RFR(m): 8221734: Deoptimize with handshakes

[dean.long at oracle.com]

On 5/3/19 3:31 AM, Robbin Ehn wrote:
> Dean can you please cast an extra eye on:
> http://cr.openjdk.java.net/~rehn/8221734/v2/inc/webrev/src/hotspot/share/oops/method.cpp.sdiff.html 
>
> This OR should be correct. 

Looks good.

I also noticed that nmethod::make_unloaded calling unlink_code is still 
doing an extra

|| method->from_compiled_entry() == compare->verified_entry_point()


that wasn't there before.  However, this seems like an improvement that 
could be fixing a latent bug.

dl
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