8295116: C2: assert(dead->outcnt() == 0 && !dead->is_top()) failed: node must be dead

[GoeLin]

I backport this for parity with 17.0.7-oracle.

---

Progress

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Issue

• JDK-8295116: C2: assert(dead->outcnt() == 0 && !dead->is_top()) failed: node must be dead

Reviewing

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Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk17u-dev pull/1057/head:pull/1057
$ git checkout pull/1057

Update a local copy of the PR:
$ git checkout pull/1057
$ git pull https://git.openjdk.org/jdk17u-dev pull/1057/head

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Checkout this PR locally:
$ git pr checkout 1057

View PR using the GUI difftool:
$ git pr show -t 1057

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk17u-dev/pull/1057.diff

[bridgekeeper]

👋 Welcome back goetz! 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]

@GoeLin 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:

8295116: C2: assert(dead->outcnt() == 0 && !dead->is_top()) failed: node must be dead

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At the time when this comment was updated there had been no new commits pushed to the master branch. If another commit should be pushed before you perform the /integrate command, your PR will be automatically rebased. If you prefer to avoid any potential automatic rebasing, please check the documentation for the /integrate command for further details.

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[mlbridge]

Webrevs

• 00: Full (8690b0fd)

[GoeLin]

/integrate

[openjdk]

Going to push as commit 772f90a.
Since your change was applied there have been 8 commits pushed to the master branch:

• 08e30d0: 8297951: C2: Create skeleton predicates for all If nodes in loop predication
• f8a8417: 8299388: java/util/regex/NegativeArraySize.java fails on Alpine and sometimes Windows
• ead3081: 8296619: Upgrade jQuery to 3.6.1
• 0db4add: 8286707: JFR: Don't commit JFR internal jdk.JavaMonitorWait events
• eceb480: 8267038: Update IANA Language Subtag Registry to Version 2022-03-02
• ffecc39: 8295788: C2 compilation hits "assert((mode == ControlAroundStripMined && use == sfpt) || !use->is_reachable_from_root()) failed: missed a node"
• 520ae87: 8284165: Add pid to process reaper thread name
• 3722edc: 8284726: Print active locale settings in hs_err reports and in VM.info

Your commit was automatically rebased without conflicts.

[openjdk]

@GoeLin Pushed as commit 772f90a.

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