107260cc29
This caused ZT0 to be preserved around `__arm_tpidr2_save` in functions with "aarch64_new_zt0". The block in which `__arm_tpidr2_save` is called is added by the SMEABIPass and may be reachable in cases where ZA has not been enabled* (so using `str zt0` is invalid). * (when za_save_buffer is null and num_za_save_slices is zero)