Mercurial > hg > truffle
annotate src/share/vm/opto/type.cpp @ 221:1e026f8da827
6710487: More than half of JDI Regression tests hang with COOPs in -Xcomp mode
Summary: Remove DecodeNNode::decode() and EncodePNode::encode() methods.
Reviewed-by: rasbold, never
| author | kvn |
|---|---|
| date | Tue, 24 Jun 2008 10:43:29 -0700 |
| parents | d4dbd9f91680 |
| children | 1dd146f17531 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved. | |
| 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 } | |
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171 /* |
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172 //------------------------------make_ptr--------------------------------------- |
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173 // Returns this ptr type or the equivalent ptr type for this compressed pointer. |
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174 const TypePtr* Type::make_ptr() const { |
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175 return (_base == NarrowOop) ? is_narrowoop()->make_oopptr() : is_ptr(); |
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176 } |
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177 |
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178 //------------------------------make_narrowoop--------------------------------- |
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179 // Returns this compressed pointer or the equivalent compressed version |
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180 // of this pointer type. |
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181 const TypeNarrowOop* Type::make_narrowoop() const { |
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182 return (_base == NarrowOop) ? is_narrowoop() : TypeNarrowOop::make(is_ptr()); |
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183 } |
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184 */ |
| 0 | 185 //------------------------------cmp-------------------------------------------- |
| 186 int Type::cmp( const Type *const t1, const Type *const t2 ) { | |
| 187 if( t1->_base != t2->_base ) | |
| 188 return 1; // Missed badly | |
| 189 assert(t1 != t2 || t1->eq(t2), "eq must be reflexive"); | |
| 190 return !t1->eq(t2); // Return ZERO if equal | |
| 191 } | |
| 192 | |
| 193 //------------------------------hash------------------------------------------- | |
| 194 int Type::uhash( const Type *const t ) { | |
| 195 return t->hash(); | |
| 196 } | |
| 197 | |
| 198 //--------------------------Initialize_shared---------------------------------- | |
| 199 void Type::Initialize_shared(Compile* current) { | |
| 200 // This method does not need to be locked because the first system | |
| 201 // compilations (stub compilations) occur serially. If they are | |
| 202 // changed to proceed in parallel, then this section will need | |
| 203 // locking. | |
| 204 | |
| 205 Arena* save = current->type_arena(); | |
| 206 Arena* shared_type_arena = new Arena(); | |
| 207 | |
| 208 current->set_type_arena(shared_type_arena); | |
| 209 _shared_type_dict = | |
| 210 new (shared_type_arena) Dict( (CmpKey)Type::cmp, (Hash)Type::uhash, | |
| 211 shared_type_arena, 128 ); | |
| 212 current->set_type_dict(_shared_type_dict); | |
| 213 | |
| 214 // Make shared pre-built types. | |
| 215 CONTROL = make(Control); // Control only | |
| 216 TOP = make(Top); // No values in set | |
| 217 MEMORY = make(Memory); // Abstract store only | |
| 218 ABIO = make(Abio); // State-of-machine only | |
| 219 RETURN_ADDRESS=make(Return_Address); | |
| 220 FLOAT = make(FloatBot); // All floats | |
| 221 DOUBLE = make(DoubleBot); // All doubles | |
| 222 BOTTOM = make(Bottom); // Everything | |
| 223 HALF = make(Half); // Placeholder half of doublewide type | |
| 224 | |
| 225 TypeF::ZERO = TypeF::make(0.0); // Float 0 (positive zero) | |
| 226 TypeF::ONE = TypeF::make(1.0); // Float 1 | |
| 227 | |
| 228 TypeD::ZERO = TypeD::make(0.0); // Double 0 (positive zero) | |
| 229 TypeD::ONE = TypeD::make(1.0); // Double 1 | |
| 230 | |
| 231 TypeInt::MINUS_1 = TypeInt::make(-1); // -1 | |
| 232 TypeInt::ZERO = TypeInt::make( 0); // 0 | |
| 233 TypeInt::ONE = TypeInt::make( 1); // 1 | |
| 234 TypeInt::BOOL = TypeInt::make(0,1, WidenMin); // 0 or 1, FALSE or TRUE. | |
| 235 TypeInt::CC = TypeInt::make(-1, 1, WidenMin); // -1, 0 or 1, condition codes | |
| 236 TypeInt::CC_LT = TypeInt::make(-1,-1, WidenMin); // == TypeInt::MINUS_1 | |
| 237 TypeInt::CC_GT = TypeInt::make( 1, 1, WidenMin); // == TypeInt::ONE | |
| 238 TypeInt::CC_EQ = TypeInt::make( 0, 0, WidenMin); // == TypeInt::ZERO | |
| 239 TypeInt::CC_LE = TypeInt::make(-1, 0, WidenMin); | |
| 240 TypeInt::CC_GE = TypeInt::make( 0, 1, WidenMin); // == TypeInt::BOOL | |
| 241 TypeInt::BYTE = TypeInt::make(-128,127, WidenMin); // Bytes | |
| 242 TypeInt::CHAR = TypeInt::make(0,65535, WidenMin); // Java chars | |
| 243 TypeInt::SHORT = TypeInt::make(-32768,32767, WidenMin); // Java shorts | |
| 244 TypeInt::POS = TypeInt::make(0,max_jint, WidenMin); // Non-neg values | |
| 245 TypeInt::POS1 = TypeInt::make(1,max_jint, WidenMin); // Positive values | |
| 246 TypeInt::INT = TypeInt::make(min_jint,max_jint, WidenMax); // 32-bit integers | |
| 247 TypeInt::SYMINT = TypeInt::make(-max_jint,max_jint,WidenMin); // symmetric range | |
| 248 // CmpL is overloaded both as the bytecode computation returning | |
| 249 // a trinary (-1,0,+1) integer result AND as an efficient long | |
| 250 // compare returning optimizer ideal-type flags. | |
| 251 assert( TypeInt::CC_LT == TypeInt::MINUS_1, "types must match for CmpL to work" ); | |
| 252 assert( TypeInt::CC_GT == TypeInt::ONE, "types must match for CmpL to work" ); | |
| 253 assert( TypeInt::CC_EQ == TypeInt::ZERO, "types must match for CmpL to work" ); | |
| 254 assert( TypeInt::CC_GE == TypeInt::BOOL, "types must match for CmpL to work" ); | |
| 255 | |
| 256 TypeLong::MINUS_1 = TypeLong::make(-1); // -1 | |
| 257 TypeLong::ZERO = TypeLong::make( 0); // 0 | |
| 258 TypeLong::ONE = TypeLong::make( 1); // 1 | |
| 259 TypeLong::POS = TypeLong::make(0,max_jlong, WidenMin); // Non-neg values | |
| 260 TypeLong::LONG = TypeLong::make(min_jlong,max_jlong,WidenMax); // 64-bit integers | |
| 261 TypeLong::INT = TypeLong::make((jlong)min_jint,(jlong)max_jint,WidenMin); | |
| 262 TypeLong::UINT = TypeLong::make(0,(jlong)max_juint,WidenMin); | |
| 263 | |
| 264 const Type **fboth =(const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*)); | |
| 265 fboth[0] = Type::CONTROL; | |
| 266 fboth[1] = Type::CONTROL; | |
| 267 TypeTuple::IFBOTH = TypeTuple::make( 2, fboth ); | |
| 268 | |
| 269 const Type **ffalse =(const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*)); | |
| 270 ffalse[0] = Type::CONTROL; | |
| 271 ffalse[1] = Type::TOP; | |
| 272 TypeTuple::IFFALSE = TypeTuple::make( 2, ffalse ); | |
| 273 | |
| 274 const Type **fneither =(const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*)); | |
| 275 fneither[0] = Type::TOP; | |
| 276 fneither[1] = Type::TOP; | |
| 277 TypeTuple::IFNEITHER = TypeTuple::make( 2, fneither ); | |
| 278 | |
| 279 const Type **ftrue =(const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*)); | |
| 280 ftrue[0] = Type::TOP; | |
| 281 ftrue[1] = Type::CONTROL; | |
| 282 TypeTuple::IFTRUE = TypeTuple::make( 2, ftrue ); | |
| 283 | |
| 284 const Type **floop =(const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*)); | |
| 285 floop[0] = Type::CONTROL; | |
| 286 floop[1] = TypeInt::INT; | |
| 287 TypeTuple::LOOPBODY = TypeTuple::make( 2, floop ); | |
| 288 | |
| 289 TypePtr::NULL_PTR= TypePtr::make( AnyPtr, TypePtr::Null, 0 ); | |
| 290 TypePtr::NOTNULL = TypePtr::make( AnyPtr, TypePtr::NotNull, OffsetBot ); | |
| 291 TypePtr::BOTTOM = TypePtr::make( AnyPtr, TypePtr::BotPTR, OffsetBot ); | |
| 292 | |
| 293 TypeRawPtr::BOTTOM = TypeRawPtr::make( TypePtr::BotPTR ); | |
| 294 TypeRawPtr::NOTNULL= TypeRawPtr::make( TypePtr::NotNull ); | |
| 295 | |
| 296 const Type **fmembar = TypeTuple::fields(0); | |
| 297 TypeTuple::MEMBAR = TypeTuple::make(TypeFunc::Parms+0, fmembar); | |
| 298 | |
| 299 const Type **fsc = (const Type**)shared_type_arena->Amalloc_4(2*sizeof(Type*)); | |
| 300 fsc[0] = TypeInt::CC; | |
| 301 fsc[1] = Type::MEMORY; | |
| 302 TypeTuple::STORECONDITIONAL = TypeTuple::make(2, fsc); | |
| 303 | |
| 304 TypeInstPtr::NOTNULL = TypeInstPtr::make(TypePtr::NotNull, current->env()->Object_klass()); | |
| 305 TypeInstPtr::BOTTOM = TypeInstPtr::make(TypePtr::BotPTR, current->env()->Object_klass()); | |
| 306 TypeInstPtr::MIRROR = TypeInstPtr::make(TypePtr::NotNull, current->env()->Class_klass()); | |
| 307 TypeInstPtr::MARK = TypeInstPtr::make(TypePtr::BotPTR, current->env()->Object_klass(), | |
| 308 false, 0, oopDesc::mark_offset_in_bytes()); | |
| 309 TypeInstPtr::KLASS = TypeInstPtr::make(TypePtr::BotPTR, current->env()->Object_klass(), | |
| 310 false, 0, oopDesc::klass_offset_in_bytes()); | |
| 311 TypeOopPtr::BOTTOM = TypeOopPtr::make(TypePtr::BotPTR, OffsetBot); | |
| 312 | |
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313 TypeNarrowOop::NULL_PTR = TypeNarrowOop::make( TypePtr::NULL_PTR ); |
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314 TypeNarrowOop::BOTTOM = TypeNarrowOop::make( TypeInstPtr::BOTTOM ); |
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315 |
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316 mreg2type[Op_Node] = Type::BOTTOM; |
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317 mreg2type[Op_Set ] = 0; |
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318 mreg2type[Op_RegN] = TypeNarrowOop::BOTTOM; |
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319 mreg2type[Op_RegI] = TypeInt::INT; |
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320 mreg2type[Op_RegP] = TypePtr::BOTTOM; |
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321 mreg2type[Op_RegF] = Type::FLOAT; |
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322 mreg2type[Op_RegD] = Type::DOUBLE; |
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323 mreg2type[Op_RegL] = TypeLong::LONG; |
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324 mreg2type[Op_RegFlags] = TypeInt::CC; |
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325 |
| 0 | 326 TypeAryPtr::RANGE = TypeAryPtr::make( TypePtr::BotPTR, TypeAry::make(Type::BOTTOM,TypeInt::POS), current->env()->Object_klass(), false, arrayOopDesc::length_offset_in_bytes()); |
| 163 | 327 |
| 328 TypeAryPtr::NARROWOOPS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeNarrowOop::BOTTOM, TypeInt::POS), NULL /*ciArrayKlass::make(o)*/, false, Type::OffsetBot); | |
| 329 | |
| 330 #ifdef _LP64 | |
| 331 if (UseCompressedOops) { | |
| 332 TypeAryPtr::OOPS = TypeAryPtr::NARROWOOPS; | |
| 333 } else | |
| 334 #endif | |
| 335 { | |
| 336 // There is no shared klass for Object[]. See note in TypeAryPtr::klass(). | |
| 337 TypeAryPtr::OOPS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInstPtr::BOTTOM,TypeInt::POS), NULL /*ciArrayKlass::make(o)*/, false, Type::OffsetBot); | |
| 338 } | |
| 0 | 339 TypeAryPtr::BYTES = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::BYTE ,TypeInt::POS), ciTypeArrayKlass::make(T_BYTE), true, Type::OffsetBot); |
| 340 TypeAryPtr::SHORTS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::SHORT ,TypeInt::POS), ciTypeArrayKlass::make(T_SHORT), true, Type::OffsetBot); | |
| 341 TypeAryPtr::CHARS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::CHAR ,TypeInt::POS), ciTypeArrayKlass::make(T_CHAR), true, Type::OffsetBot); | |
| 342 TypeAryPtr::INTS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::INT ,TypeInt::POS), ciTypeArrayKlass::make(T_INT), true, Type::OffsetBot); | |
| 343 TypeAryPtr::LONGS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeLong::LONG ,TypeInt::POS), ciTypeArrayKlass::make(T_LONG), true, Type::OffsetBot); | |
| 344 TypeAryPtr::FLOATS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(Type::FLOAT ,TypeInt::POS), ciTypeArrayKlass::make(T_FLOAT), true, Type::OffsetBot); | |
| 345 TypeAryPtr::DOUBLES = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(Type::DOUBLE ,TypeInt::POS), ciTypeArrayKlass::make(T_DOUBLE), true, Type::OffsetBot); | |
| 346 | |
| 163 | 347 // Nobody should ask _array_body_type[T_NARROWOOP]. Use NULL as assert. |
| 348 TypeAryPtr::_array_body_type[T_NARROWOOP] = NULL; | |
| 0 | 349 TypeAryPtr::_array_body_type[T_OBJECT] = TypeAryPtr::OOPS; |
| 163 | 350 TypeAryPtr::_array_body_type[T_ARRAY] = TypeAryPtr::OOPS; // arrays are stored in oop arrays |
| 0 | 351 TypeAryPtr::_array_body_type[T_BYTE] = TypeAryPtr::BYTES; |
| 352 TypeAryPtr::_array_body_type[T_BOOLEAN] = TypeAryPtr::BYTES; // boolean[] is a byte array | |
| 353 TypeAryPtr::_array_body_type[T_SHORT] = TypeAryPtr::SHORTS; | |
| 354 TypeAryPtr::_array_body_type[T_CHAR] = TypeAryPtr::CHARS; | |
| 355 TypeAryPtr::_array_body_type[T_INT] = TypeAryPtr::INTS; | |
| 356 TypeAryPtr::_array_body_type[T_LONG] = TypeAryPtr::LONGS; | |
| 357 TypeAryPtr::_array_body_type[T_FLOAT] = TypeAryPtr::FLOATS; | |
| 358 TypeAryPtr::_array_body_type[T_DOUBLE] = TypeAryPtr::DOUBLES; | |
| 359 | |
| 360 TypeKlassPtr::OBJECT = TypeKlassPtr::make( TypePtr::NotNull, current->env()->Object_klass(), 0 ); | |
| 361 TypeKlassPtr::OBJECT_OR_NULL = TypeKlassPtr::make( TypePtr::BotPTR, current->env()->Object_klass(), 0 ); | |
| 362 | |
| 363 const Type **fi2c = TypeTuple::fields(2); | |
| 364 fi2c[TypeFunc::Parms+0] = TypeInstPtr::BOTTOM; // methodOop | |
| 365 fi2c[TypeFunc::Parms+1] = TypeRawPtr::BOTTOM; // argument pointer | |
| 366 TypeTuple::START_I2C = TypeTuple::make(TypeFunc::Parms+2, fi2c); | |
| 367 | |
| 368 const Type **intpair = TypeTuple::fields(2); | |
| 369 intpair[0] = TypeInt::INT; | |
| 370 intpair[1] = TypeInt::INT; | |
| 371 TypeTuple::INT_PAIR = TypeTuple::make(2, intpair); | |
| 372 | |
| 373 const Type **longpair = TypeTuple::fields(2); | |
| 374 longpair[0] = TypeLong::LONG; | |
| 375 longpair[1] = TypeLong::LONG; | |
| 376 TypeTuple::LONG_PAIR = TypeTuple::make(2, longpair); | |
| 377 | |
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378 _const_basic_type[T_NARROWOOP] = TypeNarrowOop::BOTTOM; |
| 0 | 379 _const_basic_type[T_BOOLEAN] = TypeInt::BOOL; |
| 380 _const_basic_type[T_CHAR] = TypeInt::CHAR; | |
| 381 _const_basic_type[T_BYTE] = TypeInt::BYTE; | |
| 382 _const_basic_type[T_SHORT] = TypeInt::SHORT; | |
| 383 _const_basic_type[T_INT] = TypeInt::INT; | |
| 384 _const_basic_type[T_LONG] = TypeLong::LONG; | |
| 385 _const_basic_type[T_FLOAT] = Type::FLOAT; | |
| 386 _const_basic_type[T_DOUBLE] = Type::DOUBLE; | |
| 387 _const_basic_type[T_OBJECT] = TypeInstPtr::BOTTOM; | |
| 388 _const_basic_type[T_ARRAY] = TypeInstPtr::BOTTOM; // there is no separate bottom for arrays | |
| 389 _const_basic_type[T_VOID] = TypePtr::NULL_PTR; // reflection represents void this way | |
| 390 _const_basic_type[T_ADDRESS] = TypeRawPtr::BOTTOM; // both interpreter return addresses & random raw ptrs | |
| 391 _const_basic_type[T_CONFLICT]= Type::BOTTOM; // why not? | |
| 392 | |
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393 _zero_type[T_NARROWOOP] = TypeNarrowOop::NULL_PTR; |
| 0 | 394 _zero_type[T_BOOLEAN] = TypeInt::ZERO; // false == 0 |
| 395 _zero_type[T_CHAR] = TypeInt::ZERO; // '\0' == 0 | |
| 396 _zero_type[T_BYTE] = TypeInt::ZERO; // 0x00 == 0 | |
| 397 _zero_type[T_SHORT] = TypeInt::ZERO; // 0x0000 == 0 | |
| 398 _zero_type[T_INT] = TypeInt::ZERO; | |
| 399 _zero_type[T_LONG] = TypeLong::ZERO; | |
| 400 _zero_type[T_FLOAT] = TypeF::ZERO; | |
| 401 _zero_type[T_DOUBLE] = TypeD::ZERO; | |
| 402 _zero_type[T_OBJECT] = TypePtr::NULL_PTR; | |
| 403 _zero_type[T_ARRAY] = TypePtr::NULL_PTR; // null array is null oop | |
| 404 _zero_type[T_ADDRESS] = TypePtr::NULL_PTR; // raw pointers use the same null | |
| 405 _zero_type[T_VOID] = Type::TOP; // the only void value is no value at all | |
| 406 | |
| 407 // get_zero_type() should not happen for T_CONFLICT | |
| 408 _zero_type[T_CONFLICT]= NULL; | |
| 409 | |
| 410 // Restore working type arena. | |
| 411 current->set_type_arena(save); | |
| 412 current->set_type_dict(NULL); | |
| 413 } | |
| 414 | |
| 415 //------------------------------Initialize------------------------------------- | |
| 416 void Type::Initialize(Compile* current) { | |
| 417 assert(current->type_arena() != NULL, "must have created type arena"); | |
| 418 | |
| 419 if (_shared_type_dict == NULL) { | |
| 420 Initialize_shared(current); | |
| 421 } | |
| 422 | |
| 423 Arena* type_arena = current->type_arena(); | |
| 424 | |
| 425 // Create the hash-cons'ing dictionary with top-level storage allocation | |
| 426 Dict *tdic = new (type_arena) Dict( (CmpKey)Type::cmp,(Hash)Type::uhash, type_arena, 128 ); | |
| 427 current->set_type_dict(tdic); | |
| 428 | |
| 429 // Transfer the shared types. | |
| 430 DictI i(_shared_type_dict); | |
| 431 for( ; i.test(); ++i ) { | |
| 432 Type* t = (Type*)i._value; | |
| 433 tdic->Insert(t,t); // New Type, insert into Type table | |
| 434 } | |
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435 |
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436 #ifdef ASSERT |
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437 verify_lastype(); |
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438 #endif |
| 0 | 439 } |
| 440 | |
| 441 //------------------------------hashcons--------------------------------------- | |
| 442 // Do the hash-cons trick. If the Type already exists in the type table, | |
| 443 // delete the current Type and return the existing Type. Otherwise stick the | |
| 444 // current Type in the Type table. | |
| 445 const Type *Type::hashcons(void) { | |
| 446 debug_only(base()); // Check the assertion in Type::base(). | |
| 447 // Look up the Type in the Type dictionary | |
| 448 Dict *tdic = type_dict(); | |
| 449 Type* old = (Type*)(tdic->Insert(this, this, false)); | |
| 450 if( old ) { // Pre-existing Type? | |
| 451 if( old != this ) // Yes, this guy is not the pre-existing? | |
| 452 delete this; // Yes, Nuke this guy | |
| 453 assert( old->_dual, "" ); | |
| 454 return old; // Return pre-existing | |
| 455 } | |
| 456 | |
| 457 // Every type has a dual (to make my lattice symmetric). | |
| 458 // Since we just discovered a new Type, compute its dual right now. | |
| 459 assert( !_dual, "" ); // No dual yet | |
| 460 _dual = xdual(); // Compute the dual | |
| 461 if( cmp(this,_dual)==0 ) { // Handle self-symmetric | |
| 462 _dual = this; | |
| 463 return this; | |
| 464 } | |
| 465 assert( !_dual->_dual, "" ); // No reverse dual yet | |
| 466 assert( !(*tdic)[_dual], "" ); // Dual not in type system either | |
| 467 // New Type, insert into Type table | |
| 468 tdic->Insert((void*)_dual,(void*)_dual); | |
| 469 ((Type*)_dual)->_dual = this; // Finish up being symmetric | |
| 470 #ifdef ASSERT | |
| 471 Type *dual_dual = (Type*)_dual->xdual(); | |
| 472 assert( eq(dual_dual), "xdual(xdual()) should be identity" ); | |
| 473 delete dual_dual; | |
| 474 #endif | |
| 475 return this; // Return new Type | |
| 476 } | |
| 477 | |
| 478 //------------------------------eq--------------------------------------------- | |
| 479 // Structural equality check for Type representations | |
| 480 bool Type::eq( const Type * ) const { | |
| 481 return true; // Nothing else can go wrong | |
| 482 } | |
| 483 | |
| 484 //------------------------------hash------------------------------------------- | |
| 485 // Type-specific hashing function. | |
| 486 int Type::hash(void) const { | |
| 487 return _base; | |
| 488 } | |
| 489 | |
| 490 //------------------------------is_finite-------------------------------------- | |
| 491 // Has a finite value | |
| 492 bool Type::is_finite() const { | |
| 493 return false; | |
| 494 } | |
| 495 | |
| 496 //------------------------------is_nan----------------------------------------- | |
| 497 // Is not a number (NaN) | |
| 498 bool Type::is_nan() const { | |
| 499 return false; | |
| 500 } | |
| 501 | |
| 502 //------------------------------meet------------------------------------------- | |
| 503 // Compute the MEET of two types. NOT virtual. It enforces that meet is | |
| 504 // commutative and the lattice is symmetric. | |
| 505 const Type *Type::meet( const Type *t ) const { | |
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506 if (isa_narrowoop() && t->isa_narrowoop()) { |
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507 const Type* result = make_ptr()->meet(t->make_ptr()); |
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508 return result->make_narrowoop(); |
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509 } |
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510 |
| 0 | 511 const Type *mt = xmeet(t); |
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512 if (isa_narrowoop() || t->isa_narrowoop()) return mt; |
| 0 | 513 #ifdef ASSERT |
| 514 assert( mt == t->xmeet(this), "meet not commutative" ); | |
| 515 const Type* dual_join = mt->_dual; | |
| 516 const Type *t2t = dual_join->xmeet(t->_dual); | |
| 517 const Type *t2this = dual_join->xmeet( _dual); | |
| 518 | |
| 519 // Interface meet Oop is Not Symmetric: | |
| 520 // Interface:AnyNull meet Oop:AnyNull == Interface:AnyNull | |
| 521 // Interface:NotNull meet Oop:NotNull == java/lang/Object:NotNull | |
| 522 const TypeInstPtr* this_inst = this->isa_instptr(); | |
| 523 const TypeInstPtr* t_inst = t->isa_instptr(); | |
| 524 bool interface_vs_oop = false; | |
| 525 if( this_inst && this_inst->is_loaded() && t_inst && t_inst->is_loaded() ) { | |
| 526 bool this_interface = this_inst->klass()->is_interface(); | |
| 527 bool t_interface = t_inst->klass()->is_interface(); | |
| 528 interface_vs_oop = this_interface ^ t_interface; | |
| 529 } | |
| 530 const Type *tdual = t->_dual; | |
| 531 const Type *thisdual = _dual; | |
| 532 // strip out instances | |
| 533 if (t2t->isa_oopptr() != NULL) { | |
| 534 t2t = t2t->isa_oopptr()->cast_to_instance(TypeOopPtr::UNKNOWN_INSTANCE); | |
| 535 } | |
| 536 if (t2this->isa_oopptr() != NULL) { | |
| 537 t2this = t2this->isa_oopptr()->cast_to_instance(TypeOopPtr::UNKNOWN_INSTANCE); | |
| 538 } | |
| 539 if (tdual->isa_oopptr() != NULL) { | |
| 540 tdual = tdual->isa_oopptr()->cast_to_instance(TypeOopPtr::UNKNOWN_INSTANCE); | |
| 541 } | |
| 542 if (thisdual->isa_oopptr() != NULL) { | |
| 543 thisdual = thisdual->isa_oopptr()->cast_to_instance(TypeOopPtr::UNKNOWN_INSTANCE); | |
| 544 } | |
| 545 | |
| 546 if( !interface_vs_oop && (t2t != tdual || t2this != thisdual) ) { | |
| 547 tty->print_cr("=== Meet Not Symmetric ==="); | |
| 548 tty->print("t = "); t->dump(); tty->cr(); | |
| 549 tty->print("this= "); dump(); tty->cr(); | |
| 550 tty->print("mt=(t meet this)= "); mt->dump(); tty->cr(); | |
| 551 | |
| 552 tty->print("t_dual= "); t->_dual->dump(); tty->cr(); | |
| 553 tty->print("this_dual= "); _dual->dump(); tty->cr(); | |
| 554 tty->print("mt_dual= "); mt->_dual->dump(); tty->cr(); | |
| 555 | |
| 556 tty->print("mt_dual meet t_dual= "); t2t ->dump(); tty->cr(); | |
| 557 tty->print("mt_dual meet this_dual= "); t2this ->dump(); tty->cr(); | |
| 558 | |
| 559 fatal("meet not symmetric" ); | |
| 560 } | |
| 561 #endif | |
| 562 return mt; | |
| 563 } | |
| 564 | |
| 565 //------------------------------xmeet------------------------------------------ | |
| 566 // Compute the MEET of two types. It returns a new Type object. | |
| 567 const Type *Type::xmeet( const Type *t ) const { | |
| 568 // Perform a fast test for common case; meeting the same types together. | |
| 569 if( this == t ) return this; // Meeting same type-rep? | |
| 570 | |
| 571 // Meeting TOP with anything? | |
| 572 if( _base == Top ) return t; | |
| 573 | |
| 574 // Meeting BOTTOM with anything? | |
| 575 if( _base == Bottom ) return BOTTOM; | |
| 576 | |
| 577 // Current "this->_base" is one of: Bad, Multi, Control, Top, | |
| 578 // Abio, Abstore, Floatxxx, Doublexxx, Bottom, lastype. | |
| 579 switch (t->base()) { // Switch on original type | |
| 580 | |
| 581 // Cut in half the number of cases I must handle. Only need cases for when | |
| 582 // the given enum "t->type" is less than or equal to the local enum "type". | |
| 583 case FloatCon: | |
| 584 case DoubleCon: | |
| 585 case Int: | |
| 586 case Long: | |
| 587 return t->xmeet(this); | |
| 588 | |
| 589 case OopPtr: | |
| 590 return t->xmeet(this); | |
| 591 | |
| 592 case InstPtr: | |
| 593 return t->xmeet(this); | |
| 594 | |
| 595 case KlassPtr: | |
| 596 return t->xmeet(this); | |
| 597 | |
| 598 case AryPtr: | |
| 599 return t->xmeet(this); | |
| 600 | |
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601 case NarrowOop: |
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602 return t->xmeet(this); |
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603 |
| 0 | 604 case Bad: // Type check |
| 605 default: // Bogus type not in lattice | |
| 606 typerr(t); | |
| 607 return Type::BOTTOM; | |
| 608 | |
| 609 case Bottom: // Ye Olde Default | |
| 610 return t; | |
| 611 | |
| 612 case FloatTop: | |
| 613 if( _base == FloatTop ) return this; | |
| 614 case FloatBot: // Float | |
| 615 if( _base == FloatBot || _base == FloatTop ) return FLOAT; | |
| 616 if( _base == DoubleTop || _base == DoubleBot ) return Type::BOTTOM; | |
| 617 typerr(t); | |
| 618 return Type::BOTTOM; | |
| 619 | |
| 620 case DoubleTop: | |
| 621 if( _base == DoubleTop ) return this; | |
| 622 case DoubleBot: // Double | |
| 623 if( _base == DoubleBot || _base == DoubleTop ) return DOUBLE; | |
| 624 if( _base == FloatTop || _base == FloatBot ) return Type::BOTTOM; | |
| 625 typerr(t); | |
| 626 return Type::BOTTOM; | |
| 627 | |
| 628 // These next few cases must match exactly or it is a compile-time error. | |
| 629 case Control: // Control of code | |
| 630 case Abio: // State of world outside of program | |
| 631 case Memory: | |
| 632 if( _base == t->_base ) return this; | |
| 633 typerr(t); | |
| 634 return Type::BOTTOM; | |
| 635 | |
| 636 case Top: // Top of the lattice | |
| 637 return this; | |
| 638 } | |
| 639 | |
| 640 // The type is unchanged | |
| 641 return this; | |
| 642 } | |
| 643 | |
| 644 //-----------------------------filter------------------------------------------ | |
| 645 const Type *Type::filter( const Type *kills ) const { | |
| 646 const Type* ft = join(kills); | |
| 647 if (ft->empty()) | |
| 648 return Type::TOP; // Canonical empty value | |
| 649 return ft; | |
| 650 } | |
| 651 | |
| 652 //------------------------------xdual------------------------------------------ | |
| 653 // Compute dual right now. | |
| 654 const Type::TYPES Type::dual_type[Type::lastype] = { | |
| 655 Bad, // Bad | |
| 656 Control, // Control | |
| 657 Bottom, // Top | |
| 658 Bad, // Int - handled in v-call | |
| 659 Bad, // Long - handled in v-call | |
| 660 Half, // Half | |
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661 Bad, // NarrowOop - handled in v-call |
| 0 | 662 |
| 663 Bad, // Tuple - handled in v-call | |
| 664 Bad, // Array - handled in v-call | |
| 665 | |
| 666 Bad, // AnyPtr - handled in v-call | |
| 667 Bad, // RawPtr - handled in v-call | |
| 668 Bad, // OopPtr - handled in v-call | |
| 669 Bad, // InstPtr - handled in v-call | |
| 670 Bad, // AryPtr - handled in v-call | |
| 671 Bad, // KlassPtr - handled in v-call | |
| 672 | |
| 673 Bad, // Function - handled in v-call | |
| 674 Abio, // Abio | |
| 675 Return_Address,// Return_Address | |
| 676 Memory, // Memory | |
| 677 FloatBot, // FloatTop | |
| 678 FloatCon, // FloatCon | |
| 679 FloatTop, // FloatBot | |
| 680 DoubleBot, // DoubleTop | |
| 681 DoubleCon, // DoubleCon | |
| 682 DoubleTop, // DoubleBot | |
| 683 Top // Bottom | |
| 684 }; | |
| 685 | |
| 686 const Type *Type::xdual() const { | |
| 687 // Note: the base() accessor asserts the sanity of _base. | |
| 688 assert(dual_type[base()] != Bad, "implement with v-call"); | |
| 689 return new Type(dual_type[_base]); | |
| 690 } | |
| 691 | |
| 692 //------------------------------has_memory------------------------------------- | |
| 693 bool Type::has_memory() const { | |
| 694 Type::TYPES tx = base(); | |
| 695 if (tx == Memory) return true; | |
| 696 if (tx == Tuple) { | |
| 697 const TypeTuple *t = is_tuple(); | |
| 698 for (uint i=0; i < t->cnt(); i++) { | |
| 699 tx = t->field_at(i)->base(); | |
| 700 if (tx == Memory) return true; | |
| 701 } | |
| 702 } | |
| 703 return false; | |
| 704 } | |
| 705 | |
| 706 #ifndef PRODUCT | |
| 707 //------------------------------dump2------------------------------------------ | |
| 708 void Type::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 709 st->print(msg[_base]); | |
| 710 } | |
| 711 | |
| 712 //------------------------------dump------------------------------------------- | |
| 713 void Type::dump_on(outputStream *st) const { | |
| 714 ResourceMark rm; | |
| 715 Dict d(cmpkey,hashkey); // Stop recursive type dumping | |
| 716 dump2(d,1, st); | |
| 163 | 717 if (is_ptr_to_narrowoop()) { |
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718 st->print(" [narrow]"); |
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719 } |
| 0 | 720 } |
| 721 | |
| 722 //------------------------------data------------------------------------------- | |
| 723 const char * const Type::msg[Type::lastype] = { | |
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724 "bad","control","top","int:","long:","half", "narrowoop:", |
| 0 | 725 "tuple:", "aryptr", |
| 726 "anyptr:", "rawptr:", "java:", "inst:", "ary:", "klass:", | |
| 727 "func", "abIO", "return_address", "memory", | |
| 728 "float_top", "ftcon:", "float", | |
| 729 "double_top", "dblcon:", "double", | |
| 730 "bottom" | |
| 731 }; | |
| 732 #endif | |
| 733 | |
| 734 //------------------------------singleton-------------------------------------- | |
| 735 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
| 736 // constants (Ldi nodes). Singletons are integer, float or double constants. | |
| 737 bool Type::singleton(void) const { | |
| 738 return _base == Top || _base == Half; | |
| 739 } | |
| 740 | |
| 741 //------------------------------empty------------------------------------------ | |
| 742 // TRUE if Type is a type with no values, FALSE otherwise. | |
| 743 bool Type::empty(void) const { | |
| 744 switch (_base) { | |
| 745 case DoubleTop: | |
| 746 case FloatTop: | |
| 747 case Top: | |
| 748 return true; | |
| 749 | |
| 750 case Half: | |
| 751 case Abio: | |
| 752 case Return_Address: | |
| 753 case Memory: | |
| 754 case Bottom: | |
| 755 case FloatBot: | |
| 756 case DoubleBot: | |
| 757 return false; // never a singleton, therefore never empty | |
| 758 } | |
| 759 | |
| 760 ShouldNotReachHere(); | |
| 761 return false; | |
| 762 } | |
| 763 | |
| 764 //------------------------------dump_stats------------------------------------- | |
| 765 // Dump collected statistics to stderr | |
| 766 #ifndef PRODUCT | |
| 767 void Type::dump_stats() { | |
| 768 tty->print("Types made: %d\n", type_dict()->Size()); | |
| 769 } | |
| 770 #endif | |
| 771 | |
| 772 //------------------------------typerr----------------------------------------- | |
| 773 void Type::typerr( const Type *t ) const { | |
| 774 #ifndef PRODUCT | |
| 775 tty->print("\nError mixing types: "); | |
| 776 dump(); | |
| 777 tty->print(" and "); | |
| 778 t->dump(); | |
| 779 tty->print("\n"); | |
| 780 #endif | |
| 781 ShouldNotReachHere(); | |
| 782 } | |
| 783 | |
| 784 //------------------------------isa_oop_ptr------------------------------------ | |
| 785 // Return true if type is an oop pointer type. False for raw pointers. | |
| 786 static char isa_oop_ptr_tbl[Type::lastype] = { | |
|
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787 0,0,0,0,0,0,0/*narrowoop*/,0/*tuple*/, 0/*ary*/, |
| 0 | 788 0/*anyptr*/,0/*rawptr*/,1/*OopPtr*/,1/*InstPtr*/,1/*AryPtr*/,1/*KlassPtr*/, |
| 789 0/*func*/,0,0/*return_address*/,0, | |
| 790 /*floats*/0,0,0, /*doubles*/0,0,0, | |
| 791 0 | |
| 792 }; | |
| 793 bool Type::isa_oop_ptr() const { | |
| 794 return isa_oop_ptr_tbl[_base] != 0; | |
| 795 } | |
| 796 | |
| 797 //------------------------------dump_stats------------------------------------- | |
| 798 // // Check that arrays match type enum | |
| 799 #ifndef PRODUCT | |
| 800 void Type::verify_lastype() { | |
| 801 // Check that arrays match enumeration | |
| 802 assert( Type::dual_type [Type::lastype - 1] == Type::Top, "did not update array"); | |
| 803 assert( strcmp(Type::msg [Type::lastype - 1],"bottom") == 0, "did not update array"); | |
| 804 // assert( PhiNode::tbl [Type::lastype - 1] == NULL, "did not update array"); | |
| 805 assert( Matcher::base2reg[Type::lastype - 1] == 0, "did not update array"); | |
| 806 assert( isa_oop_ptr_tbl [Type::lastype - 1] == (char)0, "did not update array"); | |
| 807 } | |
| 808 #endif | |
| 809 | |
| 810 //============================================================================= | |
| 811 // Convenience common pre-built types. | |
| 812 const TypeF *TypeF::ZERO; // Floating point zero | |
| 813 const TypeF *TypeF::ONE; // Floating point one | |
| 814 | |
| 815 //------------------------------make------------------------------------------- | |
| 816 // Create a float constant | |
| 817 const TypeF *TypeF::make(float f) { | |
| 818 return (TypeF*)(new TypeF(f))->hashcons(); | |
| 819 } | |
| 820 | |
| 821 //------------------------------meet------------------------------------------- | |
| 822 // Compute the MEET of two types. It returns a new Type object. | |
| 823 const Type *TypeF::xmeet( const Type *t ) const { | |
| 824 // Perform a fast test for common case; meeting the same types together. | |
| 825 if( this == t ) return this; // Meeting same type-rep? | |
| 826 | |
| 827 // Current "this->_base" is FloatCon | |
| 828 switch (t->base()) { // Switch on original type | |
| 829 case AnyPtr: // Mixing with oops happens when javac | |
| 830 case RawPtr: // reuses local variables | |
| 831 case OopPtr: | |
| 832 case InstPtr: | |
| 833 case KlassPtr: | |
| 834 case AryPtr: | |
| 835 case Int: | |
| 836 case Long: | |
| 837 case DoubleTop: | |
| 838 case DoubleCon: | |
| 839 case DoubleBot: | |
| 840 case Bottom: // Ye Olde Default | |
| 841 return Type::BOTTOM; | |
| 842 | |
| 843 case FloatBot: | |
| 844 return t; | |
| 845 | |
| 846 default: // All else is a mistake | |
| 847 typerr(t); | |
| 848 | |
| 849 case FloatCon: // Float-constant vs Float-constant? | |
| 850 if( jint_cast(_f) != jint_cast(t->getf()) ) // unequal constants? | |
| 851 // must compare bitwise as positive zero, negative zero and NaN have | |
| 852 // all the same representation in C++ | |
| 853 return FLOAT; // Return generic float | |
| 854 // Equal constants | |
| 855 case Top: | |
| 856 case FloatTop: | |
| 857 break; // Return the float constant | |
| 858 } | |
| 859 return this; // Return the float constant | |
| 860 } | |
| 861 | |
| 862 //------------------------------xdual------------------------------------------ | |
| 863 // Dual: symmetric | |
| 864 const Type *TypeF::xdual() const { | |
| 865 return this; | |
| 866 } | |
| 867 | |
| 868 //------------------------------eq--------------------------------------------- | |
| 869 // Structural equality check for Type representations | |
| 870 bool TypeF::eq( const Type *t ) const { | |
| 871 if( g_isnan(_f) || | |
| 872 g_isnan(t->getf()) ) { | |
| 873 // One or both are NANs. If both are NANs return true, else false. | |
| 874 return (g_isnan(_f) && g_isnan(t->getf())); | |
| 875 } | |
| 876 if (_f == t->getf()) { | |
| 877 // (NaN is impossible at this point, since it is not equal even to itself) | |
| 878 if (_f == 0.0) { | |
| 879 // difference between positive and negative zero | |
| 880 if (jint_cast(_f) != jint_cast(t->getf())) return false; | |
| 881 } | |
| 882 return true; | |
| 883 } | |
| 884 return false; | |
| 885 } | |
| 886 | |
| 887 //------------------------------hash------------------------------------------- | |
| 888 // Type-specific hashing function. | |
| 889 int TypeF::hash(void) const { | |
| 890 return *(int*)(&_f); | |
| 891 } | |
| 892 | |
| 893 //------------------------------is_finite-------------------------------------- | |
| 894 // Has a finite value | |
| 895 bool TypeF::is_finite() const { | |
| 896 return g_isfinite(getf()) != 0; | |
| 897 } | |
| 898 | |
| 899 //------------------------------is_nan----------------------------------------- | |
| 900 // Is not a number (NaN) | |
| 901 bool TypeF::is_nan() const { | |
| 902 return g_isnan(getf()) != 0; | |
| 903 } | |
| 904 | |
| 905 //------------------------------dump2------------------------------------------ | |
| 906 // Dump float constant Type | |
| 907 #ifndef PRODUCT | |
| 908 void TypeF::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 909 Type::dump2(d,depth, st); | |
| 910 st->print("%f", _f); | |
| 911 } | |
| 912 #endif | |
| 913 | |
| 914 //------------------------------singleton-------------------------------------- | |
| 915 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
| 916 // constants (Ldi nodes). Singletons are integer, float or double constants | |
| 917 // or a single symbol. | |
| 918 bool TypeF::singleton(void) const { | |
| 919 return true; // Always a singleton | |
| 920 } | |
| 921 | |
| 922 bool TypeF::empty(void) const { | |
| 923 return false; // always exactly a singleton | |
| 924 } | |
| 925 | |
| 926 //============================================================================= | |
| 927 // Convenience common pre-built types. | |
| 928 const TypeD *TypeD::ZERO; // Floating point zero | |
| 929 const TypeD *TypeD::ONE; // Floating point one | |
| 930 | |
| 931 //------------------------------make------------------------------------------- | |
| 932 const TypeD *TypeD::make(double d) { | |
| 933 return (TypeD*)(new TypeD(d))->hashcons(); | |
| 934 } | |
| 935 | |
| 936 //------------------------------meet------------------------------------------- | |
| 937 // Compute the MEET of two types. It returns a new Type object. | |
| 938 const Type *TypeD::xmeet( const Type *t ) const { | |
| 939 // Perform a fast test for common case; meeting the same types together. | |
| 940 if( this == t ) return this; // Meeting same type-rep? | |
| 941 | |
| 942 // Current "this->_base" is DoubleCon | |
| 943 switch (t->base()) { // Switch on original type | |
| 944 case AnyPtr: // Mixing with oops happens when javac | |
| 945 case RawPtr: // reuses local variables | |
| 946 case OopPtr: | |
| 947 case InstPtr: | |
| 948 case KlassPtr: | |
| 949 case AryPtr: | |
|
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950 case NarrowOop: |
| 0 | 951 case Int: |
| 952 case Long: | |
| 953 case FloatTop: | |
| 954 case FloatCon: | |
| 955 case FloatBot: | |
| 956 case Bottom: // Ye Olde Default | |
| 957 return Type::BOTTOM; | |
| 958 | |
| 959 case DoubleBot: | |
| 960 return t; | |
| 961 | |
| 962 default: // All else is a mistake | |
| 963 typerr(t); | |
| 964 | |
| 965 case DoubleCon: // Double-constant vs Double-constant? | |
| 966 if( jlong_cast(_d) != jlong_cast(t->getd()) ) // unequal constants? (see comment in TypeF::xmeet) | |
| 967 return DOUBLE; // Return generic double | |
| 968 case Top: | |
| 969 case DoubleTop: | |
| 970 break; | |
| 971 } | |
| 972 return this; // Return the double constant | |
| 973 } | |
| 974 | |
| 975 //------------------------------xdual------------------------------------------ | |
| 976 // Dual: symmetric | |
| 977 const Type *TypeD::xdual() const { | |
| 978 return this; | |
| 979 } | |
| 980 | |
| 981 //------------------------------eq--------------------------------------------- | |
| 982 // Structural equality check for Type representations | |
| 983 bool TypeD::eq( const Type *t ) const { | |
| 984 if( g_isnan(_d) || | |
| 985 g_isnan(t->getd()) ) { | |
| 986 // One or both are NANs. If both are NANs return true, else false. | |
| 987 return (g_isnan(_d) && g_isnan(t->getd())); | |
| 988 } | |
| 989 if (_d == t->getd()) { | |
| 990 // (NaN is impossible at this point, since it is not equal even to itself) | |
| 991 if (_d == 0.0) { | |
| 992 // difference between positive and negative zero | |
| 993 if (jlong_cast(_d) != jlong_cast(t->getd())) return false; | |
| 994 } | |
| 995 return true; | |
| 996 } | |
| 997 return false; | |
| 998 } | |
| 999 | |
| 1000 //------------------------------hash------------------------------------------- | |
| 1001 // Type-specific hashing function. | |
| 1002 int TypeD::hash(void) const { | |
| 1003 return *(int*)(&_d); | |
| 1004 } | |
| 1005 | |
| 1006 //------------------------------is_finite-------------------------------------- | |
| 1007 // Has a finite value | |
| 1008 bool TypeD::is_finite() const { | |
| 1009 return g_isfinite(getd()) != 0; | |
| 1010 } | |
| 1011 | |
| 1012 //------------------------------is_nan----------------------------------------- | |
| 1013 // Is not a number (NaN) | |
| 1014 bool TypeD::is_nan() const { | |
| 1015 return g_isnan(getd()) != 0; | |
| 1016 } | |
| 1017 | |
| 1018 //------------------------------dump2------------------------------------------ | |
| 1019 // Dump double constant Type | |
| 1020 #ifndef PRODUCT | |
| 1021 void TypeD::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 1022 Type::dump2(d,depth,st); | |
| 1023 st->print("%f", _d); | |
| 1024 } | |
| 1025 #endif | |
| 1026 | |
| 1027 //------------------------------singleton-------------------------------------- | |
| 1028 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
| 1029 // constants (Ldi nodes). Singletons are integer, float or double constants | |
| 1030 // or a single symbol. | |
| 1031 bool TypeD::singleton(void) const { | |
| 1032 return true; // Always a singleton | |
| 1033 } | |
| 1034 | |
| 1035 bool TypeD::empty(void) const { | |
| 1036 return false; // always exactly a singleton | |
| 1037 } | |
| 1038 | |
| 1039 //============================================================================= | |
| 1040 // Convience common pre-built types. | |
| 1041 const TypeInt *TypeInt::MINUS_1;// -1 | |
| 1042 const TypeInt *TypeInt::ZERO; // 0 | |
| 1043 const TypeInt *TypeInt::ONE; // 1 | |
| 1044 const TypeInt *TypeInt::BOOL; // 0 or 1, FALSE or TRUE. | |
| 1045 const TypeInt *TypeInt::CC; // -1,0 or 1, condition codes | |
| 1046 const TypeInt *TypeInt::CC_LT; // [-1] == MINUS_1 | |
| 1047 const TypeInt *TypeInt::CC_GT; // [1] == ONE | |
| 1048 const TypeInt *TypeInt::CC_EQ; // [0] == ZERO | |
| 1049 const TypeInt *TypeInt::CC_LE; // [-1,0] | |
| 1050 const TypeInt *TypeInt::CC_GE; // [0,1] == BOOL (!) | |
| 1051 const TypeInt *TypeInt::BYTE; // Bytes, -128 to 127 | |
| 1052 const TypeInt *TypeInt::CHAR; // Java chars, 0-65535 | |
| 1053 const TypeInt *TypeInt::SHORT; // Java shorts, -32768-32767 | |
| 1054 const TypeInt *TypeInt::POS; // Positive 32-bit integers or zero | |
| 1055 const TypeInt *TypeInt::POS1; // Positive 32-bit integers | |
| 1056 const TypeInt *TypeInt::INT; // 32-bit integers | |
| 1057 const TypeInt *TypeInt::SYMINT; // symmetric range [-max_jint..max_jint] | |
| 1058 | |
| 1059 //------------------------------TypeInt---------------------------------------- | |
| 1060 TypeInt::TypeInt( jint lo, jint hi, int w ) : Type(Int), _lo(lo), _hi(hi), _widen(w) { | |
| 1061 } | |
| 1062 | |
| 1063 //------------------------------make------------------------------------------- | |
| 1064 const TypeInt *TypeInt::make( jint lo ) { | |
| 1065 return (TypeInt*)(new TypeInt(lo,lo,WidenMin))->hashcons(); | |
| 1066 } | |
| 1067 | |
| 1068 #define SMALLINT ((juint)3) // a value too insignificant to consider widening | |
| 1069 | |
| 1070 const TypeInt *TypeInt::make( jint lo, jint hi, int w ) { | |
| 1071 // Certain normalizations keep us sane when comparing types. | |
| 1072 // The 'SMALLINT' covers constants and also CC and its relatives. | |
| 1073 assert(CC == NULL || (juint)(CC->_hi - CC->_lo) <= SMALLINT, "CC is truly small"); | |
| 1074 if (lo <= hi) { | |
| 1075 if ((juint)(hi - lo) <= SMALLINT) w = Type::WidenMin; | |
| 1076 if ((juint)(hi - lo) >= max_juint) w = Type::WidenMax; // plain int | |
| 1077 } | |
| 1078 return (TypeInt*)(new TypeInt(lo,hi,w))->hashcons(); | |
| 1079 } | |
| 1080 | |
| 1081 //------------------------------meet------------------------------------------- | |
| 1082 // Compute the MEET of two types. It returns a new Type representation object | |
| 1083 // with reference count equal to the number of Types pointing at it. | |
| 1084 // Caller should wrap a Types around it. | |
| 1085 const Type *TypeInt::xmeet( const Type *t ) const { | |
| 1086 // Perform a fast test for common case; meeting the same types together. | |
| 1087 if( this == t ) return this; // Meeting same type? | |
| 1088 | |
| 1089 // Currently "this->_base" is a TypeInt | |
| 1090 switch (t->base()) { // Switch on original type | |
| 1091 case AnyPtr: // Mixing with oops happens when javac | |
| 1092 case RawPtr: // reuses local variables | |
| 1093 case OopPtr: | |
| 1094 case InstPtr: | |
| 1095 case KlassPtr: | |
| 1096 case AryPtr: | |
|
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1097 case NarrowOop: |
| 0 | 1098 case Long: |
| 1099 case FloatTop: | |
| 1100 case FloatCon: | |
| 1101 case FloatBot: | |
| 1102 case DoubleTop: | |
| 1103 case DoubleCon: | |
| 1104 case DoubleBot: | |
| 1105 case Bottom: // Ye Olde Default | |
| 1106 return Type::BOTTOM; | |
| 1107 default: // All else is a mistake | |
| 1108 typerr(t); | |
| 1109 case Top: // No change | |
| 1110 return this; | |
| 1111 case Int: // Int vs Int? | |
| 1112 break; | |
| 1113 } | |
| 1114 | |
| 1115 // Expand covered set | |
| 1116 const TypeInt *r = t->is_int(); | |
| 1117 // (Avoid TypeInt::make, to avoid the argument normalizations it enforces.) | |
| 1118 return (new TypeInt( MIN2(_lo,r->_lo), MAX2(_hi,r->_hi), MAX2(_widen,r->_widen) ))->hashcons(); | |
| 1119 } | |
| 1120 | |
| 1121 //------------------------------xdual------------------------------------------ | |
| 1122 // Dual: reverse hi & lo; flip widen | |
| 1123 const Type *TypeInt::xdual() const { | |
| 1124 return new TypeInt(_hi,_lo,WidenMax-_widen); | |
| 1125 } | |
| 1126 | |
| 1127 //------------------------------widen------------------------------------------ | |
| 1128 // Only happens for optimistic top-down optimizations. | |
| 1129 const Type *TypeInt::widen( const Type *old ) const { | |
| 1130 // Coming from TOP or such; no widening | |
| 1131 if( old->base() != Int ) return this; | |
| 1132 const TypeInt *ot = old->is_int(); | |
| 1133 | |
| 1134 // If new guy is equal to old guy, no widening | |
| 1135 if( _lo == ot->_lo && _hi == ot->_hi ) | |
| 1136 return old; | |
| 1137 | |
| 1138 // If new guy contains old, then we widened | |
| 1139 if( _lo <= ot->_lo && _hi >= ot->_hi ) { | |
| 1140 // New contains old | |
| 1141 // If new guy is already wider than old, no widening | |
| 1142 if( _widen > ot->_widen ) return this; | |
| 1143 // If old guy was a constant, do not bother | |
| 1144 if (ot->_lo == ot->_hi) return this; | |
| 1145 // Now widen new guy. | |
| 1146 // Check for widening too far | |
| 1147 if (_widen == WidenMax) { | |
| 1148 if (min_jint < _lo && _hi < max_jint) { | |
| 1149 // If neither endpoint is extremal yet, push out the endpoint | |
| 1150 // which is closer to its respective limit. | |
| 1151 if (_lo >= 0 || // easy common case | |
| 1152 (juint)(_lo - min_jint) >= (juint)(max_jint - _hi)) { | |
| 1153 // Try to widen to an unsigned range type of 31 bits: | |
| 1154 return make(_lo, max_jint, WidenMax); | |
| 1155 } else { | |
| 1156 return make(min_jint, _hi, WidenMax); | |
| 1157 } | |
| 1158 } | |
| 1159 return TypeInt::INT; | |
| 1160 } | |
| 1161 // Returned widened new guy | |
| 1162 return make(_lo,_hi,_widen+1); | |
| 1163 } | |
| 1164 | |
| 1165 // If old guy contains new, then we probably widened too far & dropped to | |
| 1166 // bottom. Return the wider fellow. | |
| 1167 if ( ot->_lo <= _lo && ot->_hi >= _hi ) | |
| 1168 return old; | |
| 1169 | |
| 1170 //fatal("Integer value range is not subset"); | |
| 1171 //return this; | |
| 1172 return TypeInt::INT; | |
| 1173 } | |
| 1174 | |
| 1175 //------------------------------narrow--------------------------------------- | |
| 1176 // Only happens for pessimistic optimizations. | |
| 1177 const Type *TypeInt::narrow( const Type *old ) const { | |
| 1178 if (_lo >= _hi) return this; // already narrow enough | |
| 1179 if (old == NULL) return this; | |
| 1180 const TypeInt* ot = old->isa_int(); | |
| 1181 if (ot == NULL) return this; | |
| 1182 jint olo = ot->_lo; | |
| 1183 jint ohi = ot->_hi; | |
| 1184 | |
| 1185 // If new guy is equal to old guy, no narrowing | |
| 1186 if (_lo == olo && _hi == ohi) return old; | |
| 1187 | |
| 1188 // If old guy was maximum range, allow the narrowing | |
| 1189 if (olo == min_jint && ohi == max_jint) return this; | |
| 1190 | |
| 1191 if (_lo < olo || _hi > ohi) | |
| 1192 return this; // doesn't narrow; pretty wierd | |
| 1193 | |
| 1194 // The new type narrows the old type, so look for a "death march". | |
| 1195 // See comments on PhaseTransform::saturate. | |
| 1196 juint nrange = _hi - _lo; | |
| 1197 juint orange = ohi - olo; | |
| 1198 if (nrange < max_juint - 1 && nrange > (orange >> 1) + (SMALLINT*2)) { | |
| 1199 // Use the new type only if the range shrinks a lot. | |
| 1200 // We do not want the optimizer computing 2^31 point by point. | |
| 1201 return old; | |
| 1202 } | |
| 1203 | |
| 1204 return this; | |
| 1205 } | |
| 1206 | |
| 1207 //-----------------------------filter------------------------------------------ | |
| 1208 const Type *TypeInt::filter( const Type *kills ) const { | |
| 1209 const TypeInt* ft = join(kills)->isa_int(); | |
| 1210 if (ft == NULL || ft->_lo > ft->_hi) | |
| 1211 return Type::TOP; // Canonical empty value | |
| 1212 if (ft->_widen < this->_widen) { | |
| 1213 // Do not allow the value of kill->_widen to affect the outcome. | |
| 1214 // The widen bits must be allowed to run freely through the graph. | |
| 1215 ft = TypeInt::make(ft->_lo, ft->_hi, this->_widen); | |
| 1216 } | |
| 1217 return ft; | |
| 1218 } | |
| 1219 | |
| 1220 //------------------------------eq--------------------------------------------- | |
| 1221 // Structural equality check for Type representations | |
| 1222 bool TypeInt::eq( const Type *t ) const { | |
| 1223 const TypeInt *r = t->is_int(); // Handy access | |
| 1224 return r->_lo == _lo && r->_hi == _hi && r->_widen == _widen; | |
| 1225 } | |
| 1226 | |
| 1227 //------------------------------hash------------------------------------------- | |
| 1228 // Type-specific hashing function. | |
| 1229 int TypeInt::hash(void) const { | |
| 1230 return _lo+_hi+_widen+(int)Type::Int; | |
| 1231 } | |
| 1232 | |
| 1233 //------------------------------is_finite-------------------------------------- | |
| 1234 // Has a finite value | |
| 1235 bool TypeInt::is_finite() const { | |
| 1236 return true; | |
| 1237 } | |
| 1238 | |
| 1239 //------------------------------dump2------------------------------------------ | |
| 1240 // Dump TypeInt | |
| 1241 #ifndef PRODUCT | |
| 1242 static const char* intname(char* buf, jint n) { | |
| 1243 if (n == min_jint) | |
| 1244 return "min"; | |
| 1245 else if (n < min_jint + 10000) | |
| 1246 sprintf(buf, "min+" INT32_FORMAT, n - min_jint); | |
| 1247 else if (n == max_jint) | |
| 1248 return "max"; | |
| 1249 else if (n > max_jint - 10000) | |
| 1250 sprintf(buf, "max-" INT32_FORMAT, max_jint - n); | |
| 1251 else | |
| 1252 sprintf(buf, INT32_FORMAT, n); | |
| 1253 return buf; | |
| 1254 } | |
| 1255 | |
| 1256 void TypeInt::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 1257 char buf[40], buf2[40]; | |
| 1258 if (_lo == min_jint && _hi == max_jint) | |
| 1259 st->print("int"); | |
| 1260 else if (is_con()) | |
| 1261 st->print("int:%s", intname(buf, get_con())); | |
| 1262 else if (_lo == BOOL->_lo && _hi == BOOL->_hi) | |
| 1263 st->print("bool"); | |
| 1264 else if (_lo == BYTE->_lo && _hi == BYTE->_hi) | |
| 1265 st->print("byte"); | |
| 1266 else if (_lo == CHAR->_lo && _hi == CHAR->_hi) | |
| 1267 st->print("char"); | |
| 1268 else if (_lo == SHORT->_lo && _hi == SHORT->_hi) | |
| 1269 st->print("short"); | |
| 1270 else if (_hi == max_jint) | |
| 1271 st->print("int:>=%s", intname(buf, _lo)); | |
| 1272 else if (_lo == min_jint) | |
| 1273 st->print("int:<=%s", intname(buf, _hi)); | |
| 1274 else | |
| 1275 st->print("int:%s..%s", intname(buf, _lo), intname(buf2, _hi)); | |
| 1276 | |
| 1277 if (_widen != 0 && this != TypeInt::INT) | |
| 1278 st->print(":%.*s", _widen, "wwww"); | |
| 1279 } | |
| 1280 #endif | |
| 1281 | |
| 1282 //------------------------------singleton-------------------------------------- | |
| 1283 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
| 1284 // constants. | |
| 1285 bool TypeInt::singleton(void) const { | |
| 1286 return _lo >= _hi; | |
| 1287 } | |
| 1288 | |
| 1289 bool TypeInt::empty(void) const { | |
| 1290 return _lo > _hi; | |
| 1291 } | |
| 1292 | |
| 1293 //============================================================================= | |
| 1294 // Convenience common pre-built types. | |
| 1295 const TypeLong *TypeLong::MINUS_1;// -1 | |
| 1296 const TypeLong *TypeLong::ZERO; // 0 | |
| 1297 const TypeLong *TypeLong::ONE; // 1 | |
| 1298 const TypeLong *TypeLong::POS; // >=0 | |
| 1299 const TypeLong *TypeLong::LONG; // 64-bit integers | |
| 1300 const TypeLong *TypeLong::INT; // 32-bit subrange | |
| 1301 const TypeLong *TypeLong::UINT; // 32-bit unsigned subrange | |
| 1302 | |
| 1303 //------------------------------TypeLong--------------------------------------- | |
| 1304 TypeLong::TypeLong( jlong lo, jlong hi, int w ) : Type(Long), _lo(lo), _hi(hi), _widen(w) { | |
| 1305 } | |
| 1306 | |
| 1307 //------------------------------make------------------------------------------- | |
| 1308 const TypeLong *TypeLong::make( jlong lo ) { | |
| 1309 return (TypeLong*)(new TypeLong(lo,lo,WidenMin))->hashcons(); | |
| 1310 } | |
| 1311 | |
| 1312 const TypeLong *TypeLong::make( jlong lo, jlong hi, int w ) { | |
| 1313 // Certain normalizations keep us sane when comparing types. | |
| 1314 // The '1' covers constants. | |
| 1315 if (lo <= hi) { | |
| 1316 if ((julong)(hi - lo) <= SMALLINT) w = Type::WidenMin; | |
| 1317 if ((julong)(hi - lo) >= max_julong) w = Type::WidenMax; // plain long | |
| 1318 } | |
| 1319 return (TypeLong*)(new TypeLong(lo,hi,w))->hashcons(); | |
| 1320 } | |
| 1321 | |
| 1322 | |
| 1323 //------------------------------meet------------------------------------------- | |
| 1324 // Compute the MEET of two types. It returns a new Type representation object | |
| 1325 // with reference count equal to the number of Types pointing at it. | |
| 1326 // Caller should wrap a Types around it. | |
| 1327 const Type *TypeLong::xmeet( const Type *t ) const { | |
| 1328 // Perform a fast test for common case; meeting the same types together. | |
| 1329 if( this == t ) return this; // Meeting same type? | |
| 1330 | |
| 1331 // Currently "this->_base" is a TypeLong | |
| 1332 switch (t->base()) { // Switch on original type | |
| 1333 case AnyPtr: // Mixing with oops happens when javac | |
| 1334 case RawPtr: // reuses local variables | |
| 1335 case OopPtr: | |
| 1336 case InstPtr: | |
| 1337 case KlassPtr: | |
| 1338 case AryPtr: | |
|
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1339 case NarrowOop: |
| 0 | 1340 case Int: |
| 1341 case FloatTop: | |
| 1342 case FloatCon: | |
| 1343 case FloatBot: | |
| 1344 case DoubleTop: | |
| 1345 case DoubleCon: | |
| 1346 case DoubleBot: | |
| 1347 case Bottom: // Ye Olde Default | |
| 1348 return Type::BOTTOM; | |
| 1349 default: // All else is a mistake | |
| 1350 typerr(t); | |
| 1351 case Top: // No change | |
| 1352 return this; | |
| 1353 case Long: // Long vs Long? | |
| 1354 break; | |
| 1355 } | |
| 1356 | |
| 1357 // Expand covered set | |
| 1358 const TypeLong *r = t->is_long(); // Turn into a TypeLong | |
| 1359 // (Avoid TypeLong::make, to avoid the argument normalizations it enforces.) | |
| 1360 return (new TypeLong( MIN2(_lo,r->_lo), MAX2(_hi,r->_hi), MAX2(_widen,r->_widen) ))->hashcons(); | |
| 1361 } | |
| 1362 | |
| 1363 //------------------------------xdual------------------------------------------ | |
| 1364 // Dual: reverse hi & lo; flip widen | |
| 1365 const Type *TypeLong::xdual() const { | |
| 1366 return new TypeLong(_hi,_lo,WidenMax-_widen); | |
| 1367 } | |
| 1368 | |
| 1369 //------------------------------widen------------------------------------------ | |
| 1370 // Only happens for optimistic top-down optimizations. | |
| 1371 const Type *TypeLong::widen( const Type *old ) const { | |
| 1372 // Coming from TOP or such; no widening | |
| 1373 if( old->base() != Long ) return this; | |
| 1374 const TypeLong *ot = old->is_long(); | |
| 1375 | |
| 1376 // If new guy is equal to old guy, no widening | |
| 1377 if( _lo == ot->_lo && _hi == ot->_hi ) | |
| 1378 return old; | |
| 1379 | |
| 1380 // If new guy contains old, then we widened | |
| 1381 if( _lo <= ot->_lo && _hi >= ot->_hi ) { | |
| 1382 // New contains old | |
| 1383 // If new guy is already wider than old, no widening | |
| 1384 if( _widen > ot->_widen ) return this; | |
| 1385 // If old guy was a constant, do not bother | |
| 1386 if (ot->_lo == ot->_hi) return this; | |
| 1387 // Now widen new guy. | |
| 1388 // Check for widening too far | |
| 1389 if (_widen == WidenMax) { | |
| 1390 if (min_jlong < _lo && _hi < max_jlong) { | |
| 1391 // If neither endpoint is extremal yet, push out the endpoint | |
| 1392 // which is closer to its respective limit. | |
| 1393 if (_lo >= 0 || // easy common case | |
| 1394 (julong)(_lo - min_jlong) >= (julong)(max_jlong - _hi)) { | |
| 1395 // Try to widen to an unsigned range type of 32/63 bits: | |
| 1396 if (_hi < max_juint) | |
| 1397 return make(_lo, max_juint, WidenMax); | |
| 1398 else | |
| 1399 return make(_lo, max_jlong, WidenMax); | |
| 1400 } else { | |
| 1401 return make(min_jlong, _hi, WidenMax); | |
| 1402 } | |
| 1403 } | |
| 1404 return TypeLong::LONG; | |
| 1405 } | |
| 1406 // Returned widened new guy | |
| 1407 return make(_lo,_hi,_widen+1); | |
| 1408 } | |
| 1409 | |
| 1410 // If old guy contains new, then we probably widened too far & dropped to | |
| 1411 // bottom. Return the wider fellow. | |
| 1412 if ( ot->_lo <= _lo && ot->_hi >= _hi ) | |
| 1413 return old; | |
| 1414 | |
| 1415 // fatal("Long value range is not subset"); | |
| 1416 // return this; | |
| 1417 return TypeLong::LONG; | |
| 1418 } | |
| 1419 | |
| 1420 //------------------------------narrow---------------------------------------- | |
| 1421 // Only happens for pessimistic optimizations. | |
| 1422 const Type *TypeLong::narrow( const Type *old ) const { | |
| 1423 if (_lo >= _hi) return this; // already narrow enough | |
| 1424 if (old == NULL) return this; | |
| 1425 const TypeLong* ot = old->isa_long(); | |
| 1426 if (ot == NULL) return this; | |
| 1427 jlong olo = ot->_lo; | |
| 1428 jlong ohi = ot->_hi; | |
| 1429 | |
| 1430 // If new guy is equal to old guy, no narrowing | |
| 1431 if (_lo == olo && _hi == ohi) return old; | |
| 1432 | |
| 1433 // If old guy was maximum range, allow the narrowing | |
| 1434 if (olo == min_jlong && ohi == max_jlong) return this; | |
| 1435 | |
| 1436 if (_lo < olo || _hi > ohi) | |
| 1437 return this; // doesn't narrow; pretty wierd | |
| 1438 | |
| 1439 // The new type narrows the old type, so look for a "death march". | |
| 1440 // See comments on PhaseTransform::saturate. | |
| 1441 julong nrange = _hi - _lo; | |
| 1442 julong orange = ohi - olo; | |
| 1443 if (nrange < max_julong - 1 && nrange > (orange >> 1) + (SMALLINT*2)) { | |
| 1444 // Use the new type only if the range shrinks a lot. | |
| 1445 // We do not want the optimizer computing 2^31 point by point. | |
| 1446 return old; | |
| 1447 } | |
| 1448 | |
| 1449 return this; | |
| 1450 } | |
| 1451 | |
| 1452 //-----------------------------filter------------------------------------------ | |
| 1453 const Type *TypeLong::filter( const Type *kills ) const { | |
| 1454 const TypeLong* ft = join(kills)->isa_long(); | |
| 1455 if (ft == NULL || ft->_lo > ft->_hi) | |
| 1456 return Type::TOP; // Canonical empty value | |
| 1457 if (ft->_widen < this->_widen) { | |
| 1458 // Do not allow the value of kill->_widen to affect the outcome. | |
| 1459 // The widen bits must be allowed to run freely through the graph. | |
| 1460 ft = TypeLong::make(ft->_lo, ft->_hi, this->_widen); | |
| 1461 } | |
| 1462 return ft; | |
| 1463 } | |
| 1464 | |
| 1465 //------------------------------eq--------------------------------------------- | |
| 1466 // Structural equality check for Type representations | |
| 1467 bool TypeLong::eq( const Type *t ) const { | |
| 1468 const TypeLong *r = t->is_long(); // Handy access | |
| 1469 return r->_lo == _lo && r->_hi == _hi && r->_widen == _widen; | |
| 1470 } | |
| 1471 | |
| 1472 //------------------------------hash------------------------------------------- | |
| 1473 // Type-specific hashing function. | |
| 1474 int TypeLong::hash(void) const { | |
| 1475 return (int)(_lo+_hi+_widen+(int)Type::Long); | |
| 1476 } | |
| 1477 | |
| 1478 //------------------------------is_finite-------------------------------------- | |
| 1479 // Has a finite value | |
| 1480 bool TypeLong::is_finite() const { | |
| 1481 return true; | |
| 1482 } | |
| 1483 | |
| 1484 //------------------------------dump2------------------------------------------ | |
| 1485 // Dump TypeLong | |
| 1486 #ifndef PRODUCT | |
| 1487 static const char* longnamenear(jlong x, const char* xname, char* buf, jlong n) { | |
| 1488 if (n > x) { | |
| 1489 if (n >= x + 10000) return NULL; | |
| 1490 sprintf(buf, "%s+" INT64_FORMAT, xname, n - x); | |
| 1491 } else if (n < x) { | |
| 1492 if (n <= x - 10000) return NULL; | |
| 1493 sprintf(buf, "%s-" INT64_FORMAT, xname, x - n); | |
| 1494 } else { | |
| 1495 return xname; | |
| 1496 } | |
| 1497 return buf; | |
| 1498 } | |
| 1499 | |
| 1500 static const char* longname(char* buf, jlong n) { | |
| 1501 const char* str; | |
| 1502 if (n == min_jlong) | |
| 1503 return "min"; | |
| 1504 else if (n < min_jlong + 10000) | |
| 1505 sprintf(buf, "min+" INT64_FORMAT, n - min_jlong); | |
| 1506 else if (n == max_jlong) | |
| 1507 return "max"; | |
| 1508 else if (n > max_jlong - 10000) | |
| 1509 sprintf(buf, "max-" INT64_FORMAT, max_jlong - n); | |
| 1510 else if ((str = longnamenear(max_juint, "maxuint", buf, n)) != NULL) | |
| 1511 return str; | |
| 1512 else if ((str = longnamenear(max_jint, "maxint", buf, n)) != NULL) | |
| 1513 return str; | |
| 1514 else if ((str = longnamenear(min_jint, "minint", buf, n)) != NULL) | |
| 1515 return str; | |
| 1516 else | |
| 1517 sprintf(buf, INT64_FORMAT, n); | |
| 1518 return buf; | |
| 1519 } | |
| 1520 | |
| 1521 void TypeLong::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 1522 char buf[80], buf2[80]; | |
| 1523 if (_lo == min_jlong && _hi == max_jlong) | |
| 1524 st->print("long"); | |
| 1525 else if (is_con()) | |
| 1526 st->print("long:%s", longname(buf, get_con())); | |
| 1527 else if (_hi == max_jlong) | |
| 1528 st->print("long:>=%s", longname(buf, _lo)); | |
| 1529 else if (_lo == min_jlong) | |
| 1530 st->print("long:<=%s", longname(buf, _hi)); | |
| 1531 else | |
| 1532 st->print("long:%s..%s", longname(buf, _lo), longname(buf2, _hi)); | |
| 1533 | |
| 1534 if (_widen != 0 && this != TypeLong::LONG) | |
| 1535 st->print(":%.*s", _widen, "wwww"); | |
| 1536 } | |
| 1537 #endif | |
| 1538 | |
| 1539 //------------------------------singleton-------------------------------------- | |
| 1540 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
| 1541 // constants | |
| 1542 bool TypeLong::singleton(void) const { | |
| 1543 return _lo >= _hi; | |
| 1544 } | |
| 1545 | |
| 1546 bool TypeLong::empty(void) const { | |
| 1547 return _lo > _hi; | |
| 1548 } | |
| 1549 | |
| 1550 //============================================================================= | |
| 1551 // Convenience common pre-built types. | |
| 1552 const TypeTuple *TypeTuple::IFBOTH; // Return both arms of IF as reachable | |
| 1553 const TypeTuple *TypeTuple::IFFALSE; | |
| 1554 const TypeTuple *TypeTuple::IFTRUE; | |
| 1555 const TypeTuple *TypeTuple::IFNEITHER; | |
| 1556 const TypeTuple *TypeTuple::LOOPBODY; | |
| 1557 const TypeTuple *TypeTuple::MEMBAR; | |
| 1558 const TypeTuple *TypeTuple::STORECONDITIONAL; | |
| 1559 const TypeTuple *TypeTuple::START_I2C; | |
| 1560 const TypeTuple *TypeTuple::INT_PAIR; | |
| 1561 const TypeTuple *TypeTuple::LONG_PAIR; | |
| 1562 | |
| 1563 | |
| 1564 //------------------------------make------------------------------------------- | |
| 1565 // Make a TypeTuple from the range of a method signature | |
| 1566 const TypeTuple *TypeTuple::make_range(ciSignature* sig) { | |
| 1567 ciType* return_type = sig->return_type(); | |
| 1568 uint total_fields = TypeFunc::Parms + return_type->size(); | |
| 1569 const Type **field_array = fields(total_fields); | |
| 1570 switch (return_type->basic_type()) { | |
| 1571 case T_LONG: | |
| 1572 field_array[TypeFunc::Parms] = TypeLong::LONG; | |
| 1573 field_array[TypeFunc::Parms+1] = Type::HALF; | |
| 1574 break; | |
| 1575 case T_DOUBLE: | |
| 1576 field_array[TypeFunc::Parms] = Type::DOUBLE; | |
| 1577 field_array[TypeFunc::Parms+1] = Type::HALF; | |
| 1578 break; | |
| 1579 case T_OBJECT: | |
| 1580 case T_ARRAY: | |
| 1581 case T_BOOLEAN: | |
| 1582 case T_CHAR: | |
| 1583 case T_FLOAT: | |
| 1584 case T_BYTE: | |
| 1585 case T_SHORT: | |
| 1586 case T_INT: | |
| 1587 field_array[TypeFunc::Parms] = get_const_type(return_type); | |
| 1588 break; | |
| 1589 case T_VOID: | |
| 1590 break; | |
| 1591 default: | |
| 1592 ShouldNotReachHere(); | |
| 1593 } | |
| 1594 return (TypeTuple*)(new TypeTuple(total_fields,field_array))->hashcons(); | |
| 1595 } | |
| 1596 | |
| 1597 // Make a TypeTuple from the domain of a method signature | |
| 1598 const TypeTuple *TypeTuple::make_domain(ciInstanceKlass* recv, ciSignature* sig) { | |
| 1599 uint total_fields = TypeFunc::Parms + sig->size(); | |
| 1600 | |
| 1601 uint pos = TypeFunc::Parms; | |
| 1602 const Type **field_array; | |
| 1603 if (recv != NULL) { | |
| 1604 total_fields++; | |
| 1605 field_array = fields(total_fields); | |
| 1606 // Use get_const_type here because it respects UseUniqueSubclasses: | |
| 1607 field_array[pos++] = get_const_type(recv)->join(TypePtr::NOTNULL); | |
| 1608 } else { | |
| 1609 field_array = fields(total_fields); | |
| 1610 } | |
| 1611 | |
| 1612 int i = 0; | |
| 1613 while (pos < total_fields) { | |
| 1614 ciType* type = sig->type_at(i); | |
| 1615 | |
| 1616 switch (type->basic_type()) { | |
| 1617 case T_LONG: | |
| 1618 field_array[pos++] = TypeLong::LONG; | |
| 1619 field_array[pos++] = Type::HALF; | |
| 1620 break; | |
| 1621 case T_DOUBLE: | |
| 1622 field_array[pos++] = Type::DOUBLE; | |
| 1623 field_array[pos++] = Type::HALF; | |
| 1624 break; | |
| 1625 case T_OBJECT: | |
| 1626 case T_ARRAY: | |
| 1627 case T_BOOLEAN: | |
| 1628 case T_CHAR: | |
| 1629 case T_FLOAT: | |
| 1630 case T_BYTE: | |
| 1631 case T_SHORT: | |
| 1632 case T_INT: | |
| 1633 field_array[pos++] = get_const_type(type); | |
| 1634 break; | |
| 1635 default: | |
| 1636 ShouldNotReachHere(); | |
| 1637 } | |
| 1638 i++; | |
| 1639 } | |
| 1640 return (TypeTuple*)(new TypeTuple(total_fields,field_array))->hashcons(); | |
| 1641 } | |
| 1642 | |
| 1643 const TypeTuple *TypeTuple::make( uint cnt, const Type **fields ) { | |
| 1644 return (TypeTuple*)(new TypeTuple(cnt,fields))->hashcons(); | |
| 1645 } | |
| 1646 | |
| 1647 //------------------------------fields----------------------------------------- | |
| 1648 // Subroutine call type with space allocated for argument types | |
| 1649 const Type **TypeTuple::fields( uint arg_cnt ) { | |
| 1650 const Type **flds = (const Type **)(Compile::current()->type_arena()->Amalloc_4((TypeFunc::Parms+arg_cnt)*sizeof(Type*) )); | |
| 1651 flds[TypeFunc::Control ] = Type::CONTROL; | |
| 1652 flds[TypeFunc::I_O ] = Type::ABIO; | |
| 1653 flds[TypeFunc::Memory ] = Type::MEMORY; | |
| 1654 flds[TypeFunc::FramePtr ] = TypeRawPtr::BOTTOM; | |
| 1655 flds[TypeFunc::ReturnAdr] = Type::RETURN_ADDRESS; | |
| 1656 | |
| 1657 return flds; | |
| 1658 } | |
| 1659 | |
| 1660 //------------------------------meet------------------------------------------- | |
| 1661 // Compute the MEET of two types. It returns a new Type object. | |
| 1662 const Type *TypeTuple::xmeet( const Type *t ) const { | |
