* gcc-interface/ada-tree.h (DECL_FORCED_BY_REF_P): New macro.
	* gcc-interface/decl.c (gnat_to_gnu_param): Set it on parameters
	whose mechanism was forced to by-reference.
	* gcc-interface/trans.c (Call_to_gnu): Do not issue a warning about a
	misaligned actual parameter if it is based on a CONSTRUCTOR.  Remove
 	obsolete warning for users of Starlet.  Issue a warning if a temporary
	is make around the call for a parameter with DECL_FORCED_BY_REF_P set.
	(addressable_p): Return true for REAL_CST and ADDR_EXPR.

From-SVN: r275198