[llvm-bugs] [Bug 43244] New: 9.0rc3 SingleSource/UnitTests/Vector/AVX512F/Vector-AVX512F-t_movzext.test fails

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=43244

            Bug ID: 43244
           Summary: 9.0rc3
                    SingleSource/UnitTests/Vector/AVX512F/Vector-AVX512F-t
                    _movzext.test fails
           Product: clang
           Version: 9.0
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: LLVM Codegen
          Assignee: unassignedclangbugs at nondot.org
          Reporter: brian.cain at gmail.com
                CC: llvm-bugs at lists.llvm.org, neeilans at live.com,
                    richard-llvm at metafoo.co.uk

While running the test-release.sh on Ubuntu 16.04, the test-suite run fails on
'SingleSource/UnitTests/Vector/AVX512F/Vector-AVX512F-t_movzext.test'.

The build machine I used has a skylake CPU (Silver 4114).  My previous builds
of llvm+clang on Ubuntu 16 were usually on a much older AMD CPU that would have
not had support for this AVX512 test case.

Because of the test's description and the failure mode, I've speculated that
this is a codegen failure.

~~~~~~~

FAIL: test-suite ::
SingleSource/UnitTests/Vector/AVX512F/Vector-AVX512F-t_movzext.test (930 of
991)
******************** TEST 'test-suite ::
SingleSource/UnitTests/Vector/AVX512F/Vector-AVX512F-t_movzext.test' FAILED
********************

/local/mnt/brian/bcain_clang_tedwood-ubuntu_9506/llvm/utils/release/rc3/test-suite-build/tools/timeit-target
--limit-core 0 --limit-cpu 7200 --timeout 7200 --limit-file-size 104857600
--limit-rss-size 838860800 --append-exitstatus --redirect-output
/local/mnt/brian/bcain_clang_tedwood-ubuntu_9506/llvm/utils/release/rc3/test-suite-build/SingleSource/UnitTests/Vector/AVX512F/Output/Vector-AVX512F-t_movzext.test.out
--redirect-input /dev/null --chdir
/local/mnt/brian/bcain_clang_tedwood-ubuntu_9506/llvm/utils/release/rc3/test-suite-build/SingleSource/UnitTests/Vector/AVX512F
--summary
/local/mnt/brian/bcain_clang_tedwood-ubuntu_9506/llvm/utils/release/rc3/test-suite-build/SingleSource/UnitTests/Vector/AVX512F/Output/Vector-AVX512F-t_movzext.test.time
/local/mnt/brian/bcain_clang_tedwood-ubuntu_9506/llvm/utils/release/rc3/test-suite-build/SingleSource/UnitTests/Vector/AVX512F/Vector-AVX512F-t_movzext
cd
/local/mnt/brian/bcain_clang_tedwood-ubuntu_9506/llvm/utils/release/rc3/test-suite-build/SingleSource/UnitTests/Vector/AVX512F
;
/local/mnt/brian/bcain_clang_tedwood-ubuntu_9506/llvm/utils/release/rc3/test-suite-build/tools/fpcmp-target
/local/mnt/brian/bcain_clang_tedwood-ubuntu_9506/llvm/utils/release/rc3/test-suite-build/SingleSource/UnitTests/Vector/AVX512F/Output/Vector-AVX512F-t_movzext.test.out
t_movzext.reference_output

/local/mnt/brian/bcain_clang_tedwood-ubuntu_9506/llvm/utils/release/rc3/test-suite-build/tools/fpcmp-target:
files differ without tolerance allowance

********************
Testing: 0 .. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90..
Testing Time: 82.47s
********************
Failing Tests (1):
    test-suite ::
SingleSource/UnitTests/Vector/AVX512F/Vector-AVX512F-t_movzext.test

  Expected Passes    : 990
  Unexpected Failures: 1
CMakeFiles/check.dir/build.make:1047: recipe for target 'CMakeFiles/check'
failed

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