Revert of [interpeter] Move to table based peephole optimizer.

src/interpreter/bytecode-peephole-optimizer.h

Index: src/interpreter/bytecode-peephole-optimizer.h
diff --git a/src/interpreter/bytecode-peephole-optimizer.h b/src/interpreter/bytecode-peephole-optimizer.h
index 95c9d57795e3029f5d49efa9699715d02bd8a67d..e6ada2aa1ef244c4f3c07c176f80ac26df4994ca 100644
--- a/src/interpreter/bytecode-peephole-optimizer.h
+++ b/src/interpreter/bytecode-peephole-optimizer.h
@@ -1,11 +1,10 @@
-// Copyright 2016 the V8 project authors. All rights reserved.
+// Copyright 2015 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_INTERPRETER_BYTECODE_PEEPHOLE_OPTIMIZER_H_
 #define V8_INTERPRETER_BYTECODE_PEEPHOLE_OPTIMIZER_H_
 
-#include "src/interpreter/bytecode-peephole-table.h"
 #include "src/interpreter/bytecode-pipeline.h"
 
 namespace v8 {
@@ -13,7 +12,6 @@
 namespace interpreter {
 
 class ConstantArrayBuilder;
-class BytecodePeepholeActionAndData;
 
 // An optimization stage for performing peephole optimizations on
 // generated bytecode. The optimizer may buffer one bytecode
@@ -34,25 +32,30 @@
       Handle<FixedArray> handler_table) override;
 
  private:
-#define DECLARE_ACTION(Action)          \
-  void Action(BytecodeNode* const node, \
-              const PeepholeActionAndData* const action_data = nullptr);
-  PEEPHOLE_ACTION_LIST(DECLARE_ACTION)
-#undef DECLARE_ACTION
+  BytecodeNode* OptimizeAndEmitLast(BytecodeNode* current);
+  BytecodeNode* Optimize(BytecodeNode* current);
+  void Flush();
 
-  void ApplyPeepholeAction(BytecodeNode* const node);
-  void Flush();
+  void TryToRemoveLastExpressionPosition(const BytecodeNode* const current);
+  bool TransformCurrentBytecode(BytecodeNode* const current);
+  bool TransformLastAndCurrentBytecodes(BytecodeNode* const current);
+  bool CanElideCurrent(const BytecodeNode* const current) const;
+  bool CanElideLast(const BytecodeNode* const current) const;
   bool CanElideLastBasedOnSourcePosition(
       const BytecodeNode* const current) const;
+
+  // Simple substitution methods.
+  bool RemoveToBooleanFromJump(BytecodeNode* const current);
+  bool RemoveToBooleanFromLogicalNot(BytecodeNode* const current);
+
   void InvalidateLast();
   bool LastIsValid() const;
   void SetLast(const BytecodeNode* const node);
 
+  bool LastBytecodePutsNameInAccumulator() const;
+
   Handle<Object> GetConstantForIndexOperand(const BytecodeNode* const node,
                                             int index) const;
-
-  BytecodePipelineStage* next_stage() const { return next_stage_; }
-  BytecodeNode* last() { return &last_; }
 
   ConstantArrayBuilder* constant_array_builder_;
   BytecodePipelineStage* next_stage_;