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Postings from May 2012
On 05/16/2012 01:00 AM, Eric Brine wrote:
> On Mon, May 14, 2012 at 7:37 PM, Father Chrysostomos via RT
> <perlbug-followup@perl.org <mailto:perlbug-followup@perl.org>> wrote:
> > Replacing the entersub op with something else is what
> > cv_set_call_checker is for.
>
> I haven't found an example that removes from the opcode tree. How would
> I fill in the following call checker
Maybe still useful: pp_sort detects and removes the branches of the op
code tree that it can optimize with special purpose implementations of
sort subs (basically variants of {$a cmp $b}. There's an old-ish branch
of mine in the perl repository which adds optimization for {$a->[0] cmp
$b->[0]} and its variants, but I could never really get the failure
modes right when somebody passes in the wrong data structures. Mostly
for lack of diligence. Look for "smueller/..." branches.
Cheers,
Steffen
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