[patch] Fix pr14893

[Rafael Espíndola]

Sorry, I did not include a variable rename in the test in the last patch.

On 26 January 2014 22:33, Rafael Espíndola <rafael.espindola at gmail.com> wrote:
> The root problem is that we were speculating a load and not dropping
> its range metadata. We know it is safe to speculate, but once we do we
> cannot say anything about the value we get out of the load.
>
> I noticed that there is not a convenient facility to drop all
> non-debug metadata. Is that intentional? From the old discussions, if
> I remember correctly, passes should drop metadata they know nothing
> about. Is that still the case or have we moved to a model where
> metadata is a proper part of the IR and passes have to know about it?
>
> Cheers,
> Rafael
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