718ef00ca4
Unlike the pinned set in VecRegAllocator which exists for the duration of an instruction, registers which are pinned in the main allocator are pinned until the register is freed. The pinned set in VecRegAllocator is initialized to a copy of the one in the main register allocator. Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29591>