Re: A new JIT engine for PHP-8.4/9

On 15-9-2023 12:15, Dmitry Stogov wrote:

Hi, After the code-review feedback, one of the most questionable decisions was changed. Instead of including IR Framework as a git submodule, now its part is embedded into php-src. This will complicate the IR/JIT development a bit, but will simplify things for everyone else. I'm going to merge https://github.com/php/php-src/pull/12079 into master next week. If someone likes to take a look before, please do it now. After the merge, I don't plan to do active PHP-JIT development for 1-2 months (I'll wait for problems, bugs, etc and work on general IR improvements). Then, in case of no major problems, I'm going to remove the old JIT implementation and make a PHP-JIT code-cleanup pass. Thanks. Dmitry. On Mon, Sep 11, 2023 at 12:28 PM Dmitry Stogov <dmitrystogov@gmail.com> wrote:

Hi internals, I'm glad to present a new JIT engine that is going to be used in the next major PHP version. Now it's a real optimizing compiler with Intermediate Representation similar to Java HotSpot server compiler. It makes a base for future improvements and eliminates many low-level details of the existing PHP JIT. Instead of supporting assembler code for different CPUs, now PHP generates a single IR and passes it to a PHP-independent JIT engine. The old JIT implementation is going to be kept for a while. Everybody are welcome to take a look over tne code https://github.com/php/php-src/pull/12079 Thanks. Dmitry.

If merged to master, will that automatically mean that the next version of PHP will be PHP 9.0 ? If so, would that warrant a separate discussion ? (whether there should still be a 8.4/8.5/8.6 or not) Smile, Juliette