--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core.test/src/org/graalvm/compiler/core/test/UnsafeReadEliminationTest.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,215 @@
+/*
+ * Copyright (c) 2016, 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.test;
+
+import org.graalvm.compiler.api.directives.GraalDirectives;
+import org.graalvm.compiler.nodes.StructuredGraph;
+import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions;
+import org.graalvm.compiler.nodes.extended.UnsafeAccessNode;
+import org.graalvm.compiler.nodes.memory.ReadNode;
+import org.graalvm.compiler.nodes.memory.WriteNode;
+import org.graalvm.compiler.nodes.spi.LoweringTool;
+import org.graalvm.compiler.options.OptionValues;
+import org.graalvm.compiler.phases.common.CanonicalizerPhase;
+import org.graalvm.compiler.phases.common.LoweringPhase;
+import org.graalvm.compiler.phases.tiers.PhaseContext;
+import org.graalvm.compiler.virtual.phases.ea.EarlyReadEliminationPhase;
+import org.graalvm.compiler.virtual.phases.ea.PartialEscapePhase;
+import org.junit.Assert;
+import org.junit.Test;
+
+import sun.misc.Unsafe;
+
+public class UnsafeReadEliminationTest extends GraalCompilerTest {
+
+ public static long[] Memory = new long[]{1, 2};
+ public static double SideEffectD;
+ public static double SideEffectL;
+
+ private static final long byteArrayBaseOffset;
+ private static final long intArrayBaseOffset;
+ private static final long longArrayBaseOffset;
+
+ static {
+ byteArrayBaseOffset = UNSAFE.arrayBaseOffset(byte[].class);
+ intArrayBaseOffset = UNSAFE.arrayBaseOffset(int[].class);
+ longArrayBaseOffset = UNSAFE.arrayBaseOffset(long[].class);
+ }
+
+ public static long test1Snippet(double a) {
+ final Object m = Memory;
+ if (a > 0) {
+ UNSAFE.putDouble(m, (long) Unsafe.ARRAY_LONG_BASE_OFFSET, a);
+ } else {
+ SideEffectL = UNSAFE.getLong(m, (long) Unsafe.ARRAY_LONG_BASE_OFFSET);
+ }
+ return UNSAFE.getLong(m, (long) Unsafe.ARRAY_LONG_BASE_OFFSET);
+ }
+
+ public static class A {
+ long[][] o;
+ long[][] p;
+ }
+
+ public static Object test2Snippet(A a, int c) {
+ Object phi = null;
+ if (c != 0) {
+ long[][] r = a.o;
+ phi = r;
+ UNSAFE.putDouble(r, (long) Unsafe.ARRAY_LONG_BASE_OFFSET, 12d);
+ } else {
+ long[][] r = a.p;
+ phi = r;
+ UNSAFE.putLong(r, (long) Unsafe.ARRAY_LONG_BASE_OFFSET, 123);
+ }
+ GraalDirectives.controlFlowAnchor();
+ SideEffectD = UNSAFE.getDouble(phi, (long) Unsafe.ARRAY_LONG_BASE_OFFSET);
+ return phi;
+ }
+
+ @Test
+ public void test01() {
+ StructuredGraph graph = parseEager("test1Snippet", AllowAssumptions.NO);
+ testEarlyReadElimination(graph, 3, 2);
+ }
+
+ @Test
+ public void test02() {
+ StructuredGraph graph = parseEager("test1Snippet", AllowAssumptions.NO);
+ testPartialEscapeReadElimination(graph, 3, 2);
+ }
+
+ @Test
+ public void test03() {
+ StructuredGraph graph = parseEager("test2Snippet", AllowAssumptions.NO);
+ testEarlyReadElimination(graph, 3, 3);
+ }
+
+ @Test
+ public void test04() {
+ StructuredGraph graph = parseEager("test2Snippet", AllowAssumptions.NO);
+ testEarlyReadElimination(graph, 3, 3);
+ }
+
+ public void testEarlyReadElimination(StructuredGraph graph, int reads, int writes) {
+ PhaseContext context = getDefaultHighTierContext();
+ CanonicalizerPhase canonicalizer = new CanonicalizerPhase();
+ canonicalizer.apply(graph, context);
