source: src/CodeGen/CodeGenerator.cc@ 9bd6105

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 9bd6105 was 87e08e24, checked in by Rob Schluntz <rschlunt@…>, 8 years ago

Add missing indent prints in codegen
  • Property mode set to 100644
File size: 31.0 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
[0dd18fd]12// Last Modified On : Fri Aug 18 15:34:00 2017
13// Update Count : 488
[51587aa]14//
[3268a58]15#include "CodeGenerator.h"
[51587aa]16
[bf2438c]17#include <cassert> // for assert, assertf
18#include <list> // for _List_iterator, list, list<>::it...
[51b73452]19
[bf2438c]20#include "Common/SemanticError.h" // for SemanticError
21#include "Common/UniqueName.h" // for UniqueName
22#include "Common/utility.h" // for CodeLocation, toString
23#include "GenType.h" // for genType
24#include "InitTweak/InitTweak.h" // for getPointerBase
25#include "OperatorTable.h" // for OperatorInfo, operatorLookup
26#include "Parser/LinkageSpec.h" // for Spec, Intrinsic
27#include "SynTree/Attribute.h" // for Attribute
28#include "SynTree/BaseSyntaxNode.h" // for BaseSyntaxNode
29#include "SynTree/Constant.h" // for Constant
30#include "SynTree/Declaration.h" // for DeclarationWithType, TypeDecl
31#include "SynTree/Expression.h" // for Expression, UntypedExpr, Applica...
32#include "SynTree/Initializer.h" // for Initializer, ListInit, Designation
33#include "SynTree/Label.h" // for Label, operator<<
34#include "SynTree/Statement.h" // for Statement, AsmStmt, BranchStmt
35#include "SynTree/Type.h" // for Type, Type::StorageClasses, Func...
[10a7775]36
[51b73452]37using namespace std;
38
39namespace CodeGen {
[6c4ff37]40 int CodeGenerator::tabsize = 4;
[51587aa]41
[145f1fc]42 // the kinds of statements that would ideally be followed by whitespace
[2b6c1e0]43 bool wantSpacing( Statement * stmt) {
44 return dynamic_cast< IfStmt * >( stmt ) || dynamic_cast< CompoundStmt * >( stmt ) ||
[08061589]45 dynamic_cast< WhileStmt * >( stmt ) || dynamic_cast< ForStmt * >( stmt ) || dynamic_cast< SwitchStmt *>( stmt );
[2b6c1e0]46 }
47
[8688ce1]48 void CodeGenerator::extension( Expression * expr ) {
[8e9cbb2]49 if ( expr->get_extension() ) {
50 output << "__extension__ ";
51 } // if
52 } // extension
53
[8688ce1]54 void CodeGenerator::extension( Declaration * decl ) {
[8e9cbb2]55 if ( decl->get_extension() ) {
56 output << "__extension__ ";
57 } // if
58 } // extension
59
[58dd019]60 void CodeGenerator::asmName( DeclarationWithType * decl ) {
61 if ( ConstantExpr * asmName = decl->get_asmName() ) {
62 output << " asm ( " << asmName->get_constant()->get_value() << " )";
63 } // if
64 } // extension
65
[888cbe4]66 CodeGenerator::LabelPrinter & CodeGenerator::LabelPrinter::operator()( std::list< Label > & l ) {
67 labels = &l;
68 return *this;
69 }
70
[8688ce1]71 ostream & operator<<( ostream & output, CodeGenerator::LabelPrinter & printLabels ) {
[888cbe4]72 std::list< Label > & labs = *printLabels.labels;
73 // l.unique(); // assumes a sorted list. Why not use set? Does order matter?
74 for ( Label & l : labs ) {
75 output << l.get_name() + ": ";
76 printLabels.cg.genAttributes( l.get_attributes() );
[8688ce1]77 } // for
[888cbe4]78 return output;
79 }
80
[8bafacc]81 /* Using updateLocation at the beginning of a node and nextLine
82 * within a node should become the method of formating.
