// TODO(mdempsky): This seems out of place.
	if !ir.IsBlank(n.X) {
		types.CheckSize(n.X.Type()) // ensure width is calculated for backend
	}
}

func tcAssignList(n *ir.AssignListStmt) {
	if base.EnableTrace && base.Flag.LowerT {
		defer tracePrint("tcAssignList", n)(nil)
	}

	assign(n, n.Lhs, n.Rhs)
}

func assign(stmt ir.Node, lhs, rhs []ir.Node) {
	// delicate little dance.

		tcAssign(n)

		// Code that creates temps does not bother to set defn, so do it here.
		if n.X.Op() == ir.ONAME && ir.IsAutoTmp(n.X) {
			n.X.Name().Defn = n
		}
		return n

	case ir.OAS2:
		tcAssignList(n.(*ir.AssignListStmt))
		return n

	case ir.OBREAK,
		ir.OCONTINUE,
		ir.ODCL,
		ir.OGOTO,
		ir.OFALL:
		return n

	case ir.OBLOCK:
		n := n.(*ir.BlockStmt)
		Stmts(n.List)