8381257: [s390x] deoptimization stub should save vector registers

[offamitkumar]

Hi all,

This pull request contains a backport of commit f9d1ab7c from the openjdk/jdk repository.

The commit being backported was authored by Amit Kumar on 11 May 2026 and was reviewed by Martin Doerr and Andrew Haley.

Thanks!

• I confirm that I make this contribution in accordance with the OpenJDK Interim AI Policy.

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• JDK-8381257 needs maintainer approval

Issue

• JDK-8381257: [s390x] deoptimization stub should save vector registers (Bug - P3 - Requested)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk26u.git pull/207/head:pull/207
$ git checkout pull/207

Update a local copy of the PR:
$ git checkout pull/207
$ git pull https://git.openjdk.org/jdk26u.git pull/207/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 207

View PR using the GUI difftool:
$ git pr show -t 207

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk26u/pull/207.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back amitkumar! 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 change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[openjdk]

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

[openjdk]

⚠️ @offamitkumar This change is now ready for you to apply for maintainer approval. This can be done directly in each associated issue or by using the /approval command.

[mlbridge]

Webrevs

• 00: Full (a50ce753)

[offamitkumar]

/approval request fixes test/hotspot/jtreg/compiler/vectorapi/TestVectorReallocation.java; patch applies cleanly and didn't see any regression with tier1 on s390x. Only s390x platform code is modified so no effect on other architectures.

[openjdk]

@offamitkumar
8381257: The approval request has been created successfully.

[bridgekeeper]

@offamitkumar This pull request has been inactive for more than 4 weeks and will be automatically closed if another 4 weeks passes without any activity. To avoid this, simply issue a /touch or /keepalive command to the pull request. Feel free to ask for assistance if you need help with progressing this pull request towards integration!