RFR (S) 8141044: C1 should fold (this == null) to false

Aleksey Shipilev aleksey.shipilev at oracle.com
Tue Nov 3 22:46:57 UTC 2015

On 11/04/2015 01:40 AM, John Rose wrote:
> On Nov 3, 2015, at 1:42 PM, Aleksey Shipilev
> <aleksey.shipilev at oracle.com <mailto:aleksey.shipilev at oracle.com>> wrote:
>> Actually, scratch that, I've played with different examples, including
>> the A*FU case, and the example Kris shows above, and we elide the
>> null-check in all interesting cases. Therefore, I'd like the current
>> patch to go in its current form. For the record:
>>  http://cr.openjdk.java.net/~shade/8141044/webrev.01/
>> <http://cr.openjdk.java.net/%7Eshade/8141044/webrev.01/>
> Reviewed.  Nice work.
> I'm glad you are not changing the type system.  That's a high-leverage,
> high-risk move.

Thanks John!

Having no other comments in 24 hours, and once/if RBT results come
clean, I'll push.


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