Mercurial > hg > truffle
annotate src/share/vm/opto/memnode.hpp @ 6842:b9a9ed0f8eeb
7197424: update copyright year to match last edit in jdk8 hotspot repository
Summary: Update copyright year to 2012 for relevant files
Reviewed-by: dholmes, coleenp
| author | mikael |
|---|---|
| date | Tue, 09 Oct 2012 10:09:34 -0700 |
| parents | 7eca5de9e0b6 |
| children | d804e148cff8 |
| rev | line source |
|---|---|
| 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 #ifndef SHARE_VM_OPTO_MEMNODE_HPP |
| 26 #define SHARE_VM_OPTO_MEMNODE_HPP | |
| 27 | |
| 28 #include "opto/multnode.hpp" | |
| 29 #include "opto/node.hpp" | |
| 30 #include "opto/opcodes.hpp" | |
| 31 #include "opto/type.hpp" | |
| 32 | |
| 0 | 33 // Portions of code courtesy of Clifford Click |
| 34 | |
| 35 class MultiNode; | |
| 36 class PhaseCCP; | |
| 37 class PhaseTransform; | |
| 38 | |
| 39 //------------------------------MemNode---------------------------------------- | |
| 40 // Load or Store, possibly throwing a NULL pointer exception | |
| 41 class MemNode : public Node { | |
| 42 protected: | |
| 43 #ifdef ASSERT | |
| 44 const TypePtr* _adr_type; // What kind of memory is being addressed? | |
| 45 #endif | |
| 46 virtual uint size_of() const; // Size is bigger (ASSERT only) | |
| 47 public: | |
| 48 enum { Control, // When is it safe to do this load? | |
| 49 Memory, // Chunk of memory is being loaded from | |
| 50 Address, // Actually address, derived from base | |
| 51 ValueIn, // Value to store | |
| 52 OopStore // Preceeding oop store, only in StoreCM | |
| 53 }; | |
| 54 protected: | |
| 55 MemNode( Node *c0, Node *c1, Node *c2, const TypePtr* at ) | |
| 56 : Node(c0,c1,c2 ) { | |
| 57 init_class_id(Class_Mem); | |
| 58 debug_only(_adr_type=at; adr_type();) | |
| 59 } | |
| 60 MemNode( Node *c0, Node *c1, Node *c2, const TypePtr* at, Node *c3 ) | |
| 61 : Node(c0,c1,c2,c3) { | |
| 62 init_class_id(Class_Mem); | |
| 63 debug_only(_adr_type=at; adr_type();) | |
| 64 } | |
| 65 MemNode( Node *c0, Node *c1, Node *c2, const TypePtr* at, Node *c3, Node *c4) | |
| 66 : Node(c0,c1,c2,c3,c4) { | |
| 67 init_class_id(Class_Mem); | |
| 68 debug_only(_adr_type=at; adr_type();) | |
| 69 } | |
| 70 | |
| 33 | 71 public: |
| 0 | 72 // Helpers for the optimizer. Documented in memnode.cpp. |
| 73 static bool detect_ptr_independence(Node* p1, AllocateNode* a1, | |
| 74 Node* p2, AllocateNode* a2, | |
| 75 PhaseTransform* phase); | |
| 76 static bool adr_phi_is_loop_invariant(Node* adr_phi, Node* cast); | |
| 77 | |
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78 static Node *optimize_simple_memory_chain(Node *mchain, const TypePtr *t_adr, PhaseGVN *phase); |
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79 static Node *optimize_memory_chain(Node *mchain, const TypePtr *t_adr, PhaseGVN *phase); |
| 0 | 80 // This one should probably be a phase-specific function: |
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81 static bool all_controls_dominate(Node* dom, Node* sub); |
| 0 | 82 |
| 163 | 83 // Find any cast-away of null-ness and keep its control. |
| 84 static Node *Ideal_common_DU_postCCP( PhaseCCP *ccp, Node* n, Node* adr ); | |
| 0 | 85 virtual Node *Ideal_DU_postCCP( PhaseCCP *ccp ); |
| 86 | |
| 87 virtual const class TypePtr *adr_type() const; // returns bottom_type of address | |
| 88 | |
| 89 // Shared code for Ideal methods: | |
| 90 Node *Ideal_common(PhaseGVN *phase, bool can_reshape); // Return -1 for short-circuit NULL. | |
| 91 | |
| 92 // Helper function for adr_type() implementations. | |
| 93 static const TypePtr* calculate_adr_type(const Type* t, const TypePtr* cross_check = NULL); | |
| 94 | |
| 95 // Raw access function, to allow copying of adr_type efficiently in | |
| 96 // product builds and retain the debug info for debug builds. | |
| 97 const TypePtr *raw_adr_type() const { | |
| 98 #ifdef ASSERT | |
| 99 return _adr_type; | |
| 100 #else | |
| 101 return 0; | |
| 102 #endif | |
| 103 } | |
| 104 | |
| 105 // Map a load or store opcode to its corresponding store opcode. | |
| 106 // (Return -1 if unknown.) | |
| 107 virtual int store_Opcode() const { return -1; } | |
| 108 | |
| 109 // What is the type of the value in memory? (T_VOID mean "unspecified".) | |
| 110 virtual BasicType memory_type() const = 0; | |
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111 virtual int memory_size() const { |
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112 #ifdef ASSERT |
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113 return type2aelembytes(memory_type(), true); |
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114 #else |
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115 return type2aelembytes(memory_type()); |
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116 #endif |
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117 } |
| 0 | 118 |
| 119 // Search through memory states which precede this node (load or store). | |
| 120 // Look for an exact match for the address, with no intervening | |
| 121 // aliased stores. | |
| 122 Node* find_previous_store(PhaseTransform* phase); | |
| 123 | |
| 124 // Can this node (load or store) accurately see a stored value in | |
| 125 // the given memory state? (The state may or may not be in(Memory).) | |
| 126 Node* can_see_stored_value(Node* st, PhaseTransform* phase) const; | |
| 127 | |
| 128 #ifndef PRODUCT | |
| 129 static void dump_adr_type(const Node* mem, const TypePtr* adr_type, outputStream *st); | |
| 130 virtual void dump_spec(outputStream *st) const; | |
| 131 #endif | |
| 132 }; | |
| 133 | |
| 134 //------------------------------LoadNode--------------------------------------- | |
| 135 // Load value; requires Memory and Address | |
| 136 class LoadNode : public MemNode { | |
| 137 protected: | |
| 138 virtual uint cmp( const Node &n ) const; | |
| 139 virtual uint size_of() const; // Size is bigger | |
| 140 const Type* const _type; // What kind of value is loaded? | |
| 141 public: | |
| 142 | |
| 143 LoadNode( Node *c, Node *mem, Node *adr, const TypePtr* at, const Type *rt ) | |
| 144 : MemNode(c,mem,adr,at), _type(rt) { | |
| 145 init_class_id(Class_Load); | |
| 146 } | |
| 147 | |
| 148 // Polymorphic factory method: | |
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149 static Node* make( PhaseGVN& gvn, Node *c, Node *mem, Node *adr, |
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150 const TypePtr* at, const Type *rt, BasicType bt ); |
| 0 | 151 |
| 152 virtual uint hash() const; // Check the type | |
| 153 | |
| 154 // Handle algebraic identities here. If we have an identity, return the Node | |
| 155 // we are equivalent to. We look for Load of a Store. | |
| 156 virtual Node *Identity( PhaseTransform *phase ); | |
| 157 | |
| 158 // If the load is from Field memory and the pointer is non-null, we can | |
| 159 // zero out the control input. | |
| 160 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
| 161 | |
| 163 | 162 // Split instance field load through Phi. |
| 163 Node* split_through_phi(PhaseGVN *phase); | |
| 164 | |
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165 // Recover original value from boxed values |
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166 Node *eliminate_autobox(PhaseGVN *phase); |
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167 |
| 0 | 168 // Compute a new Type for this node. Basically we just do the pre-check, |
| 169 // then call the virtual add() to set the type. | |
| 170 virtual const Type *Value( PhaseTransform *phase ) const; | |
| 171 | |
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172 // Common methods for LoadKlass and LoadNKlass nodes. |
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173 const Type *klass_value_common( PhaseTransform *phase ) const; |
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174 Node *klass_identity_common( PhaseTransform *phase ); |
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175 |
| 0 | 176 virtual uint ideal_reg() const; |
| 177 virtual const Type *bottom_type() const; | |
| 178 // Following method is copied from TypeNode: | |
| 179 void set_type(const Type* t) { | |
| 180 assert(t != NULL, "sanity"); | |
| 181 debug_only(uint check_hash = (VerifyHashTableKeys && _hash_lock) ? hash() : NO_HASH); | |
| 182 *(const Type**)&_type = t; // cast away const-ness | |
| 183 // If this node is in the hash table, make sure it doesn't need a rehash. | |
| 184 assert(check_hash == NO_HASH || check_hash == hash(), "type change must preserve hash code"); | |
| 185 } | |
| 186 const Type* type() const { assert(_type != NULL, "sanity"); return _type; }; | |
| 187 | |
| 188 // Do not match memory edge | |
| 189 virtual uint match_edge(uint idx) const; | |
| 190 | |
| 191 // Map a load opcode to its corresponding store opcode. | |
| 192 virtual int store_Opcode() const = 0; | |
| 193 | |
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194 // Check if the load's memory input is a Phi node with the same control. |
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195 bool is_instance_field_load_with_local_phi(Node* ctrl); |
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196 |
| 0 | 197 #ifndef PRODUCT |
| 198 virtual void dump_spec(outputStream *st) const; | |
| 199 #endif | |
| 1609 | 200 #ifdef ASSERT |
| 201 // Helper function to allow a raw load without control edge for some cases | |
| 202 static bool is_immutable_value(Node* adr); | |
| 203 #endif | |
| 0 | 204 protected: |
| 205 const Type* load_array_final_field(const TypeKlassPtr *tkls, | |
| 206 ciKlass* klass) const; | |
| 207 }; | |
| 208 | |
| 209 //------------------------------LoadBNode-------------------------------------- | |
| 210 // Load a byte (8bits signed) from memory | |
| 211 class LoadBNode : public LoadNode { | |
| 212 public: | |
| 213 LoadBNode( Node *c, Node *mem, Node *adr, const TypePtr* at, const TypeInt *ti = TypeInt::BYTE ) | |
| 214 : LoadNode(c,mem,adr,at,ti) {} | |
| 215 virtual int Opcode() const; | |
| 216 virtual uint ideal_reg() const { return Op_RegI; } | |
| 217 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
| 4815 | 218 virtual const Type *Value(PhaseTransform *phase) const; |
| 0 | 219 virtual int store_Opcode() const { return Op_StoreB; } |
| 220 virtual BasicType memory_type() const { return T_BYTE; } | |
| 221 }; | |
| 222 | |
| 624 | 223 //------------------------------LoadUBNode------------------------------------- |
| 224 // Load a unsigned byte (8bits unsigned) from memory | |
| 225 class LoadUBNode : public LoadNode { | |
| 226 public: | |
| 227 LoadUBNode(Node* c, Node* mem, Node* adr, const TypePtr* at, const TypeInt* ti = TypeInt::UBYTE ) | |
| 228 : LoadNode(c, mem, adr, at, ti) {} | |
| 229 virtual int Opcode() const; | |
| 230 virtual uint ideal_reg() const { return Op_RegI; } | |
| 231 virtual Node* Ideal(PhaseGVN *phase, bool can_reshape); | |
| 4815 | 232 virtual const Type *Value(PhaseTransform *phase) const; |
| 624 | 233 virtual int store_Opcode() const { return Op_StoreB; } |
| 234 virtual BasicType memory_type() const { return T_BYTE; } | |
| 235 }; | |
| 236 | |
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237 //------------------------------LoadUSNode------------------------------------- |
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238 // Load an unsigned short/char (16bits unsigned) from memory |
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239 class LoadUSNode : public LoadNode { |
| 0 | 240 public: |
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241 LoadUSNode( Node *c, Node *mem, Node *adr, const TypePtr* at, const TypeInt *ti = TypeInt::CHAR ) |
| 0 | 242 : LoadNode(c,mem,adr,at,ti) {} |
| 243 virtual int Opcode() const; | |
| 244 virtual uint ideal_reg() const { return Op_RegI; } | |
| 245 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
| 4815 | 246 virtual const Type *Value(PhaseTransform *phase) const; |
| 0 | 247 virtual int store_Opcode() const { return Op_StoreC; } |
| 248 virtual BasicType memory_type() const { return T_CHAR; } | |
| 249 }; | |
| 250 | |
| 4815 | 251 //------------------------------LoadSNode-------------------------------------- |
| 252 // Load a short (16bits signed) from memory | |
| 253 class LoadSNode : public LoadNode { | |
| 254 public: | |
| 255 LoadSNode( Node *c, Node *mem, Node *adr, const TypePtr* at, const TypeInt *ti = TypeInt::SHORT ) | |
| 256 : LoadNode(c,mem,adr,at,ti) {} | |
| 257 virtual int Opcode() const; | |
| 258 virtual uint ideal_reg() const { return Op_RegI; } | |
| 259 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
| 260 virtual const Type *Value(PhaseTransform *phase) const; | |
| 261 virtual int store_Opcode() const { return Op_StoreC; } | |
| 262 virtual BasicType memory_type() const { return T_SHORT; } | |
| 263 }; | |
| 264 | |
| 0 | 265 //------------------------------LoadINode-------------------------------------- |
| 266 // Load an integer from memory | |
| 267 class LoadINode : public LoadNode { | |
| 268 public: | |
| 269 LoadINode( Node *c, Node *mem, Node *adr, const TypePtr* at, const TypeInt *ti = TypeInt::INT ) | |
| 270 : LoadNode(c,mem,adr,at,ti) {} | |
| 271 virtual int Opcode() const; | |
| 272 virtual uint ideal_reg() const { return Op_RegI; } | |
| 273 virtual int store_Opcode() const { return Op_StoreI; } | |
| 274 virtual BasicType memory_type() const { return T_INT; } | |
| 275 }; | |
| 276 | |
| 624 | 277 //------------------------------LoadUI2LNode----------------------------------- |
| 278 // Load an unsigned integer into long from memory | |
| 279 class LoadUI2LNode : public LoadNode { | |
| 280 public: | |
| 281 LoadUI2LNode(Node* c, Node* mem, Node* adr, const TypePtr* at, const TypeLong* t = TypeLong::UINT) | |
| 282 : LoadNode(c, mem, adr, at, t) {} | |
| 283 virtual int Opcode() const; | |
| 284 virtual uint ideal_reg() const { return Op_RegL; } | |
| 285 virtual int store_Opcode() const { return Op_StoreL; } | |
| 286 virtual BasicType memory_type() const { return T_LONG; } | |
| 287 }; | |
| 288 | |
| 0 | 289 //------------------------------LoadRangeNode---------------------------------- |
| 290 // Load an array length from the array | |
| 291 class LoadRangeNode : public LoadINode { | |
| 292 public: | |
| 293 LoadRangeNode( Node *c, Node *mem, Node *adr, const TypeInt *ti = TypeInt::POS ) | |
| 294 : LoadINode(c,mem,adr,TypeAryPtr::RANGE,ti) {} | |
| 295 virtual int Opcode() const; | |
| 296 virtual const Type *Value( PhaseTransform *phase ) const; | |
| 297 virtual Node *Identity( PhaseTransform *phase ); | |
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298 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); |
| 0 | 299 }; |
| 300 | |
| 301 //------------------------------LoadLNode-------------------------------------- | |
| 302 // Load a long from memory | |
| 303 class LoadLNode : public LoadNode { | |
| 304 virtual uint hash() const { return LoadNode::hash() + _require_atomic_access; } | |
| 305 virtual uint cmp( const Node &n ) const { | |
| 306 return _require_atomic_access == ((LoadLNode&)n)._require_atomic_access | |
| 307 && LoadNode::cmp(n); | |
| 308 } | |
| 309 virtual uint size_of() const { return sizeof(*this); } | |
| 310 const bool _require_atomic_access; // is piecewise load forbidden? | |
| 311 | |
| 312 public: | |
| 313 LoadLNode( Node *c, Node *mem, Node *adr, const TypePtr* at, | |
| 314 const TypeLong *tl = TypeLong::LONG, | |
| 315 bool require_atomic_access = false ) | |
| 316 : LoadNode(c,mem,adr,at,tl) | |
| 317 , _require_atomic_access(require_atomic_access) | |
| 318 {} | |
| 319 virtual int Opcode() const; | |
| 320 virtual uint ideal_reg() const { return Op_RegL; } | |
| 321 virtual int store_Opcode() const { return Op_StoreL; } | |
| 322 virtual BasicType memory_type() const { return T_LONG; } | |
| 323 bool require_atomic_access() { return _require_atomic_access; } | |
| 324 static LoadLNode* make_atomic(Compile *C, Node* ctl, Node* mem, Node* adr, const TypePtr* adr_type, const Type* rt); | |
| 325 #ifndef PRODUCT | |
| 326 virtual void dump_spec(outputStream *st) const { | |
| 327 LoadNode::dump_spec(st); | |
| 328 if (_require_atomic_access) st->print(" Atomic!"); | |
| 329 } | |
| 330 #endif | |
| 331 }; | |
| 332 | |
| 333 //------------------------------LoadL_unalignedNode---------------------------- | |
| 334 // Load a long from unaligned memory | |
| 335 class LoadL_unalignedNode : public LoadLNode { | |
| 336 public: | |
| 337 LoadL_unalignedNode( Node *c, Node *mem, Node *adr, const TypePtr* at ) | |
| 338 : LoadLNode(c,mem,adr,at) {} | |
| 339 virtual int Opcode() const; | |
| 340 }; | |
| 341 | |
| 342 //------------------------------LoadFNode-------------------------------------- | |
| 343 // Load a float (64 bits) from memory | |
| 344 class LoadFNode : public LoadNode { | |
| 345 public: | |
| 346 LoadFNode( Node *c, Node *mem, Node *adr, const TypePtr* at, const Type *t = Type::FLOAT ) | |
| 347 : LoadNode(c,mem,adr,at,t) {} | |
| 348 virtual int Opcode() const; | |
| 349 virtual uint ideal_reg() const { return Op_RegF; } | |
| 350 virtual int store_Opcode() const { return Op_StoreF; } | |
| 351 virtual BasicType memory_type() const { return T_FLOAT; } | |
| 352 }; | |
| 353 | |
| 354 //------------------------------LoadDNode-------------------------------------- | |
| 355 // Load a double (64 bits) from memory | |
| 356 class LoadDNode : public LoadNode { | |
| 357 public: | |
| 358 LoadDNode( Node *c, Node *mem, Node *adr, const TypePtr* at, const Type *t = Type::DOUBLE ) | |
| 359 : LoadNode(c,mem,adr,at,t) {} | |
| 360 virtual int Opcode() const; | |
| 361 virtual uint ideal_reg() const { return Op_RegD; } | |
| 362 virtual int store_Opcode() const { return Op_StoreD; } | |
| 363 virtual BasicType memory_type() const { return T_DOUBLE; } | |
| 364 }; | |
| 365 | |
| 366 //------------------------------LoadD_unalignedNode---------------------------- | |
| 367 // Load a double from unaligned memory | |
| 368 class LoadD_unalignedNode : public LoadDNode { | |
| 369 public: | |
| 370 LoadD_unalignedNode( Node *c, Node *mem, Node *adr, const TypePtr* at ) | |
| 371 : LoadDNode(c,mem,adr,at) {} | |
| 372 virtual int Opcode() const; | |
| 373 }; | |
| 374 | |
| 375 //------------------------------LoadPNode-------------------------------------- | |
| 376 // Load a pointer from memory (either object or array) | |
| 377 class LoadPNode : public LoadNode { | |
| 378 public: | |
| 379 LoadPNode( Node *c, Node *mem, Node *adr, const TypePtr *at, const TypePtr* t ) | |
| 380 : LoadNode(c,mem,adr,at,t) {} | |
| 381 virtual int Opcode() const; | |
| 382 virtual uint ideal_reg() const { return Op_RegP; } | |
| 383 virtual int store_Opcode() const { return Op_StoreP; } | |
| 384 virtual BasicType memory_type() const { return T_ADDRESS; } | |
| 385 // depends_only_on_test is almost always true, and needs to be almost always | |
| 386 // true to enable key hoisting & commoning optimizations. However, for the | |
| 387 // special case of RawPtr loads from TLS top & end, the control edge carries | |
| 388 // the dependence preventing hoisting past a Safepoint instead of the memory | |
| 389 // edge. (An unfortunate consequence of having Safepoints not set Raw | |
| 390 // Memory; itself an unfortunate consequence of having Nodes which produce | |
| 391 // results (new raw memory state) inside of loops preventing all manner of | |
| 392 // other optimizations). Basically, it's ugly but so is the alternative. | |
| 393 // See comment in macro.cpp, around line 125 expand_allocate_common(). | |
| 394 virtual bool depends_only_on_test() const { return adr_type() != TypeRawPtr::BOTTOM; } | |
| 395 }; | |
| 396 | |
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397 |
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398 //------------------------------LoadNNode-------------------------------------- |
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399 // Load a narrow oop from memory (either object or array) |
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400 class LoadNNode : public LoadNode { |
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401 public: |
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402 LoadNNode( Node *c, Node *mem, Node *adr, const TypePtr *at, const Type* t ) |
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403 : LoadNode(c,mem,adr,at,t) {} |
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404 virtual int Opcode() const; |
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405 virtual uint ideal_reg() const { return Op_RegN; } |
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406 virtual int store_Opcode() const { return Op_StoreN; } |
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407 virtual BasicType memory_type() const { return T_NARROWOOP; } |
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408 // depends_only_on_test is almost always true, and needs to be almost always |
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409 // true to enable key hoisting & commoning optimizations. However, for the |
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410 // special case of RawPtr loads from TLS top & end, the control edge carries |
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411 // the dependence preventing hoisting past a Safepoint instead of the memory |
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412 // edge. (An unfortunate consequence of having Safepoints not set Raw |
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413 // Memory; itself an unfortunate consequence of having Nodes which produce |
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414 // results (new raw memory state) inside of loops preventing all manner of |
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415 // other optimizations). Basically, it's ugly but so is the alternative. |
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416 // See comment in macro.cpp, around line 125 expand_allocate_common(). |
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417 virtual bool depends_only_on_test() const { return adr_type() != TypeRawPtr::BOTTOM; } |
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418 }; |
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419 |
| 0 | 420 //------------------------------LoadKlassNode---------------------------------- |
| 421 // Load a Klass from an object | |
| 422 class LoadKlassNode : public LoadPNode { | |
| 423 public: | |
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424 LoadKlassNode( Node *c, Node *mem, Node *adr, const TypePtr *at, const TypeKlassPtr *tk ) |
| 0 | 425 : LoadPNode(c,mem,adr,at,tk) {} |
| 426 virtual int Opcode() const; | |
| 427 virtual const Type *Value( PhaseTransform *phase ) const; | |
| 428 virtual Node *Identity( PhaseTransform *phase ); | |
| 429 virtual bool depends_only_on_test() const { return true; } | |
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430 |
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431 // Polymorphic factory method: |
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432 static Node* make( PhaseGVN& gvn, Node *mem, Node *adr, const TypePtr* at, |
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433 const TypeKlassPtr *tk = TypeKlassPtr::OBJECT ); |
| 0 | 434 }; |
| 435 | |
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436 //------------------------------LoadNKlassNode--------------------------------- |
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437 // Load a narrow Klass from an object. |
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438 class LoadNKlassNode : public LoadNNode { |
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439 public: |
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440 LoadNKlassNode( Node *c, Node *mem, Node *adr, const TypePtr *at, const TypeNarrowOop *tk ) |
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441 : LoadNNode(c,mem,adr,at,tk) {} |
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442 virtual int Opcode() const; |
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443 virtual uint ideal_reg() const { return Op_RegN; } |
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444 virtual int store_Opcode() const { return Op_StoreN; } |
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445 virtual BasicType memory_type() const { return T_NARROWOOP; } |
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446 |
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447 virtual const Type *Value( PhaseTransform *phase ) const; |
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448 virtual Node *Identity( PhaseTransform *phase ); |
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449 virtual bool depends_only_on_test() const { return true; } |
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450 }; |
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451 |
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452 |
| 0 | 453 //------------------------------StoreNode-------------------------------------- |
| 454 // Store value; requires Store, Address and Value | |
| 455 class StoreNode : public MemNode { | |
| 456 protected: | |
| 457 virtual uint cmp( const Node &n ) const; | |
| 458 virtual bool depends_only_on_test() const { return false; } | |
| 459 | |
| 460 Node *Ideal_masked_input (PhaseGVN *phase, uint mask); | |
| 461 Node *Ideal_sign_extended_input(PhaseGVN *phase, int num_bits); | |
| 462 | |
| 463 public: | |
| 464 StoreNode( Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val ) | |
| 465 : MemNode(c,mem,adr,at,val) { | |
| 466 init_class_id(Class_Store); | |
| 467 } | |
| 468 StoreNode( Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val, Node *oop_store ) | |
| 469 : MemNode(c,mem,adr,at,val,oop_store) { | |
| 470 init_class_id(Class_Store); | |
| 471 } | |
| 472 | |
| 473 // Polymorphic factory method: | |
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474 static StoreNode* make( PhaseGVN& gvn, Node *c, Node *mem, Node *adr, |
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475 const TypePtr* at, Node *val, BasicType bt ); |
| 0 | 476 |
| 477 virtual uint hash() const; // Check the type | |
| 478 | |
| 479 // If the store is to Field memory and the pointer is non-null, we can | |
| 480 // zero out the control input. | |
| 481 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
| 482 | |
| 483 // Compute a new Type for this node. Basically we just do the pre-check, | |
| 484 // then call the virtual add() to set the type. | |
| 485 virtual const Type *Value( PhaseTransform *phase ) const; | |
| 486 | |
| 487 // Check for identity function on memory (Load then Store at same address) | |
| 488 virtual Node *Identity( PhaseTransform *phase ); | |
| 489 | |
| 490 // Do not match memory edge | |
| 491 virtual uint match_edge(uint idx) const; | |
| 492 | |
| 493 virtual const Type *bottom_type() const; // returns Type::MEMORY | |
| 494 | |
| 495 // Map a store opcode to its corresponding own opcode, trivially. | |
| 496 virtual int store_Opcode() const { return Opcode(); } | |
| 497 | |
| 498 // have all possible loads of the value stored been optimized away? | |
| 499 bool value_never_loaded(PhaseTransform *phase) const; | |
| 500 }; | |
| 501 | |
| 502 //------------------------------StoreBNode------------------------------------- | |
| 503 // Store byte to memory | |
| 504 class StoreBNode : public StoreNode { | |
| 505 public: | |
| 506 StoreBNode( Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val ) : StoreNode(c,mem,adr,at,val) {} | |
| 507 virtual int Opcode() const; | |
| 508 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
| 509 virtual BasicType memory_type() const { return T_BYTE; } | |
| 510 }; | |
| 511 | |
| 512 //------------------------------StoreCNode------------------------------------- | |
| 513 // Store char/short to memory | |
| 514 class StoreCNode : public StoreNode { | |
| 515 public: | |
| 516 StoreCNode( Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val ) : StoreNode(c,mem,adr,at,val) {} | |
| 517 virtual int Opcode() const; | |
| 518 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
| 519 virtual BasicType memory_type() const { return T_CHAR; } | |
| 520 }; | |
| 521 | |
| 522 //------------------------------StoreINode------------------------------------- | |
| 523 // Store int to memory | |
| 524 class StoreINode : public StoreNode { | |
| 525 public: | |
| 526 StoreINode( Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val ) : StoreNode(c,mem,adr,at,val) {} | |
| 527 virtual int Opcode() const; | |
| 528 virtual BasicType memory_type() const { return T_INT; } | |
| 529 }; | |
| 530 | |
| 531 //------------------------------StoreLNode------------------------------------- | |
| 532 // Store long to memory | |
| 533 class StoreLNode : public StoreNode { | |
| 534 virtual uint hash() const { return StoreNode::hash() + _require_atomic_access; } | |
| 535 virtual uint cmp( const Node &n ) const { | |
| 536 return _require_atomic_access == ((StoreLNode&)n)._require_atomic_access | |
| 537 && StoreNode::cmp(n); | |
| 538 } | |
| 539 virtual uint size_of() const { return sizeof(*this); } | |
| 540 const bool _require_atomic_access; // is piecewise store forbidden? | |
| 541 | |
| 542 public: | |
| 543 StoreLNode( Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val, | |
| 544 bool require_atomic_access = false ) | |
| 545 : StoreNode(c,mem,adr,at,val) | |
| 546 , _require_atomic_access(require_atomic_access) | |
| 547 {} | |
| 548 virtual int Opcode() const; | |
| 549 virtual BasicType memory_type() const { return T_LONG; } | |
| 550 bool require_atomic_access() { return _require_atomic_access; } | |
| 551 static StoreLNode* make_atomic(Compile *C, Node* ctl, Node* mem, Node* adr, const TypePtr* adr_type, Node* val); | |
| 552 #ifndef PRODUCT | |
| 553 virtual void dump_spec(outputStream *st) const { | |
| 554 StoreNode::dump_spec(st); | |
| 555 if (_require_atomic_access) st->print(" Atomic!"); | |
| 556 } | |
| 557 #endif | |
| 558 }; | |
| 559 | |
| 560 //------------------------------StoreFNode------------------------------------- | |
| 561 // Store float to memory | |
| 562 class StoreFNode : public StoreNode { | |
| 563 public: | |
| 564 StoreFNode( Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val ) : StoreNode(c,mem,adr,at,val) {} | |
| 565 virtual int Opcode() const; | |
| 566 virtual BasicType memory_type() const { return T_FLOAT; } | |
| 567 }; | |
| 568 | |
| 569 //------------------------------StoreDNode------------------------------------- | |
| 570 // Store double to memory | |
| 571 class StoreDNode : public StoreNode { | |
| 572 public: | |
| 573 StoreDNode( Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val ) : StoreNode(c,mem,adr,at,val) {} | |
| 574 virtual int Opcode() const; | |
| 575 virtual BasicType memory_type() const { return T_DOUBLE; } | |
| 576 }; | |
| 577 | |
| 578 //------------------------------StorePNode------------------------------------- | |
| 579 // Store pointer to memory | |
| 580 class StorePNode : public StoreNode { | |
| 581 public: | |
| 582 StorePNode( Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val ) : StoreNode(c,mem,adr,at,val) {} | |
| 583 virtual int Opcode() const; | |
| 584 virtual BasicType memory_type() const { return T_ADDRESS; } | |
| 585 }; | |
| 586 | |
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587 //------------------------------StoreNNode------------------------------------- |
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588 // Store narrow oop to memory |
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589 class StoreNNode : public StoreNode { |
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590 public: |
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591 StoreNNode( Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val ) : StoreNode(c,mem,adr,at,val) {} |
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592 virtual int Opcode() const; |
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593 virtual BasicType memory_type() const { return T_NARROWOOP; } |
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594 }; |
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595 |
| 0 | 596 //------------------------------StoreCMNode----------------------------------- |
| 597 // Store card-mark byte to memory for CM | |
| 598 // The last StoreCM before a SafePoint must be preserved and occur after its "oop" store | |
| 599 // Preceeding equivalent StoreCMs may be eliminated. | |
| 600 class StoreCMNode : public StoreNode { | |
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601 private: |
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602 virtual uint hash() const { return StoreNode::hash() + _oop_alias_idx; } |
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603 virtual uint cmp( const Node &n ) const { |
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604 return _oop_alias_idx == ((StoreCMNode&)n)._oop_alias_idx |
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605 && StoreNode::cmp(n); |
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606 } |
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607 virtual uint size_of() const { return sizeof(*this); } |
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608 int _oop_alias_idx; // The alias_idx of OopStore |
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609 |
| 0 | 610 public: |
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611 StoreCMNode( Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val, Node *oop_store, int oop_alias_idx ) : |
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612 StoreNode(c,mem,adr,at,val,oop_store), |
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613 _oop_alias_idx(oop_alias_idx) { |
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614 assert(_oop_alias_idx >= Compile::AliasIdxRaw || |
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615 _oop_alias_idx == Compile::AliasIdxBot && Compile::current()->AliasLevel() == 0, |
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616 "bad oop alias idx"); |
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617 } |
| 0 | 618 virtual int Opcode() const; |
| 619 virtual Node *Identity( PhaseTransform *phase ); | |
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620 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); |
| 0 | 621 virtual const Type *Value( PhaseTransform *phase ) const; |
| 622 virtual BasicType memory_type() const { return T_VOID; } // unspecific | |
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623 int oop_alias_idx() const { return _oop_alias_idx; } |
| 0 | 624 }; |
| 625 | |
| 626 //------------------------------LoadPLockedNode--------------------------------- | |
| 627 // Load-locked a pointer from memory (either object or array). | |
| 628 // On Sparc & Intel this is implemented as a normal pointer load. | |
| 629 // On PowerPC and friends it's a real load-locked. | |
| 630 class LoadPLockedNode : public LoadPNode { | |
| 631 public: | |
| 632 LoadPLockedNode( Node *c, Node *mem, Node *adr ) | |
| 633 : LoadPNode(c,mem,adr,TypeRawPtr::BOTTOM, TypeRawPtr::BOTTOM) {} | |
| 634 virtual int Opcode() const; | |
| 635 virtual int store_Opcode() const { return Op_StorePConditional; } | |
| 636 virtual bool depends_only_on_test() const { return true; } | |
| 637 }; | |
| 638 | |
| 639 //------------------------------SCMemProjNode--------------------------------------- | |
| 640 // This class defines a projection of the memory state of a store conditional node. | |
| 641 // These nodes return a value, but also update memory. | |
| 642 class SCMemProjNode : public ProjNode { | |
| 643 public: | |
| 644 enum {SCMEMPROJCON = (uint)-2}; | |
| 645 SCMemProjNode( Node *src) : ProjNode( src, SCMEMPROJCON) { } | |
| 646 virtual int Opcode() const; | |
| 647 virtual bool is_CFG() const { return false; } | |
| 648 virtual const Type *bottom_type() const {return Type::MEMORY;} | |
| 649 virtual const TypePtr *adr_type() const { return in(0)->in(MemNode::Memory)->adr_type();} | |
| 650 virtual uint ideal_reg() const { return 0;} // memory projections don't have a register | |
| 651 virtual const Type *Value( PhaseTransform *phase ) const; | |
| 652 #ifndef PRODUCT | |
| 653 virtual void dump_spec(outputStream *st) const {}; | |
| 654 #endif | |
| 655 }; | |
| 656 | |
| 657 //------------------------------LoadStoreNode--------------------------- | |
|
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658 // Note: is_Mem() method returns 'true' for this class. |
| 0 | 659 class LoadStoreNode : public Node { |
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660 private: |
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661 const Type* const _type; // What kind of value is loaded? |
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662 const TypePtr* _adr_type; // What kind of memory is being addressed? |
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663 virtual uint size_of() const; // Size is bigger |
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664 public: |
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665 LoadStoreNode( Node *c, Node *mem, Node *adr, Node *val, const TypePtr* at, const Type* rt, uint required ); |
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666 virtual bool depends_only_on_test() const { return false; } |
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667 virtual uint match_edge(uint idx) const { return idx == MemNode::Address || idx == MemNode::ValueIn; } |
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668 |
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669 virtual const Type *bottom_type() const { return _type; } |
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670 virtual uint ideal_reg() const; |
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671 virtual const class TypePtr *adr_type() const { return _adr_type; } // returns bottom_type of address |
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672 |
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673 bool result_not_used() const; |
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674 }; |
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675 |
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676 class LoadStoreConditionalNode : public LoadStoreNode { |
| 0 | 677 public: |
| 678 enum { | |
| 679 ExpectedIn = MemNode::ValueIn+1 // One more input than MemNode | |
| 680 }; | |
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681 LoadStoreConditionalNode(Node *c, Node *mem, Node *adr, Node *val, Node *ex); |
| 0 | 682 }; |
| 683 | |
| 684 //------------------------------StorePConditionalNode--------------------------- | |
| 685 // Conditionally store pointer to memory, if no change since prior | |
| 686 // load-locked. Sets flags for success or failure of the store. | |
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687 class StorePConditionalNode : public LoadStoreConditionalNode { |
| 0 | 688 public: |
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689 StorePConditionalNode( Node *c, Node *mem, Node *adr, Node *val, Node *ll ) : LoadStoreConditionalNode(c, mem, adr, val, ll) { } |
| 0 | 690 virtual int Opcode() const; |
| 691 // Produces flags | |
| 692 virtual uint ideal_reg() const { return Op_RegFlags; } | |
| 693 }; | |
| 694 | |
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695 //------------------------------StoreIConditionalNode--------------------------- |
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696 // Conditionally store int to memory, if no change since prior |
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697 // load-locked. Sets flags for success or failure of the store. |
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698 class StoreIConditionalNode : public LoadStoreConditionalNode { |
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699 public: |
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700 StoreIConditionalNode( Node *c, Node *mem, Node *adr, Node *val, Node *ii ) : LoadStoreConditionalNode(c, mem, adr, val, ii) { } |
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701 virtual int Opcode() const; |
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702 // Produces flags |
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703 virtual uint ideal_reg() const { return Op_RegFlags; } |
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704 }; |
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705 |
| 0 | 706 //------------------------------StoreLConditionalNode--------------------------- |
| 707 // Conditionally store long to memory, if no change since prior | |
| 708 // load-locked. Sets flags for success or failure of the store. | |
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709 class StoreLConditionalNode : public LoadStoreConditionalNode { |
| 0 | 710 public: |
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711 StoreLConditionalNode( Node *c, Node *mem, Node *adr, Node *val, Node *ll ) : LoadStoreConditionalNode(c, mem, adr, val, ll) { } |
| 0 | 712 virtual int Opcode() const; |
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713 // Produces flags |
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714 virtual uint ideal_reg() const { return Op_RegFlags; } |
| 0 | 715 }; |
| 716 | |
| 717 | |
| 718 //------------------------------CompareAndSwapLNode--------------------------- | |
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719 class CompareAndSwapLNode : public LoadStoreConditionalNode { |
| 0 | 720 public: |
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721 CompareAndSwapLNode( Node *c, Node *mem, Node *adr, Node *val, Node *ex) : LoadStoreConditionalNode(c, mem, adr, val, ex) { } |
| 0 | 722 virtual int Opcode() const; |
| 723 }; | |
| 724 | |
| 725 | |
| 726 //------------------------------CompareAndSwapINode--------------------------- | |
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727 class CompareAndSwapINode : public LoadStoreConditionalNode { |
| 0 | 728 public: |
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729 CompareAndSwapINode( Node *c, Node *mem, Node *adr, Node *val, Node *ex) : LoadStoreConditionalNode(c, mem, adr, val, ex) { } |
| 0 | 730 virtual int Opcode() const; |
| 731 }; | |
| 732 | |
| 733 | |
| 734 //------------------------------CompareAndSwapPNode--------------------------- | |
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735 class CompareAndSwapPNode : public LoadStoreConditionalNode { |
| 0 | 736 public: |
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737 CompareAndSwapPNode( Node *c, Node *mem, Node *adr, Node *val, Node *ex) : LoadStoreConditionalNode(c, mem, adr, val, ex) { } |
| 0 | 738 virtual int Opcode() const; |
| 739 }; | |
| 740 | |
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741 //------------------------------CompareAndSwapNNode--------------------------- |
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742 class CompareAndSwapNNode : public LoadStoreConditionalNode { |
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743 public: |
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744 CompareAndSwapNNode( Node *c, Node *mem, Node *adr, Node *val, Node *ex) : LoadStoreConditionalNode(c, mem, adr, val, ex) { } |
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745 virtual int Opcode() const; |
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746 }; |
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747 |
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748 //------------------------------GetAndAddINode--------------------------- |
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749 class GetAndAddINode : public LoadStoreNode { |
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750 public: |
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751 GetAndAddINode( Node *c, Node *mem, Node *adr, Node *val, const TypePtr* at ) : LoadStoreNode(c, mem, adr, val, at, TypeInt::INT, 4) { } |
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752 virtual int Opcode() const; |
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753 }; |
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754 |
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755 //------------------------------GetAndAddLNode--------------------------- |
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756 class GetAndAddLNode : public LoadStoreNode { |
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757 public: |
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758 GetAndAddLNode( Node *c, Node *mem, Node *adr, Node *val, const TypePtr* at ) : LoadStoreNode(c, mem, adr, val, at, TypeLong::LONG, 4) { } |
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759 virtual int Opcode() const; |
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760 }; |
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761 |
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762 |
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763 //------------------------------GetAndSetINode--------------------------- |
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764 class GetAndSetINode : public LoadStoreNode { |
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765 public: |
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766 GetAndSetINode( Node *c, Node *mem, Node *adr, Node *val, const TypePtr* at ) : LoadStoreNode(c, mem, adr, val, at, TypeInt::INT, 4) { } |
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767 virtual int Opcode() const; |
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768 }; |
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769 |
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770 //------------------------------GetAndSetINode--------------------------- |
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771 class GetAndSetLNode : public LoadStoreNode { |
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772 public: |
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773 GetAndSetLNode( Node *c, Node *mem, Node *adr, Node *val, const TypePtr* at ) : LoadStoreNode(c, mem, adr, val, at, TypeLong::LONG, 4) { } |
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774 virtual int Opcode() const; |
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775 }; |
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776 |
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777 //------------------------------GetAndSetPNode--------------------------- |
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778 class GetAndSetPNode : public LoadStoreNode { |
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779 public: |
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780 GetAndSetPNode( Node *c, Node *mem, Node *adr, Node *val, const TypePtr* at, const Type* t ) : LoadStoreNode(c, mem, adr, val, at, t, 4) { } |
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781 virtual int Opcode() const; |
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782 }; |
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783 |
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784 //------------------------------GetAndSetNNode--------------------------- |
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785 class GetAndSetNNode : public LoadStoreNode { |
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786 public: |
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787 GetAndSetNNode( Node *c, Node *mem, Node *adr, Node *val, const TypePtr* at, const Type* t ) : LoadStoreNode(c, mem, adr, val, at, t, 4) { } |
|
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788 virtual int Opcode() const; |
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789 }; |
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790 |
| 0 | 791 //------------------------------ClearArray------------------------------------- |
| 792 class ClearArrayNode: public Node { | |
| 793 public: | |
|
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794 ClearArrayNode( Node *ctrl, Node *arymem, Node *word_cnt, Node *base ) |
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795 : Node(ctrl,arymem,word_cnt,base) { |
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796 init_class_id(Class_ClearArray); |
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797 } |
| 0 | 798 virtual int Opcode() const; |
| 799 virtual const Type *bottom_type() const { return Type::MEMORY; } | |
| 800 // ClearArray modifies array elements, and so affects only the | |
| 801 // array memory addressed by the bottom_type of its base address. | |
| 802 virtual const class TypePtr *adr_type() const; | |
| 803 virtual Node *Identity( PhaseTransform *phase ); | |
| 804 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
| 805 virtual uint match_edge(uint idx) const; | |
| 806 | |
| 807 // Clear the given area of an object or array. | |
| 808 // The start offset must always be aligned mod BytesPerInt. | |
| 809 // The end offset must always be aligned mod BytesPerLong. | |
| 810 // Return the new memory. | |
| 811 static Node* clear_memory(Node* control, Node* mem, Node* dest, | |
| 812 intptr_t start_offset, | |
| 813 intptr_t end_offset, | |
| 814 PhaseGVN* phase); | |
| 815 static Node* clear_memory(Node* control, Node* mem, Node* dest, | |
| 816 intptr_t start_offset, | |
| 817 Node* end_offset, | |
| 818 PhaseGVN* phase); | |
| 819 static Node* clear_memory(Node* control, Node* mem, Node* dest, | |
| 820 Node* start_offset, | |
| 821 Node* end_offset, | |
| 822 PhaseGVN* phase); | |
|
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823 // Return allocation input memory edge if it is different instance |
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824 // or itself if it is the one we are looking for. |
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825 static bool step_through(Node** np, uint instance_id, PhaseTransform* phase); |
| 0 | 826 }; |
| 827 | |
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828 //------------------------------StrIntrinsic------------------------------- |
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829 // Base class for Ideal nodes used in String instrinsic code. |
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830 class StrIntrinsicNode: public Node { |
| 0 | 831 public: |
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832 StrIntrinsicNode(Node* control, Node* char_array_mem, |
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833 Node* s1, Node* c1, Node* s2, Node* c2): |
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834 Node(control, char_array_mem, s1, c1, s2, c2) { |
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835 } |
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836 |
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837 StrIntrinsicNode(Node* control, Node* char_array_mem, |
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838 Node* s1, Node* s2, Node* c): |
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839 Node(control, char_array_mem, s1, s2, c) { |
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840 } |
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841 |
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842 StrIntrinsicNode(Node* control, Node* char_array_mem, |
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843 Node* s1, Node* s2): |
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844 Node(control, char_array_mem, s1, s2) { |
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845 } |
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846 |
| 0 | 847 virtual bool depends_only_on_test() const { return false; } |
|
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848 virtual const TypePtr* adr_type() const { return TypeAryPtr::CHARS; } |
| 0 | 849 virtual uint match_edge(uint idx) const; |
| 850 virtual uint ideal_reg() const { return Op_RegI; } | |
| 851 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
| 4115 | 852 virtual const Type *Value(PhaseTransform *phase) const; |
| 0 | 853 }; |
| 854 | |
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855 //------------------------------StrComp------------------------------------- |
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856 class StrCompNode: public StrIntrinsicNode { |
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857 public: |
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858 StrCompNode(Node* control, Node* char_array_mem, |
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859 Node* s1, Node* c1, Node* s2, Node* c2): |
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860 StrIntrinsicNode(control, char_array_mem, s1, c1, s2, c2) {}; |
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861 virtual int Opcode() const; |
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862 virtual const Type* bottom_type() const { return TypeInt::INT; } |
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863 }; |
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864 |
| 681 | 865 //------------------------------StrEquals------------------------------------- |
|
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866 class StrEqualsNode: public StrIntrinsicNode { |
| 681 | 867 public: |
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868 StrEqualsNode(Node* control, Node* char_array_mem, |
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869 Node* s1, Node* s2, Node* c): |
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870 StrIntrinsicNode(control, char_array_mem, s1, s2, c) {}; |
| 681 | 871 virtual int Opcode() const; |
| 872 virtual const Type* bottom_type() const { return TypeInt::BOOL; } | |
| 873 }; | |
| 874 | |
| 875 //------------------------------StrIndexOf------------------------------------- | |
|
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876 class StrIndexOfNode: public StrIntrinsicNode { |
| 681 | 877 public: |
|
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878 StrIndexOfNode(Node* control, Node* char_array_mem, |
|
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879 Node* s1, Node* c1, Node* s2, Node* c2): |
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880 StrIntrinsicNode(control, char_array_mem, s1, c1, s2, c2) {}; |
| 681 | 881 virtual int Opcode() const; |
| 882 virtual const Type* bottom_type() const { return TypeInt::INT; } | |
| 883 }; | |
| 884 | |
|
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885 //------------------------------AryEq--------------------------------------- |
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886 class AryEqNode: public StrIntrinsicNode { |
|
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887 public: |
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888 AryEqNode(Node* control, Node* char_array_mem, Node* s1, Node* s2): |
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889 StrIntrinsicNode(control, char_array_mem, s1, s2) {}; |
|
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890 virtual int Opcode() const; |
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891 virtual const Type* bottom_type() const { return TypeInt::BOOL; } |
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892 }; |
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893 |
| 0 | 894 //------------------------------MemBar----------------------------------------- |
| 895 // There are different flavors of Memory Barriers to match the Java Memory | |
| 896 // Model. Monitor-enter and volatile-load act as Aquires: no following ref | |
| 897 // can be moved to before them. We insert a MemBar-Acquire after a FastLock or | |
| 898 // volatile-load. Monitor-exit and volatile-store act as Release: no | |
| 605 | 899 // preceding ref can be moved to after them. We insert a MemBar-Release |
| 0 | 900 // before a FastUnlock or volatile-store. All volatiles need to be |
| 901 // serialized, so we follow all volatile-stores with a MemBar-Volatile to | |
| 605 | 902 // separate it from any following volatile-load. |
| 0 | 903 class MemBarNode: public MultiNode { |
| 904 virtual uint hash() const ; // { return NO_HASH; } | |
| 905 virtual uint cmp( const Node &n ) const ; // Always fail, except on self | |
| 906 | |
| 907 virtual uint size_of() const { return sizeof(*this); } | |
| 908 // Memory type this node is serializing. Usually either rawptr or bottom. | |
| 909 const TypePtr* _adr_type; | |
| 910 | |
| 911 public: | |
| 912 enum { | |
| 913 Precedent = TypeFunc::Parms // optional edge to force precedence | |
| 914 }; | |
| 915 MemBarNode(Compile* C, int alias_idx, Node* precedent); | |
| 916 virtual int Opcode() const = 0; | |
| 917 virtual const class TypePtr *adr_type() const { return _adr_type; } | |
| 918 virtual const Type *Value( PhaseTransform *phase ) const; | |
| 919 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
| 920 virtual uint match_edge(uint idx) const { return 0; } | |
| 921 virtual const Type *bottom_type() const { return TypeTuple::MEMBAR; } | |
| 922 virtual Node *match( const ProjNode *proj, const Matcher *m ); | |
| 923 // Factory method. Builds a wide or narrow membar. | |
| 924 // Optional 'precedent' becomes an extra edge if not null. | |
| 925 static MemBarNode* make(Compile* C, int opcode, | |
| 926 int alias_idx = Compile::AliasIdxBot, | |
| 927 Node* precedent = NULL); | |
| 928 }; | |
| 929 | |
| 930 // "Acquire" - no following ref can move before (but earlier refs can | |
| 931 // follow, like an early Load stalled in cache). Requires multi-cpu | |
|
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932 // visibility. Inserted after a volatile load. |
| 0 | 933 class MemBarAcquireNode: public MemBarNode { |
| 934 public: | |
| 935 MemBarAcquireNode(Compile* C, int alias_idx, Node* precedent) | |
| 936 : MemBarNode(C, alias_idx, precedent) {} | |
| 937 virtual int Opcode() const; | |
| 938 }; | |
| 939 | |
| 940 // "Release" - no earlier ref can move after (but later refs can move | |
| 941 // up, like a speculative pipelined cache-hitting Load). Requires | |
|
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942 // multi-cpu visibility. Inserted before a volatile store. |
| 0 | 943 class MemBarReleaseNode: public MemBarNode { |
| 944 public: | |
| 945 MemBarReleaseNode(Compile* C, int alias_idx, Node* precedent) | |
| 946 : MemBarNode(C, alias_idx, precedent) {} | |
| 947 virtual int Opcode() const; | |
| 948 }; | |
| 949 | |
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950 // "Acquire" - no following ref can move before (but earlier refs can |
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951 // follow, like an early Load stalled in cache). Requires multi-cpu |
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952 // visibility. Inserted after a FastLock. |
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953 class MemBarAcquireLockNode: public MemBarNode { |
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954 public: |
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955 MemBarAcquireLockNode(Compile* C, int alias_idx, Node* precedent) |
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956 : MemBarNode(C, alias_idx, precedent) {} |
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957 virtual int Opcode() const; |
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958 }; |
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959 |
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960 // "Release" - no earlier ref can move after (but later refs can move |
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961 // up, like a speculative pipelined cache-hitting Load). Requires |
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962 // multi-cpu visibility. Inserted before a FastUnLock. |
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963 class MemBarReleaseLockNode: public MemBarNode { |
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964 public: |
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965 MemBarReleaseLockNode(Compile* C, int alias_idx, Node* precedent) |
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966 : MemBarNode(C, alias_idx, precedent) {} |
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967 virtual int Opcode() const; |
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968 }; |
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969 |
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970 class MemBarStoreStoreNode: public MemBarNode { |
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971 public: |
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972 MemBarStoreStoreNode(Compile* C, int alias_idx, Node* precedent) |
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973 : MemBarNode(C, alias_idx, precedent) { |
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974 init_class_id(Class_MemBarStoreStore); |
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975 } |
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976 virtual int Opcode() const; |
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977 }; |
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978 |
| 0 | 979 // Ordering between a volatile store and a following volatile load. |
| 980 // Requires multi-CPU visibility? | |
| 981 class MemBarVolatileNode: public MemBarNode { | |
| 982 public: | |
| 983 MemBarVolatileNode(Compile* C, int alias_idx, Node* precedent) | |
| 984 : MemBarNode(C, alias_idx, precedent) {} | |
| 985 virtual int Opcode() const; | |
| 986 }; | |
| 987 | |
| 988 // Ordering within the same CPU. Used to order unsafe memory references | |
| 989 // inside the compiler when we lack alias info. Not needed "outside" the | |
| 990 // compiler because the CPU does all the ordering for us. | |
| 991 class MemBarCPUOrderNode: public MemBarNode { | |
| 992 public: | |
| 993 MemBarCPUOrderNode(Compile* C, int alias_idx, Node* precedent) | |
| 994 : MemBarNode(C, alias_idx, precedent) {} | |
| 995 virtual int Opcode() const; | |
| 996 virtual uint ideal_reg() const { return 0; } // not matched in the AD file | |
| 997 }; | |
| 998 | |
| 999 // Isolation of object setup after an AllocateNode and before next safepoint. | |
| 1000 // (See comment in memnode.cpp near InitializeNode::InitializeNode for semantics.) | |
| 1001 class InitializeNode: public MemBarNode { | |
| 1002 friend class AllocateNode; | |
| 1003 | |
|
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1004 enum { |
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1005 Incomplete = 0, |
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1006 Complete = 1, |
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1007 WithArraycopy = 2 |
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1008 }; |
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1009 int _is_complete; |
| 0 | 1010 |
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1011 bool _does_not_escape; |
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1012 |
| 0 | 1013 public: |
| 1014 enum { | |
| 1015 Control = TypeFunc::Control, | |
| 1016 Memory = TypeFunc::Memory, // MergeMem for states affected by this op | |
| 1017 RawAddress = TypeFunc::Parms+0, // the newly-allocated raw address | |
| 1018 RawStores = TypeFunc::Parms+1 // zero or more stores (or TOP) | |
| 1019 }; | |
| 1020 | |
| 1021 InitializeNode(Compile* C, int adr_type, Node* rawoop); | |
| 1022 virtual int Opcode() const; | |
| 1023 virtual uint size_of() const { return sizeof(*this); } | |
| 1024 virtual uint ideal_reg() const { return 0; } // not matched in the AD file | |
| 1025 virtual const RegMask &in_RegMask(uint) const; // mask for RawAddress | |
| 1026 | |
| 1027 // Manage incoming memory edges via a MergeMem on in(Memory): | |
| 1028 Node* memory(uint alias_idx); | |
| 1029 | |
| 1030 // The raw memory edge coming directly from the Allocation. | |
| 1031 // The contents of this memory are *always* all-zero-bits. | |
| 1032 Node* zero_memory() { return memory(Compile::AliasIdxRaw); } | |
| 1033 | |
| 1034 // Return the corresponding allocation for this initialization (or null if none). | |
| 1035 // (Note: Both InitializeNode::allocation and AllocateNode::initialization | |
| 1036 // are defined in graphKit.cpp, which sets up the bidirectional relation.) | |
| 1037 AllocateNode* allocation(); | |
| 1038 | |
| 1039 // Anything other than zeroing in this init? | |
| 1040 bool is_non_zero(); | |
| 1041 | |
| 1042 // An InitializeNode must completed before macro expansion is done. | |
| 1043 // Completion requires that the AllocateNode must be followed by | |
| 1044 // initialization of the new memory to zero, then to any initializers. | |
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1045 bool is_complete() { return _is_complete != Incomplete; } |
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1046 bool is_complete_with_arraycopy() { return (_is_complete & WithArraycopy) != 0; } |
| 0 | 1047 |
| 1048 // Mark complete. (Must not yet be complete.) | |
| 1049 void set_complete(PhaseGVN* phase); | |
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1050 void set_complete_with_arraycopy() { _is_complete = Complete | WithArraycopy; } |
| 0 | 1051 |
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1052 bool does_not_escape() { return _does_not_escape; } |
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1053 void set_does_not_escape() { _does_not_escape = true; } |
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1054 |
| 0 | 1055 #ifdef ASSERT |
| 1056 // ensure all non-degenerate stores are ordered and non-overlapping | |
| 1057 bool stores_are_sane(PhaseTransform* phase); | |
| 1058 #endif //ASSERT | |
| 1059 | |
| 1060 // See if this store can be captured; return offset where it initializes. | |
| 1061 // Return 0 if the store cannot be moved (any sort of problem). | |
| 1062 intptr_t can_capture_store(StoreNode* st, PhaseTransform* phase); | |
| 1063 | |
| 1064 // Capture another store; reformat it to write my internal raw memory. | |
| 1065 // Return the captured copy, else NULL if there is some sort of problem. | |
| 1066 Node* capture_store(StoreNode* st, intptr_t start, PhaseTransform* phase); | |
| 1067 | |
| 1068 // Find captured store which corresponds to the range [start..start+size). | |
| 1069 // Return my own memory projection (meaning the initial zero bits) | |
| 1070 // if there is no such store. Return NULL if there is a problem. | |
| 1071 Node* find_captured_store(intptr_t start, int size_in_bytes, PhaseTransform* phase); | |
| 1072 | |
| 1073 // Called when the associated AllocateNode is expanded into CFG. | |
| 1074 Node* complete_stores(Node* rawctl, Node* rawmem, Node* rawptr, | |
| 1075 intptr_t header_size, Node* size_in_bytes, | |
| 1076 PhaseGVN* phase); | |
| 1077 | |
| 1078 private: | |
| 1079 void remove_extra_zeroes(); | |
| 1080 | |
| 1081 // Find out where a captured store should be placed (or already is placed). | |
| 1082 int captured_store_insertion_point(intptr_t start, int size_in_bytes, | |
| 1083 PhaseTransform* phase); | |
| 1084 | |
| 1085 static intptr_t get_store_offset(Node* st, PhaseTransform* phase); | |
| 1086 | |
| 1087 Node* make_raw_address(intptr_t offset, PhaseTransform* phase); | |
| 1088 | |
| 1089 bool detect_init_independence(Node* n, bool st_is_pinned, int& count); | |
| 1090 | |
| 1091 void coalesce_subword_stores(intptr_t header_size, Node* size_in_bytes, | |
| 1092 PhaseGVN* phase); | |
| 1093 | |
| 1094 intptr_t find_next_fullword_store(uint i, PhaseGVN* phase); | |
| 1095 }; | |
| 1096 | |
| 1097 //------------------------------MergeMem--------------------------------------- | |
| 1098 // (See comment in memnode.cpp near MergeMemNode::MergeMemNode for semantics.) | |
| 1099 class MergeMemNode: public Node { | |
| 1100 virtual uint hash() const ; // { return NO_HASH; } | |
| 1101 virtual uint cmp( const Node &n ) const ; // Always fail, except on self | |
| 1102 friend class MergeMemStream; | |
| 1103 MergeMemNode(Node* def); // clients use MergeMemNode::make | |
| 1104 | |
| 1105 public: | |
| 1106 // If the input is a whole memory state, clone it with all its slices intact. | |
| 1107 // Otherwise, make a new memory state with just that base memory input. | |
| 1108 // In either case, the result is a newly created MergeMem. | |
| 1109 static MergeMemNode* make(Compile* C, Node* base_memory); | |
| 1110 | |
| 1111 virtual int Opcode() const; | |
| 1112 virtual Node *Identity( PhaseTransform *phase ); | |
| 1113 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
| 1114 virtual uint ideal_reg() const { return NotAMachineReg; } | |
| 1115 virtual uint match_edge(uint idx) const { return 0; } | |
| 1116 virtual const RegMask &out_RegMask() const; | |
| 1117 virtual const Type *bottom_type() const { return Type::MEMORY; } | |
| 1118 virtual const TypePtr *adr_type() const { return TypePtr::BOTTOM; } | |
| 1119 // sparse accessors | |
| 1120 // Fetch the previously stored "set_memory_at", or else the base memory. | |
| 1121 // (Caller should clone it if it is a phi-nest.) | |
| 1122 Node* memory_at(uint alias_idx) const; | |
| 1123 // set the memory, regardless of its previous value | |
| 1124 void set_memory_at(uint alias_idx, Node* n); | |
| 1125 // the "base" is the memory that provides the non-finite support | |
| 1126 Node* base_memory() const { return in(Compile::AliasIdxBot); } | |
| 1127 // warning: setting the base can implicitly set any of the other slices too | |
| 1128 void set_base_memory(Node* def); | |
| 1129 // sentinel value which denotes a copy of the base memory: | |
| 1130 Node* empty_memory() const { return in(Compile::AliasIdxTop); } | |
| 1131 static Node* make_empty_memory(); // where the sentinel comes from | |
| 1132 bool is_empty_memory(Node* n) const { assert((n == empty_memory()) == n->is_top(), "sanity"); return n->is_top(); } | |
| 1133 // hook for the iterator, to perform any necessary setup | |
| 1134 void iteration_setup(const MergeMemNode* other = NULL); | |
| 1135 // push sentinels until I am at least as long as the other (semantic no-op) | |
| 1136 void grow_to_match(const MergeMemNode* other); | |
| 1137 bool verify_sparse() const PRODUCT_RETURN0; | |
| 1138 #ifndef PRODUCT | |
| 1139 virtual void dump_spec(outputStream *st) const; | |
| 1140 #endif | |
| 1141 }; | |
| 1142 | |
| 1143 class MergeMemStream : public StackObj { | |
| 1144 private: | |
| 1145 MergeMemNode* _mm; | |
| 1146 const MergeMemNode* _mm2; // optional second guy, contributes non-empty iterations | |
| 1147 Node* _mm_base; // loop-invariant base memory of _mm | |
| 1148 int _idx; | |
| 1149 int _cnt; | |
| 1150 Node* _mem; | |
| 1151 Node* _mem2; | |
| 1152 int _cnt2; | |
| 1153 | |
| 1154 void init(MergeMemNode* mm, const MergeMemNode* mm2 = NULL) { | |
| 1155 // subsume_node will break sparseness at times, whenever a memory slice | |
| 1156 // folds down to a copy of the base ("fat") memory. In such a case, | |
| 1157 // the raw edge will update to base, although it should be top. | |
| 1158 // This iterator will recognize either top or base_memory as an | |
| 1159 // "empty" slice. See is_empty, is_empty2, and next below. | |
| 1160 // | |
| 1161 // The sparseness property is repaired in MergeMemNode::Ideal. | |
| 1162 // As long as access to a MergeMem goes through this iterator | |
| 1163 // or the memory_at accessor, flaws in the sparseness will | |
| 1164 // never be observed. | |
| 1165 // | |
| 1166 // Also, iteration_setup repairs sparseness. | |
| 1167 assert(mm->verify_sparse(), "please, no dups of base"); | |
| 1168 assert(mm2==NULL || mm2->verify_sparse(), "please, no dups of base"); | |
| 1169 | |
| 1170 _mm = mm; | |
| 1171 _mm_base = mm->base_memory(); | |
| 1172 _mm2 = mm2; | |
| 1173 _cnt = mm->req(); | |
| 1174 _idx = Compile::AliasIdxBot-1; // start at the base memory | |
| 1175 _mem = NULL; | |
| 1176 _mem2 = NULL; | |
| 1177 } | |
| 1178 | |
| 1179 #ifdef ASSERT | |
| 1180 Node* check_memory() const { | |
| 1181 if (at_base_memory()) | |
| 1182 return _mm->base_memory(); | |
| 1183 else if ((uint)_idx < _mm->req() && !_mm->in(_idx)->is_top()) | |
| 1184 return _mm->memory_at(_idx); | |
| 1185 else | |
| 1186 return _mm_base; | |
| 1187 } | |
| 1188 Node* check_memory2() const { | |
| 1189 return at_base_memory()? _mm2->base_memory(): _mm2->memory_at(_idx); | |
| 1190 } | |
| 1191 #endif | |
| 1192 | |
| 1193 static bool match_memory(Node* mem, const MergeMemNode* mm, int idx) PRODUCT_RETURN0; | |
| 1194 void assert_synch() const { | |
| 1195 assert(!_mem || _idx >= _cnt || match_memory(_mem, _mm, _idx), | |
| 1196 "no side-effects except through the stream"); | |
| 1197 } | |
| 1198 | |
| 1199 public: | |
| 1200 | |
| 1201 // expected usages: | |
| 1202 // for (MergeMemStream mms(mem->is_MergeMem()); next_non_empty(); ) { ... } | |
| 1203 // for (MergeMemStream mms(mem1, mem2); next_non_empty2(); ) { ... } | |
| 1204 | |
| 1205 // iterate over one merge | |
| 1206 MergeMemStream(MergeMemNode* mm) { | |
| 1207 mm->iteration_setup(); | |
| 1208 init(mm); | |
| 1209 debug_only(_cnt2 = 999); | |
| 1210 } | |
| 1211 // iterate in parallel over two merges | |
| 1212 // only iterates through non-empty elements of mm2 | |
| 1213 MergeMemStream(MergeMemNode* mm, const MergeMemNode* mm2) { | |
| 1214 assert(mm2, "second argument must be a MergeMem also"); | |
| 1215 ((MergeMemNode*)mm2)->iteration_setup(); // update hidden state | |
| 1216 mm->iteration_setup(mm2); | |
| 1217 init(mm, mm2); | |
| 1218 _cnt2 = mm2->req(); | |
| 1219 } | |
| 1220 #ifdef ASSERT | |
| 1221 ~MergeMemStream() { | |
| 1222 assert_synch(); | |
| 1223 } | |
| 1224 #endif | |
| 1225 | |
| 1226 MergeMemNode* all_memory() const { | |
| 1227 return _mm; | |
| 1228 } | |
| 1229 Node* base_memory() const { | |
| 1230 assert(_mm_base == _mm->base_memory(), "no update to base memory, please"); | |
| 1231 return _mm_base; | |
| 1232 } | |
| 1233 const MergeMemNode* all_memory2() const { | |
| 1234 assert(_mm2 != NULL, ""); | |
| 1235 return _mm2; | |
| 1236 } | |
| 1237 bool at_base_memory() const { | |
| 1238 return _idx == Compile::AliasIdxBot; | |
| 1239 } | |
| 1240 int alias_idx() const { | |
| 1241 assert(_mem, "must call next 1st"); | |
| 1242 return _idx; | |
| 1243 } | |
| 1244 | |
| 1245 const TypePtr* adr_type() const { | |
| 1246 return Compile::current()->get_adr_type(alias_idx()); | |
| 1247 } | |
| 1248 | |
| 1249 const TypePtr* adr_type(Compile* C) const { | |
| 1250 return C->get_adr_type(alias_idx()); | |
| 1251 } | |
| 1252 bool is_empty() const { | |
| 1253 assert(_mem, "must call next 1st"); | |
| 1254 assert(_mem->is_top() == (_mem==_mm->empty_memory()), "correct sentinel"); | |
| 1255 return _mem->is_top(); | |
| 1256 } | |
| 1257 bool is_empty2() const { | |
| 1258 assert(_mem2, "must call next 1st"); | |
| 1259 assert(_mem2->is_top() == (_mem2==_mm2->empty_memory()), "correct sentinel"); | |
| 1260 return _mem2->is_top(); | |
| 1261 } | |
| 1262 Node* memory() const { | |
| 1263 assert(!is_empty(), "must not be empty"); | |
| 1264 assert_synch(); | |
| 1265 return _mem; | |
| 1266 } | |
| 1267 // get the current memory, regardless of empty or non-empty status | |
| 1268 Node* force_memory() const { | |
| 1269 assert(!is_empty() || !at_base_memory(), ""); | |
| 1270 // Use _mm_base to defend against updates to _mem->base_memory(). | |
| 1271 Node *mem = _mem->is_top() ? _mm_base : _mem; | |
| 1272 assert(mem == check_memory(), ""); | |
| 1273 return mem; | |
| 1274 } | |
| 1275 Node* memory2() const { | |
| 1276 assert(_mem2 == check_memory2(), ""); | |
| 1277 return _mem2; | |
| 1278 } | |
| 1279 void set_memory(Node* mem) { | |
| 1280 if (at_base_memory()) { | |
| 1281 // Note that this does not change the invariant _mm_base. | |
| 1282 _mm->set_base_memory(mem); | |
| 1283 } else { | |
| 1284 _mm->set_memory_at(_idx, mem); | |
| 1285 } | |
| 1286 _mem = mem; | |
| 1287 assert_synch(); | |
| 1288 } | |
| 1289 | |
| 1290 // Recover from a side effect to the MergeMemNode. | |
| 1291 void set_memory() { | |
| 1292 _mem = _mm->in(_idx); | |
| 1293 } | |
| 1294 | |
| 1295 bool next() { return next(false); } | |
| 1296 bool next2() { return next(true); } | |
| 1297 | |
| 1298 bool next_non_empty() { return next_non_empty(false); } | |
| 1299 bool next_non_empty2() { return next_non_empty(true); } | |
| 1300 // next_non_empty2 can yield states where is_empty() is true | |
| 1301 | |
| 1302 private: | |
| 1303 // find the next item, which might be empty | |
| 1304 bool next(bool have_mm2) { | |
| 1305 assert((_mm2 != NULL) == have_mm2, "use other next"); | |
| 1306 assert_synch(); | |
| 1307 if (++_idx < _cnt) { | |
| 1308 // Note: This iterator allows _mm to be non-sparse. | |
| 1309 // It behaves the same whether _mem is top or base_memory. | |
| 1310 _mem = _mm->in(_idx); | |
| 1311 if (have_mm2) | |
| 1312 _mem2 = _mm2->in((_idx < _cnt2) ? _idx : Compile::AliasIdxTop); | |
| 1313 return true; | |
| 1314 } | |
| 1315 return false; | |
| 1316 } | |
| 1317 | |
| 1318 // find the next non-empty item | |
| 1319 bool next_non_empty(bool have_mm2) { | |
| 1320 while (next(have_mm2)) { | |
| 1321 if (!is_empty()) { | |
| 1322 // make sure _mem2 is filled in sensibly | |
| 1323 if (have_mm2 && _mem2->is_top()) _mem2 = _mm2->base_memory(); | |
| 1324 return true; | |
| 1325 } else if (have_mm2 && !is_empty2()) { | |
| 1326 return true; // is_empty() == true | |
| 1327 } | |
| 1328 } | |
| 1329 return false; | |
| 1330 } | |
| 1331 }; | |
| 1332 | |
| 1333 //------------------------------Prefetch--------------------------------------- | |
| 1334 | |
| 1335 // Non-faulting prefetch load. Prefetch for many reads. | |
| 1336 class PrefetchReadNode : public Node { | |
| 1337 public: | |
| 1338 PrefetchReadNode(Node *abio, Node *adr) : Node(0,abio,adr) {} | |
| 1339 virtual int Opcode() const; | |
| 1340 virtual uint ideal_reg() const { return NotAMachineReg; } | |
| 1341 virtual uint match_edge(uint idx) const { return idx==2; } | |
| 1342 virtual const Type *bottom_type() const { return Type::ABIO; } | |
| 1343 }; | |
| 1344 | |
| 1345 // Non-faulting prefetch load. Prefetch for many reads & many writes. | |
| 1346 class PrefetchWriteNode : public Node { | |
| 1347 public: | |
| 1348 PrefetchWriteNode(Node *abio, Node *adr) : Node(0,abio,adr) {} | |
| 1349 virtual int Opcode() const; | |
| 1350 virtual uint ideal_reg() const { return NotAMachineReg; } | |
| 1351 virtual uint match_edge(uint idx) const { return idx==2; } | |
| 3854 | 1352 virtual const Type *bottom_type() const { return Type::ABIO; } |
| 1353 }; | |
| 1354 | |
| 1355 // Allocation prefetch which may fault, TLAB size have to be adjusted. | |
| 1356 class PrefetchAllocationNode : public Node { | |
| 1357 public: | |
| 1358 PrefetchAllocationNode(Node *mem, Node *adr) : Node(0,mem,adr) {} | |
| 1359 virtual int Opcode() const; | |
| 1360 virtual uint ideal_reg() const { return NotAMachineReg; } | |
| 1361 virtual uint match_edge(uint idx) const { return idx==2; } | |
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1362 virtual const Type *bottom_type() const { return ( AllocatePrefetchStyle == 3 ) ? Type::MEMORY : Type::ABIO; } |
| 0 | 1363 }; |
| 1972 | 1364 |
| 1365 #endif // SHARE_VM_OPTO_MEMNODE_HPP |