[Bug c/105952] New: [12/13 Regression] ICE in sel_redirect_edge_and_branch, at sel-sched-ir.cc:5680

["gscfq@t-online.de" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105952

            Bug ID: 105952
           Summary: [12/13 Regression] ICE in
                    sel_redirect_edge_and_branch, at sel-sched-ir.cc:5680
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gscfq@t-online.de
  Target Milestone: ---

Started between 20220306 and 20220327, affects file pr27531-1.c :
(gcc configured with --enable-checking=yes)


$ gcc-13-20220612 -c pr27531-1.c -O -fno-inline -fschedule-insns
-fselective-scheduling
during RTL pass: sched1
pr27531-1.c: In function 'main':
pr27531-1.c:59:1: internal compiler error: Segmentation fault
   59 | }
      | ^
0xe13ecf crash_signal
        ../../gcc/toplev.cc:322
0xdbd165 sel_redirect_edge_and_branch(edge_def*, basic_block_def*)
        ../../gcc/sel-sched-ir.cc:5680
0xdbe0a8 maybe_tidy_empty_bb
        ../../gcc/sel-sched-ir.cc:3804
0xdbec65 purge_empty_blocks()
        ../../gcc/sel-sched-ir.cc:3948
0xdd1b4c sel_sched_region_1
        ../../gcc/sel-sched.cc:7519
0xdd2ff0 sel_sched_region(int)
        ../../gcc/sel-sched.cc:7634
0xdd3899 run_selective_scheduling()
        ../../gcc/sel-sched.cc:7720
0xdafa1d rest_of_handle_sched
        ../../gcc/sched-rgn.cc:3720
0xdafa1d execute
        ../../gcc/sched-rgn.cc:3830