Mercurial > hg > truffle
annotate src/share/vm/opto/type.cpp @ 7598:f9bda35f4226
8005816: Shark: fix volatile float field access
Reviewed-by: twisti
Contributed-by: Roman Kennke <rkennke@redhat.com>
author | twisti |
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date | Fri, 11 Jan 2013 16:47:23 -0800 |
parents | aaeb9add1ab3 |
children | 203f64878aab |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
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26 #include "ci/ciMethodData.hpp" |
1972 | 27 #include "ci/ciTypeFlow.hpp" |
28 #include "classfile/symbolTable.hpp" | |
29 #include "classfile/systemDictionary.hpp" | |
30 #include "compiler/compileLog.hpp" | |
31 #include "libadt/dict.hpp" | |
32 #include "memory/gcLocker.hpp" | |
33 #include "memory/oopFactory.hpp" | |
34 #include "memory/resourceArea.hpp" | |
35 #include "oops/instanceKlass.hpp" | |
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36 #include "oops/instanceMirrorKlass.hpp" |
1972 | 37 #include "oops/objArrayKlass.hpp" |
38 #include "oops/typeArrayKlass.hpp" | |
39 #include "opto/matcher.hpp" | |
40 #include "opto/node.hpp" | |
41 #include "opto/opcodes.hpp" | |
42 #include "opto/type.hpp" | |
43 | |
0 | 44 // Portions of code courtesy of Clifford Click |
45 | |
46 // Optimization - Graph Style | |
47 | |
48 // Dictionary of types shared among compilations. | |
49 Dict* Type::_shared_type_dict = NULL; | |
50 | |
51 // Array which maps compiler types to Basic Types | |
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52 Type::TypeInfo Type::_type_info[Type::lastype] = { |
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53 { Bad, T_ILLEGAL, "bad", false, Node::NotAMachineReg, relocInfo::none }, // Bad |
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54 { Control, T_ILLEGAL, "control", false, 0, relocInfo::none }, // Control |
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55 { Bottom, T_VOID, "top", false, 0, relocInfo::none }, // Top |
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56 { Bad, T_INT, "int:", false, Op_RegI, relocInfo::none }, // Int |
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57 { Bad, T_LONG, "long:", false, Op_RegL, relocInfo::none }, // Long |
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58 { Half, T_VOID, "half", false, 0, relocInfo::none }, // Half |
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59 { Bad, T_NARROWOOP, "narrowoop:", false, Op_RegN, relocInfo::none }, // NarrowOop |
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60 { Bad, T_NARROWKLASS,"narrowklass:", false, Op_RegN, relocInfo::none }, // NarrowKlass |
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61 { Bad, T_ILLEGAL, "tuple:", false, Node::NotAMachineReg, relocInfo::none }, // Tuple |
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62 { Bad, T_ARRAY, "array:", false, Node::NotAMachineReg, relocInfo::none }, // Array |
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63 |
6890 | 64 #ifndef SPARC |
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65 { Bad, T_ILLEGAL, "vectors:", false, Op_VecS, relocInfo::none }, // VectorS |
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66 { Bad, T_ILLEGAL, "vectord:", false, Op_VecD, relocInfo::none }, // VectorD |
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67 { Bad, T_ILLEGAL, "vectorx:", false, Op_VecX, relocInfo::none }, // VectorX |
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68 { Bad, T_ILLEGAL, "vectory:", false, Op_VecY, relocInfo::none }, // VectorY |
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69 #else |
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70 { Bad, T_ILLEGAL, "vectors:", false, 0, relocInfo::none }, // VectorS |
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71 { Bad, T_ILLEGAL, "vectord:", false, Op_RegD, relocInfo::none }, // VectorD |
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72 { Bad, T_ILLEGAL, "vectorx:", false, 0, relocInfo::none }, // VectorX |
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73 { Bad, T_ILLEGAL, "vectory:", false, 0, relocInfo::none }, // VectorY |
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74 #endif // IA32 || AMD64 |
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75 { Bad, T_ADDRESS, "anyptr:", false, Op_RegP, relocInfo::none }, // AnyPtr |
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76 { Bad, T_ADDRESS, "rawptr:", false, Op_RegP, relocInfo::none }, // RawPtr |
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77 { Bad, T_OBJECT, "oop:", true, Op_RegP, relocInfo::oop_type }, // OopPtr |
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78 { Bad, T_OBJECT, "inst:", true, Op_RegP, relocInfo::oop_type }, // InstPtr |
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79 { Bad, T_OBJECT, "ary:", true, Op_RegP, relocInfo::oop_type }, // AryPtr |
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80 { Bad, T_METADATA, "metadata:", false, Op_RegP, relocInfo::metadata_type }, // MetadataPtr |
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81 { Bad, T_METADATA, "klass:", false, Op_RegP, relocInfo::metadata_type }, // KlassPtr |
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82 { Bad, T_OBJECT, "func", false, 0, relocInfo::none }, // Function |
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83 { Abio, T_ILLEGAL, "abIO", false, 0, relocInfo::none }, // Abio |
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84 { Return_Address, T_ADDRESS, "return_address",false, Op_RegP, relocInfo::none }, // Return_Address |
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85 { Memory, T_ILLEGAL, "memory", false, 0, relocInfo::none }, // Memory |
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86 { FloatBot, T_FLOAT, "float_top", false, Op_RegF, relocInfo::none }, // FloatTop |
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87 { FloatCon, T_FLOAT, "ftcon:", false, Op_RegF, relocInfo::none }, // FloatCon |
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88 { FloatTop, T_FLOAT, "float", false, Op_RegF, relocInfo::none }, // FloatBot |
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89 { DoubleBot, T_DOUBLE, "double_top", false, Op_RegD, relocInfo::none }, // DoubleTop |
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90 { DoubleCon, T_DOUBLE, "dblcon:", false, Op_RegD, relocInfo::none }, // DoubleCon |
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91 { DoubleTop, T_DOUBLE, "double", false, Op_RegD, relocInfo::none }, // DoubleBot |
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92 { Top, T_ILLEGAL, "bottom", false, 0, relocInfo::none } // Bottom |
0 | 93 }; |
94 | |
95 // Map ideal registers (machine types) to ideal types | |
96 const Type *Type::mreg2type[_last_machine_leaf]; | |
97 | |
98 // Map basic types to canonical Type* pointers. | |
99 const Type* Type:: _const_basic_type[T_CONFLICT+1]; | |
100 | |
101 // Map basic types to constant-zero Types. | |
102 const Type* Type:: _zero_type[T_CONFLICT+1]; | |
103 | |
104 // Map basic types to array-body alias types. | |
105 const TypeAryPtr* TypeAryPtr::_array_body_type[T_CONFLICT+1]; | |
106 | |
107 //============================================================================= | |
108 // Convenience common pre-built types. | |
109 const Type *Type::ABIO; // State-of-machine only | |
110 const Type *Type::BOTTOM; // All values | |
111 const Type *Type::CONTROL; // Control only | |
112 const Type *Type::DOUBLE; // All doubles | |
113 const Type *Type::FLOAT; // All floats | |
114 const Type *Type::HALF; // Placeholder half of doublewide type | |
115 const Type *Type::MEMORY; // Abstract store only | |
116 const Type *Type::RETURN_ADDRESS; | |
117 const Type *Type::TOP; // No values in set | |
118 | |
119 //------------------------------get_const_type--------------------------- | |
120 const Type* Type::get_const_type(ciType* type) { | |
121 if (type == NULL) { | |
122 return NULL; | |
123 } else if (type->is_primitive_type()) { | |
124 return get_const_basic_type(type->basic_type()); | |
125 } else { | |
126 return TypeOopPtr::make_from_klass(type->as_klass()); | |
127 } | |
128 } | |
129 | |
130 //---------------------------array_element_basic_type--------------------------------- | |
131 // Mapping to the array element's basic type. | |
132 BasicType Type::array_element_basic_type() const { | |
133 BasicType bt = basic_type(); | |
134 if (bt == T_INT) { | |
135 if (this == TypeInt::INT) return T_INT; | |
136 if (this == TypeInt::CHAR) return T_CHAR; | |
137 if (this == TypeInt::BYTE) return T_BYTE; | |
138 if (this == TypeInt::BOOL) return T_BOOLEAN; | |
139 if (this == TypeInt::SHORT) return T_SHORT; | |
140 return T_VOID; | |
141 } | |
142 return bt; | |
143 } | |
144 | |
145 //---------------------------get_typeflow_type--------------------------------- | |
146 // Import a type produced by ciTypeFlow. | |
147 const Type* Type::get_typeflow_type(ciType* type) { | |
148 switch (type->basic_type()) { | |
149 | |
150 case ciTypeFlow::StateVector::T_BOTTOM: | |
151 assert(type == ciTypeFlow::StateVector::bottom_type(), ""); | |
152 return Type::BOTTOM; | |
153 | |
154 case ciTypeFlow::StateVector::T_TOP: | |
155 assert(type == ciTypeFlow::StateVector::top_type(), ""); | |
156 return Type::TOP; | |
157 | |
158 case ciTypeFlow::StateVector::T_NULL: | |
159 assert(type == ciTypeFlow::StateVector::null_type(), ""); | |
160 return TypePtr::NULL_PTR; | |
161 | |
162 case ciTypeFlow::StateVector::T_LONG2: | |
163 // The ciTypeFlow pass pushes a long, then the half. | |
164 // We do the same. | |
165 assert(type == ciTypeFlow::StateVector::long2_type(), ""); | |
166 return TypeInt::TOP; | |
167 | |
168 case ciTypeFlow::StateVector::T_DOUBLE2: | |
169 // The ciTypeFlow pass pushes double, then the half. | |
170 // Our convention is the same. | |
171 assert(type == ciTypeFlow::StateVector::double2_type(), ""); | |
172 return Type::TOP; | |
173 | |
174 case T_ADDRESS: | |
175 assert(type->is_return_address(), ""); | |
176 return TypeRawPtr::make((address)(intptr_t)type->as_return_address()->bci()); | |
177 | |
178 default: | |
179 // make sure we did not mix up the cases: | |
180 assert(type != ciTypeFlow::StateVector::bottom_type(), ""); | |
181 assert(type != ciTypeFlow::StateVector::top_type(), ""); | |
182 assert(type != ciTypeFlow::StateVector::null_type(), ""); | |
183 assert(type != ciTypeFlow::StateVector::long2_type(), ""); | |
184 assert(type != ciTypeFlow::StateVector::double2_type(), ""); | |
185 assert(!type->is_return_address(), ""); | |
186 | |
187 return Type::get_const_type(type); | |
188 } | |
189 } | |
190 | |
191 | |
192 //------------------------------make------------------------------------------- | |
193 // Create a simple Type, with default empty symbol sets. Then hashcons it | |
194 // and look for an existing copy in the type dictionary. | |
195 const Type *Type::make( enum TYPES t ) { | |
196 return (new Type(t))->hashcons(); | |
197 } | |
223 | 198 |
0 | 199 //------------------------------cmp-------------------------------------------- |
200 int Type::cmp( const Type *const t1, const Type *const t2 ) { | |
201 if( t1->_base != t2->_base ) | |
202 return 1; // Missed badly | |
203 assert(t1 != t2 || t1->eq(t2), "eq must be reflexive"); | |
204 return !t1->eq(t2); // Return ZERO if equal | |
205 } | |
206 | |
207 //------------------------------hash------------------------------------------- | |
208 int Type::uhash( const Type *const t ) { | |
209 return t->hash(); | |
210 } | |
211 | |
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212 #define SMALLINT ((juint)3) // a value too insignificant to consider widening |
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213 |
0 | 214 //--------------------------Initialize_shared---------------------------------- |
215 void Type::Initialize_shared(Compile* current) { | |
216 // This method does not need to be locked because the first system | |
217 // compilations (stub compilations) occur serially. If they are | |
218 // changed to proceed in parallel, then this section will need | |
219 // locking. | |
220 | |
221 Arena* save = current->type_arena(); | |
6197 | 222 Arena* shared_type_arena = new (mtCompiler)Arena(); |
0 | 223 |
224 current->set_type_arena(shared_type_arena); | |
225 _shared_type_dict = | |
226 new (shared_type_arena) Dict( (CmpKey)Type::cmp, (Hash)Type::uhash, | |
227 shared_type_arena, 128 ); | |
228 current->set_type_dict(_shared_type_dict); | |
229 | |
230 // Make shared pre-built types. | |
231 CONTROL = make(Control); // Control only | |
232 TOP = make(Top); // No values in set | |
233 MEMORY = make(Memory); // Abstract store only | |
234 ABIO = make(Abio); // State-of-machine only | |
235 RETURN_ADDRESS=make(Return_Address); | |
236 FLOAT = make(FloatBot); // All floats | |
237 DOUBLE = make(DoubleBot); // All doubles | |
238 BOTTOM = make(Bottom); // Everything | |
239 HALF = make(Half); // Placeholder half of doublewide type | |
240 | |
241 TypeF::ZERO = TypeF::make(0.0); // Float 0 (positive zero) | |
242 TypeF::ONE = TypeF::make(1.0); // Float 1 | |
243 | |
244 TypeD::ZERO = TypeD::make(0.0); // Double 0 (positive zero) | |
245 TypeD::ONE = TypeD::make(1.0); // Double 1 | |
246 | |
247 TypeInt::MINUS_1 = TypeInt::make(-1); // -1 | |
248 TypeInt::ZERO = TypeInt::make( 0); // 0 | |
249 TypeInt::ONE = TypeInt::make( 1); // 1 | |
250 TypeInt::BOOL = TypeInt::make(0,1, WidenMin); // 0 or 1, FALSE or TRUE. | |
251 TypeInt::CC = TypeInt::make(-1, 1, WidenMin); // -1, 0 or 1, condition codes | |
252 TypeInt::CC_LT = TypeInt::make(-1,-1, WidenMin); // == TypeInt::MINUS_1 | |
253 TypeInt::CC_GT = TypeInt::make( 1, 1, WidenMin); // == TypeInt::ONE | |
254 TypeInt::CC_EQ = TypeInt::make( 0, 0, WidenMin); // == TypeInt::ZERO | |
255 TypeInt::CC_LE = TypeInt::make(-1, 0, WidenMin); | |
256 TypeInt::CC_GE = TypeInt::make( 0, 1, WidenMin); // == TypeInt::BOOL | |
257 TypeInt::BYTE = TypeInt::make(-128,127, WidenMin); // Bytes | |
624 | 258 TypeInt::UBYTE = TypeInt::make(0, 255, WidenMin); // Unsigned Bytes |
0 | 259 TypeInt::CHAR = TypeInt::make(0,65535, WidenMin); // Java chars |
260 TypeInt::SHORT = TypeInt::make(-32768,32767, WidenMin); // Java shorts | |
261 TypeInt::POS = TypeInt::make(0,max_jint, WidenMin); // Non-neg values | |
262 TypeInt::POS1 = TypeInt::make(1,max_jint, WidenMin); // Positive values | |
263 TypeInt::INT = TypeInt::make(min_jint,max_jint, WidenMax); // 32-bit integers | |
264 TypeInt::SYMINT = TypeInt::make(-max_jint,max_jint,WidenMin); // symmetric range | |
265 // CmpL is overloaded both as the bytecode computation returning | |
266 // a trinary (-1,0,+1) integer result AND as an efficient long | |
267 // compare returning optimizer ideal-type flags. | |
268 assert( TypeInt::CC_LT == TypeInt::MINUS_1, "types must match for CmpL to work" ); | |
269 assert( TypeInt::CC_GT == TypeInt::ONE, "types must match for CmpL to work" ); | |
270 assert( TypeInt::CC_EQ == TypeInt::ZERO, "types must match for CmpL to work" ); | |
271 assert( TypeInt::CC_GE == TypeInt::BOOL, "types must match for CmpL to work" ); | |
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272 assert( (juint)(TypeInt::CC->_hi - TypeInt::CC->_lo) <= SMALLINT, "CC is truly small"); |
0 | 273 |
274 TypeLong::MINUS_1 = TypeLong::make(-1); // -1 | |
275 TypeLong::ZERO = TypeLong::make( 0); // 0 | |
276 TypeLong::ONE = TypeLong::make( 1); // 1 | |
277 TypeLong::POS = TypeLong::make(0,max_jlong, WidenMin); // Non-neg values | |
278 TypeLong::LONG = TypeLong::make(min_jlong,max_jlong,WidenMax); // 64-bit integers | |
279 TypeLong::INT = TypeLong::make((jlong)min_jint,(jlong)max_jint,WidenMin); | |
280 TypeLong::UINT = TypeLong::make(0,(jlong)max_juint,WidenMin); | |
281 | |
282 const Type **fboth =(const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*)); | |
283 fboth[0] = Type::CONTROL; | |
284 fboth[1] = Type::CONTROL; | |
285 TypeTuple::IFBOTH = TypeTuple::make( 2, fboth ); | |
286 | |
287 const Type **ffalse =(const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*)); | |
288 ffalse[0] = Type::CONTROL; | |
289 ffalse[1] = Type::TOP; | |
290 TypeTuple::IFFALSE = TypeTuple::make( 2, ffalse ); | |
291 | |
292 const Type **fneither =(const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*)); | |
293 fneither[0] = Type::TOP; | |
294 fneither[1] = Type::TOP; | |
295 TypeTuple::IFNEITHER = TypeTuple::make( 2, fneither ); | |
296 | |
297 const Type **ftrue =(const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*)); | |
298 ftrue[0] = Type::TOP; | |
299 ftrue[1] = Type::CONTROL; | |
300 TypeTuple::IFTRUE = TypeTuple::make( 2, ftrue ); | |
301 | |
302 const Type **floop =(const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*)); | |
303 floop[0] = Type::CONTROL; | |
304 floop[1] = TypeInt::INT; | |
305 TypeTuple::LOOPBODY = TypeTuple::make( 2, floop ); | |
306 | |
307 TypePtr::NULL_PTR= TypePtr::make( AnyPtr, TypePtr::Null, 0 ); | |
308 TypePtr::NOTNULL = TypePtr::make( AnyPtr, TypePtr::NotNull, OffsetBot ); | |
309 TypePtr::BOTTOM = TypePtr::make( AnyPtr, TypePtr::BotPTR, OffsetBot ); | |
310 | |
311 TypeRawPtr::BOTTOM = TypeRawPtr::make( TypePtr::BotPTR ); | |
312 TypeRawPtr::NOTNULL= TypeRawPtr::make( TypePtr::NotNull ); | |
313 | |
314 const Type **fmembar = TypeTuple::fields(0); | |
315 TypeTuple::MEMBAR = TypeTuple::make(TypeFunc::Parms+0, fmembar); | |
316 | |
317 const Type **fsc = (const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*)); | |
318 fsc[0] = TypeInt::CC; | |
319 fsc[1] = Type::MEMORY; | |
320 TypeTuple::STORECONDITIONAL = TypeTuple::make(2, fsc); | |
321 | |
322 TypeInstPtr::NOTNULL = TypeInstPtr::make(TypePtr::NotNull, current->env()->Object_klass()); | |
323 TypeInstPtr::BOTTOM = TypeInstPtr::make(TypePtr::BotPTR, current->env()->Object_klass()); | |
324 TypeInstPtr::MIRROR = TypeInstPtr::make(TypePtr::NotNull, current->env()->Class_klass()); | |
325 TypeInstPtr::MARK = TypeInstPtr::make(TypePtr::BotPTR, current->env()->Object_klass(), | |
326 false, 0, oopDesc::mark_offset_in_bytes()); | |
327 TypeInstPtr::KLASS = TypeInstPtr::make(TypePtr::BotPTR, current->env()->Object_klass(), | |
328 false, 0, oopDesc::klass_offset_in_bytes()); | |
992 | 329 TypeOopPtr::BOTTOM = TypeOopPtr::make(TypePtr::BotPTR, OffsetBot, TypeOopPtr::InstanceBot); |
0 | 330 |
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331 TypeMetadataPtr::BOTTOM = TypeMetadataPtr::make(TypePtr::BotPTR, NULL, OffsetBot); |
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332 |
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333 TypeNarrowOop::NULL_PTR = TypeNarrowOop::make( TypePtr::NULL_PTR ); |
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334 TypeNarrowOop::BOTTOM = TypeNarrowOop::make( TypeInstPtr::BOTTOM ); |
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335 |
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336 TypeNarrowKlass::NULL_PTR = TypeNarrowKlass::make( TypePtr::NULL_PTR ); |
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337 |
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338 mreg2type[Op_Node] = Type::BOTTOM; |
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339 mreg2type[Op_Set ] = 0; |
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340 mreg2type[Op_RegN] = TypeNarrowOop::BOTTOM; |
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341 mreg2type[Op_RegI] = TypeInt::INT; |
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342 mreg2type[Op_RegP] = TypePtr::BOTTOM; |
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343 mreg2type[Op_RegF] = Type::FLOAT; |
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344 mreg2type[Op_RegD] = Type::DOUBLE; |
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345 mreg2type[Op_RegL] = TypeLong::LONG; |
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346 mreg2type[Op_RegFlags] = TypeInt::CC; |
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347 |
1761 | 348 TypeAryPtr::RANGE = TypeAryPtr::make( TypePtr::BotPTR, TypeAry::make(Type::BOTTOM,TypeInt::POS), NULL /* current->env()->Object_klass() */, false, arrayOopDesc::length_offset_in_bytes()); |
163 | 349 |
350 TypeAryPtr::NARROWOOPS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeNarrowOop::BOTTOM, TypeInt::POS), NULL /*ciArrayKlass::make(o)*/, false, Type::OffsetBot); | |
351 | |
352 #ifdef _LP64 | |
353 if (UseCompressedOops) { | |
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354 assert(TypeAryPtr::NARROWOOPS->is_ptr_to_narrowoop(), "array of narrow oops must be ptr to narrow oop"); |
163 | 355 TypeAryPtr::OOPS = TypeAryPtr::NARROWOOPS; |
356 } else | |
357 #endif | |
358 { | |
359 // There is no shared klass for Object[]. See note in TypeAryPtr::klass(). | |
360 TypeAryPtr::OOPS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInstPtr::BOTTOM,TypeInt::POS), NULL /*ciArrayKlass::make(o)*/, false, Type::OffsetBot); | |
361 } | |
0 | 362 TypeAryPtr::BYTES = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::BYTE ,TypeInt::POS), ciTypeArrayKlass::make(T_BYTE), true, Type::OffsetBot); |
363 TypeAryPtr::SHORTS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::SHORT ,TypeInt::POS), ciTypeArrayKlass::make(T_SHORT), true, Type::OffsetBot); | |
364 TypeAryPtr::CHARS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::CHAR ,TypeInt::POS), ciTypeArrayKlass::make(T_CHAR), true, Type::OffsetBot); | |
365 TypeAryPtr::INTS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::INT ,TypeInt::POS), ciTypeArrayKlass::make(T_INT), true, Type::OffsetBot); | |
366 TypeAryPtr::LONGS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeLong::LONG ,TypeInt::POS), ciTypeArrayKlass::make(T_LONG), true, Type::OffsetBot); | |
367 TypeAryPtr::FLOATS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(Type::FLOAT ,TypeInt::POS), ciTypeArrayKlass::make(T_FLOAT), true, Type::OffsetBot); | |
368 TypeAryPtr::DOUBLES = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(Type::DOUBLE ,TypeInt::POS), ciTypeArrayKlass::make(T_DOUBLE), true, Type::OffsetBot); | |
369 | |
163 | 370 // Nobody should ask _array_body_type[T_NARROWOOP]. Use NULL as assert. |
371 TypeAryPtr::_array_body_type[T_NARROWOOP] = NULL; | |
0 | 372 TypeAryPtr::_array_body_type[T_OBJECT] = TypeAryPtr::OOPS; |
163 | 373 TypeAryPtr::_array_body_type[T_ARRAY] = TypeAryPtr::OOPS; // arrays are stored in oop arrays |
0 | 374 TypeAryPtr::_array_body_type[T_BYTE] = TypeAryPtr::BYTES; |
375 TypeAryPtr::_array_body_type[T_BOOLEAN] = TypeAryPtr::BYTES; // boolean[] is a byte array | |
376 TypeAryPtr::_array_body_type[T_SHORT] = TypeAryPtr::SHORTS; | |
377 TypeAryPtr::_array_body_type[T_CHAR] = TypeAryPtr::CHARS; | |
378 TypeAryPtr::_array_body_type[T_INT] = TypeAryPtr::INTS; | |
379 TypeAryPtr::_array_body_type[T_LONG] = TypeAryPtr::LONGS; | |
380 TypeAryPtr::_array_body_type[T_FLOAT] = TypeAryPtr::FLOATS; | |
381 TypeAryPtr::_array_body_type[T_DOUBLE] = TypeAryPtr::DOUBLES; | |
382 | |
383 TypeKlassPtr::OBJECT = TypeKlassPtr::make( TypePtr::NotNull, current->env()->Object_klass(), 0 ); | |
384 TypeKlassPtr::OBJECT_OR_NULL = TypeKlassPtr::make( TypePtr::BotPTR, current->env()->Object_klass(), 0 ); | |
385 | |
386 const Type **fi2c = TypeTuple::fields(2); | |
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387 fi2c[TypeFunc::Parms+0] = TypeInstPtr::BOTTOM; // Method* |
0 | 388 fi2c[TypeFunc::Parms+1] = TypeRawPtr::BOTTOM; // argument pointer |
389 TypeTuple::START_I2C = TypeTuple::make(TypeFunc::Parms+2, fi2c); | |
390 | |
391 const Type **intpair = TypeTuple::fields(2); | |
392 intpair[0] = TypeInt::INT; | |
393 intpair[1] = TypeInt::INT; | |
394 TypeTuple::INT_PAIR = TypeTuple::make(2, intpair); | |
395 | |
396 const Type **longpair = TypeTuple::fields(2); | |
397 longpair[0] = TypeLong::LONG; | |
398 longpair[1] = TypeLong::LONG; | |
399 TypeTuple::LONG_PAIR = TypeTuple::make(2, longpair); | |
400 | |
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401 _const_basic_type[T_NARROWOOP] = TypeNarrowOop::BOTTOM; |
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402 _const_basic_type[T_NARROWKLASS] = Type::BOTTOM; |
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403 _const_basic_type[T_BOOLEAN] = TypeInt::BOOL; |
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404 _const_basic_type[T_CHAR] = TypeInt::CHAR; |
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405 _const_basic_type[T_BYTE] = TypeInt::BYTE; |
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406 _const_basic_type[T_SHORT] = TypeInt::SHORT; |
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407 _const_basic_type[T_INT] = TypeInt::INT; |
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408 _const_basic_type[T_LONG] = TypeLong::LONG; |
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409 _const_basic_type[T_FLOAT] = Type::FLOAT; |
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410 _const_basic_type[T_DOUBLE] = Type::DOUBLE; |
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411 _const_basic_type[T_OBJECT] = TypeInstPtr::BOTTOM; |
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412 _const_basic_type[T_ARRAY] = TypeInstPtr::BOTTOM; // there is no separate bottom for arrays |
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413 _const_basic_type[T_VOID] = TypePtr::NULL_PTR; // reflection represents void this way |
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414 _const_basic_type[T_ADDRESS] = TypeRawPtr::BOTTOM; // both interpreter return addresses & random raw ptrs |
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415 _const_basic_type[T_CONFLICT] = Type::BOTTOM; // why not? |
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416 |
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417 _zero_type[T_NARROWOOP] = TypeNarrowOop::NULL_PTR; |
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418 _zero_type[T_NARROWKLASS] = TypeNarrowKlass::NULL_PTR; |
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419 _zero_type[T_BOOLEAN] = TypeInt::ZERO; // false == 0 |
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420 _zero_type[T_CHAR] = TypeInt::ZERO; // '\0' == 0 |
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421 _zero_type[T_BYTE] = TypeInt::ZERO; // 0x00 == 0 |
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422 _zero_type[T_SHORT] = TypeInt::ZERO; // 0x0000 == 0 |
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423 _zero_type[T_INT] = TypeInt::ZERO; |
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424 _zero_type[T_LONG] = TypeLong::ZERO; |
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425 _zero_type[T_FLOAT] = TypeF::ZERO; |
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426 _zero_type[T_DOUBLE] = TypeD::ZERO; |
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427 _zero_type[T_OBJECT] = TypePtr::NULL_PTR; |
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428 _zero_type[T_ARRAY] = TypePtr::NULL_PTR; // null array is null oop |
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429 _zero_type[T_ADDRESS] = TypePtr::NULL_PTR; // raw pointers use the same null |
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430 _zero_type[T_VOID] = Type::TOP; // the only void value is no value at all |
0 | 431 |
432 // get_zero_type() should not happen for T_CONFLICT | |
433 _zero_type[T_CONFLICT]= NULL; | |
434 | |
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435 // Vector predefined types, it needs initialized _const_basic_type[]. |
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436 if (Matcher::vector_size_supported(T_BYTE,4)) { |
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437 TypeVect::VECTS = TypeVect::make(T_BYTE,4); |
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438 } |
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439 if (Matcher::vector_size_supported(T_FLOAT,2)) { |
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440 TypeVect::VECTD = TypeVect::make(T_FLOAT,2); |
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441 } |
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442 if (Matcher::vector_size_supported(T_FLOAT,4)) { |
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443 TypeVect::VECTX = TypeVect::make(T_FLOAT,4); |
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444 } |
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445 if (Matcher::vector_size_supported(T_FLOAT,8)) { |
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446 TypeVect::VECTY = TypeVect::make(T_FLOAT,8); |
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447 } |
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448 mreg2type[Op_VecS] = TypeVect::VECTS; |
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449 mreg2type[Op_VecD] = TypeVect::VECTD; |
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450 mreg2type[Op_VecX] = TypeVect::VECTX; |
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451 mreg2type[Op_VecY] = TypeVect::VECTY; |
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452 |
0 | 453 // Restore working type arena. |
454 current->set_type_arena(save); | |
455 current->set_type_dict(NULL); | |
456 } | |
457 | |
458 //------------------------------Initialize------------------------------------- | |
459 void Type::Initialize(Compile* current) { | |
460 assert(current->type_arena() != NULL, "must have created type arena"); | |
461 | |
462 if (_shared_type_dict == NULL) { | |
463 Initialize_shared(current); | |
464 } | |
465 | |
466 Arena* type_arena = current->type_arena(); | |
467 | |
468 // Create the hash-cons'ing dictionary with top-level storage allocation | |
469 Dict *tdic = new (type_arena) Dict( (CmpKey)Type::cmp,(Hash)Type::uhash, type_arena, 128 ); | |
470 current->set_type_dict(tdic); | |
471 | |
472 // Transfer the shared types. | |
473 DictI i(_shared_type_dict); | |
474 for( ; i.test(); ++i ) { | |
475 Type* t = (Type*)i._value; | |
476 tdic->Insert(t,t); // New Type, insert into Type table | |
477 } | |
478 } | |
479 | |
480 //------------------------------hashcons--------------------------------------- | |
481 // Do the hash-cons trick. If the Type already exists in the type table, | |
482 // delete the current Type and return the existing Type. Otherwise stick the | |
483 // current Type in the Type table. | |
484 const Type *Type::hashcons(void) { | |
485 debug_only(base()); // Check the assertion in Type::base(). | |
486 // Look up the Type in the Type dictionary | |
487 Dict *tdic = type_dict(); | |
488 Type* old = (Type*)(tdic->Insert(this, this, false)); | |
489 if( old ) { // Pre-existing Type? | |
490 if( old != this ) // Yes, this guy is not the pre-existing? | |
491 delete this; // Yes, Nuke this guy | |
492 assert( old->_dual, "" ); | |
493 return old; // Return pre-existing | |
494 } | |
495 | |
496 // Every type has a dual (to make my lattice symmetric). | |
497 // Since we just discovered a new Type, compute its dual right now. | |
498 assert( !_dual, "" ); // No dual yet | |
499 _dual = xdual(); // Compute the dual | |
500 if( cmp(this,_dual)==0 ) { // Handle self-symmetric | |
501 _dual = this; | |
502 return this; | |
503 } | |
504 assert( !_dual->_dual, "" ); // No reverse dual yet | |
505 assert( !(*tdic)[_dual], "" ); // Dual not in type system either | |
506 // New Type, insert into Type table | |
507 tdic->Insert((void*)_dual,(void*)_dual); | |
508 ((Type*)_dual)->_dual = this; // Finish up being symmetric | |
509 #ifdef ASSERT | |
510 Type *dual_dual = (Type*)_dual->xdual(); | |
511 assert( eq(dual_dual), "xdual(xdual()) should be identity" ); | |
512 delete dual_dual; | |
513 #endif | |
514 return this; // Return new Type | |
515 } | |
516 | |
517 //------------------------------eq--------------------------------------------- | |
518 // Structural equality check for Type representations | |
519 bool Type::eq( const Type * ) const { | |
520 return true; // Nothing else can go wrong | |
521 } | |
522 | |
523 //------------------------------hash------------------------------------------- | |
524 // Type-specific hashing function. | |
525 int Type::hash(void) const { | |
526 return _base; | |
527 } | |
528 | |
529 //------------------------------is_finite-------------------------------------- | |
530 // Has a finite value | |
531 bool Type::is_finite() const { | |
532 return false; | |
533 } | |
534 | |
535 //------------------------------is_nan----------------------------------------- | |
536 // Is not a number (NaN) | |
537 bool Type::is_nan() const { | |
538 return false; | |
539 } | |
540 | |
820
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541 //----------------------interface_vs_oop--------------------------------------- |
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542 #ifdef ASSERT |
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543 bool Type::interface_vs_oop(const Type *t) const { |
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544 bool result = false; |
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545 |
992 | 546 const TypePtr* this_ptr = this->make_ptr(); // In case it is narrow_oop |
547 const TypePtr* t_ptr = t->make_ptr(); | |
548 if( this_ptr == NULL || t_ptr == NULL ) | |
549 return result; | |
550 | |
551 const TypeInstPtr* this_inst = this_ptr->isa_instptr(); | |
552 const TypeInstPtr* t_inst = t_ptr->isa_instptr(); | |
820
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553 if( this_inst && this_inst->is_loaded() && t_inst && t_inst->is_loaded() ) { |
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554 bool this_interface = this_inst->klass()->is_interface(); |
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555 bool t_interface = t_inst->klass()->is_interface(); |
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556 result = this_interface ^ t_interface; |
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557 } |
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558 |
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559 return result; |
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560 } |
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561 #endif |
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562 |
0 | 563 //------------------------------meet------------------------------------------- |
564 // Compute the MEET of two types. NOT virtual. It enforces that meet is | |
565 // commutative and the lattice is symmetric. | |
566 const Type *Type::meet( const Type *t ) const { | |
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567 if (isa_narrowoop() && t->isa_narrowoop()) { |
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568 const Type* result = make_ptr()->meet(t->make_ptr()); |
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569 return result->make_narrowoop(); |
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570 } |
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571 if (isa_narrowklass() && t->isa_narrowklass()) { |
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572 const Type* result = make_ptr()->meet(t->make_ptr()); |
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573 return result->make_narrowklass(); |
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574 } |
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575 |
0 | 576 const Type *mt = xmeet(t); |
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577 if (isa_narrowoop() || t->isa_narrowoop()) return mt; |
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578 if (isa_narrowklass() || t->isa_narrowklass()) return mt; |
0 | 579 #ifdef ASSERT |
580 assert( mt == t->xmeet(this), "meet not commutative" ); | |
581 const Type* dual_join = mt->_dual; | |
582 const Type *t2t = dual_join->xmeet(t->_dual); | |
583 const Type *t2this = dual_join->xmeet( _dual); | |
584 | |
585 // Interface meet Oop is Not Symmetric: | |
586 // Interface:AnyNull meet Oop:AnyNull == Interface:AnyNull | |
587 // Interface:NotNull meet Oop:NotNull == java/lang/Object:NotNull | |
820
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588 |
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589 if( !interface_vs_oop(t) && (t2t != t->_dual || t2this != _dual) ) { |
0 | 590 tty->print_cr("=== Meet Not Symmetric ==="); |
591 tty->print("t = "); t->dump(); tty->cr(); | |
592 tty->print("this= "); dump(); tty->cr(); | |
593 tty->print("mt=(t meet this)= "); mt->dump(); tty->cr(); | |
594 | |
595 tty->print("t_dual= "); t->_dual->dump(); tty->cr(); | |
596 tty->print("this_dual= "); _dual->dump(); tty->cr(); | |
597 tty->print("mt_dual= "); mt->_dual->dump(); tty->cr(); | |
598 | |
599 tty->print("mt_dual meet t_dual= "); t2t ->dump(); tty->cr(); | |
600 tty->print("mt_dual meet this_dual= "); t2this ->dump(); tty->cr(); | |
601 | |
602 fatal("meet not symmetric" ); | |
603 } | |
604 #endif | |
605 return mt; | |
606 } | |
607 | |
608 //------------------------------xmeet------------------------------------------ | |
609 // Compute the MEET of two types. It returns a new Type object. | |
610 const Type *Type::xmeet( const Type *t ) const { | |
611 // Perform a fast test for common case; meeting the same types together. | |
612 if( this == t ) return this; // Meeting same type-rep? | |
613 | |
614 // Meeting TOP with anything? | |
615 if( _base == Top ) return t; | |
616 | |
617 // Meeting BOTTOM with anything? | |
618 if( _base == Bottom ) return BOTTOM; | |
619 | |
620 // Current "this->_base" is one of: Bad, Multi, Control, Top, | |
621 // Abio, Abstore, Floatxxx, Doublexxx, Bottom, lastype. | |
622 switch (t->base()) { // Switch on original type | |
623 | |
624 // Cut in half the number of cases I must handle. Only need cases for when | |
625 // the given enum "t->type" is less than or equal to the local enum "type". | |
626 case FloatCon: | |
627 case DoubleCon: | |
628 case Int: | |
629 case Long: | |
630 return t->xmeet(this); | |
631 | |
632 case OopPtr: | |
633 return t->xmeet(this); | |
634 | |
635 case InstPtr: | |
636 return t->xmeet(this); | |
637 | |
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638 case MetadataPtr: |
0 | 639 case KlassPtr: |
640 return t->xmeet(this); | |
641 | |
642 case AryPtr: | |
643 return t->xmeet(this); | |
644 | |
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645 case NarrowOop: |
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646 return t->xmeet(this); |
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647 |
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648 case NarrowKlass: |
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649 return t->xmeet(this); |
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650 |
0 | 651 case Bad: // Type check |
652 default: // Bogus type not in lattice | |
653 typerr(t); | |
654 return Type::BOTTOM; | |
655 | |
656 case Bottom: // Ye Olde Default | |
657 return t; | |
658 | |
659 case FloatTop: | |
660 if( _base == FloatTop ) return this; | |
661 case FloatBot: // Float | |
662 if( _base == FloatBot || _base == FloatTop ) return FLOAT; | |
663 if( _base == DoubleTop || _base == DoubleBot ) return Type::BOTTOM; | |
664 typerr(t); | |
665 return Type::BOTTOM; | |
666 | |
667 case DoubleTop: | |
668 if( _base == DoubleTop ) return this; | |
669 case DoubleBot: // Double | |
670 if( _base == DoubleBot || _base == DoubleTop ) return DOUBLE; | |
671 if( _base == FloatTop || _base == FloatBot ) return Type::BOTTOM; | |
672 typerr(t); | |
673 return Type::BOTTOM; | |
674 | |
675 // These next few cases must match exactly or it is a compile-time error. | |
676 case Control: // Control of code | |
677 case Abio: // State of world outside of program | |
678 case Memory: | |
679 if( _base == t->_base ) return this; | |
680 typerr(t); | |
681 return Type::BOTTOM; | |
682 | |
683 case Top: // Top of the lattice | |
684 return this; | |
685 } | |
686 | |
687 // The type is unchanged | |
688 return this; | |
689 } | |
690 | |
691 //-----------------------------filter------------------------------------------ | |
692 const Type *Type::filter( const Type *kills ) const { | |
693 const Type* ft = join(kills); | |
694 if (ft->empty()) | |
695 return Type::TOP; // Canonical empty value | |
696 return ft; | |
697 } | |
698 | |
699 //------------------------------xdual------------------------------------------ | |
700 // Compute dual right now. | |
701 const Type::TYPES Type::dual_type[Type::lastype] = { | |
702 Bad, // Bad | |
703 Control, // Control | |
704 Bottom, // Top | |
705 Bad, // Int - handled in v-call | |
706 Bad, // Long - handled in v-call | |
707 Half, // Half | |
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708 Bad, // NarrowOop - handled in v-call |
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709 Bad, // NarrowKlass - handled in v-call |
0 | 710 |
711 Bad, // Tuple - handled in v-call | |
712 Bad, // Array - handled in v-call | |
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713 Bad, // VectorS - handled in v-call |
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714 Bad, // VectorD - handled in v-call |
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715 Bad, // VectorX - handled in v-call |
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716 Bad, // VectorY - handled in v-call |
0 | 717 |
718 Bad, // AnyPtr - handled in v-call | |
719 Bad, // RawPtr - handled in v-call | |
720 Bad, // OopPtr - handled in v-call | |
721 Bad, // InstPtr - handled in v-call | |
722 Bad, // AryPtr - handled in v-call | |
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723 |
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724 Bad, // MetadataPtr - handled in v-call |
0 | 725 Bad, // KlassPtr - handled in v-call |
726 | |
727 Bad, // Function - handled in v-call | |
728 Abio, // Abio | |
729 Return_Address,// Return_Address | |
730 Memory, // Memory | |
731 FloatBot, // FloatTop | |
732 FloatCon, // FloatCon | |
733 FloatTop, // FloatBot | |
734 DoubleBot, // DoubleTop | |
735 DoubleCon, // DoubleCon | |
736 DoubleTop, // DoubleBot | |
737 Top // Bottom | |
738 }; | |
739 | |
740 const Type *Type::xdual() const { | |
741 // Note: the base() accessor asserts the sanity of _base. | |
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742 assert(_type_info[base()].dual_type != Bad, "implement with v-call"); |
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743 return new Type(_type_info[_base].dual_type); |
0 | 744 } |
745 | |
746 //------------------------------has_memory------------------------------------- | |
747 bool Type::has_memory() const { | |
748 Type::TYPES tx = base(); | |
749 if (tx == Memory) return true; | |
750 if (tx == Tuple) { | |
751 const TypeTuple *t = is_tuple(); | |
752 for (uint i=0; i < t->cnt(); i++) { | |
753 tx = t->field_at(i)->base(); | |
754 if (tx == Memory) return true; | |
755 } | |
756 } | |
757 return false; | |
758 } | |
759 | |
760 #ifndef PRODUCT | |
761 //------------------------------dump2------------------------------------------ | |
762 void Type::dump2( Dict &d, uint depth, outputStream *st ) const { | |
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763 st->print(_type_info[_base].msg); |
0 | 764 } |
765 | |
766 //------------------------------dump------------------------------------------- | |
767 void Type::dump_on(outputStream *st) const { | |
768 ResourceMark rm; | |
769 Dict d(cmpkey,hashkey); // Stop recursive type dumping | |
770 dump2(d,1, st); | |
163 | 771 if (is_ptr_to_narrowoop()) { |
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772 st->print(" [narrow]"); |
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773 } else if (is_ptr_to_narrowklass()) { |
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774 st->print(" [narrowklass]"); |
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775 } |
0 | 776 } |
777 #endif | |
778 | |
779 //------------------------------singleton-------------------------------------- | |
780 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
781 // constants (Ldi nodes). Singletons are integer, float or double constants. | |
782 bool Type::singleton(void) const { | |
783 return _base == Top || _base == Half; | |
784 } | |
785 | |
786 //------------------------------empty------------------------------------------ | |
787 // TRUE if Type is a type with no values, FALSE otherwise. | |
788 bool Type::empty(void) const { | |
789 switch (_base) { | |
790 case DoubleTop: | |
791 case FloatTop: | |
792 case Top: | |
793 return true; | |
794 | |
795 case Half: | |
796 case Abio: | |
797 case Return_Address: | |
798 case Memory: | |
799 case Bottom: | |
800 case FloatBot: | |
801 case DoubleBot: | |
802 return false; // never a singleton, therefore never empty | |
803 } | |
804 | |
805 ShouldNotReachHere(); | |
806 return false; | |
807 } | |
808 | |
809 //------------------------------dump_stats------------------------------------- | |
810 // Dump collected statistics to stderr | |
811 #ifndef PRODUCT | |
812 void Type::dump_stats() { | |
813 tty->print("Types made: %d\n", type_dict()->Size()); | |
814 } | |
815 #endif | |
816 | |
817 //------------------------------typerr----------------------------------------- | |
818 void Type::typerr( const Type *t ) const { | |
819 #ifndef PRODUCT | |
820 tty->print("\nError mixing types: "); | |
821 dump(); | |
822 tty->print(" and "); | |
823 t->dump(); | |
824 tty->print("\n"); | |
825 #endif | |
826 ShouldNotReachHere(); | |
827 } | |
828 | |
829 | |
830 //============================================================================= | |
831 // Convenience common pre-built types. | |
832 const TypeF *TypeF::ZERO; // Floating point zero | |
833 const TypeF *TypeF::ONE; // Floating point one | |
834 | |
835 //------------------------------make------------------------------------------- | |
836 // Create a float constant | |
837 const TypeF *TypeF::make(float f) { | |
838 return (TypeF*)(new TypeF(f))->hashcons(); | |
839 } | |
840 | |
841 //------------------------------meet------------------------------------------- | |
842 // Compute the MEET of two types. It returns a new Type object. | |
843 const Type *TypeF::xmeet( const Type *t ) const { | |
844 // Perform a fast test for common case; meeting the same types together. | |
845 if( this == t ) return this; // Meeting same type-rep? | |
846 | |
847 // Current "this->_base" is FloatCon | |
848 switch (t->base()) { // Switch on original type | |
849 case AnyPtr: // Mixing with oops happens when javac | |
850 case RawPtr: // reuses local variables | |
851 case OopPtr: | |
852 case InstPtr: | |
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853 case AryPtr: |
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854 case MetadataPtr: |
0 | 855 case KlassPtr: |
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856 case NarrowOop: |
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857 case NarrowKlass: |
0 | 858 case Int: |
859 case Long: | |
860 case DoubleTop: | |
861 case DoubleCon: | |
862 case DoubleBot: | |
863 case Bottom: // Ye Olde Default | |
864 return Type::BOTTOM; | |
865 | |
866 case FloatBot: | |
867 return t; | |
868 | |
869 default: // All else is a mistake | |
870 typerr(t); | |
871 | |
872 case FloatCon: // Float-constant vs Float-constant? | |
873 if( jint_cast(_f) != jint_cast(t->getf()) ) // unequal constants? | |
874 // must compare bitwise as positive zero, negative zero and NaN have | |
875 // all the same representation in C++ | |
876 return FLOAT; // Return generic float | |
877 // Equal constants | |
878 case Top: | |
879 case FloatTop: | |
880 break; // Return the float constant | |
881 } | |
882 return this; // Return the float constant | |
883 } | |
884 | |
885 //------------------------------xdual------------------------------------------ | |
886 // Dual: symmetric | |
887 const Type *TypeF::xdual() const { | |
888 return this; | |
889 } | |
890 | |
891 //------------------------------eq--------------------------------------------- | |
892 // Structural equality check for Type representations | |
893 bool TypeF::eq( const Type *t ) const { | |
894 if( g_isnan(_f) || | |
895 g_isnan(t->getf()) ) { | |
896 // One or both are NANs. If both are NANs return true, else false. | |
897 return (g_isnan(_f) && g_isnan(t->getf())); | |
898 } | |
899 if (_f == t->getf()) { | |
900 // (NaN is impossible at this point, since it is not equal even to itself) | |
901 if (_f == 0.0) { | |
902 // difference between positive and negative zero | |
903 if (jint_cast(_f) != jint_cast(t->getf())) return false; | |
904 } | |
905 return true; | |
906 } | |
907 return false; | |
908 } | |
909 | |
910 //------------------------------hash------------------------------------------- | |
911 // Type-specific hashing function. | |
912 int TypeF::hash(void) const { | |
913 return *(int*)(&_f); | |
914 } | |
915 | |
916 //------------------------------is_finite-------------------------------------- | |
917 // Has a finite value | |
918 bool TypeF::is_finite() const { | |
919 return g_isfinite(getf()) != 0; | |
920 } | |
921 | |
922 //------------------------------is_nan----------------------------------------- | |
923 // Is not a number (NaN) | |
924 bool TypeF::is_nan() const { | |
925 return g_isnan(getf()) != 0; | |
926 } | |
927 | |
928 //------------------------------dump2------------------------------------------ | |
929 // Dump float constant Type | |
930 #ifndef PRODUCT | |
931 void TypeF::dump2( Dict &d, uint depth, outputStream *st ) const { | |
932 Type::dump2(d,depth, st); | |
933 st->print("%f", _f); | |
934 } | |
935 #endif | |
936 | |
937 //------------------------------singleton-------------------------------------- | |
938 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
939 // constants (Ldi nodes). Singletons are integer, float or double constants | |
940 // or a single symbol. | |
941 bool TypeF::singleton(void) const { | |
942 return true; // Always a singleton | |
943 } | |
944 | |
945 bool TypeF::empty(void) const { | |
946 return false; // always exactly a singleton | |
947 } | |
948 | |
949 //============================================================================= | |
950 // Convenience common pre-built types. | |
951 const TypeD *TypeD::ZERO; // Floating point zero | |
952 const TypeD *TypeD::ONE; // Floating point one | |
953 | |
954 //------------------------------make------------------------------------------- | |
955 const TypeD *TypeD::make(double d) { | |
956 return (TypeD*)(new TypeD(d))->hashcons(); | |
957 } | |
958 | |
959 //------------------------------meet------------------------------------------- | |
960 // Compute the MEET of two types. It returns a new Type object. | |
961 const Type *TypeD::xmeet( const Type *t ) const { | |
962 // Perform a fast test for common case; meeting the same types together. | |
963 if( this == t ) return this; // Meeting same type-rep? | |
964 | |
965 // Current "this->_base" is DoubleCon | |
966 switch (t->base()) { // Switch on original type | |
967 case AnyPtr: // Mixing with oops happens when javac | |
968 case RawPtr: // reuses local variables | |
969 case OopPtr: | |
970 case InstPtr: | |
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971 case AryPtr: |
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972 case MetadataPtr: |
0 | 973 case KlassPtr: |
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974 case NarrowOop: |
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975 case NarrowKlass: |
0 | 976 case Int: |
977 case Long: | |
978 case FloatTop: | |
979 case FloatCon: | |
980 case FloatBot: | |
981 case Bottom: // Ye Olde Default | |
982 return Type::BOTTOM; | |
983 | |
984 case DoubleBot: | |
985 return t; | |
986 | |
987 default: // All else is a mistake | |
988 typerr(t); | |
989 | |
990 case DoubleCon: // Double-constant vs Double-constant? | |
991 if( jlong_cast(_d) != jlong_cast(t->getd()) ) // unequal constants? (see comment in TypeF::xmeet) | |
992 return DOUBLE; // Return generic double | |
993 case Top: | |
994 case DoubleTop: | |
995 break; | |
996 } | |
997 return this; // Return the double constant | |
998 } | |
999 | |
1000 //------------------------------xdual------------------------------------------ | |
1001 // Dual: symmetric | |
1002 const Type *TypeD::xdual() const { | |
1003 return this; | |
1004 } | |
1005 | |
1006 //------------------------------eq--------------------------------------------- | |
1007 // Structural equality check for Type representations | |
1008 bool TypeD::eq( const Type *t ) const { | |
1009 if( g_isnan(_d) || | |
1010 g_isnan(t->getd()) ) { | |
1011 // One or both are NANs. If both are NANs return true, else false. | |
1012 return (g_isnan(_d) && g_isnan(t->getd())); | |
1013 } | |
1014 if (_d == t->getd()) { | |
1015 // (NaN is impossible at this point, since it is not equal even to itself) | |
1016 if (_d == 0.0) { | |
1017 // difference between positive and negative zero | |
1018 if (jlong_cast(_d) != jlong_cast(t->getd())) return false; | |
1019 } | |
1020 return true; | |
1021 } | |
1022 return false; | |
1023 } | |
1024 | |
1025 //------------------------------hash------------------------------------------- | |
1026 // Type-specific hashing function. | |
1027 int TypeD::hash(void) const { | |
1028 return *(int*)(&_d); | |
1029 } | |
1030 | |
1031 //------------------------------is_finite-------------------------------------- | |
1032 // Has a finite value | |
1033 bool TypeD::is_finite() const { | |
1034 return g_isfinite(getd()) != 0; | |
1035 } | |
1036 | |
1037 //------------------------------is_nan----------------------------------------- | |
1038 // Is not a number (NaN) | |
1039 bool TypeD::is_nan() const { | |
1040 return g_isnan(getd()) != 0; | |
1041 } | |
1042 | |
1043 //------------------------------dump2------------------------------------------ | |
1044 // Dump double constant Type | |
1045 #ifndef PRODUCT | |
1046 void TypeD::dump2( Dict &d, uint depth, outputStream *st ) const { | |
1047 Type::dump2(d,depth,st); | |
1048 st->print("%f", _d); | |
1049 } | |
1050 #endif | |
1051 | |
1052 //------------------------------singleton-------------------------------------- | |
1053 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
1054 // constants (Ldi nodes). Singletons are integer, float or double constants | |
1055 // or a single symbol. | |
1056 bool TypeD::singleton(void) const { | |
1057 return true; // Always a singleton | |
1058 } | |
1059 | |
1060 bool TypeD::empty(void) const { | |
1061 return false; // always exactly a singleton | |
1062 } | |
1063 | |
1064 //============================================================================= | |
1065 // Convience common pre-built types. | |
1066 const TypeInt *TypeInt::MINUS_1;// -1 | |
1067 const TypeInt *TypeInt::ZERO; // 0 | |
1068 const TypeInt *TypeInt::ONE; // 1 | |
1069 const TypeInt *TypeInt::BOOL; // 0 or 1, FALSE or TRUE. | |
1070 const TypeInt *TypeInt::CC; // -1,0 or 1, condition codes | |
1071 const TypeInt *TypeInt::CC_LT; // [-1] == MINUS_1 | |
1072 const TypeInt *TypeInt::CC_GT; // [1] == ONE | |
1073 const TypeInt *TypeInt::CC_EQ; // [0] == ZERO | |
1074 const TypeInt *TypeInt::CC_LE; // [-1,0] | |
1075 const TypeInt *TypeInt::CC_GE; // [0,1] == BOOL (!) | |
1076 const TypeInt *TypeInt::BYTE; // Bytes, -128 to 127 | |
624 | 1077 const TypeInt *TypeInt::UBYTE; // Unsigned Bytes, 0 to 255 |
0 | 1078 const TypeInt *TypeInt::CHAR; // Java chars, 0-65535 |
1079 const TypeInt *TypeInt::SHORT; // Java shorts, -32768-32767 | |
1080 const TypeInt *TypeInt::POS; // Positive 32-bit integers or zero | |
1081 const TypeInt *TypeInt::POS1; // Positive 32-bit integers | |
1082 const TypeInt *TypeInt::INT; // 32-bit integers | |
1083 const TypeInt *TypeInt::SYMINT; // symmetric range [-max_jint..max_jint] | |
1084 | |
1085 //------------------------------TypeInt---------------------------------------- | |
1086 TypeInt::TypeInt( jint lo, jint hi, int w ) : Type(Int), _lo(lo), _hi(hi), _widen(w) { | |
1087 } | |
1088 | |
1089 //------------------------------make------------------------------------------- | |
1090 const TypeInt *TypeInt::make( jint lo ) { | |
1091 return (TypeInt*)(new TypeInt(lo,lo,WidenMin))->hashcons(); | |
1092 } | |
1093 | |
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1094 static int normalize_int_widen( jint lo, jint hi, int w ) { |
0 | 1095 // Certain normalizations keep us sane when comparing types. |
1096 // The 'SMALLINT' covers constants and also CC and its relatives. | |
1097 if (lo <= hi) { | |
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1098 if ((juint)(hi - lo) <= SMALLINT) w = Type::WidenMin; |
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1099 if ((juint)(hi - lo) >= max_juint) w = Type::WidenMax; // TypeInt::INT |
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1100 } else { |
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1101 if ((juint)(lo - hi) <= SMALLINT) w = Type::WidenMin; |
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1102 if ((juint)(lo - hi) >= max_juint) w = Type::WidenMin; // dual TypeInt::INT |
0 | 1103 } |
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1104 return w; |
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1105 } |
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1106 |
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1107 const TypeInt *TypeInt::make( jint lo, jint hi, int w ) { |
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1108 w = normalize_int_widen(lo, hi, w); |
0 | 1109 return (TypeInt*)(new TypeInt(lo,hi,w))->hashcons(); |
1110 } | |
1111 | |
1112 //------------------------------meet------------------------------------------- | |
1113 // Compute the MEET of two types. It returns a new Type representation object | |
1114 // with reference count equal to the number of Types pointing at it. | |
1115 // Caller should wrap a Types around it. | |
1116 const Type *TypeInt::xmeet( const Type *t ) const { | |
1117 // Perform a fast test for common case; meeting the same types together. | |
1118 if( this == t ) return this; // Meeting same type? | |
1119 | |
1120 // Currently "this->_base" is a TypeInt | |
1121 switch (t->base()) { // Switch on original type | |
1122 case AnyPtr: // Mixing with oops happens when javac | |
1123 case RawPtr: // reuses local variables | |
1124 case OopPtr: | |
1125 case InstPtr: | |
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1126 case AryPtr: |
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1127 case MetadataPtr: |
0 | 1128 case KlassPtr: |
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1129 case NarrowOop: |
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1130 case NarrowKlass: |
0 | 1131 case Long: |
1132 case FloatTop: | |
1133 case FloatCon: | |
1134 case FloatBot: | |
1135 case DoubleTop: | |
1136 case DoubleCon: | |
1137 case DoubleBot: | |
1138 case Bottom: // Ye Olde Default | |
1139 return Type::BOTTOM; | |
1140 default: // All else is a mistake | |
1141 typerr(t); | |
1142 case Top: // No change | |
1143 return this; | |
1144 case Int: // Int vs Int? | |
1145 break; | |
1146 } | |
1147 | |
1148 // Expand covered set | |
1149 const TypeInt *r = t->is_int(); | |
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1150 return make( MIN2(_lo,r->_lo), MAX2(_hi,r->_hi), MAX2(_widen,r->_widen) ); |
0 | 1151 } |
1152 | |
1153 //------------------------------xdual------------------------------------------ | |
1154 // Dual: reverse hi & lo; flip widen | |
1155 const Type *TypeInt::xdual() const { | |
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1156 int w = normalize_int_widen(_hi,_lo, WidenMax-_widen); |
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1157 return new TypeInt(_hi,_lo,w); |
0 | 1158 } |
1159 | |
1160 //------------------------------widen------------------------------------------ | |
1161 // Only happens for optimistic top-down optimizations. | |
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1162 const Type *TypeInt::widen( const Type *old, const Type* limit ) const { |
0 | 1163 // Coming from TOP or such; no widening |
1164 if( old->base() != Int ) return this; | |
1165 const TypeInt *ot = old->is_int(); | |
1166 | |
1167 // If new guy is equal to old guy, no widening | |
1168 if( _lo == ot->_lo && _hi == ot->_hi ) | |
1169 return old; | |
1170 | |
1171 // If new guy contains old, then we widened | |
1172 if( _lo <= ot->_lo && _hi >= ot->_hi ) { | |
1173 // New contains old | |
1174 // If new guy is already wider than old, no widening | |
1175 if( _widen > ot->_widen ) return this; | |
1176 // If old guy was a constant, do not bother | |
1177 if (ot->_lo == ot->_hi) return this; | |
1178 // Now widen new guy. | |
1179 // Check for widening too far | |
1180 if (_widen == WidenMax) { | |
1009
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1181 int max = max_jint; |
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1182 int min = min_jint; |
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1183 if (limit->isa_int()) { |
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1184 max = limit->is_int()->_hi; |
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1185 min = limit->is_int()->_lo; |
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1186 } |
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1187 if (min < _lo && _hi < max) { |
0 | 1188 // If neither endpoint is extremal yet, push out the endpoint |
1189 // which is closer to its respective limit. | |
1190 if (_lo >= 0 || // easy common case | |
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1191 (juint)(_lo - min) >= (juint)(max - _hi)) { |
0 | 1192 // Try to widen to an unsigned range type of 31 bits: |
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1193 return make(_lo, max, WidenMax); |
0 | 1194 } else { |
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1195 return make(min, _hi, WidenMax); |
0 | 1196 } |
1197 } | |
1198 return TypeInt::INT; | |
1199 } | |
1200 // Returned widened new guy | |
1201 return make(_lo,_hi,_widen+1); | |
1202 } | |
1203 | |
1204 // If old guy contains new, then we probably widened too far & dropped to | |
1205 // bottom. Return the wider fellow. | |
1206 if ( ot->_lo <= _lo && ot->_hi >= _hi ) | |
1207 return old; | |
1208 | |
1209 //fatal("Integer value range is not subset"); | |
1210 //return this; | |
1211 return TypeInt::INT; | |
1212 } | |
1213 | |
1214 //------------------------------narrow--------------------------------------- | |
1215 // Only happens for pessimistic optimizations. | |
1216 const Type *TypeInt::narrow( const Type *old ) const { | |
1217 if (_lo >= _hi) return this; // already narrow enough | |
1218 if (old == NULL) return this; | |
1219 const TypeInt* ot = old->isa_int(); | |
1220 if (ot == NULL) return this; | |
1221 jint olo = ot->_lo; | |
1222 jint ohi = ot->_hi; | |
1223 | |
1224 // If new guy is equal to old guy, no narrowing | |
1225 if (_lo == olo && _hi == ohi) return old; | |
1226 | |
1227 // If old guy was maximum range, allow the narrowing | |
1228 if (olo == min_jint && ohi == max_jint) return this; | |
1229 | |
1230 if (_lo < olo || _hi > ohi) | |
1231 return this; // doesn't narrow; pretty wierd | |
1232 | |
1233 // The new type narrows the old type, so look for a "death march". | |
1234 // See comments on PhaseTransform::saturate. | |
1235 juint nrange = _hi - _lo; | |
1236 juint orange = ohi - olo; | |
1237 if (nrange < max_juint - 1 && nrange > (orange >> 1) + (SMALLINT*2)) { | |
1238 // Use the new type only if the range shrinks a lot. | |
1239 // We do not want the optimizer computing 2^31 point by point. | |
1240 return old; | |
1241 } | |
1242 | |
1243 return this; | |
1244 } | |
1245 | |
1246 //-----------------------------filter------------------------------------------ | |
1247 const Type *TypeInt::filter( const Type *kills ) const { | |
1248 const TypeInt* ft = join(kills)->isa_int(); | |
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1249 if (ft == NULL || ft->empty()) |
0 | 1250 return Type::TOP; // Canonical empty value |
1251 if (ft->_widen < this->_widen) { | |
1252 // Do not allow the value of kill->_widen to affect the outcome. | |
1253 // The widen bits must be allowed to run freely through the graph. | |
1254 ft = TypeInt::make(ft->_lo, ft->_hi, this->_widen); | |
1255 } | |
1256 return ft; | |
1257 } | |
1258 | |
1259 //------------------------------eq--------------------------------------------- | |
1260 // Structural equality check for Type representations | |
1261 bool TypeInt::eq( const Type *t ) const { | |
1262 const TypeInt *r = t->is_int(); // Handy access | |
1263 return r->_lo == _lo && r->_hi == _hi && r->_widen == _widen; | |
1264 } | |
1265 | |
1266 //------------------------------hash------------------------------------------- | |
1267 // Type-specific hashing function. | |
1268 int TypeInt::hash(void) const { | |
1269 return _lo+_hi+_widen+(int)Type::Int; | |
1270 } | |
1271 | |
1272 //------------------------------is_finite-------------------------------------- | |
1273 // Has a finite value | |
1274 bool TypeInt::is_finite() const { | |
1275 return true; | |
1276 } | |
1277 | |
1278 //------------------------------dump2------------------------------------------ | |
1279 // Dump TypeInt | |
1280 #ifndef PRODUCT | |
1281 static const char* intname(char* buf, jint n) { | |
1282 if (n == min_jint) | |
1283 return "min"; | |
1284 else if (n < min_jint + 10000) | |
1285 sprintf(buf, "min+" INT32_FORMAT, n - min_jint); | |
1286 else if (n == max_jint) | |
1287 return "max"; | |
1288 else if (n > max_jint - 10000) | |
1289 sprintf(buf, "max-" INT32_FORMAT, max_jint - n); | |
1290 else | |
1291 sprintf(buf, INT32_FORMAT, n); | |
1292 return buf; | |
1293 } | |
1294 | |
1295 void TypeInt::dump2( Dict &d, uint depth, outputStream *st ) const { | |
1296 char buf[40], buf2[40]; | |
1297 if (_lo == min_jint && _hi == max_jint) | |
1298 st->print("int"); | |
1299 else if (is_con()) | |
1300 st->print("int:%s", intname(buf, get_con())); | |
1301 else if (_lo == BOOL->_lo && _hi == BOOL->_hi) | |
1302 st->print("bool"); | |
1303 else if (_lo == BYTE->_lo && _hi == BYTE->_hi) | |
1304 st->print("byte"); | |
1305 else if (_lo == CHAR->_lo && _hi == CHAR->_hi) | |
1306 st->print("char"); | |
1307 else if (_lo == SHORT->_lo && _hi == SHORT->_hi) | |
1308 st->print("short"); | |
1309 else if (_hi == max_jint) | |
1310 st->print("int:>=%s", intname(buf, _lo)); | |
1311 else if (_lo == min_jint) | |
1312 st->print("int:<=%s", intname(buf, _hi)); | |
1313 else | |
1314 st->print("int:%s..%s", intname(buf, _lo), intname(buf2, _hi)); | |
1315 | |
1316 if (_widen != 0 && this != TypeInt::INT) | |
1317 st->print(":%.*s", _widen, "wwww"); | |
1318 } | |
1319 #endif | |
1320 | |
1321 //------------------------------singleton-------------------------------------- | |
1322 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
1323 // constants. | |
1324 bool TypeInt::singleton(void) const { | |
1325 return _lo >= _hi; | |
1326 } | |
1327 | |
1328 bool TypeInt::empty(void) const { | |
1329 return _lo > _hi; | |
1330 } | |
1331 | |
1332 //============================================================================= | |
1333 // Convenience common pre-built types. | |
1334 const TypeLong *TypeLong::MINUS_1;// -1 | |
1335 const TypeLong *TypeLong::ZERO; // 0 | |
1336 const TypeLong *TypeLong::ONE; // 1 | |
1337 const TypeLong *TypeLong::POS; // >=0 | |
1338 const TypeLong *TypeLong::LONG; // 64-bit integers | |
1339 const TypeLong *TypeLong::INT; // 32-bit subrange | |
1340 const TypeLong *TypeLong::UINT; // 32-bit unsigned subrange | |
1341 | |
1342 //------------------------------TypeLong--------------------------------------- | |
1343 TypeLong::TypeLong( jlong lo, jlong hi, int w ) : Type(Long), _lo(lo), _hi(hi), _widen(w) { | |
1344 } | |
1345 | |
1346 //------------------------------make------------------------------------------- | |
1347 const TypeLong *TypeLong::make( jlong lo ) { | |
1348 return (TypeLong*)(new TypeLong(lo,lo,WidenMin))->hashcons(); | |
1349 } | |
1350 | |
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1351 static int normalize_long_widen( jlong lo, jlong hi, int w ) { |
0 | 1352 // Certain normalizations keep us sane when comparing types. |
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1353 // The 'SMALLINT' covers constants. |
0 | 1354 if (lo <= hi) { |
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1355 if ((julong)(hi - lo) <= SMALLINT) w = Type::WidenMin; |
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1356 if ((julong)(hi - lo) >= max_julong) w = Type::WidenMax; // TypeLong::LONG |
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1357 } else { |
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1358 if ((julong)(lo - hi) <= SMALLINT) w = Type::WidenMin; |
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1359 if ((julong)(lo - hi) >= max_julong) w = Type::WidenMin; // dual TypeLong::LONG |
0 | 1360 } |
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1361 return w; |
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1362 } |
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1363 |
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1364 const TypeLong *TypeLong::make( jlong lo, jlong hi, int w ) { |
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1365 w = normalize_long_widen(lo, hi, w); |
0 | 1366 return (TypeLong*)(new TypeLong(lo,hi,w))->hashcons(); |
1367 } | |
1368 | |
1369 | |
1370 //------------------------------meet------------------------------------------- | |
1371 // Compute the MEET of two types. It returns a new Type representation object | |
1372 // with reference count equal to the number of Types pointing at it. | |
1373 // Caller should wrap a Types around it. | |
1374 const Type *TypeLong::xmeet( const Type *t ) const { | |
1375 // Perform a fast test for common case; meeting the same types together. | |
1376 if( this == t ) return this; // Meeting same type? | |
1377 | |
1378 // Currently "this->_base" is a TypeLong | |
1379 switch (t->base()) { // Switch on original type | |
1380 case AnyPtr: // Mixing with oops happens when javac | |
1381 case RawPtr: // reuses local variables | |
1382 case OopPtr: | |
1383 case InstPtr: | |
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1384 case AryPtr: |
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1385 case MetadataPtr: |
0 | 1386 case KlassPtr: |
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1387 case NarrowOop: |
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1388 case NarrowKlass: |
0 | 1389 case Int: |
1390 case FloatTop: | |
1391 case FloatCon: | |
1392 case FloatBot: | |
1393 case DoubleTop: | |
1394 case DoubleCon: | |
1395 case DoubleBot: | |
1396 case Bottom: // Ye Olde Default | |
1397 return Type::BOTTOM; | |
1398 default: // All else is a mistake | |
1399 typerr(t); | |
1400 case Top: // No change | |
1401 return this; | |
1402 case Long: // Long vs Long? | |
1403 break; | |
1404 } | |
1405 | |
1406 // Expand covered set | |
1407 const TypeLong *r = t->is_long(); // Turn into a TypeLong | |
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1408 return make( MIN2(_lo,r->_lo), MAX2(_hi,r->_hi), MAX2(_widen,r->_widen) ); |
0 | 1409 } |
1410 | |
1411 //------------------------------xdual------------------------------------------ | |
1412 // Dual: reverse hi & lo; flip widen | |
1413 const Type *TypeLong::xdual() const { | |
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1414 int w = normalize_long_widen(_hi,_lo, WidenMax-_widen); |
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1415 return new TypeLong(_hi,_lo,w); |
0 | 1416 } |
1417 | |
1418 //------------------------------widen------------------------------------------ | |
1419 // Only happens for optimistic top-down optimizations. | |
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1420 const Type *TypeLong::widen( const Type *old, const Type* limit ) const { |
0 | 1421 // Coming from TOP or such; no widening |
1422 if( old->base() != Long ) return this; | |
1423 const TypeLong *ot = old->is_long(); | |
1424 | |
1425 // If new guy is equal to old guy, no widening | |
1426 if( _lo == ot->_lo && _hi == ot->_hi ) | |
1427 return old; | |
1428 | |
1429 // If new guy contains old, then we widened | |
1430 if( _lo <= ot->_lo && _hi >= ot->_hi ) { | |
1431 // New contains old | |
1432 // If new guy is already wider than old, no widening | |
1433 if( _widen > ot->_widen ) return this; | |
1434 // If old guy was a constant, do not bother | |
1435 if (ot->_lo == ot->_hi) return this; | |
1436 // Now widen new guy. | |
1437 // Check for widening too far | |
1438 if (_widen == WidenMax) { | |
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1439 jlong max = max_jlong; |
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1440 jlong min = min_jlong; |
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1441 if (limit->isa_long()) { |
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1442 max = limit->is_long()->_hi; |
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1443 min = limit->is_long()->_lo; |
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1444 } |
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1445 if (min < _lo && _hi < max) { |
0 | 1446 // If neither endpoint is extremal yet, push out the endpoint |
1447 // which is closer to its respective limit. | |
1448 if (_lo >= 0 || // easy common case | |
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1449 (julong)(_lo - min) >= (julong)(max - _hi)) { |
0 | 1450 // Try to widen to an unsigned range type of 32/63 bits: |
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1451 if (max >= max_juint && _hi < max_juint) |
0 | 1452 return make(_lo, max_juint, WidenMax); |
1453 else | |
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1454 return make(_lo, max, WidenMax); |
0 | 1455 } else { |
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1456 return make(min, _hi, WidenMax); |
0 | 1457 } |
1458 } | |
1459 return TypeLong::LONG; | |
1460 } | |
1461 // Returned widened new guy | |
1462 return make(_lo,_hi,_widen+1); | |
1463 } | |
1464 | |
1465 // If old guy contains new, then we probably widened too far & dropped to | |
1466 // bottom. Return the wider fellow. | |
1467 if ( ot->_lo <= _lo && ot->_hi >= _hi ) | |
1468 return old; | |
1469 | |
1470 // fatal("Long value range is not subset"); | |
1471 // return this; | |
1472 return TypeLong::LONG; | |
1473 } | |
1474 | |
1475 //------------------------------narrow---------------------------------------- | |
1476 // Only happens for pessimistic optimizations. | |
1477 const Type *TypeLong::narrow( const Type *old ) const { | |
1478 if (_lo >= _hi) return this; // already narrow enough | |
1479 if (old == NULL) return this; | |
1480 const TypeLong* ot = old->isa_long(); | |
1481 if (ot == NULL) return this; | |
1482 jlong olo = ot->_lo; | |
1483 jlong ohi = ot->_hi; | |
1484 | |
1485 // If new guy is equal to old guy, no narrowing | |
1486 if (_lo == olo && _hi == ohi) return old; | |
1487 | |
1488 // If old guy was maximum range, allow the narrowing | |
1489 if (olo == min_jlong && ohi == max_jlong) return this; | |
1490 | |
1491 if (_lo < olo || _hi > ohi) | |
1492 return this; // doesn't narrow; pretty wierd | |
1493 | |
1494 // The new type narrows the old type, so look for a "death march". | |
1495 // See comments on PhaseTransform::saturate. | |
1496 julong nrange = _hi - _lo; | |
1497 julong orange = ohi - olo; | |
1498 if (nrange < max_julong - 1 && nrange > (orange >> 1) + (SMALLINT*2)) { | |
1499 // Use the new type only if the range shrinks a lot. | |
1500 // We do not want the optimizer computing 2^31 point by point. | |
1501 return old; | |
1502 } | |
1503 | |
1504 return this; | |
1505 } | |
1506 | |
1507 //-----------------------------filter------------------------------------------ | |
1508 const Type *TypeLong::filter( const Type *kills ) const { | |
1509 const TypeLong* ft = join(kills)->isa_long(); | |
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1510 if (ft == NULL || ft->empty()) |
0 | 1511 return Type::TOP; // Canonical empty value |
1512 if (ft->_widen < this->_widen) { | |
1513 // Do not allow the value of kill->_widen to affect the outcome. | |
1514 // The widen bits must be allowed to run freely through the graph. | |
1515 ft = TypeLong::make(ft->_lo, ft->_hi, this->_widen); | |
1516 } | |
1517 return ft; | |
1518 } | |
1519 | |
1520 //------------------------------eq--------------------------------------------- | |
1521 // Structural equality check for Type representations | |
1522 bool TypeLong::eq( const Type *t ) const { | |
1523 const TypeLong *r = t->is_long(); // Handy access | |
1524 return r->_lo == _lo && r->_hi == _hi && r->_widen == _widen; | |
1525 } | |
1526 | |
1527 //------------------------------hash------------------------------------------- | |
1528 // Type-specific hashing function. | |
1529 int TypeLong::hash(void) const { | |
1530 return (int)(_lo+_hi+_widen+(int)Type::Long); | |
1531 } | |
1532 | |
1533 //------------------------------is_finite-------------------------------------- | |
1534 // Has a finite value | |
1535 bool TypeLong::is_finite() const { | |
1536 return true; | |
1537 } | |
1538 | |
1539 //------------------------------dump2------------------------------------------ | |
1540 // Dump TypeLong | |
1541 #ifndef PRODUCT | |
1542 static const char* longnamenear(jlong x, const char* xname, char* buf, jlong n) { | |
1543 if (n > x) { | |
1544 if (n >= x + 10000) return NULL; | |
1545 sprintf(buf, "%s+" INT64_FORMAT, xname, n - x); | |
1546 } else if (n < x) { | |
1547 if (n <= x - 10000) return NULL; | |
1548 sprintf(buf, "%s-" INT64_FORMAT, xname, x - n); | |
1549 } else { | |
1550 return xname; | |
1551 } | |
1552 return buf; | |
1553 } | |
1554 | |
1555 static const char* longname(char* buf, jlong n) { | |
1556 const char* str; | |
1557 if (n == min_jlong) | |
1558 return "min"; | |
1559 else if (n < min_jlong + 10000) | |
1560 sprintf(buf, "min+" INT64_FORMAT, n - min_jlong); | |
1561 else if (n == max_jlong) | |
1562 return "max"; | |
1563 else if (n > max_jlong - 10000) | |
1564 sprintf(buf, "max-" INT64_FORMAT, max_jlong - n); | |
1565 else if ((str = longnamenear(max_juint, "maxuint", buf, n)) != NULL) | |
1566 return str; | |
1567 else if ((str = longnamenear(max_jint, "maxint", buf, n)) != NULL) | |
1568 return str; | |
1569 else if ((str = longnamenear(min_jint, "minint", buf, n)) != NULL) | |
1570 return str; | |
1571 else | |
1572 sprintf(buf, INT64_FORMAT, n); | |
1573 return buf; | |
1574 } | |
1575 | |
1576 void TypeLong::dump2( Dict &d, uint depth, outputStream *st ) const { | |
1577 char buf[80], buf2[80]; | |
1578 if (_lo == min_jlong && _hi == max_jlong) | |
1579 st->print("long"); | |
1580 else if (is_con()) | |
1581 st->print("long:%s", longname(buf, get_con())); | |
1582 else if (_hi == max_jlong) | |
1583 st->print("long:>=%s", longname(buf, _lo)); | |
1584 else if (_lo == min_jlong) | |
1585 st->print("long:<=%s", longname(buf, _hi)); | |
1586 else | |
1587 st->print("long:%s..%s", longname(buf, _lo), longname(buf2, _hi)); | |
1588 | |
1589 if (_widen != 0 && this != TypeLong::LONG) | |
1590 st->print(":%.*s", _widen, "wwww"); | |
1591 } | |
1592 #endif | |
1593 | |
1594 //------------------------------singleton-------------------------------------- | |
1595 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
1596 // constants | |
1597 bool TypeLong::singleton(void) const { | |
1598 return _lo >= _hi; | |
1599 } | |
1600 | |
1601 bool TypeLong::empty(void) const { | |
1602 return _lo > _hi; | |
1603 } | |
1604 | |
1605 //============================================================================= | |
1606 // Convenience common pre-built types. | |
1607 const TypeTuple *TypeTuple::IFBOTH; // Return both arms of IF as reachable | |
1608 const TypeTuple *TypeTuple::IFFALSE; | |
1609 const TypeTuple *TypeTuple::IFTRUE; | |
1610 const TypeTuple *TypeTuple::IFNEITHER; | |
1611 const TypeTuple *TypeTuple::LOOPBODY; | |
1612 const TypeTuple *TypeTuple::MEMBAR; | |
1613 const TypeTuple *TypeTuple::STORECONDITIONAL; | |
1614 const TypeTuple *TypeTuple::START_I2C; | |
1615 const TypeTuple *TypeTuple::INT_PAIR; | |
1616 const TypeTuple *TypeTuple::LONG_PAIR; | |
1617 | |
1618 | |
1619 //------------------------------make------------------------------------------- | |
1620 // Make a TypeTuple from the range of a method signature | |
1621 const TypeTuple *TypeTuple::make_range(ciSignature* sig) { | |
1622 ciType* return_type = sig->return_type(); | |
1623 uint total_fields = TypeFunc::Parms + return_type->size(); | |
1624 const Type **field_array = fields(total_fields); | |
1625 switch (return_type->basic_type()) { | |
1626 case T_LONG: | |
1627 field_array[TypeFunc::Parms] = TypeLong::LONG; | |
1628 field_array[TypeFunc::Parms+1] = Type::HALF; | |
1629 break; | |
1630 case T_DOUBLE: | |
1631 field_array[TypeFunc::Parms] = Type::DOUBLE; | |
1632 field_array[TypeFunc::Parms+1] = Type::HALF; | |
1633 break; | |
1634 case T_OBJECT: | |
1635 case T_ARRAY: | |
1636 case T_BOOLEAN: | |
1637 case T_CHAR: | |
1638 case T_FLOAT: | |
1639 case T_BYTE: | |
1640 case T_SHORT: | |
1641 case T_INT: | |
1642 field_array[TypeFunc::Parms] = get_const_type(return_type); | |
1643 break; | |
1644 case T_VOID: | |
1645 break; | |
1646 default: | |
1647 ShouldNotReachHere(); | |
1648 } | |
1649 return (TypeTuple*)(new TypeTuple(total_fields,field_array))->hashcons(); | |
1650 } | |
1651 | |
1652 // Make a TypeTuple from the domain of a method signature | |
1653 const TypeTuple *TypeTuple::make_domain(ciInstanceKlass* recv, ciSignature* sig) { | |
1654 uint total_fields = TypeFunc::Parms + sig->size(); | |
1655 | |
1656 uint pos = TypeFunc::Parms; | |
1657 const Type **field_array; | |
1658 if (recv != NULL) { | |
1659 total_fields++; | |
1660 field_array = fields(total_fields); | |
1661 // Use get_const_type here because it respects UseUniqueSubclasses: | |
1662 field_array[pos++] = get_const_type(recv)->join(TypePtr::NOTNULL); | |
1663 } else { | |
1664 field_array = fields(total_fields); | |
1665 } | |
1666 | |
1667 int i = 0; | |
1668 while (pos < total_fields) { | |
1669 ciType* type = sig->type_at(i); | |
1670 | |
1671 switch (type->basic_type()) { | |
1672 case T_LONG: | |
1673 field_array[pos++] = TypeLong::LONG; | |
1674 field_array[pos++] = Type::HALF; | |
1675 break; | |
1676 case T_DOUBLE: | |
1677 field_array[pos++] = Type::DOUBLE; | |
1678 field_array[pos++] = Type::HALF; | |
1679 break; | |
1680 case T_OBJECT: | |
1681 case T_ARRAY: | |
1682 case T_BOOLEAN: | |
1683 case T_CHAR: | |
1684 case T_FLOAT: | |
1685 case T_BYTE: | |
1686 case T_SHORT: | |
1687 case T_INT: | |
1688 field_array[pos++] = get_const_type(type); | |
1689 break; | |
1690 default: | |
1691 ShouldNotReachHere(); | |
1692 } | |
1693 i++; | |
1694 } | |
1695 return (TypeTuple*)(new TypeTuple(total_fields,field_array))->hashcons(); | |
1696 } | |
1697 | |
1698 const TypeTuple *TypeTuple::make( uint cnt, const Type **fields ) { | |
1699 return (TypeTuple*)(new TypeTuple(cnt,fields))->hashcons(); | |
1700 } | |
1701 | |
1702 //------------------------------fields----------------------------------------- | |
1703 // Subroutine call type with space allocated for argument types | |
1704 const Type **TypeTuple::fields( uint arg_cnt ) { | |
1705 const Type **flds = (const Type **)(Compile::current()->type_arena()->Amalloc_4((TypeFunc::Parms+arg_cnt)*sizeof(Type*) )); | |
1706 flds[TypeFunc::Control ] = Type::CONTROL; | |
1707 flds[TypeFunc::I_O ] = Type::ABIO; | |
1708 flds[TypeFunc::Memory ] = Type::MEMORY; | |
1709 flds[TypeFunc::FramePtr ] = TypeRawPtr::BOTTOM; | |
1710 flds[TypeFunc::ReturnAdr] = Type::RETURN_ADDRESS; | |
1711 | |
1712 return flds; | |
1713 } | |
1714 | |
1715 //------------------------------meet------------------------------------------- | |
1716 // Compute the MEET of two types. It returns a new Type object. | |
1717 const Type *TypeTuple::xmeet( const Type *t ) const { | |
1718 // Perform a fast test for common case; meeting the same types together. | |
1719 if( this == t ) return this; // Meeting same type-rep? | |
1720 | |
1721 // Current "this->_base" is Tuple | |
1722 switch (t->base()) { // switch on original type | |
1723 | |
1724 case Bottom: // Ye Olde Default | |
1725 return t; | |
1726 | |
1727 default: // All else is a mistake | |
1728 typerr(t); | |
1729 | |
1730 case Tuple: { // Meeting 2 signatures? | |
1731 const TypeTuple *x = t->is_tuple(); | |
1732 assert( _cnt == x->_cnt, "" ); | |
1733 const Type **fields = (const Type **)(Compile::current()->type_arena()->Amalloc_4( _cnt*sizeof(Type*) )); | |
1734 for( uint i=0; i<_cnt; i++ ) | |
1735 fields[i] = field_at(i)->xmeet( x->field_at(i) ); | |
1736 return TypeTuple::make(_cnt,fields); | |
1737 } | |
1738 case Top: | |
1739 break; | |
1740 } | |
1741 return this; // Return the double constant | |
1742 } | |
1743 | |
1744 //------------------------------xdual------------------------------------------ | |
1745 // Dual: compute field-by-field dual | |
1746 const Type *TypeTuple::xdual() const { | |
1747 const Type **fields = (const Type **)(Compile::current()->type_arena()->Amalloc_4( _cnt*sizeof(Type*) )); | |
1748 for( uint i=0; i<_cnt; i++ ) | |
1749 fields[i] = _fields[i]->dual(); | |
1750 return new TypeTuple(_cnt,fields); | |
1751 } | |
1752 | |
1753 //------------------------------eq--------------------------------------------- | |
1754 // Structural equality check for Type representations | |
1755 bool TypeTuple::eq( const Type *t ) const { | |
1756 const TypeTuple *s = (const TypeTuple *)t; | |
1757 if (_cnt != s->_cnt) return false; // Unequal field counts | |
1758 for (uint i = 0; i < _cnt; i++) | |
1759 if (field_at(i) != s->field_at(i)) // POINTER COMPARE! NO RECURSION! | |
1760 return false; // Missed | |
1761 return true; | |
1762 } | |
1763 | |
1764 //------------------------------hash------------------------------------------- | |
1765 // Type-specific hashing function. | |
1766 int TypeTuple::hash(void) const { | |
1767 intptr_t sum = _cnt; | |
1768 for( uint i=0; i<_cnt; i++ ) | |
1769 sum += (intptr_t)_fields[i]; // Hash on pointers directly | |
1770 return sum; | |
1771 } | |
1772 | |
1773 //------------------------------dump2------------------------------------------ | |
1774 // Dump signature Type | |
1775 #ifndef PRODUCT | |
1776 void TypeTuple::dump2( Dict &d, uint depth, outputStream *st ) const { | |
1777 st->print("{"); | |
1778 if( !depth || d[this] ) { // Check for recursive print | |
1779 st->print("...}"); | |
1780 return; | |
1781 } | |
1782 d.Insert((void*)this, (void*)this); // Stop recursion | |
1783 if( _cnt ) { | |
1784 uint i; | |
1785 for( i=0; i<_cnt-1; i++ ) { | |
1786 st->print("%d:", i); | |
1787 _fields[i]->dump2(d, depth-1, st); | |
1788 st->print(", "); | |
1789 } | |
1790 st->print("%d:", i); | |
1791 _fields[i]->dump2(d, depth-1, st); | |
1792 } | |
1793 st->print("}"); | |
1794 } | |
1795 #endif | |
1796 | |
1797 //------------------------------singleton-------------------------------------- | |
1798 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
1799 // constants (Ldi nodes). Singletons are integer, float or double constants | |
1800 // or a single symbol. | |
1801 bool TypeTuple::singleton(void) const { | |
1802 return false; // Never a singleton | |
1803 } | |
1804 | |
1805 bool TypeTuple::empty(void) const { | |
1806 for( uint i=0; i<_cnt; i++ ) { | |
1807 if (_fields[i]->empty()) return true; | |
1808 } | |
1809 return false; | |
1810 } | |
1811 | |
1812 //============================================================================= | |
1813 // Convenience common pre-built types. | |
1814 | |
1815 inline const TypeInt* normalize_array_size(const TypeInt* size) { | |
1816 // Certain normalizations keep us sane when comparing types. | |
1817 // We do not want arrayOop variables to differ only by the wideness | |
1818 // of their index types. Pick minimum wideness, since that is the | |
1819 // forced wideness of small ranges anyway. | |
1820 if (size->_widen != Type::WidenMin) | |
1821 return TypeInt::make(size->_lo, size->_hi, Type::WidenMin); | |
1822 else | |
1823 return size; | |
1824 } | |
1825 | |
1826 //------------------------------make------------------------------------------- | |
1827 const TypeAry *TypeAry::make( const Type *elem, const TypeInt *size) { | |
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1828 if (UseCompressedOops && elem->isa_oopptr()) { |
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1829 elem = elem->make_narrowoop(); |
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1830 } |
0 | 1831 size = normalize_array_size(size); |
1832 return (TypeAry*)(new TypeAry(elem,size))->hashcons(); | |
1833 } | |
1834 | |
1835 //------------------------------meet------------------------------------------- | |
1836 // Compute the MEET of two types. It returns a new Type object. | |
1837 const Type *TypeAry::xmeet( const Type *t ) const { | |
1838 // Perform a fast test for common case; meeting the same types together. | |
1839 if( this == t ) return this; // Meeting same type-rep? | |
1840 | |
1841 // Current "this->_base" is Ary | |
1842 switch (t->base()) { // switch on original type | |
1843 | |
1844 case Bottom: // Ye Olde Default | |
1845 return t; | |
1846 | |
1847 default: // All else is a mistake | |
1848 typerr(t); | |
1849 | |
1850 case Array: { // Meeting 2 arrays? | |
1851 const TypeAry *a = t->is_ary(); | |
1852 return TypeAry::make(_elem->meet(a->_elem), | |
1853 _size->xmeet(a->_size)->is_int()); | |
1854 } | |
1855 case Top: | |
1856 break; | |
1857 } | |
1858 return this; // Return the double constant | |
1859 } | |
1860 | |
1861 //------------------------------xdual------------------------------------------ | |
1862 // Dual: compute field-by-field dual | |
1863 const Type *TypeAry::xdual() const { | |
1864 const TypeInt* size_dual = _size->dual()->is_int(); | |
1865 size_dual = normalize_array_size(size_dual); | |
1866 return new TypeAry( _elem->dual(), size_dual); | |
1867 } | |
1868 | |
1869 //------------------------------eq--------------------------------------------- | |
1870 // Structural equality check for Type representations | |
