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| 1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file | |
| 2 // for details. All rights reserved. Use of this source code is governed by a | |
| 3 // BSD-style license that can be found in the LICENSE file. | |
| 4 | |
| 5 part of dart2js.ir_builder; | |
| 6 | |
| 7 /** | |
| 8 * This task iterates through all resolved elements and builds [ir.Node]s. The | |
| 9 * nodes are stored in the [nodes] map and accessible through [hasIr] and | |
| 10 * [getIr]. | |
| 11 * | |
| 12 * The functionality of the IrNodes is added gradually, therefore elements might | |
| 13 * have an IR or not, depending on the language features that are used. For | |
| 14 * elements that do have an IR, the tree [ast.Node]s and the [Token]s are not | |
| 15 * used in the rest of the compilation. This is ensured by setting the element's | |
| 16 * cached tree to `null` and also breaking the token stream to crash future | |
| 17 * attempts to parse. | |
| 18 * | |
| 19 * The type inferrer works on either IR nodes or tree nodes. The IR nodes are | |
| 20 * then translated into the SSA form for optimizations and code generation. | |
| 21 * Long-term, once the IR supports the full language, the backend can be | |
| 22 * re-implemented to work directly on the IR. | |
| 23 */ | |
| 24 class IrBuilderTask extends CompilerTask { | |
| 25 final Map<Element, ir.FunctionDefinition> nodes = | |
| 26 <Element, ir.FunctionDefinition>{}; | |
| 27 | |
| 28 IrBuilderTask(Compiler compiler) : super(compiler); | |
| 29 | |
| 30 String get name => 'IR builder'; | |
| 31 | |
| 32 bool hasIr(Element element) => nodes.containsKey(element.implementation); | |
| 33 | |
| 34 ir.FunctionDefinition getIr(Element element) => nodes[element.implementation]; | |
| 35 | |
| 36 void buildNodes({bool useNewBackend: false}) { | |
| 37 if (!irEnabled(useNewBackend: useNewBackend)) return; | |
| 38 measure(() { | |
| 39 Set<Element> resolved = compiler.enqueuer.resolution.resolvedElements; | |
| 40 resolved.forEach((AstElement element) { | |
| 41 if (canBuild(element)) { | |
| 42 TreeElements elementsMapping = element.resolvedAst.elements; | |
| 43 element = element.implementation; | |
| 44 compiler.withCurrentElement(element, () { | |
| 45 SourceFile sourceFile = elementSourceFile(element); | |
| 46 IrBuilderVisitor builder = | |
| 47 new IrBuilderVisitor(elementsMapping, compiler, sourceFile); | |
| 48 ir.FunctionDefinition function; | |
| 49 function = builder.buildFunction(element); | |
| 50 | |
| 51 if (function != null) { | |
| 52 nodes[element] = function; | |
| 53 compiler.tracer.traceCompilation(element.name, null); | |
| 54 compiler.tracer.traceGraph("IR Builder", function); | |
| 55 } | |
| 56 }); | |
| 57 } | |
| 58 }); | |
| 59 }); | |
| 60 } | |
| 61 | |
| 62 bool irEnabled({bool useNewBackend: false}) { | |
| 63 // TODO(sigurdm,kmillikin): Support checked-mode checks. | |
| 64 return (useNewBackend || const bool.fromEnvironment('USE_NEW_BACKEND')) && | |
| 65 compiler.backend is DartBackend && | |
| 66 !compiler.enableTypeAssertions && | |
| 67 !compiler.enableConcreteTypeInference; | |
| 68 } | |
| 69 | |
| 70 bool canBuild(Element element) { | |
| 71 FunctionElement function = element.asFunctionElement(); | |
| 72 // TODO(kmillikin,sigurdm): support lazy field initializers. | |
| 73 if (function == null) return false; | |
| 74 | |
| 75 if (!compiler.backend.shouldOutput(function)) return false; | |
| 76 | |
| 77 assert(invariant(element, !function.isNative)); | |
| 78 | |
| 79 // TODO(kmillikin,sigurdm): Support constructors. | |
| 80 if (function is ConstructorElement) return false; | |
| 81 | |
| 82 return true; | |
| 83 } | |
| 84 | |
| 85 bool get inCheckedMode { | |
| 86 bool result = false; | |
| 87 assert((result = true)); | |
| 88 return result; | |
| 89 } | |
| 90 | |
| 91 SourceFile elementSourceFile(Element element) { | |
| 92 if (element is FunctionElement) { | |
| 93 FunctionElement functionElement = element; | |
| 94 if (functionElement.patch != null) element = functionElement.patch; | |
| 95 } | |
| 96 return element.compilationUnit.script.file; | |
| 97 } | |
| 98 } | |
| 99 | |
| 100 class _GetterElements { | |
| 101 ir.Primitive result; | |
| 102 ir.Primitive index; | |
| 103 ir.Primitive receiver; | |
| 104 | |
| 105 _GetterElements({this.result, this.index, this.receiver}) ; | |
| 106 } | |
| 107 | |
| 108 /** | |
| 109 * A tree visitor that builds [IrNodes]. The visit methods add statements using | |
| 110 * to the [builder] and return the last added statement for trees that represent | |
| 111 * an expression. | |
| 112 */ | |
| 113 class IrBuilderVisitor extends ResolvedVisitor<ir.Primitive> | |
| 114 with IrBuilderMixin<ast.Node> { | |
| 115 final Compiler compiler; | |
| 116 final SourceFile sourceFile; | |
| 117 | |
| 118 // In SSA terms, join-point continuation parameters are the phis and the | |
| 119 // continuation invocation arguments are the corresponding phi inputs. To | |
| 120 // support name introduction and renaming for source level variables, we use | |
| 121 // nested (delimited) visitors for constructing subparts of the IR that will | |
| 122 // need renaming. Each source variable is assigned an index. | |
| 123 // | |
| 124 // Each nested visitor maintains a list of free variable uses in the body. | |
| 125 // These are implemented as a list of parameters, each with their own use | |
| 126 // list of references. When the delimited subexpression is plugged into the | |
| 127 // surrounding context, the free occurrences can be captured or become free | |
| 128 // occurrences in the next outer delimited subexpression. | |
| 129 // | |
| 130 // Each nested visitor maintains a list that maps indexes of variables | |
| 131 // assigned in the delimited subexpression to their reaching definition --- | |
| 132 // that is, the definition in effect at the hole in 'current'. These are | |
| 133 // used to determine if a join-point continuation needs to be passed | |
| 134 // arguments, and what the arguments are. | |
| 135 | |
| 136 /// Construct a top-level visitor. | |
| 137 IrBuilderVisitor(TreeElements elements, this.compiler, this.sourceFile) | |
| 138 : super(elements); | |
| 139 | |
| 140 /** | |
| 141 * Builds the [ir.FunctionDefinition] for a function element. In case the | |
| 142 * function uses features that cannot be expressed in the IR, this function | |
| 143 * returns `null`. | |
| 144 */ | |
| 145 ir.FunctionDefinition buildFunction(FunctionElement functionElement) { | |
| 146 return nullIfGiveup(() => buildFunctionInternal(functionElement)); | |
| 147 } | |
| 148 | |
| 149 ir.FunctionDefinition buildFunctionInternal(FunctionElement element) { | |
| 150 assert(invariant(element, element.isImplementation)); | |
| 151 ast.FunctionExpression function = element.node; | |
| 152 assert(function != null); | |
| 153 assert(!function.modifiers.isExternal); | |
| 154 assert(elements[function] != null); | |
| 155 | |
| 156 DetectClosureVariables closureLocals = new DetectClosureVariables(elements); | |
| 157 closureLocals.visit(function); | |
| 158 | |
| 159 return withBuilder( | |
| 160 new IrBuilder(compiler.backend.constantSystem, | |
| 161 element, closureLocals.usedFromClosure), | |
| 162 () { | |
| 163 FunctionSignature signature = element.functionSignature; | |
| 164 signature.orderedForEachParameter((ParameterElement parameterElement) { | |
| 165 irBuilder.createParameter(parameterElement); | |
| 166 }); | |
| 167 | |
| 168 List<ConstantExpression> defaults = new List<ConstantExpression>(); | |
| 169 signature.orderedOptionalParameters.forEach((ParameterElement element) { | |
| 170 defaults.add(getConstantForVariable(element)); | |
| 171 }); | |
| 172 | |
| 173 visit(function.body); | |
| 174 return irBuilder.buildFunctionDefinition(element, defaults); | |
| 175 }); | |
| 176 } | |
| 177 | |
| 178 ir.Primitive visit(ast.Node node) => node.accept(this); | |
| 179 | |
| 180 // ==== Statements ==== | |
| 181 visitBlock(ast.Block node) { | |
| 182 irBuilder.buildBlock(node.statements.nodes, build); | |
| 183 } | |
| 184 | |
| 185 ir.Primitive visitBreakStatement(ast.BreakStatement node) { | |
| 186 if (!irBuilder.buildBreak(elements.getTargetOf(node))) { | |
| 187 compiler.internalError(node, "'break' target not found"); | |
| 188 } | |
| 189 return null; | |
| 190 } | |
| 191 | |
| 192 ir.Primitive visitContinueStatement(ast.ContinueStatement node) { | |
| 193 if (!irBuilder.buildContinue(elements.getTargetOf(node))) { | |
| 194 compiler.internalError(node, "'continue' target not found"); | |
| 195 } | |
| 196 return null; | |
| 197 } | |
| 198 | |
| 199 // Build(EmptyStatement, C) = C | |
| 200 ir.Primitive visitEmptyStatement(ast.EmptyStatement node) { | |
| 201 assert(irBuilder.isOpen); | |
| 202 return null; | |
| 203 } | |
| 204 | |
| 205 // Build(ExpressionStatement(e), C) = C' | |
| 206 // where (C', _) = Build(e, C) | |
| 207 ir.Primitive visitExpressionStatement(ast.ExpressionStatement node) { | |
| 208 assert(irBuilder.isOpen); | |
| 209 visit(node.expression); | |
| 210 return null; | |
| 211 } | |
| 212 | |
| 213 visitFor(ast.For node) { | |
| 214 // TODO(kmillikin,sigurdm): Handle closure variables declared in a for-loop. | |
| 215 if (node.initializer is ast.VariableDefinitions) { | |
| 216 ast.VariableDefinitions definitions = node.initializer; | |
| 217 for (ast.Node definition in definitions.definitions.nodes) { | |
| 218 Element element = elements[definition]; | |
| 219 if (irBuilder.isClosureVariable(element)) { | |
| 220 return giveup(definition, 'Closure variable in for loop initializer'); | |
| 221 } | |
| 222 } | |
| 223 } | |
| 224 | |
| 225 JumpTarget target = elements.getTargetDefinition(node); | |
| 226 irBuilder.buildFor( | |
| 227 buildInitializer: subbuild(node.initializer), | |
| 228 buildCondition: subbuild(node.condition), | |
| 229 buildBody: subbuild(node.body), | |
| 230 buildUpdate: subbuildSequence(node.update), | |
| 231 target: target); | |
| 232 } | |
| 233 | |
| 234 visitIf(ast.If node) { | |
| 235 irBuilder.buildIf( | |
| 236 build(node.condition), | |
| 237 subbuild(node.thenPart), | |
| 238 subbuild(node.elsePart)); | |
| 239 } | |
| 240 | |
| 241 ir.Primitive visitLabeledStatement(ast.LabeledStatement node) { | |
| 242 ast.Statement body = node.statement; | |
| 243 return body is ast.Loop | |
| 244 ? visit(body) | |
| 245 : giveup(node, 'labeled statement'); | |
| 246 } | |
| 247 | |
| 248 visitWhile(ast.While node) { | |
| 249 irBuilder.buildWhile( | |
| 250 buildCondition: subbuild(node.condition), | |
| 251 buildBody: subbuild(node.body), | |
| 252 target: elements.getTargetDefinition(node)); | |
| 253 } | |
| 254 | |
| 255 visitForIn(ast.ForIn node) { | |
| 256 // [node.declaredIdentifier] can be either an [ast.VariableDefinitions] | |
| 257 // (defining a new local variable) or a send designating some existing | |
| 258 // variable. | |
| 259 ast.Node identifier = node.declaredIdentifier; | |
| 260 ast.VariableDefinitions variableDeclaration = | |
| 261 identifier.asVariableDefinitions(); | |
| 262 Element variableElement = elements.getForInVariable(node); | |
| 263 Selector selector = elements.getSelector(identifier); | |
| 264 | |
| 265 irBuilder.buildForIn( | |
| 266 buildExpression: subbuild(node.expression), | |
| 267 buildVariableDeclaration: subbuild(variableDeclaration), | |
| 268 variableElement: variableElement, | |
| 269 variableSelector: selector, | |
| 270 buildBody: subbuild(node.body), | |
| 271 target: elements.getTargetDefinition(node)); | |
| 272 } | |
| 273 | |
| 274 ir.Primitive visitVariableDefinitions(ast.VariableDefinitions node) { | |
| 275 assert(irBuilder.isOpen); | |
| 276 if (node.modifiers.isConst) { | |
| 277 for (ast.SendSet definition in node.definitions.nodes) { | |
| 278 assert(!definition.arguments.isEmpty); | |
| 279 assert(definition.arguments.tail.isEmpty); | |
| 280 VariableElement element = elements[definition]; | |
| 281 ConstantExpression value = getConstantForVariable(element); | |
| 282 irBuilder.declareLocalConstant(element, value); | |
| 283 } | |
| 284 } else { | |
| 285 for (ast.Node definition in node.definitions.nodes) { | |
| 286 Element element = elements[definition]; | |
| 287 ir.Primitive initialValue; | |
| 288 // Definitions are either SendSets if there is an initializer, or | |
| 289 // Identifiers if there is no initializer. | |
| 290 if (definition is ast.SendSet) { | |
| 291 assert(!definition.arguments.isEmpty); | |
| 292 assert(definition.arguments.tail.isEmpty); | |
| 293 initialValue = visit(definition.arguments.head); | |
| 294 } else { | |
| 295 assert(definition is ast.Identifier); | |
| 296 } | |
| 297 irBuilder.declareLocalVariable(element, initialValue: initialValue); | |
| 298 } | |
| 299 } | |
| 300 return null; | |
| 301 } | |
| 302 | |
| 303 // Build(Return(e), C) = C'[InvokeContinuation(return, x)] | |
| 304 // where (C', x) = Build(e, C) | |
| 305 // | |
| 306 // Return without a subexpression is translated as if it were return null. | |
| 307 ir.Primitive visitReturn(ast.Return node) { | |
| 308 assert(irBuilder.isOpen); | |
| 309 assert(invariant(node, node.beginToken.value != 'native')); | |
| 310 irBuilder.buildReturn(build(node.expression)); | |
| 311 return null; | |
| 312 } | |
| 313 | |
| 314 // ==== Expressions ==== | |
| 315 ir.Primitive visitConditional(ast.Conditional node) { | |
| 316 return irBuilder.buildConditional( | |
| 317 build(node.condition), | |
| 318 subbuild(node.thenExpression), | |
| 319 subbuild(node.elseExpression)); | |
| 320 } | |
| 321 | |
| 322 // For all simple literals: | |
| 323 // Build(Literal(c), C) = C[let val x = Constant(c) in [], x] | |
| 324 ir.Primitive visitLiteralBool(ast.LiteralBool node) { | |
| 325 assert(irBuilder.isOpen); | |
| 326 return translateConstant(node); | |
| 327 } | |
| 328 | |
| 329 ir.Primitive visitLiteralDouble(ast.LiteralDouble node) { | |
| 330 assert(irBuilder.isOpen); | |
| 331 return translateConstant(node); | |
| 332 } | |
| 333 | |
| 334 ir.Primitive visitLiteralInt(ast.LiteralInt node) { | |
| 335 assert(irBuilder.isOpen); | |
| 336 return translateConstant(node); | |
| 337 } | |
| 338 | |
| 339 ir.Primitive visitLiteralNull(ast.LiteralNull node) { | |
| 340 assert(irBuilder.isOpen); | |
| 341 return translateConstant(node); | |
| 342 } | |
| 343 | |
| 344 ir.Primitive visitLiteralString(ast.LiteralString node) { | |
| 345 assert(irBuilder.isOpen); | |
| 346 return translateConstant(node); | |
| 347 } | |
| 348 | |
| 349 ConstantExpression getConstantForNode(ast.Node node) { | |
| 350 ConstantExpression constant = | |
| 351 compiler.backend.constantCompilerTask.compileNode(node, elements); | |
| 352 assert(invariant(node, constant != null, | |
| 353 message: 'No constant computed for $node')); | |
| 354 return constant; | |
| 355 } | |
| 356 | |
| 357 ConstantExpression getConstantForVariable(VariableElement element) { | |
| 358 ConstantExpression constant = | |
| 359 compiler.backend.constants.getConstantForVariable(element); | |
| 360 assert(invariant(element, constant != null, | |
| 361 message: 'No constant computed for $element')); | |
| 362 return constant; | |
| 363 } | |
| 364 | |
| 365 ir.Primitive visitLiteralList(ast.LiteralList node) { | |
| 366 if (node.isConst) { | |
| 367 return translateConstant(node); | |
| 368 } | |
| 369 List<ir.Primitive> values = node.elements.nodes.mapToList(visit); | |
| 370 InterfaceType type = elements.getType(node); | |
| 371 return irBuilder.buildListLiteral(type, values); | |
| 372 } | |
| 373 | |
| 374 ir.Primitive visitLiteralMap(ast.LiteralMap node) { | |
| 375 if (node.isConst) { | |
| 376 return translateConstant(node); | |
| 377 } | |
| 378 InterfaceType type = elements.getType(node); | |
| 379 return irBuilder.buildMapLiteral( | |
| 380 type, | |
| 381 node.entries.nodes.map((e) => e.key), | |
| 382 node.entries.nodes.map((e) => e.value), | |
| 383 build); | |
| 384 } | |
| 385 | |
| 386 ir.Primitive visitLiteralSymbol(ast.LiteralSymbol node) { | |
| 387 assert(irBuilder.isOpen); | |
| 388 return translateConstant(node); | |
| 389 } | |
| 390 | |
| 391 ir.Primitive visitIdentifier(ast.Identifier node) { | |
| 392 // "this" is the only identifier that should be met by the visitor. | |
| 393 assert(node.isThis()); | |
| 394 return irBuilder.buildThis(); | |
| 395 } | |
| 396 | |
| 397 ir.Primitive visitParenthesizedExpression( | |
| 398 ast.ParenthesizedExpression node) { | |
| 399 assert(irBuilder.isOpen); | |
| 400 return visit(node.expression); | |
| 401 } | |
| 402 | |
| 403 // Stores the result of visiting a CascadeReceiver, so we can return it from | |
| 404 // its enclosing Cascade. | |
| 405 ir.Primitive _currentCascadeReceiver; | |
| 406 | |
| 407 ir.Primitive visitCascadeReceiver(ast.CascadeReceiver node) { | |
| 408 assert(irBuilder.isOpen); | |
| 409 return _currentCascadeReceiver = visit(node.expression); | |
| 410 } | |
| 411 | |
| 412 ir.Primitive visitCascade(ast.Cascade node) { | |
| 413 assert(irBuilder.isOpen); | |
| 414 var oldCascadeReceiver = _currentCascadeReceiver; | |
| 415 // Throw away the result of visiting the expression. | |
| 416 // Instead we return the result of visiting the CascadeReceiver. | |
| 417 this.visit(node.expression); | |
| 418 ir.Primitive receiver = _currentCascadeReceiver; | |
| 419 _currentCascadeReceiver = oldCascadeReceiver; | |
| 420 return receiver; | |
| 421 } | |
| 422 | |
| 423 // ==== Sends ==== | |
| 424 ir.Primitive visitAssert(ast.Send node) { | |
| 425 assert(irBuilder.isOpen); | |
| 426 return giveup(node, 'Assert'); | |
| 427 } | |
| 428 | |
| 429 ir.Primitive visitNamedArgument(ast.NamedArgument node) { | |
| 430 assert(irBuilder.isOpen); | |
| 431 return visit(node.expression); | |
| 432 } | |
| 433 | |
| 434 ir.Primitive translateClosureCall(ir.Primitive receiver, | |
| 435 Selector closureSelector, | |
| 436 ast.NodeList arguments) { | |
| 437 Selector namedCallSelector = new Selector(closureSelector.kind, | |
| 438 "call", | |
| 439 closureSelector.library, | |
| 440 closureSelector.argumentCount, | |
| 441 closureSelector.namedArguments); | |
| 442 List<ir.Primitive> args = arguments.nodes.mapToList(visit, growable:false); | |
| 443 return irBuilder.buildDynamicInvocation(receiver, namedCallSelector, args); | |
