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| 1 // Copyright 2015 the V8 project authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef V8_COMPILER_JS_TYPE_FEEDBACK_LOWERING_H_ |
| 6 #define V8_COMPILER_JS_TYPE_FEEDBACK_LOWERING_H_ |
| 7 |
| 8 #include "src/base/flags.h" |
| 9 #include "src/compiler/graph-reducer.h" |
| 10 #include "src/compiler/simplified-operator.h" |
| 11 |
| 12 namespace v8 { |
| 13 namespace internal { |
| 14 namespace compiler { |
| 15 |
| 16 // Forward declarations. |
| 17 class CommonOperatorBuilder; |
| 18 class JSGraph; |
| 19 class MachineOperatorBuilder; |
| 20 |
| 21 |
| 22 // Lowers JS-level operators to simplified operators based on type feedback. |
| 23 class JSTypeFeedbackLowering final : public AdvancedReducer { |
| 24 public: |
| 25 // Various configuration flags to control the operation of this lowering. |
| 26 enum Flag { |
| 27 kNoFlags = 0, |
| 28 kDeoptimizationEnabled = 1 << 0, |
| 29 }; |
| 30 typedef base::Flags<Flag> Flags; |
| 31 |
| 32 JSTypeFeedbackLowering(Editor* editor, Flags flags, JSGraph* jsgraph); |
| 33 ~JSTypeFeedbackLowering() final {} |
| 34 |
| 35 Reduction Reduce(Node* node) final; |
| 36 |
| 37 private: |
| 38 Reduction ReduceJSLoadNamed(Node* node); |
| 39 |
| 40 Factory* factory() const; |
| 41 Flags flags() const { return flags_; } |
| 42 Graph* graph() const; |
| 43 Isolate* isolate() const; |
| 44 JSGraph* jsgraph() const { return jsgraph_; } |
| 45 CommonOperatorBuilder* common() const; |
| 46 MachineOperatorBuilder* machine() const; |
| 47 SimplifiedOperatorBuilder* simplified() { return &simplified_; } |
| 48 |
| 49 Flags const flags_; |
| 50 JSGraph* const jsgraph_; |
| 51 SimplifiedOperatorBuilder simplified_; |
| 52 |
| 53 DISALLOW_COPY_AND_ASSIGN(JSTypeFeedbackLowering); |
| 54 }; |
| 55 |
| 56 DEFINE_OPERATORS_FOR_FLAGS(JSTypeFeedbackLowering::Flags) |
| 57 |
| 58 } // namespace compiler |
| 59 } // namespace internal |
| 60 } // namespace v8 |
| 61 |
| 62 #endif // V8_COMPILER_JS_TYPE_FEEDBACK_LOWERING_H_ |
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