[Bug c/83640] New: ice in generic_overlap, at gimple-ssa-warn-restrict.c:814

[dcb314 at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83640

            Bug ID: 83640
           Summary: ice in generic_overlap, at
                    gimple-ssa-warn-restrict.c:814
           Product: gcc
           Version: 8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dcb314 at hotmail dot com
  Target Milestone: ---

Created attachment 42994
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42994&action=edit
C source code

For the attached code, compiled with flags -c -O2 -Wall, recent gcc trunk
does this:

$ ../results/bin/gcc -c -O2 -Wall bug407.c
during GIMPLE pass: wrestrict
/home/dcb/rpmbuild/BUILD/trace-cmd-v2.6.2/trace-output.c: In function
‘create_ev
ent_list_item.isra.10’:
/home/dcb/rpmbuild/BUILD/trace-cmd-v2.6.2/trace-output.c:541:1: internal
compile
r error: in generic_overlap, at gimple-ssa-warn-restrict.c:814
 create_event_list_item(struct tracecmd_output *handle,
 ^~~~~~~~~~~~~~~~~~~~~~
0xbd9be7 generic_overlap
        ../../trunk/gcc/gimple-ssa-warn-restrict.c:814
0xbde88c overlap
        ../../trunk/gcc/gimple-ssa-warn-restrict.c:1198

I will have a go at reducing the code and finding a range
of revisions for this bug.