[Mesa-dev] [Bug 29199] Using negation as an argument to a shader function sometimes negates twice

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=29199

--- Comment #1 from Neil Roberts <neil at linux.intel.com> 2010-07-21 11:41:33 PDT ---
Created an attachment (id=37276)
 View: https://bugs.freedesktop.org/attachment.cgi?id=37276
 Review: https://bugs.freedesktop.org/review?bug=29199&attachment=37276

Add a shader which does a negation as one of the arguments to dot

This is basically doing:

 vec3 a_vec;
 vec3 b_vec;
 /* some random calculations */
 float result = dot(-a_vec, b_vec);

But for some reason it currently gets compiled as if it was:

 vec3 a_vec;
 vec3 b_vec;
 /* some random calculations */
 float result = dot(--a_vec, b_vec);

Ie, the negation gets done twice.

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