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| 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, 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 interface HVisitor<R> { | 5 interface HVisitor<R> { |
| 6 R visitAdd(HAdd node); | 6 R visitAdd(HAdd node); |
| 7 R visitBailoutTarget(HBailoutTarget node); | 7 R visitBailoutTarget(HBailoutTarget node); |
| 8 R visitBitAnd(HBitAnd node); | 8 R visitBitAnd(HBitAnd node); |
| 9 R visitBitNot(HBitNot node); | 9 R visitBitNot(HBitNot node); |
| 10 R visitBitOr(HBitOr node); | 10 R visitBitOr(HBitOr node); |
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| 734 if (this === other) return true; | 734 if (this === other) return true; |
| 735 other = other.dominator; | 735 other = other.dominator; |
| 736 } while (other !== null && other.id >= id); | 736 } while (other !== null && other.id >= id); |
| 737 return false; | 737 return false; |
| 738 } | 738 } |
| 739 } | 739 } |
| 740 | 740 |
| 741 | 741 |
| 742 class HInstruction implements Hashable { | 742 class HInstruction implements Hashable { |
| 743 Element sourceElement; | 743 Element sourceElement; |
| 744 Token sourcePosition; | 744 SourceFileLocation sourcePosition; |
| 745 | 745 |
| 746 final int id; | 746 final int id; |
| 747 static int idCounter; | 747 static int idCounter; |
| 748 | 748 |
| 749 final List<HInstruction> inputs; | 749 final List<HInstruction> inputs; |
| 750 final List<HInstruction> usedBy; | 750 final List<HInstruction> usedBy; |
| 751 | 751 |
| 752 HBasicBlock block; | 752 HBasicBlock block; |
| 753 HInstruction previous = null; | 753 HInstruction previous = null; |
| 754 HInstruction next = null; | 754 HInstruction next = null; |
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| 2746 static const int FOR_IN_LOOP = 3; | 2746 static const int FOR_IN_LOOP = 3; |
| 2747 static const int NOT_A_LOOP = -1; | 2747 static const int NOT_A_LOOP = -1; |
| 2748 | 2748 |
| 2749 final int kind; | 2749 final int kind; |
| 2750 final HExpressionInformation initializer; | 2750 final HExpressionInformation initializer; |
| 2751 final HExpressionInformation condition; | 2751 final HExpressionInformation condition; |
| 2752 final HStatementInformation body; | 2752 final HStatementInformation body; |
| 2753 final HExpressionInformation updates; | 2753 final HExpressionInformation updates; |
| 2754 final TargetElement target; | 2754 final TargetElement target; |
| 2755 final List<LabelElement> labels; | 2755 final List<LabelElement> labels; |
| 2756 final Node sourcePosition; | 2756 final SourceFileLocation sourcePosition; |
| 2757 final SourceFileLocation endSourcePosition; |
| 2757 | 2758 |
| 2758 HLoopBlockInformation(this.kind, | 2759 HLoopBlockInformation(this.kind, |
| 2759 this.initializer, | 2760 this.initializer, |
| 2760 this.condition, | 2761 this.condition, |
| 2761 this.body, | 2762 this.body, |
| 2762 this.updates, | 2763 this.updates, |
| 2763 this.target, | 2764 this.target, |
| 2764 this.labels, | 2765 this.labels, |
| 2765 this.sourcePosition); | 2766 this.sourcePosition, |
| 2767 this.endSourcePosition); |
| 2766 | 2768 |
| 2767 HBasicBlock get start { | 2769 HBasicBlock get start { |
| 2768 if (initializer !== null) return initializer.start; | 2770 if (initializer !== null) return initializer.start; |
| 2769 if (kind == DO_WHILE_LOOP) { | 2771 if (kind == DO_WHILE_LOOP) { |
| 2770 return body.start; | 2772 return body.start; |
| 2771 } | 2773 } |
| 2772 return condition.start; | 2774 return condition.start; |
| 2773 } | 2775 } |
| 2774 | 2776 |
| 2775 HBasicBlock get loopHeader { | 2777 HBasicBlock get loopHeader { |
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| 2866 HBasicBlock get start => expression.start; | 2868 HBasicBlock get start => expression.start; |
| 2867 HBasicBlock get end { | 2869 HBasicBlock get end { |
| 2868 // We don't create a switch block if there are no cases. | 2870 // We don't create a switch block if there are no cases. |
| 2869 assert(!statements.isEmpty()); | 2871 assert(!statements.isEmpty()); |
| 2870 return statements.last().end; | 2872 return statements.last().end; |
| 2871 } | 2873 } |
| 2872 | 2874 |
| 2873 bool accept(HStatementInformationVisitor visitor) => | 2875 bool accept(HStatementInformationVisitor visitor) => |
| 2874 visitor.visitSwitchInfo(this); | 2876 visitor.visitSwitchInfo(this); |
| 2875 } | 2877 } |
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