source: src/CodeGen/CodeGenerator.cc@ ab60d6d

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 ab60d6d was 9e2c1f0, checked in by Rob Schluntz <rschlunt@…>, 9 years ago

Merge branch 'global-init' into ctor and add global destroy function to call destructors on global objects

Conflicts:

src/CodeGen/CodeGenerator.cc
src/InitTweak/module.mk
src/Makefile.in
src/SynTree/Declaration.h
src/SynTree/FunctionDecl.cc
src/main.cc
  • Property mode set to 100644
File size: 23.3 KB
RevLine 
[51587aa]1//
2// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
3//
4// The contents of this file are covered under the licence agreement in the
5// file "LICENCE" distributed with Cforall.
6//
[71f4e4f]7// CodeGenerator.cc --
[51587aa]8//
9// Author : Richard C. Bilson
10// Created On : Mon May 18 07:44:20 2015
[145f1fc]11// Last Modified By : Rob Schluntz
[9e2c1f0]12// Last Modified On : Fri May 06 16:01:00 2016
[d63eeb0]13// Update Count : 255
[51587aa]14//
15
[51b73452]16#include <algorithm>
17#include <iostream>
18#include <cassert>
19#include <list>
20
[68cd1ce]21#include "Parser/ParseNode.h"
22
[e8032b0]23#include "SynTree/Declaration.h"
[51b73452]24#include "SynTree/Expression.h"
25#include "SynTree/Initializer.h"
[68cd1ce]26#include "SynTree/Statement.h"
[e8032b0]27#include "SynTree/Type.h"
[51b73452]28
[d3b7937]29#include "Common/utility.h"
30#include "Common/UnimplementedError.h"
[51b73452]31
[a61fea9a]32#include "CodeGenerator.h"
[51b73452]33#include "OperatorTable.h"
34#include "GenType.h"
35
36using namespace std;
37
38namespace CodeGen {
[6c4ff37]39 int CodeGenerator::tabsize = 4;
[51587aa]40
[145f1fc]41 // the kinds of statements that would ideally be followed by whitespace
[2b6c1e0]42 bool wantSpacing( Statement * stmt) {
43 return dynamic_cast< IfStmt * >( stmt ) || dynamic_cast< CompoundStmt * >( stmt ) ||
44 dynamic_cast< WhileStmt * >( stmt ) || dynamic_cast< ForStmt * > ( stmt ) || dynamic_cast< SwitchStmt *>( stmt );
45 }
46
[cda48b6]47 ostream & CodeGenerator::Indenter::operator()( ostream & output ) {
48 return output << string( cg.cur_indent, ' ' );
49 }
50
51 ostream & operator<<( ostream & output, CodeGenerator::Indenter &indent ) {
52 return indent( output );
53 }
[51587aa]54
[7f5566b]55 CodeGenerator::CodeGenerator( std::ostream &os ) : indent( *this), cur_indent( 0 ), insideFunction( false ), output( os ) { }
[cda48b6]56
57 CodeGenerator::CodeGenerator( std::ostream &os, std::string init, int indentation, bool infunp )
[7f5566b]58 : indent( *this), cur_indent( indentation ), insideFunction( infunp ), output( os ) {
[6c4ff37]59 //output << std::string( init );
[51587aa]60 }
61
[cda48b6]62 CodeGenerator::CodeGenerator( std::ostream &os, char *init, int indentation, bool infunp )
[7f5566b]63 : indent( *this ), cur_indent( indentation ), insideFunction( infunp ), output( os ) {
[6c4ff37]64 //output << std::string( init );
[51587aa]65 }
66
67 string mangleName( DeclarationWithType *decl ) {
68 if ( decl->get_mangleName() != "" ) {
[f326f99]69 // need to incorporate scope level in order to differentiate names for destructors
70 return decl->get_scopedMangleName();
[51587aa]71 } else {
72 return decl->get_name();
73 } // if
74 }
[94b4364]75
[51587aa]76 //*** Declarations
[6c4ff37]77 void CodeGenerator::visit( FunctionDecl *functionDecl ) {
[4e24610]78 // generalize this
[03e5d14]79 FunctionDecl::Attribute attr = functionDecl->get_attribute();
80 switch ( attr.type ) {
81 case FunctionDecl::Attribute::Constructor:
82 output << "__attribute__ ((constructor";
83 if ( attr.priority != FunctionDecl::Attribute::Default ) {
84 output << "(" << attr.priority << ")";
85 }
86 output << ")) ";
[4e24610]87 break;
[03e5d14]88 case FunctionDecl::Attribute::Destructor:
89 output << "__attribute__ ((destructor";
90 if ( attr.priority != FunctionDecl::Attribute::Default ) {
91 output << "(" << attr.priority << ")";
92 }
93 output << ")) ";
[4e24610]94 break;
95 default:
96 break;
97 }
[51587aa]98 handleStorageClass( functionDecl );
[f38c8d9]99 if ( functionDecl->get_isInline() ) {
[6c4ff37]100 output << "inline ";
[f38c8d9]101 } // if
[de62360d]102 if ( functionDecl->get_isNoreturn() ) {
103 output << "_Noreturn ";
104 } // if
[6c4ff37]105 output << genType( functionDecl->get_functionType(), mangleName( functionDecl ) );
[51587aa]106
107 // how to get this to the Functype?
108 std::list< Declaration * > olds = functionDecl->get_oldDecls();
109 if ( ! olds.empty() ) {
[6c4ff37]110 output << " /* function has old declaration */";
[51587aa]111 } // if
112
113 // acceptAll( functionDecl->get_oldDecls(), *this );
114 if ( functionDecl->get_statements() ) {
[7f5566b]115 functionDecl->get_statements()->accept( *this );
[51587aa]116 } // if
117 }
118
[6c4ff37]119 void CodeGenerator::visit( ObjectDecl *objectDecl ) {
[51587aa]120 handleStorageClass( objectDecl );
[6c4ff37]121 output << genType( objectDecl->get_type(), mangleName( objectDecl ) );
[71f4e4f]122
[51587aa]123 if ( objectDecl->get_init() ) {
[6c4ff37]124 output << " = ";
[51587aa]125 objectDecl->get_init()->accept( *this );
126 } // if
127 if ( objectDecl->get_bitfieldWidth() ) {
[6c4ff37]128 output << ":";
[51587aa]129 objectDecl->get_bitfieldWidth()->accept( *this );
130 } // if
131 }
132
[6c4ff37]133 void CodeGenerator::handleAggregate( AggregateDecl *aggDecl ) {
[51587aa]134 if ( aggDecl->get_name() != "" )
[6c4ff37]135 output << aggDecl->get_name();
[71f4e4f]136
[51587aa]137 std::list< Declaration * > &memb = aggDecl->get_members();
138
139 if ( ! memb.empty() ) {
[94b4364]140 output << " {" << endl;
[51587aa]141
[71f4e4f]142 cur_indent += CodeGenerator::tabsize;
[51587aa]143 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) {
[71f4e4f]144 output << indent;
[7f5566b]145 (*i)->accept( *this );
[6c4ff37]146 output << ";" << endl;
[51587aa]147 }
148
[71f4e4f]149 cur_indent -= CodeGenerator::tabsize;
[51587aa]150
[cda48b6]151 output << indent << "}";
[17cd4eb]152 } // if
[51587aa]153 }
[17cd4eb]154
[6c4ff37]155 void CodeGenerator::visit( StructDecl *structDecl ) {
156 output << "struct ";
[51587aa]157 handleAggregate( structDecl );
158 }
[17cd4eb]159
[6c4ff37]160 void CodeGenerator::visit( UnionDecl *aggregateDecl ) {
161 output << "union ";
[51587aa]162 handleAggregate( aggregateDecl );
163 }
[71f4e4f]164
[6c4ff37]165 void CodeGenerator::visit( EnumDecl *aggDecl ) {
166 output << "enum ";
[51587aa]167
168 if ( aggDecl->get_name() != "" )
[6c4ff37]169 output << aggDecl->get_name();
[71f4e4f]170
[51587aa]171 std::list< Declaration* > &memb = aggDecl->get_members();
172
173 if ( ! memb.empty() ) {
[cda48b6]174 output << " {" << endl;
[51587aa]175
[71f4e4f]176 cur_indent += CodeGenerator::tabsize;
[51587aa]177 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) {
178 ObjectDecl *obj = dynamic_cast< ObjectDecl* >( *i );
179 assert( obj );
[71f4e4f]180 output << indent << mangleName( obj );
[51587aa]181 if ( obj->get_init() ) {
[6c4ff37]182 output << " = ";
[7f5566b]183 obj->get_init()->accept( *this );
[51587aa]184 } // if
[6c4ff37]185 output << "," << endl;
[51587aa]186 } // for
187
[71f4e4f]188 cur_indent -= CodeGenerator::tabsize;
[51587aa]189
[cda48b6]190 output << indent << "}";
[51587aa]191 } // if
192 }
[71f4e4f]193
[4040425]194 void CodeGenerator::visit( TraitDecl *aggregateDecl ) {}
[71f4e4f]195
[6c4ff37]196 void CodeGenerator::visit( TypedefDecl *typeDecl ) {
197 output << "typedef ";
198 output << genType( typeDecl->get_base(), typeDecl->get_name() );
[51587aa]199 }
[71f4e4f]200
[6c4ff37]201 void CodeGenerator::visit( TypeDecl *typeDecl ) {
[51587aa]202 // really, we should mutate this into something that isn't a TypeDecl but that requires large-scale changes,
203 // still to be done
[6c4ff37]204 output << "extern unsigned long " << typeDecl->get_name();
[51587aa]205 if ( typeDecl->get_base() ) {
[6c4ff37]206 output << " = sizeof( " << genType( typeDecl->get_base(), "" ) << " )";
[51587aa]207 } // if
208 }
