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  1. JDK
  2. JDK-8364407 [REDO] Consolidate Identity of self-inverse operations
  3. JDK-8364409

[BACKOUT] Consolidate Identity of self-inverse operations

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    • b10

        This issue was reported by [~hgreule].

        When self-inverting java/lang/Character.reverseBytes InvolutionNode::Identity can drop necessary masking of subword types. When calling Character.reverseBytes with a wider integer type than char, this leads to a wrong execution when the char result of the self-inverse is used as an int, e.g. in an array access, where a large enough value will cause an unexpected ArrayOutOfBoundsException (see reproducer).

          1. Test.java
            1 kB
          2. TestReverseBytesCharHelper.jasm
            1 kB

              mhaessig Manuel Hässig
              mhaessig Manuel Hässig
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