Mercurial > hg > truffle
annotate src/share/vm/opto/type.cpp @ 14513:16c705d792be
Merge
author | morris |
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date | Fri, 28 Feb 2014 08:02:20 -0800 |
parents | 484a359ff649 |
children | 4ca6dc0799b6 |
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 #include "precompiled.hpp" |
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26 #include "ci/ciMethodData.hpp" |
1972 | 27 #include "ci/ciTypeFlow.hpp" |
28 #include "classfile/symbolTable.hpp" | |
29 #include "classfile/systemDictionary.hpp" | |
30 #include "compiler/compileLog.hpp" | |
31 #include "libadt/dict.hpp" | |
32 #include "memory/gcLocker.hpp" | |
33 #include "memory/oopFactory.hpp" | |
34 #include "memory/resourceArea.hpp" | |
35 #include "oops/instanceKlass.hpp" | |
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36 #include "oops/instanceMirrorKlass.hpp" |
1972 | 37 #include "oops/objArrayKlass.hpp" |
38 #include "oops/typeArrayKlass.hpp" | |
39 #include "opto/matcher.hpp" | |
40 #include "opto/node.hpp" | |
41 #include "opto/opcodes.hpp" | |
42 #include "opto/type.hpp" | |
43 | |
0 | 44 // Portions of code courtesy of Clifford Click |
45 | |
46 // Optimization - Graph Style | |
47 | |
48 // Dictionary of types shared among compilations. | |
49 Dict* Type::_shared_type_dict = NULL; | |
50 | |
51 // Array which maps compiler types to Basic Types | |
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52 Type::TypeInfo Type::_type_info[Type::lastype] = { |
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53 { Bad, T_ILLEGAL, "bad", false, Node::NotAMachineReg, relocInfo::none }, // Bad |
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54 { Control, T_ILLEGAL, "control", false, 0, relocInfo::none }, // Control |
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55 { Bottom, T_VOID, "top", false, 0, relocInfo::none }, // Top |
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56 { Bad, T_INT, "int:", false, Op_RegI, relocInfo::none }, // Int |
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57 { Bad, T_LONG, "long:", false, Op_RegL, relocInfo::none }, // Long |
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58 { Half, T_VOID, "half", false, 0, relocInfo::none }, // Half |
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59 { Bad, T_NARROWOOP, "narrowoop:", false, Op_RegN, relocInfo::none }, // NarrowOop |
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60 { Bad, T_NARROWKLASS,"narrowklass:", false, Op_RegN, relocInfo::none }, // NarrowKlass |
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61 { Bad, T_ILLEGAL, "tuple:", false, Node::NotAMachineReg, relocInfo::none }, // Tuple |
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62 { Bad, T_ARRAY, "array:", false, Node::NotAMachineReg, relocInfo::none }, // Array |
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63 |
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64 #ifdef SPARC |
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65 { Bad, T_ILLEGAL, "vectors:", false, 0, relocInfo::none }, // VectorS |
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66 { Bad, T_ILLEGAL, "vectord:", false, Op_RegD, relocInfo::none }, // VectorD |
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67 { Bad, T_ILLEGAL, "vectorx:", false, 0, relocInfo::none }, // VectorX |
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68 { Bad, T_ILLEGAL, "vectory:", false, 0, relocInfo::none }, // VectorY |
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69 #elif defined(PPC64) |
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70 { Bad, T_ILLEGAL, "vectors:", false, 0, relocInfo::none }, // VectorS |
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71 { Bad, T_ILLEGAL, "vectord:", false, Op_RegL, relocInfo::none }, // VectorD |
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72 { Bad, T_ILLEGAL, "vectorx:", false, 0, relocInfo::none }, // VectorX |
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73 { Bad, T_ILLEGAL, "vectory:", false, 0, relocInfo::none }, // VectorY |
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74 #else // all other |
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75 { Bad, T_ILLEGAL, "vectors:", false, Op_VecS, relocInfo::none }, // VectorS |
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76 { Bad, T_ILLEGAL, "vectord:", false, Op_VecD, relocInfo::none }, // VectorD |
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77 { Bad, T_ILLEGAL, "vectorx:", false, Op_VecX, relocInfo::none }, // VectorX |
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78 { Bad, T_ILLEGAL, "vectory:", false, Op_VecY, relocInfo::none }, // VectorY |
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79 #endif |
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80 { Bad, T_ADDRESS, "anyptr:", false, Op_RegP, relocInfo::none }, // AnyPtr |
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81 { Bad, T_ADDRESS, "rawptr:", false, Op_RegP, relocInfo::none }, // RawPtr |
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82 { Bad, T_OBJECT, "oop:", true, Op_RegP, relocInfo::oop_type }, // OopPtr |
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83 { Bad, T_OBJECT, "inst:", true, Op_RegP, relocInfo::oop_type }, // InstPtr |
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84 { Bad, T_OBJECT, "ary:", true, Op_RegP, relocInfo::oop_type }, // AryPtr |
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85 { Bad, T_METADATA, "metadata:", false, Op_RegP, relocInfo::metadata_type }, // MetadataPtr |
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86 { Bad, T_METADATA, "klass:", false, Op_RegP, relocInfo::metadata_type }, // KlassPtr |
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87 { Bad, T_OBJECT, "func", false, 0, relocInfo::none }, // Function |
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88 { Abio, T_ILLEGAL, "abIO", false, 0, relocInfo::none }, // Abio |
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89 { Return_Address, T_ADDRESS, "return_address",false, Op_RegP, relocInfo::none }, // Return_Address |
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90 { Memory, T_ILLEGAL, "memory", false, 0, relocInfo::none }, // Memory |
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91 { FloatBot, T_FLOAT, "float_top", false, Op_RegF, relocInfo::none }, // FloatTop |
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92 { FloatCon, T_FLOAT, "ftcon:", false, Op_RegF, relocInfo::none }, // FloatCon |
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93 { FloatTop, T_FLOAT, "float", false, Op_RegF, relocInfo::none }, // FloatBot |
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94 { DoubleBot, T_DOUBLE, "double_top", false, Op_RegD, relocInfo::none }, // DoubleTop |
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95 { DoubleCon, T_DOUBLE, "dblcon:", false, Op_RegD, relocInfo::none }, // DoubleCon |
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96 { DoubleTop, T_DOUBLE, "double", false, Op_RegD, relocInfo::none }, // DoubleBot |
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97 { Top, T_ILLEGAL, "bottom", false, 0, relocInfo::none } // Bottom |
0 | 98 }; |
99 | |
100 // Map ideal registers (machine types) to ideal types | |
101 const Type *Type::mreg2type[_last_machine_leaf]; | |
102 | |
103 // Map basic types to canonical Type* pointers. | |
104 const Type* Type:: _const_basic_type[T_CONFLICT+1]; | |
105 | |
106 // Map basic types to constant-zero Types. | |
107 const Type* Type:: _zero_type[T_CONFLICT+1]; | |
108 | |
109 // Map basic types to array-body alias types. | |
110 const TypeAryPtr* TypeAryPtr::_array_body_type[T_CONFLICT+1]; | |
111 | |
112 //============================================================================= | |
113 // Convenience common pre-built types. | |
114 const Type *Type::ABIO; // State-of-machine only | |
115 const Type *Type::BOTTOM; // All values | |
116 const Type *Type::CONTROL; // Control only | |
117 const Type *Type::DOUBLE; // All doubles | |
118 const Type *Type::FLOAT; // All floats | |
119 const Type *Type::HALF; // Placeholder half of doublewide type | |
120 const Type *Type::MEMORY; // Abstract store only | |
121 const Type *Type::RETURN_ADDRESS; | |
122 const Type *Type::TOP; // No values in set | |
123 | |
124 //------------------------------get_const_type--------------------------- | |
125 const Type* Type::get_const_type(ciType* type) { | |
126 if (type == NULL) { | |
127 return NULL; | |
128 } else if (type->is_primitive_type()) { | |
129 return get_const_basic_type(type->basic_type()); | |
130 } else { | |
131 return TypeOopPtr::make_from_klass(type->as_klass()); | |
132 } | |
133 } | |
134 | |
135 //---------------------------array_element_basic_type--------------------------------- | |
136 // Mapping to the array element's basic type. | |
137 BasicType Type::array_element_basic_type() const { | |
138 BasicType bt = basic_type(); | |
139 if (bt == T_INT) { | |
140 if (this == TypeInt::INT) return T_INT; | |
141 if (this == TypeInt::CHAR) return T_CHAR; | |
142 if (this == TypeInt::BYTE) return T_BYTE; | |
143 if (this == TypeInt::BOOL) return T_BOOLEAN; | |
144 if (this == TypeInt::SHORT) return T_SHORT; | |
145 return T_VOID; | |
146 } | |
147 return bt; | |
148 } | |
149 | |
150 //---------------------------get_typeflow_type--------------------------------- | |
151 // Import a type produced by ciTypeFlow. | |
152 const Type* Type::get_typeflow_type(ciType* type) { | |
153 switch (type->basic_type()) { | |
154 | |
155 case ciTypeFlow::StateVector::T_BOTTOM: | |
156 assert(type == ciTypeFlow::StateVector::bottom_type(), ""); | |
157 return Type::BOTTOM; | |
158 | |
159 case ciTypeFlow::StateVector::T_TOP: | |
160 assert(type == ciTypeFlow::StateVector::top_type(), ""); | |
161 return Type::TOP; | |
162 | |
163 case ciTypeFlow::StateVector::T_NULL: | |
164 assert(type == ciTypeFlow::StateVector::null_type(), ""); | |
165 return TypePtr::NULL_PTR; | |
166 | |
167 case ciTypeFlow::StateVector::T_LONG2: | |
168 // The ciTypeFlow pass pushes a long, then the half. | |
169 // We do the same. | |
170 assert(type == ciTypeFlow::StateVector::long2_type(), ""); | |
171 return TypeInt::TOP; | |
172 | |
173 case ciTypeFlow::StateVector::T_DOUBLE2: | |
174 // The ciTypeFlow pass pushes double, then the half. | |
175 // Our convention is the same. | |
176 assert(type == ciTypeFlow::StateVector::double2_type(), ""); | |
177 return Type::TOP; | |
178 | |
179 case T_ADDRESS: | |
180 assert(type->is_return_address(), ""); | |
181 return TypeRawPtr::make((address)(intptr_t)type->as_return_address()->bci()); | |
182 | |
183 default: | |
184 // make sure we did not mix up the cases: | |
185 assert(type != ciTypeFlow::StateVector::bottom_type(), ""); | |
186 assert(type != ciTypeFlow::StateVector::top_type(), ""); | |
187 assert(type != ciTypeFlow::StateVector::null_type(), ""); | |
188 assert(type != ciTypeFlow::StateVector::long2_type(), ""); | |
189 assert(type != ciTypeFlow::StateVector::double2_type(), ""); | |
190 assert(!type->is_return_address(), ""); | |
191 | |
192 return Type::get_const_type(type); | |
193 } | |
194 } | |
195 | |
196 | |
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197 //-----------------------make_from_constant------------------------------------ |
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198 const Type* Type::make_from_constant(ciConstant constant, |
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199 bool require_constant, bool is_autobox_cache) { |
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200 switch (constant.basic_type()) { |
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201 case T_BOOLEAN: return TypeInt::make(constant.as_boolean()); |
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202 case T_CHAR: return TypeInt::make(constant.as_char()); |
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203 case T_BYTE: return TypeInt::make(constant.as_byte()); |
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204 case T_SHORT: return TypeInt::make(constant.as_short()); |
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205 case T_INT: return TypeInt::make(constant.as_int()); |
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206 case T_LONG: return TypeLong::make(constant.as_long()); |
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207 case T_FLOAT: return TypeF::make(constant.as_float()); |
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208 case T_DOUBLE: return TypeD::make(constant.as_double()); |
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209 case T_ARRAY: |
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210 case T_OBJECT: |
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211 { |
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212 // cases: |
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213 // can_be_constant = (oop not scavengable || ScavengeRootsInCode != 0) |
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214 // should_be_constant = (oop not scavengable || ScavengeRootsInCode >= 2) |
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215 // An oop is not scavengable if it is in the perm gen. |
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216 ciObject* oop_constant = constant.as_object(); |
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217 if (oop_constant->is_null_object()) { |
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218 return Type::get_zero_type(T_OBJECT); |
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219 } else if (require_constant || oop_constant->should_be_constant()) { |
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220 return TypeOopPtr::make_from_constant(oop_constant, require_constant, is_autobox_cache); |
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221 } |
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222 } |
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223 } |
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224 // Fall through to failure |
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225 return NULL; |
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226 } |
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227 |
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228 |
0 | 229 //------------------------------make------------------------------------------- |
230 // Create a simple Type, with default empty symbol sets. Then hashcons it | |
231 // and look for an existing copy in the type dictionary. | |
232 const Type *Type::make( enum TYPES t ) { | |
233 return (new Type(t))->hashcons(); | |
234 } | |
223 | 235 |
0 | 236 //------------------------------cmp-------------------------------------------- |
237 int Type::cmp( const Type *const t1, const Type *const t2 ) { | |
238 if( t1->_base != t2->_base ) | |
239 return 1; // Missed badly | |
240 assert(t1 != t2 || t1->eq(t2), "eq must be reflexive"); | |
241 return !t1->eq(t2); // Return ZERO if equal | |
242 } | |
243 | |
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244 const Type* Type::maybe_remove_speculative(bool include_speculative) const { |
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245 if (!include_speculative) { |
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246 return remove_speculative(); |
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247 } |
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248 return this; |
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249 } |
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250 |
0 | 251 //------------------------------hash------------------------------------------- |
252 int Type::uhash( const Type *const t ) { | |
253 return t->hash(); | |
254 } | |
255 | |
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256 #define SMALLINT ((juint)3) // a value too insignificant to consider widening |
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257 |
0 | 258 //--------------------------Initialize_shared---------------------------------- |
259 void Type::Initialize_shared(Compile* current) { | |
260 // This method does not need to be locked because the first system | |
261 // compilations (stub compilations) occur serially. If they are | |
262 // changed to proceed in parallel, then this section will need | |
263 // locking. | |
264 | |
265 Arena* save = current->type_arena(); | |
6197 | 266 Arena* shared_type_arena = new (mtCompiler)Arena(); |
0 | 267 |
268 current->set_type_arena(shared_type_arena); | |
269 _shared_type_dict = | |
270 new (shared_type_arena) Dict( (CmpKey)Type::cmp, (Hash)Type::uhash, | |
271 shared_type_arena, 128 ); | |
272 current->set_type_dict(_shared_type_dict); | |
273 | |
274 // Make shared pre-built types. | |
275 CONTROL = make(Control); // Control only | |
276 TOP = make(Top); // No values in set | |
277 MEMORY = make(Memory); // Abstract store only | |
278 ABIO = make(Abio); // State-of-machine only | |
279 RETURN_ADDRESS=make(Return_Address); | |
280 FLOAT = make(FloatBot); // All floats | |
281 DOUBLE = make(DoubleBot); // All doubles | |
282 BOTTOM = make(Bottom); // Everything | |
283 HALF = make(Half); // Placeholder half of doublewide type | |
284 | |
285 TypeF::ZERO = TypeF::make(0.0); // Float 0 (positive zero) | |
286 TypeF::ONE = TypeF::make(1.0); // Float 1 | |
287 | |
288 TypeD::ZERO = TypeD::make(0.0); // Double 0 (positive zero) | |
289 TypeD::ONE = TypeD::make(1.0); // Double 1 | |
290 | |
291 TypeInt::MINUS_1 = TypeInt::make(-1); // -1 | |
292 TypeInt::ZERO = TypeInt::make( 0); // 0 | |
293 TypeInt::ONE = TypeInt::make( 1); // 1 | |
294 TypeInt::BOOL = TypeInt::make(0,1, WidenMin); // 0 or 1, FALSE or TRUE. | |
295 TypeInt::CC = TypeInt::make(-1, 1, WidenMin); // -1, 0 or 1, condition codes | |
296 TypeInt::CC_LT = TypeInt::make(-1,-1, WidenMin); // == TypeInt::MINUS_1 | |
297 TypeInt::CC_GT = TypeInt::make( 1, 1, WidenMin); // == TypeInt::ONE | |
298 TypeInt::CC_EQ = TypeInt::make( 0, 0, WidenMin); // == TypeInt::ZERO | |
299 TypeInt::CC_LE = TypeInt::make(-1, 0, WidenMin); | |
300 TypeInt::CC_GE = TypeInt::make( 0, 1, WidenMin); // == TypeInt::BOOL | |
301 TypeInt::BYTE = TypeInt::make(-128,127, WidenMin); // Bytes | |
624 | 302 TypeInt::UBYTE = TypeInt::make(0, 255, WidenMin); // Unsigned Bytes |
0 | 303 TypeInt::CHAR = TypeInt::make(0,65535, WidenMin); // Java chars |
304 TypeInt::SHORT = TypeInt::make(-32768,32767, WidenMin); // Java shorts | |
305 TypeInt::POS = TypeInt::make(0,max_jint, WidenMin); // Non-neg values | |
306 TypeInt::POS1 = TypeInt::make(1,max_jint, WidenMin); // Positive values | |
307 TypeInt::INT = TypeInt::make(min_jint,max_jint, WidenMax); // 32-bit integers | |
308 TypeInt::SYMINT = TypeInt::make(-max_jint,max_jint,WidenMin); // symmetric range | |
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309 TypeInt::TYPE_DOMAIN = TypeInt::INT; |
0 | 310 // CmpL is overloaded both as the bytecode computation returning |
311 // a trinary (-1,0,+1) integer result AND as an efficient long | |
312 // compare returning optimizer ideal-type flags. | |
313 assert( TypeInt::CC_LT == TypeInt::MINUS_1, "types must match for CmpL to work" ); | |
314 assert( TypeInt::CC_GT == TypeInt::ONE, "types must match for CmpL to work" ); | |
315 assert( TypeInt::CC_EQ == TypeInt::ZERO, "types must match for CmpL to work" ); | |
316 assert( TypeInt::CC_GE == TypeInt::BOOL, "types must match for CmpL to work" ); | |
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317 assert( (juint)(TypeInt::CC->_hi - TypeInt::CC->_lo) <= SMALLINT, "CC is truly small"); |
0 | 318 |
319 TypeLong::MINUS_1 = TypeLong::make(-1); // -1 | |
320 TypeLong::ZERO = TypeLong::make( 0); // 0 | |
321 TypeLong::ONE = TypeLong::make( 1); // 1 | |
322 TypeLong::POS = TypeLong::make(0,max_jlong, WidenMin); // Non-neg values | |
323 TypeLong::LONG = TypeLong::make(min_jlong,max_jlong,WidenMax); // 64-bit integers | |
324 TypeLong::INT = TypeLong::make((jlong)min_jint,(jlong)max_jint,WidenMin); | |
325 TypeLong::UINT = TypeLong::make(0,(jlong)max_juint,WidenMin); | |
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326 TypeLong::TYPE_DOMAIN = TypeLong::LONG; |
0 | 327 |
328 const Type **fboth =(const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*)); | |
329 fboth[0] = Type::CONTROL; | |
330 fboth[1] = Type::CONTROL; | |
331 TypeTuple::IFBOTH = TypeTuple::make( 2, fboth ); | |
332 | |
333 const Type **ffalse =(const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*)); | |
334 ffalse[0] = Type::CONTROL; | |
335 ffalse[1] = Type::TOP; | |
336 TypeTuple::IFFALSE = TypeTuple::make( 2, ffalse ); | |
337 | |
338 const Type **fneither =(const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*)); | |
339 fneither[0] = Type::TOP; | |
340 fneither[1] = Type::TOP; | |
341 TypeTuple::IFNEITHER = TypeTuple::make( 2, fneither ); | |
342 | |
343 const Type **ftrue =(const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*)); | |
344 ftrue[0] = Type::TOP; | |
345 ftrue[1] = Type::CONTROL; | |
346 TypeTuple::IFTRUE = TypeTuple::make( 2, ftrue ); | |
347 | |
348 const Type **floop =(const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*)); | |
349 floop[0] = Type::CONTROL; | |
350 floop[1] = TypeInt::INT; | |
351 TypeTuple::LOOPBODY = TypeTuple::make( 2, floop ); | |
352 | |
353 TypePtr::NULL_PTR= TypePtr::make( AnyPtr, TypePtr::Null, 0 ); | |
354 TypePtr::NOTNULL = TypePtr::make( AnyPtr, TypePtr::NotNull, OffsetBot ); | |
355 TypePtr::BOTTOM = TypePtr::make( AnyPtr, TypePtr::BotPTR, OffsetBot ); | |
356 | |
357 TypeRawPtr::BOTTOM = TypeRawPtr::make( TypePtr::BotPTR ); | |
358 TypeRawPtr::NOTNULL= TypeRawPtr::make( TypePtr::NotNull ); | |
359 | |
360 const Type **fmembar = TypeTuple::fields(0); | |
361 TypeTuple::MEMBAR = TypeTuple::make(TypeFunc::Parms+0, fmembar); | |
362 | |
363 const Type **fsc = (const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*)); | |
364 fsc[0] = TypeInt::CC; | |
365 fsc[1] = Type::MEMORY; | |
366 TypeTuple::STORECONDITIONAL = TypeTuple::make(2, fsc); | |
367 | |
368 TypeInstPtr::NOTNULL = TypeInstPtr::make(TypePtr::NotNull, current->env()->Object_klass()); | |
369 TypeInstPtr::BOTTOM = TypeInstPtr::make(TypePtr::BotPTR, current->env()->Object_klass()); | |
370 TypeInstPtr::MIRROR = TypeInstPtr::make(TypePtr::NotNull, current->env()->Class_klass()); | |
371 TypeInstPtr::MARK = TypeInstPtr::make(TypePtr::BotPTR, current->env()->Object_klass(), | |
372 false, 0, oopDesc::mark_offset_in_bytes()); | |
373 TypeInstPtr::KLASS = TypeInstPtr::make(TypePtr::BotPTR, current->env()->Object_klass(), | |
374 false, 0, oopDesc::klass_offset_in_bytes()); | |
12966 | 375 TypeOopPtr::BOTTOM = TypeOopPtr::make(TypePtr::BotPTR, OffsetBot, TypeOopPtr::InstanceBot, NULL); |
0 | 376 |
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377 TypeMetadataPtr::BOTTOM = TypeMetadataPtr::make(TypePtr::BotPTR, NULL, OffsetBot); |
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378 |
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379 TypeNarrowOop::NULL_PTR = TypeNarrowOop::make( TypePtr::NULL_PTR ); |
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380 TypeNarrowOop::BOTTOM = TypeNarrowOop::make( TypeInstPtr::BOTTOM ); |
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381 |
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382 TypeNarrowKlass::NULL_PTR = TypeNarrowKlass::make( TypePtr::NULL_PTR ); |
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383 |
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384 mreg2type[Op_Node] = Type::BOTTOM; |
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385 mreg2type[Op_Set ] = 0; |
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386 mreg2type[Op_RegN] = TypeNarrowOop::BOTTOM; |
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387 mreg2type[Op_RegI] = TypeInt::INT; |
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388 mreg2type[Op_RegP] = TypePtr::BOTTOM; |
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389 mreg2type[Op_RegF] = Type::FLOAT; |
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390 mreg2type[Op_RegD] = Type::DOUBLE; |
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391 mreg2type[Op_RegL] = TypeLong::LONG; |
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392 mreg2type[Op_RegFlags] = TypeInt::CC; |
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393 |
1761 | 394 TypeAryPtr::RANGE = TypeAryPtr::make( TypePtr::BotPTR, TypeAry::make(Type::BOTTOM,TypeInt::POS), NULL /* current->env()->Object_klass() */, false, arrayOopDesc::length_offset_in_bytes()); |
163 | 395 |
396 TypeAryPtr::NARROWOOPS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeNarrowOop::BOTTOM, TypeInt::POS), NULL /*ciArrayKlass::make(o)*/, false, Type::OffsetBot); | |
397 | |
398 #ifdef _LP64 | |
399 if (UseCompressedOops) { | |
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400 assert(TypeAryPtr::NARROWOOPS->is_ptr_to_narrowoop(), "array of narrow oops must be ptr to narrow oop"); |
163 | 401 TypeAryPtr::OOPS = TypeAryPtr::NARROWOOPS; |
402 } else | |
403 #endif | |
404 { | |
405 // There is no shared klass for Object[]. See note in TypeAryPtr::klass(). | |
406 TypeAryPtr::OOPS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInstPtr::BOTTOM,TypeInt::POS), NULL /*ciArrayKlass::make(o)*/, false, Type::OffsetBot); | |
407 } | |
0 | 408 TypeAryPtr::BYTES = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::BYTE ,TypeInt::POS), ciTypeArrayKlass::make(T_BYTE), true, Type::OffsetBot); |
409 TypeAryPtr::SHORTS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::SHORT ,TypeInt::POS), ciTypeArrayKlass::make(T_SHORT), true, Type::OffsetBot); | |
410 TypeAryPtr::CHARS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::CHAR ,TypeInt::POS), ciTypeArrayKlass::make(T_CHAR), true, Type::OffsetBot); | |
411 TypeAryPtr::INTS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::INT ,TypeInt::POS), ciTypeArrayKlass::make(T_INT), true, Type::OffsetBot); | |
412 TypeAryPtr::LONGS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeLong::LONG ,TypeInt::POS), ciTypeArrayKlass::make(T_LONG), true, Type::OffsetBot); | |
413 TypeAryPtr::FLOATS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(Type::FLOAT ,TypeInt::POS), ciTypeArrayKlass::make(T_FLOAT), true, Type::OffsetBot); | |
414 TypeAryPtr::DOUBLES = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(Type::DOUBLE ,TypeInt::POS), ciTypeArrayKlass::make(T_DOUBLE), true, Type::OffsetBot); | |
415 | |
163 | 416 // Nobody should ask _array_body_type[T_NARROWOOP]. Use NULL as assert. |
417 TypeAryPtr::_array_body_type[T_NARROWOOP] = NULL; | |
0 | 418 TypeAryPtr::_array_body_type[T_OBJECT] = TypeAryPtr::OOPS; |
163 | 419 TypeAryPtr::_array_body_type[T_ARRAY] = TypeAryPtr::OOPS; // arrays are stored in oop arrays |
0 | 420 TypeAryPtr::_array_body_type[T_BYTE] = TypeAryPtr::BYTES; |
421 TypeAryPtr::_array_body_type[T_BOOLEAN] = TypeAryPtr::BYTES; // boolean[] is a byte array | |
422 TypeAryPtr::_array_body_type[T_SHORT] = TypeAryPtr::SHORTS; | |
423 TypeAryPtr::_array_body_type[T_CHAR] = TypeAryPtr::CHARS; | |
424 TypeAryPtr::_array_body_type[T_INT] = TypeAryPtr::INTS; | |
425 TypeAryPtr::_array_body_type[T_LONG] = TypeAryPtr::LONGS; | |
426 TypeAryPtr::_array_body_type[T_FLOAT] = TypeAryPtr::FLOATS; | |
427 TypeAryPtr::_array_body_type[T_DOUBLE] = TypeAryPtr::DOUBLES; | |
428 | |
429 TypeKlassPtr::OBJECT = TypeKlassPtr::make( TypePtr::NotNull, current->env()->Object_klass(), 0 ); | |
430 TypeKlassPtr::OBJECT_OR_NULL = TypeKlassPtr::make( TypePtr::BotPTR, current->env()->Object_klass(), 0 ); | |
431 | |
432 const Type **fi2c = TypeTuple::fields(2); | |
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433 fi2c[TypeFunc::Parms+0] = TypeInstPtr::BOTTOM; // Method* |
0 | 434 fi2c[TypeFunc::Parms+1] = TypeRawPtr::BOTTOM; // argument pointer |
435 TypeTuple::START_I2C = TypeTuple::make(TypeFunc::Parms+2, fi2c); | |
436 | |
437 const Type **intpair = TypeTuple::fields(2); | |
438 intpair[0] = TypeInt::INT; | |
439 intpair[1] = TypeInt::INT; | |
440 TypeTuple::INT_PAIR = TypeTuple::make(2, intpair); | |
441 | |
442 const Type **longpair = TypeTuple::fields(2); | |
443 longpair[0] = TypeLong::LONG; | |
444 longpair[1] = TypeLong::LONG; | |
445 TypeTuple::LONG_PAIR = TypeTuple::make(2, longpair); | |
446 | |
12323 | 447 const Type **intccpair = TypeTuple::fields(2); |
448 intccpair[0] = TypeInt::INT; | |
449 intccpair[1] = TypeInt::CC; | |
450 TypeTuple::INT_CC_PAIR = TypeTuple::make(2, intccpair); | |
451 | |
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452 const Type **longccpair = TypeTuple::fields(2); |
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453 longccpair[0] = TypeLong::LONG; |
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454 longccpair[1] = TypeInt::CC; |
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455 TypeTuple::LONG_CC_PAIR = TypeTuple::make(2, longccpair); |
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456 |
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457 _const_basic_type[T_NARROWOOP] = TypeNarrowOop::BOTTOM; |
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458 _const_basic_type[T_NARROWKLASS] = Type::BOTTOM; |
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459 _const_basic_type[T_BOOLEAN] = TypeInt::BOOL; |
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460 _const_basic_type[T_CHAR] = TypeInt::CHAR; |
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461 _const_basic_type[T_BYTE] = TypeInt::BYTE; |
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462 _const_basic_type[T_SHORT] = TypeInt::SHORT; |
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463 _const_basic_type[T_INT] = TypeInt::INT; |
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464 _const_basic_type[T_LONG] = TypeLong::LONG; |
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465 _const_basic_type[T_FLOAT] = Type::FLOAT; |
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466 _const_basic_type[T_DOUBLE] = Type::DOUBLE; |
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467 _const_basic_type[T_OBJECT] = TypeInstPtr::BOTTOM; |
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468 _const_basic_type[T_ARRAY] = TypeInstPtr::BOTTOM; // there is no separate bottom for arrays |
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469 _const_basic_type[T_VOID] = TypePtr::NULL_PTR; // reflection represents void this way |
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470 _const_basic_type[T_ADDRESS] = TypeRawPtr::BOTTOM; // both interpreter return addresses & random raw ptrs |
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471 _const_basic_type[T_CONFLICT] = Type::BOTTOM; // why not? |
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472 |
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473 _zero_type[T_NARROWOOP] = TypeNarrowOop::NULL_PTR; |
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474 _zero_type[T_NARROWKLASS] = TypeNarrowKlass::NULL_PTR; |
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475 _zero_type[T_BOOLEAN] = TypeInt::ZERO; // false == 0 |
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476 _zero_type[T_CHAR] = TypeInt::ZERO; // '\0' == 0 |
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477 _zero_type[T_BYTE] = TypeInt::ZERO; // 0x00 == 0 |
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478 _zero_type[T_SHORT] = TypeInt::ZERO; // 0x0000 == 0 |
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479 _zero_type[T_INT] = TypeInt::ZERO; |
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480 _zero_type[T_LONG] = TypeLong::ZERO; |
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481 _zero_type[T_FLOAT] = TypeF::ZERO; |
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482 _zero_type[T_DOUBLE] = TypeD::ZERO; |
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483 _zero_type[T_OBJECT] = TypePtr::NULL_PTR; |
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484 _zero_type[T_ARRAY] = TypePtr::NULL_PTR; // null array is null oop |
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485 _zero_type[T_ADDRESS] = TypePtr::NULL_PTR; // raw pointers use the same null |
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486 _zero_type[T_VOID] = Type::TOP; // the only void value is no value at all |
0 | 487 |
488 // get_zero_type() should not happen for T_CONFLICT | |
489 _zero_type[T_CONFLICT]= NULL; | |
490 | |
6179
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491 // Vector predefined types, it needs initialized _const_basic_type[]. |
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492 if (Matcher::vector_size_supported(T_BYTE,4)) { |
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493 TypeVect::VECTS = TypeVect::make(T_BYTE,4); |
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494 } |
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495 if (Matcher::vector_size_supported(T_FLOAT,2)) { |
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496 TypeVect::VECTD = TypeVect::make(T_FLOAT,2); |
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497 } |
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498 if (Matcher::vector_size_supported(T_FLOAT,4)) { |
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499 TypeVect::VECTX = TypeVect::make(T_FLOAT,4); |
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500 } |
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501 if (Matcher::vector_size_supported(T_FLOAT,8)) { |
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502 TypeVect::VECTY = TypeVect::make(T_FLOAT,8); |
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503 } |
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504 mreg2type[Op_VecS] = TypeVect::VECTS; |
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505 mreg2type[Op_VecD] = TypeVect::VECTD; |
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506 mreg2type[Op_VecX] = TypeVect::VECTX; |
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507 mreg2type[Op_VecY] = TypeVect::VECTY; |
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508 |
0 | 509 // Restore working type arena. |
510 current->set_type_arena(save); | |
511 current->set_type_dict(NULL); | |
512 } | |
513 | |
514 //------------------------------Initialize------------------------------------- | |
515 void Type::Initialize(Compile* current) { | |
516 assert(current->type_arena() != NULL, "must have created type arena"); | |
517 | |
518 if (_shared_type_dict == NULL) { | |
519 Initialize_shared(current); | |
520 } | |
521 | |
522 Arena* type_arena = current->type_arena(); | |
523 | |
524 // Create the hash-cons'ing dictionary with top-level storage allocation | |
525 Dict *tdic = new (type_arena) Dict( (CmpKey)Type::cmp,(Hash)Type::uhash, type_arena, 128 ); | |
526 current->set_type_dict(tdic); | |
527 | |
528 // Transfer the shared types. | |
529 DictI i(_shared_type_dict); | |
530 for( ; i.test(); ++i ) { | |
531 Type* t = (Type*)i._value; | |
532 tdic->Insert(t,t); // New Type, insert into Type table | |
533 } | |
534 } | |
535 | |
536 //------------------------------hashcons--------------------------------------- | |
537 // Do the hash-cons trick. If the Type already exists in the type table, | |
538 // delete the current Type and return the existing Type. Otherwise stick the | |
539 // current Type in the Type table. | |
540 const Type *Type::hashcons(void) { | |
541 debug_only(base()); // Check the assertion in Type::base(). | |
542 // Look up the Type in the Type dictionary | |
543 Dict *tdic = type_dict(); | |
544 Type* old = (Type*)(tdic->Insert(this, this, false)); | |
545 if( old ) { // Pre-existing Type? | |
546 if( old != this ) // Yes, this guy is not the pre-existing? | |
547 delete this; // Yes, Nuke this guy | |
548 assert( old->_dual, "" ); | |
549 return old; // Return pre-existing | |
550 } | |
551 | |
552 // Every type has a dual (to make my lattice symmetric). | |
553 // Since we just discovered a new Type, compute its dual right now. | |
554 assert( !_dual, "" ); // No dual yet | |
555 _dual = xdual(); // Compute the dual | |
556 if( cmp(this,_dual)==0 ) { // Handle self-symmetric | |
557 _dual = this; | |
558 return this; | |
559 } | |
560 assert( !_dual->_dual, "" ); // No reverse dual yet | |
561 assert( !(*tdic)[_dual], "" ); // Dual not in type system either | |
562 // New Type, insert into Type table | |
563 tdic->Insert((void*)_dual,(void*)_dual); | |
564 ((Type*)_dual)->_dual = this; // Finish up being symmetric | |
565 #ifdef ASSERT | |
566 Type *dual_dual = (Type*)_dual->xdual(); | |
567 assert( eq(dual_dual), "xdual(xdual()) should be identity" ); | |
568 delete dual_dual; | |
569 #endif | |
570 return this; // Return new Type | |
571 } | |
572 | |
573 //------------------------------eq--------------------------------------------- | |
574 // Structural equality check for Type representations | |
575 bool Type::eq( const Type * ) const { | |
576 return true; // Nothing else can go wrong | |
577 } | |
578 | |
579 //------------------------------hash------------------------------------------- | |
580 // Type-specific hashing function. | |
581 int Type::hash(void) const { | |
582 return _base; | |
583 } | |
584 | |
585 //------------------------------is_finite-------------------------------------- | |
586 // Has a finite value | |
587 bool Type::is_finite() const { | |
588 return false; | |
589 } | |
590 | |
591 //------------------------------is_nan----------------------------------------- | |
592 // Is not a number (NaN) | |
593 bool Type::is_nan() const { | |
594 return false; | |
595 } | |
596 | |
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597 //----------------------interface_vs_oop--------------------------------------- |
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598 #ifdef ASSERT |
12966 | 599 bool Type::interface_vs_oop_helper(const Type *t) const { |
820
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600 bool result = false; |
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601 |
992 | 602 const TypePtr* this_ptr = this->make_ptr(); // In case it is narrow_oop |
603 const TypePtr* t_ptr = t->make_ptr(); | |
604 if( this_ptr == NULL || t_ptr == NULL ) | |
605 return result; | |
606 | |
607 const TypeInstPtr* this_inst = this_ptr->isa_instptr(); | |
608 const TypeInstPtr* t_inst = t_ptr->isa_instptr(); | |
820
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609 if( this_inst && this_inst->is_loaded() && t_inst && t_inst->is_loaded() ) { |
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610 bool this_interface = this_inst->klass()->is_interface(); |
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611 bool t_interface = t_inst->klass()->is_interface(); |
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612 result = this_interface ^ t_interface; |
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613 } |
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614 |
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615 return result; |
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616 } |
12966 | 617 |
618 bool Type::interface_vs_oop(const Type *t) const { | |
619 if (interface_vs_oop_helper(t)) { | |
620 return true; | |
621 } | |
622 // Now check the speculative parts as well | |
623 const TypeOopPtr* this_spec = isa_oopptr() != NULL ? isa_oopptr()->speculative() : NULL; | |
624 const TypeOopPtr* t_spec = t->isa_oopptr() != NULL ? t->isa_oopptr()->speculative() : NULL; | |
625 if (this_spec != NULL && t_spec != NULL) { | |
626 if (this_spec->interface_vs_oop_helper(t_spec)) { | |
627 return true; | |
628 } | |
629 return false; | |
630 } | |
631 if (this_spec != NULL && this_spec->interface_vs_oop_helper(t)) { | |
632 return true; | |
633 } | |
634 if (t_spec != NULL && interface_vs_oop_helper(t_spec)) { | |
635 return true; | |
636 } | |
637 return false; | |
638 } | |
639 | |
820
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640 #endif |
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641 |
0 | 642 //------------------------------meet------------------------------------------- |
643 // Compute the MEET of two types. NOT virtual. It enforces that meet is | |
644 // commutative and the lattice is symmetric. | |
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645 const Type *Type::meet_helper(const Type *t, bool include_speculative) const { |
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646 if (isa_narrowoop() && t->isa_narrowoop()) { |
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647 const Type* result = make_ptr()->meet_helper(t->make_ptr(), include_speculative); |
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648 return result->make_narrowoop(); |
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649 } |
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650 if (isa_narrowklass() && t->isa_narrowklass()) { |
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651 const Type* result = make_ptr()->meet_helper(t->make_ptr(), include_speculative); |
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652 return result->make_narrowklass(); |
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653 } |
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654 |
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655 const Type *this_t = maybe_remove_speculative(include_speculative); |
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656 t = t->maybe_remove_speculative(include_speculative); |
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657 |
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658 const Type *mt = this_t->xmeet(t); |
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659 if (isa_narrowoop() || t->isa_narrowoop()) return mt; |
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660 if (isa_narrowklass() || t->isa_narrowklass()) return mt; |
0 | 661 #ifdef ASSERT |
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662 assert(mt == t->xmeet(this_t), "meet not commutative"); |
0 | 663 const Type* dual_join = mt->_dual; |
664 const Type *t2t = dual_join->xmeet(t->_dual); | |
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665 const Type *t2this = dual_join->xmeet(this_t->_dual); |
0 | 666 |
667 // Interface meet Oop is Not Symmetric: | |
668 // Interface:AnyNull meet Oop:AnyNull == Interface:AnyNull | |
669 // Interface:NotNull meet Oop:NotNull == java/lang/Object:NotNull | |
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670 |
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671 if( !interface_vs_oop(t) && (t2t != t->_dual || t2this != this_t->_dual) ) { |
0 | 672 tty->print_cr("=== Meet Not Symmetric ==="); |
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673 tty->print("t = "); t->dump(); tty->cr(); |
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674 tty->print("this= "); this_t->dump(); tty->cr(); |
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675 tty->print("mt=(t meet this)= "); mt->dump(); tty->cr(); |
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676 |
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677 tty->print("t_dual= "); t->_dual->dump(); tty->cr(); |
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678 tty->print("this_dual= "); this_t->_dual->dump(); tty->cr(); |
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679 tty->print("mt_dual= "); mt->_dual->dump(); tty->cr(); |
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680 |
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681 tty->print("mt_dual meet t_dual= "); t2t ->dump(); tty->cr(); |
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682 tty->print("mt_dual meet this_dual= "); t2this ->dump(); tty->cr(); |
0 | 683 |
684 fatal("meet not symmetric" ); | |
685 } | |
686 #endif | |
687 return mt; | |
688 } | |
689 | |
690 //------------------------------xmeet------------------------------------------ | |
691 // Compute the MEET of two types. It returns a new Type object. | |
692 const Type *Type::xmeet( const Type *t ) const { | |
693 // Perform a fast test for common case; meeting the same types together. | |
694 if( this == t ) return this; // Meeting same type-rep? | |
695 | |
696 // Meeting TOP with anything? | |
697 if( _base == Top ) return t; | |
698 | |
699 // Meeting BOTTOM with anything? | |
700 if( _base == Bottom ) return BOTTOM; | |
701 | |
702 // Current "this->_base" is one of: Bad, Multi, Control, Top, | |
703 // Abio, Abstore, Floatxxx, Doublexxx, Bottom, lastype. | |
704 switch (t->base()) { // Switch on original type | |
705 | |
706 // Cut in half the number of cases I must handle. Only need cases for when | |
707 // the given enum "t->type" is less than or equal to the local enum "type". | |
708 case FloatCon: | |
709 case DoubleCon: | |
710 case Int: | |
711 case Long: | |
712 return t->xmeet(this); | |
713 | |
714 case OopPtr: | |
715 return t->xmeet(this); | |
716 | |
717 case InstPtr: | |
718 return t->xmeet(this); | |
719 | |
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720 case MetadataPtr: |
0 | 721 case KlassPtr: |
722 return t->xmeet(this); | |
723 | |
724 case AryPtr: | |
725 return t->xmeet(this); | |
726 | |
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727 case NarrowOop: |
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728 return t->xmeet(this); |
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729 |
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730 case NarrowKlass: |
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731 return t->xmeet(this); |
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732 |
0 | 733 case Bad: // Type check |
734 default: // Bogus type not in lattice | |
735 typerr(t); | |
736 return Type::BOTTOM; | |
737 | |
738 case Bottom: // Ye Olde Default | |
739 return t; | |
740 | |
741 case FloatTop: | |
742 if( _base == FloatTop ) return this; | |
743 case FloatBot: // Float | |
744 if( _base == FloatBot || _base == FloatTop ) return FLOAT; | |
745 if( _base == DoubleTop || _base == DoubleBot ) return Type::BOTTOM; | |
746 typerr(t); | |
747 return Type::BOTTOM; | |
748 | |
749 case DoubleTop: | |
750 if( _base == DoubleTop ) return this; | |
751 case DoubleBot: // Double | |
752 if( _base == DoubleBot || _base == DoubleTop ) return DOUBLE; | |
753 if( _base == FloatTop || _base == FloatBot ) return Type::BOTTOM; | |
754 typerr(t); | |
755 return Type::BOTTOM; | |
756 | |
757 // These next few cases must match exactly or it is a compile-time error. | |
758 case Control: // Control of code | |
759 case Abio: // State of world outside of program | |
760 case Memory: | |
761 if( _base == t->_base ) return this; | |
762 typerr(t); | |
763 return Type::BOTTOM; | |
764 | |
765 case Top: // Top of the lattice | |
766 return this; | |
767 } | |
768 | |
769 // The type is unchanged | |
770 return this; | |
771 } | |
772 | |
773 //-----------------------------filter------------------------------------------ | |
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774 const Type *Type::filter_helper(const Type *kills, bool include_speculative) const { |
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775 const Type* ft = join_helper(kills, include_speculative); |
0 | 776 if (ft->empty()) |
777 return Type::TOP; // Canonical empty value | |
778 return ft; | |
779 } | |
780 | |
781 //------------------------------xdual------------------------------------------ | |
782 // Compute dual right now. | |
783 const Type::TYPES Type::dual_type[Type::lastype] = { | |
784 Bad, // Bad | |
785 Control, // Control | |
786 Bottom, // Top | |
787 Bad, // Int - handled in v-call | |
788 Bad, // Long - handled in v-call | |
789 Half, // Half | |
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790 Bad, // NarrowOop - handled in v-call |
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791 Bad, // NarrowKlass - handled in v-call |
0 | 792 |
793 Bad, // Tuple - handled in v-call | |
794 Bad, // Array - handled in v-call | |
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795 Bad, // VectorS - handled in v-call |
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796 Bad, // VectorD - handled in v-call |
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797 Bad, // VectorX - handled in v-call |
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798 Bad, // VectorY - handled in v-call |
0 | 799 |
800 Bad, // AnyPtr - handled in v-call | |
801 Bad, // RawPtr - handled in v-call | |
802 Bad, // OopPtr - handled in v-call | |
803 Bad, // InstPtr - handled in v-call | |
804 Bad, // AryPtr - handled in v-call | |
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805 |
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806 Bad, // MetadataPtr - handled in v-call |
0 | 807 Bad, // KlassPtr - handled in v-call |
808 | |
809 Bad, // Function - handled in v-call | |
810 Abio, // Abio | |
811 Return_Address,// Return_Address | |
812 Memory, // Memory | |
813 FloatBot, // FloatTop | |
814 FloatCon, // FloatCon | |
815 FloatTop, // FloatBot | |
816 DoubleBot, // DoubleTop | |
817 DoubleCon, // DoubleCon | |
818 DoubleTop, // DoubleBot | |
819 Top // Bottom | |
820 }; | |
821 | |
822 const Type *Type::xdual() const { | |
823 // Note: the base() accessor asserts the sanity of _base. | |
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824 assert(_type_info[base()].dual_type != Bad, "implement with v-call"); |
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825 return new Type(_type_info[_base].dual_type); |
0 | 826 } |
827 | |
828 //------------------------------has_memory------------------------------------- | |
829 bool Type::has_memory() const { | |
830 Type::TYPES tx = base(); | |
831 if (tx == Memory) return true; | |
832 if (tx == Tuple) { | |
833 const TypeTuple *t = is_tuple(); | |
834 for (uint i=0; i < t->cnt(); i++) { | |
835 tx = t->field_at(i)->base(); | |
836 if (tx == Memory) return true; | |
837 } | |
838 } | |
839 return false; | |
840 } | |
841 | |
842 #ifndef PRODUCT | |
843 //------------------------------dump2------------------------------------------ | |
844 void Type::dump2( Dict &d, uint depth, outputStream *st ) const { | |
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845 st->print(_type_info[_base].msg); |
0 | 846 } |
847 | |
848 //------------------------------dump------------------------------------------- | |
849 void Type::dump_on(outputStream *st) const { | |
850 ResourceMark rm; | |
851 Dict d(cmpkey,hashkey); // Stop recursive type dumping | |
852 dump2(d,1, st); | |
163 | 853 if (is_ptr_to_narrowoop()) { |
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854 st->print(" [narrow]"); |
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855 } else if (is_ptr_to_narrowklass()) { |
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856 st->print(" [narrowklass]"); |
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857 } |
0 | 858 } |
859 #endif | |
860 | |
861 //------------------------------singleton-------------------------------------- | |
862 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
863 // constants (Ldi nodes). Singletons are integer, float or double constants. | |
864 bool Type::singleton(void) const { | |
865 return _base == Top || _base == Half; | |
866 } | |
867 | |
868 //------------------------------empty------------------------------------------ | |
869 // TRUE if Type is a type with no values, FALSE otherwise. | |
870 bool Type::empty(void) const { | |
871 switch (_base) { | |
872 case DoubleTop: | |
873 case FloatTop: | |
874 case Top: | |
875 return true; | |
876 | |
877 case Half: | |
878 case Abio: | |
879 case Return_Address: | |
880 case Memory: | |
881 case Bottom: | |
882 case FloatBot: | |
883 case DoubleBot: | |
884 return false; // never a singleton, therefore never empty | |
885 } | |
886 | |
887 ShouldNotReachHere(); | |
888 return false; | |
889 } | |
890 | |
891 //------------------------------dump_stats------------------------------------- | |
892 // Dump collected statistics to stderr | |
893 #ifndef PRODUCT | |
894 void Type::dump_stats() { | |
895 tty->print("Types made: %d\n", type_dict()->Size()); | |
896 } | |
897 #endif | |
898 | |
899 //------------------------------typerr----------------------------------------- | |
900 void Type::typerr( const Type *t ) const { | |
901 #ifndef PRODUCT | |
902 tty->print("\nError mixing types: "); | |
903 dump(); | |
904 tty->print(" and "); | |
905 t->dump(); | |
906 tty->print("\n"); | |
907 #endif | |
908 ShouldNotReachHere(); | |
909 } | |
910 | |
911 | |
912 //============================================================================= | |
913 // Convenience common pre-built types. | |
914 const TypeF *TypeF::ZERO; // Floating point zero | |
915 const TypeF *TypeF::ONE; // Floating point one | |
916 | |
917 //------------------------------make------------------------------------------- | |
918 // Create a float constant | |
919 const TypeF *TypeF::make(float f) { | |
920 return (TypeF*)(new TypeF(f))->hashcons(); | |
921 } | |
922 | |
923 //------------------------------meet------------------------------------------- | |
924 // Compute the MEET of two types. It returns a new Type object. | |
925 const Type *TypeF::xmeet( const Type *t ) const { | |
926 // Perform a fast test for common case; meeting the same types together. | |
927 if( this == t ) return this; // Meeting same type-rep? | |
928 | |
929 // Current "this->_base" is FloatCon | |
930 switch (t->base()) { // Switch on original type | |
931 case AnyPtr: // Mixing with oops happens when javac | |
932 case RawPtr: // reuses local variables | |
933 case OopPtr: | |
934 case InstPtr: | |
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935 case AryPtr: |
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936 case MetadataPtr: |
0 | 937 case KlassPtr: |
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938 case NarrowOop: |
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939 case NarrowKlass: |
0 | 940 case Int: |
941 case Long: | |
942 case DoubleTop: | |
943 case DoubleCon: | |
944 case DoubleBot: | |
945 case Bottom: // Ye Olde Default | |
946 return Type::BOTTOM; | |
947 | |
948 case FloatBot: | |
949 return t; | |
950 | |
951 default: // All else is a mistake | |
952 typerr(t); | |
953 | |
954 case FloatCon: // Float-constant vs Float-constant? | |
955 if( jint_cast(_f) != jint_cast(t->getf()) ) // unequal constants? | |
956 // must compare bitwise as positive zero, negative zero and NaN have | |
957 // all the same representation in C++ | |
958 return FLOAT; // Return generic float | |
959 // Equal constants | |
960 case Top: | |
961 case FloatTop: | |
962 break; // Return the float constant | |
963 } | |
964 return this; // Return the float constant | |
965 } | |
966 | |
967 //------------------------------xdual------------------------------------------ | |
968 // Dual: symmetric | |
969 const Type *TypeF::xdual() const { | |
970 return this; | |
971 } | |
972 | |
973 //------------------------------eq--------------------------------------------- | |
974 // Structural equality check for Type representations | |
975 bool TypeF::eq( const Type *t ) const { | |
976 if( g_isnan(_f) || | |
977 g_isnan(t->getf()) ) { | |
978 // One or both are NANs. If both are NANs return true, else false. | |
979 return (g_isnan(_f) && g_isnan(t->getf())); | |
980 } | |
981 if (_f == t->getf()) { | |
982 // (NaN is impossible at this point, since it is not equal even to itself) | |
983 if (_f == 0.0) { | |
984 // difference between positive and negative zero | |
985 if (jint_cast(_f) != jint_cast(t->getf())) return false; | |
986 } | |
987 return true; | |
988 } | |
989 return false; | |
990 } | |
991 | |
992 //------------------------------hash------------------------------------------- | |
993 // Type-specific hashing function. | |
994 int TypeF::hash(void) const { | |
995 return *(int*)(&_f); | |
996 } | |
997 | |
998 //------------------------------is_finite-------------------------------------- | |
999 // Has a finite value | |
1000 bool TypeF::is_finite() const { | |
1001 return g_isfinite(getf()) != 0; | |
1002 } | |
1003 | |
1004 //------------------------------is_nan----------------------------------------- | |
1005 // Is not a number (NaN) | |
1006 bool TypeF::is_nan() const { | |
1007 return g_isnan(getf()) != 0; | |
1008 } | |
1009 | |
1010 //------------------------------dump2------------------------------------------ | |
1011 // Dump float constant Type | |
1012 #ifndef PRODUCT | |
1013 void TypeF::dump2( Dict &d, uint depth, outputStream *st ) const { | |
1014 Type::dump2(d,depth, st); | |
1015 st->print("%f", _f); | |
1016 } | |
1017 #endif | |
1018 | |
1019 //------------------------------singleton-------------------------------------- | |
1020 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
1021 // constants (Ldi nodes). Singletons are integer, float or double constants | |
1022 // or a single symbol. | |
1023 bool TypeF::singleton(void) const { | |
1024 return true; // Always a singleton | |
1025 } | |
1026 | |
1027 bool TypeF::empty(void) const { | |
1028 return false; // always exactly a singleton | |
1029 } | |
1030 | |
1031 //============================================================================= | |
1032 // Convenience common pre-built types. | |
1033 const TypeD *TypeD::ZERO; // Floating point zero | |
1034 const TypeD *TypeD::ONE; // Floating point one | |
1035 | |
1036 //------------------------------make------------------------------------------- | |
1037 const TypeD *TypeD::make(double d) { | |
1038 return (TypeD*)(new TypeD(d))->hashcons(); | |
1039 } | |
1040 | |
1041 //------------------------------meet------------------------------------------- | |
1042 // Compute the MEET of two types. It returns a new Type object. | |
1043 const Type *TypeD::xmeet( const Type *t ) const { | |
1044 // Perform a fast test for common case; meeting the same types together. | |
1045 if( this == t ) return this; // Meeting same type-rep? | |
1046 | |
1047 // Current "this->_base" is DoubleCon | |
1048 switch (t->base()) { // Switch on original type | |
1049 case AnyPtr: // Mixing with oops happens when javac | |
1050 case RawPtr: // reuses local variables | |
1051 case OopPtr: | |
1052 case InstPtr: | |
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1053 case AryPtr: |
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1054 case MetadataPtr: |
0 | 1055 case KlassPtr: |
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1056 case NarrowOop: |
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1057 case NarrowKlass: |
0 | 1058 case Int: |
1059 case Long: | |
1060 case FloatTop: | |
1061 case FloatCon: | |
1062 case FloatBot: | |
1063 case Bottom: // Ye Olde Default | |
1064 return Type::BOTTOM; | |
1065 | |
1066 case DoubleBot: | |
1067 return t; | |
1068 | |
1069 default: // All else is a mistake | |
1070 typerr(t); | |
1071 | |
1072 case DoubleCon: // Double-constant vs Double-constant? | |
1073 if( jlong_cast(_d) != jlong_cast(t->getd()) ) // unequal constants? (see comment in TypeF::xmeet) | |
1074 return DOUBLE; // Return generic double | |
1075 case Top: | |
1076 case DoubleTop: | |
1077 break; | |
1078 } | |
1079 return this; // Return the double constant | |
1080 } | |
1081 | |
1082 //------------------------------xdual------------------------------------------ | |
1083 // Dual: symmetric | |
1084 const Type *TypeD::xdual() const { | |
1085 return this; | |
1086 } | |
1087 | |
1088 //------------------------------eq--------------------------------------------- | |
1089 // Structural equality check for Type representations | |
1090 bool TypeD::eq( const Type *t ) const { | |
1091 if( g_isnan(_d) || | |
1092 g_isnan(t->getd()) ) { | |
1093 // One or both are NANs. If both are NANs return true, else false. | |
1094 return (g_isnan(_d) && g_isnan(t->getd())); | |
1095 } | |
1096 if (_d == t->getd()) { | |
1097 // (NaN is impossible at this point, since it is not equal even to itself) | |
1098 if (_d == 0.0) { | |
1099 // difference between positive and negative zero | |
1100 if (jlong_cast(_d) != jlong_cast(t->getd())) return false; | |
1101 } | |
1102 return true; | |
1103 } | |
1104 return false; | |
1105 } | |
1106 | |
1107 //------------------------------hash------------------------------------------- | |
1108 // Type-specific hashing function. | |
1109 int TypeD::hash(void) const { | |
1110 return *(int*)(&_d); | |
1111 } | |
1112 | |
1113 //------------------------------is_finite-------------------------------------- | |
1114 // Has a finite value | |
1115 bool TypeD::is_finite() const { | |
1116 return g_isfinite(getd()) != 0; | |
1117 } | |
1118 | |
1119 //------------------------------is_nan----------------------------------------- | |
1120 // Is not a number (NaN) | |
1121 bool TypeD::is_nan() const { | |
1122 return g_isnan(getd()) != 0; | |
1123 } | |
1124 | |
1125 //------------------------------dump2------------------------------------------ | |
1126 // Dump double constant Type | |
1127 #ifndef PRODUCT | |
1128 void TypeD::dump2( Dict &d, uint depth, outputStream *st ) const { | |
1129 Type::dump2(d,depth,st); | |
1130 st->print("%f", _d); | |
1131 } | |
1132 #endif | |
1133 | |
1134 //------------------------------singleton-------------------------------------- | |
1135 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
1136 // constants (Ldi nodes). Singletons are integer, float or double constants | |
1137 // or a single symbol. | |
1138 bool TypeD::singleton(void) const { | |
1139 return true; // Always a singleton | |
1140 } | |
1141 | |
1142 bool TypeD::empty(void) const { | |
1143 return false; // always exactly a singleton | |
1144 } | |
1145 | |
1146 //============================================================================= | |
1147 // Convience common pre-built types. | |
1148 const TypeInt *TypeInt::MINUS_1;// -1 | |
1149 const TypeInt *TypeInt::ZERO; // 0 | |
1150 const TypeInt *TypeInt::ONE; // 1 | |
1151 const TypeInt *TypeInt::BOOL; // 0 or 1, FALSE or TRUE. | |
1152 const TypeInt *TypeInt::CC; // -1,0 or 1, condition codes | |
1153 const TypeInt *TypeInt::CC_LT; // [-1] == MINUS_1 | |
1154 const TypeInt *TypeInt::CC_GT; // [1] == ONE | |
1155 const TypeInt *TypeInt::CC_EQ; // [0] == ZERO | |
1156 const TypeInt *TypeInt::CC_LE; // [-1,0] | |
1157 const TypeInt *TypeInt::CC_GE; // [0,1] == BOOL (!) | |
1158 const TypeInt *TypeInt::BYTE; // Bytes, -128 to 127 | |
624 | 1159 const TypeInt *TypeInt::UBYTE; // Unsigned Bytes, 0 to 255 |
0 | 1160 const TypeInt *TypeInt::CHAR; // Java chars, 0-65535 |
1161 const TypeInt *TypeInt::SHORT; // Java shorts, -32768-32767 | |
1162 const TypeInt *TypeInt::POS; // Positive 32-bit integers or zero | |
1163 const TypeInt *TypeInt::POS1; // Positive 32-bit integers | |
1164 const TypeInt *TypeInt::INT; // 32-bit integers | |
1165 const TypeInt *TypeInt::SYMINT; // symmetric range [-max_jint..max_jint] | |
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1166 const TypeInt *TypeInt::TYPE_DOMAIN; // alias for TypeInt::INT |
0 | 1167 |
1168 //------------------------------TypeInt---------------------------------------- | |
1169 TypeInt::TypeInt( jint lo, jint hi, int w ) : Type(Int), _lo(lo), _hi(hi), _widen(w) { | |
1170 } | |
1171 | |
1172 //------------------------------make------------------------------------------- | |
1173 const TypeInt *TypeInt::make( jint lo ) { | |
1174 return (TypeInt*)(new TypeInt(lo,lo,WidenMin))->hashcons(); | |
1175 } | |
1176 | |
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1177 static int normalize_int_widen( jint lo, jint hi, int w ) { |
0 | 1178 // Certain normalizations keep us sane when comparing types. |
1179 // The 'SMALLINT' covers constants and also CC and its relatives. | |
1180 if (lo <= hi) { | |
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1181 if ((juint)(hi - lo) <= SMALLINT) w = Type::WidenMin; |
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1182 if ((juint)(hi - lo) >= max_juint) w = Type::WidenMax; // TypeInt::INT |
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1183 } else { |
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1184 if ((juint)(lo - hi) <= SMALLINT) w = Type::WidenMin; |
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1185 if ((juint)(lo - hi) >= max_juint) w = Type::WidenMin; // dual TypeInt::INT |
0 | 1186 } |
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1187 return w; |
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1188 } |
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1189 |
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1190 const TypeInt *TypeInt::make( jint lo, jint hi, int w ) { |
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1191 w = normalize_int_widen(lo, hi, w); |
0 | 1192 return (TypeInt*)(new TypeInt(lo,hi,w))->hashcons(); |
1193 } | |
1194 | |
1195 //------------------------------meet------------------------------------------- | |
1196 // Compute the MEET of two types. It returns a new Type representation object | |
1197 // with reference count equal to the number of Types pointing at it. | |
1198 // Caller should wrap a Types around it. | |
1199 const Type *TypeInt::xmeet( const Type *t ) const { | |
1200 // Perform a fast test for common case; meeting the same types together. | |
1201 if( this == t ) return this; // Meeting same type? | |
1202 | |
1203 // Currently "this->_base" is a TypeInt | |
1204 switch (t->base()) { // Switch on original type | |
1205 case AnyPtr: // Mixing with oops happens when javac | |
1206 case RawPtr: // reuses local variables | |
1207 case OopPtr: | |
1208 case InstPtr: | |
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1209 case AryPtr: |
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1210 case MetadataPtr: |
0 | 1211 case KlassPtr: |
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1212 case NarrowOop: |
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1213 case NarrowKlass: |
0 | 1214 case Long: |
1215 case FloatTop: | |
1216 case FloatCon: | |
1217 case FloatBot: | |
1218 case DoubleTop: | |
1219 case DoubleCon: | |
1220 case DoubleBot: | |
1221 case Bottom: // Ye Olde Default | |
1222 return Type::BOTTOM; | |
1223 default: // All else is a mistake | |
1224 typerr(t); | |
1225 case Top: // No change | |
1226 return this; | |
1227 case Int: // Int vs Int? | |
1228 break; | |
1229 } | |
1230 | |
1231 // Expand covered set | |
1232 const TypeInt *r = t->is_int(); | |
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1233 return make( MIN2(_lo,r->_lo), MAX2(_hi,r->_hi), MAX2(_widen,r->_widen) ); |
0 | 1234 } |
1235 | |
1236 //------------------------------xdual------------------------------------------ | |
1237 // Dual: reverse hi & lo; flip widen | |
1238 const Type *TypeInt::xdual() const { | |
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1239 int w = normalize_int_widen(_hi,_lo, WidenMax-_widen); |
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1240 return new TypeInt(_hi,_lo,w); |
0 | 1241 } |
1242 | |
1243 //------------------------------widen------------------------------------------ | |
1244 // Only happens for optimistic top-down optimizations. | |
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1245 const Type *TypeInt::widen( const Type *old, const Type* limit ) const { |
0 | 1246 // Coming from TOP or such; no widening |
1247 if( old->base() != Int ) return this; | |
1248 const TypeInt *ot = old->is_int(); | |
1249 | |
1250 // If new guy is equal to old guy, no widening | |
1251 if( _lo == ot->_lo && _hi == ot->_hi ) | |
1252 return old; | |
1253 | |
1254 // If new guy contains old, then we widened | |
1255 if( _lo <= ot->_lo && _hi >= ot->_hi ) { | |
1256 // New contains old | |
1257 // If new guy is already wider than old, no widening | |
1258 if( _widen > ot->_widen ) return this; | |
1259 // If old guy was a constant, do not bother | |
1260 if (ot->_lo == ot->_hi) return this; | |
1261 // Now widen new guy. | |
1262 // Check for widening too far | |
1263 if (_widen == WidenMax) { | |
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1264 int max = max_jint; |
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1265 int min = min_jint; |
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1266 if (limit->isa_int()) { |
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1267 max = limit->is_int()->_hi; |
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1268 min = limit->is_int()->_lo; |
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1269 } |
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1270 if (min < _lo && _hi < max) { |
0 | 1271 // If neither endpoint is extremal yet, push out the endpoint |
1272 // which is closer to its respective limit. | |
1273 if (_lo >= 0 || // easy common case | |
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1274 (juint)(_lo - min) >= (juint)(max - _hi)) { |
0 | 1275 // Try to widen to an unsigned range type of 31 bits: |
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1276 return make(_lo, max, WidenMax); |
0 | 1277 } else { |
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1278 return make(min, _hi, WidenMax); |
0 | 1279 } |
1280 } | |
1281 return TypeInt::INT; | |
1282 } | |
1283 // Returned widened new guy | |
1284 return make(_lo,_hi,_widen+1); | |
1285 } | |
1286 | |
1287 // If old guy contains new, then we probably widened too far & dropped to | |
1288 // bottom. Return the wider fellow. | |
1289 if ( ot->_lo <= _lo && ot->_hi >= _hi ) | |
1290 return old; | |
1291 | |
1292 //fatal("Integer value range is not subset"); | |
1293 //return this; | |
1294 return TypeInt::INT; | |
1295 } | |
1296 | |
1297 //------------------------------narrow--------------------------------------- | |
1298 // Only happens for pessimistic optimizations. | |
1299 const Type *TypeInt::narrow( const Type *old ) const { | |
1300 if (_lo >= _hi) return this; // already narrow enough | |
1301 if (old == NULL) return this; | |
1302 const TypeInt* ot = old->isa_int(); | |
1303 if (ot == NULL) return this; | |
1304 jint olo = ot->_lo; | |
1305 jint ohi = ot->_hi; | |
1306 | |
1307 // If new guy is equal to old guy, no narrowing | |
1308 if (_lo == olo && _hi == ohi) return old; | |
1309 | |
1310 // If old guy was maximum range, allow the narrowing | |
1311 if (olo == min_jint && ohi == max_jint) return this; | |
1312 | |
1313 if (_lo < olo || _hi > ohi) | |
1314 return this; // doesn't narrow; pretty wierd | |
1315 | |
1316 // The new type narrows the old type, so look for a "death march". | |
1317 // See comments on PhaseTransform::saturate. | |
1318 juint nrange = _hi - _lo; | |
1319 juint orange = ohi - olo; | |
1320 if (nrange < max_juint - 1 && nrange > (orange >> 1) + (SMALLINT*2)) { | |
1321 // Use the new type only if the range shrinks a lot. | |
1322 // We do not want the optimizer computing 2^31 point by point. | |
1323 return old; | |
1324 } | |
1325 | |
1326 return this; | |
1327 } | |
1328 | |
1329 //-----------------------------filter------------------------------------------ | |
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1330 const Type *TypeInt::filter_helper(const Type *kills, bool include_speculative) const { |
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1331 const TypeInt* ft = join_helper(kills, include_speculative)->isa_int(); |
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1332 if (ft == NULL || ft->empty()) |
0 | 1333 return Type::TOP; // Canonical empty value |
1334 if (ft->_widen < this->_widen) { | |
1335 // Do not allow the value of kill->_widen to affect the outcome. | |
1336 // The widen bits must be allowed to run freely through the graph. | |
1337 ft = TypeInt::make(ft->_lo, ft->_hi, this->_widen); | |
1338 } | |
1339 return ft; | |
1340 } | |
1341 | |
1342 //------------------------------eq--------------------------------------------- | |
1343 // Structural equality check for Type representations | |
1344 bool TypeInt::eq( const Type *t ) const { | |
1345 const TypeInt *r = t->is_int(); // Handy access | |
1346 return r->_lo == _lo && r->_hi == _hi && r->_widen == _widen; | |
1347 } | |
1348 | |
1349 //------------------------------hash------------------------------------------- | |
1350 // Type-specific hashing function. | |
1351 int TypeInt::hash(void) const { | |
1352 return _lo+_hi+_widen+(int)Type::Int; | |
1353 } | |
1354 | |
1355 //------------------------------is_finite-------------------------------------- | |
1356 // Has a finite value | |
1357 bool TypeInt::is_finite() const { | |
1358 return true; | |
1359 } | |
1360 | |
1361 //------------------------------dump2------------------------------------------ | |
1362 // Dump TypeInt | |
1363 #ifndef PRODUCT | |
1364 static const char* intname(char* buf, jint n) { | |
1365 if (n == min_jint) | |
1366 return "min"; | |
1367 else if (n < min_jint + 10000) | |
1368 sprintf(buf, "min+" INT32_FORMAT, n - min_jint); | |
1369 else if (n == max_jint) | |
1370 return "max"; | |
1371 else if (n > max_jint - 10000) | |
1372 sprintf(buf, "max-" INT32_FORMAT, max_jint - n); | |
1373 else | |
1374 sprintf(buf, INT32_FORMAT, n); | |
1375 return buf; | |
1376 } | |
1377 | |
1378 void TypeInt::dump2( Dict &d, uint depth, outputStream *st ) const { | |
1379 char buf[40], buf2[40]; | |
1380 if (_lo == min_jint && _hi == max_jint) | |
1381 st->print("int"); | |
1382 else if (is_con()) | |
1383 st->print("int:%s", intname(buf, get_con())); | |
1384 else if (_lo == BOOL->_lo && _hi == BOOL->_hi) | |
1385 st->print("bool"); | |
1386 else if (_lo == BYTE->_lo && _hi == BYTE->_hi) | |
1387 st->print("byte"); | |
1388 else if (_lo == CHAR->_lo && _hi == CHAR->_hi) | |
1389 st->print("char"); | |
1390 else if (_lo == SHORT->_lo && _hi == SHORT->_hi) | |
1391 st->print("short"); | |
1392 else if (_hi == max_jint) | |
1393 st->print("int:>=%s", intname(buf, _lo)); | |
1394 else if (_lo == min_jint) | |
1395 st->print("int:<=%s", intname(buf, _hi)); | |
1396 else | |
1397 st->print("int:%s..%s", intname(buf, _lo), intname(buf2, _hi)); | |
1398 | |
1399 if (_widen != 0 && this != TypeInt::INT) | |
1400 st->print(":%.*s", _widen, "wwww"); | |
1401 } | |
1402 #endif | |
1403 | |
1404 //------------------------------singleton-------------------------------------- | |
1405 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
1406 // constants. | |
1407 bool TypeInt::singleton(void) const { | |
1408 return _lo >= _hi; | |
1409 } | |
1410 | |
1411 bool TypeInt::empty(void) const { | |
1412 return _lo > _hi; | |
1413 } | |
1414 | |
1415 //============================================================================= | |
1416 // Convenience common pre-built types. | |
1417 const TypeLong *TypeLong::MINUS_1;// -1 | |
1418 const TypeLong *TypeLong::ZERO; // 0 | |
1419 const TypeLong *TypeLong::ONE; // 1 | |
1420 const TypeLong *TypeLong::POS; // >=0 | |
1421 const TypeLong *TypeLong::LONG; // 64-bit integers | |
1422 const TypeLong *TypeLong::INT; // 32-bit subrange | |
1423 const TypeLong *TypeLong::UINT; // 32-bit unsigned subrange | |
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1424 const TypeLong *TypeLong::TYPE_DOMAIN; // alias for TypeLong::LONG |
0 | 1425 |
1426 //------------------------------TypeLong--------------------------------------- | |
1427 TypeLong::TypeLong( jlong lo, jlong hi, int w ) : Type(Long), _lo(lo), _hi(hi), _widen(w) { | |
1428 } | |
1429 | |
1430 //------------------------------make------------------------------------------- | |
1431 const TypeLong *TypeLong::make( jlong lo ) { | |
1432 return (TypeLong*)(new TypeLong(lo,lo,WidenMin))->hashcons(); | |
1433 } | |
1434 | |
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1435 static int normalize_long_widen( jlong lo, jlong hi, int w ) { |
0 | 1436 // Certain normalizations keep us sane when comparing types. |
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1437 // The 'SMALLINT' covers constants. |
0 | 1438 if (lo <= hi) { |
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1439 if ((julong)(hi - lo) <= SMALLINT) w = Type::WidenMin; |
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1440 if ((julong)(hi - lo) >= max_julong) w = Type::WidenMax; // TypeLong::LONG |
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1441 } else { |
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1442 if ((julong)(lo - hi) <= SMALLINT) w = Type::WidenMin; |
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1443 if ((julong)(lo - hi) >= max_julong) w = Type::WidenMin; // dual TypeLong::LONG |
0 | 1444 } |
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1445 return w; |
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1446 } |
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1447 |
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1448 const TypeLong *TypeLong::make( jlong lo, jlong hi, int w ) { |
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1449 w = normalize_long_widen(lo, hi, w); |
0 | 1450 return (TypeLong*)(new TypeLong(lo,hi,w))->hashcons(); |
1451 } | |
1452 | |
1453 | |
1454 //------------------------------meet------------------------------------------- | |
1455 // Compute the MEET of two types. It returns a new Type representation object | |
1456 // with reference count equal to the number of Types pointing at it. | |
1457 // Caller should wrap a Types around it. | |
1458 const Type *TypeLong::xmeet( const Type *t ) const { | |
1459 // Perform a fast test for common case; meeting the same types together. | |
1460 if( this == t ) return this; // Meeting same type? | |
1461 | |
1462 // Currently "this->_base" is a TypeLong | |
1463 switch (t->base()) { // Switch on original type | |
1464 case AnyPtr: // Mixing with oops happens when javac | |
1465 case RawPtr: // reuses local variables | |
1466 case OopPtr: | |
1467 case InstPtr: | |
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1468 case AryPtr: |
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1469 case MetadataPtr: |
0 | 1470 case KlassPtr: |
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1471 case NarrowOop: |
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1472 case NarrowKlass: |
0 | 1473 case Int: |
1474 case FloatTop: | |
1475 case FloatCon: | |
1476 case FloatBot: | |
1477 case DoubleTop: | |
1478 case DoubleCon: | |
1479 case DoubleBot: | |
1480 case Bottom: // Ye Olde Default | |
1481 return Type::BOTTOM; | |
1482 default: // All else is a mistake | |
1483 typerr(t); | |
1484 case Top: // No change | |
1485 return this; | |
1486 case Long: // Long vs Long? | |
1487 break; | |
1488 } | |
1489 | |
1490 // Expand covered set | |
1491 const TypeLong *r = t->is_long(); // Turn into a TypeLong | |
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1492 return make( MIN2(_lo,r->_lo), MAX2(_hi,r->_hi), MAX2(_widen,r->_widen) ); |
0 | 1493 } |
1494 | |
1495 //------------------------------xdual------------------------------------------ | |
1496 // Dual: reverse hi & lo; flip widen | |
1497 const Type *TypeLong::xdual() const { | |
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1498 int w = normalize_long_widen(_hi,_lo, WidenMax-_widen); |
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1499 return new TypeLong(_hi,_lo,w); |
0 | 1500 } |
1501 | |
1502 //------------------------------widen------------------------------------------ | |
1503 // Only happens for optimistic top-down optimizations. | |
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1504 const Type *TypeLong::widen( const Type *old, const Type* limit ) const { |
0 | 1505 // Coming from TOP or such; no widening |
1506 if( old->base() != Long ) return this; | |
1507 const TypeLong *ot = old->is_long(); | |
1508 | |
1509 // If new guy is equal to old guy, no widening | |
1510 if( _lo == ot->_lo && _hi == ot->_hi ) | |
1511 return old; | |
1512 | |
1513 // If new guy contains old, then we widened | |
1514 if( _lo <= ot->_lo && _hi >= ot->_hi ) { | |
1515 // New contains old | |
1516 // If new guy is already wider than old, no widening | |
1517 if( _widen > ot->_widen ) return this; | |
1518 // If old guy was a constant, do not bother | |
1519 if (ot->_lo == ot->_hi) return this; | |
1520 // Now widen new guy. | |
1521 // Check for widening too far | |
1522 if (_widen == WidenMax) { | |
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1523 jlong max = max_jlong; |
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1524 jlong min = min_jlong; |
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1525 if (limit->isa_long()) { |
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1526 max = limit->is_long()->_hi; |
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1527 min = limit->is_long()->_lo; |
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1528 } |
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1529 if (min < _lo && _hi < max) { |
0 | 1530 // If neither endpoint is extremal yet, push out the endpoint |
1531 // which is closer to its respective limit. | |
1532 if (_lo >= 0 || // easy common case | |
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1533 (julong)(_lo - min) >= (julong)(max - _hi)) { |
0 | 1534 // Try to widen to an unsigned range type of 32/63 bits: |
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1535 if (max >= max_juint && _hi < max_juint) |
0 | 1536 return make(_lo, max_juint, WidenMax); |
1537 else | |
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1538 return make(_lo, max, WidenMax); |
0 | 1539 } else { |
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1540 return make(min, _hi, WidenMax); |
0 | 1541 } |
1542 } | |
1543 return TypeLong::LONG; | |
1544 } | |
1545 // Returned widened new guy | |
1546 return make(_lo,_hi,_widen+1); | |
1547 } | |
1548 | |
1549 // If old guy contains new, then we probably widened too far & dropped to | |
1550 // bottom. Return the wider fellow. | |
1551 if ( ot->_lo <= _lo && ot->_hi >= _hi ) | |
1552 return old; | |
1553 | |
1554 // fatal("Long value range is not subset"); | |
1555 // return this; | |
1556 return TypeLong::LONG; | |
1557 } | |
1558 | |
1559 //------------------------------narrow---------------------------------------- | |
1560 // Only happens for pessimistic optimizations. | |
1561 const Type *TypeLong::narrow( const Type *old ) const { | |
1562 if (_lo >= _hi) return this; // already narrow enough | |
1563 if (old == NULL) return this; | |
1564 const TypeLong* ot = old->isa_long(); | |
1565 if (ot == NULL) return this; | |
1566 jlong olo = ot->_lo; | |
1567 jlong ohi = ot->_hi; | |
1568 | |
1569 // If new guy is equal to old guy, no narrowing | |
1570 if (_lo == olo && _hi == ohi) return old; | |
1571 | |
1572 // If old guy was maximum range, allow the narrowing | |
1573 if (olo == min_jlong && ohi == max_jlong) return this; | |
1574 | |
1575 if (_lo < olo || _hi > ohi) | |
1576 return this; // doesn't narrow; pretty wierd | |
1577 | |
1578 // The new type narrows the old type, so look for a "death march". | |
1579 // See comments on PhaseTransform::saturate. | |
1580 julong nrange = _hi - _lo; | |
1581 julong orange = ohi - olo; | |
1582 if (nrange < max_julong - 1 && nrange > (orange >> 1) + (SMALLINT*2)) { | |
1583 // Use the new type only if the range shrinks a lot. | |
1584 // We do not want the optimizer computing 2^31 point by point. | |
1585 return old; | |
1586 } | |
1587 | |
1588 return this; | |
1589 } | |
1590 | |
1591 //-----------------------------filter------------------------------------------ | |
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1592 const Type *TypeLong::filter_helper(const Type *kills, bool include_speculative) const { |
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1593 const TypeLong* ft = join_helper(kills, include_speculative)->isa_long(); |
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1594 if (ft == NULL || ft->empty()) |
0 | 1595 return Type::TOP; // Canonical empty value |
1596 if (ft->_widen < this->_widen) { | |
1597 // Do not allow the value of kill->_widen to affect the outcome. | |
1598 // The widen bits must be allowed to run freely through the graph. | |
1599 ft = TypeLong::make(ft->_lo, ft->_hi, this->_widen); | |
1600 } | |
1601 return ft; | |
1602 } | |
1603 | |
1604 //------------------------------eq--------------------------------------------- | |
1605 // Structural equality check for Type representations | |
1606 bool TypeLong::eq( const Type *t ) const { | |
1607 const TypeLong *r = t->is_long(); // Handy access | |
1608 return r->_lo == _lo && r->_hi == _hi && r->_widen == _widen; | |
1609 } | |
1610 | |
1611 //------------------------------hash------------------------------------------- | |
1612 // Type-specific hashing function. | |
1613 int TypeLong::hash(void) const { | |
1614 return (int)(_lo+_hi+_widen+(int)Type::Long); | |
1615 } | |
1616 | |
1617 //------------------------------is_finite-------------------------------------- | |
1618 // Has a finite value | |
1619 bool TypeLong::is_finite() const { | |
1620 return true; | |
1621 } | |
1622 | |
1623 //------------------------------dump2------------------------------------------ | |
1624 // Dump TypeLong | |
1625 #ifndef PRODUCT | |
1626 static const char* longnamenear(jlong x, const char* xname, char* buf, jlong n) { | |
1627 if (n > x) { | |
1628 if (n >= x + 10000) return NULL; | |
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1629 sprintf(buf, "%s+" JLONG_FORMAT, xname, n - x); |
0 | 1630 } else if (n < x) { |
1631 if (n <= x - 10000) return NULL; | |
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1632 sprintf(buf, "%s-" JLONG_FORMAT, xname, x - n); |
0 | 1633 } else { |
1634 return xname; | |
1635 } | |
1636 return buf; | |
1637 } | |
1638 | |
1639 static const char* longname(char* buf, jlong n) { | |
1640 const char* str; | |
1641 if (n == min_jlong) | |
1642 return "min"; | |
1643 else if (n < min_jlong + 10000) | |
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1644 sprintf(buf, "min+" JLONG_FORMAT, n - min_jlong); |
0 | 1645 else if (n == max_jlong) |
1646 return "max"; | |
1647 else if (n > max_jlong - 10000) | |
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1648 sprintf(buf, "max-" JLONG_FORMAT, max_jlong - n); |
0 | 1649 else if ((str = longnamenear(max_juint, "maxuint", buf, n)) != NULL) |
1650 return str; | |
1651 else if ((str = longnamenear(max_jint, "maxint", buf, n)) != NULL) | |
1652 return str; | |
1653 else if ((str = longnamenear(min_jint, "minint", buf, n)) != NULL) | |
1654 return str; | |
1655 else | |
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1656 sprintf(buf, JLONG_FORMAT, n); |
0 | 1657 return buf; |
1658 } | |
1659 | |
1660 void TypeLong::dump2( Dict &d, uint depth, outputStream *st ) const { | |
1661 char buf[80], buf2[80]; | |
1662 if (_lo == min_jlong && _hi == max_jlong) | |
1663 st->print("long"); | |
1664 else if (is_con()) | |
1665 st->print("long:%s", longname(buf, get_con())); | |
1666 else if (_hi == max_jlong) | |
1667 st->print("long:>=%s", longname(buf, _lo)); | |
1668 else if (_lo == min_jlong) | |
1669 st->print("long:<=%s", longname(buf, _hi)); | |
1670 else | |
1671 st->print("long:%s..%s", longname(buf, _lo), longname(buf2, _hi)); | |
1672 | |
1673 if (_widen != 0 && this != TypeLong::LONG) | |
1674 st->print(":%.*s", _widen, "wwww"); | |
1675 } | |
1676 #endif | |
1677 | |
1678 //------------------------------singleton-------------------------------------- | |
1679 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
1680 // constants | |
1681 bool TypeLong::singleton(void) const { | |
1682 return _lo >= _hi; | |
1683 } | |
1684 | |
1685 bool TypeLong::empty(void) const { | |
1686 return _lo > _hi; | |
1687 } | |
1688 | |
1689 //============================================================================= | |
1690 // Convenience common pre-built types. | |
1691 const TypeTuple *TypeTuple::IFBOTH; // Return both arms of IF as reachable | |
1692 const TypeTuple *TypeTuple::IFFALSE; | |
1693 const TypeTuple *TypeTuple::IFTRUE; | |
1694 const TypeTuple *TypeTuple::IFNEITHER; | |
1695 const TypeTuple *TypeTuple::LOOPBODY; | |
1696 const TypeTuple *TypeTuple::MEMBAR; | |
1697 const TypeTuple *TypeTuple::STORECONDITIONAL; | |
1698 const TypeTuple *TypeTuple::START_I2C; | |
1699 const TypeTuple *TypeTuple::INT_PAIR; | |
1700 const TypeTuple *TypeTuple::LONG_PAIR; | |
12323 | 1701 const TypeTuple *TypeTuple::INT_CC_PAIR; |
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1702 const TypeTuple *TypeTuple::LONG_CC_PAIR; |
0 | 1703 |
1704 | |
1705 //------------------------------make------------------------------------------- | |
1706 // Make a TypeTuple from the range of a method signature | |
1707 const TypeTuple *TypeTuple::make_range(ciSignature* sig) { | |
1708 ciType* return_type = sig->return_type(); | |
1709 uint total_fields = TypeFunc::Parms + return_type->size(); | |
1710 const Type **field_array = fields(total_fields); | |
1711 switch (return_type->basic_type()) { | |
1712 case T_LONG: | |
1713 field_array[TypeFunc::Parms] = TypeLong::LONG; | |
1714 field_array[TypeFunc::Parms+1] = Type::HALF; | |
1715 break; | |
1716 case T_DOUBLE: | |
1717 field_array[TypeFunc::Parms] = Type::DOUBLE; | |
1718 field_array[TypeFunc::Parms+1] = Type::HALF; | |
1719 break; | |
1720 case T_OBJECT: | |
1721 case T_ARRAY: | |
1722 case T_BOOLEAN: | |
1723 case T_CHAR: | |
1724 case T_FLOAT: | |
1725 case T_BYTE: | |
1726 case T_SHORT: | |
1727 case T_INT: | |
1728 field_array[TypeFunc::Parms] = get_const_type(return_type); | |
1729 break; | |
1730 case T_VOID: | |
1731 break; | |
1732 default: | |
1733 ShouldNotReachHere(); | |
1734 } | |
1735 return (TypeTuple*)(new TypeTuple(total_fields,field_array))->hashcons(); | |
1736 } | |
1737 | |
1738 // Make a TypeTuple from the domain of a method signature | |
1739 const TypeTuple *TypeTuple::make_domain(ciInstanceKlass* recv, ciSignature* sig) { | |
1740 uint total_fields = TypeFunc::Parms + sig->size(); | |
1741 | |
1742 uint pos = TypeFunc::Parms; | |
1743 const Type **field_array; | |
1744 if (recv != NULL) { | |
1745 total_fields++; | |
1746 field_array = fields(total_fields); | |
1747 // Use get_const_type here because it respects UseUniqueSubclasses: | |
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1748 field_array[pos++] = get_const_type(recv)->join_speculative(TypePtr::NOTNULL); |
0 | 1749 } else { |
1750 field_array = fields(total_fields); | |
1751 } | |
1752 | |
1753 int i = 0; | |
1754 while (pos < total_fields) { | |
1755 ciType* type = sig->type_at(i); | |
1756 | |
1757 switch (type->basic_type()) { | |
1758 case T_LONG: | |
1759 field_array[pos++] = TypeLong::LONG; | |
1760 field_array[pos++] = Type::HALF; | |
1761 break; | |
1762 case T_DOUBLE: | |
1763 field_array[pos++] = Type::DOUBLE; | |
1764 field_array[pos++] = Type::HALF; | |
1765 break; | |
1766 case T_OBJECT: | |
1767 case T_ARRAY: | |
1768 case T_BOOLEAN: | |
1769 case T_CHAR: | |
1770 case T_FLOAT: | |
1771 case T_BYTE: | |
1772 case T_SHORT: | |
1773 case T_INT: | |
1774 field_array[pos++] = get_const_type(type); | |
1775 break; | |
1776 default: | |
1777 ShouldNotReachHere(); | |
1778 } | |
1779 i++; | |
1780 } | |
1781 return (TypeTuple*)(new TypeTuple(total_fields,field_array))->hashcons(); | |
1782 } | |
1783 | |
1784 const TypeTuple *TypeTuple::make( uint cnt, const Type **fields ) { | |
1785 return (TypeTuple*)(new TypeTuple(cnt,fields))->hashcons(); | |
1786 } | |
1787 | |
1788 //------------------------------fields----------------------------------------- | |
1789 // Subroutine call type with space allocated for argument types | |
1790 const Type **TypeTuple::fields( uint arg_cnt ) { | |
1791 const Type **flds = (const Type **)(Compile::current()->type_arena()->Amalloc_4((TypeFunc::Parms+arg_cnt)*sizeof(Type*) )); | |
1792 flds[TypeFunc::Control ] = Type::CONTROL; | |
1793 flds[TypeFunc::I_O ] = Type::ABIO; | |
1794 flds[TypeFunc::Memory ] = Type::MEMORY; | |
1795 flds[TypeFunc::FramePtr ] = TypeRawPtr::BOTTOM; | |
1796 flds[TypeFunc::ReturnAdr] = Type::RETURN_ADDRESS; | |
1797 | |
1798 return flds; | |
1799 } | |
1800 | |
1801 //------------------------------meet------------------------------------------- | |
1802 // Compute the MEET of two types. It returns a new Type object. | |
1803 const Type *TypeTuple::xmeet( const Type *t ) const { | |
1804 // Perform a fast test for common case; meeting the same types together. | |
1805 if( this == t ) return this; // Meeting same type-rep? | |
1806 | |
1807 // Current "this->_base" is Tuple | |
1808 switch (t->base()) { // switch on original type | |
1809 | |
1810 case Bottom: // Ye Olde Default | |
1811 return t; | |
1812 | |
1813 default: // All else is a mistake | |
1814 typerr(t); | |
1815 | |
1816 case Tuple: { // Meeting 2 signatures? | |
1817 const TypeTuple *x = t->is_tuple(); | |
1818 assert( _cnt == x->_cnt, "" ); | |
1819 const Type **fields = (const Type **)(Compile::current()->type_arena()->Amalloc_4( _cnt*sizeof(Type*) )); | |
1820 for( uint i=0; i<_cnt; i++ ) | |
1821 fields[i] = field_at(i)->xmeet( x->field_at(i) ); | |
1822 return TypeTuple::make(_cnt,fields); | |
1823 } | |
1824 case Top: | |
1825 break; | |
1826 } | |
1827 return this; // Return the double constant | |
1828 } | |
1829 | |
1830 //------------------------------xdual------------------------------------------ | |
1831 // Dual: compute field-by-field dual | |
1832 const Type *TypeTuple::xdual() const { | |
1833 const Type **fields = (const Type **)(Compile::current()->type_arena()->Amalloc_4( _cnt*sizeof(Type*) )); | |
1834 for( uint i=0; i<_cnt; i++ ) | |
1835 fields[i] = _fields[i]->dual(); | |
1836 return new TypeTuple(_cnt,fields); | |
1837 } | |
1838 | |
1839 //------------------------------eq--------------------------------------------- | |
1840 // Structural equality check for Type representations | |
1841 bool TypeTuple::eq( const Type *t ) const { | |
1842 const TypeTuple *s = (const TypeTuple *)t; | |
1843 if (_cnt != s->_cnt) return false; // Unequal field counts | |
1844 for (uint i = 0; i < _cnt; i++) | |
1845 if (field_at(i) != s->field_at(i)) // POINTER COMPARE! NO RECURSION! | |
1846 return false; // Missed | |
1847 return true; | |
1848 } | |
1849 | |
1850 //------------------------------hash------------------------------------------- | |
1851 // Type-specific hashing function. | |
1852 int TypeTuple::hash(void) const { | |
1853 intptr_t sum = _cnt; | |
1854 for( uint i=0; i<_cnt; i++ ) | |
1855 sum += (intptr_t)_fields[i]; // Hash on pointers directly | |
1856 return sum; | |
1857 } | |
1858 | |
1859 //------------------------------dump2------------------------------------------ | |
1860 // Dump signature Type | |
1861 #ifndef PRODUCT | |
1862 void TypeTuple::dump2( Dict &d, uint depth, outputStream *st ) const { | |
1863 st->print("{"); | |
1864 if( !depth || d[this] ) { // Check for recursive print | |
1865 st->print("...}"); | |
1866 return; | |
1867 } | |
1868 d.Insert((void*)this, (void*)this); // Stop recursion | |
1869 if( _cnt ) { | |
1870 uint i; | |
1871 for( i=0; i<_cnt-1; i++ ) { | |
1872 st->print("%d:", i); | |
1873 _fields[i]->dump2(d, depth-1, st); | |
1874 st->print(", "); | |
1875 } | |
1876 st->print("%d:", i); | |
1877 _fields[i]->dump2(d, depth-1, st); | |
1878 } | |
1879 st->print("}"); | |
1880 } | |
1881 #endif | |
1882 | |
1883 //------------------------------singleton-------------------------------------- | |
1884 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
1885 // constants (Ldi nodes). Singletons are integer, float or double constants | |
1886 // or a single symbol. | |
1887 bool TypeTuple::singleton(void) const { | |
1888 return false; // Never a singleton | |
1889 } | |
1890 | |
1891 bool TypeTuple::empty(void) const { | |
1892 for( uint i=0; i<_cnt; i++ ) { | |
1893 if (_fields[i]->empty()) return true; | |
1894 } | |
1895 return false; | |
1896 } | |
1897 | |
1898 //============================================================================= | |
1899 // Convenience common pre-built types. | |
1900 | |
1901 inline const TypeInt* normalize_array_size(const TypeInt* size) { | |
1902 // Certain normalizations keep us sane when comparing types. | |
1903 // We do not want arrayOop variables to differ only by the wideness | |
1904 // of their index types. Pick minimum wideness, since that is the | |
1905 // forced wideness of small ranges anyway. | |
1906 if (size->_widen != Type::WidenMin) | |
1907 return TypeInt::make(size->_lo, size->_hi, Type::WidenMin); | |
1908 else | |
1909 return size; | |
1910 } | |
1911 | |
1912 //------------------------------make------------------------------------------- | |
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1913 const TypeAry* TypeAry::make(const Type* elem, const TypeInt* size, bool stable) { |
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1914 if (UseCompressedOops && elem->isa_oopptr()) { |
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1915 elem = elem->make_narrowoop(); |
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1916 } |
0 | 1917 size = normalize_array_size(size); |
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1918 return (TypeAry*)(new TypeAry(elem,size,stable))->hashcons(); |
0 | 1919 } |
1920 | |
1921 //------------------------------meet------------------------------------------- | |
1922 // Compute the MEET of two types. It returns a new Type object. | |
1923 const Type *TypeAry::xmeet( const Type *t ) const { | |
1924 // Perform a fast test for common case; meeting the same types together. | |
1925 if( this == t ) return this; // Meeting same type-rep? | |
1926 | |
1927 // Current "this->_base" is Ary | |
1928 switch (t->base()) { // switch on original type | |
1929 | |
1930 case Bottom: // Ye Olde Default | |
1931 return t; | |
1932 | |
1933 default: // All else is a mistake | |
1934 typerr(t); | |
1935 | |
1936 case Array: { // Meeting 2 arrays? | |
1937 const TypeAry *a = t->is_ary(); | |
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1938 return TypeAry::make(_elem->meet_speculative(a->_elem), |
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1939 _size->xmeet(a->_size)->is_int(), |
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1940 _stable & a->_stable); |
0 | 1941 } |
1942 case Top: | |
1943 break; | |
1944 } | |
1945 return this; // Return the double constant | |
1946 } | |
1947 | |
1948 //------------------------------xdual------------------------------------------ | |
1949 // Dual: compute field-by-field dual | |
1950 const Type *TypeAry::xdual() const { | |
1951 const TypeInt* size_dual = _size->dual()->is_int(); | |
1952 size_dual = normalize_array_size(size_dual); | |
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1953 return new TypeAry(_elem->dual(), size_dual, !_stable); |
0 | 1954 } |
1955 | |
1956 //------------------------------eq--------------------------------------------- | |
1957 // Structural equality check for Type representations | |
1958 bool TypeAry::eq( const Type *t ) const { | |
1959 const TypeAry *a = (const TypeAry*)t; | |
1960 return _elem == a->_elem && | |
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1961 _stable == a->_stable && |
0 | 1962 _size == a->_size; |
1963 } | |
1964 | |
1965 //------------------------------hash------------------------------------------- | |
1966 // Type-specific hashing function. | |
1967 int TypeAry::hash(void) const { | |
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1968 return (intptr_t)_elem + (intptr_t)_size + (_stable ? 43 : 0); |
0 | 1969 } |
1970 | |
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1971 /** |
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1972 * Return same type without a speculative part in the element |
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1973 */ |
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1974 const Type* TypeAry::remove_speculative() const { |
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1975 return make(_elem->remove_speculative(), _size, _stable); |
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1976 } |
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1977 |
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1978 //----------------------interface_vs_oop--------------------------------------- |
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1979 #ifdef ASSERT |
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1980 bool TypeAry::interface_vs_oop(const Type *t) const { |
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1981 const TypeAry* t_ary = t->is_ary(); |
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1982 if (t_ary) { |
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1983 return _elem->interface_vs_oop(t_ary->_elem); |
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1984 } |
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1985 return false; |
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1986 } |
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1987 #endif |
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1988 |
0 | 1989 //------------------------------dump2------------------------------------------ |
1990 #ifndef PRODUCT | |
1991 void TypeAry::dump2( Dict &d, uint depth, outputStream *st ) const { | |
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1992 if (_stable) st->print("stable:"); |
0 | 1993 _elem->dump2(d, depth, st); |
1994 st->print("["); | |
1995 _size->dump2(d, depth, st); | |
1996 st->print("]"); | |
1997 } | |
1998 #endif | |
1999 | |
2000 //------------------------------singleton-------------------------------------- | |
2001 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
2002 // constants (Ldi nodes). Singletons are integer, float or double constants | |
2003 // or a single symbol. | |
2004 bool TypeAry::singleton(void) const { | |
2005 return false; // Never a singleton | |
2006 } | |
2007 | |
2008 bool TypeAry::empty(void) const { | |
2009 return _elem->empty() || _size->empty(); | |
2010 } | |
2011 | |
2012 //--------------------------ary_must_be_exact---------------------------------- | |
2013 bool TypeAry::ary_must_be_exact() const { | |
2014 if (!UseExactTypes) return false; | |
2015 // This logic looks at the element type of an array, and returns true | |
2016 // if the element type is either a primitive or a final instance class. | |
2017 // In such cases, an array built on this ary must have no subclasses. | |
2018 if (_elem == BOTTOM) return false; // general array not exact | |
2019 if (_elem == TOP ) return false; // inverted general array not exact | |
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2020 const TypeOopPtr* toop = NULL; |
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2021 if (UseCompressedOops && _elem->isa_narrowoop()) { |
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2022 toop = _elem->make_ptr()->isa_oopptr(); |
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2023 } else { |
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2024 toop = _elem->isa_oopptr(); |
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2025 } |
0 | 2026 if (!toop) return true; // a primitive type, like int |
2027 ciKlass* tklass = toop->klass(); | |
2028 if (tklass == NULL) return false; // unloaded class | |
2029 if (!tklass->is_loaded()) return false; // unloaded class | |
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2030 const TypeInstPtr* tinst; |
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2031 if (_elem->isa_narrowoop()) |
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2032 tinst = _elem->make_ptr()->isa_instptr(); |
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2033 else |
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2034 tinst = _elem->isa_instptr(); |
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2035 if (tinst) |
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2036 return tklass->as_instance_klass()->is_final(); |
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2037 const TypeAryPtr* tap; |
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2038 if (_elem->isa_narrowoop()) |
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2039 tap = _elem->make_ptr()->isa_aryptr(); |
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2040 else |
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2041 tap = _elem->isa_aryptr(); |
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2042 if (tap) |
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2043 return tap->ary()->ary_must_be_exact(); |
0 | 2044 return false; |
2045 } | |
2046 | |
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2047 //==============================TypeVect======================================= |
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2048 // Convenience common pre-built types. |
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2049 const TypeVect *TypeVect::VECTS = NULL; // 32-bit vectors |
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2050 const TypeVect *TypeVect::VECTD = NULL; // 64-bit vectors |
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2051 const TypeVect *TypeVect::VECTX = NULL; // 128-bit vectors |
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2052 const TypeVect *TypeVect::VECTY = NULL; // 256-bit vectors |
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2053 |
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2054 //------------------------------make------------------------------------------- |
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2055 const TypeVect* TypeVect::make(const Type *elem, uint length) { |
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2056 BasicType elem_bt = elem->array_element_basic_type(); |
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2057 assert(is_java_primitive(elem_bt), "only primitive types in vector"); |
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2058 assert(length > 1 && is_power_of_2(length), "vector length is power of 2"); |
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2059 assert(Matcher::vector_size_supported(elem_bt, length), "length in range"); |
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2060 int size = length * type2aelembytes(elem_bt); |
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2061 switch (Matcher::vector_ideal_reg(size)) { |
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2062 case Op_VecS: |
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2063 return (TypeVect*)(new TypeVectS(elem, length))->hashcons(); |
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2064 case Op_RegL: |
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2065 case Op_VecD: |
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2066 case Op_RegD: |
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2067 return (TypeVect*)(new TypeVectD(elem, length))->hashcons(); |
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2068 case Op_VecX: |
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2069 return (TypeVect*)(new TypeVectX(elem, length))->hashcons(); |
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2070 case Op_VecY: |
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2071 return (TypeVect*)(new TypeVectY(elem, length))->hashcons(); |
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2072 } |
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2073 ShouldNotReachHere(); |
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2074 return NULL; |
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2075 } |
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2076 |
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2077 //------------------------------meet------------------------------------------- |
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2078 // Compute the MEET of two types. It returns a new Type object. |
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2079 const Type *TypeVect::xmeet( const Type *t ) const { |
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2080 // Perform a fast test for common case; meeting the same types together. |
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2081 if( this == t ) return this; // Meeting same type-rep? |
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2082 |
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2083 // Current "this->_base" is Vector |
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2084 switch (t->base()) { // switch on original type |
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2085 |
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2086 case Bottom: // Ye Olde Default |
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2087 return t; |
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2088 |
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2089 default: // All else is a mistake |
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2090 typerr(t); |
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2091 |
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2092 case VectorS: |
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2093 case VectorD: |
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2094 case VectorX: |
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2095 case VectorY: { // Meeting 2 vectors? |
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2096 const TypeVect* v = t->is_vect(); |
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2097 assert( base() == v->base(), ""); |
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2098 assert(length() == v->length(), ""); |
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2099 assert(element_basic_type() == v->element_basic_type(), ""); |
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2100 return TypeVect::make(_elem->xmeet(v->_elem), _length); |
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2101 } |
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2102 case Top: |
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2103 break; |
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2104 } |
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2105 return this; |
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2106 } |
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2107 |
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2108 //------------------------------xdual------------------------------------------ |
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2109 // Dual: compute field-by-field dual |
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2110 const Type *TypeVect::xdual() const { |
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2111 return new TypeVect(base(), _elem->dual(), _length); |
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2112 } |
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2113 |
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2114 //------------------------------eq--------------------------------------------- |
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2115 // Structural equality check for Type representations |
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2116 bool TypeVect::eq(const Type *t) const { |
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2117 const TypeVect *v = t->is_vect(); |
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2118 return (_elem == v->_elem) && (_length == v->_length); |
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2119 } |
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2120 |
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2121 //------------------------------hash------------------------------------------- |
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2122 // Type-specific hashing function. |
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2123 int TypeVect::hash(void) const { |
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2124 return (intptr_t)_elem + (intptr_t)_length; |
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2125 } |
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2126 |
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2127 //------------------------------singleton-------------------------------------- |
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2128 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple |
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2129 // constants (Ldi nodes). Vector is singleton if all elements are the same |
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2130 // constant value (when vector is created with Replicate code). |
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2131 bool TypeVect::singleton(void) const { |
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2132 // There is no Con node for vectors yet. |
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2133 // return _elem->singleton(); |
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2134 return false; |
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2135 } |
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2136 |
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2137 bool TypeVect::empty(void) const { |
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2138 return _elem->empty(); |
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2139 } |
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2140 |
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2141 //------------------------------dump2------------------------------------------ |
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2142 #ifndef PRODUCT |
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2143 void TypeVect::dump2(Dict &d, uint depth, outputStream *st) const { |
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2144 switch (base()) { |
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2145 case VectorS: |
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2146 st->print("vectors["); break; |
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2147 case VectorD: |
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2148 st->print("vectord["); break; |
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2149 case VectorX: |
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2150 st->print("vectorx["); break; |
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2151 case VectorY: |
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2152 st->print("vectory["); break; |
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2153 default: |
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2154 ShouldNotReachHere(); |
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2155 } |
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2156 st->print("%d]:{", _length); |
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2157 _elem->dump2(d, depth, st); |
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2158 st->print("}"); |
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2159 } |
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2160 #endif |
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2161 |
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2162 |
0 | 2163 //============================================================================= |
2164 // Convenience common pre-built types. | |
2165 const TypePtr *TypePtr::NULL_PTR; | |
2166 const TypePtr *TypePtr::NOTNULL; | |
2167 const TypePtr *TypePtr::BOTTOM; | |
2168 | |
2169 //------------------------------meet------------------------------------------- | |
2170 // Meet over the PTR enum | |
2171 const TypePtr::PTR TypePtr::ptr_meet[TypePtr::lastPTR][TypePtr::lastPTR] = { | |
2172 // TopPTR, AnyNull, Constant, Null, NotNull, BotPTR, | |
2173 { /* Top */ TopPTR, AnyNull, Constant, Null, NotNull, BotPTR,}, | |
2174 { /* AnyNull */ AnyNull, AnyNull, Constant, BotPTR, NotNull, BotPTR,}, | |
2175 { /* Constant*/ Constant, Constant, Constant, BotPTR, NotNull, BotPTR,}, | |
2176 { /* Null */ Null, BotPTR, BotPTR, Null, BotPTR, BotPTR,}, | |
2177 { /* NotNull */ NotNull, NotNull, NotNull, BotPTR, NotNull, BotPTR,}, | |
2178 { /* BotPTR */ BotPTR, BotPTR, BotPTR, BotPTR, BotPTR, BotPTR,} | |
2179 }; | |
2180 | |
2181 //------------------------------make------------------------------------------- | |
2182 const TypePtr *TypePtr::make( TYPES t, enum PTR ptr, int offset ) { | |
2183 return (TypePtr*)(new TypePtr(t,ptr,offset))->hashcons(); | |
2184 } | |
2185 | |
2186 //------------------------------cast_to_ptr_type------------------------------- | |
2187 const Type *TypePtr::cast_to_ptr_type(PTR ptr) const { | |
2188 assert(_base == AnyPtr, "subclass must override cast_to_ptr_type"); | |
2189 if( ptr == _ptr ) return this; | |
2190 return make(_base, ptr, _offset); | |
2191 } | |
2192 | |
2193 //------------------------------get_con---------------------------------------- | |
2194 intptr_t TypePtr::get_con() const { | |
2195 assert( _ptr == Null, "" ); | |
2196 return _offset; | |
2197 } | |
2198 | |
2199 //------------------------------meet------------------------------------------- | |
2200 // Compute the MEET of two types. It returns a new Type object. | |
2201 const Type *TypePtr::xmeet( const Type *t ) const { | |
2202 // Perform a fast test for common case; meeting the same types together. | |
2203 if( this == t ) return this; // Meeting same type-rep? | |
2204 | |
2205 // Current "this->_base" is AnyPtr | |
2206 switch (t->base()) { // switch on original type | |
2207 case Int: // Mixing ints & oops happens when javac | |
2208 case Long: // reuses local variables | |
2209 case FloatTop: | |
2210 case FloatCon: | |
2211 case FloatBot: | |
2212 case DoubleTop: | |
2213 case DoubleCon: | |
2214 case DoubleBot: | |
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2215 case NarrowOop: |
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2216 case NarrowKlass: |
0 | 2217 case Bottom: // Ye Olde Default |
2218 return Type::BOTTOM; | |
2219 case Top: | |
2220 return this; | |
2221 | |
2222 case AnyPtr: { // Meeting to AnyPtrs | |
2223 const TypePtr *tp = t->is_ptr(); | |
2224 return make( AnyPtr, meet_ptr(tp->ptr()), meet_offset(tp->offset()) ); | |
2225 } | |
2226 case RawPtr: // For these, flip the call around to cut down | |
2227 case OopPtr: | |
2228 case InstPtr: // on the cases I have to handle. | |
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2229 case AryPtr: |
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2230 case MetadataPtr: |
0 | 2231 case KlassPtr: |
2232 return t->xmeet(this); // Call in reverse direction | |
2233 default: // All else is a mistake | |
2234 typerr(t); | |
2235 | |
2236 } | |
2237 return this; | |
2238 } | |
2239 | |
2240 //------------------------------meet_offset------------------------------------ | |
2241 int TypePtr::meet_offset( int offset ) const { | |
2242 // Either is 'TOP' offset? Return the other offset! | |
2243 if( _offset == OffsetTop ) return offset; | |
2244 if( offset == OffsetTop ) return _offset; | |
2245 // If either is different, return 'BOTTOM' offset | |
2246 if( _offset != offset ) return OffsetBot; | |
2247 return _offset; | |
2248 } | |
2249 | |
2250 //------------------------------dual_offset------------------------------------ | |
2251 int TypePtr::dual_offset( ) const { | |
2252 if( _offset == OffsetTop ) return OffsetBot;// Map 'TOP' into 'BOTTOM' | |
2253 if( _offset == OffsetBot ) return OffsetTop;// Map 'BOTTOM' into 'TOP' | |
2254 return _offset; // Map everything else into self | |
2255 } | |
2256 | |
2257 //------------------------------xdual------------------------------------------ | |
2258 // Dual: compute field-by-field dual | |
2259 const TypePtr::PTR TypePtr::ptr_dual[TypePtr::lastPTR] = { | |
2260 BotPTR, NotNull, Constant, Null, AnyNull, TopPTR | |
2261 }; | |
2262 const Type *TypePtr::xdual() const { | |
2263 return new TypePtr( AnyPtr, dual_ptr(), dual_offset() ); | |
2264 } | |
2265 | |
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2266 //------------------------------xadd_offset------------------------------------ |
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2267 int TypePtr::xadd_offset( intptr_t offset ) const { |
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2268 // Adding to 'TOP' offset? Return 'TOP'! |
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2269 if( _offset == OffsetTop || offset == OffsetTop ) return OffsetTop; |
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2270 // Adding to 'BOTTOM' offset? Return 'BOTTOM'! |
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2271 if( _offset == OffsetBot || offset == OffsetBot ) return OffsetBot; |
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2272 // Addition overflows or "accidentally" equals to OffsetTop? Return 'BOTTOM'! |
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2273 offset += (intptr_t)_offset; |
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2274 if (offset != (int)offset || offset == OffsetTop) return OffsetBot; |
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2275 |
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2276 // assert( _offset >= 0 && _offset+offset >= 0, "" ); |
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2277 // It is possible to construct a negative offset during PhaseCCP |
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2278 |
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2279 return (int)offset; // Sum valid offsets |
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2280 } |
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2281 |
0 | 2282 //------------------------------add_offset------------------------------------- |
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2283 const TypePtr *TypePtr::add_offset( intptr_t offset ) const { |
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2284 return make( AnyPtr, _ptr, xadd_offset(offset) ); |
0 | 2285 } |
2286 | |
2287 //------------------------------eq--------------------------------------------- | |
2288 // Structural equality check for Type representations | |
2289 bool TypePtr::eq( const Type *t ) const { | |
2290 const TypePtr *a = (const TypePtr*)t; | |
2291 return _ptr == a->ptr() && _offset == a->offset(); | |
2292 } | |
2293 | |
2294 //------------------------------hash------------------------------------------- | |
2295 // Type-specific hashing function. | |
2296 int TypePtr::hash(void) const { | |
2297 return _ptr + _offset; | |
2298 } | |
2299 | |
2300 //------------------------------dump2------------------------------------------ | |
2301 const char *const TypePtr::ptr_msg[TypePtr::lastPTR] = { | |
2302 "TopPTR","AnyNull","Constant","NULL","NotNull","BotPTR" | |
2303 }; | |
2304 | |
2305 #ifndef PRODUCT | |
2306 void TypePtr::dump2( Dict &d, uint depth, outputStream *st ) const { | |
2307 if( _ptr == Null ) st->print("NULL"); | |
2308 else st->print("%s *", ptr_msg[_ptr]); | |
2309 if( _offset == OffsetTop ) st->print("+top"); | |
2310 else if( _offset == OffsetBot ) st->print("+bot"); | |
2311 else if( _offset ) st->print("+%d", _offset); | |
2312 } | |
2313 #endif | |
2314 | |
2315 //------------------------------singleton-------------------------------------- | |
2316 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
2317 // constants | |
2318 bool TypePtr::singleton(void) const { | |
2319 // TopPTR, Null, AnyNull, Constant are all singletons | |
2320 return (_offset != OffsetBot) && !below_centerline(_ptr); | |
2321 } | |
2322 | |
2323 bool TypePtr::empty(void) const { | |
2324 return (_offset == OffsetTop) || above_centerline(_ptr); | |
2325 } | |
2326 | |
2327 //============================================================================= | |
2328 // Convenience common pre-built types. | |
2329 const TypeRawPtr *TypeRawPtr::BOTTOM; | |
2330 const TypeRawPtr *TypeRawPtr::NOTNULL; | |
2331 | |
2332 //------------------------------make------------------------------------------- | |
2333 const TypeRawPtr *TypeRawPtr::make( enum PTR ptr ) { | |
2334 assert( ptr != Constant, "what is the constant?" ); | |
2335 assert( ptr != Null, "Use TypePtr for NULL" ); | |
2336 return (TypeRawPtr*)(new TypeRawPtr(ptr,0))->hashcons(); | |
2337 } | |
2338 | |
2339 const TypeRawPtr *TypeRawPtr::make( address bits ) { | |
2340 assert( bits, "Use TypePtr for NULL" ); | |
2341 return (TypeRawPtr*)(new TypeRawPtr(Constant,bits))->hashcons(); | |
2342 } | |
2343 | |
2344 //------------------------------cast_to_ptr_type------------------------------- | |
2345 const Type *TypeRawPtr::cast_to_ptr_type(PTR ptr) const { | |
2346 assert( ptr != Constant, "what is the constant?" ); | |
2347 assert( ptr != Null, "Use TypePtr for NULL" ); | |
2348 assert( _bits==0, "Why cast a constant address?"); | |
2349 if( ptr == _ptr ) return this; | |
2350 return make(ptr); | |
2351 } | |
2352 | |
2353 //------------------------------get_con---------------------------------------- | |
2354 intptr_t TypeRawPtr::get_con() const { | |
2355 assert( _ptr == Null || _ptr == Constant, "" ); | |
2356 return (intptr_t)_bits; | |
2357 } | |
2358 | |
2359 //------------------------------meet------------------------------------------- | |
2360 // Compute the MEET of two types. It returns a new Type object. | |
2361 const Type *TypeRawPtr::xmeet( const Type *t ) const { | |
2362 // Perform a fast test for common case; meeting the same types together. | |
2363 if( this == t ) return this; // Meeting same type-rep? | |
2364 | |
2365 // Current "this->_base" is RawPtr | |
2366 switch( t->base() ) { // switch on original type | |
2367 case Bottom: // Ye Olde Default | |
2368 return t; | |
2369 case Top: | |
2370 return this; | |
2371 case AnyPtr: // Meeting to AnyPtrs | |
2372 break; | |
2373 case RawPtr: { // might be top, bot, any/not or constant | |
2374 enum PTR tptr = t->is_ptr()->ptr(); | |
2375 enum PTR ptr = meet_ptr( tptr ); | |
2376 if( ptr == Constant ) { // Cannot be equal constants, so... | |
2377 if( tptr == Constant && _ptr != Constant) return t; | |
2378 if( _ptr == Constant && tptr != Constant) return this; | |
2379 ptr = NotNull; // Fall down in lattice | |
2380 } | |
2381 return make( ptr ); | |
2382 } | |
2383 | |
2384 case OopPtr: | |
2385 case InstPtr: | |
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2386 case AryPtr: |
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2387 case MetadataPtr: |
0 | 2388 case KlassPtr: |
2389 return TypePtr::BOTTOM; // Oop meet raw is not well defined | |
2390 default: // All else is a mistake | |
2391 typerr(t); | |
2392 } | |
2393 | |
2394 // Found an AnyPtr type vs self-RawPtr type | |
2395 const TypePtr *tp = t->is_ptr(); | |
2396 switch (tp->ptr()) { | |
2397 case TypePtr::TopPTR: return this; | |
2398 case TypePtr::BotPTR: return t; | |
2399 case TypePtr::Null: | |
2400 if( _ptr == TypePtr::TopPTR ) return t; | |
2401 return TypeRawPtr::BOTTOM; | |
2402 case TypePtr::NotNull: return TypePtr::make( AnyPtr, meet_ptr(TypePtr::NotNull), tp->meet_offset(0) ); | |
2403 case TypePtr::AnyNull: | |
2404 if( _ptr == TypePtr::Constant) return this; | |
2405 return make( meet_ptr(TypePtr::AnyNull) ); | |
2406 default: ShouldNotReachHere(); | |
2407 } | |
2408 return this; | |
2409 } | |
2410 | |
2411 //------------------------------xdual------------------------------------------ | |
2412 // Dual: compute field-by-field dual | |
2413 const Type *TypeRawPtr::xdual() const { | |
2414 return new TypeRawPtr( dual_ptr(), _bits ); | |
2415 } | |
2416 | |
2417 //------------------------------add_offset------------------------------------- | |
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2418 const TypePtr *TypeRawPtr::add_offset( intptr_t offset ) const { |
0 | 2419 if( offset == OffsetTop ) return BOTTOM; // Undefined offset-> undefined pointer |
2420 if( offset == OffsetBot ) return BOTTOM; // Unknown offset-> unknown pointer | |
2421 if( offset == 0 ) return this; // No change | |
2422 switch (_ptr) { | |
2423 case TypePtr::TopPTR: | |
2424 case TypePtr::BotPTR: | |
2425 case TypePtr::NotNull: | |
2426 return this; | |
2427 case TypePtr::Null: | |
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2428 case TypePtr::Constant: { |
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|
2429 address bits = _bits+offset; |
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2430 if ( bits == 0 ) return TypePtr::NULL_PTR; |
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2431 return make( bits ); |
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|
2432 } |
0 | 2433 default: ShouldNotReachHere(); |
2434 } | |
2435 return NULL; // Lint noise | |
2436 } | |
2437 | |
2438 //------------------------------eq--------------------------------------------- | |
2439 // Structural equality check for Type representations | |
2440 bool TypeRawPtr::eq( const Type *t ) const { | |
2441 const TypeRawPtr *a = (const TypeRawPtr*)t; | |
2442 return _bits == a->_bits && TypePtr::eq(t); | |
2443 } | |
2444 | |
2445 //------------------------------hash------------------------------------------- | |
2446 // Type-specific hashing function. | |
2447 int TypeRawPtr::hash(void) const { | |
2448 return (intptr_t)_bits + TypePtr::hash(); | |
2449 } | |
2450 | |
2451 //------------------------------dump2------------------------------------------ | |
2452 #ifndef PRODUCT | |
2453 void TypeRawPtr::dump2( Dict &d, uint depth, outputStream *st ) const { | |
2454 if( _ptr == Constant ) | |
2455 st->print(INTPTR_FORMAT, _bits); | |
2456 else | |
2457 st->print("rawptr:%s", ptr_msg[_ptr]); | |
2458 } | |
2459 #endif | |
2460 | |
2461 //============================================================================= | |
2462 // Convenience common pre-built type. | |
2463 const TypeOopPtr *TypeOopPtr::BOTTOM; | |
2464 | |
163 | 2465 //------------------------------TypeOopPtr------------------------------------- |
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2466 TypeOopPtr::TypeOopPtr(TYPES t, PTR ptr, ciKlass* k, bool xk, ciObject* o, int offset, int instance_id, const TypeOopPtr* speculative, int inline_depth) |
163 | 2467 : TypePtr(t, ptr, offset), |
2468 _const_oop(o), _klass(k), | |
2469 _klass_is_exact(xk), | |
2470 _is_ptr_to_narrowoop(false), | |
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2471 _is_ptr_to_narrowklass(false), |
10278 | 2472 _is_ptr_to_boxed_value(false), |
12966 | 2473 _instance_id(instance_id), |
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2474 _speculative(speculative), |
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2475 _inline_depth(inline_depth){ |
10278 | 2476 if (Compile::current()->eliminate_boxing() && (t == InstPtr) && |
2477 (offset > 0) && xk && (k != 0) && k->is_instance_klass()) { | |
2478 _is_ptr_to_boxed_value = k->as_instance_klass()->is_boxed_value_offset(offset); | |
2479 } | |
163 | 2480 #ifdef _LP64 |
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2481 if (_offset != 0) { |
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2482 if (_offset == oopDesc::klass_offset_in_bytes()) { |
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2483 _is_ptr_to_narrowklass = UseCompressedClassPointers; |
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2484 } else if (klass() == NULL) { |
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2485 // Array with unknown body type |
163 | 2486 assert(this->isa_aryptr(), "only arrays without klass"); |
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2487 _is_ptr_to_narrowoop = UseCompressedOops; |
163 | 2488 } else if (this->isa_aryptr()) { |
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2489 _is_ptr_to_narrowoop = (UseCompressedOops && klass()->is_obj_array_klass() && |
163 | 2490 _offset != arrayOopDesc::length_offset_in_bytes()); |
2491 } else if (klass()->is_instance_klass()) { | |
2492 ciInstanceKlass* ik = klass()->as_instance_klass(); | |
2493 ciField* field = NULL; | |
2494 if (this->isa_klassptr()) { | |
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2495 // Perm objects don't use compressed references |
163 | 2496 } else if (_offset == OffsetBot || _offset == OffsetTop) { |
2497 // unsafe access | |
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2498 _is_ptr_to_narrowoop = UseCompressedOops; |
163 | 2499 } else { // exclude unsafe ops |
2500 assert(this->isa_instptr(), "must be an instance ptr."); | |
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2501 |
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2502 if (klass() == ciEnv::current()->Class_klass() && |
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2503 (_offset == java_lang_Class::klass_offset_in_bytes() || |
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2504 _offset == java_lang_Class::array_klass_offset_in_bytes())) { |
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2505 // Special hidden fields from the Class. |
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2506 assert(this->isa_instptr(), "must be an instance ptr."); |
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2507 _is_ptr_to_narrowoop = false; |
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2508 } else if (klass() == ciEnv::current()->Class_klass() && |
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2509 _offset >= InstanceMirrorKlass::offset_of_static_fields()) { |
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2510 // Static fields |
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2511 assert(o != NULL, "must be constant"); |
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2512 ciInstanceKlass* k = o->as_instance()->java_lang_Class_klass()->as_instance_klass(); |
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2513 ciField* field = k->get_field_by_offset(_offset, true); |
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2514 assert(field != NULL, "missing field"); |
163 | 2515 BasicType basic_elem_type = field->layout_type(); |
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2516 _is_ptr_to_narrowoop = UseCompressedOops && (basic_elem_type == T_OBJECT || |
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2517 basic_elem_type == T_ARRAY); |
163 | 2518 } else { |
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2519 // Instance fields which contains a compressed oop references. |
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2520 field = ik->get_field_by_offset(_offset, false); |
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2521 if (field != NULL) { |
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2522 BasicType basic_elem_type = field->layout_type(); |
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2523 _is_ptr_to_narrowoop = UseCompressedOops && (basic_elem_type == T_OBJECT || |
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2524 basic_elem_type == T_ARRAY); |
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2525 } else if (klass()->equals(ciEnv::current()->Object_klass())) { |
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2526 // Compile::find_alias_type() cast exactness on all types to verify |
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2527 // that it does not affect alias type. |
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2528 _is_ptr_to_narrowoop = UseCompressedOops; |
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2529 } else { |
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2530 // Type for the copy start in LibraryCallKit::inline_native_clone(). |
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2531 _is_ptr_to_narrowoop = UseCompressedOops; |
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2532 } |
163 | 2533 } |
2534 } | |
2535 } | |
2536 } | |
2537 #endif | |
2538 } | |
2539 | |
0 | 2540 //------------------------------make------------------------------------------- |
2541 const TypeOopPtr *TypeOopPtr::make(PTR ptr, | |
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2542 int offset, int instance_id, const TypeOopPtr* speculative, int inline_depth) { |
0 | 2543 assert(ptr != Constant, "no constant generic pointers"); |
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2544 ciKlass* k = Compile::current()->env()->Object_klass(); |
0 | 2545 bool xk = false; |
2546 ciObject* o = NULL; | |
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2547 return (TypeOopPtr*)(new TypeOopPtr(OopPtr, ptr, k, xk, o, offset, instance_id, speculative, inline_depth))->hashcons(); |
0 | 2548 } |
2549 | |
2550 | |
2551 //------------------------------cast_to_ptr_type------------------------------- | |
2552 const Type *TypeOopPtr::cast_to_ptr_type(PTR ptr) const { | |
2553 assert(_base == OopPtr, "subclass must override cast_to_ptr_type"); | |
2554 if( ptr == _ptr ) return this; | |
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2555 return make(ptr, _offset, _instance_id, _speculative, _inline_depth); |
0 | 2556 } |
2557 | |
247 | 2558 //-----------------------------cast_to_instance_id---------------------------- |
223 | 2559 const TypeOopPtr *TypeOopPtr::cast_to_instance_id(int instance_id) const { |
0 | 2560 // There are no instances of a general oop. |
2561 // Return self unchanged. | |
2562 return this; | |
2563 } | |
2564 | |
2565 //-----------------------------cast_to_exactness------------------------------- | |
2566 const Type *TypeOopPtr::cast_to_exactness(bool klass_is_exact) const { | |
2567 // There is no such thing as an exact general oop. | |
2568 // Return self unchanged. | |
2569 return this; | |
2570 } | |
2571 | |
2572 | |
2573 //------------------------------as_klass_type---------------------------------- | |
2574 // Return the klass type corresponding to this instance or array type. | |
2575 // It is the type that is loaded from an object of this type. | |
2576 const TypeKlassPtr* TypeOopPtr::as_klass_type() const { | |
2577 ciKlass* k = klass(); | |
2578 bool xk = klass_is_exact(); | |
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2579 if (k == NULL) |
0 | 2580 return TypeKlassPtr::OBJECT; |
2581 else | |
2582 return TypeKlassPtr::make(xk? Constant: NotNull, k, 0); | |
2583 } | |
2584 | |
12966 | 2585 const Type *TypeOopPtr::xmeet(const Type *t) const { |
2586 const Type* res = xmeet_helper(t); | |
2587 if (res->isa_oopptr() == NULL) { | |
2588 return res; | |
2589 } | |
2590 | |
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2591 const TypeOopPtr* res_oopptr = res->is_oopptr(); |
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2592 if (res_oopptr->speculative() != NULL) { |
12966 | 2593 // type->speculative() == NULL means that speculation is no better |
2594 // than type, i.e. type->speculative() == type. So there are 2 | |
2595 // ways to represent the fact that we have no useful speculative | |
2596 // data and we should use a single one to be able to test for | |
2597 // equality between types. Check whether type->speculative() == | |
2598 // type and set speculative to NULL if it is the case. | |
2599 if (res_oopptr->remove_speculative() == res_oopptr->speculative()) { | |
2600 return res_oopptr->remove_speculative(); | |
2601 } | |
2602 } | |
2603 | |
2604 return res; | |
2605 } | |
0 | 2606 |
2607 //------------------------------meet------------------------------------------- | |
2608 // Compute the MEET of two types. It returns a new Type object. | |
12966 | 2609 const Type *TypeOopPtr::xmeet_helper(const Type *t) const { |
0 | 2610 // Perform a fast test for common case; meeting the same types together. |
2611 if( this == t ) return this; // Meeting same type-rep? | |
2612 | |
2613 // Current "this->_base" is OopPtr | |
2614 switch (t->base()) { // switch on original type | |
2615 | |
2616 case Int: // Mixing ints & oops happens when javac | |
2617 case Long: // reuses local variables | |
2618 case FloatTop: | |
2619 case FloatCon: | |
2620 case FloatBot: | |
2621 case DoubleTop: | |
2622 case DoubleCon: | |
2623 case DoubleBot: | |
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2624 case NarrowOop: |
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2625 case NarrowKlass: |
0 | 2626 case Bottom: // Ye Olde Default |
2627 return Type::BOTTOM; | |
2628 case Top: | |
2629 return this; | |
2630 | |
2631 default: // All else is a mistake | |
2632 typerr(t); | |
2633 | |
2634 case RawPtr: | |
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2635 case MetadataPtr: |
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2636 case KlassPtr: |
0 | 2637 return TypePtr::BOTTOM; // Oop meet raw is not well defined |
2638 | |
2639 case AnyPtr: { | |
2640 // Found an AnyPtr type vs self-OopPtr type | |
2641 const TypePtr *tp = t->is_ptr(); | |
2642 int offset = meet_offset(tp->offset()); | |
2643 PTR ptr = meet_ptr(tp->ptr()); | |
2644 switch (tp->ptr()) { | |
2645 case Null: | |
2646 if (ptr == Null) return TypePtr::make(AnyPtr, ptr, offset); | |
2647 // else fall through: | |
2648 case TopPTR: | |
992 | 2649 case AnyNull: { |
2650 int instance_id = meet_instance_id(InstanceTop); | |
12966 | 2651 const TypeOopPtr* speculative = _speculative; |
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2652 return make(ptr, offset, instance_id, speculative, _inline_depth); |
992 | 2653 } |
0 | 2654 case BotPTR: |
2655 case NotNull: | |
2656 return TypePtr::make(AnyPtr, ptr, offset); | |
2657 default: typerr(t); | |
2658 } | |
2659 } | |
2660 | |
2661 case OopPtr: { // Meeting to other OopPtrs | |
2662 const TypeOopPtr *tp = t->is_oopptr(); | |
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2663 int instance_id = meet_instance_id(tp->instance_id()); |
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2664 const TypeOopPtr* speculative = xmeet_speculative(tp); |
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2665 int depth = meet_inline_depth(tp->inline_depth()); |
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2666 return make(meet_ptr(tp->ptr()), meet_offset(tp->offset()), instance_id, speculative, depth); |
0 | 2667 } |
2668 | |
2669 case InstPtr: // For these, flip the call around to cut down | |
2670 case AryPtr: | |
2671 return t->xmeet(this); // Call in reverse direction | |
2672 | |
2673 } // End of switch | |
2674 return this; // Return the double constant | |
2675 } | |
2676 | |
2677 | |
2678 //------------------------------xdual------------------------------------------ | |
2679 // Dual of a pure heap pointer. No relevant klass or oop information. | |
2680 const Type *TypeOopPtr::xdual() const { | |
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2681 assert(klass() == Compile::current()->env()->Object_klass(), "no klasses here"); |
0 | 2682 assert(const_oop() == NULL, "no constants here"); |
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2683 return new TypeOopPtr(_base, dual_ptr(), klass(), klass_is_exact(), const_oop(), dual_offset(), dual_instance_id(), dual_speculative(), dual_inline_depth()); |
0 | 2684 } |
2685 | |
2686 //--------------------------make_from_klass_common----------------------------- | |
2687 // Computes the element-type given a klass. | |
2688 const TypeOopPtr* TypeOopPtr::make_from_klass_common(ciKlass *klass, bool klass_change, bool try_for_exact) { | |
2689 if (klass->is_instance_klass()) { | |
2690 Compile* C = Compile::current(); | |
2691 Dependencies* deps = C->dependencies(); | |
2692 assert((deps != NULL) == (C->method() != NULL && C->method()->code_size() > 0), "sanity"); | |
2693 // Element is an instance | |
2694 bool klass_is_exact = false; | |
2695 if (klass->is_loaded()) { | |
2696 // Try to set klass_is_exact. | |
2697 ciInstanceKlass* ik = klass->as_instance_klass(); | |
2698 klass_is_exact = ik->is_final(); | |
2699 if (!klass_is_exact && klass_change | |
2700 && deps != NULL && UseUniqueSubclasses) { | |
2701 ciInstanceKlass* sub = ik->unique_concrete_subklass(); | |
2702 if (sub != NULL) { | |
2703 deps->assert_abstract_with_unique_concrete_subtype(ik, sub); | |
2704 klass = ik = sub; | |
2705 klass_is_exact = sub->is_final(); | |
2706 } | |
2707 } | |
2708 if (!klass_is_exact && try_for_exact | |
2709 && deps != NULL && UseExactTypes) { | |
2710 if (!ik->is_interface() && !ik->has_subklass()) { | |
2711 // Add a dependence; if concrete subclass added we need to recompile | |
2712 deps->assert_leaf_type(ik); | |
2713 klass_is_exact = true; | |
2714 } | |
2715 } | |
2716 } | |
2717 return TypeInstPtr::make(TypePtr::BotPTR, klass, klass_is_exact, NULL, 0); | |
2718 } else if (klass->is_obj_array_klass()) { | |
2719 // Element is an object array. Recursively call ourself. | |
2720 const TypeOopPtr *etype = TypeOopPtr::make_from_klass_common(klass->as_obj_array_klass()->element_klass(), false, try_for_exact); | |
2721 bool xk = etype->klass_is_exact(); | |
2722 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::POS); | |
2723 // We used to pass NotNull in here, asserting that the sub-arrays | |
2724 // are all not-null. This is not true in generally, as code can | |
2725 // slam NULLs down in the subarrays. | |
2726 const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::BotPTR, arr0, klass, xk, 0); | |
2727 return arr; | |
2728 } else if (klass->is_type_array_klass()) { | |
2729 // Element is an typeArray | |
2730 const Type* etype = get_const_basic_type(klass->as_type_array_klass()->element_type()); | |
2731 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::POS); | |
2732 // We used to pass NotNull in here, asserting that the array pointer | |
2733 // is not-null. That was not true in general. | |
2734 const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::BotPTR, arr0, klass, true, 0); | |
2735 return arr; | |
2736 } else { | |
2737 ShouldNotReachHere(); | |
2738 return NULL; | |
2739 } | |
2740 } | |
2741 | |
2742 //------------------------------make_from_constant----------------------------- | |
2743 // Make a java pointer from an oop constant | |
10278 | 2744 const TypeOopPtr* TypeOopPtr::make_from_constant(ciObject* o, |
2745 bool require_constant, | |
2746 bool is_autobox_cache) { | |
2747 assert(!o->is_null_object(), "null object not yet handled here."); | |
2748 ciKlass* klass = o->klass(); | |
2749 if (klass->is_instance_klass()) { | |
2750 // Element is an instance | |
2751 if (require_constant) { | |
2752 if (!o->can_be_constant()) return NULL; | |
2753 } else if (!o->should_be_constant()) { | |
2754 return TypeInstPtr::make(TypePtr::NotNull, klass, true, NULL, 0); | |
2755 } | |
2756 return TypeInstPtr::make(o); | |
2757 } else if (klass->is_obj_array_klass()) { | |
2758 // Element is an object array. Recursively call ourself. | |
2759 const TypeOopPtr *etype = | |
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2760 TypeOopPtr::make_from_klass_raw(klass->as_obj_array_klass()->element_klass()); |
10278 | 2761 if (is_autobox_cache) { |
2762 // The pointers in the autobox arrays are always non-null. | |
2763 etype = etype->cast_to_ptr_type(TypePtr::NotNull)->is_oopptr(); | |
2764 } | |
2765 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::make(o->as_array()->length())); | |
2766 // We used to pass NotNull in here, asserting that the sub-arrays | |
2767 // are all not-null. This is not true in generally, as code can | |
2768 // slam NULLs down in the subarrays. | |
2769 if (require_constant) { | |
2770 if (!o->can_be_constant()) return NULL; | |
2771 } else if (!o->should_be_constant()) { | |
2772 return TypeAryPtr::make(TypePtr::NotNull, arr0, klass, true, 0); | |
2773 } | |
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2774 const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::Constant, o, arr0, klass, true, 0, InstanceBot, NULL, InlineDepthBottom, is_autobox_cache); |
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2775 return arr; |
10278 | 2776 } else if (klass->is_type_array_klass()) { |
2777 // Element is an typeArray | |
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2778 const Type* etype = |
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2779 (Type*)get_const_basic_type(klass->as_type_array_klass()->element_type()); |
10278 | 2780 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::make(o->as_array()->length())); |
2781 // We used to pass NotNull in here, asserting that the array pointer | |
2782 // is not-null. That was not true in general. | |
2783 if (require_constant) { | |
2784 if (!o->can_be_constant()) return NULL; | |
2785 } else if (!o->should_be_constant()) { | |
2786 return TypeAryPtr::make(TypePtr::NotNull, arr0, klass, true, 0); | |
2787 } | |
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2788 const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::Constant, o, arr0, klass, true, 0); |
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2789 return arr; |
0 | 2790 } |
2791 | |
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2792 fatal("unhandled object type"); |
0 | 2793 return NULL; |
2794 } | |
2795 | |
2796 //------------------------------get_con---------------------------------------- | |
2797 intptr_t TypeOopPtr::get_con() const { | |
2798 assert( _ptr == Null || _ptr == Constant, "" ); | |
2799 assert( _offset >= 0, "" ); | |
2800 | |
2801 if (_offset != 0) { | |
2802 // After being ported to the compiler interface, the compiler no longer | |
2803 // directly manipulates the addresses of oops. Rather, it only has a pointer | |
2804 // to a handle at compile time. This handle is embedded in the generated | |
2805 // code and dereferenced at the time the nmethod is made. Until that time, | |
2806 // it is not reasonable to do arithmetic with the addresses of oops (we don't | |
2807 // have access to the addresses!). This does not seem to currently happen, | |
605 | 2808 // but this assertion here is to help prevent its occurence. |
0 | 2809 tty->print_cr("Found oop constant with non-zero offset"); |
2810 ShouldNotReachHere(); | |
2811 } | |
2812 | |
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2813 return (intptr_t)const_oop()->constant_encoding(); |
0 | 2814 } |
2815 | |
2816 | |
2817 //-----------------------------filter------------------------------------------ | |
2818 // Do not allow interface-vs.-noninterface joins to collapse to top. | |
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2819 const Type *TypeOopPtr::filter_helper(const Type *kills, bool include_speculative) const { |
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2820 |
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2821 const Type* ft = join_helper(kills, include_speculative); |
0 | 2822 const TypeInstPtr* ftip = ft->isa_instptr(); |
2823 const TypeInstPtr* ktip = kills->isa_instptr(); | |
2824 | |
2825 if (ft->empty()) { | |
2826 // Check for evil case of 'this' being a class and 'kills' expecting an | |
2827 // interface. This can happen because the bytecodes do not contain | |
2828 // enough type info to distinguish a Java-level interface variable | |
2829 // from a Java-level object variable. If we meet 2 classes which | |
2830 // both implement interface I, but their meet is at 'j/l/O' which | |
2831 // doesn't implement I, we have no way to tell if the result should | |
2832 // be 'I' or 'j/l/O'. Thus we'll pick 'j/l/O'. If this then flows | |
2833 // into a Phi which "knows" it's an Interface type we'll have to | |
2834 // uplift the type. | |
2835 if (!empty() && ktip != NULL && ktip->is_loaded() && ktip->klass()->is_interface()) | |
2836 return kills; // Uplift to interface | |
2837 | |
2838 return Type::TOP; // Canonical empty value | |
2839 } | |
2840 | |
2841 // If we have an interface-typed Phi or cast and we narrow to a class type, | |
2842 // the join should report back the class. However, if we have a J/L/Object | |
2843 // class-typed Phi and an interface flows in, it's possible that the meet & | |
2844 // join report an interface back out. This isn't possible but happens | |
2845 // because the type system doesn't interact well with interfaces. | |
2846 if (ftip != NULL && ktip != NULL && | |
2847 ftip->is_loaded() && ftip->klass()->is_interface() && | |
2848 ktip->is_loaded() && !ktip->klass()->is_interface()) { | |
2849 // Happens in a CTW of rt.jar, 320-341, no extra flags | |
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2850 assert(!ftip->klass_is_exact(), "interface could not be exact"); |
0 | 2851 return ktip->cast_to_ptr_type(ftip->ptr()); |
2852 } | |
2853 | |
2854 return ft; | |
2855 } | |
2856 | |
2857 //------------------------------eq--------------------------------------------- | |
2858 // Structural equality check for Type representations | |
2859 bool TypeOopPtr::eq( const Type *t ) const { | |
2860 const TypeOopPtr *a = (const TypeOopPtr*)t; | |
2861 if (_klass_is_exact != a->_klass_is_exact || | |
12966 | 2862 _instance_id != a->_instance_id || |
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2863 !eq_speculative(a) || |
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2864 _inline_depth != a->_inline_depth) return false; |
0 | 2865 ciObject* one = const_oop(); |
2866 ciObject* two = a->const_oop(); | |
2867 if (one == NULL || two == NULL) { | |
2868 return (one == two) && TypePtr::eq(t); | |
2869 } else { | |
2870 return one->equals(two) && TypePtr::eq(t); | |
2871 } | |
2872 } | |
2873 | |
2874 //------------------------------hash------------------------------------------- | |
2875 // Type-specific hashing function. | |
2876 int TypeOopPtr::hash(void) const { | |
2877 return | |
2878 (const_oop() ? const_oop()->hash() : 0) + | |
2879 _klass_is_exact + | |
2880 _instance_id + | |
12966 | 2881 hash_speculative() + |
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2882 _inline_depth + |
0 | 2883 TypePtr::hash(); |
2884 } | |
2885 | |
2886 //------------------------------dump2------------------------------------------ | |
2887 #ifndef PRODUCT | |
2888 void TypeOopPtr::dump2( Dict &d, uint depth, outputStream *st ) const { | |
2889 st->print("oopptr:%s", ptr_msg[_ptr]); | |
2890 if( _klass_is_exact ) st->print(":exact"); | |
2891 if( const_oop() ) st->print(INTPTR_FORMAT, const_oop()); | |
2892 switch( _offset ) { | |
2893 case OffsetTop: st->print("+top"); break; | |
2894 case OffsetBot: st->print("+any"); break; | |
2895 case 0: break; | |
2896 default: st->print("+%d",_offset); break; | |
2897 } | |
223 | 2898 if (_instance_id == InstanceTop) |
2899 st->print(",iid=top"); | |
2900 else if (_instance_id != InstanceBot) | |
0 | 2901 st->print(",iid=%d",_instance_id); |
12966 | 2902 |
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2903 dump_inline_depth(st); |
12966 | 2904 dump_speculative(st); |
2905 } | |
2906 | |
2907 /** | |
2908 *dump the speculative part of the type | |
2909 */ | |
2910 void TypeOopPtr::dump_speculative(outputStream *st) const { | |
2911 if (_speculative != NULL) { | |
2912 st->print(" (speculative="); | |
2913 _speculative->dump_on(st); | |
2914 st->print(")"); | |
2915 } | |
0 | 2916 } |
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2917 |
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2918 void TypeOopPtr::dump_inline_depth(outputStream *st) const { |
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2919 if (_inline_depth != InlineDepthBottom) { |
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2920 if (_inline_depth == InlineDepthTop) { |
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2921 st->print(" (inline_depth=InlineDepthTop)"); |
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2922 } else { |
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2923 st->print(" (inline_depth=%d)", _inline_depth); |
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2924 } |
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2925 } |
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2926 } |
0 | 2927 #endif |
2928 | |
2929 //------------------------------singleton-------------------------------------- | |
2930 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
2931 // constants | |
2932 bool TypeOopPtr::singleton(void) const { | |
2933 // detune optimizer to not generate constant oop + constant offset as a constant! | |
2934 // TopPTR, Null, AnyNull, Constant are all singletons | |
2935 return (_offset == 0) && !below_centerline(_ptr); | |
2936 } | |
2937 | |
2938 //------------------------------add_offset------------------------------------- | |
12966 | 2939 const TypePtr *TypeOopPtr::add_offset(intptr_t offset) const { |
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2940 return make(_ptr, xadd_offset(offset), _instance_id, add_offset_speculative(offset), _inline_depth); |
12966 | 2941 } |
2942 | |
2943 /** | |
2944 * Return same type without a speculative part | |
2945 */ | |
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2946 const Type* TypeOopPtr::remove_speculative() const { |
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2947 if (_speculative == NULL) { |
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2948 return this; |
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|
2949 } |
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2950 assert(_inline_depth == InlineDepthTop || _inline_depth == InlineDepthBottom, "non speculative type shouldn't have inline depth"); |
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2951 return make(_ptr, _offset, _instance_id, NULL, _inline_depth); |
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2952 } |
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2953 |
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2954 /** |
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2955 * Return same type but with a different inline depth (used for speculation) |
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2956 * |
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2957 * @param depth depth to meet with |
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2958 */ |
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2959 const TypeOopPtr* TypeOopPtr::with_inline_depth(int depth) const { |
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2960 if (!UseInlineDepthForSpeculativeTypes) { |
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2961 return this; |
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|
2962 } |
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2963 return make(_ptr, _offset, _instance_id, _speculative, depth); |
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2964 } |
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2965 |
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2966 /** |
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2967 * Check whether new profiling would improve speculative type |
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2968 * |
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2969 * @param exact_kls class from profiling |
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2970 * @param inline_depth inlining depth of profile point |
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2971 * |
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2972 * @return true if type profile is valuable |
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2973 */ |
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2974 bool TypeOopPtr::would_improve_type(ciKlass* exact_kls, int inline_depth) const { |
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2975 // no way to improve an already exact type |
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2976 if (klass_is_exact()) { |
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|
2977 return false; |
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|
2978 } |
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2979 // no profiling? |
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2980 if (exact_kls == NULL) { |
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2981 return false; |
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|
2982 } |
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2983 // no speculative type or non exact speculative type? |
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2984 if (speculative_type() == NULL) { |
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2985 return true; |
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|
2986 } |
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2987 // If the node already has an exact speculative type keep it, |
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2988 // unless it was provided by profiling that is at a deeper |
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2989 // inlining level. Profiling at a higher inlining depth is |
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2990 // expected to be less accurate. |
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2991 if (_speculative->inline_depth() == InlineDepthBottom) { |
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2992 return false; |
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|
2993 } |
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2994 assert(_speculative->inline_depth() != InlineDepthTop, "can't do the comparison"); |
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2995 return inline_depth < _speculative->inline_depth(); |
0 | 2996 } |
2997 | |
223 | 2998 //------------------------------meet_instance_id-------------------------------- |
2999 int TypeOopPtr::meet_instance_id( int instance_id ) const { | |
3000 // Either is 'TOP' instance? Return the other instance! | |
3001 if( _instance_id == InstanceTop ) return instance_id; | |
3002 if( instance_id == InstanceTop ) return _instance_id; | |
3003 // If either is different, return 'BOTTOM' instance | |
3004 if( _instance_id != instance_id ) return InstanceBot; | |
3005 return _instance_id; | |
0 | 3006 } |
3007 | |
223 | 3008 //------------------------------dual_instance_id-------------------------------- |
3009 int TypeOopPtr::dual_instance_id( ) const { | |
3010 if( _instance_id == InstanceTop ) return InstanceBot; // Map TOP into BOTTOM | |
3011 if( _instance_id == InstanceBot ) return InstanceTop; // Map BOTTOM into TOP | |
3012 return _instance_id; // Map everything else into self | |
3013 } | |
3014 | |
12966 | 3015 /** |
3016 * meet of the speculative parts of 2 types | |
3017 * | |
3018 * @param other type to meet with | |
3019 */ | |
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3020 const TypeOopPtr* TypeOopPtr::xmeet_speculative(const TypeOopPtr* other) const { |
12966 | 3021 bool this_has_spec = (_speculative != NULL); |
3022 bool other_has_spec = (other->speculative() != NULL); | |
3023 | |
3024 if (!this_has_spec && !other_has_spec) { | |
3025 return NULL; | |
3026 } | |
3027 | |
3028 // If we are at a point where control flow meets and one branch has | |
3029 // a speculative type and the other has not, we meet the speculative | |
3030 // type of one branch with the actual type of the other. If the | |
3031 // actual type is exact and the speculative is as well, then the | |
3032 // result is a speculative type which is exact and we can continue | |
3033 // speculation further. | |
3034 const TypeOopPtr* this_spec = _speculative; | |
3035 const TypeOopPtr* other_spec = other->speculative(); | |
3036 | |
3037 if (!this_has_spec) { | |
3038 this_spec = this; | |
3039 } | |
3040 | |
3041 if (!other_has_spec) { | |
3042 other_spec = other; | |
3043 } | |
3044 | |
14383
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3045 return this_spec->meet_speculative(other_spec)->is_oopptr(); |
12966 | 3046 } |
3047 | |
3048 /** | |
3049 * dual of the speculative part of the type | |
3050 */ | |
3051 const TypeOopPtr* TypeOopPtr::dual_speculative() const { | |
3052 if (_speculative == NULL) { | |
3053 return NULL; | |
3054 } | |
3055 return _speculative->dual()->is_oopptr(); | |
3056 } | |
3057 | |
3058 /** | |
3059 * add offset to the speculative part of the type | |
3060 * | |
3061 * @param offset offset to add | |
3062 */ | |
3063 const TypeOopPtr* TypeOopPtr::add_offset_speculative(intptr_t offset) const { | |
3064 if (_speculative == NULL) { | |
3065 return NULL; | |
3066 } | |
3067 return _speculative->add_offset(offset)->is_oopptr(); | |
3068 } | |
3069 | |
3070 /** | |
3071 * Are the speculative parts of 2 types equal? | |
3072 * | |
3073 * @param other type to compare this one to | |
3074 */ | |
3075 bool TypeOopPtr::eq_speculative(const TypeOopPtr* other) const { | |
3076 if (_speculative == NULL || other->speculative() == NULL) { | |
3077 return _speculative == other->speculative(); | |
3078 } | |
3079 | |
3080 if (_speculative->base() != other->speculative()->base()) { | |
3081 return false; | |
3082 } | |
3083 | |
3084 return _speculative->eq(other->speculative()); | |
3085 } | |
3086 | |
3087 /** | |
3088 * Hash of the speculative part of the type | |
3089 */ | |
3090 int TypeOopPtr::hash_speculative() const { | |
3091 if (_speculative == NULL) { | |
3092 return 0; | |
3093 } | |
3094 | |
3095 return _speculative->hash(); | |
3096 } | |
3097 | |
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3098 /** |
484a359ff649
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3099 * dual of the inline depth for this type (used for speculation) |
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3100 */ |
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3101 int TypeOopPtr::dual_inline_depth() const { |
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3102 return -inline_depth(); |
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3103 } |
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3104 |
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3105 /** |
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3106 * meet of 2 inline depth (used for speculation) |
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3107 * |
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3108 * @param depth depth to meet with |
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3109 */ |
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3110 int TypeOopPtr::meet_inline_depth(int depth) const { |
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3111 return MAX2(inline_depth(), depth); |
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3112 } |
223 | 3113 |
0 | 3114 //============================================================================= |
3115 // Convenience common pre-built types. | |
3116 const TypeInstPtr *TypeInstPtr::NOTNULL; | |
3117 const TypeInstPtr *TypeInstPtr::BOTTOM; | |
3118 const TypeInstPtr *TypeInstPtr::MIRROR; | |
3119 const TypeInstPtr *TypeInstPtr::MARK; | |
3120 const TypeInstPtr *TypeInstPtr::KLASS; | |
3121 | |
3122 //------------------------------TypeInstPtr------------------------------------- | |
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3123 TypeInstPtr::TypeInstPtr(PTR ptr, ciKlass* k, bool xk, ciObject* o, int off, int instance_id, const TypeOopPtr* speculative, int inline_depth) |
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3124 : TypeOopPtr(InstPtr, ptr, k, xk, o, off, instance_id, speculative, inline_depth), _name(k->name()) { |
0 | 3125 assert(k != NULL && |
3126 (k->is_loaded() || o == NULL), | |
3127 "cannot have constants with non-loaded klass"); | |
3128 }; | |
3129 | |
3130 //------------------------------make------------------------------------------- | |
3131 const TypeInstPtr *TypeInstPtr::make(PTR ptr, | |
3132 ciKlass* k, | |
3133 bool xk, | |
3134 ciObject* o, | |
3135 int offset, | |
12966 | 3136 int instance_id, |
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3137 const TypeOopPtr* speculative, |
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3138 int inline_depth) { |
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3139 assert( !k->is_loaded() || k->is_instance_klass(), "Must be for instance"); |
0 | 3140 // Either const_oop() is NULL or else ptr is Constant |
3141 assert( (!o && ptr != Constant) || (o && ptr == Constant), | |
3142 "constant pointers must have a value supplied" ); | |
3143 // Ptr is never Null | |
3144 assert( ptr != Null, "NULL pointers are not typed" ); | |
3145 | |
247 | 3146 assert(instance_id <= 0 || xk || !UseExactTypes, "instances are always exactly typed"); |
0 | 3147 if (!UseExactTypes) xk = false; |
3148 if (ptr == Constant) { | |
3149 // Note: This case includes meta-object constants, such as methods. | |
3150 xk = true; | |
3151 } else if (k->is_loaded()) { | |
3152 ciInstanceKlass* ik = k->as_instance_klass(); | |
3153 if (!xk && ik->is_final()) xk = true; // no inexact final klass | |
3154 if (xk && ik->is_interface()) xk = false; // no exact interface | |
3155 } | |
3156 | |
3157 // Now hash this baby | |
3158 TypeInstPtr *result = | |
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3159 (TypeInstPtr*)(new TypeInstPtr(ptr, k, xk, o ,offset, instance_id, speculative, inline_depth))->hashcons(); |
0 | 3160 |
3161 return result; | |
3162 } | |
3163 | |
10278 | 3164 /** |
3165 * Create constant type for a constant boxed value | |
3166 */ | |
3167 const Type* TypeInstPtr::get_const_boxed_value() const { | |
3168 assert(is_ptr_to_boxed_value(), "should be called only for boxed value"); | |
3169 assert((const_oop() != NULL), "should be called only for constant object"); | |
3170 ciConstant constant = const_oop()->as_instance()->field_value_by_offset(offset()); | |
3171 BasicType bt = constant.basic_type(); | |
3172 switch (bt) { | |
3173 case T_BOOLEAN: return TypeInt::make(constant.as_boolean()); | |
3174 case T_INT: return TypeInt::make(constant.as_int()); | |
3175 case T_CHAR: return TypeInt::make(constant.as_char()); | |
3176 case T_BYTE: return TypeInt::make(constant.as_byte()); | |
3177 case T_SHORT: return TypeInt::make(constant.as_short()); | |
3178 case T_FLOAT: return TypeF::make(constant.as_float()); | |
3179 case T_DOUBLE: return TypeD::make(constant.as_double()); | |
3180 case T_LONG: return TypeLong::make(constant.as_long()); | |
3181 default: break; | |
3182 } | |
3183 fatal(err_msg_res("Invalid boxed value type '%s'", type2name(bt))); | |
3184 return NULL; | |
3185 } | |
0 | 3186 |
3187 //------------------------------cast_to_ptr_type------------------------------- | |
3188 const Type *TypeInstPtr::cast_to_ptr_type(PTR ptr) const { | |
3189 if( ptr == _ptr ) return this; | |
3190 // Reconstruct _sig info here since not a problem with later lazy | |
3191 // construction, _sig will show up on demand. | |
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3192 return make(ptr, klass(), klass_is_exact(), const_oop(), _offset, _instance_id, _speculative, _inline_depth); |
0 | 3193 } |
3194 | |
3195 | |
3196 //-----------------------------cast_to_exactness------------------------------- | |
3197 const Type *TypeInstPtr::cast_to_exactness(bool klass_is_exact) const { | |
3198 if( klass_is_exact == _klass_is_exact ) return this; | |
3199 if (!UseExactTypes) return this; | |
3200 if (!_klass->is_loaded()) return this; | |
3201 ciInstanceKlass* ik = _klass->as_instance_klass(); | |
3202 if( (ik->is_final() || _const_oop) ) return this; // cannot clear xk | |
3203 if( ik->is_interface() ) return this; // cannot set xk | |
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3204 return make(ptr(), klass(), klass_is_exact, const_oop(), _offset, _instance_id, _speculative, _inline_depth); |
0 | 3205 } |
3206 | |
247 | 3207 //-----------------------------cast_to_instance_id---------------------------- |
223 | 3208 const TypeOopPtr *TypeInstPtr::cast_to_instance_id(int instance_id) const { |
3209 if( instance_id == _instance_id ) return this; | |
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3210 return make(_ptr, klass(), _klass_is_exact, const_oop(), _offset, instance_id, _speculative, _inline_depth); |
0 | 3211 } |
3212 | |
3213 //------------------------------xmeet_unloaded--------------------------------- | |
3214 // Compute the MEET of two InstPtrs when at least one is unloaded. | |
3215 // Assume classes are different since called after check for same name/class-loader | |
3216 const TypeInstPtr *TypeInstPtr::xmeet_unloaded(const TypeInstPtr *tinst) const { | |
3217 int off = meet_offset(tinst->offset()); | |
3218 PTR ptr = meet_ptr(tinst->ptr()); | |
992 | 3219 int instance_id = meet_instance_id(tinst->instance_id()); |
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3220 const TypeOopPtr* speculative = xmeet_speculative(tinst); |
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3221 int depth = meet_inline_depth(tinst->inline_depth()); |
0 | 3222 |
3223 const TypeInstPtr *loaded = is_loaded() ? this : tinst; | |
3224 const TypeInstPtr *unloaded = is_loaded() ? tinst : this; | |
3225 if( loaded->klass()->equals(ciEnv::current()->Object_klass()) ) { | |
3226 // | |
3227 // Meet unloaded class with java/lang/Object | |
3228 // | |
3229 // Meet | |
3230 // | Unloaded Class | |
3231 // Object | TOP | AnyNull | Constant | NotNull | BOTTOM | | |
3232 // =================================================================== | |
3233 // TOP | ..........................Unloaded......................| | |
3234 // AnyNull | U-AN |................Unloaded......................| | |
3235 // Constant | ... O-NN .................................. | O-BOT | | |
3236 // NotNull | ... O-NN .................................. | O-BOT | | |
3237 // BOTTOM | ........................Object-BOTTOM ..................| | |
3238 // | |
3239 assert(loaded->ptr() != TypePtr::Null, "insanity check"); | |
3240 // | |
3241 if( loaded->ptr() == TypePtr::TopPTR ) { return unloaded; } | |
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3242 else if (loaded->ptr() == TypePtr::AnyNull) { return TypeInstPtr::make(ptr, unloaded->klass(), false, NULL, off, instance_id, speculative, depth); } |
0 | 3243 else if (loaded->ptr() == TypePtr::BotPTR ) { return TypeInstPtr::BOTTOM; } |
3244 else if (loaded->ptr() == TypePtr::Constant || loaded->ptr() == TypePtr::NotNull) { | |
3245 if (unloaded->ptr() == TypePtr::BotPTR ) { return TypeInstPtr::BOTTOM; } | |
3246 else { return TypeInstPtr::NOTNULL; } | |
3247 } | |
3248 else if( unloaded->ptr() == TypePtr::TopPTR ) { return unloaded; } | |
3249 | |
3250 return unloaded->cast_to_ptr_type(TypePtr::AnyNull)->is_instptr(); | |
3251 } | |
3252 | |
3253 // Both are unloaded, not the same class, not Object | |
3254 // Or meet unloaded with a different loaded class, not java/lang/Object | |
3255 if( ptr != TypePtr::BotPTR ) { | |
3256 return TypeInstPtr::NOTNULL; | |
3257 } | |
3258 return TypeInstPtr::BOTTOM; | |
3259 } | |
3260 | |
3261 | |
3262 //------------------------------meet------------------------------------------- | |
3263 // Compute the MEET of two types. It returns a new Type object. | |
12966 | 3264 const Type *TypeInstPtr::xmeet_helper(const Type *t) const { |
0 | 3265 // Perform a fast test for common case; meeting the same types together. |
3266 if( this == t ) return this; // Meeting same type-rep? | |
