[vector] Vector compare and miscellaneous cleanup for x86

[Rukmannagari, Shravya]

Hi Sandhya,
The patch looks good to me.

Thanks,
Shravya.

From: Viswanathan, Sandhya
Sent: Wednesday, February 12, 2020 1:36 PM
To: panama-dev at openjdk.java.net; Rukmannagari, Shravya <shravya.rukmannagari at intel.com>
Subject: [vector] Vector compare and miscellaneous cleanup for x86

Please find below a weberv which does the following:
1)      Merges vector compare instructs where possible
2)      Removes redundant operands from x86.ad
3)      Removes SubReduction node

http://cr.openjdk.java.net/~sviswanathan/vectorIntrinsics/CmpCleanup/webrev.00/

Best Regards,
Sandhya