Mercurial > hg > graal-compiler
annotate src/share/vm/opto/rootnode.hpp @ 4115:1bd45abaa507
6890673: Eliminate allocations immediately after EA
Summary: Try to eliminate allocations and related locks immediately after escape analysis.
Reviewed-by: never
author | kvn |
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date | Wed, 16 Nov 2011 09:13:57 -0800 |
parents | f95d63e2154a |
children |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_OPTO_ROOTNODE_HPP |
26 #define SHARE_VM_OPTO_ROOTNODE_HPP | |
27 | |
28 #include "opto/loopnode.hpp" | |
29 | |
0 | 30 //------------------------------RootNode--------------------------------------- |
31 // The one-and-only before-all-else and after-all-else RootNode. The RootNode | |
32 // represents what happens if the user runs the whole program repeatedly. The | |
33 // RootNode produces the initial values of I/O and memory for the program or | |
34 // procedure start. | |
35 class RootNode : public LoopNode { | |
36 public: | |
37 RootNode( ) : LoopNode(0,0) { | |
38 init_class_id(Class_Root); | |
39 del_req(2); | |
40 del_req(1); | |
41 } | |
42 virtual int Opcode() const; | |
43 virtual const Node *is_block_proj() const { return this; } | |
44 virtual const Type *bottom_type() const { return Type::BOTTOM; } | |
45 virtual Node *Identity( PhaseTransform *phase ) { return this; } | |
46 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
47 virtual const Type *Value( PhaseTransform *phase ) const { return Type::BOTTOM; } | |
48 }; | |
49 | |
50 //------------------------------HaltNode--------------------------------------- | |
51 // Throw an exception & die | |
52 class HaltNode : public Node { | |
53 public: | |
54 HaltNode( Node *ctrl, Node *frameptr ); | |
55 virtual int Opcode() const; | |
56 virtual bool pinned() const { return true; }; | |
57 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
58 virtual const Type *Value( PhaseTransform *phase ) const; | |
59 virtual const Type *bottom_type() const; | |
60 virtual bool is_CFG() const { return true; } | |
61 virtual uint hash() const { return NO_HASH; } // CFG nodes do not hash | |
62 virtual bool depends_only_on_test() const { return false; } | |
63 virtual const Node *is_block_proj() const { return this; } | |
64 virtual const RegMask &out_RegMask() const; | |
65 virtual uint ideal_reg() const { return NotAMachineReg; } | |
66 virtual uint match_edge(uint idx) const { return 0; } | |
67 }; | |
1972 | 68 |
69 #endif // SHARE_VM_OPTO_ROOTNODE_HPP |