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| author | Jan Hubicka <hubicka@ucw.cz> | 2015-12-07 18:36:54 +0100 |
|---|---|---|
| committer | Jan Hubicka <hubicka@gcc.gnu.org> | 2015-12-07 17:36:54 +0000 |
| commit | 71e546870c4afb3c3ff993bd354a98637bcccdc7 (patch) | |
| tree | 88a2ecfa7b9a4506583492a38ea5179fc643bd39 /gcc/lto/lto-partition.c | |
| parent | 058c6384fe443310b1788dcdc8880beba24d6b43 (diff) | |
| download | gcc-71e546870c4afb3c3ff993bd354a98637bcccdc7.zip gcc-71e546870c4afb3c3ff993bd354a98637bcccdc7.tar.gz gcc-71e546870c4afb3c3ff993bd354a98637bcccdc7.tar.bz2 | |
re PR lto/61886 (LTO breaks fread with _FORTIFY_SOURCE=2)
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.
From-SVN: r231373
Diffstat (limited to 'gcc/lto/lto-partition.c')
| -rw-r--r-- | gcc/lto/lto-partition.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/gcc/lto/lto-partition.c b/gcc/lto/lto-partition.c index 4fd445f..ac1b618 100644 --- a/gcc/lto/lto-partition.c +++ b/gcc/lto/lto-partition.c @@ -1035,7 +1035,15 @@ rename_statics (lto_symtab_encoder_t encoder, symtab_node *node) /* Assign every symbol in the set that shares the same ASM name an unique mangled name. */ for (s = symtab_node::get_for_asmname (name); s;) - if (!s->externally_visible + if ((!s->externally_visible || s->weakref) + /* Transparent aliases having same name as target are renamed at a + time their target gets new name. Transparent aliases that use + separate assembler name require the name to be unique. */ + && (!s->transparent_alias || !s->definition || s->weakref + || !symbol_table::assembler_names_equal_p + (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (s->decl)), + IDENTIFIER_POINTER + (DECL_ASSEMBLER_NAME (s->get_alias_target()->decl)))) && ((s->real_symbol_p () && !DECL_EXTERNAL (node->decl) && !TREE_PUBLIC (node->decl)) |