/*

 * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

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 */

#ifndef SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_INLINE_HPP

#define SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_INLINE_HPP

#include "compiler/compilerOracle.hpp"

template<CompLevel level>

bool SimpleThresholdPolicy::call_predicate_helper(int i, int b, double scale, Method* method) {

  double threshold_scaling;

  if (CompilerOracle::has_option_value(method, "CompileThresholdScaling", threshold_scaling)) {

    scale *= threshold_scaling;

  }

  switch(level) {

  case CompLevel_none:

  case CompLevel_limited_profile:

    return (i >= Tier3InvocationThreshold * scale) ||

           (i >= Tier3MinInvocationThreshold * scale && i + b >= Tier3CompileThreshold * scale);

  case CompLevel_full_profile:

   return (i >= Tier4InvocationThreshold * scale) ||

          (i >= Tier4MinInvocationThreshold * scale && i + b >= Tier4CompileThreshold * scale);

  }

  return true;

}

template<CompLevel level>

bool SimpleThresholdPolicy::loop_predicate_helper(int i, int b, double scale, Method* method) {

  double threshold_scaling;

  if (CompilerOracle::has_option_value(method, "CompileThresholdScaling", threshold_scaling)) {

    scale *= threshold_scaling;

  }

  switch(level) {

  case CompLevel_none:

  case CompLevel_limited_profile:

    return b >= Tier3BackEdgeThreshold * scale;

  case CompLevel_full_profile:

    return b >= Tier4BackEdgeThreshold * scale;

  }

  return true;

}

// Simple methods are as good being compiled with C1 as C2.

// Determine if a given method is such a case.

bool SimpleThresholdPolicy::is_trivial(Method* method) {

  if (method->is_accessor() ||

      method->is_constant_getter()) {

    return true;

  }

  if (method->has_loops() || method->code_size() >= 15) {

    return false;

  }

  MethodData* mdo = method->method_data();

  if (mdo != NULL && !mdo->would_profile() &&

      (method->code_size() < 5  || (mdo->num_blocks() < 4))) {

    return true;

  }

  return false;

}

#endif // SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_INLINE_HPP