Mercurial > hg > truffle
annotate src/share/vm/opto/multnode.cpp @ 14397:53fa76359eb1
8016696: PPC64 (part 4): add relocation for trampoline stubs
Summary: A trampoline allows to encode a small branch in the code, even if there is the chance that this branch can not reach all possible code locations. If the relocation finds that a branch is too far for the instruction in the code, it can patch it to jump to the trampoline where is sufficient space for a far branch. Needed on PPC.
Reviewed-by: kvn, bdelsart, jrose
author | goetz |
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date | Thu, 04 Jul 2013 10:51:31 +0200 |
parents | 6f3fd5150b67 |
children | c9ccd7b85f20 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2012, 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 #include "precompiled.hpp" |
10278 | 26 #include "opto/callnode.hpp" |
1972 | 27 #include "opto/matcher.hpp" |
28 #include "opto/multnode.hpp" | |
29 #include "opto/opcodes.hpp" | |
30 #include "opto/phaseX.hpp" | |
31 #include "opto/regmask.hpp" | |
32 #include "opto/type.hpp" | |
0 | 33 |
34 //============================================================================= | |
35 //------------------------------MultiNode-------------------------------------- | |
36 const RegMask &MultiNode::out_RegMask() const { | |
37 return RegMask::Empty; | |
38 } | |
39 | |
40 Node *MultiNode::match( const ProjNode *proj, const Matcher *m ) { return proj->clone(); } | |
41 | |
42 //------------------------------proj_out--------------------------------------- | |
43 // Get a named projection | |
44 ProjNode* MultiNode::proj_out(uint which_proj) const { | |
45 assert(Opcode() != Op_If || which_proj == (uint)true || which_proj == (uint)false, "must be 1 or 0"); | |
46 assert(Opcode() != Op_If || outcnt() == 2, "bad if #1"); | |
47 for( DUIterator_Fast imax, i = fast_outs(imax); i < imax; i++ ) { | |
48 Node *p = fast_out(i); | |
49 if( !p->is_Proj() ) { | |
50 assert(p == this && this->is_Start(), "else must be proj"); | |
51 continue; | |
52 } | |
53 ProjNode *proj = p->as_Proj(); | |
54 if( proj->_con == which_proj ) { | |
55 assert(Opcode() != Op_If || proj->Opcode() == (which_proj?Op_IfTrue:Op_IfFalse), "bad if #2"); | |
56 return proj; | |
57 } | |
58 } | |
59 return NULL; | |
60 } | |
61 | |
62 //============================================================================= | |
63 //------------------------------ProjNode--------------------------------------- | |
64 uint ProjNode::hash() const { | |
65 // only one input | |
66 return (uintptr_t)in(TypeFunc::Control) + (_con << 1) + (_is_io_use ? 1 : 0); | |
67 } | |
68 uint ProjNode::cmp( const Node &n ) const { return _con == ((ProjNode&)n)._con && ((ProjNode&)n)._is_io_use == _is_io_use; } | |
69 uint ProjNode::size_of() const { return sizeof(ProjNode); } | |
70 | |
71 // Test if we propagate interesting control along this projection | |
72 bool ProjNode::is_CFG() const { | |
73 Node *def = in(0); | |
74 return (_con == TypeFunc::Control && def->is_CFG()); | |
75 } | |
76 | |
10278 | 77 const Type* ProjNode::proj_type(const Type* t) const { |
78 if (t == Type::TOP) { | |
79 return Type::TOP; | |
80 } | |
81 if (t == Type::BOTTOM) { | |
82 return Type::BOTTOM; | |
83 } | |
84 t = t->is_tuple()->field_at(_con); | |
85 Node* n = in(0); | |
86 if ((_con == TypeFunc::Parms) && | |
87 n->is_CallStaticJava() && n->as_CallStaticJava()->is_boxing_method()) { | |
88 // The result of autoboxing is always non-null on normal path. | |
89 t = t->join(TypePtr::NOTNULL); | |
90 } | |
91 return t; | |
92 } | |
93 | |
0 | 94 const Type *ProjNode::bottom_type() const { |
10278 | 95 if (in(0) == NULL) return Type::TOP; |
96 return proj_type(in(0)->bottom_type()); | |
0 | 97 } |
98 | |
99 const TypePtr *ProjNode::adr_type() const { | |
100 if (bottom_type() == Type::MEMORY) { | |
101 // in(0) might be a narrow MemBar; otherwise we will report TypePtr::BOTTOM | |
102 const TypePtr* adr_type = in(0)->adr_type(); | |
103 #ifdef ASSERT | |
104 if (!is_error_reported() && !Node::in_dump()) | |
105 assert(adr_type != NULL, "source must have adr_type"); | |
106 #endif | |
107 return adr_type; | |
108 } | |
109 assert(bottom_type()->base() != Type::Memory, "no other memories?"); | |
110 return NULL; | |
111 } | |
112 | |
113 bool ProjNode::pinned() const { return in(0)->pinned(); } | |
114 #ifndef PRODUCT | |
115 void ProjNode::dump_spec(outputStream *st) const { st->print("#%d",_con); if(_is_io_use) st->print(" (i_o_use)");} | |
116 #endif | |
117 | |
118 //----------------------------check_con---------------------------------------- | |
119 void ProjNode::check_con() const { | |
120 Node* n = in(0); | |
121 if (n == NULL) return; // should be assert, but NodeHash makes bogons | |
122 if (n->is_Mach()) return; // mach. projs. are not type-safe | |
123 if (n->is_Start()) return; // alas, starts can have mach. projs. also | |
124 if (_con == SCMemProjNode::SCMEMPROJCON ) return; | |
125 const Type* t = n->bottom_type(); | |
126 if (t == Type::TOP) return; // multi is dead | |
127 assert(_con < t->is_tuple()->cnt(), "ProjNode::_con must be in range"); | |
128 } | |
129 | |
130 //------------------------------Value------------------------------------------ | |
131 const Type *ProjNode::Value( PhaseTransform *phase ) const { | |
10278 | 132 if (in(0) == NULL) return Type::TOP; |
133 return proj_type(phase->type(in(0))); | |
0 | 134 } |
135 | |
136 //------------------------------out_RegMask------------------------------------ | |
137 // Pass the buck uphill | |
138 const RegMask &ProjNode::out_RegMask() const { | |
139 return RegMask::Empty; | |
140 } | |
141 | |
142 //------------------------------ideal_reg-------------------------------------- | |
143 uint ProjNode::ideal_reg() const { | |
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144 return bottom_type()->ideal_reg(); |
0 | 145 } |