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          --- old/src/share/vm/runtime/arguments.cpp
          +++ new/src/share/vm/runtime/arguments.cpp
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2783 2783      SOLARIS_ONLY(FLAG_SET_DEFAULT(UseMPSS, false));
2784 2784      SOLARIS_ONLY(FLAG_SET_DEFAULT(UseISM, false));
2785 2785    }
2786 2786  
2787 2787    // Tiered compilation is undefined with C1.
2788 2788    TieredCompilation = false;
2789 2789  #else
2790 2790    if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) {
2791 2791      FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1);
2792 2792    }
2793      -  // Temporary disable bulk zeroing reduction with G1. See CR 6627983.
2794      -  if (UseG1GC) {
2795      -    FLAG_SET_DEFAULT(ReduceBulkZeroing, false);
2796      -  }
2797 2793  #endif
2798 2794  
2799 2795    // If we are running in a headless jre, force java.awt.headless property
2800 2796    // to be true unless the property has already been set.
2801 2797    // Also allow the OS environment variable JAVA_AWT_HEADLESS to set headless state.
2802 2798    if (os::is_headless_jre()) {
2803 2799      const char* headless = Arguments::get_property("java.awt.headless");
2804 2800      if (headless == NULL) {
2805 2801        char envbuffer[128];
2806 2802        if (!os::getenv("JAVA_AWT_HEADLESS", envbuffer, sizeof(envbuffer))) {
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