RFR: 8320209: VectorMaskGen clobbers rflags on x86_64

[Sandhya Viswanathan]

On Wed, 15 Nov 2023 22:31:50 GMT, Sandhya Viswanathan <sviswanathan 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.

Thanks for the reviews!

-------------

PR Comment: https://git.openjdk.org/jdk/pull/16680#issuecomment-1814804186