Mercurial > hg > truffle
annotate src/share/vm/opto/type.cpp @ 306:af945ba2e739
6741738: TypePtr::add_offset() set incorrect offset when the add overflows
Summary: Set offset to OffsetBot when the add overflows in TypePtr::add_offset()
Reviewed-by: jrose, never
| author | kvn |
|---|---|
| date | Wed, 27 Aug 2008 14:47:32 -0700 |
| parents | c3e045194476 |
| children | 8261ee795323 |
| 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 } | |
| 223 | 171 |
| 0 | 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 = make_ptr()->meet(t->make_ptr()); |
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495 return result->make_narrowoop(); |
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496 } |
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497 |
| 0 | 498 const Type *mt = xmeet(t); |
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499 if (isa_narrowoop() || t->isa_narrowoop()) return mt; |
| 0 | 500 #ifdef ASSERT |
| 501 assert( mt == t->xmeet(this), "meet not commutative" ); | |
| 502 const Type* dual_join = mt->_dual; | |
| 503 const Type *t2t = dual_join->xmeet(t->_dual); | |
| 504 const Type *t2this = dual_join->xmeet( _dual); | |
| 505 | |
| 506 // Interface meet Oop is Not Symmetric: | |
| 507 // Interface:AnyNull meet Oop:AnyNull == Interface:AnyNull | |
| 508 // Interface:NotNull meet Oop:NotNull == java/lang/Object:NotNull | |
| 509 const TypeInstPtr* this_inst = this->isa_instptr(); | |
| 510 const TypeInstPtr* t_inst = t->isa_instptr(); | |
| 511 bool interface_vs_oop = false; | |
| 512 if( this_inst && this_inst->is_loaded() && t_inst && t_inst->is_loaded() ) { | |
| 513 bool this_interface = this_inst->klass()->is_interface(); | |
| 514 bool t_interface = t_inst->klass()->is_interface(); | |
| 515 interface_vs_oop = this_interface ^ t_interface; | |
| 516 } | |
| 223 | 517 |
| 518 if( !interface_vs_oop && (t2t != t->_dual || t2this != _dual) ) { | |
| 0 | 519 tty->print_cr("=== Meet Not Symmetric ==="); |
| 520 tty->print("t = "); t->dump(); tty->cr(); | |
| 521 tty->print("this= "); dump(); tty->cr(); | |
| 522 tty->print("mt=(t meet this)= "); mt->dump(); tty->cr(); | |
| 523 | |
| 524 tty->print("t_dual= "); t->_dual->dump(); tty->cr(); | |
| 525 tty->print("this_dual= "); _dual->dump(); tty->cr(); | |
| 526 tty->print("mt_dual= "); mt->_dual->dump(); tty->cr(); | |
| 527 | |
| 528 tty->print("mt_dual meet t_dual= "); t2t ->dump(); tty->cr(); | |
| 529 tty->print("mt_dual meet this_dual= "); t2this ->dump(); tty->cr(); | |
| 530 | |
| 531 fatal("meet not symmetric" ); | |
| 532 } | |
| 533 #endif | |
| 534 return mt; | |
| 535 } | |
| 536 | |
| 537 //------------------------------xmeet------------------------------------------ | |
| 538 // Compute the MEET of two types. It returns a new Type object. | |
| 539 const Type *Type::xmeet( const Type *t ) const { | |
| 540 // Perform a fast test for common case; meeting the same types together. | |
| 541 if( this == t ) return this; // Meeting same type-rep? | |
| 542 | |
| 543 // Meeting TOP with anything? | |
| 544 if( _base == Top ) return t; | |
| 545 | |
| 546 // Meeting BOTTOM with anything? | |
| 547 if( _base == Bottom ) return BOTTOM; | |
| 548 | |
| 549 // Current "this->_base" is one of: Bad, Multi, Control, Top, | |
| 550 // Abio, Abstore, Floatxxx, Doublexxx, Bottom, lastype. | |
| 551 switch (t->base()) { // Switch on original type | |
| 552 | |
| 553 // Cut in half the number of cases I must handle. Only need cases for when | |
| 554 // the given enum "t->type" is less than or equal to the local enum "type". | |
| 555 case FloatCon: | |
| 556 case DoubleCon: | |
| 557 case Int: | |
| 558 case Long: | |
| 559 return t->xmeet(this); | |
| 560 | |
| 561 case OopPtr: | |
| 562 return t->xmeet(this); | |
| 563 | |
| 564 case InstPtr: | |
| 565 return t->xmeet(this); | |
| 566 | |
| 567 case KlassPtr: | |
| 568 return t->xmeet(this); | |
| 569 | |
| 570 case AryPtr: | |
| 571 return t->xmeet(this); | |
| 572 | |
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573 case NarrowOop: |
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574 return t->xmeet(this); |
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575 |
| 0 | 576 case Bad: // Type check |
| 577 default: // Bogus type not in lattice | |
| 578 typerr(t); | |
| 579 return Type::BOTTOM; | |
| 580 | |
| 581 case Bottom: // Ye Olde Default | |
| 582 return t; | |
| 583 | |
| 584 case FloatTop: | |
| 585 if( _base == FloatTop ) return this; | |
| 586 case FloatBot: // Float | |
| 587 if( _base == FloatBot || _base == FloatTop ) return FLOAT; | |
| 588 if( _base == DoubleTop || _base == DoubleBot ) return Type::BOTTOM; | |
| 589 typerr(t); | |
| 590 return Type::BOTTOM; | |
| 591 | |
| 592 case DoubleTop: | |
| 593 if( _base == DoubleTop ) return this; | |
| 594 case DoubleBot: // Double | |
| 595 if( _base == DoubleBot || _base == DoubleTop ) return DOUBLE; | |
| 596 if( _base == FloatTop || _base == FloatBot ) return Type::BOTTOM; | |
| 597 typerr(t); | |
| 598 return Type::BOTTOM; | |
| 599 | |
| 600 // These next few cases must match exactly or it is a compile-time error. | |
| 601 case Control: // Control of code | |
| 602 case Abio: // State of world outside of program | |
| 603 case Memory: | |
| 604 if( _base == t->_base ) return this; | |
| 605 typerr(t); | |
| 606 return Type::BOTTOM; | |
| 607 | |
| 608 case Top: // Top of the lattice | |
| 609 return this; | |
| 610 } | |
| 611 | |
| 612 // The type is unchanged | |
| 613 return this; | |
| 614 } | |
| 615 | |
| 616 //-----------------------------filter------------------------------------------ | |
| 617 const Type *Type::filter( const Type *kills ) const { | |
| 618 const Type* ft = join(kills); | |
| 619 if (ft->empty()) | |
| 620 return Type::TOP; // Canonical empty value | |
| 621 return ft; | |
| 622 } | |
| 623 | |
| 624 //------------------------------xdual------------------------------------------ | |
| 625 // Compute dual right now. | |
| 626 const Type::TYPES Type::dual_type[Type::lastype] = { | |
| 627 Bad, // Bad | |
| 628 Control, // Control | |
| 629 Bottom, // Top | |
| 630 Bad, // Int - handled in v-call | |
| 631 Bad, // Long - handled in v-call | |
| 632 Half, // Half | |
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633 Bad, // NarrowOop - handled in v-call |
| 0 | 634 |
| 635 Bad, // Tuple - handled in v-call | |
| 636 Bad, // Array - handled in v-call | |
| 637 | |
| 638 Bad, // AnyPtr - handled in v-call | |
| 639 Bad, // RawPtr - handled in v-call | |
| 640 Bad, // OopPtr - handled in v-call | |
| 641 Bad, // InstPtr - handled in v-call | |
| 642 Bad, // AryPtr - handled in v-call | |
| 643 Bad, // KlassPtr - handled in v-call | |
| 644 | |
| 645 Bad, // Function - handled in v-call | |
| 646 Abio, // Abio | |
| 647 Return_Address,// Return_Address | |
| 648 Memory, // Memory | |
| 649 FloatBot, // FloatTop | |
| 650 FloatCon, // FloatCon | |
| 651 FloatTop, // FloatBot | |
| 652 DoubleBot, // DoubleTop | |
| 653 DoubleCon, // DoubleCon | |
| 654 DoubleTop, // DoubleBot | |
| 655 Top // Bottom | |
| 656 }; | |
| 657 | |
| 658 const Type *Type::xdual() const { | |
| 659 // Note: the base() accessor asserts the sanity of _base. | |
| 660 assert(dual_type[base()] != Bad, "implement with v-call"); | |
| 661 return new Type(dual_type[_base]); | |
| 662 } | |
| 663 | |
| 664 //------------------------------has_memory------------------------------------- | |
| 665 bool Type::has_memory() const { | |
| 666 Type::TYPES tx = base(); | |
| 667 if (tx == Memory) return true; | |
| 668 if (tx == Tuple) { | |
| 669 const TypeTuple *t = is_tuple(); | |
| 670 for (uint i=0; i < t->cnt(); i++) { | |
| 671 tx = t->field_at(i)->base(); | |
| 672 if (tx == Memory) return true; | |
| 673 } | |
| 674 } | |
| 675 return false; | |
| 676 } | |
| 677 | |
| 678 #ifndef PRODUCT | |
| 679 //------------------------------dump2------------------------------------------ | |
| 680 void Type::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 681 st->print(msg[_base]); | |
| 682 } | |
| 683 | |
| 684 //------------------------------dump------------------------------------------- | |
| 685 void Type::dump_on(outputStream *st) const { | |
| 686 ResourceMark rm; | |
| 687 Dict d(cmpkey,hashkey); // Stop recursive type dumping | |
| 688 dump2(d,1, st); | |
| 163 | 689 if (is_ptr_to_narrowoop()) { |
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690 st->print(" [narrow]"); |
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691 } |
| 0 | 692 } |
| 693 | |
| 694 //------------------------------data------------------------------------------- | |
| 695 const char * const Type::msg[Type::lastype] = { | |
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696 "bad","control","top","int:","long:","half", "narrowoop:", |
| 0 | 697 "tuple:", "aryptr", |
| 698 "anyptr:", "rawptr:", "java:", "inst:", "ary:", "klass:", | |
| 699 "func", "abIO", "return_address", "memory", | |
| 700 "float_top", "ftcon:", "float", | |
| 701 "double_top", "dblcon:", "double", | |
| 702 "bottom" | |
| 703 }; | |
| 704 #endif | |
| 705 | |
| 706 //------------------------------singleton-------------------------------------- | |
| 707 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
| 708 // constants (Ldi nodes). Singletons are integer, float or double constants. | |
| 709 bool Type::singleton(void) const { | |
| 710 return _base == Top || _base == Half; | |
| 711 } | |
| 712 | |
| 713 //------------------------------empty------------------------------------------ | |
| 714 // TRUE if Type is a type with no values, FALSE otherwise. | |
| 715 bool Type::empty(void) const { | |
| 716 switch (_base) { | |
| 717 case DoubleTop: | |
| 718 case FloatTop: | |
| 719 case Top: | |
| 720 return true; | |
| 721 | |
| 722 case Half: | |
| 723 case Abio: | |
| 724 case Return_Address: | |
| 725 case Memory: | |
| 726 case Bottom: | |
| 727 case FloatBot: | |
| 728 case DoubleBot: | |
| 729 return false; // never a singleton, therefore never empty | |
| 730 } | |
| 731 | |
| 732 ShouldNotReachHere(); | |
| 733 return false; | |
| 734 } | |
| 735 | |
| 736 //------------------------------dump_stats------------------------------------- | |
| 737 // Dump collected statistics to stderr | |
| 738 #ifndef PRODUCT | |
| 739 void Type::dump_stats() { | |
| 740 tty->print("Types made: %d\n", type_dict()->Size()); | |
| 741 } | |
| 742 #endif | |
| 743 | |
| 744 //------------------------------typerr----------------------------------------- | |
| 745 void Type::typerr( const Type *t ) const { | |
| 746 #ifndef PRODUCT | |
| 747 tty->print("\nError mixing types: "); | |
| 748 dump(); | |
| 749 tty->print(" and "); | |
| 750 t->dump(); | |
| 751 tty->print("\n"); | |
| 752 #endif | |
| 753 ShouldNotReachHere(); | |
| 754 } | |
| 755 | |
| 756 //------------------------------isa_oop_ptr------------------------------------ | |
| 757 // Return true if type is an oop pointer type. False for raw pointers. | |
| 758 static char isa_oop_ptr_tbl[Type::lastype] = { | |
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759 0,0,0,0,0,0,0/*narrowoop*/,0/*tuple*/, 0/*ary*/, |
| 0 | 760 0/*anyptr*/,0/*rawptr*/,1/*OopPtr*/,1/*InstPtr*/,1/*AryPtr*/,1/*KlassPtr*/, |
| 761 0/*func*/,0,0/*return_address*/,0, | |
| 762 /*floats*/0,0,0, /*doubles*/0,0,0, | |
| 763 0 | |
| 764 }; | |
| 765 bool Type::isa_oop_ptr() const { | |
| 766 return isa_oop_ptr_tbl[_base] != 0; | |
| 767 } | |
| 768 | |
| 769 //------------------------------dump_stats------------------------------------- | |
| 770 // // Check that arrays match type enum | |
| 771 #ifndef PRODUCT | |
| 772 void Type::verify_lastype() { | |
| 773 // Check that arrays match enumeration | |
| 774 assert( Type::dual_type [Type::lastype - 1] == Type::Top, "did not update array"); | |
| 775 assert( strcmp(Type::msg [Type::lastype - 1],"bottom") == 0, "did not update array"); | |
| 776 // assert( PhiNode::tbl [Type::lastype - 1] == NULL, "did not update array"); | |
| 777 assert( Matcher::base2reg[Type::lastype - 1] == 0, "did not update array"); | |
| 778 assert( isa_oop_ptr_tbl [Type::lastype - 1] == (char)0, "did not update array"); | |
| 779 } | |
| 780 #endif | |
| 781 | |
| 782 //============================================================================= | |
| 783 // Convenience common pre-built types. | |
| 784 const TypeF *TypeF::ZERO; // Floating point zero | |
| 785 const TypeF *TypeF::ONE; // Floating point one | |
| 786 | |
| 787 //------------------------------make------------------------------------------- | |
| 788 // Create a float constant | |
| 789 const TypeF *TypeF::make(float f) { | |
| 790 return (TypeF*)(new TypeF(f))->hashcons(); | |
| 791 } | |
| 792 | |
| 793 //------------------------------meet------------------------------------------- | |
| 794 // Compute the MEET of two types. It returns a new Type object. | |
| 795 const Type *TypeF::xmeet( const Type *t ) const { | |
| 796 // Perform a fast test for common case; meeting the same types together. | |
| 797 if( this == t ) return this; // Meeting same type-rep? | |
| 798 | |
| 799 // Current "this->_base" is FloatCon | |
| 800 switch (t->base()) { // Switch on original type | |
| 801 case AnyPtr: // Mixing with oops happens when javac | |
| 802 case RawPtr: // reuses local variables | |
| 803 case OopPtr: | |
| 804 case InstPtr: | |
| 805 case KlassPtr: | |
| 806 case AryPtr: | |
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807 case NarrowOop: |
| 0 | 808 case Int: |
| 809 case Long: | |
| 810 case DoubleTop: | |
| 811 case DoubleCon: | |
| 812 case DoubleBot: | |
| 813 case Bottom: // Ye Olde Default | |
| 814 return Type::BOTTOM; | |
| 815 | |
| 816 case FloatBot: | |
| 817 return t; | |
| 818 | |
| 819 default: // All else is a mistake | |
| 820 typerr(t); | |
| 821 | |
| 822 case FloatCon: // Float-constant vs Float-constant? | |
| 823 if( jint_cast(_f) != jint_cast(t->getf()) ) // unequal constants? | |
| 824 // must compare bitwise as positive zero, negative zero and NaN have | |
| 825 // all the same representation in C++ | |
| 826 return FLOAT; // Return generic float | |
| 827 // Equal constants | |
| 828 case Top: | |
| 829 case FloatTop: | |
| 830 break; // Return the float constant | |
| 831 } | |
| 832 return this; // Return the float constant | |
| 833 } | |
| 834 | |
| 835 //------------------------------xdual------------------------------------------ | |
| 836 // Dual: symmetric | |
| 837 const Type *TypeF::xdual() const { | |
| 838 return this; | |
| 839 } | |
| 840 | |
| 841 //------------------------------eq--------------------------------------------- | |
| 842 // Structural equality check for Type representations | |
| 843 bool TypeF::eq( const Type *t ) const { | |
| 844 if( g_isnan(_f) || | |
| 845 g_isnan(t->getf()) ) { | |
| 846 // One or both are NANs. If both are NANs return true, else false. | |
| 847 return (g_isnan(_f) && g_isnan(t->getf())); | |
| 848 } | |
| 849 if (_f == t->getf()) { | |
| 850 // (NaN is impossible at this point, since it is not equal even to itself) | |
| 851 if (_f == 0.0) { | |
| 852 // difference between positive and negative zero | |
| 853 if (jint_cast(_f) != jint_cast(t->getf())) return false; | |
| 854 } | |
| 855 return true; | |
| 856 } | |
| 857 return false; | |
| 858 } | |
| 859 | |
| 860 //------------------------------hash------------------------------------------- | |
| 861 // Type-specific hashing function. | |
| 862 int TypeF::hash(void) const { | |
| 863 return *(int*)(&_f); | |
| 864 } | |
| 865 | |
| 866 //------------------------------is_finite-------------------------------------- | |
| 867 // Has a finite value | |
| 868 bool TypeF::is_finite() const { | |
| 869 return g_isfinite(getf()) != 0; | |
| 870 } | |
| 871 | |
| 872 //------------------------------is_nan----------------------------------------- | |
| 873 // Is not a number (NaN) | |
| 874 bool TypeF::is_nan() const { | |
| 875 return g_isnan(getf()) != 0; | |
| 876 } | |
| 877 | |
| 878 //------------------------------dump2------------------------------------------ | |
| 879 // Dump float constant Type | |
| 880 #ifndef PRODUCT | |
| 881 void TypeF::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 882 Type::dump2(d,depth, st); | |
| 883 st->print("%f", _f); | |
| 884 } | |
| 885 #endif | |
| 886 | |
| 887 //------------------------------singleton-------------------------------------- | |
| 888 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
| 889 // constants (Ldi nodes). Singletons are integer, float or double constants | |
| 890 // or a single symbol. | |
| 891 bool TypeF::singleton(void) const { | |
| 892 return true; // Always a singleton | |
| 893 } | |
| 894 | |
| 895 bool TypeF::empty(void) const { | |
| 896 return false; // always exactly a singleton | |
| 897 } | |
| 898 | |
| 899 //============================================================================= | |
| 900 // Convenience common pre-built types. | |
| 901 const TypeD *TypeD::ZERO; // Floating point zero | |
| 902 const TypeD *TypeD::ONE; // Floating point one | |
| 903 | |
| 904 //------------------------------make------------------------------------------- | |
| 905 const TypeD *TypeD::make(double d) { | |
| 906 return (TypeD*)(new TypeD(d))->hashcons(); | |
| 907 } | |
| 908 | |
| 909 //------------------------------meet------------------------------------------- | |
| 910 // Compute the MEET of two types. It returns a new Type object. | |
| 911 const Type *TypeD::xmeet( const Type *t ) const { | |
| 912 // Perform a fast test for common case; meeting the same types together. | |
| 913 if( this == t ) return this; // Meeting same type-rep? | |
| 914 | |
| 915 // Current "this->_base" is DoubleCon | |
| 916 switch (t->base()) { // Switch on original type | |
| 917 case AnyPtr: // Mixing with oops happens when javac | |
| 918 case RawPtr: // reuses local variables | |
| 919 case OopPtr: | |
| 920 case InstPtr: | |
| 921 case KlassPtr: | |
| 922 case AryPtr: | |
|
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923 case NarrowOop: |
| 0 | 924 case Int: |
| 925 case Long: | |
| 926 case FloatTop: | |
| 927 case FloatCon: | |
| 928 case FloatBot: | |
| 929 case Bottom: // Ye Olde Default | |
| 930 return Type::BOTTOM; | |
| 931 | |
| 932 case DoubleBot: | |
| 933 return t; | |
| 934 | |
| 935 default: // All else is a mistake | |
| 936 typerr(t); | |
| 937 | |
| 938 case DoubleCon: // Double-constant vs Double-constant? | |
| 939 if( jlong_cast(_d) != jlong_cast(t->getd()) ) // unequal constants? (see comment in TypeF::xmeet) | |
| 940 return DOUBLE; // Return generic double | |
| 941 case Top: | |
| 942 case DoubleTop: | |
| 943 break; | |
| 944 } | |
| 945 return this; // Return the double constant | |
| 946 } | |
| 947 | |
| 948 //------------------------------xdual------------------------------------------ | |
| 949 // Dual: symmetric | |
| 950 const Type *TypeD::xdual() const { | |
| 951 return this; | |
| 952 } | |
| 953 | |
| 954 //------------------------------eq--------------------------------------------- | |
| 955 // Structural equality check for Type representations | |
| 956 bool TypeD::eq( const Type *t ) const { | |
| 957 if( g_isnan(_d) || | |
| 958 g_isnan(t->getd()) ) { | |
| 959 // One or both are NANs. If both are NANs return true, else false. | |
| 960 return (g_isnan(_d) && g_isnan(t->getd())); | |
| 961 } | |
| 962 if (_d == t->getd()) { | |
| 963 // (NaN is impossible at this point, since it is not equal even to itself) | |
| 964 if (_d == 0.0) { | |
| 965 // difference between positive and negative zero | |
| 966 if (jlong_cast(_d) != jlong_cast(t->getd())) return false; | |
| 967 } | |
| 968 return true; | |
| 969 } | |
| 970 return false; | |
| 971 } | |
| 972 | |
| 973 //------------------------------hash------------------------------------------- | |
| 974 // Type-specific hashing function. | |
| 975 int TypeD::hash(void) const { | |
| 976 return *(int*)(&_d); | |
| 977 } | |
| 978 | |
| 979 //------------------------------is_finite-------------------------------------- | |
| 980 // Has a finite value | |
| 981 bool TypeD::is_finite() const { | |
| 982 return g_isfinite(getd()) != 0; | |
| 983 } | |
| 984 | |
| 985 //------------------------------is_nan----------------------------------------- | |
| 986 // Is not a number (NaN) | |
| 987 bool TypeD::is_nan() const { | |
| 988 return g_isnan(getd()) != 0; | |
| 989 } | |
| 990 | |
| 991 //------------------------------dump2------------------------------------------ | |
| 992 // Dump double constant Type | |
| 993 #ifndef PRODUCT | |
| 994 void TypeD::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 995 Type::dump2(d,depth,st); | |
| 996 st->print("%f", _d); | |
| 997 } | |
| 998 #endif | |
| 999 | |
| 1000 //------------------------------singleton-------------------------------------- | |
| 1001 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
| 1002 // constants (Ldi nodes). Singletons are integer, float or double constants | |
| 1003 // or a single symbol. | |
| 1004 bool TypeD::singleton(void) const { | |
| 1005 return true; // Always a singleton | |
| 1006 } | |
| 1007 | |
| 1008 bool TypeD::empty(void) const { | |
| 1009 return false; // always exactly a singleton | |
| 1010 } | |
| 1011 | |
| 1012 //============================================================================= | |
| 1013 // Convience common pre-built types. | |
| 1014 const TypeInt *TypeInt::MINUS_1;// -1 | |
| 1015 const TypeInt *TypeInt::ZERO; // 0 | |
| 1016 const TypeInt *TypeInt::ONE; // 1 | |
| 1017 const TypeInt *TypeInt::BOOL; // 0 or 1, FALSE or TRUE. | |
| 1018 const TypeInt *TypeInt::CC; // -1,0 or 1, condition codes | |
| 1019 const TypeInt *TypeInt::CC_LT; // [-1] == MINUS_1 | |
| 1020 const TypeInt *TypeInt::CC_GT; // [1] == ONE | |
| 1021 const TypeInt *TypeInt::CC_EQ; // [0] == ZERO | |
| 1022 const TypeInt *TypeInt::CC_LE; // [-1,0] | |
| 1023 const TypeInt *TypeInt::CC_GE; // [0,1] == BOOL (!) | |
| 1024 const TypeInt *TypeInt::BYTE; // Bytes, -128 to 127 | |
| 1025 const TypeInt *TypeInt::CHAR; // Java chars, 0-65535 | |
| 1026 const TypeInt *TypeInt::SHORT; // Java shorts, -32768-32767 | |
| 1027 const TypeInt *TypeInt::POS; // Positive 32-bit integers or zero | |
| 1028 const TypeInt *TypeInt::POS1; // Positive 32-bit integers | |
| 1029 const TypeInt *TypeInt::INT; // 32-bit integers | |
| 1030 const TypeInt *TypeInt::SYMINT; // symmetric range [-max_jint..max_jint] | |
| 1031 | |
| 1032 //------------------------------TypeInt---------------------------------------- | |
| 1033 TypeInt::TypeInt( jint lo, jint hi, int w ) : Type(Int), _lo(lo), _hi(hi), _widen(w) { | |
| 1034 } | |
| 1035 | |
| 1036 //------------------------------make------------------------------------------- | |
| 1037 const TypeInt *TypeInt::make( jint lo ) { | |
| 1038 return (TypeInt*)(new TypeInt(lo,lo,WidenMin))->hashcons(); | |
| 1039 } | |
| 1040 | |
| 1041 #define SMALLINT ((juint)3) // a value too insignificant to consider widening | |
| 1042 | |
| 1043 const TypeInt *TypeInt::make( jint lo, jint hi, int w ) { | |
| 1044 // Certain normalizations keep us sane when comparing types. | |
| 1045 // The 'SMALLINT' covers constants and also CC and its relatives. | |
| 1046 assert(CC == NULL || (juint)(CC->_hi - CC->_lo) <= SMALLINT, "CC is truly small"); | |
| 1047 if (lo <= hi) { | |
| 1048 if ((juint)(hi - lo) <= SMALLINT) w = Type::WidenMin; | |
| 1049 if ((juint)(hi - lo) >= max_juint) w = Type::WidenMax; // plain int | |
| 1050 } | |
| 1051 return (TypeInt*)(new TypeInt(lo,hi,w))->hashcons(); | |
| 1052 } | |
| 1053 | |
| 1054 //------------------------------meet------------------------------------------- | |
| 1055 // Compute the MEET of two types. It returns a new Type representation object | |
| 1056 // with reference count equal to the number of Types pointing at it. | |
| 1057 // Caller should wrap a Types around it. | |
| 1058 const Type *TypeInt::xmeet( const Type *t ) const { | |
| 1059 // Perform a fast test for common case; meeting the same types together. | |
| 1060 if( this == t ) return this; // Meeting same type? | |
| 1061 | |
| 1062 // Currently "this->_base" is a TypeInt | |
| 1063 switch (t->base()) { // Switch on original type | |
| 1064 case AnyPtr: // Mixing with oops happens when javac | |
| 1065 case RawPtr: // reuses local variables | |
| 1066 case OopPtr: | |
| 1067 case InstPtr: | |
| 1068 case KlassPtr: | |
| 1069 case AryPtr: | |
|
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1070 case NarrowOop: |
| 0 | 1071 case Long: |
| 1072 case FloatTop: | |
| 1073 case FloatCon: | |
| 1074 case FloatBot: | |
| 1075 case DoubleTop: | |
| 1076 case DoubleCon: | |
| 1077 case DoubleBot: | |
| 1078 case Bottom: // Ye Olde Default | |
| 1079 return Type::BOTTOM; | |
| 1080 default: // All else is a mistake | |
| 1081 typerr(t); | |
| 1082 case Top: // No change | |
| 1083 return this; | |
| 1084 case Int: // Int vs Int? | |
| 1085 break; | |
| 1086 } | |
| 1087 | |
| 1088 // Expand covered set | |
| 1089 const TypeInt *r = t->is_int(); | |
| 1090 // (Avoid TypeInt::make, to avoid the argument normalizations it enforces.) | |
| 1091 return (new TypeInt( MIN2(_lo,r->_lo), MAX2(_hi,r->_hi), MAX2(_widen,r->_widen) ))->hashcons(); | |
| 1092 } | |
| 1093 | |
| 1094 //------------------------------xdual------------------------------------------ | |
| 1095 // Dual: reverse hi & lo; flip widen | |
| 1096 const Type *TypeInt::xdual() const { | |
| 1097 return new TypeInt(_hi,_lo,WidenMax-_widen); | |
| 1098 } | |
| 1099 | |
| 1100 //------------------------------widen------------------------------------------ | |
| 1101 // Only happens for optimistic top-down optimizations. | |
| 1102 const Type *TypeInt::widen( const Type *old ) const { | |
| 1103 // Coming from TOP or such; no widening | |
| 1104 if( old->base() != Int ) return this; | |
| 1105 const TypeInt *ot = old->is_int(); | |
| 1106 | |
| 1107 // If new guy is equal to old guy, no widening | |
| 1108 if( _lo == ot->_lo && _hi == ot->_hi ) | |
| 1109 return old; | |
| 1110 | |
| 1111 // If new guy contains old, then we widened | |
| 1112 if( _lo <= ot->_lo && _hi >= ot->_hi ) { | |
| 1113 // New contains old | |
| 1114 // If new guy is already wider than old, no widening | |
| 1115 if( _widen > ot->_widen ) return this; | |
| 1116 // If old guy was a constant, do not bother | |
| 1117 if (ot->_lo == ot->_hi) return this; | |
| 1118 // Now widen new guy. | |
| 1119 // Check for widening too far | |
| 1120 if (_widen == WidenMax) { | |
| 1121 if (min_jint < _lo && _hi < max_jint) { | |
| 1122 // If neither endpoint is extremal yet, push out the endpoint | |
| 1123 // which is closer to its respective limit. | |
| 1124 if (_lo >= 0 || // easy common case | |
| 1125 (juint)(_lo - min_jint) >= (juint)(max_jint - _hi)) { | |
| 1126 // Try to widen to an unsigned range type of 31 bits: | |
| 1127 return make(_lo, max_jint, WidenMax); | |
| 1128 } else { | |
| 1129 return make(min_jint, _hi, WidenMax); | |
| 1130 } | |
| 1131 } | |
| 1132 return TypeInt::INT; | |
| 1133 } | |
| 1134 // Returned widened new guy | |
| 1135 return make(_lo,_hi,_widen+1); | |
| 1136 } | |
| 1137 | |
| 1138 // If old guy contains new, then we probably widened too far & dropped to | |
| 1139 // bottom. Return the wider fellow. | |
| 1140 if ( ot->_lo <= _lo && ot->_hi >= _hi ) | |
| 1141 return old; | |
| 1142 | |
| 1143 //fatal("Integer value range is not subset"); | |
| 1144 //return this; | |
| 1145 return TypeInt::INT; | |
| 1146 } | |
| 1147 | |
| 1148 //------------------------------narrow--------------------------------------- | |
| 1149 // Only happens for pessimistic optimizations. | |
| 1150 const Type *TypeInt::narrow( const Type *old ) const { | |
| 1151 if (_lo >= _hi) return this; // already narrow enough | |
| 1152 if (old == NULL) return this; | |
| 1153 const TypeInt* ot = old->isa_int(); | |
| 1154 if (ot == NULL) return this; | |
| 1155 jint olo = ot->_lo; | |
| 1156 jint ohi = ot->_hi; | |
| 1157 | |
| 1158 // If new guy is equal to old guy, no narrowing | |
| 1159 if (_lo == olo && _hi == ohi) return old; | |
| 1160 | |
| 1161 // If old guy was maximum range, allow the narrowing | |
| 1162 if (olo == min_jint && ohi == max_jint) return this; | |
| 1163 | |
| 1164 if (_lo < olo || _hi > ohi) | |
| 1165 return this; // doesn't narrow; pretty wierd | |
| 1166 | |
| 1167 // The new type narrows the old type, so look for a "death march". | |
| 1168 // See comments on PhaseTransform::saturate. | |
| 1169 juint nrange = _hi - _lo; | |
| 1170 juint orange = ohi - olo; | |
| 1171 if (nrange < max_juint - 1 && nrange > (orange >> 1) + (SMALLINT*2)) { | |
| 1172 // Use the new type only if the range shrinks a lot. | |
| 1173 // We do not want the optimizer computing 2^31 point by point. | |
| 1174 return old; | |
| 1175 } | |
| 1176 | |
| 1177 return this; | |
| 1178 } | |
| 1179 | |
| 1180 //-----------------------------filter------------------------------------------ | |
| 1181 const Type *TypeInt::filter( const Type *kills ) const { | |
| 1182 const TypeInt* ft = join(kills)->isa_int(); | |
| 1183 if (ft == NULL || ft->_lo > ft->_hi) | |
| 1184 return Type::TOP; // Canonical empty value | |
| 1185 if (ft->_widen < this->_widen) { | |
| 1186 // Do not allow the value of kill->_widen to affect the outcome. | |
| 1187 // The widen bits must be allowed to run freely through the graph. | |
| 1188 ft = TypeInt::make(ft->_lo, ft->_hi, this->_widen); | |
| 1189 } | |
| 1190 return ft; | |
| 1191 } | |
| 1192 | |
| 1193 //------------------------------eq--------------------------------------------- | |
| 1194 // Structural equality check for Type representations | |
| 1195 bool TypeInt::eq( const Type *t ) const { | |
| 1196 const TypeInt *r = t->is_int(); // Handy access | |
| 1197 return r->_lo == _lo && r->_hi == _hi && r->_widen == _widen; | |
| 1198 } | |
| 1199 | |
| 1200 //------------------------------hash------------------------------------------- | |
| 1201 // Type-specific hashing function. | |
| 1202 int TypeInt::hash(void) const { | |
| 1203 return _lo+_hi+_widen+(int)Type::Int; | |
| 1204 } | |
| 1205 | |
| 1206 //------------------------------is_finite-------------------------------------- | |
| 1207 // Has a finite value | |
| 1208 bool TypeInt::is_finite() const { | |
| 1209 return true; | |
| 1210 } | |
| 1211 | |
| 1212 //------------------------------dump2------------------------------------------ | |
| 1213 // Dump TypeInt | |
| 1214 #ifndef PRODUCT | |
| 1215 static const char* intname(char* buf, jint n) { | |
| 1216 if (n == min_jint) | |
| 1217 return "min"; | |
| 1218 else if (n < min_jint + 10000) | |
| 1219 sprintf(buf, "min+" INT32_FORMAT, n - min_jint); | |
| 1220 else if (n == max_jint) | |
| 1221 return "max"; | |
| 1222 else if (n > max_jint - 10000) | |
| 1223 sprintf(buf, "max-" INT32_FORMAT, max_jint - n); | |
| 1224 else | |
| 1225 sprintf(buf, INT32_FORMAT, n); | |
| 1226 return buf; | |
| 1227 } | |
| 1228 | |
| 1229 void TypeInt::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 1230 char buf[40], buf2[40]; | |
| 1231 if (_lo == min_jint && _hi == max_jint) | |
| 1232 st->print("int"); | |
| 1233 else if (is_con()) | |
| 1234 st->print("int:%s", intname(buf, get_con())); | |
| 1235 else if (_lo == BOOL->_lo && _hi == BOOL->_hi) | |
| 1236 st->print("bool"); | |
| 1237 else if (_lo == BYTE->_lo && _hi == BYTE->_hi) | |
| 1238 st->print("byte"); | |
| 1239 else if (_lo == CHAR->_lo && _hi == CHAR->_hi) | |
| 1240 st->print("char"); | |
| 1241 else if (_lo == SHORT->_lo && _hi == SHORT->_hi) | |
| 1242 st->print("short"); | |
| 1243 else if (_hi == max_jint) | |
| 1244 st->print("int:>=%s", intname(buf, _lo)); | |
| 1245 else if (_lo == min_jint) | |
| 1246 st->print("int:<=%s", intname(buf, _hi)); | |
| 1247 else | |
| 1248 st->print("int:%s..%s", intname(buf, _lo), intname(buf2, _hi)); | |
| 1249 | |
| 1250 if (_widen != 0 && this != TypeInt::INT) | |
| 1251 st->print(":%.*s", _widen, "wwww"); | |
| 1252 } | |
| 1253 #endif | |
| 1254 | |
| 1255 //------------------------------singleton-------------------------------------- | |
| 1256 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
| 1257 // constants. | |
| 1258 bool TypeInt::singleton(void) const { | |
| 1259 return _lo >= _hi; | |
| 1260 } | |
| 1261 | |
| 1262 bool TypeInt::empty(void) const { | |
| 1263 return _lo > _hi; | |
| 1264 } | |
| 1265 | |
| 1266 //============================================================================= | |
| 1267 // Convenience common pre-built types. | |
| 1268 const TypeLong *TypeLong::MINUS_1;// -1 | |
| 1269 const TypeLong *TypeLong::ZERO; // 0 | |
| 1270 const TypeLong *TypeLong::ONE; // 1 | |
| 1271 const TypeLong *TypeLong::POS; // >=0 | |
| 1272 const TypeLong *TypeLong::LONG; // 64-bit integers | |
| 1273 const TypeLong *TypeLong::INT; // 32-bit subrange | |
| 1274 const TypeLong *TypeLong::UINT; // 32-bit unsigned subrange | |
| 1275 | |
| 1276 //------------------------------TypeLong--------------------------------------- | |
| 1277 TypeLong::TypeLong( jlong lo, jlong hi, int w ) : Type(Long), _lo(lo), _hi(hi), _widen(w) { | |
| 1278 } | |
| 1279 | |
| 1280 //------------------------------make------------------------------------------- | |
| 1281 const TypeLong *TypeLong::make( jlong lo ) { | |
| 1282 return (TypeLong*)(new TypeLong(lo,lo,WidenMin))->hashcons(); | |
| 1283 } | |
| 1284 | |
| 1285 const TypeLong *TypeLong::make( jlong lo, jlong hi, int w ) { | |
| 1286 // Certain normalizations keep us sane when comparing types. | |
| 1287 // The '1' covers constants. | |
| 1288 if (lo <= hi) { | |
| 1289 if ((julong)(hi - lo) <= SMALLINT) w = Type::WidenMin; | |
| 1290 if ((julong)(hi - lo) >= max_julong) w = Type::WidenMax; // plain long | |
| 1291 } | |
| 1292 return (TypeLong*)(new TypeLong(lo,hi,w))->hashcons(); | |
| 1293 } | |
| 1294 | |
| 1295 | |
| 1296 //------------------------------meet------------------------------------------- | |
| 1297 // Compute the MEET of two types. It returns a new Type representation object | |
| 1298 // with reference count equal to the number of Types pointing at it. | |
| 1299 // Caller should wrap a Types around it. | |
| 1300 const Type *TypeLong::xmeet( const Type *t ) const { | |
| 1301 // Perform a fast test for common case; meeting the same types together. | |
| 1302 if( this == t ) return this; // Meeting same type? | |
| 1303 | |
| 1304 // Currently "this->_base" is a TypeLong | |
| 1305 switch (t->base()) { // Switch on original type | |
| 1306 case AnyPtr: // Mixing with oops happens when javac | |
| 1307 case RawPtr: // reuses local variables | |
| 1308 case OopPtr: | |
| 1309 case InstPtr: | |
| 1310 case KlassPtr: | |
| 1311 case AryPtr: | |
|
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1312 case NarrowOop: |
| 0 | 1313 case Int: |
| 1314 case FloatTop: | |
| 1315 case FloatCon: | |
| 1316 case FloatBot: | |
| 1317 case DoubleTop: | |
| 1318 case DoubleCon: | |
| 1319 case DoubleBot: | |
| 1320 case Bottom: // Ye Olde Default | |
| 1321 return Type::BOTTOM; | |
| 1322 default: // All else is a mistake | |
| 1323 typerr(t); | |
| 1324 case Top: // No change | |
| 1325 return this; | |
| 1326 case Long: // Long vs Long? | |
| 1327 break; | |
| 1328 } | |
| 1329 | |
| 1330 // Expand covered set | |
| 1331 const TypeLong *r = t->is_long(); // Turn into a TypeLong | |
| 1332 // (Avoid TypeLong::make, to avoid the argument normalizations it enforces.) | |
| 1333 return (new TypeLong( MIN2(_lo,r->_lo), MAX2(_hi,r->_hi), MAX2(_widen,r->_widen) ))->hashcons(); | |
| 1334 } | |
| 1335 | |
| 1336 //------------------------------xdual------------------------------------------ | |
| 1337 // Dual: reverse hi & lo; flip widen | |
| 1338 const Type *TypeLong::xdual() const { | |
| 1339 return new TypeLong(_hi,_lo,WidenMax-_widen); | |
| 1340 } | |
| 1341 | |
| 1342 //------------------------------widen------------------------------------------ | |
| 1343 // Only happens for optimistic top-down optimizations. | |
| 1344 const Type *TypeLong::widen( const Type *old ) const { | |
| 1345 // Coming from TOP or such; no widening | |
| 1346 if( old->base() != Long ) return this; | |
| 1347 const TypeLong *ot = old->is_long(); | |
| 1348 | |
| 1349 // If new guy is equal to old guy, no widening | |
| 1350 if( _lo == ot->_lo && _hi == ot->_hi ) | |
| 1351 return old; | |
| 1352 | |
| 1353 // If new guy contains old, then we widened | |
| 1354 if( _lo <= ot->_lo && _hi >= ot->_hi ) { | |
| 1355 // New contains old | |
| 1356 // If new guy is already wider than old, no widening | |
| 1357 if( _widen > ot->_widen ) return this; | |
| 1358 // If old guy was a constant, do not bother | |
| 1359 if (ot->_lo == ot->_hi) return this; | |
| 1360 // Now widen new guy. | |
| 1361 // Check for widening too far | |
| 1362 if (_widen == WidenMax) { | |
| 1363 if (min_jlong < _lo && _hi < max_jlong) { | |
| 1364 // If neither endpoint is extremal yet, push out the endpoint | |
| 1365 // which is closer to its respective limit. | |
| 1366 if (_lo >= 0 || // easy common case | |
| 1367 (julong)(_lo - min_jlong) >= (julong)(max_jlong - _hi)) { | |
| 1368 // Try to widen to an unsigned range type of 32/63 bits: | |
| 1369 if (_hi < max_juint) | |
| 1370 return make(_lo, max_juint, WidenMax); | |
| 1371 else | |
| 1372 return make(_lo, max_jlong, WidenMax); | |
| 1373 } else { | |
| 1374 return make(min_jlong, _hi, WidenMax); | |
| 1375 } | |
| 1376 } | |
| 1377 return TypeLong::LONG; | |
| 1378 } | |
| 1379 // Returned widened new guy | |
| 1380 return make(_lo,_hi,_widen+1); | |
| 1381 } | |
| 1382 | |
| 1383 // If old guy contains new, then we probably widened too far & dropped to | |
| 1384 // bottom. Return the wider fellow. | |
| 1385 if ( ot->_lo <= _lo && ot->_hi >= _hi ) | |
| 1386 return old; | |
| 1387 | |
| 1388 // fatal("Long value range is not subset"); | |
| 1389 // return this; | |
| 1390 return TypeLong::LONG; | |
| 1391 } | |
| 1392 | |
| 1393 //------------------------------narrow---------------------------------------- | |
| 1394 // Only happens for pessimistic optimizations. | |
| 1395 const Type *TypeLong::narrow( const Type *old ) const { | |
| 1396 if (_lo >= _hi) return this; // already narrow enough | |
| 1397 if (old == NULL) return this; | |
| 1398 const TypeLong* ot = old->isa_long(); | |
| 1399 if (ot == NULL) return this; | |
| 1400 jlong olo = ot->_lo; | |
| 1401 jlong ohi = ot->_hi; | |
| 1402 | |
| 1403 // If new guy is equal to old guy, no narrowing | |
| 1404 if (_lo == olo && _hi == ohi) return old; | |
| 1405 | |
| 1406 // If old guy was maximum range, allow the narrowing | |
| 1407 if (olo == min_jlong && ohi == max_jlong) return this; | |
| 1408 | |
| 1409 if (_lo < olo || _hi > ohi) | |
| 1410 return this; // doesn't narrow; pretty wierd | |
| 1411 | |
| 1412 // The new type narrows the old type, so look for a "death march". | |
| 1413 // See comments on PhaseTransform::saturate. | |
| 1414 julong nrange = _hi - _lo; | |
| 1415 julong orange = ohi - olo; | |
| 1416 if (nrange < max_julong - 1 && nrange > (orange >> 1) + (SMALLINT*2)) { | |
| 1417 // Use the new type only if the range shrinks a lot. | |
| 1418 // We do not want the optimizer computing 2^31 point by point. | |
| 1419 return old; | |
| 1420 } | |
| 1421 | |
| 1422 return this; | |
| 1423 } | |
| 1424 | |
| 1425 //-----------------------------filter------------------------------------------ | |
| 1426 const Type *TypeLong::filter( const Type *kills ) const { | |
| 1427 const TypeLong* ft = join(kills)->isa_long(); | |
| 1428 if (ft == NULL || ft->_lo > ft->_hi) | |
| 1429 return Type::TOP; // Canonical empty value | |
| 1430 if (ft->_widen < this->_widen) { | |
| 1431 // Do not allow the value of kill->_widen to affect the outcome. | |
| 1432 // The widen bits must be allowed to run freely through the graph. | |
| 1433 ft = TypeLong::make(ft->_lo, ft->_hi, this->_widen); | |
| 1434 } | |
| 1435 return ft; | |
| 1436 } | |
| 1437 | |
| 1438 //------------------------------eq--------------------------------------------- | |
| 1439 // Structural equality check for Type representations | |
| 1440 bool TypeLong::eq( const Type *t ) const { | |
| 1441 const TypeLong *r = t->is_long(); // Handy access | |
| 1442 return r->_lo == _lo && r->_hi == _hi && r->_widen == _widen; | |
| 1443 } | |
| 1444 | |
| 1445 //------------------------------hash------------------------------------------- | |
| 1446 // Type-specific hashing function. | |
| 1447 int TypeLong::hash(void) const { | |
| 1448 return (int)(_lo+_hi+_widen+(int)Type::Long); | |
| 1449 } | |
| 1450 | |
| 1451 //------------------------------is_finite-------------------------------------- | |
| 1452 // Has a finite value | |
| 1453 bool TypeLong::is_finite() const { | |
| 1454 return true; | |
| 1455 } | |
| 1456 | |
| 1457 //------------------------------dump2------------------------------------------ | |
| 1458 // Dump TypeLong | |
| 1459 #ifndef PRODUCT | |
| 1460 static const char* longnamenear(jlong x, const char* xname, char* buf, jlong n) { | |
| 1461 if (n > x) { | |
| 1462 if (n >= x + 10000) return NULL; | |
| 1463 sprintf(buf, "%s+" INT64_FORMAT, xname, n - x); | |
| 1464 } else if (n < x) { | |
| 1465 if (n <= x - 10000) return NULL; | |
| 1466 sprintf(buf, "%s-" INT64_FORMAT, xname, x - n); | |
| 1467 } else { | |
| 1468 return xname; | |
| 1469 } | |
| 1470 return buf; | |
| 1471 } | |
| 1472 | |
| 1473 static const char* longname(char* buf, jlong n) { | |
| 1474 const char* str; | |
| 1475 if (n == min_jlong) | |
| 1476 return "min"; | |
| 1477 else if (n < min_jlong + 10000) | |
| 1478 sprintf(buf, "min+" INT64_FORMAT, n - min_jlong); | |
| 1479 else if (n == max_jlong) | |
| 1480 return "max"; | |
| 1481 else if (n > max_jlong - 10000) | |
| 1482 sprintf(buf, "max-" INT64_FORMAT, max_jlong - n); | |
| 1483 else if ((str = longnamenear(max_juint, "maxuint", buf, n)) != NULL) | |
| 1484 return str; | |
| 1485 else if ((str = longnamenear(max_jint, "maxint", buf, n)) != NULL) | |
| 1486 return str; | |
| 1487 else if ((str = longnamenear(min_jint, "minint", buf, n)) != NULL) | |
| 1488 return str; | |
| 1489 else | |
| 1490 sprintf(buf, INT64_FORMAT, n); | |
| 1491 return buf; | |
| 1492 } | |
| 1493 | |
| 1494 void TypeLong::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 1495 char buf[80], buf2[80]; | |
| 1496 if (_lo == min_jlong && _hi == max_jlong) | |
| 1497 st->print("long"); | |
| 1498 else if (is_con()) | |
| 1499 st->print("long:%s", longname(buf, get_con())); | |
| 1500 else if (_hi == max_jlong) | |
| 1501 st->print("long:>=%s", longname(buf, _lo)); | |
| 1502 else if (_lo == min_jlong) | |
| 1503 st->print("long:<=%s", longname(buf, _hi)); | |
| 1504 else | |
| 1505 st->print("long:%s..%s", longname(buf, _lo), longname(buf2, _hi)); | |
| 1506 | |
| 1507 if (_widen != 0 && this != TypeLong::LONG) | |
| 1508 st->print(":%.*s", _widen, "wwww"); | |
| 1509 } | |
| 1510 #endif | |
| 1511 | |
| 1512 //------------------------------singleton-------------------------------------- | |
| 1513 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
| 1514 // constants | |
| 1515 bool TypeLong::singleton(void) const { | |
| 1516 return _lo >= _hi; | |
| 1517 } | |
| 1518 | |
| 1519 bool TypeLong::empty(void) const { | |
| 1520 return _lo > _hi; | |
| 1521 } | |
| 1522 | |
| 1523 //============================================================================= | |
| 1524 // Convenience common pre-built types. | |
| 1525 const TypeTuple *TypeTuple::IFBOTH; // Return both arms of IF as reachable | |
| 1526 const TypeTuple *TypeTuple::IFFALSE; | |
| 1527 const TypeTuple *TypeTuple::IFTRUE; | |
| 1528 const TypeTuple *TypeTuple::IFNEITHER; | |
| 1529 const TypeTuple *TypeTuple::LOOPBODY; | |
| 1530 const TypeTuple *TypeTuple::MEMBAR; | |
| 1531 const TypeTuple *TypeTuple::STORECONDITIONAL; | |
| 1532 const TypeTuple *TypeTuple::START_I2C; | |
| 1533 const TypeTuple *TypeTuple::INT_PAIR; | |
| 1534 const TypeTuple *TypeTuple::LONG_PAIR; | |
| 1535 | |
| 1536 | |
| 1537 //------------------------------make------------------------------------------- | |
| 1538 // Make a TypeTuple from the range of a method signature | |
| 1539 const TypeTuple *TypeTuple::make_range(ciSignature* sig) { | |
| 1540 ciType* return_type = sig->return_type(); | |
| 1541 uint total_fields = TypeFunc::Parms + return_type->size(); | |
| 1542 const Type **field_array = fields(total_fields); | |
| 1543 switch (return_type->basic_type()) { | |
| 1544 case T_LONG: | |
| 1545 field_array[TypeFunc::Parms] = TypeLong::LONG; | |
| 1546 field_array[TypeFunc::Parms+1] = Type::HALF; | |
| 1547 break; | |
| 1548 case T_DOUBLE: | |
| 1549 field_array[TypeFunc::Parms] = Type::DOUBLE; | |
| 1550 field_array[TypeFunc::Parms+1] = Type::HALF; | |
| 1551 break; | |
| 1552 case T_OBJECT: | |
| 1553 case T_ARRAY: | |
| 1554 case T_BOOLEAN: | |
| 1555 case T_CHAR: | |
| 1556 case T_FLOAT: | |
| 1557 case T_BYTE: | |
| 1558 case T_SHORT: | |
| 1559 case T_INT: | |
| 1560 field_array[TypeFunc::Parms] = get_const_type(return_type); | |
| 1561 break; | |
| 1562 case T_VOID: | |
| 1563 break; | |
| 1564 default: | |
| 1565 ShouldNotReachHere(); | |
| 1566 } | |
| 1567 return (TypeTuple*)(new TypeTuple(total_fields,field_array))->hashcons(); | |
| 1568 } | |
| 1569 | |
| 1570 // Make a TypeTuple from the domain of a method signature | |
| 1571 const TypeTuple *TypeTuple::make_domain(ciInstanceKlass* recv, ciSignature* sig) { | |
| 1572 uint total_fields = TypeFunc::Parms + sig->size(); | |
| 1573 | |
| 1574 uint pos = TypeFunc::Parms; | |
| 1575 const Type **field_array; | |
| 1576 if (recv != NULL) { | |
| 1577 total_fields++; | |
| 1578 field_array = fields(total_fields); | |
| 1579 // Use get_const_type here because it respects UseUniqueSubclasses: | |
| 1580 field_array[pos++] = get_const_type(recv)->join(TypePtr::NOTNULL); | |
| 1581 } else { | |
| 1582 field_array = fields(total_fields); | |
| 1583 } | |
| 1584 | |
| 1585 int i = 0; | |
| 1586 while (pos < total_fields) { | |
| 1587 ciType* type = sig->type_at(i); | |
| 1588 | |
| 1589 switch (type->basic_type()) { | |
| 1590 case T_LONG: | |
| 1591 field_array[pos++] = TypeLong::LONG; | |
| 1592 field_array[pos++] = Type::HALF; | |
| 1593 break; | |
| 1594 case T_DOUBLE: | |
| 1595 field_array[pos++] = Type::DOUBLE; | |
| 1596 field_array[pos++] = Type::HALF; | |
| 1597 break; | |
| 1598 case T_OBJECT: | |
| 1599 case T_ARRAY: | |
| 1600 case T_BOOLEAN: | |
| 1601 case T_CHAR: | |
| 1602 case T_FLOAT: | |
| 1603 case T_BYTE: | |
| 1604 case T_SHORT: | |
| 1605 case T_INT: | |
| 1606 field_array[pos++] = get_const_type(type); | |
| 1607 break; | |
| 1608 default: | |
| 1609 ShouldNotReachHere(); | |
| 1610 } | |
| 1611 i++; | |
| 1612 } | |
| 1613 return (TypeTuple*)(new TypeTuple(total_fields,field_array))->hashcons(); | |
| 1614 } | |
| 1615 | |
| 1616 const TypeTuple *TypeTuple::make( uint cnt, const Type **fields ) { | |
| 1617 return (TypeTuple*)(new TypeTuple(cnt,fields))->hashcons(); | |
| 1618 } | |
| 1619 | |
| 1620 //------------------------------fields----------------------------------------- | |
| 1621 // Subroutine call type with space allocated for argument types | |
| 1622 const Type **TypeTuple::fields( uint arg_cnt ) { | |
| 1623 const Type **flds = (const Type **)(Compile::current()->type_arena()->Amalloc_4((TypeFunc::Parms+arg_cnt)*sizeof(Type*) )); | |
| 1624 flds[TypeFunc::Control ] = Type::CONTROL; | |
| 1625 flds[TypeFunc::I_O ] = Type::ABIO; | |
| 1626 flds[TypeFunc::Memory ] = Type::MEMORY; | |
| 1627 flds[TypeFunc::FramePtr ] = TypeRawPtr::BOTTOM; | |
| 1628 flds[TypeFunc::ReturnAdr] = Type::RETURN_ADDRESS; | |
| 1629 | |
| 1630 return flds; | |
| 1631 } | |
| 1632 | |
| 1633 //------------------------------meet------------------------------------------- | |
| 1634 // Compute the MEET of two types. It returns a new Type object. | |
| 1635 const Type *TypeTuple::xmeet( const Type *t ) const { | |
| 1636 // Perform a fast test for common case; meeting the same types together. | |
| 1637 if( this == t ) return this; // Meeting same type-rep? | |
| 1638 | |
| 1639 // Current "this->_base" is Tuple | |
| 1640 switch (t->base()) { // switch on original type | |
| 1641 | |
| 1642 case Bottom: // Ye Olde Default | |
| 1643 return t; | |
| 1644 | |
| 1645 default: // All else is a mistake | |
| 1646 typerr(t); | |
| 1647 | |
| 1648 case Tuple: { // Meeting 2 signatures? | |
| 1649 const TypeTuple *x = t->is_tuple(); | |
| 1650 assert( _cnt == x->_cnt, "" ); | |
| 1651 const Type **fields = (const Type **)(Compile::current()->type_arena()->Amalloc_4( _cnt*sizeof(Type*) )); | |
| 1652 for( uint i=0; i<_cnt; i++ ) | |
| 1653 fields[i] = field_at(i)->xmeet( x->field_at(i) ); | |
| 1654 return TypeTuple::make(_cnt,fields); | |
| 1655 } | |
| 1656 case Top: | |
| 1657 break; | |
| 1658 } | |
| 1659 return this; // Return the double constant | |
| 1660 } | |
| 1661 | |
| 1662 //------------------------------xdual------------------------------------------ | |
| 1663 // Dual: compute field-by-field dual | |
| 1664 const Type *TypeTuple::xdual() const { | |
| 1665 const Type **fields = (const Type **)(Compile::current()->type_arena()->Amalloc_4( _cnt*sizeof(Type*) )); | |
| 1666 for( uint i=0; i<_cnt; i++ ) | |
| 1667 fields[i] = _fields[i]->dual(); | |
| 1668 return new TypeTuple(_cnt,fields); | |
| 1669 } | |
| 1670 | |
| 1671 //------------------------------eq--------------------------------------------- | |
| 1672 // Structural equality check for Type representations | |
| 1673 bool TypeTuple::eq( const Type *t ) const { | |
| 1674 const TypeTuple *s = (const TypeTuple *)t; | |
| 1675 if (_cnt != s->_cnt) return false; // Unequal field counts | |
| 1676 for (uint i = 0; i < _cnt; i++) | |
| 1677 if (field_at(i) != s->field_at(i)) // POINTER COMPARE! NO RECURSION! | |
| 1678 return false; // Missed | |
| 1679 return true; | |
| 1680 } | |
| 1681 | |
| 1682 //------------------------------hash------------------------------------------- | |
| 1683 // Type-specific hashing function. | |
| 1684 int TypeTuple::hash(void) const { | |
| 1685 intptr_t sum = _cnt; | |
| 1686 for( uint i=0; i<_cnt; i++ ) | |
| 1687 sum += (intptr_t)_fields[i]; // Hash on pointers directly | |
| 1688 return sum; | |
| 1689 } | |
| 1690 | |
| 1691 //------------------------------dump2------------------------------------------ | |
| 1692 // Dump signature Type | |
| 1693 #ifndef PRODUCT | |
| 1694 void TypeTuple::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 1695 st->print("{"); | |
| 1696 if( !depth || d[this] ) { // Check for recursive print | |
| 1697 st->print("...}"); | |
| 1698 return; | |
| 1699 } | |
| 1700 d.Insert((void*)this, (void*)this); // Stop recursion | |
| 1701 if( _cnt ) { | |
| 1702 uint i; | |
| 1703 for( i=0; i<_cnt-1; i++ ) { | |
| 1704 st->print("%d:", i); | |
| 1705 _fields[i]->dump2(d, depth-1, st); | |
| 1706 st->print(", "); | |
| 1707 } | |
| 1708 st->print("%d:", i); | |
| 1709 _fields[i]->dump2(d, depth-1, st); | |
| 1710 } | |
| 1711 st->print("}"); | |
| 1712 } | |
| 1713 #endif | |
| 1714 | |
| 1715 //------------------------------singleton-------------------------------------- | |
| 1716 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
| 1717 // constants (Ldi nodes). Singletons are integer, float or double constants | |
| 1718 // or a single symbol. | |
| 1719 bool TypeTuple::singleton(void) const { | |
| 1720 return false; // Never a singleton | |
| 1721 } | |
| 1722 | |
| 1723 bool TypeTuple::empty(void) const { | |
| 1724 for( uint i=0; i<_cnt; i++ ) { | |
| 1725 if (_fields[i]->empty()) return true; | |
| 1726 } | |
| 1727 return false; | |
| 1728 } | |
| 1729 | |
| 1730 //============================================================================= | |
| 1731 // Convenience common pre-built types. | |
| 1732 | |
| 1733 inline const TypeInt* normalize_array_size(const TypeInt* size) { | |
| 1734 // Certain normalizations keep us sane when comparing types. | |
| 1735 // We do not want arrayOop variables to differ only by the wideness | |
| 1736 // of their index types. Pick minimum wideness, since that is the | |
| 1737 // forced wideness of small ranges anyway. | |
| 1738 if (size->_widen != Type::WidenMin) | |
| 1739 return TypeInt::make(size->_lo, size->_hi, Type::WidenMin); | |
| 1740 else | |
| 1741 return size; | |
| 1742 } | |
| 1743 | |
| 1744 //------------------------------make------------------------------------------- | |
| 1745 const TypeAry *TypeAry::make( const Type *elem, const TypeInt *size) { | |
|
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1746 if (UseCompressedOops && elem->isa_oopptr()) { |
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1747 elem = elem->make_narrowoop(); |
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1748 } |
| 0 | 1749 size = normalize_array_size(size); |
| 1750 return (TypeAry*)(new TypeAry(elem,size))->hashcons(); | |
| 1751 } | |
| 1752 | |
| 1753 //------------------------------meet------------------------------------------- | |
| 1754 // Compute the MEET of two types. It returns a new Type object. | |
| 1755 const Type *TypeAry::xmeet( const Type *t ) const { | |
| 1756 // Perform a fast test for common case; meeting the same types together. | |
| 1757 if( this == t ) return this; // Meeting same type-rep? | |
| 1758 | |
| 1759 // Current "this->_base" is Ary | |
| 1760 switch (t->base()) { // switch on original type | |
| 1761 | |
| 1762 case Bottom: // Ye Olde Default | |
| 1763 return t; | |
| 1764 | |
| 1765 default: // All else is a mistake | |
| 1766 typerr(t); | |
| 1767 | |
| 1768 case Array: { // Meeting 2 arrays? | |
| 1769 const TypeAry *a = t->is_ary(); | |
| 1770 return TypeAry::make(_elem->meet(a->_elem), | |
| 1771 _size->xmeet(a->_size)->is_int()); | |
| 1772 } | |
| 1773 case Top: | |
| 1774 break; | |
| 1775 } | |
| 1776 return this; // Return the double constant | |
| 1777 } | |
| 1778 | |
| 1779 //------------------------------xdual------------------------------------------ | |
| 1780 // Dual: compute field-by-field dual | |
| 1781 const Type *TypeAry::xdual() const { | |
| 1782 const TypeInt* size_dual = _size->dual()->is_int(); | |
| 1783 size_dual = normalize_array_size(size_dual); | |
| 1784 return new TypeAry( _elem->dual(), size_dual); | |
| 1785 } | |
| 1786 | |
| 1787 //------------------------------eq--------------------------------------------- | |
| 1788 // Structural equality check for Type representations | |
| 1789 bool TypeAry::eq( const Type *t ) const { | |
| 1790 const TypeAry *a = (const TypeAry*)t; | |
| 1791 return _elem == a->_elem && | |
| 1792 _size == a->_size; | |
| 1793 } | |
| 1794 | |
| 1795 //------------------------------hash------------------------------------------- | |
| 1796 // Type-specific hashing function. | |
| 1797 int TypeAry::hash(void) const { | |
| 1798 return (intptr_t)_elem + (intptr_t)_size; | |
| 1799 } | |
| 1800 | |
| 1801 //------------------------------dump2------------------------------------------ | |
| 1802 #ifndef PRODUCT | |
| 1803 void TypeAry::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 1804 _elem->dump2(d, depth, st); | |
| 1805 st->print("["); | |
| 1806 _size->dump2(d, depth, st); | |
| 1807 st->print("]"); | |
| 1808 } | |
| 1809 #endif | |
| 1810 | |
| 1811 //------------------------------singleton-------------------------------------- | |
| 1812 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
| 1813 // constants (Ldi nodes). Singletons are integer, float or double constants | |
| 1814 // or a single symbol. | |
| 1815 bool TypeAry::singleton(void) const { | |
| 1816 return false; // Never a singleton | |
| 1817 } | |
| 1818 | |
| 1819 bool TypeAry::empty(void) const { | |
| 1820 return _elem->empty() || _size->empty(); | |
| 1821 } | |
| 1822 | |
| 1823 //--------------------------ary_must_be_exact---------------------------------- | |
| 1824 bool TypeAry::ary_must_be_exact() const { | |
| 1825 if (!UseExactTypes) return false; | |
| 1826 // This logic looks at the element type of an array, and returns true | |
| 1827 // if the element type is either a primitive or a final instance class. | |
| 1828 // In such cases, an array built on this ary must have no subclasses. | |
| 1829 if (_elem == BOTTOM) return false; // general array not exact | |
| 1830 if (_elem == TOP ) return false; // inverted general array not exact | |
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1831 const TypeOopPtr* toop = NULL; |
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1832 if (UseCompressedOops && _elem->isa_narrowoop()) { |
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1833 toop = _elem->make_ptr()->isa_oopptr(); |
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1834 } else { |
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1835 toop = _elem->isa_oopptr(); |
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1836 } |
| 0 | 1837 if (!toop) return true; // a primitive type, like int |
| 1838 ciKlass* tklass = toop->klass(); | |
| 1839 if (tklass == NULL) return false; // unloaded class | |
| 1840 if (!tklass->is_loaded()) return false; // unloaded class | |
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1841 const TypeInstPtr* tinst; |
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1842 if (_elem->isa_narrowoop()) |
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1843 tinst = _elem->make_ptr()->isa_instptr(); |
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1844 else |
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1845 tinst = _elem->isa_instptr(); |
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1846 if (tinst) |
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1847 return tklass->as_instance_klass()->is_final(); |
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1848 const TypeAryPtr* tap; |
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1849 if (_elem->isa_narrowoop()) |
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1850 tap = _elem->make_ptr()->isa_aryptr(); |
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1851 else |
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1852 tap = _elem->isa_aryptr(); |
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1853 if (tap) |
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1854 return tap->ary()->ary_must_be_exact(); |
| 0 | 1855 return false; |
| 1856 } | |
| 1857 | |
| 1858 //============================================================================= | |
| 1859 // Convenience common pre-built types. | |
| 1860 const TypePtr *TypePtr::NULL_PTR; | |
| 1861 const TypePtr *TypePtr::NOTNULL; | |
| 1862 const TypePtr *TypePtr::BOTTOM; | |
| 1863 | |
| 1864 //------------------------------meet------------------------------------------- | |
| 1865 // Meet over the PTR enum | |
| 1866 const TypePtr::PTR TypePtr::ptr_meet[TypePtr::lastPTR][TypePtr::lastPTR] = { | |
| 1867 // TopPTR, AnyNull, Constant, Null, NotNull, BotPTR, | |
| 1868 { /* Top */ TopPTR, AnyNull, Constant, Null, NotNull, BotPTR,}, | |
| 1869 { /* AnyNull */ AnyNull, AnyNull, Constant, BotPTR, NotNull, BotPTR,}, | |
| 1870 { /* Constant*/ Constant, Constant, Constant, BotPTR, NotNull, BotPTR,}, | |
| 1871 { /* Null */ Null, BotPTR, BotPTR, Null, BotPTR, BotPTR,}, | |
| 1872 { /* NotNull */ NotNull, NotNull, NotNull, BotPTR, NotNull, BotPTR,}, | |
| 1873 { /* BotPTR */ BotPTR, BotPTR, BotPTR, BotPTR, BotPTR, BotPTR,} | |
| 1874 }; | |
| 1875 | |
| 1876 //------------------------------make------------------------------------------- | |
| 1877 const TypePtr *TypePtr::make( TYPES t, enum PTR ptr, int offset ) { | |
| 1878 return (TypePtr*)(new TypePtr(t,ptr,offset))->hashcons(); | |
| 1879 } | |
| 1880 | |
| 1881 //------------------------------cast_to_ptr_type------------------------------- | |
| 1882 const Type *TypePtr::cast_to_ptr_type(PTR ptr) const { | |
| 1883 assert(_base == AnyPtr, "subclass must override cast_to_ptr_type"); | |
| 1884 if( ptr == _ptr ) return this; | |
| 1885 return make(_base, ptr, _offset); | |
| 1886 } | |
| 1887 | |
| 1888 //------------------------------get_con---------------------------------------- | |
| 1889 intptr_t TypePtr::get_con() const { | |
| 1890 assert( _ptr == Null, "" ); | |
| 1891 return _offset; | |
| 1892 } | |
| 1893 | |
| 1894 //------------------------------meet------------------------------------------- | |
| 1895 // Compute the MEET of two types. It returns a new Type object. | |
| 1896 const Type *TypePtr::xmeet( const Type *t ) const { | |
| 1897 // Perform a fast test for common case; meeting the same types together. | |
| 1898 if( this == t ) return this; // Meeting same type-rep? | |
| 1899 | |
| 1900 // Current "this->_base" is AnyPtr | |
| 1901 switch (t->base()) { // switch on original type | |
| 1902 case Int: // Mixing ints & oops happens when javac | |
| 1903 case Long: // reuses local variables | |
| 1904 case FloatTop: | |
| 1905 case FloatCon: | |
| 1906 case FloatBot: | |
| 1907 case DoubleTop: | |
| 1908 case DoubleCon: | |
| 1909 case DoubleBot: | |
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1910 case NarrowOop: |
| 0 | 1911 case Bottom: // Ye Olde Default |
| 1912 return Type::BOTTOM; | |
| 1913 case Top: | |
| 1914 return this; | |
| 1915 | |
| 1916 case AnyPtr: { // Meeting to AnyPtrs | |
| 1917 const TypePtr *tp = t->is_ptr(); | |
| 1918 return make( AnyPtr, meet_ptr(tp->ptr()), meet_offset(tp->offset()) ); | |
| 1919 } | |
| 1920 case RawPtr: // For these, flip the call around to cut down | |
| 1921 case OopPtr: | |
| 1922 case InstPtr: // on the cases I have to handle. | |
| 1923 case KlassPtr: | |
| 1924 case AryPtr: | |
| 1925 return t->xmeet(this); // Call in reverse direction | |
| 1926 default: // All else is a mistake | |
| 1927 typerr(t); | |
| 1928 | |
| 1929 } | |
| 1930 return this; | |
| 1931 } | |
| 1932 | |
| 1933 //------------------------------meet_offset------------------------------------ | |
| 1934 int TypePtr::meet_offset( int offset ) const { | |
| 1935 // Either is 'TOP' offset? Return the other offset! | |
| 1936 if( _offset == OffsetTop ) return offset; | |
| 1937 if( offset == OffsetTop ) return _offset; | |
| 1938 // If either is different, return 'BOTTOM' offset | |
| 1939 if( _offset != offset ) return OffsetBot; | |
| 1940 return _offset; | |
| 1941 } | |
| 1942 | |
| 1943 //------------------------------dual_offset------------------------------------ | |
| 1944 int TypePtr::dual_offset( ) const { | |
| 1945 if( _offset == OffsetTop ) return OffsetBot;// Map 'TOP' into 'BOTTOM' | |
| 1946 if( _offset == OffsetBot ) return OffsetTop;// Map 'BOTTOM' into 'TOP' | |
| 1947 return _offset; // Map everything else into self | |
| 1948 } | |
| 1949 | |
| 1950 //------------------------------xdual------------------------------------------ | |
| 1951 // Dual: compute field-by-field dual | |
| 1952 const TypePtr::PTR TypePtr::ptr_dual[TypePtr::lastPTR] = { | |
| 1953 BotPTR, NotNull, Constant, Null, AnyNull, TopPTR | |
| 1954 }; | |
| 1955 const Type *TypePtr::xdual() const { | |
| 1956 return new TypePtr( AnyPtr, dual_ptr(), dual_offset() ); | |
| 1957 } | |
| 1958 | |
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1959 //------------------------------xadd_offset------------------------------------ |
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1960 int TypePtr::xadd_offset( intptr_t offset ) const { |
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1961 // Adding to 'TOP' offset? Return 'TOP'! |
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1962 if( _offset == OffsetTop || offset == OffsetTop ) return OffsetTop; |
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1963 // Adding to 'BOTTOM' offset? Return 'BOTTOM'! |
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1964 if( _offset == OffsetBot || offset == OffsetBot ) return OffsetBot; |
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1965 // Addition overflows or "accidentally" equals to OffsetTop? Return 'BOTTOM'! |
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1966 offset += (intptr_t)_offset; |
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1967 if (offset != (int)offset || offset == OffsetTop) return OffsetBot; |
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1968 |
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1969 // assert( _offset >= 0 && _offset+offset >= 0, "" ); |
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1970 // It is possible to construct a negative offset during PhaseCCP |
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1971 |
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1972 return (int)offset; // Sum valid offsets |
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1973 } |
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1974 |
| 0 | 1975 //------------------------------add_offset------------------------------------- |
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1976 const TypePtr *TypePtr::add_offset( intptr_t offset ) const { |
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1977 return make( AnyPtr, _ptr, xadd_offset(offset) ); |
| 0 | 1978 } |
| 1979 | |
| 1980 //------------------------------eq--------------------------------------------- | |
| 1981 // Structural equality check for Type representations | |
| 1982 bool TypePtr::eq( const Type *t ) const { | |
| 1983 const TypePtr *a = (const TypePtr*)t; | |
| 1984 return _ptr == a->ptr() && _offset == a->offset(); | |
| 1985 } | |
| 1986 | |
| 1987 //------------------------------hash------------------------------------------- | |
| 1988 // Type-specific hashing function. | |
| 1989 int TypePtr::hash(void) const { | |
| 1990 return _ptr + _offset; | |
| 1991 } | |
| 1992 | |
| 1993 //------------------------------dump2------------------------------------------ | |
| 1994 const char *const TypePtr::ptr_msg[TypePtr::lastPTR] = { | |
| 1995 "TopPTR","AnyNull","Constant","NULL","NotNull","BotPTR" | |
| 1996 }; | |
| 1997 | |
| 1998 #ifndef PRODUCT | |
| 1999 void TypePtr::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 2000 if( _ptr == Null ) st->print("NULL"); | |
| 2001 else st->print("%s *", ptr_msg[_ptr]); | |
| 2002 if( _offset == OffsetTop ) st->print("+top"); | |
| 2003 else if( _offset == OffsetBot ) st->print("+bot"); | |
| 2004 else if( _offset ) st->print("+%d", _offset); | |
| 2005 } | |
| 2006 #endif | |
| 2007 | |
| 2008 //------------------------------singleton-------------------------------------- | |
| 2009 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
| 2010 // constants | |
| 2011 bool TypePtr::singleton(void) const { | |
| 2012 // TopPTR, Null, AnyNull, Constant are all singletons | |
| 2013 return (_offset != OffsetBot) && !below_centerline(_ptr); | |
| 2014 } | |
| 2015 | |
| 2016 bool TypePtr::empty(void) const { | |
| 2017 return (_offset == OffsetTop) || above_centerline(_ptr); | |
| 2018 } | |
| 2019 | |
| 2020 //============================================================================= | |
| 2021 // Convenience common pre-built types. | |
| 2022 const TypeRawPtr *TypeRawPtr::BOTTOM; | |
| 2023 const TypeRawPtr *TypeRawPtr::NOTNULL; | |
| 2024 | |
| 2025 //------------------------------make------------------------------------------- | |
| 2026 const TypeRawPtr *TypeRawPtr::make( enum PTR ptr ) { | |
| 2027 assert( ptr != Constant, "what is the constant?" ); | |
| 2028 assert( ptr != Null, "Use TypePtr for NULL" ); | |
| 2029 return (TypeRawPtr*)(new TypeRawPtr(ptr,0))->hashcons(); | |
| 2030 } | |
| 2031 | |
| 2032 const TypeRawPtr *TypeRawPtr::make( address bits ) { | |
| 2033 assert( bits, "Use TypePtr for NULL" ); | |
| 2034 return (TypeRawPtr*)(new TypeRawPtr(Constant,bits))->hashcons(); | |
| 2035 } | |
| 2036 | |
| 2037 //------------------------------cast_to_ptr_type------------------------------- | |
| 2038 const Type *TypeRawPtr::cast_to_ptr_type(PTR ptr) const { | |
| 2039 assert( ptr != Constant, "what is the constant?" ); | |
| 2040 assert( ptr != Null, "Use TypePtr for NULL" ); | |
| 2041 assert( _bits==0, "Why cast a constant address?"); | |
| 2042 if( ptr == _ptr ) return this; | |
| 2043 return make(ptr); | |
| 2044 } | |
| 2045 | |
| 2046 //------------------------------get_con---------------------------------------- | |
| 2047 intptr_t TypeRawPtr::get_con() const { | |
| 2048 assert( _ptr == Null || _ptr == Constant, "" ); | |
| 2049 return (intptr_t)_bits; | |
| 2050 } | |
| 2051 | |
| 2052 //------------------------------meet------------------------------------------- | |
| 2053 // Compute the MEET of two types. It returns a new Type object. | |
| 2054 const Type *TypeRawPtr::xmeet( const Type *t ) const { | |
| 2055 // Perform a fast test for common case; meeting the same types together. | |
| 2056 if( this == t ) return this; // Meeting same type-rep? | |
| 2057 | |
| 2058 // Current "this->_base" is RawPtr | |
| 2059 switch( t->base() ) { // switch on original type | |
| 2060 case Bottom: // Ye Olde Default | |
| 2061 return t; | |
| 2062 case Top: | |
| 2063 return this; | |
| 2064 case AnyPtr: // Meeting to AnyPtrs | |
| 2065 break; | |
| 2066 case RawPtr: { // might be top, bot, any/not or constant | |
| 2067 enum PTR tptr = t->is_ptr()->ptr(); | |
| 2068 enum PTR ptr = meet_ptr( tptr ); | |
| 2069 if( ptr == Constant ) { // Cannot be equal constants, so... | |
| 2070 if( tptr == Constant && _ptr != Constant) return t; | |
| 2071 if( _ptr == Constant && tptr != Constant) return this; | |
| 2072 ptr = NotNull; // Fall down in lattice | |
| 2073 } | |
| 2074 return make( ptr ); | |
| 2075 } | |
| 2076 | |
| 2077 case OopPtr: | |
| 2078 case InstPtr: | |
| 2079 case KlassPtr: | |
| 2080 case AryPtr: | |
| 2081 return TypePtr::BOTTOM; // Oop meet raw is not well defined | |
| 2082 default: // All else is a mistake | |
| 2083 typerr(t); | |
| 2084 } | |
| 2085 | |
| 2086 // Found an AnyPtr type vs self-RawPtr type | |
| 2087 const TypePtr *tp = t->is_ptr(); | |
| 2088 switch (tp->ptr()) { | |
| 2089 case TypePtr::TopPTR: return this; | |
| 2090 case TypePtr::BotPTR: return t; | |
| 2091 case TypePtr::Null: | |
| 2092 if( _ptr == TypePtr::TopPTR ) return t; | |
| 2093 return TypeRawPtr::BOTTOM; | |
| 2094 case TypePtr::NotNull: return TypePtr::make( AnyPtr, meet_ptr(TypePtr::NotNull), tp->meet_offset(0) ); | |
| 2095 case TypePtr::AnyNull: | |
| 2096 if( _ptr == TypePtr::Constant) return this; | |
| 2097 return make( meet_ptr(TypePtr::AnyNull) ); | |
| 2098 default: ShouldNotReachHere(); | |
| 2099 } | |
| 2100 return this; | |
| 2101 } | |
| 2102 | |
| 2103 //------------------------------xdual------------------------------------------ | |
| 2104 // Dual: compute field-by-field dual | |
| 2105 const Type *TypeRawPtr::xdual() const { | |
| 2106 return new TypeRawPtr( dual_ptr(), _bits ); | |
| 2107 } | |
| 2108 | |
| 2109 //------------------------------add_offset------------------------------------- | |
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2110 const TypePtr *TypeRawPtr::add_offset( intptr_t offset ) const { |
| 0 | 2111 if( offset == OffsetTop ) return BOTTOM; // Undefined offset-> undefined pointer |
| 2112 if( offset == OffsetBot ) return BOTTOM; // Unknown offset-> unknown pointer | |
| 2113 if( offset == 0 ) return this; // No change | |
| 2114 switch (_ptr) { | |
| 2115 case TypePtr::TopPTR: | |
| 2116 case TypePtr::BotPTR: | |
| 2117 case TypePtr::NotNull: | |
| 2118 return this; | |
| 2119 case TypePtr::Null: | |
| 2120 case TypePtr::Constant: | |
| 2121 return make( _bits+offset ); | |
| 2122 default: ShouldNotReachHere(); | |
| 2123 } | |
| 2124 return NULL; // Lint noise | |
| 2125 } | |
| 2126 | |
| 2127 //------------------------------eq--------------------------------------------- | |
| 2128 // Structural equality check for Type representations | |
| 2129 bool TypeRawPtr::eq( const Type *t ) const { | |
| 2130 const TypeRawPtr *a = (const TypeRawPtr*)t; | |
| 2131 return _bits == a->_bits && TypePtr::eq(t); | |
| 2132 } | |
| 2133 | |
| 2134 //------------------------------hash------------------------------------------- | |
| 2135 // Type-specific hashing function. | |
| 2136 int TypeRawPtr::hash(void) const { | |
| 2137 return (intptr_t)_bits + TypePtr::hash(); | |
| 2138 } | |
| 2139 | |
| 2140 //------------------------------dump2------------------------------------------ | |
| 2141 #ifndef PRODUCT | |
| 2142 void TypeRawPtr::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 2143 if( _ptr == Constant ) | |
| 2144 st->print(INTPTR_FORMAT, _bits); | |
| 2145 else | |
| 2146 st->print("rawptr:%s", ptr_msg[_ptr]); | |
| 2147 } | |
| 2148 #endif | |
| 2149 | |
| 2150 //============================================================================= | |
| 2151 // Convenience common pre-built type. | |
| 2152 const TypeOopPtr *TypeOopPtr::BOTTOM; | |
| 2153 | |
| 163 | 2154 //------------------------------TypeOopPtr------------------------------------- |
| 2155 TypeOopPtr::TypeOopPtr( TYPES t, PTR ptr, ciKlass* k, bool xk, ciObject* o, int offset, int instance_id ) | |
| 2156 : TypePtr(t, ptr, offset), | |
| 2157 _const_oop(o), _klass(k), | |
| 2158 _klass_is_exact(xk), | |
| 2159 _is_ptr_to_narrowoop(false), | |
| 2160 _instance_id(instance_id) { | |
| 2161 #ifdef _LP64 | |
| 2162 if (UseCompressedOops && _offset != 0) { | |
| 2163 if (klass() == NULL) { | |
| 2164 assert(this->isa_aryptr(), "only arrays without klass"); | |
| 2165 _is_ptr_to_narrowoop = true; | |
| 2166 } else if (_offset == oopDesc::klass_offset_in_bytes()) { | |
| 2167 _is_ptr_to_narrowoop = true; | |
| 2168 } else if (this->isa_aryptr()) { | |
| 2169 _is_ptr_to_narrowoop = (klass()->is_obj_array_klass() && | |
| 2170 _offset != arrayOopDesc::length_offset_in_bytes()); | |
| 2171 } else if (klass() == ciEnv::current()->Class_klass() && | |
| 2172 (_offset == java_lang_Class::klass_offset_in_bytes() || | |
| 2173 _offset == java_lang_Class::array_klass_offset_in_bytes())) { | |
| 2174 // Special hidden fields from the Class. | |
| 2175 assert(this->isa_instptr(), "must be an instance ptr."); | |
| 2176 _is_ptr_to_narrowoop = true; | |
| 2177 } else if (klass()->is_instance_klass()) { | |
| 2178 ciInstanceKlass* ik = klass()->as_instance_klass(); | |
| 2179 ciField* field = NULL; | |
| 2180 if (this->isa_klassptr()) { | |
| 2181 // Perm objects don't use compressed references, except for | |
| 2182 // static fields which are currently compressed. | |
| 2183 field = ik->get_field_by_offset(_offset, true); | |
| 2184 if (field != NULL) { | |
| 2185 BasicType basic_elem_type = field->layout_type(); | |
| 2186 _is_ptr_to_narrowoop = (basic_elem_type == T_OBJECT || | |
| 2187 basic_elem_type == T_ARRAY); | |
| 2188 } | |
| 2189 } else if (_offset == OffsetBot || _offset == OffsetTop) { | |
| 2190 // unsafe access | |
| 2191 _is_ptr_to_narrowoop = true; | |
| 2192 } else { // exclude unsafe ops | |
| 2193 assert(this->isa_instptr(), "must be an instance ptr."); | |
| 2194 // Field which contains a compressed oop references. | |
| 2195 field = ik->get_field_by_offset(_offset, false); | |
| 2196 if (field != NULL) { | |
| 2197 BasicType basic_elem_type = field->layout_type(); | |
| 2198 _is_ptr_to_narrowoop = (basic_elem_type == T_OBJECT || | |
| 2199 basic_elem_type == T_ARRAY); | |
| 2200 } else if (klass()->equals(ciEnv::current()->Object_klass())) { | |
| 2201 // Compile::find_alias_type() cast exactness on all types to verify | |
| 2202 // that it does not affect alias type. | |
| 2203 _is_ptr_to_narrowoop = true; | |
| 2204 } else { | |
| 2205 // Type for the copy start in LibraryCallKit::inline_native_clone(). | |
| 2206 assert(!klass_is_exact(), "only non-exact klass"); | |
| 2207 _is_ptr_to_narrowoop = true; | |
| 2208 } | |
| 2209 } | |
| 2210 } | |
| 2211 } | |
| 2212 #endif | |
| 2213 } | |
| 2214 | |
| 0 | 2215 //------------------------------make------------------------------------------- |
| 2216 const TypeOopPtr *TypeOopPtr::make(PTR ptr, | |
| 2217 int offset) { | |
| 2218 assert(ptr != Constant, "no constant generic pointers"); | |
| 2219 ciKlass* k = ciKlassKlass::make(); | |
| 2220 bool xk = false; | |
| 2221 ciObject* o = NULL; | |
| 223 | 2222 return (TypeOopPtr*)(new TypeOopPtr(OopPtr, ptr, k, xk, o, offset, InstanceBot))->hashcons(); |
| 0 | 2223 } |
| 2224 | |
| 2225 | |
| 2226 //------------------------------cast_to_ptr_type------------------------------- | |
| 2227 const Type *TypeOopPtr::cast_to_ptr_type(PTR ptr) const { | |
| 2228 assert(_base == OopPtr, "subclass must override cast_to_ptr_type"); | |
| 2229 if( ptr == _ptr ) return this; | |
| 2230 return make(ptr, _offset); | |
| 2231 } | |
| 2232 | |
| 247 | 2233 //-----------------------------cast_to_instance_id---------------------------- |
| 223 | 2234 const TypeOopPtr *TypeOopPtr::cast_to_instance_id(int instance_id) const { |
| 0 | 2235 // There are no instances of a general oop. |
| 2236 // Return self unchanged. | |
| 2237 return this; | |
| 2238 } | |
| 2239 | |
| 2240 //-----------------------------cast_to_exactness------------------------------- | |
| 2241 const Type *TypeOopPtr::cast_to_exactness(bool klass_is_exact) const { | |
| 2242 // There is no such thing as an exact general oop. | |
| 2243 // Return self unchanged. | |
| 2244 return this; | |
| 2245 } | |
| 2246 | |
| 2247 | |
| 2248 //------------------------------as_klass_type---------------------------------- | |
| 2249 // Return the klass type corresponding to this instance or array type. | |
| 2250 // It is the type that is loaded from an object of this type. | |
| 2251 const TypeKlassPtr* TypeOopPtr::as_klass_type() const { | |
| 2252 ciKlass* k = klass(); | |
| 2253 bool xk = klass_is_exact(); | |
| 2254 if (k == NULL || !k->is_java_klass()) | |
| 2255 return TypeKlassPtr::OBJECT; | |
| 2256 else | |
| 2257 return TypeKlassPtr::make(xk? Constant: NotNull, k, 0); | |
| 2258 } | |
| 2259 | |
| 2260 | |
| 2261 //------------------------------meet------------------------------------------- | |
| 2262 // Compute the MEET of two types. It returns a new Type object. | |
| 2263 const Type *TypeOopPtr::xmeet( const Type *t ) const { | |
| 2264 // Perform a fast test for common case; meeting the same types together. | |
| 2265 if( this == t ) return this; // Meeting same type-rep? | |
| 2266 | |
| 2267 // Current "this->_base" is OopPtr | |
| 2268 switch (t->base()) { // switch on original type | |
| 2269 | |
| 2270 case Int: // Mixing ints & oops happens when javac | |
| 2271 case Long: // reuses local variables | |
| 2272 case FloatTop: | |
| 2273 case FloatCon: | |
| 2274 case FloatBot: | |
| 2275 case DoubleTop: | |
| 2276 case DoubleCon: | |
| 2277 case DoubleBot: | |
|
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|
2278 case NarrowOop: |
| 0 | 2279 case Bottom: // Ye Olde Default |
| 2280 return Type::BOTTOM; | |
| 2281 case Top: | |
| 2282 return this; | |
| 2283 | |
| 2284 default: // All else is a mistake | |
| 2285 typerr(t); | |
| 2286 | |
| 2287 case RawPtr: | |
| 2288 return TypePtr::BOTTOM; // Oop meet raw is not well defined | |
| 2289 | |
| 2290 case AnyPtr: { | |
| 2291 // Found an AnyPtr type vs self-OopPtr type | |
| 2292 const TypePtr *tp = t->is_ptr(); | |
| 2293 int offset = meet_offset(tp->offset()); | |
| 2294 PTR ptr = meet_ptr(tp->ptr()); | |
| 2295 switch (tp->ptr()) { | |
| 2296 case Null: | |
| 2297 if (ptr == Null) return TypePtr::make(AnyPtr, ptr, offset); | |
| 2298 // else fall through: | |
| 2299 case TopPTR: | |
| 2300 case AnyNull: | |
| 2301 return make(ptr, offset); | |
| 2302 case BotPTR: | |
| 2303 case NotNull: | |
| 2304 return TypePtr::make(AnyPtr, ptr, offset); | |
| 2305 default: typerr(t); | |
| 2306 } | |
| 2307 } | |
| 2308 | |
| 2309 case OopPtr: { // Meeting to other OopPtrs | |
| 2310 const TypeOopPtr *tp = t->is_oopptr(); | |
| 2311 return make( meet_ptr(tp->ptr()), meet_offset(tp->offset()) ); | |
| 2312 } | |
| 2313 | |
| 2314 case InstPtr: // For these, flip the call around to cut down | |
| 2315 case KlassPtr: // on the cases I have to handle. | |
| 2316 case AryPtr: | |
| 2317 return t->xmeet(this); // Call in reverse direction | |
| 2318 | |
| 2319 } // End of switch | |
| 2320 return this; // Return the double constant | |
| 2321 } | |
| 2322 | |
| 2323 | |
| 2324 //------------------------------xdual------------------------------------------ | |
| 2325 // Dual of a pure heap pointer. No relevant klass or oop information. | |
| 2326 const Type *TypeOopPtr::xdual() const { | |
| 2327 assert(klass() == ciKlassKlass::make(), "no klasses here"); | |
| 2328 assert(const_oop() == NULL, "no constants here"); | |
| 223 | 2329 return new TypeOopPtr(_base, dual_ptr(), klass(), klass_is_exact(), const_oop(), dual_offset(), dual_instance_id() ); |
| 0 | 2330 } |
| 2331 | |
| 2332 //--------------------------make_from_klass_common----------------------------- | |
| 2333 // Computes the element-type given a klass. | |
| 2334 const TypeOopPtr* TypeOopPtr::make_from_klass_common(ciKlass *klass, bool klass_change, bool try_for_exact) { | |
| 2335 assert(klass->is_java_klass(), "must be java language klass"); | |
| 2336 if (klass->is_instance_klass()) { | |
| 2337 Compile* C = Compile::current(); | |
| 2338 Dependencies* deps = C->dependencies(); | |
| 2339 assert((deps != NULL) == (C->method() != NULL && C->method()->code_size() > 0), "sanity"); | |
| 2340 // Element is an instance | |
| 2341 bool klass_is_exact = false; | |
| 2342 if (klass->is_loaded()) { | |
| 2343 // Try to set klass_is_exact. | |
| 2344 ciInstanceKlass* ik = klass->as_instance_klass(); | |
| 2345 klass_is_exact = ik->is_final(); | |
| 2346 if (!klass_is_exact && klass_change | |
| 2347 && deps != NULL && UseUniqueSubclasses) { | |
| 2348 ciInstanceKlass* sub = ik->unique_concrete_subklass(); | |
| 2349 if (sub != NULL) { | |
| 2350 deps->assert_abstract_with_unique_concrete_subtype(ik, sub); | |
| 2351 klass = ik = sub; | |
| 2352 klass_is_exact = sub->is_final(); | |
| 2353 } | |
| 2354 } | |
| 2355 if (!klass_is_exact && try_for_exact | |
| 2356 && deps != NULL && UseExactTypes) { | |
| 2357 if (!ik->is_interface() && !ik->has_subklass()) { | |
| 2358 // Add a dependence; if concrete subclass added we need to recompile | |
| 2359 deps->assert_leaf_type(ik); | |
| 2360 klass_is_exact = true; | |
