[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 | // |
---|
[6c4ff37] | 7 | // CodeGenerator.cc -- |
---|
[51587aa] | 8 | // |
---|
| 9 | // Author : Richard C. Bilson |
---|
| 10 | // Created On : Mon May 18 07:44:20 2015 |
---|
[d3b7937] | 11 | // Last Modified By : Peter A. Buhr |
---|
[4040425] | 12 | // Last Modified On : Wed Mar 2 17:32:16 2016 |
---|
| 13 | // Update Count : 243 |
---|
[51587aa] | 14 | // |
---|
| 15 | |
---|
[51b7345] | 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" |
---|
[51b7345] | 24 | #include "SynTree/Expression.h" |
---|
| 25 | #include "SynTree/Initializer.h" |
---|
[68cd1ce] | 26 | #include "SynTree/Statement.h" |
---|
[e8032b0] | 27 | #include "SynTree/Type.h" |
---|
[51b7345] | 28 | |
---|
[d3b7937] | 29 | #include "Common/utility.h" |
---|
| 30 | #include "Common/UnimplementedError.h" |
---|
[51b7345] | 31 | |
---|
[a61fea9a] | 32 | #include "CodeGenerator.h" |
---|
[51b7345] | 33 | #include "OperatorTable.h" |
---|
| 34 | #include "GenType.h" |
---|
| 35 | |
---|
| 36 | using namespace std; |
---|
| 37 | |
---|
| 38 | namespace CodeGen { |
---|
[6c4ff37] | 39 | int CodeGenerator::tabsize = 4; |
---|
[51587aa] | 40 | |
---|
[145f1fc] | 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 ) || |
---|
| 44 | dynamic_cast< WhileStmt * >( stmt ) || dynamic_cast< ForStmt * > ( stmt ) || dynamic_cast< SwitchStmt *>( stmt ); |
---|
| 45 | } |
---|
| 46 | |
---|
[cda48b6] | 47 | ostream & CodeGenerator::Indenter::operator()( ostream & output ) { |
---|
| 48 | return output << string( cg.cur_indent, ' ' ); |
---|
| 49 | } |
---|
| 50 | |
---|
| 51 | ostream & operator<<( ostream & output, CodeGenerator::Indenter &indent ) { |
---|
| 52 | return indent( output ); |
---|
| 53 | } |
---|
[51587aa] | 54 | |
---|
[7f5566b] | 55 | CodeGenerator::CodeGenerator( std::ostream &os ) : indent( *this), cur_indent( 0 ), insideFunction( false ), output( os ) { } |
---|
[cda48b6] | 56 | |
---|
| 57 | CodeGenerator::CodeGenerator( std::ostream &os, std::string init, int indentation, bool infunp ) |
---|
[7f5566b] | 58 | : indent( *this), cur_indent( indentation ), insideFunction( infunp ), output( os ) { |
---|
[6c4ff37] | 59 | //output << std::string( init ); |
---|
[51587aa] | 60 | } |
---|
| 61 | |
---|
[cda48b6] | 62 | CodeGenerator::CodeGenerator( std::ostream &os, char *init, int indentation, bool infunp ) |
---|
[7f5566b] | 63 | : indent( *this ), cur_indent( indentation ), insideFunction( infunp ), output( os ) { |
---|
[6c4ff37] | 64 | //output << std::string( init ); |
---|
[51587aa] | 65 | } |
---|
| 66 | |
---|
| 67 | string mangleName( DeclarationWithType *decl ) { |
---|
| 68 | if ( decl->get_mangleName() != "" ) { |
---|
| 69 | return decl->get_mangleName(); |
---|
| 70 | } else { |
---|
| 71 | return decl->get_name(); |
---|
| 72 | } // if |
---|
| 73 | } |
---|
[94b4364] | 74 | |
---|
[51587aa] | 75 | //*** Declarations |
---|
[6c4ff37] | 76 | void CodeGenerator::visit( FunctionDecl *functionDecl ) { |
---|
[51587aa] | 77 | handleStorageClass( functionDecl ); |
---|
[f38c8d9] | 78 | if ( functionDecl->get_isInline() ) { |
---|
[6c4ff37] | 79 | output << "inline "; |
---|
[f38c8d9] | 80 | } // if |
---|
[de62360d] | 81 | if ( functionDecl->get_isNoreturn() ) { |
---|
| 82 | output << "_Noreturn "; |
---|
| 83 | } // if |
---|
[6c4ff37] | 84 | output << genType( functionDecl->get_functionType(), mangleName( functionDecl ) ); |
---|
[51587aa] | 85 | |
---|
| 86 | // how to get this to the Functype? |
---|
| 87 | std::list< Declaration * > olds = functionDecl->get_oldDecls(); |
---|
| 88 | if ( ! olds.empty() ) { |
---|
[6c4ff37] | 89 | output << " /* function has old declaration */"; |
---|
[51587aa] | 90 | } // if |
---|
| 91 | |
---|
| 92 | // acceptAll( functionDecl->get_oldDecls(), *this ); |
---|
| 93 | if ( functionDecl->get_statements() ) { |
---|
[7f5566b] | 94 | functionDecl->get_statements()->accept( *this ); |
---|
[51587aa] | 95 | } // if |
---|
| 96 | } |
---|
| 97 | |
---|
[6c4ff37] | 98 | void CodeGenerator::visit( ObjectDecl *objectDecl ) { |
---|
[51587aa] | 99 | handleStorageClass( objectDecl ); |
---|
[6c4ff37] | 100 | output << genType( objectDecl->get_type(), mangleName( objectDecl ) ); |
---|
[51587aa] | 101 | |
---|
| 102 | if ( objectDecl->get_init() ) { |
---|
[6c4ff37] | 103 | output << " = "; |
---|
[51587aa] | 104 | objectDecl->get_init()->accept( *this ); |
---|
| 105 | } // if |
---|
| 106 | if ( objectDecl->get_bitfieldWidth() ) { |
---|
[6c4ff37] | 107 | output << ":"; |
---|
[51587aa] | 108 | objectDecl->get_bitfieldWidth()->accept( *this ); |
---|
| 109 | } // if |
---|
| 110 | } |
---|
| 111 | |
---|
[6c4ff37] | 112 | void CodeGenerator::handleAggregate( AggregateDecl *aggDecl ) { |
---|
[51587aa] | 113 | if ( aggDecl->get_name() != "" ) |
---|
[6c4ff37] | 114 | output << aggDecl->get_name(); |
---|
[51587aa] | 115 | |
---|
| 116 | std::list< Declaration * > &memb = aggDecl->get_members(); |
---|
| 117 | |
---|
| 118 | if ( ! memb.empty() ) { |
---|
[94b4364] | 119 | output << " {" << endl; |
---|
[51587aa] | 120 | |
---|
[6c4ff37] | 121 | cur_indent += CodeGenerator::tabsize; |
---|
[51587aa] | 122 | for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) { |
---|
[cda48b6] | 123 | output << indent; |
---|
[7f5566b] | 124 | (*i)->accept( *this ); |
---|
[6c4ff37] | 125 | output << ";" << endl; |
---|
[51587aa] | 126 | } |
---|
| 127 | |
---|
[6c4ff37] | 128 | cur_indent -= CodeGenerator::tabsize; |
---|
[51587aa] | 129 | |
---|
[cda48b6] | 130 | output << indent << "}"; |
---|
[17cd4eb] | 131 | } // if |
---|
[51587aa] | 132 | } |
---|
[17cd4eb] | 133 | |
---|
[6c4ff37] | 134 | void CodeGenerator::visit( StructDecl *structDecl ) { |
---|
| 135 | output << "struct "; |
---|
[51587aa] | 136 | handleAggregate( structDecl ); |
---|
| 137 | } |
---|
[17cd4eb] | 138 | |
---|
[6c4ff37] | 139 | void CodeGenerator::visit( UnionDecl *aggregateDecl ) { |
---|
| 140 | output << "union "; |
---|
[51587aa] | 141 | handleAggregate( aggregateDecl ); |
---|
| 142 | } |
---|
[51b7345] | 143 | |
---|
[6c4ff37] | 144 | void CodeGenerator::visit( EnumDecl *aggDecl ) { |
---|
| 145 | output << "enum "; |
---|
[51587aa] | 146 | |
---|
| 147 | if ( aggDecl->get_name() != "" ) |
---|
[6c4ff37] | 148 | output << aggDecl->get_name(); |
---|
[51587aa] | 149 | |
---|
| 150 | std::list< Declaration* > &memb = aggDecl->get_members(); |
---|
| 151 | |
---|
| 152 | if ( ! memb.empty() ) { |
---|
[cda48b6] | 153 | output << " {" << endl; |
---|
[51587aa] | 154 | |
---|
[6c4ff37] | 155 | cur_indent += CodeGenerator::tabsize; |
---|
[51587aa] | 156 | for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) { |
---|
| 157 | ObjectDecl *obj = dynamic_cast< ObjectDecl* >( *i ); |
---|
| 158 | assert( obj ); |
---|
[cda48b6] | 159 | output << indent << mangleName( obj ); |
---|
[51587aa] | 160 | if ( obj->get_init() ) { |
---|
[6c4ff37] | 161 | output << " = "; |
---|
[7f5566b] | 162 | obj->get_init()->accept( *this ); |
---|
[51587aa] | 163 | } // if |
---|
[6c4ff37] | 164 | output << "," << endl; |
---|
[51587aa] | 165 | } // for |
---|
| 166 | |
---|
[6c4ff37] | 167 | cur_indent -= CodeGenerator::tabsize; |
---|
[51587aa] | 168 | |
---|
[cda48b6] | 169 | output << indent << "}"; |
---|
[51587aa] | 170 | } // if |
---|
| 171 | } |
---|
[51b7345] | 172 | |
---|
[4040425] | 173 | void CodeGenerator::visit( TraitDecl *aggregateDecl ) {} |
---|
[51587aa] | 174 | |
---|
[6c4ff37] | 175 | void CodeGenerator::visit( TypedefDecl *typeDecl ) { |
---|
| 176 | output << "typedef "; |
---|
| 177 | output << genType( typeDecl->get_base(), typeDecl->get_name() ); |
---|
[51587aa] | 178 | } |
---|
[51b7345] | 179 | |
---|
[6c4ff37] | 180 | void CodeGenerator::visit( TypeDecl *typeDecl ) { |
---|
[51587aa] | 181 | // really, we should mutate this into something that isn't a TypeDecl but that requires large-scale changes, |
---|
| 182 | // still to be done |
---|
[6c4ff37] | 183 | output << "extern unsigned long " << typeDecl->get_name(); |
---|
[51587aa] | 184 | if ( typeDecl->get_base() ) { |
---|
[6c4ff37] | 185 | output << " = sizeof( " << genType( typeDecl->get_base(), "" ) << " )"; |
---|
[51587aa] | 186 | } // if |
---|
| 187 | } |
---|
| 188 | |
---|
[e45215c] | 189 | void CodeGenerator::printDesignators( std::list< Expression * > & designators ) { |
---|
| 190 | typedef std::list< Expression * > DesignatorList; |
---|
| 191 | if ( designators.size() == 0 ) return; |
