source: src/CodeGen/CodeGenerator.cc@ 6a45bd78

ADT arm-eh ast-experimental enum forall-pointer-decay jacob/cs343-translation new-ast-unique-expr pthread-emulation qualifiedEnum
Last change on this file since 6a45bd78 was 16ba4a6f, checked in by Fangren Yu <f37yu@…>, 5 years ago

factor out resolver calls in pre-resolution stage
  • Property mode set to 100644
File size: 37.5 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
[de8d7fb1]11// Last Modified By : Peter A. Buhr
[60a8062]12// Last Modified On : Sun Feb 16 08:32:48 2020
13// Update Count : 532
[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/UniqueName.h" // for UniqueName
21#include "Common/utility.h" // for CodeLocation, toString
22#include "GenType.h" // for genType
23#include "InitTweak/InitTweak.h" // for getPointerBase
24#include "OperatorTable.h" // for OperatorInfo, operatorLookup
[07de76b]25#include "SynTree/LinkageSpec.h" // for Spec, Intrinsic
[bf2438c]26#include "SynTree/Attribute.h" // for Attribute
27#include "SynTree/BaseSyntaxNode.h" // for BaseSyntaxNode
28#include "SynTree/Constant.h" // for Constant
29#include "SynTree/Declaration.h" // for DeclarationWithType, TypeDecl
30#include "SynTree/Expression.h" // for Expression, UntypedExpr, Applica...
31#include "SynTree/Initializer.h" // for Initializer, ListInit, Designation
32#include "SynTree/Label.h" // for Label, operator<<
33#include "SynTree/Statement.h" // for Statement, AsmStmt, BranchStmt
34#include "SynTree/Type.h" // for Type, Type::StorageClasses, Func...
[10a7775]35
[51b73452]36using namespace std;
37
38namespace CodeGen {
[6c4ff37]39 int CodeGenerator::tabsize = 4;
[51587aa]40
[60a8062]41 // The kinds of statements that would ideally be followed by whitespace.
[2b6c1e0]42 bool wantSpacing( Statement * stmt) {
43 return dynamic_cast< IfStmt * >( stmt ) || dynamic_cast< CompoundStmt * >( stmt ) ||
[08061589]44 dynamic_cast< WhileStmt * >( stmt ) || dynamic_cast< ForStmt * >( stmt ) || dynamic_cast< SwitchStmt *>( stmt );
[2b6c1e0]45 }
46
[8688ce1]47 void CodeGenerator::extension( Expression * expr ) {
[8e9cbb2]48 if ( expr->get_extension() ) {
49 output << "__extension__ ";
50 } // if
51 } // extension
52
[8688ce1]53 void CodeGenerator::extension( Declaration * decl ) {
[8e9cbb2]54 if ( decl->get_extension() ) {
55 output << "__extension__ ";
56 } // if
57 } // extension
58
[58dd019]59 void CodeGenerator::asmName( DeclarationWithType * decl ) {
[e612146c]60 if ( ConstantExpr * asmName = dynamic_cast<ConstantExpr *>(decl->get_asmName()) ) {
[58dd019]61 output << " asm ( " << asmName->get_constant()->get_value() << " )";
62 } // if
63 } // extension
64
[888cbe4]65 CodeGenerator::LabelPrinter & CodeGenerator::LabelPrinter::operator()( std::list< Label > & l ) {
66 labels = &l;
67 return *this;
68 }
69
[8688ce1]70 ostream & operator<<( ostream & output, CodeGenerator::LabelPrinter & printLabels ) {
[888cbe4]71 std::list< Label > & labs = *printLabels.labels;
72 // l.unique(); // assumes a sorted list. Why not use set? Does order matter?
73 for ( Label & l : labs ) {
74 output << l.get_name() + ": ";
75 printLabels.cg.genAttributes( l.get_attributes() );
[8688ce1]76 } // for
[888cbe4]77 return output;
78 }
79
[60a8062]80 // Using updateLocation at the beginning of a node and endl within a node should become the method of formating.
[8bafacc]81 void CodeGenerator::updateLocation( CodeLocation const & to ) {
[d22e90f]82 // skip if linemarks shouldn't appear or if codelocation is unset
[42a36d9]83 if ( !options.lineMarks || to.isUnset() ) return;
[d22e90f]84
85 if ( currentLocation.followedBy( to, 0 ) ) {
[8bafacc]86 return;
87 } else if ( currentLocation.followedBy( to, 1 ) ) {
88 output << "\n" << indent;
[d48e529]89 currentLocation.first_line += 1;
[8bafacc]90 } else if ( currentLocation.followedBy( to, 2 ) ) {
91 output << "\n\n" << indent;
[d48e529]92 currentLocation.first_line += 2;
[8bafacc]93 } else {
[d48e529]94 output << "\n# " << to.first_line << " \"" << to.filename
[60a8062]95 << "\"\n" << indent;
[8bafacc]96 currentLocation = to;
97 }
98 output << std::flush;
99 }
[c850687]100
[8bafacc]101 void CodeGenerator::updateLocation( BaseSyntaxNode const * to ) {
102 updateLocation( to->location );
[c850687]103 }
104
[d22e90f]105 // replace endl
106 ostream & CodeGenerator::LineEnder::operator()( ostream & os ) const {
107 // if ( !cg.lineMarks ) {
108 // os << "\n" << cg.indent << std::flush;
109 // }
110 os << "\n" << std::flush;
111 cg.currentLocation.first_line++;
112 // os << "/* did endl; current loc is: " << cg.currentLocation.first_line << "*/";
113 return os;
[c850687]114 }
115
[4e5e6cc]116 CodeGenerator::CodeGenerator( std::ostream & os, bool pretty, bool genC, bool lineMarks, bool printExprTypes ) : indent( 0, CodeGenerator::tabsize ), output( os ), printLabels( *this ), options( pretty, genC, lineMarks, printExprTypes ), endl( *this ) {}
117 CodeGenerator::CodeGenerator( std::ostream & os, const Options &options ) : indent( 0, CodeGenerator::tabsize ), output( os ), printLabels( *this ), options(options), endl( *this ) {}
[cda48b6]118
[486341f]119 string CodeGenerator::mangleName( DeclarationWithType * decl ) {
[13073be]120 // GCC builtins should always be printed unmangled
[42a36d9]121 if ( options.pretty || decl->linkage.is_gcc_builtin ) return decl->name;
[16ba4a6f]122 if ( LinkageSpec::isMangled(decl->linkage) && decl->mangleName != "" ) {
[f326f99]123 // need to incorporate scope level in order to differentiate names for destructors
124 return decl->get_scopedMangleName();
[51587aa]125 } else {
[13073be]126 return decl->name;
[51587aa]127 } // if
128 }
[94b4364]129
[44a81853]130 void CodeGenerator::genAttributes( list< Attribute * > & attributes ) {
[60a8062]131 if ( attributes.empty() ) return;
[44a81853]132 output << "__attribute__ ((";
133 for ( list< Attribute * >::iterator attr( attributes.begin() );; ) {
[85b2300]134 output << (*attr)->name;
135 if ( ! (*attr)->parameters.empty() ) {
[44a81853]136 output << "(";
[85b2300]137 genCommaList( (*attr)->parameters.begin(), (*attr)->parameters.end() );
[44a81853]138 output << ")";
139 } // if
[60a8062]140 if ( ++attr == attributes.end() ) break;
[44a81853]141 output << ","; // separator
142 } // for
143 output << ")) ";
144 } // CodeGenerator::genAttributes
[7baed7d]145
[9857e8d]146 // *** BaseSyntaxNode
[d22e90f]147 void CodeGenerator::previsit( BaseSyntaxNode * node ) {
[9857e8d]148 // turn off automatic recursion for all nodes, to allow each visitor to
149 // precisely control the order in which its children are visited.
