Mercurial > hg > graal-compiler
annotate src/share/vm/opto/memnode.hpp @ 14429:2113136690bc
8024921: PPC64 (part 113): Extend Load and Store nodes to know about memory ordering
Summary: Add a field to C2 LoadNode and StoreNode classes which indicates whether the load/store should do an acquire/release on platforms which support it.
Reviewed-by: kvn
author | goetz |
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date | Fri, 15 Nov 2013 11:05:32 -0800 |
parents | 6f3fd5150b67 |
children | da862781b584 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #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 }; | |
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54 typedef enum { unordered = 0, |
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55 acquire, // Load has to acquire or be succeeded by MemBarAcquire. |
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56 release // Store has to release or be preceded by MemBarRelease. |
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57 } MemOrd; |
0 | 58 protected: |
59 MemNode( Node *c0, Node *c1, Node *c2, const TypePtr* at ) | |
60 : Node(c0,c1,c2 ) { | |
61 init_class_id(Class_Mem); | |
62 debug_only(_adr_type=at; adr_type();) | |
63 } | |
64 MemNode( Node *c0, Node *c1, Node *c2, const TypePtr* at, Node *c3 ) | |
65 : Node(c0,c1,c2,c3) { | |
66 init_class_id(Class_Mem); | |
67 debug_only(_adr_type=at; adr_type();) | |
68 } | |
69 MemNode( Node *c0, Node *c1, Node *c2, const TypePtr* at, Node *c3, Node *c4) | |
70 : Node(c0,c1,c2,c3,c4) { | |
71 init_class_id(Class_Mem); | |
72 debug_only(_adr_type=at; adr_type();) | |
73 } | |
74 | |
33 | 75 public: |
0 | 76 // Helpers for the optimizer. Documented in memnode.cpp. |
77 static bool detect_ptr_independence(Node* p1, AllocateNode* a1, | |
78 Node* p2, AllocateNode* a2, | |
79 PhaseTransform* phase); | |
80 static bool adr_phi_is_loop_invariant(Node* adr_phi, Node* cast); | |
81 | |
10278 | 82 static Node *optimize_simple_memory_chain(Node *mchain, const TypeOopPtr *t_oop, Node *load, PhaseGVN *phase); |
83 static Node *optimize_memory_chain(Node *mchain, const TypePtr *t_adr, Node *load, PhaseGVN *phase); | |
0 | 84 // This one should probably be a phase-specific function: |
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85 static bool all_controls_dominate(Node* dom, Node* sub); |
0 | 86 |
163 | 87 // Find any cast-away of null-ness and keep its control. |
88 static Node *Ideal_common_DU_postCCP( PhaseCCP *ccp, Node* n, Node* adr ); | |
0 | 89 virtual Node *Ideal_DU_postCCP( PhaseCCP *ccp ); |
90 | |
91 virtual const class TypePtr *adr_type() const; // returns bottom_type of address | |
92 | |
93 // Shared code for Ideal methods: | |
94 Node *Ideal_common(PhaseGVN *phase, bool can_reshape); // Return -1 for short-circuit NULL. | |
95 | |
96 // Helper function for adr_type() implementations. | |
97 static const TypePtr* calculate_adr_type(const Type* t, const TypePtr* cross_check = NULL); | |
98 | |
99 // Raw access function, to allow copying of adr_type efficiently in | |
100 // product builds and retain the debug info for debug builds. | |
101 const TypePtr *raw_adr_type() const { | |
102 #ifdef ASSERT | |
103 return _adr_type; | |
104 #else | |
105 return 0; | |
106 #endif | |
107 } | |
108 | |
109 // Map a load or store opcode to its corresponding store opcode. | |
110 // (Return -1 if unknown.) | |
111 virtual int store_Opcode() const { return -1; } | |
112 | |
113 // What is the type of the value in memory? (T_VOID mean "unspecified".) | |
114 virtual BasicType memory_type() const = 0; | |
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115 virtual int memory_size() const { |
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116 #ifdef ASSERT |
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117 return type2aelembytes(memory_type(), true); |
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118 #else |
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119 return type2aelembytes(memory_type()); |
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120 #endif |
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121 } |
0 | 122 |
123 // Search through memory states which precede this node (load or store). | |
124 // Look for an exact match for the address, with no intervening | |
125 // aliased stores. | |
126 Node* find_previous_store(PhaseTransform* phase); | |
127 | |
128 // Can this node (load or store) accurately see a stored value in | |
129 // the given memory state? (The state may or may not be in(Memory).) | |
130 Node* can_see_stored_value(Node* st, PhaseTransform* phase) const; | |
131 | |
132 #ifndef PRODUCT | |
133 static void dump_adr_type(const Node* mem, const TypePtr* adr_type, outputStream *st); | |
134 virtual void dump_spec(outputStream *st) const; | |
135 #endif | |
136 }; | |
137 | |
138 //------------------------------LoadNode--------------------------------------- | |
139 // Load value; requires Memory and Address | |
140 class LoadNode : public MemNode { | |
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141 private: |
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142 // On platforms with weak memory ordering (e.g., PPC, Ia64) we distinguish |
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143 // loads that can be reordered, and such requiring acquire semantics to |
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144 // adhere to the Java specification. The required behaviour is stored in |
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145 // this field. |
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146 const MemOrd _mo; |
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147 |
0 | 148 protected: |
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149 virtual uint cmp(const Node &n) const; |
0 | 150 virtual uint size_of() const; // Size is bigger |
151 const Type* const _type; // What kind of value is loaded? | |
152 public: | |
153 | |
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154 LoadNode(Node *c, Node *mem, Node *adr, const TypePtr* at, const Type *rt, MemOrd mo) |
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155 : MemNode(c,mem,adr,at), _type(rt), _mo(mo) { |
0 | 156 init_class_id(Class_Load); |
157 } | |
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158 inline bool is_unordered() const { return !is_acquire(); } |
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159 inline bool is_acquire() const { |
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160 assert(_mo == unordered || _mo == acquire, "unexpected"); |
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161 return _mo == acquire; |
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162 } |
0 | 163 |
164 // Polymorphic factory method: | |
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165 static Node* make(PhaseGVN& gvn, Node *c, Node *mem, Node *adr, |
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166 const TypePtr* at, const Type *rt, BasicType bt, MemOrd mo); |
0 | 167 |
168 virtual uint hash() const; // Check the type | |
169 | |
170 // Handle algebraic identities here. If we have an identity, return the Node | |
171 // we are equivalent to. We look for Load of a Store. | |
172 virtual Node *Identity( PhaseTransform *phase ); | |
173 | |
174 // If the load is from Field memory and the pointer is non-null, we can | |
175 // zero out the control input. | |
176 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
177 | |
163 | 178 // Split instance field load through Phi. |
179 Node* split_through_phi(PhaseGVN *phase); | |
180 | |
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181 // Recover original value from boxed values |
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182 Node *eliminate_autobox(PhaseGVN *phase); |
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183 |
0 | 184 // Compute a new Type for this node. Basically we just do the pre-check, |
185 // then call the virtual add() to set the type. | |
186 virtual const Type *Value( PhaseTransform *phase ) const; | |
187 | |
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188 // Common methods for LoadKlass and LoadNKlass nodes. |
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189 const Type *klass_value_common( PhaseTransform *phase ) const; |
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190 Node *klass_identity_common( PhaseTransform *phase ); |
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191 |
0 | 192 virtual uint ideal_reg() const; |
193 virtual const Type *bottom_type() const; | |
194 // Following method is copied from TypeNode: | |
195 void set_type(const Type* t) { | |
196 assert(t != NULL, "sanity"); | |
197 debug_only(uint check_hash = (VerifyHashTableKeys && _hash_lock) ? hash() : NO_HASH); | |
198 *(const Type**)&_type = t; // cast away const-ness | |
199 // If this node is in the hash table, make sure it doesn't need a rehash. | |
200 assert(check_hash == NO_HASH || check_hash == hash(), "type change must preserve hash code"); | |
201 } | |
202 const Type* type() const { assert(_type != NULL, "sanity"); return _type; }; | |
203 | |
204 // Do not match memory edge | |
205 virtual uint match_edge(uint idx) const; | |
206 | |
207 // Map a load opcode to its corresponding store opcode. | |
208 virtual int store_Opcode() const = 0; | |
209 | |
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210 // Check if the load's memory input is a Phi node with the same control. |
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211 bool is_instance_field_load_with_local_phi(Node* ctrl); |
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212 |
0 | 213 #ifndef PRODUCT |
214 virtual void dump_spec(outputStream *st) const; | |
215 #endif | |
1609 | 216 #ifdef ASSERT |
217 // Helper function to allow a raw load without control edge for some cases | |
218 static bool is_immutable_value(Node* adr); | |
219 #endif | |
0 | 220 protected: |
221 const Type* load_array_final_field(const TypeKlassPtr *tkls, | |
222 ciKlass* klass) const; | |
223 }; | |
224 | |
225 //------------------------------LoadBNode-------------------------------------- | |
226 // Load a byte (8bits signed) from memory | |
227 class LoadBNode : public LoadNode { | |
228 public: | |
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229 LoadBNode(Node *c, Node *mem, Node *adr, const TypePtr* at, const TypeInt *ti, MemOrd mo) |
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230 : LoadNode(c, mem, adr, at, ti, mo) {} |
0 | 231 virtual int Opcode() const; |
232 virtual uint ideal_reg() const { return Op_RegI; } | |
233 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
4815 | 234 virtual const Type *Value(PhaseTransform *phase) const; |
0 | 235 virtual int store_Opcode() const { return Op_StoreB; } |