1871 bool TypeAry::eq( const Type *t ) const { | |
1872 const TypeAry *a = (const TypeAry*)t; | |
1873 return _elem == a->_elem && | |
1874 _size == a->_size; | |
1875 } | |
1876 | |
1877 //------------------------------hash------------------------------------------- | |
1878 // Type-specific hashing function. | |
1879 int TypeAry::hash(void) const { | |
1880 return (intptr_t)_elem + (intptr_t)_size; | |
1881 } | |
1882 | |
820
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1883 //----------------------interface_vs_oop--------------------------------------- |
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1884 #ifdef ASSERT |
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1885 bool TypeAry::interface_vs_oop(const Type *t) const { |
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1886 const TypeAry* t_ary = t->is_ary(); |
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1887 if (t_ary) { |
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1888 return _elem->interface_vs_oop(t_ary->_elem); |
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1889 } |
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1890 return false; |
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1891 } |
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1892 #endif |
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1893 |
0 | 1894 //------------------------------dump2------------------------------------------ |
1895 #ifndef PRODUCT | |
1896 void TypeAry::dump2( Dict &d, uint depth, outputStream *st ) const { | |
1897 _elem->dump2(d, depth, st); | |
1898 st->print("["); | |
1899 _size->dump2(d, depth, st); | |
1900 st->print("]"); | |
1901 } | |
1902 #endif | |
1903 | |
1904 //------------------------------singleton-------------------------------------- | |
1905 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
1906 // constants (Ldi nodes). Singletons are integer, float or double constants | |
1907 // or a single symbol. | |
1908 bool TypeAry::singleton(void) const { | |
1909 return false; // Never a singleton | |
1910 } | |
1911 | |
1912 bool TypeAry::empty(void) const { | |
1913 return _elem->empty() || _size->empty(); | |
1914 } | |
1915 | |
1916 //--------------------------ary_must_be_exact---------------------------------- | |
1917 bool TypeAry::ary_must_be_exact() const { | |
1918 if (!UseExactTypes) return false; | |
1919 // This logic looks at the element type of an array, and returns true | |
1920 // if the element type is either a primitive or a final instance class. | |
1921 // In such cases, an array built on this ary must have no subclasses. | |
1922 if (_elem == BOTTOM) return false; // general array not exact | |
1923 if (_elem == TOP ) return false; // inverted general array not exact | |
113
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1924 const TypeOopPtr* toop = NULL; |
221
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1925 if (UseCompressedOops && _elem->isa_narrowoop()) { |
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1926 toop = _elem->make_ptr()->isa_oopptr(); |
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1927 } else { |
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1928 toop = _elem->isa_oopptr(); |
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1929 } |
0 | 1930 if (!toop) return true; // a primitive type, like int |
1931 ciKlass* tklass = toop->klass(); | |
1932 if (tklass == NULL) return false; // unloaded class | |
1933 if (!tklass->is_loaded()) return false; // unloaded class | |
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1934 const TypeInstPtr* tinst; |
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1935 if (_elem->isa_narrowoop()) |
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1936 tinst = _elem->make_ptr()->isa_instptr(); |
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1937 else |
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1938 tinst = _elem->isa_instptr(); |
221
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1939 if (tinst) |
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1940 return tklass->as_instance_klass()->is_final(); |
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1941 const TypeAryPtr* tap; |
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1942 if (_elem->isa_narrowoop()) |
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1943 tap = _elem->make_ptr()->isa_aryptr(); |
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1944 else |
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1945 tap = _elem->isa_aryptr(); |
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1946 if (tap) |
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1947 return tap->ary()->ary_must_be_exact(); |
0 | 1948 return false; |
1949 } | |
1950 | |
6179
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1951 //==============================TypeVect======================================= |
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1952 // Convenience common pre-built types. |
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1953 const TypeVect *TypeVect::VECTS = NULL; // 32-bit vectors |
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1954 const TypeVect *TypeVect::VECTD = NULL; // 64-bit vectors |
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1955 const TypeVect *TypeVect::VECTX = NULL; // 128-bit vectors |
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1956 const TypeVect *TypeVect::VECTY = NULL; // 256-bit vectors |
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1957 |
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1958 //------------------------------make------------------------------------------- |
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1959 const TypeVect* TypeVect::make(const Type *elem, uint length) { |
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1960 BasicType elem_bt = elem->array_element_basic_type(); |
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1961 assert(is_java_primitive(elem_bt), "only primitive types in vector"); |
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1962 assert(length > 1 && is_power_of_2(length), "vector length is power of 2"); |
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1963 assert(Matcher::vector_size_supported(elem_bt, length), "length in range"); |
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1964 int size = length * type2aelembytes(elem_bt); |
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1965 switch (Matcher::vector_ideal_reg(size)) { |
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1966 case Op_VecS: |
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1967 return (TypeVect*)(new TypeVectS(elem, length))->hashcons(); |
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1968 case Op_VecD: |
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1969 case Op_RegD: |
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1970 return (TypeVect*)(new TypeVectD(elem, length))->hashcons(); |
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1971 case Op_VecX: |
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1972 return (TypeVect*)(new TypeVectX(elem, length))->hashcons(); |
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1973 case Op_VecY: |
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1974 return (TypeVect*)(new TypeVectY(elem, length))->hashcons(); |
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1975 } |
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1976 ShouldNotReachHere(); |
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1977 return NULL; |
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1978 } |
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1979 |
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1980 //------------------------------meet------------------------------------------- |
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1981 // Compute the MEET of two types. It returns a new Type object. |
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1982 const Type *TypeVect::xmeet( const Type *t ) const { |
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1983 // Perform a fast test for common case; meeting the same types together. |
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1984 if( this == t ) return this; // Meeting same type-rep? |
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1985 |
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1986 // Current "this->_base" is Vector |
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1987 switch (t->base()) { // switch on original type |
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1988 |
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1989 case Bottom: // Ye Olde Default |
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1990 return t; |
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1991 |
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1992 default: // All else is a mistake |
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1993 typerr(t); |
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1994 |
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1995 case VectorS: |
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1996 case VectorD: |
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1997 case VectorX: |
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1998 case VectorY: { // Meeting 2 vectors? |
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1999 const TypeVect* v = t->is_vect(); |
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2000 assert( base() == v->base(), ""); |
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2001 assert(length() == v->length(), ""); |
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2002 assert(element_basic_type() == v->element_basic_type(), ""); |
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2003 return TypeVect::make(_elem->xmeet(v->_elem), _length); |
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2004 } |
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2005 case Top: |
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2006 break; |
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2007 } |
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2008 return this; |
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2009 } |
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2010 |
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2011 //------------------------------xdual------------------------------------------ |
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2012 // Dual: compute field-by-field dual |
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2013 const Type *TypeVect::xdual() const { |
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2014 return new TypeVect(base(), _elem->dual(), _length); |
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2015 } |
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2016 |
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2017 //------------------------------eq--------------------------------------------- |
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2018 // Structural equality check for Type representations |
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2019 bool TypeVect::eq(const Type *t) const { |
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2020 const TypeVect *v = t->is_vect(); |
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2021 return (_elem == v->_elem) && (_length == v->_length); |
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2022 } |
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2023 |
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2024 //------------------------------hash------------------------------------------- |
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2025 // Type-specific hashing function. |
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2026 int TypeVect::hash(void) const { |
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2027 return (intptr_t)_elem + (intptr_t)_length; |
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2028 } |
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2029 |
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2030 //------------------------------singleton-------------------------------------- |
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2031 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple |
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2032 // constants (Ldi nodes). Vector is singleton if all elements are the same |
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2033 // constant value (when vector is created with Replicate code). |
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2034 bool TypeVect::singleton(void) const { |
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2035 // There is no Con node for vectors yet. |
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2036 // return _elem->singleton(); |
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2037 return false; |
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2038 } |
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2039 |
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2040 bool TypeVect::empty(void) const { |
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2041 return _elem->empty(); |
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2042 } |
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2043 |
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2044 //------------------------------dump2------------------------------------------ |
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2045 #ifndef PRODUCT |
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2046 void TypeVect::dump2(Dict &d, uint depth, outputStream *st) const { |
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2047 switch (base()) { |
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2048 case VectorS: |
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2049 st->print("vectors["); break; |
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2050 case VectorD: |
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2051 st->print("vectord["); break; |
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2052 case VectorX: |
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2053 st->print("vectorx["); break; |
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2054 case VectorY: |
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2055 st->print("vectory["); break; |
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2056 default: |
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2057 ShouldNotReachHere(); |
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2058 } |
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2059 st->print("%d]:{", _length); |
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2060 _elem->dump2(d, depth, st); |
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2061 st->print("}"); |
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2062 } |
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2063 #endif |
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2064 |
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2065 |
0 | 2066 //============================================================================= |
2067 // Convenience common pre-built types. | |
2068 const TypePtr *TypePtr::NULL_PTR; | |
2069 const TypePtr *TypePtr::NOTNULL; | |
2070 const TypePtr *TypePtr::BOTTOM; | |
2071 | |
2072 //------------------------------meet------------------------------------------- | |
2073 // Meet over the PTR enum | |
2074 const TypePtr::PTR TypePtr::ptr_meet[TypePtr::lastPTR][TypePtr::lastPTR] = { | |
2075 // TopPTR, AnyNull, Constant, Null, NotNull, BotPTR, | |
2076 { /* Top */ TopPTR, AnyNull, Constant, Null, NotNull, BotPTR,}, | |
2077 { /* AnyNull */ AnyNull, AnyNull, Constant, BotPTR, NotNull, BotPTR,}, | |
2078 { /* Constant*/ Constant, Constant, Constant, BotPTR, NotNull, BotPTR,}, | |
2079 { /* Null */ Null, BotPTR, BotPTR, Null, BotPTR, BotPTR,}, | |
2080 { /* NotNull */ NotNull, NotNull, NotNull, BotPTR, NotNull, BotPTR,}, | |
2081 { /* BotPTR */ BotPTR, BotPTR, BotPTR, BotPTR, BotPTR, BotPTR,} | |
2082 }; | |
2083 | |
2084 //------------------------------make------------------------------------------- | |
2085 const TypePtr *TypePtr::make( TYPES t, enum PTR ptr, int offset ) { | |
2086 return (TypePtr*)(new TypePtr(t,ptr,offset))->hashcons(); | |
2087 } | |
2088 | |
2089 //------------------------------cast_to_ptr_type------------------------------- | |
2090 const Type *TypePtr::cast_to_ptr_type(PTR ptr) const { | |
2091 assert(_base == AnyPtr, "subclass must override cast_to_ptr_type"); | |
2092 if( ptr == _ptr ) return this; | |
2093 return make(_base, ptr, _offset); | |
2094 } | |
2095 | |
2096 //------------------------------get_con---------------------------------------- | |
2097 intptr_t TypePtr::get_con() const { | |
2098 assert( _ptr == Null, "" ); | |
2099 return _offset; | |
2100 } | |
2101 | |
2102 //------------------------------meet------------------------------------------- | |
2103 // Compute the MEET of two types. It returns a new Type object. | |
2104 const Type *TypePtr::xmeet( const Type *t ) const { | |
2105 // Perform a fast test for common case; meeting the same types together. | |
2106 if( this == t ) return this; // Meeting same type-rep? | |
2107 | |
2108 // Current "this->_base" is AnyPtr | |
2109 switch (t->base()) { // switch on original type | |
2110 case Int: // Mixing ints & oops happens when javac | |
2111 case Long: // reuses local variables | |
2112 case FloatTop: | |
2113 case FloatCon: | |
2114 case FloatBot: | |
2115 case DoubleTop: | |
2116 case DoubleCon: | |
2117 case DoubleBot: | |
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2118 case NarrowOop: |
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2119 case NarrowKlass: |
0 | 2120 case Bottom: // Ye Olde Default |
2121 return Type::BOTTOM; | |
2122 case Top: | |
2123 return this; | |
2124 | |
2125 case AnyPtr: { // Meeting to AnyPtrs | |
2126 const TypePtr *tp = t->is_ptr(); | |
2127 return make( AnyPtr, meet_ptr(tp->ptr()), meet_offset(tp->offset()) ); | |
2128 } | |
2129 case RawPtr: // For these, flip the call around to cut down | |
2130 case OopPtr: | |
2131 case InstPtr: // on the cases I have to handle. | |
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2132 case AryPtr: |
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2133 case MetadataPtr: |
0 | 2134 case KlassPtr: |
2135 return t->xmeet(this); // Call in reverse direction | |
2136 default: // All else is a mistake | |
2137 typerr(t); | |
2138 | |
2139 } | |
2140 return this; | |
2141 } | |
2142 | |
2143 //------------------------------meet_offset------------------------------------ | |
2144 int TypePtr::meet_offset( int offset ) const { | |
2145 // Either is 'TOP' offset? Return the other offset! | |
2146 if( _offset == OffsetTop ) return offset; | |
2147 if( offset == OffsetTop ) return _offset; | |
2148 // If either is different, return 'BOTTOM' offset | |
2149 if( _offset != offset ) return OffsetBot; | |
2150 return _offset; | |
2151 } | |
2152 | |
2153 //------------------------------dual_offset------------------------------------ | |
2154 int TypePtr::dual_offset( ) const { | |
2155 if( _offset == OffsetTop ) return OffsetBot;// Map 'TOP' into 'BOTTOM' | |
2156 if( _offset == OffsetBot ) return OffsetTop;// Map 'BOTTOM' into 'TOP' | |
2157 return _offset; // Map everything else into self | |
2158 } | |
2159 | |
2160 //------------------------------xdual------------------------------------------ | |
2161 // Dual: compute field-by-field dual | |
2162 const TypePtr::PTR TypePtr::ptr_dual[TypePtr::lastPTR] = { | |
2163 BotPTR, NotNull, Constant, Null, AnyNull, TopPTR | |
2164 }; | |
2165 const Type *TypePtr::xdual() const { | |
2166 return new TypePtr( AnyPtr, dual_ptr(), dual_offset() ); | |
2167 } | |
2168 | |
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2169 //------------------------------xadd_offset------------------------------------ |
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2170 int TypePtr::xadd_offset( intptr_t offset ) const { |
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2171 // Adding to 'TOP' offset? Return 'TOP'! |
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2172 if( _offset == OffsetTop || offset == OffsetTop ) return OffsetTop; |
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2173 // Adding to 'BOTTOM' offset? Return 'BOTTOM'! |
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2174 if( _offset == OffsetBot || offset == OffsetBot ) return OffsetBot; |
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2175 // Addition overflows or "accidentally" equals to OffsetTop? Return 'BOTTOM'! |
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2176 offset += (intptr_t)_offset; |
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2177 if (offset != (int)offset || offset == OffsetTop) return OffsetBot; |
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2178 |
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2179 // assert( _offset >= 0 && _offset+offset >= 0, "" ); |
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2180 // It is possible to construct a negative offset during PhaseCCP |
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2181 |
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2182 return (int)offset; // Sum valid offsets |
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2183 } |
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2184 |
0 | 2185 //------------------------------add_offset------------------------------------- |
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2186 const TypePtr *TypePtr::add_offset( intptr_t offset ) const { |
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2187 return make( AnyPtr, _ptr, xadd_offset(offset) ); |
0 | 2188 } |
2189 | |
2190 //------------------------------eq--------------------------------------------- | |
2191 // Structural equality check for Type representations | |
2192 bool TypePtr::eq( const Type *t ) const { | |
2193 const TypePtr *a = (const TypePtr*)t; | |
2194 return _ptr == a->ptr() && _offset == a->offset(); | |
2195 } | |
2196 | |
2197 //------------------------------hash------------------------------------------- | |
2198 // Type-specific hashing function. | |
2199 int TypePtr::hash(void) const { | |
2200 return _ptr + _offset; | |
2201 } | |
2202 | |
2203 //------------------------------dump2------------------------------------------ | |
2204 const char *const TypePtr::ptr_msg[TypePtr::lastPTR] = { | |
2205 "TopPTR","AnyNull","Constant","NULL","NotNull","BotPTR" | |
2206 }; | |
2207 | |
2208 #ifndef PRODUCT | |
2209 void TypePtr::dump2( Dict &d, uint depth, outputStream *st ) const { | |
2210 if( _ptr == Null ) st->print("NULL"); | |
2211 else st->print("%s *", ptr_msg[_ptr]); | |
2212 if( _offset == OffsetTop ) st->print("+top"); | |
2213 else if( _offset == OffsetBot ) st->print("+bot"); | |
2214 else if( _offset ) st->print("+%d", _offset); | |
2215 } | |
2216 #endif | |
2217 | |
2218 //------------------------------singleton-------------------------------------- | |
2219 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
2220 // constants | |
2221 bool TypePtr::singleton(void) const { | |
2222 // TopPTR, Null, AnyNull, Constant are all singletons | |
2223 return (_offset != OffsetBot) && !below_centerline(_ptr); | |
2224 } | |
2225 | |
2226 bool TypePtr::empty(void) const { | |
2227 return (_offset == OffsetTop) || above_centerline(_ptr); | |
2228 } | |
2229 | |
2230 //============================================================================= | |
2231 // Convenience common pre-built types. | |
2232 const TypeRawPtr *TypeRawPtr::BOTTOM; | |
2233 const TypeRawPtr *TypeRawPtr::NOTNULL; | |
2234 | |
2235 //------------------------------make------------------------------------------- | |
2236 const TypeRawPtr *TypeRawPtr::make( enum PTR ptr ) { | |
2237 assert( ptr != Constant, "what is the constant?" ); | |
2238 assert( ptr != Null, "Use TypePtr for NULL" ); | |
2239 return (TypeRawPtr*)(new TypeRawPtr(ptr,0))->hashcons(); | |
2240 } | |
2241 | |
2242 const TypeRawPtr *TypeRawPtr::make( address bits ) { | |
2243 assert( bits, "Use TypePtr for NULL" ); | |
2244 return (TypeRawPtr*)(new TypeRawPtr(Constant,bits))->hashcons(); | |
2245 } | |
2246 | |
2247 //------------------------------cast_to_ptr_type------------------------------- | |
2248 const Type *TypeRawPtr::cast_to_ptr_type(PTR ptr) const { | |
2249 assert( ptr != Constant, "what is the constant?" ); | |
2250 assert( ptr != Null, "Use TypePtr for NULL" ); | |
2251 assert( _bits==0, "Why cast a constant address?"); | |
2252 if( ptr == _ptr ) return this; | |
2253 return make(ptr); | |
2254 } | |
2255 | |
2256 //------------------------------get_con---------------------------------------- | |
2257 intptr_t TypeRawPtr::get_con() const { | |
2258 assert( _ptr == Null || _ptr == Constant, "" ); | |
2259 return (intptr_t)_bits; | |
2260 } | |
2261 | |
2262 //------------------------------meet------------------------------------------- | |
2263 // Compute the MEET of two types. It returns a new Type object. | |
2264 const Type *TypeRawPtr::xmeet( const Type *t ) const { | |
2265 // Perform a fast test for common case; meeting the same types together. | |
2266 if( this == t ) return this; // Meeting same type-rep? | |
2267 | |
2268 // Current "this->_base" is RawPtr | |
2269 switch( t->base() ) { // switch on original type | |
2270 case Bottom: // Ye Olde Default | |
2271 return t; | |
2272 case Top: | |
2273 return this; | |
2274 case AnyPtr: // Meeting to AnyPtrs | |
2275 break; | |
2276 case RawPtr: { // might be top, bot, any/not or constant | |
2277 enum PTR tptr = t->is_ptr()->ptr(); | |
2278 enum PTR ptr = meet_ptr( tptr ); | |
2279 if( ptr == Constant ) { // Cannot be equal constants, so... | |
2280 if( tptr == Constant && _ptr != Constant) return t; | |
2281 if( _ptr == Constant && tptr != Constant) return this; | |
2282 ptr = NotNull; // Fall down in lattice | |
2283 } | |
2284 return make( ptr ); | |
2285 } | |
2286 | |
2287 case OopPtr: | |
2288 case InstPtr: | |
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2289 case AryPtr: |
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2290 case MetadataPtr: |
0 | 2291 case KlassPtr: |
2292 return TypePtr::BOTTOM; // Oop meet raw is not well defined | |
2293 default: // All else is a mistake | |
2294 typerr(t); | |
2295 } | |
2296 | |
2297 // Found an AnyPtr type vs self-RawPtr type | |
2298 const TypePtr *tp = t->is_ptr(); | |
2299 switch (tp->ptr()) { | |
2300 case TypePtr::TopPTR: return this; | |
2301 case TypePtr::BotPTR: return t; | |
2302 case TypePtr::Null: | |
2303 if( _ptr == TypePtr::TopPTR ) return t; | |
2304 return TypeRawPtr::BOTTOM; | |
2305 case TypePtr::NotNull: return TypePtr::make( AnyPtr, meet_ptr(TypePtr::NotNull), tp->meet_offset(0) ); | |
2306 case TypePtr::AnyNull: | |
2307 if( _ptr == TypePtr::Constant) return this; | |
2308 return make( meet_ptr(TypePtr::AnyNull) ); | |
2309 default: ShouldNotReachHere(); | |
2310 } | |
2311 return this; | |
2312 } | |
2313 | |
2314 //------------------------------xdual------------------------------------------ | |
2315 // Dual: compute field-by-field dual | |
2316 const Type *TypeRawPtr::xdual() const { | |
2317 return new TypeRawPtr( dual_ptr(), _bits ); | |
2318 } | |
2319 | |
2320 //------------------------------add_offset------------------------------------- | |
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2321 const TypePtr *TypeRawPtr::add_offset( intptr_t offset ) const { |
0 | 2322 if( offset == OffsetTop ) return BOTTOM; // Undefined offset-> undefined pointer |
2323 if( offset == OffsetBot ) return BOTTOM; // Unknown offset-> unknown pointer | |
2324 if( offset == 0 ) return this; // No change | |
2325 switch (_ptr) { | |
2326 case TypePtr::TopPTR: | |
2327 case TypePtr::BotPTR: | |
2328 case TypePtr::NotNull: | |
2329 return this; | |
2330 case TypePtr::Null: | |
2115
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2331 case TypePtr::Constant: { |
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2332 address bits = _bits+offset; |
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2333 if ( bits == 0 ) return TypePtr::NULL_PTR; |
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2334 return make( bits ); |
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2335 } |
0 | 2336 default: ShouldNotReachHere(); |
2337 } | |
2338 return NULL; // Lint noise | |
2339 } | |
2340 | |
2341 //------------------------------eq--------------------------------------------- | |
2342 // Structural equality check for Type representations | |
2343 bool TypeRawPtr::eq( const Type *t ) const { | |
2344 const TypeRawPtr *a = (const TypeRawPtr*)t; | |
2345 return _bits == a->_bits && TypePtr::eq(t); | |
2346 } | |
2347 | |
2348 //------------------------------hash------------------------------------------- | |
2349 // Type-specific hashing function. | |
2350 int TypeRawPtr::hash(void) const { | |
2351 return (intptr_t)_bits + TypePtr::hash(); | |
2352 } | |
2353 | |
2354 //------------------------------dump2------------------------------------------ | |
2355 #ifndef PRODUCT | |
2356 void TypeRawPtr::dump2( Dict &d, uint depth, outputStream *st ) const { | |
2357 if( _ptr == Constant ) | |
2358 st->print(INTPTR_FORMAT, _bits); | |
2359 else | |
2360 st->print("rawptr:%s", ptr_msg[_ptr]); | |
2361 } | |
2362 #endif | |
2363 | |
2364 //============================================================================= | |
2365 // Convenience common pre-built type. | |
2366 const TypeOopPtr *TypeOopPtr::BOTTOM; | |
2367 | |
163 | 2368 //------------------------------TypeOopPtr------------------------------------- |
2369 TypeOopPtr::TypeOopPtr( TYPES t, PTR ptr, ciKlass* k, bool xk, ciObject* o, int offset, int instance_id ) | |
2370 : TypePtr(t, ptr, offset), | |
2371 _const_oop(o), _klass(k), | |
2372 _klass_is_exact(xk), | |
2373 _is_ptr_to_narrowoop(false), | |
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2374 _is_ptr_to_narrowklass(false), |
163 | 2375 _instance_id(instance_id) { |
2376 #ifdef _LP64 | |
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2377 if (_offset != 0) { |
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2378 if (_offset == oopDesc::klass_offset_in_bytes()) { |
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2379 _is_ptr_to_narrowklass = UseCompressedKlassPointers; |
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2380 } else if (klass() == NULL) { |
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2381 // Array with unknown body type |
163 | 2382 assert(this->isa_aryptr(), "only arrays without klass"); |
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2383 _is_ptr_to_narrowoop = UseCompressedOops; |
163 | 2384 } else if (this->isa_aryptr()) { |
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2385 _is_ptr_to_narrowoop = (UseCompressedOops && klass()->is_obj_array_klass() && |
163 | 2386 _offset != arrayOopDesc::length_offset_in_bytes()); |
2387 } else if (klass()->is_instance_klass()) { | |
2388 ciInstanceKlass* ik = klass()->as_instance_klass(); | |
2389 ciField* field = NULL; | |
2390 if (this->isa_klassptr()) { | |
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2391 // Perm objects don't use compressed references |
163 | 2392 } else if (_offset == OffsetBot || _offset == OffsetTop) { |
2393 // unsafe access | |
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2394 _is_ptr_to_narrowoop = UseCompressedOops; |
163 | 2395 } else { // exclude unsafe ops |
2396 assert(this->isa_instptr(), "must be an instance ptr."); | |
2376
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2397 |
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2398 if (klass() == ciEnv::current()->Class_klass() && |
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2399 (_offset == java_lang_Class::klass_offset_in_bytes() || |
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2400 _offset == java_lang_Class::array_klass_offset_in_bytes())) { |
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2401 // Special hidden fields from the Class. |
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2402 assert(this->isa_instptr(), "must be an instance ptr."); |
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2403 _is_ptr_to_narrowoop = false; |
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2404 } else if (klass() == ciEnv::current()->Class_klass() && |
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2405 _offset >= InstanceMirrorKlass::offset_of_static_fields()) { |
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2406 // Static fields |
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2407 assert(o != NULL, "must be constant"); |
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2408 ciInstanceKlass* k = o->as_instance()->java_lang_Class_klass()->as_instance_klass(); |
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2409 ciField* field = k->get_field_by_offset(_offset, true); |
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2410 assert(field != NULL, "missing field"); |
163 | 2411 BasicType basic_elem_type = field->layout_type(); |
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2412 _is_ptr_to_narrowoop = UseCompressedOops && (basic_elem_type == T_OBJECT || |
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2413 basic_elem_type == T_ARRAY); |
163 | 2414 } else { |
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2415 // Instance fields which contains a compressed oop references. |
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2416 field = ik->get_field_by_offset(_offset, false); |
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2417 if (field != NULL) { |
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2418 BasicType basic_elem_type = field->layout_type(); |
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2419 _is_ptr_to_narrowoop = UseCompressedOops && (basic_elem_type == T_OBJECT || |
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2420 basic_elem_type == T_ARRAY); |
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2421 } else if (klass()->equals(ciEnv::current()->Object_klass())) { |
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2422 // Compile::find_alias_type() cast exactness on all types to verify |
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2423 // that it does not affect alias type. |
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2424 _is_ptr_to_narrowoop = UseCompressedOops; |
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2425 } else { |
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2426 // Type for the copy start in LibraryCallKit::inline_native_clone(). |
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2427 _is_ptr_to_narrowoop = UseCompressedOops; |
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2428 } |
163 | 2429 } |
2430 } | |
2431 } | |
2432 } | |
2433 #endif | |
2434 } | |
2435 | |
0 | 2436 //------------------------------make------------------------------------------- |
2437 const TypeOopPtr *TypeOopPtr::make(PTR ptr, | |
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2438 int offset, int instance_id) { |
0 | 2439 assert(ptr != Constant, "no constant generic pointers"); |
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2440 ciKlass* k = Compile::current()->env()->Object_klass(); |
0 | 2441 bool xk = false; |
2442 ciObject* o = NULL; | |
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2443 return (TypeOopPtr*)(new TypeOopPtr(OopPtr, ptr, k, xk, o, offset, instance_id))->hashcons(); |
0 | 2444 } |
2445 | |
2446 | |
2447 //------------------------------cast_to_ptr_type------------------------------- | |
2448 const Type *TypeOopPtr::cast_to_ptr_type(PTR ptr) const { | |
2449 assert(_base == OopPtr, "subclass must override cast_to_ptr_type"); | |
2450 if( ptr == _ptr ) return this; | |
992 | 2451 return make(ptr, _offset, _instance_id); |
0 | 2452 } |
2453 | |
247 | 2454 //-----------------------------cast_to_instance_id---------------------------- |
223 | 2455 const TypeOopPtr *TypeOopPtr::cast_to_instance_id(int instance_id) const { |
0 | 2456 // There are no instances of a general oop. |
2457 // Return self unchanged. | |
2458 return this; | |
2459 } | |
2460 | |
2461 //-----------------------------cast_to_exactness------------------------------- | |
2462 const Type *TypeOopPtr::cast_to_exactness(bool klass_is_exact) const { | |
2463 // There is no such thing as an exact general oop. | |
2464 // Return self unchanged. | |
2465 return this; | |
2466 } | |
2467 | |
2468 | |
2469 //------------------------------as_klass_type---------------------------------- | |
2470 // Return the klass type corresponding to this instance or array type. | |
2471 // It is the type that is loaded from an object of this type. | |
2472 const TypeKlassPtr* TypeOopPtr::as_klass_type() const { | |
2473 ciKlass* k = klass(); | |
2474 bool xk = klass_is_exact(); | |
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2475 if (k == NULL) |
0 | 2476 return TypeKlassPtr::OBJECT; |
2477 else | |
2478 return TypeKlassPtr::make(xk? Constant: NotNull, k, 0); | |
2479 } | |
2480 | |
2481 | |
2482 //------------------------------meet------------------------------------------- | |
2483 // Compute the MEET of two types. It returns a new Type object. | |
2484 const Type *TypeOopPtr::xmeet( const Type *t ) const { | |
2485 // Perform a fast test for common case; meeting the same types together. | |
2486 if( this == t ) return this; // Meeting same type-rep? | |
2487 | |
2488 // Current "this->_base" is OopPtr | |
2489 switch (t->base()) { // switch on original type | |
2490 | |
2491 case Int: // Mixing ints & oops happens when javac | |
2492 case Long: // reuses local variables | |
2493 case FloatTop: | |
2494 case FloatCon: | |
2495 case FloatBot: | |
2496 case DoubleTop: | |
2497 case DoubleCon: | |
2498 case DoubleBot: | |
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2499 case NarrowOop: |
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2500 case NarrowKlass: |
0 | 2501 case Bottom: // Ye Olde Default |
2502 return Type::BOTTOM; | |
2503 case Top: | |
2504 return this; | |
2505 | |
2506 default: // All else is a mistake | |
2507 typerr(t); | |
2508 | |
2509 case RawPtr: | |
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2510 case MetadataPtr: |
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2511 case KlassPtr: |
0 | 2512 return TypePtr::BOTTOM; // Oop meet raw is not well defined |
2513 | |
2514 case AnyPtr: { | |
2515 // Found an AnyPtr type vs self-OopPtr type | |
2516 const TypePtr *tp = t->is_ptr(); | |
2517 int offset = meet_offset(tp->offset()); | |
2518 PTR ptr = meet_ptr(tp->ptr()); | |
2519 switch (tp->ptr()) { | |
2520 case Null: | |
2521 if (ptr == Null) return TypePtr::make(AnyPtr, ptr, offset); | |
2522 // else fall through: | |
2523 case TopPTR: | |
992 | 2524 case AnyNull: { |
2525 int instance_id = meet_instance_id(InstanceTop); | |
2526 return make(ptr, offset, instance_id); | |
2527 } | |
0 | 2528 case BotPTR: |
2529 case NotNull: | |
2530 return TypePtr::make(AnyPtr, ptr, offset); | |
2531 default: typerr(t); | |
2532 } | |
2533 } | |
2534 | |
2535 case OopPtr: { // Meeting to other OopPtrs | |
2536 const TypeOopPtr *tp = t->is_oopptr(); | |
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2537 int instance_id = meet_instance_id(tp->instance_id()); |
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2538 return make( meet_ptr(tp->ptr()), meet_offset(tp->offset()), instance_id ); |
0 | 2539 } |
2540 | |
2541 case InstPtr: // For these, flip the call around to cut down | |
2542 case AryPtr: | |
2543 return t->xmeet(this); // Call in reverse direction | |
2544 | |
2545 } // End of switch | |
2546 return this; // Return the double constant | |
2547 } | |
2548 | |
2549 | |
2550 //------------------------------xdual------------------------------------------ | |
2551 // Dual of a pure heap pointer. No relevant klass or oop information. | |
2552 const Type *TypeOopPtr::xdual() const { | |
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2553 assert(klass() == Compile::current()->env()->Object_klass(), "no klasses here"); |
0 | 2554 assert(const_oop() == NULL, "no constants here"); |
223 | 2555 return new TypeOopPtr(_base, dual_ptr(), klass(), klass_is_exact(), const_oop(), dual_offset(), dual_instance_id() ); |
0 | 2556 } |
2557 | |
2558 //--------------------------make_from_klass_common----------------------------- | |
2559 // Computes the element-type given a klass. | |
2560 const TypeOopPtr* TypeOopPtr::make_from_klass_common(ciKlass *klass, bool klass_change, bool try_for_exact) { | |
2561 if (klass->is_instance_klass()) { | |
2562 Compile* C = Compile::current(); | |
2563 Dependencies* deps = C->dependencies(); | |
2564 assert((deps != NULL) == (C->method() != NULL && C->method()->code_size() > 0), "sanity"); | |
2565 // Element is an instance | |
2566 bool klass_is_exact = false; | |
2567 if (klass->is_loaded()) { | |
2568 // Try to set klass_is_exact. | |
2569 ciInstanceKlass* ik = klass->as_instance_klass(); | |
2570 klass_is_exact = ik->is_final(); | |
2571 if (!klass_is_exact && klass_change | |
2572 && deps != NULL && UseUniqueSubclasses) { | |
2573 ciInstanceKlass* sub = ik->unique_concrete_subklass(); | |
2574 if (sub != NULL) { | |
2575 deps->assert_abstract_with_unique_concrete_subtype(ik, sub); | |
2576 klass = ik = sub; | |
2577 klass_is_exact = sub->is_final(); | |
2578 } | |
2579 } | |
2580 if (!klass_is_exact && try_for_exact | |
2581 && deps != NULL && UseExactTypes) { | |
2582 if (!ik->is_interface() && !ik->has_subklass()) { | |
2583 // Add a dependence; if concrete subclass added we need to recompile | |
2584 deps->assert_leaf_type(ik); | |
2585 klass_is_exact = true; | |
2586 } | |
2587 } | |
2588 } | |
2589 return TypeInstPtr::make(TypePtr::BotPTR, klass, klass_is_exact, NULL, 0); | |
2590 } else if (klass->is_obj_array_klass()) { | |
2591 // Element is an object array. Recursively call ourself. | |
2592 const TypeOopPtr *etype = TypeOopPtr::make_from_klass_common(klass->as_obj_array_klass()->element_klass(), false, try_for_exact); | |
2593 bool xk = etype->klass_is_exact(); | |
2594 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::POS); | |
2595 // We used to pass NotNull in here, asserting that the sub-arrays | |
2596 // are all not-null. This is not true in generally, as code can | |
2597 // slam NULLs down in the subarrays. | |
2598 const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::BotPTR, arr0, klass, xk, 0); | |
2599 return arr; | |
2600 } else if (klass->is_type_array_klass()) { | |
2601 // Element is an typeArray | |
2602 const Type* etype = get_const_basic_type(klass->as_type_array_klass()->element_type()); | |
2603 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::POS); | |
2604 // We used to pass NotNull in here, asserting that the array pointer | |
2605 // is not-null. That was not true in general. | |
2606 const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::BotPTR, arr0, klass, true, 0); | |
2607 return arr; | |
2608 } else { | |
2609 ShouldNotReachHere(); | |
2610 return NULL; | |
2611 } | |
2612 } | |
2613 | |
2614 //------------------------------make_from_constant----------------------------- | |
2615 // Make a java pointer from an oop constant | |
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2616 const TypeOopPtr* TypeOopPtr::make_from_constant(ciObject* o, bool require_constant) { |
0 | 2617 assert(!o->is_null_object(), "null object not yet handled here."); |
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2618 ciKlass* klass = o->klass(); |
0 | 2619 if (klass->is_instance_klass()) { |
2620 // Element is an instance | |
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2621 if (require_constant) { |
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2622 if (!o->can_be_constant()) return NULL; |
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2623 } else if (!o->should_be_constant()) { |
0 | 2624 return TypeInstPtr::make(TypePtr::NotNull, klass, true, NULL, 0); |
2625 } | |
2626 return TypeInstPtr::make(o); | |
2627 } else if (klass->is_obj_array_klass()) { | |
2628 // Element is an object array. Recursively call ourself. | |
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2629 const Type *etype = |
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2630 TypeOopPtr::make_from_klass_raw(klass->as_obj_array_klass()->element_klass()); |
0 | 2631 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::make(o->as_array()->length())); |
2632 // We used to pass NotNull in here, asserting that the sub-arrays | |
2633 // are all not-null. This is not true in generally, as code can | |
2634 // slam NULLs down in the subarrays. | |
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2635 if (require_constant) { |
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2636 if (!o->can_be_constant()) return NULL; |
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2637 } else if (!o->should_be_constant()) { |
0 | 2638 return TypeAryPtr::make(TypePtr::NotNull, arr0, klass, true, 0); |
2639 } | |
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2640 const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::Constant, o, arr0, klass, true, 0); |
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2641 return arr; |
0 | 2642 } else if (klass->is_type_array_klass()) { |
2643 // Element is an typeArray | |
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2644 const Type* etype = |
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2645 (Type*)get_const_basic_type(klass->as_type_array_klass()->element_type()); |
0 | 2646 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::make(o->as_array()->length())); |
2647 // We used to pass NotNull in here, asserting that the array pointer | |
2648 // is not-null. That was not true in general. | |
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2649 if (require_constant) { |
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2650 if (!o->can_be_constant()) return NULL; |
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2651 } else if (!o->should_be_constant()) { |
0 | 2652 return TypeAryPtr::make(TypePtr::NotNull, arr0, klass, true, 0); |
2653 } | |
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2654 const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::Constant, o, arr0, klass, true, 0); |
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2655 return arr; |
0 | 2656 } |
2657 | |
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2658 fatal("unhandled object type"); |
0 | 2659 return NULL; |
2660 } | |
2661 | |
2662 //------------------------------get_con---------------------------------------- | |
2663 intptr_t TypeOopPtr::get_con() const { | |
2664 assert( _ptr == Null || _ptr == Constant, "" ); | |
2665 assert( _offset >= 0, "" ); | |
2666 | |
2667 if (_offset != 0) { | |
2668 // After being ported to the compiler interface, the compiler no longer | |
2669 // directly manipulates the addresses of oops. Rather, it only has a pointer | |
2670 // to a handle at compile time. This handle is embedded in the generated | |
2671 // code and dereferenced at the time the nmethod is made. Until that time, | |
2672 // it is not reasonable to do arithmetic with the addresses of oops (we don't | |
2673 // have access to the addresses!). This does not seem to currently happen, | |
605 | 2674 // but this assertion here is to help prevent its occurence. |
0 | 2675 tty->print_cr("Found oop constant with non-zero offset"); |
2676 ShouldNotReachHere(); | |
2677 } | |
2678 | |
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2679 return (intptr_t)const_oop()->constant_encoding(); |
0 | 2680 } |
2681 | |
2682 | |
2683 //-----------------------------filter------------------------------------------ | |
2684 // Do not allow interface-vs.-noninterface joins to collapse to top. | |
2685 const Type *TypeOopPtr::filter( const Type *kills ) const { | |
2686 | |
2687 const Type* ft = join(kills); | |
2688 const TypeInstPtr* ftip = ft->isa_instptr(); | |
2689 const TypeInstPtr* ktip = kills->isa_instptr(); | |
555 | 2690 const TypeKlassPtr* ftkp = ft->isa_klassptr(); |
2691 const TypeKlassPtr* ktkp = kills->isa_klassptr(); | |
0 | 2692 |
2693 if (ft->empty()) { | |
2694 // Check for evil case of 'this' being a class and 'kills' expecting an | |
2695 // interface. This can happen because the bytecodes do not contain | |
2696 // enough type info to distinguish a Java-level interface variable | |
2697 // from a Java-level object variable. If we meet 2 classes which | |
2698 // both implement interface I, but their meet is at 'j/l/O' which | |
2699 // doesn't implement I, we have no way to tell if the result should | |
2700 // be 'I' or 'j/l/O'. Thus we'll pick 'j/l/O'. If this then flows | |
2701 // into a Phi which "knows" it's an Interface type we'll have to | |
2702 // uplift the type. | |
2703 if (!empty() && ktip != NULL && ktip->is_loaded() && ktip->klass()->is_interface()) | |
2704 return kills; // Uplift to interface | |
555 | 2705 if (!empty() && ktkp != NULL && ktkp->klass()->is_loaded() && ktkp->klass()->is_interface()) |
2706 return kills; // Uplift to interface | |
0 | 2707 |
2708 return Type::TOP; // Canonical empty value | |
2709 } | |
2710 | |
2711 // If we have an interface-typed Phi or cast and we narrow to a class type, | |
2712 // the join should report back the class. However, if we have a J/L/Object | |
2713 // class-typed Phi and an interface flows in, it's possible that the meet & | |
2714 // join report an interface back out. This isn't possible but happens | |
2715 // because the type system doesn't interact well with interfaces. | |
2716 if (ftip != NULL && ktip != NULL && | |
2717 ftip->is_loaded() && ftip->klass()->is_interface() && | |
2718 ktip->is_loaded() && !ktip->klass()->is_interface()) { | |
2719 // Happens in a CTW of rt.jar, 320-341, no extra flags | |
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2720 assert(!ftip->klass_is_exact(), "interface could not be exact"); |
0 | 2721 return ktip->cast_to_ptr_type(ftip->ptr()); |
2722 } | |
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2723 // Interface klass type could be exact in opposite to interface type, |
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2724 // return it here instead of incorrect Constant ptr J/L/Object (6894807). |
555 | 2725 if (ftkp != NULL && ktkp != NULL && |
2726 ftkp->is_loaded() && ftkp->klass()->is_interface() && | |
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2727 !ftkp->klass_is_exact() && // Keep exact interface klass |
555 | 2728 ktkp->is_loaded() && !ktkp->klass()->is_interface()) { |
2729 return ktkp->cast_to_ptr_type(ftkp->ptr()); | |
2730 } | |
0 | 2731 |
2732 return ft; | |
2733 } | |
2734 | |
2735 //------------------------------eq--------------------------------------------- | |
2736 // Structural equality check for Type representations | |
2737 bool TypeOopPtr::eq( const Type *t ) const { | |
2738 const TypeOopPtr *a = (const TypeOopPtr*)t; | |
2739 if (_klass_is_exact != a->_klass_is_exact || | |
2740 _instance_id != a->_instance_id) return false; | |
2741 ciObject* one = const_oop(); | |
2742 ciObject* two = a->const_oop(); | |
2743 if (one == NULL || two == NULL) { | |
2744 return (one == two) && TypePtr::eq(t); | |
2745 } else { | |
2746 return one->equals(two) && TypePtr::eq(t); | |
2747 } | |
2748 } | |
2749 | |
2750 //------------------------------hash------------------------------------------- | |
2751 // Type-specific hashing function. | |
2752 int TypeOopPtr::hash(void) const { | |
2753 return | |
2754 (const_oop() ? const_oop()->hash() : 0) + | |
2755 _klass_is_exact + | |
2756 _instance_id + | |
2757 TypePtr::hash(); | |
2758 } | |
2759 | |
2760 //------------------------------dump2------------------------------------------ | |
2761 #ifndef PRODUCT | |
2762 void TypeOopPtr::dump2( Dict &d, uint depth, outputStream *st ) const { | |
2763 st->print("oopptr:%s", ptr_msg[_ptr]); | |
2764 if( _klass_is_exact ) st->print(":exact"); | |
2765 if( const_oop() ) st->print(INTPTR_FORMAT, const_oop()); | |
2766 switch( _offset ) { | |
2767 case OffsetTop: st->print("+top"); break; | |
2768 case OffsetBot: st->print("+any"); break; | |
2769 case 0: break; | |
2770 default: st->print("+%d",_offset); break; | |
2771 } | |
223 | 2772 if (_instance_id == InstanceTop) |
2773 st->print(",iid=top"); | |
2774 else if (_instance_id != InstanceBot) | |
0 | 2775 st->print(",iid=%d",_instance_id); |
2776 } | |
2777 #endif | |
2778 | |
2779 //------------------------------singleton-------------------------------------- | |
2780 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
2781 // constants | |
2782 bool TypeOopPtr::singleton(void) const { | |
2783 // detune optimizer to not generate constant oop + constant offset as a constant! | |
2784 // TopPTR, Null, AnyNull, Constant are all singletons | |
2785 return (_offset == 0) && !below_centerline(_ptr); | |
2786 } | |
2787 | |
2788 //------------------------------add_offset------------------------------------- | |
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2789 const TypePtr *TypeOopPtr::add_offset( intptr_t offset ) const { |
992 | 2790 return make( _ptr, xadd_offset(offset), _instance_id); |
0 | 2791 } |
2792 | |
223 | 2793 //------------------------------meet_instance_id-------------------------------- |
2794 int TypeOopPtr::meet_instance_id( int instance_id ) const { | |
2795 // Either is 'TOP' instance? Return the other instance! | |
2796 if( _instance_id == InstanceTop ) return instance_id; | |
2797 if( instance_id == InstanceTop ) return _instance_id; | |
2798 // If either is different, return 'BOTTOM' instance | |
2799 if( _instance_id != instance_id ) return InstanceBot; | |
2800 return _instance_id; | |
0 | 2801 } |
2802 | |
223 | 2803 //------------------------------dual_instance_id-------------------------------- |
2804 int TypeOopPtr::dual_instance_id( ) const { | |
2805 if( _instance_id == InstanceTop ) return InstanceBot; // Map TOP into BOTTOM | |
2806 if( _instance_id == InstanceBot ) return InstanceTop; // Map BOTTOM into TOP | |
2807 return _instance_id; // Map everything else into self | |
2808 } | |
2809 | |
2810 | |
0 | 2811 //============================================================================= |
2812 // Convenience common pre-built types. | |
2813 const TypeInstPtr *TypeInstPtr::NOTNULL; | |
2814 const TypeInstPtr *TypeInstPtr::BOTTOM; | |
2815 const TypeInstPtr *TypeInstPtr::MIRROR; | |
2816 const TypeInstPtr *TypeInstPtr::MARK; | |
2817 const TypeInstPtr *TypeInstPtr::KLASS; | |
2818 | |
2819 //------------------------------TypeInstPtr------------------------------------- | |
2820 TypeInstPtr::TypeInstPtr(PTR ptr, ciKlass* k, bool xk, ciObject* o, int off, int instance_id) | |
2821 : TypeOopPtr(InstPtr, ptr, k, xk, o, off, instance_id), _name(k->name()) { | |
2822 assert(k != NULL && | |
2823 (k->is_loaded() || o == NULL), | |
2824 "cannot have constants with non-loaded klass"); | |
2825 }; | |
2826 | |
2827 //------------------------------make------------------------------------------- | |
2828 const TypeInstPtr *TypeInstPtr::make(PTR ptr, | |
2829 ciKlass* k, | |
2830 bool xk, | |
2831 ciObject* o, | |
2832 int offset, | |
2833 int instance_id) { | |
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2834 assert( !k->is_loaded() || k->is_instance_klass(), "Must be for instance"); |
0 | 2835 // Either const_oop() is NULL or else ptr is Constant |
2836 assert( (!o && ptr != Constant) || (o && ptr == Constant), | |
2837 "constant pointers must have a value supplied" ); | |
2838 // Ptr is never Null | |
2839 assert( ptr != Null, "NULL pointers are not typed" ); | |
2840 | |
247 | 2841 assert(instance_id <= 0 || xk || !UseExactTypes, "instances are always exactly typed"); |
0 | 2842 if (!UseExactTypes) xk = false; |
2843 if (ptr == Constant) { | |
2844 // Note: This case includes meta-object constants, such as methods. | |
2845 xk = true; | |
2846 } else if (k->is_loaded()) { | |
2847 ciInstanceKlass* ik = k->as_instance_klass(); | |
2848 if (!xk && ik->is_final()) xk = true; // no inexact final klass | |
2849 if (xk && ik->is_interface()) xk = false; // no exact interface | |
2850 } | |
2851 | |
2852 // Now hash this baby | |
2853 TypeInstPtr *result = | |
2854 (TypeInstPtr*)(new TypeInstPtr(ptr, k, xk, o ,offset, instance_id))->hashcons(); | |
2855 | |
2856 return result; | |
2857 } | |
2858 | |
2859 | |
2860 //------------------------------cast_to_ptr_type------------------------------- | |
2861 const Type *TypeInstPtr::cast_to_ptr_type(PTR ptr) const { | |
2862 if( ptr == _ptr ) return this; | |
2863 // Reconstruct _sig info here since not a problem with later lazy | |
2864 // construction, _sig will show up on demand. | |
223 | 2865 return make(ptr, klass(), klass_is_exact(), const_oop(), _offset, _instance_id); |
0 | 2866 } |
2867 | |
2868 | |
2869 //-----------------------------cast_to_exactness------------------------------- | |
2870 const Type *TypeInstPtr::cast_to_exactness(bool klass_is_exact) const { | |
2871 if( klass_is_exact == _klass_is_exact ) return this; | |
2872 if (!UseExactTypes) return this; | |
2873 if (!_klass->is_loaded()) return this; | |
2874 ciInstanceKlass* ik = _klass->as_instance_klass(); | |
2875 if( (ik->is_final() || _const_oop) ) return this; // cannot clear xk | |
2876 if( ik->is_interface() ) return this; // cannot set xk | |
2877 return make(ptr(), klass(), klass_is_exact, const_oop(), _offset, _instance_id); | |
2878 } | |
2879 | |
247 | 2880 //-----------------------------cast_to_instance_id---------------------------- |
223 | 2881 const TypeOopPtr *TypeInstPtr::cast_to_instance_id(int instance_id) const { |
2882 if( instance_id == _instance_id ) return this; | |
247 | 2883 return make(_ptr, klass(), _klass_is_exact, const_oop(), _offset, instance_id); |
0 | 2884 } |
2885 | |
2886 //------------------------------xmeet_unloaded--------------------------------- | |
2887 // Compute the MEET of two InstPtrs when at least one is unloaded. | |
2888 // Assume classes are different since called after check for same name/class-loader | |
2889 const TypeInstPtr *TypeInstPtr::xmeet_unloaded(const TypeInstPtr *tinst) const { | |
2890 int off = meet_offset(tinst->offset()); | |
2891 PTR ptr = meet_ptr(tinst->ptr()); | |
992 | 2892 int instance_id = meet_instance_id(tinst->instance_id()); |
0 | 2893 |
2894 const TypeInstPtr *loaded = is_loaded() ? this : tinst; | |
2895 const TypeInstPtr *unloaded = is_loaded() ? tinst : this; | |
2896 if( loaded->klass()->equals(ciEnv::current()->Object_klass()) ) { | |
2897 // | |
2898 // Meet unloaded class with java/lang/Object | |
2899 // | |
2900 // Meet | |
2901 // | Unloaded Class | |
2902 // Object | TOP | AnyNull | Constant | NotNull | BOTTOM | | |
2903 // =================================================================== | |
2904 // TOP | ..........................Unloaded......................| | |
2905 // AnyNull | U-AN |................Unloaded......................| | |
2906 // Constant | ... O-NN .................................. | O-BOT | | |
2907 // NotNull | ... O-NN .................................. | O-BOT | | |
2908 // BOTTOM | ........................Object-BOTTOM ..................| | |
2909 // | |
2910 assert(loaded->ptr() != TypePtr::Null, "insanity check"); | |
2911 // | |
2912 if( loaded->ptr() == TypePtr::TopPTR ) { return unloaded; } | |
992 | 2913 else if (loaded->ptr() == TypePtr::AnyNull) { return TypeInstPtr::make( ptr, unloaded->klass(), false, NULL, off, instance_id ); } |
0 | 2914 else if (loaded->ptr() == TypePtr::BotPTR ) { return TypeInstPtr::BOTTOM; } |
