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annotate src/share/vm/opto/type.cpp @ 196:d1605aabd0a1 jdk7-b30
6719955: Update copyright year
Summary: Update copyright year for files that have been modified in 2008
Reviewed-by: ohair, tbell
| author | xdono |
|---|---|
| date | Wed, 02 Jul 2008 12:55:16 -0700 |
| parents | d4dbd9f91680 |
| children | 9c2ecc2ffb12 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 196 | 2 * Copyright 1997-2008 Sun Microsystems, Inc. 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 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 // Portions of code courtesy of Clifford Click | |
| 26 | |
| 27 // Optimization - Graph Style | |
| 28 | |
| 29 #include "incls/_precompiled.incl" | |
| 30 #include "incls/_type.cpp.incl" | |
| 31 | |
| 32 // Dictionary of types shared among compilations. | |
| 33 Dict* Type::_shared_type_dict = NULL; | |
| 34 | |
| 35 // Array which maps compiler types to Basic Types | |
| 36 const BasicType Type::_basic_type[Type::lastype] = { | |
| 37 T_ILLEGAL, // Bad | |
| 38 T_ILLEGAL, // Control | |
| 39 T_VOID, // Top | |
| 40 T_INT, // Int | |
| 41 T_LONG, // Long | |
| 42 T_VOID, // Half | |
|
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43 T_NARROWOOP, // NarrowOop |
| 0 | 44 |
| 45 T_ILLEGAL, // Tuple | |
| 46 T_ARRAY, // Array | |
| 47 | |
| 48 T_ADDRESS, // AnyPtr // shows up in factory methods for NULL_PTR | |
| 49 T_ADDRESS, // RawPtr | |
| 50 T_OBJECT, // OopPtr | |
| 51 T_OBJECT, // InstPtr | |
| 52 T_OBJECT, // AryPtr | |
| 53 T_OBJECT, // KlassPtr | |
| 54 | |
| 55 T_OBJECT, // Function | |
| 56 T_ILLEGAL, // Abio | |
| 57 T_ADDRESS, // Return_Address | |
| 58 T_ILLEGAL, // Memory | |
| 59 T_FLOAT, // FloatTop | |
| 60 T_FLOAT, // FloatCon | |
| 61 T_FLOAT, // FloatBot | |
| 62 T_DOUBLE, // DoubleTop | |
| 63 T_DOUBLE, // DoubleCon | |
| 64 T_DOUBLE, // DoubleBot | |
| 65 T_ILLEGAL, // Bottom | |
| 66 }; | |
| 67 | |
| 68 // Map ideal registers (machine types) to ideal types | |
| 69 const Type *Type::mreg2type[_last_machine_leaf]; | |
| 70 | |
| 71 // Map basic types to canonical Type* pointers. | |
| 72 const Type* Type:: _const_basic_type[T_CONFLICT+1]; | |
| 73 | |
| 74 // Map basic types to constant-zero Types. | |
| 75 const Type* Type:: _zero_type[T_CONFLICT+1]; | |
| 76 | |
| 77 // Map basic types to array-body alias types. | |
| 78 const TypeAryPtr* TypeAryPtr::_array_body_type[T_CONFLICT+1]; | |
| 79 | |
| 80 //============================================================================= | |
| 81 // Convenience common pre-built types. | |
| 82 const Type *Type::ABIO; // State-of-machine only | |
| 83 const Type *Type::BOTTOM; // All values | |
| 84 const Type *Type::CONTROL; // Control only | |
| 85 const Type *Type::DOUBLE; // All doubles | |
| 86 const Type *Type::FLOAT; // All floats | |
| 87 const Type *Type::HALF; // Placeholder half of doublewide type | |
| 88 const Type *Type::MEMORY; // Abstract store only | |
| 89 const Type *Type::RETURN_ADDRESS; | |
| 90 const Type *Type::TOP; // No values in set | |
| 91 | |
| 92 //------------------------------get_const_type--------------------------- | |
| 93 const Type* Type::get_const_type(ciType* type) { | |
| 94 if (type == NULL) { | |
| 95 return NULL; | |
| 96 } else if (type->is_primitive_type()) { | |
| 97 return get_const_basic_type(type->basic_type()); | |
| 98 } else { | |
| 99 return TypeOopPtr::make_from_klass(type->as_klass()); | |
| 100 } | |
| 101 } | |
| 102 | |
| 103 //---------------------------array_element_basic_type--------------------------------- | |
| 104 // Mapping to the array element's basic type. | |
| 105 BasicType Type::array_element_basic_type() const { | |
| 106 BasicType bt = basic_type(); | |
| 107 if (bt == T_INT) { | |
| 108 if (this == TypeInt::INT) return T_INT; | |
| 109 if (this == TypeInt::CHAR) return T_CHAR; | |
| 110 if (this == TypeInt::BYTE) return T_BYTE; | |
| 111 if (this == TypeInt::BOOL) return T_BOOLEAN; | |
| 112 if (this == TypeInt::SHORT) return T_SHORT; | |
| 113 return T_VOID; | |
| 114 } | |
| 115 return bt; | |
| 116 } | |
| 117 | |
| 118 //---------------------------get_typeflow_type--------------------------------- | |
| 119 // Import a type produced by ciTypeFlow. | |
| 120 const Type* Type::get_typeflow_type(ciType* type) { | |
| 121 switch (type->basic_type()) { | |
| 122 | |
| 123 case ciTypeFlow::StateVector::T_BOTTOM: | |
| 124 assert(type == ciTypeFlow::StateVector::bottom_type(), ""); | |
| 125 return Type::BOTTOM; | |
| 126 | |
| 127 case ciTypeFlow::StateVector::T_TOP: | |
| 128 assert(type == ciTypeFlow::StateVector::top_type(), ""); | |
| 129 return Type::TOP; | |
| 130 | |
| 131 case ciTypeFlow::StateVector::T_NULL: | |
| 132 assert(type == ciTypeFlow::StateVector::null_type(), ""); | |
| 133 return TypePtr::NULL_PTR; | |
| 134 | |
| 135 case ciTypeFlow::StateVector::T_LONG2: | |
| 136 // The ciTypeFlow pass pushes a long, then the half. | |
| 137 // We do the same. | |
| 138 assert(type == ciTypeFlow::StateVector::long2_type(), ""); | |
| 139 return TypeInt::TOP; | |
| 140 | |
| 141 case ciTypeFlow::StateVector::T_DOUBLE2: | |
| 142 // The ciTypeFlow pass pushes double, then the half. | |
| 143 // Our convention is the same. | |
| 144 assert(type == ciTypeFlow::StateVector::double2_type(), ""); | |
| 145 return Type::TOP; | |
| 146 | |
| 147 case T_ADDRESS: | |
| 148 assert(type->is_return_address(), ""); | |
| 149 return TypeRawPtr::make((address)(intptr_t)type->as_return_address()->bci()); | |
| 150 | |
| 151 default: | |
| 152 // make sure we did not mix up the cases: | |
| 153 assert(type != ciTypeFlow::StateVector::bottom_type(), ""); | |
| 154 assert(type != ciTypeFlow::StateVector::top_type(), ""); | |
| 155 assert(type != ciTypeFlow::StateVector::null_type(), ""); | |
| 156 assert(type != ciTypeFlow::StateVector::long2_type(), ""); | |
| 157 assert(type != ciTypeFlow::StateVector::double2_type(), ""); | |
| 158 assert(!type->is_return_address(), ""); | |
| 159 | |
| 160 return Type::get_const_type(type); | |
| 161 } | |
| 162 } | |
| 163 | |
| 164 | |
| 165 //------------------------------make------------------------------------------- | |
| 166 // Create a simple Type, with default empty symbol sets. Then hashcons it | |
| 167 // and look for an existing copy in the type dictionary. | |
| 168 const Type *Type::make( enum TYPES t ) { | |
| 169 return (new Type(t))->hashcons(); | |
| 170 } | |
| 171 | |
| 172 //------------------------------cmp-------------------------------------------- | |
| 173 int Type::cmp( const Type *const t1, const Type *const t2 ) { | |
| 174 if( t1->_base != t2->_base ) | |
| 175 return 1; // Missed badly | |
| 176 assert(t1 != t2 || t1->eq(t2), "eq must be reflexive"); | |
| 177 return !t1->eq(t2); // Return ZERO if equal | |
| 178 } | |
| 179 | |
| 180 //------------------------------hash------------------------------------------- | |
| 181 int Type::uhash( const Type *const t ) { | |
| 182 return t->hash(); | |
| 183 } | |
| 184 | |
| 185 //--------------------------Initialize_shared---------------------------------- | |
| 186 void Type::Initialize_shared(Compile* current) { | |
| 187 // This method does not need to be locked because the first system | |
| 188 // compilations (stub compilations) occur serially. If they are | |
| 189 // changed to proceed in parallel, then this section will need | |
| 190 // locking. | |
| 191 | |
| 192 Arena* save = current->type_arena(); | |
| 193 Arena* shared_type_arena = new Arena(); | |
| 194 | |
| 195 current->set_type_arena(shared_type_arena); | |
| 196 _shared_type_dict = | |
| 197 new (shared_type_arena) Dict( (CmpKey)Type::cmp, (Hash)Type::uhash, | |
| 198 shared_type_arena, 128 ); | |
| 199 current->set_type_dict(_shared_type_dict); | |
| 200 | |
| 201 // Make shared pre-built types. | |
| 202 CONTROL = make(Control); // Control only | |
| 203 TOP = make(Top); // No values in set | |
| 204 MEMORY = make(Memory); // Abstract store only | |
| 205 ABIO = make(Abio); // State-of-machine only | |
| 206 RETURN_ADDRESS=make(Return_Address); | |
| 207 FLOAT = make(FloatBot); // All floats | |
| 208 DOUBLE = make(DoubleBot); // All doubles | |
| 209 BOTTOM = make(Bottom); // Everything | |
| 210 HALF = make(Half); // Placeholder half of doublewide type | |
| 211 | |
| 212 TypeF::ZERO = TypeF::make(0.0); // Float 0 (positive zero) | |
| 213 TypeF::ONE = TypeF::make(1.0); // Float 1 | |
| 214 | |
| 215 TypeD::ZERO = TypeD::make(0.0); // Double 0 (positive zero) | |
| 216 TypeD::ONE = TypeD::make(1.0); // Double 1 | |
| 217 | |
| 218 TypeInt::MINUS_1 = TypeInt::make(-1); // -1 | |
| 219 TypeInt::ZERO = TypeInt::make( 0); // 0 | |
| 220 TypeInt::ONE = TypeInt::make( 1); // 1 | |
| 221 TypeInt::BOOL = TypeInt::make(0,1, WidenMin); // 0 or 1, FALSE or TRUE. | |
| 222 TypeInt::CC = TypeInt::make(-1, 1, WidenMin); // -1, 0 or 1, condition codes | |
| 223 TypeInt::CC_LT = TypeInt::make(-1,-1, WidenMin); // == TypeInt::MINUS_1 | |
| 224 TypeInt::CC_GT = TypeInt::make( 1, 1, WidenMin); // == TypeInt::ONE | |
| 225 TypeInt::CC_EQ = TypeInt::make( 0, 0, WidenMin); // == TypeInt::ZERO | |
| 226 TypeInt::CC_LE = TypeInt::make(-1, 0, WidenMin); | |
| 227 TypeInt::CC_GE = TypeInt::make( 0, 1, WidenMin); // == TypeInt::BOOL | |
| 228 TypeInt::BYTE = TypeInt::make(-128,127, WidenMin); // Bytes | |
| 229 TypeInt::CHAR = TypeInt::make(0,65535, WidenMin); // Java chars | |
| 230 TypeInt::SHORT = TypeInt::make(-32768,32767, WidenMin); // Java shorts | |
| 231 TypeInt::POS = TypeInt::make(0,max_jint, WidenMin); // Non-neg values | |
| 232 TypeInt::POS1 = TypeInt::make(1,max_jint, WidenMin); // Positive values | |
| 233 TypeInt::INT = TypeInt::make(min_jint,max_jint, WidenMax); // 32-bit integers | |
| 234 TypeInt::SYMINT = TypeInt::make(-max_jint,max_jint,WidenMin); // symmetric range | |
| 235 // CmpL is overloaded both as the bytecode computation returning | |
| 236 // a trinary (-1,0,+1) integer result AND as an efficient long | |
| 237 // compare returning optimizer ideal-type flags. | |
| 238 assert( TypeInt::CC_LT == TypeInt::MINUS_1, "types must match for CmpL to work" ); | |
| 239 assert( TypeInt::CC_GT == TypeInt::ONE, "types must match for CmpL to work" ); | |
| 240 assert( TypeInt::CC_EQ == TypeInt::ZERO, "types must match for CmpL to work" ); | |
| 241 assert( TypeInt::CC_GE == TypeInt::BOOL, "types must match for CmpL to work" ); | |
| 242 | |
| 243 TypeLong::MINUS_1 = TypeLong::make(-1); // -1 | |
| 244 TypeLong::ZERO = TypeLong::make( 0); // 0 | |
| 245 TypeLong::ONE = TypeLong::make( 1); // 1 | |
| 246 TypeLong::POS = TypeLong::make(0,max_jlong, WidenMin); // Non-neg values | |
| 247 TypeLong::LONG = TypeLong::make(min_jlong,max_jlong,WidenMax); // 64-bit integers | |
| 248 TypeLong::INT = TypeLong::make((jlong)min_jint,(jlong)max_jint,WidenMin); | |
| 249 TypeLong::UINT = TypeLong::make(0,(jlong)max_juint,WidenMin); | |
| 250 | |
| 251 const Type **fboth =(const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*)); | |
| 252 fboth[0] = Type::CONTROL; | |
| 253 fboth[1] = Type::CONTROL; | |
| 254 TypeTuple::IFBOTH = TypeTuple::make( 2, fboth ); | |
| 255 | |
| 256 const Type **ffalse =(const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*)); | |
| 257 ffalse[0] = Type::CONTROL; | |
| 258 ffalse[1] = Type::TOP; | |
| 259 TypeTuple::IFFALSE = TypeTuple::make( 2, ffalse ); | |
| 260 | |
| 261 const Type **fneither =(const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*)); | |
| 262 fneither[0] = Type::TOP; | |
| 263 fneither[1] = Type::TOP; | |
| 264 TypeTuple::IFNEITHER = TypeTuple::make( 2, fneither ); | |
| 265 | |
| 266 const Type **ftrue =(const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*)); | |
| 267 ftrue[0] = Type::TOP; | |
| 268 ftrue[1] = Type::CONTROL; | |
| 269 TypeTuple::IFTRUE = TypeTuple::make( 2, ftrue ); | |
| 270 | |
| 271 const Type **floop =(const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*)); | |
| 272 floop[0] = Type::CONTROL; | |
| 273 floop[1] = TypeInt::INT; | |
| 274 TypeTuple::LOOPBODY = TypeTuple::make( 2, floop ); | |
| 275 | |
| 276 TypePtr::NULL_PTR= TypePtr::make( AnyPtr, TypePtr::Null, 0 ); | |
| 277 TypePtr::NOTNULL = TypePtr::make( AnyPtr, TypePtr::NotNull, OffsetBot ); | |
| 278 TypePtr::BOTTOM = TypePtr::make( AnyPtr, TypePtr::BotPTR, OffsetBot ); | |
| 279 | |
| 280 TypeRawPtr::BOTTOM = TypeRawPtr::make( TypePtr::BotPTR ); | |
| 281 TypeRawPtr::NOTNULL= TypeRawPtr::make( TypePtr::NotNull ); | |
| 282 | |
| 283 const Type **fmembar = TypeTuple::fields(0); | |
| 284 TypeTuple::MEMBAR = TypeTuple::make(TypeFunc::Parms+0, fmembar); | |
| 285 | |
| 286 const Type **fsc = (const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*)); | |
| 287 fsc[0] = TypeInt::CC; | |
| 288 fsc[1] = Type::MEMORY; | |
| 289 TypeTuple::STORECONDITIONAL = TypeTuple::make(2, fsc); | |
| 290 | |
| 291 TypeInstPtr::NOTNULL = TypeInstPtr::make(TypePtr::NotNull, current->env()->Object_klass()); | |
| 292 TypeInstPtr::BOTTOM = TypeInstPtr::make(TypePtr::BotPTR, current->env()->Object_klass()); | |
| 293 TypeInstPtr::MIRROR = TypeInstPtr::make(TypePtr::NotNull, current->env()->Class_klass()); | |
| 294 TypeInstPtr::MARK = TypeInstPtr::make(TypePtr::BotPTR, current->env()->Object_klass(), | |
| 295 false, 0, oopDesc::mark_offset_in_bytes()); | |
| 296 TypeInstPtr::KLASS = TypeInstPtr::make(TypePtr::BotPTR, current->env()->Object_klass(), | |
| 297 false, 0, oopDesc::klass_offset_in_bytes()); | |
| 298 TypeOopPtr::BOTTOM = TypeOopPtr::make(TypePtr::BotPTR, OffsetBot); | |
| 299 | |
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300 TypeNarrowOop::NULL_PTR = TypeNarrowOop::make( TypePtr::NULL_PTR ); |
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301 TypeNarrowOop::BOTTOM = TypeNarrowOop::make( TypeInstPtr::BOTTOM ); |
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302 |
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303 mreg2type[Op_Node] = Type::BOTTOM; |
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304 mreg2type[Op_Set ] = 0; |
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305 mreg2type[Op_RegN] = TypeNarrowOop::BOTTOM; |
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306 mreg2type[Op_RegI] = TypeInt::INT; |
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307 mreg2type[Op_RegP] = TypePtr::BOTTOM; |
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308 mreg2type[Op_RegF] = Type::FLOAT; |
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309 mreg2type[Op_RegD] = Type::DOUBLE; |
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310 mreg2type[Op_RegL] = TypeLong::LONG; |
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311 mreg2type[Op_RegFlags] = TypeInt::CC; |
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312 |
| 0 | 313 TypeAryPtr::RANGE = TypeAryPtr::make( TypePtr::BotPTR, TypeAry::make(Type::BOTTOM,TypeInt::POS), current->env()->Object_klass(), false, arrayOopDesc::length_offset_in_bytes()); |
| 163 | 314 |
| 315 TypeAryPtr::NARROWOOPS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeNarrowOop::BOTTOM, TypeInt::POS), NULL /*ciArrayKlass::make(o)*/, false, Type::OffsetBot); | |
| 316 | |
| 317 #ifdef _LP64 | |
| 318 if (UseCompressedOops) { | |
| 319 TypeAryPtr::OOPS = TypeAryPtr::NARROWOOPS; | |
| 320 } else | |
| 321 #endif | |
| 322 { | |
| 323 // There is no shared klass for Object[]. See note in TypeAryPtr::klass(). | |
| 324 TypeAryPtr::OOPS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInstPtr::BOTTOM,TypeInt::POS), NULL /*ciArrayKlass::make(o)*/, false, Type::OffsetBot); | |
| 325 } | |
| 0 | 326 TypeAryPtr::BYTES = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::BYTE ,TypeInt::POS), ciTypeArrayKlass::make(T_BYTE), true, Type::OffsetBot); |
| 327 TypeAryPtr::SHORTS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::SHORT ,TypeInt::POS), ciTypeArrayKlass::make(T_SHORT), true, Type::OffsetBot); | |
| 328 TypeAryPtr::CHARS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::CHAR ,TypeInt::POS), ciTypeArrayKlass::make(T_CHAR), true, Type::OffsetBot); | |
| 329 TypeAryPtr::INTS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::INT ,TypeInt::POS), ciTypeArrayKlass::make(T_INT), true, Type::OffsetBot); | |
| 330 TypeAryPtr::LONGS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeLong::LONG ,TypeInt::POS), ciTypeArrayKlass::make(T_LONG), true, Type::OffsetBot); | |
| 331 TypeAryPtr::FLOATS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(Type::FLOAT ,TypeInt::POS), ciTypeArrayKlass::make(T_FLOAT), true, Type::OffsetBot); | |
| 332 TypeAryPtr::DOUBLES = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(Type::DOUBLE ,TypeInt::POS), ciTypeArrayKlass::make(T_DOUBLE), true, Type::OffsetBot); | |
| 333 | |
| 163 | 334 // Nobody should ask _array_body_type[T_NARROWOOP]. Use NULL as assert. |
| 335 TypeAryPtr::_array_body_type[T_NARROWOOP] = NULL; | |
| 0 | 336 TypeAryPtr::_array_body_type[T_OBJECT] = TypeAryPtr::OOPS; |
| 163 | 337 TypeAryPtr::_array_body_type[T_ARRAY] = TypeAryPtr::OOPS; // arrays are stored in oop arrays |
| 0 | 338 TypeAryPtr::_array_body_type[T_BYTE] = TypeAryPtr::BYTES; |
| 339 TypeAryPtr::_array_body_type[T_BOOLEAN] = TypeAryPtr::BYTES; // boolean[] is a byte array | |
| 340 TypeAryPtr::_array_body_type[T_SHORT] = TypeAryPtr::SHORTS; | |
| 341 TypeAryPtr::_array_body_type[T_CHAR] = TypeAryPtr::CHARS; | |
| 342 TypeAryPtr::_array_body_type[T_INT] = TypeAryPtr::INTS; | |
| 343 TypeAryPtr::_array_body_type[T_LONG] = TypeAryPtr::LONGS; | |
| 344 TypeAryPtr::_array_body_type[T_FLOAT] = TypeAryPtr::FLOATS; | |
| 345 TypeAryPtr::_array_body_type[T_DOUBLE] = TypeAryPtr::DOUBLES; | |
| 346 | |
| 347 TypeKlassPtr::OBJECT = TypeKlassPtr::make( TypePtr::NotNull, current->env()->Object_klass(), 0 ); | |
| 348 TypeKlassPtr::OBJECT_OR_NULL = TypeKlassPtr::make( TypePtr::BotPTR, current->env()->Object_klass(), 0 ); | |
| 349 | |
| 350 const Type **fi2c = TypeTuple::fields(2); | |
| 351 fi2c[TypeFunc::Parms+0] = TypeInstPtr::BOTTOM; // methodOop | |
| 352 fi2c[TypeFunc::Parms+1] = TypeRawPtr::BOTTOM; // argument pointer | |
| 353 TypeTuple::START_I2C = TypeTuple::make(TypeFunc::Parms+2, fi2c); | |
| 354 | |
| 355 const Type **intpair = TypeTuple::fields(2); | |
| 356 intpair[0] = TypeInt::INT; | |
| 357 intpair[1] = TypeInt::INT; | |
| 358 TypeTuple::INT_PAIR = TypeTuple::make(2, intpair); | |
| 359 | |
| 360 const Type **longpair = TypeTuple::fields(2); | |
| 361 longpair[0] = TypeLong::LONG; | |
| 362 longpair[1] = TypeLong::LONG; | |
| 363 TypeTuple::LONG_PAIR = TypeTuple::make(2, longpair); | |
| 364 | |
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365 _const_basic_type[T_NARROWOOP] = TypeNarrowOop::BOTTOM; |
| 0 | 366 _const_basic_type[T_BOOLEAN] = TypeInt::BOOL; |
| 367 _const_basic_type[T_CHAR] = TypeInt::CHAR; | |
| 368 _const_basic_type[T_BYTE] = TypeInt::BYTE; | |
| 369 _const_basic_type[T_SHORT] = TypeInt::SHORT; | |
| 370 _const_basic_type[T_INT] = TypeInt::INT; | |
| 371 _const_basic_type[T_LONG] = TypeLong::LONG; | |
| 372 _const_basic_type[T_FLOAT] = Type::FLOAT; | |
| 373 _const_basic_type[T_DOUBLE] = Type::DOUBLE; | |
| 374 _const_basic_type[T_OBJECT] = TypeInstPtr::BOTTOM; | |
| 375 _const_basic_type[T_ARRAY] = TypeInstPtr::BOTTOM; // there is no separate bottom for arrays | |
| 376 _const_basic_type[T_VOID] = TypePtr::NULL_PTR; // reflection represents void this way | |
| 377 _const_basic_type[T_ADDRESS] = TypeRawPtr::BOTTOM; // both interpreter return addresses & random raw ptrs | |
| 378 _const_basic_type[T_CONFLICT]= Type::BOTTOM; // why not? | |
| 379 | |
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380 _zero_type[T_NARROWOOP] = TypeNarrowOop::NULL_PTR; |
| 0 | 381 _zero_type[T_BOOLEAN] = TypeInt::ZERO; // false == 0 |
| 382 _zero_type[T_CHAR] = TypeInt::ZERO; // '\0' == 0 | |
| 383 _zero_type[T_BYTE] = TypeInt::ZERO; // 0x00 == 0 | |
| 384 _zero_type[T_SHORT] = TypeInt::ZERO; // 0x0000 == 0 | |
| 385 _zero_type[T_INT] = TypeInt::ZERO; | |
| 386 _zero_type[T_LONG] = TypeLong::ZERO; | |
| 387 _zero_type[T_FLOAT] = TypeF::ZERO; | |
| 388 _zero_type[T_DOUBLE] = TypeD::ZERO; | |
| 389 _zero_type[T_OBJECT] = TypePtr::NULL_PTR; | |
| 390 _zero_type[T_ARRAY] = TypePtr::NULL_PTR; // null array is null oop | |
| 391 _zero_type[T_ADDRESS] = TypePtr::NULL_PTR; // raw pointers use the same null | |
| 392 _zero_type[T_VOID] = Type::TOP; // the only void value is no value at all | |
| 393 | |
| 394 // get_zero_type() should not happen for T_CONFLICT | |
| 395 _zero_type[T_CONFLICT]= NULL; | |
| 396 | |
| 397 // Restore working type arena. | |
| 398 current->set_type_arena(save); | |
| 399 current->set_type_dict(NULL); | |
| 400 } | |
| 401 | |
| 402 //------------------------------Initialize------------------------------------- | |
| 403 void Type::Initialize(Compile* current) { | |
| 404 assert(current->type_arena() != NULL, "must have created type arena"); | |
| 405 | |
| 406 if (_shared_type_dict == NULL) { | |
| 407 Initialize_shared(current); | |
| 408 } | |
| 409 | |
| 410 Arena* type_arena = current->type_arena(); | |
| 411 | |
| 412 // Create the hash-cons'ing dictionary with top-level storage allocation | |
| 413 Dict *tdic = new (type_arena) Dict( (CmpKey)Type::cmp,(Hash)Type::uhash, type_arena, 128 ); | |
| 414 current->set_type_dict(tdic); | |
| 415 | |
| 416 // Transfer the shared types. | |
| 417 DictI i(_shared_type_dict); | |
| 418 for( ; i.test(); ++i ) { | |
| 419 Type* t = (Type*)i._value; | |
| 420 tdic->Insert(t,t); // New Type, insert into Type table | |
| 421 } | |
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422 |
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423 #ifdef ASSERT |
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424 verify_lastype(); |
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425 #endif |
| 0 | 426 } |
| 427 | |
| 428 //------------------------------hashcons--------------------------------------- | |
| 429 // Do the hash-cons trick. If the Type already exists in the type table, | |
| 430 // delete the current Type and return the existing Type. Otherwise stick the | |
| 431 // current Type in the Type table. | |
| 432 const Type *Type::hashcons(void) { | |
| 433 debug_only(base()); // Check the assertion in Type::base(). | |
| 434 // Look up the Type in the Type dictionary | |
| 435 Dict *tdic = type_dict(); | |
| 436 Type* old = (Type*)(tdic->Insert(this, this, false)); | |
| 437 if( old ) { // Pre-existing Type? | |
| 438 if( old != this ) // Yes, this guy is not the pre-existing? | |
| 439 delete this; // Yes, Nuke this guy | |
| 440 assert( old->_dual, "" ); | |
| 441 return old; // Return pre-existing | |
| 442 } | |
| 443 | |
| 444 // Every type has a dual (to make my lattice symmetric). | |
| 445 // Since we just discovered a new Type, compute its dual right now. | |
| 446 assert( !_dual, "" ); // No dual yet | |
| 447 _dual = xdual(); // Compute the dual | |
| 448 if( cmp(this,_dual)==0 ) { // Handle self-symmetric | |
| 449 _dual = this; | |
| 450 return this; | |
| 451 } | |
| 452 assert( !_dual->_dual, "" ); // No reverse dual yet | |
| 453 assert( !(*tdic)[_dual], "" ); // Dual not in type system either | |
| 454 // New Type, insert into Type table | |
| 455 tdic->Insert((void*)_dual,(void*)_dual); | |
| 456 ((Type*)_dual)->_dual = this; // Finish up being symmetric | |
| 457 #ifdef ASSERT | |
| 458 Type *dual_dual = (Type*)_dual->xdual(); | |
| 459 assert( eq(dual_dual), "xdual(xdual()) should be identity" ); | |
| 460 delete dual_dual; | |
| 461 #endif | |
