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  1. JDK
  2. JDK-8238691

C2: turn subtype check into macro node

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Details

    • Enhancement
    • Resolution: Fixed
    • P4
    • 15
    • 15
    • hotspot
    • b11

    Description

      This should allow subtype checks that can't be compiled as a simple pointer comparison at parse time to:

      - better constant fold
      - be candidate for predication and split if
      - have a chance of being compiled as a simple pointer comparison if type information improves

      Attachments

        Issue Links

          duplicates

          Enhancement - null JDK-8222075 C2: Enable loop predication for subtype checks

          • P3 - Major loss of function.
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. JDK-8239072 subtype check macro node causes node budget to be exhausted

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

          Bug - A problem which impairs or prevents the functions of the product. JDK-8299155 C2: SubTypeCheckNode::verify() should not produce dependencies / oop pool entries

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

          Bug - A problem which impairs or prevents the functions of the product. JDK-8239335 C2: assert((Value(phase) == t) || (t != TypeInt::CC_GT && t != TypeInt::CC_EQ)) failed: missing Value() optimization

          • P2 - Crashes, loss of data, severe memory leak.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. JDK-8239367 RunThese30M.java failed due to "assert(false) failed: graph should be schedulable"

          • P2 - Crashes, loss of data, severe memory leak.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. JDK-8239565 sa/ClhsdbJhisto.java failed due to "assert(false) failed: unscheduable graph"

          • P2 - Crashes, loss of data, severe memory leak.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. JDK-8253566 clazz.isAssignableFrom will return false for interface implementors

          • P2 - Crashes, loss of data, severe memory leak.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. JDK-8316533 C2 compilation fails with assert(verify(phase)) failed: missing Value() optimization

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

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              roland Roland Westrelin
              roland Roland Westrelin
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              Dates

                Created:
                Updated:
                Resolved: