[Mesa-dev] [Bug 105670] [regression][hang] Trine1EE hangs GPU after loading screen on Mesa3D-17.3 and later

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105670

--- Comment #11 from Gert Wollny <gw.fossdev at gmail.com> ---
The if statement can be be true because  

   tmp0.w = (R3.w >= 0.0 ? abs(ps_lc18.w) : abs(ps_lc18.y));

with ps_lc18.y = -1 and ps_lc18.w = 0.0, and then 

   R3.w = (tmp0.w);
   R3.w = (R5.w * R3.w);

which means at this point R3.w can be zero.

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