[llvm] r184105 - Switch spill weights from a basic loop depth estimation to BlockFrequencyInfo.

[Chandler Carruth]

This is really awesome.

On Mon, Jun 17, 2013 at 12:00 PM, Benjamin Kramer
<benny.kra at googlemail.com>wrote:

> This is good for a 5% speedup on zlib's deflate (x86_64), there were some
> very
> unfortunate spilling decisions in its hottest loop in longest_match().
>

Could you add some reduced form of this loop to the regression tests just
so we don't lose track of this loop structure going forward?
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