[Bug rtl-optimization/100080] missed optimization for dead code elimination at -O3 (vs. -O2)

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100080

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |missed-optimization
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2021-04-15
             Status|UNCONFIRMED                 |NEW
          Component|tree-optimization           |rtl-optimization
            Version|unknown                     |11.0

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.  At -O2 combine manages to drop the call to foo () (indirectly), at
-O3 it does not.  There's not much difference on the GIMPLE level