83 */
84 void CodeGenerator::updateLocation( CodeLocation const & to ) {
85 if ( !lineMarks ) {
86 return;
87 } else if ( currentLocation.followedBy( to, 0 ) ) {
88 return;
89 } else if ( currentLocation.followedBy( to, 1 ) ) {
90 output << "\n" << indent;
91 currentLocation.linenumber += 1;
92 } else if ( currentLocation.followedBy( to, 2 ) ) {
93 output << "\n\n" << indent;
94 currentLocation.linenumber += 2;
95 } else {
96 output << "\n# " << to.linenumber << " \"" << to.filename
97 << "\"\n" << indent;
98 currentLocation = to;
99 }
100 output << std::flush;
101 }
[c850687]102
[8bafacc]103 void CodeGenerator::updateLocation( BaseSyntaxNode const * to ) {
104 updateLocation( to->location );
[c850687]105 }
106
[8bafacc]107 void CodeGenerator::nextLine() {
108 if ( !lineMarks ) {
109 output << "\n" << indent << std::flush;
[c850687]110 }
111 }
112
[f7cb0bc]113 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]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;
[e6cee92]194 output << indent;
[e39241b]195 }
196
[29cf9c8]197 output << kind;
[51587aa]198 if ( aggDecl->get_name() != "" )
[6c4ff37]199 output << aggDecl->get_name();
[71f4e4f]200
[2c57025]201 if ( aggDecl->has_body() ) {
202 std::list< Declaration * > & memb = aggDecl->get_members();
[94b4364]203 output << " {" << endl;
[51587aa]204
[f7cb0bc]205 ++indent;
[3778cb2]206 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++ ) {
[8bafacc]207 updateLocation( *i );
[87e08e24]208 output << indent;
[7f5566b]209 (*i)->accept( *this );
[6c4ff37]210 output << ";" << endl;
[3778cb2]211 } // for
[51587aa]212
[f7cb0bc]213 --indent;
[51587aa]214
[cda48b6]215 output << indent << "}";
[17cd4eb]216 } // if
[51587aa]217 }
[17cd4eb]218
[8688ce1]219 void CodeGenerator::visit( StructDecl * structDecl ) {
[8e9cbb2]220 extension( structDecl );
[5f642e38]221 handleAggregate( structDecl, "struct " );
[51587aa]222 }
[17cd4eb]223
[8688ce1]224 void CodeGenerator::visit( UnionDecl * unionDecl ) {
[8e9cbb2]225 extension( unionDecl );
[5f642e38]226 handleAggregate( unionDecl, "union " );
[51587aa]227 }
[71f4e4f]228
[8688ce1]229 void CodeGenerator::visit( EnumDecl * enumDecl ) {
[8e9cbb2]230 extension( enumDecl );
[8bafacc]231 updateLocation( enumDecl );
[6c4ff37]232 output << "enum ";
[c0aa336]233 genAttributes( enumDecl->get_attributes() );
[51587aa]234
[8e9cbb2]235 if ( enumDecl->get_name() != "" )
236 output << enumDecl->get_name();
[71f4e4f]237
[8e9cbb2]238 std::list< Declaration* > &memb = enumDecl->get_members();
[51587aa]239
240 if ( ! memb.empty() ) {
[cda48b6]241 output << " {" << endl;
[51587aa]242
[f7cb0bc]243 ++indent;
[51587aa]244 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) {
[8688ce1]245 ObjectDecl * obj = dynamic_cast< ObjectDecl* >( *i );
[51587aa]246 assert( obj );
[8bafacc]247 updateLocation( obj );
[87e08e24]248 output << indent << mangleName( obj );
[51587aa]249 if ( obj->get_init() ) {
[6c4ff37]250 output << " = ";
[7f5566b]251 obj->get_init()->accept( *this );
[51587aa]252 } // if
[6c4ff37]253 output << "," << endl;
[51587aa]254 } // for
255
[f7cb0bc]256 --indent;
[51587aa]257
[cda48b6]258 output << indent << "}";
[51587aa]259 } // if
260 }
[71f4e4f]261
[7e003011]262 void CodeGenerator::visit( __attribute__((unused)) TraitDecl * traitDecl ) {}
[71f4e4f]263
[8688ce1]264 void CodeGenerator::visit( TypedefDecl * typeDecl ) {
[e39241b]265 assertf( ! genC, "Typedefs are removed and substituted in earlier passes." );
[8bafacc]266 updateLocation( typeDecl );
[e39241b]267 output << "typedef ";
268 output << genType( typeDecl->get_base(), typeDecl->get_name(), pretty, genC ) << endl;
[51587aa]269 }
[71f4e4f]270
[8688ce1]271 void CodeGenerator::visit( TypeDecl * typeDecl ) {
[e39241b]272 if ( genC ) {
273 // really, we should mutate this into something that isn't a TypeDecl but that requires large-scale changes,
274 // still to be done
275 extension( typeDecl );
276 output << "extern unsigned long " << typeDecl->get_name();
277 if ( typeDecl->get_base() ) {
278 output << " = sizeof( " << genType( typeDecl->get_base(), "", pretty, genC ) << " )";
279 } // if
280 } else {
[bdd0755]281 output << typeDecl->genTypeString() << " " << typeDecl->get_name();
282 if ( typeDecl->get_kind() != TypeDecl::Any && typeDecl->get_sized() ) {
283 output << " | sized(" << typeDecl->get_name() << ")";
284 }
[e39241b]285 if ( ! typeDecl->get_assertions().empty() ) {
286 output << " | { ";
287 genCommaList( typeDecl->get_assertions().begin(), typeDecl->get_assertions().end() );
288 output << " }";
289 }
290 }
[51587aa]291 }
292
[e4d829b]293 void CodeGenerator::visit( Designation * designation ) {
294 std::list< Expression * > designators = designation->get_designators();
[e45215c]295 if ( designators.size() == 0 ) return;
[e4d829b]296 for ( Expression * des : designators ) {
[62423350]297 if ( dynamic_cast< NameExpr * >( des ) || dynamic_cast< VariableExpr * >( des ) ) {
298 // if expression is a NameExpr or VariableExpr, then initializing aggregate member
299 output << ".";
[e4d829b]300 des->accept( *this );
301 } else {
[62423350]302 // otherwise, it has to be a ConstantExpr or CastExpr, initializing array eleemnt
303 output << "[";
[e4d829b]304 des->accept( *this );
[62423350]305 output << "]";
[3778cb2]306 } // if
307 } // for
[e45215c]308 output << " = ";
309 }
310
[8688ce1]311 void CodeGenerator::visit( SingleInit * init ) {
[51587aa]312 init->get_value()->accept( *this );
313 }
314
[8688ce1]315 void CodeGenerator::visit( ListInit * init ) {
[e4d829b]316 auto initBegin = init->begin();
317 auto initEnd = init->end();
318 auto desigBegin = init->get_designations().begin();
319 auto desigEnd = init->get_designations().end();
320
[6c4ff37]321 output << "{ ";
[e4d829b]322 for ( ; initBegin != initEnd && desigBegin != desigEnd; ) {
323 (*desigBegin)->accept( *this );
324 (*initBegin)->accept( *this );
325 ++initBegin, ++desigBegin;
326 if ( initBegin != initEnd ) {
327 output << ", ";
328 }
329 }
[6c4ff37]330 output << " }";
[e4d829b]331 assertf( initBegin == initEnd && desigBegin == desigEnd, "Initializers and designators not the same length. %s", toString( init ).c_str() );
[51587aa]332 }
333
[7e003011]334 void CodeGenerator::visit( __attribute__((unused)) ConstructorInit * init ){
[e39241b]335 assertf( ! genC, "ConstructorInit nodes should not reach code generation." );
[e6cee92]336 // pseudo-output for constructor/destructor pairs
337 output << "<ctorinit>{" << std::endl << ++indent << "ctor: ";
338 maybeAccept( init->get_ctor(), *this );
339 output << ", " << std::endl << indent << "dtor: ";
340 maybeAccept( init->get_dtor(), *this );
341 output << std::endl << --indent << "}";
[fc638d2]342 }
343
[8688ce1]344 void CodeGenerator::visit( Constant * constant ) {
[6c4ff37]345 output << constant->get_value() ;
[51587aa]346 }
347
[4810867]348 // *** Expressions
[8688ce1]349 void CodeGenerator::visit( ApplicationExpr * applicationExpr ) {
[e04ef3a]350 extension( applicationExpr );
[8688ce1]351 if ( VariableExpr * varExpr = dynamic_cast< VariableExpr* >( applicationExpr->get_function() ) ) {
[51587aa]352 OperatorInfo opInfo;
353 if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( varExpr->get_var()->get_name(), opInfo ) ) {
354 std::list< Expression* >::iterator arg = applicationExpr->get_args().begin();
355 switch ( opInfo.type ) {
356 case OT_INDEX:
357 assert( applicationExpr->get_args().size() == 2 );
358 (*arg++)->accept( *this );
[6c4ff37]359 output << "[";
[51587aa]360 (*arg)->accept( *this );
[6c4ff37]361 output << "]";
[51587aa]362 break;
[71f4e4f]363
[51587aa]364 case OT_CALL:
[356189a]365 // there are no intrinsic definitions of the function call operator
[51587aa]366 assert( false );
367 break;
[71f4e4f]368
[f1e012b]369 case OT_CTOR:
[c2ce2350]370 case OT_DTOR:
[356189a]371 if ( applicationExpr->get_args().size() == 1 ) {
