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  1. JDK
  2. JDK-8276116

C2: optimize long range checks in int counted loops

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    • b28

    Backports

      Description

        Similar to JDK-8259609 but for loop and range checks of the shape:

        for (int i = start; i < stop; i += inc) {
          Objects.checkIndex(scale * ((long)i) + offset, length);
        }

        and

        for (int i = start; i < stop; i += inc) {
          Objects.checkIndex(((long)(scale * i)) + offset, length);
        }

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            backported by

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8278728 C2: optimize long range checks in int counted loops

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved
            relates to

            Bug - A problem which impairs or prevents the functions of the product. JDK-8281322 C2: always construct strip mined loop initially (even if strip mining is disabled)

            • P3 - Major loss of function.
            • Resolved

            Enhancement - null JDK-8279535 C2: Dead code in PhaseIdealLoop::create_loop_nest after JDK-8276116

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved

            Enhancement - null JDK-8259609 C2: optimize long range checks in long counted loops

            • P3 - Major loss of function.
            • Resolved
            links to

            Commit Commit openjdk/jdk/b3faecf7

            Review Review openjdk/jdk/6576

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                roland Roland Westrelin
                roland Roland Westrelin
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                Dates

                  Created:
                  Updated:
                  Resolved: