# HG changeset patch
# User Gilles Duboscq <duboscq@ssw.jku.at>
# Date 1347030669 -7200
# Node ID 270fc8772a10e0d49cbd006b75bb9376d419c676
# Parent  13d534a47ba30a543c3609e0a8e02e12cd5bc08b
A a simple loop unswitching white box test

diff -r 13d534a47ba3 -r 270fc8772a10 graal/com.oracle.graal.tests/src/com/oracle/graal/compiler/tests/LoopUnswitchTest.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.graal.tests/src/com/oracle/graal/compiler/tests/LoopUnswitchTest.java	Fri Sep 07 17:11:09 2012 +0200
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2011, 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.tests;
+
+import org.junit.*;
+
+import com.oracle.graal.compiler.phases.*;
+import com.oracle.graal.debug.*;
+import com.oracle.graal.graph.*;
+import com.oracle.graal.nodes.*;
+
+public class LoopUnswitchTest extends GraalCompilerTest {
+
+    @SuppressWarnings("all")
+    public static int referenceSnippet1(int a) {
+        int sum = 0;
+        if (a > 2) {
+            for (int i = 0; i < 1000; i++) {
+                sum += 2;
+            }
+        } else {
+            for (int i = 0; i < 1000; i++) {
+                sum += a;
+            }
+        }
+        return sum;
+    }
+
+    @SuppressWarnings("all")
+    public static int test1Snippet(int a) {
+        int sum = 0;
+        for (int i = 0; i < 1000; i++) {
+            if (a > 2) {
+                sum += 2;
+            } else {
+                sum += a;
+            }
+        }
+        return sum;
+    }
+
+    @Test
+    public void test1() {
+        test("test1Snippet", "referenceSnippet1");
+    }
+
+    private void test(String snippet, String referenceSnippet) {
+        final StructuredGraph graph = parse(snippet);
+        final StructuredGraph referenceGraph = parse(referenceSnippet);
+
+        new LoopTransformLowPhase().apply(graph);
+
+        // Framestates create comparison problems
+        for (Node stateSplit : graph.getNodes().filterInterface(StateSplit.class)) {
+            ((StateSplit) stateSplit).setStateAfter(null);
+        }
+        for (Node stateSplit : referenceGraph.getNodes().filterInterface(StateSplit.class)) {
+            ((StateSplit) stateSplit).setStateAfter(null);
+        }
+
+        new CanonicalizerPhase(null, runtime(), null).apply(graph);
+        new CanonicalizerPhase(null, runtime(), null).apply(referenceGraph);
+        Debug.scope("Test", new DebugDumpScope("Test:" + snippet), new Runnable() {
+            @Override
+            public void run() {
+                assertEquals(referenceGraph, graph);
+            }
+        });
+    }
+}