Mercurial > hg > truffle
annotate src/share/vm/opto/multnode.hpp @ 196:d1605aabd0a1 jdk7-b30
6719955: Update copyright year
Summary: Update copyright year for files that have been modified in 2008
Reviewed-by: ohair, tbell
| author | xdono |
|---|---|
| date | Wed, 02 Jul 2008 12:55:16 -0700 |
| parents | 72f4a668df19 |
| children | c18cbe5936b8 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 196 | 2 * Copyright 1997-2008 Sun Microsystems, Inc. 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 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 class Matcher; | |
| 26 class ProjNode; | |
| 27 | |
| 28 //------------------------------MultiNode-------------------------------------- | |
| 29 // This class defines a MultiNode, a Node which produces many values. The | |
| 30 // values are wrapped up in a tuple Type, i.e. a TypeTuple. | |
| 31 class MultiNode : public Node { | |
| 32 public: | |
| 33 MultiNode( uint required ) : Node(required) { | |
| 34 init_class_id(Class_Multi); | |
| 35 } | |
| 36 virtual int Opcode() const; | |
| 37 virtual const Type *bottom_type() const = 0; | |
| 38 virtual bool is_CFG() const { return true; } | |
| 39 virtual uint hash() const { return NO_HASH; } // CFG nodes do not hash | |
| 40 virtual bool depends_only_on_test() const { return false; } | |
| 41 virtual const RegMask &out_RegMask() const; | |
| 42 virtual Node *match( const ProjNode *proj, const Matcher *m ); | |
| 43 virtual uint ideal_reg() const { return NotAMachineReg; } | |
| 44 ProjNode* proj_out(uint which_proj) const; // Get a named projection | |
| 45 | |
| 46 }; | |
| 47 | |
| 48 //------------------------------ProjNode--------------------------------------- | |
| 49 // This class defines a Projection node. Projections project a single element | |
| 50 // out of a tuple (or Signature) type. Only MultiNodes produce TypeTuple | |
| 51 // results. | |
| 52 class ProjNode : public Node { | |
| 53 protected: | |
| 54 virtual uint hash() const; | |
| 55 virtual uint cmp( const Node &n ) const; | |
| 56 virtual uint size_of() const; | |
| 57 void check_con() const; // Called from constructor. | |
| 58 | |
| 59 public: | |
| 60 ProjNode( Node *src, uint con, bool io_use = false ) | |
| 61 : Node( src ), _con(con), _is_io_use(io_use) | |
| 62 { | |
| 63 init_class_id(Class_Proj); | |
|
126
72f4a668df19
6625997: CastPP, CheckCastPP and Proj nodes are not dead loop safe
kvn
parents:
0
diff
changeset
|
64 // Optimistic setting. Need additional checks in Node::is_dead_loop_safe(). |
|
72f4a668df19
6625997: CastPP, CheckCastPP and Proj nodes are not dead loop safe
kvn
parents:
0
diff
changeset
|
65 if (con != TypeFunc::Memory || src->is_Start()) |
|
72f4a668df19
6625997: CastPP, CheckCastPP and Proj nodes are not dead loop safe
kvn
parents:
0
diff
changeset
|
66 init_flags(Flag_is_dead_loop_safe); |
| 0 | 67 debug_only(check_con()); |
| 68 } | |
| 69 const uint _con; // The field in the tuple we are projecting | |
| 70 const bool _is_io_use; // Used to distinguish between the projections | |
| 71 // used on the control and io paths from a macro node | |
| 72 virtual int Opcode() const; | |
| 73 virtual bool is_CFG() const; | |
| 74 virtual bool depends_only_on_test() const { return false; } | |
| 75 virtual const Type *bottom_type() const; | |
| 76 virtual const TypePtr *adr_type() const; | |
| 77 virtual bool pinned() const; | |
| 78 virtual const Type *Value( PhaseTransform *phase ) const; | |
| 79 virtual uint ideal_reg() const; | |
| 80 virtual const RegMask &out_RegMask() const; | |
| 81 #ifndef PRODUCT | |
| 82 virtual void dump_spec(outputStream *st) const; | |
| 83 #endif | |
| 84 }; |