| 2361 } | |
| 2362 } | |
| 2363 } | |
| 2364 return TypeInstPtr::make(TypePtr::BotPTR, klass, klass_is_exact, NULL, 0); | |
| 2365 } else if (klass->is_obj_array_klass()) { | |
| 2366 // Element is an object array. Recursively call ourself. | |
| 2367 const TypeOopPtr *etype = TypeOopPtr::make_from_klass_common(klass->as_obj_array_klass()->element_klass(), false, try_for_exact); | |
| 2368 bool xk = etype->klass_is_exact(); | |
| 2369 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::POS); | |
| 2370 // We used to pass NotNull in here, asserting that the sub-arrays | |
| 2371 // are all not-null. This is not true in generally, as code can | |
| 2372 // slam NULLs down in the subarrays. | |
| 2373 const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::BotPTR, arr0, klass, xk, 0); | |
| 2374 return arr; | |
| 2375 } else if (klass->is_type_array_klass()) { | |
| 2376 // Element is an typeArray | |
| 2377 const Type* etype = get_const_basic_type(klass->as_type_array_klass()->element_type()); | |
| 2378 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::POS); | |
| 2379 // We used to pass NotNull in here, asserting that the array pointer | |
| 2380 // is not-null. That was not true in general. | |
| 2381 const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::BotPTR, arr0, klass, true, 0); | |
| 2382 return arr; | |
| 2383 } else { | |
| 2384 ShouldNotReachHere(); | |
| 2385 return NULL; | |
| 2386 } | |
| 2387 } | |
| 2388 | |
| 2389 //------------------------------make_from_constant----------------------------- | |
| 2390 // Make a java pointer from an oop constant | |
| 2391 const TypeOopPtr* TypeOopPtr::make_from_constant(ciObject* o) { | |
| 2392 if (o->is_method_data() || o->is_method()) { | |
| 2393 // Treat much like a typeArray of bytes, like below, but fake the type... | |
| 2394 assert(o->has_encoding(), "must be a perm space object"); | |
| 2395 const Type* etype = (Type*)get_const_basic_type(T_BYTE); | |
| 2396 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::POS); | |
| 2397 ciKlass *klass = ciTypeArrayKlass::make((BasicType) T_BYTE); | |
| 2398 assert(o->has_encoding(), "method data oops should be tenured"); | |
| 2399 const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::Constant, o, arr0, klass, true, 0); | |
| 2400 return arr; | |
| 2401 } else { | |
| 2402 assert(o->is_java_object(), "must be java language object"); | |
| 2403 assert(!o->is_null_object(), "null object not yet handled here."); | |
| 2404 ciKlass *klass = o->klass(); | |
| 2405 if (klass->is_instance_klass()) { | |
| 2406 // Element is an instance | |
| 2407 if (!o->has_encoding()) { // not a perm-space constant | |
| 2408 // %%% remove this restriction by rewriting non-perm ConPNodes in a later phase | |
| 2409 return TypeInstPtr::make(TypePtr::NotNull, klass, true, NULL, 0); | |
| 2410 } | |
| 2411 return TypeInstPtr::make(o); | |
| 2412 } else if (klass->is_obj_array_klass()) { | |
| 2413 // Element is an object array. Recursively call ourself. | |
| 2414 const Type *etype = | |
| 2415 TypeOopPtr::make_from_klass_raw(klass->as_obj_array_klass()->element_klass()); | |
| 2416 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::make(o->as_array()->length())); | |
| 2417 // We used to pass NotNull in here, asserting that the sub-arrays | |
| 2418 // are all not-null. This is not true in generally, as code can | |
| 2419 // slam NULLs down in the subarrays. | |
| 2420 if (!o->has_encoding()) { // not a perm-space constant | |
| 2421 // %%% remove this restriction by rewriting non-perm ConPNodes in a later phase | |
| 2422 return TypeAryPtr::make(TypePtr::NotNull, arr0, klass, true, 0); | |
| 2423 } | |
| 2424 const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::Constant, o, arr0, klass, true, 0); | |
| 2425 return arr; | |
| 2426 } else if (klass->is_type_array_klass()) { | |
| 2427 // Element is an typeArray | |
| 2428 const Type* etype = | |
| 2429 (Type*)get_const_basic_type(klass->as_type_array_klass()->element_type()); | |
| 2430 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::make(o->as_array()->length())); | |
| 2431 // We used to pass NotNull in here, asserting that the array pointer | |
| 2432 // is not-null. That was not true in general. | |
| 2433 if (!o->has_encoding()) { // not a perm-space constant | |
| 2434 // %%% remove this restriction by rewriting non-perm ConPNodes in a later phase | |
| 2435 return TypeAryPtr::make(TypePtr::NotNull, arr0, klass, true, 0); | |
| 2436 } | |
| 2437 const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::Constant, o, arr0, klass, true, 0); | |
| 2438 return arr; | |
| 2439 } | |
| 2440 } | |
| 2441 | |
| 2442 ShouldNotReachHere(); | |
| 2443 return NULL; | |
| 2444 } | |
| 2445 | |
| 2446 //------------------------------get_con---------------------------------------- | |
| 2447 intptr_t TypeOopPtr::get_con() const { | |
| 2448 assert( _ptr == Null || _ptr == Constant, "" ); | |
| 2449 assert( _offset >= 0, "" ); | |
| 2450 | |
| 2451 if (_offset != 0) { | |
| 2452 // After being ported to the compiler interface, the compiler no longer | |
| 2453 // directly manipulates the addresses of oops. Rather, it only has a pointer | |
| 2454 // to a handle at compile time. This handle is embedded in the generated | |
| 2455 // code and dereferenced at the time the nmethod is made. Until that time, | |
| 2456 // it is not reasonable to do arithmetic with the addresses of oops (we don't | |
| 2457 // have access to the addresses!). This does not seem to currently happen, | |
| 2458 // but this assertion here is to help prevent its occurrance. | |
| 2459 tty->print_cr("Found oop constant with non-zero offset"); | |
| 2460 ShouldNotReachHere(); | |
| 2461 } | |
| 2462 | |
| 2463 return (intptr_t)const_oop()->encoding(); | |
| 2464 } | |
| 2465 | |
| 2466 | |
| 2467 //-----------------------------filter------------------------------------------ | |
| 2468 // Do not allow interface-vs.-noninterface joins to collapse to top. | |
| 2469 const Type *TypeOopPtr::filter( const Type *kills ) const { | |
| 2470 | |
| 2471 const Type* ft = join(kills); | |
| 2472 const TypeInstPtr* ftip = ft->isa_instptr(); | |
| 2473 const TypeInstPtr* ktip = kills->isa_instptr(); | |
| 2474 | |
| 2475 if (ft->empty()) { | |
| 2476 // Check for evil case of 'this' being a class and 'kills' expecting an | |
| 2477 // interface. This can happen because the bytecodes do not contain | |
| 2478 // enough type info to distinguish a Java-level interface variable | |
| 2479 // from a Java-level object variable. If we meet 2 classes which | |
| 2480 // both implement interface I, but their meet is at 'j/l/O' which | |
| 2481 // doesn't implement I, we have no way to tell if the result should | |
| 2482 // be 'I' or 'j/l/O'. Thus we'll pick 'j/l/O'. If this then flows | |
| 2483 // into a Phi which "knows" it's an Interface type we'll have to | |
| 2484 // uplift the type. | |
| 2485 if (!empty() && ktip != NULL && ktip->is_loaded() && ktip->klass()->is_interface()) | |
| 2486 return kills; // Uplift to interface | |
| 2487 | |
| 2488 return Type::TOP; // Canonical empty value | |
| 2489 } | |
| 2490 | |
| 2491 // If we have an interface-typed Phi or cast and we narrow to a class type, | |
| 2492 // the join should report back the class. However, if we have a J/L/Object | |
| 2493 // class-typed Phi and an interface flows in, it's possible that the meet & | |
| 2494 // join report an interface back out. This isn't possible but happens | |
| 2495 // because the type system doesn't interact well with interfaces. | |
| 2496 if (ftip != NULL && ktip != NULL && | |
| 2497 ftip->is_loaded() && ftip->klass()->is_interface() && | |
| 2498 ktip->is_loaded() && !ktip->klass()->is_interface()) { | |
| 2499 // Happens in a CTW of rt.jar, 320-341, no extra flags | |
| 2500 return ktip->cast_to_ptr_type(ftip->ptr()); | |
| 2501 } | |
| 2502 | |
| 2503 return ft; | |
| 2504 } | |
| 2505 | |
| 2506 //------------------------------eq--------------------------------------------- | |
| 2507 // Structural equality check for Type representations | |
| 2508 bool TypeOopPtr::eq( const Type *t ) const { | |
| 2509 const TypeOopPtr *a = (const TypeOopPtr*)t; | |
| 2510 if (_klass_is_exact != a->_klass_is_exact || | |
| 2511 _instance_id != a->_instance_id) return false; | |
| 2512 ciObject* one = const_oop(); | |
| 2513 ciObject* two = a->const_oop(); | |
| 2514 if (one == NULL || two == NULL) { | |
| 2515 return (one == two) && TypePtr::eq(t); | |
| 2516 } else { | |
| 2517 return one->equals(two) && TypePtr::eq(t); | |
| 2518 } | |
| 2519 } | |
| 2520 | |
| 2521 //------------------------------hash------------------------------------------- | |
| 2522 // Type-specific hashing function. | |
| 2523 int TypeOopPtr::hash(void) const { | |
| 2524 return | |
| 2525 (const_oop() ? const_oop()->hash() : 0) + | |
| 2526 _klass_is_exact + | |
| 2527 _instance_id + | |
| 2528 TypePtr::hash(); | |
| 2529 } | |
| 2530 | |
| 2531 //------------------------------dump2------------------------------------------ | |
| 2532 #ifndef PRODUCT | |
| 2533 void TypeOopPtr::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 2534 st->print("oopptr:%s", ptr_msg[_ptr]); | |
| 2535 if( _klass_is_exact ) st->print(":exact"); | |
| 2536 if( const_oop() ) st->print(INTPTR_FORMAT, const_oop()); | |
| 2537 switch( _offset ) { | |
| 2538 case OffsetTop: st->print("+top"); break; | |
| 2539 case OffsetBot: st->print("+any"); break; | |
| 2540 case 0: break; | |
| 2541 default: st->print("+%d",_offset); break; | |
| 2542 } | |
| 223 | 2543 if (_instance_id == InstanceTop) |
| 2544 st->print(",iid=top"); | |
| 2545 else if (_instance_id != InstanceBot) | |
| 0 | 2546 st->print(",iid=%d",_instance_id); |
| 2547 } | |
| 2548 #endif | |
| 2549 | |
| 2550 //------------------------------singleton-------------------------------------- | |
| 2551 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
| 2552 // constants | |
| 2553 bool TypeOopPtr::singleton(void) const { | |
| 2554 // detune optimizer to not generate constant oop + constant offset as a constant! | |
| 2555 // TopPTR, Null, AnyNull, Constant are all singletons | |
| 2556 return (_offset == 0) && !below_centerline(_ptr); | |
| 2557 } | |
| 2558 | |
| 2559 //------------------------------add_offset------------------------------------- | |
|
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2560 const TypePtr *TypeOopPtr::add_offset( intptr_t offset ) const { |
| 0 | 2561 return make( _ptr, xadd_offset(offset) ); |
| 2562 } | |
| 2563 | |
| 223 | 2564 //------------------------------meet_instance_id-------------------------------- |
| 2565 int TypeOopPtr::meet_instance_id( int instance_id ) const { | |
| 2566 // Either is 'TOP' instance? Return the other instance! | |
| 2567 if( _instance_id == InstanceTop ) return instance_id; | |
| 2568 if( instance_id == InstanceTop ) return _instance_id; | |
| 2569 // If either is different, return 'BOTTOM' instance | |
| 2570 if( _instance_id != instance_id ) return InstanceBot; | |
| 2571 return _instance_id; | |
| 0 | 2572 } |
| 2573 | |
| 223 | 2574 //------------------------------dual_instance_id-------------------------------- |
| 2575 int TypeOopPtr::dual_instance_id( ) const { | |
| 2576 if( _instance_id == InstanceTop ) return InstanceBot; // Map TOP into BOTTOM | |
| 2577 if( _instance_id == InstanceBot ) return InstanceTop; // Map BOTTOM into TOP | |
| 2578 return _instance_id; // Map everything else into self | |
| 2579 } | |
| 2580 | |
| 2581 | |
| 0 | 2582 //============================================================================= |
| 2583 // Convenience common pre-built types. | |
| 2584 const TypeInstPtr *TypeInstPtr::NOTNULL; | |
| 2585 const TypeInstPtr *TypeInstPtr::BOTTOM; | |
| 2586 const TypeInstPtr *TypeInstPtr::MIRROR; | |
| 2587 const TypeInstPtr *TypeInstPtr::MARK; | |
| 2588 const TypeInstPtr *TypeInstPtr::KLASS; | |
| 2589 | |
| 2590 //------------------------------TypeInstPtr------------------------------------- | |
| 2591 TypeInstPtr::TypeInstPtr(PTR ptr, ciKlass* k, bool xk, ciObject* o, int off, int instance_id) | |
| 2592 : TypeOopPtr(InstPtr, ptr, k, xk, o, off, instance_id), _name(k->name()) { | |
| 2593 assert(k != NULL && | |
| 2594 (k->is_loaded() || o == NULL), | |
| 2595 "cannot have constants with non-loaded klass"); | |
| 2596 }; | |
| 2597 | |
| 2598 //------------------------------make------------------------------------------- | |
| 2599 const TypeInstPtr *TypeInstPtr::make(PTR ptr, | |
| 2600 ciKlass* k, | |
| 2601 bool xk, | |
| 2602 ciObject* o, | |
| 2603 int offset, | |
| 2604 int instance_id) { | |
| 2605 assert( !k->is_loaded() || k->is_instance_klass() || | |
| 2606 k->is_method_klass(), "Must be for instance or method"); | |
| 2607 // Either const_oop() is NULL or else ptr is Constant | |
| 2608 assert( (!o && ptr != Constant) || (o && ptr == Constant), | |
| 2609 "constant pointers must have a value supplied" ); | |
| 2610 // Ptr is never Null | |
| 2611 assert( ptr != Null, "NULL pointers are not typed" ); | |
| 2612 | |
| 247 | 2613 assert(instance_id <= 0 || xk || !UseExactTypes, "instances are always exactly typed"); |
| 0 | 2614 if (!UseExactTypes) xk = false; |
| 2615 if (ptr == Constant) { | |
| 2616 // Note: This case includes meta-object constants, such as methods. | |
| 2617 xk = true; | |
| 2618 } else if (k->is_loaded()) { | |
| 2619 ciInstanceKlass* ik = k->as_instance_klass(); | |
| 2620 if (!xk && ik->is_final()) xk = true; // no inexact final klass | |
| 2621 if (xk && ik->is_interface()) xk = false; // no exact interface | |
| 2622 } | |
| 2623 | |
| 2624 // Now hash this baby | |
| 2625 TypeInstPtr *result = | |
| 2626 (TypeInstPtr*)(new TypeInstPtr(ptr, k, xk, o ,offset, instance_id))->hashcons(); | |
| 2627 | |
| 2628 return result; | |
| 2629 } | |
| 2630 | |
| 2631 | |
| 2632 //------------------------------cast_to_ptr_type------------------------------- | |
| 2633 const Type *TypeInstPtr::cast_to_ptr_type(PTR ptr) const { | |
| 2634 if( ptr == _ptr ) return this; | |
| 2635 // Reconstruct _sig info here since not a problem with later lazy | |
| 2636 // construction, _sig will show up on demand. | |
| 223 | 2637 return make(ptr, klass(), klass_is_exact(), const_oop(), _offset, _instance_id); |
| 0 | 2638 } |
| 2639 | |
| 2640 | |
| 2641 //-----------------------------cast_to_exactness------------------------------- | |
| 2642 const Type *TypeInstPtr::cast_to_exactness(bool klass_is_exact) const { | |
| 2643 if( klass_is_exact == _klass_is_exact ) return this; | |
| 2644 if (!UseExactTypes) return this; | |
| 2645 if (!_klass->is_loaded()) return this; | |
| 2646 ciInstanceKlass* ik = _klass->as_instance_klass(); | |
| 2647 if( (ik->is_final() || _const_oop) ) return this; // cannot clear xk | |
| 2648 if( ik->is_interface() ) return this; // cannot set xk | |
| 2649 return make(ptr(), klass(), klass_is_exact, const_oop(), _offset, _instance_id); | |
| 2650 } | |
| 2651 | |
| 247 | 2652 //-----------------------------cast_to_instance_id---------------------------- |
| 223 | 2653 const TypeOopPtr *TypeInstPtr::cast_to_instance_id(int instance_id) const { |
| 2654 if( instance_id == _instance_id ) return this; | |
| 247 | 2655 return make(_ptr, klass(), _klass_is_exact, const_oop(), _offset, instance_id); |
| 0 | 2656 } |
| 2657 | |
| 2658 //------------------------------xmeet_unloaded--------------------------------- | |
| 2659 // Compute the MEET of two InstPtrs when at least one is unloaded. | |
| 2660 // Assume classes are different since called after check for same name/class-loader | |
| 2661 const TypeInstPtr *TypeInstPtr::xmeet_unloaded(const TypeInstPtr *tinst) const { | |
| 2662 int off = meet_offset(tinst->offset()); | |
| 2663 PTR ptr = meet_ptr(tinst->ptr()); | |
| 2664 | |
| 2665 const TypeInstPtr *loaded = is_loaded() ? this : tinst; | |
| 2666 const TypeInstPtr *unloaded = is_loaded() ? tinst : this; | |
| 2667 if( loaded->klass()->equals(ciEnv::current()->Object_klass()) ) { | |
| 2668 // | |
| 2669 // Meet unloaded class with java/lang/Object | |
| 2670 // | |
| 2671 // Meet | |
| 2672 // | Unloaded Class | |
| 2673 // Object | TOP | AnyNull | Constant | NotNull | BOTTOM | | |
| 2674 // =================================================================== | |
| 2675 // TOP | ..........................Unloaded......................| | |
| 2676 // AnyNull | U-AN |................Unloaded......................| | |
| 2677 // Constant | ... O-NN .................................. | O-BOT | | |
| 2678 // NotNull | ... O-NN .................................. | O-BOT | | |
| 2679 // BOTTOM | ........................Object-BOTTOM ..................| | |
| 2680 // | |
| 2681 assert(loaded->ptr() != TypePtr::Null, "insanity check"); | |
| 2682 // | |
| 2683 if( loaded->ptr() == TypePtr::TopPTR ) { return unloaded; } | |
| 2684 else if (loaded->ptr() == TypePtr::AnyNull) { return TypeInstPtr::make( ptr, unloaded->klass() ); } | |
| 2685 else if (loaded->ptr() == TypePtr::BotPTR ) { return TypeInstPtr::BOTTOM; } | |
| 2686 else if (loaded->ptr() == TypePtr::Constant || loaded->ptr() == TypePtr::NotNull) { | |
| 2687 if (unloaded->ptr() == TypePtr::BotPTR ) { return TypeInstPtr::BOTTOM; } | |
| 2688 else { return TypeInstPtr::NOTNULL; } | |
| 2689 } | |
| 2690 else if( unloaded->ptr() == TypePtr::TopPTR ) { return unloaded; } | |
| 2691 | |
| 2692 return unloaded->cast_to_ptr_type(TypePtr::AnyNull)->is_instptr(); | |
| 2693 } | |
| 2694 | |
| 2695 // Both are unloaded, not the same class, not Object | |
| 2696 // Or meet unloaded with a different loaded class, not java/lang/Object | |
| 2697 if( ptr != TypePtr::BotPTR ) { | |
| 2698 return TypeInstPtr::NOTNULL; | |
| 2699 } | |
| 2700 return TypeInstPtr::BOTTOM; | |
| 2701 } | |
| 2702 | |
| 2703 | |
| 2704 //------------------------------meet------------------------------------------- | |
| 2705 // Compute the MEET of two types. It returns a new Type object. | |
| 2706 const Type *TypeInstPtr::xmeet( const Type *t ) const { | |
| 2707 // Perform a fast test for common case; meeting the same types together. | |
| 2708 if( this == t ) return this; // Meeting same type-rep? | |
| 2709 | |
| 2710 // Current "this->_base" is Pointer | |
| 2711 switch (t->base()) { // switch on original type | |
| 2712 | |
| 2713 case Int: // Mixing ints & oops happens when javac | |
| 2714 case Long: // reuses local variables | |
| 2715 case FloatTop: | |
| 2716 case FloatCon: | |
| 2717 case FloatBot: | |
| 2718 case DoubleTop: | |
| 2719 case DoubleCon: | |
| 2720 case DoubleBot: | |
|
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diff
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|
2721 case NarrowOop: |
| 0 | 2722 case Bottom: // Ye Olde Default |
| 2723 return Type::BOTTOM; | |
| 2724 case Top: | |
| 2725 return this; | |
| 2726 | |
| 2727 default: // All else is a mistake | |
| 2728 typerr(t); | |
| 2729 | |
| 2730 case RawPtr: return TypePtr::BOTTOM; | |
| 2731 | |
| 2732 case AryPtr: { // All arrays inherit from Object class | |
| 2733 const TypeAryPtr *tp = t->is_aryptr(); | |
| 2734 int offset = meet_offset(tp->offset()); | |
| 2735 PTR ptr = meet_ptr(tp->ptr()); | |
| 223 | 2736 int instance_id = meet_instance_id(tp->instance_id()); |
| 0 | 2737 switch (ptr) { |
| 2738 case TopPTR: | |
| 2739 case AnyNull: // Fall 'down' to dual of object klass | |
| 2740 if (klass()->equals(ciEnv::current()->Object_klass())) { | |
| 223 | 2741 return TypeAryPtr::make(ptr, tp->ary(), tp->klass(), tp->klass_is_exact(), offset, instance_id); |
| 0 | 2742 } else { |
| 2743 // cannot subclass, so the meet has to fall badly below the centerline | |
| 2744 ptr = NotNull; | |
| 223 | 2745 instance_id = InstanceBot; |
| 2746 return TypeInstPtr::make( ptr, ciEnv::current()->Object_klass(), false, NULL, offset, instance_id); | |
| 0 | 2747 } |
| 2748 case Constant: | |
| 2749 case NotNull: | |
| 2750 case BotPTR: // Fall down to object klass | |
| 2751 // LCA is object_klass, but if we subclass from the top we can do better | |
| 2752 if( above_centerline(_ptr) ) { // if( _ptr == TopPTR || _ptr == AnyNull ) | |
| 2753 // If 'this' (InstPtr) is above the centerline and it is Object class | |
| 2754 // then we can subclass in the Java class heirarchy. | |
| 2755 if (klass()->equals(ciEnv::current()->Object_klass())) { | |
| 2756 // that is, tp's array type is a subtype of my klass | |
| 223 | 2757 return TypeAryPtr::make(ptr, tp->ary(), tp->klass(), tp->klass_is_exact(), offset, instance_id); |
| 0 | 2758 } |
| 2759 } | |
