https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61886
--- Comment #39 from Jan Hubicka <hubicka at gcc dot gnu.org> --- Author: hubicka Date: Mon Dec 7 17:36:54 2015 New Revision: 231373 URL: https://gcc.gnu.org/viewcvs?rev=231373&root=gcc&view=rev Log: PR ipa/61886 * symtab.c (ultimate_transparent_alias_target): New inline function. (symbol_table::assembler_names_equal_p): New method; break out from ... (symbol_table::decl_assembler_name_equal): ... here. (symbol_table::change_decl_assembler_name): Also update names and translation links of transparent aliases. (symtab_node::dump_base): Dump transparent_alias. (symtab_node::verify_base): Implement basic transparent alias verification. (symtab_node::make_decl_local): Support localization of weakrefs; recurse to transparent aliases; set TREE_STATIC. (symtab_node::ultimate_alias_target_1): Handle visibility of transparent aliases. (symtab_node::resolve_alias): New parmaeter transparent; handle transparent aliases; recurse to aliases of aliases to fix comdat groups. (symtab_node::get_partitioning_class): Handle transparent aliases. * ipa-visibility.c (cgraph_externally_visible_p, varpool_node::externally_visible_p): Visibility of transparent alias depends on its target. (function_and_variable_visibility): Do not tweak visibility of transparent laiases. (function_and_variable_visibility): Likewise. * ipa.c (symbol_table::remove_unreachable_nodes): Clear transparent_alias flag. * alias.c (cgraph_node::create_alias, cgraph_node::get_availability): Support transparent aliases. * cgraph.h (symtab_node): Update prototype of resolve_alias; add transparent_alias flag. (symbol_table: Add assembler_names_equal_p. (symtab_node::real_symbol_p): Skip transparent aliases. * cgraphunit.c (cgraph_node::reset): Reset transparent_alias flag. (handle_alias_pairs): Set transparent_alias for weakref. (cgraph_node::assemble_thunks_and_aliases): Do not asemble transparent aliases. * lto-cgraph.c (lto_output_node): When outputting same_comdat_group skip symbols not put into boundary; stream transparent_alias. (lto_output_varpool_node): Likewise. (input_overwrite_node, input_varpool_node): Stream transparent alias. * varpool.c (ctor_for_folding, varpool_node::get_availability, varpool_node::assemble_aliases, symbol_table::remove_unreferenced_decls): Handle transparent aliase. (varpool_node::create_alias): Set transparent_alias. * lto-partition.c (add_symbol_to_partition_1, contained_in_symbol, rename_statics, rename_statics): Handle transparent aliases. Modified: trunk/gcc/ChangeLog trunk/gcc/cgraph.c trunk/gcc/cgraph.h trunk/gcc/cgraphunit.c trunk/gcc/ipa-visibility.c trunk/gcc/ipa.c trunk/gcc/lto-cgraph.c trunk/gcc/lto/ChangeLog trunk/gcc/lto/lto-partition.c trunk/gcc/symtab.c trunk/gcc/tree.c trunk/gcc/varpool.c
