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>
Cc: pgsql-hackers@postgresql.org
Date: 2018-01-30T21:24:51Z
Lists: pgsql-hackers 

On 01/30/2018 12:24 AM, Andres Freund wrote:
> Hi,
> 
> On 2018-01-30 00:16:46 +0100, Tomas Vondra wrote:
>> FWIW I've installed llvm 5.0.1 from distribution package, and now
>> everything builds fine (I don't even need the configure tweak).
>>
>> I think I had to build the other binaries because there was no 5.x llvm
>> back then, but it's too far back so I don't remember.
>>
>> Anyway, seems I'm fine for now.
> 
> Phew, I'm relieved.  I'd guess you buily a 5.0 version while 5.0 was
> still in development, so not all 5.0 functionality was available. Hence
> the inconsistent looking result.  While I think we can support 4.0
> without too much problem, there's obviously no point in trying to
> support old between releases versions...
> 

That's quite possible, but I don't really remember :-/

But I ran into another issue today, where everything builds fine (llvm
5.0.1, gcc 6.4.0), but at runtime I get errors like this:

ERROR:
LLVMCreateMemoryBufferWithContentsOfFile(/home/tomas/pg-llvm/lib/postgresql/llvmjit_types.bc)
failed: No such file or directory

It seems the llvmjit_types.bc file ended up in the parent directory
(/home/tomas/pg-llvm/lib/) for some reason. After simply copying it to
the expected place everything started working.


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".