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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 part of ssa; | |
6 | |
7 class SsaTypePropagator extends HGraphVisitor implements OptimizationPhase { | 5 class SsaTypePropagator extends HGraphVisitor implements OptimizationPhase { |
8 | 6 |
9 final Map<int, HInstruction> workmap; | 7 final Map<int, HInstruction> workmap; |
10 final List<int> worklist; | 8 final List<int> worklist; |
11 final Map<HInstruction, Function> pendingOptimizations; | 9 final Map<HInstruction, Function> pendingOptimizations; |
12 final HTypeMap types; | 10 final HTypeMap types; |
13 | 11 |
14 final Compiler compiler; | 12 final Compiler compiler; |
15 String get name => 'type propagator'; | 13 String get name => 'type propagator'; |
16 | 14 |
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203 // TODO(ngeoffray): Allow speculative optimizations on | 201 // TODO(ngeoffray): Allow speculative optimizations on |
204 // non-primitive types? | 202 // non-primitive types? |
205 if (!desiredType.isPrimitive()) return newType; | 203 if (!desiredType.isPrimitive()) return newType; |
206 return newType.intersection(desiredType); | 204 return newType.intersection(desiredType); |
207 } | 205 } |
208 | 206 |
209 // Do not use speculative argument type optimization for now. | 207 // Do not use speculative argument type optimization for now. |
210 void considerForArgumentTypeOptimization(HInstruction instruction) { } | 208 void considerForArgumentTypeOptimization(HInstruction instruction) { } |
211 | 209 |
212 } | 210 } |
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