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src/compiler/js-typed-lowering.h

Index: src/compiler/js-typed-lowering.h
diff --git a/src/compiler/js-typed-lowering.h b/src/compiler/js-typed-lowering.h
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+// Copyright 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef V8_COMPILER_OPERATOR_REDUCERS_H_
+#define V8_COMPILER_OPERATOR_REDUCERS_H_
+
+#include "src/compiler/graph-reducer.h"
+#include "src/compiler/js-graph.h"
+#include "src/compiler/lowering-builder.h"
+#include "src/compiler/machine-operator.h"
+#include "src/compiler/node.h"
+#include "src/compiler/simplified-operator.h"
+
+namespace v8 {
+namespace internal {
+namespace compiler {
+
+class JSBinopReduction;
+
+// Lowers JS-level operators to simplified operators based on types.
+class JSTypedLowering : public LoweringBuilder {
+ public:
+  explicit JSTypedLowering(JSGraph* jsgraph,
+                           SourcePositionTable* source_positions)
+      : LoweringBuilder(jsgraph->graph(), source_positions),
+        jsgraph_(jsgraph),
+        simplified_(jsgraph->zone()),
+        machine_(jsgraph->zone()) {}
+  virtual ~JSTypedLowering() {}
+
+  Reduction Reduce(Node* node);
+  virtual void Lower(Node* node) { Reduce(node); }
+
+  JSGraph* jsgraph() { return jsgraph_; }
+  Graph* graph() { return jsgraph_->graph(); }
+
+ private:
+  friend class JSBinopReduction;
+  JSGraph* jsgraph_;
+  SimplifiedOperatorBuilder simplified_;
+  MachineOperatorBuilder machine_;
+
+  Reduction ReplaceEagerly(Node* old, Node* node);
+  Reduction NoChange() { return Reducer::NoChange(); }
+  Reduction ReplaceWith(Node* node) { return Reducer::Replace(node); }
+  Reduction Changed(Node* node) { return Reducer::Changed(node); }
+  Reduction ReduceJSAdd(Node* node);
+  Reduction ReduceJSComparison(Node* node);
+  Reduction ReduceJSEqual(Node* node, bool invert);
+  Reduction ReduceJSStrictEqual(Node* node, bool invert);
+  Reduction ReduceJSToNumberInput(Node* input);
+  Reduction ReduceJSToStringInput(Node* input);
+  Reduction ReduceJSToBooleanInput(Node* input);
+  Reduction ReduceNumberBinop(Node* node, Operator* numberOp);
+  Reduction ReduceI32Binop(Node* node, bool left_signed, bool right_signed,
+                           Operator* intOp);
+  Reduction ReduceI32Shift(Node* node, bool left_signed, Operator* shift_op);
+
+  JSOperatorBuilder* javascript() { return jsgraph_->javascript(); }
+  CommonOperatorBuilder* common() { return jsgraph_->common(); }
+  SimplifiedOperatorBuilder* simplified() { return &simplified_; }
+  MachineOperatorBuilder* machine() { return &machine_; }
+};
+}
+}
+}  // namespace v8::internal::compiler
+
+#endif  // V8_COMPILER_OPERATOR_REDUCERS_H_