8373722: [TESTBUG] compiler/vectorapi/TestVectorOperationsWithPartialSize.java fails intermittently

[XiaohongGong]

Hi all,

This pull request contains a backport of commit 6eaabed5 from the openjdk/jdk repository.

The commit being backported was authored by Xiaohong Gong on 5 Jan 2026 and was reviewed by Jie Fu, Jatin Bhateja, Eric Fang and Quan Anh Mai.

Thanks!

---

Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• JDK-8373722: [TESTBUG] compiler/vectorapi/TestVectorOperationsWithPartialSize.java fails intermittently (Bug - P4)

Reviewers

• Tobias Hartmann (@TobiHartmann - Reviewer)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk.git pull/29053/head:pull/29053
$ git checkout pull/29053

Update a local copy of the PR:
$ git checkout pull/29053
$ git pull https://git.openjdk.org/jdk.git pull/29053/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 29053

View PR using the GUI difftool:
$ git pr show -t 29053

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Download this PR as a diff file:
https://git.openjdk.org/jdk/pull/29053.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back xgong! A progress list of the required criteria for merging this PR into jdk26 will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

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

ℹ️ This project also has non-automated pre-integration requirements. Please see the file CONTRIBUTING.md for details.

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

8373722: [TESTBUG] compiler/vectorapi/TestVectorOperationsWithPartialSize.java fails intermittently

Reviewed-by: thartmann

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

At the time when this comment was updated there had been no new commits pushed to the jdk26 branch. If another commit should be pushed before you perform the /integrate command, your PR will be automatically rebased. If you prefer to avoid any potential automatic rebasing, please check the documentation for the /integrate command for further details.

➡️ To integrate this PR with the above commit message to the jdk26 branch, type /integrate in a new comment.

[openjdk]

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

[openjdk]

@XiaohongGong The following label will be automatically applied to this pull request:

• hotspot-compiler

When this pull request is ready to be reviewed, an "RFR" email will be sent to the corresponding mailing list. If you would like to change these labels, use the /label pull request command.

[mlbridge]

Webrevs

• 00: Full (65006f54)

[TobiHartmann]

Looks good.

[XiaohongGong]

Thanks for your review @TobiHartmann !

[XiaohongGong]

Seems the GHA failure is not caused by this change as I can observe the same issue on other PRs.

[XiaohongGong]

/integrate

[openjdk]

Going to push as commit 93675e6.
Since your change was applied there have been 6 commits pushed to the jdk26 branch:

• 3213465: 8370200: Crash: assert(outer->outcnt() >= phis + 2 - be_loads && outer->outcnt() <= phis + 2 + stores + 1) failed: only phis
• ebe8974: 8373524: C2: no reachable node should have no use
• 3103fa0: 8373122: JFR build failure with CDS disabled due to -Werror=unused-function after JDK-8365400
• ... and 3 more: https://git.openjdk.org/jdk/compare/d8a1c1d04cab940b4a6cbe82fa2e445102aa9896...jdk26

Your commit was automatically rebased without conflicts.

[openjdk]

@XiaohongGong Pushed as commit 93675e6.

💡 You may see a message that your pull request was closed with unmerged commits. This can be safely ignored.