Mercurial > hg > truffle
annotate src/share/vm/opto/multnode.cpp @ 2831:f072013daba9
Added lookup method.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Tue, 31 May 2011 11:32:48 +0200 |
parents | f95d63e2154a |
children | da91efe96a93 |
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 * | |
1552
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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 #include "precompiled.hpp" |
26 #include "opto/matcher.hpp" | |
27 #include "opto/multnode.hpp" | |
28 #include "opto/opcodes.hpp" | |
29 #include "opto/phaseX.hpp" | |
30 #include "opto/regmask.hpp" | |
31 #include "opto/type.hpp" | |
0 | 32 |
33 //============================================================================= | |
34 //------------------------------MultiNode-------------------------------------- | |
35 const RegMask &MultiNode::out_RegMask() const { | |
36 return RegMask::Empty; | |
37 } | |
38 | |
39 Node *MultiNode::match( const ProjNode *proj, const Matcher *m ) { return proj->clone(); } | |
40 | |
41 //------------------------------proj_out--------------------------------------- | |
42 // Get a named projection | |
43 ProjNode* MultiNode::proj_out(uint which_proj) const { | |
44 assert(Opcode() != Op_If || which_proj == (uint)true || which_proj == (uint)false, "must be 1 or 0"); | |
45 assert(Opcode() != Op_If || outcnt() == 2, "bad if #1"); | |
46 for( DUIterator_Fast imax, i = fast_outs(imax); i < imax; i++ ) { | |
47 Node *p = fast_out(i); | |
48 if( !p->is_Proj() ) { | |
49 assert(p == this && this->is_Start(), "else must be proj"); | |
50 continue; | |
51 } | |
52 ProjNode *proj = p->as_Proj(); | |
53 if( proj->_con == which_proj ) { | |
54 assert(Opcode() != Op_If || proj->Opcode() == (which_proj?Op_IfTrue:Op_IfFalse), "bad if #2"); | |
55 return proj; | |
56 } | |
57 } | |
58 return NULL; | |
59 } | |
60 | |
61 //============================================================================= | |
62 //------------------------------ProjNode--------------------------------------- | |
63 uint ProjNode::hash() const { | |
64 // only one input | |
65 return (uintptr_t)in(TypeFunc::Control) + (_con << 1) + (_is_io_use ? 1 : 0); | |
66 } | |
67 uint ProjNode::cmp( const Node &n ) const { return _con == ((ProjNode&)n)._con && ((ProjNode&)n)._is_io_use == _is_io_use; } | |
68 uint ProjNode::size_of() const { return sizeof(ProjNode); } | |
69 | |
70 // Test if we propagate interesting control along this projection | |
71 bool ProjNode::is_CFG() const { | |
72 Node *def = in(0); | |
73 return (_con == TypeFunc::Control && def->is_CFG()); | |
74 } | |
75 | |
76 const Type *ProjNode::bottom_type() const { | |
77 if (in(0) == NULL) return Type::TOP; | |
78 const Type *tb = in(0)->bottom_type(); | |
79 if( tb == Type::TOP ) return Type::TOP; | |
80 if( tb == Type::BOTTOM ) return Type::BOTTOM; | |
81 const TypeTuple *t = tb->is_tuple(); | |
82 return t->field_at(_con); | |
83 } | |
84 | |
85 const TypePtr *ProjNode::adr_type() const { | |
86 if (bottom_type() == Type::MEMORY) { | |
87 // in(0) might be a narrow MemBar; otherwise we will report TypePtr::BOTTOM | |
88 const TypePtr* adr_type = in(0)->adr_type(); | |
89 #ifdef ASSERT | |
90 if (!is_error_reported() && !Node::in_dump()) | |
91 assert(adr_type != NULL, "source must have adr_type"); | |
92 #endif | |
93 return adr_type; | |
94 } | |
95 assert(bottom_type()->base() != Type::Memory, "no other memories?"); | |
96 return NULL; | |
97 } | |
98 | |
99 bool ProjNode::pinned() const { return in(0)->pinned(); } | |
100 #ifndef PRODUCT | |
101 void ProjNode::dump_spec(outputStream *st) const { st->print("#%d",_con); if(_is_io_use) st->print(" (i_o_use)");} | |
102 #endif | |
103 | |
104 //----------------------------check_con---------------------------------------- | |
105 void ProjNode::check_con() const { | |
106 Node* n = in(0); | |
107 if (n == NULL) return; // should be assert, but NodeHash makes bogons | |
108 if (n->is_Mach()) return; // mach. projs. are not type-safe | |
109 if (n->is_Start()) return; // alas, starts can have mach. projs. also | |
110 if (_con == SCMemProjNode::SCMEMPROJCON ) return; | |
111 const Type* t = n->bottom_type(); | |
112 if (t == Type::TOP) return; // multi is dead | |
113 assert(_con < t->is_tuple()->cnt(), "ProjNode::_con must be in range"); | |
114 } | |
115 | |
116 //------------------------------Value------------------------------------------ | |
117 const Type *ProjNode::Value( PhaseTransform *phase ) const { | |
118 if( !in(0) ) return Type::TOP; | |
119 const Type *t = phase->type(in(0)); | |
120 if( t == Type::TOP ) return t; | |
121 if( t == Type::BOTTOM ) return t; | |
122 return t->is_tuple()->field_at(_con); | |
123 } | |
124 | |
125 //------------------------------out_RegMask------------------------------------ | |
126 // Pass the buck uphill | |
127 const RegMask &ProjNode::out_RegMask() const { | |
128 return RegMask::Empty; | |
129 } | |
130 | |
131 //------------------------------ideal_reg-------------------------------------- | |
132 uint ProjNode::ideal_reg() const { | |
133 return Matcher::base2reg[bottom_type()->base()]; | |
134 } |