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/*
* Copyright (c) 2002, 2020, 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
*
* @summary converted from VM Testbase runtime/jbe/dead/dead05.
* VM Testbase keywords: [quick, runtime]
*
* @library /vmTestbase
* /test/lib
* @run main/othervm vm.compiler.jbe.dead.dead05.dead05
*/
package vm.compiler.jbe.dead.dead05;
/* -- Test the elimination of dead assignment to static class field
In the example below, all the values assigned to i in struct except of the last one are never used,thus can be eliminated.
*/
class struct {
static int i = 6;
}
public class dead05 {
public static void main(String args[]) {
dead05 dce = new dead05();
System.out.println("f()="+dce.f()+"; fopt()="+dce.fopt());
if (dce.f() == dce.fopt()) {
System.out.println("Test dead05 Passed.");
} else {
throw new Error("Test dead05 Failed: f()=" + dce.f() + " != fopt()=" + dce.fopt());
}
}
int f() {
struct.i = 1;
struct.i = 2;
struct.i = 3;
struct.i = 4;
struct.i = 5;
struct.i = 6;
struct.i = 7;
struct.i = 8;
struct.i = 1;
struct.i = 2;
struct.i = 3;
struct.i = 4;
struct.i = 5;
struct.i = 6;
struct.i = 7;
struct.i = 8;
struct.i = 1;
struct.i = 2;
struct.i = 3;
struct.i = 4;
struct.i = 5;
struct.i = 6;
struct.i = 7;
struct.i = 8;
return struct.i;
}
// Code fragment after dead code elimination
int fopt() {
struct.i = 8;
return struct.i;
}
}
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