RFR: 8343070: Enable is_trace_align_vector when TraceSuperWord is set

[Emanuel Peter]

On Fri, 25 Oct 2024 14:45:33 GMT, Hamlin Li <mli at openjdk.org> wrote:

> Hi,
> Can you help to review this simple patch?
> Currently, in SuperWord::filter_packs_for_alignment(), there is some log not turned on when TraceSuperWord is set, but I think it should, as it's more convenient for users to debug.
> Thanks!

@Hamlin-Li There is a lot of tracing in SuperWord. You have very fine-grained control with `TraceAutoVectorization`, and in my opinion `TraceSuperWord` should just be a "summary", and quickly readable to get a hint. You can use `-XX:CompileCommand=TraceAutoVectorization,*::*,ALIGN_VECTOR`.

If you do think we should add the align vector tracing into `TraceSuperWord`, then I would like to hear from you what other tracing you would add, and what not. What do you think?

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PR Comment: https://git.openjdk.org/jdk/pull/21715#issuecomment-2440685811