8266480: Implicit null check optimization does not update control of hoisted memory operation

[TheRealMDoerr]

JDK-8266480 should get backported for parity with 11.0.13-oracle. Applies cleanly.

---

Progress

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

Issue

• JDK-8266480: Implicit null check optimization does not update control of hoisted memory operation

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.java.net/jdk11u-dev pull/63/head:pull/63
$ git checkout pull/63

Update a local copy of the PR:
$ git checkout pull/63
$ git pull https://git.openjdk.java.net/jdk11u-dev pull/63/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 63

View PR using the GUI difftool:
$ git pr show -t 63

Using diff file

Download this PR as a diff file:
https://git.openjdk.java.net/jdk11u-dev/pull/63.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:

8266480: Implicit null check optimization does not update control of hoisted memory operation

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 (a2b2eaca)

[TheRealMDoerr]

/integrate

[openjdk]

Going to push as commit f56d1f6.
Since your change was applied there have been 8 commits pushed to the master branch:

• 2c2cc74: 8261496: Shenandoah: reconsider pacing updates memory ordering
• a092a17: 8266813: Shenandoah: Use shorter instruction sequence for checking if marking in progress
• 80a72de: 8266018: Shenandoah: fix an incorrect assert
• a0958a8: 8210959: JShell fails and exits when statement throws an exception whose message contains a '%'.
• 66d4ee9: 8247421: [TESTBUG] ReturnBlobToWrongHeapTest.java failed allocating blob
• df587c7: 8264752: SIGFPE crash with option FlightRecorderOptions:threadbuffersize=30M
• c39f3f7: 8193214: Incorrect annotations.without.processors warnings with JDK 9
• 34d1c92: 8231717: Improve performance of charset decoding when charset is always compactable

Your commit was automatically rebased without conflicts.

[openjdk]

@TheRealMDoerr Pushed as commit f56d1f6.

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