RFR (XXL): JEP 243: Java-Level JVM Compiler Interface

Volker Simonis volker.simonis at gmail.com
Tue Sep 15 14:07:15 UTC 2015

Hi Christian,

can you please merge the following changes into your code:


They fix the build on our ppc64 platforms (Linux and AIX). Of course
there's still a lot to do in order to implement the full interface for
PowerPC (currently only the two options tests pass and all the runtime
tests fail as expected), but this is a first step :)

My webrev contains only one shared change in jvmciRuntime.cpp which is
necessary to fix a warning because unreachable code introduced by the
CHECK_NULL macro in a return statement.

Finally, I also want to ask if it is expected that the current C1/C2
JIT compilers and/or the standard JDK class will eventually depend on
the JVMCI library or will the JVMCI remain an optional component like
for example the SA agent.

Thank you and best regards,

PS: are there any JVMCI documents/presentation available other than
the JEP description?

On Mon, Sep 14, 2015 at 9:24 AM, Christian Thalinger
<christian.thalinger at oracle.com> wrote:
> The JEP itself can be found here:
> https://bugs.openjdk.java.net/browse/JDK-8062493 <https://bugs.openjdk.java.net/browse/JDK-8062493>
> Here are the webrevs:
> http://cr.openjdk.java.net/~kvn/JVMCI/webrev.top/ <http://cr.openjdk.java.net/~kvn/JVMCI/webrev.top/>
> http://cr.openjdk.java.net/~kvn/JVMCI/webrev.hotspot/ <http://cr.openjdk.java.net/~kvn/JVMCI/webrev.hotspot/>
> The change has already undergone a few iterations of internal review by different people of different teams.  Most comments and suggestions were handled accordingly.  Although there is one open item we agreed we will address after the integration of JEP 243 and that work is captured in RFE:
> https://bugs.openjdk.java.net/browse/JDK-8134994 <https://bugs.openjdk.java.net/browse/JDK-8134994>
> SQE is still working on the tests and all test tasks can be seen as sub-tasks of the JEP.
> The integration will happen under the bug number:
> https://bugs.openjdk.java.net/browse/JDK-8136421 <https://bugs.openjdk.java.net/browse/JDK-8136421>

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