8310130: C2: assert(false) failed: scalar_input is neither phi nor a matchin reduction

[TobiHartmann]

Backport of JDK-8310130. Applies cleanly.

Thanks,
Tobias

---

Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• JDK-8310130: C2: assert(false) failed: scalar_input is neither phi nor a matchin reduction (Bug - P3)

Reviewers

• Vladimir Kozlov (@vnkozlov - Reviewer)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk21.git pull/77/head:pull/77
$ git checkout pull/77

Update a local copy of the PR:
$ git checkout pull/77
$ git pull https://git.openjdk.org/jdk21.git pull/77/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 77

View PR using the GUI difftool:
$ git pr show -t 77

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk21/pull/77.diff

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Link to Webrev Comment

[bridgekeeper]

👋 Welcome back thartmann! 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.

[openjdk]

@TobiHartmann The following label will be automatically applied to this pull request:

• hotspot-compiler

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[mlbridge]

Webrevs

• 00: Full (f3bc6d44)

[vnkozlov]

Good.

[openjdk]

@TobiHartmann 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:

8310130: C2: assert(false) failed: scalar_input is neither phi nor a matchin reduction

Reviewed-by: kvn

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 master branch:

• 359bd63: 8305671: javac rejects semicolons in compilation units with no imports

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

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

[TobiHartmann]

Thanks, Vladimir.

[TobiHartmann]

/integrate

[openjdk]

Going to push as commit 687863d.
Since your change was applied there have been 2 commits pushed to the master branch:

• ed98bd7: 8292704: sun/security/tools/jarsigner/compatibility/Compatibility.java use wrong key size for EC
• 359bd63: 8305671: javac rejects semicolons in compilation units with no imports

Your commit was automatically rebased without conflicts.

[openjdk]

@TobiHartmann Pushed as commit 687863d.

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