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1 // Copyright 2014 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_COMMON_OPERATOR_REDUCER_H_
6 #define V8_COMPILER_COMMON_OPERATOR_REDUCER_H_
7 
8 #include "src/base/compiler-specific.h"
9 #include "src/common/globals.h"
10 #include "src/compiler/common-operator.h"
11 #include "src/compiler/graph-reducer.h"
12 
13 namespace v8 {
14 namespace internal {
15 namespace compiler {
16 
17 // Forward declarations.
18 class CommonOperatorBuilder;
19 class Graph;
20 class MachineOperatorBuilder;
21 class Operator;
22 
23 
24 // Performs strength reduction on nodes that have common operators.
25 class V8_EXPORT_PRIVATE CommonOperatorReducer final
NON_EXPORTED_BASE(AdvancedReducer)26     : public NON_EXPORTED_BASE(AdvancedReducer) {
27  public:
28   CommonOperatorReducer(Editor* editor, Graph* graph, JSHeapBroker* broker,
29                         CommonOperatorBuilder* common,
30                         MachineOperatorBuilder* machine, Zone* temp_zone,
31                         BranchSemantics branch_semantics);
32   ~CommonOperatorReducer() final = default;
33 
34   const char* reducer_name() const override { return "CommonOperatorReducer"; }
35 
36   Reduction Reduce(Node* node) final;
37 
38  private:
39   Reduction ReduceBranch(Node* node);
40   Reduction ReduceDeoptimizeConditional(Node* node);
41   Reduction ReduceMerge(Node* node);
42   Reduction ReduceEffectPhi(Node* node);
43   Reduction ReducePhi(Node* node);
44   Reduction ReduceReturn(Node* node);
45   Reduction ReduceSelect(Node* node);
46   Reduction ReduceSwitch(Node* node);
47   Reduction ReduceStaticAssert(Node* node);
48   Reduction ReduceTrapConditional(Node* node);
49 
50   Reduction Change(Node* node, Operator const* op, Node* a);
51   Reduction Change(Node* node, Operator const* op, Node* a, Node* b);
52 
53   // Helper to determine if conditions are true or false.
54   Decision DecideCondition(Node* const cond);
55 
56   Graph* graph() const { return graph_; }
57   JSHeapBroker* broker() const { return broker_; }
58   CommonOperatorBuilder* common() const { return common_; }
59   MachineOperatorBuilder* machine() const { return machine_; }
60   Node* dead() const { return dead_; }
61 
62   Graph* const graph_;
63   JSHeapBroker* const broker_;
64   CommonOperatorBuilder* const common_;
65   MachineOperatorBuilder* const machine_;
66   Node* const dead_;
67   Zone* zone_;
68   BranchSemantics branch_semantics_;
69 };
70 
71 }  // namespace compiler
72 }  // namespace internal
73 }  // namespace v8
74 
75 #endif  // V8_COMPILER_COMMON_OPERATOR_REDUCER_H_
76