RFR: 8291649: multiple tests failing with -Xcomp after JDK-8290034

[Kim Barrett]

On Tue, 23 Aug 2022 17:58:39 GMT, Jatin Bhateja <jbhateja at openjdk.org> wrote:

> Hi,
> 
> This bug fix patch fixes the incorrect computation during constant folding of Reverse[IL] IR node.
> A new utility class has been added to optimize computation of reverse_bit operation using GCC built-ins.
> 
> Kindly review and share your feedback.
> 
> Best Regards,
> Jatin

Changes requested by kbarrett (Reviewer).

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PR: https://git.openjdk.org/jdk/pull/9987