150 visit_children = false;
[d22e90f]151 updateLocation( node );
[9857e8d]152 }
153
154 // *** BaseSyntaxNode
155 void CodeGenerator::postvisit( BaseSyntaxNode * node ) {
156 std::stringstream ss;
157 node->print( ss );
158 assertf( false, "Unhandled node reached in CodeGenerator: %s", ss.str().c_str() );
159 }
[7baed7d]160
[5f08961d]161 // *** Expression
162 void CodeGenerator::previsit( Expression * node ) {
163 previsit( (BaseSyntaxNode *)node );
164 GuardAction( [this, node](){
[60a8062]165 if ( options.printExprTypes && node->result ) {
166 output << " /* " << genType( node->result, "", options ) << " */ ";
167 }
168 } );
[5f08961d]169 }
170
[4810867]171 // *** Declarations
[9857e8d]172 void CodeGenerator::postvisit( FunctionDecl * functionDecl ) {
[3ed994e]173 // deleted decls should never be used, so don't print them
[42a36d9]174 if ( functionDecl->isDeleted && options.genC ) return;
[8e9cbb2]175 extension( functionDecl );
[7baed7d]176 genAttributes( functionDecl->get_attributes() );
177
[51587aa]178 handleStorageClass( functionDecl );
[6e8bd43]179 functionDecl->get_funcSpec().print( output );
[dd020c0]180
[da09ba1]181 Options subOptions = options;
[76f7fc7]182 subOptions.anonymousUnused = functionDecl->has_body();
[da09ba1]183 output << genType( functionDecl->get_functionType(), mangleName( functionDecl ), subOptions );
[51587aa]184
[58dd019]185 asmName( functionDecl );
186
[51587aa]187 if ( functionDecl->get_statements() ) {
[9857e8d]188 functionDecl->get_statements()->accept( *visitor );
[51587aa]189 } // if
[3ed994e]190 if ( functionDecl->isDeleted ) {
191 output << " = void";
192 }
[51587aa]193 }
194
[9857e8d]195 void CodeGenerator::postvisit( ObjectDecl * objectDecl ) {
[3ed994e]196 // deleted decls should never be used, so don't print them
[42a36d9]197 if ( objectDecl->isDeleted && options.genC ) return;
[de8d7fb1]198
199 // gcc allows an empty declarator (no name) for bit-fields and C states: 6.7.2.1 Structure and union specifiers,
200 // point 4, page 113: If the (bit field) value is zero, the declaration shall have no declarator. For anything
201 // else, the anonymous name refers to the anonymous object for plan9 inheritance.
202 if ( objectDecl->get_name().empty() && options.genC && ! objectDecl->get_bitfieldWidth() ) {
[e39241b]203 // only generate an anonymous name when generating C code, otherwise it clutters the output too much
[d9c8a59]204 static UniqueName name = { "__anonymous_object" };
205 objectDecl->set_name( name.newName() );
[de8d7fb1]206 // Stops unused parameter warnings.
207 if ( options.anonymousUnused ) {
208 objectDecl->attributes.push_back( new Attribute( "unused" ) );
209 }
[d9c8a59]210 }
211
[8e9cbb2]212 extension( objectDecl );
[f9cebb5]213 genAttributes( objectDecl->get_attributes() );
214
[51587aa]215 handleStorageClass( objectDecl );
[42a36d9]216 output << genType( objectDecl->get_type(), mangleName( objectDecl ), options.pretty, options.genC );
[71f4e4f]217
[58dd019]218 asmName( objectDecl );
219
[51587aa]220 if ( objectDecl->get_init() ) {
[6c4ff37]221 output << " = ";
[9857e8d]222 objectDecl->get_init()->accept( *visitor );
[51587aa]223 } // if
[3ed994e]224 if ( objectDecl->isDeleted ) {
225 output << " = void";
226 }
[3778cb2]227
[51587aa]228 if ( objectDecl->get_bitfieldWidth() ) {
[6c4ff37]229 output << ":";
[9857e8d]230 objectDecl->get_bitfieldWidth()->accept( *visitor );
[51587aa]231 } // if
232 }
233
[5f642e38]234 void CodeGenerator::handleAggregate( AggregateDecl * aggDecl, const std::string & kind ) {
[42a36d9]235 if( ! aggDecl->parameters.empty() && ! options.genC ) {
[e39241b]236 // assertf( ! genC, "Aggregate type parameters should not reach code generation." );
237 output << "forall(";
[0b3b2ae]238 genCommaList( aggDecl->parameters.begin(), aggDecl->parameters.end() );
[e39241b]239 output << ")" << endl;
[e6cee92]240 output << indent;
[e39241b]241 }
242
[593370c]243 output << kind;
[0b3b2ae]244 genAttributes( aggDecl->attributes );
245 output << aggDecl->name;
[71f4e4f]246
[2c57025]247 if ( aggDecl->has_body() ) {
[0b3b2ae]248 std::list< Declaration * > & memb = aggDecl->members;
[94b4364]249 output << " {" << endl;
[51587aa]250
[f7cb0bc]251 ++indent;
[3778cb2]252 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++ ) {
[87e08e24]253 output << indent;
[9857e8d]254 (*i)->accept( *visitor );
[6c4ff37]255 output << ";" << endl;
[3778cb2]256 } // for
[51587aa]257
[f7cb0bc]258 --indent;
[51587aa]259
[cda48b6]260 output << indent << "}";
[17cd4eb]261 } // if
[51587aa]262 }
[17cd4eb]263
[9857e8d]264 void CodeGenerator::postvisit( StructDecl * structDecl ) {
[8e9cbb2]265 extension( structDecl );
[5f642e38]266 handleAggregate( structDecl, "struct " );
[51587aa]267 }
[17cd4eb]268
[9857e8d]269 void CodeGenerator::postvisit( UnionDecl * unionDecl ) {
[8e9cbb2]270 extension( unionDecl );
[5f642e38]271 handleAggregate( unionDecl, "union " );
[51587aa]272 }
[71f4e4f]273
[9857e8d]274 void CodeGenerator::postvisit( EnumDecl * enumDecl ) {
[8e9cbb2]275 extension( enumDecl );
[6c4ff37]276 output << "enum ";
[c0aa336]277 genAttributes( enumDecl->get_attributes() );
[51587aa]278
[a984e65]279 output << enumDecl->get_name();
[71f4e4f]280
[8e9cbb2]281 std::list< Declaration* > &memb = enumDecl->get_members();
[51587aa]282
283 if ( ! memb.empty() ) {
[cda48b6]284 output << " {" << endl;
[51587aa]285
[f7cb0bc]286 ++indent;
[51587aa]287 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) {
[8688ce1]288 ObjectDecl * obj = dynamic_cast< ObjectDecl* >( *i );
[51587aa]289 assert( obj );
[87e08e24]290 output << indent << mangleName( obj );
[51587aa]291 if ( obj->get_init() ) {
[6c4ff37]292 output << " = ";
[9857e8d]293 obj->get_init()->accept( *visitor );
[51587aa]294 } // if
[6c4ff37]295 output << "," << endl;
[51587aa]296 } // for
297
[f7cb0bc]298 --indent;
[51587aa]299
[cda48b6]300 output << indent << "}";
[51587aa]301 } // if
302 }
[71f4e4f]303
[9857e8d]304 void CodeGenerator::postvisit( TraitDecl * traitDecl ) {
[42a36d9]305 assertf( ! options.genC, "TraitDecls should not reach code generation." );
[a984e65]306 extension( traitDecl );
307 handleAggregate( traitDecl, "trait " );
308 }
[71f4e4f]309
[9857e8d]310 void CodeGenerator::postvisit( TypedefDecl * typeDecl ) {
[42a36d9]311 assertf( ! options.genC, "Typedefs are removed and substituted in earlier passes." );
[e39241b]312 output << "typedef ";
[42a36d9]313 output << genType( typeDecl->get_base(), typeDecl->get_name(), options ) << endl;
[51587aa]314 }
[71f4e4f]315
[9857e8d]316 void CodeGenerator::postvisit( TypeDecl * typeDecl ) {
[42a36d9]317 assertf( ! options.genC, "TypeDecls should not reach code generation." );
[ab4bff5]318 output << typeDecl->genTypeString() << " " << typeDecl->name;
[f0ecf9b]319 if ( typeDecl->sized ) {
[ab4bff5]320 output << " | sized(" << typeDecl->name << ")";
[a0c7dc36]321 }
[ab4bff5]322 if ( ! typeDecl->assertions.empty() ) {
[a0c7dc36]323 output << " | { ";
[ab4bff5]324 for ( DeclarationWithType * assert : typeDecl->assertions ) {
325 assert->accept( *visitor );
326 output << "; ";
327 }
[a0c7dc36]328 output << " }";
[e39241b]329 }
[51587aa]330 }
331
[92fea32]332 void CodeGenerator::postvisit( StaticAssertDecl * assertDecl ) {
333 output << "_Static_assert(";
334 assertDecl->condition->accept( *visitor );
335 output << ", ";
336 assertDecl->message->accept( *visitor );
337 output << ")";
338 }
339
[9857e8d]340 void CodeGenerator::postvisit( Designation * designation ) {
[e4d829b]341 std::list< Expression * > designators = designation->get_designators();
[e45215c]342 if ( designators.size() == 0 ) return;
[e4d829b]343 for ( Expression * des : designators ) {
[62423350]344 if ( dynamic_cast< NameExpr * >( des ) || dynamic_cast< VariableExpr * >( des ) ) {
345 // if expression is a NameExpr or VariableExpr, then initializing aggregate member
346 output << ".";
[9857e8d]347 des->accept( *visitor );
[e4d829b]348 } else {
[62423350]349 // otherwise, it has to be a ConstantExpr or CastExpr, initializing array eleemnt
350 output << "[";
[9857e8d]351 des->accept( *visitor );
[62423350]352 output << "]";
[3778cb2]353 } // if
354 } // for
[e45215c]355 output << " = ";
356 }
357
[9857e8d]358 void CodeGenerator::postvisit( SingleInit * init ) {
359 init->get_value()->accept( *visitor );
[51587aa]360 }
361
[9857e8d]362 void CodeGenerator::postvisit( ListInit * init ) {
[e4d829b]363 auto initBegin = init->begin();
364 auto initEnd = init->end();
365 auto desigBegin = init->get_designations().begin();
366 auto desigEnd = init->get_designations().end();
367
[6c4ff37]368 output << "{ ";
[e4d829b]369 for ( ; initBegin != initEnd && desigBegin != desigEnd; ) {
[9857e8d]370 (*desigBegin)->accept( *visitor );
371 (*initBegin)->accept( *visitor );
[e4d829b]372 ++initBegin, ++desigBegin;
373 if ( initBegin != initEnd ) {
374 output << ", ";
375 }
376 }
[6c4ff37]377 output << " }";
[e4d829b]378 assertf( initBegin == initEnd && desigBegin == desigEnd, "Initializers and designators not the same length. %s", toString( init ).c_str() );
[51587aa]379 }
380
[d22e90f]381 void CodeGenerator::postvisit( ConstructorInit * init ){
[42a36d9]382 assertf( ! options.genC, "ConstructorInit nodes should not reach code generation." );
[e6cee92]383 // pseudo-output for constructor/destructor pairs
[d22e90f]384 output << "<ctorinit>{" << endl << ++indent << "ctor: ";
[9857e8d]385 maybeAccept( init->get_ctor(), *visitor );
[d22e90f]386 output << ", " << endl << indent << "dtor: ";
[9857e8d]387 maybeAccept( init->get_dtor(), *visitor );
[d22e90f]388 output << endl << --indent << "}";
[fc638d2]389 }
390
[9857e8d]391 void CodeGenerator::postvisit( Constant * constant ) {
[d7312ac]392 output << constant->get_value();
[51587aa]393 }
394
[4810867]395 // *** Expressions
[9857e8d]396 void CodeGenerator::postvisit( ApplicationExpr * applicationExpr ) {
[e04ef3a]397 extension( applicationExpr );
[8688ce1]398 if ( VariableExpr * varExpr = dynamic_cast< VariableExpr* >( applicationExpr->get_function() ) ) {
[60a8062]399 const OperatorInfo * opInfo;
400 if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && ( opInfo = operatorLookup( varExpr->get_var()->get_name() ) ) ) {
[51587aa]401 std::list< Expression* >::iterator arg = applicationExpr->get_args().begin();
[60a8062]402 switch ( opInfo->type ) {
[51587aa]403 case OT_INDEX:
404 assert( applicationExpr->get_args().size() == 2 );
[9857e8d]405 (*arg++)->accept( *visitor );
[6c4ff37]406 output << "[";
[9857e8d]407 (*arg)->accept( *visitor );
[6c4ff37]408 output << "]";
[51587aa]409 break;
[71f4e4f]410
[51587aa]411 case OT_CALL:
[356189a]412 // there are no intrinsic definitions of the function call operator
[51587aa]413 assert( false );
414 break;
[71f4e4f]415
[f1e012b]416 case OT_CTOR:
[c2ce2350]417 case OT_DTOR:
[356189a]418 if ( applicationExpr->get_args().size() == 1 ) {
[8e9cbb2]419 // the expression fed into a single parameter constructor or destructor may contain side
420 // effects, so must still output this expression
[64071c2]421 output << "(";
[9857e8d]422 (*arg++)->accept( *visitor );
[60a8062]423 output << ") /* " << opInfo->inputName << " */";
[356189a]424 } else if ( applicationExpr->get_args().size() == 2 ) {
[c2ce2350]425 // intrinsic two parameter constructors are essentially bitwise assignment
[356189a]426 output << "(";
[9857e8d]427 (*arg++)->accept( *visitor );
[60a8062]428 output << opInfo->symbol;
[9857e8d]429 (*arg)->accept( *visitor );
[60a8062]430 output << ") /* " << opInfo->inputName << " */";
[356189a]431 } else {
[c2ce2350]432 // no constructors with 0 or more than 2 parameters
[356189a]433 assert( false );
[8688ce1]434 } // if
[356189a]435 break;
[f1e012b]436
[51587aa]437 case OT_PREFIX:
438 case OT_PREFIXASSIGN:
439 assert( applicationExpr->get_args().size() == 1 );
[6c4ff37]440 output << "(";
[60a8062]441 output << opInfo->symbol;
[9857e8d]442 (*arg)->accept( *visitor );
[6c4ff37]443 output << ")";
[51587aa]444 break;
[71f4e4f]445
[51587aa]446 case OT_POSTFIX:
447 case OT_POSTFIXASSIGN:
448 assert( applicationExpr->get_args().size() == 1 );
[9857e8d]449 (*arg)->accept( *visitor );
[60a8062]450 output << opInfo->symbol;
[51587aa]451 break;
452
[f1e012b]453
[51587aa]454 case OT_INFIX:
455 case OT_INFIXASSIGN:
456 assert( applicationExpr->get_args().size() == 2 );
[6c4ff37]457 output << "(";
[9857e8d]458 (*arg++)->accept( *visitor );
[60a8062]459 output << opInfo->symbol;
[9857e8d]460 (*arg)->accept( *visitor );
[6c4ff37]461 output << ")";
[51587aa]462 break;
[71f4e4f]463
[51587aa]464 case OT_CONSTANT:
[721f17a]465 case OT_LABELADDRESS:
466 // there are no intrinsic definitions of 0/1 or label addresses as functions
[51587aa]467 assert( false );
[3778cb2]468 } // switch
[17cd4eb]469 } else {
[9857e8d]470 varExpr->accept( *visitor );
[6c4ff37]471 output << "(";
[51587aa]472 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]473 output << ")";
[17cd4eb]474 } // if
[51587aa]475 } else {
[9857e8d]476 applicationExpr->get_function()->accept( *visitor );
[6c4ff37]477 output << "(";
[51587aa]478 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]479 output << ")";
[51587aa]480 } // if
481 }
[71f4e4f]482
[9857e8d]483 void CodeGenerator::postvisit( UntypedExpr * untypedExpr ) {
[e04ef3a]484 extension( untypedExpr );
[22bc276]485 if ( NameExpr * nameExpr = dynamic_cast< NameExpr* >( untypedExpr->function ) ) {
[60a8062]486 const OperatorInfo * opInfo = operatorLookup( nameExpr->name );
487 if ( opInfo ) {
[22bc276]488 std::list< Expression* >::iterator arg = untypedExpr->args.begin();
[60a8062]489 switch ( opInfo->type ) {
[51587aa]490 case OT_INDEX:
[22bc276]491 assert( untypedExpr->args.size() == 2 );
[9857e8d]492 (*arg++)->accept( *visitor );
[6c4ff37]493 output << "[";
[9857e8d]494 (*arg)->accept( *visitor );
[6c4ff37]495 output << "]";
[51587aa]496 break;
[71f4e4f]497
[51587aa]498 case OT_CALL:
[f1e012b]499 assert( false );
500
[c2ce2350]501 case OT_CTOR:
502 case OT_DTOR:
[22bc276]503 if ( untypedExpr->args.size() == 1 ) {
[8e9cbb2]504 // the expression fed into a single parameter constructor or destructor may contain side
505 // effects, so must still output this expression
[64071c2]506 output << "(";
[9857e8d]507 (*arg++)->accept( *visitor );
[60a8062]508 output << ") /* " << opInfo->inputName << " */";
[c2ce2350]509 } else if ( untypedExpr->get_args().size() == 2 ) {
510 // intrinsic two parameter constructors are essentially bitwise assignment
511 output << "(";
[9857e8d]512 (*arg++)->accept( *visitor );
[60a8062]513 output << opInfo->symbol;
[9857e8d]514 (*arg)->accept( *visitor );
[60a8062]515 output << ") /* " << opInfo->inputName << " */";
[c2ce2350]516 } else {
517 // no constructors with 0 or more than 2 parameters
[42a36d9]518 assertf( ! options.genC, "UntypedExpr constructor/destructor with 0 or more than 2 parameters." );
[4e8949f]519 output << "(";
520 (*arg++)->accept( *visitor );
[60a8062]521 output << opInfo->symbol << "{ ";
[22bc276]522 genCommaList( arg, untypedExpr->args.end() );
[60a8062]523 output << "}) /* " << opInfo->inputName << " */";
[3778cb2]524 } // if
[51587aa]525 break;
[71f4e4f]526
[51587aa]527 case OT_PREFIX:
528 case OT_PREFIXASSIGN:
[de62360d]529 case OT_LABELADDRESS:
[22bc276]530 assert( untypedExpr->args.size() == 1 );
[6c4ff37]531 output << "(";
[60a8062]532 output << opInfo->symbol;
[9857e8d]533 (*arg)->accept( *visitor );
[6c4ff37]534 output << ")";
[51587aa]535 break;
[71f4e4f]536
[51587aa]537 case OT_POSTFIX:
538 case OT_POSTFIXASSIGN:
[22bc276]539 assert( untypedExpr->args.size() == 1 );
[9857e8d]540 (*arg)->accept( *visitor );
[60a8062]541 output << opInfo->symbol;
[51587aa]542 break;
[71f4e4f]543
[51587aa]544 case OT_INFIX:
545 case OT_INFIXASSIGN:
[22bc276]546 assert( untypedExpr->args.size() == 2 );
[6c4ff37]547 output << "(";
[9857e8d]548 (*arg++)->accept( *visitor );
[60a8062]549 output << opInfo->symbol;
[9857e8d]550 (*arg)->accept( *visitor );
[6c4ff37]551 output << ")";
[51587aa]552 break;
[71f4e4f]553
[51587aa]554 case OT_CONSTANT:
555 // there are no intrinsic definitions of 0 or 1 as functions
556 assert( false );
[3778cb2]557 } // switch
[51587aa]558 } else {
[22bc276]559 // builtin routines
560 nameExpr->accept( *visitor );
561 output << "(";
562 genCommaList( untypedExpr->args.begin(), untypedExpr->args.end() );
563 output << ")";
[51587aa]564 } // if
565 } else {
[22bc276]566 untypedExpr->function->accept( *visitor );
[6c4ff37]567 output << "(";
[22bc276]568 genCommaList( untypedExpr->args.begin(), untypedExpr->args.end() );
[6c4ff37]569 output << ")";
[51587aa]570 } // if
571 }
[71f4e4f]572
[9857e8d]573 void CodeGenerator::postvisit( RangeExpr * rangeExpr ) {
[22bc276]574 rangeExpr->low->accept( *visitor );
[064e3ff]575 output << " ... ";
[22bc276]576 rangeExpr->high->accept( *visitor );
[064e3ff]577 }
578
[9857e8d]579 void CodeGenerator::postvisit( NameExpr * nameExpr ) {
[e04ef3a]580 extension( nameExpr );
[60a8062]581 const OperatorInfo * opInfo = operatorLookup( nameExpr->name );
582 if ( opInfo ) {
583 if ( opInfo->type == OT_CONSTANT ) {
584 output << opInfo->symbol;
[5ea7a22]585 } else {
[60a8062]586 output << opInfo->outputName;
[5ea7a22]587 }
[51587aa]588 } else {
[6c4ff37]589 output << nameExpr->get_name();
[51587aa]590 } // if
591 }
[71f4e4f]592
[9857e8d]593 void CodeGenerator::postvisit( AddressExpr * addressExpr ) {
[e04ef3a]594 extension( addressExpr );
[6c4ff37]595 output << "(&";
[9857e8d]596 addressExpr->arg->accept( *visitor );
[6c4ff37]597 output << ")";
[51587aa]598 }
599
[9857e8d]600 void CodeGenerator::postvisit( LabelAddressExpr *addressExpr ) {
[5809461]601 extension( addressExpr );
602 output << "(&&" << addressExpr->arg << ")";
603 }
604
[9857e8d]605 void CodeGenerator::postvisit( CastExpr * castExpr ) {
[e04ef3a]606 extension( castExpr );
[803deb1]607 output << "(";
[906e24d]608 if ( castExpr->get_result()->isVoid() ) {
[d7312ac]609 output << "(void)";
[d104b02]610 } else {
611 // at least one result type of cast.
612 // Note: previously, lvalue casts were skipped. Since it's now impossible for the user to write
613 // an lvalue cast, this has been taken out.
[803deb1]614 output << "(";
[42a36d9]615 output << genType( castExpr->get_result(), "", options );
[71f4e4f]616 output << ")";
[3778cb2]617 } // if
[da9d79b]618 castExpr->arg->accept( *visitor );
619 output << ")";
620 }
621
622 void CodeGenerator::postvisit( KeywordCastExpr * castExpr ) {
[42a36d9]623 assertf( ! options.genC, "KeywordCast should not reach code generation." );
[da9d79b]624 extension( castExpr );
625 output << "((" << castExpr->targetString() << " &)";
626 castExpr->arg->accept( *visitor );
[803deb1]627 output << ")";
[51587aa]628 }
[71f4e4f]629
[9857e8d]630 void CodeGenerator::postvisit( VirtualCastExpr * castExpr ) {
[42a36d9]631 assertf( ! options.genC, "VirtualCastExpr should not reach code generation." );
[a5f0529]632 extension( castExpr );
633 output << "(virtual ";
[9857e8d]634 castExpr->get_arg()->accept( *visitor );
[a5f0529]635 output << ")";
636 }
637
[9857e8d]638 void CodeGenerator::postvisit( UntypedMemberExpr * memberExpr ) {
[42a36d9]639 assertf( ! options.genC, "UntypedMemberExpr should not reach code generation." );
[e39241b]640 extension( memberExpr );
[9857e8d]641 memberExpr->get_aggregate()->accept( *visitor );
[5f642e38]642 output << ".";
[9857e8d]643 memberExpr->get_member()->accept( *visitor );
[51587aa]644 }
[71f4e4f]645
[9857e8d]646 void CodeGenerator::postvisit( MemberExpr * memberExpr ) {
[e04ef3a]647 extension( memberExpr );
[9857e8d]648 memberExpr->get_aggregate()->accept( *visitor );
[6c4ff37]649 output << "." << mangleName( memberExpr->get_member() );
[51587aa]650 }
[71f4e4f]651
[9857e8d]652 void CodeGenerator::postvisit( VariableExpr * variableExpr ) {
[e04ef3a]653 extension( variableExpr );
[60a8062]654 const OperatorInfo * opInfo;
655 if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && (opInfo = operatorLookup( variableExpr->get_var()->get_name() )) && opInfo->type == OT_CONSTANT ) {
656 output << opInfo->symbol;
[51587aa]657 } else {
[6c4ff37]658 output << mangleName( variableExpr->get_var() );
[51587aa]659 } // if
660 }
[71f4e4f]661
[9857e8d]662 void CodeGenerator::postvisit( ConstantExpr * constantExpr ) {
[51587aa]663 assert( constantExpr->get_constant() );
[e04ef3a]664 extension( constantExpr );
[9857e8d]665 constantExpr->get_constant()->accept( *visitor );
[51587aa]666 }
[71f4e4f]667
[9857e8d]668 void CodeGenerator::postvisit( SizeofExpr * sizeofExpr ) {
[e04ef3a]669 extension( sizeofExpr );
[6c4ff37]670 output << "sizeof(";
[51587aa]671 if ( sizeofExpr->get_isType() ) {
[42a36d9]672 output << genType( sizeofExpr->get_type(), "", options );
[51587aa]673 } else {
[9857e8d]674 sizeofExpr->get_expr()->accept( *visitor );
[51587aa]675 } // if
[6c4ff37]676 output << ")";
[51587aa]677 }
[47534159]678
[9857e8d]679 void CodeGenerator::postvisit( AlignofExpr * alignofExpr ) {
[47534159]680 // use GCC extension to avoid bumping std to C11
[8e9cbb2]681 extension( alignofExpr );
[47534159]682 output << "__alignof__(";
[25a054f]683 if ( alignofExpr->get_isType() ) {
[42a36d9]684 output << genType( alignofExpr->get_type(), "", options );
[47534159]685 } else {
[9857e8d]686 alignofExpr->get_expr()->accept( *visitor );
[47534159]687 } // if
688 output << ")";
689 }
[71f4e4f]690
[9857e8d]691 void CodeGenerator::postvisit( UntypedOffsetofExpr * offsetofExpr ) {
[42a36d9]692 assertf( ! options.genC, "UntypedOffsetofExpr should not reach code generation." );
[e39241b]693 output << "offsetof(";
[42a36d9]694 output << genType( offsetofExpr->get_type(), "", options );
[e39241b]695 output << ", " << offsetofExpr->get_member();
696 output << ")";
[2a4b088]697 }
698
[9857e8d]699 void CodeGenerator::postvisit( OffsetofExpr * offsetofExpr ) {
[25a054f]700 // use GCC builtin
701 output << "__builtin_offsetof(";
[42a36d9]702 output << genType( offsetofExpr->get_type(), "", options );
[e551c69]703 output << ", " << mangleName( offsetofExpr->get_member() );
[25a054f]704 output << ")";
705 }
[d63eeb0]706
[9857e8d]707 void CodeGenerator::postvisit( OffsetPackExpr * offsetPackExpr ) {
[42a36d9]708 assertf( ! options.genC, "OffsetPackExpr should not reach code generation." );
709 output << "__CFA_offsetpack(" << genType( offsetPackExpr->get_type(), "", options ) << ")";
[afc1045]710 }
[70a06f6]711
[9857e8d]712 void CodeGenerator::postvisit( LogicalExpr * logicalExpr ) {
[e04ef3a]713 extension( logicalExpr );
[6c4ff37]714 output << "(";
[9857e8d]715 logicalExpr->get_arg1()->accept( *visitor );
[51587aa]716 if ( logicalExpr->get_isAnd() ) {
[6c4ff37]717 output << " && ";
[51587aa]718 } else {
[6c4ff37]719 output << " || ";
[51587aa]720 } // if
[9857e8d]721 logicalExpr->get_arg2()->accept( *visitor );
[6c4ff37]722 output << ")";
[51587aa]723 }
[71f4e4f]724
[9857e8d]725 void CodeGenerator::postvisit( ConditionalExpr * conditionalExpr ) {
[e04ef3a]726 extension( conditionalExpr );
[6c4ff37]727 output << "(";
[9857e8d]728 conditionalExpr->get_arg1()->accept( *visitor );
[6c4ff37]729 output << " ? ";
[9857e8d]730 conditionalExpr->get_arg2()->accept( *visitor );
[6c4ff37]731 output << " : ";
[9857e8d]732 conditionalExpr->get_arg3()->accept( *visitor );
[6c4ff37]733 output << ")";
[51587aa]734 }
[71f4e4f]735
[9857e8d]736 void CodeGenerator::postvisit( CommaExpr * commaExpr ) {
[e04ef3a]737 extension( commaExpr );
[6c4ff37]738 output << "(";
[42a36d9]739 if ( options.genC ) {
[8a6cf7e]740 // arg1 of a CommaExpr is never used, so it can be safely cast to void to reduce gcc warnings.
741 commaExpr->set_arg1( new CastExpr( commaExpr->get_arg1() ) );
742 }
[9857e8d]743 commaExpr->get_arg1()->accept( *visitor );
[6c4ff37]744 output << " , ";
[9857e8d]745 commaExpr->get_arg2()->accept( *visitor );
[6c4ff37]746 output << ")";
[51587aa]747 }
[71f4e4f]748
[9857e8d]749 void CodeGenerator::postvisit( TupleAssignExpr * tupleExpr ) {
[42a36d9]750 assertf( ! options.genC, "TupleAssignExpr should not reach code generation." );
[9857e8d]751 tupleExpr->stmtExpr->accept( *visitor );
[d104b02]752 }
753
[9857e8d]754 void CodeGenerator::postvisit( UntypedTupleExpr * tupleExpr ) {
[42a36d9]755 assertf( ! options.genC, "UntypedTupleExpr should not reach code generation." );
[f975c65]756 extension( tupleExpr );
[e39241b]757 output << "[";
758 genCommaList( tupleExpr->get_exprs().begin(), tupleExpr->get_exprs().end() );
759 output << "]";
760 }
[907eccb]761
[9857e8d]762 void CodeGenerator::postvisit( TupleExpr * tupleExpr ) {
[42a36d9]763 assertf( ! options.genC, "TupleExpr should not reach code generation." );
[f975c65]764 extension( tupleExpr );
[e39241b]765 output << "[";
766 genCommaList( tupleExpr->get_exprs().begin(), tupleExpr->get_exprs().end() );
767 output << "]";
768 }
[71f4e4f]769
[9857e8d]770 void CodeGenerator::postvisit( TupleIndexExpr * tupleExpr ) {
[42a36d9]771 assertf( ! options.genC, "TupleIndexExpr should not reach code generation." );
[f975c65]772 extension( tupleExpr );
[9857e8d]773 tupleExpr->get_tuple()->accept( *visitor );
[f975c65]774 output << "." << tupleExpr->get_index();
775 }
776
[9857e8d]777 void CodeGenerator::postvisit( TypeExpr * typeExpr ) {
[42a36d9]778 // if ( options.genC ) std::cerr << "typeexpr still exists: " << typeExpr << std::endl;
779 // assertf( ! options.genC, "TypeExpr should not reach code generation." );
780 if ( ! options.genC ) {
781 output << genType( typeExpr->get_type(), "", options );
[e4d829b]782 }
[e39241b]783 }
[2b6c1e0]784
[9857e8d]785 void CodeGenerator::postvisit( AsmExpr * asmExpr ) {
[665f432]786 if ( !asmExpr->inout.empty() ) {
[7f5566b]787 output << "[ ";
[665f432]788 output << asmExpr->inout;
[7f5566b]789 output << " ] ";
790 } // if
[665f432]791 asmExpr->constraint->accept( *visitor );
[7f5566b]792 output << " ( ";
[665f432]793 asmExpr->operand->accept( *visitor );
[7f5566b]794 output << " )";
795 }
796
[9857e8d]797 void CodeGenerator::postvisit( CompoundLiteralExpr *compLitExpr ) {
[fbcde64]798 assert( compLitExpr->get_result() && dynamic_cast< ListInit * > ( compLitExpr->get_initializer() ) );
[42a36d9]799 output << "(" << genType( compLitExpr->get_result(), "", options ) << ")";
[9857e8d]800 compLitExpr->get_initializer()->accept( *visitor );
[3c13c03]801 }
802
[9857e8d]803 void CodeGenerator::postvisit( UniqueExpr * unqExpr ) {
[42a36d9]804 assertf( ! options.genC, "Unique expressions should not reach code generation." );
[d104b02]805 output << "unq<" << unqExpr->get_id() << ">{ ";
[9857e8d]806 unqExpr->get_expr()->accept( *visitor );
[d104b02]807 output << " }";
808 }
809
[9857e8d]810 void CodeGenerator::postvisit( StmtExpr * stmtExpr ) {
[44b4114]811 std::list< Statement * > & stmts = stmtExpr->statements->kids;
[d22e90f]812 output << "({" << endl;
[f7cb0bc]813 ++indent;
[3c13c03]814 unsigned int numStmts = stmts.size();
815 unsigned int i = 0;
816 for ( Statement * stmt : stmts ) {
[058f549]817 output << indent << printLabels( stmt->get_labels() );
[3c13c03]818 if ( i+1 == numStmts ) {
819 // last statement in a statement expression needs to be handled specially -
820 // cannot cast to void, otherwise the expression statement has no value
821 if ( ExprStmt * exprStmt = dynamic_cast< ExprStmt * >( stmt ) ) {
[44b4114]822 exprStmt->expr->accept( *visitor );
[3c13c03]823 output << ";" << endl;
824 ++i;
825 break;
826 }
827 }
[9857e8d]828 stmt->accept( *visitor );
[3c13c03]829 output << endl;
830 if ( wantSpacing( stmt ) ) {
831 output << endl;
832 } // if
833 ++i;
834 }
[f7cb0bc]835 --indent;
[3c13c03]836 output << indent << "})";
[6eb8948]837 }
838
[4e8949f]839 void CodeGenerator::postvisit( ConstructorExpr * expr ) {
[42a36d9]840 assertf( ! options.genC, "Unique expressions should not reach code generation." );
[4e8949f]841 expr->callExpr->accept( *visitor );
842 }
843
[44b4114]844 void CodeGenerator::postvisit( DeletedExpr * expr ) {
[42a36d9]845 assertf( ! options.genC, "Deleted expressions should not reach code generation." );
[44b4114]846 expr->expr->accept( *visitor );
847 }
848
[0f79853]849 void CodeGenerator::postvisit( DefaultArgExpr * arg ) {
[42a36d9]850 assertf( ! options.genC, "Default argument expressions should not reach code generation." );
[0f79853]851 arg->expr->accept( *visitor );
852 }
853
[d807ca28]854 void CodeGenerator::postvisit( GenericExpr * expr ) {
[42a36d9]855 assertf( ! options.genC, "C11 _Generic expressions should not reach code generation." );
[d807ca28]856 output << "_Generic(";
857 expr->control->accept( *visitor );
858 output << ", ";
859 unsigned int numAssocs = expr->associations.size();
860 unsigned int i = 0;
861 for ( GenericExpr::Association & assoc : expr->associations ) {
862 if (assoc.isDefault) {
863 output << "default: ";
864 } else {
[42a36d9]865 output << genType( assoc.type, "", options ) << ": ";
[d807ca28]866 }
867 assoc.expr->accept( *visitor );
868 if ( i+1 != numAssocs ) {
869 output << ", ";
870 }
871 i++;
872 }
873 output << ")";
874 }
875
876
[4810867]877 // *** Statements
[9857e8d]878 void CodeGenerator::postvisit( CompoundStmt * compoundStmt ) {
[51587aa]879 std::list<Statement*> ks = compoundStmt->get_kids();
[2b6c1e0]880 output << "{" << endl;
[51587aa]881
[f7cb0bc]882 ++indent;
[51587aa]883
[7f5566b]884 for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) {
[cda48b6]885 output << indent << printLabels( (*i)->get_labels() );
[9857e8d]886 (*i)->accept( *visitor );
[2b6c1e0]887
[6c4ff37]888 output << endl;
[2b6c1e0]889 if ( wantSpacing( *i ) ) {
890 output << endl;
[3778cb2]891 } // if
[8688ce1]892 } // for
[f7cb0bc]893 --indent;
[51587aa]894
[cda48b6]895 output << indent << "}";
[51587aa]896 }
897
[9857e8d]898 void CodeGenerator::postvisit( ExprStmt * exprStmt ) {
[6c4ff37]899 assert( exprStmt );
[42a36d9]900 if ( options.genC ) {
[262f085f]901 // cast the top-level expression to void to reduce gcc warnings.
