[Bug tree-optimization/122016] [15/16 Regression] ICE: SSA corruption (Unable to coalesce ssa_names 4 and 18 which are marked as MUST COALESCE)

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122016

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|middle-end                  |tree-optimization
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2025-09-21
     Ever confirmed|0                           |1

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Working:
  <bb 7> [local count: 134164041]:
  i_18(ab) = i_2(ab) + 1;
  directory_exists ();

  <bb 8> [local count: 134110376]:
  _39 = i_18(ab) + 1;
  help_found_7 = help_found_26(ab);

failing case:
  <bb 7> [local count: 134164041]:
  i_18(ab) = i_2(ab) + 1;
  directory_exists ();

  <bb 8> [local count: 134110376]:
  _39 = i_18(ab) + 1;
  help_found_7 = help_found_26(ab);

Looks like PRE is doing it.