236 virtual BasicType memory_type() const { return T_BYTE; } | |
237 }; | |
238 | |
624 | 239 //------------------------------LoadUBNode------------------------------------- |
240 // Load a unsigned byte (8bits unsigned) from memory | |
241 class LoadUBNode : public LoadNode { | |
242 public: | |
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243 LoadUBNode(Node* c, Node* mem, Node* adr, const TypePtr* at, const TypeInt* ti, MemOrd mo) |
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244 : LoadNode(c, mem, adr, at, ti, mo) {} |
624 | 245 virtual int Opcode() const; |
246 virtual uint ideal_reg() const { return Op_RegI; } | |
247 virtual Node* Ideal(PhaseGVN *phase, bool can_reshape); | |
4815 | 248 virtual const Type *Value(PhaseTransform *phase) const; |
624 | 249 virtual int store_Opcode() const { return Op_StoreB; } |
250 virtual BasicType memory_type() const { return T_BYTE; } | |
251 }; | |
252 | |
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253 //------------------------------LoadUSNode------------------------------------- |
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254 // Load an unsigned short/char (16bits unsigned) from memory |
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255 class LoadUSNode : public LoadNode { |
0 | 256 public: |
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257 LoadUSNode(Node *c, Node *mem, Node *adr, const TypePtr* at, const TypeInt *ti, MemOrd mo) |
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258 : LoadNode(c, mem, adr, at, ti, mo) {} |
0 | 259 virtual int Opcode() const; |
260 virtual uint ideal_reg() const { return Op_RegI; } | |
261 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
4815 | 262 virtual const Type *Value(PhaseTransform *phase) const; |
0 | 263 virtual int store_Opcode() const { return Op_StoreC; } |
264 virtual BasicType memory_type() const { return T_CHAR; } | |
265 }; | |
266 | |
4815 | 267 //------------------------------LoadSNode-------------------------------------- |
268 // Load a short (16bits signed) from memory | |
269 class LoadSNode : public LoadNode { | |
270 public: | |
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271 LoadSNode(Node *c, Node *mem, Node *adr, const TypePtr* at, const TypeInt *ti, MemOrd mo) |
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272 : LoadNode(c, mem, adr, at, ti, mo) {} |
4815 | 273 virtual int Opcode() const; |
274 virtual uint ideal_reg() const { return Op_RegI; } | |
275 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
276 virtual const Type *Value(PhaseTransform *phase) const; | |
277 virtual int store_Opcode() const { return Op_StoreC; } | |
278 virtual BasicType memory_type() const { return T_SHORT; } | |
279 }; | |
280 | |
0 | 281 //------------------------------LoadINode-------------------------------------- |
282 // Load an integer from memory | |
283 class LoadINode : public LoadNode { | |
284 public: | |
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285 LoadINode(Node *c, Node *mem, Node *adr, const TypePtr* at, const TypeInt *ti, MemOrd mo) |
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286 : LoadNode(c, mem, adr, at, ti, mo) {} |
0 | 287 virtual int Opcode() const; |
288 virtual uint ideal_reg() const { return Op_RegI; } | |
289 virtual int store_Opcode() const { return Op_StoreI; } | |
290 virtual BasicType memory_type() const { return T_INT; } | |
291 }; | |
292 | |
293 //------------------------------LoadRangeNode---------------------------------- | |
294 // Load an array length from the array | |
295 class LoadRangeNode : public LoadINode { | |
296 public: | |
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297 LoadRangeNode(Node *c, Node *mem, Node *adr, const TypeInt *ti = TypeInt::POS) |
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298 : LoadINode(c, mem, adr, TypeAryPtr::RANGE, ti, MemNode::unordered) {} |
0 | 299 virtual int Opcode() const; |
300 virtual const Type *Value( PhaseTransform *phase ) const; | |
301 virtual Node *Identity( PhaseTransform *phase ); | |
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302 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); |
0 | 303 }; |
304 | |
305 //------------------------------LoadLNode-------------------------------------- | |
306 // Load a long from memory | |
307 class LoadLNode : public LoadNode { | |
308 virtual uint hash() const { return LoadNode::hash() + _require_atomic_access; } | |
309 virtual uint cmp( const Node &n ) const { | |
310 return _require_atomic_access == ((LoadLNode&)n)._require_atomic_access | |
311 && LoadNode::cmp(n); | |
312 } | |
313 virtual uint size_of() const { return sizeof(*this); } | |
314 const bool _require_atomic_access; // is piecewise load forbidden? | |
315 | |
316 public: | |
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317 LoadLNode(Node *c, Node *mem, Node *adr, const TypePtr* at, const TypeLong *tl, |
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318 MemOrd mo, bool require_atomic_access = false) |
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319 : LoadNode(c, mem, adr, at, tl, mo), _require_atomic_access(require_atomic_access) {} |
0 | 320 virtual int Opcode() const; |
321 virtual uint ideal_reg() const { return Op_RegL; } | |
322 virtual int store_Opcode() const { return Op_StoreL; } | |
323 virtual BasicType memory_type() const { return T_LONG; } | |
324 bool require_atomic_access() { return _require_atomic_access; } | |
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325 static LoadLNode* make_atomic(Compile *C, Node* ctl, Node* mem, Node* adr, const TypePtr* adr_type, |
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326 const Type* rt, MemOrd mo); |
0 | 327 #ifndef PRODUCT |
328 virtual void dump_spec(outputStream *st) const { | |
329 LoadNode::dump_spec(st); | |
330 if (_require_atomic_access) st->print(" Atomic!"); | |
331 } | |
332 #endif | |
333 }; | |
334 | |
335 //------------------------------LoadL_unalignedNode---------------------------- | |
336 // Load a long from unaligned memory | |
337 class LoadL_unalignedNode : public LoadLNode { | |
338 public: | |
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339 LoadL_unalignedNode(Node *c, Node *mem, Node *adr, const TypePtr* at, MemOrd mo) |
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340 : LoadLNode(c, mem, adr, at, TypeLong::LONG, mo) {} |
0 | 341 virtual int Opcode() const; |
342 }; | |
343 | |
344 //------------------------------LoadFNode-------------------------------------- | |
345 // Load a float (64 bits) from memory | |
346 class LoadFNode : public LoadNode { | |
347 public: | |
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348 LoadFNode(Node *c, Node *mem, Node *adr, const TypePtr* at, const Type *t, MemOrd mo) |
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349 : LoadNode(c, mem, adr, at, t, mo) {} |
0 | 350 virtual int Opcode() const; |
351 virtual uint ideal_reg() const { return Op_RegF; } | |
352 virtual int store_Opcode() const { return Op_StoreF; } | |
353 virtual BasicType memory_type() const { return T_FLOAT; } | |
354 }; | |
355 | |
356 //------------------------------LoadDNode-------------------------------------- | |
357 // Load a double (64 bits) from memory | |
358 class LoadDNode : public LoadNode { | |
359 public: | |
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360 LoadDNode(Node *c, Node *mem, Node *adr, const TypePtr* at, const Type *t, MemOrd mo) |
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361 : LoadNode(c, mem, adr, at, t, mo) {} |
0 | 362 virtual int Opcode() const; |
363 virtual uint ideal_reg() const { return Op_RegD; } | |
364 virtual int store_Opcode() const { return Op_StoreD; } | |
365 virtual BasicType memory_type() const { return T_DOUBLE; } | |
366 }; | |
367 | |
368 //------------------------------LoadD_unalignedNode---------------------------- | |
369 // Load a double from unaligned memory | |
370 class LoadD_unalignedNode : public LoadDNode { | |
371 public: | |
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372 LoadD_unalignedNode(Node *c, Node *mem, Node *adr, const TypePtr* at, MemOrd mo) |
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373 : LoadDNode(c, mem, adr, at, Type::DOUBLE, mo) {} |
0 | 374 virtual int Opcode() const; |
375 }; | |
376 | |
377 //------------------------------LoadPNode-------------------------------------- | |
378 // Load a pointer from memory (either object or array) | |
379 class LoadPNode : public LoadNode { | |
380 public: | |
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381 LoadPNode(Node *c, Node *mem, Node *adr, const TypePtr *at, const TypePtr* t, MemOrd mo) |
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382 : LoadNode(c, mem, adr, at, t, mo) {} |
0 | 383 virtual int Opcode() const; |
384 virtual uint ideal_reg() const { return Op_RegP; } | |
385 virtual int store_Opcode() const { return Op_StoreP; } | |
386 virtual BasicType memory_type() const { return T_ADDRESS; } | |
387 // depends_only_on_test is almost always true, and needs to be almost always | |
388 // true to enable key hoisting & commoning optimizations. However, for the | |
389 // special case of RawPtr loads from TLS top & end, the control edge carries | |
390 // the dependence preventing hoisting past a Safepoint instead of the memory | |
391 // edge. (An unfortunate consequence of having Safepoints not set Raw | |
392 // Memory; itself an unfortunate consequence of having Nodes which produce | |
393 // results (new raw memory state) inside of loops preventing all manner of | |
394 // other optimizations). Basically, it's ugly but so is the alternative. | |
395 // See comment in macro.cpp, around line 125 expand_allocate_common(). | |
396 virtual bool depends_only_on_test() const { return adr_type() != TypeRawPtr::BOTTOM; } | |
397 }; | |
398 | |
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399 |
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400 //------------------------------LoadNNode-------------------------------------- |
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401 // Load a narrow oop from memory (either object or array) |
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402 class LoadNNode : public LoadNode { |
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403 public: |
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404 LoadNNode(Node *c, Node *mem, Node *adr, const TypePtr *at, const Type* t, MemOrd mo) |
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405 : LoadNode(c, mem, adr, at, t, mo) {} |
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406 virtual int Opcode() const; |
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407 virtual uint ideal_reg() const { return Op_RegN; } |
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408 virtual int store_Opcode() const { return Op_StoreN; } |
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409 virtual BasicType memory_type() const { return T_NARROWOOP; } |
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410 // depends_only_on_test is almost always true, and needs to be almost always |
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411 // true to enable key hoisting & commoning optimizations. However, for the |
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412 // special case of RawPtr loads from TLS top & end, the control edge carries |
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413 // the dependence preventing hoisting past a Safepoint instead of the memory |
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414 // edge. (An unfortunate consequence of having Safepoints not set Raw |
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415 // Memory; itself an unfortunate consequence of having Nodes which produce |
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416 // results (new raw memory state) inside of loops preventing all manner of |
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417 // other optimizations). Basically, it's ugly but so is the alternative. |
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418 // See comment in macro.cpp, around line 125 expand_allocate_common(). |
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419 virtual bool depends_only_on_test() const { return adr_type() != TypeRawPtr::BOTTOM; } |
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420 }; |
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421 |
0 | 422 //------------------------------LoadKlassNode---------------------------------- |
423 // Load a Klass from an object | |
424 class LoadKlassNode : public LoadPNode { | |
425 public: | |
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426 LoadKlassNode(Node *c, Node *mem, Node *adr, const TypePtr *at, const TypeKlassPtr *tk, MemOrd mo) |
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427 : LoadPNode(c, mem, adr, at, tk, mo) {} |
0 | 428 virtual int Opcode() const; |
429 virtual const Type *Value( PhaseTransform *phase ) const; | |
430 virtual Node *Identity( PhaseTransform *phase ); | |
431 virtual bool depends_only_on_test() const { return true; } | |
164
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432 |
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433 // Polymorphic factory method: |
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434 static Node* make( PhaseGVN& gvn, Node *mem, Node *adr, const TypePtr* at, |
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435 const TypeKlassPtr *tk = TypeKlassPtr::OBJECT ); |
0 | 436 }; |
437 | |
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438 //------------------------------LoadNKlassNode--------------------------------- |
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439 // Load a narrow Klass from an object. |
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440 class LoadNKlassNode : public LoadNNode { |
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441 public: |
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442 LoadNKlassNode(Node *c, Node *mem, Node *adr, const TypePtr *at, const TypeNarrowKlass *tk, MemOrd mo) |
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443 : LoadNNode(c, mem, adr, at, tk, mo) {} |
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444 virtual int Opcode() const; |
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445 virtual uint ideal_reg() const { return Op_RegN; } |
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446 virtual int store_Opcode() const { return Op_StoreNKlass; } |
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447 virtual BasicType memory_type() const { return T_NARROWKLASS; } |
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448 |
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449 virtual const Type *Value( PhaseTransform *phase ) const; |
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450 virtual Node *Identity( PhaseTransform *phase ); |
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451 virtual bool depends_only_on_test() const { return true; } |
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452 }; |
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453 |
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454 |
0 | 455 //------------------------------StoreNode-------------------------------------- |
456 // Store value; requires Store, Address and Value | |
457 class StoreNode : public MemNode { | |
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458 private: |
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459 // On platforms with weak memory ordering (e.g., PPC, Ia64) we distinguish |
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460 // stores that can be reordered, and such requiring release semantics to |
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461 // adhere to the Java specification. The required behaviour is stored in |
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462 // this field. |
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463 const MemOrd _mo; |
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464 // Needed for proper cloning. |
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465 virtual uint size_of() const { return sizeof(*this); } |
0 | 466 protected: |
467 virtual uint cmp( const Node &n ) const; | |
468 virtual bool depends_only_on_test() const { return false; } | |
469 | |
470 Node *Ideal_masked_input (PhaseGVN *phase, uint mask); | |
471 Node *Ideal_sign_extended_input(PhaseGVN *phase, int num_bits); | |
472 | |
473 public: | |
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474 // We must ensure that stores of object references will be visible |
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475 // only after the object's initialization. So the callers of this |
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476 // procedure must indicate that the store requires `release' |
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477 // semantics, if the stored value is an object reference that might |
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478 // point to a new object and may become externally visible. |
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479 StoreNode(Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val, MemOrd mo) |
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480 : MemNode(c, mem, adr, at, val), _mo(mo) { |
0 | 481 init_class_id(Class_Store); |
482 } | |
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483 StoreNode(Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val, Node *oop_store, MemOrd mo) |
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484 : MemNode(c, mem, adr, at, val, oop_store), _mo(mo) { |
0 | 485 init_class_id(Class_Store); |
486 } | |
487 | |
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488 inline bool is_unordered() const { return !is_release(); } |
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489 inline bool is_release() const { |
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490 assert((_mo == unordered || _mo == release), "unexpected"); |
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491 return _mo == release; |
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492 } |
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493 |
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494 // Conservatively release stores of object references in order to |
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495 // ensure visibility of object initialization. |
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496 static inline MemOrd release_if_reference(const BasicType t) { |
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497 const MemOrd mo = (t == T_ARRAY || |
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498 t == T_ADDRESS || // Might be the address of an object reference (`boxing'). |
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499 t == T_OBJECT) ? release : unordered; |
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500 return mo; |
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501 } |
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502 |
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503 // Polymorphic factory method |
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504 // |
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505 // We must ensure that stores of object references will be visible |
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506 // only after the object's initialization. So the callers of this |
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507 // procedure must indicate that the store requires `release' |
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508 // semantics, if the stored value is an object reference that might |
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509 // point to a new object and may become externally visible. |
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510 static StoreNode* make(PhaseGVN& gvn, Node *c, Node *mem, Node *adr, |
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511 const TypePtr* at, Node *val, BasicType bt, MemOrd mo); |
0 | 512 |
513 virtual uint hash() const; // Check the type | |
514 | |
515 // If the store is to Field memory and the pointer is non-null, we can | |
516 // zero out the control input. | |
517 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
518 | |
519 // Compute a new Type for this node. Basically we just do the pre-check, | |
520 // then call the virtual add() to set the type. | |
521 virtual const Type *Value( PhaseTransform *phase ) const; | |
522 | |
523 // Check for identity function on memory (Load then Store at same address) | |
524 virtual Node *Identity( PhaseTransform *phase ); | |
525 | |
526 // Do not match memory edge | |
527 virtual uint match_edge(uint idx) const; | |
528 | |
529 virtual const Type *bottom_type() const; // returns Type::MEMORY | |
530 | |
531 // Map a store opcode to its corresponding own opcode, trivially. | |
532 virtual int store_Opcode() const { return Opcode(); } | |
533 | |
534 // have all possible loads of the value stored been optimized away? | |
535 bool value_never_loaded(PhaseTransform *phase) const; | |
536 }; | |
537 | |
538 //------------------------------StoreBNode------------------------------------- | |
539 // Store byte to memory | |
540 class StoreBNode : public StoreNode { | |
541 public: | |
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542 StoreBNode(Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val, MemOrd mo) |
