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8028207: assert(_outcnt==1) failed: not unique in compile.cpp

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Reviewed-by: iveresov, kvn
This commit is contained in:
Rickard Bäckman 2013-11-12 14:52:48 +01:00
parent 0ef4539a9f
commit 9c845933bd
2 changed files with 61 additions and 1 deletions
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2
hotspot/src/share/vm/opto/mathexactnode.hpp
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@ -49,7 +49,7 @@ public:
virtual Node* Identity(PhaseTransform* phase) { return this; }
virtual Node* Ideal(PhaseGVN* phase, bool can_reshape) { return NULL; }
virtual const Type* Value(PhaseTransform* phase) const { return bottom_type(); }
virtual uint hash() const { return Node::hash(); }
virtual uint hash() const { return NO_HASH; }
virtual bool is_CFG() const { return false; }
virtual uint ideal_reg() const { return NotAMachineReg; }

60
hotspot/test/compiler/intrinsics/mathexact/GVNTest.java Normal file
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@ -0,0 +1,60 @@
/*
* 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.
*/
/*
* @test
* @bug 8028207
* @summary Verify that GVN doesn't mess up the two addExacts
* @compile GVNTest.java
* @run main GVNTest
*
*/
public class GVNTest {
public static int result = 0;
public static int value = 93;
public static void main(String[] args) {
for (int i = 0; i < 50000; ++i) {
result = runTest(value + i);
result = runTest(value + i);
result = runTest(value + i);
result = runTest(value + i);
result = runTest(value + i);
}
}
public static int runTest(int value) {
int v = value + value;
int sum = 0;
if (v < 4032) {
for (int i = 0; i < 1023; ++i) {
sum += Math.addExact(value, value);
}
} else {
for (int i = 0; i < 321; ++i) {
sum += Math.addExact(value, value);
}
}
return sum + v;
}
}