* cgraph.c (cgraph_node::call_for_symbol_thunks_and_aliases):
	Check availability on NODE, too.
	* cgraph.h (symtab_node::call_for_symbol_and_aliases): Likewise.
	(cgraph_node::call_for_symbol_and_aliases): Likewise.
	(varpool_node::call_for_symbol_and_aliase): Likewise.
	* ipa-pure-const.c (add_new_function): Analyze all bodies.
	(propagate_pure_const): Propagate across interposable functions, too.
	(skip_function_for_local_pure_const): Do not skip interposable bodies
	with aliases.
	(pass_local_pure_const::execute): Update.

	* gcc.dg/ipa/pure-const-3.c: New testcase.

From-SVN: r235887