| 2760 // The other case cannot happen, since I cannot be a subtype of an array. | |
| 2761 // The meet falls down to Object class below centerline. | |
| 2762 if( ptr == Constant ) | |
| 2763 ptr = NotNull; | |
| 223 | 2764 instance_id = InstanceBot; |
| 2765 return make( ptr, ciEnv::current()->Object_klass(), false, NULL, offset, instance_id ); | |
| 0 | 2766 default: typerr(t); |
| 2767 } | |
| 2768 } | |
| 2769 | |
| 2770 case OopPtr: { // Meeting to OopPtrs | |
| 2771 // Found a OopPtr type vs self-InstPtr type | |
| 2772 const TypePtr *tp = t->is_oopptr(); | |
| 2773 int offset = meet_offset(tp->offset()); | |
| 2774 PTR ptr = meet_ptr(tp->ptr()); | |
| 2775 switch (tp->ptr()) { | |
| 2776 case TopPTR: | |
| 223 | 2777 case AnyNull: { |
| 2778 int instance_id = meet_instance_id(InstanceTop); | |
| 0 | 2779 return make(ptr, klass(), klass_is_exact(), |
| 223 | 2780 (ptr == Constant ? const_oop() : NULL), offset, instance_id); |
| 2781 } | |
| 0 | 2782 case NotNull: |
| 2783 case BotPTR: | |
| 2784 return TypeOopPtr::make(ptr, offset); | |
| 2785 default: typerr(t); | |
| 2786 } | |
| 2787 } | |
| 2788 | |
| 2789 case AnyPtr: { // Meeting to AnyPtrs | |
| 2790 // Found an AnyPtr type vs self-InstPtr type | |
| 2791 const TypePtr *tp = t->is_ptr(); | |
| 2792 int offset = meet_offset(tp->offset()); | |
| 2793 PTR ptr = meet_ptr(tp->ptr()); | |
| 2794 switch (tp->ptr()) { | |
| 2795 case Null: | |
| 2796 if( ptr == Null ) return TypePtr::make( AnyPtr, ptr, offset ); | |
| 223 | 2797 // else fall through to AnyNull |
| 0 | 2798 case TopPTR: |
| 223 | 2799 case AnyNull: { |
| 2800 int instance_id = meet_instance_id(InstanceTop); | |
| 0 | 2801 return make( ptr, klass(), klass_is_exact(), |
| 223 | 2802 (ptr == Constant ? const_oop() : NULL), offset, instance_id); |
| 2803 } | |
| 0 | 2804 case NotNull: |
| 2805 case BotPTR: | |
| 2806 return TypePtr::make( AnyPtr, ptr, offset ); | |
| 2807 default: typerr(t); | |
| 2808 } | |
| 2809 } | |
| 2810 | |
| 2811 /* | |
| 2812 A-top } | |
| 2813 / | \ } Tops | |
| 2814 B-top A-any C-top } | |
| 2815 | / | \ | } Any-nulls | |
| 2816 B-any | C-any } | |
| 2817 | | | | |
| 2818 B-con A-con C-con } constants; not comparable across classes | |
| 2819 | | | | |
| 2820 B-not | C-not } | |
| 2821 | \ | / | } not-nulls | |
| 2822 B-bot A-not C-bot } | |
| 2823 \ | / } Bottoms | |
| 2824 A-bot } | |
| 2825 */ | |
| 2826 | |
| 2827 case InstPtr: { // Meeting 2 Oops? | |
| 2828 // Found an InstPtr sub-type vs self-InstPtr type | |
| 2829 const TypeInstPtr *tinst = t->is_instptr(); | |
| 2830 int off = meet_offset( tinst->offset() ); | |
| 2831 PTR ptr = meet_ptr( tinst->ptr() ); | |
| 223 | 2832 int instance_id = meet_instance_id(tinst->instance_id()); |
| 0 | 2833 |
| 2834 // Check for easy case; klasses are equal (and perhaps not loaded!) | |
| 2835 // If we have constants, then we created oops so classes are loaded | |
| 2836 // and we can handle the constants further down. This case handles | |
| 2837 // both-not-loaded or both-loaded classes | |
| 2838 if (ptr != Constant && klass()->equals(tinst->klass()) && klass_is_exact() == tinst->klass_is_exact()) { | |
| 2839 return make( ptr, klass(), klass_is_exact(), NULL, off, instance_id ); | |
| 2840 } | |
| 2841 | |
| 2842 // Classes require inspection in the Java klass hierarchy. Must be loaded. | |
| 2843 ciKlass* tinst_klass = tinst->klass(); | |
| 2844 ciKlass* this_klass = this->klass(); | |
| 2845 bool tinst_xk = tinst->klass_is_exact(); | |
| 2846 bool this_xk = this->klass_is_exact(); | |
| 2847 if (!tinst_klass->is_loaded() || !this_klass->is_loaded() ) { | |
| 2848 // One of these classes has not been loaded | |
| 2849 const TypeInstPtr *unloaded_meet = xmeet_unloaded(tinst); | |
| 2850 #ifndef PRODUCT | |
| 2851 if( PrintOpto && Verbose ) { | |
| 2852 tty->print("meet of unloaded classes resulted in: "); unloaded_meet->dump(); tty->cr(); | |
| 2853 tty->print(" this == "); this->dump(); tty->cr(); | |
| 2854 tty->print(" tinst == "); tinst->dump(); tty->cr(); | |
| 2855 } | |
| 2856 #endif | |
| 2857 return unloaded_meet; | |
| 2858 } | |
| 2859 | |
| 2860 // Handle mixing oops and interfaces first. | |
| 2861 if( this_klass->is_interface() && !tinst_klass->is_interface() ) { | |
| 2862 ciKlass *tmp = tinst_klass; // Swap interface around | |
| 2863 tinst_klass = this_klass; | |
| 2864 this_klass = tmp; | |
| 2865 bool tmp2 = tinst_xk; | |
| 2866 tinst_xk = this_xk; | |
| 2867 this_xk = tmp2; | |
| 2868 } | |
| 2869 if (tinst_klass->is_interface() && | |
| 2870 !(this_klass->is_interface() || | |
| 2871 // Treat java/lang/Object as an honorary interface, | |
| 2872 // because we need a bottom for the interface hierarchy. | |
| 2873 this_klass == ciEnv::current()->Object_klass())) { | |
| 2874 // Oop meets interface! | |
| 2875 | |
| 2876 // See if the oop subtypes (implements) interface. | |
| 2877 ciKlass *k; | |
| 2878 bool xk; | |
| 2879 if( this_klass->is_subtype_of( tinst_klass ) ) { | |
| 2880 // Oop indeed subtypes. Now keep oop or interface depending | |
| 2881 // on whether we are both above the centerline or either is | |
| 2882 // below the centerline. If we are on the centerline | |
| 2883 // (e.g., Constant vs. AnyNull interface), use the constant. | |
| 2884 k = below_centerline(ptr) ? tinst_klass : this_klass; | |
| 2885 // If we are keeping this_klass, keep its exactness too. | |
| 2886 xk = below_centerline(ptr) ? tinst_xk : this_xk; | |
| 2887 } else { // Does not implement, fall to Object | |
| 2888 // Oop does not implement interface, so mixing falls to Object | |
| 2889 // just like the verifier does (if both are above the | |
| 2890 // centerline fall to interface) | |
| 2891 k = above_centerline(ptr) ? tinst_klass : ciEnv::current()->Object_klass(); | |
| 2892 xk = above_centerline(ptr) ? tinst_xk : false; | |
| 2893 // Watch out for Constant vs. AnyNull interface. | |
| 2894 if (ptr == Constant) ptr = NotNull; // forget it was a constant | |
| 247 | 2895 instance_id = InstanceBot; |
| 0 | 2896 } |
| 2897 ciObject* o = NULL; // the Constant value, if any | |
| 2898 if (ptr == Constant) { | |
| 2899 // Find out which constant. | |
| 2900 o = (this_klass == klass()) ? const_oop() : tinst->const_oop(); | |
| 2901 } | |
| 223 | 2902 return make( ptr, k, xk, o, off, instance_id ); |
| 0 | 2903 } |
| 2904 | |
| 2905 // Either oop vs oop or interface vs interface or interface vs Object | |
| 2906 | |
| 2907 // !!! Here's how the symmetry requirement breaks down into invariants: | |
| 2908 // If we split one up & one down AND they subtype, take the down man. | |
| 2909 // If we split one up & one down AND they do NOT subtype, "fall hard". | |
| 2910 // If both are up and they subtype, take the subtype class. | |
| 2911 // If both are up and they do NOT subtype, "fall hard". | |
| 2912 // If both are down and they subtype, take the supertype class. | |
| 2913 // If both are down and they do NOT subtype, "fall hard". | |
| 2914 // Constants treated as down. | |
| 2915 | |
| 2916 // Now, reorder the above list; observe that both-down+subtype is also | |
| 2917 // "fall hard"; "fall hard" becomes the default case: | |
| 2918 // If we split one up & one down AND they subtype, take the down man. | |
| 2919 // If both are up and they subtype, take the subtype class. | |
| 2920 | |
| 2921 // If both are down and they subtype, "fall hard". | |
| 2922 // If both are down and they do NOT subtype, "fall hard". | |
| 2923 // If both are up and they do NOT subtype, "fall hard". | |
| 2924 // If we split one up & one down AND they do NOT subtype, "fall hard". | |
| 2925 | |
| 2926 // If a proper subtype is exact, and we return it, we return it exactly. | |
| 2927 // If a proper supertype is exact, there can be no subtyping relationship! | |
| 2928 // If both types are equal to the subtype, exactness is and-ed below the | |
| 2929 // centerline and or-ed above it. (N.B. Constants are always exact.) | |
| 2930 | |
| 2931 // Check for subtyping: | |
| 2932 ciKlass *subtype = NULL; | |
| 2933 bool subtype_exact = false; | |
| 2934 if( tinst_klass->equals(this_klass) ) { | |
| 2935 subtype = this_klass; | |
| 2936 subtype_exact = below_centerline(ptr) ? (this_xk & tinst_xk) : (this_xk | tinst_xk); | |
| 2937 } else if( !tinst_xk && this_klass->is_subtype_of( tinst_klass ) ) { | |
| 2938 subtype = this_klass; // Pick subtyping class | |
| 2939 subtype_exact = this_xk; | |
| 2940 } else if( !this_xk && tinst_klass->is_subtype_of( this_klass ) ) { | |
| 2941 subtype = tinst_klass; // Pick subtyping class | |
| 2942 subtype_exact = tinst_xk; | |
| 2943 } | |
| 2944 | |
| 2945 if( subtype ) { | |
| 2946 if( above_centerline(ptr) ) { // both are up? | |
| 2947 this_klass = tinst_klass = subtype; | |
| 2948 this_xk = tinst_xk = subtype_exact; | |
| 2949 } else if( above_centerline(this ->_ptr) && !above_centerline(tinst->_ptr) ) { | |
| 2950 this_klass = tinst_klass; // tinst is down; keep down man | |
| 2951 this_xk = tinst_xk; | |
| 2952 } else if( above_centerline(tinst->_ptr) && !above_centerline(this ->_ptr) ) { | |
| 2953 tinst_klass = this_klass; // this is down; keep down man | |
| 2954 tinst_xk = this_xk; | |
| 2955 } else { | |
| 2956 this_xk = subtype_exact; // either they are equal, or we'll do an LCA | |
| 2957 } | |
| 2958 } | |
| 2959 | |
| 2960 // Check for classes now being equal | |
| 2961 if (tinst_klass->equals(this_klass)) { | |
| 2962 // If the klasses are equal, the constants may still differ. Fall to | |
| 2963 // NotNull if they do (neither constant is NULL; that is a special case | |
| 2964 // handled elsewhere). | |
| 2965 ciObject* o = NULL; // Assume not constant when done | |
| 2966 ciObject* this_oop = const_oop(); | |
| 2967 ciObject* tinst_oop = tinst->const_oop(); | |
| 2968 if( ptr == Constant ) { | |
| 2969 if (this_oop != NULL && tinst_oop != NULL && | |
| 2970 this_oop->equals(tinst_oop) ) | |
| 2971 o = this_oop; | |
| 2972 else if (above_centerline(this ->_ptr)) | |
| 2973 o = tinst_oop; | |
| 2974 else if (above_centerline(tinst ->_ptr)) | |
| 2975 o = this_oop; | |
| 2976 else | |
| 2977 ptr = NotNull; | |
| 2978 } | |
| 2979 return make( ptr, this_klass, this_xk, o, off, instance_id ); | |
| 2980 } // Else classes are not equal | |
| 2981 | |
| 2982 // Since klasses are different, we require a LCA in the Java | |
| 2983 // class hierarchy - which means we have to fall to at least NotNull. | |
| 2984 if( ptr == TopPTR || ptr == AnyNull || ptr == Constant ) | |
| 2985 ptr = NotNull; | |
| 247 | 2986 instance_id = InstanceBot; |
| 0 | 2987 |
| 2988 // Now we find the LCA of Java classes | |
| 2989 ciKlass* k = this_klass->least_common_ancestor(tinst_klass); | |
| 223 | 2990 return make( ptr, k, false, NULL, off, instance_id ); |
| 0 | 2991 } // End of case InstPtr |
| 2992 | |
| 2993 case KlassPtr: | |
| 2994 return TypeInstPtr::BOTTOM; | |
| 2995 | |
| 2996 } // End of switch | |
| 2997 return this; // Return the double constant | |
| 2998 } | |
| 2999 | |
| 3000 | |
| 3001 //------------------------java_mirror_type-------------------------------------- | |
| 3002 ciType* TypeInstPtr::java_mirror_type() const { | |
| 3003 // must be a singleton type | |
| 3004 if( const_oop() == NULL ) return NULL; | |
| 3005 | |
| 3006 // must be of type java.lang.Class | |
| 3007 if( klass() != ciEnv::current()->Class_klass() ) return NULL; | |
| 3008 | |
| 3009 return const_oop()->as_instance()->java_mirror_type(); | |
| 3010 } | |
| 3011 | |
| 3012 | |
| 3013 //------------------------------xdual------------------------------------------ | |
| 3014 // Dual: do NOT dual on klasses. This means I do NOT understand the Java | |
| 3015 // inheritence mechanism. | |
| 3016 const Type *TypeInstPtr::xdual() const { | |
| 223 | 3017 return new TypeInstPtr( dual_ptr(), klass(), klass_is_exact(), const_oop(), dual_offset(), dual_instance_id() ); |
| 0 | 3018 } |
| 3019 | |
| 3020 //------------------------------eq--------------------------------------------- | |
| 3021 // Structural equality check for Type representations | |
| 3022 bool TypeInstPtr::eq( const Type *t ) const { | |
| 3023 const TypeInstPtr *p = t->is_instptr(); | |
| 3024 return | |
| 3025 klass()->equals(p->klass()) && | |
| 3026 TypeOopPtr::eq(p); // Check sub-type stuff | |
| 3027 } | |
| 3028 | |
| 3029 //------------------------------hash------------------------------------------- | |
| 3030 // Type-specific hashing function. | |
| 3031 int TypeInstPtr::hash(void) const { | |
| 3032 int hash = klass()->hash() + TypeOopPtr::hash(); | |
| 3033 return hash; | |
| 3034 } | |
| 3035 | |
| 3036 //------------------------------dump2------------------------------------------ | |
| 3037 // Dump oop Type | |
| 3038 #ifndef PRODUCT | |
| 3039 void TypeInstPtr::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 3040 // Print the name of the klass. | |
| 3041 klass()->print_name_on(st); | |
| 3042 | |
| 3043 switch( _ptr ) { | |
| 3044 case Constant: | |
| 3045 // TO DO: Make CI print the hex address of the underlying oop. | |
| 3046 if (WizardMode || Verbose) { | |
| 3047 const_oop()->print_oop(st); | |
| 3048 } | |
| 3049 case BotPTR: | |
| 3050 if (!WizardMode && !Verbose) { | |
| 3051 if( _klass_is_exact ) st->print(":exact"); | |
| 3052 break; | |
| 3053 } | |
| 3054 case TopPTR: | |
| 3055 case AnyNull: | |
| 3056 case NotNull: | |
| 3057 st->print(":%s", ptr_msg[_ptr]); | |
| 3058 if( _klass_is_exact ) st->print(":exact"); | |
| 3059 break; | |
| 3060 } | |
| 3061 | |
| 3062 if( _offset ) { // Dump offset, if any | |
| 3063 if( _offset == OffsetBot ) st->print("+any"); | |
| 3064 else if( _offset == OffsetTop ) st->print("+unknown"); | |
| 3065 else st->print("+%d", _offset); | |
| 3066 } | |
| 3067 | |
| 3068 st->print(" *"); | |
| 223 | 3069 if (_instance_id == InstanceTop) |
| 3070 st->print(",iid=top"); | |
| 3071 else if (_instance_id != InstanceBot) | |
| 0 | 3072 st->print(",iid=%d",_instance_id); |
| 3073 } | |
| 3074 #endif | |
| 3075 | |
| 3076 //------------------------------add_offset------------------------------------- | |
|
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3077 const TypePtr *TypeInstPtr::add_offset( intptr_t offset ) const { |
| 0 | 3078 return make( _ptr, klass(), klass_is_exact(), const_oop(), xadd_offset(offset), _instance_id ); |
| 3079 } | |
| 3080 | |
| 3081 //============================================================================= | |
| 3082 // Convenience common pre-built types. | |
| 3083 const TypeAryPtr *TypeAryPtr::RANGE; | |
| 3084 const TypeAryPtr *TypeAryPtr::OOPS; | |
| 163 | 3085 const TypeAryPtr *TypeAryPtr::NARROWOOPS; |
| 0 | 3086 const TypeAryPtr *TypeAryPtr::BYTES; |
| 3087 const TypeAryPtr *TypeAryPtr::SHORTS; | |
| 3088 const TypeAryPtr *TypeAryPtr::CHARS; | |
| 3089 const TypeAryPtr *TypeAryPtr::INTS; | |
| 3090 const TypeAryPtr *TypeAryPtr::LONGS; | |
| 3091 const TypeAryPtr *TypeAryPtr::FLOATS; | |
| 3092 const TypeAryPtr *TypeAryPtr::DOUBLES; | |
| 3093 | |
| 3094 //------------------------------make------------------------------------------- | |
| 3095 const TypeAryPtr *TypeAryPtr::make( PTR ptr, const TypeAry *ary, ciKlass* k, bool xk, int offset, int instance_id ) { | |
| 3096 assert(!(k == NULL && ary->_elem->isa_int()), | |
| 3097 "integral arrays must be pre-equipped with a class"); | |
| 3098 if (!xk) xk = ary->ary_must_be_exact(); | |
| 247 | 3099 assert(instance_id <= 0 || xk || !UseExactTypes, "instances are always exactly typed"); |
| 0 | 3100 if (!UseExactTypes) xk = (ptr == Constant); |
| 3101 return (TypeAryPtr*)(new TypeAryPtr(ptr, NULL, ary, k, xk, offset, instance_id))->hashcons(); | |
| 3102 } | |
| 3103 | |
| 3104 //------------------------------make------------------------------------------- | |
| 3105 const TypeAryPtr *TypeAryPtr::make( PTR ptr, ciObject* o, 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 assert( (ptr==Constant && o) || (ptr!=Constant && !o), "" ); | |
| 3109 if (!xk) xk = (o != NULL) || ary->ary_must_be_exact(); | |
| 247 | 3110 assert(instance_id <= 0 || xk || !UseExactTypes, "instances are always exactly typed"); |
| 0 | 3111 if (!UseExactTypes) xk = (ptr == Constant); |
| 3112 return (TypeAryPtr*)(new TypeAryPtr(ptr, o, ary, k, xk, offset, instance_id))->hashcons(); | |
| 3113 } | |
| 3114 | |
| 3115 //------------------------------cast_to_ptr_type------------------------------- | |
| 3116 const Type *TypeAryPtr::cast_to_ptr_type(PTR ptr) const { | |
| 3117 if( ptr == _ptr ) return this; | |
| 223 | 3118 return make(ptr, const_oop(), _ary, klass(), klass_is_exact(), _offset, _instance_id); |
| 0 | 3119 } |
| 3120 | |
| 3121 | |
| 3122 //-----------------------------cast_to_exactness------------------------------- | |
| 3123 const Type *TypeAryPtr::cast_to_exactness(bool klass_is_exact) const { | |
| 3124 if( klass_is_exact == _klass_is_exact ) return this; | |
| 3125 if (!UseExactTypes) return this; | |
| 3126 if (_ary->ary_must_be_exact()) return this; // cannot clear xk | |
| 3127 return make(ptr(), const_oop(), _ary, klass(), klass_is_exact, _offset, _instance_id); | |
| 3128 } | |
| 3129 | |
| 247 | 3130 //-----------------------------cast_to_instance_id---------------------------- |
| 223 | 3131 const TypeOopPtr *TypeAryPtr::cast_to_instance_id(int instance_id) const { |
| 3132 if( instance_id == _instance_id ) return this; | |
| 247 | 3133 return make(_ptr, const_oop(), _ary, klass(), _klass_is_exact, _offset, instance_id); |
| 0 | 3134 } |
| 3135 | |
| 3136 //-----------------------------narrow_size_type------------------------------- | |
| 3137 // Local cache for arrayOopDesc::max_array_length(etype), | |
| 3138 // which is kind of slow (and cached elsewhere by other users). | |
| 3139 static jint max_array_length_cache[T_CONFLICT+1]; | |
| 3140 static jint max_array_length(BasicType etype) { | |
| 3141 jint& cache = max_array_length_cache[etype]; | |
| 3142 jint res = cache; | |
| 3143 if (res == 0) { | |
| 3144 switch (etype) { | |
|
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3145 case T_NARROWOOP: |
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3146 etype = T_OBJECT; |
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3147 break; |
| 0 | 3148 case T_CONFLICT: |
| 3149 case T_ILLEGAL: | |
| 3150 case T_VOID: | |
| 3151 etype = T_BYTE; // will produce conservatively high value | |
| 3152 } | |
| 3153 cache = res = arrayOopDesc::max_array_length(etype); | |
| 3154 } | |
| 3155 return res; | |
| 3156 } | |
| 3157 | |
| 3158 // Narrow the given size type to the index range for the given array base type. | |
| 3159 // Return NULL if the resulting int type becomes empty. | |
| 3160 const TypeInt* TypeAryPtr::narrow_size_type(const TypeInt* size, BasicType elem) { | |
| 3161 jint hi = size->_hi; | |
| 3162 jint lo = size->_lo; | |
| 3163 jint min_lo = 0; | |
| 3164 jint max_hi = max_array_length(elem); | |
| 3165 //if (index_not_size) --max_hi; // type of a valid array index, FTR | |
| 3166 bool chg = false; | |
| 3167 if (lo < min_lo) { lo = min_lo; chg = true; } | |
| 3168 if (hi > max_hi) { hi = max_hi; chg = true; } | |
| 3169 if (lo > hi) | |
| 3170 return NULL; | |
| 3171 if (!chg) | |
| 3172 return size; | |
| 3173 return TypeInt::make(lo, hi, Type::WidenMin); | |
| 3174 } | |
| 3175 | |
| 3176 //-------------------------------cast_to_size---------------------------------- | |
| 3177 const TypeAryPtr* TypeAryPtr::cast_to_size(const TypeInt* new_size) const { | |
| 3178 assert(new_size != NULL, ""); | |
| 3179 new_size = narrow_size_type(new_size, elem()->basic_type()); | |
| 3180 if (new_size == NULL) // Negative length arrays will produce weird | |
| 3181 new_size = TypeInt::ZERO; // intermediate dead fast-path goo | |
| 3182 if (new_size == size()) return this; | |
| 3183 const TypeAry* new_ary = TypeAry::make(elem(), new_size); | |
| 223 | 3184 return make(ptr(), const_oop(), new_ary, klass(), klass_is_exact(), _offset, _instance_id); |
| 0 | 3185 } |
| 3186 | |
| 3187 | |
| 3188 //------------------------------eq--------------------------------------------- | |
| 3189 // Structural equality check for Type representations | |
| 3190 bool TypeAryPtr::eq( const Type *t ) const { | |
| 3191 const TypeAryPtr *p = t->is_aryptr(); | |
| 3192 return | |
| 3193 _ary == p->_ary && // Check array | |
| 3194 TypeOopPtr::eq(p); // Check sub-parts | |
| 3195 } | |
| 3196 | |
| 3197 //------------------------------hash------------------------------------------- | |
| 3198 // Type-specific hashing function. | |
| 3199 int TypeAryPtr::hash(void) const { | |
| 3200 return (intptr_t)_ary + TypeOopPtr::hash(); | |
| 3201 } | |
| 3202 | |
