1 /*
2 * Copyright (c) 1997, 2024, 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 "precompiled.hpp"
26 #include "ci/ciFlatArrayKlass.hpp"
27 #include "ci/ciField.hpp"
28 #include "ci/ciInlineKlass.hpp"
29 #include "ci/ciMethodData.hpp"
30 #include "ci/ciTypeFlow.hpp"
31 #include "classfile/javaClasses.hpp"
32 #include "classfile/symbolTable.hpp"
33 #include "compiler/compileLog.hpp"
34 #include "libadt/dict.hpp"
35 #include "memory/oopFactory.hpp"
36 #include "memory/resourceArea.hpp"
37 #include "oops/instanceKlass.hpp"
38 #include "oops/instanceMirrorKlass.hpp"
39 #include "oops/objArrayKlass.hpp"
40 #include "oops/typeArrayKlass.hpp"
41 #include "opto/matcher.hpp"
42 #include "opto/node.hpp"
43 #include "opto/opcodes.hpp"
44 #include "opto/type.hpp"
45 #include "utilities/checkedCast.hpp"
46 #include "utilities/powerOfTwo.hpp"
47 #include "utilities/stringUtils.hpp"
48
49 // Portions of code courtesy of Clifford Click
50
51 // Optimization - Graph Style
52
53 // Dictionary of types shared among compilations.
54 Dict* Type::_shared_type_dict = nullptr;
55 const Type::Offset Type::Offset::top(Type::OffsetTop);
56 const Type::Offset Type::Offset::bottom(Type::OffsetBot);
57
58 const Type::Offset Type::Offset::meet(const Type::Offset other) const {
59 // Either is 'TOP' offset? Return the other offset!
60 if (_offset == OffsetTop) return other;
61 if (other._offset == OffsetTop) return *this;
62 // If either is different, return 'BOTTOM' offset
63 if (_offset != other._offset) return bottom;
64 return Offset(_offset);
65 }
66
67 const Type::Offset Type::Offset::dual() const {
68 if (_offset == OffsetTop) return bottom;// Map 'TOP' into 'BOTTOM'
69 if (_offset == OffsetBot) return top;// Map 'BOTTOM' into 'TOP'
70 return Offset(_offset); // Map everything else into self
71 }
72
73 const Type::Offset Type::Offset::add(intptr_t offset) const {
74 // Adding to 'TOP' offset? Return 'TOP'!
75 if (_offset == OffsetTop || offset == OffsetTop) return top;
76 // Adding to 'BOTTOM' offset? Return 'BOTTOM'!
77 if (_offset == OffsetBot || offset == OffsetBot) return bottom;
78 // Addition overflows or "accidentally" equals to OffsetTop? Return 'BOTTOM'!
79 offset += (intptr_t)_offset;
80 if (offset != (int)offset || offset == OffsetTop) return bottom;
81
82 // assert( _offset >= 0 && _offset+offset >= 0, "" );
83 // It is possible to construct a negative offset during PhaseCCP
84
85 return Offset((int)offset); // Sum valid offsets
86 }
87
88 void Type::Offset::dump2(outputStream *st) const {
89 if (_offset == 0) {
90 return;
91 } else if (_offset == OffsetTop) {
92 st->print("+top");
93 }
94 else if (_offset == OffsetBot) {
95 st->print("+bot");
96 } else if (_offset) {
97 st->print("+%d", _offset);
98 }
99 }
100
101 // Array which maps compiler types to Basic Types
102 const Type::TypeInfo Type::_type_info[Type::lastype] = {
103 { Bad, T_ILLEGAL, "bad", false, Node::NotAMachineReg, relocInfo::none }, // Bad
104 { Control, T_ILLEGAL, "control", false, 0, relocInfo::none }, // Control
105 { Bottom, T_VOID, "top", false, 0, relocInfo::none }, // Top
106 { Bad, T_INT, "int:", false, Op_RegI, relocInfo::none }, // Int
107 { Bad, T_LONG, "long:", false, Op_RegL, relocInfo::none }, // Long
108 { Half, T_VOID, "half", false, 0, relocInfo::none }, // Half
109 { Bad, T_NARROWOOP, "narrowoop:", false, Op_RegN, relocInfo::none }, // NarrowOop
110 { Bad, T_NARROWKLASS,"narrowklass:", false, Op_RegN, relocInfo::none }, // NarrowKlass
111 { Bad, T_ILLEGAL, "tuple:", false, Node::NotAMachineReg, relocInfo::none }, // Tuple
112 { Bad, T_ARRAY, "array:", false, Node::NotAMachineReg, relocInfo::none }, // Array
113 { Bad, T_ARRAY, "interfaces:", false, Node::NotAMachineReg, relocInfo::none }, // Interfaces
114
115 #if defined(PPC64)
116 { Bad, T_ILLEGAL, "vectormask:", false, Op_RegVectMask, relocInfo::none }, // VectorMask.
117 { Bad, T_ILLEGAL, "vectora:", false, Op_VecA, relocInfo::none }, // VectorA.
118 { Bad, T_ILLEGAL, "vectors:", false, 0, relocInfo::none }, // VectorS
119 { Bad, T_ILLEGAL, "vectord:", false, Op_RegL, relocInfo::none }, // VectorD
120 { Bad, T_ILLEGAL, "vectorx:", false, Op_VecX, relocInfo::none }, // VectorX
121 { Bad, T_ILLEGAL, "vectory:", false, 0, relocInfo::none }, // VectorY
122 { Bad, T_ILLEGAL, "vectorz:", false, 0, relocInfo::none }, // VectorZ
123 #elif defined(S390)
124 { Bad, T_ILLEGAL, "vectormask:", false, Op_RegVectMask, relocInfo::none }, // VectorMask.
125 { Bad, T_ILLEGAL, "vectora:", false, Op_VecA, relocInfo::none }, // VectorA.
126 { Bad, T_ILLEGAL, "vectors:", false, 0, relocInfo::none }, // VectorS
127 { Bad, T_ILLEGAL, "vectord:", false, Op_RegL, relocInfo::none }, // VectorD
128 { Bad, T_ILLEGAL, "vectorx:", false, 0, relocInfo::none }, // VectorX
129 { Bad, T_ILLEGAL, "vectory:", false, 0, relocInfo::none }, // VectorY
130 { Bad, T_ILLEGAL, "vectorz:", false, 0, relocInfo::none }, // VectorZ
131 #else // all other
132 { Bad, T_ILLEGAL, "vectormask:", false, Op_RegVectMask, relocInfo::none }, // VectorMask.
133 { Bad, T_ILLEGAL, "vectora:", false, Op_VecA, relocInfo::none }, // VectorA.
134 { Bad, T_ILLEGAL, "vectors:", false, Op_VecS, relocInfo::none }, // VectorS
135 { Bad, T_ILLEGAL, "vectord:", false, Op_VecD, relocInfo::none }, // VectorD
136 { Bad, T_ILLEGAL, "vectorx:", false, Op_VecX, relocInfo::none }, // VectorX
137 { Bad, T_ILLEGAL, "vectory:", false, Op_VecY, relocInfo::none }, // VectorY
138 { Bad, T_ILLEGAL, "vectorz:", false, Op_VecZ, relocInfo::none }, // VectorZ
139 #endif
140 { Bad, T_ADDRESS, "anyptr:", false, Op_RegP, relocInfo::none }, // AnyPtr
141 { Bad, T_ADDRESS, "rawptr:", false, Op_RegP, relocInfo::none }, // RawPtr
142 { Bad, T_OBJECT, "oop:", true, Op_RegP, relocInfo::oop_type }, // OopPtr
143 { Bad, T_OBJECT, "inst:", true, Op_RegP, relocInfo::oop_type }, // InstPtr
144 { Bad, T_OBJECT, "ary:", true, Op_RegP, relocInfo::oop_type }, // AryPtr
145 { Bad, T_METADATA, "metadata:", false, Op_RegP, relocInfo::metadata_type }, // MetadataPtr
146 { Bad, T_METADATA, "klass:", false, Op_RegP, relocInfo::metadata_type }, // KlassPtr
147 { Bad, T_METADATA, "instklass:", false, Op_RegP, relocInfo::metadata_type }, // InstKlassPtr
148 { Bad, T_METADATA, "aryklass:", false, Op_RegP, relocInfo::metadata_type }, // AryKlassPtr
149 { Bad, T_OBJECT, "func", false, 0, relocInfo::none }, // Function
150 { Abio, T_ILLEGAL, "abIO", false, 0, relocInfo::none }, // Abio
151 { Return_Address, T_ADDRESS, "return_address",false, Op_RegP, relocInfo::none }, // Return_Address
152 { Memory, T_ILLEGAL, "memory", false, 0, relocInfo::none }, // Memory
153 { FloatBot, T_FLOAT, "float_top", false, Op_RegF, relocInfo::none }, // FloatTop
154 { FloatCon, T_FLOAT, "ftcon:", false, Op_RegF, relocInfo::none }, // FloatCon
155 { FloatTop, T_FLOAT, "float", false, Op_RegF, relocInfo::none }, // FloatBot
156 { DoubleBot, T_DOUBLE, "double_top", false, Op_RegD, relocInfo::none }, // DoubleTop
157 { DoubleCon, T_DOUBLE, "dblcon:", false, Op_RegD, relocInfo::none }, // DoubleCon
158 { DoubleTop, T_DOUBLE, "double", false, Op_RegD, relocInfo::none }, // DoubleBot
159 { Top, T_ILLEGAL, "bottom", false, 0, relocInfo::none } // Bottom
160 };
161
162 // Map ideal registers (machine types) to ideal types
163 const Type *Type::mreg2type[_last_machine_leaf];
164
165 // Map basic types to canonical Type* pointers.
166 const Type* Type:: _const_basic_type[T_CONFLICT+1];
167
168 // Map basic types to constant-zero Types.
169 const Type* Type:: _zero_type[T_CONFLICT+1];
170
171 // Map basic types to array-body alias types.
172 const TypeAryPtr* TypeAryPtr::_array_body_type[T_CONFLICT+1];
173 const TypeInterfaces* TypeAryPtr::_array_interfaces = nullptr;
174 const TypeInterfaces* TypeAryKlassPtr::_array_interfaces = nullptr;
175
176 //=============================================================================
177 // Convenience common pre-built types.
178 const Type *Type::ABIO; // State-of-machine only
179 const Type *Type::BOTTOM; // All values
180 const Type *Type::CONTROL; // Control only
181 const Type *Type::DOUBLE; // All doubles
182 const Type *Type::FLOAT; // All floats
183 const Type *Type::HALF; // Placeholder half of doublewide type
184 const Type *Type::MEMORY; // Abstract store only
185 const Type *Type::RETURN_ADDRESS;
186 const Type *Type::TOP; // No values in set
187
188 //------------------------------get_const_type---------------------------
189 const Type* Type::get_const_type(ciType* type, InterfaceHandling interface_handling) {
190 if (type == nullptr) {
191 return nullptr;
192 } else if (type->is_primitive_type()) {
193 return get_const_basic_type(type->basic_type());
194 } else {
195 return TypeOopPtr::make_from_klass(type->as_klass(), interface_handling);
196 }
197 }
198
199 //---------------------------array_element_basic_type---------------------------------
200 // Mapping to the array element's basic type.
201 BasicType Type::array_element_basic_type() const {
202 BasicType bt = basic_type();
203 if (bt == T_INT) {
204 if (this == TypeInt::INT) return T_INT;
205 if (this == TypeInt::CHAR) return T_CHAR;
206 if (this == TypeInt::BYTE) return T_BYTE;
207 if (this == TypeInt::BOOL) return T_BOOLEAN;
208 if (this == TypeInt::SHORT) return T_SHORT;
209 return T_VOID;
210 }
211 return bt;
212 }
213
214 // For two instance arrays of same dimension, return the base element types.
215 // Otherwise or if the arrays have different dimensions, return null.
216 void Type::get_arrays_base_elements(const Type *a1, const Type *a2,
217 const TypeInstPtr **e1, const TypeInstPtr **e2) {
218
219 if (e1) *e1 = nullptr;
220 if (e2) *e2 = nullptr;
221 const TypeAryPtr* a1tap = (a1 == nullptr) ? nullptr : a1->isa_aryptr();
222 const TypeAryPtr* a2tap = (a2 == nullptr) ? nullptr : a2->isa_aryptr();
223
224 if (a1tap != nullptr && a2tap != nullptr) {
225 // Handle multidimensional arrays
226 const TypePtr* a1tp = a1tap->elem()->make_ptr();
227 const TypePtr* a2tp = a2tap->elem()->make_ptr();
228 while (a1tp && a1tp->isa_aryptr() && a2tp && a2tp->isa_aryptr()) {
229 a1tap = a1tp->is_aryptr();
230 a2tap = a2tp->is_aryptr();
231 a1tp = a1tap->elem()->make_ptr();
232 a2tp = a2tap->elem()->make_ptr();
233 }
234 if (a1tp && a1tp->isa_instptr() && a2tp && a2tp->isa_instptr()) {
235 if (e1) *e1 = a1tp->is_instptr();
236 if (e2) *e2 = a2tp->is_instptr();
237 }
238 }
239 }
240
241 //---------------------------get_typeflow_type---------------------------------
242 // Import a type produced by ciTypeFlow.
243 const Type* Type::get_typeflow_type(ciType* type) {
244 switch (type->basic_type()) {
245
246 case ciTypeFlow::StateVector::T_BOTTOM:
247 assert(type == ciTypeFlow::StateVector::bottom_type(), "");
248 return Type::BOTTOM;
249
250 case ciTypeFlow::StateVector::T_TOP:
251 assert(type == ciTypeFlow::StateVector::top_type(), "");
252 return Type::TOP;
253
254 case ciTypeFlow::StateVector::T_NULL:
255 assert(type == ciTypeFlow::StateVector::null_type(), "");
256 return TypePtr::NULL_PTR;
257
258 case ciTypeFlow::StateVector::T_LONG2:
259 // The ciTypeFlow pass pushes a long, then the half.
260 // We do the same.
261 assert(type == ciTypeFlow::StateVector::long2_type(), "");
262 return TypeInt::TOP;
263
264 case ciTypeFlow::StateVector::T_DOUBLE2:
265 // The ciTypeFlow pass pushes double, then the half.
266 // Our convention is the same.
267 assert(type == ciTypeFlow::StateVector::double2_type(), "");
268 return Type::TOP;
269
270 case T_ADDRESS:
271 assert(type->is_return_address(), "");
272 return TypeRawPtr::make((address)(intptr_t)type->as_return_address()->bci());
273
274 case T_OBJECT:
275 return Type::get_const_type(type->unwrap())->join_speculative(type->is_null_free() ? TypePtr::NOTNULL : TypePtr::BOTTOM);
276
277 default:
278 // make sure we did not mix up the cases:
279 assert(type != ciTypeFlow::StateVector::bottom_type(), "");
280 assert(type != ciTypeFlow::StateVector::top_type(), "");
281 assert(type != ciTypeFlow::StateVector::null_type(), "");
282 assert(type != ciTypeFlow::StateVector::long2_type(), "");
283 assert(type != ciTypeFlow::StateVector::double2_type(), "");
284 assert(!type->is_return_address(), "");
285
286 return Type::get_const_type(type);
287 }
288 }
289
290
291 //-----------------------make_from_constant------------------------------------
292 const Type* Type::make_from_constant(ciConstant constant, bool require_constant,
293 int stable_dimension, bool is_narrow_oop,
294 bool is_autobox_cache) {
295 switch (constant.basic_type()) {
296 case T_BOOLEAN: return TypeInt::make(constant.as_boolean());
297 case T_CHAR: return TypeInt::make(constant.as_char());
298 case T_BYTE: return TypeInt::make(constant.as_byte());
299 case T_SHORT: return TypeInt::make(constant.as_short());
300 case T_INT: return TypeInt::make(constant.as_int());
301 case T_LONG: return TypeLong::make(constant.as_long());
302 case T_FLOAT: return TypeF::make(constant.as_float());
303 case T_DOUBLE: return TypeD::make(constant.as_double());
304 case T_ARRAY:
305 case T_OBJECT: {
306 const Type* con_type = nullptr;
307 ciObject* oop_constant = constant.as_object();
308 if (oop_constant->is_null_object()) {
309 con_type = Type::get_zero_type(T_OBJECT);
310 } else {
311 guarantee(require_constant || oop_constant->should_be_constant(), "con_type must get computed");
312 con_type = TypeOopPtr::make_from_constant(oop_constant, require_constant);
313 if (Compile::current()->eliminate_boxing() && is_autobox_cache) {
314 con_type = con_type->is_aryptr()->cast_to_autobox_cache();
315 }
316 if (stable_dimension > 0) {
317 assert(FoldStableValues, "sanity");
318 assert(!con_type->is_zero_type(), "default value for stable field");
319 con_type = con_type->is_aryptr()->cast_to_stable(true, stable_dimension);
320 }
321 }
322 if (is_narrow_oop) {
323 con_type = con_type->make_narrowoop();
324 }
325 return con_type;
326 }
327 case T_ILLEGAL:
328 // Invalid ciConstant returned due to OutOfMemoryError in the CI
329 assert(Compile::current()->env()->failing(), "otherwise should not see this");
330 return nullptr;
331 default:
332 // Fall through to failure
333 return nullptr;
334 }
335 }
336
337 static ciConstant check_mismatched_access(ciConstant con, BasicType loadbt, bool is_unsigned) {
338 BasicType conbt = con.basic_type();
339 switch (conbt) {
340 case T_BOOLEAN: conbt = T_BYTE; break;
341 case T_ARRAY: conbt = T_OBJECT; break;
342 default: break;
343 }
344 switch (loadbt) {
345 case T_BOOLEAN: loadbt = T_BYTE; break;
346 case T_NARROWOOP: loadbt = T_OBJECT; break;
347 case T_ARRAY: loadbt = T_OBJECT; break;
348 case T_ADDRESS: loadbt = T_OBJECT; break;
349 default: break;
350 }
351 if (conbt == loadbt) {
352 if (is_unsigned && conbt == T_BYTE) {
353 // LoadB (T_BYTE) with a small mask (<=8-bit) is converted to LoadUB (T_BYTE).
354 return ciConstant(T_INT, con.as_int() & 0xFF);
355 } else {
356 return con;
357 }
358 }
359 if (conbt == T_SHORT && loadbt == T_CHAR) {
360 // LoadS (T_SHORT) with a small mask (<=16-bit) is converted to LoadUS (T_CHAR).
361 return ciConstant(T_INT, con.as_int() & 0xFFFF);
362 }
363 return ciConstant(); // T_ILLEGAL
364 }
365
366 // Try to constant-fold a stable array element.
367 const Type* Type::make_constant_from_array_element(ciArray* array, int off, int stable_dimension,
368 BasicType loadbt, bool is_unsigned_load) {
369 // Decode the results of GraphKit::array_element_address.
370 ciConstant element_value = array->element_value_by_offset(off);
371 if (element_value.basic_type() == T_ILLEGAL) {
372 return nullptr; // wrong offset
373 }
374 ciConstant con = check_mismatched_access(element_value, loadbt, is_unsigned_load);
375
376 assert(con.basic_type() != T_ILLEGAL, "elembt=%s; loadbt=%s; unsigned=%d",
377 type2name(element_value.basic_type()), type2name(loadbt), is_unsigned_load);
378
379 if (con.is_valid() && // not a mismatched access
380 !con.is_null_or_zero()) { // not a default value
381 bool is_narrow_oop = (loadbt == T_NARROWOOP);
382 return Type::make_from_constant(con, /*require_constant=*/true, stable_dimension, is_narrow_oop, /*is_autobox_cache=*/false);
383 }
384 return nullptr;
385 }
386
387 const Type* Type::make_constant_from_field(ciInstance* holder, int off, bool is_unsigned_load, BasicType loadbt) {
388 ciField* field;
389 ciType* type = holder->java_mirror_type();
390 if (type != nullptr && type->is_instance_klass() && off >= InstanceMirrorKlass::offset_of_static_fields()) {
391 // Static field
392 field = type->as_instance_klass()->get_field_by_offset(off, /*is_static=*/true);
393 } else {
394 // Instance field
395 field = holder->klass()->as_instance_klass()->get_field_by_offset(off, /*is_static=*/false);
396 }
397 if (field == nullptr) {
398 return nullptr; // Wrong offset
399 }
400 return Type::make_constant_from_field(field, holder, loadbt, is_unsigned_load);
401 }
402
403 const Type* Type::make_constant_from_field(ciField* field, ciInstance* holder,
404 BasicType loadbt, bool is_unsigned_load) {
405 if (!field->is_constant()) {
406 return nullptr; // Non-constant field
407 }
408 ciConstant field_value;
409 if (field->is_static()) {
410 // final static field
411 field_value = field->constant_value();
412 } else if (holder != nullptr) {
413 // final or stable non-static field
414 // Treat final non-static fields of trusted classes (classes in
415 // java.lang.invoke and sun.invoke packages and subpackages) as
416 // compile time constants.
417 field_value = field->constant_value_of(holder);
418 }
419 if (!field_value.is_valid()) {
420 return nullptr; // Not a constant
421 }
422
423 ciConstant con = check_mismatched_access(field_value, loadbt, is_unsigned_load);
424
425 assert(con.is_valid(), "elembt=%s; loadbt=%s; unsigned=%d",
426 type2name(field_value.basic_type()), type2name(loadbt), is_unsigned_load);
427
428 bool is_stable_array = FoldStableValues && field->is_stable() && field->type()->is_array_klass();
429 int stable_dimension = (is_stable_array ? field->type()->as_array_klass()->dimension() : 0);
430 bool is_narrow_oop = (loadbt == T_NARROWOOP);
431
432 const Type* con_type = make_from_constant(con, /*require_constant=*/ true,
433 stable_dimension, is_narrow_oop,
434 field->is_autobox_cache());
435 if (con_type != nullptr && field->is_call_site_target()) {
436 ciCallSite* call_site = holder->as_call_site();
437 if (!call_site->is_fully_initialized_constant_call_site()) {
438 ciMethodHandle* target = con.as_object()->as_method_handle();
439 Compile::current()->dependencies()->assert_call_site_target_value(call_site, target);
440 }
441 }
442 return con_type;
443 }
444
445 //------------------------------make-------------------------------------------
446 // Create a simple Type, with default empty symbol sets. Then hashcons it
447 // and look for an existing copy in the type dictionary.
448 const Type *Type::make( enum TYPES t ) {
449 return (new Type(t))->hashcons();
450 }
451
452 //------------------------------cmp--------------------------------------------
453 bool Type::equals(const Type* t1, const Type* t2) {
454 if (t1->_base != t2->_base) {
455 return false; // Missed badly
456 }
457
458 assert(t1 != t2 || t1->eq(t2), "eq must be reflexive");
459 return t1->eq(t2);
460 }
461
462 const Type* Type::maybe_remove_speculative(bool include_speculative) const {
463 if (!include_speculative) {
464 return remove_speculative();
465 }
466 return this;
467 }
468
469 //------------------------------hash-------------------------------------------
470 int Type::uhash( const Type *const t ) {
471 return (int)t->hash();
472 }
473
474 #define SMALLINT ((juint)3) // a value too insignificant to consider widening
475 #define POSITIVE_INFINITE_F 0x7f800000 // hex representation for IEEE 754 single precision positive infinite
476 #define POSITIVE_INFINITE_D 0x7ff0000000000000 // hex representation for IEEE 754 double precision positive infinite
477
478 //--------------------------Initialize_shared----------------------------------
479 void Type::Initialize_shared(Compile* current) {
480 // This method does not need to be locked because the first system
481 // compilations (stub compilations) occur serially. If they are
482 // changed to proceed in parallel, then this section will need
483 // locking.
484
485 Arena* save = current->type_arena();
486 Arena* shared_type_arena = new (mtCompiler)Arena(mtCompiler);
487
488 current->set_type_arena(shared_type_arena);
489
490 // Map the boolean result of Type::equals into a comparator result that CmpKey expects.
491 CmpKey type_cmp = [](const void* t1, const void* t2) -> int32_t {
492 return Type::equals((Type*) t1, (Type*) t2) ? 0 : 1;
493 };
494
495 _shared_type_dict = new (shared_type_arena) Dict(type_cmp, (Hash) Type::uhash, shared_type_arena, 128);
496 current->set_type_dict(_shared_type_dict);
497
498 // Make shared pre-built types.
499 CONTROL = make(Control); // Control only
500 TOP = make(Top); // No values in set
501 MEMORY = make(Memory); // Abstract store only
502 ABIO = make(Abio); // State-of-machine only
503 RETURN_ADDRESS=make(Return_Address);
504 FLOAT = make(FloatBot); // All floats
505 DOUBLE = make(DoubleBot); // All doubles
506 BOTTOM = make(Bottom); // Everything
507 HALF = make(Half); // Placeholder half of doublewide type
508
509 TypeF::MAX = TypeF::make(max_jfloat); // Float MAX
510 TypeF::MIN = TypeF::make(min_jfloat); // Float MIN
511 TypeF::ZERO = TypeF::make(0.0); // Float 0 (positive zero)
512 TypeF::ONE = TypeF::make(1.0); // Float 1
513 TypeF::POS_INF = TypeF::make(jfloat_cast(POSITIVE_INFINITE_F));
514 TypeF::NEG_INF = TypeF::make(-jfloat_cast(POSITIVE_INFINITE_F));
515
516 TypeD::MAX = TypeD::make(max_jdouble); // Double MAX
517 TypeD::MIN = TypeD::make(min_jdouble); // Double MIN
518 TypeD::ZERO = TypeD::make(0.0); // Double 0 (positive zero)
519 TypeD::ONE = TypeD::make(1.0); // Double 1
520 TypeD::POS_INF = TypeD::make(jdouble_cast(POSITIVE_INFINITE_D));
521 TypeD::NEG_INF = TypeD::make(-jdouble_cast(POSITIVE_INFINITE_D));
522
523 TypeInt::MAX = TypeInt::make(max_jint); // Int MAX
524 TypeInt::MIN = TypeInt::make(min_jint); // Int MIN
525 TypeInt::MINUS_1 = TypeInt::make(-1); // -1
526 TypeInt::ZERO = TypeInt::make( 0); // 0
527 TypeInt::ONE = TypeInt::make( 1); // 1
528 TypeInt::BOOL = TypeInt::make(0,1, WidenMin); // 0 or 1, FALSE or TRUE.
529 TypeInt::CC = TypeInt::make(-1, 1, WidenMin); // -1, 0 or 1, condition codes
530 TypeInt::CC_LT = TypeInt::make(-1,-1, WidenMin); // == TypeInt::MINUS_1
531 TypeInt::CC_GT = TypeInt::make( 1, 1, WidenMin); // == TypeInt::ONE
532 TypeInt::CC_EQ = TypeInt::make( 0, 0, WidenMin); // == TypeInt::ZERO
533 TypeInt::CC_LE = TypeInt::make(-1, 0, WidenMin);
534 TypeInt::CC_GE = TypeInt::make( 0, 1, WidenMin); // == TypeInt::BOOL
535 TypeInt::BYTE = TypeInt::make(-128,127, WidenMin); // Bytes
536 TypeInt::UBYTE = TypeInt::make(0, 255, WidenMin); // Unsigned Bytes
537 TypeInt::CHAR = TypeInt::make(0,65535, WidenMin); // Java chars
538 TypeInt::SHORT = TypeInt::make(-32768,32767, WidenMin); // Java shorts
539 TypeInt::POS = TypeInt::make(0,max_jint, WidenMin); // Non-neg values
540 TypeInt::POS1 = TypeInt::make(1,max_jint, WidenMin); // Positive values
541 TypeInt::INT = TypeInt::make(min_jint,max_jint, WidenMax); // 32-bit integers
542 TypeInt::SYMINT = TypeInt::make(-max_jint,max_jint,WidenMin); // symmetric range
543 TypeInt::TYPE_DOMAIN = TypeInt::INT;
544 // CmpL is overloaded both as the bytecode computation returning
545 // a trinary (-1,0,+1) integer result AND as an efficient long
546 // compare returning optimizer ideal-type flags.
547 assert( TypeInt::CC_LT == TypeInt::MINUS_1, "types must match for CmpL to work" );
548 assert( TypeInt::CC_GT == TypeInt::ONE, "types must match for CmpL to work" );
549 assert( TypeInt::CC_EQ == TypeInt::ZERO, "types must match for CmpL to work" );
550 assert( TypeInt::CC_GE == TypeInt::BOOL, "types must match for CmpL to work" );
551 assert( (juint)(TypeInt::CC->_hi - TypeInt::CC->_lo) <= SMALLINT, "CC is truly small");
552
553 TypeLong::MAX = TypeLong::make(max_jlong); // Long MAX
554 TypeLong::MIN = TypeLong::make(min_jlong); // Long MIN
555 TypeLong::MINUS_1 = TypeLong::make(-1); // -1
556 TypeLong::ZERO = TypeLong::make( 0); // 0
557 TypeLong::ONE = TypeLong::make( 1); // 1
558 TypeLong::POS = TypeLong::make(0,max_jlong, WidenMin); // Non-neg values
559 TypeLong::LONG = TypeLong::make(min_jlong,max_jlong,WidenMax); // 64-bit integers
560 TypeLong::INT = TypeLong::make((jlong)min_jint,(jlong)max_jint,WidenMin);
561 TypeLong::UINT = TypeLong::make(0,(jlong)max_juint,WidenMin);
562 TypeLong::TYPE_DOMAIN = TypeLong::LONG;
563
564 const Type **fboth =(const Type**)shared_type_arena->AmallocWords(2*sizeof(Type*));
565 fboth[0] = Type::CONTROL;
566 fboth[1] = Type::CONTROL;
567 TypeTuple::IFBOTH = TypeTuple::make( 2, fboth );
568
569 const Type **ffalse =(const Type**)shared_type_arena->AmallocWords(2*sizeof(Type*));
570 ffalse[0] = Type::CONTROL;
571 ffalse[1] = Type::TOP;
572 TypeTuple::IFFALSE = TypeTuple::make( 2, ffalse );
573
574 const Type **fneither =(const Type**)shared_type_arena->AmallocWords(2*sizeof(Type*));
575 fneither[0] = Type::TOP;
576 fneither[1] = Type::TOP;
577 TypeTuple::IFNEITHER = TypeTuple::make( 2, fneither );
578
579 const Type **ftrue =(const Type**)shared_type_arena->AmallocWords(2*sizeof(Type*));
580 ftrue[0] = Type::TOP;
581 ftrue[1] = Type::CONTROL;
582 TypeTuple::IFTRUE = TypeTuple::make( 2, ftrue );
583
584 const Type **floop =(const Type**)shared_type_arena->AmallocWords(2*sizeof(Type*));
585 floop[0] = Type::CONTROL;
586 floop[1] = TypeInt::INT;
587 TypeTuple::LOOPBODY = TypeTuple::make( 2, floop );
588
589 TypePtr::NULL_PTR= TypePtr::make(AnyPtr, TypePtr::Null, Offset(0));
590 TypePtr::NOTNULL = TypePtr::make(AnyPtr, TypePtr::NotNull, Offset::bottom);
591 TypePtr::BOTTOM = TypePtr::make(AnyPtr, TypePtr::BotPTR, Offset::bottom);
592
593 TypeRawPtr::BOTTOM = TypeRawPtr::make( TypePtr::BotPTR );
594 TypeRawPtr::NOTNULL= TypeRawPtr::make( TypePtr::NotNull );
595
596 const Type **fmembar = TypeTuple::fields(0);
597 TypeTuple::MEMBAR = TypeTuple::make(TypeFunc::Parms+0, fmembar);
598
599 const Type **fsc = (const Type**)shared_type_arena->AmallocWords(2*sizeof(Type*));
600 fsc[0] = TypeInt::CC;
601 fsc[1] = Type::MEMORY;
602 TypeTuple::STORECONDITIONAL = TypeTuple::make(2, fsc);
603
604 TypeInstPtr::NOTNULL = TypeInstPtr::make(TypePtr::NotNull, current->env()->Object_klass());
605 TypeInstPtr::BOTTOM = TypeInstPtr::make(TypePtr::BotPTR, current->env()->Object_klass());
606 TypeInstPtr::MIRROR = TypeInstPtr::make(TypePtr::NotNull, current->env()->Class_klass());
607 TypeInstPtr::MARK = TypeInstPtr::make(TypePtr::BotPTR, current->env()->Object_klass(),
608 false, nullptr, Offset(oopDesc::mark_offset_in_bytes()));
609 TypeInstPtr::KLASS = TypeInstPtr::make(TypePtr::BotPTR, current->env()->Object_klass(),
610 false, nullptr, Offset(oopDesc::klass_offset_in_bytes()));
611 TypeOopPtr::BOTTOM = TypeOopPtr::make(TypePtr::BotPTR, Offset::bottom, TypeOopPtr::InstanceBot);
612
613 TypeMetadataPtr::BOTTOM = TypeMetadataPtr::make(TypePtr::BotPTR, nullptr, Offset::bottom);
614
615 TypeNarrowOop::NULL_PTR = TypeNarrowOop::make( TypePtr::NULL_PTR );
616 TypeNarrowOop::BOTTOM = TypeNarrowOop::make( TypeInstPtr::BOTTOM );
617
618 TypeNarrowKlass::NULL_PTR = TypeNarrowKlass::make( TypePtr::NULL_PTR );
619
620 mreg2type[Op_Node] = Type::BOTTOM;
621 mreg2type[Op_Set ] = nullptr;
622 mreg2type[Op_RegN] = TypeNarrowOop::BOTTOM;
623 mreg2type[Op_RegI] = TypeInt::INT;
624 mreg2type[Op_RegP] = TypePtr::BOTTOM;
625 mreg2type[Op_RegF] = Type::FLOAT;
626 mreg2type[Op_RegD] = Type::DOUBLE;
627 mreg2type[Op_RegL] = TypeLong::LONG;
628 mreg2type[Op_RegFlags] = TypeInt::CC;
629
630 GrowableArray<ciInstanceKlass*> array_interfaces;
631 array_interfaces.push(current->env()->Cloneable_klass());
632 array_interfaces.push(current->env()->Serializable_klass());
633 TypeAryPtr::_array_interfaces = TypeInterfaces::make(&array_interfaces);
634 TypeAryKlassPtr::_array_interfaces = TypeAryPtr::_array_interfaces;
635
636 TypeAryPtr::RANGE = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(Type::BOTTOM,TypeInt::POS), nullptr /* current->env()->Object_klass() */, false, Offset(arrayOopDesc::length_offset_in_bytes()));
637
638 TypeAryPtr::NARROWOOPS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeNarrowOop::BOTTOM, TypeInt::POS), nullptr /*ciArrayKlass::make(o)*/, false, Offset::bottom);
639
640 #ifdef _LP64
641 if (UseCompressedOops) {
642 assert(TypeAryPtr::NARROWOOPS->is_ptr_to_narrowoop(), "array of narrow oops must be ptr to narrow oop");
643 TypeAryPtr::OOPS = TypeAryPtr::NARROWOOPS;
644 } else
645 #endif
646 {
647 // There is no shared klass for Object[]. See note in TypeAryPtr::klass().
648 TypeAryPtr::OOPS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInstPtr::BOTTOM,TypeInt::POS), nullptr /*ciArrayKlass::make(o)*/, false, Offset::bottom);
649 }
650 TypeAryPtr::BYTES = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::BYTE ,TypeInt::POS), ciTypeArrayKlass::make(T_BYTE), true, Offset::bottom);
651 TypeAryPtr::SHORTS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::SHORT ,TypeInt::POS), ciTypeArrayKlass::make(T_SHORT), true, Offset::bottom);
652 TypeAryPtr::CHARS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::CHAR ,TypeInt::POS), ciTypeArrayKlass::make(T_CHAR), true, Offset::bottom);
653 TypeAryPtr::INTS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInt::INT ,TypeInt::POS), ciTypeArrayKlass::make(T_INT), true, Offset::bottom);
654 TypeAryPtr::LONGS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeLong::LONG ,TypeInt::POS), ciTypeArrayKlass::make(T_LONG), true, Offset::bottom);
655 TypeAryPtr::FLOATS = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(Type::FLOAT ,TypeInt::POS), ciTypeArrayKlass::make(T_FLOAT), true, Offset::bottom);
656 TypeAryPtr::DOUBLES = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(Type::DOUBLE ,TypeInt::POS), ciTypeArrayKlass::make(T_DOUBLE), true, Offset::bottom);
657 TypeAryPtr::INLINES = TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(TypeInstPtr::BOTTOM,TypeInt::POS, /* stable= */ false, /* flat= */ true), nullptr, false, Offset::bottom);
658
659 // Nobody should ask _array_body_type[T_NARROWOOP]. Use null as assert.
660 TypeAryPtr::_array_body_type[T_NARROWOOP] = nullptr;
661 TypeAryPtr::_array_body_type[T_OBJECT] = TypeAryPtr::OOPS;
662 TypeAryPtr::_array_body_type[T_PRIMITIVE_OBJECT] = TypeAryPtr::OOPS;
663 TypeAryPtr::_array_body_type[T_ARRAY] = TypeAryPtr::OOPS; // arrays are stored in oop arrays
664 TypeAryPtr::_array_body_type[T_BYTE] = TypeAryPtr::BYTES;
665 TypeAryPtr::_array_body_type[T_BOOLEAN] = TypeAryPtr::BYTES; // boolean[] is a byte array
666 TypeAryPtr::_array_body_type[T_SHORT] = TypeAryPtr::SHORTS;
667 TypeAryPtr::_array_body_type[T_CHAR] = TypeAryPtr::CHARS;
668 TypeAryPtr::_array_body_type[T_INT] = TypeAryPtr::INTS;
669 TypeAryPtr::_array_body_type[T_LONG] = TypeAryPtr::LONGS;
670 TypeAryPtr::_array_body_type[T_FLOAT] = TypeAryPtr::FLOATS;
671 TypeAryPtr::_array_body_type[T_DOUBLE] = TypeAryPtr::DOUBLES;
672
673 TypeInstKlassPtr::OBJECT = TypeInstKlassPtr::make(TypePtr::NotNull, current->env()->Object_klass(), Offset(0));
674 TypeInstKlassPtr::OBJECT_OR_NULL = TypeInstKlassPtr::make(TypePtr::BotPTR, current->env()->Object_klass(), Offset(0));
675
676 const Type **fi2c = TypeTuple::fields(2);
677 fi2c[TypeFunc::Parms+0] = TypeInstPtr::BOTTOM; // Method*
678 fi2c[TypeFunc::Parms+1] = TypeRawPtr::BOTTOM; // argument pointer
679 TypeTuple::START_I2C = TypeTuple::make(TypeFunc::Parms+2, fi2c);
680
681 const Type **intpair = TypeTuple::fields(2);
682 intpair[0] = TypeInt::INT;
683 intpair[1] = TypeInt::INT;
684 TypeTuple::INT_PAIR = TypeTuple::make(2, intpair);
685
686 const Type **longpair = TypeTuple::fields(2);
687 longpair[0] = TypeLong::LONG;
688 longpair[1] = TypeLong::LONG;
689 TypeTuple::LONG_PAIR = TypeTuple::make(2, longpair);
690
691 const Type **intccpair = TypeTuple::fields(2);
692 intccpair[0] = TypeInt::INT;
693 intccpair[1] = TypeInt::CC;
694 TypeTuple::INT_CC_PAIR = TypeTuple::make(2, intccpair);
695
696 const Type **longccpair = TypeTuple::fields(2);
697 longccpair[0] = TypeLong::LONG;
698 longccpair[1] = TypeInt::CC;
699 TypeTuple::LONG_CC_PAIR = TypeTuple::make(2, longccpair);
700
701 _const_basic_type[T_NARROWOOP] = TypeNarrowOop::BOTTOM;
702 _const_basic_type[T_NARROWKLASS] = Type::BOTTOM;
703 _const_basic_type[T_BOOLEAN] = TypeInt::BOOL;
704 _const_basic_type[T_CHAR] = TypeInt::CHAR;
705 _const_basic_type[T_BYTE] = TypeInt::BYTE;
706 _const_basic_type[T_SHORT] = TypeInt::SHORT;
707 _const_basic_type[T_INT] = TypeInt::INT;
708 _const_basic_type[T_LONG] = TypeLong::LONG;
709 _const_basic_type[T_FLOAT] = Type::FLOAT;
710 _const_basic_type[T_DOUBLE] = Type::DOUBLE;
711 _const_basic_type[T_OBJECT] = TypeInstPtr::BOTTOM;
712 _const_basic_type[T_ARRAY] = TypeInstPtr::BOTTOM; // there is no separate bottom for arrays
713 _const_basic_type[T_PRIMITIVE_OBJECT] = TypeInstPtr::BOTTOM;
714 _const_basic_type[T_VOID] = TypePtr::NULL_PTR; // reflection represents void this way
715 _const_basic_type[T_ADDRESS] = TypeRawPtr::BOTTOM; // both interpreter return addresses & random raw ptrs
716 _const_basic_type[T_CONFLICT] = Type::BOTTOM; // why not?
