[llvm] r185024 - ARM: Proactively ensure that the LowerCallResult hack for 'this'-returns is not used for incompatible calling conventions.

[Stephen Lin]

> "Yes, but..." For this file that should work, however, there's a new
> and different doxygen style that's being used (and should be used)
> with \brief etc.
>
> I don't know what the consequences of mixing are here. I've just been
> following the existing style of the file. Someone else may though :)
>
> -eric

Ok, looks like \brief is not used in this file yet so I went with the
"///" style.

Committed as r185030.

Stephen