source: src/CodeGen/CodeGenerator.cc@ db0fa7c

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 db0fa7c was f975c65, checked in by Rob Schluntz <rschlunt@…>, 8 years ago

intermediate codegen for tuple indexing
  • Property mode set to 100644
File size: 30.5 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 << "{ ";
[4d2434a]326 if ( init->begin() == init->end() ) {
[8e9cbb2]327 // illegal to leave initializer list empty for scalar initializers, but always legal to have 0
[5b40f30]328 output << "0";
329 } else {
[4d2434a]330 genCommaList( init->begin(), init->end() );
[8688ce1]331 } // if
[6c4ff37]332 output << " }";
[51587aa]333 }
334
[fc638d2]335 void CodeGenerator::visit( ConstructorInit * init ){
[e39241b]336 assertf( ! genC, "ConstructorInit nodes should not reach code generation." );
337 // xxx - generate something reasonable for constructor/destructor pairs
338 output << "<ctorinit>";
[fc638d2]339 }
340
[8688ce1]341 void CodeGenerator::visit( Constant * constant ) {
[6c4ff37]342 output << constant->get_value() ;
[51587aa]343 }
344
[4810867]345 // *** Expressions
[8688ce1]346 void CodeGenerator::visit( ApplicationExpr * applicationExpr ) {
[e04ef3a]347 extension( applicationExpr );
[8688ce1]348 if ( VariableExpr * varExpr = dynamic_cast< VariableExpr* >( applicationExpr->get_function() ) ) {
[51587aa]349 OperatorInfo opInfo;
350 if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( varExpr->get_var()->get_name(), opInfo ) ) {
351 std::list< Expression* >::iterator arg = applicationExpr->get_args().begin();
352 switch ( opInfo.type ) {
353 case OT_PREFIXASSIGN:
354 case OT_POSTFIXASSIGN:
355 case OT_INFIXASSIGN:
[356189a]356 case OT_CTOR:
[c2ce2350]357 case OT_DTOR:
[51587aa]358 {
359 assert( arg != applicationExpr->get_args().end() );
[8688ce1]360 if ( AddressExpr * addrExpr = dynamic_cast< AddressExpr * >( *arg ) ) {
[356189a]361 // remove & from first assignment/ctor argument
[51587aa]362 *arg = addrExpr->get_arg();
363 } else {
[356189a]364 // no address-of operator, so must be a pointer - add dereference
[066d77a]365 // NOTE: if the assertion starts to trigger, check that the application expr isn't being shared.
366 // Since its arguments are modified here, this assertion most commonly triggers when the application
367 // is visited multiple times.
[8688ce1]368 UntypedExpr * newExpr = new UntypedExpr( new NameExpr( "*?" ) );
[51587aa]369 newExpr->get_args().push_back( *arg );
[906e24d]370 Type * type = InitTweak::getPointerBase( (*arg)->get_result() );
[066d77a]371 assertf( type, "First argument to a derefence must be a pointer. Ensure that expressions are not being shared." );
[906e24d]372 newExpr->set_result( type->clone() );
[51587aa]373 *arg = newExpr;
374 } // if
375 break;
376 }
[71f4e4f]377
[51587aa]378 default:
379 // do nothing
380 ;
[3778cb2]381 } // switch
[71f4e4f]382
[51587aa]383 switch ( opInfo.type ) {
384 case OT_INDEX:
385 assert( applicationExpr->get_args().size() == 2 );
386 (*arg++)->accept( *this );
[6c4ff37]387 output << "[";
[51587aa]388 (*arg)->accept( *this );
[6c4ff37]389 output << "]";
[51587aa]390 break;
[71f4e4f]391
[51587aa]392 case OT_CALL:
[356189a]393 // there are no intrinsic definitions of the function call operator
[51587aa]394 assert( false );
395 break;
[71f4e4f]396
[f1e012b]397 case OT_CTOR:
[c2ce2350]398 case OT_DTOR:
[356189a]399 if ( applicationExpr->get_args().size() == 1 ) {
[8e9cbb2]400 // the expression fed into a single parameter constructor or destructor may contain side
401 // effects, so must still output this expression
[64071c2]402 output << "(";
[356189a]403 (*arg++)->accept( *this );
[64071c2]404 output << ") /* " << opInfo.inputName << " */";
[356189a]405 } else if ( applicationExpr->get_args().size() == 2 ) {
[c2ce2350]406 // intrinsic two parameter constructors are essentially bitwise assignment
[356189a]407 output << "(";
408 (*arg++)->accept( *this );
409 output << opInfo.symbol;
410 (*arg)->accept( *this );
[c2ce2350]411 output << ") /* " << opInfo.inputName << " */";
[356189a]412 } else {
[c2ce2350]413 // no constructors with 0 or more than 2 parameters
[356189a]414 assert( false );
[8688ce1]415 } // if
[356189a]416 break;
[f1e012b]417
[51587aa]418 case OT_PREFIX:
419 case OT_PREFIXASSIGN:
420 assert( applicationExpr->get_args().size() == 1 );
[6c4ff37]421 output << "(";
422 output << opInfo.symbol;
[51587aa]423 (*arg)->accept( *this );
[6c4ff37]424 output << ")";
[51587aa]425 break;
[71f4e4f]426
[51587aa]427 case OT_POSTFIX:
428 case OT_POSTFIXASSIGN:
429 assert( applicationExpr->get_args().size() == 1 );
430 (*arg)->accept( *this );
[6c4ff37]431 output << opInfo.symbol;
[51587aa]432 break;
433
[f1e012b]434
[51587aa]435 case OT_INFIX:
436 case OT_INFIXASSIGN:
437 assert( applicationExpr->get_args().size() == 2 );
[6c4ff37]438 output << "(";
[51587aa]439 (*arg++)->accept( *this );
[6c4ff37]440 output << opInfo.symbol;
[51587aa]441 (*arg)->accept( *this );
[6c4ff37]442 output << ")";
[51587aa]443 break;
[71f4e4f]444
[51587aa]445 case OT_CONSTANT:
[721f17a]446 case OT_LABELADDRESS:
447 // there are no intrinsic definitions of 0/1 or label addresses as functions
[51587aa]448 assert( false );
[3778cb2]449 } // switch
[17cd4eb]450 } else {
[51587aa]451 varExpr->accept( *this );
[6c4ff37]452 output << "(";
[51587aa]453 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]454 output << ")";
[17cd4eb]455 } // if
[51587aa]456 } else {
457 applicationExpr->get_function()->accept( *this );
[6c4ff37]458 output << "(";
[51587aa]459 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]460 output << ")";
[51587aa]461 } // if
462 }
[71f4e4f]463
[8688ce1]464 void CodeGenerator::visit( UntypedExpr * untypedExpr ) {
[e04ef3a]465 extension( untypedExpr );
[8688ce1]466 if ( NameExpr * nameExpr = dynamic_cast< NameExpr* >( untypedExpr->get_function() ) ) {
[51587aa]467 OperatorInfo opInfo;
468 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
469 std::list< Expression* >::iterator arg = untypedExpr->get_args().begin();
470 switch ( opInfo.type ) {
471 case OT_INDEX:
472 assert( untypedExpr->get_args().size() == 2 );
473 (*arg++)->accept( *this );
[6c4ff37]474 output << "[";
[51587aa]475 (*arg)->accept( *this );
[6c4ff37]476 output << "]";
[51587aa]477 break;
[71f4e4f]478
[51587aa]479 case OT_CALL:
[f1e012b]480 assert( false );
481
[c2ce2350]482 case OT_CTOR:
483 case OT_DTOR:
484 if ( untypedExpr->get_args().size() == 1 ) {
[8e9cbb2]485 // the expression fed into a single parameter constructor or destructor may contain side
486 // effects, so must still output this expression
[64071c2]487 output << "(";
[c2ce2350]488 (*arg++)->accept( *this );
[64071c2]489 output << ") /* " << opInfo.inputName << " */";
[c2ce2350]490 } else if ( untypedExpr->get_args().size() == 2 ) {
491 // intrinsic two parameter constructors are essentially bitwise assignment
492 output << "(";
493 (*arg++)->accept( *this );
494 output << opInfo.symbol;
495 (*arg)->accept( *this );
496 output << ") /* " << opInfo.inputName << " */";
497 } else {
498 // no constructors with 0 or more than 2 parameters
499 assert( false );
[3778cb2]500 } // if
[51587aa]501 break;
[71f4e4f]502
[51587aa]503 case OT_PREFIX:
504 case OT_PREFIXASSIGN:
[de62360d]505 case OT_LABELADDRESS:
[51587aa]506 assert( untypedExpr->get_args().size() == 1 );
[6c4ff37]507 output << "(";
508 output << opInfo.symbol;
[51587aa]509 (*arg)->accept( *this );
[6c4ff37]510 output << ")";
[51587aa]511 break;
[71f4e4f]512
[51587aa]513 case OT_POSTFIX:
514 case OT_POSTFIXASSIGN:
515 assert( untypedExpr->get_args().size() == 1 );
516 (*arg)->accept( *this );
[6c4ff37]517 output << opInfo.symbol;
[51587aa]518 break;
[71f4e4f]519
[51587aa]520 case OT_INFIX:
521 case OT_INFIXASSIGN:
522 assert( untypedExpr->get_args().size() == 2 );
[6c4ff37]523 output << "(";
[51587aa]524 (*arg++)->accept( *this );
[6c4ff37]525 output << opInfo.symbol;
[51587aa]526 (*arg)->accept( *this );
[6c4ff37]527 output << ")";
[51587aa]528 break;
[71f4e4f]529
[51587aa]530 case OT_CONSTANT:
531 // there are no intrinsic definitions of 0 or 1 as functions
532 assert( false );
[3778cb2]533 } // switch
[51587aa]534 } else {
[8688ce1]535 if ( nameExpr->get_name() == "..." ) { // case V1 ... V2 or case V1~V2
[ac911f4]536 assert( untypedExpr->get_args().size() == 2 );
537 (*untypedExpr->get_args().begin())->accept( *this );
538 output << " ... ";
539 (*--untypedExpr->get_args().end())->accept( *this );
[057b34f]540 } else { // builtin routines
541 nameExpr->accept( *this );
542 output << "(";
543 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
544 output << ")";
[66d12f7]545 } // if
[51587aa]546 } // if
547 } else {
548 untypedExpr->get_function()->accept( *this );
[6c4ff37]549 output << "(";
[51587aa]550 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
[6c4ff37]551 output << ")";
[51587aa]552 } // if
553 }
[71f4e4f]554
[064e3ff]555 void CodeGenerator::visit( RangeExpr * rangeExpr ) {
556 rangeExpr->get_low()->accept( *this );
557 output << " ... ";
558 rangeExpr->get_high()->accept( *this );
559 }
560
[8688ce1]561 void CodeGenerator::visit( NameExpr * nameExpr ) {
[e04ef3a]562 extension( nameExpr );
[51587aa]563 OperatorInfo opInfo;
564 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
565 assert( opInfo.type == OT_CONSTANT );
[6c4ff37]566 output << opInfo.symbol;
[51587aa]567 } else {
[6c4ff37]568 output << nameExpr->get_name();
[51587aa]569 } // if
570 }
[71f4e4f]571
[8688ce1]572 void CodeGenerator::visit( AddressExpr * addressExpr ) {
[e04ef3a]573 extension( addressExpr );
[6c4ff37]574 output << "(&";
[51587aa]575 // this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address
[8688ce1]576 if ( VariableExpr * variableExpr = dynamic_cast< VariableExpr* >( addressExpr->get_arg() ) ) {
[6c4ff37]577 output << mangleName( variableExpr->get_var() );
[51587aa]578 } else {
579 addressExpr->get_arg()->accept( *this );
580 } // if
[6c4ff37]581 output << ")";
[51587aa]582 }
583
[8688ce1]584 void CodeGenerator::visit( CastExpr * castExpr ) {
[e04ef3a]585 extension( castExpr );
[803deb1]586 output << "(";
[906e24d]587 if ( castExpr->get_result()->isVoid() ) {
[803deb1]588 output << "(void)" ;
[615a096]589 } else if ( ! castExpr->get_result()->get_lvalue() ) {
[803deb1]590 // at least one result type of cast, but not an lvalue
591 output << "(";
[e39241b]592 output << genType( castExpr->get_result(), "", pretty, genC );
[71f4e4f]593 output << ")";
[803deb1]594 } else {
[8e9cbb2]595 // otherwise, the cast is to an lvalue type, so the cast should be dropped, since the result of a cast is
[803deb1]596 // never an lvalue in C
[3778cb2]597 } // if
[803deb1]598 castExpr->get_arg()->accept( *this );
599 output << ")";
[51587aa]600 }
[71f4e4f]601
[8688ce1]602 void CodeGenerator::visit( UntypedMemberExpr * memberExpr ) {
[e39241b]603 assertf( ! genC, "UntypedMemberExpr should not reach code generation." );
604 extension( memberExpr );
605 memberExpr->get_aggregate()->accept( *this );
[5f642e38]606 output << ".";
607 memberExpr->get_member()->accept( *this );
[51587aa]608 }
[71f4e4f]609
[8688ce1]610 void CodeGenerator::visit( MemberExpr * memberExpr ) {
[e04ef3a]611 extension( memberExpr );
[51587aa]612 memberExpr->get_aggregate()->accept( *this );
[6c4ff37]613 output << "." << mangleName( memberExpr->get_member() );
[51587aa]614 }
[71f4e4f]615
[8688ce1]616 void CodeGenerator::visit( VariableExpr * variableExpr ) {
[e04ef3a]617 extension( variableExpr );
[51587aa]618 OperatorInfo opInfo;
619 if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) {
[6c4ff37]620 output << opInfo.symbol;
[51587aa]621 } else {
[6c4ff37]622 output << mangleName( variableExpr->get_var() );
[51587aa]623 } // if
624 }
[71f4e4f]625
[8688ce1]626 void CodeGenerator::visit( ConstantExpr * constantExpr ) {
[51587aa]627 assert( constantExpr->get_constant() );
[e04ef3a]628 extension( constantExpr );
[51587aa]629 constantExpr->get_constant()->accept( *this );
630 }
[71f4e4f]631
[8688ce1]632 void CodeGenerator::visit( SizeofExpr * sizeofExpr ) {
[e04ef3a]633 extension( sizeofExpr );
[6c4ff37]634 output << "sizeof(";
[51587aa]635 if ( sizeofExpr->get_isType() ) {
[e39241b]636 output << genType( sizeofExpr->get_type(), "", pretty, genC );
[51587aa]637 } else {
638 sizeofExpr->get_expr()->accept( *this );
639 } // if
[6c4ff37]640 output << ")";
[51587aa]641 }
[47534159]642
[8688ce1]643 void CodeGenerator::visit( AlignofExpr * alignofExpr ) {
[47534159]644 // use GCC extension to avoid bumping std to C11
[8e9cbb2]645 extension( alignofExpr );
[47534159]646 output << "__alignof__(";
[25a054f]647 if ( alignofExpr->get_isType() ) {
[e39241b]648 output << genType( alignofExpr->get_type(), "", pretty, genC );
[47534159]649 } else {
[25a054f]650 alignofExpr->get_expr()->accept( *this );
[47534159]651 } // if
652 output << ")";
653 }
[71f4e4f]654
[8688ce1]655 void CodeGenerator::visit( UntypedOffsetofExpr * offsetofExpr ) {
[e39241b]656 assertf( ! genC, "UntypedOffsetofExpr should not reach code generation." );
657 output << "offsetof(";
658 output << genType( offsetofExpr->get_type(), "", pretty, genC );
659 output << ", " << offsetofExpr->get_member();
660 output << ")";
[2a4b088]661 }
662
[8688ce1]663 void CodeGenerator::visit( OffsetofExpr * offsetofExpr ) {
[25a054f]664 // use GCC builtin
665 output << "__builtin_offsetof(";
[e39241b]666 output << genType( offsetofExpr->get_type(), "", pretty, genC );
[e551c69]667 output << ", " << mangleName( offsetofExpr->get_member() );
[25a054f]668 output << ")";
669 }
[d63eeb0]670
[8688ce1]671 void CodeGenerator::visit( OffsetPackExpr * offsetPackExpr ) {
[e39241b]672 assertf( ! genC, "OffsetPackExpr should not reach code generation." );
673 output << "__CFA_offsetpack(" << genType( offsetPackExpr->get_type(), "", pretty, genC ) << ")";
[afc1045]674 }
[70a06f6]675
[8688ce1]676 void CodeGenerator::visit( LogicalExpr * logicalExpr ) {
[e04ef3a]677 extension( logicalExpr );
[6c4ff37]678 output << "(";
[51587aa]679 logicalExpr->get_arg1()->accept( *this );
680 if ( logicalExpr->get_isAnd() ) {
[6c4ff37]681 output << " && ";
[51587aa]682 } else {
[6c4ff37]683 output << " || ";
[51587aa]684 } // if
685 logicalExpr->get_arg2()->accept( *this );
[6c4ff37]686 output << ")";
[51587aa]687 }
[71f4e4f]688
[8688ce1]689 void CodeGenerator::visit( ConditionalExpr * conditionalExpr ) {
[e04ef3a]690 extension( conditionalExpr );
[6c4ff37]691 output << "(";
[51587aa]692 conditionalExpr->get_arg1()->accept( *this );
[6c4ff37]693 output << " ? ";
[51587aa]694 conditionalExpr->get_arg2()->accept( *this );
[6c4ff37]695 output << " : ";
[51587aa]696 conditionalExpr->get_arg3()->accept( *this );
[6c4ff37]697 output << ")";
[51587aa]698 }
[71f4e4f]699
[8688ce1]700 void CodeGenerator::visit( CommaExpr * commaExpr ) {
[e04ef3a]701 extension( commaExpr );
[6c4ff37]702 output << "(";
[51587aa]703 commaExpr->get_arg1()->accept( *this );
[6c4ff37]704 output << " , ";
[51587aa]705 commaExpr->get_arg2()->accept( *this );
[6c4ff37]706 output << ")";
[51587aa]707 }
[71f4e4f]708
[e39241b]709 void CodeGenerator::visit( UntypedTupleExpr * tupleExpr ) {
710 assertf( ! genC, "UntypedTupleExpr should not reach code generation." );
[f975c65]711 extension( tupleExpr );
[e39241b]712 output << "[";
713 genCommaList( tupleExpr->get_exprs().begin(), tupleExpr->get_exprs().end() );
714 output << "]";
715 }
[907eccb]716
[e39241b]717 void CodeGenerator::visit( TupleExpr * tupleExpr ) {
718 assertf( ! genC, "TupleExpr should not reach code generation." );
[f975c65]719 extension( tupleExpr );
[e39241b]720 output << "[";
721 genCommaList( tupleExpr->get_exprs().begin(), tupleExpr->get_exprs().end() );
722 output << "]";
723 }
[71f4e4f]724
[f975c65]725 void CodeGenerator::visit( TupleIndexExpr * tupleExpr ) {
