source: src/CodeGen/CodeGenerator.cc@ 0db6fc0

ADT aaron-thesis arm-eh ast-experimental cleanup-dtors deferred_resn demangler enum forall-pointer-decay jacob/cs343-translation jenkins-sandbox 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 0db6fc0 was 01b9928, checked in by Rob Schluntz <rschlunt@…>, 8 years ago

permit empty initializer lists [fixes #12]
  • Property mode set to 100644
File size: 30.3 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
[6e300d9]11// Last Modified By : Andrew Beach
[c850687]12// Last Modified On : Wed May 10 14:45:00 2017
[29cf9c8]13// Update Count : 484
[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
[58dd019]62 void CodeGenerator::asmName( DeclarationWithType * decl ) {
63 if ( ConstantExpr * asmName = decl->get_asmName() ) {
64 output << " asm ( " << asmName->get_constant()->get_value() << " )";
65 } // if
66 } // extension
67
[888cbe4]68 ostream & CodeGenerator::Indenter::operator()( ostream & output ) const {
[cda48b6]69 return output << string( cg.cur_indent, ' ' );
70 }
71
[888cbe4]72 ostream & operator<<( ostream & output, const CodeGenerator::Indenter &indent ) {
[cda48b6]73 return indent( output );
74 }
[51587aa]75
[888cbe4]76 CodeGenerator::LabelPrinter & CodeGenerator::LabelPrinter::operator()( std::list< Label > & l ) {
77 labels = &l;
78 return *this;
79 }
80
[8688ce1]81 ostream & operator<<( ostream & output, CodeGenerator::LabelPrinter & printLabels ) {
[888cbe4]82 std::list< Label > & labs = *printLabels.labels;
83 // l.unique(); // assumes a sorted list. Why not use set? Does order matter?
84 for ( Label & l : labs ) {
85 output << l.get_name() + ": ";
86 printLabels.cg.genAttributes( l.get_attributes() );
[8688ce1]87 } // for
[888cbe4]88 return output;
89 }
90
[c850687]91 CodeGenerator::LineMarker::LineMarker(
92 CodeLocation const & loc, bool toPrint) :
93 loc(loc), toPrint(toPrint)
94 {}
95
96 CodeGenerator::LineMarker CodeGenerator::lineDirective(
97 BaseSyntaxNode const * node) {
98 return LineMarker(node->location, lineMarks);
99 }
100
101 std::ostream & operator<<(std::ostream & out,
102 CodeGenerator::LineMarker const & marker) {
103 if (marker.toPrint && marker.loc.isSet()) {
104 return out << "\n# " << marker.loc.linenumber << " \""
105 << marker.loc.filename << "\"\n";
106 } else if (marker.toPrint) {
107 return out << "\n/* Missing CodeLocation */\n";
108 } else {
109 return out;
110 }
111 }
112
113 CodeGenerator::CodeGenerator( std::ostream & os, bool pretty, bool genC, bool lineMarks ) : indent( *this), cur_indent( 0 ), insideFunction( false ), output( os ), printLabels( *this ), pretty( pretty ), genC( genC ), lineMarks( lineMarks ) {}
[cda48b6]114
[8688ce1]115 CodeGenerator::CodeGenerator( std::ostream & os, std::string init, int indentation, bool infunp )
[888cbe4]116 : indent( *this), cur_indent( indentation ), insideFunction( infunp ), output( os ), printLabels( *this ) {
[6c4ff37]117 //output << std::string( init );
[51587aa]118 }
119
[8688ce1]120 CodeGenerator::CodeGenerator( std::ostream & os, char * init, int indentation, bool infunp )
[888cbe4]121 : indent( *this ), cur_indent( indentation ), insideFunction( infunp ), output( os ), printLabels( *this ) {
[6c4ff37]122 //output << std::string( init );
[51587aa]123 }
124
[486341f]125 string CodeGenerator::mangleName( DeclarationWithType * decl ) {
[35b1bf4]126 if ( pretty ) return decl->get_name();
[51587aa]127 if ( decl->get_mangleName() != "" ) {
[f326f99]128 // need to incorporate scope level in order to differentiate names for destructors
129 return decl->get_scopedMangleName();
[51587aa]130 } else {
131 return decl->get_name();
132 } // if
133 }
[94b4364]134
[44a81853]135 void CodeGenerator::genAttributes( list< Attribute * > & attributes ) {
136 if ( attributes.empty() ) return;
137 output << "__attribute__ ((";
138 for ( list< Attribute * >::iterator attr( attributes.begin() );; ) {
139 output << (*attr)->get_name();
140 if ( ! (*attr)->get_parameters().empty() ) {
141 output << "(";
142 genCommaList( (*attr)->get_parameters().begin(), (*attr)->get_parameters().end() );
143 output << ")";
144 } // if
145 if ( ++attr == attributes.end() ) break;
146 output << ","; // separator
147 } // for
148 output << ")) ";
149 } // CodeGenerator::genAttributes
[7baed7d]150
151
[4810867]152 // *** Declarations
[8688ce1]153 void CodeGenerator::visit( FunctionDecl * functionDecl ) {
[8e9cbb2]154 extension( functionDecl );
[7baed7d]155 genAttributes( functionDecl->get_attributes() );
156
[51587aa]157 handleStorageClass( functionDecl );
[6e8bd43]158 functionDecl->get_funcSpec().print( output );
[dd020c0]159
[e39241b]160 output << genType( functionDecl->get_functionType(), mangleName( functionDecl ), pretty, genC );
[51587aa]161
[58dd019]162 asmName( functionDecl );
163
[51587aa]164 // acceptAll( functionDecl->get_oldDecls(), *this );
165 if ( functionDecl->get_statements() ) {
[7f5566b]166 functionDecl->get_statements()->accept( *this );
[51587aa]167 } // if
168 }
169
[8688ce1]170 void CodeGenerator::visit( ObjectDecl * objectDecl ) {
[e39241b]171 if (objectDecl->get_name().empty() && genC ) {
172 // only generate an anonymous name when generating C code, otherwise it clutters the output too much
[d9c8a59]173 static UniqueName name = { "__anonymous_object" };
174 objectDecl->set_name( name.newName() );
175 }
176
[8e9cbb2]177 extension( objectDecl );
[f9cebb5]178 genAttributes( objectDecl->get_attributes() );
179
[51587aa]180 handleStorageClass( objectDecl );
[e39241b]181 output << genType( objectDecl->get_type(), mangleName( objectDecl ), pretty, genC );
[71f4e4f]182
[58dd019]183 asmName( objectDecl );
184
[51587aa]185 if ( objectDecl->get_init() ) {
[6c4ff37]186 output << " = ";
[51587aa]187 objectDecl->get_init()->accept( *this );
188 } // if
[3778cb2]189
[51587aa]190 if ( objectDecl->get_bitfieldWidth() ) {
[6c4ff37]191 output << ":";
[51587aa]192 objectDecl->get_bitfieldWidth()->accept( *this );
193 } // if
194 }
195
[5f642e38]196 void CodeGenerator::handleAggregate( AggregateDecl * aggDecl, const std::string & kind ) {
[c0aa336]197 genAttributes( aggDecl->get_attributes() );
[35b1bf4]198
[e39241b]199 if( ! aggDecl->get_parameters().empty() && ! genC ) {
200 // assertf( ! genC, "Aggregate type parameters should not reach code generation." );
201 output << "forall(";
202 genCommaList( aggDecl->get_parameters().begin(), aggDecl->get_parameters().end() );
203 output << ")" << endl;
204 }
205
[29cf9c8]206 output << kind;
[51587aa]207 if ( aggDecl->get_name() != "" )
[6c4ff37]208 output << aggDecl->get_name();
[71f4e4f]209
[2c57025]210 if ( aggDecl->has_body() ) {
211 std::list< Declaration * > & memb = aggDecl->get_members();
[94b4364]212 output << " {" << endl;
[51587aa]213
[71f4e4f]214 cur_indent += CodeGenerator::tabsize;
[3778cb2]215 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++ ) {
[4810867]216 output << lineDirective( *i ) << indent;
[7f5566b]217 (*i)->accept( *this );
[6c4ff37]218 output << ";" << endl;
[3778cb2]219 } // for
[51587aa]220
[71f4e4f]221 cur_indent -= CodeGenerator::tabsize;
[51587aa]222
[cda48b6]223 output << indent << "}";
[17cd4eb]224 } // if
[51587aa]225 }
[17cd4eb]226
[8688ce1]227 void CodeGenerator::visit( StructDecl * structDecl ) {
[8e9cbb2]228 extension( structDecl );
[5f642e38]229 handleAggregate( structDecl, "struct " );
[51587aa]230 }
[17cd4eb]231
[8688ce1]232 void CodeGenerator::visit( UnionDecl * unionDecl ) {
[8e9cbb2]233 extension( unionDecl );
[5f642e38]234 handleAggregate( unionDecl, "union " );
[51587aa]235 }
[71f4e4f]236
[8688ce1]237 void CodeGenerator::visit( EnumDecl * enumDecl ) {
[8e9cbb2]238 extension( enumDecl );
[4810867]239 output << lineDirective ( enumDecl );
[6c4ff37]240 output << "enum ";
[c0aa336]241 genAttributes( enumDecl->get_attributes() );
[51587aa]242
[8e9cbb2]243 if ( enumDecl->get_name() != "" )
244 output << enumDecl->get_name();
[71f4e4f]245
[8e9cbb2]246 std::list< Declaration* > &memb = enumDecl->get_members();
[51587aa]247
248 if ( ! memb.empty() ) {
[cda48b6]249 output << " {" << endl;
[51587aa]250
[71f4e4f]251 cur_indent += CodeGenerator::tabsize;
[51587aa]252 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) {
[8688ce1]253 ObjectDecl * obj = dynamic_cast< ObjectDecl* >( *i );
[51587aa]254 assert( obj );
[4810867]255 output << lineDirective( obj ) << indent << mangleName( obj );
[51587aa]256 if ( obj->get_init() ) {
[6c4ff37]257 output << " = ";
[7f5566b]258 obj->get_init()->accept( *this );
[51587aa]259 } // if
[6c4ff37]260 output << "," << endl;
[51587aa]261 } // for
262
[71f4e4f]263 cur_indent -= CodeGenerator::tabsize;
[51587aa]264
[cda48b6]265 output << indent << "}";
[51587aa]266 } // if
267 }
[71f4e4f]268
[8688ce1]269 void CodeGenerator::visit( TraitDecl * traitDecl ) {}
[71f4e4f]270
[8688ce1]271 void CodeGenerator::visit( TypedefDecl * typeDecl ) {
[e39241b]272 assertf( ! genC, "Typedefs are removed and substituted in earlier passes." );
[4810867]273 output << lineDirective( typeDecl );
[e39241b]274 output << "typedef ";
275 output << genType( typeDecl->get_base(), typeDecl->get_name(), pretty, genC ) << endl;
[51587aa]276 }
[71f4e4f]277
[8688ce1]278 void CodeGenerator::visit( TypeDecl * typeDecl ) {
[e39241b]279 if ( genC ) {
280 // really, we should mutate this into something that isn't a TypeDecl but that requires large-scale changes,
281 // still to be done
282 extension( typeDecl );
283 output << "extern unsigned long " << typeDecl->get_name();
284 if ( typeDecl->get_base() ) {
285 output << " = sizeof( " << genType( typeDecl->get_base(), "", pretty, genC ) << " )";
286 } // if
287 } else {
[bdd0755]288 output << typeDecl->genTypeString() << " " << typeDecl->get_name();
289 if ( typeDecl->get_kind() != TypeDecl::Any && typeDecl->get_sized() ) {
290 output << " | sized(" << typeDecl->get_name() << ")";
291 }
[e39241b]292 if ( ! typeDecl->get_assertions().empty() ) {
293 output << " | { ";
294 genCommaList( typeDecl->get_assertions().begin(), typeDecl->get_assertions().end() );
295 output << " }";
296 }
297 }
[51587aa]298 }
299
[e45215c]300 void CodeGenerator::printDesignators( std::list< Expression * > & designators ) {
301 typedef std::list< Expression * > DesignatorList;
302 if ( designators.size() == 0 ) return;
303 for ( DesignatorList::iterator iter = designators.begin(); iter != designators.end(); ++iter ) {
[8a4da06]304 if ( dynamic_cast< NameExpr * >( *iter ) ) {
[f32c7f4]305 // if expression is a name, then initializing aggregate member
306 output << ".";
307 (*iter)->accept( *this );
308 } else {
309 // if not a simple name, it has to be a constant expression, i.e. an array designator
[e45215c]310 output << "[";
311 (*iter)->accept( *this );
312 output << "]";
[3778cb2]313 } // if
314 } // for
[e45215c]315 output << " = ";
316 }
317
[8688ce1]318 void CodeGenerator::visit( SingleInit * init ) {
[e45215c]319 printDesignators( init->get_designators() );
[51587aa]320 init->get_value()->accept( *this );
321 }
322
[8688ce1]323 void CodeGenerator::visit( ListInit * init ) {
[e45215c]324 printDesignators( init->get_designators() );
[6c4ff37]325 output << "{ ";
[01b9928]326 genCommaList( init->begin(), init->end() );
[6c4ff37]327 output << " }";
[51587aa]328 }
329
[fc638d2]330 void CodeGenerator::visit( ConstructorInit * init ){
[e39241b]331 assertf( ! genC, "ConstructorInit nodes should not reach code generation." );
332 // xxx - generate something reasonable for constructor/destructor pairs
333 output << "<ctorinit>";
[fc638d2]334 }
335
[8688ce1]336 void CodeGenerator::visit( Constant * constant ) {
[6c4ff37]337 output << constant->get_value() ;
[51587aa]338 }
339
[4810867]340 // *** Expressions
[8688ce1]341 void CodeGenerator::visit( ApplicationExpr * applicationExpr ) {
[e04ef3a]342 extension( applicationExpr );
[8688ce1]343 if ( VariableExpr * varExpr = dynamic_cast< VariableExpr* >( applicationExpr->get_function() ) ) {
[51587aa]344 OperatorInfo opInfo;
345 if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( varExpr->get_var()->get_name(), opInfo ) ) {
346 std::list< Expression* >::iterator arg = applicationExpr->get_args().begin();
347 switch ( opInfo.type ) {
348 case OT_PREFIXASSIGN:
349 case OT_POSTFIXASSIGN:
350 case OT_INFIXASSIGN:
[356189a]351 case OT_CTOR:
[c2ce2350]352 case OT_DTOR:
[51587aa]353 {
354 assert( arg != applicationExpr->get_args().end() );
[8688ce1]355 if ( AddressExpr * addrExpr = dynamic_cast< AddressExpr * >( *arg ) ) {
[356189a]356 // remove & from first assignment/ctor argument
[51587aa]357 *arg = addrExpr->get_arg();
358 } else {
[356189a]359 // no address-of operator, so must be a pointer - add dereference
[066d77a]360 // NOTE: if the assertion starts to trigger, check that the application expr isn't being shared.
361 // Since its arguments are modified here, this assertion most commonly triggers when the application
362 // is visited multiple times.
[8688ce1]363 UntypedExpr * newExpr = new UntypedExpr( new NameExpr( "*?" ) );
[51587aa]364 newExpr->get_args().push_back( *arg );
[906e24d]365 Type * type = InitTweak::getPointerBase( (*arg)->get_result() );
[066d77a]366 assertf( type, "First argument to a derefence must be a pointer. Ensure that expressions are not being shared." );
[906e24d]367 newExpr->set_result( type->clone() );
[51587aa]368 *arg = newExpr;
369 } // if
370 break;
371 }
[71f4e4f]372
[51587aa]373 default:
374 // do nothing
375 ;
[3778cb2]376 } // switch
[71f4e4f]377
[51587aa]378 switch ( opInfo.type ) {
379 case OT_INDEX:
380 assert( applicationExpr->get_args().size() == 2 );
381 (*arg++)->accept( *this );
[6c4ff37]382 output << "[";
[51587aa]383 (*arg)->accept( *this );
[6c4ff37]384 output << "]";
[51587aa]385 break;
[71f4e4f]386
[51587aa]387 case OT_CALL:
[356189a]388 // there are no intrinsic definitions of the function call operator
[51587aa]389 assert( false );
390 break;
[71f4e4f]391
[f1e012b]392 case OT_CTOR:
[c2ce2350]393 case OT_DTOR:
[356189a]394 if ( applicationExpr->get_args().size() == 1 ) {
[8e9cbb2]395 // the expression fed into a single parameter constructor or destructor may contain side
396 // effects, so must still output this expression
[64071c2]397 output << "(";
[356189a]398 (*arg++)->accept( *this );
[64071c2]399 output << ") /* " << opInfo.inputName << " */";
[356189a]400 } else if ( applicationExpr->get_args().size() == 2 ) {
[c2ce2350]401 // intrinsic two parameter constructors are essentially bitwise assignment
[356189a]402 output << "(";
403 (*arg++)->accept( *this );
404 output << opInfo.symbol;
405 (*arg)->accept( *this );
[c2ce2350]406 output << ") /* " << opInfo.inputName << " */";
[356189a]407 } else {
[c2ce2350]408 // no constructors with 0 or more than 2 parameters
[356189a]409 assert( false );
[8688ce1]410 } // if
[356189a]411 break;
[f1e012b]412
[51587aa]413 case OT_PREFIX:
414 case OT_PREFIXASSIGN:
415 assert( applicationExpr->get_args().size() == 1 );
[6c4ff37]416 output << "(";
417 output << opInfo.symbol;
[51587aa]418 (*arg)->accept( *this );
[6c4ff37]419 output << ")";
[51587aa]420 break;
[71f4e4f]421
[51587aa]422 case OT_POSTFIX:
423 case OT_POSTFIXASSIGN:
424 assert( applicationExpr->get_args().size() == 1 );
425 (*arg)->accept( *this );
[6c4ff37]426 output << opInfo.symbol;
[51587aa]427 break;
428
[f1e012b]429
[51587aa]430 case OT_INFIX:
431 case OT_INFIXASSIGN:
432 assert( applicationExpr->get_args().size() == 2 );
[6c4ff37]433 output << "(";
[51587aa]434 (*arg++)->accept( *this );
[6c4ff37]435 output << opInfo.symbol;
[51587aa]436 (*arg)->accept( *this );
[6c4ff37]437 output << ")";
[51587aa]438 break;
[71f4e4f]439
[51587aa]440 case OT_CONSTANT:
[721f17a]441 case OT_LABELADDRESS:
442 // there are no intrinsic definitions of 0/1 or label addresses as functions
[51587aa]443 assert( false );
[3778cb2]444 } // switch
[17cd4eb]445 } else {
[51587aa]446 varExpr->accept( *this );
[6c4ff37]447 output << "(";
[51587aa]448 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]449 output << ")";
[17cd4eb]450 } // if
[51587aa]451 } else {
452 applicationExpr->get_function()->accept( *this );
[6c4ff37]453 output << "(";
[51587aa]454 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]455 output << ")";
[51587aa]456 } // if
457 }
[71f4e4f]458
[8688ce1]459 void CodeGenerator::visit( UntypedExpr * untypedExpr ) {
[e04ef3a]460 extension( untypedExpr );
[8688ce1]461 if ( NameExpr * nameExpr = dynamic_cast< NameExpr* >( untypedExpr->get_function() ) ) {
[51587aa]462 OperatorInfo opInfo;
463 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
464 std::list< Expression* >::iterator arg = untypedExpr->get_args().begin();
465 switch ( opInfo.type ) {
466 case OT_INDEX:
467 assert( untypedExpr->get_args().size() == 2 );
468 (*arg++)->accept( *this );
[6c4ff37]469 output << "[";
[51587aa]470 (*arg)->accept( *this );
[6c4ff37]471 output << "]";
[51587aa]472 break;
[71f4e4f]473
[51587aa]474 case OT_CALL:
[f1e012b]475 assert( false );
476
[c2ce2350]477 case OT_CTOR:
478 case OT_DTOR:
479 if ( untypedExpr->get_args().size() == 1 ) {
[8e9cbb2]480 // the expression fed into a single parameter constructor or destructor may contain side
481 // effects, so must still output this expression
[64071c2]482 output << "(";
[c2ce2350]483 (*arg++)->accept( *this );
[64071c2]484 output << ") /* " << opInfo.inputName << " */";
[c2ce2350]485 } else if ( untypedExpr->get_args().size() == 2 ) {
486 // intrinsic two parameter constructors are essentially bitwise assignment
487 output << "(";
488 (*arg++)->accept( *this );
489 output << opInfo.symbol;
490 (*arg)->accept( *this );
