8277878: Fix compiler tests after JDK-8275908

[simonis]

This is a quick fix for the two compiler tests introduced by JDK-8275908. The test explicitly added SerialGC in the parameter list which leads to a garbage collector conflict, if the tests are run with some other Garbage collector.

It was suggested to fix this by adding a @requires vm.gc.Serial tag but this is not necessary because the tests are actually GC-agnostic so I've removed the -XX:+UseSerialGC parameter from the test command line instead.

After the fix it was necessary to refine the check for whether the test JVM has JVMCI support built-in. Before the fix, I used WhiteBox.getWhiteBox().isJVMCISupportedByGC() which worked fine if only running with SerialGC. Now that we can run with GCs which don't support JVMCI we have to use the more specific (WB.getBooleanVMFlag("EnableJVMCI") != null).

Please let me know if you want me to push this instantly after it has been reviewed or if you first want to re-run your internal Tier3 tests before pushing.

---

Progress

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

Issue

• JDK-8277878: Fix compiler tests after JDK-8275908

Reviewers

• Tobias Hartmann (@TobiHartmann - Reviewer)
• Christian Hagedorn (@chhagedorn - Reviewer)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.java.net/jdk pull/6581/head:pull/6581
$ git checkout pull/6581

Update a local copy of the PR:
$ git checkout pull/6581
$ git pull https://git.openjdk.java.net/jdk pull/6581/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 6581

View PR using the GUI difftool:
$ git pr show -t 6581

Using diff file

Download this PR as a diff file:
https://git.openjdk.java.net/jdk/pull/6581.diff

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[openjdk]

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[mlbridge]

Webrevs

• 00: Full (0ee1c5ba)

[TobiHartmann]

That looks good and trivial to me.

[openjdk]

@simonis 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:

8277878: Fix compiler tests after JDK-8275908

Reviewed-by: thartmann, chagedorn

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 7 new commits pushed to the master branch:

• 72bacf8: 8276108: Wrong instruction generation in aarch64 backend
• e3e5908: 8277847: Support toolGuide tag in class-level documentation
• 9a3a9b1: 8277865: G1: Change integer division to floating point division
• aed53ee: 8264838: IGV: enhance graph export functionality
• 0c7a4b8: 8277842: IGV: Add jvms property to know where a node came from
• c3a7f2f: 8277382: make c1 BlockMerger use IR::verify only when necessary
• 8f9eb62: 8274784: jshell: Garbled character was displayed by System.out.println(...) on Japanese Windows

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.

[chhagedorn]

Looks good! I guess it does not hurt to quickly verify it. Tier3 testing is submitted, will get back to you with the results.

[simonis]

Thanks @chhagedorn, @TobiHartmann!

I'll wait with submitting until @chhagedorn reports back the Tier3 results.

[dholmes-ora]

@simonis the submitted tests have passed. Thanks.

[simonis]

/integrate

[simonis]

Thanks @dholmes-ora.

[openjdk]

Going to push as commit 614c6e6.
Since your change was applied there have been 12 commits pushed to the master branch:

• 960bdde: 8277904: G1: Remove G1CardSetArray::max_entries
• 45e8973: 8277896: Remove unused BOTConstants member methods
• e5676f8: 8277450: Record number of references into collection set during gc
• 2622ab3: 8277928: Fix compilation on macosx-aarch64 after 8276108
• 37de442: 8275241: Unused ArrayList is created in RequestEngine.addHooks
• 72bacf8: 8276108: Wrong instruction generation in aarch64 backend
• e3e5908: 8277847: Support toolGuide tag in class-level documentation
• 9a3a9b1: 8277865: G1: Change integer division to floating point division
• aed53ee: 8264838: IGV: enhance graph export functionality
• 0c7a4b8: 8277842: IGV: Add jvms property to know where a node came from
• ... and 2 more: https://git.openjdk.java.net/jdk/compare/e9b36a83160d3c1fa79841692e9fadf336bf7954...master

Your commit was automatically rebased without conflicts.

[openjdk]

@simonis Pushed as commit 614c6e6.

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