8214761: Bug in parallel Kahan summation implementation

[GoeLin]

I backport this for parity with 11.0.15-oracle.

This includes a new test that is buggy, thus I will push this along with JDK-8273514, which fixes the test.

---

Progress

• Change must not contain extraneous whitespace
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Issue

• JDK-8214761: Bug in parallel Kahan summation implementation

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.java.net/jdk11u-dev pull/707/head:pull/707
$ git checkout pull/707

Update a local copy of the PR:
$ git checkout pull/707
$ git pull https://git.openjdk.java.net/jdk11u-dev pull/707/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 707

View PR using the GUI difftool:
$ git pr show -t 707

Using diff file

Download this PR as a diff file:
https://git.openjdk.java.net/jdk11u-dev/pull/707.diff

[bridgekeeper]

👋 Welcome back goetz! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

This backport pull request has now been updated with issue from the original commit.

[openjdk]

@GoeLin This change now passes all automated pre-integration checks.

After integration, the commit message for the final commit will be:

8214761: Bug in parallel Kahan summation implementation

You can use pull request commands such as /summary, /contributor and /issue to adjust it as needed.

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[mlbridge]

Webrevs

• 00: Full (f8bafedc)

[GoeLin]

/integrate

[openjdk]

Going to push as commit a481c9a.
Since your change was applied there have been 7 commits pushed to the master branch:

• eaa4197: 8272473: Parsing epoch seconds at a DST transition with a non-UTC parser is wrong
• 15f3e0e: 8255035: Update BCEL to Version 6.5.0
• c3aaef3: 8257769: Cipher.getParameters() throws NPE for ChaCha20-Poly1305
• 9bf52e6: 8233827: Enable screenshots in the enhanced failure handler on Linux/macOS
• 4beb4ad: 8210236: Prepare ciReceiverTypeData::translate_receiver_data_from for concurrent class unloading
• 8878ffc: 8273366: [testbug] javax/swing/UIDefaults/6302464/bug6302464.java fails on macOS12
• 554498d: 8199079: Test javax/swing/UIDefaults/6302464/bug6302464.java is unstable

Your commit was automatically rebased without conflicts.

[openjdk]

@GoeLin Pushed as commit a481c9a.

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