source: src/CodeGen/CodeGenerator.cc@ 70c2df8

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 70c2df8 was daf1af8, checked in by Andrew Beach <ajbeach@…>, 8 years ago

Added a new ThrowStmt node to the Syntax Tree.
  • 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
[daf1af8]12// Last Modified On : Thu Jun 8 16:00:00 2017
13// Update Count : 485
[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
[486341f]115 string CodeGenerator::mangleName( DeclarationWithType * decl ) {
[35b1bf4]116 if ( pretty ) return decl->get_name();
[51587aa]117 if ( decl->get_mangleName() != "" ) {
[f326f99]118 // need to incorporate scope level in order to differentiate names for destructors
119 return decl->get_scopedMangleName();
[51587aa]120 } else {
121 return decl->get_name();
122 } // if
123 }
[94b4364]124
[44a81853]125 void CodeGenerator::genAttributes( list< Attribute * > & attributes ) {
126 if ( attributes.empty() ) return;
127 output << "__attribute__ ((";
128 for ( list< Attribute * >::iterator attr( attributes.begin() );; ) {
129 output << (*attr)->get_name();
130 if ( ! (*attr)->get_parameters().empty() ) {
131 output << "(";
132 genCommaList( (*attr)->get_parameters().begin(), (*attr)->get_parameters().end() );
133 output << ")";
134 } // if
135 if ( ++attr == attributes.end() ) break;
136 output << ","; // separator
137 } // for
138 output << ")) ";
139 } // CodeGenerator::genAttributes
[7baed7d]140
141
[4810867]142 // *** Declarations
[8688ce1]143 void CodeGenerator::visit( FunctionDecl * functionDecl ) {
[8e9cbb2]144 extension( functionDecl );
[7baed7d]145 genAttributes( functionDecl->get_attributes() );
146
[51587aa]147 handleStorageClass( functionDecl );
[6e8bd43]148 functionDecl->get_funcSpec().print( output );
[dd020c0]149
[e39241b]150 output << genType( functionDecl->get_functionType(), mangleName( functionDecl ), pretty, genC );
[51587aa]151
[58dd019]152 asmName( functionDecl );
153
[51587aa]154 // acceptAll( functionDecl->get_oldDecls(), *this );
155 if ( functionDecl->get_statements() ) {
[7f5566b]156 functionDecl->get_statements()->accept( *this );
[51587aa]157 } // if
158 }
159
[8688ce1]160 void CodeGenerator::visit( ObjectDecl * objectDecl ) {
[e39241b]161 if (objectDecl->get_name().empty() && genC ) {
162 // only generate an anonymous name when generating C code, otherwise it clutters the output too much
[d9c8a59]163 static UniqueName name = { "__anonymous_object" };
164 objectDecl->set_name( name.newName() );
165 }
166
[8e9cbb2]167 extension( objectDecl );
[f9cebb5]168 genAttributes( objectDecl->get_attributes() );
169
[51587aa]170 handleStorageClass( objectDecl );
[e39241b]171 output << genType( objectDecl->get_type(), mangleName( objectDecl ), pretty, genC );
[71f4e4f]172
[58dd019]173 asmName( objectDecl );
174
[51587aa]175 if ( objectDecl->get_init() ) {
[6c4ff37]176 output << " = ";
[51587aa]177 objectDecl->get_init()->accept( *this );
178 } // if
[3778cb2]179
[51587aa]180 if ( objectDecl->get_bitfieldWidth() ) {
[6c4ff37]181 output << ":";
[51587aa]182 objectDecl->get_bitfieldWidth()->accept( *this );
183 } // if
184 }
185
[5f642e38]186 void CodeGenerator::handleAggregate( AggregateDecl * aggDecl, const std::string & kind ) {
[c0aa336]187 genAttributes( aggDecl->get_attributes() );
[35b1bf4]188
[e39241b]189 if( ! aggDecl->get_parameters().empty() && ! genC ) {
190 // assertf( ! genC, "Aggregate type parameters should not reach code generation." );
191 output << "forall(";
192 genCommaList( aggDecl->get_parameters().begin(), aggDecl->get_parameters().end() );
193 output << ")" << endl;
194 }
195
[29cf9c8]196 output << kind;
[51587aa]197 if ( aggDecl->get_name() != "" )
[6c4ff37]198 output << aggDecl->get_name();
[71f4e4f]199
[2c57025]200 if ( aggDecl->has_body() ) {
201 std::list< Declaration * > & memb = aggDecl->get_members();
[94b4364]202 output << " {" << endl;
[51587aa]203
[71f4e4f]204 cur_indent += CodeGenerator::tabsize;
[3778cb2]205 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++ ) {
[4810867]206 output << lineDirective( *i ) << indent;
[7f5566b]207 (*i)->accept( *this );
[6c4ff37]208 output << ";" << endl;
[3778cb2]209 } // for
[51587aa]210
[71f4e4f]211 cur_indent -= CodeGenerator::tabsize;
[51587aa]212