| 462 return this; // Return new Type | |
| 463 } | |
| 464 | |
| 465 //------------------------------eq--------------------------------------------- | |
| 466 // Structural equality check for Type representations | |
| 467 bool Type::eq( const Type * ) const { | |
| 468 return true; // Nothing else can go wrong | |
| 469 } | |
| 470 | |
| 471 //------------------------------hash------------------------------------------- | |
| 472 // Type-specific hashing function. | |
| 473 int Type::hash(void) const { | |
| 474 return _base; | |
| 475 } | |
| 476 | |
| 477 //------------------------------is_finite-------------------------------------- | |
| 478 // Has a finite value | |
| 479 bool Type::is_finite() const { | |
| 480 return false; | |
| 481 } | |
| 482 | |
| 483 //------------------------------is_nan----------------------------------------- | |
| 484 // Is not a number (NaN) | |
| 485 bool Type::is_nan() const { | |
| 486 return false; | |
| 487 } | |
| 488 | |
| 489 //------------------------------meet------------------------------------------- | |
| 490 // Compute the MEET of two types. NOT virtual. It enforces that meet is | |
| 491 // commutative and the lattice is symmetric. | |
| 492 const Type *Type::meet( const Type *t ) const { | |
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493 if (isa_narrowoop() && t->isa_narrowoop()) { |
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494 const Type* result = is_narrowoop()->make_oopptr()->meet(t->is_narrowoop()->make_oopptr()); |
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495 if (result->isa_oopptr()) { |
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496 return result->isa_oopptr()->make_narrowoop(); |
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497 } else if (result == TypePtr::NULL_PTR) { |
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498 return TypeNarrowOop::NULL_PTR; |
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499 } else { |
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500 return result; |
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501 } |
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502 } |
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503 |
| 0 | 504 const Type *mt = xmeet(t); |
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505 if (isa_narrowoop() || t->isa_narrowoop()) return mt; |
| 0 | 506 #ifdef ASSERT |
| 507 assert( mt == t->xmeet(this), "meet not commutative" ); | |
| 508 const Type* dual_join = mt->_dual; | |
| 509 const Type *t2t = dual_join->xmeet(t->_dual); | |
| 510 const Type *t2this = dual_join->xmeet( _dual); | |
| 511 | |
| 512 // Interface meet Oop is Not Symmetric: | |
| 513 // Interface:AnyNull meet Oop:AnyNull == Interface:AnyNull | |
| 514 // Interface:NotNull meet Oop:NotNull == java/lang/Object:NotNull | |
| 515 const TypeInstPtr* this_inst = this->isa_instptr(); | |
| 516 const TypeInstPtr* t_inst = t->isa_instptr(); | |
| 517 bool interface_vs_oop = false; | |
| 518 if( this_inst && this_inst->is_loaded() && t_inst && t_inst->is_loaded() ) { | |
| 519 bool this_interface = this_inst->klass()->is_interface(); | |
| 520 bool t_interface = t_inst->klass()->is_interface(); | |
| 521 interface_vs_oop = this_interface ^ t_interface; | |
| 522 } | |
| 523 const Type *tdual = t->_dual; | |
| 524 const Type *thisdual = _dual; | |
| 525 // strip out instances | |
| 526 if (t2t->isa_oopptr() != NULL) { | |
| 527 t2t = t2t->isa_oopptr()->cast_to_instance(TypeOopPtr::UNKNOWN_INSTANCE); | |
| 528 } | |
| 529 if (t2this->isa_oopptr() != NULL) { | |
| 530 t2this = t2this->isa_oopptr()->cast_to_instance(TypeOopPtr::UNKNOWN_INSTANCE); | |
| 531 } | |
| 532 if (tdual->isa_oopptr() != NULL) { | |
| 533 tdual = tdual->isa_oopptr()->cast_to_instance(TypeOopPtr::UNKNOWN_INSTANCE); | |
| 534 } | |
| 535 if (thisdual->isa_oopptr() != NULL) { | |
| 536 thisdual = thisdual->isa_oopptr()->cast_to_instance(TypeOopPtr::UNKNOWN_INSTANCE); | |
| 537 } | |
| 538 | |
| 539 if( !interface_vs_oop && (t2t != tdual || t2this != thisdual) ) { | |
| 540 tty->print_cr("=== Meet Not Symmetric ==="); | |
| 541 tty->print("t = "); t->dump(); tty->cr(); | |
| 542 tty->print("this= "); dump(); tty->cr(); | |
| 543 tty->print("mt=(t meet this)= "); mt->dump(); tty->cr(); | |
| 544 | |
| 545 tty->print("t_dual= "); t->_dual->dump(); tty->cr(); | |
| 546 tty->print("this_dual= "); _dual->dump(); tty->cr(); | |
| 547 tty->print("mt_dual= "); mt->_dual->dump(); tty->cr(); | |
| 548 | |
| 549 tty->print("mt_dual meet t_dual= "); t2t ->dump(); tty->cr(); | |
| 550 tty->print("mt_dual meet this_dual= "); t2this ->dump(); tty->cr(); | |
| 551 | |
| 552 fatal("meet not symmetric" ); | |
| 553 } | |
| 554 #endif | |
| 555 return mt; | |
| 556 } | |
| 557 | |
| 558 //------------------------------xmeet------------------------------------------ | |
| 559 // Compute the MEET of two types. It returns a new Type object. | |
| 560 const Type *Type::xmeet( const Type *t ) const { | |
| 561 // Perform a fast test for common case; meeting the same types together. | |
| 562 if( this == t ) return this; // Meeting same type-rep? | |
| 563 | |
| 564 // Meeting TOP with anything? | |
| 565 if( _base == Top ) return t; | |
| 566 | |
| 567 // Meeting BOTTOM with anything? | |
| 568 if( _base == Bottom ) return BOTTOM; | |
| 569 | |
| 570 // Current "this->_base" is one of: Bad, Multi, Control, Top, | |
| 571 // Abio, Abstore, Floatxxx, Doublexxx, Bottom, lastype. | |
| 572 switch (t->base()) { // Switch on original type | |
| 573 | |
| 574 // Cut in half the number of cases I must handle. Only need cases for when | |
| 575 // the given enum "t->type" is less than or equal to the local enum "type". | |
| 576 case FloatCon: | |
| 577 case DoubleCon: | |
| 578 case Int: | |
| 579 case Long: | |
| 580 return t->xmeet(this); | |
| 581 | |
| 582 case OopPtr: | |
| 583 return t->xmeet(this); | |
| 584 | |
| 585 case InstPtr: | |
| 586 return t->xmeet(this); | |
| 587 | |
| 588 case KlassPtr: | |
| 589 return t->xmeet(this); | |
| 590 | |
| 591 case AryPtr: | |
| 592 return t->xmeet(this); | |
| 593 | |
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594 case NarrowOop: |
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595 return t->xmeet(this); |
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596 |
| 0 | 597 case Bad: // Type check |
| 598 default: // Bogus type not in lattice | |
| 599 typerr(t); | |
| 600 return Type::BOTTOM; | |
| 601 | |
| 602 case Bottom: // Ye Olde Default | |
| 603 return t; | |
| 604 | |
| 605 case FloatTop: | |
| 606 if( _base == FloatTop ) return this; | |
| 607 case FloatBot: // Float | |
| 608 if( _base == FloatBot || _base == FloatTop ) return FLOAT; | |
| 609 if( _base == DoubleTop || _base == DoubleBot ) return Type::BOTTOM; | |
| 610 typerr(t); | |
| 611 return Type::BOTTOM; | |
| 612 | |
| 613 case DoubleTop: | |
| 614 if( _base == DoubleTop ) return this; | |
| 615 case DoubleBot: // Double | |
| 616 if( _base == DoubleBot || _base == DoubleTop ) return DOUBLE; | |
| 617 if( _base == FloatTop || _base == FloatBot ) return Type::BOTTOM; | |
| 618 typerr(t); | |
| 619 return Type::BOTTOM; | |
| 620 | |
| 621 // These next few cases must match exactly or it is a compile-time error. | |
| 622 case Control: // Control of code | |
| 623 case Abio: // State of world outside of program | |
| 624 case Memory: | |
| 625 if( _base == t->_base ) return this; | |
| 626 typerr(t); | |
| 627 return Type::BOTTOM; | |
| 628 | |
| 629 case Top: // Top of the lattice | |
| 630 return this; | |
| 631 } | |
| 632 | |
| 633 // The type is unchanged | |
| 634 return this; | |
| 635 } | |
| 636 | |
| 637 //-----------------------------filter------------------------------------------ | |
| 638 const Type *Type::filter( const Type *kills ) const { | |
| 639 const Type* ft = join(kills); | |
| 640 if (ft->empty()) | |
| 641 return Type::TOP; // Canonical empty value | |
| 642 return ft; | |
| 643 } | |
| 644 | |
| 645 //------------------------------xdual------------------------------------------ | |
| 646 // Compute dual right now. | |
| 647 const Type::TYPES Type::dual_type[Type::lastype] = { | |
| 648 Bad, // Bad | |
| 649 Control, // Control | |
| 650 Bottom, // Top | |
| 651 Bad, // Int - handled in v-call | |
| 652 Bad, // Long - handled in v-call | |
| 653 Half, // Half | |
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654 Bad, // NarrowOop - handled in v-call |
| 0 | 655 |
| 656 Bad, // Tuple - handled in v-call | |
| 657 Bad, // Array - handled in v-call | |
| 658 | |
| 659 Bad, // AnyPtr - handled in v-call | |
| 660 Bad, // RawPtr - handled in v-call | |
| 661 Bad, // OopPtr - handled in v-call | |
| 662 Bad, // InstPtr - handled in v-call | |
| 663 Bad, // AryPtr - handled in v-call | |
| 664 Bad, // KlassPtr - handled in v-call | |
| 665 | |
| 666 Bad, // Function - handled in v-call | |
| 667 Abio, // Abio | |
| 668 Return_Address,// Return_Address | |
| 669 Memory, // Memory | |
| 670 FloatBot, // FloatTop | |
| 671 FloatCon, // FloatCon | |
| 672 FloatTop, // FloatBot | |
| 673 DoubleBot, // DoubleTop | |
| 674 DoubleCon, // DoubleCon | |
| 675 DoubleTop, // DoubleBot | |
| 676 Top // Bottom | |
| 677 }; | |
| 678 | |
| 679 const Type *Type::xdual() const { | |
| 680 // Note: the base() accessor asserts the sanity of _base. | |
| 681 assert(dual_type[base()] != Bad, "implement with v-call"); | |
| 682 return new Type(dual_type[_base]); | |
| 683 } | |
| 684 | |
| 685 //------------------------------has_memory------------------------------------- | |
| 686 bool Type::has_memory() const { | |
| 687 Type::TYPES tx = base(); | |
| 688 if (tx == Memory) return true; | |
| 689 if (tx == Tuple) { | |
| 690 const TypeTuple *t = is_tuple(); | |
| 691 for (uint i=0; i < t->cnt(); i++) { | |
| 692 tx = t->field_at(i)->base(); | |
| 693 if (tx == Memory) return true; | |
| 694 } | |
| 695 } | |
| 696 return false; | |
| 697 } | |
| 698 | |
| 699 #ifndef PRODUCT | |
| 700 //------------------------------dump2------------------------------------------ | |
| 701 void Type::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 702 st->print(msg[_base]); | |
| 703 } | |
| 704 | |
| 705 //------------------------------dump------------------------------------------- | |
| 706 void Type::dump_on(outputStream *st) const { | |
| 707 ResourceMark rm; | |
| 708 Dict d(cmpkey,hashkey); // Stop recursive type dumping | |
| 709 dump2(d,1, st); | |
| 163 | 710 if (is_ptr_to_narrowoop()) { |
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711 st->print(" [narrow]"); |
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712 } |
| 0 | 713 } |
| 714 | |
| 715 //------------------------------data------------------------------------------- | |
| 716 const char * const Type::msg[Type::lastype] = { | |
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717 "bad","control","top","int:","long:","half", "narrowoop:", |
| 0 | 718 "tuple:", "aryptr", |
| 719 "anyptr:", "rawptr:", "java:", "inst:", "ary:", "klass:", | |
| 720 "func", "abIO", "return_address", "memory", | |
| 721 "float_top", "ftcon:", "float", | |
| 722 "double_top", "dblcon:", "double", | |
| 723 "bottom" | |
| 724 }; | |
| 725 #endif | |
| 726 | |
| 727 //------------------------------singleton-------------------------------------- | |
| 728 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
| 729 // constants (Ldi nodes). Singletons are integer, float or double constants. | |
| 730 bool Type::singleton(void) const { | |
| 731 return _base == Top || _base == Half; | |
| 732 } | |
| 733 | |
| 734 //------------------------------empty------------------------------------------ | |
| 735 // TRUE if Type is a type with no values, FALSE otherwise. | |
| 736 bool Type::empty(void) const { | |
| 737 switch (_base) { | |
| 738 case DoubleTop: | |
| 739 case FloatTop: | |
| 740 case Top: | |
| 741 return true; | |
| 742 | |
| 743 case Half: | |
| 744 case Abio: | |
| 745 case Return_Address: | |
| 746 case Memory: | |
| 747 case Bottom: | |
| 748 case FloatBot: | |
| 749 case DoubleBot: | |
| 750 return false; // never a singleton, therefore never empty | |
| 751 } | |
| 752 | |
| 753 ShouldNotReachHere(); | |
| 754 return false; | |
| 755 } | |
| 756 | |
| 757 //------------------------------dump_stats------------------------------------- | |
| 758 // Dump collected statistics to stderr | |
| 759 #ifndef PRODUCT | |
| 760 void Type::dump_stats() { | |
| 761 tty->print("Types made: %d\n", type_dict()->Size()); | |
| 762 } | |
| 763 #endif | |
| 764 | |
| 765 //------------------------------typerr----------------------------------------- | |
| 766 void Type::typerr( const Type *t ) const { | |
| 767 #ifndef PRODUCT | |
| 768 tty->print("\nError mixing types: "); | |
| 769 dump(); | |
| 770 tty->print(" and "); | |
| 771 t->dump(); | |
| 772 tty->print("\n"); | |
| 773 #endif | |
| 774 ShouldNotReachHere(); | |
| 775 } | |
| 776 | |
| 777 //------------------------------isa_oop_ptr------------------------------------ | |
| 778 // Return true if type is an oop pointer type. False for raw pointers. | |
| 779 static char isa_oop_ptr_tbl[Type::lastype] = { | |
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780 0,0,0,0,0,0,0/*narrowoop*/,0/*tuple*/, 0/*ary*/, |
| 0 | 781 0/*anyptr*/,0/*rawptr*/,1/*OopPtr*/,1/*InstPtr*/,1/*AryPtr*/,1/*KlassPtr*/, |
| 782 0/*func*/,0,0/*return_address*/,0, | |
| 783 /*floats*/0,0,0, /*doubles*/0,0,0, | |
| 784 0 | |
| 785 }; | |
| 786 bool Type::isa_oop_ptr() const { | |
| 787 return isa_oop_ptr_tbl[_base] != 0; | |
| 788 } | |
| 789 | |
| 790 //------------------------------dump_stats------------------------------------- | |
| 791 // // Check that arrays match type enum | |
| 792 #ifndef PRODUCT | |
| 793 void Type::verify_lastype() { | |
| 794 // Check that arrays match enumeration | |
| 795 assert( Type::dual_type [Type::lastype - 1] == Type::Top, "did not update array"); | |
| 796 assert( strcmp(Type::msg [Type::lastype - 1],"bottom") == 0, "did not update array"); | |
| 797 // assert( PhiNode::tbl [Type::lastype - 1] == NULL, "did not update array"); | |
| 798 assert( Matcher::base2reg[Type::lastype - 1] == 0, "did not update array"); | |
| 799 assert( isa_oop_ptr_tbl [Type::lastype - 1] == (char)0, "did not update array"); | |
| 800 } | |
| 801 #endif | |
| 802 | |
| 803 //============================================================================= | |
| 804 // Convenience common pre-built types. | |
| 805 const TypeF *TypeF::ZERO; // Floating point zero | |
| 806 const TypeF *TypeF::ONE; // Floating point one | |
| 807 | |
| 808 //------------------------------make------------------------------------------- | |
| 809 // Create a float constant | |
| 810 const TypeF *TypeF::make(float f) { | |
| 811 return (TypeF*)(new TypeF(f))->hashcons(); | |
| 812 } | |
| 813 | |
| 814 //------------------------------meet------------------------------------------- | |
| 815 // Compute the MEET of two types. It returns a new Type object. | |
| 816 const Type *TypeF::xmeet( const Type *t ) const { | |
| 817 // Perform a fast test for common case; meeting the same types together. | |
| 818 if( this == t ) return this; // Meeting same type-rep? | |
| 819 | |
| 820 // Current "this->_base" is FloatCon | |
| 821 switch (t->base()) { // Switch on original type | |
| 822 case AnyPtr: // Mixing with oops happens when javac | |
| 823 case RawPtr: // reuses local variables | |
| 824 case OopPtr: | |
| 825 case InstPtr: | |
| 826 case KlassPtr: | |
| 827 case AryPtr: | |
| 828 case Int: | |
| 829 case Long: | |
| 830 case DoubleTop: | |
| 831 case DoubleCon: | |
| 832 case DoubleBot: | |
| 833 case Bottom: // Ye Olde Default | |
| 834 return Type::BOTTOM; | |
| 835 | |
| 836 case FloatBot: | |
| 837 return t; | |
| 838 | |
| 839 default: // All else is a mistake | |
| 840 typerr(t); | |
| 841 | |
| 842 case FloatCon: // Float-constant vs Float-constant? | |
| 843 if( jint_cast(_f) != jint_cast(t->getf()) ) // unequal constants? | |
| 844 // must compare bitwise as positive zero, negative zero and NaN have | |
| 845 // all the same representation in C++ | |
| 846 return FLOAT; // Return generic float | |
| 847 // Equal constants | |
| 848 case Top: | |
| 849 case FloatTop: | |
| 850 break; // Return the float constant | |
| 851 } | |
| 852 return this; // Return the float constant | |
| 853 } | |
| 854 | |
| 855 //------------------------------xdual------------------------------------------ | |
| 856 // Dual: symmetric | |
| 857 const Type *TypeF::xdual() const { | |
| 858 return this; | |
| 859 } | |
| 860 | |
| 861 //------------------------------eq--------------------------------------------- | |
| 862 // Structural equality check for Type representations | |
| 863 bool TypeF::eq( const Type *t ) const { | |
| 864 if( g_isnan(_f) || | |
| 865 g_isnan(t->getf()) ) { | |
| 866 // One or both are NANs. If both are NANs return true, else false. | |
| 867 return (g_isnan(_f) && g_isnan(t->getf())); | |
| 868 } | |
| 869 if (_f == t->getf()) { | |
| 870 // (NaN is impossible at this point, since it is not equal even to itself) | |
| 871 if (_f == 0.0) { | |
| 872 // difference between positive and negative zero | |
| 873 if (jint_cast(_f) != jint_cast(t->getf())) return false; | |
| 874 } | |
| 875 return true; | |
| 876 } | |
| 877 return false; | |
| 878 } | |
| 879 | |
| 880 //------------------------------hash------------------------------------------- | |
| 881 // Type-specific hashing function. | |
| 882 int TypeF::hash(void) const { | |
| 883 return *(int*)(&_f); | |
| 884 } | |
| 885 | |
| 886 //------------------------------is_finite-------------------------------------- | |
| 887 // Has a finite value | |
| 888 bool TypeF::is_finite() const { | |
| 889 return g_isfinite(getf()) != 0; | |
| 890 } | |
| 891 | |
| 892 //------------------------------is_nan----------------------------------------- | |
| 893 // Is not a number (NaN) | |
| 894 bool TypeF::is_nan() const { | |
| 895 return g_isnan(getf()) != 0; | |
| 896 } | |
| 897 | |
| 898 //------------------------------dump2------------------------------------------ | |
| 899 // Dump float constant Type | |
| 900 #ifndef PRODUCT | |
| 901 void TypeF::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 902 Type::dump2(d,depth, st); | |
| 903 st->print("%f", _f); | |
| 904 } | |
| 905 #endif | |
| 906 | |
| 907 //------------------------------singleton-------------------------------------- | |
| 908 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
| 909 // constants (Ldi nodes). Singletons are integer, float or double constants | |
| 910 // or a single symbol. | |
| 911 bool TypeF::singleton(void) const { | |
| 912 return true; // Always a singleton | |
| 913 } | |
| 914 | |
| 915 bool TypeF::empty(void) const { | |
| 916 return false; // always exactly a singleton | |
| 917 } | |
| 918 | |
| 919 //============================================================================= | |
| 920 // Convenience common pre-built types. | |
| 921 const TypeD *TypeD::ZERO; // Floating point zero | |
| 922 const TypeD *TypeD::ONE; // Floating point one | |
| 923 | |
| 924 //------------------------------make------------------------------------------- | |
| 925 const TypeD *TypeD::make(double d) { | |
| 926 return (TypeD*)(new TypeD(d))->hashcons(); | |
| 927 } | |
| 928 | |
| 929 //------------------------------meet------------------------------------------- | |
| 930 // Compute the MEET of two types. It returns a new Type object. | |
| 931 const Type *TypeD::xmeet( const Type *t ) const { | |
| 932 // Perform a fast test for common case; meeting the same types together. | |
| 933 if( this == t ) return this; // Meeting same type-rep? | |
| 934 | |
| 935 // Current "this->_base" is DoubleCon | |
| 936 switch (t->base()) { // Switch on original type | |
| 937 case AnyPtr: // Mixing with oops happens when javac | |
| 938 case RawPtr: // reuses local variables | |
| 939 case OopPtr: | |
| 940 case InstPtr: | |
| 941 case KlassPtr: | |
| 942 case AryPtr: | |
|
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943 case NarrowOop: |
| 0 | 944 case Int: |
| 945 case Long: | |
| 946 case FloatTop: | |
| 947 case FloatCon: | |
| 948 case FloatBot: | |
| 949 case Bottom: // Ye Olde Default | |
| 950 return Type::BOTTOM; | |
| 951 | |
| 952 case DoubleBot: | |
| 953 return t; | |
| 954 | |
| 955 default: // All else is a mistake | |
| 956 typerr(t); | |
| 957 | |
| 958 case DoubleCon: // Double-constant vs Double-constant? | |
| 959 if( jlong_cast(_d) != jlong_cast(t->getd()) ) // unequal constants? (see comment in TypeF::xmeet) | |
| 960 return DOUBLE; // Return generic double | |
| 961 case Top: | |
| 962 case DoubleTop: | |
| 963 break; | |
| 964 } | |
| 965 return this; // Return the double constant | |
| 966 } | |
| 967 | |
| 968 //------------------------------xdual------------------------------------------ | |
| 969 // Dual: symmetric | |
| 970 const Type *TypeD::xdual() const { | |
| 971 return this; | |
| 972 } | |
| 973 | |
| 974 //------------------------------eq--------------------------------------------- | |
| 975 // Structural equality check for Type representations | |
| 976 bool TypeD::eq( const Type *t ) const { | |
| 977 if( g_isnan(_d) || | |
| 978 g_isnan(t->getd()) ) { | |
| 979 // One or both are NANs. If both are NANs return true, else false. | |
| 980 return (g_isnan(_d) && g_isnan(t->getd())); | |
| 981 } | |
| 982 if (_d == t->getd()) { | |
| 983 // (NaN is impossible at this point, since it is not equal even to itself) | |
| 984 if (_d == 0.0) { | |
| 985 // difference between positive and negative zero | |
| 986 if (jlong_cast(_d) != jlong_cast(t->getd())) return false; | |
| 987 } | |
| 988 return true; | |
| 989 } | |
| 990 return false; | |
| 991 } | |
| 992 | |
| 993 //------------------------------hash------------------------------------------- | |
| 994 // Type-specific hashing function. | |
| 995 int TypeD::hash(void) const { | |
| 996 return *(int*)(&_d); | |
| 997 } | |
| 998 | |
| 999 //------------------------------is_finite-------------------------------------- | |
| 1000 // Has a finite value | |
| 1001 bool TypeD::is_finite() const { | |
| 1002 return g_isfinite(getd()) != 0; | |
| 1003 } | |
| 1004 | |
| 1005 //------------------------------is_nan----------------------------------------- | |
| 1006 // Is not a number (NaN) | |
| 1007 bool TypeD::is_nan() const { | |
| 1008 return g_isnan(getd()) != 0; | |
| 1009 } | |
| 1010 | |
| 1011 //------------------------------dump2------------------------------------------ | |
| 1012 // Dump double constant Type | |
| 1013 #ifndef PRODUCT | |
| 1014 void TypeD::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 1015 Type::dump2(d,depth,st); | |
| 1016 st->print("%f", _d); | |
| 1017 } | |
| 1018 #endif | |
| 1019 | |
| 1020 //------------------------------singleton-------------------------------------- | |
| 1021 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
| 1022 // constants (Ldi nodes). Singletons are integer, float or double constants | |
| 1023 // or a single symbol. | |
| 1024 bool TypeD::singleton(void) const { | |
| 1025 return true; // Always a singleton | |
| 1026 } | |
| 1027 | |
| 1028 bool TypeD::empty(void) const { | |
| 1029 return false; // always exactly a singleton | |
| 1030 } | |
| 1031 | |
| 1032 //============================================================================= | |
| 1033 // Convience common pre-built types. | |