2915 else if (loaded->ptr() == TypePtr::Constant || loaded->ptr() == TypePtr::NotNull) { | |
2916 if (unloaded->ptr() == TypePtr::BotPTR ) { return TypeInstPtr::BOTTOM; } | |
2917 else { return TypeInstPtr::NOTNULL; } | |
2918 } | |
2919 else if( unloaded->ptr() == TypePtr::TopPTR ) { return unloaded; } | |
2920 | |
2921 return unloaded->cast_to_ptr_type(TypePtr::AnyNull)->is_instptr(); | |
2922 } | |
2923 | |
2924 // Both are unloaded, not the same class, not Object | |
2925 // Or meet unloaded with a different loaded class, not java/lang/Object | |
2926 if( ptr != TypePtr::BotPTR ) { | |
2927 return TypeInstPtr::NOTNULL; | |
2928 } | |
2929 return TypeInstPtr::BOTTOM; | |
2930 } | |
2931 | |
2932 | |
2933 //------------------------------meet------------------------------------------- | |
2934 // Compute the MEET of two types. It returns a new Type object. | |
2935 const Type *TypeInstPtr::xmeet( const Type *t ) const { | |
2936 // Perform a fast test for common case; meeting the same types together. | |
2937 if( this == t ) return this; // Meeting same type-rep? | |
2938 | |
2939 // Current "this->_base" is Pointer | |
2940 switch (t->base()) { // switch on original type | |
2941 | |
2942 case Int: // Mixing ints & oops happens when javac | |
2943 case Long: // reuses local variables | |
2944 case FloatTop: | |
2945 case FloatCon: | |
2946 case FloatBot: | |
2947 case DoubleTop: | |
2948 case DoubleCon: | |
2949 case DoubleBot: | |
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2950 case NarrowOop: |
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2951 case NarrowKlass: |
0 | 2952 case Bottom: // Ye Olde Default |
2953 return Type::BOTTOM; | |
2954 case Top: | |
2955 return this; | |
2956 | |
2957 default: // All else is a mistake | |
2958 typerr(t); | |
2959 | |
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2960 case MetadataPtr: |
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2961 case KlassPtr: |
0 | 2962 case RawPtr: return TypePtr::BOTTOM; |
2963 | |
2964 case AryPtr: { // All arrays inherit from Object class | |
2965 const TypeAryPtr *tp = t->is_aryptr(); | |
2966 int offset = meet_offset(tp->offset()); | |
2967 PTR ptr = meet_ptr(tp->ptr()); | |
223 | 2968 int instance_id = meet_instance_id(tp->instance_id()); |
0 | 2969 switch (ptr) { |
2970 case TopPTR: | |
2971 case AnyNull: // Fall 'down' to dual of object klass | |
2972 if (klass()->equals(ciEnv::current()->Object_klass())) { | |
223 | 2973 return TypeAryPtr::make(ptr, tp->ary(), tp->klass(), tp->klass_is_exact(), offset, instance_id); |
0 | 2974 } else { |
2975 // cannot subclass, so the meet has to fall badly below the centerline | |
2976 ptr = NotNull; | |
223 | 2977 instance_id = InstanceBot; |
2978 return TypeInstPtr::make( ptr, ciEnv::current()->Object_klass(), false, NULL, offset, instance_id); | |
0 | 2979 } |
2980 case Constant: | |
2981 case NotNull: | |
2982 case BotPTR: // Fall down to object klass | |
2983 // LCA is object_klass, but if we subclass from the top we can do better | |
2984 if( above_centerline(_ptr) ) { // if( _ptr == TopPTR || _ptr == AnyNull ) | |
2985 // If 'this' (InstPtr) is above the centerline and it is Object class | |
605 | 2986 // then we can subclass in the Java class hierarchy. |
0 | 2987 if (klass()->equals(ciEnv::current()->Object_klass())) { |
2988 // that is, tp's array type is a subtype of my klass | |
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2989 return TypeAryPtr::make(ptr, (ptr == Constant ? tp->const_oop() : NULL), |
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2990 tp->ary(), tp->klass(), tp->klass_is_exact(), offset, instance_id); |
0 | 2991 } |
2992 } | |
2993 // The other case cannot happen, since I cannot be a subtype of an array. | |
2994 // The meet falls down to Object class below centerline. | |
2995 if( ptr == Constant ) | |
2996 ptr = NotNull; | |
223 | 2997 instance_id = InstanceBot; |
2998 return make( ptr, ciEnv::current()->Object_klass(), false, NULL, offset, instance_id ); | |
0 | 2999 default: typerr(t); |
3000 } | |
3001 } | |
3002 | |
3003 case OopPtr: { // Meeting to OopPtrs | |
3004 // Found a OopPtr type vs self-InstPtr type | |
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3005 const TypeOopPtr *tp = t->is_oopptr(); |
0 | 3006 int offset = meet_offset(tp->offset()); |
3007 PTR ptr = meet_ptr(tp->ptr()); | |
3008 switch (tp->ptr()) { | |
3009 case TopPTR: | |
223 | 3010 case AnyNull: { |
3011 int instance_id = meet_instance_id(InstanceTop); | |
0 | 3012 return make(ptr, klass(), klass_is_exact(), |
223 | 3013 (ptr == Constant ? const_oop() : NULL), offset, instance_id); |
3014 } | |
0 | 3015 case NotNull: |
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3016 case BotPTR: { |
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3017 int instance_id = meet_instance_id(tp->instance_id()); |
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3018 return TypeOopPtr::make(ptr, offset, instance_id); |
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3019 } |
0 | 3020 default: typerr(t); |
3021 } | |
3022 } | |
3023 | |
3024 case AnyPtr: { // Meeting to AnyPtrs | |
3025 // Found an AnyPtr type vs self-InstPtr type | |
3026 const TypePtr *tp = t->is_ptr(); | |
3027 int offset = meet_offset(tp->offset()); | |
3028 PTR ptr = meet_ptr(tp->ptr()); | |
3029 switch (tp->ptr()) { | |
3030 case Null: | |
3031 if( ptr == Null ) return TypePtr::make( AnyPtr, ptr, offset ); | |
223 | 3032 // else fall through to AnyNull |
0 | 3033 case TopPTR: |
223 | 3034 case AnyNull: { |
3035 int instance_id = meet_instance_id(InstanceTop); | |
0 | 3036 return make( ptr, klass(), klass_is_exact(), |
223 | 3037 (ptr == Constant ? const_oop() : NULL), offset, instance_id); |
3038 } | |
0 | 3039 case NotNull: |
3040 case BotPTR: | |
3041 return TypePtr::make( AnyPtr, ptr, offset ); | |
3042 default: typerr(t); | |
3043 } | |
3044 } | |
3045 | |
3046 /* | |
3047 A-top } | |
3048 / | \ } Tops | |
3049 B-top A-any C-top } | |
3050 | / | \ | } Any-nulls | |
3051 B-any | C-any } | |
3052 | | | | |
3053 B-con A-con C-con } constants; not comparable across classes | |
3054 | | | | |
3055 B-not | C-not } | |
3056 | \ | / | } not-nulls | |
3057 B-bot A-not C-bot } | |
3058 \ | / } Bottoms | |
3059 A-bot } | |
3060 */ | |
3061 | |
3062 case InstPtr: { // Meeting 2 Oops? | |
3063 // Found an InstPtr sub-type vs self-InstPtr type | |
3064 const TypeInstPtr *tinst = t->is_instptr(); | |
3065 int off = meet_offset( tinst->offset() ); | |
3066 PTR ptr = meet_ptr( tinst->ptr() ); | |
223 | 3067 int instance_id = meet_instance_id(tinst->instance_id()); |
0 | 3068 |
3069 // Check for easy case; klasses are equal (and perhaps not loaded!) | |
3070 // If we have constants, then we created oops so classes are loaded | |
3071 // and we can handle the constants further down. This case handles | |
3072 // both-not-loaded or both-loaded classes | |
3073 if (ptr != Constant && klass()->equals(tinst->klass()) && klass_is_exact() == tinst->klass_is_exact()) { | |
3074 return make( ptr, klass(), klass_is_exact(), NULL, off, instance_id ); | |
3075 } | |
3076 | |
3077 // Classes require inspection in the Java klass hierarchy. Must be loaded. | |
3078 ciKlass* tinst_klass = tinst->klass(); | |
3079 ciKlass* this_klass = this->klass(); | |
3080 bool tinst_xk = tinst->klass_is_exact(); | |
3081 bool this_xk = this->klass_is_exact(); | |
3082 if (!tinst_klass->is_loaded() || !this_klass->is_loaded() ) { | |
3083 // One of these classes has not been loaded | |
3084 const TypeInstPtr *unloaded_meet = xmeet_unloaded(tinst); | |
3085 #ifndef PRODUCT | |
3086 if( PrintOpto && Verbose ) { | |
3087 tty->print("meet of unloaded classes resulted in: "); unloaded_meet->dump(); tty->cr(); | |
3088 tty->print(" this == "); this->dump(); tty->cr(); | |
3089 tty->print(" tinst == "); tinst->dump(); tty->cr(); | |
3090 } | |
3091 #endif | |
3092 return unloaded_meet; | |
3093 } | |
3094 | |
3095 // Handle mixing oops and interfaces first. | |
3096 if( this_klass->is_interface() && !tinst_klass->is_interface() ) { | |
3097 ciKlass *tmp = tinst_klass; // Swap interface around | |
3098 tinst_klass = this_klass; | |
3099 this_klass = tmp; | |
3100 bool tmp2 = tinst_xk; | |
3101 tinst_xk = this_xk; | |
3102 this_xk = tmp2; | |
3103 } | |
3104 if (tinst_klass->is_interface() && | |
3105 !(this_klass->is_interface() || | |
3106 // Treat java/lang/Object as an honorary interface, | |
3107 // because we need a bottom for the interface hierarchy. | |
3108 this_klass == ciEnv::current()->Object_klass())) { | |
3109 // Oop meets interface! | |
3110 | |
3111 // See if the oop subtypes (implements) interface. | |
3112 ciKlass *k; | |
3113 bool xk; | |
3114 if( this_klass->is_subtype_of( tinst_klass ) ) { | |
3115 // Oop indeed subtypes. Now keep oop or interface depending | |
3116 // on whether we are both above the centerline or either is | |
3117 // below the centerline. If we are on the centerline | |
3118 // (e.g., Constant vs. AnyNull interface), use the constant. | |
3119 k = below_centerline(ptr) ? tinst_klass : this_klass; | |
3120 // If we are keeping this_klass, keep its exactness too. | |
3121 xk = below_centerline(ptr) ? tinst_xk : this_xk; | |
3122 } else { // Does not implement, fall to Object | |
3123 // Oop does not implement interface, so mixing falls to Object | |
3124 // just like the verifier does (if both are above the | |
3125 // centerline fall to interface) | |
3126 k = above_centerline(ptr) ? tinst_klass : ciEnv::current()->Object_klass(); | |
3127 xk = above_centerline(ptr) ? tinst_xk : false; | |
3128 // Watch out for Constant vs. AnyNull interface. | |
3129 if (ptr == Constant) ptr = NotNull; // forget it was a constant | |
247 | 3130 instance_id = InstanceBot; |
0 | 3131 } |
3132 ciObject* o = NULL; // the Constant value, if any | |
3133 if (ptr == Constant) { | |
3134 // Find out which constant. | |
3135 o = (this_klass == klass()) ? const_oop() : tinst->const_oop(); | |
3136 } | |
223 | 3137 return make( ptr, k, xk, o, off, instance_id ); |
0 | 3138 } |
3139 | |
3140 // Either oop vs oop or interface vs interface or interface vs Object | |
3141 | |
3142 // !!! Here's how the symmetry requirement breaks down into invariants: | |
3143 // If we split one up & one down AND they subtype, take the down man. | |
3144 // If we split one up & one down AND they do NOT subtype, "fall hard". | |
3145 // If both are up and they subtype, take the subtype class. | |
3146 // If both are up and they do NOT subtype, "fall hard". | |
3147 // If both are down and they subtype, take the supertype class. | |
3148 // If both are down and they do NOT subtype, "fall hard". | |
3149 // Constants treated as down. | |
3150 | |
3151 // Now, reorder the above list; observe that both-down+subtype is also | |
3152 // "fall hard"; "fall hard" becomes the default case: | |
3153 // If we split one up & one down AND they subtype, take the down man. | |
3154 // If both are up and they subtype, take the subtype class. | |
3155 | |
3156 // If both are down and they subtype, "fall hard". | |
3157 // If both are down and they do NOT subtype, "fall hard". | |
3158 // If both are up and they do NOT subtype, "fall hard". | |
3159 // If we split one up & one down AND they do NOT subtype, "fall hard". | |
3160 | |
3161 // If a proper subtype is exact, and we return it, we return it exactly. | |
3162 // If a proper supertype is exact, there can be no subtyping relationship! | |
3163 // If both types are equal to the subtype, exactness is and-ed below the | |
3164 // centerline and or-ed above it. (N.B. Constants are always exact.) | |
3165 | |
3166 // Check for subtyping: | |
3167 ciKlass *subtype = NULL; | |
3168 bool subtype_exact = false; | |
3169 if( tinst_klass->equals(this_klass) ) { | |
3170 subtype = this_klass; | |
3171 subtype_exact = below_centerline(ptr) ? (this_xk & tinst_xk) : (this_xk | tinst_xk); | |
3172 } else if( !tinst_xk && this_klass->is_subtype_of( tinst_klass ) ) { | |
3173 subtype = this_klass; // Pick subtyping class | |
3174 subtype_exact = this_xk; | |
3175 } else if( !this_xk && tinst_klass->is_subtype_of( this_klass ) ) { | |
3176 subtype = tinst_klass; // Pick subtyping class | |
3177 subtype_exact = tinst_xk; | |
3178 } | |
3179 | |
3180 if( subtype ) { | |
3181 if( above_centerline(ptr) ) { // both are up? | |
3182 this_klass = tinst_klass = subtype; | |
3183 this_xk = tinst_xk = subtype_exact; | |
3184 } else if( above_centerline(this ->_ptr) && !above_centerline(tinst->_ptr) ) { | |
3185 this_klass = tinst_klass; // tinst is down; keep down man | |
3186 this_xk = tinst_xk; | |
3187 } else if( above_centerline(tinst->_ptr) && !above_centerline(this ->_ptr) ) { | |
3188 tinst_klass = this_klass; // this is down; keep down man | |
3189 tinst_xk = this_xk; | |
3190 } else { | |
3191 this_xk = subtype_exact; // either they are equal, or we'll do an LCA | |
3192 } | |
3193 } | |
3194 | |
3195 // Check for classes now being equal | |
3196 if (tinst_klass->equals(this_klass)) { | |
3197 // If the klasses are equal, the constants may still differ. Fall to | |
3198 // NotNull if they do (neither constant is NULL; that is a special case | |
3199 // handled elsewhere). | |
3200 ciObject* o = NULL; // Assume not constant when done | |
3201 ciObject* this_oop = const_oop(); | |
3202 ciObject* tinst_oop = tinst->const_oop(); | |
3203 if( ptr == Constant ) { | |
3204 if (this_oop != NULL && tinst_oop != NULL && | |
3205 this_oop->equals(tinst_oop) ) | |
3206 o = this_oop; | |
3207 else if (above_centerline(this ->_ptr)) | |
3208 o = tinst_oop; | |
3209 else if (above_centerline(tinst ->_ptr)) | |
3210 o = this_oop; | |
3211 else | |
3212 ptr = NotNull; | |
3213 } | |
3214 return make( ptr, this_klass, this_xk, o, off, instance_id ); | |
3215 } // Else classes are not equal | |
3216 | |
3217 // Since klasses are different, we require a LCA in the Java | |
3218 // class hierarchy - which means we have to fall to at least NotNull. | |
3219 if( ptr == TopPTR || ptr == AnyNull || ptr == Constant ) | |
3220 ptr = NotNull; | |
247 | 3221 instance_id = InstanceBot; |
0 | 3222 |
3223 // Now we find the LCA of Java classes | |
3224 ciKlass* k = this_klass->least_common_ancestor(tinst_klass); | |
223 | 3225 return make( ptr, k, false, NULL, off, instance_id ); |
0 | 3226 } // End of case InstPtr |
3227 | |
3228 } // End of switch | |
3229 return this; // Return the double constant | |
3230 } | |
3231 | |
3232 | |
3233 //------------------------java_mirror_type-------------------------------------- | |
3234 ciType* TypeInstPtr::java_mirror_type() const { | |
3235 // must be a singleton type | |
3236 if( const_oop() == NULL ) return NULL; | |
3237 | |
3238 // must be of type java.lang.Class | |
3239 if( klass() != ciEnv::current()->Class_klass() ) return NULL; | |
3240 | |
3241 return const_oop()->as_instance()->java_mirror_type(); | |
3242 } | |
3243 | |
3244 | |
3245 //------------------------------xdual------------------------------------------ | |
3246 // Dual: do NOT dual on klasses. This means I do NOT understand the Java | |
605 | 3247 // inheritance mechanism. |
0 | 3248 const Type *TypeInstPtr::xdual() const { |
223 | 3249 return new TypeInstPtr( dual_ptr(), klass(), klass_is_exact(), const_oop(), dual_offset(), dual_instance_id() ); |
0 | 3250 } |
3251 | |
3252 //------------------------------eq--------------------------------------------- | |
3253 // Structural equality check for Type representations | |
3254 bool TypeInstPtr::eq( const Type *t ) const { | |
3255 const TypeInstPtr *p = t->is_instptr(); | |
3256 return | |
3257 klass()->equals(p->klass()) && | |
3258 TypeOopPtr::eq(p); // Check sub-type stuff | |
3259 } | |
3260 | |
3261 //------------------------------hash------------------------------------------- | |
3262 // Type-specific hashing function. | |
3263 int TypeInstPtr::hash(void) const { | |
3264 int hash = klass()->hash() + TypeOopPtr::hash(); | |
3265 return hash; | |
3266 } | |
3267 | |
3268 //------------------------------dump2------------------------------------------ | |
3269 // Dump oop Type | |
3270 #ifndef PRODUCT | |
3271 void TypeInstPtr::dump2( Dict &d, uint depth, outputStream *st ) const { | |
3272 // Print the name of the klass. | |
3273 klass()->print_name_on(st); | |
3274 | |
3275 switch( _ptr ) { | |
3276 case Constant: | |
3277 // TO DO: Make CI print the hex address of the underlying oop. | |
3278 if (WizardMode || Verbose) { | |
3279 const_oop()->print_oop(st); | |
3280 } | |
3281 case BotPTR: | |
3282 if (!WizardMode && !Verbose) { | |
3283 if( _klass_is_exact ) st->print(":exact"); | |
3284 break; | |
3285 } | |
3286 case TopPTR: | |
3287 case AnyNull: | |
3288 case NotNull: | |
3289 st->print(":%s", ptr_msg[_ptr]); | |
3290 if( _klass_is_exact ) st->print(":exact"); | |
3291 break; | |
3292 } | |
3293 | |
3294 if( _offset ) { // Dump offset, if any | |
3295 if( _offset == OffsetBot ) st->print("+any"); | |
3296 else if( _offset == OffsetTop ) st->print("+unknown"); | |
3297 else st->print("+%d", _offset); | |
3298 } | |
3299 | |
3300 st->print(" *"); | |
223 | 3301 if (_instance_id == InstanceTop) |
3302 st->print(",iid=top"); | |
3303 else if (_instance_id != InstanceBot) | |
0 | 3304 st->print(",iid=%d",_instance_id); |
3305 } | |
3306 #endif | |
3307 | |
3308 //------------------------------add_offset------------------------------------- | |
306
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3309 const TypePtr *TypeInstPtr::add_offset( intptr_t offset ) const { |
0 | 3310 return make( _ptr, klass(), klass_is_exact(), const_oop(), xadd_offset(offset), _instance_id ); |
3311 } | |
3312 | |
3313 //============================================================================= | |
3314 // Convenience common pre-built types. | |
3315 const TypeAryPtr *TypeAryPtr::RANGE; | |
3316 const TypeAryPtr *TypeAryPtr::OOPS; | |
163 | 3317 const TypeAryPtr *TypeAryPtr::NARROWOOPS; |
0 | 3318 const TypeAryPtr *TypeAryPtr::BYTES; |
3319 const TypeAryPtr *TypeAryPtr::SHORTS; | |
3320 const TypeAryPtr *TypeAryPtr::CHARS; | |
3321 const TypeAryPtr *TypeAryPtr::INTS; | |
3322 const TypeAryPtr *TypeAryPtr::LONGS; | |
3323 const TypeAryPtr *TypeAryPtr::FLOATS; | |
3324 const TypeAryPtr *TypeAryPtr::DOUBLES; | |
3325 | |
3326 //------------------------------make------------------------------------------- | |
3327 const TypeAryPtr *TypeAryPtr::make( PTR ptr, const TypeAry *ary, ciKlass* k, bool xk, int offset, int instance_id ) { | |
3328 assert(!(k == NULL && ary->_elem->isa_int()), | |
3329 "integral arrays must be pre-equipped with a class"); | |
3330 if (!xk) xk = ary->ary_must_be_exact(); | |
247 | 3331 assert(instance_id <= 0 || xk || !UseExactTypes, "instances are always exactly typed"); |
0 | 3332 if (!UseExactTypes) xk = (ptr == Constant); |
3333 return (TypeAryPtr*)(new TypeAryPtr(ptr, NULL, ary, k, xk, offset, instance_id))->hashcons(); | |
3334 } | |
3335 | |
3336 //------------------------------make------------------------------------------- | |
3337 const TypeAryPtr *TypeAryPtr::make( PTR ptr, ciObject* o, const TypeAry *ary, ciKlass* k, bool xk, int offset, int instance_id ) { | |
3338 assert(!(k == NULL && ary->_elem->isa_int()), | |
3339 "integral arrays must be pre-equipped with a class"); | |
3340 assert( (ptr==Constant && o) || (ptr!=Constant && !o), "" ); | |
3341 if (!xk) xk = (o != NULL) || ary->ary_must_be_exact(); | |
247 | 3342 assert(instance_id <= 0 || xk || !UseExactTypes, "instances are always exactly typed"); |
0 | 3343 if (!UseExactTypes) xk = (ptr == Constant); |
3344 return (TypeAryPtr*)(new TypeAryPtr(ptr, o, ary, k, xk, offset, instance_id))->hashcons(); | |
3345 } | |
3346 | |
3347 //------------------------------cast_to_ptr_type------------------------------- | |
3348 const Type *TypeAryPtr::cast_to_ptr_type(PTR ptr) const { | |
3349 if( ptr == _ptr ) return this; | |
223 | 3350 return make(ptr, const_oop(), _ary, klass(), klass_is_exact(), _offset, _instance_id); |
0 | 3351 } |
3352 | |
3353 | |
3354 //-----------------------------cast_to_exactness------------------------------- | |
3355 const Type *TypeAryPtr::cast_to_exactness(bool klass_is_exact) const { | |
3356 if( klass_is_exact == _klass_is_exact ) return this; | |
3357 if (!UseExactTypes) return this; | |
3358 if (_ary->ary_must_be_exact()) return this; // cannot clear xk | |
3359 return make(ptr(), const_oop(), _ary, klass(), klass_is_exact, _offset, _instance_id); | |
3360 } | |
3361 | |
247 | 3362 //-----------------------------cast_to_instance_id---------------------------- |
223 | 3363 const TypeOopPtr *TypeAryPtr::cast_to_instance_id(int instance_id) const { |
3364 if( instance_id == _instance_id ) return this; | |
247 | 3365 return make(_ptr, const_oop(), _ary, klass(), _klass_is_exact, _offset, instance_id); |
0 | 3366 } |
3367 | |
3368 //-----------------------------narrow_size_type------------------------------- | |
3369 // Local cache for arrayOopDesc::max_array_length(etype), | |
3370 // which is kind of slow (and cached elsewhere by other users). | |
3371 static jint max_array_length_cache[T_CONFLICT+1]; | |
3372 static jint max_array_length(BasicType etype) { | |
3373 jint& cache = max_array_length_cache[etype]; | |
3374 jint res = cache; | |
3375 if (res == 0) { | |
3376 switch (etype) { | |
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3377 case T_NARROWOOP: |
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3378 etype = T_OBJECT; |
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3379 break; |
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3380 case T_NARROWKLASS: |
0 | 3381 case T_CONFLICT: |
3382 case T_ILLEGAL: | |
3383 case T_VOID: | |
3384 etype = T_BYTE; // will produce conservatively high value | |
3385 } | |
3386 cache = res = arrayOopDesc::max_array_length(etype); | |
3387 } | |
3388 return res; | |
3389 } | |
3390 | |
3391 // Narrow the given size type to the index range for the given array base type. | |
3392 // Return NULL if the resulting int type becomes empty. | |
366
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3393 const TypeInt* TypeAryPtr::narrow_size_type(const TypeInt* size) const { |
0 | 3394 jint hi = size->_hi; |
3395 jint lo = size->_lo; | |
3396 jint min_lo = 0; | |
366
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3397 jint max_hi = max_array_length(elem()->basic_type()); |
0 | 3398 //if (index_not_size) --max_hi; // type of a valid array index, FTR |
3399 bool chg = false; | |
3400 if (lo < min_lo) { lo = min_lo; chg = true; } | |
3401 if (hi > max_hi) { hi = max_hi; chg = true; } | |
605 | 3402 // Negative length arrays will produce weird intermediate dead fast-path code |
0 | 3403 if (lo > hi) |
366
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diff
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|
3404 return TypeInt::ZERO; |
0 | 3405 if (!chg) |
3406 return size; | |
3407 return TypeInt::make(lo, hi, Type::WidenMin); | |
3408 } | |
3409 | |
3410 //-------------------------------cast_to_size---------------------------------- | |
3411 const TypeAryPtr* TypeAryPtr::cast_to_size(const TypeInt* new_size) const { | |
3412 assert(new_size != NULL, ""); | |
366
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3413 new_size = narrow_size_type(new_size); |
0 | 3414 if (new_size == size()) return this; |
3415 const TypeAry* new_ary = TypeAry::make(elem(), new_size); | |
223 | 3416 return make(ptr(), const_oop(), new_ary, klass(), klass_is_exact(), _offset, _instance_id); |
0 | 3417 } |
3418 | |
3419 | |
3420 //------------------------------eq--------------------------------------------- | |
3421 // Structural equality check for Type representations | |
3422 bool TypeAryPtr::eq( const Type *t ) const { | |
3423 const TypeAryPtr *p = t->is_aryptr(); | |
3424 return | |
3425 _ary == p->_ary && // Check array | |
3426 TypeOopPtr::eq(p); // Check sub-parts | |
3427 } | |
3428 | |
3429 //------------------------------hash------------------------------------------- | |
3430 // Type-specific hashing function. | |
3431 int TypeAryPtr::hash(void) const { | |
3432 return (intptr_t)_ary + TypeOopPtr::hash(); | |
3433 } | |
3434 | |
3435 //------------------------------meet------------------------------------------- | |
3436 // Compute the MEET of two types. It returns a new Type object. | |
3437 const Type *TypeAryPtr::xmeet( const Type *t ) const { | |
3438 // Perform a fast test for common case; meeting the same types together. | |
3439 if( this == t ) return this; // Meeting same type-rep? | |
3440 // Current "this->_base" is Pointer | |
3441 switch (t->base()) { // switch on original type | |
3442 | |
3443 // Mixing ints & oops happens when javac reuses local variables | |
3444 case Int: | |
3445 case Long: | |
3446 case FloatTop: | |
3447 case FloatCon: | |
3448 case FloatBot: | |
3449 case DoubleTop: | |
3450 case DoubleCon: | |
3451 case DoubleBot: | |
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3452 case NarrowOop: |
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|
3453 case NarrowKlass: |
0 | 3454 case Bottom: // Ye Olde Default |
3455 return Type::BOTTOM; | |
3456 case Top: | |
3457 return this; | |
3458 | |
3459 default: // All else is a mistake | |
3460 typerr(t); | |
3461 | |
3462 case OopPtr: { // Meeting to OopPtrs | |
3463 // Found a OopPtr type vs self-AryPtr type | |
958
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3464 const TypeOopPtr *tp = t->is_oopptr(); |
0 | 3465 int offset = meet_offset(tp->offset()); |
3466 PTR ptr = meet_ptr(tp->ptr()); | |
3467 switch (tp->ptr()) { | |
3468 case TopPTR: | |
223 | 3469 case AnyNull: { |
3470 int instance_id = meet_instance_id(InstanceTop); | |
3471 return make(ptr, (ptr == Constant ? const_oop() : NULL), | |
3472 _ary, _klass, _klass_is_exact, offset, instance_id); | |
3473 } | |
0 | 3474 case BotPTR: |
958
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3475 case NotNull: { |
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3476 int instance_id = meet_instance_id(tp->instance_id()); |
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|
3477 return TypeOopPtr::make(ptr, offset, instance_id); |
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|
3478 } |
0 | 3479 default: ShouldNotReachHere(); |
3480 } | |
3481 } | |
3482 | |
3483 case AnyPtr: { // Meeting two AnyPtrs | |
3484 // Found an AnyPtr type vs self-AryPtr type | |
3485 const TypePtr *tp = t->is_ptr(); | |
3486 int offset = meet_offset(tp->offset()); | |
3487 PTR ptr = meet_ptr(tp->ptr()); | |
3488 switch (tp->ptr()) { | |
3489 case TopPTR: | |
3490 return this; | |
3491 case BotPTR: | |
3492 case NotNull: | |
3493 return TypePtr::make(AnyPtr, ptr, offset); | |
3494 case Null: | |
3495 if( ptr == Null ) return TypePtr::make(AnyPtr, ptr, offset); | |
223 | 3496 // else fall through to AnyNull |
3497 case AnyNull: { | |
3498 int instance_id = meet_instance_id(InstanceTop); | |
3499 return make( ptr, (ptr == Constant ? const_oop() : NULL), | |
3500 _ary, _klass, _klass_is_exact, offset, instance_id); | |
3501 } | |
0 | 3502 default: ShouldNotReachHere(); |
3503 } | |
3504 } | |
3505 | |
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3506 case MetadataPtr: |
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3507 case KlassPtr: |
0 | 3508 case RawPtr: return TypePtr::BOTTOM; |
3509 | |
3510 case AryPtr: { // Meeting 2 references? | |
3511 const TypeAryPtr *tap = t->is_aryptr(); | |
3512 int off = meet_offset(tap->offset()); | |
3513 const TypeAry *tary = _ary->meet(tap->_ary)->is_ary(); | |
3514 PTR ptr = meet_ptr(tap->ptr()); | |
223 | 3515 int instance_id = meet_instance_id(tap->instance_id()); |
0 | 3516 ciKlass* lazy_klass = NULL; |
3517 if (tary->_elem->isa_int()) { | |
3518 // Integral array element types have irrelevant lattice relations. | |
3519 // It is the klass that determines array layout, not the element type. | |
3520 if (_klass == NULL) | |
3521 lazy_klass = tap->_klass; | |
3522 else if (tap->_klass == NULL || tap->_klass == _klass) { | |
3523 lazy_klass = _klass; | |
3524 } else { | |
3525 // Something like byte[int+] meets char[int+]. | |
3526 // This must fall to bottom, not (int[-128..65535])[int+]. | |
247 | 3527 instance_id = InstanceBot; |
0 | 3528 tary = TypeAry::make(Type::BOTTOM, tary->_size); |
3529 } | |
2351 | 3530 } else // Non integral arrays. |
3531 // Must fall to bottom if exact klasses in upper lattice | |
3532 // are not equal or super klass is exact. | |
3533 if ( above_centerline(ptr) && klass() != tap->klass() && | |
3534 // meet with top[] and bottom[] are processed further down: | |
3535 tap ->_klass != NULL && this->_klass != NULL && | |
3536 // both are exact and not equal: | |
3537 ((tap ->_klass_is_exact && this->_klass_is_exact) || | |
3538 // 'tap' is exact and super or unrelated: | |
3539 (tap ->_klass_is_exact && !tap->klass()->is_subtype_of(klass())) || | |
3540 // 'this' is exact and super or unrelated: | |
3541 (this->_klass_is_exact && !klass()->is_subtype_of(tap->klass())))) { | |
3542 tary = TypeAry::make(Type::BOTTOM, tary->_size); | |
3543 return make( NotNull, NULL, tary, lazy_klass, false, off, InstanceBot ); | |
0 | 3544 } |
2351 | 3545 |
1765
114e6b93e9e1
6980978: assert(mt == t->xmeet(this)) failed: meet not commutative
kvn
parents:
1761
diff
changeset
|
3546 bool xk = false; |
0 | 3547 switch (tap->ptr()) { |
3548 case AnyNull: | |
3549 case TopPTR: | |
3550 // Compute new klass on demand, do not use tap->_klass | |
3551 xk = (tap->_klass_is_exact | this->_klass_is_exact); | |
223 | 3552 return make( ptr, const_oop(), tary, lazy_klass, xk, off, instance_id ); |
0 | 3553 case Constant: { |
3554 ciObject* o = const_oop(); | |
3555 if( _ptr == Constant ) { | |
3556 if( tap->const_oop() != NULL && !o->equals(tap->const_oop()) ) { | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
958
diff
changeset
|
3557 xk = (klass() == tap->klass()); |
0 | 3558 ptr = NotNull; |
3559 o = NULL; | |
247 | 3560 instance_id = InstanceBot; |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
958
diff
changeset
|
3561 } else { |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
958
diff
changeset
|
3562 xk = true; |
0 | 3563 } |
3564 } else if( above_centerline(_ptr) ) { | |
3565 o = tap->const_oop(); | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
958
diff
changeset
|
3566 xk = true; |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
958
diff
changeset
|
3567 } else { |
1765
114e6b93e9e1
6980978: assert(mt == t->xmeet(this)) failed: meet not commutative
kvn
parents:
1761
diff
changeset
|
3568 // Only precise for identical arrays |
114e6b93e9e1
6980978: assert(mt == t->xmeet(this)) failed: meet not commutative
kvn
parents:
1761
diff
changeset
|
3569 xk = this->_klass_is_exact && (klass() == tap->klass()); |
0 | 3570 } |
1765
114e6b93e9e1
6980978: assert(mt == t->xmeet(this)) failed: meet not commutative
kvn
parents:
1761
diff
changeset
|
3571 return TypeAryPtr::make( ptr, o, tary, lazy_klass, xk, off, instance_id ); |
0 | 3572 } |
3573 case NotNull: | |
3574 case BotPTR: | |
3575 // Compute new klass on demand, do not use tap->_klass | |
3576 if (above_centerline(this->_ptr)) | |
3577 xk = tap->_klass_is_exact; | |
3578 else if (above_centerline(tap->_ptr)) | |
3579 xk = this->_klass_is_exact; | |
3580 else xk = (tap->_klass_is_exact & this->_klass_is_exact) && | |
3581 (klass() == tap->klass()); // Only precise for identical arrays | |
223 | 3582 return TypeAryPtr::make( ptr, NULL, tary, lazy_klass, xk, off, instance_id ); |
0 | 3583 default: ShouldNotReachHere(); |
3584 } | |
3585 } | |
3586 | |
3587 // All arrays inherit from Object class | |
3588 case InstPtr: { | |
3589 const TypeInstPtr *tp = t->is_instptr(); | |
3590 int offset = meet_offset(tp->offset()); | |
3591 PTR ptr = meet_ptr(tp->ptr()); | |
223 | 3592 int instance_id = meet_instance_id(tp->instance_id()); |
0 | 3593 switch (ptr) { |
3594 case TopPTR: | |
3595 case AnyNull: // Fall 'down' to dual of object klass | |
3596 if( tp->klass()->equals(ciEnv::current()->Object_klass()) ) { | |
223 | 3597 return TypeAryPtr::make( ptr, _ary, _klass, _klass_is_exact, offset, instance_id ); |
0 | 3598 } else { |
3599 // cannot subclass, so the meet has to fall badly below the centerline | |
3600 ptr = NotNull; | |
223 | 3601 instance_id = InstanceBot; |
3602 return TypeInstPtr::make( ptr, ciEnv::current()->Object_klass(), false, NULL,offset, instance_id); | |
0 | 3603 } |
3604 case Constant: | |
3605 case NotNull: | |
3606 case BotPTR: // Fall down to object klass | |
3607 // LCA is object_klass, but if we subclass from the top we can do better | |
3608 if (above_centerline(tp->ptr())) { | |
3609 // If 'tp' is above the centerline and it is Object class | |
605 | 3610 // then we can subclass in the Java class hierarchy. |
0 | 3611 if( tp->klass()->equals(ciEnv::current()->Object_klass()) ) { |
3612 // that is, my array type is a subtype of 'tp' klass | |
1279
2432acbee618
6930035: C2 type system incorrectly handles case j.l.Object->meet(constant AryPtr)
kvn
parents:
1137
diff
changeset
|
3613 return make( ptr, (ptr == Constant ? const_oop() : NULL), |
2432acbee618
6930035: C2 type system incorrectly handles case j.l.Object->meet(constant AryPtr)
kvn
parents:
1137
diff
changeset
|
3614 _ary, _klass, _klass_is_exact, offset, instance_id ); |
0 | 3615 } |
3616 } | |
3617 // The other case cannot happen, since t cannot be a subtype of an array. | |
3618 // The meet falls down to Object class below centerline. | |
3619 if( ptr == Constant ) | |
3620 ptr = NotNull; | |
223 | 3621 instance_id = InstanceBot; |
3622 return TypeInstPtr::make( ptr, ciEnv::current()->Object_klass(), false, NULL,offset, instance_id); | |
0 | 3623 default: typerr(t); |
3624 } | |
3625 } | |
3626 } | |
3627 return this; // Lint noise | |
3628 } | |
3629 | |
3630 //------------------------------xdual------------------------------------------ | |
3631 // Dual: compute field-by-field dual | |
3632 const Type *TypeAryPtr::xdual() const { | |
223 | 3633 return new TypeAryPtr( dual_ptr(), _const_oop, _ary->dual()->is_ary(),_klass, _klass_is_exact, dual_offset(), dual_instance_id() ); |
0 | 3634 } |
3635 | |
820
915cc9c5ebc6
6837094: False positive for "meet not symmetric" failure
kvn
parents:
628
diff
changeset
|
3636 //----------------------interface_vs_oop--------------------------------------- |
915cc9c5ebc6
6837094: False positive for "meet not symmetric" failure
kvn
parents:
628
diff
changeset
|
3637 #ifdef ASSERT |
915cc9c5ebc6
6837094: False positive for "meet not symmetric" failure
kvn
parents:
628
diff
changeset
|
3638 bool TypeAryPtr::interface_vs_oop(const Type *t) const { |
915cc9c5ebc6
6837094: False positive for "meet not symmetric" failure
kvn
parents:
628
diff
changeset
|
3639 const TypeAryPtr* t_aryptr = t->isa_aryptr(); |
915cc9c5ebc6
6837094: False positive for "meet not symmetric" failure
kvn
parents:
628
diff
changeset
|
3640 if (t_aryptr) { |
915cc9c5ebc6
6837094: False positive for "meet not symmetric" failure
kvn
parents:
628
diff
changeset
|
3641 return _ary->interface_vs_oop(t_aryptr->_ary); |
915cc9c5ebc6
6837094: False positive for "meet not symmetric" failure
kvn
parents:
628
diff
changeset
|
3642 } |
915cc9c5ebc6
6837094: False positive for "meet not symmetric" failure
kvn
parents:
628
diff
changeset
|
3643 return false; |
915cc9c5ebc6
6837094: False positive for "meet not symmetric" failure
kvn
parents:
628
diff
changeset
|
3644 } |
915cc9c5ebc6
6837094: False positive for "meet not symmetric" failure
kvn
parents:
628
diff
changeset
|
3645 #endif |
915cc9c5ebc6
6837094: False positive for "meet not symmetric" failure
kvn
parents:
628
diff
changeset
|
3646 |
0 | 3647 //------------------------------dump2------------------------------------------ |
3648 #ifndef PRODUCT | |
3649 void TypeAryPtr::dump2( Dict &d, uint depth, outputStream *st ) const { | |
3650 _ary->dump2(d,depth,st); | |
3651 switch( _ptr ) { | |
3652 case Constant: | |
3653 const_oop()->print(st); | |
3654 break; | |
3655 case BotPTR: | |
3656 if (!WizardMode && !Verbose) { | |
3657 if( _klass_is_exact ) st->print(":exact"); | |
3658 break; | |
3659 } | |
3660 case TopPTR: | |
3661 case AnyNull: | |
3662 case NotNull: | |
3663 st->print(":%s", ptr_msg[_ptr]); | |
3664 if( _klass_is_exact ) st->print(":exact"); | |
3665 break; | |
3666 } | |
3667 | |
64
b8f5ba577b02
6673473: (Escape Analysis) Add the instance's field information to PhiNode
kvn
parents:
0
diff
changeset
|
3668 if( _offset != 0 ) { |
b8f5ba577b02
6673473: (Escape Analysis) Add the instance's field information to PhiNode
kvn
parents:
0
diff
changeset
|
3669 int header_size = objArrayOopDesc::header_size() * wordSize; |
b8f5ba577b02
6673473: (Escape Analysis) Add the instance's field information to PhiNode
kvn
parents:
0
diff
changeset
|
3670 if( _offset == OffsetTop ) st->print("+undefined"); |
b8f5ba577b02
6673473: (Escape Analysis) Add the instance's field information to PhiNode
kvn
parents:
0
diff
changeset
|
3671 else if( _offset == OffsetBot ) st->print("+any"); |
b8f5ba577b02
6673473: (Escape Analysis) Add the instance's field information to PhiNode
kvn
parents:
0
diff
changeset
|
3672 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
|
3673 else { |
b8f5ba577b02
6673473: (Escape Analysis) Add the instance's field information to PhiNode
kvn
parents:
0
diff
changeset
|
3674 BasicType basic_elem_type = elem()->basic_type(); |
b8f5ba577b02
6673473: (Escape Analysis) Add the instance's field information to PhiNode
kvn
parents:
0
diff
changeset
|
3675 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
|
3676 int elem_size = type2aelembytes(basic_elem_type); |
b8f5ba577b02
6673473: (Escape Analysis) Add the instance's field information to PhiNode
kvn
parents:
0
diff
changeset
|
3677 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
|
3678 } |
b8f5ba577b02
6673473: (Escape Analysis) Add the instance's field information to PhiNode
kvn
parents:
0
diff
changeset
|
3679 } |
b8f5ba577b02
6673473: (Escape Analysis) Add the instance's field information to PhiNode
kvn
parents:
0
diff
changeset
|
3680 st->print(" *"); |
223 | 3681 if (_instance_id == InstanceTop) |
3682 st->print(",iid=top"); | |
3683 else if (_instance_id != InstanceBot) | |
0 | 3684 st->print(",iid=%d",_instance_id); |
3685 } | |
3686 #endif | |
3687 | |
3688 bool TypeAryPtr::empty(void) const { | |
3689 if (_ary->empty()) return true; | |
3690 return TypeOopPtr::empty(); | |
3691 } | |
3692 | |
3693 //------------------------------add_offset------------------------------------- | |
306
af945ba2e739
6741738: TypePtr::add_offset() set incorrect offset when the add overflows
kvn
parents:
293
diff
changeset
|
3694 const TypePtr *TypeAryPtr::add_offset( intptr_t offset ) const { |
0 | 3695 return make( _ptr, _const_oop, _ary, _klass, _klass_is_exact, xadd_offset(offset), _instance_id ); |
3696 } | |
3697 | |
3698 | |
3699 //============================================================================= | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
3700 |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
3701 //------------------------------hash------------------------------------------- |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
3702 // Type-specific hashing function. |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3703 int TypeNarrowPtr::hash(void) const { |
827
bf3489cc0aa0
6856025: assert(_base >= OopPtr && _base <= KlassPtr,"Not a Java pointer")
never
parents:
820
diff
changeset
|
3704 return _ptrtype->hash() + 7; |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
3705 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
3706 |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3707 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
|
3708 return _ptrtype->singleton(); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3709 } |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3710 |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3711 bool TypeNarrowPtr::empty(void) const { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3712 return _ptrtype->empty(); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3713 } |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3714 |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3715 intptr_t TypeNarrowPtr::get_con() const { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3716 return _ptrtype->get_con(); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3717 } |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3718 |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3719 bool TypeNarrowPtr::eq( const Type *t ) const { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3720 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
|
3721 if (tc != NULL) { |
827
bf3489cc0aa0
6856025: assert(_base >= OopPtr && _base <= KlassPtr,"Not a Java pointer")
never
parents:
820
diff
changeset
|
3722 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
|
3723 return false; |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
3724 } |
827
bf3489cc0aa0
6856025: assert(_base >= OopPtr && _base <= KlassPtr,"Not a Java pointer")
never
parents:
820
diff
changeset
|
3725 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
|
3726 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
3727 return false; |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
3728 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
3729 |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3730 const Type *TypeNarrowPtr::xdual() const { // Compute dual right now. |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3731 const TypePtr* odual = _ptrtype->dual()->is_ptr(); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3732 return make_same_narrowptr(odual); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3733 } |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3734 |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3735 |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3736 const Type *TypeNarrowPtr::filter( const Type *kills ) const { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3737 if (isa_same_narrowptr(kills)) { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3738 const Type* ft =_ptrtype->filter(is_same_narrowptr(kills)->_ptrtype); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3739 if (ft->empty()) |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3740 return Type::TOP; // Canonical empty value |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3741 if (ft->isa_ptr()) { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3742 return make_hash_same_narrowptr(ft->isa_ptr()); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3743 } |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3744 return ft; |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3745 } else if (kills->isa_ptr()) { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3746 const Type* ft = _ptrtype->join(kills); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3747 if (ft->empty()) |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3748 return Type::TOP; // Canonical empty value |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3749 return ft; |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3750 } else { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3751 return Type::TOP; |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3752 } |
113
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64
diff
changeset
|
3753 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
3754 |
293
c3e045194476
6731641: assert(m->adr_type() == mach->adr_type(),"matcher should not change adr type")
kvn
parents:
247
diff
changeset
|
3755 //------------------------------xmeet------------------------------------------ |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
3756 // 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
|
3757 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
|
3758 // 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
|
3759 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
|
3760 |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3761 if (t->base() == base()) { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3762 const Type* result = _ptrtype->xmeet(t->make_ptr()); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3763 if (result->isa_ptr()) { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3764 return make_hash_same_narrowptr(result->is_ptr()); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3765 } |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3766 return result; |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3767 } |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3768 |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3769 // 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
|
3770 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
|
3771 |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
3772 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
|
3773 case Long: // reuses local variables |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
3774 case FloatTop: |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
3775 case FloatCon: |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
3776 case FloatBot: |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
3777 case DoubleTop: |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
3778 case DoubleCon: |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
3779 case DoubleBot: |
293
c3e045194476
6731641: assert(m->adr_type() == mach->adr_type(),"matcher should not change adr type")
kvn
parents:
247
diff
changeset
|
3780 case AnyPtr: |
c3e045194476
6731641: assert(m->adr_type() == mach->adr_type(),"matcher should not change adr type")
kvn
parents:
247
diff
changeset
|
3781 case RawPtr: |
c3e045194476
6731641: assert(m->adr_type() == mach->adr_type(),"matcher should not change adr type")
kvn
parents:
247
diff
changeset
|
3782 case OopPtr: |
c3e045194476
6731641: assert(m->adr_type() == mach->adr_type(),"matcher should not change adr type")
kvn
parents:
247
diff
changeset
|
3783 case InstPtr: |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3784 case AryPtr: |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3785 case MetadataPtr: |
293
c3e045194476
6731641: assert(m->adr_type() == mach->adr_type(),"matcher should not change adr type")
kvn
parents:
247
diff
changeset
|
3786 case KlassPtr: |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3787 case NarrowOop: |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3788 case NarrowKlass: |
293
c3e045194476
6731641: assert(m->adr_type() == mach->adr_type(),"matcher should not change adr type")
kvn
parents:
247
diff
changeset
|
3789 |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
3790 case Bottom: // Ye Olde Default |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
3791 return Type::BOTTOM; |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
3792 case Top: |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
3793 return this; |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
3794 |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
3795 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
|
3796 typerr(t); |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
3797 |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
3798 } // End of switch |
293
c3e045194476
6731641: assert(m->adr_type() == mach->adr_type(),"matcher should not change adr type")
kvn
parents:
247
diff
changeset
|
3799 |
c3e045194476
6731641: assert(m->adr_type() == mach->adr_type(),"matcher should not change adr type")
kvn
parents:
247
diff
changeset
|
3800 return this; |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
3801 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
3802 |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3803 #ifndef PRODUCT |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3804 void TypeNarrowPtr::dump2( Dict & d, uint depth, outputStream *st ) const { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3805 _ptrtype->dump2(d, depth, st); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3806 } |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3807 #endif |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3808 |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3809 const TypeNarrowOop *TypeNarrowOop::BOTTOM; |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3810 const TypeNarrowOop *TypeNarrowOop::NULL_PTR; |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3811 |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3812 |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3813 const TypeNarrowOop* TypeNarrowOop::make(const TypePtr* type) { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3814 return (const TypeNarrowOop*)(new TypeNarrowOop(type))->hashcons(); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3815 } |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3816 |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
3817 |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
3818 #ifndef PRODUCT |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
3819 void TypeNarrowOop::dump2( Dict & d, uint depth, outputStream *st ) const { |
417 | 3820 st->print("narrowoop: "); |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3821 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
|
3822 } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
3823 #endif |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
3824 |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3825 const TypeNarrowKlass *TypeNarrowKlass::NULL_PTR; |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3826 |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3827 const TypeNarrowKlass* TypeNarrowKlass::make(const TypePtr* type) { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3828 return (const TypeNarrowKlass*)(new TypeNarrowKlass(type))->hashcons(); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3829 } |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3830 |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3831 #ifndef PRODUCT |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3832 void TypeNarrowKlass::dump2( Dict & d, uint depth, outputStream *st ) const { |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3833 st->print("narrowklass: "); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3834 TypeNarrowPtr::dump2(d, depth, st); |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3835 } |
8e47bac5643a
7054512: Compress class pointers after perm gen removal
roland
parents:
6735
diff
changeset
|
3836 #endif |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
changeset
|
3837 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3838 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3839 //------------------------------eq--------------------------------------------- |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3840 // Structural equality check for Type representations |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3841 bool TypeMetadataPtr::eq( const Type *t ) const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3842 const TypeMetadataPtr *a = (const TypeMetadataPtr*)t; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3843 ciMetadata* one = metadata(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3844 ciMetadata* two = a->metadata(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3845 if (one == NULL || two == NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3846 return (one == two) && TypePtr::eq(t); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3847 } else { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3848 return one->equals(two) && TypePtr::eq(t); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3849 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3850 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3851 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3852 //------------------------------hash------------------------------------------- |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3853 // Type-specific hashing function. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3854 int TypeMetadataPtr::hash(void) const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3855 return |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3856 (metadata() ? metadata()->hash() : 0) + |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3857 TypePtr::hash(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3858 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3859 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3860 //------------------------------singleton-------------------------------------- |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3861 // 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
|
3862 // constants |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3863 bool TypeMetadataPtr::singleton(void) const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3864 // 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
|
3865 // TopPTR, Null, AnyNull, Constant are all singletons |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3866 return (_offset == 0) && !below_centerline(_ptr); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3867 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3868 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3869 //------------------------------add_offset------------------------------------- |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3870 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
|
3871 return make( _ptr, _metadata, xadd_offset(offset)); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3872 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3873 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3874 //-----------------------------filter------------------------------------------ |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3875 // Do not allow interface-vs.-noninterface joins to collapse to top. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3876 const Type *TypeMetadataPtr::filter( const Type *kills ) const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3877 const TypeMetadataPtr* ft = join(kills)->isa_metadataptr(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3878 if (ft == NULL || ft->empty()) |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3879 return Type::TOP; // Canonical empty value |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3880 return ft; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
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3881 } |
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3882 |
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3883 //------------------------------get_con---------------------------------------- |
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3884 intptr_t TypeMetadataPtr::get_con() const { |
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3885 assert( _ptr == Null || _ptr == Constant, "" ); |
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3886 assert( _offset >= 0, "" ); |
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3887 |
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3888 if (_offset != 0) { |
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3889 // After being ported to the compiler interface, the compiler no longer |
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3890 // directly manipulates the addresses of oops. Rather, it only has a pointer |
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3891 // to a handle at compile time. This handle is embedded in the generated |
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3892 // code and dereferenced at the time the nmethod is made. Until that time, |
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3893 // it is not reasonable to do arithmetic with the addresses of oops (we don't |
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3894 // have access to the addresses!). This does not seem to currently happen, |
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3895 // but this assertion here is to help prevent its occurence. |
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3896 tty->print_cr("Found oop constant with non-zero offset"); |
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3897 ShouldNotReachHere(); |
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3898 } |
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3899 |
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3900 return (intptr_t)metadata()->constant_encoding(); |
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3901 } |
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3902 |
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3903 //------------------------------cast_to_ptr_type------------------------------- |
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3904 const Type *TypeMetadataPtr::cast_to_ptr_type(PTR ptr) const { |
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3905 if( ptr == _ptr ) return this; |
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3906 return make(ptr, metadata(), _offset); |
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3907 } |
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3908 |
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3909 //------------------------------meet------------------------------------------- |
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3910 // Compute the MEET of two types. It returns a new Type object. |
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3911 const Type *TypeMetadataPtr::xmeet( const Type *t ) const { |
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3912 // Perform a fast test for common case; meeting the same types together. |
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3913 if( this == t ) return this; // Meeting same type-rep? |
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3914 |
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3915 // Current "this->_base" is OopPtr |
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3916 switch (t->base()) { // switch on original type |
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3917 |
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3918 case Int: // Mixing ints & oops happens when javac |
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3919 case Long: // reuses local variables |
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3920 case FloatTop: |
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3921 case FloatCon: |
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3922 case FloatBot: |
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3923 case DoubleTop: |
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3924 case DoubleCon: |
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3925 case DoubleBot: |
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3926 case NarrowOop: |
6848
8e47bac5643a
7054512: Compress class pointers after perm gen removal
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parents:
6735
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|
3927 case NarrowKlass: |
6725
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3928 case Bottom: // Ye Olde Default |
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3929 return Type::BOTTOM; |
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3930 case Top: |
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3931 return this; |
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|
3932 |
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3933 default: // All else is a mistake |
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3934 typerr(t); |
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3935 |
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3936 case AnyPtr: { |
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3937 // Found an AnyPtr type vs self-OopPtr type |
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3938 const TypePtr *tp = t->is_ptr(); |