209
[e45215c]210 void CodeGenerator::printDesignators( std::list< Expression * > & designators ) {
211 typedef std::list< Expression * > DesignatorList;
212 if ( designators.size() == 0 ) return;
213 for ( DesignatorList::iterator iter = designators.begin(); iter != designators.end(); ++iter ) {
[8a4da06]214 if ( dynamic_cast< NameExpr * >( *iter ) ) {
[f32c7f4]215 // if expression is a name, then initializing aggregate member
216 output << ".";
217 (*iter)->accept( *this );
218 } else {
219 // if not a simple name, it has to be a constant expression, i.e. an array designator
[e45215c]220 output << "[";
221 (*iter)->accept( *this );
222 output << "]";
223 }
224 }
225 output << " = ";
226 }
227
[6c4ff37]228 void CodeGenerator::visit( SingleInit *init ) {
[e45215c]229 printDesignators( init->get_designators() );
[51587aa]230 init->get_value()->accept( *this );
231 }
232
[6c4ff37]233 void CodeGenerator::visit( ListInit *init ) {
[e45215c]234 printDesignators( init->get_designators() );
[6c4ff37]235 output << "{ ";
[5b40f30]236 if ( init->begin_initializers() == init->end_initializers() ) {
237 // illegal to leave initializer list empty for scalar initializers,
238 // but always legal to have 0
239 output << "0";
240 } else {
241 genCommaList( init->begin_initializers(), init->end_initializers() );
242 }
[6c4ff37]243 output << " }";
[51587aa]244 }
245
[71f4e4f]246 void CodeGenerator::visit( Constant *constant ) {
[6c4ff37]247 output << constant->get_value() ;
[51587aa]248 }
249
250 //*** Expressions
[6c4ff37]251 void CodeGenerator::visit( ApplicationExpr *applicationExpr ) {
[51587aa]252 if ( VariableExpr *varExpr = dynamic_cast< VariableExpr* >( applicationExpr->get_function() ) ) {
253 OperatorInfo opInfo;
254 if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( varExpr->get_var()->get_name(), opInfo ) ) {
255 std::list< Expression* >::iterator arg = applicationExpr->get_args().begin();
256 switch ( opInfo.type ) {
257 case OT_PREFIXASSIGN:
258 case OT_POSTFIXASSIGN:
259 case OT_INFIXASSIGN:
[356189a]260 case OT_CTOR:
[c2ce2350]261 case OT_DTOR:
[51587aa]262 {
263 assert( arg != applicationExpr->get_args().end() );
264 if ( AddressExpr *addrExpr = dynamic_cast< AddressExpr * >( *arg ) ) {
[356189a]265 // remove & from first assignment/ctor argument
[51587aa]266 *arg = addrExpr->get_arg();
267 } else {
[356189a]268 // no address-of operator, so must be a pointer - add dereference
[51587aa]269 UntypedExpr *newExpr = new UntypedExpr( new NameExpr( "*?" ) );
270 newExpr->get_args().push_back( *arg );
271 *arg = newExpr;
272 } // if
273 break;
274 }
[71f4e4f]275
[51587aa]276 default:
277 // do nothing
278 ;
279 }
[71f4e4f]280
[51587aa]281 switch ( opInfo.type ) {
282 case OT_INDEX:
283 assert( applicationExpr->get_args().size() == 2 );
284 (*arg++)->accept( *this );
[6c4ff37]285 output << "[";
[51587aa]286 (*arg)->accept( *this );
[6c4ff37]287 output << "]";
[51587aa]288 break;
[71f4e4f]289
[51587aa]290 case OT_CALL:
[356189a]291 // there are no intrinsic definitions of the function call operator
[51587aa]292 assert( false );
293 break;
[71f4e4f]294
[f1e012b]295 case OT_CTOR:
[c2ce2350]296 case OT_DTOR:
[356189a]297 if ( applicationExpr->get_args().size() == 1 ) {
[c2ce2350]298 // the expression fed into a single parameter constructor or destructor
299 // may contain side effects - output as a void expression
[356189a]300 output << "((void)(";
301 (*arg++)->accept( *this );
[c2ce2350]302 output << ")) /* " << opInfo.inputName << " */";
[356189a]303 } else if ( applicationExpr->get_args().size() == 2 ) {
