8268366 Incorrect calculation of has_fpu_registers in C1 linear scan

[dean-long]

If there is a mismatch between bytecode use of floating point and generated IR, has_fpu_registers can get an incorrect value and result in a crash or assert. This PR adds a missing case for the computation of has_fpu_registers, restores an assert that was removed, adds a bailout for non-debug builds, and adds a test.

---

Progress

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Issue

• JDK-8268366: Incorrect calculation of has_fpu_registers in C1 linear scan

Reviewers

• Vladimir Kozlov (@vnkozlov - Reviewer) ⚠️ Review applies to 853d942
• Christian Hagedorn (@chhagedorn - Reviewer)

Reviewing

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Checkout this PR locally:
$ git fetch https://git.openjdk.java.net/jdk17 pull/10/head:pull/10
$ git checkout pull/10

Update a local copy of the PR:
$ git checkout pull/10
$ git pull https://git.openjdk.java.net/jdk17 pull/10/head

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$ git pr checkout 10

View PR using the GUI difftool:
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Download this PR as a diff file:
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[openjdk]

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[mlbridge]

Webrevs

• 01: Full - Incremental (90c8c8f1)
• 00: Full (853d9428)

[openjdk]

@dean-long 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:

8268366: Incorrect calculation of has_fpu_registers in C1 linear scan

Reviewed-by: kvn, 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 8 new commits pushed to the master branch:

• 6171ae4: 8268630: ProblemList serviceability/jvmti/CompiledMethodLoad/Zombie.java on linux-aarch64
• 01054e6: 8268470: CDS dynamic dump asserts with JFR RecordingStream
• e39346e: 8268093: Manual Testcase: "sun/security/krb5/config/native/TestDynamicStore.java" Fails with NPE
• cce8da2: 8268602: a couple runtime/os tests don't check exit code
• da043e9: 8268555: Update HttpClient tests that use ITestContext to jtreg 6+1
• a437ce8: 8268580: runtime/memory/LargePages/TestLargePagesFlags.java should be run in driver mode
• bd9c2fa: 8268565: runtime/records/RedefineRecord.java should be run in driver mode
• e3eef3b: 8268576: jdk/jfr/event/gc/collection/TestSystemGc.java fails

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.

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[dean-long]

Thanks @vnkozlov

[chhagedorn]

Otherwise, the fix looks good.

[chhagedorn]

Looks good, thanks for the changes!

[dean-long]

Thanks Christian.

[dean-long]

/integrate

[openjdk]

Going to push as commit 702e3ff.
Since your change was applied there have been 13 commits pushed to the master branch:

• bca914b: 8268670: yield statements doesn't allow ~ or ! unary operators in expression
• c088d09: 8268522: InstanceKlass::can_be_verified_at_dumptime() returns opposite value
• abe20c1: 8268333: javac crashes when pattern matching switch contains default case which is not last
• b318535: 8267579: Thread::cooked_allocated_bytes() hits assert(left >= right) failed: avoid underflow
• fe48ea9: 8268342: java/foreign/channels/TestAsyncSocketChannels.java fails with "IllegalStateException: This segment is already closed"
• 6171ae4: 8268630: ProblemList serviceability/jvmti/CompiledMethodLoad/Zombie.java on linux-aarch64
• 01054e6: 8268470: CDS dynamic dump asserts with JFR RecordingStream
• e39346e: 8268093: Manual Testcase: "sun/security/krb5/config/native/TestDynamicStore.java" Fails with NPE
• cce8da2: 8268602: a couple runtime/os tests don't check exit code
• da043e9: 8268555: Update HttpClient tests that use ITestContext to jtreg 6+1
• ... and 3 more: https://git.openjdk.java.net/jdk17/compare/7b2e7d8bab890bd655093976cc9c3b0b6d00c034...master

Your commit was automatically rebased without conflicts.

[openjdk]

@dean-long Pushed as commit 702e3ff.

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