8303279: C2: crash in SubTypeCheckNode::sub() at IGVN split if

[benty-amzn]

Backport is clean

---

Progress

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

Issue

• JDK-8303279: C2: crash in SubTypeCheckNode::sub() at IGVN split if (Bug - P3)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk21u.git pull/9/head:pull/9
$ git checkout pull/9

Update a local copy of the PR:
$ git checkout pull/9
$ git pull https://git.openjdk.org/jdk21u.git pull/9/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 9

View PR using the GUI difftool:
$ git pr show -t 9

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk21u/pull/9.diff

Webrev

Link to Webrev Comment

[bridgekeeper]

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[openjdk]

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

[openjdk]

@benty-amzn 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:

8303279: C2: crash in SubTypeCheckNode::sub() at IGVN split if

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[mlbridge]

Webrevs

• 00: Full (c8e90ad0)

[kevinrushforth]

This is already fixed in jdk21 here, so there is no need to backport it to jdk21u. All commits from jdk21 are periodically synced into jdk21u.

[benty-amzn]

Should've checked both repos first, my mistake :) Closing this