1 /*
2 * Copyright (c) 1997, 2025, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "ci/ciMethodData.hpp"
26 #include "ci/ciTypeFlow.hpp"
27 #include "classfile/javaClasses.hpp"
28 #include "classfile/symbolTable.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "compiler/compileLog.hpp"
31 #include "libadt/dict.hpp"
32 #include "memory/oopFactory.hpp"
33 #include "memory/resourceArea.hpp"
34 #include "oops/instanceKlass.hpp"
35 #include "oops/instanceMirrorKlass.hpp"
36 #include "oops/objArrayKlass.hpp"
37 #include "oops/typeArrayKlass.hpp"
38 #include "opto/callnode.hpp"
39 #include "opto/arraycopynode.hpp"
40 #include "opto/matcher.hpp"
41 #include "opto/node.hpp"
42 #include "opto/opcodes.hpp"
43 #include "opto/runtime.hpp"
44 #include "opto/type.hpp"
45 #include "utilities/checkedCast.hpp"
46 #include "utilities/powerOfTwo.hpp"
47 #include "utilities/stringUtils.hpp"
48 #include "runtime/stubRoutines.hpp"
49
50 // Portions of code courtesy of Clifford Click
51
52 // Optimization - Graph Style
53
54 // Dictionary of types shared among compilations.
55 Dict* Type::_shared_type_dict = nullptr;
56
57 // Array which maps compiler types to Basic Types
58 const Type::TypeInfo Type::_type_info[Type::lastype] = {
59 { Bad, T_ILLEGAL, "bad", false, Node::NotAMachineReg, relocInfo::none }, // Bad
60 { Control, T_ILLEGAL, "control", false, 0, relocInfo::none }, // Control
61 { Bottom, T_VOID, "top", false, 0, relocInfo::none }, // Top
62 { Bad, T_INT, "int:", false, Op_RegI, relocInfo::none }, // Int
63 { Bad, T_LONG, "long:", false, Op_RegL, relocInfo::none }, // Long
64 { Half, T_VOID, "half", false, 0, relocInfo::none }, // Half
65 { Bad, T_NARROWOOP, "narrowoop:", false, Op_RegN, relocInfo::none }, // NarrowOop
66 { Bad, T_NARROWKLASS,"narrowklass:", false, Op_RegN, relocInfo::none }, // NarrowKlass
67 { Bad, T_ILLEGAL, "tuple:", false, Node::NotAMachineReg, relocInfo::none }, // Tuple
68 { Bad, T_ARRAY, "array:", false, Node::NotAMachineReg, relocInfo::none }, // Array
69 { Bad, T_ARRAY, "interfaces:", false, Node::NotAMachineReg, relocInfo::none }, // Interfaces
70
71 #if defined(PPC64)
72 { Bad, T_ILLEGAL, "vectormask:", false, Op_RegVectMask, relocInfo::none }, // VectorMask.
73 { Bad, T_ILLEGAL, "vectora:", false, Op_VecA, relocInfo::none }, // VectorA.
74 { Bad, T_ILLEGAL, "vectors:", false, 0, relocInfo::none }, // VectorS
75 { Bad, T_ILLEGAL, "vectord:", false, Op_RegL, relocInfo::none }, // VectorD
76 { Bad, T_ILLEGAL, "vectorx:", false, Op_VecX, relocInfo::none }, // VectorX
77 { Bad, T_ILLEGAL, "vectory:", false, 0, relocInfo::none }, // VectorY
78 { Bad, T_ILLEGAL, "vectorz:", false, 0, relocInfo::none }, // VectorZ
79 #elif defined(S390)
80 { Bad, T_ILLEGAL, "vectormask:", false, Op_RegVectMask, relocInfo::none }, // VectorMask.
81 { Bad, T_ILLEGAL, "vectora:", false, Op_VecA, relocInfo::none }, // VectorA.
82 { Bad, T_ILLEGAL, "vectors:", false, 0, relocInfo::none }, // VectorS
83 { Bad, T_ILLEGAL, "vectord:", false, Op_RegL, relocInfo::none }, // VectorD
84 { Bad, T_ILLEGAL, "vectorx:", false, Op_VecX, relocInfo::none }, // VectorX
85 { Bad, T_ILLEGAL, "vectory:", false, 0, relocInfo::none }, // VectorY
86 { Bad, T_ILLEGAL, "vectorz:", false, 0, relocInfo::none }, // VectorZ
87 #else // all other
88 { Bad, T_ILLEGAL, "vectormask:", false, Op_RegVectMask, relocInfo::none }, // VectorMask.
89 { Bad, T_ILLEGAL, "vectora:", false, Op_VecA, relocInfo::none }, // VectorA.
90 { Bad, T_ILLEGAL, "vectors:", false, Op_VecS, relocInfo::none }, // VectorS
91 { Bad, T_ILLEGAL, "vectord:", false, Op_VecD, relocInfo::none }, // VectorD
92 { Bad, T_ILLEGAL, "vectorx:", false, Op_VecX, relocInfo::none }, // VectorX
93 { Bad, T_ILLEGAL, "vectory:", false, Op_VecY, relocInfo::none }, // VectorY
94 { Bad, T_ILLEGAL, "vectorz:", false, Op_VecZ, relocInfo::none }, // VectorZ
95 #endif
96 { Bad, T_ADDRESS, "anyptr:", false, Op_RegP, relocInfo::none }, // AnyPtr
97 { Bad, T_ADDRESS, "rawptr:", false, Op_RegP, relocInfo::none }, // RawPtr
98 { Bad, T_OBJECT, "oop:", true, Op_RegP, relocInfo::oop_type }, // OopPtr
99 { Bad, T_OBJECT, "inst:", true, Op_RegP, relocInfo::oop_type }, // InstPtr
100 { Bad, T_OBJECT, "ary:", true, Op_RegP, relocInfo::oop_type }, // AryPtr
101 { Bad, T_METADATA, "metadata:", false, Op_RegP, relocInfo::metadata_type }, // MetadataPtr
102 { Bad, T_METADATA, "klass:", false, Op_RegP, relocInfo::metadata_type }, // KlassPtr
103 { Bad, T_METADATA, "instklass:", false, Op_RegP, relocInfo::metadata_type }, // InstKlassPtr
104 { Bad, T_METADATA, "aryklass:", false, Op_RegP, relocInfo::metadata_type }, // AryKlassPtr
105 { Bad, T_OBJECT, "func", false, 0, relocInfo::none }, // Function
106 { Abio, T_ILLEGAL, "abIO", false, 0, relocInfo::none }, // Abio
107 { Return_Address, T_ADDRESS, "return_address",false, Op_RegP, relocInfo::none }, // Return_Address
108 { Memory, T_ILLEGAL, "memory", false, 0, relocInfo::none }, // Memory
109 { HalfFloatBot, T_SHORT, "halffloat_top", false, Op_RegF, relocInfo::none }, // HalfFloatTop
110 { HalfFloatCon, T_SHORT, "hfcon:", false, Op_RegF, relocInfo::none }, // HalfFloatCon
111 { HalfFloatTop, T_SHORT, "short", false, Op_RegF, relocInfo::none }, // HalfFloatBot
112 { FloatBot, T_FLOAT, "float_top", false, Op_RegF, relocInfo::none }, // FloatTop
113 { FloatCon, T_FLOAT, "ftcon:", false, Op_RegF, relocInfo::none }, // FloatCon
114 { FloatTop, T_FLOAT, "float", false, Op_RegF, relocInfo::none }, // FloatBot
115 { DoubleBot, T_DOUBLE, "double_top", false, Op_RegD, relocInfo::none }, // DoubleTop
116 { DoubleCon, T_DOUBLE, "dblcon:", false, Op_RegD, relocInfo::none }, // DoubleCon
117 { DoubleTop, T_DOUBLE, "double", false, Op_RegD, relocInfo::none }, // DoubleBot
118 { Top, T_ILLEGAL, "bottom", false, 0, relocInfo::none } // Bottom
119 };
120
121 // Map ideal registers (machine types) to ideal types
122 const Type *Type::mreg2type[_last_machine_leaf];
123
124 // Map basic types to canonical Type* pointers.
125 const Type* Type:: _const_basic_type[T_CONFLICT+1];
126
127 // Map basic types to constant-zero Types.
128 const Type* Type:: _zero_type[T_CONFLICT+1];
129
130 // Map basic types to array-body alias types.
131 const TypeAryPtr* TypeAryPtr::_array_body_type[T_CONFLICT+1];
132 const TypeInterfaces* TypeAryPtr::_array_interfaces = nullptr;
133 const TypeInterfaces* TypeAryKlassPtr::_array_interfaces = nullptr;
134
135 //=============================================================================
136 // Convenience common pre-built types.
137 const Type *Type::ABIO; // State-of-machine only
138 const Type *Type::BOTTOM; // All values
139 const Type *Type::CONTROL; // Control only
140 const Type *Type::DOUBLE; // All doubles
141 const Type *Type::HALF_FLOAT; // All half floats
142 const Type *Type::FLOAT; // All floats
143 const Type *Type::HALF; // Placeholder half of doublewide type
144 const Type *Type::MEMORY; // Abstract store only
145 const Type *Type::RETURN_ADDRESS;
146 const Type *Type::TOP; // No values in set
147
148 //------------------------------get_const_type---------------------------
149 const Type* Type::get_const_type(ciType* type, InterfaceHandling interface_handling) {
150 if (type == nullptr) {
151 return nullptr;
152 } else if (type->is_primitive_type()) {
153 return get_const_basic_type(type->basic_type());
154 } else {
155 return TypeOopPtr::make_from_klass(type->as_klass(), interface_handling);
156 }
157 }
158
159 //---------------------------array_element_basic_type---------------------------------
160 // Mapping to the array element's basic type.
161 BasicType Type::array_element_basic_type() const {
162 BasicType bt = basic_type();
163 if (bt == T_INT) {
164 if (this == TypeInt::INT) return T_INT;
165 if (this == TypeInt::CHAR) return T_CHAR;
166 if (this == TypeInt::BYTE) return T_BYTE;
167 if (this == TypeInt::BOOL) return T_BOOLEAN;
168 if (this == TypeInt::SHORT) return T_SHORT;
169 return T_VOID;
170 }
171 return bt;
172 }
173
174 // For two instance arrays of same dimension, return the base element types.
175 // Otherwise or if the arrays have different dimensions, return null.
176 void Type::get_arrays_base_elements(const Type *a1, const Type *a2,
177 const TypeInstPtr **e1, const TypeInstPtr **e2) {
178
179 if (e1) *e1 = nullptr;
180 if (e2) *e2 = nullptr;
181 const TypeAryPtr* a1tap = (a1 == nullptr) ? nullptr : a1->isa_aryptr();
182 const TypeAryPtr* a2tap = (a2 == nullptr) ? nullptr : a2->isa_aryptr();
183
184 if (a1tap != nullptr && a2tap != nullptr) {
185 // Handle multidimensional arrays
186 const TypePtr* a1tp = a1tap->elem()->make_ptr();
187 const TypePtr* a2tp = a2tap->elem()->make_ptr();
188 while (a1tp && a1tp->isa_aryptr() && a2tp && a2tp->isa_aryptr()) {
189 a1tap = a1tp->is_aryptr();
190 a2tap = a2tp->is_aryptr();
191 a1tp = a1tap->elem()->make_ptr();
192 a2tp = a2tap->elem()->make_ptr();
193 }
194 if (a1tp && a1tp->isa_instptr() && a2tp && a2tp->isa_instptr()) {
195 if (e1) *e1 = a1tp->is_instptr();
196 if (e2) *e2 = a2tp->is_instptr();
197 }
198 }
199 }
200
201 //---------------------------get_typeflow_type---------------------------------
202 // Import a type produced by ciTypeFlow.
203 const Type* Type::get_typeflow_type(ciType* type) {
204 switch (type->basic_type()) {
205
206 case ciTypeFlow::StateVector::T_BOTTOM:
207 assert(type == ciTypeFlow::StateVector::bottom_type(), "");
208 return Type::BOTTOM;
209
210 case ciTypeFlow::StateVector::T_TOP:
211 assert(type == ciTypeFlow::StateVector::top_type(), "");
212 return Type::TOP;
213
214 case ciTypeFlow::StateVector::T_NULL:
215 assert(type == ciTypeFlow::StateVector::null_type(), "");
216 return TypePtr::NULL_PTR;
217
218 case ciTypeFlow::StateVector::T_LONG2:
219 // The ciTypeFlow pass pushes a long, then the half.
220 // We do the same.
221 assert(type == ciTypeFlow::StateVector::long2_type(), "");
222 return TypeInt::TOP;
223
224 case ciTypeFlow::StateVector::T_DOUBLE2:
225 // The ciTypeFlow pass pushes double, then the half.
226 // Our convention is the same.
227 assert(type == ciTypeFlow::StateVector::double2_type(), "");
228 return Type::TOP;
229
230 case T_ADDRESS:
231 assert(type->is_return_address(), "");
232 return TypeRawPtr::make((address)(intptr_t)type->as_return_address()->bci());
233
234 default:
235 // make sure we did not mix up the cases:
236 assert(type != ciTypeFlow::StateVector::bottom_type(), "");
237 assert(type != ciTypeFlow::StateVector::top_type(), "");
238 assert(type != ciTypeFlow::StateVector::null_type(), "");
239 assert(type != ciTypeFlow::StateVector::long2_type(), "");
240 assert(type != ciTypeFlow::StateVector::double2_type(), "");
241 assert(!type->is_return_address(), "");
242
243 return Type::get_const_type(type);
244 }
245 }
246
247
248 //-----------------------make_from_constant------------------------------------
249 const Type* Type::make_from_constant(ciConstant constant, bool require_constant,
250 int stable_dimension, bool is_narrow_oop,
251 bool is_autobox_cache) {
252 switch (constant.basic_type()) {
253 case T_BOOLEAN: return TypeInt::make(constant.as_boolean());
254 case T_CHAR: return TypeInt::make(constant.as_char());
255 case T_BYTE: return TypeInt::make(constant.as_byte());
256 case T_SHORT: return TypeInt::make(constant.as_short());
257 case T_INT: return TypeInt::make(constant.as_int());
258 case T_LONG: return TypeLong::make(constant.as_long());
259 case T_FLOAT: return TypeF::make(constant.as_float());
260 case T_DOUBLE: return TypeD::make(constant.as_double());
261 case T_ARRAY:
262 case T_OBJECT: {
263 const Type* con_type = nullptr;
264 ciObject* oop_constant = constant.as_object();
265 if (oop_constant->is_null_object()) {
266 con_type = Type::get_zero_type(T_OBJECT);
267 } else {
268 guarantee(require_constant || oop_constant->should_be_constant(), "con_type must get computed");
269 con_type = TypeOopPtr::make_from_constant(oop_constant, require_constant);
270 if (Compile::current()->eliminate_boxing() && is_autobox_cache) {
271 con_type = con_type->is_aryptr()->cast_to_autobox_cache();
272 }
273 if (stable_dimension > 0) {
274 assert(FoldStableValues, "sanity");
275 assert(!con_type->is_zero_type(), "default value for stable field");
276 con_type = con_type->is_aryptr()->cast_to_stable(true, stable_dimension);
277 }
278 }
279 if (is_narrow_oop) {
280 con_type = con_type->make_narrowoop();
281 }
282 return con_type;
283 }
284 case T_ILLEGAL:
285 // Invalid ciConstant returned due to OutOfMemoryError in the CI
286 assert(Compile::current()->env()->failing(), "otherwise should not see this");
287 return nullptr;
288 default:
289 // Fall through to failure
290 return nullptr;
291 }
292 }
293
294 static ciConstant check_mismatched_access(ciConstant con, BasicType loadbt, bool is_unsigned) {
295 BasicType conbt = con.basic_type();
296 switch (conbt) {
297 case T_BOOLEAN: conbt = T_BYTE; break;
298 case T_ARRAY: conbt = T_OBJECT; break;
299 default: break;
300 }
301 switch (loadbt) {
302 case T_BOOLEAN: loadbt = T_BYTE; break;
303 case T_NARROWOOP: loadbt = T_OBJECT; break;
304 case T_ARRAY: loadbt = T_OBJECT; break;
305 case T_ADDRESS: loadbt = T_OBJECT; break;
306 default: break;
307 }
308 if (conbt == loadbt) {
309 if (is_unsigned && conbt == T_BYTE) {
310 // LoadB (T_BYTE) with a small mask (<=8-bit) is converted to LoadUB (T_BYTE).
311 return ciConstant(T_INT, con.as_int() & 0xFF);
312 } else {
313 return con;
314 }
315 }
316 if (conbt == T_SHORT && loadbt == T_CHAR) {
317 // LoadS (T_SHORT) with a small mask (<=16-bit) is converted to LoadUS (T_CHAR).
318 return ciConstant(T_INT, con.as_int() & 0xFFFF);
319 }
320 return ciConstant(); // T_ILLEGAL
321 }
322
323 // Try to constant-fold a stable array element.
324 const Type* Type::make_constant_from_array_element(ciArray* array, int off, int stable_dimension,
325 BasicType loadbt, bool is_unsigned_load) {
326 // Decode the results of GraphKit::array_element_address.
327 ciConstant element_value = array->element_value_by_offset(off);
328 if (element_value.basic_type() == T_ILLEGAL) {
329 return nullptr; // wrong offset
330 }
331 ciConstant con = check_mismatched_access(element_value, loadbt, is_unsigned_load);
332
333 assert(con.basic_type() != T_ILLEGAL, "elembt=%s; loadbt=%s; unsigned=%d",
334 type2name(element_value.basic_type()), type2name(loadbt), is_unsigned_load);
335
336 if (con.is_valid() && // not a mismatched access
337 !con.is_null_or_zero()) { // not a default value
338 bool is_narrow_oop = (loadbt == T_NARROWOOP);
339 return Type::make_from_constant(con, /*require_constant=*/true, stable_dimension, is_narrow_oop, /*is_autobox_cache=*/false);
340 }
341 return nullptr;
342 }
343
344 const Type* Type::make_constant_from_field(ciInstance* holder, int off, bool is_unsigned_load, BasicType loadbt) {
345 ciField* field;
346 ciType* type = holder->java_mirror_type();
347 if (type != nullptr && type->is_instance_klass() && off >= InstanceMirrorKlass::offset_of_static_fields()) {
348 // Static field
349 field = type->as_instance_klass()->get_field_by_offset(off, /*is_static=*/true);
350 } else {
351 // Instance field
352 field = holder->klass()->as_instance_klass()->get_field_by_offset(off, /*is_static=*/false);
353 }
354 if (field == nullptr) {
355 return nullptr; // Wrong offset
356 }
357 return Type::make_constant_from_field(field, holder, loadbt, is_unsigned_load);
358 }
359
360 const Type* Type::make_constant_from_field(ciField* field, ciInstance* holder,
361 BasicType loadbt, bool is_unsigned_load) {
362 if (!field->is_constant()) {
363 return nullptr; // Non-constant field
364 }
365 ciConstant field_value;
366 if (field->is_static()) {
367 // final static field
368 field_value = field->constant_value();
369 } else if (holder != nullptr) {
370 // final or stable non-static field
371 // Treat final non-static fields of trusted classes (classes in
372 // java.lang.invoke and sun.invoke packages and subpackages) as
373 // compile time constants.
374 field_value = field->constant_value_of(holder);
375 }
376 if (!field_value.is_valid()) {
377 return nullptr; // Not a constant
378 }
379
380 ciConstant con = check_mismatched_access(field_value, loadbt, is_unsigned_load);
381
382 assert(con.is_valid(), "elembt=%s; loadbt=%s; unsigned=%d",
383 type2name(field_value.basic_type()), type2name(loadbt), is_unsigned_load);
384
385 bool is_stable_array = FoldStableValues && field->is_stable() && field->type()->is_array_klass();
386 int stable_dimension = (is_stable_array ? field->type()->as_array_klass()->dimension() : 0);
387 bool is_narrow_oop = (loadbt == T_NARROWOOP);
388
389 const Type* con_type = make_from_constant(con, /*require_constant=*/ true,
390 stable_dimension, is_narrow_oop,
391 field->is_autobox_cache());
392 if (con_type != nullptr && field->is_call_site_target()) {
393 ciCallSite* call_site = holder->as_call_site();
394 if (!call_site->is_fully_initialized_constant_call_site()) {
395 ciMethodHandle* target = con.as_object()->as_method_handle();
396 Compile::current()->dependencies()->assert_call_site_target_value(call_site, target);
397 }
398 }
399 return con_type;
400 }
401
402 //------------------------------make-------------------------------------------
403 // Create a simple Type, with default empty symbol sets. Then hashcons it
404 // and look for an existing copy in the type dictionary.
405 const Type *Type::make( enum TYPES t ) {
406 return (new Type(t))->hashcons();
407 }
408
409 //------------------------------cmp--------------------------------------------
410 bool Type::equals(const Type* t1, const Type* t2) {
411 if (t1->_base != t2->_base) {
412 return false; // Missed badly
413 }
414
415 assert(t1 != t2 || t1->eq(t2), "eq must be reflexive");
416 return t1->eq(t2);
417 }
418
419 const Type* Type::maybe_remove_speculative(bool include_speculative) const {
420 if (!include_speculative) {
421 return remove_speculative();
422 }
423 return this;
424 }
425
426 //------------------------------hash-------------------------------------------
427 int Type::uhash( const Type *const t ) {
428 return (int)t->hash();
429 }
430
431 #define SMALLINT ((juint)3) // a value too insignificant to consider widening
432 #define POSITIVE_INFINITE_F 0x7f800000 // hex representation for IEEE 754 single precision positive infinite
433 #define POSITIVE_INFINITE_D 0x7ff0000000000000 // hex representation for IEEE 754 double precision positive infinite
434
435 //--------------------------Initialize_shared----------------------------------
436 void Type::Initialize_shared(Compile* current) {
437 // This method does not need to be locked because the first system
438 // compilations (stub compilations) occur serially. If they are
439 // changed to proceed in parallel, then this section will need
440 // locking.
441
442 Arena* save = current->type_arena();
443 Arena* shared_type_arena = new (mtCompiler)Arena(mtCompiler, Arena::Tag::tag_type);
444
445 current->set_type_arena(shared_type_arena);
446
447 // Map the boolean result of Type::equals into a comparator result that CmpKey expects.
448 CmpKey type_cmp = [](const void* t1, const void* t2) -> int32_t {
449 return Type::equals((Type*) t1, (Type*) t2) ? 0 : 1;
450 };
451
452 _shared_type_dict = new (shared_type_arena) Dict(type_cmp, (Hash) Type::uhash, shared_type_arena, 128);
453 current->set_type_dict(_shared_type_dict);
454
455 // Make shared pre-built types.
456 CONTROL = make(Control); // Control only
457 TOP = make(Top); // No values in set
458 MEMORY = make(Memory); // Abstract store only
459 ABIO = make(Abio); // State-of-machine only
460 RETURN_ADDRESS=make(Return_Address);
461 FLOAT = make(FloatBot); // All floats
462 HALF_FLOAT = make(HalfFloatBot); // All half floats
463 DOUBLE = make(DoubleBot); // All doubles
464 BOTTOM = make(Bottom); // Everything
465 HALF = make(Half); // Placeholder half of doublewide type
466
467 TypeF::MAX = TypeF::make(max_jfloat); // Float MAX
468 TypeF::MIN = TypeF::make(min_jfloat); // Float MIN
469 TypeF::ZERO = TypeF::make(0.0); // Float 0 (positive zero)
470 TypeF::ONE = TypeF::make(1.0); // Float 1
471 TypeF::POS_INF = TypeF::make(jfloat_cast(POSITIVE_INFINITE_F));
472 TypeF::NEG_INF = TypeF::make(-jfloat_cast(POSITIVE_INFINITE_F));
473
474 TypeH::MAX = TypeH::make(max_jfloat16); // HalfFloat MAX
475 TypeH::MIN = TypeH::make(min_jfloat16); // HalfFloat MIN
476 TypeH::ZERO = TypeH::make((jshort)0); // HalfFloat 0 (positive zero)
477 TypeH::ONE = TypeH::make(one_jfloat16); // HalfFloat 1
478 TypeH::POS_INF = TypeH::make(pos_inf_jfloat16);
479 TypeH::NEG_INF = TypeH::make(neg_inf_jfloat16);
480
481 TypeD::MAX = TypeD::make(max_jdouble); // Double MAX
482 TypeD::MIN = TypeD::make(min_jdouble); // Double MIN
483 TypeD::ZERO = TypeD::make(0.0); // Double 0 (positive zero)
484 TypeD::ONE = TypeD::make(1.0); // Double 1
485 TypeD::POS_INF = TypeD::make(jdouble_cast(POSITIVE_INFINITE_D));
486 TypeD::NEG_INF = TypeD::make(-jdouble_cast(POSITIVE_INFINITE_D));
487
488 TypeInt::MAX = TypeInt::make(max_jint); // Int MAX
489 TypeInt::MIN = TypeInt::make(min_jint); // Int MIN
490 TypeInt::MINUS_1 = TypeInt::make(-1); // -1
491 TypeInt::ZERO = TypeInt::make( 0); // 0
492 TypeInt::ONE = TypeInt::make( 1); // 1
493 TypeInt::BOOL = TypeInt::make(0,1, WidenMin); // 0 or 1, FALSE or TRUE.
494 TypeInt::CC = TypeInt::make(-1, 1, WidenMin); // -1, 0 or 1, condition codes
495 TypeInt::CC_LT = TypeInt::make(-1,-1, WidenMin); // == TypeInt::MINUS_1
496 TypeInt::CC_GT = TypeInt::make( 1, 1, WidenMin); // == TypeInt::ONE
497 TypeInt::CC_EQ = TypeInt::make( 0, 0, WidenMin); // == TypeInt::ZERO
498 TypeInt::CC_LE = TypeInt::make(-1, 0, WidenMin);
499 TypeInt::CC_GE = TypeInt::make( 0, 1, WidenMin); // == TypeInt::BOOL
500 TypeInt::BYTE = TypeInt::make(-128,127, WidenMin); // Bytes
501 TypeInt::UBYTE = TypeInt::make(0, 255, WidenMin); // Unsigned Bytes
502 TypeInt::CHAR = TypeInt::make(0,65535, WidenMin); // Java chars
503 TypeInt::SHORT = TypeInt::make(-32768,32767, WidenMin); // Java shorts
504 TypeInt::POS = TypeInt::make(0,max_jint, WidenMin); // Non-neg values
505 TypeInt::POS1 = TypeInt::make(1,max_jint, WidenMin); // Positive values
506 TypeInt::INT = TypeInt::make(min_jint,max_jint, WidenMax); // 32-bit integers
507 TypeInt::SYMINT = TypeInt::make(-max_jint,max_jint,WidenMin); // symmetric range
508 TypeInt::TYPE_DOMAIN = TypeInt::INT;
509 // CmpL is overloaded both as the bytecode computation returning
510 // a trinary (-1,0,+1) integer result AND as an efficient long
511 // compare returning optimizer ideal-type flags.
512 assert( TypeInt::CC_LT == TypeInt::MINUS_1, "types must match for CmpL to work" );
513 assert( TypeInt::CC_GT == TypeInt::ONE, "types must match for CmpL to work" );
514 assert( TypeInt::CC_EQ == TypeInt::ZERO, "types must match for CmpL to work" );
515 assert( TypeInt::CC_GE == TypeInt::BOOL, "types must match for CmpL to work" );
516 assert( (juint)(TypeInt::CC->_hi - TypeInt::CC->_lo) <= SMALLINT, "CC is truly small");
517
518 TypeLong::MAX = TypeLong::make(max_jlong); // Long MAX
519 TypeLong::MIN = TypeLong::make(min_jlong); // Long MIN
520 TypeLong::MINUS_1 = TypeLong::make(-1); // -1
521 TypeLong::ZERO = TypeLong::make( 0); // 0
522 TypeLong::ONE = TypeLong::make( 1); // 1
523 TypeLong::POS = TypeLong::make(0,max_jlong, WidenMin); // Non-neg values
524 TypeLong::LONG = TypeLong::make(min_jlong,max_jlong,WidenMax); // 64-bit integers
525 TypeLong::INT = TypeLong::make((jlong)min_jint,(jlong)max_jint,WidenMin);
526 TypeLong::UINT = TypeLong::make(0,(jlong)max_juint,WidenMin);
527 TypeLong::TYPE_DOMAIN = TypeLong::LONG;
528
529 const Type **fboth =(const Type**)shared_type_arena->AmallocWords(2*sizeof(Type*));
530 fboth[0] = Type::CONTROL;
531 fboth[1] = Type::CONTROL;
532 TypeTuple::IFBOTH = TypeTuple::make( 2, fboth );
533
534 const Type **ffalse =(const Type**)shared_type_arena->AmallocWords(2*sizeof(Type*));
535 ffalse[0] = Type::CONTROL;
536 ffalse[1] = Type::TOP;
537 TypeTuple::IFFALSE = TypeTuple::make( 2, ffalse );
538
539 const Type **fneither =(const Type**)shared_type_arena->AmallocWords(2*sizeof(Type*));
540 fneither[0] = Type::TOP;
541 fneither[1] = Type::TOP;
542 TypeTuple::IFNEITHER = TypeTuple::make( 2, fneither );
543
544 const Type **ftrue =(const Type**)shared_type_arena->AmallocWords(2*sizeof(Type*));
545 ftrue[0] = Type::TOP;
546 ftrue[1] = Type::CONTROL;
547 TypeTuple::IFTRUE = TypeTuple::make( 2, ftrue );
548
549 const Type **floop =(const Type**)shared_type_arena->AmallocWords(2*sizeof(Type*));
550 floop[0] = Type::CONTROL;
551 floop[1] = TypeInt::INT;
552 TypeTuple::LOOPBODY = TypeTuple::make( 2, floop );
553
554 TypePtr::NULL_PTR= TypePtr::make(AnyPtr, TypePtr::Null, 0);
555 TypePtr::NOTNULL = TypePtr::make(AnyPtr, TypePtr::NotNull, OffsetBot);
556 TypePtr::BOTTOM = TypePtr::make(AnyPtr, TypePtr::BotPTR, OffsetBot);
557
558 TypeRawPtr::BOTTOM = TypeRawPtr::make( TypePtr::BotPTR );
559 TypeRawPtr::NOTNULL= TypeRawPtr::make( TypePtr::NotNull );
560
561 const Type **fmembar = TypeTuple::fields(0);
562 TypeTuple::MEMBAR = TypeTuple::make(TypeFunc::Parms+0, fmembar);
563
564 const Type **fsc = (const Type**)shared_type_arena->AmallocWords(2*sizeof(Type*));
565 fsc[0] = TypeInt::CC;
566 fsc[1] = Type::MEMORY;
567 TypeTuple::STORECONDITIONAL = TypeTuple::make(2, fsc);
568
569 TypeInstPtr::NOTNULL = TypeInstPtr::make(TypePtr::NotNull, current->env()->Object_klass());
570 TypeInstPtr::BOTTOM = TypeInstPtr::make(TypePtr::BotPTR, current->env()->Object_klass());
571 TypeInstPtr::MIRROR = TypeInstPtr::make(TypePtr::NotNull, current->env()->Class_klass());
572 TypeInstPtr::MARK = TypeInstPtr::make(TypePtr::BotPTR, current->env()->Object_klass(),
573 false, nullptr, oopDesc::mark_offset_in_bytes());
574 TypeInstPtr::KLASS = TypeInstPtr::make(TypePtr::BotPTR, current->env()->Object_klass(),
575 false, nullptr, Type::klass_offset());
576 TypeOopPtr::BOTTOM = TypeOopPtr::make(TypePtr::BotPTR, OffsetBot, TypeOopPtr::InstanceBot);
577
578 TypeMetadataPtr::BOTTOM = TypeMetadataPtr::make(TypePtr::BotPTR, nullptr, OffsetBot);
579
580 TypeNarrowOop::NULL_PTR = TypeNarrowOop::make( TypePtr::NULL_PTR );
581 TypeNarrowOop::BOTTOM = TypeNarrowOop::make( TypeInstPtr::BOTTOM );
582
583 TypeNarrowKlass::NULL_PTR = TypeNarrowKlass::make( TypePtr::NULL_PTR );
584
585 mreg2type[Op_Node] = Type::BOTTOM;
586 mreg2type[Op_Set ] = nullptr;
587 mreg2type[Op_RegN] = TypeNarrowOop::BOTTOM;
588 mreg2type[Op_RegI] = TypeInt::INT;
589 mreg2type[Op_RegP] = TypePtr::BOTTOM;
590 mreg2type[Op_RegF] = Type::FLOAT;
591 mreg2type[Op_RegD] = Type::DOUBLE;
592 mreg2type[Op_RegL] = TypeLong::LONG;
593 mreg2type[Op_RegFlags] = TypeInt::CC;
594
595 GrowableArray<ciInstanceKlass*> array_interfaces;
596 array_interfaces.push(current->env()->Cloneable_klass());
597 array_interfaces.push(current->env()->Serializable_klass());
598 TypeAryPtr::_array_interfaces = TypeInterfaces::make(&array_interfaces);
599 TypeAryKlassPtr::_array_interfaces = TypeAryPtr::_array_interfaces;
600
601 TypeAryPtr::BOTTOM = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(Type::BOTTOM, TypeInt::POS), nullptr, false, Type::OffsetBot);
602 TypeAryPtr::RANGE = TypeAryPtr::make( TypePtr::BotPTR, TypeAry::make(Type::BOTTOM,TypeInt::POS), nullptr /* current->env()->Object_klass() */, false, arrayOopDesc::length_offset_in_bytes());
603
604 TypeAryPtr::NARROWOOPS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeNarrowOop::BOTTOM, TypeInt::POS), nullptr /*ciArrayKlass::make(o)*/, false, Type::OffsetBot);
605
606 #ifdef _LP64
607 if (UseCompressedOops) {
608 assert(TypeAryPtr::NARROWOOPS->is_ptr_to_narrowoop(), "array of narrow oops must be ptr to narrow oop");
609 TypeAryPtr::OOPS = TypeAryPtr::NARROWOOPS;
610 } else
611 #endif
612 {
613 // There is no shared klass for Object[]. See note in TypeAryPtr::klass().
614 TypeAryPtr::OOPS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInstPtr::BOTTOM,TypeInt::POS), nullptr /*ciArrayKlass::make(o)*/, false, Type::OffsetBot);
615 }
616 TypeAryPtr::BYTES = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::BYTE ,TypeInt::POS), ciTypeArrayKlass::make(T_BYTE), true, Type::OffsetBot);
617 TypeAryPtr::SHORTS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::SHORT ,TypeInt::POS), ciTypeArrayKlass::make(T_SHORT), true, Type::OffsetBot);
618 TypeAryPtr::CHARS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::CHAR ,TypeInt::POS), ciTypeArrayKlass::make(T_CHAR), true, Type::OffsetBot);
619 TypeAryPtr::INTS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::INT ,TypeInt::POS), ciTypeArrayKlass::make(T_INT), true, Type::OffsetBot);
620 TypeAryPtr::LONGS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeLong::LONG ,TypeInt::POS), ciTypeArrayKlass::make(T_LONG), true, Type::OffsetBot);
621 TypeAryPtr::FLOATS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(Type::FLOAT ,TypeInt::POS), ciTypeArrayKlass::make(T_FLOAT), true, Type::OffsetBot);
622 TypeAryPtr::DOUBLES = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(Type::DOUBLE ,TypeInt::POS), ciTypeArrayKlass::make(T_DOUBLE), true, Type::OffsetBot);
623
624 // Nobody should ask _array_body_type[T_NARROWOOP]. Use null as assert.
625 TypeAryPtr::_array_body_type[T_NARROWOOP] = nullptr;
626 TypeAryPtr::_array_body_type[T_OBJECT] = TypeAryPtr::OOPS;
627 TypeAryPtr::_array_body_type[T_ARRAY] = TypeAryPtr::OOPS; // arrays are stored in oop arrays
628 TypeAryPtr::_array_body_type[T_BYTE] = TypeAryPtr::BYTES;
629 TypeAryPtr::_array_body_type[T_BOOLEAN] = TypeAryPtr::BYTES; // boolean[] is a byte array
630 TypeAryPtr::_array_body_type[T_SHORT] = TypeAryPtr::SHORTS;
631 TypeAryPtr::_array_body_type[T_CHAR] = TypeAryPtr::CHARS;
632 TypeAryPtr::_array_body_type[T_INT] = TypeAryPtr::INTS;
633 TypeAryPtr::_array_body_type[T_LONG] = TypeAryPtr::LONGS;
634 TypeAryPtr::_array_body_type[T_FLOAT] = TypeAryPtr::FLOATS;
635 TypeAryPtr::_array_body_type[T_DOUBLE] = TypeAryPtr::DOUBLES;
636
637 TypeInstKlassPtr::OBJECT = TypeInstKlassPtr::make(TypePtr::NotNull, current->env()->Object_klass(), 0);
638 TypeInstKlassPtr::OBJECT_OR_NULL = TypeInstKlassPtr::make(TypePtr::BotPTR, current->env()->Object_klass(), 0);
639
640 const Type **fi2c = TypeTuple::fields(2);
641 fi2c[TypeFunc::Parms+0] = TypeInstPtr::BOTTOM; // Method*
642 fi2c[TypeFunc::Parms+1] = TypeRawPtr::BOTTOM; // argument pointer
643 TypeTuple::START_I2C = TypeTuple::make(TypeFunc::Parms+2, fi2c);
644
645 const Type **intpair = TypeTuple::fields(2);
646 intpair[0] = TypeInt::INT;
647 intpair[1] = TypeInt::INT;
648 TypeTuple::INT_PAIR = TypeTuple::make(2, intpair);
649
650 const Type **longpair = TypeTuple::fields(2);
651 longpair[0] = TypeLong::LONG;
652 longpair[1] = TypeLong::LONG;
653 TypeTuple::LONG_PAIR = TypeTuple::make(2, longpair);
654
655 const Type **intccpair = TypeTuple::fields(2);
656 intccpair[0] = TypeInt::INT;
657 intccpair[1] = TypeInt::CC;
658 TypeTuple::INT_CC_PAIR = TypeTuple::make(2, intccpair);
659
660 const Type **longccpair = TypeTuple::fields(2);
661 longccpair[0] = TypeLong::LONG;
662 longccpair[1] = TypeInt::CC;
663 TypeTuple::LONG_CC_PAIR = TypeTuple::make(2, longccpair);
664
665 _const_basic_type[T_NARROWOOP] = TypeNarrowOop::BOTTOM;
666 _const_basic_type[T_NARROWKLASS] = Type::BOTTOM;
667 _const_basic_type[T_BOOLEAN] = TypeInt::BOOL;
668 _const_basic_type[T_CHAR] = TypeInt::CHAR;
669 _const_basic_type[T_BYTE] = TypeInt::BYTE;
670 _const_basic_type[T_SHORT] = TypeInt::SHORT;
671 _const_basic_type[T_INT] = TypeInt::INT;
672 _const_basic_type[T_LONG] = TypeLong::LONG;
673 _const_basic_type[T_FLOAT] = Type::FLOAT;
674 _const_basic_type[T_DOUBLE] = Type::DOUBLE;
675 _const_basic_type[T_OBJECT] = TypeInstPtr::BOTTOM;
676 _const_basic_type[T_ARRAY] = TypeInstPtr::BOTTOM; // there is no separate bottom for arrays
677 _const_basic_type[T_VOID] = TypePtr::NULL_PTR; // reflection represents void this way
678 _const_basic_type[T_ADDRESS] = TypeRawPtr::BOTTOM; // both interpreter return addresses & random raw ptrs
679 _const_basic_type[T_CONFLICT] = Type::BOTTOM; // why not?
680
681 _zero_type[T_NARROWOOP] = TypeNarrowOop::NULL_PTR;
682 _zero_type[T_NARROWKLASS] = TypeNarrowKlass::NULL_PTR;
683 _zero_type[T_BOOLEAN] = TypeInt::ZERO; // false == 0
684 _zero_type[T_CHAR] = TypeInt::ZERO; // '\0' == 0
685 _zero_type[T_BYTE] = TypeInt::ZERO; // 0x00 == 0
686 _zero_type[T_SHORT] = TypeInt::ZERO; // 0x0000 == 0
687 _zero_type[T_INT] = TypeInt::ZERO;
688 _zero_type[T_LONG] = TypeLong::ZERO;
689 _zero_type[T_FLOAT] = TypeF::ZERO;
690 _zero_type[T_DOUBLE] = TypeD::ZERO;
691 _zero_type[T_OBJECT] = TypePtr::NULL_PTR;
692 _zero_type[T_ARRAY] = TypePtr::NULL_PTR; // null array is null oop
693 _zero_type[T_ADDRESS] = TypePtr::NULL_PTR; // raw pointers use the same null
694 _zero_type[T_VOID] = Type::TOP; // the only void value is no value at all
695
696 // get_zero_type() should not happen for T_CONFLICT
697 _zero_type[T_CONFLICT]= nullptr;
698
699 TypeVect::VECTMASK = (TypeVect*)(new TypeVectMask(T_BOOLEAN, MaxVectorSize))->hashcons();
700 mreg2type[Op_RegVectMask] = TypeVect::VECTMASK;
701
702 if (Matcher::supports_scalable_vector()) {
703 TypeVect::VECTA = TypeVect::make(T_BYTE, Matcher::scalable_vector_reg_size(T_BYTE));
704 }
705
706 // Vector predefined types, it needs initialized _const_basic_type[].
707 if (Matcher::vector_size_supported(T_BYTE, 4)) {
708 TypeVect::VECTS = TypeVect::make(T_BYTE, 4);
709 }
710 if (Matcher::vector_size_supported(T_FLOAT, 2)) {
711 TypeVect::VECTD = TypeVect::make(T_FLOAT, 2);
712 }
713 if (Matcher::vector_size_supported(T_FLOAT, 4)) {
714 TypeVect::VECTX = TypeVect::make(T_FLOAT, 4);
715 }
716 if (Matcher::vector_size_supported(T_FLOAT, 8)) {
717 TypeVect::VECTY = TypeVect::make(T_FLOAT, 8);
718 }
719 if (Matcher::vector_size_supported(T_FLOAT, 16)) {
720 TypeVect::VECTZ = TypeVect::make(T_FLOAT, 16);
721 }
722
723 mreg2type[Op_VecA] = TypeVect::VECTA;
724 mreg2type[Op_VecS] = TypeVect::VECTS;
725 mreg2type[Op_VecD] = TypeVect::VECTD;
726 mreg2type[Op_VecX] = TypeVect::VECTX;
727 mreg2type[Op_VecY] = TypeVect::VECTY;
728 mreg2type[Op_VecZ] = TypeVect::VECTZ;
729
730 LockNode::initialize_lock_Type();
731 ArrayCopyNode::initialize_arraycopy_Type();
732 OptoRuntime::initialize_types();
733
734 // Restore working type arena.
735 current->set_type_arena(save);
736 current->set_type_dict(nullptr);
737 }
738
739 //------------------------------Initialize-------------------------------------
740 void Type::Initialize(Compile* current) {
741 assert(current->type_arena() != nullptr, "must have created type arena");
742
743 if (_shared_type_dict == nullptr) {
744 Initialize_shared(current);
745 }
746
747 Arena* type_arena = current->type_arena();
748
749 // Create the hash-cons'ing dictionary with top-level storage allocation
750 Dict *tdic = new (type_arena) Dict(*_shared_type_dict, type_arena);
751 current->set_type_dict(tdic);
752 }
753
754 //------------------------------hashcons---------------------------------------
755 // Do the hash-cons trick. If the Type already exists in the type table,
756 // delete the current Type and return the existing Type. Otherwise stick the
757 // current Type in the Type table.
758 const Type *Type::hashcons(void) {
759 DEBUG_ONLY(base()); // Check the assertion in Type::base().
760 // Look up the Type in the Type dictionary
761 Dict *tdic = type_dict();
762 Type* old = (Type*)(tdic->Insert(this, this, false));
763 if( old ) { // Pre-existing Type?
764 if( old != this ) // Yes, this guy is not the pre-existing?
765 delete this; // Yes, Nuke this guy
766 assert( old->_dual, "" );
767 return old; // Return pre-existing
768 }
769
770 // Every type has a dual (to make my lattice symmetric).
771 // Since we just discovered a new Type, compute its dual right now.
772 assert( !_dual, "" ); // No dual yet
773 _dual = xdual(); // Compute the dual
774 if (equals(this, _dual)) { // Handle self-symmetric
775 if (_dual != this) {
776 delete _dual;
777 _dual = this;
778 }
779 return this;
780 }
781 assert( !_dual->_dual, "" ); // No reverse dual yet
782 assert( !(*tdic)[_dual], "" ); // Dual not in type system either
783 // New Type, insert into Type table
784 tdic->Insert((void*)_dual,(void*)_dual);
785 ((Type*)_dual)->_dual = this; // Finish up being symmetric
786 #ifdef ASSERT
787 Type *dual_dual = (Type*)_dual->xdual();
788 assert( eq(dual_dual), "xdual(xdual()) should be identity" );
789 delete dual_dual;
790 #endif
791 return this; // Return new Type
792 }
793
794 //------------------------------eq---------------------------------------------
795 // Structural equality check for Type representations
796 bool Type::eq( const Type * ) const {
797 return true; // Nothing else can go wrong
798 }
799
800 //------------------------------hash-------------------------------------------
801 // Type-specific hashing function.
802 uint Type::hash(void) const {
803 return _base;
804 }
805
806 //------------------------------is_finite--------------------------------------
807 // Has a finite value
808 bool Type::is_finite() const {
809 return false;
810 }
811
812 //------------------------------is_nan-----------------------------------------
813 // Is not a number (NaN)
814 bool Type::is_nan() const {
815 return false;
816 }
817
818 #ifdef ASSERT
819 class VerifyMeet;
820 class VerifyMeetResult : public ArenaObj {
821 friend class VerifyMeet;
822 friend class Type;
823 private:
824 class VerifyMeetResultEntry {
825 private:
826 const Type* _in1;
827 const Type* _in2;
828 const Type* _res;
829 public:
830 VerifyMeetResultEntry(const Type* in1, const Type* in2, const Type* res):
831 _in1(in1), _in2(in2), _res(res) {
832 }
833 VerifyMeetResultEntry():
834 _in1(nullptr), _in2(nullptr), _res(nullptr) {
835 }
836
837 bool operator==(const VerifyMeetResultEntry& rhs) const {
838 return _in1 == rhs._in1 &&
839 _in2 == rhs._in2 &&
840 _res == rhs._res;
841 }
842
843 bool operator!=(const VerifyMeetResultEntry& rhs) const {
844 return !(rhs == *this);
845 }
846
847 static int compare(const VerifyMeetResultEntry& v1, const VerifyMeetResultEntry& v2) {
848 if ((intptr_t) v1._in1 < (intptr_t) v2._in1) {
849 return -1;
850 } else if (v1._in1 == v2._in1) {
851 if ((intptr_t) v1._in2 < (intptr_t) v2._in2) {
852 return -1;
853 } else if (v1._in2 == v2._in2) {
854 assert(v1._res == v2._res || v1._res == nullptr || v2._res == nullptr, "same inputs should lead to same result");
855 return 0;
856 }
857 return 1;
858 }
859 return 1;
860 }
861 const Type* res() const { return _res; }
862 };
863 uint _depth;
864 GrowableArray<VerifyMeetResultEntry> _cache;
865
866 // With verification code, the meet of A and B causes the computation of:
867 // 1- meet(A, B)
868 // 2- meet(B, A)
869 // 3- meet(dual(meet(A, B)), dual(A))
870 // 4- meet(dual(meet(A, B)), dual(B))
871 // 5- meet(dual(A), dual(B))
872 // 6- meet(dual(B), dual(A))
873 // 7- meet(dual(meet(dual(A), dual(B))), A)
874 // 8- meet(dual(meet(dual(A), dual(B))), B)
875 //
876 // In addition the meet of A[] and B[] requires the computation of the meet of A and B.
877 //
878 // The meet of A[] and B[] triggers the computation of:
879 // 1- meet(A[], B[][)
880 // 1.1- meet(A, B)
881 // 1.2- meet(B, A)
882 // 1.3- meet(dual(meet(A, B)), dual(A))
883 // 1.4- meet(dual(meet(A, B)), dual(B))
884 // 1.5- meet(dual(A), dual(B))
885 // 1.6- meet(dual(B), dual(A))
886 // 1.7- meet(dual(meet(dual(A), dual(B))), A)
887 // 1.8- meet(dual(meet(dual(A), dual(B))), B)
888 // 2- meet(B[], A[])
889 // 2.1- meet(B, A) = 1.2
890 // 2.2- meet(A, B) = 1.1
891 // 2.3- meet(dual(meet(B, A)), dual(B)) = 1.4
892 // 2.4- meet(dual(meet(B, A)), dual(A)) = 1.3
893 // 2.5- meet(dual(B), dual(A)) = 1.6
894 // 2.6- meet(dual(A), dual(B)) = 1.5
895 // 2.7- meet(dual(meet(dual(B), dual(A))), B) = 1.8
896 // 2.8- meet(dual(meet(dual(B), dual(A))), B) = 1.7
897 // etc.
898 // The number of meet operations performed grows exponentially with the number of dimensions of the arrays but the number
899 // of different meet operations is linear in the number of dimensions. The function below caches meet results for the
900 // duration of the meet at the root of the recursive calls.
901 //
902 const Type* meet(const Type* t1, const Type* t2) {
903 bool found = false;
904 const VerifyMeetResultEntry meet(t1, t2, nullptr);
905 int pos = _cache.find_sorted<VerifyMeetResultEntry, VerifyMeetResultEntry::compare>(meet, found);
906 const Type* res = nullptr;
907 if (found) {
908 res = _cache.at(pos).res();
909 } else {
910 res = t1->xmeet(t2);
911 _cache.insert_sorted<VerifyMeetResultEntry::compare>(VerifyMeetResultEntry(t1, t2, res));
912 found = false;
913 _cache.find_sorted<VerifyMeetResultEntry, VerifyMeetResultEntry::compare>(meet, found);
914 assert(found, "should be in table after it's added");
915 }
916 return res;
917 }
918
919 void add(const Type* t1, const Type* t2, const Type* res) {
920 _cache.insert_sorted<VerifyMeetResultEntry::compare>(VerifyMeetResultEntry(t1, t2, res));
921 }
922
923 bool empty_cache() const {
924 return _cache.length() == 0;
925 }
926 public:
927 VerifyMeetResult(Compile* C) :
928 _depth(0), _cache(C->comp_arena(), 2, 0, VerifyMeetResultEntry()) {
929 }
930 };
931
932 void Type::assert_type_verify_empty() const {
933 assert(Compile::current()->_type_verify == nullptr || Compile::current()->_type_verify->empty_cache(), "cache should have been discarded");
934 }
935
936 class VerifyMeet {
937 private:
938 Compile* _C;
939 public:
940 VerifyMeet(Compile* C) : _C(C) {
941 if (C->_type_verify == nullptr) {
942 C->_type_verify = new (C->comp_arena())VerifyMeetResult(C);
943 }
944 _C->_type_verify->_depth++;
945 }
946
947 ~VerifyMeet() {
948 assert(_C->_type_verify->_depth != 0, "");
949 _C->_type_verify->_depth--;
950 if (_C->_type_verify->_depth == 0) {
951 _C->_type_verify->_cache.trunc_to(0);
952 }
953 }
954
955 const Type* meet(const Type* t1, const Type* t2) const {
956 return _C->_type_verify->meet(t1, t2);
957 }
958
959 void add(const Type* t1, const Type* t2, const Type* res) const {
960 _C->_type_verify->add(t1, t2, res);
961 }
962 };
963
964 void Type::check_symmetrical(const Type* t, const Type* mt, const VerifyMeet& verify) const {
965 Compile* C = Compile::current();
966 const Type* mt2 = verify.meet(t, this);
967 if (mt != mt2) {
968 tty->print_cr("=== Meet Not Commutative ===");
969 tty->print("t = "); t->dump(); tty->cr();
970 tty->print("this = "); dump(); tty->cr();
971 tty->print("t meet this = "); mt2->dump(); tty->cr();
972 tty->print("this meet t = "); mt->dump(); tty->cr();
973 fatal("meet not commutative");
974 }
975 const Type* dual_join = mt->_dual;
976 const Type* t2t = verify.meet(dual_join,t->_dual);
977 const Type* t2this = verify.meet(dual_join,this->_dual);
978
979 // Interface meet Oop is Not Symmetric:
980 // Interface:AnyNull meet Oop:AnyNull == Interface:AnyNull
981 // Interface:NotNull meet Oop:NotNull == java/lang/Object:NotNull
982
983 if (t2t != t->_dual || t2this != this->_dual) {
984 tty->print_cr("=== Meet Not Symmetric ===");
985 tty->print("t = "); t->dump(); tty->cr();
986 tty->print("this= "); dump(); tty->cr();
987 tty->print("mt=(t meet this)= "); mt->dump(); tty->cr();
988
989 tty->print("t_dual= "); t->_dual->dump(); tty->cr();
990 tty->print("this_dual= "); _dual->dump(); tty->cr();
991 tty->print("mt_dual= "); mt->_dual->dump(); tty->cr();
992
993 tty->print("mt_dual meet t_dual= "); t2t ->dump(); tty->cr();
994 tty->print("mt_dual meet this_dual= "); t2this ->dump(); tty->cr();
995
996 fatal("meet not symmetric");
997 }
998 }
999 #endif
1000
1001 //------------------------------meet-------------------------------------------
1002 // Compute the MEET of two types. NOT virtual. It enforces that meet is
1003 // commutative and the lattice is symmetric.
1004 const Type *Type::meet_helper(const Type *t, bool include_speculative) const {
1005 if (isa_narrowoop() && t->isa_narrowoop()) {
1006 const Type* result = make_ptr()->meet_helper(t->make_ptr(), include_speculative);
1007 return result->make_narrowoop();
1008 }
1009 if (isa_narrowklass() && t->isa_narrowklass()) {
1010 const Type* result = make_ptr()->meet_helper(t->make_ptr(), include_speculative);
1011 return result->make_narrowklass();
1012 }
1013
1014 #ifdef ASSERT
1015 Compile* C = Compile::current();
1016 VerifyMeet verify(C);
1017 #endif
1018
1019 const Type *this_t = maybe_remove_speculative(include_speculative);
1020 t = t->maybe_remove_speculative(include_speculative);
1021
1022 const Type *mt = this_t->xmeet(t);
1023 #ifdef ASSERT
1024 verify.add(this_t, t, mt);
1025 if (isa_narrowoop() || t->isa_narrowoop()) {
1026 return mt;
1027 }
1028 if (isa_narrowklass() || t->isa_narrowklass()) {
1029 return mt;
1030 }
1031 this_t->check_symmetrical(t, mt, verify);
1032 const Type *mt_dual = verify.meet(this_t->_dual, t->_dual);
1033 this_t->_dual->check_symmetrical(t->_dual, mt_dual, verify);
1034 #endif
1035 return mt;
1036 }
1037
1038 //------------------------------xmeet------------------------------------------
1039 // Compute the MEET of two types. It returns a new Type object.
1040 const Type *Type::xmeet( const Type *t ) const {
1041 // Perform a fast test for common case; meeting the same types together.
1042 if( this == t ) return this; // Meeting same type-rep?
1043
1044 // Meeting TOP with anything?
1045 if( _base == Top ) return t;
1046
1047 // Meeting BOTTOM with anything?
1048 if( _base == Bottom ) return BOTTOM;
1049
1050 // Current "this->_base" is one of: Bad, Multi, Control, Top,
1051 // Abio, Abstore, Floatxxx, Doublexxx, Bottom, lastype.
1052 switch (t->base()) { // Switch on original type
1053
1054 // Cut in half the number of cases I must handle. Only need cases for when
1055 // the given enum "t->type" is less than or equal to the local enum "type".
1056 case HalfFloatCon:
1057 case FloatCon:
1058 case DoubleCon:
1059 case Int:
1060 case Long:
1061 return t->xmeet(this);
1062
1063 case OopPtr:
1064 return t->xmeet(this);
1065
1066 case InstPtr:
1067 return t->xmeet(this);
1068
1069 case MetadataPtr:
1070 case KlassPtr:
1071 case InstKlassPtr:
1072 case AryKlassPtr:
1073 return t->xmeet(this);
1074
1075 case AryPtr:
1076 return t->xmeet(this);
1077
1078 case NarrowOop:
1079 return t->xmeet(this);
1080
1081 case NarrowKlass:
1082 return t->xmeet(this);
1083
1084 case Bad: // Type check
1085 default: // Bogus type not in lattice
1086 typerr(t);
1087 return Type::BOTTOM;
1088
1089 case Bottom: // Ye Olde Default
1090 return t;
1091
1092 case HalfFloatTop:
1093 if (_base == HalfFloatTop) { return this; }
1094 case HalfFloatBot: // Half Float
1095 if (_base == HalfFloatBot || _base == HalfFloatTop) { return HALF_FLOAT; }
1096 if (_base == FloatBot || _base == FloatTop) { return Type::BOTTOM; }
1097 if (_base == DoubleTop || _base == DoubleBot) { return Type::BOTTOM; }
1098 typerr(t);
1099 return Type::BOTTOM;
1100
1101 case FloatTop:
1102 if (_base == FloatTop ) { return this; }
1103 case FloatBot: // Float
1104 if (_base == FloatBot || _base == FloatTop) { return FLOAT; }
1105 if (_base == HalfFloatTop || _base == HalfFloatBot) { return Type::BOTTOM; }
1106 if (_base == DoubleTop || _base == DoubleBot) { return Type::BOTTOM; }
1107 typerr(t);
1108 return Type::BOTTOM;
1109
1110 case DoubleTop:
1111 if (_base == DoubleTop) { return this; }
1112 case DoubleBot: // Double
1113 if (_base == DoubleBot || _base == DoubleTop) { return DOUBLE; }
1114 if (_base == HalfFloatTop || _base == HalfFloatBot) { return Type::BOTTOM; }
1115 if (_base == FloatTop || _base == FloatBot) { return Type::BOTTOM; }
1116 typerr(t);
1117 return Type::BOTTOM;
1118
1119 // These next few cases must match exactly or it is a compile-time error.
1120 case Control: // Control of code
1121 case Abio: // State of world outside of program
1122 case Memory:
1123 if (_base == t->_base) { return this; }
1124 typerr(t);
1125 return Type::BOTTOM;
1126
1127 case Top: // Top of the lattice
1128 return this;
1129 }
1130
1131 // The type is unchanged
1132 return this;
1133 }
1134
1135 //-----------------------------filter------------------------------------------
1136 const Type *Type::filter_helper(const Type *kills, bool include_speculative) const {
1137 const Type* ft = join_helper(kills, include_speculative);
1138 if (ft->empty())
1139 return Type::TOP; // Canonical empty value
1140 return ft;
1141 }
1142
1143 //------------------------------xdual------------------------------------------
1144 const Type *Type::xdual() const {
1145 // Note: the base() accessor asserts the sanity of _base.
1146 assert(_type_info[base()].dual_type != Bad, "implement with v-call");
1147 return new Type(_type_info[_base].dual_type);
1148 }
1149
1150 //------------------------------has_memory-------------------------------------
1151 bool Type::has_memory() const {
1152 Type::TYPES tx = base();
1153 if (tx == Memory) return true;
1154 if (tx == Tuple) {
1155 const TypeTuple *t = is_tuple();
1156 for (uint i=0; i < t->cnt(); i++) {
1157 tx = t->field_at(i)->base();
1158 if (tx == Memory) return true;
1159 }
1160 }
1161 return false;
1162 }
1163
1164 #ifndef PRODUCT
1165 //------------------------------dump2------------------------------------------
1166 void Type::dump2( Dict &d, uint depth, outputStream *st ) const {
1167 st->print("%s", _type_info[_base].msg);
1168 }
1169
1170 //------------------------------dump-------------------------------------------
1171 void Type::dump_on(outputStream *st) const {
1172 ResourceMark rm;
1173 Dict d(cmpkey,hashkey); // Stop recursive type dumping
1174 dump2(d,1, st);
1175 if (is_ptr_to_narrowoop()) {
1176 st->print(" [narrow]");
1177 } else if (is_ptr_to_narrowklass()) {
1178 st->print(" [narrowklass]");
1179 }
1180 }
1181
1182 //-----------------------------------------------------------------------------
1183 const char* Type::str(const Type* t) {
1184 stringStream ss;
1185 t->dump_on(&ss);
1186 return ss.as_string();
1187 }
1188 #endif
1189
1190 //------------------------------singleton--------------------------------------
1191 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
1192 // constants (Ldi nodes). Singletons are integer, float or double constants.
1193 bool Type::singleton(void) const {
1194 return _base == Top || _base == Half;
1195 }
1196
1197 //------------------------------empty------------------------------------------
1198 // TRUE if Type is a type with no values, FALSE otherwise.
1199 bool Type::empty(void) const {
1200 switch (_base) {
1201 case DoubleTop:
1202 case FloatTop:
1203 case HalfFloatTop:
1204 case Top:
1205 return true;
1206
1207 case Half:
1208 case Abio:
1209 case Return_Address:
1210 case Memory:
1211 case Bottom:
1212 case HalfFloatBot:
1213 case FloatBot:
1214 case DoubleBot:
1215 return false; // never a singleton, therefore never empty
1216
1217 default:
1218 ShouldNotReachHere();
1219 return false;
1220 }
1221 }
1222
1223 //------------------------------dump_stats-------------------------------------
1224 // Dump collected statistics to stderr
1225 #ifndef PRODUCT
1226 void Type::dump_stats() {
1227 tty->print("Types made: %d\n", type_dict()->Size());
1228 }
1229 #endif
1230
1231 //------------------------------category---------------------------------------
1232 #ifndef PRODUCT
1233 Type::Category Type::category() const {
1234 const TypeTuple* tuple;
1235 switch (base()) {
1236 case Type::Int:
1237 case Type::Long:
1238 case Type::Half:
1239 case Type::NarrowOop:
1240 case Type::NarrowKlass:
1241 case Type::Array:
1242 case Type::VectorA:
1243 case Type::VectorS:
1244 case Type::VectorD:
1245 case Type::VectorX:
1246 case Type::VectorY:
1247 case Type::VectorZ:
1248 case Type::VectorMask:
1249 case Type::AnyPtr:
1250 case Type::RawPtr:
1251 case Type::OopPtr:
1252 case Type::InstPtr:
1253 case Type::AryPtr:
1254 case Type::MetadataPtr:
1255 case Type::KlassPtr:
1256 case Type::InstKlassPtr:
1257 case Type::AryKlassPtr:
1258 case Type::Function:
1259 case Type::Return_Address:
1260 case Type::HalfFloatTop:
1261 case Type::HalfFloatCon:
1262 case Type::HalfFloatBot:
1263 case Type::FloatTop:
1264 case Type::FloatCon:
1265 case Type::FloatBot:
1266 case Type::DoubleTop:
1267 case Type::DoubleCon:
1268 case Type::DoubleBot:
1269 return Category::Data;
1270 case Type::Memory:
1271 return Category::Memory;
1272 case Type::Control:
1273 return Category::Control;
1274 case Type::Top:
1275 case Type::Abio:
1276 case Type::Bottom:
1277 return Category::Other;
1278 case Type::Bad:
1279 case Type::lastype:
1280 return Category::Undef;
1281 case Type::Tuple:
1282 // Recursive case. Return CatMixed if the tuple contains types of
1283 // different categories (e.g. CallStaticJavaNode's type), or the specific
1284 // category if all types are of the same category (e.g. IfNode's type).
1285 tuple = is_tuple();
1286 if (tuple->cnt() == 0) {
1287 return Category::Undef;
1288 } else {
1289 Category first = tuple->field_at(0)->category();
1290 for (uint i = 1; i < tuple->cnt(); i++) {
1291 if (tuple->field_at(i)->category() != first) {
1292 return Category::Mixed;
1293 }
1294 }
1295 return first;
1296 }
1297 default:
1298 assert(false, "unmatched base type: all base types must be categorized");
1299 }
1300 return Category::Undef;
1301 }
1302
1303 bool Type::has_category(Type::Category cat) const {
1304 if (category() == cat) {
1305 return true;
1306 }
1307 if (category() == Category::Mixed) {
1308 const TypeTuple* tuple = is_tuple();
1309 for (uint i = 0; i < tuple->cnt(); i++) {
1310 if (tuple->field_at(i)->has_category(cat)) {
1311 return true;
1312 }
1313 }
1314 }
1315 return false;
1316 }
1317 #endif
1318
1319 //------------------------------typerr-----------------------------------------
1320 void Type::typerr( const Type *t ) const {
1321 #ifndef PRODUCT
1322 tty->print("\nError mixing types: ");
1323 dump();
1324 tty->print(" and ");
1325 t->dump();
1326 tty->print("\n");
1327 #endif
1328 ShouldNotReachHere();
1329 }
1330
1331
1332 //=============================================================================
1333 // Convenience common pre-built types.
1334 const TypeF *TypeF::MAX; // Floating point max
1335 const TypeF *TypeF::MIN; // Floating point min
1336 const TypeF *TypeF::ZERO; // Floating point zero
1337 const TypeF *TypeF::ONE; // Floating point one
1338 const TypeF *TypeF::POS_INF; // Floating point positive infinity
1339 const TypeF *TypeF::NEG_INF; // Floating point negative infinity
1340
1341 //------------------------------make-------------------------------------------
1342 // Create a float constant
1343 const TypeF *TypeF::make(float f) {
1344 return (TypeF*)(new TypeF(f))->hashcons();
1345 }
1346
1347 //------------------------------meet-------------------------------------------
1348 // Compute the MEET of two types. It returns a new Type object.
1349 const Type *TypeF::xmeet( const Type *t ) const {
1350 // Perform a fast test for common case; meeting the same types together.
1351 if( this == t ) return this; // Meeting same type-rep?
1352
1353 // Current "this->_base" is FloatCon
1354 switch (t->base()) { // Switch on original type
1355 case AnyPtr: // Mixing with oops happens when javac
1356 case RawPtr: // reuses local variables
1357 case OopPtr:
1358 case InstPtr:
1359 case AryPtr:
1360 case MetadataPtr:
1361 case KlassPtr:
1362 case InstKlassPtr:
1363 case AryKlassPtr:
1364 case NarrowOop:
1365 case NarrowKlass:
1366 case Int:
1367 case Long:
1368 case HalfFloatTop:
1369 case HalfFloatCon:
1370 case HalfFloatBot:
1371 case DoubleTop:
1372 case DoubleCon:
1373 case DoubleBot:
1374 case Bottom: // Ye Olde Default
1375 return Type::BOTTOM;
1376
1377 case FloatBot:
1378 return t;
1379
1380 default: // All else is a mistake
1381 typerr(t);
1382
1383 case FloatCon: // Float-constant vs Float-constant?
1384 if( jint_cast(_f) != jint_cast(t->getf()) ) // unequal constants?
1385 // must compare bitwise as positive zero, negative zero and NaN have
1386 // all the same representation in C++
1387 return FLOAT; // Return generic float
1388 // Equal constants
1389 case Top:
1390 case FloatTop:
1391 break; // Return the float constant
1392 }
1393 return this; // Return the float constant
1394 }
1395
1396 //------------------------------xdual------------------------------------------
1397 // Dual: symmetric
1398 const Type *TypeF::xdual() const {
1399 return this;
1400 }
1401
1402 //------------------------------eq---------------------------------------------
1403 // Structural equality check for Type representations
1404 bool TypeF::eq(const Type *t) const {
1405 // Bitwise comparison to distinguish between +/-0. These values must be treated
1406 // as different to be consistent with C1 and the interpreter.
1407 return (jint_cast(_f) == jint_cast(t->getf()));
1408 }
1409
1410 //------------------------------hash-------------------------------------------
1411 // Type-specific hashing function.
1412 uint TypeF::hash(void) const {
1413 return *(uint*)(&_f);
1414 }
1415
1416 //------------------------------is_finite--------------------------------------
1417 // Has a finite value
1418 bool TypeF::is_finite() const {
1419 return g_isfinite(getf()) != 0;
1420 }
1421
1422 //------------------------------is_nan-----------------------------------------
1423 // Is not a number (NaN)
1424 bool TypeF::is_nan() const {
1425 return g_isnan(getf()) != 0;
1426 }
1427
1428 //------------------------------dump2------------------------------------------
1429 // Dump float constant Type
1430 #ifndef PRODUCT
1431 void TypeF::dump2( Dict &d, uint depth, outputStream *st ) const {
1432 Type::dump2(d,depth, st);
1433 st->print("%f", _f);
1434 }
1435 #endif
1436
1437 //------------------------------singleton--------------------------------------
1438 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
1439 // constants (Ldi nodes). Singletons are integer, float or double constants
1440 // or a single symbol.
1441 bool TypeF::singleton(void) const {
1442 return true; // Always a singleton
1443 }
1444
1445 bool TypeF::empty(void) const {
1446 return false; // always exactly a singleton
1447 }
1448
1449 //=============================================================================
1450 // Convenience common pre-built types.
1451 const TypeH* TypeH::MAX; // Half float max
1452 const TypeH* TypeH::MIN; // Half float min
1453 const TypeH* TypeH::ZERO; // Half float zero
1454 const TypeH* TypeH::ONE; // Half float one
1455 const TypeH* TypeH::POS_INF; // Half float positive infinity
1456 const TypeH* TypeH::NEG_INF; // Half float negative infinity
1457
1458 //------------------------------make-------------------------------------------
1459 // Create a halffloat constant
1460 const TypeH* TypeH::make(short f) {
1461 return (TypeH*)(new TypeH(f))->hashcons();
1462 }
1463
1464 const TypeH* TypeH::make(float f) {
1465 assert(StubRoutines::f2hf_adr() != nullptr, "");
1466 short hf = StubRoutines::f2hf(f);
1467 return (TypeH*)(new TypeH(hf))->hashcons();
1468 }
1469
1470 //------------------------------xmeet-------------------------------------------
1471 // Compute the MEET of two types. It returns a new Type object.
1472 const Type* TypeH::xmeet(const Type* t) const {
1473 // Perform a fast test for common case; meeting the same types together.
1474 if (this == t) return this; // Meeting same type-rep?
1475
1476 // Current "this->_base" is FloatCon
1477 switch (t->base()) { // Switch on original type
1478 case AnyPtr: // Mixing with oops happens when javac
1479 case RawPtr: // reuses local variables
1480 case OopPtr:
1481 case InstPtr:
1482 case AryPtr:
1483 case MetadataPtr:
1484 case KlassPtr:
1485 case InstKlassPtr:
1486 case AryKlassPtr:
1487 case NarrowOop:
1488 case NarrowKlass:
1489 case Int:
1490 case Long:
1491 case FloatTop:
1492 case FloatCon:
1493 case FloatBot:
1494 case DoubleTop:
1495 case DoubleCon:
1496 case DoubleBot:
1497 case Bottom: // Ye Olde Default
1498 return Type::BOTTOM;
1499
1500 case HalfFloatBot:
1501 return t;
1502
1503 default: // All else is a mistake
1504 typerr(t);
1505
1506 case HalfFloatCon: // Half float-constant vs Half float-constant?
1507 if (_f != t->geth()) { // unequal constants?
1508 // must compare bitwise as positive zero, negative zero and NaN have
1509 // all the same representation in C++
1510 return HALF_FLOAT; // Return generic float
1511 } // Equal constants
1512 case Top:
1513 case HalfFloatTop:
1514 break; // Return the Half float constant
1515 }
1516 return this; // Return the Half float constant
1517 }
1518
1519 //------------------------------xdual------------------------------------------
1520 // Dual: symmetric
1521 const Type* TypeH::xdual() const {
1522 return this;
1523 }
1524
1525 //------------------------------eq---------------------------------------------
1526 // Structural equality check for Type representations
1527 bool TypeH::eq(const Type* t) const {
1528 // Bitwise comparison to distinguish between +/-0. These values must be treated
1529 // as different to be consistent with C1 and the interpreter.
1530 return (_f == t->geth());
1531 }
1532
1533 //------------------------------hash-------------------------------------------
1534 // Type-specific hashing function.
1535 uint TypeH::hash(void) const {
1536 return *(jshort*)(&_f);
1537 }
1538
1539 //------------------------------is_finite--------------------------------------
1540 // Has a finite value
1541 bool TypeH::is_finite() const {
1542 assert(StubRoutines::hf2f_adr() != nullptr, "");
1543 float f = StubRoutines::hf2f(geth());
1544 return g_isfinite(f) != 0;
1545 }
1546
1547 float TypeH::getf() const {
1548 assert(StubRoutines::hf2f_adr() != nullptr, "");
1549 return StubRoutines::hf2f(geth());
1550 }
1551
1552 //------------------------------is_nan-----------------------------------------
1553 // Is not a number (NaN)
1554 bool TypeH::is_nan() const {
1555 assert(StubRoutines::hf2f_adr() != nullptr, "");
1556 float f = StubRoutines::hf2f(geth());
1557 return g_isnan(f) != 0;
1558 }
1559
1560 //------------------------------dump2------------------------------------------
1561 // Dump float constant Type
1562 #ifndef PRODUCT
1563 void TypeH::dump2(Dict &d, uint depth, outputStream* st) const {
1564 Type::dump2(d,depth, st);
1565 st->print("%f", getf());
1566 }
1567 #endif
1568
1569 //------------------------------singleton--------------------------------------
1570 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
1571 // constants (Ldi nodes). Singletons are integer, half float, float or double constants
1572 // or a single symbol.
1573 bool TypeH::singleton(void) const {
1574 return true; // Always a singleton
1575 }
1576
1577 bool TypeH::empty(void) const {
1578 return false; // always exactly a singleton
1579 }
1580
1581 //=============================================================================
1582 // Convenience common pre-built types.
1583 const TypeD *TypeD::MAX; // Floating point max
1584 const TypeD *TypeD::MIN; // Floating point min
1585 const TypeD *TypeD::ZERO; // Floating point zero
1586 const TypeD *TypeD::ONE; // Floating point one
1587 const TypeD *TypeD::POS_INF; // Floating point positive infinity
1588 const TypeD *TypeD::NEG_INF; // Floating point negative infinity
1589
1590 //------------------------------make-------------------------------------------
1591 const TypeD *TypeD::make(double d) {
1592 return (TypeD*)(new TypeD(d))->hashcons();
1593 }
1594
1595 //------------------------------meet-------------------------------------------
1596 // Compute the MEET of two types. It returns a new Type object.
1597 const Type *TypeD::xmeet( const Type *t ) const {
1598 // Perform a fast test for common case; meeting the same types together.
1599 if( this == t ) return this; // Meeting same type-rep?
1600
1601 // Current "this->_base" is DoubleCon
1602 switch (t->base()) { // Switch on original type
1603 case AnyPtr: // Mixing with oops happens when javac
1604 case RawPtr: // reuses local variables
1605 case OopPtr:
1606 case InstPtr:
1607 case AryPtr:
1608 case MetadataPtr:
1609 case KlassPtr:
1610 case InstKlassPtr:
1611 case AryKlassPtr:
1612 case NarrowOop:
1613 case NarrowKlass:
1614 case Int:
1615 case Long:
1616 case HalfFloatTop:
1617 case HalfFloatCon:
1618 case HalfFloatBot:
1619 case FloatTop:
1620 case FloatCon:
1621 case FloatBot:
1622 case Bottom: // Ye Olde Default
1623 return Type::BOTTOM;
1624
1625 case DoubleBot:
1626 return t;
1627
1628 default: // All else is a mistake
1629 typerr(t);
1630
1631 case DoubleCon: // Double-constant vs Double-constant?
1632 if( jlong_cast(_d) != jlong_cast(t->getd()) ) // unequal constants? (see comment in TypeF::xmeet)
1633 return DOUBLE; // Return generic double
1634 case Top:
1635 case DoubleTop:
1636 break;
1637 }
1638 return this; // Return the double constant
1639 }
1640
1641 //------------------------------xdual------------------------------------------
1642 // Dual: symmetric
1643 const Type *TypeD::xdual() const {
1644 return this;
1645 }
1646
1647 //------------------------------eq---------------------------------------------
1648 // Structural equality check for Type representations
1649 bool TypeD::eq(const Type *t) const {
1650 // Bitwise comparison to distinguish between +/-0. These values must be treated
1651 // as different to be consistent with C1 and the interpreter.
1652 return (jlong_cast(_d) == jlong_cast(t->getd()));
1653 }
1654
1655 //------------------------------hash-------------------------------------------
1656 // Type-specific hashing function.
1657 uint TypeD::hash(void) const {
1658 return *(uint*)(&_d);
1659 }
1660
1661 //------------------------------is_finite--------------------------------------
1662 // Has a finite value
1663 bool TypeD::is_finite() const {
1664 return g_isfinite(getd()) != 0;
1665 }
1666
1667 //------------------------------is_nan-----------------------------------------
1668 // Is not a number (NaN)
1669 bool TypeD::is_nan() const {
1670 return g_isnan(getd()) != 0;
1671 }
1672
1673 //------------------------------dump2------------------------------------------
1674 // Dump double constant Type
1675 #ifndef PRODUCT
1676 void TypeD::dump2( Dict &d, uint depth, outputStream *st ) const {
1677 Type::dump2(d,depth,st);
1678 st->print("%f", _d);
1679 }
1680 #endif
1681
1682 //------------------------------singleton--------------------------------------
1683 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
1684 // constants (Ldi nodes). Singletons are integer, float or double constants
1685 // or a single symbol.
1686 bool TypeD::singleton(void) const {
1687 return true; // Always a singleton
1688 }
1689
1690 bool TypeD::empty(void) const {
1691 return false; // always exactly a singleton
1692 }
1693
1694 const TypeInteger* TypeInteger::make(jlong lo, jlong hi, int w, BasicType bt) {
1695 if (bt == T_INT) {
1696 return TypeInt::make(checked_cast<jint>(lo), checked_cast<jint>(hi), w);
1697 }
1698 assert(bt == T_LONG, "basic type not an int or long");
1699 return TypeLong::make(lo, hi, w);
1700 }
1701
1702 const TypeInteger* TypeInteger::make(jlong con, BasicType bt) {
1703 return make(con, con, WidenMin, bt);
1704 }
1705
1706 jlong TypeInteger::get_con_as_long(BasicType bt) const {
1707 if (bt == T_INT) {
1708 return is_int()->get_con();
1709 }
1710 assert(bt == T_LONG, "basic type not an int or long");
1711 return is_long()->get_con();
1712 }
1713
1714 const TypeInteger* TypeInteger::bottom(BasicType bt) {
1715 if (bt == T_INT) {
1716 return TypeInt::INT;
1717 }
1718 assert(bt == T_LONG, "basic type not an int or long");
1719 return TypeLong::LONG;
1720 }
1721
1722 const TypeInteger* TypeInteger::zero(BasicType bt) {
1723 if (bt == T_INT) {
1724 return TypeInt::ZERO;
1725 }
1726 assert(bt == T_LONG, "basic type not an int or long");
1727 return TypeLong::ZERO;
1728 }
1729
1730 const TypeInteger* TypeInteger::one(BasicType bt) {
1731 if (bt == T_INT) {
1732 return TypeInt::ONE;
1733 }
1734 assert(bt == T_LONG, "basic type not an int or long");
1735 return TypeLong::ONE;
1736 }
1737
1738 const TypeInteger* TypeInteger::minus_1(BasicType bt) {
1739 if (bt == T_INT) {
1740 return TypeInt::MINUS_1;
1741 }
1742 assert(bt == T_LONG, "basic type not an int or long");
1743 return TypeLong::MINUS_1;
1744 }
1745
1746 //=============================================================================
1747 // Convenience common pre-built types.
1748 const TypeInt *TypeInt::MAX; // INT_MAX
1749 const TypeInt *TypeInt::MIN; // INT_MIN
1750 const TypeInt *TypeInt::MINUS_1;// -1
1751 const TypeInt *TypeInt::ZERO; // 0
1752 const TypeInt *TypeInt::ONE; // 1
1753 const TypeInt *TypeInt::BOOL; // 0 or 1, FALSE or TRUE.
1754 const TypeInt *TypeInt::CC; // -1,0 or 1, condition codes
1755 const TypeInt *TypeInt::CC_LT; // [-1] == MINUS_1
1756 const TypeInt *TypeInt::CC_GT; // [1] == ONE
1757 const TypeInt *TypeInt::CC_EQ; // [0] == ZERO
1758 const TypeInt *TypeInt::CC_LE; // [-1,0]
1759 const TypeInt *TypeInt::CC_GE; // [0,1] == BOOL (!)
1760 const TypeInt *TypeInt::BYTE; // Bytes, -128 to 127
1761 const TypeInt *TypeInt::UBYTE; // Unsigned Bytes, 0 to 255
1762 const TypeInt *TypeInt::CHAR; // Java chars, 0-65535
1763 const TypeInt *TypeInt::SHORT; // Java shorts, -32768-32767
1764 const TypeInt *TypeInt::POS; // Positive 32-bit integers or zero
1765 const TypeInt *TypeInt::POS1; // Positive 32-bit integers
1766 const TypeInt *TypeInt::INT; // 32-bit integers
1767 const TypeInt *TypeInt::SYMINT; // symmetric range [-max_jint..max_jint]
1768 const TypeInt *TypeInt::TYPE_DOMAIN; // alias for TypeInt::INT
1769
1770 //------------------------------TypeInt----------------------------------------
1771 TypeInt::TypeInt( jint lo, jint hi, int w ) : TypeInteger(Int, w), _lo(lo), _hi(hi) {
1772 }
1773
1774 //------------------------------make-------------------------------------------
1775 const TypeInt *TypeInt::make( jint lo ) {
1776 return (TypeInt*)(new TypeInt(lo,lo,WidenMin))->hashcons();
1777 }
1778
1779 static int normalize_int_widen( jint lo, jint hi, int w ) {
1780 // Certain normalizations keep us sane when comparing types.
1781 // The 'SMALLINT' covers constants and also CC and its relatives.
1782 if (lo <= hi) {
1783 if (((juint)hi - lo) <= SMALLINT) w = Type::WidenMin;
1784 if (((juint)hi - lo) >= max_juint) w = Type::WidenMax; // TypeInt::INT
1785 } else {
1786 if (((juint)lo - hi) <= SMALLINT) w = Type::WidenMin;
1787 if (((juint)lo - hi) >= max_juint) w = Type::WidenMin; // dual TypeInt::INT
1788 }
1789 return w;
1790 }
1791
1792 const TypeInt *TypeInt::make( jint lo, jint hi, int w ) {
1793 w = normalize_int_widen(lo, hi, w);
1794 return (TypeInt*)(new TypeInt(lo,hi,w))->hashcons();
1795 }
1796
1797 //------------------------------meet-------------------------------------------
1798 // Compute the MEET of two types. It returns a new Type representation object
1799 // with reference count equal to the number of Types pointing at it.
1800 // Caller should wrap a Types around it.
1801 const Type *TypeInt::xmeet( const Type *t ) const {
1802 // Perform a fast test for common case; meeting the same types together.
1803 if( this == t ) return this; // Meeting same type?
1804
1805 // Currently "this->_base" is a TypeInt
1806 switch (t->base()) { // Switch on original type
1807 case AnyPtr: // Mixing with oops happens when javac
1808 case RawPtr: // reuses local variables
1809 case OopPtr:
1810 case InstPtr:
1811 case AryPtr:
1812 case MetadataPtr:
1813 case KlassPtr:
1814 case InstKlassPtr:
1815 case AryKlassPtr:
1816 case NarrowOop:
1817 case NarrowKlass:
1818 case Long:
1819 case HalfFloatTop:
1820 case HalfFloatCon:
1821 case HalfFloatBot:
1822 case FloatTop:
1823 case FloatCon:
1824 case FloatBot:
1825 case DoubleTop:
1826 case DoubleCon:
1827 case DoubleBot:
1828 case Bottom: // Ye Olde Default
1829 return Type::BOTTOM;
1830 default: // All else is a mistake
1831 typerr(t);
1832 case Top: // No change
1833 return this;
1834 case Int: // Int vs Int?
1835 break;
1836 }
1837
1838 // Expand covered set
1839 const TypeInt *r = t->is_int();
1840 return make( MIN2(_lo,r->_lo), MAX2(_hi,r->_hi), MAX2(_widen,r->_widen) );
1841 }
1842
1843 //------------------------------xdual------------------------------------------
1844 // Dual: reverse hi & lo; flip widen
1845 const Type *TypeInt::xdual() const {
1846 int w = normalize_int_widen(_hi,_lo, WidenMax-_widen);
1847 return new TypeInt(_hi,_lo,w);
1848 }
1849
1850 //------------------------------widen------------------------------------------
1851 // Only happens for optimistic top-down optimizations.
1852 const Type *TypeInt::widen( const Type *old, const Type* limit ) const {
1853 // Coming from TOP or such; no widening
1854 if( old->base() != Int ) return this;
1855 const TypeInt *ot = old->is_int();
1856
1857 // If new guy is equal to old guy, no widening
1858 if( _lo == ot->_lo && _hi == ot->_hi )
1859 return old;
1860
1861 // If new guy contains old, then we widened
1862 if( _lo <= ot->_lo && _hi >= ot->_hi ) {
1863 // New contains old
1864 // If new guy is already wider than old, no widening
1865 if( _widen > ot->_widen ) return this;
1866 // If old guy was a constant, do not bother
1867 if (ot->_lo == ot->_hi) return this;
1868 // Now widen new guy.
1869 // Check for widening too far
1870 if (_widen == WidenMax) {
1871 int max = max_jint;
1872 int min = min_jint;
1873 if (limit->isa_int()) {
1874 max = limit->is_int()->_hi;
1875 min = limit->is_int()->_lo;
1876 }
1877 if (min < _lo && _hi < max) {
1878 // If neither endpoint is extremal yet, push out the endpoint
1879 // which is closer to its respective limit.
1880 if (_lo >= 0 || // easy common case
1881 ((juint)_lo - min) >= ((juint)max - _hi)) {
1882 // Try to widen to an unsigned range type of 31 bits:
1883 return make(_lo, max, WidenMax);
1884 } else {
1885 return make(min, _hi, WidenMax);
1886 }
1887 }
1888 return TypeInt::INT;
1889 }
1890 // Returned widened new guy
1891 return make(_lo,_hi,_widen+1);
1892 }
1893
1894 // If old guy contains new, then we probably widened too far & dropped to
1895 // bottom. Return the wider fellow.
1896 if ( ot->_lo <= _lo && ot->_hi >= _hi )
1897 return old;
1898
1899 //fatal("Integer value range is not subset");
1900 //return this;
1901 return TypeInt::INT;
1902 }
1903
1904 //------------------------------narrow---------------------------------------
1905 // Only happens for pessimistic optimizations.
1906 const Type *TypeInt::narrow( const Type *old ) const {
1907 if (_lo >= _hi) return this; // already narrow enough
1908 if (old == nullptr) return this;
1909 const TypeInt* ot = old->isa_int();
1910 if (ot == nullptr) return this;
1911 jint olo = ot->_lo;
1912 jint ohi = ot->_hi;
1913
1914 // If new guy is equal to old guy, no narrowing
1915 if (_lo == olo && _hi == ohi) return old;
1916
1917 // If old guy was maximum range, allow the narrowing
1918 if (olo == min_jint && ohi == max_jint) return this;
1919
1920 if (_lo < olo || _hi > ohi)
1921 return this; // doesn't narrow; pretty weird
1922
1923 // The new type narrows the old type, so look for a "death march".
1924 // See comments on PhaseTransform::saturate.
1925 juint nrange = (juint)_hi - _lo;
1926 juint orange = (juint)ohi - olo;
1927 if (nrange < max_juint - 1 && nrange > (orange >> 1) + (SMALLINT*2)) {
1928 // Use the new type only if the range shrinks a lot.
1929 // We do not want the optimizer computing 2^31 point by point.
1930 return old;
1931 }
1932
1933 return this;
1934 }
1935
1936 //-----------------------------filter------------------------------------------
1937 const Type *TypeInt::filter_helper(const Type *kills, bool include_speculative) const {
1938 const TypeInt* ft = join_helper(kills, include_speculative)->isa_int();
1939 if (ft == nullptr || ft->empty())
1940 return Type::TOP; // Canonical empty value
1941 if (ft->_widen < this->_widen) {
1942 // Do not allow the value of kill->_widen to affect the outcome.
1943 // The widen bits must be allowed to run freely through the graph.
1944 ft = TypeInt::make(ft->_lo, ft->_hi, this->_widen);
1945 }
1946 return ft;
1947 }
1948
1949 //------------------------------eq---------------------------------------------
1950 // Structural equality check for Type representations
1951 bool TypeInt::eq( const Type *t ) const {
1952 const TypeInt *r = t->is_int(); // Handy access
1953 return r->_lo == _lo && r->_hi == _hi && r->_widen == _widen;
1954 }
1955
1956 //------------------------------hash-------------------------------------------
1957 // Type-specific hashing function.
1958 uint TypeInt::hash(void) const {
1959 return (uint)_lo + (uint)_hi + (uint)_widen + (uint)Type::Int;
1960 }
1961
1962 //------------------------------is_finite--------------------------------------
1963 // Has a finite value
1964 bool TypeInt::is_finite() const {
1965 return true;
1966 }
1967
1968 //------------------------------dump2------------------------------------------
1969 // Dump TypeInt
1970 #ifndef PRODUCT
1971 static const char* intname(char* buf, size_t buf_size, jint n) {
1972 if (n == min_jint)
1973 return "min";
1974 else if (n < min_jint + 10000)
1975 os::snprintf_checked(buf, buf_size, "min+" INT32_FORMAT, n - min_jint);
1976 else if (n == max_jint)
1977 return "max";
1978 else if (n > max_jint - 10000)
1979 os::snprintf_checked(buf, buf_size, "max-" INT32_FORMAT, max_jint - n);
1980 else
1981 os::snprintf_checked(buf, buf_size, INT32_FORMAT, n);
1982 return buf;
1983 }
1984
1985 void TypeInt::dump2( Dict &d, uint depth, outputStream *st ) const {
1986 char buf[40], buf2[40];
1987 if (_lo == min_jint && _hi == max_jint)
1988 st->print("int");
1989 else if (is_con())
1990 st->print("int:%s", intname(buf, sizeof(buf), get_con()));
1991 else if (_lo == BOOL->_lo && _hi == BOOL->_hi)
1992 st->print("bool");
1993 else if (_lo == BYTE->_lo && _hi == BYTE->_hi)
1994 st->print("byte");
1995 else if (_lo == CHAR->_lo && _hi == CHAR->_hi)
1996 st->print("char");
1997 else if (_lo == SHORT->_lo && _hi == SHORT->_hi)
1998 st->print("short");
1999 else if (_hi == max_jint)
2000 st->print("int:>=%s", intname(buf, sizeof(buf), _lo));
2001 else if (_lo == min_jint)
2002 st->print("int:<=%s", intname(buf, sizeof(buf), _hi));
2003 else
2004 st->print("int:%s..%s", intname(buf, sizeof(buf), _lo), intname(buf2, sizeof(buf2), _hi));
2005
2006 if (_widen != 0 && this != TypeInt::INT)
2007 st->print(":%.*s", _widen, "wwww");
2008 }
2009 #endif
2010
2011 //------------------------------singleton--------------------------------------
2012 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
2013 // constants.
2014 bool TypeInt::singleton(void) const {
2015 return _lo >= _hi;
2016 }
2017
2018 bool TypeInt::empty(void) const {
2019 return _lo > _hi;
2020 }
2021
2022 //=============================================================================
2023 // Convenience common pre-built types.
2024 const TypeLong *TypeLong::MAX;
2025 const TypeLong *TypeLong::MIN;
2026 const TypeLong *TypeLong::MINUS_1;// -1
2027 const TypeLong *TypeLong::ZERO; // 0
2028 const TypeLong *TypeLong::ONE; // 1
2029 const TypeLong *TypeLong::POS; // >=0
2030 const TypeLong *TypeLong::LONG; // 64-bit integers
2031 const TypeLong *TypeLong::INT; // 32-bit subrange
2032 const TypeLong *TypeLong::UINT; // 32-bit unsigned subrange
2033 const TypeLong *TypeLong::TYPE_DOMAIN; // alias for TypeLong::LONG
2034
2035 //------------------------------TypeLong---------------------------------------
2036 TypeLong::TypeLong(jlong lo, jlong hi, int w) : TypeInteger(Long, w), _lo(lo), _hi(hi) {
2037 }
2038
2039 //------------------------------make-------------------------------------------
2040 const TypeLong *TypeLong::make( jlong lo ) {
2041 return (TypeLong*)(new TypeLong(lo,lo,WidenMin))->hashcons();
2042 }
2043
2044 static int normalize_long_widen( jlong lo, jlong hi, int w ) {
2045 // Certain normalizations keep us sane when comparing types.
2046 // The 'SMALLINT' covers constants.
2047 if (lo <= hi) {
2048 if (((julong)hi - lo) <= SMALLINT) w = Type::WidenMin;
2049 if (((julong)hi - lo) >= max_julong) w = Type::WidenMax; // TypeLong::LONG
2050 } else {
2051 if (((julong)lo - hi) <= SMALLINT) w = Type::WidenMin;
2052 if (((julong)lo - hi) >= max_julong) w = Type::WidenMin; // dual TypeLong::LONG
2053 }
2054 return w;
2055 }
2056
2057 const TypeLong *TypeLong::make( jlong lo, jlong hi, int w ) {
2058 w = normalize_long_widen(lo, hi, w);
2059 return (TypeLong*)(new TypeLong(lo,hi,w))->hashcons();
2060 }
2061
2062
2063 //------------------------------meet-------------------------------------------
2064 // Compute the MEET of two types. It returns a new Type representation object
2065 // with reference count equal to the number of Types pointing at it.
2066 // Caller should wrap a Types around it.
2067 const Type *TypeLong::xmeet( const Type *t ) const {
2068 // Perform a fast test for common case; meeting the same types together.
2069 if( this == t ) return this; // Meeting same type?
2070
2071 // Currently "this->_base" is a TypeLong
2072 switch (t->base()) { // Switch on original type
2073 case AnyPtr: // Mixing with oops happens when javac
2074 case RawPtr: // reuses local variables
2075 case OopPtr:
2076 case InstPtr:
2077 case AryPtr:
2078 case MetadataPtr:
2079 case KlassPtr:
2080 case InstKlassPtr:
2081 case AryKlassPtr:
2082 case NarrowOop:
2083 case NarrowKlass:
2084 case Int:
2085 case HalfFloatTop:
2086 case HalfFloatCon:
2087 case HalfFloatBot:
2088 case FloatTop:
2089 case FloatCon:
2090 case FloatBot:
2091 case DoubleTop:
2092 case DoubleCon:
2093 case DoubleBot:
2094 case Bottom: // Ye Olde Default
2095 return Type::BOTTOM;
2096 default: // All else is a mistake
2097 typerr(t);
2098 case Top: // No change
2099 return this;
2100 case Long: // Long vs Long?
2101 break;
2102 }
2103
2104 // Expand covered set
2105 const TypeLong *r = t->is_long(); // Turn into a TypeLong
2106 return make( MIN2(_lo,r->_lo), MAX2(_hi,r->_hi), MAX2(_widen,r->_widen) );
2107 }
2108
2109 //------------------------------xdual------------------------------------------
2110 // Dual: reverse hi & lo; flip widen
2111 const Type *TypeLong::xdual() const {
2112 int w = normalize_long_widen(_hi,_lo, WidenMax-_widen);
2113 return new TypeLong(_hi,_lo,w);
2114 }
2115
2116 //------------------------------widen------------------------------------------
2117 // Only happens for optimistic top-down optimizations.
2118 const Type *TypeLong::widen( const Type *old, const Type* limit ) const {
2119 // Coming from TOP or such; no widening
2120 if( old->base() != Long ) return this;
2121 const TypeLong *ot = old->is_long();
2122
2123 // If new guy is equal to old guy, no widening
2124 if( _lo == ot->_lo && _hi == ot->_hi )
2125 return old;
2126
2127 // If new guy contains old, then we widened
2128 if( _lo <= ot->_lo && _hi >= ot->_hi ) {
2129 // New contains old
2130 // If new guy is already wider than old, no widening
2131 if( _widen > ot->_widen ) return this;
2132 // If old guy was a constant, do not bother
2133 if (ot->_lo == ot->_hi) return this;
2134 // Now widen new guy.
2135 // Check for widening too far
2136 if (_widen == WidenMax) {
2137 jlong max = max_jlong;
2138 jlong min = min_jlong;
2139 if (limit->isa_long()) {
2140 max = limit->is_long()->_hi;
2141 min = limit->is_long()->_lo;
2142 }
2143 if (min < _lo && _hi < max) {
2144 // If neither endpoint is extremal yet, push out the endpoint
2145 // which is closer to its respective limit.
2146 if (_lo >= 0 || // easy common case
2147 ((julong)_lo - min) >= ((julong)max - _hi)) {
2148 // Try to widen to an unsigned range type of 32/63 bits:
2149 if (max >= max_juint && _hi < max_juint)
2150 return make(_lo, max_juint, WidenMax);
2151 else
2152 return make(_lo, max, WidenMax);
2153 } else {
2154 return make(min, _hi, WidenMax);
2155 }
2156 }
2157 return TypeLong::LONG;
2158 }
2159 // Returned widened new guy
2160 return make(_lo,_hi,_widen+1);
2161 }
2162
2163 // If old guy contains new, then we probably widened too far & dropped to
2164 // bottom. Return the wider fellow.
2165 if ( ot->_lo <= _lo && ot->_hi >= _hi )
2166 return old;
2167
2168 // fatal("Long value range is not subset");
2169 // return this;
2170 return TypeLong::LONG;
2171 }
2172
2173 //------------------------------narrow----------------------------------------
2174 // Only happens for pessimistic optimizations.
2175 const Type *TypeLong::narrow( const Type *old ) const {
2176 if (_lo >= _hi) return this; // already narrow enough
2177 if (old == nullptr) return this;
2178 const TypeLong* ot = old->isa_long();
2179 if (ot == nullptr) return this;
2180 jlong olo = ot->_lo;
2181 jlong ohi = ot->_hi;
2182
2183 // If new guy is equal to old guy, no narrowing
2184 if (_lo == olo && _hi == ohi) return old;
2185
2186 // If old guy was maximum range, allow the narrowing
2187 if (olo == min_jlong && ohi == max_jlong) return this;
2188
2189 if (_lo < olo || _hi > ohi)
2190 return this; // doesn't narrow; pretty weird
2191
2192 // The new type narrows the old type, so look for a "death march".
2193 // See comments on PhaseTransform::saturate.
2194 julong nrange = (julong)_hi - _lo;
2195 julong orange = (julong)ohi - olo;
2196 if (nrange < max_julong - 1 && nrange > (orange >> 1) + (SMALLINT*2)) {
2197 // Use the new type only if the range shrinks a lot.
2198 // We do not want the optimizer computing 2^31 point by point.
2199 return old;
2200 }
2201
2202 return this;
2203 }
2204
2205 //-----------------------------filter------------------------------------------
2206 const Type *TypeLong::filter_helper(const Type *kills, bool include_speculative) const {
2207 const TypeLong* ft = join_helper(kills, include_speculative)->isa_long();
2208 if (ft == nullptr || ft->empty())
2209 return Type::TOP; // Canonical empty value
2210 if (ft->_widen < this->_widen) {
2211 // Do not allow the value of kill->_widen to affect the outcome.
2212 // The widen bits must be allowed to run freely through the graph.
2213 ft = TypeLong::make(ft->_lo, ft->_hi, this->_widen);
2214 }
2215 return ft;
2216 }
2217
2218 //------------------------------eq---------------------------------------------
2219 // Structural equality check for Type representations
2220 bool TypeLong::eq( const Type *t ) const {
2221 const TypeLong *r = t->is_long(); // Handy access
2222 return r->_lo == _lo && r->_hi == _hi && r->_widen == _widen;
2223 }
2224
2225 //------------------------------hash-------------------------------------------
2226 // Type-specific hashing function.
2227 uint TypeLong::hash(void) const {
2228 return (uint)_lo + (uint)_hi + (uint)_widen + (uint)Type::Long;
2229 }
2230
2231 //------------------------------is_finite--------------------------------------
2232 // Has a finite value
2233 bool TypeLong::is_finite() const {
2234 return true;
2235 }
2236
2237 //------------------------------dump2------------------------------------------
2238 // Dump TypeLong
2239 #ifndef PRODUCT
2240 static const char* longnamenear(jlong x, const char* xname, char* buf, size_t buf_size, jlong n) {
2241 if (n > x) {
2242 if (n >= x + 10000) return nullptr;
2243 os::snprintf_checked(buf, buf_size, "%s+" JLONG_FORMAT, xname, n - x);
2244 } else if (n < x) {
2245 if (n <= x - 10000) return nullptr;
2246 os::snprintf_checked(buf, buf_size, "%s-" JLONG_FORMAT, xname, x - n);
2247 } else {
2248 return xname;
2249 }
2250 return buf;
2251 }
2252
2253 static const char* longname(char* buf, size_t buf_size, jlong n) {
2254 const char* str;
2255 if (n == min_jlong)
2256 return "min";
2257 else if (n < min_jlong + 10000)
2258 os::snprintf_checked(buf, buf_size, "min+" JLONG_FORMAT, n - min_jlong);
2259 else if (n == max_jlong)
2260 return "max";
2261 else if (n > max_jlong - 10000)
2262 os::snprintf_checked(buf, buf_size, "max-" JLONG_FORMAT, max_jlong - n);
2263 else if ((str = longnamenear(max_juint, "maxuint", buf, buf_size, n)) != nullptr)
2264 return str;
2265 else if ((str = longnamenear(max_jint, "maxint", buf, buf_size, n)) != nullptr)
2266 return str;
2267 else if ((str = longnamenear(min_jint, "minint", buf, buf_size, n)) != nullptr)
2268 return str;
2269 else
2270 os::snprintf_checked(buf, buf_size, JLONG_FORMAT, n);
2271 return buf;
2272 }
2273
2274 void TypeLong::dump2( Dict &d, uint depth, outputStream *st ) const {
2275 char buf[80], buf2[80];
2276 if (_lo == min_jlong && _hi == max_jlong)
2277 st->print("long");
2278 else if (is_con())
2279 st->print("long:%s", longname(buf, sizeof(buf), get_con()));
2280 else if (_hi == max_jlong)
2281 st->print("long:>=%s", longname(buf, sizeof(buf), _lo));
2282 else if (_lo == min_jlong)
2283 st->print("long:<=%s", longname(buf, sizeof(buf), _hi));
2284 else
2285 st->print("long:%s..%s", longname(buf, sizeof(buf), _lo), longname(buf2,sizeof(buf2), _hi));
2286
2287 if (_widen != 0 && this != TypeLong::LONG)
2288 st->print(":%.*s", _widen, "wwww");
2289 }
2290 #endif
2291
2292 //------------------------------singleton--------------------------------------
2293 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
2294 // constants
2295 bool TypeLong::singleton(void) const {
2296 return _lo >= _hi;
2297 }
2298
2299 bool TypeLong::empty(void) const {
2300 return _lo > _hi;
2301 }
2302
2303 //=============================================================================
2304 // Convenience common pre-built types.
2305 const TypeTuple *TypeTuple::IFBOTH; // Return both arms of IF as reachable
2306 const TypeTuple *TypeTuple::IFFALSE;
2307 const TypeTuple *TypeTuple::IFTRUE;
2308 const TypeTuple *TypeTuple::IFNEITHER;
2309 const TypeTuple *TypeTuple::LOOPBODY;
2310 const TypeTuple *TypeTuple::MEMBAR;
2311 const TypeTuple *TypeTuple::STORECONDITIONAL;
2312 const TypeTuple *TypeTuple::START_I2C;
2313 const TypeTuple *TypeTuple::INT_PAIR;
2314 const TypeTuple *TypeTuple::LONG_PAIR;
2315 const TypeTuple *TypeTuple::INT_CC_PAIR;
2316 const TypeTuple *TypeTuple::LONG_CC_PAIR;
2317
2318 //------------------------------make-------------------------------------------
2319 // Make a TypeTuple from the range of a method signature
2320 const TypeTuple *TypeTuple::make_range(ciSignature* sig, InterfaceHandling interface_handling) {
2321 ciType* return_type = sig->return_type();
2322 uint arg_cnt = return_type->size();
2323 const Type **field_array = fields(arg_cnt);
2324 switch (return_type->basic_type()) {
2325 case T_LONG:
2326 field_array[TypeFunc::Parms] = TypeLong::LONG;
2327 field_array[TypeFunc::Parms+1] = Type::HALF;
2328 break;
2329 case T_DOUBLE:
2330 field_array[TypeFunc::Parms] = Type::DOUBLE;
2331 field_array[TypeFunc::Parms+1] = Type::HALF;
2332 break;
2333 case T_OBJECT:
2334 case T_ARRAY:
2335 case T_BOOLEAN:
2336 case T_CHAR:
2337 case T_FLOAT:
2338 case T_BYTE:
2339 case T_SHORT:
2340 case T_INT:
2341 field_array[TypeFunc::Parms] = get_const_type(return_type, interface_handling);
2342 break;
2343 case T_VOID:
2344 break;
2345 default:
2346 ShouldNotReachHere();
2347 }
2348 return (TypeTuple*)(new TypeTuple(TypeFunc::Parms + arg_cnt, field_array))->hashcons();
2349 }
2350
2351 // Make a TypeTuple from the domain of a method signature
2352 const TypeTuple *TypeTuple::make_domain(ciInstanceKlass* recv, ciSignature* sig, InterfaceHandling interface_handling) {
2353 uint arg_cnt = sig->size();
2354
2355 uint pos = TypeFunc::Parms;
2356 const Type **field_array;
2357 if (recv != nullptr) {
2358 arg_cnt++;
2359 field_array = fields(arg_cnt);
2360 // Use get_const_type here because it respects UseUniqueSubclasses:
2361 field_array[pos++] = get_const_type(recv, interface_handling)->join_speculative(TypePtr::NOTNULL);
2362 } else {
2363 field_array = fields(arg_cnt);
2364 }
2365
2366 int i = 0;
2367 while (pos < TypeFunc::Parms + arg_cnt) {
2368 ciType* type = sig->type_at(i);
2369
2370 switch (type->basic_type()) {
2371 case T_LONG:
2372 field_array[pos++] = TypeLong::LONG;
2373 field_array[pos++] = Type::HALF;
2374 break;
2375 case T_DOUBLE:
2376 field_array[pos++] = Type::DOUBLE;
2377 field_array[pos++] = Type::HALF;
2378 break;
2379 case T_OBJECT:
2380 case T_ARRAY:
2381 case T_FLOAT:
2382 case T_INT:
2383 field_array[pos++] = get_const_type(type, interface_handling);
2384 break;
2385 case T_BOOLEAN:
2386 case T_CHAR:
2387 case T_BYTE:
2388 case T_SHORT:
2389 field_array[pos++] = TypeInt::INT;
2390 break;
2391 default:
2392 ShouldNotReachHere();
2393 }
2394 i++;
2395 }
2396
2397 return (TypeTuple*)(new TypeTuple(TypeFunc::Parms + arg_cnt, field_array))->hashcons();
2398 }
2399
2400 const TypeTuple *TypeTuple::make( uint cnt, const Type **fields ) {
2401 return (TypeTuple*)(new TypeTuple(cnt,fields))->hashcons();
2402 }
2403
2404 //------------------------------fields-----------------------------------------
2405 // Subroutine call type with space allocated for argument types
2406 // Memory for Control, I_O, Memory, FramePtr, and ReturnAdr is allocated implicitly
2407 const Type **TypeTuple::fields( uint arg_cnt ) {
2408 const Type **flds = (const Type **)(Compile::current()->type_arena()->AmallocWords((TypeFunc::Parms+arg_cnt)*sizeof(Type*) ));
2409 flds[TypeFunc::Control ] = Type::CONTROL;
2410 flds[TypeFunc::I_O ] = Type::ABIO;
2411 flds[TypeFunc::Memory ] = Type::MEMORY;
2412 flds[TypeFunc::FramePtr ] = TypeRawPtr::BOTTOM;
2413 flds[TypeFunc::ReturnAdr] = Type::RETURN_ADDRESS;
2414
2415 return flds;
2416 }
2417
2418 //------------------------------meet-------------------------------------------
2419 // Compute the MEET of two types. It returns a new Type object.
2420 const Type *TypeTuple::xmeet( const Type *t ) const {
2421 // Perform a fast test for common case; meeting the same types together.
2422 if( this == t ) return this; // Meeting same type-rep?
2423
2424 // Current "this->_base" is Tuple
2425 switch (t->base()) { // switch on original type
2426
2427 case Bottom: // Ye Olde Default
2428 return t;
2429
2430 default: // All else is a mistake
2431 typerr(t);
2432
2433 case Tuple: { // Meeting 2 signatures?
2434 const TypeTuple *x = t->is_tuple();
2435 assert( _cnt == x->_cnt, "" );
2436 const Type **fields = (const Type **)(Compile::current()->type_arena()->AmallocWords( _cnt*sizeof(Type*) ));
2437 for( uint i=0; i<_cnt; i++ )
2438 fields[i] = field_at(i)->xmeet( x->field_at(i) );
2439 return TypeTuple::make(_cnt,fields);
2440 }
2441 case Top:
2442 break;
2443 }
2444 return this; // Return the double constant
2445 }
2446
2447 //------------------------------xdual------------------------------------------
2448 // Dual: compute field-by-field dual
2449 const Type *TypeTuple::xdual() const {
2450 const Type **fields = (const Type **)(Compile::current()->type_arena()->AmallocWords( _cnt*sizeof(Type*) ));
2451 for( uint i=0; i<_cnt; i++ )
2452 fields[i] = _fields[i]->dual();
2453 return new TypeTuple(_cnt,fields);
2454 }
2455
2456 //------------------------------eq---------------------------------------------
2457 // Structural equality check for Type representations
2458 bool TypeTuple::eq( const Type *t ) const {
2459 const TypeTuple *s = (const TypeTuple *)t;
2460 if (_cnt != s->_cnt) return false; // Unequal field counts
2461 for (uint i = 0; i < _cnt; i++)
2462 if (field_at(i) != s->field_at(i)) // POINTER COMPARE! NO RECURSION!
2463 return false; // Missed
2464 return true;
2465 }
2466
2467 //------------------------------hash-------------------------------------------
2468 // Type-specific hashing function.
2469 uint TypeTuple::hash(void) const {
2470 uintptr_t sum = _cnt;
2471 for( uint i=0; i<_cnt; i++ )
2472 sum += (uintptr_t)_fields[i]; // Hash on pointers directly
2473 return (uint)sum;
2474 }
2475
2476 //------------------------------dump2------------------------------------------
2477 // Dump signature Type
2478 #ifndef PRODUCT
2479 void TypeTuple::dump2( Dict &d, uint depth, outputStream *st ) const {
2480 st->print("{");
2481 if( !depth || d[this] ) { // Check for recursive print
2482 st->print("...}");
2483 return;
2484 }
2485 d.Insert((void*)this, (void*)this); // Stop recursion
2486 if( _cnt ) {
2487 uint i;
2488 for( i=0; i<_cnt-1; i++ ) {
2489 st->print("%d:", i);
2490 _fields[i]->dump2(d, depth-1, st);
2491 st->print(", ");
2492 }
2493 st->print("%d:", i);
2494 _fields[i]->dump2(d, depth-1, st);
2495 }
2496 st->print("}");
2497 }
2498 #endif
2499
2500 //------------------------------singleton--------------------------------------
2501 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
2502 // constants (Ldi nodes). Singletons are integer, float or double constants
2503 // or a single symbol.
2504 bool TypeTuple::singleton(void) const {
2505 return false; // Never a singleton
2506 }
2507
2508 bool TypeTuple::empty(void) const {
2509 for( uint i=0; i<_cnt; i++ ) {
2510 if (_fields[i]->empty()) return true;
2511 }
2512 return false;
2513 }
2514
2515 //=============================================================================
2516 // Convenience common pre-built types.
2517
2518 inline const TypeInt* normalize_array_size(const TypeInt* size) {
2519 // Certain normalizations keep us sane when comparing types.
2520 // We do not want arrayOop variables to differ only by the wideness
2521 // of their index types. Pick minimum wideness, since that is the
2522 // forced wideness of small ranges anyway.
2523 if (size->_widen != Type::WidenMin)
2524 return TypeInt::make(size->_lo, size->_hi, Type::WidenMin);
2525 else
2526 return size;
2527 }
2528
2529 //------------------------------make-------------------------------------------
2530 const TypeAry* TypeAry::make(const Type* elem, const TypeInt* size, bool stable) {
2531 if (UseCompressedOops && elem->isa_oopptr()) {
2532 elem = elem->make_narrowoop();
2533 }
2534 size = normalize_array_size(size);
2535 return (TypeAry*)(new TypeAry(elem,size,stable))->hashcons();
2536 }
2537
2538 //------------------------------meet-------------------------------------------
2539 // Compute the MEET of two types. It returns a new Type object.
2540 const Type *TypeAry::xmeet( const Type *t ) const {
2541 // Perform a fast test for common case; meeting the same types together.
2542 if( this == t ) return this; // Meeting same type-rep?
2543
2544 // Current "this->_base" is Ary
2545 switch (t->base()) { // switch on original type
2546
2547 case Bottom: // Ye Olde Default
2548 return t;
2549
2550 default: // All else is a mistake
2551 typerr(t);
2552
2553 case Array: { // Meeting 2 arrays?
2554 const TypeAry *a = t->is_ary();
2555 return TypeAry::make(_elem->meet_speculative(a->_elem),
2556 _size->xmeet(a->_size)->is_int(),
2557 _stable && a->_stable);
2558 }
2559 case Top:
2560 break;
2561 }
2562 return this; // Return the double constant
2563 }
2564
2565 //------------------------------xdual------------------------------------------
2566 // Dual: compute field-by-field dual
2567 const Type *TypeAry::xdual() const {
2568 const TypeInt* size_dual = _size->dual()->is_int();
2569 size_dual = normalize_array_size(size_dual);
2570 return new TypeAry(_elem->dual(), size_dual, !_stable);
2571 }
2572
2573 //------------------------------eq---------------------------------------------
2574 // Structural equality check for Type representations
2575 bool TypeAry::eq( const Type *t ) const {
2576 const TypeAry *a = (const TypeAry*)t;
2577 return _elem == a->_elem &&
2578 _stable == a->_stable &&
2579 _size == a->_size;
2580 }
2581
2582 //------------------------------hash-------------------------------------------
2583 // Type-specific hashing function.
2584 uint TypeAry::hash(void) const {
2585 return (uint)(uintptr_t)_elem + (uint)(uintptr_t)_size + (uint)(_stable ? 43 : 0);
2586 }
2587
2588 /**
2589 * Return same type without a speculative part in the element
2590 */
2591 const TypeAry* TypeAry::remove_speculative() const {
2592 return make(_elem->remove_speculative(), _size, _stable);
2593 }
2594
2595 /**
2596 * Return same type with cleaned up speculative part of element
2597 */
2598 const Type* TypeAry::cleanup_speculative() const {
2599 return make(_elem->cleanup_speculative(), _size, _stable);
2600 }
2601
2602 /**
2603 * Return same type but with a different inline depth (used for speculation)
2604 *
2605 * @param depth depth to meet with
2606 */
2607 const TypePtr* TypePtr::with_inline_depth(int depth) const {
2608 if (!UseInlineDepthForSpeculativeTypes) {
2609 return this;
2610 }
2611 return make(AnyPtr, _ptr, _offset, _speculative, depth);
2612 }
2613
2614 //------------------------------dump2------------------------------------------
2615 #ifndef PRODUCT
2616 void TypeAry::dump2( Dict &d, uint depth, outputStream *st ) const {
2617 if (_stable) st->print("stable:");
2618 _elem->dump2(d, depth, st);
2619 st->print("[");
2620 _size->dump2(d, depth, st);
2621 st->print("]");
2622 }
2623 #endif
2624
2625 //------------------------------singleton--------------------------------------
2626 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
2627 // constants (Ldi nodes). Singletons are integer, float or double constants
2628 // or a single symbol.
2629 bool TypeAry::singleton(void) const {
2630 return false; // Never a singleton
2631 }
2632
2633 bool TypeAry::empty(void) const {
2634 return _elem->empty() || _size->empty();
2635 }
2636
2637 //--------------------------ary_must_be_exact----------------------------------
2638 bool TypeAry::ary_must_be_exact() const {
2639 // This logic looks at the element type of an array, and returns true
2640 // if the element type is either a primitive or a final instance class.
2641 // In such cases, an array built on this ary must have no subclasses.
2642 if (_elem == BOTTOM) return false; // general array not exact
2643 if (_elem == TOP ) return false; // inverted general array not exact
2644 const TypeOopPtr* toop = nullptr;
2645 if (UseCompressedOops && _elem->isa_narrowoop()) {
2646 toop = _elem->make_ptr()->isa_oopptr();
2647 } else {
2648 toop = _elem->isa_oopptr();
2649 }
2650 if (!toop) return true; // a primitive type, like int
2651 if (!toop->is_loaded()) return false; // unloaded class
2652 const TypeInstPtr* tinst;
2653 if (_elem->isa_narrowoop())
2654 tinst = _elem->make_ptr()->isa_instptr();
2655 else
2656 tinst = _elem->isa_instptr();
2657 if (tinst)
2658 return tinst->instance_klass()->is_final();
2659 const TypeAryPtr* tap;
2660 if (_elem->isa_narrowoop())
2661 tap = _elem->make_ptr()->isa_aryptr();
2662 else
2663 tap = _elem->isa_aryptr();
2664 if (tap)
2665 return tap->ary()->ary_must_be_exact();
2666 return false;
2667 }
2668
2669 //==============================TypeVect=======================================
2670 // Convenience common pre-built types.
2671 const TypeVect* TypeVect::VECTA = nullptr; // vector length agnostic
2672 const TypeVect* TypeVect::VECTS = nullptr; // 32-bit vectors
2673 const TypeVect* TypeVect::VECTD = nullptr; // 64-bit vectors
2674 const TypeVect* TypeVect::VECTX = nullptr; // 128-bit vectors
2675 const TypeVect* TypeVect::VECTY = nullptr; // 256-bit vectors
2676 const TypeVect* TypeVect::VECTZ = nullptr; // 512-bit vectors
2677 const TypeVect* TypeVect::VECTMASK = nullptr; // predicate/mask vector
2678
2679 //------------------------------make-------------------------------------------
2680 const TypeVect* TypeVect::make(BasicType elem_bt, uint length, bool is_mask) {
2681 if (is_mask) {
2682 return makemask(elem_bt, length);
2683 }
2684 assert(is_java_primitive(elem_bt), "only primitive types in vector");
2685 assert(Matcher::vector_size_supported(elem_bt, length), "length in range");
2686 int size = length * type2aelembytes(elem_bt);
2687 switch (Matcher::vector_ideal_reg(size)) {
2688 case Op_VecA:
2689 return (TypeVect*)(new TypeVectA(elem_bt, length))->hashcons();
2690 case Op_VecS:
2691 return (TypeVect*)(new TypeVectS(elem_bt, length))->hashcons();
2692 case Op_RegL:
2693 case Op_VecD:
2694 case Op_RegD:
2695 return (TypeVect*)(new TypeVectD(elem_bt, length))->hashcons();
2696 case Op_VecX:
2697 return (TypeVect*)(new TypeVectX(elem_bt, length))->hashcons();
2698 case Op_VecY:
2699 return (TypeVect*)(new TypeVectY(elem_bt, length))->hashcons();
2700 case Op_VecZ:
2701 return (TypeVect*)(new TypeVectZ(elem_bt, length))->hashcons();
2702 }
2703 ShouldNotReachHere();
2704 return nullptr;
2705 }
2706
2707 const TypeVect* TypeVect::makemask(BasicType elem_bt, uint length) {
2708 if (Matcher::has_predicated_vectors() &&
2709 Matcher::match_rule_supported_vector_masked(Op_VectorLoadMask, length, elem_bt)) {
2710 return TypeVectMask::make(elem_bt, length);
2711 } else {
2712 return make(elem_bt, length);
2713 }
2714 }
2715
2716 //------------------------------meet-------------------------------------------
2717 // Compute the MEET of two types. Since each TypeVect is the only instance of
2718 // its species, meeting often returns itself
2719 const Type* TypeVect::xmeet(const Type* t) const {
2720 // Perform a fast test for common case; meeting the same types together.
2721 if (this == t) {
2722 return this;
2723 }
2724
2725 // Current "this->_base" is Vector
2726 switch (t->base()) { // switch on original type
2727
2728 case Bottom: // Ye Olde Default
2729 return t;
2730
2731 default: // All else is a mistake
2732 typerr(t);
2733 case VectorMask:
2734 case VectorA:
2735 case VectorS:
2736 case VectorD:
2737 case VectorX:
2738 case VectorY:
2739 case VectorZ: { // Meeting 2 vectors?
2740 const TypeVect* v = t->is_vect();
2741 assert(base() == v->base(), "");
2742 assert(length() == v->length(), "");
2743 assert(element_basic_type() == v->element_basic_type(), "");
2744 return this;
2745 }
2746 case Top:
2747 break;
2748 }
2749 return this;
2750 }
2751
2752 //------------------------------xdual------------------------------------------
2753 // Since each TypeVect is the only instance of its species, it is self-dual
2754 const Type* TypeVect::xdual() const {
2755 return this;
2756 }
2757
2758 //------------------------------eq---------------------------------------------
2759 // Structural equality check for Type representations
2760 bool TypeVect::eq(const Type* t) const {
2761 const TypeVect* v = t->is_vect();
2762 return (element_basic_type() == v->element_basic_type()) && (length() == v->length());
2763 }
2764
2765 //------------------------------hash-------------------------------------------
2766 // Type-specific hashing function.
2767 uint TypeVect::hash(void) const {
2768 return (uint)base() + (uint)(uintptr_t)_elem_bt + (uint)(uintptr_t)_length;
2769 }
2770
2771 //------------------------------singleton--------------------------------------
2772 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
2773 // constants (Ldi nodes). Vector is singleton if all elements are the same
2774 // constant value (when vector is created with Replicate code).
2775 bool TypeVect::singleton(void) const {
2776 // There is no Con node for vectors yet.
2777 // return _elem->singleton();
2778 return false;
2779 }
2780
2781 bool TypeVect::empty(void) const {
2782 return false;
2783 }
2784
2785 //------------------------------dump2------------------------------------------
2786 #ifndef PRODUCT
2787 void TypeVect::dump2(Dict& d, uint depth, outputStream* st) const {
2788 switch (base()) {
2789 case VectorA:
2790 st->print("vectora"); break;
2791 case VectorS:
2792 st->print("vectors"); break;
2793 case VectorD:
2794 st->print("vectord"); break;
2795 case VectorX:
2796 st->print("vectorx"); break;
2797 case VectorY:
2798 st->print("vectory"); break;
2799 case VectorZ:
2800 st->print("vectorz"); break;
2801 case VectorMask:
2802 st->print("vectormask"); break;
2803 default:
2804 ShouldNotReachHere();
2805 }
2806 st->print("<%c,%u>", type2char(element_basic_type()), length());
2807 }
2808 #endif
2809
2810 const TypeVectMask* TypeVectMask::make(const BasicType elem_bt, uint length) {
2811 return (TypeVectMask*) (new TypeVectMask(elem_bt, length))->hashcons();
2812 }
2813
2814 //=============================================================================
2815 // Convenience common pre-built types.
2816 const TypePtr *TypePtr::NULL_PTR;
2817 const TypePtr *TypePtr::NOTNULL;
2818 const TypePtr *TypePtr::BOTTOM;
2819
2820 //------------------------------meet-------------------------------------------
2821 // Meet over the PTR enum
2822 const TypePtr::PTR TypePtr::ptr_meet[TypePtr::lastPTR][TypePtr::lastPTR] = {
2823 // TopPTR, AnyNull, Constant, Null, NotNull, BotPTR,
2824 { /* Top */ TopPTR, AnyNull, Constant, Null, NotNull, BotPTR,},
2825 { /* AnyNull */ AnyNull, AnyNull, Constant, BotPTR, NotNull, BotPTR,},
2826 { /* Constant*/ Constant, Constant, Constant, BotPTR, NotNull, BotPTR,},
2827 { /* Null */ Null, BotPTR, BotPTR, Null, BotPTR, BotPTR,},
2828 { /* NotNull */ NotNull, NotNull, NotNull, BotPTR, NotNull, BotPTR,},
2829 { /* BotPTR */ BotPTR, BotPTR, BotPTR, BotPTR, BotPTR, BotPTR,}
2830 };
2831
2832 //------------------------------make-------------------------------------------
2833 const TypePtr *TypePtr::make(TYPES t, enum PTR ptr, int offset, const TypePtr* speculative, int inline_depth) {
2834 return (TypePtr*)(new TypePtr(t,ptr,offset, speculative, inline_depth))->hashcons();
2835 }
2836
2837 //------------------------------cast_to_ptr_type-------------------------------
2838 const TypePtr* TypePtr::cast_to_ptr_type(PTR ptr) const {
2839 assert(_base == AnyPtr, "subclass must override cast_to_ptr_type");
2840 if( ptr == _ptr ) return this;
2841 return make(_base, ptr, _offset, _speculative, _inline_depth);
2842 }
2843
2844 //------------------------------get_con----------------------------------------
2845 intptr_t TypePtr::get_con() const {
2846 assert( _ptr == Null, "" );
2847 return _offset;
2848 }
2849
2850 //------------------------------meet-------------------------------------------
2851 // Compute the MEET of two types. It returns a new Type object.
2852 const Type *TypePtr::xmeet(const Type *t) const {
2853 const Type* res = xmeet_helper(t);
2854 if (res->isa_ptr() == nullptr) {
2855 return res;
2856 }
2857
2858 const TypePtr* res_ptr = res->is_ptr();
2859 if (res_ptr->speculative() != nullptr) {
2860 // type->speculative() is null means that speculation is no better
2861 // than type, i.e. type->speculative() == type. So there are 2
2862 // ways to represent the fact that we have no useful speculative
2863 // data and we should use a single one to be able to test for
2864 // equality between types. Check whether type->speculative() ==
2865 // type and set speculative to null if it is the case.
2866 if (res_ptr->remove_speculative() == res_ptr->speculative()) {
2867 return res_ptr->remove_speculative();
2868 }
2869 }
2870
2871 return res;
2872 }
2873
2874 const Type *TypePtr::xmeet_helper(const Type *t) const {
2875 // Perform a fast test for common case; meeting the same types together.
2876 if( this == t ) return this; // Meeting same type-rep?
2877
2878 // Current "this->_base" is AnyPtr
2879 switch (t->base()) { // switch on original type
2880 case Int: // Mixing ints & oops happens when javac
2881 case Long: // reuses local variables
2882 case HalfFloatTop:
2883 case HalfFloatCon:
2884 case HalfFloatBot:
2885 case FloatTop:
2886 case FloatCon:
2887 case FloatBot:
2888 case DoubleTop:
2889 case DoubleCon:
2890 case DoubleBot:
2891 case NarrowOop:
2892 case NarrowKlass:
2893 case Bottom: // Ye Olde Default
2894 return Type::BOTTOM;
2895 case Top:
2896 return this;
2897
2898 case AnyPtr: { // Meeting to AnyPtrs
2899 const TypePtr *tp = t->is_ptr();
2900 const TypePtr* speculative = xmeet_speculative(tp);
2901 int depth = meet_inline_depth(tp->inline_depth());
2902 return make(AnyPtr, meet_ptr(tp->ptr()), meet_offset(tp->offset()), speculative, depth);
2903 }
2904 case RawPtr: // For these, flip the call around to cut down
2905 case OopPtr:
2906 case InstPtr: // on the cases I have to handle.
2907 case AryPtr:
2908 case MetadataPtr:
2909 case KlassPtr:
2910 case InstKlassPtr:
2911 case AryKlassPtr:
2912 return t->xmeet(this); // Call in reverse direction
2913 default: // All else is a mistake
2914 typerr(t);
2915
2916 }
2917 return this;
2918 }
2919
2920 //------------------------------meet_offset------------------------------------
2921 int TypePtr::meet_offset( int offset ) const {
2922 // Either is 'TOP' offset? Return the other offset!
2923 if( _offset == OffsetTop ) return offset;
2924 if( offset == OffsetTop ) return _offset;
2925 // If either is different, return 'BOTTOM' offset
2926 if( _offset != offset ) return OffsetBot;
2927 return _offset;
2928 }
2929
2930 //------------------------------dual_offset------------------------------------
2931 int TypePtr::dual_offset( ) const {
2932 if( _offset == OffsetTop ) return OffsetBot;// Map 'TOP' into 'BOTTOM'
2933 if( _offset == OffsetBot ) return OffsetTop;// Map 'BOTTOM' into 'TOP'
2934 return _offset; // Map everything else into self
2935 }
2936
2937 //------------------------------xdual------------------------------------------
2938 // Dual: compute field-by-field dual
2939 const TypePtr::PTR TypePtr::ptr_dual[TypePtr::lastPTR] = {
2940 BotPTR, NotNull, Constant, Null, AnyNull, TopPTR
2941 };
2942 const Type *TypePtr::xdual() const {
2943 return new TypePtr(AnyPtr, dual_ptr(), dual_offset(), dual_speculative(), dual_inline_depth());
2944 }
2945
2946 //------------------------------xadd_offset------------------------------------
2947 int TypePtr::xadd_offset( intptr_t offset ) const {
2948 // Adding to 'TOP' offset? Return 'TOP'!
2949 if( _offset == OffsetTop || offset == OffsetTop ) return OffsetTop;
2950 // Adding to 'BOTTOM' offset? Return 'BOTTOM'!
2951 if( _offset == OffsetBot || offset == OffsetBot ) return OffsetBot;
2952 // Addition overflows or "accidentally" equals to OffsetTop? Return 'BOTTOM'!
2953 offset += (intptr_t)_offset;
2954 if (offset != (int)offset || offset == OffsetTop) return OffsetBot;
2955
2956 // assert( _offset >= 0 && _offset+offset >= 0, "" );
2957 // It is possible to construct a negative offset during PhaseCCP
2958
2959 return (int)offset; // Sum valid offsets
2960 }
2961
2962 //------------------------------add_offset-------------------------------------
2963 const TypePtr *TypePtr::add_offset( intptr_t offset ) const {
2964 return make(AnyPtr, _ptr, xadd_offset(offset), _speculative, _inline_depth);
2965 }
2966
2967 const TypePtr *TypePtr::with_offset(intptr_t offset) const {
2968 return make(AnyPtr, _ptr, offset, _speculative, _inline_depth);
2969 }
2970
2971 //------------------------------eq---------------------------------------------
2972 // Structural equality check for Type representations
2973 bool TypePtr::eq( const Type *t ) const {
2974 const TypePtr *a = (const TypePtr*)t;
2975 return _ptr == a->ptr() && _offset == a->offset() && eq_speculative(a) && _inline_depth == a->_inline_depth;
2976 }
2977
2978 //------------------------------hash-------------------------------------------
2979 // Type-specific hashing function.
2980 uint TypePtr::hash(void) const {
2981 return (uint)_ptr + (uint)_offset + (uint)hash_speculative() + (uint)_inline_depth;
2982 }
2983
2984 /**
2985 * Return same type without a speculative part
2986 */
2987 const TypePtr* TypePtr::remove_speculative() const {
2988 if (_speculative == nullptr) {
2989 return this;
2990 }
2991 assert(_inline_depth == InlineDepthTop || _inline_depth == InlineDepthBottom, "non speculative type shouldn't have inline depth");
2992 return make(AnyPtr, _ptr, _offset, nullptr, _inline_depth);
2993 }
2994
2995 /**
2996 * Return same type but drop speculative part if we know we won't use
2997 * it
2998 */
2999 const Type* TypePtr::cleanup_speculative() const {
3000 if (speculative() == nullptr) {
3001 return this;
3002 }
3003 const Type* no_spec = remove_speculative();
3004 // If this is NULL_PTR then we don't need the speculative type
3005 // (with_inline_depth in case the current type inline depth is
3006 // InlineDepthTop)
3007 if (no_spec == NULL_PTR->with_inline_depth(inline_depth())) {
3008 return no_spec;
3009 }
3010 if (above_centerline(speculative()->ptr())) {
3011 return no_spec;
3012 }
3013 const TypeOopPtr* spec_oopptr = speculative()->isa_oopptr();
3014 // If the speculative may be null and is an inexact klass then it
3015 // doesn't help
3016 if (speculative() != TypePtr::NULL_PTR && speculative()->maybe_null() &&
3017 (spec_oopptr == nullptr || !spec_oopptr->klass_is_exact())) {
3018 return no_spec;
3019 }
3020 return this;
3021 }
3022
3023 /**
3024 * dual of the speculative part of the type
3025 */
3026 const TypePtr* TypePtr::dual_speculative() const {
3027 if (_speculative == nullptr) {
3028 return nullptr;
3029 }
3030 return _speculative->dual()->is_ptr();
3031 }
3032
3033 /**
3034 * meet of the speculative parts of 2 types
3035 *
3036 * @param other type to meet with
3037 */
3038 const TypePtr* TypePtr::xmeet_speculative(const TypePtr* other) const {
3039 bool this_has_spec = (_speculative != nullptr);
3040 bool other_has_spec = (other->speculative() != nullptr);
3041
3042 if (!this_has_spec && !other_has_spec) {
3043 return nullptr;
3044 }
3045
3046 // If we are at a point where control flow meets and one branch has
3047 // a speculative type and the other has not, we meet the speculative
3048 // type of one branch with the actual type of the other. If the
3049 // actual type is exact and the speculative is as well, then the
3050 // result is a speculative type which is exact and we can continue
3051 // speculation further.
3052 const TypePtr* this_spec = _speculative;
3053 const TypePtr* other_spec = other->speculative();
3054
3055 if (!this_has_spec) {
3056 this_spec = this;
3057 }
3058
3059 if (!other_has_spec) {
3060 other_spec = other;
3061 }
3062
3063 return this_spec->meet(other_spec)->is_ptr();
3064 }
3065
3066 /**
3067 * dual of the inline depth for this type (used for speculation)
3068 */
3069 int TypePtr::dual_inline_depth() const {
3070 return -inline_depth();
3071 }
3072
3073 /**
3074 * meet of 2 inline depths (used for speculation)
3075 *
3076 * @param depth depth to meet with
3077 */
3078 int TypePtr::meet_inline_depth(int depth) const {
3079 return MAX2(inline_depth(), depth);
3080 }
3081
3082 /**
3083 * Are the speculative parts of 2 types equal?
3084 *
3085 * @param other type to compare this one to
3086 */
3087 bool TypePtr::eq_speculative(const TypePtr* other) const {
3088 if (_speculative == nullptr || other->speculative() == nullptr) {
3089 return _speculative == other->speculative();
3090 }
3091
3092 if (_speculative->base() != other->speculative()->base()) {
3093 return false;
3094 }
3095
3096 return _speculative->eq(other->speculative());
3097 }
3098
3099 /**
3100 * Hash of the speculative part of the type
3101 */
3102 int TypePtr::hash_speculative() const {
3103 if (_speculative == nullptr) {
3104 return 0;
3105 }
3106
3107 return _speculative->hash();
3108 }
3109
3110 /**
3111 * add offset to the speculative part of the type
3112 *
3113 * @param offset offset to add
3114 */
3115 const TypePtr* TypePtr::add_offset_speculative(intptr_t offset) const {
3116 if (_speculative == nullptr) {
3117 return nullptr;
3118 }
3119 return _speculative->add_offset(offset)->is_ptr();
3120 }
3121
3122 const TypePtr* TypePtr::with_offset_speculative(intptr_t offset) const {
3123 if (_speculative == nullptr) {
3124 return nullptr;
3125 }
3126 return _speculative->with_offset(offset)->is_ptr();
3127 }
3128
3129 /**
3130 * return exact klass from the speculative type if there's one
3131 */
3132 ciKlass* TypePtr::speculative_type() const {
3133 if (_speculative != nullptr && _speculative->isa_oopptr()) {
3134 const TypeOopPtr* speculative = _speculative->join(this)->is_oopptr();
3135 if (speculative->klass_is_exact()) {
3136 return speculative->exact_klass();
3137 }
3138 }
3139 return nullptr;
3140 }
3141
3142 /**
3143 * return true if speculative type may be null
3144 */
3145 bool TypePtr::speculative_maybe_null() const {
3146 if (_speculative != nullptr) {
3147 const TypePtr* speculative = _speculative->join(this)->is_ptr();
3148 return speculative->maybe_null();
3149 }
3150 return true;
3151 }
3152
3153 bool TypePtr::speculative_always_null() const {
3154 if (_speculative != nullptr) {
3155 const TypePtr* speculative = _speculative->join(this)->is_ptr();
3156 return speculative == TypePtr::NULL_PTR;
3157 }
3158 return false;
3159 }
3160
3161 /**
3162 * Same as TypePtr::speculative_type() but return the klass only if
3163 * the speculative tells us is not null
3164 */
3165 ciKlass* TypePtr::speculative_type_not_null() const {
3166 if (speculative_maybe_null()) {
3167 return nullptr;
3168 }
3169 return speculative_type();
3170 }
3171
3172 /**
3173 * Check whether new profiling would improve speculative type
3174 *
3175 * @param exact_kls class from profiling
3176 * @param inline_depth inlining depth of profile point
3177 *
3178 * @return true if type profile is valuable
3179 */
3180 bool TypePtr::would_improve_type(ciKlass* exact_kls, int inline_depth) const {
3181 // no profiling?
3182 if (exact_kls == nullptr) {
3183 return false;
3184 }
3185 if (speculative() == TypePtr::NULL_PTR) {
3186 return false;
3187 }
3188 // no speculative type or non exact speculative type?
3189 if (speculative_type() == nullptr) {
3190 return true;
3191 }
3192 // If the node already has an exact speculative type keep it,
3193 // unless it was provided by profiling that is at a deeper
3194 // inlining level. Profiling at a higher inlining depth is
3195 // expected to be less accurate.
3196 if (_speculative->inline_depth() == InlineDepthBottom) {
3197 return false;
3198 }
3199 assert(_speculative->inline_depth() != InlineDepthTop, "can't do the comparison");
3200 return inline_depth < _speculative->inline_depth();
3201 }
3202
3203 /**
3204 * Check whether new profiling would improve ptr (= tells us it is non
3205 * null)
3206 *
3207 * @param ptr_kind always null or not null?
3208 *
3209 * @return true if ptr profile is valuable
3210 */
3211 bool TypePtr::would_improve_ptr(ProfilePtrKind ptr_kind) const {
3212 // profiling doesn't tell us anything useful
3213 if (ptr_kind != ProfileAlwaysNull && ptr_kind != ProfileNeverNull) {
3214 return false;
3215 }
3216 // We already know this is not null
3217 if (!this->maybe_null()) {
3218 return false;
3219 }
3220 // We already know the speculative type cannot be null
3221 if (!speculative_maybe_null()) {
3222 return false;
3223 }
3224 // We already know this is always null
3225 if (this == TypePtr::NULL_PTR) {
3226 return false;
3227 }
3228 // We already know the speculative type is always null
3229 if (speculative_always_null()) {
3230 return false;
3231 }
3232 if (ptr_kind == ProfileAlwaysNull && speculative() != nullptr && speculative()->isa_oopptr()) {
3233 return false;
3234 }
3235 return true;
3236 }
3237
3238 //------------------------------dump2------------------------------------------
3239 const char *const TypePtr::ptr_msg[TypePtr::lastPTR] = {
3240 "TopPTR","AnyNull","Constant","null","NotNull","BotPTR"
3241 };
3242
3243 #ifndef PRODUCT
3244 void TypePtr::dump2( Dict &d, uint depth, outputStream *st ) const {
3245 if( _ptr == Null ) st->print("null");
3246 else st->print("%s *", ptr_msg[_ptr]);
3247 if( _offset == OffsetTop ) st->print("+top");
3248 else if( _offset == OffsetBot ) st->print("+bot");
3249 else if( _offset ) st->print("+%d", _offset);
3250 dump_inline_depth(st);
3251 dump_speculative(st);
3252 }
3253
3254 /**
3255 *dump the speculative part of the type
3256 */
3257 void TypePtr::dump_speculative(outputStream *st) const {
3258 if (_speculative != nullptr) {
3259 st->print(" (speculative=");
3260 _speculative->dump_on(st);
3261 st->print(")");
3262 }
3263 }
3264
3265 /**
3266 *dump the inline depth of the type
3267 */
3268 void TypePtr::dump_inline_depth(outputStream *st) const {
3269 if (_inline_depth != InlineDepthBottom) {
3270 if (_inline_depth == InlineDepthTop) {
3271 st->print(" (inline_depth=InlineDepthTop)");
3272 } else {
3273 st->print(" (inline_depth=%d)", _inline_depth);
3274 }
3275 }
3276 }
3277 #endif
3278
3279 //------------------------------singleton--------------------------------------
3280 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
3281 // constants
3282 bool TypePtr::singleton(void) const {
3283 // TopPTR, Null, AnyNull, Constant are all singletons
3284 return (_offset != OffsetBot) && !below_centerline(_ptr);
3285 }
3286
3287 bool TypePtr::empty(void) const {
3288 return (_offset == OffsetTop) || above_centerline(_ptr);
3289 }
3290
3291 //=============================================================================
3292 // Convenience common pre-built types.
3293 const TypeRawPtr *TypeRawPtr::BOTTOM;
3294 const TypeRawPtr *TypeRawPtr::NOTNULL;
3295
3296 //------------------------------make-------------------------------------------
3297 const TypeRawPtr *TypeRawPtr::make( enum PTR ptr ) {
3298 assert( ptr != Constant, "what is the constant?" );
3299 assert( ptr != Null, "Use TypePtr for null" );
3300 return (TypeRawPtr*)(new TypeRawPtr(ptr,nullptr))->hashcons();
3301 }
3302
3303 const TypeRawPtr *TypeRawPtr::make(address bits) {
3304 assert(bits != nullptr, "Use TypePtr for null");
3305 return (TypeRawPtr*)(new TypeRawPtr(Constant,bits))->hashcons();
3306 }
3307
3308 //------------------------------cast_to_ptr_type-------------------------------
3309 const TypeRawPtr* TypeRawPtr::cast_to_ptr_type(PTR ptr) const {
3310 assert( ptr != Constant, "what is the constant?" );
3311 assert( ptr != Null, "Use TypePtr for null" );
3312 assert( _bits == nullptr, "Why cast a constant address?");
3313 if( ptr == _ptr ) return this;
3314 return make(ptr);
3315 }
3316
3317 //------------------------------get_con----------------------------------------
3318 intptr_t TypeRawPtr::get_con() const {
3319 assert( _ptr == Null || _ptr == Constant, "" );
3320 return (intptr_t)_bits;
3321 }
3322
3323 //------------------------------meet-------------------------------------------
3324 // Compute the MEET of two types. It returns a new Type object.
3325 const Type *TypeRawPtr::xmeet( const Type *t ) const {
3326 // Perform a fast test for common case; meeting the same types together.
3327 if( this == t ) return this; // Meeting same type-rep?
3328
3329 // Current "this->_base" is RawPtr
3330 switch( t->base() ) { // switch on original type
3331 case Bottom: // Ye Olde Default
3332 return t;
3333 case Top:
3334 return this;
3335 case AnyPtr: // Meeting to AnyPtrs
3336 break;
3337 case RawPtr: { // might be top, bot, any/not or constant
3338 enum PTR tptr = t->is_ptr()->ptr();
3339 enum PTR ptr = meet_ptr( tptr );
3340 if( ptr == Constant ) { // Cannot be equal constants, so...
3341 if( tptr == Constant && _ptr != Constant) return t;
3342 if( _ptr == Constant && tptr != Constant) return this;
3343 ptr = NotNull; // Fall down in lattice
3344 }
3345 return make( ptr );
3346 }
3347
3348 case OopPtr:
3349 case InstPtr:
3350 case AryPtr:
3351 case MetadataPtr:
3352 case KlassPtr:
3353 case InstKlassPtr:
3354 case AryKlassPtr:
3355 return TypePtr::BOTTOM; // Oop meet raw is not well defined
3356 default: // All else is a mistake
3357 typerr(t);
3358 }
3359
3360 // Found an AnyPtr type vs self-RawPtr type
3361 const TypePtr *tp = t->is_ptr();
3362 switch (tp->ptr()) {
3363 case TypePtr::TopPTR: return this;
3364 case TypePtr::BotPTR: return t;
3365 case TypePtr::Null:
3366 if( _ptr == TypePtr::TopPTR ) return t;
3367 return TypeRawPtr::BOTTOM;
3368 case TypePtr::NotNull: return TypePtr::make(AnyPtr, meet_ptr(TypePtr::NotNull), tp->meet_offset(0), tp->speculative(), tp->inline_depth());
3369 case TypePtr::AnyNull:
3370 if( _ptr == TypePtr::Constant) return this;
3371 return make( meet_ptr(TypePtr::AnyNull) );
3372 default: ShouldNotReachHere();
3373 }
3374 return this;
3375 }
3376
3377 //------------------------------xdual------------------------------------------
3378 // Dual: compute field-by-field dual
3379 const Type *TypeRawPtr::xdual() const {
3380 return new TypeRawPtr( dual_ptr(), _bits );
3381 }
3382
3383 //------------------------------add_offset-------------------------------------
3384 const TypePtr* TypeRawPtr::add_offset(intptr_t offset) const {
3385 if( offset == OffsetTop ) return BOTTOM; // Undefined offset-> undefined pointer
3386 if( offset == OffsetBot ) return BOTTOM; // Unknown offset-> unknown pointer
3387 if( offset == 0 ) return this; // No change
3388 switch (_ptr) {
3389 case TypePtr::TopPTR:
3390 case TypePtr::BotPTR:
3391 case TypePtr::NotNull:
3392 return this;
3393 case TypePtr::Constant: {
3394 uintptr_t bits = (uintptr_t)_bits;
3395 uintptr_t sum = bits + offset;
3396 if (( offset < 0 )
3397 ? ( sum > bits ) // Underflow?
3398 : ( sum < bits )) { // Overflow?
3399 return BOTTOM;
3400 } else if ( sum == 0 ) {
3401 return TypePtr::NULL_PTR;
3402 } else {
3403 return make( (address)sum );
3404 }
3405 }
3406 default: ShouldNotReachHere();
3407 }
3408 }
3409
3410 //------------------------------eq---------------------------------------------
3411 // Structural equality check for Type representations
3412 bool TypeRawPtr::eq( const Type *t ) const {
3413 const TypeRawPtr *a = (const TypeRawPtr*)t;
3414 return _bits == a->_bits && TypePtr::eq(t);
3415 }
3416
3417 //------------------------------hash-------------------------------------------
3418 // Type-specific hashing function.
3419 uint TypeRawPtr::hash(void) const {
3420 return (uint)(uintptr_t)_bits + (uint)TypePtr::hash();
3421 }
3422
3423 //------------------------------dump2------------------------------------------
3424 #ifndef PRODUCT
3425 void TypeRawPtr::dump2( Dict &d, uint depth, outputStream *st ) const {
3426 if( _ptr == Constant )
3427 st->print(INTPTR_FORMAT, p2i(_bits));
3428 else
3429 st->print("rawptr:%s", ptr_msg[_ptr]);
3430 }
3431 #endif
3432
3433 //=============================================================================
3434 // Convenience common pre-built type.
3435 const TypeOopPtr *TypeOopPtr::BOTTOM;
3436
3437 TypeInterfaces::TypeInterfaces(ciInstanceKlass** interfaces_base, int nb_interfaces)
3438 : Type(Interfaces), _interfaces(interfaces_base, nb_interfaces),
3439 _hash(0), _exact_klass(nullptr) {
3440 _interfaces.sort(compare);
3441 initialize();
3442 }
3443
3444 const TypeInterfaces* TypeInterfaces::make(GrowableArray<ciInstanceKlass*>* interfaces) {
3445 // hashcons() can only delete the last thing that was allocated: to
3446 // make sure all memory for the newly created TypeInterfaces can be
3447 // freed if an identical one exists, allocate space for the array of
3448 // interfaces right after the TypeInterfaces object so that they
3449 // form a contiguous piece of memory.
3450 int nb_interfaces = interfaces == nullptr ? 0 : interfaces->length();
3451 size_t total_size = sizeof(TypeInterfaces) + nb_interfaces * sizeof(ciInstanceKlass*);
3452
3453 void* allocated_mem = operator new(total_size);
3454 ciInstanceKlass** interfaces_base = (ciInstanceKlass**)((char*)allocated_mem + sizeof(TypeInterfaces));
3455 for (int i = 0; i < nb_interfaces; ++i) {
3456 interfaces_base[i] = interfaces->at(i);
3457 }
3458 TypeInterfaces* result = ::new (allocated_mem) TypeInterfaces(interfaces_base, nb_interfaces);
3459 return (const TypeInterfaces*)result->hashcons();
3460 }
3461
3462 void TypeInterfaces::initialize() {
3463 compute_hash();
3464 compute_exact_klass();
3465 DEBUG_ONLY(_initialized = true;)
3466 }
3467
3468 int TypeInterfaces::compare(ciInstanceKlass* const& k1, ciInstanceKlass* const& k2) {
3469 if ((intptr_t)k1 < (intptr_t)k2) {
3470 return -1;
3471 } else if ((intptr_t)k1 > (intptr_t)k2) {
3472 return 1;
3473 }
3474 return 0;
3475 }
3476
3477 int TypeInterfaces::compare(ciInstanceKlass** k1, ciInstanceKlass** k2) {
3478 return compare(*k1, *k2);
3479 }
3480
3481 bool TypeInterfaces::eq(const Type* t) const {
3482 const TypeInterfaces* other = (const TypeInterfaces*)t;
3483 if (_interfaces.length() != other->_interfaces.length()) {
3484 return false;
3485 }
3486 for (int i = 0; i < _interfaces.length(); i++) {
3487 ciKlass* k1 = _interfaces.at(i);
3488 ciKlass* k2 = other->_interfaces.at(i);
3489 if (!k1->equals(k2)) {
3490 return false;
3491 }
3492 }
3493 return true;
3494 }
3495
3496 bool TypeInterfaces::eq(ciInstanceKlass* k) const {
3497 assert(k->is_loaded(), "should be loaded");
3498 GrowableArray<ciInstanceKlass *>* interfaces = k->transitive_interfaces();
3499 if (_interfaces.length() != interfaces->length()) {
3500 return false;
3501 }
3502 for (int i = 0; i < interfaces->length(); i++) {
3503 bool found = false;
3504 _interfaces.find_sorted<ciInstanceKlass*, compare>(interfaces->at(i), found);
3505 if (!found) {
3506 return false;
3507 }
3508 }
3509 return true;
3510 }
3511
3512
3513 uint TypeInterfaces::hash() const {
3514 assert(_initialized, "must be");
3515 return _hash;
3516 }
3517
3518 const Type* TypeInterfaces::xdual() const {
3519 return this;
3520 }
3521
3522 void TypeInterfaces::compute_hash() {
3523 uint hash = 0;
3524 for (int i = 0; i < _interfaces.length(); i++) {
3525 ciKlass* k = _interfaces.at(i);
3526 hash += k->hash();
3527 }
3528 _hash = hash;
3529 }
3530
3531 static int compare_interfaces(ciInstanceKlass** k1, ciInstanceKlass** k2) {
3532 return (int)((*k1)->ident() - (*k2)->ident());
3533 }
3534
3535 void TypeInterfaces::dump(outputStream* st) const {
3536 if (_interfaces.length() == 0) {
3537 return;
3538 }
3539 ResourceMark rm;
3540 st->print(" (");
3541 GrowableArray<ciInstanceKlass*> interfaces;
3542 interfaces.appendAll(&_interfaces);
3543 // Sort the interfaces so they are listed in the same order from one run to the other of the same compilation
3544 interfaces.sort(compare_interfaces);
3545 for (int i = 0; i < interfaces.length(); i++) {
3546 if (i > 0) {
3547 st->print(",");
3548 }
3549 ciKlass* k = interfaces.at(i);
3550 k->print_name_on(st);
3551 }
3552 st->print(")");
3553 }
3554
3555 #ifdef ASSERT
3556 void TypeInterfaces::verify() const {
3557 for (int i = 1; i < _interfaces.length(); i++) {
3558 ciInstanceKlass* k1 = _interfaces.at(i-1);
3559 ciInstanceKlass* k2 = _interfaces.at(i);
3560 assert(compare(k2, k1) > 0, "should be ordered");
3561 assert(k1 != k2, "no duplicate");
3562 }
3563 }
3564 #endif
3565
3566 const TypeInterfaces* TypeInterfaces::union_with(const TypeInterfaces* other) const {
3567 GrowableArray<ciInstanceKlass*> result_list;
3568 int i = 0;
3569 int j = 0;
3570 while (i < _interfaces.length() || j < other->_interfaces.length()) {
3571 while (i < _interfaces.length() &&
3572 (j >= other->_interfaces.length() ||
3573 compare(_interfaces.at(i), other->_interfaces.at(j)) < 0)) {
3574 result_list.push(_interfaces.at(i));
3575 i++;
3576 }
3577 while (j < other->_interfaces.length() &&
3578 (i >= _interfaces.length() ||
3579 compare(other->_interfaces.at(j), _interfaces.at(i)) < 0)) {
3580 result_list.push(other->_interfaces.at(j));
3581 j++;
3582 }
3583 if (i < _interfaces.length() &&
3584 j < other->_interfaces.length() &&
3585 _interfaces.at(i) == other->_interfaces.at(j)) {
3586 result_list.push(_interfaces.at(i));
3587 i++;
3588 j++;
3589 }
3590 }
3591 const TypeInterfaces* result = TypeInterfaces::make(&result_list);
3592 #ifdef ASSERT
3593 result->verify();
3594 for (int i = 0; i < _interfaces.length(); i++) {
3595 assert(result->_interfaces.contains(_interfaces.at(i)), "missing");
3596 }
3597 for (int i = 0; i < other->_interfaces.length(); i++) {
3598 assert(result->_interfaces.contains(other->_interfaces.at(i)), "missing");
3599 }
3600 for (int i = 0; i < result->_interfaces.length(); i++) {
3601 assert(_interfaces.contains(result->_interfaces.at(i)) || other->_interfaces.contains(result->_interfaces.at(i)), "missing");
3602 }
3603 #endif
3604 return result;
3605 }
3606
3607 const TypeInterfaces* TypeInterfaces::intersection_with(const TypeInterfaces* other) const {
3608 GrowableArray<ciInstanceKlass*> result_list;
3609 int i = 0;
3610 int j = 0;
3611 while (i < _interfaces.length() || j < other->_interfaces.length()) {
3612 while (i < _interfaces.length() &&
3613 (j >= other->_interfaces.length() ||
3614 compare(_interfaces.at(i), other->_interfaces.at(j)) < 0)) {
3615 i++;
3616 }
3617 while (j < other->_interfaces.length() &&
3618 (i >= _interfaces.length() ||
3619 compare(other->_interfaces.at(j), _interfaces.at(i)) < 0)) {
3620 j++;
3621 }
3622 if (i < _interfaces.length() &&
3623 j < other->_interfaces.length() &&
3624 _interfaces.at(i) == other->_interfaces.at(j)) {
3625 result_list.push(_interfaces.at(i));
3626 i++;
3627 j++;
3628 }
3629 }
3630 const TypeInterfaces* result = TypeInterfaces::make(&result_list);
3631 #ifdef ASSERT
3632 result->verify();
3633 for (int i = 0; i < _interfaces.length(); i++) {
3634 assert(!other->_interfaces.contains(_interfaces.at(i)) || result->_interfaces.contains(_interfaces.at(i)), "missing");
3635 }
3636 for (int i = 0; i < other->_interfaces.length(); i++) {
3637 assert(!_interfaces.contains(other->_interfaces.at(i)) || result->_interfaces.contains(other->_interfaces.at(i)), "missing");
3638 }
3639 for (int i = 0; i < result->_interfaces.length(); i++) {
3640 assert(_interfaces.contains(result->_interfaces.at(i)) && other->_interfaces.contains(result->_interfaces.at(i)), "missing");
3641 }
3642 #endif
3643 return result;
3644 }
3645
3646 // Is there a single ciKlass* that can represent the interface set?
3647 ciInstanceKlass* TypeInterfaces::exact_klass() const {
3648 assert(_initialized, "must be");
3649 return _exact_klass;
3650 }
3651
3652 void TypeInterfaces::compute_exact_klass() {
3653 if (_interfaces.length() == 0) {
3654 _exact_klass = nullptr;
3655 return;
3656 }
3657 ciInstanceKlass* res = nullptr;
3658 for (int i = 0; i < _interfaces.length(); i++) {
3659 ciInstanceKlass* interface = _interfaces.at(i);
3660 if (eq(interface)) {
3661 assert(res == nullptr, "");
3662 res = interface;
3663 }
3664 }
3665 _exact_klass = res;
3666 }
3667
3668 #ifdef ASSERT
3669 void TypeInterfaces::verify_is_loaded() const {
3670 for (int i = 0; i < _interfaces.length(); i++) {
3671 ciKlass* interface = _interfaces.at(i);
3672 assert(interface->is_loaded(), "Interface not loaded");
3673 }
3674 }
3675 #endif
3676
3677 // Can't be implemented because there's no way to know if the type is above or below the center line.
3678 const Type* TypeInterfaces::xmeet(const Type* t) const {
3679 ShouldNotReachHere();
3680 return Type::xmeet(t);
3681 }
3682
3683 bool TypeInterfaces::singleton(void) const {
3684 ShouldNotReachHere();
3685 return Type::singleton();
3686 }
3687
3688 bool TypeInterfaces::has_non_array_interface() const {
3689 assert(TypeAryPtr::_array_interfaces != nullptr, "How come Type::Initialize_shared wasn't called yet?");
3690
3691 return !TypeAryPtr::_array_interfaces->contains(this);
3692 }
3693
3694 //------------------------------TypeOopPtr-------------------------------------
3695 TypeOopPtr::TypeOopPtr(TYPES t, PTR ptr, ciKlass* k, const TypeInterfaces* interfaces, bool xk, ciObject* o, int offset,
3696 int instance_id, const TypePtr* speculative, int inline_depth)
3697 : TypePtr(t, ptr, offset, speculative, inline_depth),
3698 _const_oop(o), _klass(k),
3699 _interfaces(interfaces),
3700 _klass_is_exact(xk),
3701 _is_ptr_to_narrowoop(false),
3702 _is_ptr_to_narrowklass(false),
3703 _is_ptr_to_boxed_value(false),
3704 _instance_id(instance_id) {
3705 #ifdef ASSERT
3706 if (klass() != nullptr && klass()->is_loaded()) {
3707 interfaces->verify_is_loaded();
3708 }
3709 #endif
3710 if (Compile::current()->eliminate_boxing() && (t == InstPtr) &&
3711 (offset > 0) && xk && (k != nullptr) && k->is_instance_klass()) {
3712 _is_ptr_to_boxed_value = k->as_instance_klass()->is_boxed_value_offset(offset);
3713 }
3714 #ifdef _LP64
3715 if (_offset > 0 || _offset == Type::OffsetTop || _offset == Type::OffsetBot) {
3716 if (_offset == Type::klass_offset()) {
3717 _is_ptr_to_narrowklass = UseCompressedClassPointers;
3718 } else if (klass() == nullptr) {
3719 // Array with unknown body type
3720 assert(this->isa_aryptr(), "only arrays without klass");
3721 _is_ptr_to_narrowoop = UseCompressedOops;
3722 } else if (this->isa_aryptr()) {
3723 _is_ptr_to_narrowoop = (UseCompressedOops && klass()->is_obj_array_klass() &&
3724 _offset != arrayOopDesc::length_offset_in_bytes());
3725 } else if (klass()->is_instance_klass()) {
3726 ciInstanceKlass* ik = klass()->as_instance_klass();
3727 if (this->isa_klassptr()) {
3728 // Perm objects don't use compressed references
3729 } else if (_offset == OffsetBot || _offset == OffsetTop) {
3730 // unsafe access
3731 _is_ptr_to_narrowoop = UseCompressedOops;
3732 } else {
3733 assert(this->isa_instptr(), "must be an instance ptr.");
3734
3735 if (klass() == ciEnv::current()->Class_klass() &&
3736 (_offset == java_lang_Class::klass_offset() ||
3737 _offset == java_lang_Class::array_klass_offset())) {
3738 // Special hidden fields from the Class.
3739 assert(this->isa_instptr(), "must be an instance ptr.");
3740 _is_ptr_to_narrowoop = false;
3741 } else if (klass() == ciEnv::current()->Class_klass() &&
3742 _offset >= InstanceMirrorKlass::offset_of_static_fields()) {
3743 // Static fields
3744 ciField* field = nullptr;
3745 if (const_oop() != nullptr) {
3746 ciInstanceKlass* k = const_oop()->as_instance()->java_lang_Class_klass()->as_instance_klass();
3747 field = k->get_field_by_offset(_offset, true);
3748 }
3749 if (field != nullptr) {
3750 BasicType basic_elem_type = field->layout_type();
3751 _is_ptr_to_narrowoop = UseCompressedOops && ::is_reference_type(basic_elem_type);
3752 } else {
3753 // unsafe access
3754 _is_ptr_to_narrowoop = UseCompressedOops;
3755 }
3756 } else {
3757 // Instance fields which contains a compressed oop references.
3758 ciField* field = ik->get_field_by_offset(_offset, false);
3759 if (field != nullptr) {
3760 BasicType basic_elem_type = field->layout_type();
3761 _is_ptr_to_narrowoop = UseCompressedOops && ::is_reference_type(basic_elem_type);
3762 } else if (klass()->equals(ciEnv::current()->Object_klass())) {
3763 // Compile::find_alias_type() cast exactness on all types to verify
3764 // that it does not affect alias type.
3765 _is_ptr_to_narrowoop = UseCompressedOops;
3766 } else {
3767 // Type for the copy start in LibraryCallKit::inline_native_clone().
3768 _is_ptr_to_narrowoop = UseCompressedOops;
3769 }
3770 }
3771 }
3772 }
3773 }
3774 #endif
3775 }
3776
3777 //------------------------------make-------------------------------------------
3778 const TypeOopPtr *TypeOopPtr::make(PTR ptr, int offset, int instance_id,
3779 const TypePtr* speculative, int inline_depth) {
3780 assert(ptr != Constant, "no constant generic pointers");
3781 ciKlass* k = Compile::current()->env()->Object_klass();
3782 bool xk = false;
3783 ciObject* o = nullptr;
3784 const TypeInterfaces* interfaces = TypeInterfaces::make();
3785 return (TypeOopPtr*)(new TypeOopPtr(OopPtr, ptr, k, interfaces, xk, o, offset, instance_id, speculative, inline_depth))->hashcons();
3786 }
3787
3788
3789 //------------------------------cast_to_ptr_type-------------------------------
3790 const TypeOopPtr* TypeOopPtr::cast_to_ptr_type(PTR ptr) const {
3791 assert(_base == OopPtr, "subclass must override cast_to_ptr_type");
3792 if( ptr == _ptr ) return this;
3793 return make(ptr, _offset, _instance_id, _speculative, _inline_depth);
3794 }
3795
3796 //-----------------------------cast_to_instance_id----------------------------
3797 const TypeOopPtr *TypeOopPtr::cast_to_instance_id(int instance_id) const {
3798 // There are no instances of a general oop.
3799 // Return self unchanged.
3800 return this;
3801 }
3802
3803 //-----------------------------cast_to_exactness-------------------------------
3804 const TypeOopPtr* TypeOopPtr::cast_to_exactness(bool klass_is_exact) const {
3805 // There is no such thing as an exact general oop.
3806 // Return self unchanged.
3807 return this;
3808 }
3809
3810
3811 //------------------------------as_klass_type----------------------------------
3812 // Return the klass type corresponding to this instance or array type.
3813 // It is the type that is loaded from an object of this type.
3814 const TypeKlassPtr* TypeOopPtr::as_klass_type(bool try_for_exact) const {
3815 ShouldNotReachHere();
3816 return nullptr;
3817 }
3818
3819 //------------------------------meet-------------------------------------------
3820 // Compute the MEET of two types. It returns a new Type object.
3821 const Type *TypeOopPtr::xmeet_helper(const Type *t) const {
3822 // Perform a fast test for common case; meeting the same types together.
3823 if( this == t ) return this; // Meeting same type-rep?
3824
3825 // Current "this->_base" is OopPtr
3826 switch (t->base()) { // switch on original type
3827
3828 case Int: // Mixing ints & oops happens when javac
3829 case Long: // reuses local variables
3830 case HalfFloatTop:
3831 case HalfFloatCon:
3832 case HalfFloatBot:
3833 case FloatTop:
3834 case FloatCon:
3835 case FloatBot:
3836 case DoubleTop:
3837 case DoubleCon:
3838 case DoubleBot:
3839 case NarrowOop:
3840 case NarrowKlass:
3841 case Bottom: // Ye Olde Default
3842 return Type::BOTTOM;
3843 case Top:
3844 return this;
3845
3846 default: // All else is a mistake
3847 typerr(t);
3848
3849 case RawPtr:
3850 case MetadataPtr:
3851 case KlassPtr:
3852 case InstKlassPtr:
3853 case AryKlassPtr:
3854 return TypePtr::BOTTOM; // Oop meet raw is not well defined
3855
3856 case AnyPtr: {
3857 // Found an AnyPtr type vs self-OopPtr type
3858 const TypePtr *tp = t->is_ptr();
3859 int offset = meet_offset(tp->offset());
3860 PTR ptr = meet_ptr(tp->ptr());
3861 const TypePtr* speculative = xmeet_speculative(tp);
3862 int depth = meet_inline_depth(tp->inline_depth());
3863 switch (tp->ptr()) {
3864 case Null:
3865 if (ptr == Null) return TypePtr::make(AnyPtr, ptr, offset, speculative, depth);
3866 // else fall through:
3867 case TopPTR:
3868 case AnyNull: {
3869 int instance_id = meet_instance_id(InstanceTop);
3870 return make(ptr, offset, instance_id, speculative, depth);
3871 }
3872 case BotPTR:
3873 case NotNull:
3874 return TypePtr::make(AnyPtr, ptr, offset, speculative, depth);
3875 default: typerr(t);
3876 }
3877 }
3878
3879 case OopPtr: { // Meeting to other OopPtrs
3880 const TypeOopPtr *tp = t->is_oopptr();
3881 int instance_id = meet_instance_id(tp->instance_id());
3882 const TypePtr* speculative = xmeet_speculative(tp);
3883 int depth = meet_inline_depth(tp->inline_depth());
3884 return make(meet_ptr(tp->ptr()), meet_offset(tp->offset()), instance_id, speculative, depth);
3885 }
3886
3887 case InstPtr: // For these, flip the call around to cut down
3888 case AryPtr:
3889 return t->xmeet(this); // Call in reverse direction
3890
3891 } // End of switch
3892 return this; // Return the double constant
3893 }
3894
3895
3896 //------------------------------xdual------------------------------------------
3897 // Dual of a pure heap pointer. No relevant klass or oop information.
3898 const Type *TypeOopPtr::xdual() const {
3899 assert(klass() == Compile::current()->env()->Object_klass(), "no klasses here");
3900 assert(const_oop() == nullptr, "no constants here");
3901 return new TypeOopPtr(_base, dual_ptr(), klass(), _interfaces, klass_is_exact(), const_oop(), dual_offset(), dual_instance_id(), dual_speculative(), dual_inline_depth());
3902 }
3903
3904 //--------------------------make_from_klass_common-----------------------------
3905 // Computes the element-type given a klass.
3906 const TypeOopPtr* TypeOopPtr::make_from_klass_common(ciKlass* klass, bool klass_change, bool try_for_exact, InterfaceHandling interface_handling) {
3907 if (klass->is_instance_klass()) {
3908 Compile* C = Compile::current();
3909 Dependencies* deps = C->dependencies();
3910 assert((deps != nullptr) == (C->method() != nullptr && C->method()->code_size() > 0), "sanity");
3911 // Element is an instance
3912 bool klass_is_exact = false;
3913 if (klass->is_loaded()) {
3914 // Try to set klass_is_exact.
3915 ciInstanceKlass* ik = klass->as_instance_klass();
3916 klass_is_exact = ik->is_final();
3917 if (!klass_is_exact && klass_change
3918 && deps != nullptr && UseUniqueSubclasses) {
3919 ciInstanceKlass* sub = ik->unique_concrete_subklass();
3920 if (sub != nullptr) {
3921 deps->assert_abstract_with_unique_concrete_subtype(ik, sub);
3922 klass = ik = sub;
3923 klass_is_exact = sub->is_final();
3924 }
3925 }
3926 if (!klass_is_exact && try_for_exact && deps != nullptr &&
3927 !ik->is_interface() && !ik->has_subklass()) {
3928 // Add a dependence; if concrete subclass added we need to recompile
3929 deps->assert_leaf_type(ik);
3930 klass_is_exact = true;
3931 }
3932 }
3933 const TypeInterfaces* interfaces = TypePtr::interfaces(klass, true, true, false, interface_handling);
3934 return TypeInstPtr::make(TypePtr::BotPTR, klass, interfaces, klass_is_exact, nullptr, 0);
3935 } else if (klass->is_obj_array_klass()) {
3936 // Element is an object array. Recursively call ourself.
3937 ciKlass* eklass = klass->as_obj_array_klass()->element_klass();
3938 const TypeOopPtr *etype = TypeOopPtr::make_from_klass_common(eklass, false, try_for_exact, interface_handling);
3939 bool xk = etype->klass_is_exact();
3940 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::POS);
3941 // We used to pass NotNull in here, asserting that the sub-arrays
3942 // are all not-null. This is not true in generally, as code can
3943 // slam nulls down in the subarrays.
3944 const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::BotPTR, arr0, nullptr, xk, 0);
3945 return arr;
3946 } else if (klass->is_type_array_klass()) {
3947 // Element is an typeArray
3948 const Type* etype = get_const_basic_type(klass->as_type_array_klass()->element_type());
3949 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::POS);
3950 // We used to pass NotNull in here, asserting that the array pointer
3951 // is not-null. That was not true in general.
3952 const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::BotPTR, arr0, klass, true, 0);
3953 return arr;
3954 } else {
3955 ShouldNotReachHere();
3956 return nullptr;
3957 }
3958 }
3959
3960 //------------------------------make_from_constant-----------------------------
3961 // Make a java pointer from an oop constant
3962 const TypeOopPtr* TypeOopPtr::make_from_constant(ciObject* o, bool require_constant) {
3963 assert(!o->is_null_object(), "null object not yet handled here.");
3964
3965 const bool make_constant = require_constant || o->should_be_constant();
3966
3967 ciKlass* klass = o->klass();
3968 if (klass->is_instance_klass()) {
3969 // Element is an instance
3970 if (make_constant) {
3971 return TypeInstPtr::make(o);
3972 } else {
3973 return TypeInstPtr::make(TypePtr::NotNull, klass, true, nullptr, 0);
3974 }
3975 } else if (klass->is_obj_array_klass()) {
3976 // Element is an object array. Recursively call ourself.
3977 const TypeOopPtr *etype =
3978 TypeOopPtr::make_from_klass_raw(klass->as_obj_array_klass()->element_klass(), trust_interfaces);
3979 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::make(o->as_array()->length()));
3980 // We used to pass NotNull in here, asserting that the sub-arrays
3981 // are all not-null. This is not true in generally, as code can
3982 // slam nulls down in the subarrays.
3983 if (make_constant) {
3984 return TypeAryPtr::make(TypePtr::Constant, o, arr0, klass, true, 0);
3985 } else {
3986 return TypeAryPtr::make(TypePtr::NotNull, arr0, klass, true, 0);
3987 }
3988 } else if (klass->is_type_array_klass()) {
3989 // Element is an typeArray
3990 const Type* etype =
3991 (Type*)get_const_basic_type(klass->as_type_array_klass()->element_type());
3992 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::make(o->as_array()->length()));
3993 // We used to pass NotNull in here, asserting that the array pointer
3994 // is not-null. That was not true in general.
3995 if (make_constant) {
3996 return TypeAryPtr::make(TypePtr::Constant, o, arr0, klass, true, 0);
3997 } else {
3998 return TypeAryPtr::make(TypePtr::NotNull, arr0, klass, true, 0);
3999 }
4000 }
4001
4002 fatal("unhandled object type");
4003 return nullptr;
4004 }
4005
4006 //------------------------------get_con----------------------------------------
4007 intptr_t TypeOopPtr::get_con() const {
4008 assert( _ptr == Null || _ptr == Constant, "" );
4009 assert( _offset >= 0, "" );
4010
4011 if (_offset != 0) {
4012 // After being ported to the compiler interface, the compiler no longer
4013 // directly manipulates the addresses of oops. Rather, it only has a pointer
4014 // to a handle at compile time. This handle is embedded in the generated
4015 // code and dereferenced at the time the nmethod is made. Until that time,
4016 // it is not reasonable to do arithmetic with the addresses of oops (we don't
4017 // have access to the addresses!). This does not seem to currently happen,
4018 // but this assertion here is to help prevent its occurrence.
4019 tty->print_cr("Found oop constant with non-zero offset");
4020 ShouldNotReachHere();
4021 }
4022
4023 return (intptr_t)const_oop()->constant_encoding();
4024 }
4025
4026
4027 //-----------------------------filter------------------------------------------
4028 // Do not allow interface-vs.-noninterface joins to collapse to top.
4029 const Type *TypeOopPtr::filter_helper(const Type *kills, bool include_speculative) const {
4030
4031 const Type* ft = join_helper(kills, include_speculative);
4032
4033 if (ft->empty()) {
4034 return Type::TOP; // Canonical empty value
4035 }
4036
4037 return ft;
4038 }
4039
4040 //------------------------------eq---------------------------------------------
4041 // Structural equality check for Type representations
4042 bool TypeOopPtr::eq( const Type *t ) const {
4043 const TypeOopPtr *a = (const TypeOopPtr*)t;
4044 if (_klass_is_exact != a->_klass_is_exact ||
4045 _instance_id != a->_instance_id) return false;
4046 ciObject* one = const_oop();
4047 ciObject* two = a->const_oop();
4048 if (one == nullptr || two == nullptr) {
4049 return (one == two) && TypePtr::eq(t);
4050 } else {
4051 return one->equals(two) && TypePtr::eq(t);
4052 }
4053 }
4054
4055 //------------------------------hash-------------------------------------------
4056 // Type-specific hashing function.
4057 uint TypeOopPtr::hash(void) const {
4058 return
4059 (uint)(const_oop() ? const_oop()->hash() : 0) +
4060 (uint)_klass_is_exact +
4061 (uint)_instance_id + TypePtr::hash();
4062 }
4063
4064 //------------------------------dump2------------------------------------------
4065 #ifndef PRODUCT
4066 void TypeOopPtr::dump2( Dict &d, uint depth, outputStream *st ) const {
4067 st->print("oopptr:%s", ptr_msg[_ptr]);
4068 if( _klass_is_exact ) st->print(":exact");
4069 if( const_oop() ) st->print(INTPTR_FORMAT, p2i(const_oop()));
4070 switch( _offset ) {
4071 case OffsetTop: st->print("+top"); break;
4072 case OffsetBot: st->print("+any"); break;
4073 case 0: break;
4074 default: st->print("+%d",_offset); break;
4075 }
4076 if (_instance_id == InstanceTop)
4077 st->print(",iid=top");
4078 else if (_instance_id != InstanceBot)
4079 st->print(",iid=%d",_instance_id);
4080
4081 dump_inline_depth(st);
4082 dump_speculative(st);
4083 }
4084 #endif
4085
4086 //------------------------------singleton--------------------------------------
4087 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
4088 // constants
4089 bool TypeOopPtr::singleton(void) const {
4090 // detune optimizer to not generate constant oop + constant offset as a constant!
4091 // TopPTR, Null, AnyNull, Constant are all singletons
4092 return (_offset == 0) && !below_centerline(_ptr);
4093 }
4094
4095 //------------------------------add_offset-------------------------------------
4096 const TypePtr* TypeOopPtr::add_offset(intptr_t offset) const {
4097 return make(_ptr, xadd_offset(offset), _instance_id, add_offset_speculative(offset), _inline_depth);
4098 }
4099
4100 const TypeOopPtr* TypeOopPtr::with_offset(intptr_t offset) const {
4101 return make(_ptr, offset, _instance_id, with_offset_speculative(offset), _inline_depth);
4102 }
4103
4104 /**
4105 * Return same type without a speculative part
4106 */
4107 const TypeOopPtr* TypeOopPtr::remove_speculative() const {
4108 if (_speculative == nullptr) {
4109 return this;
4110 }
4111 assert(_inline_depth == InlineDepthTop || _inline_depth == InlineDepthBottom, "non speculative type shouldn't have inline depth");
4112 return make(_ptr, _offset, _instance_id, nullptr, _inline_depth);
4113 }
4114
4115 /**
4116 * Return same type but drop speculative part if we know we won't use
4117 * it
4118 */
4119 const Type* TypeOopPtr::cleanup_speculative() const {
4120 // If the klass is exact and the ptr is not null then there's
4121 // nothing that the speculative type can help us with
4122 if (klass_is_exact() && !maybe_null()) {
4123 return remove_speculative();
4124 }
4125 return TypePtr::cleanup_speculative();
4126 }
4127
4128 /**
4129 * Return same type but with a different inline depth (used for speculation)
4130 *
4131 * @param depth depth to meet with
4132 */
4133 const TypePtr* TypeOopPtr::with_inline_depth(int depth) const {
4134 if (!UseInlineDepthForSpeculativeTypes) {
4135 return this;
4136 }
4137 return make(_ptr, _offset, _instance_id, _speculative, depth);
4138 }
4139
4140 //------------------------------with_instance_id--------------------------------
4141 const TypePtr* TypeOopPtr::with_instance_id(int instance_id) const {
4142 assert(_instance_id != -1, "should be known");
4143 return make(_ptr, _offset, instance_id, _speculative, _inline_depth);
4144 }
4145
4146 //------------------------------meet_instance_id--------------------------------
4147 int TypeOopPtr::meet_instance_id( int instance_id ) const {
4148 // Either is 'TOP' instance? Return the other instance!
4149 if( _instance_id == InstanceTop ) return instance_id;
4150 if( instance_id == InstanceTop ) return _instance_id;
4151 // If either is different, return 'BOTTOM' instance
4152 if( _instance_id != instance_id ) return InstanceBot;
4153 return _instance_id;
4154 }
4155
4156 //------------------------------dual_instance_id--------------------------------
4157 int TypeOopPtr::dual_instance_id( ) const {
4158 if( _instance_id == InstanceTop ) return InstanceBot; // Map TOP into BOTTOM
4159 if( _instance_id == InstanceBot ) return InstanceTop; // Map BOTTOM into TOP
4160 return _instance_id; // Map everything else into self
4161 }
4162
4163
4164 const TypeInterfaces* TypeOopPtr::meet_interfaces(const TypeOopPtr* other) const {
4165 if (above_centerline(_ptr) && above_centerline(other->_ptr)) {
4166 return _interfaces->union_with(other->_interfaces);
4167 } else if (above_centerline(_ptr) && !above_centerline(other->_ptr)) {
4168 return other->_interfaces;
4169 } else if (above_centerline(other->_ptr) && !above_centerline(_ptr)) {
4170 return _interfaces;
4171 }
4172 return _interfaces->intersection_with(other->_interfaces);
4173 }
4174
4175 /**
4176 * Check whether new profiling would improve speculative type
4177 *
4178 * @param exact_kls class from profiling
4179 * @param inline_depth inlining depth of profile point
4180 *
4181 * @return true if type profile is valuable
4182 */
4183 bool TypeOopPtr::would_improve_type(ciKlass* exact_kls, int inline_depth) const {
4184 // no way to improve an already exact type
4185 if (klass_is_exact()) {
4186 return false;
4187 }
4188 return TypePtr::would_improve_type(exact_kls, inline_depth);
4189 }
4190
4191 //=============================================================================
4192 // Convenience common pre-built types.
4193 const TypeInstPtr *TypeInstPtr::NOTNULL;
4194 const TypeInstPtr *TypeInstPtr::BOTTOM;
4195 const TypeInstPtr *TypeInstPtr::MIRROR;
4196 const TypeInstPtr *TypeInstPtr::MARK;
4197 const TypeInstPtr *TypeInstPtr::KLASS;
4198
4199 // Is there a single ciKlass* that can represent that type?
4200 ciKlass* TypeInstPtr::exact_klass_helper() const {
4201 if (_interfaces->empty()) {
4202 return _klass;
4203 }
4204 if (_klass != ciEnv::current()->Object_klass()) {
4205 if (_interfaces->eq(_klass->as_instance_klass())) {
4206 return _klass;
4207 }
4208 return nullptr;
4209 }
4210 return _interfaces->exact_klass();
4211 }
4212
4213 //------------------------------TypeInstPtr-------------------------------------
4214 TypeInstPtr::TypeInstPtr(PTR ptr, ciKlass* k, const TypeInterfaces* interfaces, bool xk, ciObject* o, int off,
4215 int instance_id, const TypePtr* speculative, int inline_depth)
4216 : TypeOopPtr(InstPtr, ptr, k, interfaces, xk, o, off, instance_id, speculative, inline_depth) {
4217 assert(k == nullptr || !k->is_loaded() || !k->is_interface(), "no interface here");
4218 assert(k != nullptr &&
4219 (k->is_loaded() || o == nullptr),
4220 "cannot have constants with non-loaded klass");
4221 };
4222
4223 //------------------------------make-------------------------------------------
4224 const TypeInstPtr *TypeInstPtr::make(PTR ptr,
4225 ciKlass* k,
4226 const TypeInterfaces* interfaces,
4227 bool xk,
4228 ciObject* o,
4229 int offset,
4230 int instance_id,
4231 const TypePtr* speculative,
4232 int inline_depth) {
4233 assert( !k->is_loaded() || k->is_instance_klass(), "Must be for instance");
4234 // Either const_oop() is null or else ptr is Constant
4235 assert( (!o && ptr != Constant) || (o && ptr == Constant),
4236 "constant pointers must have a value supplied" );
4237 // Ptr is never Null
4238 assert( ptr != Null, "null pointers are not typed" );
4239
4240 assert(instance_id <= 0 || xk, "instances are always exactly typed");
4241 if (ptr == Constant) {
4242 // Note: This case includes meta-object constants, such as methods.
4243 xk = true;
4244 } else if (k->is_loaded()) {
4245 ciInstanceKlass* ik = k->as_instance_klass();
4246 if (!xk && ik->is_final()) xk = true; // no inexact final klass
4247 assert(!ik->is_interface(), "no interface here");
4248 if (xk && ik->is_interface()) xk = false; // no exact interface
4249 }
4250
4251 // Now hash this baby
4252 TypeInstPtr *result =
4253 (TypeInstPtr*)(new TypeInstPtr(ptr, k, interfaces, xk, o ,offset, instance_id, speculative, inline_depth))->hashcons();
4254
4255 return result;
4256 }
4257
4258 const TypeInterfaces* TypePtr::interfaces(ciKlass*& k, bool klass, bool interface, bool array, InterfaceHandling interface_handling) {
4259 if (k->is_instance_klass()) {
4260 if (k->is_loaded()) {
4261 if (k->is_interface() && interface_handling == ignore_interfaces) {
4262 assert(interface, "no interface expected");
4263 k = ciEnv::current()->Object_klass();
4264 const TypeInterfaces* interfaces = TypeInterfaces::make();
4265 return interfaces;
4266 }
4267 GrowableArray<ciInstanceKlass *>* k_interfaces = k->as_instance_klass()->transitive_interfaces();
4268 const TypeInterfaces* interfaces = TypeInterfaces::make(k_interfaces);
4269 if (k->is_interface()) {
4270 assert(interface, "no interface expected");
4271 k = ciEnv::current()->Object_klass();
4272 } else {
4273 assert(klass, "no instance klass expected");
4274 }
4275 return interfaces;
4276 }
4277 const TypeInterfaces* interfaces = TypeInterfaces::make();
4278 return interfaces;
4279 }
4280 assert(array, "no array expected");
4281 assert(k->is_array_klass(), "Not an array?");
4282 ciType* e = k->as_array_klass()->base_element_type();
4283 if (e->is_loaded() && e->is_instance_klass() && e->as_instance_klass()->is_interface()) {
4284 if (interface_handling == ignore_interfaces) {
4285 k = ciObjArrayKlass::make(ciEnv::current()->Object_klass(), k->as_array_klass()->dimension());
4286 }
4287 }
4288 return TypeAryPtr::_array_interfaces;
4289 }
4290
4291 /**
4292 * Create constant type for a constant boxed value
4293 */
4294 const Type* TypeInstPtr::get_const_boxed_value() const {
4295 assert(is_ptr_to_boxed_value(), "should be called only for boxed value");
4296 assert((const_oop() != nullptr), "should be called only for constant object");
4297 ciConstant constant = const_oop()->as_instance()->field_value_by_offset(offset());
4298 BasicType bt = constant.basic_type();
4299 switch (bt) {
4300 case T_BOOLEAN: return TypeInt::make(constant.as_boolean());
4301 case T_INT: return TypeInt::make(constant.as_int());
4302 case T_CHAR: return TypeInt::make(constant.as_char());
4303 case T_BYTE: return TypeInt::make(constant.as_byte());
4304 case T_SHORT: return TypeInt::make(constant.as_short());
4305 case T_FLOAT: return TypeF::make(constant.as_float());
4306 case T_DOUBLE: return TypeD::make(constant.as_double());
4307 case T_LONG: return TypeLong::make(constant.as_long());
4308 default: break;
4309 }
4310 fatal("Invalid boxed value type '%s'", type2name(bt));
4311 return nullptr;
4312 }
4313
4314 //------------------------------cast_to_ptr_type-------------------------------
4315 const TypeInstPtr* TypeInstPtr::cast_to_ptr_type(PTR ptr) const {
4316 if( ptr == _ptr ) return this;
4317 // Reconstruct _sig info here since not a problem with later lazy
4318 // construction, _sig will show up on demand.
4319 return make(ptr, klass(), _interfaces, klass_is_exact(), ptr == Constant ? const_oop() : nullptr, _offset, _instance_id, _speculative, _inline_depth);
4320 }
4321
4322
4323 //-----------------------------cast_to_exactness-------------------------------
4324 const TypeInstPtr* TypeInstPtr::cast_to_exactness(bool klass_is_exact) const {
4325 if( klass_is_exact == _klass_is_exact ) return this;
4326 if (!_klass->is_loaded()) return this;
4327 ciInstanceKlass* ik = _klass->as_instance_klass();
4328 if( (ik->is_final() || _const_oop) ) return this; // cannot clear xk
4329 assert(!ik->is_interface(), "no interface here");
4330 return make(ptr(), klass(), _interfaces, klass_is_exact, const_oop(), _offset, _instance_id, _speculative, _inline_depth);
4331 }
4332
4333 //-----------------------------cast_to_instance_id----------------------------
4334 const TypeInstPtr* TypeInstPtr::cast_to_instance_id(int instance_id) const {
4335 if( instance_id == _instance_id ) return this;
4336 return make(_ptr, klass(), _interfaces, _klass_is_exact, const_oop(), _offset, instance_id, _speculative, _inline_depth);
4337 }
4338
4339 //------------------------------xmeet_unloaded---------------------------------
4340 // Compute the MEET of two InstPtrs when at least one is unloaded.
4341 // Assume classes are different since called after check for same name/class-loader
4342 const TypeInstPtr *TypeInstPtr::xmeet_unloaded(const TypeInstPtr *tinst, const TypeInterfaces* interfaces) const {
4343 int off = meet_offset(tinst->offset());
4344 PTR ptr = meet_ptr(tinst->ptr());
4345 int instance_id = meet_instance_id(tinst->instance_id());
4346 const TypePtr* speculative = xmeet_speculative(tinst);
4347 int depth = meet_inline_depth(tinst->inline_depth());
4348
4349 const TypeInstPtr *loaded = is_loaded() ? this : tinst;
4350 const TypeInstPtr *unloaded = is_loaded() ? tinst : this;
4351 if( loaded->klass()->equals(ciEnv::current()->Object_klass()) ) {
4352 //
4353 // Meet unloaded class with java/lang/Object
4354 //
4355 // Meet
4356 // | Unloaded Class
4357 // Object | TOP | AnyNull | Constant | NotNull | BOTTOM |
4358 // ===================================================================
4359 // TOP | ..........................Unloaded......................|
4360 // AnyNull | U-AN |................Unloaded......................|
4361 // Constant | ... O-NN .................................. | O-BOT |
4362 // NotNull | ... O-NN .................................. | O-BOT |
4363 // BOTTOM | ........................Object-BOTTOM ..................|
4364 //
4365 assert(loaded->ptr() != TypePtr::Null, "insanity check");
4366 //
4367 if (loaded->ptr() == TypePtr::TopPTR) { return unloaded->with_speculative(speculative); }
4368 else if (loaded->ptr() == TypePtr::AnyNull) { return make(ptr, unloaded->klass(), interfaces, false, nullptr, off, instance_id, speculative, depth); }
4369 else if (loaded->ptr() == TypePtr::BotPTR) { return TypeInstPtr::BOTTOM->with_speculative(speculative); }
4370 else if (loaded->ptr() == TypePtr::Constant || loaded->ptr() == TypePtr::NotNull) {
4371 if (unloaded->ptr() == TypePtr::BotPTR) { return TypeInstPtr::BOTTOM->with_speculative(speculative); }
4372 else { return TypeInstPtr::NOTNULL->with_speculative(speculative); }
4373 }
4374 else if (unloaded->ptr() == TypePtr::TopPTR) { return unloaded->with_speculative(speculative); }
4375
4376 return unloaded->cast_to_ptr_type(TypePtr::AnyNull)->is_instptr()->with_speculative(speculative);
4377 }
4378
4379 // Both are unloaded, not the same class, not Object
4380 // Or meet unloaded with a different loaded class, not java/lang/Object
4381 if (ptr != TypePtr::BotPTR) {
4382 return TypeInstPtr::NOTNULL->with_speculative(speculative);
4383 }
4384 return TypeInstPtr::BOTTOM->with_speculative(speculative);
4385 }
4386
4387
4388 //------------------------------meet-------------------------------------------
4389 // Compute the MEET of two types. It returns a new Type object.
4390 const Type *TypeInstPtr::xmeet_helper(const Type *t) const {
4391 // Perform a fast test for common case; meeting the same types together.
4392 if( this == t ) return this; // Meeting same type-rep?
4393
4394 // Current "this->_base" is Pointer
4395 switch (t->base()) { // switch on original type
4396
4397 case Int: // Mixing ints & oops happens when javac
4398 case Long: // reuses local variables
4399 case HalfFloatTop:
4400 case HalfFloatCon:
4401 case HalfFloatBot:
4402 case FloatTop:
4403 case FloatCon:
4404 case FloatBot:
4405 case DoubleTop:
4406 case DoubleCon:
4407 case DoubleBot:
4408 case NarrowOop:
4409 case NarrowKlass:
4410 case Bottom: // Ye Olde Default
4411 return Type::BOTTOM;
4412 case Top:
4413 return this;
4414
4415 default: // All else is a mistake
4416 typerr(t);
4417
4418 case MetadataPtr:
4419 case KlassPtr:
4420 case InstKlassPtr:
4421 case AryKlassPtr:
4422 case RawPtr: return TypePtr::BOTTOM;
4423
4424 case AryPtr: { // All arrays inherit from Object class
4425 // Call in reverse direction to avoid duplication
4426 return t->is_aryptr()->xmeet_helper(this);
4427 }
4428
4429 case OopPtr: { // Meeting to OopPtrs
4430 // Found a OopPtr type vs self-InstPtr type
4431 const TypeOopPtr *tp = t->is_oopptr();
4432 int offset = meet_offset(tp->offset());
4433 PTR ptr = meet_ptr(tp->ptr());
4434 switch (tp->ptr()) {
4435 case TopPTR:
4436 case AnyNull: {
4437 int instance_id = meet_instance_id(InstanceTop);
4438 const TypePtr* speculative = xmeet_speculative(tp);
4439 int depth = meet_inline_depth(tp->inline_depth());
4440 return make(ptr, klass(), _interfaces, klass_is_exact(),
4441 (ptr == Constant ? const_oop() : nullptr), offset, instance_id, speculative, depth);
4442 }
4443 case NotNull:
4444 case BotPTR: {
4445 int instance_id = meet_instance_id(tp->instance_id());
4446 const TypePtr* speculative = xmeet_speculative(tp);
4447 int depth = meet_inline_depth(tp->inline_depth());
4448 return TypeOopPtr::make(ptr, offset, instance_id, speculative, depth);
4449 }
4450 default: typerr(t);
4451 }
4452 }
4453
4454 case AnyPtr: { // Meeting to AnyPtrs
4455 // Found an AnyPtr type vs self-InstPtr type
4456 const TypePtr *tp = t->is_ptr();
4457 int offset = meet_offset(tp->offset());
4458 PTR ptr = meet_ptr(tp->ptr());
4459 int instance_id = meet_instance_id(InstanceTop);
4460 const TypePtr* speculative = xmeet_speculative(tp);
4461 int depth = meet_inline_depth(tp->inline_depth());
4462 switch (tp->ptr()) {
4463 case Null:
4464 if( ptr == Null ) return TypePtr::make(AnyPtr, ptr, offset, speculative, depth);
4465 // else fall through to AnyNull
4466 case TopPTR:
4467 case AnyNull: {
4468 return make(ptr, klass(), _interfaces, klass_is_exact(),
4469 (ptr == Constant ? const_oop() : nullptr), offset, instance_id, speculative, depth);
4470 }
4471 case NotNull:
4472 case BotPTR:
4473 return TypePtr::make(AnyPtr, ptr, offset, speculative,depth);
4474 default: typerr(t);
4475 }
4476 }
4477
4478 /*
4479 A-top }
4480 / | \ } Tops
4481 B-top A-any C-top }
4482 | / | \ | } Any-nulls
4483 B-any | C-any }
4484 | | |
4485 B-con A-con C-con } constants; not comparable across classes
4486 | | |
4487 B-not | C-not }
4488 | \ | / | } not-nulls
4489 B-bot A-not C-bot }
4490 \ | / } Bottoms
4491 A-bot }
4492 */
4493
4494 case InstPtr: { // Meeting 2 Oops?
4495 // Found an InstPtr sub-type vs self-InstPtr type
4496 const TypeInstPtr *tinst = t->is_instptr();
4497 int off = meet_offset(tinst->offset());
4498 PTR ptr = meet_ptr(tinst->ptr());
4499 int instance_id = meet_instance_id(tinst->instance_id());
4500 const TypePtr* speculative = xmeet_speculative(tinst);
4501 int depth = meet_inline_depth(tinst->inline_depth());
4502 const TypeInterfaces* interfaces = meet_interfaces(tinst);
4503
4504 ciKlass* tinst_klass = tinst->klass();
4505 ciKlass* this_klass = klass();
4506
4507 ciKlass* res_klass = nullptr;
4508 bool res_xk = false;
4509 const Type* res;
4510 MeetResult kind = meet_instptr(ptr, interfaces, this, tinst, res_klass, res_xk);
4511
4512 if (kind == UNLOADED) {
4513 // One of these classes has not been loaded
4514 const TypeInstPtr* unloaded_meet = xmeet_unloaded(tinst, interfaces);
4515 #ifndef PRODUCT
4516 if (PrintOpto && Verbose) {
4517 tty->print("meet of unloaded classes resulted in: ");
4518 unloaded_meet->dump();
4519 tty->cr();
4520 tty->print(" this == ");
4521 dump();
4522 tty->cr();
4523 tty->print(" tinst == ");
4524 tinst->dump();
4525 tty->cr();
4526 }
4527 #endif
4528 res = unloaded_meet;
4529 } else {
4530 if (kind == NOT_SUBTYPE && instance_id > 0) {
4531 instance_id = InstanceBot;
4532 } else if (kind == LCA) {
4533 instance_id = InstanceBot;
4534 }
4535 ciObject* o = nullptr; // Assume not constant when done
4536 ciObject* this_oop = const_oop();
4537 ciObject* tinst_oop = tinst->const_oop();
4538 if (ptr == Constant) {
4539 if (this_oop != nullptr && tinst_oop != nullptr &&
4540 this_oop->equals(tinst_oop))
4541 o = this_oop;
4542 else if (above_centerline(_ptr)) {
4543 assert(!tinst_klass->is_interface(), "");
4544 o = tinst_oop;
4545 } else if (above_centerline(tinst->_ptr)) {
4546 assert(!this_klass->is_interface(), "");
4547 o = this_oop;
4548 } else
4549 ptr = NotNull;
4550 }
4551 res = make(ptr, res_klass, interfaces, res_xk, o, off, instance_id, speculative, depth);
4552 }
4553
4554 return res;
4555
4556 } // End of case InstPtr
4557
4558 } // End of switch
4559 return this; // Return the double constant
4560 }
4561
4562 template<class T> TypePtr::MeetResult TypePtr::meet_instptr(PTR& ptr, const TypeInterfaces*& interfaces, const T* this_type, const T* other_type,
4563 ciKlass*& res_klass, bool& res_xk) {
4564 ciKlass* this_klass = this_type->klass();
4565 ciKlass* other_klass = other_type->klass();
4566 bool this_xk = this_type->klass_is_exact();
4567 bool other_xk = other_type->klass_is_exact();
4568 PTR this_ptr = this_type->ptr();
4569 PTR other_ptr = other_type->ptr();
4570 const TypeInterfaces* this_interfaces = this_type->interfaces();
4571 const TypeInterfaces* other_interfaces = other_type->interfaces();
4572 // Check for easy case; klasses are equal (and perhaps not loaded!)
4573 // If we have constants, then we created oops so classes are loaded
4574 // and we can handle the constants further down. This case handles
4575 // both-not-loaded or both-loaded classes
4576 if (ptr != Constant && this_klass->equals(other_klass) && this_xk == other_xk) {
4577 res_klass = this_klass;
4578 res_xk = this_xk;
4579 return QUICK;
4580 }
4581
4582 // Classes require inspection in the Java klass hierarchy. Must be loaded.
4583 if (!other_klass->is_loaded() || !this_klass->is_loaded()) {
4584 return UNLOADED;
4585 }
4586
4587 // !!! Here's how the symmetry requirement breaks down into invariants:
4588 // If we split one up & one down AND they subtype, take the down man.
4589 // If we split one up & one down AND they do NOT subtype, "fall hard".
4590 // If both are up and they subtype, take the subtype class.
4591 // If both are up and they do NOT subtype, "fall hard".
4592 // If both are down and they subtype, take the supertype class.
4593 // If both are down and they do NOT subtype, "fall hard".
4594 // Constants treated as down.
4595
4596 // Now, reorder the above list; observe that both-down+subtype is also
4597 // "fall hard"; "fall hard" becomes the default case:
4598 // If we split one up & one down AND they subtype, take the down man.
4599 // If both are up and they subtype, take the subtype class.
4600
4601 // If both are down and they subtype, "fall hard".
4602 // If both are down and they do NOT subtype, "fall hard".
4603 // If both are up and they do NOT subtype, "fall hard".
4604 // If we split one up & one down AND they do NOT subtype, "fall hard".
4605
4606 // If a proper subtype is exact, and we return it, we return it exactly.
4607 // If a proper supertype is exact, there can be no subtyping relationship!
4608 // If both types are equal to the subtype, exactness is and-ed below the
4609 // centerline and or-ed above it. (N.B. Constants are always exact.)
4610
4611 // Check for subtyping:
4612 const T* subtype = nullptr;
4613 bool subtype_exact = false;
4614 if (this_type->is_same_java_type_as(other_type)) {
4615 subtype = this_type;
4616 subtype_exact = below_centerline(ptr) ? (this_xk && other_xk) : (this_xk || other_xk);
4617 } else if (!other_xk && this_type->is_meet_subtype_of(other_type)) {
4618 subtype = this_type; // Pick subtyping class
4619 subtype_exact = this_xk;
4620 } else if(!this_xk && other_type->is_meet_subtype_of(this_type)) {
4621 subtype = other_type; // Pick subtyping class
4622 subtype_exact = other_xk;
4623 }
4624
4625 if (subtype) {
4626 if (above_centerline(ptr)) { // both are up?
4627 this_type = other_type = subtype;
4628 this_xk = other_xk = subtype_exact;
4629 } else if (above_centerline(this_ptr) && !above_centerline(other_ptr)) {
4630 this_type = other_type; // tinst is down; keep down man
4631 this_xk = other_xk;
4632 } else if (above_centerline(other_ptr) && !above_centerline(this_ptr)) {
4633 other_type = this_type; // this is down; keep down man
4634 other_xk = this_xk;
4635 } else {
4636 this_xk = subtype_exact; // either they are equal, or we'll do an LCA
4637 }
4638 }
4639
4640 // Check for classes now being equal
4641 if (this_type->is_same_java_type_as(other_type)) {
4642 // If the klasses are equal, the constants may still differ. Fall to
4643 // NotNull if they do (neither constant is null; that is a special case
4644 // handled elsewhere).
4645 res_klass = this_type->klass();
4646 res_xk = this_xk;
4647 return SUBTYPE;
4648 } // Else classes are not equal
4649
4650 // Since klasses are different, we require a LCA in the Java
4651 // class hierarchy - which means we have to fall to at least NotNull.
4652 if (ptr == TopPTR || ptr == AnyNull || ptr == Constant) {
4653 ptr = NotNull;
4654 }
4655
4656 interfaces = this_interfaces->intersection_with(other_interfaces);
4657
4658 // Now we find the LCA of Java classes
4659 ciKlass* k = this_klass->least_common_ancestor(other_klass);
4660
4661 res_klass = k;
4662 res_xk = false;
4663
4664 return LCA;
4665 }
4666
4667 //------------------------java_mirror_type--------------------------------------
4668 ciType* TypeInstPtr::java_mirror_type() const {
4669 // must be a singleton type
4670 if( const_oop() == nullptr ) return nullptr;
4671
4672 // must be of type java.lang.Class
4673 if( klass() != ciEnv::current()->Class_klass() ) return nullptr;
4674
4675 return const_oop()->as_instance()->java_mirror_type();
4676 }
4677
4678
4679 //------------------------------xdual------------------------------------------
4680 // Dual: do NOT dual on klasses. This means I do NOT understand the Java
4681 // inheritance mechanism.
4682 const Type *TypeInstPtr::xdual() const {
4683 return new TypeInstPtr(dual_ptr(), klass(), _interfaces, klass_is_exact(), const_oop(), dual_offset(), dual_instance_id(), dual_speculative(), dual_inline_depth());
4684 }
4685
4686 //------------------------------eq---------------------------------------------
4687 // Structural equality check for Type representations
4688 bool TypeInstPtr::eq( const Type *t ) const {
4689 const TypeInstPtr *p = t->is_instptr();
4690 return
4691 klass()->equals(p->klass()) &&
4692 _interfaces->eq(p->_interfaces) &&
4693 TypeOopPtr::eq(p); // Check sub-type stuff
4694 }
4695
4696 //------------------------------hash-------------------------------------------
4697 // Type-specific hashing function.
4698 uint TypeInstPtr::hash(void) const {
4699 return klass()->hash() + TypeOopPtr::hash() + _interfaces->hash();
4700 }
4701
4702 bool TypeInstPtr::is_java_subtype_of_helper(const TypeOopPtr* other, bool this_exact, bool other_exact) const {
4703 return TypePtr::is_java_subtype_of_helper_for_instance(this, other, this_exact, other_exact);
4704 }
4705
4706
4707 bool TypeInstPtr::is_same_java_type_as_helper(const TypeOopPtr* other) const {
4708 return TypePtr::is_same_java_type_as_helper_for_instance(this, other);
4709 }
4710
4711 bool TypeInstPtr::maybe_java_subtype_of_helper(const TypeOopPtr* other, bool this_exact, bool other_exact) const {
4712 return TypePtr::maybe_java_subtype_of_helper_for_instance(this, other, this_exact, other_exact);
4713 }
4714
4715
4716 //------------------------------dump2------------------------------------------
4717 // Dump oop Type
4718 #ifndef PRODUCT
4719 void TypeInstPtr::dump2(Dict &d, uint depth, outputStream* st) const {
4720 // Print the name of the klass.
4721 klass()->print_name_on(st);
4722 _interfaces->dump(st);
4723
4724 switch( _ptr ) {
4725 case Constant:
4726 if (WizardMode || Verbose) {
4727 ResourceMark rm;
4728 stringStream ss;
4729
4730 st->print(" ");
4731 const_oop()->print_oop(&ss);
4732 // 'const_oop->print_oop()' may emit newlines('\n') into ss.
4733 // suppress newlines from it so -XX:+Verbose -XX:+PrintIdeal dumps one-liner for each node.
4734 char* buf = ss.as_string(/* c_heap= */false);
4735 StringUtils::replace_no_expand(buf, "\n", "");
4736 st->print_raw(buf);
4737 }
4738 case BotPTR:
4739 if (!WizardMode && !Verbose) {
4740 if( _klass_is_exact ) st->print(":exact");
4741 break;
4742 }
4743 case TopPTR:
4744 case AnyNull:
4745 case NotNull:
4746 st->print(":%s", ptr_msg[_ptr]);
4747 if( _klass_is_exact ) st->print(":exact");
4748 break;
4749 default:
4750 break;
4751 }
4752
4753 if( _offset ) { // Dump offset, if any
4754 if( _offset == OffsetBot ) st->print("+any");
4755 else if( _offset == OffsetTop ) st->print("+unknown");
4756 else st->print("+%d", _offset);
4757 }
4758
4759 st->print(" *");
4760 if (_instance_id == InstanceTop)
4761 st->print(",iid=top");
4762 else if (_instance_id != InstanceBot)
4763 st->print(",iid=%d",_instance_id);
4764
4765 dump_inline_depth(st);
4766 dump_speculative(st);
4767 }
4768 #endif
4769
4770 //------------------------------add_offset-------------------------------------
4771 const TypePtr* TypeInstPtr::add_offset(intptr_t offset) const {
4772 return make(_ptr, klass(), _interfaces, klass_is_exact(), const_oop(), xadd_offset(offset),
4773 _instance_id, add_offset_speculative(offset), _inline_depth);
4774 }
4775
4776 const TypeInstPtr* TypeInstPtr::with_offset(intptr_t offset) const {
4777 return make(_ptr, klass(), _interfaces, klass_is_exact(), const_oop(), offset,
4778 _instance_id, with_offset_speculative(offset), _inline_depth);
4779 }
4780
4781 const TypeInstPtr* TypeInstPtr::remove_speculative() const {
4782 if (_speculative == nullptr) {
4783 return this;
4784 }
4785 assert(_inline_depth == InlineDepthTop || _inline_depth == InlineDepthBottom, "non speculative type shouldn't have inline depth");
4786 return make(_ptr, klass(), _interfaces, klass_is_exact(), const_oop(), _offset,
4787 _instance_id, nullptr, _inline_depth);
4788 }
4789
4790 const TypeInstPtr* TypeInstPtr::with_speculative(const TypePtr* speculative) const {
4791 return make(_ptr, klass(), _interfaces, klass_is_exact(), const_oop(), _offset, _instance_id, speculative, _inline_depth);
4792 }
4793
4794 const TypePtr* TypeInstPtr::with_inline_depth(int depth) const {
4795 if (!UseInlineDepthForSpeculativeTypes) {
4796 return this;
4797 }
4798 return make(_ptr, klass(), _interfaces, klass_is_exact(), const_oop(), _offset, _instance_id, _speculative, depth);
4799 }
4800
4801 const TypePtr* TypeInstPtr::with_instance_id(int instance_id) const {
4802 assert(is_known_instance(), "should be known");
4803 return make(_ptr, klass(), _interfaces, klass_is_exact(), const_oop(), _offset, instance_id, _speculative, _inline_depth);
4804 }
4805
4806 const TypeKlassPtr* TypeInstPtr::as_klass_type(bool try_for_exact) const {
4807 bool xk = klass_is_exact();
4808 ciInstanceKlass* ik = klass()->as_instance_klass();
4809 if (try_for_exact && !xk && !ik->has_subklass() && !ik->is_final()) {
4810 if (_interfaces->eq(ik)) {
4811 Compile* C = Compile::current();
4812 Dependencies* deps = C->dependencies();
4813 deps->assert_leaf_type(ik);
4814 xk = true;
4815 }
4816 }
4817 return TypeInstKlassPtr::make(xk ? TypePtr::Constant : TypePtr::NotNull, klass(), _interfaces, 0);
4818 }
4819
4820 template <class T1, class T2> bool TypePtr::is_meet_subtype_of_helper_for_instance(const T1* this_one, const T2* other, bool this_xk, bool other_xk) {
4821 static_assert(std::is_base_of<T2, T1>::value, "");
4822
4823 if (!this_one->is_instance_type(other)) {
4824 return false;
4825 }
4826
4827 if (other->klass() == ciEnv::current()->Object_klass() && other->_interfaces->empty()) {
4828 return true;
4829 }
4830
4831 return this_one->klass()->is_subtype_of(other->klass()) &&
4832 (!this_xk || this_one->_interfaces->contains(other->_interfaces));
4833 }
4834
4835
4836 bool TypeInstPtr::is_meet_subtype_of_helper(const TypeOopPtr *other, bool this_xk, bool other_xk) const {
4837 return TypePtr::is_meet_subtype_of_helper_for_instance(this, other, this_xk, other_xk);
4838 }
4839
4840 template <class T1, class T2> bool TypePtr::is_meet_subtype_of_helper_for_array(const T1* this_one, const T2* other, bool this_xk, bool other_xk) {
4841 static_assert(std::is_base_of<T2, T1>::value, "");
4842 if (other->klass() == ciEnv::current()->Object_klass() && other->_interfaces->empty()) {
4843 return true;
4844 }
4845
4846 if (this_one->is_instance_type(other)) {
4847 return other->klass() == ciEnv::current()->Object_klass() && this_one->_interfaces->contains(other->_interfaces);
4848 }
4849
4850 int dummy;
4851 bool this_top_or_bottom = (this_one->base_element_type(dummy) == Type::TOP || this_one->base_element_type(dummy) == Type::BOTTOM);
4852 if (this_top_or_bottom) {
4853 return false;
4854 }
4855
4856 const T1* other_ary = this_one->is_array_type(other);
4857 const TypePtr* other_elem = other_ary->elem()->make_ptr();
4858 const TypePtr* this_elem = this_one->elem()->make_ptr();
4859 if (other_elem != nullptr && this_elem != nullptr) {
4860 return this_one->is_reference_type(this_elem)->is_meet_subtype_of_helper(this_one->is_reference_type(other_elem), this_xk, other_xk);
4861 }
4862
4863 if (other_elem == nullptr && this_elem == nullptr) {
4864 return this_one->klass()->is_subtype_of(other->klass());
4865 }
4866
4867 return false;
4868 }
4869
4870 bool TypeAryPtr::is_meet_subtype_of_helper(const TypeOopPtr *other, bool this_xk, bool other_xk) const {
4871 return TypePtr::is_meet_subtype_of_helper_for_array(this, other, this_xk, other_xk);
4872 }
4873
4874 bool TypeInstKlassPtr::is_meet_subtype_of_helper(const TypeKlassPtr *other, bool this_xk, bool other_xk) const {
4875 return TypePtr::is_meet_subtype_of_helper_for_instance(this, other, this_xk, other_xk);
4876 }
4877
4878 bool TypeAryKlassPtr::is_meet_subtype_of_helper(const TypeKlassPtr *other, bool this_xk, bool other_xk) const {
4879 return TypePtr::is_meet_subtype_of_helper_for_array(this, other, this_xk, other_xk);
4880 }
4881
4882 //=============================================================================
4883 // Convenience common pre-built types.
4884 const TypeAryPtr* TypeAryPtr::BOTTOM;
4885 const TypeAryPtr* TypeAryPtr::RANGE;
4886 const TypeAryPtr* TypeAryPtr::OOPS;
4887 const TypeAryPtr* TypeAryPtr::NARROWOOPS;
4888 const TypeAryPtr* TypeAryPtr::BYTES;
4889 const TypeAryPtr* TypeAryPtr::SHORTS;
4890 const TypeAryPtr* TypeAryPtr::CHARS;
4891 const TypeAryPtr* TypeAryPtr::INTS;
4892 const TypeAryPtr* TypeAryPtr::LONGS;
4893 const TypeAryPtr* TypeAryPtr::FLOATS;
4894 const TypeAryPtr* TypeAryPtr::DOUBLES;
4895
4896 //------------------------------make-------------------------------------------
4897 const TypeAryPtr *TypeAryPtr::make(PTR ptr, const TypeAry *ary, ciKlass* k, bool xk, int offset,
4898 int instance_id, const TypePtr* speculative, int inline_depth) {
4899 assert(!(k == nullptr && ary->_elem->isa_int()),
4900 "integral arrays must be pre-equipped with a class");
4901 if (!xk) xk = ary->ary_must_be_exact();
4902 assert(instance_id <= 0 || xk, "instances are always exactly typed");
4903 if (k != nullptr && k->is_loaded() && k->is_obj_array_klass() &&
4904 k->as_obj_array_klass()->base_element_klass()->is_interface()) {
4905 k = nullptr;
4906 }
4907 return (TypeAryPtr*)(new TypeAryPtr(ptr, nullptr, ary, k, xk, offset, instance_id, false, speculative, inline_depth))->hashcons();
4908 }
4909
4910 //------------------------------make-------------------------------------------
4911 const TypeAryPtr *TypeAryPtr::make(PTR ptr, ciObject* o, const TypeAry *ary, ciKlass* k, bool xk, int offset,
4912 int instance_id, const TypePtr* speculative, int inline_depth,
4913 bool is_autobox_cache) {
4914 assert(!(k == nullptr && ary->_elem->isa_int()),
4915 "integral arrays must be pre-equipped with a class");
4916 assert( (ptr==Constant && o) || (ptr!=Constant && !o), "" );
4917 if (!xk) xk = (o != nullptr) || ary->ary_must_be_exact();
4918 assert(instance_id <= 0 || xk, "instances are always exactly typed");
4919 if (k != nullptr && k->is_loaded() && k->is_obj_array_klass() &&
4920 k->as_obj_array_klass()->base_element_klass()->is_interface()) {
4921 k = nullptr;
4922 }
4923 return (TypeAryPtr*)(new TypeAryPtr(ptr, o, ary, k, xk, offset, instance_id, is_autobox_cache, speculative, inline_depth))->hashcons();
4924 }
4925
4926 //------------------------------cast_to_ptr_type-------------------------------
4927 const TypeAryPtr* TypeAryPtr::cast_to_ptr_type(PTR ptr) const {
4928 if( ptr == _ptr ) return this;
4929 return make(ptr, ptr == Constant ? const_oop() : nullptr, _ary, klass(), klass_is_exact(), _offset, _instance_id, _speculative, _inline_depth);
4930 }
4931
4932
4933 //-----------------------------cast_to_exactness-------------------------------
4934 const TypeAryPtr* TypeAryPtr::cast_to_exactness(bool klass_is_exact) const {
4935 if( klass_is_exact == _klass_is_exact ) return this;
4936 if (_ary->ary_must_be_exact()) return this; // cannot clear xk
4937 return make(ptr(), const_oop(), _ary, klass(), klass_is_exact, _offset, _instance_id, _speculative, _inline_depth);
4938 }
4939
4940 //-----------------------------cast_to_instance_id----------------------------
4941 const TypeAryPtr* TypeAryPtr::cast_to_instance_id(int instance_id) const {
4942 if( instance_id == _instance_id ) return this;
4943 return make(_ptr, const_oop(), _ary, klass(), _klass_is_exact, _offset, instance_id, _speculative, _inline_depth);
4944 }
4945
4946
4947 //-----------------------------max_array_length-------------------------------
4948 // A wrapper around arrayOopDesc::max_array_length(etype) with some input normalization.
4949 jint TypeAryPtr::max_array_length(BasicType etype) {
4950 if (!is_java_primitive(etype) && !::is_reference_type(etype)) {
4951 if (etype == T_NARROWOOP) {
4952 etype = T_OBJECT;
4953 } else if (etype == T_ILLEGAL) { // bottom[]
4954 etype = T_BYTE; // will produce conservatively high value
4955 } else {
4956 fatal("not an element type: %s", type2name(etype));
4957 }
4958 }
4959 return arrayOopDesc::max_array_length(etype);
4960 }
4961
4962 //-----------------------------narrow_size_type-------------------------------
4963 // Narrow the given size type to the index range for the given array base type.
4964 // Return null if the resulting int type becomes empty.
4965 const TypeInt* TypeAryPtr::narrow_size_type(const TypeInt* size) const {
4966 jint hi = size->_hi;
4967 jint lo = size->_lo;
4968 jint min_lo = 0;
4969 jint max_hi = max_array_length(elem()->array_element_basic_type());
4970 //if (index_not_size) --max_hi; // type of a valid array index, FTR
4971 bool chg = false;
4972 if (lo < min_lo) {
4973 lo = min_lo;
4974 if (size->is_con()) {
4975 hi = lo;
4976 }
4977 chg = true;
4978 }
4979 if (hi > max_hi) {
4980 hi = max_hi;
4981 if (size->is_con()) {
4982 lo = hi;
4983 }
4984 chg = true;
4985 }
4986 // Negative length arrays will produce weird intermediate dead fast-path code
4987 if (lo > hi)
4988 return TypeInt::ZERO;
4989 if (!chg)
4990 return size;
4991 return TypeInt::make(lo, hi, Type::WidenMin);
4992 }
4993
4994 //-------------------------------cast_to_size----------------------------------
4995 const TypeAryPtr* TypeAryPtr::cast_to_size(const TypeInt* new_size) const {
4996 assert(new_size != nullptr, "");
4997 new_size = narrow_size_type(new_size);
4998 if (new_size == size()) return this;
4999 const TypeAry* new_ary = TypeAry::make(elem(), new_size, is_stable());
5000 return make(ptr(), const_oop(), new_ary, klass(), klass_is_exact(), _offset, _instance_id, _speculative, _inline_depth);
5001 }
5002
5003 //------------------------------cast_to_stable---------------------------------
5004 const TypeAryPtr* TypeAryPtr::cast_to_stable(bool stable, int stable_dimension) const {
5005 if (stable_dimension <= 0 || (stable_dimension == 1 && stable == this->is_stable()))
5006 return this;
5007
5008 const Type* elem = this->elem();
5009 const TypePtr* elem_ptr = elem->make_ptr();
5010
5011 if (stable_dimension > 1 && elem_ptr != nullptr && elem_ptr->isa_aryptr()) {
5012 // If this is widened from a narrow oop, TypeAry::make will re-narrow it.
5013 elem = elem_ptr = elem_ptr->is_aryptr()->cast_to_stable(stable, stable_dimension - 1);
5014 }
5015
5016 const TypeAry* new_ary = TypeAry::make(elem, size(), stable);
5017
5018 return make(ptr(), const_oop(), new_ary, klass(), klass_is_exact(), _offset, _instance_id, _speculative, _inline_depth);
5019 }
5020
5021 //-----------------------------stable_dimension--------------------------------
5022 int TypeAryPtr::stable_dimension() const {
5023 if (!is_stable()) return 0;
5024 int dim = 1;
5025 const TypePtr* elem_ptr = elem()->make_ptr();
5026 if (elem_ptr != nullptr && elem_ptr->isa_aryptr())
5027 dim += elem_ptr->is_aryptr()->stable_dimension();
5028 return dim;
5029 }
5030
5031 //----------------------cast_to_autobox_cache-----------------------------------
5032 const TypeAryPtr* TypeAryPtr::cast_to_autobox_cache() const {
5033 if (is_autobox_cache()) return this;
5034 const TypeOopPtr* etype = elem()->make_oopptr();
5035 if (etype == nullptr) return this;
5036 // The pointers in the autobox arrays are always non-null.
5037 etype = etype->cast_to_ptr_type(TypePtr::NotNull)->is_oopptr();
5038 const TypeAry* new_ary = TypeAry::make(etype, size(), is_stable());
5039 return make(ptr(), const_oop(), new_ary, klass(), klass_is_exact(), _offset, _instance_id, _speculative, _inline_depth, /*is_autobox_cache=*/true);
5040 }
5041
5042 //------------------------------eq---------------------------------------------
5043 // Structural equality check for Type representations
5044 bool TypeAryPtr::eq( const Type *t ) const {
5045 const TypeAryPtr *p = t->is_aryptr();
5046 return
5047 _ary == p->_ary && // Check array
5048 TypeOopPtr::eq(p); // Check sub-parts
5049 }
5050
5051 //------------------------------hash-------------------------------------------
5052 // Type-specific hashing function.
5053 uint TypeAryPtr::hash(void) const {
5054 return (uint)(uintptr_t)_ary + TypeOopPtr::hash();
5055 }
5056
5057 bool TypeAryPtr::is_java_subtype_of_helper(const TypeOopPtr* other, bool this_exact, bool other_exact) const {
5058 return TypePtr::is_java_subtype_of_helper_for_array(this, other, this_exact, other_exact);
5059 }
5060
5061 bool TypeAryPtr::is_same_java_type_as_helper(const TypeOopPtr* other) const {
5062 return TypePtr::is_same_java_type_as_helper_for_array(this, other);
5063 }
5064
5065 bool TypeAryPtr::maybe_java_subtype_of_helper(const TypeOopPtr* other, bool this_exact, bool other_exact) const {
5066 return TypePtr::maybe_java_subtype_of_helper_for_array(this, other, this_exact, other_exact);
5067 }
5068 //------------------------------meet-------------------------------------------
5069 // Compute the MEET of two types. It returns a new Type object.
5070 const Type *TypeAryPtr::xmeet_helper(const Type *t) const {
5071 // Perform a fast test for common case; meeting the same types together.
5072 if( this == t ) return this; // Meeting same type-rep?
5073 // Current "this->_base" is Pointer
5074 switch (t->base()) { // switch on original type
5075
5076 // Mixing ints & oops happens when javac reuses local variables
5077 case Int:
5078 case Long:
5079 case HalfFloatTop:
5080 case HalfFloatCon:
5081 case HalfFloatBot:
5082 case FloatTop:
5083 case FloatCon:
5084 case FloatBot:
5085 case DoubleTop:
5086 case DoubleCon:
5087 case DoubleBot:
5088 case NarrowOop:
5089 case NarrowKlass:
5090 case Bottom: // Ye Olde Default
5091 return Type::BOTTOM;
5092 case Top:
5093 return this;
5094
5095 default: // All else is a mistake
5096 typerr(t);
5097
5098 case OopPtr: { // Meeting to OopPtrs
5099 // Found a OopPtr type vs self-AryPtr type
5100 const TypeOopPtr *tp = t->is_oopptr();
5101 int offset = meet_offset(tp->offset());
5102 PTR ptr = meet_ptr(tp->ptr());
5103 int depth = meet_inline_depth(tp->inline_depth());
5104 const TypePtr* speculative = xmeet_speculative(tp);
5105 switch (tp->ptr()) {
5106 case TopPTR:
5107 case AnyNull: {
5108 int instance_id = meet_instance_id(InstanceTop);
5109 return make(ptr, (ptr == Constant ? const_oop() : nullptr),
5110 _ary, _klass, _klass_is_exact, offset, instance_id, speculative, depth);
5111 }
5112 case BotPTR:
5113 case NotNull: {
5114 int instance_id = meet_instance_id(tp->instance_id());
5115 return TypeOopPtr::make(ptr, offset, instance_id, speculative, depth);
5116 }
5117 default: ShouldNotReachHere();
5118 }
5119 }
5120
5121 case AnyPtr: { // Meeting two AnyPtrs
5122 // Found an AnyPtr type vs self-AryPtr type
5123 const TypePtr *tp = t->is_ptr();
5124 int offset = meet_offset(tp->offset());
5125 PTR ptr = meet_ptr(tp->ptr());
5126 const TypePtr* speculative = xmeet_speculative(tp);
5127 int depth = meet_inline_depth(tp->inline_depth());
5128 switch (tp->ptr()) {
5129 case TopPTR:
5130 return this;
5131 case BotPTR:
5132 case NotNull:
5133 return TypePtr::make(AnyPtr, ptr, offset, speculative, depth);
5134 case Null:
5135 if( ptr == Null ) return TypePtr::make(AnyPtr, ptr, offset, speculative, depth);
5136 // else fall through to AnyNull
5137 case AnyNull: {
5138 int instance_id = meet_instance_id(InstanceTop);
5139 return make(ptr, (ptr == Constant ? const_oop() : nullptr),
5140 _ary, _klass, _klass_is_exact, offset, instance_id, speculative, depth);
5141 }
5142 default: ShouldNotReachHere();
5143 }
5144 }
5145
5146 case MetadataPtr:
5147 case KlassPtr:
5148 case InstKlassPtr:
5149 case AryKlassPtr:
5150 case RawPtr: return TypePtr::BOTTOM;
5151
5152 case AryPtr: { // Meeting 2 references?
5153 const TypeAryPtr *tap = t->is_aryptr();
5154 int off = meet_offset(tap->offset());
5155 const TypeAry *tary = _ary->meet_speculative(tap->_ary)->is_ary();
5156 PTR ptr = meet_ptr(tap->ptr());
5157 int instance_id = meet_instance_id(tap->instance_id());
5158 const TypePtr* speculative = xmeet_speculative(tap);
5159 int depth = meet_inline_depth(tap->inline_depth());
5160
5161 ciKlass* res_klass = nullptr;
5162 bool res_xk = false;
5163 const Type* elem = tary->_elem;
5164 if (meet_aryptr(ptr, elem, this, tap, res_klass, res_xk) == NOT_SUBTYPE) {
5165 instance_id = InstanceBot;
5166 }
5167
5168 ciObject* o = nullptr; // Assume not constant when done
5169 ciObject* this_oop = const_oop();
5170 ciObject* tap_oop = tap->const_oop();
5171 if (ptr == Constant) {
5172 if (this_oop != nullptr && tap_oop != nullptr &&
5173 this_oop->equals(tap_oop)) {
5174 o = tap_oop;
5175 } else if (above_centerline(_ptr)) {
5176 o = tap_oop;
5177 } else if (above_centerline(tap->_ptr)) {
5178 o = this_oop;
5179 } else {
5180 ptr = NotNull;
5181 }
5182 }
5183 return make(ptr, o, TypeAry::make(elem, tary->_size, tary->_stable), res_klass, res_xk, off, instance_id, speculative, depth);
5184 }
5185
5186 // All arrays inherit from Object class
5187 case InstPtr: {
5188 const TypeInstPtr *tp = t->is_instptr();
5189 int offset = meet_offset(tp->offset());
5190 PTR ptr = meet_ptr(tp->ptr());
5191 int instance_id = meet_instance_id(tp->instance_id());
5192 const TypePtr* speculative = xmeet_speculative(tp);
5193 int depth = meet_inline_depth(tp->inline_depth());
5194 const TypeInterfaces* interfaces = meet_interfaces(tp);
5195 const TypeInterfaces* tp_interfaces = tp->_interfaces;
5196 const TypeInterfaces* this_interfaces = _interfaces;
5197
5198 switch (ptr) {
5199 case TopPTR:
5200 case AnyNull: // Fall 'down' to dual of object klass
5201 // For instances when a subclass meets a superclass we fall
5202 // below the centerline when the superclass is exact. We need to
5203 // do the same here.
5204 if (tp->klass()->equals(ciEnv::current()->Object_klass()) && this_interfaces->contains(tp_interfaces) && !tp->klass_is_exact()) {
5205 return TypeAryPtr::make(ptr, _ary, _klass, _klass_is_exact, offset, instance_id, speculative, depth);
5206 } else {
5207 // cannot subclass, so the meet has to fall badly below the centerline
5208 ptr = NotNull;
5209 instance_id = InstanceBot;
5210 interfaces = this_interfaces->intersection_with(tp_interfaces);
5211 return TypeInstPtr::make(ptr, ciEnv::current()->Object_klass(), interfaces, false, nullptr,offset, instance_id, speculative, depth);
5212 }
5213 case Constant:
5214 case NotNull:
5215 case BotPTR: // Fall down to object klass
5216 // LCA is object_klass, but if we subclass from the top we can do better
5217 if (above_centerline(tp->ptr())) {
5218 // If 'tp' is above the centerline and it is Object class
5219 // then we can subclass in the Java class hierarchy.
5220 // For instances when a subclass meets a superclass we fall
5221 // below the centerline when the superclass is exact. We need
5222 // to do the same here.
5223 if (tp->klass()->equals(ciEnv::current()->Object_klass()) && this_interfaces->contains(tp_interfaces) && !tp->klass_is_exact()) {
5224 // that is, my array type is a subtype of 'tp' klass
5225 return make(ptr, (ptr == Constant ? const_oop() : nullptr),
5226 _ary, _klass, _klass_is_exact, offset, instance_id, speculative, depth);
5227 }
5228 }
5229 // The other case cannot happen, since t cannot be a subtype of an array.
5230 // The meet falls down to Object class below centerline.
5231 if (ptr == Constant) {
5232 ptr = NotNull;
5233 }
5234 if (instance_id > 0) {
5235 instance_id = InstanceBot;
5236 }
5237 interfaces = this_interfaces->intersection_with(tp_interfaces);
5238 return TypeInstPtr::make(ptr, ciEnv::current()->Object_klass(), interfaces, false, nullptr, offset, instance_id, speculative, depth);
5239 default: typerr(t);
5240 }
5241 }
5242 }
5243 return this; // Lint noise
5244 }
5245
5246
5247 template<class T> TypePtr::MeetResult TypePtr::meet_aryptr(PTR& ptr, const Type*& elem, const T* this_ary,
5248 const T* other_ary, ciKlass*& res_klass, bool& res_xk) {
5249 int dummy;
5250 bool this_top_or_bottom = (this_ary->base_element_type(dummy) == Type::TOP || this_ary->base_element_type(dummy) == Type::BOTTOM);
5251 bool other_top_or_bottom = (other_ary->base_element_type(dummy) == Type::TOP || other_ary->base_element_type(dummy) == Type::BOTTOM);
5252 ciKlass* this_klass = this_ary->klass();
5253 ciKlass* other_klass = other_ary->klass();
5254 bool this_xk = this_ary->klass_is_exact();
5255 bool other_xk = other_ary->klass_is_exact();
5256 PTR this_ptr = this_ary->ptr();
5257 PTR other_ptr = other_ary->ptr();
5258 res_klass = nullptr;
5259 MeetResult result = SUBTYPE;
5260 if (elem->isa_int()) {
5261 // Integral array element types have irrelevant lattice relations.
5262 // It is the klass that determines array layout, not the element type.
5263 if (this_top_or_bottom)
5264 res_klass = other_klass;
5265 else if (other_top_or_bottom || other_klass == this_klass) {
5266 res_klass = this_klass;
5267 } else {
5268 // Something like byte[int+] meets char[int+].
5269 // This must fall to bottom, not (int[-128..65535])[int+].
5270 // instance_id = InstanceBot;
5271 elem = Type::BOTTOM;
5272 result = NOT_SUBTYPE;
5273 if (above_centerline(ptr) || ptr == Constant) {
5274 ptr = NotNull;
5275 res_xk = false;
5276 return NOT_SUBTYPE;
5277 }
5278 }
5279 } else {// Non integral arrays.
5280 // Must fall to bottom if exact klasses in upper lattice
5281 // are not equal or super klass is exact.
5282 if ((above_centerline(ptr) || ptr == Constant) && !this_ary->is_same_java_type_as(other_ary) &&
5283 // meet with top[] and bottom[] are processed further down:
5284 !this_top_or_bottom && !other_top_or_bottom &&
5285 // both are exact and not equal:
5286 ((other_xk && this_xk) ||
5287 // 'tap' is exact and super or unrelated:
5288 (other_xk && !other_ary->is_meet_subtype_of(this_ary)) ||
5289 // 'this' is exact and super or unrelated:
5290 (this_xk && !this_ary->is_meet_subtype_of(other_ary)))) {
5291 if (above_centerline(ptr) || (elem->make_ptr() && above_centerline(elem->make_ptr()->_ptr))) {
5292 elem = Type::BOTTOM;
5293 }
5294 ptr = NotNull;
5295 res_xk = false;
5296 return NOT_SUBTYPE;
5297 }
5298 }
5299
5300 res_xk = false;
5301 switch (other_ptr) {
5302 case AnyNull:
5303 case TopPTR:
5304 // Compute new klass on demand, do not use tap->_klass
5305 if (below_centerline(this_ptr)) {
5306 res_xk = this_xk;
5307 } else {
5308 res_xk = (other_xk || this_xk);
5309 }
5310 return result;
5311 case Constant: {
5312 if (this_ptr == Constant) {
5313 res_xk = true;
5314 } else if(above_centerline(this_ptr)) {
5315 res_xk = true;
5316 } else {
5317 // Only precise for identical arrays
5318 res_xk = this_xk && (this_ary->is_same_java_type_as(other_ary) || (this_top_or_bottom && other_top_or_bottom));
5319 }
5320 return result;
5321 }
5322 case NotNull:
5323 case BotPTR:
5324 // Compute new klass on demand, do not use tap->_klass
5325 if (above_centerline(this_ptr)) {
5326 res_xk = other_xk;
5327 } else {
5328 res_xk = (other_xk && this_xk) &&
5329 (this_ary->is_same_java_type_as(other_ary) || (this_top_or_bottom && other_top_or_bottom)); // Only precise for identical arrays
5330 }
5331 return result;
5332 default: {
5333 ShouldNotReachHere();
5334 return result;
5335 }
5336 }
5337 return result;
5338 }
5339
5340
5341 //------------------------------xdual------------------------------------------
5342 // Dual: compute field-by-field dual
5343 const Type *TypeAryPtr::xdual() const {
5344 return new TypeAryPtr(dual_ptr(), _const_oop, _ary->dual()->is_ary(),_klass, _klass_is_exact, dual_offset(), dual_instance_id(), is_autobox_cache(), dual_speculative(), dual_inline_depth());
5345 }
5346
5347 //------------------------------dump2------------------------------------------
5348 #ifndef PRODUCT
5349 void TypeAryPtr::dump2( Dict &d, uint depth, outputStream *st ) const {
5350 _ary->dump2(d,depth,st);
5351 _interfaces->dump(st);
5352
5353 switch( _ptr ) {
5354 case Constant:
5355 const_oop()->print(st);
5356 break;
5357 case BotPTR:
5358 if (!WizardMode && !Verbose) {
5359 if( _klass_is_exact ) st->print(":exact");
5360 break;
5361 }
5362 case TopPTR:
5363 case AnyNull:
5364 case NotNull:
5365 st->print(":%s", ptr_msg[_ptr]);
5366 if( _klass_is_exact ) st->print(":exact");
5367 break;
5368 default:
5369 break;
5370 }
5371
5372 if( _offset != 0 ) {
5373 BasicType basic_elem_type = elem()->basic_type();
5374 int header_size = arrayOopDesc::base_offset_in_bytes(basic_elem_type);
5375 if( _offset == OffsetTop ) st->print("+undefined");
5376 else if( _offset == OffsetBot ) st->print("+any");
5377 else if( _offset < header_size ) st->print("+%d", _offset);
5378 else {
5379 if (basic_elem_type == T_ILLEGAL) {
5380 st->print("+any");
5381 } else {
5382 int elem_size = type2aelembytes(basic_elem_type);
5383 st->print("[%d]", (_offset - header_size)/elem_size);
5384 }
5385 }
5386 }
5387 st->print(" *");
5388 if (_instance_id == InstanceTop)
5389 st->print(",iid=top");
5390 else if (_instance_id != InstanceBot)
5391 st->print(",iid=%d",_instance_id);
5392
5393 dump_inline_depth(st);
5394 dump_speculative(st);
5395 }
5396 #endif
5397
5398 bool TypeAryPtr::empty(void) const {
5399 if (_ary->empty()) return true;
5400 return TypeOopPtr::empty();
5401 }
5402
5403 //------------------------------add_offset-------------------------------------
5404 const TypePtr* TypeAryPtr::add_offset(intptr_t offset) const {
5405 return make(_ptr, _const_oop, _ary, _klass, _klass_is_exact, xadd_offset(offset), _instance_id, add_offset_speculative(offset), _inline_depth);
5406 }
5407
5408 const TypeAryPtr* TypeAryPtr::with_offset(intptr_t offset) const {
5409 return make(_ptr, _const_oop, _ary, _klass, _klass_is_exact, offset, _instance_id, with_offset_speculative(offset), _inline_depth);
5410 }
5411
5412 const TypeAryPtr* TypeAryPtr::with_ary(const TypeAry* ary) const {
5413 return make(_ptr, _const_oop, ary, _klass, _klass_is_exact, _offset, _instance_id, _speculative, _inline_depth);
5414 }
5415
5416 const TypeAryPtr* TypeAryPtr::remove_speculative() const {
5417 if (_speculative == nullptr) {
5418 return this;
5419 }
5420 assert(_inline_depth == InlineDepthTop || _inline_depth == InlineDepthBottom, "non speculative type shouldn't have inline depth");
5421 return make(_ptr, _const_oop, _ary->remove_speculative()->is_ary(), _klass, _klass_is_exact, _offset, _instance_id, nullptr, _inline_depth);
5422 }
5423
5424 const TypePtr* TypeAryPtr::with_inline_depth(int depth) const {
5425 if (!UseInlineDepthForSpeculativeTypes) {
5426 return this;
5427 }
5428 return make(_ptr, _const_oop, _ary->remove_speculative()->is_ary(), _klass, _klass_is_exact, _offset, _instance_id, _speculative, depth);
5429 }
5430
5431 const TypePtr* TypeAryPtr::with_instance_id(int instance_id) const {
5432 assert(is_known_instance(), "should be known");
5433 return make(_ptr, _const_oop, _ary->remove_speculative()->is_ary(), _klass, _klass_is_exact, _offset, instance_id, _speculative, _inline_depth);
5434 }
5435
5436 //=============================================================================
5437
5438 //------------------------------hash-------------------------------------------
5439 // Type-specific hashing function.
5440 uint TypeNarrowPtr::hash(void) const {
5441 return _ptrtype->hash() + 7;
5442 }
5443
5444 bool TypeNarrowPtr::singleton(void) const { // TRUE if type is a singleton
5445 return _ptrtype->singleton();
5446 }
5447
5448 bool TypeNarrowPtr::empty(void) const {
5449 return _ptrtype->empty();
5450 }
5451
5452 intptr_t TypeNarrowPtr::get_con() const {
5453 return _ptrtype->get_con();
5454 }
5455
5456 bool TypeNarrowPtr::eq( const Type *t ) const {
5457 const TypeNarrowPtr* tc = isa_same_narrowptr(t);
5458 if (tc != nullptr) {
5459 if (_ptrtype->base() != tc->_ptrtype->base()) {
5460 return false;
5461 }
5462 return tc->_ptrtype->eq(_ptrtype);
5463 }
5464 return false;
5465 }
5466
5467 const Type *TypeNarrowPtr::xdual() const { // Compute dual right now.
5468 const TypePtr* odual = _ptrtype->dual()->is_ptr();
5469 return make_same_narrowptr(odual);
5470 }
5471
5472
5473 const Type *TypeNarrowPtr::filter_helper(const Type *kills, bool include_speculative) const {
5474 if (isa_same_narrowptr(kills)) {
5475 const Type* ft =_ptrtype->filter_helper(is_same_narrowptr(kills)->_ptrtype, include_speculative);
5476 if (ft->empty())
5477 return Type::TOP; // Canonical empty value
5478 if (ft->isa_ptr()) {
5479 return make_hash_same_narrowptr(ft->isa_ptr());
5480 }
5481 return ft;
5482 } else if (kills->isa_ptr()) {
5483 const Type* ft = _ptrtype->join_helper(kills, include_speculative);
5484 if (ft->empty())
5485 return Type::TOP; // Canonical empty value
5486 return ft;
5487 } else {
5488 return Type::TOP;
5489 }
5490 }
5491
5492 //------------------------------xmeet------------------------------------------
5493 // Compute the MEET of two types. It returns a new Type object.
5494 const Type *TypeNarrowPtr::xmeet( const Type *t ) const {
5495 // Perform a fast test for common case; meeting the same types together.
5496 if( this == t ) return this; // Meeting same type-rep?
5497
5498 if (t->base() == base()) {
5499 const Type* result = _ptrtype->xmeet(t->make_ptr());
5500 if (result->isa_ptr()) {
5501 return make_hash_same_narrowptr(result->is_ptr());
5502 }
5503 return result;
5504 }
5505
5506 // Current "this->_base" is NarrowKlass or NarrowOop
5507 switch (t->base()) { // switch on original type
5508
5509 case Int: // Mixing ints & oops happens when javac
5510 case Long: // reuses local variables
5511 case HalfFloatTop:
5512 case HalfFloatCon:
5513 case HalfFloatBot:
5514 case FloatTop:
5515 case FloatCon:
5516 case FloatBot:
5517 case DoubleTop:
5518 case DoubleCon:
5519 case DoubleBot:
5520 case AnyPtr:
5521 case RawPtr:
5522 case OopPtr:
5523 case InstPtr:
5524 case AryPtr:
5525 case MetadataPtr:
5526 case KlassPtr:
5527 case InstKlassPtr:
5528 case AryKlassPtr:
5529 case NarrowOop:
5530 case NarrowKlass:
5531
5532 case Bottom: // Ye Olde Default
5533 return Type::BOTTOM;
5534 case Top:
5535 return this;
5536
5537 default: // All else is a mistake
5538 typerr(t);
5539
5540 } // End of switch
5541
5542 return this;
5543 }
5544
5545 #ifndef PRODUCT
5546 void TypeNarrowPtr::dump2( Dict & d, uint depth, outputStream *st ) const {
5547 _ptrtype->dump2(d, depth, st);
5548 }
5549 #endif
5550
5551 const TypeNarrowOop *TypeNarrowOop::BOTTOM;
5552 const TypeNarrowOop *TypeNarrowOop::NULL_PTR;
5553
5554
5555 const TypeNarrowOop* TypeNarrowOop::make(const TypePtr* type) {
5556 return (const TypeNarrowOop*)(new TypeNarrowOop(type))->hashcons();
5557 }
5558
5559 const TypeNarrowOop* TypeNarrowOop::remove_speculative() const {
5560 return make(_ptrtype->remove_speculative()->is_ptr());
5561 }
5562
5563 const Type* TypeNarrowOop::cleanup_speculative() const {
5564 return make(_ptrtype->cleanup_speculative()->is_ptr());
5565 }
5566
5567 #ifndef PRODUCT
5568 void TypeNarrowOop::dump2( Dict & d, uint depth, outputStream *st ) const {
5569 st->print("narrowoop: ");
5570 TypeNarrowPtr::dump2(d, depth, st);
5571 }
5572 #endif
5573
5574 const TypeNarrowKlass *TypeNarrowKlass::NULL_PTR;
5575
5576 const TypeNarrowKlass* TypeNarrowKlass::make(const TypePtr* type) {
5577 return (const TypeNarrowKlass*)(new TypeNarrowKlass(type))->hashcons();
5578 }
5579
5580 #ifndef PRODUCT
5581 void TypeNarrowKlass::dump2( Dict & d, uint depth, outputStream *st ) const {
5582 st->print("narrowklass: ");
5583 TypeNarrowPtr::dump2(d, depth, st);
5584 }
5585 #endif
5586
5587
5588 //------------------------------eq---------------------------------------------
5589 // Structural equality check for Type representations
5590 bool TypeMetadataPtr::eq( const Type *t ) const {
5591 const TypeMetadataPtr *a = (const TypeMetadataPtr*)t;
5592 ciMetadata* one = metadata();
5593 ciMetadata* two = a->metadata();
5594 if (one == nullptr || two == nullptr) {
5595 return (one == two) && TypePtr::eq(t);
5596 } else {
5597 return one->equals(two) && TypePtr::eq(t);
5598 }
5599 }
5600
5601 //------------------------------hash-------------------------------------------
5602 // Type-specific hashing function.
5603 uint TypeMetadataPtr::hash(void) const {
5604 return
5605 (metadata() ? metadata()->hash() : 0) +
5606 TypePtr::hash();
5607 }
5608
5609 //------------------------------singleton--------------------------------------
5610 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
5611 // constants
5612 bool TypeMetadataPtr::singleton(void) const {
5613 // detune optimizer to not generate constant metadata + constant offset as a constant!
5614 // TopPTR, Null, AnyNull, Constant are all singletons
5615 return (_offset == 0) && !below_centerline(_ptr);
5616 }
5617
5618 //------------------------------add_offset-------------------------------------
5619 const TypePtr* TypeMetadataPtr::add_offset( intptr_t offset ) const {
5620 return make( _ptr, _metadata, xadd_offset(offset));
5621 }
5622
5623 //-----------------------------filter------------------------------------------
5624 // Do not allow interface-vs.-noninterface joins to collapse to top.
5625 const Type *TypeMetadataPtr::filter_helper(const Type *kills, bool include_speculative) const {
5626 const TypeMetadataPtr* ft = join_helper(kills, include_speculative)->isa_metadataptr();
5627 if (ft == nullptr || ft->empty())
5628 return Type::TOP; // Canonical empty value
5629 return ft;
5630 }
5631
5632 //------------------------------get_con----------------------------------------
5633 intptr_t TypeMetadataPtr::get_con() const {
5634 assert( _ptr == Null || _ptr == Constant, "" );
5635 assert( _offset >= 0, "" );
5636
5637 if (_offset != 0) {
5638 // After being ported to the compiler interface, the compiler no longer
5639 // directly manipulates the addresses of oops. Rather, it only has a pointer
5640 // to a handle at compile time. This handle is embedded in the generated
5641 // code and dereferenced at the time the nmethod is made. Until that time,
5642 // it is not reasonable to do arithmetic with the addresses of oops (we don't
5643 // have access to the addresses!). This does not seem to currently happen,
5644 // but this assertion here is to help prevent its occurrence.
5645 tty->print_cr("Found oop constant with non-zero offset");
5646 ShouldNotReachHere();
5647 }
5648
5649 return (intptr_t)metadata()->constant_encoding();
5650 }
5651
5652 //------------------------------cast_to_ptr_type-------------------------------
5653 const TypeMetadataPtr* TypeMetadataPtr::cast_to_ptr_type(PTR ptr) const {
5654 if( ptr == _ptr ) return this;
5655 return make(ptr, metadata(), _offset);
5656 }
5657
5658 //------------------------------meet-------------------------------------------
5659 // Compute the MEET of two types. It returns a new Type object.
5660 const Type *TypeMetadataPtr::xmeet( const Type *t ) const {
5661 // Perform a fast test for common case; meeting the same types together.
5662 if( this == t ) return this; // Meeting same type-rep?
5663
5664 // Current "this->_base" is OopPtr
5665 switch (t->base()) { // switch on original type
5666
5667 case Int: // Mixing ints & oops happens when javac
5668 case Long: // reuses local variables
5669 case HalfFloatTop:
5670 case HalfFloatCon:
5671 case HalfFloatBot:
5672 case FloatTop:
5673 case FloatCon:
5674 case FloatBot:
5675 case DoubleTop:
5676 case DoubleCon:
5677 case DoubleBot:
5678 case NarrowOop:
5679 case NarrowKlass:
5680 case Bottom: // Ye Olde Default
5681 return Type::BOTTOM;
5682 case Top:
5683 return this;
5684
5685 default: // All else is a mistake
5686 typerr(t);
5687
5688 case AnyPtr: {
5689 // Found an AnyPtr type vs self-OopPtr type
5690 const TypePtr *tp = t->is_ptr();
5691 int offset = meet_offset(tp->offset());
5692 PTR ptr = meet_ptr(tp->ptr());
5693 switch (tp->ptr()) {
5694 case Null:
5695 if (ptr == Null) return TypePtr::make(AnyPtr, ptr, offset, tp->speculative(), tp->inline_depth());
5696 // else fall through:
5697 case TopPTR:
5698 case AnyNull: {
5699 return make(ptr, _metadata, offset);
5700 }
5701 case BotPTR:
5702 case NotNull:
5703 return TypePtr::make(AnyPtr, ptr, offset, tp->speculative(), tp->inline_depth());
5704 default: typerr(t);
5705 }
5706 }
5707
5708 case RawPtr:
5709 case KlassPtr:
5710 case InstKlassPtr:
5711 case AryKlassPtr:
5712 case OopPtr:
5713 case InstPtr:
5714 case AryPtr:
5715 return TypePtr::BOTTOM; // Oop meet raw is not well defined
5716
5717 case MetadataPtr: {
5718 const TypeMetadataPtr *tp = t->is_metadataptr();
5719 int offset = meet_offset(tp->offset());
5720 PTR tptr = tp->ptr();
5721 PTR ptr = meet_ptr(tptr);
5722 ciMetadata* md = (tptr == TopPTR) ? metadata() : tp->metadata();
5723 if (tptr == TopPTR || _ptr == TopPTR ||
5724 metadata()->equals(tp->metadata())) {
5725 return make(ptr, md, offset);
5726 }
5727 // metadata is different
5728 if( ptr == Constant ) { // Cannot be equal constants, so...
5729 if( tptr == Constant && _ptr != Constant) return t;
5730 if( _ptr == Constant && tptr != Constant) return this;
5731 ptr = NotNull; // Fall down in lattice
5732 }
5733 return make(ptr, nullptr, offset);
5734 break;
5735 }
5736 } // End of switch
5737 return this; // Return the double constant
5738 }
5739
5740
5741 //------------------------------xdual------------------------------------------
5742 // Dual of a pure metadata pointer.
5743 const Type *TypeMetadataPtr::xdual() const {
5744 return new TypeMetadataPtr(dual_ptr(), metadata(), dual_offset());
5745 }
5746
5747 //------------------------------dump2------------------------------------------
5748 #ifndef PRODUCT
5749 void TypeMetadataPtr::dump2( Dict &d, uint depth, outputStream *st ) const {
5750 st->print("metadataptr:%s", ptr_msg[_ptr]);
5751 if( metadata() ) st->print(INTPTR_FORMAT, p2i(metadata()));
5752 switch( _offset ) {
5753 case OffsetTop: st->print("+top"); break;
5754 case OffsetBot: st->print("+any"); break;
5755 case 0: break;
5756 default: st->print("+%d",_offset); break;
5757 }
5758 }
5759 #endif
5760
5761
5762 //=============================================================================
5763 // Convenience common pre-built type.
5764 const TypeMetadataPtr *TypeMetadataPtr::BOTTOM;
5765
5766 TypeMetadataPtr::TypeMetadataPtr(PTR ptr, ciMetadata* metadata, int offset):
5767 TypePtr(MetadataPtr, ptr, offset), _metadata(metadata) {
5768 }
5769
5770 const TypeMetadataPtr* TypeMetadataPtr::make(ciMethod* m) {
5771 return make(Constant, m, 0);
5772 }
5773 const TypeMetadataPtr* TypeMetadataPtr::make(ciMethodData* m) {
5774 return make(Constant, m, 0);
5775 }
5776
5777 //------------------------------make-------------------------------------------
5778 // Create a meta data constant
5779 const TypeMetadataPtr *TypeMetadataPtr::make(PTR ptr, ciMetadata* m, int offset) {
5780 assert(m == nullptr || !m->is_klass(), "wrong type");
5781 return (TypeMetadataPtr*)(new TypeMetadataPtr(ptr, m, offset))->hashcons();
5782 }
5783
5784
5785 const TypeKlassPtr* TypeAryPtr::as_klass_type(bool try_for_exact) const {
5786 const Type* elem = _ary->_elem;
5787 bool xk = klass_is_exact();
5788 if (elem->make_oopptr() != nullptr) {
5789 elem = elem->make_oopptr()->as_klass_type(try_for_exact);
5790 if (elem->is_klassptr()->klass_is_exact()) {
5791 xk = true;
5792 }
5793 }
5794 return TypeAryKlassPtr::make(xk ? TypePtr::Constant : TypePtr::NotNull, elem, klass(), 0);
5795 }
5796
5797 const TypeKlassPtr* TypeKlassPtr::make(ciKlass *klass, InterfaceHandling interface_handling) {
5798 if (klass->is_instance_klass()) {
5799 return TypeInstKlassPtr::make(klass, interface_handling);
5800 }
5801 return TypeAryKlassPtr::make(klass, interface_handling);
5802 }
5803
5804 const TypeKlassPtr* TypeKlassPtr::make(PTR ptr, ciKlass* klass, int offset, InterfaceHandling interface_handling) {
5805 if (klass->is_instance_klass()) {
5806 const TypeInterfaces* interfaces = TypePtr::interfaces(klass, true, true, false, interface_handling);
5807 return TypeInstKlassPtr::make(ptr, klass, interfaces, offset);
5808 }
5809 return TypeAryKlassPtr::make(ptr, klass, offset, interface_handling);
5810 }
5811
5812
5813 //------------------------------TypeKlassPtr-----------------------------------
5814 TypeKlassPtr::TypeKlassPtr(TYPES t, PTR ptr, ciKlass* klass, const TypeInterfaces* interfaces, int offset)
5815 : TypePtr(t, ptr, offset), _klass(klass), _interfaces(interfaces) {
5816 assert(klass == nullptr || !klass->is_loaded() || (klass->is_instance_klass() && !klass->is_interface()) ||
5817 klass->is_type_array_klass() || !klass->as_obj_array_klass()->base_element_klass()->is_interface(), "no interface here");
5818 }
5819
5820 // Is there a single ciKlass* that can represent that type?
5821 ciKlass* TypeKlassPtr::exact_klass_helper() const {
5822 assert(_klass->is_instance_klass() && !_klass->is_interface(), "No interface");
5823 if (_interfaces->empty()) {
5824 return _klass;
5825 }
5826 if (_klass != ciEnv::current()->Object_klass()) {
5827 if (_interfaces->eq(_klass->as_instance_klass())) {
5828 return _klass;
5829 }
5830 return nullptr;
5831 }
5832 return _interfaces->exact_klass();
5833 }
5834
5835 //------------------------------eq---------------------------------------------
5836 // Structural equality check for Type representations
5837 bool TypeKlassPtr::eq(const Type *t) const {
5838 const TypeKlassPtr *p = t->is_klassptr();
5839 return
5840 _interfaces->eq(p->_interfaces) &&
5841 TypePtr::eq(p);
5842 }
5843
5844 //------------------------------hash-------------------------------------------
5845 // Type-specific hashing function.
5846 uint TypeKlassPtr::hash(void) const {
5847 return TypePtr::hash() + _interfaces->hash();
5848 }
5849
5850 //------------------------------singleton--------------------------------------
5851 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
5852 // constants
5853 bool TypeKlassPtr::singleton(void) const {
5854 // detune optimizer to not generate constant klass + constant offset as a constant!
5855 // TopPTR, Null, AnyNull, Constant are all singletons
5856 return (_offset == 0) && !below_centerline(_ptr);
5857 }
5858
5859 // Do not allow interface-vs.-noninterface joins to collapse to top.
5860 const Type *TypeKlassPtr::filter_helper(const Type *kills, bool include_speculative) const {
5861 // logic here mirrors the one from TypeOopPtr::filter. See comments
5862 // there.
5863 const Type* ft = join_helper(kills, include_speculative);
5864
5865 if (ft->empty()) {
5866 return Type::TOP; // Canonical empty value
5867 }
5868
5869 return ft;
5870 }
5871
5872 const TypeInterfaces* TypeKlassPtr::meet_interfaces(const TypeKlassPtr* other) const {
5873 if (above_centerline(_ptr) && above_centerline(other->_ptr)) {
5874 return _interfaces->union_with(other->_interfaces);
5875 } else if (above_centerline(_ptr) && !above_centerline(other->_ptr)) {
5876 return other->_interfaces;
5877 } else if (above_centerline(other->_ptr) && !above_centerline(_ptr)) {
5878 return _interfaces;
5879 }
5880 return _interfaces->intersection_with(other->_interfaces);
5881 }
5882
5883 //------------------------------get_con----------------------------------------
5884 intptr_t TypeKlassPtr::get_con() const {
5885 assert( _ptr == Null || _ptr == Constant, "" );
5886 assert( _offset >= 0, "" );
5887
5888 if (_offset != 0) {
5889 // After being ported to the compiler interface, the compiler no longer
5890 // directly manipulates the addresses of oops. Rather, it only has a pointer
5891 // to a handle at compile time. This handle is embedded in the generated
5892 // code and dereferenced at the time the nmethod is made. Until that time,
5893 // it is not reasonable to do arithmetic with the addresses of oops (we don't
5894 // have access to the addresses!). This does not seem to currently happen,
5895 // but this assertion here is to help prevent its occurrence.
5896 tty->print_cr("Found oop constant with non-zero offset");
5897 ShouldNotReachHere();
5898 }
5899
5900 ciKlass* k = exact_klass();
5901
5902 return (intptr_t)k->constant_encoding();
5903 }
5904
5905 //------------------------------dump2------------------------------------------
5906 // Dump Klass Type
5907 #ifndef PRODUCT
5908 void TypeKlassPtr::dump2(Dict & d, uint depth, outputStream *st) const {
5909 switch(_ptr) {
5910 case Constant:
5911 st->print("precise ");
5912 case NotNull:
5913 {
5914 const char *name = klass()->name()->as_utf8();
5915 if (name) {
5916 st->print("%s: " INTPTR_FORMAT, name, p2i(klass()));
5917 } else {
5918 ShouldNotReachHere();
5919 }
5920 _interfaces->dump(st);
5921 }
5922 case BotPTR:
5923 if (!WizardMode && !Verbose && _ptr != Constant) break;
5924 case TopPTR:
5925 case AnyNull:
5926 st->print(":%s", ptr_msg[_ptr]);
5927 if (_ptr == Constant) st->print(":exact");
5928 break;
5929 default:
5930 break;
5931 }
5932
5933 if (_offset) { // Dump offset, if any
5934 if (_offset == OffsetBot) { st->print("+any"); }
5935 else if (_offset == OffsetTop) { st->print("+unknown"); }
5936 else { st->print("+%d", _offset); }
5937 }
5938
5939 st->print(" *");
5940 }
5941 #endif
5942
5943 //=============================================================================
5944 // Convenience common pre-built types.
5945
5946 // Not-null object klass or below
5947 const TypeInstKlassPtr *TypeInstKlassPtr::OBJECT;
5948 const TypeInstKlassPtr *TypeInstKlassPtr::OBJECT_OR_NULL;
5949
5950 bool TypeInstKlassPtr::eq(const Type *t) const {
5951 const TypeKlassPtr *p = t->is_klassptr();
5952 return
5953 klass()->equals(p->klass()) &&
5954 TypeKlassPtr::eq(p);
5955 }
5956
5957 uint TypeInstKlassPtr::hash(void) const {
5958 return klass()->hash() + TypeKlassPtr::hash();
5959 }
5960
5961 const TypeInstKlassPtr *TypeInstKlassPtr::make(PTR ptr, ciKlass* k, const TypeInterfaces* interfaces, int offset) {
5962 TypeInstKlassPtr *r =
5963 (TypeInstKlassPtr*)(new TypeInstKlassPtr(ptr, k, interfaces, offset))->hashcons();
5964
5965 return r;
5966 }
5967
5968 //------------------------------add_offset-------------------------------------
5969 // Access internals of klass object
5970 const TypePtr* TypeInstKlassPtr::add_offset( intptr_t offset ) const {
5971 return make( _ptr, klass(), _interfaces, xadd_offset(offset) );
5972 }
5973
5974 const TypeInstKlassPtr* TypeInstKlassPtr::with_offset(intptr_t offset) const {
5975 return make(_ptr, klass(), _interfaces, offset);
5976 }
5977
5978 //------------------------------cast_to_ptr_type-------------------------------
5979 const TypeInstKlassPtr* TypeInstKlassPtr::cast_to_ptr_type(PTR ptr) const {
5980 assert(_base == InstKlassPtr, "subclass must override cast_to_ptr_type");
5981 if( ptr == _ptr ) return this;
5982 return make(ptr, _klass, _interfaces, _offset);
5983 }
5984
5985
5986 bool TypeInstKlassPtr::must_be_exact() const {
5987 if (!_klass->is_loaded()) return false;
5988 ciInstanceKlass* ik = _klass->as_instance_klass();
5989 if (ik->is_final()) return true; // cannot clear xk
5990 return false;
5991 }
5992
5993 //-----------------------------cast_to_exactness-------------------------------
5994 const TypeKlassPtr* TypeInstKlassPtr::cast_to_exactness(bool klass_is_exact) const {
5995 if (klass_is_exact == (_ptr == Constant)) return this;
5996 if (must_be_exact()) return this;
5997 ciKlass* k = klass();
5998 return make(klass_is_exact ? Constant : NotNull, k, _interfaces, _offset);
5999 }
6000
6001
6002 //-----------------------------as_instance_type--------------------------------
6003 // Corresponding type for an instance of the given class.
6004 // It will be NotNull, and exact if and only if the klass type is exact.
6005 const TypeOopPtr* TypeInstKlassPtr::as_instance_type(bool klass_change) const {
6006 ciKlass* k = klass();
6007 bool xk = klass_is_exact();
6008 Compile* C = Compile::current();
6009 Dependencies* deps = C->dependencies();
6010 assert((deps != nullptr) == (C->method() != nullptr && C->method()->code_size() > 0), "sanity");
6011 // Element is an instance
6012 bool klass_is_exact = false;
6013 const TypeInterfaces* interfaces = _interfaces;
6014 if (k->is_loaded()) {
6015 // Try to set klass_is_exact.
6016 ciInstanceKlass* ik = k->as_instance_klass();
6017 klass_is_exact = ik->is_final();
6018 if (!klass_is_exact && klass_change
6019 && deps != nullptr && UseUniqueSubclasses) {
6020 ciInstanceKlass* sub = ik->unique_concrete_subklass();
6021 if (sub != nullptr) {
6022 if (_interfaces->eq(sub)) {
6023 deps->assert_abstract_with_unique_concrete_subtype(ik, sub);
6024 k = ik = sub;
6025 xk = sub->is_final();
6026 }
6027 }
6028 }
6029 }
6030 return TypeInstPtr::make(TypePtr::BotPTR, k, interfaces, xk, nullptr, 0);
6031 }
6032
6033 //------------------------------xmeet------------------------------------------
6034 // Compute the MEET of two types, return a new Type object.
6035 const Type *TypeInstKlassPtr::xmeet( const Type *t ) const {
6036 // Perform a fast test for common case; meeting the same types together.
6037 if( this == t ) return this; // Meeting same type-rep?
6038
6039 // Current "this->_base" is Pointer
6040 switch (t->base()) { // switch on original type
6041
6042 case Int: // Mixing ints & oops happens when javac
6043 case Long: // reuses local variables
6044 case HalfFloatTop:
6045 case HalfFloatCon:
6046 case HalfFloatBot:
6047 case FloatTop:
6048 case FloatCon:
6049 case FloatBot:
6050 case DoubleTop:
6051 case DoubleCon:
6052 case DoubleBot:
6053 case NarrowOop:
6054 case NarrowKlass:
6055 case Bottom: // Ye Olde Default
6056 return Type::BOTTOM;
6057 case Top:
6058 return this;
6059
6060 default: // All else is a mistake
6061 typerr(t);
6062
6063 case AnyPtr: { // Meeting to AnyPtrs
6064 // Found an AnyPtr type vs self-KlassPtr type
6065 const TypePtr *tp = t->is_ptr();
6066 int offset = meet_offset(tp->offset());
6067 PTR ptr = meet_ptr(tp->ptr());
6068 switch (tp->ptr()) {
6069 case TopPTR:
6070 return this;
6071 case Null:
6072 if( ptr == Null ) return TypePtr::make(AnyPtr, ptr, offset, tp->speculative(), tp->inline_depth());
6073 case AnyNull:
6074 return make( ptr, klass(), _interfaces, offset );
6075 case BotPTR:
6076 case NotNull:
6077 return TypePtr::make(AnyPtr, ptr, offset, tp->speculative(), tp->inline_depth());
6078 default: typerr(t);
6079 }
6080 }
6081
6082 case RawPtr:
6083 case MetadataPtr:
6084 case OopPtr:
6085 case AryPtr: // Meet with AryPtr
6086 case InstPtr: // Meet with InstPtr
6087 return TypePtr::BOTTOM;
6088
6089 //
6090 // A-top }
6091 // / | \ } Tops
6092 // B-top A-any C-top }
6093 // | / | \ | } Any-nulls
6094 // B-any | C-any }
6095 // | | |
6096 // B-con A-con C-con } constants; not comparable across classes
6097 // | | |
6098 // B-not | C-not }
6099 // | \ | / | } not-nulls
6100 // B-bot A-not C-bot }
6101 // \ | / } Bottoms
6102 // A-bot }
6103 //
6104
6105 case InstKlassPtr: { // Meet two KlassPtr types
6106 const TypeInstKlassPtr *tkls = t->is_instklassptr();
6107 int off = meet_offset(tkls->offset());
6108 PTR ptr = meet_ptr(tkls->ptr());
6109 const TypeInterfaces* interfaces = meet_interfaces(tkls);
6110
6111 ciKlass* res_klass = nullptr;
6112 bool res_xk = false;
6113 switch(meet_instptr(ptr, interfaces, this, tkls, res_klass, res_xk)) {
6114 case UNLOADED:
6115 ShouldNotReachHere();
6116 case SUBTYPE:
6117 case NOT_SUBTYPE:
6118 case LCA:
6119 case QUICK: {
6120 assert(res_xk == (ptr == Constant), "");
6121 const Type* res = make(ptr, res_klass, interfaces, off);
6122 return res;
6123 }
6124 default:
6125 ShouldNotReachHere();
6126 }
6127 } // End of case KlassPtr
6128 case AryKlassPtr: { // All arrays inherit from Object class
6129 const TypeAryKlassPtr *tp = t->is_aryklassptr();
6130 int offset = meet_offset(tp->offset());
6131 PTR ptr = meet_ptr(tp->ptr());
6132 const TypeInterfaces* interfaces = meet_interfaces(tp);
6133 const TypeInterfaces* tp_interfaces = tp->_interfaces;
6134 const TypeInterfaces* this_interfaces = _interfaces;
6135
6136 switch (ptr) {
6137 case TopPTR:
6138 case AnyNull: // Fall 'down' to dual of object klass
6139 // For instances when a subclass meets a superclass we fall
6140 // below the centerline when the superclass is exact. We need to
6141 // do the same here.
6142 if (klass()->equals(ciEnv::current()->Object_klass()) && tp_interfaces->contains(this_interfaces) && !klass_is_exact()) {
6143 return TypeAryKlassPtr::make(ptr, tp->elem(), tp->klass(), offset);
6144 } else {
6145 // cannot subclass, so the meet has to fall badly below the centerline
6146 ptr = NotNull;
6147 interfaces = _interfaces->intersection_with(tp->_interfaces);
6148 return make(ptr, ciEnv::current()->Object_klass(), interfaces, offset);
6149 }
6150 case Constant:
6151 case NotNull:
6152 case BotPTR: // Fall down to object klass
6153 // LCA is object_klass, but if we subclass from the top we can do better
6154 if( above_centerline(_ptr) ) { // if( _ptr == TopPTR || _ptr == AnyNull )
6155 // If 'this' (InstPtr) is above the centerline and it is Object class
6156 // then we can subclass in the Java class hierarchy.
6157 // For instances when a subclass meets a superclass we fall
6158 // below the centerline when the superclass is exact. We need
6159 // to do the same here.
6160 if (klass()->equals(ciEnv::current()->Object_klass()) && tp_interfaces->contains(this_interfaces) && !klass_is_exact()) {
6161 // that is, tp's array type is a subtype of my klass
6162 return TypeAryKlassPtr::make(ptr,
6163 tp->elem(), tp->klass(), offset);
6164 }
6165 }
6166 // The other case cannot happen, since I cannot be a subtype of an array.
6167 // The meet falls down to Object class below centerline.
6168 if( ptr == Constant )
6169 ptr = NotNull;
6170 interfaces = this_interfaces->intersection_with(tp_interfaces);
6171 return make(ptr, ciEnv::current()->Object_klass(), interfaces, offset);
6172 default: typerr(t);
6173 }
6174 }
6175
6176 } // End of switch
6177 return this; // Return the double constant
6178 }
6179
6180 //------------------------------xdual------------------------------------------
6181 // Dual: compute field-by-field dual
6182 const Type *TypeInstKlassPtr::xdual() const {
6183 return new TypeInstKlassPtr(dual_ptr(), klass(), _interfaces, dual_offset());
6184 }
6185
6186 template <class T1, class T2> bool TypePtr::is_java_subtype_of_helper_for_instance(const T1* this_one, const T2* other, bool this_exact, bool other_exact) {
6187 static_assert(std::is_base_of<T2, T1>::value, "");
6188 if (!this_one->is_loaded() || !other->is_loaded()) {
6189 return false;
6190 }
6191 if (!this_one->is_instance_type(other)) {
6192 return false;
6193 }
6194
6195 if (!other_exact) {
6196 return false;
6197 }
6198
6199 if (other->klass()->equals(ciEnv::current()->Object_klass()) && other->_interfaces->empty()) {
6200 return true;
6201 }
6202
6203 return this_one->klass()->is_subtype_of(other->klass()) && this_one->_interfaces->contains(other->_interfaces);
6204 }
6205
6206 bool TypeInstKlassPtr::might_be_an_array() const {
6207 if (!instance_klass()->is_java_lang_Object()) {
6208 // TypeInstKlassPtr can be an array only if it is java.lang.Object: the only supertype of array types.
6209 return false;
6210 }
6211 if (interfaces()->has_non_array_interface()) {
6212 // Arrays only implement Cloneable and Serializable. If we see any other interface, [this] cannot be an array.
6213 return false;
6214 }
6215 // Cannot prove it's not an array.
6216 return true;
6217 }
6218
6219 bool TypeInstKlassPtr::is_java_subtype_of_helper(const TypeKlassPtr* other, bool this_exact, bool other_exact) const {
6220 return TypePtr::is_java_subtype_of_helper_for_instance(this, other, this_exact, other_exact);
6221 }
6222
6223 template <class T1, class T2> bool TypePtr::is_same_java_type_as_helper_for_instance(const T1* this_one, const T2* other) {
6224 static_assert(std::is_base_of<T2, T1>::value, "");
6225 if (!this_one->is_loaded() || !other->is_loaded()) {
6226 return false;
6227 }
6228 if (!this_one->is_instance_type(other)) {
6229 return false;
6230 }
6231 return this_one->klass()->equals(other->klass()) && this_one->_interfaces->eq(other->_interfaces);
6232 }
6233
6234 bool TypeInstKlassPtr::is_same_java_type_as_helper(const TypeKlassPtr* other) const {
6235 return TypePtr::is_same_java_type_as_helper_for_instance(this, other);
6236 }
6237
6238 template <class T1, class T2> bool TypePtr::maybe_java_subtype_of_helper_for_instance(const T1* this_one, const T2* other, bool this_exact, bool other_exact) {
6239 static_assert(std::is_base_of<T2, T1>::value, "");
6240 if (!this_one->is_loaded() || !other->is_loaded()) {
6241 return true;
6242 }
6243
6244 if (this_one->is_array_type(other)) {
6245 return !this_exact && this_one->klass()->equals(ciEnv::current()->Object_klass()) && other->_interfaces->contains(this_one->_interfaces);
6246 }
6247
6248 assert(this_one->is_instance_type(other), "unsupported");
6249
6250 if (this_exact && other_exact) {
6251 return this_one->is_java_subtype_of(other);
6252 }
6253
6254 if (!this_one->klass()->is_subtype_of(other->klass()) && !other->klass()->is_subtype_of(this_one->klass())) {
6255 return false;
6256 }
6257
6258 if (this_exact) {
6259 return this_one->klass()->is_subtype_of(other->klass()) && this_one->_interfaces->contains(other->_interfaces);
6260 }
6261
6262 return true;
6263 }
6264
6265 bool TypeInstKlassPtr::maybe_java_subtype_of_helper(const TypeKlassPtr* other, bool this_exact, bool other_exact) const {
6266 return TypePtr::maybe_java_subtype_of_helper_for_instance(this, other, this_exact, other_exact);
6267 }
6268
6269 const TypeKlassPtr* TypeInstKlassPtr::try_improve() const {
6270 if (!UseUniqueSubclasses) {
6271 return this;
6272 }
6273 ciKlass* k = klass();
6274 Compile* C = Compile::current();
6275 Dependencies* deps = C->dependencies();
6276 assert((deps != nullptr) == (C->method() != nullptr && C->method()->code_size() > 0), "sanity");
6277 const TypeInterfaces* interfaces = _interfaces;
6278 if (k->is_loaded()) {
6279 ciInstanceKlass* ik = k->as_instance_klass();
6280 bool klass_is_exact = ik->is_final();
6281 if (!klass_is_exact &&
6282 deps != nullptr) {
6283 ciInstanceKlass* sub = ik->unique_concrete_subklass();
6284 if (sub != nullptr) {
6285 if (_interfaces->eq(sub)) {
6286 deps->assert_abstract_with_unique_concrete_subtype(ik, sub);
6287 k = ik = sub;
6288 klass_is_exact = sub->is_final();
6289 return TypeKlassPtr::make(klass_is_exact ? Constant : _ptr, k, _offset);
6290 }
6291 }
6292 }
6293 }
6294 return this;
6295 }
6296
6297
6298 const TypeAryKlassPtr *TypeAryKlassPtr::make(PTR ptr, const Type* elem, ciKlass* k, int offset) {
6299 return (TypeAryKlassPtr*)(new TypeAryKlassPtr(ptr, elem, k, offset))->hashcons();
6300 }
6301
6302 const TypeAryKlassPtr *TypeAryKlassPtr::make(PTR ptr, ciKlass* k, int offset, InterfaceHandling interface_handling) {
6303 if (k->is_obj_array_klass()) {
6304 // Element is an object array. Recursively call ourself.
6305 ciKlass* eklass = k->as_obj_array_klass()->element_klass();
6306 const TypeKlassPtr *etype = TypeKlassPtr::make(eklass, interface_handling)->cast_to_exactness(false);
6307 return TypeAryKlassPtr::make(ptr, etype, nullptr, offset);
6308 } else if (k->is_type_array_klass()) {
6309 // Element is an typeArray
6310 const Type* etype = get_const_basic_type(k->as_type_array_klass()->element_type());
6311 return TypeAryKlassPtr::make(ptr, etype, k, offset);
6312 } else {
6313 ShouldNotReachHere();
6314 return nullptr;
6315 }
6316 }
6317
6318 const TypeAryKlassPtr* TypeAryKlassPtr::make(ciKlass* klass, InterfaceHandling interface_handling) {
6319 return TypeAryKlassPtr::make(Constant, klass, 0, interface_handling);
6320 }
6321
6322 //------------------------------eq---------------------------------------------
6323 // Structural equality check for Type representations
6324 bool TypeAryKlassPtr::eq(const Type *t) const {
6325 const TypeAryKlassPtr *p = t->is_aryklassptr();
6326 return
6327 _elem == p->_elem && // Check array
6328 TypeKlassPtr::eq(p); // Check sub-parts
6329 }
6330
6331 //------------------------------hash-------------------------------------------
6332 // Type-specific hashing function.
6333 uint TypeAryKlassPtr::hash(void) const {
6334 return (uint)(uintptr_t)_elem + TypeKlassPtr::hash();
6335 }
6336
6337 //----------------------compute_klass------------------------------------------
6338 // Compute the defining klass for this class
6339 ciKlass* TypeAryPtr::compute_klass() const {
6340 // Compute _klass based on element type.
6341 ciKlass* k_ary = nullptr;
6342 const TypeInstPtr *tinst;
6343 const TypeAryPtr *tary;
6344 const Type* el = elem();
6345 if (el->isa_narrowoop()) {
6346 el = el->make_ptr();
6347 }
6348
6349 // Get element klass
6350 if ((tinst = el->isa_instptr()) != nullptr) {
6351 // Leave k_ary at null.
6352 } else if ((tary = el->isa_aryptr()) != nullptr) {
6353 // Leave k_ary at null.
6354 } else if ((el->base() == Type::Top) ||
6355 (el->base() == Type::Bottom)) {
6356 // element type of Bottom occurs from meet of basic type
6357 // and object; Top occurs when doing join on Bottom.
6358 // Leave k_ary at null.
6359 } else {
6360 assert(!el->isa_int(), "integral arrays must be pre-equipped with a class");
6361 // Compute array klass directly from basic type
6362 k_ary = ciTypeArrayKlass::make(el->basic_type());
6363 }
6364 return k_ary;
6365 }
6366
6367 //------------------------------klass------------------------------------------
6368 // Return the defining klass for this class
6369 ciKlass* TypeAryPtr::klass() const {
6370 if( _klass ) return _klass; // Return cached value, if possible
6371
6372 // Oops, need to compute _klass and cache it
6373 ciKlass* k_ary = compute_klass();
6374
6375 if( this != TypeAryPtr::OOPS && this->dual() != TypeAryPtr::OOPS ) {
6376 // The _klass field acts as a cache of the underlying
6377 // ciKlass for this array type. In order to set the field,
6378 // we need to cast away const-ness.
6379 //
6380 // IMPORTANT NOTE: we *never* set the _klass field for the
6381 // type TypeAryPtr::OOPS. This Type is shared between all
6382 // active compilations. However, the ciKlass which represents
6383 // this Type is *not* shared between compilations, so caching
6384 // this value would result in fetching a dangling pointer.
6385 //
6386 // Recomputing the underlying ciKlass for each request is
6387 // a bit less efficient than caching, but calls to
6388 // TypeAryPtr::OOPS->klass() are not common enough to matter.
6389 ((TypeAryPtr*)this)->_klass = k_ary;
6390 }
6391 return k_ary;
6392 }
6393
6394 // Is there a single ciKlass* that can represent that type?
6395 ciKlass* TypeAryPtr::exact_klass_helper() const {
6396 if (_ary->_elem->make_ptr() && _ary->_elem->make_ptr()->isa_oopptr()) {
6397 ciKlass* k = _ary->_elem->make_ptr()->is_oopptr()->exact_klass_helper();
6398 if (k == nullptr) {
6399 return nullptr;
6400 }
6401 k = ciObjArrayKlass::make(k);
6402 return k;
6403 }
6404
6405 return klass();
6406 }
6407
6408 const Type* TypeAryPtr::base_element_type(int& dims) const {
6409 const Type* elem = this->elem();
6410 dims = 1;
6411 while (elem->make_ptr() && elem->make_ptr()->isa_aryptr()) {
6412 elem = elem->make_ptr()->is_aryptr()->elem();
6413 dims++;
6414 }
6415 return elem;
6416 }
6417
6418 //------------------------------add_offset-------------------------------------
6419 // Access internals of klass object
6420 const TypePtr* TypeAryKlassPtr::add_offset(intptr_t offset) const {
6421 return make(_ptr, elem(), klass(), xadd_offset(offset));
6422 }
6423
6424 const TypeAryKlassPtr* TypeAryKlassPtr::with_offset(intptr_t offset) const {
6425 return make(_ptr, elem(), klass(), offset);
6426 }
6427
6428 //------------------------------cast_to_ptr_type-------------------------------
6429 const TypeAryKlassPtr* TypeAryKlassPtr::cast_to_ptr_type(PTR ptr) const {
6430 assert(_base == AryKlassPtr, "subclass must override cast_to_ptr_type");
6431 if (ptr == _ptr) return this;
6432 return make(ptr, elem(), _klass, _offset);
6433 }
6434
6435 bool TypeAryKlassPtr::must_be_exact() const {
6436 if (_elem == Type::BOTTOM) return false;
6437 if (_elem == Type::TOP ) return false;
6438 const TypeKlassPtr* tk = _elem->isa_klassptr();
6439 if (!tk) return true; // a primitive type, like int
6440 return tk->must_be_exact();
6441 }
6442
6443
6444 //-----------------------------cast_to_exactness-------------------------------
6445 const TypeKlassPtr *TypeAryKlassPtr::cast_to_exactness(bool klass_is_exact) const {
6446 if (must_be_exact()) return this; // cannot clear xk
6447 ciKlass* k = _klass;
6448 const Type* elem = this->elem();
6449 if (elem->isa_klassptr() && !klass_is_exact) {
6450 elem = elem->is_klassptr()->cast_to_exactness(klass_is_exact);
6451 }
6452 return make(klass_is_exact ? Constant : NotNull, elem, k, _offset);
6453 }
6454
6455
6456 //-----------------------------as_instance_type--------------------------------
6457 // Corresponding type for an instance of the given class.
6458 // It will be NotNull, and exact if and only if the klass type is exact.
6459 const TypeOopPtr* TypeAryKlassPtr::as_instance_type(bool klass_change) const {
6460 ciKlass* k = klass();
6461 bool xk = klass_is_exact();
6462 const Type* el = nullptr;
6463 if (elem()->isa_klassptr()) {
6464 el = elem()->is_klassptr()->as_instance_type(false)->cast_to_exactness(false);
6465 k = nullptr;
6466 } else {
6467 el = elem();
6468 }
6469 return TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(el, TypeInt::POS), k, xk, 0);
6470 }
6471
6472
6473 //------------------------------xmeet------------------------------------------
6474 // Compute the MEET of two types, return a new Type object.
6475 const Type *TypeAryKlassPtr::xmeet( const Type *t ) const {
6476 // Perform a fast test for common case; meeting the same types together.
6477 if( this == t ) return this; // Meeting same type-rep?
6478
6479 // Current "this->_base" is Pointer
6480 switch (t->base()) { // switch on original type
6481
6482 case Int: // Mixing ints & oops happens when javac
6483 case Long: // reuses local variables
6484 case HalfFloatTop:
6485 case HalfFloatCon:
6486 case HalfFloatBot:
6487 case FloatTop:
6488 case FloatCon:
6489 case FloatBot:
6490 case DoubleTop:
6491 case DoubleCon:
6492 case DoubleBot:
6493 case NarrowOop:
6494 case NarrowKlass:
6495 case Bottom: // Ye Olde Default
6496 return Type::BOTTOM;
6497 case Top:
6498 return this;
6499
6500 default: // All else is a mistake
6501 typerr(t);
6502
6503 case AnyPtr: { // Meeting to AnyPtrs
6504 // Found an AnyPtr type vs self-KlassPtr type
6505 const TypePtr *tp = t->is_ptr();
6506 int offset = meet_offset(tp->offset());
6507 PTR ptr = meet_ptr(tp->ptr());
6508 switch (tp->ptr()) {
6509 case TopPTR:
6510 return this;
6511 case Null:
6512 if( ptr == Null ) return TypePtr::make(AnyPtr, ptr, offset, tp->speculative(), tp->inline_depth());
6513 case AnyNull:
6514 return make( ptr, _elem, klass(), offset );
6515 case BotPTR:
6516 case NotNull:
6517 return TypePtr::make(AnyPtr, ptr, offset, tp->speculative(), tp->inline_depth());
6518 default: typerr(t);
6519 }
6520 }
6521
6522 case RawPtr:
6523 case MetadataPtr:
6524 case OopPtr:
6525 case AryPtr: // Meet with AryPtr
6526 case InstPtr: // Meet with InstPtr
6527 return TypePtr::BOTTOM;
6528
6529 //
6530 // A-top }
6531 // / | \ } Tops
6532 // B-top A-any C-top }
6533 // | / | \ | } Any-nulls
6534 // B-any | C-any }
6535 // | | |
6536 // B-con A-con C-con } constants; not comparable across classes
6537 // | | |
6538 // B-not | C-not }
6539 // | \ | / | } not-nulls
6540 // B-bot A-not C-bot }
6541 // \ | / } Bottoms
6542 // A-bot }
6543 //
6544
6545 case AryKlassPtr: { // Meet two KlassPtr types
6546 const TypeAryKlassPtr *tap = t->is_aryklassptr();
6547 int off = meet_offset(tap->offset());
6548 const Type* elem = _elem->meet(tap->_elem);
6549
6550 PTR ptr = meet_ptr(tap->ptr());
6551 ciKlass* res_klass = nullptr;
6552 bool res_xk = false;
6553 meet_aryptr(ptr, elem, this, tap, res_klass, res_xk);
6554 assert(res_xk == (ptr == Constant), "");
6555 return make(ptr, elem, res_klass, off);
6556 } // End of case KlassPtr
6557 case InstKlassPtr: {
6558 const TypeInstKlassPtr *tp = t->is_instklassptr();
6559 int offset = meet_offset(tp->offset());
6560 PTR ptr = meet_ptr(tp->ptr());
6561 const TypeInterfaces* interfaces = meet_interfaces(tp);
6562 const TypeInterfaces* tp_interfaces = tp->_interfaces;
6563 const TypeInterfaces* this_interfaces = _interfaces;
6564
6565 switch (ptr) {
6566 case TopPTR:
6567 case AnyNull: // Fall 'down' to dual of object klass
6568 // For instances when a subclass meets a superclass we fall
6569 // below the centerline when the superclass is exact. We need to
6570 // do the same here.
6571 if (tp->klass()->equals(ciEnv::current()->Object_klass()) && this_interfaces->contains(tp_interfaces) &&
6572 !tp->klass_is_exact()) {
6573 return TypeAryKlassPtr::make(ptr, _elem, _klass, offset);
6574 } else {
6575 // cannot subclass, so the meet has to fall badly below the centerline
6576 ptr = NotNull;
6577 interfaces = this_interfaces->intersection_with(tp->_interfaces);
6578 return TypeInstKlassPtr::make(ptr, ciEnv::current()->Object_klass(), interfaces, offset);
6579 }
6580 case Constant:
6581 case NotNull:
6582 case BotPTR: // Fall down to object klass
6583 // LCA is object_klass, but if we subclass from the top we can do better
6584 if (above_centerline(tp->ptr())) {
6585 // If 'tp' is above the centerline and it is Object class
6586 // then we can subclass in the Java class hierarchy.
6587 // For instances when a subclass meets a superclass we fall
6588 // below the centerline when the superclass is exact. We need
6589 // to do the same here.
6590 if (tp->klass()->equals(ciEnv::current()->Object_klass()) && this_interfaces->contains(tp_interfaces) &&
6591 !tp->klass_is_exact()) {
6592 // that is, my array type is a subtype of 'tp' klass
6593 return make(ptr, _elem, _klass, offset);
6594 }
6595 }
6596 // The other case cannot happen, since t cannot be a subtype of an array.
6597 // The meet falls down to Object class below centerline.
6598 if (ptr == Constant)
6599 ptr = NotNull;
6600 interfaces = this_interfaces->intersection_with(tp_interfaces);
6601 return TypeInstKlassPtr::make(ptr, ciEnv::current()->Object_klass(), interfaces, offset);
6602 default: typerr(t);
6603 }
6604 }
6605
6606 } // End of switch
6607 return this; // Return the double constant
6608 }
6609
6610 template <class T1, class T2> bool TypePtr::is_java_subtype_of_helper_for_array(const T1* this_one, const T2* other, bool this_exact, bool other_exact) {
6611 static_assert(std::is_base_of<T2, T1>::value, "");
6612
6613 if (other->klass() == ciEnv::current()->Object_klass() && other->_interfaces->empty() && other_exact) {
6614 return true;
6615 }
6616
6617 int dummy;
6618 bool this_top_or_bottom = (this_one->base_element_type(dummy) == Type::TOP || this_one->base_element_type(dummy) == Type::BOTTOM);
6619
6620 if (!this_one->is_loaded() || !other->is_loaded() || this_top_or_bottom) {
6621 return false;
6622 }
6623
6624 if (this_one->is_instance_type(other)) {
6625 return other->klass() == ciEnv::current()->Object_klass() && this_one->_interfaces->contains(other->_interfaces) &&
6626 other_exact;
6627 }
6628
6629 assert(this_one->is_array_type(other), "");
6630 const T1* other_ary = this_one->is_array_type(other);
6631 bool other_top_or_bottom = (other_ary->base_element_type(dummy) == Type::TOP || other_ary->base_element_type(dummy) == Type::BOTTOM);
6632 if (other_top_or_bottom) {
6633 return false;
6634 }
6635
6636 const TypePtr* other_elem = other_ary->elem()->make_ptr();
6637 const TypePtr* this_elem = this_one->elem()->make_ptr();
6638 if (this_elem != nullptr && other_elem != nullptr) {
6639 return this_one->is_reference_type(this_elem)->is_java_subtype_of_helper(this_one->is_reference_type(other_elem), this_exact, other_exact);
6640 }
6641 if (this_elem == nullptr && other_elem == nullptr) {
6642 return this_one->klass()->is_subtype_of(other->klass());
6643 }
6644 return false;
6645 }
6646
6647 bool TypeAryKlassPtr::is_java_subtype_of_helper(const TypeKlassPtr* other, bool this_exact, bool other_exact) const {
6648 return TypePtr::is_java_subtype_of_helper_for_array(this, other, this_exact, other_exact);
6649 }
6650
6651 template <class T1, class T2> bool TypePtr::is_same_java_type_as_helper_for_array(const T1* this_one, const T2* other) {
6652 static_assert(std::is_base_of<T2, T1>::value, "");
6653
6654 int dummy;
6655 bool this_top_or_bottom = (this_one->base_element_type(dummy) == Type::TOP || this_one->base_element_type(dummy) == Type::BOTTOM);
6656
6657 if (!this_one->is_array_type(other) ||
6658 !this_one->is_loaded() || !other->is_loaded() || this_top_or_bottom) {
6659 return false;
6660 }
6661 const T1* other_ary = this_one->is_array_type(other);
6662 bool other_top_or_bottom = (other_ary->base_element_type(dummy) == Type::TOP || other_ary->base_element_type(dummy) == Type::BOTTOM);
6663
6664 if (other_top_or_bottom) {
6665 return false;
6666 }
6667
6668 const TypePtr* other_elem = other_ary->elem()->make_ptr();
6669 const TypePtr* this_elem = this_one->elem()->make_ptr();
6670 if (other_elem != nullptr && this_elem != nullptr) {
6671 return this_one->is_reference_type(this_elem)->is_same_java_type_as(this_one->is_reference_type(other_elem));
6672 }
6673 if (other_elem == nullptr && this_elem == nullptr) {
6674 return this_one->klass()->equals(other->klass());
6675 }
6676 return false;
6677 }
6678
6679 bool TypeAryKlassPtr::is_same_java_type_as_helper(const TypeKlassPtr* other) const {
6680 return TypePtr::is_same_java_type_as_helper_for_array(this, other);
6681 }
6682
6683 template <class T1, class T2> bool TypePtr::maybe_java_subtype_of_helper_for_array(const T1* this_one, const T2* other, bool this_exact, bool other_exact) {
6684 static_assert(std::is_base_of<T2, T1>::value, "");
6685 if (other->klass() == ciEnv::current()->Object_klass() && other->_interfaces->empty() && other_exact) {
6686 return true;
6687 }
6688 if (!this_one->is_loaded() || !other->is_loaded()) {
6689 return true;
6690 }
6691 if (this_one->is_instance_type(other)) {
6692 return other->klass()->equals(ciEnv::current()->Object_klass()) &&
6693 this_one->_interfaces->contains(other->_interfaces);
6694 }
6695
6696 int dummy;
6697 bool this_top_or_bottom = (this_one->base_element_type(dummy) == Type::TOP || this_one->base_element_type(dummy) == Type::BOTTOM);
6698 if (this_top_or_bottom) {
6699 return true;
6700 }
6701
6702 assert(this_one->is_array_type(other), "");
6703
6704 const T1* other_ary = this_one->is_array_type(other);
6705 bool other_top_or_bottom = (other_ary->base_element_type(dummy) == Type::TOP || other_ary->base_element_type(dummy) == Type::BOTTOM);
6706 if (other_top_or_bottom) {
6707 return true;
6708 }
6709 if (this_exact && other_exact) {
6710 return this_one->is_java_subtype_of(other);
6711 }
6712
6713 const TypePtr* this_elem = this_one->elem()->make_ptr();
6714 const TypePtr* other_elem = other_ary->elem()->make_ptr();
6715 if (other_elem != nullptr && this_elem != nullptr) {
6716 return this_one->is_reference_type(this_elem)->maybe_java_subtype_of_helper(this_one->is_reference_type(other_elem), this_exact, other_exact);
6717 }
6718 if (other_elem == nullptr && this_elem == nullptr) {
6719 return this_one->klass()->is_subtype_of(other->klass());
6720 }
6721 return false;
6722 }
6723
6724 bool TypeAryKlassPtr::maybe_java_subtype_of_helper(const TypeKlassPtr* other, bool this_exact, bool other_exact) const {
6725 return TypePtr::maybe_java_subtype_of_helper_for_array(this, other, this_exact, other_exact);
6726 }
6727
6728 //------------------------------xdual------------------------------------------
6729 // Dual: compute field-by-field dual
6730 const Type *TypeAryKlassPtr::xdual() const {
6731 return new TypeAryKlassPtr(dual_ptr(), elem()->dual(), klass(), dual_offset());
6732 }
6733
6734 // Is there a single ciKlass* that can represent that type?
6735 ciKlass* TypeAryKlassPtr::exact_klass_helper() const {
6736 if (elem()->isa_klassptr()) {
6737 ciKlass* k = elem()->is_klassptr()->exact_klass_helper();
6738 if (k == nullptr) {
6739 return nullptr;
6740 }
6741 k = ciObjArrayKlass::make(k);
6742 return k;
6743 }
6744
6745 return klass();
6746 }
6747
6748 ciKlass* TypeAryKlassPtr::klass() const {
6749 if (_klass != nullptr) {
6750 return _klass;
6751 }
6752 ciKlass* k = nullptr;
6753 if (elem()->isa_klassptr()) {
6754 // leave null
6755 } else if ((elem()->base() == Type::Top) ||
6756 (elem()->base() == Type::Bottom)) {
6757 } else {
6758 k = ciTypeArrayKlass::make(elem()->basic_type());
6759 ((TypeAryKlassPtr*)this)->_klass = k;
6760 }
6761 return k;
6762 }
6763
6764 //------------------------------dump2------------------------------------------
6765 // Dump Klass Type
6766 #ifndef PRODUCT
6767 void TypeAryKlassPtr::dump2( Dict & d, uint depth, outputStream *st ) const {
6768 switch( _ptr ) {
6769 case Constant:
6770 st->print("precise ");
6771 case NotNull:
6772 {
6773 st->print("[");
6774 _elem->dump2(d, depth, st);
6775 _interfaces->dump(st);
6776 st->print(": ");
6777 }
6778 case BotPTR:
6779 if( !WizardMode && !Verbose && _ptr != Constant ) break;
6780 case TopPTR:
6781 case AnyNull:
6782 st->print(":%s", ptr_msg[_ptr]);
6783 if( _ptr == Constant ) st->print(":exact");
6784 break;
6785 default:
6786 break;
6787 }
6788
6789 if( _offset ) { // Dump offset, if any
6790 if( _offset == OffsetBot ) { st->print("+any"); }
6791 else if( _offset == OffsetTop ) { st->print("+unknown"); }
6792 else { st->print("+%d", _offset); }
6793 }
6794
6795 st->print(" *");
6796 }
6797 #endif
6798
6799 const Type* TypeAryKlassPtr::base_element_type(int& dims) const {
6800 const Type* elem = this->elem();
6801 dims = 1;
6802 while (elem->isa_aryklassptr()) {
6803 elem = elem->is_aryklassptr()->elem();
6804 dims++;
6805 }
6806 return elem;
6807 }
6808
6809 //=============================================================================
6810 // Convenience common pre-built types.
6811
6812 //------------------------------make-------------------------------------------
6813 const TypeFunc *TypeFunc::make( const TypeTuple *domain, const TypeTuple *range ) {
6814 return (TypeFunc*)(new TypeFunc(domain,range))->hashcons();
6815 }
6816
6817 //------------------------------make-------------------------------------------
6818 const TypeFunc *TypeFunc::make(ciMethod* method) {
6819 Compile* C = Compile::current();
6820 const TypeFunc* tf = C->last_tf(method); // check cache
6821 if (tf != nullptr) return tf; // The hit rate here is almost 50%.
6822 const TypeTuple *domain;
6823 if (method->is_static()) {
6824 domain = TypeTuple::make_domain(nullptr, method->signature(), ignore_interfaces);
6825 } else {
6826 domain = TypeTuple::make_domain(method->holder(), method->signature(), ignore_interfaces);
6827 }
6828 const TypeTuple *range = TypeTuple::make_range(method->signature(), ignore_interfaces);
6829 tf = TypeFunc::make(domain, range);
6830 C->set_last_tf(method, tf); // fill cache
6831 return tf;
6832 }
6833
6834 //------------------------------meet-------------------------------------------
6835 // Compute the MEET of two types. It returns a new Type object.
6836 const Type *TypeFunc::xmeet( const Type *t ) const {
6837 // Perform a fast test for common case; meeting the same types together.
6838 if( this == t ) return this; // Meeting same type-rep?
6839
6840 // Current "this->_base" is Func
6841 switch (t->base()) { // switch on original type
6842
6843 case Bottom: // Ye Olde Default
6844 return t;
6845
6846 default: // All else is a mistake
6847 typerr(t);
6848
6849 case Top:
6850 break;
6851 }
6852 return this; // Return the double constant
6853 }
6854
6855 //------------------------------xdual------------------------------------------
6856 // Dual: compute field-by-field dual
6857 const Type *TypeFunc::xdual() const {
6858 return this;
6859 }
6860
6861 //------------------------------eq---------------------------------------------
6862 // Structural equality check for Type representations
6863 bool TypeFunc::eq( const Type *t ) const {
6864 const TypeFunc *a = (const TypeFunc*)t;
6865 return _domain == a->_domain &&
6866 _range == a->_range;
6867 }
6868
6869 //------------------------------hash-------------------------------------------
6870 // Type-specific hashing function.
6871 uint TypeFunc::hash(void) const {
6872 return (uint)(uintptr_t)_domain + (uint)(uintptr_t)_range;
6873 }
6874
6875 //------------------------------dump2------------------------------------------
6876 // Dump Function Type
6877 #ifndef PRODUCT
6878 void TypeFunc::dump2( Dict &d, uint depth, outputStream *st ) const {
6879 if( _range->cnt() <= Parms )
6880 st->print("void");
6881 else {
6882 uint i;
6883 for (i = Parms; i < _range->cnt()-1; i++) {
6884 _range->field_at(i)->dump2(d,depth,st);
6885 st->print("/");
6886 }
6887 _range->field_at(i)->dump2(d,depth,st);
6888 }
6889 st->print(" ");
6890 st->print("( ");
6891 if( !depth || d[this] ) { // Check for recursive dump
6892 st->print("...)");
6893 return;
6894 }
6895 d.Insert((void*)this,(void*)this); // Stop recursion
6896 if (Parms < _domain->cnt())
6897 _domain->field_at(Parms)->dump2(d,depth-1,st);
6898 for (uint i = Parms+1; i < _domain->cnt(); i++) {
6899 st->print(", ");
6900 _domain->field_at(i)->dump2(d,depth-1,st);
6901 }
6902 st->print(" )");
6903 }
6904 #endif
6905
6906 //------------------------------singleton--------------------------------------
6907 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
6908 // constants (Ldi nodes). Singletons are integer, float or double constants
6909 // or a single symbol.
6910 bool TypeFunc::singleton(void) const {
6911 return false; // Never a singleton
6912 }
6913
6914 bool TypeFunc::empty(void) const {
6915 return false; // Never empty
6916 }
6917
6918
6919 BasicType TypeFunc::return_type() const{
6920 if (range()->cnt() == TypeFunc::Parms) {
6921 return T_VOID;
6922 }
6923 return range()->field_at(TypeFunc::Parms)->basic_type();
6924 }