[Bug c/101347] New: [11/12 Regression] ICE in cfg_layout_initialize, at cfgrtl.c:4478

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101347

            Bug ID: 101347
           Summary: [11/12 Regression] ICE in cfg_layout_initialize, at
                    cfgrtl.c:4478
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gscfq@t-online.de
  Target Milestone: ---

Testcase reduced from pr26983.c :
(seen with cet-sjlj-6a.c, cet-sjlj-6b.c, setjmp-1.c, pr26983.c)


$ cat z1.c
void *jmpbuf[6];
void
foo (void)
{
  __builtin_setjmp (jmpbuf);
}


$ gcc-12-20210704 -c z1.c -O2 -fprofile-generate -fprofile-use
z1.c: In function 'foo':
z1.c:6:1: warning: 'z1.gcda' profile count data file not found
[-Wmissing-profile]
    6 | }
      | ^
during RTL pass: into_cfglayout
z1.c:6:1: internal compiler error: Segmentation fault
0xdcbcdf crash_signal
        ../../gcc/toplev.c:328
0x8c9a5b cfg_layout_initialize(int)
        ../../gcc/cfgrtl.c:4478
0x8c9bba execute
        ../../gcc/cfgrtl.c:3685