| 1034 const TypeInt *TypeInt::MINUS_1;// -1 | |
| 1035 const TypeInt *TypeInt::ZERO; // 0 | |
| 1036 const TypeInt *TypeInt::ONE; // 1 | |
| 1037 const TypeInt *TypeInt::BOOL; // 0 or 1, FALSE or TRUE. | |
| 1038 const TypeInt *TypeInt::CC; // -1,0 or 1, condition codes | |
| 1039 const TypeInt *TypeInt::CC_LT; // [-1] == MINUS_1 | |
| 1040 const TypeInt *TypeInt::CC_GT; // [1] == ONE | |
| 1041 const TypeInt *TypeInt::CC_EQ; // [0] == ZERO | |
| 1042 const TypeInt *TypeInt::CC_LE; // [-1,0] | |
| 1043 const TypeInt *TypeInt::CC_GE; // [0,1] == BOOL (!) | |
| 1044 const TypeInt *TypeInt::BYTE; // Bytes, -128 to 127 | |
| 1045 const TypeInt *TypeInt::CHAR; // Java chars, 0-65535 | |
| 1046 const TypeInt *TypeInt::SHORT; // Java shorts, -32768-32767 | |
| 1047 const TypeInt *TypeInt::POS; // Positive 32-bit integers or zero | |
| 1048 const TypeInt *TypeInt::POS1; // Positive 32-bit integers | |
| 1049 const TypeInt *TypeInt::INT; // 32-bit integers | |
| 1050 const TypeInt *TypeInt::SYMINT; // symmetric range [-max_jint..max_jint] | |
| 1051 | |
| 1052 //------------------------------TypeInt---------------------------------------- | |
| 1053 TypeInt::TypeInt( jint lo, jint hi, int w ) : Type(Int), _lo(lo), _hi(hi), _widen(w) { | |
| 1054 } | |
| 1055 | |
| 1056 //------------------------------make------------------------------------------- | |
| 1057 const TypeInt *TypeInt::make( jint lo ) { | |
| 1058 return (TypeInt*)(new TypeInt(lo,lo,WidenMin))->hashcons(); | |
| 1059 } | |
| 1060 | |
| 1061 #define SMALLINT ((juint)3) // a value too insignificant to consider widening | |
| 1062 | |
| 1063 const TypeInt *TypeInt::make( jint lo, jint hi, int w ) { | |
| 1064 // Certain normalizations keep us sane when comparing types. | |
| 1065 // The 'SMALLINT' covers constants and also CC and its relatives. | |
| 1066 assert(CC == NULL || (juint)(CC->_hi - CC->_lo) <= SMALLINT, "CC is truly small"); | |
| 1067 if (lo <= hi) { | |
| 1068 if ((juint)(hi - lo) <= SMALLINT) w = Type::WidenMin; | |
| 1069 if ((juint)(hi - lo) >= max_juint) w = Type::WidenMax; // plain int | |
| 1070 } | |
| 1071 return (TypeInt*)(new TypeInt(lo,hi,w))->hashcons(); | |
| 1072 } | |
| 1073 | |
| 1074 //------------------------------meet------------------------------------------- | |
| 1075 // Compute the MEET of two types. It returns a new Type representation object | |
| 1076 // with reference count equal to the number of Types pointing at it. | |
| 1077 // Caller should wrap a Types around it. | |
| 1078 const Type *TypeInt::xmeet( const Type *t ) const { | |
| 1079 // Perform a fast test for common case; meeting the same types together. | |
| 1080 if( this == t ) return this; // Meeting same type? | |
| 1081 | |
| 1082 // Currently "this->_base" is a TypeInt | |
| 1083 switch (t->base()) { // Switch on original type | |
| 1084 case AnyPtr: // Mixing with oops happens when javac | |
| 1085 case RawPtr: // reuses local variables | |
| 1086 case OopPtr: | |
| 1087 case InstPtr: | |
| 1088 case KlassPtr: | |
| 1089 case AryPtr: | |
|
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1090 case NarrowOop: |
| 0 | 1091 case Long: |
| 1092 case FloatTop: | |
| 1093 case FloatCon: | |
| 1094 case FloatBot: | |
| 1095 case DoubleTop: | |
| 1096 case DoubleCon: | |
| 1097 case DoubleBot: | |
| 1098 case Bottom: // Ye Olde Default | |
| 1099 return Type::BOTTOM; | |
| 1100 default: // All else is a mistake | |
| 1101 typerr(t); | |
| 1102 case Top: // No change | |
| 1103 return this; | |
| 1104 case Int: // Int vs Int? | |
| 1105 break; | |
| 1106 } | |
| 1107 | |
| 1108 // Expand covered set | |
| 1109 const TypeInt *r = t->is_int(); | |
| 1110 // (Avoid TypeInt::make, to avoid the argument normalizations it enforces.) | |
| 1111 return (new TypeInt( MIN2(_lo,r->_lo), MAX2(_hi,r->_hi), MAX2(_widen,r->_widen) ))->hashcons(); | |
| 1112 } | |
| 1113 | |
| 1114 //------------------------------xdual------------------------------------------ | |
| 1115 // Dual: reverse hi & lo; flip widen | |
| 1116 const Type *TypeInt::xdual() const { | |
| 1117 return new TypeInt(_hi,_lo,WidenMax-_widen); | |
| 1118 } | |
| 1119 | |
| 1120 //------------------------------widen------------------------------------------ | |
| 1121 // Only happens for optimistic top-down optimizations. | |
| 1122 const Type *TypeInt::widen( const Type *old ) const { | |
| 1123 // Coming from TOP or such; no widening | |
| 1124 if( old->base() != Int ) return this; | |
| 1125 const TypeInt *ot = old->is_int(); | |
| 1126 | |
| 1127 // If new guy is equal to old guy, no widening | |
| 1128 if( _lo == ot->_lo && _hi == ot->_hi ) | |
| 1129 return old; | |
| 1130 | |
| 1131 // If new guy contains old, then we widened | |
| 1132 if( _lo <= ot->_lo && _hi >= ot->_hi ) { | |
| 1133 // New contains old | |
| 1134 // If new guy is already wider than old, no widening | |
| 1135 if( _widen > ot->_widen ) return this; | |
| 1136 // If old guy was a constant, do not bother | |
| 1137 if (ot->_lo == ot->_hi) return this; | |
| 1138 // Now widen new guy. | |
| 1139 // Check for widening too far | |
| 1140 if (_widen == WidenMax) { | |
| 1141 if (min_jint < _lo && _hi < max_jint) { | |
| 1142 // If neither endpoint is extremal yet, push out the endpoint | |
| 1143 // which is closer to its respective limit. | |
| 1144 if (_lo >= 0 || // easy common case | |
| 1145 (juint)(_lo - min_jint) >= (juint)(max_jint - _hi)) { | |
| 1146 // Try to widen to an unsigned range type of 31 bits: | |
| 1147 return make(_lo, max_jint, WidenMax); | |
| 1148 } else { | |
| 1149 return make(min_jint, _hi, WidenMax); | |
| 1150 } | |
| 1151 } | |
| 1152 return TypeInt::INT; | |
| 1153 } | |
| 1154 // Returned widened new guy | |
| 1155 return make(_lo,_hi,_widen+1); | |
| 1156 } | |
| 1157 | |
| 1158 // If old guy contains new, then we probably widened too far & dropped to | |
| 1159 // bottom. Return the wider fellow. | |
| 1160 if ( ot->_lo <= _lo && ot->_hi >= _hi ) | |
| 1161 return old; | |
| 1162 | |
| 1163 //fatal("Integer value range is not subset"); | |
| 1164 //return this; | |
| 1165 return TypeInt::INT; | |
| 1166 } | |
| 1167 | |
| 1168 //------------------------------narrow--------------------------------------- | |
| 1169 // Only happens for pessimistic optimizations. | |
| 1170 const Type *TypeInt::narrow( const Type *old ) const { | |
| 1171 if (_lo >= _hi) return this; // already narrow enough | |
| 1172 if (old == NULL) return this; | |
| 1173 const TypeInt* ot = old->isa_int(); | |
| 1174 if (ot == NULL) return this; | |
| 1175 jint olo = ot->_lo; | |
| 1176 jint ohi = ot->_hi; | |
| 1177 | |
| 1178 // If new guy is equal to old guy, no narrowing | |
| 1179 if (_lo == olo && _hi == ohi) return old; | |
| 1180 | |
| 1181 // If old guy was maximum range, allow the narrowing | |
| 1182 if (olo == min_jint && ohi == max_jint) return this; | |
| 1183 | |
| 1184 if (_lo < olo || _hi > ohi) | |
| 1185 return this; // doesn't narrow; pretty wierd | |
| 1186 | |
| 1187 // The new type narrows the old type, so look for a "death march". | |
| 1188 // See comments on PhaseTransform::saturate. | |
| 1189 juint nrange = _hi - _lo; | |
| 1190 juint orange = ohi - olo; | |
| 1191 if (nrange < max_juint - 1 && nrange > (orange >> 1) + (SMALLINT*2)) { | |
| 1192 // Use the new type only if the range shrinks a lot. | |
| 1193 // We do not want the optimizer computing 2^31 point by point. | |
| 1194 return old; | |
| 1195 } | |
| 1196 | |
| 1197 return this; | |
| 1198 } | |
| 1199 | |
| 1200 //-----------------------------filter------------------------------------------ | |
| 1201 const Type *TypeInt::filter( const Type *kills ) const { | |
| 1202 const TypeInt* ft = join(kills)->isa_int(); | |
| 1203 if (ft == NULL || ft->_lo > ft->_hi) | |
| 1204 return Type::TOP; // Canonical empty value | |
| 1205 if (ft->_widen < this->_widen) { | |
| 1206 // Do not allow the value of kill->_widen to affect the outcome. | |
| 1207 // The widen bits must be allowed to run freely through the graph. | |
| 1208 ft = TypeInt::make(ft->_lo, ft->_hi, this->_widen); | |
| 1209 } | |
| 1210 return ft; | |
| 1211 } | |
| 1212 | |
| 1213 //------------------------------eq--------------------------------------------- | |
| 1214 // Structural equality check for Type representations | |
| 1215 bool TypeInt::eq( const Type *t ) const { | |
| 1216 const TypeInt *r = t->is_int(); // Handy access | |
| 1217 return r->_lo == _lo && r->_hi == _hi && r->_widen == _widen; | |
| 1218 } | |
| 1219 | |
| 1220 //------------------------------hash------------------------------------------- | |
| 1221 // Type-specific hashing function. | |
| 1222 int TypeInt::hash(void) const { | |
| 1223 return _lo+_hi+_widen+(int)Type::Int; | |
| 1224 } | |
| 1225 | |
| 1226 //------------------------------is_finite-------------------------------------- | |
| 1227 // Has a finite value | |
| 1228 bool TypeInt::is_finite() const { | |
| 1229 return true; | |
| 1230 } | |
| 1231 | |
| 1232 //------------------------------dump2------------------------------------------ | |
| 1233 // Dump TypeInt | |
| 1234 #ifndef PRODUCT | |
| 1235 static const char* intname(char* buf, jint n) { | |
| 1236 if (n == min_jint) | |
| 1237 return "min"; | |
| 1238 else if (n < min_jint + 10000) | |
| 1239 sprintf(buf, "min+" INT32_FORMAT, n - min_jint); | |
| 1240 else if (n == max_jint) | |
| 1241 return "max"; | |
| 1242 else if (n > max_jint - 10000) | |
| 1243 sprintf(buf, "max-" INT32_FORMAT, max_jint - n); | |
| 1244 else | |
| 1245 sprintf(buf, INT32_FORMAT, n); | |
| 1246 return buf; | |
| 1247 } | |
| 1248 | |
| 1249 void TypeInt::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 1250 char buf[40], buf2[40]; | |
| 1251 if (_lo == min_jint && _hi == max_jint) | |
| 1252 st->print("int"); | |
| 1253 else if (is_con()) | |
| 1254 st->print("int:%s", intname(buf, get_con())); | |
| 1255 else if (_lo == BOOL->_lo && _hi == BOOL->_hi) | |
| 1256 st->print("bool"); | |
| 1257 else if (_lo == BYTE->_lo && _hi == BYTE->_hi) | |
| 1258 st->print("byte"); | |
| 1259 else if (_lo == CHAR->_lo && _hi == CHAR->_hi) | |
| 1260 st->print("char"); | |
| 1261 else if (_lo == SHORT->_lo && _hi == SHORT->_hi) | |
| 1262 st->print("short"); | |
| 1263 else if (_hi == max_jint) | |
| 1264 st->print("int:>=%s", intname(buf, _lo)); | |
| 1265 else if (_lo == min_jint) | |
| 1266 st->print("int:<=%s", intname(buf, _hi)); | |
| 1267 else | |
| 1268 st->print("int:%s..%s", intname(buf, _lo), intname(buf2, _hi)); | |
| 1269 | |
| 1270 if (_widen != 0 && this != TypeInt::INT) | |
| 1271 st->print(":%.*s", _widen, "wwww"); | |
| 1272 } | |
| 1273 #endif | |
| 1274 | |
| 1275 //------------------------------singleton-------------------------------------- | |
| 1276 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
| 1277 // constants. | |
| 1278 bool TypeInt::singleton(void) const { | |
| 1279 return _lo >= _hi; | |
| 1280 } | |
| 1281 | |
| 1282 bool TypeInt::empty(void) const { | |
| 1283 return _lo > _hi; | |
| 1284 } | |
| 1285 | |
| 1286 //============================================================================= | |
| 1287 // Convenience common pre-built types. | |
| 1288 const TypeLong *TypeLong::MINUS_1;// -1 | |
| 1289 const TypeLong *TypeLong::ZERO; // 0 | |
| 1290 const TypeLong *TypeLong::ONE; // 1 | |
| 1291 const TypeLong *TypeLong::POS; // >=0 | |
| 1292 const TypeLong *TypeLong::LONG; // 64-bit integers | |
| 1293 const TypeLong *TypeLong::INT; // 32-bit subrange | |
| 1294 const TypeLong *TypeLong::UINT; // 32-bit unsigned subrange | |
| 1295 | |
| 1296 //------------------------------TypeLong--------------------------------------- | |
| 1297 TypeLong::TypeLong( jlong lo, jlong hi, int w ) : Type(Long), _lo(lo), _hi(hi), _widen(w) { | |
| 1298 } | |
| 1299 | |
| 1300 //------------------------------make------------------------------------------- | |
| 1301 const TypeLong *TypeLong::make( jlong lo ) { | |
| 1302 return (TypeLong*)(new TypeLong(lo,lo,WidenMin))->hashcons(); | |
| 1303 } | |
| 1304 | |
| 1305 const TypeLong *TypeLong::make( jlong lo, jlong hi, int w ) { | |
| 1306 // Certain normalizations keep us sane when comparing types. | |
| 1307 // The '1' covers constants. | |
| 1308 if (lo <= hi) { | |
| 1309 if ((julong)(hi - lo) <= SMALLINT) w = Type::WidenMin; | |
| 1310 if ((julong)(hi - lo) >= max_julong) w = Type::WidenMax; // plain long | |
| 1311 } | |
| 1312 return (TypeLong*)(new TypeLong(lo,hi,w))->hashcons(); | |
| 1313 } | |
| 1314 | |
| 1315 | |
| 1316 //------------------------------meet------------------------------------------- | |
| 1317 // Compute the MEET of two types. It returns a new Type representation object | |
| 1318 // with reference count equal to the number of Types pointing at it. | |
| 1319 // Caller should wrap a Types around it. | |
| 1320 const Type *TypeLong::xmeet( const Type *t ) const { | |
| 1321 // Perform a fast test for common case; meeting the same types together. | |
| 1322 if( this == t ) return this; // Meeting same type? | |
| 1323 | |
| 1324 // Currently "this->_base" is a TypeLong | |
| 1325 switch (t->base()) { // Switch on original type | |
| 1326 case AnyPtr: // Mixing with oops happens when javac | |
| 1327 case RawPtr: // reuses local variables | |
| 1328 case OopPtr: | |
| 1329 case InstPtr: | |
| 1330 case KlassPtr: | |
| 1331 case AryPtr: | |
|
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1332 case NarrowOop: |
| 0 | 1333 case Int: |
| 1334 case FloatTop: | |
| 1335 case FloatCon: | |
| 1336 case FloatBot: | |
| 1337 case DoubleTop: | |
| 1338 case DoubleCon: | |
| 1339 case DoubleBot: | |
| 1340 case Bottom: // Ye Olde Default | |
| 1341 return Type::BOTTOM; | |
| 1342 default: // All else is a mistake | |
| 1343 typerr(t); | |
| 1344 case Top: // No change | |
| 1345 return this; | |
| 1346 case Long: // Long vs Long? | |
| 1347 break; | |
| 1348 } | |
| 1349 | |
| 1350 // Expand covered set | |
| 1351 const TypeLong *r = t->is_long(); // Turn into a TypeLong | |
| 1352 // (Avoid TypeLong::make, to avoid the argument normalizations it enforces.) | |
| 1353 return (new TypeLong( MIN2(_lo,r->_lo), MAX2(_hi,r->_hi), MAX2(_widen,r->_widen) ))->hashcons(); | |
| 1354 } | |
| 1355 | |
| 1356 //------------------------------xdual------------------------------------------ | |
| 1357 // Dual: reverse hi & lo; flip widen | |
| 1358 const Type *TypeLong::xdual() const { | |
| 1359 return new TypeLong(_hi,_lo,WidenMax-_widen); | |
| 1360 } | |
| 1361 | |
| 1362 //------------------------------widen------------------------------------------ | |
| 1363 // Only happens for optimistic top-down optimizations. | |
| 1364 const Type *TypeLong::widen( const Type *old ) const { | |
| 1365 // Coming from TOP or such; no widening | |
| 1366 if( old->base() != Long ) return this; | |
| 1367 const TypeLong *ot = old->is_long(); | |
| 1368 | |
| 1369 // If new guy is equal to old guy, no widening | |
| 1370 if( _lo == ot->_lo && _hi == ot->_hi ) | |
| 1371 return old; | |
| 1372 | |
| 1373 // If new guy contains old, then we widened | |
| 1374 if( _lo <= ot->_lo && _hi >= ot->_hi ) { | |
| 1375 // New contains old | |
| 1376 // If new guy is already wider than old, no widening | |
| 1377 if( _widen > ot->_widen ) return this; | |
| 1378 // If old guy was a constant, do not bother | |
| 1379 if (ot->_lo == ot->_hi) return this; | |
| 1380 // Now widen new guy. | |
| 1381 // Check for widening too far | |
| 1382 if (_widen == WidenMax) { | |
| 1383 if (min_jlong < _lo && _hi < max_jlong) { | |
| 1384 // If neither endpoint is extremal yet, push out the endpoint | |
| 1385 // which is closer to its respective limit. | |
| 1386 if (_lo >= 0 || // easy common case | |
| 1387 (julong)(_lo - min_jlong) >= (julong)(max_jlong - _hi)) { | |
| 1388 // Try to widen to an unsigned range type of 32/63 bits: | |
| 1389 if (_hi < max_juint) | |
| 1390 return make(_lo, max_juint, WidenMax); | |
| 1391 else | |
| 1392 return make(_lo, max_jlong, WidenMax); | |
| 1393 } else { | |
| 1394 return make(min_jlong, _hi, WidenMax); | |
| 1395 } | |
| 1396 } | |
| 1397 return TypeLong::LONG; | |
| 1398 } | |
| 1399 // Returned widened new guy | |
| 1400 return make(_lo,_hi,_widen+1); | |
| 1401 } | |
| 1402 | |
| 1403 // If old guy contains new, then we probably widened too far & dropped to | |
| 1404 // bottom. Return the wider fellow. | |
| 1405 if ( ot->_lo <= _lo && ot->_hi >= _hi ) | |
| 1406 return old; | |
| 1407 | |
| 1408 // fatal("Long value range is not subset"); | |
| 1409 // return this; | |
| 1410 return TypeLong::LONG; | |
| 1411 } | |
| 1412 | |
| 1413 //------------------------------narrow---------------------------------------- | |
| 1414 // Only happens for pessimistic optimizations. | |
| 1415 const Type *TypeLong::narrow( const Type *old ) const { | |
| 1416 if (_lo >= _hi) return this; // already narrow enough | |
| 1417 if (old == NULL) return this; | |
| 1418 const TypeLong* ot = old->isa_long(); | |
| 1419 if (ot == NULL) return this; | |
| 1420 jlong olo = ot->_lo; | |
| 1421 jlong ohi = ot->_hi; | |
| 1422 | |
| 1423 // If new guy is equal to old guy, no narrowing | |
| 1424 if (_lo == olo && _hi == ohi) return old; | |
| 1425 | |
| 1426 // If old guy was maximum range, allow the narrowing | |
| 1427 if (olo == min_jlong && ohi == max_jlong) return this; | |
| 1428 | |
| 1429 if (_lo < olo || _hi > ohi) | |
| 1430 return this; // doesn't narrow; pretty wierd | |
| 1431 | |
| 1432 // The new type narrows the old type, so look for a "death march". | |
| 1433 // See comments on PhaseTransform::saturate. | |
| 1434 julong nrange = _hi - _lo; | |
| 1435 julong orange = ohi - olo; | |
| 1436 if (nrange < max_julong - 1 && nrange > (orange >> 1) + (SMALLINT*2)) { | |
| 1437 // Use the new type only if the range shrinks a lot. | |
| 1438 // We do not want the optimizer computing 2^31 point by point. | |
| 1439 return old; | |
| 1440 } | |
| 1441 | |
| 1442 return this; | |
| 1443 } | |
| 1444 | |
| 1445 //-----------------------------filter------------------------------------------ | |
| 1446 const Type *TypeLong::filter( const Type *kills ) const { | |
| 1447 const TypeLong* ft = join(kills)->isa_long(); | |
| 1448 if (ft == NULL || ft->_lo > ft->_hi) | |
| 1449 return Type::TOP; // Canonical empty value | |
| 1450 if (ft->_widen < this->_widen) { | |
| 1451 // Do not allow the value of kill->_widen to affect the outcome. | |
| 1452 // The widen bits must be allowed to run freely through the graph. | |
| 1453 ft = TypeLong::make(ft->_lo, ft->_hi, this->_widen); | |
| 1454 } | |
| 1455 return ft; | |
| 1456 } | |
| 1457 | |
| 1458 //------------------------------eq--------------------------------------------- | |
| 1459 // Structural equality check for Type representations | |
| 1460 bool TypeLong::eq( const Type *t ) const { | |
| 1461 const TypeLong *r = t->is_long(); // Handy access | |
| 1462 return r->_lo == _lo && r->_hi == _hi && r->_widen == _widen; | |
| 1463 } | |
| 1464 | |
| 1465 //------------------------------hash------------------------------------------- | |
| 1466 // Type-specific hashing function. | |
| 1467 int TypeLong::hash(void) const { | |
| 1468 return (int)(_lo+_hi+_widen+(int)Type::Long); | |
| 1469 } | |
| 1470 | |
| 1471 //------------------------------is_finite-------------------------------------- | |
| 1472 // Has a finite value | |
| 1473 bool TypeLong::is_finite() const { | |
| 1474 return true; | |
| 1475 } | |
| 1476 | |
| 1477 //------------------------------dump2------------------------------------------ | |
| 1478 // Dump TypeLong | |
| 1479 #ifndef PRODUCT | |
| 1480 static const char* longnamenear(jlong x, const char* xname, char* buf, jlong n) { | |
| 1481 if (n > x) { | |
| 1482 if (n >= x + 10000) return NULL; | |
| 1483 sprintf(buf, "%s+" INT64_FORMAT, xname, n - x); | |
| 1484 } else if (n < x) { | |
| 1485 if (n <= x - 10000) return NULL; | |
| 1486 sprintf(buf, "%s-" INT64_FORMAT, xname, x - n); | |
| 1487 } else { | |
| 1488 return xname; | |
| 1489 } | |
| 1490 return buf; | |
| 1491 } | |
| 1492 | |
| 1493 static const char* longname(char* buf, jlong n) { | |
| 1494 const char* str; | |
| 1495 if (n == min_jlong) | |
| 1496 return "min"; | |
| 1497 else if (n < min_jlong + 10000) | |
| 1498 sprintf(buf, "min+" INT64_FORMAT, n - min_jlong); | |
| 1499 else if (n == max_jlong) | |
| 1500 return "max"; | |
| 1501 else if (n > max_jlong - 10000) | |
| 1502 sprintf(buf, "max-" INT64_FORMAT, max_jlong - n); | |
| 1503 else if ((str = longnamenear(max_juint, "maxuint", buf, n)) != NULL) | |
| 1504 return str; | |
| 1505 else if ((str = longnamenear(max_jint, "maxint", buf, n)) != NULL) | |
| 1506 return str; | |
| 1507 else if ((str = longnamenear(min_jint, "minint", buf, n)) != NULL) | |
| 1508 return str; | |
| 1509 else | |
| 1510 sprintf(buf, INT64_FORMAT, n); | |
| 1511 return buf; | |
| 1512 } | |
| 1513 | |
| 1514 void TypeLong::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 1515 char buf[80], buf2[80]; | |
| 1516 if (_lo == min_jlong && _hi == max_jlong) | |
| 1517 st->print("long"); | |
| 1518 else if (is_con()) | |
| 1519 st->print("long:%s", longname(buf, get_con())); | |
| 1520 else if (_hi == max_jlong) | |
| 1521 st->print("long:>=%s", longname(buf, _lo)); | |
| 1522 else if (_lo == min_jlong) | |
| 1523 st->print("long:<=%s", longname(buf, _hi)); | |
| 1524 else | |
| 1525 st->print("long:%s..%s", longname(buf, _lo), longname(buf2, _hi)); | |
| 1526 | |
| 1527 if (_widen != 0 && this != TypeLong::LONG) | |
| 1528 st->print(":%.*s", _widen, "wwww"); | |
| 1529 } | |
| 1530 #endif | |
| 1531 | |
| 1532 //------------------------------singleton-------------------------------------- | |
| 1533 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
| 1534 // constants | |
| 1535 bool TypeLong::singleton(void) const { | |
| 1536 return _lo >= _hi; | |
| 1537 } | |
| 1538 | |
| 1539 bool TypeLong::empty(void) const { | |
| 1540 return _lo > _hi; | |
| 1541 } | |
| 1542 | |
| 1543 //============================================================================= | |
| 1544 // Convenience common pre-built types. | |
| 1545 const TypeTuple *TypeTuple::IFBOTH; // Return both arms of IF as reachable | |
| 1546 const TypeTuple *TypeTuple::IFFALSE; | |
| 1547 const TypeTuple *TypeTuple::IFTRUE; | |
| 1548 const TypeTuple *TypeTuple::IFNEITHER; | |
| 1549 const TypeTuple *TypeTuple::LOOPBODY; | |
| 1550 const TypeTuple *TypeTuple::MEMBAR; | |
| 1551 const TypeTuple *TypeTuple::STORECONDITIONAL; | |
| 1552 const TypeTuple *TypeTuple::START_I2C; | |
| 1553 const TypeTuple *TypeTuple::INT_PAIR; | |
| 1554 const TypeTuple *TypeTuple::LONG_PAIR; | |
| 1555 | |
| 1556 | |
| 1557 //------------------------------make------------------------------------------- | |
| 1558 // Make a TypeTuple from the range of a method signature | |
| 1559 const TypeTuple *TypeTuple::make_range(ciSignature* sig) { | |
| 1560 ciType* return_type = sig->return_type(); | |
| 1561 uint total_fields = TypeFunc::Parms + return_type->size(); | |
| 1562 const Type **field_array = fields(total_fields); | |
| 1563 switch (return_type->basic_type()) { | |
| 1564 case T_LONG: | |
| 1565 field_array[TypeFunc::Parms] = TypeLong::LONG; | |
| 1566 field_array[TypeFunc::Parms+1] = Type::HALF; | |
| 1567 break; | |
| 1568 case T_DOUBLE: | |
| 1569 field_array[TypeFunc::Parms] = Type::DOUBLE; | |
| 1570 field_array[TypeFunc::Parms+1] = Type::HALF; | |
| 1571 break; | |
| 1572 case T_OBJECT: | |
| 1573 case T_ARRAY: | |
| 1574 case T_BOOLEAN: | |
