Horton

Re: JIT compiling with LLVM v11

Tom Lane <tgl@sss.pgh.pa.us>

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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Andres Freund <andres@anarazel.de>
Cc: Robert Haas <robertmhaas@gmail.com>, Peter Eisentraut <peter.eisentraut@2ndquadrant.com>, Pg Hackers <pgsql-hackers@postgresql.org>
Date: 2018-03-13T19:12:59Z
Lists: pgsql-hackers 
Andres Freund <andres@anarazel.de> writes:
> On 2018-03-13 14:36:44 -0400, Robert Haas wrote:
>> I realize that EXPLAIN (JIT OFF) may sound like it's intended to
>> disable JIT itself

> Yea, that's what I'm concerned about.

>> , but I think it's pretty clear that EXPLAIN (BUFFERS OFF) does not
>> disable the use of actual buffers, only the display of buffer-related
>> information.

> Hm.

FWIW, I agree with Robert's preference for just JIT here.  The "info"
bit isn't conveying anything.  And we've never had any EXPLAIN options
that actually change the behavior of the explained command, only ones
that change the amount of info displayed.  I don't see why we'd
consider JIT an exception to that.

			regards, tom lane

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".