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3939 int offset = meet_offset(tp->offset()); |
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3940 PTR ptr = meet_ptr(tp->ptr()); |
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3941 switch (tp->ptr()) { |
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3942 case Null: |
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3943 if (ptr == Null) return TypePtr::make(AnyPtr, ptr, offset); |
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3944 // else fall through: |
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3945 case TopPTR: |
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3946 case AnyNull: { |
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3947 return make(ptr, NULL, offset); |
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|
3948 } |
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|
3949 case BotPTR: |
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3950 case NotNull: |
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3951 return TypePtr::make(AnyPtr, ptr, offset); |
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|
3952 default: typerr(t); |
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|
3953 } |
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|
3954 } |
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|
3955 |
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|
3956 case RawPtr: |
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|
3957 case KlassPtr: |
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|
3958 case OopPtr: |
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|
3959 case InstPtr: |
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|
3960 case AryPtr: |
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3961 return TypePtr::BOTTOM; // Oop meet raw is not well defined |
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3962 |
6728 | 3963 case MetadataPtr: { |
3964 const TypeMetadataPtr *tp = t->is_metadataptr(); | |
3965 int offset = meet_offset(tp->offset()); | |
3966 PTR tptr = tp->ptr(); | |
3967 PTR ptr = meet_ptr(tptr); | |
3968 ciMetadata* md = (tptr == TopPTR) ? metadata() : tp->metadata(); | |
3969 if (tptr == TopPTR || _ptr == TopPTR || | |
3970 metadata()->equals(tp->metadata())) { | |
3971 return make(ptr, md, offset); | |
3972 } | |
3973 // metadata is different | |
3974 if( ptr == Constant ) { // Cannot be equal constants, so... | |
3975 if( tptr == Constant && _ptr != Constant) return t; | |
3976 if( _ptr == Constant && tptr != Constant) return this; | |
3977 ptr = NotNull; // Fall down in lattice | |
3978 } | |
3979 return make(ptr, NULL, offset); | |
6725
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3980 break; |
6728 | 3981 } |
6725
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3982 } // End of switch |
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|
3983 return this; // Return the double constant |
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|
3984 } |
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|
3985 |
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|
3986 |
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|
3987 //------------------------------xdual------------------------------------------ |
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|
3988 // Dual of a pure metadata pointer. |
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|
3989 const Type *TypeMetadataPtr::xdual() const { |
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3990 return new TypeMetadataPtr(dual_ptr(), metadata(), dual_offset()); |
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|
3991 } |
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|
3992 |
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|
3993 //------------------------------dump2------------------------------------------ |
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|
3994 #ifndef PRODUCT |
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|
3995 void TypeMetadataPtr::dump2( Dict &d, uint depth, outputStream *st ) const { |
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3996 st->print("metadataptr:%s", ptr_msg[_ptr]); |
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3997 if( metadata() ) st->print(INTPTR_FORMAT, metadata()); |
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3998 switch( _offset ) { |
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3999 case OffsetTop: st->print("+top"); break; |
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4000 case OffsetBot: st->print("+any"); break; |
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4001 case 0: break; |
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|
4002 default: st->print("+%d",_offset); break; |
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|
4003 } |
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|
4004 } |
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|
4005 #endif |
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|
4006 |
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|
4007 |
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|
4008 //============================================================================= |
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|
4009 // Convenience common pre-built type. |
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|
4010 const TypeMetadataPtr *TypeMetadataPtr::BOTTOM; |
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|
4011 |
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4012 TypeMetadataPtr::TypeMetadataPtr(PTR ptr, ciMetadata* metadata, int offset): |
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4013 TypePtr(MetadataPtr, ptr, offset), _metadata(metadata) { |
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|
4014 } |
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|
4015 |
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|
4016 const TypeMetadataPtr* TypeMetadataPtr::make(ciMethod* m) { |
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4017 return make(Constant, m, 0); |
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|
4018 } |
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|
4019 const TypeMetadataPtr* TypeMetadataPtr::make(ciMethodData* m) { |
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4020 return make(Constant, m, 0); |
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|
4021 } |
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4022 |
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4023 //------------------------------make------------------------------------------- |
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4024 // Create a meta data constant |
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4025 const TypeMetadataPtr *TypeMetadataPtr::make(PTR ptr, ciMetadata* m, int offset) { |
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4026 assert(m == NULL || !m->is_klass(), "wrong type"); |
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4027 return (TypeMetadataPtr*)(new TypeMetadataPtr(ptr, m, offset))->hashcons(); |
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4028 } |
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4029 |
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4030 |
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4031 //============================================================================= |
0 | 4032 // Convenience common pre-built types. |
4033 | |
4034 // Not-null object klass or below | |
4035 const TypeKlassPtr *TypeKlassPtr::OBJECT; | |
4036 const TypeKlassPtr *TypeKlassPtr::OBJECT_OR_NULL; | |
4037 | |
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4038 //------------------------------TypeKlassPtr----------------------------------- |
0 | 4039 TypeKlassPtr::TypeKlassPtr( PTR ptr, ciKlass* klass, int offset ) |
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4040 : TypePtr(KlassPtr, ptr, offset), _klass(klass), _klass_is_exact(ptr == Constant) { |
0 | 4041 } |
4042 | |
4043 //------------------------------make------------------------------------------- | |
4044 // ptr to klass 'k', if Constant, or possibly to a sub-klass if not a Constant | |
4045 const TypeKlassPtr *TypeKlassPtr::make( PTR ptr, ciKlass* k, int offset ) { | |
4046 assert( k != NULL, "Expect a non-NULL klass"); | |
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4047 assert(k->is_instance_klass() || k->is_array_klass(), "Incorrect type of klass oop"); |
0 | 4048 TypeKlassPtr *r = |
4049 (TypeKlassPtr*)(new TypeKlassPtr(ptr, k, offset))->hashcons(); | |
4050 | |
4051 return r; | |
4052 } | |
4053 | |
4054 //------------------------------eq--------------------------------------------- | |
4055 // Structural equality check for Type representations | |
4056 bool TypeKlassPtr::eq( const Type *t ) const { | |
4057 const TypeKlassPtr *p = t->is_klassptr(); | |
4058 return | |
4059 klass()->equals(p->klass()) && | |
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4060 TypePtr::eq(p); |
0 | 4061 } |
4062 | |
4063 //------------------------------hash------------------------------------------- | |
4064 // Type-specific hashing function. | |
4065 int TypeKlassPtr::hash(void) const { | |
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4066 return klass()->hash() + TypePtr::hash(); |
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4067 } |
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4068 |
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4069 //------------------------------singleton-------------------------------------- |
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4070 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple |
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4071 // constants |
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4072 bool TypeKlassPtr::singleton(void) const { |
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4073 // detune optimizer to not generate constant klass + constant offset as a constant! |
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4074 // TopPTR, Null, AnyNull, Constant are all singletons |
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4075 return (_offset == 0) && !below_centerline(_ptr); |
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4076 } |
0 | 4077 |
1761 | 4078 //----------------------compute_klass------------------------------------------ |
4079 // Compute the defining klass for this class | |
4080 ciKlass* TypeAryPtr::compute_klass(DEBUG_ONLY(bool verify)) const { | |
4081 // Compute _klass based on element type. | |
0 | 4082 ciKlass* k_ary = NULL; |
4083 const TypeInstPtr *tinst; | |
4084 const TypeAryPtr *tary; | |
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4085 const Type* el = elem(); |
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4086 if (el->isa_narrowoop()) { |
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4087 el = el->make_ptr(); |
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4088 } |
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4089 |
0 | 4090 // Get element klass |
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4091 if ((tinst = el->isa_instptr()) != NULL) { |
0 | 4092 // Compute array klass from element klass |
4093 k_ary = ciObjArrayKlass::make(tinst->klass()); | |
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4094 } else if ((tary = el->isa_aryptr()) != NULL) { |
0 | 4095 // Compute array klass from element klass |
4096 ciKlass* k_elem = tary->klass(); | |
4097 // If element type is something like bottom[], k_elem will be null. | |
4098 if (k_elem != NULL) | |
4099 k_ary = ciObjArrayKlass::make(k_elem); | |
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4100 } else if ((el->base() == Type::Top) || |
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4101 (el->base() == Type::Bottom)) { |
0 | 4102 // element type of Bottom occurs from meet of basic type |
4103 // and object; Top occurs when doing join on Bottom. | |
4104 // Leave k_ary at NULL. | |
4105 } else { | |
4106 // Cannot compute array klass directly from basic type, | |
4107 // since subtypes of TypeInt all have basic type T_INT. | |
1761 | 4108 #ifdef ASSERT |
4109 if (verify && el->isa_int()) { | |
4110 // Check simple cases when verifying klass. | |
4111 BasicType bt = T_ILLEGAL; | |
4112 if (el == TypeInt::BYTE) { | |
4113 bt = T_BYTE; | |
4114 } else if (el == TypeInt::SHORT) { | |
4115 bt = T_SHORT; | |
4116 } else if (el == TypeInt::CHAR) { | |
4117 bt = T_CHAR; | |
4118 } else if (el == TypeInt::INT) { | |
4119 bt = T_INT; | |
4120 } else { | |
4121 return _klass; // just return specified klass | |
4122 } | |
4123 return ciTypeArrayKlass::make(bt); | |
4124 } | |
4125 #endif | |
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4126 assert(!el->isa_int(), |
0 | 4127 "integral arrays must be pre-equipped with a class"); |
4128 // Compute array klass directly from basic type | |
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4129 k_ary = ciTypeArrayKlass::make(el->basic_type()); |
0 | 4130 } |
1761 | 4131 return k_ary; |
4132 } | |
4133 | |
4134 //------------------------------klass------------------------------------------ | |
4135 // Return the defining klass for this class | |
4136 ciKlass* TypeAryPtr::klass() const { | |
4137 if( _klass ) return _klass; // Return cached value, if possible | |
4138 | |
4139 // Oops, need to compute _klass and cache it | |
4140 ciKlass* k_ary = compute_klass(); | |
0 | 4141 |
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4142 if( this != TypeAryPtr::OOPS && this->dual() != TypeAryPtr::OOPS ) { |
0 | 4143 // The _klass field acts as a cache of the underlying |
4144 // ciKlass for this array type. In order to set the field, | |
4145 // we need to cast away const-ness. | |
4146 // | |
4147 // IMPORTANT NOTE: we *never* set the _klass field for the | |
4148 // type TypeAryPtr::OOPS. This Type is shared between all | |
4149 // active compilations. However, the ciKlass which represents | |
4150 // this Type is *not* shared between compilations, so caching | |
4151 // this value would result in fetching a dangling pointer. | |
4152 // | |
4153 // Recomputing the underlying ciKlass for each request is | |
4154 // a bit less efficient than caching, but calls to | |
4155 // TypeAryPtr::OOPS->klass() are not common enough to matter. | |
4156 ((TypeAryPtr*)this)->_klass = k_ary; | |
163 | 4157 if (UseCompressedOops && k_ary != NULL && k_ary->is_obj_array_klass() && |
4158 _offset != 0 && _offset != arrayOopDesc::length_offset_in_bytes()) { | |
4159 ((TypeAryPtr*)this)->_is_ptr_to_narrowoop = true; | |
4160 } | |
4161 } | |
0 | 4162 return k_ary; |
4163 } | |
4164 | |
4165 | |
4166 //------------------------------add_offset------------------------------------- | |
4167 // Access internals of klass object | |
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4168 const TypePtr *TypeKlassPtr::add_offset( intptr_t offset ) const { |
0 | 4169 return make( _ptr, klass(), xadd_offset(offset) ); |
4170 } | |
4171 | |
4172 //------------------------------cast_to_ptr_type------------------------------- | |
4173 const Type *TypeKlassPtr::cast_to_ptr_type(PTR ptr) const { | |
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4174 assert(_base == KlassPtr, "subclass must override cast_to_ptr_type"); |
0 | 4175 if( ptr == _ptr ) return this; |
4176 return make(ptr, _klass, _offset); | |
4177 } | |
4178 | |
4179 | |
4180 //-----------------------------cast_to_exactness------------------------------- | |
4181 const Type *TypeKlassPtr::cast_to_exactness(bool klass_is_exact) const { | |
4182 if( klass_is_exact == _klass_is_exact ) return this; | |
4183 if (!UseExactTypes) return this; | |
4184 return make(klass_is_exact ? Constant : NotNull, _klass, _offset); | |
4185 } | |
4186 | |
4187 | |
4188 //-----------------------------as_instance_type-------------------------------- | |
4189 // Corresponding type for an instance of the given class. | |
4190 // It will be NotNull, and exact if and only if the klass type is exact. | |
4191 const TypeOopPtr* TypeKlassPtr::as_instance_type() const { | |
4192 ciKlass* k = klass(); | |
4193 bool xk = klass_is_exact(); | |
4194 //return TypeInstPtr::make(TypePtr::NotNull, k, xk, NULL, 0); | |
4195 const TypeOopPtr* toop = TypeOopPtr::make_from_klass_raw(k); | |
4196 toop = toop->cast_to_ptr_type(TypePtr::NotNull)->is_oopptr(); | |
4197 return toop->cast_to_exactness(xk)->is_oopptr(); | |
4198 } | |
4199 | |
4200 | |
4201 //------------------------------xmeet------------------------------------------ | |
4202 // Compute the MEET of two types, return a new Type object. | |
4203 const Type *TypeKlassPtr::xmeet( const Type *t ) const { | |
4204 // Perform a fast test for common case; meeting the same types together. | |
4205 if( this == t ) return this; // Meeting same type-rep? | |
4206 | |
4207 // Current "this->_base" is Pointer | |
4208 switch (t->base()) { // switch on original type | |
4209 | |
4210 case Int: // Mixing ints & oops happens when javac | |
4211 case Long: // reuses local variables | |
4212 case FloatTop: | |
4213 case FloatCon: | |
4214 case FloatBot: | |
4215 case DoubleTop: | |
4216 case DoubleCon: | |
4217 case DoubleBot: | |
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4218 case NarrowOop: |
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4219 case NarrowKlass: |
0 | 4220 case Bottom: // Ye Olde Default |
4221 return Type::BOTTOM; | |
4222 case Top: | |
4223 return this; | |
4224 | |
4225 default: // All else is a mistake | |
4226 typerr(t); | |
4227 | |
4228 case AnyPtr: { // Meeting to AnyPtrs | |
4229 // Found an AnyPtr type vs self-KlassPtr type | |
4230 const TypePtr *tp = t->is_ptr(); | |
4231 int offset = meet_offset(tp->offset()); | |
4232 PTR ptr = meet_ptr(tp->ptr()); | |
4233 switch (tp->ptr()) { | |
4234 case TopPTR: | |
4235 return this; | |
4236 case Null: | |
4237 if( ptr == Null ) return TypePtr::make( AnyPtr, ptr, offset ); | |
4238 case AnyNull: | |
4239 return make( ptr, klass(), offset ); | |
4240 case BotPTR: | |
4241 case NotNull: | |
4242 return TypePtr::make(AnyPtr, ptr, offset); | |
4243 default: typerr(t); | |
4244 } | |
4245 } | |
4246 | |
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4247 case RawPtr: |
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4248 case MetadataPtr: |
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4249 case OopPtr: |
0 | 4250 case AryPtr: // Meet with AryPtr |
4251 case InstPtr: // Meet with InstPtr | |
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4252 return TypePtr::BOTTOM; |
0 | 4253 |
4254 // | |
4255 // A-top } | |
4256 // / | \ } Tops | |
4257 // B-top A-any C-top } | |
4258 // | / | \ | } Any-nulls | |
4259 // B-any | C-any } | |
4260 // | | | | |
4261 // B-con A-con C-con } constants; not comparable across classes | |
4262 // | | | | |
4263 // B-not | C-not } | |
4264 // | \ | / | } not-nulls | |
4265 // B-bot A-not C-bot } | |
4266 // \ | / } Bottoms | |
4267 // A-bot } | |
4268 // | |
4269 | |
4270 case KlassPtr: { // Meet two KlassPtr types | |
4271 const TypeKlassPtr *tkls = t->is_klassptr(); | |
4272 int off = meet_offset(tkls->offset()); | |
4273 PTR ptr = meet_ptr(tkls->ptr()); | |
4274 | |
4275 // Check for easy case; klasses are equal (and perhaps not loaded!) | |
4276 // If we have constants, then we created oops so classes are loaded | |
4277 // and we can handle the constants further down. This case handles | |
4278 // not-loaded classes | |
4279 if( ptr != Constant && tkls->klass()->equals(klass()) ) { | |
4280 return make( ptr, klass(), off ); | |
4281 } | |
4282 | |
4283 // Classes require inspection in the Java klass hierarchy. Must be loaded. | |
4284 ciKlass* tkls_klass = tkls->klass(); | |
4285 ciKlass* this_klass = this->klass(); | |
4286 assert( tkls_klass->is_loaded(), "This class should have been loaded."); | |
4287 assert( this_klass->is_loaded(), "This class should have been loaded."); | |
4288 | |
4289 // If 'this' type is above the centerline and is a superclass of the | |
4290 // other, we can treat 'this' as having the same type as the other. | |
4291 if ((above_centerline(this->ptr())) && | |
4292 tkls_klass->is_subtype_of(this_klass)) { | |
4293 this_klass = tkls_klass; | |
4294 } | |
4295 // If 'tinst' type is above the centerline and is a superclass of the | |
4296 // other, we can treat 'tinst' as having the same type as the other. | |
4297 if ((above_centerline(tkls->ptr())) && | |
4298 this_klass->is_subtype_of(tkls_klass)) { | |
4299 tkls_klass = this_klass; | |
4300 } | |
4301 | |
4302 // Check for classes now being equal | |
4303 if (tkls_klass->equals(this_klass)) { | |
4304 // If the klasses are equal, the constants may still differ. Fall to | |
4305 // NotNull if they do (neither constant is NULL; that is a special case | |
4306 // handled elsewhere). | |
4307 if( ptr == Constant ) { | |
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4308 if (this->_ptr == Constant && tkls->_ptr == Constant && |
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4309 this->klass()->equals(tkls->klass())); |
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4310 else if (above_centerline(this->ptr())); |
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4311 else if (above_centerline(tkls->ptr())); |
0 | 4312 else |
4313 ptr = NotNull; | |
4314 } | |
4315 return make( ptr, this_klass, off ); | |
4316 } // Else classes are not equal | |
4317 | |
4318 // Since klasses are different, we require the LCA in the Java | |
4319 // class hierarchy - which means we have to fall to at least NotNull. | |
4320 if( ptr == TopPTR || ptr == AnyNull || ptr == Constant ) | |
4321 ptr = NotNull; | |
4322 // Now we find the LCA of Java classes | |
4323 ciKlass* k = this_klass->least_common_ancestor(tkls_klass); | |
4324 return make( ptr, k, off ); | |
4325 } // End of case KlassPtr | |
4326 | |
4327 } // End of switch | |
4328 return this; // Return the double constant | |
4329 } | |
4330 | |
4331 //------------------------------xdual------------------------------------------ | |
4332 // Dual: compute field-by-field dual | |
4333 const Type *TypeKlassPtr::xdual() const { | |
4334 return new TypeKlassPtr( dual_ptr(), klass(), dual_offset() ); | |
4335 } | |
4336 | |
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4337 //------------------------------get_con---------------------------------------- |
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4338 intptr_t TypeKlassPtr::get_con() const { |
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4339 assert( _ptr == Null || _ptr == Constant, "" ); |
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4340 assert( _offset >= 0, "" ); |
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4341 |
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4342 if (_offset != 0) { |
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4343 // After being ported to the compiler interface, the compiler no longer |
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4344 // directly manipulates the addresses of oops. Rather, it only has a pointer |
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4345 // to a handle at compile time. This handle is embedded in the generated |
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4346 // code and dereferenced at the time the nmethod is made. Until that time, |
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4347 // it is not reasonable to do arithmetic with the addresses of oops (we don't |
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4348 // have access to the addresses!). This does not seem to currently happen, |
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4349 // but this assertion here is to help prevent its occurence. |
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4350 tty->print_cr("Found oop constant with non-zero offset"); |
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4351 ShouldNotReachHere(); |
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4352 } |
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4353 |
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4354 return (intptr_t)klass()->constant_encoding(); |
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4355 } |
0 | 4356 //------------------------------dump2------------------------------------------ |
4357 // Dump Klass Type | |
4358 #ifndef PRODUCT | |
4359 void TypeKlassPtr::dump2( Dict & d, uint depth, outputStream *st ) const { | |
4360 switch( _ptr ) { | |
4361 case Constant: | |
4362 st->print("precise "); | |
4363 case NotNull: | |
4364 { | |
4365 const char *name = klass()->name()->as_utf8(); | |
4366 if( name ) { | |
4367 st->print("klass %s: " INTPTR_FORMAT, name, klass()); | |
4368 } else { | |
4369 ShouldNotReachHere(); | |
4370 } | |
4371 } | |
4372 case BotPTR: | |
4373 if( !WizardMode && !Verbose && !_klass_is_exact ) break; | |
4374 case TopPTR: | |
4375 case AnyNull: | |
4376 st->print(":%s", ptr_msg[_ptr]); | |
4377 if( _klass_is_exact ) st->print(":exact"); | |
4378 break; | |
4379 } | |
4380 | |
4381 if( _offset ) { // Dump offset, if any | |
4382 if( _offset == OffsetBot ) { st->print("+any"); } | |
4383 else if( _offset == OffsetTop ) { st->print("+unknown"); } | |
4384 else { st->print("+%d", _offset); } | |
4385 } | |
4386 | |
4387 st->print(" *"); | |
4388 } | |
4389 #endif | |
4390 | |
4391 | |
4392 | |
4393 //============================================================================= | |
4394 // Convenience common pre-built types. | |
4395 | |
4396 //------------------------------make------------------------------------------- | |
4397 const TypeFunc *TypeFunc::make( const TypeTuple *domain, const TypeTuple *range ) { | |
4398 return (TypeFunc*)(new TypeFunc(domain,range))->hashcons(); | |
4399 } | |
4400 | |
4401 //------------------------------make------------------------------------------- | |
4402 const TypeFunc *TypeFunc::make(ciMethod* method) { | |
4403 Compile* C = Compile::current(); | |
4404 const TypeFunc* tf = C->last_tf(method); // check cache | |
4405 if (tf != NULL) return tf; // The hit rate here is almost 50%. | |
4406 const TypeTuple *domain; | |
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4407 if (method->is_static()) { |
0 | 4408 domain = TypeTuple::make_domain(NULL, method->signature()); |
4409 } else { | |
4410 domain = TypeTuple::make_domain(method->holder(), method->signature()); | |
4411 } | |
4412 const TypeTuple *range = TypeTuple::make_range(method->signature()); | |
4413 tf = TypeFunc::make(domain, range); | |
4414 C->set_last_tf(method, tf); // fill cache | |
4415 return tf; | |
4416 } | |
4417 | |
4418 //------------------------------meet------------------------------------------- | |
4419 // Compute the MEET of two types. It returns a new Type object. | |
4420 const Type *TypeFunc::xmeet( const Type *t ) const { | |
4421 // Perform a fast test for common case; meeting the same types together. | |
4422 if( this == t ) return this; // Meeting same type-rep? | |
4423 | |
4424 // Current "this->_base" is Func | |
4425 switch (t->base()) { // switch on original type | |
4426 | |
4427 case Bottom: // Ye Olde Default | |
4428 return t; | |
4429 | |
4430 default: // All else is a mistake | |
4431 typerr(t); | |
4432 | |
4433 case Top: | |
4434 break; | |
4435 } | |
4436 return this; // Return the double constant | |
4437 } | |
4438 | |
4439 //------------------------------xdual------------------------------------------ | |
4440 // Dual: compute field-by-field dual | |
4441 const Type *TypeFunc::xdual() const { | |
4442 return this; | |
4443 } | |
4444 | |
4445 //------------------------------eq--------------------------------------------- | |
4446 // Structural equality check for Type representations | |
4447 bool TypeFunc::eq( const Type *t ) const { | |
4448 const TypeFunc *a = (const TypeFunc*)t; | |
4449 return _domain == a->_domain && | |
4450 _range == a->_range; | |
4451 } | |
4452 | |
4453 //------------------------------hash------------------------------------------- | |
4454 // Type-specific hashing function. | |
4455 int TypeFunc::hash(void) const { | |
4456 return (intptr_t)_domain + (intptr_t)_range; | |
4457 } | |
4458 | |
4459 //------------------------------dump2------------------------------------------ | |
4460 // Dump Function Type | |
4461 #ifndef PRODUCT | |
4462 void TypeFunc::dump2( Dict &d, uint depth, outputStream *st ) const { | |
4463 if( _range->_cnt <= Parms ) | |
4464 st->print("void"); | |
4465 else { | |
4466 uint i; | |
4467 for (i = Parms; i < _range->_cnt-1; i++) { | |
4468 _range->field_at(i)->dump2(d,depth,st); | |
4469 st->print("/"); | |
4470 } | |
4471 _range->field_at(i)->dump2(d,depth,st); | |
4472 } | |
4473 st->print(" "); | |
4474 st->print("( "); | |
4475 if( !depth || d[this] ) { // Check for recursive dump | |
4476 st->print("...)"); | |
4477 return; | |
4478 } | |
4479 d.Insert((void*)this,(void*)this); // Stop recursion | |
4480 if (Parms < _domain->_cnt) | |
4481 _domain->field_at(Parms)->dump2(d,depth-1,st); | |
4482 for (uint i = Parms+1; i < _domain->_cnt; i++) { | |
4483 st->print(", "); | |
4484 _domain->field_at(i)->dump2(d,depth-1,st); | |
4485 } | |
4486 st->print(" )"); | |
4487 } | |
4488 #endif | |
4489 | |
4490 //------------------------------singleton-------------------------------------- | |
4491 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
4492 // constants (Ldi nodes). Singletons are integer, float or double constants | |
4493 // or a single symbol. | |
4494 bool TypeFunc::singleton(void) const { | |
4495 return false; // Never a singleton | |
4496 } | |
4497 | |
4498 bool TypeFunc::empty(void) const { | |
4499 return false; // Never empty | |
4500 } | |
4501 | |
4502 | |
4503 BasicType TypeFunc::return_type() const{ | |
4504 if (range()->cnt() == TypeFunc::Parms) { | |
4505 return T_VOID; | |
4506 } | |
4507 return range()->field_at(TypeFunc::Parms)->basic_type(); | |
4508 } |