1 /* 2 * Copyright (c) 2006, 2008, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "incls/_precompiled.incl" 26 #include "incls/_loopUnswitch.cpp.incl" 27 28 //================= Loop Unswitching ===================== 29 // 30 // orig: transformed: 31 // if (invariant-test) then 32 // loop loop 33 // stmt1 stmt1 34 // if (invariant-test) then stmt2 35 // stmt2 stmt4 36 // else endloop 37 // stmt3 else 38 // endif loop [clone] 39 // stmt4 stmt1 [clone] 40 // endloop stmt3 41 // stmt4 [clone] 42 // endloop 43 // endif 44 // 45 // Note: the "else" clause may be empty 46 | 1 /* 2 * Copyright (c) 2006, 2010, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "memory/allocation.inline.hpp" 27 #include "opto/connode.hpp" 28 #include "opto/loopnode.hpp" 29 #include "opto/rootnode.hpp" 30 31 //================= Loop Unswitching ===================== 32 // 33 // orig: transformed: 34 // if (invariant-test) then 35 // loop loop 36 // stmt1 stmt1 37 // if (invariant-test) then stmt2 38 // stmt2 stmt4 39 // else endloop 40 // stmt3 else 41 // endif loop [clone] 42 // stmt4 stmt1 [clone] 43 // endloop stmt3 44 // stmt4 [clone] 45 // endloop 46 // endif 47 // 48 // Note: the "else" clause may be empty 49 |