Add a test for ArgumentsAccessStub::GenerateNewNonStrictSlow

src/a64/code-stubs-a64.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
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 // modification, are permitted provided that the following conditions are
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 //
 //     * Redistributions of source code must retain the above copyright
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@@ skipping 3211 matching lines @@
   __ TailCallRuntime(Runtime::kGetArgumentsProperty, 1, 1);
 }
 
 
 void ArgumentsAccessStub::GenerateNewNonStrictSlow(MacroAssembler* masm) {
   // Stack layout on entry.
   //  jssp[0]:  number of parameters (tagged)
   //  jssp[8]:  address of receiver argument
   //  jssp[16]: function
 
-  ASM_UNIMPLEMENTED("GenerateNewNonStrictSlow: This has not been tested.");
-
   // Check if the calling frame is an arguments adaptor frame.
   Label runtime;
   Register caller_fp = x10;
   __ Ldr(caller_fp, MemOperand(fp, StandardFrameConstants::kCallerFPOffset));
   // Load and untag the context.
   STATIC_ASSERT((kSmiShift / kBitsPerByte) == 4);
   __ Ldr(w11, MemOperand(caller_fp, StandardFrameConstants::kContextOffset +
                          (kSmiShift / kBitsPerByte)));
   __ Cmp(w11, StackFrame::ARGUMENTS_ADAPTOR);
   __ B(ne, &runtime);
@@ skipping 3820 matching lines @@
   __ Bind(&fast_elements_case);
   GenerateCase(masm, FAST_ELEMENTS);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_A64