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543 : StoreNode(c, mem, adr, at, val, mo) {} |
0 | 544 virtual int Opcode() const; |
545 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
546 virtual BasicType memory_type() const { return T_BYTE; } | |
547 }; | |
548 | |
549 //------------------------------StoreCNode------------------------------------- | |
550 // Store char/short to memory | |
551 class StoreCNode : public StoreNode { | |
552 public: | |
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553 StoreCNode(Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val, MemOrd mo) |
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554 : StoreNode(c, mem, adr, at, val, mo) {} |
0 | 555 virtual int Opcode() const; |
556 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
557 virtual BasicType memory_type() const { return T_CHAR; } | |
558 }; | |
559 | |
560 //------------------------------StoreINode------------------------------------- | |
561 // Store int to memory | |
562 class StoreINode : public StoreNode { | |
563 public: | |
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564 StoreINode(Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val, MemOrd mo) |
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565 : StoreNode(c, mem, adr, at, val, mo) {} |
0 | 566 virtual int Opcode() const; |
567 virtual BasicType memory_type() const { return T_INT; } | |
568 }; | |
569 | |
570 //------------------------------StoreLNode------------------------------------- | |
571 // Store long to memory | |
572 class StoreLNode : public StoreNode { | |
573 virtual uint hash() const { return StoreNode::hash() + _require_atomic_access; } | |
574 virtual uint cmp( const Node &n ) const { | |
575 return _require_atomic_access == ((StoreLNode&)n)._require_atomic_access | |
576 && StoreNode::cmp(n); | |
577 } | |
578 virtual uint size_of() const { return sizeof(*this); } | |
579 const bool _require_atomic_access; // is piecewise store forbidden? | |
580 | |
581 public: | |
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582 StoreLNode(Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val, MemOrd mo, bool require_atomic_access = false) |
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583 : StoreNode(c, mem, adr, at, val, mo), _require_atomic_access(require_atomic_access) {} |
0 | 584 virtual int Opcode() const; |
585 virtual BasicType memory_type() const { return T_LONG; } | |
586 bool require_atomic_access() { return _require_atomic_access; } | |
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587 static StoreLNode* make_atomic(Compile *C, Node* ctl, Node* mem, Node* adr, const TypePtr* adr_type, Node* val, MemOrd mo); |
0 | 588 #ifndef PRODUCT |
589 virtual void dump_spec(outputStream *st) const { | |
590 StoreNode::dump_spec(st); | |
591 if (_require_atomic_access) st->print(" Atomic!"); | |
592 } | |
593 #endif | |
594 }; | |
595 | |
596 //------------------------------StoreFNode------------------------------------- | |
597 // Store float to memory | |
598 class StoreFNode : public StoreNode { | |
599 public: | |
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600 StoreFNode(Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val, MemOrd mo) |
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601 : StoreNode(c, mem, adr, at, val, mo) {} |
0 | 602 virtual int Opcode() const; |
603 virtual BasicType memory_type() const { return T_FLOAT; } | |
604 }; | |
605 | |
606 //------------------------------StoreDNode------------------------------------- | |
607 // Store double to memory | |
608 class StoreDNode : public StoreNode { | |
609 public: | |
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610 StoreDNode(Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val, MemOrd mo) |
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611 : StoreNode(c, mem, adr, at, val, mo) {} |
0 | 612 virtual int Opcode() const; |
613 virtual BasicType memory_type() const { return T_DOUBLE; } | |
614 }; | |
615 | |
616 //------------------------------StorePNode------------------------------------- | |
617 // Store pointer to memory | |
618 class StorePNode : public StoreNode { | |
619 public: | |
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620 StorePNode(Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val, MemOrd mo) |
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621 : StoreNode(c, mem, adr, at, val, mo) {} |
0 | 622 virtual int Opcode() const; |
623 virtual BasicType memory_type() const { return T_ADDRESS; } | |
624 }; | |
625 | |
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626 //------------------------------StoreNNode------------------------------------- |
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627 // Store narrow oop to memory |
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628 class StoreNNode : public StoreNode { |
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629 public: |
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630 StoreNNode(Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val, MemOrd mo) |
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631 : StoreNode(c, mem, adr, at, val, mo) {} |
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632 virtual int Opcode() const; |
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633 virtual BasicType memory_type() const { return T_NARROWOOP; } |
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634 }; |
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635 |
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636 //------------------------------StoreNKlassNode-------------------------------------- |
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637 // Store narrow klass to memory |
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638 class StoreNKlassNode : public StoreNNode { |
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639 public: |
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640 StoreNKlassNode(Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val, MemOrd mo) |
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641 : StoreNNode(c, mem, adr, at, val, mo) {} |
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642 virtual int Opcode() const; |
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643 virtual BasicType memory_type() const { return T_NARROWKLASS; } |
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644 }; |
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645 |
0 | 646 //------------------------------StoreCMNode----------------------------------- |
647 // Store card-mark byte to memory for CM | |
648 // The last StoreCM before a SafePoint must be preserved and occur after its "oop" store | |
649 // Preceeding equivalent StoreCMs may be eliminated. | |
650 class StoreCMNode : public StoreNode { | |
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651 private: |
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652 virtual uint hash() const { return StoreNode::hash() + _oop_alias_idx; } |
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653 virtual uint cmp( const Node &n ) const { |
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654 return _oop_alias_idx == ((StoreCMNode&)n)._oop_alias_idx |
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655 && StoreNode::cmp(n); |
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656 } |
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657 virtual uint size_of() const { return sizeof(*this); } |
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658 int _oop_alias_idx; // The alias_idx of OopStore |
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659 |
0 | 660 public: |
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661 StoreCMNode( Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val, Node *oop_store, int oop_alias_idx ) : |
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662 StoreNode(c, mem, adr, at, val, oop_store, MemNode::release), |
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663 _oop_alias_idx(oop_alias_idx) { |
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664 assert(_oop_alias_idx >= Compile::AliasIdxRaw || |
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665 _oop_alias_idx == Compile::AliasIdxBot && Compile::current()->AliasLevel() == 0, |
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666 "bad oop alias idx"); |
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667 } |
0 | 668 virtual int Opcode() const; |
669 virtual Node *Identity( PhaseTransform *phase ); | |
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670 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); |
0 | 671 virtual const Type *Value( PhaseTransform *phase ) const; |
672 virtual BasicType memory_type() const { return T_VOID; } // unspecific | |
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673 int oop_alias_idx() const { return _oop_alias_idx; } |
0 | 674 }; |
675 | |
676 //------------------------------LoadPLockedNode--------------------------------- | |
677 // Load-locked a pointer from memory (either object or array). | |
678 // On Sparc & Intel this is implemented as a normal pointer load. | |
679 // On PowerPC and friends it's a real load-locked. | |
680 class LoadPLockedNode : public LoadPNode { | |
681 public: | |
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682 LoadPLockedNode(Node *c, Node *mem, Node *adr, MemOrd mo) |
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683 : LoadPNode(c, mem, adr, TypeRawPtr::BOTTOM, TypeRawPtr::BOTTOM, mo) {} |
0 | 684 virtual int Opcode() const; |
685 virtual int store_Opcode() const { return Op_StorePConditional; } | |
686 virtual bool depends_only_on_test() const { return true; } | |
687 }; | |
688 | |
689 //------------------------------SCMemProjNode--------------------------------------- | |
690 // This class defines a projection of the memory state of a store conditional node. | |
691 // These nodes return a value, but also update memory. | |
692 class SCMemProjNode : public ProjNode { | |
693 public: | |
694 enum {SCMEMPROJCON = (uint)-2}; | |
695 SCMemProjNode( Node *src) : ProjNode( src, SCMEMPROJCON) { } | |
696 virtual int Opcode() const; | |
697 virtual bool is_CFG() const { return false; } | |
698 virtual const Type *bottom_type() const {return Type::MEMORY;} | |
699 virtual const TypePtr *adr_type() const { return in(0)->in(MemNode::Memory)->adr_type();} | |
700 virtual uint ideal_reg() const { return 0;} // memory projections don't have a register | |
701 virtual const Type *Value( PhaseTransform *phase ) const; | |
702 #ifndef PRODUCT | |
703 virtual void dump_spec(outputStream *st) const {}; | |
704 #endif | |
705 }; | |
706 | |
707 //------------------------------LoadStoreNode--------------------------- | |
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708 // Note: is_Mem() method returns 'true' for this class. |
0 | 709 class LoadStoreNode : public Node { |
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710 private: |
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711 const Type* const _type; // What kind of value is loaded? |
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712 const TypePtr* _adr_type; // What kind of memory is being addressed? |
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713 virtual uint size_of() const; // Size is bigger |
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714 public: |
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715 LoadStoreNode( Node *c, Node *mem, Node *adr, Node *val, const TypePtr* at, const Type* rt, uint required ); |
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716 virtual bool depends_only_on_test() const { return false; } |
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717 virtual uint match_edge(uint idx) const { return idx == MemNode::Address || idx == MemNode::ValueIn; } |
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718 |
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719 virtual const Type *bottom_type() const { return _type; } |
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720 virtual uint ideal_reg() const; |
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721 virtual const class TypePtr *adr_type() const { return _adr_type; } // returns bottom_type of address |
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722 |
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723 bool result_not_used() const; |
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724 }; |
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725 |
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726 class LoadStoreConditionalNode : public LoadStoreNode { |
0 | 727 public: |
728 enum { | |
729 ExpectedIn = MemNode::ValueIn+1 // One more input than MemNode | |
730 }; | |
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731 LoadStoreConditionalNode(Node *c, Node *mem, Node *adr, Node *val, Node *ex); |
0 | 732 }; |
733 | |
734 //------------------------------StorePConditionalNode--------------------------- | |
735 // Conditionally store pointer to memory, if no change since prior | |
736 // load-locked. Sets flags for success or failure of the store. | |
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737 class StorePConditionalNode : public LoadStoreConditionalNode { |
0 | 738 public: |
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739 StorePConditionalNode( Node *c, Node *mem, Node *adr, Node *val, Node *ll ) : LoadStoreConditionalNode(c, mem, adr, val, ll) { } |
0 | 740 virtual int Opcode() const; |
741 // Produces flags | |
742 virtual uint ideal_reg() const { return Op_RegFlags; } | |
743 }; | |
744 | |
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745 //------------------------------StoreIConditionalNode--------------------------- |
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746 // Conditionally store int to memory, if no change since prior |
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747 // load-locked. Sets flags for success or failure of the store. |
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748 class StoreIConditionalNode : public LoadStoreConditionalNode { |
420
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749 public: |
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750 StoreIConditionalNode( Node *c, Node *mem, Node *adr, Node *val, Node *ii ) : LoadStoreConditionalNode(c, mem, adr, val, ii) { } |
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751 virtual int Opcode() const; |
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752 // Produces flags |
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753 virtual uint ideal_reg() const { return Op_RegFlags; } |
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754 }; |
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755 |
0 | 756 //------------------------------StoreLConditionalNode--------------------------- |
757 // Conditionally store long to memory, if no change since prior | |
758 // load-locked. Sets flags for success or failure of the store. | |
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759 class StoreLConditionalNode : public LoadStoreConditionalNode { |
0 | 760 public: |
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761 StoreLConditionalNode( Node *c, Node *mem, Node *adr, Node *val, Node *ll ) : LoadStoreConditionalNode(c, mem, adr, val, ll) { } |
0 | 762 virtual int Opcode() const; |
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763 // Produces flags |
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764 virtual uint ideal_reg() const { return Op_RegFlags; } |
0 | 765 }; |
766 | |
767 | |
768 //------------------------------CompareAndSwapLNode--------------------------- | |
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769 class CompareAndSwapLNode : public LoadStoreConditionalNode { |
0 | 770 public: |
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771 CompareAndSwapLNode( Node *c, Node *mem, Node *adr, Node *val, Node *ex) : LoadStoreConditionalNode(c, mem, adr, val, ex) { } |
0 | 772 virtual int Opcode() const; |
773 }; | |
774 | |
775 | |
776 //------------------------------CompareAndSwapINode--------------------------- | |
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777 class CompareAndSwapINode : public LoadStoreConditionalNode { |
0 | 778 public: |
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779 CompareAndSwapINode( Node *c, Node *mem, Node *adr, Node *val, Node *ex) : LoadStoreConditionalNode(c, mem, adr, val, ex) { } |
0 | 780 virtual int Opcode() const; |
781 }; | |
782 | |
783 | |
784 //------------------------------CompareAndSwapPNode--------------------------- | |
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785 class CompareAndSwapPNode : public LoadStoreConditionalNode { |
0 | 786 public: |
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787 CompareAndSwapPNode( Node *c, Node *mem, Node *adr, Node *val, Node *ex) : LoadStoreConditionalNode(c, mem, adr, val, ex) { } |
0 | 788 virtual int Opcode() const; |
789 }; | |
790 | |
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791 //------------------------------CompareAndSwapNNode--------------------------- |
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792 class CompareAndSwapNNode : public LoadStoreConditionalNode { |
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793 public: |
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794 CompareAndSwapNNode( Node *c, Node *mem, Node *adr, Node *val, Node *ex) : LoadStoreConditionalNode(c, mem, adr, val, ex) { } |
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795 virtual int Opcode() const; |
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796 }; |
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797 |
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798 //------------------------------GetAndAddINode--------------------------- |
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799 class GetAndAddINode : public LoadStoreNode { |
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800 public: |
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801 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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802 virtual int Opcode() const; |
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803 }; |
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804 |
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805 //------------------------------GetAndAddLNode--------------------------- |
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806 class GetAndAddLNode : public LoadStoreNode { |
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807 public: |
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808 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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809 virtual int Opcode() const; |
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810 }; |
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811 |
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812 |
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813 //------------------------------GetAndSetINode--------------------------- |
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814 class GetAndSetINode : public LoadStoreNode { |
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815 public: |
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816 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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817 virtual int Opcode() const; |
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818 }; |
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819 |
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820 //------------------------------GetAndSetINode--------------------------- |
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821 class GetAndSetLNode : public LoadStoreNode { |
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822 public: |
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823 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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824 virtual int Opcode() const; |
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825 }; |
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826 |
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827 //------------------------------GetAndSetPNode--------------------------- |
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828 class GetAndSetPNode : public LoadStoreNode { |
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829 public: |
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830 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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831 virtual int Opcode() const; |
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832 }; |
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833 |
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834 //------------------------------GetAndSetNNode--------------------------- |
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835 class GetAndSetNNode : public LoadStoreNode { |
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836 public: |
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837 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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838 virtual int Opcode() const; |
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839 }; |
