[Bug tree-optimization/99954] [8/9/10 Regression] Copy loop over array of unions at -O3 generates memcpy instead of memmove, resulting in incorrect code

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99954

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to work|                            |11.0
            Summary|[8/9/10/11 Regression] Copy |[8/9/10 Regression] Copy
                   |loop over array of unions   |loop over array of unions
                   |at -O3 generates memcpy     |at -O3 generates memcpy
                   |instead of memmove,         |instead of memmove,
                   |resulting in incorrect code |resulting in incorrect code

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk sofar.