JDK-8152179 : C2: Folding of unsigned loads is broken w/ @Stable
- Type: Bug
- Component: hotspot
- Sub-Component: compiler
- Affected Version: 9
- Priority: P2
- Status: Closed
- Resolution: Fixed
- Submitted: 2016-03-18
- Updated: 2017-08-24
- Resolved: 2016-03-28
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| JDK 9 |
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9 b114Fixed  |
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Description
At least one of the Lucene tests is failing in 9b110, and the latest hs-comp:
[junit4] Suite: org.apache.lucene.analysis.fr.TestFrenchLightStemFilter
[junit4] 2> NOTE: reproduce with: ant test -Dtestcase=TestFrenchLightStemFilter -Dtests.method=testVocabulary -Dtests.seed=4044297F9BFA5E32 -Dtests.slow=true -Dtests.locale=az-Cyrl-AZ -Dtests.timezone=ACT -Dtests.asserts=true -Dtests.file.encoding=UTF-8
[junit4] FAILURE 1.99s | TestFrenchLightStemFilter.testVocabulary <<<
[junit4] > Throwable #1: org.junit.ComparisonFailure: term 0 expected:<particuli[]> but was:<particuli[er]>
[junit4] > at __randomizedtesting.SeedInfo.seed([4044297F9BFA5E32:B159DDC343FD4788]:0)
[junit4] > at org.apache.lucene.analysis.BaseTokenStreamTestCase.assertTokenStreamContents(BaseTokenStreamTestCase.java:185)
...
[junit4] 2> NOTE: test params are: codec=Asserting(Lucene60): {}, docValues:{}, maxPointsInLeafNode=1153, maxMBSortInHeap=4.174778186834161, sim=ClassicSimilarity, locale=az-Cyrl-AZ, timezone=ACT
See the "NOTE" line for the one-liner reproducer.
Fastdebug build does not assert. The test starts to pass with -Dargs="-XX:TieredStopAtLevel=1" or -Dargs="-XX:+UnlockDiagnosticVMOptions -XX:-FoldStableValues", which points to @Stable bug in C2. Dropping @Stable from String.value also makes test pass. This seems to be another thing triggered by @Stable String.value (JDK-8150180) -- we fixed a lot of them, but this one seemed to escape.
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