source: src/CodeGen/CodeGenerator.cc@ bf30ab3

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 bf30ab3 was 9a1e509, checked in by Rob Schluntz <rschlunt@…>, 8 years ago

Merge branch 'master' into references
  • Property mode set to 100644
File size: 29.8 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
[bf2438c]16#include <cassert> // for assert, assertf
17#include <list> // for _List_iterator, list, list<>::it...
[51b73452]18
[a61fea9a]19#include "CodeGenerator.h"
[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
[c850687]81 CodeGenerator::LineMarker::LineMarker(
82 CodeLocation const & loc, bool toPrint) :
83 loc(loc), toPrint(toPrint)
84 {}
85
86 CodeGenerator::LineMarker CodeGenerator::lineDirective(
87 BaseSyntaxNode const * node) {
88 return LineMarker(node->location, lineMarks);
89 }
90
91 std::ostream & operator<<(std::ostream & out,
92 CodeGenerator::LineMarker const & marker) {
93 if (marker.toPrint && marker.loc.isSet()) {
94 return out << "\n# " << marker.loc.linenumber << " \""
95 << marker.loc.filename << "\"\n";
96 } else if (marker.toPrint) {
97 return out << "\n/* Missing CodeLocation */\n";
98 } else {
99 return out;
100 }
101 }
102
[f7cb0bc]103 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]104
[486341f]105 string CodeGenerator::mangleName( DeclarationWithType * decl ) {
[35b1bf4]106 if ( pretty ) return decl->get_name();
[51587aa]107 if ( decl->get_mangleName() != "" ) {
[f326f99]108 // need to incorporate scope level in order to differentiate names for destructors
109 return decl->get_scopedMangleName();
[51587aa]110 } else {
111 return decl->get_name();
112 } // if
113 }
[94b4364]114
[44a81853]115 void CodeGenerator::genAttributes( list< Attribute * > & attributes ) {
116 if ( attributes.empty() ) return;
117 output << "__attribute__ ((";
118 for ( list< Attribute * >::iterator attr( attributes.begin() );; ) {
119 output << (*attr)->get_name();
120 if ( ! (*attr)->get_parameters().empty() ) {
121 output << "(";
122 genCommaList( (*attr)->get_parameters().begin(), (*attr)->get_parameters().end() );
123 output << ")";
124 } // if
125 if ( ++attr == attributes.end() ) break;
126 output << ","; // separator
127 } // for
128 output << ")) ";
129 } // CodeGenerator::genAttributes
[7baed7d]130
131
[4810867]132 // *** Declarations
[8688ce1]133 void CodeGenerator::visit( FunctionDecl * functionDecl ) {
[8e9cbb2]134 extension( functionDecl );
[7baed7d]135 genAttributes( functionDecl->get_attributes() );
136
[51587aa]137 handleStorageClass( functionDecl );
[6e8bd43]138 functionDecl->get_funcSpec().print( output );
[dd020c0]139
[e39241b]140 output << genType( functionDecl->get_functionType(), mangleName( functionDecl ), pretty, genC );
[51587aa]141
[58dd019]142 asmName( functionDecl );
143
[51587aa]144 // acceptAll( functionDecl->get_oldDecls(), *this );
145 if ( functionDecl->get_statements() ) {
[7f5566b]146 functionDecl->get_statements()->accept( *this );
[51587aa]147 } // if
148 }
149
[8688ce1]150 void CodeGenerator::visit( ObjectDecl * objectDecl ) {
[e39241b]151 if (objectDecl->get_name().empty() && genC ) {
152 // only generate an anonymous name when generating C code, otherwise it clutters the output too much
[d9c8a59]153 static UniqueName name = { "__anonymous_object" };
154 objectDecl->set_name( name.newName() );
155 }
156
[8e9cbb2]157 extension( objectDecl );
[f9cebb5]158 genAttributes( objectDecl->get_attributes() );
159
[51587aa]160 handleStorageClass( objectDecl );
[e39241b]161 output << genType( objectDecl->get_type(), mangleName( objectDecl ), pretty, genC );
[71f4e4f]162
[58dd019]163 asmName( objectDecl );
164
[51587aa]165 if ( objectDecl->get_init() ) {
[6c4ff37]166 output << " = ";
[51587aa]167 objectDecl->get_init()->accept( *this );
168 } // if
[3778cb2]169
[51587aa]170 if ( objectDecl->get_bitfieldWidth() ) {
[6c4ff37]171 output << ":";
[51587aa]172 objectDecl->get_bitfieldWidth()->accept( *this );
173 } // if
174 }
175
[5f642e38]176 void CodeGenerator::handleAggregate( AggregateDecl * aggDecl, const std::string & kind ) {
[c0aa336]177 genAttributes( aggDecl->get_attributes() );
[35b1bf4]178
[e39241b]179 if( ! aggDecl->get_parameters().empty() && ! genC ) {
180 // assertf( ! genC, "Aggregate type parameters should not reach code generation." );
181 output << "forall(";
182 genCommaList( aggDecl->get_parameters().begin(), aggDecl->get_parameters().end() );
183 output << ")" << endl;
184 }
185
[29cf9c8]186 output << kind;
[51587aa]187 if ( aggDecl->get_name() != "" )
[6c4ff37]188 output << aggDecl->get_name();
[71f4e4f]189
[2c57025]190 if ( aggDecl->has_body() ) {
191 std::list< Declaration * > & memb = aggDecl->get_members();
[94b4364]192 output << " {" << endl;
[51587aa]193
[f7cb0bc]194 ++indent;
[3778cb2]195 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++ ) {
[4810867]196 output << lineDirective( *i ) << indent;
[7f5566b]197 (*i)->accept( *this );
[6c4ff37]198 output << ";" << endl;
[3778cb2]199 } // for
[51587aa]200
[f7cb0bc]201 --indent;
[51587aa]202
[cda48b6]203 output << indent << "}";
[17cd4eb]204 } // if
[51587aa]205 }
[17cd4eb]206
[8688ce1]207 void CodeGenerator::visit( StructDecl * structDecl ) {
[8e9cbb2]208 extension( structDecl );
[5f642e38]209 handleAggregate( structDecl, "struct " );
[51587aa]210 }
[17cd4eb]211
[8688ce1]212 void CodeGenerator::visit( UnionDecl * unionDecl ) {
[8e9cbb2]213 extension( unionDecl );
[5f642e38]214 handleAggregate( unionDecl, "union " );
[51587aa]215 }
[71f4e4f]216
[8688ce1]217 void CodeGenerator::visit( EnumDecl * enumDecl ) {
[8e9cbb2]218 extension( enumDecl );
[4810867]219 output << lineDirective ( enumDecl );
[6c4ff37]220 output << "enum ";
[c0aa336]221 genAttributes( enumDecl->get_attributes() );
[51587aa]222
[8e9cbb2]223 if ( enumDecl->get_name() != "" )
224 output << enumDecl->get_name();
[71f4e4f]225
[8e9cbb2]226 std::list< Declaration* > &memb = enumDecl->get_members();
[51587aa]227
228 if ( ! memb.empty() ) {
[cda48b6]229 output << " {" << endl;
[51587aa]230
[f7cb0bc]231 ++indent;
[51587aa]232 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) {
[8688ce1]233 ObjectDecl * obj = dynamic_cast< ObjectDecl* >( *i );
[51587aa]234 assert( obj );
[4810867]235 output << lineDirective( obj ) << indent << mangleName( obj );
[51587aa]236 if ( obj->get_init() ) {
[6c4ff37]237 output << " = ";
[7f5566b]238 obj->get_init()->accept( *this );
[51587aa]239 } // if
[6c4ff37]240 output << "," << endl;
[51587aa]241 } // for
242
[f7cb0bc]243 --indent;
[51587aa]244
[cda48b6]245 output << indent << "}";
[51587aa]246 } // if
247 }
[71f4e4f]248
[7e003011]249 void CodeGenerator::visit( __attribute__((unused)) TraitDecl * traitDecl ) {}
[71f4e4f]250
[8688ce1]251 void CodeGenerator::visit( TypedefDecl * typeDecl ) {
[e39241b]252 assertf( ! genC, "Typedefs are removed and substituted in earlier passes." );
[4810867]253 output << lineDirective( typeDecl );
[e39241b]254 output << "typedef ";
255 output << genType( typeDecl->get_base(), typeDecl->get_name(), pretty, genC ) << endl;
[51587aa]256 }
[71f4e4f]257
[8688ce1]258 void CodeGenerator::visit( TypeDecl * typeDecl ) {
[e39241b]259 if ( genC ) {
260 // really, we should mutate this into something that isn't a TypeDecl but that requires large-scale changes,
261 // still to be done
262 extension( typeDecl );
263 output << "extern unsigned long " << typeDecl->get_name();
264 if ( typeDecl->get_base() ) {
265 output << " = sizeof( " << genType( typeDecl->get_base(), "", pretty, genC ) << " )";
266 } // if
267 } else {
[bdd0755]268 output << typeDecl->genTypeString() << " " << typeDecl->get_name();
269 if ( typeDecl->get_kind() != TypeDecl::Any && typeDecl->get_sized() ) {
270 output << " | sized(" << typeDecl->get_name() << ")";
271 }
[e39241b]272 if ( ! typeDecl->get_assertions().empty() ) {
273 output << " | { ";
274 genCommaList( typeDecl->get_assertions().begin(), typeDecl->get_assertions().end() );
275 output << " }";
276 }
277 }
[51587aa]278 }
279
[e4d829b]280 void CodeGenerator::visit( Designation * designation ) {
281 std::list< Expression * > designators = designation->get_designators();
[e45215c]282 if ( designators.size() == 0 ) return;
[e4d829b]283 for ( Expression * des : designators ) {
[62423350]284 if ( dynamic_cast< NameExpr * >( des ) || dynamic_cast< VariableExpr * >( des ) ) {
285 // if expression is a NameExpr or VariableExpr, then initializing aggregate member
286 output << ".";
[e4d829b]287 des->accept( *this );
288 } else {
[62423350]289 // otherwise, it has to be a ConstantExpr or CastExpr, initializing array eleemnt
290 output << "[";
[e4d829b]291 des->accept( *this );
[62423350]292 output << "]";
[3778cb2]293 } // if
294 } // for
[e45215c]295 output << " = ";
296 }
297
[8688ce1]298 void CodeGenerator::visit( SingleInit * init ) {
[51587aa]299 init->get_value()->accept( *this );
300 }
301
[8688ce1]302 void CodeGenerator::visit( ListInit * init ) {
[e4d829b]303 auto initBegin = init->begin();
304 auto initEnd = init->end();
305 auto desigBegin = init->get_designations().begin();
306 auto desigEnd = init->get_designations().end();
307
[6c4ff37]308 output << "{ ";
[e4d829b]309 for ( ; initBegin != initEnd && desigBegin != desigEnd; ) {
310 (*desigBegin)->accept( *this );
311 (*initBegin)->accept( *this );
312 ++initBegin, ++desigBegin;
313 if ( initBegin != initEnd ) {
314 output << ", ";
315 }
316 }
[6c4ff37]317 output << " }";
[e4d829b]318 assertf( initBegin == initEnd && desigBegin == desigEnd, "Initializers and designators not the same length. %s", toString( init ).c_str() );
[51587aa]319 }
320
[7e003011]321 void CodeGenerator::visit( __attribute__((unused)) ConstructorInit * init ){
[e39241b]322 assertf( ! genC, "ConstructorInit nodes should not reach code generation." );
323 // xxx - generate something reasonable for constructor/destructor pairs
324 output << "<ctorinit>";
[fc638d2]325 }
326
[8688ce1]327 void CodeGenerator::visit( Constant * constant ) {
[6c4ff37]328 output << constant->get_value() ;
[51587aa]329 }
330
[4810867]331 // *** Expressions
[8688ce1]332 void CodeGenerator::visit( ApplicationExpr * applicationExpr ) {
[e04ef3a]333 extension( applicationExpr );
[8688ce1]334 if ( VariableExpr * varExpr = dynamic_cast< VariableExpr* >( applicationExpr->get_function() ) ) {
[51587aa]335 OperatorInfo opInfo;
336 if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( varExpr->get_var()->get_name(), opInfo ) ) {
337 std::list< Expression* >::iterator arg = applicationExpr->get_args().begin();
338 switch ( opInfo.type ) {
339 case OT_INDEX:
340 assert( applicationExpr->get_args().size() == 2 );
341 (*arg++)->accept( *this );
[6c4ff37]342 output << "[";
[51587aa]343 (*arg)->accept( *this );
[6c4ff37]344 output << "]";
[51587aa]345 break;
[71f4e4f]346
[51587aa]347 case OT_CALL:
[356189a]348 // there are no intrinsic definitions of the function call operator
[51587aa]349 assert( false );
350 break;
[71f4e4f]351
[f1e012b]352 case OT_CTOR:
[c2ce2350]353 case OT_DTOR:
[356189a]354 if ( applicationExpr->get_args().size() == 1 ) {
[8e9cbb2]355 // the expression fed into a single parameter constructor or destructor may contain side
356 // effects, so must still output this expression
[64071c2]357 output << "(";
[356189a]358 (*arg++)->accept( *this );
[64071c2]359 output << ") /* " << opInfo.inputName << " */";
[356189a]360 } else if ( applicationExpr->get_args().size() == 2 ) {
[c2ce2350]361 // intrinsic two parameter constructors are essentially bitwise assignment
[356189a]362 output << "(";
363 (*arg++)->accept( *this );
364 output << opInfo.symbol;
365 (*arg)->accept( *this );
[c2ce2350]366 output << ") /* " << opInfo.inputName << " */";
[356189a]367 } else {
[c2ce2350]368 // no constructors with 0 or more than 2 parameters
[356189a]369 assert( false );
[8688ce1]370 } // if
[356189a]371 break;
[f1e012b]372
[51587aa]373 case OT_PREFIX:
374 case OT_PREFIXASSIGN:
375 assert( applicationExpr->get_args().size() == 1 );
[6c4ff37]376 output << "(";
377 output << opInfo.symbol;
[51587aa]378 (*arg)->accept( *this );
[6c4ff37]379 output << ")";
[51587aa]380 break;
[71f4e4f]381
[51587aa]382 case OT_POSTFIX:
383 case OT_POSTFIXASSIGN:
384 assert( applicationExpr->get_args().size() == 1 );
385 (*arg)->accept( *this );
[6c4ff37]386 output << opInfo.symbol;
[51587aa]387 break;
388
[f1e012b]389
[51587aa]390 case OT_INFIX:
391 case OT_INFIXASSIGN:
392 assert( applicationExpr->get_args().size() == 2 );
[6c4ff37]393 output << "(";
[51587aa]394 (*arg++)->accept( *this );
[6c4ff37]395 output << opInfo.symbol;
[51587aa]396 (*arg)->accept( *this );
[6c4ff37]397 output << ")";
[51587aa]398 break;
[71f4e4f]399
[51587aa]400 case OT_CONSTANT:
[721f17a]401 case OT_LABELADDRESS:
402 // there are no intrinsic definitions of 0/1 or label addresses as functions
[51587aa]403 assert( false );
[3778cb2]404 } // switch
[17cd4eb]405 } else {
[51587aa]406 varExpr->accept( *this );
[6c4ff37]407 output << "(";
[51587aa]408 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]409 output << ")";
[17cd4eb]410 } // if
[51587aa]411 } else {
412 applicationExpr->get_function()->accept( *this );
[6c4ff37]413 output << "(";
[51587aa]414 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]415 output << ")";
[51587aa]416 } // if
417 }
[71f4e4f]418
[8688ce1]419 void CodeGenerator::visit( UntypedExpr * untypedExpr ) {
[e04ef3a]420 extension( untypedExpr );
[8688ce1]421 if ( NameExpr * nameExpr = dynamic_cast< NameExpr* >( untypedExpr->get_function() ) ) {
[51587aa]422 OperatorInfo opInfo;
423 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
424 std::list< Expression* >::iterator arg = untypedExpr->get_args().begin();
425 switch ( opInfo.type ) {
426 case OT_INDEX:
427 assert( untypedExpr->get_args().size() == 2 );
428 (*arg++)->accept( *this );
[6c4ff37]429 output << "[";
[51587aa]430 (*arg)->accept( *this );
[6c4ff37]431 output << "]";
[51587aa]432 break;
[71f4e4f]433
[51587aa]434 case OT_CALL:
[f1e012b]435 assert( false );
436
[c2ce2350]437 case OT_CTOR:
438 case OT_DTOR:
439 if ( untypedExpr->get_args().size() == 1 ) {
[8e9cbb2]440 // the expression fed into a single parameter constructor or destructor may contain side
441 // effects, so must still output this expression
[64071c2]442 output << "(";
[c2ce2350]443 (*arg++)->accept( *this );
[64071c2]444 output << ") /* " << opInfo.inputName << " */";
[c2ce2350]445 } else if ( untypedExpr->get_args().size() == 2 ) {
446 // intrinsic two parameter constructors are essentially bitwise assignment
447 output << "(";
448 (*arg++)->accept( *this );
449 output << opInfo.symbol;
450 (*arg)->accept( *this );
451 output << ") /* " << opInfo.inputName << " */";
452 } else {
453 // no constructors with 0 or more than 2 parameters
454 assert( false );
[3778cb2]455 } // if
[51587aa]456 break;
[71f4e4f]457
[51587aa]458 case OT_PREFIX:
459 case OT_PREFIXASSIGN:
[de62360d]460 case OT_LABELADDRESS:
[51587aa]461 assert( untypedExpr->get_args().size() == 1 );
[6c4ff37]462 output << "(";
463 output << opInfo.symbol;
[51587aa]464 (*arg)->accept( *this );
[6c4ff37]465 output << ")";
[51587aa]466 break;
[71f4e4f]467
[51587aa]468 case OT_POSTFIX:
469 case OT_POSTFIXASSIGN:
470 assert( untypedExpr->get_args().size() == 1 );
471 (*arg)->accept( *this );
[6c4ff37]472 output << opInfo.symbol;
[51587aa]473 break;
[71f4e4f]474
[51587aa]475 case OT_INFIX:
476 case OT_INFIXASSIGN:
477 assert( untypedExpr->get_args().size() == 2 );
[6c4ff37]478 output << "(";
[51587aa]479 (*arg++)->accept( *this );
[6c4ff37]480 output << opInfo.symbol;
[51587aa]481 (*arg)->accept( *this );
[6c4ff37]482 output << ")";
[51587aa]483 break;
[71f4e4f]484
[51587aa]485 case OT_CONSTANT:
486 // there are no intrinsic definitions of 0 or 1 as functions
487 assert( false );
[3778cb2]488 } // switch
[51587aa]489 } else {
[8688ce1]490 if ( nameExpr->get_name() == "..." ) { // case V1 ... V2 or case V1~V2
[ac911f4]491 assert( untypedExpr->get_args().size() == 2 );
492 (*untypedExpr->get_args().begin())->accept( *this );
493 output << " ... ";
494 (*--untypedExpr->get_args().end())->accept( *this );
[057b34f]495 } else { // builtin routines
496 nameExpr->accept( *this );
497 output << "(";
498 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
499 output << ")";
[66d12f7]500 } // if
[51587aa]501 } // if
502 } else {
503 untypedExpr->get_function()->accept( *this );
[6c4ff37]504 output << "(";
[51587aa]505 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
[6c4ff37]506 output << ")";
[51587aa]507 } // if
508 }
[71f4e4f]509
[064e3ff]510 void CodeGenerator::visit( RangeExpr * rangeExpr ) {
511 rangeExpr->get_low()->accept( *this );
512 output << " ... ";
513 rangeExpr->get_high()->accept( *this );
514 }
515
[8688ce1]516 void CodeGenerator::visit( NameExpr * nameExpr ) {
[e04ef3a]517 extension( nameExpr );
[51587aa]518 OperatorInfo opInfo;
519 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
520 assert( opInfo.type == OT_CONSTANT );
[6c4ff37]521 output << opInfo.symbol;
[51587aa]522 } else {
[6c4ff37]523 output << nameExpr->get_name();
[51587aa]524 } // if
525 }
[71f4e4f]526
[8688ce1]527 void CodeGenerator::visit( AddressExpr * addressExpr ) {
[e04ef3a]528 extension( addressExpr );
[6c4ff37]529 output << "(&";
[51587aa]530 // this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address
[8688ce1]531 if ( VariableExpr * variableExpr = dynamic_cast< VariableExpr* >( addressExpr->get_arg() ) ) {
[6c4ff37]532 output << mangleName( variableExpr->get_var() );
[51587aa]533 } else {
534 addressExpr->get_arg()->accept( *this );
535 } // if
[6c4ff37]536 output << ")";
[51587aa]537 }
538
[8688ce1]539 void CodeGenerator::visit( CastExpr * castExpr ) {
[e04ef3a]540 extension( castExpr );
[803deb1]541 output << "(";
[906e24d]542 if ( castExpr->get_result()->isVoid() ) {
[803deb1]543 output << "(void)" ;
[615a096]544 } else if ( ! castExpr->get_result()->get_lvalue() ) {
[803deb1]545 // at least one result type of cast, but not an lvalue
546 output << "(";
[e39241b]547 output << genType( castExpr->get_result(), "", pretty, genC );
[71f4e4f]548 output << ")";
[803deb1]549 } else {
[8e9cbb2]550 // otherwise, the cast is to an lvalue type, so the cast should be dropped, since the result of a cast is
[803deb1]551 // never an lvalue in C
[3778cb2]552 } // if
[803deb1]553 castExpr->get_arg()->accept( *this );
554 output << ")";
[51587aa]555 }
[71f4e4f]556
[8688ce1]557 void CodeGenerator::visit( UntypedMemberExpr * memberExpr ) {
[e39241b]558 assertf( ! genC, "UntypedMemberExpr should not reach code generation." );
559 extension( memberExpr );
560 memberExpr->get_aggregate()->accept( *this );
[5f642e38]561 output << ".";
562 memberExpr->get_member()->accept( *this );
[51587aa]563 }
[71f4e4f]564
[8688ce1]565 void CodeGenerator::visit( MemberExpr * memberExpr ) {
[e04ef3a]566 extension( memberExpr );
[51587aa]567 memberExpr->get_aggregate()->accept( *this );
[6c4ff37]568 output << "." << mangleName( memberExpr->get_member() );
[51587aa]569 }
[71f4e4f]570
[8688ce1]571 void CodeGenerator::visit( VariableExpr * variableExpr ) {
[e04ef3a]572 extension( variableExpr );
[51587aa]573 OperatorInfo opInfo;
574 if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) {
[6c4ff37]575 output << opInfo.symbol;
[51587aa]576 } else {
[6c4ff37]577 output << mangleName( variableExpr->get_var() );
[51587aa]578 } // if
579 }
[71f4e4f]580
[8688ce1]581 void CodeGenerator::visit( ConstantExpr * constantExpr ) {
[51587aa]582 assert( constantExpr->get_constant() );
[e04ef3a]583 extension( constantExpr );
[51587aa]584 constantExpr->get_constant()->accept( *this );
585 }
[71f4e4f]586
[8688ce1]587 void CodeGenerator::visit( SizeofExpr * sizeofExpr ) {
[e04ef3a]588 extension( sizeofExpr );
[6c4ff37]589 output << "sizeof(";
[51587aa]590 if ( sizeofExpr->get_isType() ) {
[e39241b]591 output << genType( sizeofExpr->get_type(), "", pretty, genC );
[51587aa]592 } else {
593 sizeofExpr->get_expr()->accept( *this );
594 } // if
[6c4ff37]595 output << ")";
[51587aa]596 }
[47534159]597
[8688ce1]598 void CodeGenerator::visit( AlignofExpr * alignofExpr ) {
[47534159]599 // use GCC extension to avoid bumping std to C11
[8e9cbb2]600 extension( alignofExpr );
[47534159]601 output << "__alignof__(";
[25a054f]602 if ( alignofExpr->get_isType() ) {
[e39241b]603 output << genType( alignofExpr->get_type(), "", pretty, genC );
[47534159]604 } else {
[25a054f]605 alignofExpr->get_expr()->accept( *this );
[47534159]606 } // if
607 output << ")";
608 }
[71f4e4f]609
[8688ce1]610 void CodeGenerator::visit( UntypedOffsetofExpr * offsetofExpr ) {
[e39241b]611 assertf( ! genC, "UntypedOffsetofExpr should not reach code generation." );
612 output << "offsetof(";
613 output << genType( offsetofExpr->get_type(), "", pretty, genC );
614 output << ", " << offsetofExpr->get_member();
615 output << ")";
[2a4b088]616 }
617
[8688ce1]618 void CodeGenerator::visit( OffsetofExpr * offsetofExpr ) {
[25a054f]619 // use GCC builtin
620 output << "__builtin_offsetof(";
[e39241b]621 output << genType( offsetofExpr->get_type(), "", pretty, genC );
