Horton

Re: JIT compiling with LLVM v10.0

Andres Freund <andres@anarazel.de>

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From: Andres Freund <andres@anarazel.de>
To: Pierre Ducroquet <p.psql@pinaraf.info>
Cc: pgsql-hackers@lists.postgresql.org, pgsql-hackers@postgresql.org
Date: 2018-02-07T21:34:02Z
Lists: pgsql-hackers 
Hi,

On 2018-02-07 20:35:12 +0100, Pierre Ducroquet wrote:
> I also find it more readable and it looks cleaner, insane guys could be able 
> to write their own JIT engines for PostgreSQL by patching a single
> file :)

Right - we could easily make the libname configurable if requested.


> Since it's now in its own .so file, does it still make as much sense using 
> mostly the LLVM C API ?

Yes, I definitely want to continue that. For one the C API is a *lot*
more stable, for another postgres is C.


> I included a small addition to the gitignore file, I'm surprised you were not 
> bothered by the various .bc files generated.

I use a VPATH build (i.e. source code is in a different directory than
the build products), so I do not really see that. But yes, it makes
sense to add ignores....

Thanks for looking,

Andres Freund

Commits

  1. Improve JIT docs.

  2. Add documentation for the JIT feature.

  3. Add EXPLAIN support for JIT.

  4. Add inlining support to LLVM JIT provider.

  5. JIT tuple deforming in LLVM JIT provider.

  6. Add FIELDNO_* macro designating offset into structs required for JIT.

  7. Add expression compilation support to LLVM JIT provider.

  8. Expand list of synchronized types and functions in LLVM JIT provider.

  9. Add helpers for emitting LLVM IR.

  10. Basic planner and executor integration for JIT.

  11. Debugging and profiling support for LLVM JIT provider.

  12. Support for optimizing and emitting code in LLVM JIT provider.

  13. Add file containing extensions of the LLVM C API.

  14. Basic JIT provider and error handling infrastructure.

  15. Add configure infrastructure (--with-llvm) to enable LLVM support.

  16. Add C++ support to configure.

  17. Add PGAC_PROG_VARCC_VARFLAGS_OPT autoconf macro.

  18. Fix VM buffer pin management in heap_lock_updated_tuple_rec().

  19. Allow tupleslots to have a fixed tupledesc, use in executor nodes.

  20. Expression evaluation based aggregate transition invocation.

  21. Perform slot validity checks in a separate pass over expression.

  22. Rely on executor utils to build targetlist for DML RETURNING.

  23. Refer to OS X as "macOS", except for the port name which is still "darwin".