| 1575 case T_CHAR: | |
| 1576 case T_FLOAT: | |
| 1577 case T_BYTE: | |
| 1578 case T_SHORT: | |
| 1579 case T_INT: | |
| 1580 field_array[TypeFunc::Parms] = get_const_type(return_type); | |
| 1581 break; | |
| 1582 case T_VOID: | |
| 1583 break; | |
| 1584 default: | |
| 1585 ShouldNotReachHere(); | |
| 1586 } | |
| 1587 return (TypeTuple*)(new TypeTuple(total_fields,field_array))->hashcons(); | |
| 1588 } | |
| 1589 | |
| 1590 // Make a TypeTuple from the domain of a method signature | |
| 1591 const TypeTuple *TypeTuple::make_domain(ciInstanceKlass* recv, ciSignature* sig) { | |
| 1592 uint total_fields = TypeFunc::Parms + sig->size(); | |
| 1593 | |
| 1594 uint pos = TypeFunc::Parms; | |
| 1595 const Type **field_array; | |
| 1596 if (recv != NULL) { | |
| 1597 total_fields++; | |
| 1598 field_array = fields(total_fields); | |
| 1599 // Use get_const_type here because it respects UseUniqueSubclasses: | |
| 1600 field_array[pos++] = get_const_type(recv)->join(TypePtr::NOTNULL); | |
| 1601 } else { | |
| 1602 field_array = fields(total_fields); | |
| 1603 } | |
| 1604 | |
| 1605 int i = 0; | |
| 1606 while (pos < total_fields) { | |
| 1607 ciType* type = sig->type_at(i); | |
| 1608 | |
| 1609 switch (type->basic_type()) { | |
| 1610 case T_LONG: | |
| 1611 field_array[pos++] = TypeLong::LONG; | |
| 1612 field_array[pos++] = Type::HALF; | |
| 1613 break; | |
| 1614 case T_DOUBLE: | |
| 1615 field_array[pos++] = Type::DOUBLE; | |
| 1616 field_array[pos++] = Type::HALF; | |
| 1617 break; | |
| 1618 case T_OBJECT: | |
| 1619 case T_ARRAY: | |
| 1620 case T_BOOLEAN: | |
| 1621 case T_CHAR: | |
| 1622 case T_FLOAT: | |
| 1623 case T_BYTE: | |
| 1624 case T_SHORT: | |
| 1625 case T_INT: | |
| 1626 field_array[pos++] = get_const_type(type); | |
| 1627 break; | |
| 1628 default: | |
| 1629 ShouldNotReachHere(); | |
| 1630 } | |
| 1631 i++; | |
| 1632 } | |
| 1633 return (TypeTuple*)(new TypeTuple(total_fields,field_array))->hashcons(); | |
| 1634 } | |
| 1635 | |
| 1636 const TypeTuple *TypeTuple::make( uint cnt, const Type **fields ) { | |
| 1637 return (TypeTuple*)(new TypeTuple(cnt,fields))->hashcons(); | |
| 1638 } | |
| 1639 | |
| 1640 //------------------------------fields----------------------------------------- | |
| 1641 // Subroutine call type with space allocated for argument types | |
| 1642 const Type **TypeTuple::fields( uint arg_cnt ) { | |
| 1643 const Type **flds = (const Type **)(Compile::current()->type_arena()->Amalloc_4((TypeFunc::Parms+arg_cnt)*sizeof(Type*) )); | |
| 1644 flds[TypeFunc::Control ] = Type::CONTROL; | |
| 1645 flds[TypeFunc::I_O ] = Type::ABIO; | |
| 1646 flds[TypeFunc::Memory ] = Type::MEMORY; | |
| 1647 flds[TypeFunc::FramePtr ] = TypeRawPtr::BOTTOM; | |
| 1648 flds[TypeFunc::ReturnAdr] = Type::RETURN_ADDRESS; | |
| 1649 | |
| 1650 return flds; | |
| 1651 } | |
| 1652 | |
| 1653 //------------------------------meet------------------------------------------- | |
| 1654 // Compute the MEET of two types. It returns a new Type object. | |
| 1655 const Type *TypeTuple::xmeet( const Type *t ) const { | |
| 1656 // Perform a fast test for common case; meeting the same types together. | |
| 1657 if( this == t ) return this; // Meeting same type-rep? | |
| 1658 | |
| 1659 // Current "this->_base" is Tuple | |
| 1660 switch (t->base()) { // switch on original type | |
| 1661 | |
| 1662 case Bottom: // Ye Olde Default | |
| 1663 return t; | |
| 1664 | |
| 1665 default: // All else is a mistake | |
| 1666 typerr(t); | |
| 1667 | |
| 1668 case Tuple: { // Meeting 2 signatures? | |
| 1669 const TypeTuple *x = t->is_tuple(); | |
| 1670 assert( _cnt == x->_cnt, "" ); | |
| 1671 const Type **fields = (const Type **)(Compile::current()->type_arena()->Amalloc_4( _cnt*sizeof(Type*) )); | |
| 1672 for( uint i=0; i<_cnt; i++ ) | |
| 1673 fields[i] = field_at(i)->xmeet( x->field_at(i) ); | |
| 1674 return TypeTuple::make(_cnt,fields); | |
| 1675 } | |
| 1676 case Top: | |
| 1677 break; | |
| 1678 } | |
| 1679 return this; // Return the double constant | |
| 1680 } | |
| 1681 | |
| 1682 //------------------------------xdual------------------------------------------ | |
| 1683 // Dual: compute field-by-field dual | |
| 1684 const Type *TypeTuple::xdual() const { | |
| 1685 const Type **fields = (const Type **)(Compile::current()->type_arena()->Amalloc_4( _cnt*sizeof(Type*) )); | |
| 1686 for( uint i=0; i<_cnt; i++ ) | |
| 1687 fields[i] = _fields[i]->dual(); | |
| 1688 return new TypeTuple(_cnt,fields); | |
| 1689 } | |
| 1690 | |
| 1691 //------------------------------eq--------------------------------------------- | |
| 1692 // Structural equality check for Type representations | |
| 1693 bool TypeTuple::eq( const Type *t ) const { | |
| 1694 const TypeTuple *s = (const TypeTuple *)t; | |
| 1695 if (_cnt != s->_cnt) return false; // Unequal field counts | |
| 1696 for (uint i = 0; i < _cnt; i++) | |
| 1697 if (field_at(i) != s->field_at(i)) // POINTER COMPARE! NO RECURSION! | |
| 1698 return false; // Missed | |
| 1699 return true; | |
| 1700 } | |
| 1701 | |
| 1702 //------------------------------hash------------------------------------------- | |
| 1703 // Type-specific hashing function. | |
| 1704 int TypeTuple::hash(void) const { | |
| 1705 intptr_t sum = _cnt; | |
| 1706 for( uint i=0; i<_cnt; i++ ) | |
| 1707 sum += (intptr_t)_fields[i]; // Hash on pointers directly | |
| 1708 return sum; | |
| 1709 } | |
| 1710 | |
| 1711 //------------------------------dump2------------------------------------------ | |
| 1712 // Dump signature Type | |
| 1713 #ifndef PRODUCT | |
| 1714 void TypeTuple::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 1715 st->print("{"); | |
| 1716 if( !depth || d[this] ) { // Check for recursive print | |
| 1717 st->print("...}"); | |
| 1718 return; | |
| 1719 } | |
| 1720 d.Insert((void*)this, (void*)this); // Stop recursion | |
| 1721 if( _cnt ) { | |
| 1722 uint i; | |
| 1723 for( i=0; i<_cnt-1; i++ ) { | |
| 1724 st->print("%d:", i); | |
| 1725 _fields[i]->dump2(d, depth-1, st); | |
| 1726 st->print(", "); | |
| 1727 } | |
| 1728 st->print("%d:", i); | |
| 1729 _fields[i]->dump2(d, depth-1, st); | |
| 1730 } | |
| 1731 st->print("}"); | |
| 1732 } | |
| 1733 #endif | |
| 1734 | |
| 1735 //------------------------------singleton-------------------------------------- | |
| 1736 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
| 1737 // constants (Ldi nodes). Singletons are integer, float or double constants | |
| 1738 // or a single symbol. | |
| 1739 bool TypeTuple::singleton(void) const { | |
| 1740 return false; // Never a singleton | |
| 1741 } | |
| 1742 | |
| 1743 bool TypeTuple::empty(void) const { | |
| 1744 for( uint i=0; i<_cnt; i++ ) { | |
| 1745 if (_fields[i]->empty()) return true; | |
| 1746 } | |
| 1747 return false; | |
| 1748 } | |
| 1749 | |
| 1750 //============================================================================= | |
| 1751 // Convenience common pre-built types. | |
| 1752 | |
| 1753 inline const TypeInt* normalize_array_size(const TypeInt* size) { | |
| 1754 // Certain normalizations keep us sane when comparing types. | |
| 1755 // We do not want arrayOop variables to differ only by the wideness | |
| 1756 // of their index types. Pick minimum wideness, since that is the | |
| 1757 // forced wideness of small ranges anyway. | |
| 1758 if (size->_widen != Type::WidenMin) | |
| 1759 return TypeInt::make(size->_lo, size->_hi, Type::WidenMin); | |
| 1760 else | |
| 1761 return size; | |
| 1762 } | |
| 1763 | |
| 1764 //------------------------------make------------------------------------------- | |
| 1765 const TypeAry *TypeAry::make( const Type *elem, const TypeInt *size) { | |
|
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1766 if (UseCompressedOops && elem->isa_oopptr()) { |
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1767 elem = elem->is_oopptr()->make_narrowoop(); |
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1768 } |
| 0 | 1769 size = normalize_array_size(size); |
| 1770 return (TypeAry*)(new TypeAry(elem,size))->hashcons(); | |
| 1771 } | |
| 1772 | |
| 1773 //------------------------------meet------------------------------------------- | |
| 1774 // Compute the MEET of two types. It returns a new Type object. | |
| 1775 const Type *TypeAry::xmeet( const Type *t ) const { | |
| 1776 // Perform a fast test for common case; meeting the same types together. | |
| 1777 if( this == t ) return this; // Meeting same type-rep? | |
| 1778 | |
| 1779 // Current "this->_base" is Ary | |
| 1780 switch (t->base()) { // switch on original type | |
| 1781 | |
| 1782 case Bottom: // Ye Olde Default | |
| 1783 return t; | |
| 1784 | |
| 1785 default: // All else is a mistake | |
| 1786 typerr(t); | |
| 1787 | |
| 1788 case Array: { // Meeting 2 arrays? | |
| 1789 const TypeAry *a = t->is_ary(); | |
| 1790 return TypeAry::make(_elem->meet(a->_elem), | |
| 1791 _size->xmeet(a->_size)->is_int()); | |
| 1792 } | |
| 1793 case Top: | |
| 1794 break; | |
| 1795 } | |
| 1796 return this; // Return the double constant | |
| 1797 } | |
| 1798 | |
| 1799 //------------------------------xdual------------------------------------------ | |
| 1800 // Dual: compute field-by-field dual | |
| 1801 const Type *TypeAry::xdual() const { | |
| 1802 const TypeInt* size_dual = _size->dual()->is_int(); | |
| 1803 size_dual = normalize_array_size(size_dual); | |
| 1804 return new TypeAry( _elem->dual(), size_dual); | |
| 1805 } | |
| 1806 | |
| 1807 //------------------------------eq--------------------------------------------- | |
| 1808 // Structural equality check for Type representations | |
| 1809 bool TypeAry::eq( const Type *t ) const { | |
| 1810 const TypeAry *a = (const TypeAry*)t; | |
| 1811 return _elem == a->_elem && | |
| 1812 _size == a->_size; | |
| 1813 } | |
| 1814 | |
| 1815 //------------------------------hash------------------------------------------- | |
| 1816 // Type-specific hashing function. | |
| 1817 int TypeAry::hash(void) const { | |
| 1818 return (intptr_t)_elem + (intptr_t)_size; | |
| 1819 } | |
| 1820 | |
| 1821 //------------------------------dump2------------------------------------------ | |
| 1822 #ifndef PRODUCT | |
| 1823 void TypeAry::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 1824 _elem->dump2(d, depth, st); | |
| 1825 st->print("["); | |
| 1826 _size->dump2(d, depth, st); | |
| 1827 st->print("]"); | |
| 1828 } | |
| 1829 #endif | |
| 1830 | |
| 1831 //------------------------------singleton-------------------------------------- | |
| 1832 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
| 1833 // constants (Ldi nodes). Singletons are integer, float or double constants | |
| 1834 // or a single symbol. | |
| 1835 bool TypeAry::singleton(void) const { | |
| 1836 return false; // Never a singleton | |
| 1837 } | |
| 1838 | |
| 1839 bool TypeAry::empty(void) const { | |
| 1840 return _elem->empty() || _size->empty(); | |
| 1841 } | |
| 1842 | |
| 1843 //--------------------------ary_must_be_exact---------------------------------- | |
| 1844 bool TypeAry::ary_must_be_exact() const { | |
| 1845 if (!UseExactTypes) return false; | |
| 1846 // This logic looks at the element type of an array, and returns true | |
| 1847 // if the element type is either a primitive or a final instance class. | |
| 1848 // In such cases, an array built on this ary must have no subclasses. | |
| 1849 if (_elem == BOTTOM) return false; // general array not exact | |
| 1850 if (_elem == TOP ) return false; // inverted general array not exact | |
|
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1851 const TypeOopPtr* toop = NULL; |
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1852 if (UseCompressedOops) { |
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1853 const TypeNarrowOop* noop = _elem->isa_narrowoop(); |
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1854 if (noop) toop = noop->make_oopptr()->isa_oopptr(); |
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1855 } else { |
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1856 toop = _elem->isa_oopptr(); |
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1857 } |
| 0 | 1858 if (!toop) return true; // a primitive type, like int |
| 1859 ciKlass* tklass = toop->klass(); | |
| 1860 if (tklass == NULL) return false; // unloaded class | |
| 1861 if (!tklass->is_loaded()) return false; // unloaded class | |
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1862 const TypeInstPtr* tinst; |
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1863 if (_elem->isa_narrowoop()) |
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1864 tinst = _elem->is_narrowoop()->make_oopptr()->isa_instptr(); |
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1865 else |
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1866 tinst = _elem->isa_instptr(); |
| 0 | 1867 if (tinst) return tklass->as_instance_klass()->is_final(); |
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1868 const TypeAryPtr* tap; |
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1869 if (_elem->isa_narrowoop()) |
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1870 tap = _elem->is_narrowoop()->make_oopptr()->isa_aryptr(); |
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1871 else |
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1872 tap = _elem->isa_aryptr(); |
| 0 | 1873 if (tap) return tap->ary()->ary_must_be_exact(); |
| 1874 return false; | |
| 1875 } | |
| 1876 | |
| 1877 //============================================================================= | |
| 1878 // Convenience common pre-built types. | |
| 1879 const TypePtr *TypePtr::NULL_PTR; | |
| 1880 const TypePtr *TypePtr::NOTNULL; | |
| 1881 const TypePtr *TypePtr::BOTTOM; | |
| 1882 | |
| 1883 //------------------------------meet------------------------------------------- | |
| 1884 // Meet over the PTR enum | |
| 1885 const TypePtr::PTR TypePtr::ptr_meet[TypePtr::lastPTR][TypePtr::lastPTR] = { | |
| 1886 // TopPTR, AnyNull, Constant, Null, NotNull, BotPTR, | |
| 1887 { /* Top */ TopPTR, AnyNull, Constant, Null, NotNull, BotPTR,}, | |
| 1888 { /* AnyNull */ AnyNull, AnyNull, Constant, BotPTR, NotNull, BotPTR,}, | |
| 1889 { /* Constant*/ Constant, Constant, Constant, BotPTR, NotNull, BotPTR,}, | |
| 1890 { /* Null */ Null, BotPTR, BotPTR, Null, BotPTR, BotPTR,}, | |
| 1891 { /* NotNull */ NotNull, NotNull, NotNull, BotPTR, NotNull, BotPTR,}, | |
| 1892 { /* BotPTR */ BotPTR, BotPTR, BotPTR, BotPTR, BotPTR, BotPTR,} | |
| 1893 }; | |
| 1894 | |
| 1895 //------------------------------make------------------------------------------- | |
| 1896 const TypePtr *TypePtr::make( TYPES t, enum PTR ptr, int offset ) { | |
| 1897 return (TypePtr*)(new TypePtr(t,ptr,offset))->hashcons(); | |
| 1898 } | |
| 1899 | |
| 1900 //------------------------------cast_to_ptr_type------------------------------- | |
| 1901 const Type *TypePtr::cast_to_ptr_type(PTR ptr) const { | |
| 1902 assert(_base == AnyPtr, "subclass must override cast_to_ptr_type"); | |
| 1903 if( ptr == _ptr ) return this; | |
| 1904 return make(_base, ptr, _offset); | |
| 1905 } | |
| 1906 | |
| 1907 //------------------------------get_con---------------------------------------- | |
| 1908 intptr_t TypePtr::get_con() const { | |
| 1909 assert( _ptr == Null, "" ); | |
| 1910 return _offset; | |
| 1911 } | |
| 1912 | |
| 1913 //------------------------------meet------------------------------------------- | |
| 1914 // Compute the MEET of two types. It returns a new Type object. | |
| 1915 const Type *TypePtr::xmeet( const Type *t ) const { | |
| 1916 // Perform a fast test for common case; meeting the same types together. | |
| 1917 if( this == t ) return this; // Meeting same type-rep? | |
| 1918 | |
| 1919 // Current "this->_base" is AnyPtr | |
| 1920 switch (t->base()) { // switch on original type | |
| 1921 case Int: // Mixing ints & oops happens when javac | |
| 1922 case Long: // reuses local variables | |
| 1923 case FloatTop: | |
| 1924 case FloatCon: | |
| 1925 case FloatBot: | |
| 1926 case DoubleTop: | |
| 1927 case DoubleCon: | |
| 1928 case DoubleBot: | |
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1929 case NarrowOop: |
| 0 | 1930 case Bottom: // Ye Olde Default |
| 1931 return Type::BOTTOM; | |
| 1932 case Top: | |
| 1933 return this; | |
| 1934 | |
| 1935 case AnyPtr: { // Meeting to AnyPtrs | |
| 1936 const TypePtr *tp = t->is_ptr(); | |
| 1937 return make( AnyPtr, meet_ptr(tp->ptr()), meet_offset(tp->offset()) ); | |
| 1938 } | |
| 1939 case RawPtr: // For these, flip the call around to cut down | |
| 1940 case OopPtr: | |
| 1941 case InstPtr: // on the cases I have to handle. | |
| 1942 case KlassPtr: | |
| 1943 case AryPtr: | |
| 1944 return t->xmeet(this); // Call in reverse direction | |
| 1945 default: // All else is a mistake | |
| 1946 typerr(t); | |
| 1947 | |
| 1948 } | |
| 1949 return this; | |
| 1950 } | |
| 1951 | |
| 1952 //------------------------------meet_offset------------------------------------ | |
| 1953 int TypePtr::meet_offset( int offset ) const { | |
| 1954 // Either is 'TOP' offset? Return the other offset! | |
| 1955 if( _offset == OffsetTop ) return offset; | |
| 1956 if( offset == OffsetTop ) return _offset; | |
| 1957 // If either is different, return 'BOTTOM' offset | |
| 1958 if( _offset != offset ) return OffsetBot; | |
| 1959 return _offset; | |
| 1960 } | |
| 1961 | |
| 1962 //------------------------------dual_offset------------------------------------ | |
| 1963 int TypePtr::dual_offset( ) const { | |
| 1964 if( _offset == OffsetTop ) return OffsetBot;// Map 'TOP' into 'BOTTOM' | |
| 1965 if( _offset == OffsetBot ) return OffsetTop;// Map 'BOTTOM' into 'TOP' | |
| 1966 return _offset; // Map everything else into self | |
| 1967 } | |
| 1968 | |
| 1969 //------------------------------xdual------------------------------------------ | |
| 1970 // Dual: compute field-by-field dual | |
| 1971 const TypePtr::PTR TypePtr::ptr_dual[TypePtr::lastPTR] = { | |
| 1972 BotPTR, NotNull, Constant, Null, AnyNull, TopPTR | |
| 1973 }; | |
| 1974 const Type *TypePtr::xdual() const { | |
| 1975 return new TypePtr( AnyPtr, dual_ptr(), dual_offset() ); | |
| 1976 } | |
| 1977 | |
| 1978 //------------------------------add_offset------------------------------------- | |
| 1979 const TypePtr *TypePtr::add_offset( int offset ) const { | |
| 1980 if( offset == 0 ) return this; // No change | |
| 1981 if( _offset == OffsetBot ) return this; | |
| 1982 if( offset == OffsetBot ) offset = OffsetBot; | |
| 1983 else if( _offset == OffsetTop || offset == OffsetTop ) offset = OffsetTop; | |
| 1984 else offset += _offset; | |
| 1985 return make( AnyPtr, _ptr, offset ); | |
| 1986 } | |
| 1987 | |
| 1988 //------------------------------eq--------------------------------------------- | |
| 1989 // Structural equality check for Type representations | |
| 1990 bool TypePtr::eq( const Type *t ) const { | |
| 1991 const TypePtr *a = (const TypePtr*)t; | |
| 1992 return _ptr == a->ptr() && _offset == a->offset(); | |
| 1993 } | |
| 1994 | |
| 1995 //------------------------------hash------------------------------------------- | |
| 1996 // Type-specific hashing function. | |
| 1997 int TypePtr::hash(void) const { | |
| 1998 return _ptr + _offset; | |
| 1999 } | |
| 2000 | |
| 2001 //------------------------------dump2------------------------------------------ | |
| 2002 const char *const TypePtr::ptr_msg[TypePtr::lastPTR] = { | |
| 2003 "TopPTR","AnyNull","Constant","NULL","NotNull","BotPTR" | |
| 2004 }; | |
| 2005 | |
| 2006 #ifndef PRODUCT | |
| 2007 void TypePtr::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 2008 if( _ptr == Null ) st->print("NULL"); | |
| 2009 else st->print("%s *", ptr_msg[_ptr]); | |
| 2010 if( _offset == OffsetTop ) st->print("+top"); | |
| 2011 else if( _offset == OffsetBot ) st->print("+bot"); | |
| 2012 else if( _offset ) st->print("+%d", _offset); | |
| 2013 } | |
| 2014 #endif | |
| 2015 | |
| 2016 //------------------------------singleton-------------------------------------- | |
| 2017 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
| 2018 // constants | |
| 2019 bool TypePtr::singleton(void) const { | |
| 2020 // TopPTR, Null, AnyNull, Constant are all singletons | |
| 2021 return (_offset != OffsetBot) && !below_centerline(_ptr); | |
| 2022 } | |
| 2023 | |
| 2024 bool TypePtr::empty(void) const { | |
| 2025 return (_offset == OffsetTop) || above_centerline(_ptr); | |
| 2026 } | |
| 2027 | |
| 2028 //============================================================================= | |
| 2029 // Convenience common pre-built types. | |
| 2030 const TypeRawPtr *TypeRawPtr::BOTTOM; | |
| 2031 const TypeRawPtr *TypeRawPtr::NOTNULL; | |
| 2032 | |
| 2033 //------------------------------make------------------------------------------- | |
| 2034 const TypeRawPtr *TypeRawPtr::make( enum PTR ptr ) { | |
| 2035 assert( ptr != Constant, "what is the constant?" ); | |
| 2036 assert( ptr != Null, "Use TypePtr for NULL" ); | |
| 2037 return (TypeRawPtr*)(new TypeRawPtr(ptr,0))->hashcons(); | |
| 2038 } | |
| 2039 | |
| 2040 const TypeRawPtr *TypeRawPtr::make( address bits ) { | |
| 2041 assert( bits, "Use TypePtr for NULL" ); | |
| 2042 return (TypeRawPtr*)(new TypeRawPtr(Constant,bits))->hashcons(); | |
| 2043 } | |
| 2044 | |
| 2045 //------------------------------cast_to_ptr_type------------------------------- | |
| 2046 const Type *TypeRawPtr::cast_to_ptr_type(PTR ptr) const { | |
| 2047 assert( ptr != Constant, "what is the constant?" ); | |
| 2048 assert( ptr != Null, "Use TypePtr for NULL" ); | |
| 2049 assert( _bits==0, "Why cast a constant address?"); | |
| 2050 if( ptr == _ptr ) return this; | |
| 2051 return make(ptr); | |
| 2052 } | |
| 2053 | |
| 2054 //------------------------------get_con---------------------------------------- | |
| 2055 intptr_t TypeRawPtr::get_con() const { | |
| 2056 assert( _ptr == Null || _ptr == Constant, "" ); | |
| 2057 return (intptr_t)_bits; | |
| 2058 } | |
| 2059 | |
| 2060 //------------------------------meet------------------------------------------- | |
| 2061 // Compute the MEET of two types. It returns a new Type object. | |
| 2062 const Type *TypeRawPtr::xmeet( const Type *t ) const { | |
| 2063 // Perform a fast test for common case; meeting the same types together. | |
| 2064 if( this == t ) return this; // Meeting same type-rep? | |
| 2065 | |
| 2066 // Current "this->_base" is RawPtr | |
| 2067 switch( t->base() ) { // switch on original type | |
| 2068 case Bottom: // Ye Olde Default | |
| 2069 return t; | |
| 2070 case Top: | |
| 2071 return this; | |
| 2072 case AnyPtr: // Meeting to AnyPtrs | |
| 2073 break; | |
| 2074 case RawPtr: { // might be top, bot, any/not or constant | |
| 2075 enum PTR tptr = t->is_ptr()->ptr(); | |
| 2076 enum PTR ptr = meet_ptr( tptr ); | |
| 2077 if( ptr == Constant ) { // Cannot be equal constants, so... | |
| 2078 if( tptr == Constant && _ptr != Constant) return t; | |
| 2079 if( _ptr == Constant && tptr != Constant) return this; | |
| 2080 ptr = NotNull; // Fall down in lattice | |
| 2081 } | |
| 2082 return make( ptr ); | |
| 2083 } | |
| 2084 | |
| 2085 case OopPtr: | |
| 2086 case InstPtr: | |
| 2087 case KlassPtr: | |
| 2088 case AryPtr: | |
| 2089 return TypePtr::BOTTOM; // Oop meet raw is not well defined | |
| 2090 default: // All else is a mistake | |
| 2091 typerr(t); | |
| 2092 } | |
| 2093 | |
| 2094 // Found an AnyPtr type vs self-RawPtr type | |