[8e9cbb2]372 // the expression fed into a single parameter constructor or destructor may contain side
373 // effects, so must still output this expression
[64071c2]374 output << "(";
[356189a]375 (*arg++)->accept( *this );
[64071c2]376 output << ") /* " << opInfo.inputName << " */";
[356189a]377 } else if ( applicationExpr->get_args().size() == 2 ) {
[c2ce2350]378 // intrinsic two parameter constructors are essentially bitwise assignment
[356189a]379 output << "(";
380 (*arg++)->accept( *this );
381 output << opInfo.symbol;
382 (*arg)->accept( *this );
[c2ce2350]383 output << ") /* " << opInfo.inputName << " */";
[356189a]384 } else {
[c2ce2350]385 // no constructors with 0 or more than 2 parameters
[356189a]386 assert( false );
[8688ce1]387 } // if
[356189a]388 break;
[f1e012b]389
[51587aa]390 case OT_PREFIX:
391 case OT_PREFIXASSIGN:
392 assert( applicationExpr->get_args().size() == 1 );
[6c4ff37]393 output << "(";
394 output << opInfo.symbol;
[51587aa]395 (*arg)->accept( *this );
[6c4ff37]396 output << ")";
[51587aa]397 break;
[71f4e4f]398
[51587aa]399 case OT_POSTFIX:
400 case OT_POSTFIXASSIGN:
401 assert( applicationExpr->get_args().size() == 1 );
402 (*arg)->accept( *this );
[6c4ff37]403 output << opInfo.symbol;
[51587aa]404 break;
405
[f1e012b]406
[51587aa]407 case OT_INFIX:
408 case OT_INFIXASSIGN:
409 assert( applicationExpr->get_args().size() == 2 );
[6c4ff37]410 output << "(";
[51587aa]411 (*arg++)->accept( *this );
[6c4ff37]412 output << opInfo.symbol;
[51587aa]413 (*arg)->accept( *this );
[6c4ff37]414 output << ")";
[51587aa]415 break;
[71f4e4f]416
[51587aa]417 case OT_CONSTANT:
[721f17a]418 case OT_LABELADDRESS:
419 // there are no intrinsic definitions of 0/1 or label addresses as functions
[51587aa]420 assert( false );
[3778cb2]421 } // switch
[17cd4eb]422 } else {
[51587aa]423 varExpr->accept( *this );
[6c4ff37]424 output << "(";
[51587aa]425 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]426 output << ")";
[17cd4eb]427 } // if
[51587aa]428 } else {
429 applicationExpr->get_function()->accept( *this );
[6c4ff37]430 output << "(";
[51587aa]431 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]432 output << ")";
[51587aa]433 } // if
434 }
[71f4e4f]435
[8688ce1]436 void CodeGenerator::visit( UntypedExpr * untypedExpr ) {
[e04ef3a]437 extension( untypedExpr );
[8688ce1]438 if ( NameExpr * nameExpr = dynamic_cast< NameExpr* >( untypedExpr->get_function() ) ) {
[51587aa]439 OperatorInfo opInfo;
440 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
441 std::list< Expression* >::iterator arg = untypedExpr->get_args().begin();
442 switch ( opInfo.type ) {
443 case OT_INDEX:
444 assert( untypedExpr->get_args().size() == 2 );
445 (*arg++)->accept( *this );
[6c4ff37]446 output << "[";
[51587aa]447 (*arg)->accept( *this );
[6c4ff37]448 output << "]";
[51587aa]449 break;
[71f4e4f]450
[51587aa]451 case OT_CALL:
[f1e012b]452 assert( false );
453
[c2ce2350]454 case OT_CTOR:
455 case OT_DTOR:
456 if ( untypedExpr->get_args().size() == 1 ) {
[8e9cbb2]457 // the expression fed into a single parameter constructor or destructor may contain side
458 // effects, so must still output this expression
[64071c2]459 output << "(";
[c2ce2350]460 (*arg++)->accept( *this );
[64071c2]461 output << ") /* " << opInfo.inputName << " */";
[c2ce2350]462 } else if ( untypedExpr->get_args().size() == 2 ) {
463 // intrinsic two parameter constructors are essentially bitwise assignment
464 output << "(";
465 (*arg++)->accept( *this );
466 output << opInfo.symbol;
467 (*arg)->accept( *this );
468 output << ") /* " << opInfo.inputName << " */";
469 } else {
470 // no constructors with 0 or more than 2 parameters
471 assert( false );
[3778cb2]472 } // if
[51587aa]473 break;
[71f4e4f]474
[51587aa]475 case OT_PREFIX:
476 case OT_PREFIXASSIGN:
[de62360d]477 case OT_LABELADDRESS:
[51587aa]478 assert( untypedExpr->get_args().size() == 1 );