3267 | |
3268 // Current "this->_base" is Pointer | |
3269 switch (t->base()) { // switch on original type | |
3270 | |
3271 case Int: // Mixing ints & oops happens when javac | |
3272 case Long: // reuses local variables | |
3273 case FloatTop: | |
3274 case FloatCon: | |
3275 case FloatBot: | |
3276 case DoubleTop: | |
3277 case DoubleCon: | |
3278 case DoubleBot: | |
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3279 case NarrowOop: |
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3280 case NarrowKlass: |
0 | 3281 case Bottom: // Ye Olde Default |
3282 return Type::BOTTOM; | |
3283 case Top: | |
3284 return this; | |
3285 | |
3286 default: // All else is a mistake | |
3287 typerr(t); | |
3288 | |
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3289 case MetadataPtr: |
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3290 case KlassPtr: |
0 | 3291 case RawPtr: return TypePtr::BOTTOM; |
3292 | |
3293 case AryPtr: { // All arrays inherit from Object class | |
3294 const TypeAryPtr *tp = t->is_aryptr(); | |
3295 int offset = meet_offset(tp->offset()); | |
3296 PTR ptr = meet_ptr(tp->ptr()); | |
223 | 3297 int instance_id = meet_instance_id(tp->instance_id()); |
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3298 const TypeOopPtr* speculative = xmeet_speculative(tp); |
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3299 int depth = meet_inline_depth(tp->inline_depth()); |
0 | 3300 switch (ptr) { |
3301 case TopPTR: | |
3302 case AnyNull: // Fall 'down' to dual of object klass | |
12966 | 3303 // For instances when a subclass meets a superclass we fall |
3304 // below the centerline when the superclass is exact. We need to | |
3305 // do the same here. | |
3306 if (klass()->equals(ciEnv::current()->Object_klass()) && !klass_is_exact()) { | |
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3307 return TypeAryPtr::make(ptr, tp->ary(), tp->klass(), tp->klass_is_exact(), offset, instance_id, speculative, depth); |
0 | 3308 } else { |
3309 // cannot subclass, so the meet has to fall badly below the centerline | |
3310 ptr = NotNull; | |
223 | 3311 instance_id = InstanceBot; |
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3312 return TypeInstPtr::make( ptr, ciEnv::current()->Object_klass(), false, NULL, offset, instance_id, speculative, depth); |
0 | 3313 } |
3314 case Constant: | |
3315 case NotNull: | |
3316 case BotPTR: // Fall down to object klass | |
3317 // LCA is object_klass, but if we subclass from the top we can do better | |
3318 if( above_centerline(_ptr) ) { // if( _ptr == TopPTR || _ptr == AnyNull ) | |
3319 // If 'this' (InstPtr) is above the centerline and it is Object class | |
605 | 3320 // then we can subclass in the Java class hierarchy. |
12966 | 3321 // For instances when a subclass meets a superclass we fall |
3322 // below the centerline when the superclass is exact. We need | |
3323 // to do the same here. | |
3324 if (klass()->equals(ciEnv::current()->Object_klass()) && !klass_is_exact()) { | |
0 | 3325 // that is, tp's array type is a subtype of my klass |
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3326 return TypeAryPtr::make(ptr, (ptr == Constant ? tp->const_oop() : NULL), |
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3327 tp->ary(), tp->klass(), tp->klass_is_exact(), offset, instance_id, speculative, depth); |
0 | 3328 } |
3329 } | |
3330 // The other case cannot happen, since I cannot be a subtype of an array. | |
3331 // The meet falls down to Object class below centerline. | |
3332 if( ptr == Constant ) | |
3333 ptr = NotNull; | |
223 | 3334 instance_id = InstanceBot; |
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3335 return make(ptr, ciEnv::current()->Object_klass(), false, NULL, offset, instance_id, speculative, depth); |
0 | 3336 default: typerr(t); |
3337 } | |
3338 } | |
3339 | |
3340 case OopPtr: { // Meeting to OopPtrs | |
3341 // Found a OopPtr type vs self-InstPtr type | |
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3342 const TypeOopPtr *tp = t->is_oopptr(); |
0 | 3343 int offset = meet_offset(tp->offset()); |
3344 PTR ptr = meet_ptr(tp->ptr()); | |
3345 switch (tp->ptr()) { | |
3346 case TopPTR: | |
223 | 3347 case AnyNull: { |
3348 int instance_id = meet_instance_id(InstanceTop); | |
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3349 const TypeOopPtr* speculative = xmeet_speculative(tp); |
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3350 int depth = meet_inline_depth(tp->inline_depth()); |
0 | 3351 return make(ptr, klass(), klass_is_exact(), |
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3352 (ptr == Constant ? const_oop() : NULL), offset, instance_id, speculative, depth); |
223 | 3353 } |
0 | 3354 case NotNull: |
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3355 case BotPTR: { |
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3356 int instance_id = meet_instance_id(tp->instance_id()); |
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3357 const TypeOopPtr* speculative = xmeet_speculative(tp); |
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3358 int depth = meet_inline_depth(tp->inline_depth()); |
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3359 return TypeOopPtr::make(ptr, offset, instance_id, speculative, depth); |
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3360 } |
0 | 3361 default: typerr(t); |
3362 } | |
3363 } | |
3364 | |
3365 case AnyPtr: { // Meeting to AnyPtrs | |
3366 // Found an AnyPtr type vs self-InstPtr type | |
3367 const TypePtr *tp = t->is_ptr(); | |
3368 int offset = meet_offset(tp->offset()); | |
3369 PTR ptr = meet_ptr(tp->ptr()); | |
3370 switch (tp->ptr()) { | |
3371 case Null: | |
12966 | 3372 if( ptr == Null ) return TypePtr::make(AnyPtr, ptr, offset); |
223 | 3373 // else fall through to AnyNull |
0 | 3374 case TopPTR: |
223 | 3375 case AnyNull: { |
3376 int instance_id = meet_instance_id(InstanceTop); | |
12966 | 3377 const TypeOopPtr* speculative = _speculative; |
3378 return make(ptr, klass(), klass_is_exact(), | |
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3379 (ptr == Constant ? const_oop() : NULL), offset, instance_id, speculative, _inline_depth); |
223 | 3380 } |
0 | 3381 case NotNull: |
3382 case BotPTR: | |
12966 | 3383 return TypePtr::make(AnyPtr, ptr, offset); |
0 | 3384 default: typerr(t); |
3385 } | |
3386 } | |
3387 | |
3388 /* | |
3389 A-top } | |
3390 / | \ } Tops | |
3391 B-top A-any C-top } | |
3392 | / | \ | } Any-nulls | |
3393 B-any | C-any } | |
3394 | | | | |
3395 B-con A-con C-con } constants; not comparable across classes | |
3396 | | | | |
3397 B-not | C-not } | |
3398 | \ | / | } not-nulls | |
3399 B-bot A-not C-bot } | |
3400 \ | / } Bottoms | |
3401 A-bot } | |
3402 */ | |
3403 | |
3404 case InstPtr: { // Meeting 2 Oops? | |
3405 // Found an InstPtr sub-type vs self-InstPtr type | |
3406 const TypeInstPtr *tinst = t->is_instptr(); | |
3407 int off = meet_offset( tinst->offset() ); | |
3408 PTR ptr = meet_ptr( tinst->ptr() ); | |
223 | 3409 int instance_id = meet_instance_id(tinst->instance_id()); |
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3410 const TypeOopPtr* speculative = xmeet_speculative(tinst); |
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3411 int depth = meet_inline_depth(tinst->inline_depth()); |
0 | 3412 |
3413 // Check for easy case; klasses are equal (and perhaps not loaded!) | |
3414 // If we have constants, then we created oops so classes are loaded | |
3415 // and we can handle the constants further down. This case handles | |
3416 // both-not-loaded or both-loaded classes | |
3417 if (ptr != Constant && klass()->equals(tinst->klass()) && klass_is_exact() == tinst->klass_is_exact()) { | |
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3418 return make(ptr, klass(), klass_is_exact(), NULL, off, instance_id, speculative, depth); |
0 | 3419 } |
3420 | |
3421 // Classes require inspection in the Java klass hierarchy. Must be loaded. | |
3422 ciKlass* tinst_klass = tinst->klass(); | |
3423 ciKlass* this_klass = this->klass(); | |
3424 bool tinst_xk = tinst->klass_is_exact(); | |
3425 bool this_xk = this->klass_is_exact(); | |
3426 if (!tinst_klass->is_loaded() || !this_klass->is_loaded() ) { | |
3427 // One of these classes has not been loaded | |
3428 const TypeInstPtr *unloaded_meet = xmeet_unloaded(tinst); | |
3429 #ifndef PRODUCT | |
3430 if( PrintOpto && Verbose ) { | |
3431 tty->print("meet of unloaded classes resulted in: "); unloaded_meet->dump(); tty->cr(); | |
3432 tty->print(" this == "); this->dump(); tty->cr(); | |
3433 tty->print(" tinst == "); tinst->dump(); tty->cr(); | |
3434 } | |
3435 #endif | |
3436 return unloaded_meet; | |
3437 } | |
3438 | |
3439 // Handle mixing oops and interfaces first. | |
12966 | 3440 if( this_klass->is_interface() && !(tinst_klass->is_interface() || |
3441 tinst_klass == ciEnv::current()->Object_klass())) { | |
0 | 3442 ciKlass *tmp = tinst_klass; // Swap interface around |
3443 tinst_klass = this_klass; | |
3444 this_klass = tmp; | |
3445 bool tmp2 = tinst_xk; | |
3446 tinst_xk = this_xk; | |
3447 this_xk = tmp2; | |
3448 } | |
3449 if (tinst_klass->is_interface() && | |
3450 !(this_klass->is_interface() || | |
3451 // Treat java/lang/Object as an honorary interface, | |
3452 // because we need a bottom for the interface hierarchy. | |
3453 this_klass == ciEnv::current()->Object_klass())) { | |
3454 // Oop meets interface! | |
3455 | |
3456 // See if the oop subtypes (implements) interface. | |
3457 ciKlass *k; | |
3458 bool xk; | |
3459 if( this_klass->is_subtype_of( tinst_klass ) ) { | |
3460 // Oop indeed subtypes. Now keep oop or interface depending | |
3461 // on whether we are both above the centerline or either is | |
3462 // below the centerline. If we are on the centerline | |
3463 // (e.g., Constant vs. AnyNull interface), use the constant. | |
3464 k = below_centerline(ptr) ? tinst_klass : this_klass; | |
3465 // If we are keeping this_klass, keep its exactness too. | |
3466 xk = below_centerline(ptr) ? tinst_xk : this_xk; | |
3467 } else { // Does not implement, fall to Object | |
3468 // Oop does not implement interface, so mixing falls to Object | |
3469 // just like the verifier does (if both are above the | |
3470 // centerline fall to interface) | |
3471 k = above_centerline(ptr) ? tinst_klass : ciEnv::current()->Object_klass(); | |
3472 xk = above_centerline(ptr) ? tinst_xk : false; | |
3473 // Watch out for Constant vs. AnyNull interface. | |
3474 if (ptr == Constant) ptr = NotNull; // forget it was a constant | |
247 | 3475 instance_id = InstanceBot; |
0 | 3476 } |
3477 ciObject* o = NULL; // the Constant value, if any | |
3478 if (ptr == Constant) { | |
3479 // Find out which constant. | |
3480 o = (this_klass == klass()) ? const_oop() : tinst->const_oop(); | |
3481 } | |
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3482 return make(ptr, k, xk, o, off, instance_id, speculative, depth); |
0 | 3483 } |
3484 | |
3485 // Either oop vs oop or interface vs interface or interface vs Object | |
3486 | |
3487 // !!! Here's how the symmetry requirement breaks down into invariants: | |
3488 // If we split one up & one down AND they subtype, take the down man. | |
3489 // If we split one up & one down AND they do NOT subtype, "fall hard". | |
3490 // If both are up and they subtype, take the subtype class. | |
3491 // If both are up and they do NOT subtype, "fall hard". | |
3492 // If both are down and they subtype, take the supertype class. | |
3493 // If both are down and they do NOT subtype, "fall hard". | |
3494 // Constants treated as down. | |
3495 | |
3496 // Now, reorder the above list; observe that both-down+subtype is also | |
3497 // "fall hard"; "fall hard" becomes the default case: | |
3498 // If we split one up & one down AND they subtype, take the down man. | |
3499 // If both are up and they subtype, take the subtype class. | |
3500 | |
3501 // If both are down and they subtype, "fall hard". | |
3502 // If both are down and they do NOT subtype, "fall hard". | |
3503 // If both are up and they do NOT subtype, "fall hard". | |
3504 // If we split one up & one down AND they do NOT subtype, "fall hard". | |
3505 | |
3506 // If a proper subtype is exact, and we return it, we return it exactly. | |
3507 // If a proper supertype is exact, there can be no subtyping relationship! | |
3508 // If both types are equal to the subtype, exactness is and-ed below the | |
3509 // centerline and or-ed above it. (N.B. Constants are always exact.) | |
3510 | |
3511 // Check for subtyping: | |
3512 ciKlass *subtype = NULL; | |
3513 bool subtype_exact = false; | |
3514 if( tinst_klass->equals(this_klass) ) { | |
3515 subtype = this_klass; | |
3516 subtype_exact = below_centerline(ptr) ? (this_xk & tinst_xk) : (this_xk | tinst_xk); | |
3517 } else if( !tinst_xk && this_klass->is_subtype_of( tinst_klass ) ) { | |
3518 subtype = this_klass; // Pick subtyping class | |
3519 subtype_exact = this_xk; | |
3520 } else if( !this_xk && tinst_klass->is_subtype_of( this_klass ) ) { | |
3521 subtype = tinst_klass; // Pick subtyping class | |
3522 subtype_exact = tinst_xk; | |
3523 } | |
3524 | |
3525 if( subtype ) { | |
3526 if( above_centerline(ptr) ) { // both are up? | |
3527 this_klass = tinst_klass = subtype; | |
3528 this_xk = tinst_xk = subtype_exact; | |
3529 } else if( above_centerline(this ->_ptr) && !above_centerline(tinst->_ptr) ) { | |
3530 this_klass = tinst_klass; // tinst is down; keep down man | |
3531 this_xk = tinst_xk; | |
3532 } else if( above_centerline(tinst->_ptr) && !above_centerline(this ->_ptr) ) { | |
3533 tinst_klass = this_klass; // this is down; keep down man | |
3534 tinst_xk = this_xk; | |
3535 } else { | |
3536 this_xk = subtype_exact; // either they are equal, or we'll do an LCA | |
3537 } | |
3538 } | |
3539 | |
3540 // Check for classes now being equal | |
3541 if (tinst_klass->equals(this_klass)) { | |
3542 // If the klasses are equal, the constants may still differ. Fall to | |
3543 // NotNull if they do (neither constant is NULL; that is a special case | |
3544 // handled elsewhere). | |
3545 ciObject* o = NULL; // Assume not constant when done | |
3546 ciObject* this_oop = const_oop(); | |
3547 ciObject* tinst_oop = tinst->const_oop(); | |
3548 if( ptr == Constant ) { | |
3549 if (this_oop != NULL && tinst_oop != NULL && | |
3550 this_oop->equals(tinst_oop) ) | |
3551 o = this_oop; | |
3552 else if (above_centerline(this ->_ptr)) | |
3553 o = tinst_oop; | |
3554 else if (above_centerline(tinst ->_ptr)) | |
3555 o = this_oop; | |
3556 else | |
3557 ptr = NotNull; | |
3558 } | |
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3559 return make(ptr, this_klass, this_xk, o, off, instance_id, speculative, depth); |
0 | 3560 } // Else classes are not equal |
3561 | |
3562 // Since klasses are different, we require a LCA in the Java | |
3563 // class hierarchy - which means we have to fall to at least NotNull. | |
3564 if( ptr == TopPTR || ptr == AnyNull || ptr == Constant ) | |
3565 ptr = NotNull; | |
247 | 3566 instance_id = InstanceBot; |
0 | 3567 |
3568 // Now we find the LCA of Java classes | |
3569 ciKlass* k = this_klass->least_common_ancestor(tinst_klass); | |
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3570 return make(ptr, k, false, NULL, off, instance_id, speculative, depth); |
0 | 3571 } // End of case InstPtr |
3572 | |
3573 } // End of switch | |
3574 return this; // Return the double constant | |
3575 } | |
3576 | |
3577 | |
3578 //------------------------java_mirror_type-------------------------------------- | |
3579 ciType* TypeInstPtr::java_mirror_type() const { | |
3580 // must be a singleton type | |
3581 if( const_oop() == NULL ) return NULL; | |
3582 | |
3583 // must be of type java.lang.Class | |
3584 if( klass() != ciEnv::current()->Class_klass() ) return NULL; | |
3585 | |
3586 return const_oop()->as_instance()->java_mirror_type(); | |
3587 } | |
3588 | |
3589 | |
3590 //------------------------------xdual------------------------------------------ | |
3591 // Dual: do NOT dual on klasses. This means I do NOT understand the Java | |
605 | 3592 // inheritance mechanism. |
0 | 3593 const Type *TypeInstPtr::xdual() const { |
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3594 return new TypeInstPtr(dual_ptr(), klass(), klass_is_exact(), const_oop(), dual_offset(), dual_instance_id(), dual_speculative(), dual_inline_depth()); |
0 | 3595 } |
3596 | |
3597 //------------------------------eq--------------------------------------------- | |
3598 // Structural equality check for Type representations | |
3599 bool TypeInstPtr::eq( const Type *t ) const { | |
3600 const TypeInstPtr *p = t->is_instptr(); | |
3601 return | |
3602 klass()->equals(p->klass()) && | |
3603 TypeOopPtr::eq(p); // Check sub-type stuff | |
3604 } | |
3605 | |
3606 //------------------------------hash------------------------------------------- | |
3607 // Type-specific hashing function. | |
3608 int TypeInstPtr::hash(void) const { | |
3609 int hash = klass()->hash() + TypeOopPtr::hash(); | |
3610 return hash; | |
3611 } | |
3612 | |
3613 //------------------------------dump2------------------------------------------ | |
3614 // Dump oop Type | |
3615 #ifndef PRODUCT | |
3616 void TypeInstPtr::dump2( Dict &d, uint depth, outputStream *st ) const { | |
3617 // Print the name of the klass. | |
3618 klass()->print_name_on(st); | |
3619 | |
3620 switch( _ptr ) { | |
3621 case Constant: | |
3622 // TO DO: Make CI print the hex address of the underlying oop. | |
3623 if (WizardMode || Verbose) { | |
3624 const_oop()->print_oop(st); | |
3625 } | |
3626 case BotPTR: | |
3627 if (!WizardMode && !Verbose) { | |
3628 if( _klass_is_exact ) st->print(":exact"); | |
3629 break; | |
3630 } | |
3631 case TopPTR: | |
3632 case AnyNull: | |
3633 case NotNull: | |
3634 st->print(":%s", ptr_msg[_ptr]); | |
3635 if( _klass_is_exact ) st->print(":exact"); | |
3636 break; | |
3637 } | |
3638 | |
3639 if( _offset ) { // Dump offset, if any | |
3640 if( _offset == OffsetBot ) st->print("+any"); | |
3641 else if( _offset == OffsetTop ) st->print("+unknown"); | |
3642 else st->print("+%d", _offset); | |
3643 } | |
3644 | |
3645 st->print(" *"); | |
223 | 3646 if (_instance_id == InstanceTop) |
3647 st->print(",iid=top"); | |
3648 else if (_instance_id != InstanceBot) | |
0 | 3649 st->print(",iid=%d",_instance_id); |
12966 | 3650 |
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3651 dump_inline_depth(st); |
12966 | 3652 dump_speculative(st); |
0 | 3653 } |
3654 #endif | |
3655 | |
3656 //------------------------------add_offset------------------------------------- | |
12966 | 3657 const TypePtr *TypeInstPtr::add_offset(intptr_t offset) const { |
3658 return make(_ptr, klass(), klass_is_exact(), const_oop(), xadd_offset(offset), _instance_id, add_offset_speculative(offset)); | |
3659 } | |
3660 | |
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3661 const Type *TypeInstPtr::remove_speculative() const { |
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3662 if (_speculative == NULL) { |
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3663 return this; |
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3664 } |
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3665 assert(_inline_depth == InlineDepthTop || _inline_depth == InlineDepthBottom, "non speculative type shouldn't have inline depth"); |
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3666 return make(_ptr, klass(), klass_is_exact(), const_oop(), _offset, _instance_id, NULL, _inline_depth); |
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3667 } |
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3668 |
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3669 const TypeOopPtr *TypeInstPtr::with_inline_depth(int depth) const { |
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3670 if (!UseInlineDepthForSpeculativeTypes) { |
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3671 return this; |
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3672 } |
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3673 return make(_ptr, klass(), klass_is_exact(), const_oop(), _offset, _instance_id, _speculative, depth); |
0 | 3674 } |
3675 | |
3676 //============================================================================= | |
3677 // Convenience common pre-built types. | |
3678 const TypeAryPtr *TypeAryPtr::RANGE; | |
3679 const TypeAryPtr *TypeAryPtr::OOPS; | |
163 | 3680 const TypeAryPtr *TypeAryPtr::NARROWOOPS; |
0 | 3681 const TypeAryPtr *TypeAryPtr::BYTES; |
3682 const TypeAryPtr *TypeAryPtr::SHORTS; | |
3683 const TypeAryPtr *TypeAryPtr::CHARS; | |
3684 const TypeAryPtr *TypeAryPtr::INTS; | |
3685 const TypeAryPtr *TypeAryPtr::LONGS; | |
3686 const TypeAryPtr *TypeAryPtr::FLOATS; | |
3687 const TypeAryPtr *TypeAryPtr::DOUBLES; | |
3688 | |
3689 //------------------------------make------------------------------------------- | |
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3690 const TypeAryPtr *TypeAryPtr::make(PTR ptr, const TypeAry *ary, ciKlass* k, bool xk, int offset, int instance_id, const TypeOopPtr* speculative, int inline_depth) { |
0 | 3691 assert(!(k == NULL && ary->_elem->isa_int()), |
3692 "integral arrays must be pre-equipped with a class"); | |
3693 if (!xk) xk = ary->ary_must_be_exact(); | |
247 | 3694 assert(instance_id <= 0 || xk || !UseExactTypes, "instances are always exactly typed"); |
0 | 3695 if (!UseExactTypes) xk = (ptr == Constant); |
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3696 return (TypeAryPtr*)(new TypeAryPtr(ptr, NULL, ary, k, xk, offset, instance_id, false, speculative, inline_depth))->hashcons(); |
0 | 3697 } |
3698 | |
3699 //------------------------------make------------------------------------------- | |
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3700 const TypeAryPtr *TypeAryPtr::make(PTR ptr, ciObject* o, const TypeAry *ary, ciKlass* k, bool xk, int offset, int instance_id, const TypeOopPtr* speculative, int inline_depth, bool is_autobox_cache) { |
0 | 3701 assert(!(k == NULL && ary->_elem->isa_int()), |
3702 "integral arrays must be pre-equipped with a class"); | |
3703 assert( (ptr==Constant && o) || (ptr!=Constant && !o), "" ); | |
3704 if (!xk) xk = (o != NULL) || ary->ary_must_be_exact(); | |
247 | 3705 assert(instance_id <= 0 || xk || !UseExactTypes, "instances are always exactly typed"); |
0 | 3706 if (!UseExactTypes) xk = (ptr == Constant); |
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3707 return (TypeAryPtr*)(new TypeAryPtr(ptr, o, ary, k, xk, offset, instance_id, is_autobox_cache, speculative, inline_depth))->hashcons(); |
0 | 3708 } |
3709 | |
3710 //------------------------------cast_to_ptr_type------------------------------- | |
3711 const Type *TypeAryPtr::cast_to_ptr_type(PTR ptr) const { | |
3712 if( ptr == _ptr ) return this; | |
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3713 return make(ptr, const_oop(), _ary, klass(), klass_is_exact(), _offset, _instance_id, _speculative, _inline_depth); |
0 | 3714 } |
3715 | |
3716 | |
3717 //-----------------------------cast_to_exactness------------------------------- | |
3718 const Type *TypeAryPtr::cast_to_exactness(bool klass_is_exact) const { | |
3719 if( klass_is_exact == _klass_is_exact ) return this; | |
3720 if (!UseExactTypes) return this; | |
3721 if (_ary->ary_must_be_exact()) return this; // cannot clear xk | |
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3722 return make(ptr(), const_oop(), _ary, klass(), klass_is_exact, _offset, _instance_id, _speculative, _inline_depth); |
0 | 3723 } |
3724 | |
247 | 3725 //-----------------------------cast_to_instance_id---------------------------- |
223 | 3726 const TypeOopPtr *TypeAryPtr::cast_to_instance_id(int instance_id) const { |
3727 if( instance_id == _instance_id ) return this; | |
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3728 return make(_ptr, const_oop(), _ary, klass(), _klass_is_exact, _offset, instance_id, _speculative, _inline_depth); |
0 | 3729 } |
3730 | |
3731 //-----------------------------narrow_size_type------------------------------- | |
3732 // Local cache for arrayOopDesc::max_array_length(etype), | |
3733 // which is kind of slow (and cached elsewhere by other users). | |
3734 static jint max_array_length_cache[T_CONFLICT+1]; | |
3735 static jint max_array_length(BasicType etype) { | |
3736 jint& cache = max_array_length_cache[etype]; | |
3737 jint res = cache; | |
3738 if (res == 0) { | |
3739 switch (etype) { | |
113
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3740 case T_NARROWOOP: |
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3741 etype = T_OBJECT; |
ba764ed4b6f2
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3742 break; |
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3743 case T_NARROWKLASS: |
0 | 3744 case T_CONFLICT: |
3745 case T_ILLEGAL: | |
3746 case T_VOID: | |
3747 etype = T_BYTE; // will produce conservatively high value | |
3748 } | |
3749 cache = res = arrayOopDesc::max_array_length(etype); | |
3750 } | |
3751 return res; | |
3752 } | |
3753 | |
3754 // Narrow the given size type to the index range for the given array base type. | |
3755 // Return NULL if the resulting int type becomes empty. | |
366
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3756 const TypeInt* TypeAryPtr::narrow_size_type(const TypeInt* size) const { |
0 | 3757 jint hi = size->_hi; |
3758 jint lo = size->_lo; | |
3759 jint min_lo = 0; | |
366
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3760 jint max_hi = max_array_length(elem()->basic_type()); |
0 | 3761 //if (index_not_size) --max_hi; // type of a valid array index, FTR |
3762 bool chg = false; | |
10278 | 3763 if (lo < min_lo) { |
3764 lo = min_lo; | |
3765 if (size->is_con()) { | |
3766 hi = lo; | |
3767 } | |
3768 chg = true; | |
3769 } | |
3770 if (hi > max_hi) { | |
3771 hi = max_hi; | |
3772 if (size->is_con()) { | |
3773 lo = hi; | |
3774 } | |
3775 chg = true; | |
3776 } | |
605 | 3777 // Negative length arrays will produce weird intermediate dead fast-path code |
0 | 3778 if (lo > hi) |
366
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|
3779 return TypeInt::ZERO; |
0 | 3780 if (!chg) |
3781 return size; | |
3782 return TypeInt::make(lo, hi, Type::WidenMin); | |
3783 } | |
3784 | |
3785 //-------------------------------cast_to_size---------------------------------- | |
3786 const TypeAryPtr* TypeAryPtr::cast_to_size(const TypeInt* new_size) const { | |
3787 assert(new_size != NULL, ""); | |
366
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3788 new_size = narrow_size_type(new_size); |
0 | 3789 if (new_size == size()) return this; |
12190
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8001107: @Stable annotation for constant folding of lazily evaluated variables
vlivanov
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10278
diff
changeset
|
3790 const TypeAry* new_ary = TypeAry::make(elem(), new_size, is_stable()); |
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|
3791 return make(ptr(), const_oop(), new_ary, klass(), klass_is_exact(), _offset, _instance_id, _speculative, _inline_depth); |
0 | 3792 } |
3793 | |
3794 | |
12190
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3795 //------------------------------cast_to_stable--------------------------------- |
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3796 const TypeAryPtr* TypeAryPtr::cast_to_stable(bool stable, int stable_dimension) const { |
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3797 if (stable_dimension <= 0 || (stable_dimension == 1 && stable == this->is_stable())) |
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3798 return this; |
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3799 |
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3800 const Type* elem = this->elem(); |
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3801 const TypePtr* elem_ptr = elem->make_ptr(); |
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3802 |
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3803 if (stable_dimension > 1 && elem_ptr != NULL && elem_ptr->isa_aryptr()) { |
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3804 // If this is widened from a narrow oop, TypeAry::make will re-narrow it. |
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3805 elem = elem_ptr = elem_ptr->is_aryptr()->cast_to_stable(stable, stable_dimension - 1); |
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3806 } |
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3807 |
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3808 const TypeAry* new_ary = TypeAry::make(elem, size(), stable); |
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3809 |
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3810 return make(ptr(), const_oop(), new_ary, klass(), klass_is_exact(), _offset, _instance_id); |
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3811 } |
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3812 |
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3813 //-----------------------------stable_dimension-------------------------------- |
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3814 int TypeAryPtr::stable_dimension() const { |
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3815 if (!is_stable()) return 0; |
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3816 int dim = 1; |
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3817 const TypePtr* elem_ptr = elem()->make_ptr(); |
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3818 if (elem_ptr != NULL && elem_ptr->isa_aryptr()) |
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3819 dim += elem_ptr->is_aryptr()->stable_dimension(); |
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3820 return dim; |
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3821 } |
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3822 |
0 | 3823 //------------------------------eq--------------------------------------------- |
3824 // Structural equality check for Type representations | |
3825 bool TypeAryPtr::eq( const Type *t ) const { | |
3826 const TypeAryPtr *p = t->is_aryptr(); | |
3827 return | |
3828 _ary == p->_ary && // Check array | |
3829 TypeOopPtr::eq(p); // Check sub-parts | |
3830 } | |
3831 | |
3832 //------------------------------hash------------------------------------------- | |
3833 // Type-specific hashing function. | |
3834 int TypeAryPtr::hash(void) const { | |
3835 return (intptr_t)_ary + TypeOopPtr::hash(); | |
3836 } | |
3837 | |
3838 //------------------------------meet------------------------------------------- | |
3839 // Compute the MEET of two types. It returns a new Type object. | |
12966 | 3840 const Type *TypeAryPtr::xmeet_helper(const Type *t) const { |
0 | 3841 // Perform a fast test for common case; meeting the same types together. |
3842 if( this == t ) return this; // Meeting same type-rep? | |
3843 // Current "this->_base" is Pointer | |
3844 switch (t->base()) { // switch on original type | |
3845 | |
3846 // Mixing ints & oops happens when javac reuses local variables | |
3847 case Int: | |
3848 case Long: | |
3849 case FloatTop: | |
3850 case FloatCon: | |
3851 case FloatBot: | |
3852 case DoubleTop: | |
3853 case DoubleCon: | |
3854 case DoubleBot: | |
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3855 case NarrowOop: |
6848
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3856 case NarrowKlass: |
0 | 3857 case Bottom: // Ye Olde Default |
3858 return Type::BOTTOM; | |
3859 case Top: | |
3860 return this; | |
3861 | |
3862 default: // All else is a mistake | |
3863 typerr(t); | |
3864 | |
3865 case OopPtr: { // Meeting to OopPtrs | |
3866 // Found a OopPtr type vs self-AryPtr type | |
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3867 const TypeOopPtr *tp = t->is_oopptr(); |
0 | 3868 int offset = meet_offset(tp->offset()); |
3869 PTR ptr = meet_ptr(tp->ptr()); | |
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3870 int depth = meet_inline_depth(tp->inline_depth()); |
0 | 3871 switch (tp->ptr()) { |
3872 case TopPTR: | |
223 | 3873 case AnyNull: { |
3874 int instance_id = meet_instance_id(InstanceTop); | |
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3875 const TypeOopPtr* speculative = xmeet_speculative(tp); |
223 | 3876 return make(ptr, (ptr == Constant ? const_oop() : NULL), |
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3877 _ary, _klass, _klass_is_exact, offset, instance_id, speculative, depth); |
223 | 3878 } |
0 | 3879 case BotPTR: |
958
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3880 case NotNull: { |
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3881 int instance_id = meet_instance_id(tp->instance_id()); |
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3882 const TypeOopPtr* speculative = xmeet_speculative(tp); |
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3883 return TypeOopPtr::make(ptr, offset, instance_id, speculative, depth); |
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3884 } |
0 | 3885 default: ShouldNotReachHere(); |
3886 } | |
3887 } | |
3888 | |
3889 case AnyPtr: { // Meeting two AnyPtrs | |
3890 // Found an AnyPtr type vs self-AryPtr type | |
3891 const TypePtr *tp = t->is_ptr(); | |
3892 int offset = meet_offset(tp->offset()); | |
3893 PTR ptr = meet_ptr(tp->ptr()); | |
3894 switch (tp->ptr()) { | |
3895 case TopPTR: | |
3896 return this; | |
3897 case BotPTR: | |
3898 case NotNull: | |
3899 return TypePtr::make(AnyPtr, ptr, offset); | |
3900 case Null: | |
3901 if( ptr == Null ) return TypePtr::make(AnyPtr, ptr, offset); | |
223 | 3902 // else fall through to AnyNull |
3903 case AnyNull: { | |
3904 int instance_id = meet_instance_id(InstanceTop); | |
12966 | 3905 const TypeOopPtr* speculative = _speculative; |
3906 return make(ptr, (ptr == Constant ? const_oop() : NULL), | |
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3907 _ary, _klass, _klass_is_exact, offset, instance_id, speculative, _inline_depth); |
223 | 3908 } |
0 | 3909 default: ShouldNotReachHere(); |
3910 } | |
3911 } | |
3912 | |
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3913 case MetadataPtr: |
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3914 case KlassPtr: |
0 | 3915 case RawPtr: return TypePtr::BOTTOM; |
3916 | |
3917 case AryPtr: { // Meeting 2 references? | |
3918 const TypeAryPtr *tap = t->is_aryptr(); | |
3919 int off = meet_offset(tap->offset()); | |
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3920 const TypeAry *tary = _ary->meet_speculative(tap->_ary)->is_ary(); |
0 | 3921 PTR ptr = meet_ptr(tap->ptr()); |
223 | 3922 int instance_id = meet_instance_id(tap->instance_id()); |
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3923 const TypeOopPtr* speculative = xmeet_speculative(tap); |
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3924 int depth = meet_inline_depth(tap->inline_depth()); |
