[Bug c++/122968] bitfields do not have a location

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122968

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
At -O0 -g on the trunk:
```
        .long   .LASF5        # DW_AT_name: "a_var"
        .byte   0x1   # DW_AT_decl_file (/app/example.cpp)
        .byte   0x9   # DW_AT_decl_line
        .byte   0xc   # DW_AT_decl_column
        .long   0x10a # DW_AT_type
        .uleb128 0x3    # DW_AT_location
        .byte   0x91  # DW_OP_fbreg
        .sleb128 -24
        .byte   0x6   # DW_OP_deref
        .uleb128 0xd    # (DIE (0xdd) DW_TAG_variable)
        .long   .LASF6        # DW_AT_name: "b_var"
        .byte   0x1   # DW_AT_decl_file (/app/example.cpp)
        .byte   0x9   # DW_AT_decl_line
        .byte   0x13  # DW_AT_decl_column
        .long   0x111 # DW_AT_type
        .uleb128 0xe    # (DIE (0xe9) DW_TAG_variable)
```

There is one for a_var now but not one for b_var.