RFR: 8252505: C1/C2 compiler support for blackholes [v23]

[Vladimir Ivanov]

On Fri, 4 Dec 2020 09:49:16 GMT, Vladimir Ivanov <vlivanov at openjdk.org> wrote:

>> Well, if users want to shun the warning, then they should not put incorrect compiler commands to JVM. For example, JMH does run with `quiet` to silence the "successful" command output, and I still want JVM to show warning messages when people put a `@CompilerControl(BLACKHOLE)` on a wrong method. It is better UX.
>
> Then check `PrintWarnings`? It's an explicit user request to silent JVM warnings on output stream.

I agree now that `CompileCommand=quiet` is not appropriate here.

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PR: https://git.openjdk.java.net/jdk/pull/1203