717
718 _zero_type[T_NARROWOOP] = TypeNarrowOop::NULL_PTR;
719 _zero_type[T_NARROWKLASS] = TypeNarrowKlass::NULL_PTR;
720 _zero_type[T_BOOLEAN] = TypeInt::ZERO; // false == 0
721 _zero_type[T_CHAR] = TypeInt::ZERO; // '\0' == 0
722 _zero_type[T_BYTE] = TypeInt::ZERO; // 0x00 == 0
723 _zero_type[T_SHORT] = TypeInt::ZERO; // 0x0000 == 0
724 _zero_type[T_INT] = TypeInt::ZERO;
725 _zero_type[T_LONG] = TypeLong::ZERO;
726 _zero_type[T_FLOAT] = TypeF::ZERO;
727 _zero_type[T_DOUBLE] = TypeD::ZERO;
728 _zero_type[T_OBJECT] = TypePtr::NULL_PTR;
729 _zero_type[T_ARRAY] = TypePtr::NULL_PTR; // null array is null oop
730 _zero_type[T_PRIMITIVE_OBJECT] = TypePtr::NULL_PTR;
731 _zero_type[T_ADDRESS] = TypePtr::NULL_PTR; // raw pointers use the same null
732 _zero_type[T_VOID] = Type::TOP; // the only void value is no value at all
733
734 // get_zero_type() should not happen for T_CONFLICT
735 _zero_type[T_CONFLICT]= nullptr;
736
737 TypeVect::VECTMASK = (TypeVect*)(new TypeVectMask(T_BOOLEAN, MaxVectorSize))->hashcons();
738 mreg2type[Op_RegVectMask] = TypeVect::VECTMASK;
739
740 if (Matcher::supports_scalable_vector()) {
741 TypeVect::VECTA = TypeVect::make(T_BYTE, Matcher::scalable_vector_reg_size(T_BYTE));
742 }
743
744 // Vector predefined types, it needs initialized _const_basic_type[].
745 if (Matcher::vector_size_supported(T_BYTE, 4)) {
746 TypeVect::VECTS = TypeVect::make(T_BYTE, 4);
747 }
748 if (Matcher::vector_size_supported(T_FLOAT, 2)) {
749 TypeVect::VECTD = TypeVect::make(T_FLOAT, 2);
750 }
751 if (Matcher::vector_size_supported(T_FLOAT, 4)) {
752 TypeVect::VECTX = TypeVect::make(T_FLOAT, 4);
753 }
754 if (Matcher::vector_size_supported(T_FLOAT, 8)) {
755 TypeVect::VECTY = TypeVect::make(T_FLOAT, 8);
756 }
757 if (Matcher::vector_size_supported(T_FLOAT, 16)) {
758 TypeVect::VECTZ = TypeVect::make(T_FLOAT, 16);
759 }
760
761 mreg2type[Op_VecA] = TypeVect::VECTA;
762 mreg2type[Op_VecS] = TypeVect::VECTS;
763 mreg2type[Op_VecD] = TypeVect::VECTD;
764 mreg2type[Op_VecX] = TypeVect::VECTX;
765 mreg2type[Op_VecY] = TypeVect::VECTY;
766 mreg2type[Op_VecZ] = TypeVect::VECTZ;
767
768 // Restore working type arena.
769 current->set_type_arena(save);
770 current->set_type_dict(nullptr);
771 }
772
773 //------------------------------Initialize-------------------------------------
774 void Type::Initialize(Compile* current) {
775 assert(current->type_arena() != nullptr, "must have created type arena");
776
777 if (_shared_type_dict == nullptr) {
778 Initialize_shared(current);
779 }
780
781 Arena* type_arena = current->type_arena();
782
783 // Create the hash-cons'ing dictionary with top-level storage allocation
784 Dict *tdic = new (type_arena) Dict(*_shared_type_dict, type_arena);
785 current->set_type_dict(tdic);
786 }
787
788 //------------------------------hashcons---------------------------------------
789 // Do the hash-cons trick. If the Type already exists in the type table,
790 // delete the current Type and return the existing Type. Otherwise stick the
791 // current Type in the Type table.
792 const Type *Type::hashcons(void) {
793 debug_only(base()); // Check the assertion in Type::base().
794 // Look up the Type in the Type dictionary
795 Dict *tdic = type_dict();
796 Type* old = (Type*)(tdic->Insert(this, this, false));
797 if( old ) { // Pre-existing Type?
798 if( old != this ) // Yes, this guy is not the pre-existing?
799 delete this; // Yes, Nuke this guy
800 assert( old->_dual, "" );
801 return old; // Return pre-existing
802 }
803
804 // Every type has a dual (to make my lattice symmetric).
805 // Since we just discovered a new Type, compute its dual right now.
806 assert( !_dual, "" ); // No dual yet
807 _dual = xdual(); // Compute the dual
808 if (equals(this, _dual)) { // Handle self-symmetric
809 if (_dual != this) {
810 delete _dual;
811 _dual = this;
812 }
813 return this;
814 }
815 assert( !_dual->_dual, "" ); // No reverse dual yet
816 assert( !(*tdic)[_dual], "" ); // Dual not in type system either
817 // New Type, insert into Type table
818 tdic->Insert((void*)_dual,(void*)_dual);
819 ((Type*)_dual)->_dual = this; // Finish up being symmetric
820 #ifdef ASSERT
821 Type *dual_dual = (Type*)_dual->xdual();
822 assert( eq(dual_dual), "xdual(xdual()) should be identity" );
823 delete dual_dual;
824 #endif
825 return this; // Return new Type
826 }
827
828 //------------------------------eq---------------------------------------------
829 // Structural equality check for Type representations
830 bool Type::eq( const Type * ) const {
831 return true; // Nothing else can go wrong
832 }
833
834 //------------------------------hash-------------------------------------------
835 // Type-specific hashing function.
836 uint Type::hash(void) const {
837 return _base;
838 }
839
840 //------------------------------is_finite--------------------------------------
841 // Has a finite value
842 bool Type::is_finite() const {
843 return false;
844 }
845
846 //------------------------------is_nan-----------------------------------------
847 // Is not a number (NaN)
848 bool Type::is_nan() const {
849 return false;
850 }
851
852 #ifdef ASSERT
853 class VerifyMeet;
854 class VerifyMeetResult : public ArenaObj {
855 friend class VerifyMeet;
856 friend class Type;
857 private:
858 class VerifyMeetResultEntry {
859 private:
860 const Type* _in1;
861 const Type* _in2;
862 const Type* _res;
863 public:
864 VerifyMeetResultEntry(const Type* in1, const Type* in2, const Type* res):
865 _in1(in1), _in2(in2), _res(res) {
866 }
867 VerifyMeetResultEntry():
868 _in1(nullptr), _in2(nullptr), _res(nullptr) {
869 }
870
871 bool operator==(const VerifyMeetResultEntry& rhs) const {
872 return _in1 == rhs._in1 &&
873 _in2 == rhs._in2 &&
874 _res == rhs._res;
875 }
876
877 bool operator!=(const VerifyMeetResultEntry& rhs) const {
878 return !(rhs == *this);
879 }
880
881 static int compare(const VerifyMeetResultEntry& v1, const VerifyMeetResultEntry& v2) {
882 if ((intptr_t) v1._in1 < (intptr_t) v2._in1) {
883 return -1;
884 } else if (v1._in1 == v2._in1) {
885 if ((intptr_t) v1._in2 < (intptr_t) v2._in2) {
886 return -1;
887 } else if (v1._in2 == v2._in2) {
888 assert(v1._res == v2._res || v1._res == nullptr || v2._res == nullptr, "same inputs should lead to same result");
889 return 0;
890 }
891 return 1;
892 }
893 return 1;
894 }
895 const Type* res() const { return _res; }
896 };
897 uint _depth;
898 GrowableArray<VerifyMeetResultEntry> _cache;
899
900 // With verification code, the meet of A and B causes the computation of:
901 // 1- meet(A, B)
902 // 2- meet(B, A)
903 // 3- meet(dual(meet(A, B)), dual(A))
904 // 4- meet(dual(meet(A, B)), dual(B))
905 // 5- meet(dual(A), dual(B))
906 // 6- meet(dual(B), dual(A))
907 // 7- meet(dual(meet(dual(A), dual(B))), A)
908 // 8- meet(dual(meet(dual(A), dual(B))), B)
909 //
910 // In addition the meet of A[] and B[] requires the computation of the meet of A and B.
911 //
912 // The meet of A[] and B[] triggers the computation of:
913 // 1- meet(A[], B[][)
914 // 1.1- meet(A, B)
915 // 1.2- meet(B, A)
916 // 1.3- meet(dual(meet(A, B)), dual(A))
917 // 1.4- meet(dual(meet(A, B)), dual(B))
918 // 1.5- meet(dual(A), dual(B))
919 // 1.6- meet(dual(B), dual(A))
920 // 1.7- meet(dual(meet(dual(A), dual(B))), A)
921 // 1.8- meet(dual(meet(dual(A), dual(B))), B)
922 // 2- meet(B[], A[])
923 // 2.1- meet(B, A) = 1.2
924 // 2.2- meet(A, B) = 1.1
925 // 2.3- meet(dual(meet(B, A)), dual(B)) = 1.4
926 // 2.4- meet(dual(meet(B, A)), dual(A)) = 1.3
927 // 2.5- meet(dual(B), dual(A)) = 1.6
928 // 2.6- meet(dual(A), dual(B)) = 1.5
929 // 2.7- meet(dual(meet(dual(B), dual(A))), B) = 1.8
930 // 2.8- meet(dual(meet(dual(B), dual(A))), B) = 1.7
931 // etc.
932 // The number of meet operations performed grows exponentially with the number of dimensions of the arrays but the number
933 // of different meet operations is linear in the number of dimensions. The function below caches meet results for the
934 // duration of the meet at the root of the recursive calls.
935 //
936 const Type* meet(const Type* t1, const Type* t2) {
937 bool found = false;
938 const VerifyMeetResultEntry meet(t1, t2, nullptr);
939 int pos = _cache.find_sorted<VerifyMeetResultEntry, VerifyMeetResultEntry::compare>(meet, found);
940 const Type* res = nullptr;
941 if (found) {
942 res = _cache.at(pos).res();
943 } else {
944 res = t1->xmeet(t2);
945 _cache.insert_sorted<VerifyMeetResultEntry::compare>(VerifyMeetResultEntry(t1, t2, res));
946 found = false;
947 _cache.find_sorted<VerifyMeetResultEntry, VerifyMeetResultEntry::compare>(meet, found);
948 assert(found, "should be in table after it's added");
949 }
950 return res;
951 }
952
953 void add(const Type* t1, const Type* t2, const Type* res) {
954 _cache.insert_sorted<VerifyMeetResultEntry::compare>(VerifyMeetResultEntry(t1, t2, res));
955 }
956
957 bool empty_cache() const {
958 return _cache.length() == 0;
959 }
960 public:
961 VerifyMeetResult(Compile* C) :
962 _depth(0), _cache(C->comp_arena(), 2, 0, VerifyMeetResultEntry()) {
963 }
964 };
965
966 void Type::assert_type_verify_empty() const {
967 assert(Compile::current()->_type_verify == nullptr || Compile::current()->_type_verify->empty_cache(), "cache should have been discarded");
968 }
969
970 class VerifyMeet {
971 private:
972 Compile* _C;
973 public:
974 VerifyMeet(Compile* C) : _C(C) {
975 if (C->_type_verify == nullptr) {
976 C->_type_verify = new (C->comp_arena())VerifyMeetResult(C);
977 }
978 _C->_type_verify->_depth++;
979 }
980
981 ~VerifyMeet() {
982 assert(_C->_type_verify->_depth != 0, "");
983 _C->_type_verify->_depth--;
984 if (_C->_type_verify->_depth == 0) {
985 _C->_type_verify->_cache.trunc_to(0);
986 }
987 }
988
989 const Type* meet(const Type* t1, const Type* t2) const {
990 return _C->_type_verify->meet(t1, t2);
991 }
992
993 void add(const Type* t1, const Type* t2, const Type* res) const {
994 _C->_type_verify->add(t1, t2, res);
995 }
996 };
997
998 void Type::check_symmetrical(const Type* t, const Type* mt, const VerifyMeet& verify) const {
999 Compile* C = Compile::current();
1000 const Type* mt2 = verify.meet(t, this);
1001
1002 // Verify that:
1003 // this meet t == t meet this
1004 if (mt != mt2) {
1005 tty->print_cr("=== Meet Not Commutative ===");
1006 tty->print("t = "); t->dump(); tty->cr();
1007 tty->print("this = "); dump(); tty->cr();
1008 tty->print("t meet this = "); mt2->dump(); tty->cr();
1009 tty->print("this meet t = "); mt->dump(); tty->cr();
1010 fatal("meet not commutative");
1011 }
1012 const Type* dual_join = mt->_dual;
1013 const Type* t2t = verify.meet(dual_join,t->_dual);
1014 const Type* t2this = verify.meet(dual_join,this->_dual);
1015
1016 // Interface meet Oop is Not Symmetric:
1017 // Interface:AnyNull meet Oop:AnyNull == Interface:AnyNull
1018 // Interface:NotNull meet Oop:NotNull == java/lang/Object:NotNull
1019
1020 // Verify that:
1021 // !(t meet this) meet !t ==
1022 // (!t join !this) meet !t == !t
1023 // and
1024 // !(t meet this) meet !this ==
1025 // (!t join !this) meet !this == !this
1026 if (t2t != t->_dual || t2this != this->_dual) {
1027 tty->print_cr("=== Meet Not Symmetric ===");
1028 tty->print("t = "); t->dump(); tty->cr();
1029 tty->print("this= "); dump(); tty->cr();
1030 tty->print("mt=(t meet this)= "); mt->dump(); tty->cr();
1031
1032 tty->print("t_dual= "); t->_dual->dump(); tty->cr();
1033 tty->print("this_dual= "); _dual->dump(); tty->cr();
1034 tty->print("mt_dual= "); mt->_dual->dump(); tty->cr();
1035
1036 tty->print("mt_dual meet t_dual= "); t2t ->dump(); tty->cr();
1037 tty->print("mt_dual meet this_dual= "); t2this ->dump(); tty->cr();
1038
1039 fatal("meet not symmetric");
1040 }
1041 }
1042 #endif
1043
1044 //------------------------------meet-------------------------------------------
1045 // Compute the MEET of two types. NOT virtual. It enforces that meet is
1046 // commutative and the lattice is symmetric.
1047 const Type *Type::meet_helper(const Type *t, bool include_speculative) const {
1048 if (isa_narrowoop() && t->isa_narrowoop()) {
1049 const Type* result = make_ptr()->meet_helper(t->make_ptr(), include_speculative);
1050 return result->make_narrowoop();
1051 }
1052 if (isa_narrowklass() && t->isa_narrowklass()) {
1053 const Type* result = make_ptr()->meet_helper(t->make_ptr(), include_speculative);
1054 return result->make_narrowklass();
1055 }
1056
1057 #ifdef ASSERT
1058 Compile* C = Compile::current();
1059 VerifyMeet verify(C);
1060 #endif
1061
1062 const Type *this_t = maybe_remove_speculative(include_speculative);
1063 t = t->maybe_remove_speculative(include_speculative);
1064
1065 const Type *mt = this_t->xmeet(t);
1066 #ifdef ASSERT
1067 verify.add(this_t, t, mt);
1068 if (isa_narrowoop() || t->isa_narrowoop()) {
1069 return mt;
1070 }
1071 if (isa_narrowklass() || t->isa_narrowklass()) {
1072 return mt;
1073 }
1074 this_t->check_symmetrical(t, mt, verify);
1075 const Type *mt_dual = verify.meet(this_t->_dual, t->_dual);
1076 this_t->_dual->check_symmetrical(t->_dual, mt_dual, verify);
1077 #endif
1078 return mt;
1079 }
1080
1081 //------------------------------xmeet------------------------------------------
1082 // Compute the MEET of two types. It returns a new Type object.
1083 const Type *Type::xmeet( const Type *t ) const {
1084 // Perform a fast test for common case; meeting the same types together.
1085 if( this == t ) return this; // Meeting same type-rep?
1086
1087 // Meeting TOP with anything?
1088 if( _base == Top ) return t;
1089
1090 // Meeting BOTTOM with anything?
1091 if( _base == Bottom ) return BOTTOM;
1092
1093 // Current "this->_base" is one of: Bad, Multi, Control, Top,
1094 // Abio, Abstore, Floatxxx, Doublexxx, Bottom, lastype.
1095 switch (t->base()) { // Switch on original type
1096
1097 // Cut in half the number of cases I must handle. Only need cases for when
1098 // the given enum "t->type" is less than or equal to the local enum "type".
1099 case FloatCon:
1100 case DoubleCon:
1101 case Int:
1102 case Long:
1103 return t->xmeet(this);
1104
1105 case OopPtr:
1106 return t->xmeet(this);
1107
1108 case InstPtr:
1109 return t->xmeet(this);
1110
1111 case MetadataPtr:
1112 case KlassPtr:
1113 case InstKlassPtr:
1114 case AryKlassPtr:
1115 return t->xmeet(this);
1116
1117 case AryPtr:
1118 return t->xmeet(this);
1119
1120 case NarrowOop:
1121 return t->xmeet(this);
1122
1123 case NarrowKlass:
1124 return t->xmeet(this);
1125
1126 case Bad: // Type check
1127 default: // Bogus type not in lattice
1128 typerr(t);
1129 return Type::BOTTOM;
1130
1131 case Bottom: // Ye Olde Default
1132 return t;
1133
1134 case FloatTop:
1135 if( _base == FloatTop ) return this;
1136 case FloatBot: // Float
1137 if( _base == FloatBot || _base == FloatTop ) return FLOAT;
1138 if( _base == DoubleTop || _base == DoubleBot ) return Type::BOTTOM;
1139 typerr(t);
1140 return Type::BOTTOM;
1141
1142 case DoubleTop:
1143 if( _base == DoubleTop ) return this;
1144 case DoubleBot: // Double
1145 if( _base == DoubleBot || _base == DoubleTop ) return DOUBLE;
1146 if( _base == FloatTop || _base == FloatBot ) return Type::BOTTOM;
1147 typerr(t);
1148 return Type::BOTTOM;
1149
1150 // These next few cases must match exactly or it is a compile-time error.
1151 case Control: // Control of code
1152 case Abio: // State of world outside of program
1153 case Memory:
1154 if( _base == t->_base ) return this;
1155 typerr(t);
1156 return Type::BOTTOM;
1157
1158 case Top: // Top of the lattice
1159 return this;
1160 }
1161
1162 // The type is unchanged
1163 return this;
1164 }
1165
1166 //-----------------------------filter------------------------------------------
1167 const Type *Type::filter_helper(const Type *kills, bool include_speculative) const {
1168 const Type* ft = join_helper(kills, include_speculative);
1169 if (ft->empty())
1170 return Type::TOP; // Canonical empty value
1171 return ft;
1172 }
1173
1174 //------------------------------xdual------------------------------------------
1175 const Type *Type::xdual() const {
1176 // Note: the base() accessor asserts the sanity of _base.
1177 assert(_type_info[base()].dual_type != Bad, "implement with v-call");
1178 return new Type(_type_info[_base].dual_type);
1179 }
1180
1181 //------------------------------has_memory-------------------------------------
1182 bool Type::has_memory() const {
1183 Type::TYPES tx = base();
1184 if (tx == Memory) return true;
1185 if (tx == Tuple) {
1186 const TypeTuple *t = is_tuple();
1187 for (uint i=0; i < t->cnt(); i++) {
1188 tx = t->field_at(i)->base();
1189 if (tx == Memory) return true;
1190 }
1191 }
1192 return false;
1193 }
1194
1195 #ifndef PRODUCT
1196 //------------------------------dump2------------------------------------------
1197 void Type::dump2( Dict &d, uint depth, outputStream *st ) const {
1198 st->print("%s", _type_info[_base].msg);
1199 }
1200
1201 //------------------------------dump-------------------------------------------
1202 void Type::dump_on(outputStream *st) const {
1203 ResourceMark rm;
1204 Dict d(cmpkey,hashkey); // Stop recursive type dumping
1205 dump2(d,1, st);
1206 if (is_ptr_to_narrowoop()) {
1207 st->print(" [narrow]");
1208 } else if (is_ptr_to_narrowklass()) {
1209 st->print(" [narrowklass]");
1210 }
1211 }
1212
1213 //-----------------------------------------------------------------------------
1214 const char* Type::str(const Type* t) {
1215 stringStream ss;
1216 t->dump_on(&ss);
1217 return ss.as_string();
1218 }
1219 #endif
1220
1221 //------------------------------singleton--------------------------------------
1222 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
1223 // constants (Ldi nodes). Singletons are integer, float or double constants.
1224 bool Type::singleton(void) const {
1225 return _base == Top || _base == Half;
1226 }
1227
1228 //------------------------------empty------------------------------------------
1229 // TRUE if Type is a type with no values, FALSE otherwise.
1230 bool Type::empty(void) const {
1231 switch (_base) {
1232 case DoubleTop:
1233 case FloatTop:
1234 case Top:
1235 return true;
1236
1237 case Half:
1238 case Abio:
1239 case Return_Address:
1240 case Memory:
1241 case Bottom:
1242 case FloatBot:
1243 case DoubleBot:
1244 return false; // never a singleton, therefore never empty
1245
1246 default:
1247 ShouldNotReachHere();
1248 return false;
1249 }
1250 }
1251
1252 //------------------------------dump_stats-------------------------------------
1253 // Dump collected statistics to stderr
1254 #ifndef PRODUCT
1255 void Type::dump_stats() {
1256 tty->print("Types made: %d\n", type_dict()->Size());
1257 }
1258 #endif
1259
1260 //------------------------------category---------------------------------------
1261 #ifndef PRODUCT
1262 Type::Category Type::category() const {
1263 const TypeTuple* tuple;
1264 switch (base()) {
1265 case Type::Int:
1266 case Type::Long:
1267 case Type::Half:
1268 case Type::NarrowOop:
1269 case Type::NarrowKlass:
1270 case Type::Array:
1271 case Type::VectorA:
1272 case Type::VectorS:
1273 case Type::VectorD:
1274 case Type::VectorX:
1275 case Type::VectorY:
1276 case Type::VectorZ:
1277 case Type::VectorMask:
1278 case Type::AnyPtr:
1279 case Type::RawPtr:
1280 case Type::OopPtr:
1281 case Type::InstPtr:
1282 case Type::AryPtr:
1283 case Type::MetadataPtr:
1284 case Type::KlassPtr:
1285 case Type::InstKlassPtr:
1286 case Type::AryKlassPtr:
1287 case Type::Function:
1288 case Type::Return_Address:
1289 case Type::FloatTop:
1290 case Type::FloatCon:
1291 case Type::FloatBot:
1292 case Type::DoubleTop:
1293 case Type::DoubleCon:
1294 case Type::DoubleBot:
1295 return Category::Data;
1296 case Type::Memory:
1297 return Category::Memory;
1298 case Type::Control:
1299 return Category::Control;
1300 case Type::Top:
1301 case Type::Abio:
1302 case Type::Bottom:
1303 return Category::Other;
1304 case Type::Bad:
1305 case Type::lastype:
1306 return Category::Undef;
1307 case Type::Tuple:
1308 // Recursive case. Return CatMixed if the tuple contains types of
1309 // different categories (e.g. CallStaticJavaNode's type), or the specific
1310 // category if all types are of the same category (e.g. IfNode's type).
1311 tuple = is_tuple();
1312 if (tuple->cnt() == 0) {
1313 return Category::Undef;
1314 } else {
1315 Category first = tuple->field_at(0)->category();
1316 for (uint i = 1; i < tuple->cnt(); i++) {
1317 if (tuple->field_at(i)->category() != first) {
1318 return Category::Mixed;
1319 }
1320 }
1321 return first;
1322 }
1323 default:
1324 assert(false, "unmatched base type: all base types must be categorized");
1325 }
1326 return Category::Undef;
1327 }
1328
1329 bool Type::has_category(Type::Category cat) const {
1330 if (category() == cat) {
1331 return true;
1332 }
1333 if (category() == Category::Mixed) {
1334 const TypeTuple* tuple = is_tuple();
1335 for (uint i = 0; i < tuple->cnt(); i++) {
1336 if (tuple->field_at(i)->has_category(cat)) {
1337 return true;
1338 }
1339 }
1340 }
1341 return false;
1342 }
1343 #endif
1344
1345 //------------------------------typerr-----------------------------------------
1346 void Type::typerr( const Type *t ) const {
1347 #ifndef PRODUCT
1348 tty->print("\nError mixing types: ");
1349 dump();
1350 tty->print(" and ");
1351 t->dump();
1352 tty->print("\n");
1353 #endif
1354 ShouldNotReachHere();
1355 }
1356
1357
1358 //=============================================================================
1359 // Convenience common pre-built types.
1360 const TypeF *TypeF::MAX; // Floating point max
1361 const TypeF *TypeF::MIN; // Floating point min
1362 const TypeF *TypeF::ZERO; // Floating point zero
1363 const TypeF *TypeF::ONE; // Floating point one
1364 const TypeF *TypeF::POS_INF; // Floating point positive infinity
1365 const TypeF *TypeF::NEG_INF; // Floating point negative infinity
1366
1367 //------------------------------make-------------------------------------------
1368 // Create a float constant
1369 const TypeF *TypeF::make(float f) {
1370 return (TypeF*)(new TypeF(f))->hashcons();
1371 }
1372
1373 //------------------------------meet-------------------------------------------
1374 // Compute the MEET of two types. It returns a new Type object.
1375 const Type *TypeF::xmeet( const Type *t ) const {
1376 // Perform a fast test for common case; meeting the same types together.
1377 if( this == t ) return this; // Meeting same type-rep?
1378
1379 // Current "this->_base" is FloatCon
1380 switch (t->base()) { // Switch on original type
1381 case AnyPtr: // Mixing with oops happens when javac
1382 case RawPtr: // reuses local variables
1383 case OopPtr:
1384 case InstPtr:
1385 case AryPtr:
1386 case MetadataPtr:
1387 case KlassPtr:
1388 case InstKlassPtr:
1389 case AryKlassPtr:
1390 case NarrowOop:
1391 case NarrowKlass:
1392 case Int:
1393 case Long:
1394 case DoubleTop:
1395 case DoubleCon:
1396 case DoubleBot:
1397 case Bottom: // Ye Olde Default
1398 return Type::BOTTOM;
1399
1400 case FloatBot:
1401 return t;
1402
1403 default: // All else is a mistake
1404 typerr(t);
1405
1406 case FloatCon: // Float-constant vs Float-constant?
1407 if( jint_cast(_f) != jint_cast(t->getf()) ) // unequal constants?
1408 // must compare bitwise as positive zero, negative zero and NaN have
1409 // all the same representation in C++
1410 return FLOAT; // Return generic float
1411 // Equal constants
1412 case Top:
1413 case FloatTop:
1414 break; // Return the float constant
1415 }
1416 return this; // Return the float constant
1417 }
1418
1419 //------------------------------xdual------------------------------------------
1420 // Dual: symmetric
1421 const Type *TypeF::xdual() const {
1422 return this;
1423 }
1424
1425 //------------------------------eq---------------------------------------------
1426 // Structural equality check for Type representations
1427 bool TypeF::eq(const Type *t) const {
1428 // Bitwise comparison to distinguish between +/-0. These values must be treated
1429 // as different to be consistent with C1 and the interpreter.
1430 return (jint_cast(_f) == jint_cast(t->getf()));
1431 }
1432
1433 //------------------------------hash-------------------------------------------
1434 // Type-specific hashing function.
1435 uint TypeF::hash(void) const {
1436 return *(uint*)(&_f);
1437 }
1438
1439 //------------------------------is_finite--------------------------------------
1440 // Has a finite value
1441 bool TypeF::is_finite() const {
1442 return g_isfinite(getf()) != 0;
1443 }
1444
1445 //------------------------------is_nan-----------------------------------------
1446 // Is not a number (NaN)
1447 bool TypeF::is_nan() const {
1448 return g_isnan(getf()) != 0;
1449 }
1450
1451 //------------------------------dump2------------------------------------------
1452 // Dump float constant Type
1453 #ifndef PRODUCT
1454 void TypeF::dump2( Dict &d, uint depth, outputStream *st ) const {
1455 Type::dump2(d,depth, st);
1456 st->print("%f", _f);
1457 }
1458 #endif
1459
1460 //------------------------------singleton--------------------------------------
1461 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
1462 // constants (Ldi nodes). Singletons are integer, float or double constants
1463 // or a single symbol.
1464 bool TypeF::singleton(void) const {
1465 return true; // Always a singleton
1466 }
1467
1468 bool TypeF::empty(void) const {
1469 return false; // always exactly a singleton
1470 }
1471
1472 //=============================================================================
1473 // Convenience common pre-built types.
1474 const TypeD *TypeD::MAX; // Floating point max
1475 const TypeD *TypeD::MIN; // Floating point min
1476 const TypeD *TypeD::ZERO; // Floating point zero
1477 const TypeD *TypeD::ONE; // Floating point one
1478 const TypeD *TypeD::POS_INF; // Floating point positive infinity
1479 const TypeD *TypeD::NEG_INF; // Floating point negative infinity
1480
1481 //------------------------------make-------------------------------------------
1482 const TypeD *TypeD::make(double d) {
1483 return (TypeD*)(new TypeD(d))->hashcons();
1484 }
1485
1486 //------------------------------meet-------------------------------------------
1487 // Compute the MEET of two types. It returns a new Type object.
1488 const Type *TypeD::xmeet( const Type *t ) const {
1489 // Perform a fast test for common case; meeting the same types together.
1490 if( this == t ) return this; // Meeting same type-rep?
1491
1492 // Current "this->_base" is DoubleCon
1493 switch (t->base()) { // Switch on original type
1494 case AnyPtr: // Mixing with oops happens when javac
1495 case RawPtr: // reuses local variables
1496 case OopPtr:
1497 case InstPtr:
1498 case AryPtr:
1499 case MetadataPtr:
1500 case KlassPtr:
1501 case InstKlassPtr:
1502 case AryKlassPtr:
1503 case NarrowOop:
1504 case NarrowKlass:
1505 case Int:
1506 case Long:
1507 case FloatTop:
1508 case FloatCon:
1509 case FloatBot:
1510 case Bottom: // Ye Olde Default
1511 return Type::BOTTOM;
1512
1513 case DoubleBot:
1514 return t;
1515
1516 default: // All else is a mistake
1517 typerr(t);
1518
1519 case DoubleCon: // Double-constant vs Double-constant?
1520 if( jlong_cast(_d) != jlong_cast(t->getd()) ) // unequal constants? (see comment in TypeF::xmeet)
1521 return DOUBLE; // Return generic double
1522 case Top:
1523 case DoubleTop:
1524 break;
1525 }
1526 return this; // Return the double constant
1527 }
1528
1529 //------------------------------xdual------------------------------------------
1530 // Dual: symmetric
1531 const Type *TypeD::xdual() const {
1532 return this;
1533 }
1534
1535 //------------------------------eq---------------------------------------------
1536 // Structural equality check for Type representations
1537 bool TypeD::eq(const Type *t) const {
1538 // Bitwise comparison to distinguish between +/-0. These values must be treated
1539 // as different to be consistent with C1 and the interpreter.
1540 return (jlong_cast(_d) == jlong_cast(t->getd()));
1541 }
1542
1543 //------------------------------hash-------------------------------------------
1544 // Type-specific hashing function.
1545 uint TypeD::hash(void) const {
1546 return *(uint*)(&_d);
1547 }
1548
1549 //------------------------------is_finite--------------------------------------
1550 // Has a finite value
1551 bool TypeD::is_finite() const {
1552 return g_isfinite(getd()) != 0;
1553 }
1554
1555 //------------------------------is_nan-----------------------------------------
1556 // Is not a number (NaN)
1557 bool TypeD::is_nan() const {
1558 return g_isnan(getd()) != 0;
1559 }
1560
1561 //------------------------------dump2------------------------------------------
1562 // Dump double constant Type
1563 #ifndef PRODUCT
1564 void TypeD::dump2( Dict &d, uint depth, outputStream *st ) const {
1565 Type::dump2(d,depth,st);
1566 st->print("%f", _d);
1567 }
1568 #endif
1569
1570 //------------------------------singleton--------------------------------------
1571 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
1572 // constants (Ldi nodes). Singletons are integer, float or double constants
1573 // or a single symbol.
1574 bool TypeD::singleton(void) const {
1575 return true; // Always a singleton
1576 }
1577
1578 bool TypeD::empty(void) const {
1579 return false; // always exactly a singleton
1580 }
1581
1582 const TypeInteger* TypeInteger::make(jlong lo, jlong hi, int w, BasicType bt) {
1583 if (bt == T_INT) {
1584 return TypeInt::make(checked_cast<jint>(lo), checked_cast<jint>(hi), w);
1585 }
1586 assert(bt == T_LONG, "basic type not an int or long");
1587 return TypeLong::make(lo, hi, w);
1588 }
1589
1590 jlong TypeInteger::get_con_as_long(BasicType bt) const {
1591 if (bt == T_INT) {
1592 return is_int()->get_con();
1593 }
1594 assert(bt == T_LONG, "basic type not an int or long");
1595 return is_long()->get_con();
1596 }
1597
1598 const TypeInteger* TypeInteger::bottom(BasicType bt) {
1599 if (bt == T_INT) {
1600 return TypeInt::INT;
1601 }
1602 assert(bt == T_LONG, "basic type not an int or long");
1603 return TypeLong::LONG;
1604 }
1605
1606 const TypeInteger* TypeInteger::zero(BasicType bt) {
1607 if (bt == T_INT) {
1608 return TypeInt::ZERO;
1609 }
1610 assert(bt == T_LONG, "basic type not an int or long");
1611 return TypeLong::ZERO;
1612 }
1613
1614 const TypeInteger* TypeInteger::one(BasicType bt) {
1615 if (bt == T_INT) {
1616 return TypeInt::ONE;
1617 }
1618 assert(bt == T_LONG, "basic type not an int or long");
1619 return TypeLong::ONE;
1620 }
1621
1622 const TypeInteger* TypeInteger::minus_1(BasicType bt) {
1623 if (bt == T_INT) {
1624 return TypeInt::MINUS_1;
1625 }
1626 assert(bt == T_LONG, "basic type not an int or long");
1627 return TypeLong::MINUS_1;
1628 }
1629
1630 //=============================================================================
1631 // Convenience common pre-built types.
1632 const TypeInt *TypeInt::MAX; // INT_MAX
1633 const TypeInt *TypeInt::MIN; // INT_MIN
1634 const TypeInt *TypeInt::MINUS_1;// -1
1635 const TypeInt *TypeInt::ZERO; // 0
1636 const TypeInt *TypeInt::ONE; // 1
1637 const TypeInt *TypeInt::BOOL; // 0 or 1, FALSE or TRUE.
1638 const TypeInt *TypeInt::CC; // -1,0 or 1, condition codes
1639 const TypeInt *TypeInt::CC_LT; // [-1] == MINUS_1
1640 const TypeInt *TypeInt::CC_GT; // [1] == ONE
1641 const TypeInt *TypeInt::CC_EQ; // [0] == ZERO
1642 const TypeInt *TypeInt::CC_LE; // [-1,0]
1643 const TypeInt *TypeInt::CC_GE; // [0,1] == BOOL (!)
1644 const TypeInt *TypeInt::BYTE; // Bytes, -128 to 127
1645 const TypeInt *TypeInt::UBYTE; // Unsigned Bytes, 0 to 255
1646 const TypeInt *TypeInt::CHAR; // Java chars, 0-65535
1647 const TypeInt *TypeInt::SHORT; // Java shorts, -32768-32767
1648 const TypeInt *TypeInt::POS; // Positive 32-bit integers or zero
1649 const TypeInt *TypeInt::POS1; // Positive 32-bit integers
1650 const TypeInt *TypeInt::INT; // 32-bit integers
1651 const TypeInt *TypeInt::SYMINT; // symmetric range [-max_jint..max_jint]
1652 const TypeInt *TypeInt::TYPE_DOMAIN; // alias for TypeInt::INT
1653
1654 //------------------------------TypeInt----------------------------------------
1655 TypeInt::TypeInt( jint lo, jint hi, int w ) : TypeInteger(Int, w), _lo(lo), _hi(hi) {
1656 }
1657
1658 //------------------------------make-------------------------------------------
1659 const TypeInt *TypeInt::make( jint lo ) {
1660 return (TypeInt*)(new TypeInt(lo,lo,WidenMin))->hashcons();
1661 }
1662
1663 static int normalize_int_widen( jint lo, jint hi, int w ) {
1664 // Certain normalizations keep us sane when comparing types.
1665 // The 'SMALLINT' covers constants and also CC and its relatives.
1666 if (lo <= hi) {
1667 if (((juint)hi - lo) <= SMALLINT) w = Type::WidenMin;
1668 if (((juint)hi - lo) >= max_juint) w = Type::WidenMax; // TypeInt::INT
1669 } else {
1670 if (((juint)lo - hi) <= SMALLINT) w = Type::WidenMin;
1671 if (((juint)lo - hi) >= max_juint) w = Type::WidenMin; // dual TypeInt::INT
1672 }
1673 return w;
1674 }
1675
1676 const TypeInt *TypeInt::make( jint lo, jint hi, int w ) {
1677 w = normalize_int_widen(lo, hi, w);
1678 return (TypeInt*)(new TypeInt(lo,hi,w))->hashcons();
1679 }
1680
1681 //------------------------------meet-------------------------------------------
1682 // Compute the MEET of two types. It returns a new Type representation object
1683 // with reference count equal to the number of Types pointing at it.
1684 // Caller should wrap a Types around it.
1685 const Type *TypeInt::xmeet( const Type *t ) const {
1686 // Perform a fast test for common case; meeting the same types together.
1687 if( this == t ) return this; // Meeting same type?
1688
1689 // Currently "this->_base" is a TypeInt
1690 switch (t->base()) { // Switch on original type
1691 case AnyPtr: // Mixing with oops happens when javac
1692 case RawPtr: // reuses local variables
1693 case OopPtr:
1694 case InstPtr:
1695 case AryPtr:
1696 case MetadataPtr:
1697 case KlassPtr:
1698 case InstKlassPtr:
1699 case AryKlassPtr:
1700 case NarrowOop:
1701 case NarrowKlass:
1702 case Long:
1703 case FloatTop:
1704 case FloatCon:
1705 case FloatBot:
1706 case DoubleTop:
1707 case DoubleCon:
1708 case DoubleBot:
1709 case Bottom: // Ye Olde Default
1710 return Type::BOTTOM;
1711 default: // All else is a mistake
1712 typerr(t);
1713 case Top: // No change
1714 return this;
1715 case Int: // Int vs Int?
1716 break;
1717 }
1718
1719 // Expand covered set
1720 const TypeInt *r = t->is_int();
1721 return make( MIN2(_lo,r->_lo), MAX2(_hi,r->_hi), MAX2(_widen,r->_widen) );
1722 }
1723
1724 //------------------------------xdual------------------------------------------
1725 // Dual: reverse hi & lo; flip widen
1726 const Type *TypeInt::xdual() const {
1727 int w = normalize_int_widen(_hi,_lo, WidenMax-_widen);
1728 return new TypeInt(_hi,_lo,w);
1729 }
1730
1731 //------------------------------widen------------------------------------------
1732 // Only happens for optimistic top-down optimizations.
1733 const Type *TypeInt::widen( const Type *old, const Type* limit ) const {
1734 // Coming from TOP or such; no widening
1735 if( old->base() != Int ) return this;
1736 const TypeInt *ot = old->is_int();
1737
1738 // If new guy is equal to old guy, no widening
1739 if( _lo == ot->_lo && _hi == ot->_hi )
1740 return old;
1741
1742 // If new guy contains old, then we widened
1743 if( _lo <= ot->_lo && _hi >= ot->_hi ) {
1744 // New contains old
1745 // If new guy is already wider than old, no widening
1746 if( _widen > ot->_widen ) return this;
1747 // If old guy was a constant, do not bother
1748 if (ot->_lo == ot->_hi) return this;
1749 // Now widen new guy.
1750 // Check for widening too far
1751 if (_widen == WidenMax) {
1752 int max = max_jint;
1753 int min = min_jint;
1754 if (limit->isa_int()) {
1755 max = limit->is_int()->_hi;
1756 min = limit->is_int()->_lo;
1757 }
1758 if (min < _lo && _hi < max) {
1759 // If neither endpoint is extremal yet, push out the endpoint
1760 // which is closer to its respective limit.
1761 if (_lo >= 0 || // easy common case
1762 ((juint)_lo - min) >= ((juint)max - _hi)) {
1763 // Try to widen to an unsigned range type of 31 bits:
1764 return make(_lo, max, WidenMax);
1765 } else {
1766 return make(min, _hi, WidenMax);
1767 }
1768 }
1769 return TypeInt::INT;
1770 }
1771 // Returned widened new guy
1772 return make(_lo,_hi,_widen+1);
1773 }
1774
1775 // If old guy contains new, then we probably widened too far & dropped to
1776 // bottom. Return the wider fellow.
1777 if ( ot->_lo <= _lo && ot->_hi >= _hi )
1778 return old;
1779
1780 //fatal("Integer value range is not subset");
1781 //return this;
1782 return TypeInt::INT;
1783 }
1784
1785 //------------------------------narrow---------------------------------------
1786 // Only happens for pessimistic optimizations.
1787 const Type *TypeInt::narrow( const Type *old ) const {
1788 if (_lo >= _hi) return this; // already narrow enough
1789 if (old == nullptr) return this;
1790 const TypeInt* ot = old->isa_int();
1791 if (ot == nullptr) return this;
1792 jint olo = ot->_lo;
1793 jint ohi = ot->_hi;
1794
1795 // If new guy is equal to old guy, no narrowing
1796 if (_lo == olo && _hi == ohi) return old;
1797
1798 // If old guy was maximum range, allow the narrowing
1799 if (olo == min_jint && ohi == max_jint) return this;
1800
1801 if (_lo < olo || _hi > ohi)
1802 return this; // doesn't narrow; pretty weird
1803
1804 // The new type narrows the old type, so look for a "death march".
1805 // See comments on PhaseTransform::saturate.
1806 juint nrange = (juint)_hi - _lo;
1807 juint orange = (juint)ohi - olo;
1808 if (nrange < max_juint - 1 && nrange > (orange >> 1) + (SMALLINT*2)) {
1809 // Use the new type only if the range shrinks a lot.
1810 // We do not want the optimizer computing 2^31 point by point.
1811 return old;
1812 }
1813
1814 return this;
1815 }
1816
1817 //-----------------------------filter------------------------------------------
1818 const Type *TypeInt::filter_helper(const Type *kills, bool include_speculative) const {
1819 const TypeInt* ft = join_helper(kills, include_speculative)->isa_int();
1820 if (ft == nullptr || ft->empty())
1821 return Type::TOP; // Canonical empty value
1822 if (ft->_widen < this->_widen) {
1823 // Do not allow the value of kill->_widen to affect the outcome.
1824 // The widen bits must be allowed to run freely through the graph.
1825 ft = TypeInt::make(ft->_lo, ft->_hi, this->_widen);
1826 }
1827 return ft;
1828 }
1829
1830 //------------------------------eq---------------------------------------------
1831 // Structural equality check for Type representations
1832 bool TypeInt::eq( const Type *t ) const {
1833 const TypeInt *r = t->is_int(); // Handy access
1834 return r->_lo == _lo && r->_hi == _hi && r->_widen == _widen;
1835 }
1836
1837 //------------------------------hash-------------------------------------------
1838 // Type-specific hashing function.
1839 uint TypeInt::hash(void) const {
1840 return (uint)_lo + (uint)_hi + (uint)_widen + (uint)Type::Int;
1841 }
1842
1843 //------------------------------is_finite--------------------------------------
1844 // Has a finite value
1845 bool TypeInt::is_finite() const {
1846 return true;
1847 }
1848
1849 //------------------------------dump2------------------------------------------
1850 // Dump TypeInt
1851 #ifndef PRODUCT
1852 static const char* intname(char* buf, size_t buf_size, jint n) {
1853 if (n == min_jint)
1854 return "min";
1855 else if (n < min_jint + 10000)
1856 os::snprintf_checked(buf, buf_size, "min+" INT32_FORMAT, n - min_jint);
1857 else if (n == max_jint)
1858 return "max";
1859 else if (n > max_jint - 10000)
1860 os::snprintf_checked(buf, buf_size, "max-" INT32_FORMAT, max_jint - n);
1861 else
1862 os::snprintf_checked(buf, buf_size, INT32_FORMAT, n);
1863 return buf;
1864 }
1865
1866 void TypeInt::dump2( Dict &d, uint depth, outputStream *st ) const {
1867 char buf[40], buf2[40];
1868 if (_lo == min_jint && _hi == max_jint)
1869 st->print("int");
1870 else if (is_con())
1871 st->print("int:%s", intname(buf, sizeof(buf), get_con()));
1872 else if (_lo == BOOL->_lo && _hi == BOOL->_hi)
1873 st->print("bool");
1874 else if (_lo == BYTE->_lo && _hi == BYTE->_hi)
1875 st->print("byte");
1876 else if (_lo == CHAR->_lo && _hi == CHAR->_hi)
1877 st->print("char");
1878 else if (_lo == SHORT->_lo && _hi == SHORT->_hi)
1879 st->print("short");
1880 else if (_hi == max_jint)
1881 st->print("int:>=%s", intname(buf, sizeof(buf), _lo));
1882 else if (_lo == min_jint)
1883 st->print("int:<=%s", intname(buf, sizeof(buf), _hi));
1884 else
1885 st->print("int:%s..%s", intname(buf, sizeof(buf), _lo), intname(buf2, sizeof(buf2), _hi));
1886
1887 if (_widen != 0 && this != TypeInt::INT)
1888 st->print(":%.*s", _widen, "wwww");
1889 }
1890 #endif
1891
1892 //------------------------------singleton--------------------------------------
1893 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
1894 // constants.
1895 bool TypeInt::singleton(void) const {
1896 return _lo >= _hi;
1897 }
1898
1899 bool TypeInt::empty(void) const {
1900 return _lo > _hi;
1901 }
1902
1903 //=============================================================================
1904 // Convenience common pre-built types.
1905 const TypeLong *TypeLong::MAX;
1906 const TypeLong *TypeLong::MIN;
1907 const TypeLong *TypeLong::MINUS_1;// -1
1908 const TypeLong *TypeLong::ZERO; // 0
1909 const TypeLong *TypeLong::ONE; // 1
1910 const TypeLong *TypeLong::POS; // >=0
1911 const TypeLong *TypeLong::LONG; // 64-bit integers
1912 const TypeLong *TypeLong::INT; // 32-bit subrange
1913 const TypeLong *TypeLong::UINT; // 32-bit unsigned subrange
1914 const TypeLong *TypeLong::TYPE_DOMAIN; // alias for TypeLong::LONG
1915
1916 //------------------------------TypeLong---------------------------------------
1917 TypeLong::TypeLong(jlong lo, jlong hi, int w) : TypeInteger(Long, w), _lo(lo), _hi(hi) {
1918 }
1919
1920 //------------------------------make-------------------------------------------
1921 const TypeLong *TypeLong::make( jlong lo ) {
1922 return (TypeLong*)(new TypeLong(lo,lo,WidenMin))->hashcons();
1923 }
1924
1925 static int normalize_long_widen( jlong lo, jlong hi, int w ) {
1926 // Certain normalizations keep us sane when comparing types.
1927 // The 'SMALLINT' covers constants.
1928 if (lo <= hi) {
1929 if (((julong)hi - lo) <= SMALLINT) w = Type::WidenMin;
1930 if (((julong)hi - lo) >= max_julong) w = Type::WidenMax; // TypeLong::LONG
1931 } else {
1932 if (((julong)lo - hi) <= SMALLINT) w = Type::WidenMin;
1933 if (((julong)lo - hi) >= max_julong) w = Type::WidenMin; // dual TypeLong::LONG
1934 }
1935 return w;
1936 }
1937
1938 const TypeLong *TypeLong::make( jlong lo, jlong hi, int w ) {
1939 w = normalize_long_widen(lo, hi, w);
1940 return (TypeLong*)(new TypeLong(lo,hi,w))->hashcons();
1941 }
1942
1943
1944 //------------------------------meet-------------------------------------------
1945 // Compute the MEET of two types. It returns a new Type representation object
1946 // with reference count equal to the number of Types pointing at it.
1947 // Caller should wrap a Types around it.
1948 const Type *TypeLong::xmeet( const Type *t ) const {
1949 // Perform a fast test for common case; meeting the same types together.
1950 if( this == t ) return this; // Meeting same type?
1951
1952 // Currently "this->_base" is a TypeLong
1953 switch (t->base()) { // Switch on original type
1954 case AnyPtr: // Mixing with oops happens when javac
1955 case RawPtr: // reuses local variables
1956 case OopPtr:
1957 case InstPtr:
1958 case AryPtr:
1959 case MetadataPtr:
1960 case KlassPtr:
1961 case InstKlassPtr:
1962 case AryKlassPtr:
1963 case NarrowOop:
1964 case NarrowKlass:
1965 case Int:
1966 case FloatTop:
1967 case FloatCon:
1968 case FloatBot:
1969 case DoubleTop:
1970 case DoubleCon:
1971 case DoubleBot:
1972 case Bottom: // Ye Olde Default
1973 return Type::BOTTOM;
1974 default: // All else is a mistake
1975 typerr(t);
1976 case Top: // No change
1977 return this;
1978 case Long: // Long vs Long?
1979 break;
1980 }
1981
1982 // Expand covered set
1983 const TypeLong *r = t->is_long(); // Turn into a TypeLong
1984 return make( MIN2(_lo,r->_lo), MAX2(_hi,r->_hi), MAX2(_widen,r->_widen) );
1985 }
1986
1987 //------------------------------xdual------------------------------------------
1988 // Dual: reverse hi & lo; flip widen
1989 const Type *TypeLong::xdual() const {
1990 int w = normalize_long_widen(_hi,_lo, WidenMax-_widen);
1991 return new TypeLong(_hi,_lo,w);
1992 }
1993
1994 //------------------------------widen------------------------------------------
1995 // Only happens for optimistic top-down optimizations.
1996 const Type *TypeLong::widen( const Type *old, const Type* limit ) const {
1997 // Coming from TOP or such; no widening
1998 if( old->base() != Long ) return this;
1999 const TypeLong *ot = old->is_long();
2000
2001 // If new guy is equal to old guy, no widening
2002 if( _lo == ot->_lo && _hi == ot->_hi )
2003 return old;
2004
2005 // If new guy contains old, then we widened
2006 if( _lo <= ot->_lo && _hi >= ot->_hi ) {
2007 // New contains old
2008 // If new guy is already wider than old, no widening
2009 if( _widen > ot->_widen ) return this;
2010 // If old guy was a constant, do not bother
2011 if (ot->_lo == ot->_hi) return this;
2012 // Now widen new guy.
2013 // Check for widening too far
2014 if (_widen == WidenMax) {
2015 jlong max = max_jlong;
2016 jlong min = min_jlong;
2017 if (limit->isa_long()) {
2018 max = limit->is_long()->_hi;
2019 min = limit->is_long()->_lo;
2020 }
2021 if (min < _lo && _hi < max) {
2022 // If neither endpoint is extremal yet, push out the endpoint
2023 // which is closer to its respective limit.
2024 if (_lo >= 0 || // easy common case
2025 ((julong)_lo - min) >= ((julong)max - _hi)) {
2026 // Try to widen to an unsigned range type of 32/63 bits:
2027 if (max >= max_juint && _hi < max_juint)
2028 return make(_lo, max_juint, WidenMax);
2029 else
2030 return make(_lo, max, WidenMax);
2031 } else {
2032 return make(min, _hi, WidenMax);
2033 }
2034 }
2035 return TypeLong::LONG;
2036 }
2037 // Returned widened new guy
2038 return make(_lo,_hi,_widen+1);
2039 }
2040
2041 // If old guy contains new, then we probably widened too far & dropped to
2042 // bottom. Return the wider fellow.
2043 if ( ot->_lo <= _lo && ot->_hi >= _hi )
2044 return old;
2045
2046 // fatal("Long value range is not subset");
2047 // return this;
2048 return TypeLong::LONG;
2049 }
2050
2051 //------------------------------narrow----------------------------------------
2052 // Only happens for pessimistic optimizations.
2053 const Type *TypeLong::narrow( const Type *old ) const {
2054 if (_lo >= _hi) return this; // already narrow enough
2055 if (old == nullptr) return this;
2056 const TypeLong* ot = old->isa_long();
2057 if (ot == nullptr) return this;
2058 jlong olo = ot->_lo;
2059 jlong ohi = ot->_hi;
2060
2061 // If new guy is equal to old guy, no narrowing
2062 if (_lo == olo && _hi == ohi) return old;
2063
2064 // If old guy was maximum range, allow the narrowing
2065 if (olo == min_jlong && ohi == max_jlong) return this;
2066
2067 if (_lo < olo || _hi > ohi)
2068 return this; // doesn't narrow; pretty weird
2069
2070 // The new type narrows the old type, so look for a "death march".
2071 // See comments on PhaseTransform::saturate.
2072 julong nrange = (julong)_hi - _lo;
2073 julong orange = (julong)ohi - olo;
2074 if (nrange < max_julong - 1 && nrange > (orange >> 1) + (SMALLINT*2)) {
2075 // Use the new type only if the range shrinks a lot.
2076 // We do not want the optimizer computing 2^31 point by point.
2077 return old;
2078 }
2079
2080 return this;
2081 }
2082
2083 //-----------------------------filter------------------------------------------
2084 const Type *TypeLong::filter_helper(const Type *kills, bool include_speculative) const {
2085 const TypeLong* ft = join_helper(kills, include_speculative)->isa_long();
2086 if (ft == nullptr || ft->empty())
2087 return Type::TOP; // Canonical empty value
2088 if (ft->_widen < this->_widen) {
2089 // Do not allow the value of kill->_widen to affect the outcome.
2090 // The widen bits must be allowed to run freely through the graph.
2091 ft = TypeLong::make(ft->_lo, ft->_hi, this->_widen);
2092 }
2093 return ft;
2094 }
2095
2096 //------------------------------eq---------------------------------------------
2097 // Structural equality check for Type representations
2098 bool TypeLong::eq( const Type *t ) const {
2099 const TypeLong *r = t->is_long(); // Handy access
2100 return r->_lo == _lo && r->_hi == _hi && r->_widen == _widen;
2101 }
2102
2103 //------------------------------hash-------------------------------------------
2104 // Type-specific hashing function.
2105 uint TypeLong::hash(void) const {
2106 return (uint)_lo + (uint)_hi + (uint)_widen + (uint)Type::Long;
2107 }
2108
2109 //------------------------------is_finite--------------------------------------
2110 // Has a finite value
2111 bool TypeLong::is_finite() const {
2112 return true;
2113 }
2114
2115 //------------------------------dump2------------------------------------------
2116 // Dump TypeLong
2117 #ifndef PRODUCT
2118 static const char* longnamenear(jlong x, const char* xname, char* buf, size_t buf_size, jlong n) {
2119 if (n > x) {
2120 if (n >= x + 10000) return nullptr;
2121 os::snprintf_checked(buf, buf_size, "%s+" JLONG_FORMAT, xname, n - x);
2122 } else if (n < x) {
2123 if (n <= x - 10000) return nullptr;
2124 os::snprintf_checked(buf, buf_size, "%s-" JLONG_FORMAT, xname, x - n);
2125 } else {
2126 return xname;
2127 }
2128 return buf;
2129 }
2130
2131 static const char* longname(char* buf, size_t buf_size, jlong n) {
2132 const char* str;
2133 if (n == min_jlong)
2134 return "min";
2135 else if (n < min_jlong + 10000)
2136 os::snprintf_checked(buf, buf_size, "min+" JLONG_FORMAT, n - min_jlong);
2137 else if (n == max_jlong)
2138 return "max";
2139 else if (n > max_jlong - 10000)
2140 os::snprintf_checked(buf, buf_size, "max-" JLONG_FORMAT, max_jlong - n);
2141 else if ((str = longnamenear(max_juint, "maxuint", buf, buf_size, n)) != nullptr)
2142 return str;
2143 else if ((str = longnamenear(max_jint, "maxint", buf, buf_size, n)) != nullptr)
2144 return str;
2145 else if ((str = longnamenear(min_jint, "minint", buf, buf_size, n)) != nullptr)
2146 return str;
2147 else
2148 os::snprintf_checked(buf, buf_size, JLONG_FORMAT, n);
2149 return buf;
2150 }
2151
2152 void TypeLong::dump2( Dict &d, uint depth, outputStream *st ) const {
2153 char buf[80], buf2[80];
2154 if (_lo == min_jlong && _hi == max_jlong)
2155 st->print("long");
2156 else if (is_con())
2157 st->print("long:%s", longname(buf, sizeof(buf), get_con()));
2158 else if (_hi == max_jlong)
2159 st->print("long:>=%s", longname(buf, sizeof(buf), _lo));
2160 else if (_lo == min_jlong)
2161 st->print("long:<=%s", longname(buf, sizeof(buf), _hi));
2162 else
2163 st->print("long:%s..%s", longname(buf, sizeof(buf), _lo), longname(buf2,sizeof(buf2), _hi));
2164
2165 if (_widen != 0 && this != TypeLong::LONG)
2166 st->print(":%.*s", _widen, "wwww");
2167 }
2168 #endif
2169
2170 //------------------------------singleton--------------------------------------
2171 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
2172 // constants
2173 bool TypeLong::singleton(void) const {
2174 return _lo >= _hi;
2175 }
2176
2177 bool TypeLong::empty(void) const {
2178 return _lo > _hi;
2179 }
2180
2181 //=============================================================================
2182 // Convenience common pre-built types.
2183 const TypeTuple *TypeTuple::IFBOTH; // Return both arms of IF as reachable
2184 const TypeTuple *TypeTuple::IFFALSE;
2185 const TypeTuple *TypeTuple::IFTRUE;
2186 const TypeTuple *TypeTuple::IFNEITHER;
2187 const TypeTuple *TypeTuple::LOOPBODY;
2188 const TypeTuple *TypeTuple::MEMBAR;
2189 const TypeTuple *TypeTuple::STORECONDITIONAL;
2190 const TypeTuple *TypeTuple::START_I2C;
2191 const TypeTuple *TypeTuple::INT_PAIR;
2192 const TypeTuple *TypeTuple::LONG_PAIR;
2193 const TypeTuple *TypeTuple::INT_CC_PAIR;
2194 const TypeTuple *TypeTuple::LONG_CC_PAIR;
2195
2196 static void collect_inline_fields(ciInlineKlass* vk, const Type** field_array, uint& pos) {
2197 for (int j = 0; j < vk->nof_nonstatic_fields(); j++) {
2198 ciField* field = vk->nonstatic_field_at(j);
2199 BasicType bt = field->type()->basic_type();
2200 const Type* ft = Type::get_const_type(field->type());
2201 field_array[pos++] = ft;
2202 if (type2size[bt] == 2) {
2203 field_array[pos++] = Type::HALF;
2204 }
2205 }
2206 }
2207
2208 //------------------------------make-------------------------------------------
2209 // Make a TypeTuple from the range of a method signature
2210 const TypeTuple *TypeTuple::make_range(ciSignature* sig, InterfaceHandling interface_handling, bool ret_vt_fields) {
2211 ciType* return_type = sig->return_type();
2212 uint arg_cnt = return_type->size();
2213 if (ret_vt_fields) {
2214 arg_cnt = return_type->as_inline_klass()->inline_arg_slots() + 1;
2215 // InlineTypeNode::IsInit field used for null checking
2216 arg_cnt++;
2217 }
2218 const Type **field_array = fields(arg_cnt);
2219 switch (return_type->basic_type()) {
2220 case T_LONG:
2221 field_array[TypeFunc::Parms] = TypeLong::LONG;
2222 field_array[TypeFunc::Parms+1] = Type::HALF;
2223 break;
2224 case T_DOUBLE:
2225 field_array[TypeFunc::Parms] = Type::DOUBLE;
2226 field_array[TypeFunc::Parms+1] = Type::HALF;
2227 break;
2228 case T_OBJECT:
2229 if (return_type->is_inlinetype() && ret_vt_fields) {
2230 uint pos = TypeFunc::Parms;
2231 field_array[pos++] = get_const_type(return_type); // Oop might be null when returning as fields
2232 collect_inline_fields(return_type->as_inline_klass(), field_array, pos);
2233 // InlineTypeNode::IsInit field used for null checking
2234 field_array[pos++] = get_const_basic_type(T_BOOLEAN);
2235 break;
2236 } else {
2237 field_array[TypeFunc::Parms] = get_const_type(return_type, interface_handling)->join_speculative(TypePtr::BOTTOM);
2238 }
2239 break;
2240 case T_ARRAY:
2241 case T_BOOLEAN:
2242 case T_CHAR:
2243 case T_FLOAT:
2244 case T_BYTE:
2245 case T_SHORT:
2246 case T_INT:
2247 field_array[TypeFunc::Parms] = get_const_type(return_type, interface_handling);
2248 break;
2249 case T_VOID:
2250 break;
2251 default:
2252 ShouldNotReachHere();
2253 }
2254 return (TypeTuple*)(new TypeTuple(TypeFunc::Parms + arg_cnt, field_array))->hashcons();
2255 }
2256
2257 // Make a TypeTuple from the domain of a method signature
2258 const TypeTuple *TypeTuple::make_domain(ciMethod* method, InterfaceHandling interface_handling, bool vt_fields_as_args) {
2259 ciSignature* sig = method->signature();
2260 uint arg_cnt = sig->size() + (method->is_static() ? 0 : 1);
2261 if (vt_fields_as_args) {
2262 arg_cnt = 0;
2263 assert(method->get_sig_cc() != nullptr, "Should have scalarized signature");
2264 for (ExtendedSignature sig_cc = ExtendedSignature(method->get_sig_cc(), SigEntryFilter()); !sig_cc.at_end(); ++sig_cc) {
2265 arg_cnt += type2size[(*sig_cc)._bt];
2266 }
2267 }
2268
2269 uint pos = TypeFunc::Parms;
2270 const Type** field_array = fields(arg_cnt);
2271 if (!method->is_static()) {
2272 ciInstanceKlass* recv = method->holder();
2273 if (vt_fields_as_args && recv->is_inlinetype() && recv->as_inline_klass()->can_be_passed_as_fields() && method->is_scalarized_arg(0)) {
2274 collect_inline_fields(recv->as_inline_klass(), field_array, pos);
2275 } else {
2276 field_array[pos++] = get_const_type(recv, interface_handling)->join_speculative(TypePtr::NOTNULL);
2277 }
2278 }
2279
2280 int i = 0;
2281 while (pos < TypeFunc::Parms + arg_cnt) {
2282 ciType* type = sig->type_at(i);
2283 BasicType bt = type->basic_type();
2284
2285 switch (bt) {
2286 case T_LONG:
2287 field_array[pos++] = TypeLong::LONG;
2288 field_array[pos++] = Type::HALF;
2289 break;
2290 case T_DOUBLE:
2291 field_array[pos++] = Type::DOUBLE;
2292 field_array[pos++] = Type::HALF;
2293 break;
2294 case T_OBJECT:
2295 if (type->is_inlinetype() && vt_fields_as_args && method->is_scalarized_arg(i + (method->is_static() ? 0 : 1))) {
2296 // InlineTypeNode::IsInit field used for null checking
2297 field_array[pos++] = get_const_basic_type(T_BOOLEAN);
2298 collect_inline_fields(type->as_inline_klass(), field_array, pos);
2299 } else {
2300 field_array[pos++] = get_const_type(type, interface_handling);
2301 }
2302 break;
2303 case T_ARRAY:
2304 case T_FLOAT:
2305 case T_INT:
2306 field_array[pos++] = get_const_type(type, interface_handling);
2307 break;
2308 case T_BOOLEAN:
2309 case T_CHAR:
2310 case T_BYTE:
2311 case T_SHORT:
2312 field_array[pos++] = TypeInt::INT;
2313 break;
2314 default:
2315 ShouldNotReachHere();
2316 }
2317 i++;
2318 }
2319 assert(pos == TypeFunc::Parms + arg_cnt, "wrong number of arguments");
2320
2321 return (TypeTuple*)(new TypeTuple(TypeFunc::Parms + arg_cnt, field_array))->hashcons();
2322 }
2323
2324 const TypeTuple *TypeTuple::make( uint cnt, const Type **fields ) {
2325 return (TypeTuple*)(new TypeTuple(cnt,fields))->hashcons();
2326 }
2327
2328 //------------------------------fields-----------------------------------------
2329 // Subroutine call type with space allocated for argument types
2330 // Memory for Control, I_O, Memory, FramePtr, and ReturnAdr is allocated implicitly
2331 const Type **TypeTuple::fields( uint arg_cnt ) {
2332 const Type **flds = (const Type **)(Compile::current()->type_arena()->AmallocWords((TypeFunc::Parms+arg_cnt)*sizeof(Type*) ));
2333 flds[TypeFunc::Control ] = Type::CONTROL;
2334 flds[TypeFunc::I_O ] = Type::ABIO;
2335 flds[TypeFunc::Memory ] = Type::MEMORY;
2336 flds[TypeFunc::FramePtr ] = TypeRawPtr::BOTTOM;
2337 flds[TypeFunc::ReturnAdr] = Type::RETURN_ADDRESS;
2338
2339 return flds;
2340 }
2341
2342 //------------------------------meet-------------------------------------------
2343 // Compute the MEET of two types. It returns a new Type object.
2344 const Type *TypeTuple::xmeet( const Type *t ) const {
2345 // Perform a fast test for common case; meeting the same types together.
2346 if( this == t ) return this; // Meeting same type-rep?
2347
2348 // Current "this->_base" is Tuple
2349 switch (t->base()) { // switch on original type
2350
2351 case Bottom: // Ye Olde Default
2352 return t;
2353
2354 default: // All else is a mistake
2355 typerr(t);
2356
2357 case Tuple: { // Meeting 2 signatures?
2358 const TypeTuple *x = t->is_tuple();
2359 assert( _cnt == x->_cnt, "" );
2360 const Type **fields = (const Type **)(Compile::current()->type_arena()->AmallocWords( _cnt*sizeof(Type*) ));
2361 for( uint i=0; i<_cnt; i++ )
2362 fields[i] = field_at(i)->xmeet( x->field_at(i) );
2363 return TypeTuple::make(_cnt,fields);
2364 }
2365 case Top:
2366 break;
2367 }
2368 return this; // Return the double constant
2369 }
2370
2371 //------------------------------xdual------------------------------------------
2372 // Dual: compute field-by-field dual
2373 const Type *TypeTuple::xdual() const {
2374 const Type **fields = (const Type **)(Compile::current()->type_arena()->AmallocWords( _cnt*sizeof(Type*) ));
2375 for( uint i=0; i<_cnt; i++ )
2376 fields[i] = _fields[i]->dual();
2377 return new TypeTuple(_cnt,fields);
2378 }
2379
2380 //------------------------------eq---------------------------------------------
2381 // Structural equality check for Type representations
2382 bool TypeTuple::eq( const Type *t ) const {
2383 const TypeTuple *s = (const TypeTuple *)t;
2384 if (_cnt != s->_cnt) return false; // Unequal field counts
2385 for (uint i = 0; i < _cnt; i++)
2386 if (field_at(i) != s->field_at(i)) // POINTER COMPARE! NO RECURSION!
2387 return false; // Missed
2388 return true;
2389 }
2390
2391 //------------------------------hash-------------------------------------------
2392 // Type-specific hashing function.
2393 uint TypeTuple::hash(void) const {
2394 uintptr_t sum = _cnt;
2395 for( uint i=0; i<_cnt; i++ )
2396 sum += (uintptr_t)_fields[i]; // Hash on pointers directly
2397 return (uint)sum;
2398 }
2399
2400 //------------------------------dump2------------------------------------------
2401 // Dump signature Type
2402 #ifndef PRODUCT
2403 void TypeTuple::dump2( Dict &d, uint depth, outputStream *st ) const {
2404 st->print("{");
2405 if( !depth || d[this] ) { // Check for recursive print
2406 st->print("...}");
2407 return;
2408 }
2409 d.Insert((void*)this, (void*)this); // Stop recursion
2410 if( _cnt ) {
2411 uint i;
2412 for( i=0; i<_cnt-1; i++ ) {
2413 st->print("%d:", i);
2414 _fields[i]->dump2(d, depth-1, st);
2415 st->print(", ");
2416 }
2417 st->print("%d:", i);
2418 _fields[i]->dump2(d, depth-1, st);
2419 }
2420 st->print("}");
2421 }
2422 #endif
2423
2424 //------------------------------singleton--------------------------------------
2425 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
2426 // constants (Ldi nodes). Singletons are integer, float or double constants
2427 // or a single symbol.
2428 bool TypeTuple::singleton(void) const {
2429 return false; // Never a singleton
2430 }
2431
2432 bool TypeTuple::empty(void) const {
2433 for( uint i=0; i<_cnt; i++ ) {
2434 if (_fields[i]->empty()) return true;
2435 }
2436 return false;
2437 }
2438
2439 //=============================================================================
2440 // Convenience common pre-built types.
2441
2442 inline const TypeInt* normalize_array_size(const TypeInt* size) {
2443 // Certain normalizations keep us sane when comparing types.
2444 // We do not want arrayOop variables to differ only by the wideness
2445 // of their index types. Pick minimum wideness, since that is the
2446 // forced wideness of small ranges anyway.
2447 if (size->_widen != Type::WidenMin)
2448 return TypeInt::make(size->_lo, size->_hi, Type::WidenMin);
2449 else
2450 return size;
2451 }
2452
2453 //------------------------------make-------------------------------------------
2454 const TypeAry* TypeAry::make(const Type* elem, const TypeInt* size, bool stable,
2455 bool flat, bool not_flat, bool not_null_free) {
2456 if (UseCompressedOops && elem->isa_oopptr()) {
2457 elem = elem->make_narrowoop();
2458 }
2459 size = normalize_array_size(size);
2460 return (TypeAry*)(new TypeAry(elem, size, stable, flat, not_flat, not_null_free))->hashcons();
2461 }
2462
2463 //------------------------------meet-------------------------------------------
2464 // Compute the MEET of two types. It returns a new Type object.
2465 const Type *TypeAry::xmeet( const Type *t ) const {
2466 // Perform a fast test for common case; meeting the same types together.
2467 if( this == t ) return this; // Meeting same type-rep?
2468
2469 // Current "this->_base" is Ary
2470 switch (t->base()) { // switch on original type
2471
2472 case Bottom: // Ye Olde Default
2473 return t;
2474
2475 default: // All else is a mistake
2476 typerr(t);
2477
2478 case Array: { // Meeting 2 arrays?
2479 const TypeAry *a = t->is_ary();
2480 return TypeAry::make(_elem->meet_speculative(a->_elem),
2481 _size->xmeet(a->_size)->is_int(),
2482 _stable && a->_stable,
2483 _flat && a->_flat,
2484 _not_flat && a->_not_flat,
2485 _not_null_free && a->_not_null_free);
2486 }
2487 case Top:
2488 break;
2489 }
2490 return this; // Return the double constant
2491 }
2492
2493 //------------------------------xdual------------------------------------------
2494 // Dual: compute field-by-field dual
2495 const Type *TypeAry::xdual() const {
2496 const TypeInt* size_dual = _size->dual()->is_int();
2497 size_dual = normalize_array_size(size_dual);
2498 return new TypeAry(_elem->dual(), size_dual, !_stable, !_flat, !_not_flat, !_not_null_free);
2499 }
2500
2501 //------------------------------eq---------------------------------------------
2502 // Structural equality check for Type representations
2503 bool TypeAry::eq( const Type *t ) const {
2504 const TypeAry *a = (const TypeAry*)t;
2505 return _elem == a->_elem &&
2506 _stable == a->_stable &&
2507 _size == a->_size &&
2508 _flat == a->_flat &&
2509 _not_flat == a->_not_flat &&
2510 _not_null_free == a->_not_null_free;
2511
2512 }
2513
2514 //------------------------------hash-------------------------------------------
2515 // Type-specific hashing function.
2516 uint TypeAry::hash(void) const {
2517 return (uint)(uintptr_t)_elem + (uint)(uintptr_t)_size + (uint)(_stable ? 43 : 0) +
2518 (uint)(_flat ? 44 : 0) + (uint)(_not_flat ? 45 : 0) + (uint)(_not_null_free ? 46 : 0);
2519 }
2520
2521 /**
2522 * Return same type without a speculative part in the element
2523 */
2524 const TypeAry* TypeAry::remove_speculative() const {
2525 return make(_elem->remove_speculative(), _size, _stable, _flat, _not_flat, _not_null_free);
2526 }
2527
2528 /**
2529 * Return same type with cleaned up speculative part of element
2530 */
2531 const Type* TypeAry::cleanup_speculative() const {
2532 return make(_elem->cleanup_speculative(), _size, _stable, _flat, _not_flat, _not_null_free);
2533 }
2534
2535 /**
2536 * Return same type but with a different inline depth (used for speculation)
2537 *
2538 * @param depth depth to meet with
2539 */
2540 const TypePtr* TypePtr::with_inline_depth(int depth) const {
2541 if (!UseInlineDepthForSpeculativeTypes) {
2542 return this;
2543 }
2544 return make(AnyPtr, _ptr, _offset, _speculative, depth);
2545 }
2546
2547 //------------------------------dump2------------------------------------------
2548 #ifndef PRODUCT
2549 void TypeAry::dump2( Dict &d, uint depth, outputStream *st ) const {
2550 if (_stable) st->print("stable:");
2551 if (_flat) st->print("flat:");
2552 if (Verbose) {
2553 if (_not_flat) st->print("not flat:");
2554 if (_not_null_free) st->print("not null free:");
2555 }
2556 _elem->dump2(d, depth, st);
2557 st->print("[");
2558 _size->dump2(d, depth, st);
2559 st->print("]");
2560 }
2561 #endif
2562
2563 //------------------------------singleton--------------------------------------
2564 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
2565 // constants (Ldi nodes). Singletons are integer, float or double constants
2566 // or a single symbol.
2567 bool TypeAry::singleton(void) const {
2568 return false; // Never a singleton
2569 }
2570
2571 bool TypeAry::empty(void) const {
2572 return _elem->empty() || _size->empty();
2573 }
2574
2575 //--------------------------ary_must_be_exact----------------------------------
2576 bool TypeAry::ary_must_be_exact() const {
2577 // This logic looks at the element type of an array, and returns true
2578 // if the element type is either a primitive or a final instance class.
2579 // In such cases, an array built on this ary must have no subclasses.
2580 if (_elem == BOTTOM) return false; // general array not exact
2581 if (_elem == TOP ) return false; // inverted general array not exact
2582 const TypeOopPtr* toop = nullptr;
2583 if (UseCompressedOops && _elem->isa_narrowoop()) {
2584 toop = _elem->make_ptr()->isa_oopptr();
2585 } else {
2586 toop = _elem->isa_oopptr();
2587 }
2588 if (!toop) return true; // a primitive type, like int
2589 if (!toop->is_loaded()) return false; // unloaded class
2590 const TypeInstPtr* tinst;
2591 if (_elem->isa_narrowoop())
2592 tinst = _elem->make_ptr()->isa_instptr();
2593 else
2594 tinst = _elem->isa_instptr();
2595 if (tinst) {
2596 if (tinst->instance_klass()->is_final()) {
2597 // Even though MyValue is final, [LMyValue is not exact because null-free [LMyValue is a subtype.
2598 if (tinst->is_inlinetypeptr() && (tinst->ptr() == TypePtr::BotPTR || tinst->ptr() == TypePtr::TopPTR)) {
2599 return false;
2600 }
2601 return true;
2602 }
2603 return false;
2604 }
2605 const TypeAryPtr* tap;
2606 if (_elem->isa_narrowoop())
2607 tap = _elem->make_ptr()->isa_aryptr();
2608 else
2609 tap = _elem->isa_aryptr();
2610 if (tap)
2611 return tap->ary()->ary_must_be_exact();
2612 return false;
2613 }
2614
2615 //==============================TypeVect=======================================
2616 // Convenience common pre-built types.
2617 const TypeVect* TypeVect::VECTA = nullptr; // vector length agnostic
2618 const TypeVect* TypeVect::VECTS = nullptr; // 32-bit vectors
2619 const TypeVect* TypeVect::VECTD = nullptr; // 64-bit vectors
2620 const TypeVect* TypeVect::VECTX = nullptr; // 128-bit vectors
2621 const TypeVect* TypeVect::VECTY = nullptr; // 256-bit vectors
2622 const TypeVect* TypeVect::VECTZ = nullptr; // 512-bit vectors
2623 const TypeVect* TypeVect::VECTMASK = nullptr; // predicate/mask vector
2624
2625 //------------------------------make-------------------------------------------
2626 const TypeVect* TypeVect::make(BasicType elem_bt, uint length, bool is_mask) {
2627 if (is_mask) {
2628 return makemask(elem_bt, length);
2629 }
2630 assert(is_java_primitive(elem_bt), "only primitive types in vector");
2631 assert(Matcher::vector_size_supported(elem_bt, length), "length in range");
2632 int size = length * type2aelembytes(elem_bt);
2633 switch (Matcher::vector_ideal_reg(size)) {
2634 case Op_VecA:
2635 return (TypeVect*)(new TypeVectA(elem_bt, length))->hashcons();
2636 case Op_VecS:
2637 return (TypeVect*)(new TypeVectS(elem_bt, length))->hashcons();
2638 case Op_RegL:
2639 case Op_VecD:
2640 case Op_RegD:
2641 return (TypeVect*)(new TypeVectD(elem_bt, length))->hashcons();
2642 case Op_VecX:
2643 return (TypeVect*)(new TypeVectX(elem_bt, length))->hashcons();
2644 case Op_VecY:
2645 return (TypeVect*)(new TypeVectY(elem_bt, length))->hashcons();
2646 case Op_VecZ:
2647 return (TypeVect*)(new TypeVectZ(elem_bt, length))->hashcons();
2648 }
2649 ShouldNotReachHere();
2650 return nullptr;
2651 }
2652
2653 const TypeVect* TypeVect::makemask(BasicType elem_bt, uint length) {
2654 if (Matcher::has_predicated_vectors() &&
2655 Matcher::match_rule_supported_vector_masked(Op_VectorLoadMask, length, elem_bt)) {
2656 return TypeVectMask::make(elem_bt, length);
2657 } else {
2658 return make(elem_bt, length);
2659 }
2660 }
2661
2662 //------------------------------meet-------------------------------------------
2663 // Compute the MEET of two types. Since each TypeVect is the only instance of
2664 // its species, meeting often returns itself
2665 const Type* TypeVect::xmeet(const Type* t) const {
2666 // Perform a fast test for common case; meeting the same types together.
2667 if (this == t) {
2668 return this;
2669 }
2670
2671 // Current "this->_base" is Vector
2672 switch (t->base()) { // switch on original type
2673
2674 case Bottom: // Ye Olde Default
2675 return t;
2676
2677 default: // All else is a mistake
2678 typerr(t);
2679 case VectorMask:
2680 case VectorA:
2681 case VectorS:
2682 case VectorD:
2683 case VectorX:
2684 case VectorY:
2685 case VectorZ: { // Meeting 2 vectors?
2686 const TypeVect* v = t->is_vect();
2687 assert(base() == v->base(), "");
2688 assert(length() == v->length(), "");
2689 assert(element_basic_type() == v->element_basic_type(), "");
2690 return this;
2691 }
2692 case Top:
2693 break;
2694 }
2695 return this;
2696 }
2697
2698 //------------------------------xdual------------------------------------------
2699 // Since each TypeVect is the only instance of its species, it is self-dual
2700 const Type* TypeVect::xdual() const {
2701 return this;
2702 }
2703
2704 //------------------------------eq---------------------------------------------
2705 // Structural equality check for Type representations
2706 bool TypeVect::eq(const Type* t) const {
2707 const TypeVect* v = t->is_vect();
2708 return (element_basic_type() == v->element_basic_type()) && (length() == v->length());
2709 }
2710
2711 //------------------------------hash-------------------------------------------
2712 // Type-specific hashing function.
2713 uint TypeVect::hash(void) const {
2714 return (uint)base() + (uint)(uintptr_t)_elem_bt + (uint)(uintptr_t)_length;
2715 }
2716
2717 //------------------------------singleton--------------------------------------
2718 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
2719 // constants (Ldi nodes). Vector is singleton if all elements are the same
2720 // constant value (when vector is created with Replicate code).
2721 bool TypeVect::singleton(void) const {
2722 // There is no Con node for vectors yet.
2723 // return _elem->singleton();
2724 return false;
2725 }
2726
2727 bool TypeVect::empty(void) const {
2728 return false;
2729 }
2730
2731 //------------------------------dump2------------------------------------------
2732 #ifndef PRODUCT
2733 void TypeVect::dump2(Dict& d, uint depth, outputStream* st) const {
2734 switch (base()) {
2735 case VectorA:
2736 st->print("vectora"); break;
2737 case VectorS:
2738 st->print("vectors"); break;
2739 case VectorD:
2740 st->print("vectord"); break;
2741 case VectorX:
2742 st->print("vectorx"); break;
2743 case VectorY:
2744 st->print("vectory"); break;
2745 case VectorZ:
2746 st->print("vectorz"); break;
2747 case VectorMask:
2748 st->print("vectormask"); break;
2749 default:
2750 ShouldNotReachHere();
2751 }
2752 st->print("<%c,%u>", type2char(element_basic_type()), length());
2753 }
2754 #endif
2755
2756 const TypeVectMask* TypeVectMask::make(const BasicType elem_bt, uint length) {
2757 return (TypeVectMask*) (new TypeVectMask(elem_bt, length))->hashcons();
2758 }
2759
2760 //=============================================================================
2761 // Convenience common pre-built types.
2762 const TypePtr *TypePtr::NULL_PTR;
2763 const TypePtr *TypePtr::NOTNULL;
2764 const TypePtr *TypePtr::BOTTOM;
2765
2766 //------------------------------meet-------------------------------------------
2767 // Meet over the PTR enum
2768 const TypePtr::PTR TypePtr::ptr_meet[TypePtr::lastPTR][TypePtr::lastPTR] = {
2769 // TopPTR, AnyNull, Constant, Null, NotNull, BotPTR,
2770 { /* Top */ TopPTR, AnyNull, Constant, Null, NotNull, BotPTR,},
2771 { /* AnyNull */ AnyNull, AnyNull, Constant, BotPTR, NotNull, BotPTR,},
2772 { /* Constant*/ Constant, Constant, Constant, BotPTR, NotNull, BotPTR,},
2773 { /* Null */ Null, BotPTR, BotPTR, Null, BotPTR, BotPTR,},
2774 { /* NotNull */ NotNull, NotNull, NotNull, BotPTR, NotNull, BotPTR,},
2775 { /* BotPTR */ BotPTR, BotPTR, BotPTR, BotPTR, BotPTR, BotPTR,}
2776 };
2777
2778 //------------------------------make-------------------------------------------
2779 const TypePtr* TypePtr::make(TYPES t, enum PTR ptr, Offset offset, const TypePtr* speculative, int inline_depth) {
2780 return (TypePtr*)(new TypePtr(t,ptr,offset, speculative, inline_depth))->hashcons();
2781 }
2782
2783 //------------------------------cast_to_ptr_type-------------------------------
2784 const TypePtr* TypePtr::cast_to_ptr_type(PTR ptr) const {
2785 assert(_base == AnyPtr, "subclass must override cast_to_ptr_type");
2786 if( ptr == _ptr ) return this;
2787 return make(_base, ptr, _offset, _speculative, _inline_depth);
2788 }
2789
2790 //------------------------------get_con----------------------------------------
2791 intptr_t TypePtr::get_con() const {
2792 assert( _ptr == Null, "" );
2793 return offset();
2794 }
2795
2796 //------------------------------meet-------------------------------------------
2797 // Compute the MEET of two types. It returns a new Type object.
2798 const Type *TypePtr::xmeet(const Type *t) const {
2799 const Type* res = xmeet_helper(t);
2800 if (res->isa_ptr() == nullptr) {
2801 return res;
2802 }
2803
2804 const TypePtr* res_ptr = res->is_ptr();
2805 if (res_ptr->speculative() != nullptr) {
2806 // type->speculative() is null means that speculation is no better
2807 // than type, i.e. type->speculative() == type. So there are 2
2808 // ways to represent the fact that we have no useful speculative
2809 // data and we should use a single one to be able to test for
2810 // equality between types. Check whether type->speculative() ==
2811 // type and set speculative to null if it is the case.
2812 if (res_ptr->remove_speculative() == res_ptr->speculative()) {
2813 return res_ptr->remove_speculative();
2814 }
2815 }
2816
2817 return res;
2818 }
2819
2820 const Type *TypePtr::xmeet_helper(const Type *t) const {
2821 // Perform a fast test for common case; meeting the same types together.
2822 if( this == t ) return this; // Meeting same type-rep?
2823
2824 // Current "this->_base" is AnyPtr
2825 switch (t->base()) { // switch on original type
2826 case Int: // Mixing ints & oops happens when javac
2827 case Long: // reuses local variables
2828 case FloatTop:
2829 case FloatCon:
2830 case FloatBot:
2831 case DoubleTop:
2832 case DoubleCon:
2833 case DoubleBot:
2834 case NarrowOop:
2835 case NarrowKlass:
2836 case Bottom: // Ye Olde Default
2837 return Type::BOTTOM;
2838 case Top:
2839 return this;
2840
2841 case AnyPtr: { // Meeting to AnyPtrs
2842 const TypePtr *tp = t->is_ptr();
2843 const TypePtr* speculative = xmeet_speculative(tp);
2844 int depth = meet_inline_depth(tp->inline_depth());
2845 return make(AnyPtr, meet_ptr(tp->ptr()), meet_offset(tp->offset()), speculative, depth);
2846 }
2847 case RawPtr: // For these, flip the call around to cut down
2848 case OopPtr:
2849 case InstPtr: // on the cases I have to handle.
2850 case AryPtr:
2851 case MetadataPtr:
2852 case KlassPtr:
2853 case InstKlassPtr:
2854 case AryKlassPtr:
2855 return t->xmeet(this); // Call in reverse direction
2856 default: // All else is a mistake
2857 typerr(t);
2858
2859 }
2860 return this;
2861 }
2862
2863 //------------------------------meet_offset------------------------------------
2864 Type::Offset TypePtr::meet_offset(int offset) const {
2865 return _offset.meet(Offset(offset));
2866 }
2867
2868 //------------------------------dual_offset------------------------------------
2869 Type::Offset TypePtr::dual_offset() const {
2870 return _offset.dual();
2871 }
2872
2873 //------------------------------xdual------------------------------------------
2874 // Dual: compute field-by-field dual
2875 const TypePtr::PTR TypePtr::ptr_dual[TypePtr::lastPTR] = {
2876 BotPTR, NotNull, Constant, Null, AnyNull, TopPTR
2877 };
2878 const Type *TypePtr::xdual() const {
2879 return new TypePtr(AnyPtr, dual_ptr(), dual_offset(), dual_speculative(), dual_inline_depth());
2880 }
2881
2882 //------------------------------xadd_offset------------------------------------
2883 Type::Offset TypePtr::xadd_offset(intptr_t offset) const {
2884 return _offset.add(offset);
2885 }
2886
2887 //------------------------------add_offset-------------------------------------
2888 const TypePtr *TypePtr::add_offset( intptr_t offset ) const {
2889 return make(AnyPtr, _ptr, xadd_offset(offset), _speculative, _inline_depth);
2890 }
2891
2892 const TypePtr *TypePtr::with_offset(intptr_t offset) const {
2893 return make(AnyPtr, _ptr, Offset(offset), _speculative, _inline_depth);
2894 }
2895
2896 //------------------------------eq---------------------------------------------
2897 // Structural equality check for Type representations
2898 bool TypePtr::eq( const Type *t ) const {
2899 const TypePtr *a = (const TypePtr*)t;
2900 return _ptr == a->ptr() && _offset == a->_offset && eq_speculative(a) && _inline_depth == a->_inline_depth;
2901 }
2902
2903 //------------------------------hash-------------------------------------------
2904 // Type-specific hashing function.
2905 uint TypePtr::hash(void) const {
2906 return (uint)_ptr + (uint)offset() + (uint)hash_speculative() + (uint)_inline_depth;
2907 }
2908
2909 /**
2910 * Return same type without a speculative part
2911 */
2912 const TypePtr* TypePtr::remove_speculative() const {
2913 if (_speculative == nullptr) {
2914 return this;
2915 }
2916 assert(_inline_depth == InlineDepthTop || _inline_depth == InlineDepthBottom, "non speculative type shouldn't have inline depth");
2917 return make(AnyPtr, _ptr, _offset, nullptr, _inline_depth);
2918 }
2919
2920 /**
2921 * Return same type but drop speculative part if we know we won't use
2922 * it
2923 */
2924 const Type* TypePtr::cleanup_speculative() const {
2925 if (speculative() == nullptr) {
2926 return this;
2927 }
2928 const Type* no_spec = remove_speculative();
2929 // If this is NULL_PTR then we don't need the speculative type
2930 // (with_inline_depth in case the current type inline depth is
2931 // InlineDepthTop)
2932 if (no_spec == NULL_PTR->with_inline_depth(inline_depth())) {
2933 return no_spec;
2934 }
2935 if (above_centerline(speculative()->ptr())) {
2936 return no_spec;
2937 }
2938 const TypeOopPtr* spec_oopptr = speculative()->isa_oopptr();
2939 // If the speculative may be null and is an inexact klass then it
2940 // doesn't help
2941 if (speculative() != TypePtr::NULL_PTR && speculative()->maybe_null() &&
2942 (spec_oopptr == nullptr || !spec_oopptr->klass_is_exact())) {
2943 return no_spec;
2944 }
2945 return this;
2946 }
2947
2948 /**
2949 * dual of the speculative part of the type
2950 */
2951 const TypePtr* TypePtr::dual_speculative() const {
2952 if (_speculative == nullptr) {
2953 return nullptr;
2954 }
2955 return _speculative->dual()->is_ptr();
2956 }
2957
2958 /**
2959 * meet of the speculative parts of 2 types
2960 *
2961 * @param other type to meet with
2962 */
2963 const TypePtr* TypePtr::xmeet_speculative(const TypePtr* other) const {
2964 bool this_has_spec = (_speculative != nullptr);
2965 bool other_has_spec = (other->speculative() != nullptr);
2966
2967 if (!this_has_spec && !other_has_spec) {
2968 return nullptr;
2969 }
2970
2971 // If we are at a point where control flow meets and one branch has
2972 // a speculative type and the other has not, we meet the speculative
2973 // type of one branch with the actual type of the other. If the
2974 // actual type is exact and the speculative is as well, then the
2975 // result is a speculative type which is exact and we can continue
2976 // speculation further.
2977 const TypePtr* this_spec = _speculative;
2978 const TypePtr* other_spec = other->speculative();
2979
2980 if (!this_has_spec) {
2981 this_spec = this;
2982 }
2983
2984 if (!other_has_spec) {
2985 other_spec = other;
2986 }
2987
2988 return this_spec->meet(other_spec)->is_ptr();
2989 }
2990
2991 /**
2992 * dual of the inline depth for this type (used for speculation)
2993 */
2994 int TypePtr::dual_inline_depth() const {
2995 return -inline_depth();
2996 }
2997
2998 /**
2999 * meet of 2 inline depths (used for speculation)
3000 *
3001 * @param depth depth to meet with
3002 */
3003 int TypePtr::meet_inline_depth(int depth) const {
3004 return MAX2(inline_depth(), depth);
3005 }
3006
3007 /**
3008 * Are the speculative parts of 2 types equal?
3009 *
3010 * @param other type to compare this one to
3011 */
3012 bool TypePtr::eq_speculative(const TypePtr* other) const {
3013 if (_speculative == nullptr || other->speculative() == nullptr) {
3014 return _speculative == other->speculative();
3015 }
3016
3017 if (_speculative->base() != other->speculative()->base()) {
3018 return false;
3019 }
3020
3021 return _speculative->eq(other->speculative());
3022 }
3023
3024 /**
3025 * Hash of the speculative part of the type
3026 */
3027 int TypePtr::hash_speculative() const {
3028 if (_speculative == nullptr) {
3029 return 0;
3030 }
3031
3032 return _speculative->hash();
3033 }
3034
3035 /**
3036 * add offset to the speculative part of the type
3037 *
3038 * @param offset offset to add
3039 */
3040 const TypePtr* TypePtr::add_offset_speculative(intptr_t offset) const {
3041 if (_speculative == nullptr) {
3042 return nullptr;
3043 }
3044 return _speculative->add_offset(offset)->is_ptr();
3045 }
3046
3047 const TypePtr* TypePtr::with_offset_speculative(intptr_t offset) const {
3048 if (_speculative == nullptr) {
3049 return nullptr;
3050 }
3051 return _speculative->with_offset(offset)->is_ptr();
3052 }
3053
3054 /**
3055 * return exact klass from the speculative type if there's one
3056 */
3057 ciKlass* TypePtr::speculative_type() const {
3058 if (_speculative != nullptr && _speculative->isa_oopptr()) {
3059 const TypeOopPtr* speculative = _speculative->join(this)->is_oopptr();
3060 if (speculative->klass_is_exact()) {
3061 return speculative->exact_klass();
3062 }
3063 }
3064 return nullptr;
3065 }
3066
3067 /**
3068 * return true if speculative type may be null
3069 */
3070 bool TypePtr::speculative_maybe_null() const {
3071 if (_speculative != nullptr) {
3072 const TypePtr* speculative = _speculative->join(this)->is_ptr();
3073 return speculative->maybe_null();
3074 }
3075 return true;
3076 }
3077
3078 bool TypePtr::speculative_always_null() const {
3079 if (_speculative != nullptr) {
3080 const TypePtr* speculative = _speculative->join(this)->is_ptr();
3081 return speculative == TypePtr::NULL_PTR;
3082 }
3083 return false;
3084 }
3085
3086 /**
3087 * Same as TypePtr::speculative_type() but return the klass only if
3088 * the speculative tells us is not null
3089 */
3090 ciKlass* TypePtr::speculative_type_not_null() const {
3091 if (speculative_maybe_null()) {
3092 return nullptr;
3093 }
3094 return speculative_type();
3095 }
3096
3097 /**
3098 * Check whether new profiling would improve speculative type
3099 *
3100 * @param exact_kls class from profiling
3101 * @param inline_depth inlining depth of profile point
3102 *
3103 * @return true if type profile is valuable
3104 */
3105 bool TypePtr::would_improve_type(ciKlass* exact_kls, int inline_depth) const {
3106 // no profiling?
3107 if (exact_kls == nullptr) {
3108 return false;
3109 }
3110 if (speculative() == TypePtr::NULL_PTR) {
3111 return false;
3112 }
3113 // no speculative type or non exact speculative type?
3114 if (speculative_type() == nullptr) {
3115 return true;
3116 }
3117 // If the node already has an exact speculative type keep it,
3118 // unless it was provided by profiling that is at a deeper
3119 // inlining level. Profiling at a higher inlining depth is
3120 // expected to be less accurate.
3121 if (_speculative->inline_depth() == InlineDepthBottom) {
3122 return false;
3123 }
3124 assert(_speculative->inline_depth() != InlineDepthTop, "can't do the comparison");
3125 return inline_depth < _speculative->inline_depth();
3126 }
3127
3128 /**
3129 * Check whether new profiling would improve ptr (= tells us it is non
3130 * null)
3131 *
3132 * @param ptr_kind always null or not null?
3133 *
3134 * @return true if ptr profile is valuable
3135 */
3136 bool TypePtr::would_improve_ptr(ProfilePtrKind ptr_kind) const {
3137 // profiling doesn't tell us anything useful
3138 if (ptr_kind != ProfileAlwaysNull && ptr_kind != ProfileNeverNull) {
3139 return false;
3140 }
3141 // We already know this is not null
3142 if (!this->maybe_null()) {
3143 return false;
3144 }
3145 // We already know the speculative type cannot be null
3146 if (!speculative_maybe_null()) {
3147 return false;
3148 }
3149 // We already know this is always null
3150 if (this == TypePtr::NULL_PTR) {
3151 return false;
3152 }
3153 // We already know the speculative type is always null
3154 if (speculative_always_null()) {
3155 return false;
3156 }
3157 if (ptr_kind == ProfileAlwaysNull && speculative() != nullptr && speculative()->isa_oopptr()) {
3158 return false;
3159 }
3160 return true;
3161 }
3162
3163 //------------------------------dump2------------------------------------------
3164 const char *const TypePtr::ptr_msg[TypePtr::lastPTR] = {
3165 "TopPTR","AnyNull","Constant","null","NotNull","BotPTR"
3166 };
3167
3168 #ifndef PRODUCT
3169 void TypePtr::dump2( Dict &d, uint depth, outputStream *st ) const {
3170 if( _ptr == Null ) st->print("null");
3171 else st->print("%s *", ptr_msg[_ptr]);
3172 _offset.dump2(st);
3173 dump_inline_depth(st);
3174 dump_speculative(st);
3175 }
3176
3177 /**
3178 *dump the speculative part of the type
3179 */
3180 void TypePtr::dump_speculative(outputStream *st) const {
3181 if (_speculative != nullptr) {
3182 st->print(" (speculative=");
3183 _speculative->dump_on(st);
3184 st->print(")");
3185 }
3186 }
3187
3188 /**
3189 *dump the inline depth of the type
3190 */
3191 void TypePtr::dump_inline_depth(outputStream *st) const {
3192 if (_inline_depth != InlineDepthBottom) {
3193 if (_inline_depth == InlineDepthTop) {
3194 st->print(" (inline_depth=InlineDepthTop)");
3195 } else {
3196 st->print(" (inline_depth=%d)", _inline_depth);
3197 }
3198 }
3199 }
3200 #endif
3201
3202 //------------------------------singleton--------------------------------------
3203 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
3204 // constants
3205 bool TypePtr::singleton(void) const {
3206 // TopPTR, Null, AnyNull, Constant are all singletons
3207 return (_offset != Offset::bottom) && !below_centerline(_ptr);
3208 }
3209
3210 bool TypePtr::empty(void) const {
3211 return (_offset == Offset::top) || above_centerline(_ptr);
3212 }
3213
3214 //=============================================================================
3215 // Convenience common pre-built types.
3216 const TypeRawPtr *TypeRawPtr::BOTTOM;
3217 const TypeRawPtr *TypeRawPtr::NOTNULL;
3218
3219 //------------------------------make-------------------------------------------
3220 const TypeRawPtr *TypeRawPtr::make( enum PTR ptr ) {
3221 assert( ptr != Constant, "what is the constant?" );
3222 assert( ptr != Null, "Use TypePtr for null" );
3223 return (TypeRawPtr*)(new TypeRawPtr(ptr,nullptr))->hashcons();
3224 }
3225
3226 const TypeRawPtr *TypeRawPtr::make(address bits) {
3227 assert(bits != nullptr, "Use TypePtr for null");
3228 return (TypeRawPtr*)(new TypeRawPtr(Constant,bits))->hashcons();
3229 }
3230
3231 //------------------------------cast_to_ptr_type-------------------------------
3232 const TypeRawPtr* TypeRawPtr::cast_to_ptr_type(PTR ptr) const {
3233 assert( ptr != Constant, "what is the constant?" );
3234 assert( ptr != Null, "Use TypePtr for null" );
3235 assert( _bits == nullptr, "Why cast a constant address?");
3236 if( ptr == _ptr ) return this;
3237 return make(ptr);
3238 }
3239
3240 //------------------------------get_con----------------------------------------
3241 intptr_t TypeRawPtr::get_con() const {
3242 assert( _ptr == Null || _ptr == Constant, "" );
3243 return (intptr_t)_bits;
3244 }
3245
3246 //------------------------------meet-------------------------------------------
3247 // Compute the MEET of two types. It returns a new Type object.
3248 const Type *TypeRawPtr::xmeet( const Type *t ) const {
3249 // Perform a fast test for common case; meeting the same types together.
3250 if( this == t ) return this; // Meeting same type-rep?
3251
3252 // Current "this->_base" is RawPtr
3253 switch( t->base() ) { // switch on original type
3254 case Bottom: // Ye Olde Default
3255 return t;
3256 case Top:
3257 return this;
3258 case AnyPtr: // Meeting to AnyPtrs
3259 break;
3260 case RawPtr: { // might be top, bot, any/not or constant
3261 enum PTR tptr = t->is_ptr()->ptr();
3262 enum PTR ptr = meet_ptr( tptr );
3263 if( ptr == Constant ) { // Cannot be equal constants, so...
3264 if( tptr == Constant && _ptr != Constant) return t;
3265 if( _ptr == Constant && tptr != Constant) return this;
3266 ptr = NotNull; // Fall down in lattice
3267 }
3268 return make( ptr );
3269 }
3270
3271 case OopPtr:
3272 case InstPtr:
3273 case AryPtr:
3274 case MetadataPtr:
3275 case KlassPtr:
3276 case InstKlassPtr:
3277 case AryKlassPtr:
3278 return TypePtr::BOTTOM; // Oop meet raw is not well defined
3279 default: // All else is a mistake
3280 typerr(t);
3281 }
3282
3283 // Found an AnyPtr type vs self-RawPtr type
3284 const TypePtr *tp = t->is_ptr();
3285 switch (tp->ptr()) {
3286 case TypePtr::TopPTR: return this;
3287 case TypePtr::BotPTR: return t;
3288 case TypePtr::Null:
3289 if( _ptr == TypePtr::TopPTR ) return t;
3290 return TypeRawPtr::BOTTOM;
3291 case TypePtr::NotNull: return TypePtr::make(AnyPtr, meet_ptr(TypePtr::NotNull), tp->meet_offset(0), tp->speculative(), tp->inline_depth());
3292 case TypePtr::AnyNull:
3293 if( _ptr == TypePtr::Constant) return this;
3294 return make( meet_ptr(TypePtr::AnyNull) );
3295 default: ShouldNotReachHere();
3296 }
3297 return this;
3298 }
3299
3300 //------------------------------xdual------------------------------------------
3301 // Dual: compute field-by-field dual
3302 const Type *TypeRawPtr::xdual() const {
3303 return new TypeRawPtr( dual_ptr(), _bits );
3304 }
3305
3306 //------------------------------add_offset-------------------------------------
3307 const TypePtr* TypeRawPtr::add_offset(intptr_t offset) const {
3308 if( offset == OffsetTop ) return BOTTOM; // Undefined offset-> undefined pointer
3309 if( offset == OffsetBot ) return BOTTOM; // Unknown offset-> unknown pointer
3310 if( offset == 0 ) return this; // No change
3311 switch (_ptr) {
3312 case TypePtr::TopPTR:
3313 case TypePtr::BotPTR:
3314 case TypePtr::NotNull:
3315 return this;
3316 case TypePtr::Constant: {
3317 uintptr_t bits = (uintptr_t)_bits;
3318 uintptr_t sum = bits + offset;
3319 if (( offset < 0 )
3320 ? ( sum > bits ) // Underflow?
3321 : ( sum < bits )) { // Overflow?
3322 return BOTTOM;
3323 } else if ( sum == 0 ) {
3324 return TypePtr::NULL_PTR;
3325 } else {
3326 return make( (address)sum );
3327 }
3328 }
3329 default: ShouldNotReachHere();
3330 }
3331 }
3332
3333 //------------------------------eq---------------------------------------------
3334 // Structural equality check for Type representations
3335 bool TypeRawPtr::eq( const Type *t ) const {
3336 const TypeRawPtr *a = (const TypeRawPtr*)t;
3337 return _bits == a->_bits && TypePtr::eq(t);
3338 }
3339
3340 //------------------------------hash-------------------------------------------
3341 // Type-specific hashing function.
3342 uint TypeRawPtr::hash(void) const {
3343 return (uint)(uintptr_t)_bits + (uint)TypePtr::hash();
3344 }
3345
3346 //------------------------------dump2------------------------------------------
3347 #ifndef PRODUCT
3348 void TypeRawPtr::dump2( Dict &d, uint depth, outputStream *st ) const {
3349 if( _ptr == Constant )
3350 st->print(INTPTR_FORMAT, p2i(_bits));
3351 else
3352 st->print("rawptr:%s", ptr_msg[_ptr]);
3353 }
3354 #endif
3355
3356 //=============================================================================
3357 // Convenience common pre-built type.
3358 const TypeOopPtr *TypeOopPtr::BOTTOM;
3359
3360 TypeInterfaces::TypeInterfaces(ciInstanceKlass** interfaces_base, int nb_interfaces)
3361 : Type(Interfaces), _interfaces(interfaces_base, nb_interfaces),
3362 _hash(0), _exact_klass(nullptr) {
3363 _interfaces.sort(compare);
3364 initialize();
3365 }
3366
3367 const TypeInterfaces* TypeInterfaces::make(GrowableArray<ciInstanceKlass*>* interfaces) {
3368 // hashcons() can only delete the last thing that was allocated: to
3369 // make sure all memory for the newly created TypeInterfaces can be
3370 // freed if an identical one exists, allocate space for the array of
3371 // interfaces right after the TypeInterfaces object so that they
3372 // form a contiguous piece of memory.
3373 int nb_interfaces = interfaces == nullptr ? 0 : interfaces->length();
3374 size_t total_size = sizeof(TypeInterfaces) + nb_interfaces * sizeof(ciInstanceKlass*);
3375
3376 void* allocated_mem = operator new(total_size);
3377 ciInstanceKlass** interfaces_base = (ciInstanceKlass**)((char*)allocated_mem + sizeof(TypeInterfaces));
3378 for (int i = 0; i < nb_interfaces; ++i) {
3379 interfaces_base[i] = interfaces->at(i);
3380 }
3381 TypeInterfaces* result = ::new (allocated_mem) TypeInterfaces(interfaces_base, nb_interfaces);
3382 return (const TypeInterfaces*)result->hashcons();
3383 }
3384
3385 void TypeInterfaces::initialize() {
3386 compute_hash();
3387 compute_exact_klass();
3388 DEBUG_ONLY(_initialized = true;)
3389 }
3390
3391 int TypeInterfaces::compare(ciInstanceKlass* const& k1, ciInstanceKlass* const& k2) {
3392 if ((intptr_t)k1 < (intptr_t)k2) {
3393 return -1;
3394 } else if ((intptr_t)k1 > (intptr_t)k2) {
3395 return 1;
3396 }
3397 return 0;
3398 }
3399
3400 int TypeInterfaces::compare(ciInstanceKlass** k1, ciInstanceKlass** k2) {
3401 return compare(*k1, *k2);
3402 }
3403
3404 bool TypeInterfaces::eq(const Type* t) const {
3405 const TypeInterfaces* other = (const TypeInterfaces*)t;
3406 if (_interfaces.length() != other->_interfaces.length()) {
3407 return false;
3408 }
3409 for (int i = 0; i < _interfaces.length(); i++) {
3410 ciKlass* k1 = _interfaces.at(i);
3411 ciKlass* k2 = other->_interfaces.at(i);
3412 if (!k1->equals(k2)) {
3413 return false;
3414 }
3415 }
3416 return true;
3417 }
3418
3419 bool TypeInterfaces::eq(ciInstanceKlass* k) const {
3420 assert(k->is_loaded(), "should be loaded");
3421 GrowableArray<ciInstanceKlass *>* interfaces = k->transitive_interfaces();
3422 if (_interfaces.length() != interfaces->length()) {
3423 return false;
3424 }
3425 for (int i = 0; i < interfaces->length(); i++) {
3426 bool found = false;
3427 _interfaces.find_sorted<ciInstanceKlass*, compare>(interfaces->at(i), found);
3428 if (!found) {
3429 return false;
3430 }
3431 }
3432 return true;
3433 }
3434
3435
3436 uint TypeInterfaces::hash() const {
3437 assert(_initialized, "must be");
3438 return _hash;
3439 }
3440
3441 const Type* TypeInterfaces::xdual() const {
3442 return this;
3443 }
3444
3445 void TypeInterfaces::compute_hash() {
3446 uint hash = 0;
3447 for (int i = 0; i < _interfaces.length(); i++) {
3448 ciKlass* k = _interfaces.at(i);
3449 hash += k->hash();
3450 }
3451 _hash = hash;
3452 }
3453
3454 static int compare_interfaces(ciInstanceKlass** k1, ciInstanceKlass** k2) {
3455 return (int)((*k1)->ident() - (*k2)->ident());
3456 }
3457
3458 void TypeInterfaces::dump(outputStream* st) const {
3459 if (_interfaces.length() == 0) {
3460 return;
3461 }
3462 ResourceMark rm;
3463 st->print(" (");
3464 GrowableArray<ciInstanceKlass*> interfaces;
3465 interfaces.appendAll(&_interfaces);
3466 // Sort the interfaces so they are listed in the same order from one run to the other of the same compilation
3467 interfaces.sort(compare_interfaces);
3468 for (int i = 0; i < interfaces.length(); i++) {
3469 if (i > 0) {
3470 st->print(",");
3471 }
3472 ciKlass* k = interfaces.at(i);
3473 k->print_name_on(st);
3474 }
3475 st->print(")");
3476 }
3477
3478 #ifdef ASSERT
3479 void TypeInterfaces::verify() const {
3480 for (int i = 1; i < _interfaces.length(); i++) {
3481 ciInstanceKlass* k1 = _interfaces.at(i-1);
3482 ciInstanceKlass* k2 = _interfaces.at(i);
3483 assert(compare(k2, k1) > 0, "should be ordered");
3484 assert(k1 != k2, "no duplicate");
3485 }
3486 }
3487 #endif
3488
3489 const TypeInterfaces* TypeInterfaces::union_with(const TypeInterfaces* other) const {
3490 GrowableArray<ciInstanceKlass*> result_list;
3491 int i = 0;
3492 int j = 0;
3493 while (i < _interfaces.length() || j < other->_interfaces.length()) {
3494 while (i < _interfaces.length() &&
3495 (j >= other->_interfaces.length() ||
3496 compare(_interfaces.at(i), other->_interfaces.at(j)) < 0)) {
3497 result_list.push(_interfaces.at(i));
3498 i++;
3499 }
3500 while (j < other->_interfaces.length() &&
3501 (i >= _interfaces.length() ||
3502 compare(other->_interfaces.at(j), _interfaces.at(i)) < 0)) {
3503 result_list.push(other->_interfaces.at(j));
3504 j++;
3505 }
3506 if (i < _interfaces.length() &&
3507 j < other->_interfaces.length() &&
3508 _interfaces.at(i) == other->_interfaces.at(j)) {
3509 result_list.push(_interfaces.at(i));
3510 i++;
3511 j++;
3512 }
3513 }
3514 const TypeInterfaces* result = TypeInterfaces::make(&result_list);
3515 #ifdef ASSERT
3516 result->verify();
3517 for (int i = 0; i < _interfaces.length(); i++) {
3518 assert(result->_interfaces.contains(_interfaces.at(i)), "missing");
3519 }
3520 for (int i = 0; i < other->_interfaces.length(); i++) {
3521 assert(result->_interfaces.contains(other->_interfaces.at(i)), "missing");
3522 }
3523 for (int i = 0; i < result->_interfaces.length(); i++) {
3524 assert(_interfaces.contains(result->_interfaces.at(i)) || other->_interfaces.contains(result->_interfaces.at(i)), "missing");
3525 }
3526 #endif
3527 return result;
3528 }
3529
3530 const TypeInterfaces* TypeInterfaces::intersection_with(const TypeInterfaces* other) const {
3531 GrowableArray<ciInstanceKlass*> result_list;
3532 int i = 0;
3533 int j = 0;
3534 while (i < _interfaces.length() || j < other->_interfaces.length()) {
3535 while (i < _interfaces.length() &&
3536 (j >= other->_interfaces.length() ||
3537 compare(_interfaces.at(i), other->_interfaces.at(j)) < 0)) {
3538 i++;
3539 }
3540 while (j < other->_interfaces.length() &&
3541 (i >= _interfaces.length() ||
3542 compare(other->_interfaces.at(j), _interfaces.at(i)) < 0)) {
3543 j++;
3544 }
3545 if (i < _interfaces.length() &&
3546 j < other->_interfaces.length() &&
3547 _interfaces.at(i) == other->_interfaces.at(j)) {
3548 result_list.push(_interfaces.at(i));
3549 i++;
3550 j++;
3551 }
3552 }
3553 const TypeInterfaces* result = TypeInterfaces::make(&result_list);
3554 #ifdef ASSERT
3555 result->verify();
3556 for (int i = 0; i < _interfaces.length(); i++) {
3557 assert(!other->_interfaces.contains(_interfaces.at(i)) || result->_interfaces.contains(_interfaces.at(i)), "missing");
3558 }
3559 for (int i = 0; i < other->_interfaces.length(); i++) {
3560 assert(!_interfaces.contains(other->_interfaces.at(i)) || result->_interfaces.contains(other->_interfaces.at(i)), "missing");
3561 }
3562 for (int i = 0; i < result->_interfaces.length(); i++) {
3563 assert(_interfaces.contains(result->_interfaces.at(i)) && other->_interfaces.contains(result->_interfaces.at(i)), "missing");
3564 }
3565 #endif
3566 return result;
3567 }
3568
3569 // Is there a single ciKlass* that can represent the interface set?
3570 ciInstanceKlass* TypeInterfaces::exact_klass() const {
3571 assert(_initialized, "must be");
3572 return _exact_klass;
3573 }
3574
3575 void TypeInterfaces::compute_exact_klass() {
3576 if (_interfaces.length() == 0) {
3577 _exact_klass = nullptr;
3578 return;
3579 }
3580 ciInstanceKlass* res = nullptr;
3581 for (int i = 0; i < _interfaces.length(); i++) {
3582 ciInstanceKlass* interface = _interfaces.at(i);
3583 if (eq(interface)) {
3584 assert(res == nullptr, "");
3585 res = interface;
3586 }
3587 }
3588 _exact_klass = res;
3589 }
3590
3591 #ifdef ASSERT
3592 void TypeInterfaces::verify_is_loaded() const {
3593 for (int i = 0; i < _interfaces.length(); i++) {
3594 ciKlass* interface = _interfaces.at(i);
3595 assert(interface->is_loaded(), "Interface not loaded");
3596 }
3597 }
3598 #endif
3599
3600 // Can't be implemented because there's no way to know if the type is above or below the center line.
3601 const Type* TypeInterfaces::xmeet(const Type* t) const {
3602 ShouldNotReachHere();
3603 return Type::xmeet(t);
3604 }
3605
3606 bool TypeInterfaces::singleton(void) const {
3607 ShouldNotReachHere();
3608 return Type::singleton();
3609 }
3610
3611 //------------------------------TypeOopPtr-------------------------------------
3612 TypeOopPtr::TypeOopPtr(TYPES t, PTR ptr, ciKlass* k, const TypeInterfaces* interfaces, bool xk, ciObject* o, Offset offset, Offset field_offset,
3613 int instance_id, const TypePtr* speculative, int inline_depth)
3614 : TypePtr(t, ptr, offset, speculative, inline_depth),
3615 _const_oop(o), _klass(k),
3616 _interfaces(interfaces),
3617 _klass_is_exact(xk),
3618 _is_ptr_to_narrowoop(false),
3619 _is_ptr_to_narrowklass(false),
3620 _is_ptr_to_boxed_value(false),
3621 _instance_id(instance_id) {
3622 #ifdef ASSERT
3623 if (klass() != nullptr && klass()->is_loaded()) {
3624 interfaces->verify_is_loaded();
3625 }
3626 #endif
3627 if (Compile::current()->eliminate_boxing() && (t == InstPtr) &&
3628 (offset.get() > 0) && xk && (k != nullptr) && k->is_instance_klass()) {
3629 _is_ptr_to_boxed_value = k->as_instance_klass()->is_boxed_value_offset(offset.get());
3630 }
3631 #ifdef _LP64
3632 if (this->offset() > 0 || this->offset() == Type::OffsetTop || this->offset() == Type::OffsetBot) {
3633 if (this->offset() == oopDesc::klass_offset_in_bytes()) {
3634 _is_ptr_to_narrowklass = UseCompressedClassPointers;
3635 } else if (klass() == nullptr) {
3636 // Array with unknown body type
3637 assert(this->isa_aryptr(), "only arrays without klass");
3638 _is_ptr_to_narrowoop = UseCompressedOops;
3639 } else if (UseCompressedOops && this->isa_aryptr() && this->offset() != arrayOopDesc::length_offset_in_bytes()) {
3640 if (klass()->is_obj_array_klass()) {
3641 _is_ptr_to_narrowoop = true;
3642 } else if (klass()->is_flat_array_klass() && field_offset != Offset::top && field_offset != Offset::bottom) {
3643 // Check if the field of the inline type array element contains oops
3644 ciInlineKlass* vk = klass()->as_flat_array_klass()->element_klass()->as_inline_klass();
3645 int foffset = field_offset.get() + vk->first_field_offset();
3646 ciField* field = vk->get_field_by_offset(foffset, false);
3647 assert(field != nullptr, "missing field");
3648 BasicType bt = field->layout_type();
3649 _is_ptr_to_narrowoop = UseCompressedOops && ::is_reference_type(bt);
3650 }
3651 } else if (klass()->is_instance_klass()) {
3652 if (this->isa_klassptr()) {
3653 // Perm objects don't use compressed references
3654 } else if (_offset == Offset::bottom || _offset == Offset::top) {
3655 // unsafe access
3656 _is_ptr_to_narrowoop = UseCompressedOops;
3657 } else {
3658 assert(this->isa_instptr(), "must be an instance ptr.");
3659 if (klass() == ciEnv::current()->Class_klass() &&
3660 (this->offset() == java_lang_Class::klass_offset() ||
3661 this->offset() == java_lang_Class::array_klass_offset())) {
3662 // Special hidden fields from the Class.
3663 assert(this->isa_instptr(), "must be an instance ptr.");
3664 _is_ptr_to_narrowoop = false;
3665 } else if (klass() == ciEnv::current()->Class_klass() &&
3666 this->offset() >= InstanceMirrorKlass::offset_of_static_fields()) {
3667 // Static fields
3668 ciField* field = nullptr;
3669 if (const_oop() != nullptr) {
3670 ciInstanceKlass* k = const_oop()->as_instance()->java_lang_Class_klass()->as_instance_klass();
3671 field = k->get_field_by_offset(this->offset(), true);
3672 }
3673 if (field != nullptr) {
3674 BasicType basic_elem_type = field->layout_type();
3675 _is_ptr_to_narrowoop = UseCompressedOops && ::is_reference_type(basic_elem_type);
3676 } else {
3677 // unsafe access
3678 _is_ptr_to_narrowoop = UseCompressedOops;
3679 }
3680 } else {
3681 // Instance fields which contains a compressed oop references.
3682 ciInstanceKlass* ik = klass()->as_instance_klass();
3683 ciField* field = ik->get_field_by_offset(this->offset(), false);
3684 if (field != nullptr) {
3685 BasicType basic_elem_type = field->layout_type();
3686 _is_ptr_to_narrowoop = UseCompressedOops && ::is_reference_type(basic_elem_type);
3687 } else if (klass()->equals(ciEnv::current()->Object_klass())) {
3688 // Compile::find_alias_type() cast exactness on all types to verify
3689 // that it does not affect alias type.
3690 _is_ptr_to_narrowoop = UseCompressedOops;
3691 } else {
3692 // Type for the copy start in LibraryCallKit::inline_native_clone().
3693 _is_ptr_to_narrowoop = UseCompressedOops;
3694 }
3695 }
3696 }
3697 }
3698 }
3699 #endif
3700 }
3701
3702 //------------------------------make-------------------------------------------
3703 const TypeOopPtr *TypeOopPtr::make(PTR ptr, Offset offset, int instance_id,
3704 const TypePtr* speculative, int inline_depth) {
3705 assert(ptr != Constant, "no constant generic pointers");
3706 ciKlass* k = Compile::current()->env()->Object_klass();
3707 bool xk = false;
3708 ciObject* o = nullptr;
3709 const TypeInterfaces* interfaces = TypeInterfaces::make();
3710 return (TypeOopPtr*)(new TypeOopPtr(OopPtr, ptr, k, interfaces, xk, o, offset, Offset::bottom, instance_id, speculative, inline_depth))->hashcons();
3711 }
3712
3713
3714 //------------------------------cast_to_ptr_type-------------------------------
3715 const TypeOopPtr* TypeOopPtr::cast_to_ptr_type(PTR ptr) const {
3716 assert(_base == OopPtr, "subclass must override cast_to_ptr_type");
3717 if( ptr == _ptr ) return this;
3718 return make(ptr, _offset, _instance_id, _speculative, _inline_depth);
3719 }
3720
3721 //-----------------------------cast_to_instance_id----------------------------
3722 const TypeOopPtr *TypeOopPtr::cast_to_instance_id(int instance_id) const {
3723 // There are no instances of a general oop.
3724 // Return self unchanged.
3725 return this;
3726 }
3727
3728 //-----------------------------cast_to_exactness-------------------------------
3729 const TypeOopPtr* TypeOopPtr::cast_to_exactness(bool klass_is_exact) const {
3730 // There is no such thing as an exact general oop.
3731 // Return self unchanged.
3732 return this;
3733 }
3734
3735 //------------------------------as_klass_type----------------------------------
3736 // Return the klass type corresponding to this instance or array type.
3737 // It is the type that is loaded from an object of this type.
3738 const TypeKlassPtr* TypeOopPtr::as_klass_type(bool try_for_exact) const {
3739 ShouldNotReachHere();
3740 return nullptr;
3741 }
3742
3743 //------------------------------meet-------------------------------------------
3744 // Compute the MEET of two types. It returns a new Type object.
3745 const Type *TypeOopPtr::xmeet_helper(const Type *t) const {
3746 // Perform a fast test for common case; meeting the same types together.
3747 if( this == t ) return this; // Meeting same type-rep?
3748
3749 // Current "this->_base" is OopPtr
3750 switch (t->base()) { // switch on original type
3751
3752 case Int: // Mixing ints & oops happens when javac
3753 case Long: // reuses local variables
3754 case FloatTop:
3755 case FloatCon:
3756 case FloatBot:
3757 case DoubleTop:
3758 case DoubleCon:
3759 case DoubleBot:
3760 case NarrowOop:
3761 case NarrowKlass:
3762 case Bottom: // Ye Olde Default
3763 return Type::BOTTOM;
3764 case Top:
3765 return this;
3766
3767 default: // All else is a mistake
3768 typerr(t);
3769
3770 case RawPtr:
3771 case MetadataPtr:
3772 case KlassPtr:
3773 case InstKlassPtr:
3774 case AryKlassPtr:
3775 return TypePtr::BOTTOM; // Oop meet raw is not well defined
3776
3777 case AnyPtr: {
3778 // Found an AnyPtr type vs self-OopPtr type
3779 const TypePtr *tp = t->is_ptr();
3780 Offset offset = meet_offset(tp->offset());
3781 PTR ptr = meet_ptr(tp->ptr());
3782 const TypePtr* speculative = xmeet_speculative(tp);
3783 int depth = meet_inline_depth(tp->inline_depth());
3784 switch (tp->ptr()) {
3785 case Null:
3786 if (ptr == Null) return TypePtr::make(AnyPtr, ptr, offset, speculative, depth);
3787 // else fall through:
3788 case TopPTR:
3789 case AnyNull: {
3790 int instance_id = meet_instance_id(InstanceTop);
3791 return make(ptr, offset, instance_id, speculative, depth);
3792 }
3793 case BotPTR:
3794 case NotNull:
3795 return TypePtr::make(AnyPtr, ptr, offset, speculative, depth);
3796 default: typerr(t);
3797 }
3798 }
3799
3800 case OopPtr: { // Meeting to other OopPtrs
3801 const TypeOopPtr *tp = t->is_oopptr();
3802 int instance_id = meet_instance_id(tp->instance_id());
3803 const TypePtr* speculative = xmeet_speculative(tp);
3804 int depth = meet_inline_depth(tp->inline_depth());
3805 return make(meet_ptr(tp->ptr()), meet_offset(tp->offset()), instance_id, speculative, depth);
3806 }
3807
3808 case InstPtr: // For these, flip the call around to cut down
3809 case AryPtr:
3810 return t->xmeet(this); // Call in reverse direction
3811
3812 } // End of switch
3813 return this; // Return the double constant
3814 }
3815
3816
3817 //------------------------------xdual------------------------------------------
3818 // Dual of a pure heap pointer. No relevant klass or oop information.
3819 const Type *TypeOopPtr::xdual() const {
3820 assert(klass() == Compile::current()->env()->Object_klass(), "no klasses here");
3821 assert(const_oop() == nullptr, "no constants here");
3822 return new TypeOopPtr(_base, dual_ptr(), klass(), _interfaces, klass_is_exact(), const_oop(), dual_offset(), Offset::bottom, dual_instance_id(), dual_speculative(), dual_inline_depth());
3823 }
3824
3825 //--------------------------make_from_klass_common-----------------------------
3826 // Computes the element-type given a klass.
3827 const TypeOopPtr* TypeOopPtr::make_from_klass_common(ciKlass *klass, bool klass_change, bool try_for_exact, InterfaceHandling interface_handling) {
3828 if (klass->is_instance_klass() || klass->is_inlinetype()) {
3829 Compile* C = Compile::current();
3830 Dependencies* deps = C->dependencies();
3831 assert((deps != nullptr) == (C->method() != nullptr && C->method()->code_size() > 0), "sanity");
3832 // Element is an instance
3833 bool klass_is_exact = false;
3834 if (klass->is_loaded()) {
3835 // Try to set klass_is_exact.
3836 ciInstanceKlass* ik = klass->as_instance_klass();
3837 klass_is_exact = ik->is_final();
3838 if (!klass_is_exact && klass_change
3839 && deps != nullptr && UseUniqueSubclasses) {
3840 ciInstanceKlass* sub = ik->unique_concrete_subklass();
3841 if (sub != nullptr) {
3842 deps->assert_abstract_with_unique_concrete_subtype(ik, sub);
3843 klass = ik = sub;
3844 klass_is_exact = sub->is_final();
3845 }
3846 }
3847 if (!klass_is_exact && try_for_exact && deps != nullptr &&
3848 !ik->is_interface() && !ik->has_subklass()) {
3849 // Add a dependence; if concrete subclass added we need to recompile
3850 deps->assert_leaf_type(ik);
3851 klass_is_exact = true;
3852 }
3853 }
3854 const TypeInterfaces* interfaces = TypePtr::interfaces(klass, true, true, false, interface_handling);
3855 return TypeInstPtr::make(TypePtr::BotPTR, klass, interfaces, klass_is_exact, nullptr, Offset(0));
3856 } else if (klass->is_obj_array_klass()) {
3857 // Element is an object or inline type array. Recursively call ourself.
3858 const TypeOopPtr* etype = TypeOopPtr::make_from_klass_common(klass->as_array_klass()->element_klass(), /* klass_change= */ false, try_for_exact, interface_handling);
3859 // Determine null-free/flat properties
3860 const TypeOopPtr* exact_etype = etype;
3861 if (etype->can_be_inline_type()) {
3862 // Use exact type if element can be an inline type
3863 exact_etype = TypeOopPtr::make_from_klass_common(klass->as_array_klass()->element_klass(), /* klass_change= */ true, /* try_for_exact= */ true, interface_handling);
3864 }
3865 bool not_null_free = !exact_etype->can_be_inline_type();
3866 bool not_flat = !UseFlatArray || not_null_free || (exact_etype->is_inlinetypeptr() && !exact_etype->inline_klass()->flat_in_array());
3867 // Even though MyValue is final, [LMyValue is not exact because null-free [LMyValue is a subtype.
3868 bool xk = etype->klass_is_exact() && !etype->is_inlinetypeptr();
3869 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::POS, /* stable= */ false, /* flat= */ false, not_flat, not_null_free);
3870 // We used to pass NotNull in here, asserting that the sub-arrays
3871 // are all not-null. This is not true in generally, as code can
3872 // slam nullptrs down in the subarrays.
3873 const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::BotPTR, arr0, nullptr, xk, Offset(0));
3874 return arr;
3875 } else if (klass->is_type_array_klass()) {
3876 // Element is an typeArray
3877 const Type* etype = get_const_basic_type(klass->as_type_array_klass()->element_type());
3878 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::POS,
3879 /* stable= */ false, /* flat= */ false, /* not_flat= */ true, /* not_null_free= */ true);
3880 // We used to pass NotNull in here, asserting that the array pointer
3881 // is not-null. That was not true in general.
3882 const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::BotPTR, arr0, klass, true, Offset(0));
3883 return arr;
3884 } else if (klass->is_flat_array_klass()) {
3885 const TypeOopPtr* etype = TypeOopPtr::make_from_klass_raw(klass->as_array_klass()->element_klass(), trust_interfaces);
3886 etype = etype->join_speculative(TypePtr::NOTNULL)->is_oopptr();
3887 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::POS, /* stable= */ false, /* flat= */ true);
3888 const TypeAryPtr* arr = TypeAryPtr::make(TypePtr::BotPTR, arr0, klass, true, Offset(0));
3889 return arr;
3890 } else {
3891 ShouldNotReachHere();
3892 return nullptr;
3893 }
3894 }
3895
3896 //------------------------------make_from_constant-----------------------------
3897 // Make a java pointer from an oop constant
3898 const TypeOopPtr* TypeOopPtr::make_from_constant(ciObject* o, bool require_constant) {
3899 assert(!o->is_null_object(), "null object not yet handled here.");
3900
3901 const bool make_constant = require_constant || o->should_be_constant();
3902
3903 ciKlass* klass = o->klass();
3904 if (klass->is_instance_klass() || klass->is_inlinetype()) {
3905 // Element is an instance or inline type
3906 if (make_constant) {
3907 return TypeInstPtr::make(o);
3908 } else {
3909 return TypeInstPtr::make(TypePtr::NotNull, klass, true, nullptr, Offset(0));
3910 }
3911 } else if (klass->is_obj_array_klass()) {
3912 // Element is an object array. Recursively call ourself.
3913 const TypeOopPtr* etype = TypeOopPtr::make_from_klass_raw(klass->as_array_klass()->element_klass(), trust_interfaces);
3914 bool is_flat = o->as_obj_array()->is_flat();
3915 bool is_null_free = o->as_obj_array()->is_null_free();
3916 if (is_null_free) {
3917 etype = etype->join_speculative(TypePtr::NOTNULL)->is_oopptr();
3918 }
3919 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::make(o->as_array()->length()),
3920 /* stable= */ false, /* flat= */ false, /* not_flat= */ !is_flat, /* not_null_free= */ !is_null_free);
3921 // We used to pass NotNull in here, asserting that the sub-arrays
3922 // are all not-null. This is not true in generally, as code can
3923 // slam nulls down in the subarrays.
3924 if (make_constant) {
3925 return TypeAryPtr::make(TypePtr::Constant, o, arr0, klass, true, Offset(0));
3926 } else {
3927 return TypeAryPtr::make(TypePtr::NotNull, arr0, klass, true, Offset(0));
3928 }
3929 } else if (klass->is_type_array_klass()) {
3930 // Element is an typeArray
3931 const Type* etype = (Type*)get_const_basic_type(klass->as_type_array_klass()->element_type());
3932 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::make(o->as_array()->length()),
3933 /* stable= */ false, /* flat= */ false, /* not_flat= */ true, /* not_null_free= */ true);
3934 // We used to pass NotNull in here, asserting that the array pointer
3935 // is not-null. That was not true in general.
3936 if (make_constant) {
3937 return TypeAryPtr::make(TypePtr::Constant, o, arr0, klass, true, Offset(0));
3938 } else {
3939 return TypeAryPtr::make(TypePtr::NotNull, arr0, klass, true, Offset(0));
3940 }
3941 } else if (klass->is_flat_array_klass()) {
3942 const TypeOopPtr* etype = TypeOopPtr::make_from_klass_raw(klass->as_array_klass()->element_klass(), trust_interfaces);
3943 etype = etype->join_speculative(TypePtr::NOTNULL)->is_oopptr();
3944 const TypeAry* arr0 = TypeAry::make(etype, TypeInt::make(o->as_array()->length()), /* stable= */ false, /* flat= */ true);
3945 // We used to pass NotNull in here, asserting that the sub-arrays
3946 // are all not-null. This is not true in generally, as code can
3947 // slam nullptrs down in the subarrays.
3948 if (make_constant) {
3949 return TypeAryPtr::make(TypePtr::Constant, o, arr0, klass, true, Offset(0));
3950 } else {
3951 return TypeAryPtr::make(TypePtr::NotNull, arr0, klass, true, Offset(0));
3952 }
3953 }
3954
3955 fatal("unhandled object type");
3956 return nullptr;
3957 }
3958
3959 //------------------------------get_con----------------------------------------
3960 intptr_t TypeOopPtr::get_con() const {
3961 assert( _ptr == Null || _ptr == Constant, "" );
3962 assert(offset() >= 0, "");
3963
3964 if (offset() != 0) {
3965 // After being ported to the compiler interface, the compiler no longer
3966 // directly manipulates the addresses of oops. Rather, it only has a pointer
3967 // to a handle at compile time. This handle is embedded in the generated
3968 // code and dereferenced at the time the nmethod is made. Until that time,
3969 // it is not reasonable to do arithmetic with the addresses of oops (we don't
3970 // have access to the addresses!). This does not seem to currently happen,
3971 // but this assertion here is to help prevent its occurrence.
3972 tty->print_cr("Found oop constant with non-zero offset");
3973 ShouldNotReachHere();
3974 }
3975
3976 return (intptr_t)const_oop()->constant_encoding();
3977 }
3978
3979
3980 //-----------------------------filter------------------------------------------
3981 // Do not allow interface-vs.-noninterface joins to collapse to top.
3982 const Type *TypeOopPtr::filter_helper(const Type *kills, bool include_speculative) const {
3983
3984 const Type* ft = join_helper(kills, include_speculative);
3985 const TypeInstPtr* ftip = ft->isa_instptr();
3986 const TypeInstPtr* ktip = kills->isa_instptr();
3987
3988 if (ft->empty()) {
3989 return Type::TOP; // Canonical empty value
3990 }
3991
3992 return ft;
3993 }
3994
3995 //------------------------------eq---------------------------------------------
3996 // Structural equality check for Type representations
3997 bool TypeOopPtr::eq( const Type *t ) const {
3998 const TypeOopPtr *a = (const TypeOopPtr*)t;
3999 if (_klass_is_exact != a->_klass_is_exact ||
4000 _instance_id != a->_instance_id) return false;
4001 ciObject* one = const_oop();
4002 ciObject* two = a->const_oop();
4003 if (one == nullptr || two == nullptr) {
4004 return (one == two) && TypePtr::eq(t);
4005 } else {
4006 return one->equals(two) && TypePtr::eq(t);
4007 }
4008 }
4009
4010 //------------------------------hash-------------------------------------------
4011 // Type-specific hashing function.
4012 uint TypeOopPtr::hash(void) const {
4013 return
4014 (uint)(const_oop() ? const_oop()->hash() : 0) +
4015 (uint)_klass_is_exact +
4016 (uint)_instance_id + TypePtr::hash();
4017 }
4018
4019 //------------------------------dump2------------------------------------------
4020 #ifndef PRODUCT
4021 void TypeOopPtr::dump2( Dict &d, uint depth, outputStream *st ) const {
4022 st->print("oopptr:%s", ptr_msg[_ptr]);
4023 if( _klass_is_exact ) st->print(":exact");
4024 if( const_oop() ) st->print(INTPTR_FORMAT, p2i(const_oop()));
4025 _offset.dump2(st);
4026 if (_instance_id == InstanceTop)
4027 st->print(",iid=top");
4028 else if (_instance_id != InstanceBot)
4029 st->print(",iid=%d",_instance_id);
4030
4031 dump_inline_depth(st);
4032 dump_speculative(st);
4033 }
4034 #endif
4035
4036 //------------------------------singleton--------------------------------------
4037 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
4038 // constants
4039 bool TypeOopPtr::singleton(void) const {
4040 // detune optimizer to not generate constant oop + constant offset as a constant!
4041 // TopPTR, Null, AnyNull, Constant are all singletons
4042 return (offset() == 0) && !below_centerline(_ptr);
4043 }
4044
4045 //------------------------------add_offset-------------------------------------
4046 const TypePtr* TypeOopPtr::add_offset(intptr_t offset) const {
4047 return make(_ptr, xadd_offset(offset), _instance_id, add_offset_speculative(offset), _inline_depth);
4048 }
4049
4050 const TypeOopPtr* TypeOopPtr::with_offset(intptr_t offset) const {
4051 return make(_ptr, Offset(offset), _instance_id, with_offset_speculative(offset), _inline_depth);
4052 }
4053
4054 /**
4055 * Return same type without a speculative part
4056 */
4057 const TypeOopPtr* TypeOopPtr::remove_speculative() const {
4058 if (_speculative == nullptr) {
4059 return this;
4060 }
4061 assert(_inline_depth == InlineDepthTop || _inline_depth == InlineDepthBottom, "non speculative type shouldn't have inline depth");
4062 return make(_ptr, _offset, _instance_id, nullptr, _inline_depth);
4063 }
4064
4065 /**
4066 * Return same type but drop speculative part if we know we won't use
4067 * it
4068 */
4069 const Type* TypeOopPtr::cleanup_speculative() const {
4070 // If the klass is exact and the ptr is not null then there's
4071 // nothing that the speculative type can help us with
4072 if (klass_is_exact() && !maybe_null()) {
4073 return remove_speculative();
4074 }
4075 return TypePtr::cleanup_speculative();
4076 }
4077
4078 /**
4079 * Return same type but with a different inline depth (used for speculation)
4080 *
4081 * @param depth depth to meet with
4082 */
4083 const TypePtr* TypeOopPtr::with_inline_depth(int depth) const {
4084 if (!UseInlineDepthForSpeculativeTypes) {
4085 return this;
4086 }
4087 return make(_ptr, _offset, _instance_id, _speculative, depth);
4088 }
4089
4090 //------------------------------with_instance_id--------------------------------
4091 const TypePtr* TypeOopPtr::with_instance_id(int instance_id) const {
4092 assert(_instance_id != -1, "should be known");
4093 return make(_ptr, _offset, instance_id, _speculative, _inline_depth);
4094 }
4095
4096 //------------------------------meet_instance_id--------------------------------
4097 int TypeOopPtr::meet_instance_id( int instance_id ) const {
4098 // Either is 'TOP' instance? Return the other instance!
4099 if( _instance_id == InstanceTop ) return instance_id;
4100 if( instance_id == InstanceTop ) return _instance_id;
4101 // If either is different, return 'BOTTOM' instance
4102 if( _instance_id != instance_id ) return InstanceBot;
4103 return _instance_id;
4104 }
4105
4106 //------------------------------dual_instance_id--------------------------------
4107 int TypeOopPtr::dual_instance_id( ) const {
4108 if( _instance_id == InstanceTop ) return InstanceBot; // Map TOP into BOTTOM
4109 if( _instance_id == InstanceBot ) return InstanceTop; // Map BOTTOM into TOP
4110 return _instance_id; // Map everything else into self
4111 }
4112
4113
4114 const TypeInterfaces* TypeOopPtr::meet_interfaces(const TypeOopPtr* other) const {
4115 if (above_centerline(_ptr) && above_centerline(other->_ptr)) {
4116 return _interfaces->union_with(other->_interfaces);
4117 } else if (above_centerline(_ptr) && !above_centerline(other->_ptr)) {
4118 return other->_interfaces;
4119 } else if (above_centerline(other->_ptr) && !above_centerline(_ptr)) {
4120 return _interfaces;
4121 }
4122 return _interfaces->intersection_with(other->_interfaces);
4123 }
4124
4125 /**
4126 * Check whether new profiling would improve speculative type
4127 *
4128 * @param exact_kls class from profiling
4129 * @param inline_depth inlining depth of profile point
4130 *
4131 * @return true if type profile is valuable
4132 */
4133 bool TypeOopPtr::would_improve_type(ciKlass* exact_kls, int inline_depth) const {
4134 // no way to improve an already exact type
4135 if (klass_is_exact()) {
4136 return false;
4137 }
4138 return TypePtr::would_improve_type(exact_kls, inline_depth);
4139 }
4140
4141 //=============================================================================
4142 // Convenience common pre-built types.
4143 const TypeInstPtr *TypeInstPtr::NOTNULL;
4144 const TypeInstPtr *TypeInstPtr::BOTTOM;
4145 const TypeInstPtr *TypeInstPtr::MIRROR;
4146 const TypeInstPtr *TypeInstPtr::MARK;
4147 const TypeInstPtr *TypeInstPtr::KLASS;
4148
4149 // Is there a single ciKlass* that can represent that type?
4150 ciKlass* TypeInstPtr::exact_klass_helper() const {
4151 if (_interfaces->empty()) {
4152 return _klass;
4153 }
4154 if (_klass != ciEnv::current()->Object_klass()) {
4155 if (_interfaces->eq(_klass->as_instance_klass())) {
4156 return _klass;
4157 }
4158 return nullptr;
4159 }
4160 return _interfaces->exact_klass();
4161 }
4162
4163 //------------------------------TypeInstPtr-------------------------------------
4164 TypeInstPtr::TypeInstPtr(PTR ptr, ciKlass* k, const TypeInterfaces* interfaces, bool xk, ciObject* o, Offset off,
4165 bool flat_in_array, int instance_id, const TypePtr* speculative, int inline_depth)
4166 : TypeOopPtr(InstPtr, ptr, k, interfaces, xk, o, off, Offset::bottom, instance_id, speculative, inline_depth),
4167 _flat_in_array(flat_in_array) {
4168 assert(k == nullptr || !k->is_loaded() || !k->is_interface(), "no interface here");
4169 assert(k != nullptr &&
4170 (k->is_loaded() || o == nullptr),
4171 "cannot have constants with non-loaded klass");
4172 assert(!klass()->flat_in_array() || flat_in_array, "Should be flat in array");
4173 assert(!flat_in_array || can_be_inline_type(), "Only inline types can be flat in array");
4174 };
4175
4176 //------------------------------make-------------------------------------------
4177 const TypeInstPtr *TypeInstPtr::make(PTR ptr,
4178 ciKlass* k,
4179 const TypeInterfaces* interfaces,
4180 bool xk,
4181 ciObject* o,
4182 Offset offset,
4183 bool flat_in_array,
4184 int instance_id,
4185 const TypePtr* speculative,
4186 int inline_depth) {
4187 assert( !k->is_loaded() || k->is_instance_klass(), "Must be for instance");
4188 // Either const_oop() is null or else ptr is Constant
4189 assert( (!o && ptr != Constant) || (o && ptr == Constant),
4190 "constant pointers must have a value supplied" );
4191 // Ptr is never Null
4192 assert( ptr != Null, "null pointers are not typed" );
4193
4194 assert(instance_id <= 0 || xk, "instances are always exactly typed");
4195 if (ptr == Constant) {
4196 // Note: This case includes meta-object constants, such as methods.
4197 xk = true;
4198 } else if (k->is_loaded()) {
4199 ciInstanceKlass* ik = k->as_instance_klass();
4200 if (!xk && ik->is_final()) xk = true; // no inexact final klass
4201 assert(!ik->is_interface(), "no interface here");
4202 if (xk && ik->is_interface()) xk = false; // no exact interface
4203 }
4204
4205 // Check if this type is known to be flat in arrays
4206 flat_in_array = flat_in_array || k->flat_in_array();
4207
4208 // Now hash this baby
4209 TypeInstPtr *result =
4210 (TypeInstPtr*)(new TypeInstPtr(ptr, k, interfaces, xk, o, offset, flat_in_array, instance_id, speculative, inline_depth))->hashcons();
4211
4212 return result;
4213 }
4214
4215 const TypeInterfaces* TypePtr::interfaces(ciKlass*& k, bool klass, bool interface, bool array, InterfaceHandling interface_handling) {
4216 if (k->is_instance_klass()) {
4217 if (k->is_loaded()) {
4218 if (k->is_interface() && interface_handling == ignore_interfaces) {
4219 assert(interface, "no interface expected");
4220 k = ciEnv::current()->Object_klass();
4221 const TypeInterfaces* interfaces = TypeInterfaces::make();
4222 return interfaces;
4223 }
4224 GrowableArray<ciInstanceKlass *>* k_interfaces = k->as_instance_klass()->transitive_interfaces();
4225 const TypeInterfaces* interfaces = TypeInterfaces::make(k_interfaces);
4226 if (k->is_interface()) {
4227 assert(interface, "no interface expected");
4228 k = ciEnv::current()->Object_klass();
4229 } else {
4230 assert(klass, "no instance klass expected");
4231 }
4232 return interfaces;
4233 }
4234 const TypeInterfaces* interfaces = TypeInterfaces::make();
4235 return interfaces;
4236 }
4237 assert(array, "no array expected");
4238 assert(k->is_array_klass(), "Not an array?");
4239 ciType* e = k->as_array_klass()->base_element_type();
4240 if (e->is_loaded() && e->is_instance_klass() && e->as_instance_klass()->is_interface()) {
4241 if (interface_handling == ignore_interfaces) {
4242 k = ciObjArrayKlass::make(ciEnv::current()->Object_klass(), k->as_array_klass()->dimension());
4243 }
4244 }
4245 return TypeAryPtr::_array_interfaces;
4246 }
4247
4248 /**
4249 * Create constant type for a constant boxed value
4250 */
4251 const Type* TypeInstPtr::get_const_boxed_value() const {
4252 assert(is_ptr_to_boxed_value(), "should be called only for boxed value");
4253 assert((const_oop() != nullptr), "should be called only for constant object");
4254 ciConstant constant = const_oop()->as_instance()->field_value_by_offset(offset());
4255 BasicType bt = constant.basic_type();
4256 switch (bt) {
4257 case T_BOOLEAN: return TypeInt::make(constant.as_boolean());
4258 case T_INT: return TypeInt::make(constant.as_int());
4259 case T_CHAR: return TypeInt::make(constant.as_char());
4260 case T_BYTE: return TypeInt::make(constant.as_byte());
4261 case T_SHORT: return TypeInt::make(constant.as_short());
4262 case T_FLOAT: return TypeF::make(constant.as_float());
4263 case T_DOUBLE: return TypeD::make(constant.as_double());
4264 case T_LONG: return TypeLong::make(constant.as_long());
4265 default: break;
4266 }
4267 fatal("Invalid boxed value type '%s'", type2name(bt));
4268 return nullptr;
4269 }
4270
4271 //------------------------------cast_to_ptr_type-------------------------------
4272 const TypeInstPtr* TypeInstPtr::cast_to_ptr_type(PTR ptr) const {
4273 if( ptr == _ptr ) return this;
4274 // Reconstruct _sig info here since not a problem with later lazy
4275 // construction, _sig will show up on demand.
4276 return make(ptr, klass(), _interfaces, klass_is_exact(), ptr == Constant ? const_oop() : nullptr, _offset, _flat_in_array, _instance_id, _speculative, _inline_depth);
4277 }
4278
4279
4280 //-----------------------------cast_to_exactness-------------------------------
4281 const TypeInstPtr* TypeInstPtr::cast_to_exactness(bool klass_is_exact) const {
4282 if( klass_is_exact == _klass_is_exact ) return this;
4283 if (!_klass->is_loaded()) return this;
4284 ciInstanceKlass* ik = _klass->as_instance_klass();
4285 if( (ik->is_final() || _const_oop) ) return this; // cannot clear xk
4286 assert(!ik->is_interface(), "no interface here");
4287 return make(ptr(), klass(), _interfaces, klass_is_exact, const_oop(), _offset, _flat_in_array, _instance_id, _speculative, _inline_depth);
4288 }
4289
4290 //-----------------------------cast_to_instance_id----------------------------
4291 const TypeInstPtr* TypeInstPtr::cast_to_instance_id(int instance_id) const {
4292 if( instance_id == _instance_id ) return this;
4293 return make(_ptr, klass(), _interfaces, _klass_is_exact, const_oop(), _offset, _flat_in_array, instance_id, _speculative, _inline_depth);
4294 }
4295
4296 //------------------------------xmeet_unloaded---------------------------------
4297 // Compute the MEET of two InstPtrs when at least one is unloaded.
4298 // Assume classes are different since called after check for same name/class-loader
4299 const TypeInstPtr *TypeInstPtr::xmeet_unloaded(const TypeInstPtr *tinst, const TypeInterfaces* interfaces) const {
4300 Offset off = meet_offset(tinst->offset());
4301 PTR ptr = meet_ptr(tinst->ptr());
4302 int instance_id = meet_instance_id(tinst->instance_id());
4303 const TypePtr* speculative = xmeet_speculative(tinst);
4304 int depth = meet_inline_depth(tinst->inline_depth());
4305
4306 const TypeInstPtr *loaded = is_loaded() ? this : tinst;
4307 const TypeInstPtr *unloaded = is_loaded() ? tinst : this;
4308 if( loaded->klass()->equals(ciEnv::current()->Object_klass()) ) {
4309 //
4310 // Meet unloaded class with java/lang/Object
4311 //
4312 // Meet
4313 // | Unloaded Class
4314 // Object | TOP | AnyNull | Constant | NotNull | BOTTOM |
4315 // ===================================================================
4316 // TOP | ..........................Unloaded......................|
4317 // AnyNull | U-AN |................Unloaded......................|
4318 // Constant | ... O-NN .................................. | O-BOT |
4319 // NotNull | ... O-NN .................................. | O-BOT |
4320 // BOTTOM | ........................Object-BOTTOM ..................|
4321 //
4322 assert(loaded->ptr() != TypePtr::Null, "insanity check");
4323 //
4324 if (loaded->ptr() == TypePtr::TopPTR) { return unloaded->with_speculative(speculative); }
4325 else if (loaded->ptr() == TypePtr::AnyNull) { return make(ptr, unloaded->klass(), interfaces, false, nullptr, off, false, instance_id, speculative, depth); }
4326 else if (loaded->ptr() == TypePtr::BotPTR) { return TypeInstPtr::BOTTOM->with_speculative(speculative); }
4327 else if (loaded->ptr() == TypePtr::Constant || loaded->ptr() == TypePtr::NotNull) {
4328 if (unloaded->ptr() == TypePtr::BotPTR) { return TypeInstPtr::BOTTOM->with_speculative(speculative); }
4329 else { return TypeInstPtr::NOTNULL->with_speculative(speculative); }
4330 }
4331 else if (unloaded->ptr() == TypePtr::TopPTR) { return unloaded->with_speculative(speculative); }
4332
4333 return unloaded->cast_to_ptr_type(TypePtr::AnyNull)->is_instptr()->with_speculative(speculative);
4334 }
4335
4336 // Both are unloaded, not the same class, not Object
4337 // Or meet unloaded with a different loaded class, not java/lang/Object
4338 if (ptr != TypePtr::BotPTR) {
4339 return TypeInstPtr::NOTNULL->with_speculative(speculative);
4340 }
4341 return TypeInstPtr::BOTTOM->with_speculative(speculative);
4342 }
4343
4344
4345 //------------------------------meet-------------------------------------------
4346 // Compute the MEET of two types. It returns a new Type object.
4347 const Type *TypeInstPtr::xmeet_helper(const Type *t) const {
4348 // Perform a fast test for common case; meeting the same types together.
4349 if( this == t ) return this; // Meeting same type-rep?
4350
4351 // Current "this->_base" is Pointer
4352 switch (t->base()) { // switch on original type
4353
4354 case Int: // Mixing ints & oops happens when javac
4355 case Long: // reuses local variables
4356 case FloatTop:
4357 case FloatCon:
4358 case FloatBot:
4359 case DoubleTop:
4360 case DoubleCon:
4361 case DoubleBot:
4362 case NarrowOop:
4363 case NarrowKlass:
4364 case Bottom: // Ye Olde Default
4365 return Type::BOTTOM;
4366 case Top:
4367 return this;
4368
4369 default: // All else is a mistake
4370 typerr(t);
4371
4372 case MetadataPtr:
4373 case KlassPtr:
4374 case InstKlassPtr:
4375 case AryKlassPtr:
4376 case RawPtr: return TypePtr::BOTTOM;
4377
4378 case AryPtr: { // All arrays inherit from Object class
4379 // Call in reverse direction to avoid duplication
4380 return t->is_aryptr()->xmeet_helper(this);
4381 }
4382
4383 case OopPtr: { // Meeting to OopPtrs
4384 // Found a OopPtr type vs self-InstPtr type
4385 const TypeOopPtr *tp = t->is_oopptr();
4386 Offset offset = meet_offset(tp->offset());
4387 PTR ptr = meet_ptr(tp->ptr());
4388 switch (tp->ptr()) {
4389 case TopPTR:
4390 case AnyNull: {
4391 int instance_id = meet_instance_id(InstanceTop);
4392 const TypePtr* speculative = xmeet_speculative(tp);
4393 int depth = meet_inline_depth(tp->inline_depth());
4394 return make(ptr, klass(), _interfaces, klass_is_exact(),
4395 (ptr == Constant ? const_oop() : nullptr), offset, flat_in_array(), instance_id, speculative, depth);
4396 }
4397 case NotNull:
4398 case BotPTR: {
4399 int instance_id = meet_instance_id(tp->instance_id());
4400 const TypePtr* speculative = xmeet_speculative(tp);
4401 int depth = meet_inline_depth(tp->inline_depth());
4402 return TypeOopPtr::make(ptr, offset, instance_id, speculative, depth);
4403 }
4404 default: typerr(t);
4405 }
4406 }
4407
4408 case AnyPtr: { // Meeting to AnyPtrs
4409 // Found an AnyPtr type vs self-InstPtr type
4410 const TypePtr *tp = t->is_ptr();
4411 Offset offset = meet_offset(tp->offset());
4412 PTR ptr = meet_ptr(tp->ptr());
4413 int instance_id = meet_instance_id(InstanceTop);
4414 const TypePtr* speculative = xmeet_speculative(tp);
4415 int depth = meet_inline_depth(tp->inline_depth());
4416 switch (tp->ptr()) {
4417 case Null:
4418 if( ptr == Null ) return TypePtr::make(AnyPtr, ptr, offset, speculative, depth);
4419 // else fall through to AnyNull
4420 case TopPTR:
4421 case AnyNull: {
4422 return make(ptr, klass(), _interfaces, klass_is_exact(),
4423 (ptr == Constant ? const_oop() : nullptr), offset, flat_in_array(), instance_id, speculative, depth);
4424 }
4425 case NotNull:
4426 case BotPTR:
4427 return TypePtr::make(AnyPtr, ptr, offset, speculative,depth);
4428 default: typerr(t);
4429 }
4430 }
4431
4432 /*
4433 A-top }
4434 / | \ } Tops
4435 B-top A-any C-top }
4436 | / | \ | } Any-nulls
4437 B-any | C-any }
4438 | | |
4439 B-con A-con C-con } constants; not comparable across classes
4440 | | |
4441 B-not | C-not }
4442 | \ | / | } not-nulls
4443 B-bot A-not C-bot }
4444 \ | / } Bottoms
4445 A-bot }
4446 */
4447
4448 case InstPtr: { // Meeting 2 Oops?
4449 // Found an InstPtr sub-type vs self-InstPtr type
4450 const TypeInstPtr *tinst = t->is_instptr();
4451 Offset off = meet_offset(tinst->offset());
4452 PTR ptr = meet_ptr(tinst->ptr());
4453 int instance_id = meet_instance_id(tinst->instance_id());
4454 const TypePtr* speculative = xmeet_speculative(tinst);
4455 int depth = meet_inline_depth(tinst->inline_depth());
4456 const TypeInterfaces* interfaces = meet_interfaces(tinst);
4457
4458 ciKlass* tinst_klass = tinst->klass();
4459 ciKlass* this_klass = klass();
4460
4461 ciKlass* res_klass = nullptr;
4462 bool res_xk = false;
4463 bool res_flat_in_array = false;
4464 const Type* res;
4465 MeetResult kind = meet_instptr(ptr, interfaces, this, tinst, res_klass, res_xk, res_flat_in_array);
4466
4467 if (kind == UNLOADED) {
4468 // One of these classes has not been loaded
4469 const TypeInstPtr* unloaded_meet = xmeet_unloaded(tinst, interfaces);
4470 #ifndef PRODUCT
4471 if (PrintOpto && Verbose) {
4472 tty->print("meet of unloaded classes resulted in: ");
4473 unloaded_meet->dump();
4474 tty->cr();
4475 tty->print(" this == ");
4476 dump();
4477 tty->cr();
4478 tty->print(" tinst == ");
4479 tinst->dump();
4480 tty->cr();
4481 }
4482 #endif
4483 res = unloaded_meet;
4484 } else {
4485 if (kind == NOT_SUBTYPE && instance_id > 0) {
4486 instance_id = InstanceBot;
4487 } else if (kind == LCA) {
4488 instance_id = InstanceBot;
4489 }
4490 ciObject* o = nullptr; // Assume not constant when done
4491 ciObject* this_oop = const_oop();
4492 ciObject* tinst_oop = tinst->const_oop();
4493 if (ptr == Constant) {
4494 if (this_oop != nullptr && tinst_oop != nullptr &&
4495 this_oop->equals(tinst_oop))
4496 o = this_oop;
4497 else if (above_centerline(_ptr)) {
4498 assert(!tinst_klass->is_interface(), "");
4499 o = tinst_oop;
4500 } else if (above_centerline(tinst->_ptr)) {
4501 assert(!this_klass->is_interface(), "");
4502 o = this_oop;
4503 } else
4504 ptr = NotNull;
4505 }
4506 res = make(ptr, res_klass, interfaces, res_xk, o, off, res_flat_in_array, instance_id, speculative, depth);
4507 }
4508
4509 return res;
4510
4511 } // End of case InstPtr
4512
4513 } // End of switch
4514 return this; // Return the double constant
4515 }
4516
4517 template<class T> TypePtr::MeetResult TypePtr::meet_instptr(PTR& ptr, const TypeInterfaces*& interfaces, const T* this_type, const T* other_type,
4518 ciKlass*& res_klass, bool& res_xk, bool& res_flat_in_array) {
4519 ciKlass* this_klass = this_type->klass();
4520 ciKlass* other_klass = other_type->klass();
4521 const bool this_flat_in_array = this_type->flat_in_array();
4522 const bool other_flat_in_array = other_type->flat_in_array();
4523 const bool this_not_flat_in_array = this_type->not_flat_in_array();
4524 const bool other_not_flat_in_array = other_type->not_flat_in_array();
4525
4526 bool this_xk = this_type->klass_is_exact();
4527 bool other_xk = other_type->klass_is_exact();
4528 PTR this_ptr = this_type->ptr();
4529 PTR other_ptr = other_type->ptr();
4530 const TypeInterfaces* this_interfaces = this_type->interfaces();
4531 const TypeInterfaces* other_interfaces = other_type->interfaces();
4532 // Check for easy case; klasses are equal (and perhaps not loaded!)
4533 // If we have constants, then we created oops so classes are loaded
4534 // and we can handle the constants further down. This case handles
4535 // both-not-loaded or both-loaded classes
4536 if (ptr != Constant && this_klass->equals(other_klass) && this_xk == other_xk && this_flat_in_array == other_flat_in_array) {
4537 res_klass = this_klass;
4538 res_xk = this_xk;
4539 res_flat_in_array = this_flat_in_array;
4540 return QUICK;
4541 }
4542
4543 // Classes require inspection in the Java klass hierarchy. Must be loaded.
4544 if (!other_klass->is_loaded() || !this_klass->is_loaded()) {
4545 return UNLOADED;
4546 }
4547
4548 // !!! Here's how the symmetry requirement breaks down into invariants:
4549 // If we split one up & one down AND they subtype, take the down man.
4550 // If we split one up & one down AND they do NOT subtype, "fall hard".
4551 // If both are up and they subtype, take the subtype class.
4552 // If both are up and they do NOT subtype, "fall hard".
4553 // If both are down and they subtype, take the supertype class.
4554 // If both are down and they do NOT subtype, "fall hard".
4555 // Constants treated as down.
4556
4557 // Now, reorder the above list; observe that both-down+subtype is also
4558 // "fall hard"; "fall hard" becomes the default case:
4559 // If we split one up & one down AND they subtype, take the down man.
4560 // If both are up and they subtype, take the subtype class.
4561
4562 // If both are down and they subtype, "fall hard".
4563 // If both are down and they do NOT subtype, "fall hard".
4564 // If both are up and they do NOT subtype, "fall hard".
4565 // If we split one up & one down AND they do NOT subtype, "fall hard".
4566
4567 // If a proper subtype is exact, and we return it, we return it exactly.
4568 // If a proper supertype is exact, there can be no subtyping relationship!
4569 // If both types are equal to the subtype, exactness is and-ed below the
4570 // centerline and or-ed above it. (N.B. Constants are always exact.)
4571
4572 // Check for subtyping:
4573 // Flat in array matrix, yes = y, no = n, maybe = m, top/empty = T:
4574 // yes maybe no -> Super Klass
4575 // yes y y y
4576 // maybe y m m
4577 // no T n n
4578 // |
4579 // v
4580 // Sub Klass
4581
4582 const T* subtype = nullptr;
4583 bool subtype_exact = false;
4584 bool flat_in_array = false;
4585 if (this_type->is_same_java_type_as(other_type)) {
4586 subtype = this_type;
4587 subtype_exact = below_centerline(ptr) ? (this_xk && other_xk) : (this_xk || other_xk);
4588 flat_in_array = below_centerline(ptr) ? (this_flat_in_array && other_flat_in_array) : (this_flat_in_array || other_flat_in_array);
4589 } else if (!other_xk && is_meet_subtype_of(this_type, other_type)) {
4590 subtype = this_type; // Pick subtyping class
4591 subtype_exact = this_xk;
4592 bool other_flat_this_maybe_flat = other_flat_in_array && (!this_flat_in_array && !this_not_flat_in_array);
4593 flat_in_array = this_flat_in_array || other_flat_this_maybe_flat;
4594 } else if (!this_xk && is_meet_subtype_of(other_type, this_type)) {
4595 subtype = other_type; // Pick subtyping class
4596 subtype_exact = other_xk;
4597 bool this_flat_other_maybe_flat = this_flat_in_array && (!other_flat_in_array && !other_not_flat_in_array);
4598 flat_in_array = other_flat_in_array || this_flat_other_maybe_flat;
4599 }
4600
4601 if (subtype) {
4602 if (above_centerline(ptr)) {
4603 // Both types are empty.
4604 this_type = other_type = subtype;
4605 this_xk = other_xk = subtype_exact;
4606 } else if (above_centerline(this_ptr) && !above_centerline(other_ptr)) {
4607 // this_type is empty while other_type is not. Take other_type.
4608 this_type = other_type;
4609 this_xk = other_xk;
4610 flat_in_array = other_flat_in_array;
4611 } else if (above_centerline(other_ptr) && !above_centerline(this_ptr)) {
4612 // other_type is empty while this_type is not. Take this_type.
4613 other_type = this_type; // this is down; keep down man
4614 flat_in_array = this_flat_in_array;
4615 } else {
4616 // this_type and other_type are both non-empty.
4617 this_xk = subtype_exact; // either they are equal, or we'll do an LCA
4618 }
4619 }
4620
4621 // Check for classes now being equal
4622 if (this_type->is_same_java_type_as(other_type)) {
4623 // If the klasses are equal, the constants may still differ. Fall to
4624 // NotNull if they do (neither constant is null; that is a special case
4625 // handled elsewhere).
4626 res_klass = this_type->klass();
4627 res_xk = this_xk;
4628 res_flat_in_array = subtype ? flat_in_array : this_flat_in_array;
4629 return SUBTYPE;
4630 } // Else classes are not equal
4631
4632 // Since klasses are different, we require a LCA in the Java
4633 // class hierarchy - which means we have to fall to at least NotNull.
4634 if (ptr == TopPTR || ptr == AnyNull || ptr == Constant) {
4635 ptr = NotNull;
4636 }
4637
4638 interfaces = this_interfaces->intersection_with(other_interfaces);
4639
4640 // Now we find the LCA of Java classes
4641 ciKlass* k = this_klass->least_common_ancestor(other_klass);
4642
4643 res_klass = k;
4644 res_xk = false;
4645 res_flat_in_array = this_flat_in_array && other_flat_in_array;
4646
4647 return LCA;
4648 }
4649
4650 template<class T> bool TypePtr::is_meet_subtype_of(const T* sub_type, const T* super_type) {
4651 return sub_type->is_meet_subtype_of(super_type) && !(super_type->flat_in_array() && sub_type->not_flat_in_array());
4652 }
4653
4654 //------------------------java_mirror_type--------------------------------------
4655 ciType* TypeInstPtr::java_mirror_type(bool* is_null_free_array) const {
4656 // must be a singleton type
4657 if( const_oop() == nullptr ) return nullptr;
4658
4659 // must be of type java.lang.Class
4660 if( klass() != ciEnv::current()->Class_klass() ) return nullptr;
4661 return const_oop()->as_instance()->java_mirror_type(is_null_free_array);
4662 }
4663
4664
4665 //------------------------------xdual------------------------------------------
4666 // Dual: do NOT dual on klasses. This means I do NOT understand the Java
4667 // inheritance mechanism.
4668 const Type *TypeInstPtr::xdual() const {
4669 return new TypeInstPtr(dual_ptr(), klass(), _interfaces, klass_is_exact(), const_oop(), dual_offset(), flat_in_array(), dual_instance_id(), dual_speculative(), dual_inline_depth());
4670 }
4671
4672 //------------------------------eq---------------------------------------------
4673 // Structural equality check for Type representations
4674 bool TypeInstPtr::eq( const Type *t ) const {
4675 const TypeInstPtr *p = t->is_instptr();
4676 return
4677 klass()->equals(p->klass()) &&
4678 flat_in_array() == p->flat_in_array() &&
4679 _interfaces->eq(p->_interfaces) &&
4680 TypeOopPtr::eq(p); // Check sub-type stuff
4681 }
4682
4683 //------------------------------hash-------------------------------------------
4684 // Type-specific hashing function.
4685 uint TypeInstPtr::hash(void) const {
4686 return klass()->hash() + TypeOopPtr::hash() + _interfaces->hash() + (uint)flat_in_array();
4687 }
4688
4689 bool TypeInstPtr::is_java_subtype_of_helper(const TypeOopPtr* other, bool this_exact, bool other_exact) const {
4690 return TypePtr::is_java_subtype_of_helper_for_instance(this, other, this_exact, other_exact);
4691 }
4692
4693
4694 bool TypeInstPtr::is_same_java_type_as_helper(const TypeOopPtr* other) const {
4695 return TypePtr::is_same_java_type_as_helper_for_instance(this, other);
4696 }
4697
4698 bool TypeInstPtr::maybe_java_subtype_of_helper(const TypeOopPtr* other, bool this_exact, bool other_exact) const {
4699 return TypePtr::maybe_java_subtype_of_helper_for_instance(this, other, this_exact, other_exact);
4700 }
4701
4702
4703 //------------------------------dump2------------------------------------------
4704 // Dump oop Type
4705 #ifndef PRODUCT
4706 void TypeInstPtr::dump2(Dict &d, uint depth, outputStream* st) const {
4707 // Print the name of the klass.
4708 klass()->print_name_on(st);
4709 _interfaces->dump(st);
4710
4711 switch( _ptr ) {
4712 case Constant:
4713 if (WizardMode || Verbose) {
4714 ResourceMark rm;
4715 stringStream ss;
4716
4717 st->print(" ");
4718 const_oop()->print_oop(&ss);
4719 // 'const_oop->print_oop()' may emit newlines('\n') into ss.
4720 // suppress newlines from it so -XX:+Verbose -XX:+PrintIdeal dumps one-liner for each node.
4721 char* buf = ss.as_string(/* c_heap= */false);
4722 StringUtils::replace_no_expand(buf, "\n", "");
4723 st->print_raw(buf);
4724 }
4725 case BotPTR:
4726 if (!WizardMode && !Verbose) {
4727 if( _klass_is_exact ) st->print(":exact");
4728 break;
4729 }
4730 case TopPTR:
4731 case AnyNull:
4732 case NotNull:
4733 st->print(":%s", ptr_msg[_ptr]);
4734 if( _klass_is_exact ) st->print(":exact");
4735 break;
4736 default:
4737 break;
4738 }
4739
4740 _offset.dump2(st);
4741
4742 st->print(" *");
4743
4744 if (flat_in_array() && !klass()->is_inlinetype()) {
4745 st->print(" (flat in array)");
4746 }
4747
4748 if (_instance_id == InstanceTop)
4749 st->print(",iid=top");
4750 else if (_instance_id != InstanceBot)
4751 st->print(",iid=%d",_instance_id);
4752
4753 dump_inline_depth(st);
4754 dump_speculative(st);
4755 }
4756 #endif
4757
4758 //------------------------------add_offset-------------------------------------
4759 const TypePtr* TypeInstPtr::add_offset(intptr_t offset) const {
4760 return make(_ptr, klass(), _interfaces, klass_is_exact(), const_oop(), xadd_offset(offset), flat_in_array(),
4761 _instance_id, add_offset_speculative(offset), _inline_depth);
4762 }
4763
4764 const TypeInstPtr* TypeInstPtr::with_offset(intptr_t offset) const {
4765 return make(_ptr, klass(), _interfaces, klass_is_exact(), const_oop(), Offset(offset), flat_in_array(),
4766 _instance_id, with_offset_speculative(offset), _inline_depth);
4767 }
4768
4769 const TypeInstPtr* TypeInstPtr::remove_speculative() const {
4770 if (_speculative == nullptr) {
4771 return this;
4772 }
4773 assert(_inline_depth == InlineDepthTop || _inline_depth == InlineDepthBottom, "non speculative type shouldn't have inline depth");
4774 return make(_ptr, klass(), _interfaces, klass_is_exact(), const_oop(), _offset, flat_in_array(),
4775 _instance_id, nullptr, _inline_depth);
4776 }
4777
4778 const TypeInstPtr* TypeInstPtr::with_speculative(const TypePtr* speculative) const {
4779 return make(_ptr, klass(), _interfaces, klass_is_exact(), const_oop(), _offset, flat_in_array(), _instance_id, speculative, _inline_depth);
4780 }
4781
4782 const TypePtr* TypeInstPtr::with_inline_depth(int depth) const {
4783 if (!UseInlineDepthForSpeculativeTypes) {
4784 return this;
4785 }
4786 return make(_ptr, klass(), _interfaces, klass_is_exact(), const_oop(), _offset, flat_in_array(), _instance_id, _speculative, depth);
4787 }
4788
4789 const TypePtr* TypeInstPtr::with_instance_id(int instance_id) const {
4790 assert(is_known_instance(), "should be known");
4791 return make(_ptr, klass(), _interfaces, klass_is_exact(), const_oop(), _offset, flat_in_array(), instance_id, _speculative, _inline_depth);
4792 }
4793
4794 const TypeInstPtr *TypeInstPtr::cast_to_flat_in_array() const {
4795 return make(_ptr, klass(), _interfaces, klass_is_exact(), const_oop(), _offset, true, _instance_id, _speculative, _inline_depth);
4796 }
4797
4798 const TypeKlassPtr* TypeInstPtr::as_klass_type(bool try_for_exact) const {
4799 bool xk = klass_is_exact();
4800 ciInstanceKlass* ik = klass()->as_instance_klass();
4801 if (try_for_exact && !xk && !ik->has_subklass() && !ik->is_final()) {
4802 if (_interfaces->eq(ik)) {
4803 Compile* C = Compile::current();
4804 Dependencies* deps = C->dependencies();
4805 deps->assert_leaf_type(ik);
4806 xk = true;
4807 }
4808 }
4809 return TypeInstKlassPtr::make(xk ? TypePtr::Constant : TypePtr::NotNull, klass(), _interfaces, Offset(0), flat_in_array());
4810 }
4811
4812 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) {
4813 static_assert(std::is_base_of<T2, T1>::value, "");
4814
4815 if (!this_one->is_instance_type(other)) {
4816 return false;
4817 }
4818
4819 if (other->klass() == ciEnv::current()->Object_klass() && other->_interfaces->empty()) {
4820 return true;
4821 }
4822
4823 return this_one->klass()->is_subtype_of(other->klass()) &&
4824 (!this_xk || this_one->_interfaces->contains(other->_interfaces));
4825 }
4826
4827
4828 bool TypeInstPtr::is_meet_subtype_of_helper(const TypeOopPtr *other, bool this_xk, bool other_xk) const {
4829 return TypePtr::is_meet_subtype_of_helper_for_instance(this, other, this_xk, other_xk);
4830 }
4831
4832 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) {
4833 static_assert(std::is_base_of<T2, T1>::value, "");
4834 if (other->klass() == ciEnv::current()->Object_klass() && other->_interfaces->empty()) {
4835 return true;
4836 }
4837
4838 if (this_one->is_instance_type(other)) {
4839 return other->klass() == ciEnv::current()->Object_klass() && this_one->_interfaces->contains(other->_interfaces);
4840 }
4841
4842 int dummy;
4843 bool this_top_or_bottom = (this_one->base_element_type(dummy) == Type::TOP || this_one->base_element_type(dummy) == Type::BOTTOM);
4844 if (this_top_or_bottom) {
4845 return false;
4846 }
4847
4848 const T1* other_ary = this_one->is_array_type(other);
4849 const TypePtr* other_elem = other_ary->elem()->make_ptr();
4850 const TypePtr* this_elem = this_one->elem()->make_ptr();
4851 if (other_elem != nullptr && this_elem != nullptr) {
4852 return this_one->is_reference_type(this_elem)->is_meet_subtype_of_helper(this_one->is_reference_type(other_elem), this_xk, other_xk);
4853 }
4854 if (other_elem == nullptr && this_elem == nullptr) {
4855 return this_one->klass()->is_subtype_of(other->klass());
4856 }
4857
4858 return false;
4859 }
4860
4861 bool TypeAryPtr::is_meet_subtype_of_helper(const TypeOopPtr *other, bool this_xk, bool other_xk) const {
4862 return TypePtr::is_meet_subtype_of_helper_for_array(this, other, this_xk, other_xk);
4863 }
4864
4865 bool TypeInstKlassPtr::is_meet_subtype_of_helper(const TypeKlassPtr *other, bool this_xk, bool other_xk) const {
4866 return TypePtr::is_meet_subtype_of_helper_for_instance(this, other, this_xk, other_xk);
4867 }
4868
4869 bool TypeAryKlassPtr::is_meet_subtype_of_helper(const TypeKlassPtr *other, bool this_xk, bool other_xk) const {
4870 return TypePtr::is_meet_subtype_of_helper_for_array(this, other, this_xk, other_xk);
4871 }
4872
4873 //=============================================================================
4874 // Convenience common pre-built types.
4875 const TypeAryPtr *TypeAryPtr::RANGE;
4876 const TypeAryPtr *TypeAryPtr::OOPS;
4877 const TypeAryPtr *TypeAryPtr::NARROWOOPS;
4878 const TypeAryPtr *TypeAryPtr::BYTES;
4879 const TypeAryPtr *TypeAryPtr::SHORTS;
4880 const TypeAryPtr *TypeAryPtr::CHARS;
4881 const TypeAryPtr *TypeAryPtr::INTS;
4882 const TypeAryPtr *TypeAryPtr::LONGS;
4883 const TypeAryPtr *TypeAryPtr::FLOATS;
4884 const TypeAryPtr *TypeAryPtr::DOUBLES;
4885 const TypeAryPtr *TypeAryPtr::INLINES;
4886
4887 //------------------------------make-------------------------------------------
4888 const TypeAryPtr* TypeAryPtr::make(PTR ptr, const TypeAry *ary, ciKlass* k, bool xk, Offset offset, Offset field_offset,
4889 int instance_id, const TypePtr* speculative, int inline_depth) {
4890 assert(!(k == nullptr && ary->_elem->isa_int()),
4891 "integral arrays must be pre-equipped with a class");
4892 if (!xk) xk = ary->ary_must_be_exact();
4893 assert(instance_id <= 0 || xk, "instances are always exactly typed");
4894 if (k != nullptr && k->is_loaded() && k->is_obj_array_klass() &&
4895 k->as_obj_array_klass()->base_element_klass()->is_interface()) {
4896 k = nullptr;
4897 }
4898 if (k != nullptr && k->is_flat_array_klass() && !ary->_flat) {
4899 k = nullptr;
4900 }
4901 return (TypeAryPtr*)(new TypeAryPtr(ptr, nullptr, ary, k, xk, offset, field_offset, instance_id, false, speculative, inline_depth))->hashcons();
4902 }
4903
4904 //------------------------------make-------------------------------------------
4905 const TypeAryPtr* TypeAryPtr::make(PTR ptr, ciObject* o, const TypeAry *ary, ciKlass* k, bool xk, Offset offset, Offset field_offset,
4906 int instance_id, const TypePtr* speculative, int inline_depth,
4907 bool is_autobox_cache) {
4908 assert(!(k == nullptr && ary->_elem->isa_int()),
4909 "integral arrays must be pre-equipped with a class");
4910 assert( (ptr==Constant && o) || (ptr!=Constant && !o), "" );
4911 if (!xk) xk = (o != nullptr) || ary->ary_must_be_exact();
4912 assert(instance_id <= 0 || xk, "instances are always exactly typed");
4913 if (k != nullptr && k->is_loaded() && k->is_obj_array_klass() &&
4914 k->as_obj_array_klass()->base_element_klass()->is_interface()) {
4915 k = nullptr;
4916 }
4917 if (k != nullptr && k->is_flat_array_klass() && !ary->_flat) {
4918 k = nullptr;
4919 }
4920 return (TypeAryPtr*)(new TypeAryPtr(ptr, o, ary, k, xk, offset, field_offset, instance_id, is_autobox_cache, speculative, inline_depth))->hashcons();
4921 }
4922
4923 //------------------------------cast_to_ptr_type-------------------------------
4924 const TypeAryPtr* TypeAryPtr::cast_to_ptr_type(PTR ptr) const {
4925 if( ptr == _ptr ) return this;
4926 return make(ptr, ptr == Constant ? const_oop() : nullptr, _ary, klass(), klass_is_exact(), _offset, _field_offset, _instance_id, _speculative, _inline_depth, _is_autobox_cache);
4927 }
4928
4929
4930 //-----------------------------cast_to_exactness-------------------------------
4931 const TypeAryPtr* TypeAryPtr::cast_to_exactness(bool klass_is_exact) const {
4932 if( klass_is_exact == _klass_is_exact ) return this;
4933 if (_ary->ary_must_be_exact()) return this; // cannot clear xk
4934 return make(ptr(), const_oop(), _ary, klass(), klass_is_exact, _offset, _field_offset, _instance_id, _speculative, _inline_depth, _is_autobox_cache);
4935 }
4936
4937 //-----------------------------cast_to_instance_id----------------------------
4938 const TypeAryPtr* TypeAryPtr::cast_to_instance_id(int instance_id) const {
4939 if( instance_id == _instance_id ) return this;
4940 return make(_ptr, const_oop(), _ary, klass(), _klass_is_exact, _offset, _field_offset, instance_id, _speculative, _inline_depth, _is_autobox_cache);
4941 }
4942
4943
4944 //-----------------------------max_array_length-------------------------------
4945 // A wrapper around arrayOopDesc::max_array_length(etype) with some input normalization.
4946 jint TypeAryPtr::max_array_length(BasicType etype) {
4947 if (!is_java_primitive(etype) && !::is_reference_type(etype)) {
4948 if (etype == T_NARROWOOP) {
4949 etype = T_OBJECT;
4950 } else if (etype == T_ILLEGAL) { // bottom[]
4951 etype = T_BYTE; // will produce conservatively high value
4952 } else {
4953 fatal("not an element type: %s", type2name(etype));
4954 }
4955 }
4956 return arrayOopDesc::max_array_length(etype);
4957 }
4958
4959 //-----------------------------narrow_size_type-------------------------------
4960 // Narrow the given size type to the index range for the given array base type.
4961 // Return null if the resulting int type becomes empty.
4962 const TypeInt* TypeAryPtr::narrow_size_type(const TypeInt* size) const {
4963 jint hi = size->_hi;
4964 jint lo = size->_lo;
4965 jint min_lo = 0;
4966 jint max_hi = max_array_length(elem()->array_element_basic_type());
4967 //if (index_not_size) --max_hi; // type of a valid array index, FTR
4968 bool chg = false;
4969 if (lo < min_lo) {
4970 lo = min_lo;
4971 if (size->is_con()) {
4972 hi = lo;
4973 }
4974 chg = true;
4975 }
4976 if (hi > max_hi) {
4977 hi = max_hi;
4978 if (size->is_con()) {
4979 lo = hi;
4980 }
4981 chg = true;
4982 }
4983 // Negative length arrays will produce weird intermediate dead fast-path code
4984 if (lo > hi)
4985 return TypeInt::ZERO;
4986 if (!chg)
4987 return size;
4988 return TypeInt::make(lo, hi, Type::WidenMin);
4989 }
4990
4991 //-------------------------------cast_to_size----------------------------------
4992 const TypeAryPtr* TypeAryPtr::cast_to_size(const TypeInt* new_size) const {
4993 assert(new_size != nullptr, "");
4994 new_size = narrow_size_type(new_size);
4995 if (new_size == size()) return this;
4996 const TypeAry* new_ary = TypeAry::make(elem(), new_size, is_stable(), is_flat(), is_not_flat(), is_not_null_free());
4997 return make(ptr(), const_oop(), new_ary, klass(), klass_is_exact(), _offset, _field_offset, _instance_id, _speculative, _inline_depth, _is_autobox_cache);
4998 }
4999
5000 //-------------------------------cast_to_not_flat------------------------------
5001 const TypeAryPtr* TypeAryPtr::cast_to_not_flat(bool not_flat) const {
5002 if (not_flat == is_not_flat()) {
5003 return this;
5004 }
5005 assert(!not_flat || !is_flat(), "inconsistency");
5006 const TypeAry* new_ary = TypeAry::make(elem(), size(), is_stable(), is_flat(), not_flat, is_not_null_free());
5007 const TypeAryPtr* res = make(ptr(), const_oop(), new_ary, klass(), klass_is_exact(), _offset, _field_offset, _instance_id, _speculative, _inline_depth, _is_autobox_cache);
5008 // We keep the speculative part if it contains information about flat-/nullability.
5009 // Make sure it's removed if it's not better than the non-speculative type anymore.
5010 if (res->speculative() == res->remove_speculative()) {
5011 return res->remove_speculative();
5012 }
5013 return res;
5014 }
5015
5016 //-------------------------------cast_to_not_null_free-------------------------
5017 const TypeAryPtr* TypeAryPtr::cast_to_not_null_free(bool not_null_free) const {
5018 if (not_null_free == is_not_null_free()) {
5019 return this;
5020 }
5021 assert(!not_null_free || !is_flat(), "inconsistency");
5022 const TypeAry* new_ary = TypeAry::make(elem(), size(), is_stable(), is_flat(), /* not_flat= */ not_null_free ? true : is_not_flat(), not_null_free);
5023 const TypeAryPtr* res = make(ptr(), const_oop(), new_ary, klass(), klass_is_exact(), _offset, _field_offset,
5024 _instance_id, _speculative, _inline_depth, _is_autobox_cache);
5025 // We keep the speculative part if it contains information about flat-/nullability.
5026 // Make sure it's removed if it's not better than the non-speculative type anymore.
5027 if (res->speculative() == res->remove_speculative()) {
5028 return res->remove_speculative();
5029 }
5030 return res;
5031 }
5032
5033 //---------------------------------update_properties---------------------------
5034 const TypeAryPtr* TypeAryPtr::update_properties(const TypeAryPtr* from) const {
5035 if ((from->is_flat() && is_not_flat()) ||
5036 (from->is_not_flat() && is_flat()) ||
5037 (from->is_null_free() && is_not_null_free()) ||
5038 (from->is_not_null_free() && is_null_free())) {
5039 return nullptr; // Inconsistent properties
5040 } else if (from->is_not_null_free()) {
5041 return cast_to_not_null_free(); // Implies not flat
5042 } else if (from->is_not_flat()) {
5043 return cast_to_not_flat();
5044 }
5045 return this;
5046 }
5047
5048 jint TypeAryPtr::flat_layout_helper() const {
5049 return klass()->as_flat_array_klass()->layout_helper();
5050 }
5051
5052 int TypeAryPtr::flat_elem_size() const {
5053 return klass()->as_flat_array_klass()->element_byte_size();
5054 }
5055
5056 int TypeAryPtr::flat_log_elem_size() const {
5057 return klass()->as_flat_array_klass()->log2_element_size();
5058 }
5059
5060 //------------------------------cast_to_stable---------------------------------
5061 const TypeAryPtr* TypeAryPtr::cast_to_stable(bool stable, int stable_dimension) const {
5062 if (stable_dimension <= 0 || (stable_dimension == 1 && stable == this->is_stable()))
5063 return this;
5064
5065 const Type* elem = this->elem();
5066 const TypePtr* elem_ptr = elem->make_ptr();
5067
5068 if (stable_dimension > 1 && elem_ptr != nullptr && elem_ptr->isa_aryptr()) {
5069 // If this is widened from a narrow oop, TypeAry::make will re-narrow it.
5070 elem = elem_ptr = elem_ptr->is_aryptr()->cast_to_stable(stable, stable_dimension - 1);
5071 }
5072
5073 const TypeAry* new_ary = TypeAry::make(elem, size(), stable, is_flat(), is_not_flat(), is_not_null_free());
5074
5075 return make(ptr(), const_oop(), new_ary, klass(), klass_is_exact(), _offset, _field_offset, _instance_id, _speculative, _inline_depth, _is_autobox_cache);
5076 }
5077
5078 //-----------------------------stable_dimension--------------------------------
5079 int TypeAryPtr::stable_dimension() const {
5080 if (!is_stable()) return 0;
5081 int dim = 1;
5082 const TypePtr* elem_ptr = elem()->make_ptr();
5083 if (elem_ptr != nullptr && elem_ptr->isa_aryptr())
5084 dim += elem_ptr->is_aryptr()->stable_dimension();
5085 return dim;
5086 }
5087
5088 //----------------------cast_to_autobox_cache-----------------------------------
5089 const TypeAryPtr* TypeAryPtr::cast_to_autobox_cache() const {
5090 if (is_autobox_cache()) return this;
5091 const TypeOopPtr* etype = elem()->make_oopptr();
5092 if (etype == nullptr) return this;
5093 // The pointers in the autobox arrays are always non-null.
5094 etype = etype->cast_to_ptr_type(TypePtr::NotNull)->is_oopptr();
5095 const TypeAry* new_ary = TypeAry::make(etype, size(), is_stable(), is_flat(), is_not_flat(), is_not_null_free());
5096 return make(ptr(), const_oop(), new_ary, klass(), klass_is_exact(), _offset, _field_offset, _instance_id, _speculative, _inline_depth, /*is_autobox_cache=*/true);
5097 }
5098
5099 //------------------------------eq---------------------------------------------
5100 // Structural equality check for Type representations
5101 bool TypeAryPtr::eq( const Type *t ) const {
5102 const TypeAryPtr *p = t->is_aryptr();
5103 return
5104 _ary == p->_ary && // Check array
5105 TypeOopPtr::eq(p) &&// Check sub-parts
5106 _field_offset == p->_field_offset;
5107 }
5108
5109 //------------------------------hash-------------------------------------------
5110 // Type-specific hashing function.
5111 uint TypeAryPtr::hash(void) const {
5112 return (uint)(uintptr_t)_ary + TypeOopPtr::hash() + _field_offset.get();
5113 }
5114
5115 bool TypeAryPtr::is_java_subtype_of_helper(const TypeOopPtr* other, bool this_exact, bool other_exact) const {
5116 return TypePtr::is_java_subtype_of_helper_for_array(this, other, this_exact, other_exact);
5117 }
5118
5119 bool TypeAryPtr::is_same_java_type_as_helper(const TypeOopPtr* other) const {
5120 return TypePtr::is_same_java_type_as_helper_for_array(this, other);
5121 }
5122
5123 bool TypeAryPtr::maybe_java_subtype_of_helper(const TypeOopPtr* other, bool this_exact, bool other_exact) const {
5124 return TypePtr::maybe_java_subtype_of_helper_for_array(this, other, this_exact, other_exact);
5125 }
5126 //------------------------------meet-------------------------------------------
5127 // Compute the MEET of two types. It returns a new Type object.
5128 const Type *TypeAryPtr::xmeet_helper(const Type *t) const {
5129 // Perform a fast test for common case; meeting the same types together.
5130 if( this == t ) return this; // Meeting same type-rep?
5131 // Current "this->_base" is Pointer
5132 switch (t->base()) { // switch on original type
5133
5134 // Mixing ints & oops happens when javac reuses local variables
5135 case Int:
5136 case Long:
5137 case FloatTop:
5138 case FloatCon:
5139 case FloatBot:
5140 case DoubleTop:
5141 case DoubleCon:
5142 case DoubleBot:
5143 case NarrowOop:
5144 case NarrowKlass:
5145 case Bottom: // Ye Olde Default
5146 return Type::BOTTOM;
5147 case Top:
5148 return this;
5149
5150 default: // All else is a mistake
5151 typerr(t);
5152
5153 case OopPtr: { // Meeting to OopPtrs
5154 // Found a OopPtr type vs self-AryPtr type
5155 const TypeOopPtr *tp = t->is_oopptr();
5156 Offset offset = meet_offset(tp->offset());
5157 PTR ptr = meet_ptr(tp->ptr());
5158 int depth = meet_inline_depth(tp->inline_depth());
5159 const TypePtr* speculative = xmeet_speculative(tp);
5160 switch (tp->ptr()) {
5161 case TopPTR:
5162 case AnyNull: {
5163 int instance_id = meet_instance_id(InstanceTop);
5164 return make(ptr, (ptr == Constant ? const_oop() : nullptr),
5165 _ary, _klass, _klass_is_exact, offset, _field_offset, instance_id, speculative, depth);
5166 }
5167 case BotPTR:
5168 case NotNull: {
5169 int instance_id = meet_instance_id(tp->instance_id());
5170 return TypeOopPtr::make(ptr, offset, instance_id, speculative, depth);
5171 }
5172 default: ShouldNotReachHere();
5173 }
5174 }
5175
5176 case AnyPtr: { // Meeting two AnyPtrs
5177 // Found an AnyPtr type vs self-AryPtr type
5178 const TypePtr *tp = t->is_ptr();
5179 Offset offset = meet_offset(tp->offset());
5180 PTR ptr = meet_ptr(tp->ptr());
5181 const TypePtr* speculative = xmeet_speculative(tp);
5182 int depth = meet_inline_depth(tp->inline_depth());
5183 switch (tp->ptr()) {
5184 case TopPTR:
5185 return this;
5186 case BotPTR:
5187 case NotNull:
5188 return TypePtr::make(AnyPtr, ptr, offset, speculative, depth);
5189 case Null:
5190 if( ptr == Null ) return TypePtr::make(AnyPtr, ptr, offset, speculative, depth);
5191 // else fall through to AnyNull
5192 case AnyNull: {
5193 int instance_id = meet_instance_id(InstanceTop);
5194 return make(ptr, (ptr == Constant ? const_oop() : nullptr),
5195 _ary, _klass, _klass_is_exact, offset, _field_offset, instance_id, speculative, depth);
5196 }
5197 default: ShouldNotReachHere();
5198 }
5199 }
5200
5201 case MetadataPtr:
5202 case KlassPtr:
5203 case InstKlassPtr:
5204 case AryKlassPtr:
5205 case RawPtr: return TypePtr::BOTTOM;
5206
5207 case AryPtr: { // Meeting 2 references?
5208 const TypeAryPtr *tap = t->is_aryptr();
5209 Offset off = meet_offset(tap->offset());
5210 Offset field_off = meet_field_offset(tap->field_offset());
5211 const TypeAry *tary = _ary->meet_speculative(tap->_ary)->is_ary();
5212 PTR ptr = meet_ptr(tap->ptr());
5213 int instance_id = meet_instance_id(tap->instance_id());
5214 const TypePtr* speculative = xmeet_speculative(tap);
5215 int depth = meet_inline_depth(tap->inline_depth());
5216
5217 ciKlass* res_klass = nullptr;
5218 bool res_xk = false;
5219 bool res_flat = false;
5220 bool res_not_flat = false;
5221 bool res_not_null_free = false;
5222 const Type* elem = tary->_elem;
5223 if (meet_aryptr(ptr, elem, this, tap, res_klass, res_xk, res_flat, res_not_flat, res_not_null_free) == NOT_SUBTYPE) {
5224 instance_id = InstanceBot;
5225 } else if (this->is_flat() != tap->is_flat()) {
5226 // Meeting flat inline type array with non-flat array. Adjust (field) offset accordingly.
5227 if (tary->_flat) {
5228 // Result is in a flat representation
5229 off = Offset(is_flat() ? offset() : tap->offset());
5230 field_off = is_flat() ? field_offset() : tap->field_offset();
5231 } else if (below_centerline(ptr)) {
5232 // Result is in a non-flat representation
5233 off = Offset(flat_offset()).meet(Offset(tap->flat_offset()));
5234 field_off = (field_off == Offset::top) ? Offset::top : Offset::bottom;
5235 } else if (flat_offset() == tap->flat_offset()) {
5236 off = Offset(!is_flat() ? offset() : tap->offset());
5237 field_off = !is_flat() ? field_offset() : tap->field_offset();
5238 }
5239 }
5240
5241 ciObject* o = nullptr; // Assume not constant when done
5242 ciObject* this_oop = const_oop();
5243 ciObject* tap_oop = tap->const_oop();
5244 if (ptr == Constant) {
5245 if (this_oop != nullptr && tap_oop != nullptr &&
5246 this_oop->equals(tap_oop)) {
5247 o = tap_oop;
5248 } else if (above_centerline(_ptr)) {
5249 o = tap_oop;
5250 } else if (above_centerline(tap->_ptr)) {
5251 o = this_oop;
5252 } else {
5253 ptr = NotNull;
5254 }
5255 }
5256 return make(ptr, o, TypeAry::make(elem, tary->_size, tary->_stable, res_flat, res_not_flat, res_not_null_free), res_klass, res_xk, off, field_off, instance_id, speculative, depth);
5257 }
5258
5259 // All arrays inherit from Object class
5260 case InstPtr: {
5261 const TypeInstPtr *tp = t->is_instptr();
5262 Offset offset = meet_offset(tp->offset());
5263 PTR ptr = meet_ptr(tp->ptr());
5264 int instance_id = meet_instance_id(tp->instance_id());
5265 const TypePtr* speculative = xmeet_speculative(tp);
5266 int depth = meet_inline_depth(tp->inline_depth());
5267 const TypeInterfaces* interfaces = meet_interfaces(tp);
5268 const TypeInterfaces* tp_interfaces = tp->_interfaces;
5269 const TypeInterfaces* this_interfaces = _interfaces;
5270
5271 switch (ptr) {
5272 case TopPTR:
5273 case AnyNull: // Fall 'down' to dual of object klass
5274 // For instances when a subclass meets a superclass we fall
5275 // below the centerline when the superclass is exact. We need to
5276 // do the same here.
5277 if (tp->klass()->equals(ciEnv::current()->Object_klass()) && this_interfaces->contains(tp_interfaces) && !tp->klass_is_exact() && !tp->flat_in_array()) {
5278 return TypeAryPtr::make(ptr, _ary, _klass, _klass_is_exact, offset, _field_offset, instance_id, speculative, depth);
5279 } else {
5280 // cannot subclass, so the meet has to fall badly below the centerline
5281 ptr = NotNull;
5282 instance_id = InstanceBot;
5283 interfaces = this_interfaces->intersection_with(tp_interfaces);
5284 return TypeInstPtr::make(ptr, ciEnv::current()->Object_klass(), interfaces, false, nullptr, offset, false, instance_id, speculative, depth);
5285 }
5286 case Constant:
5287 case NotNull:
5288 case BotPTR: // Fall down to object klass
5289 // LCA is object_klass, but if we subclass from the top we can do better
5290 if (above_centerline(tp->ptr())) {
5291 // If 'tp' is above the centerline and it is Object class
5292 // then we can subclass in the Java class hierarchy.
5293 // For instances when a subclass meets a superclass we fall
5294 // below the centerline when the superclass is exact. We need
5295 // to do the same here.
5296 if (tp->klass()->equals(ciEnv::current()->Object_klass()) && this_interfaces->contains(tp_interfaces) && !tp->klass_is_exact() && !tp->flat_in_array()) {
5297 // that is, my array type is a subtype of 'tp' klass
5298 return make(ptr, (ptr == Constant ? const_oop() : nullptr),
5299 _ary, _klass, _klass_is_exact, offset, _field_offset, instance_id, speculative, depth);
5300 }
5301 }
5302 // The other case cannot happen, since t cannot be a subtype of an array.
5303 // The meet falls down to Object class below centerline.
5304 if (ptr == Constant) {
5305 ptr = NotNull;
5306 }
5307 if (instance_id > 0) {
5308 instance_id = InstanceBot;
5309 }
5310 interfaces = this_interfaces->intersection_with(tp_interfaces);
5311 return TypeInstPtr::make(ptr, ciEnv::current()->Object_klass(), interfaces, false, nullptr, offset, false, instance_id, speculative, depth);
5312 default: typerr(t);
5313 }
5314 }
5315 }
5316 return this; // Lint noise
5317 }
5318
5319
5320 template<class T> TypePtr::MeetResult TypePtr::meet_aryptr(PTR& ptr, const Type*& elem, const T* this_ary, const T* other_ary,
5321 ciKlass*& res_klass, bool& res_xk, bool &res_flat, bool& res_not_flat, bool& res_not_null_free) {
5322 int dummy;
5323 bool this_top_or_bottom = (this_ary->base_element_type(dummy) == Type::TOP || this_ary->base_element_type(dummy) == Type::BOTTOM);
5324 bool other_top_or_bottom = (other_ary->base_element_type(dummy) == Type::TOP || other_ary->base_element_type(dummy) == Type::BOTTOM);
5325 ciKlass* this_klass = this_ary->klass();
5326 ciKlass* other_klass = other_ary->klass();
5327 bool this_xk = this_ary->klass_is_exact();
5328 bool other_xk = other_ary->klass_is_exact();
5329 PTR this_ptr = this_ary->ptr();
5330 PTR other_ptr = other_ary->ptr();
5331 bool this_flat = this_ary->is_flat();
5332 bool this_not_flat = this_ary->is_not_flat();
5333 bool other_flat = other_ary->is_flat();
5334 bool other_not_flat = other_ary->is_not_flat();
5335 bool this_not_null_free = this_ary->is_not_null_free();
5336 bool other_not_null_free = other_ary->is_not_null_free();
5337 res_klass = nullptr;
5338 MeetResult result = SUBTYPE;
5339 res_flat = this_flat && other_flat;
5340 res_not_flat = this_not_flat && other_not_flat;
5341 res_not_null_free = this_not_null_free && other_not_null_free;
5342
5343 if (elem->isa_int()) {
5344 // Integral array element types have irrelevant lattice relations.
5345 // It is the klass that determines array layout, not the element type.
5346 if (this_top_or_bottom) {
5347 res_klass = other_klass;
5348 } else if (other_top_or_bottom || other_klass == this_klass) {
5349 res_klass = this_klass;
5350 } else {
5351 // Something like byte[int+] meets char[int+].
5352 // This must fall to bottom, not (int[-128..65535])[int+].
5353 // instance_id = InstanceBot;
5354 elem = Type::BOTTOM;
5355 result = NOT_SUBTYPE;
5356 if (above_centerline(ptr) || ptr == Constant) {
5357 ptr = NotNull;
5358 res_xk = false;
5359 return NOT_SUBTYPE;
5360 }
5361 }
5362 } else {// Non integral arrays.
5363 // Must fall to bottom if exact klasses in upper lattice
5364 // are not equal or super klass is exact.
