[jdk21u-dev] RFR: 8316893: Compile without -fno-delete-null-pointer-checks

[SendaoYan]

On Sat, 23 Nov 2024 02:35:55 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.
> 
> 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

GHA report a failure:

1. linux-x86-hs / build (debug) job at `Get JTReg` stage fails `wget exited with exit code 4`, seems like environmental issue or infra issue, it's unrelated to this PR.

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PR Comment: https://git.openjdk.org/jdk21u-dev/pull/1178#issuecomment-2495458132