[c2ce2350]304 // intrinsic two parameter constructors are essentially bitwise assignment
[356189a]305 output << "(";
306 (*arg++)->accept( *this );
307 output << opInfo.symbol;
308 (*arg)->accept( *this );
[c2ce2350]309 output << ") /* " << opInfo.inputName << " */";
[356189a]310 } else {
[c2ce2350]311 // no constructors with 0 or more than 2 parameters
[356189a]312 assert( false );
313 }
314 break;
[f1e012b]315
[51587aa]316 case OT_PREFIX:
317 case OT_PREFIXASSIGN:
318 assert( applicationExpr->get_args().size() == 1 );
[6c4ff37]319 output << "(";
320 output << opInfo.symbol;
[51587aa]321 (*arg)->accept( *this );
[6c4ff37]322 output << ")";
[51587aa]323 break;
[71f4e4f]324
[51587aa]325 case OT_POSTFIX:
326 case OT_POSTFIXASSIGN:
327 assert( applicationExpr->get_args().size() == 1 );
328 (*arg)->accept( *this );
[6c4ff37]329 output << opInfo.symbol;
[51587aa]330 break;
331
[f1e012b]332
[51587aa]333 case OT_INFIX:
334 case OT_INFIXASSIGN:
335 assert( applicationExpr->get_args().size() == 2 );
[6c4ff37]336 output << "(";
[51587aa]337 (*arg++)->accept( *this );
[6c4ff37]338 output << opInfo.symbol;
[51587aa]339 (*arg)->accept( *this );
[6c4ff37]340 output << ")";
[51587aa]341 break;
[71f4e4f]342
[51587aa]343 case OT_CONSTANT:
[721f17a]344 case OT_LABELADDRESS:
345 // there are no intrinsic definitions of 0/1 or label addresses as functions
[51587aa]346 assert( false );
347 }
[17cd4eb]348 } else {
[51587aa]349 varExpr->accept( *this );
[6c4ff37]350 output << "(";
[51587aa]351 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]352 output << ")";
[17cd4eb]353 } // if
[51587aa]354 } else {
355 applicationExpr->get_function()->accept( *this );
[6c4ff37]356 output << "(";
[51587aa]357 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]358 output << ")";
[51587aa]359 } // if
360 }
[71f4e4f]361
[6c4ff37]362 void CodeGenerator::visit( UntypedExpr *untypedExpr ) {
[51587aa]363 if ( NameExpr *nameExpr = dynamic_cast< NameExpr* >( untypedExpr->get_function() ) ) {
364 OperatorInfo opInfo;
365 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
366 std::list< Expression* >::iterator arg = untypedExpr->get_args().begin();
367 switch ( opInfo.type ) {
368 case OT_INDEX:
369 assert( untypedExpr->get_args().size() == 2 );
370 (*arg++)->accept( *this );
[6c4ff37]371 output << "[";
[51587aa]372 (*arg)->accept( *this );
[6c4ff37]373 output << "]";
[51587aa]374 break;
[71f4e4f]375
[51587aa]376 case OT_CALL:
[f1e012b]377 assert( false );
378
[c2ce2350]379
380 case OT_CTOR:
381 case OT_DTOR:
382 if ( untypedExpr->get_args().size() == 1 ) {
383 // the expression fed into a single parameter constructor or destructor
384 // may contain side effects - output as a void expression
385 output << "((void)(";
386 (*arg++)->accept( *this );
387 output << ")) /* " << opInfo.inputName << " */";
388 } else if ( untypedExpr->get_args().size() == 2 ) {
389 // intrinsic two parameter constructors are essentially bitwise assignment
390 output << "(";
391 (*arg++)->accept( *this );
392 output << opInfo.symbol;
393 (*arg)->accept( *this );
394 output << ") /* " << opInfo.inputName << " */";
395 } else {
396 // no constructors with 0 or more than 2 parameters
397 assert( false );
398 }
[51587aa]399 break;
[71f4e4f]400
[51587aa]401 case OT_PREFIX:
402 case OT_PREFIXASSIGN:
[de62360d]403 case OT_LABELADDRESS:
[51587aa]404 assert( untypedExpr->get_args().size() == 1 );
[6c4ff37]405 output << "(";
406 output << opInfo.symbol;
[51587aa]407 (*arg)->accept( *this );
[6c4ff37]408 output << ")";
[51587aa]409 break;
[71f4e4f]410
[51587aa]411 case OT_POSTFIX:
