[CHKP] Never expand instrumentation thunks

[Jeff Law]

On 04/02/2015 03:13 PM, Jan Hubicka wrote:
>
> I think it is really the transparent alias issue.  The comment seems pretty clear about it.
> What is confusing is that instrumentation thunks are called thunks when they are
> really not - thunk is a small hunk of code, while instrumentation thunk is a transparent
> alias.
And it may be the terminology gets in the way.  I was at least partly 
interested in what code we generated for that testcase.

>
> Too bad I did not notice we introduced transparent aliases, i would push out my
> code for that. I will compare Ilya's changes with mine and hopefully we can
> catch more bugs and unify the code next stage1.
Sounds good.
jeff