Mercurial > hg > graal-compiler
view test/compiler/6603011/Test.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> |
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date | Mon, 02 Jan 2012 14:16:08 -0800 |
parents | 2fe998383789 |
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/* * Copyright (c) 2010, 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 6603011 * @summary long/int division by constant * * @run main/othervm -Xcomp -Xbatch -XX:-Inline Test */ // // -XX:-Inline is essential to this test so that verification functions // divi, modi, divl and modl generate "plain" divides. // -Xcomp -Xbatch are also useful to ensure the full range of // dividend and divisor combinations are tested // import java.net.*; class s { static int divi(int dividend, int divisor) { return dividend / divisor; } static int modi(int dividend, int divisor) { return dividend % divisor; } static long divl(long dividend, long divisor) { return dividend / divisor; } static long modl(long dividend, long divisor) { return dividend % divisor; } } public class Test implements Runnable { // Report verbose messages on failure; turn off to suppress // too much output with gross numbers of failures. static final boolean VERBOSE = true; // Initailize DIVISOR so that it is final in this class. static final int DIVISOR; static { int value = 0; try { value = Integer.decode(System.getProperty("divisor")); } catch (Throwable e) { } DIVISOR = value; } // The methods of interest. We want the JIT to compile these // and convert the divide into a multiply. public int divbyI (int dividend) { return dividend / DIVISOR; } public int modbyI (int dividend) { return dividend % DIVISOR; } public long divbyL (long dividend) { return dividend / DIVISOR; } public long modbyL (long dividend) { return dividend % DIVISOR; } public int divisor() { return DIVISOR; } public boolean checkI (int dividend) { int quo = divbyI(dividend); int rem = modbyI(dividend); int quo0 = s.divi(dividend, divisor()); int rem0 = s.modi(dividend, divisor()); if (quo != quo0 || rem != rem0) { if (VERBOSE) { System.out.println("Computed: " + dividend + " / " + divisor() + " = " + quo + ", " + dividend + " % " + divisor() + " = " + rem ); System.out.println("expected: " + dividend + " / " + divisor() + " = " + quo0 + ", " + dividend + " % " + divisor() + " = " + rem0); // Report sign of rem failure if (rem != 0 && (rem ^ dividend) < 0) { System.out.println(" rem & dividend have different signs"); } // Report range of rem failure if (java.lang.Math.abs(rem) >= java.lang.Math.abs(divisor())) { System.out.println(" remainder out of range"); } // Report quo/rem identity relationship failure if ((quo * divisor()) + rem != dividend) { System.out.println(" quotien/remainder invariant broken"); } } return false; } return true; } public boolean checkL (long dividend) { long quo = divbyL(dividend); long rem = modbyL(dividend); long quo0 = s.divl(dividend, divisor()); long rem0 = s.modl(dividend, divisor()); if (quo != quo0 || rem != rem0) { if (VERBOSE) { System.out.println("Computed: " + dividend + " / " + divisor() + " = " + quo + ", " + dividend + " % " + divisor() + " = " + rem ); System.out.println("expected: " + dividend + " / " + divisor() + " = " + quo0 + ", " + dividend + " % " + divisor() + " = " + rem0); // Report sign of rem failure if (rem != 0 && (rem ^ dividend) < 0) { System.out.println(" rem & dividend have different signs"); } // Report range of rem failure if (java.lang.Math.abs(rem) >= java.lang.Math.abs(divisor())) { System.out.println(" remainder out of range"); } // Report quo/rem identity relationship failure if ((quo * divisor()) + rem != dividend) { System.out.println(" (" + quo + " * " + divisor() + ") + " + rem + " != " + dividend); } } return false; } return true; } public void run() { // Don't try to divide by zero if (divisor() == 0) return; // Range of dividends to check. Try dividends from start to end // inclusive, as well as variations on those values as shifted // left. int start = -1024; int end = 1024; // Test int division using a variety of dividends. int wrong = 0; int total = 0; outerloop: for (int i = start; i <= end; i++) { for (int s = 0; s < 32; s += 4) { total++; int dividend = i << s; if (!checkI(dividend)) { wrong++; // Stop on the first failure // break outerloop; } } } if (wrong > 0) { System.out.println("divisor " + divisor() + ": " + wrong + "/" + total + " wrong int divisions"); } // Test long division using a variety of dividends. wrong = 0; total = 0; outerloop: for (int i = start; i <= end; i++) { for (int s = 0; s < 64; s += 4) { total++; long dividend = ((long)i) << s; if (!checkL(dividend)) { wrong++; // Stop on the first failure // break outerloop; } } } if (wrong > 0) { System.out.println("divisor " + divisor() + ": " + wrong + "/" + total + " wrong long divisions"); } } // Reload this class with the "divisor" property set to the input parameter. // This allows the JIT to see q.DIVISOR as a final constant, and change // any divisions or mod operations into multiplies. public static void test_divisor(int divisor, URLClassLoader apploader) throws Exception { System.setProperty("divisor", "" + divisor); ClassLoader loader = new URLClassLoader(apploader.getURLs(), apploader.getParent()); Class c = loader.loadClass("Test"); Runnable r = (Runnable)c.newInstance(); r.run(); } public static void main(String[] args) throws Exception { Class cl = Class.forName("Test"); URLClassLoader apploader = (URLClassLoader)cl.getClassLoader(); // Test every divisor between -100 and 100. for (int i = -100; i <= 100; i++) { test_divisor(i, apploader); } // Try a few divisors outside the typical range. // The values below have been observed in rt.jar. test_divisor(101, apploader); test_divisor(400, apploader); test_divisor(1000, apploader); test_divisor(3600, apploader); test_divisor(9973, apploader); test_divisor(86400, apploader); test_divisor(1000000, apploader); } }