---|
| 192 | for ( DesignatorList::iterator iter = designators.begin(); iter != designators.end(); ++iter ) { |
---|
[8a4da06] | 193 | if ( dynamic_cast< NameExpr * >( *iter ) ) { |
---|
[f32c7f4] | 194 | // if expression is a name, then initializing aggregate member |
---|
| 195 | output << "."; |
---|
| 196 | (*iter)->accept( *this ); |
---|
| 197 | } else { |
---|
| 198 | // if not a simple name, it has to be a constant expression, i.e. an array designator |
---|
[e45215c] | 199 | output << "["; |
---|
| 200 | (*iter)->accept( *this ); |
---|
| 201 | output << "]"; |
---|
| 202 | } |
---|
| 203 | } |
---|
| 204 | output << " = "; |
---|
| 205 | } |
---|
| 206 | |
---|
[6c4ff37] | 207 | void CodeGenerator::visit( SingleInit *init ) { |
---|
[e45215c] | 208 | printDesignators( init->get_designators() ); |
---|
[51587aa] | 209 | init->get_value()->accept( *this ); |
---|
| 210 | } |
---|
| 211 | |
---|
[6c4ff37] | 212 | void CodeGenerator::visit( ListInit *init ) { |
---|
[e45215c] | 213 | printDesignators( init->get_designators() ); |
---|
[6c4ff37] | 214 | output << "{ "; |
---|
[51587aa] | 215 | genCommaList( init->begin_initializers(), init->end_initializers() ); |
---|
[6c4ff37] | 216 | output << " }"; |
---|
[51587aa] | 217 | } |
---|
| 218 | |
---|
[6c4ff37] | 219 | void CodeGenerator::visit( Constant *constant ) { |
---|
| 220 | output << constant->get_value() ; |
---|
[51587aa] | 221 | } |
---|
| 222 | |
---|
| 223 | //*** Expressions |
---|
[6c4ff37] | 224 | void CodeGenerator::visit( ApplicationExpr *applicationExpr ) { |
---|
[51587aa] | 225 | if ( VariableExpr *varExpr = dynamic_cast< VariableExpr* >( applicationExpr->get_function() ) ) { |
---|
| 226 | OperatorInfo opInfo; |
---|
| 227 | if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( varExpr->get_var()->get_name(), opInfo ) ) { |
---|
| 228 | std::list< Expression* >::iterator arg = applicationExpr->get_args().begin(); |
---|
| 229 | switch ( opInfo.type ) { |
---|
| 230 | case OT_PREFIXASSIGN: |
---|
| 231 | case OT_POSTFIXASSIGN: |
---|
| 232 | case OT_INFIXASSIGN: |
---|
| 233 | { |
---|
| 234 | assert( arg != applicationExpr->get_args().end() ); |
---|
| 235 | if ( AddressExpr *addrExpr = dynamic_cast< AddressExpr * >( *arg ) ) { |
---|
| 236 | |
---|
| 237 | *arg = addrExpr->get_arg(); |
---|
| 238 | } else { |
---|
| 239 | UntypedExpr *newExpr = new UntypedExpr( new NameExpr( "*?" ) ); |
---|
| 240 | newExpr->get_args().push_back( *arg ); |
---|
| 241 | *arg = newExpr; |
---|
| 242 | } // if |
---|
| 243 | break; |
---|
| 244 | } |
---|
| 245 | |
---|
| 246 | default: |
---|
| 247 | // do nothing |
---|
| 248 | ; |
---|
| 249 | } |
---|
| 250 | |
---|
| 251 | switch ( opInfo.type ) { |
---|
| 252 | case OT_INDEX: |
---|
| 253 | assert( applicationExpr->get_args().size() == 2 ); |
---|
| 254 | (*arg++)->accept( *this ); |
---|
[6c4ff37] | 255 | output << "["; |
---|
[51587aa] | 256 | (*arg)->accept( *this ); |
---|
[6c4ff37] | 257 | output << "]"; |
---|
[51587aa] | 258 | break; |
---|
| 259 | |
---|
| 260 | case OT_CALL: |
---|
| 261 | // there are no intrinsic definitions of the function call operator |
---|
| 262 | assert( false ); |
---|
| 263 | break; |
---|
| 264 | |
---|
| 265 | case OT_PREFIX: |
---|
| 266 | case OT_PREFIXASSIGN: |
---|
| 267 | assert( applicationExpr->get_args().size() == 1 ); |
---|
[6c4ff37] | 268 | output << "("; |
---|
| 269 | output << opInfo.symbol; |
---|
[51587aa] | 270 | (*arg)->accept( *this ); |
---|
[6c4ff37] | 271 | output << ")"; |
---|
[51587aa] | 272 | break; |
---|
| 273 | |
---|
| 274 | case OT_POSTFIX: |
---|
| 275 | case OT_POSTFIXASSIGN: |
---|
| 276 | assert( applicationExpr->get_args().size() == 1 ); |
---|
| 277 | (*arg)->accept( *this ); |
---|
[6c4ff37] | 278 | output << opInfo.symbol; |
---|
[51587aa] | 279 | break; |
---|
| 280 | |
---|
| 281 | case OT_INFIX: |
---|
| 282 | case OT_INFIXASSIGN: |
---|
| 283 | assert( applicationExpr->get_args().size() == 2 ); |
---|
[6c4ff37] | 284 | output << "("; |
---|
[51587aa] | 285 | (*arg++)->accept( *this ); |
---|
[6c4ff37] | 286 | output << opInfo.symbol; |
---|
[51587aa] | 287 | (*arg)->accept( *this ); |
---|
[6c4ff37] | 288 | output << ")"; |
---|
[51587aa] | 289 | break; |
---|
| 290 | |
---|
| 291 | case OT_CONSTANT: |
---|
[721f17a] | 292 | case OT_LABELADDRESS: |
---|
| 293 | // there are no intrinsic definitions of 0/1 or label addresses as functions |
---|
[51587aa] | 294 | assert( false ); |
---|
| 295 | } |
---|
[17cd4eb] | 296 | } else { |
---|
[51587aa] | 297 | varExpr->accept( *this ); |
---|
[6c4ff37] | 298 | output << "("; |
---|
[51587aa] | 299 | genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() ); |
---|
[6c4ff37] | 300 | output << ")"; |
---|
[17cd4eb] | 301 | } // if |
---|
[51587aa] | 302 | } else { |
---|
| 303 | applicationExpr->get_function()->accept( *this ); |
---|
[6c4ff37] | 304 | output << "("; |
---|
[51587aa] | 305 | genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() ); |
---|
[6c4ff37] | 306 | output << ")"; |
---|
[51587aa] | 307 | } // if |
---|
| 308 | } |
---|
[51b7345] | 309 | |
---|
[6c4ff37] | 310 | void CodeGenerator::visit( UntypedExpr *untypedExpr ) { |
---|
[51587aa] | 311 | if ( NameExpr *nameExpr = dynamic_cast< NameExpr* >( untypedExpr->get_function() ) ) { |
---|
| 312 | OperatorInfo opInfo; |
---|
| 313 | if ( operatorLookup( nameExpr->get_name(), opInfo ) ) { |
---|
| 314 | std::list< Expression* >::iterator arg = untypedExpr->get_args().begin(); |
---|
| 315 | switch ( opInfo.type ) { |
---|
| 316 | case OT_INDEX: |
---|
| 317 | assert( untypedExpr->get_args().size() == 2 ); |
---|
| 318 | (*arg++)->accept( *this ); |
---|
[6c4ff37] | 319 | output << "["; |
---|
[51587aa] | 320 | (*arg)->accept( *this ); |
---|
[6c4ff37] | 321 | output << "]"; |
---|
[51587aa] | 322 | break; |
---|
| 323 | |
---|
| 324 | case OT_CALL: |
---|
| 325 | assert( false ); |
---|
| 326 | break; |
---|
| 327 | |
---|
| 328 | case OT_PREFIX: |
---|
| 329 | case OT_PREFIXASSIGN: |
---|
[de62360d] | 330 | case OT_LABELADDRESS: |
---|
[51587aa] | 331 | assert( untypedExpr->get_args().size() == 1 ); |
---|
[6c4ff37] | 332 | output << "("; |
---|
| 333 | output << opInfo.symbol; |
---|
[51587aa] | 334 | (*arg)->accept( *this ); |
---|
[6c4ff37] | 335 | output << ")"; |
---|
[51587aa] | 336 | break; |
---|
| 337 | |
---|
| 338 | case OT_POSTFIX: |
---|
| 339 | case OT_POSTFIXASSIGN: |
---|
| 340 | assert( untypedExpr->get_args().size() == 1 ); |
---|
| 341 | (*arg)->accept( *this ); |
---|
[6c4ff37] | 342 | output << opInfo.symbol; |
---|
[51587aa] | 343 | break; |
---|
[51b7345] | 344 | |
---|
[51587aa] | 345 | case OT_INFIX: |
---|
| 346 | case OT_INFIXASSIGN: |
---|
| 347 | assert( untypedExpr->get_args().size() == 2 ); |
---|
[6c4ff37] | 348 | output << "("; |
---|
[51587aa] | 349 | (*arg++)->accept( *this ); |
---|
[6c4ff37] | 350 | output << opInfo.symbol; |
---|
[51587aa] | 351 | (*arg)->accept( *this ); |
---|
[6c4ff37] | 352 | output << ")"; |
---|
[51587aa] | 353 | break; |
---|
[de62360d] | 354 | |
---|
[51587aa] | 355 | case OT_CONSTANT: |
---|
| 356 | // there are no intrinsic definitions of 0 or 1 as functions |
---|
| 357 | assert( false ); |
---|
| 358 | } |
---|
| 359 | } else { |
---|
| 360 | nameExpr->accept( *this ); |
---|
[6c4ff37] | 361 | output << "("; |
---|
[51587aa] | 362 | genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() ); |
---|
[6c4ff37] | 363 | output << ")"; |
---|
[51587aa] | 364 | } // if |
---|
| 365 | } else { |
---|
| 366 | untypedExpr->get_function()->accept( *this ); |
---|
[6c4ff37] | 367 | output << "("; |
---|
[51587aa] | 368 | genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() ); |
---|
[6c4ff37] | 369 | output << ")"; |
---|
[51587aa] | 370 | } // if |
---|
| 371 | } |
---|
[51b7345] | 372 | |
---|
[6c4ff37] | 373 | void CodeGenerator::visit( NameExpr *nameExpr ) { |
---|
[51587aa] | 374 | OperatorInfo opInfo; |
---|
| 375 | if ( operatorLookup( nameExpr->get_name(), opInfo ) ) { |
---|
| 376 | assert( opInfo.type == OT_CONSTANT ); |
---|
[6c4ff37] | 377 | output << opInfo.symbol; |
---|
[51587aa] | 378 | } else { |
---|
[6c4ff37] | 379 | output << nameExpr->get_name(); |
---|
[51587aa] | 380 | } // if |
---|
| 381 | } |
---|
[51b7345] | 382 | |
---|
[6c4ff37] | 383 | void CodeGenerator::visit( AddressExpr *addressExpr ) { |
---|
| 384 | output << "(&"; |
---|
[51587aa] | 385 | // this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address |
---|
| 386 | if ( VariableExpr *variableExpr = dynamic_cast< VariableExpr* >( addressExpr->get_arg() ) ) { |
---|
[6c4ff37] | 387 | output << mangleName( variableExpr->get_var() ); |
---|
[51587aa] | 388 | } else { |
---|
| 389 | addressExpr->get_arg()->accept( *this ); |
---|
| 390 | } // if |
---|
[6c4ff37] | 391 | output << ")"; |
---|
[51587aa] | 392 | } |
---|
| 393 | |
---|
[6c4ff37] | 394 | void CodeGenerator::visit( CastExpr *castExpr ) { |
---|
[803deb1] | 395 | output << "("; |
---|
| 396 | if ( castExpr->get_results().empty() ) { |
---|
| 397 | output << "(void)" ; |
---|
| 398 | } else if ( ! castExpr->get_results().front()->get_isLvalue() ) { |
---|
| 399 | // at least one result type of cast, but not an lvalue |
---|
| 400 | output << "("; |
---|
| 401 | output << genType( castExpr->get_results().front(), "" ); |
---|
[76b48f1] | 402 | output << ")"; |
---|
[803deb1] | 403 | } else { |
---|
| 404 | // otherwise, the cast is to an lvalue type, so the cast |
---|
| 405 | // should be dropped, since the result of a cast is |
---|
| 406 | // never an lvalue in C |
---|
[76b48f1] | 407 | } |
---|
[803deb1] | 408 | castExpr->get_arg()->accept( *this ); |
---|
| 409 | output << ")"; |
---|
[51587aa] | 410 | } |
---|
[51b7345] | 411 | |
---|
[6c4ff37] | 412 | void CodeGenerator::visit( UntypedMemberExpr *memberExpr ) { |
---|
[51587aa] | 413 | assert( false ); |
---|
| 414 | } |
---|
[51b7345] | 415 | |
---|
[6c4ff37] | 416 | void CodeGenerator::visit( MemberExpr *memberExpr ) { |
---|
[51587aa] | 417 | memberExpr->get_aggregate()->accept( *this ); |
---|
[6c4ff37] | 418 | output << "." << mangleName( memberExpr->get_member() ); |
---|
[51587aa] | 419 | } |
---|
[51b7345] | 420 | |
---|
[6c4ff37] | 421 | void CodeGenerator::visit( VariableExpr *variableExpr ) { |
---|
[51587aa] | 422 | OperatorInfo opInfo; |
---|
| 423 | if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) { |
---|
[6c4ff37] | 424 | output << opInfo.symbol; |
---|
[51587aa] | 425 | } else { |
---|
[6c4ff37] | 426 | output << mangleName( variableExpr->get_var() ); |
---|
[51587aa] | 427 | } // if |
---|
| 428 | } |
---|
[51b7345] | 429 | |
---|
[6c4ff37] | 430 | void CodeGenerator::visit( ConstantExpr *constantExpr ) { |
---|
[51587aa] | 431 | assert( constantExpr->get_constant() ); |
---|
| 432 | constantExpr->get_constant()->accept( *this ); |
---|
| 433 | } |
---|
[51b7345] | 434 | |
---|
[6c4ff37] | 435 | void CodeGenerator::visit( SizeofExpr *sizeofExpr ) { |
---|
| 436 | output << "sizeof("; |
---|
[51587aa] | 437 | if ( sizeofExpr->get_isType() ) { |
---|
[6c4ff37] | 438 | output << genType( sizeofExpr->get_type(), "" ); |
---|
[51587aa] | 439 | } else { |
---|
| 440 | sizeofExpr->get_expr()->accept( *this ); |
---|
| 441 | } // if |
---|
[6c4ff37] | 442 | output << ")"; |
---|
[51587aa] | 443 | } |
---|
[47534159] | 444 | |
---|
[25a054f] | 445 | void CodeGenerator::visit( AlignofExpr *alignofExpr ) { |
---|
[47534159] | 446 | // use GCC extension to avoid bumping std to C11 |
---|
| 447 | output << "__alignof__("; |
---|
[25a054f] | 448 | if ( alignofExpr->get_isType() ) { |
---|
| 449 | output << genType( alignofExpr->get_type(), "" ); |
---|
[47534159] | 450 | } else { |
---|
[25a054f] | 451 | alignofExpr->get_expr()->accept( *this ); |
---|
[47534159] | 452 | } // if |
---|
| 453 | output << ")"; |
---|
| 454 | } |
---|
[803deb1] | 455 | |
---|
[2a4b088] | 456 | void CodeGenerator::visit( UntypedOffsetofExpr *offsetofExpr ) { |
---|
[afc1045] | 457 | assert( false && "UntypedOffsetofExpr should not reach code generation" ); |
---|
[2a4b088] | 458 | } |
---|
| 459 | |
---|
[25a054f] | 460 | void CodeGenerator::visit( OffsetofExpr *offsetofExpr ) { |
---|
| 461 | // use GCC builtin |
---|
| 462 | output << "__builtin_offsetof("; |
---|
| 463 | output << genType( offsetofExpr->get_type(), "" ); |
---|
[e551c69] | 464 | output << ", " << mangleName( offsetofExpr->get_member() ); |
---|
[25a054f] | 465 | output << ")"; |
---|
| 466 | } |
---|
[afc1045] | 467 | |
---|
| 468 | void CodeGenerator::visit( OffsetPackExpr *offsetPackExpr ) { |
---|
| 469 | assert( false && "OffsetPackExpr should not reach code generation" ); |
---|
| 470 | } |
---|
[51b7345] | 471 | |
---|
[6c4ff37] | 472 | void CodeGenerator::visit( LogicalExpr *logicalExpr ) { |
---|
| 473 | output << "("; |
---|
[51587aa] | 474 | logicalExpr->get_arg1()->accept( *this ); |
---|
| 475 | if ( logicalExpr->get_isAnd() ) { |
---|
[6c4ff37] | 476 | output << " && "; |
---|
[51587aa] | 477 | } else { |
---|
[6c4ff37] | 478 | output << " || "; |
---|
[51587aa] | 479 | } // if |
---|
| 480 | logicalExpr->get_arg2()->accept( *this ); |
---|
[6c4ff37] | 481 | output << ")"; |
---|
[51587aa] | 482 | } |
---|
[51b7345] | 483 | |
---|
[6c4ff37] | 484 | void CodeGenerator::visit( ConditionalExpr *conditionalExpr ) { |
---|
| 485 | output << "("; |
---|
[51587aa] | 486 | conditionalExpr->get_arg1()->accept( *this ); |
---|
[6c4ff37] | 487 | output << " ? "; |
---|
[51587aa] | 488 | conditionalExpr->get_arg2()->accept( *this ); |
---|
[6c4ff37] | 489 | output << " : "; |
---|
[51587aa] | 490 | conditionalExpr->get_arg3()->accept( *this ); |
---|
[6c4ff37] | 491 | output << ")"; |
---|
[51587aa] | 492 | } |
---|
[51b7345] | 493 | |
---|
[6c4ff37] | 494 | void CodeGenerator::visit( CommaExpr *commaExpr ) { |
---|
| 495 | output << "("; |
---|
[51587aa] | 496 | commaExpr->get_arg1()->accept( *this ); |
---|
[6c4ff37] | 497 | output << " , "; |
---|
[51587aa] | 498 | commaExpr->get_arg2()->accept( *this ); |
---|
[6c4ff37] | 499 | output << ")"; |
---|
[51587aa] | 500 | } |
---|
[51b7345] | 501 | |
---|
[6c4ff37] | 502 | void CodeGenerator::visit( TupleExpr *tupleExpr ) {} |
---|
[51b7345] | 503 | |
---|
[6c4ff37] | 504 | void CodeGenerator::visit( TypeExpr *typeExpr ) {} |
---|
[2b6c1e0] | 505 | |
---|
[7f5566b] | 506 | void CodeGenerator::visit( AsmExpr *asmExpr ) { |
---|
| 507 | if ( asmExpr->get_inout() ) { |
---|
| 508 | output << "[ "; |
---|
| 509 | asmExpr->get_inout()->accept( *this ); |
---|
| 510 | output << " ] "; |
---|
| 511 | } // if |
---|
| 512 | asmExpr->get_constraint()->accept( *this ); |
---|
| 513 | output << " ( "; |
---|
| 514 | asmExpr->get_operand()->accept( *this ); |
---|
| 515 | output << " )"; |
---|
| 516 | } |
---|
| 517 | |
---|
[51587aa] | 518 | //*** Statements |
---|
[6c4ff37] | 519 | void CodeGenerator::visit( CompoundStmt *compoundStmt ) { |
---|
[51587aa] | 520 | std::list<Statement*> ks = compoundStmt->get_kids(); |
---|
[2b6c1e0] | 521 | output << "{" << endl; |
---|
[51587aa] | 522 | |
---|
[2b6c1e0] | 523 | cur_indent += CodeGenerator::tabsize; |
---|
[51587aa] | 524 | |
---|
[7f5566b] | 525 | for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) { |
---|
[cda48b6] | 526 | output << indent << printLabels( (*i)->get_labels() ); |
---|
[7f5566b] | 527 | (*i)->accept( *this ); |
---|
[2b6c1e0] | 528 | |
---|
[6c4ff37] | 529 | output << endl; |
---|
[2b6c1e0] | 530 | if ( wantSpacing( *i ) ) { |
---|
| 531 | output << endl; |
---|
| 532 | } |
---|
[51587aa] | 533 | } |
---|
[6c4ff37] | 534 | cur_indent -= CodeGenerator::tabsize; |
---|
[51587aa] | 535 | |
---|
[cda48b6] | 536 | output << indent << "}"; |
---|
[51587aa] | 537 | } |
---|
| 538 | |
---|
[6c4ff37] | 539 | void CodeGenerator::visit( ExprStmt *exprStmt ) { |
---|
| 540 | // I don't see why this check is necessary. |
---|
| 541 | // If this starts to cause problems then put it back in, |
---|
| 542 | // with an explanation |
---|
| 543 | assert( exprStmt ); |
---|
| 544 | |
---|
| 545 | // if ( exprStmt != 0 ) { |
---|
| 546 | exprStmt->get_expr()->accept( *this ); |
---|
| 547 | output << ";" ; |
---|
| 548 | // } // if |
---|
[51587aa] | 549 | } |
---|
| 550 | |
---|
[7f5566b] | 551 | void CodeGenerator::visit( AsmStmt *asmStmt ) { |
---|
| 552 | output << "asm "; |
---|
| 553 | if ( asmStmt->get_voltile() ) output << "volatile "; |
---|
| 554 | if ( ! asmStmt->get_gotolabels().empty() ) output << "goto "; |
---|
| 555 | output << "( "; |
---|
| 556 | if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this ); |
---|
| 557 | output << " : "; |
---|
| 558 | genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() ); |
---|
| 559 | output << " : "; |
---|
| 560 | genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() ); |
---|
| 561 | output << " : "; |
---|
