8323122: AArch64: Increase itable stub size estimate

[dchuyko]

This is a tiny safety follow-up to JDK-8307352 (AARCH64: Improve itable_stub). Original change applies cleanly.

Testing: jtreg tier1,2 on linux-aarch64.

---

Progress

• Change must not contain extraneous whitespace
• JDK-8323122 needs maintainer approval
• Commit message must refer to an issue

Issue

• JDK-8323122: AArch64: Increase itable stub size estimate (Enhancement - P4 - Approved)

Reviewers

• Andrew Haley (@theRealAph - Reviewer)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk21u-dev.git pull/711/head:pull/711
$ git checkout pull/711

Update a local copy of the PR:
$ git checkout pull/711
$ git pull https://git.openjdk.org/jdk21u-dev.git pull/711/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 711

View PR using the GUI difftool:
$ git pr show -t 711

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk21u-dev/pull/711.diff

Webrev

Link to Webrev Comment

[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]

@dchuyko 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:

8323122: AArch64: Increase itable stub size estimate

Reviewed-by: aph

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 9 new commits pushed to the master branch:

• 622026a: 8316756: C2 EA fails with "missing memory path" when encountering unsafe_arraycopy stub call
• 807a4b6: 8324174: assert(m->is_entered(current)) failed: invariant
• 03facb9: 8332905: C2 SuperWord: bad AD file, with RotateRightV and first operand not a pack
• 4cd947b: 8327423: C2 remove_main_post_loops: check if main-loop belongs to pre-loop, not just assert
• ea2aa9e: 8324969: C2: prevent elimination of unbalanced coarsened locking regions
• fa896c7: 8333366: C2: CmpU3Nodes are not pushed back to worklist in PhaseCCP leading to non-fixpoint assertion failure
• 9dca67b: 8332959: C2: ZGC fails with 'Incorrect load shift' when invoking Object.clone() reflectively on an array
• 6a83392: 8323682: C2: guard check is not generated in Arrays.copyOfRange intrinsic when allocation is eliminated by EA
• d13f75c: 8331863: DUIterator_Fast used before it is constructed

Please see this link for an up-to-date comparison between the source branch of this pull request and the master branch.
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[openjdk]

This backport pull request has now been updated with issue from the original commit.

[openjdk]

⚠️ @dchuyko 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.

[mlbridge]

Webrevs

• 00: Full (acb486bc)

[dchuyko]

/approval request This is a tiny follow-up to JDK-8307352 (AARCH64: Improve itable_stub) backport. The estimate is raised a bit for safety. Original change applies cleanly after the leading backport.

Testing: jtreg tier1,2 on linux-aarch64.

[openjdk]

@dchuyko
8323122: The approval request has been created successfully.

[dchuyko]

/integrate

[openjdk]

@dchuyko
Your change (at version acb486b) is now ready to be sponsored by a Committer.

[TheRealMDoerr]

/sponsor

[openjdk]

Going to push as commit 1831a95.
Since your change was applied there have been 9 commits pushed to the master branch:

• 622026a: 8316756: C2 EA fails with "missing memory path" when encountering unsafe_arraycopy stub call
• 807a4b6: 8324174: assert(m->is_entered(current)) failed: invariant
• 03facb9: 8332905: C2 SuperWord: bad AD file, with RotateRightV and first operand not a pack
• 4cd947b: 8327423: C2 remove_main_post_loops: check if main-loop belongs to pre-loop, not just assert
• ea2aa9e: 8324969: C2: prevent elimination of unbalanced coarsened locking regions
• fa896c7: 8333366: C2: CmpU3Nodes are not pushed back to worklist in PhaseCCP leading to non-fixpoint assertion failure
• 9dca67b: 8332959: C2: ZGC fails with 'Incorrect load shift' when invoking Object.clone() reflectively on an array
• 6a83392: 8323682: C2: guard check is not generated in Arrays.copyOfRange intrinsic when allocation is eliminated by EA
• d13f75c: 8331863: DUIterator_Fast used before it is constructed

Your commit was automatically rebased without conflicts.

[openjdk]

@TheRealMDoerr @dchuyko Pushed as commit 1831a95.

💡 You may see a message that your pull request was closed with unmerged commits. This can be safely ignored.