Revert "Create a RegisterSpec class inside of the IC that provides:"

src/arm64/code-stubs-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/bootstrapper.h"
 #include "src/code-stubs.h"
@@ skipping 83 matching lines @@
     CodeStubInterfaceDescriptor* descriptor) {
   // x2: feedback vector
   // x3: call feedback slot
   static Register registers[] = { x2, x3 };
   descriptor->register_param_count_ = sizeof(registers) / sizeof(registers[0]);
   descriptor->register_params_ = registers;
   descriptor->deoptimization_handler_ = NULL;
 }
 
 
+void KeyedLoadGenericElementStub::InitializeInterfaceDescriptor(
+    CodeStubInterfaceDescriptor* descriptor) {
+  static Register registers[] = { x1, x0 };
+  descriptor->register_param_count_ = 2;
+  descriptor->register_params_ = registers;
+  descriptor->deoptimization_handler_ =
+      Runtime::FunctionForId(Runtime::kKeyedGetProperty)->entry;
+}
+
+
+void KeyedLoadFastElementStub::InitializeInterfaceDescriptor(
+    CodeStubInterfaceDescriptor* descriptor) {
+  // x1: receiver
+  // x0: key
+  static Register registers[] = { x1, x0 };
+  descriptor->register_param_count_ = sizeof(registers) / sizeof(registers[0]);
+  descriptor->register_params_ = registers;
+  descriptor->deoptimization_handler_ =
+      FUNCTION_ADDR(KeyedLoadIC_MissFromStubFailure);
+}
+
+
+void KeyedLoadDictionaryElementStub::InitializeInterfaceDescriptor(
+    CodeStubInterfaceDescriptor* descriptor) {
+  // x1: receiver
+  // x0: key
+  static Register registers[] = { x1, x0 };
+  descriptor->register_param_count_ = sizeof(registers) / sizeof(registers[0]);
+  descriptor->register_params_ = registers;
+  descriptor->deoptimization_handler_ =
+      FUNCTION_ADDR(KeyedLoadIC_MissFromStubFailure);
+}
+
+
 void RegExpConstructResultStub::InitializeInterfaceDescriptor(
     CodeStubInterfaceDescriptor* descriptor) {
   // x2: length
   // x1: index (of last match)
   // x0: string
   static Register registers[] = { x2, x1, x0 };
   descriptor->register_param_count_ = sizeof(registers) / sizeof(registers[0]);
   descriptor->register_params_ = registers;
   descriptor->deoptimization_handler_ =
       Runtime::FunctionForId(Runtime::kHiddenRegExpConstructResult)->entry;
@@ skipping 5398 matching lines @@
                               MemOperand(fp, 6 * kPointerSize),
                               NULL);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM64