source: src/CodeGen/CodeGenerator.cc@ b877fa8

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 b877fa8 was 62423350, checked in by Rob Schluntz <rschlunt@…>, 8 years ago

Big push on designations and initialization: works with generic types, tuples, arrays, tests pass.
Refactor guard_value_impl.
Add list of declarations to TupleType.
  • Property mode set to 100644
File size: 30.8 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
[e4d829b]290 void CodeGenerator::visit( Designation * designation ) {
291 std::list< Expression * > designators = designation->get_designators();
[e45215c]292 if ( designators.size() == 0 ) return;
[e4d829b]293 for ( Expression * des : designators ) {
[62423350]294 if ( dynamic_cast< NameExpr * >( des ) || dynamic_cast< VariableExpr * >( des ) ) {
295 // if expression is a NameExpr or VariableExpr, then initializing aggregate member
296 output << ".";
[e4d829b]297 des->accept( *this );
298 } else {
[62423350]299 // otherwise, it has to be a ConstantExpr or CastExpr, initializing array eleemnt
300 output << "[";
[e4d829b]301 des->accept( *this );
[62423350]302 output << "]";
[3778cb2]303 } // if
304 } // for
[e45215c]305 output << " = ";
306 }
307
[8688ce1]308 void CodeGenerator::visit( SingleInit * init ) {
[51587aa]309 init->get_value()->accept( *this );
310 }
311
[8688ce1]312 void CodeGenerator::visit( ListInit * init ) {
[e4d829b]313 auto initBegin = init->begin();
314 auto initEnd = init->end();
315 auto desigBegin = init->get_designations().begin();
316 auto desigEnd = init->get_designations().end();
317
[6c4ff37]318 output << "{ ";
[e4d829b]319 for ( ; initBegin != initEnd && desigBegin != desigEnd; ) {
320 (*desigBegin)->accept( *this );
321 (*initBegin)->accept( *this );
322 ++initBegin, ++desigBegin;
323 if ( initBegin != initEnd ) {
324 output << ", ";
325 }
326 }
[6c4ff37]327 output << " }";
[e4d829b]328 assertf( initBegin == initEnd && desigBegin == desigEnd, "Initializers and designators not the same length. %s", toString( init ).c_str() );
[51587aa]329 }
330
[7e003011]331 void CodeGenerator::visit( __attribute__((unused)) ConstructorInit * init ){
[e39241b]332 assertf( ! genC, "ConstructorInit nodes should not reach code generation." );
333 // xxx - generate something reasonable for constructor/destructor pairs
334 output << "<ctorinit>";
[fc638d2]335 }
336
[8688ce1]337 void CodeGenerator::visit( Constant * constant ) {
[6c4ff37]338 output << constant->get_value() ;
[51587aa]339 }
340
[4810867]341 // *** Expressions
[8688ce1]342 void CodeGenerator::visit( ApplicationExpr * applicationExpr ) {
[e04ef3a]343 extension( applicationExpr );
[8688ce1]344 if ( VariableExpr * varExpr = dynamic_cast< VariableExpr* >( applicationExpr->get_function() ) ) {
[51587aa]345 OperatorInfo opInfo;
346 if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( varExpr->get_var()->get_name(), opInfo ) ) {
347 std::list< Expression* >::iterator arg = applicationExpr->get_args().begin();
348 switch ( opInfo.type ) {
349 case OT_PREFIXASSIGN:
350 case OT_POSTFIXASSIGN:
351 case OT_INFIXASSIGN:
[356189a]352 case OT_CTOR:
[c2ce2350]353 case OT_DTOR:
[51587aa]354 {
355 assert( arg != applicationExpr->get_args().end() );
[8688ce1]356 if ( AddressExpr * addrExpr = dynamic_cast< AddressExpr * >( *arg ) ) {
[356189a]357 // remove & from first assignment/ctor argument
[51587aa]358 *arg = addrExpr->get_arg();
359 } else {
[356189a]360 // no address-of operator, so must be a pointer - add dereference
[066d77a]361 // NOTE: if the assertion starts to trigger, check that the application expr isn't being shared.
362 // Since its arguments are modified here, this assertion most commonly triggers when the application
363 // is visited multiple times.
[8688ce1]364 UntypedExpr * newExpr = new UntypedExpr( new NameExpr( "*?" ) );
[51587aa]365 newExpr->get_args().push_back( *arg );
[906e24d]366 Type * type = InitTweak::getPointerBase( (*arg)->get_result() );
[066d77a]367 assertf( type, "First argument to a derefence must be a pointer. Ensure that expressions are not being shared." );
[906e24d]368 newExpr->set_result( type->clone() );
[51587aa]369 *arg = newExpr;
370 } // if
371 break;
372 }
[71f4e4f]373
[51587aa]374 default:
375 // do nothing
376 ;
[3778cb2]377 } // switch
[71f4e4f]378
[51587aa]379 switch ( opInfo.type ) {
380 case OT_INDEX:
381 assert( applicationExpr->get_args().size() == 2 );
382 (*arg++)->accept( *this );
[6c4ff37]383 output << "[";
[51587aa]384 (*arg)->accept( *this );
[6c4ff37]385 output << "]";
[51587aa]386 break;
[71f4e4f]387
[51587aa]388 case OT_CALL:
[356189a]389 // there are no intrinsic definitions of the function call operator
[51587aa]390 assert( false );
391 break;
[71f4e4f]392
[f1e012b]393 case OT_CTOR:
[c2ce2350]394 case OT_DTOR:
[356189a]395 if ( applicationExpr->get_args().size() == 1 ) {
[8e9cbb2]396 // the expression fed into a single parameter constructor or destructor may contain side
397 // effects, so must still output this expression
[64071c2]398 output << "(";
[356189a]399 (*arg++)->accept( *this );
[64071c2]400 output << ") /* " << opInfo.inputName << " */";
[356189a]401 } else if ( applicationExpr->get_args().size() == 2 ) {
[c2ce2350]402 // intrinsic two parameter constructors are essentially bitwise assignment
[356189a]403 output << "(";
404 (*arg++)->accept( *this );
405 output << opInfo.symbol;
406 (*arg)->accept( *this );
[c2ce2350]407 output << ") /* " << opInfo.inputName << " */";
[356189a]408 } else {
[c2ce2350]409 // no constructors with 0 or more than 2 parameters
[356189a]410 assert( false );
[8688ce1]411 } // if
[356189a]412 break;
[f1e012b]413
[51587aa]414 case OT_PREFIX:
415 case OT_PREFIXASSIGN:
416 assert( applicationExpr->get_args().size() == 1 );
[6c4ff37]417 output << "(";
418 output << opInfo.symbol;
[51587aa]419 (*arg)->accept( *this );
[6c4ff37]420 output << ")";
[51587aa]421 break;
[71f4e4f]422
[51587aa]423 case OT_POSTFIX:
424 case OT_POSTFIXASSIGN:
425 assert( applicationExpr->get_args().size() == 1 );
426 (*arg)->accept( *this );
[6c4ff37]427 output << opInfo.symbol;
[51587aa]428 break;
429
[f1e012b]430
[51587aa]431 case OT_INFIX:
432 case OT_INFIXASSIGN:
433 assert( applicationExpr->get_args().size() == 2 );
[6c4ff37]434 output << "(";
[51587aa]435 (*arg++)->accept( *this );
[6c4ff37]436 output << opInfo.symbol;
[51587aa]437 (*arg)->accept( *this );
[6c4ff37]438 output << ")";
[51587aa]439 break;
[71f4e4f]440
[51587aa]441 case OT_CONSTANT:
[721f17a]442 case OT_LABELADDRESS:
443 // there are no intrinsic definitions of 0/1 or label addresses as functions
[51587aa]444 assert( false );
[3778cb2]445 } // switch
[17cd4eb]446 } else {
[51587aa]447 varExpr->accept( *this );
[6c4ff37]448 output << "(";
[51587aa]449 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]450 output << ")";
[17cd4eb]451 } // if
[51587aa]452 } else {
453 applicationExpr->get_function()->accept( *this );
[6c4ff37]454 output << "(";
[51587aa]455 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]456 output << ")";
[51587aa]457 } // if
458 }
[71f4e4f]459
