Re: JIT compiling with LLVM v12.2

From: Andres Freund <andres(at)anarazel(dot)de>
To: Thomas Munro <thomas(dot)munro(at)enterprisedb(dot)com>
Cc: Stephen Frost <sfrost(at)snowman(dot)net>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: JIT compiling with LLVM v12.2
Date: 2018-03-21 20:09:58
Message-ID: 20180321200958.6xtdggilzpgnz5ev@alap3.anarazel.de
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Hi,

On 2018-03-22 09:00:19 +1300, Thomas Munro wrote:
> On Thu, Mar 22, 2018 at 8:47 AM, Andres Freund <andres(at)anarazel(dot)de> wrote:
> > On 2018-03-21 20:06:49 +1300, Thomas Munro wrote:
> >> On Wed, Mar 21, 2018 at 4:07 PM, Andres Freund <andres(at)anarazel(dot)de> wrote:
> >> > Indeed. I've pushed a rebased version now, that basically just fixes the
> >> > issue Thomas observed.
> >>
> >> I set up a 32 bit i386 virtual machine and installed Debian 9.4.
> >> Compiler warnings:
> >
> > Was that with a 64bit CPU and 32bit OS, or actually a 32bit CPU?
>
> 64 bit CPU, 32 bit OS. I didn't try Debian multi-arch i386 support on
> an amd64 system, but that's probably an easier way to do this if you
> already have one of those...

Ah, then I think I might know what happend. Does it start to work if you
replace the auto-detected cpu with "x86"? I think what might happen is
that it generates 64bit code, because of the detected CPU name.

Let me set up a chroot, in this case I should be able to emulate this
pretty easily...

Greetings,

Andres Freund

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