8277529: SIGSEGV in C2 CompilerThread Node::rematerialize() compiling Packet::readUnsignedTrint

[TheRealMDoerr]

Backport of 8277529: SIGSEGV in C2 CompilerThread Node::rematerialize() compiling Packet::readUnsignedTrint
New implementation taken from 17u backport openjdk/jdk17u@aa11a93
That fits into 11u with one trivial manual integration of initialization _data_dependency_on(NULL).

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Progress

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

Issue

• JDK-8277529: SIGSEGV in C2 CompilerThread Node::rematerialize() compiling Packet::readUnsignedTrint

Reviewers

• Goetz Lindenmaier (@GoeLin - Reviewer)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.java.net/jdk11u pull/21/head:pull/21
$ git checkout pull/21

Update a local copy of the PR:
$ git checkout pull/21
$ git pull https://git.openjdk.java.net/jdk11u pull/21/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 21

View PR using the GUI difftool:
$ git pr show -t 21

Using diff file

Download this PR as a diff file:
https://git.openjdk.java.net/jdk11u/pull/21.diff

[bridgekeeper]

👋 Welcome back mdoerr! 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 (e319f659)

[GoeLin]

LGTM

[openjdk]

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

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

8277529: SIGSEGV in C2 CompilerThread Node::rematerialize() compiling Packet::readUnsignedTrint

Reviewed-by: goetz

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 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.

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

[TheRealMDoerr]

Thanks for the review and the approval!
/integrate

[openjdk]

Going to push as commit d665a4e.

[openjdk]

@TheRealMDoerr Pushed as commit d665a4e.

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