[fpc-devel] Question on updating FPC packages
Marco van de Voort
fpc at pascalprogramming.org
Tue Oct 29 14:06:14 CET 2019
Op 2019-10-27 om 10:46 schreef Florian Klämpfl:
> Am 27.10.19 um 10:27 schrieb Michael Van Canneyt:
>> If you genuinely believe that micro-optimization changes can make a
>> Submit patches.
> As said: I am against applying them. Why? They clutter code and after
> all, they make assumptions about the current target which not might be
> always valid. And time testing them is much better spent in improving
> the compiler and then all code benefits. Another point: for example
> explicit inline increases normally code size (not always but often),
> so it is against the use of -Os. Applying inline manually on umpteen
> subroutines makes no sense. Better improve auto inlining.
Auto inlining is also no panacea. It only works with heuristics, and
is thus only as good as a formula of the heuristic.
Changing calling conventions, vectorizing, loops all complicates that,
and it will never be perfect, and a change here will lead to a problem
If you know a routine can evaluate to one instruction in most cases, I
don't see anything wrong with just marking it as such.
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