[Bug lto/54709] [4.8 Regression] r191713 breaks Firefox build

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54709

--- Comment #12 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-09-27 09:11:23 UTC ---
Author: rguenth
Date: Thu Sep 27 09:11:18 2012
New Revision: 191798

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=191798
Log:
2012-09-27  Richard Guenther  <rguenther@suse.de>

    PR lto/54709
    * lto-symtab.c (resolution_guessed_p): Remove.
    (set_resolution_guessed): Likewise.
    (lto_symtab_register_decl): Remove assert.
    (lto_symtab_resolve_symbols): Do not alter symbol resolutions
    and return the prevailing symbol, checking for multiple prevailing
    symbols here.
    (lto_symtab_merge_decls_1): Use the result from
    lto_symtab_resolve_symbols.  Do not alter symbol resolutions.

    * gcc.dg/lto/pr54709_0.c: New testcase.
    * gcc.dg/lto/pr54709_1.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.dg/lto/pr54709_0.c
    trunk/gcc/testsuite/gcc.dg/lto/pr54709_1.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/lto-symtab.c
    trunk/gcc/testsuite/ChangeLog