| /* |
| * Copyright (c) 1997, 2015, 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. |
| * |
| */ |
| |
| #ifndef SHARE_VM_OPTO_ROOTNODE_HPP |
| #define SHARE_VM_OPTO_ROOTNODE_HPP |
| |
| #include "opto/loopnode.hpp" |
| |
| //------------------------------RootNode--------------------------------------- |
| // The one-and-only before-all-else and after-all-else RootNode. The RootNode |
| // represents what happens if the user runs the whole program repeatedly. The |
| // RootNode produces the initial values of I/O and memory for the program or |
| // procedure start. |
| class RootNode : public LoopNode { |
| public: |
| RootNode( ) : LoopNode(0,0) { |
| init_class_id(Class_Root); |
| del_req(2); |
| del_req(1); |
| } |
| virtual int Opcode() const; |
| virtual const Node *is_block_proj() const { return this; } |
| virtual const Type *bottom_type() const { return Type::BOTTOM; } |
| virtual Node* Identity(PhaseGVN* phase) { return this; } |
| virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); |
| virtual const Type* Value(PhaseGVN* phase) const { return Type::BOTTOM; } |
| }; |
| |
| //------------------------------HaltNode--------------------------------------- |
| // Throw an exception & die |
| class HaltNode : public Node { |
| public: |
| HaltNode( Node *ctrl, Node *frameptr ); |
| virtual int Opcode() const; |
| virtual bool pinned() const { return true; }; |
| virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); |
| virtual const Type* Value(PhaseGVN* phase) const; |
| virtual const Type *bottom_type() const; |
| virtual bool is_CFG() const { return true; } |
| virtual uint hash() const { return NO_HASH; } // CFG nodes do not hash |
| virtual bool depends_only_on_test() const { return false; } |
| virtual const Node *is_block_proj() const { return this; } |
| virtual const RegMask &out_RegMask() const; |
| virtual uint ideal_reg() const { return NotAMachineReg; } |
| virtual uint match_edge(uint idx) const { return 0; } |
| |
| #ifndef PRODUCT |
| virtual void related(GrowableArray<Node*> *in_rel, GrowableArray<Node*> *out_rel, bool compact) const; |
| #endif |
| }; |
| |
| #endif // SHARE_VM_OPTO_ROOTNODE_HPP |