RFR (S): 8154473: Update for CompilerDirectives to control stub generation and intrinsics

[Deshpande, Vivek R]

Hi all

I would like to contribute a patch which helps to control the intrinsics in interpreter, c1 and c2 by disabling the stub generation.
This uses -XX:DisableIntrinsic option to achieve the same.
Could you please review and sponsor this patch.

Bug-id:
https://bugs.openjdk.java.net/browse/JDK-8154473
webrev:
http://cr.openjdk.java.net/~vdeshpande/CompilerDirectives/8154473/webrev.00/

Thanks and regards,
Vivek

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