A64: Tidy up a couple of TODOs.

src/a64/code-stubs-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 4919 matching lines @@
 
   __ Bind(&double_elements);
   __ Ldr(x10, FieldMemOperand(array, JSObject::kElementsOffset));
   __ StoreNumberToDoubleElements(value, index_smi, x10, x11, d0, d1,
                                  &slow_elements);
   __ Ret();
 }
 
 
 void StubFailureTrampolineStub::Generate(MacroAssembler* masm) {
-  // TODO(jbramley): The ARM code leaves the (shifted) offset in r1. Why?
-  CEntryStub ces(1, kSaveFPRegs);
+  CEntryStub ces(1, fp_registers_ ? kSaveFPRegs : kDontSaveFPRegs);
   __ Call(ces.GetCode(masm->isolate()), RelocInfo::CODE_TARGET);
   int parameter_count_offset =
       StubFailureTrampolineFrame::kCallerStackParameterCountFrameOffset;
   __ Ldr(x1, MemOperand(fp, parameter_count_offset));
   if (function_mode_ == JS_FUNCTION_STUB_MODE) {
     __ Add(x1, x1, 1);
   }
   masm->LeaveFrame(StackFrame::STUB_FAILURE_TRAMPOLINE);
   __ Drop(x1);
   // Return to IC Miss stub, continuation still on stack.
@@ skipping 857 matching lines @@
                               MemOperand(fp, 6 * kPointerSize),
                               NULL);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_A64