| 1663 // Perform a fast test for common case; meeting the same types together. | |
| 1664 if( this == t ) return this; // Meeting same type-rep? | |
| 1665 | |
| 1666 // Current "this->_base" is Tuple | |
| 1667 switch (t->base()) { // switch on original type | |
| 1668 | |
| 1669 case Bottom: // Ye Olde Default | |
| 1670 return t; | |
| 1671 | |
| 1672 default: // All else is a mistake | |
| 1673 typerr(t); | |
| 1674 | |
| 1675 case Tuple: { // Meeting 2 signatures? | |
| 1676 const TypeTuple *x = t->is_tuple(); | |
| 1677 assert( _cnt == x->_cnt, "" ); | |
| 1678 const Type **fields = (const Type **)(Compile::current()->type_arena()->Amalloc_4( _cnt*sizeof(Type*) )); | |
| 1679 for( uint i=0; i<_cnt; i++ ) | |
| 1680 fields[i] = field_at(i)->xmeet( x->field_at(i) ); | |
| 1681 return TypeTuple::make(_cnt,fields); | |
| 1682 } | |
| 1683 case Top: | |
| 1684 break; | |
| 1685 } | |
| 1686 return this; // Return the double constant | |
| 1687 } | |
| 1688 | |
| 1689 //------------------------------xdual------------------------------------------ | |
| 1690 // Dual: compute field-by-field dual | |
| 1691 const Type *TypeTuple::xdual() const { | |
| 1692 const Type **fields = (const Type **)(Compile::current()->type_arena()->Amalloc_4( _cnt*sizeof(Type*) )); | |
| 1693 for( uint i=0; i<_cnt; i++ ) | |
| 1694 fields[i] = _fields[i]->dual(); | |
| 1695 return new TypeTuple(_cnt,fields); | |
| 1696 } | |
| 1697 | |
| 1698 //------------------------------eq--------------------------------------------- | |
| 1699 // Structural equality check for Type representations | |
| 1700 bool TypeTuple::eq( const Type *t ) const { | |
| 1701 const TypeTuple *s = (const TypeTuple *)t; | |
| 1702 if (_cnt != s->_cnt) return false; // Unequal field counts | |
| 1703 for (uint i = 0; i < _cnt; i++) | |
| 1704 if (field_at(i) != s->field_at(i)) // POINTER COMPARE! NO RECURSION! | |
| 1705 return false; // Missed | |
| 1706 return true; | |
| 1707 } | |
| 1708 | |
| 1709 //------------------------------hash------------------------------------------- | |
| 1710 // Type-specific hashing function. | |
| 1711 int TypeTuple::hash(void) const { | |
| 1712 intptr_t sum = _cnt; | |
| 1713 for( uint i=0; i<_cnt; i++ ) | |
| 1714 sum += (intptr_t)_fields[i]; // Hash on pointers directly | |
| 1715 return sum; | |
| 1716 } | |
| 1717 | |
| 1718 //------------------------------dump2------------------------------------------ | |
| 1719 // Dump signature Type | |
| 1720 #ifndef PRODUCT | |
| 1721 void TypeTuple::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 1722 st->print("{"); | |
| 1723 if( !depth || d[this] ) { // Check for recursive print | |
| 1724 st->print("...}"); | |
| 1725 return; | |
| 1726 } | |
| 1727 d.Insert((void*)this, (void*)this); // Stop recursion | |
| 1728 if( _cnt ) { | |
| 1729 uint i; | |
| 1730 for( i=0; i<_cnt-1; i++ ) { | |
| 1731 st->print("%d:", i); | |
| 1732 _fields[i]->dump2(d, depth-1, st); | |
| 1733 st->print(", "); | |
| 1734 } | |
| 1735 st->print("%d:", i); | |
| 1736 _fields[i]->dump2(d, depth-1, st); | |
| 1737 } | |
| 1738 st->print("}"); | |
| 1739 } | |
| 1740 #endif | |
| 1741 | |
| 1742 //------------------------------singleton-------------------------------------- | |
| 1743 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
| 1744 // constants (Ldi nodes). Singletons are integer, float or double constants | |
| 1745 // or a single symbol. | |
| 1746 bool TypeTuple::singleton(void) const { | |
| 1747 return false; // Never a singleton | |
| 1748 } | |
| 1749 | |
| 1750 bool TypeTuple::empty(void) const { | |
| 1751 for( uint i=0; i<_cnt; i++ ) { | |
| 1752 if (_fields[i]->empty()) return true; | |
| 1753 } | |
| 1754 return false; | |
| 1755 } | |
| 1756 | |
| 1757 //============================================================================= | |
| 1758 // Convenience common pre-built types. | |
| 1759 | |
| 1760 inline const TypeInt* normalize_array_size(const TypeInt* size) { | |
| 1761 // Certain normalizations keep us sane when comparing types. | |
| 1762 // We do not want arrayOop variables to differ only by the wideness | |
| 1763 // of their index types. Pick minimum wideness, since that is the | |
| 1764 // forced wideness of small ranges anyway. | |
| 1765 if (size->_widen != Type::WidenMin) | |
| 1766 return TypeInt::make(size->_lo, size->_hi, Type::WidenMin); | |
| 1767 else | |
| 1768 return size; | |
| 1769 } | |
| 1770 | |
| 1771 //------------------------------make------------------------------------------- | |
| 1772 const TypeAry *TypeAry::make( const Type *elem, const TypeInt *size) { | |
|
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1773 if (UseCompressedOops && elem->isa_oopptr()) { |
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1774 elem = elem->make_narrowoop(); |
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1775 } |
| 0 | 1776 size = normalize_array_size(size); |
| 1777 return (TypeAry*)(new TypeAry(elem,size))->hashcons(); | |
| 1778 } | |
| 1779 | |
| 1780 //------------------------------meet------------------------------------------- | |
| 1781 // Compute the MEET of two types. It returns a new Type object. | |
| 1782 const Type *TypeAry::xmeet( const Type *t ) const { | |
| 1783 // Perform a fast test for common case; meeting the same types together. | |
| 1784 if( this == t ) return this; // Meeting same type-rep? | |
| 1785 | |
| 1786 // Current "this->_base" is Ary | |
| 1787 switch (t->base()) { // switch on original type | |
| 1788 | |
| 1789 case Bottom: // Ye Olde Default | |
| 1790 return t; | |
| 1791 | |
| 1792 default: // All else is a mistake | |
| 1793 typerr(t); | |
| 1794 | |
| 1795 case Array: { // Meeting 2 arrays? | |
| 1796 const TypeAry *a = t->is_ary(); | |
| 1797 return TypeAry::make(_elem->meet(a->_elem), | |
| 1798 _size->xmeet(a->_size)->is_int()); | |
| 1799 } | |
| 1800 case Top: | |
| 1801 break; | |
| 1802 } | |
| 1803 return this; // Return the double constant | |
| 1804 } | |
| 1805 | |
| 1806 //------------------------------xdual------------------------------------------ | |
| 1807 // Dual: compute field-by-field dual | |
| 1808 const Type *TypeAry::xdual() const { | |
| 1809 const TypeInt* size_dual = _size->dual()->is_int(); | |
| 1810 size_dual = normalize_array_size(size_dual); | |
| 1811 return new TypeAry( _elem->dual(), size_dual); | |
| 1812 } | |
| 1813 | |
| 1814 //------------------------------eq--------------------------------------------- | |
| 1815 // Structural equality check for Type representations | |
| 1816 bool TypeAry::eq( const Type *t ) const { | |
| 1817 const TypeAry *a = (const TypeAry*)t; | |
| 1818 return _elem == a->_elem && | |
| 1819 _size == a->_size; | |
| 1820 } | |
| 1821 | |
| 1822 //------------------------------hash------------------------------------------- | |
| 1823 // Type-specific hashing function. | |
| 1824 int TypeAry::hash(void) const { | |
| 1825 return (intptr_t)_elem + (intptr_t)_size; | |
| 1826 } | |
| 1827 | |
| 1828 //------------------------------dump2------------------------------------------ | |
| 1829 #ifndef PRODUCT | |
| 1830 void TypeAry::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 1831 _elem->dump2(d, depth, st); | |
| 1832 st->print("["); | |
| 1833 _size->dump2(d, depth, st); | |
| 1834 st->print("]"); | |
| 1835 } | |
| 1836 #endif | |
| 1837 | |
| 1838 //------------------------------singleton-------------------------------------- | |
| 1839 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
| 1840 // constants (Ldi nodes). Singletons are integer, float or double constants | |
| 1841 // or a single symbol. | |
| 1842 bool TypeAry::singleton(void) const { | |
| 1843 return false; // Never a singleton | |
| 1844 } | |
| 1845 | |
| 1846 bool TypeAry::empty(void) const { | |
| 1847 return _elem->empty() || _size->empty(); | |
| 1848 } | |
| 1849 | |
| 1850 //--------------------------ary_must_be_exact---------------------------------- | |
| 1851 bool TypeAry::ary_must_be_exact() const { | |
| 1852 if (!UseExactTypes) return false; | |
| 1853 // This logic looks at the element type of an array, and returns true | |
| 1854 // if the element type is either a primitive or a final instance class. | |
| 1855 // In such cases, an array built on this ary must have no subclasses. | |
| 1856 if (_elem == BOTTOM) return false; // general array not exact | |
| 1857 if (_elem == TOP ) return false; // inverted general array not exact | |
|
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1858 const TypeOopPtr* toop = NULL; |
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1859 if (UseCompressedOops && _elem->isa_narrowoop()) { |
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1860 toop = _elem->make_ptr()->isa_oopptr(); |
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1861 } else { |
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1862 toop = _elem->isa_oopptr(); |
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1863 } |
| 0 | 1864 if (!toop) return true; // a primitive type, like int |
| 1865 ciKlass* tklass = toop->klass(); | |
| 1866 if (tklass == NULL) return false; // unloaded class | |
| 1867 if (!tklass->is_loaded()) return false; // unloaded class | |
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1868 const TypeInstPtr* tinst; |
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1869 if (_elem->isa_narrowoop()) |
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1870 tinst = _elem->make_ptr()->isa_instptr(); |
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1871 else |
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1872 tinst = _elem->isa_instptr(); |
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1873 if (tinst) |
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1874 return tklass->as_instance_klass()->is_final(); |
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1875 const TypeAryPtr* tap; |
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1876 if (_elem->isa_narrowoop()) |
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1877 tap = _elem->make_ptr()->isa_aryptr(); |
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1878 else |
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1879 tap = _elem->isa_aryptr(); |
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1880 if (tap) |
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1881 return tap->ary()->ary_must_be_exact(); |
| 0 | 1882 return false; |
| 1883 } | |
| 1884 | |
| 1885 //============================================================================= | |
| 1886 // Convenience common pre-built types. | |
| 1887 const TypePtr *TypePtr::NULL_PTR; | |
| 1888 const TypePtr *TypePtr::NOTNULL; | |
| 1889 const TypePtr *TypePtr::BOTTOM; | |
| 1890 | |
| 1891 //------------------------------meet------------------------------------------- | |
| 1892 // Meet over the PTR enum | |
| 1893 const TypePtr::PTR TypePtr::ptr_meet[TypePtr::lastPTR][TypePtr::lastPTR] = { | |
| 1894 // TopPTR, AnyNull, Constant, Null, NotNull, BotPTR, | |
| 1895 { /* Top */ TopPTR, AnyNull, Constant, Null, NotNull, BotPTR,}, | |
| 1896 { /* AnyNull */ AnyNull, AnyNull, Constant, BotPTR, NotNull, BotPTR,}, | |
| 1897 { /* Constant*/ Constant, Constant, Constant, BotPTR, NotNull, BotPTR,}, | |
| 1898 { /* Null */ Null, BotPTR, BotPTR, Null, BotPTR, BotPTR,}, | |
| 1899 { /* NotNull */ NotNull, NotNull, NotNull, BotPTR, NotNull, BotPTR,}, | |
| 1900 { /* BotPTR */ BotPTR, BotPTR, BotPTR, BotPTR, BotPTR, BotPTR,} | |
| 1901 }; | |
| 1902 | |
| 1903 //------------------------------make------------------------------------------- | |
| 1904 const TypePtr *TypePtr::make( TYPES t, enum PTR ptr, int offset ) { | |
| 1905 return (TypePtr*)(new TypePtr(t,ptr,offset))->hashcons(); | |
| 1906 } | |
| 1907 | |
| 1908 //------------------------------cast_to_ptr_type------------------------------- | |
| 1909 const Type *TypePtr::cast_to_ptr_type(PTR ptr) const { | |
| 1910 assert(_base == AnyPtr, "subclass must override cast_to_ptr_type"); | |
| 1911 if( ptr == _ptr ) return this; | |
| 1912 return make(_base, ptr, _offset); | |
| 1913 } | |
| 1914 | |
| 1915 //------------------------------get_con---------------------------------------- | |
| 1916 intptr_t TypePtr::get_con() const { | |
| 1917 assert( _ptr == Null, "" ); | |
| 1918 return _offset; | |
| 1919 } | |
| 1920 | |
| 1921 //------------------------------meet------------------------------------------- | |
| 1922 // Compute the MEET of two types. It returns a new Type object. | |
| 1923 const Type *TypePtr::xmeet( const Type *t ) const { | |
| 1924 // Perform a fast test for common case; meeting the same types together. | |
| 1925 if( this == t ) return this; // Meeting same type-rep? | |
| 1926 | |
| 1927 // Current "this->_base" is AnyPtr | |
| 1928 switch (t->base()) { // switch on original type | |
| 1929 case Int: // Mixing ints & oops happens when javac | |
| 1930 case Long: // reuses local variables | |
| 1931 case FloatTop: | |
| 1932 case FloatCon: | |
| 1933 case FloatBot: | |
| 1934 case DoubleTop: | |
| 1935 case DoubleCon: | |
| 1936 case DoubleBot: | |
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1937 case NarrowOop: |
| 0 | 1938 case Bottom: // Ye Olde Default |
| 1939 return Type::BOTTOM; | |
| 1940 case Top: | |
| 1941 return this; | |
| 1942 | |
| 1943 case AnyPtr: { // Meeting to AnyPtrs | |
| 1944 const TypePtr *tp = t->is_ptr(); | |
| 1945 return make( AnyPtr, meet_ptr(tp->ptr()), meet_offset(tp->offset()) ); | |
| 1946 } | |
| 1947 case RawPtr: // For these, flip the call around to cut down | |
| 1948 case OopPtr: | |
| 1949 case InstPtr: // on the cases I have to handle. | |
| 1950 case KlassPtr: | |
| 1951 case AryPtr: | |
| 1952 return t->xmeet(this); // Call in reverse direction | |
| 1953 default: // All else is a mistake | |
| 1954 typerr(t); | |
| 1955 | |
| 1956 } | |
| 1957 return this; | |
| 1958 } | |
| 1959 | |
| 1960 //------------------------------meet_offset------------------------------------ | |
| 1961 int TypePtr::meet_offset( int offset ) const { | |
| 1962 // Either is 'TOP' offset? Return the other offset! | |
| 1963 if( _offset == OffsetTop ) return offset; | |
| 1964 if( offset == OffsetTop ) return _offset; | |
| 1965 // If either is different, return 'BOTTOM' offset | |
| 1966 if( _offset != offset ) return OffsetBot; | |
| 1967 return _offset; | |
| 1968 } | |
| 1969 | |
| 1970 //------------------------------dual_offset------------------------------------ | |
| 1971 int TypePtr::dual_offset( ) const { | |
| 1972 if( _offset == OffsetTop ) return OffsetBot;// Map 'TOP' into 'BOTTOM' | |
| 1973 if( _offset == OffsetBot ) return OffsetTop;// Map 'BOTTOM' into 'TOP' | |
| 1974 return _offset; // Map everything else into self | |
| 1975 } | |
| 1976 | |
| 1977 //------------------------------xdual------------------------------------------ | |
| 1978 // Dual: compute field-by-field dual | |
| 1979 const TypePtr::PTR TypePtr::ptr_dual[TypePtr::lastPTR] = { | |
| 1980 BotPTR, NotNull, Constant, Null, AnyNull, TopPTR | |
| 1981 }; | |
| 1982 const Type *TypePtr::xdual() const { | |
| 1983 return new TypePtr( AnyPtr, dual_ptr(), dual_offset() ); | |
| 1984 } | |
| 1985 | |
| 1986 //------------------------------add_offset------------------------------------- | |
| 1987 const TypePtr *TypePtr::add_offset( int offset ) const { | |
| 1988 if( offset == 0 ) return this; // No change | |
| 1989 if( _offset == OffsetBot ) return this; | |
| 1990 if( offset == OffsetBot ) offset = OffsetBot; | |
| 1991 else if( _offset == OffsetTop || offset == OffsetTop ) offset = OffsetTop; | |
| 1992 else offset += _offset; | |
| 1993 return make( AnyPtr, _ptr, offset ); | |
| 1994 } | |
| 1995 | |
| 1996 //------------------------------eq--------------------------------------------- | |
| 1997 // Structural equality check for Type representations | |
| 1998 bool TypePtr::eq( const Type *t ) const { | |
| 1999 const TypePtr *a = (const TypePtr*)t; | |
| 2000 return _ptr == a->ptr() && _offset == a->offset(); | |
| 2001 } | |
| 2002 | |
| 2003 //------------------------------hash------------------------------------------- | |
| 2004 // Type-specific hashing function. | |
| 2005 int TypePtr::hash(void) const { | |
| 2006 return _ptr + _offset; | |
| 2007 } | |
| 2008 | |
| 2009 //------------------------------dump2------------------------------------------ | |
| 2010 const char *const TypePtr::ptr_msg[TypePtr::lastPTR] = { | |
| 2011 "TopPTR","AnyNull","Constant","NULL","NotNull","BotPTR" | |
| 2012 }; | |
| 2013 | |
| 2014 #ifndef PRODUCT | |
| 2015 void TypePtr::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 2016 if( _ptr == Null ) st->print("NULL"); | |
| 2017 else st->print("%s *", ptr_msg[_ptr]); | |
| 2018 if( _offset == OffsetTop ) st->print("+top"); | |
| 2019 else if( _offset == OffsetBot ) st->print("+bot"); | |
| 2020 else if( _offset ) st->print("+%d", _offset); | |
| 2021 } | |
| 2022 #endif | |
| 2023 | |
| 2024 //------------------------------singleton-------------------------------------- | |
| 2025 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
| 2026 // constants | |
| 2027 bool TypePtr::singleton(void) const { | |
| 2028 // TopPTR, Null, AnyNull, Constant are all singletons | |
| 2029 return (_offset != OffsetBot) && !below_centerline(_ptr); | |
| 2030 } | |
| 2031 | |
| 2032 bool TypePtr::empty(void) const { | |
| 2033 return (_offset == OffsetTop) || above_centerline(_ptr); | |
| 2034 } | |
| 2035 | |
| 2036 //============================================================================= | |
| 2037 // Convenience common pre-built types. | |
| 2038 const TypeRawPtr *TypeRawPtr::BOTTOM; | |
| 2039 const TypeRawPtr *TypeRawPtr::NOTNULL; | |
| 2040 | |
| 2041 //------------------------------make------------------------------------------- | |
| 2042 const TypeRawPtr *TypeRawPtr::make( enum PTR ptr ) { | |
| 2043 assert( ptr != Constant, "what is the constant?" ); | |
| 2044 assert( ptr != Null, "Use TypePtr for NULL" ); | |
| 2045 return (TypeRawPtr*)(new TypeRawPtr(ptr,0))->hashcons(); | |
| 2046 } | |
| 2047 | |
| 2048 const TypeRawPtr *TypeRawPtr::make( address bits ) { | |
| 2049 assert( bits, "Use TypePtr for NULL" ); | |
| 2050 return (TypeRawPtr*)(new TypeRawPtr(Constant,bits))->hashcons(); | |
| 2051 } | |
| 2052 | |
| 2053 //------------------------------cast_to_ptr_type------------------------------- | |
| 2054 const Type *TypeRawPtr::cast_to_ptr_type(PTR ptr) const { | |
| 2055 assert( ptr != Constant, "what is the constant?" ); | |
| 2056 assert( ptr != Null, "Use TypePtr for NULL" ); | |
| 2057 assert( _bits==0, "Why cast a constant address?"); | |
| 2058 if( ptr == _ptr ) return this; | |
| 2059 return make(ptr); | |
| 2060 } | |
| 2061 | |
| 2062 //------------------------------get_con---------------------------------------- | |
| 2063 intptr_t TypeRawPtr::get_con() const { | |
| 2064 assert( _ptr == Null || _ptr == Constant, "" ); | |
| 2065 return (intptr_t)_bits; | |
| 2066 } | |
| 2067 | |
| 2068 //------------------------------meet------------------------------------------- | |
| 2069 // Compute the MEET of two types. It returns a new Type object. | |
| 2070 const Type *TypeRawPtr::xmeet( const Type *t ) const { | |
| 2071 // Perform a fast test for common case; meeting the same types together. | |
| 2072 if( this == t ) return this; // Meeting same type-rep? | |
| 2073 | |
| 2074 // Current "this->_base" is RawPtr | |
| 2075 switch( t->base() ) { // switch on original type | |
| 2076 case Bottom: // Ye Olde Default | |
| 2077 return t; | |
| 2078 case Top: | |
| 2079 return this; | |
| 2080 case AnyPtr: // Meeting to AnyPtrs | |
| 2081 break; | |
| 2082 case RawPtr: { // might be top, bot, any/not or constant | |
| 2083 enum PTR tptr = t->is_ptr()->ptr(); | |
| 2084 enum PTR ptr = meet_ptr( tptr ); | |
| 2085 if( ptr == Constant ) { // Cannot be equal constants, so... | |
| 2086 if( tptr == Constant && _ptr != Constant) return t; | |
| 2087 if( _ptr == Constant && tptr != Constant) return this; | |
| 2088 ptr = NotNull; // Fall down in lattice | |
| 2089 } | |
| 2090 return make( ptr ); | |
| 2091 } | |
| 2092 | |
| 2093 case OopPtr: | |
| 2094 case InstPtr: | |
| 2095 case KlassPtr: | |
| 2096 case AryPtr: | |
| 2097 return TypePtr::BOTTOM; // Oop meet raw is not well defined | |
| 2098 default: // All else is a mistake | |
| 2099 typerr(t); | |
| 2100 } | |
| 2101 | |
| 2102 // Found an AnyPtr type vs self-RawPtr type | |
| 2103 const TypePtr *tp = t->is_ptr(); | |
| 2104 switch (tp->ptr()) { | |
| 2105 case TypePtr::TopPTR: return this; | |
| 2106 case TypePtr::BotPTR: return t; | |
| 2107 case TypePtr::Null: | |
| 2108 if( _ptr == TypePtr::TopPTR ) return t; | |
| 2109 return TypeRawPtr::BOTTOM; | |
| 2110 case TypePtr::NotNull: return TypePtr::make( AnyPtr, meet_ptr(TypePtr::NotNull), tp->meet_offset(0) ); | |
| 2111 case TypePtr::AnyNull: | |
| 2112 if( _ptr == TypePtr::Constant) return this; | |
| 2113 return make( meet_ptr(TypePtr::AnyNull) ); | |
| 2114 default: ShouldNotReachHere(); | |
| 2115 } | |
| 2116 return this; | |
| 2117 } | |
| 2118 | |
| 2119 //------------------------------xdual------------------------------------------ | |
| 2120 // Dual: compute field-by-field dual | |
| 2121 const Type *TypeRawPtr::xdual() const { | |
| 2122 return new TypeRawPtr( dual_ptr(), _bits ); | |
| 2123 } | |
| 2124 | |
| 2125 //------------------------------add_offset------------------------------------- | |
| 2126 const TypePtr *TypeRawPtr::add_offset( int offset ) const { | |
| 2127 if( offset == OffsetTop ) return BOTTOM; // Undefined offset-> undefined pointer | |
| 2128 if( offset == OffsetBot ) return BOTTOM; // Unknown offset-> unknown pointer | |
| 2129 if( offset == 0 ) return this; // No change | |
| 2130 switch (_ptr) { | |
| 2131 case TypePtr::TopPTR: | |
| 2132 case TypePtr::BotPTR: | |
| 2133 case TypePtr::NotNull: | |
| 2134 return this; | |
| 2135 case TypePtr::Null: | |
| 2136 case TypePtr::Constant: | |
| 2137 return make( _bits+offset ); | |
| 2138 default: ShouldNotReachHere(); | |
| 2139 } | |
| 2140 return NULL; // Lint noise | |
| 2141 } | |
| 2142 | |
| 2143 //------------------------------eq--------------------------------------------- | |
| 2144 // Structural equality check for Type representations | |
| 2145 bool TypeRawPtr::eq( const Type *t ) const { | |
| 2146 const TypeRawPtr *a = (const TypeRawPtr*)t; | |
| 2147 return _bits == a->_bits && TypePtr::eq(t); | |
| 2148 } | |
| 2149 | |
| 2150 //------------------------------hash------------------------------------------- | |
| 2151 // Type-specific hashing function. | |
| 2152 int TypeRawPtr::hash(void) const { | |
| 2153 return (intptr_t)_bits + TypePtr::hash(); | |
| 2154 } | |
| 2155 | |