491 output << ") /* " << opInfo.inputName << " */";
492 } else {
493 // no constructors with 0 or more than 2 parameters
494 assert( false );
[3778cb2]495 } // if
[51587aa]496 break;
[71f4e4f]497
[51587aa]498 case OT_PREFIX:
499 case OT_PREFIXASSIGN:
[de62360d]500 case OT_LABELADDRESS:
[51587aa]501 assert( untypedExpr->get_args().size() == 1 );
[6c4ff37]502 output << "(";
503 output << opInfo.symbol;
[51587aa]504 (*arg)->accept( *this );
[6c4ff37]505 output << ")";
[51587aa]506 break;
[71f4e4f]507
[51587aa]508 case OT_POSTFIX:
509 case OT_POSTFIXASSIGN:
510 assert( untypedExpr->get_args().size() == 1 );
511 (*arg)->accept( *this );
[6c4ff37]512 output << opInfo.symbol;
[51587aa]513 break;
[71f4e4f]514
[51587aa]515 case OT_INFIX:
516 case OT_INFIXASSIGN:
517 assert( untypedExpr->get_args().size() == 2 );
[6c4ff37]518 output << "(";
[51587aa]519 (*arg++)->accept( *this );
[6c4ff37]520 output << opInfo.symbol;
[51587aa]521 (*arg)->accept( *this );
[6c4ff37]522 output << ")";
[51587aa]523 break;
[71f4e4f]524
[51587aa]525 case OT_CONSTANT:
526 // there are no intrinsic definitions of 0 or 1 as functions
527 assert( false );
[3778cb2]528 } // switch
[51587aa]529 } else {
[8688ce1]530 if ( nameExpr->get_name() == "..." ) { // case V1 ... V2 or case V1~V2
[ac911f4]531 assert( untypedExpr->get_args().size() == 2 );
532 (*untypedExpr->get_args().begin())->accept( *this );
533 output << " ... ";
534 (*--untypedExpr->get_args().end())->accept( *this );
[057b34f]535 } else { // builtin routines
536 nameExpr->accept( *this );
537 output << "(";
538 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
539 output << ")";
[66d12f7]540 } // if
[51587aa]541 } // if
542 } else {
543 untypedExpr->get_function()->accept( *this );
[6c4ff37]544 output << "(";
[51587aa]545 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
[6c4ff37]546 output << ")";
[51587aa]547 } // if
548 }
[71f4e4f]549
[064e3ff]550 void CodeGenerator::visit( RangeExpr * rangeExpr ) {
551 rangeExpr->get_low()->accept( *this );
552 output << " ... ";
553 rangeExpr->get_high()->accept( *this );
554 }
555
[8688ce1]556 void CodeGenerator::visit( NameExpr * nameExpr ) {
[e04ef3a]557 extension( nameExpr );
[51587aa]558 OperatorInfo opInfo;
559 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
560 assert( opInfo.type == OT_CONSTANT );
[6c4ff37]561 output << opInfo.symbol;
[51587aa]562 } else {
[6c4ff37]563 output << nameExpr->get_name();
[51587aa]564 } // if
565 }
[71f4e4f]566
[8688ce1]567 void CodeGenerator::visit( AddressExpr * addressExpr ) {
[e04ef3a]568 extension( addressExpr );
[6c4ff37]569 output << "(&";
[51587aa]570 // this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address
[8688ce1]571 if ( VariableExpr * variableExpr = dynamic_cast< VariableExpr* >( addressExpr->get_arg() ) ) {
[6c4ff37]572 output << mangleName( variableExpr->get_var() );
[51587aa]573 } else {
574 addressExpr->get_arg()->accept( *this );
575 } // if
[6c4ff37]576 output << ")";
[51587aa]577 }
578
[8688ce1]579 void CodeGenerator::visit( CastExpr * castExpr ) {
[e04ef3a]580 extension( castExpr );
[803deb1]581 output << "(";
[906e24d]582 if ( castExpr->get_result()->isVoid() ) {
[803deb1]583 output << "(void)" ;
[615a096]584 } else if ( ! castExpr->get_result()->get_lvalue() ) {
[803deb1]585 // at least one result type of cast, but not an lvalue
586 output << "(";
[e39241b]587 output << genType( castExpr->get_result(), "", pretty, genC );
[71f4e4f]588 output << ")";
[803deb1]589 } else {
[8e9cbb2]590 // otherwise, the cast is to an lvalue type, so the cast should be dropped, since the result of a cast is
[803deb1]591 // never an lvalue in C
[3778cb2]592 } // if
[803deb1]593 castExpr->get_arg()->accept( *this );
594 output << ")";
[51587aa]595 }
[71f4e4f]596
[8688ce1]597 void CodeGenerator::visit( UntypedMemberExpr * memberExpr ) {
[e39241b]598 assertf( ! genC, "UntypedMemberExpr should not reach code generation." );
599 extension( memberExpr );
600 memberExpr->get_aggregate()->accept( *this );
[5f642e38]601 output << ".";
602 memberExpr->get_member()->accept( *this );
[51587aa]603 }
[71f4e4f]604
[8688ce1]605 void CodeGenerator::visit( MemberExpr * memberExpr ) {
[e04ef3a]606 extension( memberExpr );
[51587aa]607 memberExpr->get_aggregate()->accept( *this );
[6c4ff37]608 output << "." << mangleName( memberExpr->get_member() );
[51587aa]609 }
[71f4e4f]610
[8688ce1]611 void CodeGenerator::visit( VariableExpr * variableExpr ) {
[e04ef3a]612 extension( variableExpr );
[51587aa]613 OperatorInfo opInfo;
614 if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) {
[6c4ff37]615 output << opInfo.symbol;
[51587aa]616 } else {
