jdk8-mips64-public/hotspot: src/share/vm/runtime/simpleThresholdPolicy.inline.hpp@0715f0cf171d

     1 /*

     2  * Copyright (c) 2001, 2010, 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

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    23  */

    26 template<CompLevel level>

    27 bool SimpleThresholdPolicy::call_predicate_helper(int i, int b, double scale) {

    28   switch(level) {

    29   case CompLevel_none:

    30   case CompLevel_limited_profile:

    31     return (i > Tier3InvocationThreshold * scale) ||

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

    33   case CompLevel_full_profile:

    34    return (i > Tier4InvocationThreshold * scale) ||

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

    36   }

    37   return true;

    38 }

    40 template<CompLevel level>

    41 bool SimpleThresholdPolicy::loop_predicate_helper(int i, int b, double scale) {

    42   switch(level) {

    43   case CompLevel_none:

    44   case CompLevel_limited_profile:

    45     return b > Tier3BackEdgeThreshold * scale;

    46   case CompLevel_full_profile:

    47     return b > Tier4BackEdgeThreshold * scale;

    48   }

    49   return true;

    50 }

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

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

    54 bool SimpleThresholdPolicy::is_trivial(methodOop method) {

    55   if (method->is_accessor()) return true;

    56   if (method->code() != NULL) {

    57     methodDataOop mdo = method->method_data();

    58     if (mdo != NULL && mdo->num_loops() == 0 &&

    59         (method->code_size() < 5  || (mdo->num_blocks() < 4) && (method->code_size() < 15))) {

    60       return !mdo->would_profile();

    61     }

    62   }

    63   return false;

    64 }

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