n.TypeWord = typeWord
	n.SrcRType = srcRType
	return typecheck.Expr(n)
}

// isMapClear checks if n is of the form:
//
//	for k := range m {
//		delete(m, k)
//	}
//
// where == for keys of map m is reflexive.
func isMapClear(n *ir.RangeStmt) bool {
	if base.Flag.N != 0 || base.Flag.Cfg.Instrumenting {
		return false
	}

	t := n.X.Type()

				r = ir.NewConvExpr(base.Pos, ir.OCONV, nil, r)
				r.SetType(types.Types[types.TSTRING])
				r = typecheck.Expr(r)
			}

			n.X = o.copyExpr(r)

		case k == types.TMAP:
			if isMapClear(n) {
				// Preserve the body of the map clear pattern so it can
				// be detected during walk. The loop body will not be used
				// when optimizing away the range loop to a runtime call.
				orderBody = false