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840 |
0 | 841 //------------------------------ClearArray------------------------------------- |
842 class ClearArrayNode: public Node { | |
843 public: | |
1100
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844 ClearArrayNode( Node *ctrl, Node *arymem, Node *word_cnt, Node *base ) |
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845 : Node(ctrl,arymem,word_cnt,base) { |
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846 init_class_id(Class_ClearArray); |
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847 } |
0 | 848 virtual int Opcode() const; |
849 virtual const Type *bottom_type() const { return Type::MEMORY; } | |
850 // ClearArray modifies array elements, and so affects only the | |
851 // array memory addressed by the bottom_type of its base address. | |
852 virtual const class TypePtr *adr_type() const; | |
853 virtual Node *Identity( PhaseTransform *phase ); | |
854 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
855 virtual uint match_edge(uint idx) const; | |
856 | |
857 // Clear the given area of an object or array. | |
858 // The start offset must always be aligned mod BytesPerInt. | |
859 // The end offset must always be aligned mod BytesPerLong. | |
860 // Return the new memory. | |
861 static Node* clear_memory(Node* control, Node* mem, Node* dest, | |
862 intptr_t start_offset, | |
863 intptr_t end_offset, | |
864 PhaseGVN* phase); | |
865 static Node* clear_memory(Node* control, Node* mem, Node* dest, | |
866 intptr_t start_offset, | |
867 Node* end_offset, | |
868 PhaseGVN* phase); | |
869 static Node* clear_memory(Node* control, Node* mem, Node* dest, | |
870 Node* start_offset, | |
871 Node* end_offset, | |
872 PhaseGVN* phase); | |
1100
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873 // Return allocation input memory edge if it is different instance |
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874 // or itself if it is the one we are looking for. |
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875 static bool step_through(Node** np, uint instance_id, PhaseTransform* phase); |
0 | 876 }; |
877 | |
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878 //------------------------------StrIntrinsic------------------------------- |
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879 // Base class for Ideal nodes used in String instrinsic code. |
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880 class StrIntrinsicNode: public Node { |
0 | 881 public: |
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882 StrIntrinsicNode(Node* control, Node* char_array_mem, |
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883 Node* s1, Node* c1, Node* s2, Node* c2): |
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884 Node(control, char_array_mem, s1, c1, s2, c2) { |
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885 } |
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886 |
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887 StrIntrinsicNode(Node* control, Node* char_array_mem, |
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888 Node* s1, Node* s2, Node* c): |
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889 Node(control, char_array_mem, s1, s2, c) { |
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890 } |
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891 |
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892 StrIntrinsicNode(Node* control, Node* char_array_mem, |
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893 Node* s1, Node* s2): |
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894 Node(control, char_array_mem, s1, s2) { |
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895 } |
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896 |
0 | 897 virtual bool depends_only_on_test() const { return false; } |
986
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898 virtual const TypePtr* adr_type() const { return TypeAryPtr::CHARS; } |
0 | 899 virtual uint match_edge(uint idx) const; |
900 virtual uint ideal_reg() const { return Op_RegI; } | |
901 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
4115 | 902 virtual const Type *Value(PhaseTransform *phase) const; |
0 | 903 }; |
904 | |
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905 //------------------------------StrComp------------------------------------- |
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906 class StrCompNode: public StrIntrinsicNode { |
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907 public: |
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908 StrCompNode(Node* control, Node* char_array_mem, |
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909 Node* s1, Node* c1, Node* s2, Node* c2): |
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910 StrIntrinsicNode(control, char_array_mem, s1, c1, s2, c2) {}; |
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911 virtual int Opcode() const; |
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912 virtual const Type* bottom_type() const { return TypeInt::INT; } |
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913 }; |
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914 |
681 | 915 //------------------------------StrEquals------------------------------------- |
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916 class StrEqualsNode: public StrIntrinsicNode { |
681 | 917 public: |
986
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918 StrEqualsNode(Node* control, Node* char_array_mem, |
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919 Node* s1, Node* s2, Node* c): |
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920 StrIntrinsicNode(control, char_array_mem, s1, s2, c) {}; |
681 | 921 virtual int Opcode() const; |
922 virtual const Type* bottom_type() const { return TypeInt::BOOL; } | |
923 }; | |
924 | |
925 //------------------------------StrIndexOf------------------------------------- | |
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926 class StrIndexOfNode: public StrIntrinsicNode { |
681 | 927 public: |
986
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928 StrIndexOfNode(Node* control, Node* char_array_mem, |
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929 Node* s1, Node* c1, Node* s2, Node* c2): |
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930 StrIntrinsicNode(control, char_array_mem, s1, c1, s2, c2) {}; |
681 | 931 virtual int Opcode() const; |
932 virtual const Type* bottom_type() const { return TypeInt::INT; } | |
933 }; | |
934 | |
169
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935 //------------------------------AryEq--------------------------------------- |
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936 class AryEqNode: public StrIntrinsicNode { |
169
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937 public: |
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938 AryEqNode(Node* control, Node* char_array_mem, Node* s1, Node* s2): |
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939 StrIntrinsicNode(control, char_array_mem, s1, s2) {}; |
169
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940 virtual int Opcode() const; |
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941 virtual const Type* bottom_type() const { return TypeInt::BOOL; } |
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942 }; |
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943 |
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944 |
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945 //------------------------------EncodeISOArray-------------------------------- |
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946 // encode char[] to byte[] in ISO_8859_1 |
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947 class EncodeISOArrayNode: public Node { |
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948 public: |
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949 EncodeISOArrayNode(Node *control, Node* arymem, Node* s1, Node* s2, Node* c): Node(control, arymem, s1, s2, c) {}; |
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950 virtual int Opcode() const; |
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951 virtual bool depends_only_on_test() const { return false; } |
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952 virtual const Type* bottom_type() const { return TypeInt::INT; } |
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953 virtual const TypePtr* adr_type() const { return TypePtr::BOTTOM; } |
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954 virtual uint match_edge(uint idx) const; |
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955 virtual uint ideal_reg() const { return Op_RegI; } |
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956 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); |
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957 virtual const Type *Value(PhaseTransform *phase) const; |
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958 }; |
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959 |
0 | 960 //------------------------------MemBar----------------------------------------- |
961 // There are different flavors of Memory Barriers to match the Java Memory | |
962 // Model. Monitor-enter and volatile-load act as Aquires: no following ref | |
963 // can be moved to before them. We insert a MemBar-Acquire after a FastLock or | |
964 // volatile-load. Monitor-exit and volatile-store act as Release: no | |
605 | 965 // preceding ref can be moved to after them. We insert a MemBar-Release |
0 | 966 // before a FastUnlock or volatile-store. All volatiles need to be |
967 // serialized, so we follow all volatile-stores with a MemBar-Volatile to | |
605 | 968 // separate it from any following volatile-load. |
0 | 969 class MemBarNode: public MultiNode { |
970 virtual uint hash() const ; // { return NO_HASH; } | |
971 virtual uint cmp( const Node &n ) const ; // Always fail, except on self | |
972 | |
973 virtual uint size_of() const { return sizeof(*this); } | |
974 // Memory type this node is serializing. Usually either rawptr or bottom. | |
975 const TypePtr* _adr_type; | |
976 | |
977 public: | |
978 enum { | |
979 Precedent = TypeFunc::Parms // optional edge to force precedence | |
980 }; | |
981 MemBarNode(Compile* C, int alias_idx, Node* precedent); | |
982 virtual int Opcode() const = 0; | |
983 virtual const class TypePtr *adr_type() const { return _adr_type; } | |
984 virtual const Type *Value( PhaseTransform *phase ) const; | |
985 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
986 virtual uint match_edge(uint idx) const { return 0; } | |
987 virtual const Type *bottom_type() const { return TypeTuple::MEMBAR; } | |
