PR rtl-optimization/52092
	* loop-unswitch.c (unswitch_single_loop): Call copy_rtx_if_shared
	on get_iv_value result.

	* gcc.c-torture/compile/pr52092.c: New test.

Co-Authored-By: Zdenek Dvorak <ook@ucw.cz>

From-SVN: r183869