RFR(s): 8222640: Remove deopt suspend

[Robbin Ehn]

Thanks Coleen!

/Robbin

On 2019-04-24 00:47, coleen.phillimore at oracle.com wrote:
> +1  This looks good!
> Coleen
> 
> On 4/23/19 5:32 PM, Robbin Ehn wrote:
>> Thanks Dean!
>>
>> /Robbin
>>
>> On 2019-04-23 23:17, dean.long at oracle.com wrote:
>>> Yes, looks good!
>>>
>>> dl
>>>
>>> On 4/23/19 12:38 PM, Robbin Ehn wrote:
>>>> Hi Dean,
>>>>
>>>> Is this what you had in mind:
>>>> diff -r 295029840379 src/hotspot/share/runtime/frame.cpp
>>>> --- a/src/hotspot/share/runtime/frame.cpp       Tue Apr 23 09:58:55 2019 +0200
>>>> +++ b/src/hotspot/share/runtime/frame.cpp       Tue Apr 23 21:32:00 2019 +0200
>>>> @@ -272,4 +272,6 @@
>>>>
>>>>  void frame::deoptimize(JavaThread* thread) {
>>>> +  assert(thread->frame_anchor()->has_last_Java_frame() &&
>>>> +         thread->frame_anchor()->walkable(), "must be");
>>>>    // Schedule deoptimization of an nmethod activation with this frame.
>>>>    assert(_cb != NULL && _cb->is_compiled(), "must be");
>>>>
>>>> Passes t1-5.
>>>>
>>>> v2:
>>>> http://cr.openjdk.java.net/~rehn/8222640/2/webrev/
>>>> Inc:
>>>> http://cr.openjdk.java.net/~rehn/8222640/2/inc/webrev/
>>>>
>>>> Thanks, Robbin
>>>>
>>>> On 2019-04-18 06:22, dean.long at oracle.com wrote:
>>>>> In frame::deoptimize(), can we assert that we have an anchor frame and that it is walkable?
>>>>>
>>>>> dl
>>>>>
>>>>> On 4/17/19 3:09 AM, Robbin Ehn wrote:
>>>>>> 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
>>>>>
>>>
>