[Bug c++/115599] ICE: qsort checking failed during GIMPLE pass: reassoc (error: qsort comparator non-negative on sorted output: 150142972)

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115599

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2024-06-23
           Keywords|                            |ice-checking,
                   |                            |missed-optimization
           Assignee|unassigned at gcc dot gnu.org      |rguenth at gcc dot 
gnu.org
             Status|UNCONFIRMED                 |ASSIGNED
     Ever confirmed|0                           |1

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
It's compare_repeat_factors

(gdb) p (*repeat_factor_vec.m_vec)[0]
$6 = (repeat_factor &) @0x5d6a7b8: {factor = <ssa_name 0x7ffff3396a20 36814>, 
  rank = 2147549184, count = 1, repr = <tree 0x0>}
(gdb) p (*repeat_factor_vec.m_vec)[4]
$7 = (repeat_factor &) @0x5d6a838: {factor = <ssa_name 0x7ffff33db8b8 15299>, 
  rank = 1, count = 1, repr = <tree 0x0>}

where one obvious issue might be that rank is unsigned (and count is
int64).

I'm testing a fix.

Note this bug only results in less optimal code.