8265132: C2 compilation fails with assert "missing precedence edge"

[TheRealMDoerr]

Almost clean backport of JDK-8265132. Only a small hunk in block.hpp had to get inserted manually due to an unrelated context difference. Test fails in 11u without the fix.

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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-8265132: C2 compilation fails with assert "missing precedence edge"

Reviewers

• Roland Westrelin (@rwestrel - Reviewer)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.java.net/jdk11u-dev pull/124/head:pull/124
$ git checkout pull/124

Update a local copy of the PR:
$ git checkout pull/124
$ git pull https://git.openjdk.java.net/jdk11u-dev pull/124/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 124

View PR using the GUI difftool:
$ git pr show -t 124

Using diff file

Download this PR as a diff file:
https://git.openjdk.java.net/jdk11u-dev/pull/124.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.

[openjdk]

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

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

8265132: C2 compilation fails with assert "missing precedence edge"

Reviewed-by: roland

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.

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[mlbridge]

Webrevs

• 00: Full (72ec01c2)

[rwestrel]

Looks good to me.

[TheRealMDoerr]

Thanks for the review!
/integrate

[openjdk]

Going to push as commit 8d1e402.
Since your change was applied there has been 1 commit pushed to the master branch:

• cbd3b0f: 8267399: C2: java/text/Normalizer/ConformanceTest.java test failed with assertion

Your commit was automatically rebased without conflicts.

[openjdk]

@TheRealMDoerr Pushed as commit 8d1e402.

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