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[Bug rtl-optimization/80463] [6/7/8 Regression] ICE with -fselective-scheduling2 and -fvar-tracking-assignments


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80463

--- Comment #11 from Arseny Solokha <asolokha at gmx dot com> ---
How about this one? It makes only trunk gcc ICE, though.

short int t2;
int cd, aa, ft;

void
dh (void)
{
  int qs = 0;

  if (t2 < 1)
    {
      int bq = 0;

      while (bq < 1)
        {
        }

      while (t2 < 1)
        {
          if (t2 == 0)
            {
              bq = 0;
              cd = !!cd;
            }
          else
            {
              bq = 1;
              cd = bq > qs;
            }

          t2 += cd;
          bq = (t2 / qs) == bq;

          if (aa != ft)
            {
              qs %= 0;
              while (bq != 0)
                {
 ro:
                  ;
                }
            }

          ++t2;
        }

 ia:
      goto ro;
    }

  goto ia;
}

% gcc-8.0.0-alpha20180114 -O2 -fvar-tracking-assignments
-fselective-scheduling2 -ftree-loop-vectorize -fnon-call-exceptions
-fno-tree-vrp -fno-gcse-lm -fno-tree-loop-im -fno-reorder-blocks-and-partition
-fno-reorder-blocks -fno-move-loop-invariants -w -c rsd2aiem.c        
during RTL pass: sched2
rsd2aiem.c: In function 'dh':
rsd2aiem.c:51:1: internal compiler error: in
av_set_could_be_blocked_by_bookkeeping_p, at sel-sched.c:3622
 }
 ^
0x64ad85 av_set_could_be_blocked_by_bookkeeping_p
       
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180114/work/gcc-8-20180114/gcc/sel-sched.c:3622
0x64ad85 code_motion_process_successors
       
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180114/work/gcc-8-20180114/gcc/sel-sched.c:6395
0x64ad85 code_motion_path_driver
       
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180114/work/gcc-8-20180114/gcc/sel-sched.c:6617
0xc59886 code_motion_process_successors
       
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180114/work/gcc-8-20180114/gcc/sel-sched.c:6351
0xc59886 code_motion_path_driver
       
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180114/work/gcc-8-20180114/gcc/sel-sched.c:6617
0xc59886 code_motion_process_successors
       
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180114/work/gcc-8-20180114/gcc/sel-sched.c:6351
0xc59886 code_motion_path_driver
       
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180114/work/gcc-8-20180114/gcc/sel-sched.c:6617
0xc5aa5a find_used_regs
       
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180114/work/gcc-8-20180114/gcc/sel-sched.c:3283
0xc5aa5a collect_unavailable_regs_from_bnds
       
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180114/work/gcc-8-20180114/gcc/sel-sched.c:1598
0xc5aa5a find_best_reg_for_expr
       
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180114/work/gcc-8-20180114/gcc/sel-sched.c:1661
0xc5aa5a fill_vec_av_set
       
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180114/work/gcc-8-20180114/gcc/sel-sched.c:3797
0xc5da87 fill_ready_list
       
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180114/work/gcc-8-20180114/gcc/sel-sched.c:4027
0xc5da87 find_best_expr
       
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180114/work/gcc-8-20180114/gcc/sel-sched.c:4387
0xc5da87 fill_insns
       
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180114/work/gcc-8-20180114/gcc/sel-sched.c:5544
0xc5da87 schedule_on_fences
       
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180114/work/gcc-8-20180114/gcc/sel-sched.c:7361
0xc5da87 sel_sched_region_2
       
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180114/work/gcc-8-20180114/gcc/sel-sched.c:7499
0xc61737 sel_sched_region_1
       
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180114/work/gcc-8-20180114/gcc/sel-sched.c:7541
0xc61737 sel_sched_region(int)
       
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180114/work/gcc-8-20180114/gcc/sel-sched.c:7642
0xc627a8 run_selective_scheduling()
       
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180114/work/gcc-8-20180114/gcc/sel-sched.c:7718
0xc42625 rest_of_handle_sched2
       
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180114/work/gcc-8-20180114/gcc/sched-rgn.c:3729

(as of r256677)

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