https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68811
--- Comment #3 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
The bug is that we can not prevail builtin decl refered by the global tables by
non-builtin. The following restores the previous behaviour of not merging.
Next stage1 I can clean this up finally.
Index: lto-symtab.c
===================================================================
--- lto-symtab.c (revision 231439)
+++ lto-symtab.c (working copy)
@@ -514,11 +514,9 @@ lto_symtab_merge_p (tree prevailing, tre
return false;
if (TREE_CODE (prevailing) == FUNCTION_DECL)
{
- if (DECL_BUILT_IN (prevailing) != DECL_BUILT_IN (decl))
- return false;
- if (DECL_BUILT_IN (prevailing)
- && (DECL_BUILT_IN_CLASS (prevailing) != DECL_BUILT_IN_CLASS (decl)
- || DECL_FUNCTION_CODE (prevailing) != DECL_FUNCTION_CODE (decl)))
+ /* Never merge bulitin declarations. Those are streamed specially
+ and already merged from the corresponding tables. */
+ if (DECL_BUILT_IN (prevailing) || DECL_BUILT_IN (decl))
return false;
}
/* There are several other cases where merging can not be done, but until
@@ -709,7 +707,7 @@ lto_symtab_merge_decls_1 (symtab_node *f
&& lto_symtab_symbol_p (e))
prevailing = e;
}
- /* For variables prefer the non-builtin if one is available. */
+ /* For functions prefer the non-builtin if one is available. */
else if (TREE_CODE (prevailing->decl) == FUNCTION_DECL)
{
for (e = first; e; e = e->next_sharing_asm_name)
