https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85410

--- Comment #3 from Arseny Solokha <asolokha at gmx dot com> ---
Testcase from #c2 doesn't fail for me anymore w/ the current trunk snapshot (as
of r265361), but the following one does:

int py, up;

void
ro (int *tr, int et)
{
  while (et < 1)
    {
      int s7 = !!*tr ? 0 : py;

      if (s7 != 0)
        {
        }
      else
        {
          up /= 2;

          if (py * py == 0)
            tr = &py;
        }

      ++et;
    }
}

% x86_64-unknown-linux-gnu-gcc-9.0.0-alpha20181021 -O1 -fschedule-insns
-fsel-sched-pipelining -fselective-scheduling -fvar-tracking-assignments
-fno-if-conversion -fno-tree-loop-im -w -c ebmjprna.c
during RTL pass: sched1
ebmjprna.c: In function 'ro':
ebmjprna.c:23:1: internal compiler error: in create_block_for_bookkeeping, at
sel-sched.c:4563
   23 | }
      | ^
0x65a9e8 create_block_for_bookkeeping
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181021/work/gcc-9-20181021/gcc/sel-sched.c:4563
0x65a9e8 find_place_for_bookkeeping
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181021/work/gcc-9-20181021/gcc/sel-sched.c:4700
0x65a9e8 generate_bookkeeping_insn
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181021/work/gcc-9-20181021/gcc/sel-sched.c:4800
0x65a9e8 move_op_at_first_insn
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181021/work/gcc-9-20181021/gcc/sel-sched.c:6077
0xc9016c code_motion_path_driver
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181021/work/gcc-9-20181021/gcc/sel-sched.c:6669
0xc90516 code_motion_process_successors
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181021/work/gcc-9-20181021/gcc/sel-sched.c:6356
0xc90516 code_motion_path_driver
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181021/work/gcc-9-20181021/gcc/sel-sched.c:6622
0xc90516 code_motion_process_successors
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181021/work/gcc-9-20181021/gcc/sel-sched.c:6356
0xc90516 code_motion_path_driver
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181021/work/gcc-9-20181021/gcc/sel-sched.c:6622
0xc93292 move_op
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181021/work/gcc-9-20181021/gcc/sel-sched.c:6714
0xc93292 move_exprs_to_boundary
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181021/work/gcc-9-20181021/gcc/sel-sched.c:5237
0xc93292 schedule_expr_on_boundary
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181021/work/gcc-9-20181021/gcc/sel-sched.c:5450
0xc951cc fill_insns
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181021/work/gcc-9-20181021/gcc/sel-sched.c:5592
0xc951cc schedule_on_fences
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181021/work/gcc-9-20181021/gcc/sel-sched.c:7366
0xc951cc sel_sched_region_2
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181021/work/gcc-9-20181021/gcc/sel-sched.c:7504
0xc96a56 sel_sched_region_1
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181021/work/gcc-9-20181021/gcc/sel-sched.c:7546
0xc9822e sel_sched_region(int)
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181021/work/gcc-9-20181021/gcc/sel-sched.c:7647
0xc9822e sel_sched_region(int)
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181021/work/gcc-9-20181021/gcc/sel-sched.c:7632
0xc99141 run_selective_scheduling()
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181021/work/gcc-9-20181021/gcc/sel-sched.c:7733
0xc78edd rest_of_handle_sched
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181021/work/gcc-9-20181021/gcc/sched-rgn.c:3718

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