Mercurial > hg > truffle
annotate src/share/vm/opto/idealKit.hpp @ 9126:bc26f978b0ce
HotSpotResolvedObjectType: implement hasFinalizeSubclass() correctly
don't use the (wrong) cached value, but ask the runtime on each request.
Fixes regression on xml.* benchmarks @ specjvm2008. The problem was:
After the constructor of Object was deoptimized due to an assumption violation,
it was recompiled again after some time. However, on recompilation, the value
of hasFinalizeSubclass for the class was not updated and it was compiled again
with a, now wrong, assumption, which then triggers deoptimization again.
This was repeated until it hit the recompilation limit (defined by
PerMethodRecompilationCutoff), and therefore only executed by the interpreter
from now on, causing the performance regression.
author | Bernhard Urban <bernhard.urban@jku.at> |
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date | Mon, 15 Apr 2013 19:54:58 +0200 |
parents | 30f42e691e70 |
children | de6a9e811145 2113136690bc |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2005, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_OPTO_IDEALKIT_HPP |
26 #define SHARE_VM_OPTO_IDEALKIT_HPP | |
27 | |
28 #include "opto/addnode.hpp" | |
29 #include "opto/cfgnode.hpp" | |
30 #include "opto/connode.hpp" | |
31 #include "opto/divnode.hpp" | |
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32 #include "opto/graphKit.hpp" |
1972 | 33 #include "opto/mulnode.hpp" |
34 #include "opto/phaseX.hpp" | |
35 #include "opto/subnode.hpp" | |
36 #include "opto/type.hpp" | |
37 | |
0 | 38 //----------------------------------------------------------------------------- |
39 //----------------------------IdealKit----------------------------------------- | |
40 // Set of utilities for creating control flow and scalar SSA data flow. | |
41 // Control: | |
42 // if_then(left, relop, right) | |
43 // else_ (optional) | |
44 // end_if | |
45 // loop(iv variable, initial, relop, limit) | |
46 // - sets iv to initial for first trip | |
47 // - exits when relation on limit is true | |
48 // - the values of initial and limit should be loop invariant | |
49 // - no increment, must be explicitly coded | |
50 // - final value of iv is available after end_loop (until dead()) | |
51 // end_loop | |
52 // make_label(number of gotos) | |
53 // goto_(label) | |
54 // bind(label) | |
55 // Data: | |
56 // ConI(integer constant) - create an integer constant | |
57 // set(variable, value) - assignment | |
58 // value(variable) - reference value | |
59 // dead(variable) - variable's value is no longer live | |
60 // increment(variable, value) - increment variable by value | |
61 // simple operations: AddI, SubI, AndI, LShiftI, etc. | |
62 // Example: | |
63 // Node* limit = ?? | |
64 // IdealVariable i(kit), j(kit); | |
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65 // declarations_done(); |
0 | 66 // Node* exit = make_label(1); // 1 goto |
67 // set(j, ConI(0)); | |
68 // loop(i, ConI(0), BoolTest::lt, limit); { | |
69 // if_then(value(i), BoolTest::gt, ConI(5)) { | |
70 // set(j, ConI(1)); | |
71 // goto_(exit); dead(i); | |
72 // } end_if(); | |
73 // increment(i, ConI(1)); | |
74 // } end_loop(); dead(i); | |
75 // bind(exit); | |
76 // | |
77 // See string_indexOf for a more complete example. | |
78 | |
79 class IdealKit; | |
80 | |
81 // Variable definition for IdealKit | |
82 class IdealVariable: public StackObj { | |
83 friend class IdealKit; | |
84 private: | |
85 int _id; | |
86 void set_id(int id) { _id = id; } | |
87 public: | |
88 IdealVariable(IdealKit &k); | |
89 int id() { assert(has_id(),"uninitialized id"); return _id; } | |
90 bool has_id() { return _id >= 0; } | |
91 }; | |
92 | |
93 class IdealKit: public StackObj { | |
94 friend class IdealVariable; | |
95 // The main state (called a cvstate for Control and Variables) | |
96 // contains both the current values of the variables and the | |
97 // current set of predecessor control edges. The variable values | |
98 // are managed via a Node [in(1)..in(_var_ct)], and the predecessor | |
99 // control edges managed via a RegionNode. The in(0) of the Node | |
100 // for variables points to the RegionNode for the control edges. | |
101 protected: | |
102 Compile * const C; | |
103 PhaseGVN &_gvn; | |
104 GrowableArray<Node*>* _pending_cvstates; // stack of cvstates | |
105 Node* _cvstate; // current cvstate (control, memory and variables) | |
106 uint _var_ct; // number of variables | |
107 bool _delay_all_transforms; // flag forcing all transforms to be delayed | |
