n.SetType(types.Types[types.TUINTPTR])
		return n

	case ir.OCONVNOP:
		n := n.(*ir.ConvExpr)
		n.X = Expr(n.X)
		return n

	// statements
	case ir.OAS:
		n := n.(*ir.AssignStmt)
		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: