RFR: 8307513: C2: intrinsify Math.max(long,long) and Math.min(long,long) [v3]

[Per Minborg]

On Fri, 27 Sep 2024 17:42:25 GMT, Andrew Haley <aph at openjdk.org> wrote:

> > The only situation where this PR is a regression compared to current code is when the one of the branch side is always taken.
> 
> Bear in mind that's quite common. It's not very unusual to clip a range with something equivalent to `x = min(max(x, lowest), highest)`. What does benchmarking that look like, when all the `x` are within that range?

In fact, the new `Math::clamp` methods do just this.

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PR Comment: https://git.openjdk.org/jdk/pull/20098#issuecomment-2382197333