8233743: AArch64: Make r27 conditionally allocatable

[dchuyko]

This is a prerequisite for JDK-8242449.
JVMCI and ZGC parts from original patch are not necessary for 11u: JDK-8231754 was not backported - no need to revert, Z for aarch64 has not been backported.

Testing: tier1, tier2 (aarch64).

---

Progress

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

Issue

• JDK-8233743: AArch64: Make r27 conditionally allocatable

Reviewers

• Paul Hohensee (@phohensee - Reviewer)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.java.net/jdk11u-dev pull/136/head:pull/136
$ git checkout pull/136

Update a local copy of the PR:
$ git checkout pull/136
$ git pull https://git.openjdk.java.net/jdk11u-dev pull/136/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 136

View PR using the GUI difftool:
$ git pr show -t 136

Using diff file

Download this PR as a diff file:
https://git.openjdk.java.net/jdk11u-dev/pull/136.diff

[bridgekeeper]

👋 Welcome back dchuyko! 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.

[mlbridge]

Webrevs

• 00: Full (3b99f9ac)

[dchuyko]

PR for the main issue #137

[bridgekeeper]

@dchuyko 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 add a new comment to the pull request. Feel free to ask for assistance if you need help with progressing this pull request towards integration!

[phohensee]

Lgtm.

[openjdk]

@dchuyko This change now passes all automated pre-integration checks.

After integration, the commit message for the final commit will be:

8233743: AArch64: Make r27 conditionally allocatable

Reviewed-by: phh

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 408 new commits pushed to the master branch:

• 25c33bc: 8239422: [TESTBUG] compiler/c1/TestPrintIRDuringConstruction.java failed when C1 is disabled
• 00255bd: 8263068: Rename safefetch.hpp to safefetch.inline.hpp
• 1297c26: 8275051: Shenandoah: Correct ordering of requested gc cause and gc request flag
• 4b6e487: 8197800: Test java/awt/Focus/NonFocusableWindowTest/NoEventsTest.java fails on Windows
• 5a2b2ac: 8198619: java/awt/Focus/FocusTraversalPolicy/ButtonGroupLayoutTraversal/ButtonGroupLayoutTraversalTest.java fails on mac
• b449303: 8171998: javax/swing/JMenu/4692443/bug4692443.java fails on Windows
• cdc48c2: 8256201: java/awt/FullScreen/FullscreenWindowProps/FullscreenWindowProps.java failed
• 93e98ad: 8266579: Update test/jdk/java/lang/ProcessHandle/PermissionTest.java & test/jdk/java/sql/testng/util/TestPolicy.java
• 1772cf1: 8272708: [Test]: Cleanup: test/jdk/security/infra/java/security/cert/CertPathValidator/certification/BuypassCA.java no longer needs ocspEnabled
• 0f9d6bf: 8247510: typo in IllegalHandshakeMessage
• ... and 398 more: https://git.openjdk.java.net/jdk11u-dev/compare/2252165499c4246de281f56609a3d4910605f7c9...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.

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➡️ To flag this PR as ready for integration with the above commit message, type /integrate in a new comment. (Afterwards, your sponsor types /sponsor in a new comment to perform the integration).

[bridgekeeper]

@dchuyko 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 add a new comment to the pull request. Feel free to ask for assistance if you need help with progressing this pull request towards integration!

[bridgekeeper]

@dchuyko This pull request has been inactive for more than 8 weeks and will now be automatically closed. If you would like to continue working on this pull request in the future, feel free to reopen it! This can be done using the /open pull request command.