[RTL-ifcvt] PR rtl-optimization/67749: Do not emit separate SET insn in IF-ELSE case

[RTL-ifcvt] PR rtl-optimization/67749: Do not emit separate SET insn in IF-ELSE case

	PR rtl-optimization/67749
	* ifcvt.c (noce_try_cmove_arith): Do not emit move in IF-ELSE
	case before emitting the two blocks.  Instead modify the register
	in the corresponding final insn of the basic block.

From-SVN: r230014