| 3203 //------------------------------meet------------------------------------------- | |
| 3204 // Compute the MEET of two types. It returns a new Type object. | |
| 3205 const Type *TypeAryPtr::xmeet( const Type *t ) const { | |
| 3206 // Perform a fast test for common case; meeting the same types together. | |
| 3207 if( this == t ) return this; // Meeting same type-rep? | |
| 3208 // Current "this->_base" is Pointer | |
| 3209 switch (t->base()) { // switch on original type | |
| 3210 | |
| 3211 // Mixing ints & oops happens when javac reuses local variables | |
| 3212 case Int: | |
| 3213 case Long: | |
| 3214 case FloatTop: | |
| 3215 case FloatCon: | |
| 3216 case FloatBot: | |
| 3217 case DoubleTop: | |
| 3218 case DoubleCon: | |
| 3219 case DoubleBot: | |
|
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3220 case NarrowOop: |
| 0 | 3221 case Bottom: // Ye Olde Default |
| 3222 return Type::BOTTOM; | |
| 3223 case Top: | |
| 3224 return this; | |
| 3225 | |
| 3226 default: // All else is a mistake | |
| 3227 typerr(t); | |
| 3228 | |
| 3229 case OopPtr: { // Meeting to OopPtrs | |
| 3230 // Found a OopPtr type vs self-AryPtr type | |
| 3231 const TypePtr *tp = t->is_oopptr(); | |
| 3232 int offset = meet_offset(tp->offset()); | |
| 3233 PTR ptr = meet_ptr(tp->ptr()); | |
| 3234 switch (tp->ptr()) { | |
| 3235 case TopPTR: | |
| 223 | 3236 case AnyNull: { |
| 3237 int instance_id = meet_instance_id(InstanceTop); | |
| 3238 return make(ptr, (ptr == Constant ? const_oop() : NULL), | |
| 3239 _ary, _klass, _klass_is_exact, offset, instance_id); | |
| 3240 } | |
| 0 | 3241 case BotPTR: |
| 3242 case NotNull: | |
| 3243 return TypeOopPtr::make(ptr, offset); | |
| 3244 default: ShouldNotReachHere(); | |
| 3245 } | |
| 3246 } | |
| 3247 | |
| 3248 case AnyPtr: { // Meeting two AnyPtrs | |
| 3249 // Found an AnyPtr type vs self-AryPtr type | |
| 3250 const TypePtr *tp = t->is_ptr(); | |
| 3251 int offset = meet_offset(tp->offset()); | |
| 3252 PTR ptr = meet_ptr(tp->ptr()); | |
| 3253 switch (tp->ptr()) { | |
| 3254 case TopPTR: | |
| 3255 return this; | |
| 3256 case BotPTR: | |
| 3257 case NotNull: | |
| 3258 return TypePtr::make(AnyPtr, ptr, offset); | |
| 3259 case Null: | |
| 3260 if( ptr == Null ) return TypePtr::make(AnyPtr, ptr, offset); | |
| 223 | 3261 // else fall through to AnyNull |
| 3262 case AnyNull: { | |
| 3263 int instance_id = meet_instance_id(InstanceTop); | |
| 3264 return make( ptr, (ptr == Constant ? const_oop() : NULL), | |
| 3265 _ary, _klass, _klass_is_exact, offset, instance_id); | |
| 3266 } | |
| 0 | 3267 default: ShouldNotReachHere(); |
| 3268 } | |
| 3269 } | |
| 3270 | |
| 3271 case RawPtr: return TypePtr::BOTTOM; | |
| 3272 | |
| 3273 case AryPtr: { // Meeting 2 references? | |
| 3274 const TypeAryPtr *tap = t->is_aryptr(); | |
| 3275 int off = meet_offset(tap->offset()); | |
| 3276 const TypeAry *tary = _ary->meet(tap->_ary)->is_ary(); | |
| 3277 PTR ptr = meet_ptr(tap->ptr()); | |
| 223 | 3278 int instance_id = meet_instance_id(tap->instance_id()); |
| 0 | 3279 ciKlass* lazy_klass = NULL; |
| 3280 if (tary->_elem->isa_int()) { | |
| 3281 // Integral array element types have irrelevant lattice relations. | |
| 3282 // It is the klass that determines array layout, not the element type. | |
| 3283 if (_klass == NULL) | |
| 3284 lazy_klass = tap->_klass; | |
| 3285 else if (tap->_klass == NULL || tap->_klass == _klass) { | |
| 3286 lazy_klass = _klass; | |
| 3287 } else { | |
| 3288 // Something like byte[int+] meets char[int+]. | |
| 3289 // This must fall to bottom, not (int[-128..65535])[int+]. | |
| 247 | 3290 instance_id = InstanceBot; |
| 0 | 3291 tary = TypeAry::make(Type::BOTTOM, tary->_size); |
| 3292 } | |
| 3293 } | |
| 3294 bool xk; | |
| 3295 switch (tap->ptr()) { | |
| 3296 case AnyNull: | |
| 3297 case TopPTR: | |
| 3298 // Compute new klass on demand, do not use tap->_klass | |
| 3299 xk = (tap->_klass_is_exact | this->_klass_is_exact); | |
| 223 | 3300 return make( ptr, const_oop(), tary, lazy_klass, xk, off, instance_id ); |
| 0 | 3301 case Constant: { |
| 3302 ciObject* o = const_oop(); | |
| 3303 if( _ptr == Constant ) { | |
| 3304 if( tap->const_oop() != NULL && !o->equals(tap->const_oop()) ) { | |
| 3305 ptr = NotNull; | |
| 3306 o = NULL; | |
| 247 | 3307 instance_id = InstanceBot; |
| 0 | 3308 } |
| 3309 } else if( above_centerline(_ptr) ) { | |
| 3310 o = tap->const_oop(); | |
| 3311 } | |
| 3312 xk = true; | |
| 223 | 3313 return TypeAryPtr::make( ptr, o, tary, tap->_klass, xk, off, instance_id ); |
| 0 | 3314 } |
| 3315 case NotNull: | |
| 3316 case BotPTR: | |
| 3317 // Compute new klass on demand, do not use tap->_klass | |
| 3318 if (above_centerline(this->_ptr)) | |
| 3319 xk = tap->_klass_is_exact; | |
| 3320 else if (above_centerline(tap->_ptr)) | |
| 3321 xk = this->_klass_is_exact; | |
| 3322 else xk = (tap->_klass_is_exact & this->_klass_is_exact) && | |
| 3323 (klass() == tap->klass()); // Only precise for identical arrays | |
| 223 | 3324 return TypeAryPtr::make( ptr, NULL, tary, lazy_klass, xk, off, instance_id ); |
| 0 | 3325 default: ShouldNotReachHere(); |
| 3326 } | |
| 3327 } | |
| 3328 | |
| 3329 // All arrays inherit from Object class | |
| 3330 case InstPtr: { | |
| 3331 const TypeInstPtr *tp = t->is_instptr(); | |
| 3332 int offset = meet_offset(tp->offset()); | |
| 3333 PTR ptr = meet_ptr(tp->ptr()); | |
| 223 | 3334 int instance_id = meet_instance_id(tp->instance_id()); |
| 0 | 3335 switch (ptr) { |
| 3336 case TopPTR: | |
| 3337 case AnyNull: // Fall 'down' to dual of object klass | |
| 3338 if( tp->klass()->equals(ciEnv::current()->Object_klass()) ) { | |
| 223 | 3339 return TypeAryPtr::make( ptr, _ary, _klass, _klass_is_exact, offset, instance_id ); |
| 0 | 3340 } else { |
| 3341 // cannot subclass, so the meet has to fall badly below the centerline | |
| 3342 ptr = NotNull; | |
| 223 | 3343 instance_id = InstanceBot; |
| 3344 return TypeInstPtr::make( ptr, ciEnv::current()->Object_klass(), false, NULL,offset, instance_id); | |
| 0 | 3345 } |
| 3346 case Constant: | |
| 3347 case NotNull: | |
| 3348 case BotPTR: // Fall down to object klass | |
| 3349 // LCA is object_klass, but if we subclass from the top we can do better | |
| 3350 if (above_centerline(tp->ptr())) { | |
| 3351 // If 'tp' is above the centerline and it is Object class | |
| 3352 // then we can subclass in the Java class heirarchy. | |
| 3353 if( tp->klass()->equals(ciEnv::current()->Object_klass()) ) { | |
| 3354 // that is, my array type is a subtype of 'tp' klass | |
| 223 | 3355 return make( ptr, _ary, _klass, _klass_is_exact, offset, instance_id ); |
| 0 | 3356 } |
| 3357 } | |
| 3358 // The other case cannot happen, since t cannot be a subtype of an array. | |
| 3359 // The meet falls down to Object class below centerline. | |
| 3360 if( ptr == Constant ) | |
| 3361 ptr = NotNull; | |
| 223 | 3362 instance_id = InstanceBot; |
| 3363 return TypeInstPtr::make( ptr, ciEnv::current()->Object_klass(), false, NULL,offset, instance_id); | |
| 0 | 3364 default: typerr(t); |
| 3365 } | |
| 3366 } | |
| 3367 | |
| 3368 case KlassPtr: | |
| 3369 return TypeInstPtr::BOTTOM; | |
| 3370 | |
| 3371 } | |
| 3372 return this; // Lint noise | |
| 3373 } | |
| 3374 | |
| 3375 //------------------------------xdual------------------------------------------ | |
| 3376 // Dual: compute field-by-field dual | |
| 3377 const Type *TypeAryPtr::xdual() const { | |
| 223 | 3378 return new TypeAryPtr( dual_ptr(), _const_oop, _ary->dual()->is_ary(),_klass, _klass_is_exact, dual_offset(), dual_instance_id() ); |
| 0 | 3379 } |
| 3380 | |
| 3381 //------------------------------dump2------------------------------------------ | |
| 3382 #ifndef PRODUCT | |
| 3383 void TypeAryPtr::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 3384 _ary->dump2(d,depth,st); | |
| 3385 switch( _ptr ) { | |
| 3386 case Constant: | |
| 3387 const_oop()->print(st); | |
| 3388 break; | |
| 3389 case BotPTR: | |
| 3390 if (!WizardMode && !Verbose) { | |
| 3391 if( _klass_is_exact ) st->print(":exact"); | |
| 3392 break; | |
| 3393 } | |
| 3394 case TopPTR: | |
| 3395 case AnyNull: | |
| 3396 case NotNull: | |
| 3397 st->print(":%s", ptr_msg[_ptr]); | |
| 3398 if( _klass_is_exact ) st->print(":exact"); | |
| 3399 break; | |
| 3400 } | |
| 3401 | |
|
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3402 if( _offset != 0 ) { |
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3403 int header_size = objArrayOopDesc::header_size() * wordSize; |
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3404 if( _offset == OffsetTop ) st->print("+undefined"); |
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3405 else if( _offset == OffsetBot ) st->print("+any"); |
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3406 else if( _offset < header_size ) st->print("+%d", _offset); |
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3407 else { |
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3408 BasicType basic_elem_type = elem()->basic_type(); |
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3409 int array_base = arrayOopDesc::base_offset_in_bytes(basic_elem_type); |
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3410 int elem_size = type2aelembytes(basic_elem_type); |
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3411 st->print("[%d]", (_offset - array_base)/elem_size); |
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3412 } |
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3413 } |
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3414 st->print(" *"); |
| 223 | 3415 if (_instance_id == InstanceTop) |
| 3416 st->print(",iid=top"); | |
| 3417 else if (_instance_id != InstanceBot) | |
| 0 | 3418 st->print(",iid=%d",_instance_id); |
| 3419 } | |
| 3420 #endif | |
| 3421 | |
| 3422 bool TypeAryPtr::empty(void) const { | |
| 3423 if (_ary->empty()) return true; | |
| 3424 return TypeOopPtr::empty(); | |
| 3425 } | |
| 3426 | |
| 3427 //------------------------------add_offset------------------------------------- | |
|
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3428 const TypePtr *TypeAryPtr::add_offset( intptr_t offset ) const { |
| 0 | 3429 return make( _ptr, _const_oop, _ary, _klass, _klass_is_exact, xadd_offset(offset), _instance_id ); |
| 3430 } | |
| 3431 | |
| 3432 | |
| 3433 //============================================================================= | |
|
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3434 const TypeNarrowOop *TypeNarrowOop::BOTTOM; |
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3435 const TypeNarrowOop *TypeNarrowOop::NULL_PTR; |
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3436 |
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3437 |
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3438 const TypeNarrowOop* TypeNarrowOop::make(const TypePtr* type) { |
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3439 return (const TypeNarrowOop*)(new TypeNarrowOop(type))->hashcons(); |
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3440 } |
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3441 |
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3442 //------------------------------hash------------------------------------------- |
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3443 // Type-specific hashing function. |
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3444 int TypeNarrowOop::hash(void) const { |
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3445 return _ooptype->hash() + 7; |
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3446 } |
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3447 |
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3448 |
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3449 bool TypeNarrowOop::eq( const Type *t ) const { |
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3450 const TypeNarrowOop* tc = t->isa_narrowoop(); |
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3451 if (tc != NULL) { |
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3452 if (_ooptype->base() != tc->_ooptype->base()) { |
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3453 return false; |
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3454 } |
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3455 return tc->_ooptype->eq(_ooptype); |
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3456 } |
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3457 return false; |
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3458 } |
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3459 |
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3460 bool TypeNarrowOop::singleton(void) const { // TRUE if type is a singleton |
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3461 return _ooptype->singleton(); |
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3462 } |
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3463 |
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3464 bool TypeNarrowOop::empty(void) const { |
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3465 return _ooptype->empty(); |
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3466 } |
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3467 |
|
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|
3468 //------------------------------xmeet------------------------------------------ |
|
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3469 // Compute the MEET of two types. It returns a new Type object. |
|
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|
3470 const Type *TypeNarrowOop::xmeet( const Type *t ) const { |
|
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3471 // Perform a fast test for common case; meeting the same types together. |
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3472 if( this == t ) return this; // Meeting same type-rep? |
|
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3473 |
|
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|
3474 |
|
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|
3475 // Current "this->_base" is OopPtr |
|
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|
3476 switch (t->base()) { // switch on original type |
|
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3477 |
|
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|
3478 case Int: // Mixing ints & oops happens when javac |
|
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3479 case Long: // reuses local variables |
|
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|
3480 case FloatTop: |
|
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3481 case FloatCon: |
|
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3482 case FloatBot: |
|
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3483 case DoubleTop: |
|
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3484 case DoubleCon: |
|
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|
3485 case DoubleBot: |
|
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3486 case AnyPtr: |
|
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3487 case RawPtr: |
|
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3488 case OopPtr: |
|
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|
3489 case InstPtr: |
|
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|
3490 case KlassPtr: |
|
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|
3491 case AryPtr: |
|
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|
3492 |
|
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|
3493 case Bottom: // Ye Olde Default |
|
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|
3494 return Type::BOTTOM; |
|
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|
3495 case Top: |
|
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|
3496 return this; |
|
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|
3497 |
|
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|
3498 case NarrowOop: { |
|
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|
3499 const Type* result = _ooptype->xmeet(t->make_ptr()); |
|
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|
3500 if (result->isa_ptr()) { |
|
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|
3501 return TypeNarrowOop::make(result->is_ptr()); |
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|
3502 } |
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|
3503 return result; |
|
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|
3504 } |
|
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|
3505 |
|
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|
3506 default: // All else is a mistake |
|
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|
3507 typerr(t); |
|
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|
3508 |
|
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|
3509 } // End of switch |
|
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|
3510 |
|
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|
3511 return this; |
|
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|
3512 } |
|
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|
3513 |
|
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|
3514 const Type *TypeNarrowOop::xdual() const { // Compute dual right now. |
|
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|
3515 const TypePtr* odual = _ooptype->dual()->is_ptr(); |
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|
3516 return new TypeNarrowOop(odual); |
|
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|
3517 } |
|
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|
3518 |
|
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|
3519 const Type *TypeNarrowOop::filter( const Type *kills ) const { |
|
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|
3520 if (kills->isa_narrowoop()) { |
|
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|
3521 const Type* ft =_ooptype->filter(kills->is_narrowoop()->_ooptype); |
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|
3522 if (ft->empty()) |
|
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|
3523 return Type::TOP; // Canonical empty value |
|
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|
3524 if (ft->isa_ptr()) { |
|
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|
3525 return make(ft->isa_ptr()); |
|
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|
3526 } |
|
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|
3527 return ft; |
|
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|
3528 } else if (kills->isa_ptr()) { |
|
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|
3529 const Type* ft = _ooptype->join(kills); |
|
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|
3530 if (ft->empty()) |
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|
3531 return Type::TOP; // Canonical empty value |
|
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|
3532 return ft; |
|
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|
3533 } else { |
|
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|
3534 return Type::TOP; |
|
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|
3535 } |
|
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|
3536 } |
|
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|
3537 |
|
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|
3538 |
|
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|
3539 intptr_t TypeNarrowOop::get_con() const { |
|
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|
3540 return _ooptype->get_con(); |
|
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|
3541 } |
|
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|
3542 |
|
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|
3543 #ifndef PRODUCT |
|
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|
3544 void TypeNarrowOop::dump2( Dict & d, uint depth, outputStream *st ) const { |
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|
3545 tty->print("narrowoop: "); |
|
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|
3546 _ooptype->dump2(d, depth, st); |
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|
3547 } |
|
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|
3548 #endif |
|
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|
3549 |
|
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|
3550 |
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|
3551 //============================================================================= |
| 0 | 3552 // Convenience common pre-built types. |
| 3553 | |
| 3554 // Not-null object klass or below | |
