KeyedLoadIC should have same register spec as LoadIC.

src/arm64/debug-arm64.cc

 // Copyright 2013 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_ARM64
 
 #include "src/codegen.h"
 #include "src/debug.h"
@@ skipping 239 matching lines @@
   //  -- lr    : return address
   // -----------------------------------
   // Registers x0, x1, and x2 contain objects that need to be pushed on the
   // expression stack of the fake JS frame.
   Generate_DebugBreakCallHelper(masm, x0.Bit() | x1.Bit() | x2.Bit(), 0, x10);
 }
 
 
 void DebugCodegen::GenerateKeyedLoadICDebugBreak(MacroAssembler* masm) {
   // Calling convention for keyed IC load (from ic-arm.cc).
-  Register receiver = KeyedLoadIC::ReceiverRegister();
-  Register name = KeyedLoadIC::NameRegister();
-  Generate_DebugBreakCallHelper(masm, receiver.Bit() | name.Bit(), 0, x10);
+  GenerateLoadICDebugBreak(masm);
 }
 
 
 void DebugCodegen::GenerateKeyedStoreICDebugBreak(MacroAssembler* masm) {
   // ---------- S t a t e --------------
   //  -- x0     : value
   //  -- x1     : key
   //  -- x2     : receiver
   //  -- lr     : return address
   Generate_DebugBreakCallHelper(masm, x0.Bit() | x1.Bit() | x2.Bit(), 0, x10);
@@ skipping 101 matching lines @@
   // Re-run JSFunction, x1 is function, cp is context.
   __ Br(scratch);
 }
 
 
 const bool LiveEdit::kFrameDropperSupported = true;
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM64