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  1. JDK
  2. JDK-8035605

Expand functionality of PredictedIntrinsicGenerator

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    • Enhancement
    • Resolution: Fixed
    • P3
    • 9
    • 9
    • hotspot
    • b20
    • generic
    • generic

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      Description

        Some intrinsic may need to check several classes in predicate for which intrinsic should be generated.
        The mechanism of intrinsic_foo_predicate() and intrinsic_foo() was designed only to check one class so that you don't need class check in intrinsic_foo().
        But for several classes you have to check instanceOf for all of them in both intrinsic_foo_predicate() and intrinsic_foo().
        We need to expand this functionality to do something like next in PredictedIntrinsicGenerator::generate():

          int klass_cnt = intrinsic_foo_klass_count();
          Node* result_region = new Region(klass_cnt+1);
          for (int i = 0; i < klass_cnt; i++) {
            false_control = intrinsic_foo_predicate(i);
            intrinsic_foo(i);
            result_region->set_req(i, control());
            set_control(false_control);
          }
          generate_normal_compile()
          result_region->set_req(klass_cnt, control());
          set_control(result_region);

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                Unassigned Unassigned
                kvn Vladimir Kozlov
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