[e551c69]622 output << ", " << mangleName( offsetofExpr->get_member() );
[25a054f]623 output << ")";
624 }
[d63eeb0]625
[8688ce1]626 void CodeGenerator::visit( OffsetPackExpr * offsetPackExpr ) {
[e39241b]627 assertf( ! genC, "OffsetPackExpr should not reach code generation." );
628 output << "__CFA_offsetpack(" << genType( offsetPackExpr->get_type(), "", pretty, genC ) << ")";
[afc1045]629 }
[70a06f6]630
[8688ce1]631 void CodeGenerator::visit( LogicalExpr * logicalExpr ) {
[e04ef3a]632 extension( logicalExpr );
[6c4ff37]633 output << "(";
[51587aa]634 logicalExpr->get_arg1()->accept( *this );
635 if ( logicalExpr->get_isAnd() ) {
[6c4ff37]636 output << " && ";
[51587aa]637 } else {
[6c4ff37]638 output << " || ";
[51587aa]639 } // if
640 logicalExpr->get_arg2()->accept( *this );
[6c4ff37]641 output << ")";
[51587aa]642 }
[71f4e4f]643
[8688ce1]644 void CodeGenerator::visit( ConditionalExpr * conditionalExpr ) {
[e04ef3a]645 extension( conditionalExpr );
[6c4ff37]646 output << "(";
[51587aa]647 conditionalExpr->get_arg1()->accept( *this );
[6c4ff37]648 output << " ? ";
[51587aa]649 conditionalExpr->get_arg2()->accept( *this );
[6c4ff37]650 output << " : ";
[51587aa]651 conditionalExpr->get_arg3()->accept( *this );
[6c4ff37]652 output << ")";
[51587aa]653 }
[71f4e4f]654
[8688ce1]655 void CodeGenerator::visit( CommaExpr * commaExpr ) {
[e04ef3a]656 extension( commaExpr );
[6c4ff37]657 output << "(";
[51587aa]658 commaExpr->get_arg1()->accept( *this );
[6c4ff37]659 output << " , ";
[51587aa]660 commaExpr->get_arg2()->accept( *this );
[6c4ff37]661 output << ")";
[51587aa]662 }
[71f4e4f]663
[e39241b]664 void CodeGenerator::visit( UntypedTupleExpr * tupleExpr ) {
665 assertf( ! genC, "UntypedTupleExpr should not reach code generation." );
[f975c65]666 extension( tupleExpr );
[e39241b]667 output << "[";
668 genCommaList( tupleExpr->get_exprs().begin(), tupleExpr->get_exprs().end() );
669 output << "]";
670 }
[907eccb]671
[e39241b]672 void CodeGenerator::visit( TupleExpr * tupleExpr ) {
673 assertf( ! genC, "TupleExpr should not reach code generation." );
[f975c65]674 extension( tupleExpr );
[e39241b]675 output << "[";
676 genCommaList( tupleExpr->get_exprs().begin(), tupleExpr->get_exprs().end() );
677 output << "]";
678 }
[71f4e4f]679
[f975c65]680 void CodeGenerator::visit( TupleIndexExpr * tupleExpr ) {
681 assertf( ! genC, "TupleIndexExpr should not reach code generation." );
682 extension( tupleExpr );
683 tupleExpr->get_tuple()->accept( *this );
684 output << "." << tupleExpr->get_index();
685 }
686
[e39241b]687 void CodeGenerator::visit( TypeExpr * typeExpr ) {
[e4d829b]688 // if ( genC ) std::cerr << "typeexpr still exists: " << typeExpr << std::endl;
689 // assertf( ! genC, "TypeExpr should not reach code generation." );
690 if ( ! genC ) {
691 output<< genType( typeExpr->get_type(), "", pretty, genC );
692 }
[e39241b]693 }
[2b6c1e0]694
[8688ce1]695 void CodeGenerator::visit( AsmExpr * asmExpr ) {
[7f5566b]696 if ( asmExpr->get_inout() ) {
697 output << "[ ";
698 asmExpr->get_inout()->accept( *this );
699 output << " ] ";
700 } // if
701 asmExpr->get_constraint()->accept( *this );
702 output << " ( ";
703 asmExpr->get_operand()->accept( *this );
704 output << " )";
705 }
706
[3c13c03]707 void CodeGenerator::visit( CompoundLiteralExpr *compLitExpr ) {
[fbcde64]708 assert( compLitExpr->get_result() && dynamic_cast< ListInit * > ( compLitExpr->get_initializer() ) );
[e39241b]709 output << "(" << genType( compLitExpr->get_result(), "", pretty, genC ) << ")";
[3c13c03]710 compLitExpr->get_initializer()->accept( *this );
711 }
712
[6eb8948]713 void CodeGenerator::visit( StmtExpr * stmtExpr ) {
[3c13c03]714 std::list< Statement * > & stmts = stmtExpr->get_statements()->get_kids();
[4810867]715 output << lineDirective( stmtExpr) << "({" << std::endl;
[f7cb0bc]716 ++indent;
[3c13c03]717 unsigned int numStmts = stmts.size();
718 unsigned int i = 0;
719 for ( Statement * stmt : stmts ) {
[4810867]720 output << lineDirective( stmt ) << indent;
721 output << printLabels( stmt->get_labels() );
[3c13c03]722 if ( i+1 == numStmts ) {
723 // last statement in a statement expression needs to be handled specially -
724 // cannot cast to void, otherwise the expression statement has no value
725 if ( ExprStmt * exprStmt = dynamic_cast< ExprStmt * >( stmt ) ) {
726 exprStmt->get_expr()->accept( *this );
727 output << ";" << endl;
728 ++i;
729 break;
730 }
731 }
732 stmt->accept( *this );
733 output << endl;
734 if ( wantSpacing( stmt ) ) {
735 output << endl;
736 } // if
737 ++i;
738 }
[f7cb0bc]739 --indent;
[3c13c03]740 output << indent << "})";
[6eb8948]741 }
742
[4810867]743 // *** Statements
[8688ce1]744 void CodeGenerator::visit( CompoundStmt * compoundStmt ) {
[51587aa]745 std::list<Statement*> ks = compoundStmt->get_kids();
[2b6c1e0]746 output << "{" << endl;
[51587aa]747
[f7cb0bc]748 ++indent;
[51587aa]749
[7f5566b]750 for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) {
[cda48b6]751 output << indent << printLabels( (*i)->get_labels() );
[7f5566b]752 (*i)->accept( *this );
[2b6c1e0]753
[6c4ff37]754 output << endl;
[2b6c1e0]755 if ( wantSpacing( *i ) ) {
756 output << endl;
[3778cb2]757 } // if
[8688ce1]758 } // for
[f7cb0bc]759 --indent;
[51587aa]760
[cda48b6]761 output << indent << "}";
[51587aa]762 }
763
[8688ce1]764 void CodeGenerator::visit( ExprStmt * exprStmt ) {
[6c4ff37]765 assert( exprStmt );
[262f085f]766 Expression * expr = exprStmt->get_expr();
767 if ( genC ) {
768 // cast the top-level expression to void to reduce gcc warnings.
769 expr = new CastExpr( expr );
770 }
[321a2481]771 expr->accept( *this );
772 output << ";";
[51587aa]773 }
774
[8688ce1]775 void CodeGenerator::visit( AsmStmt * asmStmt ) {
[7f5566b]776 output << "asm ";
777 if ( asmStmt->get_voltile() ) output << "volatile ";
778 if ( ! asmStmt->get_gotolabels().empty() ) output << "goto ";
779 output << "( ";
780 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
781 output << " : ";
782 genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() );
783 output << " : ";
784 genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() );
785 output << " : ";
786 genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() );
787 if ( ! asmStmt->get_gotolabels().empty() ) {
788 output << " : ";
789 for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) {
790 output << *begin++;
791 if ( begin == asmStmt->get_gotolabels().end() ) break;
792 output << ", ";
793 } // for
794 } // if
795 output << " );" ;
796 }
797
[e994912]798 void CodeGenerator::visit( AsmDecl * asmDecl ) {
799 output << "asm ";
800 AsmStmt * asmStmt = asmDecl->get_stmt();
801 output << "( ";
802 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
803 output << " )" ;
804 }
805
[8688ce1]806 void CodeGenerator::visit( IfStmt * ifStmt ) {
[4810867]807 output << lineDirective( ifStmt );
[7f5566b]808 output << "if ( ";
809 ifStmt->get_condition()->accept( *this );
810 output << " ) ";
[51587aa]811
[7f5566b]812 ifStmt->get_thenPart()->accept( *this );
[51587aa]813
814 if ( ifStmt->get_elsePart() != 0) {
[2b6c1e0]815 output << " else ";
[7f5566b]816 ifStmt->get_elsePart()->accept( *this );
[51587aa]817 } // if
818 }
819
[8688ce1]820 void CodeGenerator::visit( SwitchStmt * switchStmt ) {
[4810867]821 output << lineDirective( switchStmt );
[7f5566b]822 output << "switch ( " ;
823 switchStmt->get_condition()->accept( *this );
824 output << " ) ";
[71f4e4f]825
[2b6c1e0]826 output << "{" << std::endl;
[f7cb0bc]827 ++indent;
[8688ce1]828 acceptAll( switchStmt->get_statements(), *this );
[f7cb0bc]829 --indent;
[cda48b6]830 output << indent << "}";
[51587aa]831 }
832
[8688ce1]833 void CodeGenerator::visit( CaseStmt * caseStmt ) {
[4810867]834 output << lineDirective( caseStmt );
[cda48b6]835 output << indent;
[eb3261f]836 if ( caseStmt->isDefault()) {
[2b6c1e0]837 output << "default";
[eb3261f]838 } else {
[2b6c1e0]839 output << "case ";
[7f5566b]840 caseStmt->get_condition()->accept( *this );
[17cd4eb]841 } // if
[6c4ff37]842 output << ":\n";
[71f4e4f]843
[51587aa]844 std::list<Statement *> sts = caseStmt->get_statements();
845
[f7cb0bc]846 ++indent;
[51587aa]847 for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) {
[cda48b6]848 output << indent << printLabels( (*i)->get_labels() ) ;
[7f5566b]849 (*i)->accept( *this );
[6c4ff37]850 output << endl;
[3778cb2]851 } // for
[f7cb0bc]852 --indent;
[51587aa]853 }
