[8u] Request for approval: Backport of 8147548: need comprehensive fix for unconstrained ConvI2L with narrowed type

Tobias Hartmann tobias.hartmann at oracle.com
Mon Jan 25 09:59:37 UTC 2016


Hi,

please approve and review the following backport to 8u.

8147548: need comprehensive fix for unconstrained ConvI2L with narrowed type
https://bugs.openjdk.java.net/browse/JDK-8147548
http://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/2016-January/020810.html
http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/bfb7a8a004de

The fix was pushed to hs-comp on January, 18 and nightly testing showed no problems. Unfortunately, the changes do not apply cleanly to 8u-dev because several enhancements that affect related code were not backported to 8. Here is a new webrev:
http://cr.openjdk.java.net/~thartmann/6675699_8u/webrev.00/

I did additional performance and correctness testing to verify that the backport works fine and does not introduce a regression.

Thanks,
Tobias


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