source: src/CodeGen/CodeGenerator.cc@ f408e1a

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 f408e1a was 262f085f, checked in by Rob Schluntz <rschlunt@…>, 8 years ago

add version of CodeGen::generate for a single node for use in gdb
  • Property mode set to 100644
File size: 29.2 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
[8688ce1]11// Last Modified By : Peter A. Buhr
[fbcde64]12// Last Modified On : Thu Mar 30 16:38:01 2017
13// Update Count : 482
[51587aa]14//
15
[51b73452]16#include <algorithm>
17#include <iostream>
18#include <cassert>
19#include <list>
20
[68cd1ce]21#include "Parser/ParseNode.h"
22
[e8032b0]23#include "SynTree/Declaration.h"
[51b73452]24#include "SynTree/Expression.h"
25#include "SynTree/Initializer.h"
[68cd1ce]26#include "SynTree/Statement.h"
[e8032b0]27#include "SynTree/Type.h"
[7baed7d]28#include "SynTree/Attribute.h"
[51b73452]29
[d3b7937]30#include "Common/utility.h"
31#include "Common/UnimplementedError.h"
[51b73452]32
[a61fea9a]33#include "CodeGenerator.h"
[51b73452]34#include "OperatorTable.h"
35#include "GenType.h"
36
[10a7775]37#include "InitTweak/InitTweak.h"
38
[51b73452]39using namespace std;
40
41namespace CodeGen {
[6c4ff37]42 int CodeGenerator::tabsize = 4;
[51587aa]43
[145f1fc]44 // the kinds of statements that would ideally be followed by whitespace
[2b6c1e0]45 bool wantSpacing( Statement * stmt) {
46 return dynamic_cast< IfStmt * >( stmt ) || dynamic_cast< CompoundStmt * >( stmt ) ||
[08061589]47 dynamic_cast< WhileStmt * >( stmt ) || dynamic_cast< ForStmt * >( stmt ) || dynamic_cast< SwitchStmt *>( stmt );
[2b6c1e0]48 }
49
[8688ce1]50 void CodeGenerator::extension( Expression * expr ) {
[8e9cbb2]51 if ( expr->get_extension() ) {
52 output << "__extension__ ";
53 } // if
54 } // extension
55
[8688ce1]56 void CodeGenerator::extension( Declaration * decl ) {
[8e9cbb2]57 if ( decl->get_extension() ) {
58 output << "__extension__ ";
59 } // if
60 } // extension
61
[58dd019]62 void CodeGenerator::asmName( DeclarationWithType * decl ) {
63 if ( ConstantExpr * asmName = decl->get_asmName() ) {
64 output << " asm ( " << asmName->get_constant()->get_value() << " )";
65 } // if
66 } // extension
67
[888cbe4]68 ostream & CodeGenerator::Indenter::operator()( ostream & output ) const {
[cda48b6]69 return output << string( cg.cur_indent, ' ' );
70 }
71
[888cbe4]72 ostream & operator<<( ostream & output, const CodeGenerator::Indenter &indent ) {
[cda48b6]73 return indent( output );
74 }
[51587aa]75
[888cbe4]76 CodeGenerator::LabelPrinter & CodeGenerator::LabelPrinter::operator()( std::list< Label > & l ) {
77 labels = &l;
78 return *this;
79 }
80
[8688ce1]81 ostream & operator<<( ostream & output, CodeGenerator::LabelPrinter & printLabels ) {
[888cbe4]82 std::list< Label > & labs = *printLabels.labels;
83 // l.unique(); // assumes a sorted list. Why not use set? Does order matter?
84 for ( Label & l : labs ) {
85 output << l.get_name() + ": ";
86 printLabels.cg.genAttributes( l.get_attributes() );
[8688ce1]87 } // for
[888cbe4]88 return output;
89 }
90
[e39241b]91 CodeGenerator::CodeGenerator( std::ostream & os, bool pretty, bool genC ) : indent( *this), cur_indent( 0 ), insideFunction( false ), output( os ), printLabels( *this ), pretty( pretty ), genC( genC ) {}
[cda48b6]92
[8688ce1]93 CodeGenerator::CodeGenerator( std::ostream & os, std::string init, int indentation, bool infunp )
[888cbe4]94 : indent( *this), cur_indent( indentation ), insideFunction( infunp ), output( os ), printLabels( *this ) {
[6c4ff37]95 //output << std::string( init );
[51587aa]96 }
97
[8688ce1]98 CodeGenerator::CodeGenerator( std::ostream & os, char * init, int indentation, bool infunp )
[888cbe4]99 : indent( *this ), cur_indent( indentation ), insideFunction( infunp ), output( os ), printLabels( *this ) {
[6c4ff37]100 //output << std::string( init );
[51587aa]101 }
102
[486341f]103 string CodeGenerator::mangleName( DeclarationWithType * decl ) {
[35b1bf4]104 if ( pretty ) return decl->get_name();
[51587aa]105 if ( decl->get_mangleName() != "" ) {
[f326f99]106 // need to incorporate scope level in order to differentiate names for destructors
107 return decl->get_scopedMangleName();
[51587aa]108 } else {
109 return decl->get_name();
110 } // if
111 }
[94b4364]112
[44a81853]113 void CodeGenerator::genAttributes( list< Attribute * > & attributes ) {
114 if ( attributes.empty() ) return;
115 output << "__attribute__ ((";
116 for ( list< Attribute * >::iterator attr( attributes.begin() );; ) {
117 output << (*attr)->get_name();
118 if ( ! (*attr)->get_parameters().empty() ) {
119 output << "(";
120 genCommaList( (*attr)->get_parameters().begin(), (*attr)->get_parameters().end() );
121 output << ")";
122 } // if
123 if ( ++attr == attributes.end() ) break;
124 output << ","; // separator
125 } // for
126 output << ")) ";
127 } // CodeGenerator::genAttributes
[7baed7d]128
129
130 //*** Declarations
[8688ce1]131 void CodeGenerator::visit( FunctionDecl * functionDecl ) {
[8e9cbb2]132 extension( functionDecl );
[7baed7d]133 genAttributes( functionDecl->get_attributes() );
134
[51587aa]135 handleStorageClass( functionDecl );
[6e8bd43]136 functionDecl->get_funcSpec().print( output );
[dd020c0]137
[e39241b]138 output << genType( functionDecl->get_functionType(), mangleName( functionDecl ), pretty, genC );
[51587aa]139
[58dd019]140 asmName( functionDecl );
141
[51587aa]142 // acceptAll( functionDecl->get_oldDecls(), *this );
143 if ( functionDecl->get_statements() ) {
[7f5566b]144 functionDecl->get_statements()->accept( *this );
[51587aa]145 } // if
146 }
147
[8688ce1]148 void CodeGenerator::visit( ObjectDecl * objectDecl ) {
[e39241b]149 if (objectDecl->get_name().empty() && genC ) {
150 // only generate an anonymous name when generating C code, otherwise it clutters the output too much
[d9c8a59]151 static UniqueName name = { "__anonymous_object" };
152 objectDecl->set_name( name.newName() );
153 }
154
[8e9cbb2]155 extension( objectDecl );
[f9cebb5]156 genAttributes( objectDecl->get_attributes() );
157
[51587aa]158 handleStorageClass( objectDecl );
[e39241b]159 output << genType( objectDecl->get_type(), mangleName( objectDecl ), pretty, genC );
[71f4e4f]160
[58dd019]161 asmName( objectDecl );
162
[51587aa]163 if ( objectDecl->get_init() ) {
[6c4ff37]164 output << " = ";
[51587aa]165 objectDecl->get_init()->accept( *this );
166 } // if
[3778cb2]167
[51587aa]168 if ( objectDecl->get_bitfieldWidth() ) {
[6c4ff37]169 output << ":";
[51587aa]170 objectDecl->get_bitfieldWidth()->accept( *this );
171 } // if
172 }
173
[5f642e38]174 void CodeGenerator::handleAggregate( AggregateDecl * aggDecl, const std::string & kind ) {
[c0aa336]175 genAttributes( aggDecl->get_attributes() );
[35b1bf4]176
[e39241b]177 if( ! aggDecl->get_parameters().empty() && ! genC ) {
178 // assertf( ! genC, "Aggregate type parameters should not reach code generation." );
179 output << "forall(";
180 genCommaList( aggDecl->get_parameters().begin(), aggDecl->get_parameters().end() );
181 output << ")" << endl;
182 }
183
[5f642e38]184 output << kind;
[51587aa]185 if ( aggDecl->get_name() != "" )
[6c4ff37]186 output << aggDecl->get_name();
[71f4e4f]187
[2c57025]188 if ( aggDecl->has_body() ) {
189 std::list< Declaration * > & memb = aggDecl->get_members();
[94b4364]190 output << " {" << endl;
[51587aa]191
[71f4e4f]192 cur_indent += CodeGenerator::tabsize;
[3778cb2]193 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++ ) {
[71f4e4f]194 output << indent;
[7f5566b]195 (*i)->accept( *this );
[6c4ff37]196 output << ";" << endl;
[3778cb2]197 } // for
[51587aa]198
[71f4e4f]199 cur_indent -= CodeGenerator::tabsize;
[51587aa]200
[cda48b6]201 output << indent << "}";
[17cd4eb]202 } // if
[51587aa]203 }
[17cd4eb]204
[8688ce1]205 void CodeGenerator::visit( StructDecl * structDecl ) {
[8e9cbb2]206 extension( structDecl );
[5f642e38]207 handleAggregate( structDecl, "struct " );
[51587aa]208 }
[17cd4eb]209
[8688ce1]210 void CodeGenerator::visit( UnionDecl * unionDecl ) {
[8e9cbb2]211 extension( unionDecl );
[5f642e38]212 handleAggregate( unionDecl, "union " );
[51587aa]213 }
[71f4e4f]214
[8688ce1]215 void CodeGenerator::visit( EnumDecl * enumDecl ) {
[8e9cbb2]216 extension( enumDecl );
[6c4ff37]217 output << "enum ";
[c0aa336]218 genAttributes( enumDecl->get_attributes() );
[51587aa]219
[8e9cbb2]220 if ( enumDecl->get_name() != "" )
221 output << enumDecl->get_name();
[71f4e4f]222
[8e9cbb2]223 std::list< Declaration* > &memb = enumDecl->get_members();
[51587aa]224
225 if ( ! memb.empty() ) {
[cda48b6]226 output << " {" << endl;
[51587aa]227
[71f4e4f]228 cur_indent += CodeGenerator::tabsize;
[51587aa]229 for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) {
[8688ce1]230 ObjectDecl * obj = dynamic_cast< ObjectDecl* >( *i );
[51587aa]231 assert( obj );
[71f4e4f]232 output << indent << mangleName( obj );
[51587aa]233 if ( obj->get_init() ) {
[6c4ff37]234 output << " = ";
[7f5566b]235 obj->get_init()->accept( *this );
[51587aa]236 } // if
[6c4ff37]237 output << "," << endl;
[51587aa]238 } // for
239
[71f4e4f]240 cur_indent -= CodeGenerator::tabsize;
[51587aa]241
[cda48b6]242 output << indent << "}";
[51587aa]243 } // if
244 }
[71f4e4f]245
[8688ce1]246 void CodeGenerator::visit( TraitDecl * traitDecl ) {}
[71f4e4f]247
[8688ce1]248 void CodeGenerator::visit( TypedefDecl * typeDecl ) {
[e39241b]249 assertf( ! genC, "Typedefs are removed and substituted in earlier passes." );
250 output << "typedef ";
251 output << genType( typeDecl->get_base(), typeDecl->get_name(), pretty, genC ) << endl;
[51587aa]252 }
[71f4e4f]253
[8688ce1]254 void CodeGenerator::visit( TypeDecl * typeDecl ) {
[e39241b]255 if ( genC ) {
256 // really, we should mutate this into something that isn't a TypeDecl but that requires large-scale changes,
257 // still to be done
258 extension( typeDecl );
259 output << "extern unsigned long " << typeDecl->get_name();
260 if ( typeDecl->get_base() ) {
261 output << " = sizeof( " << genType( typeDecl->get_base(), "", pretty, genC ) << " )";
262 } // if
263 } else {
[bdd0755]264 output << typeDecl->genTypeString() << " " << typeDecl->get_name();
265 if ( typeDecl->get_kind() != TypeDecl::Any && typeDecl->get_sized() ) {
266 output << " | sized(" << typeDecl->get_name() << ")";
267 }
[e39241b]268 if ( ! typeDecl->get_assertions().empty() ) {
269 output << " | { ";
270 genCommaList( typeDecl->get_assertions().begin(), typeDecl->get_assertions().end() );
271 output << " }";
272 }
273 }
[51587aa]274 }
275
[e45215c]276 void CodeGenerator::printDesignators( std::list< Expression * > & designators ) {
277 typedef std::list< Expression * > DesignatorList;
278 if ( designators.size() == 0 ) return;
279 for ( DesignatorList::iterator iter = designators.begin(); iter != designators.end(); ++iter ) {
[8a4da06]280 if ( dynamic_cast< NameExpr * >( *iter ) ) {
[f32c7f4]281 // if expression is a name, then initializing aggregate member
282 output << ".";
283 (*iter)->accept( *this );
284 } else {
285 // if not a simple name, it has to be a constant expression, i.e. an array designator
[e45215c]286 output << "[";
287 (*iter)->accept( *this );
288 output << "]";
[3778cb2]289 } // if
290 } // for
[e45215c]291 output << " = ";
292 }
293
[8688ce1]294 void CodeGenerator::visit( SingleInit * init ) {
[e45215c]295 printDesignators( init->get_designators() );
[51587aa]296 init->get_value()->accept( *this );
297 }
298
[8688ce1]299 void CodeGenerator::visit( ListInit * init ) {
[e45215c]300 printDesignators( init->get_designators() );
[6c4ff37]301 output << "{ ";
[4d2434a]302 if ( init->begin() == init->end() ) {
[8e9cbb2]303 // illegal to leave initializer list empty for scalar initializers, but always legal to have 0
[5b40f30]304 output << "0";
305 } else {
[4d2434a]306 genCommaList( init->begin(), init->end() );
[8688ce1]307 } // if
[6c4ff37]308 output << " }";
[51587aa]309 }
310
[fc638d2]311 void CodeGenerator::visit( ConstructorInit * init ){
[e39241b]312 assertf( ! genC, "ConstructorInit nodes should not reach code generation." );
313 // xxx - generate something reasonable for constructor/destructor pairs
314 output << "<ctorinit>";
[fc638d2]315 }
316
[8688ce1]317 void CodeGenerator::visit( Constant * constant ) {
[6c4ff37]318 output << constant->get_value() ;
[51587aa]319 }
320
321 //*** Expressions
[8688ce1]322 void CodeGenerator::visit( ApplicationExpr * applicationExpr ) {
[e04ef3a]323 extension( applicationExpr );
[8688ce1]324 if ( VariableExpr * varExpr = dynamic_cast< VariableExpr* >( applicationExpr->get_function() ) ) {
[51587aa]325 OperatorInfo opInfo;
326 if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( varExpr->get_var()->get_name(), opInfo ) ) {
327 std::list< Expression* >::iterator arg = applicationExpr->get_args().begin();
328 switch ( opInfo.type ) {
329 case OT_PREFIXASSIGN:
330 case OT_POSTFIXASSIGN:
331 case OT_INFIXASSIGN:
[356189a]332 case OT_CTOR:
[c2ce2350]333 case OT_DTOR:
[51587aa]334 {
335 assert( arg != applicationExpr->get_args().end() );
[8688ce1]336 if ( AddressExpr * addrExpr = dynamic_cast< AddressExpr * >( *arg ) ) {
[356189a]337 // remove & from first assignment/ctor argument
[51587aa]338 *arg = addrExpr->get_arg();
339 } else {
[356189a]340 // no address-of operator, so must be a pointer - add dereference
[066d77a]341 // NOTE: if the assertion starts to trigger, check that the application expr isn't being shared.
342 // Since its arguments are modified here, this assertion most commonly triggers when the application
343 // is visited multiple times.
[8688ce1]344 UntypedExpr * newExpr = new UntypedExpr( new NameExpr( "*?" ) );
[51587aa]345 newExpr->get_args().push_back( *arg );
[906e24d]346 Type * type = InitTweak::getPointerBase( (*arg)->get_result() );
[066d77a]347 assertf( type, "First argument to a derefence must be a pointer. Ensure that expressions are not being shared." );
[906e24d]348 newExpr->set_result( type->clone() );
[51587aa]349 *arg = newExpr;
350 } // if
351 break;
352 }
[71f4e4f]353
[51587aa]354 default:
355 // do nothing
356 ;
[3778cb2]357 } // switch
[71f4e4f]358
[51587aa]359 switch ( opInfo.type ) {
360 case OT_INDEX:
361 assert( applicationExpr->get_args().size() == 2 );
362 (*arg++)->accept( *this );
[6c4ff37]363 output << "[";
[51587aa]364 (*arg)->accept( *this );
[6c4ff37]365 output << "]";
[51587aa]366 break;
[71f4e4f]367
[51587aa]368 case OT_CALL:
[356189a]369 // there are no intrinsic definitions of the function call operator
[51587aa]370 assert( false );
371 break;
[71f4e4f]372
[f1e012b]373 case OT_CTOR:
[c2ce2350]374 case OT_DTOR:
[356189a]375 if ( applicationExpr->get_args().size() == 1 ) {
[8e9cbb2]376 // the expression fed into a single parameter constructor or destructor may contain side
377 // effects, so must still output this expression
[64071c2]378 output << "(";
[356189a]379 (*arg++)->accept( *this );
[64071c2]380 output << ") /* " << opInfo.inputName << " */";
[356189a]381 } else if ( applicationExpr->get_args().size() == 2 ) {
[c2ce2350]382 // intrinsic two parameter constructors are essentially bitwise assignment
[356189a]383 output << "(";
384 (*arg++)->accept( *this );
385 output << opInfo.symbol;
386 (*arg)->accept( *this );
[c2ce2350]387 output << ") /* " << opInfo.inputName << " */";
[356189a]388 } else {
[c2ce2350]389 // no constructors with 0 or more than 2 parameters
[356189a]390 assert( false );
[8688ce1]391 } // if
[356189a]392 break;
[f1e012b]393
[51587aa]394 case OT_PREFIX:
395 case OT_PREFIXASSIGN:
396 assert( applicationExpr->get_args().size() == 1 );
[6c4ff37]397 output << "(";
398 output << opInfo.symbol;
[51587aa]399 (*arg)->accept( *this );
[6c4ff37]400 output << ")";
[51587aa]401 break;
[71f4e4f]402
[51587aa]403 case OT_POSTFIX:
404 case OT_POSTFIXASSIGN:
405 assert( applicationExpr->get_args().size() == 1 );
406 (*arg)->accept( *this );
[6c4ff37]407 output << opInfo.symbol;
[51587aa]408 break;
409
[f1e012b]410
[51587aa]411 case OT_INFIX:
412 case OT_INFIXASSIGN:
413 assert( applicationExpr->get_args().size() == 2 );
[6c4ff37]414 output << "(";
[51587aa]415 (*arg++)->accept( *this );
[6c4ff37]416 output << opInfo.symbol;
[51587aa]417 (*arg)->accept( *this );
[6c4ff37]418 output << ")";
[51587aa]419 break;
[71f4e4f]420
[51587aa]421 case OT_CONSTANT:
[721f17a]422 case OT_LABELADDRESS:
423 // there are no intrinsic definitions of 0/1 or label addresses as functions
[51587aa]424 assert( false );
[3778cb2]425 } // switch
[17cd4eb]426 } else {
[51587aa]427 varExpr->accept( *this );
[6c4ff37]428 output << "(";
[51587aa]429 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]430 output << ")";
[17cd4eb]431 } // if
[51587aa]432 } else {
433 applicationExpr->get_function()->accept( *this );
[6c4ff37]434 output << "(";
[51587aa]435 genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() );
[6c4ff37]436 output << ")";
[51587aa]437 } // if
438 }
[71f4e4f]439
[8688ce1]440 void CodeGenerator::visit( UntypedExpr * untypedExpr ) {
[e04ef3a]441 extension( untypedExpr );
[8688ce1]442 if ( NameExpr * nameExpr = dynamic_cast< NameExpr* >( untypedExpr->get_function() ) ) {
[51587aa]443 OperatorInfo opInfo;
444 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
445 std::list< Expression* >::iterator arg = untypedExpr->get_args().begin();
446 switch ( opInfo.type ) {
447 case OT_INDEX:
448 assert( untypedExpr->get_args().size() == 2 );
449 (*arg++)->accept( *this );
[6c4ff37]450 output << "[";
[51587aa]451 (*arg)->accept( *this );
[6c4ff37]452 output << "]";
[51587aa]453 break;
[71f4e4f]454
[51587aa]455 case OT_CALL:
[f1e012b]456 assert( false );
457
[c2ce2350]458 case OT_CTOR:
459 case OT_DTOR:
460 if ( untypedExpr->get_args().size() == 1 ) {
[8e9cbb2]461 // the expression fed into a single parameter constructor or destructor may contain side
462 // effects, so must still output this expression
[64071c2]463 output << "(";
[c2ce2350]464 (*arg++)->accept( *this );
[64071c2]465 output << ") /* " << opInfo.inputName << " */";
[c2ce2350]466 } else if ( untypedExpr->get_args().size() == 2 ) {
467 // intrinsic two parameter constructors are essentially bitwise assignment
