jdk

Форк
0
/
multnode.cpp 
229 строк · 8.2 Кб
1
/*
2
 * Copyright (c) 1997, 2023, Oracle and/or its affiliates. All rights reserved.
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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20
 * or visit www.oracle.com if you need additional information or have any
21
 * questions.
22
 *
23
 */
24

25
#include "precompiled.hpp"
26
#include "opto/callnode.hpp"
27
#include "opto/cfgnode.hpp"
28
#include "opto/matcher.hpp"
29
#include "opto/mathexactnode.hpp"
30
#include "opto/multnode.hpp"
31
#include "opto/opcodes.hpp"
32
#include "opto/phaseX.hpp"
33
#include "opto/regmask.hpp"
34
#include "opto/type.hpp"
35
#include "utilities/vmError.hpp"
36

37
//=============================================================================
38
//------------------------------MultiNode--------------------------------------
39
const RegMask &MultiNode::out_RegMask() const {
40
  return RegMask::Empty;
41
}
42

43
Node *MultiNode::match( const ProjNode *proj, const Matcher *m ) { return proj->clone(); }
44

45
//------------------------------proj_out---------------------------------------
46
// Get a named projection or null if not found
47
ProjNode* MultiNode::proj_out_or_null(uint which_proj) const {
48
  assert((Opcode() != Op_If && Opcode() != Op_RangeCheck) || which_proj == (uint)true || which_proj == (uint)false, "must be 1 or 0");
49
  for( DUIterator_Fast imax, i = fast_outs(imax); i < imax; i++ ) {
50
    Node *p = fast_out(i);
51
    if (p->is_Proj()) {
52
      ProjNode *proj = p->as_Proj();
53
      if (proj->_con == which_proj) {
54
        assert((Opcode() != Op_If && Opcode() != Op_RangeCheck) || proj->Opcode() == (which_proj ? Op_IfTrue : Op_IfFalse), "bad if #2");
55
        return proj;
56
      }
57
    } else {
58
      assert(p == this && this->is_Start(), "else must be proj");
59
      continue;
60
    }
61
  }
62
  return nullptr;
63
}
64

65
ProjNode* MultiNode::proj_out_or_null(uint which_proj, bool is_io_use) const {
66
  for (DUIterator_Fast imax, i = fast_outs(imax); i < imax; i++) {
67
    ProjNode* proj = fast_out(i)->isa_Proj();
68
    if (proj != nullptr && (proj->_con == which_proj) && (proj->_is_io_use == is_io_use)) {
69
      return proj;
70
    }
71
  }
72
  return nullptr;
73
}
74

75
// Get a named projection
76
ProjNode* MultiNode::proj_out(uint which_proj) const {
77
  assert((Opcode() != Op_If && Opcode() != Op_RangeCheck) || outcnt() == 2, "bad if #1");
78
  ProjNode* p = proj_out_or_null(which_proj);
79
  assert(p != nullptr, "named projection %u not found", which_proj);
80
  return p;
81
}
82

83
//=============================================================================
84
//------------------------------ProjNode---------------------------------------
85
uint ProjNode::hash() const {
86
  // only one input
87
  return (uintptr_t)in(TypeFunc::Control) + (_con << 1) + (_is_io_use ? 1 : 0);
88
}
89
bool ProjNode::cmp( const Node &n ) const { return _con == ((ProjNode&)n)._con && ((ProjNode&)n)._is_io_use == _is_io_use; }
90
uint ProjNode::size_of() const { return sizeof(ProjNode); }
91

92
// Test if we propagate interesting control along this projection
93
bool ProjNode::is_CFG() const {
94
  Node *def = in(0);
95
  return (_con == TypeFunc::Control && def->is_CFG());
96
}
97

98
const Type* ProjNode::proj_type(const Type* t) const {
99
  if (t == Type::TOP) {
100
    return Type::TOP;
101
  }
102
  if (t == Type::BOTTOM) {
103
    return Type::BOTTOM;
104
  }
105
  t = t->is_tuple()->field_at(_con);
106
  Node* n = in(0);
107
  if ((_con == TypeFunc::Parms) &&
108
      n->is_CallStaticJava() && n->as_CallStaticJava()->is_boxing_method()) {
109
    // The result of autoboxing is always non-null on normal path.
110
    t = t->join_speculative(TypePtr::NOTNULL);
111
  }
112
  return t;
113
}
114

115
const Type *ProjNode::bottom_type() const {
116
  if (in(0) == nullptr) return Type::TOP;
117
  return proj_type(in(0)->bottom_type());
118
}
119

