Horton

Re: JIT compiling with LLVM v9.1

Andres Freund <andres@anarazel.de>

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From: Andres Freund <andres@anarazel.de>
To: pgsql-hackers@postgresql.org
Date: 2018-01-29T09:53:50Z
Lists: pgsql-hackers 
Hi,

On 2018-01-23 23:20:38 -0800, Andres Freund wrote:
> == Code ==
> 
> As the patchset is large (500kb) and I'm still quickly evolving it, I do
> not yet want to attach it. The git tree is at
>   https://git.postgresql.org/git/users/andresfreund/postgres.git
> in the jit branch
>   https://git.postgresql.org/gitweb/?p=users/andresfreund/postgres.git;a=shortlog;h=refs/heads/jit

I've just pushed an updated and rebased version of the tree:
- Split the large "jit infrastructure" commits into a number of smaller
  commits
- Split the C++ file
- Dropped some of the performance stuff done to heaptuple.c - that was
  mostly to make performance comparisons a bit more interesting, but
  doesn't seem important enough to deal with.
- Added a commit renaming datetime.h symbols so they don't conflict with
  LLVM variables anymore, removing ugly #undef PM/#define PM dance
  around includes. Will post separately.
- Reduced the number of pointer constants in the generated LLVM IR, by
  doing more getelementptr accesses (stem from before the time types
  were automatically synced)
- Increased number of comments a bit

There's a jit-before-rebase-2018-01-29 tag, for the state of the tree
before the rebase.

Regards,

Andres

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".