RFR: 8320209: VectorMaskGen clobbers rflags on x86_64

[Sandhya Viswanathan]

On Wed, 15 Nov 2023 23:48:21 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

>> VectorMaskGen clobbers rflags on x86_64 but the corresponding instruct in x86.ad file doesn't list the rflags as being killed.
>> Adding rFlagsReg cr as being killed in effects for vmask_gen instruct.
>
> Looks good.

Thanks a lot @vnkozlov for the review.

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PR Comment: https://git.openjdk.org/jdk/pull/16680#issuecomment-1813538740