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1 // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 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. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 library tree_ir_tracer; | 5 library tree_ir_tracer; |
6 | 6 |
7 import 'dart:async' show EventSink; | 7 import 'dart:async' show EventSink; |
8 import '../tracer.dart'; | 8 import '../tracer.dart'; |
9 import 'tree_ir_nodes.dart'; | 9 import 'tree_ir_nodes.dart'; |
10 | 10 |
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171 } | 171 } |
172 | 172 |
173 visitExpressionStatement(ExpressionStatement node) { | 173 visitExpressionStatement(ExpressionStatement node) { |
174 _addStatement(node); | 174 _addStatement(node); |
175 visitStatement(node.next); | 175 visitStatement(node.next); |
176 } | 176 } |
177 | 177 |
178 visitForeignStatement(ForeignStatement node) { | 178 visitForeignStatement(ForeignStatement node) { |
179 _addStatement(node); | 179 _addStatement(node); |
180 } | 180 } |
| 181 |
| 182 @override |
| 183 visitYield(Yield node) { |
| 184 _addStatement(node); |
| 185 } |
181 } | 186 } |
182 | 187 |
183 class TreeTracer extends TracerUtil with StatementVisitor { | 188 class TreeTracer extends TracerUtil with StatementVisitor { |
184 String get passName => null; | 189 String get passName => null; |
185 | 190 |
186 final EventSink<String> output; | 191 final EventSink<String> output; |
187 | 192 |
188 TreeTracer(this.output); | 193 TreeTracer(this.output); |
189 | 194 |
190 List<Variable> parameters; | 195 List<Variable> parameters; |
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329 } | 334 } |
330 | 335 |
331 String expr(Expression e) { | 336 String expr(Expression e) { |
332 return e.accept(new SubexpressionVisitor(names)); | 337 return e.accept(new SubexpressionVisitor(names)); |
333 } | 338 } |
334 | 339 |
335 @override | 340 @override |
336 visitForeignStatement(ForeignStatement node) { | 341 visitForeignStatement(ForeignStatement node) { |
337 printStatement(null, 'foreign ${node.codeTemplate.source}'); | 342 printStatement(null, 'foreign ${node.codeTemplate.source}'); |
338 } | 343 } |
| 344 |
| 345 @override |
| 346 visitYield(Yield node) { |
| 347 printStatement(null, 'yield ${expr(node.input)}'); |
| 348 } |
339 } | 349 } |
340 | 350 |
341 class SubexpressionVisitor extends ExpressionVisitor<String> { | 351 class SubexpressionVisitor extends ExpressionVisitor<String> { |
342 Names names; | 352 Names names; |
343 | 353 |
344 SubexpressionVisitor(this.names); | 354 SubexpressionVisitor(this.names); |
345 | 355 |
346 String visitVariableUse(VariableUse node) { | 356 String visitVariableUse(VariableUse node) { |
347 return names.varName(node.variable); | 357 return names.varName(node.variable); |
348 } | 358 } |
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562 String index = visitExpression(node.index); | 572 String index = visitExpression(node.index); |
563 String value = visitExpression(node.value); | 573 String value = visitExpression(node.value); |
564 return 'SetIndex($object, $index, $value)'; | 574 return 'SetIndex($object, $index, $value)'; |
565 } | 575 } |
566 | 576 |
567 @override | 577 @override |
568 String visitAwait(Await node) { | 578 String visitAwait(Await node) { |
569 String value = visitExpression(node.input); | 579 String value = visitExpression(node.input); |
570 return 'Await($value)'; | 580 return 'Await($value)'; |
571 } | 581 } |
| 582 |
| 583 @override |
| 584 String visitYield(Yield node) { |
| 585 String value = visitExpression(node.input); |
| 586 return 'Yield($value)'; |
| 587 } |
572 } | 588 } |
573 | 589 |
574 /** | 590 /** |
575 * Invents (and remembers) names for Variables that do not have an associated | 591 * Invents (and remembers) names for Variables that do not have an associated |
576 * identifier. | 592 * identifier. |
577 * | 593 * |
578 * In case a variable is named v0, v1, etc, it may be assigned a different | 594 * In case a variable is named v0, v1, etc, it may be assigned a different |
579 * name to avoid clashing with a previously synthesized variable name. | 595 * name to avoid clashing with a previously synthesized variable name. |
580 */ | 596 */ |
581 class Names { | 597 class Names { |
582 final Map<Variable, String> _names = {}; | 598 final Map<Variable, String> _names = {}; |
583 final Set<String> _usedNames = new Set(); | 599 final Set<String> _usedNames = new Set(); |
584 int _counter = 0; | 600 int _counter = 0; |
585 | 601 |
586 String varName(Variable v) { | 602 String varName(Variable v) { |
587 String name = _names[v]; | 603 String name = _names[v]; |
588 if (name == null) { | 604 if (name == null) { |
589 String prefix = v.element == null ? 'v' : '${v.element.name}_'; | 605 String prefix = v.element == null ? 'v' : '${v.element.name}_'; |
590 while (name == null || _usedNames.contains(name)) { | 606 while (name == null || _usedNames.contains(name)) { |
591 name = "$prefix${_counter++}"; | 607 name = "$prefix${_counter++}"; |
592 } | 608 } |
593 _names[v] = name; | 609 _names[v] = name; |
594 _usedNames.add(name); | 610 _usedNames.add(name); |
595 } | 611 } |
596 return name; | 612 return name; |
597 } | 613 } |
598 } | 614 } |
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