[turbofan] move assembly order to InstructionBlock

src/compiler/instruction-selector.h

 // 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_INSTRUCTION_SELECTOR_H_
 #define V8_COMPILER_INSTRUCTION_SELECTOR_H_
 
 #include <deque>
 
 #include "src/compiler/common-operator.h"
@@ skipping 115 matching lines @@
   bool IsLive(Node* node) const { return !IsDefined(node) && IsUsed(node); }
 
   int GetVirtualRegister(const Node* node);
   // Gets the current mapping if it exists, kNodeUnmapped otherwise.
   int GetMappedVirtualRegister(const Node* node) const;
   const NodeToVregMap& GetNodeMapForTesting() const { return node_map_; }
 
  private:
   friend class OperandGenerator;
 
-  // Checks if {block} will appear directly after {current_block_} when
-  // assembling code, in which case, a fall-through can be used.
-  bool IsNextInAssemblyOrder(const BasicBlock* block) const;
-
   // Inform the instruction selection that {node} was just defined.
   void MarkAsDefined(Node* node);
 
   // Inform the instruction selection that {node} has at least one use and we
   // will need to generate code for it.
   void MarkAsUsed(Node* node);
 
   // Checks if {node} is marked as double.
   bool IsDouble(const Node* node) const;
 
@@ skipping 81 matching lines @@
   ZoneDeque<Instruction*> instructions_;
   BoolVector defined_;
   BoolVector used_;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_INSTRUCTION_SELECTOR_H_