0 | 3925 ciKlass* lazy_klass = NULL; |
3926 if (tary->_elem->isa_int()) { | |
3927 // Integral array element types have irrelevant lattice relations. | |
3928 // It is the klass that determines array layout, not the element type. | |
3929 if (_klass == NULL) | |
3930 lazy_klass = tap->_klass; | |
3931 else if (tap->_klass == NULL || tap->_klass == _klass) { | |
3932 lazy_klass = _klass; | |
3933 } else { | |
3934 // Something like byte[int+] meets char[int+]. | |
3935 // This must fall to bottom, not (int[-128..65535])[int+]. | |
247 | 3936 instance_id = InstanceBot; |
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3937 tary = TypeAry::make(Type::BOTTOM, tary->_size, tary->_stable); |
0 | 3938 } |
2351 | 3939 } else // Non integral arrays. |
14228 | 3940 // Must fall to bottom if exact klasses in upper lattice |
3941 // are not equal or super klass is exact. | |
3942 if ((above_centerline(ptr) || ptr == Constant) && klass() != tap->klass() && | |
3943 // meet with top[] and bottom[] are processed further down: | |
3944 tap->_klass != NULL && this->_klass != NULL && | |
3945 // both are exact and not equal: | |
3946 ((tap->_klass_is_exact && this->_klass_is_exact) || | |
3947 // 'tap' is exact and super or unrelated: | |
3948 (tap->_klass_is_exact && !tap->klass()->is_subtype_of(klass())) || | |
3949 // 'this' is exact and super or unrelated: | |
3950 (this->_klass_is_exact && !klass()->is_subtype_of(tap->klass())))) { | |
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3951 tary = TypeAry::make(Type::BOTTOM, tary->_size, tary->_stable); |
12966 | 3952 return make(NotNull, NULL, tary, lazy_klass, false, off, InstanceBot); |
0 | 3953 } |
2351 | 3954 |
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3955 bool xk = false; |
0 | 3956 switch (tap->ptr()) { |
3957 case AnyNull: | |
3958 case TopPTR: | |
3959 // Compute new klass on demand, do not use tap->_klass | |
12966 | 3960 if (below_centerline(this->_ptr)) { |
3961 xk = this->_klass_is_exact; | |
3962 } else { | |
3963 xk = (tap->_klass_is_exact | this->_klass_is_exact); | |
3964 } | |
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3965 return make(ptr, const_oop(), tary, lazy_klass, xk, off, instance_id, speculative, depth); |
0 | 3966 case Constant: { |
3967 ciObject* o = const_oop(); | |
3968 if( _ptr == Constant ) { | |
3969 if( tap->const_oop() != NULL && !o->equals(tap->const_oop()) ) { | |
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3970 xk = (klass() == tap->klass()); |
0 | 3971 ptr = NotNull; |
3972 o = NULL; | |
247 | 3973 instance_id = InstanceBot; |
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|
3974 } else { |
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3975 xk = true; |
0 | 3976 } |
12966 | 3977 } else if(above_centerline(_ptr)) { |
0 | 3978 o = tap->const_oop(); |
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|
3979 xk = true; |
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3980 } else { |
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3981 // Only precise for identical arrays |
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3982 xk = this->_klass_is_exact && (klass() == tap->klass()); |
0 | 3983 } |
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3984 return TypeAryPtr::make(ptr, o, tary, lazy_klass, xk, off, instance_id, speculative, depth); |
0 | 3985 } |
3986 case NotNull: | |
3987 case BotPTR: | |
3988 // Compute new klass on demand, do not use tap->_klass | |
3989 if (above_centerline(this->_ptr)) | |
3990 xk = tap->_klass_is_exact; | |
3991 else xk = (tap->_klass_is_exact & this->_klass_is_exact) && | |
3992 (klass() == tap->klass()); // Only precise for identical arrays | |
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3993 return TypeAryPtr::make(ptr, NULL, tary, lazy_klass, xk, off, instance_id, speculative, depth); |
0 | 3994 default: ShouldNotReachHere(); |
3995 } | |
3996 } | |
3997 | |
3998 // All arrays inherit from Object class | |
3999 case InstPtr: { | |
4000 const TypeInstPtr *tp = t->is_instptr(); | |
4001 int offset = meet_offset(tp->offset()); | |
4002 PTR ptr = meet_ptr(tp->ptr()); | |
223 | 4003 int instance_id = meet_instance_id(tp->instance_id()); |
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4004 const TypeOopPtr* speculative = xmeet_speculative(tp); |
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4005 int depth = meet_inline_depth(tp->inline_depth()); |
0 | 4006 switch (ptr) { |
4007 case TopPTR: | |
4008 case AnyNull: // Fall 'down' to dual of object klass | |
12966 | 4009 // For instances when a subclass meets a superclass we fall |
4010 // below the centerline when the superclass is exact. We need to | |
4011 // do the same here. | |
4012 if (tp->klass()->equals(ciEnv::current()->Object_klass()) && !tp->klass_is_exact()) { | |
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4013 return TypeAryPtr::make(ptr, _ary, _klass, _klass_is_exact, offset, instance_id, speculative, depth); |
0 | 4014 } else { |
4015 // cannot subclass, so the meet has to fall badly below the centerline | |
4016 ptr = NotNull; | |
223 | 4017 instance_id = InstanceBot; |
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4018 return TypeInstPtr::make(ptr, ciEnv::current()->Object_klass(), false, NULL,offset, instance_id, speculative, depth); |
0 | 4019 } |
4020 case Constant: | |
4021 case NotNull: | |
4022 case BotPTR: // Fall down to object klass | |
4023 // LCA is object_klass, but if we subclass from the top we can do better | |
4024 if (above_centerline(tp->ptr())) { | |
4025 // If 'tp' is above the centerline and it is Object class | |
605 | 4026 // then we can subclass in the Java class hierarchy. |
12966 | 4027 // For instances when a subclass meets a superclass we fall |
4028 // below the centerline when the superclass is exact. We need | |
4029 // to do the same here. | |
4030 if (tp->klass()->equals(ciEnv::current()->Object_klass()) && !tp->klass_is_exact()) { | |
0 | 4031 // that is, my array type is a subtype of 'tp' klass |
12966 | 4032 return make(ptr, (ptr == Constant ? const_oop() : NULL), |
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4033 _ary, _klass, _klass_is_exact, offset, instance_id, speculative, depth); |
0 | 4034 } |
4035 } | |
4036 // The other case cannot happen, since t cannot be a subtype of an array. | |
4037 // The meet falls down to Object class below centerline. | |
4038 if( ptr == Constant ) | |
4039 ptr = NotNull; | |
223 | 4040 instance_id = InstanceBot; |
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4041 return TypeInstPtr::make(ptr, ciEnv::current()->Object_klass(), false, NULL,offset, instance_id, speculative, depth); |
0 | 4042 default: typerr(t); |
4043 } | |
4044 } | |
4045 } | |
4046 return this; // Lint noise | |
4047 } | |
4048 | |
4049 //------------------------------xdual------------------------------------------ | |
4050 // Dual: compute field-by-field dual | |
4051 const Type *TypeAryPtr::xdual() const { | |
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4052 return new TypeAryPtr(dual_ptr(), _const_oop, _ary->dual()->is_ary(),_klass, _klass_is_exact, dual_offset(), dual_instance_id(), is_autobox_cache(), dual_speculative(), dual_inline_depth()); |
0 | 4053 } |
4054 | |
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|
4055 //----------------------interface_vs_oop--------------------------------------- |
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|
4056 #ifdef ASSERT |
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4057 bool TypeAryPtr::interface_vs_oop(const Type *t) const { |
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4058 const TypeAryPtr* t_aryptr = t->isa_aryptr(); |
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4059 if (t_aryptr) { |
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|
4060 return _ary->interface_vs_oop(t_aryptr->_ary); |
915cc9c5ebc6
6837094: False positive for "meet not symmetric" failure
kvn
parents:
628
diff
changeset
|
4061 } |
915cc9c5ebc6
6837094: False positive for "meet not symmetric" failure
kvn
parents:
628
diff
changeset
|
4062 return false; |
915cc9c5ebc6
6837094: False positive for "meet not symmetric" failure
kvn
parents:
628
diff
changeset
|
4063 } |
915cc9c5ebc6
6837094: False positive for "meet not symmetric" failure
kvn
parents:
628
diff
changeset
|
4064 #endif |
915cc9c5ebc6
6837094: False positive for "meet not symmetric" failure
kvn
parents:
628
diff
changeset
|
4065 |
0 | 4066 //------------------------------dump2------------------------------------------ |
4067 #ifndef PRODUCT | |
4068 void TypeAryPtr::dump2( Dict &d, uint depth, outputStream *st ) const { | |
4069 _ary->dump2(d,depth,st); | |
4070 switch( _ptr ) { | |
4071 case Constant: | |
4072 const_oop()->print(st); | |
4073 break; | |
4074 case BotPTR: | |
4075 if (!WizardMode && !Verbose) { | |
4076 if( _klass_is_exact ) st->print(":exact"); | |
4077 break; | |
4078 } | |
4079 case TopPTR: | |
4080 case AnyNull: | |
4081 case NotNull: | |
4082 st->print(":%s", ptr_msg[_ptr]); | |
4083 if( _klass_is_exact ) st->print(":exact"); | |
4084 break; | |
4085 } | |
4086 | |
64
b8f5ba577b02
6673473: (Escape Analysis) Add the instance's field information to PhiNode
kvn
parents:
0
diff
changeset
|
4087 if( _offset != 0 ) { |
b8f5ba577b02
6673473: (Escape Analysis) Add the instance's field information to PhiNode
kvn
parents:
0
diff
changeset
|
4088 int header_size = objArrayOopDesc::header_size() * wordSize; |
b8f5ba577b02
6673473: (Escape Analysis) Add the instance's field information to PhiNode
kvn
parents:
0
diff
changeset
|
4089 if( _offset == OffsetTop ) st->print("+undefined"); |
b8f5ba577b02
6673473: (Escape Analysis) Add the instance's field information to PhiNode
kvn
parents:
0
diff
changeset
|
4090 else if( _offset == OffsetBot ) st->print("+any"); |
b8f5ba577b02
6673473: (Escape Analysis) Add the instance's field information to PhiNode
kvn
parents:
0
diff
changeset
|
4091 else if( _offset < header_size ) st->print("+%d", _offset); |
b8f5ba577b02
6673473: (Escape Analysis) Add the instance's field information to PhiNode
kvn
parents:
0
diff
changeset
|
4092 else { |
b8f5ba577b02
6673473: (Escape Analysis) Add the instance's field information to PhiNode
kvn
parents:
0
diff
changeset
|
4093 BasicType basic_elem_type = elem()->basic_type(); |
b8f5ba577b02
6673473: (Escape Analysis) Add the instance's field information to PhiNode
kvn
parents:
0
diff
changeset
|
4094 int array_base = arrayOopDesc::base_offset_in_bytes(basic_elem_type); |
b8f5ba577b02
6673473: (Escape Analysis) Add the instance's field information to PhiNode
kvn
parents:
0
diff
changeset
|
4095 int elem_size = type2aelembytes(basic_elem_type); |
b8f5ba577b02
6673473: (Escape Analysis) Add the instance's field information to PhiNode
kvn
parents:
0
diff
changeset
|
4096 st->print("[%d]", (_offset - array_base)/elem_size); |
b8f5ba577b02
6673473: (Escape Analysis) Add the instance's field information to PhiNode
kvn
parents:
0
diff
changeset
|
4097 } |
b8f5ba577b02
6673473: (Escape Analysis) Add the instance's field information to PhiNode
kvn
parents:
0
diff
changeset
|
4098 } |
b8f5ba577b02
6673473: (Escape Analysis) Add the instance's field information to PhiNode
kvn
parents:
0
diff
changeset
|
4099 st->print(" *"); |
223 | 4100 if (_instance_id == InstanceTop) |
4101 st->print(",iid=top"); | |
4102 else if (_instance_id != InstanceBot) | |
0 | 4103 st->print(",iid=%d",_instance_id); |
12966 | 4104 |
14512
484a359ff649
8031754: Type speculation should favor profile data from outermost inlined method
roland
parents:
14495
diff
changeset
|
4105 dump_inline_depth(st); |
12966 | 4106 dump_speculative(st); |
0 | 4107 } |
4108 #endif | |
4109 | |
4110 bool TypeAryPtr::empty(void) const { | |
4111 if (_ary->empty()) return true; | |
4112 return TypeOopPtr::empty(); | |
4113 } | |
4114 | |
4115 //------------------------------add_offset------------------------------------- | |
12966 | 4116 const TypePtr *TypeAryPtr::add_offset(intptr_t offset) const { |
14512
484a359ff649
8031754: Type speculation should favor profile data from outermost inlined method
roland
parents:
14495
diff
changeset
|
4117 return make(_ptr, _const_oop, _ary, _klass, _klass_is_exact, xadd_offset(offset), _instance_id, add_offset_speculative(offset), _inline_depth); |
12966 | 4118 } |
4119 | |
14383
5ec7dace41a6
8027422: assert(_gvn.type(obj)->higher_equal(tjp)) failed: cast_up is no longer needed
roland
parents:
14228
diff
changeset
|
4120 const Type *TypeAryPtr::remove_speculative() const { |
14512
484a359ff649
8031754: Type speculation should favor profile data from outermost inlined method
roland
parents:
14495
diff
changeset
|
4121 if (_speculative == NULL) { |
484a359ff649
8031754: Type speculation should favor profile data from outermost inlined method
roland
parents:
14495
diff
changeset
|
4122 return this; |
484a359ff649
8031754: Type speculation should favor profile data from outermost inlined method
roland
parents:
14495
diff
changeset
|
4123 } |
484a359ff649
8031754: Type speculation should favor profile data from outermost inlined method
roland
parents:
14495
diff
changeset
|
4124 assert(_inline_depth == InlineDepthTop || _inline_depth == InlineDepthBottom, "non speculative type shouldn't have inline depth"); |
484a359ff649
8031754: Type speculation should favor profile data from outermost inlined method
roland
parents:
14495
diff
changeset
|
4125 return make(_ptr, _const_oop, _ary->remove_speculative()->is_ary(), _klass, _klass_is_exact, _offset, _instance_id, NULL, _inline_depth); |
484a359ff649
8031754: Type speculation should favor profile data from outermost inlined method
roland
parents:
14495
diff
changeset
|
4126 } |
484a359ff649
8031754: Type speculation should favor profile data from outermost inlined method
roland
parents:
14495
diff
changeset
|
4127 |
484a359ff649
8031754: Type speculation should favor profile data from outermost inlined method
roland
parents:
14495
diff
changeset
|
4128 const TypeOopPtr *TypeAryPtr::with_inline_depth(int depth) const { |
484a359ff649
8031754: Type speculation should favor profile data from outermost inlined method
roland
parents:
14495
diff
changeset
|
4129 if (!UseInlineDepthForSpeculativeTypes) { |
484a359ff649
8031754: Type speculation should favor profile data from outermost inlined method
roland
parents:
14495
diff
changeset
|
4130 return this; |
484a359ff649
8031754: Type speculation should favor profile data from outermost inlined method
roland
parents:
14495
diff
changeset
|
4131 } |
484a359ff649
8031754: Type speculation should favor profile data from outermost inlined method
roland
parents:
14495
diff
changeset
|
4132 return make(_ptr, _const_oop, _ary->remove_speculative()->is_ary(), _klass, _klass_is_exact, _offset, _instance_id, _speculative, depth); |
12966 | 4133 } |
0 | 4134 |
4135 //============================================================================= | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4136 |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4137 //------------------------------hash------------------------------------------- |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4138 // Type-specific hashing function. |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4139 int TypeNarrowPtr::hash(void) const { |
827
bf3489cc0aa0
6856025: assert(_base >= OopPtr && _base <= KlassPtr,"Not a Java pointer")
never
parents:
820
diff
changeset
|
4140 return _ptrtype->hash() + 7; |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4141 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4142 |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4143 bool TypeNarrowPtr::singleton(void) const { // TRUE if type is a singleton |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4144 return _ptrtype->singleton(); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4145 } |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4146 |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4147 bool TypeNarrowPtr::empty(void) const { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4148 return _ptrtype->empty(); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4149 } |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4150 |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4151 intptr_t TypeNarrowPtr::get_con() const { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4152 return _ptrtype->get_con(); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4153 } |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4154 |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4155 bool TypeNarrowPtr::eq( const Type *t ) const { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4156 const TypeNarrowPtr* tc = isa_same_narrowptr(t); |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4157 if (tc != NULL) { |
827
bf3489cc0aa0
6856025: assert(_base >= OopPtr && _base <= KlassPtr,"Not a Java pointer")
never
parents:
820
diff
changeset
|
4158 if (_ptrtype->base() != tc->_ptrtype->base()) { |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4159 return false; |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4160 } |
827
bf3489cc0aa0
6856025: assert(_base >= OopPtr && _base <= KlassPtr,"Not a Java pointer")
never
parents:
820
diff
changeset
|
4161 return tc->_ptrtype->eq(_ptrtype); |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4162 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4163 return false; |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4164 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4165 |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4166 const Type *TypeNarrowPtr::xdual() const { // Compute dual right now. |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4167 const TypePtr* odual = _ptrtype->dual()->is_ptr(); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4168 return make_same_narrowptr(odual); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4169 } |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4170 |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4171 |
14383
5ec7dace41a6
8027422: assert(_gvn.type(obj)->higher_equal(tjp)) failed: cast_up is no longer needed
roland
parents:
14228
diff
changeset
|
4172 const Type *TypeNarrowPtr::filter_helper(const Type *kills, bool include_speculative) const { |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4173 if (isa_same_narrowptr(kills)) { |
14383
5ec7dace41a6
8027422: assert(_gvn.type(obj)->higher_equal(tjp)) failed: cast_up is no longer needed
roland
parents:
14228
diff
changeset
|
4174 const Type* ft =_ptrtype->filter_helper(is_same_narrowptr(kills)->_ptrtype, include_speculative); |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4175 if (ft->empty()) |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4176 return Type::TOP; // Canonical empty value |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4177 if (ft->isa_ptr()) { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4178 return make_hash_same_narrowptr(ft->isa_ptr()); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4179 } |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4180 return ft; |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4181 } else if (kills->isa_ptr()) { |
14383
5ec7dace41a6
8027422: assert(_gvn.type(obj)->higher_equal(tjp)) failed: cast_up is no longer needed
roland
parents:
14228
diff
changeset
|
4182 const Type* ft = _ptrtype->join_helper(kills, include_speculative); |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4183 if (ft->empty()) |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4184 return Type::TOP; // Canonical empty value |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4185 return ft; |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4186 } else { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4187 return Type::TOP; |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4188 } |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4189 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4190 |
293
c3e045194476
6731641: assert(m->adr_type() == mach->adr_type(),"matcher should not change adr type")
kvn
parents:
247
diff
changeset
|
4191 //------------------------------xmeet------------------------------------------ |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4192 // Compute the MEET of two types. It returns a new Type object. |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4193 const Type *TypeNarrowPtr::xmeet( const Type *t ) const { |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4194 // Perform a fast test for common case; meeting the same types together. |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4195 if( this == t ) return this; // Meeting same type-rep? |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4196 |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4197 if (t->base() == base()) { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4198 const Type* result = _ptrtype->xmeet(t->make_ptr()); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4199 if (result->isa_ptr()) { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4200 return make_hash_same_narrowptr(result->is_ptr()); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4201 } |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4202 return result; |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4203 } |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4204 |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4205 // Current "this->_base" is NarrowKlass or NarrowOop |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4206 switch (t->base()) { // switch on original type |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4207 |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4208 case Int: // Mixing ints & oops happens when javac |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4209 case Long: // reuses local variables |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4210 case FloatTop: |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4211 case FloatCon: |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4212 case FloatBot: |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4213 case DoubleTop: |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4214 case DoubleCon: |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4215 case DoubleBot: |
293
c3e045194476
6731641: assert(m->adr_type() == mach->adr_type(),"matcher should not change adr type")
kvn
parents:
247
diff
changeset
|
4216 case AnyPtr: |
c3e045194476
6731641: assert(m->adr_type() == mach->adr_type(),"matcher should not change adr type")
kvn
parents:
247
diff
changeset
|
4217 case RawPtr: |
c3e045194476
6731641: assert(m->adr_type() == mach->adr_type(),"matcher should not change adr type")
kvn
parents:
247
diff
changeset
|
4218 case OopPtr: |
c3e045194476
6731641: assert(m->adr_type() == mach->adr_type(),"matcher should not change adr type")
kvn
parents:
247
diff
changeset
|
4219 case InstPtr: |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4220 case AryPtr: |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4221 case MetadataPtr: |
293
c3e045194476
6731641: assert(m->adr_type() == mach->adr_type(),"matcher should not change adr type")
kvn
parents:
247
diff
changeset
|
4222 case KlassPtr: |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4223 case NarrowOop: |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4224 case NarrowKlass: |
293
c3e045194476
6731641: assert(m->adr_type() == mach->adr_type(),"matcher should not change adr type")
kvn
parents:
247
diff
changeset
|
4225 |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4226 case Bottom: // Ye Olde Default |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4227 return Type::BOTTOM; |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4228 case Top: |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4229 return this; |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4230 |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4231 default: // All else is a mistake |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4232 typerr(t); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4233 |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4234 } // End of switch |
293
c3e045194476
6731641: assert(m->adr_type() == mach->adr_type(),"matcher should not change adr type")
kvn
parents:
247
diff
changeset
|
4235 |
c3e045194476
6731641: assert(m->adr_type() == mach->adr_type(),"matcher should not change adr type")
kvn
parents:
247
diff
changeset
|
4236 return this; |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4237 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4238 |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4239 #ifndef PRODUCT |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4240 void TypeNarrowPtr::dump2( Dict & d, uint depth, outputStream *st ) const { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4241 _ptrtype->dump2(d, depth, st); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4242 } |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4243 #endif |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4244 |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4245 const TypeNarrowOop *TypeNarrowOop::BOTTOM; |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4246 const TypeNarrowOop *TypeNarrowOop::NULL_PTR; |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4247 |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4248 |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4249 const TypeNarrowOop* TypeNarrowOop::make(const TypePtr* type) { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4250 return (const TypeNarrowOop*)(new TypeNarrowOop(type))->hashcons(); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4251 } |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4252 |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4253 |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4254 #ifndef PRODUCT |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4255 void TypeNarrowOop::dump2( Dict & d, uint depth, outputStream *st ) const { |
417 | 4256 st->print("narrowoop: "); |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4257 TypeNarrowPtr::dump2(d, depth, st); |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4258 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4259 #endif |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4260 |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4261 const TypeNarrowKlass *TypeNarrowKlass::NULL_PTR; |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4262 |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4263 const TypeNarrowKlass* TypeNarrowKlass::make(const TypePtr* type) { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4264 return (const TypeNarrowKlass*)(new TypeNarrowKlass(type))->hashcons(); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4265 } |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4266 |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4267 #ifndef PRODUCT |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4268 void TypeNarrowKlass::dump2( Dict & d, uint depth, outputStream *st ) const { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4269 st->print("narrowklass: "); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4270 TypeNarrowPtr::dump2(d, depth, st); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4271 } |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4272 #endif |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4273 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4274 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4275 //------------------------------eq--------------------------------------------- |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4276 // Structural equality check for Type representations |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4277 bool TypeMetadataPtr::eq( const Type *t ) const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4278 const TypeMetadataPtr *a = (const TypeMetadataPtr*)t; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4279 ciMetadata* one = metadata(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4280 ciMetadata* two = a->metadata(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4281 if (one == NULL || two == NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4282 return (one == two) && TypePtr::eq(t); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4283 } else { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4284 return one->equals(two) && TypePtr::eq(t); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4285 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4286 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4287 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4288 //------------------------------hash------------------------------------------- |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4289 // Type-specific hashing function. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4290 int TypeMetadataPtr::hash(void) const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4291 return |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4292 (metadata() ? metadata()->hash() : 0) + |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4293 TypePtr::hash(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4294 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4295 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4296 //------------------------------singleton-------------------------------------- |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4297 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4298 // constants |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4299 bool TypeMetadataPtr::singleton(void) const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4300 // detune optimizer to not generate constant metadta + constant offset as a constant! |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4301 // TopPTR, Null, AnyNull, Constant are all singletons |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4302 return (_offset == 0) && !below_centerline(_ptr); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4303 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4304 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4305 //------------------------------add_offset------------------------------------- |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4306 const TypePtr *TypeMetadataPtr::add_offset( intptr_t offset ) const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4307 return make( _ptr, _metadata, xadd_offset(offset)); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4308 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4309 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4310 //-----------------------------filter------------------------------------------ |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4311 // Do not allow interface-vs.-noninterface joins to collapse to top. |
14383
5ec7dace41a6
8027422: assert(_gvn.type(obj)->higher_equal(tjp)) failed: cast_up is no longer needed
roland
parents:
14228
diff
changeset
|
4312 const Type *TypeMetadataPtr::filter_helper(const Type *kills, bool include_speculative) const { |
5ec7dace41a6
8027422: assert(_gvn.type(obj)->higher_equal(tjp)) failed: cast_up is no longer needed
roland
parents:
14228
diff
changeset
|
4313 const TypeMetadataPtr* ft = join_helper(kills, include_speculative)->isa_metadataptr(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4314 if (ft == NULL || ft->empty()) |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4315 return Type::TOP; // Canonical empty value |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4316 return ft; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4317 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4318 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4319 //------------------------------get_con---------------------------------------- |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4320 intptr_t TypeMetadataPtr::get_con() const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4321 assert( _ptr == Null || _ptr == Constant, "" ); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4322 assert( _offset >= 0, "" ); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4323 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4324 if (_offset != 0) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4325 // After being ported to the compiler interface, the compiler no longer |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4326 // directly manipulates the addresses of oops. Rather, it only has a pointer |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4327 // to a handle at compile time. This handle is embedded in the generated |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4328 // code and dereferenced at the time the nmethod is made. Until that time, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4329 // it is not reasonable to do arithmetic with the addresses of oops (we don't |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4330 // have access to the addresses!). This does not seem to currently happen, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4331 // but this assertion here is to help prevent its occurence. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4332 tty->print_cr("Found oop constant with non-zero offset"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4333 ShouldNotReachHere(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4334 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4335 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4336 return (intptr_t)metadata()->constant_encoding(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4337 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4338 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4339 //------------------------------cast_to_ptr_type------------------------------- |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4340 const Type *TypeMetadataPtr::cast_to_ptr_type(PTR ptr) const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4341 if( ptr == _ptr ) return this; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4342 return make(ptr, metadata(), _offset); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4343 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4344 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4345 //------------------------------meet------------------------------------------- |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4346 // Compute the MEET of two types. It returns a new Type object. |
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4347 const Type *TypeMetadataPtr::xmeet( const Type *t ) const { |
