vec4: add a new test for issue 109759 and 110201
Explores optimisation that leads to: cmp.z.f0.0(8) g5<1>.yD g3<4>.xD 1D { align16 1Q }; (+f0.0.x) sel(8) g2<1>.xUD g8<4>.xUD 0x00000000UD { align16 1Q };
In case of incorrect optimization by intel vec4-backend invalid and random colors will be drawn. Test covers issues: Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=109759 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=110201 CC: Lionel G Landwerlin lionel.g.landwerlin@intel.com CC: Ian Romanick ian.d.romanick@intel.com Signed-off-by: Sergii Romantsov sergii.romantsov@globallogic.com