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

[Quan Anh Mai]

On Fri, 9 Sep 2022 10:09:17 GMT, Tobias Hartmann <thartmann at openjdk.org> wrote:

>> Quan Anh Mai has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains ten additional commits since the last revision:
>> 
>>  - Merge branch 'master' into cloneSimpleNodes
>>  - fix
>>  - Merge branch 'master' into cloneSimpleNodes
>>  - shorten
>>  - improve checks
>>  - lea patterns
>>  - refactor
>>  - lea patterns
>>  - first commit
>
> 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.

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