8380565: PPC64: deoptimization stub should save vector registers

[TheRealMDoerr]

Backport of JDK-8380565 + testfix JDK-8381315.

Most of it applies cleanly, but I had to make small adaptations because JDK-8354650 and JDK-8351666 are not in jdk21u (and not really backport candidates because they are large and require follow-up changes): VectorSRegisters are used in sharedRuntime_ppc.cpp‎. The upstream version only uses VectorRegisters.

The included regression test fails without this fix and passes with this fix.

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Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• JDK-8380565 needs maintainer approval
• Commit message must refer to an issue
• JDK-8381315 needs maintainer approval

Issues

• JDK-8380565: PPC64: deoptimization stub should save vector registers (Bug - P3 - Requested)
• JDK-8381315: compiler/vectorapi/TestVectorReallocation.java fails with -XX:UseAVX=1 after JDK-8380565 (Bug - P4 - Requested)

Reviewers

• Richard Reingruber (@reinrich - Reviewer)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk21u-dev.git pull/2771/head:pull/2771
$ git checkout pull/2771

Update a local copy of the PR:
$ git checkout pull/2771
$ git pull https://git.openjdk.org/jdk21u-dev.git pull/2771/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 2771

View PR using the GUI difftool:
$ git pr show -t 2771

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk21u-dev/pull/2771.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back mdoerr! 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.

[mlbridge]

Webrevs

• 01: Full - Incremental (9f24c4f6)
• 00: Full (14591b2c)

[reinrich]

Looks good.
Cheers, Richard.

[TheRealMDoerr]

Thanks for the review!

[openjdk]

⚠️ @TheRealMDoerr 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.

[TheRealMDoerr]

/issue add JDK-8381315

[openjdk]

@TheRealMDoerr
Adding additional issue to issue list: 8381315: compiler/vectorapi/TestVectorReallocation.java fails with -XX:UseAVX=1 after JDK-8380565.