v.Aux = symToAux(mergeSym(sym1, sym2))
		v.AddArg2(x, y)
		return true
	}
	return false
}
func rewriteValue386_Op386MOVBLSX(v *Value) bool {
	v_0 := v.Args[0]
	b := v.Block
	// match: (MOVBLSX x:(MOVBload [off] {sym} ptr mem))
	// cond: x.Uses == 1 && clobber(x)
	// result: @x.Block (MOVBLSXload <v.Type> [off] {sym} ptr mem)
	for {
		x := v_0
		if x.Op != Op386MOVBload {
			break
		}