8255378: [Vector API] Remove redundant vector length check after JDK-8254814 and JDK-8255210

[DamonFool]

Hi all,

As @iwanowww pointed out [1] that there are redundant vector length checks for reductionI [2] and reductionS [3].
It would be better to remove them.

Testing:

• jdk/incubator/vector on both AVX512 and AVX256 machines

Thanks.
Best regards,
Jie

[1] #791 (comment)
[2] https://github.com/openjdk/jdk/blob/master/src/hotspot/cpu/x86/x86.ad#L4429
[3] https://github.com/openjdk/jdk/blob/master/src/hotspot/cpu/x86/x86.ad#L4625

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• Change must be properly reviewed

Testing

	Linux x32	Linux x64	Windows x64	macOS x64
Build	✔️ (1/1 passed)	✔️ (5/5 passed)	✔️ (2/2 passed)	✔️ (2/2 passed)
Test (tier1)		✔️ (9/9 passed)	✔️ (9/9 passed)	✔️ (9/9 passed)

Issue

• JDK-8255378: [Vector API] Remove redundant vector length check after JDK-8254814 and JDK-8255210

Reviewers

• Vladimir Ivanov (@iwanowww - Reviewer)
• Andrew Dinn (@adinn - Reviewer)

Download

$ git fetch https://git.openjdk.java.net/jdk pull/854/head:pull/854
$ git checkout pull/854

[bridgekeeper]

👋 Welcome back jiefu! 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.

[DamonFool]

/issue add JDK-8255378
/test
/label add hotspot-compiler
/cc hotspot-compiler

[openjdk]

@DamonFool This issue is referenced in the PR title - it will now be updated.

[openjdk]

@DamonFool
The hotspot-compiler label was successfully added.

[openjdk]

@DamonFool The hotspot-compiler label was already applied.

[mlbridge]

Webrevs

• 00: Full (71ae5ad)

[iwanowww]

Looks good.

[openjdk]

@DamonFool 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:

8255378: [Vector API] Remove redundant vector length check after JDK-8254814 and JDK-8255210

Reviewed-by: vlivanov, adinn

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 46 new commits pushed to the master branch:

• 2c9dfc7: 8255234: ZGC: Bulk allocate forwarding data structures
• b7d483c: 8255245: C1: Fix output of -XX:+PrintCFGToFile to open it with visualizer
• 5e0a8cd: 8255488: Re-enable some problem listed tests
• 3f8bd92: 8233556: [TESTBUG] JPopupMenu tests fail on MacOS
• 4acf634: 8171998: javax/swing/JMenu/4692443/bug4692443.java fails on Windows
• a804c6a: 8254871: Remove unnecessary string copy in NetworkInterface.c
• acd0e25: 8255254: Split os::reserve_memory and os::map_memory_to_file interfaces
• dc85a3f: 8015602: [macosx] Test javax/swing/SpringLayout/4726194/bug4726194.java fails on MacOSX
• 1d245c6: 8252117: com/sun/jdi/BadHandshakeTest.java failed with "ConnectException: Connection refused: connect"
• 7a7ce02: 8007632: DES/3DES keys support in PKCS12 keystore
• ... and 36 more: https://git.openjdk.java.net/jdk/compare/1a94ebc7d79ba1df2c053cfcd331ba185ea91718...master

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.

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

[DamonFool]

Looks good.

Thanks @iwanowww for your review.
May I get a second review for this change?
Thanks.

[adinn]

This is arguably trivial and needs no review but here is one anyway.

[DamonFool]

This is arguably trivial and needs no review but here is one anyway.

Thanks @adinn for your review.
Pushed.

/integrate

[openjdk]

Pushed as commit 591e7e2.