JDK-6889656 : assert(lo_lrg->lo_degree() || !lo_no_simplify,"Live range was lo-degree before coalesce; should simp
  • Type: Bug
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: hs17
  • Priority: P2
  • Status: Closed
  • Resolution: Fixed
  • OS: solaris
  • CPU: x86
  • Submitted: 2009-10-08
  • Updated: 2011-03-08
  • Resolved: 2011-03-08
The Version table provides details related to the release that this issue/RFE will be addressed.

Unresolved : Release in which this issue/RFE will be addressed.
Resolved: Release in which this issue/RFE has been resolved.
Fixed : Release in which this issue/RFE has been fixed. The release containing this fix may be available for download as an Early Access Release or a General Availability Release.

To download the current JDK release, click here.
JDK 6 JDK 7 Other
6u21Fixed 7Fixed hs17Fixed
Related Reports
Relates :  
JDK-6875959 - CTW fails hotspot/src/share/vm/opto/reg_split.cpp:1087
Description
Regression after my fix for 6875959.

java -cp /net/sqenfs-1.sfbay/export1/comp/vm/testbase/sqe/vm/6/build/latest/vm/bin/classes -Xcomp -XX:CICompilerCount=1 -XX:+PrintCompilation Limit
VM option 'CICompilerCount=1'
VM option '+PrintCompilation'
...
952   b   sun.util.calendar.JulianCalendar::getCalendarDateFromFixedDate (247 bytes)
953   b   sun.util.calendar.JulianCalendar::getFixedDate (225 bytes)
# To suppress the following error report, specify this argument
# after -XX: or in .hotspotrc:  SuppressErrorAt=/chaitin.cpp:1034
#
# A fatal error has been detected by the Java Runtime Environment:
#
#  Internal Error (/tmp/jprt/P2/B/194848.kvn/source/src/share/vm/opto/chaitin.cpp:1034), pid=27527, tid=14
#  Error: assert(lo_lrg->lo_degree() || !lo_no_simplify,"Live range was lo-degree before coalesce; should simplify")
#
# JRE version: 6.0
# Java VM: OpenJDK 64-Bit Server VM (17.0-b01-2009-10-07-194848.kvn.6875959-fastdebug compiled mode solaris-amd64 compressed oops)
# An error report file with more information is saved as:
# /export/home/kvn/build/6889300/hs_err_pid27527.log
#
Comments
PUBLIC COMMENTS Problem: Because of initial loop's "i" value change in 6875959 fix the first _hi_degree lrg was not checked for lo_degree(). Solution: Restore the original code: uint i = _hi_degree.
14-10-2009
EVALUATION http://hg.openjdk.java.net/jdk7/hotspot-comp/hotspot/rev/5f29a958a545
14-10-2009