Horton

Re: JIT compiling with LLVM v11

Andres Freund <andres@anarazel.de>

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From: Andres Freund <andres@anarazel.de>
To: Thomas Munro <thomas.munro@enterprisedb.com>
Cc: Peter Eisentraut <peter.eisentraut@2ndquadrant.com>, Pg Hackers <pgsql-hackers@postgresql.org>, Pierre Ducroquet <p.psql@pinaraf.info>
Date: 2018-03-05T05:00:06Z
Lists: pgsql-hackers 
Hi,

On 2018-03-05 17:32:09 +1300, Thomas Munro wrote:
> I tried out your "jit" branch on my macOS 10.13.3 system.  Vendor "cc"
> and "c++" are version "Apple LLVM version 9.0.0 (clang-900.0.39.2)".
> I used MacPorts (whereas Peter E is using HomeBrew) to install LLVM
> with "sudo port install llvm-5.0".

Thanks for checking!


> warning: ignoring debug info with an invalid version (700000003) in
> /Users/munro/install/postgres/lib/llvmjit_types.bc

That's harmless, log output aside. Should strip the debug info there, to
remove the potential for that issue.


> Looking at llvm_get_function(), the function that raises that error, I
> see that there are a few different paths here.  I don't have
> HAVE_DECL_LLVMORCGETSYMBOLADDRESSIN defined, and I don't have LLVM <
> 5, so I should be getting the symbol address with
> LLVMOrcGetSymbolAddress(llvm_opt0_orc, &addr, mangled) or
> LLVMOrcGetSymbolAddress(llvm_opt3_orc, &addr, mangled), but clearly
> those are returning NULL.

Yep. I wonder if this is some symbol naming issue or such, because
emitting and relocating the object worked without an error.


> Not sure what's happening yet...

Hm. :/

Greetings,

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".