JDK-8074548 : Never-taken branches cause repeated deopts in MHs.GWT case
- Type: Bug
- Component: hotspot
- Sub-Component: compiler
- Affected Version: 8u60,9
- Priority: P3
- Status: Resolved
- Resolution: Fixed
- Submitted: 2015-03-06
- Updated: 2015-09-29
- Resolved: 2015-03-20
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| JDK 8 | JDK 9 |
|---|---|
8u60Fixed  |
9 b64Fixed |
Description
MethodHandleImpl::profileBoolean doesn't update never-taken branch count when hitting a deopt on it. As a result, for rarely taken branches consequent compilations consider them as never-taken and prune them again, causing repeated deopts. It severely affects peak performance.
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