8290496: riscv: Fix build warnings-as-errors with GCC 11

[feilongjiang]

Please review this backport to jdk19u.
Backport of JDK-8290496. Applies cleanly. Approval is pending.

Build without --disable-warnings-as-errors after this fix passed on unmatched board with GCC11

---

Progress

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

Issue

• JDK-8290496: riscv: Fix build warnings-as-errors with GCC 11

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk19u pull/40/head:pull/40
$ git checkout pull/40

Update a local copy of the PR:
$ git checkout pull/40
$ git pull https://git.openjdk.org/jdk19u pull/40/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 40

View PR using the GUI difftool:
$ git pr show -t 40

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk19u/pull/40.diff

[bridgekeeper]

👋 Welcome back fjiang! 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]

@feilongjiang 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:

8290496: riscv: Fix build warnings-as-errors with GCC 11

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 11 new commits pushed to the master branch:

• 30294b3: 8286314: Trampoline not created for far runtime targets outside small CodeCache
• d0b021b: 8288992: AArch64: CMN should be handled the same way as CMP
• e6bd2c9: 8290246: test fails "assert(init != __null) failed: initialization not found"
• 27158f2: 8290451: Incorrect result when switching to C2 OSR compilation from C1
• 83cb884: 8290711: assert(false) failed: infinite loop in PhaseIterGVN::optimize
• 63c53da: 8290705: StringConcat::validate_mem_flow asserts with "unexpected user: StoreI"
• 6b9fe5d: 8293044: C1: Missing access check on non-accessible class
• e8a134a: 8291775: C2: assert(r != __null && r->is_Region()) failed: this phi must have a region
• a8ca05c: 8291599: Assertion in PhaseIdealLoop::skeleton_predicate_has_opaque after JDK-8289127
• 058507f: 8290781: Segfault at PhaseIdealLoop::clone_loop_handle_data_uses
• ... and 1 more: https://git.openjdk.org/jdk19u/compare/88490ec1dc98a3b698e68c1b5eaee27efba24678...master

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.

As you do not have Committer status in this project an existing Committer must agree to sponsor your change.

➡️ To flag this PR as ready for integration with the above commit message, type /integrate in a new comment. (Afterwards, your sponsor types /sponsor in a new comment to perform the integration).

[mlbridge]

Webrevs

• 00: Full (3f9f76f4)

[feilongjiang]

Got the jdk19u-fix-yes, integrate then.
/integrate

[openjdk]

@feilongjiang
Your change (at version 3f9f76f) is now ready to be sponsored by a Committer.

[RealFYang]

/sponsor

[openjdk]

Going to push as commit 59a331a.
Since your change was applied there have been 11 commits pushed to the master branch:

• 30294b3: 8286314: Trampoline not created for far runtime targets outside small CodeCache
• d0b021b: 8288992: AArch64: CMN should be handled the same way as CMP
• e6bd2c9: 8290246: test fails "assert(init != __null) failed: initialization not found"
• 27158f2: 8290451: Incorrect result when switching to C2 OSR compilation from C1
• 83cb884: 8290711: assert(false) failed: infinite loop in PhaseIterGVN::optimize
• 63c53da: 8290705: StringConcat::validate_mem_flow asserts with "unexpected user: StoreI"
• 6b9fe5d: 8293044: C1: Missing access check on non-accessible class
• e8a134a: 8291775: C2: assert(r != __null && r->is_Region()) failed: this phi must have a region
• a8ca05c: 8291599: Assertion in PhaseIdealLoop::skeleton_predicate_has_opaque after JDK-8289127
• 058507f: 8290781: Segfault at PhaseIdealLoop::clone_loop_handle_data_uses
• ... and 1 more: https://git.openjdk.org/jdk19u/compare/88490ec1dc98a3b698e68c1b5eaee27efba24678...master

Your commit was automatically rebased without conflicts.

[openjdk]

@RealFYang @feilongjiang Pushed as commit 59a331a.

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