Re: [PATCH] jit: fix build with LLVM-21

From: Holger Hoffstätte <holger(at)applied-asynchrony(dot)com>
To: Peter Eisentraut <peter(at)eisentraut(dot)org>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: [PATCH] jit: fix build with LLVM-21
Date: 2025-09-12 14:22:51
Message-ID: 44718204-61a5-91b1-5574-154ff7a019f6@applied-asynchrony.com
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On 2025-09-12 14:47, Holger Hoffstätte wrote:
<snip>
> I temporarily removed the __arch64__ guard and can reproduce the above error,
> using either gcc-15 or clang-21. It seems this llvm monkey patch backport thing
> is affected by the following commit in llvm-21:
> https://github.com/llvm/llvm-project/commit/cd585864c0bbbd74ed2a2b1ccc191eed4d1c8f90
>
> Trying to figure out how to adapt the code..

Try the attached patch on your homebrew setup.

This compiles and passes "make check", though I do not think it runs any jit tests.
So intead I dropped this into my 17.6, disabled the __arch64__ guard to make sure
I get the backport class, rebuilt and ran the jit on/off example from the docs.
This showed the expected performance difference with jit=on vs. off.

cheers
Holger

Attachment Content-Type Size
llvm-21-aarch64.patch text/x-patch 1.5 KB

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