source: src/CodeGen/CodeGenerator.cc@ 4e2a1137

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 4e2a1137 was 4819cac, checked in by Rob Schluntz <rschlunt@…>, 9 years ago

Merge branch 'master' into ctor

Conflicts:

src/CodeGen/CodeGenerator.cc
  • Property mode set to 100644
File size: 25.1 KB
RevLine 
[51587aa]1//
2// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
3//
4// The contents of this file are covered under the licence agreement in the
5// file "LICENCE" distributed with Cforall.
6//
[71f4e4f]7// CodeGenerator.cc --
[51587aa]8//
9// Author : Richard C. Bilson
10// Created On : Mon May 18 07:44:20 2015
[8688ce1]11// Last Modified By : Peter A. Buhr
12// Last Modified On : Thu Aug 4 11:16:21 2016
13// Update Count : 351
[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 ) ||
[08061589]47 dynamic_cast< WhileStmt * >( stmt ) || dynamic_cast< ForStmt * >( stmt ) || dynamic_cast< SwitchStmt *>( stmt );
[2b6c1e0]48 }
49
[8688ce1]50 void CodeGenerator::extension( Expression * expr ) {
[8e9cbb2]51 if ( expr->get_extension() ) {
52 output << "__extension__ ";
53 } // if
54 } // extension
55
[8688ce1]56 void CodeGenerator::extension( Declaration * decl ) {
[8e9cbb2]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
[8688ce1]75 ostream & operator<<( ostream & output, CodeGenerator::LabelPrinter & printLabels ) {
[888cbe4]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() );
[8688ce1]81 } // for
[888cbe4]82 return output;
83 }
84
[8688ce1]85 CodeGenerator::CodeGenerator( std::ostream & os ) : indent( *this), cur_indent( 0 ), insideFunction( false ), output( os ), printLabels( *this ) {}
[cda48b6]86
[8688ce1]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
[8688ce1]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
[8688ce1]97 string mangleName( DeclarationWithType * decl ) {
[51587aa]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 << ")";
[8688ce1]114 } // if
[7baed7d]115 output << ",";
[8688ce1]116 } // for
[7baed7d]117 output << ")) ";
[8688ce1]118 } // if
[7baed7d]119 }
120
121
122 //*** Declarations
[8688ce1]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
[8688ce1]148 void CodeGenerator::visit( ObjectDecl * objectDecl ) {
[8e9cbb2]149 extension( objectDecl );
[f9cebb5]150 genAttributes( objectDecl->get_attributes() );
151
[51587aa]152 handleStorageClass( objectDecl );
[6c4ff37]153 output << genType( objectDecl->get_type(), mangleName( objectDecl ) );
[71f4e4f]154
[51587aa]155 if ( objectDecl->get_init() ) {
[6c4ff37]156 output << " = ";
[51587aa]157 objectDecl->get_init()->accept( *this );
158 } // if
[3778cb2]159
[51587aa]160 if ( objectDecl->get_bitfieldWidth() ) {
[6c4ff37]161 output << ":";
[51587aa]162 objectDecl->get_bitfieldWidth()->accept( *this );
163 } // if
164 }
165
[8688ce1]166 void CodeGenerator::handleAggregate( AggregateDecl * aggDecl ) {
[51587aa]167 if ( aggDecl->get_name() != "" )
[6c4ff37]168 output << aggDecl->get_name();
[71f4e4f]169
[8688ce1]170 std::list< Declaration * > & memb = aggDecl->get_members();
[51587aa]171 if ( ! memb.empty() ) {
[5d125e4]172// if ( aggDecl->has_body() ) {
[8688ce1]173// std::list< Declaration * > & memb = aggDecl->get_members();
[94b4364]174 output << " {" << endl;
[51587aa]175
[71f4e4f]176 cur_indent += CodeGenerator::tabsize;
[3778cb2]177 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++ ) {
[71f4e4f]178 output << indent;
[7f5566b]179 (*i)->accept( *this );
[6c4ff37]180 output << ";" << endl;
[3778cb2]181 } // for
[51587aa]182
[71f4e4f]183 cur_indent -= CodeGenerator::tabsize;
[51587aa]184
[cda48b6]185 output << indent << "}";
[17cd4eb]186 } // if
[51587aa]187 }
[17cd4eb]188
[8688ce1]189 void CodeGenerator::visit( StructDecl * structDecl ) {
[8e9cbb2]190 extension( structDecl );
[6c4ff37]191 output << "struct ";
[51587aa]192 handleAggregate( structDecl );
193 }
[17cd4eb]194
[8688ce1]195 void CodeGenerator::visit( UnionDecl * unionDecl ) {
[8e9cbb2]196 extension( unionDecl );
[6c4ff37]197 output << "union ";
[8e9cbb2]198 handleAggregate( unionDecl );
[51587aa]199 }
[71f4e4f]200
[8688ce1]201 void CodeGenerator::visit( EnumDecl * enumDecl ) {
[8e9cbb2]202 extension( enumDecl );
[6c4ff37]203 output << "enum ";
[51587aa]204
[8e9cbb2]205 if ( enumDecl->get_name() != "" )
206 output << enumDecl->get_name();
[71f4e4f]207
[8e9cbb2]208 std::list< Declaration* > &memb = enumDecl->get_members();
[51587aa]209
210 if ( ! memb.empty() ) {
[cda48b6]211 output << " {" << endl;
[51587aa]212
[71f4e4f]213 cur_indent += CodeGenerator::tabsize;
[51587aa]214 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) {
[8688ce1]215 ObjectDecl * obj = dynamic_cast< ObjectDecl* >( *i );
[51587aa]216 assert( obj );
[71f4e4f]217 output << indent << mangleName( obj );
[51587aa]218 if ( obj->get_init() ) {
[6c4ff37]219 output << " = ";
[7f5566b]220 obj->get_init()->accept( *this );
[51587aa]221 } // if
[6c4ff37]222 output << "," << endl;
[51587aa]223 } // for
224
[71f4e4f]225 cur_indent -= CodeGenerator::tabsize;
[51587aa]226
[cda48b6]227 output << indent << "}";
[51587aa]228 } // if
229 }
[71f4e4f]230
[8688ce1]231 void CodeGenerator::visit( TraitDecl * traitDecl ) {}
[71f4e4f]232
[8688ce1]233 void CodeGenerator::visit( TypedefDecl * typeDecl ) {
[8e9cbb2]234 assert( false && "Typedefs are removed and substituted in earlier passes." );
235 //output << "typedef ";
236 //output << genType( typeDecl->get_base(), typeDecl->get_name() );
[51587aa]237 }
[71f4e4f]238
[8688ce1]239 void CodeGenerator::visit( TypeDecl * typeDecl ) {
[51587aa]240 // really, we should mutate this into something that isn't a TypeDecl but that requires large-scale changes,
241 // still to be done
[8e9cbb2]242 extension( typeDecl );
[6c4ff37]243 output << "extern unsigned long " << typeDecl->get_name();
[51587aa]244 if ( typeDecl->get_base() ) {
[6c4ff37]245 output << " = sizeof( " << genType( typeDecl->get_base(), "" ) << " )";
[51587aa]246 } // if
247 }
248
[e45215c]249 void CodeGenerator::printDesignators( std::list< Expression * > & designators ) {
250 typedef std::list< Expression * > DesignatorList;
251 if ( designators.size() == 0 ) return;
252 for ( DesignatorList::iterator iter = designators.begin(); iter != designators.end(); ++iter ) {
[8a4da06]253 if ( dynamic_cast< NameExpr * >( *iter ) ) {
[f32c7f4]254 // if expression is a name, then initializing aggregate member
255 output << ".";
256 (*iter)->accept( *this );
257 } else {
258 // if not a simple name, it has to be a constant expression, i.e. an array designator
[e45215c]259 output << "[";
260 (*iter)->accept( *this );
261 output << "]";
[3778cb2]262 } // if
263 } // for
[e45215c]264 output << " = ";
265 }
266
[8688ce1]267 void CodeGenerator::visit( SingleInit * init ) {
[e45215c]268 printDesignators( init->get_designators() );
[51587aa]269 init->get_value()->accept( *this );
270 }
271
[8688ce1]272 void CodeGenerator::visit( ListInit * init ) {
[e45215c]273 printDesignators( init->get_designators() );
[6c4ff37]274 output << "{ ";
[4d2434a]275 if ( init->begin() == init->end() ) {
[8e9cbb2]276 // illegal to leave initializer list empty for scalar initializers, but always legal to have 0
[5b40f30]277 output << "0";
278 } else {
[4d2434a]279 genCommaList( init->begin(), init->end() );
[8688ce1]280 } // if
[6c4ff37]281 output << " }";
[51587aa]282 }
283
[8688ce1]284 void CodeGenerator::visit( Constant * constant ) {
[6c4ff37]285 output << constant->get_value() ;
[51587aa]286 }
287
288 //*** Expressions
[8688ce1]289 void CodeGenerator::visit( ApplicationExpr * applicationExpr ) {
[e04ef3a]290 extension( applicationExpr );
[8688ce1]291 if ( VariableExpr * varExpr = dynamic_cast< VariableExpr* >( applicationExpr->get_function() ) ) {
[51587aa]292 OperatorInfo opInfo;
293 if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( varExpr->get_var()->get_name(), opInfo ) ) {
294 std::list< Expression* >::iterator arg = applicationExpr->get_args().begin();
295 switch ( opInfo.type ) {
296 case OT_PREFIXASSIGN:
297 case OT_POSTFIXASSIGN:
298 case OT_INFIXASSIGN:
[356189a]299 case OT_CTOR:
[c2ce2350]300 case OT_DTOR:
[51587aa]301 {
302 assert( arg != applicationExpr->get_args().end() );
[8688ce1]303 if ( AddressExpr * addrExpr = dynamic_cast< AddressExpr * >( *arg ) ) {
[356189a]304 // remove & from first assignment/ctor argument
[51587aa]305 *arg = addrExpr->get_arg();
306 } else {
[356189a]307 // no address-of operator, so must be a pointer - add dereference
[8688ce1]308 UntypedExpr * newExpr = new UntypedExpr( new NameExpr( "*?" ) );
[51587aa]309 newExpr->get_args().push_back( *arg );
[10a7775]310 assert( (*arg)->get_results().size() == 1 );
311 Type * type = InitTweak::getPointerBase( (*arg)->get_results().front() );
312 assert( type );
313 newExpr->get_results().push_back( type );
[51587aa]314 *arg = newExpr;
315 } // if
316 break;
317 }
[71f4e4f]318
[51587aa]319 default:
320 // do nothing
321 ;
[3778cb2]322 } // switch
[71f4e4f]323
[51587aa]324 switch ( opInfo.type ) {
325 case OT_INDEX:
326 assert( applicationExpr->get_args().size() == 2 );
327 (*arg++)->accept( *this );
[6c4ff37]328 output << "[";
[51587aa]329 (*arg)->accept( *this );
[6c4ff37]330 output << "]";
[51587aa]331 break;
[71f4e4f]332
[51587aa]333 case OT_CALL:
[356189a]334 // there are no intrinsic definitions of the function call operator
[51587aa]335 assert( false );
336 break;
[71f4e4f]337
[f1e012b]338 case OT_CTOR:
[c2ce2350]339 case OT_DTOR:
[356189a]340 if ( applicationExpr->get_args().size() == 1 ) {
[8e9cbb2]341 // the expression fed into a single parameter constructor or destructor may contain side
342 // effects, so must still output this expression
[64071c2]343 output << "(";
[356189a]344 (*arg++)->accept( *this );
[64071c2]345 output << ") /* " << opInfo.inputName << " */";
[356189a]346 } else if ( applicationExpr->get_args().size() == 2 ) {
[c2ce2350]347 // intrinsic two parameter constructors are essentially bitwise assignment
[356189a]348 output << "(";
349 (*arg++)->accept( *this );
350 output << opInfo.symbol;
351 (*arg)->accept( *this );
[c2ce2350]352 output << ") /* " << opInfo.inputName << " */";
[356189a]353 } else {
[c2ce2350]354 // no constructors with 0 or more than 2 parameters
[356189a]355 assert( false );
[8688ce1]356 } // if
[356189a]357 break;
[f1e012b]358
[51587aa]359 case OT_PREFIX:
360 case OT_PREFIXASSIGN:
361 assert( applicationExpr->get_args().size() == 1 );
[6c4ff37]362 output << "(";
363 output << opInfo.symbol;
[51587aa]364 (*arg)->accept( *this );
[6c4ff37]365 output << ")";
[51587aa]366 break;
[71f4e4f]367
[51587aa]368 case OT_POSTFIX:
369 case OT_POSTFIXASSIGN:
370 assert( applicationExpr->get_args().size() == 1 );
371 (*arg)->accept( *this );
[6c4ff37]372 output << opInfo.symbol;
[51587aa]373 break;
374
[f1e012b]375
[51587aa]376 case OT_INFIX:
377 case OT_INFIXASSIGN:
378 assert( applicationExpr->get_args().size() == 2 );
[6c4ff37]379 output << "(";
[51587aa]380 (*arg++)->accept( *this );
[6c4ff37]381 output << opInfo.symbol;
[51587aa]382 (*arg)->accept( *this );
[6c4ff37]383 output << ")";
[51587aa]384 break;
[71f4e4f]385
[51587aa]386 case OT_CONSTANT:
[721f17a]387 case OT_LABELADDRESS:
388 // there are no intrinsic definitions of 0/1 or label addresses as functions
[51587aa]389 assert( false );
[3778cb2]390 } // switch
[17cd4eb]391 } else {
[51587aa]392 varExpr->accept( *this );
[6c4ff37]393 output << "(";
[51587aa]394 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]395 output << ")";
[17cd4eb]396 } // if
[51587aa]397 } else {
398 applicationExpr->get_function()->accept( *this );
[6c4ff37]399 output << "(";
[51587aa]400 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]401 output << ")";
[51587aa]402 } // if
403 }
[71f4e4f]404
[8688ce1]405 void CodeGenerator::visit( UntypedExpr * untypedExpr ) {
[e04ef3a]406 extension( untypedExpr );
[8688ce1]407 if ( NameExpr * nameExpr = dynamic_cast< NameExpr* >( untypedExpr->get_function() ) ) {
[51587aa]408 OperatorInfo opInfo;
409 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
410 std::list< Expression* >::iterator arg = untypedExpr->get_args().begin();
411 switch ( opInfo.type ) {
412 case OT_INDEX:
413 assert( untypedExpr->get_args().size() == 2 );
414 (*arg++)->accept( *this );
[6c4ff37]415 output << "[";
[51587aa]416 (*arg)->accept( *this );
[6c4ff37]417 output << "]";
[51587aa]418 break;
[71f4e4f]419
[51587aa]420 case OT_CALL:
[f1e012b]421 assert( false );
422
[c2ce2350]423 case OT_CTOR:
424 case OT_DTOR:
425 if ( untypedExpr->get_args().size() == 1 ) {
[8e9cbb2]426 // the expression fed into a single parameter constructor or destructor may contain side
427 // effects, so must still output this expression
[64071c2]428 output << "(";
[c2ce2350]429 (*arg++)->accept( *this );
[64071c2]430 output << ") /* " << opInfo.inputName << " */";
[c2ce2350]431 } else if ( untypedExpr->get_args().size() == 2 ) {
432 // intrinsic two parameter constructors are essentially bitwise assignment
433 output << "(";
434 (*arg++)->accept( *this );
435 output << opInfo.symbol;
436 (*arg)->accept( *this );
437 output << ") /* " << opInfo.inputName << " */";
438 } else {
439 // no constructors with 0 or more than 2 parameters
440 assert( false );
[3778cb2]441 } // if
[51587aa]442 break;
[71f4e4f]443
[51587aa]444 case OT_PREFIX:
445 case OT_PREFIXASSIGN:
[de62360d]446 case OT_LABELADDRESS:
[51587aa]447 assert( untypedExpr->get_args().size() == 1 );
[6c4ff37]448 output << "(";
449 output << opInfo.symbol;
[51587aa]450 (*arg)->accept( *this );
[6c4ff37]451 output << ")";
[51587aa]452 break;
[71f4e4f]453
[51587aa]454 case OT_POSTFIX:
455 case OT_POSTFIXASSIGN:
456 assert( untypedExpr->get_args().size() == 1 );
457 (*arg)->accept( *this );
[6c4ff37]458 output << opInfo.symbol;
[51587aa]459 break;
[71f4e4f]460
[51587aa]461 case OT_INFIX:
462 case OT_INFIXASSIGN:
463 assert( untypedExpr->get_args().size() == 2 );
[6c4ff37]464 output << "(";
[51587aa]465 (*arg++)->accept( *this );
[6c4ff37]466 output << opInfo.symbol;
[51587aa]467 (*arg)->accept( *this );
[6c4ff37]468 output << ")";
[51587aa]469 break;
[71f4e4f]470
[51587aa]471 case OT_CONSTANT:
472 // there are no intrinsic definitions of 0 or 1 as functions
473 assert( false );
[3778cb2]474 } // switch
[51587aa]475 } else {
[8688ce1]476 if ( nameExpr->get_name() == "..." ) { // case V1 ... V2 or case V1~V2
[ac911f4]477 assert( untypedExpr->get_args().size() == 2 );
478 (*untypedExpr->get_args().begin())->accept( *this );
479 output << " ... ";
480 (*--untypedExpr->get_args().end())->accept( *this );
[057b34f]481 } else { // builtin routines
482 nameExpr->accept( *this );
483 output << "(";
484 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
485 output << ")";
[66d12f7]486 } // if
[51587aa]487 } // if
488 } else {
489 untypedExpr->get_function()->accept( *this );
[6c4ff37]490 output << "(";
[51587aa]491 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
[6c4ff37]492 output << ")";
[51587aa]493 } // if
494 }
[71f4e4f]495
[8688ce1]496 void CodeGenerator::visit( NameExpr * nameExpr ) {
[e04ef3a]497 extension( nameExpr );
[51587aa]498 OperatorInfo opInfo;
499 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
500 assert( opInfo.type == OT_CONSTANT );
[6c4ff37]501 output << opInfo.symbol;
[51587aa]502 } else {
[6c4ff37]503 output << nameExpr->get_name();
[51587aa]504 } // if
505 }
[71f4e4f]506
[8688ce1]507 void CodeGenerator::visit( AddressExpr * addressExpr ) {
[e04ef3a]508 extension( addressExpr );
[6c4ff37]509 output << "(&";
[51587aa]510 // this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address
[8688ce1]511 if ( VariableExpr * variableExpr = dynamic_cast< VariableExpr* >( addressExpr->get_arg() ) ) {
[6c4ff37]512 output << mangleName( variableExpr->get_var() );
[51587aa]513 } else {
514 addressExpr->get_arg()->accept( *this );
515 } // if
[6c4ff37]516 output << ")";
[51587aa]517 }
518
[8688ce1]519 void CodeGenerator::visit( CastExpr * castExpr ) {
[e04ef3a]520 extension( castExpr );
[803deb1]521 output << "(";
522 if ( castExpr->get_results().empty() ) {
523 output << "(void)" ;
524 } else if ( ! castExpr->get_results().front()->get_isLvalue() ) {
525 // at least one result type of cast, but not an lvalue
526 output << "(";
527 output << genType( castExpr->get_results().front(), "" );
[71f4e4f]528 output << ")";
[803deb1]529 } else {
[8e9cbb2]530 // otherwise, the cast is to an lvalue type, so the cast should be dropped, since the result of a cast is
[803deb1]531 // never an lvalue in C
[3778cb2]532 } // if
[803deb1]533 castExpr->get_arg()->accept( *this );
534 output << ")";
[51587aa]535 }
[71f4e4f]536
[8688ce1]537 void CodeGenerator::visit( UntypedMemberExpr * memberExpr ) {
[51587aa]538 assert( false );
539 }
[71f4e4f]540
[8688ce1]541 void CodeGenerator::visit( MemberExpr * memberExpr ) {
[e04ef3a]542 extension( memberExpr );
[51587aa]543 memberExpr->get_aggregate()->accept( *this );
[6c4ff37]544 output << "." << mangleName( memberExpr->get_member() );
[51587aa]545 }
[71f4e4f]546
[8688ce1]547 void CodeGenerator::visit( VariableExpr * variableExpr ) {
[e04ef3a]548 extension( variableExpr );
[51587aa]549 OperatorInfo opInfo;
550 if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) {
[6c4ff37]551 output << opInfo.symbol;
[51587aa]552 } else {
[6c4ff37]553 output << mangleName( variableExpr->get_var() );
[51587aa]554 } // if
555 }
[71f4e4f]556
[8688ce1]557 void CodeGenerator::visit( ConstantExpr * constantExpr ) {
[51587aa]558 assert( constantExpr->get_constant() );
[e04ef3a]559 extension( constantExpr );
[51587aa]560 constantExpr->get_constant()->accept( *this );
561 }
[71f4e4f]562
[8688ce1]563 void CodeGenerator::visit( SizeofExpr * sizeofExpr ) {
[e04ef3a]564 extension( sizeofExpr );
[6c4ff37]565 output << "sizeof(";
[51587aa]566 if ( sizeofExpr->get_isType() ) {
[6c4ff37]567 output << genType( sizeofExpr->get_type(), "" );
[51587aa]568 } else {
569 sizeofExpr->get_expr()->accept( *this );
570 } // if
[6c4ff37]571 output << ")";
[51587aa]572 }
[47534159]573
[8688ce1]574 void CodeGenerator::visit( AlignofExpr * alignofExpr ) {
[47534159]575 // use GCC extension to avoid bumping std to C11
