JDK-8303949: gcc10 warning Linux ppc64le - note: the layout of aggregates containing vectors with 8-byte alignment has changed in GCC 5

[MBaesken]

When switching from gcc8 to gcc10 on Linux ppc64le, we get dozens of warnings in hotspot and other sources like this

adaptiveSizePolicy.cpp:262:6: note: the layout of aggregates containing vectors with 8-byte alignment has changed in GCC 5

Probably it would make sense to suppress the warning, -Wno-psabi might be an option.
Some info about this :

https://patches.dpdk.org/project/dpdk/patch/20210623161620.49916-1-drc@linux.vnet.ibm.com/

https://stackoverflow.com/questions/52020305/what-exactly-does-gccs-wpsabi-option-do-what-are-the-implications-of-supressi

---

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Issue

• JDK-8303949: gcc10 warning Linux ppc64le - note: the layout of aggregates containing vectors with 8-byte alignment has changed in GCC 5

Reviewers

• Erik Joelsson (@erikj79 - Reviewer)
• Martin Doerr (@TheRealMDoerr - Reviewer)

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@MBaesken This change now passes all automated pre-integration checks.

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After integration, the commit message for the final commit will be:

8303949: gcc10 warning Linux ppc64le - note: the layout of aggregates containing vectors with 8-byte alignment has changed in GCC 5

Reviewed-by: erikj, mdoerr

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At the time when this comment was updated there had been 3 new commits pushed to the master branch:

• 6d30bbe: 8303001: Add test for re-entrant upcalls
• de9f3b6: 8296400: pointCrlIssuers might be null in DistributionPointFetcher::verifyURL
• b9951dd: 8303820: Simplify type metadata

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[TheRealMDoerr]

LGTM. Thanks!

[MBaesken]

Hi Erik and Martin, thanks for the reviews !

/integrate

[openjdk]

Going to push as commit a32ee5d.
Since your change was applied there have been 4 commits pushed to the master branch:

• 01312a0: 8300821: UB: Applying non-zero offset to non-null pointer 0xfffffffffffffffe produced null pointer
• 6d30bbe: 8303001: Add test for re-entrant upcalls
• de9f3b6: 8296400: pointCrlIssuers might be null in DistributionPointFetcher::verifyURL
• b9951dd: 8303820: Simplify type metadata

Your commit was automatically rebased without conflicts.

[openjdk]

@MBaesken Pushed as commit a32ee5d.

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