Mercurial > hg > graal-compiler
annotate src/share/vm/opto/idealKit.hpp @ 2412:f9424955eb18
7029152: Ideal nodes for String intrinsics miss memory edge optimization
Summary: In Ideal() method of String intrinsics nodes look for TypeAryPtr::CHARS memory slice if memory is MergeMem. Do not unroll a loop with String intrinsics code.
Reviewed-by: never
author | kvn |
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date | Wed, 30 Mar 2011 12:08:49 -0700 |
parents | 9dc311b8473e |
children | 1d1603768966 07acc51c1d2a |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 2005, 2010, 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 GrowableArray<Node*>* _delay_transform; // delay invoking gvn.transform until drain | |
106 Node* _cvstate; // current cvstate (control, memory and variables) | |
107 uint _var_ct; // number of variables | |
108 bool _delay_all_transforms; // flag forcing all transforms to be delayed | |
109 Node* _initial_ctrl; // saves initial control until variables declared | |
110 Node* _initial_memory; // saves initial memory until variables declared | |
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); | |
123 Node* transform(Node* n); // gvn.transform or push node on delay list | |
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(PhaseGVN &gvn, Node* control, Node* memory, bool delay_all_transforms = false, bool has_declarations = false); |
0 | 146 ~IdealKit() { |
147 stop(); | |
148 drain_delay_transform(); | |
149 } | |
150 // Control | |
151 Node* ctrl() { return _cvstate->in(TypeFunc::Control); } | |
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152 void set_ctrl(Node* ctrl) { _cvstate->set_req(TypeFunc::Control, ctrl); } |
0 | 153 Node* top() { return C->top(); } |
154 MergeMemNode* merged_memory() { return _cvstate->in(TypeFunc::Memory)->as_MergeMem(); } | |
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155 void set_all_memory(Node* mem) { _cvstate->set_req(TypeFunc::Memory, mem); } |
0 | 156 void set(IdealVariable& v, Node* rhs) { _cvstate->set_req(first_var + v.id(), rhs); } |
157 Node* value(IdealVariable& v) { return _cvstate->in(first_var + v.id()); } | |
158 void dead(IdealVariable& v) { set(v, (Node*)NULL); } | |
159 void if_then(Node* left, BoolTest::mask relop, Node* right, | |
160 float prob = PROB_FAIR, float cnt = COUNT_UNKNOWN, | |
161 bool push_new_state = true); | |
162 void else_(); | |
163 void end_if(); | |
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164 void loop(GraphKit* gkit, int nargs, IdealVariable& iv, Node* init, BoolTest::mask cmp, Node* limit, |
0 | 165 float prob = PROB_LIKELY(0.9), float cnt = COUNT_UNKNOWN); |
166 void end_loop(); | |
167 Node* make_label(int goto_ct); | |
168 void bind(Node* lab); | |
169 void goto_(Node* lab, bool bind = false); | |
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170 void declarations_done(); |
0 | 171 void drain_delay_transform(); |
172 | |
173 Node* IfTrue(IfNode* iff) { return transform(new (C,1) IfTrueNode(iff)); } | |
174 Node* IfFalse(IfNode* iff) { return transform(new (C,1) IfFalseNode(iff)); } | |
175 | |
176 // Data | |
177 Node* ConI(jint k) { return (Node*)gvn().intcon(k); } | |
178 Node* makecon(const Type *t) const { return _gvn.makecon(t); } | |
179 | |
180 Node* AddI(Node* l, Node* r) { return transform(new (C,3) AddINode(l, r)); } | |
181 Node* SubI(Node* l, Node* r) { return transform(new (C,3) SubINode(l, r)); } | |
182 Node* AndI(Node* l, Node* r) { return transform(new (C,3) AndINode(l, r)); } | |
183 Node* MaxI(Node* l, Node* r) { return transform(new (C,3) MaxINode(l, r)); } | |
184 Node* LShiftI(Node* l, Node* r) { return transform(new (C,3) LShiftINode(l, r)); } | |
185 Node* CmpI(Node* l, Node* r) { return transform(new (C,3) CmpINode(l, r)); } | |
186 Node* Bool(Node* cmp, BoolTest::mask relop) { return transform(new (C,2) BoolNode(cmp, relop)); } | |
187 void increment(IdealVariable& v, Node* j) { set(v, AddI(value(v), j)); } | |
188 void decrement(IdealVariable& v, Node* j) { set(v, SubI(value(v), j)); } | |
189 | |
190 Node* CmpL(Node* l, Node* r) { return transform(new (C,3) CmpLNode(l, r)); } | |
191 | |
192 // TLS | |
193 Node* thread() { return gvn().transform(new (C, 1) ThreadLocalNode()); } | |
194 | |
195 // Pointers | |
196 Node* AddP(Node *base, Node *ptr, Node *off) { return transform(new (C,4) AddPNode(base, ptr, off)); } | |
197 Node* CmpP(Node* l, Node* r) { return transform(new (C,3) CmpPNode(l, r)); } | |
198 #ifdef _LP64 | |
199 Node* XorX(Node* l, Node* r) { return transform(new (C,3) XorLNode(l, r)); } | |
200 #else // _LP64 | |
201 Node* XorX(Node* l, Node* r) { return transform(new (C,3) XorINode(l, r)); } | |
202 #endif // _LP64 | |
203 Node* URShiftX(Node* l, Node* r) { return transform(new (C,3) URShiftXNode(l, r)); } | |
204 Node* ConX(jint k) { return (Node*)gvn().MakeConX(k); } | |
205 Node* CastPX(Node* ctl, Node* p) { return transform(new (C,2) CastP2XNode(ctl, p)); } | |
206 // Add a fixed offset to a pointer | |
207 Node* basic_plus_adr(Node* base, Node* ptr, intptr_t offset); | |
208 | |
209 // Memory operations | |
210 | |
211 // This is the base version which is given an alias index. | |
212 Node* load(Node* ctl, | |
213 Node* adr, | |
214 const Type* t, | |
215 BasicType bt, | |
216 int adr_idx, | |
217 bool require_atomic_access = false); | |
218 | |
219 // Return the new StoreXNode | |
220 Node* store(Node* ctl, | |
221 Node* adr, | |
222 Node* val, | |
223 BasicType bt, | |
224 int adr_idx, | |
225 bool require_atomic_access = false); | |
226 | |
227 // Store a card mark ordered after store_oop | |
228 Node* storeCM(Node* ctl, | |
229 Node* adr, | |
230 Node* val, | |
231 Node* oop_store, | |
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232 int oop_adr_idx, |
0 | 233 BasicType bt, |
234 int adr_idx); | |
235 | |
236 // Trivial call | |
237 void make_leaf_call(const TypeFunc *slow_call_type, | |
238 address slow_call, | |
239 const char *leaf_name, | |
240 Node* parm0, | |
241 Node* parm1 = NULL, | |
242 Node* parm2 = NULL); | |
243 }; | |
1972 | 244 |
245 #endif // SHARE_VM_OPTO_IDEALKIT_HPP |