https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85458
--- Comment #1 from John David Anglin <danglin at gcc dot gnu.org> ---
On linux with 8.2.1 20180729, we have:
spawn -ignore SIGHUP /home/dave/gnu/gcc/objdir/gcc/xgcc
-B/home/dave/gnu/gcc/objdir/gcc/
/home/dave/gnu/gcc/gcc/gcc/testsuite/gcc.dg/pr83480.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -O2 -g
-fselective-scheduling2 -ftree-vectorize -freorder-blocks-algorithm=simple
-fnon-call-exceptions -fno-guess-branch-probability -fno-peephole2
-fno-tree-sink -fno-tree-scev-cprop -S -o pr83480.s
/home/dave/gnu/gcc/gcc/gcc/testsuite/gcc.dg/pr83480.c: In function 'foo':
/home/dave/gnu/gcc/gcc/gcc/testsuite/gcc.dg/pr83480.c:29:6: warning: division
by zero [-Wdiv-by-zero]
during RTL pass: sched2
/home/dave/gnu/gcc/gcc/gcc/testsuite/gcc.dg/pr83480.c:32:1: internal compiler
error: in sel_target_adjust_priority, at sel-sched.c:3336
0x629eeb sel_target_adjust_priority
../../gcc/gcc/sel-sched.c:3336
0x629eeb fill_vec_av_set
../../gcc/gcc/sel-sched.c:3727
0x62b6cf fill_ready_list
../../gcc/gcc/sel-sched.c:4028
0x62b6cf find_best_expr
../../gcc/gcc/sel-sched.c:4388
0x62b6cf fill_insns
../../gcc/gcc/sel-sched.c:5549
0x62b6cf schedule_on_fences
../../gcc/gcc/sel-sched.c:7366
0x62b6cf sel_sched_region_2
../../gcc/gcc/sel-sched.c:7504
0x62db87 sel_sched_region_1
../../gcc/gcc/sel-sched.c:7546
0x62f777 sel_sched_region(int)
../../gcc/gcc/sel-sched.c:7647
0x630333 run_selective_scheduling()
../../gcc/gcc/sel-sched.c:7733
0x60e42f rest_of_handle_sched2
../../gcc/gcc/sched-rgn.c:3732
0x60e42f execute
../../gcc/gcc/sched-rgn.c:3876