| 3555 const TypeKlassPtr *TypeKlassPtr::OBJECT; | |
| 3556 const TypeKlassPtr *TypeKlassPtr::OBJECT_OR_NULL; | |
| 3557 | |
| 3558 //------------------------------TypeKlasPtr------------------------------------ | |
| 3559 TypeKlassPtr::TypeKlassPtr( PTR ptr, ciKlass* klass, int offset ) | |
| 3560 : TypeOopPtr(KlassPtr, ptr, klass, (ptr==Constant), (ptr==Constant ? klass : NULL), offset, 0) { | |
| 3561 } | |
| 3562 | |
| 3563 //------------------------------make------------------------------------------- | |
| 3564 // ptr to klass 'k', if Constant, or possibly to a sub-klass if not a Constant | |
| 3565 const TypeKlassPtr *TypeKlassPtr::make( PTR ptr, ciKlass* k, int offset ) { | |
| 3566 assert( k != NULL, "Expect a non-NULL klass"); | |
| 3567 assert(k->is_instance_klass() || k->is_array_klass() || | |
| 3568 k->is_method_klass(), "Incorrect type of klass oop"); | |
| 3569 TypeKlassPtr *r = | |
| 3570 (TypeKlassPtr*)(new TypeKlassPtr(ptr, k, offset))->hashcons(); | |
| 3571 | |
| 3572 return r; | |
| 3573 } | |
| 3574 | |
| 3575 //------------------------------eq--------------------------------------------- | |
| 3576 // Structural equality check for Type representations | |
| 3577 bool TypeKlassPtr::eq( const Type *t ) const { | |
| 3578 const TypeKlassPtr *p = t->is_klassptr(); | |
| 3579 return | |
| 3580 klass()->equals(p->klass()) && | |
| 3581 TypeOopPtr::eq(p); | |
| 3582 } | |
| 3583 | |
| 3584 //------------------------------hash------------------------------------------- | |
| 3585 // Type-specific hashing function. | |
| 3586 int TypeKlassPtr::hash(void) const { | |
| 3587 return klass()->hash() + TypeOopPtr::hash(); | |
| 3588 } | |
| 3589 | |
| 3590 | |
| 3591 //------------------------------klass------------------------------------------ | |
| 3592 // Return the defining klass for this class | |
| 3593 ciKlass* TypeAryPtr::klass() const { | |
| 3594 if( _klass ) return _klass; // Return cached value, if possible | |
| 3595 | |
| 3596 // Oops, need to compute _klass and cache it | |
| 3597 ciKlass* k_ary = NULL; | |
| 3598 const TypeInstPtr *tinst; | |
| 3599 const TypeAryPtr *tary; | |
|
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3600 const Type* el = elem(); |
|
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|
3601 if (el->isa_narrowoop()) { |
|
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3602 el = el->make_ptr(); |
|
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|
3603 } |
|
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3604 |
| 0 | 3605 // Get element klass |
|
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|
3606 if ((tinst = el->isa_instptr()) != NULL) { |
| 0 | 3607 // Compute array klass from element klass |
| 3608 k_ary = ciObjArrayKlass::make(tinst->klass()); | |
|
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|
3609 } else if ((tary = el->isa_aryptr()) != NULL) { |
| 0 | 3610 // Compute array klass from element klass |
| 3611 ciKlass* k_elem = tary->klass(); | |
| 3612 // If element type is something like bottom[], k_elem will be null. | |
| 3613 if (k_elem != NULL) | |
| 3614 k_ary = ciObjArrayKlass::make(k_elem); | |
|
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3615 } else if ((el->base() == Type::Top) || |
|
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|
3616 (el->base() == Type::Bottom)) { |
| 0 | 3617 // element type of Bottom occurs from meet of basic type |
| 3618 // and object; Top occurs when doing join on Bottom. | |
| 3619 // Leave k_ary at NULL. | |
| 3620 } else { | |
| 3621 // Cannot compute array klass directly from basic type, | |
| 3622 // since subtypes of TypeInt all have basic type T_INT. | |
|
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3623 assert(!el->isa_int(), |
| 0 | 3624 "integral arrays must be pre-equipped with a class"); |
| 3625 // Compute array klass directly from basic type | |
|
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|
3626 k_ary = ciTypeArrayKlass::make(el->basic_type()); |
| 0 | 3627 } |
| 3628 | |
| 163 | 3629 if( this != TypeAryPtr::OOPS ) { |
| 0 | 3630 // The _klass field acts as a cache of the underlying |
| 3631 // ciKlass for this array type. In order to set the field, | |
| 3632 // we need to cast away const-ness. | |
| 3633 // | |
| 3634 // IMPORTANT NOTE: we *never* set the _klass field for the | |
| 3635 // type TypeAryPtr::OOPS. This Type is shared between all | |
| 3636 // active compilations. However, the ciKlass which represents | |
| 3637 // this Type is *not* shared between compilations, so caching | |
| 3638 // this value would result in fetching a dangling pointer. | |
| 3639 // | |
| 3640 // Recomputing the underlying ciKlass for each request is | |
| 3641 // a bit less efficient than caching, but calls to | |
| 3642 // TypeAryPtr::OOPS->klass() are not common enough to matter. | |
| 3643 ((TypeAryPtr*)this)->_klass = k_ary; | |
| 163 | 3644 if (UseCompressedOops && k_ary != NULL && k_ary->is_obj_array_klass() && |
| 3645 _offset != 0 && _offset != arrayOopDesc::length_offset_in_bytes()) { | |
| 3646 ((TypeAryPtr*)this)->_is_ptr_to_narrowoop = true; | |
| 3647 } | |
| 3648 } | |
| 0 | 3649 return k_ary; |
| 3650 } | |
| 3651 | |
| 3652 | |
| 3653 //------------------------------add_offset------------------------------------- | |
| 3654 // Access internals of klass object | |
|
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3655 const TypePtr *TypeKlassPtr::add_offset( intptr_t offset ) const { |
| 0 | 3656 return make( _ptr, klass(), xadd_offset(offset) ); |
| 3657 } | |
| 3658 | |
| 3659 //------------------------------cast_to_ptr_type------------------------------- | |
| 3660 const Type *TypeKlassPtr::cast_to_ptr_type(PTR ptr) const { | |
| 3661 assert(_base == OopPtr, "subclass must override cast_to_ptr_type"); | |
| 3662 if( ptr == _ptr ) return this; | |
| 3663 return make(ptr, _klass, _offset); | |
| 3664 } | |
| 3665 | |
| 3666 | |
| 3667 //-----------------------------cast_to_exactness------------------------------- | |
| 3668 const Type *TypeKlassPtr::cast_to_exactness(bool klass_is_exact) const { | |
| 3669 if( klass_is_exact == _klass_is_exact ) return this; | |
| 3670 if (!UseExactTypes) return this; | |
| 3671 return make(klass_is_exact ? Constant : NotNull, _klass, _offset); | |
| 3672 } | |
| 3673 | |
| 3674 | |
| 3675 //-----------------------------as_instance_type-------------------------------- | |
| 3676 // Corresponding type for an instance of the given class. | |
| 3677 // It will be NotNull, and exact if and only if the klass type is exact. | |
| 3678 const TypeOopPtr* TypeKlassPtr::as_instance_type() const { | |
| 3679 ciKlass* k = klass(); | |
| 3680 bool xk = klass_is_exact(); | |
| 3681 //return TypeInstPtr::make(TypePtr::NotNull, k, xk, NULL, 0); | |
| 3682 const TypeOopPtr* toop = TypeOopPtr::make_from_klass_raw(k); | |
| 3683 toop = toop->cast_to_ptr_type(TypePtr::NotNull)->is_oopptr(); | |
| 3684 return toop->cast_to_exactness(xk)->is_oopptr(); | |
| 3685 } | |
| 3686 | |
| 3687 | |
| 3688 //------------------------------xmeet------------------------------------------ | |
| 3689 // Compute the MEET of two types, return a new Type object. | |
| 3690 const Type *TypeKlassPtr::xmeet( const Type *t ) const { | |
| 3691 // Perform a fast test for common case; meeting the same types together. | |
| 3692 if( this == t ) return this; // Meeting same type-rep? | |
| 3693 | |
| 3694 // Current "this->_base" is Pointer | |
| 3695 switch (t->base()) { // switch on original type | |
| 3696 | |
| 3697 case Int: // Mixing ints & oops happens when javac | |
| 3698 case Long: // reuses local variables | |
| 3699 case FloatTop: | |
| 3700 case FloatCon: | |
| 3701 case FloatBot: | |
| 3702 case DoubleTop: | |
| 3703 case DoubleCon: | |
| 3704 case DoubleBot: | |
|
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3705 case NarrowOop: |
| 0 | 3706 case Bottom: // Ye Olde Default |
| 3707 return Type::BOTTOM; | |
| 3708 case Top: | |
| 3709 return this; | |
| 3710 | |
| 3711 default: // All else is a mistake | |
| 3712 typerr(t); | |
| 3713 | |
| 3714 case RawPtr: return TypePtr::BOTTOM; | |
| 3715 | |
| 3716 case OopPtr: { // Meeting to OopPtrs | |
| 3717 // Found a OopPtr type vs self-KlassPtr type | |
| 3718 const TypePtr *tp = t->is_oopptr(); | |
| 3719 int offset = meet_offset(tp->offset()); | |
| 3720 PTR ptr = meet_ptr(tp->ptr()); | |
| 3721 switch (tp->ptr()) { | |
| 3722 case TopPTR: | |
| 3723 case AnyNull: | |
| 3724 return make(ptr, klass(), offset); | |
| 3725 case BotPTR: | |
| 3726 case NotNull: | |
| 3727 return TypePtr::make(AnyPtr, ptr, offset); | |
| 3728 default: typerr(t); | |
| 3729 } | |
| 3730 } | |
| 3731 | |
| 3732 case AnyPtr: { // Meeting to AnyPtrs | |
| 3733 // Found an AnyPtr type vs self-KlassPtr type | |
| 3734 const TypePtr *tp = t->is_ptr(); | |
| 3735 int offset = meet_offset(tp->offset()); | |
| 3736 PTR ptr = meet_ptr(tp->ptr()); | |
| 3737 switch (tp->ptr()) { | |
| 3738 case TopPTR: | |
| 3739 return this; | |
| 3740 case Null: | |
| 3741 if( ptr == Null ) return TypePtr::make( AnyPtr, ptr, offset ); | |
| 3742 case AnyNull: | |
| 3743 return make( ptr, klass(), offset ); | |
| 3744 case BotPTR: | |
| 3745 case NotNull: | |
| 3746 return TypePtr::make(AnyPtr, ptr, offset); | |
| 3747 default: typerr(t); | |
| 3748 } | |
| 3749 } | |
| 3750 | |
| 3751 case AryPtr: // Meet with AryPtr | |
| 3752 case InstPtr: // Meet with InstPtr | |
| 3753 return TypeInstPtr::BOTTOM; | |
| 3754 | |
| 3755 // | |
| 3756 // A-top } | |
| 3757 // / | \ } Tops | |
| 3758 // B-top A-any C-top } | |
| 3759 // | / | \ | } Any-nulls | |
| 3760 // B-any | C-any } | |
| 3761 // | | | | |
| 3762 // B-con A-con C-con } constants; not comparable across classes | |
| 3763 // | | | | |
| 3764 // B-not | C-not } | |
| 3765 // | \ | / | } not-nulls | |
| 3766 // B-bot A-not C-bot } | |
| 3767 // \ | / } Bottoms | |
| 3768 // A-bot } | |
| 3769 // | |
| 3770 | |
| 3771 case KlassPtr: { // Meet two KlassPtr types | |
| 3772 const TypeKlassPtr *tkls = t->is_klassptr(); | |
| 3773 int off = meet_offset(tkls->offset()); | |
| 3774 PTR ptr = meet_ptr(tkls->ptr()); | |
| 3775 | |
| 3776 // Check for easy case; klasses are equal (and perhaps not loaded!) | |
| 3777 // If we have constants, then we created oops so classes are loaded | |
| 3778 // and we can handle the constants further down. This case handles | |
| 3779 // not-loaded classes | |
| 3780 if( ptr != Constant && tkls->klass()->equals(klass()) ) { | |
| 3781 return make( ptr, klass(), off ); | |
| 3782 } | |
| 3783 | |
| 3784 // Classes require inspection in the Java klass hierarchy. Must be loaded. | |
| 3785 ciKlass* tkls_klass = tkls->klass(); | |
| 3786 ciKlass* this_klass = this->klass(); | |
| 3787 assert( tkls_klass->is_loaded(), "This class should have been loaded."); | |
| 3788 assert( this_klass->is_loaded(), "This class should have been loaded."); | |
| 3789 | |
| 3790 // If 'this' type is above the centerline and is a superclass of the | |
| 3791 // other, we can treat 'this' as having the same type as the other. | |
| 3792 if ((above_centerline(this->ptr())) && | |
| 3793 tkls_klass->is_subtype_of(this_klass)) { | |
| 3794 this_klass = tkls_klass; | |
| 3795 } | |
| 3796 // If 'tinst' type is above the centerline and is a superclass of the | |
| 3797 // other, we can treat 'tinst' as having the same type as the other. | |
| 3798 if ((above_centerline(tkls->ptr())) && | |
| 3799 this_klass->is_subtype_of(tkls_klass)) { | |
| 3800 tkls_klass = this_klass; | |
| 3801 } | |
| 3802 | |
| 3803 // Check for classes now being equal | |
| 3804 if (tkls_klass->equals(this_klass)) { | |
| 3805 // If the klasses are equal, the constants may still differ. Fall to | |
| 3806 // NotNull if they do (neither constant is NULL; that is a special case | |
| 3807 // handled elsewhere). | |
| 3808 ciObject* o = NULL; // Assume not constant when done | |
| 3809 ciObject* this_oop = const_oop(); | |
| 3810 ciObject* tkls_oop = tkls->const_oop(); | |
| 3811 if( ptr == Constant ) { | |
| 3812 if (this_oop != NULL && tkls_oop != NULL && | |
| 3813 this_oop->equals(tkls_oop) ) | |
| 3814 o = this_oop; | |
| 3815 else if (above_centerline(this->ptr())) | |
| 3816 o = tkls_oop; | |
| 3817 else if (above_centerline(tkls->ptr())) | |
| 3818 o = this_oop; | |
| 3819 else | |
| 3820 ptr = NotNull; | |
| 3821 } | |
| 3822 return make( ptr, this_klass, off ); | |
| 3823 } // Else classes are not equal | |
| 3824 | |
| 3825 // Since klasses are different, we require the LCA in the Java | |
| 3826 // class hierarchy - which means we have to fall to at least NotNull. | |
| 3827 if( ptr == TopPTR || ptr == AnyNull || ptr == Constant ) | |
| 3828 ptr = NotNull; | |
| 3829 // Now we find the LCA of Java classes | |
| 3830 ciKlass* k = this_klass->least_common_ancestor(tkls_klass); | |
| 3831 return make( ptr, k, off ); | |
| 3832 } // End of case KlassPtr | |
| 3833 | |
| 3834 } // End of switch | |
| 3835 return this; // Return the double constant | |
| 3836 } | |
| 3837 | |
| 3838 //------------------------------xdual------------------------------------------ | |
| 3839 // Dual: compute field-by-field dual | |
| 3840 const Type *TypeKlassPtr::xdual() const { | |
| 3841 return new TypeKlassPtr( dual_ptr(), klass(), dual_offset() ); | |
| 3842 } | |
| 3843 | |
| 3844 //------------------------------dump2------------------------------------------ | |
| 3845 // Dump Klass Type | |
| 3846 #ifndef PRODUCT | |
| 3847 void TypeKlassPtr::dump2( Dict & d, uint depth, outputStream *st ) const { | |
| 3848 switch( _ptr ) { | |
| 3849 case Constant: | |
| 3850 st->print("precise "); | |
| 3851 case NotNull: | |
| 3852 { | |
| 3853 const char *name = klass()->name()->as_utf8(); | |
| 3854 if( name ) { | |
| 3855 st->print("klass %s: " INTPTR_FORMAT, name, klass()); | |
| 3856 } else { | |
| 3857 ShouldNotReachHere(); | |
| 3858 } | |
| 3859 } | |
| 3860 case BotPTR: | |
| 3861 if( !WizardMode && !Verbose && !_klass_is_exact ) break; | |
| 3862 case TopPTR: | |
| 3863 case AnyNull: | |
| 3864 st->print(":%s", ptr_msg[_ptr]); | |
| 3865 if( _klass_is_exact ) st->print(":exact"); | |
| 3866 break; | |
| 3867 } | |
| 3868 | |
| 3869 if( _offset ) { // Dump offset, if any | |
| 3870 if( _offset == OffsetBot ) { st->print("+any"); } | |
| 3871 else if( _offset == OffsetTop ) { st->print("+unknown"); } | |
| 3872 else { st->print("+%d", _offset); } | |
| 3873 } | |
| 3874 | |
| 3875 st->print(" *"); | |
| 3876 } | |
| 3877 #endif | |
| 3878 | |
| 3879 | |
| 3880 | |
| 3881 //============================================================================= | |
| 3882 // Convenience common pre-built types. | |
| 3883 | |
| 3884 //------------------------------make------------------------------------------- | |
| 3885 const TypeFunc *TypeFunc::make( const TypeTuple *domain, const TypeTuple *range ) { | |
| 3886 return (TypeFunc*)(new TypeFunc(domain,range))->hashcons(); | |
| 3887 } | |
| 3888 | |
| 3889 //------------------------------make------------------------------------------- | |
| 3890 const TypeFunc *TypeFunc::make(ciMethod* method) { | |
| 3891 Compile* C = Compile::current(); | |
| 3892 const TypeFunc* tf = C->last_tf(method); // check cache | |
| 3893 if (tf != NULL) return tf; // The hit rate here is almost 50%. | |
| 3894 const TypeTuple *domain; | |
| 3895 if (method->flags().is_static()) { | |
| 3896 domain = TypeTuple::make_domain(NULL, method->signature()); | |
| 3897 } else { | |
| 3898 domain = TypeTuple::make_domain(method->holder(), method->signature()); | |
| 3899 } | |
| 3900 const TypeTuple *range = TypeTuple::make_range(method->signature()); | |
| 3901 tf = TypeFunc::make(domain, range); | |
| 3902 C->set_last_tf(method, tf); // fill cache | |
| 3903 return tf; | |
| 3904 } | |
| 3905 | |
| 3906 //------------------------------meet------------------------------------------- | |
| 3907 // Compute the MEET of two types. It returns a new Type object. | |
| 3908 const Type *TypeFunc::xmeet( const Type *t ) const { | |
| 3909 // Perform a fast test for common case; meeting the same types together. | |
| 3910 if( this == t ) return this; // Meeting same type-rep? | |
| 3911 | |
| 3912 // Current "this->_base" is Func | |
| 3913 switch (t->base()) { // switch on original type | |
| 3914 | |
| 3915 case Bottom: // Ye Olde Default | |
| 3916 return t; | |
| 3917 | |
| 3918 default: // All else is a mistake | |
| 3919 typerr(t); | |
| 3920 | |
| 3921 case Top: | |
| 3922 break; | |
| 3923 } | |
| 3924 return this; // Return the double constant | |
| 3925 } | |
| 3926 | |
| 3927 //------------------------------xdual------------------------------------------ | |
| 3928 // Dual: compute field-by-field dual | |
| 3929 const Type *TypeFunc::xdual() const { | |
| 3930 return this; | |
| 3931 } | |
| 3932 | |
| 3933 //------------------------------eq--------------------------------------------- | |
| 3934 // Structural equality check for Type representations | |
| 3935 bool TypeFunc::eq( const Type *t ) const { | |
| 3936 const TypeFunc *a = (const TypeFunc*)t; | |
| 3937 return _domain == a->_domain && | |
| 3938 _range == a->_range; | |
| 3939 } | |
| 3940 | |
| 3941 //------------------------------hash------------------------------------------- | |
| 3942 // Type-specific hashing function. | |
| 3943 int TypeFunc::hash(void) const { | |
| 3944 return (intptr_t)_domain + (intptr_t)_range; | |
| 3945 } | |
| 3946 | |
| 3947 //------------------------------dump2------------------------------------------ | |
| 3948 // Dump Function Type | |
| 3949 #ifndef PRODUCT | |
| 3950 void TypeFunc::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 3951 if( _range->_cnt <= Parms ) | |
| 3952 st->print("void"); | |
| 3953 else { | |
| 3954 uint i; | |
| 3955 for (i = Parms; i < _range->_cnt-1; i++) { | |
| 3956 _range->field_at(i)->dump2(d,depth,st); | |
| 3957 st->print("/"); | |
| 3958 } | |
| 3959 _range->field_at(i)->dump2(d,depth,st); | |
| 3960 } | |
| 3961 st->print(" "); | |
| 3962 st->print("( "); | |
| 3963 if( !depth || d[this] ) { // Check for recursive dump | |
| 3964 st->print("...)"); | |
| 3965 return; | |
| 3966 } | |
| 3967 d.Insert((void*)this,(void*)this); // Stop recursion | |
| 3968 if (Parms < _domain->_cnt) | |
| 3969 _domain->field_at(Parms)->dump2(d,depth-1,st); | |
| 3970 for (uint i = Parms+1; i < _domain->_cnt; i++) { | |
| 3971 st->print(", "); | |
| 3972 _domain->field_at(i)->dump2(d,depth-1,st); | |
| 3973 } | |
| 3974 st->print(" )"); | |
| 3975 } | |
| 3976 | |
| 3977 //------------------------------print_flattened-------------------------------- | |
| 3978 // Print a 'flattened' signature | |
| 3979 static const char * const flat_type_msg[Type::lastype] = { | |
|
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3980 "bad","control","top","int","long","_", "narrowoop", |
| 0 | 3981 "tuple:", "array:", |
| 3982 "ptr", "rawptr", "ptr", "ptr", "ptr", "ptr", | |
| 3983 "func", "abIO", "return_address", "mem", | |
| 3984 "float_top", "ftcon:", "flt", | |
| 3985 "double_top", "dblcon:", "dbl", | |
| 3986 "bottom" | |
| 3987 }; | |
| 3988 | |
| 3989 void TypeFunc::print_flattened() const { | |
| 3990 if( _range->_cnt <= Parms ) | |
| 3991 tty->print("void"); | |
| 3992 else { | |
| 3993 uint i; | |
| 3994 for (i = Parms; i < _range->_cnt-1; i++) | |
| 3995 tty->print("%s/",flat_type_msg[_range->field_at(i)->base()]); | |
| 3996 tty->print("%s",flat_type_msg[_range->field_at(i)->base()]); | |
| 3997 } | |
| 3998 tty->print(" ( "); | |
| 3999 if (Parms < _domain->_cnt) | |
| 4000 tty->print("%s",flat_type_msg[_domain->field_at(Parms)->base()]); | |
| 4001 for (uint i = Parms+1; i < _domain->_cnt; i++) | |
| 4002 tty->print(", %s",flat_type_msg[_domain->field_at(i)->base()]); | |
| 4003 tty->print(" )"); | |
| 4004 } | |
| 4005 #endif | |
| 4006 | |
| 4007 //------------------------------singleton-------------------------------------- | |
| 4008 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
| 4009 // constants (Ldi nodes). Singletons are integer, float or double constants | |
| 4010 // or a single symbol. | |
| 4011 bool TypeFunc::singleton(void) const { | |
| 4012 return false; // Never a singleton | |
| 4013 } | |
| 4014 | |
| 4015 bool TypeFunc::empty(void) const { | |
| 4016 return false; // Never empty | |
| 4017 } | |
| 4018 | |
| 4019 | |
| 4020 BasicType TypeFunc::return_type() const{ | |
| 4021 if (range()->cnt() == TypeFunc::Parms) { | |
| 4022 return T_VOID; | |
| 4023 } | |
| 4024 return range()->field_at(TypeFunc::Parms)->basic_type(); | |
| 4025 } |