[Bug tree-optimization/121418] Missed copy prop for aggregate after a memcpy

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121418

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Blocks|                            |121364
   Last reconfirmed|                            |2025-08-05
             Status|UNCONFIRMED                 |ASSIGNED
     Ever confirmed|0                           |1

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
```
  vD.78477 = bD.78466;
  MEM <unsigned charD.27[16]> [(charD.7 * {ref-all})&D.78552] = MEM <unsigned
charD.27[16]> [(charD.7 * {ref-all})&vD.78477];
  vD.78477 ={v} {CLOBBER(eos)};
  vD.78480 = D.78552;
```

Note the above case needs PR 121417 first.


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121364
[Bug 121364] [meta-bug] copy prop for aggregates