[6c4ff37]617 output << mangleName( variableExpr->get_var() );
[51587aa]618 } // if
619 }
[71f4e4f]620
[8688ce1]621 void CodeGenerator::visit( ConstantExpr * constantExpr ) {
[51587aa]622 assert( constantExpr->get_constant() );
[e04ef3a]623 extension( constantExpr );
[51587aa]624 constantExpr->get_constant()->accept( *this );
625 }
[71f4e4f]626
[8688ce1]627 void CodeGenerator::visit( SizeofExpr * sizeofExpr ) {
[e04ef3a]628 extension( sizeofExpr );
[6c4ff37]629 output << "sizeof(";
[51587aa]630 if ( sizeofExpr->get_isType() ) {
[e39241b]631 output << genType( sizeofExpr->get_type(), "", pretty, genC );
[51587aa]632 } else {
633 sizeofExpr->get_expr()->accept( *this );
634 } // if
[6c4ff37]635 output << ")";
[51587aa]636 }
[47534159]637
[8688ce1]638 void CodeGenerator::visit( AlignofExpr * alignofExpr ) {
[47534159]639 // use GCC extension to avoid bumping std to C11
[8e9cbb2]640 extension( alignofExpr );
[47534159]641 output << "__alignof__(";
[25a054f]642 if ( alignofExpr->get_isType() ) {
[e39241b]643 output << genType( alignofExpr->get_type(), "", pretty, genC );
[47534159]644 } else {
[25a054f]645 alignofExpr->get_expr()->accept( *this );
[47534159]646 } // if
647 output << ")";
648 }
[71f4e4f]649
[8688ce1]650 void CodeGenerator::visit( UntypedOffsetofExpr * offsetofExpr ) {
[e39241b]651 assertf( ! genC, "UntypedOffsetofExpr should not reach code generation." );
652 output << "offsetof(";
653 output << genType( offsetofExpr->get_type(), "", pretty, genC );
654 output << ", " << offsetofExpr->get_member();
655 output << ")";
[2a4b088]656 }
657
[8688ce1]658 void CodeGenerator::visit( OffsetofExpr * offsetofExpr ) {
[25a054f]659 // use GCC builtin
660 output << "__builtin_offsetof(";
[e39241b]661 output << genType( offsetofExpr->get_type(), "", pretty, genC );
[e551c69]662 output << ", " << mangleName( offsetofExpr->get_member() );
[25a054f]663 output << ")";
664 }
[d63eeb0]665
[8688ce1]666 void CodeGenerator::visit( OffsetPackExpr * offsetPackExpr ) {
[e39241b]667 assertf( ! genC, "OffsetPackExpr should not reach code generation." );
668 output << "__CFA_offsetpack(" << genType( offsetPackExpr->get_type(), "", pretty, genC ) << ")";
[afc1045]669 }
[70a06f6]670
[8688ce1]671 void CodeGenerator::visit( LogicalExpr * logicalExpr ) {
[e04ef3a]672 extension( logicalExpr );
[6c4ff37]673 output << "(";
[51587aa]674 logicalExpr->get_arg1()->accept( *this );
675 if ( logicalExpr->get_isAnd() ) {
[6c4ff37]676 output << " && ";
[51587aa]677 } else {
[6c4ff37]678 output << " || ";
[51587aa]679 } // if
680 logicalExpr->get_arg2()->accept( *this );
[6c4ff37]681 output << ")";
[51587aa]682 }
[71f4e4f]683
[8688ce1]684 void CodeGenerator::visit( ConditionalExpr * conditionalExpr ) {
[e04ef3a]685 extension( conditionalExpr );
[6c4ff37]686 output << "(";
[51587aa]687 conditionalExpr->get_arg1()->accept( *this );
[6c4ff37]688 output << " ? ";
[51587aa]689 conditionalExpr->get_arg2()->accept( *this );
[6c4ff37]690 output << " : ";
[51587aa]691 conditionalExpr->get_arg3()->accept( *this );
[6c4ff37]692 output << ")";
[51587aa]693 }
[71f4e4f]694
[8688ce1]695 void CodeGenerator::visit( CommaExpr * commaExpr ) {
[e04ef3a]696 extension( commaExpr );
[6c4ff37]697 output << "(";
[51587aa]698 commaExpr->get_arg1()->accept( *this );
[6c4ff37]699 output << " , ";
[51587aa]700 commaExpr->get_arg2()->accept( *this );
[6c4ff37]701 output << ")";
[51587aa]702 }
[71f4e4f]703
[e39241b]704 void CodeGenerator::visit( UntypedTupleExpr * tupleExpr ) {
705 assertf( ! genC, "UntypedTupleExpr should not reach code generation." );
[f975c65]706 extension( tupleExpr );
[e39241b]707 output << "[";
708 genCommaList( tupleExpr->get_exprs().begin(), tupleExpr->get_exprs().end() );
709 output << "]";
710 }
[907eccb]711
[e39241b]712 void CodeGenerator::visit( TupleExpr * tupleExpr ) {
713 assertf( ! genC, "TupleExpr should not reach code generation." );
[f975c65]714 extension( tupleExpr );
[e39241b]715 output << "[";
716 genCommaList( tupleExpr->get_exprs().begin(), tupleExpr->get_exprs().end() );
717 output << "]";
718 }
[71f4e4f]719
[f975c65]720 void CodeGenerator::visit( TupleIndexExpr * tupleExpr ) {
721 assertf( ! genC, "TupleIndexExpr should not reach code generation." );
722 extension( tupleExpr );
723 tupleExpr->get_tuple()->accept( *this );
724 output << "." << tupleExpr->get_index();
725 }
726
[e39241b]727 void CodeGenerator::visit( TypeExpr * typeExpr ) {
728 assertf( ! genC, "TypeExpr should not reach code generation." );
729 output<< genType( typeExpr->get_type(), "", pretty, genC );
730 }
[2b6c1e0]731
[8688ce1]732 void CodeGenerator::visit( AsmExpr * asmExpr ) {
[7f5566b]733 if ( asmExpr->get_inout() ) {
734 output << "[ ";
735 asmExpr->get_inout()->accept( *this );
736 output << " ] ";
737 } // if
738 asmExpr->get_constraint()->accept( *this );
739 output << " ( ";
740 asmExpr->get_operand()->accept( *this );
741 output << " )";
742 }
743
[3c13c03]744 void CodeGenerator::visit( CompoundLiteralExpr *compLitExpr ) {
[fbcde64]745 assert( compLitExpr->get_result() && dynamic_cast< ListInit * > ( compLitExpr->get_initializer() ) );
[e39241b]746 output << "(" << genType( compLitExpr->get_result(), "", pretty, genC ) << ")";
[3c13c03]747 compLitExpr->get_initializer()->accept( *this );
748 }
749
[6eb8948]750 void CodeGenerator::visit( StmtExpr * stmtExpr ) {
[3c13c03]751 std::list< Statement * > & stmts = stmtExpr->get_statements()->get_kids();
[4810867]752 output << lineDirective( stmtExpr) << "({" << std::endl;
[3c13c03]753 cur_indent += CodeGenerator::tabsize;
754 unsigned int numStmts = stmts.size();
755 unsigned int i = 0;
756 for ( Statement * stmt : stmts ) {
[4810867]757 output << lineDirective( stmt ) << indent;
758 output << printLabels( stmt->get_labels() );
[3c13c03]759 if ( i+1 == numStmts ) {
760 // last statement in a statement expression needs to be handled specially -
761 // cannot cast to void, otherwise the expression statement has no value
762 if ( ExprStmt * exprStmt = dynamic_cast< ExprStmt * >( stmt ) ) {
763 exprStmt->get_expr()->accept( *this );
764 output << ";" << endl;
765 ++i;
766 break;
767 }
768 }
769 stmt->accept( *this );
770 output << endl;
771 if ( wantSpacing( stmt ) ) {
772 output << endl;
773 } // if
774 ++i;
775 }
776 cur_indent -= CodeGenerator::tabsize;
777 output << indent << "})";
[6eb8948]778 }
779
[4810867]780 // *** Statements
[8688ce1]781 void CodeGenerator::visit( CompoundStmt * compoundStmt ) {
[51587aa]782 std::list<Statement*> ks = compoundStmt->get_kids();
[2b6c1e0]783 output << "{" << endl;
[51587aa]784
[2b6c1e0]785 cur_indent += CodeGenerator::tabsize;
[51587aa]786
[7f5566b]787 for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) {
[cda48b6]788 output << indent << printLabels( (*i)->get_labels() );
[7f5566b]789 (*i)->accept( *this );
[2b6c1e0]790
[6c4ff37]791 output << endl;
[2b6c1e0]792 if ( wantSpacing( *i ) ) {
793 output << endl;
[3778cb2]794 } // if
[8688ce1]795 } // for
[71f4e4f]796 cur_indent -= CodeGenerator::tabsize;
[51587aa]797
[cda48b6]798 output << indent << "}";
[51587aa]799 }
800
[8688ce1]801 void CodeGenerator::visit( ExprStmt * exprStmt ) {
[6c4ff37]802 assert( exprStmt );
[262f085f]803 Expression * expr = exprStmt->get_expr();
804 if ( genC ) {
805 // cast the top-level expression to void to reduce gcc warnings.
806 expr = new CastExpr( expr );
807 }
[321a2481]808 expr->accept( *this );
809 output << ";";
[51587aa]810 }
811
[8688ce1]812 void CodeGenerator::visit( AsmStmt * asmStmt ) {
[7f5566b]813 output << "asm ";
814 if ( asmStmt->get_voltile() ) output << "volatile ";
815 if ( ! asmStmt->get_gotolabels().empty() ) output << "goto ";
816 output << "( ";
817 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
818 output << " : ";
819 genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() );
820 output << " : ";
821 genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() );
822 output << " : ";
823 genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() );
824 if ( ! asmStmt->get_gotolabels().empty() ) {
825 output << " : ";
826 for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) {
827 output << *begin++;
828 if ( begin == asmStmt->get_gotolabels().end() ) break;
829 output << ", ";
830 } // for
831 } // if
832 output << " );" ;
833 }
834
[e994912]835 void CodeGenerator::visit( AsmDecl * asmDecl ) {
836 output << "asm ";
837 AsmStmt * asmStmt = asmDecl->get_stmt();
838 output << "( ";
839 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
840 output << " )" ;
841 }
842
[8688ce1]843 void CodeGenerator::visit( IfStmt * ifStmt ) {
[4810867]844 output << lineDirective( ifStmt );
[7f5566b]845 output << "if ( ";
846 ifStmt->get_condition()->accept( *this );
847 output << " ) ";
[51587aa]848
[7f5566b]849 ifStmt->get_thenPart()->accept( *this );
[51587aa]850
851 if ( ifStmt->get_elsePart() != 0) {
[2b6c1e0]852 output << " else ";
[7f5566b]853 ifStmt->get_elsePart()->accept( *this );
[51587aa]854 } // if
855 }
856
[8688ce1]857 void CodeGenerator::visit( SwitchStmt * switchStmt ) {
[4810867]858 output << lineDirective( switchStmt );
[7f5566b]859 output << "switch ( " ;
860 switchStmt->get_condition()->accept( *this );
861 output << " ) ";
[71f4e4f]862
[2b6c1e0]863 output << "{" << std::endl;
[6c4ff37]864 cur_indent += CodeGenerator::tabsize;
[8688ce1]865 acceptAll( switchStmt->get_statements(), *this );
