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  1. JDK
  2. JDK-8267956

C1 code cleanup

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    Details

    • Type: Enhancement
    • Status: Resolved
    • Priority: P4
    • Resolution: Fixed
    • Affects Version/s: 17
    • Fix Version/s: 18
    • Component/s: hotspot
    • Labels:
    • Subcomponent:
    • Resolved In Build:
      b05

      Description

      While skimming C1 code, I found a lot of useless/invalid/unimplemented code, they can be harmless removed.

      - Unused IntInterval in type hierarchy
      - Unused MethodDataConstant in type hierarchy
      - Unused MethodDataType in type hierarchy
      - Unused LIRGenerator::maybe_mask_boolean after JDK-XXX...
      - Unused is_*_stub() **virtual methods** in CodeStub
      - Unused start_block and bind_block_entry declarations in c1_LIRGenerator.hpp
      - Residual do_ClassIDIntrinsic declarations in c1_LIRGenerator.hpp
      - Meet/join are never implemented
      - LIRTracePeephole does nothing, also its name is confusing
      - Directly define inline functions in c1_ValueSet.hpp and remove c1_ValueSet.inline.hpp and c1_ValueSet.cpp files
      - Duplicated Compilation::count_invocations() and Compilation::count_backedges()
      - Remove c1_Defs.cpp
      - Remove lir_backwardbranch_target

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              Assignee:
              yyang Yi Yang
              Reporter:
              yyang Yi Yang
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                Updated:
                Resolved: