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Postings from February 2021
>It's not a specific proposal. Its just a first step in common compiler
optimisation techniques
I understand that this is one example of the difficulty of introducing
hooks.
2021年2月15日(月) 20:46 Dave Mitchell <davem@iabyn.com>:
> On Tue, Feb 09, 2021 at 08:28:00AM +0900, Yuki Kimoto wrote:
> > I want to know the following optimization more.
> >
> > > separate out op
> > > chains into Basic Blocks for better optimisation
>
> It's not a specific proposal. Its just a first step in common compiler
> optimisation techniques (for all languages, not just perl) where a chain
> of opcodes is identified as a "basic block" - a continuous chain of
> execution that can't be entered into or exited from apart from at the
> start and end. So for example the A;B;C and X;Y; are basic blocks in this:
> if (COND) { A;B;C; } else { X;Y; }
> while the whole if statement isn't a basic block.
>
> Many optimisations can be performed only or better on basic blocks.
>
> I have no plans to introduce basic block detection into the perl
> internals, nor to do anything with them. I mentioned them just as an
> example of how hooks can potentially get in the way of people wanting to
> do new stuff.
>
>
> --
> "You're so sadly neglected, and often ignored.
> A poor second to Belgium, When going abroad."
> -- Monty Python, "Finland"
>
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