[Bug 105440] GEN7: rendering issue on citra

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105440

--- Comment #8 from Jason Ekstrand <jason at jlekstrand.net> ---
In the two dumps you provided, there's quite a few differences.  It would help
if we could narrow it down a bit and figure out which vertex shader is causing
the problem.  Hopefully, it's one of the small ones. :-)

I recommend putting a little check in try_coalesce in nir_lower_vec_to_movs.c
to look at shader->info.name return early for one shader at a time such as:

if (strcmp(shader->info.name, "GLSL8") == 0)
   return;

That way we can narrow it down to the exact shader that's causing problems. 
>From there, sometimes it's useful to narrow it down further with something like

if (strcmp(shader->info.name, "GLSL8") == 0) {
   static int i = 0;
   i++;
   if (i > 8 && i < 20)
      return;
}

Until you get down to the smallest change you can manage which still reproduces
the bug.

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