8308103: Massive (up to ~30x) increase in C2 compilation time since JDK 17

[GoeLin]

I backport this for parity with 17.0.10-oracle.

The backport deferral was meant for 21, not 21u. After it being backported to 17.0.10-oracle,
the risk of bringing it to 21u should be acceptable as this will have much less exposure.

Test passes (including 8312440). Will run it through SAPs testing.

Will make dependent PR for JDK-8312440.

---

Progress

• JDK-8308103 needs maintainer approval
• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• JDK-8308103: Massive (up to ~30x) increase in C2 compilation time since JDK 17 (Bug - P3 - Approved)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk21u.git pull/199/head:pull/199
$ git checkout pull/199

Update a local copy of the PR:
$ git checkout pull/199
$ git pull https://git.openjdk.org/jdk21u.git pull/199/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 199

View PR using the GUI difftool:
$ git pr show -t 199

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk21u/pull/199.diff

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[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 is now ready for you to apply for maintainer approval. This can be done directly in each associated issue or by using the /approval command.

[mlbridge]

Webrevs

• 00: Full (6afa4ab4)

[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:

8308103: Massive (up to ~30x) increase in C2 compilation time since JDK 17

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 9 new commits pushed to the master branch:

• b12961d: 8316933: RISC-V: compiler/vectorapi/VectorCastShape128Test.java fails when using RVV
• 8f05d86: 8316341: sun/security/pkcs11/PKCS11Test.java needs adjustment on Linux ppc64le Ubuntu 22
• d3c89cd: 8315606: Open source few swing text/html tests
• 3130e03: 8315770: serviceability/sa/TestJmapCoreMetaspace.java should run with -XX:-VerifyDependencies
• ea00fca: 8316468: os::write incorrectly handles partial write
• e2f32f1: 8316206: Test StretchedFontTest.java fails for Baekmuk font
• be274aa: 8313575: Refactor PKCS11Test tests
• ccf8451: 8316199: Remove sun/tools/jstatd/TestJstatd* tests from problemlist for Windows.
• 768592a: 8314476: TestJstatdPortAndServer.java failed with "java.rmi.NoSuchObjectException: no such object in table"

Please see this link for an up-to-date comparison between the source branch of this pull request and the master branch.
As there are no conflicts, your changes will automatically be rebased on top of these commits when integrating. If you prefer to avoid this 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.

[GoeLin]

/integrate

[openjdk]

Going to push as commit bbfbc7b.
Since your change was applied there have been 12 commits pushed to the master branch:

• 48fa33a: 8301489: C1: ShortLoopOptimizer might lift instructions before their inputs
• 89103c6: 8317257: RISC-V: llvm build broken
• b4bb944: 8316743: RISC-V: Change UseVectorizedMismatchIntrinsic option result to warning
• b12961d: 8316933: RISC-V: compiler/vectorapi/VectorCastShape128Test.java fails when using RVV
• 8f05d86: 8316341: sun/security/pkcs11/PKCS11Test.java needs adjustment on Linux ppc64le Ubuntu 22
• d3c89cd: 8315606: Open source few swing text/html tests
• 3130e03: 8315770: serviceability/sa/TestJmapCoreMetaspace.java should run with -XX:-VerifyDependencies
• ea00fca: 8316468: os::write incorrectly handles partial write
• e2f32f1: 8316206: Test StretchedFontTest.java fails for Baekmuk font
• be274aa: 8313575: Refactor PKCS11Test tests
• ... and 2 more: https://git.openjdk.org/jdk21u/compare/86a1a44a621bbd9b4c4d821cbc75d4a541e82aea...master

Your commit was automatically rebased without conflicts.

[openjdk]

@GoeLin Pushed as commit bbfbc7b.

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