1 /* 2 * Copyright (c) 1997, 2018, 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 assert((Opcode() != Op_If && Opcode() != Op_RangeCheck) || outcnt() == 2, "bad if #1"); 50 for( DUIterator_Fast imax, i = fast_outs(imax); i < imax; i++ ) { 51 Node *p = fast_out(i); 52 if (p->is_Proj()) { 53 ProjNode *proj = p->as_Proj(); 54 if (proj->_con == which_proj) { 55 assert((Opcode() != Op_If && Opcode() != Op_RangeCheck) || proj->Opcode() == (which_proj ? Op_IfTrue : Op_IfFalse), "bad if #2"); 56 return proj; 57 } 58 } else { 59 assert(p == this && this->is_Start(), "else must be proj"); 60 continue; 61 } 62 } 63 return NULL; 64 } 65 66 // Get a named projection 67 ProjNode* MultiNode::proj_out(uint which_proj) const { 68 ProjNode* p = proj_out_or_null(which_proj); 69 assert(p != NULL, "named projection %u not found", which_proj); 70 return p; 71 } 72 73 //============================================================================= 74 //------------------------------ProjNode--------------------------------------- 75 uint ProjNode::hash() const { 76 // only one input 77 return (uintptr_t)in(TypeFunc::Control) + (_con << 1) + (_is_io_use ? 1 : 0); 78 } 79 uint ProjNode::cmp( const Node &n ) const { return _con == ((ProjNode&)n)._con && ((ProjNode&)n)._is_io_use == _is_io_use; } 80 uint ProjNode::size_of() const { return sizeof(ProjNode); } 81 82 // Test if we propagate interesting control along this projection 83 bool ProjNode::is_CFG() const { 84 Node *def = in(0); 85 return (_con == TypeFunc::Control && def->is_CFG()); 86 } 87 88 const Type* ProjNode::proj_type(const Type* t) const { 89 if (t == Type::TOP) { 90 return Type::TOP; 91 } 92 if (t == Type::BOTTOM) { 93 return Type::BOTTOM; 94 } 95 t = t->is_tuple()->field_at(_con); 96 Node* n = in(0); 97 if ((_con == TypeFunc::Parms) && 98 n->is_CallStaticJava() && n->as_CallStaticJava()->is_boxing_method()) { 99 // The result of autoboxing is always non-null on normal path. 100 t = t->join_speculative(TypePtr::NOTNULL); 101 } 102 return t; 103 } 104 105 const Type *ProjNode::bottom_type() const { 106 if (in(0) == NULL) return Type::TOP; 107 return proj_type(in(0)->bottom_type()); 108 } 109 110 const TypePtr *ProjNode::adr_type() const { 111 if (bottom_type() == Type::MEMORY) { 112 // in(0) might be a narrow MemBar; otherwise we will report TypePtr::BOTTOM 113 Node* ctrl = in(0); 114 if (ctrl == NULL) return NULL; // node is dead 115 const TypePtr* adr_type = ctrl->adr_type(); 116 #ifdef ASSERT 117 if (!VMError::is_error_reported() && !Node::in_dump()) 118 assert(adr_type != NULL, "source must have adr_type"); 119 #endif 120 return adr_type; 121 } 122 assert(bottom_type()->base() != Type::Memory, "no other memories?"); 123 return NULL; 124 } 125 126 bool ProjNode::pinned() const { return in(0)->pinned(); } 127 #ifndef PRODUCT 128 void ProjNode::dump_spec(outputStream *st) const { st->print("#%d",_con); if(_is_io_use) st->print(" (i_o_use)");} 129 130 void ProjNode::dump_compact_spec(outputStream *st) const { 131 for (DUIterator i = this->outs(); this->has_out(i); i++) { 132 Node* o = this->out(i); 133 if (NotANode(o)) { 134 st->print("[?]"); 135 } else if (o == NULL) { 136 st->print("[_]"); 137 } else { 138 st->print("[%d]", o->_idx); 139 } 140 } 141 st->print("#%d", _con); 142 } 143 #endif 144 145 //----------------------------check_con---------------------------------------- 146 void ProjNode::check_con() const { 147 Node* n = in(0); 148 if (n == NULL) return; // should be assert, but NodeHash makes bogons 149 if (n->is_Mach()) return; // mach. projs. are not type-safe 150 if (n->is_Start()) return; // alas, starts can have mach. projs. also 151 if (_con == SCMemProjNode::SCMEMPROJCON ) return; 152 const Type* t = n->bottom_type(); 153 if (t == Type::TOP) return; // multi is dead 154 assert(_con < t->is_tuple()->cnt(), "ProjNode::_con must be in range"); 155 } 156 157 //------------------------------Value------------------------------------------ 158 const Type* ProjNode::Value(PhaseGVN* phase) const { 159 if (in(0) == NULL) return Type::TOP; 160 return proj_type(phase->type(in(0))); 161 } 162 163 //------------------------------out_RegMask------------------------------------ 164 // Pass the buck uphill 165 const RegMask &ProjNode::out_RegMask() const { 166 return RegMask::Empty; 167 } 168 169 //------------------------------ideal_reg-------------------------------------- 170 uint ProjNode::ideal_reg() const { 171 return bottom_type()->ideal_reg(); 172 } 173 174 //-------------------------------is_uncommon_trap_proj---------------------------- 175 // Return uncommon trap call node if proj is for "proj->[region->..]call_uct" 176 // NULL otherwise 177 CallStaticJavaNode* ProjNode::is_uncommon_trap_proj(Deoptimization::DeoptReason reason) { 178 int path_limit = 10; 179 Node* out = this; 180 for (int ct = 0; ct < path_limit; ct++) { 181 out = out->unique_ctrl_out(); 182 if (out == NULL) 183 return NULL; 184 if (out->is_CallStaticJava()) { 185 CallStaticJavaNode* call = out->as_CallStaticJava(); 186 int req = call->uncommon_trap_request(); 187 if (req != 0) { 188 Deoptimization::DeoptReason trap_reason = Deoptimization::trap_request_reason(req); 189 if (trap_reason == reason || reason == Deoptimization::Reason_none) { 190 return call; 191 } 192 } 193 return NULL; // don't do further after call 194 } 195 if (out->Opcode() != Op_Region) 196 return NULL; 197 } 198 return NULL; 199 } 200 201 //-------------------------------is_uncommon_trap_if_pattern------------------------- 202 // Return uncommon trap call node for "if(test)-> proj -> ... 203 // | 204 // V 205 // other_proj->[region->..]call_uct" 206 // NULL otherwise 207 // "must_reason_predicate" means the uct reason must be Reason_predicate 208 CallStaticJavaNode* ProjNode::is_uncommon_trap_if_pattern(Deoptimization::DeoptReason reason) { 209 Node *in0 = in(0); 210 if (!in0->is_If()) return NULL; 211 // Variation of a dead If node. 212 if (in0->outcnt() < 2) return NULL; 213 IfNode* iff = in0->as_If(); 214 215 // we need "If(Conv2B(Opaque1(...)))" pattern for reason_predicate 216 if (reason != Deoptimization::Reason_none) { 217 if (iff->in(1)->Opcode() != Op_Conv2B || 218 iff->in(1)->in(1)->Opcode() != Op_Opaque1) { 219 return NULL; 220 } 221 } 222 223 ProjNode* other_proj = iff->proj_out(1-_con); 224 CallStaticJavaNode* call = other_proj->is_uncommon_trap_proj(reason); 225 if (call != NULL) { 226 assert(reason == Deoptimization::Reason_none || 227 Compile::current()->is_predicate_opaq(iff->in(1)->in(1)), "should be on the list"); 228 return call; 229 } 230 return NULL; 231 } 232 233 ProjNode* ProjNode::other_if_proj() const { 234 assert(_con == 0 || _con == 1, "not an if?"); 235 return in(0)->as_If()->proj_out(1-_con); 236 }