[8a6cf7e]902 exprStmt->set_expr( new CastExpr( exprStmt->get_expr() ) );
[262f085f]903 }
[9857e8d]904 exprStmt->get_expr()->accept( *visitor );
[321a2481]905 output << ";";
[51587aa]906 }
907
[9857e8d]908 void CodeGenerator::postvisit( AsmStmt * asmStmt ) {
[7f5566b]909 output << "asm ";
910 if ( asmStmt->get_voltile() ) output << "volatile ";
911 if ( ! asmStmt->get_gotolabels().empty() ) output << "goto ";
912 output << "( ";
[9857e8d]913 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *visitor );
[7f5566b]914 output << " : ";
915 genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() );
916 output << " : ";
917 genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() );
918 output << " : ";
919 genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() );
920 if ( ! asmStmt->get_gotolabels().empty() ) {
921 output << " : ";
922 for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) {
923 output << *begin++;
924 if ( begin == asmStmt->get_gotolabels().end() ) break;
925 output << ", ";
926 } // for
927 } // if
[d7312ac]928 output << " );";
[7f5566b]929 }
930
[9857e8d]931 void CodeGenerator::postvisit( AsmDecl * asmDecl ) {
[e994912]932 output << "asm ";
933 AsmStmt * asmStmt = asmDecl->get_stmt();
934 output << "( ";
[9857e8d]935 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *visitor );
[d7312ac]936 output << " )";
[e994912]937 }
938
[cc32d83]939 void CodeGenerator::postvisit( DirectiveStmt * dirStmt ) {
[d7312ac]940 output << endl << dirStmt->directive; // endl prevents spaces before directive
[cc32d83]941 }
942
[9857e8d]943 void CodeGenerator::postvisit( IfStmt * ifStmt ) {
[7f5566b]944 output << "if ( ";
[9857e8d]945 ifStmt->get_condition()->accept( *visitor );
[7f5566b]946 output << " ) ";
[51587aa]947
[9857e8d]948 ifStmt->get_thenPart()->accept( *visitor );
[51587aa]949
950 if ( ifStmt->get_elsePart() != 0) {
[2b6c1e0]951 output << " else ";
[9857e8d]952 ifStmt->get_elsePart()->accept( *visitor );
[51587aa]953 } // if
954 }
955
[9857e8d]956 void CodeGenerator::postvisit( SwitchStmt * switchStmt ) {
[d7312ac]957 output << "switch ( ";
[9857e8d]958 switchStmt->get_condition()->accept( *visitor );
[7f5566b]959 output << " ) ";
[71f4e4f]960
[d22e90f]961 output << "{" << endl;
[f7cb0bc]962 ++indent;
[9857e8d]963 acceptAll( switchStmt->get_statements(), *visitor );
[f7cb0bc]964 --indent;
[cda48b6]965 output << indent << "}";
[51587aa]966 }
967
[9857e8d]968 void CodeGenerator::postvisit( CaseStmt * caseStmt ) {
[8bafacc]969 updateLocation( caseStmt );
[1dcd9554]970 output << indent;
[eb3261f]971 if ( caseStmt->isDefault()) {
[2b6c1e0]972 output << "default";
[eb3261f]973 } else {
[2b6c1e0]974 output << "case ";
[9857e8d]975 caseStmt->get_condition()->accept( *visitor );
[17cd4eb]976 } // if
[d22e90f]977 output << ":" << endl;
[71f4e4f]978
[51587aa]979 std::list<Statement *> sts = caseStmt->get_statements();
980
[f7cb0bc]981 ++indent;
[51587aa]982 for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) {
[d7312ac]983 output << indent << printLabels( (*i)->get_labels() ) ;
[9857e8d]984 (*i)->accept( *visitor );
[6c4ff37]985 output << endl;
[3778cb2]986 } // for
[f7cb0bc]987 --indent;
[51587aa]988 }
989
[9857e8d]990 void CodeGenerator::postvisit( BranchStmt * branchStmt ) {
[51587aa]991 switch ( branchStmt->get_type()) {
992 case BranchStmt::Goto:
993 if ( ! branchStmt->get_target().empty() )
[6c4ff37]994 output << "goto " << branchStmt->get_target();
[71f4e4f]995 else {
[51587aa]996 if ( branchStmt->get_computedTarget() != 0 ) {
[6c4ff37]997 output << "goto *";
[9857e8d]998 branchStmt->get_computedTarget()->accept( *visitor );
[51587aa]999 } // if
1000 } // if
1001 break;
1002 case BranchStmt::Break:
[6c4ff37]1003 output << "break";
[51587aa]1004 break;
1005 case BranchStmt::Continue:
[6c4ff37]1006 output << "continue";
[51587aa]1007 break;
[7c2a7b6]1008 case BranchStmt::FallThrough:
1009 case BranchStmt::FallThroughDefault:
[42a36d9]1010 assertf( ! options.genC, "fallthru should not reach code generation." );
[60a8062]1011 output << "fallthru";
[7c2a7b6]1012 break;
[3778cb2]1013 } // switch
[7c2a7b6]1014 // print branch target for labelled break/continue/fallthru in debug mode
[42a36d9]1015 if ( ! options.genC && branchStmt->get_type() != BranchStmt::Goto ) {
[7c2a7b6]1016 if ( ! branchStmt->get_target().empty() ) {
1017 output << " " << branchStmt->get_target();
1018 } else if ( branchStmt->get_type() == BranchStmt::FallThrough ) {
1019 output << " default";
1020 }
1021 }
[2b6c1e0]1022 output << ";";
[51587aa]1023 }
1024
[9857e8d]1025 void CodeGenerator::postvisit( ReturnStmt * returnStmt ) {
[6c4ff37]1026 output << "return ";
[9857e8d]1027 maybeAccept( returnStmt->get_expr(), *visitor );
[6c4ff37]1028 output << ";";
[51587aa]1029 }
1030
[9857e8d]1031 void CodeGenerator::postvisit( ThrowStmt * throwStmt ) {
[42a36d9]1032 assertf( ! options.genC, "Throw statements should not reach code generation." );
[daf1af8]1033
1034 output << ((throwStmt->get_kind() == ThrowStmt::Terminate) ?