[cda48b6]213 output << indent << "}";
[17cd4eb]214 } // if
[51587aa]215 }
[17cd4eb]216
[8688ce1]217 void CodeGenerator::visit( StructDecl * structDecl ) {
[8e9cbb2]218 extension( structDecl );
[5f642e38]219 handleAggregate( structDecl, "struct " );
[51587aa]220 }
[17cd4eb]221
[8688ce1]222 void CodeGenerator::visit( UnionDecl * unionDecl ) {
[8e9cbb2]223 extension( unionDecl );
[5f642e38]224 handleAggregate( unionDecl, "union " );
[51587aa]225 }
[71f4e4f]226
[8688ce1]227 void CodeGenerator::visit( EnumDecl * enumDecl ) {
[8e9cbb2]228 extension( enumDecl );
[4810867]229 output << lineDirective ( enumDecl );
[6c4ff37]230 output << "enum ";
[c0aa336]231 genAttributes( enumDecl->get_attributes() );
[51587aa]232
[8e9cbb2]233 if ( enumDecl->get_name() != "" )
234 output << enumDecl->get_name();
[71f4e4f]235
[8e9cbb2]236 std::list< Declaration* > &memb = enumDecl->get_members();
[51587aa]237
238 if ( ! memb.empty() ) {
[cda48b6]239 output << " {" << endl;
[51587aa]240
[71f4e4f]241 cur_indent += CodeGenerator::tabsize;
[51587aa]242 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) {
[8688ce1]243 ObjectDecl * obj = dynamic_cast< ObjectDecl* >( *i );
[51587aa]244 assert( obj );
[4810867]245 output << lineDirective( obj ) << indent << mangleName( obj );
[51587aa]246 if ( obj->get_init() ) {
[6c4ff37]247 output << " = ";
[7f5566b]248 obj->get_init()->accept( *this );
[51587aa]249 } // if
[6c4ff37]250 output << "," << endl;
[51587aa]251 } // for
252
[71f4e4f]253 cur_indent -= CodeGenerator::tabsize;
[51587aa]254
[cda48b6]255 output << indent << "}";
[51587aa]256 } // if
257 }
[71f4e4f]258
[7e003011]259 void CodeGenerator::visit( __attribute__((unused)) TraitDecl * traitDecl ) {}
[71f4e4f]260
[8688ce1]261 void CodeGenerator::visit( TypedefDecl * typeDecl ) {
[e39241b]262 assertf( ! genC, "Typedefs are removed and substituted in earlier passes." );
[4810867]263 output << lineDirective( typeDecl );
[e39241b]264 output << "typedef ";
265 output << genType( typeDecl->get_base(), typeDecl->get_name(), pretty, genC ) << endl;
[51587aa]266 }
[71f4e4f]267
[8688ce1]268 void CodeGenerator::visit( TypeDecl * typeDecl ) {
[e39241b]269 if ( genC ) {
270 // really, we should mutate this into something that isn't a TypeDecl but that requires large-scale changes,
271 // still to be done
272 extension( typeDecl );
273 output << "extern unsigned long " << typeDecl->get_name();
274 if ( typeDecl->get_base() ) {
275 output << " = sizeof( " << genType( typeDecl->get_base(), "", pretty, genC ) << " )";
276 } // if
277 } else {
[bdd0755]278 output << typeDecl->genTypeString() << " " << typeDecl->get_name();
279 if ( typeDecl->get_kind() != TypeDecl::Any && typeDecl->get_sized() ) {
280 output << " | sized(" << typeDecl->get_name() << ")";
281 }
[e39241b]282 if ( ! typeDecl->get_assertions().empty() ) {
283 output << " | { ";
284 genCommaList( typeDecl->get_assertions().begin(), typeDecl->get_assertions().end() );
285 output << " }";
286 }
287 }
[51587aa]288 }
289
[e45215c]290 void CodeGenerator::printDesignators( std::list< Expression * > & designators ) {
291 typedef std::list< Expression * > DesignatorList;
292 if ( designators.size() == 0 ) return;
293 for ( DesignatorList::iterator iter = designators.begin(); iter != designators.end(); ++iter ) {
[8a4da06]294 if ( dynamic_cast< NameExpr * >( *iter ) ) {
[f32c7f4]295 // if expression is a name, then initializing aggregate member
296 output << ".";
297 (*iter)->accept( *this );
298 } else {
299 // if not a simple name, it has to be a constant expression, i.e. an array designator
[e45215c]300 output << "[";
301 (*iter)->accept( *this );
302 output << "]";
[3778cb2]303 } // if
304 } // for
[e45215c]305 output << " = ";
306 }
307
[8688ce1]308 void CodeGenerator::visit( SingleInit * init ) {
[e45215c]309 printDesignators( init->get_designators() );
[51587aa]310 init->get_value()->accept( *this );
311 }
312
[8688ce1]313 void CodeGenerator::visit( ListInit * init ) {
[e45215c]314 printDesignators( init->get_designators() );
[6c4ff37]315 output << "{ ";
[01b9928]316 genCommaList( init->begin(), init->end() );
[6c4ff37]317 output << " }";
[51587aa]318 }
319
[7e003011]320 void CodeGenerator::visit( __attribute__((unused)) ConstructorInit * init ){
