I'd like someone with access to AIX to try out this change: https://github.com/openjdk/jdk/pull/29497
It enables -Wzero-as-null-pointer-constant for gcc/clang. I think all of the shared and ppc code should be clean. I've fixed some cases in AIX-specific code. There might be some I missed though, as I found those by just looking at the code. So I'd like someone to try building the code from that PR and report what you find. Once I know AIX is clean I can proceed to turning on the warning.
