[Bug 105271] WebGL2 shader crashes i965_dri.so 17.3.3

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105271

--- Comment #10 from Jason Ekstrand <jason at jlekstrand.net> ---
Getting a division by zero in constant propagation is trivial.  All we would
have to do is write a simple shader_runner test.  Getting it to only trigger in
NIR would be a bit trickier, but I think it could be done.  Now that NIR is the
only thing doing loop unrolling, we could do something like this:

int j = 0;
for (int i = 0; i < 4; i++)
   j += 42/i;

gl_FragColor.x = 255.0f / float(i);

That should do the trick.

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