v_1 := v.Args[1]
	v_0 := v.Args[0]
	// match: (SUBW x (MOVDconst [0]))
	// result: (ADDIW [0] x)
	for {
		x := v_0
		if v_1.Op != OpRISCV64MOVDconst || auxIntToInt64(v_1.AuxInt) != 0 {
			break
		}
		v.reset(OpRISCV64ADDIW)
		v.AuxInt = int64ToAuxInt(0)
		v.AddArg(x)
		return true
	}
	// match: (SUBW (MOVDconst [0]) x)
	// result: (NEGW x)
	for {