symtab_node *
symtab_nonoverwritable_alias (symtab_node *node)
{
tree new_decl;
symtab_node *new_node = NULL;
/* First try to look up existing alias or base object
(if that is already non-overwritable). */
node = symtab_alias_ultimate_target (node, NULL);
gcc_assert (!node->alias && !node->weakref);
symtab_for_node_and_aliases (node, symtab_nonoverwritable_alias_1,
(void *)&new_node, true);
if (new_node)
return new_node;
#ifndef ASM_OUTPUT_DEF
/* If aliases aren't supported by the assembler, fail. */
return NULL;
#endif
/* Otherwise create a new one. */
new_decl = copy_node (node->decl);
DECL_DLLIMPORT_P (new_decl) = 0;
DECL_NAME (new_decl) = clone_function_name (node->decl, "localalias");
if (TREE_CODE (new_decl) == FUNCTION_DECL)
DECL_STRUCT_FUNCTION (new_decl) = NULL;
DECL_INITIAL (new_decl) = NULL;
SET_DECL_ASSEMBLER_NAME (new_decl, DECL_NAME (new_decl));
SET_DECL_RTL (new_decl, NULL);
/* Update the properties. */
DECL_EXTERNAL (new_decl) = 0;
if (DECL_ONE_ONLY (node->decl))
DECL_SECTION_NAME (new_decl) = NULL;
DECL_COMDAT_GROUP (new_decl) = 0;
TREE_PUBLIC (new_decl) = 0;
DECL_COMDAT (new_decl) = 0;
DECL_WEAK (new_decl) = 0;
DECL_VIRTUAL_P (new_decl) = 0;
if (TREE_CODE (new_decl) == FUNCTION_DECL)
{
DECL_STATIC_CONSTRUCTOR (new_decl) = 0;
DECL_STATIC_DESTRUCTOR (new_decl) = 0;
new_node = cgraph_create_function_alias
(new_decl, node->decl);
}
else
new_node = varpool_create_variable_alias (new_decl,
node->decl);
symtab_resolve_alias (new_node, node);
gcc_assert (decl_binds_to_current_def_p (new_decl));
return new_node;
}
/* Make DECL local. FIXME: We shouldn't need to mess with rtl this early,
but other code such as notice_global_symbol generates rtl. */
void
symtab_make_decl_local (tree decl)
{
rtx rtl, symbol;
if (TREE_CODE (decl) == VAR_DECL)
DECL_COMMON (decl) = 0;
else gcc_assert (TREE_CODE (decl) == FUNCTION_DECL);
if (DECL_ONE_ONLY (decl) || DECL_COMDAT (decl))
{
/* It is possible that we are linking against library defining same COMDAT
function. To avoid conflict we need to rename our local name of the
function just in the case WHOPR partitioning decide to make it hidden
to avoid cross partition references. */
if (flag_wpa)
{
const char *old_name;
symtab_node node = symtab_get_node (decl);
old_name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
change_decl_assembler_name (decl,
clone_function_name (decl, "local"));
if (node->symbol.lto_file_data)
lto_record_renamed_decl (node->symbol.lto_file_data,
old_name,
IDENTIFIER_POINTER
(DECL_ASSEMBLER_NAME (decl)));
}
DECL_SECTION_NAME (decl) = 0;
DECL_COMDAT (decl) = 0;
}
DECL_COMDAT_GROUP (decl) = 0;
DECL_WEAK (decl) = 0;
DECL_EXTERNAL (decl) = 0;
TREE_PUBLIC (decl) = 0;
if (!DECL_RTL_SET_P (decl))
return;
/* Update rtl flags. */
make_decl_rtl (decl);
rtl = DECL_RTL (decl);
if (!MEM_P (rtl))
return;
symbol = XEXP (rtl, 0);
if (GET_CODE (symbol) != SYMBOL_REF)
return;
SYMBOL_REF_WEAK (symbol) = DECL_WEAK (decl);
}
symtab_node
symtab_nonoverwritable_alias (symtab_node node)
{
tree new_decl;
symtab_node new_node = NULL;
symtab_for_node_and_aliases (node, symtab_nonoverwritable_alias_1,
(void *)&new_node, true);
if (new_node)
return new_node;
new_decl = copy_node (node->symbol.decl);
DECL_NAME (new_decl) = clone_function_name (node->symbol.decl, "localalias");
if (TREE_CODE (new_decl) == FUNCTION_DECL)
DECL_STRUCT_FUNCTION (new_decl) = NULL;
DECL_INITIAL (new_decl) = NULL;
SET_DECL_ASSEMBLER_NAME (new_decl, DECL_NAME (new_decl));
SET_DECL_RTL (new_decl, NULL);
/* Update the properties. */
DECL_EXTERNAL (new_decl) = 0;
if (DECL_ONE_ONLY (node->symbol.decl))
DECL_SECTION_NAME (new_decl) = NULL;
DECL_COMDAT_GROUP (new_decl) = 0;
TREE_PUBLIC (new_decl) = 0;
DECL_COMDAT (new_decl) = 0;
DECL_WEAK (new_decl) = 0;
DECL_VIRTUAL_P (new_decl) = 0;
if (TREE_CODE (new_decl) == FUNCTION_DECL)
{
DECL_STATIC_CONSTRUCTOR (new_decl) = 0;
DECL_STATIC_DESTRUCTOR (new_decl) = 0;
new_node = (symtab_node) cgraph_create_function_alias (new_decl, node->symbol.decl);
}
else
new_node = (symtab_node) varpool_create_variable_alias (new_decl, node->symbol.decl);
symtab_resolve_alias (new_node, node);
return new_node;
}