[6c4ff37]479 output << "(";
480 output << opInfo.symbol;
[51587aa]481 (*arg)->accept( *this );
[6c4ff37]482 output << ")";
[51587aa]483 break;
[71f4e4f]484
[51587aa]485 case OT_POSTFIX:
486 case OT_POSTFIXASSIGN:
487 assert( untypedExpr->get_args().size() == 1 );
488 (*arg)->accept( *this );
[6c4ff37]489 output << opInfo.symbol;
[51587aa]490 break;
[71f4e4f]491
[51587aa]492 case OT_INFIX:
493 case OT_INFIXASSIGN:
494 assert( untypedExpr->get_args().size() == 2 );
[6c4ff37]495 output << "(";
[51587aa]496 (*arg++)->accept( *this );
[6c4ff37]497 output << opInfo.symbol;
[51587aa]498 (*arg)->accept( *this );
[6c4ff37]499 output << ")";
[51587aa]500 break;
[71f4e4f]501
[51587aa]502 case OT_CONSTANT:
503 // there are no intrinsic definitions of 0 or 1 as functions
504 assert( false );
[3778cb2]505 } // switch
[51587aa]506 } else {
[8688ce1]507 if ( nameExpr->get_name() == "..." ) { // case V1 ... V2 or case V1~V2
[ac911f4]508 assert( untypedExpr->get_args().size() == 2 );
509 (*untypedExpr->get_args().begin())->accept( *this );
510 output << " ... ";
511 (*--untypedExpr->get_args().end())->accept( *this );
[057b34f]512 } else { // builtin routines
513 nameExpr->accept( *this );
514 output << "(";
515 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
516 output << ")";
[66d12f7]517 } // if
[51587aa]518 } // if
519 } else {
520 untypedExpr->get_function()->accept( *this );
[6c4ff37]521 output << "(";
[51587aa]522 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
[6c4ff37]523 output << ")";
[51587aa]524 } // if
525 }
[71f4e4f]526
[064e3ff]527 void CodeGenerator::visit( RangeExpr * rangeExpr ) {
528 rangeExpr->get_low()->accept( *this );
529 output << " ... ";
530 rangeExpr->get_high()->accept( *this );
531 }
532
[8688ce1]533 void CodeGenerator::visit( NameExpr * nameExpr ) {
[e04ef3a]534 extension( nameExpr );
[51587aa]535 OperatorInfo opInfo;
536 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
537 assert( opInfo.type == OT_CONSTANT );
[6c4ff37]538 output << opInfo.symbol;
[51587aa]539 } else {
[6c4ff37]540 output << nameExpr->get_name();
[51587aa]541 } // if
542 }
[71f4e4f]543
[8688ce1]544 void CodeGenerator::visit( AddressExpr * addressExpr ) {
[e04ef3a]545 extension( addressExpr );
[6c4ff37]546 output << "(&";
[51587aa]547 // this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address
[8688ce1]548 if ( VariableExpr * variableExpr = dynamic_cast< VariableExpr* >( addressExpr->get_arg() ) ) {
[6c4ff37]549 output << mangleName( variableExpr->get_var() );
[51587aa]550 } else {
551 addressExpr->get_arg()->accept( *this );
552 } // if
[6c4ff37]553 output << ")";
[51587aa]554 }
555
[8688ce1]556 void CodeGenerator::visit( CastExpr * castExpr ) {
[e04ef3a]557 extension( castExpr );
[803deb1]558 output << "(";
[906e24d]559 if ( castExpr->get_result()->isVoid() ) {
[803deb1]560 output << "(void)" ;
[d104b02]561 } else {
562 // at least one result type of cast.
563 // Note: previously, lvalue casts were skipped. Since it's now impossible for the user to write
564 // an lvalue cast, this has been taken out.
[803deb1]565 output << "(";
[e39241b]566 output << genType( castExpr->get_result(), "", pretty, genC );
[71f4e4f]567 output << ")";
[3778cb2]568 } // if
[803deb1]569 castExpr->get_arg()->accept( *this );
570 output << ")";
[51587aa]571 }
[71f4e4f]572
[a5f0529]573 void CodeGenerator::visit( VirtualCastExpr * castExpr ) {
574 assertf( ! genC, "VirtualCastExpr should not reach code generation." );
575 extension( castExpr );
576 output << "(virtual ";
577 castExpr->get_arg()->accept( *this );
578 output << ")";
579 }
580
[8688ce1]581 void CodeGenerator::visit( UntypedMemberExpr * memberExpr ) {
[e39241b]582 assertf( ! genC, "UntypedMemberExpr should not reach code generation." );
583 extension( memberExpr );
584 memberExpr->get_aggregate()->accept( *this );
[5f642e38]585 output << ".";
586 memberExpr->get_member()->accept( *this );