[e39241b]321 assertf( ! genC, "ConstructorInit nodes should not reach code generation." );
322 // xxx - generate something reasonable for constructor/destructor pairs
323 output << "<ctorinit>";
[fc638d2]324 }
325
[8688ce1]326 void CodeGenerator::visit( Constant * constant ) {
[6c4ff37]327 output << constant->get_value() ;
[51587aa]328 }
329
[4810867]330 // *** Expressions
[8688ce1]331 void CodeGenerator::visit( ApplicationExpr * applicationExpr ) {
[e04ef3a]332 extension( applicationExpr );
[8688ce1]333 if ( VariableExpr * varExpr = dynamic_cast< VariableExpr* >( applicationExpr->get_function() ) ) {
[51587aa]334 OperatorInfo opInfo;
335 if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( varExpr->get_var()->get_name(), opInfo ) ) {
336 std::list< Expression* >::iterator arg = applicationExpr->get_args().begin();
337 switch ( opInfo.type ) {
338 case OT_PREFIXASSIGN:
339 case OT_POSTFIXASSIGN:
340 case OT_INFIXASSIGN:
[356189a]341 case OT_CTOR:
[c2ce2350]342 case OT_DTOR:
[51587aa]343 {
344 assert( arg != applicationExpr->get_args().end() );
[8688ce1]345 if ( AddressExpr * addrExpr = dynamic_cast< AddressExpr * >( *arg ) ) {
[356189a]346 // remove & from first assignment/ctor argument
[51587aa]347 *arg = addrExpr->get_arg();
348 } else {
[356189a]349 // no address-of operator, so must be a pointer - add dereference
[066d77a]350 // NOTE: if the assertion starts to trigger, check that the application expr isn't being shared.
351 // Since its arguments are modified here, this assertion most commonly triggers when the application
352 // is visited multiple times.
[8688ce1]353 UntypedExpr * newExpr = new UntypedExpr( new NameExpr( "*?" ) );
[51587aa]354 newExpr->get_args().push_back( *arg );
[906e24d]355 Type * type = InitTweak::getPointerBase( (*arg)->get_result() );
[066d77a]356 assertf( type, "First argument to a derefence must be a pointer. Ensure that expressions are not being shared." );
[906e24d]357 newExpr->set_result( type->clone() );
[51587aa]358 *arg = newExpr;
359 } // if
360 break;
361 }
[71f4e4f]362
[51587aa]363 default:
364 // do nothing
365 ;
[3778cb2]366 } // switch
[71f4e4f]367
[51587aa]368 switch ( opInfo.type ) {
369 case OT_INDEX:
370 assert( applicationExpr->get_args().size() == 2 );
371 (*arg++)->accept( *this );
[6c4ff37]372 output << "[";
[51587aa]373 (*arg)->accept( *this );
[6c4ff37]374 output << "]";
[51587aa]375 break;
[71f4e4f]376
[51587aa]377 case OT_CALL:
[356189a]378 // there are no intrinsic definitions of the function call operator
[51587aa]379 assert( false );
380 break;
[71f4e4f]381
[f1e012b]382 case OT_CTOR:
[c2ce2350]383 case OT_DTOR:
[356189a]384 if ( applicationExpr->get_args().size() == 1 ) {
[8e9cbb2]385 // the expression fed into a single parameter constructor or destructor may contain side
386 // effects, so must still output this expression
[64071c2]387 output << "(";
[356189a]388 (*arg++)->accept( *this );
[64071c2]389 output << ") /* " << opInfo.inputName << " */";
[356189a]390 } else if ( applicationExpr->get_args().size() == 2 ) {
[c2ce2350]391 // intrinsic two parameter constructors are essentially bitwise assignment
[356189a]392 output << "(";
393 (*arg++)->accept( *this );
394 output << opInfo.symbol;
395 (*arg)->accept( *this );
[c2ce2350]396 output << ") /* " << opInfo.inputName << " */";
[356189a]397 } else {
[c2ce2350]398 // no constructors with 0 or more than 2 parameters
[356189a]399 assert( false );
[8688ce1]400 } // if
[356189a]401 break;
[f1e012b]402
[51587aa]403 case OT_PREFIX:
404 case OT_PREFIXASSIGN:
405 assert( applicationExpr->get_args().size() == 1 );
[6c4ff37]406 output << "(";
407 output << opInfo.symbol;
[51587aa]408 (*arg)->accept( *this );
[6c4ff37]409 output << ")";
[51587aa]410 break;
[71f4e4f]411
[51587aa]412 case OT_POSTFIX:
413 case OT_POSTFIXASSIGN:
414 assert( applicationExpr->get_args().size() == 1 );
415 (*arg)->accept( *this );
[6c4ff37]416 output << opInfo.symbol;
[51587aa]417 break;
418
[f1e012b]419
[51587aa]420 case OT_INFIX:
421 case OT_INFIXASSIGN:
422 assert( applicationExpr->get_args().size() == 2 );
[6c4ff37]423 output << "(";
[51587aa]424 (*arg++)->accept( *this );
[6c4ff37]425 output << opInfo.symbol;
[51587aa]426 (*arg)->accept( *this );
[6c4ff37]427 output << ")";
[51587aa]428 break;
[71f4e4f]429
[51587aa]430 case OT_CONSTANT:
[721f17a]431 case OT_LABELADDRESS:
432 // there are no intrinsic definitions of 0/1 or label addresses as functions
[51587aa]433 assert( false );
[3778cb2]434 } // switch
[17cd4eb]435 } else {
[51587aa]436 varExpr->accept( *this );
[6c4ff37]437 output << "(";
[51587aa]438 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]439 output << ")";
[17cd4eb]440 } // if
[51587aa]441 } else {
442 applicationExpr->get_function()->accept( *this );
[6c4ff37]443 output << "(";
[51587aa]444 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]445 output << ")";
[51587aa]446 } // if
447 }
[71f4e4f]448
[8688ce1]449 void CodeGenerator::visit( UntypedExpr * untypedExpr ) {
[e04ef3a]450 extension( untypedExpr );
[8688ce1]451 if ( NameExpr * nameExpr = dynamic_cast< NameExpr* >( untypedExpr->get_function() ) ) {
[51587aa]452 OperatorInfo opInfo;
453 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
454 std::list< Expression* >::iterator arg = untypedExpr->get_args().begin();
455 switch ( opInfo.type ) {
456 case OT_INDEX:
457 assert( untypedExpr->get_args().size() == 2 );
458 (*arg++)->accept( *this );
[6c4ff37]459 output << "[";
[51587aa]460 (*arg)->accept( *this );
[6c4ff37]461 output << "]";
[51587aa]462 break;
[71f4e4f]463
[51587aa]464 case OT_CALL:
[f1e012b]465 assert( false );
466
[c2ce2350]467 case OT_CTOR:
468 case OT_DTOR:
469 if ( untypedExpr->get_args().size() == 1 ) {
[8e9cbb2]470 // the expression fed into a single parameter constructor or destructor may contain side
471 // effects, so must still output this expression
[64071c2]472 output << "(";
[c2ce2350]473 (*arg++)->accept( *this );
[64071c2]474 output << ") /* " << opInfo.inputName << " */";
[c2ce2350]475 } else if ( untypedExpr->get_args().size() == 2 ) {
476 // intrinsic two parameter constructors are essentially bitwise assignment
477 output << "(";
478 (*arg++)->accept( *this );
479 output << opInfo.symbol;
480 (*arg)->accept( *this );
481 output << ") /* " << opInfo.inputName << " */";
482 } else {
483 // no constructors with 0 or more than 2 parameters
484 assert( false );
[3778cb2]485 } // if
[51587aa]486 break;
[71f4e4f]487
[51587aa]488 case OT_PREFIX:
489 case OT_PREFIXASSIGN:
[de62360d]490 case OT_LABELADDRESS:
[51587aa]491 assert( untypedExpr->get_args().size() == 1 );
[6c4ff37]492 output << "(";
493 output << opInfo.symbol;
[51587aa]494 (*arg)->accept( *this );
[6c4ff37]495 output << ")";
[51587aa]496 break;
[71f4e4f]497
[51587aa]498 case OT_POSTFIX:
499 case OT_POSTFIXASSIGN:
500 assert( untypedExpr->get_args().size() == 1 );
501 (*arg)->accept( *this );
[6c4ff37]502 output << opInfo.symbol;
[51587aa]503 break;
[71f4e4f]504
[51587aa]505 case OT_INFIX:
506 case OT_INFIXASSIGN:
507 assert( untypedExpr->get_args().size() == 2 );
[6c4ff37]508 output << "(";
[51587aa]509 (*arg++)->accept( *this );
[6c4ff37]510 output << opInfo.symbol;
[51587aa]511 (*arg)->accept( *this );
[6c4ff37]512 output << ")";
[51587aa]513 break;
[71f4e4f]514
[51587aa]515 case OT_CONSTANT:
516 // there are no intrinsic definitions of 0 or 1 as functions
517 assert( false );
[3778cb2]518 } // switch
[51587aa]519 } else {
[8688ce1]520 if ( nameExpr->get_name() == "..." ) { // case V1 ... V2 or case V1~V2
[ac911f4]521 assert( untypedExpr->get_args().size() == 2 );
522 (*untypedExpr->get_args().begin())->accept( *this );
523 output << " ... ";
524 (*--untypedExpr->get_args().end())->accept( *this );
[057b34f]525 } else { // builtin routines
526 nameExpr->accept( *this );
527 output << "(";
528 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
529 output << ")";
[66d12f7]530 } // if
[51587aa]531 } // if
532 } else {
533 untypedExpr->get_function()->accept( *this );
[6c4ff37]534 output << "(";
[51587aa]535 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
[6c4ff37]536 output << ")";
[51587aa]537 } // if
538 }
[71f4e4f]539
[064e3ff]540 void CodeGenerator::visit( RangeExpr * rangeExpr ) {
541 rangeExpr->get_low()->accept( *this );
542 output << " ... ";
543 rangeExpr->get_high()->accept( *this );
544 }
545
[8688ce1]546 void CodeGenerator::visit( NameExpr * nameExpr ) {
[e04ef3a]547 extension( nameExpr );
[51587aa]548 OperatorInfo opInfo;
549 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
550 assert( opInfo.type == OT_CONSTANT );
[6c4ff37]551 output << opInfo.symbol;
[51587aa]552 } else {
[6c4ff37]553 output << nameExpr->get_name();
[51587aa]554 } // if
555 }
[71f4e4f]556
[8688ce1]557 void CodeGenerator::visit( AddressExpr * addressExpr ) {
[e04ef3a]558 extension( addressExpr );
[6c4ff37]559 output << "(&";
[51587aa]560 // this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address
[8688ce1]561 if ( VariableExpr * variableExpr = dynamic_cast< VariableExpr* >( addressExpr->get_arg() ) ) {
[6c4ff37]562 output << mangleName( variableExpr->get_var() );
[51587aa]563 } else {
564 addressExpr->get_arg()->accept( *this );
565 } // if
[6c4ff37]566 output << ")";
[51587aa]567 }
568
[8688ce1]569 void CodeGenerator::visit( CastExpr * castExpr ) {
[e04ef3a]570 extension( castExpr );
[803deb1]571 output << "(";
[906e24d]572 if ( castExpr->get_result()->isVoid() ) {
[803deb1]573 output << "(void)" ;
[615a096]574 } else if ( ! castExpr->get_result()->get_lvalue() ) {
[803deb1]575 // at least one result type of cast, but not an lvalue
576 output << "(";
[e39241b]577 output << genType( castExpr->get_result(), "", pretty, genC );
[71f4e4f]578 output << ")";
[803deb1]579 } else {
[8e9cbb2]580 // otherwise, the cast is to an lvalue type, so the cast should be dropped, since the result of a cast is
[803deb1]581 // never an lvalue in C
[3778cb2]582 } // if
[803deb1]583 castExpr->get_arg()->accept( *this );
584 output << ")";
[51587aa]585 }
[71f4e4f]586
[8688ce1]587 void CodeGenerator::visit( UntypedMemberExpr * memberExpr ) {
[e39241b]588 assertf( ! genC, "UntypedMemberExpr should not reach code generation." );
589 extension( memberExpr );
590 memberExpr->get_aggregate()->accept( *this );
[5f642e38]591 output << ".";
592 memberExpr->get_member()->accept( *this );
[51587aa]593 }
[71f4e4f]594
[8688ce1]595 void CodeGenerator::visit( MemberExpr * memberExpr ) {
[e04ef3a]596 extension( memberExpr );
[51587aa]597 memberExpr->get_aggregate()->accept( *this );
[6c4ff37]598 output << "." << mangleName( memberExpr->get_member() );
[51587aa]599 }
[71f4e4f]600
[8688ce1]601 void CodeGenerator::visit( VariableExpr * variableExpr ) {
[e04ef3a]602 extension( variableExpr );
[51587aa]603 OperatorInfo opInfo;
604 if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) {
[6c4ff37]605 output << opInfo.symbol;
[51587aa]606 } else {
[6c4ff37]607 output << mangleName( variableExpr->get_var() );
[51587aa]608 } // if
609 }
[71f4e4f]610
[8688ce1]611 void CodeGenerator::visit( ConstantExpr * constantExpr ) {
[51587aa]612 assert( constantExpr->get_constant() );
[e04ef3a]613 extension( constantExpr );
[51587aa]614 constantExpr->get_constant()->accept( *this );
615 }
[71f4e4f]616
[8688ce1]617 void CodeGenerator::visit( SizeofExpr * sizeofExpr ) {
[e04ef3a]618 extension( sizeofExpr );
[6c4ff37]619 output << "sizeof(";
[51587aa]620 if ( sizeofExpr->get_isType() ) {
[e39241b]621 output << genType( sizeofExpr->get_type(), "", pretty, genC );
[51587aa]622 } else {
623 sizeofExpr->get_expr()->accept( *this );
624 } // if
[6c4ff37]625 output << ")";
[51587aa]626 }
[47534159]627
[8688ce1]628 void CodeGenerator::visit( AlignofExpr * alignofExpr ) {
[47534159]629 // use GCC extension to avoid bumping std to C11
[8e9cbb2]630 extension( alignofExpr );
[47534159]631 output << "__alignof__(";
[25a054f]632 if ( alignofExpr->get_isType() ) {
[e39241b]633 output << genType( alignofExpr->get_type(), "", pretty, genC );
[47534159]634 } else {
[25a054f]635 alignofExpr->get_expr()->accept( *this );
[47534159]636 } // if
637 output << ")";
638 }
[71f4e4f]639
[8688ce1]640 void CodeGenerator::visit( UntypedOffsetofExpr * offsetofExpr ) {
[e39241b]641 assertf( ! genC, "UntypedOffsetofExpr should not reach code generation." );
642 output << "offsetof(";
643 output << genType( offsetofExpr->get_type(), "", pretty, genC );
644 output << ", " << offsetofExpr->get_member();
645 output << ")";
[2a4b088]646 }
647
[8688ce1]648 void CodeGenerator::visit( OffsetofExpr * offsetofExpr ) {
[25a054f]649 // use GCC builtin
650 output << "__builtin_offsetof(";
[e39241b]651 output << genType( offsetofExpr->get_type(), "", pretty, genC );
[e551c69]652 output << ", " << mangleName( offsetofExpr->get_member() );
[25a054f]653 output << ")";
654 }
[d63eeb0]655
[8688ce1]656 void CodeGenerator::visit( OffsetPackExpr * offsetPackExpr ) {
[e39241b]657 assertf( ! genC, "OffsetPackExpr should not reach code generation." );
658 output << "__CFA_offsetpack(" << genType( offsetPackExpr->get_type(), "", pretty, genC ) << ")";
[afc1045]659 }
[70a06f6]660
[8688ce1]661 void CodeGenerator::visit( LogicalExpr * logicalExpr ) {
[e04ef3a]662 extension( logicalExpr );
[6c4ff37]663 output << "(";
[51587aa]664 logicalExpr->get_arg1()->accept( *this );
665 if ( logicalExpr->get_isAnd() ) {
[6c4ff37]666 output << " && ";
[51587aa]667 } else {
[6c4ff37]668 output << " || ";
[51587aa]669 } // if
670 logicalExpr->get_arg2()->accept( *this );
[6c4ff37]671 output << ")";
[51587aa]672 }
[71f4e4f]673
[8688ce1]674 void CodeGenerator::visit( ConditionalExpr * conditionalExpr ) {
[e04ef3a]675 extension( conditionalExpr );
[6c4ff37]676 output << "(";
[51587aa]677 conditionalExpr->get_arg1()->accept( *this );
[6c4ff37]678 output << " ? ";
[51587aa]679 conditionalExpr->get_arg2()->accept( *this );
[6c4ff37]680 output << " : ";
[51587aa]681 conditionalExpr->get_arg3()->accept( *this );
[6c4ff37]682 output << ")";
[51587aa]683 }
[71f4e4f]684
[8688ce1]685 void CodeGenerator::visit( CommaExpr * commaExpr ) {
[e04ef3a]686 extension( commaExpr );
[6c4ff37]687 output << "(";
[51587aa]688 commaExpr->get_arg1()->accept( *this );
[6c4ff37]689 output << " , ";
[51587aa]690 commaExpr->get_arg2()->accept( *this );
[6c4ff37]691 output << ")";
[51587aa]692 }
[71f4e4f]693
[e39241b]694 void CodeGenerator::visit( UntypedTupleExpr * tupleExpr ) {
695 assertf( ! genC, "UntypedTupleExpr should not reach code generation." );
[f975c65]696 extension( tupleExpr );
[e39241b]697 output << "[";
698 genCommaList( tupleExpr->get_exprs().begin(), tupleExpr->get_exprs().end() );
699 output << "]";
700 }
[907eccb]701
[e39241b]702 void CodeGenerator::visit( TupleExpr * tupleExpr ) {
703 assertf( ! genC, "TupleExpr should not reach code generation." );
[f975c65]704 extension( tupleExpr );
[e39241b]705 output << "[";
706 genCommaList( tupleExpr->get_exprs().begin(), tupleExpr->get_exprs().end() );
707 output << "]";
708 }
[71f4e4f]709
[f975c65]710 void CodeGenerator::visit( TupleIndexExpr * tupleExpr ) {
711 assertf( ! genC, "TupleIndexExpr should not reach code generation." );
712 extension( tupleExpr );
713 tupleExpr->get_tuple()->accept( *this );
714 output << "." << tupleExpr->get_index();
715 }
716
[e39241b]717 void CodeGenerator::visit( TypeExpr * typeExpr ) {
718 assertf( ! genC, "TypeExpr should not reach code generation." );
719 output<< genType( typeExpr->get_type(), "", pretty, genC );
720 }
[2b6c1e0]721
[8688ce1]722 void CodeGenerator::visit( AsmExpr * asmExpr ) {
[7f5566b]723 if ( asmExpr->get_inout() ) {
724 output << "[ ";
725 asmExpr->get_inout()->accept( *this );
726 output << " ] ";
727 } // if
728 asmExpr->get_constraint()->accept( *this );
729 output << " ( ";
730 asmExpr->get_operand()->accept( *this );
731 output << " )";
732 }
733
[3c13c03]734 void CodeGenerator::visit( CompoundLiteralExpr *compLitExpr ) {
[fbcde64]735 assert( compLitExpr->get_result() && dynamic_cast< ListInit * > ( compLitExpr->get_initializer() ) );
[e39241b]736 output << "(" << genType( compLitExpr->get_result(), "", pretty, genC ) << ")";
[3c13c03]737 compLitExpr->get_initializer()->accept( *this );
738 }
739
[6eb8948]740 void CodeGenerator::visit( StmtExpr * stmtExpr ) {
[3c13c03]741 std::list< Statement * > & stmts = stmtExpr->get_statements()->get_kids();
[4810867]742 output << lineDirective( stmtExpr) << "({" << std::endl;
[3c13c03]743 cur_indent += CodeGenerator::tabsize;
744 unsigned int numStmts = stmts.size();
745 unsigned int i = 0;
746 for ( Statement * stmt : stmts ) {
[4810867]747 output << lineDirective( stmt ) << indent;
748 output << printLabels( stmt->get_labels() );
[3c13c03]749 if ( i+1 == numStmts ) {
750 // last statement in a statement expression needs to be handled specially -
751 // cannot cast to void, otherwise the expression statement has no value
752 if ( ExprStmt * exprStmt = dynamic_cast< ExprStmt * >( stmt ) ) {
753 exprStmt->get_expr()->accept( *this );
754 output << ";" << endl;
755 ++i;
756 break;
757 }
758 }
759 stmt->accept( *this );
760 output << endl;
761 if ( wantSpacing( stmt ) ) {
762 output << endl;
763 } // if
764 ++i;
765 }
766 cur_indent -= CodeGenerator::tabsize;
767 output << indent << "})";
[6eb8948]768 }
769
[4810867]770 // *** Statements
[8688ce1]771 void CodeGenerator::visit( CompoundStmt * compoundStmt ) {
[51587aa]772 std::list<Statement*> ks = compoundStmt->get_kids();
[2b6c1e0]773 output << "{" << endl;
[51587aa]774
[2b6c1e0]775 cur_indent += CodeGenerator::tabsize;
[51587aa]776
[7f5566b]777 for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) {
[cda48b6]778 output << indent << printLabels( (*i)->get_labels() );
[7f5566b]779 (*i)->accept( *this );
[2b6c1e0]780
[6c4ff37]781 output << endl;
[2b6c1e0]782 if ( wantSpacing( *i ) ) {
783 output << endl;
[3778cb2]784 } // if
[8688ce1]785 } // for
[71f4e4f]786 cur_indent -= CodeGenerator::tabsize;
[51587aa]787
[cda48b6]788 output << indent << "}";
[51587aa]789 }
790
[8688ce1]791 void CodeGenerator::visit( ExprStmt * exprStmt ) {
[6c4ff37]792 assert( exprStmt );
[262f085f]793 Expression * expr = exprStmt->get_expr();
794 if ( genC ) {
795 // cast the top-level expression to void to reduce gcc warnings.
796 expr = new CastExpr( expr );
797 }
[321a2481]798 expr->accept( *this );
799 output << ";";
[51587aa]800 }
801
[8688ce1]802 void CodeGenerator::visit( AsmStmt * asmStmt ) {
[7f5566b]803 output << "asm ";
804 if ( asmStmt->get_voltile() ) output << "volatile ";
805 if ( ! asmStmt->get_gotolabels().empty() ) output << "goto ";
806 output << "( ";
807 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
808 output << " : ";
809 genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() );
810 output << " : ";
811 genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() );
812 output << " : ";
813 genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() );
814 if ( ! asmStmt->get_gotolabels().empty() ) {
815 output << " : ";
816 for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) {
817 output << *begin++;
818 if ( begin == asmStmt->get_gotolabels().end() ) break;
819 output << ", ";
820 } // for
821 } // if
822 output << " );" ;
823 }
824
[e994912]825 void CodeGenerator::visit( AsmDecl * asmDecl ) {
826 output << "asm ";
827 AsmStmt * asmStmt = asmDecl->get_stmt();
828 output << "( ";
829 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
830 output << " )" ;
831 }
832
[8688ce1]833 void CodeGenerator::visit( IfStmt * ifStmt ) {
[4810867]834 output << lineDirective( ifStmt );
[7f5566b]835 output << "if ( ";
836 ifStmt->get_condition()->accept( *this );
837 output << " ) ";
[51587aa]838
[7f5566b]839 ifStmt->get_thenPart()->accept( *this );
[51587aa]840
841 if ( ifStmt->get_elsePart() != 0) {
[2b6c1e0]842 output << " else ";
[7f5566b]843 ifStmt->get_elsePart()->accept( *this );
[51587aa]844 } // if
845 }
846
[8688ce1]847 void CodeGenerator::visit( SwitchStmt * switchStmt ) {
[4810867]848 output << lineDirective( switchStmt );
[7f5566b]849 output << "switch ( " ;
850 switchStmt->get_condition()->accept( *this );
851 output << " ) ";
[71f4e4f]852
[2b6c1e0]853 output << "{" << std::endl;
[6c4ff37]854 cur_indent += CodeGenerator::tabsize;
[8688ce1]855 acceptAll( switchStmt->get_statements(), *this );
[6c4ff37]856 cur_indent -= CodeGenerator::tabsize;
[cda48b6]857 output << indent << "}";
[51587aa]858 }
859
[8688ce1]860 void CodeGenerator::visit( CaseStmt * caseStmt ) {
[4810867]861 output << lineDirective( caseStmt );
[cda48b6]862 output << indent;
[eb3261f]863 if ( caseStmt->isDefault()) {
[2b6c1e0]864 output << "default";
[eb3261f]865 } else {
[2b6c1e0]866 output << "case ";
[7f5566b]867 caseStmt->get_condition()->accept( *this );
[17cd4eb]868 } // if
[6c4ff37]869 output << ":\n";
[71f4e4f]870
[51587aa]871 std::list<Statement *> sts = caseStmt->get_statements();
872
[6c4ff37]873 cur_indent += CodeGenerator::tabsize;
[51587aa]874 for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) {
[cda48b6]875 output << indent << printLabels( (*i)->get_labels() ) ;
[7f5566b]876 (*i)->accept( *this );
[6c4ff37]877 output << endl;
[3778cb2]878 } // for
[6c4ff37]879 cur_indent -= CodeGenerator::tabsize;
[51587aa]880 }
881
[8688ce1]882 void CodeGenerator::visit( BranchStmt * branchStmt ) {
[51587aa]883 switch ( branchStmt->get_type()) {
884 case BranchStmt::Goto:
885 if ( ! branchStmt->get_target().empty() )
[6c4ff37]886 output << "goto " << branchStmt->get_target();
[71f4e4f]887 else {
[51587aa]888 if ( branchStmt->get_computedTarget() != 0 ) {
[6c4ff37]889 output << "goto *";
[51587aa]890 branchStmt->get_computedTarget()->accept( *this );
891 } // if
892 } // if
893 break;
894 case BranchStmt::Break:
[6c4ff37]895 output << "break";
[51587aa]896 break;
897 case BranchStmt::Continue:
[6c4ff37]898 output << "continue";
[51587aa]899 break;
[3778cb2]900 } // switch
[2b6c1e0]901 output << ";";
[51587aa]902 }
903
[8688ce1]904 void CodeGenerator::visit( ReturnStmt * returnStmt ) {
[6c4ff37]905 output << "return ";
[4b2589a]906 maybeAccept( returnStmt->get_expr(), *this );
[6c4ff37]907 output << ";";
[51587aa]908 }
909
[daf1af8]910 void CodeGenerator::visit( ThrowStmt * throwStmt ) {
911 assertf( ! genC, "Throw statements should not reach code generation." );
912
913 output << ((throwStmt->get_kind() == ThrowStmt::Terminate) ?
914 "throw" : "throwResume");
915 if (throwStmt->get_expr()) {
916 output << " ";
917 throwStmt->get_expr()->accept( *this );
918 }
919 if (throwStmt->get_target()) {
920 output << " _At ";
921 throwStmt->get_target()->accept( *this );
922 }
923 output << ";";
924 }
925
[8688ce1]926 void CodeGenerator::visit( WhileStmt * whileStmt ) {
[321a2481]927 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]928 output << "do" ;
[321a2481]929 } else {
[6c4ff37]930 output << "while (" ;
[7f5566b]931 whileStmt->get_condition()->accept( *this );
[6c4ff37]932 output << ")";
[51587aa]933 } // if
[2b6c1e0]934 output << " ";
[51587aa]935
[2b6c1e0]936 output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() );
[51587aa]937 whileStmt->get_body()->accept( *this );
938
[cda48b6]939 output << indent;
[51587aa]940
941 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]942 output << " while (" ;
[7f5566b]943 whileStmt->get_condition()->accept( *this );
[6c4ff37]944 output << ");";
[51587aa]945 } // if
946 }
947
[8688ce1]948 void CodeGenerator::visit( ForStmt * forStmt ) {
[8e9cbb2]949 // initialization is always hoisted, so don't bother doing anything with that
[145f1fc]950 output << "for (;";
[51587aa]951
[321a2481]952 if ( forStmt->get_condition() != 0 ) {
[51587aa]953 forStmt->get_condition()->accept( *this );
[3778cb2]954 } // if
[6c4ff37]955 output << ";";
[51587aa]956
[321a2481]957 if ( forStmt->get_increment() != 0 ) {
958 // cast the top-level expression to void to reduce gcc warnings.
959 Expression * expr = new CastExpr( forStmt->get_increment() );
960 expr->accept( *this );
[3778cb2]961 } // if
[2b6c1e0]962 output << ") ";
[51587aa]963
964 if ( forStmt->get_body() != 0 ) {
[2b6c1e0]965 output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() );
[51587aa]966 forStmt->get_body()->accept( *this );
967 } // if
968 }
969
[7e003011]970 void CodeGenerator::visit( __attribute__((unused)) NullStmt * nullStmt ) {
[cda48b6]971 //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() );
[6c4ff37]972 output << "/* null statement */ ;";
[51587aa]973 }
974
[8688ce1]975 void CodeGenerator::visit( DeclStmt * declStmt ) {
[51587aa]976 declStmt->get_decl()->accept( *this );
[71f4e4f]977
[51587aa]978 if ( doSemicolon( declStmt->get_decl() ) ) {
[6c4ff37]979 output << ";";
[51587aa]980 } // if
981 }
982
[dd020c0]983 void CodeGenerator::handleStorageClass( DeclarationWithType * decl ) {
[fb04321]984 if ( decl->get_storageClasses().any() ) {
[6e8bd43]985 decl->get_storageClasses().print( output );
[a7c90d4]986 } // if
[dd020c0]987 } // CodeGenerator::handleStorageClass
[9facf3b]988
989 std::string genName( DeclarationWithType * decl ) {
990 CodeGen::OperatorInfo opInfo;
991 if ( operatorLookup( decl->get_name(), opInfo ) ) {
992 return opInfo.outputName;
993 } else {
994 return decl->get_name();
995 } // if
996 }
[51b73452]997} // namespace CodeGen
[51587aa]998
999// Local Variables: //
1000// tab-width: 4 //
1001// mode: c++ //
1002// compile-command: "make install" //
1003// End: //
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