Heads up: JDK-8287901, affecting x86_64

[Aleksey Shipilev]

Hi,

I spent quite a bit of time on this in x86_32 port, but then I realized this actually affects x86_64 
as well:
   https://bugs.openjdk.org/browse/JDK-8287901

The Loom code is way too hairy for me to figure out what goes wrong here, I suspect that is 
something to do with the handling on compiled/deopt frames with lots of arguments. Please take a look.

-- 
Thanks,
-Aleksey