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4348 // Perform a fast test for common case; meeting the same types together. |
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4349 if( this == t ) return this; // Meeting same type-rep? |
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4350 |
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4351 // Current "this->_base" is OopPtr |
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4352 switch (t->base()) { // switch on original type |
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4353 |
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4354 case Int: // Mixing ints & oops happens when javac |
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4355 case Long: // reuses local variables |
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4356 case FloatTop: |
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4357 case FloatCon: |
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4358 case FloatBot: |
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4359 case DoubleTop: |
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4360 case DoubleCon: |
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4361 case DoubleBot: |
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4362 case NarrowOop: |
6848
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4363 case NarrowKlass: |
6725
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4364 case Bottom: // Ye Olde Default |
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4365 return Type::BOTTOM; |
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4366 case Top: |
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4367 return this; |
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4368 |
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4369 default: // All else is a mistake |
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4370 typerr(t); |
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4371 |
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4372 case AnyPtr: { |
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4373 // Found an AnyPtr type vs self-OopPtr type |
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4374 const TypePtr *tp = t->is_ptr(); |
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4375 int offset = meet_offset(tp->offset()); |
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4376 PTR ptr = meet_ptr(tp->ptr()); |
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4377 switch (tp->ptr()) { |
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4378 case Null: |
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4379 if (ptr == Null) return TypePtr::make(AnyPtr, ptr, offset); |
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4380 // else fall through: |
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4381 case TopPTR: |
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4382 case AnyNull: { |
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4383 return make(ptr, NULL, offset); |
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4384 } |
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4385 case BotPTR: |
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4386 case NotNull: |
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4387 return TypePtr::make(AnyPtr, ptr, offset); |
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4388 default: typerr(t); |
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4389 } |
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4390 } |
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4391 |
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4392 case RawPtr: |
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4393 case KlassPtr: |
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4394 case OopPtr: |
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4395 case InstPtr: |
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4396 case AryPtr: |
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4397 return TypePtr::BOTTOM; // Oop meet raw is not well defined |
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4398 |
6728 | 4399 case MetadataPtr: { |
4400 const TypeMetadataPtr *tp = t->is_metadataptr(); | |
4401 int offset = meet_offset(tp->offset()); | |
4402 PTR tptr = tp->ptr(); | |
4403 PTR ptr = meet_ptr(tptr); | |
4404 ciMetadata* md = (tptr == TopPTR) ? metadata() : tp->metadata(); | |
4405 if (tptr == TopPTR || _ptr == TopPTR || | |
4406 metadata()->equals(tp->metadata())) { | |
4407 return make(ptr, md, offset); | |
4408 } | |
4409 // metadata is different | |
4410 if( ptr == Constant ) { // Cannot be equal constants, so... | |
4411 if( tptr == Constant && _ptr != Constant) return t; | |
4412 if( _ptr == Constant && tptr != Constant) return this; | |
4413 ptr = NotNull; // Fall down in lattice | |
4414 } | |
4415 return make(ptr, NULL, offset); | |
6725
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4416 break; |
6728 | 4417 } |
6725
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4418 } // End of switch |
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4419 return this; // Return the double constant |
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4420 } |
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4421 |
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4422 |
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4423 //------------------------------xdual------------------------------------------ |
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4424 // Dual of a pure metadata pointer. |
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4425 const Type *TypeMetadataPtr::xdual() const { |
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4426 return new TypeMetadataPtr(dual_ptr(), metadata(), dual_offset()); |
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4427 } |
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4428 |
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4429 //------------------------------dump2------------------------------------------ |
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|
4430 #ifndef PRODUCT |
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4431 void TypeMetadataPtr::dump2( Dict &d, uint depth, outputStream *st ) const { |
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4432 st->print("metadataptr:%s", ptr_msg[_ptr]); |
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4433 if( metadata() ) st->print(INTPTR_FORMAT, metadata()); |
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4434 switch( _offset ) { |
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4435 case OffsetTop: st->print("+top"); break; |
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4436 case OffsetBot: st->print("+any"); break; |
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4437 case 0: break; |
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4438 default: st->print("+%d",_offset); break; |
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4439 } |
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4440 } |
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|
4441 #endif |
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4442 |
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4443 |
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4444 //============================================================================= |
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4445 // Convenience common pre-built type. |
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4446 const TypeMetadataPtr *TypeMetadataPtr::BOTTOM; |
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4447 |
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4448 TypeMetadataPtr::TypeMetadataPtr(PTR ptr, ciMetadata* metadata, int offset): |
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4449 TypePtr(MetadataPtr, ptr, offset), _metadata(metadata) { |
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4450 } |
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4451 |
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4452 const TypeMetadataPtr* TypeMetadataPtr::make(ciMethod* m) { |
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4453 return make(Constant, m, 0); |
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4454 } |
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4455 const TypeMetadataPtr* TypeMetadataPtr::make(ciMethodData* m) { |
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4456 return make(Constant, m, 0); |
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4457 } |
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4458 |
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4459 //------------------------------make------------------------------------------- |
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4460 // Create a meta data constant |
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4461 const TypeMetadataPtr *TypeMetadataPtr::make(PTR ptr, ciMetadata* m, int offset) { |
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4462 assert(m == NULL || !m->is_klass(), "wrong type"); |
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4463 return (TypeMetadataPtr*)(new TypeMetadataPtr(ptr, m, offset))->hashcons(); |
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4464 } |
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4465 |
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4466 |
113
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|
4467 //============================================================================= |
0 | 4468 // Convenience common pre-built types. |
4469 | |
4470 // Not-null object klass or below | |
4471 const TypeKlassPtr *TypeKlassPtr::OBJECT; | |
4472 const TypeKlassPtr *TypeKlassPtr::OBJECT_OR_NULL; | |
4473 | |
6725
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4474 //------------------------------TypeKlassPtr----------------------------------- |
0 | 4475 TypeKlassPtr::TypeKlassPtr( PTR ptr, ciKlass* klass, int offset ) |
6725
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4476 : TypePtr(KlassPtr, ptr, offset), _klass(klass), _klass_is_exact(ptr == Constant) { |
0 | 4477 } |
4478 | |
4479 //------------------------------make------------------------------------------- | |
4480 // ptr to klass 'k', if Constant, or possibly to a sub-klass if not a Constant | |
4481 const TypeKlassPtr *TypeKlassPtr::make( PTR ptr, ciKlass* k, int offset ) { | |
4482 assert( k != NULL, "Expect a non-NULL klass"); | |
6725
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4483 assert(k->is_instance_klass() || k->is_array_klass(), "Incorrect type of klass oop"); |
0 | 4484 TypeKlassPtr *r = |
4485 (TypeKlassPtr*)(new TypeKlassPtr(ptr, k, offset))->hashcons(); | |
4486 | |
4487 return r; | |
4488 } | |
4489 | |
4490 //------------------------------eq--------------------------------------------- | |
4491 // Structural equality check for Type representations | |
4492 bool TypeKlassPtr::eq( const Type *t ) const { | |
4493 const TypeKlassPtr *p = t->is_klassptr(); | |
4494 return | |
4495 klass()->equals(p->klass()) && | |
6725
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4496 TypePtr::eq(p); |
0 | 4497 } |
4498 | |
4499 //------------------------------hash------------------------------------------- | |
4500 // Type-specific hashing function. | |
4501 int TypeKlassPtr::hash(void) const { | |
6725
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4502 return klass()->hash() + TypePtr::hash(); |
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4503 } |
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4504 |
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4505 //------------------------------singleton-------------------------------------- |
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4506 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple |
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4507 // constants |
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4508 bool TypeKlassPtr::singleton(void) const { |
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4509 // detune optimizer to not generate constant klass + constant offset as a constant! |
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4510 // TopPTR, Null, AnyNull, Constant are all singletons |
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4511 return (_offset == 0) && !below_centerline(_ptr); |
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4512 } |
0 | 4513 |
13014
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4514 // Do not allow interface-vs.-noninterface joins to collapse to top. |
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4515 const Type *TypeKlassPtr::filter_helper(const Type *kills, bool include_speculative) const { |
13014
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4516 // logic here mirrors the one from TypeOopPtr::filter. See comments |
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4517 // there. |
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4518 const Type* ft = join_helper(kills, include_speculative); |
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4519 const TypeKlassPtr* ftkp = ft->isa_klassptr(); |
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4520 const TypeKlassPtr* ktkp = kills->isa_klassptr(); |
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4521 |
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4522 if (ft->empty()) { |
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4523 if (!empty() && ktkp != NULL && ktkp->klass()->is_loaded() && ktkp->klass()->is_interface()) |
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4524 return kills; // Uplift to interface |
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4525 |
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4526 return Type::TOP; // Canonical empty value |
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4527 } |
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4528 |
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4529 // Interface klass type could be exact in opposite to interface type, |
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4530 // return it here instead of incorrect Constant ptr J/L/Object (6894807). |
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4531 if (ftkp != NULL && ktkp != NULL && |
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4532 ftkp->is_loaded() && ftkp->klass()->is_interface() && |
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4533 !ftkp->klass_is_exact() && // Keep exact interface klass |
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4534 ktkp->is_loaded() && !ktkp->klass()->is_interface()) { |
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4535 return ktkp->cast_to_ptr_type(ftkp->ptr()); |
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4536 } |
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4537 |
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4538 return ft; |
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4539 } |
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4540 |
1761 | 4541 //----------------------compute_klass------------------------------------------ |
4542 // Compute the defining klass for this class | |
4543 ciKlass* TypeAryPtr::compute_klass(DEBUG_ONLY(bool verify)) const { | |
4544 // Compute _klass based on element type. | |
0 | 4545 ciKlass* k_ary = NULL; |
4546 const TypeInstPtr *tinst; | |
4547 const TypeAryPtr *tary; | |
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4548 const Type* el = elem(); |
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4549 if (el->isa_narrowoop()) { |
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4550 el = el->make_ptr(); |
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4551 } |
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4552 |
0 | 4553 // Get element klass |
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4554 if ((tinst = el->isa_instptr()) != NULL) { |
0 | 4555 // Compute array klass from element klass |
4556 k_ary = ciObjArrayKlass::make(tinst->klass()); | |
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4557 } else if ((tary = el->isa_aryptr()) != NULL) { |
0 | 4558 // Compute array klass from element klass |
4559 ciKlass* k_elem = tary->klass(); | |
4560 // If element type is something like bottom[], k_elem will be null. | |
4561 if (k_elem != NULL) | |
4562 k_ary = ciObjArrayKlass::make(k_elem); | |
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4563 } else if ((el->base() == Type::Top) || |
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4564 (el->base() == Type::Bottom)) { |
0 | 4565 // element type of Bottom occurs from meet of basic type |
4566 // and object; Top occurs when doing join on Bottom. | |
4567 // Leave k_ary at NULL. | |
4568 } else { | |
4569 // Cannot compute array klass directly from basic type, | |
4570 // since subtypes of TypeInt all have basic type T_INT. | |
1761 | 4571 #ifdef ASSERT |
4572 if (verify && el->isa_int()) { | |
4573 // Check simple cases when verifying klass. | |
4574 BasicType bt = T_ILLEGAL; | |
4575 if (el == TypeInt::BYTE) { | |
4576 bt = T_BYTE; | |
4577 } else if (el == TypeInt::SHORT) { | |
4578 bt = T_SHORT; | |
4579 } else if (el == TypeInt::CHAR) { | |
4580 bt = T_CHAR; | |
4581 } else if (el == TypeInt::INT) { | |
4582 bt = T_INT; | |
4583 } else { | |
4584 return _klass; // just return specified klass | |
4585 } | |
4586 return ciTypeArrayKlass::make(bt); | |
4587 } | |
4588 #endif | |
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4589 assert(!el->isa_int(), |
0 | 4590 "integral arrays must be pre-equipped with a class"); |
4591 // Compute array klass directly from basic type | |
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4592 k_ary = ciTypeArrayKlass::make(el->basic_type()); |
0 | 4593 } |
1761 | 4594 return k_ary; |
4595 } | |
4596 | |
4597 //------------------------------klass------------------------------------------ | |
4598 // Return the defining klass for this class | |
4599 ciKlass* TypeAryPtr::klass() const { | |
4600 if( _klass ) return _klass; // Return cached value, if possible | |
4601 | |
4602 // Oops, need to compute _klass and cache it | |
4603 ciKlass* k_ary = compute_klass(); | |
0 | 4604 |
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4605 if( this != TypeAryPtr::OOPS && this->dual() != TypeAryPtr::OOPS ) { |
0 | 4606 // The _klass field acts as a cache of the underlying |
4607 // ciKlass for this array type. In order to set the field, | |
4608 // we need to cast away const-ness. | |
4609 // | |
4610 // IMPORTANT NOTE: we *never* set the _klass field for the | |
4611 // type TypeAryPtr::OOPS. This Type is shared between all | |
4612 // active compilations. However, the ciKlass which represents | |
4613 // this Type is *not* shared between compilations, so caching | |
4614 // this value would result in fetching a dangling pointer. | |
4615 // | |
4616 // Recomputing the underlying ciKlass for each request is | |
4617 // a bit less efficient than caching, but calls to | |
4618 // TypeAryPtr::OOPS->klass() are not common enough to matter. | |
4619 ((TypeAryPtr*)this)->_klass = k_ary; | |
163 | 4620 if (UseCompressedOops && k_ary != NULL && k_ary->is_obj_array_klass() && |
4621 _offset != 0 && _offset != arrayOopDesc::length_offset_in_bytes()) { | |
4622 ((TypeAryPtr*)this)->_is_ptr_to_narrowoop = true; | |
4623 } | |
4624 } | |
0 | 4625 return k_ary; |
4626 } | |
4627 | |
4628 | |
4629 //------------------------------add_offset------------------------------------- | |
4630 // Access internals of klass object | |
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4631 const TypePtr *TypeKlassPtr::add_offset( intptr_t offset ) const { |
0 | 4632 return make( _ptr, klass(), xadd_offset(offset) ); |
4633 } | |
4634 | |
4635 //------------------------------cast_to_ptr_type------------------------------- | |
4636 const Type *TypeKlassPtr::cast_to_ptr_type(PTR ptr) const { | |
557
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4637 assert(_base == KlassPtr, "subclass must override cast_to_ptr_type"); |
0 | 4638 if( ptr == _ptr ) return this; |
4639 return make(ptr, _klass, _offset); | |
4640 } | |
4641 | |
4642 | |
4643 //-----------------------------cast_to_exactness------------------------------- | |
4644 const Type *TypeKlassPtr::cast_to_exactness(bool klass_is_exact) const { | |
4645 if( klass_is_exact == _klass_is_exact ) return this; | |
4646 if (!UseExactTypes) return this; | |
4647 return make(klass_is_exact ? Constant : NotNull, _klass, _offset); | |
4648 } | |
4649 | |
4650 | |
4651 //-----------------------------as_instance_type-------------------------------- | |
4652 // Corresponding type for an instance of the given class. | |
4653 // It will be NotNull, and exact if and only if the klass type is exact. | |
4654 const TypeOopPtr* TypeKlassPtr::as_instance_type() const { | |
4655 ciKlass* k = klass(); | |
4656 bool xk = klass_is_exact(); | |
4657 //return TypeInstPtr::make(TypePtr::NotNull, k, xk, NULL, 0); | |
4658 const TypeOopPtr* toop = TypeOopPtr::make_from_klass_raw(k); | |
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4659 guarantee(toop != NULL, "need type for given klass"); |
0 | 4660 toop = toop->cast_to_ptr_type(TypePtr::NotNull)->is_oopptr(); |
4661 return toop->cast_to_exactness(xk)->is_oopptr(); | |
4662 } | |
4663 | |
4664 | |
4665 //------------------------------xmeet------------------------------------------ | |
4666 // Compute the MEET of two types, return a new Type object. | |
4667 const Type *TypeKlassPtr::xmeet( const Type *t ) const { | |
4668 // Perform a fast test for common case; meeting the same types together. | |
4669 if( this == t ) return this; // Meeting same type-rep? | |
4670 | |
4671 // Current "this->_base" is Pointer | |
4672 switch (t->base()) { // switch on original type | |
4673 | |
4674 case Int: // Mixing ints & oops happens when javac | |
4675 case Long: // reuses local variables | |
4676 case FloatTop: | |
4677 case FloatCon: | |
4678 case FloatBot: | |
4679 case DoubleTop: | |
4680 case DoubleCon: | |
4681 case DoubleBot: | |
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4682 case NarrowOop: |
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4683 case NarrowKlass: |
0 | 4684 case Bottom: // Ye Olde Default |
4685 return Type::BOTTOM; | |
4686 case Top: | |
4687 return this; | |
4688 | |
4689 default: // All else is a mistake | |
4690 typerr(t); | |
4691 | |
4692 case AnyPtr: { // Meeting to AnyPtrs | |
4693 // Found an AnyPtr type vs self-KlassPtr type | |
4694 const TypePtr *tp = t->is_ptr(); | |
4695 int offset = meet_offset(tp->offset()); | |
4696 PTR ptr = meet_ptr(tp->ptr()); | |
4697 switch (tp->ptr()) { | |
4698 case TopPTR: | |
4699 return this; | |
4700 case Null: | |
4701 if( ptr == Null ) return TypePtr::make( AnyPtr, ptr, offset ); | |
4702 case AnyNull: | |
4703 return make( ptr, klass(), offset ); | |
4704 case BotPTR: | |
4705 case NotNull: | |
4706 return TypePtr::make(AnyPtr, ptr, offset); | |
4707 default: typerr(t); | |
4708 } | |
4709 } | |
4710 | |
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4711 case RawPtr: |
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4712 case MetadataPtr: |
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4713 case OopPtr: |
0 | 4714 case AryPtr: // Meet with AryPtr |
4715 case InstPtr: // Meet with InstPtr | |
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4716 return TypePtr::BOTTOM; |
0 | 4717 |
4718 // | |
4719 // A-top } | |
4720 // / | \ } Tops | |
4721 // B-top A-any C-top } | |
4722 // | / | \ | } Any-nulls | |
4723 // B-any | C-any } | |
4724 // | | | | |
4725 // B-con A-con C-con } constants; not comparable across classes | |
4726 // | | | | |
4727 // B-not | C-not } | |
4728 // | \ | / | } not-nulls | |
4729 // B-bot A-not C-bot } | |
4730 // \ | / } Bottoms | |
4731 // A-bot } | |
4732 // | |
4733 | |
4734 case KlassPtr: { // Meet two KlassPtr types | |
4735 const TypeKlassPtr *tkls = t->is_klassptr(); | |
4736 int off = meet_offset(tkls->offset()); | |
4737 PTR ptr = meet_ptr(tkls->ptr()); | |
4738 | |
4739 // Check for easy case; klasses are equal (and perhaps not loaded!) | |
4740 // If we have constants, then we created oops so classes are loaded | |
4741 // and we can handle the constants further down. This case handles | |
4742 // not-loaded classes | |
4743 if( ptr != Constant && tkls->klass()->equals(klass()) ) { | |
4744 return make( ptr, klass(), off ); | |
4745 } | |
4746 | |
4747 // Classes require inspection in the Java klass hierarchy. Must be loaded. | |
4748 ciKlass* tkls_klass = tkls->klass(); | |
4749 ciKlass* this_klass = this->klass(); | |
4750 assert( tkls_klass->is_loaded(), "This class should have been loaded."); | |
4751 assert( this_klass->is_loaded(), "This class should have been loaded."); | |
4752 | |
4753 // If 'this' type is above the centerline and is a superclass of the | |
4754 // other, we can treat 'this' as having the same type as the other. | |
4755 if ((above_centerline(this->ptr())) && | |
4756 tkls_klass->is_subtype_of(this_klass)) { | |
4757 this_klass = tkls_klass; | |
4758 } | |
4759 // If 'tinst' type is above the centerline and is a superclass of the | |
4760 // other, we can treat 'tinst' as having the same type as the other. | |
4761 if ((above_centerline(tkls->ptr())) && | |
4762 this_klass->is_subtype_of(tkls_klass)) { | |
4763 tkls_klass = this_klass; | |
4764 } | |
4765 | |
4766 // Check for classes now being equal | |
4767 if (tkls_klass->equals(this_klass)) { | |
4768 // If the klasses are equal, the constants may still differ. Fall to | |
4769 // NotNull if they do (neither constant is NULL; that is a special case | |
4770 // handled elsewhere). | |
4771 if( ptr == Constant ) { | |
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4772 if (this->_ptr == Constant && tkls->_ptr == Constant && |
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4773 this->klass()->equals(tkls->klass())); |
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4774 else if (above_centerline(this->ptr())); |
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4775 else if (above_centerline(tkls->ptr())); |
0 | 4776 else |
4777 ptr = NotNull; | |
4778 } | |
4779 return make( ptr, this_klass, off ); | |
4780 } // Else classes are not equal | |
4781 | |
4782 // Since klasses are different, we require the LCA in the Java | |
4783 // class hierarchy - which means we have to fall to at least NotNull. | |
4784 if( ptr == TopPTR || ptr == AnyNull || ptr == Constant ) | |
4785 ptr = NotNull; | |
4786 // Now we find the LCA of Java classes | |
4787 ciKlass* k = this_klass->least_common_ancestor(tkls_klass); | |
4788 return make( ptr, k, off ); | |
4789 } // End of case KlassPtr | |
4790 | |
4791 } // End of switch | |
4792 return this; // Return the double constant | |
4793 } | |
4794 | |
4795 //------------------------------xdual------------------------------------------ | |
4796 // Dual: compute field-by-field dual | |
4797 const Type *TypeKlassPtr::xdual() const { | |
4798 return new TypeKlassPtr( dual_ptr(), klass(), dual_offset() ); | |
4799 } | |
4800 | |
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4801 //------------------------------get_con---------------------------------------- |
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4802 intptr_t TypeKlassPtr::get_con() const { |
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4803 assert( _ptr == Null || _ptr == Constant, "" ); |
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4804 assert( _offset >= 0, "" ); |
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4805 |
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4806 if (_offset != 0) { |
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4807 // After being ported to the compiler interface, the compiler no longer |
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4808 // directly manipulates the addresses of oops. Rather, it only has a pointer |
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4809 // to a handle at compile time. This handle is embedded in the generated |
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4810 // code and dereferenced at the time the nmethod is made. Until that time, |
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4811 // it is not reasonable to do arithmetic with the addresses of oops (we don't |
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4812 // have access to the addresses!). This does not seem to currently happen, |
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4813 // but this assertion here is to help prevent its occurence. |
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4814 tty->print_cr("Found oop constant with non-zero offset"); |
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4815 ShouldNotReachHere(); |
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4816 } |
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4817 |
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4818 return (intptr_t)klass()->constant_encoding(); |
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4819 } |
0 | 4820 //------------------------------dump2------------------------------------------ |
4821 // Dump Klass Type | |
4822 #ifndef PRODUCT | |
4823 void TypeKlassPtr::dump2( Dict & d, uint depth, outputStream *st ) const { | |
4824 switch( _ptr ) { | |
4825 case Constant: | |
4826 st->print("precise "); | |
4827 case NotNull: | |
4828 { | |
4829 const char *name = klass()->name()->as_utf8(); | |
4830 if( name ) { | |
4831 st->print("klass %s: " INTPTR_FORMAT, name, klass()); | |
4832 } else { | |
4833 ShouldNotReachHere(); | |
4834 } | |
4835 } | |
4836 case BotPTR: | |
4837 if( !WizardMode && !Verbose && !_klass_is_exact ) break; | |
4838 case TopPTR: | |
4839 case AnyNull: | |
4840 st->print(":%s", ptr_msg[_ptr]); | |
4841 if( _klass_is_exact ) st->print(":exact"); | |
4842 break; | |
4843 } | |
4844 | |
4845 if( _offset ) { // Dump offset, if any | |
4846 if( _offset == OffsetBot ) { st->print("+any"); } | |
4847 else if( _offset == OffsetTop ) { st->print("+unknown"); } | |
4848 else { st->print("+%d", _offset); } | |
4849 } | |
4850 | |
4851 st->print(" *"); | |
4852 } | |
4853 #endif | |
4854 | |
4855 | |
4856 | |
4857 //============================================================================= | |
4858 // Convenience common pre-built types. | |
4859 | |
4860 //------------------------------make------------------------------------------- | |
4861 const TypeFunc *TypeFunc::make( const TypeTuple *domain, const TypeTuple *range ) { | |
4862 return (TypeFunc*)(new TypeFunc(domain,range))->hashcons(); | |
4863 } | |
4864 | |
4865 //------------------------------make------------------------------------------- | |
4866 const TypeFunc *TypeFunc::make(ciMethod* method) { | |
4867 Compile* C = Compile::current(); | |
4868 const TypeFunc* tf = C->last_tf(method); // check cache | |
4869 if (tf != NULL) return tf; // The hit rate here is almost 50%. | |
4870 const TypeTuple *domain; | |
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4871 if (method->is_static()) { |
0 | 4872 domain = TypeTuple::make_domain(NULL, method->signature()); |
4873 } else { | |
4874 domain = TypeTuple::make_domain(method->holder(), method->signature()); | |
4875 } | |
4876 const TypeTuple *range = TypeTuple::make_range(method->signature()); | |
4877 tf = TypeFunc::make(domain, range); | |
4878 C->set_last_tf(method, tf); // fill cache | |
4879 return tf; | |
4880 } | |
4881 | |
4882 //------------------------------meet------------------------------------------- | |
4883 // Compute the MEET of two types. It returns a new Type object. | |
4884 const Type *TypeFunc::xmeet( const Type *t ) const { | |
4885 // Perform a fast test for common case; meeting the same types together. | |
4886 if( this == t ) return this; // Meeting same type-rep? | |
4887 | |
4888 // Current "this->_base" is Func | |
4889 switch (t->base()) { // switch on original type | |
4890 | |
4891 case Bottom: // Ye Olde Default | |
4892 return t; | |
4893 | |
4894 default: // All else is a mistake | |
4895 typerr(t); | |
4896 | |
4897 case Top: | |
4898 break; | |
4899 } | |
4900 return this; // Return the double constant | |
4901 } | |
4902 | |
4903 //------------------------------xdual------------------------------------------ | |
4904 // Dual: compute field-by-field dual | |
4905 const Type *TypeFunc::xdual() const { | |
4906 return this; | |
4907 } | |
4908 | |
4909 //------------------------------eq--------------------------------------------- | |
4910 // Structural equality check for Type representations | |
4911 bool TypeFunc::eq( const Type *t ) const { | |
4912 const TypeFunc *a = (const TypeFunc*)t; | |
4913 return _domain == a->_domain && | |
4914 _range == a->_range; | |
4915 } | |
4916 | |
4917 //------------------------------hash------------------------------------------- | |
4918 // Type-specific hashing function. | |
4919 int TypeFunc::hash(void) const { | |
4920 return (intptr_t)_domain + (intptr_t)_range; | |
4921 } | |
4922 | |
4923 //------------------------------dump2------------------------------------------ | |
4924 // Dump Function Type | |
4925 #ifndef PRODUCT | |
4926 void TypeFunc::dump2( Dict &d, uint depth, outputStream *st ) const { | |
4927 if( _range->_cnt <= Parms ) | |
4928 st->print("void"); | |
4929 else { | |
4930 uint i; | |
4931 for (i = Parms; i < _range->_cnt-1; i++) { | |
4932 _range->field_at(i)->dump2(d,depth,st); | |
4933 st->print("/"); | |
4934 } | |
4935 _range->field_at(i)->dump2(d,depth,st); | |
4936 } | |
4937 st->print(" "); | |
4938 st->print("( "); | |
4939 if( !depth || d[this] ) { // Check for recursive dump | |
4940 st->print("...)"); | |
4941 return; | |
4942 } | |
4943 d.Insert((void*)this,(void*)this); // Stop recursion | |
4944 if (Parms < _domain->_cnt) | |
4945 _domain->field_at(Parms)->dump2(d,depth-1,st); | |
4946 for (uint i = Parms+1; i < _domain->_cnt; i++) { | |
4947 st->print(", "); | |
4948 _domain->field_at(i)->dump2(d,depth-1,st); | |
4949 } | |
4950 st->print(" )"); | |
4951 } | |
4952 #endif | |
4953 | |
4954 //------------------------------singleton-------------------------------------- | |
4955 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
4956 // constants (Ldi nodes). Singletons are integer, float or double constants | |
4957 // or a single symbol. | |
4958 bool TypeFunc::singleton(void) const { | |
4959 return false; // Never a singleton | |
4960 } | |
4961 | |
4962 bool TypeFunc::empty(void) const { | |
4963 return false; // Never empty | |
4964 } | |
4965 | |
4966 | |
4967 BasicType TypeFunc::return_type() const{ | |
4968 if (range()->cnt() == TypeFunc::Parms) { | |
4969 return T_VOID; | |
4970 } | |
4971 return range()->field_at(TypeFunc::Parms)->basic_type(); | |
4972 } |