Use IC register definitions in platform files.

src/arm64/stub-cache-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/ic-inl.h"
@@ skipping 1436 matching lines @@
 #undef __
 #define __ ACCESS_MASM(masm)
 
 void KeyedLoadStubCompiler::GenerateLoadDictionaryElement(
     MacroAssembler* masm) {
   // ---------- S t a t e --------------
   //  -- lr     : return address
   //  -- x0     : key
   //  -- x1     : receiver
   // -----------------------------------
+  ASSERT(x1.is(KeyedLoadIC::ReceiverRegister()));
+  ASSERT(x0.is(KeyedLoadIC::NameRegister()));
   Label slow, miss;
 
   Register result = x0;
   Register key = x0;
   Register receiver = x1;
 
   __ JumpIfNotSmi(key, &miss);
   __ Ldr(x4, FieldMemOperand(receiver, JSObject::kElementsOffset));
   __ LoadFromNumberDictionary(&slow, x4, key, result, x2, x3, x5, x6);
   __ Ret();
 
   __ Bind(&slow);
   __ IncrementCounter(
       masm->isolate()->counters()->keyed_load_external_array_slow(), 1, x2, x3);
   TailCallBuiltin(masm, Builtins::kKeyedLoadIC_Slow);
 
   // Miss case, call the runtime.
   __ Bind(&miss);
   TailCallBuiltin(masm, Builtins::kKeyedLoadIC_Miss);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM64