LLVM to 9.0.1

[cmsbuild]

backport of #5505

[cmsbuild]

A new Pull Request was created by @cmsbuild for branch IB/CMSSW_11_1_X/master.

@cmsbuild, @smuzaffar, @mrodozov, @tulamor can you please review it and eventually sign? Thanks.
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• Backported from LLVM to 9.0.1 #5505

[smuzaffar]

please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-run-pr-tests/4505/console Started: 2020/02/05 09:36

[cmsbuild]

+1
Tested at: 6caae1f
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-b7d8b6/4505/summary.html
CMSSW: CMSSW_11_1_X_2020-02-04-2300
SCRAM_ARCH: slc7_amd64_gcc820

[cmsbuild]

Comparison job queued.

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-b7d8b6/4505/summary.html

Comparison Summary:

• No significant changes to the logs found
• Reco comparison results: 0 differences found in the comparisons
• DQMHistoTests: Total files compared: 34
• DQMHistoTests: Total histograms compared: 2698043
• DQMHistoTests: Total failures: 1
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 2697696
• DQMHistoTests: Total skipped: 346
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 33 files compared)
• Checked 147 log files, 16 edm output root files, 34 DQM output files

[smuzaffar]

+externals
@silviodonato , as cms-sw/cmssw#28851 is now merged there is nothing blocking to integrate this in normal 11.1.X IBs.

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next IB/CMSSW_11_1_X/master IBs (tests are also fine). This pull request will now be reviewed by the release team before it's merged. @davidlange6, @silviodonato, @fabiocos (and backports should be raised in the release meeting by the corresponding L2)

[smuzaffar]

@silviodonato , any objection on merging this for normal IBs?