Mercurial > hg > truffle
annotate src/share/vm/opto/callnode.hpp @ 14714:b602356a9cfc
additional canonicalizers for accesses and value nodes (improves number of implicit null checks)
author | Lukas Stadler <lukas.stadler@oracle.com> |
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date | Thu, 20 Mar 2014 17:15:36 +0100 |
parents | ad6695638a35 |
children | 4ca6dc0799b6 0bf37f737702 |
rev | line source |
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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_CALLNODE_HPP |
26 #define SHARE_VM_OPTO_CALLNODE_HPP | |
27 | |
28 #include "opto/connode.hpp" | |
29 #include "opto/mulnode.hpp" | |
30 #include "opto/multnode.hpp" | |
31 #include "opto/opcodes.hpp" | |
32 #include "opto/phaseX.hpp" | |
33 #include "opto/type.hpp" | |
34 | |
0 | 35 // Portions of code courtesy of Clifford Click |
36 | |
37 // Optimization - Graph Style | |
38 | |
39 class Chaitin; | |
40 class NamedCounter; | |
41 class MultiNode; | |
42 class SafePointNode; | |
43 class CallNode; | |
44 class CallJavaNode; | |
45 class CallStaticJavaNode; | |
46 class CallDynamicJavaNode; | |
47 class CallRuntimeNode; | |
48 class CallLeafNode; | |
49 class CallLeafNoFPNode; | |
50 class AllocateNode; | |
33 | 51 class AllocateArrayNode; |
10278 | 52 class BoxLockNode; |
0 | 53 class LockNode; |
54 class UnlockNode; | |
55 class JVMState; | |
56 class OopMap; | |
57 class State; | |
58 class StartNode; | |
59 class MachCallNode; | |
60 class FastLockNode; | |
61 | |
62 //------------------------------StartNode-------------------------------------- | |
63 // The method start node | |
64 class StartNode : public MultiNode { | |
65 virtual uint cmp( const Node &n ) const; | |
66 virtual uint size_of() const; // Size is bigger | |
67 public: | |
68 const TypeTuple *_domain; | |
69 StartNode( Node *root, const TypeTuple *domain ) : MultiNode(2), _domain(domain) { | |
70 init_class_id(Class_Start); | |
71 init_req(0,this); | |
72 init_req(1,root); | |
73 } | |
74 virtual int Opcode() const; | |
75 virtual bool pinned() const { return true; }; | |
76 virtual const Type *bottom_type() const; | |
77 virtual const TypePtr *adr_type() const { return TypePtr::BOTTOM; } | |
78 virtual const Type *Value( PhaseTransform *phase ) const; | |
79 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
80 virtual void calling_convention( BasicType* sig_bt, VMRegPair *parm_reg, uint length ) const; | |
81 virtual const RegMask &in_RegMask(uint) const; | |
82 virtual Node *match( const ProjNode *proj, const Matcher *m ); | |
83 virtual uint ideal_reg() const { return 0; } | |
84 #ifndef PRODUCT | |
85 virtual void dump_spec(outputStream *st) const; | |
86 #endif | |
87 }; | |
88 | |
89 //------------------------------StartOSRNode----------------------------------- | |
90 // The method start node for on stack replacement code | |
91 class StartOSRNode : public StartNode { | |
92 public: | |
93 StartOSRNode( Node *root, const TypeTuple *domain ) : StartNode(root, domain) {} | |
94 virtual int Opcode() const; | |
95 static const TypeTuple *osr_domain(); | |
96 }; | |
97 | |
98 | |
99 //------------------------------ParmNode--------------------------------------- | |
100 // Incoming parameters | |
101 class ParmNode : public ProjNode { | |
102 static const char * const names[TypeFunc::Parms+1]; | |
103 public: | |
33 | 104 ParmNode( StartNode *src, uint con ) : ProjNode(src,con) { |
105 init_class_id(Class_Parm); | |
106 } | |
0 | 107 virtual int Opcode() const; |
108 virtual bool is_CFG() const { return (_con == TypeFunc::Control); } | |
109 virtual uint ideal_reg() const; | |
110 #ifndef PRODUCT | |
111 virtual void dump_spec(outputStream *st) const; | |
112 #endif | |
113 }; | |
114 | |
115 | |
116 //------------------------------ReturnNode------------------------------------- | |
117 // Return from subroutine node | |
118 class ReturnNode : public Node { | |
119 public: | |
120 ReturnNode( uint edges, Node *cntrl, Node *i_o, Node *memory, Node *retadr, Node *frameptr ); | |
121 virtual int Opcode() const; | |
122 virtual bool is_CFG() const { return true; } | |
123 virtual uint hash() const { return NO_HASH; } // CFG nodes do not hash | |
124 virtual bool depends_only_on_test() const { return false; } | |
125 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
126 virtual const Type *Value( PhaseTransform *phase ) const; | |
127 virtual uint ideal_reg() const { return NotAMachineReg; } | |
128 virtual uint match_edge(uint idx) const; | |
129 #ifndef PRODUCT | |
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130 virtual void dump_req(outputStream *st = tty) const; |
0 | 131 #endif |
132 }; | |
133 | |
134 | |
135 //------------------------------RethrowNode------------------------------------ | |
136 // Rethrow of exception at call site. Ends a procedure before rethrowing; | |
137 // ends the current basic block like a ReturnNode. Restores registers and | |
138 // unwinds stack. Rethrow happens in the caller's method. | |
139 class RethrowNode : public Node { | |
140 public: | |
141 RethrowNode( Node *cntrl, Node *i_o, Node *memory, Node *frameptr, Node *ret_adr, Node *exception ); | |
142 virtual int Opcode() const; | |
143 virtual bool is_CFG() const { return true; } | |
144 virtual uint hash() const { return NO_HASH; } // CFG nodes do not hash | |
145 virtual bool depends_only_on_test() const { return false; } | |
146 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
147 virtual const Type *Value( PhaseTransform *phase ) const; | |
148 virtual uint match_edge(uint idx) const; | |
149 virtual uint ideal_reg() const { return NotAMachineReg; } | |
150 #ifndef PRODUCT | |
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151 virtual void dump_req(outputStream *st = tty) const; |
0 | 152 #endif |
153 }; | |
154 | |
155 | |
156 //------------------------------TailCallNode----------------------------------- | |
157 // Pop stack frame and jump indirect | |
158 class TailCallNode : public ReturnNode { | |
159 public: | |
160 TailCallNode( Node *cntrl, Node *i_o, Node *memory, Node *frameptr, Node *retadr, Node *target, Node *moop ) | |
161 : ReturnNode( TypeFunc::Parms+2, cntrl, i_o, memory, frameptr, retadr ) { | |
162 init_req(TypeFunc::Parms, target); | |
163 init_req(TypeFunc::Parms+1, moop); | |
164 } | |
165 | |
166 virtual int Opcode() const; | |
167 virtual uint match_edge(uint idx) const; | |
168 }; | |
169 | |
170 //------------------------------TailJumpNode----------------------------------- | |
171 // Pop stack frame and jump indirect | |
172 class TailJumpNode : public ReturnNode { | |
173 public: | |
174 TailJumpNode( Node *cntrl, Node *i_o, Node *memory, Node *frameptr, Node *target, Node *ex_oop) | |
175 : ReturnNode(TypeFunc::Parms+2, cntrl, i_o, memory, frameptr, Compile::current()->top()) { | |
176 init_req(TypeFunc::Parms, target); | |
177 init_req(TypeFunc::Parms+1, ex_oop); | |
178 } | |
179 | |
180 virtual int Opcode() const; | |
181 virtual uint match_edge(uint idx) const; | |
182 }; | |
183 | |
184 //-------------------------------JVMState------------------------------------- | |
185 // A linked list of JVMState nodes captures the whole interpreter state, | |
186 // plus GC roots, for all active calls at some call site in this compilation | |
187 // unit. (If there is no inlining, then the list has exactly one link.) | |
188 // This provides a way to map the optimized program back into the interpreter, | |
189 // or to let the GC mark the stack. | |
190 class JVMState : public ResourceObj { | |
3939 | 191 friend class VMStructs; |
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192 public: |
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193 typedef enum { |
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194 Reexecute_Undefined = -1, // not defined -- will be translated into false later |
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195 Reexecute_False = 0, // false -- do not reexecute |
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196 Reexecute_True = 1 // true -- reexecute the bytecode |
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197 } ReexecuteState; //Reexecute State |
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198 |
0 | 199 private: |
200 JVMState* _caller; // List pointer for forming scope chains | |
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201 uint _depth; // One more than caller depth, or one. |
0 | 202 uint _locoff; // Offset to locals in input edge mapping |
203 uint _stkoff; // Offset to stack in input edge mapping | |
204 uint _monoff; // Offset to monitors in input edge mapping | |
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205 uint _scloff; // Offset to fields of scalar objs in input edge mapping |
0 | 206 uint _endoff; // Offset to end of input edge mapping |
207 uint _sp; // Jave Expression Stack Pointer for this state | |
208 int _bci; // Byte Code Index of this JVM point | |
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209 ReexecuteState _reexecute; // Whether this bytecode need to be re-executed |
0 | 210 ciMethod* _method; // Method Pointer |
211 SafePointNode* _map; // Map node associated with this scope | |
212 public: | |
213 friend class Compile; | |
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214 friend class PreserveReexecuteState; |
0 | 215 |
216 // Because JVMState objects live over the entire lifetime of the | |
217 // Compile object, they are allocated into the comp_arena, which | |
218 // does not get resource marked or reset during the compile process | |
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219 void *operator new( size_t x, Compile* C ) throw() { return C->comp_arena()->Amalloc(x); } |
0 | 220 void operator delete( void * ) { } // fast deallocation |
221 | |
222 // Create a new JVMState, ready for abstract interpretation. | |
223 JVMState(ciMethod* method, JVMState* caller); | |
224 JVMState(int stack_size); // root state; has a null method | |
225 | |
226 // Access functions for the JVM | |
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227 // ... --|--- loc ---|--- stk ---|--- arg ---|--- mon ---|--- scl ---| |
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228 // \ locoff \ stkoff \ argoff \ monoff \ scloff \ endoff |
0 | 229 uint locoff() const { return _locoff; } |
230 uint stkoff() const { return _stkoff; } | |
231 uint argoff() const { return _stkoff + _sp; } | |
232 uint monoff() const { return _monoff; } | |
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233 uint scloff() const { return _scloff; } |
0 | 234 uint endoff() const { return _endoff; } |
235 uint oopoff() const { return debug_end(); } | |
236 | |
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237 int loc_size() const { return stkoff() - locoff(); } |
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238 int stk_size() const { return monoff() - stkoff(); } |
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239 int mon_size() const { return scloff() - monoff(); } |
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240 int scl_size() const { return endoff() - scloff(); } |
0 | 241 |
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242 bool is_loc(uint i) const { return locoff() <= i && i < stkoff(); } |
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243 bool is_stk(uint i) const { return stkoff() <= i && i < monoff(); } |
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244 bool is_mon(uint i) const { return monoff() <= i && i < scloff(); } |
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245 bool is_scl(uint i) const { return scloff() <= i && i < endoff(); } |
0 | 246 |
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247 uint sp() const { return _sp; } |
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248 int bci() const { return _bci; } |
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249 bool should_reexecute() const { return _reexecute==Reexecute_True; } |
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250 bool is_reexecute_undefined() const { return _reexecute==Reexecute_Undefined; } |
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251 bool has_method() const { return _method != NULL; } |
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252 ciMethod* method() const { assert(has_method(), ""); return _method; } |
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253 JVMState* caller() const { return _caller; } |
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254 SafePointNode* map() const { return _map; } |
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255 uint depth() const { return _depth; } |
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256 uint debug_start() const; // returns locoff of root caller |
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257 uint debug_end() const; // returns endoff of self |
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258 uint debug_size() const { |
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259 return loc_size() + sp() + mon_size() + scl_size(); |
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260 } |
0 | 261 uint debug_depth() const; // returns sum of debug_size values at all depths |
262 | |
263 // Returns the JVM state at the desired depth (1 == root). | |
264 JVMState* of_depth(int d) const; | |
265 | |
266 // Tells if two JVM states have the same call chain (depth, methods, & bcis). | |
267 bool same_calls_as(const JVMState* that) const; | |
268 | |
269 // Monitors (monitors are stored as (boxNode, objNode) pairs | |
270 enum { logMonitorEdges = 1 }; | |
271 int nof_monitors() const { return mon_size() >> logMonitorEdges; } | |
272 int monitor_depth() const { return nof_monitors() + (caller() ? caller()->monitor_depth() : 0); } | |
273 int monitor_box_offset(int idx) const { return monoff() + (idx << logMonitorEdges) + 0; } | |
274 int monitor_obj_offset(int idx) const { return monoff() + (idx << logMonitorEdges) + 1; } | |
275 bool is_monitor_box(uint off) const { | |
276 assert(is_mon(off), "should be called only for monitor edge"); | |
277 return (0 == bitfield(off - monoff(), 0, logMonitorEdges)); | |
278 } | |
279 bool is_monitor_use(uint off) const { return (is_mon(off) | |
280 && is_monitor_box(off)) | |
281 || (caller() && caller()->is_monitor_use(off)); } | |
282 | |
283 // Initialization functions for the JVM | |
284 void set_locoff(uint off) { _locoff = off; } | |
285 void set_stkoff(uint off) { _stkoff = off; } | |
286 void set_monoff(uint off) { _monoff = off; } | |
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287 void set_scloff(uint off) { _scloff = off; } |
0 | 288 void set_endoff(uint off) { _endoff = off; } |
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289 void set_offsets(uint off) { |
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290 _locoff = _stkoff = _monoff = _scloff = _endoff = off; |
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291 } |
0 | 292 void set_map(SafePointNode *map) { _map = map; } |
293 void set_sp(uint sp) { _sp = sp; } | |
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294 // _reexecute is initialized to "undefined" for a new bci |
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295 void set_bci(int bci) {if(_bci != bci)_reexecute=Reexecute_Undefined; _bci = bci; } |
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296 void set_should_reexecute(bool reexec) {_reexecute = reexec ? Reexecute_True : Reexecute_False;} |
0 | 297 |
298 // Miscellaneous utility functions | |
299 JVMState* clone_deep(Compile* C) const; // recursively clones caller chain | |
300 JVMState* clone_shallow(Compile* C) const; // retains uncloned caller | |
10278 | 301 void set_map_deep(SafePointNode *map);// reset map for all callers |
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302 void adapt_position(int delta); // Adapt offsets in in-array after adding an edge. |
0 | 303 |
304 #ifndef PRODUCT | |
305 void format(PhaseRegAlloc *regalloc, const Node *n, outputStream* st) const; | |
306 void dump_spec(outputStream *st) const; | |
307 void dump_on(outputStream* st) const; | |
308 void dump() const { | |
309 dump_on(tty); | |
310 } | |
311 #endif | |
312 }; | |
313 | |
314 //------------------------------SafePointNode---------------------------------- | |
315 // A SafePointNode is a subclass of a MultiNode for convenience (and | |
316 // potential code sharing) only - conceptually it is independent of | |
317 // the Node semantics. | |
318 class SafePointNode : public MultiNode { | |
319 virtual uint cmp( const Node &n ) const; | |
320 virtual uint size_of() const; // Size is bigger | |
321 | |
322 public: | |
323 SafePointNode(uint edges, JVMState* jvms, | |
324 // A plain safepoint advertises no memory effects (NULL): | |
325 const TypePtr* adr_type = NULL) | |
326 : MultiNode( edges ), | |
327 _jvms(jvms), | |
328 _oop_map(NULL), | |
329 _adr_type(adr_type) | |
330 { | |
331 init_class_id(Class_SafePoint); | |
332 } | |
333 | |
334 OopMap* _oop_map; // Array of OopMap info (8-bit char) for GC | |
335 JVMState* const _jvms; // Pointer to list of JVM State objects | |
336 const TypePtr* _adr_type; // What type of memory does this node produce? | |
337 | |
338 // Many calls take *all* of memory as input, | |
339 // but some produce a limited subset of that memory as output. | |
340 // The adr_type reports the call's behavior as a store, not a load. | |
341 | |
342 virtual JVMState* jvms() const { return _jvms; } | |
343 void set_jvms(JVMState* s) { | |
344 *(JVMState**)&_jvms = s; // override const attribute in the accessor | |
345 } | |
346 OopMap *oop_map() const { return _oop_map; } | |
347 void set_oop_map(OopMap *om) { _oop_map = om; } | |
348 | |
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349 private: |
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350 void verify_input(JVMState* jvms, uint idx) const { |
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351 assert(verify_jvms(jvms), "jvms must match"); |
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352 Node* n = in(idx); |
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353 assert((!n->bottom_type()->isa_long() && !n->bottom_type()->isa_double()) || |
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354 in(idx + 1)->is_top(), "2nd half of long/double"); |
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355 } |
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356 |
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357 public: |
0 | 358 // Functionality from old debug nodes which has changed |
359 Node *local(JVMState* jvms, uint idx) const { | |
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360 verify_input(jvms, jvms->locoff() + idx); |
0 | 361 return in(jvms->locoff() + idx); |
362 } | |
363 Node *stack(JVMState* jvms, uint idx) const { | |
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364 verify_input(jvms, jvms->stkoff() + idx); |
0 | 365 return in(jvms->stkoff() + idx); |
366 } | |
367 Node *argument(JVMState* jvms, uint idx) const { | |
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368 verify_input(jvms, jvms->argoff() + idx); |
0 | 369 return in(jvms->argoff() + idx); |
370 } | |
371 Node *monitor_box(JVMState* jvms, uint idx) const { | |
372 assert(verify_jvms(jvms), "jvms must match"); | |
373 return in(jvms->monitor_box_offset(idx)); | |
374 } | |
375 Node *monitor_obj(JVMState* jvms, uint idx) const { | |
376 assert(verify_jvms(jvms), "jvms must match"); | |
377 return in(jvms->monitor_obj_offset(idx)); | |
378 } | |
379 | |
380 void set_local(JVMState* jvms, uint idx, Node *c); | |
381 | |
382 void set_stack(JVMState* jvms, uint idx, Node *c) { | |
383 assert(verify_jvms(jvms), "jvms must match"); | |
384 set_req(jvms->stkoff() + idx, c); | |
385 } | |
386 void set_argument(JVMState* jvms, uint idx, Node *c) { | |
387 assert(verify_jvms(jvms), "jvms must match"); | |
388 set_req(jvms->argoff() + idx, c); | |
389 } | |
390 void ensure_stack(JVMState* jvms, uint stk_size) { | |
391 assert(verify_jvms(jvms), "jvms must match"); | |
392 int grow_by = (int)stk_size - (int)jvms->stk_size(); | |
393 if (grow_by > 0) grow_stack(jvms, grow_by); | |
394 } | |
395 void grow_stack(JVMState* jvms, uint grow_by); | |
396 // Handle monitor stack | |
397 void push_monitor( const FastLockNode *lock ); | |
398 void pop_monitor (); | |
399 Node *peek_monitor_box() const; | |
400 Node *peek_monitor_obj() const; | |
401 | |
402 // Access functions for the JVM | |
403 Node *control () const { return in(TypeFunc::Control ); } | |
404 Node *i_o () const { return in(TypeFunc::I_O ); } | |
405 Node *memory () const { return in(TypeFunc::Memory ); } | |
406 Node *returnadr() const { return in(TypeFunc::ReturnAdr); } | |
407 Node *frameptr () const { return in(TypeFunc::FramePtr ); } | |
408 | |
409 void set_control ( Node *c ) { set_req(TypeFunc::Control,c); } | |
410 void set_i_o ( Node *c ) { set_req(TypeFunc::I_O ,c); } | |
411 void set_memory ( Node *c ) { set_req(TypeFunc::Memory ,c); } | |
412 | |
413 MergeMemNode* merged_memory() const { | |
414 return in(TypeFunc::Memory)->as_MergeMem(); | |
415 } | |
416 | |
417 // The parser marks useless maps as dead when it's done with them: | |
418 bool is_killed() { return in(TypeFunc::Control) == NULL; } | |
419 | |
420 // Exception states bubbling out of subgraphs such as inlined calls | |
421 // are recorded here. (There might be more than one, hence the "next".) | |
422 // This feature is used only for safepoints which serve as "maps" | |
423 // for JVM states during parsing, intrinsic expansion, etc. | |
424 SafePointNode* next_exception() const; | |
425 void set_next_exception(SafePointNode* n); | |
426 bool has_exceptions() const { return next_exception() != NULL; } | |
427 | |
428 // Standard Node stuff | |
429 virtual int Opcode() const; | |
430 virtual bool pinned() const { return true; } | |
431 virtual const Type *Value( PhaseTransform *phase ) const; | |
432 virtual const Type *bottom_type() const { return Type::CONTROL; } | |
433 virtual const TypePtr *adr_type() const { return _adr_type; } | |
434 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
435 virtual Node *Identity( PhaseTransform *phase ); | |
436 virtual uint ideal_reg() const { return 0; } | |
437 virtual const RegMask &in_RegMask(uint) const; | |
438 virtual const RegMask &out_RegMask() const; | |
439 virtual uint match_edge(uint idx) const; | |
440 | |
441 static bool needs_polling_address_input(); | |
442 | |
443 #ifndef PRODUCT | |
10278 | 444 virtual void dump_spec(outputStream *st) const; |
0 | 445 #endif |
446 }; | |
447 | |
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448 //------------------------------SafePointScalarObjectNode---------------------- |
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449 // A SafePointScalarObjectNode represents the state of a scalarized object |
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450 // at a safepoint. |
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451 |
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452 class SafePointScalarObjectNode: public TypeNode { |
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453 uint _first_index; // First input edge relative index of a SafePoint node where |
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454 // states of the scalarized object fields are collected. |
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455 // It is relative to the last (youngest) jvms->_scloff. |
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456 uint _n_fields; // Number of non-static fields of the scalarized object. |
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457 DEBUG_ONLY(AllocateNode* _alloc;) |
4115 | 458 |
459 virtual uint hash() const ; // { return NO_HASH; } | |
460 virtual uint cmp( const Node &n ) const; | |
461 | |
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462 uint first_index() const { return _first_index; } |
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463 |
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464 public: |
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465 SafePointScalarObjectNode(const TypeOopPtr* tp, |
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466 #ifdef ASSERT |
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467 AllocateNode* alloc, |
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468 #endif |
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469 uint first_index, uint n_fields); |
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470 virtual int Opcode() const; |
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471 virtual uint ideal_reg() const; |
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472 virtual const RegMask &in_RegMask(uint) const; |
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473 virtual const RegMask &out_RegMask() const; |
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474 virtual uint match_edge(uint idx) const; |
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475 |
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476 uint first_index(JVMState* jvms) const { |
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477 assert(jvms != NULL, "missed JVMS"); |
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478 return jvms->scloff() + _first_index; |
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479 } |
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480 uint n_fields() const { return _n_fields; } |
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481 |
4115 | 482 #ifdef ASSERT |
483 AllocateNode* alloc() const { return _alloc; } | |
484 #endif | |
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485 |
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486 virtual uint size_of() const { return sizeof(*this); } |
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487 |
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488 // Assumes that "this" is an argument to a safepoint node "s", and that |
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489 // "new_call" is being created to correspond to "s". But the difference |
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490 // between the start index of the jvmstates of "new_call" and "s" is |
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491 // "jvms_adj". Produce and return a SafePointScalarObjectNode that |
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492 // corresponds appropriately to "this" in "new_call". Assumes that |
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493 // "sosn_map" is a map, specific to the translation of "s" to "new_call", |
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494 // mapping old SafePointScalarObjectNodes to new, to avoid multiple copies. |
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495 SafePointScalarObjectNode* clone(Dict* sosn_map) const; |
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496 |
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497 #ifndef PRODUCT |
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498 virtual void dump_spec(outputStream *st) const; |
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499 #endif |
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500 }; |
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501 |
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502 |
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503 // Simple container for the outgoing projections of a call. Useful |
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504 // for serious surgery on calls. |
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505 class CallProjections : public StackObj { |
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506 public: |
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507 Node* fallthrough_proj; |
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508 Node* fallthrough_catchproj; |
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509 Node* fallthrough_memproj; |
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510 Node* fallthrough_ioproj; |
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511 Node* catchall_catchproj; |
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512 Node* catchall_memproj; |
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513 Node* catchall_ioproj; |
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514 Node* resproj; |
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515 Node* exobj; |
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516 }; |
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517 |
7473 | 518 class CallGenerator; |
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519 |
0 | 520 //------------------------------CallNode--------------------------------------- |
521 // Call nodes now subsume the function of debug nodes at callsites, so they | |
522 // contain the functionality of a full scope chain of debug nodes. | |
523 class CallNode : public SafePointNode { | |
3939 | 524 friend class VMStructs; |
0 | 525 public: |
526 const TypeFunc *_tf; // Function type | |
527 address _entry_point; // Address of method being called | |
528 float _cnt; // Estimate of number of times called | |
7473 | 529 CallGenerator* _generator; // corresponding CallGenerator for some late inline calls |
0 | 530 |
531 CallNode(const TypeFunc* tf, address addr, const TypePtr* adr_type) | |
532 : SafePointNode(tf->domain()->cnt(), NULL, adr_type), | |
533 _tf(tf), | |
534 _entry_point(addr), | |
7473 | 535 _cnt(COUNT_UNKNOWN), |
536 _generator(NULL) | |
0 | 537 { |
538 init_class_id(Class_Call); | |
539 } | |
540 | |
7473 | 541 const TypeFunc* tf() const { return _tf; } |
542 const address entry_point() const { return _entry_point; } | |
543 const float cnt() const { return _cnt; } | |
544 CallGenerator* generator() const { return _generator; } | |
0 | 545 |
7473 | 546 void set_tf(const TypeFunc* tf) { _tf = tf; } |
547 void set_entry_point(address p) { _entry_point = p; } | |
548 void set_cnt(float c) { _cnt = c; } | |
549 void set_generator(CallGenerator* cg) { _generator = cg; } | |
0 | 550 |
551 virtual const Type *bottom_type() const; | |
552 virtual const Type *Value( PhaseTransform *phase ) const; | |
7473 | 553 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); |
0 | 554 virtual Node *Identity( PhaseTransform *phase ) { return this; } |
555 virtual uint cmp( const Node &n ) const; | |
556 virtual uint size_of() const = 0; | |
557 virtual void calling_convention( BasicType* sig_bt, VMRegPair *parm_regs, uint argcnt ) const; | |
558 virtual Node *match( const ProjNode *proj, const Matcher *m ); | |
559 virtual uint ideal_reg() const { return NotAMachineReg; } | |
560 // Are we guaranteed that this node is a safepoint? Not true for leaf calls and | |
561 // for some macro nodes whose expansion does not have a safepoint on the fast path. | |
562 virtual bool guaranteed_safepoint() { return true; } | |
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563 // For macro nodes, the JVMState gets modified during expansion. If calls |
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564 // use MachConstantBase, it gets modified during matching. So when cloning |
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565 // the node the JVMState must be cloned. Default is not to clone. |
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566 virtual void clone_jvms(Compile* C) { |
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567 if (C->needs_clone_jvms() && jvms() != NULL) { |
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568 set_jvms(jvms()->clone_deep(C)); |
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569 jvms()->set_map_deep(this); |
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570 } |
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571 } |
0 | 572 |
65 | 573 // Returns true if the call may modify n |
10278 | 574 virtual bool may_modify(const TypeOopPtr *t_oop, PhaseTransform *phase); |
65 | 575 // Does this node have a use of n other than in debug information? |
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576 bool has_non_debug_use(Node *n); |
65 | 577 // Returns the unique CheckCastPP of a call |
578 // or result projection is there are several CheckCastPP | |
579 // or returns NULL if there is no one. | |
580 Node *result_cast(); | |
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581 // Does this node returns pointer? |
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582 bool returns_pointer() const { |
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583 const TypeTuple *r = tf()->range(); |
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584 return (r->cnt() > TypeFunc::Parms && |
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585 r->field_at(TypeFunc::Parms)->isa_ptr()); |
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586 } |
65 | 587 |
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588 // Collect all the interesting edges from a call for use in |
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589 // replacing the call by something else. Used by macro expansion |
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590 // and the late inlining support. |
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591 void extract_projections(CallProjections* projs, bool separate_io_proj); |
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592 |
0 | 593 virtual uint match_edge(uint idx) const; |
594 | |
595 #ifndef PRODUCT | |
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596 virtual void dump_req(outputStream *st = tty) const; |
0 | 597 virtual void dump_spec(outputStream *st) const; |
598 #endif | |
599 }; | |
600 | |
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601 |
0 | 602 //------------------------------CallJavaNode----------------------------------- |
603 // Make a static or dynamic subroutine call node using Java calling | |
604 // convention. (The "Java" calling convention is the compiler's calling | |
605 // convention, as opposed to the interpreter's or that of native C.) | |
606 class CallJavaNode : public CallNode { | |
3939 | 607 friend class VMStructs; |
0 | 608 protected: |
609 virtual uint cmp( const Node &n ) const; | |
610 virtual uint size_of() const; // Size is bigger | |
611 | |
612 bool _optimized_virtual; | |
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613 bool _method_handle_invoke; |
0 | 614 ciMethod* _method; // Method being direct called |
615 public: | |
616 const int _bci; // Byte Code Index of call byte code | |
617 CallJavaNode(const TypeFunc* tf , address addr, ciMethod* method, int bci) | |
618 : CallNode(tf, addr, TypePtr::BOTTOM), | |
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619 _method(method), _bci(bci), |
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620 _optimized_virtual(false), |
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621 _method_handle_invoke(false) |
0 | 622 { |
623 init_class_id(Class_CallJava); | |
624 } | |
625 | |
626 virtual int Opcode() const; | |
627 ciMethod* method() const { return _method; } | |
628 void set_method(ciMethod *m) { _method = m; } | |
629 void set_optimized_virtual(bool f) { _optimized_virtual = f; } | |
630 bool is_optimized_virtual() const { return _optimized_virtual; } | |
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631 void set_method_handle_invoke(bool f) { _method_handle_invoke = f; } |
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632 bool is_method_handle_invoke() const { return _method_handle_invoke; } |
0 | 633 |
634 #ifndef PRODUCT | |
635 virtual void dump_spec(outputStream *st) const; | |
636 #endif | |
637 }; | |
638 | |
639 //------------------------------CallStaticJavaNode----------------------------- | |
640 // Make a direct subroutine call using Java calling convention (for static | |
641 // calls and optimized virtual calls, plus calls to wrappers for run-time | |
642 // routines); generates static stub. | |
643 class CallStaticJavaNode : public CallJavaNode { | |
644 virtual uint cmp( const Node &n ) const; | |
645 virtual uint size_of() const; // Size is bigger | |
646 public: | |
10278 | 647 CallStaticJavaNode(Compile* C, const TypeFunc* tf, address addr, ciMethod* method, int bci) |
0 | 648 : CallJavaNode(tf, addr, method, bci), _name(NULL) { |
649 init_class_id(Class_CallStaticJava); | |
10278 | 650 if (C->eliminate_boxing() && (method != NULL) && method->is_boxing_method()) { |
651 init_flags(Flag_is_macro); | |
652 C->add_macro_node(this); | |
653 } | |
654 _is_scalar_replaceable = false; | |
655 _is_non_escaping = false; | |
0 | 656 } |
657 CallStaticJavaNode(const TypeFunc* tf, address addr, const char* name, int bci, | |
658 const TypePtr* adr_type) | |
659 : CallJavaNode(tf, addr, NULL, bci), _name(name) { | |
660 init_class_id(Class_CallStaticJava); | |
661 // This node calls a runtime stub, which often has narrow memory effects. | |
662 _adr_type = adr_type; | |
10278 | 663 _is_scalar_replaceable = false; |
664 _is_non_escaping = false; | |
0 | 665 } |
10278 | 666 const char *_name; // Runtime wrapper name |
667 | |
668 // Result of Escape Analysis | |
669 bool _is_scalar_replaceable; | |
670 bool _is_non_escaping; | |
0 | 671 |
672 // If this is an uncommon trap, return the request code, else zero. | |
673 int uncommon_trap_request() const; | |
674 static int extract_uncommon_trap_request(const Node* call); | |
675 | |
10278 | 676 bool is_boxing_method() const { |
677 return is_macro() && (method() != NULL) && method()->is_boxing_method(); | |
678 } | |
679 // Later inlining modifies the JVMState, so we need to clone it | |
680 // when the call node is cloned (because it is macro node). | |
681 virtual void clone_jvms(Compile* C) { | |
682 if ((jvms() != NULL) && is_boxing_method()) { | |
683 set_jvms(jvms()->clone_deep(C)); | |
684 jvms()->set_map_deep(this); | |
685 } | |
686 } | |
687 | |
0 | 688 virtual int Opcode() const; |
689 #ifndef PRODUCT | |
690 virtual void dump_spec(outputStream *st) const; | |
691 #endif | |
692 }; | |
693 | |
694 //------------------------------CallDynamicJavaNode---------------------------- | |
695 // Make a dispatched call using Java calling convention. | |
696 class CallDynamicJavaNode : public CallJavaNode { | |
697 virtual uint cmp( const Node &n ) const; | |
698 virtual uint size_of() const; // Size is bigger | |
699 public: | |
700 CallDynamicJavaNode( const TypeFunc *tf , address addr, ciMethod* method, int vtable_index, int bci ) : CallJavaNode(tf,addr,method,bci), _vtable_index(vtable_index) { | |
701 init_class_id(Class_CallDynamicJava); | |
702 } | |
703 | |
704 int _vtable_index; | |
705 virtual int Opcode() const; | |
706 #ifndef PRODUCT | |
707 virtual void dump_spec(outputStream *st) const; | |
708 #endif | |
709 }; | |
710 | |
711 //------------------------------CallRuntimeNode-------------------------------- | |
712 // Make a direct subroutine call node into compiled C++ code. | |
713 class CallRuntimeNode : public CallNode { | |
714 virtual uint cmp( const Node &n ) const; | |
715 virtual uint size_of() const; // Size is bigger | |
716 public: | |
717 CallRuntimeNode(const TypeFunc* tf, address addr, const char* name, | |
718 const TypePtr* adr_type) | |
719 : CallNode(tf, addr, adr_type), | |
720 _name(name) | |
721 { | |
722 init_class_id(Class_CallRuntime); | |
723 } | |
724 | |
725 const char *_name; // Printable name, if _method is NULL | |
726 virtual int Opcode() const; | |
727 virtual void calling_convention( BasicType* sig_bt, VMRegPair *parm_regs, uint argcnt ) const; | |
728 | |
729 #ifndef PRODUCT | |
730 virtual void dump_spec(outputStream *st) const; | |
731 #endif | |
732 }; | |
733 | |
734 //------------------------------CallLeafNode----------------------------------- | |
735 // Make a direct subroutine call node into compiled C++ code, without | |
736 // safepoints | |
737 class CallLeafNode : public CallRuntimeNode { | |
738 public: | |
739 CallLeafNode(const TypeFunc* tf, address addr, const char* name, | |
740 const TypePtr* adr_type) | |
741 : CallRuntimeNode(tf, addr, name, adr_type) | |
742 { | |
743 init_class_id(Class_CallLeaf); | |
744 } | |
745 virtual int Opcode() const; | |
746 virtual bool guaranteed_safepoint() { return false; } | |
747 #ifndef PRODUCT | |
748 virtual void dump_spec(outputStream *st) const; | |
749 #endif | |
750 }; | |
751 | |
752 //------------------------------CallLeafNoFPNode------------------------------- | |
753 // CallLeafNode, not using floating point or using it in the same manner as | |
754 // the generated code | |
755 class CallLeafNoFPNode : public CallLeafNode { | |
756 public: | |
757 CallLeafNoFPNode(const TypeFunc* tf, address addr, const char* name, | |
758 const TypePtr* adr_type) | |
759 : CallLeafNode(tf, addr, name, adr_type) | |
760 { | |
761 } | |
762 virtual int Opcode() const; | |
763 }; | |
764 | |
765 | |
766 //------------------------------Allocate--------------------------------------- | |
767 // High-level memory allocation | |
768 // | |
769 // AllocateNode and AllocateArrayNode are subclasses of CallNode because they will | |
770 // get expanded into a code sequence containing a call. Unlike other CallNodes, | |
771 // they have 2 memory projections and 2 i_o projections (which are distinguished by | |
772 // the _is_io_use flag in the projection.) This is needed when expanding the node in | |
773 // order to differentiate the uses of the projection on the normal control path from | |
774 // those on the exception return path. | |
775 // | |
776 class AllocateNode : public CallNode { | |
777 public: | |
778 enum { | |
779 // Output: | |
780 RawAddress = TypeFunc::Parms, // the newly-allocated raw address | |
781 // Inputs: | |
782 AllocSize = TypeFunc::Parms, // size (in bytes) of the new object | |
783 KlassNode, // type (maybe dynamic) of the obj. | |
784 InitialTest, // slow-path test (may be constant) | |
785 ALength, // array length (or TOP if none) | |
786 ParmLimit | |
787 }; | |
788 | |
10278 | 789 static const TypeFunc* alloc_type(const Type* t) { |
0 | 790 const Type** fields = TypeTuple::fields(ParmLimit - TypeFunc::Parms); |
791 fields[AllocSize] = TypeInt::POS; | |
792 fields[KlassNode] = TypeInstPtr::NOTNULL; | |
793 fields[InitialTest] = TypeInt::BOOL; | |
10278 | 794 fields[ALength] = t; // length (can be a bad length) |
0 | 795 |
796 const TypeTuple *domain = TypeTuple::make(ParmLimit, fields); | |
797 | |
798 // create result type (range) | |
799 fields = TypeTuple::fields(1); | |
800 fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Returned oop | |
801 | |
802 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields); | |
803 | |
804 return TypeFunc::make(domain, range); | |
805 } | |
806 | |
10278 | 807 // Result of Escape Analysis |
808 bool _is_scalar_replaceable; | |
809 bool _is_non_escaping; | |
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810 |
0 | 811 virtual uint size_of() const; // Size is bigger |
812 AllocateNode(Compile* C, const TypeFunc *atype, Node *ctrl, Node *mem, Node *abio, | |
813 Node *size, Node *klass_node, Node *initial_test); | |
814 // Expansion modifies the JVMState, so we need to clone it | |
10278 | 815 virtual void clone_jvms(Compile* C) { |
816 if (jvms() != NULL) { | |
817 set_jvms(jvms()->clone_deep(C)); | |
818 jvms()->set_map_deep(this); | |
819 } | |
0 | 820 } |
821 virtual int Opcode() const; | |
822 virtual uint ideal_reg() const { return Op_RegP; } | |
823 virtual bool guaranteed_safepoint() { return false; } | |
824 | |
65 | 825 // allocations do not modify their arguments |
10278 | 826 virtual bool may_modify(const TypeOopPtr *t_oop, PhaseTransform *phase) { return false;} |
65 | 827 |
0 | 828 // Pattern-match a possible usage of AllocateNode. |
829 // Return null if no allocation is recognized. | |
830 // The operand is the pointer produced by the (possible) allocation. | |
831 // It must be a projection of the Allocate or its subsequent CastPP. | |
832 // (Note: This function is defined in file graphKit.cpp, near | |
833 // GraphKit::new_instance/new_array, whose output it recognizes.) | |
834 // The 'ptr' may not have an offset unless the 'offset' argument is given. | |
835 static AllocateNode* Ideal_allocation(Node* ptr, PhaseTransform* phase); | |
836 | |
837 // Fancy version which uses AddPNode::Ideal_base_and_offset to strip | |
838 // an offset, which is reported back to the caller. | |
839 // (Note: AllocateNode::Ideal_allocation is defined in graphKit.cpp.) | |
840 static AllocateNode* Ideal_allocation(Node* ptr, PhaseTransform* phase, | |
841 intptr_t& offset); | |
842 | |
843 // Dig the klass operand out of a (possible) allocation site. | |
844 static Node* Ideal_klass(Node* ptr, PhaseTransform* phase) { | |
845 AllocateNode* allo = Ideal_allocation(ptr, phase); | |
846 return (allo == NULL) ? NULL : allo->in(KlassNode); | |
847 } | |
848 | |
849 // Conservatively small estimate of offset of first non-header byte. | |
850 int minimum_header_size() { | |
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851 return is_AllocateArray() ? arrayOopDesc::base_offset_in_bytes(T_BYTE) : |
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852 instanceOopDesc::base_offset_in_bytes(); |
0 | 853 } |
854 | |
855 // Return the corresponding initialization barrier (or null if none). | |
856 // Walks out edges to find it... | |
857 // (Note: Both InitializeNode::allocation and AllocateNode::initialization | |
858 // are defined in graphKit.cpp, which sets up the bidirectional relation.) | |
859 InitializeNode* initialization(); | |
860 | |
861 // Convenience for initialization->maybe_set_complete(phase) | |
862 bool maybe_set_complete(PhaseGVN* phase); | |
863 }; | |
864 | |
865 //------------------------------AllocateArray--------------------------------- | |
866 // | |
867 // High-level array allocation | |
868 // | |
869 class AllocateArrayNode : public AllocateNode { | |
870 public: | |
871 AllocateArrayNode(Compile* C, const TypeFunc *atype, Node *ctrl, Node *mem, Node *abio, | |
872 Node* size, Node* klass_node, Node* initial_test, | |
873 Node* count_val | |
874 ) | |
875 : AllocateNode(C, atype, ctrl, mem, abio, size, klass_node, | |
876 initial_test) | |
877 { | |
878 init_class_id(Class_AllocateArray); | |
879 set_req(AllocateNode::ALength, count_val); | |
880 } | |
881 virtual int Opcode() const; | |
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882 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); |
0 | 883 |
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884 // Dig the length operand out of a array allocation site. |
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885 Node* Ideal_length() { |
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886 return in(AllocateNode::ALength); |
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887 } |
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888 |
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889 // Dig the length operand out of a array allocation site and narrow the |
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890 // type with a CastII, if necesssary |
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891 Node* make_ideal_length(const TypeOopPtr* ary_type, PhaseTransform *phase, bool can_create = true); |
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892 |
0 | 893 // Pattern-match a possible usage of AllocateArrayNode. |
894 // Return null if no allocation is recognized. | |
895 static AllocateArrayNode* Ideal_array_allocation(Node* ptr, PhaseTransform* phase) { | |
896 AllocateNode* allo = Ideal_allocation(ptr, phase); | |
897 return (allo == NULL || !allo->is_AllocateArray()) | |
898 ? NULL : allo->as_AllocateArray(); | |
899 } | |
900 }; | |
901 | |
902 //------------------------------AbstractLockNode----------------------------------- | |
903 class AbstractLockNode: public CallNode { | |
904 private: | |
4777 | 905 enum { |
906 Regular = 0, // Normal lock | |
907 NonEscObj, // Lock is used for non escaping object | |
908 Coarsened, // Lock was coarsened | |
909 Nested // Nested lock | |
910 } _kind; | |
0 | 911 #ifndef PRODUCT |
912 NamedCounter* _counter; | |
913 #endif | |
914 | |
915 protected: | |
916 // helper functions for lock elimination | |
917 // | |
918 | |
919 bool find_matching_unlock(const Node* ctrl, LockNode* lock, | |
920 GrowableArray<AbstractLockNode*> &lock_ops); | |
921 bool find_lock_and_unlock_through_if(Node* node, LockNode* lock, | |
922 GrowableArray<AbstractLockNode*> &lock_ops); | |
923 bool find_unlocks_for_region(const RegionNode* region, LockNode* lock, | |
924 GrowableArray<AbstractLockNode*> &lock_ops); | |
925 LockNode *find_matching_lock(UnlockNode* unlock); | |
926 | |
4777 | 927 // Update the counter to indicate that this lock was eliminated. |
928 void set_eliminated_lock_counter() PRODUCT_RETURN; | |
0 | 929 |
930 public: | |
931 AbstractLockNode(const TypeFunc *tf) | |
932 : CallNode(tf, NULL, TypeRawPtr::BOTTOM), | |
4777 | 933 _kind(Regular) |
0 | 934 { |
935 #ifndef PRODUCT | |
936 _counter = NULL; | |
937 #endif | |
938 } | |
939 virtual int Opcode() const = 0; | |
940 Node * obj_node() const {return in(TypeFunc::Parms + 0); } | |
941 Node * box_node() const {return in(TypeFunc::Parms + 1); } | |
942 Node * fastlock_node() const {return in(TypeFunc::Parms + 2); } | |
4777 | 943 void set_box_node(Node* box) { set_req(TypeFunc::Parms + 1, box); } |
944 | |
0 | 945 const Type *sub(const Type *t1, const Type *t2) const { return TypeInt::CC;} |
946 | |
947 virtual uint size_of() const { return sizeof(*this); } | |
948 | |
4777 | 949 bool is_eliminated() const { return (_kind != Regular); } |
950 bool is_non_esc_obj() const { return (_kind == NonEscObj); } | |
951 bool is_coarsened() const { return (_kind == Coarsened); } | |
952 bool is_nested() const { return (_kind == Nested); } | |
0 | 953 |
4777 | 954 void set_non_esc_obj() { _kind = NonEscObj; set_eliminated_lock_counter(); } |
955 void set_coarsened() { _kind = Coarsened; set_eliminated_lock_counter(); } | |
956 void set_nested() { _kind = Nested; set_eliminated_lock_counter(); } | |
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957 |
65 | 958 // locking does not modify its arguments |
10278 | 959 virtual bool may_modify(const TypeOopPtr *t_oop, PhaseTransform *phase){ return false;} |
65 | 960 |
0 | 961 #ifndef PRODUCT |
962 void create_lock_counter(JVMState* s); | |
963 NamedCounter* counter() const { return _counter; } | |
964 #endif | |
965 }; | |
966 | |
967 //------------------------------Lock--------------------------------------- | |
968 // High-level lock operation | |
969 // | |
970 // This is a subclass of CallNode because it is a macro node which gets expanded | |
971 // into a code sequence containing a call. This node takes 3 "parameters": | |
972 // 0 - object to lock | |
973 // 1 - a BoxLockNode | |
974 // 2 - a FastLockNode | |
975 // | |
976 class LockNode : public AbstractLockNode { | |
977 public: | |
978 | |
979 static const TypeFunc *lock_type() { | |
980 // create input type (domain) | |
981 const Type **fields = TypeTuple::fields(3); | |
982 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Object to be Locked | |
983 fields[TypeFunc::Parms+1] = TypeRawPtr::BOTTOM; // Address of stack location for lock | |
984 fields[TypeFunc::Parms+2] = TypeInt::BOOL; // FastLock | |
985 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+3,fields); | |
986 | |
987 // create result type (range) | |
988 fields = TypeTuple::fields(0); | |
989 | |
990 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields); | |
991 | |
992 return TypeFunc::make(domain,range); | |
993 } | |
994 | |
995 virtual int Opcode() const; | |
996 virtual uint size_of() const; // Size is bigger | |
997 LockNode(Compile* C, const TypeFunc *tf) : AbstractLockNode( tf ) { | |
998 init_class_id(Class_Lock); | |
999 init_flags(Flag_is_macro); | |
1000 C->add_macro_node(this); | |
1001 } | |
1002 virtual bool guaranteed_safepoint() { return false; } | |
1003 | |
1004 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
1005 // Expansion modifies the JVMState, so we need to clone it | |
10278 | 1006 virtual void clone_jvms(Compile* C) { |
1007 if (jvms() != NULL) { | |
1008 set_jvms(jvms()->clone_deep(C)); | |
1009 jvms()->set_map_deep(this); | |
1010 } | |
0 | 1011 } |
4777 | 1012 |
1013 bool is_nested_lock_region(); // Is this Lock nested? | |
0 | 1014 }; |
1015 | |
1016 //------------------------------Unlock--------------------------------------- | |
1017 // High-level unlock operation | |
1018 class UnlockNode : public AbstractLockNode { | |
1019 public: | |
1020 virtual int Opcode() const; | |
1021 virtual uint size_of() const; // Size is bigger | |
1022 UnlockNode(Compile* C, const TypeFunc *tf) : AbstractLockNode( tf ) { | |
1023 init_class_id(Class_Unlock); | |
1024 init_flags(Flag_is_macro); | |
1025 C->add_macro_node(this); | |
1026 } | |
1027 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
1028 // unlock is never a safepoint | |
1029 virtual bool guaranteed_safepoint() { return false; } | |
1030 }; | |
1972 | 1031 |
1032 #endif // SHARE_VM_OPTO_CALLNODE_HPP |