[llvm] r212837 - Simplify the raw_svector_ostream tweak from r212816

[Chandler Carruth]

On Fri, Jul 11, 2014 at 11:23 AM, Alp Toker <alp at nuanti.com> wrote:

> Simplify the raw_svector_ostream tweak from r212816
>
> The memcpy() and overlap helps didn't help much with timings, so clean up
> the change.
>
> The difference at this point is that we now leave growth of the storage
> buffer
> up to SmallVector's implementation:
>
>  -   OS.reserve(OS.capacity() * 2);
>  +   OS.reserve(OS.size() + 64);
>

Thanks for fixing this, but in the future, it would be a lot easier to
review this kind of patch by reverting the original and then re-applying
just the cleanup portion of the patch.

-Chandler
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