[8688ce1]460 void CodeGenerator::visit( UntypedExpr * untypedExpr ) {
[e04ef3a]461 extension( untypedExpr );
[8688ce1]462 if ( NameExpr * nameExpr = dynamic_cast< NameExpr* >( untypedExpr->get_function() ) ) {
[51587aa]463 OperatorInfo opInfo;
464 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
465 std::list< Expression* >::iterator arg = untypedExpr->get_args().begin();
466 switch ( opInfo.type ) {
467 case OT_INDEX:
468 assert( untypedExpr->get_args().size() == 2 );
469 (*arg++)->accept( *this );
[6c4ff37]470 output << "[";
[51587aa]471 (*arg)->accept( *this );
[6c4ff37]472 output << "]";
[51587aa]473 break;
[71f4e4f]474
[51587aa]475 case OT_CALL:
[f1e012b]476 assert( false );
477
[c2ce2350]478 case OT_CTOR:
479 case OT_DTOR:
480 if ( untypedExpr->get_args().size() == 1 ) {
[8e9cbb2]481 // the expression fed into a single parameter constructor or destructor may contain side
482 // effects, so must still output this expression
[64071c2]483 output << "(";
[c2ce2350]484 (*arg++)->accept( *this );
[64071c2]485 output << ") /* " << opInfo.inputName << " */";
[c2ce2350]486 } else if ( untypedExpr->get_args().size() == 2 ) {
487 // intrinsic two parameter constructors are essentially bitwise assignment
488 output << "(";
489 (*arg++)->accept( *this );
490 output << opInfo.symbol;
491 (*arg)->accept( *this );
492 output << ") /* " << opInfo.inputName << " */";
493 } else {
494 // no constructors with 0 or more than 2 parameters
495 assert( false );
[3778cb2]496 } // if
[51587aa]497 break;
[71f4e4f]498
[51587aa]499 case OT_PREFIX:
500 case OT_PREFIXASSIGN:
[de62360d]501 case OT_LABELADDRESS:
[51587aa]502 assert( untypedExpr->get_args().size() == 1 );
[6c4ff37]503 output << "(";
504 output << opInfo.symbol;
[51587aa]505 (*arg)->accept( *this );
[6c4ff37]506 output << ")";
[51587aa]507 break;
[71f4e4f]508
[51587aa]509 case OT_POSTFIX:
510 case OT_POSTFIXASSIGN:
511 assert( untypedExpr->get_args().size() == 1 );
512 (*arg)->accept( *this );
[6c4ff37]513 output << opInfo.symbol;
[51587aa]514 break;
[71f4e4f]515
[51587aa]516 case OT_INFIX:
517 case OT_INFIXASSIGN:
518 assert( untypedExpr->get_args().size() == 2 );
[6c4ff37]519 output << "(";
[51587aa]520 (*arg++)->accept( *this );
[6c4ff37]521 output << opInfo.symbol;
[51587aa]522 (*arg)->accept( *this );
[6c4ff37]523 output << ")";
[51587aa]524 break;
[71f4e4f]525
[51587aa]526 case OT_CONSTANT:
527 // there are no intrinsic definitions of 0 or 1 as functions
528 assert( false );
[3778cb2]529 } // switch
[51587aa]530 } else {
[8688ce1]531 if ( nameExpr->get_name() == "..." ) { // case V1 ... V2 or case V1~V2
[ac911f4]532 assert( untypedExpr->get_args().size() == 2 );
533 (*untypedExpr->get_args().begin())->accept( *this );
534 output << " ... ";
535 (*--untypedExpr->get_args().end())->accept( *this );
[057b34f]536 } else { // builtin routines
537 nameExpr->accept( *this );
538 output << "(";
539 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
540 output << ")";
[66d12f7]541 } // if
[51587aa]542 } // if
543 } else {
544 untypedExpr->get_function()->accept( *this );
[6c4ff37]545 output << "(";
[51587aa]546 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
[6c4ff37]547 output << ")";
[51587aa]548 } // if
549 }
[71f4e4f]550
[064e3ff]551 void CodeGenerator::visit( RangeExpr * rangeExpr ) {
552 rangeExpr->get_low()->accept( *this );
553 output << " ... ";
