[jdk21u-dev] RFR: 8316907: Fix nonnull-compare warnings

[SendaoYan]

On Thu, 21 Nov 2024 07:38:30 GMT, SendaoYan <syan at openjdk.org> wrote:

> Hi all,
> There are some gcc compile warnings which recorded by [JDK-8342304](https://bugs.openjdk.org/browse/JDK-8342304) on linux-riscv64 platform, and the PR [JDK-8316893](https://bugs.openjdk.org/browse/JDK-8316893) fix the gcc compile warnings. So I want to backport [JDK-8316893](https://bugs.openjdk.org/browse/JDK-8316893) to jdk21u-dev. But before backport [JDK-8316893](https://bugs.openjdk.org/browse/JDK-8316893), we should backport [JDK-8316907](https://bugs.openjdk.org/browse/JDK-8316907) first, [JDK-8316907](https://bugs.openjdk.org/browse/JDK-8316907) solve  nonnull-compare warnings emitted by GCC after removing `-fno-delete-null-pointer-checks`.
> 
> Additional testing:
> 
> - [x] 1. jtreg tests(include tier1/2/3 etc.) with linux-x64 release build
> - [x] 2. jtreg tests(include tier1/2/3 etc.) with linux-x64 fastdebug build
> - [x] 3. jtreg tests(include tier1/2/3 etc.) with linux-aarch64 release build
> - [x] 4. jtreg tests(include tier1/2/3 etc.) with linux-aarch64 fastdebug build

Thanks for the approved.

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PR Comment: https://git.openjdk.org/jdk21u-dev/pull/1172#issuecomment-2494041899