[Bug tree-optimization/121357] memset could be optimized better for structs that don't need to be in memory

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121357

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |enhancement
            Summary|Bad codegen when            |memset could be optimized
                   |generically 1-filling a     |better for structs that
                   |struct in C                 |don't need to be in memory
          Component|middle-end                  |tree-optimization

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
  _1 = __builtin_memset (&D.4595, 255, 8);
  takeit (MEM[(struct it *)_1]);
  D.4595 ={v} {CLOBBER(eos)};