Re: byte-opt.el addition - optimize list of compile-time constants

[Andreas Schwab]

Paul Pogonyshev <address@hidden> writes:

> Zack Weinberg wrote:
>> I seriously wonder how much would break if this optimization were
>> implemented for 'list'.  My suspicion is that people don't commonly
>> apply 'eq' to lists in the first place.
>
> You are very wrong here.  While it will hardly break sane code,
> `eq' is _very_ often applied to cons cells, e.g. lists.

Also 'list' is sometimes intentionally used to create a new cons that can
be changed by side effect.  If it were optimized to a constant the side
effect would now change a literal.

Andreas.

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Andreas Schwab, SuSE Labs, address@hidden
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