+ new EarlyReadEliminationPhase(canonicalizer).apply(graph, context);
+ Assert.assertEquals(3, graph.getNodes().filter(UnsafeAccessNode.class).count());
+ // after lowering the same applies for reads and writes
+ new LoweringPhase(canonicalizer, LoweringTool.StandardLoweringStage.HIGH_TIER).apply(graph, context);
+ canonicalizer.apply(graph, context);
+ new EarlyReadEliminationPhase(canonicalizer).apply(graph, context);
+ Assert.assertEquals(reads, graph.getNodes().filter(ReadNode.class).count());
+ Assert.assertEquals(writes, graph.getNodes().filter(WriteNode.class).count());
+ }
+
+ public void testPartialEscapeReadElimination(StructuredGraph graph, int reads, int writes) {
+ OptionValues options = graph.getOptions();
+ PhaseContext context = getDefaultHighTierContext();
+ CanonicalizerPhase canonicalizer = new CanonicalizerPhase();
+ canonicalizer.apply(graph, context);
+ new PartialEscapePhase(true, true, canonicalizer, null, options).apply(graph, context);
+ Assert.assertEquals(3, graph.getNodes().filter(UnsafeAccessNode.class).count());
+ // after lowering the same applies for reads and writes
+ new LoweringPhase(canonicalizer, LoweringTool.StandardLoweringStage.HIGH_TIER).apply(graph, context);
+ canonicalizer.apply(graph, context);
+ new PartialEscapePhase(true, true, canonicalizer, null, options).apply(graph, context);
+ Assert.assertEquals(reads, graph.getNodes().filter(ReadNode.class).count());
+ Assert.assertEquals(writes, graph.getNodes().filter(WriteNode.class).count());
+ }
+
+ public static int testWriteIntToByteArraySnippet() {
+ byte[] array = new byte[4];
+ UNSAFE.putInt(array, byteArrayBaseOffset, 0x01020304);
+ return array[0];
+ }
+
+ @Test
+ public void testWriteIntToByteArray() {
+ test("testWriteIntToByteArraySnippet");
+ }
+
+ public static byte testWriteSignedExtendedByteToByteArraySnippet(byte b) {
+ byte[] array = new byte[4];
+ array[0] = 0x01;
+ array[1] = 0x02;
+ array[2] = 0x03;
+ array[3] = 0x04;
+ UNSAFE.putInt(array, byteArrayBaseOffset, b);
+ return array[3];
+ }
+
+ @Test
+ public void testWriteSignedExtendedByteToByteArray() {
+ test("testWriteSignedExtendedByteToByteArraySnippet", (byte) 0);
+ }
+
+ public static int testWriteLongToIntArraySnippet() {
+ int[] array = new int[2];
+ UNSAFE.putLong(array, intArrayBaseOffset, 0x0102030405060708L);
+ return array[0];
+ }
+
+ @Test
+ public void testWriteLongToIntArray() {
+ test("testWriteLongToIntArraySnippet");
+ }
+
+ public static int testWriteByteToIntArraySnippet() {
+ int[] array = new int[1];
+ array[0] = 0x01020304;
+ UNSAFE.putByte(array, intArrayBaseOffset, (byte) 0x05);
+ return array[0];
+ }
+
+ @Test
+ public void testWriteByteToIntArray() {
+ test("testWriteByteToIntArraySnippet");
+ }
+
+ public static long testWriteIntToLongArraySnippet() {
+ long[] array = new long[1];
+ array[0] = 0x0102030405060708L;
+ UNSAFE.putInt(array, longArrayBaseOffset, 0x04030201);
+ return array[0];
+ }
+
+ @Test
+ public void testWriteIntToLongArray() {
+ test("testWriteIntToLongArraySnippet");
+ }
+
+ public static float testWriteFloatToIntArraySnippet() {
+ float[] array = new float[1];
+ UNSAFE.putInt(array, intArrayBaseOffset, Float.floatToRawIntBits(0.5f));
+ return array[0];
+ }
+
+ @Test
+ public void testWriteFloatToIntArray() {
+ test("testWriteFloatToIntArraySnippet");
+ }
+
+}