412 case OT_POSTFIXASSIGN:
413 assert( untypedExpr->get_args().size() == 1 );
414 (*arg)->accept( *this );
[6c4ff37]415 output << opInfo.symbol;
[51587aa]416 break;
[71f4e4f]417
[51587aa]418 case OT_INFIX:
419 case OT_INFIXASSIGN:
420 assert( untypedExpr->get_args().size() == 2 );
[6c4ff37]421 output << "(";
[51587aa]422 (*arg++)->accept( *this );
[6c4ff37]423 output << opInfo.symbol;
[51587aa]424 (*arg)->accept( *this );
[6c4ff37]425 output << ")";
[51587aa]426 break;
[71f4e4f]427
[51587aa]428 case OT_CONSTANT:
429 // there are no intrinsic definitions of 0 or 1 as functions
430 assert( false );
431 }
432 } else {
433 nameExpr->accept( *this );
[6c4ff37]434 output << "(";
[51587aa]435 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
[6c4ff37]436 output << ")";
[51587aa]437 } // if
438 } else {
439 untypedExpr->get_function()->accept( *this );
[6c4ff37]440 output << "(";
[51587aa]441 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
[6c4ff37]442 output << ")";
[51587aa]443 } // if
444 }
[71f4e4f]445
[6c4ff37]446 void CodeGenerator::visit( NameExpr *nameExpr ) {
[51587aa]447 OperatorInfo opInfo;
448 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
449 assert( opInfo.type == OT_CONSTANT );
[6c4ff37]450 output << opInfo.symbol;
[51587aa]451 } else {
[6c4ff37]452 output << nameExpr->get_name();
[51587aa]453 } // if
454 }
[71f4e4f]455
[6c4ff37]456 void CodeGenerator::visit( AddressExpr *addressExpr ) {
457 output << "(&";
[51587aa]458 // this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address
459 if ( VariableExpr *variableExpr = dynamic_cast< VariableExpr* >( addressExpr->get_arg() ) ) {
[6c4ff37]460 output << mangleName( variableExpr->get_var() );
[51587aa]461 } else {
462 addressExpr->get_arg()->accept( *this );
463 } // if
[6c4ff37]464 output << ")";
[51587aa]465 }
466
[6c4ff37]467 void CodeGenerator::visit( CastExpr *castExpr ) {
[803deb1]468 output << "(";
469 if ( castExpr->get_results().empty() ) {
470 output << "(void)" ;
471 } else if ( ! castExpr->get_results().front()->get_isLvalue() ) {
472 // at least one result type of cast, but not an lvalue
473 output << "(";
474 output << genType( castExpr->get_results().front(), "" );
[71f4e4f]475 output << ")";
[803deb1]476 } else {
477 // otherwise, the cast is to an lvalue type, so the cast
478 // should be dropped, since the result of a cast is
479 // never an lvalue in C
[76b48f1]480 }
[803deb1]481 castExpr->get_arg()->accept( *this );
482 output << ")";
[51587aa]483 }
[71f4e4f]484
[6c4ff37]485 void CodeGenerator::visit( UntypedMemberExpr *memberExpr ) {
[51587aa]486 assert( false );
487 }
[71f4e4f]488
[6c4ff37]489 void CodeGenerator::visit( MemberExpr *memberExpr ) {
[51587aa]490 memberExpr->get_aggregate()->accept( *this );
[6c4ff37]491 output << "." << mangleName( memberExpr->get_member() );
[51587aa]492 }
[71f4e4f]493
[6c4ff37]494 void CodeGenerator::visit( VariableExpr *variableExpr ) {
[51587aa]495 OperatorInfo opInfo;
496 if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) {
[6c4ff37]497 output << opInfo.symbol;
[51587aa]498 } else {
[6c4ff37]499 output << mangleName( variableExpr->get_var() );
[51587aa]500 } // if
501 }
[71f4e4f]502
[6c4ff37]503 void CodeGenerator::visit( ConstantExpr *constantExpr ) {
[51587aa]504 assert( constantExpr->get_constant() );
505 constantExpr->get_constant()->accept( *this );
506 }
[71f4e4f]507
[6c4ff37]508 void CodeGenerator::visit( SizeofExpr *sizeofExpr ) {
509 output << "sizeof(";
[51587aa]510 if ( sizeofExpr->get_isType() ) {
[6c4ff37]511 output << genType( sizeofExpr->get_type(), "" );
