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  1. JDK
  2. JDK-8135069

C2 replaces range checks by unsigned comparison with -1

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: P3
    • Resolution: Fixed
    • Affects Version/s: 9
    • Fix Version/s: 9
    • Component/s: hotspot
    • Labels:
      None
    • Subcomponent:
    • Resolved In Build:
      b84

      Backports

        Description

        The range check optimization introduced by JDK-8073480 replaces checks of the form (i < 0 && i > length - 1) with an unsigned comparison of i and (length - 1). If length is 0, i is compared to -1 and the range check does *not* fail.

        Applying the attached patch to TestBadFoldCompare.java reproduces the problem.

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                Assignee:
                roland Roland Westrelin
                Reporter:
                thartmann Tobias Hartmann
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