[Bug debug/82509] DW_AT_endianity issues with attribute scalar_storage_order

["ebotcazou at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82509

--- Comment #6 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Thu Oct 19 13:50:10 2017
New Revision: 253893

URL: https://gcc.gnu.org/viewcvs?rev=253893&root=gcc&view=rev
Log:
        PR debug/82509
        * dwarf2out.c (new_die_raw): New static inline function.
        (new_die): Use it to create the DIE.
        (add_AT_external_die_ref): Likewise.
        (clone_die): Likewise.
        (clone_as_declaration): Likewise.
        (dwarf2out_vms_debug_main_pointer): Likewise.
        (base_type_die): Likewise.  Remove early return for corner cases.
        Do not call add_pubtype on the DIE here.
        (is_base_type): Remove ERROR_MARK and return 0 for VOID_TYPE.
        (modified_type_die): Adjust the lookup for reverse order DIEs.  Skip
        typedefs for base types with DW_AT_endianity.  Make sure a DIE with
        native order exists for base types, attach the DIE manually and call
        add_pubtype on it.  Do not equate a reverse order DIE to the type.

Added:
    trunk/gcc/testsuite/gcc.dg/debug/dwarf2/sso-1.c
      - copied unchanged from r253848,
trunk/gcc/testsuite/gcc.dg/debug/dwarf2/sso.c
    trunk/gcc/testsuite/gcc.dg/debug/dwarf2/sso-2.c
    trunk/gcc/testsuite/gcc.dg/debug/dwarf2/sso-3.c
Removed:
    trunk/gcc/testsuite/gcc.dg/debug/dwarf2/sso.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/dwarf2out.c
    trunk/gcc/testsuite/ChangeLog