A64: Synchronize with r17441.

src/a64/deoptimizer-a64.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 96 matching lines @@
   // There is no dynamic alignment padding on A64 in the input frame.
   return false;
 }
 
 
 void Deoptimizer::SetPlatformCompiledStubRegisters(
     FrameDescription* output_frame, CodeStubInterfaceDescriptor* descriptor) {
   ApiFunction function(descriptor->deoptimization_handler_);
   ExternalReference xref(&function, ExternalReference::BUILTIN_CALL, isolate_);
   intptr_t handler = reinterpret_cast<intptr_t>(xref.address());
-  int params = descriptor->register_param_count_;
-  if (descriptor->stack_parameter_count_ != NULL) {
-    params++;
-  }
+  int params = descriptor->environment_length();
   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) {
     double double_value = input_->GetDoubleRegister(i);
     output_frame->SetDoubleRegister(i, double_value);
   }
@@ skipping 234 matching lines @@
 
 
 void FrameDescription::SetCallerFp(unsigned offset, intptr_t value) {
   SetFrameSlot(offset, value);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal