[Interpreter] Remove register file register and replace with LoadParentFramePointer.

src/mips/interface-descriptors-mips.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.
 
 #if V8_TARGET_ARCH_MIPS
 
 #include "src/interface-descriptors.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 359 matching lines @@
       t0,  // call_data
       a2,  // holder
       a1,  // api_function_address
   };
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 void InterpreterDispatchDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {
-      kInterpreterAccumulatorRegister, kInterpreterRegisterFileRegister,
-      kInterpreterBytecodeOffsetRegister, kInterpreterBytecodeArrayRegister,
-      kInterpreterDispatchTableRegister};
+      kInterpreterAccumulatorRegister, kInterpreterBytecodeOffsetRegister,
+      kInterpreterBytecodeArrayRegister, kInterpreterDispatchTableRegister};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 void InterpreterPushArgsAndCallDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {
       a0,  // argument count (not including receiver)
       a2,  // address of first argument
       a1   // the target callable to be call
   };
@@ skipping 28 matching lines @@
       a1,  // the JSGeneratorObject to resume
       a2   // the resume mode (tagged)
   };
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS