[Bug tree-optimization/88019] [9 Regression] ICE in gimplify_modify_expr, at gimplify.c:5779

["rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88019

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |rguenth at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Ah well, the usual -ftrapv issue with COND_EXPRs.

#13 0x0000000000b2ff19 in create_empty_if_region_on_edge (
    entry_edge=<edge 0x7ffff6600420 (28 -> 33)>, 
    condition=<lt_expr 0x7ffff686fb68>)
    at /space/rguenther/src/gcc-slpcost/gcc/cfgloopmanip.c:704
(gdb) p debug_generic_expr (condition)
(if (graphite_IV.511_52 != 0)
  {
    iftmp.512 = _42 + -2;
  }
else
  {
    iftmp.512 = 0;
  }) < (graphite_IV.511_52 != 0 ? graphite_IV.511_52 /[ex] 4 + -2 : 0) + 1

the issue is the COND_EXPRs here.  That's fixable with
rewrite_to_non_trapping_overflow "easily".