554 rangeExpr->get_high()->accept( *this );
555 }
556
[8688ce1]557 void CodeGenerator::visit( NameExpr * nameExpr ) {
[e04ef3a]558 extension( nameExpr );
[51587aa]559 OperatorInfo opInfo;
560 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
561 assert( opInfo.type == OT_CONSTANT );
[6c4ff37]562 output << opInfo.symbol;
[51587aa]563 } else {
[6c4ff37]564 output << nameExpr->get_name();
[51587aa]565 } // if
566 }
[71f4e4f]567
[8688ce1]568 void CodeGenerator::visit( AddressExpr * addressExpr ) {
[e04ef3a]569 extension( addressExpr );
[6c4ff37]570 output << "(&";
[51587aa]571 // this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address
[8688ce1]572 if ( VariableExpr * variableExpr = dynamic_cast< VariableExpr* >( addressExpr->get_arg() ) ) {
[6c4ff37]573 output << mangleName( variableExpr->get_var() );
[51587aa]574 } else {
575 addressExpr->get_arg()->accept( *this );
576 } // if
[6c4ff37]577 output << ")";
[51587aa]578 }
579
[8688ce1]580 void CodeGenerator::visit( CastExpr * castExpr ) {
[e04ef3a]581 extension( castExpr );
[803deb1]582 output << "(";
[906e24d]583 if ( castExpr->get_result()->isVoid() ) {
[803deb1]584 output << "(void)" ;
[615a096]585 } else if ( ! castExpr->get_result()->get_lvalue() ) {
[803deb1]586 // at least one result type of cast, but not an lvalue
587 output << "(";
[e39241b]588 output << genType( castExpr->get_result(), "", pretty, genC );
[71f4e4f]589 output << ")";
[803deb1]590 } else {
[8e9cbb2]591 // otherwise, the cast is to an lvalue type, so the cast should be dropped, since the result of a cast is
[803deb1]592 // never an lvalue in C
[3778cb2]593 } // if
[803deb1]594 castExpr->get_arg()->accept( *this );
595 output << ")";
[51587aa]596 }
[71f4e4f]597
[8688ce1]598 void CodeGenerator::visit( UntypedMemberExpr * memberExpr ) {
[e39241b]599 assertf( ! genC, "UntypedMemberExpr should not reach code generation." );
600 extension( memberExpr );
601 memberExpr->get_aggregate()->accept( *this );
[5f642e38]602 output << ".";
603 memberExpr->get_member()->accept( *this );
[51587aa]604 }
[71f4e4f]605
[8688ce1]606 void CodeGenerator::visit( MemberExpr * memberExpr ) {
[e04ef3a]607 extension( memberExpr );
[51587aa]608 memberExpr->get_aggregate()->accept( *this );
[6c4ff37]609 output << "." << mangleName( memberExpr->get_member() );
[51587aa]610 }
[71f4e4f]611
[8688ce1]612 void CodeGenerator::visit( VariableExpr * variableExpr ) {
[e04ef3a]613 extension( variableExpr );
[51587aa]614 OperatorInfo opInfo;
615 if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) {
[6c4ff37]616 output << opInfo.symbol;
[51587aa]617 } else {
[6c4ff37]618 output << mangleName( variableExpr->get_var() );
[51587aa]619 } // if
620 }
[71f4e4f]621
[8688ce1]622 void CodeGenerator::visit( ConstantExpr * constantExpr ) {
[51587aa]623 assert( constantExpr->get_constant() );
[e04ef3a]624 extension( constantExpr );
[51587aa]625 constantExpr->get_constant()->accept( *this );
626 }
[71f4e4f]627
[8688ce1]628 void CodeGenerator::visit( SizeofExpr * sizeofExpr ) {
[e04ef3a]629 extension( sizeofExpr );
[6c4ff37]630 output << "sizeof(";
[51587aa]631 if ( sizeofExpr->get_isType() ) {
[e39241b]632 output << genType( sizeofExpr->get_type(), "", pretty, genC );
[51587aa]633 } else {
634 sizeofExpr->get_expr()->accept( *this );
635 } // if
[6c4ff37]636 output << ")";
[51587aa]637 }
[47534159]638
[8688ce1]639 void CodeGenerator::visit( AlignofExpr * alignofExpr ) {
[47534159]640 // use GCC extension to avoid bumping std to C11
[8e9cbb2]641 extension( alignofExpr );
[47534159]642 output << "__alignof__(";
[25a054f]643 if ( alignofExpr->get_isType() ) {
[e39241b]644 output << genType( alignofExpr->get_type(), "", pretty, genC );
[47534159]645 } else {
[25a054f]646 alignofExpr->get_expr()->accept( *this );
[47534159]647 } // if
648 output << ")";
649 }
[71f4e4f]650
[8688ce1]651 void CodeGenerator::visit( UntypedOffsetofExpr * offsetofExpr ) {
[e39241b]652 assertf( ! genC, "UntypedOffsetofExpr should not reach code generation." );
653 output << "offsetof(";
654 output << genType( offsetofExpr->get_type(), "", pretty, genC );
655 output << ", " << offsetofExpr->get_member();
656 output << ")";
[2a4b088]657 }
658
[8688ce1]659 void CodeGenerator::visit( OffsetofExpr * offsetofExpr ) {
[25a054f]660 // use GCC builtin
661 output << "__builtin_offsetof(";
[e39241b]662 output << genType( offsetofExpr->get_type(), "", pretty, genC );
[e551c69]663 output << ", " << mangleName( offsetofExpr->get_member() );
[25a054f]664 output << ")";
665 }
[d63eeb0]666
[8688ce1]667 void CodeGenerator::visit( OffsetPackExpr * offsetPackExpr ) {
[e39241b]668 assertf( ! genC, "OffsetPackExpr should not reach code generation." );
669 output << "__CFA_offsetpack(" << genType( offsetPackExpr->get_type(), "", pretty, genC ) << ")";
[afc1045]670 }
[70a06f6]671
[8688ce1]672 void CodeGenerator::visit( LogicalExpr * logicalExpr ) {
[e04ef3a]673 extension( logicalExpr );
[6c4ff37]674 output << "(";
[51587aa]675 logicalExpr->get_arg1()->accept( *this );
676 if ( logicalExpr->get_isAnd() ) {
[6c4ff37]677 output << " && ";
[51587aa]678 } else {
[6c4ff37]679 output << " || ";
[51587aa]680 } // if
681 logicalExpr->get_arg2()->accept( *this );
[6c4ff37]682 output << ")";
[51587aa]683 }
[71f4e4f]684
[8688ce1]685 void CodeGenerator::visit( ConditionalExpr * conditionalExpr ) {
[e04ef3a]686 extension( conditionalExpr );
[6c4ff37]687 output << "(";
[51587aa]688 conditionalExpr->get_arg1()->accept( *this );
[6c4ff37]689 output << " ? ";
[51587aa]690 conditionalExpr->get_arg2()->accept( *this );
[6c4ff37]691 output << " : ";
[51587aa]692 conditionalExpr->get_arg3()->accept( *this );
[6c4ff37]693 output << ")";
[51587aa]694 }
[71f4e4f]695
[8688ce1]696 void CodeGenerator::visit( CommaExpr * commaExpr ) {
[e04ef3a]697 extension( commaExpr );
[6c4ff37]698 output << "(";
[51587aa]699 commaExpr->get_arg1()->accept( *this );
[6c4ff37]700 output << " , ";
[51587aa]701 commaExpr->get_arg2()->accept( *this );
[6c4ff37]702 output << ")";
[51587aa]703 }
[71f4e4f]704
[e39241b]705 void CodeGenerator::visit( UntypedTupleExpr * tupleExpr ) {
706 assertf( ! genC, "UntypedTupleExpr should not reach code generation." );
[f975c65]707 extension( tupleExpr );
[e39241b]708 output << "[";
709 genCommaList( tupleExpr->get_exprs().begin(), tupleExpr->get_exprs().end() );
710 output << "]";
711 }
[907eccb]712
[e39241b]713 void CodeGenerator::visit( TupleExpr * tupleExpr ) {
714 assertf( ! genC, "TupleExpr should not reach code generation." );
[f975c65]715 extension( tupleExpr );
[e39241b]716 output << "[";
717 genCommaList( tupleExpr->get_exprs().begin(), tupleExpr->get_exprs().end() );
718 output << "]";
719 }
[71f4e4f]720
[f975c65]721 void CodeGenerator::visit( TupleIndexExpr * tupleExpr ) {
722 assertf( ! genC, "TupleIndexExpr should not reach code generation." );
723 extension( tupleExpr );
724 tupleExpr->get_tuple()->accept( *this );
725 output << "." << tupleExpr->get_index();
726 }
727
[e39241b]728 void CodeGenerator::visit( TypeExpr * typeExpr ) {
[e4d829b]729 // if ( genC ) std::cerr << "typeexpr still exists: " << typeExpr << std::endl;
730 // assertf( ! genC, "TypeExpr should not reach code generation." );
731 if ( ! genC ) {
732 output<< genType( typeExpr->get_type(), "", pretty, genC );
733 }
[e39241b]734 }
[2b6c1e0]735
[8688ce1]736 void CodeGenerator::visit( AsmExpr * asmExpr ) {
[7f5566b]737 if ( asmExpr->get_inout() ) {
738 output << "[ ";
739 asmExpr->get_inout()->accept( *this );
740 output << " ] ";
741 } // if
742 asmExpr->get_constraint()->accept( *this );
743 output << " ( ";
744 asmExpr->get_operand()->accept( *this );
745 output << " )";
746 }
747
[3c13c03]748 void CodeGenerator::visit( CompoundLiteralExpr *compLitExpr ) {
[fbcde64]749 assert( compLitExpr->get_result() && dynamic_cast< ListInit * > ( compLitExpr->get_initializer() ) );
[e39241b]750 output << "(" << genType( compLitExpr->get_result(), "", pretty, genC ) << ")";
[3c13c03]751 compLitExpr->get_initializer()->accept( *this );
752 }
753
[6eb8948]754 void CodeGenerator::visit( StmtExpr * stmtExpr ) {
[3c13c03]755 std::list< Statement * > & stmts = stmtExpr->get_statements()->get_kids();
[4810867]756 output << lineDirective( stmtExpr) << "({" << std::endl;
[3c13c03]757 cur_indent += CodeGenerator::tabsize;
758 unsigned int numStmts = stmts.size();
759 unsigned int i = 0;
760 for ( Statement * stmt : stmts ) {
[4810867]761 output << lineDirective( stmt ) << indent;
762 output << printLabels( stmt->get_labels() );
[3c13c03]763 if ( i+1 == numStmts ) {
764 // last statement in a statement expression needs to be handled specially -
765 // cannot cast to void, otherwise the expression statement has no value
766 if ( ExprStmt * exprStmt = dynamic_cast< ExprStmt * >( stmt ) ) {
767 exprStmt->get_expr()->accept( *this );
768 output << ";" << endl;
769 ++i;
770 break;
771 }
772 }
773 stmt->accept( *this );
774 output << endl;
775 if ( wantSpacing( stmt ) ) {
776 output << endl;
777 } // if
778 ++i;
779 }
780 cur_indent -= CodeGenerator::tabsize;
781 output << indent << "})";
[6eb8948]782 }
783
[4810867]784 // *** Statements
[8688ce1]785 void CodeGenerator::visit( CompoundStmt * compoundStmt ) {
[51587aa]786 std::list<Statement*> ks = compoundStmt->get_kids();
[2b6c1e0]787 output << "{" << endl;
[51587aa]788
[2b6c1e0]789 cur_indent += CodeGenerator::tabsize;
[51587aa]790
[7f5566b]791 for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) {
[cda48b6]792 output << indent << printLabels( (*i)->get_labels() );
[7f5566b]793 (*i)->accept( *this );
[2b6c1e0]794
[6c4ff37]795 output << endl;
[2b6c1e0]796 if ( wantSpacing( *i ) ) {
797 output << endl;
[3778cb2]798 } // if
[8688ce1]799 } // for
[71f4e4f]800 cur_indent -= CodeGenerator::tabsize;
[51587aa]801
[cda48b6]802 output << indent << "}";
[51587aa]803 }
804
[8688ce1]805 void CodeGenerator::visit( ExprStmt * exprStmt ) {
[6c4ff37]806 assert( exprStmt );
[262f085f]807 Expression * expr = exprStmt->get_expr();
808 if ( genC ) {
809 // cast the top-level expression to void to reduce gcc warnings.
