[patch] Fix pr14893

[Manman Ren]

One nit:
+  /// Passes are required to drop metadata they don't understand. This in a
+  /// convenience method for passes that only know about debug info.

Should it be "This is a convenience method"?

Manman


On Sun, Jan 26, 2014 at 8:17 PM, Rafael Espíndola <
rafael.espindola at gmail.com> wrote:

> > Passes are still responsible for dropping it. I agree, however, that we
> need more-convenient facilities for this.
>
> OK. Updated patch attached.
>
> Cheers,
> Rafael
>
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