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src/share/vm/opto/rootnode.hpp@69ea58782b1a (annotated)
src/share/vm/opto/rootnode.hpp
Thu, 31 Jul 2014 19:59:36 +0200
- author
- roland
- date
- Thu, 31 Jul 2014 19:59:36 +0200
- changeset 7003
- 69ea58782b1a
- parent 2314
- f95d63e2154a
- child 6876
- 710a3c8b516e
- permissions
- -rw-r--r--
8054054: 8040121 is broken
Summary: C++ code pattern from 8040121 is incorrect
Reviewed-by: kvn
| duke@435 | 1 | /* |
| stefank@2314 | 2 | * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
| duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| duke@435 | 4 | * |
| duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
| duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| duke@435 | 7 | * published by the Free Software Foundation. |
| duke@435 | 8 | * |
| duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| duke@435 | 13 | * accompanied this code). |
| duke@435 | 14 | * |
| duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
| duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| duke@435 | 18 | * |
| trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
| trims@1907 | 21 | * questions. |
| duke@435 | 22 | * |
| duke@435 | 23 | */ |
| duke@435 | 24 | |
| stefank@2314 | 25 | #ifndef SHARE_VM_OPTO_ROOTNODE_HPP |
| stefank@2314 | 26 | #define SHARE_VM_OPTO_ROOTNODE_HPP |
| stefank@2314 | 27 | |
| stefank@2314 | 28 | #include "opto/loopnode.hpp" |
| stefank@2314 | 29 | |
| duke@435 | 30 | //------------------------------RootNode--------------------------------------- |
| duke@435 | 31 | // The one-and-only before-all-else and after-all-else RootNode. The RootNode |
| duke@435 | 32 | // represents what happens if the user runs the whole program repeatedly. The |
| duke@435 | 33 | // RootNode produces the initial values of I/O and memory for the program or |
| duke@435 | 34 | // procedure start. |
| duke@435 | 35 | class RootNode : public LoopNode { |
| duke@435 | 36 | public: |
| duke@435 | 37 | RootNode( ) : LoopNode(0,0) { |
| duke@435 | 38 | init_class_id(Class_Root); |
| duke@435 | 39 | del_req(2); |
| duke@435 | 40 | del_req(1); |
| duke@435 | 41 | } |
| duke@435 | 42 | virtual int Opcode() const; |
| duke@435 | 43 | virtual const Node *is_block_proj() const { return this; } |
| duke@435 | 44 | virtual const Type *bottom_type() const { return Type::BOTTOM; } |
| duke@435 | 45 | virtual Node *Identity( PhaseTransform *phase ) { return this; } |
| duke@435 | 46 | virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); |
| duke@435 | 47 | virtual const Type *Value( PhaseTransform *phase ) const { return Type::BOTTOM; } |
| duke@435 | 48 | }; |
| duke@435 | 49 | |
| duke@435 | 50 | //------------------------------HaltNode--------------------------------------- |
| duke@435 | 51 | // Throw an exception & die |
| duke@435 | 52 | class HaltNode : public Node { |
| duke@435 | 53 | public: |
| duke@435 | 54 | HaltNode( Node *ctrl, Node *frameptr ); |
| duke@435 | 55 | virtual int Opcode() const; |
| duke@435 | 56 | virtual bool pinned() const { return true; }; |
| duke@435 | 57 | virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); |
| duke@435 | 58 | virtual const Type *Value( PhaseTransform *phase ) const; |
| duke@435 | 59 | virtual const Type *bottom_type() const; |
| duke@435 | 60 | virtual bool is_CFG() const { return true; } |
| duke@435 | 61 | virtual uint hash() const { return NO_HASH; } // CFG nodes do not hash |
| duke@435 | 62 | virtual bool depends_only_on_test() const { return false; } |
| duke@435 | 63 | virtual const Node *is_block_proj() const { return this; } |
| duke@435 | 64 | virtual const RegMask &out_RegMask() const; |
| duke@435 | 65 | virtual uint ideal_reg() const { return NotAMachineReg; } |
| duke@435 | 66 | virtual uint match_edge(uint idx) const { return 0; } |
| duke@435 | 67 | }; |
| stefank@2314 | 68 | |
| stefank@2314 | 69 | #endif // SHARE_VM_OPTO_ROOTNODE_HPP |