[8e9cbb2]576 extension( alignofExpr );
[47534159]577 output << "__alignof__(";
[25a054f]578 if ( alignofExpr->get_isType() ) {
579 output << genType( alignofExpr->get_type(), "" );
[47534159]580 } else {
[25a054f]581 alignofExpr->get_expr()->accept( *this );
[47534159]582 } // if
583 output << ")";
584 }
[71f4e4f]585
[8688ce1]586 void CodeGenerator::visit( UntypedOffsetofExpr * offsetofExpr ) {
[8e9cbb2]587 assert( false && "UntypedOffsetofExpr should not reach code generation." );
[2a4b088]588 }
589
[8688ce1]590 void CodeGenerator::visit( OffsetofExpr * offsetofExpr ) {
[25a054f]591 // use GCC builtin
592 output << "__builtin_offsetof(";
593 output << genType( offsetofExpr->get_type(), "" );
[e551c69]594 output << ", " << mangleName( offsetofExpr->get_member() );
[25a054f]595 output << ")";
596 }
[d63eeb0]597
[8688ce1]598 void CodeGenerator::visit( OffsetPackExpr * offsetPackExpr ) {
[8e9cbb2]599 assert( false && "OffsetPackExpr should not reach code generation." );
[afc1045]600 }
[70a06f6]601
[8688ce1]602 void CodeGenerator::visit( LogicalExpr * logicalExpr ) {
[e04ef3a]603 extension( logicalExpr );
[6c4ff37]604 output << "(";
[51587aa]605 logicalExpr->get_arg1()->accept( *this );
606 if ( logicalExpr->get_isAnd() ) {
[6c4ff37]607 output << " && ";
[51587aa]608 } else {
[6c4ff37]609 output << " || ";
[51587aa]610 } // if
611 logicalExpr->get_arg2()->accept( *this );
[6c4ff37]612 output << ")";
[51587aa]613 }
[71f4e4f]614
[8688ce1]615 void CodeGenerator::visit( ConditionalExpr * conditionalExpr ) {
[e04ef3a]616 extension( conditionalExpr );
[6c4ff37]617 output << "(";
[51587aa]618 conditionalExpr->get_arg1()->accept( *this );
[6c4ff37]619 output << " ? ";
[51587aa]620 conditionalExpr->get_arg2()->accept( *this );
[6c4ff37]621 output << " : ";
[51587aa]622 conditionalExpr->get_arg3()->accept( *this );
[6c4ff37]623 output << ")";
[51587aa]624 }
[71f4e4f]625
[8688ce1]626 void CodeGenerator::visit( CommaExpr * commaExpr ) {
[e04ef3a]627 extension( commaExpr );
[6c4ff37]628 output << "(";
[51587aa]629 commaExpr->get_arg1()->accept( *this );
[6c4ff37]630 output << " , ";
[51587aa]631 commaExpr->get_arg2()->accept( *this );
[6c4ff37]632 output << ")";
[51587aa]633 }
[71f4e4f]634
[8688ce1]635 void CodeGenerator::visit( TupleExpr * tupleExpr ) {}
[71f4e4f]636
[8688ce1]637 void CodeGenerator::visit( TypeExpr * typeExpr ) {}
[2b6c1e0]638
[8688ce1]639 void CodeGenerator::visit( AsmExpr * asmExpr ) {
[7f5566b]640 if ( asmExpr->get_inout() ) {
641 output << "[ ";
642 asmExpr->get_inout()->accept( *this );
643 output << " ] ";
644 } // if
645 asmExpr->get_constraint()->accept( *this );
646 output << " ( ";
647 asmExpr->get_operand()->accept( *this );
648 output << " )";
649 }
650
[51587aa]651 //*** Statements
[8688ce1]652 void CodeGenerator::visit( CompoundStmt * compoundStmt ) {
[51587aa]653 std::list<Statement*> ks = compoundStmt->get_kids();
[2b6c1e0]654 output << "{" << endl;
[51587aa]655
[2b6c1e0]656 cur_indent += CodeGenerator::tabsize;
[51587aa]657
[7f5566b]658 for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) {
[cda48b6]659 output << indent << printLabels( (*i)->get_labels() );
[7f5566b]660 (*i)->accept( *this );
[2b6c1e0]661
[6c4ff37]662 output << endl;
[2b6c1e0]663 if ( wantSpacing( *i ) ) {
664 output << endl;
[3778cb2]665 } // if
[8688ce1]666 } // for
[71f4e4f]667 cur_indent -= CodeGenerator::tabsize;
[51587aa]668
[cda48b6]669 output << indent << "}";
[51587aa]670 }
671
[8688ce1]672 void CodeGenerator::visit( ExprStmt * exprStmt ) {
[6c4ff37]673 assert( exprStmt );
[321a2481]674 // cast the top-level expression to void to reduce gcc warnings.
675 Expression * expr = new CastExpr( exprStmt->get_expr() );
676 expr->accept( *this );
677 output << ";";
[51587aa]678 }
679
[8688ce1]680 void CodeGenerator::visit( AsmStmt * asmStmt ) {
[7f5566b]681 output << "asm ";
682 if ( asmStmt->get_voltile() ) output << "volatile ";
683 if ( ! asmStmt->get_gotolabels().empty() ) output << "goto ";
684 output << "( ";
685 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
686 output << " : ";
687 genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() );
688 output << " : ";
689 genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() );
690 output << " : ";
691 genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() );
692 if ( ! asmStmt->get_gotolabels().empty() ) {
693 output << " : ";
694 for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) {
695 output << *begin++;
696 if ( begin == asmStmt->get_gotolabels().end() ) break;
697 output << ", ";
698 } // for
699 } // if
700 output << " );" ;
701 }
702
[8688ce1]703 void CodeGenerator::visit( IfStmt * ifStmt ) {
[7f5566b]704 output << "if ( ";
705 ifStmt->get_condition()->accept( *this );
706 output << " ) ";
[51587aa]707
[7f5566b]708 ifStmt->get_thenPart()->accept( *this );
[51587aa]709
710 if ( ifStmt->get_elsePart() != 0) {
[2b6c1e0]711 output << " else ";
[7f5566b]712 ifStmt->get_elsePart()->accept( *this );
[51587aa]713 } // if
714 }
715
[8688ce1]716 void CodeGenerator::visit( SwitchStmt * switchStmt ) {
[7f5566b]717 output << "switch ( " ;
718 switchStmt->get_condition()->accept( *this );
719 output << " ) ";
[71f4e4f]720
[2b6c1e0]721 output << "{" << std::endl;
[6c4ff37]722 cur_indent += CodeGenerator::tabsize;
[8688ce1]723 acceptAll( switchStmt->get_statements(), *this );
[6c4ff37]724 cur_indent -= CodeGenerator::tabsize;
[cda48b6]725 output << indent << "}";
[51587aa]726 }
727
[8688ce1]728 void CodeGenerator::visit( CaseStmt * caseStmt ) {
[cda48b6]729 output << indent;
[eb3261f]730 if ( caseStmt->isDefault()) {
[2b6c1e0]731 output << "default";
[eb3261f]732 } else {
[2b6c1e0]733 output << "case ";
[7f5566b]734 caseStmt->get_condition()->accept( *this );
[17cd4eb]735 } // if
[6c4ff37]736 output << ":\n";
[71f4e4f]737
[51587aa]738 std::list<Statement *> sts = caseStmt->get_statements();
739
[6c4ff37]740 cur_indent += CodeGenerator::tabsize;
[51587aa]741 for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) {
[cda48b6]742 output << indent << printLabels( (*i)->get_labels() ) ;
[7f5566b]743 (*i)->accept( *this );
[6c4ff37]744 output << endl;
[3778cb2]745 } // for
[6c4ff37]746 cur_indent -= CodeGenerator::tabsize;
[51587aa]747 }
748
[8688ce1]749 void CodeGenerator::visit( BranchStmt * branchStmt ) {
[51587aa]750 switch ( branchStmt->get_type()) {
751 case BranchStmt::Goto:
752 if ( ! branchStmt->get_target().empty() )
[6c4ff37]753 output << "goto " << branchStmt->get_target();
[71f4e4f]754 else {
[51587aa]755 if ( branchStmt->get_computedTarget() != 0 ) {
[6c4ff37]756 output << "goto *";
[51587aa]757 branchStmt->get_computedTarget()->accept( *this );
758 } // if
759 } // if
760 break;
761 case BranchStmt::Break:
[6c4ff37]762 output << "break";
[51587aa]763 break;
764 case BranchStmt::Continue:
[6c4ff37]765 output << "continue";
[51587aa]766 break;
[3778cb2]767 } // switch
[2b6c1e0]768 output << ";";
[51587aa]769 }
770
771
[8688ce1]772 void CodeGenerator::visit( ReturnStmt * returnStmt ) {
[6c4ff37]773 output << "return ";
[4b2589a]774 maybeAccept( returnStmt->get_expr(), *this );
[6c4ff37]775 output << ";";
[51587aa]776 }
777
[8688ce1]778 void CodeGenerator::visit( WhileStmt * whileStmt ) {
[321a2481]779 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]780 output << "do" ;
[321a2481]781 } else {
[6c4ff37]782 output << "while (" ;
[7f5566b]783 whileStmt->get_condition()->accept( *this );
[6c4ff37]784 output << ")";
[51587aa]785 } // if
[2b6c1e0]786 output << " ";
[51587aa]787
[2b6c1e0]788 output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() );
[51587aa]789 whileStmt->get_body()->accept( *this );
790
[cda48b6]791 output << indent;
[51587aa]792
793 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]794 output << " while (" ;
[7f5566b]795 whileStmt->get_condition()->accept( *this );
[6c4ff37]796 output << ");";
[51587aa]797 } // if
798 }
799
[8688ce1]800 void CodeGenerator::visit( ForStmt * forStmt ) {
[8e9cbb2]801 // initialization is always hoisted, so don't bother doing anything with that
[145f1fc]802 output << "for (;";
[51587aa]803
[321a2481]804 if ( forStmt->get_condition() != 0 ) {
[51587aa]805 forStmt->get_condition()->accept( *this );
[3778cb2]806 } // if
[6c4ff37]807 output << ";";
[51587aa]808
[321a2481]809 if ( forStmt->get_increment() != 0 ) {
810 // cast the top-level expression to void to reduce gcc warnings.
811 Expression * expr = new CastExpr( forStmt->get_increment() );
812 expr->accept( *this );
[3778cb2]813 } // if
[2b6c1e0]814 output << ") ";
[51587aa]815
816 if ( forStmt->get_body() != 0 ) {
[2b6c1e0]817 output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() );
[51587aa]818 forStmt->get_body()->accept( *this );
819 } // if
820 }
821
[8688ce1]822 void CodeGenerator::visit( NullStmt * nullStmt ) {
[cda48b6]823 //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() );
[6c4ff37]824 output << "/* null statement */ ;";
[51587aa]825 }
826
[8688ce1]827 void CodeGenerator::visit( DeclStmt * declStmt ) {
[51587aa]828 declStmt->get_decl()->accept( *this );
[71f4e4f]829
[51587aa]830 if ( doSemicolon( declStmt->get_decl() ) ) {
[6c4ff37]831 output << ";";
[51587aa]832 } // if
833 }
834
[8688ce1]835 void CodeGenerator::handleStorageClass( Declaration * decl ) {
[51587aa]836 switch ( decl->get_storageClass() ) {
[68cd1ce]837 case DeclarationNode::Extern:
[6c4ff37]838 output << "extern ";
[51587aa]839 break;
[68cd1ce]840 case DeclarationNode::Static:
[6c4ff37]841 output << "static ";
[51587aa]842 break;
[68cd1ce]843 case DeclarationNode::Auto:
[51587aa]844 // silently drop storage class
845 break;
[68cd1ce]846 case DeclarationNode::Register:
[6c4ff37]847 output << "register ";
[51587aa]848 break;
[68cd1ce]849 case DeclarationNode::Inline:
[de62360d]850 output << "inline ";
[f38c8d9]851 break;
[68cd1ce]852 case DeclarationNode::Fortran:
853 output << "fortran ";
854 break;
855 case DeclarationNode::Noreturn:
856 output << "_Noreturn ";
857 break;
858 case DeclarationNode::Threadlocal:
859 output << "_Thread_local ";
860 break;
861 case DeclarationNode::NoStorageClass:
[f38c8d9]862 break;
[843054c2]863 } // switch
[51587aa]864 }
[51b73452]865} // namespace CodeGen
[51587aa]866
867// Local Variables: //
868// tab-width: 4 //
869// mode: c++ //
870// compile-command: "make install" //
871// End: //
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