8320206: Some intrinsics/stubs missing vzeroupper on x86_64

[sviswa7]

---

Progress

• JDK-8320206 needs maintainer approval
• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• JDK-8320206: Some intrinsics/stubs missing vzeroupper on x86_64 (Enhancement - P3)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk21u.git pull/380/head:pull/380
$ git checkout pull/380

Update a local copy of the PR:
$ git checkout pull/380
$ git pull https://git.openjdk.org/jdk21u.git pull/380/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 380

View PR using the GUI difftool:
$ git pr show -t 380

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk21u/pull/380.diff

Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back sviswanathan! 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]

⚠️ @sviswa7 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.

[sviswa7]

/approval

[openjdk]

@sviswa7 usage: /approval [<id>] (request|cancel) [<text>]

[mlbridge]

Webrevs

• 00: Full (2031d72c)

[shipilev]

/approval

Note the incorrect syntax, so no actual approval request was generated.

[sviswa7]

/approval request This is a clean backport and not dependent on any other backport.,
A very small patch with changes to emit missing vzeroupper instructions at select locations to avoid AVX->SSE transition penalties.,
Please approve.

[openjdk]

@sviswa7
8320206: The approval request has been created successfully.

[jerboaa]

Please close this PR. OpenJDK 21.0.3 development happens in jdk21u-dev. I.e. this PR needs to move there now.