8275847: Scheduling fails with "too many D-U pinch points" on small method

[GoeLin]

I backport this for parity with 17.0.3-oracle.

---

Progress

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Issue

• JDK-8275847: Scheduling fails with "too many D-U pinch points" on small method

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.java.net/jdk17u-dev pull/134/head:pull/134
$ git checkout pull/134

Update a local copy of the PR:
$ git checkout pull/134
$ git pull https://git.openjdk.java.net/jdk17u-dev pull/134/head

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Checkout this PR locally:
$ git pr checkout 134

View PR using the GUI difftool:
$ git pr show -t 134

Using diff file

Download this PR as a diff file:
https://git.openjdk.java.net/jdk17u-dev/pull/134.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:

8275847: Scheduling fails with "too many D-U pinch points" on small method

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[mlbridge]

Webrevs

• 00: Full (ef9770e5)

[GoeLin]

/integrate

[openjdk]

Going to push as commit ff3eec1.
Since your change was applied there have been 13 commits pushed to the master branch:

• 5d54bf5: 8274944: AppCDS dump causes SEGV in VM thread while adjusting lambda proxy class info
• e459c8c: 8275874: [JVMCI] only support aligned reads in c2v_readFieldValue
• 0b51fe2: 8271506: Add ResourceHashtable support for deleting selected entries
• 6cacf9a: 8278381: [GCC 11] Address::make_raw() does not initialize rspec
• c03b95d: 8279124: VM does not handle SIGQUIT during initialization
• 45002c0: 8277497: Last column cell in the JTable row is read as empty cell
• 592adc8: 8278604: SwingSet2 table demo does not have accessible description set for images
• 952f9c7: 8275645: [JVMCI] avoid unaligned volatile reads on AArch64
• 869bb36: 8280414: Memory leak in DefaultProxySelector
• c581598: 8273381: Assert in PtrQueueBufferAllocatorTest.stress_free_list_allocator_vm
• ... and 3 more: https://git.openjdk.java.net/jdk17u-dev/compare/7a5a8abe9ec10983fc86842a282f6ea39261dfbc...master

Your commit was automatically rebased without conflicts.

[openjdk]

@GoeLin Pushed as commit ff3eec1.

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