[cmucl-imp] Re: Static array support

[Lynn Quam]

How do you make a declaration to get good inline compiled references to 
the proposed static-array that are non-simple arrays indirected thru a 
header?  Am I missing something?



Madhu wrote:
> * Carl Shapiro Wrote on Tue, 1 Dec 2009 18:36:56 -0800:
>
> |> The compiled code would always assume that the array was non-simple,
> |> and indirect thru the array header to find underlying array.  I do
> |> not remember all of the details and limitations, except that the
> |> underling simple-vector could always be found with only one
> |> indirection.
> |
> | If an array is not simple it may be displaced.  In this case, one has
> | to chase the through all of underlying arrays until a terminal simple
> | array is found.  It would be nice if there was a way to never pay for
> | a displaced array if you never use them.
>
> Is there really a cost here if the array is simple and you are chasing
> only one level?  I thought your arguments in advocating the costs of
> multi-byte encodings would apply to this case.
>
> --
> Madhu
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