base.Errorf("%v can't be allocated in Go; it is incomplete (or unallocatable)", call.Type().Elem())
		}
		var r ir.Node
		switch {
		case isAppendOfMake(call):
			// x = append(y, make([]T, y)...)
			r = extendSlice(call, init)
		case call.IsDDD:
			r = appendSlice(call, init) // also works for append(slice, string).
		default:
			r = walkAppend(call, init, as)
		}
		as.Y = r
		if r.Op() == ir.OAPPEND {

		*p = growslice(t, *p, n)
	}
}

// extendSlice extends a slice by n elements.
//
// Unlike Value.grow, which modifies the slice in place and
// does not change the length of the slice in place,
// extendSlice returns a new slice value with the length
// incremented by the number of specified elements.
func (v Value) extendSlice(n int) Value {
	v.mustBeExported()
	v.mustBe(Slice)