108 Node* _initial_ctrl; // saves initial control until variables declared | |
109 Node* _initial_memory; // saves initial memory until variables declared | |
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110 Node* _initial_i_o; // saves initial i_o until variables declared |
0 | 111 |
112 PhaseGVN& gvn() const { return _gvn; } | |
113 // Create a new cvstate filled with nulls | |
114 Node* new_cvstate(); // Create a new cvstate | |
115 Node* cvstate() { return _cvstate; } // current cvstate | |
116 Node* copy_cvstate(); // copy current cvstate | |
117 | |
118 void set_memory(Node* mem, uint alias_idx ); | |
119 void do_memory_merge(Node* merging, Node* join); | |
120 void clear(Node* m); // clear a cvstate | |
121 void stop() { clear(_cvstate); } // clear current cvstate | |
122 Node* delay_transform(Node* n); | |
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123 Node* transform(Node* n); // gvn.transform or skip it |
0 | 124 Node* promote_to_phi(Node* n, Node* reg);// Promote "n" to a phi on region "reg" |
125 bool was_promoted_to_phi(Node* n, Node* reg) { | |
126 return (n->is_Phi() && n->in(0) == reg); | |
127 } | |
128 void declare(IdealVariable* v) { v->set_id(_var_ct++); } | |
129 // This declares the position where vars are kept in the cvstate | |
130 // For some degree of consistency we use the TypeFunc enum to | |
131 // soak up spots in the inputs even though we only use early Control | |
132 // and Memory slots. (So far.) | |
133 static const uint first_var; // = TypeFunc::Parms + 1; | |
134 | |
135 #ifdef ASSERT | |
136 enum State { NullS=0, BlockS=1, LoopS=2, IfThenS=4, ElseS=8, EndifS= 16 }; | |
137 GrowableArray<int>* _state; | |
138 State state() { return (State)(_state->top()); } | |
139 #endif | |
140 | |
141 // Users should not care about slices only MergedMem so no access for them. | |
142 Node* memory(uint alias_idx); | |
143 | |
144 public: | |
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145 IdealKit(GraphKit* gkit, bool delay_all_transforms = false, bool has_declarations = false); |
0 | 146 ~IdealKit() { |
147 stop(); | |
148 } | |
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149 void sync_kit(GraphKit* gkit); |
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150 |
0 | 151 // Control |
152 Node* ctrl() { return _cvstate->in(TypeFunc::Control); } | |
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153 void set_ctrl(Node* ctrl) { _cvstate->set_req(TypeFunc::Control, ctrl); } |
0 | 154 Node* top() { return C->top(); } |
155 MergeMemNode* merged_memory() { return _cvstate->in(TypeFunc::Memory)->as_MergeMem(); } | |
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156 void set_all_memory(Node* mem) { _cvstate->set_req(TypeFunc::Memory, mem); } |
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157 Node* i_o() { return _cvstate->in(TypeFunc::I_O); } |
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158 void set_i_o(Node* c) { _cvstate->set_req(TypeFunc::I_O, c); } |
0 | 159 void set(IdealVariable& v, Node* rhs) { _cvstate->set_req(first_var + v.id(), rhs); } |
160 Node* value(IdealVariable& v) { return _cvstate->in(first_var + v.id()); } | |
161 void dead(IdealVariable& v) { set(v, (Node*)NULL); } | |
162 void if_then(Node* left, BoolTest::mask relop, Node* right, | |
163 float prob = PROB_FAIR, float cnt = COUNT_UNKNOWN, | |
164 bool push_new_state = true); | |
165 void else_(); | |
166 void end_if(); | |
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167 void loop(GraphKit* gkit, int nargs, IdealVariable& iv, Node* init, BoolTest::mask cmp, Node* limit, |
0 | 168 float prob = PROB_LIKELY(0.9), float cnt = COUNT_UNKNOWN); |
169 void end_loop(); | |
170 Node* make_label(int goto_ct); | |
171 void bind(Node* lab); | |
172 void goto_(Node* lab, bool bind = false); | |
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173 void declarations_done(); |
0 | 174 |
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175 Node* IfTrue(IfNode* iff) { return transform(new (C) IfTrueNode(iff)); } |
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176 Node* IfFalse(IfNode* iff) { return transform(new (C) IfFalseNode(iff)); } |
0 | 177 |
178 // Data | |
179 Node* ConI(jint k) { return (Node*)gvn().intcon(k); } | |
180 Node* makecon(const Type *t) const { return _gvn.makecon(t); } | |
181 | |
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182 Node* AddI(Node* l, Node* r) { return transform(new (C) AddINode(l, r)); } |
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183 Node* SubI(Node* l, Node* r) { return transform(new (C) SubINode(l, r)); } |
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184 Node* AndI(Node* l, Node* r) { return transform(new (C) AndINode(l, r)); } |
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185 Node* MaxI(Node* l, Node* r) { return transform(new (C) MaxINode(l, r)); } |
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186 Node* LShiftI(Node* l, Node* r) { return transform(new (C) LShiftINode(l, r)); } |
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187 Node* CmpI(Node* l, Node* r) { return transform(new (C) CmpINode(l, r)); } |
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188 Node* Bool(Node* cmp, BoolTest::mask relop) { return transform(new (C) BoolNode(cmp, relop)); } |
0 | 189 void increment(IdealVariable& v, Node* j) { set(v, AddI(value(v), j)); } |
190 void decrement(IdealVariable& v, Node* j) { set(v, SubI(value(v), j)); } | |
191 | |
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192 Node* CmpL(Node* l, Node* r) { return transform(new (C) CmpLNode(l, r)); } |
0 | 193 |
194 // TLS | |
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195 Node* thread() { return gvn().transform(new (C) ThreadLocalNode()); } |
0 | 196 |
197 // Pointers | |
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198 |
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199 // Raw address should be transformed regardless 'delay_transform' flag |
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200 // to produce canonical form CastX2P(offset). |
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201 Node* AddP(Node *base, Node *ptr, Node *off) { return _gvn.transform(new (C) AddPNode(base, ptr, off)); } |
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202 |
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203 Node* CmpP(Node* l, Node* r) { return transform(new (C) CmpPNode(l, r)); } |
0 | 204 #ifdef _LP64 |
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205 Node* XorX(Node* l, Node* r) { return transform(new (C) XorLNode(l, r)); } |
0 | 206 #else // _LP64 |
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207 Node* XorX(Node* l, Node* r) { return transform(new (C) XorINode(l, r)); } |
0 | 208 #endif // _LP64 |
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209 Node* URShiftX(Node* l, Node* r) { return transform(new (C) URShiftXNode(l, r)); } |
0 | 210 Node* ConX(jint k) { return (Node*)gvn().MakeConX(k); } |
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211 Node* CastPX(Node* ctl, Node* p) { return transform(new (C) CastP2XNode(ctl, p)); } |
0 | 212 |
213 // Memory operations | |
214 | |
215 // This is the base version which is given an alias index. | |
216 Node* load(Node* ctl, | |
217 Node* adr, | |
218 const Type* t, | |
219 BasicType bt, | |
220 int adr_idx, | |
221 bool require_atomic_access = false); | |
222 | |
223 // Return the new StoreXNode | |
224 Node* store(Node* ctl, | |
225 Node* adr, | |
226 Node* val, | |
227 BasicType bt, | |
228 int adr_idx, | |
229 bool require_atomic_access = false); | |
230 | |
231 // Store a card mark ordered after store_oop | |
232 Node* storeCM(Node* ctl, | |
233 Node* adr, | |
234 Node* val, | |
235 Node* oop_store, | |
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236 int oop_adr_idx, |
0 | 237 BasicType bt, |
238 int adr_idx); | |
239 | |
240 // Trivial call | |
241 void make_leaf_call(const TypeFunc *slow_call_type, | |
242 address slow_call, | |
243 const char *leaf_name, | |
244 Node* parm0, | |
245 Node* parm1 = NULL, | |
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246 Node* parm2 = NULL, |
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247 Node* parm3 = NULL); |
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248 |
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249 void make_leaf_call_no_fp(const TypeFunc *slow_call_type, |
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250 address slow_call, |
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251 const char *leaf_name, |
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252 const TypePtr* adr_type, |
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253 Node* parm0, |
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254 Node* parm1, |
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255 Node* parm2, |
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256 Node* parm3); |
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257 |
0 | 258 }; |
1972 | 259 |
260 #endif // SHARE_VM_OPTO_IDEALKIT_HPP |