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/*
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* Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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template<CompLevel level>
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bool SimpleThresholdPolicy::call_predicate_helper(int i, int b, double scale) {
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switch(level) {
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case CompLevel_none:
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case CompLevel_limited_profile:
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return (i > Tier3InvocationThreshold * scale) ||
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(i > Tier3MinInvocationThreshold * scale && i + b > Tier3CompileThreshold * scale);
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case CompLevel_full_profile:
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return (i > Tier4InvocationThreshold * scale) ||
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(i > Tier4MinInvocationThreshold * scale && i + b > Tier4CompileThreshold * scale);
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}
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return true;
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}
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template<CompLevel level>
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bool SimpleThresholdPolicy::loop_predicate_helper(int i, int b, double scale) {
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switch(level) {
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case CompLevel_none:
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case CompLevel_limited_profile:
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return b > Tier3BackEdgeThreshold * scale;
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case CompLevel_full_profile:
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return b > Tier4BackEdgeThreshold * scale;
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}
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return true;
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}
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// Simple methods are as good being compiled with C1 as C2.
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// Determine if a given method is such a case.
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bool SimpleThresholdPolicy::is_trivial(methodOop method) {
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if (method->is_accessor()) return true;
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if (method->code() != NULL) {
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methodDataOop mdo = method->method_data();
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if (mdo != NULL && mdo->num_loops() == 0 &&
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(method->code_size() < 5 || (mdo->num_blocks() < 4) && (method->code_size() < 15))) {
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return !mdo->would_profile();
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}
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}
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return false;
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}
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