[60a8062]1035 "throw" : "throwResume");
[daf1af8]1036 if (throwStmt->get_expr()) {
1037 output << " ";
[9857e8d]1038 throwStmt->get_expr()->accept( *visitor );
[daf1af8]1039 }
1040 if (throwStmt->get_target()) {
1041 output << " _At ";
[9857e8d]1042 throwStmt->get_target()->accept( *visitor );
[daf1af8]1043 }
1044 output << ";";
1045 }
[e4ea10b7]1046 void CodeGenerator::postvisit( CatchStmt * stmt ) {
[42a36d9]1047 assertf( ! options.genC, "Catch statements should not reach code generation." );
[e4ea10b7]1048
1049 output << ((stmt->get_kind() == CatchStmt::Terminate) ?
[60a8062]1050 "catch" : "catchResume");
[e4ea10b7]1051 output << "( ";
1052 stmt->decl->accept( *visitor );
1053 output << " ) ";
1054
1055 if( stmt->cond ) {
1056 output << "if/when(?) (";
1057 stmt->cond->accept( *visitor );
1058 output << ") ";
1059 }
1060 stmt->body->accept( *visitor );
1061 }
1062
1063 void CodeGenerator::postvisit( WaitForStmt * stmt ) {
[42a36d9]1064 assertf( ! options.genC, "Waitfor statements should not reach code generation." );
[e4ea10b7]1065
1066 bool first = true;
1067 for( auto & clause : stmt->clauses ) {
1068 if(first) { output << "or "; first = false; }
1069 if( clause.condition ) {
1070 output << "when(";
1071 stmt->timeout.condition->accept( *visitor );
1072 output << ") ";
1073 }
1074 output << "waitfor(";
1075 clause.target.function->accept( *visitor );
1076 for( Expression * expr : clause.target.arguments ) {
1077 output << ",";
1078 expr->accept( *visitor );
1079 }
1080 output << ") ";
1081 clause.statement->accept( *visitor );
1082 }
1083
1084 if( stmt->timeout.statement ) {
1085 output << "or ";
1086 if( stmt->timeout.condition ) {
1087 output << "when(";
1088 stmt->timeout.condition->accept( *visitor );
1089 output << ") ";
1090 }
1091 output << "timeout(";
1092 stmt->timeout.time->accept( *visitor );
1093 output << ") ";
1094 stmt->timeout.statement->accept( *visitor );
1095 }
1096
1097 if( stmt->orelse.statement ) {
1098 output << "or ";
1099 if( stmt->orelse.condition ) {
1100 output << "when(";
1101 stmt->orelse.condition->accept( *visitor );
1102 output << ")";
1103 }
1104 output << "else ";
1105 stmt->orelse.statement->accept( *visitor );
1106 }
1107 }
1108
[55d6e8de]1109 void CodeGenerator::postvisit( WithStmt * with ) {
[42a36d9]1110 if ( ! options.genC ) {
[55d6e8de]1111 output << "with ( ";
1112 genCommaList( with->exprs.begin(), with->exprs.end() );
1113 output << " ) ";
1114 }
1115 with->stmt->accept( *visitor );
1116 }
[daf1af8]1117
[9857e8d]1118 void CodeGenerator::postvisit( WhileStmt * whileStmt ) {
[321a2481]1119 if ( whileStmt->get_isDoWhile() ) {
[d7312ac]1120 output << "do";
[321a2481]1121 } else {
[d7312ac]1122 output << "while (";
[9857e8d]1123 whileStmt->get_condition()->accept( *visitor );
[6c4ff37]1124 output << ")";
[51587aa]1125 } // if
[2b6c1e0]1126 output << " ";
[51587aa]1127
[2b6c1e0]1128 output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() );
[9857e8d]1129 whileStmt->get_body()->accept( *visitor );
[51587aa]1130
[cda48b6]1131 output << indent;
[51587aa]1132
1133 if ( whileStmt->get_isDoWhile() ) {
[d7312ac]1134 output << " while (";
[9857e8d]1135 whileStmt->get_condition()->accept( *visitor );
[6c4ff37]1136 output << ");";
[51587aa]1137 } // if
1138 }
1139
[9857e8d]1140 void CodeGenerator::postvisit( ForStmt * forStmt ) {
[8e9cbb2]1141 // initialization is always hoisted, so don't bother doing anything with that
[145f1fc]1142 output << "for (;";
[51587aa]1143
[321a2481]1144 if ( forStmt->get_condition() != 0 ) {
[9857e8d]1145 forStmt->get_condition()->accept( *visitor );
[3778cb2]1146 } // if
[6c4ff37]1147 output << ";";
[51587aa]1148
[321a2481]1149 if ( forStmt->get_increment() != 0 ) {
1150 // cast the top-level expression to void to reduce gcc warnings.
1151 Expression * expr = new CastExpr( forStmt->get_increment() );
[9857e8d]1152 expr->accept( *visitor );
[3778cb2]1153 } // if
[2b6c1e0]1154 output << ") ";
[51587aa]1155
1156 if ( forStmt->get_body() != 0 ) {
[2b6c1e0]1157 output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() );
[9857e8d]1158 forStmt->get_body()->accept( *visitor );
[51587aa]1159 } // if
1160 }
1161
[9857e8d]1162 void CodeGenerator::postvisit( __attribute__((unused)) NullStmt * nullStmt ) {
[cda48b6]1163 //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() );
[6c4ff37]1164 output << "/* null statement */ ;";
[51587aa]1165 }
1166
[9857e8d]1167 void CodeGenerator::postvisit( DeclStmt * declStmt ) {
1168 declStmt->get_decl()->accept( *visitor );
[71f4e4f]1169
[51587aa]1170 if ( doSemicolon( declStmt->get_decl() ) ) {
[6c4ff37]1171 output << ";";
[51587aa]1172 } // if
1173 }
1174
[9857e8d]1175 void CodeGenerator::postvisit( ImplicitCtorDtorStmt * stmt ) {
[42a36d9]1176 assertf( ! options.genC, "ImplicitCtorDtorStmts should not reach code generation." );
[9857e8d]1177 stmt->callStmt->accept( *visitor );
1178 }
1179
[dd020c0]1180 void CodeGenerator::handleStorageClass( DeclarationWithType * decl ) {
[fb04321]1181 if ( decl->get_storageClasses().any() ) {
[6e8bd43]1182 decl->get_storageClasses().print( output );
[a7c90d4]1183 } // if
[dd020c0]1184 } // CodeGenerator::handleStorageClass
[9facf3b]1185
1186 std::string genName( DeclarationWithType * decl ) {
[60a8062]1187 const OperatorInfo * opInfo = operatorLookup( decl->get_name() );
1188 if ( opInfo ) {
1189 return opInfo->outputName;
[9facf3b]1190 } else {
1191 return decl->get_name();
1192 } // if
1193 }
[51b73452]1194} // namespace CodeGen
[51587aa]1195
[50377a4]1196
1197unsigned Indenter::tabsize = 2;
1198
[e149f77]1199std::ostream & operator<<( std::ostream & out, const BaseSyntaxNode * node ) {
1200 if ( node ) {
1201 node->print( out );
1202 } else {
1203 out << "nullptr";
1204 }
1205 return out;
1206}
1207
[51587aa]1208// Local Variables: //
1209// tab-width: 4 //
1210// mode: c++ //
1211// compile-command: "make install" //
1212// End: //
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