| 444 } | |
| 445 | |
| 446 ir.Primitive visitClosureSend(ast.Send node) { | |
| 447 assert(irBuilder.isOpen); | |
| 448 Element element = elements[node]; | |
| 449 ir.Primitive closureTarget; | |
| 450 if (element == null) { | |
| 451 closureTarget = visit(node.selector); | |
| 452 } else if (irBuilder.isClosureVariable(element)) { | |
| 453 LocalElement local = element; | |
| 454 closureTarget = new ir.GetClosureVariable(local); | |
| 455 irBuilder.add(new ir.LetPrim(closureTarget)); | |
| 456 } else { | |
| 457 assert(Elements.isLocal(element)); | |
| 458 closureTarget = irBuilder.environment.lookup(element); | |
| 459 } | |
| 460 Selector closureSelector = elements.getSelector(node); | |
| 461 return translateClosureCall(closureTarget, closureSelector, | |
| 462 node.argumentsNode); | |
| 463 } | |
| 464 | |
| 465 /// If [node] is null, returns this. | |
| 466 /// If [node] is super, returns null (for special handling) | |
| 467 /// Otherwise visits [node] and returns the result. | |
| 468 ir.Primitive visitReceiver(ast.Expression node) { | |
| 469 if (node == null) return irBuilder.buildThis(); | |
| 470 if (node.isSuper()) return null; | |
| 471 return visit(node); | |
| 472 } | |
| 473 | |
| 474 /// Returns `true` if [node] is a super call. | |
| 475 // TODO(johnniwinther): Remove the need for this. | |
| 476 bool isSuperCall(ast.Send node) { | |
| 477 return node != null && node.receiver != null && node.receiver.isSuper(); | |
| 478 } | |
| 479 | |
| 480 ir.Primitive visitDynamicSend(ast.Send node) { | |
| 481 assert(irBuilder.isOpen); | |
| 482 Selector selector = elements.getSelector(node); | |
| 483 ir.Primitive receiver = visitReceiver(node.receiver); | |
| 484 List<ir.Primitive> arguments = new List<ir.Primitive>(); | |
| 485 for (ast.Node n in node.arguments) { | |
| 486 arguments.add(visit(n)); | |
| 487 } | |
| 488 return irBuilder.buildDynamicInvocation(receiver, selector, arguments); | |
| 489 } | |
| 490 | |
| 491 _GetterElements translateGetter(ast.Send node, Selector selector) { | |
| 492 Element element = elements[node]; | |
| 493 ir.Primitive result; | |
| 494 ir.Primitive receiver; | |
| 495 ir.Primitive index; | |
| 496 | |
| 497 if (element != null && element.isConst) { | |
| 498 // Reference to constant local, top-level or static field | |
| 499 result = translateConstant(node); | |
| 500 } else if (Elements.isLocal(element)) { | |
| 501 // Reference to local variable | |
| 502 result = irBuilder.buildLocalGet(element); | |
| 503 } else if (element == null || | |
| 504 Elements.isInstanceField(element) || | |
| 505 Elements.isInstanceMethod(element) || | |
| 506 selector.isIndex || | |
| 507 // TODO(johnniwinther): clean up semantics of resolution. | |
| 508 node.isSuperCall) { | |
| 509 // Dynamic dispatch to a getter. Sometimes resolution will suggest a | |
| 510 // target element, but in these cases we must still emit a dynamic | |
| 511 // dispatch. The target element may be an instance method in case we are | |
| 512 // converting a method to a function object. | |
| 513 | |
| 514 receiver = visitReceiver(node.receiver); | |
| 515 List<ir.Primitive> arguments = new List<ir.Primitive>(); | |
| 516 if (selector.isIndex) { | |
| 517 index = visit(node.arguments.head); | |
| 518 arguments.add(index); | |
| 519 } | |
| 520 | |
| 521 assert(selector.kind == SelectorKind.GETTER || | |
| 522 selector.kind == SelectorKind.INDEX); | |
| 523 if (isSuperCall(node)) { | |
| 524 result = irBuilder.buildSuperInvocation(selector, arguments); | |
| 525 } else { | |
| 526 result = | |
| 527 irBuilder.buildDynamicInvocation(receiver, selector, arguments); | |
| 528 } | |
| 529 } else if (element.isField || element.isGetter || element.isErroneous || | |
| 530 element.isSetter) { | |
| 531 // TODO(johnniwinther): Change handling of setter selectors. | |
| 532 // Access to a static field or getter (non-static case handled above). | |
| 533 // Even if there is only a setter, we compile as if it was a getter, | |
| 534 // so the vm can fail at runtime. | |
| 535 assert(selector.kind == SelectorKind.GETTER || | |
| 536 selector.kind == SelectorKind.SETTER); | |
| 537 result = irBuilder.buildStaticGet(element, selector); | |
| 538 } else if (Elements.isStaticOrTopLevelFunction(element)) { | |
| 539 // Convert a top-level or static function to a function object. | |
| 540 result = translateConstant(node); | |
| 541 } else { | |
| 542 throw "Unexpected SendSet getter: $node, $element"; | |
| 543 } | |
| 544 return new _GetterElements( | |
| 545 result: result,index: index, receiver: receiver); | |
| 546 } | |
| 547 | |
| 548 ir.Primitive visitGetterSend(ast.Send node) { | |
| 549 assert(irBuilder.isOpen); | |
| 550 return translateGetter(node, elements.getSelector(node)).result; | |
| 551 | |
| 552 } | |
| 553 | |
| 554 ir.Primitive translateLogicalOperator(ast.Operator op, | |
| 555 ast.Expression left, | |
| 556 ast.Expression right) { | |
| 557 ir.Primitive leftValue = visit(left); | |
| 558 | |
| 559 ir.Primitive buildRightValue(IrBuilder rightBuilder) { | |
| 560 return withBuilder(rightBuilder, () => visit(right)); | |
| 561 } | |
| 562 | |
| 563 return irBuilder.buildLogicalOperator( | |
| 564 leftValue, buildRightValue, isLazyOr: op.source == '||'); | |
| 565 } | |
| 566 | |
| 567 ir.Primitive visitOperatorSend(ast.Send node) { | |
| 568 assert(irBuilder.isOpen); | |
| 569 ast.Operator op = node.selector; | |
| 570 if (isUserDefinableOperator(op.source)) { | |
| 571 return visitDynamicSend(node); | |
| 572 } | |
| 573 if (op.source == '&&' || op.source == '||') { | |
| 574 assert(node.receiver != null); | |
| 575 assert(!node.arguments.isEmpty); | |
| 576 assert(node.arguments.tail.isEmpty); | |
| 577 return translateLogicalOperator(op, node.receiver, node.arguments.head); | |
| 578 } | |
| 579 if (op.source == "!") { | |
| 580 assert(node.receiver != null); | |
| 581 assert(node.arguments.isEmpty); | |
| 582 return irBuilder.buildNegation(visit(node.receiver)); | |
| 583 } | |
| 584 if (op.source == "!=") { | |
| 585 assert(node.receiver != null); | |
| 586 assert(!node.arguments.isEmpty); | |
| 587 assert(node.arguments.tail.isEmpty); | |
| 588 return irBuilder.buildNegation(visitDynamicSend(node)); | |
| 589 } | |
| 590 assert(invariant(node, op.source == "is" || op.source == "as", | |
| 591 message: "unexpected operator $op")); | |
| 592 DartType type = elements.getType(node.typeAnnotationFromIsCheckOrCast); | |
| 593 ir.Primitive receiver = visit(node.receiver); | |
| 594 return irBuilder.buildTypeOperator( | |
| 595 receiver, type, | |
| 596 isTypeTest: op.source == "is", | |
| 597 isNotCheck: node.isIsNotCheck); | |
| 598 } | |
| 599 | |
| 600 // Build(StaticSend(f, arguments), C) = C[C'[InvokeStatic(f, xs)]] | |
| 601 // where (C', xs) = arguments.fold(Build, C) | |
| 602 ir.Primitive visitStaticSend(ast.Send node) { | |
| 603 assert(irBuilder.isOpen); | |
| 604 Element element = elements[node]; | |
| 605 assert(!element.isConstructor); | |
| 606 // TODO(lry): support foreign functions. | |
| 607 if (element.isForeign(compiler.backend)) { | |
| 608 return giveup(node, 'StaticSend: foreign'); | |
| 609 } | |
| 610 | |
| 611 Selector selector = elements.getSelector(node); | |
| 612 | |
| 613 // TODO(lry): support default arguments, need support for locals. | |
| 614 List<ir.Definition> arguments = node.arguments.mapToList(visit, | |
| 615 growable:false); | |
| 616 return irBuilder.buildStaticInvocation(element, selector, arguments); | |
| 617 } | |
| 618 | |
| 619 ir.Primitive visitSuperSend(ast.Send node) { | |
| 620 assert(irBuilder.isOpen); | |
| 621 if (node.isPropertyAccess) { | |
| 622 return visitGetterSend(node); | |
| 623 } else { | |
| 624 Selector selector = elements.getSelector(node); | |
| 625 List<ir.Primitive> arguments = new List<ir.Primitive>(); | |
| 626 for (ast.Node n in node.arguments) { | |
| 627 arguments.add(visit(n)); | |
| 628 } | |
| 629 return irBuilder.buildSuperInvocation(selector, arguments); | |
| 630 } | |
| 631 } | |
| 632 | |
| 633 visitTypePrefixSend(ast.Send node) { | |
| 634 compiler.internalError(node, "visitTypePrefixSend should not be called."); | |
| 635 } | |
| 636 | |
| 637 ir.Primitive visitTypeLiteralSend(ast.Send node) { | |
| 638 assert(irBuilder.isOpen); | |
| 639 // If the user is trying to invoke the type literal or variable, | |
| 640 // it must be treated as a function call. | |
| 641 if (node.argumentsNode != null) { | |
| 642 // TODO(sigurdm): Handle this to match proposed semantics of issue #19725. | |
| 643 return giveup(node, 'Type literal invoked as function'); | |
| 644 } | |
| 645 | |
| 646 DartType type = elements.getTypeLiteralType(node); | |
| 647 if (type is TypeVariableType) { | |
| 648 ir.Primitive prim = new ir.ReifyTypeVar(type.element); | |
| 649 irBuilder.add(new ir.LetPrim(prim)); | |
| 650 return prim; | |
| 651 } else { | |
| 652 return translateConstant(node); | |
| 653 } | |
| 654 } | |
| 655 | |
| 656 ir.Primitive visitSendSet(ast.SendSet node) { | |
| 657 assert(irBuilder.isOpen); | |
| 658 Element element = elements[node]; | |
| 659 ast.Operator op = node.assignmentOperator; | |
| 660 // For complex operators, this is the result of getting (before assigning) | |
| 661 ir.Primitive originalValue; | |
| 662 // For []+= style operators, this saves the index. | |
| 663 ir.Primitive index; | |
| 664 ir.Primitive receiver; | |
| 665 // This is what gets assigned. | |
| 666 ir.Primitive valueToStore; | |
| 667 Selector selector = elements.getSelector(node); | |
| 668 Selector operatorSelector = | |
| 669 elements.getOperatorSelectorInComplexSendSet(node); | |
| 670 Selector getterSelector = | |
| 671 elements.getGetterSelectorInComplexSendSet(node); | |
| 672 assert( | |
| 673 // Indexing send-sets have an argument for the index. | |
| 674 (selector.isIndexSet ? 1 : 0) + | |
| 675 // Non-increment send-sets have one more argument. | |
| 676 (ast.Operator.INCREMENT_OPERATORS.contains(op.source) ? 0 : 1) | |
| 677 == node.argumentCount()); | |
| 678 | |
| 679 ast.Node getAssignArgument() { | |
| 680 assert(invariant(node, !node.arguments.isEmpty, | |
| 681 message: "argument expected")); | |
| 682 return selector.isIndexSet | |
| 683 ? node.arguments.tail.head | |
| 684 : node.arguments.head; | |
| 685 } | |
| 686 | |
| 687 // Get the value into valueToStore | |
| 688 if (op.source == "=") { | |
| 689 if (selector.isIndexSet) { | |
| 690 receiver = visitReceiver(node.receiver); | |
| 691 index = visit(node.arguments.head); | |
| 692 } else if (element == null || Elements.isInstanceField(element)) { | |
| 693 receiver = visitReceiver(node.receiver); | |
| 694 } | |
| 695 valueToStore = visit(getAssignArgument()); | |
| 696 } else { | |
| 697 // Get the original value into getter | |
| 698 assert(ast.Operator.COMPLEX_OPERATORS.contains(op.source)); | |
| 699 | |
| 700 _GetterElements getterResult = translateGetter(node, getterSelector); | |
| 701 index = getterResult.index; | |
| 702 receiver = getterResult.receiver; | |
| 703 originalValue = getterResult.result; | |
| 704 | |
| 705 // Do the modification of the value in getter. | |
| 706 ir.Primitive arg; | |
| 707 if (ast.Operator.INCREMENT_OPERATORS.contains(op.source)) { | |
| 708 arg = irBuilder.buildIntegerLiteral(1); | |
| 709 } else { | |
| 710 arg = visit(getAssignArgument()); | |
| 711 } | |
| 712 valueToStore = new ir.Parameter(null); | |
| 713 ir.Continuation k = new ir.Continuation([valueToStore]); | |
| 714 ir.Expression invoke = | |
| 715 new ir.InvokeMethod(originalValue, operatorSelector, k, [arg]); | |
| 716 irBuilder.add(new ir.LetCont(k, invoke)); | |
| 717 } | |
| 718 | |
| 719 if (Elements.isLocal(element)) { | |
| 720 irBuilder.buildLocalSet(element, valueToStore); | |
| 721 } else if ((!node.isSuperCall && Elements.isErroneousElement(element)) || | |
| 722 Elements.isStaticOrTopLevel(element)) { | |
| 723 irBuilder.buildStaticSet( | |
| 724 element, elements.getSelector(node), valueToStore); | |
| 725 } else { | |
| 726 // Setter or index-setter invocation | |
| 727 Selector selector = elements.getSelector(node); | |
| 728 assert(selector.kind == SelectorKind.SETTER || | |
| 729 selector.kind == SelectorKind.INDEX); | |
| 730 if (selector.isIndexSet) { | |
| 731 if (isSuperCall(node)) { | |
| 732 irBuilder.buildSuperIndexSet(index, valueToStore); | |
| 733 } else { | |
| 734 irBuilder.buildDynamicIndexSet(receiver, index, valueToStore); | |
| 735 } | |
| 736 } else { | |
| 737 if (isSuperCall(node)) { | |
| 738 irBuilder.buildSuperSet(selector, valueToStore); | |
| 739 } else { | |
| 740 irBuilder.buildDynamicSet(receiver, selector, valueToStore); | |
| 741 } | |
| 742 } | |
| 743 } | |
| 744 | |
| 745 if (node.isPostfix) { | |
| 746 assert(originalValue != null); | |
| 747 return originalValue; | |
| 748 } else { | |
| 749 return valueToStore; | |
| 750 } | |
| 751 } | |
| 752 | |
| 753 ir.Primitive visitNewExpression(ast.NewExpression node) { | |
| 754 if (node.isConst) { | |
| 755 return translateConstant(node); | |
| 756 } | |
| 757 FunctionElement element = elements[node.send]; | |
| 758 Selector selector = elements.getSelector(node.send); | |
| 759 DartType type = elements.getType(node); | |
| 760 ast.Node selectorNode = node.send.selector; | |
| 761 List<ir.Definition> arguments = | |
| 762 node.send.arguments.mapToList(visit, growable:false); | |
| 763 return irBuilder.buildConstructorInvocation( | |
| 764 element, selector, type, arguments); | |
| 765 } | |
| 766 | |
| 767 ir.Primitive visitStringJuxtaposition(ast.StringJuxtaposition node) { | |
| 768 assert(irBuilder.isOpen); | |
| 769 ir.Primitive first = visit(node.first); | |
| 770 ir.Primitive second = visit(node.second); | |
