KeyedLoadIC should have same register spec as LoadIC.

src/x64/debug-x64.cc

 // Copyright 2012 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.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/assembler.h"
 #include "src/codegen.h"
@@ skipping 164 matching lines @@
   //  -- rcx    : name
   //  -- rdx    : receiver
   // -----------------------------------
   Generate_DebugBreakCallHelper(
       masm, rax.bit() | rcx.bit() | rdx.bit(), 0, false);
 }
 
 
 void DebugCodegen::GenerateKeyedLoadICDebugBreak(MacroAssembler* masm) {
   // Register state for keyed IC load call (from ic-x64.cc).
-  Register receiver = KeyedLoadIC::ReceiverRegister();
-  Register name = KeyedLoadIC::NameRegister();
-  Generate_DebugBreakCallHelper(masm, receiver.bit() | name.bit(), 0, false);
+  GenerateLoadICDebugBreak(masm);
 }
 
 
 void DebugCodegen::GenerateKeyedStoreICDebugBreak(MacroAssembler* masm) {
   // Register state for keyed IC load call (from ic-x64.cc).
   // ----------- S t a t e -------------
   //  -- rax    : value
   //  -- rcx    : key
   //  -- rdx    : receiver
   // -----------------------------------
@@ skipping 105 matching lines @@
   __ jmp(rdx);
 }
 
 const bool LiveEdit::kFrameDropperSupported = true;
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64