Revert
	2015-11-27  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

	* ifcvt.c (insn_valid_noce_process_p): Reject insn if it satisfies
	multiple_sets.
	(noce_try_cmove_arith): Add checking asserts that orig_a and orig_b
	are not modified by the final modified insns in the basic blocks.

From-SVN: r231019