RFR(XS) 8011415: CTW on Sparc: assert(lrg.lo_degree()) failed:

Niclas Adlertz niclas.adlertz at oracle.com
Wed Oct 9 15:08:31 PDT 2013

Hi all,

When compiling very big methods, in this particular case a method of 60k+ nodes, a live range 'l' with mask.is_AllStack() == true can still have lo_degree() == false. This because the _mask_size of 'l' can be at most 65535, at the same time 'l' is interfering with so many other live ranges that the value of _eff_degree becomes bigger than 65535.

To solve this I've doubled that max value of _mask_size.
Appreciate feedback on this. Should we increase it by more? Or find another solution for this? Or file a future enhancement bug to solve this in a cleaner way later on?

(I've ran CTW + JPRT tests)

WEBREV: http://cr.openjdk.java.net/~adlertz/JDK-8011415/webrev00/
JBS: https://bugs.openjdk.java.net/browse/JDK-8011415

Kind Regards,
Niclas Adlertz

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