvalue
483 output << "(";
484 output << genType( castExpr->get_results().front(), "" );
[71f4e4f]485 output << ")";
[803deb1]486 } else {
487 // otherwise, the cast is to an lvalue type, so the cast
488 // should be dropped, since the result of a cast is
489 // never an lvalue in C
[76b48f1]490 }
[803deb1]491 castExpr->get_arg()->accept( *this );
492 output << ")";
[51587aa]493 }
[71f4e4f]494
[6c4ff37]495 void CodeGenerator::visit( UntypedMemberExpr *memberExpr ) {
[51587aa]496 assert( false );
497 }
[71f4e4f]498
[6c4ff37]499 void CodeGenerator::visit( MemberExpr *memberExpr ) {
[e04ef3a]500 extension( memberExpr );
[51587aa]501 memberExpr->get_aggregate()->accept( *this );
[6c4ff37]502 output << "." << mangleName( memberExpr->get_member() );
[51587aa]503 }
[71f4e4f]504
[6c4ff37]505 void CodeGenerator::visit( VariableExpr *variableExpr ) {
[e04ef3a]506 extension( variableExpr );
[51587aa]507 OperatorInfo opInfo;
508 if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) {
[6c4ff37]509 output << opInfo.symbol;
[51587aa]510 } else {
[6c4ff37]511 output << mangleName( variableExpr->get_var() );
[51587aa]512 } // if
513 }
[71f4e4f]514
[6c4ff37]515 void CodeGenerator::visit( ConstantExpr *constantExpr ) {
[51587aa]516 assert( constantExpr->get_constant() );
[e04ef3a]517 extension( constantExpr );
[51587aa]518 constantExpr->get_constant()->accept( *this );
519 }
[71f4e4f]520
[6c4ff37]521 void CodeGenerator::visit( SizeofExpr *sizeofExpr ) {
[e04ef3a]522 extension( sizeofExpr );
[6c4ff37]523 output << "sizeof(";
[51587aa]524 if ( sizeofExpr->get_isType() ) {
[6c4ff37]525 output << genType( sizeofExpr->get_type(), "" );
[51587aa]526 } else {
527 sizeofExpr->get_expr()->accept( *this );
528 } // if
[6c4ff37]529 output << ")";
[51587aa]530 }
[47534159]531
[25a054f]532 void CodeGenerator::visit( AlignofExpr *alignofExpr ) {
[e04ef3a]533 extension( alignofExpr );
[47534159]534 // use GCC extension to avoid bumping std to C11
535 output << "__alignof__(";
[25a054f]536 if ( alignofExpr->get_isType() ) {
537 output << genType( alignofExpr->get_type(), "" );
[47534159]538 } else {
[25a054f]539 alignofExpr->get_expr()->accept( *this );
[47534159]540 } // if
541 output << ")";
542 }
[71f4e4f]543
[2a4b088]544 void CodeGenerator::visit( UntypedOffsetofExpr *offsetofExpr ) {
[afc1045]545 assert( false && "UntypedOffsetofExpr should not reach code generation" );
[2a4b088]546 }
547
[25a054f]548 void CodeGenerator::visit( OffsetofExpr *offsetofExpr ) {
[e04ef3a]549 extension( offsetofExpr );
[25a054f]550 // use GCC builtin
551 output << "__builtin_offsetof(";
552 output << genType( offsetofExpr->get_type(), "" );
[e551c69]553 output << ", " << mangleName( offsetofExpr->get_member() );
[25a054f]554 output << ")";
555 }
[d63eeb0]556
[afc1045]557 void CodeGenerator::visit( OffsetPackExpr *offsetPackExpr ) {
558 assert( false && "OffsetPackExpr should not reach code generation" );
559 }
[70a06f6]560
[6c4ff37]561 void CodeGenerator::visit( LogicalExpr *logicalExpr ) {
[e04ef3a]562 extension( logicalExpr );
[6c4ff37]563 output << "(";
[51587aa]564 logicalExpr->get_arg1()->accept( *this );
565 if ( logicalExpr->get_isAnd() ) {
[6c4ff37]566 output << " && ";
[51587aa]567 } else {
[6c4ff37]568 output << " || ";
[51587aa]569 } // if
570 logicalExpr->get_arg2()->accept( *this );
[6c4ff37]571 output << ")";
[51587aa]572 }
[71f4e4f]573
[6c4ff37]574 void CodeGenerator::visit( ConditionalExpr *conditionalExpr ) {
[e04ef3a]575 extension( conditionalExpr );
[6c4ff37]576 output << "(";
[51587aa]577 conditionalExpr->get_arg1()->accept( *this );
[6c4ff37]578 output << " ? ";
[51587aa]579 conditionalExpr->get_arg2()->accept( *this );
[6c4ff37]580 output << " : ";
[51587aa]581 conditionalExpr->get_arg3()->accept( *this );
[6c4ff37]582 output << ")";
[51587aa]583 }
[71f4e4f]584
[6c4ff37]585 void CodeGenerator::visit( CommaExpr *commaExpr ) {
[e04ef3a]586 extension( commaExpr );
[6c4ff37]587 output << "(";
[51587aa]588 commaExpr->get_arg1()->accept( *this );
[6c4ff37]589 output << " , ";
[51587aa]590 commaExpr->get_arg2()->accept( *this );
[6c4ff37]591 output << ")";
[51587aa]592 }
[71f4e4f]593
[6c4ff37]594 void CodeGenerator::visit( TupleExpr *tupleExpr ) {}
[71f4e4f]595
[6c4ff37]596 void CodeGenerator::visit( TypeExpr *typeExpr ) {}
[2b6c1e0]597
[7f5566b]598 void CodeGenerator::visit( AsmExpr *asmExpr ) {
[e04ef3a]599 extension( asmExpr );
[7f5566b]600 if ( asmExpr->get_inout() ) {
601 output << "[ ";
602 asmExpr->get_inout()->accept( *this );
603 output << " ] ";
604 } // if
605 asmExpr->get_constraint()->accept( *this );
606 output << " ( ";
607 asmExpr->get_operand()->accept( *this );
608 output << " )";
609 }
610
[51587aa]611 //*** Statements
[6c4ff37]612 void CodeGenerator::visit( CompoundStmt *compoundStmt ) {
[51587aa]613 std::list<Statement*> ks = compoundStmt->get_kids();
[2b6c1e0]614 output << "{" << endl;
[51587aa]615
[2b6c1e0]616 cur_indent += CodeGenerator::tabsize;
[51587aa]617
[7f5566b]618 for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) {
[cda48b6]619 output << indent << printLabels( (*i)->get_labels() );
[7f5566b]620 (*i)->accept( *this );
[2b6c1e0]621
[6c4ff37]622 output << endl;
[2b6c1e0]623 if ( wantSpacing( *i ) ) {
624 output << endl;
625 }
[51587aa]626 }
[71f4e4f]627 cur_indent -= CodeGenerator::tabsize;
[51587aa]628
[cda48b6]629 output << indent << "}";
[51587aa]630 }
631
[6c4ff37]632 void CodeGenerator::visit( ExprStmt *exprStmt ) {
633 assert( exprStmt );
[321a2481]634 // cast the top-level expression to void to reduce gcc warnings.
635 Expression * expr = new CastExpr( exprStmt->get_expr() );
636 expr->accept( *this );
637 output << ";";
[51587aa]638 }
639
[7f5566b]640 void CodeGenerator::visit( AsmStmt *asmStmt ) {
641 output << "asm ";
642 if ( asmStmt->get_voltile() ) output << "volatile ";
643 if ( ! asmStmt->get_gotolabels().empty() ) output << "goto ";
644 output << "( ";
645 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
646 output << " : ";
647 genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() );
648 output << " : ";
649 genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() );
650 output << " : ";
651 genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() );
652 if ( ! asmStmt->get_gotolabels().empty() ) {
653 output << " : ";
654 for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) {
655 output << *begin++;
656 if ( begin == asmStmt->get_gotolabels().end() ) break;
657 output << ", ";
658 } // for
659 } // if
660 output << " );" ;
661 }
662
[6c4ff37]663 void CodeGenerator::visit( IfStmt *ifStmt ) {
[7f5566b]664 output << "if ( ";
665 ifStmt->get_condition()->accept( *this );
666 output << " ) ";
[51587aa]667
[7f5566b]668 ifStmt->get_thenPart()->accept( *this );
[51587aa]669
670 if ( ifStmt->get_elsePart() != 0) {
[2b6c1e0]671 output << " else ";
[7f5566b]672 ifStmt->get_elsePart()->accept( *this );
[51587aa]673 } // if
674 }
675
[6c4ff37]676 void CodeGenerator::visit( SwitchStmt *switchStmt ) {
[7f5566b]677 output << "switch ( " ;
678 switchStmt->get_condition()->accept( *this );
679 output << " ) ";
[71f4e4f]680
[2b6c1e0]681 output << "{" << std::endl;
[6c4ff37]682 cur_indent += CodeGenerator::tabsize;
[51587aa]683
[6c4ff37]684 acceptAll( switchStmt->get_branches(), *this );
[51587aa]685
[6c4ff37]686 cur_indent -= CodeGenerator::tabsize;
[51587aa]687
[cda48b6]688 output << indent << "}";
[51587aa]689 }
690
[6c4ff37]691 void CodeGenerator::visit( CaseStmt *caseStmt ) {
[cda48b6]692 output << indent;
[eb3261f]693 if ( caseStmt->isDefault()) {
[2b6c1e0]694 output << "default";
[eb3261f]695 } else {
[2b6c1e0]696 output << "case ";
[7f5566b]697 caseStmt->get_condition()->accept( *this );
[17cd4eb]698 } // if
[6c4ff37]699 output << ":\n";
[71f4e4f]700
[51587aa]701 std::list<Statement *> sts = caseStmt->get_statements();
702
[6c4ff37]703 cur_indent += CodeGenerator::tabsize;
[51587aa]704 for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) {
[cda48b6]705 output << indent << printLabels( (*i)->get_labels() ) ;
[7f5566b]706 (*i)->accept( *this );
[6c4ff37]707 output << endl;
[51587aa]708 }
[6c4ff37]709 cur_indent -= CodeGenerator::tabsize;
[51587aa]710 }
711
[6c4ff37]712 void CodeGenerator::visit( BranchStmt *branchStmt ) {
[51587aa]713 switch ( branchStmt->get_type()) {
714 case BranchStmt::Goto:
715 if ( ! branchStmt->get_target().empty() )
[6c4ff37]716 output << "goto " << branchStmt->get_target();
[71f4e4f]717 else {
[51587aa]718 if ( branchStmt->get_computedTarget() != 0 ) {
[6c4ff37]719 output << "goto *";
[51587aa]720 branchStmt->get_computedTarget()->accept( *this );
721 } // if
722 } // if
723 break;
724 case BranchStmt::Break:
[6c4ff37]725 output << "break";
[51587aa]726 break;
727 case BranchStmt::Continue:
[6c4ff37]728 output << "continue";
[51587aa]729 break;
730 }
[2b6c1e0]731 output << ";";
[51587aa]732 }
733
734
[6c4ff37]735 void CodeGenerator::visit( ReturnStmt *returnStmt ) {
736 output << "return ";
[51587aa]737
738 // xxx -- check for null expression;
739 if ( returnStmt->get_expr() ) {
740 returnStmt->get_expr()->accept( *this );
741 } // if
[6c4ff37]742 output << ";";
[51587aa]743 }
744
[6c4ff37]745 void CodeGenerator::visit( WhileStmt *whileStmt ) {
[321a2481]746 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]747 output << "do" ;
[321a2481]748 } else {
[6c4ff37]749 output << "while (" ;
[7f5566b]750 whileStmt->get_condition()->accept( *this );
[6c4ff37]751 output << ")";
[51587aa]752 } // if
[2b6c1e0]753 output << " ";
[51587aa]754
[2b6c1e0]755 output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() );
[51587aa]756 whileStmt->get_body()->accept( *this );
757
[cda48b6]758 output << indent;
[51587aa]759
760 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]761 output << " while (" ;
[7f5566b]762 whileStmt->get_condition()->accept( *this );
[6c4ff37]763 output << ");";
[51587aa]764 } // if
765 }
766
[6c4ff37]767 void CodeGenerator::visit( ForStmt *forStmt ) {
[71f4e4f]768 // initialization is always hoisted, so don't
769 // bother doing anything with that
[145f1fc]770 output << "for (;";
[51587aa]771
[321a2481]772 if ( forStmt->get_condition() != 0 ) {
[51587aa]773 forStmt->get_condition()->accept( *this );
[321a2481]774 }
[6c4ff37]775 output << ";";
[51587aa]776
[321a2481]777 if ( forStmt->get_increment() != 0 ) {
778 // cast the top-level expression to void to reduce gcc warnings.
779 Expression * expr = new CastExpr( forStmt->get_increment() );
780 expr->accept( *this );
781 }
[2b6c1e0]782 output << ") ";
[51587aa]783
784 if ( forStmt->get_body() != 0 ) {
[2b6c1e0]785 output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() );
[51587aa]786 forStmt->get_body()->accept( *this );
787 } // if
788 }
789
[6c4ff37]790 void CodeGenerator::visit( NullStmt *nullStmt ) {
[cda48b6]791 //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() );
[6c4ff37]792 output << "/* null statement */ ;";
[51587aa]793 }
794
[6c4ff37]795 void CodeGenerator::visit( DeclStmt *declStmt ) {
[51587aa]796 declStmt->get_decl()->accept( *this );
[71f4e4f]797
[51587aa]798 if ( doSemicolon( declStmt->get_decl() ) ) {
[6c4ff37]799 output << ";";
[51587aa]800 } // if
801 }
802
[6c4ff37]803 std::string CodeGenerator::printLabels( std::list< Label > &l ) {
[51587aa]804 std::string str( "" );
[6c4ff37]805 l.unique(); // assumes a sorted list. Why not use set?
[51587aa]806
807 for ( std::list< Label >::iterator i = l.begin(); i != l.end(); i++ )
808 str += *i + ": ";
809
810 return str;
811 }
812
[6c4ff37]813 void CodeGenerator::handleStorageClass( Declaration *decl ) {
[51587aa]814 switch ( decl->get_storageClass() ) {
[68cd1ce]815 case DeclarationNode::Extern:
[6c4ff37]816 output << "extern ";
[51587aa]817 break;
[68cd1ce]818 case DeclarationNode::Static:
[6c4ff37]819 output << "static ";
[51587aa]820 break;
[68cd1ce]821 case DeclarationNode::Auto:
[51587aa]822 // silently drop storage class
823 break;
[68cd1ce]824 case DeclarationNode::Register:
[6c4ff37]825 output << "register ";
[51587aa]826 break;
[68cd1ce]827 case DeclarationNode::Inline:
[de62360d]828 output << "inline ";
[f38c8d9]829 break;
[68cd1ce]830 case DeclarationNode::Fortran:
831 output << "fortran ";
832 break;
833 case DeclarationNode::Noreturn:
834 output << "_Noreturn ";
835 break;
836 case DeclarationNode::Threadlocal:
837 output << "_Thread_local ";
838 break;
839 case DeclarationNode::NoStorageClass:
[f38c8d9]840 break;
[843054c2]841 } // switch
[51587aa]842 }
[51b73452]843} // namespace CodeGen
[51587aa]844
845// Local Variables: //
846// tab-width: 4 //
847// mode: c++ //
848// compile-command: "make install" //
849// End: //
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