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Unit tests for GraalDirectives API.
author Roland Schatz <roland.schatz@oracle.com>
date Thu, 29 Jan 2015 16:49:03 +0100
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19045:862997951c0a 19046:2358c0e65b9e
1 /*
2 * Copyright (c) 2015, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23 package com.oracle.graal.api.directives.test;
24
25 import org.junit.*;
26
27 import com.oracle.graal.api.directives.*;
28 import com.oracle.graal.compiler.test.*;
29 import com.oracle.graal.graph.iterators.*;
30 import com.oracle.graal.nodes.*;
31
32 public class IterationDirectiveTest extends GraalCompilerTest {
33
34 public static int loopFrequencySnippet(int arg) {
35 int x = arg;
36 while (GraalDirectives.injectIterationCount(128, x > 1)) {
37 GraalDirectives.controlFlowAnchor(); // prevent loop peeling or unrolling
38 if (x % 2 == 0) {
39 x /= 2;
40 } else {
41 x = 3 * x + 1;
42 }
43 }
44 return x;
45 }
46
47 @Test
48 public void testLoopFrequency() {
49 test("loopFrequencySnippet", 7);
50 }
51
52 @Override
53 protected boolean checkLowTierGraph(StructuredGraph graph) {
54 NodeIterable<LoopBeginNode> loopBeginNodes = graph.getNodes(LoopBeginNode.class);
55 Assert.assertEquals("LoopBeginNode count", 1, loopBeginNodes.count());
56
57 LoopBeginNode loopBeginNode = loopBeginNodes.first();
58 Assert.assertEquals("loop frequency of " + loopBeginNode, 128, loopBeginNode.loopFrequency(), 0);
59
60 return true;
61 }
62 }