854
[8688ce1]855 void CodeGenerator::visit( BranchStmt * branchStmt ) {
[51587aa]856 switch ( branchStmt->get_type()) {
857 case BranchStmt::Goto:
858 if ( ! branchStmt->get_target().empty() )
[6c4ff37]859 output << "goto " << branchStmt->get_target();
[71f4e4f]860 else {
[51587aa]861 if ( branchStmt->get_computedTarget() != 0 ) {
[6c4ff37]862 output << "goto *";
[51587aa]863 branchStmt->get_computedTarget()->accept( *this );
864 } // if
865 } // if
866 break;
867 case BranchStmt::Break:
[6c4ff37]868 output << "break";
[51587aa]869 break;
870 case BranchStmt::Continue:
[6c4ff37]871 output << "continue";
[51587aa]872 break;
[3778cb2]873 } // switch
[2b6c1e0]874 output << ";";
[51587aa]875 }
876
[8688ce1]877 void CodeGenerator::visit( ReturnStmt * returnStmt ) {
[6c4ff37]878 output << "return ";
[4b2589a]879 maybeAccept( returnStmt->get_expr(), *this );
[6c4ff37]880 output << ";";
[51587aa]881 }
882
[daf1af8]883 void CodeGenerator::visit( ThrowStmt * throwStmt ) {
884 assertf( ! genC, "Throw statements should not reach code generation." );
885
886 output << ((throwStmt->get_kind() == ThrowStmt::Terminate) ?
887 "throw" : "throwResume");
888 if (throwStmt->get_expr()) {
889 output << " ";
890 throwStmt->get_expr()->accept( *this );
891 }
892 if (throwStmt->get_target()) {
893 output << " _At ";
894 throwStmt->get_target()->accept( *this );
895 }
896 output << ";";
897 }
898
[8688ce1]899 void CodeGenerator::visit( WhileStmt * whileStmt ) {
[321a2481]900 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]901 output << "do" ;
[321a2481]902 } else {
[6c4ff37]903 output << "while (" ;
[7f5566b]904 whileStmt->get_condition()->accept( *this );
[6c4ff37]905 output << ")";
[51587aa]906 } // if
[2b6c1e0]907 output << " ";
[51587aa]908
[2b6c1e0]909 output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() );
[51587aa]910 whileStmt->get_body()->accept( *this );
911
[cda48b6]912 output << indent;
[51587aa]913
914 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]915 output << " while (" ;
[7f5566b]916 whileStmt->get_condition()->accept( *this );
[6c4ff37]917 output << ");";
[51587aa]918 } // if
919 }
920
[8688ce1]921 void CodeGenerator::visit( ForStmt * forStmt ) {
[8e9cbb2]922 // initialization is always hoisted, so don't bother doing anything with that
[145f1fc]923 output << "for (;";
[51587aa]924
[321a2481]925 if ( forStmt->get_condition() != 0 ) {
[51587aa]926 forStmt->get_condition()->accept( *this );
[3778cb2]927 } // if
[6c4ff37]928 output << ";";
[51587aa]929
[321a2481]930 if ( forStmt->get_increment() != 0 ) {
931 // cast the top-level expression to void to reduce gcc warnings.
932 Expression * expr = new CastExpr( forStmt->get_increment() );
933 expr->accept( *this );
[3778cb2]934 } // if
[2b6c1e0]935 output << ") ";
[51587aa]936
937 if ( forStmt->get_body() != 0 ) {
[2b6c1e0]938 output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() );
[51587aa]939 forStmt->get_body()->accept( *this );
940 } // if
941 }
942
[7e003011]943 void CodeGenerator::visit( __attribute__((unused)) NullStmt * nullStmt ) {
[cda48b6]944 //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() );
[6c4ff37]945 output << "/* null statement */ ;";
[51587aa]946 }
947
[8688ce1]948 void CodeGenerator::visit( DeclStmt * declStmt ) {
[51587aa]949 declStmt->get_decl()->accept( *this );
[71f4e4f]950
[51587aa]951 if ( doSemicolon( declStmt->get_decl() ) ) {
[6c4ff37]952 output << ";";
[51587aa]953 } // if
954 }
955
[dd020c0]956 void CodeGenerator::handleStorageClass( DeclarationWithType * decl ) {
[fb04321]957 if ( decl->get_storageClasses().any() ) {
[6e8bd43]958 decl->get_storageClasses().print( output );
[a7c90d4]959 } // if
[dd020c0]960 } // CodeGenerator::handleStorageClass
[9facf3b]961
962 std::string genName( DeclarationWithType * decl ) {
963 CodeGen::OperatorInfo opInfo;
964 if ( operatorLookup( decl->get_name(), opInfo ) ) {
965 return opInfo.outputName;
966 } else {
967 return decl->get_name();
968 } // if
969 }
[51b73452]970} // namespace CodeGen
[51587aa]971
972// Local Variables: //
973// tab-width: 4 //
974// mode: c++ //
975// compile-command: "make install" //
976// End: //
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