[6c4ff37]866 cur_indent -= CodeGenerator::tabsize;
[cda48b6]867 output << indent << "}";
[51587aa]868 }
869
[8688ce1]870 void CodeGenerator::visit( CaseStmt * caseStmt ) {
[4810867]871 output << lineDirective( caseStmt );
[cda48b6]872 output << indent;
[eb3261f]873 if ( caseStmt->isDefault()) {
[2b6c1e0]874 output << "default";
[eb3261f]875 } else {
[2b6c1e0]876 output << "case ";
[7f5566b]877 caseStmt->get_condition()->accept( *this );
[17cd4eb]878 } // if
[6c4ff37]879 output << ":\n";
[71f4e4f]880
[51587aa]881 std::list<Statement *> sts = caseStmt->get_statements();
882
[6c4ff37]883 cur_indent += CodeGenerator::tabsize;
[51587aa]884 for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) {
[cda48b6]885 output << indent << printLabels( (*i)->get_labels() ) ;
[7f5566b]886 (*i)->accept( *this );
[6c4ff37]887 output << endl;
[3778cb2]888 } // for
[6c4ff37]889 cur_indent -= CodeGenerator::tabsize;
[51587aa]890 }
891
[8688ce1]892 void CodeGenerator::visit( BranchStmt * branchStmt ) {
[51587aa]893 switch ( branchStmt->get_type()) {
894 case BranchStmt::Goto:
895 if ( ! branchStmt->get_target().empty() )
[6c4ff37]896 output << "goto " << branchStmt->get_target();
[71f4e4f]897 else {
[51587aa]898 if ( branchStmt->get_computedTarget() != 0 ) {
[6c4ff37]899 output << "goto *";
[51587aa]900 branchStmt->get_computedTarget()->accept( *this );
901 } // if
902 } // if
903 break;
904 case BranchStmt::Break:
[6c4ff37]905 output << "break";
[51587aa]906 break;
907 case BranchStmt::Continue:
[6c4ff37]908 output << "continue";
[51587aa]909 break;
[3778cb2]910 } // switch
[2b6c1e0]911 output << ";";
[51587aa]912 }
913
[8688ce1]914 void CodeGenerator::visit( ReturnStmt * returnStmt ) {
[6c4ff37]915 output << "return ";
[4b2589a]916 maybeAccept( returnStmt->get_expr(), *this );
[6c4ff37]917 output << ";";
[51587aa]918 }
919
[8688ce1]920 void CodeGenerator::visit( WhileStmt * whileStmt ) {
[321a2481]921 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]922 output << "do" ;
[321a2481]923 } else {
[6c4ff37]924 output << "while (" ;
[7f5566b]925 whileStmt->get_condition()->accept( *this );
[6c4ff37]926 output << ")";
[51587aa]927 } // if
[2b6c1e0]928 output << " ";
[51587aa]929
[2b6c1e0]930 output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() );
[51587aa]931 whileStmt->get_body()->accept( *this );
932
[cda48b6]933 output << indent;
[51587aa]934
935 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]936 output << " while (" ;
[7f5566b]937 whileStmt->get_condition()->accept( *this );
[6c4ff37]938 output << ");";
[51587aa]939 } // if
940 }
941
[8688ce1]942 void CodeGenerator::visit( ForStmt * forStmt ) {
[8e9cbb2]943 // initialization is always hoisted, so don't bother doing anything with that
[145f1fc]944 output << "for (;";
[51587aa]945
[321a2481]946 if ( forStmt->get_condition() != 0 ) {
[51587aa]947 forStmt->get_condition()->accept( *this );
[3778cb2]948 } // if
[6c4ff37]949 output << ";";
[51587aa]950
[321a2481]951 if ( forStmt->get_increment() != 0 ) {
952 // cast the top-level expression to void to reduce gcc warnings.
953 Expression * expr = new CastExpr( forStmt->get_increment() );
954 expr->accept( *this );
[3778cb2]955 } // if
[2b6c1e0]956 output << ") ";
[51587aa]957
958 if ( forStmt->get_body() != 0 ) {
[2b6c1e0]959 output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() );
[51587aa]960 forStmt->get_body()->accept( *this );
961 } // if
962 }
963
[8688ce1]964 void CodeGenerator::visit( NullStmt * nullStmt ) {
[cda48b6]965 //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() );
[6c4ff37]966 output << "/* null statement */ ;";
[51587aa]967 }
968
[8688ce1]969 void CodeGenerator::visit( DeclStmt * declStmt ) {
[51587aa]970 declStmt->get_decl()->accept( *this );
[71f4e4f]971
[51587aa]972 if ( doSemicolon( declStmt->get_decl() ) ) {
[6c4ff37]973 output << ";";
[51587aa]974 } // if
975 }
976
[dd020c0]977 void CodeGenerator::handleStorageClass( DeclarationWithType * decl ) {
[fb04321]978 if ( decl->get_storageClasses().any() ) {
[6e8bd43]979 decl->get_storageClasses().print( output );
[a7c90d4]980 } // if
[dd020c0]981 } // CodeGenerator::handleStorageClass
[9facf3b]982
983 std::string genName( DeclarationWithType * decl ) {
984 CodeGen::OperatorInfo opInfo;
985 if ( operatorLookup( decl->get_name(), opInfo ) ) {
986 return opInfo.outputName;
987 } else {
988 return decl->get_name();
989 } // if
990 }
[51b73452]991} // namespace CodeGen
[51587aa]992
993// Local Variables: //
994// tab-width: 4 //
995// mode: c++ //
996// compile-command: "make install" //
997// End: //
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