https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104312

            Bug ID: 104312
           Summary: ICE with -ff2c in fold_convert_loc, at
                    fold-const.cc:2451
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gs...@t-online.de
  Target Milestone: ---

Affects versions down to at least r5 :


$ cat z1.f90
function f()
real, pointer :: f, e
entry e()
end


$ gfortran-12-20220130 -c z1.f90
$
$ gfortran-12-20220130 -c z1.f90 -ff2c
z1.f90:1:0:

    1 | function f()
      |
internal compiler error: in fold_convert_loc, at fold-const.cc:2451
0x9b68e7 fold_convert_loc(unsigned int, tree_node*, tree_node*)
        ../../gcc/fold-const.cc:2450
0xa3130d gimplify_modify_expr
        ../../gcc/gimplify.cc:5918
0xa2901a gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        ../../gcc/gimplify.cc:14963
0xa2bb48 gimplify_stmt(tree_node**, gimple**)
        ../../gcc/gimplify.cc:7035
0xa29306 gimplify_and_add(tree_node*, gimple**)
        ../../gcc/gimplify.cc:495
0xa29306 gimplify_return_expr
        ../../gcc/gimplify.cc:1677
0xa29306 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        ../../gcc/gimplify.cc:15225
0xa2bb48 gimplify_stmt(tree_node**, gimple**)
        ../../gcc/gimplify.cc:7035
0xa2c0a1 gimplify_bind_expr
        ../../gcc/gimplify.cc:1427
0xa2948a gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        ../../gcc/gimplify.cc:15164
0xa2bb48 gimplify_stmt(tree_node**, gimple**)
        ../../gcc/gimplify.cc:7035
0xa2cbcb gimplify_body(tree_node*, bool)
        ../../gcc/gimplify.cc:16209
0xa2d01f gimplify_function_tree(tree_node*)
        ../../gcc/gimplify.cc:16363
0x8b3147 cgraph_node::analyze()
        ../../gcc/cgraphunit.cc:675
0x8b5af7 analyze_functions
        ../../gcc/cgraphunit.cc:1240
0x8b64bd symbol_table::finalize_compilation_unit()
        ../../gcc/cgraphunit.cc:2500

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