add conditional elimination 17 test: contributed by Andreas Woess

compiler/src/jdk.graal.compiler.test/src/jdk/graal/compiler/core/test/ConditionalEliminationTest17.java

@@ -0,0 +1,172 @@
+/*
+ * Copyright (c) 2024, 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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.graal.compiler.core.test;
+
+import java.util.EnumSet;
+
+import org.junit.Test;
+
+import jdk.graal.compiler.api.directives.GraalDirectives;
+import jdk.vm.ci.meta.DeoptimizationReason;
+
+/**
+ * GR-52269
+ */
+public class ConditionalEliminationTest17 extends ConditionalEliminationTestBase {
+
+    static final class A {
+    }
+
+    static final class B {
+        int value = 1337;
+
+        int value() {
+            return value;
+        }
+    }
+
+    private static boolean equals(byte[] a, byte[] b) {
+        if (a == b) {
+            return true;
+        } else if (a.length != b.length) {
+            return false;
+        } else {
+            for (int i = 0; i < a.length; i++) {
+                if (a[i] != b[i]) {
+                    return false;
+                }
+            }
+            return true;
+        }
+    }
+
+    private static final Object X = new Object();
+    private static final Object Y = new Object();
+
+    public static int test1Snippet(byte[][] haystack, byte[] needle, Object[] otherValues) {
+        Object someValue = otherValues[0];
+        Object anotherValue1 = otherValues[1];
+        Object anotherValue2 = otherValues[2];
+        if (haystack.length != 0) {
+            for (int i = 0; i < haystack.length; i++) {
+                byte[] hay = haystack[i];
+                if (equals(hay, needle)) {
+                    int result = 42;
+                    if (anotherValue1 == X) {
+                        if (anotherValue2 == Y) {
+                            result++;
+                            GraalDirectives.controlFlowAnchor();
+                        }
+                        GraalDirectives.controlFlowAnchor();
+                    }
+                    if (someValue.getClass() != A.class) {
+                        GraalDirectives.deoptimizeAndInvalidate();
+                    }
+                    GraalDirectives.controlFlowAnchor();
+                    return result;
+                }
+            }
+        }
+        return ((B) someValue).value();
+    }
+
+    @Test
+    public void test1() {
+        Object[] args = {new byte[][]{"foo".getBytes(), "bar".getBytes()}, "neither".getBytes(), new Object[]{new B(), X, Y}};
+        test(getInitialOptions(), EnumSet.allOf(DeoptimizationReason.class), "test1Snippet", args);
+    }
+
+    public static int test2Snippet(byte[][] haystack, byte[] needle, Object[] otherValues) {
+        Object someValue = otherValues[0];
+        Object anotherValue1 = otherValues[1];
+        Object anotherValue2 = otherValues[2];
+        if (haystack.length != 0) {
+            for (int i = 0; i < haystack.length; i++) {
+                byte[] hay = haystack[i];
+                if (equals(hay, needle)) {
+                    int result = 42;
+                    if (anotherValue1 == X) {
+                        if (anotherValue2 == Y) {
+                            result++;
+                            GraalDirectives.controlFlowAnchor();
+                        }
+                        GraalDirectives.controlFlowAnchor();
+                    }
+                    if (someValue == null || someValue.getClass() != A.class) {
+                        GraalDirectives.deoptimizeAndInvalidate();
+                    }
+                    GraalDirectives.controlFlowAnchor();
+                    return result;
+                }
+            }
+        }
+        return ((B) someValue).value();
+    }
+
+    @Test
+    public void test2() {
+        Object[] args = {new byte[][]{"foo".getBytes(), "bar".getBytes()}, "bad".getBytes(), new Object[]{new B(), X, Y}};
+        test(getInitialOptions(), EnumSet.allOf(DeoptimizationReason.class), "test2Snippet", args);
+    }
+
+    private static boolean simpleEquals(byte[] a, byte[] b) {
+        for (int i = 0; i < a.length; i++) {
+            if (a[i] != b[i]) {
+                return false;
+            }
+        }
+        return true;
+
+    }
+
+    // simplified and reduced version of test1Snippet
+    public static int test3Snippet(byte[][] haystack, byte[] needle, Object[] otherValues) {
+        Object someValue = otherValues[0];
+        Object anotherValue1 = otherValues[1];
+        // if (haystack.length != 0) {
+        for (int i = 0; i < haystack.length; i++) {
+            byte[] hay = haystack[i];
+            if (simpleEquals(hay, needle)) {
+                int result = 42;
+                if (anotherValue1 == X) {
+                    GraalDirectives.controlFlowAnchor();
+                }
+                if (someValue.getClass() != A.class) {
+                    GraalDirectives.deoptimizeAndInvalidate();
+                }
+                return result;
+            }
+        }
+        // }
+        return ((B) someValue).value();
+    }
+
+    @Test
+    public void test3() {
+        Object[] args = {new byte[][]{"foo".getBytes(), "bar".getBytes()}, "neither".getBytes(), new Object[]{new B(), X, Y}};
+        test(getInitialOptions(), EnumSet.allOf(DeoptimizationReason.class), "test3Snippet", args);
+    }
+
+}