| 2095 const TypePtr *tp = t->is_ptr(); | |
| 2096 switch (tp->ptr()) { | |
| 2097 case TypePtr::TopPTR: return this; | |
| 2098 case TypePtr::BotPTR: return t; | |
| 2099 case TypePtr::Null: | |
| 2100 if( _ptr == TypePtr::TopPTR ) return t; | |
| 2101 return TypeRawPtr::BOTTOM; | |
| 2102 case TypePtr::NotNull: return TypePtr::make( AnyPtr, meet_ptr(TypePtr::NotNull), tp->meet_offset(0) ); | |
| 2103 case TypePtr::AnyNull: | |
| 2104 if( _ptr == TypePtr::Constant) return this; | |
| 2105 return make( meet_ptr(TypePtr::AnyNull) ); | |
| 2106 default: ShouldNotReachHere(); | |
| 2107 } | |
| 2108 return this; | |
| 2109 } | |
| 2110 | |
| 2111 //------------------------------xdual------------------------------------------ | |
| 2112 // Dual: compute field-by-field dual | |
| 2113 const Type *TypeRawPtr::xdual() const { | |
| 2114 return new TypeRawPtr( dual_ptr(), _bits ); | |
| 2115 } | |
| 2116 | |
| 2117 //------------------------------add_offset------------------------------------- | |
| 2118 const TypePtr *TypeRawPtr::add_offset( int offset ) const { | |
| 2119 if( offset == OffsetTop ) return BOTTOM; // Undefined offset-> undefined pointer | |
| 2120 if( offset == OffsetBot ) return BOTTOM; // Unknown offset-> unknown pointer | |
| 2121 if( offset == 0 ) return this; // No change | |
| 2122 switch (_ptr) { | |
| 2123 case TypePtr::TopPTR: | |
| 2124 case TypePtr::BotPTR: | |
| 2125 case TypePtr::NotNull: | |
| 2126 return this; | |
| 2127 case TypePtr::Null: | |
| 2128 case TypePtr::Constant: | |
| 2129 return make( _bits+offset ); | |
| 2130 default: ShouldNotReachHere(); | |
| 2131 } | |
| 2132 return NULL; // Lint noise | |
| 2133 } | |
| 2134 | |
| 2135 //------------------------------eq--------------------------------------------- | |
| 2136 // Structural equality check for Type representations | |
| 2137 bool TypeRawPtr::eq( const Type *t ) const { | |
| 2138 const TypeRawPtr *a = (const TypeRawPtr*)t; | |
| 2139 return _bits == a->_bits && TypePtr::eq(t); | |
| 2140 } | |
| 2141 | |
| 2142 //------------------------------hash------------------------------------------- | |
| 2143 // Type-specific hashing function. | |
| 2144 int TypeRawPtr::hash(void) const { | |
| 2145 return (intptr_t)_bits + TypePtr::hash(); | |
| 2146 } | |
| 2147 | |
| 2148 //------------------------------dump2------------------------------------------ | |
| 2149 #ifndef PRODUCT | |
| 2150 void TypeRawPtr::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 2151 if( _ptr == Constant ) | |
| 2152 st->print(INTPTR_FORMAT, _bits); | |
| 2153 else | |
| 2154 st->print("rawptr:%s", ptr_msg[_ptr]); | |
| 2155 } | |
| 2156 #endif | |
| 2157 | |
| 2158 //============================================================================= | |
| 2159 // Convenience common pre-built type. | |
| 2160 const TypeOopPtr *TypeOopPtr::BOTTOM; | |
| 2161 | |
| 163 | 2162 //------------------------------TypeOopPtr------------------------------------- |
| 2163 TypeOopPtr::TypeOopPtr( TYPES t, PTR ptr, ciKlass* k, bool xk, ciObject* o, int offset, int instance_id ) | |
| 2164 : TypePtr(t, ptr, offset), | |
| 2165 _const_oop(o), _klass(k), | |
| 2166 _klass_is_exact(xk), | |
| 2167 _is_ptr_to_narrowoop(false), | |
| 2168 _instance_id(instance_id) { | |
| 2169 #ifdef _LP64 | |
| 2170 if (UseCompressedOops && _offset != 0) { | |
| 2171 if (klass() == NULL) { | |
| 2172 assert(this->isa_aryptr(), "only arrays without klass"); | |
| 2173 _is_ptr_to_narrowoop = true; | |
| 2174 } else if (_offset == oopDesc::klass_offset_in_bytes()) { | |
| 2175 _is_ptr_to_narrowoop = true; | |
| 2176 } else if (this->isa_aryptr()) { | |
| 2177 _is_ptr_to_narrowoop = (klass()->is_obj_array_klass() && | |
| 2178 _offset != arrayOopDesc::length_offset_in_bytes()); | |
| 2179 } else if (klass() == ciEnv::current()->Class_klass() && | |
| 2180 (_offset == java_lang_Class::klass_offset_in_bytes() || | |
| 2181 _offset == java_lang_Class::array_klass_offset_in_bytes())) { | |
| 2182 // Special hidden fields from the Class. | |
| 2183 assert(this->isa_instptr(), "must be an instance ptr."); | |
| 2184 _is_ptr_to_narrowoop = true; | |
| 2185 } else if (klass()->is_instance_klass()) { | |
| 2186 ciInstanceKlass* ik = klass()->as_instance_klass(); | |
| 2187 ciField* field = NULL; | |
| 2188 if (this->isa_klassptr()) { | |
| 2189 // Perm objects don't use compressed references, except for | |
| 2190 // static fields which are currently compressed. | |
| 2191 field = ik->get_field_by_offset(_offset, true); | |
| 2192 if (field != NULL) { | |
| 2193 BasicType basic_elem_type = field->layout_type(); | |
| 2194 _is_ptr_to_narrowoop = (basic_elem_type == T_OBJECT || | |
| 2195 basic_elem_type == T_ARRAY); | |
| 2196 } | |
| 2197 } else if (_offset == OffsetBot || _offset == OffsetTop) { | |
| 2198 // unsafe access | |
| 2199 _is_ptr_to_narrowoop = true; | |
| 2200 } else { // exclude unsafe ops | |
| 2201 assert(this->isa_instptr(), "must be an instance ptr."); | |
| 2202 // Field which contains a compressed oop references. | |
| 2203 field = ik->get_field_by_offset(_offset, false); | |
| 2204 if (field != NULL) { | |
| 2205 BasicType basic_elem_type = field->layout_type(); | |
| 2206 _is_ptr_to_narrowoop = (basic_elem_type == T_OBJECT || | |
| 2207 basic_elem_type == T_ARRAY); | |
| 2208 } else if (klass()->equals(ciEnv::current()->Object_klass())) { | |
| 2209 // Compile::find_alias_type() cast exactness on all types to verify | |
| 2210 // that it does not affect alias type. | |
| 2211 _is_ptr_to_narrowoop = true; | |
| 2212 } else { | |
| 2213 // Type for the copy start in LibraryCallKit::inline_native_clone(). | |
| 2214 assert(!klass_is_exact(), "only non-exact klass"); | |
| 2215 _is_ptr_to_narrowoop = true; | |
| 2216 } | |
| 2217 } | |
| 2218 } | |
| 2219 } | |
| 2220 #endif | |
| 2221 } | |
| 2222 | |
| 0 | 2223 //------------------------------make------------------------------------------- |
| 2224 const TypeOopPtr *TypeOopPtr::make(PTR ptr, | |
| 2225 int offset) { | |
| 2226 assert(ptr != Constant, "no constant generic pointers"); | |
| 2227 ciKlass* k = ciKlassKlass::make(); | |
| 2228 bool xk = false; | |
| 2229 ciObject* o = NULL; | |
| 2230 return (TypeOopPtr*)(new TypeOopPtr(OopPtr, ptr, k, xk, o, offset, UNKNOWN_INSTANCE))->hashcons(); | |
| 2231 } | |
| 2232 | |
| 2233 | |
| 2234 //------------------------------cast_to_ptr_type------------------------------- | |
| 2235 const Type *TypeOopPtr::cast_to_ptr_type(PTR ptr) const { | |
| 2236 assert(_base == OopPtr, "subclass must override cast_to_ptr_type"); | |
| 2237 if( ptr == _ptr ) return this; | |
| 2238 return make(ptr, _offset); | |
| 2239 } | |
| 2240 | |
| 2241 //-----------------------------cast_to_instance------------------------------- | |
| 2242 const TypeOopPtr *TypeOopPtr::cast_to_instance(int instance_id) const { | |
| 2243 // There are no instances of a general oop. | |
| 2244 // Return self unchanged. | |
| 2245 return this; | |
| 2246 } | |
| 2247 | |
| 2248 //-----------------------------cast_to_exactness------------------------------- | |
| 2249 const Type *TypeOopPtr::cast_to_exactness(bool klass_is_exact) const { | |
| 2250 // There is no such thing as an exact general oop. | |
| 2251 // Return self unchanged. | |
| 2252 return this; | |
| 2253 } | |
| 2254 | |
| 2255 | |
| 2256 //------------------------------as_klass_type---------------------------------- | |
| 2257 // Return the klass type corresponding to this instance or array type. | |
| 2258 // It is the type that is loaded from an object of this type. | |
| 2259 const TypeKlassPtr* TypeOopPtr::as_klass_type() const { | |
| 2260 ciKlass* k = klass(); | |
| 2261 bool xk = klass_is_exact(); | |
| 2262 if (k == NULL || !k->is_java_klass()) | |
| 2263 return TypeKlassPtr::OBJECT; | |
| 2264 else | |
| 2265 return TypeKlassPtr::make(xk? Constant: NotNull, k, 0); | |
| 2266 } | |
| 2267 | |
| 2268 | |
| 2269 //------------------------------meet------------------------------------------- | |
| 2270 // Compute the MEET of two types. It returns a new Type object. | |
| 2271 const Type *TypeOopPtr::xmeet( const Type *t ) const { | |
| 2272 // Perform a fast test for common case; meeting the same types together. | |
| 2273 if( this == t ) return this; // Meeting same type-rep? | |
| 2274 | |
| 2275 // Current "this->_base" is OopPtr | |
| 2276 switch (t->base()) { // switch on original type | |
| 2277 | |
| 2278 case Int: // Mixing ints & oops happens when javac | |
| 2279 case Long: // reuses local variables | |
| 2280 case FloatTop: | |
| 2281 case FloatCon: | |
| 2282 case FloatBot: | |
| 2283 case DoubleTop: | |
| 2284 case DoubleCon: | |
| 2285 case DoubleBot: | |
| 2286 case Bottom: // Ye Olde Default | |
| 2287 return Type::BOTTOM; | |
| 2288 case Top: | |
| 2289 return this; | |
| 2290 | |
| 2291 default: // All else is a mistake | |
| 2292 typerr(t); | |
| 2293 | |
| 2294 case RawPtr: | |
| 2295 return TypePtr::BOTTOM; // Oop meet raw is not well defined | |
| 2296 | |
| 2297 case AnyPtr: { | |
| 2298 // Found an AnyPtr type vs self-OopPtr type | |
| 2299 const TypePtr *tp = t->is_ptr(); | |
| 2300 int offset = meet_offset(tp->offset()); | |
| 2301 PTR ptr = meet_ptr(tp->ptr()); | |
| 2302 switch (tp->ptr()) { | |
| 2303 case Null: | |
| 2304 if (ptr == Null) return TypePtr::make(AnyPtr, ptr, offset); | |
| 2305 // else fall through: | |
| 2306 case TopPTR: | |
| 2307 case AnyNull: | |
| 2308 return make(ptr, offset); | |
| 2309 case BotPTR: | |
| 2310 case NotNull: | |
| 2311 return TypePtr::make(AnyPtr, ptr, offset); | |
| 2312 default: typerr(t); | |
| 2313 } | |
| 2314 } | |
| 2315 | |
| 2316 case OopPtr: { // Meeting to other OopPtrs | |
| 2317 const TypeOopPtr *tp = t->is_oopptr(); | |
| 2318 return make( meet_ptr(tp->ptr()), meet_offset(tp->offset()) ); | |
| 2319 } | |
| 2320 | |
| 2321 case InstPtr: // For these, flip the call around to cut down | |
| 2322 case KlassPtr: // on the cases I have to handle. | |
| 2323 case AryPtr: | |
| 2324 return t->xmeet(this); // Call in reverse direction | |
| 2325 | |
| 2326 } // End of switch | |
| 2327 return this; // Return the double constant | |
| 2328 } | |
| 2329 | |
| 2330 | |
| 2331 //------------------------------xdual------------------------------------------ | |
| 2332 // Dual of a pure heap pointer. No relevant klass or oop information. | |
| 2333 const Type *TypeOopPtr::xdual() const { | |
| 2334 assert(klass() == ciKlassKlass::make(), "no klasses here"); | |
| 2335 assert(const_oop() == NULL, "no constants here"); | |
| 2336 return new TypeOopPtr(_base, dual_ptr(), klass(), klass_is_exact(), const_oop(), dual_offset(), dual_instance() ); | |
| 2337 } | |
| 2338 | |
| 2339 //--------------------------make_from_klass_common----------------------------- | |
| 2340 // Computes the element-type given a klass. | |
| 2341 const TypeOopPtr* TypeOopPtr::make_from_klass_common(ciKlass *klass, bool klass_change, bool try_for_exact) { | |
| 2342 assert(klass->is_java_klass(), "must be java language klass"); | |
| 2343 if (klass->is_instance_klass()) { | |
| 2344 Compile* C = Compile::current(); | |
| 2345 Dependencies* deps = C->dependencies(); | |
| 2346 assert((deps != NULL) == (C->method() != NULL && C->method()->code_size() > 0), "sanity"); | |
| 2347 // Element is an instance | |
| 2348 bool klass_is_exact = false; | |
| 2349 if (klass->is_loaded()) { | |
| 2350 // Try to set klass_is_exact. | |
| 2351 ciInstanceKlass* ik = klass->as_instance_klass(); | |
| 2352 klass_is_exact = ik->is_final(); | |
| 2353 if (!klass_is_exact && klass_change | |
| 2354 && deps != NULL && UseUniqueSubclasses) { | |
| 2355 ciInstanceKlass* sub = ik->unique_concrete_subklass(); | |
| 2356 if (sub != NULL) { | |
| 2357 deps->assert_abstract_with_unique_concrete_subtype(ik, sub); | |
| 2358 klass = ik = sub; | |
| 2359 klass_is_exact = sub->is_final(); | |
| 2360 } | |
| 2361 } | |
| 2362 if (!klass_is_exact && try_for_exact | |
| 2363 && deps != NULL && UseExactTypes) { | |
| 2364 if (!ik->is_interface() && !ik->has_subklass()) { | |
| 2365 // Add a dependence; if concrete subclass added we need to recompile | |
| 2366 deps->assert_leaf_type(ik); | |
| 2367 klass_is_exact = true; | |
| 2368 } | |
| 2369 } | |
| 2370 } | |
| 2371 return TypeInstPtr::make(TypePtr::BotPTR, klass, klass_is_exact, NULL, 0); | |
| 2372 } else if (klass->is_obj_array_klass()) { | |
| 2373 // Element is an object array. Recursively call ourself. | |
| 2374 const TypeOopPtr *etype = TypeOopPtr::make_from_klass_common(klass->as_obj_array_klass()->element_klass(), false, try_for_exact); | |
| 2375 bool xk = etype->klass_is_exact(); | |
| 2376 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::POS); | |
| 2377 // We used to pass NotNull in here, asserting that the sub-arrays | |
| 2378 // are all not-null. This is not true in generally, as code can | |
| 2379 // slam NULLs down in the subarrays. | |
| 2380 const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::BotPTR, arr0, klass, xk, 0); | |
| 2381 return arr; | |
| 2382 } else if (klass->is_type_array_klass()) { | |
| 2383 // Element is an typeArray | |
| 2384 const Type* etype = get_const_basic_type(klass->as_type_array_klass()->element_type()); | |
| 2385 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::POS); | |
| 2386 // We used to pass NotNull in here, asserting that the array pointer | |
| 2387 // is not-null. That was not true in general. | |
| 2388 const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::BotPTR, arr0, klass, true, 0); | |
| 2389 return arr; | |
| 2390 } else { | |
| 2391 ShouldNotReachHere(); | |
| 2392 return NULL; | |
| 2393 } | |
| 2394 } | |
| 2395 | |
| 2396 //------------------------------make_from_constant----------------------------- | |
| 2397 // Make a java pointer from an oop constant | |
| 2398 const TypeOopPtr* TypeOopPtr::make_from_constant(ciObject* o) { | |
| 2399 if (o->is_method_data() || o->is_method()) { | |
| 2400 // Treat much like a typeArray of bytes, like below, but fake the type... | |
| 2401 assert(o->has_encoding(), "must be a perm space object"); | |
| 2402 const Type* etype = (Type*)get_const_basic_type(T_BYTE); | |
| 2403 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::POS); | |
| 2404 ciKlass *klass = ciTypeArrayKlass::make((BasicType) T_BYTE); | |
| 2405 assert(o->has_encoding(), "method data oops should be tenured"); | |
| 2406 const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::Constant, o, arr0, klass, true, 0); | |
| 2407 return arr; | |
| 2408 } else { | |
| 2409 assert(o->is_java_object(), "must be java language object"); | |
| 2410 assert(!o->is_null_object(), "null object not yet handled here."); | |
| 2411 ciKlass *klass = o->klass(); | |
| 2412 if (klass->is_instance_klass()) { | |
| 2413 // Element is an instance | |
| 2414 if (!o->has_encoding()) { // not a perm-space constant | |
| 2415 // %%% remove this restriction by rewriting non-perm ConPNodes in a later phase | |
| 2416 return TypeInstPtr::make(TypePtr::NotNull, klass, true, NULL, 0); | |
| 2417 } | |
| 2418 return TypeInstPtr::make(o); | |
| 2419 } else if (klass->is_obj_array_klass()) { | |
| 2420 // Element is an object array. Recursively call ourself. | |
| 2421 const Type *etype = | |
| 2422 TypeOopPtr::make_from_klass_raw(klass->as_obj_array_klass()->element_klass()); | |
| 2423 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::make(o->as_array()->length())); | |
| 2424 // We used to pass NotNull in here, asserting that the sub-arrays | |
| 2425 // are all not-null. This is not true in generally, as code can | |
| 2426 // slam NULLs down in the subarrays. | |
| 2427 if (!o->has_encoding()) { // not a perm-space constant | |
| 2428 // %%% remove this restriction by rewriting non-perm ConPNodes in a later phase | |
| 2429 return TypeAryPtr::make(TypePtr::NotNull, arr0, klass, true, 0); | |
| 2430 } | |
| 2431 const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::Constant, o, arr0, klass, true, 0); | |
| 2432 return arr; | |
| 2433 } else if (klass->is_type_array_klass()) { | |
| 2434 // Element is an typeArray | |
| 2435 const Type* etype = | |
| 2436 (Type*)get_const_basic_type(klass->as_type_array_klass()->element_type()); | |
| 2437 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::make(o->as_array()->length())); | |
| 2438 // We used to pass NotNull in here, asserting that the array pointer | |
| 2439 // is not-null. That was not true in general. | |
| 2440 if (!o->has_encoding()) { // not a perm-space constant | |
| 2441 // %%% remove this restriction by rewriting non-perm ConPNodes in a later phase | |
| 2442 return TypeAryPtr::make(TypePtr::NotNull, arr0, klass, true, 0); | |
| 2443 } | |
| 2444 const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::Constant, o, arr0, klass, true, 0); | |
| 2445 return arr; | |
| 2446 } | |
| 2447 } | |
| 2448 | |
| 2449 ShouldNotReachHere(); | |
| 2450 return NULL; | |
| 2451 } | |
| 2452 | |
| 2453 //------------------------------get_con---------------------------------------- | |
| 2454 intptr_t TypeOopPtr::get_con() const { | |
| 2455 assert( _ptr == Null || _ptr == Constant, "" ); | |
| 2456 assert( _offset >= 0, "" ); | |
| 2457 | |
| 2458 if (_offset != 0) { | |
| 2459 // After being ported to the compiler interface, the compiler no longer | |
| 2460 // directly manipulates the addresses of oops. Rather, it only has a pointer | |
| 2461 // to a handle at compile time. This handle is embedded in the generated | |
| 2462 // code and dereferenced at the time the nmethod is made. Until that time, | |
| 2463 // it is not reasonable to do arithmetic with the addresses of oops (we don't | |
| 2464 // have access to the addresses!). This does not seem to currently happen, | |
| 2465 // but this assertion here is to help prevent its occurrance. | |
| 2466 tty->print_cr("Found oop constant with non-zero offset"); | |
| 2467 ShouldNotReachHere(); | |
| 2468 } | |
| 2469 | |
| 2470 return (intptr_t)const_oop()->encoding(); | |
| 2471 } | |
| 2472 | |
| 2473 | |
| 2474 //-----------------------------filter------------------------------------------ | |
| 2475 // Do not allow interface-vs.-noninterface joins to collapse to top. | |
| 2476 const Type *TypeOopPtr::filter( const Type *kills ) const { | |
| 2477 | |
| 2478 const Type* ft = join(kills); | |
| 2479 const TypeInstPtr* ftip = ft->isa_instptr(); | |
| 2480 const TypeInstPtr* ktip = kills->isa_instptr(); | |
| 2481 | |
| 2482 if (ft->empty()) { | |
| 2483 // Check for evil case of 'this' being a class and 'kills' expecting an | |
| 2484 // interface. This can happen because the bytecodes do not contain | |
| 2485 // enough type info to distinguish a Java-level interface variable | |
| 2486 // from a Java-level object variable. If we meet 2 classes which | |
| 2487 // both implement interface I, but their meet is at 'j/l/O' which | |
| 2488 // doesn't implement I, we have no way to tell if the result should | |
| 2489 // be 'I' or 'j/l/O'. Thus we'll pick 'j/l/O'. If this then flows | |
| 2490 // into a Phi which "knows" it's an Interface type we'll have to | |
| 2491 // uplift the type. | |
| 2492 if (!empty() && ktip != NULL && ktip->is_loaded() && ktip->klass()->is_interface()) | |
| 2493 return kills; // Uplift to interface | |
| 2494 | |
| 2495 return Type::TOP; // Canonical empty value | |
| 2496 } | |
| 2497 | |
| 2498 // If we have an interface-typed Phi or cast and we narrow to a class type, | |
| 2499 // the join should report back the class. However, if we have a J/L/Object | |
| 2500 // class-typed Phi and an interface flows in, it's possible that the meet & | |
| 2501 // join report an interface back out. This isn't possible but happens | |
| 2502 // because the type system doesn't interact well with interfaces. | |
| 2503 if (ftip != NULL && ktip != NULL && | |
| 2504 ftip->is_loaded() && ftip->klass()->is_interface() && | |
| 2505 ktip->is_loaded() && !ktip->klass()->is_interface()) { | |
| 2506 // Happens in a CTW of rt.jar, 320-341, no extra flags | |
| 2507 return ktip->cast_to_ptr_type(ftip->ptr()); | |
| 2508 } | |
| 2509 | |
| 2510 return ft; | |
| 2511 } | |
| 2512 | |
| 2513 //------------------------------eq--------------------------------------------- | |
| 2514 // Structural equality check for Type representations | |
| 2515 bool TypeOopPtr::eq( const Type *t ) const { | |
| 2516 const TypeOopPtr *a = (const TypeOopPtr*)t; | |
| 2517 if (_klass_is_exact != a->_klass_is_exact || | |
| 2518 _instance_id != a->_instance_id) return false; | |
| 2519 ciObject* one = const_oop(); | |
| 2520 ciObject* two = a->const_oop(); | |
| 2521 if (one == NULL || two == NULL) { | |
| 2522 return (one == two) && TypePtr::eq(t); | |
| 2523 } else { | |
| 2524 return one->equals(two) && TypePtr::eq(t); | |
| 2525 } | |
| 2526 } | |
| 2527 | |
| 2528 //------------------------------hash------------------------------------------- | |
| 2529 // Type-specific hashing function. | |
| 2530 int TypeOopPtr::hash(void) const { | |
| 2531 return | |
| 2532 (const_oop() ? const_oop()->hash() : 0) + | |
| 2533 _klass_is_exact + | |
| 2534 _instance_id + | |
| 2535 TypePtr::hash(); | |
| 2536 } | |
| 2537 | |
| 2538 //------------------------------dump2------------------------------------------ | |
| 2539 #ifndef PRODUCT | |
| 2540 void TypeOopPtr::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 2541 st->print("oopptr:%s", ptr_msg[_ptr]); | |
| 2542 if( _klass_is_exact ) st->print(":exact"); | |
| 2543 if( const_oop() ) st->print(INTPTR_FORMAT, const_oop()); | |
| 2544 switch( _offset ) { | |
| 2545 case OffsetTop: st->print("+top"); break; | |
| 2546 case OffsetBot: st->print("+any"); break; | |
| 2547 case 0: break; | |
| 2548 default: st->print("+%d",_offset); break; | |
| 2549 } | |
| 2550 if (_instance_id != UNKNOWN_INSTANCE) | |
| 2551 st->print(",iid=%d",_instance_id); | |
| 2552 } | |
| 2553 #endif | |
| 2554 | |
| 2555 //------------------------------singleton-------------------------------------- | |
| 2556 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
| 2557 // constants | |
| 2558 bool TypeOopPtr::singleton(void) const { | |
| 2559 // detune optimizer to not generate constant oop + constant offset as a constant! | |
| 2560 // TopPTR, Null, AnyNull, Constant are all singletons | |
| 2561 return (_offset == 0) && !below_centerline(_ptr); | |
| 2562 } | |
| 2563 | |
| 2564 //------------------------------xadd_offset------------------------------------ | |
| 2565 int TypeOopPtr::xadd_offset( int offset ) const { | |
| 2566 // Adding to 'TOP' offset? Return 'TOP'! | |
| 2567 if( _offset == OffsetTop || offset == OffsetTop ) return OffsetTop; | |
| 2568 // Adding to 'BOTTOM' offset? Return 'BOTTOM'! | |
| 2569 if( _offset == OffsetBot || offset == OffsetBot ) return OffsetBot; | |
| 2570 | |
| 2571 // assert( _offset >= 0 && _offset+offset >= 0, "" ); | |
| 2572 // It is possible to construct a negative offset during PhaseCCP | |
| 2573 | |
| 2574 return _offset+offset; // Sum valid offsets | |
| 2575 } | |
| 2576 | |
| 2577 //------------------------------add_offset------------------------------------- | |
| 2578 const TypePtr *TypeOopPtr::add_offset( int offset ) const { | |
| 2579 return make( _ptr, xadd_offset(offset) ); | |
| 2580 } | |
| 2581 | |
|
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2582 const TypeNarrowOop* TypeOopPtr::make_narrowoop() const { |
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2583 return TypeNarrowOop::make(this); |
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2584 } |
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2585 |
| 0 | 2586 int TypeOopPtr::meet_instance(int iid) const { |
| 2587 if (iid == 0) { | |
| 2588 return (_instance_id < 0) ? _instance_id : UNKNOWN_INSTANCE; | |
| 2589 } else if (_instance_id == UNKNOWN_INSTANCE) { | |
| 2590 return (iid < 0) ? iid : UNKNOWN_INSTANCE; | |
| 2591 } else { | |
| 2592 return (_instance_id == iid) ? iid : UNKNOWN_INSTANCE; | |
| 2593 } | |
| 2594 } | |
| 2595 | |
| 2596 //============================================================================= | |
| 2597 // Convenience common pre-built types. | |
| 2598 const TypeInstPtr *TypeInstPtr::NOTNULL; | |
| 2599 const TypeInstPtr *TypeInstPtr::BOTTOM; | |
| 2600 const TypeInstPtr *TypeInstPtr::MIRROR; | |
| 2601 const TypeInstPtr *TypeInstPtr::MARK; | |
| 2602 const TypeInstPtr *TypeInstPtr::KLASS; | |
| 2603 | |
| 2604 //------------------------------TypeInstPtr------------------------------------- | |
| 2605 TypeInstPtr::TypeInstPtr(PTR ptr, ciKlass* k, bool xk, ciObject* o, int off, int instance_id) | |
| 2606 : TypeOopPtr(InstPtr, ptr, k, xk, o, off, instance_id), _name(k->name()) { | |
| 2607 assert(k != NULL && | |
| 2608 (k->is_loaded() || o == NULL), | |
| 2609 "cannot have constants with non-loaded klass"); | |
| 2610 }; | |
| 2611 | |
| 2612 //------------------------------make------------------------------------------- | |
| 2613 const TypeInstPtr *TypeInstPtr::make(PTR ptr, | |
| 2614 ciKlass* k, | |
| 2615 bool xk, | |
| 2616 ciObject* o, | |
| 2617 int offset, | |
| 2618 int instance_id) { | |
| 2619 assert( !k->is_loaded() || k->is_instance_klass() || | |
| 2620 k->is_method_klass(), "Must be for instance or method"); | |
| 2621 // Either const_oop() is NULL or else ptr is Constant | |
| 2622 assert( (!o && ptr != Constant) || (o && ptr == Constant), | |
| 2623 "constant pointers must have a value supplied" ); | |
| 2624 // Ptr is never Null | |
| 2625 assert( ptr != Null, "NULL pointers are not typed" ); | |
| 2626 | |
| 2627 if (instance_id != UNKNOWN_INSTANCE) | |
| 2628 xk = true; // instances are always exactly typed | |
| 2629 if (!UseExactTypes) xk = false; | |
| 2630 if (ptr == Constant) { | |
| 2631 // Note: This case includes meta-object constants, such as methods. | |
| 2632 xk = true; | |
| 2633 } else if (k->is_loaded()) { | |
| 2634 ciInstanceKlass* ik = k->as_instance_klass(); | |
| 2635 if (!xk && ik->is_final()) xk = true; // no inexact final klass | |
| 2636 if (xk && ik->is_interface()) xk = false; // no exact interface | |
| 2637 } | |
| 2638 | |
| 2639 // Now hash this baby | |
| 2640 TypeInstPtr *result = | |
| 2641 (TypeInstPtr*)(new TypeInstPtr(ptr, k, xk, o ,offset, instance_id))->hashcons(); | |
| 2642 | |
| 2643 return result; | |
| 2644 } | |
| 2645 | |
| 2646 | |
| 2647 //------------------------------cast_to_ptr_type------------------------------- | |
| 2648 const Type *TypeInstPtr::cast_to_ptr_type(PTR ptr) const { | |
| 2649 if( ptr == _ptr ) return this; | |
| 2650 // Reconstruct _sig info here since not a problem with later lazy | |
| 2651 // construction, _sig will show up on demand. | |
| 2652 return make(ptr, klass(), klass_is_exact(), const_oop(), _offset); | |
| 2653 } | |
| 2654 | |
| 2655 | |
| 2656 //-----------------------------cast_to_exactness------------------------------- | |
| 2657 const Type *TypeInstPtr::cast_to_exactness(bool klass_is_exact) const { | |
| 2658 if( klass_is_exact == _klass_is_exact ) return this; | |
| 2659 if (!UseExactTypes) return this; | |
| 2660 if (!_klass->is_loaded()) return this; | |
| 2661 ciInstanceKlass* ik = _klass->as_instance_klass(); | |
| 2662 if( (ik->is_final() || _const_oop) ) return this; // cannot clear xk | |
| 2663 if( ik->is_interface() ) return this; // cannot set xk | |
| 2664 return make(ptr(), klass(), klass_is_exact, const_oop(), _offset, _instance_id); | |
| 2665 } | |
| 2666 | |
| 2667 //-----------------------------cast_to_instance------------------------------- | |
| 2668 const TypeOopPtr *TypeInstPtr::cast_to_instance(int instance_id) const { | |
| 2669 if( instance_id == _instance_id) return this; | |
| 163 | 2670 bool exact = true; |
| 2671 PTR ptr_t = NotNull; | |
| 2672 if (instance_id == UNKNOWN_INSTANCE) { | |
| 2673 exact = _klass_is_exact; | |
| 2674 ptr_t = _ptr; | |
| 2675 } | |
| 2676 return make(ptr_t, klass(), exact, const_oop(), _offset, instance_id); | |
| 0 | 2677 } |
| 2678 | |
| 2679 //------------------------------xmeet_unloaded--------------------------------- | |
| 2680 // Compute the MEET of two InstPtrs when at least one is unloaded. | |
| 2681 // Assume classes are different since called after check for same name/class-loader | |
| 2682 const TypeInstPtr *TypeInstPtr::xmeet_unloaded(const TypeInstPtr *tinst) const { | |
| 2683 int off = meet_offset(tinst->offset()); | |
| 2684 PTR ptr = meet_ptr(tinst->ptr()); | |
| 2685 | |
| 2686 const TypeInstPtr *loaded = is_loaded() ? this : tinst; | |
| 2687 const TypeInstPtr *unloaded = is_loaded() ? tinst : this; | |
| 2688 if( loaded->klass()->equals(ciEnv::current()->Object_klass()) ) { | |
| 2689 // | |
| 2690 // Meet unloaded class with java/lang/Object | |
| 2691 // | |
| 2692 // Meet | |
| 2693 // | Unloaded Class | |
| 2694 // Object | TOP | AnyNull | Constant | NotNull | BOTTOM | | |
| 2695 // =================================================================== | |
| 2696 // TOP | ..........................Unloaded......................| | |
| 2697 // AnyNull | U-AN |................Unloaded......................| | |
| 2698 // Constant | ... O-NN .................................. | O-BOT | | |
| 2699 // NotNull | ... O-NN .................................. | O-BOT | | |
| 2700 // BOTTOM | ........................Object-BOTTOM ..................| | |
| 2701 // | |
| 2702 assert(loaded->ptr() != TypePtr::Null, "insanity check"); | |
| 2703 // | |
| 2704 if( loaded->ptr() == TypePtr::TopPTR ) { return unloaded; } | |
| 2705 else if (loaded->ptr() == TypePtr::AnyNull) { return TypeInstPtr::make( ptr, unloaded->klass() ); } | |
| 2706 else if (loaded->ptr() == TypePtr::BotPTR ) { return TypeInstPtr::BOTTOM; } | |
| 2707 else if (loaded->ptr() == TypePtr::Constant || loaded->ptr() == TypePtr::NotNull) { | |
| 2708 if (unloaded->ptr() == TypePtr::BotPTR ) { return TypeInstPtr::BOTTOM; } | |
| 2709 else { return TypeInstPtr::NOTNULL; } | |
| 2710 } | |
| 2711 else if( unloaded->ptr() == TypePtr::TopPTR ) { return unloaded; } | |
| 2712 | |
| 2713 return unloaded->cast_to_ptr_type(TypePtr::AnyNull)->is_instptr(); | |
| 2714 } | |
| 2715 | |
| 2716 // Both are unloaded, not the same class, not Object | |
| 2717 // Or meet unloaded with a different loaded class, not java/lang/Object | |
| 2718 if( ptr != TypePtr::BotPTR ) { | |
| 2719 return TypeInstPtr::NOTNULL; | |
| 2720 } | |
| 2721 return TypeInstPtr::BOTTOM; | |
| 2722 } | |
| 2723 | |
| 2724 | |
| 2725 //------------------------------meet------------------------------------------- | |
| 2726 // Compute the MEET of two types. It returns a new Type object. | |
| 2727 const Type *TypeInstPtr::xmeet( const Type *t ) const { | |
| 2728 // Perform a fast test for common case; meeting the same types together. | |
| 2729 if( this == t ) return this; // Meeting same type-rep? | |
| 2730 | |
| 2731 // Current "this->_base" is Pointer | |
| 2732 switch (t->base()) { // switch on original type | |
| 2733 | |
| 2734 case Int: // Mixing ints & oops happens when javac | |
| 2735 case Long: // reuses local variables | |
| 2736 case FloatTop: | |
| 2737 case FloatCon: | |
| 2738 case FloatBot: | |
| 2739 case DoubleTop: | |
| 2740 case DoubleCon: | |
| 2741 case DoubleBot: | |
|
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|
2742 case NarrowOop: |
| 0 | 2743 case Bottom: // Ye Olde Default |
| 2744 return Type::BOTTOM; | |
| 2745 case Top: | |
| 2746 return this; | |
| 2747 | |
| 2748 default: // All else is a mistake | |
| 2749 typerr(t); | |
| 2750 | |
| 2751 case RawPtr: return TypePtr::BOTTOM; | |
| 2752 | |
| 2753 case AryPtr: { // All arrays inherit from Object class | |
| 2754 const TypeAryPtr *tp = t->is_aryptr(); | |
| 2755 int offset = meet_offset(tp->offset()); | |
| 2756 PTR ptr = meet_ptr(tp->ptr()); | |
| 2757 int iid = meet_instance(tp->instance_id()); | |
| 2758 switch (ptr) { | |
| 2759 case TopPTR: | |
| 2760 case AnyNull: // Fall 'down' to dual of object klass | |
| 2761 if (klass()->equals(ciEnv::current()->Object_klass())) { | |
| 2762 return TypeAryPtr::make(ptr, tp->ary(), tp->klass(), tp->klass_is_exact(), offset, iid); | |
| 2763 } else { | |
| 2764 // cannot subclass, so the meet has to fall badly below the centerline | |
| 2765 ptr = NotNull; | |
| 2766 return TypeInstPtr::make( ptr, ciEnv::current()->Object_klass(), false, NULL, offset, iid); | |
| 2767 } | |
| 2768 case Constant: | |
| 2769 case NotNull: | |
| 2770 case BotPTR: // Fall down to object klass | |
| 2771 // LCA is object_klass, but if we subclass from the top we can do better | |
| 2772 if( above_centerline(_ptr) ) { // if( _ptr == TopPTR || _ptr == AnyNull ) | |
| 2773 // If 'this' (InstPtr) is above the centerline and it is Object class | |
| 2774 // then we can subclass in the Java class heirarchy. | |
| 2775 if (klass()->equals(ciEnv::current()->Object_klass())) { | |
| 2776 // that is, tp's array type is a subtype of my klass | |
| 2777 return TypeAryPtr::make(ptr, tp->ary(), tp->klass(), tp->klass_is_exact(), offset, iid); | |
| 2778 } | |
| 2779 } | |
| 2780 // The other case cannot happen, since I cannot be a subtype of an array. | |
| 2781 // The meet falls down to Object class below centerline. | |
| 2782 if( ptr == Constant ) | |
| 2783 ptr = NotNull; | |
| 2784 return make( ptr, ciEnv::current()->Object_klass(), false, NULL, offset, iid ); | |
| 2785 default: typerr(t); | |
| 2786 } | |
| 2787 } | |
| 2788 | |
| 2789 case OopPtr: { // Meeting to OopPtrs | |
| 2790 // Found a OopPtr type vs self-InstPtr type | |
| 2791 const TypePtr *tp = t->is_oopptr(); | |
| 2792 int offset = meet_offset(tp->offset()); | |
| 2793 PTR ptr = meet_ptr(tp->ptr()); | |
| 2794 switch (tp->ptr()) { | |
| 2795 case TopPTR: | |
| 2796 case AnyNull: | |
| 2797 return make(ptr, klass(), klass_is_exact(), | |
| 2798 (ptr == Constant ? const_oop() : NULL), offset); | |
| 2799 case NotNull: | |
| 2800 case BotPTR: | |
| 2801 return TypeOopPtr::make(ptr, offset); | |
| 2802 default: typerr(t); | |
| 2803 } | |
| 2804 } | |
| 2805 | |
| 2806 case AnyPtr: { // Meeting to AnyPtrs | |
| 2807 // Found an AnyPtr type vs self-InstPtr type | |
| 2808 const TypePtr *tp = t->is_ptr(); | |
| 2809 int offset = meet_offset(tp->offset()); | |
| 2810 PTR ptr = meet_ptr(tp->ptr()); | |
| 2811 switch (tp->ptr()) { | |
| 2812 case Null: | |
| 2813 if( ptr == Null ) return TypePtr::make( AnyPtr, ptr, offset ); | |
| 2814 case TopPTR: | |
| 2815 case AnyNull: | |
| 2816 return make( ptr, klass(), klass_is_exact(), | |
| 2817 (ptr == Constant ? const_oop() : NULL), offset ); | |
| 2818 case NotNull: | |
| 2819 case BotPTR: | |
| 2820 return TypePtr::make( AnyPtr, ptr, offset ); | |
| 2821 default: typerr(t); | |
| 2822 } | |
| 2823 } | |
| 2824 | |
| 2825 /* | |
| 2826 A-top } | |
| 2827 / | \ } Tops | |
| 2828 B-top A-any C-top } | |
| 2829 | / | \ | } Any-nulls | |
| 2830 B-any | C-any } | |
| 2831 | | | | |
| 2832 B-con A-con C-con } constants; not comparable across classes | |
| 2833 | | | | |
| 2834 B-not | C-not } | |
| 2835 | \ | / | } not-nulls | |
| 2836 B-bot A-not C-bot } | |
| 2837 \ | / } Bottoms | |
| 2838 A-bot } | |
| 2839 */ | |
| 2840 | |
| 2841 case InstPtr: { // Meeting 2 Oops? | |
| 2842 // Found an InstPtr sub-type vs self-InstPtr type | |
| 2843 const TypeInstPtr *tinst = t->is_instptr(); | |
| 2844 int off = meet_offset( tinst->offset() ); | |
| 2845 PTR ptr = meet_ptr( tinst->ptr() ); | |
| 2846 int instance_id = meet_instance(tinst->instance_id()); | |
| 2847 | |
| 2848 // Check for easy case; klasses are equal (and perhaps not loaded!) | |
| 2849 // If we have constants, then we created oops so classes are loaded | |
| 2850 // and we can handle the constants further down. This case handles | |
| 2851 // both-not-loaded or both-loaded classes | |
| 2852 if (ptr != Constant && klass()->equals(tinst->klass()) && klass_is_exact() == tinst->klass_is_exact()) { | |
| 2853 return make( ptr, klass(), klass_is_exact(), NULL, off, instance_id ); | |
| 2854 } | |
| 2855 | |
| 2856 // Classes require inspection in the Java klass hierarchy. Must be loaded. | |
| 2857 ciKlass* tinst_klass = tinst->klass(); | |
| 2858 ciKlass* this_klass = this->klass(); | |
| 2859 bool tinst_xk = tinst->klass_is_exact(); | |
| 2860 bool this_xk = this->klass_is_exact(); | |
| 2861 if (!tinst_klass->is_loaded() || !this_klass->is_loaded() ) { | |
| 2862 // One of these classes has not been loaded | |
| 2863 const TypeInstPtr *unloaded_meet = xmeet_unloaded(tinst); | |
| 2864 #ifndef PRODUCT | |
| 2865 if( PrintOpto && Verbose ) { | |
| 2866 tty->print("meet of unloaded classes resulted in: "); unloaded_meet->dump(); tty->cr(); | |
| 2867 tty->print(" this == "); this->dump(); tty->cr(); | |
| 2868 tty->print(" tinst == "); tinst->dump(); tty->cr(); | |
| 2869 } | |
| 2870 #endif | |
| 2871 return unloaded_meet; | |
| 2872 } | |
| 2873 | |
| 2874 // Handle mixing oops and interfaces first. | |
| 2875 if( this_klass->is_interface() && !tinst_klass->is_interface() ) { | |
| 2876 ciKlass *tmp = tinst_klass; // Swap interface around | |
| 2877 tinst_klass = this_klass; | |
| 2878 this_klass = tmp; | |
| 2879 bool tmp2 = tinst_xk; | |
| 2880 tinst_xk = this_xk; | |
| 2881 this_xk = tmp2; | |
| 2882 } | |
| 2883 if (tinst_klass->is_interface() && | |
| 2884 !(this_klass->is_interface() || | |
| 2885 // Treat java/lang/Object as an honorary interface, | |
| 2886 // because we need a bottom for the interface hierarchy. | |
| 2887 this_klass == ciEnv::current()->Object_klass())) { | |
| 2888 // Oop meets interface! | |
| 2889 | |
| 2890 // See if the oop subtypes (implements) interface. | |
| 2891 ciKlass *k; | |
| 2892 bool xk; | |
| 2893 if( this_klass->is_subtype_of( tinst_klass ) ) { | |
| 2894 // Oop indeed subtypes. Now keep oop or interface depending | |
| 2895 // on whether we are both above the centerline or either is | |
| 2896 // below the centerline. If we are on the centerline | |
| 2897 // (e.g., Constant vs. AnyNull interface), use the constant. | |
| 2898 k = below_centerline(ptr) ? tinst_klass : this_klass; | |
| 2899 // If we are keeping this_klass, keep its exactness too. | |
| 2900 xk = below_centerline(ptr) ? tinst_xk : this_xk; | |
| 2901 } else { // Does not implement, fall to Object | |
| 2902 // Oop does not implement interface, so mixing falls to Object | |
| 2903 // just like the verifier does (if both are above the | |
| 2904 // centerline fall to interface) | |
| 2905 k = above_centerline(ptr) ? tinst_klass : ciEnv::current()->Object_klass(); | |
| 2906 xk = above_centerline(ptr) ? tinst_xk : false; | |
| 2907 // Watch out for Constant vs. AnyNull interface. | |
| 2908 if (ptr == Constant) ptr = NotNull; // forget it was a constant | |
| 2909 } | |
| 2910 ciObject* o = NULL; // the Constant value, if any | |
| 2911 if (ptr == Constant) { | |
| 2912 // Find out which constant. | |
| 2913 o = (this_klass == klass()) ? const_oop() : tinst->const_oop(); | |
| 2914 } | |
| 2915 return make( ptr, k, xk, o, off ); | |
| 2916 } | |
| 2917 | |
| 2918 // Either oop vs oop or interface vs interface or interface vs Object | |
| 2919 | |
| 2920 // !!! Here's how the symmetry requirement breaks down into invariants: | |
| 2921 // If we split one up & one down AND they subtype, take the down man. | |
| 2922 // If we split one up & one down AND they do NOT subtype, "fall hard". | |
| 2923 // If both are up and they subtype, take the subtype class. | |
| 2924 // If both are up and they do NOT subtype, "fall hard". | |
| 2925 // If both are down and they subtype, take the supertype class. | |
| 2926 // If both are down and they do NOT subtype, "fall hard". | |
| 2927 // Constants treated as down. | |
| 2928 | |
| 2929 // Now, reorder the above list; observe that both-down+subtype is also | |
| 2930 // "fall hard"; "fall hard" becomes the default case: | |
| 2931 // If we split one up & one down AND they subtype, take the down man. | |
| 2932 // If both are up and they subtype, take the subtype class. | |
| 2933 | |
| 2934 // If both are down and they subtype, "fall hard". | |
| 2935 // If both are down and they do NOT subtype, "fall hard". | |
| 2936 // If both are up and they do NOT subtype, "fall hard". | |
| 2937 // If we split one up & one down AND they do NOT subtype, "fall hard". | |
| 2938 | |
| 2939 // If a proper subtype is exact, and we return it, we return it exactly. | |
| 2940 // If a proper supertype is exact, there can be no subtyping relationship! | |
| 2941 // If both types are equal to the subtype, exactness is and-ed below the | |
| 2942 // centerline and or-ed above it. (N.B. Constants are always exact.) | |
| 2943 | |
| 2944 // Check for subtyping: | |
| 2945 ciKlass *subtype = NULL; | |
| 2946 bool subtype_exact = false; | |
| 2947 if( tinst_klass->equals(this_klass) ) { | |
| 2948 subtype = this_klass; | |
| 2949 subtype_exact = below_centerline(ptr) ? (this_xk & tinst_xk) : (this_xk | tinst_xk); | |
| 2950 } else if( !tinst_xk && this_klass->is_subtype_of( tinst_klass ) ) { | |
| 2951 subtype = this_klass; // Pick subtyping class | |
| 2952 subtype_exact = this_xk; | |
| 2953 } else if( !this_xk && tinst_klass->is_subtype_of( this_klass ) ) { | |
| 2954 subtype = tinst_klass; // Pick subtyping class | |
| 2955 subtype_exact = tinst_xk; | |
| 2956 } | |
| 2957 | |
| 2958 if( subtype ) { | |
| 2959 if( above_centerline(ptr) ) { // both are up? | |
| 2960 this_klass = tinst_klass = subtype; | |
| 2961 this_xk = tinst_xk = subtype_exact; | |
| 2962 } else if( above_centerline(this ->_ptr) && !above_centerline(tinst->_ptr) ) { | |
| 2963 this_klass = tinst_klass; // tinst is down; keep down man | |
| 2964 this_xk = tinst_xk; | |
| 2965 } else if( above_centerline(tinst->_ptr) && !above_centerline(this ->_ptr) ) { | |
| 2966 tinst_klass = this_klass; // this is down; keep down man | |
| 2967 tinst_xk = this_xk; | |
| 2968 } else { | |
| 2969 this_xk = subtype_exact; // either they are equal, or we'll do an LCA | |
| 2970 } | |
| 2971 } | |
| 2972 | |
| 2973 // Check for classes now being equal | |
| 2974 if (tinst_klass->equals(this_klass)) { | |
| 2975 // If the klasses are equal, the constants may still differ. Fall to | |
| 2976 // NotNull if they do (neither constant is NULL; that is a special case | |
| 2977 // handled elsewhere). | |
| 2978 ciObject* o = NULL; // Assume not constant when done | |
| 2979 ciObject* this_oop = const_oop(); | |
| 2980 ciObject* tinst_oop = tinst->const_oop(); | |
| 2981 if( ptr == Constant ) { | |
| 2982 if (this_oop != NULL && tinst_oop != NULL && | |
| 2983 this_oop->equals(tinst_oop) ) | |
| 2984 o = this_oop; | |
| 2985 else if (above_centerline(this ->_ptr)) | |
| 2986 o = tinst_oop; | |
| 2987 else if (above_centerline(tinst ->_ptr)) | |
| 2988 o = this_oop; | |
| 2989 else | |
| 2990 ptr = NotNull; | |
| 2991 } | |
| 2992 return make( ptr, this_klass, this_xk, o, off, instance_id ); | |
| 2993 } // Else classes are not equal | |
| 2994 | |
| 2995 // Since klasses are different, we require a LCA in the Java | |
| 2996 // class hierarchy - which means we have to fall to at least NotNull. | |
| 2997 if( ptr == TopPTR || ptr == AnyNull || ptr == Constant ) | |
| 2998 ptr = NotNull; | |
| 2999 | |
| 3000 // Now we find the LCA of Java classes | |
| 3001 ciKlass* k = this_klass->least_common_ancestor(tinst_klass); | |
| 3002 return make( ptr, k, false, NULL, off ); | |
| 3003 } // End of case InstPtr | |
| 3004 | |
| 3005 case KlassPtr: | |
| 3006 return TypeInstPtr::BOTTOM; | |
| 3007 | |
| 3008 } // End of switch | |
| 3009 return this; // Return the double constant | |
| 3010 } | |
| 3011 | |
| 3012 | |
| 3013 //------------------------java_mirror_type-------------------------------------- | |
| 3014 ciType* TypeInstPtr::java_mirror_type() const { | |
| 3015 // must be a singleton type | |
| 3016 if( const_oop() == NULL ) return NULL; | |
| 3017 | |
| 3018 // must be of type java.lang.Class | |
| 3019 if( klass() != ciEnv::current()->Class_klass() ) return NULL; | |
| 3020 | |
| 3021 return const_oop()->as_instance()->java_mirror_type(); | |
| 3022 } | |
| 3023 | |
| 3024 | |
| 3025 //------------------------------xdual------------------------------------------ | |
| 3026 // Dual: do NOT dual on klasses. This means I do NOT understand the Java | |
| 3027 // inheritence mechanism. | |
| 3028 const Type *TypeInstPtr::xdual() const { | |
| 3029 return new TypeInstPtr( dual_ptr(), klass(), klass_is_exact(), const_oop(), dual_offset(), dual_instance() ); | |
| 3030 } | |
| 3031 | |
| 3032 //------------------------------eq--------------------------------------------- | |
| 3033 // Structural equality check for Type representations | |
| 3034 bool TypeInstPtr::eq( const Type *t ) const { | |
| 3035 const TypeInstPtr *p = t->is_instptr(); | |
| 3036 return | |
| 3037 klass()->equals(p->klass()) && | |
| 3038 TypeOopPtr::eq(p); // Check sub-type stuff | |
| 3039 } | |
| 3040 | |
| 3041 //------------------------------hash------------------------------------------- | |
| 3042 // Type-specific hashing function. | |
| 3043 int TypeInstPtr::hash(void) const { | |
| 3044 int hash = klass()->hash() + TypeOopPtr::hash(); | |
| 3045 return hash; | |
| 3046 } | |
| 3047 | |
| 3048 //------------------------------dump2------------------------------------------ | |
| 3049 // Dump oop Type | |
| 3050 #ifndef PRODUCT | |
| 3051 void TypeInstPtr::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 3052 // Print the name of the klass. | |
| 3053 klass()->print_name_on(st); | |
| 3054 | |
| 3055 switch( _ptr ) { | |
| 3056 case Constant: | |
| 3057 // TO DO: Make CI print the hex address of the underlying oop. | |
| 3058 if (WizardMode || Verbose) { | |
| 3059 const_oop()->print_oop(st); | |
| 3060 } | |
| 3061 case BotPTR: | |
| 3062 if (!WizardMode && !Verbose) { | |
| 3063 if( _klass_is_exact ) st->print(":exact"); | |
| 3064 break; | |
| 3065 } | |
| 3066 case TopPTR: | |
| 3067 case AnyNull: | |
| 3068 case NotNull: | |
| 3069 st->print(":%s", ptr_msg[_ptr]); | |
| 3070 if( _klass_is_exact ) st->print(":exact"); | |
| 3071 break; | |
| 3072 } | |
| 3073 | |
| 3074 if( _offset ) { // Dump offset, if any | |
| 3075 if( _offset == OffsetBot ) st->print("+any"); | |
| 3076 else if( _offset == OffsetTop ) st->print("+unknown"); | |
| 3077 else st->print("+%d", _offset); | |
| 3078 } | |
| 3079 | |
| 3080 st->print(" *"); | |
| 3081 if (_instance_id != UNKNOWN_INSTANCE) | |
| 3082 st->print(",iid=%d",_instance_id); | |
| 3083 } | |
| 3084 #endif | |
| 3085 | |
| 3086 //------------------------------add_offset------------------------------------- | |
| 3087 const TypePtr *TypeInstPtr::add_offset( int offset ) const { | |
| 3088 return make( _ptr, klass(), klass_is_exact(), const_oop(), xadd_offset(offset), _instance_id ); | |
| 3089 } | |
| 3090 | |
| 3091 //============================================================================= | |
| 3092 // Convenience common pre-built types. | |
| 3093 const TypeAryPtr *TypeAryPtr::RANGE; | |
| 3094 const TypeAryPtr *TypeAryPtr::OOPS; | |
| 163 | 3095 const TypeAryPtr *TypeAryPtr::NARROWOOPS; |
| 0 | 3096 const TypeAryPtr *TypeAryPtr::BYTES; |
| 3097 const TypeAryPtr *TypeAryPtr::SHORTS; | |
| 3098 const TypeAryPtr *TypeAryPtr::CHARS; | |
| 3099 const TypeAryPtr *TypeAryPtr::INTS; | |
| 3100 const TypeAryPtr *TypeAryPtr::LONGS; | |
| 3101 const TypeAryPtr *TypeAryPtr::FLOATS; | |
| 3102 const TypeAryPtr *TypeAryPtr::DOUBLES; | |
| 3103 | |
| 3104 //------------------------------make------------------------------------------- | |
| 3105 const TypeAryPtr *TypeAryPtr::make( PTR ptr, const TypeAry *ary, ciKlass* k, bool xk, int offset, int instance_id ) { | |
| 3106 assert(!(k == NULL && ary->_elem->isa_int()), | |
| 3107 "integral arrays must be pre-equipped with a class"); | |
| 3108 if (!xk) xk = ary->ary_must_be_exact(); | |
| 3109 if (instance_id != UNKNOWN_INSTANCE) | |
| 3110 xk = true; // instances are always exactly typed | |
| 3111 if (!UseExactTypes) xk = (ptr == Constant); | |
| 3112 return (TypeAryPtr*)(new TypeAryPtr(ptr, NULL, ary, k, xk, offset, instance_id))->hashcons(); | |
| 3113 } | |
| 3114 | |
| 3115 //------------------------------make------------------------------------------- | |
| 3116 const TypeAryPtr *TypeAryPtr::make( PTR ptr, ciObject* o, const TypeAry *ary, ciKlass* k, bool xk, int offset, int instance_id ) { | |
| 3117 assert(!(k == NULL && ary->_elem->isa_int()), | |
| 3118 "integral arrays must be pre-equipped with a class"); | |
| 3119 assert( (ptr==Constant && o) || (ptr!=Constant && !o), "" ); | |
| 3120 if (!xk) xk = (o != NULL) || ary->ary_must_be_exact(); | |
| 3121 if (instance_id != UNKNOWN_INSTANCE) | |
| 3122 xk = true; // instances are always exactly typed | |
| 3123 if (!UseExactTypes) xk = (ptr == Constant); | |
| 3124 return (TypeAryPtr*)(new TypeAryPtr(ptr, o, ary, k, xk, offset, instance_id))->hashcons(); | |
| 3125 } | |
| 3126 | |
| 3127 //------------------------------cast_to_ptr_type------------------------------- | |
| 3128 const Type *TypeAryPtr::cast_to_ptr_type(PTR ptr) const { | |
| 3129 if( ptr == _ptr ) return this; | |
| 3130 return make(ptr, const_oop(), _ary, klass(), klass_is_exact(), _offset); | |
| 3131 } | |
| 3132 | |
| 3133 | |
| 3134 //-----------------------------cast_to_exactness------------------------------- | |
| 3135 const Type *TypeAryPtr::cast_to_exactness(bool klass_is_exact) const { | |
| 3136 if( klass_is_exact == _klass_is_exact ) return this; | |
| 3137 if (!UseExactTypes) return this; | |
| 3138 if (_ary->ary_must_be_exact()) return this; // cannot clear xk | |
| 3139 return make(ptr(), const_oop(), _ary, klass(), klass_is_exact, _offset, _instance_id); | |
| 3140 } | |
| 3141 | |
| 3142 //-----------------------------cast_to_instance------------------------------- | |
| 3143 const TypeOopPtr *TypeAryPtr::cast_to_instance(int instance_id) const { | |
| 3144 if( instance_id == _instance_id) return this; | |
| 163 | 3145 bool exact = true; |
| 3146 PTR ptr_t = NotNull; | |
| 3147 if (instance_id == UNKNOWN_INSTANCE) { | |
| 3148 exact = _klass_is_exact; | |
| 3149 ptr_t = _ptr; | |
| 3150 } | |
| 3151 return make(ptr_t, const_oop(), _ary, klass(), exact, _offset, instance_id); | |
| 0 | 3152 } |
| 3153 | |
| 3154 //-----------------------------narrow_size_type------------------------------- | |
| 3155 // Local cache for arrayOopDesc::max_array_length(etype), | |
| 3156 // which is kind of slow (and cached elsewhere by other users). | |
| 3157 static jint max_array_length_cache[T_CONFLICT+1]; | |
| 3158 static jint max_array_length(BasicType etype) { | |
| 3159 jint& cache = max_array_length_cache[etype]; | |
| 3160 jint res = cache; | |
| 3161 if (res == 0) { | |
| 3162 switch (etype) { | |
|
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|
3163 case T_NARROWOOP: |
|
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coleenp
parents:
64
diff
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|
3164 etype = T_OBJECT; |
|
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coleenp
parents:
64
diff
changeset
|
3165 break; |
| 0 | 3166 case T_CONFLICT: |
| 3167 case T_ILLEGAL: | |
| 3168 case T_VOID: | |
| 3169 etype = T_BYTE; // will produce conservatively high value | |
| 3170 } | |
| 3171 cache = res = arrayOopDesc::max_array_length(etype); | |
| 3172 } | |
| 3173 return res; | |
| 3174 } | |
| 3175 | |
| 3176 // Narrow the given size type to the index range for the given array base type. | |
| 3177 // Return NULL if the resulting int type becomes empty. | |
| 3178 const TypeInt* TypeAryPtr::narrow_size_type(const TypeInt* size, BasicType elem) { | |
| 3179 jint hi = size->_hi; | |
| 3180 jint lo = size->_lo; | |
| 3181 jint min_lo = 0; | |
| 3182 jint max_hi = max_array_length(elem); | |
| 3183 //if (index_not_size) --max_hi; // type of a valid array index, FTR | |
| 3184 bool chg = false; | |
| 3185 if (lo < min_lo) { lo = min_lo; chg = true; } | |
| 3186 if (hi > max_hi) { hi = max_hi; chg = true; } | |
| 3187 if (lo > hi) | |
| 3188 return NULL; | |
| 3189 if (!chg) | |
| 3190 return size; | |
| 3191 return TypeInt::make(lo, hi, Type::WidenMin); | |
| 3192 } | |
| 3193 | |
| 3194 //-------------------------------cast_to_size---------------------------------- | |
| 3195 const TypeAryPtr* TypeAryPtr::cast_to_size(const TypeInt* new_size) const { | |
| 3196 assert(new_size != NULL, ""); | |
| 3197 new_size = narrow_size_type(new_size, elem()->basic_type()); | |
| 3198 if (new_size == NULL) // Negative length arrays will produce weird | |
| 3199 new_size = TypeInt::ZERO; // intermediate dead fast-path goo | |
| 3200 if (new_size == size()) return this; | |
| 3201 const TypeAry* new_ary = TypeAry::make(elem(), new_size); | |
| 3202 return make(ptr(), const_oop(), new_ary, klass(), klass_is_exact(), _offset); | |
| 3203 } | |
| 3204 | |
| 3205 | |
| 3206 //------------------------------eq--------------------------------------------- | |
| 3207 // Structural equality check for Type representations | |
| 3208 bool TypeAryPtr::eq( const Type *t ) const { | |
| 3209 const TypeAryPtr *p = t->is_aryptr(); | |
| 3210 return | |
| 3211 _ary == p->_ary && // Check array | |
| 3212 TypeOopPtr::eq(p); // Check sub-parts | |
| 3213 } | |
| 3214 | |
| 3215 //------------------------------hash------------------------------------------- | |
| 3216 // Type-specific hashing function. | |
| 3217 int TypeAryPtr::hash(void) const { | |
| 3218 return (intptr_t)_ary + TypeOopPtr::hash(); | |
| 3219 } | |
| 3220 | |
| 3221 //------------------------------meet------------------------------------------- | |
| 3222 // Compute the MEET of two types. It returns a new Type object. | |
| 3223 const Type *TypeAryPtr::xmeet( const Type *t ) const { | |
| 3224 // Perform a fast test for common case; meeting the same types together. | |
| 3225 if( this == t ) return this; // Meeting same type-rep? | |
| 3226 // Current "this->_base" is Pointer | |
| 3227 switch (t->base()) { // switch on original type | |
| 3228 | |
| 3229 // Mixing ints & oops happens when javac reuses local variables | |
| 3230 case Int: | |
| 3231 case Long: | |
| 3232 case FloatTop: | |
| 3233 case FloatCon: | |
| 3234 case FloatBot: | |
| 3235 case DoubleTop: | |
| 3236 case DoubleCon: | |
| 3237 case DoubleBot: | |
|
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3238 case NarrowOop: |
| 0 | 3239 case Bottom: // Ye Olde Default |
| 3240 return Type::BOTTOM; | |
| 3241 case Top: | |
| 3242 return this; | |
| 3243 | |
| 3244 default: // All else is a mistake | |
| 3245 typerr(t); | |
| 3246 | |
| 3247 case OopPtr: { // Meeting to OopPtrs | |
| 3248 // Found a OopPtr type vs self-AryPtr type | |
| 3249 const TypePtr *tp = t->is_oopptr(); | |
| 3250 int offset = meet_offset(tp->offset()); | |
| 3251 PTR ptr = meet_ptr(tp->ptr()); | |
| 3252 switch (tp->ptr()) { | |
| 3253 case TopPTR: | |
| 3254 case AnyNull: | |
| 3255 return make(ptr, (ptr == Constant ? const_oop() : NULL), _ary, _klass, _klass_is_exact, offset); | |
| 3256 case BotPTR: | |
| 3257 case NotNull: | |
| 3258 return TypeOopPtr::make(ptr, offset); | |
| 3259 default: ShouldNotReachHere(); | |
| 3260 } | |
| 3261 } | |
| 3262 | |
| 3263 case AnyPtr: { // Meeting two AnyPtrs | |
| 3264 // Found an AnyPtr type vs self-AryPtr type | |
| 3265 const TypePtr *tp = t->is_ptr(); | |
| 3266 int offset = meet_offset(tp->offset()); | |
| 3267 PTR ptr = meet_ptr(tp->ptr()); | |
| 3268 switch (tp->ptr()) { | |
| 3269 case TopPTR: | |
| 3270 return this; | |
| 3271 case BotPTR: | |
| 3272 case NotNull: | |
| 3273 return TypePtr::make(AnyPtr, ptr, offset); | |
| 3274 case Null: | |
| 3275 if( ptr == Null ) return TypePtr::make(AnyPtr, ptr, offset); | |
| 3276 case AnyNull: | |
| 3277 return make( ptr, (ptr == Constant ? const_oop() : NULL), _ary, _klass, _klass_is_exact, offset ); | |
| 3278 default: ShouldNotReachHere(); | |
| 3279 } | |
| 3280 } | |
| 3281 | |
| 3282 case RawPtr: return TypePtr::BOTTOM; | |
| 3283 | |
| 3284 case AryPtr: { // Meeting 2 references? | |
| 3285 const TypeAryPtr *tap = t->is_aryptr(); | |
| 3286 int off = meet_offset(tap->offset()); | |
| 3287 const TypeAry *tary = _ary->meet(tap->_ary)->is_ary(); | |
| 3288 PTR ptr = meet_ptr(tap->ptr()); | |
| 3289 int iid = meet_instance(tap->instance_id()); | |
| 3290 ciKlass* lazy_klass = NULL; | |
| 3291 if (tary->_elem->isa_int()) { | |
| 3292 // Integral array element types have irrelevant lattice relations. | |
| 3293 // It is the klass that determines array layout, not the element type. | |
| 3294 if (_klass == NULL) | |
| 3295 lazy_klass = tap->_klass; | |
| 3296 else if (tap->_klass == NULL || tap->_klass == _klass) { | |
| 3297 lazy_klass = _klass; | |
| 3298 } else { | |
| 3299 // Something like byte[int+] meets char[int+]. | |
| 3300 // This must fall to bottom, not (int[-128..65535])[int+]. | |
| 3301 tary = TypeAry::make(Type::BOTTOM, tary->_size); | |
| 3302 } | |
| 3303 } | |
| 3304 bool xk; | |
| 3305 switch (tap->ptr()) { | |
| 3306 case AnyNull: | |
| 3307 case TopPTR: | |
| 3308 // Compute new klass on demand, do not use tap->_klass | |
| 3309 xk = (tap->_klass_is_exact | this->_klass_is_exact); | |
|
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3310 return make( ptr, const_oop(), tary, lazy_klass, xk, off, iid ); |
| 0 | 3311 case Constant: { |
| 3312 ciObject* o = const_oop(); | |
| 3313 if( _ptr == Constant ) { | |
| 3314 if( tap->const_oop() != NULL && !o->equals(tap->const_oop()) ) { | |
| 3315 ptr = NotNull; | |
| 3316 o = NULL; | |
| 3317 } | |
| 3318 } else if( above_centerline(_ptr) ) { | |
| 3319 o = tap->const_oop(); | |
| 3320 } | |
| 3321 xk = true; | |
|
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3322 return TypeAryPtr::make( ptr, o, tary, tap->_klass, xk, off, iid ); |
| 0 | 3323 } |
| 3324 case NotNull: | |
| 3325 case BotPTR: | |
| 3326 // Compute new klass on demand, do not use tap->_klass | |
| 3327 if (above_centerline(this->_ptr)) | |
| 3328 xk = tap->_klass_is_exact; | |
| 3329 else if (above_centerline(tap->_ptr)) | |
| 3330 xk = this->_klass_is_exact; | |
| 3331 else xk = (tap->_klass_is_exact & this->_klass_is_exact) && | |
| 3332 (klass() == tap->klass()); // Only precise for identical arrays | |
| 3333 return TypeAryPtr::make( ptr, NULL, tary, lazy_klass, xk, off, iid ); | |
| 3334 default: ShouldNotReachHere(); | |
| 3335 } | |
| 3336 } | |
| 3337 | |
| 3338 // All arrays inherit from Object class | |
| 3339 case InstPtr: { | |
| 3340 const TypeInstPtr *tp = t->is_instptr(); | |
| 3341 int offset = meet_offset(tp->offset()); | |
| 3342 PTR ptr = meet_ptr(tp->ptr()); | |
| 3343 int iid = meet_instance(tp->instance_id()); | |
| 3344 switch (ptr) { | |
| 3345 case TopPTR: | |
| 3346 case AnyNull: // Fall 'down' to dual of object klass | |
| 3347 if( tp->klass()->equals(ciEnv::current()->Object_klass()) ) { | |
| 3348 return TypeAryPtr::make( ptr, _ary, _klass, _klass_is_exact, offset, iid ); | |
| 3349 } else { | |
| 3350 // cannot subclass, so the meet has to fall badly below the centerline | |
| 3351 ptr = NotNull; | |
| 3352 return TypeInstPtr::make( ptr, ciEnv::current()->Object_klass(), false, NULL,offset, iid); | |
| 3353 } | |
| 3354 case Constant: | |
| 3355 case NotNull: | |
| 3356 case BotPTR: // Fall down to object klass | |
| 3357 // LCA is object_klass, but if we subclass from the top we can do better | |
| 3358 if (above_centerline(tp->ptr())) { | |
| 3359 // If 'tp' is above the centerline and it is Object class | |
| 3360 // then we can subclass in the Java class heirarchy. | |
| 3361 if( tp->klass()->equals(ciEnv::current()->Object_klass()) ) { | |
| 3362 // that is, my array type is a subtype of 'tp' klass | |
| 3363 return make( ptr, _ary, _klass, _klass_is_exact, offset, iid ); | |
| 3364 } | |
| 3365 } | |
| 3366 // The other case cannot happen, since t cannot be a subtype of an array. | |
| 3367 // The meet falls down to Object class below centerline. | |
| 3368 if( ptr == Constant ) | |
| 3369 ptr = NotNull; | |
| 3370 return TypeInstPtr::make( ptr, ciEnv::current()->Object_klass(), false, NULL,offset, iid); | |
| 3371 default: typerr(t); | |
| 3372 } | |
| 3373 } | |
| 3374 | |
| 3375 case KlassPtr: | |
| 3376 return TypeInstPtr::BOTTOM; | |
| 3377 | |
| 3378 } | |
| 3379 return this; // Lint noise | |
| 3380 } | |
| 3381 | |
| 3382 //------------------------------xdual------------------------------------------ | |
| 3383 // Dual: compute field-by-field dual | |
| 3384 const Type *TypeAryPtr::xdual() const { | |
| 3385 return new TypeAryPtr( dual_ptr(), _const_oop, _ary->dual()->is_ary(),_klass, _klass_is_exact, dual_offset(), dual_instance() ); | |
| 3386 } | |
| 3387 | |
| 3388 //------------------------------dump2------------------------------------------ | |
| 3389 #ifndef PRODUCT | |
| 3390 void TypeAryPtr::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 3391 _ary->dump2(d,depth,st); | |
| 3392 switch( _ptr ) { | |
| 3393 case Constant: | |
| 3394 const_oop()->print(st); | |
| 3395 break; | |
| 3396 case BotPTR: | |
| 3397 if (!WizardMode && !Verbose) { | |
| 3398 if( _klass_is_exact ) st->print(":exact"); | |
| 3399 break; | |
| 3400 } | |
| 3401 case TopPTR: | |
| 3402 case AnyNull: | |
| 3403 case NotNull: | |
| 3404 st->print(":%s", ptr_msg[_ptr]); | |
| 3405 if( _klass_is_exact ) st->print(":exact"); | |
| 3406 break; | |
| 3407 } | |
| 3408 | |
|
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3409 if( _offset != 0 ) { |
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3410 int header_size = objArrayOopDesc::header_size() * wordSize; |
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3411 if( _offset == OffsetTop ) st->print("+undefined"); |
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3412 else if( _offset == OffsetBot ) st->print("+any"); |
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3413 else if( _offset < header_size ) st->print("+%d", _offset); |
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3414 else { |
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3415 BasicType basic_elem_type = elem()->basic_type(); |
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3416 int array_base = arrayOopDesc::base_offset_in_bytes(basic_elem_type); |
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3417 int elem_size = type2aelembytes(basic_elem_type); |
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3418 st->print("[%d]", (_offset - array_base)/elem_size); |
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3419 } |
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3420 } |
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|
3421 st->print(" *"); |
| 0 | 3422 if (_instance_id != UNKNOWN_INSTANCE) |
| 3423 st->print(",iid=%d",_instance_id); | |
| 3424 } | |
| 3425 #endif | |
| 3426 | |
| 3427 bool TypeAryPtr::empty(void) const { | |
| 3428 if (_ary->empty()) return true; | |
| 3429 return TypeOopPtr::empty(); | |
| 3430 } | |
| 3431 | |
| 3432 //------------------------------add_offset------------------------------------- | |
| 3433 const TypePtr *TypeAryPtr::add_offset( int offset ) const { | |
| 3434 return make( _ptr, _const_oop, _ary, _klass, _klass_is_exact, xadd_offset(offset), _instance_id ); | |
| 3435 } | |
| 3436 | |
| 3437 | |
| 3438 //============================================================================= | |
|
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3439 const TypeNarrowOop *TypeNarrowOop::BOTTOM; |
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3440 const TypeNarrowOop *TypeNarrowOop::NULL_PTR; |
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3441 |
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3442 |
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3443 const TypeNarrowOop* TypeNarrowOop::make(const TypePtr* type) { |
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3444 return (const TypeNarrowOop*)(new TypeNarrowOop(type))->hashcons(); |
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3445 } |
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3446 |
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3447 //------------------------------hash------------------------------------------- |
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3448 // Type-specific hashing function. |
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3449 int TypeNarrowOop::hash(void) const { |
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3450 return _ooptype->hash() + 7; |
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3451 } |
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3452 |
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3453 |
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3454 bool TypeNarrowOop::eq( const Type *t ) const { |
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3455 const TypeNarrowOop* tc = t->isa_narrowoop(); |
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3456 if (tc != NULL) { |
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3457 if (_ooptype->base() != tc->_ooptype->base()) { |
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3458 return false; |
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3459 } |
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3460 return tc->_ooptype->eq(_ooptype); |
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3461 } |
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3462 return false; |
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3463 } |
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3464 |
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3465 bool TypeNarrowOop::singleton(void) const { // TRUE if type is a singleton |
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3466 return _ooptype->singleton(); |
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3467 } |
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3468 |
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3469 bool TypeNarrowOop::empty(void) const { |
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3470 return _ooptype->empty(); |
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3471 } |
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3472 |
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|
3473 //------------------------------meet------------------------------------------- |
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3474 // Compute the MEET of two types. It returns a new Type object. |
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3475 const Type *TypeNarrowOop::xmeet( const Type *t ) const { |
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3476 // Perform a fast test for common case; meeting the same types together. |
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3477 if( this == t ) return this; // Meeting same type-rep? |
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3478 |
|
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|
3479 |
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3480 // Current "this->_base" is OopPtr |
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3481 switch (t->base()) { // switch on original type |
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3482 |
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3483 case Int: // Mixing ints & oops happens when javac |
|
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3484 case Long: // reuses local variables |
|
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|
3485 case FloatTop: |
|
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|
3486 case FloatCon: |
|
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|
3487 case FloatBot: |
|
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|
3488 case DoubleTop: |
|
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|
3489 case DoubleCon: |
|
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|
3490 case DoubleBot: |
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|
3491 case Bottom: // Ye Olde Default |
|
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3492 return Type::BOTTOM; |
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|
3493 case Top: |
|
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|
3494 return this; |
|
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|
3495 |
|
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|
3496 case NarrowOop: { |
|
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|
3497 const Type* result = _ooptype->xmeet(t->is_narrowoop()->make_oopptr()); |
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|
3498 if (result->isa_ptr()) { |
|
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|
3499 return TypeNarrowOop::make(result->is_ptr()); |
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|
3500 } |
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|
3501 return result; |
|
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|
3502 } |
|
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|
3503 |
|
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|
3504 default: // All else is a mistake |
|
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|
3505 typerr(t); |
|
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|
3506 |
|
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|
3507 case RawPtr: |
|
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|
3508 case AnyPtr: |
|
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|
3509 case OopPtr: |
|
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|
3510 case InstPtr: |
|
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|
3511 case KlassPtr: |
|
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|
3512 case AryPtr: |
|
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|
3513 typerr(t); |
|
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|
3514 return Type::BOTTOM; |
|
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|
3515 |
|
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|
3516 } // End of switch |
|
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|
3517 } |
|
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|
3518 |
|
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|
3519 const Type *TypeNarrowOop::xdual() const { // Compute dual right now. |
|
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|
3520 const TypePtr* odual = _ooptype->dual()->is_ptr(); |
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|
3521 return new TypeNarrowOop(odual); |
|
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|
3522 } |
|
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|
3523 |
|
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|
