RFR (S) 8150669: C1 intrinsic for Class.isPrimitive

Aleksey Shipilev aleksey.shipilev at oracle.com
Mon Feb 29 11:54:39 UTC 2016

On 02/25/2016 11:56 PM, Aleksey Shipilev wrote:
> I would like to amend C1 with handling Class.isPrimitive intrinsic:
>   http://cr.openjdk.java.net/~shade/8150669/webrev.01/
>   https://bugs.openjdk.java.net/browse/JDK-8150669
> Through a long chain of dependencies, it would benefit String
> concatenation, possibly startup (lots of usages in java.lang.invoke, and
> who knows how many other places in JDK that use reflective meddling),
> and also, for a fun of it, fastdebug builds.
> Performance data shows we improve all interesting cases:
>   http://cr.openjdk.java.net/~shade/8150669/notes.txt
> Testing: new test; targeted benchmarks; JPRT -testset hotspot

Also, RBT tests are passing:

Please review!


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