re PR target/79080 (ICE: internal consistency failure (error: invalid rtl sharing found in the insn) (error: shared rtx))

	PR target/79080
	* loop-doloop.c (doloop_modify): Call unshare_all_rtl_in_chain on
	sequence.  Formatting fixes.
	(doloop_optimize): Formatting fixes.

	* gcc.dg/pr79080.c: New test.

From-SVN: r244506