810 expr = new CastExpr( expr );
811 }
[321a2481]812 expr->accept( *this );
813 output << ";";
[51587aa]814 }
815
[8688ce1]816 void CodeGenerator::visit( AsmStmt * asmStmt ) {
[7f5566b]817 output << "asm ";
818 if ( asmStmt->get_voltile() ) output << "volatile ";
819 if ( ! asmStmt->get_gotolabels().empty() ) output << "goto ";
820 output << "( ";
821 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
822 output << " : ";
823 genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() );
824 output << " : ";
825 genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() );
826 output << " : ";
827 genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() );
828 if ( ! asmStmt->get_gotolabels().empty() ) {
829 output << " : ";
830 for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) {
831 output << *begin++;
832 if ( begin == asmStmt->get_gotolabels().end() ) break;
833 output << ", ";
834 } // for
835 } // if
836 output << " );" ;
837 }
838
[e994912]839 void CodeGenerator::visit( AsmDecl * asmDecl ) {
840 output << "asm ";
841 AsmStmt * asmStmt = asmDecl->get_stmt();
842 output << "( ";
843 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
844 output << " )" ;
845 }
846
[8688ce1]847 void CodeGenerator::visit( IfStmt * ifStmt ) {
[4810867]848 output << lineDirective( ifStmt );
[7f5566b]849 output << "if ( ";
850 ifStmt->get_condition()->accept( *this );
851 output << " ) ";
[51587aa]852
[7f5566b]853 ifStmt->get_thenPart()->accept( *this );
[51587aa]854
855 if ( ifStmt->get_elsePart() != 0) {
[2b6c1e0]856 output << " else ";
[7f5566b]857 ifStmt->get_elsePart()->accept( *this );
[51587aa]858 } // if
859 }
860
[8688ce1]861 void CodeGenerator::visit( SwitchStmt * switchStmt ) {
[4810867]862 output << lineDirective( switchStmt );
[7f5566b]863 output << "switch ( " ;
864 switchStmt->get_condition()->accept( *this );
865 output << " ) ";
[71f4e4f]866
[2b6c1e0]867 output << "{" << std::endl;
[6c4ff37]868 cur_indent += CodeGenerator::tabsize;
[8688ce1]869 acceptAll( switchStmt->get_statements(), *this );
[6c4ff37]870 cur_indent -= CodeGenerator::tabsize;
[cda48b6]871 output << indent << "}";
[51587aa]872 }
873
[8688ce1]874 void CodeGenerator::visit( CaseStmt * caseStmt ) {
[4810867]875 output << lineDirective( caseStmt );
[cda48b6]876 output << indent;
[eb3261f]877 if ( caseStmt->isDefault()) {
[2b6c1e0]878 output << "default";
[eb3261f]879 } else {
[2b6c1e0]880 output << "case ";
[7f5566b]881 caseStmt->get_condition()->accept( *this );
[17cd4eb]882 } // if
[6c4ff37]883 output << ":\n";
[71f4e4f]884
[51587aa]885 std::list<Statement *> sts = caseStmt->get_statements();
886
[6c4ff37]887 cur_indent += CodeGenerator::tabsize;
[51587aa]888 for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) {
[cda48b6]889 output << indent << printLabels( (*i)->get_labels() ) ;
[7f5566b]890 (*i)->accept( *this );
[6c4ff37]891 output << endl;
[3778cb2]892 } // for
[6c4ff37]893 cur_indent -= CodeGenerator::tabsize;
[51587aa]894 }
895
[8688ce1]896 void CodeGenerator::visit( BranchStmt * branchStmt ) {
[51587aa]897 switch ( branchStmt->get_type()) {
898 case BranchStmt::Goto:
899 if ( ! branchStmt->get_target().empty() )
[6c4ff37]900 output << "goto " << branchStmt->get_target();
[71f4e4f]901 else {
[51587aa]902 if ( branchStmt->get_computedTarget() != 0 ) {
[6c4ff37]903 output << "goto *";
[51587aa]904 branchStmt->get_computedTarget()->accept( *this );
905 } // if
906 } // if
907 break;
908 case BranchStmt::Break:
[6c4ff37]909 output << "break";
[51587aa]910 break;
911 case BranchStmt::Continue:
[6c4ff37]912 output << "continue";
[51587aa]913 break;
[3778cb2]914 } // switch
[2b6c1e0]915 output << ";";
[51587aa]916 }
917
[8688ce1]918 void CodeGenerator::visit( ReturnStmt * returnStmt ) {
[6c4ff37]919 output << "return ";
[4b2589a]920 maybeAccept( returnStmt->get_expr(), *this );
[6c4ff37]921 output << ";";
[51587aa]922 }
923
[daf1af8]924 void CodeGenerator::visit( ThrowStmt * throwStmt ) {
925 assertf( ! genC, "Throw statements should not reach code generation." );
926
927 output << ((throwStmt->get_kind() == ThrowStmt::Terminate) ?
928 "throw" : "throwResume");
929 if (throwStmt->get_expr()) {
930 output << " ";
931 throwStmt->get_expr()->accept( *this );
932 }
933 if (throwStmt->get_target()) {
934 output << " _At ";
935 throwStmt->get_target()->accept( *this );
936 }
937 output << ";";
938 }
939
[8688ce1]940 void CodeGenerator::visit( WhileStmt * whileStmt ) {
[321a2481]941 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]942 output << "do" ;
[321a2481]943 } else {
[6c4ff37]944 output << "while (" ;
[7f5566b]945 whileStmt->get_condition()->accept( *this );
[6c4ff37]946 output << ")";
[51587aa]947 } // if
[2b6c1e0]948 output << " ";
[51587aa]949
[2b6c1e0]950 output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() );
[51587aa]951 whileStmt->get_body()->accept( *this );
952
[cda48b6]953 output << indent;
[51587aa]954
955 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]956 output << " while (" ;
[7f5566b]957 whileStmt->get_condition()->accept( *this );
[6c4ff37]958 output << ");";
[51587aa]959 } // if
960 }
961
[8688ce1]962 void CodeGenerator::visit( ForStmt * forStmt ) {
[8e9cbb2]963 // initialization is always hoisted, so don't bother doing anything with that
[145f1fc]964 output << "for (;";
[51587aa]965
[321a2481]966 if ( forStmt->get_condition() != 0 ) {
[51587aa]967 forStmt->get_condition()->accept( *this );
[3778cb2]968 } // if
[6c4ff37]969 output << ";";
[51587aa]970
[321a2481]971 if ( forStmt->get_increment() != 0 ) {
972 // cast the top-level expression to void to reduce gcc warnings.
973 Expression * expr = new CastExpr( forStmt->get_increment() );
974 expr->accept( *this );
[3778cb2]975 } // if
[2b6c1e0]976 output << ") ";
[51587aa]977
978 if ( forStmt->get_body() != 0 ) {
[2b6c1e0]979 output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() );
[51587aa]980 forStmt->get_body()->accept( *this );
981 } // if
982 }
983
[7e003011]984 void CodeGenerator::visit( __attribute__((unused)) NullStmt * nullStmt ) {
[cda48b6]985 //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() );
[6c4ff37]986 output << "/* null statement */ ;";
[51587aa]987 }
988
[8688ce1]989 void CodeGenerator::visit( DeclStmt * declStmt ) {
[51587aa]990 declStmt->get_decl()->accept( *this );
[71f4e4f]991
[51587aa]992 if ( doSemicolon( declStmt->get_decl() ) ) {
[6c4ff37]993 output << ";";
[51587aa]994 } // if
995 }
996
[dd020c0]997 void CodeGenerator::handleStorageClass( DeclarationWithType * decl ) {
[fb04321]998 if ( decl->get_storageClasses().any() ) {
[6e8bd43]999 decl->get_storageClasses().print( output );
[a7c90d4]1000 } // if
[dd020c0]1001 } // CodeGenerator::handleStorageClass
[9facf3b]1002
1003 std::string genName( DeclarationWithType * decl ) {
1004 CodeGen::OperatorInfo opInfo;
1005 if ( operatorLookup( decl->get_name(), opInfo ) ) {
1006 return opInfo.outputName;
1007 } else {
1008 return decl->get_name();
1009 } // if
1010 }
[51b73452]1011} // namespace CodeGen
[51587aa]1012
1013// Local Variables: //
1014// tab-width: 4 //
1015// mode: c++ //
1016// compile-command: "make install" //
1017// End: //
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