[51587aa]512 } else {
513 sizeofExpr->get_expr()->accept( *this );
514 } // if
[6c4ff37]515 output << ")";
[51587aa]516 }
[47534159]517
[25a054f]518 void CodeGenerator::visit( AlignofExpr *alignofExpr ) {
[47534159]519 // use GCC extension to avoid bumping std to C11
520 output << "__alignof__(";
[25a054f]521 if ( alignofExpr->get_isType() ) {
522 output << genType( alignofExpr->get_type(), "" );
[47534159]523 } else {
[25a054f]524 alignofExpr->get_expr()->accept( *this );
[47534159]525 } // if
526 output << ")";
527 }
[71f4e4f]528
[2a4b088]529 void CodeGenerator::visit( UntypedOffsetofExpr *offsetofExpr ) {
[afc1045]530 assert( false && "UntypedOffsetofExpr should not reach code generation" );
[2a4b088]531 }
532
[25a054f]533 void CodeGenerator::visit( OffsetofExpr *offsetofExpr ) {
534 // use GCC builtin
535 output << "__builtin_offsetof(";
536 output << genType( offsetofExpr->get_type(), "" );
[e551c69]537 output << ", " << mangleName( offsetofExpr->get_member() );
[25a054f]538 output << ")";
539 }
[d63eeb0]540
[afc1045]541 void CodeGenerator::visit( OffsetPackExpr *offsetPackExpr ) {
542 assert( false && "OffsetPackExpr should not reach code generation" );
543 }
[70a06f6]544
[6c4ff37]545 void CodeGenerator::visit( LogicalExpr *logicalExpr ) {
546 output << "(";
[51587aa]547 logicalExpr->get_arg1()->accept( *this );
548 if ( logicalExpr->get_isAnd() ) {
[6c4ff37]549 output << " && ";
[51587aa]550 } else {
[6c4ff37]551 output << " || ";
[51587aa]552 } // if
553 logicalExpr->get_arg2()->accept( *this );
[6c4ff37]554 output << ")";
[51587aa]555 }
[71f4e4f]556
[6c4ff37]557 void CodeGenerator::visit( ConditionalExpr *conditionalExpr ) {
558 output << "(";
[51587aa]559 conditionalExpr->get_arg1()->accept( *this );
[6c4ff37]560 output << " ? ";
[51587aa]561 conditionalExpr->get_arg2()->accept( *this );
[6c4ff37]562 output << " : ";
[51587aa]563 conditionalExpr->get_arg3()->accept( *this );
[6c4ff37]564 output << ")";
[51587aa]565 }
[71f4e4f]566
[6c4ff37]567 void CodeGenerator::visit( CommaExpr *commaExpr ) {
568 output << "(";
[51587aa]569 commaExpr->get_arg1()->accept( *this );
[6c4ff37]570 output << " , ";
[51587aa]571 commaExpr->get_arg2()->accept( *this );
[6c4ff37]572 output << ")";
[51587aa]573 }
[71f4e4f]574
[6c4ff37]575 void CodeGenerator::visit( TupleExpr *tupleExpr ) {}
[71f4e4f]576
[6c4ff37]577 void CodeGenerator::visit( TypeExpr *typeExpr ) {}
[2b6c1e0]578
[7f5566b]579 void CodeGenerator::visit( AsmExpr *asmExpr ) {
580 if ( asmExpr->get_inout() ) {
581 output << "[ ";
582 asmExpr->get_inout()->accept( *this );
583 output << " ] ";
584 } // if
585 asmExpr->get_constraint()->accept( *this );
586 output << " ( ";
587 asmExpr->get_operand()->accept( *this );
588 output << " )";
589 }
590
[51587aa]591 //*** Statements
[6c4ff37]592 void CodeGenerator::visit( CompoundStmt *compoundStmt ) {
[51587aa]593 std::list<Statement*> ks = compoundStmt->get_kids();
[2b6c1e0]594 output << "{" << endl;
[51587aa]595
[2b6c1e0]596 cur_indent += CodeGenerator::tabsize;
[51587aa]597
[7f5566b]598 for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) {
[cda48b6]599 output << indent << printLabels( (*i)->get_labels() );
[7f5566b]600 (*i)->accept( *this );
[2b6c1e0]601
[6c4ff37]602 output << endl;
[2b6c1e0]603 if ( wantSpacing( *i ) ) {
604 output << endl;
605 }
[51587aa]606 }
[71f4e4f]607 cur_indent -= CodeGenerator::tabsize;
[51587aa]608
[cda48b6]609 output << indent << "}";
[51587aa]610 }
611
[6c4ff37]612 void CodeGenerator::visit( ExprStmt *exprStmt ) {
[71f4e4f]613 // I don't see why this check is necessary.
