8283145: [vector] Add the compiler IR and aarch64 support for count leading and trailing zeros

[XiaohongGong]

This patch adds the hotspot compiler implementations for the vector operations of count leading and trailing zeros. It adds:

• two vector nodes respectively for the two vector operations
• the backend implementations for aarch64 NEON and SVE

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Progress

• Change must not contain extraneous whitespace
• Change must be properly reviewed

Issue

• JDK-8283145: [vector] Add the compiler IR and aarch64 support for count leading and trailing zeros

Reviewers

• Ningsheng Jian (@nsjian - Committer)
• Jatin Bhateja (@jatin-bhateja - Committer)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.java.net/panama-vector pull/180/head:pull/180
$ git checkout pull/180

Update a local copy of the PR:
$ git checkout pull/180
$ git pull https://git.openjdk.java.net/panama-vector pull/180/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 180

View PR using the GUI difftool:
$ git pr show -t 180

Using diff file

Download this PR as a diff file:
https://git.openjdk.java.net/panama-vector/pull/180.diff

[bridgekeeper]

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

[mlbridge]

Webrevs

• 01: Full - Incremental (39e51053)
• 00: Full (2be0472c)

[XiaohongGong]

Thanks for your review @nsjian ! The comments have been addressed. Thanks!

[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:

8283145: [vector] Add the compiler IR and aarch64 support for count leading and trailing zeros

Reviewed-by: njian, jbhateja

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 1 new commit pushed to the vectorIntrinsics branch:

• 701e6ba: 8282942: [vector] Trivial code style updates

Please see this link for an up-to-date comparison between the source branch of this pull request and the vectorIntrinsics branch.
As there are no conflicts, your changes will automatically be rebased on top of these commits when integrating. If you prefer to avoid this automatic rebasing, please check the documentation for the /integrate command for further details.

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[XiaohongGong]

Hi @jatin-bhateja , could you please help to take a look at the mid-end part of this patch? Thanks so much!

[jatin-bhateja]

Common IR changes looks good to me.

[XiaohongGong]

Thanks for the review @jatin-bhateja !

[XiaohongGong]

/integrate

[openjdk]

Going to push as commit 03e4da7.
Since your change was applied there has been 1 commit pushed to the vectorIntrinsics branch:

• 701e6ba: 8282942: [vector] Trivial code style updates

Your commit was automatically rebased without conflicts.

[openjdk]

@XiaohongGong Pushed as commit 03e4da7.

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