hotspot/test/compiler/rangechecks/TestRangeCheckExceptionHandlerLoop.jasm
author roland
Wed, 02 Dec 2015 15:13:42 +0100
changeset 35097 cd29ef2a189d
child 40059 c2304140ed64
permissions -rw-r--r--
8134883: C1 hard crash in range check elimination in Nashorn test262parallel Summary: C1's range check elimination breaks with a non-natural loop that has an exception handler as one entry Reviewed-by: iveresov
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/*
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 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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super public class TestRangeCheckExceptionHandlerLoop
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	version 51:0
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{
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public Method "<init>":"()V"
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	stack 1 locals 1
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{
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		aload_0;
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		invokespecial	Method java/lang/Object."<init>":"()V";
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		return;
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}
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/* This method has an irreducible loop, with 2 entries, one is the exception handler
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    static void test(boolean flag, int[] array, Exception exception) throws Exception {
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        int i = 0;
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        if (flag) {
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            try {
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                throw exception;
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            } catch(Exception e) {
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                array[i] = 0;
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                i++;
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            }
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        }
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        if (i < 10) {
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            throw exception; // caught by exception handler above as well
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        }
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    }
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*/
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public static Method test:"(Z[ILjava/lang/Exception;)V"
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	throws java/lang/Exception
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	stack 3 locals 5
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{
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		iconst_0;
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		istore_3;
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		iload_0;
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		ifeq	L17;
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		try t0;
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		aload_2;
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		athrow;
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		endtry t0;
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		catch t0 java/lang/Exception;
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		catch t1 java/lang/Exception;
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		stack_frame_type full;
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		locals_map int, class "[I", class java/lang/Exception, int;
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		stack_map class java/lang/Exception;
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		astore	4;
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		aload_1;
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		iload_3;
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		iconst_0;
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		iastore;
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		iinc	3, 1;
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	L17:	stack_frame_type same;
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		iload_3;
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		bipush	10;
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		if_icmpge	L25;
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		try t1;
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		aload_2;
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		athrow;
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		endtry t1;
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	L25:	stack_frame_type same;
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		return;
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}
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} // end Class TestRangeCheckExceptionHandlerLoop