If multisample is enabled and alpha testing happens, the
branch can jump out of the fragment shader before the other
samples are generated. Just don't take the branch optimisation
post alpha test if multisample is enabled.
This should fix some rendering bugs in kicad with multisample
enabled.
Cc: mesa-stable
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17049>
Dave Airlie
6e5d126a65