source: src/CodeGen/CodeGenerator.cc@ c5e3208

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 c5e3208 was f7cb0bc, checked in by Rob Schluntz <rschlunt@…>, 8 years ago

refactor indenter from CodeGen and CurrentObject
  • 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 CodeGenerator::LabelPrinter & CodeGenerator::LabelPrinter::operator()( std::list< Label > & l ) {
69 labels = &l;
70 return *this;
71 }
72
[8688ce1]73 ostream & operator<<( ostream & output, CodeGenerator::LabelPrinter & printLabels ) {
[888cbe4]74 std::list< Label > & labs = *printLabels.labels;
75 // l.unique(); // assumes a sorted list. Why not use set? Does order matter?
76 for ( Label & l : labs ) {
77 output << l.get_name() + ": ";
78 printLabels.cg.genAttributes( l.get_attributes() );
[8688ce1]79 } // for
[888cbe4]80 return output;
81 }
82
[c850687]83 CodeGenerator::LineMarker::LineMarker(
84 CodeLocation const & loc, bool toPrint) :
85 loc(loc), toPrint(toPrint)
86 {}
87
88 CodeGenerator::LineMarker CodeGenerator::lineDirective(
89 BaseSyntaxNode const * node) {
90 return LineMarker(node->location, lineMarks);
91 }
92
93 std::ostream & operator<<(std::ostream & out,
94 CodeGenerator::LineMarker const & marker) {
95 if (marker.toPrint && marker.loc.isSet()) {
96 return out << "\n# " << marker.loc.linenumber << " \""
97 << marker.loc.filename << "\"\n";
98 } else if (marker.toPrint) {
99 return out << "\n/* Missing CodeLocation */\n";
100 } else {
101 return out;
102 }
103 }
104
[f7cb0bc]105 CodeGenerator::CodeGenerator( std::ostream & os, bool pretty, bool genC, bool lineMarks ) : indent( CodeGenerator::tabsize ), insideFunction( false ), output( os ), printLabels( *this ), pretty( pretty ), genC( genC ), lineMarks( lineMarks ) {}
[cda48b6]106
[486341f]107 string CodeGenerator::mangleName( DeclarationWithType * decl ) {
[35b1bf4]108 if ( pretty ) return decl->get_name();
[51587aa]109 if ( decl->get_mangleName() != "" ) {
[f326f99]110 // need to incorporate scope level in order to differentiate names for destructors
111 return decl->get_scopedMangleName();
[51587aa]112 } else {
113 return decl->get_name();
114 } // if
115 }
[94b4364]116
[44a81853]117 void CodeGenerator::genAttributes( list< Attribute * > & attributes ) {
118 if ( attributes.empty() ) return;
119 output << "__attribute__ ((";
120 for ( list< Attribute * >::iterator attr( attributes.begin() );; ) {
121 output << (*attr)->get_name();
122 if ( ! (*attr)->get_parameters().empty() ) {
123 output << "(";
124 genCommaList( (*attr)->get_parameters().begin(), (*attr)->get_parameters().end() );
125 output << ")";
126 } // if
127 if ( ++attr == attributes.end() ) break;
128 output << ","; // separator
129 } // for
130 output << ")) ";
131 } // CodeGenerator::genAttributes
[7baed7d]132
133
[4810867]134 // *** Declarations
[8688ce1]135 void CodeGenerator::visit( FunctionDecl * functionDecl ) {
[8e9cbb2]136 extension( functionDecl );
[7baed7d]137 genAttributes( functionDecl->get_attributes() );
138
[51587aa]139 handleStorageClass( functionDecl );
[6e8bd43]140 functionDecl->get_funcSpec().print( output );
[dd020c0]141
[e39241b]142 output << genType( functionDecl->get_functionType(), mangleName( functionDecl ), pretty, genC );
[51587aa]143
[58dd019]144 asmName( functionDecl );
145
[51587aa]146 // acceptAll( functionDecl->get_oldDecls(), *this );
147 if ( functionDecl->get_statements() ) {
[7f5566b]148 functionDecl->get_statements()->accept( *this );
[51587aa]149 } // if
150 }
151
[8688ce1]152 void CodeGenerator::visit( ObjectDecl * objectDecl ) {
[e39241b]153 if (objectDecl->get_name().empty() && genC ) {
154 // only generate an anonymous name when generating C code, otherwise it clutters the output too much
[d9c8a59]155 static UniqueName name = { "__anonymous_object" };
156 objectDecl->set_name( name.newName() );
157 }
158
[8e9cbb2]159 extension( objectDecl );
[f9cebb5]160 genAttributes( objectDecl->get_attributes() );
161
[51587aa]162 handleStorageClass( objectDecl );
[e39241b]163 output << genType( objectDecl->get_type(), mangleName( objectDecl ), pretty, genC );
[71f4e4f]164
[58dd019]165 asmName( objectDecl );
166
[51587aa]167 if ( objectDecl->get_init() ) {
[6c4ff37]168 output << " = ";
[51587aa]169 objectDecl->get_init()->accept( *this );
170 } // if
[3778cb2]171
[51587aa]172 if ( objectDecl->get_bitfieldWidth() ) {
[6c4ff37]173 output << ":";
[51587aa]174 objectDecl->get_bitfieldWidth()->accept( *this );
175 } // if
176 }
177
[5f642e38]178 void CodeGenerator::handleAggregate( AggregateDecl * aggDecl, const std::string & kind ) {
[c0aa336]179 genAttributes( aggDecl->get_attributes() );
[35b1bf4]180
[e39241b]181 if( ! aggDecl->get_parameters().empty() && ! genC ) {
182 // assertf( ! genC, "Aggregate type parameters should not reach code generation." );
183 output << "forall(";
184 genCommaList( aggDecl->get_parameters().begin(), aggDecl->get_parameters().end() );
185 output << ")" << endl;
186 }
187
[29cf9c8]188 output << kind;
[51587aa]189 if ( aggDecl->get_name() != "" )
[6c4ff37]190 output << aggDecl->get_name();
[71f4e4f]191
[2c57025]192 if ( aggDecl->has_body() ) {
193 std::list< Declaration * > & memb = aggDecl->get_members();
[94b4364]194 output << " {" << endl;
[51587aa]195
[f7cb0bc]196 ++indent;
[3778cb2]197 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++ ) {
[4810867]198 output << lineDirective( *i ) << indent;
[7f5566b]199 (*i)->accept( *this );
[6c4ff37]200 output << ";" << endl;
[3778cb2]201 } // for
[51587aa]202
[f7cb0bc]203 --indent;
[51587aa]204
[cda48b6]205 output << indent << "}";
[17cd4eb]206 } // if
[51587aa]207 }
[17cd4eb]208
[8688ce1]209 void CodeGenerator::visit( StructDecl * structDecl ) {
[8e9cbb2]210 extension( structDecl );
[5f642e38]211 handleAggregate( structDecl, "struct " );
[51587aa]212 }
[17cd4eb]213
[8688ce1]214 void CodeGenerator::visit( UnionDecl * unionDecl ) {
[8e9cbb2]215 extension( unionDecl );
[5f642e38]216 handleAggregate( unionDecl, "union " );
[51587aa]217 }
[71f4e4f]218
[8688ce1]219 void CodeGenerator::visit( EnumDecl * enumDecl ) {
[8e9cbb2]220 extension( enumDecl );
[4810867]221 output << lineDirective ( enumDecl );
[6c4ff37]222 output << "enum ";
[c0aa336]223 genAttributes( enumDecl->get_attributes() );
[51587aa]224
[8e9cbb2]225 if ( enumDecl->get_name() != "" )
226 output << enumDecl->get_name();
[71f4e4f]227
[8e9cbb2]228 std::list< Declaration* > &memb = enumDecl->get_members();
[51587aa]229
230 if ( ! memb.empty() ) {
[cda48b6]231 output << " {" << endl;
[51587aa]232
[f7cb0bc]233 ++indent;
[51587aa]234 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) {
[8688ce1]235 ObjectDecl * obj = dynamic_cast< ObjectDecl* >( *i );
[51587aa]236 assert( obj );
[4810867]237 output << lineDirective( obj ) << indent << mangleName( obj );
[51587aa]238 if ( obj->get_init() ) {
[6c4ff37]239 output << " = ";
[7f5566b]240 obj->get_init()->accept( *this );
[51587aa]241 } // if
[6c4ff37]242 output << "," << endl;
[51587aa]243 } // for
244
[f7cb0bc]245 --indent;
[51587aa]246
[cda48b6]247 output << indent << "}";
[51587aa]248 } // if
249 }
[71f4e4f]250
[7e003011]251 void CodeGenerator::visit( __attribute__((unused)) TraitDecl * traitDecl ) {}
[71f4e4f]252
[8688ce1]253 void CodeGenerator::visit( TypedefDecl * typeDecl ) {
[e39241b]254 assertf( ! genC, "Typedefs are removed and substituted in earlier passes." );
[4810867]255 output << lineDirective( typeDecl );
[e39241b]256 output << "typedef ";
257 output << genType( typeDecl->get_base(), typeDecl->get_name(), pretty, genC ) << endl;
[51587aa]258 }
[71f4e4f]259
[8688ce1]260 void CodeGenerator::visit( TypeDecl * typeDecl ) {
[e39241b]261 if ( genC ) {
262 // really, we should mutate this into something that isn't a TypeDecl but that requires large-scale changes,
263 // still to be done
264 extension( typeDecl );
265 output << "extern unsigned long " << typeDecl->get_name();
266 if ( typeDecl->get_base() ) {
267 output << " = sizeof( " << genType( typeDecl->get_base(), "", pretty, genC ) << " )";
268 } // if
269 } else {
[bdd0755]270 output << typeDecl->genTypeString() << " " << typeDecl->get_name();
271 if ( typeDecl->get_kind() != TypeDecl::Any && typeDecl->get_sized() ) {
272 output << " | sized(" << typeDecl->get_name() << ")";
273 }
[e39241b]274 if ( ! typeDecl->get_assertions().empty() ) {
275 output << " | { ";
276 genCommaList( typeDecl->get_assertions().begin(), typeDecl->get_assertions().end() );
277 output << " }";
278 }
279 }
[51587aa]280 }
281
[e4d829b]282 void CodeGenerator::visit( Designation * designation ) {
283 std::list< Expression * > designators = designation->get_designators();
[e45215c]284 if ( designators.size() == 0 ) return;
[e4d829b]285 for ( Expression * des : designators ) {
[62423350]286 if ( dynamic_cast< NameExpr * >( des ) || dynamic_cast< VariableExpr * >( des ) ) {
287 // if expression is a NameExpr or VariableExpr, then initializing aggregate member
288 output << ".";
[e4d829b]289 des->accept( *this );
290 } else {
[62423350]291 // otherwise, it has to be a ConstantExpr or CastExpr, initializing array eleemnt
292 output << "[";
[e4d829b]293 des->accept( *this );
[62423350]294 output << "]";
[3778cb2]295 } // if
296 } // for
[e45215c]297 output << " = ";
298 }
299
[8688ce1]300 void CodeGenerator::visit( SingleInit * init ) {
[51587aa]301 init->get_value()->accept( *this );
302 }
303
[8688ce1]304 void CodeGenerator::visit( ListInit * init ) {
[e4d829b]305 auto initBegin = init->begin();
306 auto initEnd = init->end();
307 auto desigBegin = init->get_designations().begin();
308 auto desigEnd = init->get_designations().end();
309
[6c4ff37]310 output << "{ ";
[e4d829b]311 for ( ; initBegin != initEnd && desigBegin != desigEnd; ) {
312 (*desigBegin)->accept( *this );
313 (*initBegin)->accept( *this );
314 ++initBegin, ++desigBegin;
315 if ( initBegin != initEnd ) {
316 output << ", ";
317 }
318 }
[6c4ff37]319 output << " }";
[e4d829b]320 assertf( initBegin == initEnd && desigBegin == desigEnd, "Initializers and designators not the same length. %s", toString( init ).c_str() );
[51587aa]321 }
322
[7e003011]323 void CodeGenerator::visit( __attribute__((unused)) ConstructorInit * init ){
[e39241b]324 assertf( ! genC, "ConstructorInit nodes should not reach code generation." );
325 // xxx - generate something reasonable for constructor/destructor pairs
326 output << "<ctorinit>";
[fc638d2]327 }
328
[8688ce1]329 void CodeGenerator::visit( Constant * constant ) {
[6c4ff37]330 output << constant->get_value() ;
[51587aa]331 }
332
[4810867]333 // *** Expressions
[8688ce1]334 void CodeGenerator::visit( ApplicationExpr * applicationExpr ) {
[e04ef3a]335 extension( applicationExpr );
[8688ce1]336 if ( VariableExpr * varExpr = dynamic_cast< VariableExpr* >( applicationExpr->get_function() ) ) {
[51587aa]337 OperatorInfo opInfo;
338 if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( varExpr->get_var()->get_name(), opInfo ) ) {
339 std::list< Expression* >::iterator arg = applicationExpr->get_args().begin();
340 switch ( opInfo.type ) {
341 case OT_PREFIXASSIGN:
342 case OT_POSTFIXASSIGN:
343 case OT_INFIXASSIGN:
[356189a]344 case OT_CTOR:
[c2ce2350]345 case OT_DTOR:
[51587aa]346 {
347 assert( arg != applicationExpr->get_args().end() );
[8688ce1]348 if ( AddressExpr * addrExpr = dynamic_cast< AddressExpr * >( *arg ) ) {
[356189a]349 // remove & from first assignment/ctor argument
[51587aa]350 *arg = addrExpr->get_arg();
351 } else {
[356189a]352 // no address-of operator, so must be a pointer - add dereference
[066d77a]353 // NOTE: if the assertion starts to trigger, check that the application expr isn't being shared.
354 // Since its arguments are modified here, this assertion most commonly triggers when the application
355 // is visited multiple times.
[8688ce1]356 UntypedExpr * newExpr = new UntypedExpr( new NameExpr( "*?" ) );
[51587aa]357 newExpr->get_args().push_back( *arg );
[906e24d]358 Type * type = InitTweak::getPointerBase( (*arg)->get_result() );
[066d77a]359 assertf( type, "First argument to a derefence must be a pointer. Ensure that expressions are not being shared." );
[906e24d]360 newExpr->set_result( type->clone() );
[51587aa]361 *arg = newExpr;
362 } // if
363 break;
364 }
[71f4e4f]365
[51587aa]366 default:
367 // do nothing
368 ;
[3778cb2]369 } // switch
[71f4e4f]370
[51587aa]371 switch ( opInfo.type ) {
372 case OT_INDEX:
373 assert( applicationExpr->get_args().size() == 2 );
374 (*arg++)->accept( *this );
[6c4ff37]375 output << "[";
[51587aa]376 (*arg)->accept( *this );
[6c4ff37]377 output << "]";
[51587aa]378 break;
[71f4e4f]379
[51587aa]380 case OT_CALL:
[356189a]381 // there are no intrinsic definitions of the function call operator
[51587aa]382 assert( false );
383 break;
[71f4e4f]384
[f1e012b]385 case OT_CTOR:
[c2ce2350]386 case OT_DTOR:
[356189a]387 if ( applicationExpr->get_args().size() == 1 ) {
[8e9cbb2]388 // the expression fed into a single parameter constructor or destructor may contain side
389 // effects, so must still output this expression
[64071c2]390 output << "(";
[356189a]391 (*arg++)->accept( *this );
[64071c2]392 output << ") /* " << opInfo.inputName << " */";
[356189a]393 } else if ( applicationExpr->get_args().size() == 2 ) {
[c2ce2350]394 // intrinsic two parameter constructors are essentially bitwise assignment
[356189a]395 output << "(";
396 (*arg++)->accept( *this );
397 output << opInfo.symbol;
398 (*arg)->accept( *this );
[c2ce2350]399 output << ") /* " << opInfo.inputName << " */";
[356189a]400 } else {
[c2ce2350]401 // no constructors with 0 or more than 2 parameters
[356189a]402 assert( false );
[8688ce1]403 } // if
[356189a]404 break;
[f1e012b]405
[51587aa]406 case OT_PREFIX:
407 case OT_PREFIXASSIGN:
408 assert( applicationExpr->get_args().size() == 1 );
[6c4ff37]409 output << "(";
410 output << opInfo.symbol;
[51587aa]411 (*arg)->accept( *this );
[6c4ff37]412 output << ")";
[51587aa]413 break;
[71f4e4f]414
[51587aa]415 case OT_POSTFIX:
416 case OT_POSTFIXASSIGN:
417 assert( applicationExpr->get_args().size() == 1 );
418 (*arg)->accept( *this );
[6c4ff37]419 output << opInfo.symbol;
[51587aa]420 break;
421
[f1e012b]422
[51587aa]423 case OT_INFIX:
424 case OT_INFIXASSIGN:
425 assert( applicationExpr->get_args().size() == 2 );
[6c4ff37]426 output << "(";
[51587aa]427 (*arg++)->accept( *this );
[6c4ff37]428 output << opInfo.symbol;
[51587aa]429 (*arg)->accept( *this );
[6c4ff37]430 output << ")";
[51587aa]431 break;
[71f4e4f]432
[51587aa]433 case OT_CONSTANT:
[721f17a]434 case OT_LABELADDRESS:
435 // there are no intrinsic definitions of 0/1 or label addresses as functions
[51587aa]436 assert( false );
[3778cb2]437 } // switch
[17cd4eb]438 } else {
[51587aa]439 varExpr->accept( *this );
[6c4ff37]440 output << "(";
[51587aa]441 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]442 output << ")";
[17cd4eb]443 } // if
[51587aa]444 } else {
445 applicationExpr->get_function()->accept( *this );
[6c4ff37]446 output << "(";
[51587aa]447 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]448 output << ")";
[51587aa]449 } // if
450 }
[71f4e4f]451
[8688ce1]452 void CodeGenerator::visit( UntypedExpr * untypedExpr ) {
[e04ef3a]453 extension( untypedExpr );
[8688ce1]454 if ( NameExpr * nameExpr = dynamic_cast< NameExpr* >( untypedExpr->get_function() ) ) {
[51587aa]455 OperatorInfo opInfo;
456 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
457 std::list< Expression* >::iterator arg = untypedExpr->get_args().begin();
458 switch ( opInfo.type ) {
459 case OT_INDEX:
460 assert( untypedExpr->get_args().size() == 2 );
461 (*arg++)->accept( *this );
[6c4ff37]462 output << "[";
[51587aa]463 (*arg)->accept( *this );
[6c4ff37]464 output << "]";
[51587aa]465 break;
[71f4e4f]466
[51587aa]467 case OT_CALL:
[f1e012b]468 assert( false );
469
[c2ce2350]470 case OT_CTOR:
471 case OT_DTOR:
472 if ( untypedExpr->get_args().size() == 1 ) {
[8e9cbb2]473 // the expression fed into a single parameter constructor or destructor may contain side
474 // effects, so must still output this expression
[64071c2]475 output << "(";
[c2ce2350]476 (*arg++)->accept( *this );
[64071c2]477 output << ") /* " << opInfo.inputName << " */";
[c2ce2350]478 } else if ( untypedExpr->get_args().size() == 2 ) {
479 // intrinsic two parameter constructors are essentially bitwise assignment
480 output << "(";
481 (*arg++)->accept( *this );
482 output << opInfo.symbol;
483 (*arg)->accept( *this );
484 output << ") /* " << opInfo.inputName << " */";
485 } else {
486 // no constructors with 0 or more than 2 parameters
487 assert( false );
[3778cb2]488 } // if
[51587aa]489 break;
[71f4e4f]490
[51587aa]491 case OT_PREFIX:
492 case OT_PREFIXASSIGN:
[de62360d]493 case OT_LABELADDRESS:
[51587aa]494 assert( untypedExpr->get_args().size() == 1 );
[6c4ff37]495 output << "(";
496 output << opInfo.symbol;
[51587aa]497 (*arg)->accept( *this );
[6c4ff37]498 output << ")";
[51587aa]499 break;
[71f4e4f]500
[51587aa]501 case OT_POSTFIX:
502 case OT_POSTFIXASSIGN:
503 assert( untypedExpr->get_args().size() == 1 );
504 (*arg)->accept( *this );
[6c4ff37]505 output << opInfo.symbol;
[51587aa]506 break;
[71f4e4f]507
[51587aa]508 case OT_INFIX:
509 case OT_INFIXASSIGN:
510 assert( untypedExpr->get_args().size() == 2 );
[6c4ff37]511 output << "(";
[51587aa]512 (*arg++)->accept( *this );
[6c4ff37]513 output << opInfo.symbol;
[51587aa]514 (*arg)->accept( *this );
[6c4ff37]515 output << ")";
[51587aa]516 break;
[71f4e4f]517
[51587aa]518 case OT_CONSTANT:
519 // there are no intrinsic definitions of 0 or 1 as functions
520 assert( false );
[3778cb2]521 } // switch
[51587aa]522 } else {
[8688ce1]523 if ( nameExpr->get_name() == "..." ) { // case V1 ... V2 or case V1~V2
[ac911f4]524 assert( untypedExpr->get_args().size() == 2 );
525 (*untypedExpr->get_args().begin())->accept( *this );
526 output << " ... ";
527 (*--untypedExpr->get_args().end())->accept( *this );
[057b34f]528 } else { // builtin routines
529 nameExpr->accept( *this );
530 output << "(";
531 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
532 output << ")";
[66d12f7]533 } // if
[51587aa]534 } // if
535 } else {
536 untypedExpr->get_function()->accept( *this );
[6c4ff37]537 output << "(";
[51587aa]538 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
[6c4ff37]539 output << ")";
[51587aa]540 } // if
541 }
[71f4e4f]542
[064e3ff]543 void CodeGenerator::visit( RangeExpr * rangeExpr ) {
544 rangeExpr->get_low()->accept( *this );
545 output << " ... ";
546 rangeExpr->get_high()->accept( *this );
547 }
548
[8688ce1]549 void CodeGenerator::visit( NameExpr * nameExpr ) {
[e04ef3a]550 extension( nameExpr );
[51587aa]551 OperatorInfo opInfo;
552 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
553 assert( opInfo.type == OT_CONSTANT );
[6c4ff37]554 output << opInfo.symbol;
[51587aa]555 } else {
[6c4ff37]556 output << nameExpr->get_name();
[51587aa]557 } // if
558 }
[71f4e4f]559
[8688ce1]560 void CodeGenerator::visit( AddressExpr * addressExpr ) {
[e04ef3a]561 extension( addressExpr );
[6c4ff37]562 output << "(&";
[51587aa]563 // this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address
[8688ce1]564 if ( VariableExpr * variableExpr = dynamic_cast< VariableExpr* >( addressExpr->get_arg() ) ) {
[6c4ff37]565 output << mangleName( variableExpr->get_var() );
[51587aa]566 } else {
567 addressExpr->get_arg()->accept( *this );
568 } // if
[6c4ff37]569 output << ")";
[51587aa]570 }
571
[8688ce1]572 void CodeGenerator::visit( CastExpr * castExpr ) {
[e04ef3a]573 extension( castExpr );
[803deb1]574 output << "(";
[906e24d]575 if ( castExpr->get_result()->isVoid() ) {
[803deb1]576 output << "(void)" ;
[615a096]577 } else if ( ! castExpr->get_result()->get_lvalue() ) {
[803deb1]578 // at least one result type of cast, but not an lvalue
579 output << "(";
[e39241b]580 output << genType( castExpr->get_result(), "", pretty, genC );
[71f4e4f]581 output << ")";
[803deb1]582 } else {
[8e9cbb2]583 // otherwise, the cast is to an lvalue type, so the cast should be dropped, since the result of a cast is
[803deb1]584 // never an lvalue in C
[3778cb2]585 } // if
[803deb1]586 castExpr->get_arg()->accept( *this );
587 output << ")";
[51587aa]588 }
[71f4e4f]589
[8688ce1]590 void CodeGenerator::visit( UntypedMemberExpr * memberExpr ) {
[e39241b]591 assertf( ! genC, "UntypedMemberExpr should not reach code generation." );
592 extension( memberExpr );
593 memberExpr->get_aggregate()->accept( *this );
[5f642e38]594 output << ".";
595 memberExpr->get_member()->accept( *this );
[51587aa]596 }
[71f4e4f]597
[8688ce1]598 void CodeGenerator::visit( MemberExpr * memberExpr ) {
[e04ef3a]599 extension( memberExpr );
[51587aa]600 memberExpr->get_aggregate()->accept( *this );
[6c4ff37]601 output << "." << mangleName( memberExpr->get_member() );
[51587aa]602 }
[71f4e4f]603
[8688ce1]604 void CodeGenerator::visit( VariableExpr * variableExpr ) {
[e04ef3a]605 extension( variableExpr );
[51587aa]606 OperatorInfo opInfo;
607 if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) {
[6c4ff37]608 output << opInfo.symbol;
[51587aa]609 } else {
[6c4ff37]610 output << mangleName( variableExpr->get_var() );
[51587aa]611 } // if
612 }
[71f4e4f]613
[8688ce1]614 void CodeGenerator::visit( ConstantExpr * constantExpr ) {
[51587aa]615 assert( constantExpr->get_constant() );
[e04ef3a]616 extension( constantExpr );
[51587aa]617 constantExpr->get_constant()->accept( *this );
618 }
[71f4e4f]619
[8688ce1]620 void CodeGenerator::visit( SizeofExpr * sizeofExpr ) {
[e04ef3a]621 extension( sizeofExpr );
[6c4ff37]622 output << "sizeof(";
[51587aa]623 if ( sizeofExpr->get_isType() ) {
[e39241b]624 output << genType( sizeofExpr->get_type(), "", pretty, genC );
[51587aa]625 } else {
626 sizeofExpr->get_expr()->accept( *this );
627 } // if
[6c4ff37]628 output << ")";
[51587aa]629 }
[47534159]630
[8688ce1]631 void CodeGenerator::visit( AlignofExpr * alignofExpr ) {
[47534159]632 // use GCC extension to avoid bumping std to C11
[8e9cbb2]633 extension( alignofExpr );
[47534159]634 output << "__alignof__(";
[25a054f]635 if ( alignofExpr->get_isType() ) {
[e39241b]636 output << genType( alignofExpr->get_type(), "", pretty, genC );
[47534159]637 } else {
[25a054f]638 alignofExpr->get_expr()->accept( *this );
[47534159]639 } // if
640 output << ")";
641 }
[71f4e4f]642
[8688ce1]643 void CodeGenerator::visit( UntypedOffsetofExpr * offsetofExpr ) {
[e39241b]644 assertf( ! genC, "UntypedOffsetofExpr should not reach code generation." );
645 output << "offsetof(";
646 output << genType( offsetofExpr->get_type(), "", pretty, genC );
647 output << ", " << offsetofExpr->get_member();
648 output << ")";
[2a4b088]649 }
650
[8688ce1]651 void CodeGenerator::visit( OffsetofExpr * offsetofExpr ) {
[25a054f]652 // use GCC builtin
653 output << "__builtin_offsetof(";
[e39241b]654 output << genType( offsetofExpr->get_type(), "", pretty, genC );
[e551c69]655 output << ", " << mangleName( offsetofExpr->get_member() );
[25a054f]656 output << ")";
657 }
[d63eeb0]658
[8688ce1]659 void CodeGenerator::visit( OffsetPackExpr * offsetPackExpr ) {
[e39241b]660 assertf( ! genC, "OffsetPackExpr should not reach code generation." );
661 output << "__CFA_offsetpack(" << genType( offsetPackExpr->get_type(), "", pretty, genC ) << ")";
[afc1045]662 }
[70a06f6]663
[8688ce1]664 void CodeGenerator::visit( LogicalExpr * logicalExpr ) {
[e04ef3a]665 extension( logicalExpr );
[6c4ff37]666 output << "(";
[51587aa]667 logicalExpr->get_arg1()->accept( *this );
668 if ( logicalExpr->get_isAnd() ) {
[6c4ff37]669 output << " && ";
[51587aa]670 } else {
[6c4ff37]671 output << " || ";
[51587aa]672 } // if
673 logicalExpr->get_arg2()->accept( *this );
[6c4ff37]674 output << ")";
[51587aa]675 }
[71f4e4f]676
[8688ce1]677 void CodeGenerator::visit( ConditionalExpr * conditionalExpr ) {
[e04ef3a]678 extension( conditionalExpr );
[6c4ff37]679 output << "(";
[51587aa]680 conditionalExpr->get_arg1()->accept( *this );
[6c4ff37]681 output << " ? ";
[51587aa]682 conditionalExpr->get_arg2()->accept( *this );
[6c4ff37]683 output << " : ";
[51587aa]684 conditionalExpr->get_arg3()->accept( *this );
[6c4ff37]685 output << ")";
[51587aa]686 }
[71f4e4f]687
[8688ce1]688 void CodeGenerator::visit( CommaExpr * commaExpr ) {
[e04ef3a]689 extension( commaExpr );
[6c4ff37]690 output << "(";
[51587aa]691 commaExpr->get_arg1()->accept( *this );
[6c4ff37]692 output << " , ";
[51587aa]693 commaExpr->get_arg2()->accept( *this );
[6c4ff37]694 output << ")";
[51587aa]695 }
[71f4e4f]696
[e39241b]697 void CodeGenerator::visit( UntypedTupleExpr * tupleExpr ) {
698 assertf( ! genC, "UntypedTupleExpr should not reach code generation." );
[f975c65]699 extension( tupleExpr );
[e39241b]700 output << "[";
701 genCommaList( tupleExpr->get_exprs().begin(), tupleExpr->get_exprs().end() );
702 output << "]";
703 }
[907eccb]704
[e39241b]705 void CodeGenerator::visit( TupleExpr * tupleExpr ) {
706 assertf( ! genC, "TupleExpr 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 }
[71f4e4f]712
[f975c65]713 void CodeGenerator::visit( TupleIndexExpr * tupleExpr ) {
714 assertf( ! genC, "TupleIndexExpr should not reach code generation." );
715 extension( tupleExpr );
716 tupleExpr->get_tuple()->accept( *this );
717 output << "." << tupleExpr->get_index();
718 }
719
[e39241b]720 void CodeGenerator::visit( TypeExpr * typeExpr ) {
[e4d829b]721 // if ( genC ) std::cerr << "typeexpr still exists: " << typeExpr << std::endl;
722 // assertf( ! genC, "TypeExpr should not reach code generation." );
723 if ( ! genC ) {
724 output<< genType( typeExpr->get_type(), "", pretty, genC );
725 }
[e39241b]726 }
[2b6c1e0]727
[8688ce1]728 void CodeGenerator::visit( AsmExpr * asmExpr ) {
[7f5566b]729 if ( asmExpr->get_inout() ) {
730 output << "[ ";
731 asmExpr->get_inout()->accept( *this );
732 output << " ] ";
733 } // if
734 asmExpr->get_constraint()->accept( *this );
735 output << " ( ";
736 asmExpr->get_operand()->accept( *this );
737 output << " )";
738 }
739
[3c13c03]740 void CodeGenerator::visit( CompoundLiteralExpr *compLitExpr ) {
[fbcde64]741 assert( compLitExpr->get_result() && dynamic_cast< ListInit * > ( compLitExpr->get_initializer() ) );
[e39241b]742 output << "(" << genType( compLitExpr->get_result(), "", pretty, genC ) << ")";
[3c13c03]743 compLitExpr->get_initializer()->accept( *this );
744 }
745
[6eb8948]746 void CodeGenerator::visit( StmtExpr * stmtExpr ) {
[3c13c03]747 std::list< Statement * > & stmts = stmtExpr->get_statements()->get_kids();
[4810867]748 output << lineDirective( stmtExpr) << "({" << std::endl;
[f7cb0bc]749 ++indent;
[3c13c03]750 unsigned int numStmts = stmts.size();
751 unsigned int i = 0;
752 for ( Statement * stmt : stmts ) {
[4810867]753 output << lineDirective( stmt ) << indent;
754 output << printLabels( stmt->get_labels() );
[3c13c03]755 if ( i+1 == numStmts ) {
756 // last statement in a statement expression needs to be handled specially -
757 // cannot cast to void, otherwise the expression statement has no value
758 if ( ExprStmt * exprStmt = dynamic_cast< ExprStmt * >( stmt ) ) {
759 exprStmt->get_expr()->accept( *this );
760 output << ";" << endl;
761 ++i;
762 break;
763 }
764 }
765 stmt->accept( *this );
766 output << endl;
767 if ( wantSpacing( stmt ) ) {
768 output << endl;
769 } // if
770 ++i;
771 }
[f7cb0bc]772 --indent;
[3c13c03]773 output << indent << "})";
[6eb8948]774 }
775
[4810867]776 // *** Statements
[8688ce1]777 void CodeGenerator::visit( CompoundStmt * compoundStmt ) {
[51587aa]778 std::list<Statement*> ks = compoundStmt->get_kids();
[2b6c1e0]779 output << "{" << endl;
[51587aa]780
[f7cb0bc]781 ++indent;
[51587aa]782
[7f5566b]783 for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) {
[cda48b6]784 output << indent << printLabels( (*i)->get_labels() );
[7f5566b]785 (*i)->accept( *this );
[2b6c1e0]786
[6c4ff37]787 output << endl;
[2b6c1e0]788 if ( wantSpacing( *i ) ) {
789 output << endl;
[3778cb2]790 } // if
[8688ce1]791 } // for
[f7cb0bc]792 --indent;
[51587aa]793
[cda48b6]794 output << indent << "}";
[51587aa]795 }
796
[8688ce1]797 void CodeGenerator::visit( ExprStmt * exprStmt ) {
[6c4ff37]798 assert( exprStmt );
[262f085f]799 Expression * expr = exprStmt->get_expr();
800 if ( genC ) {
801 // cast the top-level expression to void to reduce gcc warnings.
802 expr = new CastExpr( expr );
803 }
[321a2481]804 expr->accept( *this );
805 output << ";";
[51587aa]806 }
807
[8688ce1]808 void CodeGenerator::visit( AsmStmt * asmStmt ) {
[7f5566b]809 output << "asm ";
810 if ( asmStmt->get_voltile() ) output << "volatile ";
811 if ( ! asmStmt->get_gotolabels().empty() ) output << "goto ";
812 output << "( ";
813 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
814 output << " : ";
815 genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() );
816 output << " : ";
817 genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() );
818 output << " : ";
819 genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() );
820 if ( ! asmStmt->get_gotolabels().empty() ) {
821 output << " : ";
822 for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) {
823 output << *begin++;
824 if ( begin == asmStmt->get_gotolabels().end() ) break;
825 output << ", ";
826 } // for
827 } // if
828 output << " );" ;
829 }
830
[e994912]831 void CodeGenerator::visit( AsmDecl * asmDecl ) {
832 output << "asm ";
833 AsmStmt * asmStmt = asmDecl->get_stmt();
834 output << "( ";
835 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
836 output << " )" ;
837 }
838
[8688ce1]839 void CodeGenerator::visit( IfStmt * ifStmt ) {
[4810867]840 output << lineDirective( ifStmt );
[7f5566b]841 output << "if ( ";
842 ifStmt->get_condition()->accept( *this );
843 output << " ) ";
[51587aa]844
[7f5566b]845 ifStmt->get_thenPart()->accept( *this );
[51587aa]846
847 if ( ifStmt->get_elsePart() != 0) {
[2b6c1e0]848 output << " else ";
[7f5566b]849 ifStmt->get_elsePart()->accept( *this );
[51587aa]850 } // if
851 }
852
[8688ce1]853 void CodeGenerator::visit( SwitchStmt * switchStmt ) {
[4810867]854 output << lineDirective( switchStmt );
[7f5566b]855 output << "switch ( " ;
856 switchStmt->get_condition()->accept( *this );
857 output << " ) ";
[71f4e4f]858
[2b6c1e0]859 output << "{" << std::endl;
[f7cb0bc]860 ++indent;
[8688ce1]861 acceptAll( switchStmt->get_statements(), *this );
[f7cb0bc]862 --indent;
[cda48b6]863 output << indent << "}";
[51587aa]864 }
865
[8688ce1]866 void CodeGenerator::visit( CaseStmt * caseStmt ) {
[4810867]867 output << lineDirective( caseStmt );
[cda48b6]868 output << indent;
[eb3261f]869 if ( caseStmt->isDefault()) {
[2b6c1e0]870 output << "default";
[eb3261f]871 } else {
[2b6c1e0]872 output << "case ";
[7f5566b]873 caseStmt->get_condition()->accept( *this );
[17cd4eb]874 } // if
[6c4ff37]875 output << ":\n";
[71f4e4f]876
[51587aa]877 std::list<Statement *> sts = caseStmt->get_statements();
878
[f7cb0bc]879 ++indent;
[51587aa]880 for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) {
[cda48b6]881 output << indent << printLabels( (*i)->get_labels() ) ;
[7f5566b]882 (*i)->accept( *this );
[6c4ff37]883 output << endl;
[3778cb2]884 } // for
[f7cb0bc]885 --indent;
[51587aa]886 }
887
[8688ce1]888 void CodeGenerator::visit( BranchStmt * branchStmt ) {
[51587aa]889 switch ( branchStmt->get_type()) {
890 case BranchStmt::Goto:
891 if ( ! branchStmt->get_target().empty() )
[6c4ff37]892 output << "goto " << branchStmt->get_target();
[71f4e4f]893 else {
[51587aa]894 if ( branchStmt->get_computedTarget() != 0 ) {
[6c4ff37]895 output << "goto *";
[51587aa]896 branchStmt->get_computedTarget()->accept( *this );
897 } // if
898 } // if
899 break;
900 case BranchStmt::Break:
[6c4ff37]901 output << "break";
[51587aa]902 break;
903 case BranchStmt::Continue:
[6c4ff37]904 output << "continue";
[51587aa]905 break;
[3778cb2]906 } // switch
[2b6c1e0]907 output << ";";
[51587aa]908 }
909
[8688ce1]910 void CodeGenerator::visit( ReturnStmt * returnStmt ) {
[6c4ff37]911 output << "return ";
[4b2589a]912 maybeAccept( returnStmt->get_expr(), *this );
[6c4ff37]913 output << ";";
[51587aa]914 }
915
[daf1af8]916 void CodeGenerator::visit( ThrowStmt * throwStmt ) {
917 assertf( ! genC, "Throw statements should not reach code generation." );
918
919 output << ((throwStmt->get_kind() == ThrowStmt::Terminate) ?
920 "throw" : "throwResume");
921 if (throwStmt->get_expr()) {
922 output << " ";
923 throwStmt->get_expr()->accept( *this );
924 }
925 if (throwStmt->get_target()) {
926 output << " _At ";
927 throwStmt->get_target()->accept( *this );
928 }
929 output << ";";
930 }
931
[8688ce1]932 void CodeGenerator::visit( WhileStmt * whileStmt ) {
[321a2481]933 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]934 output << "do" ;
[321a2481]935 } else {
[6c4ff37]936 output << "while (" ;
[7f5566b]937 whileStmt->get_condition()->accept( *this );
[6c4ff37]938 output << ")";
[51587aa]939 } // if
[2b6c1e0]940 output << " ";
[51587aa]941
[2b6c1e0]942 output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() );
[51587aa]943 whileStmt->get_body()->accept( *this );
944
[cda48b6]945 output << indent;
[51587aa]946
947 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]948 output << " while (" ;
[7f5566b]949 whileStmt->get_condition()->accept( *this );
[6c4ff37]950 output << ");";
[51587aa]951 } // if
952 }
953
[8688ce1]954 void CodeGenerator::visit( ForStmt * forStmt ) {
[8e9cbb2]955 // initialization is always hoisted, so don't bother doing anything with that
[145f1fc]956 output << "for (;";
[51587aa]957
[321a2481]958 if ( forStmt->get_condition() != 0 ) {
[51587aa]959 forStmt->get_condition()->accept( *this );
[3778cb2]960 } // if
[6c4ff37]961 output << ";";
[51587aa]962
[321a2481]963 if ( forStmt->get_increment() != 0 ) {
964 // cast the top-level expression to void to reduce gcc warnings.
965 Expression * expr = new CastExpr( forStmt->get_increment() );
966 expr->accept( *this );
[3778cb2]967 } // if
[2b6c1e0]968 output << ") ";
[51587aa]969
970 if ( forStmt->get_body() != 0 ) {
[2b6c1e0]971 output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() );
[51587aa]972 forStmt->get_body()->accept( *this );
973 } // if
974 }
975
[7e003011]976 void CodeGenerator::visit( __attribute__((unused)) NullStmt * nullStmt ) {
[cda48b6]977 //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() );
[6c4ff37]978 output << "/* null statement */ ;";
[51587aa]979 }
980
[8688ce1]981 void CodeGenerator::visit( DeclStmt * declStmt ) {
[51587aa]982 declStmt->get_decl()->accept( *this );
[71f4e4f]983
[51587aa]984 if ( doSemicolon( declStmt->get_decl() ) ) {
[6c4ff37]985 output << ";";
[51587aa]986 } // if
987 }
988
[dd020c0]989 void CodeGenerator::handleStorageClass( DeclarationWithType * decl ) {
[fb04321]990 if ( decl->get_storageClasses().any() ) {
[6e8bd43]991 decl->get_storageClasses().print( output );
[a7c90d4]992 } // if
[dd020c0]993 } // CodeGenerator::handleStorageClass
[9facf3b]994
995 std::string genName( DeclarationWithType * decl ) {
996 CodeGen::OperatorInfo opInfo;
997 if ( operatorLookup( decl->get_name(), opInfo ) ) {
998 return opInfo.outputName;
999 } else {
1000 return decl->get_name();
1001 } // if
1002 }
[51b73452]1003} // namespace CodeGen
[51587aa]1004
1005// Local Variables: //
1006// tab-width: 4 //
1007// mode: c++ //
1008// compile-command: "make install" //
1009// End: //
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