RFR: 8343629: More MergeStore benchmark

[Emanuel Peter]

On Thu, 14 Nov 2024 05:55:24 GMT, Shaojin Wen <swen at openjdk.org> wrote:

>>> @eme64 Why is there no noticeable difference in the performance of +/-MergeStores
>> 
>> What did you do to find out yourself? Did you use the trace flags to see if there is a difference in what is optimized / the output assembly code?
>
> @eme64 Are there plans to support MergeLoad, and big-endian MergeStore on little-endian machines?

@wenshao Ah. I only just realized it: you have a lot of `get` benchmarks... they don't really belong to `MergeStores`... if anything you could put them in a separate `MergeLoads` benchmark!

Also: now we have lots of data here. But data alone is kind of pointless. We need analysis to see **what patterns** and **why** they get speedups.

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PR Comment: https://git.openjdk.org/jdk/pull/21659#issuecomment-2475640074