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Side by Side Diff: pkg/compiler/lib/src/cps_ir/optimizers.dart

Issue 1415923012: Simple sharing and hoisting of final field loads (Closed) Base URL: https://github.com/dart-lang/sdk.git@master
Patch Set: Created 5 years, 1 month ago
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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 dart2js.cps_ir.optimizers; 5 library dart2js.cps_ir.optimizers;
6 6
7 import 'cps_ir_nodes.dart'; 7 import 'cps_ir_nodes.dart';
8 import '../constants/values.dart'; 8 import '../constants/values.dart';
9 9
10 export 'type_propagation.dart' show TypePropagator; 10 export 'type_propagation.dart' show TypePropagator;
11 export 'scalar_replacement.dart' show ScalarReplacer; 11 export 'scalar_replacement.dart' show ScalarReplacer;
12 export 'redundant_phi.dart' show RedundantPhiEliminator; 12 export 'redundant_phi.dart' show RedundantPhiEliminator;
13 export 'redundant_join.dart' show RedundantJoinEliminator; 13 export 'redundant_join.dart' show RedundantJoinEliminator;
14 export 'shrinking_reductions.dart' show ShrinkingReducer; 14 export 'shrinking_reductions.dart' show ShrinkingReducer;
15 export 'mutable_ssa.dart' show MutableVariableEliminator; 15 export 'mutable_ssa.dart' show MutableVariableEliminator;
16 export 'insert_refinements.dart' show InsertRefinements; 16 export 'insert_refinements.dart' show InsertRefinements;
17 export 'remove_refinements.dart' show RemoveRefinements; 17 export 'remove_refinements.dart' show RemoveRefinements;
18 export 'share_final_fields.dart' show ShareFinalFields;
18 export 'share_interceptors.dart' show ShareInterceptors; 19 export 'share_interceptors.dart' show ShareInterceptors;
19 export 'bounds_checker.dart' show BoundsChecker; 20 export 'bounds_checker.dart' show BoundsChecker;
20 export 'parent_visitor.dart' show ParentVisitor; 21 export 'parent_visitor.dart' show ParentVisitor;
21 22
22 /// An optimization pass over the CPS IR. 23 /// An optimization pass over the CPS IR.
23 abstract class Pass { 24 abstract class Pass {
24 /// Applies optimizations to root, rewriting it in the process. 25 /// Applies optimizations to root, rewriting it in the process.
25 void rewrite(FunctionDefinition root); 26 void rewrite(FunctionDefinition root);
26 27
27 String get passName; 28 String get passName;
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39 value is StringConstantValue && value.primitiveValue.isEmpty; 40 value is StringConstantValue && value.primitiveValue.isEmpty;
40 } 41 }
41 42
42 /// Returns true if [value] satisfies a branching condition with the 43 /// Returns true if [value] satisfies a branching condition with the
43 /// given strictness. 44 /// given strictness.
44 /// 45 ///
45 /// For non-strict, this is the opposite of [isFalsyConstant]. 46 /// For non-strict, this is the opposite of [isFalsyConstant].
46 bool isTruthyConstant(ConstantValue value, {bool strict: false}) { 47 bool isTruthyConstant(ConstantValue value, {bool strict: false}) {
47 return strict ? value.isTrue : !isFalsyConstant(value); 48 return strict ? value.isTrue : !isFalsyConstant(value);
48 } 49 }
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