Mercurial > hg > graal-compiler
view test/compiler/5091921/Test6897150.java @ 4181:319860ae697a
Simplify FrameMap: make offsets of spill slots and outgoing parameters independent so that they can be allocated at the same time, eliminating the separate phases. This makes the separate StackBlock unnecesary. Change CiStackSlot to use byte offsets instead of spill slot index. This makes CiTarget.spillSlotSize unnecessary.
author | Christian Wimmer <Christian.Wimmer@Oracle.com> |
---|---|
date | Mon, 02 Jan 2012 14:16:08 -0800 |
parents | bad7ecd0b6ed |
children |
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. * */ /** * @test * @bug 6897150 * @summary Hotspot optimises away a valid loop * * @run main Test6897150 */ // Should be compiled with javac from JDK1.3 to get bytecode which shows the problem. public class Test6897150 { public static void main(String[] args) { // This works loopAndPrint(Integer.MAX_VALUE -1); // This doesn't loopAndPrint(Integer.MAX_VALUE); } static void verify(int max, int a) { if ( a != (max - 1)) { System.out.println("Expected: " + (max - 1)); System.out.println("Actual : " + a); System.exit(97); } } static void loopAndPrint(int max) { int a = -1; int i = 1; for (; i < max; i++) { a = i; } verify(max, a); } }