[Bug rtl-optimization/98334] Failure to optimally optimize add loop to mul

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98334

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |13.0

--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #5)
> Fixed at the RTL level, keeping open for the GIMPLE optimization.

For the testcase in comment #1 this is recorded as PR 94782.

For the original testcase in comment #0, I don't know when it was fixed on the
trunk but in sccp we get now:

final value replacement:
  result_2 = PHI <result_7(3)>
 with expr: (int) n_4(D) * i_6(D)
 final stmt:
  result_2 = _1 * i_6(D);

instead of:

final value replacement:
  result_2 = PHI <result_7(3)>
 with expr: (int) (n_3(D) + 4294967295) * i_6(D) + i_6(D)
 final stmt:
  result_2 = _9 + i_6(D);