5365 if ((above_centerline(ptr) || ptr == Constant) && !this_ary->is_same_java_type_as(other_ary) &&
5366 // meet with top[] and bottom[] are processed further down:
5367 !this_top_or_bottom && !other_top_or_bottom &&
5368 // both are exact and not equal:
5369 ((other_xk && this_xk) ||
5370 // 'tap' is exact and super or unrelated:
5371 (other_xk && !other_ary->is_meet_subtype_of(this_ary)) ||
5372 // 'this' is exact and super or unrelated:
5373 (this_xk && !this_ary->is_meet_subtype_of(other_ary)))) {
5374 if (above_centerline(ptr) || (elem->make_ptr() && above_centerline(elem->make_ptr()->_ptr))) {
5375 elem = Type::BOTTOM;
5376 }
5377 ptr = NotNull;
5378 res_xk = false;
5379 return NOT_SUBTYPE;
5380 }
5381 }
5382
5383 res_xk = false;
5384 switch (other_ptr) {
5385 case AnyNull:
5386 case TopPTR:
5387 // Compute new klass on demand, do not use tap->_klass
5388 if (below_centerline(this_ptr)) {
5389 res_xk = this_xk;
5390 if (this_ary->is_flat()) {
5391 elem = this_ary->elem();
5392 }
5393 } else {
5394 res_xk = (other_xk || this_xk);
5395 }
5396 break;
5397 case Constant: {
5398 if (this_ptr == Constant) {
5399 res_xk = true;
5400 } else if (above_centerline(this_ptr)) {
5401 res_xk = true;
5402 } else {
5403 // Only precise for identical arrays
5404 res_xk = this_xk && (this_ary->is_same_java_type_as(other_ary) || (this_top_or_bottom && other_top_or_bottom));
5405 // Even though MyValue is final, [LMyValue is only exact if the array
5406 // is null-free due to null-free [LMyValue <: null-able [LMyValue.
5407 if (res_xk && !res_not_null_free) {
5408 res_xk = false;
5409 }
5410 }
5411 break;
5412 }
5413 case NotNull:
5414 case BotPTR:
5415 // Compute new klass on demand, do not use tap->_klass
5416 if (above_centerline(this_ptr)) {
5417 res_xk = other_xk;
5418 if (other_ary->is_flat()) {
5419 elem = other_ary->elem();
5420 }
5421 } else {
5422 res_xk = (other_xk && this_xk) &&
5423 (this_ary->is_same_java_type_as(other_ary) || (this_top_or_bottom && other_top_or_bottom)); // Only precise for identical arrays
5424 // Even though MyValue is final, [LMyValue is only exact if the array
5425 // is null-free due to null-free [LMyValue <: null-able [LMyValue.
5426 if (res_xk && !res_not_null_free) {
5427 res_xk = false;
5428 }
5429 }
5430 break;
5431 default: {
5432 ShouldNotReachHere();
5433 return result;
5434 }
5435 }
5436 return result;
5437 }
5438
5439
5440 //------------------------------xdual------------------------------------------
5441 // Dual: compute field-by-field dual
5442 const Type *TypeAryPtr::xdual() const {
5443 return new TypeAryPtr(dual_ptr(), _const_oop, _ary->dual()->is_ary(), _klass, _klass_is_exact, dual_offset(), dual_field_offset(), dual_instance_id(), is_autobox_cache(), dual_speculative(), dual_inline_depth());
5444 }
5445
5446 Type::Offset TypeAryPtr::meet_field_offset(const Type::Offset offset) const {
5447 return _field_offset.meet(offset);
5448 }
5449
5450 //------------------------------dual_offset------------------------------------
5451 Type::Offset TypeAryPtr::dual_field_offset() const {
5452 return _field_offset.dual();
5453 }
5454
5455 //------------------------------dump2------------------------------------------
5456 #ifndef PRODUCT
5457 void TypeAryPtr::dump2( Dict &d, uint depth, outputStream *st ) const {
5458 _ary->dump2(d,depth,st);
5459 _interfaces->dump(st);
5460
5461 switch( _ptr ) {
5462 case Constant:
5463 const_oop()->print(st);
5464 break;
5465 case BotPTR:
5466 if (!WizardMode && !Verbose) {
5467 if( _klass_is_exact ) st->print(":exact");
5468 break;
5469 }
5470 case TopPTR:
5471 case AnyNull:
5472 case NotNull:
5473 st->print(":%s", ptr_msg[_ptr]);
5474 if( _klass_is_exact ) st->print(":exact");
5475 break;
5476 default:
5477 break;
5478 }
5479
5480 if (is_flat()) {
5481 st->print(":flat");
5482 st->print("(");
5483 _field_offset.dump2(st);
5484 st->print(")");
5485 }
5486 if (is_null_free()) {
5487 st->print(":null_free");
5488 }
5489 if (offset() != 0) {
5490 BasicType basic_elem_type = elem()->basic_type();
5491 int header_size = arrayOopDesc::base_offset_in_bytes(basic_elem_type);
5492 if( _offset == Offset::top ) st->print("+undefined");
5493 else if( _offset == Offset::bottom ) st->print("+any");
5494 else if( offset() < header_size ) st->print("+%d", offset());
5495 else {
5496 if (basic_elem_type == T_ILLEGAL) {
5497 st->print("+any");
5498 } else {
5499 int elem_size = type2aelembytes(basic_elem_type);
5500 st->print("[%d]", (offset() - header_size)/elem_size);
5501 }
5502 }
5503 }
5504 st->print(" *");
5505 if (_instance_id == InstanceTop)
5506 st->print(",iid=top");
5507 else if (_instance_id != InstanceBot)
5508 st->print(",iid=%d",_instance_id);
5509
5510 dump_inline_depth(st);
5511 dump_speculative(st);
5512 }
5513 #endif
5514
5515 bool TypeAryPtr::empty(void) const {
5516 if (_ary->empty()) return true;
5517 // FIXME: Does this belong here? Or in the meet code itself?
5518 if (is_flat() && is_not_flat()) {
5519 return true;
5520 }
5521 return TypeOopPtr::empty();
5522 }
5523
5524 //------------------------------add_offset-------------------------------------
5525 const TypePtr* TypeAryPtr::add_offset(intptr_t offset) const {
5526 return make(_ptr, _const_oop, _ary, _klass, _klass_is_exact, xadd_offset(offset), _field_offset, _instance_id, add_offset_speculative(offset), _inline_depth, _is_autobox_cache);
5527 }
5528
5529 const TypeAryPtr* TypeAryPtr::with_offset(intptr_t offset) const {
5530 return make(_ptr, _const_oop, _ary, _klass, _klass_is_exact, Offset(offset), _field_offset, _instance_id, with_offset_speculative(offset), _inline_depth, _is_autobox_cache);
5531 }
5532
5533 const TypeAryPtr* TypeAryPtr::with_ary(const TypeAry* ary) const {
5534 return make(_ptr, _const_oop, ary, _klass, _klass_is_exact, _offset, _field_offset, _instance_id, _speculative, _inline_depth, _is_autobox_cache);
5535 }
5536
5537 const TypeAryPtr* TypeAryPtr::remove_speculative() const {
5538 if (_speculative == nullptr) {
5539 return this;
5540 }
5541 assert(_inline_depth == InlineDepthTop || _inline_depth == InlineDepthBottom, "non speculative type shouldn't have inline depth");
5542 return make(_ptr, _const_oop, _ary->remove_speculative()->is_ary(), _klass, _klass_is_exact, _offset, _field_offset, _instance_id, nullptr, _inline_depth, _is_autobox_cache);
5543 }
5544
5545 const Type* TypeAryPtr::cleanup_speculative() const {
5546 if (speculative() == nullptr) {
5547 return this;
5548 }
5549 // Keep speculative part if it contains information about flat-/nullability
5550 const TypeAryPtr* spec_aryptr = speculative()->isa_aryptr();
5551 if (spec_aryptr != nullptr && !above_centerline(spec_aryptr->ptr()) &&
5552 (spec_aryptr->is_not_flat() || spec_aryptr->is_not_null_free())) {
5553 return this;
5554 }
5555 return TypeOopPtr::cleanup_speculative();
5556 }
5557
5558 const TypePtr* TypeAryPtr::with_inline_depth(int depth) const {
5559 if (!UseInlineDepthForSpeculativeTypes) {
5560 return this;
5561 }
5562 return make(_ptr, _const_oop, _ary->remove_speculative()->is_ary(), _klass, _klass_is_exact, _offset, _field_offset, _instance_id, _speculative, depth, _is_autobox_cache);
5563 }
5564
5565 const TypeAryPtr* TypeAryPtr::with_field_offset(int offset) const {
5566 return make(_ptr, _const_oop, _ary->remove_speculative()->is_ary(), _klass, _klass_is_exact, _offset, Offset(offset), _instance_id, _speculative, _inline_depth, _is_autobox_cache);
5567 }
5568
5569 const TypePtr* TypeAryPtr::add_field_offset_and_offset(intptr_t offset) const {
5570 int adj = 0;
5571 if (is_flat() && offset != Type::OffsetBot && offset != Type::OffsetTop) {
5572 if (_offset.get() != OffsetBot && _offset.get() != OffsetTop) {
5573 adj = _offset.get();
5574 offset += _offset.get();
5575 }
5576 uint header = arrayOopDesc::base_offset_in_bytes(T_OBJECT);
5577 if (_field_offset.get() != OffsetBot && _field_offset.get() != OffsetTop) {
5578 offset += _field_offset.get();
5579 if (_offset.get() == OffsetBot || _offset.get() == OffsetTop) {
5580 offset += header;
5581 }
5582 }
5583 if (elem()->make_oopptr()->is_inlinetypeptr() && (offset >= (intptr_t)header || offset < 0)) {
5584 // Try to get the field of the inline type array element we are pointing to
5585 ciInlineKlass* vk = elem()->inline_klass();
5586 int shift = flat_log_elem_size();
5587 int mask = (1 << shift) - 1;
5588 intptr_t field_offset = ((offset - header) & mask);
5589 ciField* field = vk->get_field_by_offset(field_offset + vk->first_field_offset(), false);
5590 if (field != nullptr) {
5591 return with_field_offset(field_offset)->add_offset(offset - field_offset - adj);
5592 }
5593 }
5594 }
5595 return add_offset(offset - adj);
5596 }
5597
5598 // Return offset incremented by field_offset for flat inline type arrays
5599 int TypeAryPtr::flat_offset() const {
5600 int offset = _offset.get();
5601 if (offset != Type::OffsetBot && offset != Type::OffsetTop &&
5602 _field_offset != Offset::bottom && _field_offset != Offset::top) {
5603 offset += _field_offset.get();
5604 }
5605 return offset;
5606 }
5607
5608 const TypePtr* TypeAryPtr::with_instance_id(int instance_id) const {
5609 assert(is_known_instance(), "should be known");
5610 return make(_ptr, _const_oop, _ary->remove_speculative()->is_ary(), _klass, _klass_is_exact, _offset, _field_offset, instance_id, _speculative, _inline_depth);
5611 }
5612
5613 //=============================================================================
5614
5615
5616 //------------------------------hash-------------------------------------------
5617 // Type-specific hashing function.
5618 uint TypeNarrowPtr::hash(void) const {
5619 return _ptrtype->hash() + 7;
5620 }
5621
5622 bool TypeNarrowPtr::singleton(void) const { // TRUE if type is a singleton
5623 return _ptrtype->singleton();
5624 }
5625
5626 bool TypeNarrowPtr::empty(void) const {
5627 return _ptrtype->empty();
5628 }
5629
5630 intptr_t TypeNarrowPtr::get_con() const {
5631 return _ptrtype->get_con();
5632 }
5633
5634 bool TypeNarrowPtr::eq( const Type *t ) const {
5635 const TypeNarrowPtr* tc = isa_same_narrowptr(t);
5636 if (tc != nullptr) {
5637 if (_ptrtype->base() != tc->_ptrtype->base()) {
5638 return false;
5639 }
5640 return tc->_ptrtype->eq(_ptrtype);
5641 }
5642 return false;
5643 }
5644
5645 const Type *TypeNarrowPtr::xdual() const { // Compute dual right now.
5646 const TypePtr* odual = _ptrtype->dual()->is_ptr();
5647 return make_same_narrowptr(odual);
5648 }
5649
5650
5651 const Type *TypeNarrowPtr::filter_helper(const Type *kills, bool include_speculative) const {
5652 if (isa_same_narrowptr(kills)) {
5653 const Type* ft =_ptrtype->filter_helper(is_same_narrowptr(kills)->_ptrtype, include_speculative);
5654 if (ft->empty())
5655 return Type::TOP; // Canonical empty value
5656 if (ft->isa_ptr()) {
5657 return make_hash_same_narrowptr(ft->isa_ptr());
5658 }
5659 return ft;
5660 } else if (kills->isa_ptr()) {
5661 const Type* ft = _ptrtype->join_helper(kills, include_speculative);
5662 if (ft->empty())
5663 return Type::TOP; // Canonical empty value
5664 return ft;
5665 } else {
5666 return Type::TOP;
5667 }
5668 }
5669
5670 //------------------------------xmeet------------------------------------------
5671 // Compute the MEET of two types. It returns a new Type object.
5672 const Type *TypeNarrowPtr::xmeet( const Type *t ) const {
5673 // Perform a fast test for common case; meeting the same types together.
5674 if( this == t ) return this; // Meeting same type-rep?
5675
5676 if (t->base() == base()) {
5677 const Type* result = _ptrtype->xmeet(t->make_ptr());
5678 if (result->isa_ptr()) {
5679 return make_hash_same_narrowptr(result->is_ptr());
5680 }
5681 return result;
5682 }
5683
5684 // Current "this->_base" is NarrowKlass or NarrowOop
5685 switch (t->base()) { // switch on original type
5686
5687 case Int: // Mixing ints & oops happens when javac
5688 case Long: // reuses local variables
5689 case FloatTop:
5690 case FloatCon:
5691 case FloatBot:
5692 case DoubleTop:
5693 case DoubleCon:
5694 case DoubleBot:
5695 case AnyPtr:
5696 case RawPtr:
5697 case OopPtr:
5698 case InstPtr:
5699 case AryPtr:
5700 case MetadataPtr:
5701 case KlassPtr:
5702 case InstKlassPtr:
5703 case AryKlassPtr:
5704 case NarrowOop:
5705 case NarrowKlass:
5706 case Bottom: // Ye Olde Default
5707 return Type::BOTTOM;
5708 case Top:
5709 return this;
5710
5711 default: // All else is a mistake
5712 typerr(t);
5713
5714 } // End of switch
5715
5716 return this;
5717 }
5718
5719 #ifndef PRODUCT
5720 void TypeNarrowPtr::dump2( Dict & d, uint depth, outputStream *st ) const {
5721 _ptrtype->dump2(d, depth, st);
5722 }
5723 #endif
5724
5725 const TypeNarrowOop *TypeNarrowOop::BOTTOM;
5726 const TypeNarrowOop *TypeNarrowOop::NULL_PTR;
5727
5728
5729 const TypeNarrowOop* TypeNarrowOop::make(const TypePtr* type) {
5730 return (const TypeNarrowOop*)(new TypeNarrowOop(type))->hashcons();
5731 }
5732
5733 const TypeNarrowOop* TypeNarrowOop::remove_speculative() const {
5734 return make(_ptrtype->remove_speculative()->is_ptr());
5735 }
5736
5737 const Type* TypeNarrowOop::cleanup_speculative() const {
5738 return make(_ptrtype->cleanup_speculative()->is_ptr());
5739 }
5740
5741 #ifndef PRODUCT
5742 void TypeNarrowOop::dump2( Dict & d, uint depth, outputStream *st ) const {
5743 st->print("narrowoop: ");
5744 TypeNarrowPtr::dump2(d, depth, st);
5745 }
5746 #endif
5747
5748 const TypeNarrowKlass *TypeNarrowKlass::NULL_PTR;
5749
5750 const TypeNarrowKlass* TypeNarrowKlass::make(const TypePtr* type) {
5751 return (const TypeNarrowKlass*)(new TypeNarrowKlass(type))->hashcons();
5752 }
5753
5754 #ifndef PRODUCT
5755 void TypeNarrowKlass::dump2( Dict & d, uint depth, outputStream *st ) const {
5756 st->print("narrowklass: ");
5757 TypeNarrowPtr::dump2(d, depth, st);
5758 }
5759 #endif
5760
5761
5762 //------------------------------eq---------------------------------------------
5763 // Structural equality check for Type representations
5764 bool TypeMetadataPtr::eq( const Type *t ) const {
5765 const TypeMetadataPtr *a = (const TypeMetadataPtr*)t;
5766 ciMetadata* one = metadata();
5767 ciMetadata* two = a->metadata();
5768 if (one == nullptr || two == nullptr) {
5769 return (one == two) && TypePtr::eq(t);
5770 } else {
5771 return one->equals(two) && TypePtr::eq(t);
5772 }
5773 }
5774
5775 //------------------------------hash-------------------------------------------
5776 // Type-specific hashing function.
5777 uint TypeMetadataPtr::hash(void) const {
5778 return
5779 (metadata() ? metadata()->hash() : 0) +
5780 TypePtr::hash();
5781 }
5782
5783 //------------------------------singleton--------------------------------------
5784 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
5785 // constants
5786 bool TypeMetadataPtr::singleton(void) const {
5787 // detune optimizer to not generate constant metadata + constant offset as a constant!
5788 // TopPTR, Null, AnyNull, Constant are all singletons
5789 return (offset() == 0) && !below_centerline(_ptr);
5790 }
5791
5792 //------------------------------add_offset-------------------------------------
5793 const TypePtr* TypeMetadataPtr::add_offset( intptr_t offset ) const {
5794 return make( _ptr, _metadata, xadd_offset(offset));
5795 }
5796
5797 //-----------------------------filter------------------------------------------
5798 // Do not allow interface-vs.-noninterface joins to collapse to top.
5799 const Type *TypeMetadataPtr::filter_helper(const Type *kills, bool include_speculative) const {
5800 const TypeMetadataPtr* ft = join_helper(kills, include_speculative)->isa_metadataptr();
5801 if (ft == nullptr || ft->empty())
5802 return Type::TOP; // Canonical empty value
5803 return ft;
5804 }
5805
5806 //------------------------------get_con----------------------------------------
5807 intptr_t TypeMetadataPtr::get_con() const {
5808 assert( _ptr == Null || _ptr == Constant, "" );
5809 assert(offset() >= 0, "");
5810
5811 if (offset() != 0) {
5812 // After being ported to the compiler interface, the compiler no longer
5813 // directly manipulates the addresses of oops. Rather, it only has a pointer
5814 // to a handle at compile time. This handle is embedded in the generated
5815 // code and dereferenced at the time the nmethod is made. Until that time,
5816 // it is not reasonable to do arithmetic with the addresses of oops (we don't
5817 // have access to the addresses!). This does not seem to currently happen,
5818 // but this assertion here is to help prevent its occurrence.
5819 tty->print_cr("Found oop constant with non-zero offset");
5820 ShouldNotReachHere();
5821 }
5822
5823 return (intptr_t)metadata()->constant_encoding();
5824 }
5825
5826 //------------------------------cast_to_ptr_type-------------------------------
5827 const TypeMetadataPtr* TypeMetadataPtr::cast_to_ptr_type(PTR ptr) const {
5828 if( ptr == _ptr ) return this;
5829 return make(ptr, metadata(), _offset);
5830 }
5831
5832 //------------------------------meet-------------------------------------------
5833 // Compute the MEET of two types. It returns a new Type object.
5834 const Type *TypeMetadataPtr::xmeet( const Type *t ) const {
5835 // Perform a fast test for common case; meeting the same types together.
5836 if( this == t ) return this; // Meeting same type-rep?
5837
5838 // Current "this->_base" is OopPtr
5839 switch (t->base()) { // switch on original type
5840
5841 case Int: // Mixing ints & oops happens when javac
5842 case Long: // reuses local variables
5843 case FloatTop:
5844 case FloatCon:
5845 case FloatBot:
5846 case DoubleTop:
5847 case DoubleCon:
5848 case DoubleBot:
5849 case NarrowOop:
5850 case NarrowKlass:
5851 case Bottom: // Ye Olde Default
5852 return Type::BOTTOM;
5853 case Top:
5854 return this;
5855
5856 default: // All else is a mistake
5857 typerr(t);
5858
5859 case AnyPtr: {
5860 // Found an AnyPtr type vs self-OopPtr type
5861 const TypePtr *tp = t->is_ptr();
5862 Offset offset = meet_offset(tp->offset());
5863 PTR ptr = meet_ptr(tp->ptr());
5864 switch (tp->ptr()) {
5865 case Null:
5866 if (ptr == Null) return TypePtr::make(AnyPtr, ptr, offset, tp->speculative(), tp->inline_depth());
5867 // else fall through:
5868 case TopPTR:
5869 case AnyNull: {
5870 return make(ptr, _metadata, offset);
5871 }
5872 case BotPTR:
5873 case NotNull:
5874 return TypePtr::make(AnyPtr, ptr, offset, tp->speculative(), tp->inline_depth());
5875 default: typerr(t);
5876 }
5877 }
5878
5879 case RawPtr:
5880 case KlassPtr:
5881 case InstKlassPtr:
5882 case AryKlassPtr:
5883 case OopPtr:
5884 case InstPtr:
5885 case AryPtr:
5886 return TypePtr::BOTTOM; // Oop meet raw is not well defined
5887
5888 case MetadataPtr: {
5889 const TypeMetadataPtr *tp = t->is_metadataptr();
5890 Offset offset = meet_offset(tp->offset());
5891 PTR tptr = tp->ptr();
5892 PTR ptr = meet_ptr(tptr);
5893 ciMetadata* md = (tptr == TopPTR) ? metadata() : tp->metadata();
5894 if (tptr == TopPTR || _ptr == TopPTR ||
5895 metadata()->equals(tp->metadata())) {
5896 return make(ptr, md, offset);
5897 }
5898 // metadata is different
5899 if( ptr == Constant ) { // Cannot be equal constants, so...
5900 if( tptr == Constant && _ptr != Constant) return t;
5901 if( _ptr == Constant && tptr != Constant) return this;
5902 ptr = NotNull; // Fall down in lattice
5903 }
5904 return make(ptr, nullptr, offset);
5905 break;
5906 }
5907 } // End of switch
5908 return this; // Return the double constant
5909 }
5910
5911
5912 //------------------------------xdual------------------------------------------
5913 // Dual of a pure metadata pointer.
5914 const Type *TypeMetadataPtr::xdual() const {
5915 return new TypeMetadataPtr(dual_ptr(), metadata(), dual_offset());
5916 }
5917
5918 //------------------------------dump2------------------------------------------
5919 #ifndef PRODUCT
5920 void TypeMetadataPtr::dump2( Dict &d, uint depth, outputStream *st ) const {
5921 st->print("metadataptr:%s", ptr_msg[_ptr]);
5922 if( metadata() ) st->print(INTPTR_FORMAT, p2i(metadata()));
5923 switch (offset()) {
5924 case OffsetTop: st->print("+top"); break;
5925 case OffsetBot: st->print("+any"); break;
5926 case 0: break;
5927 default: st->print("+%d",offset()); break;
5928 }
5929 }
5930 #endif
5931
5932
5933 //=============================================================================
5934 // Convenience common pre-built type.
5935 const TypeMetadataPtr *TypeMetadataPtr::BOTTOM;
5936
5937 TypeMetadataPtr::TypeMetadataPtr(PTR ptr, ciMetadata* metadata, Offset offset):
5938 TypePtr(MetadataPtr, ptr, offset), _metadata(metadata) {
5939 }
5940
5941 const TypeMetadataPtr* TypeMetadataPtr::make(ciMethod* m) {
5942 return make(Constant, m, Offset(0));
5943 }
5944 const TypeMetadataPtr* TypeMetadataPtr::make(ciMethodData* m) {
5945 return make(Constant, m, Offset(0));
5946 }
5947
5948 //------------------------------make-------------------------------------------
5949 // Create a meta data constant
5950 const TypeMetadataPtr* TypeMetadataPtr::make(PTR ptr, ciMetadata* m, Offset offset) {
5951 assert(m == nullptr || !m->is_klass(), "wrong type");
5952 return (TypeMetadataPtr*)(new TypeMetadataPtr(ptr, m, offset))->hashcons();
5953 }
5954
5955
5956 const TypeKlassPtr* TypeAryPtr::as_klass_type(bool try_for_exact) const {
5957 const Type* elem = _ary->_elem;
5958 bool xk = klass_is_exact();
5959 if (elem->make_oopptr() != nullptr) {
5960 elem = elem->make_oopptr()->as_klass_type(try_for_exact);
5961 if (elem->is_klassptr()->klass_is_exact() &&
5962 // Even though MyValue is final, [LMyValue is only exact if the array
5963 // is null-free due to null-free [LMyValue <: null-able [LMyValue.
5964 (is_null_free() || !_ary->_elem->make_oopptr()->is_inlinetypeptr())) {
5965 xk = true;
5966 }
5967 }
5968 return TypeAryKlassPtr::make(xk ? TypePtr::Constant : TypePtr::NotNull, elem, klass(), Offset(0), is_not_flat(), is_not_null_free(), is_null_free());
5969 }
5970
5971 const TypeKlassPtr* TypeKlassPtr::make(ciKlass* klass, InterfaceHandling interface_handling) {
5972 if (klass->is_instance_klass()) {
5973 return TypeInstKlassPtr::make(klass, interface_handling);
5974 }
5975 return TypeAryKlassPtr::make(klass, interface_handling);
5976 }
5977
5978 const TypeKlassPtr* TypeKlassPtr::make(PTR ptr, ciKlass* klass, Offset offset, InterfaceHandling interface_handling) {
5979 if (klass->is_instance_klass()) {
5980 const TypeInterfaces* interfaces = TypePtr::interfaces(klass, true, true, false, interface_handling);
5981 return TypeInstKlassPtr::make(ptr, klass, interfaces, offset);
5982 }
5983 return TypeAryKlassPtr::make(ptr, klass, offset, interface_handling);
5984 }
5985
5986 TypeKlassPtr::TypeKlassPtr(TYPES t, PTR ptr, ciKlass* klass, const TypeInterfaces* interfaces, Offset offset)
5987 : TypePtr(t, ptr, offset), _klass(klass), _interfaces(interfaces) {
5988 assert(klass == nullptr || !klass->is_loaded() || (klass->is_instance_klass() && !klass->is_interface()) ||
5989 klass->is_type_array_klass() || klass->is_flat_array_klass() || !klass->as_obj_array_klass()->base_element_klass()->is_interface(), "no interface here");
5990 }
5991
5992 // Is there a single ciKlass* that can represent that type?
5993 ciKlass* TypeKlassPtr::exact_klass_helper() const {
5994 assert(_klass->is_instance_klass() && !_klass->is_interface(), "No interface");
5995 if (_interfaces->empty()) {
5996 return _klass;
5997 }
5998 if (_klass != ciEnv::current()->Object_klass()) {
5999 if (_interfaces->eq(_klass->as_instance_klass())) {
6000 return _klass;
6001 }
6002 return nullptr;
6003 }
6004 return _interfaces->exact_klass();
6005 }
6006
6007 //------------------------------eq---------------------------------------------
6008 // Structural equality check for Type representations
6009 bool TypeKlassPtr::eq(const Type *t) const {
6010 const TypeKlassPtr *p = t->is_klassptr();
6011 return
6012 _interfaces->eq(p->_interfaces) &&
6013 TypePtr::eq(p);
6014 }
6015
6016 //------------------------------hash-------------------------------------------
6017 // Type-specific hashing function.
6018 uint TypeKlassPtr::hash(void) const {
6019 return TypePtr::hash() + _interfaces->hash();
6020 }
6021
6022 //------------------------------singleton--------------------------------------
6023 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
6024 // constants
6025 bool TypeKlassPtr::singleton(void) const {
6026 // detune optimizer to not generate constant klass + constant offset as a constant!
6027 // TopPTR, Null, AnyNull, Constant are all singletons
6028 return (offset() == 0) && !below_centerline(_ptr);
6029 }
6030
6031 // Do not allow interface-vs.-noninterface joins to collapse to top.
6032 const Type *TypeKlassPtr::filter_helper(const Type *kills, bool include_speculative) const {
6033 // logic here mirrors the one from TypeOopPtr::filter. See comments
6034 // there.
6035 const Type* ft = join_helper(kills, include_speculative);
6036 const TypeKlassPtr* ftkp = ft->isa_instklassptr();
6037 const TypeKlassPtr* ktkp = kills->isa_instklassptr();
6038
6039 if (ft->empty()) {
6040 return Type::TOP; // Canonical empty value
6041 }
6042
6043 return ft;
6044 }
6045
6046 const TypeInterfaces* TypeKlassPtr::meet_interfaces(const TypeKlassPtr* other) const {
6047 if (above_centerline(_ptr) && above_centerline(other->_ptr)) {
6048 return _interfaces->union_with(other->_interfaces);
6049 } else if (above_centerline(_ptr) && !above_centerline(other->_ptr)) {
6050 return other->_interfaces;
6051 } else if (above_centerline(other->_ptr) && !above_centerline(_ptr)) {
6052 return _interfaces;
6053 }
6054 return _interfaces->intersection_with(other->_interfaces);
6055 }
6056
6057 //------------------------------get_con----------------------------------------
6058 intptr_t TypeKlassPtr::get_con() const {
6059 assert( _ptr == Null || _ptr == Constant, "" );
6060 assert( offset() >= 0, "" );
6061
6062 if (offset() != 0) {
6063 // After being ported to the compiler interface, the compiler no longer
6064 // directly manipulates the addresses of oops. Rather, it only has a pointer
6065 // to a handle at compile time. This handle is embedded in the generated
6066 // code and dereferenced at the time the nmethod is made. Until that time,
6067 // it is not reasonable to do arithmetic with the addresses of oops (we don't
6068 // have access to the addresses!). This does not seem to currently happen,
6069 // but this assertion here is to help prevent its occurrence.
6070 tty->print_cr("Found oop constant with non-zero offset");
6071 ShouldNotReachHere();
6072 }
6073
6074 ciKlass* k = exact_klass();
6075
6076 return (intptr_t)k->constant_encoding();
6077 }
6078
6079 //------------------------------dump2------------------------------------------
6080 // Dump Klass Type
6081 #ifndef PRODUCT
6082 void TypeKlassPtr::dump2(Dict & d, uint depth, outputStream *st) const {
6083 switch(_ptr) {
6084 case Constant:
6085 st->print("precise ");
6086 case NotNull:
6087 {
6088 const char *name = klass()->name()->as_utf8();
6089 if (name) {
6090 st->print("%s: " INTPTR_FORMAT, name, p2i(klass()));
6091 } else {
6092 ShouldNotReachHere();
6093 }
6094 _interfaces->dump(st);
6095 }
6096 case BotPTR:
6097 if (!WizardMode && !Verbose && _ptr != Constant) break;
6098 case TopPTR:
6099 case AnyNull:
6100 st->print(":%s", ptr_msg[_ptr]);
6101 if (_ptr == Constant) st->print(":exact");
6102 break;
6103 default:
6104 break;
6105 }
6106 if (Verbose) {
6107 if (isa_instklassptr() && is_instklassptr()->flat_in_array()) st->print(":flat in array");
6108 }
6109 _offset.dump2(st);
6110 st->print(" *");
6111 }
6112 #endif
6113
6114 //=============================================================================
6115 // Convenience common pre-built types.
6116
6117 // Not-null object klass or below
6118 const TypeInstKlassPtr *TypeInstKlassPtr::OBJECT;
6119 const TypeInstKlassPtr *TypeInstKlassPtr::OBJECT_OR_NULL;
6120
6121 bool TypeInstKlassPtr::eq(const Type *t) const {
6122 const TypeKlassPtr *p = t->is_klassptr();
6123 return
6124 klass()->equals(p->klass()) &&
6125 flat_in_array() == p->flat_in_array() &&
6126 TypeKlassPtr::eq(p);
6127 }
6128
6129 uint TypeInstKlassPtr::hash(void) const {
6130 return klass()->hash() + TypeKlassPtr::hash() + (uint)flat_in_array();
6131 }
6132
6133 const TypeInstKlassPtr *TypeInstKlassPtr::make(PTR ptr, ciKlass* k, const TypeInterfaces* interfaces, Offset offset, bool flat_in_array) {
6134 flat_in_array = flat_in_array || k->flat_in_array();
6135
6136 TypeInstKlassPtr *r =
6137 (TypeInstKlassPtr*)(new TypeInstKlassPtr(ptr, k, interfaces, offset, flat_in_array))->hashcons();
6138
6139 return r;
6140 }
6141
6142 //------------------------------add_offset-------------------------------------
6143 // Access internals of klass object
6144 const TypePtr *TypeInstKlassPtr::add_offset( intptr_t offset ) const {
6145 return make(_ptr, klass(), _interfaces, xadd_offset(offset), flat_in_array());
6146 }
6147
6148 const TypeInstKlassPtr* TypeInstKlassPtr::with_offset(intptr_t offset) const {
6149 return make(_ptr, klass(), _interfaces, Offset(offset), flat_in_array());
6150 }
6151
6152 //------------------------------cast_to_ptr_type-------------------------------
6153 const TypeInstKlassPtr* TypeInstKlassPtr::cast_to_ptr_type(PTR ptr) const {
6154 assert(_base == InstKlassPtr, "subclass must override cast_to_ptr_type");
6155 if( ptr == _ptr ) return this;
6156 return make(ptr, _klass, _interfaces, _offset, flat_in_array());
6157 }
6158
6159
6160 bool TypeInstKlassPtr::must_be_exact() const {
6161 if (!_klass->is_loaded()) return false;
6162 ciInstanceKlass* ik = _klass->as_instance_klass();
6163 if (ik->is_final()) return true; // cannot clear xk
6164 return false;
6165 }
6166
6167 //-----------------------------cast_to_exactness-------------------------------
6168 const TypeKlassPtr* TypeInstKlassPtr::cast_to_exactness(bool klass_is_exact) const {
6169 if (klass_is_exact == (_ptr == Constant)) return this;
6170 if (must_be_exact()) return this;
6171 ciKlass* k = klass();
6172 return make(klass_is_exact ? Constant : NotNull, k, _interfaces, _offset, flat_in_array());
6173 }
6174
6175
6176 //-----------------------------as_instance_type--------------------------------
6177 // Corresponding type for an instance of the given class.
6178 // It will be NotNull, and exact if and only if the klass type is exact.
6179 const TypeOopPtr* TypeInstKlassPtr::as_instance_type(bool klass_change) const {
6180 ciKlass* k = klass();
6181 bool xk = klass_is_exact();
6182 Compile* C = Compile::current();
6183 Dependencies* deps = C->dependencies();
6184 assert((deps != nullptr) == (C->method() != nullptr && C->method()->code_size() > 0), "sanity");
6185 // Element is an instance
6186 bool klass_is_exact = false;
6187 const TypeInterfaces* interfaces = _interfaces;
6188 if (k->is_loaded()) {
6189 // Try to set klass_is_exact.
6190 ciInstanceKlass* ik = k->as_instance_klass();
6191 klass_is_exact = ik->is_final();
6192 if (!klass_is_exact && klass_change
6193 && deps != nullptr && UseUniqueSubclasses) {
6194 ciInstanceKlass* sub = ik->unique_concrete_subklass();
6195 if (sub != nullptr) {
6196 if (_interfaces->eq(sub)) {
6197 deps->assert_abstract_with_unique_concrete_subtype(ik, sub);
6198 k = ik = sub;
6199 xk = sub->is_final();
6200 }
6201 }
6202 }
6203 }
6204 return TypeInstPtr::make(TypePtr::BotPTR, k, interfaces, xk, nullptr, Offset(0), flat_in_array() && !klass()->is_inlinetype());
6205 }
6206
6207 //------------------------------xmeet------------------------------------------
6208 // Compute the MEET of two types, return a new Type object.
6209 const Type *TypeInstKlassPtr::xmeet( const Type *t ) const {
6210 // Perform a fast test for common case; meeting the same types together.
6211 if( this == t ) return this; // Meeting same type-rep?
6212
6213 // Current "this->_base" is Pointer
6214 switch (t->base()) { // switch on original type
6215
6216 case Int: // Mixing ints & oops happens when javac
6217 case Long: // reuses local variables
6218 case FloatTop:
6219 case FloatCon:
6220 case FloatBot:
6221 case DoubleTop:
6222 case DoubleCon:
6223 case DoubleBot:
6224 case NarrowOop:
6225 case NarrowKlass:
6226 case Bottom: // Ye Olde Default
6227 return Type::BOTTOM;
6228 case Top:
6229 return this;
6230
6231 default: // All else is a mistake
6232 typerr(t);
6233
6234 case AnyPtr: { // Meeting to AnyPtrs
6235 // Found an AnyPtr type vs self-KlassPtr type
6236 const TypePtr *tp = t->is_ptr();
6237 Offset offset = meet_offset(tp->offset());
6238 PTR ptr = meet_ptr(tp->ptr());
6239 switch (tp->ptr()) {
6240 case TopPTR:
6241 return this;
6242 case Null:
6243 if( ptr == Null ) return TypePtr::make(AnyPtr, ptr, offset, tp->speculative(), tp->inline_depth());
6244 case AnyNull:
6245 return make(ptr, klass(), _interfaces, offset, flat_in_array());
6246 case BotPTR:
6247 case NotNull:
6248 return TypePtr::make(AnyPtr, ptr, offset, tp->speculative(), tp->inline_depth());
6249 default: typerr(t);
6250 }
6251 }
6252
6253 case RawPtr:
6254 case MetadataPtr:
6255 case OopPtr:
6256 case AryPtr: // Meet with AryPtr
6257 case InstPtr: // Meet with InstPtr
6258 return TypePtr::BOTTOM;
6259
6260 //
6261 // A-top }
6262 // / | \ } Tops
6263 // B-top A-any C-top }
6264 // | / | \ | } Any-nulls
6265 // B-any | C-any }
6266 // | | |
6267 // B-con A-con C-con } constants; not comparable across classes
6268 // | | |
6269 // B-not | C-not }
6270 // | \ | / | } not-nulls
6271 // B-bot A-not C-bot }
6272 // \ | / } Bottoms
6273 // A-bot }
6274 //
6275
6276 case InstKlassPtr: { // Meet two KlassPtr types
6277 const TypeInstKlassPtr *tkls = t->is_instklassptr();
6278 Offset off = meet_offset(tkls->offset());
6279 PTR ptr = meet_ptr(tkls->ptr());
6280 const TypeInterfaces* interfaces = meet_interfaces(tkls);
6281
6282 ciKlass* res_klass = nullptr;
6283 bool res_xk = false;
6284 bool res_flat_in_array = false;
6285 switch(meet_instptr(ptr, interfaces, this, tkls, res_klass, res_xk, res_flat_in_array)) {
6286 case UNLOADED:
6287 ShouldNotReachHere();
6288 case SUBTYPE:
6289 case NOT_SUBTYPE:
6290 case LCA:
6291 case QUICK: {
6292 assert(res_xk == (ptr == Constant), "");
6293 const Type* res = make(ptr, res_klass, interfaces, off, res_flat_in_array);
6294 return res;
6295 }
6296 default:
6297 ShouldNotReachHere();
6298 }
6299 } // End of case KlassPtr
6300 case AryKlassPtr: { // All arrays inherit from Object class
6301 const TypeAryKlassPtr *tp = t->is_aryklassptr();
6302 Offset offset = meet_offset(tp->offset());
6303 PTR ptr = meet_ptr(tp->ptr());
6304 const TypeInterfaces* interfaces = meet_interfaces(tp);
6305 const TypeInterfaces* tp_interfaces = tp->_interfaces;
6306 const TypeInterfaces* this_interfaces = _interfaces;
6307
6308 switch (ptr) {
6309 case TopPTR:
6310 case AnyNull: // Fall 'down' to dual of object klass
6311 // For instances when a subclass meets a superclass we fall
6312 // below the centerline when the superclass is exact. We need to
6313 // do the same here.
6314 if (klass()->equals(ciEnv::current()->Object_klass()) && tp_interfaces->contains(this_interfaces) && !klass_is_exact()) {
6315 return TypeAryKlassPtr::make(ptr, tp->elem(), tp->klass(), offset, tp->is_not_flat(), tp->is_not_null_free(), tp->is_null_free());
6316 } else {
6317 // cannot subclass, so the meet has to fall badly below the centerline
6318 ptr = NotNull;
6319 interfaces = _interfaces->intersection_with(tp->_interfaces);
6320 return make(ptr, ciEnv::current()->Object_klass(), interfaces, offset, false);
6321 }
6322 case Constant:
6323 case NotNull:
6324 case BotPTR: // Fall down to object klass
6325 // LCA is object_klass, but if we subclass from the top we can do better
6326 if( above_centerline(_ptr) ) { // if( _ptr == TopPTR || _ptr == AnyNull )
6327 // If 'this' (InstPtr) is above the centerline and it is Object class
6328 // then we can subclass in the Java class hierarchy.
6329 // For instances when a subclass meets a superclass we fall
6330 // below the centerline when the superclass is exact. We need
6331 // to do the same here.
6332 if (klass()->equals(ciEnv::current()->Object_klass()) && tp_interfaces->contains(this_interfaces) && !klass_is_exact()) {
6333 // that is, tp's array type is a subtype of my klass
6334 return TypeAryKlassPtr::make(ptr, tp->elem(), tp->klass(), offset, tp->is_not_flat(), tp->is_not_null_free(), tp->is_null_free());
6335 }
6336 }
6337 // The other case cannot happen, since I cannot be a subtype of an array.
6338 // The meet falls down to Object class below centerline.
6339 if( ptr == Constant )
6340 ptr = NotNull;
6341 interfaces = this_interfaces->intersection_with(tp_interfaces);
6342 return make(ptr, ciEnv::current()->Object_klass(), interfaces, offset, false);
6343 default: typerr(t);
6344 }
6345 }
6346
6347 } // End of switch
6348 return this; // Return the double constant
6349 }
6350
6351 //------------------------------xdual------------------------------------------
6352 // Dual: compute field-by-field dual
6353 const Type *TypeInstKlassPtr::xdual() const {
6354 return new TypeInstKlassPtr(dual_ptr(), klass(), _interfaces, dual_offset(), flat_in_array());
6355 }
6356
6357 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) {
6358 static_assert(std::is_base_of<T2, T1>::value, "");
6359 if (!this_one->is_loaded() || !other->is_loaded()) {
6360 return false;
6361 }
6362 if (!this_one->is_instance_type(other)) {
6363 return false;
6364 }
6365
6366 if (!other_exact) {
6367 return false;
6368 }
6369
6370 if (other->klass()->equals(ciEnv::current()->Object_klass()) && other->_interfaces->empty()) {
6371 return true;
6372 }
6373
6374 return this_one->klass()->is_subtype_of(other->klass()) && this_one->_interfaces->contains(other->_interfaces);
6375 }
6376
6377 bool TypeInstKlassPtr::is_java_subtype_of_helper(const TypeKlassPtr* other, bool this_exact, bool other_exact) const {
6378 return TypePtr::is_java_subtype_of_helper_for_instance(this, other, this_exact, other_exact);
6379 }
6380
6381 template <class T1, class T2> bool TypePtr::is_same_java_type_as_helper_for_instance(const T1* this_one, const T2* other) {
6382 static_assert(std::is_base_of<T2, T1>::value, "");
6383 if (!this_one->is_loaded() || !other->is_loaded()) {
6384 return false;
6385 }
6386 if (!this_one->is_instance_type(other)) {
6387 return false;
6388 }
6389 return this_one->klass()->equals(other->klass()) && this_one->_interfaces->eq(other->_interfaces);
6390 }
6391
6392 bool TypeInstKlassPtr::is_same_java_type_as_helper(const TypeKlassPtr* other) const {
6393 return TypePtr::is_same_java_type_as_helper_for_instance(this, other);
6394 }
6395
6396 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) {
6397 static_assert(std::is_base_of<T2, T1>::value, "");
6398 if (!this_one->is_loaded() || !other->is_loaded()) {
6399 return true;
6400 }
6401
6402 if (this_one->is_array_type(other)) {
6403 return !this_exact && this_one->klass()->equals(ciEnv::current()->Object_klass()) && other->_interfaces->contains(this_one->_interfaces);
6404 }
6405
6406 assert(this_one->is_instance_type(other), "unsupported");
6407
6408 if (this_exact && other_exact) {
6409 return this_one->is_java_subtype_of(other);
6410 }
6411
6412 if (!this_one->klass()->is_subtype_of(other->klass()) && !other->klass()->is_subtype_of(this_one->klass())) {
6413 return false;
6414 }
6415
6416 if (this_exact) {
6417 return this_one->klass()->is_subtype_of(other->klass()) && this_one->_interfaces->contains(other->_interfaces);
6418 }
6419
6420 return true;
6421 }
6422
6423 bool TypeInstKlassPtr::maybe_java_subtype_of_helper(const TypeKlassPtr* other, bool this_exact, bool other_exact) const {
6424 return TypePtr::maybe_java_subtype_of_helper_for_instance(this, other, this_exact, other_exact);
6425 }
6426
6427 const TypeKlassPtr* TypeInstKlassPtr::try_improve() const {
6428 if (!UseUniqueSubclasses) {
6429 return this;
6430 }
6431 ciKlass* k = klass();
6432 Compile* C = Compile::current();
6433 Dependencies* deps = C->dependencies();
6434 assert((deps != nullptr) == (C->method() != nullptr && C->method()->code_size() > 0), "sanity");
6435 const TypeInterfaces* interfaces = _interfaces;
6436 if (k->is_loaded()) {
6437 ciInstanceKlass* ik = k->as_instance_klass();
6438 bool klass_is_exact = ik->is_final();
6439 if (!klass_is_exact &&
6440 deps != nullptr) {
6441 ciInstanceKlass* sub = ik->unique_concrete_subklass();
6442 if (sub != nullptr) {
6443 if (_interfaces->eq(sub)) {
6444 deps->assert_abstract_with_unique_concrete_subtype(ik, sub);
6445 k = ik = sub;
6446 klass_is_exact = sub->is_final();
6447 return TypeKlassPtr::make(klass_is_exact ? Constant : _ptr, k, _offset);
6448 }
6449 }
6450 }
6451 }
6452 return this;
6453 }
6454
6455 bool TypeInstKlassPtr::can_be_inline_array() const {
6456 return _klass->equals(ciEnv::current()->Object_klass()) && TypeAryKlassPtr::_array_interfaces->contains(_interfaces);
6457 }
6458
6459 bool TypeAryKlassPtr::can_be_inline_array() const {
6460 return _elem->isa_instklassptr() && _elem->is_instklassptr()->_klass->can_be_inline_klass();
6461 }
6462
6463 bool TypeInstPtr::can_be_inline_array() const {
6464 return _klass->equals(ciEnv::current()->Object_klass()) && TypeAryPtr::_array_interfaces->contains(_interfaces);
6465 }
6466
6467 bool TypeAryPtr::can_be_inline_array() const {
6468 return elem()->make_ptr() && elem()->make_ptr()->isa_instptr() && elem()->make_ptr()->is_instptr()->_klass->can_be_inline_klass();
6469 }
6470
6471 const TypeAryKlassPtr *TypeAryKlassPtr::make(PTR ptr, const Type* elem, ciKlass* k, Offset offset, bool not_flat, bool not_null_free, bool null_free) {
6472 return (TypeAryKlassPtr*)(new TypeAryKlassPtr(ptr, elem, k, offset, not_flat, not_null_free, null_free))->hashcons();
6473 }
6474
6475 const TypeAryKlassPtr* TypeAryKlassPtr::make(PTR ptr, ciKlass* k, Offset offset, InterfaceHandling interface_handling, bool not_flat, bool not_null_free, bool null_free) {
6476 if (k->is_obj_array_klass()) {
6477 // Element is an object array. Recursively call ourself.
6478 ciKlass* eklass = k->as_obj_array_klass()->element_klass();
6479 const TypeKlassPtr* etype = TypeKlassPtr::make(eklass, interface_handling)->cast_to_exactness(false);
6480 return TypeAryKlassPtr::make(ptr, etype, nullptr, offset, not_flat, not_null_free, null_free);
6481 } else if (k->is_type_array_klass()) {
6482 // Element is an typeArray
6483 const Type* etype = get_const_basic_type(k->as_type_array_klass()->element_type());
6484 return TypeAryKlassPtr::make(ptr, etype, k, offset, not_flat, not_null_free, null_free);
6485 } else if (k->is_flat_array_klass()) {
6486 ciKlass* eklass = k->as_flat_array_klass()->element_klass();
6487 const TypeKlassPtr* etype = TypeKlassPtr::make(eklass);
6488 return TypeAryKlassPtr::make(ptr, etype, k, offset, not_flat, not_null_free, null_free);
6489 } else {
6490 ShouldNotReachHere();
6491 return nullptr;
6492 }
6493 }
6494
6495 const TypeAryKlassPtr* TypeAryKlassPtr::make(PTR ptr, ciKlass* k, Offset offset, InterfaceHandling interface_handling) {
6496 bool null_free = k->as_array_klass()->is_elem_null_free();
6497 bool not_null_free = (ptr == Constant) ? !null_free : !k->is_flat_array_klass() && (k->is_type_array_klass() || !k->as_array_klass()->element_klass()->can_be_inline_klass(false));
6498
6499 bool not_flat = !UseFlatArray || not_null_free || (k->as_array_klass()->element_klass() != nullptr &&
6500 k->as_array_klass()->element_klass()->is_inlinetype() &&
6501 !k->as_array_klass()->element_klass()->flat_in_array());
6502
6503 return TypeAryKlassPtr::make(ptr, k, offset, interface_handling, not_flat, not_null_free, null_free);
6504 }
6505
6506 const TypeAryKlassPtr* TypeAryKlassPtr::make(ciKlass* klass, InterfaceHandling interface_handling) {
6507 return TypeAryKlassPtr::make(Constant, klass, Offset(0), interface_handling);
6508 }
6509
6510 //------------------------------eq---------------------------------------------
6511 // Structural equality check for Type representations
6512 bool TypeAryKlassPtr::eq(const Type *t) const {
6513 const TypeAryKlassPtr *p = t->is_aryklassptr();
6514 return
6515 _elem == p->_elem && // Check array
6516 _not_flat == p->_not_flat &&
6517 _not_null_free == p->_not_null_free &&
6518 _null_free == p->_null_free &&
6519 TypeKlassPtr::eq(p); // Check sub-parts
6520 }
6521
6522 //------------------------------hash-------------------------------------------
6523 // Type-specific hashing function.
6524 uint TypeAryKlassPtr::hash(void) const {
6525 return (uint)(uintptr_t)_elem + TypeKlassPtr::hash() + (uint)(_not_flat ? 43 : 0) +
6526 (uint)(_not_null_free ? 44 : 0) + (uint)(_null_free ? 45 : 0);
6527 }
6528
6529 //----------------------compute_klass------------------------------------------
6530 // Compute the defining klass for this class
6531 ciKlass* TypeAryPtr::compute_klass() const {
6532 // Compute _klass based on element type.
6533 ciKlass* k_ary = nullptr;
6534 const TypeInstPtr *tinst;
6535 const TypeAryPtr *tary;
6536 const Type* el = elem();
6537 if (el->isa_narrowoop()) {
6538 el = el->make_ptr();
6539 }
6540
6541 // Get element klass
6542 if (is_flat() && el->is_inlinetypeptr()) {
6543 // Klass is required by TypeAryPtr::flat_layout_helper() and others
6544 if (el->inline_klass() != nullptr) {
6545 k_ary = ciArrayKlass::make(el->inline_klass(), /* null_free */ true);
6546 }
6547 } else if ((tinst = el->isa_instptr()) != nullptr) {
6548 // Leave k_ary at nullptr.
6549 } else if ((tary = el->isa_aryptr()) != nullptr) {
6550 // Leave k_ary at nullptr.
6551 } else if ((el->base() == Type::Top) ||
6552 (el->base() == Type::Bottom)) {
6553 // element type of Bottom occurs from meet of basic type
6554 // and object; Top occurs when doing join on Bottom.
6555 // Leave k_ary at null.
6556 } else {
6557 assert(!el->isa_int(), "integral arrays must be pre-equipped with a class");
6558 // Compute array klass directly from basic type
6559 k_ary = ciTypeArrayKlass::make(el->basic_type());
6560 }
6561 return k_ary;
6562 }
6563
6564 //------------------------------klass------------------------------------------
6565 // Return the defining klass for this class
6566 ciKlass* TypeAryPtr::klass() const {
6567 if( _klass ) return _klass; // Return cached value, if possible
6568
6569 // Oops, need to compute _klass and cache it
6570 ciKlass* k_ary = compute_klass();
6571
6572 if( this != TypeAryPtr::OOPS && this->dual() != TypeAryPtr::OOPS ) {
6573 // The _klass field acts as a cache of the underlying
6574 // ciKlass for this array type. In order to set the field,
6575 // we need to cast away const-ness.
6576 //
6577 // IMPORTANT NOTE: we *never* set the _klass field for the
6578 // type TypeAryPtr::OOPS. This Type is shared between all
6579 // active compilations. However, the ciKlass which represents
6580 // this Type is *not* shared between compilations, so caching
6581 // this value would result in fetching a dangling pointer.
6582 //
6583 // Recomputing the underlying ciKlass for each request is
6584 // a bit less efficient than caching, but calls to
6585 // TypeAryPtr::OOPS->klass() are not common enough to matter.
6586 ((TypeAryPtr*)this)->_klass = k_ary;
6587 }
6588 return k_ary;
6589 }
6590
6591 // Is there a single ciKlass* that can represent that type?
6592 ciKlass* TypeAryPtr::exact_klass_helper() const {
6593 if (_ary->_elem->make_ptr() && _ary->_elem->make_ptr()->isa_oopptr()) {
6594 ciKlass* k = _ary->_elem->make_ptr()->is_oopptr()->exact_klass_helper();
6595 if (k == nullptr) {
6596 return nullptr;
6597 }
6598 k = ciArrayKlass::make(k, is_null_free());
6599 return k;
6600 }
6601
6602 return klass();
6603 }
6604
6605 const Type* TypeAryPtr::base_element_type(int& dims) const {
6606 const Type* elem = this->elem();
6607 dims = 1;
6608 while (elem->make_ptr() && elem->make_ptr()->isa_aryptr()) {
6609 elem = elem->make_ptr()->is_aryptr()->elem();
6610 dims++;
6611 }
6612 return elem;
6613 }
6614
6615 //------------------------------add_offset-------------------------------------
6616 // Access internals of klass object
6617 const TypePtr* TypeAryKlassPtr::add_offset(intptr_t offset) const {
6618 return make(_ptr, elem(), klass(), xadd_offset(offset), is_not_flat(), is_not_null_free(), _null_free);
6619 }
6620
6621 const TypeAryKlassPtr* TypeAryKlassPtr::with_offset(intptr_t offset) const {
6622 return make(_ptr, elem(), klass(), Offset(offset), is_not_flat(), is_not_null_free(), _null_free);
6623 }
6624
6625 //------------------------------cast_to_ptr_type-------------------------------
6626 const TypeAryKlassPtr* TypeAryKlassPtr::cast_to_ptr_type(PTR ptr) const {
6627 assert(_base == AryKlassPtr, "subclass must override cast_to_ptr_type");
6628 if (ptr == _ptr) return this;
6629 return make(ptr, elem(), _klass, _offset, is_not_flat(), is_not_null_free(), _null_free);
6630 }
6631
6632 bool TypeAryKlassPtr::must_be_exact() const {
6633 if (_elem == Type::BOTTOM) return false;
6634 if (_elem == Type::TOP ) return false;
6635 const TypeKlassPtr* tk = _elem->isa_klassptr();
6636 if (!tk) return true; // a primitive type, like int
6637 // Even though MyValue is final, [LMyValue is only exact if the array
6638 // is null-free due to null-free [LMyValue <: null-able [LMyValue.
6639 if (tk->isa_instklassptr() && tk->klass()->is_inlinetype() && !is_null_free()) {
6640 return false;
6641 }
6642 return tk->must_be_exact();
6643 }
6644
6645
6646 //-----------------------------cast_to_exactness-------------------------------
6647 const TypeKlassPtr *TypeAryKlassPtr::cast_to_exactness(bool klass_is_exact) const {
6648 if (must_be_exact() && !klass_is_exact) return this; // cannot clear xk
6649 if (klass_is_exact == this->klass_is_exact()) {
6650 return this;
6651 }
6652 ciKlass* k = _klass;
6653 const Type* elem = this->elem();
6654 if (elem->isa_klassptr() && !klass_is_exact) {
6655 elem = elem->is_klassptr()->cast_to_exactness(klass_is_exact);
6656 }
6657 bool not_flat = is_not_flat();
6658 bool not_null_free = is_not_null_free();
6659 if (_elem->isa_klassptr()) {
6660 if (klass_is_exact || _elem->isa_aryklassptr()) {
6661 assert(!is_null_free() && !is_flat(), "null-free (or flat) inline type arrays should always be exact");
6662 // An array can't be null-free (or flat) if the klass is exact
6663 not_null_free = true;
6664 not_flat = true;
6665 } else {
6666 // Klass is not exact (anymore), re-compute null-free/flat properties
6667 const TypeOopPtr* exact_etype = TypeOopPtr::make_from_klass_unique(_elem->is_instklassptr()->instance_klass());
6668 not_null_free = !exact_etype->can_be_inline_type();
6669 not_flat = !UseFlatArray || not_null_free || (exact_etype->is_inlinetypeptr() && !exact_etype->inline_klass()->flat_in_array());
6670 }
6671 }
6672 return make(klass_is_exact ? Constant : NotNull, elem, k, _offset, not_flat, not_null_free, _null_free);
6673 }
6674
6675 const TypeAryKlassPtr* TypeAryKlassPtr::cast_to_null_free() const {
6676 return make(_ptr, elem(), klass(), _offset, is_not_flat(), false, true);
6677 }
6678
6679 //-----------------------------as_instance_type--------------------------------
6680 // Corresponding type for an instance of the given class.
6681 // It will be NotNull, and exact if and only if the klass type is exact.
6682 const TypeOopPtr* TypeAryKlassPtr::as_instance_type(bool klass_change) const {
6683 ciKlass* k = klass();
6684 bool xk = klass_is_exact();
6685 const Type* el = nullptr;
6686 if (elem()->isa_klassptr()) {
6687 el = elem()->is_klassptr()->as_instance_type(false)->cast_to_exactness(false);
6688 k = nullptr;
6689 } else {
6690 el = elem();
6691 }
6692 bool null_free = _null_free;
6693 if (null_free && el->isa_ptr()) {
6694 el = el->is_ptr()->join_speculative(TypePtr::NOTNULL);
6695 }
6696 return TypeAryPtr::make(TypePtr::BotPTR, TypeAry::make(el, TypeInt::POS, false, is_flat(), is_not_flat(), is_not_null_free()), k, xk, Offset(0));
6697 }
6698
6699
6700 //------------------------------xmeet------------------------------------------
6701 // Compute the MEET of two types, return a new Type object.
6702 const Type *TypeAryKlassPtr::xmeet( const Type *t ) const {
6703 // Perform a fast test for common case; meeting the same types together.
6704 if( this == t ) return this; // Meeting same type-rep?
6705
6706 // Current "this->_base" is Pointer
6707 switch (t->base()) { // switch on original type
6708
6709 case Int: // Mixing ints & oops happens when javac
6710 case Long: // reuses local variables
6711 case FloatTop:
6712 case FloatCon:
6713 case FloatBot:
6714 case DoubleTop:
6715 case DoubleCon:
6716 case DoubleBot:
6717 case NarrowOop:
6718 case NarrowKlass:
6719 case Bottom: // Ye Olde Default
6720 return Type::BOTTOM;
6721 case Top:
6722 return this;
6723
6724 default: // All else is a mistake
6725 typerr(t);
6726
6727 case AnyPtr: { // Meeting to AnyPtrs
6728 // Found an AnyPtr type vs self-KlassPtr type
6729 const TypePtr *tp = t->is_ptr();
6730 Offset offset = meet_offset(tp->offset());
6731 PTR ptr = meet_ptr(tp->ptr());
6732 switch (tp->ptr()) {
6733 case TopPTR:
6734 return this;
6735 case Null:
6736 if( ptr == Null ) return TypePtr::make(AnyPtr, ptr, offset, tp->speculative(), tp->inline_depth());
6737 case AnyNull:
6738 return make(ptr, _elem, klass(), offset, is_not_flat(), is_not_null_free(), is_null_free());
6739 case BotPTR:
6740 case NotNull:
6741 return TypePtr::make(AnyPtr, ptr, offset, tp->speculative(), tp->inline_depth());
6742 default: typerr(t);
6743 }
6744 }
6745
6746 case RawPtr:
6747 case MetadataPtr:
6748 case OopPtr:
6749 case AryPtr: // Meet with AryPtr
6750 case InstPtr: // Meet with InstPtr
6751 return TypePtr::BOTTOM;
6752
6753 //
6754 // A-top }
6755 // / | \ } Tops
6756 // B-top A-any C-top }
6757 // | / | \ | } Any-nulls
6758 // B-any | C-any }
6759 // | | |
6760 // B-con A-con C-con } constants; not comparable across classes
6761 // | | |
6762 // B-not | C-not }
6763 // | \ | / | } not-nulls
6764 // B-bot A-not C-bot }
6765 // \ | / } Bottoms
6766 // A-bot }
6767 //
6768
6769 case AryKlassPtr: { // Meet two KlassPtr types
6770 const TypeAryKlassPtr *tap = t->is_aryklassptr();
6771 Offset off = meet_offset(tap->offset());
6772 const Type* elem = _elem->meet(tap->_elem);
6773 PTR ptr = meet_ptr(tap->ptr());
6774 ciKlass* res_klass = nullptr;
6775 bool res_xk = false;
6776 bool res_flat = false;
6777 bool res_not_flat = false;
6778 bool res_not_null_free = false;
6779 MeetResult res = meet_aryptr(ptr, elem, this, tap,
6780 res_klass, res_xk, res_flat, res_not_flat, res_not_null_free);
6781 assert(res_xk == (ptr == Constant), "");
6782 bool null_free = meet_null_free(tap->_null_free);
6783 if (res == NOT_SUBTYPE) {
6784 null_free = false;
6785 } else if (res == SUBTYPE) {
6786 if (above_centerline(tap->ptr()) && !above_centerline(this->ptr())) {
6787 null_free = _null_free;
6788 } else if (above_centerline(this->ptr()) && !above_centerline(tap->ptr())) {
6789 null_free = tap->_null_free;
6790 } else if (above_centerline(this->ptr()) && above_centerline(tap->ptr())) {
6791 null_free = _null_free || tap->_null_free;
6792 }
6793 }
6794 return make(ptr, elem, res_klass, off, res_not_flat, res_not_null_free, null_free);
6795 } // End of case KlassPtr
6796 case InstKlassPtr: {
6797 const TypeInstKlassPtr *tp = t->is_instklassptr();
6798 Offset offset = meet_offset(tp->offset());
6799 PTR ptr = meet_ptr(tp->ptr());
6800 const TypeInterfaces* interfaces = meet_interfaces(tp);
6801 const TypeInterfaces* tp_interfaces = tp->_interfaces;
6802 const TypeInterfaces* this_interfaces = _interfaces;
6803
6804 switch (ptr) {
6805 case TopPTR:
6806 case AnyNull: // Fall 'down' to dual of object klass
6807 // For instances when a subclass meets a superclass we fall
6808 // below the centerline when the superclass is exact. We need to
6809 // do the same here.
6810 if (tp->klass()->equals(ciEnv::current()->Object_klass()) && this_interfaces->contains(tp_interfaces) &&
6811 !tp->klass_is_exact()) {
6812 return TypeAryKlassPtr::make(ptr, _elem, _klass, offset, is_not_flat(), is_not_null_free(), is_null_free());
6813 } else {
6814 // cannot subclass, so the meet has to fall badly below the centerline
6815 ptr = NotNull;
6816 interfaces = this_interfaces->intersection_with(tp->_interfaces);
6817 return TypeInstKlassPtr::make(ptr, ciEnv::current()->Object_klass(), interfaces, offset, false);
6818 }
6819 case Constant:
6820 case NotNull:
6821 case BotPTR: // Fall down to object klass
6822 // LCA is object_klass, but if we subclass from the top we can do better
6823 if (above_centerline(tp->ptr())) {
6824 // If 'tp' is above the centerline and it is Object class
6825 // then we can subclass in the Java class hierarchy.
6826 // For instances when a subclass meets a superclass we fall
6827 // below the centerline when the superclass is exact. We need
6828 // to do the same here.
6829 if (tp->klass()->equals(ciEnv::current()->Object_klass()) && this_interfaces->contains(tp_interfaces) &&
6830 !tp->klass_is_exact()) {
6831 // that is, my array type is a subtype of 'tp' klass
6832 return make(ptr, _elem, _klass, offset, is_not_flat(), is_not_null_free(), is_null_free());
6833 }
6834 }
6835 // The other case cannot happen, since t cannot be a subtype of an array.
6836 // The meet falls down to Object class below centerline.
6837 if (ptr == Constant)
6838 ptr = NotNull;
6839 interfaces = this_interfaces->intersection_with(tp_interfaces);
6840 return TypeInstKlassPtr::make(ptr, ciEnv::current()->Object_klass(), interfaces, offset, false);
6841 default: typerr(t);
6842 }
6843 }
6844
6845 } // End of switch
6846 return this; // Return the double constant
6847 }
6848
6849 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) {
6850 static_assert(std::is_base_of<T2, T1>::value, "");
6851
6852 if (other->klass() == ciEnv::current()->Object_klass() && other->_interfaces->empty() && other_exact) {
6853 return true;
6854 }
6855
6856 int dummy;
6857 bool this_top_or_bottom = (this_one->base_element_type(dummy) == Type::TOP || this_one->base_element_type(dummy) == Type::BOTTOM);
6858
6859 if (!this_one->is_loaded() || !other->is_loaded() || this_top_or_bottom) {
6860 return false;
6861 }
6862
6863 if (this_one->is_instance_type(other)) {
6864 return other->klass() == ciEnv::current()->Object_klass() && this_one->_interfaces->contains(other->_interfaces) &&
6865 other_exact;
6866 }
6867
6868 assert(this_one->is_array_type(other), "");
6869 const T1* other_ary = this_one->is_array_type(other);
6870 bool other_top_or_bottom = (other_ary->base_element_type(dummy) == Type::TOP || other_ary->base_element_type(dummy) == Type::BOTTOM);
6871 if (other_top_or_bottom) {
6872 return false;
6873 }
6874
6875 const TypePtr* other_elem = other_ary->elem()->make_ptr();
6876 const TypePtr* this_elem = this_one->elem()->make_ptr();
6877 if (this_elem != nullptr && other_elem != nullptr) {
6878 if (other->is_null_free() && !this_one->is_null_free()) {
6879 return false; // A nullable array can't be a subtype of a null-free array
6880 }
6881 return this_one->is_reference_type(this_elem)->is_java_subtype_of_helper(this_one->is_reference_type(other_elem), this_exact, other_exact);
6882 }
6883 if (this_elem == nullptr && other_elem == nullptr) {
6884 return this_one->klass()->is_subtype_of(other->klass());
6885 }
6886 return false;
6887 }
6888
6889 bool TypeAryKlassPtr::is_java_subtype_of_helper(const TypeKlassPtr* other, bool this_exact, bool other_exact) const {
6890 return TypePtr::is_java_subtype_of_helper_for_array(this, other, this_exact, other_exact);
6891 }
6892
6893 template <class T1, class T2> bool TypePtr::is_same_java_type_as_helper_for_array(const T1* this_one, const T2* other) {
6894 static_assert(std::is_base_of<T2, T1>::value, "");
6895
6896 int dummy;
6897 bool this_top_or_bottom = (this_one->base_element_type(dummy) == Type::TOP || this_one->base_element_type(dummy) == Type::BOTTOM);
6898
6899 if (!this_one->is_array_type(other) ||
6900 !this_one->is_loaded() || !other->is_loaded() || this_top_or_bottom) {
6901 return false;
6902 }
6903 const T1* other_ary = this_one->is_array_type(other);
6904 bool other_top_or_bottom = (other_ary->base_element_type(dummy) == Type::TOP || other_ary->base_element_type(dummy) == Type::BOTTOM);
6905
6906 if (other_top_or_bottom) {
6907 return false;
6908 }
6909
6910 const TypePtr* other_elem = other_ary->elem()->make_ptr();
6911 const TypePtr* this_elem = this_one->elem()->make_ptr();
6912 if (other_elem != nullptr && this_elem != nullptr) {
6913 return this_one->is_reference_type(this_elem)->is_same_java_type_as(this_one->is_reference_type(other_elem));
6914 }
6915 if (other_elem == nullptr && this_elem == nullptr) {
6916 return this_one->klass()->equals(other->klass());
6917 }
6918 return false;
6919 }
6920
6921 bool TypeAryKlassPtr::is_same_java_type_as_helper(const TypeKlassPtr* other) const {
6922 return TypePtr::is_same_java_type_as_helper_for_array(this, other);
6923 }
6924
6925 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) {
6926 static_assert(std::is_base_of<T2, T1>::value, "");
6927 if (other->klass() == ciEnv::current()->Object_klass() && other->_interfaces->empty() && other_exact) {
6928 return true;
6929 }
6930 if (!this_one->is_loaded() || !other->is_loaded()) {
6931 return true;
6932 }
6933 if (this_one->is_instance_type(other)) {
6934 return other->klass()->equals(ciEnv::current()->Object_klass()) &&
6935 this_one->_interfaces->contains(other->_interfaces);
6936 }
6937
6938 int dummy;
6939 bool this_top_or_bottom = (this_one->base_element_type(dummy) == Type::TOP || this_one->base_element_type(dummy) == Type::BOTTOM);
6940 if (this_top_or_bottom) {
6941 return true;
6942 }
6943
6944 assert(this_one->is_array_type(other), "");
6945
6946 const T1* other_ary = this_one->is_array_type(other);
6947 bool other_top_or_bottom = (other_ary->base_element_type(dummy) == Type::TOP || other_ary->base_element_type(dummy) == Type::BOTTOM);
6948 if (other_top_or_bottom) {
6949 return true;
6950 }
6951 if (this_exact && other_exact) {
6952 return this_one->is_java_subtype_of(other);
6953 }
6954
6955 const TypePtr* this_elem = this_one->elem()->make_ptr();
6956 const TypePtr* other_elem = other_ary->elem()->make_ptr();
6957 if (other_elem != nullptr && this_elem != nullptr) {
6958 return this_one->is_reference_type(this_elem)->maybe_java_subtype_of_helper(this_one->is_reference_type(other_elem), this_exact, other_exact);
6959 }
6960 if (other_elem == nullptr && this_elem == nullptr) {
6961 return this_one->klass()->is_subtype_of(other->klass());
6962 }
6963 return false;
6964 }
6965
6966 bool TypeAryKlassPtr::maybe_java_subtype_of_helper(const TypeKlassPtr* other, bool this_exact, bool other_exact) const {
6967 return TypePtr::maybe_java_subtype_of_helper_for_array(this, other, this_exact, other_exact);
6968 }
6969
6970 //------------------------------xdual------------------------------------------
6971 // Dual: compute field-by-field dual
6972 const Type *TypeAryKlassPtr::xdual() const {
6973 return new TypeAryKlassPtr(dual_ptr(), elem()->dual(), klass(), dual_offset(), !is_not_flat(), !is_not_null_free(), dual_null_free());
6974 }
6975
6976 // Is there a single ciKlass* that can represent that type?
6977 ciKlass* TypeAryKlassPtr::exact_klass_helper() const {
6978 if (elem()->isa_klassptr()) {
6979 ciKlass* k = elem()->is_klassptr()->exact_klass_helper();
6980 if (k == nullptr) {
6981 return nullptr;
6982 }
6983 k = ciArrayKlass::make(k, _null_free);
6984 return k;
6985 }
6986
6987 return klass();
6988 }
6989
6990 ciKlass* TypeAryKlassPtr::klass() const {
6991 if (_klass != nullptr) {
6992 return _klass;
6993 }
6994 ciKlass* k = nullptr;
6995 if (elem()->isa_klassptr()) {
6996 // leave null
6997 } else if ((elem()->base() == Type::Top) ||
6998 (elem()->base() == Type::Bottom)) {
6999 } else {
7000 k = ciTypeArrayKlass::make(elem()->basic_type());
7001 ((TypeAryKlassPtr*)this)->_klass = k;
7002 }
7003 return k;
7004 }
7005
7006 //------------------------------dump2------------------------------------------
7007 // Dump Klass Type
7008 #ifndef PRODUCT
7009 void TypeAryKlassPtr::dump2( Dict & d, uint depth, outputStream *st ) const {
7010 switch( _ptr ) {
7011 case Constant:
7012 st->print("precise ");
7013 case NotNull:
7014 {
7015 st->print("[");
7016 _elem->dump2(d, depth, st);
7017 _interfaces->dump(st);
7018 st->print(": ");
7019 }
7020 case BotPTR:
7021 if( !WizardMode && !Verbose && _ptr != Constant ) break;
7022 case TopPTR:
7023 case AnyNull:
7024 st->print(":%s", ptr_msg[_ptr]);
7025 if( _ptr == Constant ) st->print(":exact");
7026 break;
7027 default:
7028 break;
7029 }
7030 if (is_flat()) st->print(":flat");
7031 if (_null_free) st->print(":null free");
7032 if (Verbose) {
7033 if (_not_flat) st->print(":not flat");
7034 if (_not_null_free) st->print(":not null free");
7035 }
7036
7037 _offset.dump2(st);
7038
7039 st->print(" *");
7040 }
7041 #endif
7042
7043 const Type* TypeAryKlassPtr::base_element_type(int& dims) const {
7044 const Type* elem = this->elem();
7045 dims = 1;
7046 while (elem->isa_aryklassptr()) {
7047 elem = elem->is_aryklassptr()->elem();
7048 dims++;
7049 }
7050 return elem;
7051 }
7052
7053 //=============================================================================
7054 // Convenience common pre-built types.
7055
7056 //------------------------------make-------------------------------------------
7057 const TypeFunc *TypeFunc::make(const TypeTuple *domain_sig, const TypeTuple* domain_cc,
7058 const TypeTuple *range_sig, const TypeTuple *range_cc) {
7059 return (TypeFunc*)(new TypeFunc(domain_sig, domain_cc, range_sig, range_cc))->hashcons();
7060 }
7061
7062 const TypeFunc *TypeFunc::make(const TypeTuple *domain, const TypeTuple *range) {
7063 return make(domain, domain, range, range);
7064 }
7065
7066 //------------------------------osr_domain-----------------------------
7067 const TypeTuple* osr_domain() {
7068 const Type **fields = TypeTuple::fields(2);
7069 fields[TypeFunc::Parms+0] = TypeRawPtr::BOTTOM; // address of osr buffer
7070 return TypeTuple::make(TypeFunc::Parms+1, fields);
7071 }
7072
7073 //------------------------------make-------------------------------------------
7074 const TypeFunc* TypeFunc::make(ciMethod* method, bool is_osr_compilation) {
7075 Compile* C = Compile::current();
7076 const TypeFunc* tf = nullptr;
7077 if (!is_osr_compilation) {
7078 tf = C->last_tf(method); // check cache
7079 if (tf != nullptr) return tf; // The hit rate here is almost 50%.
7080 }
7081 // Inline types are not passed/returned by reference, instead each field of
7082 // the inline type is passed/returned as an argument. We maintain two views of
7083 // the argument/return list here: one based on the signature (with an inline
7084 // type argument/return as a single slot), one based on the actual calling
7085 // convention (with an inline type argument/return as a list of its fields).
7086 bool has_scalar_args = method->has_scalarized_args() && !is_osr_compilation;
7087 // Fall back to the non-scalarized calling convention when compiling a call via a mismatching method
7088 if (method != C->method() && method->get_Method()->mismatch()) {
7089 has_scalar_args = false;
7090 }
7091 const TypeTuple* domain_sig = is_osr_compilation ? osr_domain() : TypeTuple::make_domain(method, ignore_interfaces, false);
7092 const TypeTuple* domain_cc = has_scalar_args ? TypeTuple::make_domain(method, ignore_interfaces, true) : domain_sig;
7093 ciSignature* sig = method->signature();
7094 bool has_scalar_ret = !method->is_native() && sig->return_type()->is_inlinetype() && sig->return_type()->as_inline_klass()->can_be_returned_as_fields();
7095 const TypeTuple* range_sig = TypeTuple::make_range(sig, ignore_interfaces, false);
7096 const TypeTuple* range_cc = has_scalar_ret ? TypeTuple::make_range(sig, ignore_interfaces, true) : range_sig;
7097 tf = TypeFunc::make(domain_sig, domain_cc, range_sig, range_cc);
7098 if (!is_osr_compilation) {
7099 C->set_last_tf(method, tf); // fill cache
7100 }
7101 return tf;
7102 }
7103
7104 //------------------------------meet-------------------------------------------
7105 // Compute the MEET of two types. It returns a new Type object.
7106 const Type *TypeFunc::xmeet( const Type *t ) const {
7107 // Perform a fast test for common case; meeting the same types together.
7108 if( this == t ) return this; // Meeting same type-rep?
7109
7110 // Current "this->_base" is Func
7111 switch (t->base()) { // switch on original type
7112
7113 case Bottom: // Ye Olde Default
7114 return t;
7115
7116 default: // All else is a mistake
7117 typerr(t);
7118
7119 case Top:
7120 break;
7121 }
7122 return this; // Return the double constant
7123 }
7124
7125 //------------------------------xdual------------------------------------------
7126 // Dual: compute field-by-field dual
7127 const Type *TypeFunc::xdual() const {
7128 return this;
7129 }
7130
7131 //------------------------------eq---------------------------------------------
7132 // Structural equality check for Type representations
7133 bool TypeFunc::eq( const Type *t ) const {
7134 const TypeFunc *a = (const TypeFunc*)t;
7135 return _domain_sig == a->_domain_sig &&
7136 _domain_cc == a->_domain_cc &&
7137 _range_sig == a->_range_sig &&
7138 _range_cc == a->_range_cc;
7139 }
7140
7141 //------------------------------hash-------------------------------------------
7142 // Type-specific hashing function.
7143 uint TypeFunc::hash(void) const {
7144 return (uint)(intptr_t)_domain_sig + (uint)(intptr_t)_domain_cc + (uint)(intptr_t)_range_sig + (uint)(intptr_t)_range_cc;
7145 }
7146
7147 //------------------------------dump2------------------------------------------
7148 // Dump Function Type
7149 #ifndef PRODUCT
7150 void TypeFunc::dump2( Dict &d, uint depth, outputStream *st ) const {
7151 if( _range_sig->cnt() <= Parms )
7152 st->print("void");
7153 else {
7154 uint i;
7155 for (i = Parms; i < _range_sig->cnt()-1; i++) {
7156 _range_sig->field_at(i)->dump2(d,depth,st);
7157 st->print("/");
7158 }
7159 _range_sig->field_at(i)->dump2(d,depth,st);
7160 }
7161 st->print(" ");
7162 st->print("( ");
7163 if( !depth || d[this] ) { // Check for recursive dump
7164 st->print("...)");
7165 return;
7166 }
7167 d.Insert((void*)this,(void*)this); // Stop recursion
7168 if (Parms < _domain_sig->cnt())
7169 _domain_sig->field_at(Parms)->dump2(d,depth-1,st);
7170 for (uint i = Parms+1; i < _domain_sig->cnt(); i++) {
7171 st->print(", ");
7172 _domain_sig->field_at(i)->dump2(d,depth-1,st);
7173 }
7174 st->print(" )");
7175 }
7176 #endif
7177
7178 //------------------------------singleton--------------------------------------
7179 // TRUE if Type is a singleton type, FALSE otherwise. Singletons are simple
7180 // constants (Ldi nodes). Singletons are integer, float or double constants
7181 // or a single symbol.
7182 bool TypeFunc::singleton(void) const {
7183 return false; // Never a singleton
7184 }
7185
7186 bool TypeFunc::empty(void) const {
7187 return false; // Never empty
7188 }
7189
7190
7191 BasicType TypeFunc::return_type() const{
7192 if (range_sig()->cnt() == TypeFunc::Parms) {
7193 return T_VOID;
7194 }
7195 return range_sig()->field_at(TypeFunc::Parms)->basic_type();
7196 }