[Bug tree-optimization/123967] Improve if-converted sequence on risc-v

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123967

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
  if (iftmp.0_16 != 0)
    goto <bb 11>; [50.00%]
  else
    goto <bb 12>; [50.00%]

  <bb 11> [local count: 233860967]:
  _13 = pretmp_41 | 1048576;
  goto <bb 13>; [100.00%]

  <bb 12> [local count: 233860967]:
  _15 = pretmp_41 & 4293918719;

  <bb 13> [local count: 467721934]:
  # _42 = PHI <_13(11), _15(12)>


I thought I saw this before ...