RFR: 8326135: Enhance adlc to report unused operands [v4]

[kuaiwei]

On Thu, 22 Feb 2024 07:39:32 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

>> I think adlc is almost a stand alone tool, it only depends on src/hotspot/share/opto/opcodes.cpp . Could we move it to src/utils?
>
> Why you want to move it? It depends on C2 sources and used only for VM build.

I'm thinking if it can be out of hotspot and use stl in code.

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PR Review Comment: https://git.openjdk.org/jdk/pull/17910#discussion_r1498884718