[Bug fortran/84244] New: [7/8 Regression] ICE in recompute_tree_invariant_for_addr_expr, at tree.c:4535

[gscfq@t-online.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84244

            Bug ID: 84244
           Summary: [7/8 Regression] ICE in
                    recompute_tree_invariant_for_addr_expr, at tree.c:4535
           Product: gcc
           Version: 8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gscfq@t-online.de
  Target Milestone: ---

Function f in z1.f90 is not used, z2.f90 without f compiles.
Changed between 20161218 and 20170108.


$ cat z1.f90
program p
   real, target :: a = 1.0
   type t
      real, pointer :: q
   end type
   type(t) :: z[*]
   z%q => a
contains
   function f(x)
      type(t), intent(in) :: x
   end
end


$ cat z2.f90
program p
   real, target :: a = 1.0
   type t
      real, pointer :: q
   end type
   type(t) :: z[*]
   z%q => a
end


$ gfortran-7-20161218 -c z1.f90 -fcoarray=lib
$
$ gfortran-8-20180204 -c z1.f90 -fcoarray=lib
z1.f90:11:0:

    end

internal compiler error: Segmentation fault
0xb953ff crash_signal
        ../../gcc/toplev.c:325
0xdca5d4 recompute_tree_invariant_for_addr_expr(tree_node*)
        ../../gcc/tree.c:4535
0xdca8c1 build1(tree_code, tree_node*, tree_node*)
        ../../gcc/tree.c:4635
0x92233c build1_loc
        ../../gcc/tree.h:4102
0x92233c fold_build1_loc(unsigned int, tree_code, tree_node*, tree_node*)
        ../../gcc/fold-const.c:12284
0x7497af gfc_build_addr_expr(tree_node*, tree_node*)
        ../../gcc/fortran/trans.c:298
0x75d208 structure_alloc_comps
        ../../gcc/fortran/trans-array.c:8782
0x76588e generate_coarray_sym_init
        ../../gcc/fortran/trans-decl.c:5369
0x7341cb do_traverse_symtree
        ../../gcc/fortran/symbol.c:4157
0x764a45 generate_coarray_init
        ../../gcc/fortran/trans-decl.c:5410
0x770bfc gfc_generate_function_code(gfc_namespace*)
        ../../gcc/fortran/trans-decl.c:6428
0x700040 translate_all_program_units
        ../../gcc/fortran/parse.c:6121
0x700040 gfc_parse_file()
        ../../gcc/fortran/parse.c:6324
0x74686f gfc_be_parse_file
        ../../gcc/fortran/f95-lang.c:204