Pass key and receiver in registers for keyed load IC on ARM...

src/arm/virtual-frame-arm.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 298 matching lines @@
                      int arg_count);
 
   // Call load IC. Receiver is on the stack. Result is returned in r0.
   void CallLoadIC(Handle<String> name, RelocInfo::Mode mode);
 
   // Call store IC. If the load is contextual, value is found on top of the
   // frame. If not, value and receiver are on the frame. Both are consumed.
   // Result is returned in r0.
   void CallStoreIC(Handle<String> name, bool is_contextual);
 
-  // Call keyed load IC. Key and receiver are on the stack. Result is returned
-  // in r0.
+  // Call keyed load IC. Key and receiver are on the stack. Both are consumed.
+  // Result is returned in r0.
   void CallKeyedLoadIC();
 
   // Call keyed store IC. Key and receiver are on the stack and the value is in
   // r0. Result is returned in r0.
   void CallKeyedStoreIC();
 
   // Call into an IC stub given the number of arguments it removes
   // from the stack.  Register arguments to the IC stub are implicit,
   // and depend on the type of IC stub.
   void CallCodeObject(Handle<Code> ic,
@@ skipping 17 matching lines @@
   // so you can't hold on to it if you push on the stack.
   Register PopToRegister(Register but_not_to_this_one = no_reg);
 
   // Look at the top of the stack.  The register returned is aliased and
   // must be copied to a scratch register before modification.
   Register Peek();
 
   // Duplicate the top of stack.
   void Dup();
 
+  // Duplicate the two elements on top of stack.
+  void Dup2();
+
   // Flushes all registers, but it puts a copy of the top-of-stack in r0.
   void SpillAllButCopyTOSToR0();
 
   // Flushes all registers, but it puts a copy of the top-of-stack in r1
   // and the next value on the stack in r0.
   void SpillAllButCopyTOSToR1R0();
 
   // Pop and save an element from the top of the expression stack and
   // emit a corresponding pop instruction.
   void EmitPop(Register reg);
@@ skipping 126 matching lines @@
   inline bool Equals(VirtualFrame* other);
 
   friend class JumpTarget;
   friend class DeferredCode;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_VIRTUAL_FRAME_ARM_H_