[Bug target/81907] memset called when it does not need to be; -mtune=cortex-a9

[dongkyun.s at samsung dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81907

--- Comment #9 from dongkyun.s at samsung dot com ---
> or you mean this should be optimized not to use memset; different question from what your summary is about.

I mean -ffreestanding or -fno-freestanding are not included in this testcase,
but, mtune/ mcpu option.
Thanks!