Revert of [runtime] Turn ArgumentAccessStub into FastNewSloppyArgumentsStub.

src/full-codegen/x64/full-codegen-x64.cc

Index: src/full-codegen/x64/full-codegen-x64.cc
diff --git a/src/full-codegen/x64/full-codegen-x64.cc b/src/full-codegen/x64/full-codegen-x64.cc
index 5ad78bd30040ef37ca291ed8eedd45c63328617a..f2b59df585bc646e75389c7d2cf681d9b1d932c4 100644
--- a/src/full-codegen/x64/full-codegen-x64.cc
+++ b/src/full-codegen/x64/full-codegen-x64.cc
@@ -268,11 +268,23 @@
     if (is_strict(language_mode()) || !has_simple_parameters()) {
       FastNewStrictArgumentsStub stub(isolate());
       __ CallStub(&stub);
-    } else if (literal()->has_duplicate_parameters()) {
-      __ Push(rdi);
-      __ CallRuntime(Runtime::kNewSloppyArguments_Generic);
     } else {
-      FastNewSloppyArgumentsStub stub(isolate());
+      DCHECK(rdi.is(ArgumentsAccessNewDescriptor::function()));
+      // The receiver is just before the parameters on the caller's stack.
+      int num_parameters = info->scope()->num_parameters();
+      int offset = num_parameters * kPointerSize;
+      __ Move(ArgumentsAccessNewDescriptor::parameter_count(),
+              Smi::FromInt(num_parameters));
+      __ leap(ArgumentsAccessNewDescriptor::parameter_pointer(),
+              Operand(rbp, StandardFrameConstants::kCallerSPOffset + offset));
+
+      // Arguments to ArgumentsAccessStub:
+      //   function, parameter pointer, parameter count.
+      // The stub will rewrite parameter pointer and parameter count if the
+      // previous stack frame was an arguments adapter frame.
+      ArgumentsAccessStub::Type type = ArgumentsAccessStub::ComputeType(
+          literal()->has_duplicate_parameters());
+      ArgumentsAccessStub stub(isolate(), type);
       __ CallStub(&stub);
     }