Remove the support for jump-table switches from the x64 port as well.

src/x64/codegen-x64.h

 // Copyright 2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 515 matching lines @@
 
   // Fast support for Math.random().
   void GenerateRandomPositiveSmi(ZoneList<Expression*>* args);
 
   // Fast support for Math.sin and Math.cos.
   enum MathOp { SIN, COS };
   void GenerateFastMathOp(MathOp op, ZoneList<Expression*>* args);
   inline void GenerateMathSin(ZoneList<Expression*>* args);
   inline void GenerateMathCos(ZoneList<Expression*>* args);
 
-  // Methods and constants for fast case switch statement support.
-  //
-  // Only allow fast-case switch if the range of labels is at most
-  // this factor times the number of case labels.
-  // Value is derived from comparing the size of code generated by the normal
-  // switch code for Smi-labels to the size of a single pointer. If code
-  // quality increases this number should be decreased to match.
-  static const int kFastSwitchMaxOverheadFactor = 5;
-
-  // Minimal number of switch cases required before we allow jump-table
-  // optimization.
-  static const int kFastSwitchMinCaseCount = 5;
-
-  // The limit of the range of a fast-case switch, as a factor of the number
-  // of cases of the switch. Each platform should return a value that
-  // is optimal compared to the default code generated for a switch statement
-  // on that platform.
-  int FastCaseSwitchMaxOverheadFactor();
-
-  // The minimal number of cases in a switch before the fast-case switch
-  // optimization is enabled. Each platform should return a value that
-  // is optimal compared to the default code generated for a switch statement
-  // on that platform.
-  int FastCaseSwitchMinCaseCount();
-
-  // Allocate a jump table and create code to jump through it.
-  // Should call GenerateFastCaseSwitchCases to generate the code for
-  // all the cases at the appropriate point.
-  void GenerateFastCaseSwitchJumpTable(SwitchStatement* node,
-                                       int min_index,
-                                       int range,
-                                       Label* fail_label,
-                                       Vector<Label*> case_targets,
-                                       Vector<Label> case_labels);
-
-  // Generate the code for cases for the fast case switch.
-  // Called by GenerateFastCaseSwitchJumpTable.
-  void GenerateFastCaseSwitchCases(SwitchStatement* node,
-                                   Vector<Label> case_labels,
-                                   VirtualFrame* start_frame);
-
-  // Fast support for constant-Smi switches.
-  void GenerateFastCaseSwitchStatement(SwitchStatement* node,
-                                       int min_index,
-                                       int range,
-                                       int default_index);
-
-  // Fast support for constant-Smi switches. Tests whether switch statement
-  // permits optimization and calls GenerateFastCaseSwitch if it does.
-  // Returns true if the fast-case switch was generated, and false if not.
-  bool TryGenerateFastCaseSwitchStatement(SwitchStatement* node);
-
   // Methods used to indicate which source code is generated for. Source
   // positions are collected by the assembler and emitted with the relocation
   // information.
   void CodeForFunctionPosition(FunctionLiteral* fun);
   void CodeForReturnPosition(FunctionLiteral* fun);
   void CodeForStatementPosition(Node* node);
   void CodeForSourcePosition(int pos);
 
 #ifdef DEBUG
   // True if the registers are valid for entry to a block.  There should
@@ skipping 37 matching lines @@
   friend class Reference;
   friend class Result;
 
   DISALLOW_COPY_AND_ASSIGN(CodeGenerator);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_X64_CODEGEN_X64_H_