726 assertf( ! genC, "TupleIndexExpr should not reach code generation." );
727 extension( tupleExpr );
728 tupleExpr->get_tuple()->accept( *this );
729 output << "." << tupleExpr->get_index();
730 }
731
[e39241b]732 void CodeGenerator::visit( TypeExpr * typeExpr ) {
733 assertf( ! genC, "TypeExpr should not reach code generation." );
734 output<< genType( typeExpr->get_type(), "", pretty, genC );
735 }
[2b6c1e0]736
[8688ce1]737 void CodeGenerator::visit( AsmExpr * asmExpr ) {
[7f5566b]738 if ( asmExpr->get_inout() ) {
739 output << "[ ";
740 asmExpr->get_inout()->accept( *this );
741 output << " ] ";
742 } // if
743 asmExpr->get_constraint()->accept( *this );
744 output << " ( ";
745 asmExpr->get_operand()->accept( *this );
746 output << " )";
747 }
748
[3c13c03]749 void CodeGenerator::visit( CompoundLiteralExpr *compLitExpr ) {
[fbcde64]750 assert( compLitExpr->get_result() && dynamic_cast< ListInit * > ( compLitExpr->get_initializer() ) );
[e39241b]751 output << "(" << genType( compLitExpr->get_result(), "", pretty, genC ) << ")";
[3c13c03]752 compLitExpr->get_initializer()->accept( *this );
753 }
754
[6eb8948]755 void CodeGenerator::visit( StmtExpr * stmtExpr ) {
[3c13c03]756 std::list< Statement * > & stmts = stmtExpr->get_statements()->get_kids();
[4810867]757 output << lineDirective( stmtExpr) << "({" << std::endl;
[3c13c03]758 cur_indent += CodeGenerator::tabsize;
759 unsigned int numStmts = stmts.size();
760 unsigned int i = 0;
761 for ( Statement * stmt : stmts ) {
[4810867]762 output << lineDirective( stmt ) << indent;
763 output << printLabels( stmt->get_labels() );
[3c13c03]764 if ( i+1 == numStmts ) {
765 // last statement in a statement expression needs to be handled specially -
766 // cannot cast to void, otherwise the expression statement has no value
767 if ( ExprStmt * exprStmt = dynamic_cast< ExprStmt * >( stmt ) ) {
768 exprStmt->get_expr()->accept( *this );
769 output << ";" << endl;
770 ++i;
771 break;
772 }
773 }
774 stmt->accept( *this );
775 output << endl;
776 if ( wantSpacing( stmt ) ) {
777 output << endl;
778 } // if
779 ++i;
780 }
781 cur_indent -= CodeGenerator::tabsize;
782 output << indent << "})";
[6eb8948]783 }
784
[4810867]785 // *** Statements
[8688ce1]786 void CodeGenerator::visit( CompoundStmt * compoundStmt ) {
[51587aa]787 std::list<Statement*> ks = compoundStmt->get_kids();
[2b6c1e0]788 output << "{" << endl;
[51587aa]789
[2b6c1e0]790 cur_indent += CodeGenerator::tabsize;
[51587aa]791
[7f5566b]792 for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) {
[cda48b6]793 output << indent << printLabels( (*i)->get_labels() );
[7f5566b]794 (*i)->accept( *this );
[2b6c1e0]795
[6c4ff37]796 output << endl;
[2b6c1e0]797 if ( wantSpacing( *i ) ) {
798 output << endl;
[3778cb2]799 } // if
[8688ce1]800 } // for
[71f4e4f]801 cur_indent -= CodeGenerator::tabsize;
[51587aa]802
[cda48b6]803 output << indent << "}";
[51587aa]804 }
805
[8688ce1]806 void CodeGenerator::visit( ExprStmt * exprStmt ) {
[6c4ff37]807 assert( exprStmt );
[262f085f]808 Expression * expr = exprStmt->get_expr();
809 if ( genC ) {
810 // cast the top-level expression to void to reduce gcc warnings.
811 expr = new CastExpr( expr );
812 }
[321a2481]813 expr->accept( *this );
814 output << ";";
[51587aa]815 }
816
[8688ce1]817 void CodeGenerator::visit( AsmStmt * asmStmt ) {
[7f5566b]818 output << "asm ";
819 if ( asmStmt->get_voltile() ) output << "volatile ";
820 if ( ! asmStmt->get_gotolabels().empty() ) output << "goto ";
821 output << "( ";
822 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
823 output << " : ";
824 genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() );
825 output << " : ";
826 genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() );
827 output << " : ";
828 genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() );
829 if ( ! asmStmt->get_gotolabels().empty() ) {
830 output << " : ";
831 for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) {
832 output << *begin++;
833 if ( begin == asmStmt->get_gotolabels().end() ) break;
834 output << ", ";
835 } // for
836 } // if
837 output << " );" ;
838 }
839
[e994912]840 void CodeGenerator::visit( AsmDecl * asmDecl ) {
841 output << "asm ";
842 AsmStmt * asmStmt = asmDecl->get_stmt();
843 output << "( ";
844 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
845 output << " )" ;
846 }
847
[8688ce1]848 void CodeGenerator::visit( IfStmt * ifStmt ) {
[4810867]849 output << lineDirective( ifStmt );
[7f5566b]850 output << "if ( ";
851 ifStmt->get_condition()->accept( *this );
852 output << " ) ";
[51587aa]853
[7f5566b]854 ifStmt->get_thenPart()->accept( *this );
[51587aa]855
856 if ( ifStmt->get_elsePart() != 0) {
[2b6c1e0]857 output << " else ";
[7f5566b]858 ifStmt->get_elsePart()->accept( *this );
[51587aa]859 } // if
860 }
861
[8688ce1]862 void CodeGenerator::visit( SwitchStmt * switchStmt ) {
[4810867]863 output << lineDirective( switchStmt );
[7f5566b]864 output << "switch ( " ;
865 switchStmt->get_condition()->accept( *this );
866 output << " ) ";
[71f4e4f]867
[2b6c1e0]868 output << "{" << std::endl;
[6c4ff37]869 cur_indent += CodeGenerator::tabsize;
[8688ce1]870 acceptAll( switchStmt->get_statements(), *this );
[6c4ff37]871 cur_indent -= CodeGenerator::tabsize;
[cda48b6]872 output << indent << "}";
[51587aa]873 }
874
[8688ce1]875 void CodeGenerator::visit( CaseStmt * caseStmt ) {
[4810867]876 output << lineDirective( caseStmt );
[cda48b6]877 output << indent;
[eb3261f]878 if ( caseStmt->isDefault()) {
[2b6c1e0]879 output << "default";
[eb3261f]880 } else {
[2b6c1e0]881 output << "case ";
[7f5566b]882 caseStmt->get_condition()->accept( *this );
[17cd4eb]883 } // if
[6c4ff37]884 output << ":\n";
[71f4e4f]885
[51587aa]886 std::list<Statement *> sts = caseStmt->get_statements();
887
[6c4ff37]888 cur_indent += CodeGenerator::tabsize;
[51587aa]889 for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) {
[cda48b6]890 output << indent << printLabels( (*i)->get_labels() ) ;
[7f5566b]891 (*i)->accept( *this );
[6c4ff37]892 output << endl;
[3778cb2]893 } // for
[6c4ff37]894 cur_indent -= CodeGenerator::tabsize;
[51587aa]895 }
896
[8688ce1]897 void CodeGenerator::visit( BranchStmt * branchStmt ) {
[51587aa]898 switch ( branchStmt->get_type()) {
899 case BranchStmt::Goto:
900 if ( ! branchStmt->get_target().empty() )
[6c4ff37]901 output << "goto " << branchStmt->get_target();
[71f4e4f]902 else {
[51587aa]903 if ( branchStmt->get_computedTarget() != 0 ) {
[6c4ff37]904 output << "goto *";
[51587aa]905 branchStmt->get_computedTarget()->accept( *this );
906 } // if
907 } // if
908 break;
909 case BranchStmt::Break:
[6c4ff37]910 output << "break";
[51587aa]911 break;
912 case BranchStmt::Continue:
[6c4ff37]913 output << "continue";
[51587aa]914 break;
[3778cb2]915 } // switch
[2b6c1e0]916 output << ";";
[51587aa]917 }
918
[8688ce1]919 void CodeGenerator::visit( ReturnStmt * returnStmt ) {
[6c4ff37]920 output << "return ";
[4b2589a]921 maybeAccept( returnStmt->get_expr(), *this );
[6c4ff37]922 output << ";";
[51587aa]923 }
924
[8688ce1]925 void CodeGenerator::visit( WhileStmt * whileStmt ) {
[321a2481]926 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]927 output << "do" ;
[321a2481]928 } else {
[6c4ff37]929 output << "while (" ;
[7f5566b]930 whileStmt->get_condition()->accept( *this );
[6c4ff37]931 output << ")";
[51587aa]932 } // if
[2b6c1e0]933 output << " ";
[51587aa]934
[2b6c1e0]935 output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() );
[51587aa]936 whileStmt->get_body()->accept( *this );
937
[cda48b6]938 output << indent;
[51587aa]939
940 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]941 output << " while (" ;
[7f5566b]942 whileStmt->get_condition()->accept( *this );
[6c4ff37]943 output << ");";
[51587aa]944 } // if
945 }
946
[8688ce1]947 void CodeGenerator::visit( ForStmt * forStmt ) {
[8e9cbb2]948 // initialization is always hoisted, so don't bother doing anything with that
[145f1fc]949 output << "for (;";
[51587aa]950
[321a2481]951 if ( forStmt->get_condition() != 0 ) {
[51587aa]952 forStmt->get_condition()->accept( *this );
[3778cb2]953 } // if
[6c4ff37]954 output << ";";
[51587aa]955
[321a2481]956 if ( forStmt->get_increment() != 0 ) {
957 // cast the top-level expression to void to reduce gcc warnings.
958 Expression * expr = new CastExpr( forStmt->get_increment() );
959 expr->accept( *this );
[3778cb2]960 } // if
[2b6c1e0]961 output << ") ";
[51587aa]962
963 if ( forStmt->get_body() != 0 ) {
[2b6c1e0]964 output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() );
[51587aa]965 forStmt->get_body()->accept( *this );
966 } // if
967 }
968
[8688ce1]969 void CodeGenerator::visit( NullStmt * nullStmt ) {
[cda48b6]970 //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() );
[6c4ff37]971 output << "/* null statement */ ;";
[51587aa]972 }
973
[8688ce1]974 void CodeGenerator::visit( DeclStmt * declStmt ) {
[51587aa]975 declStmt->get_decl()->accept( *this );
[71f4e4f]976
[51587aa]977 if ( doSemicolon( declStmt->get_decl() ) ) {
[6c4ff37]978 output << ";";
[51587aa]979 } // if
980 }
981
[dd020c0]982 void CodeGenerator::handleStorageClass( DeclarationWithType * decl ) {
[fb04321]983 if ( decl->get_storageClasses().any() ) {
[6e8bd43]984 decl->get_storageClasses().print( output );
[a7c90d4]985 } // if
[dd020c0]986 } // CodeGenerator::handleStorageClass
[9facf3b]987
988 std::string genName( DeclarationWithType * decl ) {
989 CodeGen::OperatorInfo opInfo;
990 if ( operatorLookup( decl->get_name(), opInfo ) ) {
991 return opInfo.outputName;
992 } else {
993 return decl->get_name();
994 } // if
995 }
[51b73452]996} // namespace CodeGen
[51587aa]997
998// Local Variables: //
999// tab-width: 4 //
1000// mode: c++ //
1001// compile-command: "make install" //
1002// End: //
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