c-common.c (c_get_alias_set): Tighten slightly for FUNCTION_TYPEs and ARRAY_TYPEs.

c-common.c (c_get_alias_set): Tighten slightly for FUNCTION_TYPEs and ARRAY_TYPEs.

	* c-common.c (c_get_alias_set): Tighten slightly for FUNCTION_TYPEs
	and ARRAY_TYPEs.  Tidy up.  Improve support for type-punning.
	* expr.c (store_field): Add alias_set parameter.  Set the
	MEM_ALIAS_SET accordingly, if the target is a MEM.
	(expand_assignment): Use it.
	(store_constructor_field): Pass 0.
	(expand_expr): Likewise.

From-SVN: r22620