| 771 return irBuilder.buildStringConcatenation([first, second]); | |
| 772 } | |
| 773 | |
| 774 ir.Primitive visitStringInterpolation(ast.StringInterpolation node) { | |
| 775 assert(irBuilder.isOpen); | |
| 776 List<ir.Primitive> arguments = []; | |
| 777 arguments.add(visitLiteralString(node.string)); | |
| 778 var it = node.parts.iterator; | |
| 779 while (it.moveNext()) { | |
| 780 ast.StringInterpolationPart part = it.current; | |
| 781 arguments.add(visit(part.expression)); | |
| 782 arguments.add(visitLiteralString(part.string)); | |
| 783 } | |
| 784 return irBuilder.buildStringConcatenation(arguments); | |
| 785 } | |
| 786 | |
| 787 ir.Primitive translateConstant(ast.Node node, [ConstantExpression constant]) { | |
| 788 assert(irBuilder.isOpen); | |
| 789 if (constant == null) { | |
| 790 constant = getConstantForNode(node); | |
| 791 } | |
| 792 return irBuilder.buildConstantLiteral(constant); | |
| 793 } | |
| 794 | |
| 795 ir.FunctionDefinition makeSubFunction(ast.FunctionExpression node) { | |
| 796 // TODO(johnniwinther): Share the visitor. | |
| 797 return new IrBuilderVisitor(elements, compiler, sourceFile) | |
| 798 .buildFunctionInternal(elements[node]); | |
| 799 } | |
| 800 | |
| 801 ir.Primitive visitFunctionExpression(ast.FunctionExpression node) { | |
| 802 FunctionElement element = elements[node]; | |
| 803 ir.FunctionDefinition inner = makeSubFunction(node); | |
| 804 ir.CreateFunction prim = new ir.CreateFunction(inner); | |
| 805 irBuilder.add(new ir.LetPrim(prim)); | |
| 806 return prim; | |
| 807 } | |
| 808 | |
| 809 ir.Primitive visitFunctionDeclaration(ast.FunctionDeclaration node) { | |
| 810 LocalFunctionElement element = elements[node.function]; | |
| 811 ir.FunctionDefinition inner = makeSubFunction(node.function); | |
| 812 if (irBuilder.isClosureVariable(element)) { | |
| 813 irBuilder.add(new ir.DeclareFunction(element, inner)); | |
| 814 } else { | |
| 815 ir.CreateFunction prim = new ir.CreateFunction(inner); | |
| 816 irBuilder.add(new ir.LetPrim(prim)); | |
| 817 irBuilder.environment.extend(element, prim); | |
| 818 prim.useElementAsHint(element); | |
| 819 } | |
| 820 return null; | |
| 821 } | |
| 822 | |
| 823 static final String ABORT_IRNODE_BUILDER = "IrNode builder aborted"; | |
| 824 | |
| 825 dynamic giveup(ast.Node node, [String reason]) { | |
| 826 throw ABORT_IRNODE_BUILDER; | |
| 827 } | |
| 828 | |
| 829 ir.FunctionDefinition nullIfGiveup(ir.FunctionDefinition action()) { | |
| 830 try { | |
| 831 return action(); | |
| 832 } catch(e, tr) { | |
| 833 if (e == ABORT_IRNODE_BUILDER) { | |
| 834 return null; | |
| 835 } | |
| 836 rethrow; | |
| 837 } | |
| 838 } | |
| 839 | |
| 840 void internalError(String reason, {ast.Node node}) { | |
| 841 giveup(node); | |
| 842 } | |
| 843 } | |
| 844 | |
| 845 /// Classifies local variables and local functions as 'closure variables'. | |
| 846 /// A closure variable is one that is accessed from an inner function nested | |
| 847 /// one or more levels inside the one that declares it. | |
| 848 class DetectClosureVariables extends ast.Visitor { | |
| 849 final TreeElements elements; | |
| 850 DetectClosureVariables(this.elements); | |
| 851 | |
| 852 FunctionElement currentFunction; | |
| 853 Set<Local> usedFromClosure = new Set<Local>(); | |
| 854 Set<FunctionElement> recursiveFunctions = new Set<FunctionElement>(); | |
| 855 | |
| 856 bool isClosureVariable(Entity entity) => usedFromClosure.contains(entity); | |
| 857 | |
| 858 void markAsClosureVariable(Local local) { | |
| 859 usedFromClosure.add(local); | |
| 860 } | |
| 861 | |
| 862 visit(ast.Node node) => node.accept(this); | |
| 863 | |
| 864 visitNode(ast.Node node) { | |
| 865 node.visitChildren(this); | |
| 866 } | |
| 867 | |
| 868 visitSend(ast.Send node) { | |
| 869 Element element = elements[node]; | |
| 870 if (Elements.isLocal(element) && | |
| 871 !element.isConst && | |
| 872 element.enclosingElement != currentFunction) { | |
| 873 LocalElement local = element; | |
| 874 markAsClosureVariable(local); | |
| 875 } | |
| 876 node.visitChildren(this); | |
| 877 } | |
| 878 | |
| 879 visitFunctionExpression(ast.FunctionExpression node) { | |
| 880 FunctionElement oldFunction = currentFunction; | |
| 881 currentFunction = elements[node]; | |
| 882 visit(node.body); | |
| 883 currentFunction = oldFunction; | |
| 884 } | |
| 885 } | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 694353007:
Move dart2js from sdk/lib/_internal/compiler to pkg/compiler (Closed)
Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart