Mercurial > hg > graal-jvmci-8
annotate src/share/vm/opto/type.cpp @ 21984:107b1a534264
Apply JDK-8073670
author | Stefan Anzinger <stefan.anzinger@oracle.com> |
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date | Tue, 16 Jun 2015 11:55:35 +0200 |
parents | 7848fc12602b |
children | 35b153c26783 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2014, 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 | |
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44 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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45 |
0 | 46 // Portions of code courtesy of Clifford Click |
47 | |
48 // Optimization - Graph Style | |
49 | |
50 // Dictionary of types shared among compilations. | |
51 Dict* Type::_shared_type_dict = NULL; | |
52 | |
53 // Array which maps compiler types to Basic Types | |
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54 Type::TypeInfo Type::_type_info[Type::lastype] = { |
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55 { Bad, T_ILLEGAL, "bad", false, Node::NotAMachineReg, relocInfo::none }, // Bad |
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56 { Control, T_ILLEGAL, "control", false, 0, relocInfo::none }, // Control |
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57 { Bottom, T_VOID, "top", false, 0, relocInfo::none }, // Top |
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58 { Bad, T_INT, "int:", false, Op_RegI, relocInfo::none }, // Int |
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59 { Bad, T_LONG, "long:", false, Op_RegL, relocInfo::none }, // Long |
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60 { Half, T_VOID, "half", false, 0, relocInfo::none }, // Half |
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61 { Bad, T_NARROWOOP, "narrowoop:", false, Op_RegN, relocInfo::none }, // NarrowOop |
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62 { Bad, T_NARROWKLASS,"narrowklass:", false, Op_RegN, relocInfo::none }, // NarrowKlass |
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63 { Bad, T_ILLEGAL, "tuple:", false, Node::NotAMachineReg, relocInfo::none }, // Tuple |
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64 { Bad, T_ARRAY, "array:", false, Node::NotAMachineReg, relocInfo::none }, // Array |
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65 |
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66 #ifdef SPARC |
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67 { Bad, T_ILLEGAL, "vectors:", false, 0, relocInfo::none }, // VectorS |
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68 { Bad, T_ILLEGAL, "vectord:", false, Op_RegD, relocInfo::none }, // VectorD |
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69 { Bad, T_ILLEGAL, "vectorx:", false, 0, relocInfo::none }, // VectorX |
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70 { Bad, T_ILLEGAL, "vectory:", false, 0, relocInfo::none }, // VectorY |
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71 #elif defined(PPC64) |
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72 { Bad, T_ILLEGAL, "vectors:", false, 0, relocInfo::none }, // VectorS |
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73 { Bad, T_ILLEGAL, "vectord:", false, Op_RegL, relocInfo::none }, // VectorD |
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74 { Bad, T_ILLEGAL, "vectorx:", false, 0, relocInfo::none }, // VectorX |
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75 { Bad, T_ILLEGAL, "vectory:", false, 0, relocInfo::none }, // VectorY |
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76 #else // all other |
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77 { Bad, T_ILLEGAL, "vectors:", false, Op_VecS, relocInfo::none }, // VectorS |
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78 { Bad, T_ILLEGAL, "vectord:", false, Op_VecD, relocInfo::none }, // VectorD |
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79 { Bad, T_ILLEGAL, "vectorx:", false, Op_VecX, relocInfo::none }, // VectorX |
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80 { Bad, T_ILLEGAL, "vectory:", false, Op_VecY, relocInfo::none }, // VectorY |
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81 #endif |
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82 { Bad, T_ADDRESS, "anyptr:", false, Op_RegP, relocInfo::none }, // AnyPtr |
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83 { Bad, T_ADDRESS, "rawptr:", false, Op_RegP, relocInfo::none }, // RawPtr |
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84 { Bad, T_OBJECT, "oop:", true, Op_RegP, relocInfo::oop_type }, // OopPtr |
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85 { Bad, T_OBJECT, "inst:", true, Op_RegP, relocInfo::oop_type }, // InstPtr |
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86 { Bad, T_OBJECT, "ary:", true, Op_RegP, relocInfo::oop_type }, // AryPtr |
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87 { Bad, T_METADATA, "metadata:", false, Op_RegP, relocInfo::metadata_type }, // MetadataPtr |
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88 { Bad, T_METADATA, "klass:", false, Op_RegP, relocInfo::metadata_type }, // KlassPtr |
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89 { Bad, T_OBJECT, "func", false, 0, relocInfo::none }, // Function |
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90 { Abio, T_ILLEGAL, "abIO", false, 0, relocInfo::none }, // Abio |
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91 { Return_Address, T_ADDRESS, "return_address",false, Op_RegP, relocInfo::none }, // Return_Address |
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92 { Memory, T_ILLEGAL, "memory", false, 0, relocInfo::none }, // Memory |
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93 { FloatBot, T_FLOAT, "float_top", false, Op_RegF, relocInfo::none }, // FloatTop |
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94 { FloatCon, T_FLOAT, "ftcon:", false, Op_RegF, relocInfo::none }, // FloatCon |
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95 { FloatTop, T_FLOAT, "float", false, Op_RegF, relocInfo::none }, // FloatBot |
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96 { DoubleBot, T_DOUBLE, "double_top", false, Op_RegD, relocInfo::none }, // DoubleTop |
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97 { DoubleCon, T_DOUBLE, "dblcon:", false, Op_RegD, relocInfo::none }, // DoubleCon |
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98 { DoubleTop, T_DOUBLE, "double", false, Op_RegD, relocInfo::none }, // DoubleBot |
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99 { Top, T_ILLEGAL, "bottom", false, 0, relocInfo::none } // Bottom |
0 | 100 }; |
101 | |
102 // Map ideal registers (machine types) to ideal types | |
103 const Type *Type::mreg2type[_last_machine_leaf]; | |
104 | |
105 // Map basic types to canonical Type* pointers. | |
106 const Type* Type:: _const_basic_type[T_CONFLICT+1]; | |
107 | |
108 // Map basic types to constant-zero Types. | |
109 const Type* Type:: _zero_type[T_CONFLICT+1]; | |
110 | |
111 // Map basic types to array-body alias types. | |
112 const TypeAryPtr* TypeAryPtr::_array_body_type[T_CONFLICT+1]; | |
113 | |
114 //============================================================================= | |
115 // Convenience common pre-built types. | |
116 const Type *Type::ABIO; // State-of-machine only | |
117 const Type *Type::BOTTOM; // All values | |
118 const Type *Type::CONTROL; // Control only | |
119 const Type *Type::DOUBLE; // All doubles | |
120 const Type *Type::FLOAT; // All floats | |
121 const Type *Type::HALF; // Placeholder half of doublewide type | |
122 const Type *Type::MEMORY; // Abstract store only | |
123 const Type *Type::RETURN_ADDRESS; | |
124 const Type *Type::TOP; // No values in set | |
125 | |
126 //------------------------------get_const_type--------------------------- | |
127 const Type* Type::get_const_type(ciType* type) { | |
128 if (type == NULL) { | |
129 return NULL; | |
130 } else if (type->is_primitive_type()) { | |
131 return get_const_basic_type(type->basic_type()); | |
132 } else { | |
133 return TypeOopPtr::make_from_klass(type->as_klass()); | |
134 } | |
135 } | |
136 | |
137 //---------------------------array_element_basic_type--------------------------------- | |
138 // Mapping to the array element's basic type. | |
139 BasicType Type::array_element_basic_type() const { | |
140 BasicType bt = basic_type(); | |
141 if (bt == T_INT) { | |
142 if (this == TypeInt::INT) return T_INT; | |
143 if (this == TypeInt::CHAR) return T_CHAR; | |
144 if (this == TypeInt::BYTE) return T_BYTE; | |
145 if (this == TypeInt::BOOL) return T_BOOLEAN; | |
146 if (this == TypeInt::SHORT) return T_SHORT; | |
147 return T_VOID; | |
148 } | |
149 return bt; | |
150 } | |
151 | |
152 //---------------------------get_typeflow_type--------------------------------- | |
153 // Import a type produced by ciTypeFlow. | |
154 const Type* Type::get_typeflow_type(ciType* type) { | |
155 switch (type->basic_type()) { | |
156 | |
157 case ciTypeFlow::StateVector::T_BOTTOM: | |
158 assert(type == ciTypeFlow::StateVector::bottom_type(), ""); | |
159 return Type::BOTTOM; | |
160 | |
161 case ciTypeFlow::StateVector::T_TOP: | |
162 assert(type == ciTypeFlow::StateVector::top_type(), ""); | |
163 return Type::TOP; | |
164 | |
165 case ciTypeFlow::StateVector::T_NULL: | |
166 assert(type == ciTypeFlow::StateVector::null_type(), ""); | |
167 return TypePtr::NULL_PTR; | |
168 | |
169 case ciTypeFlow::StateVector::T_LONG2: | |
170 // The ciTypeFlow pass pushes a long, then the half. | |
171 // We do the same. | |
172 assert(type == ciTypeFlow::StateVector::long2_type(), ""); | |
173 return TypeInt::TOP; | |
174 | |
175 case ciTypeFlow::StateVector::T_DOUBLE2: | |
176 // The ciTypeFlow pass pushes double, then the half. | |
177 // Our convention is the same. | |
178 assert(type == ciTypeFlow::StateVector::double2_type(), ""); | |
179 return Type::TOP; | |
180 | |
181 case T_ADDRESS: | |
182 assert(type->is_return_address(), ""); | |
183 return TypeRawPtr::make((address)(intptr_t)type->as_return_address()->bci()); | |
184 | |
185 default: | |
186 // make sure we did not mix up the cases: | |
187 assert(type != ciTypeFlow::StateVector::bottom_type(), ""); | |
188 assert(type != ciTypeFlow::StateVector::top_type(), ""); | |
189 assert(type != ciTypeFlow::StateVector::null_type(), ""); | |
190 assert(type != ciTypeFlow::StateVector::long2_type(), ""); | |
191 assert(type != ciTypeFlow::StateVector::double2_type(), ""); | |
192 assert(!type->is_return_address(), ""); | |
193 | |
194 return Type::get_const_type(type); | |
195 } | |
196 } | |
197 | |
198 | |
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199 //-----------------------make_from_constant------------------------------------ |
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200 const Type* Type::make_from_constant(ciConstant constant, |
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201 bool require_constant, bool is_autobox_cache) { |
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202 switch (constant.basic_type()) { |
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203 case T_BOOLEAN: return TypeInt::make(constant.as_boolean()); |
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204 case T_CHAR: return TypeInt::make(constant.as_char()); |
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205 case T_BYTE: return TypeInt::make(constant.as_byte()); |
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206 case T_SHORT: return TypeInt::make(constant.as_short()); |
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207 case T_INT: return TypeInt::make(constant.as_int()); |
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208 case T_LONG: return TypeLong::make(constant.as_long()); |
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209 case T_FLOAT: return TypeF::make(constant.as_float()); |
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210 case T_DOUBLE: return TypeD::make(constant.as_double()); |
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211 case T_ARRAY: |
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212 case T_OBJECT: |
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213 { |
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214 // cases: |
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215 // can_be_constant = (oop not scavengable || ScavengeRootsInCode != 0) |
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216 // should_be_constant = (oop not scavengable || ScavengeRootsInCode >= 2) |
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217 // An oop is not scavengable if it is in the perm gen. |
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218 ciObject* oop_constant = constant.as_object(); |
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219 if (oop_constant->is_null_object()) { |
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220 return Type::get_zero_type(T_OBJECT); |
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221 } else if (require_constant || oop_constant->should_be_constant()) { |
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222 return TypeOopPtr::make_from_constant(oop_constant, require_constant, is_autobox_cache); |
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223 } |
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224 } |
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225 } |
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226 // Fall through to failure |
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227 return NULL; |
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228 } |
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229 |
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230 |
0 | 231 //------------------------------make------------------------------------------- |
232 // Create a simple Type, with default empty symbol sets. Then hashcons it | |
233 // and look for an existing copy in the type dictionary. | |
234 const Type *Type::make( enum TYPES t ) { | |
235 return (new Type(t))->hashcons(); | |
236 } | |
223 | 237 |
0 | 238 //------------------------------cmp-------------------------------------------- |
239 int Type::cmp( const Type *const t1, const Type *const t2 ) { | |
240 if( t1->_base != t2->_base ) | |
241 return 1; // Missed badly | |
242 assert(t1 != t2 || t1->eq(t2), "eq must be reflexive"); | |
243 return !t1->eq(t2); // Return ZERO if equal | |
244 } | |
245 | |
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246 const Type* Type::maybe_remove_speculative(bool include_speculative) const { |
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247 if (!include_speculative) { |
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248 return remove_speculative(); |
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249 } |
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250 return this; |
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251 } |
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252 |
0 | 253 //------------------------------hash------------------------------------------- |
254 int Type::uhash( const Type *const t ) { | |
255 return t->hash(); | |
256 } | |
257 | |
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258 #define SMALLINT ((juint)3) // a value too insignificant to consider widening |
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259 |
0 | 260 //--------------------------Initialize_shared---------------------------------- |
261 void Type::Initialize_shared(Compile* current) { | |
262 // This method does not need to be locked because the first system | |
263 // compilations (stub compilations) occur serially. If they are | |
264 // changed to proceed in parallel, then this section will need | |
265 // locking. | |
266 | |
267 Arena* save = current->type_arena(); | |
20360 | 268 Arena* shared_type_arena = new (mtCompiler)Arena(mtCompiler); |
0 | 269 |
270 current->set_type_arena(shared_type_arena); | |
271 _shared_type_dict = | |
272 new (shared_type_arena) Dict( (CmpKey)Type::cmp, (Hash)Type::uhash, | |
273 shared_type_arena, 128 ); | |
274 current->set_type_dict(_shared_type_dict); | |
275 | |
276 // Make shared pre-built types. | |
277 CONTROL = make(Control); // Control only | |
278 TOP = make(Top); // No values in set | |
279 MEMORY = make(Memory); // Abstract store only | |
280 ABIO = make(Abio); // State-of-machine only | |
281 RETURN_ADDRESS=make(Return_Address); | |
282 FLOAT = make(FloatBot); // All floats | |
283 DOUBLE = make(DoubleBot); // All doubles | |
284 BOTTOM = make(Bottom); // Everything | |
285 HALF = make(Half); // Placeholder half of doublewide type | |
286 | |
287 TypeF::ZERO = TypeF::make(0.0); // Float 0 (positive zero) | |
288 TypeF::ONE = TypeF::make(1.0); // Float 1 | |
289 | |
290 TypeD::ZERO = TypeD::make(0.0); // Double 0 (positive zero) | |
291 TypeD::ONE = TypeD::make(1.0); // Double 1 | |
292 | |
293 TypeInt::MINUS_1 = TypeInt::make(-1); // -1 | |
294 TypeInt::ZERO = TypeInt::make( 0); // 0 | |
295 TypeInt::ONE = TypeInt::make( 1); // 1 | |
296 TypeInt::BOOL = TypeInt::make(0,1, WidenMin); // 0 or 1, FALSE or TRUE. | |
297 TypeInt::CC = TypeInt::make(-1, 1, WidenMin); // -1, 0 or 1, condition codes | |
298 TypeInt::CC_LT = TypeInt::make(-1,-1, WidenMin); // == TypeInt::MINUS_1 | |
299 TypeInt::CC_GT = TypeInt::make( 1, 1, WidenMin); // == TypeInt::ONE | |
300 TypeInt::CC_EQ = TypeInt::make( 0, 0, WidenMin); // == TypeInt::ZERO | |
301 TypeInt::CC_LE = TypeInt::make(-1, 0, WidenMin); | |
302 TypeInt::CC_GE = TypeInt::make( 0, 1, WidenMin); // == TypeInt::BOOL | |
303 TypeInt::BYTE = TypeInt::make(-128,127, WidenMin); // Bytes | |
624 | 304 TypeInt::UBYTE = TypeInt::make(0, 255, WidenMin); // Unsigned Bytes |
0 | 305 TypeInt::CHAR = TypeInt::make(0,65535, WidenMin); // Java chars |
306 TypeInt::SHORT = TypeInt::make(-32768,32767, WidenMin); // Java shorts | |
307 TypeInt::POS = TypeInt::make(0,max_jint, WidenMin); // Non-neg values | |
308 TypeInt::POS1 = TypeInt::make(1,max_jint, WidenMin); // Positive values | |
309 TypeInt::INT = TypeInt::make(min_jint,max_jint, WidenMax); // 32-bit integers | |
310 TypeInt::SYMINT = TypeInt::make(-max_jint,max_jint,WidenMin); // symmetric range | |
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311 TypeInt::TYPE_DOMAIN = TypeInt::INT; |
0 | 312 // CmpL is overloaded both as the bytecode computation returning |
313 // a trinary (-1,0,+1) integer result AND as an efficient long | |
314 // compare returning optimizer ideal-type flags. | |
315 assert( TypeInt::CC_LT == TypeInt::MINUS_1, "types must match for CmpL to work" ); | |
316 assert( TypeInt::CC_GT == TypeInt::ONE, "types must match for CmpL to work" ); | |
317 assert( TypeInt::CC_EQ == TypeInt::ZERO, "types must match for CmpL to work" ); | |
318 assert( TypeInt::CC_GE == TypeInt::BOOL, "types must match for CmpL to work" ); | |
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319 assert( (juint)(TypeInt::CC->_hi - TypeInt::CC->_lo) <= SMALLINT, "CC is truly small"); |
0 | 320 |
321 TypeLong::MINUS_1 = TypeLong::make(-1); // -1 | |
322 TypeLong::ZERO = TypeLong::make( 0); // 0 | |
323 TypeLong::ONE = TypeLong::make( 1); // 1 | |
324 TypeLong::POS = TypeLong::make(0,max_jlong, WidenMin); // Non-neg values | |
325 TypeLong::LONG = TypeLong::make(min_jlong,max_jlong,WidenMax); // 64-bit integers | |
326 TypeLong::INT = TypeLong::make((jlong)min_jint,(jlong)max_jint,WidenMin); | |
327 TypeLong::UINT = TypeLong::make(0,(jlong)max_juint,WidenMin); | |
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328 TypeLong::TYPE_DOMAIN = TypeLong::LONG; |
0 | 329 |
330 const Type **fboth =(const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*)); | |
331 fboth[0] = Type::CONTROL; | |
332 fboth[1] = Type::CONTROL; | |
333 TypeTuple::IFBOTH = TypeTuple::make( 2, fboth ); | |
334 | |
335 const Type **ffalse =(const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*)); | |
336 ffalse[0] = Type::CONTROL; | |
337 ffalse[1] = Type::TOP; | |
338 TypeTuple::IFFALSE = TypeTuple::make( 2, ffalse ); | |
339 | |
340 const Type **fneither =(const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*)); | |
341 fneither[0] = Type::TOP; | |
342 fneither[1] = Type::TOP; | |
343 TypeTuple::IFNEITHER = TypeTuple::make( 2, fneither ); | |
344 | |
345 const Type **ftrue =(const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*)); | |
346 ftrue[0] = Type::TOP; | |
347 ftrue[1] = Type::CONTROL; | |
348 TypeTuple::IFTRUE = TypeTuple::make( 2, ftrue ); | |
349 | |
350 const Type **floop =(const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*)); | |
351 floop[0] = Type::CONTROL; | |
352 floop[1] = TypeInt::INT; | |
353 TypeTuple::LOOPBODY = TypeTuple::make( 2, floop ); | |
354 | |
355 TypePtr::NULL_PTR= TypePtr::make( AnyPtr, TypePtr::Null, 0 ); | |
356 TypePtr::NOTNULL = TypePtr::make( AnyPtr, TypePtr::NotNull, OffsetBot ); | |
357 TypePtr::BOTTOM = TypePtr::make( AnyPtr, TypePtr::BotPTR, OffsetBot ); | |
358 | |
359 TypeRawPtr::BOTTOM = TypeRawPtr::make( TypePtr::BotPTR ); | |
360 TypeRawPtr::NOTNULL= TypeRawPtr::make( TypePtr::NotNull ); | |
361 | |
362 const Type **fmembar = TypeTuple::fields(0); | |
363 TypeTuple::MEMBAR = TypeTuple::make(TypeFunc::Parms+0, fmembar); | |
364 | |
365 const Type **fsc = (const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*)); | |
366 fsc[0] = TypeInt::CC; | |
367 fsc[1] = Type::MEMORY; | |
368 TypeTuple::STORECONDITIONAL = TypeTuple::make(2, fsc); | |
369 | |
370 TypeInstPtr::NOTNULL = TypeInstPtr::make(TypePtr::NotNull, current->env()->Object_klass()); | |
371 TypeInstPtr::BOTTOM = TypeInstPtr::make(TypePtr::BotPTR, current->env()->Object_klass()); | |
372 TypeInstPtr::MIRROR = TypeInstPtr::make(TypePtr::NotNull, current->env()->Class_klass()); | |
373 TypeInstPtr::MARK = TypeInstPtr::make(TypePtr::BotPTR, current->env()->Object_klass(), | |
374 false, 0, oopDesc::mark_offset_in_bytes()); | |
375 TypeInstPtr::KLASS = TypeInstPtr::make(TypePtr::BotPTR, current->env()->Object_klass(), | |
376 false, 0, oopDesc::klass_offset_in_bytes()); | |
12966 | 377 TypeOopPtr::BOTTOM = TypeOopPtr::make(TypePtr::BotPTR, OffsetBot, TypeOopPtr::InstanceBot, NULL); |
0 | 378 |
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379 TypeMetadataPtr::BOTTOM = TypeMetadataPtr::make(TypePtr::BotPTR, NULL, OffsetBot); |
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380 |
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381 TypeNarrowOop::NULL_PTR = TypeNarrowOop::make( TypePtr::NULL_PTR ); |
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382 TypeNarrowOop::BOTTOM = TypeNarrowOop::make( TypeInstPtr::BOTTOM ); |
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383 |
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384 TypeNarrowKlass::NULL_PTR = TypeNarrowKlass::make( TypePtr::NULL_PTR ); |
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385 |
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386 mreg2type[Op_Node] = Type::BOTTOM; |
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387 mreg2type[Op_Set ] = 0; |
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388 mreg2type[Op_RegN] = TypeNarrowOop::BOTTOM; |
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389 mreg2type[Op_RegI] = TypeInt::INT; |
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390 mreg2type[Op_RegP] = TypePtr::BOTTOM; |
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391 mreg2type[Op_RegF] = Type::FLOAT; |
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392 mreg2type[Op_RegD] = Type::DOUBLE; |
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393 mreg2type[Op_RegL] = TypeLong::LONG; |
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394 mreg2type[Op_RegFlags] = TypeInt::CC; |
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395 |
1761 | 396 TypeAryPtr::RANGE = TypeAryPtr::make( TypePtr::BotPTR, TypeAry::make(Type::BOTTOM,TypeInt::POS), NULL /* current->env()->Object_klass() */, false, arrayOopDesc::length_offset_in_bytes()); |
163 | 397 |
398 TypeAryPtr::NARROWOOPS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeNarrowOop::BOTTOM, TypeInt::POS), NULL /*ciArrayKlass::make(o)*/, false, Type::OffsetBot); | |
399 | |
400 #ifdef _LP64 | |
401 if (UseCompressedOops) { | |
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402 assert(TypeAryPtr::NARROWOOPS->is_ptr_to_narrowoop(), "array of narrow oops must be ptr to narrow oop"); |
163 | 403 TypeAryPtr::OOPS = TypeAryPtr::NARROWOOPS; |
404 } else | |
405 #endif | |
406 { | |
407 // There is no shared klass for Object[]. See note in TypeAryPtr::klass(). | |
408 TypeAryPtr::OOPS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInstPtr::BOTTOM,TypeInt::POS), NULL /*ciArrayKlass::make(o)*/, false, Type::OffsetBot); | |
409 } | |
0 | 410 TypeAryPtr::BYTES = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::BYTE ,TypeInt::POS), ciTypeArrayKlass::make(T_BYTE), true, Type::OffsetBot); |
411 TypeAryPtr::SHORTS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::SHORT ,TypeInt::POS), ciTypeArrayKlass::make(T_SHORT), true, Type::OffsetBot); | |
412 TypeAryPtr::CHARS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::CHAR ,TypeInt::POS), ciTypeArrayKlass::make(T_CHAR), true, Type::OffsetBot); | |
413 TypeAryPtr::INTS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::INT ,TypeInt::POS), ciTypeArrayKlass::make(T_INT), true, Type::OffsetBot); | |
414 TypeAryPtr::LONGS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeLong::LONG ,TypeInt::POS), ciTypeArrayKlass::make(T_LONG), true, Type::OffsetBot); | |
415 TypeAryPtr::FLOATS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(Type::FLOAT ,TypeInt::POS), ciTypeArrayKlass::make(T_FLOAT), true, Type::OffsetBot); | |
416 TypeAryPtr::DOUBLES = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(Type::DOUBLE ,TypeInt::POS), ciTypeArrayKlass::make(T_DOUBLE), true, Type::OffsetBot); | |
417 | |
163 | 418 // Nobody should ask _array_body_type[T_NARROWOOP]. Use NULL as assert. |
419 TypeAryPtr::_array_body_type[T_NARROWOOP] = NULL; | |
0 | 420 TypeAryPtr::_array_body_type[T_OBJECT] = TypeAryPtr::OOPS; |
163 | 421 TypeAryPtr::_array_body_type[T_ARRAY] = TypeAryPtr::OOPS; // arrays are stored in oop arrays |
0 | 422 TypeAryPtr::_array_body_type[T_BYTE] = TypeAryPtr::BYTES; |
423 TypeAryPtr::_array_body_type[T_BOOLEAN] = TypeAryPtr::BYTES; // boolean[] is a byte array | |
424 TypeAryPtr::_array_body_type[T_SHORT] = TypeAryPtr::SHORTS; | |
425 TypeAryPtr::_array_body_type[T_CHAR] = TypeAryPtr::CHARS; | |
426 TypeAryPtr::_array_body_type[T_INT] = TypeAryPtr::INTS; | |
427 TypeAryPtr::_array_body_type[T_LONG] = TypeAryPtr::LONGS; | |
428 TypeAryPtr::_array_body_type[T_FLOAT] = TypeAryPtr::FLOATS; | |
429 TypeAryPtr::_array_body_type[T_DOUBLE] = TypeAryPtr::DOUBLES; | |
430 | |
431 TypeKlassPtr::OBJECT = TypeKlassPtr::make( TypePtr::NotNull, current->env()->Object_klass(), 0 ); | |
432 TypeKlassPtr::OBJECT_OR_NULL = TypeKlassPtr::make( TypePtr::BotPTR, current->env()->Object_klass(), 0 ); | |
433 | |
434 const Type **fi2c = TypeTuple::fields(2); | |
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435 fi2c[TypeFunc::Parms+0] = TypeInstPtr::BOTTOM; // Method* |
0 | 436 fi2c[TypeFunc::Parms+1] = TypeRawPtr::BOTTOM; // argument pointer |
437 TypeTuple::START_I2C = TypeTuple::make(TypeFunc::Parms+2, fi2c); | |
438 | |
439 const Type **intpair = TypeTuple::fields(2); | |
440 intpair[0] = TypeInt::INT; | |
441 intpair[1] = TypeInt::INT; | |
442 TypeTuple::INT_PAIR = TypeTuple::make(2, intpair); | |
443 | |
444 const Type **longpair = TypeTuple::fields(2); | |
445 longpair[0] = TypeLong::LONG; | |
446 longpair[1] = TypeLong::LONG; | |
447 TypeTuple::LONG_PAIR = TypeTuple::make(2, longpair); | |
448 | |
12323 | 449 const Type **intccpair = TypeTuple::fields(2); |
450 intccpair[0] = TypeInt::INT; | |
451 intccpair[1] = TypeInt::CC; | |
452 TypeTuple::INT_CC_PAIR = TypeTuple::make(2, intccpair); | |
453 | |
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454 const Type **longccpair = TypeTuple::fields(2); |
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455 longccpair[0] = TypeLong::LONG; |
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456 longccpair[1] = TypeInt::CC; |
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457 TypeTuple::LONG_CC_PAIR = TypeTuple::make(2, longccpair); |
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458 |
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459 _const_basic_type[T_NARROWOOP] = TypeNarrowOop::BOTTOM; |
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460 _const_basic_type[T_NARROWKLASS] = Type::BOTTOM; |
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461 _const_basic_type[T_BOOLEAN] = TypeInt::BOOL; |
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462 _const_basic_type[T_CHAR] = TypeInt::CHAR; |
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463 _const_basic_type[T_BYTE] = TypeInt::BYTE; |
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464 _const_basic_type[T_SHORT] = TypeInt::SHORT; |
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465 _const_basic_type[T_INT] = TypeInt::INT; |
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466 _const_basic_type[T_LONG] = TypeLong::LONG; |
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467 _const_basic_type[T_FLOAT] = Type::FLOAT; |
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468 _const_basic_type[T_DOUBLE] = Type::DOUBLE; |
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469 _const_basic_type[T_OBJECT] = TypeInstPtr::BOTTOM; |
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470 _const_basic_type[T_ARRAY] = TypeInstPtr::BOTTOM; // there is no separate bottom for arrays |
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471 _const_basic_type[T_VOID] = TypePtr::NULL_PTR; // reflection represents void this way |
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472 _const_basic_type[T_ADDRESS] = TypeRawPtr::BOTTOM; // both interpreter return addresses & random raw ptrs |
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473 _const_basic_type[T_CONFLICT] = Type::BOTTOM; // why not? |
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474 |
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475 _zero_type[T_NARROWOOP] = TypeNarrowOop::NULL_PTR; |
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476 _zero_type[T_NARROWKLASS] = TypeNarrowKlass::NULL_PTR; |
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477 _zero_type[T_BOOLEAN] = TypeInt::ZERO; // false == 0 |
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478 _zero_type[T_CHAR] = TypeInt::ZERO; // '\0' == 0 |
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479 _zero_type[T_BYTE] = TypeInt::ZERO; // 0x00 == 0 |
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480 _zero_type[T_SHORT] = TypeInt::ZERO; // 0x0000 == 0 |
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481 _zero_type[T_INT] = TypeInt::ZERO; |
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482 _zero_type[T_LONG] = TypeLong::ZERO; |
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483 _zero_type[T_FLOAT] = TypeF::ZERO; |
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484 _zero_type[T_DOUBLE] = TypeD::ZERO; |
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485 _zero_type[T_OBJECT] = TypePtr::NULL_PTR; |
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486 _zero_type[T_ARRAY] = TypePtr::NULL_PTR; // null array is null oop |
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487 _zero_type[T_ADDRESS] = TypePtr::NULL_PTR; // raw pointers use the same null |
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488 _zero_type[T_VOID] = Type::TOP; // the only void value is no value at all |
0 | 489 |
490 // get_zero_type() should not happen for T_CONFLICT | |
491 _zero_type[T_CONFLICT]= NULL; | |
492 | |
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493 // Vector predefined types, it needs initialized _const_basic_type[]. |
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494 if (Matcher::vector_size_supported(T_BYTE,4)) { |
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495 TypeVect::VECTS = TypeVect::make(T_BYTE,4); |
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496 } |
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497 if (Matcher::vector_size_supported(T_FLOAT,2)) { |
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498 TypeVect::VECTD = TypeVect::make(T_FLOAT,2); |
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499 } |
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500 if (Matcher::vector_size_supported(T_FLOAT,4)) { |
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501 TypeVect::VECTX = TypeVect::make(T_FLOAT,4); |
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502 } |
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503 if (Matcher::vector_size_supported(T_FLOAT,8)) { |
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504 TypeVect::VECTY = TypeVect::make(T_FLOAT,8); |
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505 } |
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506 mreg2type[Op_VecS] = TypeVect::VECTS; |
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507 mreg2type[Op_VecD] = TypeVect::VECTD; |
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508 mreg2type[Op_VecX] = TypeVect::VECTX; |
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509 mreg2type[Op_VecY] = TypeVect::VECTY; |
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510 |
0 | 511 // Restore working type arena. |
512 current->set_type_arena(save); | |
513 current->set_type_dict(NULL); | |
514 } | |
515 | |
516 //------------------------------Initialize------------------------------------- | |
517 void Type::Initialize(Compile* current) { | |
518 assert(current->type_arena() != NULL, "must have created type arena"); | |
519 | |
520 if (_shared_type_dict == NULL) { | |
521 Initialize_shared(current); | |
522 } | |
523 | |
524 Arena* type_arena = current->type_arena(); | |
525 | |
526 // Create the hash-cons'ing dictionary with top-level storage allocation | |
527 Dict *tdic = new (type_arena) Dict( (CmpKey)Type::cmp,(Hash)Type::uhash, type_arena, 128 ); | |
528 current->set_type_dict(tdic); | |
529 | |
530 // Transfer the shared types. | |
531 DictI i(_shared_type_dict); | |
532 for( ; i.test(); ++i ) { | |
533 Type* t = (Type*)i._value; | |
534 tdic->Insert(t,t); // New Type, insert into Type table | |
535 } | |
536 } | |
537 | |
