Change FastCharCodeAt to use a virtual frame.

src/jump-target.h

 // Copyright 2008 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 101 matching lines @@
   // All virtual frame pointers are copied, not the pointed-to frames.
   // The previous state of the destination is overwritten, without
   // deallocating pointed-to virtual frames.
   void CopyTo(JumpTarget* destination);
 
   // Emit a jump to the target.  There must be a current frame at the
   // jump and there will be no current frame after the jump.
   void Jump();
   void Jump(Result* arg);
   void Jump(Result* arg0, Result* arg1);
+  void Jump(Result* arg0, Result* arg1, Result* arg2);
 
   // Emit a conditional branch to the target.  There must be a current
   // frame at the branch.  The current frame will fall through to the
   // code after the branch.
   void Branch(Condition cc, Hint hint = no_hint);
   void Branch(Condition cc, Result* arg, Hint hint = no_hint);
   void Branch(Condition cc, Result* arg0, Result* arg1, Hint hint = no_hint);
+  void Branch(Condition cc,
+              Result* arg0,
+              Result* arg1,
+              Result* arg2,
+              Hint hint = no_hint);
+  void Branch(Condition cc,
+              Result* arg0,
+              Result* arg1,
+              Result* arg2,
+              Result* arg3,
+              Hint hint = no_hint);
 
   // Bind a jump target.  If there is no current frame at the binding
   // site, there must be at least one frame reaching via a forward
   // jump.  This frame will be used to establish an expected frame for
   // the block, which will be the current frame after the bind.
   void Bind();
   void Bind(Result* arg);
   void Bind(Result* arg0, Result* arg1);
+  void Bind(Result* arg0, Result* arg1, Result* arg2);
+  void Bind(Result* arg0, Result* arg1, Result* arg2, Result* arg3);
 
   // Emit a call to a jump target.  There must be a current frame at
   // the call.  The frame at the target is the same as the current
   // frame except for an extra return address on top of it.  The frame
   // after the call is the same as the frame before the call.
   void Call();
 
  protected:
   // The code generator gives access to its current frame.
   CodeGenerator* cgen_;
@@ skipping 65 matching lines @@
   bool is_shadowing_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(ShadowTarget);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_JUMP_TARGET_H_