Debian Bug report logs - #995618
mesa: tries to uses non-available LLVM JIT on riscv64

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Aurelien Jarno <aurel32@debian.org>

To: Debian Bug Tracking System <submit@bugs.debian.org>

Subject: mesa: tries to uses non-available LLVM JIT on riscv64

Date: Sun, 03 Oct 2021 12:23:42 +0200

[Message part 1 (text/plain, inline)]

Source: mesa
Version: 21.2.2-1
Severity: important
Tags: patch
X-Debbugs-Cc: debian-riscv@lists.debian.org

Mesa version 20.3.4-1 enabled LLVM support on riscv64. However while
RISC-V is supported by LLVM, JIT is not yet supported. Support is being
worked on, and might be in LLVM 14 or 15.

This causes programs (e.g. gtk4, clutter, epiphany, etc.) to abort when
Mesa tries to execute JIT code through LLVM:

| 'generic' is not a recognized processor for this target (ignoring processor)
| 'generic' is not a recognized processor for this target (ignoring processor)
| WARNING: This target JIT is not designed for the host you are running.  If bad things happen, please choose a different -march switch.
| 'generic' is not a recognized processor for this target (ignoring processor)
| 'generic' is not a recognized processor for this target (ignoring processor)
| 'generic' is not a recognized processor for this target (ignoring processor)
| 'generic' is not a recognized processor for this target (ignoring processor)
| 'generic' is not a recognized processor for this target (ignoring processor)
| 'generic' is not a recognized processor for this target (ignoring processor)
| 'generic' is not a recognized processor for this target (ignoring processor)
| 'generic' is not a recognized processor for this target (ignoring processor)
| LLVM ERROR: Cannot select: 0x2aaab99e38: ch = store<(store 4 into %ir.1 + 4, basealign 16), trunc to i32> 0x2aaab99a28, 0x2aaab96330, 0x2aaab9a4b8, undef:i64
|   0x2aaab96330: i64,ch = load<(load 2 from %ir.0 + 6), zext from i16> 0x2aaab4c658, 0x2aaab9a658, undef:i64
|     0x2aaab9a658: i64 = add 0x2aaab95eb8, Constant:i64<6>
|       0x2aaab95eb8: i64,ch = CopyFromReg 0x2aaab4c658, Register:i64 %0
|         0x2aaab95e50: i64 = Register %0
|       0x2aaab99c30: i64 = Constant<6>
|     0x2aaab96058: i64 = undef
|   0x2aaab9a4b8: i64 = add nuw 0x2aaab95f88, Constant:i64<4>
|     0x2aaab95f88: i64,ch = CopyFromReg 0x2aaab4c658, Register:i64 %1
|       0x2aaab95f20: i64 = Register %1
|     0x2aaab96740: i64 = Constant<4>
|   0x2aaab96058: i64 = undef

The attached patch fixes that by reverting the corresponding changes.
Could you please include it in the next upload?

Thanks,
Aurelien

[mesa.riscv64.debdiff (text/plain, attachment)]

Message #10 received at 995618-close@bugs.debian.org (full text, mbox, reply):

From: Debian FTP Masters <ftpmaster@ftp-master.debian.org>

To: 995618-close@bugs.debian.org

Subject: Bug#995618: fixed in mesa 21.2.3-1

Date: Mon, 04 Oct 2021 12:33:53 +0000

Source: mesa
Source-Version: 21.2.3-1
Done: Timo Aaltonen <tjaalton@debian.org>

We believe that the bug you reported is fixed in the latest version of
mesa, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 995618@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Timo Aaltonen <tjaalton@debian.org> (supplier of updated mesa package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)


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Hash: SHA512

Format: 1.8
Date: Mon, 04 Oct 2021 15:18:27 +0300
Source: mesa
Built-For-Profiles: noudeb
Architecture: source
Version: 21.2.3-1
Distribution: unstable
Urgency: medium
Maintainer: Debian X Strike Force <debian-x@lists.debian.org>
Changed-By: Timo Aaltonen <tjaalton@debian.org>
Closes: 995618
Changes:
 mesa (21.2.3-1) unstable; urgency=medium
 .
   [ Timo Aaltonen ]
   * New upstream release.
   * rules: Build with -O2 for ppc64el.
   * Build with llvm 13.
 .
   [ Aurelien Jarno ]
   * Disable LLVM support on riscv64, it doesn't have JIT. (Closes: #995618)
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 7a204e27c352a13e34bbc3a0e2cce939259f22a0 109518 mesa_21.2.3-1.diff.gz
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Files:
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