[Bug tree-optimization/121236] [16 Regression] Problems during GIMPLE pass: ifcvt

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121236

--- Comment #8 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
+  /* Remove the phi and move to the next phi arg if needed. */
+  if (phi == gsi_stmt (*pgsi))
+    remove_phi_node (pgsi, false);

Needs to be fixed too.

It should be something like:
  /* Move to the next phi if needed. */
  if (phi == gsi_stmt (*pgsi))
    gsi_next (pgsi);
  /* Remove the phi as it is no longer used.  */
  remove_phi_node (gsi_for_stmt (phi), false);