Enhancing C2 support of Vector API implementation

[Viswanathan, Sandhya]

Hi Vladimir,

Thanks for sharing your thoughts; very valuable information. I have a question on the "Generalized Intrinsics". On slide 20, you have a comment:
"If inlining happens, then the intrinsification will always succeed
	• Vector::add()/IntVector::add()	=> Int256Vector::add() => VectorIntrinsics::binaryOp(..)"

Would @ForceInline annotation on VectorIntrinsic binaryOp(..) method help here to make sure that it gets in-lined always by C2? 

Best Regards,
Sandhya


-----Original Message-----
From: panama-dev [mailto:panama-dev-bounces at openjdk.java.net] On Behalf Of Vladimir Ivanov
Sent: Tuesday, December 19, 2017 9:10 AM
To: 'panama-dev at openjdk.java.net' <panama-dev at openjdk.java.net>
Subject: Enhancing C2 support of Vector API implementation

Hi,

I'd like to share an overview of possible improvements in C2 support of 
Vector API:
 
http://cr.openjdk.java.net/~vlivanov/talks/2017_VectorAPI_C2_Enhancements.pdf

The focus is on generalized intrinsics and vector box eliminiation, but 
(I hope) in a more accessible form than I wrote on the list before [1] [2].

Though the focus is on near-term opportunities, possible interactions 
with Project Valhalla are covered a bit.

Best regards,
Vladimir Ivanov

[1] 
http://mail.openjdk.java.net/pipermail/panama-dev/2017-November/000748.html
[2] 
http://mail.openjdk.java.net/pipermail/panama-dev/2017-December/000840.html