Horton

Re: JIT compiling with LLVM v9.0

Tomas Vondra <tomas.vondra@2ndquadrant.com>

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From: Tomas Vondra <tomas.vondra@2ndquadrant.com>
To: Andres Freund <andres@anarazel.de>, pgsql-hackers@postgresql.org
Date: 2018-01-29T21:51:38Z
Lists: pgsql-hackers

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On 01/24/2018 08:20 AM, Andres Freund wrote:
> Hi,
> 
> I've spent the last weeks working on my LLVM compilation patchset. In
> the course of that I *heavily* revised it. While still a good bit away
> from committable, it's IMO definitely not a prototype anymore.
> 
> There's too many small changes, so I'm only going to list the major
> things. A good bit of that is new. The actual LLVM IR emissions itself
> hasn't changed that drastically.  Since I've not described them in
> detail before I'll describe from scratch in a few cases, even if things
> haven't fully changed.
> 

Hi, I wanted to look at this, but my attempts to build the jit branch
fail with some compile-time warnings (uninitialized variables) and
errors (unknown types, incorrect number of arguments). See the file
attached.

I wonder if I'm doing something wrong, or if there's something wrong
with my environment. I do have this:

$ clang -v
clang version 5.0.0 (trunk 299717)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/local/bin
Selected GCC installation: /usr/lib/gcc/x86_64-pc-linux-gnu/6.4.0
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Selected multilib: .;@m64

regards

-- 
Tomas Vondra                  http://www.2ndQuadrant.com
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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".