1 /*
   2  * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_INLINE_HPP
  26 #define SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_INLINE_HPP
  27 
  28 template<CompLevel level>
  29 bool SimpleThresholdPolicy::call_predicate_helper(int i, int b, double scale) {
  30   switch(level) {
  31   case CompLevel_none:
  32   case CompLevel_limited_profile:
  33     return (i > Tier3InvocationThreshold * scale) ||
  34            (i > Tier3MinInvocationThreshold * scale && i + b > Tier3CompileThreshold * scale);
  35   case CompLevel_full_profile:
  36    return (i > Tier4InvocationThreshold * scale) ||
  37           (i > Tier4MinInvocationThreshold * scale && i + b > Tier4CompileThreshold * scale);
  38   }
  39   return true;
  40 }
  41 
  42 template<CompLevel level>
  43 bool SimpleThresholdPolicy::loop_predicate_helper(int i, int b, double scale) {
  44   switch(level) {
  45   case CompLevel_none:
  46   case CompLevel_limited_profile:
  47     return b > Tier3BackEdgeThreshold * scale;
  48   case CompLevel_full_profile:
  49     return b > Tier4BackEdgeThreshold * scale;
  50   }
  51   return true;
  52 }
  53 
  54 // Simple methods are as good being compiled with C1 as C2.
  55 // Determine if a given method is such a case.
  56 bool SimpleThresholdPolicy::is_trivial(Method* method) {
  57   if (method->is_accessor() ||
  58       method->is_constant_getter()) {
  59     return true;
  60   }
  61   if (method->has_loops() || method->code_size() >= 15) {
  62     return false;
  63   }
  64   MethodData* mdo = method->method_data();
  65   if (mdo != NULL && !mdo->would_profile() &&
  66       (method->code_size() < 5  || (mdo->num_blocks() < 4))) {
  67     return true;
  68   }
  69   return false;
  70 }
  71 
  72 #endif // SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_INLINE_HPP