9.0rc3 SingleSource/UnitTests/Vector/AVX512F/Vector-AVX512F-t_movzext.test fails

[llvmbot]

Bugzilla Link	43244
Resolution	FIXED
Resolved on	Sep 09, 2019 02:51
Version	9.0
OS	Windows NT
Blocks	#41819
Reporter	LLVM Bugzilla Contributor
CC	@topperc,@zmodem,@RKSimon,@zygoloid,@rotateright

Extended Description

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

[RKSimon]

This is a duplicate of llvm/llvm-bugzilla-archive#43170 which was fixed in trunk at rL370592

The cherry pick might not be straightforward as the vector-shuffle-avx512.ll test file has been regenerated and updated for the KNL ABI fix since the branch.

[zmodem]

Merged to release_90 in r371382.

It merged without issues -- my lucky day I guess :-)