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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - i965: Figure out how to remove copy-propagated MOV x, (abs)x"
href="https://bugs.freedesktop.org/show_bug.cgi?id=80037#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - i965: Figure out how to remove copy-propagated MOV x, (abs)x"
href="https://bugs.freedesktop.org/show_bug.cgi?id=80037">bug 80037</a>
from <span class="vcard"><a class="email" href="mailto:itoral@igalia.com" title="Iago Toral <itoral@igalia.com>"> <span class="fn">Iago Toral</span></a>
</span></b>
<pre>(In reply to <a href="show_bug.cgi?id=80037#c0">comment #0</a>)
<span class="quote">> Some psychonauts shaders do pow(abs(x), y), which generates
>
> mov vgrf10:F, |vgrf10|:F
> pow vgrf53:F, vgrf10:F, vgrf55:F
>
> We copy propagate from the MOV into the POW:
>
> mov vgrf10:F, |vgrf10|:F
> pow vgrf53:F, |vgrf10|:F, vgrf55:F</span >
This is not happening for me. What I get is something like this:
mov(8) g11<1>F (abs)g7<4,4,1>.xF
math pow(8) g13<1>F g11<8,8,1>F g12<8,8,1>F
This was on SNB... is abs copy propagation only happening for specific hardware
generations?</pre>
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