RFR(s): 8222640: Remove deopt suspend

[Robbin Ehn]

Adding compiler.

/Robbin

On 4/17/19 10:35 AM, Robbin Ehn wrote:
> Hi all, please consider this change.
> 
> The code for deopt suspend is no longer needed since today the register window
> is always flushed when this code executes. Exactly when this code was needed is 
> not clear, entered via duke changeset 1. I did not dig since we no longer have 
> such use case.
> 
> Webrev:
> http://cr.openjdk.java.net/~rehn/8222640/webrev/
> Issue:
> https://bugs.openjdk.java.net/browse/JDK-8222640
> 
> Passes t1-5.
> 
> Thanks, Robbin