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Bug ID: JDK-6889656 assert(lo_lrg->lo_degree() || !lo_no_simplify,"Live range was lo-degree before coalesce; should simp
JDK-6889656 : assert(lo_lrg->lo_degree() || !lo_no_simplify,"Live range was lo-degree before coalesce; should simp

Details
Type:
Bug
Submit Date:
2009-10-08
Status:
Closed
Updated Date:
2011-03-08
Project Name:
JDK
Resolved Date:
2011-03-08
Component:
hotspot
OS:
solaris
Sub-Component:
compiler
CPU:
x86
Priority:
P2
Resolution:
Fixed
Affected Versions:
hs17
Fixed Versions:
hs17 (b04)

Related Reports
Backport:
Backport:
Relates:

Sub Tasks

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
EVALUATION

http://hg.openjdk.java.net/jdk7/hotspot-comp/hotspot/rev/5f29a958a545
                                     
2009-10-14
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.
                                     
2009-10-14



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