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  1. JDK
  2. JDK-4814905

PhiNodes idealized prematurely.

    Details

    • Type: Bug
    • Status: Closed
    • Priority: P4
    • Resolution: Won't Fix
    • Affects Version/s: 6
    • Fix Version/s: 6
    • Component/s: hotspot
    • Labels:
      None
    • Subcomponent:
    • CPU:
      generic
    • OS:
      generic

      Description

      Bugs 4781451 and 4799512 would be better fixed if compiler2 allowed TOP nodes to remain as inputs to PhiNodes.

      Currently, PhiNodes are idealized to a single input when all other inputs are Type::TOP. If the inputs to the corresponding RegionNode are not also eliminated, then C2 may have a node which does not dominate its uses.

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              • Assignee:
                rasbold Chuck Rasbold
                Reporter:
                rasbold Chuck Rasbold
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