// result: (MOVDreg x)
	for {
		x := v_0
		if x.Op != OpRISCV64SUBW {
			break
		}
		v.reset(OpRISCV64MOVDreg)
		v.AddArg(x)
		return true
	}
	// match: (MOVWreg x:(NEGW _))
	// result: (MOVDreg x)
	for {
		x := v_0
		if x.Op != OpRISCV64NEGW {
			break
		}
		v.reset(OpRISCV64MOVDreg)
		v.AddArg(x)
		return true
	}
	// match: (MOVWreg x:(MULW _ _))