[Bug fortran/83975] New: [8 Regression] ICE in set_parm_default_def_partition, at tree-ssa-coalesce.c:1919

[gs...@t-online.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83975

            Bug ID: 83975
           Summary: [8 Regression] ICE in set_parm_default_def_partition,
                    at tree-ssa-coalesce.c:1919
           Product: gcc
           Version: 8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gs...@t-online.de
  Target Milestone: ---

Changed between 20171217 and 20180107 :


$ cat z1.f90
subroutine s(x)
   character(*) :: x
   associate (y => x)
   end associate
end


$ gfortran-8-20171217 -c z1.f90
$
$ gfortran-8-20180121 -c z1.f90
during RTL pass: expand
z1.f90:1:0:

 subroutine s(x)

internal compiler error: in set_parm_default_def_partition, at
tree-ssa-coalesce.c:1919
0xc72efc set_parm_default_def_partition
        ../../gcc/tree-ssa-coalesce.c:1919
0xc72e07 for_all_parms
        ../../gcc/tree-ssa-coalesce.c:1023
0xc74798 get_parm_default_def_partitions(_var_map*)
        ../../gcc/tree-ssa-coalesce.c:1936
0xc2099b remove_ssa_form
        ../../gcc/tree-outof-ssa.c:971
0xc2099b rewrite_out_of_ssa(ssaexpand*)
        ../../gcc/tree-outof-ssa.c:1174
0x805810 execute
        ../../gcc/cfgexpand.c:6218