> The full barrier pattern membar_leon3 also gets generated so I think > that one should be kept also.
Do you have a testcase? membar is generated by sparc_emit_membar_for_model and, for the TSO model of LEON3, implied = StoreStore | LoadLoad | LoadStore so mm can only be StoreLoad, which means that membar_storeload will match so the full barrier never will. -- Eric Botcazou