[Bug 34266] Division by zero in shader results in NaNs

http://bugs.winehq.org/show_bug.cgi?id=34266

--- Comment #1 from Andrew Church  2013-08-15 05:50:55 CDT ---
Created attachment 45620
  --> http://bugs.winehq.org/attachment.cgi?id=45620
Generated GLSL source of bad shader

For reference, this shader was responsible for most of the black squares
visible in the current FFXIV:ARR benchmark.  The problematic instruction is
line 66: R0.z = (1.0 / R2.w) where R2 is an RGBA value read from a texture.