1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/opto/rootnode.hpp Sat Dec 01 00:00:00 2007 +0000
1.3 @@ -0,0 +1,62 @@
1.4 +/*
1.5 + * Copyright 1997-2005 Sun Microsystems, Inc. All Rights Reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.24 + * have any questions.
1.25 + *
1.26 + */
1.27 +
1.28 +//------------------------------RootNode---------------------------------------
1.29 +// The one-and-only before-all-else and after-all-else RootNode. The RootNode
1.30 +// represents what happens if the user runs the whole program repeatedly. The
1.31 +// RootNode produces the initial values of I/O and memory for the program or
1.32 +// procedure start.
1.33 +class RootNode : public LoopNode {
1.34 +public:
1.35 + RootNode( ) : LoopNode(0,0) {
1.36 + init_class_id(Class_Root);
1.37 + del_req(2);
1.38 + del_req(1);
1.39 + }
1.40 + virtual int Opcode() const;
1.41 + virtual const Node *is_block_proj() const { return this; }
1.42 + virtual const Type *bottom_type() const { return Type::BOTTOM; }
1.43 + virtual Node *Identity( PhaseTransform *phase ) { return this; }
1.44 + virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
1.45 + virtual const Type *Value( PhaseTransform *phase ) const { return Type::BOTTOM; }
1.46 +};
1.47 +
1.48 +//------------------------------HaltNode---------------------------------------
1.49 +// Throw an exception & die
1.50 +class HaltNode : public Node {
1.51 +public:
1.52 + HaltNode( Node *ctrl, Node *frameptr );
1.53 + virtual int Opcode() const;
1.54 + virtual bool pinned() const { return true; };
1.55 + virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
1.56 + virtual const Type *Value( PhaseTransform *phase ) const;
1.57 + virtual const Type *bottom_type() const;
1.58 + virtual bool is_CFG() const { return true; }
1.59 + virtual uint hash() const { return NO_HASH; } // CFG nodes do not hash
1.60 + virtual bool depends_only_on_test() const { return false; }
1.61 + virtual const Node *is_block_proj() const { return this; }
1.62 + virtual const RegMask &out_RegMask() const;
1.63 + virtual uint ideal_reg() const { return NotAMachineReg; }
1.64 + virtual uint match_edge(uint idx) const { return 0; }
1.65 +};
