https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81907
--- Comment #13 from dongkyun.s at samsung dot com --- > Confirmed the call on 6.4.1 but GCC 7 and trunk don't generate the call for > -mcpu=cortex-a9 . I also verified memset call is not generated with GCC 7.1 + "-mcpu=cortex-a9 or -mtune=cortex-a9" or lower. It seems interesting that in GCC6, - don't generate the memset call for -mcpu=cortex-a12 or higer(e.g, cortex-a15, V7 big.LITTLE) - always generate the memset call for -mcpu=cortex-a9 or lower(e.g, cortex-a7, cotex-a5) in GCC7.1 - always don't generate the memset call (even with V3 Architecture Processors. e.g, -mcpu=arm7)