3524 const Type *TypeNarrowOop::filter( const Type *kills ) const { |
|
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|
3525 if (kills->isa_narrowoop()) { |
|
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|
3526 const Type* ft =_ooptype->filter(kills->is_narrowoop()->_ooptype); |
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|
3527 if (ft->empty()) |
|
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|
3528 return Type::TOP; // Canonical empty value |
|
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|
3529 if (ft->isa_ptr()) { |
|
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|
3530 return make(ft->isa_ptr()); |
|
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|
3531 } |
|
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|
3532 return ft; |
|
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|
3533 } else if (kills->isa_ptr()) { |
|
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|
3534 const Type* ft = _ooptype->join(kills); |
|
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|
3535 if (ft->empty()) |
|
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|
3536 return Type::TOP; // Canonical empty value |
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|
3537 return ft; |
|
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|
3538 } else { |
|
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|
3539 return Type::TOP; |
|
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|
3540 } |
|
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|
3541 } |
|
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|
3542 |
|
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|
3543 |
|
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|
3544 intptr_t TypeNarrowOop::get_con() const { |
|
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|
3545 return _ooptype->get_con(); |
|
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|
3546 } |
|
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|
3547 |
|
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|
3548 #ifndef PRODUCT |
|
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|
3549 void TypeNarrowOop::dump2( Dict & d, uint depth, outputStream *st ) const { |
|
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|
3550 tty->print("narrowoop: "); |
|
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|
3551 _ooptype->dump2(d, depth, st); |
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|
3552 } |
|
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|
3553 #endif |
|
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|
3554 |
|
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|
3555 |
|
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|
3556 //============================================================================= |
| 0 | 3557 // Convenience common pre-built types. |
| 3558 | |
| 3559 // Not-null object klass or below | |
| 3560 const TypeKlassPtr *TypeKlassPtr::OBJECT; | |
| 3561 const TypeKlassPtr *TypeKlassPtr::OBJECT_OR_NULL; | |
| 3562 | |
| 3563 //------------------------------TypeKlasPtr------------------------------------ | |
| 3564 TypeKlassPtr::TypeKlassPtr( PTR ptr, ciKlass* klass, int offset ) | |
| 3565 : TypeOopPtr(KlassPtr, ptr, klass, (ptr==Constant), (ptr==Constant ? klass : NULL), offset, 0) { | |
| 3566 } | |
| 3567 | |
| 3568 //------------------------------make------------------------------------------- | |
| 3569 // ptr to klass 'k', if Constant, or possibly to a sub-klass if not a Constant | |
| 3570 const TypeKlassPtr *TypeKlassPtr::make( PTR ptr, ciKlass* k, int offset ) { | |
| 3571 assert( k != NULL, "Expect a non-NULL klass"); | |
| 3572 assert(k->is_instance_klass() || k->is_array_klass() || | |
| 3573 k->is_method_klass(), "Incorrect type of klass oop"); | |
| 3574 TypeKlassPtr *r = | |
| 3575 (TypeKlassPtr*)(new TypeKlassPtr(ptr, k, offset))->hashcons(); | |
| 3576 | |
| 3577 return r; | |
| 3578 } | |
| 3579 | |
| 3580 //------------------------------eq--------------------------------------------- | |
| 3581 // Structural equality check for Type representations | |
| 3582 bool TypeKlassPtr::eq( const Type *t ) const { | |
| 3583 const TypeKlassPtr *p = t->is_klassptr(); | |
| 3584 return | |
| 3585 klass()->equals(p->klass()) && | |
| 3586 TypeOopPtr::eq(p); | |
| 3587 } | |
| 3588 | |
| 3589 //------------------------------hash------------------------------------------- | |
| 3590 // Type-specific hashing function. | |
| 3591 int TypeKlassPtr::hash(void) const { | |
| 3592 return klass()->hash() + TypeOopPtr::hash(); | |
| 3593 } | |
| 3594 | |
| 3595 | |
| 3596 //------------------------------klass------------------------------------------ | |
| 3597 // Return the defining klass for this class | |
| 3598 ciKlass* TypeAryPtr::klass() const { | |
| 3599 if( _klass ) return _klass; // Return cached value, if possible | |
| 3600 | |
| 3601 // Oops, need to compute _klass and cache it | |
| 3602 ciKlass* k_ary = NULL; | |
| 3603 const TypeInstPtr *tinst; | |
| 3604 const TypeAryPtr *tary; | |
|
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3605 const Type* el = elem(); |
|
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|
3606 if (el->isa_narrowoop()) { |
|
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|
3607 el = el->is_narrowoop()->make_oopptr(); |
|
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|
3608 } |
|
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|
3609 |
| 0 | 3610 // Get element klass |
|
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|
3611 if ((tinst = el->isa_instptr()) != NULL) { |
| 0 | 3612 // Compute array klass from element klass |
| 3613 k_ary = ciObjArrayKlass::make(tinst->klass()); | |
|
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|
3614 } else if ((tary = el->isa_aryptr()) != NULL) { |
| 0 | 3615 // Compute array klass from element klass |
| 3616 ciKlass* k_elem = tary->klass(); | |
| 3617 // If element type is something like bottom[], k_elem will be null. | |
| 3618 if (k_elem != NULL) | |
| 3619 k_ary = ciObjArrayKlass::make(k_elem); | |
|
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|
3620 } else if ((el->base() == Type::Top) || |
|
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|
3621 (el->base() == Type::Bottom)) { |
| 0 | 3622 // element type of Bottom occurs from meet of basic type |
| 3623 // and object; Top occurs when doing join on Bottom. | |
| 3624 // Leave k_ary at NULL. | |
| 3625 } else { | |
| 3626 // Cannot compute array klass directly from basic type, | |
| 3627 // since subtypes of TypeInt all have basic type T_INT. | |
|
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|
3628 assert(!el->isa_int(), |
| 0 | 3629 "integral arrays must be pre-equipped with a class"); |
| 3630 // Compute array klass directly from basic type | |
|
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3631 k_ary = ciTypeArrayKlass::make(el->basic_type()); |
| 0 | 3632 } |
| 3633 | |
| 163 | 3634 if( this != TypeAryPtr::OOPS ) { |
| 0 | 3635 // The _klass field acts as a cache of the underlying |
| 3636 // ciKlass for this array type. In order to set the field, | |
| 3637 // we need to cast away const-ness. | |
| 3638 // | |
| 3639 // IMPORTANT NOTE: we *never* set the _klass field for the | |
| 3640 // type TypeAryPtr::OOPS. This Type is shared between all | |
| 3641 // active compilations. However, the ciKlass which represents | |
| 3642 // this Type is *not* shared between compilations, so caching | |
| 3643 // this value would result in fetching a dangling pointer. | |
| 3644 // | |
| 3645 // Recomputing the underlying ciKlass for each request is | |
| 3646 // a bit less efficient than caching, but calls to | |
| 3647 // TypeAryPtr::OOPS->klass() are not common enough to matter. | |
| 3648 ((TypeAryPtr*)this)->_klass = k_ary; | |
| 163 | 3649 if (UseCompressedOops && k_ary != NULL && k_ary->is_obj_array_klass() && |
| 3650 _offset != 0 && _offset != arrayOopDesc::length_offset_in_bytes()) { | |
| 3651 ((TypeAryPtr*)this)->_is_ptr_to_narrowoop = true; | |
| 3652 } | |
| 3653 } | |
| 0 | 3654 return k_ary; |
| 3655 } | |
| 3656 | |
| 3657 | |
| 3658 //------------------------------add_offset------------------------------------- | |
| 3659 // Access internals of klass object | |
| 3660 const TypePtr *TypeKlassPtr::add_offset( int offset ) const { | |
| 3661 return make( _ptr, klass(), xadd_offset(offset) ); | |
| 3662 } | |
| 3663 | |
| 3664 //------------------------------cast_to_ptr_type------------------------------- | |
| 3665 const Type *TypeKlassPtr::cast_to_ptr_type(PTR ptr) const { | |
| 3666 assert(_base == OopPtr, "subclass must override cast_to_ptr_type"); | |
| 3667 if( ptr == _ptr ) return this; | |
| 3668 return make(ptr, _klass, _offset); | |
| 3669 } | |
| 3670 | |
| 3671 | |
| 3672 //-----------------------------cast_to_exactness------------------------------- | |
| 3673 const Type *TypeKlassPtr::cast_to_exactness(bool klass_is_exact) const { | |
| 3674 if( klass_is_exact == _klass_is_exact ) return this; | |
| 3675 if (!UseExactTypes) return this; | |
| 3676 return make(klass_is_exact ? Constant : NotNull, _klass, _offset); | |
| 3677 } | |
| 3678 | |
| 3679 | |
| 3680 //-----------------------------as_instance_type-------------------------------- | |
| 3681 // Corresponding type for an instance of the given class. | |
| 3682 // It will be NotNull, and exact if and only if the klass type is exact. | |
| 3683 const TypeOopPtr* TypeKlassPtr::as_instance_type() const { | |
| 3684 ciKlass* k = klass(); | |
| 3685 bool xk = klass_is_exact(); | |
| 3686 //return TypeInstPtr::make(TypePtr::NotNull, k, xk, NULL, 0); | |
| 3687 const TypeOopPtr* toop = TypeOopPtr::make_from_klass_raw(k); | |
| 3688 toop = toop->cast_to_ptr_type(TypePtr::NotNull)->is_oopptr(); | |
| 3689 return toop->cast_to_exactness(xk)->is_oopptr(); | |
| 3690 } | |
| 3691 | |
| 3692 | |
| 3693 //------------------------------xmeet------------------------------------------ | |
| 3694 // Compute the MEET of two types, return a new Type object. | |
| 3695 const Type *TypeKlassPtr::xmeet( const Type *t ) const { | |
| 3696 // Perform a fast test for common case; meeting the same types together. | |
| 3697 if( this == t ) return this; // Meeting same type-rep? | |
| 3698 | |
| 3699 // Current "this->_base" is Pointer | |
| 3700 switch (t->base()) { // switch on original type | |
| 3701 | |
| 3702 case Int: // Mixing ints & oops happens when javac | |
| 3703 case Long: // reuses local variables | |
| 3704 case FloatTop: | |
| 3705 case FloatCon: | |
| 3706 case FloatBot: | |
| 3707 case DoubleTop: | |
| 3708 case DoubleCon: | |
| 3709 case DoubleBot: | |
| 3710 case Bottom: // Ye Olde Default | |
| 3711 return Type::BOTTOM; | |
| 3712 case Top: | |
| 3713 return this; | |
| 3714 | |
| 3715 default: // All else is a mistake | |
| 3716 typerr(t); | |
| 3717 | |
| 3718 case RawPtr: return TypePtr::BOTTOM; | |
| 3719 | |
| 3720 case OopPtr: { // Meeting to OopPtrs | |
| 3721 // Found a OopPtr type vs self-KlassPtr type | |
| 3722 const TypePtr *tp = t->is_oopptr(); | |
| 3723 int offset = meet_offset(tp->offset()); | |
| 3724 PTR ptr = meet_ptr(tp->ptr()); | |
| 3725 switch (tp->ptr()) { | |
| 3726 case TopPTR: | |
| 3727 case AnyNull: | |
| 3728 return make(ptr, klass(), offset); | |
| 3729 case BotPTR: | |
| 3730 case NotNull: | |
| 3731 return TypePtr::make(AnyPtr, ptr, offset); | |
| 3732 default: typerr(t); | |
| 3733 } | |
| 3734 } | |
| 3735 | |
| 3736 case AnyPtr: { // Meeting to AnyPtrs | |
| 3737 // Found an AnyPtr type vs self-KlassPtr type | |
| 3738 const TypePtr *tp = t->is_ptr(); | |
| 3739 int offset = meet_offset(tp->offset()); | |
| 3740 PTR ptr = meet_ptr(tp->ptr()); | |
| 3741 switch (tp->ptr()) { | |
| 3742 case TopPTR: | |
| 3743 return this; | |
| 3744 case Null: | |
| 3745 if( ptr == Null ) return TypePtr::make( AnyPtr, ptr, offset ); | |
| 3746 case AnyNull: | |
| 3747 return make( ptr, klass(), offset ); | |
| 3748 case BotPTR: | |
| 3749 case NotNull: | |
| 3750 return TypePtr::make(AnyPtr, ptr, offset); | |
| 3751 default: typerr(t); | |
| 3752 } | |
| 3753 } | |
| 3754 | |
| 3755 case AryPtr: // Meet with AryPtr | |
| 3756 case InstPtr: // Meet with InstPtr | |
| 3757 return TypeInstPtr::BOTTOM; | |
| 3758 | |
| 3759 // | |
| 3760 // A-top } | |
| 3761 // / | \ } Tops | |
| 3762 // B-top A-any C-top } | |
| 3763 // | / | \ | } Any-nulls | |
| 3764 // B-any | C-any } | |
| 3765 // | | | | |
| 3766 // B-con A-con C-con } constants; not comparable across classes | |
| 3767 // | | | | |
| 3768 // B-not | C-not } | |
| 3769 // | \ | / | } not-nulls | |
| 3770 // B-bot A-not C-bot } | |
| 3771 // \ | / } Bottoms | |
| 3772 // A-bot } | |
| 3773 // | |
| 3774 | |
| 3775 case KlassPtr: { // Meet two KlassPtr types | |
| 3776 const TypeKlassPtr *tkls = t->is_klassptr(); | |
| 3777 int off = meet_offset(tkls->offset()); | |
| 3778 PTR ptr = meet_ptr(tkls->ptr()); | |
| 3779 | |
| 3780 // Check for easy case; klasses are equal (and perhaps not loaded!) | |
| 3781 // If we have constants, then we created oops so classes are loaded | |
| 3782 // and we can handle the constants further down. This case handles | |
| 3783 // not-loaded classes | |
| 3784 if( ptr != Constant && tkls->klass()->equals(klass()) ) { | |
| 3785 return make( ptr, klass(), off ); | |
| 3786 } | |
| 3787 | |
| 3788 // Classes require inspection in the Java klass hierarchy. Must be loaded. | |
| 3789 ciKlass* tkls_klass = tkls->klass(); | |
| 3790 ciKlass* this_klass = this->klass(); | |
| 3791 assert( tkls_klass->is_loaded(), "This class should have been loaded."); | |
| 3792 assert( this_klass->is_loaded(), "This class should have been loaded."); | |
| 3793 | |
| 3794 // If 'this' type is above the centerline and is a superclass of the | |
| 3795 // other, we can treat 'this' as having the same type as the other. | |
| 3796 if ((above_centerline(this->ptr())) && | |
| 3797 tkls_klass->is_subtype_of(this_klass)) { | |
| 3798 this_klass = tkls_klass; | |
| 3799 } | |
| 3800 // If 'tinst' type is above the centerline and is a superclass of the | |
| 3801 // other, we can treat 'tinst' as having the same type as the other. | |
| 3802 if ((above_centerline(tkls->ptr())) && | |
| 3803 this_klass->is_subtype_of(tkls_klass)) { | |
| 3804 tkls_klass = this_klass; | |
| 3805 } | |
| 3806 | |
| 3807 // Check for classes now being equal | |
| 3808 if (tkls_klass->equals(this_klass)) { | |
| 3809 // If the klasses are equal, the constants may still differ. Fall to | |
| 3810 // NotNull if they do (neither constant is NULL; that is a special case | |
| 3811 // handled elsewhere). | |
| 3812 ciObject* o = NULL; // Assume not constant when done | |
| 3813 ciObject* this_oop = const_oop(); | |
| 3814 ciObject* tkls_oop = tkls->const_oop(); | |
| 3815 if( ptr == Constant ) { | |
| 3816 if (this_oop != NULL && tkls_oop != NULL && | |
| 3817 this_oop->equals(tkls_oop) ) | |
| 3818 o = this_oop; | |
| 3819 else if (above_centerline(this->ptr())) | |
| 3820 o = tkls_oop; | |
| 3821 else if (above_centerline(tkls->ptr())) | |
| 3822 o = this_oop; | |
| 3823 else | |
| 3824 ptr = NotNull; | |
| 3825 } | |
| 3826 return make( ptr, this_klass, off ); | |
| 3827 } // Else classes are not equal | |
| 3828 | |
| 3829 // Since klasses are different, we require the LCA in the Java | |
| 3830 // class hierarchy - which means we have to fall to at least NotNull. | |
| 3831 if( ptr == TopPTR || ptr == AnyNull || ptr == Constant ) | |
| 3832 ptr = NotNull; | |
| 3833 // Now we find the LCA of Java classes | |
| 3834 ciKlass* k = this_klass->least_common_ancestor(tkls_klass); | |
| 3835 return make( ptr, k, off ); | |
| 3836 } // End of case KlassPtr | |
| 3837 | |
| 3838 } // End of switch | |
| 3839 return this; // Return the double constant | |
| 3840 } | |
| 3841 | |
| 3842 //------------------------------xdual------------------------------------------ | |
| 3843 // Dual: compute field-by-field dual | |
| 3844 const Type *TypeKlassPtr::xdual() const { | |
| 3845 return new TypeKlassPtr( dual_ptr(), klass(), dual_offset() ); | |
| 3846 } | |
| 3847 | |
| 3848 //------------------------------dump2------------------------------------------ | |
| 3849 // Dump Klass Type | |
| 3850 #ifndef PRODUCT | |
| 3851 void TypeKlassPtr::dump2( Dict & d, uint depth, outputStream *st ) const { | |
| 3852 switch( _ptr ) { | |
| 3853 case Constant: | |
| 3854 st->print("precise "); | |
| 3855 case NotNull: | |
| 3856 { | |
| 3857 const char *name = klass()->name()->as_utf8(); | |
| 3858 if( name ) { | |
| 3859 st->print("klass %s: " INTPTR_FORMAT, name, klass()); | |
| 3860 } else { | |
| 3861 ShouldNotReachHere(); | |
| 3862 } | |
| 3863 } | |
| 3864 case BotPTR: | |
| 3865 if( !WizardMode && !Verbose && !_klass_is_exact ) break; | |
| 3866 case TopPTR: | |
| 3867 case AnyNull: | |
| 3868 st->print(":%s", ptr_msg[_ptr]); | |
| 3869 if( _klass_is_exact ) st->print(":exact"); | |
| 3870 break; | |
| 3871 } | |
| 3872 | |
| 3873 if( _offset ) { // Dump offset, if any | |
| 3874 if( _offset == OffsetBot ) { st->print("+any"); } | |
| 3875 else if( _offset == OffsetTop ) { st->print("+unknown"); } | |
| 3876 else { st->print("+%d", _offset); } | |
| 3877 } | |
| 3878 | |
| 3879 st->print(" *"); | |
| 3880 } | |
| 3881 #endif | |
| 3882 | |
| 3883 | |
| 3884 | |
| 3885 //============================================================================= | |
| 3886 // Convenience common pre-built types. | |
| 3887 | |
| 3888 //------------------------------make------------------------------------------- | |
| 3889 const TypeFunc *TypeFunc::make( const TypeTuple *domain, const TypeTuple *range ) { | |
| 3890 return (TypeFunc*)(new TypeFunc(domain,range))->hashcons(); | |
| 3891 } | |
| 3892 | |
| 3893 //------------------------------make------------------------------------------- | |
| 3894 const TypeFunc *TypeFunc::make(ciMethod* method) { | |
| 3895 Compile* C = Compile::current(); | |
| 3896 const TypeFunc* tf = C->last_tf(method); // check cache | |
| 3897 if (tf != NULL) return tf; // The hit rate here is almost 50%. | |
| 3898 const TypeTuple *domain; | |
| 3899 if (method->flags().is_static()) { | |
| 3900 domain = TypeTuple::make_domain(NULL, method->signature()); | |
| 3901 } else { | |
| 3902 domain = TypeTuple::make_domain(method->holder(), method->signature()); | |
| 3903 } | |
| 3904 const TypeTuple *range = TypeTuple::make_range(method->signature()); | |
| 3905 tf = TypeFunc::make(domain, range); | |
| 3906 C->set_last_tf(method, tf); // fill cache | |
| 3907 return tf; | |
| 3908 } | |
| 3909 | |
| 3910 //------------------------------meet------------------------------------------- | |
| 3911 // Compute the MEET of two types. It returns a new Type object. | |
| 3912 const Type *TypeFunc::xmeet( const Type *t ) const { | |
| 3913 // Perform a fast test for common case; meeting the same types together. | |
| 3914 if( this == t ) return this; // Meeting same type-rep? | |
| 3915 | |
| 3916 // Current "this->_base" is Func | |
| 3917 switch (t->base()) { // switch on original type | |
| 3918 | |
| 3919 case Bottom: // Ye Olde Default | |
| 3920 return t; | |
| 3921 | |
| 3922 default: // All else is a mistake | |
| 3923 typerr(t); | |
| 3924 | |
| 3925 case Top: | |
| 3926 break; | |
| 3927 } | |
| 3928 return this; // Return the double constant | |
| 3929 } | |
| 3930 | |
| 3931 //------------------------------xdual------------------------------------------ | |
| 3932 // Dual: compute field-by-field dual | |
| 3933 const Type *TypeFunc::xdual() const { | |
| 3934 return this; | |
| 3935 } | |
| 3936 | |
| 3937 //------------------------------eq--------------------------------------------- | |
| 3938 // Structural equality check for Type representations | |
| 3939 bool TypeFunc::eq( const Type *t ) const { | |
| 3940 const TypeFunc *a = (const TypeFunc*)t; | |
| 3941 return _domain == a->_domain && | |
| 3942 _range == a->_range; | |
| 3943 } | |
| 3944 | |
| 3945 //------------------------------hash------------------------------------------- | |
| 3946 // Type-specific hashing function. | |
| 3947 int TypeFunc::hash(void) const { | |
| 3948 return (intptr_t)_domain + (intptr_t)_range; | |
| 3949 } | |
| 3950 | |
| 3951 //------------------------------dump2------------------------------------------ | |
| 3952 // Dump Function Type | |
| 3953 #ifndef PRODUCT | |
| 3954 void TypeFunc::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 3955 if( _range->_cnt <= Parms ) | |
| 3956 st->print("void"); | |
| 3957 else { | |
| 3958 uint i; | |
| 3959 for (i = Parms; i < _range->_cnt-1; i++) { | |
| 3960 _range->field_at(i)->dump2(d,depth,st); | |
| 3961 st->print("/"); | |
| 3962 } | |
| 3963 _range->field_at(i)->dump2(d,depth,st); | |
| 3964 } | |
| 3965 st->print(" "); | |
| 3966 st->print("( "); | |
| 3967 if( !depth || d[this] ) { // Check for recursive dump | |
| 3968 st->print("...)"); | |
| 3969 return; | |
| 3970 } | |
| 3971 d.Insert((void*)this,(void*)this); // Stop recursion | |
| 3972 if (Parms < _domain->_cnt) | |
| 3973 _domain->field_at(Parms)->dump2(d,depth-1,st); | |
| 3974 for (uint i = Parms+1; i < _domain->_cnt; i++) { | |
| 3975 st->print(", "); | |
| 3976 _domain->field_at(i)->dump2(d,depth-1,st); | |
| 3977 } | |
| 3978 st->print(" )"); | |
| 3979 } | |
| 3980 | |
| 3981 //------------------------------print_flattened-------------------------------- | |
| 3982 // Print a 'flattened' signature | |
| 3983 static const char * const flat_type_msg[Type::lastype] = { | |
|
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6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
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diff
changeset
|
3984 "bad","control","top","int","long","_", "narrowoop", |
| 0 | 3985 "tuple:", "array:", |
| 3986 "ptr", "rawptr", "ptr", "ptr", "ptr", "ptr", | |
| 3987 "func", "abIO", "return_address", "mem", | |
| 3988 "float_top", "ftcon:", "flt", | |
| 3989 "double_top", "dblcon:", "dbl", | |
| 3990 "bottom" | |
| 3991 }; | |
| 3992 | |
| 3993 void TypeFunc::print_flattened() const { | |
| 3994 if( _range->_cnt <= Parms ) | |
| 3995 tty->print("void"); | |
| 3996 else { | |
| 3997 uint i; | |
| 3998 for (i = Parms; i < _range->_cnt-1; i++) | |
| 3999 tty->print("%s/",flat_type_msg[_range->field_at(i)->base()]); | |
| 4000 tty->print("%s",flat_type_msg[_range->field_at(i)->base()]); | |
| 4001 } | |
| 4002 tty->print(" ( "); | |
| 4003 if (Parms < _domain->_cnt) | |
| 4004 tty->print("%s",flat_type_msg[_domain->field_at(Parms)->base()]); | |
| 4005 for (uint i = Parms+1; i < _domain->_cnt; i++) | |
| 4006 tty->print(", %s",flat_type_msg[_domain->field_at(i)->base()]); | |
| 4007 tty->print(" )"); | |
| 4008 } | |
| 4009 #endif | |
| 4010 | |
| 4011 //------------------------------singleton-------------------------------------- | |
| 4012 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
| 4013 // constants (Ldi nodes). Singletons are integer, float or double constants | |
| 4014 // or a single symbol. | |
| 4015 bool TypeFunc::singleton(void) const { | |
| 4016 return false; // Never a singleton | |
| 4017 } | |
| 4018 | |
| 4019 bool TypeFunc::empty(void) const { | |
| 4020 return false; // Never empty | |
| 4021 } | |
| 4022 | |
| 4023 | |
| 4024 BasicType TypeFunc::return_type() const{ | |
| 4025 if (range()->cnt() == TypeFunc::Parms) { | |
| 4026 return T_VOID; | |
| 4027 } | |
| 4028 return range()->field_at(TypeFunc::Parms)->basic_type(); | |
| 4029 } |