[llvm-dev] X32 bugs around "cannot select" lingering around

[Derek Schuff via llvm-dev]

As far as I know, nobody is actively maintaining it. Pavel and I have
contributed in the past, but neither of us much recently. I occasionally
get sent patches and I do review and commit them, but I'm not working on
fixing bugs myself.

On Mon, Sep 24, 2018 at 9:22 PM Chupin, Pavel V via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> I don't think it's stable, unless somebody recently contributed to x32.
> The last patch I sent was ~4 years ago and there've been quite a few
> issues left to fix for x32. :((
>
> -- Pavel
>
>
> -----Original Message-----
> From: Andres Freund [mailto:andres at anarazel.de]
> Sent: Friday, September 21, 2018 4:55 PM
> To: llvm-dev <llvm-dev at lists.llvm.org>; Zinovy Nis <zinovy.nis at gmail.com>;
> Chupin, Pavel V <pavel.v.chupin at intel.com>; Lang Hames <lhames at gmail.com>
> Subject: X32 bugs around "cannot select" lingering around
>
> Hi,
>
> There's several, to my eyes, somewhat related looking bugs:
>
> Bug 36743 - Cannot select: X86ISD::CALL ICE with -mx32 -O2 -fno-plt
> https://bugs.llvm.org/show_bug.cgi?id=36743
>
> Bug 34268 - JITting of x32 code on x64 fails with crash or instruction
> selection error.
> https://bugs.llvm.org/show_bug.cgi?id=34268
>
> There's unfortunately been no investigation.
>
> I'm asking because I hit something eerily looking like the second case, in
> postgresql.  The debian packagers report that postgres' tests fail on
> x32 when llvm support is enabled.  The relevant bitcode excerpt and error
> is:
>
> https://gist.github.com/anarazel/f8fe66e149740479ec8501683008620e
>
> Is x32 support considered stable?
>
> Greetings,
>
> Andres Freund
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