Mercurial > hg > graal-jvmci-8
annotate src/share/vm/opto/memnode.hpp @ 24145:2f2299c68571 jvmci-0.27
change default of UseJVMCICompiler based on jvmci.Compiler property (which can now be set from <java.home>/jre/lib/jvmci/compiler-name)
author | Doug Simon <doug.simon@oracle.com> |
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date | Thu, 15 Jun 2017 21:38:21 +0200 |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2013, 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: |
85
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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 public: |
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142 // Some loads (from unsafe) should be pinned: they don't depend only |
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143 // on the dominating test. The boolean field _depends_only_on_test |
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144 // below records whether that node depends only on the dominating |
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145 // test. |
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146 // Methods used to build LoadNodes pass an argument of type enum |
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147 // ControlDependency instead of a boolean because those methods |
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148 // typically have multiple boolean parameters with default values: |
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149 // passing the wrong boolean to one of these parameters by mistake |
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150 // goes easily unnoticed. Using an enum, the compiler can check that |
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151 // the type of a value and the type of the parameter match. |
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152 enum ControlDependency { |
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153 Pinned, |
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154 DependsOnlyOnTest |
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155 }; |
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156 private: |
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157 // LoadNode::hash() doesn't take the _depends_only_on_test field |
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158 // into account: If the graph already has a non-pinned LoadNode and |
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159 // we add a pinned LoadNode with the same inputs, it's safe for GVN |
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160 // to replace the pinned LoadNode with the non-pinned LoadNode, |
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161 // otherwise it wouldn't be safe to have a non pinned LoadNode with |
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162 // those inputs in the first place. If the graph already has a |
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163 // pinned LoadNode and we add a non pinned LoadNode with the same |
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164 // inputs, it's safe (but suboptimal) for GVN to replace the |
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165 // non-pinned LoadNode by the pinned LoadNode. |
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166 bool _depends_only_on_test; |
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167 |
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168 // On platforms with weak memory ordering (e.g., PPC, Ia64) we distinguish |
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169 // loads that can be reordered, and such requiring acquire semantics to |
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170 // adhere to the Java specification. The required behaviour is stored in |
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171 // this field. |
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172 const MemOrd _mo; |
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173 |
0 | 174 protected: |
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175 virtual uint cmp(const Node &n) const; |
0 | 176 virtual uint size_of() const; // Size is bigger |
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177 // Should LoadNode::Ideal() attempt to remove control edges? |
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178 virtual bool can_remove_control() const; |
0 | 179 const Type* const _type; // What kind of value is loaded? |
180 public: | |
181 | |
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182 LoadNode(Node *c, Node *mem, Node *adr, const TypePtr* at, const Type *rt, MemOrd mo, ControlDependency control_dependency) |
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183 : MemNode(c,mem,adr,at), _type(rt), _mo(mo), _depends_only_on_test(control_dependency == DependsOnlyOnTest) { |
0 | 184 init_class_id(Class_Load); |
185 } | |
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186 inline bool is_unordered() const { return !is_acquire(); } |
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187 inline bool is_acquire() const { |
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188 assert(_mo == unordered || _mo == acquire, "unexpected"); |
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189 return _mo == acquire; |
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190 } |
0 | 191 |
192 // Polymorphic factory method: | |
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193 static Node* make(PhaseGVN& gvn, Node *c, Node *mem, Node *adr, |
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194 const TypePtr* at, const Type *rt, BasicType bt, |
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195 MemOrd mo, ControlDependency control_dependency = DependsOnlyOnTest); |
0 | 196 |
197 virtual uint hash() const; // Check the type | |
198 | |
199 // Handle algebraic identities here. If we have an identity, return the Node | |
200 // we are equivalent to. We look for Load of a Store. | |
201 virtual Node *Identity( PhaseTransform *phase ); | |
202 | |
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203 // If the load is from Field memory and the pointer is non-null, it might be possible to |
0 | 204 // zero out the control input. |
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205 // If the offset is constant and the base is an object allocation, |
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206 // try to hook me up to the exact initializing store. |
0 | 207 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); |
208 | |
163 | 209 // Split instance field load through Phi. |
210 Node* split_through_phi(PhaseGVN *phase); | |
211 | |
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212 // Recover original value from boxed values |
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213 Node *eliminate_autobox(PhaseGVN *phase); |
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214 |
0 | 215 // Compute a new Type for this node. Basically we just do the pre-check, |
216 // then call the virtual add() to set the type. | |
217 virtual const Type *Value( PhaseTransform *phase ) const; | |
218 | |
164
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219 // Common methods for LoadKlass and LoadNKlass nodes. |
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220 const Type *klass_value_common( PhaseTransform *phase ) const; |
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221 Node *klass_identity_common( PhaseTransform *phase ); |
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222 |
0 | 223 virtual uint ideal_reg() const; |
224 virtual const Type *bottom_type() const; | |
225 // Following method is copied from TypeNode: | |
226 void set_type(const Type* t) { | |
227 assert(t != NULL, "sanity"); | |
228 debug_only(uint check_hash = (VerifyHashTableKeys && _hash_lock) ? hash() : NO_HASH); | |
229 *(const Type**)&_type = t; // cast away const-ness | |
230 // If this node is in the hash table, make sure it doesn't need a rehash. | |
231 assert(check_hash == NO_HASH || check_hash == hash(), "type change must preserve hash code"); | |
232 } | |
233 const Type* type() const { assert(_type != NULL, "sanity"); return _type; }; | |
234 | |
235 // Do not match memory edge | |
236 virtual uint match_edge(uint idx) const; | |
237 | |
238 // Map a load opcode to its corresponding store opcode. | |
239 virtual int store_Opcode() const = 0; | |
240 | |
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241 // Check if the load's memory input is a Phi node with the same control. |
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242 bool is_instance_field_load_with_local_phi(Node* ctrl); |
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243 |
0 | 244 #ifndef PRODUCT |
245 virtual void dump_spec(outputStream *st) const; | |
246 #endif | |
1609 | 247 #ifdef ASSERT |
248 // Helper function to allow a raw load without control edge for some cases | |
249 static bool is_immutable_value(Node* adr); | |
250 #endif | |
0 | 251 protected: |
252 const Type* load_array_final_field(const TypeKlassPtr *tkls, | |
253 ciKlass* klass) const; | |
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254 // depends_only_on_test is almost always true, and needs to be almost always |
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255 // true to enable key hoisting & commoning optimizations. However, for the |
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256 // special case of RawPtr loads from TLS top & end, and other loads performed by |
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257 // GC barriers, the control edge carries the dependence preventing hoisting past |
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258 // a Safepoint instead of the memory edge. (An unfortunate consequence of having |
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259 // Safepoints not set Raw Memory; itself an unfortunate consequence of having Nodes |
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260 // which produce results (new raw memory state) inside of loops preventing all |
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261 // manner of other optimizations). Basically, it's ugly but so is the alternative. |
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262 // See comment in macro.cpp, around line 125 expand_allocate_common(). |
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263 virtual bool depends_only_on_test() const { return adr_type() != TypeRawPtr::BOTTOM && _depends_only_on_test; } |
0 | 264 }; |
265 | |
266 //------------------------------LoadBNode-------------------------------------- | |
267 // Load a byte (8bits signed) from memory | |
268 class LoadBNode : public LoadNode { | |
269 public: | |
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270 LoadBNode(Node *c, Node *mem, Node *adr, const TypePtr* at, const TypeInt *ti, MemOrd mo, ControlDependency control_dependency = DependsOnlyOnTest) |
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271 : LoadNode(c, mem, adr, at, ti, mo, control_dependency) {} |
0 | 272 virtual int Opcode() const; |
273 virtual uint ideal_reg() const { return Op_RegI; } | |
274 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
4815 | 275 virtual const Type *Value(PhaseTransform *phase) const; |
0 | 276 virtual int store_Opcode() const { return Op_StoreB; } |
277 virtual BasicType memory_type() const { return T_BYTE; } | |
278 }; | |
279 | |
624 | 280 //------------------------------LoadUBNode------------------------------------- |
281 // Load a unsigned byte (8bits unsigned) from memory | |
282 class LoadUBNode : public LoadNode { | |
283 public: | |
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284 LoadUBNode(Node* c, Node* mem, Node* adr, const TypePtr* at, const TypeInt* ti, MemOrd mo, ControlDependency control_dependency = DependsOnlyOnTest) |
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285 : LoadNode(c, mem, adr, at, ti, mo, control_dependency) {} |
624 | 286 virtual int Opcode() const; |
287 virtual uint ideal_reg() const { return Op_RegI; } | |
288 virtual Node* Ideal(PhaseGVN *phase, bool can_reshape); | |
4815 | 289 virtual const Type *Value(PhaseTransform *phase) const; |
624 | 290 virtual int store_Opcode() const { return Op_StoreB; } |
291 virtual BasicType memory_type() const { return T_BYTE; } | |
292 }; | |
293 | |
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294 //------------------------------LoadUSNode------------------------------------- |
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295 // Load an unsigned short/char (16bits unsigned) from memory |
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296 class LoadUSNode : public LoadNode { |
0 | 297 public: |
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298 LoadUSNode(Node *c, Node *mem, Node *adr, const TypePtr* at, const TypeInt *ti, MemOrd mo, ControlDependency control_dependency = DependsOnlyOnTest) |
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299 : LoadNode(c, mem, adr, at, ti, mo, control_dependency) {} |
0 | 300 virtual int Opcode() const; |
301 virtual uint ideal_reg() const { return Op_RegI; } | |
302 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
4815 | 303 virtual const Type *Value(PhaseTransform *phase) const; |
0 | 304 virtual int store_Opcode() const { return Op_StoreC; } |
305 virtual BasicType memory_type() const { return T_CHAR; } | |
306 }; | |
307 | |
4815 | 308 //------------------------------LoadSNode-------------------------------------- |
309 // Load a short (16bits signed) from memory | |
310 class LoadSNode : public LoadNode { | |
311 public: | |
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312 LoadSNode(Node *c, Node *mem, Node *adr, const TypePtr* at, const TypeInt *ti, MemOrd mo, ControlDependency control_dependency = DependsOnlyOnTest) |
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313 : LoadNode(c, mem, adr, at, ti, mo, control_dependency) {} |
4815 | 314 virtual int Opcode() const; |
315 virtual uint ideal_reg() const { return Op_RegI; } | |
316 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
317 virtual const Type *Value(PhaseTransform *phase) const; | |
318 virtual int store_Opcode() const { return Op_StoreC; } | |
319 virtual BasicType memory_type() const { return T_SHORT; } | |
320 }; | |
321 | |
0 | 322 //------------------------------LoadINode-------------------------------------- |
323 // Load an integer from memory | |
324 class LoadINode : public LoadNode { | |
325 public: | |
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326 LoadINode(Node *c, Node *mem, Node *adr, const TypePtr* at, const TypeInt *ti, MemOrd mo, ControlDependency control_dependency = DependsOnlyOnTest) |
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327 : LoadNode(c, mem, adr, at, ti, mo, control_dependency) {} |
0 | 328 virtual int Opcode() const; |
329 virtual uint ideal_reg() const { return Op_RegI; } | |
330 virtual int store_Opcode() const { return Op_StoreI; } | |
331 virtual BasicType memory_type() const { return T_INT; } | |
332 }; | |
333 | |
334 //------------------------------LoadRangeNode---------------------------------- | |
335 // Load an array length from the array | |
336 class LoadRangeNode : public LoadINode { | |
337 public: | |
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338 LoadRangeNode(Node *c, Node *mem, Node *adr, const TypeInt *ti = TypeInt::POS) |
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339 : LoadINode(c, mem, adr, TypeAryPtr::RANGE, ti, MemNode::unordered) {} |
0 | 340 virtual int Opcode() const; |
341 virtual const Type *Value( PhaseTransform *phase ) const; | |
342 virtual Node *Identity( PhaseTransform *phase ); | |
366
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343 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); |
0 | 344 }; |
345 | |
346 //------------------------------LoadLNode-------------------------------------- | |
347 // Load a long from memory | |
348 class LoadLNode : public LoadNode { | |
349 virtual uint hash() const { return LoadNode::hash() + _require_atomic_access; } | |
350 virtual uint cmp( const Node &n ) const { | |
351 return _require_atomic_access == ((LoadLNode&)n)._require_atomic_access | |
352 && LoadNode::cmp(n); | |
353 } | |
354 virtual uint size_of() const { return sizeof(*this); } | |
355 const bool _require_atomic_access; // is piecewise load forbidden? | |
356 | |
357 public: | |
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358 LoadLNode(Node *c, Node *mem, Node *adr, const TypePtr* at, const TypeLong *tl, |
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359 MemOrd mo, ControlDependency control_dependency = DependsOnlyOnTest, bool require_atomic_access = false) |
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360 : LoadNode(c, mem, adr, at, tl, mo, control_dependency), _require_atomic_access(require_atomic_access) {} |
0 | 361 virtual int Opcode() const; |
362 virtual uint ideal_reg() const { return Op_RegL; } | |
363 virtual int store_Opcode() const { return Op_StoreL; } | |
364 virtual BasicType memory_type() const { return T_LONG; } | |
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365 bool require_atomic_access() const { return _require_atomic_access; } |
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366 static LoadLNode* make_atomic(Compile *C, Node* ctl, Node* mem, Node* adr, const TypePtr* adr_type, |
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367 const Type* rt, MemOrd mo, ControlDependency control_dependency = DependsOnlyOnTest); |
0 | 368 #ifndef PRODUCT |
369 virtual void dump_spec(outputStream *st) const { | |
370 LoadNode::dump_spec(st); | |
371 if (_require_atomic_access) st->print(" Atomic!"); | |
372 } | |
373 #endif | |
374 }; | |
375 | |
376 //------------------------------LoadL_unalignedNode---------------------------- | |
377 // Load a long from unaligned memory | |
378 class LoadL_unalignedNode : public LoadLNode { | |
379 public: | |
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380 LoadL_unalignedNode(Node *c, Node *mem, Node *adr, const TypePtr* at, MemOrd mo, ControlDependency control_dependency = DependsOnlyOnTest) |
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381 : LoadLNode(c, mem, adr, at, TypeLong::LONG, mo, control_dependency) {} |
0 | 382 virtual int Opcode() const; |
383 }; | |
384 | |
385 //------------------------------LoadFNode-------------------------------------- | |
386 // Load a float (64 bits) from memory | |
387 class LoadFNode : public LoadNode { | |
388 public: | |
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389 LoadFNode(Node *c, Node *mem, Node *adr, const TypePtr* at, const Type *t, MemOrd mo, ControlDependency control_dependency = DependsOnlyOnTest) |
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390 : LoadNode(c, mem, adr, at, t, mo, control_dependency) {} |
0 | 391 virtual int Opcode() const; |
392 virtual uint ideal_reg() const { return Op_RegF; } | |
393 virtual int store_Opcode() const { return Op_StoreF; } | |
394 virtual BasicType memory_type() const { return T_FLOAT; } | |
395 }; | |
396 | |
397 //------------------------------LoadDNode-------------------------------------- | |
398 // Load a double (64 bits) from memory | |
399 class LoadDNode : public LoadNode { | |
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400 virtual uint hash() const { return LoadNode::hash() + _require_atomic_access; } |
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401 virtual uint cmp( const Node &n ) const { |
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402 return _require_atomic_access == ((LoadDNode&)n)._require_atomic_access |
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403 && LoadNode::cmp(n); |
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404 } |
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405 virtual uint size_of() const { return sizeof(*this); } |
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406 const bool _require_atomic_access; // is piecewise load forbidden? |
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407 |
0 | 408 public: |
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409 LoadDNode(Node *c, Node *mem, Node *adr, const TypePtr* at, const Type *t, |
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410 MemOrd mo, ControlDependency control_dependency = DependsOnlyOnTest, bool require_atomic_access = false) |
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411 : LoadNode(c, mem, adr, at, t, mo, control_dependency), _require_atomic_access(require_atomic_access) {} |
0 | 412 virtual int Opcode() const; |
413 virtual uint ideal_reg() const { return Op_RegD; } | |
414 virtual int store_Opcode() const { return Op_StoreD; } | |
415 virtual BasicType memory_type() const { return T_DOUBLE; } | |
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416 bool require_atomic_access() const { return _require_atomic_access; } |
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417 static LoadDNode* make_atomic(Compile *C, Node* ctl, Node* mem, Node* adr, const TypePtr* adr_type, |
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418 const Type* rt, MemOrd mo, ControlDependency control_dependency = DependsOnlyOnTest); |
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419 #ifndef PRODUCT |
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420 virtual void dump_spec(outputStream *st) const { |
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421 LoadNode::dump_spec(st); |
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422 if (_require_atomic_access) st->print(" Atomic!"); |
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423 } |
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424 #endif |
0 | 425 }; |
426 | |
427 //------------------------------LoadD_unalignedNode---------------------------- | |
428 // Load a double from unaligned memory | |
429 class LoadD_unalignedNode : public LoadDNode { | |
430 public: | |
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431 LoadD_unalignedNode(Node *c, Node *mem, Node *adr, const TypePtr* at, MemOrd mo, ControlDependency control_dependency = DependsOnlyOnTest) |
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432 : LoadDNode(c, mem, adr, at, Type::DOUBLE, mo, control_dependency) {} |
0 | 433 virtual int Opcode() const; |
434 }; | |
435 | |
436 //------------------------------LoadPNode-------------------------------------- | |
437 // Load a pointer from memory (either object or array) | |
438 class LoadPNode : public LoadNode { | |
439 public: | |
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440 LoadPNode(Node *c, Node *mem, Node *adr, const TypePtr *at, const TypePtr* t, MemOrd mo, ControlDependency control_dependency = DependsOnlyOnTest) |
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441 : LoadNode(c, mem, adr, at, t, mo, control_dependency) {} |
0 | 442 virtual int Opcode() const; |
443 virtual uint ideal_reg() const { return Op_RegP; } | |
444 virtual int store_Opcode() const { return Op_StoreP; } | |
445 virtual BasicType memory_type() const { return T_ADDRESS; } | |
446 }; | |
447 | |
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448 |
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449 //------------------------------LoadNNode-------------------------------------- |
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450 // Load a narrow oop from memory (either object or array) |
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451 class LoadNNode : public LoadNode { |
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452 public: |
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453 LoadNNode(Node *c, Node *mem, Node *adr, const TypePtr *at, const Type* t, MemOrd mo, ControlDependency control_dependency = DependsOnlyOnTest) |
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454 : LoadNode(c, mem, adr, at, t, mo, control_dependency) {} |
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455 virtual int Opcode() const; |
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456 virtual uint ideal_reg() const { return Op_RegN; } |
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457 virtual int store_Opcode() const { return Op_StoreN; } |
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458 virtual BasicType memory_type() const { return T_NARROWOOP; } |
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459 }; |
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460 |
0 | 461 //------------------------------LoadKlassNode---------------------------------- |
462 // Load a Klass from an object | |
463 class LoadKlassNode : public LoadPNode { | |
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464 protected: |
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465 // In most cases, LoadKlassNode does not have the control input set. If the control |
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466 // input is set, it must not be removed (by LoadNode::Ideal()). |
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467 virtual bool can_remove_control() const; |
0 | 468 public: |
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469 LoadKlassNode(Node *c, Node *mem, Node *adr, const TypePtr *at, const TypeKlassPtr *tk, MemOrd mo) |
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470 : LoadPNode(c, mem, adr, at, tk, mo) {} |
0 | 471 virtual int Opcode() const; |
472 virtual const Type *Value( PhaseTransform *phase ) const; | |
473 virtual Node *Identity( PhaseTransform *phase ); | |
474 virtual bool depends_only_on_test() const { return true; } | |
164
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475 |
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476 // Polymorphic factory method: |
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477 static Node* make(PhaseGVN& gvn, Node* ctl, Node* mem, Node* adr, const TypePtr* at, |
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478 const TypeKlassPtr* tk = TypeKlassPtr::OBJECT); |
0 | 479 }; |
480 | |
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481 //------------------------------LoadNKlassNode--------------------------------- |
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482 // Load a narrow Klass from an object. |
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483 class LoadNKlassNode : public LoadNNode { |
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484 public: |
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485 LoadNKlassNode(Node *c, Node *mem, Node *adr, const TypePtr *at, const TypeNarrowKlass *tk, MemOrd mo) |
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486 : LoadNNode(c, mem, adr, at, tk, mo) {} |
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487 virtual int Opcode() const; |
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488 virtual uint ideal_reg() const { return Op_RegN; } |
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489 virtual int store_Opcode() const { return Op_StoreNKlass; } |
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490 virtual BasicType memory_type() const { return T_NARROWKLASS; } |
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491 |
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492 virtual const Type *Value( PhaseTransform *phase ) const; |
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493 virtual Node *Identity( PhaseTransform *phase ); |
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494 virtual bool depends_only_on_test() const { return true; } |
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495 }; |
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496 |
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497 |
0 | 498 //------------------------------StoreNode-------------------------------------- |
499 // Store value; requires Store, Address and Value | |
500 class StoreNode : public MemNode { | |
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501 private: |
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502 // On platforms with weak memory ordering (e.g., PPC, Ia64) we distinguish |
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503 // stores that can be reordered, and such requiring release semantics to |
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504 // adhere to the Java specification. The required behaviour is stored in |
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505 // this field. |
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506 const MemOrd _mo; |
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507 // Needed for proper cloning. |
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508 virtual uint size_of() const { return sizeof(*this); } |
0 | 509 protected: |
510 virtual uint cmp( const Node &n ) const; | |
511 virtual bool depends_only_on_test() const { return false; } | |
512 | |
513 Node *Ideal_masked_input (PhaseGVN *phase, uint mask); | |
514 Node *Ideal_sign_extended_input(PhaseGVN *phase, int num_bits); | |
515 | |
516 public: | |
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517 // We must ensure that stores of object references will be visible |
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518 // only after the object's initialization. So the callers of this |
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519 // procedure must indicate that the store requires `release' |
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520 // semantics, if the stored value is an object reference that might |
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521 // point to a new object and may become externally visible. |
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522 StoreNode(Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val, MemOrd mo) |
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523 : MemNode(c, mem, adr, at, val), _mo(mo) { |
0 | 524 init_class_id(Class_Store); |
525 } | |
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526 StoreNode(Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val, Node *oop_store, MemOrd mo) |
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527 : MemNode(c, mem, adr, at, val, oop_store), _mo(mo) { |
0 | 528 init_class_id(Class_Store); |
529 } | |
530 | |
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531 inline bool is_unordered() const { return !is_release(); } |
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532 inline bool is_release() const { |
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533 assert((_mo == unordered || _mo == release), "unexpected"); |
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534 return _mo == release; |
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535 } |
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536 |
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537 // Conservatively release stores of object references in order to |
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538 // ensure visibility of object initialization. |
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539 static inline MemOrd release_if_reference(const BasicType t) { |
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540 const MemOrd mo = (t == T_ARRAY || |
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541 t == T_ADDRESS || // Might be the address of an object reference (`boxing'). |
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542 t == T_OBJECT) ? release : unordered; |
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543 return mo; |
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544 } |
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545 |
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546 // Polymorphic factory method |
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547 // |
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548 // We must ensure that stores of object references will be visible |
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549 // only after the object's initialization. So the callers of this |
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550 // procedure must indicate that the store requires `release' |
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551 // semantics, if the stored value is an object reference that might |
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552 // point to a new object and may become externally visible. |
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553 static StoreNode* make(PhaseGVN& gvn, Node *c, Node *mem, Node *adr, |
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554 const TypePtr* at, Node *val, BasicType bt, MemOrd mo); |
0 | 555 |
556 virtual uint hash() const; // Check the type | |
557 | |
558 // If the store is to Field memory and the pointer is non-null, we can | |
559 // zero out the control input. | |
560 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
561 | |
562 // Compute a new Type for this node. Basically we just do the pre-check, | |
563 // then call the virtual add() to set the type. | |
564 virtual const Type *Value( PhaseTransform *phase ) const; | |
565 | |
566 // Check for identity function on memory (Load then Store at same address) | |
567 virtual Node *Identity( PhaseTransform *phase ); | |
568 | |
569 // Do not match memory edge | |
570 virtual uint match_edge(uint idx) const; | |
571 | |
572 virtual const Type *bottom_type() const; // returns Type::MEMORY | |
573 | |
574 // Map a store opcode to its corresponding own opcode, trivially. | |
575 virtual int store_Opcode() const { return Opcode(); } | |
576 | |
577 // have all possible loads of the value stored been optimized away? | |
578 bool value_never_loaded(PhaseTransform *phase) const; | |
579 }; | |
580 | |
581 //------------------------------StoreBNode------------------------------------- | |
582 // Store byte to memory | |
583 class StoreBNode : public StoreNode { | |
584 public: | |
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585 StoreBNode(Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val, MemOrd mo) |
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586 : StoreNode(c, mem, adr, at, val, mo) {} |
0 | 587 virtual int Opcode() const; |
588 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
589 virtual BasicType memory_type() const { return T_BYTE; } | |
590 }; | |
591 | |
592 //------------------------------StoreCNode------------------------------------- | |
593 // Store char/short to memory | |
594 class StoreCNode : public StoreNode { | |
595 public: | |
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596 StoreCNode(Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val, MemOrd mo) |
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597 : StoreNode(c, mem, adr, at, val, mo) {} |
0 | 598 virtual int Opcode() const; |
599 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
600 virtual BasicType memory_type() const { return T_CHAR; } | |
601 }; | |
602 | |
603 //------------------------------StoreINode------------------------------------- | |
604 // Store int to memory | |
605 class StoreINode : public StoreNode { | |
606 public: | |
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607 StoreINode(Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val, MemOrd mo) |
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608 : StoreNode(c, mem, adr, at, val, mo) {} |
0 | 609 virtual int Opcode() const; |
610 virtual BasicType memory_type() const { return T_INT; } | |
611 }; | |
612 | |
613 //------------------------------StoreLNode------------------------------------- | |
614 // Store long to memory | |
615 class StoreLNode : public StoreNode { | |
616 virtual uint hash() const { return StoreNode::hash() + _require_atomic_access; } | |
617 virtual uint cmp( const Node &n ) const { | |
618 return _require_atomic_access == ((StoreLNode&)n)._require_atomic_access | |
619 && StoreNode::cmp(n); | |
620 } | |
621 virtual uint size_of() const { return sizeof(*this); } | |
622 const bool _require_atomic_access; // is piecewise store forbidden? | |
623 | |
624 public: | |
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625 StoreLNode(Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val, MemOrd mo, bool require_atomic_access = false) |
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626 : StoreNode(c, mem, adr, at, val, mo), _require_atomic_access(require_atomic_access) {} |
0 | 627 virtual int Opcode() const; |
628 virtual BasicType memory_type() const { return T_LONG; } | |
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629 bool require_atomic_access() const { return _require_atomic_access; } |
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630 static StoreLNode* make_atomic(Compile *C, Node* ctl, Node* mem, Node* adr, const TypePtr* adr_type, Node* val, MemOrd mo); |
0 | 631 #ifndef PRODUCT |
632 virtual void dump_spec(outputStream *st) const { | |
633 StoreNode::dump_spec(st); | |
634 if (_require_atomic_access) st->print(" Atomic!"); | |
635 } | |
636 #endif | |
637 }; | |
638 | |
639 //------------------------------StoreFNode------------------------------------- | |
640 // Store float to memory | |
641 class StoreFNode : public StoreNode { | |
642 public: | |
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643 StoreFNode(Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val, MemOrd mo) |
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644 : StoreNode(c, mem, adr, at, val, mo) {} |
0 | 645 virtual int Opcode() const; |
646 virtual BasicType memory_type() const { return T_FLOAT; } | |
647 }; | |
648 | |
649 //------------------------------StoreDNode------------------------------------- | |
650 // Store double to memory | |
651 class StoreDNode : public StoreNode { | |
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652 virtual uint hash() const { return StoreNode::hash() + _require_atomic_access; } |
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653 virtual uint cmp( const Node &n ) const { |
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654 return _require_atomic_access == ((StoreDNode&)n)._require_atomic_access |
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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 const bool _require_atomic_access; // is piecewise store forbidden? |
0 | 659 public: |
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660 StoreDNode(Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val, |
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661 MemOrd mo, bool require_atomic_access = false) |
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662 : StoreNode(c, mem, adr, at, val, mo), _require_atomic_access(require_atomic_access) {} |
0 | 663 virtual int Opcode() const; |
664 virtual BasicType memory_type() const { return T_DOUBLE; } | |
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665 bool require_atomic_access() const { return _require_atomic_access; } |
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666 static StoreDNode* make_atomic(Compile *C, Node* ctl, Node* mem, Node* adr, const TypePtr* adr_type, Node* val, MemOrd mo); |
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667 #ifndef PRODUCT |
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668 virtual void dump_spec(outputStream *st) const { |
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669 StoreNode::dump_spec(st); |
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670 if (_require_atomic_access) st->print(" Atomic!"); |
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671 } |
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672 #endif |
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673 |
0 | 674 }; |
675 | |
676 //------------------------------StorePNode------------------------------------- | |
677 // Store pointer to memory | |
678 class StorePNode : public StoreNode { | |
679 public: | |
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680 StorePNode(Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val, MemOrd mo) |
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681 : StoreNode(c, mem, adr, at, val, mo) {} |
0 | 682 virtual int Opcode() const; |
683 virtual BasicType memory_type() const { return T_ADDRESS; } | |
684 }; | |
685 | |
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686 //------------------------------StoreNNode------------------------------------- |
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687 // Store narrow oop to memory |
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688 class StoreNNode : public StoreNode { |
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689 public: |
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690 StoreNNode(Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val, MemOrd mo) |
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691 : StoreNode(c, mem, adr, at, val, mo) {} |
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692 virtual int Opcode() const; |
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693 virtual BasicType memory_type() const { return T_NARROWOOP; } |
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694 }; |
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695 |
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696 //------------------------------StoreNKlassNode-------------------------------------- |
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697 // Store narrow klass to memory |
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698 class StoreNKlassNode : public StoreNNode { |
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699 public: |
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700 StoreNKlassNode(Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val, MemOrd mo) |
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701 : StoreNNode(c, mem, adr, at, val, mo) {} |
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702 virtual int Opcode() const; |
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703 virtual BasicType memory_type() const { return T_NARROWKLASS; } |
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704 }; |
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705 |
0 | 706 //------------------------------StoreCMNode----------------------------------- |
707 // Store card-mark byte to memory for CM | |
708 // The last StoreCM before a SafePoint must be preserved and occur after its "oop" store | |
709 // Preceeding equivalent StoreCMs may be eliminated. | |
710 class StoreCMNode : public StoreNode { | |
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711 private: |
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712 virtual uint hash() const { return StoreNode::hash() + _oop_alias_idx; } |
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713 virtual uint cmp( const Node &n ) const { |
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714 return _oop_alias_idx == ((StoreCMNode&)n)._oop_alias_idx |
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715 && StoreNode::cmp(n); |
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716 } |
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717 virtual uint size_of() const { return sizeof(*this); } |
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718 int _oop_alias_idx; // The alias_idx of OopStore |
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719 |
0 | 720 public: |
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721 StoreCMNode( Node *c, Node *mem, Node *adr, const TypePtr* at, Node *val, Node *oop_store, int oop_alias_idx ) : |
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722 StoreNode(c, mem, adr, at, val, oop_store, MemNode::release), |
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723 _oop_alias_idx(oop_alias_idx) { |
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724 assert(_oop_alias_idx >= Compile::AliasIdxRaw || |
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725 _oop_alias_idx == Compile::AliasIdxBot && Compile::current()->AliasLevel() == 0, |
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726 "bad oop alias idx"); |
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727 } |
0 | 728 virtual int Opcode() const; |
729 virtual Node *Identity( PhaseTransform *phase ); | |
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730 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); |
0 | 731 virtual const Type *Value( PhaseTransform *phase ) const; |
732 virtual BasicType memory_type() const { return T_VOID; } // unspecific | |
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733 int oop_alias_idx() const { return _oop_alias_idx; } |
0 | 734 }; |
735 | |
736 //------------------------------LoadPLockedNode--------------------------------- | |
737 // Load-locked a pointer from memory (either object or array). | |
738 // On Sparc & Intel this is implemented as a normal pointer load. | |
739 // On PowerPC and friends it's a real load-locked. | |
740 class LoadPLockedNode : public LoadPNode { | |
741 public: | |
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742 LoadPLockedNode(Node *c, Node *mem, Node *adr, MemOrd mo) |
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743 : LoadPNode(c, mem, adr, TypeRawPtr::BOTTOM, TypeRawPtr::BOTTOM, mo) {} |
0 | 744 virtual int Opcode() const; |
745 virtual int store_Opcode() const { return Op_StorePConditional; } | |
746 virtual bool depends_only_on_test() const { return true; } | |
747 }; | |
748 | |
749 //------------------------------SCMemProjNode--------------------------------------- | |
750 // This class defines a projection of the memory state of a store conditional node. | |
751 // These nodes return a value, but also update memory. | |
752 class SCMemProjNode : public ProjNode { | |
753 public: | |
754 enum {SCMEMPROJCON = (uint)-2}; | |
755 SCMemProjNode( Node *src) : ProjNode( src, SCMEMPROJCON) { } | |
756 virtual int Opcode() const; | |
757 virtual bool is_CFG() const { return false; } | |
758 virtual const Type *bottom_type() const {return Type::MEMORY;} | |
759 virtual const TypePtr *adr_type() const { return in(0)->in(MemNode::Memory)->adr_type();} | |
760 virtual uint ideal_reg() const { return 0;} // memory projections don't have a register | |
761 virtual const Type *Value( PhaseTransform *phase ) const; | |
762 #ifndef PRODUCT | |
763 virtual void dump_spec(outputStream *st) const {}; | |
764 #endif | |
765 }; | |
766 | |
767 //------------------------------LoadStoreNode--------------------------- | |
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768 // Note: is_Mem() method returns 'true' for this class. |
0 | 769 class LoadStoreNode : public Node { |
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770 private: |
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771 const Type* const _type; // What kind of value is loaded? |
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772 const TypePtr* _adr_type; // What kind of memory is being addressed? |
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773 virtual uint size_of() const; // Size is bigger |
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774 public: |
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775 LoadStoreNode( Node *c, Node *mem, Node *adr, Node *val, const TypePtr* at, const Type* rt, uint required ); |
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776 virtual bool depends_only_on_test() const { return false; } |
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777 virtual uint match_edge(uint idx) const { return idx == MemNode::Address || idx == MemNode::ValueIn; } |
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778 |
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779 virtual const Type *bottom_type() const { return _type; } |
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780 virtual uint ideal_reg() const; |
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781 virtual const class TypePtr *adr_type() const { return _adr_type; } // returns bottom_type of address |
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782 |
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783 bool result_not_used() const; |
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784 }; |
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785 |
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786 class LoadStoreConditionalNode : public LoadStoreNode { |
0 | 787 public: |
788 enum { | |
789 ExpectedIn = MemNode::ValueIn+1 // One more input than MemNode | |
790 }; | |
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791 LoadStoreConditionalNode(Node *c, Node *mem, Node *adr, Node *val, Node *ex); |
0 | 792 }; |
793 | |
794 //------------------------------StorePConditionalNode--------------------------- | |
795 // Conditionally store pointer to memory, if no change since prior | |
796 // load-locked. Sets flags for success or failure of the store. | |
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797 class StorePConditionalNode : public LoadStoreConditionalNode { |
0 | 798 public: |
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799 StorePConditionalNode( Node *c, Node *mem, Node *adr, Node *val, Node *ll ) : LoadStoreConditionalNode(c, mem, adr, val, ll) { } |
0 | 800 virtual int Opcode() const; |
801 // Produces flags | |
802 virtual uint ideal_reg() const { return Op_RegFlags; } | |
803 }; | |
804 | |
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805 //------------------------------StoreIConditionalNode--------------------------- |
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806 // Conditionally store int to memory, if no change since prior |
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807 // load-locked. Sets flags for success or failure of the store. |
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808 class StoreIConditionalNode : public LoadStoreConditionalNode { |
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809 public: |
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810 StoreIConditionalNode( Node *c, Node *mem, Node *adr, Node *val, Node *ii ) : LoadStoreConditionalNode(c, mem, adr, val, ii) { } |
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811 virtual int Opcode() const; |
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812 // Produces flags |
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813 virtual uint ideal_reg() const { return Op_RegFlags; } |
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814 }; |
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815 |
0 | 816 //------------------------------StoreLConditionalNode--------------------------- |
817 // Conditionally store long to memory, if no change since prior | |
818 // load-locked. Sets flags for success or failure of the store. | |
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819 class StoreLConditionalNode : public LoadStoreConditionalNode { |
0 | 820 public: |
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821 StoreLConditionalNode( Node *c, Node *mem, Node *adr, Node *val, Node *ll ) : LoadStoreConditionalNode(c, mem, adr, val, ll) { } |
0 | 822 virtual int Opcode() const; |
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823 // Produces flags |
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824 virtual uint ideal_reg() const { return Op_RegFlags; } |
0 | 825 }; |
826 | |
827 | |
828 //------------------------------CompareAndSwapLNode--------------------------- | |
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829 class CompareAndSwapLNode : public LoadStoreConditionalNode { |
0 | 830 public: |
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831 CompareAndSwapLNode( Node *c, Node *mem, Node *adr, Node *val, Node *ex) : LoadStoreConditionalNode(c, mem, adr, val, ex) { } |
0 | 832 virtual int Opcode() const; |
833 }; | |
834 | |
835 | |
836 //------------------------------CompareAndSwapINode--------------------------- | |
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837 class CompareAndSwapINode : public LoadStoreConditionalNode { |
0 | 838 public: |
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839 CompareAndSwapINode( Node *c, Node *mem, Node *adr, Node *val, Node *ex) : LoadStoreConditionalNode(c, mem, adr, val, ex) { } |
0 | 840 virtual int Opcode() const; |
841 }; | |
842 | |
843 | |
844 //------------------------------CompareAndSwapPNode--------------------------- | |
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845 class CompareAndSwapPNode : public LoadStoreConditionalNode { |
0 | 846 public: |
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847 CompareAndSwapPNode( Node *c, Node *mem, Node *adr, Node *val, Node *ex) : LoadStoreConditionalNode(c, mem, adr, val, ex) { } |
0 | 848 virtual int Opcode() const; |
849 }; | |
850 | |
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851 //------------------------------CompareAndSwapNNode--------------------------- |
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852 class CompareAndSwapNNode : public LoadStoreConditionalNode { |
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853 public: |
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854 CompareAndSwapNNode( Node *c, Node *mem, Node *adr, Node *val, Node *ex) : LoadStoreConditionalNode(c, mem, adr, val, ex) { } |
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855 virtual int Opcode() const; |
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856 }; |
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857 |
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858 //------------------------------GetAndAddINode--------------------------- |
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859 class GetAndAddINode : public LoadStoreNode { |
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860 public: |
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861 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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862 virtual int Opcode() const; |
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863 }; |
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864 |
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865 //------------------------------GetAndAddLNode--------------------------- |
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866 class GetAndAddLNode : public LoadStoreNode { |
113
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867 public: |
6795
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868 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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869 virtual int Opcode() const; |
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870 }; |
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871 |
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872 |
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873 //------------------------------GetAndSetINode--------------------------- |
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874 class GetAndSetINode : public LoadStoreNode { |
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875 public: |
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876 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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877 virtual int Opcode() const; |
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878 }; |
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879 |
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880 //------------------------------GetAndSetINode--------------------------- |
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881 class GetAndSetLNode : public LoadStoreNode { |
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882 public: |
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883 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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884 virtual int Opcode() const; |
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885 }; |
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886 |
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887 //------------------------------GetAndSetPNode--------------------------- |
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888 class GetAndSetPNode : public LoadStoreNode { |
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889 public: |
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890 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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891 virtual int Opcode() const; |
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892 }; |
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893 |
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894 //------------------------------GetAndSetNNode--------------------------- |
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895 class GetAndSetNNode : public LoadStoreNode { |
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896 public: |
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897 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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898 virtual int Opcode() const; |
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899 }; |
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900 |
0 | 901 //------------------------------ClearArray------------------------------------- |
902 class ClearArrayNode: public Node { | |
903 public: | |
1100
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904 ClearArrayNode( Node *ctrl, Node *arymem, Node *word_cnt, Node *base ) |
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905 : Node(ctrl,arymem,word_cnt,base) { |
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906 init_class_id(Class_ClearArray); |
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907 } |
0 | 908 virtual int Opcode() const; |
909 virtual const Type *bottom_type() const { return Type::MEMORY; } | |
910 // ClearArray modifies array elements, and so affects only the | |
911 // array memory addressed by the bottom_type of its base address. | |
912 virtual const class TypePtr *adr_type() const; | |
913 virtual Node *Identity( PhaseTransform *phase ); | |
914 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
915 virtual uint match_edge(uint idx) const; | |
916 | |
917 // Clear the given area of an object or array. | |
918 // The start offset must always be aligned mod BytesPerInt. | |
919 // The end offset must always be aligned mod BytesPerLong. | |
920 // Return the new memory. | |
921 static Node* clear_memory(Node* control, Node* mem, Node* dest, | |
922 intptr_t start_offset, | |
923 intptr_t end_offset, | |
924 PhaseGVN* phase); | |
925 static Node* clear_memory(Node* control, Node* mem, Node* dest, | |
926 intptr_t start_offset, | |
927 Node* end_offset, | |
928 PhaseGVN* phase); | |
929 static Node* clear_memory(Node* control, Node* mem, Node* dest, | |
930 Node* start_offset, | |
931 Node* end_offset, | |
932 PhaseGVN* phase); | |
1100
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933 // Return allocation input memory edge if it is different instance |
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934 // or itself if it is the one we are looking for. |
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935 static bool step_through(Node** np, uint instance_id, PhaseTransform* phase); |
0 | 936 }; |
937 | |
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938 //------------------------------StrIntrinsic------------------------------- |
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939 // Base class for Ideal nodes used in String instrinsic code. |
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940 class StrIntrinsicNode: public Node { |
0 | 941 public: |
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942 StrIntrinsicNode(Node* control, Node* char_array_mem, |
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943 Node* s1, Node* c1, Node* s2, Node* c2): |
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944 Node(control, char_array_mem, s1, c1, s2, c2) { |
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945 } |
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946 |
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947 StrIntrinsicNode(Node* control, Node* char_array_mem, |
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948 Node* s1, Node* s2, Node* c): |
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949 Node(control, char_array_mem, s1, s2, c) { |
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950 } |
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951 |
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952 StrIntrinsicNode(Node* control, Node* char_array_mem, |
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953 Node* s1, Node* s2): |
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954 Node(control, char_array_mem, s1, s2) { |
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955 } |
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956 |
0 | 957 virtual bool depends_only_on_test() const { return false; } |
986
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958 virtual const TypePtr* adr_type() const { return TypeAryPtr::CHARS; } |
0 | 959 virtual uint match_edge(uint idx) const; |
960 virtual uint ideal_reg() const { return Op_RegI; } | |
961 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
4115 | 962 virtual const Type *Value(PhaseTransform *phase) const; |
0 | 963 }; |
964 | |
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965 //------------------------------StrComp------------------------------------- |
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966 class StrCompNode: public StrIntrinsicNode { |
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967 public: |
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968 StrCompNode(Node* control, Node* char_array_mem, |
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969 Node* s1, Node* c1, Node* s2, Node* c2): |
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970 StrIntrinsicNode(control, char_array_mem, s1, c1, s2, c2) {}; |
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971 virtual int Opcode() const; |
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972 virtual const Type* bottom_type() const { return TypeInt::INT; } |
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973 }; |
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974 |
681 | 975 //------------------------------StrEquals------------------------------------- |
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976 class StrEqualsNode: public StrIntrinsicNode { |
681 | 977 public: |
986
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978 StrEqualsNode(Node* control, Node* char_array_mem, |
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979 Node* s1, Node* s2, Node* c): |
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980 StrIntrinsicNode(control, char_array_mem, s1, s2, c) {}; |
681 | 981 virtual int Opcode() const; |
982 virtual const Type* bottom_type() const { return TypeInt::BOOL; } | |
983 }; | |
984 | |
985 //------------------------------StrIndexOf------------------------------------- | |
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986 class StrIndexOfNode: public StrIntrinsicNode { |
681 | 987 public: |
986
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988 StrIndexOfNode(Node* control, Node* char_array_mem, |
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989 Node* s1, Node* c1, Node* s2, Node* c2): |
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990 StrIntrinsicNode(control, char_array_mem, s1, c1, s2, c2) {}; |
681 | 991 virtual int Opcode() const; |
992 virtual const Type* bottom_type() const { return TypeInt::INT; } | |
993 }; | |
994 | |
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995 //------------------------------AryEq--------------------------------------- |
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996 class AryEqNode: public StrIntrinsicNode { |
169
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997 public: |
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998 AryEqNode(Node* control, Node* char_array_mem, Node* s1, Node* s2): |
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999 StrIntrinsicNode(control, char_array_mem, s1, s2) {}; |
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1000 virtual int Opcode() const; |
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1001 virtual const Type* bottom_type() const { return TypeInt::BOOL; } |
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1002 }; |
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1003 |
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1004 |
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1005 //------------------------------EncodeISOArray-------------------------------- |
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1006 // encode char[] to byte[] in ISO_8859_1 |
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1007 class EncodeISOArrayNode: public Node { |
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1008 public: |
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1009 EncodeISOArrayNode(Node *control, Node* arymem, Node* s1, Node* s2, Node* c): Node(control, arymem, s1, s2, c) {}; |
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1010 virtual int Opcode() const; |
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1011 virtual bool depends_only_on_test() const { return false; } |
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1012 virtual const Type* bottom_type() const { return TypeInt::INT; } |
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1013 virtual const TypePtr* adr_type() const { return TypePtr::BOTTOM; } |
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1014 virtual uint match_edge(uint idx) const; |
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1015 virtual uint ideal_reg() const { return Op_RegI; } |
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1016 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); |
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1017 virtual const Type *Value(PhaseTransform *phase) const; |
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1018 }; |
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1019 |
0 | 1020 //------------------------------MemBar----------------------------------------- |
1021 // There are different flavors of Memory Barriers to match the Java Memory | |
1022 // Model. Monitor-enter and volatile-load act as Aquires: no following ref | |
1023 // can be moved to before them. We insert a MemBar-Acquire after a FastLock or | |
1024 // volatile-load. Monitor-exit and volatile-store act as Release: no | |
605 | 1025 // preceding ref can be moved to after them. We insert a MemBar-Release |
0 | 1026 // before a FastUnlock or volatile-store. All volatiles need to be |
1027 // serialized, so we follow all volatile-stores with a MemBar-Volatile to | |
605 | 1028 // separate it from any following volatile-load. |
0 | 1029 class MemBarNode: public MultiNode { |
1030 virtual uint hash() const ; // { return NO_HASH; } | |
1031 virtual uint cmp( const Node &n ) const ; // Always fail, except on self | |
1032 | |
1033 virtual uint size_of() const { return sizeof(*this); } | |
1034 // Memory type this node is serializing. Usually either rawptr or bottom. | |
1035 const TypePtr* _adr_type; | |
1036 | |
1037 public: | |
1038 enum { | |
1039 Precedent = TypeFunc::Parms // optional edge to force precedence | |
1040 }; | |
1041 MemBarNode(Compile* C, int alias_idx, Node* precedent); | |
1042 virtual int Opcode() const = 0; | |
1043 virtual const class TypePtr *adr_type() const { return _adr_type; } | |
1044 virtual const Type *Value( PhaseTransform *phase ) const; | |
1045 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
1046 virtual uint match_edge(uint idx) const { return 0; } | |
1047 virtual const Type *bottom_type() const { return TypeTuple::MEMBAR; } | |
1048 virtual Node *match( const ProjNode *proj, const Matcher *m ); | |
1049 // Factory method. Builds a wide or narrow membar. | |
1050 // Optional 'precedent' becomes an extra edge if not null. | |
1051 static MemBarNode* make(Compile* C, int opcode, | |
1052 int alias_idx = Compile::AliasIdxBot, | |
1053 Node* precedent = NULL); | |
1054 }; | |
1055 | |
1056 // "Acquire" - no following ref can move before (but earlier refs can | |
1057 // follow, like an early Load stalled in cache). Requires multi-cpu | |
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1058 // visibility. Inserted after a volatile load. |
0 | 1059 class MemBarAcquireNode: public MemBarNode { |
1060 public: | |
1061 MemBarAcquireNode(Compile* C, int alias_idx, Node* precedent) | |
1062 : MemBarNode(C, alias_idx, precedent) {} | |
1063 virtual int Opcode() const; | |
1064 }; | |
1065 | |
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1066 // "Acquire" - no following ref can move before (but earlier refs can |
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1067 // follow, like an early Load stalled in cache). Requires multi-cpu |
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1068 // visibility. Inserted independ of any load, as required |
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1069 // for intrinsic sun.misc.Unsafe.loadFence(). |
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1070 class LoadFenceNode: public MemBarNode { |
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1071 public: |
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1072 LoadFenceNode(Compile* C, int alias_idx, Node* precedent) |
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1073 : MemBarNode(C, alias_idx, precedent) {} |
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1074 virtual int Opcode() const; |
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1075 }; |
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1076 |
0 | 1077 // "Release" - no earlier ref can move after (but later refs can move |
1078 // up, like a speculative pipelined cache-hitting Load). Requires | |
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1079 // multi-cpu visibility. Inserted before a volatile store. |
0 | 1080 class MemBarReleaseNode: public MemBarNode { |
1081 public: | |
1082 MemBarReleaseNode(Compile* C, int alias_idx, Node* precedent) | |
1083 : MemBarNode(C, alias_idx, precedent) {} | |
1084 virtual int Opcode() const; | |
1085 }; | |
1086 | |
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1087 // "Release" - no earlier ref can move after (but later refs can move |
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1088 // up, like a speculative pipelined cache-hitting Load). Requires |
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1089 // multi-cpu visibility. Inserted independent of any store, as required |
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1090 // for intrinsic sun.misc.Unsafe.storeFence(). |
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1091 class StoreFenceNode: public MemBarNode { |
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1092 public: |
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1093 StoreFenceNode(Compile* C, int alias_idx, Node* precedent) |
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1094 : MemBarNode(C, alias_idx, precedent) {} |
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1095 virtual int Opcode() const; |
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1096 }; |
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1097 |
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1098 // "Acquire" - no following ref can move before (but earlier refs can |
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1099 // follow, like an early Load stalled in cache). Requires multi-cpu |
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1100 // visibility. Inserted after a FastLock. |
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1101 class MemBarAcquireLockNode: public MemBarNode { |
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1102 public: |
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1103 MemBarAcquireLockNode(Compile* C, int alias_idx, Node* precedent) |
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1104 : MemBarNode(C, alias_idx, precedent) {} |
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1105 virtual int Opcode() const; |
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1106 }; |
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1107 |
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1108 // "Release" - no earlier ref can move after (but later refs can move |
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1109 // up, like a speculative pipelined cache-hitting Load). Requires |
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1110 // multi-cpu visibility. Inserted before a FastUnLock. |
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1111 class MemBarReleaseLockNode: public MemBarNode { |
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1112 public: |
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1113 MemBarReleaseLockNode(Compile* C, int alias_idx, Node* precedent) |
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1114 : MemBarNode(C, alias_idx, precedent) {} |
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1115 virtual int Opcode() const; |
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1116 }; |
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1117 |
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1118 class MemBarStoreStoreNode: public MemBarNode { |
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1119 public: |
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1120 MemBarStoreStoreNode(Compile* C, int alias_idx, Node* precedent) |
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1121 : MemBarNode(C, alias_idx, precedent) { |
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1122 init_class_id(Class_MemBarStoreStore); |
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1123 } |
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1124 virtual int Opcode() const; |
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1125 }; |
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1126 |
0 | 1127 // Ordering between a volatile store and a following volatile load. |
1128 // Requires multi-CPU visibility? | |
1129 class MemBarVolatileNode: public MemBarNode { | |
1130 public: | |
1131 MemBarVolatileNode(Compile* C, int alias_idx, Node* precedent) | |
1132 : MemBarNode(C, alias_idx, precedent) {} | |
1133 virtual int Opcode() const; | |
1134 }; | |
1135 | |
1136 // Ordering within the same CPU. Used to order unsafe memory references | |
1137 // inside the compiler when we lack alias info. Not needed "outside" the | |
1138 // compiler because the CPU does all the ordering for us. | |
1139 class MemBarCPUOrderNode: public MemBarNode { | |
1140 public: | |
1141 MemBarCPUOrderNode(Compile* C, int alias_idx, Node* precedent) | |
1142 : MemBarNode(C, alias_idx, precedent) {} | |
1143 virtual int Opcode() const; | |
1144 virtual uint ideal_reg() const { return 0; } // not matched in the AD file | |
1145 }; | |
1146 | |
1147 // Isolation of object setup after an AllocateNode and before next safepoint. | |
1148 // (See comment in memnode.cpp near InitializeNode::InitializeNode for semantics.) | |
1149 class InitializeNode: public MemBarNode { | |
1150 friend class AllocateNode; | |
1151 | |
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1152 enum { |
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1153 Incomplete = 0, |
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1154 Complete = 1, |
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1155 WithArraycopy = 2 |
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1156 }; |
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1157 int _is_complete; |
0 | 1158 |
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1159 bool _does_not_escape; |
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1160 |
0 | 1161 public: |
1162 enum { | |
1163 Control = TypeFunc::Control, | |
1164 Memory = TypeFunc::Memory, // MergeMem for states affected by this op | |
1165 RawAddress = TypeFunc::Parms+0, // the newly-allocated raw address | |
1166 RawStores = TypeFunc::Parms+1 // zero or more stores (or TOP) | |
1167 }; | |
1168 | |
1169 InitializeNode(Compile* C, int adr_type, Node* rawoop); | |
1170 virtual int Opcode() const; | |
1171 virtual uint size_of() const { return sizeof(*this); } | |
1172 virtual uint ideal_reg() const { return 0; } // not matched in the AD file | |
1173 virtual const RegMask &in_RegMask(uint) const; // mask for RawAddress | |
1174 | |
1175 // Manage incoming memory edges via a MergeMem on in(Memory): | |
1176 Node* memory(uint alias_idx); | |
1177 | |
1178 // The raw memory edge coming directly from the Allocation. | |
1179 // The contents of this memory are *always* all-zero-bits. | |
1180 Node* zero_memory() { return memory(Compile::AliasIdxRaw); } | |
1181 | |
1182 // Return the corresponding allocation for this initialization (or null if none). | |
1183 // (Note: Both InitializeNode::allocation and AllocateNode::initialization | |
1184 // are defined in graphKit.cpp, which sets up the bidirectional relation.) | |
1185 AllocateNode* allocation(); | |
1186 | |
1187 // Anything other than zeroing in this init? | |
1188 bool is_non_zero(); | |
1189 | |
1190 // An InitializeNode must completed before macro expansion is done. | |
1191 // Completion requires that the AllocateNode must be followed by | |
1192 // initialization of the new memory to zero, then to any initializers. | |
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1193 bool is_complete() { return _is_complete != Incomplete; } |
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1194 bool is_complete_with_arraycopy() { return (_is_complete & WithArraycopy) != 0; } |
0 | 1195 |
1196 // Mark complete. (Must not yet be complete.) | |
1197 void set_complete(PhaseGVN* phase); | |
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1198 void set_complete_with_arraycopy() { _is_complete = Complete | WithArraycopy; } |
0 | 1199 |
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1200 bool does_not_escape() { return _does_not_escape; } |
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1201 void set_does_not_escape() { _does_not_escape = true; } |
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1202 |
0 | 1203 #ifdef ASSERT |
1204 // ensure all non-degenerate stores are ordered and non-overlapping | |
1205 bool stores_are_sane(PhaseTransform* phase); | |
1206 #endif //ASSERT | |
1207 | |
1208 // See if this store can be captured; return offset where it initializes. | |
1209 // Return 0 if the store cannot be moved (any sort of problem). | |
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1210 intptr_t can_capture_store(StoreNode* st, PhaseTransform* phase, bool can_reshape); |
0 | 1211 |
1212 // Capture another store; reformat it to write my internal raw memory. | |
1213 // Return the captured copy, else NULL if there is some sort of problem. | |
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1214 Node* capture_store(StoreNode* st, intptr_t start, PhaseTransform* phase, bool can_reshape); |
0 | 1215 |
1216 // Find captured store which corresponds to the range [start..start+size). | |
1217 // Return my own memory projection (meaning the initial zero bits) | |
1218 // if there is no such store. Return NULL if there is a problem. | |
1219 Node* find_captured_store(intptr_t start, int size_in_bytes, PhaseTransform* phase); | |
1220 | |
1221 // Called when the associated AllocateNode is expanded into CFG. | |
1222 Node* complete_stores(Node* rawctl, Node* rawmem, Node* rawptr, | |
1223 intptr_t header_size, Node* size_in_bytes, | |
1224 PhaseGVN* phase); | |
1225 | |
1226 private: | |
1227 void remove_extra_zeroes(); | |
1228 | |
1229 // Find out where a captured store should be placed (or already is placed). | |
1230 int captured_store_insertion_point(intptr_t start, int size_in_bytes, | |
1231 PhaseTransform* phase); | |
1232 | |
1233 static intptr_t get_store_offset(Node* st, PhaseTransform* phase); | |
1234 | |
