RFR: JDK-8294902: Undefined Behavior in C2 regalloc with null references [v6]

[Fei Yang]

On Fri, 2 Dec 2022 18:12:21 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

>> This restriction in C++ is unnecessary, really, since AFAIK this works on all implementations.
>
> This seems to work on GCCs 9..12 in {x86_64, x86_32, aarch64}.

FYI: I have verified this also works with GCC version 11.3.0 on linux-riscv64 platform.

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PR: https://git.openjdk.org/jdk/pull/10920