614 // If this starts to cause problems then put it back in,
[6c4ff37]615 // with an explanation
616 assert( exprStmt );
617
618 // if ( exprStmt != 0 ) {
619 exprStmt->get_expr()->accept( *this );
620 output << ";" ;
621 // } // if
[51587aa]622 }
623
[7f5566b]624 void CodeGenerator::visit( AsmStmt *asmStmt ) {
625 output << "asm ";
626 if ( asmStmt->get_voltile() ) output << "volatile ";
627 if ( ! asmStmt->get_gotolabels().empty() ) output << "goto ";
628 output << "( ";
629 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
630 output << " : ";
631 genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() );
632 output << " : ";
633 genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() );
634 output << " : ";
635 genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() );
636 if ( ! asmStmt->get_gotolabels().empty() ) {
637 output << " : ";
638 for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) {
639 output << *begin++;
640 if ( begin == asmStmt->get_gotolabels().end() ) break;
641 output << ", ";
642 } // for
643 } // if
644 output << " );" ;
645 }
646
[6c4ff37]647 void CodeGenerator::visit( IfStmt *ifStmt ) {
[7f5566b]648 output << "if ( ";
649 ifStmt->get_condition()->accept( *this );
650 output << " ) ";
[51587aa]651
[7f5566b]652 ifStmt->get_thenPart()->accept( *this );
[51587aa]653
654 if ( ifStmt->get_elsePart() != 0) {
[2b6c1e0]655 output << " else ";
[7f5566b]656 ifStmt->get_elsePart()->accept( *this );
[51587aa]657 } // if
658 }
659
[6c4ff37]660 void CodeGenerator::visit( SwitchStmt *switchStmt ) {
[7f5566b]661 output << "switch ( " ;
662 switchStmt->get_condition()->accept( *this );
663 output << " ) ";
[71f4e4f]664
[2b6c1e0]665 output << "{" << std::endl;
[6c4ff37]666 cur_indent += CodeGenerator::tabsize;
[51587aa]667
[6c4ff37]668 acceptAll( switchStmt->get_branches(), *this );
[51587aa]669
[6c4ff37]670 cur_indent -= CodeGenerator::tabsize;
[51587aa]671
[cda48b6]672 output << indent << "}";
[51587aa]673 }
674
[6c4ff37]675 void CodeGenerator::visit( CaseStmt *caseStmt ) {
[cda48b6]676 output << indent;
[eb3261f]677 if ( caseStmt->isDefault()) {
[2b6c1e0]678 output << "default";
[eb3261f]679 } else {
[2b6c1e0]680 output << "case ";
[7f5566b]681 caseStmt->get_condition()->accept( *this );
[17cd4eb]682 } // if
[6c4ff37]683 output << ":\n";
[71f4e4f]684
[51587aa]685 std::list<Statement *> sts = caseStmt->get_statements();
686
[6c4ff37]687 cur_indent += CodeGenerator::tabsize;
[51587aa]688 for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) {
[cda48b6]689 output << indent << printLabels( (*i)->get_labels() ) ;
[7f5566b]690 (*i)->accept( *this );
[6c4ff37]691 output << endl;
[51587aa]692 }
[6c4ff37]693 cur_indent -= CodeGenerator::tabsize;
[51587aa]694 }
695
[6c4ff37]696 void CodeGenerator::visit( BranchStmt *branchStmt ) {
[51587aa]697 switch ( branchStmt->get_type()) {
698 case BranchStmt::Goto:
699 if ( ! branchStmt->get_target().empty() )
[6c4ff37]700 output << "goto " << branchStmt->get_target();
[71f4e4f]701 else {
[51587aa]702 if ( branchStmt->get_computedTarget() != 0 ) {
[6c4ff37]703 output << "goto *";
[51587aa]704 branchStmt->get_computedTarget()->accept( *this );
705 } // if
706 } // if
707 break;
708 case BranchStmt::Break:
[6c4ff37]709 output << "break";
[51587aa]710 break;
711 case BranchStmt::Continue:
[6c4ff37]712 output << "continue";
[51587aa]713 break;
714 }
[2b6c1e0]715 output << ";";
[51587aa]716 }
717
718
[6c4ff37]719 void CodeGenerator::visit( ReturnStmt *returnStmt ) {
720 output << "return ";