468 output << "(";
469 (*arg++)->accept( *this );
470 output << opInfo.symbol;
471 (*arg)->accept( *this );
472 output << ") /* " << opInfo.inputName << " */";
473 } else {
474 // no constructors with 0 or more than 2 parameters
475 assert( false );
[3778cb2]476 } // if
[51587aa]477 break;
[71f4e4f]478
[51587aa]479 case OT_PREFIX:
480 case OT_PREFIXASSIGN:
[de62360d]481 case OT_LABELADDRESS:
[51587aa]482 assert( untypedExpr->get_args().size() == 1 );
[6c4ff37]483 output << "(";
484 output << opInfo.symbol;
[51587aa]485 (*arg)->accept( *this );
[6c4ff37]486 output << ")";
[51587aa]487 break;
[71f4e4f]488
[51587aa]489 case OT_POSTFIX:
490 case OT_POSTFIXASSIGN:
491 assert( untypedExpr->get_args().size() == 1 );
492 (*arg)->accept( *this );
[6c4ff37]493 output << opInfo.symbol;
[51587aa]494 break;
[71f4e4f]495
[51587aa]496 case OT_INFIX:
497 case OT_INFIXASSIGN:
498 assert( untypedExpr->get_args().size() == 2 );
[6c4ff37]499 output << "(";
[51587aa]500 (*arg++)->accept( *this );
[6c4ff37]501 output << opInfo.symbol;
[51587aa]502 (*arg)->accept( *this );
[6c4ff37]503 output << ")";
[51587aa]504 break;
[71f4e4f]505
[51587aa]506 case OT_CONSTANT:
507 // there are no intrinsic definitions of 0 or 1 as functions
508 assert( false );
[3778cb2]509 } // switch
[51587aa]510 } else {
[8688ce1]511 if ( nameExpr->get_name() == "..." ) { // case V1 ... V2 or case V1~V2
[ac911f4]512 assert( untypedExpr->get_args().size() == 2 );
513 (*untypedExpr->get_args().begin())->accept( *this );
514 output << " ... ";
515 (*--untypedExpr->get_args().end())->accept( *this );
[057b34f]516 } else { // builtin routines
517 nameExpr->accept( *this );
518 output << "(";
519 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
520 output << ")";
[66d12f7]521 } // if
[51587aa]522 } // if
523 } else {
524 untypedExpr->get_function()->accept( *this );
[6c4ff37]525 output << "(";
[51587aa]526 genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() );
[6c4ff37]527 output << ")";
[51587aa]528 } // if
529 }
[71f4e4f]530
[064e3ff]531 void CodeGenerator::visit( RangeExpr * rangeExpr ) {
532 rangeExpr->get_low()->accept( *this );
533 output << " ... ";
534 rangeExpr->get_high()->accept( *this );
535 }
536
[8688ce1]537 void CodeGenerator::visit( NameExpr * nameExpr ) {
[e04ef3a]538 extension( nameExpr );
[51587aa]539 OperatorInfo opInfo;
540 if ( operatorLookup( nameExpr->get_name(), opInfo ) ) {
541 assert( opInfo.type == OT_CONSTANT );
[6c4ff37]542 output << opInfo.symbol;
[51587aa]543 } else {
[6c4ff37]544 output << nameExpr->get_name();
[51587aa]545 } // if
546 }
[71f4e4f]547
[8688ce1]548 void CodeGenerator::visit( AddressExpr * addressExpr ) {
[e04ef3a]549 extension( addressExpr );
[6c4ff37]550 output << "(&";
[51587aa]551 // this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address
[8688ce1]552 if ( VariableExpr * variableExpr = dynamic_cast< VariableExpr* >( addressExpr->get_arg() ) ) {
[6c4ff37]553 output << mangleName( variableExpr->get_var() );
[51587aa]554 } else {
555 addressExpr->get_arg()->accept( *this );
556 } // if
[6c4ff37]557 output << ")";
[51587aa]558 }
559
[8688ce1]560 void CodeGenerator::visit( CastExpr * castExpr ) {
[e04ef3a]561 extension( castExpr );
[803deb1]562 output << "(";
[906e24d]563 if ( castExpr->get_result()->isVoid() ) {
[803deb1]564 output << "(void)" ;
[615a096]565 } else if ( ! castExpr->get_result()->get_lvalue() ) {
[803deb1]566 // at least one result type of cast, but not an lvalue
567 output << "(";
[e39241b]568 output << genType( castExpr->get_result(), "", pretty, genC );
[71f4e4f]569 output << ")";
[803deb1]570 } else {
[8e9cbb2]571 // otherwise, the cast is to an lvalue type, so the cast should be dropped, since the result of a cast is
[803deb1]572 // never an lvalue in C
[3778cb2]573 } // if
[803deb1]574 castExpr->get_arg()->accept( *this );
575 output << ")";
[51587aa]576 }
[71f4e4f]577
[8688ce1]578 void CodeGenerator::visit( UntypedMemberExpr * memberExpr ) {
[e39241b]579 assertf( ! genC, "UntypedMemberExpr should not reach code generation." );
580 extension( memberExpr );
581 memberExpr->get_aggregate()->accept( *this );
[5f642e38]582 output << ".";
583 memberExpr->get_member()->accept( *this );
[51587aa]584 }
[71f4e4f]585
[8688ce1]586 void CodeGenerator::visit( MemberExpr * memberExpr ) {
[e04ef3a]587 extension( memberExpr );
[51587aa]588 memberExpr->get_aggregate()->accept( *this );
[6c4ff37]589 output << "." << mangleName( memberExpr->get_member() );
[51587aa]590 }
[71f4e4f]591
[8688ce1]592 void CodeGenerator::visit( VariableExpr * variableExpr ) {
[e04ef3a]593 extension( variableExpr );
[51587aa]594 OperatorInfo opInfo;
595 if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) {
[6c4ff37]596 output << opInfo.symbol;
[51587aa]597 } else {
[6c4ff37]598 output << mangleName( variableExpr->get_var() );
[51587aa]599 } // if
600 }
[71f4e4f]601
[8688ce1]602 void CodeGenerator::visit( ConstantExpr * constantExpr ) {
[51587aa]603 assert( constantExpr->get_constant() );
[e04ef3a]604 extension( constantExpr );
[51587aa]605 constantExpr->get_constant()->accept( *this );
606 }
[71f4e4f]607
[8688ce1]608 void CodeGenerator::visit( SizeofExpr * sizeofExpr ) {
[e04ef3a]609 extension( sizeofExpr );
[6c4ff37]610 output << "sizeof(";
[51587aa]611 if ( sizeofExpr->get_isType() ) {
[e39241b]612 output << genType( sizeofExpr->get_type(), "", pretty, genC );
[51587aa]613 } else {
614 sizeofExpr->get_expr()->accept( *this );
615 } // if
[6c4ff37]616 output << ")";
[51587aa]617 }
[47534159]618
[8688ce1]619 void CodeGenerator::visit( AlignofExpr * alignofExpr ) {
[47534159]620 // use GCC extension to avoid bumping std to C11
[8e9cbb2]621 extension( alignofExpr );
[47534159]622 output << "__alignof__(";
[25a054f]623 if ( alignofExpr->get_isType() ) {
[e39241b]624 output << genType( alignofExpr->get_type(), "", pretty, genC );
[47534159]625 } else {
[25a054f]626 alignofExpr->get_expr()->accept( *this );
[47534159]627 } // if
628 output << ")";
629 }
[71f4e4f]630
[8688ce1]631 void CodeGenerator::visit( UntypedOffsetofExpr * offsetofExpr ) {
[e39241b]632 assertf( ! genC, "UntypedOffsetofExpr should not reach code generation." );
633 output << "offsetof(";
634 output << genType( offsetofExpr->get_type(), "", pretty, genC );
635 output << ", " << offsetofExpr->get_member();
636 output << ")";
[2a4b088]637 }
638
[8688ce1]639 void CodeGenerator::visit( OffsetofExpr * offsetofExpr ) {
[25a054f]640 // use GCC builtin
641 output << "__builtin_offsetof(";
[e39241b]642 output << genType( offsetofExpr->get_type(), "", pretty, genC );
[e551c69]643 output << ", " << mangleName( offsetofExpr->get_member() );
[25a054f]644 output << ")";
645 }
[d63eeb0]646
[8688ce1]647 void CodeGenerator::visit( OffsetPackExpr * offsetPackExpr ) {
[e39241b]648 assertf( ! genC, "OffsetPackExpr should not reach code generation." );
649 output << "__CFA_offsetpack(" << genType( offsetPackExpr->get_type(), "", pretty, genC ) << ")";
[afc1045]650 }
[70a06f6]651
[8688ce1]652 void CodeGenerator::visit( LogicalExpr * logicalExpr ) {
[e04ef3a]653 extension( logicalExpr );
[6c4ff37]654 output << "(";
[51587aa]655 logicalExpr->get_arg1()->accept( *this );
656 if ( logicalExpr->get_isAnd() ) {
[6c4ff37]657 output << " && ";
[51587aa]658 } else {
[6c4ff37]659 output << " || ";
[51587aa]660 } // if
661 logicalExpr->get_arg2()->accept( *this );
[6c4ff37]662 output << ")";
[51587aa]663 }
[71f4e4f]664
[8688ce1]665 void CodeGenerator::visit( ConditionalExpr * conditionalExpr ) {
[e04ef3a]666 extension( conditionalExpr );
[6c4ff37]667 output << "(";
[51587aa]668 conditionalExpr->get_arg1()->accept( *this );
[6c4ff37]669 output << " ? ";
[51587aa]670 conditionalExpr->get_arg2()->accept( *this );
[6c4ff37]671 output << " : ";
[51587aa]672 conditionalExpr->get_arg3()->accept( *this );
[6c4ff37]673 output << ")";
[51587aa]674 }
[71f4e4f]675
[8688ce1]676 void CodeGenerator::visit( CommaExpr * commaExpr ) {
[e04ef3a]677 extension( commaExpr );
[6c4ff37]678 output << "(";
[51587aa]679 commaExpr->get_arg1()->accept( *this );
[6c4ff37]680 output << " , ";
[51587aa]681 commaExpr->get_arg2()->accept( *this );
[6c4ff37]682 output << ")";
[51587aa]683 }
[71f4e4f]684
[e39241b]685 void CodeGenerator::visit( UntypedTupleExpr * tupleExpr ) {
686 assertf( ! genC, "UntypedTupleExpr should not reach code generation." );
687 output << "[";
688 genCommaList( tupleExpr->get_exprs().begin(), tupleExpr->get_exprs().end() );
689 output << "]";
690 }
[907eccb]691
[e39241b]692 void CodeGenerator::visit( TupleExpr * tupleExpr ) {
693 assertf( ! genC, "TupleExpr should not reach code generation." );
694 output << "[";
695 genCommaList( tupleExpr->get_exprs().begin(), tupleExpr->get_exprs().end() );
696 output << "]";
697 }
[71f4e4f]698
[e39241b]699 void CodeGenerator::visit( TypeExpr * typeExpr ) {
700 assertf( ! genC, "TypeExpr should not reach code generation." );
701 output<< genType( typeExpr->get_type(), "", pretty, genC );
702 }
[2b6c1e0]703
[8688ce1]704 void CodeGenerator::visit( AsmExpr * asmExpr ) {
[7f5566b]705 if ( asmExpr->get_inout() ) {
706 output << "[ ";
707 asmExpr->get_inout()->accept( *this );
708 output << " ] ";
709 } // if
710 asmExpr->get_constraint()->accept( *this );
711 output << " ( ";
712 asmExpr->get_operand()->accept( *this );
713 output << " )";
714 }
715
[3c13c03]716 void CodeGenerator::visit( CompoundLiteralExpr *compLitExpr ) {
[fbcde64]717 assert( compLitExpr->get_result() && dynamic_cast< ListInit * > ( compLitExpr->get_initializer() ) );
[e39241b]718 output << "(" << genType( compLitExpr->get_result(), "", pretty, genC ) << ")";
[3c13c03]719 compLitExpr->get_initializer()->accept( *this );
720 }
721
[6eb8948]722 void CodeGenerator::visit( StmtExpr * stmtExpr ) {
[3c13c03]723 std::list< Statement * > & stmts = stmtExpr->get_statements()->get_kids();
724 output << "({" << std::endl;
725 cur_indent += CodeGenerator::tabsize;
726 unsigned int numStmts = stmts.size();
727 unsigned int i = 0;
728 for ( Statement * stmt : stmts ) {
729 output << indent << printLabels( stmt->get_labels() );
730 if ( i+1 == numStmts ) {
731 // last statement in a statement expression needs to be handled specially -
732 // cannot cast to void, otherwise the expression statement has no value
733 if ( ExprStmt * exprStmt = dynamic_cast< ExprStmt * >( stmt ) ) {
734 exprStmt->get_expr()->accept( *this );
735 output << ";" << endl;
736 ++i;
737 break;
738 }
739 }
740 stmt->accept( *this );
741 output << endl;
742 if ( wantSpacing( stmt ) ) {
743 output << endl;
744 } // if
745 ++i;
746 }
747 cur_indent -= CodeGenerator::tabsize;
748 output << indent << "})";
[6eb8948]749 }
750
[51587aa]751 //*** Statements
[8688ce1]752 void CodeGenerator::visit( CompoundStmt * compoundStmt ) {
[51587aa]753 std::list<Statement*> ks = compoundStmt->get_kids();
[2b6c1e0]754 output << "{" << endl;
[51587aa]755
[2b6c1e0]756 cur_indent += CodeGenerator::tabsize;
[51587aa]757
[7f5566b]758 for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) {
[cda48b6]759 output << indent << printLabels( (*i)->get_labels() );
[7f5566b]760 (*i)->accept( *this );
[2b6c1e0]761
[6c4ff37]762 output << endl;
[2b6c1e0]763 if ( wantSpacing( *i ) ) {
764 output << endl;
[3778cb2]765 } // if
[8688ce1]766 } // for
[71f4e4f]767 cur_indent -= CodeGenerator::tabsize;
[51587aa]768
[cda48b6]769 output << indent << "}";
[51587aa]770 }
771
[8688ce1]772 void CodeGenerator::visit( ExprStmt * exprStmt ) {
[6c4ff37]773 assert( exprStmt );
[262f085f]774 Expression * expr = exprStmt->get_expr();
775 if ( genC ) {
776 // cast the top-level expression to void to reduce gcc warnings.
777 expr = new CastExpr( expr );
778 }
[321a2481]779 expr->accept( *this );
780 output << ";";
[51587aa]781 }
782
[8688ce1]783 void CodeGenerator::visit( AsmStmt * asmStmt ) {
[7f5566b]784 output << "asm ";
785 if ( asmStmt->get_voltile() ) output << "volatile ";
786 if ( ! asmStmt->get_gotolabels().empty() ) output << "goto ";
787 output << "( ";
788 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
789 output << " : ";
790 genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() );
791 output << " : ";
792 genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() );
793 output << " : ";
794 genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() );
795 if ( ! asmStmt->get_gotolabels().empty() ) {
796 output << " : ";
797 for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) {
798 output << *begin++;
799 if ( begin == asmStmt->get_gotolabels().end() ) break;
800 output << ", ";
801 } // for
802 } // if
803 output << " );" ;
804 }
805
[e994912]806 void CodeGenerator::visit( AsmDecl * asmDecl ) {
807 output << "asm ";
808 AsmStmt * asmStmt = asmDecl->get_stmt();
809 output << "( ";
810 if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this );
811 output << " )" ;
812 }
813
[8688ce1]814 void CodeGenerator::visit( IfStmt * ifStmt ) {
[7f5566b]815 output << "if ( ";
816 ifStmt->get_condition()->accept( *this );
817 output << " ) ";
[51587aa]818
[7f5566b]819 ifStmt->get_thenPart()->accept( *this );
[51587aa]820
821 if ( ifStmt->get_elsePart() != 0) {
[2b6c1e0]822 output << " else ";
[7f5566b]823 ifStmt->get_elsePart()->accept( *this );
[51587aa]824 } // if
825 }
826
[8688ce1]827 void CodeGenerator::visit( SwitchStmt * switchStmt ) {
[7f5566b]828 output << "switch ( " ;
829 switchStmt->get_condition()->accept( *this );
830 output << " ) ";
[71f4e4f]831
[2b6c1e0]832 output << "{" << std::endl;
[6c4ff37]833 cur_indent += CodeGenerator::tabsize;
[8688ce1]834 acceptAll( switchStmt->get_statements(), *this );
[6c4ff37]835 cur_indent -= CodeGenerator::tabsize;
[cda48b6]836 output << indent << "}";
[51587aa]837 }
838
[8688ce1]839 void CodeGenerator::visit( CaseStmt * caseStmt ) {
[cda48b6]840 output << indent;
[eb3261f]841 if ( caseStmt->isDefault()) {
[2b6c1e0]842 output << "default";
[eb3261f]843 } else {
[2b6c1e0]844 output << "case ";
[7f5566b]845 caseStmt->get_condition()->accept( *this );
[17cd4eb]846 } // if
[6c4ff37]847 output << ":\n";
[71f4e4f]848
[51587aa]849 std::list<Statement *> sts = caseStmt->get_statements();
850
[6c4ff37]851 cur_indent += CodeGenerator::tabsize;
[51587aa]852 for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) {
[cda48b6]853 output << indent << printLabels( (*i)->get_labels() ) ;
[7f5566b]854 (*i)->accept( *this );
[6c4ff37]855 output << endl;
[3778cb2]856 } // for
[6c4ff37]857 cur_indent -= CodeGenerator::tabsize;
[51587aa]858 }
859
[8688ce1]860 void CodeGenerator::visit( BranchStmt * branchStmt ) {
[51587aa]861 switch ( branchStmt->get_type()) {
862 case BranchStmt::Goto:
863 if ( ! branchStmt->get_target().empty() )
[6c4ff37]864 output << "goto " << branchStmt->get_target();
[71f4e4f]865 else {
[51587aa]866 if ( branchStmt->get_computedTarget() != 0 ) {
[6c4ff37]867 output << "goto *";
[51587aa]868 branchStmt->get_computedTarget()->accept( *this );
869 } // if
870 } // if
871 break;
872 case BranchStmt::Break:
[6c4ff37]873 output << "break";
[51587aa]874 break;
875 case BranchStmt::Continue:
[6c4ff37]876 output << "continue";
[51587aa]877 break;
[3778cb2]878 } // switch
[2b6c1e0]879 output << ";";
[51587aa]880 }
881
[8688ce1]882 void CodeGenerator::visit( ReturnStmt * returnStmt ) {
[6c4ff37]883 output << "return ";
[4b2589a]884 maybeAccept( returnStmt->get_expr(), *this );
[6c4ff37]885 output << ";";
[51587aa]886 }
887
[8688ce1]888 void CodeGenerator::visit( WhileStmt * whileStmt ) {
[321a2481]889 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]890 output << "do" ;
[321a2481]891 } else {
[6c4ff37]892 output << "while (" ;
[7f5566b]893 whileStmt->get_condition()->accept( *this );
[6c4ff37]894 output << ")";
[51587aa]895 } // if
[2b6c1e0]896 output << " ";
[51587aa]897
[2b6c1e0]898 output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() );
[51587aa]899 whileStmt->get_body()->accept( *this );
900
[cda48b6]901 output << indent;
[51587aa]902
903 if ( whileStmt->get_isDoWhile() ) {
[6c4ff37]904 output << " while (" ;
[7f5566b]905 whileStmt->get_condition()->accept( *this );
[6c4ff37]906 output << ");";
[51587aa]907 } // if
908 }
909
[8688ce1]910 void CodeGenerator::visit( ForStmt * forStmt ) {
[8e9cbb2]911 // initialization is always hoisted, so don't bother doing anything with that
[145f1fc]912 output << "for (;";
[51587aa]913
[321a2481]914 if ( forStmt->get_condition() != 0 ) {
[51587aa]915 forStmt->get_condition()->accept( *this );
[3778cb2]916 } // if
[6c4ff37]917 output << ";";
[51587aa]918
[321a2481]919 if ( forStmt->get_increment() != 0 ) {
920 // cast the top-level expression to void to reduce gcc warnings.
921 Expression * expr = new CastExpr( forStmt->get_increment() );
922 expr->accept( *this );
[3778cb2]923 } // if
[2b6c1e0]924 output << ") ";
[51587aa]925
926 if ( forStmt->get_body() != 0 ) {
[2b6c1e0]927 output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() );
[51587aa]928 forStmt->get_body()->accept( *this );
929 } // if
930 }
931
[8688ce1]932 void CodeGenerator::visit( NullStmt * nullStmt ) {
[cda48b6]933 //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() );
[6c4ff37]934 output << "/* null statement */ ;";
[51587aa]935 }
936
[8688ce1]937 void CodeGenerator::visit( DeclStmt * declStmt ) {
[51587aa]938 declStmt->get_decl()->accept( *this );
[71f4e4f]939
[51587aa]940 if ( doSemicolon( declStmt->get_decl() ) ) {
[6c4ff37]941 output << ";";
[51587aa]942 } // if
943 }
944
[dd020c0]945 void CodeGenerator::handleStorageClass( DeclarationWithType * decl ) {
[fb04321]946 if ( decl->get_storageClasses().any() ) {
[6e8bd43]947 decl->get_storageClasses().print( output );
[a7c90d4]948 } // if
[dd020c0]949 } // CodeGenerator::handleStorageClass
[9facf3b]950
951 std::string genName( DeclarationWithType * decl ) {
952 CodeGen::OperatorInfo opInfo;
953 if ( operatorLookup( decl->get_name(), opInfo ) ) {
954 return opInfo.outputName;
955 } else {
956 return decl->get_name();
957 } // if
958 }
[51b73452]959} // namespace CodeGen
[51587aa]960
961// Local Variables: //
962// tab-width: 4 //
963// mode: c++ //
964// compile-command: "make install" //
965// End: //
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