[Bug lto/61886] [4.9/5/6 Regression] LTO breaks fread with _FORTIFY_SOURCE=2

[hubicka at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61886

--- Comment #45 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Wed Dec  9 02:15:05 2015
New Revision: 231438

URL: https://gcc.gnu.org/viewcvs?rev=231438&root=gcc&view=rev
Log:


        PR ipa/61886
        * lto-streamer.h (lto_symtab_merge_decls, lto_symtab_merge_symbols,
        lto_symtab_prevailing_decl): MOve to lto-symtab.h.
        * lto-streamer-out.c (DFS::DFS_write_tree_body): Check that
        DECL_ABSTRACT_ORIGIN is not error_mark_node.

        * lto-symtab.c: Include lto-symtab.h.
        (lto_cgraph_replace_node): Do not merge profiles here.
        (lto_symtab_merge_p): New function.
        (lto_symtab_merge_decls_2): Honor lto_symtab_merge_p.
        (lto_symtab_merge_symbols_1): Turn unmerged decls into transparent
        aliases.
        (lto_symtab_merge_symbols): Do not clear node->aux; we no longer use
it.
        (lto_symtab_prevailing_decl): Move to lto-symtab.h; rewrite.
        * lto.c: Include lto-symtab.h
        * lto-symtab.h: New.

Added:
    trunk/gcc/lto/lto-symtab.h
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/lto-streamer-out.c
    trunk/gcc/lto-streamer.h
    trunk/gcc/lto/ChangeLog
    trunk/gcc/lto/lto-symtab.c
    trunk/gcc/lto/lto.c