[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

dongkyun.s at samsung dot com changed:

           What    |Removed                     |Added
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             Status|NEW                         |RESOLVED
         Resolution|---                         |WORKSFORME

--- Comment #18 from dongkyun.s at samsung dot com ---
Dear Michail,
Your analysis was very helpful. I've also verified that compiler may insert
memset() call or not according by 1) DSE optimization - object size/base and
tune options 2) code generation.