Mercurial > hg > truffle
view test/compiler/intrinsics/mathexact/Verify.java @ 12543:37207d7e9056
Fix exception during canonicalization (GRAAL-554): when killing the branch following a FixedGuard, we can not count on this removing all of our usages because some of them may already be dead
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Wed, 23 Oct 2013 17:50:58 +0200 |
parents | c9ccd7b85f20 |
children | 59e8ad757e19 |
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/* * Copyright (c) 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. */ public class Verify { public static String throwWord(boolean threw) { return (threw ? "threw" : "didn't throw"); } public static void verify(int a, int b) { boolean exception1 = false, exception2 = false; int result1 = 0, result2 = 0; try { result1 = testIntrinsic(a, b); } catch (ArithmeticException e) { exception1 = true; } try { result2 = testNonIntrinsic(a, b); } catch (ArithmeticException e) { exception2 = true; } if (exception1 != exception2) { throw new RuntimeException("Intrinsic version " + throwWord(exception1) + " exception, NonIntrinsic version " + throwWord(exception2) + " for: " + a + " + " + b); } if (result1 != result2) { throw new RuntimeException("Intrinsic version returned: " + a + " while NonIntrinsic version returned: " + b); } } public static int testIntrinsic(int a, int b) { return java.lang.Math.addExact(a, b); } public static int testNonIntrinsic(int a, int b) { return safeAddExact(a, b); } // Copied java.lang.Math.addExact to avoid intrinsification public static int safeAddExact(int x, int y) { int r = x + y; // HD 2-12 Overflow iff both arguments have the opposite sign of the result if (((x ^ r) & (y ^ r)) < 0) { throw new ArithmeticException("integer overflow"); } return r; } }