Note: This is a public test instance of Red Hat Bugzilla. The data contained within is a snapshot of the live data so any changes you make will not be reflected in the production Bugzilla. Email is disabled so feel free to test any aspect of the site that you want. File any problems you find or give feedback at bugzilla.redhat.com.
Bug 1410950 - Cannot select:... AtomicFence, when compiling Rust on s390x
Summary: Cannot select:... AtomicFence, when compiling Rust on s390x
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: llvm
Version: 25
Hardware: s390x
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Adam Jackson
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks: 1410952
TreeView+ depends on / blocked
 
Reported: 2017-01-06 23:34 UTC by Josh Stone
Modified: 2017-01-16 19:51 UTC (History)
9 users (show)

Fixed In Version: llvm-3.8.1-2.fc24 llvm-3.8.1-2.fc25
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
: 1410952 (view as bug list)
Environment:
Last Closed: 2017-01-14 05:19:26 UTC
Type: Bug
Embargoed:

Attachments (Terms of Use)

Description Josh Stone 2017-01-06 23:34:52 UTC 
Description of problem:
Attempts to bootstrap Rust on s390x failed with an LLVM ERROR on f24 and f25.  The same srpm on f26 (with LLVM 3.9) is fine.

f24: https://s390.koji.fedoraproject.org/koji/taskinfo?taskID=2439756
f25: https://s390.koji.fedoraproject.org/koji/taskinfo?taskID=2439754

Version-Release number of selected component (if applicable):
llvm-3.8.0-1.fc25/24
building rust-1.14.0-1.fc25/24

How reproducible:
100%

Steps to Reproduce:
1. rpmbuild --rebuild rust-1.14.0-1.fc25.src.rpm
(or try again on s390.koji)

Actual results:
LLVM ERROR: Cannot select: 0x3ff793b6d90: ch = AtomicFence 0x3ff70818a70, Constant:i64<4>, Constant:i64<1>
  0x3ff728d89c0: i64 = Constant<4>
  0x3ff793b7120: i64 = Constant<1>
In function: _ZN33_$LT$alloc..arc..Arc$LT$T$GT$$GT$9drop_slow17h19a3f415d8721b31E

Expected results:
no compiler errors :)

Additional info:
A similar problem was reported upstream for compiling v8 with Clang 3.8, then closed when it was found to work with 3.9.  That's probably a simpler reproducer.
https://llvm.org/bugs/show_bug.cgi?id=28735

Also, the rawhide builds of Rust with LLVM 3.9 were fine:
https://s390.koji.fedoraproject.org/koji/buildinfo?buildID=449416
https://s390.koji.fedoraproject.org/koji/buildinfo?buildID=449417
Comment 1 Josh Stone 2017-01-07 00:30:57 UTC 
This looks like a pretty obvious candidate, added between 3.8 and 3.9:
https://github.com/llvm-mirror/llvm/commit/3b8a73e9fe8d4aa0b6d2130d41d8080e21ea741b
https://reviews.llvm.org/D18644
Comment 2 Josh Stone 2017-01-10 19:21:59 UTC 
I'm still testing the full Rust build, but that patch looks good so far.
Scratch: https://s390.koji.fedoraproject.org/koji/taskinfo?taskID=2440095
Comment 3 Fedora Update System 2017-01-11 02:11:52 UTC 
llvm-3.8.1-2.fc24 has been submitted as an update to Fedora 24. https://bodhi.fedoraproject.org/updates/FEDORA-2017-55f46db34e
Comment 4 Fedora Update System 2017-01-11 02:12:13 UTC 
llvm-3.8.1-2.fc25 has been submitted as an update to Fedora 25. https://bodhi.fedoraproject.org/updates/FEDORA-2017-1e88986ac9
Comment 5 Fedora Update System 2017-01-12 07:50:54 UTC 
llvm-3.8.1-2.fc24 has been pushed to the Fedora 24 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2017-55f46db34e
Comment 6 Fedora Update System 2017-01-12 07:52:07 UTC 
llvm-3.8.1-2.fc25 has been pushed to the Fedora 25 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2017-1e88986ac9
Comment 7 Fedora Update System 2017-01-14 05:19:26 UTC 
llvm-3.8.1-2.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.
Comment 8 Fedora Update System 2017-01-16 19:51:20 UTC 
llvm-3.8.1-2.fc25 has been pushed to the Fedora 25 stable repository. If problems still persist, please make note of it in this bug report.
Note You need to log in before you can comment on or make changes to this bug.