The IC exposes a register definition.

src/arm64/deoptimizer-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"
 
 #include "src/codegen.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen.h"
 #include "src/safepoint-table.h"
@@ skipping 75 matching lines @@
 
 
 bool Deoptimizer::HasAlignmentPadding(JSFunction* function) {
   // There is no dynamic alignment padding on ARM64 in the input frame.
   return false;
 }
 
 
 void Deoptimizer::SetPlatformCompiledStubRegisters(
     FrameDescription* output_frame, CodeStubInterfaceDescriptor* descriptor) {
-  ApiFunction function(descriptor->deoptimization_handler_);
+  ApiFunction function(descriptor->deoptimization_handler());
   ExternalReference xref(&function, ExternalReference::BUILTIN_CALL, isolate_);
   intptr_t handler = reinterpret_cast<intptr_t>(xref.address());
   int params = descriptor->GetHandlerParameterCount();
   output_frame->SetRegister(x0.code(), params);
   output_frame->SetRegister(x1.code(), handler);
 }
 
 
 void Deoptimizer::CopyDoubleRegisters(FrameDescription* output_frame) {
   for (int i = 0; i < DoubleRegister::kMaxNumRegisters; ++i) {
@@ skipping 269 matching lines @@
 
 void FrameDescription::SetCallerConstantPool(unsigned offset, intptr_t value) {
   // No out-of-line constant pool support.
   UNREACHABLE();
 }
 
 
 #undef __
 
 } }  // namespace v8::internal