[51587aa]587 }
[71f4e4f]588
[8688ce1]589 void CodeGenerator::visit( MemberExpr * memberExpr ) {
[e04ef3a]590 extension( memberExpr );
[51587aa]591 memberExpr->get_aggregate()->accept( *this );
[6c4ff37]592 output << "." << mangleName( memberExpr->get_member() );
[51587aa]593 }
[71f4e4f]594
[8688ce1]595 void CodeGenerator::visit( VariableExpr * variableExpr ) {
[e04ef3a]596 extension( variableExpr );
[51587aa]597 OperatorInfo opInfo;
598 if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) {
[6c4ff37]599 output << opInfo.symbol;
[51587aa]600 } else {
[6c4ff37]601 output << mangleName( variableExpr->get_var() );
[51587aa]602 } // if
603 }
[71f4e4f]604
[8688ce1]605 void CodeGenerator::visit( ConstantExpr * constantExpr ) {
[51587aa]606 assert( constantExpr->get_constant() );
[e04ef3a]607 extension( constantExpr );
[51587aa]608 constantExpr->get_constant()->accept( *this );
609 }
[71f4e4f]610
[8688ce1]611 void CodeGenerator::visit( SizeofExpr * sizeofExpr ) {
[e04ef3a]612 extension( sizeofExpr );
[6c4ff37]613 output << "sizeof(";
[51587aa]614 if ( sizeofExpr->get_isType() ) {
[e39241b]615 output << genType( sizeofExpr->get_type(), "", pretty, genC );
[51587aa]616 } else {
617 sizeofExpr->get_expr()->accept( *this );
618 } // if
[6c4ff37]619 output << ")";
[51587aa]620 }
[47534159]621
[8688ce1]622 void CodeGenerator::visit( AlignofExpr * alignofExpr ) {
[47534159]623 // use GCC extension to avoid bumping std to C11
[8e9cbb2]624 extension( alignofExpr );
[47534159]625 output << "__alignof__(";
[25a054f]626 if ( alignofExpr->get_isType() ) {
[e39241b]627 output << genType( alignofExpr->get_type(), "", pretty, genC );
[47534159]628 } else {
[25a054f]629 alignofExpr->get_expr()->accept( *this );
[47534159]630 } // if
631 output << ")";
632 }
[71f4e4f]633
[8688ce1]634 void CodeGenerator::visit( UntypedOffsetofExpr * offsetofExpr ) {
[e39241b]635 assertf( ! genC, "UntypedOffsetofExpr should not reach code generation." );
636 output << "offsetof(";
637 output << genType( offsetofExpr->get_type(), "", pretty, genC );
638 output << ", " << offsetofExpr->get_member();
639 output << ")";
[2a4b088]640 }
641
[8688ce1]642 void CodeGenerator::visit( OffsetofExpr * offsetofExpr ) {
[25a054f]643 // use GCC builtin
644 output << "__builtin_offsetof(";
[e39241b]645 output << genType( offsetofExpr->get_type(), "", pretty, genC );
[e551c69]646 output << ", " << mangleName( offsetofExpr->get_member() );
[25a054f]647 output << ")";
648 }
[d63eeb0]649
[8688ce1]650 void CodeGenerator::visit( OffsetPackExpr * offsetPackExpr ) {
[e39241b]651 assertf( ! genC, "OffsetPackExpr should not reach code generation." );
652 output << "__CFA_offsetpack(" << genType( offsetPackExpr->get_type(), "", pretty, genC ) << ")";
[afc1045]653 }
[70a06f6]654
[8688ce1]655 void CodeGenerator::visit( LogicalExpr * logicalExpr ) {
[e04ef3a]656 extension( logicalExpr );
[6c4ff37]657 output << "(";
[51587aa]658 logicalExpr->get_arg1()->accept( *this );
659 if ( logicalExpr->get_isAnd() ) {
[6c4ff37]660 output << " && ";
[51587aa]661 } else {
[6c4ff37]662 output << " || ";
[51587aa]663 } // if
664 logicalExpr->get_arg2()->accept( *this );
[6c4ff37]665 output << ")";
[51587aa]666 }
[71f4e4f]667
[8688ce1]668 void CodeGenerator::visit( ConditionalExpr * conditionalExpr ) {
[e04ef3a]669 extension( conditionalExpr );
[6c4ff37]670 output << "(";
[51587aa]671 conditionalExpr->get_arg1()->accept( *this );
[6c4ff37]672 output << " ? ";
[51587aa]673 conditionalExpr->get_arg2()->accept( *this );
[6c4ff37]674 output << " : ";
[51587aa]675 conditionalExpr->get_arg3()->accept( *this );
[6c4ff37]676 output << ")";
[51587aa]677 }
[71f4e4f]678
[8688ce1]679 void CodeGenerator::visit( CommaExpr * commaExpr ) {
[e04ef3a]680 extension( commaExpr );
[6c4ff37]681 output << "(";
[8a6cf7e]682 if ( genC ) {
683 // arg1 of a CommaExpr is never used, so it can be safely cast to void to reduce gcc warnings.
684 commaExpr->set_arg1( new CastExpr( commaExpr->get_arg1() ) );
685 }
[51587aa]686 commaExpr->get_arg1()->accept( *this );
[6c4ff37]687 output << " , ";
[51587aa]688 commaExpr->get_arg2()->accept( *this );
[6c4ff37]689 output << ")";
[51587aa]690 }
[71f4e4f]691
[d104b02]692 void CodeGenerator::visit( TupleAssignExpr * tupleExpr ) {
693 assertf( ! genC, "TupleAssignExpr should not reach code generation." );
694 tupleExpr->stmtExpr->accept( *this );
695 }
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
[d104b02]746 void CodeGenerator::visit( UniqueExpr * unqExpr ) {
747 assertf( ! genC, "Unique expressions should not reach code generation." );
748 output << "unq<" << unqExpr->get_id() << ">{ ";
749 unqExpr->get_expr()->accept( *this );
750 output << " }";
751 }
752
[6eb8948]753 void CodeGenerator::visit( StmtExpr * stmtExpr ) {
[3c13c03]754 std::list< Statement * > & stmts = stmtExpr->get_statements()->get_kids();
[8bafacc]755 updateLocation( stmtExpr );
756 output << "({" << std::endl;
[f7cb0bc]757 ++indent;
[3c13c03]758 unsigned int numStmts = stmts.size();
759 unsigned int i = 0;
760 for ( Statement * stmt : stmts ) {
[8bafacc]761 updateLocation( stmt );
[8a6cf7e]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 }
[f7cb0bc]780 --indent;
[3c13c03]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
[f7cb0bc]789 ++indent;
[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
[f7cb0bc]800 --indent;
[51587aa]801
[cda48b6]802 output << indent << "}";
[51587aa]803 }
804
[8688ce1]805 void CodeGenerator::visit( ExprStmt * exprStmt ) {
[6c4ff37]806 assert( exprStmt );
[262f085f]807 if ( genC ) {
808 // cast the top-level expression to void to reduce gcc warnings.
[8a6cf7e]809 exprStmt->set_expr( new CastExpr( exprStmt->get_expr() ) );
[262f085f]810 }
[8a6cf7e]811 exprStmt->get_expr()->accept( *this );
[321a2481]812 output << ";";
[51587aa]813 }
814
[8688ce1]815 void CodeGenerator::visit( AsmStmt * asmStmt ) {
[7f5566b]816 output << "asm ";
817 if ( asmStmt->get_voltile() ) output << "volatile ";
818 if ( ! asmStmt->get_gotolabels().empty() ) output << "goto ";
819 output << "( ";
820 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
821 output << " : ";
822 genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() );
823 output << " : ";
824 genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() );
825 output << " : ";
826 genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() );
827 if ( ! asmStmt->get_gotolabels().empty() ) {
828 output << " : ";
829 for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) {
830 output << *begin++;
831 if ( begin == asmStmt->get_gotolabels().end() ) break;
832 output << ", ";
833 } // for
834 } // if
835 output << " );" ;
836 }
837
[e994912]838 void CodeGenerator::visit( AsmDecl * asmDecl ) {
839 output << "asm ";
840 AsmStmt * asmStmt = asmDecl->get_stmt();
841 output << "( ";
842 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
843 output << " )" ;
844 }
845
[8688ce1]846 void CodeGenerator::visit( IfStmt * ifStmt ) {
[8bafacc]847 updateLocation( ifStmt );
[7f5566b]848 output << "if ( ";
849 ifStmt->get_condition()->accept( *this );
850 output << " ) ";
[51587aa]851
[7f5566b]852 ifStmt->get_thenPart()->accept( *this );
[51587aa]853
854 if ( ifStmt->get_elsePart() != 0) {
[2b6c1e0]855 output << " else ";
[7f5566b]856 ifStmt->get_elsePart()->accept( *this );
[51587aa]857 } // if
858 }
859
[8688ce1]860 void CodeGenerator::visit( SwitchStmt * switchStmt ) {
[8bafacc]861 updateLocation( switchStmt );
[7f5566b]862 output << "switch ( " ;
863 switchStmt->get_condition()->accept( *this );
864 output << " ) ";
[71f4e4f]865
[2b6c1e0]866 output << "{" << std::endl;
[f7cb0bc]867 ++indent;
[8688ce1]868 acceptAll( switchStmt->get_statements(), *this );
[f7cb0bc]869 --indent;
[cda48b6]870 output << indent << "}";
[51587aa]871 }
872
[8688ce1]873 void CodeGenerator::visit( CaseStmt * caseStmt ) {
[8bafacc]874 updateLocation( caseStmt );
[eb3261f]875 if ( caseStmt->isDefault()) {
[2b6c1e0]876 output << "default";
[eb3261f]877 } else {
[2b6c1e0]878 output << "case ";
[7f5566b]879 caseStmt->get_condition()->accept( *this );
[17cd4eb]880 } // if
[6c4ff37]881 output << ":\n";
[71f4e4f]882
[51587aa]883 std::list<Statement *> sts = caseStmt->get_statements();
884
[f7cb0bc]885 ++indent;
[51587aa]886 for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) {
[cda48b6]887 output << indent << printLabels( (*i)->get_labels() ) ;
[7f5566b]888 (*i)->accept( *this );
[6c4ff37]889 output << endl;
[3778cb2]890 } // for
[f7cb0bc]891 --indent;
[51587aa]892 }
893
[8688ce1]894 void CodeGenerator::visit( BranchStmt * branchStmt ) {
[51587aa]895 switch ( branchStmt->get_type()) {
896 case BranchStmt::Goto:
897 if ( ! branchStmt->get_target().empty() )
[6c4ff37]898 output << "goto " << branchStmt->get_target();
[71f4e4f]899 else {
[51587aa]900 if ( branchStmt->get_computedTarget() != 0 ) {
[6c4ff37]901 output << "goto *";
[51587aa]902 branchStmt->get_computedTarget()->accept( *this );
903 } // if
904 } // if
905 break;
906 case BranchStmt::Break:
[6c4ff37]907 output << "break";
[51587aa]908 break;
909 case BranchStmt::Continue:
[6c4ff37]910 output << "continue";
[51587aa]911 break;
[3778cb2]912 } // switch
[2b6c1e0]913 output << ";";
[51587aa]914 }
915
[8688ce1]916 void CodeGenerator::visit( ReturnStmt * returnStmt ) {
[6c4ff37]917 output << "return ";
[4b2589a]918 maybeAccept( returnStmt->get_expr(), *this );
[6c4ff37]919 output << ";";
[51587aa]920 }
921
[daf1af8]922 void CodeGenerator::visit( ThrowStmt * throwStmt ) {
923 assertf( ! genC, "Throw statements should not reach code generation." );
924
925 output << ((throwStmt->get_kind() == ThrowStmt::Terminate) ?
926 "throw" : "throwResume");
927 if (throwStmt->get_expr()) {
928 output << " ";
929 throwStmt->get_expr()->accept( *this );
930 }
931 if (throwStmt->get_target()) {
932 output << " _At ";
933 throwStmt->get_target()->accept( *this );
934 }
935 output << ";";
936 }
937
[8688ce1]938 void CodeGenerator::visit( WhileStmt * whileStmt ) {
[321a2481]939 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]940 output << "do" ;
[321a2481]941 } else {
[6c4ff37]942 output << "while (" ;
[7f5566b]943 whileStmt->get_condition()->accept( *this );
[6c4ff37]944 output << ")";
[51587aa]945 } // if
[2b6c1e0]946 output << " ";
[51587aa]947
[2b6c1e0]948 output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() );
[51587aa]949 whileStmt->get_body()->accept( *this );
950
[cda48b6]951 output << indent;
[51587aa]952
953 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]954 output << " while (" ;
[7f5566b]955 whileStmt->get_condition()->accept( *this );
[6c4ff37]956 output << ");";
[51587aa]957 } // if
958 }
959
[8688ce1]960 void CodeGenerator::visit( ForStmt * forStmt ) {
[8e9cbb2]961 // initialization is always hoisted, so don't bother doing anything with that
[145f1fc]962 output << "for (;";
[51587aa]963
[321a2481]964 if ( forStmt->get_condition() != 0 ) {
[51587aa]965 forStmt->get_condition()->accept( *this );
[3778cb2]966 } // if
[6c4ff37]967 output << ";";
[51587aa]968
[321a2481]969 if ( forStmt->get_increment() != 0 ) {
970 // cast the top-level expression to void to reduce gcc warnings.
971 Expression * expr = new CastExpr( forStmt->get_increment() );
972 expr->accept( *this );
[3778cb2]973 } // if
[2b6c1e0]974 output << ") ";
[51587aa]975
976 if ( forStmt->get_body() != 0 ) {
[2b6c1e0]977 output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() );
[51587aa]978 forStmt->get_body()->accept( *this );
979 } // if
980 }
981
[7e003011]982 void CodeGenerator::visit( __attribute__((unused)) NullStmt * nullStmt ) {
[cda48b6]983 //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() );
[6c4ff37]984 output << "/* null statement */ ;";
[51587aa]985 }
986
[8688ce1]987 void CodeGenerator::visit( DeclStmt * declStmt ) {
[51587aa]988 declStmt->get_decl()->accept( *this );
[71f4e4f]989
[51587aa]990 if ( doSemicolon( declStmt->get_decl() ) ) {
[6c4ff37]991 output << ";";
[51587aa]992 } // if
993 }
994
[dd020c0]995 void CodeGenerator::handleStorageClass( DeclarationWithType * decl ) {
[fb04321]996 if ( decl->get_storageClasses().any() ) {
[6e8bd43]997 decl->get_storageClasses().print( output );
[a7c90d4]998 } // if
[dd020c0]999 } // CodeGenerator::handleStorageClass
[9facf3b]1000
1001 std::string genName( DeclarationWithType * decl ) {
1002 CodeGen::OperatorInfo opInfo;
1003 if ( operatorLookup( decl->get_name(), opInfo ) ) {
1004 return opInfo.outputName;
1005 } else {
1006 return decl->get_name();
1007 } // if
1008 }
[51b73452]1009} // namespace CodeGen
[51587aa]1010
1011// Local Variables: //
1012// tab-width: 4 //
1013// mode: c++ //
1014// compile-command: "make install" //
1015// End: //
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