[51587aa]721
722 // xxx -- check for null expression;
723 if ( returnStmt->get_expr() ) {
724 returnStmt->get_expr()->accept( *this );
725 } // if
[6c4ff37]726 output << ";";
[51587aa]727 }
728
[6c4ff37]729 void CodeGenerator::visit( WhileStmt *whileStmt ) {
[51587aa]730 if ( whileStmt->get_isDoWhile() )
[6c4ff37]731 output << "do" ;
[51587aa]732 else {
[6c4ff37]733 output << "while (" ;
[7f5566b]734 whileStmt->get_condition()->accept( *this );
[6c4ff37]735 output << ")";
[51587aa]736 } // if
[2b6c1e0]737 output << " ";
[51587aa]738
[2b6c1e0]739 output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() );
[51587aa]740 whileStmt->get_body()->accept( *this );
741
[cda48b6]742 output << indent;
[51587aa]743
744 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]745 output << " while (" ;
[7f5566b]746 whileStmt->get_condition()->accept( *this );
[6c4ff37]747 output << ");";
[51587aa]748 } // if
749 }
750
[6c4ff37]751 void CodeGenerator::visit( ForStmt *forStmt ) {
[71f4e4f]752 // initialization is always hoisted, so don't
753 // bother doing anything with that
[145f1fc]754 output << "for (;";
[51587aa]755
756 if ( forStmt->get_condition() != 0 )
757 forStmt->get_condition()->accept( *this );
[6c4ff37]758 output << ";";
[51587aa]759
760 if ( forStmt->get_increment() != 0 )
761 forStmt->get_increment()->accept( *this );
[2b6c1e0]762 output << ") ";
[51587aa]763
764 if ( forStmt->get_body() != 0 ) {
[2b6c1e0]765 output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() );
[51587aa]766 forStmt->get_body()->accept( *this );
767 } // if
768 }
769
[6c4ff37]770 void CodeGenerator::visit( NullStmt *nullStmt ) {
[cda48b6]771 //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() );
[6c4ff37]772 output << "/* null statement */ ;";
[51587aa]773 }
774
[6c4ff37]775 void CodeGenerator::visit( DeclStmt *declStmt ) {
[51587aa]776 declStmt->get_decl()->accept( *this );
[71f4e4f]777
[51587aa]778 if ( doSemicolon( declStmt->get_decl() ) ) {
[6c4ff37]779 output << ";";
[51587aa]780 } // if
781 }
782
[6c4ff37]783 std::string CodeGenerator::printLabels( std::list< Label > &l ) {
[51587aa]784 std::string str( "" );
[6c4ff37]785 l.unique(); // assumes a sorted list. Why not use set?
[51587aa]786
787 for ( std::list< Label >::iterator i = l.begin(); i != l.end(); i++ )
788 str += *i + ": ";
789
790 return str;
791 }
792
[6c4ff37]793 void CodeGenerator::handleStorageClass( Declaration *decl ) {
[51587aa]794 switch ( decl->get_storageClass() ) {
[68cd1ce]795 case DeclarationNode::Extern:
[6c4ff37]796 output << "extern ";
[51587aa]797 break;
[68cd1ce]798 case DeclarationNode::Static:
[6c4ff37]799 output << "static ";
[51587aa]800 break;
[68cd1ce]801 case DeclarationNode::Auto:
[51587aa]802 // silently drop storage class
803 break;
[68cd1ce]804 case DeclarationNode::Register:
[6c4ff37]805 output << "register ";
[51587aa]806 break;
[68cd1ce]807 case DeclarationNode::Inline:
[de62360d]808 output << "inline ";
[f38c8d9]809 break;
[68cd1ce]810 case DeclarationNode::Fortran:
811 output << "fortran ";
812 break;
813 case DeclarationNode::Noreturn:
814 output << "_Noreturn ";
815 break;
816 case DeclarationNode::Threadlocal:
817 output << "_Thread_local ";
818 break;
819 case DeclarationNode::NoStorageClass:
[f38c8d9]820 break;
[843054c2]821 } // switch
[51587aa]822 }
[51b73452]823} // namespace CodeGen
[51587aa]824
825// Local Variables: //
826// tab-width: 4 //
827// mode: c++ //
828// compile-command: "make install" //
829// End: //
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