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  1. JDK
  2. JDK-8058825

EA: ConnectionGraph::split_unique_types does incorrect scalar replacement

    Details

    • Type: Bug
    • Status: Resolved
    • Priority: P2
    • Resolution: Fixed
    • Affects Version/s: 8u40, 9
    • Fix Version/s: 9
    • Component/s: hotspot
    • Environment:

      C2, -XX:CompileCommand=compileonly,java/lang/invoke/MethodHandleImpl.varargsArray

    • Subcomponent:
    • Introduced In Build:
      b06
    • Introduced In Version:
    • Resolved In Build:
      b35

      Backports

        Description

        MH returned for a typed array by compiled MethodHandleImpl::varargsArray throws java.lang.ClassCastException: Cannot cast [Ljava.lang.Object; to [L<your fancy type>.

        Issue could be reproduced by following tests starting from 8u40-b06:
        java/lang/invoke/JavaDocExamplesTest.java
        java/lang/invoke/VarargsArrayTest.java

        With 8u40-b05 JavaDocExamplesTest pass, so it seems to be a regression.
        This test also passes with 8u20-fcs and with 9-b31.

        When MethodHandleImpl::varargsArray compilation disabled via -XX:CompileCommand=exclude,java/lang/invoke/MethodHandleImpl.varargsArray both tests pass.

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                • Assignee:
                  vlivanov Vladimir Ivanov
                  Reporter:
                  fzhinkin Filipp Zhinkin
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                  • Created:
                    Updated:
                    Resolved: