* gcc-interface/ada-tree.h (LOOP_STMT_NO_UNROLL): New define.
	(LOOP_STMT_UNROLL): Likewise.
	(LOOP_STMT_NO_VECTOR): Likewise.
	(LOOP_STMT_VECTOR): Likewise.
	* gcc-interface/trans.c (struct loop_info_d): Replace label field
	with stmt field.
	(Pragma_to_gnu) <Pragma_Loop_Optimize>: New case.
	(Loop_Statement_to_gnu): Save the loop statement onto the stack
	instead of the label.
	(gnat_to_gnu) <N_Exit_Statement>: Retrieve the loop label.

From-SVN: r199281