RFR: 8286182: C2: crash with SIGFPE when executing compiled code

[Martin Doerr]

On Mon, 16 May 2022 12:36:43 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:

> The bug is not assigned to me, but I have seen that the C2 code which checks for div by 0 is not aware of the new nodes from [JDK-8284742](https://bugs.openjdk.java.net/browse/JDK-8284742).
> This fixes the VM to pass the reproducer. I'm not sure if more opcode checks are required to get added.

I agree, too. Catching SIGFPE was an interesting experiment, but I didn't want to propose it as fix.
If we decide for a complete backout of [JDK-8284742](https://bugs.openjdk.java.net/browse/JDK-8284742), we need to backout [JDK-8285390](https://bugs.openjdk.java.net/browse/JDK-8285390) as well. (Alternatively, we could only revert the x86 parts. Current implementation works on PPC64.)

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PR: https://git.openjdk.java.net/jdk/pull/8726