RFR: 8272315: Improve assert_different_registers

[Vladimir Ivanov]

On Wed, 11 Aug 2021 12:51:53 GMT, Andrew Dinn <adinn at openjdk.org> wrote:

>> Well, a nested loop is order n^2 but n is always going to be pretty small (the old code allowed for 12 but cases with n > 6 are rare). So I see no great perf problem with using a nested loop.
>
> ... bearing in mind that quicksort is n.log(n) at best.

> Sorting is kind of overkill. Maybe I should have just use the obvious nested loop? What do reviewers think?

No strong preference on my side. I'm fine with it either way.

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PR: https://git.openjdk.java.net/jdk/pull/5083