RFR: 8292761: x86: Clone nodes to match complex rules [v2]

[Sandhya Viswanathan]

On Sat, 17 Sep 2022 12:23:35 GMT, Quan Anh Mai <qamai at openjdk.org> wrote:

>> Please include the benchmark in the patch. Could you show the generated code before/after? Thanks!
>
> Thank @TobiHartmann @chhagedorn for your comments, I have updated the PR to address those.

@merykitty Do you plan to get this optimization in? I had only one comment (October 18). Please take a look.

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PR: https://git.openjdk.org/jdk/pull/9977