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Quick Lists
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Bug ID:
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6646020
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Votes
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0
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Synopsis
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assert(in_bb(n),"must be in block") in -Xcomp mode
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Category
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hotspot:compiler2
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Reported Against
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b09
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Release Fixed
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hs13(b01),
6u13-rev(b05) (Bug ID:2172958)
, 6u14(b01) (Bug ID:2175764)
, hs11.3(b04) (Bug ID:2176347)
, 7(b27) (Bug ID:2177084)
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State
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10-Fix Delivered,
bug
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Priority:
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3-Medium
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Related Bugs
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6782577
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6795773
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Submit Date
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29-DEC-2007
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Description
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This assertion is observed at least on linux-i586/amd64 with both latest jdk6 (1.6.0_10-ea-b09) and jdk7 (1.7.0-ea-b24):
# Internal Error (/BUILD_AREA/jdk7/hotspot/src/share/vm/opto/superword.cpp:437), pid=15100, tid=2994375600
# Error: assert(in_bb(n),"must be in block")
It occurs only in -Xcomp mode.
Testcase and hs_err file are attached.
Posted Date : 2007-12-29 01:28:37.0
Attached a testcase for solaris-i586/amd64.
The assertion occurs only with C2.
Posted Date : 2007-12-29 01:44:56.0
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Work Around
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-XX:-UseSuperWord
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Evaluation
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The logic for testing which loops can be vectorized is missing a check
for no work on the backedge. The RPO workspace tripped over this too
so I'm fixing it under this bug report.
Posted Date : 2008-04-04 19:27:51.0
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Comments
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PLEASE NOTE: JDK6 is formerly known as Project Mustang
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