# HG changeset patch
# User Lukas Stadler <lukas.stadler@jku.at>
# Date 1373548430 -7200
# Node ID e35a72e32aae8b27e4afbf9d75f415a45335111c
# Parent  0e671d5268d1559d6960fd57257f01aeeb9e1d2c
add test for early read elimination

diff -r 0e671d5268d1 -r e35a72e32aae graal/com.oracle.graal.compiler.test/src/com/oracle/graal/compiler/test/ea/PEAReadEliminationTest.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.graal.compiler.test/src/com/oracle/graal/compiler/test/ea/PEAReadEliminationTest.java	Thu Jul 11 15:13:50 2013 +0200
@@ -0,0 +1,230 @@
+/*
+ * Copyright (c) 2011, 2013, 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 com.oracle.graal.compiler.test.ea;
+
+import static org.junit.Assert.*;
+
+import java.util.concurrent.*;
+
+import org.junit.*;
+
+import com.oracle.graal.api.code.*;
+import com.oracle.graal.compiler.test.*;
+import com.oracle.graal.nodes.*;
+import com.oracle.graal.nodes.java.*;
+import com.oracle.graal.phases.*;
+import com.oracle.graal.phases.common.*;
+import com.oracle.graal.phases.tiers.*;
+import com.oracle.graal.virtual.phases.ea.*;
+
+public class PEAReadEliminationTest extends GraalCompilerTest {
+
+    private StructuredGraph graph;
+
+    public static Object staticField;
+
+    public static class TestObject implements Callable<Integer> {
+
+        public int x;
+        public int y;
+
+        public TestObject(int x, int y) {
+            this.x = x;
+            this.y = y;
+        }
+
+        @Override
+        public Integer call() throws Exception {
+            return x;
+        }
+    }
+
+    public static class TestObject2 {
+
+        public Object x;
+        public Object y;
+
+        public TestObject2(Object x, Object y) {
+            this.x = x;
+            this.y = y;
+        }
+    }
+
+    @SuppressWarnings("all")
+    public static int testSimpleSnippet(TestObject a) {
+        a.x = 2;
+        staticField = a;
+        return a.x;
+    }
+
+    @Test
+    public void testSimple() {
+        ValueNode result = getReturn("testSimpleSnippet").result();
+        assertTrue(graph.getNodes(LoadFieldNode.class).isEmpty());
+        assertTrue(result.isConstant());
+        assertEquals(2, result.asConstant().asInt());
+    }
+
+    @SuppressWarnings("all")
+    public static int testSimpleConflictSnippet(TestObject a, TestObject b) {
+        a.x = 2;
+        b.x = 3;
+        staticField = a;
+        return a.x;
+    }
+
+    @Test
+    public void testSimpleConflict() {
+        ValueNode result = getReturn("testSimpleConflictSnippet").result();
+        assertFalse(result.isConstant());
+        assertTrue(result instanceof LoadFieldNode);
+    }
+
+    @SuppressWarnings("all")
+    public static int testParamSnippet(TestObject a, int b) {
+        a.x = b;
+        return a.x;
+    }
+
+    @Test
+    public void testParam() {
+        ValueNode result = getReturn("testParamSnippet").result();
+        assertTrue(graph.getNodes(LoadFieldNode.class).isEmpty());
+        assertEquals(graph.getLocal(1), result);
+    }
+
+    @SuppressWarnings("all")
+    public static int testMaterializedSnippet(int a) {
+        TestObject obj = new TestObject(a, 0);
+        staticField = obj;
+        return obj.x;
+    }
+
+    @Test
+    public void testMaterialized() {
+        ValueNode result = getReturn("testMaterializedSnippet").result();
+        assertTrue(graph.getNodes(LoadFieldNode.class).isEmpty());
+        assertEquals(graph.getLocal(0), result);
+    }
+
+    @SuppressWarnings("all")
+    public static int testSimpleLoopSnippet(TestObject obj, int a, int b) {
+        obj.x = a;
+        for (int i = 0; i < 10; i++) {
+            staticField = obj;
+        }
+        return obj.x;
+    }
+
+    @Test
+    public void testSimpleLoop() {
+        ValueNode result = getReturn("testSimpleLoopSnippet").result();
+        assertTrue(graph.getNodes(LoadFieldNode.class).isEmpty());
+        assertEquals(graph.getLocal(1), result);
+    }
+
+    @SuppressWarnings("all")
+    public static int testBadLoopSnippet(TestObject obj, TestObject obj2, int a, int b) {
+        obj.x = a;
+        for (int i = 0; i < 10; i++) {
+            staticField = obj;
+            obj2.x = 10;
+            obj.x = 0;
+        }
+        return obj.x;
+    }
+
+    @Test
+    public void testBadLoop() {
+        ValueNode result = getReturn("testBadLoopSnippet").result();
+        assertEquals(0, graph.getNodes(LoadFieldNode.class).count());
+        assertTrue(result instanceof ProxyNode);
+        assertTrue(((ProxyNode) result).value() instanceof PhiNode);
+    }
+
+    @SuppressWarnings("all")
+    public static int testBadLoop2Snippet(TestObject obj, TestObject obj2, int a, int b) {
+        obj.x = a;
+        for (int i = 0; i < 10; i++) {
+            obj.x = 0;
+            obj2.x = 10;
+        }
+        return obj.x;
+    }
+
+    @Test
+    public void testBadLoop2() {
+        ValueNode result = getReturn("testBadLoop2Snippet").result();
+        assertEquals(1, graph.getNodes(LoadFieldNode.class).count());
+        assertTrue(result instanceof LoadFieldNode);
+    }
+
+    @SuppressWarnings("all")
+    public static int testPhiSnippet(TestObject a, int b) {
+        if (b < 0) {
+            a.x = 1;
+        } else {
+            a.x = 2;
+        }
+        return a.x;
+    }
+
+    @Test
+    public void testPhi() {
+        ValueNode result = getReturn("testPhiSnippet").result();
+        assertTrue(graph.getNodes(LoadFieldNode.class).isEmpty());
+        assertTrue(result instanceof PhiNode);
+        PhiNode phi = (PhiNode) result;
+        assertTrue(phi.valueAt(0).isConstant());
+        assertTrue(phi.valueAt(1).isConstant());
+        assertEquals(1, phi.valueAt(0).asConstant().asInt());
+        assertEquals(2, phi.valueAt(1).asConstant().asInt());
+    }
+
+    @SuppressWarnings("all")
+    public static void testSimpleStoreSnippet(TestObject a, int b) {
+        a.x = b;
+        a.x = b;
+    }
+
+    @Test
+    public void testSimpleStore() {
+        processMethod("testSimpleStoreSnippet");
+        assertEquals(1, graph.getNodes().filter(StoreFieldNode.class).count());
+    }
+
+    final ReturnNode getReturn(String snippet) {
+        processMethod(snippet);
+        assertEquals(1, graph.getNodes(ReturnNode.class).count());
+        return graph.getNodes(ReturnNode.class).first();
+    }
+
+    private void processMethod(final String snippet) {
+        graph = parse(snippet);
+        Assumptions assumptions = new Assumptions(false);
+        HighTierContext context = new HighTierContext(runtime(), assumptions, replacements);
+        new InliningPhase(runtime(), null, replacements, assumptions, null, getDefaultPhasePlan(), OptimisticOptimizations.ALL).apply(graph);
+        CanonicalizerPhase canonicalizer = new CanonicalizerPhase(true);
+        new PartialEscapePhase(false, true, canonicalizer).apply(graph, context);
+    }
+}