--- /dev/null 2017-01-22 10:16:57.869617664 -0800 +++ new/src/jdk.internal.vm.ci/share/classes/jdk.vm.ci.meta/src/jdk/vm/ci/meta/DefaultProfilingInfo.java 2017-02-15 16:56:05.875043384 -0800 @@ -0,0 +1,110 @@ +/* + * Copyright (c) 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 + * questions. + */ +package jdk.vm.ci.meta; + +/** + * An implementation of {@link ProfilingInfo} that can used in the absence of real profile + * information. + */ +public final class DefaultProfilingInfo implements ProfilingInfo { + + private static final ProfilingInfo[] NO_PROFILING_INFO = new ProfilingInfo[]{new DefaultProfilingInfo(TriState.TRUE), new DefaultProfilingInfo(TriState.FALSE), + new DefaultProfilingInfo(TriState.UNKNOWN)}; + + private final TriState exceptionSeen; + + DefaultProfilingInfo(TriState exceptionSeen) { + this.exceptionSeen = exceptionSeen; + } + + @Override + public int getCodeSize() { + return 0; + } + + @Override + public JavaTypeProfile getTypeProfile(int bci) { + return null; + } + + @Override + public JavaMethodProfile getMethodProfile(int bci) { + return null; + } + + @Override + public double getBranchTakenProbability(int bci) { + return -1; + } + + @Override + public double[] getSwitchProbabilities(int bci) { + return null; + } + + @Override + public TriState getExceptionSeen(int bci) { + return exceptionSeen; + } + + @Override + public TriState getNullSeen(int bci) { + return TriState.UNKNOWN; + } + + @Override + public int getExecutionCount(int bci) { + return -1; + } + + public static ProfilingInfo get(TriState exceptionSeen) { + return NO_PROFILING_INFO[exceptionSeen.ordinal()]; + } + + @Override + public int getDeoptimizationCount(DeoptimizationReason reason) { + return 0; + } + + @Override + public boolean isMature() { + return false; + } + + @Override + public String toString() { + return "DefaultProfilingInfo<" + this.toString(null, "; ") + ">"; + } + + public void setMature() { + // Do nothing + } + + public boolean setCompilerIRSize(Class irType, int nodeCount) { + return false; + } + + public int getCompilerIRSize(Class irType) { + return -1; + } +}