120
const TypePtr *ProjNode::adr_type() const {
121
  if (bottom_type() == Type::MEMORY) {
122
    // in(0) might be a narrow MemBar; otherwise we will report TypePtr::BOTTOM
123
    Node* ctrl = in(0);
124
    if (ctrl == nullptr)  return nullptr; // node is dead
125
    const TypePtr* adr_type = ctrl->adr_type();
126
    #ifdef ASSERT
127
    if (!VMError::is_error_reported() && !Node::in_dump())
128
      assert(adr_type != nullptr, "source must have adr_type");
129
    #endif
130
    return adr_type;
131
  }
132
  assert(bottom_type()->base() != Type::Memory, "no other memories?");
133
  return nullptr;
134
}
135

136
bool ProjNode::pinned() const { return in(0)->pinned(); }
137
#ifndef PRODUCT
138
void ProjNode::dump_spec(outputStream *st) const { st->print("#%d",_con); if(_is_io_use) st->print(" (i_o_use)");}
139

140
void ProjNode::dump_compact_spec(outputStream *st) const {
141
  for (DUIterator i = this->outs(); this->has_out(i); i++) {
142
    Node* o = this->out(i);
143
    if (not_a_node(o)) {
144
      st->print("[?]");
145
    } else if (o == nullptr) {
146
      st->print("[_]");
147
    } else {
148
      st->print("[%d]", o->_idx);
149
    }
150
  }
151
  st->print("#%d", _con);
152
}
153
#endif
154

155
//----------------------------check_con----------------------------------------
156
void ProjNode::check_con() const {
157
  Node* n = in(0);
158
  if (n == nullptr)    return;  // should be assert, but NodeHash makes bogons
159
  if (n->is_Mach())    return;  // mach. projs. are not type-safe
160
  if (n->is_Start())   return;  // alas, starts can have mach. projs. also
161
  if (_con == SCMemProjNode::SCMEMPROJCON ) return;
162
  const Type* t = n->bottom_type();
163
  if (t == Type::TOP)  return;  // multi is dead
164
  assert(_con < t->is_tuple()->cnt(), "ProjNode::_con must be in range");
165
}
166

167
//------------------------------Value------------------------------------------
168
const Type* ProjNode::Value(PhaseGVN* phase) const {
169
  if (in(0) == nullptr) return Type::TOP;
170
  return proj_type(phase->type(in(0)));
171
}
172

173
//------------------------------out_RegMask------------------------------------
174
// Pass the buck uphill
175
const RegMask &ProjNode::out_RegMask() const {
176
  return RegMask::Empty;
177
}
178

179
//------------------------------ideal_reg--------------------------------------
180
uint ProjNode::ideal_reg() const {
181
  return bottom_type()->ideal_reg();
182
}
183

184
//-------------------------------is_uncommon_trap_proj----------------------------
185
// Return uncommon trap call node if proj is for "proj->[region->..]call_uct"
186
// null otherwise
187
CallStaticJavaNode* ProjNode::is_uncommon_trap_proj(Deoptimization::DeoptReason reason) const {
188
  const int path_limit = 10;
189
  const Node* out = this;
190
  for (int ct = 0; ct < path_limit; ct++) {
191
    out = out->unique_ctrl_out_or_null();
192
    if (out == nullptr)
193
      return nullptr;
194
    if (out->is_CallStaticJava()) {
195
      CallStaticJavaNode* call = out->as_CallStaticJava();
196
      int req = call->uncommon_trap_request();
197
      if (req != 0) {
198
        Deoptimization::DeoptReason trap_reason = Deoptimization::trap_request_reason(req);
199
        if (trap_reason == reason || reason == Deoptimization::Reason_none) {
200
          return call;
201
        }
202
      }
203
      return nullptr; // don't do further after call
204
    }
205
    if (out->Opcode() != Op_Region)
206
      return nullptr;
207
  }
208
  return nullptr;
209
}
210

211
//-------------------------------is_uncommon_trap_if_pattern-------------------------
212
// Return uncommon trap call node for    "if(test)-> proj -> ...
213
//                                                 |
214
//                                                 V
215
//                                             other_proj->[region->..]call_uct"
216
// or null otherwise.
217
CallStaticJavaNode* ProjNode::is_uncommon_trap_if_pattern(Deoptimization::DeoptReason reason) const {
218
  Node* iff = in(0);
219
  if (!iff->is_If() || iff->outcnt() < 2) {
220
    // Not a projection of an If or variation of a dead If node.
221
    return nullptr;
222
  }
223
  return other_if_proj()->is_uncommon_trap_proj(reason);
224
}
225

226
ProjNode* ProjNode::other_if_proj() const {
227
  assert(_con == 0 || _con == 1, "not an if?");
228
  return in(0)->as_If()->proj_out(1-_con);
229
}
230

Использование cookies

Мы используем файлы cookie в соответствии с Политикой конфиденциальности и Политикой использования cookies.

Нажимая кнопку «Принимаю», Вы даете АО «СберТех» согласие на обработку Ваших персональных данных в целях совершенствования нашего веб-сайта и Сервиса GitVerse, а также повышения удобства их использования.

Запретить использование cookies Вы можете самостоятельно в настройках Вашего браузера.