| 2156 //------------------------------dump2------------------------------------------ | |
| 2157 #ifndef PRODUCT | |
| 2158 void TypeRawPtr::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 2159 if( _ptr == Constant ) | |
| 2160 st->print(INTPTR_FORMAT, _bits); | |
| 2161 else | |
| 2162 st->print("rawptr:%s", ptr_msg[_ptr]); | |
| 2163 } | |
| 2164 #endif | |
| 2165 | |
| 2166 //============================================================================= | |
| 2167 // Convenience common pre-built type. | |
| 2168 const TypeOopPtr *TypeOopPtr::BOTTOM; | |
| 2169 | |
| 163 | 2170 //------------------------------TypeOopPtr------------------------------------- |
| 2171 TypeOopPtr::TypeOopPtr( TYPES t, PTR ptr, ciKlass* k, bool xk, ciObject* o, int offset, int instance_id ) | |
| 2172 : TypePtr(t, ptr, offset), | |
| 2173 _const_oop(o), _klass(k), | |
| 2174 _klass_is_exact(xk), | |
| 2175 _is_ptr_to_narrowoop(false), | |
| 2176 _instance_id(instance_id) { | |
| 2177 #ifdef _LP64 | |
| 2178 if (UseCompressedOops && _offset != 0) { | |
| 2179 if (klass() == NULL) { | |
| 2180 assert(this->isa_aryptr(), "only arrays without klass"); | |
| 2181 _is_ptr_to_narrowoop = true; | |
| 2182 } else if (_offset == oopDesc::klass_offset_in_bytes()) { | |
| 2183 _is_ptr_to_narrowoop = true; | |
| 2184 } else if (this->isa_aryptr()) { | |
| 2185 _is_ptr_to_narrowoop = (klass()->is_obj_array_klass() && | |
| 2186 _offset != arrayOopDesc::length_offset_in_bytes()); | |
| 2187 } else if (klass() == ciEnv::current()->Class_klass() && | |
| 2188 (_offset == java_lang_Class::klass_offset_in_bytes() || | |
| 2189 _offset == java_lang_Class::array_klass_offset_in_bytes())) { | |
| 2190 // Special hidden fields from the Class. | |
| 2191 assert(this->isa_instptr(), "must be an instance ptr."); | |
| 2192 _is_ptr_to_narrowoop = true; | |
| 2193 } else if (klass()->is_instance_klass()) { | |
| 2194 ciInstanceKlass* ik = klass()->as_instance_klass(); | |
| 2195 ciField* field = NULL; | |
| 2196 if (this->isa_klassptr()) { | |
| 2197 // Perm objects don't use compressed references, except for | |
| 2198 // static fields which are currently compressed. | |
| 2199 field = ik->get_field_by_offset(_offset, true); | |
| 2200 if (field != NULL) { | |
| 2201 BasicType basic_elem_type = field->layout_type(); | |
| 2202 _is_ptr_to_narrowoop = (basic_elem_type == T_OBJECT || | |
| 2203 basic_elem_type == T_ARRAY); | |
| 2204 } | |
| 2205 } else if (_offset == OffsetBot || _offset == OffsetTop) { | |
| 2206 // unsafe access | |
| 2207 _is_ptr_to_narrowoop = true; | |
| 2208 } else { // exclude unsafe ops | |
| 2209 assert(this->isa_instptr(), "must be an instance ptr."); | |
| 2210 // Field which contains a compressed oop references. | |
| 2211 field = ik->get_field_by_offset(_offset, false); | |
| 2212 if (field != NULL) { | |
| 2213 BasicType basic_elem_type = field->layout_type(); | |
| 2214 _is_ptr_to_narrowoop = (basic_elem_type == T_OBJECT || | |
| 2215 basic_elem_type == T_ARRAY); | |
| 2216 } else if (klass()->equals(ciEnv::current()->Object_klass())) { | |
| 2217 // Compile::find_alias_type() cast exactness on all types to verify | |
| 2218 // that it does not affect alias type. | |
| 2219 _is_ptr_to_narrowoop = true; | |
| 2220 } else { | |
| 2221 // Type for the copy start in LibraryCallKit::inline_native_clone(). | |
| 2222 assert(!klass_is_exact(), "only non-exact klass"); | |
| 2223 _is_ptr_to_narrowoop = true; | |
| 2224 } | |
| 2225 } | |
| 2226 } | |
| 2227 } | |
| 2228 #endif | |
| 2229 } | |
| 2230 | |
| 0 | 2231 //------------------------------make------------------------------------------- |
| 2232 const TypeOopPtr *TypeOopPtr::make(PTR ptr, | |
| 2233 int offset) { | |
| 2234 assert(ptr != Constant, "no constant generic pointers"); | |
| 2235 ciKlass* k = ciKlassKlass::make(); | |
| 2236 bool xk = false; | |
| 2237 ciObject* o = NULL; | |
| 2238 return (TypeOopPtr*)(new TypeOopPtr(OopPtr, ptr, k, xk, o, offset, UNKNOWN_INSTANCE))->hashcons(); | |
| 2239 } | |
| 2240 | |
| 2241 | |
| 2242 //------------------------------cast_to_ptr_type------------------------------- | |
| 2243 const Type *TypeOopPtr::cast_to_ptr_type(PTR ptr) const { | |
| 2244 assert(_base == OopPtr, "subclass must override cast_to_ptr_type"); | |
| 2245 if( ptr == _ptr ) return this; | |
| 2246 return make(ptr, _offset); | |
| 2247 } | |
| 2248 | |
| 2249 //-----------------------------cast_to_instance------------------------------- | |
| 2250 const TypeOopPtr *TypeOopPtr::cast_to_instance(int instance_id) const { | |
| 2251 // There are no instances of a general oop. | |
| 2252 // Return self unchanged. | |
| 2253 return this; | |
| 2254 } | |
| 2255 | |
| 2256 //-----------------------------cast_to_exactness------------------------------- | |
| 2257 const Type *TypeOopPtr::cast_to_exactness(bool klass_is_exact) const { | |
| 2258 // There is no such thing as an exact general oop. | |
| 2259 // Return self unchanged. | |
| 2260 return this; | |
| 2261 } | |
| 2262 | |
| 2263 | |
| 2264 //------------------------------as_klass_type---------------------------------- | |
| 2265 // Return the klass type corresponding to this instance or array type. | |
| 2266 // It is the type that is loaded from an object of this type. | |
| 2267 const TypeKlassPtr* TypeOopPtr::as_klass_type() const { | |
| 2268 ciKlass* k = klass(); | |
| 2269 bool xk = klass_is_exact(); | |
| 2270 if (k == NULL || !k->is_java_klass()) | |
| 2271 return TypeKlassPtr::OBJECT; | |
| 2272 else | |
| 2273 return TypeKlassPtr::make(xk? Constant: NotNull, k, 0); | |
| 2274 } | |
| 2275 | |
| 2276 | |
| 2277 //------------------------------meet------------------------------------------- | |
| 2278 // Compute the MEET of two types. It returns a new Type object. | |
| 2279 const Type *TypeOopPtr::xmeet( const Type *t ) const { | |
| 2280 // Perform a fast test for common case; meeting the same types together. | |
| 2281 if( this == t ) return this; // Meeting same type-rep? | |
| 2282 | |
| 2283 // Current "this->_base" is OopPtr | |
| 2284 switch (t->base()) { // switch on original type | |
| 2285 | |
| 2286 case Int: // Mixing ints & oops happens when javac | |
| 2287 case Long: // reuses local variables | |
| 2288 case FloatTop: | |
| 2289 case FloatCon: | |
| 2290 case FloatBot: | |
| 2291 case DoubleTop: | |
| 2292 case DoubleCon: | |
| 2293 case DoubleBot: | |
| 2294 case Bottom: // Ye Olde Default | |
| 2295 return Type::BOTTOM; | |
| 2296 case Top: | |
| 2297 return this; | |
| 2298 | |
| 2299 default: // All else is a mistake | |
| 2300 typerr(t); | |
| 2301 | |
| 2302 case RawPtr: | |
| 2303 return TypePtr::BOTTOM; // Oop meet raw is not well defined | |
| 2304 | |
| 2305 case AnyPtr: { | |
| 2306 // Found an AnyPtr type vs self-OopPtr type | |
| 2307 const TypePtr *tp = t->is_ptr(); | |
| 2308 int offset = meet_offset(tp->offset()); | |
| 2309 PTR ptr = meet_ptr(tp->ptr()); | |
| 2310 switch (tp->ptr()) { | |
| 2311 case Null: | |
| 2312 if (ptr == Null) return TypePtr::make(AnyPtr, ptr, offset); | |
| 2313 // else fall through: | |
| 2314 case TopPTR: | |
| 2315 case AnyNull: | |
| 2316 return make(ptr, offset); | |
| 2317 case BotPTR: | |
| 2318 case NotNull: | |
| 2319 return TypePtr::make(AnyPtr, ptr, offset); | |
| 2320 default: typerr(t); | |
| 2321 } | |
| 2322 } | |
| 2323 | |
| 2324 case OopPtr: { // Meeting to other OopPtrs | |
| 2325 const TypeOopPtr *tp = t->is_oopptr(); | |
| 2326 return make( meet_ptr(tp->ptr()), meet_offset(tp->offset()) ); | |
| 2327 } | |
| 2328 | |
| 2329 case InstPtr: // For these, flip the call around to cut down | |
| 2330 case KlassPtr: // on the cases I have to handle. | |
| 2331 case AryPtr: | |
| 2332 return t->xmeet(this); // Call in reverse direction | |
| 2333 | |
| 2334 } // End of switch | |
| 2335 return this; // Return the double constant | |
| 2336 } | |
| 2337 | |
| 2338 | |
| 2339 //------------------------------xdual------------------------------------------ | |
| 2340 // Dual of a pure heap pointer. No relevant klass or oop information. | |
| 2341 const Type *TypeOopPtr::xdual() const { | |
| 2342 assert(klass() == ciKlassKlass::make(), "no klasses here"); | |
| 2343 assert(const_oop() == NULL, "no constants here"); | |
| 2344 return new TypeOopPtr(_base, dual_ptr(), klass(), klass_is_exact(), const_oop(), dual_offset(), dual_instance() ); | |
| 2345 } | |
| 2346 | |
| 2347 //--------------------------make_from_klass_common----------------------------- | |
| 2348 // Computes the element-type given a klass. | |
| 2349 const TypeOopPtr* TypeOopPtr::make_from_klass_common(ciKlass *klass, bool klass_change, bool try_for_exact) { | |
| 2350 assert(klass->is_java_klass(), "must be java language klass"); | |
| 2351 if (klass->is_instance_klass()) { | |
| 2352 Compile* C = Compile::current(); | |
| 2353 Dependencies* deps = C->dependencies(); | |
| 2354 assert((deps != NULL) == (C->method() != NULL && C->method()->code_size() > 0), "sanity"); | |
| 2355 // Element is an instance | |
| 2356 bool klass_is_exact = false; | |
| 2357 if (klass->is_loaded()) { | |
| 2358 // Try to set klass_is_exact. | |
| 2359 ciInstanceKlass* ik = klass->as_instance_klass(); | |
| 2360 klass_is_exact = ik->is_final(); | |
| 2361 if (!klass_is_exact && klass_change | |
| 2362 && deps != NULL && UseUniqueSubclasses) { | |
| 2363 ciInstanceKlass* sub = ik->unique_concrete_subklass(); | |
| 2364 if (sub != NULL) { | |
| 2365 deps->assert_abstract_with_unique_concrete_subtype(ik, sub); | |
| 2366 klass = ik = sub; | |
| 2367 klass_is_exact = sub->is_final(); | |
| 2368 } | |
| 2369 } | |
| 2370 if (!klass_is_exact && try_for_exact | |
| 2371 && deps != NULL && UseExactTypes) { | |
| 2372 if (!ik->is_interface() && !ik->has_subklass()) { | |
| 2373 // Add a dependence; if concrete subclass added we need to recompile | |
| 2374 deps->assert_leaf_type(ik); | |
| 2375 klass_is_exact = true; | |
| 2376 } | |
| 2377 } | |
| 2378 } | |
| 2379 return TypeInstPtr::make(TypePtr::BotPTR, klass, klass_is_exact, NULL, 0); | |
| 2380 } else if (klass->is_obj_array_klass()) { | |
| 2381 // Element is an object array. Recursively call ourself. | |
| 2382 const TypeOopPtr *etype = TypeOopPtr::make_from_klass_common(klass->as_obj_array_klass()->element_klass(), false, try_for_exact); | |
| 2383 bool xk = etype->klass_is_exact(); | |
| 2384 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::POS); | |
| 2385 // We used to pass NotNull in here, asserting that the sub-arrays | |
| 2386 // are all not-null. This is not true in generally, as code can | |
| 2387 // slam NULLs down in the subarrays. | |
| 2388 const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::BotPTR, arr0, klass, xk, 0); | |
| 2389 return arr; | |
| 2390 } else if (klass->is_type_array_klass()) { | |
| 2391 // Element is an typeArray | |
| 2392 const Type* etype = get_const_basic_type(klass->as_type_array_klass()->element_type()); | |
| 2393 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::POS); | |
| 2394 // We used to pass NotNull in here, asserting that the array pointer | |
| 2395 // is not-null. That was not true in general. | |
| 2396 const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::BotPTR, arr0, klass, true, 0); | |
| 2397 return arr; | |
| 2398 } else { | |
| 2399 ShouldNotReachHere(); | |
| 2400 return NULL; | |
| 2401 } | |
| 2402 } | |
| 2403 | |
| 2404 //------------------------------make_from_constant----------------------------- | |
| 2405 // Make a java pointer from an oop constant | |
| 2406 const TypeOopPtr* TypeOopPtr::make_from_constant(ciObject* o) { | |
| 2407 if (o->is_method_data() || o->is_method()) { | |
| 2408 // Treat much like a typeArray of bytes, like below, but fake the type... | |
| 2409 assert(o->has_encoding(), "must be a perm space object"); | |
| 2410 const Type* etype = (Type*)get_const_basic_type(T_BYTE); | |
| 2411 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::POS); | |
| 2412 ciKlass *klass = ciTypeArrayKlass::make((BasicType) T_BYTE); | |
| 2413 assert(o->has_encoding(), "method data oops should be tenured"); | |
| 2414 const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::Constant, o, arr0, klass, true, 0); | |
| 2415 return arr; | |
| 2416 } else { | |
| 2417 assert(o->is_java_object(), "must be java language object"); | |
| 2418 assert(!o->is_null_object(), "null object not yet handled here."); | |
| 2419 ciKlass *klass = o->klass(); | |
| 2420 if (klass->is_instance_klass()) { | |
| 2421 // Element is an instance | |
| 2422 if (!o->has_encoding()) { // not a perm-space constant | |
| 2423 // %%% remove this restriction by rewriting non-perm ConPNodes in a later phase | |
| 2424 return TypeInstPtr::make(TypePtr::NotNull, klass, true, NULL, 0); | |
| 2425 } | |
| 2426 return TypeInstPtr::make(o); | |
| 2427 } else if (klass->is_obj_array_klass()) { | |
| 2428 // Element is an object array. Recursively call ourself. | |
| 2429 const Type *etype = | |
| 2430 TypeOopPtr::make_from_klass_raw(klass->as_obj_array_klass()->element_klass()); | |
| 2431 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::make(o->as_array()->length())); | |
| 2432 // We used to pass NotNull in here, asserting that the sub-arrays | |
| 2433 // are all not-null. This is not true in generally, as code can | |
| 2434 // slam NULLs down in the subarrays. | |
| 2435 if (!o->has_encoding()) { // not a perm-space constant | |
| 2436 // %%% remove this restriction by rewriting non-perm ConPNodes in a later phase | |
| 2437 return TypeAryPtr::make(TypePtr::NotNull, arr0, klass, true, 0); | |
| 2438 } | |
| 2439 const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::Constant, o, arr0, klass, true, 0); | |
| 2440 return arr; | |
| 2441 } else if (klass->is_type_array_klass()) { | |
| 2442 // Element is an typeArray | |
| 2443 const Type* etype = | |
| 2444 (Type*)get_const_basic_type(klass->as_type_array_klass()->element_type()); | |
| 2445 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::make(o->as_array()->length())); | |
| 2446 // We used to pass NotNull in here, asserting that the array pointer | |
| 2447 // is not-null. That was not true in general. | |
| 2448 if (!o->has_encoding()) { // not a perm-space constant | |
| 2449 // %%% remove this restriction by rewriting non-perm ConPNodes in a later phase | |
| 2450 return TypeAryPtr::make(TypePtr::NotNull, arr0, klass, true, 0); | |
| 2451 } | |
| 2452 const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::Constant, o, arr0, klass, true, 0); | |
| 2453 return arr; | |
| 2454 } | |
| 2455 } | |
| 2456 | |
| 2457 ShouldNotReachHere(); | |
| 2458 return NULL; | |
| 2459 } | |
| 2460 | |
| 2461 //------------------------------get_con---------------------------------------- | |
| 2462 intptr_t TypeOopPtr::get_con() const { | |
| 2463 assert( _ptr == Null || _ptr == Constant, "" ); | |
| 2464 assert( _offset >= 0, "" ); | |
| 2465 | |
| 2466 if (_offset != 0) { | |
| 2467 // After being ported to the compiler interface, the compiler no longer | |
| 2468 // directly manipulates the addresses of oops. Rather, it only has a pointer | |
| 2469 // to a handle at compile time. This handle is embedded in the generated | |
| 2470 // code and dereferenced at the time the nmethod is made. Until that time, | |
| 2471 // it is not reasonable to do arithmetic with the addresses of oops (we don't | |
| 2472 // have access to the addresses!). This does not seem to currently happen, | |
| 2473 // but this assertion here is to help prevent its occurrance. | |
| 2474 tty->print_cr("Found oop constant with non-zero offset"); | |
| 2475 ShouldNotReachHere(); | |
| 2476 } | |
| 2477 | |
| 2478 return (intptr_t)const_oop()->encoding(); | |
| 2479 } | |
| 2480 | |
| 2481 | |
| 2482 //-----------------------------filter------------------------------------------ | |
| 2483 // Do not allow interface-vs.-noninterface joins to collapse to top. | |
| 2484 const Type *TypeOopPtr::filter( const Type *kills ) const { | |
| 2485 | |
| 2486 const Type* ft = join(kills); | |
| 2487 const TypeInstPtr* ftip = ft->isa_instptr(); | |
| 2488 const TypeInstPtr* ktip = kills->isa_instptr(); | |
| 2489 | |
| 2490 if (ft->empty()) { | |
| 2491 // Check for evil case of 'this' being a class and 'kills' expecting an | |
| 2492 // interface. This can happen because the bytecodes do not contain | |
| 2493 // enough type info to distinguish a Java-level interface variable | |
| 2494 // from a Java-level object variable. If we meet 2 classes which | |
| 2495 // both implement interface I, but their meet is at 'j/l/O' which | |
| 2496 // doesn't implement I, we have no way to tell if the result should | |
| 2497 // be 'I' or 'j/l/O'. Thus we'll pick 'j/l/O'. If this then flows | |
| 2498 // into a Phi which "knows" it's an Interface type we'll have to | |
| 2499 // uplift the type. | |
| 2500 if (!empty() && ktip != NULL && ktip->is_loaded() && ktip->klass()->is_interface()) | |
| 2501 return kills; // Uplift to interface | |
| 2502 | |
| 2503 return Type::TOP; // Canonical empty value | |
| 2504 } | |
| 2505 | |
| 2506 // If we have an interface-typed Phi or cast and we narrow to a class type, | |
| 2507 // the join should report back the class. However, if we have a J/L/Object | |
| 2508 // class-typed Phi and an interface flows in, it's possible that the meet & | |
| 2509 // join report an interface back out. This isn't possible but happens | |
| 2510 // because the type system doesn't interact well with interfaces. | |
| 2511 if (ftip != NULL && ktip != NULL && | |
| 2512 ftip->is_loaded() && ftip->klass()->is_interface() && | |
| 2513 ktip->is_loaded() && !ktip->klass()->is_interface()) { | |
| 2514 // Happens in a CTW of rt.jar, 320-341, no extra flags | |
| 2515 return ktip->cast_to_ptr_type(ftip->ptr()); | |
| 2516 } | |
| 2517 | |
| 2518 return ft; | |
| 2519 } | |
| 2520 | |
| 2521 //------------------------------eq--------------------------------------------- | |
| 2522 // Structural equality check for Type representations | |
| 2523 bool TypeOopPtr::eq( const Type *t ) const { | |
| 2524 const TypeOopPtr *a = (const TypeOopPtr*)t; | |
| 2525 if (_klass_is_exact != a->_klass_is_exact || | |
| 2526 _instance_id != a->_instance_id) return false; | |
| 2527 ciObject* one = const_oop(); | |
| 2528 ciObject* two = a->const_oop(); | |
| 2529 if (one == NULL || two == NULL) { | |
| 2530 return (one == two) && TypePtr::eq(t); | |
| 2531 } else { | |
| 2532 return one->equals(two) && TypePtr::eq(t); | |
| 2533 } | |
| 2534 } | |
| 2535 | |
| 2536 //------------------------------hash------------------------------------------- | |
| 2537 // Type-specific hashing function. | |
| 2538 int TypeOopPtr::hash(void) const { | |
| 2539 return | |
| 2540 (const_oop() ? const_oop()->hash() : 0) + | |
| 2541 _klass_is_exact + | |
| 2542 _instance_id + | |
| 2543 TypePtr::hash(); | |
| 2544 } | |
| 2545 | |
| 2546 //------------------------------dump2------------------------------------------ | |
| 2547 #ifndef PRODUCT | |
| 2548 void TypeOopPtr::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 2549 st->print("oopptr:%s", ptr_msg[_ptr]); | |
| 2550 if( _klass_is_exact ) st->print(":exact"); | |
| 2551 if( const_oop() ) st->print(INTPTR_FORMAT, const_oop()); | |
| 2552 switch( _offset ) { | |
| 2553 case OffsetTop: st->print("+top"); break; | |
| 2554 case OffsetBot: st->print("+any"); break; | |
| 2555 case 0: break; | |
| 2556 default: st->print("+%d",_offset); break; | |
| 2557 } | |
| 2558 if (_instance_id != UNKNOWN_INSTANCE) | |
| 2559 st->print(",iid=%d",_instance_id); | |
| 2560 } | |
| 2561 #endif | |
| 2562 | |
| 2563 //------------------------------singleton-------------------------------------- | |
| 2564 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
| 2565 // constants | |
| 2566 bool TypeOopPtr::singleton(void) const { | |
| 2567 // detune optimizer to not generate constant oop + constant offset as a constant! | |
| 2568 // TopPTR, Null, AnyNull, Constant are all singletons | |
| 2569 return (_offset == 0) && !below_centerline(_ptr); | |
| 2570 } | |
| 2571 | |
| 2572 //------------------------------xadd_offset------------------------------------ | |
| 2573 int TypeOopPtr::xadd_offset( int offset ) const { | |
| 2574 // Adding to 'TOP' offset? Return 'TOP'! | |
| 2575 if( _offset == OffsetTop || offset == OffsetTop ) return OffsetTop; | |
| 2576 // Adding to 'BOTTOM' offset? Return 'BOTTOM'! | |
| 2577 if( _offset == OffsetBot || offset == OffsetBot ) return OffsetBot; | |
| 2578 | |
| 2579 // assert( _offset >= 0 && _offset+offset >= 0, "" ); | |
| 2580 // It is possible to construct a negative offset during PhaseCCP | |
| 2581 | |
| 2582 return _offset+offset; // Sum valid offsets | |
| 2583 } | |
| 2584 | |
| 2585 //------------------------------add_offset------------------------------------- | |
| 2586 const TypePtr *TypeOopPtr::add_offset( int offset ) const { | |
| 2587 return make( _ptr, xadd_offset(offset) ); | |
| 2588 } | |
| 2589 | |
| 2590 int TypeOopPtr::meet_instance(int iid) const { | |
| 2591 if (iid == 0) { | |
| 2592 return (_instance_id < 0) ? _instance_id : UNKNOWN_INSTANCE; | |
| 2593 } else if (_instance_id == UNKNOWN_INSTANCE) { | |
| 2594 return (iid < 0) ? iid : UNKNOWN_INSTANCE; | |
| 2595 } else { | |
| 2596 return (_instance_id == iid) ? iid : UNKNOWN_INSTANCE; | |
| 2597 } | |
| 2598 } | |
| 2599 | |
| 2600 //============================================================================= | |
| 2601 // Convenience common pre-built types. | |
| 2602 const TypeInstPtr *TypeInstPtr::NOTNULL; | |
| 2603 const TypeInstPtr *TypeInstPtr::BOTTOM; | |
| 2604 const TypeInstPtr *TypeInstPtr::MIRROR; | |
| 2605 const TypeInstPtr *TypeInstPtr::MARK; | |
| 2606 const TypeInstPtr *TypeInstPtr::KLASS; | |
| 2607 | |
| 2608 //------------------------------TypeInstPtr------------------------------------- | |
| 2609 TypeInstPtr::TypeInstPtr(PTR ptr, ciKlass* k, bool xk, ciObject* o, int off, int instance_id) | |
| 2610 : TypeOopPtr(InstPtr, ptr, k, xk, o, off, instance_id), _name(k->name()) { | |
| 2611 assert(k != NULL && | |
| 2612 (k->is_loaded() || o == NULL), | |
| 2613 "cannot have constants with non-loaded klass"); | |
| 2614 }; | |
| 2615 | |
| 2616 //------------------------------make------------------------------------------- | |
| 2617 const TypeInstPtr *TypeInstPtr::make(PTR ptr, | |
| 2618 ciKlass* k, | |
| 2619 bool xk, | |
| 2620 ciObject* o, | |
| 2621 int offset, | |
| 2622 int instance_id) { | |
| 2623 assert( !k->is_loaded() || k->is_instance_klass() || | |
| 2624 k->is_method_klass(), "Must be for instance or method"); | |
| 2625 // Either const_oop() is NULL or else ptr is Constant | |
| 2626 assert( (!o && ptr != Constant) || (o && ptr == Constant), | |
| 2627 "constant pointers must have a value supplied" ); | |
| 2628 // Ptr is never Null | |
| 2629 assert( ptr != Null, "NULL pointers are not typed" ); | |
| 2630 | |
| 2631 if (instance_id != UNKNOWN_INSTANCE) | |
| 2632 xk = true; // instances are always exactly typed | |
| 2633 if (!UseExactTypes) xk = false; | |
| 2634 if (ptr == Constant) { | |
| 2635 // Note: This case includes meta-object constants, such as methods. | |
| 2636 xk = true; | |
| 2637 } else if (k->is_loaded()) { | |
| 2638 ciInstanceKlass* ik = k->as_instance_klass(); | |
| 2639 if (!xk && ik->is_final()) xk = true; // no inexact final klass | |
| 2640 if (xk && ik->is_interface()) xk = false; // no exact interface | |
| 2641 } | |
| 2642 | |
| 2643 // Now hash this baby | |
| 2644 TypeInstPtr *result = | |
| 2645 (TypeInstPtr*)(new TypeInstPtr(ptr, k, xk, o ,offset, instance_id))->hashcons(); | |
| 2646 | |
| 2647 return result; | |
| 2648 } | |
| 2649 | |
| 2650 | |
| 2651 //------------------------------cast_to_ptr_type------------------------------- | |
| 2652 const Type *TypeInstPtr::cast_to_ptr_type(PTR ptr) const { | |
| 2653 if( ptr == _ptr ) return this; | |
| 2654 // Reconstruct _sig info here since not a problem with later lazy | |
| 2655 // construction, _sig will show up on demand. | |
| 2656 return make(ptr, klass(), klass_is_exact(), const_oop(), _offset); | |
| 2657 } | |
| 2658 | |
| 2659 | |
| 2660 //-----------------------------cast_to_exactness------------------------------- | |
| 2661 const Type *TypeInstPtr::cast_to_exactness(bool klass_is_exact) const { | |
| 2662 if( klass_is_exact == _klass_is_exact ) return this; | |
| 2663 if (!UseExactTypes) return this; | |
| 2664 if (!_klass->is_loaded()) return this; | |
| 2665 ciInstanceKlass* ik = _klass->as_instance_klass(); | |
| 2666 if( (ik->is_final() || _const_oop) ) return this; // cannot clear xk | |
| 2667 if( ik->is_interface() ) return this; // cannot set xk | |
| 2668 return make(ptr(), klass(), klass_is_exact, const_oop(), _offset, _instance_id); | |
| 2669 } | |
| 2670 | |
| 2671 //-----------------------------cast_to_instance------------------------------- | |
| 2672 const TypeOopPtr *TypeInstPtr::cast_to_instance(int instance_id) const { | |
| 2673 if( instance_id == _instance_id) return this; | |
| 163 | 2674 bool exact = true; |
| 2675 PTR ptr_t = NotNull; | |
| 2676 if (instance_id == UNKNOWN_INSTANCE) { | |
| 2677 exact = _klass_is_exact; | |
| 2678 ptr_t = _ptr; | |
| 2679 } | |
| 2680 return make(ptr_t, klass(), exact, const_oop(), _offset, instance_id); | |
| 0 | 2681 } |
| 2682 | |
| 2683 //------------------------------xmeet_unloaded--------------------------------- | |
| 2684 // Compute the MEET of two InstPtrs when at least one is unloaded. | |
| 2685 // Assume classes are different since called after check for same name/class-loader | |
| 2686 const TypeInstPtr *TypeInstPtr::xmeet_unloaded(const TypeInstPtr *tinst) const { | |
| 2687 int off = meet_offset(tinst->offset()); | |
| 2688 PTR ptr = meet_ptr(tinst->ptr()); | |
| 2689 | |
| 2690 const TypeInstPtr *loaded = is_loaded() ? this : tinst; | |
| 2691 const TypeInstPtr *unloaded = is_loaded() ? tinst : this; | |
| 2692 if( loaded->klass()->equals(ciEnv::current()->Object_klass()) ) { | |
| 2693 // | |
| 2694 // Meet unloaded class with java/lang/Object | |
| 2695 // | |
| 2696 // Meet | |
| 2697 // | Unloaded Class | |
| 2698 // Object | TOP | AnyNull | Constant | NotNull | BOTTOM | | |
| 2699 // =================================================================== | |
| 2700 // TOP | ..........................Unloaded......................| | |
| 2701 // AnyNull | U-AN |................Unloaded......................| | |
| 2702 // Constant | ... O-NN .................................. | O-BOT | | |
| 2703 // NotNull | ... O-NN .................................. | O-BOT | | |
| 2704 // BOTTOM | ........................Object-BOTTOM ..................| | |
| 2705 // | |
| 2706 assert(loaded->ptr() != TypePtr::Null, "insanity check"); | |
| 2707 // | |
| 2708 if( loaded->ptr() == TypePtr::TopPTR ) { return unloaded; } | |
| 2709 else if (loaded->ptr() == TypePtr::AnyNull) { return TypeInstPtr::make( ptr, unloaded->klass() ); } | |
| 2710 else if (loaded->ptr() == TypePtr::BotPTR ) { return TypeInstPtr::BOTTOM; } | |
| 2711 else if (loaded->ptr() == TypePtr::Constant || loaded->ptr() == TypePtr::NotNull) { | |
| 2712 if (unloaded->ptr() == TypePtr::BotPTR ) { return TypeInstPtr::BOTTOM; } | |
| 2713 else { return TypeInstPtr::NOTNULL; } | |
| 2714 } | |
| 2715 else if( unloaded->ptr() == TypePtr::TopPTR ) { return unloaded; } | |
| 2716 | |
| 2717 return unloaded->cast_to_ptr_type(TypePtr::AnyNull)->is_instptr(); | |
| 2718 } | |
| 2719 | |
| 2720 // Both are unloaded, not the same class, not Object | |
| 2721 // Or meet unloaded with a different loaded class, not java/lang/Object | |
| 2722 if( ptr != TypePtr::BotPTR ) { | |
| 2723 return TypeInstPtr::NOTNULL; | |
| 2724 } | |
| 2725 return TypeInstPtr::BOTTOM; | |
| 2726 } | |
| 2727 | |
| 2728 | |
| 2729 //------------------------------meet------------------------------------------- | |
| 2730 // Compute the MEET of two types. It returns a new Type object. | |
| 2731 const Type *TypeInstPtr::xmeet( const Type *t ) const { | |
| 2732 // Perform a fast test for common case; meeting the same types together. | |
| 2733 if( this == t ) return this; // Meeting same type-rep? | |
| 2734 | |
| 2735 // Current "this->_base" is Pointer | |
| 2736 switch (t->base()) { // switch on original type | |
| 2737 | |
| 2738 case Int: // Mixing ints & oops happens when javac | |
| 2739 case Long: // reuses local variables | |
| 2740 case FloatTop: | |
| 2741 case FloatCon: | |
| 2742 case FloatBot: | |
| 2743 case DoubleTop: | |
| 2744 case DoubleCon: | |
| 2745 case DoubleBot: | |
|
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|
2746 case NarrowOop: |
| 0 | 2747 case Bottom: // Ye Olde Default |
| 2748 return Type::BOTTOM; | |
| 2749 case Top: | |
| 2750 return this; | |
| 2751 | |
| 2752 default: // All else is a mistake | |
| 2753 typerr(t); | |
| 2754 | |
| 2755 case RawPtr: return TypePtr::BOTTOM; | |
| 2756 | |
| 2757 case AryPtr: { // All arrays inherit from Object class | |
| 2758 const TypeAryPtr *tp = t->is_aryptr(); | |
| 2759 int offset = meet_offset(tp->offset()); | |
| 2760 PTR ptr = meet_ptr(tp->ptr()); | |
| 2761 int iid = meet_instance(tp->instance_id()); | |
| 2762 switch (ptr) { | |
| 2763 case TopPTR: | |
| 2764 case AnyNull: // Fall 'down' to dual of object klass | |
| 2765 if (klass()->equals(ciEnv::current()->Object_klass())) { | |
| 2766 return TypeAryPtr::make(ptr, tp->ary(), tp->klass(), tp->klass_is_exact(), offset, iid); | |
| 2767 } else { | |
| 2768 // cannot subclass, so the meet has to fall badly below the centerline | |
| 2769 ptr = NotNull; | |
| 2770 return TypeInstPtr::make( ptr, ciEnv::current()->Object_klass(), false, NULL, offset, iid); | |
| 2771 } | |
| 2772 case Constant: | |
| 2773 case NotNull: | |
| 2774 case BotPTR: // Fall down to object klass | |
| 2775 // LCA is object_klass, but if we subclass from the top we can do better | |
| 2776 if( above_centerline(_ptr) ) { // if( _ptr == TopPTR || _ptr == AnyNull ) | |
| 2777 // If 'this' (InstPtr) is above the centerline and it is Object class | |
| 2778 // then we can subclass in the Java class heirarchy. | |
| 2779 if (klass()->equals(ciEnv::current()->Object_klass())) { | |
| 2780 // that is, tp's array type is a subtype of my klass | |
| 2781 return TypeAryPtr::make(ptr, tp->ary(), tp->klass(), tp->klass_is_exact(), offset, iid); | |
| 2782 } | |
| 2783 } | |
| 2784 // The other case cannot happen, since I cannot be a subtype of an array. | |
| 2785 // The meet falls down to Object class below centerline. | |
| 2786 if( ptr == Constant ) | |
| 2787 ptr = NotNull; | |
| 2788 return make( ptr, ciEnv::current()->Object_klass(), false, NULL, offset, iid ); | |
| 2789 default: typerr(t); | |
| 2790 } | |
| 2791 } | |
| 2792 | |
| 2793 case OopPtr: { // Meeting to OopPtrs | |
| 2794 // Found a OopPtr type vs self-InstPtr type | |
| 2795 const TypePtr *tp = t->is_oopptr(); | |
| 2796 int offset = meet_offset(tp->offset()); | |
| 2797 PTR ptr = meet_ptr(tp->ptr()); | |
| 2798 switch (tp->ptr()) { | |
| 2799 case TopPTR: | |
| 2800 case AnyNull: | |
| 2801 return make(ptr, klass(), klass_is_exact(), | |
| 2802 (ptr == Constant ? const_oop() : NULL), offset); | |
| 2803 case NotNull: | |
| 2804 case BotPTR: | |
| 2805 return TypeOopPtr::make(ptr, offset); | |
| 2806 default: typerr(t); | |
| 2807 } | |
| 2808 } | |
| 2809 | |
| 2810 case AnyPtr: { // Meeting to AnyPtrs | |
| 2811 // Found an AnyPtr type vs self-InstPtr type | |
| 2812 const TypePtr *tp = t->is_ptr(); | |
| 2813 int offset = meet_offset(tp->offset()); | |
| 2814 PTR ptr = meet_ptr(tp->ptr()); | |
| 2815 switch (tp->ptr()) { | |
| 2816 case Null: | |
| 2817 if( ptr == Null ) return TypePtr::make( AnyPtr, ptr, offset ); | |
| 2818 case TopPTR: | |
| 2819 case AnyNull: | |
| 2820 return make( ptr, klass(), klass_is_exact(), | |
| 2821 (ptr == Constant ? const_oop() : NULL), offset ); | |
| 2822 case NotNull: | |
| 2823 case BotPTR: | |
| 2824 return TypePtr::make( AnyPtr, ptr, offset ); | |
| 2825 default: typerr(t); | |
| 2826 } | |
| 2827 } | |
| 2828 | |
| 2829 /* | |
| 2830 A-top } | |
| 2831 / | \ } Tops | |
| 2832 B-top A-any C-top } | |
| 2833 | / | \ | } Any-nulls | |
| 2834 B-any | C-any } | |
| 2835 | | | | |
| 2836 B-con A-con C-con } constants; not comparable across classes | |
| 2837 | | | | |
| 2838 B-not | C-not } | |
| 2839 | \ | / | } not-nulls | |
| 2840 B-bot A-not C-bot } | |
| 2841 \ | / } Bottoms | |
| 2842 A-bot } | |
| 2843 */ | |
| 2844 | |
| 2845 case InstPtr: { // Meeting 2 Oops? | |
| 2846 // Found an InstPtr sub-type vs self-InstPtr type | |
| 2847 const TypeInstPtr *tinst = t->is_instptr(); | |
| 2848 int off = meet_offset( tinst->offset() ); | |
| 2849 PTR ptr = meet_ptr( tinst->ptr() ); | |
| 2850 int instance_id = meet_instance(tinst->instance_id()); | |
| 2851 | |
| 2852 // Check for easy case; klasses are equal (and perhaps not loaded!) | |
| 2853 // If we have constants, then we created oops so classes are loaded | |
| 2854 // and we can handle the constants further down. This case handles | |
| 2855 // both-not-loaded or both-loaded classes | |
| 2856 if (ptr != Constant && klass()->equals(tinst->klass()) && klass_is_exact() == tinst->klass_is_exact()) { | |
| 2857 return make( ptr, klass(), klass_is_exact(), NULL, off, instance_id ); | |
| 2858 } | |
| 2859 | |
| 2860 // Classes require inspection in the Java klass hierarchy. Must be loaded. | |
| 2861 ciKlass* tinst_klass = tinst->klass(); | |
| 2862 ciKlass* this_klass = this->klass(); | |
| 2863 bool tinst_xk = tinst->klass_is_exact(); | |
| 2864 bool this_xk = this->klass_is_exact(); | |
| 2865 if (!tinst_klass->is_loaded() || !this_klass->is_loaded() ) { | |
| 2866 // One of these classes has not been loaded | |
| 2867 const TypeInstPtr *unloaded_meet = xmeet_unloaded(tinst); | |
| 2868 #ifndef PRODUCT | |
| 2869 if( PrintOpto && Verbose ) { | |
| 2870 tty->print("meet of unloaded classes resulted in: "); unloaded_meet->dump(); tty->cr(); | |
| 2871 tty->print(" this == "); this->dump(); tty->cr(); | |
| 2872 tty->print(" tinst == "); tinst->dump(); tty->cr(); | |
| 2873 } | |
| 2874 #endif | |
| 2875 return unloaded_meet; | |
| 2876 } | |
| 2877 | |
| 2878 // Handle mixing oops and interfaces first. | |
| 2879 if( this_klass->is_interface() && !tinst_klass->is_interface() ) { | |
| 2880 ciKlass *tmp = tinst_klass; // Swap interface around | |
| 2881 tinst_klass = this_klass; | |
| 2882 this_klass = tmp; | |
| 2883 bool tmp2 = tinst_xk; | |
| 2884 tinst_xk = this_xk; | |
| 2885 this_xk = tmp2; | |
| 2886 } | |
| 2887 if (tinst_klass->is_interface() && | |
| 2888 !(this_klass->is_interface() || | |
| 2889 // Treat java/lang/Object as an honorary interface, | |
| 2890 // because we need a bottom for the interface hierarchy. | |
| 2891 this_klass == ciEnv::current()->Object_klass())) { | |
| 2892 // Oop meets interface! | |
| 2893 | |
| 2894 // See if the oop subtypes (implements) interface. | |
| 2895 ciKlass *k; | |
| 2896 bool xk; | |
| 2897 if( this_klass->is_subtype_of( tinst_klass ) ) { | |
| 2898 // Oop indeed subtypes. Now keep oop or interface depending | |
| 2899 // on whether we are both above the centerline or either is | |
| 2900 // below the centerline. If we are on the centerline | |
| 2901 // (e.g., Constant vs. AnyNull interface), use the constant. | |
| 2902 k = below_centerline(ptr) ? tinst_klass : this_klass; | |
| 2903 // If we are keeping this_klass, keep its exactness too. | |
| 2904 xk = below_centerline(ptr) ? tinst_xk : this_xk; | |
| 2905 } else { // Does not implement, fall to Object | |
| 2906 // Oop does not implement interface, so mixing falls to Object | |
| 2907 // just like the verifier does (if both are above the | |
| 2908 // centerline fall to interface) | |
| 2909 k = above_centerline(ptr) ? tinst_klass : ciEnv::current()->Object_klass(); | |
| 2910 xk = above_centerline(ptr) ? tinst_xk : false; | |
| 2911 // Watch out for Constant vs. AnyNull interface. | |
| 2912 if (ptr == Constant) ptr = NotNull; // forget it was a constant | |
| 2913 } | |
| 2914 ciObject* o = NULL; // the Constant value, if any | |
| 2915 if (ptr == Constant) { | |
| 2916 // Find out which constant. | |
| 2917 o = (this_klass == klass()) ? const_oop() : tinst->const_oop(); | |
| 2918 } | |
| 2919 return make( ptr, k, xk, o, off ); | |
| 2920 } | |
| 2921 | |
| 2922 // Either oop vs oop or interface vs interface or interface vs Object | |
| 2923 | |
| 2924 // !!! Here's how the symmetry requirement breaks down into invariants: | |
| 2925 // If we split one up & one down AND they subtype, take the down man. | |
| 2926 // If we split one up & one down AND they do NOT subtype, "fall hard". | |
| 2927 // If both are up and they subtype, take the subtype class. | |
| 2928 // If both are up and they do NOT subtype, "fall hard". | |
| 2929 // If both are down and they subtype, take the supertype class. | |
| 2930 // If both are down and they do NOT subtype, "fall hard". | |
| 2931 // Constants treated as down. | |
| 2932 | |
| 2933 // Now, reorder the above list; observe that both-down+subtype is also | |
| 2934 // "fall hard"; "fall hard" becomes the default case: | |
| 2935 // If we split one up & one down AND they subtype, take the down man. | |
| 2936 // If both are up and they subtype, take the subtype class. | |
| 2937 | |
| 2938 // If both are down and they subtype, "fall hard". | |
| 2939 // If both are down and they do NOT subtype, "fall hard". | |
| 2940 // If both are up and they do NOT subtype, "fall hard". | |
| 2941 // If we split one up & one down AND they do NOT subtype, "fall hard". | |
| 2942 | |
| 2943 // If a proper subtype is exact, and we return it, we return it exactly. | |
| 2944 // If a proper supertype is exact, there can be no subtyping relationship! | |
| 2945 // If both types are equal to the subtype, exactness is and-ed below the | |
| 2946 // centerline and or-ed above it. (N.B. Constants are always exact.) | |
| 2947 | |
| 2948 // Check for subtyping: | |
| 2949 ciKlass *subtype = NULL; | |
| 2950 bool subtype_exact = false; | |
| 2951 if( tinst_klass->equals(this_klass) ) { | |
| 2952 subtype = this_klass; | |
| 2953 subtype_exact = below_centerline(ptr) ? (this_xk & tinst_xk) : (this_xk | tinst_xk); | |
| 2954 } else if( !tinst_xk && this_klass->is_subtype_of( tinst_klass ) ) { | |
| 2955 subtype = this_klass; // Pick subtyping class | |
| 2956 subtype_exact = this_xk; | |
| 2957 } else if( !this_xk && tinst_klass->is_subtype_of( this_klass ) ) { | |
| 2958 subtype = tinst_klass; // Pick subtyping class | |
| 2959 subtype_exact = tinst_xk; | |
| 2960 } | |
| 2961 | |
| 2962 if( subtype ) { | |
| 2963 if( above_centerline(ptr) ) { // both are up? | |
| 2964 this_klass = tinst_klass = subtype; | |
| 2965 this_xk = tinst_xk = subtype_exact; | |
| 2966 } else if( above_centerline(this ->_ptr) && !above_centerline(tinst->_ptr) ) { | |
| 2967 this_klass = tinst_klass; // tinst is down; keep down man | |
| 2968 this_xk = tinst_xk; | |
| 2969 } else if( above_centerline(tinst->_ptr) && !above_centerline(this ->_ptr) ) { | |
| 2970 tinst_klass = this_klass; // this is down; keep down man | |
| 2971 tinst_xk = this_xk; | |
| 2972 } else { | |
| 2973 this_xk = subtype_exact; // either they are equal, or we'll do an LCA | |
| 2974 } | |
| 2975 } | |
| 2976 | |
| 2977 // Check for classes now being equal | |
| 2978 if (tinst_klass->equals(this_klass)) { | |
| 2979 // If the klasses are equal, the constants may still differ. Fall to | |
| 2980 // NotNull if they do (neither constant is NULL; that is a special case | |
| 2981 // handled elsewhere). | |
| 2982 ciObject* o = NULL; // Assume not constant when done | |
| 2983 ciObject* this_oop = const_oop(); | |
| 2984 ciObject* tinst_oop = tinst->const_oop(); | |
| 2985 if( ptr == Constant ) { | |
| 2986 if (this_oop != NULL && tinst_oop != NULL && | |
| 2987 this_oop->equals(tinst_oop) ) | |
| 2988 o = this_oop; | |
| 2989 else if (above_centerline(this ->_ptr)) | |
| 2990 o = tinst_oop; | |
| 2991 else if (above_centerline(tinst ->_ptr)) | |
| 2992 o = this_oop; | |
| 2993 else | |
| 2994 ptr = NotNull; | |
| 2995 } | |
| 2996 return make( ptr, this_klass, this_xk, o, off, instance_id ); | |
| 2997 } // Else classes are not equal | |
| 2998 | |
| 2999 // Since klasses are different, we require a LCA in the Java | |
| 3000 // class hierarchy - which means we have to fall to at least NotNull. | |
| 3001 if( ptr == TopPTR || ptr == AnyNull || ptr == Constant ) | |
| 3002 ptr = NotNull; | |
| 3003 | |
| 3004 // Now we find the LCA of Java classes | |
| 3005 ciKlass* k = this_klass->least_common_ancestor(tinst_klass); | |
| 3006 return make( ptr, k, false, NULL, off ); | |
| 3007 } // End of case InstPtr | |
| 3008 | |
| 3009 case KlassPtr: | |
| 3010 return TypeInstPtr::BOTTOM; | |
| 3011 | |
| 3012 } // End of switch | |
| 3013 return this; // Return the double constant | |
| 3014 } | |
| 3015 | |
| 3016 | |
| 3017 //------------------------java_mirror_type-------------------------------------- | |
| 3018 ciType* TypeInstPtr::java_mirror_type() const { | |
| 3019 // must be a singleton type | |
| 3020 if( const_oop() == NULL ) return NULL; | |
| 3021 | |
| 3022 // must be of type java.lang.Class | |
| 3023 if( klass() != ciEnv::current()->Class_klass() ) return NULL; | |
| 3024 | |
| 3025 return const_oop()->as_instance()->java_mirror_type(); | |
| 3026 } | |
| 3027 | |
| 3028 | |
| 3029 //------------------------------xdual------------------------------------------ | |
| 3030 // Dual: do NOT dual on klasses. This means I do NOT understand the Java | |
| 3031 // inheritence mechanism. | |
| 3032 const Type *TypeInstPtr::xdual() const { | |
| 3033 return new TypeInstPtr( dual_ptr(), klass(), klass_is_exact(), const_oop(), dual_offset(), dual_instance() ); | |
| 3034 } | |
| 3035 | |
| 3036 //------------------------------eq--------------------------------------------- | |
| 3037 // Structural equality check for Type representations | |
| 3038 bool TypeInstPtr::eq( const Type *t ) const { | |
| 3039 const TypeInstPtr *p = t->is_instptr(); | |
| 3040 return | |
| 3041 klass()->equals(p->klass()) && | |
| 3042 TypeOopPtr::eq(p); // Check sub-type stuff | |
| 3043 } | |
| 3044 | |
| 3045 //------------------------------hash------------------------------------------- | |
| 3046 // Type-specific hashing function. | |
| 3047 int TypeInstPtr::hash(void) const { | |
| 3048 int hash = klass()->hash() + TypeOopPtr::hash(); | |
| 3049 return hash; | |
| 3050 } | |
| 3051 | |
| 3052 //------------------------------dump2------------------------------------------ | |
| 3053 // Dump oop Type | |
| 3054 #ifndef PRODUCT | |
| 3055 void TypeInstPtr::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 3056 // Print the name of the klass. | |
| 3057 klass()->print_name_on(st); | |
| 3058 | |
| 3059 switch( _ptr ) { | |
| 3060 case Constant: | |
| 3061 // TO DO: Make CI print the hex address of the underlying oop. | |
| 3062 if (WizardMode || Verbose) { | |
| 3063 const_oop()->print_oop(st); | |
| 3064 } | |
| 3065 case BotPTR: | |
| 3066 if (!WizardMode && !Verbose) { | |
| 3067 if( _klass_is_exact ) st->print(":exact"); | |
| 3068 break; | |
| 3069 } | |
| 3070 case TopPTR: | |
| 3071 case AnyNull: | |
| 3072 case NotNull: | |
| 3073 st->print(":%s", ptr_msg[_ptr]); | |
| 3074 if( _klass_is_exact ) st->print(":exact"); | |
| 3075 break; | |
| 3076 } | |
| 3077 | |
| 3078 if( _offset ) { // Dump offset, if any | |
| 3079 if( _offset == OffsetBot ) st->print("+any"); | |
| 3080 else if( _offset == OffsetTop ) st->print("+unknown"); | |
| 3081 else st->print("+%d", _offset); | |
| 3082 } | |
| 3083 | |
| 3084 st->print(" *"); | |
| 3085 if (_instance_id != UNKNOWN_INSTANCE) | |
| 3086 st->print(",iid=%d",_instance_id); | |
| 3087 } | |
| 3088 #endif | |
| 3089 | |
| 3090 //------------------------------add_offset------------------------------------- | |
| 3091 const TypePtr *TypeInstPtr::add_offset( int offset ) const { | |
| 3092 return make( _ptr, klass(), klass_is_exact(), const_oop(), xadd_offset(offset), _instance_id ); | |
| 3093 } | |
| 3094 | |
| 3095 //============================================================================= | |
| 3096 // Convenience common pre-built types. | |
| 3097 const TypeAryPtr *TypeAryPtr::RANGE; | |
| 3098 const TypeAryPtr *TypeAryPtr::OOPS; | |
| 163 | 3099 const TypeAryPtr *TypeAryPtr::NARROWOOPS; |
| 0 | 3100 const TypeAryPtr *TypeAryPtr::BYTES; |
| 3101 const TypeAryPtr *TypeAryPtr::SHORTS; | |
| 3102 const TypeAryPtr *TypeAryPtr::CHARS; | |
| 3103 const TypeAryPtr *TypeAryPtr::INTS; | |
| 3104 const TypeAryPtr *TypeAryPtr::LONGS; | |
| 3105 const TypeAryPtr *TypeAryPtr::FLOATS; | |
| 3106 const TypeAryPtr *TypeAryPtr::DOUBLES; | |
| 3107 | |
| 3108 //------------------------------make------------------------------------------- | |
| 3109 const TypeAryPtr *TypeAryPtr::make( PTR ptr, const TypeAry *ary, ciKlass* k, bool xk, int offset, int instance_id ) { | |
| 3110 assert(!(k == NULL && ary->_elem->isa_int()), | |
| 3111 "integral arrays must be pre-equipped with a class"); | |
| 3112 if (!xk) xk = ary->ary_must_be_exact(); | |
| 3113 if (instance_id != UNKNOWN_INSTANCE) | |
| 3114 xk = true; // instances are always exactly typed | |
| 3115 if (!UseExactTypes) xk = (ptr == Constant); | |
| 3116 return (TypeAryPtr*)(new TypeAryPtr(ptr, NULL, ary, k, xk, offset, instance_id))->hashcons(); | |
| 3117 } | |
| 3118 | |
| 3119 //------------------------------make------------------------------------------- | |
| 3120 const TypeAryPtr *TypeAryPtr::make( PTR ptr, ciObject* o, const TypeAry *ary, ciKlass* k, bool xk, int offset, int instance_id ) { | |
| 3121 assert(!(k == NULL && ary->_elem->isa_int()), | |
| 3122 "integral arrays must be pre-equipped with a class"); | |
| 3123 assert( (ptr==Constant && o) || (ptr!=Constant && !o), "" ); | |
| 3124 if (!xk) xk = (o != NULL) || ary->ary_must_be_exact(); | |
| 3125 if (instance_id != UNKNOWN_INSTANCE) | |
| 3126 xk = true; // instances are always exactly typed | |
| 3127 if (!UseExactTypes) xk = (ptr == Constant); | |
| 3128 return (TypeAryPtr*)(new TypeAryPtr(ptr, o, ary, k, xk, offset, instance_id))->hashcons(); | |
| 3129 } | |
| 3130 | |
| 3131 //------------------------------cast_to_ptr_type------------------------------- | |
| 3132 const Type *TypeAryPtr::cast_to_ptr_type(PTR ptr) const { | |
| 3133 if( ptr == _ptr ) return this; | |
| 3134 return make(ptr, const_oop(), _ary, klass(), klass_is_exact(), _offset); | |
| 3135 } | |
| 3136 | |
| 3137 | |
| 3138 //-----------------------------cast_to_exactness------------------------------- | |
| 3139 const Type *TypeAryPtr::cast_to_exactness(bool klass_is_exact) const { | |
| 3140 if( klass_is_exact == _klass_is_exact ) return this; | |
| 3141 if (!UseExactTypes) return this; | |
| 3142 if (_ary->ary_must_be_exact()) return this; // cannot clear xk | |
| 3143 return make(ptr(), const_oop(), _ary, klass(), klass_is_exact, _offset, _instance_id); | |
| 3144 } | |
| 3145 | |
| 3146 //-----------------------------cast_to_instance------------------------------- | |
| 3147 const TypeOopPtr *TypeAryPtr::cast_to_instance(int instance_id) const { | |
| 3148 if( instance_id == _instance_id) return this; | |
| 163 | 3149 bool exact = true; |
| 3150 PTR ptr_t = NotNull; | |
| 3151 if (instance_id == UNKNOWN_INSTANCE) { | |
| 3152 exact = _klass_is_exact; | |
| 3153 ptr_t = _ptr; | |
| 3154 } | |
| 3155 return make(ptr_t, const_oop(), _ary, klass(), exact, _offset, instance_id); | |
| 0 | 3156 } |
| 3157 | |
| 3158 //-----------------------------narrow_size_type------------------------------- | |
| 3159 // Local cache for arrayOopDesc::max_array_length(etype), | |
| 3160 // which is kind of slow (and cached elsewhere by other users). | |
| 3161 static jint max_array_length_cache[T_CONFLICT+1]; | |
| 3162 static jint max_array_length(BasicType etype) { | |
| 3163 jint& cache = max_array_length_cache[etype]; | |
| 3164 jint res = cache; | |
| 3165 if (res == 0) { | |
| 3166 switch (etype) { | |
|
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
64
diff
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|
3167 case T_NARROWOOP: |
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3168 etype = T_OBJECT; |
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3169 break; |
| 0 | 3170 case T_CONFLICT: |
| 3171 case T_ILLEGAL: | |
| 3172 case T_VOID: | |
| 3173 etype = T_BYTE; // will produce conservatively high value | |
| 3174 } | |
| 3175 cache = res = arrayOopDesc::max_array_length(etype); | |
| 3176 } | |
| 3177 return res; | |
| 3178 } | |
| 3179 | |
| 3180 // Narrow the given size type to the index range for the given array base type. | |
| 3181 // Return NULL if the resulting int type becomes empty. | |
| 3182 const TypeInt* TypeAryPtr::narrow_size_type(const TypeInt* size, BasicType elem) { | |
| 3183 jint hi = size->_hi; | |
| 3184 jint lo = size->_lo; | |
| 3185 jint min_lo = 0; | |
| 3186 jint max_hi = max_array_length(elem); | |
| 3187 //if (index_not_size) --max_hi; // type of a valid array index, FTR | |
| 3188 bool chg = false; | |
| 3189 if (lo < min_lo) { lo = min_lo; chg = true; } | |
| 3190 if (hi > max_hi) { hi = max_hi; chg = true; } | |
| 3191 if (lo > hi) | |
| 3192 return NULL; | |
| 3193 if (!chg) | |
| 3194 return size; | |
| 3195 return TypeInt::make(lo, hi, Type::WidenMin); | |
| 3196 } | |
| 3197 | |
| 3198 //-------------------------------cast_to_size---------------------------------- | |
| 3199 const TypeAryPtr* TypeAryPtr::cast_to_size(const TypeInt* new_size) const { | |
| 3200 assert(new_size != NULL, ""); | |
| 3201 new_size = narrow_size_type(new_size, elem()->basic_type()); | |
| 3202 if (new_size == NULL) // Negative length arrays will produce weird | |
| 3203 new_size = TypeInt::ZERO; // intermediate dead fast-path goo | |
| 3204 if (new_size == size()) return this; | |
| 3205 const TypeAry* new_ary = TypeAry::make(elem(), new_size); | |
| 3206 return make(ptr(), const_oop(), new_ary, klass(), klass_is_exact(), _offset); | |
| 3207 } | |
| 3208 | |
| 3209 | |
| 3210 //------------------------------eq--------------------------------------------- | |
| 3211 // Structural equality check for Type representations | |
| 3212 bool TypeAryPtr::eq( const Type *t ) const { | |
| 3213 const TypeAryPtr *p = t->is_aryptr(); | |
| 3214 return | |
| 3215 _ary == p->_ary && // Check array | |
| 3216 TypeOopPtr::eq(p); // Check sub-parts | |
| 3217 } | |
| 3218 | |
| 3219 //------------------------------hash------------------------------------------- | |
| 3220 // Type-specific hashing function. | |
| 3221 int TypeAryPtr::hash(void) const { | |
| 3222 return (intptr_t)_ary + TypeOopPtr::hash(); | |
| 3223 } | |
| 3224 | |
| 3225 //------------------------------meet------------------------------------------- | |
| 3226 // Compute the MEET of two types. It returns a new Type object. | |
| 3227 const Type *TypeAryPtr::xmeet( const Type *t ) const { | |
| 3228 // Perform a fast test for common case; meeting the same types together. | |
| 3229 if( this == t ) return this; // Meeting same type-rep? | |
| 3230 // Current "this->_base" is Pointer | |
| 3231 switch (t->base()) { // switch on original type | |
| 3232 | |
| 3233 // Mixing ints & oops happens when javac reuses local variables | |
| 3234 case Int: | |
| 3235 case Long: | |
| 3236 case FloatTop: | |
| 3237 case FloatCon: | |
| 3238 case FloatBot: | |
| 3239 case DoubleTop: | |
| 3240 case DoubleCon: | |
| 3241 case DoubleBot: | |
|
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3242 case NarrowOop: |
| 0 | 3243 case Bottom: // Ye Olde Default |
| 3244 return Type::BOTTOM; | |
| 3245 case Top: | |
| 3246 return this; | |
| 3247 | |
| 3248 default: // All else is a mistake | |
| 3249 typerr(t); | |
| 3250 | |
| 3251 case OopPtr: { // Meeting to OopPtrs | |
| 3252 // Found a OopPtr type vs self-AryPtr type | |
| 3253 const TypePtr *tp = t->is_oopptr(); | |
| 3254 int offset = meet_offset(tp->offset()); | |
| 3255 PTR ptr = meet_ptr(tp->ptr()); | |
| 3256 switch (tp->ptr()) { | |
| 3257 case TopPTR: | |
| 3258 case AnyNull: | |
| 3259 return make(ptr, (ptr == Constant ? const_oop() : NULL), _ary, _klass, _klass_is_exact, offset); | |
| 3260 case BotPTR: | |
| 3261 case NotNull: | |
| 3262 return TypeOopPtr::make(ptr, offset); | |
| 3263 default: ShouldNotReachHere(); | |
| 3264 } | |
| 3265 } | |
| 3266 | |
| 3267 case AnyPtr: { // Meeting two AnyPtrs | |
| 3268 // Found an AnyPtr type vs self-AryPtr type | |
| 3269 const TypePtr *tp = t->is_ptr(); | |
| 3270 int offset = meet_offset(tp->offset()); | |
| 3271 PTR ptr = meet_ptr(tp->ptr()); | |
| 3272 switch (tp->ptr()) { | |
| 3273 case TopPTR: | |
| 3274 return this; | |
| 3275 case BotPTR: | |
| 3276 case NotNull: | |
| 3277 return TypePtr::make(AnyPtr, ptr, offset); | |
| 3278 case Null: | |
| 3279 if( ptr == Null ) return TypePtr::make(AnyPtr, ptr, offset); | |
| 3280 case AnyNull: | |
| 3281 return make( ptr, (ptr == Constant ? const_oop() : NULL), _ary, _klass, _klass_is_exact, offset ); | |
| 3282 default: ShouldNotReachHere(); | |
| 3283 } | |
| 3284 } | |
| 3285 | |
| 3286 case RawPtr: return TypePtr::BOTTOM; | |
| 3287 | |
| 3288 case AryPtr: { // Meeting 2 references? | |
| 3289 const TypeAryPtr *tap = t->is_aryptr(); | |
| 3290 int off = meet_offset(tap->offset()); | |
| 3291 const TypeAry *tary = _ary->meet(tap->_ary)->is_ary(); | |
| 3292 PTR ptr = meet_ptr(tap->ptr()); | |
| 3293 int iid = meet_instance(tap->instance_id()); | |
| 3294 ciKlass* lazy_klass = NULL; | |
| 3295 if (tary->_elem->isa_int()) { | |
| 3296 // Integral array element types have irrelevant lattice relations. | |
| 3297 // It is the klass that determines array layout, not the element type. | |
| 3298 if (_klass == NULL) | |
| 3299 lazy_klass = tap->_klass; | |
| 3300 else if (tap->_klass == NULL || tap->_klass == _klass) { | |
| 3301 lazy_klass = _klass; | |
| 3302 } else { | |
| 3303 // Something like byte[int+] meets char[int+]. | |
| 3304 // This must fall to bottom, not (int[-128..65535])[int+]. | |
| 3305 tary = TypeAry::make(Type::BOTTOM, tary->_size); | |
| 3306 } | |
| 3307 } | |
| 3308 bool xk; | |
| 3309 switch (tap->ptr()) { | |
| 3310 case AnyNull: | |
| 3311 case TopPTR: | |
| 3312 // Compute new klass on demand, do not use tap->_klass | |
| 3313 xk = (tap->_klass_is_exact | this->_klass_is_exact); | |
|
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3314 return make( ptr, const_oop(), tary, lazy_klass, xk, off, iid ); |
| 0 | 3315 case Constant: { |
| 3316 ciObject* o = const_oop(); | |
| 3317 if( _ptr == Constant ) { | |
| 3318 if( tap->const_oop() != NULL && !o->equals(tap->const_oop()) ) { | |
| 3319 ptr = NotNull; | |
| 3320 o = NULL; | |
| 3321 } | |
| 3322 } else if( above_centerline(_ptr) ) { | |
| 3323 o = tap->const_oop(); | |
| 3324 } | |
| 3325 xk = true; | |
|
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3326 return TypeAryPtr::make( ptr, o, tary, tap->_klass, xk, off, iid ); |
| 0 | 3327 } |
| 3328 case NotNull: | |
| 3329 case BotPTR: | |
| 3330 // Compute new klass on demand, do not use tap->_klass | |
| 3331 if (above_centerline(this->_ptr)) | |
| 3332 xk = tap->_klass_is_exact; | |
| 3333 else if (above_centerline(tap->_ptr)) | |
| 3334 xk = this->_klass_is_exact; | |
| 3335 else xk = (tap->_klass_is_exact & this->_klass_is_exact) && | |
| 3336 (klass() == tap->klass()); // Only precise for identical arrays | |
| 3337 return TypeAryPtr::make( ptr, NULL, tary, lazy_klass, xk, off, iid ); | |
| 3338 default: ShouldNotReachHere(); | |
| 3339 } | |
| 3340 } | |
| 3341 | |
| 3342 // All arrays inherit from Object class | |
| 3343 case InstPtr: { | |
| 3344 const TypeInstPtr *tp = t->is_instptr(); | |
| 3345 int offset = meet_offset(tp->offset()); | |
| 3346 PTR ptr = meet_ptr(tp->ptr()); | |
| 3347 int iid = meet_instance(tp->instance_id()); | |
| 3348 switch (ptr) { | |
| 3349 case TopPTR: | |
| 3350 case AnyNull: // Fall 'down' to dual of object klass | |
| 3351 if( tp->klass()->equals(ciEnv::current()->Object_klass()) ) { | |
| 3352 return TypeAryPtr::make( ptr, _ary, _klass, _klass_is_exact, offset, iid ); | |
| 3353 } else { | |
| 3354 // cannot subclass, so the meet has to fall badly below the centerline | |
| 3355 ptr = NotNull; | |
| 3356 return TypeInstPtr::make( ptr, ciEnv::current()->Object_klass(), false, NULL,offset, iid); | |
| 3357 } | |
| 3358 case Constant: | |
| 3359 case NotNull: | |
| 3360 case BotPTR: // Fall down to object klass | |
| 3361 // LCA is object_klass, but if we subclass from the top we can do better | |
| 3362 if (above_centerline(tp->ptr())) { | |
| 3363 // If 'tp' is above the centerline and it is Object class | |
| 3364 // then we can subclass in the Java class heirarchy. | |
| 3365 if( tp->klass()->equals(ciEnv::current()->Object_klass()) ) { | |
| 3366 // that is, my array type is a subtype of 'tp' klass | |
| 3367 return make( ptr, _ary, _klass, _klass_is_exact, offset, iid ); | |
| 3368 } | |
| 3369 } | |
| 3370 // The other case cannot happen, since t cannot be a subtype of an array. | |
| 3371 // The meet falls down to Object class below centerline. | |
| 3372 if( ptr == Constant ) | |
| 3373 ptr = NotNull; | |
| 3374 return TypeInstPtr::make( ptr, ciEnv::current()->Object_klass(), false, NULL,offset, iid); | |
| 3375 default: typerr(t); | |
| 3376 } | |
| 3377 } | |
| 3378 | |
| 3379 case KlassPtr: | |
| 3380 return TypeInstPtr::BOTTOM; | |
| 3381 | |
| 3382 } | |
| 3383 return this; // Lint noise | |
| 3384 } | |
| 3385 | |
| 3386 //------------------------------xdual------------------------------------------ | |
| 3387 // Dual: compute field-by-field dual | |
| 3388 const Type *TypeAryPtr::xdual() const { | |
| 3389 return new TypeAryPtr( dual_ptr(), _const_oop, _ary->dual()->is_ary(),_klass, _klass_is_exact, dual_offset(), dual_instance() ); | |
| 3390 } | |
| 3391 | |
| 3392 //------------------------------dump2------------------------------------------ | |
| 3393 #ifndef PRODUCT | |
| 3394 void TypeAryPtr::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 3395 _ary->dump2(d,depth,st); | |
| 3396 switch( _ptr ) { | |
| 3397 case Constant: | |
| 3398 const_oop()->print(st); | |
| 3399 break; | |
| 3400 case BotPTR: | |
| 3401 if (!WizardMode && !Verbose) { | |
| 3402 if( _klass_is_exact ) st->print(":exact"); | |
| 3403 break; | |
| 3404 } | |
| 3405 case TopPTR: | |
| 3406 case AnyNull: | |
| 3407 case NotNull: | |
| 3408 st->print(":%s", ptr_msg[_ptr]); | |
| 3409 if( _klass_is_exact ) st->print(":exact"); | |
| 3410 break; | |
| 3411 } | |
| 3412 | |
|
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3413 if( _offset != 0 ) { |
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3414 int header_size = objArrayOopDesc::header_size() * wordSize; |
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3415 if( _offset == OffsetTop ) st->print("+undefined"); |
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3416 else if( _offset == OffsetBot ) st->print("+any"); |
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3417 else if( _offset < header_size ) st->print("+%d", _offset); |
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3418 else { |
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3419 BasicType basic_elem_type = elem()->basic_type(); |
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3420 int array_base = arrayOopDesc::base_offset_in_bytes(basic_elem_type); |
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3421 int elem_size = type2aelembytes(basic_elem_type); |
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3422 st->print("[%d]", (_offset - array_base)/elem_size); |
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3423 } |
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|
3424 } |
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|
3425 st->print(" *"); |
| 0 | 3426 if (_instance_id != UNKNOWN_INSTANCE) |
| 3427 st->print(",iid=%d",_instance_id); | |
| 3428 } | |
| 3429 #endif | |
| 3430 | |
| 3431 bool TypeAryPtr::empty(void) const { | |
| 3432 if (_ary->empty()) return true; | |
| 3433 return TypeOopPtr::empty(); | |
| 3434 } | |
| 3435 | |
| 3436 //------------------------------add_offset------------------------------------- | |
| 3437 const TypePtr *TypeAryPtr::add_offset( int offset ) const { | |
| 3438 return make( _ptr, _const_oop, _ary, _klass, _klass_is_exact, xadd_offset(offset), _instance_id ); | |
| 3439 } | |
| 3440 | |
| 3441 | |
| 3442 //============================================================================= | |
|
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3443 const TypeNarrowOop *TypeNarrowOop::BOTTOM; |
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3444 const TypeNarrowOop *TypeNarrowOop::NULL_PTR; |
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3445 |
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3446 |
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3447 const TypeNarrowOop* TypeNarrowOop::make(const TypePtr* type) { |
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3448 return (const TypeNarrowOop*)(new TypeNarrowOop(type))->hashcons(); |
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3449 } |
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3450 |
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3451 //------------------------------hash------------------------------------------- |
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3452 // Type-specific hashing function. |
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3453 int TypeNarrowOop::hash(void) const { |
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3454 return _ooptype->hash() + 7; |
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3455 } |
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3456 |
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3457 |
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3458 bool TypeNarrowOop::eq( const Type *t ) const { |
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3459 const TypeNarrowOop* tc = t->isa_narrowoop(); |
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3460 if (tc != NULL) { |
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3461 if (_ooptype->base() != tc->_ooptype->base()) { |
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3462 return false; |
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3463 } |
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3464 return tc->_ooptype->eq(_ooptype); |
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3465 } |
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3466 return false; |
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3467 } |
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3468 |
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3469 bool TypeNarrowOop::singleton(void) const { // TRUE if type is a singleton |
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3470 return _ooptype->singleton(); |
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3471 } |
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3472 |
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3473 bool TypeNarrowOop::empty(void) const { |
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3474 return _ooptype->empty(); |
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3475 } |
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3476 |
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|
3477 //------------------------------meet------------------------------------------- |
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3478 // Compute the MEET of two types. It returns a new Type object. |
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3479 const Type *TypeNarrowOop::xmeet( const Type *t ) const { |
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|
3480 // Perform a fast test for common case; meeting the same types together. |
|
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3481 if( this == t ) return this; // Meeting same type-rep? |
|
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|
3482 |
|
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|
3483 |
|
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|
3484 // Current "this->_base" is OopPtr |
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|
3485 switch (t->base()) { // switch on original type |
|
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3486 |
|
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|
3487 case Int: // Mixing ints & oops happens when javac |
|
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3488 case Long: // reuses local variables |
|
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|
3489 case FloatTop: |
|
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|
3490 case FloatCon: |
|
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|
3491 case FloatBot: |
|
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|
3492 case DoubleTop: |
|
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|
3493 case DoubleCon: |
|
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|
3494 case DoubleBot: |
|
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|
3495 case Bottom: // Ye Olde Default |
|
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|
3496 return Type::BOTTOM; |
|
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|
3497 case Top: |
|
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|
3498 return this; |
|
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|
3499 |
|
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|
3500 case NarrowOop: { |
|
221
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|
3501 const Type* result = _ooptype->xmeet(t->make_ptr()); |
|
113
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|
3502 if (result->isa_ptr()) { |
|
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|
3503 return TypeNarrowOop::make(result->is_ptr()); |
|
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|
3504 } |
|
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|
3505 return result; |
|
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|
3506 } |
|
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|
3507 |
|
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|
3508 default: // All else is a mistake |
|
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|
3509 typerr(t); |
|
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|
3510 |
|
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|
3511 case RawPtr: |
|
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|
3512 case AnyPtr: |
|
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|
3513 case OopPtr: |
|
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|
3514 case InstPtr: |
|
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|
3515 case KlassPtr: |
|
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|
3516 case AryPtr: |
|
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|
3517 typerr(t); |
|
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|
3518 return Type::BOTTOM; |
|
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|
3519 |
|
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|
3520 } // End of switch |
|
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|
3521 } |
|
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|
3522 |
|
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|
3523 const Type *TypeNarrowOop::xdual() const { // Compute dual right now. |
|
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|
3524 const TypePtr* odual = _ooptype->dual()->is_ptr(); |
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|
3525 return new TypeNarrowOop(odual); |
|
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|
3526 } |
|
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|
3527 |
|
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|
3528 const Type *TypeNarrowOop::filter( const Type *kills ) const { |
|
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|
3529 if (kills->isa_narrowoop()) { |
|
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|
3530 const Type* ft =_ooptype->filter(kills->is_narrowoop()->_ooptype); |
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|
3531 if (ft->empty()) |
|
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|
3532 return Type::TOP; // Canonical empty value |
|
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|
3533 if (ft->isa_ptr()) { |
|
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|
3534 return make(ft->isa_ptr()); |
|
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|
3535 } |
|
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|
3536 return ft; |
|
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|
3537 } else if (kills->isa_ptr()) { |
|
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|
3538 const Type* ft = _ooptype->join(kills); |
|
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|
3539 if (ft->empty()) |
|
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|
3540 return Type::TOP; // Canonical empty value |
|
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|
3541 return ft; |
|
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|
3542 } else { |
|
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|
3543 return Type::TOP; |
|
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|
3544 } |
|
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|
3545 } |
|
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|
3546 |
|
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|
3547 |
|
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|
3548 intptr_t TypeNarrowOop::get_con() const { |
|
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|
3549 return _ooptype->get_con(); |
|
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|
3550 } |
|
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|
3551 |
|
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|
3552 #ifndef PRODUCT |
|
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|
3553 void TypeNarrowOop::dump2( Dict & d, uint depth, outputStream *st ) const { |
|
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|
3554 tty->print("narrowoop: "); |
|
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|
3555 _ooptype->dump2(d, depth, st); |
|
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|
3556 } |
|
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|
3557 #endif |
|
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|
3558 |
|
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|
3559 |
|
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|
3560 //============================================================================= |
| 0 | 3561 // Convenience common pre-built types. |
| 3562 | |
| 3563 // Not-null object klass or below | |
| 3564 const TypeKlassPtr *TypeKlassPtr::OBJECT; | |
| 3565 const TypeKlassPtr *TypeKlassPtr::OBJECT_OR_NULL; | |
| 3566 | |
| 3567 //------------------------------TypeKlasPtr------------------------------------ | |
| 3568 TypeKlassPtr::TypeKlassPtr( PTR ptr, ciKlass* klass, int offset ) | |
| 3569 : TypeOopPtr(KlassPtr, ptr, klass, (ptr==Constant), (ptr==Constant ? klass : NULL), offset, 0) { | |
| 3570 } | |
| 3571 | |
| 3572 //------------------------------make------------------------------------------- | |
| 3573 // ptr to klass 'k', if Constant, or possibly to a sub-klass if not a Constant | |
| 3574 const TypeKlassPtr *TypeKlassPtr::make( PTR ptr, ciKlass* k, int offset ) { | |
| 3575 assert( k != NULL, "Expect a non-NULL klass"); | |
| 3576 assert(k->is_instance_klass() || k->is_array_klass() || | |
| 3577 k->is_method_klass(), "Incorrect type of klass oop"); | |
| 3578 TypeKlassPtr *r = | |
| 3579 (TypeKlassPtr*)(new TypeKlassPtr(ptr, k, offset))->hashcons(); | |
| 3580 | |
| 3581 return r; | |
| 3582 } | |
| 3583 | |
| 3584 //------------------------------eq--------------------------------------------- | |
| 3585 // Structural equality check for Type representations | |
| 3586 bool TypeKlassPtr::eq( const Type *t ) const { | |
| 3587 const TypeKlassPtr *p = t->is_klassptr(); | |
| 3588 return | |
| 3589 klass()->equals(p->klass()) && | |
| 3590 TypeOopPtr::eq(p); | |
| 3591 } | |
| 3592 | |
| 3593 //------------------------------hash------------------------------------------- | |
| 3594 // Type-specific hashing function. | |
| 3595 int TypeKlassPtr::hash(void) const { | |
| 3596 return klass()->hash() + TypeOopPtr::hash(); | |
| 3597 } | |
| 3598 | |
| 3599 | |
| 3600 //------------------------------klass------------------------------------------ | |
| 3601 // Return the defining klass for this class | |
| 3602 ciKlass* TypeAryPtr::klass() const { | |
| 3603 if( _klass ) return _klass; // Return cached value, if possible | |
| 3604 | |
| 3605 // Oops, need to compute _klass and cache it | |
| 3606 ciKlass* k_ary = NULL; | |
| 3607 const TypeInstPtr *tinst; | |
| 3608 const TypeAryPtr *tary; | |
|
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3609 const Type* el = elem(); |
|
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|
3610 if (el->isa_narrowoop()) { |
|
221
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|
3611 el = el->make_ptr(); |
|
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|
3612 } |
|
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|
3613 |
| 0 | 3614 // Get element klass |
|
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|
3615 if ((tinst = el->isa_instptr()) != NULL) { |
| 0 | 3616 // Compute array klass from element klass |
| 3617 k_ary = ciObjArrayKlass::make(tinst->klass()); | |
|
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|
3618 } else if ((tary = el->isa_aryptr()) != NULL) { |
| 0 | 3619 // Compute array klass from element klass |
| 3620 ciKlass* k_elem = tary->klass(); | |
| 3621 // If element type is something like bottom[], k_elem will be null. | |
| 3622 if (k_elem != NULL) | |
| 3623 k_ary = ciObjArrayKlass::make(k_elem); | |
|
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|
3624 } else if ((el->base() == Type::Top) || |
|
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|
3625 (el->base() == Type::Bottom)) { |
| 0 | 3626 // element type of Bottom occurs from meet of basic type |
| 3627 // and object; Top occurs when doing join on Bottom. | |
| 3628 // Leave k_ary at NULL. | |
| 3629 } else { | |
| 3630 // Cannot compute array klass directly from basic type, | |
| 3631 // since subtypes of TypeInt all have basic type T_INT. | |
|
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|
3632 assert(!el->isa_int(), |
| 0 | 3633 "integral arrays must be pre-equipped with a class"); |
| 3634 // Compute array klass directly from basic type | |
|
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|
3635 k_ary = ciTypeArrayKlass::make(el->basic_type()); |
| 0 | 3636 } |
| 3637 | |
| 163 | 3638 if( this != TypeAryPtr::OOPS ) { |
| 0 | 3639 // The _klass field acts as a cache of the underlying |
| 3640 // ciKlass for this array type. In order to set the field, | |
| 3641 // we need to cast away const-ness. | |
| 3642 // | |
| 3643 // IMPORTANT NOTE: we *never* set the _klass field for the | |
| 3644 // type TypeAryPtr::OOPS. This Type is shared between all | |
| 3645 // active compilations. However, the ciKlass which represents | |
| 3646 // this Type is *not* shared between compilations, so caching | |
| 3647 // this value would result in fetching a dangling pointer. | |
| 3648 // | |
| 3649 // Recomputing the underlying ciKlass for each request is | |
| 3650 // a bit less efficient than caching, but calls to | |
| 3651 // TypeAryPtr::OOPS->klass() are not common enough to matter. | |
| 3652 ((TypeAryPtr*)this)->_klass = k_ary; | |
| 163 | 3653 if (UseCompressedOops && k_ary != NULL && k_ary->is_obj_array_klass() && |
| 3654 _offset != 0 && _offset != arrayOopDesc::length_offset_in_bytes()) { | |
| 3655 ((TypeAryPtr*)this)->_is_ptr_to_narrowoop = true; | |
| 3656 } | |
| 3657 } | |
| 0 | 3658 return k_ary; |
| 3659 } | |
| 3660 | |
| 3661 | |
| 3662 //------------------------------add_offset------------------------------------- | |
| 3663 // Access internals of klass object | |
| 3664 const TypePtr *TypeKlassPtr::add_offset( int offset ) const { | |
| 3665 return make( _ptr, klass(), xadd_offset(offset) ); | |
| 3666 } | |
| 3667 | |
| 3668 //------------------------------cast_to_ptr_type------------------------------- | |
| 3669 const Type *TypeKlassPtr::cast_to_ptr_type(PTR ptr) const { | |
| 3670 assert(_base == OopPtr, "subclass must override cast_to_ptr_type"); | |
| 3671 if( ptr == _ptr ) return this; | |
| 3672 return make(ptr, _klass, _offset); | |
| 3673 } | |
| 3674 | |
| 3675 | |
| 3676 //-----------------------------cast_to_exactness------------------------------- | |
| 3677 const Type *TypeKlassPtr::cast_to_exactness(bool klass_is_exact) const { | |
| 3678 if( klass_is_exact == _klass_is_exact ) return this; | |
| 3679 if (!UseExactTypes) return this; | |
| 3680 return make(klass_is_exact ? Constant : NotNull, _klass, _offset); | |
| 3681 } | |
| 3682 | |
| 3683 | |
| 3684 //-----------------------------as_instance_type-------------------------------- | |
| 3685 // Corresponding type for an instance of the given class. | |
| 3686 // It will be NotNull, and exact if and only if the klass type is exact. | |
| 3687 const TypeOopPtr* TypeKlassPtr::as_instance_type() const { | |
| 3688 ciKlass* k = klass(); | |
| 3689 bool xk = klass_is_exact(); | |
| 3690 //return TypeInstPtr::make(TypePtr::NotNull, k, xk, NULL, 0); | |
| 3691 const TypeOopPtr* toop = TypeOopPtr::make_from_klass_raw(k); | |
| 3692 toop = toop->cast_to_ptr_type(TypePtr::NotNull)->is_oopptr(); | |
| 3693 return toop->cast_to_exactness(xk)->is_oopptr(); | |
| 3694 } | |
| 3695 | |
| 3696 | |
| 3697 //------------------------------xmeet------------------------------------------ | |
| 3698 // Compute the MEET of two types, return a new Type object. | |
| 3699 const Type *TypeKlassPtr::xmeet( const Type *t ) const { | |
| 3700 // Perform a fast test for common case; meeting the same types together. | |
| 3701 if( this == t ) return this; // Meeting same type-rep? | |
| 3702 | |
| 3703 // Current "this->_base" is Pointer | |
| 3704 switch (t->base()) { // switch on original type | |
| 3705 | |
| 3706 case Int: // Mixing ints & oops happens when javac | |
| 3707 case Long: // reuses local variables | |
| 3708 case FloatTop: | |
| 3709 case FloatCon: | |
| 3710 case FloatBot: | |
| 3711 case DoubleTop: | |
| 3712 case DoubleCon: | |
| 3713 case DoubleBot: | |
| 3714 case Bottom: // Ye Olde Default | |
| 3715 return Type::BOTTOM; | |
| 3716 case Top: | |
| 3717 return this; | |
| 3718 | |
| 3719 default: // All else is a mistake | |
| 3720 typerr(t); | |
| 3721 | |
| 3722 case RawPtr: return TypePtr::BOTTOM; | |
| 3723 | |
| 3724 case OopPtr: { // Meeting to OopPtrs | |
| 3725 // Found a OopPtr type vs self-KlassPtr type | |
| 3726 const TypePtr *tp = t->is_oopptr(); | |
| 3727 int offset = meet_offset(tp->offset()); | |
| 3728 PTR ptr = meet_ptr(tp->ptr()); | |
| 3729 switch (tp->ptr()) { | |
| 3730 case TopPTR: | |
| 3731 case AnyNull: | |
| 3732 return make(ptr, klass(), offset); | |
| 3733 case BotPTR: | |
| 3734 case NotNull: | |
| 3735 return TypePtr::make(AnyPtr, ptr, offset); | |
| 3736 default: typerr(t); | |
| 3737 } | |
| 3738 } | |
| 3739 | |
| 3740 case AnyPtr: { // Meeting to AnyPtrs | |
| 3741 // Found an AnyPtr type vs self-KlassPtr type | |
| 3742 const TypePtr *tp = t->is_ptr(); | |
| 3743 int offset = meet_offset(tp->offset()); | |
| 3744 PTR ptr = meet_ptr(tp->ptr()); | |
| 3745 switch (tp->ptr()) { | |
| 3746 case TopPTR: | |
| 3747 return this; | |
| 3748 case Null: | |
| 3749 if( ptr == Null ) return TypePtr::make( AnyPtr, ptr, offset ); | |
| 3750 case AnyNull: | |
| 3751 return make( ptr, klass(), offset ); | |
| 3752 case BotPTR: | |
| 3753 case NotNull: | |
| 3754 return TypePtr::make(AnyPtr, ptr, offset); | |
| 3755 default: typerr(t); | |
| 3756 } | |
| 3757 } | |
| 3758 | |
| 3759 case AryPtr: // Meet with AryPtr | |
| 3760 case InstPtr: // Meet with InstPtr | |
| 3761 return TypeInstPtr::BOTTOM; | |
| 3762 | |
| 3763 // | |
| 3764 // A-top } | |
| 3765 // / | \ } Tops | |
| 3766 // B-top A-any C-top } | |
| 3767 // | / | \ | } Any-nulls | |
| 3768 // B-any | C-any } | |
| 3769 // | | | | |
| 3770 // B-con A-con C-con } constants; not comparable across classes | |
| 3771 // | | | | |
| 3772 // B-not | C-not } | |
| 3773 // | \ | / | } not-nulls | |
| 3774 // B-bot A-not C-bot } | |
| 3775 // \ | / } Bottoms | |
| 3776 // A-bot } | |
| 3777 // | |
| 3778 | |
| 3779 case KlassPtr: { // Meet two KlassPtr types | |
| 3780 const TypeKlassPtr *tkls = t->is_klassptr(); | |
| 3781 int off = meet_offset(tkls->offset()); | |
| 3782 PTR ptr = meet_ptr(tkls->ptr()); | |
| 3783 | |
| 3784 // Check for easy case; klasses are equal (and perhaps not loaded!) | |
| 3785 // If we have constants, then we created oops so classes are loaded | |
| 3786 // and we can handle the constants further down. This case handles | |
| 3787 // not-loaded classes | |
| 3788 if( ptr != Constant && tkls->klass()->equals(klass()) ) { | |
| 3789 return make( ptr, klass(), off ); | |
| 3790 } | |
| 3791 | |
| 3792 // Classes require inspection in the Java klass hierarchy. Must be loaded. | |
| 3793 ciKlass* tkls_klass = tkls->klass(); | |
| 3794 ciKlass* this_klass = this->klass(); | |
| 3795 assert( tkls_klass->is_loaded(), "This class should have been loaded."); | |
| 3796 assert( this_klass->is_loaded(), "This class should have been loaded."); | |
| 3797 | |
| 3798 // If 'this' type is above the centerline and is a superclass of the | |
| 3799 // other, we can treat 'this' as having the same type as the other. | |
| 3800 if ((above_centerline(this->ptr())) && | |
| 3801 tkls_klass->is_subtype_of(this_klass)) { | |
| 3802 this_klass = tkls_klass; | |
| 3803 } | |
| 3804 // If 'tinst' type is above the centerline and is a superclass of the | |
| 3805 // other, we can treat 'tinst' as having the same type as the other. | |
| 3806 if ((above_centerline(tkls->ptr())) && | |
| 3807 this_klass->is_subtype_of(tkls_klass)) { | |
| 3808 tkls_klass = this_klass; | |
| 3809 } | |
| 3810 | |
| 3811 // Check for classes now being equal | |
| 3812 if (tkls_klass->equals(this_klass)) { | |
| 3813 // If the klasses are equal, the constants may still differ. Fall to | |
| 3814 // NotNull if they do (neither constant is NULL; that is a special case | |
| 3815 // handled elsewhere). | |
| 3816 ciObject* o = NULL; // Assume not constant when done | |
| 3817 ciObject* this_oop = const_oop(); | |
| 3818 ciObject* tkls_oop = tkls->const_oop(); | |
| 3819 if( ptr == Constant ) { | |
| 3820 if (this_oop != NULL && tkls_oop != NULL && | |
| 3821 this_oop->equals(tkls_oop) ) | |
| 3822 o = this_oop; | |
| 3823 else if (above_centerline(this->ptr())) | |
| 3824 o = tkls_oop; | |
| 3825 else if (above_centerline(tkls->ptr())) | |
| 3826 o = this_oop; | |
| 3827 else | |
| 3828 ptr = NotNull; | |
| 3829 } | |
| 3830 return make( ptr, this_klass, off ); | |
| 3831 } // Else classes are not equal | |
| 3832 | |
| 3833 // Since klasses are different, we require the LCA in the Java | |
| 3834 // class hierarchy - which means we have to fall to at least NotNull. | |
| 3835 if( ptr == TopPTR || ptr == AnyNull || ptr == Constant ) | |
| 3836 ptr = NotNull; | |
| 3837 // Now we find the LCA of Java classes | |
| 3838 ciKlass* k = this_klass->least_common_ancestor(tkls_klass); | |
| 3839 return make( ptr, k, off ); | |
| 3840 } // End of case KlassPtr | |
| 3841 | |
| 3842 } // End of switch | |
| 3843 return this; // Return the double constant | |
| 3844 } | |
| 3845 | |
| 3846 //------------------------------xdual------------------------------------------ | |
| 3847 // Dual: compute field-by-field dual | |
| 3848 const Type *TypeKlassPtr::xdual() const { | |
| 3849 return new TypeKlassPtr( dual_ptr(), klass(), dual_offset() ); | |
| 3850 } | |
| 3851 | |
| 3852 //------------------------------dump2------------------------------------------ | |
| 3853 // Dump Klass Type | |
| 3854 #ifndef PRODUCT | |
| 3855 void TypeKlassPtr::dump2( Dict & d, uint depth, outputStream *st ) const { | |
| 3856 switch( _ptr ) { | |
| 3857 case Constant: | |
| 3858 st->print("precise "); | |
| 3859 case NotNull: | |
| 3860 { | |
| 3861 const char *name = klass()->name()->as_utf8(); | |
| 3862 if( name ) { | |
| 3863 st->print("klass %s: " INTPTR_FORMAT, name, klass()); | |
| 3864 } else { | |
| 3865 ShouldNotReachHere(); | |
| 3866 } | |
| 3867 } | |
| 3868 case BotPTR: | |
| 3869 if( !WizardMode && !Verbose && !_klass_is_exact ) break; | |
| 3870 case TopPTR: | |
| 3871 case AnyNull: | |
| 3872 st->print(":%s", ptr_msg[_ptr]); | |
| 3873 if( _klass_is_exact ) st->print(":exact"); | |
| 3874 break; | |
| 3875 } | |
| 3876 | |
| 3877 if( _offset ) { // Dump offset, if any | |
| 3878 if( _offset == OffsetBot ) { st->print("+any"); } | |
| 3879 else if( _offset == OffsetTop ) { st->print("+unknown"); } | |
| 3880 else { st->print("+%d", _offset); } | |
| 3881 } | |
| 3882 | |
| 3883 st->print(" *"); | |
| 3884 } | |
| 3885 #endif | |
| 3886 | |
| 3887 | |
| 3888 | |
| 3889 //============================================================================= | |
| 3890 // Convenience common pre-built types. | |
| 3891 | |
| 3892 //------------------------------make------------------------------------------- | |
| 3893 const TypeFunc *TypeFunc::make( const TypeTuple *domain, const TypeTuple *range ) { | |
| 3894 return (TypeFunc*)(new TypeFunc(domain,range))->hashcons(); | |
| 3895 } | |
| 3896 | |
| 3897 //------------------------------make------------------------------------------- | |
| 3898 const TypeFunc *TypeFunc::make(ciMethod* method) { | |
| 3899 Compile* C = Compile::current(); | |
| 3900 const TypeFunc* tf = C->last_tf(method); // check cache | |
| 3901 if (tf != NULL) return tf; // The hit rate here is almost 50%. | |
| 3902 const TypeTuple *domain; | |
| 3903 if (method->flags().is_static()) { | |
| 3904 domain = TypeTuple::make_domain(NULL, method->signature()); | |
| 3905 } else { | |
| 3906 domain = TypeTuple::make_domain(method->holder(), method->signature()); | |
| 3907 } | |
| 3908 const TypeTuple *range = TypeTuple::make_range(method->signature()); | |
| 3909 tf = TypeFunc::make(domain, range); | |
| 3910 C->set_last_tf(method, tf); // fill cache | |
| 3911 return tf; | |
| 3912 } | |
| 3913 | |
| 3914 //------------------------------meet------------------------------------------- | |
| 3915 // Compute the MEET of two types. It returns a new Type object. | |
| 3916 const Type *TypeFunc::xmeet( const Type *t ) const { | |
| 3917 // Perform a fast test for common case; meeting the same types together. | |
| 3918 if( this == t ) return this; // Meeting same type-rep? | |
| 3919 | |
| 3920 // Current "this->_base" is Func | |
| 3921 switch (t->base()) { // switch on original type | |
| 3922 | |
| 3923 case Bottom: // Ye Olde Default | |
| 3924 return t; | |
| 3925 | |
| 3926 default: // All else is a mistake | |
| 3927 typerr(t); | |
| 3928 | |
| 3929 case Top: | |
| 3930 break; | |
| 3931 } | |
| 3932 return this; // Return the double constant | |
| 3933 } | |
| 3934 | |
| 3935 //------------------------------xdual------------------------------------------ | |
| 3936 // Dual: compute field-by-field dual | |
| 3937 const Type *TypeFunc::xdual() const { | |
| 3938 return this; | |
| 3939 } | |
| 3940 | |
| 3941 //------------------------------eq--------------------------------------------- | |
| 3942 // Structural equality check for Type representations | |
| 3943 bool TypeFunc::eq( const Type *t ) const { | |
| 3944 const TypeFunc *a = (const TypeFunc*)t; | |
| 3945 return _domain == a->_domain && | |
| 3946 _range == a->_range; | |
| 3947 } | |
| 3948 | |
| 3949 //------------------------------hash------------------------------------------- | |
| 3950 // Type-specific hashing function. | |
| 3951 int TypeFunc::hash(void) const { | |
| 3952 return (intptr_t)_domain + (intptr_t)_range; | |
| 3953 } | |
| 3954 | |
| 3955 //------------------------------dump2------------------------------------------ | |
| 3956 // Dump Function Type | |
| 3957 #ifndef PRODUCT | |
| 3958 void TypeFunc::dump2( Dict &d, uint depth, outputStream *st ) const { | |
| 3959 if( _range->_cnt <= Parms ) | |
| 3960 st->print("void"); | |
| 3961 else { | |
| 3962 uint i; | |
| 3963 for (i = Parms; i < _range->_cnt-1; i++) { | |
| 3964 _range->field_at(i)->dump2(d,depth,st); | |
| 3965 st->print("/"); | |
| 3966 } | |
| 3967 _range->field_at(i)->dump2(d,depth,st); | |
| 3968 } | |
| 3969 st->print(" "); | |
| 3970 st->print("( "); | |
| 3971 if( !depth || d[this] ) { // Check for recursive dump | |
| 3972 st->print("...)"); | |
| 3973 return; | |
| 3974 } | |
| 3975 d.Insert((void*)this,(void*)this); // Stop recursion | |
| 3976 if (Parms < _domain->_cnt) | |
| 3977 _domain->field_at(Parms)->dump2(d,depth-1,st); | |
| 3978 for (uint i = Parms+1; i < _domain->_cnt; i++) { | |
| 3979 st->print(", "); | |
| 3980 _domain->field_at(i)->dump2(d,depth-1,st); | |
| 3981 } | |
| 3982 st->print(" )"); | |
| 3983 } | |
| 3984 | |
| 3985 //------------------------------print_flattened-------------------------------- | |
| 3986 // Print a 'flattened' signature | |
| 3987 static const char * const flat_type_msg[Type::lastype] = { | |
|
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6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
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parents:
64
diff
changeset
|
3988 "bad","control","top","int","long","_", "narrowoop", |
| 0 | 3989 "tuple:", "array:", |
| 3990 "ptr", "rawptr", "ptr", "ptr", "ptr", "ptr", | |
| 3991 "func", "abIO", "return_address", "mem", | |
| 3992 "float_top", "ftcon:", "flt", | |
| 3993 "double_top", "dblcon:", "dbl", | |
| 3994 "bottom" | |
| 3995 }; | |
| 3996 | |
| 3997 void TypeFunc::print_flattened() const { | |
| 3998 if( _range->_cnt <= Parms ) | |
| 3999 tty->print("void"); | |
| 4000 else { | |
| 4001 uint i; | |
| 4002 for (i = Parms; i < _range->_cnt-1; i++) | |
| 4003 tty->print("%s/",flat_type_msg[_range->field_at(i)->base()]); | |
| 4004 tty->print("%s",flat_type_msg[_range->field_at(i)->base()]); | |
| 4005 } | |
| 4006 tty->print(" ( "); | |
| 4007 if (Parms < _domain->_cnt) | |
| 4008 tty->print("%s",flat_type_msg[_domain->field_at(Parms)->base()]); | |
| 4009 for (uint i = Parms+1; i < _domain->_cnt; i++) | |
| 4010 tty->print(", %s",flat_type_msg[_domain->field_at(i)->base()]); | |
| 4011 tty->print(" )"); | |
| 4012 } | |
| 4013 #endif | |
| 4014 | |
| 4015 //------------------------------singleton-------------------------------------- | |
| 4016 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple | |
| 4017 // constants (Ldi nodes). Singletons are integer, float or double constants | |
| 4018 // or a single symbol. | |
| 4019 bool TypeFunc::singleton(void) const { | |
| 4020 return false; // Never a singleton | |
| 4021 } | |
| 4022 | |
| 4023 bool TypeFunc::empty(void) const { | |
| 4024 return false; // Never empty | |
| 4025 } | |
| 4026 | |
| 4027 | |
| 4028 BasicType TypeFunc::return_type() const{ | |
| 4029 if (range()->cnt() == TypeFunc::Parms) { | |
| 4030 return T_VOID; | |
| 4031 } | |
| 4032 return range()->field_at(TypeFunc::Parms)->basic_type(); | |
| 4033 } |