JDK-8264063 : Outer Safepoint poll load should not reference the head of inner strip mined loop.
- Type: Enhancement
- Component: hotspot
- Sub-Component: compiler
- Affected Version: 17
- Priority: P4
- Status: Resolved
- Resolution: Fixed
- Submitted: 2021-03-23
- Updated: 2024-02-06
- Resolved: 2021-04-08
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| JDK 17 |
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17 b18Fixed  |
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Description
Enhancement JDK-8247307 "C2: Loop array fill stub routines are not called" introduced new code which checks for special condition in strip-mined counted loops when inner CountedLoopNode may be used by the address polling node of the outer safepoint. After that we hit JDK-8263352 issue in this new code. But the actual issue is that we don't need JDK-8247307 optimization because outer Safepoint poll load should not reference inner CountedLoopNode. Roland suggested next change to fix it. See his comment in https://github.com/openjdk/jdk/pull/3061
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