--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core/src/org/graalvm/compiler/core/CompilationPrinter.java	Mon Jul 17 16:31:51 2017 -0700
@@ -0,0 +1,119 @@
+/*
+ * Copyright (c) 2017, 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 org.graalvm.compiler.core;
+
+import static org.graalvm.compiler.core.GraalCompilerOptions.PrintCompilation;
+
+import org.graalvm.compiler.code.CompilationResult;
+import org.graalvm.compiler.core.common.CompilationIdentifier;
+import org.graalvm.compiler.debug.Management;
+import org.graalvm.compiler.debug.TTY;
+import org.graalvm.compiler.options.OptionValues;
+
+import jdk.vm.ci.meta.JavaMethod;
+import jdk.vm.ci.runtime.JVMCICompiler;
+
+/**
+ * Utility for printing an informational line to {@link TTY} upon completion of compiling a method.
+ */
+public final class CompilationPrinter {
+
+    private final CompilationIdentifier id;
+    private final JavaMethod method;
+    private final int entryBCI;
+    private final long start;
+    private final long allocatedBytesBefore;
+
+    /**
+     * Gets an object that will report statistics for a compilation if
+     * {@link GraalCompilerOptions#PrintCompilation} is enabled and {@link TTY} is not suppressed.
+     * This method should be called just before a compilation starts as it captures pre-compilation
+     * data for the purpose of {@linkplain #finish(CompilationResult) printing} the post-compilation
+     * statistics.
+     *
+     * @param options used to get the value of {@link GraalCompilerOptions#PrintCompilation}
+     * @param id the identifier for the compilation
+     * @param method the method for which code is being compiled
+     * @param entryBCI the BCI at which compilation starts
+     */
+    public static CompilationPrinter begin(OptionValues options, CompilationIdentifier id, JavaMethod method, int entryBCI) {
+        if (PrintCompilation.getValue(options) && !TTY.isSuppressed()) {
+            return new CompilationPrinter(id, method, entryBCI);
+        }
+        return DISABLED;
+    }
+
+    private static final CompilationPrinter DISABLED = new CompilationPrinter();
+
+    private CompilationPrinter() {
+        this.method = null;
+        this.id = null;
+        this.entryBCI = -1;
+        this.start = -1;
+        this.allocatedBytesBefore = -1;
+    }
+
+    private CompilationPrinter(CompilationIdentifier id, JavaMethod method, int entryBCI) {
+        this.method = method;
+        this.id = id;
+        this.entryBCI = entryBCI;
+
+        final long threadId = Thread.currentThread().getId();
+        start = System.nanoTime();
+        allocatedBytesBefore = getAllocatedBytes(threadId);
+    }
+
+    private String getMethodDescription() {
+        return String.format("%-30s %-70s %-45s %-50s %s", id.toString(CompilationIdentifier.Verbosity.ID),
+                        method.getDeclaringClass().getName(), method.getName(),
+                        method.getSignature().toMethodDescriptor(),
+                        entryBCI == JVMCICompiler.INVOCATION_ENTRY_BCI ? "" : "(OSR@" + entryBCI + ") ");
+    }
+
+    /**
+     * Notifies this object that the compilation finished and the informational line should be
+     * printed to {@link TTY}.
+     */
+    public void finish(CompilationResult result) {
+        if (id != null) {
+            final long threadId = Thread.currentThread().getId();
+            final long stop = System.nanoTime();
+            final long duration = (stop - start) / 1000000;
+            final int targetCodeSize = result != null ? result.getTargetCodeSize() : -1;
+            final int bytecodeSize = result != null ? result.getBytecodeSize() : 0;
+            final long allocatedBytesAfter = getAllocatedBytes(threadId);
+            final long allocatedKBytes = (allocatedBytesAfter - allocatedBytesBefore) / 1024;
+
+            TTY.println(getMethodDescription() + String.format(" | %4dms %5dB %5dB %5dkB", duration, bytecodeSize, targetCodeSize, allocatedKBytes));
+        }
+    }
+
+    static com.sun.management.ThreadMXBean threadMXBean;
+
+    static long getAllocatedBytes(long threadId) {
+        if (threadMXBean == null) {
+            threadMXBean = (com.sun.management.ThreadMXBean) Management.getThreadMXBean();
+        }
+        return threadMXBean.getThreadAllocatedBytes(threadId);
+    }
+}