v_0 := v.Args[0]
	b := v.Block
	// match: (MNEG x (MOVDconst [-1]))
	// result: x
	for {
		for _i0 := 0; _i0 <= 1; _i0, v_0, v_1 = _i0+1, v_1, v_0 {
			x := v_0
			if v_1.Op != OpARM64MOVDconst || auxIntToInt64(v_1.AuxInt) != -1 {
				continue
			}
			v.copyOf(x)
			return true
		}
		break
	}
	// match: (MNEG _ (MOVDconst [0]))
	// result: (MOVDconst [0])
	for {