538 //------------------------------hashcons--------------------------------------- | |
539 // Do the hash-cons trick. If the Type already exists in the type table, | |
540 // delete the current Type and return the existing Type. Otherwise stick the | |
541 // current Type in the Type table. | |
542 const Type *Type::hashcons(void) { | |
543 debug_only(base()); // Check the assertion in Type::base(). | |
544 // Look up the Type in the Type dictionary | |
545 Dict *tdic = type_dict(); | |
546 Type* old = (Type*)(tdic->Insert(this, this, false)); | |
547 if( old ) { // Pre-existing Type? | |
548 if( old != this ) // Yes, this guy is not the pre-existing? | |
549 delete this; // Yes, Nuke this guy | |
550 assert( old->_dual, "" ); | |
551 return old; // Return pre-existing | |
552 } | |
553 | |
554 // Every type has a dual (to make my lattice symmetric). | |
555 // Since we just discovered a new Type, compute its dual right now. | |
556 assert( !_dual, "" ); // No dual yet | |
557 _dual = xdual(); // Compute the dual | |
558 if( cmp(this,_dual)==0 ) { // Handle self-symmetric | |
559 _dual = this; | |
560 return this; | |
561 } | |
562 assert( !_dual->_dual, "" ); // No reverse dual yet | |
563 assert( !(*tdic)[_dual], "" ); // Dual not in type system either | |
564 // New Type, insert into Type table | |
565 tdic->Insert((void*)_dual,(void*)_dual); | |
566 ((Type*)_dual)->_dual = this; // Finish up being symmetric | |
567 #ifdef ASSERT | |
568 Type *dual_dual = (Type*)_dual->xdual(); | |
569 assert( eq(dual_dual), "xdual(xdual()) should be identity" ); | |
570 delete dual_dual; | |
571 #endif | |
572 return this; // Return new Type | |
573 } | |
574 | |
575 //------------------------------eq--------------------------------------------- | |
576 // Structural equality check for Type representations | |
577 bool Type::eq( const Type * ) const { | |
578 return true; // Nothing else can go wrong | |
579 } | |
580 | |
581 //------------------------------hash------------------------------------------- | |
582 // Type-specific hashing function. | |
583 int Type::hash(void) const { | |
584 return _base; | |
585 } | |
586 | |
587 //------------------------------is_finite-------------------------------------- | |
588 // Has a finite value | |
589 bool Type::is_finite() const { | |
590 return false; | |
591 } | |
592 | |
593 //------------------------------is_nan----------------------------------------- | |
594 // Is not a number (NaN) | |
595 bool Type::is_nan() const { | |
596 return false; | |
597 } | |
598 | |
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599 //----------------------interface_vs_oop--------------------------------------- |
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600 #ifdef ASSERT |
12966 | 601 bool Type::interface_vs_oop_helper(const Type *t) const { |
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602 bool result = false; |
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603 |
992 | 604 const TypePtr* this_ptr = this->make_ptr(); // In case it is narrow_oop |
605 const TypePtr* t_ptr = t->make_ptr(); | |
606 if( this_ptr == NULL || t_ptr == NULL ) | |
607 return result; | |
608 | |
609 const TypeInstPtr* this_inst = this_ptr->isa_instptr(); | |
610 const TypeInstPtr* t_inst = t_ptr->isa_instptr(); | |
820
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611 if( this_inst && this_inst->is_loaded() && t_inst && t_inst->is_loaded() ) { |
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612 bool this_interface = this_inst->klass()->is_interface(); |
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613 bool t_interface = t_inst->klass()->is_interface(); |
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614 result = this_interface ^ t_interface; |
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615 } |
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616 |
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617 return result; |
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618 } |
12966 | 619 |
620 bool Type::interface_vs_oop(const Type *t) const { | |
621 if (interface_vs_oop_helper(t)) { | |
622 return true; | |
623 } | |
624 // Now check the speculative parts as well | |
625 const TypeOopPtr* this_spec = isa_oopptr() != NULL ? isa_oopptr()->speculative() : NULL; | |
626 const TypeOopPtr* t_spec = t->isa_oopptr() != NULL ? t->isa_oopptr()->speculative() : NULL; | |
627 if (this_spec != NULL && t_spec != NULL) { | |
628 if (this_spec->interface_vs_oop_helper(t_spec)) { | |
629 return true; | |
630 } | |
631 return false; | |
632 } | |
633 if (this_spec != NULL && this_spec->interface_vs_oop_helper(t)) { | |
634 return true; | |
635 } | |
636 if (t_spec != NULL && interface_vs_oop_helper(t_spec)) { | |
637 return true; | |
638 } | |
639 return false; | |
640 } | |
641 | |
820
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642 #endif |
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643 |
0 | 644 //------------------------------meet------------------------------------------- |
645 // Compute the MEET of two types. NOT virtual. It enforces that meet is | |
646 // commutative and the lattice is symmetric. | |
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647 const Type *Type::meet_helper(const Type *t, bool include_speculative) const { |
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648 if (isa_narrowoop() && t->isa_narrowoop()) { |
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649 const Type* result = make_ptr()->meet_helper(t->make_ptr(), include_speculative); |
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650 return result->make_narrowoop(); |
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651 } |
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652 if (isa_narrowklass() && t->isa_narrowklass()) { |
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653 const Type* result = make_ptr()->meet_helper(t->make_ptr(), include_speculative); |
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654 return result->make_narrowklass(); |
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655 } |
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656 |
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657 const Type *this_t = maybe_remove_speculative(include_speculative); |
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658 t = t->maybe_remove_speculative(include_speculative); |
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659 |
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660 const Type *mt = this_t->xmeet(t); |
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661 if (isa_narrowoop() || t->isa_narrowoop()) return mt; |
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662 if (isa_narrowklass() || t->isa_narrowklass()) return mt; |
0 | 663 #ifdef ASSERT |
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664 assert(mt == t->xmeet(this_t), "meet not commutative"); |
0 | 665 const Type* dual_join = mt->_dual; |
666 const Type *t2t = dual_join->xmeet(t->_dual); | |
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667 const Type *t2this = dual_join->xmeet(this_t->_dual); |
0 | 668 |
669 // Interface meet Oop is Not Symmetric: | |
670 // Interface:AnyNull meet Oop:AnyNull == Interface:AnyNull | |
671 // Interface:NotNull meet Oop:NotNull == java/lang/Object:NotNull | |
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672 |
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673 if( !interface_vs_oop(t) && (t2t != t->_dual || t2this != this_t->_dual) ) { |
0 | 674 tty->print_cr("=== Meet Not Symmetric ==="); |
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675 tty->print("t = "); t->dump(); tty->cr(); |
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676 tty->print("this= "); this_t->dump(); tty->cr(); |
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677 tty->print("mt=(t meet this)= "); mt->dump(); tty->cr(); |
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678 |
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679 tty->print("t_dual= "); t->_dual->dump(); tty->cr(); |
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680 tty->print("this_dual= "); this_t->_dual->dump(); tty->cr(); |
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681 tty->print("mt_dual= "); mt->_dual->dump(); tty->cr(); |
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682 |
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683 tty->print("mt_dual meet t_dual= "); t2t ->dump(); tty->cr(); |
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684 tty->print("mt_dual meet this_dual= "); t2this ->dump(); tty->cr(); |
0 | 685 |
686 fatal("meet not symmetric" ); | |
687 } | |
688 #endif | |
689 return mt; | |
690 } | |
691 | |
692 //------------------------------xmeet------------------------------------------ | |
693 // Compute the MEET of two types. It returns a new Type object. | |
694 const Type *Type::xmeet( const Type *t ) const { | |
695 // Perform a fast test for common case; meeting the same types together. | |
696 if( this == t ) return this; // Meeting same type-rep? | |
697 | |
698 // Meeting TOP with anything? | |
699 if( _base == Top ) return t; | |
700 | |
701 // Meeting BOTTOM with anything? | |
702 if( _base == Bottom ) return BOTTOM; | |
703 | |
704 // Current "this->_base" is one of: Bad, Multi, Control, Top, | |
705 // Abio, Abstore, Floatxxx, Doublexxx, Bottom, lastype. | |
706 switch (t->base()) { // Switch on original type | |
707 | |
708 // Cut in half the number of cases I must handle. Only need cases for when | |
709 // the given enum "t->type" is less than or equal to the local enum "type". | |
710 case FloatCon: | |
711 case DoubleCon: | |
712 case Int: | |
713 case Long: | |
714 return t->xmeet(this); | |
715 | |
716 case OopPtr: | |
717 return t->xmeet(this); | |
718 | |
719 case InstPtr: | |
720 return t->xmeet(this); | |
721 | |
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722 case MetadataPtr: |
0 | 723 case KlassPtr: |
724 return t->xmeet(this); | |
725 | |
726 case AryPtr: | |
727 return t->xmeet(this); | |
728 | |
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729 case NarrowOop: |
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730 return t->xmeet(this); |
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731 |
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732 case NarrowKlass: |
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733 return t->xmeet(this); |
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734 |
0 | 735 case Bad: // Type check |
736 default: // Bogus type not in lattice | |
737 typerr(t); | |
738 return Type::BOTTOM; | |
739 | |
740 case Bottom: // Ye Olde Default | |
741 return t; | |
742 | |
743 case FloatTop: | |
744 if( _base == FloatTop ) return this; | |
745 case FloatBot: // Float | |
746 if( _base == FloatBot || _base == FloatTop ) return FLOAT; | |
747 if( _base == DoubleTop || _base == DoubleBot ) return Type::BOTTOM; | |
748 typerr(t); | |
749 return Type::BOTTOM; | |
750 | |
751 case DoubleTop: | |
752 if( _base == DoubleTop ) return this; | |
753 case DoubleBot: // Double | |
754 if( _base == DoubleBot || _base == DoubleTop ) return DOUBLE; | |
755 if( _base == FloatTop || _base == FloatBot ) return Type::BOTTOM; | |
756 typerr(t); | |
757 return Type::BOTTOM; | |
758 | |
759 // These next few cases must match exactly or it is a compile-time error. | |
760 case Control: // Control of code | |
761 case Abio: // State of world outside of program | |
762 case Memory: | |
763 if( _base == t->_base ) return this; | |
764 typerr(t); | |
765 return Type::BOTTOM; | |
766 | |
767 case Top: // Top of the lattice | |
768 return this; | |
769 } | |
770 | |
771 // The type is unchanged | |
772 return this; | |
773 } | |
774 | |
775 //-----------------------------filter------------------------------------------ | |
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776 const Type *Type::filter_helper(const Type *kills, bool include_speculative) const { |
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777 const Type* ft = join_helper(kills, include_speculative); |
0 | 778 if (ft->empty()) |
779 return Type::TOP; // Canonical empty value | |
780 return ft; | |
781 } | |
782 | |
783 //------------------------------xdual------------------------------------------ | |
784 // Compute dual right now. | |
785 const Type::TYPES Type::dual_type[Type::lastype] = { | |
786 Bad, // Bad | |
787 Control, // Control | |
788 Bottom, // Top | |
789 Bad, // Int - handled in v-call | |
790 Bad, // Long - handled in v-call | |
791 Half, // Half | |
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792 Bad, // NarrowOop - handled in v-call |
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793 Bad, // NarrowKlass - handled in v-call |
0 | 794 |
795 Bad, // Tuple - handled in v-call | |
796 Bad, // Array - handled in v-call | |
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797 Bad, // VectorS - handled in v-call |
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798 Bad, // VectorD - handled in v-call |
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799 Bad, // VectorX - handled in v-call |
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800 Bad, // VectorY - handled in v-call |
0 | 801 |
802 Bad, // AnyPtr - handled in v-call | |
803 Bad, // RawPtr - handled in v-call | |
804 Bad, // OopPtr - handled in v-call | |
805 Bad, // InstPtr - handled in v-call | |
806 Bad, // AryPtr - handled in v-call | |
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807 |
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808 Bad, // MetadataPtr - handled in v-call |
0 | 809 Bad, // KlassPtr - handled in v-call |
810 | |
811 Bad, // Function - handled in v-call | |
812 Abio, // Abio | |
813 Return_Address,// Return_Address | |
814 Memory, // Memory | |
815 FloatBot, // FloatTop | |
816 FloatCon, // FloatCon | |
817 FloatTop, // FloatBot | |
818 DoubleBot, // DoubleTop | |
819 DoubleCon, // DoubleCon | |
820 DoubleTop, // DoubleBot | |
821 Top // Bottom | |
822 }; | |
823 | |
824 const Type *Type::xdual() const { | |
825 // Note: the base() accessor asserts the sanity of _base. | |
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826 assert(_type_info[base()].dual_type != Bad, "implement with v-call"); |
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827 return new Type(_type_info[_base].dual_type); |
0 | 828 } |
829 | |
830 //------------------------------has_memory------------------------------------- | |
831 bool Type::has_memory() const { | |
832 Type::TYPES tx = base(); | |
833 if (tx == Memory) return true; | |
834 if (tx == Tuple) { | |
835 const TypeTuple *t = is_tuple(); | |
836 for (uint i=0; i < t->cnt(); i++) { | |
837 tx = t->field_at(i)->base(); | |
838 if (tx == Memory) return true; | |
839 } | |
840 } | |
841 return false; | |
842 } | |
843 | |
844 #ifndef PRODUCT | |
845 //------------------------------dump2------------------------------------------ | |
846 void Type::dump2( Dict &d, uint depth, outputStream *st ) const { | |
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847 st->print("%s", _type_info[_base].msg); |
0 | 848 } |
849 | |
850 //------------------------------dump------------------------------------------- | |
851 void Type::dump_on(outputStream *st) const { | |
852 ResourceMark rm; | |
853 Dict d(cmpkey,hashkey); // Stop recursive type dumping | |
854 dump2(d,1, st); | |
163 | 855 if (is_ptr_to_narrowoop()) { |
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856 st->print(" [narrow]"); |
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857 } else if (is_ptr_to_narrowklass()) { |
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858 st->print(" [narrowklass]"); |
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859 } |
0 | 860 } |
861 #endif | |
862 | |
863 //------------------------------singleton-------------------------------------- | |
864 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
865 // constants (Ldi nodes). Singletons are integer, float or double constants. | |
866 bool Type::singleton(void) const { | |
867 return _base == Top || _base == Half; | |
868 } | |
869 | |
870 //------------------------------empty------------------------------------------ | |
871 // TRUE if Type is a type with no values, FALSE otherwise. | |
872 bool Type::empty(void) const { | |
873 switch (_base) { | |
874 case DoubleTop: | |
875 case FloatTop: | |
876 case Top: | |
877 return true; | |
878 | |
879 case Half: | |
880 case Abio: | |
881 case Return_Address: | |
882 case Memory: | |
883 case Bottom: | |
884 case FloatBot: | |
885 case DoubleBot: | |
886 return false; // never a singleton, therefore never empty | |
887 } | |
888 | |
889 ShouldNotReachHere(); | |
890 return false; | |
891 } | |
892 | |
893 //------------------------------dump_stats------------------------------------- | |
894 // Dump collected statistics to stderr | |
895 #ifndef PRODUCT | |
896 void Type::dump_stats() { | |
897 tty->print("Types made: %d\n", type_dict()->Size()); | |
898 } | |
899 #endif | |
900 | |
901 //------------------------------typerr----------------------------------------- | |
902 void Type::typerr( const Type *t ) const { | |
903 #ifndef PRODUCT | |
904 tty->print("\nError mixing types: "); | |
905 dump(); | |
906 tty->print(" and "); | |
907 t->dump(); | |
908 tty->print("\n"); | |
909 #endif | |
910 ShouldNotReachHere(); | |
911 } | |
912 | |
913 | |
914 //============================================================================= | |
915 // Convenience common pre-built types. | |
916 const TypeF *TypeF::ZERO; // Floating point zero | |
917 const TypeF *TypeF::ONE; // Floating point one | |
918 | |
919 //------------------------------make------------------------------------------- | |
920 // Create a float constant | |
921 const TypeF *TypeF::make(float f) { | |
922 return (TypeF*)(new TypeF(f))->hashcons(); | |
923 } | |
924 | |
925 //------------------------------meet------------------------------------------- | |
926 // Compute the MEET of two types. It returns a new Type object. | |
927 const Type *TypeF::xmeet( const Type *t ) const { | |
928 // Perform a fast test for common case; meeting the same types together. | |
929 if( this == t ) return this; // Meeting same type-rep? | |
930 | |
931 // Current "this->_base" is FloatCon | |
932 switch (t->base()) { // Switch on original type | |
933 case AnyPtr: // Mixing with oops happens when javac | |
934 case RawPtr: // reuses local variables | |
935 case OopPtr: | |
936 case InstPtr: | |
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937 case AryPtr: |
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938 case MetadataPtr: |
0 | 939 case KlassPtr: |
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940 case NarrowOop: |
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941 case NarrowKlass: |
0 | 942 case Int: |
943 case Long: | |
944 case DoubleTop: | |
945 case DoubleCon: | |
946 case DoubleBot: | |
947 case Bottom: // Ye Olde Default | |
948 return Type::BOTTOM; | |
949 | |
950 case FloatBot: | |
951 return t; | |
952 | |
953 default: // All else is a mistake | |
954 typerr(t); | |
955 | |
956 case FloatCon: // Float-constant vs Float-constant? | |
957 if( jint_cast(_f) != jint_cast(t->getf()) ) // unequal constants? | |
958 // must compare bitwise as positive zero, negative zero and NaN have | |
959 // all the same representation in C++ | |
960 return FLOAT; // Return generic float | |
961 // Equal constants | |
962 case Top: | |
963 case FloatTop: | |
964 break; // Return the float constant | |
965 } | |
966 return this; // Return the float constant | |
967 } | |
968 | |
969 //------------------------------xdual------------------------------------------ | |
970 // Dual: symmetric | |
971 const Type *TypeF::xdual() const { | |
972 return this; | |
973 } | |
974 | |
975 //------------------------------eq--------------------------------------------- | |
976 // Structural equality check for Type representations | |
977 bool TypeF::eq( const Type *t ) const { | |
978 if( g_isnan(_f) || | |
979 g_isnan(t->getf()) ) { | |
980 // One or both are NANs. If both are NANs return true, else false. | |
981 return (g_isnan(_f) && g_isnan(t->getf())); | |
982 } | |
983 if (_f == t->getf()) { | |
984 // (NaN is impossible at this point, since it is not equal even to itself) | |
985 if (_f == 0.0) { | |
986 // difference between positive and negative zero | |
987 if (jint_cast(_f) != jint_cast(t->getf())) return false; | |
988 } | |
989 return true; | |
990 } | |
991 return false; | |
992 } | |
993 | |
994 //------------------------------hash------------------------------------------- | |
995 // Type-specific hashing function. | |
996 int TypeF::hash(void) const { | |
997 return *(int*)(&_f); | |
998 } | |
999 | |
1000 //------------------------------is_finite-------------------------------------- | |
1001 // Has a finite value | |
1002 bool TypeF::is_finite() const { | |
1003 return g_isfinite(getf()) != 0; | |
1004 } | |
1005 | |
1006 //------------------------------is_nan----------------------------------------- | |
1007 // Is not a number (NaN) | |
1008 bool TypeF::is_nan() const { | |
1009 return g_isnan(getf()) != 0; | |
1010 } | |
1011 | |
1012 //------------------------------dump2------------------------------------------ | |
1013 // Dump float constant Type | |
1014 #ifndef PRODUCT | |
1015 void TypeF::dump2( Dict &d, uint depth, outputStream *st ) const { | |
1016 Type::dump2(d,depth, st); | |
1017 st->print("%f", _f); | |
1018 } | |
1019 #endif | |
1020 | |
1021 //------------------------------singleton-------------------------------------- | |
1022 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
1023 // constants (Ldi nodes). Singletons are integer, float or double constants | |
1024 // or a single symbol. | |
1025 bool TypeF::singleton(void) const { | |
1026 return true; // Always a singleton | |
1027 } | |
1028 | |
1029 bool TypeF::empty(void) const { | |
1030 return false; // always exactly a singleton | |
1031 } | |
1032 | |
1033 //============================================================================= | |
1034 // Convenience common pre-built types. | |
1035 const TypeD *TypeD::ZERO; // Floating point zero | |
1036 const TypeD *TypeD::ONE; // Floating point one | |
1037 | |
1038 //------------------------------make------------------------------------------- | |
1039 const TypeD *TypeD::make(double d) { | |
1040 return (TypeD*)(new TypeD(d))->hashcons(); | |
1041 } | |
1042 | |
1043 //------------------------------meet------------------------------------------- | |
1044 // Compute the MEET of two types. It returns a new Type object. | |
1045 const Type *TypeD::xmeet( const Type *t ) const { | |
1046 // Perform a fast test for common case; meeting the same types together. | |
1047 if( this == t ) return this; // Meeting same type-rep? | |
1048 | |
1049 // Current "this->_base" is DoubleCon | |
1050 switch (t->base()) { // Switch on original type | |
1051 case AnyPtr: // Mixing with oops happens when javac | |
1052 case RawPtr: // reuses local variables | |
1053 case OopPtr: | |
1054 case InstPtr: | |
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1055 case AryPtr: |
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1056 case MetadataPtr: |
0 | 1057 case KlassPtr: |
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1058 case NarrowOop: |
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1059 case NarrowKlass: |
0 | 1060 case Int: |
1061 case Long: | |
1062 case FloatTop: | |
1063 case FloatCon: | |
1064 case FloatBot: | |
1065 case Bottom: // Ye Olde Default | |
1066 return Type::BOTTOM; | |
1067 | |
1068 case DoubleBot: | |
1069 return t; | |
1070 | |
1071 default: // All else is a mistake | |
1072 typerr(t); | |
1073 | |
1074 case DoubleCon: // Double-constant vs Double-constant? | |
1075 if( jlong_cast(_d) != jlong_cast(t->getd()) ) // unequal constants? (see comment in TypeF::xmeet) | |
1076 return DOUBLE; // Return generic double | |
1077 case Top: | |
1078 case DoubleTop: | |
1079 break; | |
1080 } | |
1081 return this; // Return the double constant | |
1082 } | |
1083 | |
1084 //------------------------------xdual------------------------------------------ | |
1085 // Dual: symmetric | |
1086 const Type *TypeD::xdual() const { | |
1087 return this; | |
1088 } | |
1089 | |
1090 //------------------------------eq--------------------------------------------- | |
1091 // Structural equality check for Type representations | |
1092 bool TypeD::eq( const Type *t ) const { | |
1093 if( g_isnan(_d) || | |
1094 g_isnan(t->getd()) ) { | |
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1095 // it is important, when two different NaNs are used in one method, the NaNs are treated |
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1096 // as different NaNs (as C1 does) |
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1097 jdouble td = t->getd(); |
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1098 return *((jlong*)(&_d)) == *(jlong*)(&td); |
0 | 1099 } |
1100 if (_d == t->getd()) { | |
1101 // (NaN is impossible at this point, since it is not equal even to itself) | |
1102 if (_d == 0.0) { | |
1103 // difference between positive and negative zero | |
1104 if (jlong_cast(_d) != jlong_cast(t->getd())) return false; | |
1105 } | |
1106 return true; | |
1107 } | |
1108 return false; | |
1109 } | |
1110 | |
1111 //------------------------------hash------------------------------------------- | |
1112 // Type-specific hashing function. | |
1113 int TypeD::hash(void) const { | |
1114 return *(int*)(&_d); | |
1115 } | |
1116 | |
1117 //------------------------------is_finite-------------------------------------- | |
1118 // Has a finite value | |
1119 bool TypeD::is_finite() const { | |
1120 return g_isfinite(getd()) != 0; | |
1121 } | |
1122 | |
1123 //------------------------------is_nan----------------------------------------- | |
1124 // Is not a number (NaN) | |
1125 bool TypeD::is_nan() const { | |
1126 return g_isnan(getd()) != 0; | |
1127 } | |
1128 | |
1129 //------------------------------dump2------------------------------------------ | |
1130 // Dump double constant Type | |
1131 #ifndef PRODUCT | |
1132 void TypeD::dump2( Dict &d, uint depth, outputStream *st ) const { | |
1133 Type::dump2(d,depth,st); | |
1134 st->print("%f", _d); | |
1135 } | |
1136 #endif | |
1137 | |
1138 //------------------------------singleton-------------------------------------- | |
1139 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
1140 // constants (Ldi nodes). Singletons are integer, float or double constants | |
1141 // or a single symbol. | |
1142 bool TypeD::singleton(void) const { | |
1143 return true; // Always a singleton | |
1144 } | |
1145 | |
1146 bool TypeD::empty(void) const { | |
1147 return false; // always exactly a singleton | |
1148 } | |
1149 | |
1150 //============================================================================= | |
1151 // Convience common pre-built types. | |
1152 const TypeInt *TypeInt::MINUS_1;// -1 | |
1153 const TypeInt *TypeInt::ZERO; // 0 | |
1154 const TypeInt *TypeInt::ONE; // 1 | |
1155 const TypeInt *TypeInt::BOOL; // 0 or 1, FALSE or TRUE. | |
1156 const TypeInt *TypeInt::CC; // -1,0 or 1, condition codes | |
1157 const TypeInt *TypeInt::CC_LT; // [-1] == MINUS_1 | |
1158 const TypeInt *TypeInt::CC_GT; // [1] == ONE | |
1159 const TypeInt *TypeInt::CC_EQ; // [0] == ZERO | |
1160 const TypeInt *TypeInt::CC_LE; // [-1,0] | |
1161 const TypeInt *TypeInt::CC_GE; // [0,1] == BOOL (!) | |
1162 const TypeInt *TypeInt::BYTE; // Bytes, -128 to 127 | |
624 | 1163 const TypeInt *TypeInt::UBYTE; // Unsigned Bytes, 0 to 255 |
0 | 1164 const TypeInt *TypeInt::CHAR; // Java chars, 0-65535 |
1165 const TypeInt *TypeInt::SHORT; // Java shorts, -32768-32767 | |
1166 const TypeInt *TypeInt::POS; // Positive 32-bit integers or zero | |
1167 const TypeInt *TypeInt::POS1; // Positive 32-bit integers | |
1168 const TypeInt *TypeInt::INT; // 32-bit integers | |
1169 const TypeInt *TypeInt::SYMINT; // symmetric range [-max_jint..max_jint] | |
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1170 const TypeInt *TypeInt::TYPE_DOMAIN; // alias for TypeInt::INT |
0 | 1171 |
1172 //------------------------------TypeInt---------------------------------------- | |
1173 TypeInt::TypeInt( jint lo, jint hi, int w ) : Type(Int), _lo(lo), _hi(hi), _widen(w) { | |
1174 } | |
1175 | |
1176 //------------------------------make------------------------------------------- | |
1177 const TypeInt *TypeInt::make( jint lo ) { | |
1178 return (TypeInt*)(new TypeInt(lo,lo,WidenMin))->hashcons(); | |
1179 } | |
1180 | |
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1181 static int normalize_int_widen( jint lo, jint hi, int w ) { |
0 | 1182 // Certain normalizations keep us sane when comparing types. |
1183 // The 'SMALLINT' covers constants and also CC and its relatives. | |
1184 if (lo <= hi) { | |
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1185 if ((juint)(hi - lo) <= SMALLINT) w = Type::WidenMin; |
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1186 if ((juint)(hi - lo) >= max_juint) w = Type::WidenMax; // TypeInt::INT |
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1187 } else { |
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1188 if ((juint)(lo - hi) <= SMALLINT) w = Type::WidenMin; |
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1189 if ((juint)(lo - hi) >= max_juint) w = Type::WidenMin; // dual TypeInt::INT |
0 | 1190 } |
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1191 return w; |
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1192 } |
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1193 |
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1194 const TypeInt *TypeInt::make( jint lo, jint hi, int w ) { |
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1195 w = normalize_int_widen(lo, hi, w); |
0 | 1196 return (TypeInt*)(new TypeInt(lo,hi,w))->hashcons(); |
1197 } | |
1198 | |
1199 //------------------------------meet------------------------------------------- | |
1200 // Compute the MEET of two types. It returns a new Type representation object | |
1201 // with reference count equal to the number of Types pointing at it. | |
1202 // Caller should wrap a Types around it. | |
1203 const Type *TypeInt::xmeet( const Type *t ) const { | |
1204 // Perform a fast test for common case; meeting the same types together. | |
1205 if( this == t ) return this; // Meeting same type? | |
1206 | |
1207 // Currently "this->_base" is a TypeInt | |
1208 switch (t->base()) { // Switch on original type | |
1209 case AnyPtr: // Mixing with oops happens when javac | |
1210 case RawPtr: // reuses local variables | |
1211 case OopPtr: | |
1212 case InstPtr: | |
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1213 case AryPtr: |
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1214 case MetadataPtr: |
0 | 1215 case KlassPtr: |
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1216 case NarrowOop: |
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1217 case NarrowKlass: |
0 | 1218 case Long: |
1219 case FloatTop: | |
1220 case FloatCon: | |
1221 case FloatBot: | |
1222 case DoubleTop: | |
1223 case DoubleCon: | |
1224 case DoubleBot: | |
1225 case Bottom: // Ye Olde Default | |
1226 return Type::BOTTOM; | |
1227 default: // All else is a mistake | |
1228 typerr(t); | |
1229 case Top: // No change | |
1230 return this; | |
1231 case Int: // Int vs Int? | |
1232 break; | |
1233 } | |
1234 | |
1235 // Expand covered set | |
1236 const TypeInt *r = t->is_int(); | |
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1237 return make( MIN2(_lo,r->_lo), MAX2(_hi,r->_hi), MAX2(_widen,r->_widen) ); |
0 | 1238 } |
1239 | |
1240 //------------------------------xdual------------------------------------------ | |
1241 // Dual: reverse hi & lo; flip widen | |
1242 const Type *TypeInt::xdual() const { | |
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1243 int w = normalize_int_widen(_hi,_lo, WidenMax-_widen); |
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1244 return new TypeInt(_hi,_lo,w); |
0 | 1245 } |
1246 | |
1247 //------------------------------widen------------------------------------------ | |
1248 // Only happens for optimistic top-down optimizations. | |
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1249 const Type *TypeInt::widen( const Type *old, const Type* limit ) const { |
0 | 1250 // Coming from TOP or such; no widening |
1251 if( old->base() != Int ) return this; | |
1252 const TypeInt *ot = old->is_int(); | |
1253 | |
1254 // If new guy is equal to old guy, no widening | |
1255 if( _lo == ot->_lo && _hi == ot->_hi ) | |
1256 return old; | |
1257 | |
1258 // If new guy contains old, then we widened | |
1259 if( _lo <= ot->_lo && _hi >= ot->_hi ) { | |
1260 // New contains old | |
1261 // If new guy is already wider than old, no widening | |
1262 if( _widen > ot->_widen ) return this; | |
1263 // If old guy was a constant, do not bother | |
1264 if (ot->_lo == ot->_hi) return this; | |
1265 // Now widen new guy. | |
1266 // Check for widening too far | |
1267 if (_widen == WidenMax) { | |
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1268 int max = max_jint; |
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1269 int min = min_jint; |
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1270 if (limit->isa_int()) { |
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1271 max = limit->is_int()->_hi; |
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1272 min = limit->is_int()->_lo; |
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1273 } |
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1274 if (min < _lo && _hi < max) { |
0 | 1275 // If neither endpoint is extremal yet, push out the endpoint |
1276 // which is closer to its respective limit. | |
1277 if (_lo >= 0 || // easy common case | |
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1278 (juint)(_lo - min) >= (juint)(max - _hi)) { |
0 | 1279 // Try to widen to an unsigned range type of 31 bits: |
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1280 return make(_lo, max, WidenMax); |
0 | 1281 } else { |
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1282 return make(min, _hi, WidenMax); |
0 | 1283 } |
1284 } | |
1285 return TypeInt::INT; | |
1286 } | |
1287 // Returned widened new guy | |
1288 return make(_lo,_hi,_widen+1); | |
1289 } | |
1290 | |
1291 // If old guy contains new, then we probably widened too far & dropped to | |
1292 // bottom. Return the wider fellow. | |
1293 if ( ot->_lo <= _lo && ot->_hi >= _hi ) | |
1294 return old; | |
1295 | |
1296 //fatal("Integer value range is not subset"); | |
1297 //return this; | |
1298 return TypeInt::INT; | |
1299 } | |
1300 | |
1301 //------------------------------narrow--------------------------------------- | |
1302 // Only happens for pessimistic optimizations. | |
1303 const Type *TypeInt::narrow( const Type *old ) const { | |
1304 if (_lo >= _hi) return this; // already narrow enough | |
1305 if (old == NULL) return this; | |
1306 const TypeInt* ot = old->isa_int(); | |
1307 if (ot == NULL) return this; | |
1308 jint olo = ot->_lo; | |
1309 jint ohi = ot->_hi; | |
1310 | |
1311 // If new guy is equal to old guy, no narrowing | |
1312 if (_lo == olo && _hi == ohi) return old; | |
1313 | |
1314 // If old guy was maximum range, allow the narrowing | |
1315 if (olo == min_jint && ohi == max_jint) return this; | |
1316 | |
1317 if (_lo < olo || _hi > ohi) | |
1318 return this; // doesn't narrow; pretty wierd | |
1319 | |
1320 // The new type narrows the old type, so look for a "death march". | |
1321 // See comments on PhaseTransform::saturate. | |
1322 juint nrange = _hi - _lo; | |
1323 juint orange = ohi - olo; | |
1324 if (nrange < max_juint - 1 && nrange > (orange >> 1) + (SMALLINT*2)) { | |
1325 // Use the new type only if the range shrinks a lot. | |
1326 // We do not want the optimizer computing 2^31 point by point. | |
1327 return old; | |
1328 } | |
1329 | |
1330 return this; | |
1331 } | |
1332 | |
1333 //-----------------------------filter------------------------------------------ | |
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1334 const Type *TypeInt::filter_helper(const Type *kills, bool include_speculative) const { |
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1335 const TypeInt* ft = join_helper(kills, include_speculative)->isa_int(); |
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1336 if (ft == NULL || ft->empty()) |
0 | 1337 return Type::TOP; // Canonical empty value |
1338 if (ft->_widen < this->_widen) { | |
1339 // Do not allow the value of kill->_widen to affect the outcome. | |
1340 // The widen bits must be allowed to run freely through the graph. | |
1341 ft = TypeInt::make(ft->_lo, ft->_hi, this->_widen); | |
1342 } | |
1343 return ft; | |
1344 } | |
1345 | |
1346 //------------------------------eq--------------------------------------------- | |
1347 // Structural equality check for Type representations | |
1348 bool TypeInt::eq( const Type *t ) const { | |
1349 const TypeInt *r = t->is_int(); // Handy access | |
1350 return r->_lo == _lo && r->_hi == _hi && r->_widen == _widen; | |
1351 } | |
1352 | |
1353 //------------------------------hash------------------------------------------- | |
1354 // Type-specific hashing function. | |
1355 int TypeInt::hash(void) const { | |
1356 return _lo+_hi+_widen+(int)Type::Int; | |
1357 } | |
1358 | |
1359 //------------------------------is_finite-------------------------------------- | |
1360 // Has a finite value | |
1361 bool TypeInt::is_finite() const { | |
1362 return true; | |
1363 } | |
1364 | |
1365 //------------------------------dump2------------------------------------------ | |
1366 // Dump TypeInt | |
1367 #ifndef PRODUCT | |
1368 static const char* intname(char* buf, jint n) { | |
1369 if (n == min_jint) | |
1370 return "min"; | |
1371 else if (n < min_jint + 10000) | |
1372 sprintf(buf, "min+" INT32_FORMAT, n - min_jint); | |
1373 else if (n == max_jint) | |
1374 return "max"; | |
1375 else if (n > max_jint - 10000) | |
1376 sprintf(buf, "max-" INT32_FORMAT, max_jint - n); | |
1377 else | |
1378 sprintf(buf, INT32_FORMAT, n); | |
1379 return buf; | |
1380 } | |
1381 | |
1382 void TypeInt::dump2( Dict &d, uint depth, outputStream *st ) const { | |
1383 char buf[40], buf2[40]; | |
1384 if (_lo == min_jint && _hi == max_jint) | |
1385 st->print("int"); | |
1386 else if (is_con()) | |
1387 st->print("int:%s", intname(buf, get_con())); | |
1388 else if (_lo == BOOL->_lo && _hi == BOOL->_hi) | |
1389 st->print("bool"); | |
1390 else if (_lo == BYTE->_lo && _hi == BYTE->_hi) | |
1391 st->print("byte"); | |
1392 else if (_lo == CHAR->_lo && _hi == CHAR->_hi) | |
1393 st->print("char"); | |
1394 else if (_lo == SHORT->_lo && _hi == SHORT->_hi) | |
1395 st->print("short"); | |
1396 else if (_hi == max_jint) | |
1397 st->print("int:>=%s", intname(buf, _lo)); | |
1398 else if (_lo == min_jint) | |
1399 st->print("int:<=%s", intname(buf, _hi)); | |
1400 else | |
1401 st->print("int:%s..%s", intname(buf, _lo), intname(buf2, _hi)); | |
1402 | |
1403 if (_widen != 0 && this != TypeInt::INT) | |
1404 st->print(":%.*s", _widen, "wwww"); | |
1405 } | |
1406 #endif | |
1407 | |
1408 //------------------------------singleton-------------------------------------- | |
1409 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
1410 // constants. | |
1411 bool TypeInt::singleton(void) const { | |
1412 return _lo >= _hi; | |
1413 } | |
1414 | |
1415 bool TypeInt::empty(void) const { | |
1416 return _lo > _hi; | |
1417 } | |
1418 | |
1419 //============================================================================= | |
1420 // Convenience common pre-built types. | |
1421 const TypeLong *TypeLong::MINUS_1;// -1 | |
1422 const TypeLong *TypeLong::ZERO; // 0 | |
1423 const TypeLong *TypeLong::ONE; // 1 | |
1424 const TypeLong *TypeLong::POS; // >=0 | |
1425 const TypeLong *TypeLong::LONG; // 64-bit integers | |
1426 const TypeLong *TypeLong::INT; // 32-bit subrange | |
1427 const TypeLong *TypeLong::UINT; // 32-bit unsigned subrange | |
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1428 const TypeLong *TypeLong::TYPE_DOMAIN; // alias for TypeLong::LONG |
0 | 1429 |
1430 //------------------------------TypeLong--------------------------------------- | |
1431 TypeLong::TypeLong( jlong lo, jlong hi, int w ) : Type(Long), _lo(lo), _hi(hi), _widen(w) { | |
1432 } | |
1433 | |
1434 //------------------------------make------------------------------------------- | |
1435 const TypeLong *TypeLong::make( jlong lo ) { | |
1436 return (TypeLong*)(new TypeLong(lo,lo,WidenMin))->hashcons(); | |
1437 } | |
1438 | |
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1439 static int normalize_long_widen( jlong lo, jlong hi, int w ) { |
0 | 1440 // Certain normalizations keep us sane when comparing types. |
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1441 // The 'SMALLINT' covers constants. |
0 | 1442 if (lo <= hi) { |
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1443 if ((julong)(hi - lo) <= SMALLINT) w = Type::WidenMin; |
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1444 if ((julong)(hi - lo) >= max_julong) w = Type::WidenMax; // TypeLong::LONG |
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1445 } else { |
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1446 if ((julong)(lo - hi) <= SMALLINT) w = Type::WidenMin; |
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1447 if ((julong)(lo - hi) >= max_julong) w = Type::WidenMin; // dual TypeLong::LONG |
0 | 1448 } |
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1449 return w; |
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1450 } |
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1451 |
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1452 const TypeLong *TypeLong::make( jlong lo, jlong hi, int w ) { |
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1453 w = normalize_long_widen(lo, hi, w); |
0 | 1454 return (TypeLong*)(new TypeLong(lo,hi,w))->hashcons(); |
1455 } | |
1456 | |
1457 | |
1458 //------------------------------meet------------------------------------------- | |
1459 // Compute the MEET of two types. It returns a new Type representation object | |
1460 // with reference count equal to the number of Types pointing at it. | |
1461 // Caller should wrap a Types around it. | |
1462 const Type *TypeLong::xmeet( const Type *t ) const { | |
1463 // Perform a fast test for common case; meeting the same types together. | |
1464 if( this == t ) return this; // Meeting same type? | |
1465 | |
1466 // Currently "this->_base" is a TypeLong | |
1467 switch (t->base()) { // Switch on original type | |
1468 case AnyPtr: // Mixing with oops happens when javac | |
1469 case RawPtr: // reuses local variables | |
1470 case OopPtr: | |
1471 case InstPtr: | |
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1472 case AryPtr: |
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1473 case MetadataPtr: |
0 | 1474 case KlassPtr: |
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1475 case NarrowOop: |
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1476 case NarrowKlass: |
0 | 1477 case Int: |
1478 case FloatTop: | |
1479 case FloatCon: | |
1480 case FloatBot: | |
1481 case DoubleTop: | |
1482 case DoubleCon: | |
1483 case DoubleBot: | |
1484 case Bottom: // Ye Olde Default | |
1485 return Type::BOTTOM; | |
1486 default: // All else is a mistake | |
1487 typerr(t); | |
1488 case Top: // No change | |
1489 return this; | |
1490 case Long: // Long vs Long? | |
1491 break; | |
1492 } | |
1493 | |
1494 // Expand covered set | |
1495 const TypeLong *r = t->is_long(); // Turn into a TypeLong | |
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1496 return make( MIN2(_lo,r->_lo), MAX2(_hi,r->_hi), MAX2(_widen,r->_widen) ); |
0 | 1497 } |
1498 | |
1499 //------------------------------xdual------------------------------------------ | |
1500 // Dual: reverse hi & lo; flip widen | |
1501 const Type *TypeLong::xdual() const { | |
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1502 int w = normalize_long_widen(_hi,_lo, WidenMax-_widen); |
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1503 return new TypeLong(_hi,_lo,w); |
0 | 1504 } |
1505 | |
1506 //------------------------------widen------------------------------------------ | |
1507 // Only happens for optimistic top-down optimizations. | |
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1508 const Type *TypeLong::widen( const Type *old, const Type* limit ) const { |
0 | 1509 // Coming from TOP or such; no widening |
1510 if( old->base() != Long ) return this; | |
1511 const TypeLong *ot = old->is_long(); | |
1512 | |
1513 // If new guy is equal to old guy, no widening | |
1514 if( _lo == ot->_lo && _hi == ot->_hi ) | |
1515 return old; | |
1516 | |
1517 // If new guy contains old, then we widened | |
1518 if( _lo <= ot->_lo && _hi >= ot->_hi ) { | |
1519 // New contains old | |
1520 // If new guy is already wider than old, no widening | |
1521 if( _widen > ot->_widen ) return this; | |
1522 // If old guy was a constant, do not bother | |
1523 if (ot->_lo == ot->_hi) return this; | |
1524 // Now widen new guy. | |
1525 // Check for widening too far | |
1526 if (_widen == WidenMax) { | |
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1527 jlong max = max_jlong; |
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1528 jlong min = min_jlong; |
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1529 if (limit->isa_long()) { |
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1530 max = limit->is_long()->_hi; |
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1531 min = limit->is_long()->_lo; |
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1532 } |
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1533 if (min < _lo && _hi < max) { |
0 | 1534 // If neither endpoint is extremal yet, push out the endpoint |
1535 // which is closer to its respective limit. | |
1536 if (_lo >= 0 || // easy common case | |
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1537 (julong)(_lo - min) >= (julong)(max - _hi)) { |
0 | 1538 // Try to widen to an unsigned range type of 32/63 bits: |
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1539 if (max >= max_juint && _hi < max_juint) |
0 | 1540 return make(_lo, max_juint, WidenMax); |
1541 else | |
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1542 return make(_lo, max, WidenMax); |
0 | 1543 } else { |
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1544 return make(min, _hi, WidenMax); |
0 | 1545 } |
1546 } | |
1547 return TypeLong::LONG; | |
1548 } | |
1549 // Returned widened new guy | |
1550 return make(_lo,_hi,_widen+1); | |
1551 } | |
1552 | |
1553 // If old guy contains new, then we probably widened too far & dropped to | |
1554 // bottom. Return the wider fellow. | |
1555 if ( ot->_lo <= _lo && ot->_hi >= _hi ) | |
1556 return old; | |
1557 | |
1558 // fatal("Long value range is not subset"); | |
1559 // return this; | |
1560 return TypeLong::LONG; | |
1561 } | |
1562 | |
1563 //------------------------------narrow---------------------------------------- | |
1564 // Only happens for pessimistic optimizations. | |
1565 const Type *TypeLong::narrow( const Type *old ) const { | |
1566 if (_lo >= _hi) return this; // already narrow enough | |
1567 if (old == NULL) return this; | |
1568 const TypeLong* ot = old->isa_long(); | |
1569 if (ot == NULL) return this; | |
1570 jlong olo = ot->_lo; | |
1571 jlong ohi = ot->_hi; | |
1572 | |
1573 // If new guy is equal to old guy, no narrowing | |
1574 if (_lo == olo && _hi == ohi) return old; | |
1575 | |
1576 // If old guy was maximum range, allow the narrowing | |
1577 if (olo == min_jlong && ohi == max_jlong) return this; | |
1578 | |
1579 if (_lo < olo || _hi > ohi) | |
1580 return this; // doesn't narrow; pretty wierd | |
1581 | |
1582 // The new type narrows the old type, so look for a "death march". | |
1583 // See comments on PhaseTransform::saturate. | |
1584 julong nrange = _hi - _lo; | |
1585 julong orange = ohi - olo; | |
1586 if (nrange < max_julong - 1 && nrange > (orange >> 1) + (SMALLINT*2)) { | |
1587 // Use the new type only if the range shrinks a lot. | |
1588 // We do not want the optimizer computing 2^31 point by point. | |
1589 return old; | |
1590 } | |
1591 | |
1592 return this; | |
1593 } | |
1594 | |
1595 //-----------------------------filter------------------------------------------ | |
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1596 const Type *TypeLong::filter_helper(const Type *kills, bool include_speculative) const { |
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1597 const TypeLong* ft = join_helper(kills, include_speculative)->isa_long(); |
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1598 if (ft == NULL || ft->empty()) |
0 | 1599 return Type::TOP; // Canonical empty value |
1600 if (ft->_widen < this->_widen) { | |
1601 // Do not allow the value of kill->_widen to affect the outcome. | |
1602 // The widen bits must be allowed to run freely through the graph. | |
1603 ft = TypeLong::make(ft->_lo, ft->_hi, this->_widen); | |
1604 } | |
1605 return ft; | |
1606 } | |
1607 | |
1608 //------------------------------eq--------------------------------------------- | |
1609 // Structural equality check for Type representations | |
1610 bool TypeLong::eq( const Type *t ) const { | |
1611 const TypeLong *r = t->is_long(); // Handy access | |
1612 return r->_lo == _lo && r->_hi == _hi && r->_widen == _widen; | |
1613 } | |
1614 | |
1615 //------------------------------hash------------------------------------------- | |
1616 // Type-specific hashing function. | |
1617 int TypeLong::hash(void) const { | |
1618 return (int)(_lo+_hi+_widen+(int)Type::Long); | |
1619 } | |
1620 | |
1621 //------------------------------is_finite-------------------------------------- | |
1622 // Has a finite value | |
1623 bool TypeLong::is_finite() const { | |
1624 return true; | |
1625 } | |
1626 | |
1627 //------------------------------dump2------------------------------------------ | |
1628 // Dump TypeLong | |
1629 #ifndef PRODUCT | |
1630 static const char* longnamenear(jlong x, const char* xname, char* buf, jlong n) { | |
1631 if (n > x) { | |
1632 if (n >= x + 10000) return NULL; | |
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1633 sprintf(buf, "%s+" JLONG_FORMAT, xname, n - x); |
0 | 1634 } else if (n < x) { |
1635 if (n <= x - 10000) return NULL; | |
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1636 sprintf(buf, "%s-" JLONG_FORMAT, xname, x - n); |
0 | 1637 } else { |
1638 return xname; | |
1639 } | |
1640 return buf; | |
1641 } | |
1642 | |
1643 static const char* longname(char* buf, jlong n) { | |
1644 const char* str; | |
1645 if (n == min_jlong) | |
1646 return "min"; | |
1647 else if (n < min_jlong + 10000) | |
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1648 sprintf(buf, "min+" JLONG_FORMAT, n - min_jlong); |
0 | 1649 else if (n == max_jlong) |
1650 return "max"; | |
1651 else if (n > max_jlong - 10000) | |
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1652 sprintf(buf, "max-" JLONG_FORMAT, max_jlong - n); |
0 | 1653 else if ((str = longnamenear(max_juint, "maxuint", buf, n)) != NULL) |
1654 return str; | |
1655 else if ((str = longnamenear(max_jint, "maxint", buf, n)) != NULL) | |
1656 return str; | |
1657 else if ((str = longnamenear(min_jint, "minint", buf, n)) != NULL) | |
1658 return str; | |
1659 else | |
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1660 sprintf(buf, JLONG_FORMAT, n); |
0 | 1661 return buf; |
1662 } | |
1663 | |
1664 void TypeLong::dump2( Dict &d, uint depth, outputStream *st ) const { | |
1665 char buf[80], buf2[80]; | |
1666 if (_lo == min_jlong && _hi == max_jlong) | |
1667 st->print("long"); | |
1668 else if (is_con()) | |
1669 st->print("long:%s", longname(buf, get_con())); | |
1670 else if (_hi == max_jlong) | |
1671 st->print("long:>=%s", longname(buf, _lo)); | |
1672 else if (_lo == min_jlong) | |
1673 st->print("long:<=%s", longname(buf, _hi)); | |
1674 else | |
1675 st->print("long:%s..%s", longname(buf, _lo), longname(buf2, _hi)); | |
1676 | |
1677 if (_widen != 0 && this != TypeLong::LONG) | |
1678 st->print(":%.*s", _widen, "wwww"); | |
1679 } | |
1680 #endif | |
1681 | |
1682 //------------------------------singleton-------------------------------------- | |
1683 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
1684 // constants | |
1685 bool TypeLong::singleton(void) const { | |
1686 return _lo >= _hi; | |
1687 } | |
1688 | |
1689 bool TypeLong::empty(void) const { | |
1690 return _lo > _hi; | |
1691 } | |
1692 | |
1693 //============================================================================= | |
1694 // Convenience common pre-built types. | |
1695 const TypeTuple *TypeTuple::IFBOTH; // Return both arms of IF as reachable | |
1696 const TypeTuple *TypeTuple::IFFALSE; | |
1697 const TypeTuple *TypeTuple::IFTRUE; | |
1698 const TypeTuple *TypeTuple::IFNEITHER; | |
1699 const TypeTuple *TypeTuple::LOOPBODY; | |
1700 const TypeTuple *TypeTuple::MEMBAR; | |
1701 const TypeTuple *TypeTuple::STORECONDITIONAL; | |
1702 const TypeTuple *TypeTuple::START_I2C; | |
1703 const TypeTuple *TypeTuple::INT_PAIR; | |
1704 const TypeTuple *TypeTuple::LONG_PAIR; | |
12323 | 1705 const TypeTuple *TypeTuple::INT_CC_PAIR; |
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1706 const TypeTuple *TypeTuple::LONG_CC_PAIR; |
0 | 1707 |
1708 | |
1709 //------------------------------make------------------------------------------- | |
1710 // Make a TypeTuple from the range of a method signature | |
1711 const TypeTuple *TypeTuple::make_range(ciSignature* sig) { | |
1712 ciType* return_type = sig->return_type(); | |
1713 uint total_fields = TypeFunc::Parms + return_type->size(); | |
1714 const Type **field_array = fields(total_fields); | |
1715 switch (return_type->basic_type()) { | |
1716 case T_LONG: | |
1717 field_array[TypeFunc::Parms] = TypeLong::LONG; | |
1718 field_array[TypeFunc::Parms+1] = Type::HALF; | |
1719 break; | |
1720 case T_DOUBLE: | |
1721 field_array[TypeFunc::Parms] = Type::DOUBLE; | |
1722 field_array[TypeFunc::Parms+1] = Type::HALF; | |
1723 break; | |
1724 case T_OBJECT: | |
1725 case T_ARRAY: | |
1726 case T_BOOLEAN: | |
1727 case T_CHAR: | |
1728 case T_FLOAT: | |
1729 case T_BYTE: | |
1730 case T_SHORT: | |
1731 case T_INT: | |
1732 field_array[TypeFunc::Parms] = get_const_type(return_type); | |
1733 break; | |
1734 case T_VOID: | |
1735 break; | |
1736 default: | |
1737 ShouldNotReachHere(); | |
1738 } | |
1739 return (TypeTuple*)(new TypeTuple(total_fields,field_array))->hashcons(); | |
1740 } | |
1741 | |
1742 // Make a TypeTuple from the domain of a method signature | |
1743 const TypeTuple *TypeTuple::make_domain(ciInstanceKlass* recv, ciSignature* sig) { | |
1744 uint total_fields = TypeFunc::Parms + sig->size(); | |
1745 | |
1746 uint pos = TypeFunc::Parms; | |
1747 const Type **field_array; | |
1748 if (recv != NULL) { | |
1749 total_fields++; | |
1750 field_array = fields(total_fields); | |
1751 // Use get_const_type here because it respects UseUniqueSubclasses: | |
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1752 field_array[pos++] = get_const_type(recv)->join_speculative(TypePtr::NOTNULL); |
0 | 1753 } else { |
1754 field_array = fields(total_fields); | |
1755 } | |
1756 | |
1757 int i = 0; | |
1758 while (pos < total_fields) { | |
1759 ciType* type = sig->type_at(i); | |
1760 | |
1761 switch (type->basic_type()) { | |
1762 case T_LONG: | |
1763 field_array[pos++] = TypeLong::LONG; | |
1764 field_array[pos++] = Type::HALF; | |
1765 break; | |
1766 case T_DOUBLE: | |
1767 field_array[pos++] = Type::DOUBLE; | |
1768 field_array[pos++] = Type::HALF; | |
1769 break; | |
1770 case T_OBJECT: | |
1771 case T_ARRAY: | |
1772 case T_BOOLEAN: | |
1773 case T_CHAR: | |
1774 case T_FLOAT: | |
1775 case T_BYTE: | |
1776 case T_SHORT: | |
1777 case T_INT: | |
1778 field_array[pos++] = get_const_type(type); | |
1779 break; | |
1780 default: | |
1781 ShouldNotReachHere(); | |
1782 } | |
1783 i++; | |
1784 } | |
1785 return (TypeTuple*)(new TypeTuple(total_fields,field_array))->hashcons(); | |
1786 } | |
1787 | |
1788 const TypeTuple *TypeTuple::make( uint cnt, const Type **fields ) { | |
1789 return (TypeTuple*)(new TypeTuple(cnt,fields))->hashcons(); | |
1790 } | |
1791 | |
1792 //------------------------------fields----------------------------------------- | |
1793 // Subroutine call type with space allocated for argument types | |
1794 const Type **TypeTuple::fields( uint arg_cnt ) { | |
1795 const Type **flds = (const Type **)(Compile::current()->type_arena()->Amalloc_4((TypeFunc::Parms+arg_cnt)*sizeof(Type*) )); | |
1796 flds[TypeFunc::Control ] = Type::CONTROL; | |
1797 flds[TypeFunc::I_O ] = Type::ABIO; | |
1798 flds[TypeFunc::Memory ] = Type::MEMORY; | |
1799 flds[TypeFunc::FramePtr ] = TypeRawPtr::BOTTOM; | |
1800 flds[TypeFunc::ReturnAdr] = Type::RETURN_ADDRESS; | |
1801 | |
1802 return flds; | |
1803 } | |
1804 | |
1805 //------------------------------meet------------------------------------------- | |
1806 // Compute the MEET of two types. It returns a new Type object. | |
1807 const Type *TypeTuple::xmeet( const Type *t ) const { | |
1808 // Perform a fast test for common case; meeting the same types together. | |
1809 if( this == t ) return this; // Meeting same type-rep? | |
1810 | |
1811 // Current "this->_base" is Tuple | |
1812 switch (t->base()) { // switch on original type | |
1813 | |
1814 case Bottom: // Ye Olde Default | |
1815 return t; | |
1816 | |
1817 default: // All else is a mistake | |
1818 typerr(t); | |
1819 | |
1820 case Tuple: { // Meeting 2 signatures? | |
1821 const TypeTuple *x = t->is_tuple(); | |
1822 assert( _cnt == x->_cnt, "" ); | |
1823 const Type **fields = (const Type **)(Compile::current()->type_arena()->Amalloc_4( _cnt*sizeof(Type*) )); | |
1824 for( uint i=0; i<_cnt; i++ ) | |
1825 fields[i] = field_at(i)->xmeet( x->field_at(i) ); | |
1826 return TypeTuple::make(_cnt,fields); | |
1827 } | |
1828 case Top: | |
1829 break; | |
1830 } | |
1831 return this; // Return the double constant | |
1832 } | |
1833 | |
1834 //------------------------------xdual------------------------------------------ | |
1835 // Dual: compute field-by-field dual | |
1836 const Type *TypeTuple::xdual() const { | |
1837 const Type **fields = (const Type **)(Compile::current()->type_arena()->Amalloc_4( _cnt*sizeof(Type*) )); | |
1838 for( uint i=0; i<_cnt; i++ ) | |
1839 fields[i] = _fields[i]->dual(); | |
1840 return new TypeTuple(_cnt,fields); | |
1841 } | |
1842 | |
1843 //------------------------------eq--------------------------------------------- | |
1844 // Structural equality check for Type representations | |
1845 bool TypeTuple::eq( const Type *t ) const { | |
1846 const TypeTuple *s = (const TypeTuple *)t; | |
1847 if (_cnt != s->_cnt) return false; // Unequal field counts | |
1848 for (uint i = 0; i < _cnt; i++) | |
1849 if (field_at(i) != s->field_at(i)) // POINTER COMPARE! NO RECURSION! | |
1850 return false; // Missed | |
1851 return true; | |
1852 } | |
1853 | |
1854 //------------------------------hash------------------------------------------- | |
1855 // Type-specific hashing function. | |
1856 int TypeTuple::hash(void) const { | |
1857 intptr_t sum = _cnt; | |
1858 for( uint i=0; i<_cnt; i++ ) | |
1859 sum += (intptr_t)_fields[i]; // Hash on pointers directly | |
1860 return sum; | |
1861 } | |
1862 | |
1863 //------------------------------dump2------------------------------------------ | |
1864 // Dump signature Type | |
1865 #ifndef PRODUCT | |
1866 void TypeTuple::dump2( Dict &d, uint depth, outputStream *st ) const { | |
1867 st->print("{"); | |
1868 if( !depth || d[this] ) { // Check for recursive print | |
1869 st->print("...}"); | |
1870 return; | |
1871 } | |
1872 d.Insert((void*)this, (void*)this); // Stop recursion | |
1873 if( _cnt ) { | |
1874 uint i; | |
1875 for( i=0; i<_cnt-1; i++ ) { | |
1876 st->print("%d:", i); | |
1877 _fields[i]->dump2(d, depth-1, st); | |
1878 st->print(", "); | |
1879 } | |
1880 st->print("%d:", i); | |
1881 _fields[i]->dump2(d, depth-1, st); | |
1882 } | |
1883 st->print("}"); | |
1884 } | |
1885 #endif | |
1886 | |
1887 //------------------------------singleton-------------------------------------- | |
1888 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
1889 // constants (Ldi nodes). Singletons are integer, float or double constants | |
1890 // or a single symbol. | |
1891 bool TypeTuple::singleton(void) const { | |
1892 return false; // Never a singleton | |
1893 } | |
1894 | |
1895 bool TypeTuple::empty(void) const { | |
1896 for( uint i=0; i<_cnt; i++ ) { | |
1897 if (_fields[i]->empty()) return true; | |
1898 } | |
1899 return false; | |
1900 } | |
1901 | |
1902 //============================================================================= | |
1903 // Convenience common pre-built types. | |
1904 | |
1905 inline const TypeInt* normalize_array_size(const TypeInt* size) { | |
1906 // Certain normalizations keep us sane when comparing types. | |
1907 // We do not want arrayOop variables to differ only by the wideness | |
1908 // of their index types. Pick minimum wideness, since that is the | |
1909 // forced wideness of small ranges anyway. | |
1910 if (size->_widen != Type::WidenMin) | |
1911 return TypeInt::make(size->_lo, size->_hi, Type::WidenMin); | |
1912 else | |
1913 return size; | |
1914 } | |
1915 | |
1916 //------------------------------make------------------------------------------- | |
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1917 const TypeAry* TypeAry::make(const Type* elem, const TypeInt* size, bool stable) { |
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1918 if (UseCompressedOops && elem->isa_oopptr()) { |
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1919 elem = elem->make_narrowoop(); |
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1920 } |
0 | 1921 size = normalize_array_size(size); |
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1922 return (TypeAry*)(new TypeAry(elem,size,stable))->hashcons(); |
0 | 1923 } |
1924 | |
1925 //------------------------------meet------------------------------------------- | |
1926 // Compute the MEET of two types. It returns a new Type object. | |
1927 const Type *TypeAry::xmeet( const Type *t ) const { | |
1928 // Perform a fast test for common case; meeting the same types together. | |
1929 if( this == t ) return this; // Meeting same type-rep? | |
1930 | |
1931 // Current "this->_base" is Ary | |
1932 switch (t->base()) { // switch on original type | |
1933 | |
1934 case Bottom: // Ye Olde Default | |
1935 return t; | |
1936 | |
1937 default: // All else is a mistake | |
1938 typerr(t); | |
1939 | |
1940 case Array: { // Meeting 2 arrays? | |
1941 const TypeAry *a = t->is_ary(); | |
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1942 return TypeAry::make(_elem->meet_speculative(a->_elem), |
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1943 _size->xmeet(a->_size)->is_int(), |
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1944 _stable & a->_stable); |
0 | 1945 } |
1946 case Top: | |
1947 break; | |
1948 } | |
1949 return this; // Return the double constant | |
1950 } | |
1951 | |
1952 //------------------------------xdual------------------------------------------ | |
1953 // Dual: compute field-by-field dual | |
1954 const Type *TypeAry::xdual() const { | |
1955 const TypeInt* size_dual = _size->dual()->is_int(); | |
1956 size_dual = normalize_array_size(size_dual); | |
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1957 return new TypeAry(_elem->dual(), size_dual, !_stable); |
0 | 1958 } |
1959 | |
1960 //------------------------------eq--------------------------------------------- | |
1961 // Structural equality check for Type representations | |
1962 bool TypeAry::eq( const Type *t ) const { | |
1963 const TypeAry *a = (const TypeAry*)t; | |
1964 return _elem == a->_elem && | |
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1965 _stable == a->_stable && |
0 | 1966 _size == a->_size; |
1967 } | |
1968 | |
1969 //------------------------------hash------------------------------------------- | |
1970 // Type-specific hashing function. | |
1971 int TypeAry::hash(void) const { | |
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1972 return (intptr_t)_elem + (intptr_t)_size + (_stable ? 43 : 0); |
0 | 1973 } |
1974 | |
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1975 /** |
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1976 * Return same type without a speculative part in the element |
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1977 */ |
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1978 const Type* TypeAry::remove_speculative() const { |
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1979 return make(_elem->remove_speculative(), _size, _stable); |
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1980 } |
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1981 |
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1982 //----------------------interface_vs_oop--------------------------------------- |
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1983 #ifdef ASSERT |
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1984 bool TypeAry::interface_vs_oop(const Type *t) const { |
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1985 const TypeAry* t_ary = t->is_ary(); |
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1986 if (t_ary) { |
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1987 return _elem->interface_vs_oop(t_ary->_elem); |
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1988 } |
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1989 return false; |
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|
1990 } |
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|
1991 #endif |
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1992 |
0 | 1993 //------------------------------dump2------------------------------------------ |
1994 #ifndef PRODUCT | |
1995 void TypeAry::dump2( Dict &d, uint depth, outputStream *st ) const { | |
12190
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1996 if (_stable) st->print("stable:"); |
0 | 1997 _elem->dump2(d, depth, st); |
1998 st->print("["); | |
1999 _size->dump2(d, depth, st); | |
2000 st->print("]"); | |
2001 } | |
2002 #endif | |
2003 | |
2004 //------------------------------singleton-------------------------------------- | |
2005 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
2006 // constants (Ldi nodes). Singletons are integer, float or double constants | |
2007 // or a single symbol. | |
2008 bool TypeAry::singleton(void) const { | |
2009 return false; // Never a singleton | |
2010 } | |
2011 | |
2012 bool TypeAry::empty(void) const { | |
2013 return _elem->empty() || _size->empty(); | |
2014 } | |
2015 | |
2016 //--------------------------ary_must_be_exact---------------------------------- | |
2017 bool TypeAry::ary_must_be_exact() const { | |
2018 if (!UseExactTypes) return false; | |
2019 // This logic looks at the element type of an array, and returns true | |
2020 // if the element type is either a primitive or a final instance class. | |
2021 // In such cases, an array built on this ary must have no subclasses. | |
2022 if (_elem == BOTTOM) return false; // general array not exact | |
2023 if (_elem == TOP ) return false; // inverted general array not exact | |
113
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2024 const TypeOopPtr* toop = NULL; |
221
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2025 if (UseCompressedOops && _elem->isa_narrowoop()) { |
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2026 toop = _elem->make_ptr()->isa_oopptr(); |
113
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2027 } else { |
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2028 toop = _elem->isa_oopptr(); |
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2029 } |
0 | 2030 if (!toop) return true; // a primitive type, like int |
2031 ciKlass* tklass = toop->klass(); | |
2032 if (tklass == NULL) return false; // unloaded class | |
2033 if (!tklass->is_loaded()) return false; // unloaded class | |
113
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2034 const TypeInstPtr* tinst; |
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2035 if (_elem->isa_narrowoop()) |
221
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2036 tinst = _elem->make_ptr()->isa_instptr(); |
113
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2037 else |
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2038 tinst = _elem->isa_instptr(); |
221
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2039 if (tinst) |
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2040 return tklass->as_instance_klass()->is_final(); |
113
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2041 const TypeAryPtr* tap; |
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2042 if (_elem->isa_narrowoop()) |
221
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2043 tap = _elem->make_ptr()->isa_aryptr(); |
113
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2044 else |
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2045 tap = _elem->isa_aryptr(); |
221
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2046 if (tap) |
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2047 return tap->ary()->ary_must_be_exact(); |
0 | 2048 return false; |
2049 } | |
2050 | |
6179
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2051 //==============================TypeVect======================================= |
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2052 // Convenience common pre-built types. |
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2053 const TypeVect *TypeVect::VECTS = NULL; // 32-bit vectors |
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2054 const TypeVect *TypeVect::VECTD = NULL; // 64-bit vectors |
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2055 const TypeVect *TypeVect::VECTX = NULL; // 128-bit vectors |
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2056 const TypeVect *TypeVect::VECTY = NULL; // 256-bit vectors |
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2057 |
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2058 //------------------------------make------------------------------------------- |
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2059 const TypeVect* TypeVect::make(const Type *elem, uint length) { |
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2060 BasicType elem_bt = elem->array_element_basic_type(); |
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2061 assert(is_java_primitive(elem_bt), "only primitive types in vector"); |
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2062 assert(length > 1 && is_power_of_2(length), "vector length is power of 2"); |
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2063 assert(Matcher::vector_size_supported(elem_bt, length), "length in range"); |
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2064 int size = length * type2aelembytes(elem_bt); |
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2065 switch (Matcher::vector_ideal_reg(size)) { |
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2066 case Op_VecS: |
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2067 return (TypeVect*)(new TypeVectS(elem, length))->hashcons(); |
14437
15120a36272d
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2068 case Op_RegL: |
6179
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2069 case Op_VecD: |
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2070 case Op_RegD: |
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2071 return (TypeVect*)(new TypeVectD(elem, length))->hashcons(); |
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2072 case Op_VecX: |
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2073 return (TypeVect*)(new TypeVectX(elem, length))->hashcons(); |
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2074 case Op_VecY: |
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2075 return (TypeVect*)(new TypeVectY(elem, length))->hashcons(); |
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2076 } |
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|
2077 ShouldNotReachHere(); |
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|
2078 return NULL; |
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|
2079 } |
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|
2080 |
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|
2081 //------------------------------meet------------------------------------------- |
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2082 // Compute the MEET of two types. It returns a new Type object. |
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2083 const Type *TypeVect::xmeet( const Type *t ) const { |
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2084 // Perform a fast test for common case; meeting the same types together. |
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2085 if( this == t ) return this; // Meeting same type-rep? |
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|
2086 |
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|
2087 // Current "this->_base" is Vector |
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|
2088 switch (t->base()) { // switch on original type |
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|
2089 |
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|
2090 case Bottom: // Ye Olde Default |
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|
2091 return t; |
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|
2092 |
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|
2093 default: // All else is a mistake |
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|
2094 typerr(t); |
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|
2095 |
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|
2096 case VectorS: |
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|
2097 case VectorD: |
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|
2098 case VectorX: |
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|
2099 case VectorY: { // Meeting 2 vectors? |
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2100 const TypeVect* v = t->is_vect(); |
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2101 assert( base() == v->base(), ""); |
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2102 assert(length() == v->length(), ""); |
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|
2103 assert(element_basic_type() == v->element_basic_type(), ""); |
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2104 return TypeVect::make(_elem->xmeet(v->_elem), _length); |
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|
2105 } |
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|
2106 case Top: |
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|
2107 break; |
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|
2108 } |
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|
2109 return this; |
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|
2110 } |
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|
2111 |
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|
2112 //------------------------------xdual------------------------------------------ |
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2113 // Dual: compute field-by-field dual |
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2114 const Type *TypeVect::xdual() const { |
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2115 return new TypeVect(base(), _elem->dual(), _length); |
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2116 } |
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|
2117 |
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|
2118 //------------------------------eq--------------------------------------------- |
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2119 // Structural equality check for Type representations |
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2120 bool TypeVect::eq(const Type *t) const { |
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2121 const TypeVect *v = t->is_vect(); |
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2122 return (_elem == v->_elem) && (_length == v->_length); |
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2123 } |
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|
2124 |
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|
2125 //------------------------------hash------------------------------------------- |
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2126 // Type-specific hashing function. |
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2127 int TypeVect::hash(void) const { |
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2128 return (intptr_t)_elem + (intptr_t)_length; |
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2129 } |
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|
2130 |
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2131 //------------------------------singleton-------------------------------------- |
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2132 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple |
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2133 // constants (Ldi nodes). Vector is singleton if all elements are the same |
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2134 // constant value (when vector is created with Replicate code). |
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2135 bool TypeVect::singleton(void) const { |
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|
2136 // There is no Con node for vectors yet. |
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|
2137 // return _elem->singleton(); |
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|
2138 return false; |
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|
2139 } |
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|
2140 |
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2141 bool TypeVect::empty(void) const { |
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|
2142 return _elem->empty(); |
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2143 } |
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2144 |
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2145 //------------------------------dump2------------------------------------------ |
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2146 #ifndef PRODUCT |
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2147 void TypeVect::dump2(Dict &d, uint depth, outputStream *st) const { |
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2148 switch (base()) { |
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2149 case VectorS: |
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2150 st->print("vectors["); break; |
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2151 case VectorD: |
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2152 st->print("vectord["); break; |
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2153 case VectorX: |
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2154 st->print("vectorx["); break; |
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2155 case VectorY: |
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2156 st->print("vectory["); break; |
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2157 default: |
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2158 ShouldNotReachHere(); |
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2159 } |
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2160 st->print("%d]:{", _length); |
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2161 _elem->dump2(d, depth, st); |
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2162 st->print("}"); |
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2163 } |
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2164 #endif |
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2165 |
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2166 |
0 | 2167 //============================================================================= |
2168 // Convenience common pre-built types. | |
2169 const TypePtr *TypePtr::NULL_PTR; | |
2170 const TypePtr *TypePtr::NOTNULL; | |
2171 const TypePtr *TypePtr::BOTTOM; | |
2172 | |
2173 //------------------------------meet------------------------------------------- | |
2174 // Meet over the PTR enum | |
2175 const TypePtr::PTR TypePtr::ptr_meet[TypePtr::lastPTR][TypePtr::lastPTR] = { | |
2176 // TopPTR, AnyNull, Constant, Null, NotNull, BotPTR, | |
2177 { /* Top */ TopPTR, AnyNull, Constant, Null, NotNull, BotPTR,}, | |
2178 { /* AnyNull */ AnyNull, AnyNull, Constant, BotPTR, NotNull, BotPTR,}, | |
2179 { /* Constant*/ Constant, Constant, Constant, BotPTR, NotNull, BotPTR,}, | |
2180 { /* Null */ Null, BotPTR, BotPTR, Null, BotPTR, BotPTR,}, | |
2181 { /* NotNull */ NotNull, NotNull, NotNull, BotPTR, NotNull, BotPTR,}, | |
2182 { /* BotPTR */ BotPTR, BotPTR, BotPTR, BotPTR, BotPTR, BotPTR,} | |
2183 }; | |
2184 | |
2185 //------------------------------make------------------------------------------- | |
2186 const TypePtr *TypePtr::make( TYPES t, enum PTR ptr, int offset ) { | |
2187 return (TypePtr*)(new TypePtr(t,ptr,offset))->hashcons(); | |
2188 } | |
2189 | |
2190 //------------------------------cast_to_ptr_type------------------------------- | |
2191 const Type *TypePtr::cast_to_ptr_type(PTR ptr) const { | |
2192 assert(_base == AnyPtr, "subclass must override cast_to_ptr_type"); | |
2193 if( ptr == _ptr ) return this; | |
2194 return make(_base, ptr, _offset); | |
2195 } | |
2196 | |
2197 //------------------------------get_con---------------------------------------- | |
2198 intptr_t TypePtr::get_con() const { | |
2199 assert( _ptr == Null, "" ); | |
2200 return _offset; | |
2201 } | |
2202 | |
2203 //------------------------------meet------------------------------------------- | |
2204 // Compute the MEET of two types. It returns a new Type object. | |
2205 const Type *TypePtr::xmeet( const Type *t ) const { | |
2206 // Perform a fast test for common case; meeting the same types together. | |
2207 if( this == t ) return this; // Meeting same type-rep? | |
2208 | |
2209 // Current "this->_base" is AnyPtr | |
2210 switch (t->base()) { // switch on original type | |
2211 case Int: // Mixing ints & oops happens when javac | |
2212 case Long: // reuses local variables | |
2213 case FloatTop: | |
2214 case FloatCon: | |
2215 case FloatBot: | |
2216 case DoubleTop: | |
2217 case DoubleCon: | |
2218 case DoubleBot: | |
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2219 case NarrowOop: |
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2220 case NarrowKlass: |
0 | 2221 case Bottom: // Ye Olde Default |
2222 return Type::BOTTOM; | |
2223 case Top: | |
2224 return this; | |
2225 | |
2226 case AnyPtr: { // Meeting to AnyPtrs | |
2227 const TypePtr *tp = t->is_ptr(); | |
2228 return make( AnyPtr, meet_ptr(tp->ptr()), meet_offset(tp->offset()) ); | |
2229 } | |
2230 case RawPtr: // For these, flip the call around to cut down | |
2231 case OopPtr: | |
2232 case InstPtr: // on the cases I have to handle. | |
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2233 case AryPtr: |
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2234 case MetadataPtr: |
0 | 2235 case KlassPtr: |
2236 return t->xmeet(this); // Call in reverse direction | |
2237 default: // All else is a mistake | |
2238 typerr(t); | |
2239 | |
2240 } | |
2241 return this; | |
2242 } | |
2243 | |
2244 //------------------------------meet_offset------------------------------------ | |
2245 int TypePtr::meet_offset( int offset ) const { | |
2246 // Either is 'TOP' offset? Return the other offset! | |
2247 if( _offset == OffsetTop ) return offset; | |
2248 if( offset == OffsetTop ) return _offset; | |
2249 // If either is different, return 'BOTTOM' offset | |
2250 if( _offset != offset ) return OffsetBot; | |
2251 return _offset; | |
2252 } | |
2253 | |
2254 //------------------------------dual_offset------------------------------------ | |
2255 int TypePtr::dual_offset( ) const { | |
2256 if( _offset == OffsetTop ) return OffsetBot;// Map 'TOP' into 'BOTTOM' | |
2257 if( _offset == OffsetBot ) return OffsetTop;// Map 'BOTTOM' into 'TOP' | |
2258 return _offset; // Map everything else into self | |
2259 } | |
2260 | |
2261 //------------------------------xdual------------------------------------------ | |
2262 // Dual: compute field-by-field dual | |
2263 const TypePtr::PTR TypePtr::ptr_dual[TypePtr::lastPTR] = { | |
2264 BotPTR, NotNull, Constant, Null, AnyNull, TopPTR | |
2265 }; | |
2266 const Type *TypePtr::xdual() const { | |
2267 return new TypePtr( AnyPtr, dual_ptr(), dual_offset() ); | |
2268 } | |
2269 | |
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2270 //------------------------------xadd_offset------------------------------------ |
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2271 int TypePtr::xadd_offset( intptr_t offset ) const { |
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2272 // Adding to 'TOP' offset? Return 'TOP'! |
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2273 if( _offset == OffsetTop || offset == OffsetTop ) return OffsetTop; |
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2274 // Adding to 'BOTTOM' offset? Return 'BOTTOM'! |
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2275 if( _offset == OffsetBot || offset == OffsetBot ) return OffsetBot; |
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2276 // Addition overflows or "accidentally" equals to OffsetTop? Return 'BOTTOM'! |
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2277 offset += (intptr_t)_offset; |
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2278 if (offset != (int)offset || offset == OffsetTop) return OffsetBot; |
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2279 |
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2280 // assert( _offset >= 0 && _offset+offset >= 0, "" ); |
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2281 // It is possible to construct a negative offset during PhaseCCP |
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2282 |
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2283 return (int)offset; // Sum valid offsets |
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2284 } |
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2285 |
0 | 2286 //------------------------------add_offset------------------------------------- |
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2287 const TypePtr *TypePtr::add_offset( intptr_t offset ) const { |
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2288 return make( AnyPtr, _ptr, xadd_offset(offset) ); |
0 | 2289 } |
2290 | |
2291 //------------------------------eq--------------------------------------------- | |
2292 // Structural equality check for Type representations | |
2293 bool TypePtr::eq( const Type *t ) const { | |
2294 const TypePtr *a = (const TypePtr*)t; | |
2295 return _ptr == a->ptr() && _offset == a->offset(); | |
2296 } | |
2297 | |
2298 //------------------------------hash------------------------------------------- | |
2299 // Type-specific hashing function. | |
2300 int TypePtr::hash(void) const { | |
2301 return _ptr + _offset; | |
2302 } | |
2303 | |
2304 //------------------------------dump2------------------------------------------ | |
2305 const char *const TypePtr::ptr_msg[TypePtr::lastPTR] = { | |
2306 "TopPTR","AnyNull","Constant","NULL","NotNull","BotPTR" | |
2307 }; | |
2308 | |
2309 #ifndef PRODUCT | |
2310 void TypePtr::dump2( Dict &d, uint depth, outputStream *st ) const { | |
2311 if( _ptr == Null ) st->print("NULL"); | |
2312 else st->print("%s *", ptr_msg[_ptr]); | |
2313 if( _offset == OffsetTop ) st->print("+top"); | |
2314 else if( _offset == OffsetBot ) st->print("+bot"); | |
2315 else if( _offset ) st->print("+%d", _offset); | |
2316 } | |
2317 #endif | |
2318 | |
2319 //------------------------------singleton-------------------------------------- | |
2320 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
2321 // constants | |
2322 bool TypePtr::singleton(void) const { | |
2323 // TopPTR, Null, AnyNull, Constant are all singletons | |
2324 return (_offset != OffsetBot) && !below_centerline(_ptr); | |
2325 } | |
2326 | |
2327 bool TypePtr::empty(void) const { | |
2328 return (_offset == OffsetTop) || above_centerline(_ptr); | |
2329 } | |
2330 | |
2331 //============================================================================= | |
2332 // Convenience common pre-built types. | |
2333 const TypeRawPtr *TypeRawPtr::BOTTOM; | |
2334 const TypeRawPtr *TypeRawPtr::NOTNULL; | |
2335 | |
2336 //------------------------------make------------------------------------------- | |
2337 const TypeRawPtr *TypeRawPtr::make( enum PTR ptr ) { | |
2338 assert( ptr != Constant, "what is the constant?" ); | |
2339 assert( ptr != Null, "Use TypePtr for NULL" ); | |
2340 return (TypeRawPtr*)(new TypeRawPtr(ptr,0))->hashcons(); | |
2341 } | |
2342 | |
2343 const TypeRawPtr *TypeRawPtr::make( address bits ) { | |
2344 assert( bits, "Use TypePtr for NULL" ); | |
2345 return (TypeRawPtr*)(new TypeRawPtr(Constant,bits))->hashcons(); | |
2346 } | |
2347 | |
2348 //------------------------------cast_to_ptr_type------------------------------- | |
2349 const Type *TypeRawPtr::cast_to_ptr_type(PTR ptr) const { | |
2350 assert( ptr != Constant, "what is the constant?" ); | |
2351 assert( ptr != Null, "Use TypePtr for NULL" ); | |
2352 assert( _bits==0, "Why cast a constant address?"); | |
2353 if( ptr == _ptr ) return this; | |
2354 return make(ptr); | |
2355 } | |
2356 | |
2357 //------------------------------get_con---------------------------------------- | |
2358 intptr_t TypeRawPtr::get_con() const { | |
2359 assert( _ptr == Null || _ptr == Constant, "" ); | |
2360 return (intptr_t)_bits; | |
2361 } | |
2362 | |
2363 //------------------------------meet------------------------------------------- | |
2364 // Compute the MEET of two types. It returns a new Type object. | |
2365 const Type *TypeRawPtr::xmeet( const Type *t ) const { | |
2366 // Perform a fast test for common case; meeting the same types together. | |
2367 if( this == t ) return this; // Meeting same type-rep? | |
2368 | |
2369 // Current "this->_base" is RawPtr | |
2370 switch( t->base() ) { // switch on original type | |
2371 case Bottom: // Ye Olde Default | |
2372 return t; | |
2373 case Top: | |
2374 return this; | |
2375 case AnyPtr: // Meeting to AnyPtrs | |
2376 break; | |
2377 case RawPtr: { // might be top, bot, any/not or constant | |
2378 enum PTR tptr = t->is_ptr()->ptr(); | |
2379 enum PTR ptr = meet_ptr( tptr ); | |
2380 if( ptr == Constant ) { // Cannot be equal constants, so... | |
2381 if( tptr == Constant && _ptr != Constant) return t; | |
2382 if( _ptr == Constant && tptr != Constant) return this; | |
2383 ptr = NotNull; // Fall down in lattice | |
2384 } | |
2385 return make( ptr ); | |
2386 } | |
2387 | |
2388 case OopPtr: | |
2389 case InstPtr: | |
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2390 case AryPtr: |
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2391 case MetadataPtr: |
0 | 2392 case KlassPtr: |
2393 return TypePtr::BOTTOM; // Oop meet raw is not well defined | |
2394 default: // All else is a mistake | |
2395 typerr(t); | |
2396 } | |
2397 | |
2398 // Found an AnyPtr type vs self-RawPtr type | |
2399 const TypePtr *tp = t->is_ptr(); | |
2400 switch (tp->ptr()) { | |
2401 case TypePtr::TopPTR: return this; | |
2402 case TypePtr::BotPTR: return t; | |
2403 case TypePtr::Null: | |
2404 if( _ptr == TypePtr::TopPTR ) return t; | |
2405 return TypeRawPtr::BOTTOM; | |
2406 case TypePtr::NotNull: return TypePtr::make( AnyPtr, meet_ptr(TypePtr::NotNull), tp->meet_offset(0) ); | |
2407 case TypePtr::AnyNull: | |
2408 if( _ptr == TypePtr::Constant) return this; | |
2409 return make( meet_ptr(TypePtr::AnyNull) ); | |
2410 default: ShouldNotReachHere(); | |
2411 } | |
2412 return this; | |
2413 } | |
2414 | |
2415 //------------------------------xdual------------------------------------------ | |
2416 // Dual: compute field-by-field dual | |
2417 const Type *TypeRawPtr::xdual() const { | |
2418 return new TypeRawPtr( dual_ptr(), _bits ); | |
2419 } | |
2420 | |
2421 //------------------------------add_offset------------------------------------- | |
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2422 const TypePtr *TypeRawPtr::add_offset( intptr_t offset ) const { |
0 | 2423 if( offset == OffsetTop ) return BOTTOM; // Undefined offset-> undefined pointer |
2424 if( offset == OffsetBot ) return BOTTOM; // Unknown offset-> unknown pointer | |
2425 if( offset == 0 ) return this; // No change | |
2426 switch (_ptr) { | |
2427 case TypePtr::TopPTR: | |
2428 case TypePtr::BotPTR: | |
2429 case TypePtr::NotNull: | |
2430 return this; | |
2431 case TypePtr::Null: | |
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2432 case TypePtr::Constant: { |
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2433 address bits = _bits+offset; |
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2434 if ( bits == 0 ) return TypePtr::NULL_PTR; |
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2435 return make( bits ); |
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2436 } |
0 | 2437 default: ShouldNotReachHere(); |
2438 } | |
2439 return NULL; // Lint noise | |
2440 } | |
2441 | |
2442 //------------------------------eq--------------------------------------------- | |
2443 // Structural equality check for Type representations | |
2444 bool TypeRawPtr::eq( const Type *t ) const { | |
2445 const TypeRawPtr *a = (const TypeRawPtr*)t; | |
2446 return _bits == a->_bits && TypePtr::eq(t); | |
2447 } | |
2448 | |
2449 //------------------------------hash------------------------------------------- | |
2450 // Type-specific hashing function. | |
2451 int TypeRawPtr::hash(void) const { | |
2452 return (intptr_t)_bits + TypePtr::hash(); | |
2453 } | |
2454 | |
2455 //------------------------------dump2------------------------------------------ | |
2456 #ifndef PRODUCT | |
2457 void TypeRawPtr::dump2( Dict &d, uint depth, outputStream *st ) const { | |
2458 if( _ptr == Constant ) | |
2459 st->print(INTPTR_FORMAT, _bits); | |
2460 else | |
2461 st->print("rawptr:%s", ptr_msg[_ptr]); | |
2462 } | |
2463 #endif | |
2464 | |
2465 //============================================================================= | |
2466 // Convenience common pre-built type. | |
2467 const TypeOopPtr *TypeOopPtr::BOTTOM; | |
2468 | |
163 | 2469 //------------------------------TypeOopPtr------------------------------------- |
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2470 TypeOopPtr::TypeOopPtr(TYPES t, PTR ptr, ciKlass* k, bool xk, ciObject* o, int offset, int instance_id, const TypeOopPtr* speculative, int inline_depth) |
163 | 2471 : TypePtr(t, ptr, offset), |
2472 _const_oop(o), _klass(k), | |
2473 _klass_is_exact(xk), | |
2474 _is_ptr_to_narrowoop(false), | |
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2475 _is_ptr_to_narrowklass(false), |
10278 | 2476 _is_ptr_to_boxed_value(false), |
12966 | 2477 _instance_id(instance_id), |
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2478 _speculative(speculative), |
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2479 _inline_depth(inline_depth){ |
10278 | 2480 if (Compile::current()->eliminate_boxing() && (t == InstPtr) && |
2481 (offset > 0) && xk && (k != 0) && k->is_instance_klass()) { | |
2482 _is_ptr_to_boxed_value = k->as_instance_klass()->is_boxed_value_offset(offset); | |
2483 } | |
163 | 2484 #ifdef _LP64 |
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2485 if (_offset != 0) { |
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2486 if (_offset == oopDesc::klass_offset_in_bytes()) { |
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2487 _is_ptr_to_narrowklass = UseCompressedClassPointers; |
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2488 } else if (klass() == NULL) { |
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2489 // Array with unknown body type |
163 | 2490 assert(this->isa_aryptr(), "only arrays without klass"); |
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2491 _is_ptr_to_narrowoop = UseCompressedOops; |
163 | 2492 } else if (this->isa_aryptr()) { |
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2493 _is_ptr_to_narrowoop = (UseCompressedOops && klass()->is_obj_array_klass() && |
163 | 2494 _offset != arrayOopDesc::length_offset_in_bytes()); |
2495 } else if (klass()->is_instance_klass()) { | |
2496 ciInstanceKlass* ik = klass()->as_instance_klass(); | |
2497 ciField* field = NULL; | |
2498 if (this->isa_klassptr()) { | |
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2499 // Perm objects don't use compressed references |
163 | 2500 } else if (_offset == OffsetBot || _offset == OffsetTop) { |
2501 // unsafe access | |
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2502 _is_ptr_to_narrowoop = UseCompressedOops; |
163 | 2503 } else { // exclude unsafe ops |
2504 assert(this->isa_instptr(), "must be an instance ptr."); | |
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2505 |
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2506 if (klass() == ciEnv::current()->Class_klass() && |
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2507 (_offset == java_lang_Class::klass_offset_in_bytes() || |
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2508 _offset == java_lang_Class::array_klass_offset_in_bytes())) { |
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2509 // Special hidden fields from the Class. |
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2510 assert(this->isa_instptr(), "must be an instance ptr."); |
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2511 _is_ptr_to_narrowoop = false; |
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2512 } else if (klass() == ciEnv::current()->Class_klass() && |
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2513 _offset >= InstanceMirrorKlass::offset_of_static_fields()) { |
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2514 // Static fields |
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2515 assert(o != NULL, "must be constant"); |
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2516 ciInstanceKlass* k = o->as_instance()->java_lang_Class_klass()->as_instance_klass(); |
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2517 ciField* field = k->get_field_by_offset(_offset, true); |
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2518 assert(field != NULL, "missing field"); |
163 | 2519 BasicType basic_elem_type = field->layout_type(); |
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2520 _is_ptr_to_narrowoop = UseCompressedOops && (basic_elem_type == T_OBJECT || |
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2521 basic_elem_type == T_ARRAY); |
163 | 2522 } else { |
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2523 // Instance fields which contains a compressed oop references. |
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2524 field = ik->get_field_by_offset(_offset, false); |
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2525 if (field != NULL) { |
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2526 BasicType basic_elem_type = field->layout_type(); |
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2527 _is_ptr_to_narrowoop = UseCompressedOops && (basic_elem_type == T_OBJECT || |
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2528 basic_elem_type == T_ARRAY); |
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2529 } else if (klass()->equals(ciEnv::current()->Object_klass())) { |
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2530 // Compile::find_alias_type() cast exactness on all types to verify |
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2531 // that it does not affect alias type. |
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2532 _is_ptr_to_narrowoop = UseCompressedOops; |
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2533 } else { |
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2534 // Type for the copy start in LibraryCallKit::inline_native_clone(). |
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2535 _is_ptr_to_narrowoop = UseCompressedOops; |
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2536 } |
163 | 2537 } |
2538 } | |
2539 } | |
2540 } | |
2541 #endif | |
2542 } | |
2543 | |
0 | 2544 //------------------------------make------------------------------------------- |
2545 const TypeOopPtr *TypeOopPtr::make(PTR ptr, | |
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2546 int offset, int instance_id, const TypeOopPtr* speculative, int inline_depth) { |
0 | 2547 assert(ptr != Constant, "no constant generic pointers"); |
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2548 ciKlass* k = Compile::current()->env()->Object_klass(); |
0 | 2549 bool xk = false; |
2550 ciObject* o = NULL; | |
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2551 return (TypeOopPtr*)(new TypeOopPtr(OopPtr, ptr, k, xk, o, offset, instance_id, speculative, inline_depth))->hashcons(); |
0 | 2552 } |
2553 | |
2554 | |
2555 //------------------------------cast_to_ptr_type------------------------------- | |
2556 const Type *TypeOopPtr::cast_to_ptr_type(PTR ptr) const { | |
2557 assert(_base == OopPtr, "subclass must override cast_to_ptr_type"); | |
2558 if( ptr == _ptr ) return this; | |
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2559 return make(ptr, _offset, _instance_id, _speculative, _inline_depth); |
0 | 2560 } |
2561 | |
247 | 2562 //-----------------------------cast_to_instance_id---------------------------- |
223 | 2563 const TypeOopPtr *TypeOopPtr::cast_to_instance_id(int instance_id) const { |
0 | 2564 // There are no instances of a general oop. |
2565 // Return self unchanged. | |
2566 return this; | |
2567 } | |
2568 | |
2569 //-----------------------------cast_to_exactness------------------------------- | |
2570 const Type *TypeOopPtr::cast_to_exactness(bool klass_is_exact) const { | |
2571 // There is no such thing as an exact general oop. | |
2572 // Return self unchanged. | |
2573 return this; | |
2574 } | |
2575 | |
2576 | |
2577 //------------------------------as_klass_type---------------------------------- | |
2578 // Return the klass type corresponding to this instance or array type. | |
2579 // It is the type that is loaded from an object of this type. | |
2580 const TypeKlassPtr* TypeOopPtr::as_klass_type() const { | |
2581 ciKlass* k = klass(); | |
2582 bool xk = klass_is_exact(); | |
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2583 if (k == NULL) |
0 | 2584 return TypeKlassPtr::OBJECT; |
2585 else | |
2586 return TypeKlassPtr::make(xk? Constant: NotNull, k, 0); | |
2587 } | |
2588 | |
12966 | 2589 const Type *TypeOopPtr::xmeet(const Type *t) const { |
2590 const Type* res = xmeet_helper(t); | |
2591 if (res->isa_oopptr() == NULL) { | |
2592 return res; | |
2593 } | |
2594 | |
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2595 const TypeOopPtr* res_oopptr = res->is_oopptr(); |
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2596 if (res_oopptr->speculative() != NULL) { |
12966 | 2597 // type->speculative() == NULL means that speculation is no better |
2598 // than type, i.e. type->speculative() == type. So there are 2 | |
2599 // ways to represent the fact that we have no useful speculative | |
2600 // data and we should use a single one to be able to test for | |
2601 // equality between types. Check whether type->speculative() == | |
2602 // type and set speculative to NULL if it is the case. | |
2603 if (res_oopptr->remove_speculative() == res_oopptr->speculative()) { | |
2604 return res_oopptr->remove_speculative(); | |
2605 } | |
2606 } | |
2607 | |
2608 return res; | |
2609 } | |
0 | 2610 |
2611 //------------------------------meet------------------------------------------- | |
2612 // Compute the MEET of two types. It returns a new Type object. | |
12966 | 2613 const Type *TypeOopPtr::xmeet_helper(const Type *t) const { |
0 | 2614 // Perform a fast test for common case; meeting the same types together. |
2615 if( this == t ) return this; // Meeting same type-rep? | |
2616 | |
2617 // Current "this->_base" is OopPtr | |
2618 switch (t->base()) { // switch on original type | |
2619 | |
2620 case Int: // Mixing ints & oops happens when javac | |
2621 case Long: // reuses local variables | |
2622 case FloatTop: | |
2623 case FloatCon: | |
2624 case FloatBot: | |
2625 case DoubleTop: | |
2626 case DoubleCon: | |
2627 case DoubleBot: | |
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2628 case NarrowOop: |
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2629 case NarrowKlass: |
0 | 2630 case Bottom: // Ye Olde Default |
2631 return Type::BOTTOM; | |
2632 case Top: | |
2633 return this; | |
2634 | |
2635 default: // All else is a mistake | |
2636 typerr(t); | |
2637 | |
2638 case RawPtr: | |
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2639 case MetadataPtr: |
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2640 case KlassPtr: |
0 | 2641 return TypePtr::BOTTOM; // Oop meet raw is not well defined |
2642 | |
2643 case AnyPtr: { | |
2644 // Found an AnyPtr type vs self-OopPtr type | |
2645 const TypePtr *tp = t->is_ptr(); | |
2646 int offset = meet_offset(tp->offset()); | |
2647 PTR ptr = meet_ptr(tp->ptr()); | |
2648 switch (tp->ptr()) { | |
2649 case Null: | |
2650 if (ptr == Null) return TypePtr::make(AnyPtr, ptr, offset); | |
2651 // else fall through: | |
2652 case TopPTR: | |
992 | 2653 case AnyNull: { |
2654 int instance_id = meet_instance_id(InstanceTop); | |
12966 | 2655 const TypeOopPtr* speculative = _speculative; |
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2656 return make(ptr, offset, instance_id, speculative, _inline_depth); |
992 | 2657 } |
0 | 2658 case BotPTR: |
2659 case NotNull: | |
2660 return TypePtr::make(AnyPtr, ptr, offset); | |
2661 default: typerr(t); | |
2662 } | |
2663 } | |
2664 | |
2665 case OopPtr: { // Meeting to other OopPtrs | |
2666 const TypeOopPtr *tp = t->is_oopptr(); | |
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2667 int instance_id = meet_instance_id(tp->instance_id()); |
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2668 const TypeOopPtr* speculative = xmeet_speculative(tp); |
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2669 int depth = meet_inline_depth(tp->inline_depth()); |
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2670 return make(meet_ptr(tp->ptr()), meet_offset(tp->offset()), instance_id, speculative, depth); |
0 | 2671 } |
2672 | |
2673 case InstPtr: // For these, flip the call around to cut down | |
2674 case AryPtr: | |
2675 return t->xmeet(this); // Call in reverse direction | |
2676 | |
2677 } // End of switch | |
2678 return this; // Return the double constant | |
2679 } | |
2680 | |
2681 | |
2682 //------------------------------xdual------------------------------------------ | |
2683 // Dual of a pure heap pointer. No relevant klass or oop information. | |
2684 const Type *TypeOopPtr::xdual() const { | |
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2685 assert(klass() == Compile::current()->env()->Object_klass(), "no klasses here"); |
0 | 2686 assert(const_oop() == NULL, "no constants here"); |
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2687 return new TypeOopPtr(_base, dual_ptr(), klass(), klass_is_exact(), const_oop(), dual_offset(), dual_instance_id(), dual_speculative(), dual_inline_depth()); |
0 | 2688 } |
2689 | |
2690 //--------------------------make_from_klass_common----------------------------- | |
2691 // Computes the element-type given a klass. | |
2692 const TypeOopPtr* TypeOopPtr::make_from_klass_common(ciKlass *klass, bool klass_change, bool try_for_exact) { | |
2693 if (klass->is_instance_klass()) { | |
2694 Compile* C = Compile::current(); | |
2695 Dependencies* deps = C->dependencies(); | |
2696 assert((deps != NULL) == (C->method() != NULL && C->method()->code_size() > 0), "sanity"); | |
2697 // Element is an instance | |
2698 bool klass_is_exact = false; | |
2699 if (klass->is_loaded()) { | |
2700 // Try to set klass_is_exact. | |
2701 ciInstanceKlass* ik = klass->as_instance_klass(); | |
2702 klass_is_exact = ik->is_final(); | |
2703 if (!klass_is_exact && klass_change | |
2704 && deps != NULL && UseUniqueSubclasses) { | |
2705 ciInstanceKlass* sub = ik->unique_concrete_subklass(); | |
2706 if (sub != NULL) { | |
2707 deps->assert_abstract_with_unique_concrete_subtype(ik, sub); | |
2708 klass = ik = sub; | |
2709 klass_is_exact = sub->is_final(); | |
2710 } | |
2711 } | |
2712 if (!klass_is_exact && try_for_exact | |
2713 && deps != NULL && UseExactTypes) { | |
2714 if (!ik->is_interface() && !ik->has_subklass()) { | |
2715 // Add a dependence; if concrete subclass added we need to recompile | |
2716 deps->assert_leaf_type(ik); | |
2717 klass_is_exact = true; | |
2718 } | |
2719 } | |
2720 } | |
2721 return TypeInstPtr::make(TypePtr::BotPTR, klass, klass_is_exact, NULL, 0); | |
2722 } else if (klass->is_obj_array_klass()) { | |
2723 // Element is an object array. Recursively call ourself. | |
2724 const TypeOopPtr *etype = TypeOopPtr::make_from_klass_common(klass->as_obj_array_klass()->element_klass(), false, try_for_exact); | |
2725 bool xk = etype->klass_is_exact(); | |
2726 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::POS); | |
2727 // We used to pass NotNull in here, asserting that the sub-arrays | |
2728 // are all not-null. This is not true in generally, as code can | |
2729 // slam NULLs down in the subarrays. | |
2730 const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::BotPTR, arr0, klass, xk, 0); | |
2731 return arr; | |
2732 } else if (klass->is_type_array_klass()) { | |
2733 // Element is an typeArray | |
2734 const Type* etype = get_const_basic_type(klass->as_type_array_klass()->element_type()); | |
2735 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::POS); | |
2736 // We used to pass NotNull in here, asserting that the array pointer | |
2737 // is not-null. That was not true in general. | |
2738 const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::BotPTR, arr0, klass, true, 0); | |
2739 return arr; | |
2740 } else { | |
2741 ShouldNotReachHere(); | |
2742 return NULL; | |
2743 } | |
2744 } | |
2745 | |
2746 //------------------------------make_from_constant----------------------------- | |
2747 // Make a java pointer from an oop constant | |
10278 | 2748 const TypeOopPtr* TypeOopPtr::make_from_constant(ciObject* o, |
2749 bool require_constant, | |
2750 bool is_autobox_cache) { | |
2751 assert(!o->is_null_object(), "null object not yet handled here."); | |
2752 ciKlass* klass = o->klass(); | |
2753 if (klass->is_instance_klass()) { | |
2754 // Element is an instance | |
2755 if (require_constant) { | |
2756 if (!o->can_be_constant()) return NULL; | |
2757 } else if (!o->should_be_constant()) { | |
2758 return TypeInstPtr::make(TypePtr::NotNull, klass, true, NULL, 0); | |
2759 } | |
2760 return TypeInstPtr::make(o); | |
2761 } else if (klass->is_obj_array_klass()) { | |
2762 // Element is an object array. Recursively call ourself. | |
2763 const TypeOopPtr *etype = | |
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2764 TypeOopPtr::make_from_klass_raw(klass->as_obj_array_klass()->element_klass()); |
10278 | 2765 if (is_autobox_cache) { |
2766 // The pointers in the autobox arrays are always non-null. | |
2767 etype = etype->cast_to_ptr_type(TypePtr::NotNull)->is_oopptr(); | |
2768 } | |
2769 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::make(o->as_array()->length())); | |
2770 // We used to pass NotNull in here, asserting that the sub-arrays | |
2771 // are all not-null. This is not true in generally, as code can | |
2772 // slam NULLs down in the subarrays. | |
2773 if (require_constant) { | |
2774 if (!o->can_be_constant()) return NULL; | |
2775 } else if (!o->should_be_constant()) { | |
2776 return TypeAryPtr::make(TypePtr::NotNull, arr0, klass, true, 0); | |
2777 } | |
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2778 const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::Constant, o, arr0, klass, true, 0, InstanceBot, NULL, InlineDepthBottom, is_autobox_cache); |
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2779 return arr; |
10278 | 2780 } else if (klass->is_type_array_klass()) { |
2781 // Element is an typeArray | |
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2782 const Type* etype = |
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2783 (Type*)get_const_basic_type(klass->as_type_array_klass()->element_type()); |
10278 | 2784 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::make(o->as_array()->length())); |
2785 // We used to pass NotNull in here, asserting that the array pointer | |
2786 // is not-null. That was not true in general. | |
2787 if (require_constant) { | |
2788 if (!o->can_be_constant()) return NULL; | |
2789 } else if (!o->should_be_constant()) { | |
2790 return TypeAryPtr::make(TypePtr::NotNull, arr0, klass, true, 0); | |
2791 } | |
6725
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2792 const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::Constant, o, arr0, klass, true, 0); |
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2793 return arr; |
0 | 2794 } |
2795 | |
6182
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2796 fatal("unhandled object type"); |
0 | 2797 return NULL; |
2798 } | |
2799 | |
2800 //------------------------------get_con---------------------------------------- | |
2801 intptr_t TypeOopPtr::get_con() const { | |
2802 assert( _ptr == Null || _ptr == Constant, "" ); | |
2803 assert( _offset >= 0, "" ); | |
2804 | |
2805 if (_offset != 0) { | |
2806 // After being ported to the compiler interface, the compiler no longer | |
2807 // directly manipulates the addresses of oops. Rather, it only has a pointer | |
2808 // to a handle at compile time. This handle is embedded in the generated | |
2809 // code and dereferenced at the time the nmethod is made. Until that time, | |
2810 // it is not reasonable to do arithmetic with the addresses of oops (we don't | |
2811 // have access to the addresses!). This does not seem to currently happen, | |
605 | 2812 // but this assertion here is to help prevent its occurence. |
0 | 2813 tty->print_cr("Found oop constant with non-zero offset"); |
2814 ShouldNotReachHere(); | |
2815 } | |
2816 | |
989
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2817 return (intptr_t)const_oop()->constant_encoding(); |
0 | 2818 } |
2819 | |
2820 | |
2821 //-----------------------------filter------------------------------------------ | |
2822 // Do not allow interface-vs.-noninterface joins to collapse to top. | |
14383
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2823 const Type *TypeOopPtr::filter_helper(const Type *kills, bool include_speculative) const { |
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2824 |
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2825 const Type* ft = join_helper(kills, include_speculative); |
0 | 2826 const TypeInstPtr* ftip = ft->isa_instptr(); |
2827 const TypeInstPtr* ktip = kills->isa_instptr(); | |
2828 | |
2829 if (ft->empty()) { | |
2830 // Check for evil case of 'this' being a class and 'kills' expecting an | |
2831 // interface. This can happen because the bytecodes do not contain | |
2832 // enough type info to distinguish a Java-level interface variable | |
2833 // from a Java-level object variable. If we meet 2 classes which | |
2834 // both implement interface I, but their meet is at 'j/l/O' which | |
2835 // doesn't implement I, we have no way to tell if the result should | |
2836 // be 'I' or 'j/l/O'. Thus we'll pick 'j/l/O'. If this then flows | |
2837 // into a Phi which "knows" it's an Interface type we'll have to | |
2838 // uplift the type. | |
2839 if (!empty() && ktip != NULL && ktip->is_loaded() && ktip->klass()->is_interface()) | |
2840 return kills; // Uplift to interface | |
2841 | |
2842 return Type::TOP; // Canonical empty value | |
2843 } | |
2844 | |
2845 // If we have an interface-typed Phi or cast and we narrow to a class type, | |
2846 // the join should report back the class. However, if we have a J/L/Object | |
2847 // class-typed Phi and an interface flows in, it's possible that the meet & | |
2848 // join report an interface back out. This isn't possible but happens | |
2849 // because the type system doesn't interact well with interfaces. | |
2850 if (ftip != NULL && ktip != NULL && | |
2851 ftip->is_loaded() && ftip->klass()->is_interface() && | |
2852 ktip->is_loaded() && !ktip->klass()->is_interface()) { | |
2853 // Happens in a CTW of rt.jar, 320-341, no extra flags | |
1335
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2854 assert(!ftip->klass_is_exact(), "interface could not be exact"); |
0 | 2855 return ktip->cast_to_ptr_type(ftip->ptr()); |
2856 } | |
2857 | |
2858 return ft; | |
2859 } | |
2860 | |
2861 //------------------------------eq--------------------------------------------- | |
2862 // Structural equality check for Type representations | |
2863 bool TypeOopPtr::eq( const Type *t ) const { | |
2864 const TypeOopPtr *a = (const TypeOopPtr*)t; | |
2865 if (_klass_is_exact != a->_klass_is_exact || | |
12966 | 2866 _instance_id != a->_instance_id || |
17731
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2867 !eq_speculative(a) || |
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2868 _inline_depth != a->_inline_depth) return false; |
0 | 2869 ciObject* one = const_oop(); |
2870 ciObject* two = a->const_oop(); | |
2871 if (one == NULL || two == NULL) { | |
2872 return (one == two) && TypePtr::eq(t); | |
2873 } else { | |
2874 return one->equals(two) && TypePtr::eq(t); | |
2875 } | |
2876 } | |
2877 | |
2878 //------------------------------hash------------------------------------------- | |
2879 // Type-specific hashing function. | |
2880 int TypeOopPtr::hash(void) const { | |
2881 return | |
2882 (const_oop() ? const_oop()->hash() : 0) + | |
2883 _klass_is_exact + | |
2884 _instance_id + | |
12966 | 2885 hash_speculative() + |
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2886 _inline_depth + |
0 | 2887 TypePtr::hash(); |
2888 } | |
2889 | |
2890 //------------------------------dump2------------------------------------------ | |
2891 #ifndef PRODUCT | |
2892 void TypeOopPtr::dump2( Dict &d, uint depth, outputStream *st ) const { | |
2893 st->print("oopptr:%s", ptr_msg[_ptr]); | |
2894 if( _klass_is_exact ) st->print(":exact"); | |
2895 if( const_oop() ) st->print(INTPTR_FORMAT, const_oop()); | |
2896 switch( _offset ) { | |
2897 case OffsetTop: st->print("+top"); break; | |
2898 case OffsetBot: st->print("+any"); break; | |
2899 case 0: break; | |
2900 default: st->print("+%d",_offset); break; | |
2901 } | |
223 | 2902 if (_instance_id == InstanceTop) |
2903 st->print(",iid=top"); | |
2904 else if (_instance_id != InstanceBot) | |
0 | 2905 st->print(",iid=%d",_instance_id); |
12966 | 2906 |
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2907 dump_inline_depth(st); |
12966 | 2908 dump_speculative(st); |
2909 } | |
2910 | |
2911 /** | |
2912 *dump the speculative part of the type | |
2913 */ | |
2914 void TypeOopPtr::dump_speculative(outputStream *st) const { | |
2915 if (_speculative != NULL) { | |
2916 st->print(" (speculative="); | |
2917 _speculative->dump_on(st); | |
2918 st->print(")"); | |
2919 } | |
0 | 2920 } |
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2921 |
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2922 void TypeOopPtr::dump_inline_depth(outputStream *st) const { |
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2923 if (_inline_depth != InlineDepthBottom) { |
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2924 if (_inline_depth == InlineDepthTop) { |
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2925 st->print(" (inline_depth=InlineDepthTop)"); |
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2926 } else { |
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2927 st->print(" (inline_depth=%d)", _inline_depth); |
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2928 } |
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|
2929 } |
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|
2930 } |
0 | 2931 #endif |
2932 | |
2933 //------------------------------singleton-------------------------------------- | |
2934 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
2935 // constants | |
2936 bool TypeOopPtr::singleton(void) const { | |
2937 // detune optimizer to not generate constant oop + constant offset as a constant! | |
2938 // TopPTR, Null, AnyNull, Constant are all singletons | |
2939 return (_offset == 0) && !below_centerline(_ptr); | |
2940 } | |
2941 | |
2942 //------------------------------add_offset------------------------------------- | |
12966 | 2943 const TypePtr *TypeOopPtr::add_offset(intptr_t offset) const { |
17731
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2944 return make(_ptr, xadd_offset(offset), _instance_id, add_offset_speculative(offset), _inline_depth); |
12966 | 2945 } |
2946 | |
2947 /** | |
2948 * Return same type without a speculative part | |
2949 */ | |
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2950 const Type* TypeOopPtr::remove_speculative() const { |
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2951 if (_speculative == NULL) { |
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2952 return this; |
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|
2953 } |
17731
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|
2954 assert(_inline_depth == InlineDepthTop || _inline_depth == InlineDepthBottom, "non speculative type shouldn't have inline depth"); |
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2955 return make(_ptr, _offset, _instance_id, NULL, _inline_depth); |
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|
2956 } |
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|
2957 |
62825ea7e51f
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|
2958 /** |
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2959 * Return same type but with a different inline depth (used for speculation) |
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2960 * |
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2961 * @param depth depth to meet with |
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|
2962 */ |
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2963 const TypeOopPtr* TypeOopPtr::with_inline_depth(int depth) const { |
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2964 if (!UseInlineDepthForSpeculativeTypes) { |
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|
2965 return this; |
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|
2966 } |
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|
2967 return make(_ptr, _offset, _instance_id, _speculative, depth); |
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|
2968 } |
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|
2969 |
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|
2970 /** |
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|
2971 * Check whether new profiling would improve speculative type |
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|
2972 * |
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|
2973 * @param exact_kls class from profiling |
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2974 * @param inline_depth inlining depth of profile point |
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|
2975 * |
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|
2976 * @return true if type profile is valuable |
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|
2977 */ |
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|
2978 bool TypeOopPtr::would_improve_type(ciKlass* exact_kls, int inline_depth) const { |
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2979 // no way to improve an already exact type |
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|
2980 if (klass_is_exact()) { |
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|
2981 return false; |
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|
2982 } |
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|
2983 // no profiling? |
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|
2984 if (exact_kls == NULL) { |
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|
2985 return false; |
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|
2986 } |
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|
2987 // no speculative type or non exact speculative type? |
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2988 if (speculative_type() == NULL) { |
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|
2989 return true; |
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|
2990 } |
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|
2991 // If the node already has an exact speculative type keep it, |
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2992 // unless it was provided by profiling that is at a deeper |
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2993 // inlining level. Profiling at a higher inlining depth is |
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2994 // expected to be less accurate. |
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|
2995 if (_speculative->inline_depth() == InlineDepthBottom) { |
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|
2996 return false; |
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|
2997 } |
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|
2998 assert(_speculative->inline_depth() != InlineDepthTop, "can't do the comparison"); |
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2999 return inline_depth < _speculative->inline_depth(); |
0 | 3000 } |
3001 | |
223 | 3002 //------------------------------meet_instance_id-------------------------------- |
3003 int TypeOopPtr::meet_instance_id( int instance_id ) const { | |
3004 // Either is 'TOP' instance? Return the other instance! | |
3005 if( _instance_id == InstanceTop ) return instance_id; | |
3006 if( instance_id == InstanceTop ) return _instance_id; | |
3007 // If either is different, return 'BOTTOM' instance | |
3008 if( _instance_id != instance_id ) return InstanceBot; | |
3009 return _instance_id; | |
0 | 3010 } |
3011 | |
223 | 3012 //------------------------------dual_instance_id-------------------------------- |
3013 int TypeOopPtr::dual_instance_id( ) const { | |
3014 if( _instance_id == InstanceTop ) return InstanceBot; // Map TOP into BOTTOM | |
3015 if( _instance_id == InstanceBot ) return InstanceTop; // Map BOTTOM into TOP | |
3016 return _instance_id; // Map everything else into self | |
3017 } | |
3018 | |
12966 | 3019 /** |
3020 * meet of the speculative parts of 2 types | |
3021 * | |
3022 * @param other type to meet with | |
3023 */ | |
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3024 const TypeOopPtr* TypeOopPtr::xmeet_speculative(const TypeOopPtr* other) const { |
12966 | 3025 bool this_has_spec = (_speculative != NULL); |
3026 bool other_has_spec = (other->speculative() != NULL); | |
3027 | |
3028 if (!this_has_spec && !other_has_spec) { | |
3029 return NULL; | |
3030 } | |
3031 | |
3032 // If we are at a point where control flow meets and one branch has | |
3033 // a speculative type and the other has not, we meet the speculative | |
3034 // type of one branch with the actual type of the other. If the | |
3035 // actual type is exact and the speculative is as well, then the | |
3036 // result is a speculative type which is exact and we can continue | |
3037 // speculation further. | |
3038 const TypeOopPtr* this_spec = _speculative; | |
3039 const TypeOopPtr* other_spec = other->speculative(); | |
3040 | |
3041 if (!this_has_spec) { | |
3042 this_spec = this; | |
3043 } | |
3044 | |
3045 if (!other_has_spec) { | |
3046 other_spec = other; | |
3047 } | |
3048 | |
14383
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3049 return this_spec->meet_speculative(other_spec)->is_oopptr(); |
12966 | 3050 } |
3051 | |
3052 /** | |
3053 * dual of the speculative part of the type | |
3054 */ | |
3055 const TypeOopPtr* TypeOopPtr::dual_speculative() const { | |
3056 if (_speculative == NULL) { | |
3057 return NULL; | |
3058 } | |
3059 return _speculative->dual()->is_oopptr(); | |
3060 } | |
3061 | |
3062 /** | |
3063 * add offset to the speculative part of the type | |
3064 * | |
3065 * @param offset offset to add | |
3066 */ | |
3067 const TypeOopPtr* TypeOopPtr::add_offset_speculative(intptr_t offset) const { | |
3068 if (_speculative == NULL) { | |
3069 return NULL; | |
3070 } | |
3071 return _speculative->add_offset(offset)->is_oopptr(); | |
3072 } | |
3073 | |
3074 /** | |
3075 * Are the speculative parts of 2 types equal? | |
3076 * | |
3077 * @param other type to compare this one to | |
3078 */ | |
3079 bool TypeOopPtr::eq_speculative(const TypeOopPtr* other) const { | |
3080 if (_speculative == NULL || other->speculative() == NULL) { | |
3081 return _speculative == other->speculative(); | |
3082 } | |
3083 | |
3084 if (_speculative->base() != other->speculative()->base()) { | |
3085 return false; | |
3086 } | |
3087 | |
3088 return _speculative->eq(other->speculative()); | |
3089 } | |
3090 | |
3091 /** | |
3092 * Hash of the speculative part of the type | |
3093 */ | |
3094 int TypeOopPtr::hash_speculative() const { | |
3095 if (_speculative == NULL) { | |
3096 return 0; | |
3097 } | |
3098 | |
3099 return _speculative->hash(); | |
3100 } | |
3101 | |
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3102 /** |
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3103 * dual of the inline depth for this type (used for speculation) |
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3104 */ |
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3105 int TypeOopPtr::dual_inline_depth() const { |
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3106 return -inline_depth(); |
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3107 } |
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3108 |
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3109 /** |
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3110 * meet of 2 inline depth (used for speculation) |
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3111 * |
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3112 * @param depth depth to meet with |
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3113 */ |
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3114 int TypeOopPtr::meet_inline_depth(int depth) const { |
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3115 return MAX2(inline_depth(), depth); |
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3116 } |
223 | 3117 |
0 | 3118 //============================================================================= |
3119 // Convenience common pre-built types. | |
3120 const TypeInstPtr *TypeInstPtr::NOTNULL; | |
3121 const TypeInstPtr *TypeInstPtr::BOTTOM; | |
3122 const TypeInstPtr *TypeInstPtr::MIRROR; | |
3123 const TypeInstPtr *TypeInstPtr::MARK; | |
3124 const TypeInstPtr *TypeInstPtr::KLASS; | |
3125 | |
3126 //------------------------------TypeInstPtr------------------------------------- | |
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3127 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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3128 : TypeOopPtr(InstPtr, ptr, k, xk, o, off, instance_id, speculative, inline_depth), _name(k->name()) { |
0 | 3129 assert(k != NULL && |
3130 (k->is_loaded() || o == NULL), | |
3131 "cannot have constants with non-loaded klass"); | |
3132 }; | |
3133 | |
3134 //------------------------------make------------------------------------------- | |
3135 const TypeInstPtr *TypeInstPtr::make(PTR ptr, | |
3136 ciKlass* k, | |
3137 bool xk, | |
3138 ciObject* o, | |
3139 int offset, | |
12966 | 3140 int instance_id, |
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3141 const TypeOopPtr* speculative, |
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3142 int inline_depth) { |
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3143 assert( !k->is_loaded() || k->is_instance_klass(), "Must be for instance"); |
0 | 3144 // Either const_oop() is NULL or else ptr is Constant |
3145 assert( (!o && ptr != Constant) || (o && ptr == Constant), | |
3146 "constant pointers must have a value supplied" ); | |
3147 // Ptr is never Null | |
3148 assert( ptr != Null, "NULL pointers are not typed" ); | |
3149 | |
247 | 3150 assert(instance_id <= 0 || xk || !UseExactTypes, "instances are always exactly typed"); |
0 | 3151 if (!UseExactTypes) xk = false; |
3152 if (ptr == Constant) { | |
3153 // Note: This case includes meta-object constants, such as methods. | |
3154 xk = true; | |
3155 } else if (k->is_loaded()) { | |
3156 ciInstanceKlass* ik = k->as_instance_klass(); | |
3157 if (!xk && ik->is_final()) xk = true; // no inexact final klass | |
3158 if (xk && ik->is_interface()) xk = false; // no exact interface | |
3159 } | |
3160 | |
3161 // Now hash this baby | |
3162 TypeInstPtr *result = | |
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3163 (TypeInstPtr*)(new TypeInstPtr(ptr, k, xk, o ,offset, instance_id, speculative, inline_depth))->hashcons(); |
0 | 3164 |
3165 return result; | |
3166 } | |
3167 | |
10278 | 3168 /** |
3169 * Create constant type for a constant boxed value | |
3170 */ | |
3171 const Type* TypeInstPtr::get_const_boxed_value() const { | |
3172 assert(is_ptr_to_boxed_value(), "should be called only for boxed value"); | |
3173 assert((const_oop() != NULL), "should be called only for constant object"); | |
3174 ciConstant constant = const_oop()->as_instance()->field_value_by_offset(offset()); | |
3175 BasicType bt = constant.basic_type(); | |
3176 switch (bt) { | |
3177 case T_BOOLEAN: return TypeInt::make(constant.as_boolean()); | |
3178 case T_INT: return TypeInt::make(constant.as_int()); | |
3179 case T_CHAR: return TypeInt::make(constant.as_char()); | |
3180 case T_BYTE: return TypeInt::make(constant.as_byte()); | |
3181 case T_SHORT: return TypeInt::make(constant.as_short()); | |
3182 case T_FLOAT: return TypeF::make(constant.as_float()); | |
3183 case T_DOUBLE: return TypeD::make(constant.as_double()); | |
3184 case T_LONG: return TypeLong::make(constant.as_long()); | |
3185 default: break; | |
3186 } | |
3187 fatal(err_msg_res("Invalid boxed value type '%s'", type2name(bt))); | |
3188 return NULL; | |
3189 } | |
0 | 3190 |
3191 //------------------------------cast_to_ptr_type------------------------------- | |
3192 const Type *TypeInstPtr::cast_to_ptr_type(PTR ptr) const { | |
3193 if( ptr == _ptr ) return this; | |
3194 // Reconstruct _sig info here since not a problem with later lazy | |
3195 // construction, _sig will show up on demand. | |
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3196 return make(ptr, klass(), klass_is_exact(), const_oop(), _offset, _instance_id, _speculative, _inline_depth); |
0 | 3197 } |
3198 | |
3199 | |
3200 //-----------------------------cast_to_exactness------------------------------- | |
3201 const Type *TypeInstPtr::cast_to_exactness(bool klass_is_exact) const { | |
3202 if( klass_is_exact == _klass_is_exact ) return this; | |
3203 if (!UseExactTypes) return this; | |
3204 if (!_klass->is_loaded()) return this; | |
3205 ciInstanceKlass* ik = _klass->as_instance_klass(); | |
3206 if( (ik->is_final() || _const_oop) ) return this; // cannot clear xk | |
3207 if( ik->is_interface() ) return this; // cannot set xk | |
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3208 return make(ptr(), klass(), klass_is_exact, const_oop(), _offset, _instance_id, _speculative, _inline_depth); |
0 | 3209 } |
3210 | |
247 | 3211 //-----------------------------cast_to_instance_id---------------------------- |
223 | 3212 const TypeOopPtr *TypeInstPtr::cast_to_instance_id(int instance_id) const { |
3213 if( instance_id == _instance_id ) return this; | |
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3214 return make(_ptr, klass(), _klass_is_exact, const_oop(), _offset, instance_id, _speculative, _inline_depth); |
0 | 3215 } |
3216 | |
3217 //------------------------------xmeet_unloaded--------------------------------- | |
3218 // Compute the MEET of two InstPtrs when at least one is unloaded. | |
3219 // Assume classes are different since called after check for same name/class-loader | |
3220 const TypeInstPtr *TypeInstPtr::xmeet_unloaded(const TypeInstPtr *tinst) const { | |
3221 int off = meet_offset(tinst->offset()); | |
3222 PTR ptr = meet_ptr(tinst->ptr()); | |
992 | 3223 int instance_id = meet_instance_id(tinst->instance_id()); |
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3224 const TypeOopPtr* speculative = xmeet_speculative(tinst); |
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3225 int depth = meet_inline_depth(tinst->inline_depth()); |
0 | 3226 |
3227 const TypeInstPtr *loaded = is_loaded() ? this : tinst; | |
3228 const TypeInstPtr *unloaded = is_loaded() ? tinst : this; | |
3229 if( loaded->klass()->equals(ciEnv::current()->Object_klass()) ) { | |
3230 // | |
3231 // Meet unloaded class with java/lang/Object | |
3232 // | |
3233 // Meet | |
3234 // | Unloaded Class | |
3235 // Object | TOP | AnyNull | Constant | NotNull | BOTTOM | | |