1235 Node* make_raw_address(intptr_t offset, PhaseTransform* phase); | |
1236 | |
10278 | 1237 bool detect_init_independence(Node* n, int& count); |
0 | 1238 |
1239 void coalesce_subword_stores(intptr_t header_size, Node* size_in_bytes, | |
1240 PhaseGVN* phase); | |
1241 | |
1242 intptr_t find_next_fullword_store(uint i, PhaseGVN* phase); | |
1243 }; | |
1244 | |
1245 //------------------------------MergeMem--------------------------------------- | |
1246 // (See comment in memnode.cpp near MergeMemNode::MergeMemNode for semantics.) | |
1247 class MergeMemNode: public Node { | |
1248 virtual uint hash() const ; // { return NO_HASH; } | |
1249 virtual uint cmp( const Node &n ) const ; // Always fail, except on self | |
1250 friend class MergeMemStream; | |
1251 MergeMemNode(Node* def); // clients use MergeMemNode::make | |
1252 | |
1253 public: | |
1254 // If the input is a whole memory state, clone it with all its slices intact. | |
1255 // Otherwise, make a new memory state with just that base memory input. | |
1256 // In either case, the result is a newly created MergeMem. | |
1257 static MergeMemNode* make(Compile* C, Node* base_memory); | |
1258 | |
1259 virtual int Opcode() const; | |
1260 virtual Node *Identity( PhaseTransform *phase ); | |
1261 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
1262 virtual uint ideal_reg() const { return NotAMachineReg; } | |
1263 virtual uint match_edge(uint idx) const { return 0; } | |
1264 virtual const RegMask &out_RegMask() const; | |
1265 virtual const Type *bottom_type() const { return Type::MEMORY; } | |
1266 virtual const TypePtr *adr_type() const { return TypePtr::BOTTOM; } | |
1267 // sparse accessors | |
1268 // Fetch the previously stored "set_memory_at", or else the base memory. | |
1269 // (Caller should clone it if it is a phi-nest.) | |
1270 Node* memory_at(uint alias_idx) const; | |
1271 // set the memory, regardless of its previous value | |
1272 void set_memory_at(uint alias_idx, Node* n); | |
1273 // the "base" is the memory that provides the non-finite support | |
1274 Node* base_memory() const { return in(Compile::AliasIdxBot); } | |
1275 // warning: setting the base can implicitly set any of the other slices too | |
1276 void set_base_memory(Node* def); | |
1277 // sentinel value which denotes a copy of the base memory: | |
1278 Node* empty_memory() const { return in(Compile::AliasIdxTop); } | |
1279 static Node* make_empty_memory(); // where the sentinel comes from | |
1280 bool is_empty_memory(Node* n) const { assert((n == empty_memory()) == n->is_top(), "sanity"); return n->is_top(); } | |
1281 // hook for the iterator, to perform any necessary setup | |
1282 void iteration_setup(const MergeMemNode* other = NULL); | |
1283 // push sentinels until I am at least as long as the other (semantic no-op) | |
1284 void grow_to_match(const MergeMemNode* other); | |
1285 bool verify_sparse() const PRODUCT_RETURN0; | |
1286 #ifndef PRODUCT | |
1287 virtual void dump_spec(outputStream *st) const; | |
1288 #endif | |
1289 }; | |
1290 | |
1291 class MergeMemStream : public StackObj { | |
1292 private: | |
1293 MergeMemNode* _mm; | |
1294 const MergeMemNode* _mm2; // optional second guy, contributes non-empty iterations | |
1295 Node* _mm_base; // loop-invariant base memory of _mm | |
1296 int _idx; | |
1297 int _cnt; | |
1298 Node* _mem; | |
1299 Node* _mem2; | |
1300 int _cnt2; | |
1301 | |
1302 void init(MergeMemNode* mm, const MergeMemNode* mm2 = NULL) { | |
1303 // subsume_node will break sparseness at times, whenever a memory slice | |
1304 // folds down to a copy of the base ("fat") memory. In such a case, | |
1305 // the raw edge will update to base, although it should be top. | |
1306 // This iterator will recognize either top or base_memory as an | |
1307 // "empty" slice. See is_empty, is_empty2, and next below. | |
1308 // | |
1309 // The sparseness property is repaired in MergeMemNode::Ideal. | |
1310 // As long as access to a MergeMem goes through this iterator | |
1311 // or the memory_at accessor, flaws in the sparseness will | |
1312 // never be observed. | |
1313 // | |
1314 // Also, iteration_setup repairs sparseness. | |
1315 assert(mm->verify_sparse(), "please, no dups of base"); | |
1316 assert(mm2==NULL || mm2->verify_sparse(), "please, no dups of base"); | |
1317 | |
1318 _mm = mm; | |
1319 _mm_base = mm->base_memory(); | |
1320 _mm2 = mm2; | |
1321 _cnt = mm->req(); | |
1322 _idx = Compile::AliasIdxBot-1; // start at the base memory | |
1323 _mem = NULL; | |
1324 _mem2 = NULL; | |
1325 } | |
1326 | |
1327 #ifdef ASSERT | |
1328 Node* check_memory() const { | |
1329 if (at_base_memory()) | |
1330 return _mm->base_memory(); | |
1331 else if ((uint)_idx < _mm->req() && !_mm->in(_idx)->is_top()) | |
1332 return _mm->memory_at(_idx); | |
1333 else | |
1334 return _mm_base; | |
1335 } | |
1336 Node* check_memory2() const { | |
1337 return at_base_memory()? _mm2->base_memory(): _mm2->memory_at(_idx); | |
1338 } | |
1339 #endif | |
1340 | |
1341 static bool match_memory(Node* mem, const MergeMemNode* mm, int idx) PRODUCT_RETURN0; | |
1342 void assert_synch() const { | |
1343 assert(!_mem || _idx >= _cnt || match_memory(_mem, _mm, _idx), | |
1344 "no side-effects except through the stream"); | |
1345 } | |
1346 | |
1347 public: | |
1348 | |
1349 // expected usages: | |
1350 // for (MergeMemStream mms(mem->is_MergeMem()); next_non_empty(); ) { ... } | |
1351 // for (MergeMemStream mms(mem1, mem2); next_non_empty2(); ) { ... } | |
1352 | |
1353 // iterate over one merge | |
1354 MergeMemStream(MergeMemNode* mm) { | |
1355 mm->iteration_setup(); | |
1356 init(mm); | |
1357 debug_only(_cnt2 = 999); | |
1358 } | |
1359 // iterate in parallel over two merges | |
1360 // only iterates through non-empty elements of mm2 | |
1361 MergeMemStream(MergeMemNode* mm, const MergeMemNode* mm2) { | |
1362 assert(mm2, "second argument must be a MergeMem also"); | |
1363 ((MergeMemNode*)mm2)->iteration_setup(); // update hidden state | |
1364 mm->iteration_setup(mm2); | |
1365 init(mm, mm2); | |
1366 _cnt2 = mm2->req(); | |
1367 } | |
1368 #ifdef ASSERT | |
1369 ~MergeMemStream() { | |
1370 assert_synch(); | |
1371 } | |
1372 #endif | |
1373 | |
1374 MergeMemNode* all_memory() const { | |
1375 return _mm; | |
1376 } | |
1377 Node* base_memory() const { | |
1378 assert(_mm_base == _mm->base_memory(), "no update to base memory, please"); | |
1379 return _mm_base; | |
1380 } | |
1381 const MergeMemNode* all_memory2() const { | |
1382 assert(_mm2 != NULL, ""); | |
1383 return _mm2; | |
1384 } | |
1385 bool at_base_memory() const { | |
1386 return _idx == Compile::AliasIdxBot; | |
1387 } | |
1388 int alias_idx() const { | |
1389 assert(_mem, "must call next 1st"); | |
1390 return _idx; | |
1391 } | |
1392 | |
1393 const TypePtr* adr_type() const { | |
1394 return Compile::current()->get_adr_type(alias_idx()); | |
1395 } | |
1396 | |
1397 const TypePtr* adr_type(Compile* C) const { | |
1398 return C->get_adr_type(alias_idx()); | |
1399 } | |
1400 bool is_empty() const { | |
1401 assert(_mem, "must call next 1st"); | |
1402 assert(_mem->is_top() == (_mem==_mm->empty_memory()), "correct sentinel"); | |
1403 return _mem->is_top(); | |
1404 } | |
1405 bool is_empty2() const { | |
1406 assert(_mem2, "must call next 1st"); | |
1407 assert(_mem2->is_top() == (_mem2==_mm2->empty_memory()), "correct sentinel"); | |
1408 return _mem2->is_top(); | |
1409 } | |
1410 Node* memory() const { | |
1411 assert(!is_empty(), "must not be empty"); | |
1412 assert_synch(); | |
1413 return _mem; | |
1414 } | |
1415 // get the current memory, regardless of empty or non-empty status | |
1416 Node* force_memory() const { | |
1417 assert(!is_empty() || !at_base_memory(), ""); | |
1418 // Use _mm_base to defend against updates to _mem->base_memory(). | |
1419 Node *mem = _mem->is_top() ? _mm_base : _mem; | |
1420 assert(mem == check_memory(), ""); | |
1421 return mem; | |
1422 } | |
1423 Node* memory2() const { | |
1424 assert(_mem2 == check_memory2(), ""); | |
1425 return _mem2; | |
1426 } | |
1427 void set_memory(Node* mem) { | |
1428 if (at_base_memory()) { | |
1429 // Note that this does not change the invariant _mm_base. | |
1430 _mm->set_base_memory(mem); | |
1431 } else { | |
1432 _mm->set_memory_at(_idx, mem); | |
1433 } | |
1434 _mem = mem; | |
1435 assert_synch(); | |
1436 } | |
1437 | |
1438 // Recover from a side effect to the MergeMemNode. | |
1439 void set_memory() { | |
1440 _mem = _mm->in(_idx); | |
1441 } | |
1442 | |
1443 bool next() { return next(false); } | |
1444 bool next2() { return next(true); } | |
1445 | |
1446 bool next_non_empty() { return next_non_empty(false); } | |
1447 bool next_non_empty2() { return next_non_empty(true); } | |
1448 // next_non_empty2 can yield states where is_empty() is true | |
1449 | |
1450 private: | |
1451 // find the next item, which might be empty | |
1452 bool next(bool have_mm2) { | |
1453 assert((_mm2 != NULL) == have_mm2, "use other next"); | |
1454 assert_synch(); | |
1455 if (++_idx < _cnt) { | |
1456 // Note: This iterator allows _mm to be non-sparse. | |
1457 // It behaves the same whether _mem is top or base_memory. | |
1458 _mem = _mm->in(_idx); | |
1459 if (have_mm2) | |
1460 _mem2 = _mm2->in((_idx < _cnt2) ? _idx : Compile::AliasIdxTop); | |
1461 return true; | |
1462 } | |
1463 return false; | |
1464 } | |
1465 | |
1466 // find the next non-empty item | |
1467 bool next_non_empty(bool have_mm2) { | |
1468 while (next(have_mm2)) { | |
1469 if (!is_empty()) { | |
1470 // make sure _mem2 is filled in sensibly | |
1471 if (have_mm2 && _mem2->is_top()) _mem2 = _mm2->base_memory(); | |
1472 return true; | |
1473 } else if (have_mm2 && !is_empty2()) { | |
1474 return true; // is_empty() == true | |
1475 } | |
1476 } | |
1477 return false; | |
1478 } | |
1479 }; | |
1480 | |
1481 //------------------------------Prefetch--------------------------------------- | |
1482 | |
1483 // Non-faulting prefetch load. Prefetch for many reads. | |
1484 class PrefetchReadNode : public Node { | |
1485 public: | |
1486 PrefetchReadNode(Node *abio, Node *adr) : Node(0,abio,adr) {} | |
1487 virtual int Opcode() const; | |
1488 virtual uint ideal_reg() const { return NotAMachineReg; } | |
1489 virtual uint match_edge(uint idx) const { return idx==2; } | |
1490 virtual const Type *bottom_type() const { return Type::ABIO; } | |
1491 }; | |
1492 | |
1493 // Non-faulting prefetch load. Prefetch for many reads & many writes. | |
1494 class PrefetchWriteNode : public Node { | |
1495 public: | |
1496 PrefetchWriteNode(Node *abio, Node *adr) : Node(0,abio,adr) {} | |
1497 virtual int Opcode() const; | |
1498 virtual uint ideal_reg() const { return NotAMachineReg; } | |
1499 virtual uint match_edge(uint idx) const { return idx==2; } | |
3854 | 1500 virtual const Type *bottom_type() const { return Type::ABIO; } |
1501 }; | |
1502 | |
1503 // Allocation prefetch which may fault, TLAB size have to be adjusted. | |
1504 class PrefetchAllocationNode : public Node { | |
1505 public: | |
1506 PrefetchAllocationNode(Node *mem, Node *adr) : Node(0,mem,adr) {} | |
1507 virtual int Opcode() const; | |
1508 virtual uint ideal_reg() const { return NotAMachineReg; } | |
1509 virtual uint match_edge(uint idx) const { return idx==2; } | |
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1510 virtual const Type *bottom_type() const { return ( AllocatePrefetchStyle == 3 ) ? Type::MEMORY : Type::ABIO; } |
0 | 1511 }; |
1972 | 1512 |
1513 #endif // SHARE_VM_OPTO_MEMNODE_HPP |