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Re: Perl 5 Compiler, Again!

by flexvault (Monsignor)
on Aug 14, 2012 at 12:17 UTC ( #987338=note: print w/replies, xml ) Need Help??

in reply to Perl 5 Compiler, Again!

Dear Monks,

Thanks to everyone for giving valid technical reasons for the lack of an integrated Perl 'compiler'. Actually I wrote a 'C' version of 'uxbasic', but abandoned it in favor of Perl. It worked, was fast, but lacked the feature rich capability of Perl. So I wrote an 'uxbasic' to Perl translator script that took many of my products and moved them to Perl. It was 99% correct, and with a minimum of debugging, I had a Perl version of my products that could continue to grow.

It's a lot more fun working with Perl than either 'C' or 'uxbasic'.

Thank you...Ed

"Well done is better than well said." - Benjamin Franklin

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Re^2: Perl 5 Compiler, Again!
by rurban (Scribe) on Sep 20, 2012 at 23:22 UTC

    There is an integrated compiler in perl5. And there are external compilers.

    You will not easily see what the integrated compiler in perl5 does, but you see some result with B::Concise. All the ex-OPs there are optimized out already.

    $ perl -MO=Concise -e'1+1' 3 <@> leave[1 ref] vKP/REFC ->(end) 1 <0> enter ->2 2 <;> nextstate(main 1 -e:1) v:{ ->3 - <0> ex-const v ->3
    E.g. 1=1 was constant folded here.
    $ perl -MO=Concise -e'$a=1+$a' 8 <@> leave[1 ref] vKP/REFC ->(end) 1 <0> enter ->2 2 <;> nextstate(main 1 -e:1) v:{ ->3 7 <2> sassign vKS/2 ->8 5 <2> add[t1] sK/2 ->6 3 <$> const(IV 1) s ->4 - <1> ex-rv2sv sK/1 ->5 4 <$> gvsv(*a) s ->5 - <1> ex-rv2sv sKRM*/1 ->7 6 <$> gvsv(*a) s ->7
    All the sv references rv2sv were optimized to direct gvsv accesses.

    perlcc is the backend for 3 external compilers.

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