jdk8-mips64-public/hotspot: src/share/vm/runtime/simpleThresholdPolicy.inline.hpp@eef07cd490d4

     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  */

    25 #ifndef SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_INLINE_HPP

    26 #define SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_INLINE_HPP

    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 }

    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 }

    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 }

    72 #endif // SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_INLINE_HPP

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