y := v_1
		v.reset(OpInt64Make)
		v0 := b.NewValue0(v.Pos, OpAdd32withcarry, typ.Int32)
		v1 := b.NewValue0(v.Pos, OpInt64Hi, typ.UInt32)
		v1.AddArg(x)
		v2 := b.NewValue0(v.Pos, OpInt64Hi, typ.UInt32)
		v2.AddArg(y)
		v3 := b.NewValue0(v.Pos, OpSelect1, types.TypeFlags)
		v4 := b.NewValue0(v.Pos, OpAdd32carry, types.NewTuple(typ.UInt32, types.TypeFlags))
		v5 := b.NewValue0(v.Pos, OpInt64Lo, typ.UInt32)
		v5.AddArg(x)

func (s *regAllocState) clobberRegs(m regMask) {
	m &= s.allocatable & s.f.Config.gpRegMask // only integer register can contain pointers, only clobber them
	for m != 0 {
		r := pickReg(m)
		m &^= 1 << r
		x := s.curBlock.NewValue0(src.NoXPos, OpClobberReg, types.TypeVoid)
		s.f.setHome(x, &s.registers[r])
	}
}

// setOrig records that c's original value is the same as
// v's original value.