[Bug 80037] i965: Figure out how to remove copy-propagated MOV x, (abs)x

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=80037

--- Comment #1 from Iago Toral <itoral at igalia.com> ---
(In reply to comment #0)
> 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

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?

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