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/*
* Copyright (c) 2022, 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.
*/
super public class TestInfiniteLoopWithUnmergedBackedges
{
public Method "<init>":"()V"
stack 2 locals 1
{
aload_0;
invokespecial Method java/lang/Object."<init>":"()V";
return;
}
static Method test_001:"(IIIII)V"
stack 5 locals 10
{
iload_0;
ifgt LOOP;
// below is dominated by the one above
iload_0;
ifle BACK;
goto HEAD;
HEAD:
iload_3;
ifeq BACK;
BACK:
goto HEAD;
LOOP:
iload_1;
iflt LOOP;
iload_2;
iflt LOOP;
return;
}
static Method test_002:"(IIIII)V"
stack 5 locals 30
{
iload_0;
ifgt LOOP;
iconst_0;
istore 9;
goto HEAD;
TAIL:
iload_3;
iload 9;
if_icmpeq HEAD;
iinc 9, 1;
HEAD:
goto TAIL;
LOOP:
iload_1;
iflt LOOP;
iload_2;
iflt LOOP;
return;
}
static Method test_003:"(IIIII)I"
stack 5 locals 30
{
iload_0;
ifgt SKIP;
iconst_0;
istore 9;
goto HEAD;
TAIL:
iload_3;
iload 9;
if_icmpeq HEAD;
iinc 9, 1;
// Two paths lead to HEAD, so we have an inner and outer loop
// But no SafePoint is placed here, because we go forward in bci
HEAD:
// SafePoint is placed here, because we go from here back in bci
goto TAIL;
SKIP:
iconst_0;
istore 8;
iconst_0;
istore 9;
// loop with two backedges, which calls
// merge_many_backedges and then recomputes
// build_loop_tree
LOOP:
iinc 9, 1;
iinc 8, -1;
iload 9;
ldc 7;
irem;
ifeq LOOP;
iload 9;
ldc 10001;
if_icmple LOOP;
iload 8;
ireturn;
}
static Method test_004:"(IIIII)I"
stack 5 locals 30
{
iload_0;
ifgt SKIP;
iconst_0;
istore 9;
goto HEAD;
TAIL:
iload_3;
iload 9;
if_icmpeq HEAD;
iinc 9, 1;
iload 9;
ldc 10001;
if_icmpeq HEAD; // a second one
iinc 9, 1;
HEAD:
goto TAIL;
SKIP:
iconst_0;
istore 8;
iconst_0;
istore 9;
LOOP:
iinc 9, 1;
iinc 8, -1;
iload 9;
ldc 7;
irem;
ifeq LOOP;
iload 9;
ldc 10001;
if_icmple LOOP;
iload 8;
ireturn;
}
static Method test_005:"(IIIII)I"
stack 5 locals 30
{
iload_0;
ifgt SKIP;
iconst_0;
istore 9;
goto HEAD;
TAIL:
iload_3;
iload 9;
if_icmpeq HEAD;
iinc 9, 1;
iload 9;
ldc 10001;
if_icmpeq HEAD; // a second one
iinc 9, 1;
HEAD:
goto TAIL;
SKIP:
iconst_0;
istore 8;
iconst_0;
istore 9;
LOOP:
iinc 9, 1;
iinc 8, -1;
iload 9;
ldc 7;
irem;
ifeq LOOP;
iload 9;
ldc 10001;
if_icmple LOOP;
iload 8;
ireturn;
}
}
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