* ipa.c (cgraph_externally_visible_p, varpool_externally_visible_p):
	Local comdats are not externally visible.
	* symtab.c (dump_symtab_base): Dump externally visible.
	(verify_symtab_base): Verify back links in the symtab hash.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@200064 138bc75d-0d04-0410-961f-82ee72b054a4