JDK-8211776 : 8210887 broke arraycopy optimization when ZGC is enabled
  • Type: Bug
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: 11,12
  • Priority: P3
  • Status: Resolved
  • Resolution: Fixed
  • Submitted: 2018-10-05
  • Updated: 2019-11-01
  • Resolved: 2018-10-08
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JDK 11 JDK 12
11.0.6-oracleFixed 12 b15Fixed
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Description
A short copy of an array of primitive elements should be turned into a series of loads/stores but is not anymore.
Comments
Note the backport to 11.0.6-oracle was reverted by JDK-8229906, so backport to 11.0.6 is not needed (yet).
08-10-2019

ILW = wrong arraycopy optimization; with zgc; disable zgc! = HLM = P3
08-10-2018