| 562 | genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() ); |
---|
| 563 | if ( ! asmStmt->get_gotolabels().empty() ) { |
---|
| 564 | output << " : "; |
---|
| 565 | for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) { |
---|
| 566 | output << *begin++; |
---|
| 567 | if ( begin == asmStmt->get_gotolabels().end() ) break; |
---|
| 568 | output << ", "; |
---|
| 569 | } // for |
---|
| 570 | } // if |
---|
| 571 | output << " );" ; |
---|
| 572 | } |
---|
| 573 | |
---|
[6c4ff37] | 574 | void CodeGenerator::visit( IfStmt *ifStmt ) { |
---|
[7f5566b] | 575 | output << "if ( "; |
---|
| 576 | ifStmt->get_condition()->accept( *this ); |
---|
| 577 | output << " ) "; |
---|
[51587aa] | 578 | |
---|
[7f5566b] | 579 | ifStmt->get_thenPart()->accept( *this ); |
---|
[51587aa] | 580 | |
---|
| 581 | if ( ifStmt->get_elsePart() != 0) { |
---|
[2b6c1e0] | 582 | output << " else "; |
---|
[7f5566b] | 583 | ifStmt->get_elsePart()->accept( *this ); |
---|
[51587aa] | 584 | } // if |
---|
| 585 | } |
---|
| 586 | |
---|
[6c4ff37] | 587 | void CodeGenerator::visit( SwitchStmt *switchStmt ) { |
---|
[7f5566b] | 588 | output << "switch ( " ; |
---|
| 589 | switchStmt->get_condition()->accept( *this ); |
---|
| 590 | output << " ) "; |
---|
[6c4ff37] | 591 | |
---|
[2b6c1e0] | 592 | output << "{" << std::endl; |
---|
[6c4ff37] | 593 | cur_indent += CodeGenerator::tabsize; |
---|
[51587aa] | 594 | |
---|
[6c4ff37] | 595 | acceptAll( switchStmt->get_branches(), *this ); |
---|
[51587aa] | 596 | |
---|
[6c4ff37] | 597 | cur_indent -= CodeGenerator::tabsize; |
---|
[51587aa] | 598 | |
---|
[cda48b6] | 599 | output << indent << "}"; |
---|
[51587aa] | 600 | } |
---|
| 601 | |
---|
[6c4ff37] | 602 | void CodeGenerator::visit( CaseStmt *caseStmt ) { |
---|
[cda48b6] | 603 | output << indent; |
---|
[eb3261f] | 604 | if ( caseStmt->isDefault()) { |
---|
[2b6c1e0] | 605 | output << "default"; |
---|
[eb3261f] | 606 | } else { |
---|
[2b6c1e0] | 607 | output << "case "; |
---|
[7f5566b] | 608 | caseStmt->get_condition()->accept( *this ); |
---|
[17cd4eb] | 609 | } // if |
---|
[6c4ff37] | 610 | output << ":\n"; |
---|
| 611 | |
---|
[51587aa] | 612 | std::list<Statement *> sts = caseStmt->get_statements(); |
---|
| 613 | |
---|
[6c4ff37] | 614 | cur_indent += CodeGenerator::tabsize; |
---|
[51587aa] | 615 | for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) { |
---|
[cda48b6] | 616 | output << indent << printLabels( (*i)->get_labels() ) ; |
---|
[7f5566b] | 617 | (*i)->accept( *this ); |
---|
[6c4ff37] | 618 | output << endl; |
---|
[51587aa] | 619 | } |
---|
[6c4ff37] | 620 | cur_indent -= CodeGenerator::tabsize; |
---|
[51587aa] | 621 | } |
---|
| 622 | |
---|
[6c4ff37] | 623 | void CodeGenerator::visit( BranchStmt *branchStmt ) { |
---|
[51587aa] | 624 | switch ( branchStmt->get_type()) { |
---|
| 625 | case BranchStmt::Goto: |
---|
| 626 | if ( ! branchStmt->get_target().empty() ) |
---|
[6c4ff37] | 627 | output << "goto " << branchStmt->get_target(); |
---|
[51587aa] | 628 | else { |
---|
| 629 | if ( branchStmt->get_computedTarget() != 0 ) { |
---|
[6c4ff37] | 630 | output << "goto *"; |
---|
[51587aa] | 631 | branchStmt->get_computedTarget()->accept( *this ); |
---|
| 632 | } // if |
---|
| 633 | } // if |
---|
| 634 | break; |
---|
| 635 | case BranchStmt::Break: |
---|
[6c4ff37] | 636 | output << "break"; |
---|
[51587aa] | 637 | break; |
---|
| 638 | case BranchStmt::Continue: |
---|
[6c4ff37] | 639 | output << "continue"; |
---|
[51587aa] | 640 | break; |
---|
| 641 | } |
---|
[2b6c1e0] | 642 | output << ";"; |
---|
[51587aa] | 643 | } |
---|
| 644 | |
---|
| 645 | |
---|
[6c4ff37] | 646 | void CodeGenerator::visit( ReturnStmt *returnStmt ) { |
---|
| 647 | output << "return "; |
---|
[51587aa] | 648 | |
---|
| 649 | // xxx -- check for null expression; |
---|
| 650 | if ( returnStmt->get_expr() ) { |
---|
| 651 | returnStmt->get_expr()->accept( *this ); |
---|
| 652 | } // if |
---|
[6c4ff37] | 653 | output << ";"; |
---|
[51587aa] | 654 | } |
---|
| 655 | |
---|
[6c4ff37] | 656 | void CodeGenerator::visit( WhileStmt *whileStmt ) { |
---|
[51587aa] | 657 | if ( whileStmt->get_isDoWhile() ) |
---|
[6c4ff37] | 658 | output << "do" ; |
---|
[51587aa] | 659 | else { |
---|
[6c4ff37] | 660 | output << "while (" ; |
---|
[7f5566b] | 661 | whileStmt->get_condition()->accept( *this ); |
---|
[6c4ff37] | 662 | output << ")"; |
---|
[51587aa] | 663 | } // if |
---|
[2b6c1e0] | 664 | output << " "; |
---|
[51587aa] | 665 | |
---|
[2b6c1e0] | 666 | output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() ); |
---|
[51587aa] | 667 | whileStmt->get_body()->accept( *this ); |
---|
| 668 | |
---|
[cda48b6] | 669 | output << indent; |
---|
[51587aa] | 670 | |
---|
| 671 | if ( whileStmt->get_isDoWhile() ) { |
---|
[6c4ff37] | 672 | output << " while (" ; |
---|
[7f5566b] | 673 | whileStmt->get_condition()->accept( *this ); |
---|
[6c4ff37] | 674 | output << ");"; |
---|
[51587aa] | 675 | } // if |
---|
| 676 | } |
---|
| 677 | |
---|
[6c4ff37] | 678 | void CodeGenerator::visit( ForStmt *forStmt ) { |
---|
[145f1fc] | 679 | // initialization is always hoisted, so don't |
---|
| 680 | // bother doing anything with that |
---|
| 681 | output << "for (;"; |
---|
[51587aa] | 682 | |
---|
| 683 | if ( forStmt->get_condition() != 0 ) |
---|
| 684 | forStmt->get_condition()->accept( *this ); |
---|
[6c4ff37] | 685 | output << ";"; |
---|
[51587aa] | 686 | |
---|
| 687 | if ( forStmt->get_increment() != 0 ) |
---|
| 688 | forStmt->get_increment()->accept( *this ); |
---|
[2b6c1e0] | 689 | output << ") "; |
---|
[51587aa] | 690 | |
---|
| 691 | if ( forStmt->get_body() != 0 ) { |
---|
[2b6c1e0] | 692 | output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() ); |
---|
[51587aa] | 693 | forStmt->get_body()->accept( *this ); |
---|
| 694 | } // if |
---|
| 695 | } |
---|
| 696 | |
---|
[6c4ff37] | 697 | void CodeGenerator::visit( NullStmt *nullStmt ) { |
---|
[cda48b6] | 698 | //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() ); |
---|
[6c4ff37] | 699 | output << "/* null statement */ ;"; |
---|
[51587aa] | 700 | } |
---|
| 701 | |
---|
[6c4ff37] | 702 | void CodeGenerator::visit( DeclStmt *declStmt ) { |
---|
[51587aa] | 703 | declStmt->get_decl()->accept( *this ); |
---|
| 704 | |
---|
| 705 | if ( doSemicolon( declStmt->get_decl() ) ) { |
---|
[6c4ff37] | 706 | output << ";"; |
---|
[51587aa] | 707 | } // if |
---|
| 708 | } |
---|
| 709 | |
---|
[6c4ff37] | 710 | std::string CodeGenerator::printLabels( std::list< Label > &l ) { |
---|
[51587aa] | 711 | std::string str( "" ); |
---|
[6c4ff37] | 712 | l.unique(); // assumes a sorted list. Why not use set? |
---|
[51587aa] | 713 | |
---|
| 714 | for ( std::list< Label >::iterator i = l.begin(); i != l.end(); i++ ) |
---|
| 715 | str += *i + ": "; |
---|
| 716 | |
---|
| 717 | return str; |
---|
| 718 | } |
---|
| 719 | |
---|
[6c4ff37] | 720 | void CodeGenerator::handleStorageClass( Declaration *decl ) { |
---|
[51587aa] | 721 | switch ( decl->get_storageClass() ) { |
---|
[68cd1ce] | 722 | case DeclarationNode::Extern: |
---|
[6c4ff37] | 723 | output << "extern "; |
---|
[51587aa] | 724 | break; |
---|
[68cd1ce] | 725 | case DeclarationNode::Static: |
---|
[6c4ff37] | 726 | output << "static "; |
---|
[51587aa] | 727 | break; |
---|
[68cd1ce] | 728 | case DeclarationNode::Auto: |
---|
[51587aa] | 729 | // silently drop storage class |
---|
| 730 | break; |
---|
[68cd1ce] | 731 | case DeclarationNode::Register: |
---|
[6c4ff37] | 732 | output << "register "; |
---|
[51587aa] | 733 | break; |
---|
[68cd1ce] | 734 | case DeclarationNode::Inline: |
---|
[de62360d] | 735 | output << "inline "; |
---|
[f38c8d9] | 736 | break; |
---|
[68cd1ce] | 737 | case DeclarationNode::Fortran: |
---|
| 738 | output << "fortran "; |
---|
| 739 | break; |
---|
| 740 | case DeclarationNode::Noreturn: |
---|
| 741 | output << "_Noreturn "; |
---|
| 742 | break; |
---|
| 743 | case DeclarationNode::Threadlocal: |
---|
| 744 | output << "_Thread_local "; |
---|
| 745 | break; |
---|
| 746 | case DeclarationNode::NoStorageClass: |
---|
[f38c8d9] | 747 | break; |
---|
[843054c2] | 748 | } // switch |
---|
[51587aa] | 749 | } |
---|
[51b7345] | 750 | } // namespace CodeGen |
---|
[51587aa] | 751 | |
---|
| 752 | // Local Variables: // |
---|
| 753 | // tab-width: 4 // |
---|
| 754 | // mode: c++ // |
---|
| 755 | // compile-command: "make install" // |
---|
| 756 | // End: // |
---|