[Bug lto/47247] Linker plugin specification makes it difficult to handle COMDATs

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47247

--- Comment #26 from Jan Hubicka <hubicka at gcc dot gnu.org> 2011-10-02 10:41:27 UTC ---
Author: hubicka
Date: Sun Oct  2 10:41:24 2011
New Revision: 179424

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=179424
Log:
    PR lto/47247
    * lto-plugin.c (get_symbols_v2): New variable.
    (write_resolution): Use V2 API when available.
    (onload): Handle LDPT_GET_SYMBOLS_V2.

    * lto-symtab.c (lto_symtab_resolve_symbols): Do not resolve
    when resolution is already availbale from plugin.
    (lto_symtab_merge_decls_1): Handle LDPR_PREVAILING_DEF_IRONLY_EXP.
    * cgraph.c (ld_plugin_symbol_resolution): Add prevailing_def_ironly_exp.
    * lto-cgraph.c (LDPR_NUM_KNOWN): Update.
    * ipa.c (varpool_externally_visible_p): IRONLY variables are never
    externally visible.
    * varasm.c (resolution_to_local_definition_p): Add
    LDPR_PREVAILING_DEF_IRONLY_EXP.
    (resolution_local_p): Likewise.

    * common.c (lto_resolution_str): Add new resolution.
    * common.h (lto_resolution_str): Likewise.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/cgraph.c
    trunk/gcc/ipa.c
    trunk/gcc/lto-cgraph.c
    trunk/gcc/lto-symtab.c
    trunk/gcc/lto/ChangeLog
    trunk/gcc/lto/common.c
    trunk/gcc/lto/common.h
    trunk/gcc/varasm.c
    trunk/lto-plugin/ChangeLog
    trunk/lto-plugin/lto-plugin.c