8223923: C2: Missing interference with mismatched unsafe accesses

[shipilev]

Clean backport to fix C2 bug.

Additional testing:

• New test fails without the C2 fix, passes with it
• Linux x86_64 tier1 passes with the fix

---

Progress

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

Issue

• JDK-8223923: C2: Missing interference with mismatched unsafe accesses

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.java.net/jdk11u-dev pull/276/head:pull/276
$ git checkout pull/276

Update a local copy of the PR:
$ git checkout pull/276
$ git pull https://git.openjdk.java.net/jdk11u-dev pull/276/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 276

View PR using the GUI difftool:
$ git pr show -t 276

Using diff file

Download this PR as a diff file:
https://git.openjdk.java.net/jdk11u-dev/pull/276.diff

[bridgekeeper]

👋 Welcome back shade! 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]

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

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

8223923: C2: Missing interference with mismatched unsafe accesses

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.

[mlbridge]

Webrevs

• 01: Full - Incremental (3b35f191)
• 00: Full (05d4154b)

[shipilev]

Got the push approval. The GHA test failure is not related to this patch.

/integrate

[openjdk]

Going to push as commit 89ee611.
Since your change was applied there have been 9 commits pushed to the master branch:

• f12af7e: 8266182: Automate manual steps listed in the test jdk/sun/security/pkcs12/ParamsTest.java
• 28dec4f: 8223139: Rename mandatory policy-do routines.
• e1cbfa5: 8248187: [TESTBUG] javax/swing/plaf/basic/BasicGraphicsUtils/8132119/bug8132119.java fails with String is not properly drawn
• 6a784d2: 8143021: [TEST_BUG] Test javax/swing/JColorChooser/Test6541987.java fails
• 09ad2c0: 8256152: tests fail because of ambiguous method resolution
• 2990ff0: 8211171: move JarUtils to top-level testlibrary
• f7a75de: 8265524: Upgrading JSZip from v3.2.2 to v3.6.0
• 9f8c13c: 8233569: [TESTBUG] JTextComponent test bug6361367.java fails on macos
• a6ee356: 8234823: java/net/Socket/Timeouts.java testcase testTimedConnect2() fails on Windows 10

Your commit was automatically rebased without conflicts.

[openjdk]

@shipilev Pushed as commit 89ee611.

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