[Bug tree-optimization/121894] SRA (and DSE) vs. -ftrivial-auto-var-init=

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121894

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2025-09-10
           See Also|                            |https://gcc.gnu.org/bugzill
                   |                            |a/show_bug.cgi?id=36602
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
>  __builtin_memset (&s, 0, 32);
>into
>  __builtin_memset (&MEM <char> [(void *)&s + 8B], 0, 20);

I suspect if we change the memset to be 
MEM <char[32]> [(void *)&s] = {};

(This is PR 36602)

There is already code in DSE to handle the above triming off the first part.