3236 // =================================================================== | |
3237 // TOP | ..........................Unloaded......................| | |
3238 // AnyNull | U-AN |................Unloaded......................| | |
3239 // Constant | ... O-NN .................................. | O-BOT | | |
3240 // NotNull | ... O-NN .................................. | O-BOT | | |
3241 // BOTTOM | ........................Object-BOTTOM ..................| | |
3242 // | |
3243 assert(loaded->ptr() != TypePtr::Null, "insanity check"); | |
3244 // | |
3245 if( loaded->ptr() == TypePtr::TopPTR ) { return unloaded; } | |
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3246 else if (loaded->ptr() == TypePtr::AnyNull) { return TypeInstPtr::make(ptr, unloaded->klass(), false, NULL, off, instance_id, speculative, depth); } |
0 | 3247 else if (loaded->ptr() == TypePtr::BotPTR ) { return TypeInstPtr::BOTTOM; } |
3248 else if (loaded->ptr() == TypePtr::Constant || loaded->ptr() == TypePtr::NotNull) { | |
3249 if (unloaded->ptr() == TypePtr::BotPTR ) { return TypeInstPtr::BOTTOM; } | |
3250 else { return TypeInstPtr::NOTNULL; } | |
3251 } | |
3252 else if( unloaded->ptr() == TypePtr::TopPTR ) { return unloaded; } | |
3253 | |
3254 return unloaded->cast_to_ptr_type(TypePtr::AnyNull)->is_instptr(); | |
3255 } | |
3256 | |
3257 // Both are unloaded, not the same class, not Object | |
3258 // Or meet unloaded with a different loaded class, not java/lang/Object | |
3259 if( ptr != TypePtr::BotPTR ) { | |
3260 return TypeInstPtr::NOTNULL; | |
3261 } | |
3262 return TypeInstPtr::BOTTOM; | |
3263 } | |
3264 | |
3265 | |
3266 //------------------------------meet------------------------------------------- | |
3267 // Compute the MEET of two types. It returns a new Type object. | |
12966 | 3268 const Type *TypeInstPtr::xmeet_helper(const Type *t) const { |
0 | 3269 // Perform a fast test for common case; meeting the same types together. |
3270 if( this == t ) return this; // Meeting same type-rep? | |
3271 | |
3272 // Current "this->_base" is Pointer | |
3273 switch (t->base()) { // switch on original type | |
3274 | |
3275 case Int: // Mixing ints & oops happens when javac | |
3276 case Long: // reuses local variables | |
3277 case FloatTop: | |
3278 case FloatCon: | |
3279 case FloatBot: | |
3280 case DoubleTop: | |
3281 case DoubleCon: | |
3282 case DoubleBot: | |
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3283 case NarrowOop: |
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3284 case NarrowKlass: |
0 | 3285 case Bottom: // Ye Olde Default |
3286 return Type::BOTTOM; | |
3287 case Top: | |
3288 return this; | |
3289 | |
3290 default: // All else is a mistake | |
3291 typerr(t); | |
3292 | |
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3293 case MetadataPtr: |
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3294 case KlassPtr: |
0 | 3295 case RawPtr: return TypePtr::BOTTOM; |
3296 | |
3297 case AryPtr: { // All arrays inherit from Object class | |
3298 const TypeAryPtr *tp = t->is_aryptr(); | |
3299 int offset = meet_offset(tp->offset()); | |
3300 PTR ptr = meet_ptr(tp->ptr()); | |
223 | 3301 int instance_id = meet_instance_id(tp->instance_id()); |
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3302 const TypeOopPtr* speculative = xmeet_speculative(tp); |
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3303 int depth = meet_inline_depth(tp->inline_depth()); |
0 | 3304 switch (ptr) { |
3305 case TopPTR: | |
3306 case AnyNull: // Fall 'down' to dual of object klass | |
12966 | 3307 // For instances when a subclass meets a superclass we fall |
3308 // below the centerline when the superclass is exact. We need to | |
3309 // do the same here. | |
3310 if (klass()->equals(ciEnv::current()->Object_klass()) && !klass_is_exact()) { | |
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3311 return TypeAryPtr::make(ptr, tp->ary(), tp->klass(), tp->klass_is_exact(), offset, instance_id, speculative, depth); |
0 | 3312 } else { |
3313 // cannot subclass, so the meet has to fall badly below the centerline | |
3314 ptr = NotNull; | |
223 | 3315 instance_id = InstanceBot; |
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3316 return TypeInstPtr::make( ptr, ciEnv::current()->Object_klass(), false, NULL, offset, instance_id, speculative, depth); |
0 | 3317 } |
3318 case Constant: | |
3319 case NotNull: | |
3320 case BotPTR: // Fall down to object klass | |
3321 // LCA is object_klass, but if we subclass from the top we can do better | |
3322 if( above_centerline(_ptr) ) { // if( _ptr == TopPTR || _ptr == AnyNull ) | |
3323 // If 'this' (InstPtr) is above the centerline and it is Object class | |
605 | 3324 // then we can subclass in the Java class hierarchy. |
12966 | 3325 // For instances when a subclass meets a superclass we fall |
3326 // below the centerline when the superclass is exact. We need | |
3327 // to do the same here. | |
3328 if (klass()->equals(ciEnv::current()->Object_klass()) && !klass_is_exact()) { | |
0 | 3329 // that is, tp's array type is a subtype of my klass |
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3330 return TypeAryPtr::make(ptr, (ptr == Constant ? tp->const_oop() : NULL), |
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3331 tp->ary(), tp->klass(), tp->klass_is_exact(), offset, instance_id, speculative, depth); |
0 | 3332 } |
3333 } | |
3334 // The other case cannot happen, since I cannot be a subtype of an array. | |
3335 // The meet falls down to Object class below centerline. | |
3336 if( ptr == Constant ) | |
3337 ptr = NotNull; | |
223 | 3338 instance_id = InstanceBot; |
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3339 return make(ptr, ciEnv::current()->Object_klass(), false, NULL, offset, instance_id, speculative, depth); |
0 | 3340 default: typerr(t); |
3341 } | |
3342 } | |
3343 | |
3344 case OopPtr: { // Meeting to OopPtrs | |
3345 // Found a OopPtr type vs self-InstPtr type | |
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3346 const TypeOopPtr *tp = t->is_oopptr(); |
0 | 3347 int offset = meet_offset(tp->offset()); |
3348 PTR ptr = meet_ptr(tp->ptr()); | |
3349 switch (tp->ptr()) { | |
3350 case TopPTR: | |
223 | 3351 case AnyNull: { |
3352 int instance_id = meet_instance_id(InstanceTop); | |
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3353 const TypeOopPtr* speculative = xmeet_speculative(tp); |
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3354 int depth = meet_inline_depth(tp->inline_depth()); |
0 | 3355 return make(ptr, klass(), klass_is_exact(), |
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3356 (ptr == Constant ? const_oop() : NULL), offset, instance_id, speculative, depth); |
223 | 3357 } |
0 | 3358 case NotNull: |
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3359 case BotPTR: { |
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3360 int instance_id = meet_instance_id(tp->instance_id()); |
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3361 const TypeOopPtr* speculative = xmeet_speculative(tp); |
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3362 int depth = meet_inline_depth(tp->inline_depth()); |
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3363 return TypeOopPtr::make(ptr, offset, instance_id, speculative, depth); |
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3364 } |
0 | 3365 default: typerr(t); |
3366 } | |
3367 } | |
3368 | |
3369 case AnyPtr: { // Meeting to AnyPtrs | |
3370 // Found an AnyPtr type vs self-InstPtr type | |
3371 const TypePtr *tp = t->is_ptr(); | |
3372 int offset = meet_offset(tp->offset()); | |
3373 PTR ptr = meet_ptr(tp->ptr()); | |
3374 switch (tp->ptr()) { | |
3375 case Null: | |
12966 | 3376 if( ptr == Null ) return TypePtr::make(AnyPtr, ptr, offset); |
223 | 3377 // else fall through to AnyNull |
0 | 3378 case TopPTR: |
223 | 3379 case AnyNull: { |
3380 int instance_id = meet_instance_id(InstanceTop); | |
12966 | 3381 const TypeOopPtr* speculative = _speculative; |
3382 return make(ptr, klass(), klass_is_exact(), | |
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3383 (ptr == Constant ? const_oop() : NULL), offset, instance_id, speculative, _inline_depth); |
223 | 3384 } |
0 | 3385 case NotNull: |
3386 case BotPTR: | |
12966 | 3387 return TypePtr::make(AnyPtr, ptr, offset); |
0 | 3388 default: typerr(t); |
3389 } | |
3390 } | |
3391 | |
3392 /* | |
3393 A-top } | |
3394 / | \ } Tops | |
3395 B-top A-any C-top } | |
3396 | / | \ | } Any-nulls | |
3397 B-any | C-any } | |
3398 | | | | |
3399 B-con A-con C-con } constants; not comparable across classes | |
3400 | | | | |
3401 B-not | C-not } | |
3402 | \ | / | } not-nulls | |
3403 B-bot A-not C-bot } | |
3404 \ | / } Bottoms | |
3405 A-bot } | |
3406 */ | |
3407 | |
3408 case InstPtr: { // Meeting 2 Oops? | |
3409 // Found an InstPtr sub-type vs self-InstPtr type | |
3410 const TypeInstPtr *tinst = t->is_instptr(); | |
3411 int off = meet_offset( tinst->offset() ); | |
3412 PTR ptr = meet_ptr( tinst->ptr() ); | |
223 | 3413 int instance_id = meet_instance_id(tinst->instance_id()); |
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3414 const TypeOopPtr* speculative = xmeet_speculative(tinst); |
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3415 int depth = meet_inline_depth(tinst->inline_depth()); |
0 | 3416 |
3417 // Check for easy case; klasses are equal (and perhaps not loaded!) | |
3418 // If we have constants, then we created oops so classes are loaded | |
3419 // and we can handle the constants further down. This case handles | |
3420 // both-not-loaded or both-loaded classes | |
3421 if (ptr != Constant && klass()->equals(tinst->klass()) && klass_is_exact() == tinst->klass_is_exact()) { | |
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3422 return make(ptr, klass(), klass_is_exact(), NULL, off, instance_id, speculative, depth); |
0 | 3423 } |
3424 | |
3425 // Classes require inspection in the Java klass hierarchy. Must be loaded. | |
3426 ciKlass* tinst_klass = tinst->klass(); | |
3427 ciKlass* this_klass = this->klass(); | |
3428 bool tinst_xk = tinst->klass_is_exact(); | |
3429 bool this_xk = this->klass_is_exact(); | |
3430 if (!tinst_klass->is_loaded() || !this_klass->is_loaded() ) { | |
3431 // One of these classes has not been loaded | |
3432 const TypeInstPtr *unloaded_meet = xmeet_unloaded(tinst); | |
3433 #ifndef PRODUCT | |
3434 if( PrintOpto && Verbose ) { | |
3435 tty->print("meet of unloaded classes resulted in: "); unloaded_meet->dump(); tty->cr(); | |
3436 tty->print(" this == "); this->dump(); tty->cr(); | |
3437 tty->print(" tinst == "); tinst->dump(); tty->cr(); | |
3438 } | |
3439 #endif | |
3440 return unloaded_meet; | |
3441 } | |
3442 | |
3443 // Handle mixing oops and interfaces first. | |
12966 | 3444 if( this_klass->is_interface() && !(tinst_klass->is_interface() || |
3445 tinst_klass == ciEnv::current()->Object_klass())) { | |
0 | 3446 ciKlass *tmp = tinst_klass; // Swap interface around |
3447 tinst_klass = this_klass; | |
3448 this_klass = tmp; | |
3449 bool tmp2 = tinst_xk; | |
3450 tinst_xk = this_xk; | |
3451 this_xk = tmp2; | |
3452 } | |
3453 if (tinst_klass->is_interface() && | |
3454 !(this_klass->is_interface() || | |
3455 // Treat java/lang/Object as an honorary interface, | |
3456 // because we need a bottom for the interface hierarchy. | |
3457 this_klass == ciEnv::current()->Object_klass())) { | |
3458 // Oop meets interface! | |
3459 | |
3460 // See if the oop subtypes (implements) interface. | |
3461 ciKlass *k; | |
3462 bool xk; | |
3463 if( this_klass->is_subtype_of( tinst_klass ) ) { | |
3464 // Oop indeed subtypes. Now keep oop or interface depending | |
3465 // on whether we are both above the centerline or either is | |
3466 // below the centerline. If we are on the centerline | |
3467 // (e.g., Constant vs. AnyNull interface), use the constant. | |
3468 k = below_centerline(ptr) ? tinst_klass : this_klass; | |
3469 // If we are keeping this_klass, keep its exactness too. | |
3470 xk = below_centerline(ptr) ? tinst_xk : this_xk; | |
3471 } else { // Does not implement, fall to Object | |
3472 // Oop does not implement interface, so mixing falls to Object | |
3473 // just like the verifier does (if both are above the | |
3474 // centerline fall to interface) | |
3475 k = above_centerline(ptr) ? tinst_klass : ciEnv::current()->Object_klass(); | |
3476 xk = above_centerline(ptr) ? tinst_xk : false; | |
3477 // Watch out for Constant vs. AnyNull interface. | |
3478 if (ptr == Constant) ptr = NotNull; // forget it was a constant | |
247 | 3479 instance_id = InstanceBot; |
0 | 3480 } |
3481 ciObject* o = NULL; // the Constant value, if any | |
3482 if (ptr == Constant) { | |
3483 // Find out which constant. | |
3484 o = (this_klass == klass()) ? const_oop() : tinst->const_oop(); | |
3485 } | |
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3486 return make(ptr, k, xk, o, off, instance_id, speculative, depth); |
0 | 3487 } |
3488 | |
3489 // Either oop vs oop or interface vs interface or interface vs Object | |
3490 | |
3491 // !!! Here's how the symmetry requirement breaks down into invariants: | |
3492 // If we split one up & one down AND they subtype, take the down man. | |
3493 // If we split one up & one down AND they do NOT subtype, "fall hard". | |
3494 // If both are up and they subtype, take the subtype class. | |
3495 // If both are up and they do NOT subtype, "fall hard". | |
3496 // If both are down and they subtype, take the supertype class. | |
3497 // If both are down and they do NOT subtype, "fall hard". | |
3498 // Constants treated as down. | |
3499 | |
3500 // Now, reorder the above list; observe that both-down+subtype is also | |
3501 // "fall hard"; "fall hard" becomes the default case: | |
3502 // If we split one up & one down AND they subtype, take the down man. | |
3503 // If both are up and they subtype, take the subtype class. | |
3504 | |
3505 // If both are down and they subtype, "fall hard". | |
3506 // If both are down and they do NOT subtype, "fall hard". | |
3507 // If both are up and they do NOT subtype, "fall hard". | |
3508 // If we split one up & one down AND they do NOT subtype, "fall hard". | |
3509 | |
3510 // If a proper subtype is exact, and we return it, we return it exactly. | |
3511 // If a proper supertype is exact, there can be no subtyping relationship! | |
3512 // If both types are equal to the subtype, exactness is and-ed below the | |
3513 // centerline and or-ed above it. (N.B. Constants are always exact.) | |
3514 | |
3515 // Check for subtyping: | |
3516 ciKlass *subtype = NULL; | |
3517 bool subtype_exact = false; | |
3518 if( tinst_klass->equals(this_klass) ) { | |
3519 subtype = this_klass; | |
3520 subtype_exact = below_centerline(ptr) ? (this_xk & tinst_xk) : (this_xk | tinst_xk); | |
3521 } else if( !tinst_xk && this_klass->is_subtype_of( tinst_klass ) ) { | |
3522 subtype = this_klass; // Pick subtyping class | |
3523 subtype_exact = this_xk; | |
3524 } else if( !this_xk && tinst_klass->is_subtype_of( this_klass ) ) { | |
3525 subtype = tinst_klass; // Pick subtyping class | |
3526 subtype_exact = tinst_xk; | |
3527 } | |
3528 | |
3529 if( subtype ) { | |
3530 if( above_centerline(ptr) ) { // both are up? | |
3531 this_klass = tinst_klass = subtype; | |
3532 this_xk = tinst_xk = subtype_exact; | |
3533 } else if( above_centerline(this ->_ptr) && !above_centerline(tinst->_ptr) ) { | |
3534 this_klass = tinst_klass; // tinst is down; keep down man | |
3535 this_xk = tinst_xk; | |
3536 } else if( above_centerline(tinst->_ptr) && !above_centerline(this ->_ptr) ) { | |
3537 tinst_klass = this_klass; // this is down; keep down man | |
3538 tinst_xk = this_xk; | |
3539 } else { | |
3540 this_xk = subtype_exact; // either they are equal, or we'll do an LCA | |
3541 } | |
3542 } | |
3543 | |
3544 // Check for classes now being equal | |
3545 if (tinst_klass->equals(this_klass)) { | |
3546 // If the klasses are equal, the constants may still differ. Fall to | |
3547 // NotNull if they do (neither constant is NULL; that is a special case | |
3548 // handled elsewhere). | |
3549 ciObject* o = NULL; // Assume not constant when done | |
3550 ciObject* this_oop = const_oop(); | |
3551 ciObject* tinst_oop = tinst->const_oop(); | |
3552 if( ptr == Constant ) { | |
3553 if (this_oop != NULL && tinst_oop != NULL && | |
3554 this_oop->equals(tinst_oop) ) | |
3555 o = this_oop; | |
3556 else if (above_centerline(this ->_ptr)) | |
3557 o = tinst_oop; | |
3558 else if (above_centerline(tinst ->_ptr)) | |
3559 o = this_oop; | |
3560 else | |
3561 ptr = NotNull; | |
3562 } | |
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3563 return make(ptr, this_klass, this_xk, o, off, instance_id, speculative, depth); |
0 | 3564 } // Else classes are not equal |
3565 | |
3566 // Since klasses are different, we require a LCA in the Java | |
3567 // class hierarchy - which means we have to fall to at least NotNull. | |
3568 if( ptr == TopPTR || ptr == AnyNull || ptr == Constant ) | |
3569 ptr = NotNull; | |
247 | 3570 instance_id = InstanceBot; |
0 | 3571 |
3572 // Now we find the LCA of Java classes | |
3573 ciKlass* k = this_klass->least_common_ancestor(tinst_klass); | |
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3574 return make(ptr, k, false, NULL, off, instance_id, speculative, depth); |
0 | 3575 } // End of case InstPtr |
3576 | |
3577 } // End of switch | |
3578 return this; // Return the double constant | |
3579 } | |
3580 | |
3581 | |
3582 //------------------------java_mirror_type-------------------------------------- | |
3583 ciType* TypeInstPtr::java_mirror_type() const { | |
3584 // must be a singleton type | |
3585 if( const_oop() == NULL ) return NULL; | |
3586 | |
3587 // must be of type java.lang.Class | |
3588 if( klass() != ciEnv::current()->Class_klass() ) return NULL; | |
3589 | |
3590 return const_oop()->as_instance()->java_mirror_type(); | |
3591 } | |
3592 | |
3593 | |
3594 //------------------------------xdual------------------------------------------ | |
3595 // Dual: do NOT dual on klasses. This means I do NOT understand the Java | |
605 | 3596 // inheritance mechanism. |
0 | 3597 const Type *TypeInstPtr::xdual() const { |
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3598 return new TypeInstPtr(dual_ptr(), klass(), klass_is_exact(), const_oop(), dual_offset(), dual_instance_id(), dual_speculative(), dual_inline_depth()); |
0 | 3599 } |
3600 | |
3601 //------------------------------eq--------------------------------------------- | |
3602 // Structural equality check for Type representations | |
3603 bool TypeInstPtr::eq( const Type *t ) const { | |
3604 const TypeInstPtr *p = t->is_instptr(); | |
3605 return | |
3606 klass()->equals(p->klass()) && | |
3607 TypeOopPtr::eq(p); // Check sub-type stuff | |
3608 } | |
3609 | |
3610 //------------------------------hash------------------------------------------- | |
3611 // Type-specific hashing function. | |
3612 int TypeInstPtr::hash(void) const { | |
3613 int hash = klass()->hash() + TypeOopPtr::hash(); | |
3614 return hash; | |
3615 } | |
3616 | |
3617 //------------------------------dump2------------------------------------------ | |
3618 // Dump oop Type | |
3619 #ifndef PRODUCT | |
3620 void TypeInstPtr::dump2( Dict &d, uint depth, outputStream *st ) const { | |
3621 // Print the name of the klass. | |
3622 klass()->print_name_on(st); | |
3623 | |
3624 switch( _ptr ) { | |
3625 case Constant: | |
3626 // TO DO: Make CI print the hex address of the underlying oop. | |
3627 if (WizardMode || Verbose) { | |
3628 const_oop()->print_oop(st); | |
3629 } | |
3630 case BotPTR: | |
3631 if (!WizardMode && !Verbose) { | |
3632 if( _klass_is_exact ) st->print(":exact"); | |
3633 break; | |
3634 } | |
3635 case TopPTR: | |
3636 case AnyNull: | |
3637 case NotNull: | |
3638 st->print(":%s", ptr_msg[_ptr]); | |
3639 if( _klass_is_exact ) st->print(":exact"); | |
3640 break; | |
3641 } | |
3642 | |
3643 if( _offset ) { // Dump offset, if any | |
3644 if( _offset == OffsetBot ) st->print("+any"); | |
3645 else if( _offset == OffsetTop ) st->print("+unknown"); | |
3646 else st->print("+%d", _offset); | |
3647 } | |
3648 | |
3649 st->print(" *"); | |
223 | 3650 if (_instance_id == InstanceTop) |
3651 st->print(",iid=top"); | |
3652 else if (_instance_id != InstanceBot) | |
0 | 3653 st->print(",iid=%d",_instance_id); |
12966 | 3654 |
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3655 dump_inline_depth(st); |
12966 | 3656 dump_speculative(st); |
0 | 3657 } |
3658 #endif | |
3659 | |
3660 //------------------------------add_offset------------------------------------- | |
12966 | 3661 const TypePtr *TypeInstPtr::add_offset(intptr_t offset) const { |
3662 return make(_ptr, klass(), klass_is_exact(), const_oop(), xadd_offset(offset), _instance_id, add_offset_speculative(offset)); | |
3663 } | |
3664 | |
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3665 const Type *TypeInstPtr::remove_speculative() const { |
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3666 if (_speculative == NULL) { |
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3667 return this; |
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3668 } |
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3669 assert(_inline_depth == InlineDepthTop || _inline_depth == InlineDepthBottom, "non speculative type shouldn't have inline depth"); |
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3670 return make(_ptr, klass(), klass_is_exact(), const_oop(), _offset, _instance_id, NULL, _inline_depth); |
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3671 } |
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3672 |
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3673 const TypeOopPtr *TypeInstPtr::with_inline_depth(int depth) const { |
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3674 if (!UseInlineDepthForSpeculativeTypes) { |
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3675 return this; |
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|
3676 } |
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3677 return make(_ptr, klass(), klass_is_exact(), const_oop(), _offset, _instance_id, _speculative, depth); |
0 | 3678 } |
3679 | |
3680 //============================================================================= | |
3681 // Convenience common pre-built types. | |
3682 const TypeAryPtr *TypeAryPtr::RANGE; | |
3683 const TypeAryPtr *TypeAryPtr::OOPS; | |
163 | 3684 const TypeAryPtr *TypeAryPtr::NARROWOOPS; |
0 | 3685 const TypeAryPtr *TypeAryPtr::BYTES; |
3686 const TypeAryPtr *TypeAryPtr::SHORTS; | |
3687 const TypeAryPtr *TypeAryPtr::CHARS; | |
3688 const TypeAryPtr *TypeAryPtr::INTS; | |
3689 const TypeAryPtr *TypeAryPtr::LONGS; | |
3690 const TypeAryPtr *TypeAryPtr::FLOATS; | |
3691 const TypeAryPtr *TypeAryPtr::DOUBLES; | |
3692 | |
3693 //------------------------------make------------------------------------------- | |
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3694 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 | 3695 assert(!(k == NULL && ary->_elem->isa_int()), |
3696 "integral arrays must be pre-equipped with a class"); | |
3697 if (!xk) xk = ary->ary_must_be_exact(); | |
247 | 3698 assert(instance_id <= 0 || xk || !UseExactTypes, "instances are always exactly typed"); |
0 | 3699 if (!UseExactTypes) xk = (ptr == Constant); |
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3700 return (TypeAryPtr*)(new TypeAryPtr(ptr, NULL, ary, k, xk, offset, instance_id, false, speculative, inline_depth))->hashcons(); |
0 | 3701 } |
3702 | |
3703 //------------------------------make------------------------------------------- | |
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3704 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 | 3705 assert(!(k == NULL && ary->_elem->isa_int()), |
3706 "integral arrays must be pre-equipped with a class"); | |
3707 assert( (ptr==Constant && o) || (ptr!=Constant && !o), "" ); | |
3708 if (!xk) xk = (o != NULL) || ary->ary_must_be_exact(); | |
247 | 3709 assert(instance_id <= 0 || xk || !UseExactTypes, "instances are always exactly typed"); |
0 | 3710 if (!UseExactTypes) xk = (ptr == Constant); |
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3711 return (TypeAryPtr*)(new TypeAryPtr(ptr, o, ary, k, xk, offset, instance_id, is_autobox_cache, speculative, inline_depth))->hashcons(); |
0 | 3712 } |
3713 | |
3714 //------------------------------cast_to_ptr_type------------------------------- | |
3715 const Type *TypeAryPtr::cast_to_ptr_type(PTR ptr) const { | |
3716 if( ptr == _ptr ) return this; | |
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3717 return make(ptr, const_oop(), _ary, klass(), klass_is_exact(), _offset, _instance_id, _speculative, _inline_depth); |
0 | 3718 } |
3719 | |
3720 | |
3721 //-----------------------------cast_to_exactness------------------------------- | |
3722 const Type *TypeAryPtr::cast_to_exactness(bool klass_is_exact) const { | |
3723 if( klass_is_exact == _klass_is_exact ) return this; | |
3724 if (!UseExactTypes) return this; | |
3725 if (_ary->ary_must_be_exact()) return this; // cannot clear xk | |
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3726 return make(ptr(), const_oop(), _ary, klass(), klass_is_exact, _offset, _instance_id, _speculative, _inline_depth); |
0 | 3727 } |
3728 | |
247 | 3729 //-----------------------------cast_to_instance_id---------------------------- |
223 | 3730 const TypeOopPtr *TypeAryPtr::cast_to_instance_id(int instance_id) const { |
3731 if( instance_id == _instance_id ) return this; | |
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3732 return make(_ptr, const_oop(), _ary, klass(), _klass_is_exact, _offset, instance_id, _speculative, _inline_depth); |
0 | 3733 } |
3734 | |
3735 //-----------------------------narrow_size_type------------------------------- | |
3736 // Local cache for arrayOopDesc::max_array_length(etype), | |
3737 // which is kind of slow (and cached elsewhere by other users). | |
3738 static jint max_array_length_cache[T_CONFLICT+1]; | |
3739 static jint max_array_length(BasicType etype) { | |
3740 jint& cache = max_array_length_cache[etype]; | |
3741 jint res = cache; | |
3742 if (res == 0) { | |
3743 switch (etype) { | |
113
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3744 case T_NARROWOOP: |
ba764ed4b6f2
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3745 etype = T_OBJECT; |
ba764ed4b6f2
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|
3746 break; |
6848
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|
3747 case T_NARROWKLASS: |
0 | 3748 case T_CONFLICT: |
3749 case T_ILLEGAL: | |
3750 case T_VOID: | |
3751 etype = T_BYTE; // will produce conservatively high value | |
3752 } | |
3753 cache = res = arrayOopDesc::max_array_length(etype); | |
3754 } | |
3755 return res; | |
3756 } | |
3757 | |
3758 // Narrow the given size type to the index range for the given array base type. | |
3759 // Return NULL if the resulting int type becomes empty. | |
366
8261ee795323
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3760 const TypeInt* TypeAryPtr::narrow_size_type(const TypeInt* size) const { |
0 | 3761 jint hi = size->_hi; |
3762 jint lo = size->_lo; | |
3763 jint min_lo = 0; | |
366
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3764 jint max_hi = max_array_length(elem()->basic_type()); |
0 | 3765 //if (index_not_size) --max_hi; // type of a valid array index, FTR |
3766 bool chg = false; | |
10278 | 3767 if (lo < min_lo) { |
3768 lo = min_lo; | |
3769 if (size->is_con()) { | |
3770 hi = lo; | |
3771 } | |
3772 chg = true; | |
3773 } | |
3774 if (hi > max_hi) { | |
3775 hi = max_hi; | |
3776 if (size->is_con()) { | |
3777 lo = hi; | |
3778 } | |
3779 chg = true; | |
3780 } | |
605 | 3781 // Negative length arrays will produce weird intermediate dead fast-path code |
0 | 3782 if (lo > hi) |
366
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3783 return TypeInt::ZERO; |
0 | 3784 if (!chg) |
3785 return size; | |
3786 return TypeInt::make(lo, hi, Type::WidenMin); | |
3787 } | |
3788 | |
3789 //-------------------------------cast_to_size---------------------------------- | |
3790 const TypeAryPtr* TypeAryPtr::cast_to_size(const TypeInt* new_size) const { | |
3791 assert(new_size != NULL, ""); | |
366
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3792 new_size = narrow_size_type(new_size); |
0 | 3793 if (new_size == size()) return this; |
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3794 const TypeAry* new_ary = TypeAry::make(elem(), new_size, is_stable()); |
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3795 return make(ptr(), const_oop(), new_ary, klass(), klass_is_exact(), _offset, _instance_id, _speculative, _inline_depth); |
0 | 3796 } |
3797 | |
3798 | |
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3799 //------------------------------cast_to_stable--------------------------------- |
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3800 const TypeAryPtr* TypeAryPtr::cast_to_stable(bool stable, int stable_dimension) const { |
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3801 if (stable_dimension <= 0 || (stable_dimension == 1 && stable == this->is_stable())) |
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3802 return this; |
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3803 |
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3804 const Type* elem = this->elem(); |
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3805 const TypePtr* elem_ptr = elem->make_ptr(); |
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3806 |
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3807 if (stable_dimension > 1 && elem_ptr != NULL && elem_ptr->isa_aryptr()) { |
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3808 // If this is widened from a narrow oop, TypeAry::make will re-narrow it. |
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3809 elem = elem_ptr = elem_ptr->is_aryptr()->cast_to_stable(stable, stable_dimension - 1); |
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3810 } |
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3811 |
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3812 const TypeAry* new_ary = TypeAry::make(elem, size(), stable); |
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3813 |
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3814 return make(ptr(), const_oop(), new_ary, klass(), klass_is_exact(), _offset, _instance_id); |
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3815 } |
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3816 |
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3817 //-----------------------------stable_dimension-------------------------------- |
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3818 int TypeAryPtr::stable_dimension() const { |
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3819 if (!is_stable()) return 0; |
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3820 int dim = 1; |
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3821 const TypePtr* elem_ptr = elem()->make_ptr(); |
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3822 if (elem_ptr != NULL && elem_ptr->isa_aryptr()) |
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3823 dim += elem_ptr->is_aryptr()->stable_dimension(); |
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3824 return dim; |
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|
3825 } |
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|
3826 |
0 | 3827 //------------------------------eq--------------------------------------------- |
3828 // Structural equality check for Type representations | |
3829 bool TypeAryPtr::eq( const Type *t ) const { | |
3830 const TypeAryPtr *p = t->is_aryptr(); | |
3831 return | |
3832 _ary == p->_ary && // Check array | |
3833 TypeOopPtr::eq(p); // Check sub-parts | |
3834 } | |
3835 | |
3836 //------------------------------hash------------------------------------------- | |
3837 // Type-specific hashing function. | |
3838 int TypeAryPtr::hash(void) const { | |
3839 return (intptr_t)_ary + TypeOopPtr::hash(); | |
3840 } | |
3841 | |
3842 //------------------------------meet------------------------------------------- | |
3843 // Compute the MEET of two types. It returns a new Type object. | |
12966 | 3844 const Type *TypeAryPtr::xmeet_helper(const Type *t) const { |
0 | 3845 // Perform a fast test for common case; meeting the same types together. |
3846 if( this == t ) return this; // Meeting same type-rep? | |
3847 // Current "this->_base" is Pointer | |
3848 switch (t->base()) { // switch on original type | |
3849 | |
3850 // Mixing ints & oops happens when javac reuses local variables | |
3851 case Int: | |
3852 case Long: | |
3853 case FloatTop: | |
3854 case FloatCon: | |
3855 case FloatBot: | |
3856 case DoubleTop: | |
3857 case DoubleCon: | |
3858 case DoubleBot: | |
113
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3859 case NarrowOop: |
6848
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3860 case NarrowKlass: |
0 | 3861 case Bottom: // Ye Olde Default |
3862 return Type::BOTTOM; | |
3863 case Top: | |
3864 return this; | |
3865 | |
3866 default: // All else is a mistake | |
3867 typerr(t); | |
3868 | |
3869 case OopPtr: { // Meeting to OopPtrs | |
3870 // Found a OopPtr type vs self-AryPtr type | |
958
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3871 const TypeOopPtr *tp = t->is_oopptr(); |
0 | 3872 int offset = meet_offset(tp->offset()); |
3873 PTR ptr = meet_ptr(tp->ptr()); | |
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3874 int depth = meet_inline_depth(tp->inline_depth()); |
0 | 3875 switch (tp->ptr()) { |
3876 case TopPTR: | |
223 | 3877 case AnyNull: { |
3878 int instance_id = meet_instance_id(InstanceTop); | |
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3879 const TypeOopPtr* speculative = xmeet_speculative(tp); |
223 | 3880 return make(ptr, (ptr == Constant ? const_oop() : NULL), |
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3881 _ary, _klass, _klass_is_exact, offset, instance_id, speculative, depth); |
223 | 3882 } |
0 | 3883 case BotPTR: |
958
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3884 case NotNull: { |
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3885 int instance_id = meet_instance_id(tp->instance_id()); |
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3886 const TypeOopPtr* speculative = xmeet_speculative(tp); |
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3887 return TypeOopPtr::make(ptr, offset, instance_id, speculative, depth); |
958
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|
3888 } |
0 | 3889 default: ShouldNotReachHere(); |
3890 } | |
3891 } | |
3892 | |
3893 case AnyPtr: { // Meeting two AnyPtrs | |
3894 // Found an AnyPtr type vs self-AryPtr type | |
3895 const TypePtr *tp = t->is_ptr(); | |
3896 int offset = meet_offset(tp->offset()); | |
3897 PTR ptr = meet_ptr(tp->ptr()); | |
3898 switch (tp->ptr()) { | |
3899 case TopPTR: | |
3900 return this; | |
3901 case BotPTR: | |
3902 case NotNull: | |
3903 return TypePtr::make(AnyPtr, ptr, offset); | |
3904 case Null: | |
3905 if( ptr == Null ) return TypePtr::make(AnyPtr, ptr, offset); | |
223 | 3906 // else fall through to AnyNull |
3907 case AnyNull: { | |
3908 int instance_id = meet_instance_id(InstanceTop); | |
12966 | 3909 const TypeOopPtr* speculative = _speculative; |
3910 return make(ptr, (ptr == Constant ? const_oop() : NULL), | |
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3911 _ary, _klass, _klass_is_exact, offset, instance_id, speculative, _inline_depth); |
223 | 3912 } |
0 | 3913 default: ShouldNotReachHere(); |
3914 } | |
3915 } | |
3916 | |
6725
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3917 case MetadataPtr: |
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3918 case KlassPtr: |
0 | 3919 case RawPtr: return TypePtr::BOTTOM; |
3920 | |
3921 case AryPtr: { // Meeting 2 references? | |
3922 const TypeAryPtr *tap = t->is_aryptr(); | |
3923 int off = meet_offset(tap->offset()); | |
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3924 const TypeAry *tary = _ary->meet_speculative(tap->_ary)->is_ary(); |
0 | 3925 PTR ptr = meet_ptr(tap->ptr()); |
223 | 3926 int instance_id = meet_instance_id(tap->instance_id()); |
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3927 const TypeOopPtr* speculative = xmeet_speculative(tap); |
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3928 int depth = meet_inline_depth(tap->inline_depth()); |
0 | 3929 ciKlass* lazy_klass = NULL; |
3930 if (tary->_elem->isa_int()) { | |
3931 // Integral array element types have irrelevant lattice relations. | |
3932 // It is the klass that determines array layout, not the element type. | |
3933 if (_klass == NULL) | |
3934 lazy_klass = tap->_klass; | |
3935 else if (tap->_klass == NULL || tap->_klass == _klass) { | |
3936 lazy_klass = _klass; | |
3937 } else { | |
3938 // Something like byte[int+] meets char[int+]. | |
3939 // This must fall to bottom, not (int[-128..65535])[int+]. | |
247 | 3940 instance_id = InstanceBot; |
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3941 tary = TypeAry::make(Type::BOTTOM, tary->_size, tary->_stable); |
0 | 3942 } |
2351 | 3943 } else // Non integral arrays. |
14228 | 3944 // Must fall to bottom if exact klasses in upper lattice |
3945 // are not equal or super klass is exact. | |
3946 if ((above_centerline(ptr) || ptr == Constant) && klass() != tap->klass() && | |
3947 // meet with top[] and bottom[] are processed further down: | |
3948 tap->_klass != NULL && this->_klass != NULL && | |
3949 // both are exact and not equal: | |
3950 ((tap->_klass_is_exact && this->_klass_is_exact) || | |
3951 // 'tap' is exact and super or unrelated: | |
3952 (tap->_klass_is_exact && !tap->klass()->is_subtype_of(klass())) || | |
3953 // 'this' is exact and super or unrelated: | |
3954 (this->_klass_is_exact && !klass()->is_subtype_of(tap->klass())))) { | |
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3955 tary = TypeAry::make(Type::BOTTOM, tary->_size, tary->_stable); |
12966 | 3956 return make(NotNull, NULL, tary, lazy_klass, false, off, InstanceBot); |
0 | 3957 } |
2351 | 3958 |
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|
3959 bool xk = false; |
0 | 3960 switch (tap->ptr()) { |
3961 case AnyNull: | |
3962 case TopPTR: | |
3963 // Compute new klass on demand, do not use tap->_klass | |
12966 | 3964 if (below_centerline(this->_ptr)) { |
3965 xk = this->_klass_is_exact; | |
3966 } else { | |
3967 xk = (tap->_klass_is_exact | this->_klass_is_exact); | |
3968 } | |
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|
3969 return make(ptr, const_oop(), tary, lazy_klass, xk, off, instance_id, speculative, depth); |
0 | 3970 case Constant: { |
3971 ciObject* o = const_oop(); | |
3972 if( _ptr == Constant ) { | |
3973 if( tap->const_oop() != NULL && !o->equals(tap->const_oop()) ) { | |
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|
3974 xk = (klass() == tap->klass()); |
0 | 3975 ptr = NotNull; |
3976 o = NULL; | |
247 | 3977 instance_id = InstanceBot; |
989
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|
3978 } else { |
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|
3979 xk = true; |
0 | 3980 } |
12966 | 3981 } else if(above_centerline(_ptr)) { |
0 | 3982 o = tap->const_oop(); |
989
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|
3983 xk = true; |
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|
3984 } else { |
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|
3985 // Only precise for identical arrays |
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|
3986 xk = this->_klass_is_exact && (klass() == tap->klass()); |
0 | 3987 } |
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|
3988 return TypeAryPtr::make(ptr, o, tary, lazy_klass, xk, off, instance_id, speculative, depth); |
0 | 3989 } |
3990 case NotNull: | |
3991 case BotPTR: | |
3992 // Compute new klass on demand, do not use tap->_klass | |
3993 if (above_centerline(this->_ptr)) | |
3994 xk = tap->_klass_is_exact; | |
3995 else xk = (tap->_klass_is_exact & this->_klass_is_exact) && | |
3996 (klass() == tap->klass()); // Only precise for identical arrays | |
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3997 return TypeAryPtr::make(ptr, NULL, tary, lazy_klass, xk, off, instance_id, speculative, depth); |
0 | 3998 default: ShouldNotReachHere(); |
3999 } | |
4000 } | |
4001 | |
4002 // All arrays inherit from Object class | |
4003 case InstPtr: { | |
4004 const TypeInstPtr *tp = t->is_instptr(); | |
4005 int offset = meet_offset(tp->offset()); | |
4006 PTR ptr = meet_ptr(tp->ptr()); | |
223 | 4007 int instance_id = meet_instance_id(tp->instance_id()); |
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|
4008 const TypeOopPtr* speculative = xmeet_speculative(tp); |
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|
4009 int depth = meet_inline_depth(tp->inline_depth()); |
0 | 4010 switch (ptr) { |
4011 case TopPTR: | |
4012 case AnyNull: // Fall 'down' to dual of object klass | |
12966 | 4013 // For instances when a subclass meets a superclass we fall |
4014 // below the centerline when the superclass is exact. We need to | |
4015 // do the same here. | |
4016 if (tp->klass()->equals(ciEnv::current()->Object_klass()) && !tp->klass_is_exact()) { | |
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4017 return TypeAryPtr::make(ptr, _ary, _klass, _klass_is_exact, offset, instance_id, speculative, depth); |
0 | 4018 } else { |
4019 // cannot subclass, so the meet has to fall badly below the centerline | |
4020 ptr = NotNull; | |
223 | 4021 instance_id = InstanceBot; |
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4022 return TypeInstPtr::make(ptr, ciEnv::current()->Object_klass(), false, NULL,offset, instance_id, speculative, depth); |
0 | 4023 } |
4024 case Constant: | |
4025 case NotNull: | |
4026 case BotPTR: // Fall down to object klass | |
4027 // LCA is object_klass, but if we subclass from the top we can do better | |
4028 if (above_centerline(tp->ptr())) { | |
4029 // If 'tp' is above the centerline and it is Object class | |
605 | 4030 // then we can subclass in the Java class hierarchy. |
12966 | 4031 // For instances when a subclass meets a superclass we fall |
4032 // below the centerline when the superclass is exact. We need | |
4033 // to do the same here. | |
4034 if (tp->klass()->equals(ciEnv::current()->Object_klass()) && !tp->klass_is_exact()) { | |
0 | 4035 // that is, my array type is a subtype of 'tp' klass |
12966 | 4036 return make(ptr, (ptr == Constant ? const_oop() : NULL), |
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|
4037 _ary, _klass, _klass_is_exact, offset, instance_id, speculative, depth); |
0 | 4038 } |
4039 } | |
4040 // The other case cannot happen, since t cannot be a subtype of an array. | |
4041 // The meet falls down to Object class below centerline. | |
4042 if( ptr == Constant ) | |
4043 ptr = NotNull; | |
223 | 4044 instance_id = InstanceBot; |
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|
4045 return TypeInstPtr::make(ptr, ciEnv::current()->Object_klass(), false, NULL,offset, instance_id, speculative, depth); |
0 | 4046 default: typerr(t); |
4047 } | |
4048 } | |
4049 } | |
4050 return this; // Lint noise | |
4051 } | |
4052 | |
4053 //------------------------------xdual------------------------------------------ | |
4054 // Dual: compute field-by-field dual | |
4055 const Type *TypeAryPtr::xdual() const { | |
17731
62825ea7e51f
8031754: Type speculation should favor profile data from outermost inlined method
roland
parents:
17726
diff
changeset
|
4056 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 | 4057 } |
4058 | |
820
915cc9c5ebc6
6837094: False positive for "meet not symmetric" failure
kvn
parents:
628
diff
changeset
|
4059 //----------------------interface_vs_oop--------------------------------------- |
915cc9c5ebc6
6837094: False positive for "meet not symmetric" failure
kvn
parents:
628
diff
changeset
|
4060 #ifdef ASSERT |
915cc9c5ebc6
6837094: False positive for "meet not symmetric" failure
kvn
parents:
628
diff
changeset
|
4061 bool TypeAryPtr::interface_vs_oop(const Type *t) const { |
915cc9c5ebc6
6837094: False positive for "meet not symmetric" failure
kvn
parents:
628
diff
changeset
|
4062 const TypeAryPtr* t_aryptr = t->isa_aryptr(); |
915cc9c5ebc6
6837094: False positive for "meet not symmetric" failure
kvn
parents:
628
diff
changeset
|
4063 if (t_aryptr) { |
915cc9c5ebc6
6837094: False positive for "meet not symmetric" failure
kvn
parents:
628
diff
changeset
|
4064 return _ary->interface_vs_oop(t_aryptr->_ary); |
915cc9c5ebc6
6837094: False positive for "meet not symmetric" failure
kvn
parents:
628
diff
changeset
|
4065 } |
915cc9c5ebc6
6837094: False positive for "meet not symmetric" failure
kvn
parents:
628
diff
changeset
|
4066 return false; |
915cc9c5ebc6
6837094: False positive for "meet not symmetric" failure
kvn
parents:
628
diff
changeset
|
4067 } |
915cc9c5ebc6
6837094: False positive for "meet not symmetric" failure
kvn
parents:
628
diff
changeset
|
4068 #endif |
915cc9c5ebc6
6837094: False positive for "meet not symmetric" failure
kvn
parents:
628
diff
changeset
|
4069 |
0 | 4070 //------------------------------dump2------------------------------------------ |
4071 #ifndef PRODUCT | |
4072 void TypeAryPtr::dump2( Dict &d, uint depth, outputStream *st ) const { | |
4073 _ary->dump2(d,depth,st); | |
4074 switch( _ptr ) { | |
4075 case Constant: | |
4076 const_oop()->print(st); | |
4077 break; | |
4078 case BotPTR: | |
4079 if (!WizardMode && !Verbose) { | |
4080 if( _klass_is_exact ) st->print(":exact"); | |
4081 break; | |
4082 } | |
4083 case TopPTR: | |
4084 case AnyNull: | |
4085 case NotNull: | |
4086 st->print(":%s", ptr_msg[_ptr]); | |
4087 if( _klass_is_exact ) st->print(":exact"); | |
4088 break; | |
4089 } | |
4090 | |
64
b8f5ba577b02
6673473: (Escape Analysis) Add the instance's field information to PhiNode
kvn
parents:
0
diff
changeset
|
4091 if( _offset != 0 ) { |
b8f5ba577b02
6673473: (Escape Analysis) Add the instance's field information to PhiNode
kvn
parents:
0
diff
changeset
|
4092 int header_size = objArrayOopDesc::header_size() * wordSize; |
b8f5ba577b02
6673473: (Escape Analysis) Add the instance's field information to PhiNode
kvn
parents:
0
diff
changeset
|
4093 if( _offset == OffsetTop ) st->print("+undefined"); |
b8f5ba577b02
6673473: (Escape Analysis) Add the instance's field information to PhiNode
kvn
parents:
0
diff
changeset
|
4094 else if( _offset == OffsetBot ) st->print("+any"); |
b8f5ba577b02
6673473: (Escape Analysis) Add the instance's field information to PhiNode
kvn
parents:
0
diff
changeset
|
4095 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
|
4096 else { |
b8f5ba577b02
6673473: (Escape Analysis) Add the instance's field information to PhiNode
kvn
parents:
0
diff
changeset
|
4097 BasicType basic_elem_type = elem()->basic_type(); |
b8f5ba577b02
6673473: (Escape Analysis) Add the instance's field information to PhiNode
kvn
parents:
0
diff
changeset
|
4098 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
|
4099 int elem_size = type2aelembytes(basic_elem_type); |
b8f5ba577b02
6673473: (Escape Analysis) Add the instance's field information to PhiNode
kvn
parents:
0
diff
changeset
|
4100 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
|
4101 } |
b8f5ba577b02
6673473: (Escape Analysis) Add the instance's field information to PhiNode
kvn
parents:
0
diff
changeset
|
4102 } |
b8f5ba577b02
6673473: (Escape Analysis) Add the instance's field information to PhiNode
kvn
parents:
0
diff
changeset
|
4103 st->print(" *"); |
223 | 4104 if (_instance_id == InstanceTop) |
4105 st->print(",iid=top"); | |
4106 else if (_instance_id != InstanceBot) | |
0 | 4107 st->print(",iid=%d",_instance_id); |
12966 | 4108 |
17731
62825ea7e51f
8031754: Type speculation should favor profile data from outermost inlined method
roland
parents:
17726
diff
changeset
|
4109 dump_inline_depth(st); |
12966 | 4110 dump_speculative(st); |
0 | 4111 } |
4112 #endif | |
4113 | |
4114 bool TypeAryPtr::empty(void) const { | |
4115 if (_ary->empty()) return true; | |
4116 return TypeOopPtr::empty(); | |
4117 } | |
4118 | |
4119 //------------------------------add_offset------------------------------------- | |
12966 | 4120 const TypePtr *TypeAryPtr::add_offset(intptr_t offset) const { |
17731
62825ea7e51f
8031754: Type speculation should favor profile data from outermost inlined method
roland
parents:
17726
diff
changeset
|
4121 return make(_ptr, _const_oop, _ary, _klass, _klass_is_exact, xadd_offset(offset), _instance_id, add_offset_speculative(offset), _inline_depth); |
12966 | 4122 } |
4123 | |
14383
5ec7dace41a6
8027422: assert(_gvn.type(obj)->higher_equal(tjp)) failed: cast_up is no longer needed
roland
parents:
14228
diff
changeset
|
4124 const Type *TypeAryPtr::remove_speculative() const { |
17731
62825ea7e51f
8031754: Type speculation should favor profile data from outermost inlined method
roland
parents:
17726
diff
changeset
|
4125 if (_speculative == NULL) { |
62825ea7e51f
8031754: Type speculation should favor profile data from outermost inlined method
roland
parents:
17726
diff
changeset
|
4126 return this; |
62825ea7e51f
8031754: Type speculation should favor profile data from outermost inlined method
roland
parents:
17726
diff
changeset
|
4127 } |
62825ea7e51f
8031754: Type speculation should favor profile data from outermost inlined method
roland
parents:
17726
diff
changeset
|
4128 assert(_inline_depth == InlineDepthTop || _inline_depth == InlineDepthBottom, "non speculative type shouldn't have inline depth"); |
62825ea7e51f
8031754: Type speculation should favor profile data from outermost inlined method
roland
parents:
17726
diff
changeset
|
4129 return make(_ptr, _const_oop, _ary->remove_speculative()->is_ary(), _klass, _klass_is_exact, _offset, _instance_id, NULL, _inline_depth); |
62825ea7e51f
8031754: Type speculation should favor profile data from outermost inlined method
roland
parents:
17726
diff
changeset
|
4130 } |
62825ea7e51f
8031754: Type speculation should favor profile data from outermost inlined method
roland
parents:
17726
diff
changeset
|
4131 |
62825ea7e51f
8031754: Type speculation should favor profile data from outermost inlined method
roland
parents:
17726
diff
changeset
|
4132 const TypeOopPtr *TypeAryPtr::with_inline_depth(int depth) const { |
62825ea7e51f
8031754: Type speculation should favor profile data from outermost inlined method
roland
parents:
17726
diff
changeset
|
4133 if (!UseInlineDepthForSpeculativeTypes) { |
62825ea7e51f
8031754: Type speculation should favor profile data from outermost inlined method
roland
parents:
17726
diff
changeset
|
4134 return this; |
62825ea7e51f
8031754: Type speculation should favor profile data from outermost inlined method
roland
parents:
17726
diff
changeset
|
4135 } |
62825ea7e51f
8031754: Type speculation should favor profile data from outermost inlined method
roland
parents:
17726
diff
changeset
|
4136 return make(_ptr, _const_oop, _ary->remove_speculative()->is_ary(), _klass, _klass_is_exact, _offset, _instance_id, _speculative, depth); |
12966 | 4137 } |
0 | 4138 |
4139 //============================================================================= | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4140 |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4141 //------------------------------hash------------------------------------------- |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4142 // Type-specific hashing function. |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4143 int TypeNarrowPtr::hash(void) const { |
827
bf3489cc0aa0
6856025: assert(_base >= OopPtr && _base <= KlassPtr,"Not a Java pointer")
never
parents:
820
diff
changeset
|
4144 return _ptrtype->hash() + 7; |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4145 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4146 |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4147 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
|
4148 return _ptrtype->singleton(); |
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 bool TypeNarrowPtr::empty(void) const { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4152 return _ptrtype->empty(); |
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 intptr_t TypeNarrowPtr::get_con() const { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4156 return _ptrtype->get_con(); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4157 } |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4158 |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4159 bool TypeNarrowPtr::eq( const Type *t ) const { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4160 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
|
4161 if (tc != NULL) { |
827
bf3489cc0aa0
6856025: assert(_base >= OopPtr && _base <= KlassPtr,"Not a Java pointer")
never
parents:
820
diff
changeset
|
4162 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
|
4163 return false; |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4164 } |
827
bf3489cc0aa0
6856025: assert(_base >= OopPtr && _base <= KlassPtr,"Not a Java pointer")
never
parents:
820
diff
changeset
|
4165 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
|
4166 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4167 return false; |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4168 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4169 |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4170 const Type *TypeNarrowPtr::xdual() const { // Compute dual right now. |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4171 const TypePtr* odual = _ptrtype->dual()->is_ptr(); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4172 return make_same_narrowptr(odual); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4173 } |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4174 |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4175 |
14383
5ec7dace41a6
8027422: assert(_gvn.type(obj)->higher_equal(tjp)) failed: cast_up is no longer needed
roland
parents:
14228
diff
changeset
|
4176 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
|
4177 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
|
4178 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
|
4179 if (ft->empty()) |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4180 return Type::TOP; // Canonical empty value |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4181 if (ft->isa_ptr()) { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4182 return make_hash_same_narrowptr(ft->isa_ptr()); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4183 } |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4184 return ft; |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4185 } 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
|
4186 const Type* ft = _ptrtype->join_helper(kills, include_speculative); |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4187 if (ft->empty()) |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4188 return Type::TOP; // Canonical empty value |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4189 return ft; |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4190 } else { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4191 return Type::TOP; |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4192 } |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4193 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4194 |
293
c3e045194476
6731641: assert(m->adr_type() == mach->adr_type(),"matcher should not change adr type")
kvn
parents:
247
diff
changeset
|
4195 //------------------------------xmeet------------------------------------------ |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4196 // 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
|
4197 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
|
4198 // 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
|
4199 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
|
4200 |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4201 if (t->base() == base()) { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4202 const Type* result = _ptrtype->xmeet(t->make_ptr()); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4203 if (result->isa_ptr()) { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4204 return make_hash_same_narrowptr(result->is_ptr()); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4205 } |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4206 return result; |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4207 } |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4208 |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4209 // 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
|
4210 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
|
4211 |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4212 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
|
4213 case Long: // reuses local variables |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4214 case FloatTop: |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4215 case FloatCon: |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4216 case FloatBot: |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4217 case DoubleTop: |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4218 case DoubleCon: |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4219 case DoubleBot: |
293
c3e045194476
6731641: assert(m->adr_type() == mach->adr_type(),"matcher should not change adr type")
kvn
parents:
247
diff
changeset
|
4220 case AnyPtr: |
c3e045194476
6731641: assert(m->adr_type() == mach->adr_type(),"matcher should not change adr type")
kvn
parents:
247
diff
changeset
|
4221 case RawPtr: |
c3e045194476
6731641: assert(m->adr_type() == mach->adr_type(),"matcher should not change adr type")
kvn
parents:
247
diff
changeset
|
4222 case OopPtr: |
c3e045194476
6731641: assert(m->adr_type() == mach->adr_type(),"matcher should not change adr type")
kvn
parents:
247
diff
changeset
|
4223 case InstPtr: |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4224 case AryPtr: |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4225 case MetadataPtr: |
293
c3e045194476
6731641: assert(m->adr_type() == mach->adr_type(),"matcher should not change adr type")
kvn
parents:
247
diff
changeset
|
4226 case KlassPtr: |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4227 case NarrowOop: |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4228 case NarrowKlass: |
293
c3e045194476
6731641: assert(m->adr_type() == mach->adr_type(),"matcher should not change adr type")
kvn
parents:
247
diff
changeset
|
4229 |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4230 case Bottom: // Ye Olde Default |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4231 return Type::BOTTOM; |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4232 case Top: |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4233 return this; |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4234 |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4235 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
|
4236 typerr(t); |
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 } // End of switch |
293
c3e045194476
6731641: assert(m->adr_type() == mach->adr_type(),"matcher should not change adr type")
kvn
parents:
247
diff
changeset
|
4239 |
c3e045194476
6731641: assert(m->adr_type() == mach->adr_type(),"matcher should not change adr type")
kvn
parents:
247
diff
changeset
|
4240 return this; |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4241 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4242 |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4243 #ifndef PRODUCT |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4244 void TypeNarrowPtr::dump2( Dict & d, uint depth, outputStream *st ) const { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4245 _ptrtype->dump2(d, depth, st); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4246 } |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4247 #endif |
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::BOTTOM; |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4250 const TypeNarrowOop *TypeNarrowOop::NULL_PTR; |
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 |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4253 const TypeNarrowOop* TypeNarrowOop::make(const TypePtr* type) { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4254 return (const TypeNarrowOop*)(new TypeNarrowOop(type))->hashcons(); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4255 } |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4256 |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4257 |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4258 #ifndef PRODUCT |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4259 void TypeNarrowOop::dump2( Dict & d, uint depth, outputStream *st ) const { |
417 | 4260 st->print("narrowoop: "); |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4261 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
|
4262 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4263 #endif |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4264 |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4265 const TypeNarrowKlass *TypeNarrowKlass::NULL_PTR; |
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 const TypeNarrowKlass* TypeNarrowKlass::make(const TypePtr* type) { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4268 return (const TypeNarrowKlass*)(new TypeNarrowKlass(type))->hashcons(); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4269 } |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4270 |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4271 #ifndef PRODUCT |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4272 void TypeNarrowKlass::dump2( Dict & d, uint depth, outputStream *st ) const { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4273 st->print("narrowklass: "); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4274 TypeNarrowPtr::dump2(d, depth, st); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4275 } |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
4276 #endif |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
4277 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4278 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4279 //------------------------------eq--------------------------------------------- |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4280 // Structural equality check for Type representations |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4281 bool TypeMetadataPtr::eq( const Type *t ) const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4282 const TypeMetadataPtr *a = (const TypeMetadataPtr*)t; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4283 ciMetadata* one = metadata(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4284 ciMetadata* two = a->metadata(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4285 if (one == NULL || two == NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4286 return (one == two) && TypePtr::eq(t); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4287 } else { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4288 return one->equals(two) && TypePtr::eq(t); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4289 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4290 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4291 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4292 //------------------------------hash------------------------------------------- |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4293 // Type-specific hashing function. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4294 int TypeMetadataPtr::hash(void) const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4295 return |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4296 (metadata() ? metadata()->hash() : 0) + |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4297 TypePtr::hash(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4298 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4299 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4300 //------------------------------singleton-------------------------------------- |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4301 // 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
|
4302 // constants |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4303 bool TypeMetadataPtr::singleton(void) const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4304 // 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
|
4305 // TopPTR, Null, AnyNull, Constant are all singletons |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4306 return (_offset == 0) && !below_centerline(_ptr); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4307 } |
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 //------------------------------add_offset------------------------------------- |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4310 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
|
4311 return make( _ptr, _metadata, xadd_offset(offset)); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4312 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4313 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4314 //-----------------------------filter------------------------------------------ |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4315 // 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
|
4316 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
|
4317 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
|
4318 if (ft == NULL || ft->empty()) |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4319 return Type::TOP; // Canonical empty value |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4320 return ft; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4321 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4322 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4323 //------------------------------get_con---------------------------------------- |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4324 intptr_t TypeMetadataPtr::get_con() const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4325 assert( _ptr == Null || _ptr == Constant, "" ); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4326 assert( _offset >= 0, "" ); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4327 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4328 if (_offset != 0) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4329 // 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
|
4330 // 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
|
4331 // 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
|
4332 // 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
|
4333 // 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
|
4334 // 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
|
4335 // 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
|
4336 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
|
4337 ShouldNotReachHere(); |
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 |
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4340 return (intptr_t)metadata()->constant_encoding(); |
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4341 } |
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4342 |
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4343 //------------------------------cast_to_ptr_type------------------------------- |
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4344 const Type *TypeMetadataPtr::cast_to_ptr_type(PTR ptr) const { |
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4345 if( ptr == _ptr ) return this; |
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4346 return make(ptr, metadata(), _offset); |
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4347 } |
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4348 |
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4349 //------------------------------meet------------------------------------------- |
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4350 // Compute the MEET of two types. It returns a new Type object. |
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4351 const Type *TypeMetadataPtr::xmeet( const Type *t ) const { |
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4352 // Perform a fast test for common case; meeting the same types together. |
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4353 if( this == t ) return this; // Meeting same type-rep? |
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4354 |
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4355 // Current "this->_base" is OopPtr |
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4356 switch (t->base()) { // switch on original type |
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4357 |
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4358 case Int: // Mixing ints & oops happens when javac |
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4359 case Long: // reuses local variables |
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4360 case FloatTop: |
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4361 case FloatCon: |
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4362 case FloatBot: |
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4363 case DoubleTop: |
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4364 case DoubleCon: |
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4365 case DoubleBot: |
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4366 case NarrowOop: |
6848
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4367 case NarrowKlass: |
6725
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4368 case Bottom: // Ye Olde Default |
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4369 return Type::BOTTOM; |
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4370 case Top: |
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4371 return this; |
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|
4372 |
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4373 default: // All else is a mistake |
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4374 typerr(t); |
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|
4375 |
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4376 case AnyPtr: { |
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4377 // Found an AnyPtr type vs self-OopPtr type |
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4378 const TypePtr *tp = t->is_ptr(); |
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4379 int offset = meet_offset(tp->offset()); |
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4380 PTR ptr = meet_ptr(tp->ptr()); |
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4381 switch (tp->ptr()) { |
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4382 case Null: |
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4383 if (ptr == Null) return TypePtr::make(AnyPtr, ptr, offset); |
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4384 // else fall through: |
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4385 case TopPTR: |
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4386 case AnyNull: { |
17780 | 4387 return make(ptr, _metadata, offset); |
6725
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4388 } |
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4389 case BotPTR: |
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4390 case NotNull: |
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4391 return TypePtr::make(AnyPtr, ptr, offset); |
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4392 default: typerr(t); |
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|
4393 } |
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|
4394 } |
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|
4395 |
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4396 case RawPtr: |
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4397 case KlassPtr: |
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4398 case OopPtr: |
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4399 case InstPtr: |
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4400 case AryPtr: |
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4401 return TypePtr::BOTTOM; // Oop meet raw is not well defined |
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4402 |
6728 | 4403 case MetadataPtr: { |
4404 const TypeMetadataPtr *tp = t->is_metadataptr(); | |
4405 int offset = meet_offset(tp->offset()); | |
4406 PTR tptr = tp->ptr(); | |
4407 PTR ptr = meet_ptr(tptr); | |
4408 ciMetadata* md = (tptr == TopPTR) ? metadata() : tp->metadata(); | |
4409 if (tptr == TopPTR || _ptr == TopPTR || | |
4410 metadata()->equals(tp->metadata())) { | |
4411 return make(ptr, md, offset); | |
4412 } | |
4413 // metadata is different | |
4414 if( ptr == Constant ) { // Cannot be equal constants, so... | |
4415 if( tptr == Constant && _ptr != Constant) return t; | |
4416 if( _ptr == Constant && tptr != Constant) return this; | |
4417 ptr = NotNull; // Fall down in lattice | |
4418 } | |
4419 return make(ptr, NULL, offset); | |
6725
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4420 break; |
6728 | 4421 } |
6725
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4422 } // End of switch |
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4423 return this; // Return the double constant |
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|
4424 } |
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|
4425 |
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|
4426 |
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|
4427 //------------------------------xdual------------------------------------------ |
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4428 // Dual of a pure metadata pointer. |
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|
4429 const Type *TypeMetadataPtr::xdual() const { |
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4430 return new TypeMetadataPtr(dual_ptr(), metadata(), dual_offset()); |
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|
4431 } |
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|
4432 |
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|
4433 //------------------------------dump2------------------------------------------ |
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|
4434 #ifndef PRODUCT |
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|
4435 void TypeMetadataPtr::dump2( Dict &d, uint depth, outputStream *st ) const { |
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4436 st->print("metadataptr:%s", ptr_msg[_ptr]); |
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4437 if( metadata() ) st->print(INTPTR_FORMAT, metadata()); |
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|
4438 switch( _offset ) { |
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|
4439 case OffsetTop: st->print("+top"); break; |
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4440 case OffsetBot: st->print("+any"); break; |
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4441 case 0: break; |
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|
4442 default: st->print("+%d",_offset); break; |
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|
4443 } |
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|
4444 } |
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|
4445 #endif |
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|
4446 |
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4447 |
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|
4448 //============================================================================= |
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4449 // Convenience common pre-built type. |
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4450 const TypeMetadataPtr *TypeMetadataPtr::BOTTOM; |
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|
4451 |
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4452 TypeMetadataPtr::TypeMetadataPtr(PTR ptr, ciMetadata* metadata, int offset): |
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4453 TypePtr(MetadataPtr, ptr, offset), _metadata(metadata) { |
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|
4454 } |
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4455 |
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4456 const TypeMetadataPtr* TypeMetadataPtr::make(ciMethod* m) { |
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4457 return make(Constant, m, 0); |
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|
4458 } |
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4459 const TypeMetadataPtr* TypeMetadataPtr::make(ciMethodData* m) { |
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4460 return make(Constant, m, 0); |
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|
4461 } |
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|
4462 |
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|
4463 //------------------------------make------------------------------------------- |
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|
4464 // Create a meta data constant |
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4465 const TypeMetadataPtr *TypeMetadataPtr::make(PTR ptr, ciMetadata* m, int offset) { |
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4466 assert(m == NULL || !m->is_klass(), "wrong type"); |
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4467 return (TypeMetadataPtr*)(new TypeMetadataPtr(ptr, m, offset))->hashcons(); |
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|
4468 } |
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|
4469 |
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|
4470 |
113
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diff
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|
4471 //============================================================================= |
0 | 4472 // Convenience common pre-built types. |
4473 | |
4474 // Not-null object klass or below | |
4475 const TypeKlassPtr *TypeKlassPtr::OBJECT; | |
4476 const TypeKlassPtr *TypeKlassPtr::OBJECT_OR_NULL; | |
4477 | |
6725
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4478 //------------------------------TypeKlassPtr----------------------------------- |
0 | 4479 TypeKlassPtr::TypeKlassPtr( PTR ptr, ciKlass* klass, int offset ) |
6725
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4480 : TypePtr(KlassPtr, ptr, offset), _klass(klass), _klass_is_exact(ptr == Constant) { |
0 | 4481 } |
4482 | |
4483 //------------------------------make------------------------------------------- | |
4484 // ptr to klass 'k', if Constant, or possibly to a sub-klass if not a Constant | |
4485 const TypeKlassPtr *TypeKlassPtr::make( PTR ptr, ciKlass* k, int offset ) { | |
4486 assert( k != NULL, "Expect a non-NULL klass"); | |
6725
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4487 assert(k->is_instance_klass() || k->is_array_klass(), "Incorrect type of klass oop"); |
0 | 4488 TypeKlassPtr *r = |
4489 (TypeKlassPtr*)(new TypeKlassPtr(ptr, k, offset))->hashcons(); | |
4490 | |
4491 return r; | |
4492 } | |
4493 | |
4494 //------------------------------eq--------------------------------------------- | |
4495 // Structural equality check for Type representations | |
4496 bool TypeKlassPtr::eq( const Type *t ) const { | |
4497 const TypeKlassPtr *p = t->is_klassptr(); | |
4498 return | |
4499 klass()->equals(p->klass()) && | |
6725
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4500 TypePtr::eq(p); |
0 | 4501 } |
4502 | |
4503 //------------------------------hash------------------------------------------- | |
4504 // Type-specific hashing function. | |
4505 int TypeKlassPtr::hash(void) const { | |
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4506 return klass()->hash() + TypePtr::hash(); |
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4507 } |
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4508 |
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4509 //------------------------------singleton-------------------------------------- |
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4510 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple |
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4511 // constants |
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4512 bool TypeKlassPtr::singleton(void) const { |
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4513 // detune optimizer to not generate constant klass + constant offset as a constant! |
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4514 // TopPTR, Null, AnyNull, Constant are all singletons |
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4515 return (_offset == 0) && !below_centerline(_ptr); |
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4516 } |
0 | 4517 |
13014
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4518 // Do not allow interface-vs.-noninterface joins to collapse to top. |
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4519 const Type *TypeKlassPtr::filter_helper(const Type *kills, bool include_speculative) const { |
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4520 // logic here mirrors the one from TypeOopPtr::filter. See comments |
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4521 // there. |
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4522 const Type* ft = join_helper(kills, include_speculative); |
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4523 const TypeKlassPtr* ftkp = ft->isa_klassptr(); |
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4524 const TypeKlassPtr* ktkp = kills->isa_klassptr(); |
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4525 |
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4526 if (ft->empty()) { |
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4527 if (!empty() && ktkp != NULL && ktkp->klass()->is_loaded() && ktkp->klass()->is_interface()) |
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4528 return kills; // Uplift to interface |
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4529 |
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4530 return Type::TOP; // Canonical empty value |
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4531 } |
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4532 |
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4533 // Interface klass type could be exact in opposite to interface type, |
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4534 // return it here instead of incorrect Constant ptr J/L/Object (6894807). |
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4535 if (ftkp != NULL && ktkp != NULL && |
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4536 ftkp->is_loaded() && ftkp->klass()->is_interface() && |
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4537 !ftkp->klass_is_exact() && // Keep exact interface klass |
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4538 ktkp->is_loaded() && !ktkp->klass()->is_interface()) { |
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4539 return ktkp->cast_to_ptr_type(ftkp->ptr()); |
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4540 } |
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4541 |
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4542 return ft; |
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4543 } |
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4544 |
1761 | 4545 //----------------------compute_klass------------------------------------------ |
4546 // Compute the defining klass for this class | |
4547 ciKlass* TypeAryPtr::compute_klass(DEBUG_ONLY(bool verify)) const { | |
4548 // Compute _klass based on element type. | |
0 | 4549 ciKlass* k_ary = NULL; |
4550 const TypeInstPtr *tinst; | |
4551 const TypeAryPtr *tary; | |
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4552 const Type* el = elem(); |
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4553 if (el->isa_narrowoop()) { |
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4554 el = el->make_ptr(); |
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4555 } |
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4556 |
0 | 4557 // Get element klass |
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4558 if ((tinst = el->isa_instptr()) != NULL) { |
0 | 4559 // Compute array klass from element klass |
4560 k_ary = ciObjArrayKlass::make(tinst->klass()); | |
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4561 } else if ((tary = el->isa_aryptr()) != NULL) { |
0 | 4562 // Compute array klass from element klass |
4563 ciKlass* k_elem = tary->klass(); | |
4564 // If element type is something like bottom[], k_elem will be null. | |
4565 if (k_elem != NULL) | |
4566 k_ary = ciObjArrayKlass::make(k_elem); | |
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4567 } else if ((el->base() == Type::Top) || |
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4568 (el->base() == Type::Bottom)) { |
0 | 4569 // element type of Bottom occurs from meet of basic type |
4570 // and object; Top occurs when doing join on Bottom. | |
4571 // Leave k_ary at NULL. | |
4572 } else { | |
4573 // Cannot compute array klass directly from basic type, | |
4574 // since subtypes of TypeInt all have basic type T_INT. | |
1761 | 4575 #ifdef ASSERT |
4576 if (verify && el->isa_int()) { | |
4577 // Check simple cases when verifying klass. | |
4578 BasicType bt = T_ILLEGAL; | |
4579 if (el == TypeInt::BYTE) { | |
4580 bt = T_BYTE; | |
4581 } else if (el == TypeInt::SHORT) { | |
4582 bt = T_SHORT; | |
4583 } else if (el == TypeInt::CHAR) { | |
4584 bt = T_CHAR; | |
4585 } else if (el == TypeInt::INT) { | |
4586 bt = T_INT; | |
4587 } else { | |
4588 return _klass; // just return specified klass | |
4589 } | |
4590 return ciTypeArrayKlass::make(bt); | |
4591 } | |
4592 #endif | |
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4593 assert(!el->isa_int(), |
0 | 4594 "integral arrays must be pre-equipped with a class"); |
4595 // Compute array klass directly from basic type | |
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4596 k_ary = ciTypeArrayKlass::make(el->basic_type()); |
0 | 4597 } |
1761 | 4598 return k_ary; |
4599 } | |
4600 | |
4601 //------------------------------klass------------------------------------------ | |
4602 // Return the defining klass for this class | |
4603 ciKlass* TypeAryPtr::klass() const { | |
4604 if( _klass ) return _klass; // Return cached value, if possible | |
4605 | |
4606 // Oops, need to compute _klass and cache it | |
4607 ciKlass* k_ary = compute_klass(); | |
0 | 4608 |
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4609 if( this != TypeAryPtr::OOPS && this->dual() != TypeAryPtr::OOPS ) { |
0 | 4610 // The _klass field acts as a cache of the underlying |
4611 // ciKlass for this array type. In order to set the field, | |
4612 // we need to cast away const-ness. | |
4613 // | |
4614 // IMPORTANT NOTE: we *never* set the _klass field for the | |
4615 // type TypeAryPtr::OOPS. This Type is shared between all | |
4616 // active compilations. However, the ciKlass which represents | |
4617 // this Type is *not* shared between compilations, so caching | |
4618 // this value would result in fetching a dangling pointer. | |
4619 // | |
4620 // Recomputing the underlying ciKlass for each request is | |
4621 // a bit less efficient than caching, but calls to | |
4622 // TypeAryPtr::OOPS->klass() are not common enough to matter. | |
4623 ((TypeAryPtr*)this)->_klass = k_ary; | |
163 | 4624 if (UseCompressedOops && k_ary != NULL && k_ary->is_obj_array_klass() && |
4625 _offset != 0 && _offset != arrayOopDesc::length_offset_in_bytes()) { | |
4626 ((TypeAryPtr*)this)->_is_ptr_to_narrowoop = true; | |
4627 } | |
4628 } | |
0 | 4629 return k_ary; |
4630 } | |
4631 | |
4632 | |
4633 //------------------------------add_offset------------------------------------- | |
4634 // Access internals of klass object | |
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4635 const TypePtr *TypeKlassPtr::add_offset( intptr_t offset ) const { |
0 | 4636 return make( _ptr, klass(), xadd_offset(offset) ); |
4637 } | |
4638 | |
4639 //------------------------------cast_to_ptr_type------------------------------- | |
4640 const Type *TypeKlassPtr::cast_to_ptr_type(PTR ptr) const { | |
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|
4641 assert(_base == KlassPtr, "subclass must override cast_to_ptr_type"); |
0 | 4642 if( ptr == _ptr ) return this; |
4643 return make(ptr, _klass, _offset); | |
4644 } | |
4645 | |
4646 | |
4647 //-----------------------------cast_to_exactness------------------------------- | |
4648 const Type *TypeKlassPtr::cast_to_exactness(bool klass_is_exact) const { | |
4649 if( klass_is_exact == _klass_is_exact ) return this; | |
4650 if (!UseExactTypes) return this; | |
4651 return make(klass_is_exact ? Constant : NotNull, _klass, _offset); | |
4652 } | |
4653 | |
4654 | |
4655 //-----------------------------as_instance_type-------------------------------- | |
4656 // Corresponding type for an instance of the given class. | |
4657 // It will be NotNull, and exact if and only if the klass type is exact. | |
4658 const TypeOopPtr* TypeKlassPtr::as_instance_type() const { | |
4659 ciKlass* k = klass(); | |
4660 bool xk = klass_is_exact(); | |
4661 //return TypeInstPtr::make(TypePtr::NotNull, k, xk, NULL, 0); | |
4662 const TypeOopPtr* toop = TypeOopPtr::make_from_klass_raw(k); | |
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4663 guarantee(toop != NULL, "need type for given klass"); |
0 | 4664 toop = toop->cast_to_ptr_type(TypePtr::NotNull)->is_oopptr(); |
4665 return toop->cast_to_exactness(xk)->is_oopptr(); | |
4666 } | |
4667 | |
4668 | |
4669 //------------------------------xmeet------------------------------------------ | |
4670 // Compute the MEET of two types, return a new Type object. | |
4671 const Type *TypeKlassPtr::xmeet( const Type *t ) const { | |
4672 // Perform a fast test for common case; meeting the same types together. | |
4673 if( this == t ) return this; // Meeting same type-rep? | |
4674 | |
4675 // Current "this->_base" is Pointer | |
4676 switch (t->base()) { // switch on original type | |
4677 | |
4678 case Int: // Mixing ints & oops happens when javac | |
4679 case Long: // reuses local variables | |
4680 case FloatTop: | |
4681 case FloatCon: | |
4682 case FloatBot: | |
4683 case DoubleTop: | |
4684 case DoubleCon: | |
4685 case DoubleBot: | |
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4686 case NarrowOop: |
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4687 case NarrowKlass: |
0 | 4688 case Bottom: // Ye Olde Default |
4689 return Type::BOTTOM; | |
4690 case Top: | |
4691 return this; | |
4692 | |
4693 default: // All else is a mistake | |
4694 typerr(t); | |
4695 | |
4696 case AnyPtr: { // Meeting to AnyPtrs | |
4697 // Found an AnyPtr type vs self-KlassPtr type | |
4698 const TypePtr *tp = t->is_ptr(); | |
4699 int offset = meet_offset(tp->offset()); | |
4700 PTR ptr = meet_ptr(tp->ptr()); | |
4701 switch (tp->ptr()) { | |
4702 case TopPTR: | |
4703 return this; | |
4704 case Null: | |
4705 if( ptr == Null ) return TypePtr::make( AnyPtr, ptr, offset ); | |
4706 case AnyNull: | |
4707 return make( ptr, klass(), offset ); | |
4708 case BotPTR: | |
4709 case NotNull: | |
4710 return TypePtr::make(AnyPtr, ptr, offset); | |
4711 default: typerr(t); | |
4712 } | |
4713 } | |
4714 | |
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4715 case RawPtr: |
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4716 case MetadataPtr: |
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4717 case OopPtr: |
0 | 4718 case AryPtr: // Meet with AryPtr |
4719 case InstPtr: // Meet with InstPtr | |
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4720 return TypePtr::BOTTOM; |
0 | 4721 |
4722 // | |
4723 // A-top } | |
4724 // / | \ } Tops | |
4725 // B-top A-any C-top } | |
4726 // | / | \ | } Any-nulls | |
4727 // B-any | C-any } | |
4728 // | | | | |
4729 // B-con A-con C-con } constants; not comparable across classes | |
4730 // | | | | |
4731 // B-not | C-not } | |
4732 // | \ | / | } not-nulls | |
4733 // B-bot A-not C-bot } | |
4734 // \ | / } Bottoms | |
4735 // A-bot } | |
4736 // | |
4737 | |
4738 case KlassPtr: { // Meet two KlassPtr types | |
4739 const TypeKlassPtr *tkls = t->is_klassptr(); | |
4740 int off = meet_offset(tkls->offset()); | |
4741 PTR ptr = meet_ptr(tkls->ptr()); | |
4742 | |
4743 // Check for easy case; klasses are equal (and perhaps not loaded!) | |
4744 // If we have constants, then we created oops so classes are loaded | |
4745 // and we can handle the constants further down. This case handles | |
4746 // not-loaded classes | |
4747 if( ptr != Constant && tkls->klass()->equals(klass()) ) { | |
4748 return make( ptr, klass(), off ); | |
4749 } | |
4750 | |
4751 // Classes require inspection in the Java klass hierarchy. Must be loaded. | |
4752 ciKlass* tkls_klass = tkls->klass(); | |
4753 ciKlass* this_klass = this->klass(); | |
4754 assert( tkls_klass->is_loaded(), "This class should have been loaded."); | |
4755 assert( this_klass->is_loaded(), "This class should have been loaded."); | |
4756 | |
4757 // If 'this' type is above the centerline and is a superclass of the | |
4758 // other, we can treat 'this' as having the same type as the other. | |
4759 if ((above_centerline(this->ptr())) && | |
4760 tkls_klass->is_subtype_of(this_klass)) { | |
4761 this_klass = tkls_klass; | |
4762 } | |
4763 // If 'tinst' type is above the centerline and is a superclass of the | |
4764 // other, we can treat 'tinst' as having the same type as the other. | |
4765 if ((above_centerline(tkls->ptr())) && | |
4766 this_klass->is_subtype_of(tkls_klass)) { | |
4767 tkls_klass = this_klass; | |
4768 } | |
4769 | |
4770 // Check for classes now being equal | |
4771 if (tkls_klass->equals(this_klass)) { | |
4772 // If the klasses are equal, the constants may still differ. Fall to | |
4773 // NotNull if they do (neither constant is NULL; that is a special case | |
4774 // handled elsewhere). | |
4775 if( ptr == Constant ) { | |
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4776 if (this->_ptr == Constant && tkls->_ptr == Constant && |
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4777 this->klass()->equals(tkls->klass())); |
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4778 else if (above_centerline(this->ptr())); |
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4779 else if (above_centerline(tkls->ptr())); |
0 | 4780 else |
4781 ptr = NotNull; | |
4782 } | |
4783 return make( ptr, this_klass, off ); | |
4784 } // Else classes are not equal | |
4785 | |
4786 // Since klasses are different, we require the LCA in the Java | |
4787 // class hierarchy - which means we have to fall to at least NotNull. | |
4788 if( ptr == TopPTR || ptr == AnyNull || ptr == Constant ) | |
4789 ptr = NotNull; | |
4790 // Now we find the LCA of Java classes | |
4791 ciKlass* k = this_klass->least_common_ancestor(tkls_klass); | |
4792 return make( ptr, k, off ); | |
4793 } // End of case KlassPtr | |
4794 | |
4795 } // End of switch | |
4796 return this; // Return the double constant | |
4797 } | |
4798 | |
4799 //------------------------------xdual------------------------------------------ | |
4800 // Dual: compute field-by-field dual | |
4801 const Type *TypeKlassPtr::xdual() const { | |
4802 return new TypeKlassPtr( dual_ptr(), klass(), dual_offset() ); | |
4803 } | |
4804 | |
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4805 //------------------------------get_con---------------------------------------- |
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4806 intptr_t TypeKlassPtr::get_con() const { |
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4807 assert( _ptr == Null || _ptr == Constant, "" ); |
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4808 assert( _offset >= 0, "" ); |
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4809 |
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4810 if (_offset != 0) { |
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4811 // After being ported to the compiler interface, the compiler no longer |
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4812 // directly manipulates the addresses of oops. Rather, it only has a pointer |
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4813 // to a handle at compile time. This handle is embedded in the generated |
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4814 // code and dereferenced at the time the nmethod is made. Until that time, |
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4815 // it is not reasonable to do arithmetic with the addresses of oops (we don't |
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4816 // have access to the addresses!). This does not seem to currently happen, |
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4817 // but this assertion here is to help prevent its occurence. |
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4818 tty->print_cr("Found oop constant with non-zero offset"); |
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4819 ShouldNotReachHere(); |
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4820 } |
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4821 |
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4822 return (intptr_t)klass()->constant_encoding(); |
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4823 } |
0 | 4824 //------------------------------dump2------------------------------------------ |
4825 // Dump Klass Type | |
4826 #ifndef PRODUCT | |
4827 void TypeKlassPtr::dump2( Dict & d, uint depth, outputStream *st ) const { | |
4828 switch( _ptr ) { | |
4829 case Constant: | |
4830 st->print("precise "); | |
4831 case NotNull: | |
4832 { | |
4833 const char *name = klass()->name()->as_utf8(); | |
4834 if( name ) { | |
4835 st->print("klass %s: " INTPTR_FORMAT, name, klass()); | |
4836 } else { | |
4837 ShouldNotReachHere(); | |
4838 } | |
4839 } | |
4840 case BotPTR: | |
4841 if( !WizardMode && !Verbose && !_klass_is_exact ) break; | |
4842 case TopPTR: | |
4843 case AnyNull: | |
4844 st->print(":%s", ptr_msg[_ptr]); | |
4845 if( _klass_is_exact ) st->print(":exact"); | |
4846 break; | |
4847 } | |
4848 | |
4849 if( _offset ) { // Dump offset, if any | |
4850 if( _offset == OffsetBot ) { st->print("+any"); } | |
4851 else if( _offset == OffsetTop ) { st->print("+unknown"); } | |
4852 else { st->print("+%d", _offset); } | |
4853 } | |
4854 | |
4855 st->print(" *"); | |
4856 } | |
4857 #endif | |
4858 | |
4859 | |
4860 | |
4861 //============================================================================= | |
4862 // Convenience common pre-built types. | |
4863 | |
4864 //------------------------------make------------------------------------------- | |
4865 const TypeFunc *TypeFunc::make( const TypeTuple *domain, const TypeTuple *range ) { | |
4866 return (TypeFunc*)(new TypeFunc(domain,range))->hashcons(); | |
4867 } | |
4868 | |
4869 //------------------------------make------------------------------------------- | |
4870 const TypeFunc *TypeFunc::make(ciMethod* method) { | |
4871 Compile* C = Compile::current(); | |
4872 const TypeFunc* tf = C->last_tf(method); // check cache | |
4873 if (tf != NULL) return tf; // The hit rate here is almost 50%. | |
4874 const TypeTuple *domain; | |
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4875 if (method->is_static()) { |
0 | 4876 domain = TypeTuple::make_domain(NULL, method->signature()); |
4877 } else { | |
4878 domain = TypeTuple::make_domain(method->holder(), method->signature()); | |
4879 } | |
4880 const TypeTuple *range = TypeTuple::make_range(method->signature()); | |
4881 tf = TypeFunc::make(domain, range); | |
4882 C->set_last_tf(method, tf); // fill cache | |
4883 return tf; | |
4884 } | |
4885 | |
4886 //------------------------------meet------------------------------------------- | |
4887 // Compute the MEET of two types. It returns a new Type object. | |
4888 const Type *TypeFunc::xmeet( const Type *t ) const { | |
4889 // Perform a fast test for common case; meeting the same types together. | |
4890 if( this == t ) return this; // Meeting same type-rep? | |
4891 | |
4892 // Current "this->_base" is Func | |
4893 switch (t->base()) { // switch on original type | |
4894 | |
4895 case Bottom: // Ye Olde Default | |
4896 return t; | |
4897 | |
4898 default: // All else is a mistake | |
4899 typerr(t); | |
4900 | |
4901 case Top: | |
4902 break; | |
4903 } | |
4904 return this; // Return the double constant | |
4905 } | |
4906 | |
4907 //------------------------------xdual------------------------------------------ | |
4908 // Dual: compute field-by-field dual | |
4909 const Type *TypeFunc::xdual() const { | |
4910 return this; | |
4911 } | |
4912 | |
4913 //------------------------------eq--------------------------------------------- | |
4914 // Structural equality check for Type representations | |
4915 bool TypeFunc::eq( const Type *t ) const { | |
4916 const TypeFunc *a = (const TypeFunc*)t; | |
4917 return _domain == a->_domain && | |
4918 _range == a->_range; | |
4919 } | |
4920 | |
4921 //------------------------------hash------------------------------------------- | |
4922 // Type-specific hashing function. | |
4923 int TypeFunc::hash(void) const { | |
4924 return (intptr_t)_domain + (intptr_t)_range; | |
4925 } | |
4926 | |
4927 //------------------------------dump2------------------------------------------ | |
4928 // Dump Function Type | |
4929 #ifndef PRODUCT | |
4930 void TypeFunc::dump2( Dict &d, uint depth, outputStream *st ) const { | |
4931 if( _range->_cnt <= Parms ) | |
4932 st->print("void"); | |
4933 else { | |
4934 uint i; | |
4935 for (i = Parms; i < _range->_cnt-1; i++) { | |
4936 _range->field_at(i)->dump2(d,depth,st); | |
4937 st->print("/"); | |
4938 } | |
4939 _range->field_at(i)->dump2(d,depth,st); | |
4940 } | |
4941 st->print(" "); | |
4942 st->print("( "); | |
4943 if( !depth || d[this] ) { // Check for recursive dump | |
4944 st->print("...)"); | |
4945 return; | |
4946 } | |
4947 d.Insert((void*)this,(void*)this); // Stop recursion | |
4948 if (Parms < _domain->_cnt) | |
4949 _domain->field_at(Parms)->dump2(d,depth-1,st); | |
4950 for (uint i = Parms+1; i < _domain->_cnt; i++) { | |
4951 st->print(", "); | |
4952 _domain->field_at(i)->dump2(d,depth-1,st); | |
4953 } | |
4954 st->print(" )"); | |
4955 } | |
4956 #endif | |
4957 | |
4958 //------------------------------singleton-------------------------------------- | |
4959 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
4960 // constants (Ldi nodes). Singletons are integer, float or double constants | |
4961 // or a single symbol. | |
4962 bool TypeFunc::singleton(void) const { | |
4963 return false; // Never a singleton | |
4964 } | |
4965 | |
4966 bool TypeFunc::empty(void) const { | |
4967 return false; // Never empty | |
4968 } | |
4969 | |
4970 | |
4971 BasicType TypeFunc::return_type() const{ | |
4972 if (range()->cnt() == TypeFunc::Parms) { | |
4973 return T_VOID; | |
4974 } | |
4975 return range()->field_at(TypeFunc::Parms)->basic_type(); | |
4976 } |