This is used for RADV's bit size lowering. fossil-db (navi21): Totals from 4520 (5.69% of 79377) affected shaders: (no stat changes) Signed-off-by: Rhys Perry <pendingchaos02@gmail.com> Reviewed-by: Georg Lehmann <dadschoorse@gmail.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29242>