988 virtual Node *match( const ProjNode *proj, const Matcher *m ); | |
989 // Factory method. Builds a wide or narrow membar. | |
990 // Optional 'precedent' becomes an extra edge if not null. | |
991 static MemBarNode* make(Compile* C, int opcode, | |
992 int alias_idx = Compile::AliasIdxBot, | |
993 Node* precedent = NULL); | |
994 }; | |
995 | |
996 // "Acquire" - no following ref can move before (but earlier refs can | |
997 // follow, like an early Load stalled in cache). Requires multi-cpu | |
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998 // visibility. Inserted after a volatile load. |
0 | 999 class MemBarAcquireNode: public MemBarNode { |
1000 public: | |
1001 MemBarAcquireNode(Compile* C, int alias_idx, Node* precedent) | |
1002 : MemBarNode(C, alias_idx, precedent) {} | |
1003 virtual int Opcode() const; | |
1004 }; | |
1005 | |
1006 // "Release" - no earlier ref can move after (but later refs can move | |
1007 // up, like a speculative pipelined cache-hitting Load). Requires | |
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1008 // multi-cpu visibility. Inserted before a volatile store. |
0 | 1009 class MemBarReleaseNode: public MemBarNode { |
1010 public: | |
1011 MemBarReleaseNode(Compile* C, int alias_idx, Node* precedent) | |
1012 : MemBarNode(C, alias_idx, precedent) {} | |
1013 virtual int Opcode() const; | |
1014 }; | |
1015 | |
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1016 // "Acquire" - no following ref can move before (but earlier refs can |
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1017 // follow, like an early Load stalled in cache). Requires multi-cpu |
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1018 // visibility. Inserted after a FastLock. |
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1019 class MemBarAcquireLockNode: public MemBarNode { |
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1020 public: |
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1021 MemBarAcquireLockNode(Compile* C, int alias_idx, Node* precedent) |
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1022 : MemBarNode(C, alias_idx, precedent) {} |
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1023 virtual int Opcode() const; |
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1024 }; |
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1025 |
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1026 // "Release" - no earlier ref can move after (but later refs can move |
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1027 // up, like a speculative pipelined cache-hitting Load). Requires |
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1028 // multi-cpu visibility. Inserted before a FastUnLock. |
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1029 class MemBarReleaseLockNode: public MemBarNode { |
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1030 public: |
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1031 MemBarReleaseLockNode(Compile* C, int alias_idx, Node* precedent) |
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1032 : MemBarNode(C, alias_idx, precedent) {} |
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1033 virtual int Opcode() const; |
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1034 }; |
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1035 |
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1036 class MemBarStoreStoreNode: public MemBarNode { |
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1037 public: |
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1038 MemBarStoreStoreNode(Compile* C, int alias_idx, Node* precedent) |
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1039 : MemBarNode(C, alias_idx, precedent) { |
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1040 init_class_id(Class_MemBarStoreStore); |
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1041 } |
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1042 virtual int Opcode() const; |
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1043 }; |
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1044 |
0 | 1045 // Ordering between a volatile store and a following volatile load. |
1046 // Requires multi-CPU visibility? | |
1047 class MemBarVolatileNode: public MemBarNode { | |
1048 public: | |
1049 MemBarVolatileNode(Compile* C, int alias_idx, Node* precedent) | |
1050 : MemBarNode(C, alias_idx, precedent) {} | |
1051 virtual int Opcode() const; | |
1052 }; | |
1053 | |
1054 // Ordering within the same CPU. Used to order unsafe memory references | |
1055 // inside the compiler when we lack alias info. Not needed "outside" the | |
1056 // compiler because the CPU does all the ordering for us. | |
1057 class MemBarCPUOrderNode: public MemBarNode { | |
1058 public: | |
1059 MemBarCPUOrderNode(Compile* C, int alias_idx, Node* precedent) | |
1060 : MemBarNode(C, alias_idx, precedent) {} | |
1061 virtual int Opcode() const; | |
1062 virtual uint ideal_reg() const { return 0; } // not matched in the AD file | |
1063 }; | |
1064 | |
1065 // Isolation of object setup after an AllocateNode and before next safepoint. | |
1066 // (See comment in memnode.cpp near InitializeNode::InitializeNode for semantics.) | |
1067 class InitializeNode: public MemBarNode { | |
1068 friend class AllocateNode; | |
1069 | |
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1070 enum { |
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1071 Incomplete = 0, |
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1072 Complete = 1, |
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1073 WithArraycopy = 2 |
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1074 }; |
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1075 int _is_complete; |
0 | 1076 |
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1077 bool _does_not_escape; |
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1078 |
0 | 1079 public: |
1080 enum { | |
1081 Control = TypeFunc::Control, | |
1082 Memory = TypeFunc::Memory, // MergeMem for states affected by this op | |
1083 RawAddress = TypeFunc::Parms+0, // the newly-allocated raw address | |
1084 RawStores = TypeFunc::Parms+1 // zero or more stores (or TOP) | |
1085 }; | |
1086 | |
1087 InitializeNode(Compile* C, int adr_type, Node* rawoop); | |
1088 virtual int Opcode() const; | |
1089 virtual uint size_of() const { return sizeof(*this); } | |
1090 virtual uint ideal_reg() const { return 0; } // not matched in the AD file | |
1091 virtual const RegMask &in_RegMask(uint) const; // mask for RawAddress | |
1092 | |
1093 // Manage incoming memory edges via a MergeMem on in(Memory): | |
1094 Node* memory(uint alias_idx); | |
1095 | |
1096 // The raw memory edge coming directly from the Allocation. | |
1097 // The contents of this memory are *always* all-zero-bits. | |
1098 Node* zero_memory() { return memory(Compile::AliasIdxRaw); } | |
1099 | |
1100 // Return the corresponding allocation for this initialization (or null if none). | |
1101 // (Note: Both InitializeNode::allocation and AllocateNode::initialization | |
1102 // are defined in graphKit.cpp, which sets up the bidirectional relation.) | |
1103 AllocateNode* allocation(); | |
1104 | |
1105 // Anything other than zeroing in this init? | |
1106 bool is_non_zero(); | |
1107 | |
1108 // An InitializeNode must completed before macro expansion is done. | |
1109 // Completion requires that the AllocateNode must be followed by | |
1110 // initialization of the new memory to zero, then to any initializers. | |
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1111 bool is_complete() { return _is_complete != Incomplete; } |
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1112 bool is_complete_with_arraycopy() { return (_is_complete & WithArraycopy) != 0; } |
0 | 1113 |
1114 // Mark complete. (Must not yet be complete.) | |
1115 void set_complete(PhaseGVN* phase); | |
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1116 void set_complete_with_arraycopy() { _is_complete = Complete | WithArraycopy; } |
0 | 1117 |
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1118 bool does_not_escape() { return _does_not_escape; } |
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1119 void set_does_not_escape() { _does_not_escape = true; } |
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1120 |
0 | 1121 #ifdef ASSERT |
1122 // ensure all non-degenerate stores are ordered and non-overlapping | |
1123 bool stores_are_sane(PhaseTransform* phase); | |
1124 #endif //ASSERT | |
1125 | |
1126 // See if this store can be captured; return offset where it initializes. | |
1127 // Return 0 if the store cannot be moved (any sort of problem). | |
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1128 intptr_t can_capture_store(StoreNode* st, PhaseTransform* phase, bool can_reshape); |
0 | 1129 |
1130 // Capture another store; reformat it to write my internal raw memory. | |
1131 // Return the captured copy, else NULL if there is some sort of problem. | |
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1132 Node* capture_store(StoreNode* st, intptr_t start, PhaseTransform* phase, bool can_reshape); |
0 | 1133 |
1134 // Find captured store which corresponds to the range [start..start+size). | |
1135 // Return my own memory projection (meaning the initial zero bits) | |
1136 // if there is no such store. Return NULL if there is a problem. | |
1137 Node* find_captured_store(intptr_t start, int size_in_bytes, PhaseTransform* phase); | |
1138 | |
1139 // Called when the associated AllocateNode is expanded into CFG. | |
1140 Node* complete_stores(Node* rawctl, Node* rawmem, Node* rawptr, | |
1141 intptr_t header_size, Node* size_in_bytes, | |
1142 PhaseGVN* phase); | |
1143 | |
1144 private: | |
1145 void remove_extra_zeroes(); | |
1146 | |
1147 // Find out where a captured store should be placed (or already is placed). | |
1148 int captured_store_insertion_point(intptr_t start, int size_in_bytes, | |
1149 PhaseTransform* phase); | |
1150 | |
1151 static intptr_t get_store_offset(Node* st, PhaseTransform* phase); | |
1152 | |
1153 Node* make_raw_address(intptr_t offset, PhaseTransform* phase); | |
1154 | |
10278 | 1155 bool detect_init_independence(Node* n, int& count); |
0 | 1156 |
1157 void coalesce_subword_stores(intptr_t header_size, Node* size_in_bytes, | |
1158 PhaseGVN* phase); | |
1159 | |
1160 intptr_t find_next_fullword_store(uint i, PhaseGVN* phase); | |
1161 }; | |
1162 | |
1163 //------------------------------MergeMem--------------------------------------- | |
1164 // (See comment in memnode.cpp near MergeMemNode::MergeMemNode for semantics.) | |
1165 class MergeMemNode: public Node { | |
1166 virtual uint hash() const ; // { return NO_HASH; } | |
1167 virtual uint cmp( const Node &n ) const ; // Always fail, except on self | |
1168 friend class MergeMemStream; | |
1169 MergeMemNode(Node* def); // clients use MergeMemNode::make | |
1170 | |
1171 public: | |
1172 // If the input is a whole memory state, clone it with all its slices intact. | |
1173 // Otherwise, make a new memory state with just that base memory input. | |
1174 // In either case, the result is a newly created MergeMem. | |
1175 static MergeMemNode* make(Compile* C, Node* base_memory); | |
1176 | |
1177 virtual int Opcode() const; | |
1178 virtual Node *Identity( PhaseTransform *phase ); | |
1179 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
1180 virtual uint ideal_reg() const { return NotAMachineReg; } | |
1181 virtual uint match_edge(uint idx) const { return 0; } | |
1182 virtual const RegMask &out_RegMask() const; | |
1183 virtual const Type *bottom_type() const { return Type::MEMORY; } | |
1184 virtual const TypePtr *adr_type() const { return TypePtr::BOTTOM; } | |
1185 // sparse accessors | |
1186 // Fetch the previously stored "set_memory_at", or else the base memory. | |
1187 // (Caller should clone it if it is a phi-nest.) | |
1188 Node* memory_at(uint alias_idx) const; | |
1189 // set the memory, regardless of its previous value | |
1190 void set_memory_at(uint alias_idx, Node* n); | |
1191 // the "base" is the memory that provides the non-finite support | |
1192 Node* base_memory() const { return in(Compile::AliasIdxBot); } | |
1193 // warning: setting the base can implicitly set any of the other slices too | |
1194 void set_base_memory(Node* def); | |
1195 // sentinel value which denotes a copy of the base memory: | |
1196 Node* empty_memory() const { return in(Compile::AliasIdxTop); } | |
1197 static Node* make_empty_memory(); // where the sentinel comes from | |
1198 bool is_empty_memory(Node* n) const { assert((n == empty_memory()) == n->is_top(), "sanity"); return n->is_top(); } | |
1199 // hook for the iterator, to perform any necessary setup | |
1200 void iteration_setup(const MergeMemNode* other = NULL); | |
1201 // push sentinels until I am at least as long as the other (semantic no-op) | |
1202 void grow_to_match(const MergeMemNode* other); | |
1203 bool verify_sparse() const PRODUCT_RETURN0; | |
1204 #ifndef PRODUCT | |
1205 virtual void dump_spec(outputStream *st) const; | |
1206 #endif | |
1207 }; | |
1208 | |
1209 class MergeMemStream : public StackObj { | |
1210 private: | |
1211 MergeMemNode* _mm; | |
1212 const MergeMemNode* _mm2; // optional second guy, contributes non-empty iterations | |
1213 Node* _mm_base; // loop-invariant base memory of _mm | |
1214 int _idx; | |
1215 int _cnt; | |
1216 Node* _mem; | |
1217 Node* _mem2; | |
1218 int _cnt2; | |
1219 | |
1220 void init(MergeMemNode* mm, const MergeMemNode* mm2 = NULL) { | |
1221 // subsume_node will break sparseness at times, whenever a memory slice | |
1222 // folds down to a copy of the base ("fat") memory. In such a case, | |
1223 // the raw edge will update to base, although it should be top. | |
1224 // This iterator will recognize either top or base_memory as an | |
1225 // "empty" slice. See is_empty, is_empty2, and next below. | |
1226 // | |
1227 // The sparseness property is repaired in MergeMemNode::Ideal. | |
1228 // As long as access to a MergeMem goes through this iterator | |
1229 // or the memory_at accessor, flaws in the sparseness will | |
1230 // never be observed. | |
1231 // | |
1232 // Also, iteration_setup repairs sparseness. | |
1233 assert(mm->verify_sparse(), "please, no dups of base"); | |
1234 assert(mm2==NULL || mm2->verify_sparse(), "please, no dups of base"); | |
1235 | |
1236 _mm = mm; | |
1237 _mm_base = mm->base_memory(); | |
1238 _mm2 = mm2; | |
1239 _cnt = mm->req(); | |
1240 _idx = Compile::AliasIdxBot-1; // start at the base memory | |
1241 _mem = NULL; | |
1242 _mem2 = NULL; | |
1243 } | |
1244 | |
1245 #ifdef ASSERT | |
1246 Node* check_memory() const { | |
1247 if (at_base_memory()) | |
1248 return _mm->base_memory(); | |
1249 else if ((uint)_idx < _mm->req() && !_mm->in(_idx)->is_top()) | |
1250 return _mm->memory_at(_idx); | |
1251 else | |
1252 return _mm_base; | |
1253 } | |
1254 Node* check_memory2() const { | |
1255 return at_base_memory()? _mm2->base_memory(): _mm2->memory_at(_idx); | |
1256 } | |
1257 #endif | |
1258 | |
1259 static bool match_memory(Node* mem, const MergeMemNode* mm, int idx) PRODUCT_RETURN0; | |
1260 void assert_synch() const { | |
1261 assert(!_mem || _idx >= _cnt || match_memory(_mem, _mm, _idx), | |
1262 "no side-effects except through the stream"); | |
1263 } | |
1264 | |
1265 public: | |
1266 | |
1267 // expected usages: | |
1268 // for (MergeMemStream mms(mem->is_MergeMem()); next_non_empty(); ) { ... } | |
1269 // for (MergeMemStream mms(mem1, mem2); next_non_empty2(); ) { ... } | |
1270 | |
1271 // iterate over one merge | |
1272 MergeMemStream(MergeMemNode* mm) { | |
1273 mm->iteration_setup(); | |
1274 init(mm); | |
1275 debug_only(_cnt2 = 999); | |
1276 } | |
1277 // iterate in parallel over two merges | |
1278 // only iterates through non-empty elements of mm2 | |
1279 MergeMemStream(MergeMemNode* mm, const MergeMemNode* mm2) { | |
1280 assert(mm2, "second argument must be a MergeMem also"); | |
1281 ((MergeMemNode*)mm2)->iteration_setup(); // update hidden state | |
1282 mm->iteration_setup(mm2); | |
1283 init(mm, mm2); | |
1284 _cnt2 = mm2->req(); | |
1285 } | |
1286 #ifdef ASSERT | |
1287 ~MergeMemStream() { | |
1288 assert_synch(); | |
1289 } | |
1290 #endif | |
1291 | |
1292 MergeMemNode* all_memory() const { | |
1293 return _mm; | |
1294 } | |
1295 Node* base_memory() const { | |
1296 assert(_mm_base == _mm->base_memory(), "no update to base memory, please"); | |
1297 return _mm_base; | |
1298 } | |
1299 const MergeMemNode* all_memory2() const { | |
1300 assert(_mm2 != NULL, ""); | |
1301 return _mm2; | |
1302 } | |
1303 bool at_base_memory() const { | |
1304 return _idx == Compile::AliasIdxBot; | |
1305 } | |
1306 int alias_idx() const { | |
1307 assert(_mem, "must call next 1st"); | |
1308 return _idx; | |
1309 } | |
1310 | |
1311 const TypePtr* adr_type() const { | |
1312 return Compile::current()->get_adr_type(alias_idx()); | |
1313 } | |
1314 | |
1315 const TypePtr* adr_type(Compile* C) const { | |
1316 return C->get_adr_type(alias_idx()); | |
1317 } | |
1318 bool is_empty() const { | |
1319 assert(_mem, "must call next 1st"); | |
1320 assert(_mem->is_top() == (_mem==_mm->empty_memory()), "correct sentinel"); | |
1321 return _mem->is_top(); | |
1322 } | |
1323 bool is_empty2() const { | |
1324 assert(_mem2, "must call next 1st"); | |
1325 assert(_mem2->is_top() == (_mem2==_mm2->empty_memory()), "correct sentinel"); | |
1326 return _mem2->is_top(); | |
1327 } | |
1328 Node* memory() const { | |
1329 assert(!is_empty(), "must not be empty"); | |
1330 assert_synch(); | |
1331 return _mem; | |
1332 } | |
1333 // get the current memory, regardless of empty or non-empty status | |
1334 Node* force_memory() const { | |
1335 assert(!is_empty() || !at_base_memory(), ""); | |
1336 // Use _mm_base to defend against updates to _mem->base_memory(). | |
1337 Node *mem = _mem->is_top() ? _mm_base : _mem; | |
1338 assert(mem == check_memory(), ""); | |
1339 return mem; | |
1340 } | |
1341 Node* memory2() const { | |
1342 assert(_mem2 == check_memory2(), ""); | |
1343 return _mem2; | |
1344 } | |
1345 void set_memory(Node* mem) { | |
1346 if (at_base_memory()) { | |
1347 // Note that this does not change the invariant _mm_base. | |
1348 _mm->set_base_memory(mem); | |
1349 } else { | |
1350 _mm->set_memory_at(_idx, mem); | |
1351 } | |
1352 _mem = mem; | |
1353 assert_synch(); | |
1354 } | |
1355 | |
1356 // Recover from a side effect to the MergeMemNode. | |
1357 void set_memory() { | |
1358 _mem = _mm->in(_idx); | |
1359 } | |
1360 | |
1361 bool next() { return next(false); } | |
1362 bool next2() { return next(true); } | |
1363 | |
1364 bool next_non_empty() { return next_non_empty(false); } | |
1365 bool next_non_empty2() { return next_non_empty(true); } | |
1366 // next_non_empty2 can yield states where is_empty() is true | |
1367 | |
1368 private: | |
1369 // find the next item, which might be empty | |
1370 bool next(bool have_mm2) { | |
1371 assert((_mm2 != NULL) == have_mm2, "use other next"); | |
1372 assert_synch(); | |
1373 if (++_idx < _cnt) { | |
1374 // Note: This iterator allows _mm to be non-sparse. | |
1375 // It behaves the same whether _mem is top or base_memory. | |
1376 _mem = _mm->in(_idx); | |
1377 if (have_mm2) | |
1378 _mem2 = _mm2->in((_idx < _cnt2) ? _idx : Compile::AliasIdxTop); | |
1379 return true; | |
1380 } | |
1381 return false; | |
1382 } | |
1383 | |
1384 // find the next non-empty item | |
1385 bool next_non_empty(bool have_mm2) { | |
1386 while (next(have_mm2)) { | |
1387 if (!is_empty()) { | |
1388 // make sure _mem2 is filled in sensibly | |
1389 if (have_mm2 && _mem2->is_top()) _mem2 = _mm2->base_memory(); | |
1390 return true; | |
1391 } else if (have_mm2 && !is_empty2()) { | |
1392 return true; // is_empty() == true | |
1393 } | |
1394 } | |
1395 return false; | |
1396 } | |
1397 }; | |
1398 | |
1399 //------------------------------Prefetch--------------------------------------- | |
1400 | |
1401 // Non-faulting prefetch load. Prefetch for many reads. | |
1402 class PrefetchReadNode : public Node { | |
1403 public: | |
1404 PrefetchReadNode(Node *abio, Node *adr) : Node(0,abio,adr) {} | |
1405 virtual int Opcode() const; | |
1406 virtual uint ideal_reg() const { return NotAMachineReg; } | |
1407 virtual uint match_edge(uint idx) const { return idx==2; } | |
1408 virtual const Type *bottom_type() const { return Type::ABIO; } | |
1409 }; | |
1410 | |
1411 // Non-faulting prefetch load. Prefetch for many reads & many writes. | |
1412 class PrefetchWriteNode : public Node { | |
1413 public: | |
1414 PrefetchWriteNode(Node *abio, Node *adr) : Node(0,abio,adr) {} | |
1415 virtual int Opcode() const; | |
1416 virtual uint ideal_reg() const { return NotAMachineReg; } | |
1417 virtual uint match_edge(uint idx) const { return idx==2; } | |
3854 | 1418 virtual const Type *bottom_type() const { return Type::ABIO; } |
1419 }; | |
1420 | |
1421 // Allocation prefetch which may fault, TLAB size have to be adjusted. | |
1422 class PrefetchAllocationNode : public Node { | |
1423 public: | |
1424 PrefetchAllocationNode(Node *mem, Node *adr) : Node(0,mem,adr) {} | |
1425 virtual int Opcode() const; | |
1426 virtual uint ideal_reg() const { return NotAMachineReg; } | |
1427 virtual uint match_edge(uint idx) const { return idx==2; } | |
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1428 virtual const Type *bottom_type() const { return ( AllocatePrefetchStyle == 3 ) ? Type::MEMORY : Type::ABIO; } |
0 | 1429 }; |
1972 | 1430 |
1431 #endif // SHARE_VM_OPTO_MEMNODE_HPP |