Mercurial > hg > truffle
view graal/com.oracle.graal.tests/src/com/oracle/graal/compiler/tests/DegeneratedLoopsTest.java @ 5425:0364a2a874b8
changes towards a canonical representation of comparisons:
* new createNullCheckGuard helper method on CiLoweringTool
* replaced NullCheckNode with IsNullNode
* GuardNode and FixedGuardNode can be negated
* keep a list of conditions that are true/false in CheckCastEliminationPhase
* FixedGuardNode has only one condition
* GraphBuilderPhase creates canonical CompareNodes
* BooleanNodes can negate their usages
* added junit test for canonicalized compares
* removed junit test for negated instanceof
* added more thorough graph comparison for junit tests
* CheckCastEliminationPhase keeps track of conditions that are known to be true/false
author | Lukas Stadler <lukas.stadler@jku.at> |
---|---|
date | Tue, 22 May 2012 16:19:02 +0200 |
parents | e808627bd16f |
children | 4b47c0898e89 0083a59ced84 |
line wrap: on
line source
/* * 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.nodes.*; /** * In the following tests, the usages of local variable "a" are replaced with the integer constant 0. * Then canonicalization is applied and it is verified that the resulting graph is equal to the * graph of the method that just has a "return 1" statement in it. */ public class DegeneratedLoopsTest extends GraphTest { private static final String REFERENCE_SNIPPET = "referenceSnippet"; @SuppressWarnings("all") public static int referenceSnippet(int a) { return a; } @Test public void test1() { test("test1Snippet"); } private static class UnresolvedException extends RuntimeException { private static final long serialVersionUID = 5215434338750728440L; static { if (true) { throw new UnsupportedOperationException("this class may never be initialized"); } } } @SuppressWarnings("all") public static int test1Snippet(int a) { for (;;) { try { test(); break; } catch (UnresolvedException e) { } } return a; } private static void test() { } private void test(String snippet) { StructuredGraph graph = parse(snippet); Debug.dump(graph, "Graph"); for (Invoke invoke : graph.getInvokes()) { invoke.intrinsify(null); } new CanonicalizerPhase(null, runtime(), null).apply(graph); StructuredGraph referenceGraph = parse(REFERENCE_SNIPPET); Debug.dump(referenceGraph, "Graph"); assertEquals(referenceGraph, graph); } }