[Mesa-dev] [PATCH 16/16] i965: Convert CMP.GE -(abs)reg 0 -> CMP.Z reg 0.

[Matt Turner]

On Mon, Jan 19, 2015 at 8:08 PM, Ian Romanick <idr at freedesktop.org> wrote:
> On 01/19/2015 03:31 PM, Matt Turner wrote:
>> total instructions in shared programs: 5952059 -> 5951603 (-0.01%)
>> instructions in affected programs:     138812 -> 138356 (-0.33%)
>> GAINED:                                1
>> LOST:                                  0
>
> Does the "glsl: Rewrite (-abs(x) >= 0) as (x == 0)" patch in my
> bool-optimizations-v2 tree achieve the same thing?

I have a memory of writing that patch at some point in the past and
discovering that it wasn't able to get rid of everything because of
annoying tree grafting problems.